drivers/scsi/smartpqi/smartpqi_init.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    driver for Microchip PQI-based storage controllers
   4  *    Copyright (c) 2019-2021 Microchip Technology Inc. and its subsidiaries
   5  *    Copyright (c) 2016-2018 Microsemi Corporation
   6  *    Copyright (c) 2016 PMC-Sierra, Inc.
   7  *
   8  *    Questions/Comments/Bugfixes to storagedev@microchip.com
   9  *
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/pci.h>
  15 #include <linux/delay.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/sched.h>
  18 #include <linux/rtc.h>
  19 #include <linux/bcd.h>
  20 #include <linux/reboot.h>
  21 #include <linux/cciss_ioctl.h>
  22 #include <linux/blk-mq-pci.h>
  23 #include <scsi/scsi_host.h>
  24 #include <scsi/scsi_cmnd.h>
  25 #include <scsi/scsi_device.h>
  26 #include <scsi/scsi_eh.h>
  27 #include <scsi/scsi_transport_sas.h>
  28 #include <asm/unaligned.h>
  29 #include "smartpqi.h"
  30 #include "smartpqi_sis.h"
  31
  32 #if !defined(BUILD_TIMESTAMP)
  33 #define BUILD_TIMESTAMP
  34 #endif
  35
  36 #define DRIVER_VERSION          "2.1.10-020"
  37 #define DRIVER_MAJOR            2
  38 #define DRIVER_MINOR            1
  39 #define DRIVER_RELEASE          10
  40 #define DRIVER_REVISION         20
  41
  42 #define DRIVER_NAME             "Microchip SmartPQI Driver (v" \
  43                                 DRIVER_VERSION BUILD_TIMESTAMP ")"
  44 #define DRIVER_NAME_SHORT       "smartpqi"
  45
  46 #define PQI_EXTRA_SGL_MEMORY    (12 * sizeof(struct pqi_sg_descriptor))
  47
  48 #define PQI_POST_RESET_DELAY_SECS                       5
  49 #define PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS      10
  50
  51 MODULE_AUTHOR("Microchip");
  52 MODULE_DESCRIPTION("Driver for Microchip Smart Family Controller version "
  53         DRIVER_VERSION);
  54 MODULE_VERSION(DRIVER_VERSION);
  55 MODULE_LICENSE("GPL");
  56
  57 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
  58 static void pqi_ctrl_offline_worker(struct work_struct *work);
  59 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  60 static void pqi_scan_start(struct Scsi_Host *shost);
  61 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  62         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  63         struct pqi_io_request *io_request);
  64 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  65         struct pqi_iu_header *request, unsigned int flags,
  66         struct pqi_raid_error_info *error_info);
  67 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  68         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  69         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  70         struct pqi_encryption_info *encryption_info, bool raid_bypass);
  71 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
  72         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
  73         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
  74         struct pqi_scsi_dev_raid_map_data *rmd);
  75 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
  76         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
  77         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
  78         struct pqi_scsi_dev_raid_map_data *rmd);
  79 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
  80 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
  81 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs);
  82 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info);
  83 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
  84 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
  85 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
  86         struct pqi_scsi_dev *device, unsigned long timeout_msecs);
  87
  88 /* for flags argument to pqi_submit_raid_request_synchronous() */
  89 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
  90
  91 static struct scsi_transport_template *pqi_sas_transport_template;
  92
  93 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  94
  95 enum pqi_lockup_action {
  96         NONE,
  97         REBOOT,
  98         PANIC
  99 };
 100
 101 static enum pqi_lockup_action pqi_lockup_action = NONE;
 102
 103 static struct {
 104         enum pqi_lockup_action  action;
 105         char                    *name;
 106 } pqi_lockup_actions[] = {
 107         {
 108                 .action = NONE,
 109                 .name = "none",
 110         },
 111         {
 112                 .action = REBOOT,
 113                 .name = "reboot",
 114         },
 115         {
 116                 .action = PANIC,
 117                 .name = "panic",
 118         },
 119 };
 120
 121 static unsigned int pqi_supported_event_types[] = {
 122         PQI_EVENT_TYPE_HOTPLUG,
 123         PQI_EVENT_TYPE_HARDWARE,
 124         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 125         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 126         PQI_EVENT_TYPE_OFA,
 127         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 128         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 129 };
 130
 131 static int pqi_disable_device_id_wildcards;
 132 module_param_named(disable_device_id_wildcards,
 133         pqi_disable_device_id_wildcards, int, 0644);
 134 MODULE_PARM_DESC(disable_device_id_wildcards,
 135         "Disable device ID wildcards.");
 136
 137 static int pqi_disable_heartbeat;
 138 module_param_named(disable_heartbeat,
 139         pqi_disable_heartbeat, int, 0644);
 140 MODULE_PARM_DESC(disable_heartbeat,
 141         "Disable heartbeat.");
 142
 143 static int pqi_disable_ctrl_shutdown;
 144 module_param_named(disable_ctrl_shutdown,
 145         pqi_disable_ctrl_shutdown, int, 0644);
 146 MODULE_PARM_DESC(disable_ctrl_shutdown,
 147         "Disable controller shutdown when controller locked up.");
 148
 149 static char *pqi_lockup_action_param;
 150 module_param_named(lockup_action,
 151         pqi_lockup_action_param, charp, 0644);
 152 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 153         "\t\tSupported: none, reboot, panic\n"
 154         "\t\tDefault: none");
 155
 156 static int pqi_expose_ld_first;
 157 module_param_named(expose_ld_first,
 158         pqi_expose_ld_first, int, 0644);
 159 MODULE_PARM_DESC(expose_ld_first, "Expose logical drives before physical drives.");
 160
 161 static int pqi_hide_vsep;
 162 module_param_named(hide_vsep,
 163         pqi_hide_vsep, int, 0644);
 164 MODULE_PARM_DESC(hide_vsep, "Hide the virtual SEP for direct attached drives.");
 165
 166 static char *raid_levels[] = {
 167         "RAID-0",
 168         "RAID-4",
 169         "RAID-1(1+0)",
 170         "RAID-5",
 171         "RAID-5+1",
 172         "RAID-6",
 173         "RAID-1(Triple)",
 174 };
 175
 176 static char *pqi_raid_level_to_string(u8 raid_level)
 177 {
 178         if (raid_level < ARRAY_SIZE(raid_levels))
 179                 return raid_levels[raid_level];
 180
 181         return "RAID UNKNOWN";
 182 }
 183
 184 #define SA_RAID_0               0
 185 #define SA_RAID_4               1
 186 #define SA_RAID_1               2       /* also used for RAID 10 */
 187 #define SA_RAID_5               3       /* also used for RAID 50 */
 188 #define SA_RAID_51              4
 189 #define SA_RAID_6               5       /* also used for RAID 60 */
 190 #define SA_RAID_TRIPLE          6       /* also used for RAID 1+0 Triple */
 191 #define SA_RAID_MAX             SA_RAID_TRIPLE
 192 #define SA_RAID_UNKNOWN         0xff
 193
 194 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 195 {
 196         pqi_prep_for_scsi_done(scmd);
 197         scmd->scsi_done(scmd);
 198 }
 199
 200 static inline void pqi_disable_write_same(struct scsi_device *sdev)
 201 {
 202         sdev->no_write_same = 1;
 203 }
 204
 205 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 206 {
 207         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 208 }
 209
 210 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 211 {
 212         return !device->is_physical_device;
 213 }
 214
 215 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 216 {
 217         return scsi3addr[2] != 0;
 218 }
 219
 220 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 221 {
 222         return !ctrl_info->controller_online;
 223 }
 224
 225 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 226 {
 227         if (ctrl_info->controller_online)
 228                 if (!sis_is_firmware_running(ctrl_info))
 229                         pqi_take_ctrl_offline(ctrl_info);
 230 }
 231
 232 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 233 {
 234         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 235 }
 236
 237 #define PQI_DRIVER_SCRATCH_PQI_MODE                     0x1
 238 #define PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED          0x2
 239
 240 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(struct pqi_ctrl_info *ctrl_info)
 241 {
 242         return sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_PQI_MODE ? PQI_MODE : SIS_MODE;
 243 }
 244
 245 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 246         enum pqi_ctrl_mode mode)
 247 {
 248         u32 driver_scratch;
 249
 250         driver_scratch = sis_read_driver_scratch(ctrl_info);
 251
 252         if (mode == PQI_MODE)
 253                 driver_scratch |= PQI_DRIVER_SCRATCH_PQI_MODE;
 254         else
 255                 driver_scratch &= ~PQI_DRIVER_SCRATCH_PQI_MODE;
 256
 257         sis_write_driver_scratch(ctrl_info, driver_scratch);
 258 }
 259
 260 static inline bool pqi_is_fw_triage_supported(struct pqi_ctrl_info *ctrl_info)
 261 {
 262         return (sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED) != 0;
 263 }
 264
 265 static inline void pqi_save_fw_triage_setting(struct pqi_ctrl_info *ctrl_info, bool is_supported)
 266 {
 267         u32 driver_scratch;
 268
 269         driver_scratch = sis_read_driver_scratch(ctrl_info);
 270
 271         if (is_supported)
 272                 driver_scratch |= PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
 273         else
 274                 driver_scratch &= ~PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
 275
 276         sis_write_driver_scratch(ctrl_info, driver_scratch);
 277 }
 278
 279 static inline void pqi_ctrl_block_scan(struct pqi_ctrl_info *ctrl_info)
 280 {
 281         ctrl_info->scan_blocked = true;
 282         mutex_lock(&ctrl_info->scan_mutex);
 283 }
 284
 285 static inline void pqi_ctrl_unblock_scan(struct pqi_ctrl_info *ctrl_info)
 286 {
 287         ctrl_info->scan_blocked = false;
 288         mutex_unlock(&ctrl_info->scan_mutex);
 289 }
 290
 291 static inline bool pqi_ctrl_scan_blocked(struct pqi_ctrl_info *ctrl_info)
 292 {
 293         return ctrl_info->scan_blocked;
 294 }
 295
 296 static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info)
 297 {
 298         mutex_lock(&ctrl_info->lun_reset_mutex);
 299 }
 300
 301 static inline void pqi_ctrl_unblock_device_reset(struct pqi_ctrl_info *ctrl_info)
 302 {
 303         mutex_unlock(&ctrl_info->lun_reset_mutex);
 304 }
 305
 306 static inline void pqi_scsi_block_requests(struct pqi_ctrl_info *ctrl_info)
 307 {
 308         struct Scsi_Host *shost;
 309         unsigned int num_loops;
 310         int msecs_sleep;
 311
 312         shost = ctrl_info->scsi_host;
 313
 314         scsi_block_requests(shost);
 315
 316         num_loops = 0;
 317         msecs_sleep = 20;
 318         while (scsi_host_busy(shost)) {
 319                 num_loops++;
 320                 if (num_loops == 10)
 321                         msecs_sleep = 500;
 322                 msleep(msecs_sleep);
 323         }
 324 }
 325
 326 static inline void pqi_scsi_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 327 {
 328         scsi_unblock_requests(ctrl_info->scsi_host);
 329 }
 330
 331 static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
 332 {
 333         atomic_inc(&ctrl_info->num_busy_threads);
 334 }
 335
 336 static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
 337 {
 338         atomic_dec(&ctrl_info->num_busy_threads);
 339 }
 340
 341 static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 342 {
 343         return ctrl_info->block_requests;
 344 }
 345
 346 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 347 {
 348         ctrl_info->block_requests = true;
 349 }
 350
 351 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 352 {
 353         ctrl_info->block_requests = false;
 354         wake_up_all(&ctrl_info->block_requests_wait);
 355 }
 356
 357 static void pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 358 {
 359         if (!pqi_ctrl_blocked(ctrl_info))
 360                 return;
 361
 362         atomic_inc(&ctrl_info->num_blocked_threads);
 363         wait_event(ctrl_info->block_requests_wait,
 364                 !pqi_ctrl_blocked(ctrl_info));
 365         atomic_dec(&ctrl_info->num_blocked_threads);
 366 }
 367
 368 #define PQI_QUIESCE_WARNING_TIMEOUT_SECS                10
 369
 370 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 371 {
 372         unsigned long start_jiffies;
 373         unsigned long warning_timeout;
 374         bool displayed_warning;
 375
 376         displayed_warning = false;
 377         start_jiffies = jiffies;
 378         warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * PQI_HZ) + start_jiffies;
 379
 380         while (atomic_read(&ctrl_info->num_busy_threads) >
 381                 atomic_read(&ctrl_info->num_blocked_threads)) {
 382                 if (time_after(jiffies, warning_timeout)) {
 383                         dev_warn(&ctrl_info->pci_dev->dev,
 384                                 "waiting %u seconds for driver activity to quiesce\n",
 385                                 jiffies_to_msecs(jiffies - start_jiffies) / 1000);
 386                         displayed_warning = true;
 387                         warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * PQI_HZ) + jiffies;
 388                 }
 389                 usleep_range(1000, 2000);
 390         }
 391
 392         if (displayed_warning)
 393                 dev_warn(&ctrl_info->pci_dev->dev,
 394                         "driver activity quiesced after waiting for %u seconds\n",
 395                         jiffies_to_msecs(jiffies - start_jiffies) / 1000);
 396 }
 397
 398 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 399 {
 400         return device->device_offline;
 401 }
 402
 403 static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info)
 404 {
 405         mutex_lock(&ctrl_info->ofa_mutex);
 406 }
 407
 408 static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info)
 409 {
 410         mutex_unlock(&ctrl_info->ofa_mutex);
 411 }
 412
 413 static inline void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info)
 414 {
 415         mutex_lock(&ctrl_info->ofa_mutex);
 416         mutex_unlock(&ctrl_info->ofa_mutex);
 417 }
 418
 419 static inline bool pqi_ofa_in_progress(struct pqi_ctrl_info *ctrl_info)
 420 {
 421         return mutex_is_locked(&ctrl_info->ofa_mutex);
 422 }
 423
 424 static inline void pqi_device_remove_start(struct pqi_scsi_dev *device)
 425 {
 426         device->in_remove = true;
 427 }
 428
 429 static inline bool pqi_device_in_remove(struct pqi_scsi_dev *device)
 430 {
 431         return device->in_remove;
 432 }
 433
 434 static inline int pqi_event_type_to_event_index(unsigned int event_type)
 435 {
 436         int index;
 437
 438         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
 439                 if (event_type == pqi_supported_event_types[index])
 440                         return index;
 441
 442         return -1;
 443 }
 444
 445 static inline bool pqi_is_supported_event(unsigned int event_type)
 446 {
 447         return pqi_event_type_to_event_index(event_type) != -1;
 448 }
 449
 450 static inline void pqi_schedule_rescan_worker_with_delay(struct pqi_ctrl_info *ctrl_info,
 451         unsigned long delay)
 452 {
 453         if (pqi_ctrl_offline(ctrl_info))
 454                 return;
 455
 456         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 457 }
 458
 459 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 460 {
 461         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 462 }
 463
 464 #define PQI_RESCAN_WORK_DELAY   (10 * PQI_HZ)
 465
 466 static inline void pqi_schedule_rescan_worker_delayed(struct pqi_ctrl_info *ctrl_info)
 467 {
 468         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 469 }
 470
 471 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 472 {
 473         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 474 }
 475
 476 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 477 {
 478         if (!ctrl_info->heartbeat_counter)
 479                 return 0;
 480
 481         return readl(ctrl_info->heartbeat_counter);
 482 }
 483
 484 static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 485 {
 486         return readb(ctrl_info->soft_reset_status);
 487 }
 488
 489 static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 490 {
 491         u8 status;
 492
 493         status = pqi_read_soft_reset_status(ctrl_info);
 494         status &= ~PQI_SOFT_RESET_ABORT;
 495         writeb(status, ctrl_info->soft_reset_status);
 496 }
 497
 498 static int pqi_map_single(struct pci_dev *pci_dev,
 499         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 500         size_t buffer_length, enum dma_data_direction data_direction)
 501 {
 502         dma_addr_t bus_address;
 503
 504         if (!buffer || buffer_length == 0 || data_direction == DMA_NONE)
 505                 return 0;
 506
 507         bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length,
 508                 data_direction);
 509         if (dma_mapping_error(&pci_dev->dev, bus_address))
 510                 return -ENOMEM;
 511
 512         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 513         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 514         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 515
 516         return 0;
 517 }
 518
 519 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 520         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 521         enum dma_data_direction data_direction)
 522 {
 523         int i;
 524
 525         if (data_direction == DMA_NONE)
 526                 return;
 527
 528         for (i = 0; i < num_descriptors; i++)
 529                 dma_unmap_single(&pci_dev->dev,
 530                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 531                         get_unaligned_le32(&descriptors[i].length),
 532                         data_direction);
 533 }
 534
 535 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 536         struct pqi_raid_path_request *request, u8 cmd,
 537         u8 *scsi3addr, void *buffer, size_t buffer_length,
 538         u16 vpd_page, enum dma_data_direction *dir)
 539 {
 540         u8 *cdb;
 541         size_t cdb_length = buffer_length;
 542
 543         memset(request, 0, sizeof(*request));
 544
 545         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 546         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 547                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 548                 &request->header.iu_length);
 549         put_unaligned_le32(buffer_length, &request->buffer_length);
 550         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 551         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 552         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 553
 554         cdb = request->cdb;
 555
 556         switch (cmd) {
 557         case INQUIRY:
 558                 request->data_direction = SOP_READ_FLAG;
 559                 cdb[0] = INQUIRY;
 560                 if (vpd_page & VPD_PAGE) {
 561                         cdb[1] = 0x1;
 562                         cdb[2] = (u8)vpd_page;
 563                 }
 564                 cdb[4] = (u8)cdb_length;
 565                 break;
 566         case CISS_REPORT_LOG:
 567         case CISS_REPORT_PHYS:
 568                 request->data_direction = SOP_READ_FLAG;
 569                 cdb[0] = cmd;
 570                 if (cmd == CISS_REPORT_PHYS)
 571                         cdb[1] = CISS_REPORT_PHYS_FLAG_OTHER;
 572                 else
 573                         cdb[1] = ctrl_info->ciss_report_log_flags;
 574                 put_unaligned_be32(cdb_length, &cdb[6]);
 575                 break;
 576         case CISS_GET_RAID_MAP:
 577                 request->data_direction = SOP_READ_FLAG;
 578                 cdb[0] = CISS_READ;
 579                 cdb[1] = CISS_GET_RAID_MAP;
 580                 put_unaligned_be32(cdb_length, &cdb[6]);
 581                 break;
 582         case SA_FLUSH_CACHE:
 583                 request->header.driver_flags = PQI_DRIVER_NONBLOCKABLE_REQUEST;
 584                 request->data_direction = SOP_WRITE_FLAG;
 585                 cdb[0] = BMIC_WRITE;
 586                 cdb[6] = BMIC_FLUSH_CACHE;
 587                 put_unaligned_be16(cdb_length, &cdb[7]);
 588                 break;
 589         case BMIC_SENSE_DIAG_OPTIONS:
 590                 cdb_length = 0;
 591                 fallthrough;
 592         case BMIC_IDENTIFY_CONTROLLER:
 593         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 594         case BMIC_SENSE_SUBSYSTEM_INFORMATION:
 595         case BMIC_SENSE_FEATURE:
 596                 request->data_direction = SOP_READ_FLAG;
 597                 cdb[0] = BMIC_READ;
 598                 cdb[6] = cmd;
 599                 put_unaligned_be16(cdb_length, &cdb[7]);
 600                 break;
 601         case BMIC_SET_DIAG_OPTIONS:
 602                 cdb_length = 0;
 603                 fallthrough;
 604         case BMIC_WRITE_HOST_WELLNESS:
 605                 request->data_direction = SOP_WRITE_FLAG;
 606                 cdb[0] = BMIC_WRITE;
 607                 cdb[6] = cmd;
 608                 put_unaligned_be16(cdb_length, &cdb[7]);
 609                 break;
 610         case BMIC_CSMI_PASSTHRU:
 611                 request->data_direction = SOP_BIDIRECTIONAL;
 612                 cdb[0] = BMIC_WRITE;
 613                 cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU;
 614                 cdb[6] = cmd;
 615                 put_unaligned_be16(cdb_length, &cdb[7]);
 616                 break;
 617         default:
 618                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n", cmd);
 619                 break;
 620         }
 621
 622         switch (request->data_direction) {
 623         case SOP_READ_FLAG:
 624                 *dir = DMA_FROM_DEVICE;
 625                 break;
 626         case SOP_WRITE_FLAG:
 627                 *dir = DMA_TO_DEVICE;
 628                 break;
 629         case SOP_NO_DIRECTION_FLAG:
 630                 *dir = DMA_NONE;
 631                 break;
 632         default:
 633                 *dir = DMA_BIDIRECTIONAL;
 634                 break;
 635         }
 636
 637         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 638                 buffer, buffer_length, *dir);
 639 }
 640
 641 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 642 {
 643         io_request->scmd = NULL;
 644         io_request->status = 0;
 645         io_request->error_info = NULL;
 646         io_request->raid_bypass = false;
 647 }
 648
 649 static struct pqi_io_request *pqi_alloc_io_request(
 650         struct pqi_ctrl_info *ctrl_info)
 651 {
 652         struct pqi_io_request *io_request;
 653         u16 i = ctrl_info->next_io_request_slot;        /* benignly racy */
 654
 655         while (1) {
 656                 io_request = &ctrl_info->io_request_pool[i];
 657                 if (atomic_inc_return(&io_request->refcount) == 1)
 658                         break;
 659                 atomic_dec(&io_request->refcount);
 660                 i = (i + 1) % ctrl_info->max_io_slots;
 661         }
 662
 663         /* benignly racy */
 664         ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 665
 666         pqi_reinit_io_request(io_request);
 667
 668         return io_request;
 669 }
 670
 671 static void pqi_free_io_request(struct pqi_io_request *io_request)
 672 {
 673         atomic_dec(&io_request->refcount);
 674 }
 675
 676 static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 677         u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page,
 678         struct pqi_raid_error_info *error_info)
 679 {
 680         int rc;
 681         struct pqi_raid_path_request request;
 682         enum dma_data_direction dir;
 683
 684         rc = pqi_build_raid_path_request(ctrl_info, &request, cmd, scsi3addr,
 685                 buffer, buffer_length, vpd_page, &dir);
 686         if (rc)
 687                 return rc;
 688
 689         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, error_info);
 690
 691         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 692
 693         return rc;
 694 }
 695
 696 /* helper functions for pqi_send_scsi_raid_request */
 697
 698 static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info,
 699         u8 cmd, void *buffer, size_t buffer_length)
 700 {
 701         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 702                 buffer, buffer_length, 0, NULL);
 703 }
 704
 705 static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info,
 706         u8 cmd, void *buffer, size_t buffer_length,
 707         struct pqi_raid_error_info *error_info)
 708 {
 709         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 710                 buffer, buffer_length, 0, error_info);
 711 }
 712
 713 static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 714         struct bmic_identify_controller *buffer)
 715 {
 716         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER,
 717                 buffer, sizeof(*buffer));
 718 }
 719
 720 static inline int pqi_sense_subsystem_info(struct  pqi_ctrl_info *ctrl_info,
 721         struct bmic_sense_subsystem_info *sense_info)
 722 {
 723         return pqi_send_ctrl_raid_request(ctrl_info,
 724                 BMIC_SENSE_SUBSYSTEM_INFORMATION, sense_info,
 725                 sizeof(*sense_info));
 726 }
 727
 728 static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 729         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 730 {
 731         return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr,
 732                 buffer, buffer_length, vpd_page, NULL);
 733 }
 734
 735 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 736         struct pqi_scsi_dev *device,
 737         struct bmic_identify_physical_device *buffer, size_t buffer_length)
 738 {
 739         int rc;
 740         enum dma_data_direction dir;
 741         u16 bmic_device_index;
 742         struct pqi_raid_path_request request;
 743
 744         rc = pqi_build_raid_path_request(ctrl_info, &request,
 745                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 746                 buffer_length, 0, &dir);
 747         if (rc)
 748                 return rc;
 749
 750         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 751         request.cdb[2] = (u8)bmic_device_index;
 752         request.cdb[9] = (u8)(bmic_device_index >> 8);
 753
 754         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
 755
 756         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 757
 758         return rc;
 759 }
 760
 761 static inline u32 pqi_aio_limit_to_bytes(__le16 *limit)
 762 {
 763         u32 bytes;
 764
 765         bytes = get_unaligned_le16(limit);
 766         if (bytes == 0)
 767                 bytes = ~0;
 768         else
 769                 bytes *= 1024;
 770
 771         return bytes;
 772 }
 773
 774 #pragma pack(1)
 775
 776 struct bmic_sense_feature_buffer {
 777         struct bmic_sense_feature_buffer_header header;
 778         struct bmic_sense_feature_io_page_aio_subpage aio_subpage;
 779 };
 780
 781 #pragma pack()
 782
 783 #define MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH       \
 784         offsetofend(struct bmic_sense_feature_buffer, \
 785                 aio_subpage.max_write_raid_1_10_3drive)
 786
 787 #define MINIMUM_AIO_SUBPAGE_LENGTH      \
 788         (offsetofend(struct bmic_sense_feature_io_page_aio_subpage, \
 789                 max_write_raid_1_10_3drive) - \
 790                 sizeof_field(struct bmic_sense_feature_io_page_aio_subpage, header))
 791
 792 static int pqi_get_advanced_raid_bypass_config(struct pqi_ctrl_info *ctrl_info)
 793 {
 794         int rc;
 795         enum dma_data_direction dir;
 796         struct pqi_raid_path_request request;
 797         struct bmic_sense_feature_buffer *buffer;
 798
 799         buffer = kmalloc(sizeof(*buffer), GFP_KERNEL);
 800         if (!buffer)
 801                 return -ENOMEM;
 802
 803         rc = pqi_build_raid_path_request(ctrl_info, &request, BMIC_SENSE_FEATURE, RAID_CTLR_LUNID,
 804                 buffer, sizeof(*buffer), 0, &dir);
 805         if (rc)
 806                 goto error;
 807
 808         request.cdb[2] = BMIC_SENSE_FEATURE_IO_PAGE;
 809         request.cdb[3] = BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE;
 810
 811         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
 812
 813         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 814
 815         if (rc)
 816                 goto error;
 817
 818         if (buffer->header.page_code != BMIC_SENSE_FEATURE_IO_PAGE ||
 819                 buffer->header.subpage_code !=
 820                         BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
 821                 get_unaligned_le16(&buffer->header.buffer_length) <
 822                         MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH ||
 823                 buffer->aio_subpage.header.page_code !=
 824                         BMIC_SENSE_FEATURE_IO_PAGE ||
 825                 buffer->aio_subpage.header.subpage_code !=
 826                         BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
 827                 get_unaligned_le16(&buffer->aio_subpage.header.page_length) <
 828                         MINIMUM_AIO_SUBPAGE_LENGTH) {
 829                 goto error;
 830         }
 831
 832         ctrl_info->max_transfer_encrypted_sas_sata =
 833                 pqi_aio_limit_to_bytes(
 834                         &buffer->aio_subpage.max_transfer_encrypted_sas_sata);
 835
 836         ctrl_info->max_transfer_encrypted_nvme =
 837                 pqi_aio_limit_to_bytes(
 838                         &buffer->aio_subpage.max_transfer_encrypted_nvme);
 839
 840         ctrl_info->max_write_raid_5_6 =
 841                 pqi_aio_limit_to_bytes(
 842                         &buffer->aio_subpage.max_write_raid_5_6);
 843
 844         ctrl_info->max_write_raid_1_10_2drive =
 845                 pqi_aio_limit_to_bytes(
 846                         &buffer->aio_subpage.max_write_raid_1_10_2drive);
 847
 848         ctrl_info->max_write_raid_1_10_3drive =
 849                 pqi_aio_limit_to_bytes(
 850                         &buffer->aio_subpage.max_write_raid_1_10_3drive);
 851
 852 error:
 853         kfree(buffer);
 854
 855         return rc;
 856 }
 857
 858 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 859         enum bmic_flush_cache_shutdown_event shutdown_event)
 860 {
 861         int rc;
 862         struct bmic_flush_cache *flush_cache;
 863
 864         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 865         if (!flush_cache)
 866                 return -ENOMEM;
 867
 868         flush_cache->shutdown_event = shutdown_event;
 869
 870         rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache,
 871                 sizeof(*flush_cache));
 872
 873         kfree(flush_cache);
 874
 875         return rc;
 876 }
 877
 878 int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info,
 879         struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length,
 880         struct pqi_raid_error_info *error_info)
 881 {
 882         return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU,
 883                 buffer, buffer_length, error_info);
 884 }
 885
 886 #define PQI_FETCH_PTRAID_DATA           (1 << 31)
 887
 888 static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info)
 889 {
 890         int rc;
 891         struct bmic_diag_options *diag;
 892
 893         diag = kzalloc(sizeof(*diag), GFP_KERNEL);
 894         if (!diag)
 895                 return -ENOMEM;
 896
 897         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS,
 898                 diag, sizeof(*diag));
 899         if (rc)
 900                 goto out;
 901
 902         diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA);
 903
 904         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS, diag,
 905                 sizeof(*diag));
 906
 907 out:
 908         kfree(diag);
 909
 910         return rc;
 911 }
 912
 913 static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 914         void *buffer, size_t buffer_length)
 915 {
 916         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS,
 917                 buffer, buffer_length);
 918 }
 919
 920 #pragma pack(1)
 921
 922 struct bmic_host_wellness_driver_version {
 923         u8      start_tag[4];
 924         u8      driver_version_tag[2];
 925         __le16  driver_version_length;
 926         char    driver_version[32];
 927         u8      dont_write_tag[2];
 928         u8      end_tag[2];
 929 };
 930
 931 #pragma pack()
 932
 933 static int pqi_write_driver_version_to_host_wellness(
 934         struct pqi_ctrl_info *ctrl_info)
 935 {
 936         int rc;
 937         struct bmic_host_wellness_driver_version *buffer;
 938         size_t buffer_length;
 939
 940         buffer_length = sizeof(*buffer);
 941
 942         buffer = kmalloc(buffer_length, GFP_KERNEL);
 943         if (!buffer)
 944                 return -ENOMEM;
 945
 946         buffer->start_tag[0] = '<';
 947         buffer->start_tag[1] = 'H';
 948         buffer->start_tag[2] = 'W';
 949         buffer->start_tag[3] = '>';
 950         buffer->driver_version_tag[0] = 'D';
 951         buffer->driver_version_tag[1] = 'V';
 952         put_unaligned_le16(sizeof(buffer->driver_version),
 953                 &buffer->driver_version_length);
 954         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 955                 sizeof(buffer->driver_version) - 1);
 956         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 957         buffer->dont_write_tag[0] = 'D';
 958         buffer->dont_write_tag[1] = 'W';
 959         buffer->end_tag[0] = 'Z';
 960         buffer->end_tag[1] = 'Z';
 961
 962         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 963
 964         kfree(buffer);
 965
 966         return rc;
 967 }
 968
 969 #pragma pack(1)
 970
 971 struct bmic_host_wellness_time {
 972         u8      start_tag[4];
 973         u8      time_tag[2];
 974         __le16  time_length;
 975         u8      time[8];
 976         u8      dont_write_tag[2];
 977         u8      end_tag[2];
 978 };
 979
 980 #pragma pack()
 981
 982 static int pqi_write_current_time_to_host_wellness(
 983         struct pqi_ctrl_info *ctrl_info)
 984 {
 985         int rc;
 986         struct bmic_host_wellness_time *buffer;
 987         size_t buffer_length;
 988         time64_t local_time;
 989         unsigned int year;
 990         struct tm tm;
 991
 992         buffer_length = sizeof(*buffer);
 993
 994         buffer = kmalloc(buffer_length, GFP_KERNEL);
 995         if (!buffer)
 996                 return -ENOMEM;
 997
 998         buffer->start_tag[0] = '<';
 999         buffer->start_tag[1] = 'H';
1000         buffer->start_tag[2] = 'W';
1001         buffer->start_tag[3] = '>';
1002         buffer->time_tag[0] = 'T';
1003         buffer->time_tag[1] = 'D';
1004         put_unaligned_le16(sizeof(buffer->time),
1005                 &buffer->time_length);
1006
1007         local_time = ktime_get_real_seconds();
1008         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
1009         year = tm.tm_year + 1900;
1010
1011         buffer->time[0] = bin2bcd(tm.tm_hour);
1012         buffer->time[1] = bin2bcd(tm.tm_min);
1013         buffer->time[2] = bin2bcd(tm.tm_sec);
1014         buffer->time[3] = 0;
1015         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
1016         buffer->time[5] = bin2bcd(tm.tm_mday);
1017         buffer->time[6] = bin2bcd(year / 100);
1018         buffer->time[7] = bin2bcd(year % 100);
1019
1020         buffer->dont_write_tag[0] = 'D';
1021         buffer->dont_write_tag[1] = 'W';
1022         buffer->end_tag[0] = 'Z';
1023         buffer->end_tag[1] = 'Z';
1024
1025         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
1026
1027         kfree(buffer);
1028
1029         return rc;
1030 }
1031
1032 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * PQI_HZ)
1033
1034 static void pqi_update_time_worker(struct work_struct *work)
1035 {
1036         int rc;
1037         struct pqi_ctrl_info *ctrl_info;
1038
1039         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1040                 update_time_work);
1041
1042         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
1043         if (rc)
1044                 dev_warn(&ctrl_info->pci_dev->dev,
1045                         "error updating time on controller\n");
1046
1047         schedule_delayed_work(&ctrl_info->update_time_work,
1048                 PQI_UPDATE_TIME_WORK_INTERVAL);
1049 }
1050
1051 static inline void pqi_schedule_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1052 {
1053         schedule_delayed_work(&ctrl_info->update_time_work, 0);
1054 }
1055
1056 static inline void pqi_cancel_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1057 {
1058         cancel_delayed_work_sync(&ctrl_info->update_time_work);
1059 }
1060
1061 static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void *buffer,
1062         size_t buffer_length)
1063 {
1064         return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer, buffer_length);
1065 }
1066
1067 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void **buffer)
1068 {
1069         int rc;
1070         size_t lun_list_length;
1071         size_t lun_data_length;
1072         size_t new_lun_list_length;
1073         void *lun_data = NULL;
1074         struct report_lun_header *report_lun_header;
1075
1076         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
1077         if (!report_lun_header) {
1078                 rc = -ENOMEM;
1079                 goto out;
1080         }
1081
1082         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header, sizeof(*report_lun_header));
1083         if (rc)
1084                 goto out;
1085
1086         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
1087
1088 again:
1089         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
1090
1091         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
1092         if (!lun_data) {
1093                 rc = -ENOMEM;
1094                 goto out;
1095         }
1096
1097         if (lun_list_length == 0) {
1098                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
1099                 goto out;
1100         }
1101
1102         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
1103         if (rc)
1104                 goto out;
1105
1106         new_lun_list_length =
1107                 get_unaligned_be32(&((struct report_lun_header *)lun_data)->list_length);
1108
1109         if (new_lun_list_length > lun_list_length) {
1110                 lun_list_length = new_lun_list_length;
1111                 kfree(lun_data);
1112                 goto again;
1113         }
1114
1115 out:
1116         kfree(report_lun_header);
1117
1118         if (rc) {
1119                 kfree(lun_data);
1120                 lun_data = NULL;
1121         }
1122
1123         *buffer = lun_data;
1124
1125         return rc;
1126 }
1127
1128 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1129 {
1130         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS, buffer);
1131 }
1132
1133 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1134 {
1135         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
1136 }
1137
1138 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
1139         struct report_phys_lun_extended **physdev_list,
1140         struct report_log_lun_extended **logdev_list)
1141 {
1142         int rc;
1143         size_t logdev_list_length;
1144         size_t logdev_data_length;
1145         struct report_log_lun_extended *internal_logdev_list;
1146         struct report_log_lun_extended *logdev_data;
1147         struct report_lun_header report_lun_header;
1148
1149         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
1150         if (rc)
1151                 dev_err(&ctrl_info->pci_dev->dev,
1152                         "report physical LUNs failed\n");
1153
1154         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
1155         if (rc)
1156                 dev_err(&ctrl_info->pci_dev->dev,
1157                         "report logical LUNs failed\n");
1158
1159         /*
1160          * Tack the controller itself onto the end of the logical device list.
1161          */
1162
1163         logdev_data = *logdev_list;
1164
1165         if (logdev_data) {
1166                 logdev_list_length =
1167                         get_unaligned_be32(&logdev_data->header.list_length);
1168         } else {
1169                 memset(&report_lun_header, 0, sizeof(report_lun_header));
1170                 logdev_data =
1171                         (struct report_log_lun_extended *)&report_lun_header;
1172                 logdev_list_length = 0;
1173         }
1174
1175         logdev_data_length = sizeof(struct report_lun_header) +
1176                 logdev_list_length;
1177
1178         internal_logdev_list = kmalloc(logdev_data_length +
1179                 sizeof(struct report_log_lun_extended), GFP_KERNEL);
1180         if (!internal_logdev_list) {
1181                 kfree(*logdev_list);
1182                 *logdev_list = NULL;
1183                 return -ENOMEM;
1184         }
1185
1186         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
1187         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
1188                 sizeof(struct report_log_lun_extended_entry));
1189         put_unaligned_be32(logdev_list_length +
1190                 sizeof(struct report_log_lun_extended_entry),
1191                 &internal_logdev_list->header.list_length);
1192
1193         kfree(*logdev_list);
1194         *logdev_list = internal_logdev_list;
1195
1196         return 0;
1197 }
1198
1199 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
1200         int bus, int target, int lun)
1201 {
1202         device->bus = bus;
1203         device->target = target;
1204         device->lun = lun;
1205 }
1206
1207 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
1208 {
1209         u8 *scsi3addr;
1210         u32 lunid;
1211         int bus;
1212         int target;
1213         int lun;
1214
1215         scsi3addr = device->scsi3addr;
1216         lunid = get_unaligned_le32(scsi3addr);
1217
1218         if (pqi_is_hba_lunid(scsi3addr)) {
1219                 /* The specified device is the controller. */
1220                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
1221                 device->target_lun_valid = true;
1222                 return;
1223         }
1224
1225         if (pqi_is_logical_device(device)) {
1226                 if (device->is_external_raid_device) {
1227                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
1228                         target = (lunid >> 16) & 0x3fff;
1229                         lun = lunid & 0xff;
1230                 } else {
1231                         bus = PQI_RAID_VOLUME_BUS;
1232                         target = 0;
1233                         lun = lunid & 0x3fff;
1234                 }
1235                 pqi_set_bus_target_lun(device, bus, target, lun);
1236                 device->target_lun_valid = true;
1237                 return;
1238         }
1239
1240         /*
1241          * Defer target and LUN assignment for non-controller physical devices
1242          * because the SAS transport layer will make these assignments later.
1243          */
1244         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
1245 }
1246
1247 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
1248         struct pqi_scsi_dev *device)
1249 {
1250         int rc;
1251         u8 raid_level;
1252         u8 *buffer;
1253
1254         raid_level = SA_RAID_UNKNOWN;
1255
1256         buffer = kmalloc(64, GFP_KERNEL);
1257         if (buffer) {
1258                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1259                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1260                 if (rc == 0) {
1261                         raid_level = buffer[8];
1262                         if (raid_level > SA_RAID_MAX)
1263                                 raid_level = SA_RAID_UNKNOWN;
1264                 }
1265                 kfree(buffer);
1266         }
1267
1268         device->raid_level = raid_level;
1269 }
1270
1271 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1272         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1273 {
1274         char *err_msg;
1275         u32 raid_map_size;
1276         u32 r5or6_blocks_per_row;
1277
1278         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1279
1280         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1281                 err_msg = "RAID map too small";
1282                 goto bad_raid_map;
1283         }
1284
1285         if (device->raid_level == SA_RAID_1) {
1286                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1287                         err_msg = "invalid RAID-1 map";
1288                         goto bad_raid_map;
1289                 }
1290         } else if (device->raid_level == SA_RAID_TRIPLE) {
1291                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1292                         err_msg = "invalid RAID-1(Triple) map";
1293                         goto bad_raid_map;
1294                 }
1295         } else if ((device->raid_level == SA_RAID_5 ||
1296                 device->raid_level == SA_RAID_6) &&
1297                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1298                 /* RAID 50/60 */
1299                 r5or6_blocks_per_row =
1300                         get_unaligned_le16(&raid_map->strip_size) *
1301                         get_unaligned_le16(&raid_map->data_disks_per_row);
1302                 if (r5or6_blocks_per_row == 0) {
1303                         err_msg = "invalid RAID-5 or RAID-6 map";
1304                         goto bad_raid_map;
1305                 }
1306         }
1307
1308         return 0;
1309
1310 bad_raid_map:
1311         dev_warn(&ctrl_info->pci_dev->dev,
1312                 "logical device %08x%08x %s\n",
1313                 *((u32 *)&device->scsi3addr),
1314                 *((u32 *)&device->scsi3addr[4]), err_msg);
1315
1316         return -EINVAL;
1317 }
1318
1319 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1320         struct pqi_scsi_dev *device)
1321 {
1322         int rc;
1323         u32 raid_map_size;
1324         struct raid_map *raid_map;
1325
1326         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1327         if (!raid_map)
1328                 return -ENOMEM;
1329
1330         rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1331                 device->scsi3addr, raid_map, sizeof(*raid_map), 0, NULL);
1332         if (rc)
1333                 goto error;
1334
1335         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1336
1337         if (raid_map_size > sizeof(*raid_map)) {
1338
1339                 kfree(raid_map);
1340
1341                 raid_map = kmalloc(raid_map_size, GFP_KERNEL);
1342                 if (!raid_map)
1343                         return -ENOMEM;
1344
1345                 rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1346                         device->scsi3addr, raid_map, raid_map_size, 0, NULL);
1347                 if (rc)
1348                         goto error;
1349
1350                 if (get_unaligned_le32(&raid_map->structure_size)
1351                         != raid_map_size) {
1352                         dev_warn(&ctrl_info->pci_dev->dev,
1353                                 "requested %u bytes, received %u bytes\n",
1354                                 raid_map_size,
1355                                 get_unaligned_le32(&raid_map->structure_size));
1356                         rc = -EINVAL;
1357                         goto error;
1358                 }
1359         }
1360
1361         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1362         if (rc)
1363                 goto error;
1364
1365         device->raid_map = raid_map;
1366
1367         return 0;
1368
1369 error:
1370         kfree(raid_map);
1371
1372         return rc;
1373 }
1374
1375 static void pqi_set_max_transfer_encrypted(struct pqi_ctrl_info *ctrl_info,
1376         struct pqi_scsi_dev *device)
1377 {
1378         if (!ctrl_info->lv_drive_type_mix_valid) {
1379                 device->max_transfer_encrypted = ~0;
1380                 return;
1381         }
1382
1383         switch (LV_GET_DRIVE_TYPE_MIX(device->scsi3addr)) {
1384         case LV_DRIVE_TYPE_MIX_SAS_HDD_ONLY:
1385         case LV_DRIVE_TYPE_MIX_SATA_HDD_ONLY:
1386         case LV_DRIVE_TYPE_MIX_SAS_OR_SATA_SSD_ONLY:
1387         case LV_DRIVE_TYPE_MIX_SAS_SSD_ONLY:
1388         case LV_DRIVE_TYPE_MIX_SATA_SSD_ONLY:
1389         case LV_DRIVE_TYPE_MIX_SAS_ONLY:
1390         case LV_DRIVE_TYPE_MIX_SATA_ONLY:
1391                 device->max_transfer_encrypted =
1392                         ctrl_info->max_transfer_encrypted_sas_sata;
1393                 break;
1394         case LV_DRIVE_TYPE_MIX_NVME_ONLY:
1395                 device->max_transfer_encrypted =
1396                         ctrl_info->max_transfer_encrypted_nvme;
1397                 break;
1398         case LV_DRIVE_TYPE_MIX_UNKNOWN:
1399         case LV_DRIVE_TYPE_MIX_NO_RESTRICTION:
1400         default:
1401                 device->max_transfer_encrypted =
1402                         min(ctrl_info->max_transfer_encrypted_sas_sata,
1403                                 ctrl_info->max_transfer_encrypted_nvme);
1404                 break;
1405         }
1406 }
1407
1408 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1409         struct pqi_scsi_dev *device)
1410 {
1411         int rc;
1412         u8 *buffer;
1413         u8 bypass_status;
1414
1415         buffer = kmalloc(64, GFP_KERNEL);
1416         if (!buffer)
1417                 return;
1418
1419         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1420                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1421         if (rc)
1422                 goto out;
1423
1424 #define RAID_BYPASS_STATUS              4
1425 #define RAID_BYPASS_CONFIGURED          0x1
1426 #define RAID_BYPASS_ENABLED             0x2
1427
1428         bypass_status = buffer[RAID_BYPASS_STATUS];
1429         device->raid_bypass_configured =
1430                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1431         if (device->raid_bypass_configured &&
1432                 (bypass_status & RAID_BYPASS_ENABLED) &&
1433                 pqi_get_raid_map(ctrl_info, device) == 0) {
1434                 device->raid_bypass_enabled = true;
1435                 if (get_unaligned_le16(&device->raid_map->flags) &
1436                         RAID_MAP_ENCRYPTION_ENABLED)
1437                         pqi_set_max_transfer_encrypted(ctrl_info, device);
1438         }
1439
1440 out:
1441         kfree(buffer);
1442 }
1443
1444 /*
1445  * Use vendor-specific VPD to determine online/offline status of a volume.
1446  */
1447
1448 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1449         struct pqi_scsi_dev *device)
1450 {
1451         int rc;
1452         size_t page_length;
1453         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1454         bool volume_offline = true;
1455         u32 volume_flags;
1456         struct ciss_vpd_logical_volume_status *vpd;
1457
1458         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1459         if (!vpd)
1460                 goto no_buffer;
1461
1462         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1463                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1464         if (rc)
1465                 goto out;
1466
1467         if (vpd->page_code != CISS_VPD_LV_STATUS)
1468                 goto out;
1469
1470         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1471                 volume_status) + vpd->page_length;
1472         if (page_length < sizeof(*vpd))
1473                 goto out;
1474
1475         volume_status = vpd->volume_status;
1476         volume_flags = get_unaligned_be32(&vpd->flags);
1477         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1478
1479 out:
1480         kfree(vpd);
1481 no_buffer:
1482         device->volume_status = volume_status;
1483         device->volume_offline = volume_offline;
1484 }
1485
1486 #define PQI_DEVICE_PHY_MAP_SUPPORTED    0x10
1487
1488 static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info,
1489         struct pqi_scsi_dev *device,
1490         struct bmic_identify_physical_device *id_phys)
1491 {
1492         int rc;
1493
1494         memset(id_phys, 0, sizeof(*id_phys));
1495
1496         rc = pqi_identify_physical_device(ctrl_info, device,
1497                 id_phys, sizeof(*id_phys));
1498         if (rc) {
1499                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1500                 return rc;
1501         }
1502
1503         scsi_sanitize_inquiry_string(&id_phys->model[0], 8);
1504         scsi_sanitize_inquiry_string(&id_phys->model[8], 16);
1505
1506         memcpy(device->vendor, &id_phys->model[0], sizeof(device->vendor));
1507         memcpy(device->model, &id_phys->model[8], sizeof(device->model));
1508
1509         device->box_index = id_phys->box_index;
1510         device->phys_box_on_bus = id_phys->phys_box_on_bus;
1511         device->phy_connected_dev_type = id_phys->phy_connected_dev_type[0];
1512         device->queue_depth =
1513                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1514         device->active_path_index = id_phys->active_path_number;
1515         device->path_map = id_phys->redundant_path_present_map;
1516         memcpy(&device->box,
1517                 &id_phys->alternate_paths_phys_box_on_port,
1518                 sizeof(device->box));
1519         memcpy(&device->phys_connector,
1520                 &id_phys->alternate_paths_phys_connector,
1521                 sizeof(device->phys_connector));
1522         device->bay = id_phys->phys_bay_in_box;
1523
1524         memcpy(&device->page_83_identifier, &id_phys->page_83_identifier,
1525                 sizeof(device->page_83_identifier));
1526
1527         if ((id_phys->even_more_flags & PQI_DEVICE_PHY_MAP_SUPPORTED) &&
1528                 id_phys->phy_count)
1529                 device->phy_id =
1530                         id_phys->phy_to_phy_map[device->active_path_index];
1531         else
1532                 device->phy_id = 0xFF;
1533
1534         return 0;
1535 }
1536
1537 static int pqi_get_logical_device_info(struct pqi_ctrl_info *ctrl_info,
1538         struct pqi_scsi_dev *device)
1539 {
1540         int rc;
1541         u8 *buffer;
1542
1543         buffer = kmalloc(64, GFP_KERNEL);
1544         if (!buffer)
1545                 return -ENOMEM;
1546
1547         /* Send an inquiry to the device to see what it is. */
1548         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1549         if (rc)
1550                 goto out;
1551
1552         scsi_sanitize_inquiry_string(&buffer[8], 8);
1553         scsi_sanitize_inquiry_string(&buffer[16], 16);
1554
1555         device->devtype = buffer[0] & 0x1f;
1556         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1557         memcpy(device->model, &buffer[16], sizeof(device->model));
1558
1559         if (device->devtype == TYPE_DISK) {
1560                 if (device->is_external_raid_device) {
1561                         device->raid_level = SA_RAID_UNKNOWN;
1562                         device->volume_status = CISS_LV_OK;
1563                         device->volume_offline = false;
1564                 } else {
1565                         pqi_get_raid_level(ctrl_info, device);
1566                         pqi_get_raid_bypass_status(ctrl_info, device);
1567                         pqi_get_volume_status(ctrl_info, device);
1568                 }
1569         }
1570
1571 out:
1572         kfree(buffer);
1573
1574         return rc;
1575 }
1576
1577 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1578         struct pqi_scsi_dev *device,
1579         struct bmic_identify_physical_device *id_phys)
1580 {
1581         int rc;
1582
1583         if (device->is_expander_smp_device)
1584                 return 0;
1585
1586         if (pqi_is_logical_device(device))
1587                 rc = pqi_get_logical_device_info(ctrl_info, device);
1588         else
1589                 rc = pqi_get_physical_device_info(ctrl_info, device, id_phys);
1590
1591         return rc;
1592 }
1593
1594 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1595         struct pqi_scsi_dev *device)
1596 {
1597         char *status;
1598         static const char unknown_state_str[] =
1599                 "Volume is in an unknown state (%u)";
1600         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1601
1602         switch (device->volume_status) {
1603         case CISS_LV_OK:
1604                 status = "Volume online";
1605                 break;
1606         case CISS_LV_FAILED:
1607                 status = "Volume failed";
1608                 break;
1609         case CISS_LV_NOT_CONFIGURED:
1610                 status = "Volume not configured";
1611                 break;
1612         case CISS_LV_DEGRADED:
1613                 status = "Volume degraded";
1614                 break;
1615         case CISS_LV_READY_FOR_RECOVERY:
1616                 status = "Volume ready for recovery operation";
1617                 break;
1618         case CISS_LV_UNDERGOING_RECOVERY:
1619                 status = "Volume undergoing recovery";
1620                 break;
1621         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1622                 status = "Wrong physical drive was replaced";
1623                 break;
1624         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1625                 status = "A physical drive not properly connected";
1626                 break;
1627         case CISS_LV_HARDWARE_OVERHEATING:
1628                 status = "Hardware is overheating";
1629                 break;
1630         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1631                 status = "Hardware has overheated";
1632                 break;
1633         case CISS_LV_UNDERGOING_EXPANSION:
1634                 status = "Volume undergoing expansion";
1635                 break;
1636         case CISS_LV_NOT_AVAILABLE:
1637                 status = "Volume waiting for transforming volume";
1638                 break;
1639         case CISS_LV_QUEUED_FOR_EXPANSION:
1640                 status = "Volume queued for expansion";
1641                 break;
1642         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1643                 status = "Volume disabled due to SCSI ID conflict";
1644                 break;
1645         case CISS_LV_EJECTED:
1646                 status = "Volume has been ejected";
1647                 break;
1648         case CISS_LV_UNDERGOING_ERASE:
1649                 status = "Volume undergoing background erase";
1650                 break;
1651         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1652                 status = "Volume ready for predictive spare rebuild";
1653                 break;
1654         case CISS_LV_UNDERGOING_RPI:
1655                 status = "Volume undergoing rapid parity initialization";
1656                 break;
1657         case CISS_LV_PENDING_RPI:
1658                 status = "Volume queued for rapid parity initialization";
1659                 break;
1660         case CISS_LV_ENCRYPTED_NO_KEY:
1661                 status = "Encrypted volume inaccessible - key not present";
1662                 break;
1663         case CISS_LV_UNDERGOING_ENCRYPTION:
1664                 status = "Volume undergoing encryption process";
1665                 break;
1666         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1667                 status = "Volume undergoing encryption re-keying process";
1668                 break;
1669         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1670                 status = "Volume encrypted but encryption is disabled";
1671                 break;
1672         case CISS_LV_PENDING_ENCRYPTION:
1673                 status = "Volume pending migration to encrypted state";
1674                 break;
1675         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1676                 status = "Volume pending encryption rekeying";
1677                 break;
1678         case CISS_LV_NOT_SUPPORTED:
1679                 status = "Volume not supported on this controller";
1680                 break;
1681         case CISS_LV_STATUS_UNAVAILABLE:
1682                 status = "Volume status not available";
1683                 break;
1684         default:
1685                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1686                         unknown_state_str, device->volume_status);
1687                 status = unknown_state_buffer;
1688                 break;
1689         }
1690
1691         dev_info(&ctrl_info->pci_dev->dev,
1692                 "scsi %d:%d:%d:%d %s\n",
1693                 ctrl_info->scsi_host->host_no,
1694                 device->bus, device->target, device->lun, status);
1695 }
1696
1697 static void pqi_rescan_worker(struct work_struct *work)
1698 {
1699         struct pqi_ctrl_info *ctrl_info;
1700
1701         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1702                 rescan_work);
1703
1704         pqi_scan_scsi_devices(ctrl_info);
1705 }
1706
1707 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1708         struct pqi_scsi_dev *device)
1709 {
1710         int rc;
1711
1712         if (pqi_is_logical_device(device))
1713                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1714                         device->target, device->lun);
1715         else
1716                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1717
1718         return rc;
1719 }
1720
1721 #define PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS      (20 * 1000)
1722
1723 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
1724 {
1725         int rc;
1726
1727         pqi_device_remove_start(device);
1728
1729         rc = pqi_device_wait_for_pending_io(ctrl_info, device,
1730                 PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS);
1731         if (rc)
1732                 dev_err(&ctrl_info->pci_dev->dev,
1733                         "scsi %d:%d:%d:%d removing device with %d outstanding command(s)\n",
1734                         ctrl_info->scsi_host->host_no, device->bus,
1735                         device->target, device->lun,
1736                         atomic_read(&device->scsi_cmds_outstanding));
1737
1738         if (pqi_is_logical_device(device))
1739                 scsi_remove_device(device->sdev);
1740         else
1741                 pqi_remove_sas_device(device);
1742 }
1743
1744 /* Assumes the SCSI device list lock is held. */
1745
1746 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1747         int bus, int target, int lun)
1748 {
1749         struct pqi_scsi_dev *device;
1750
1751         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
1752                 if (device->bus == bus && device->target == target && device->lun == lun)
1753                         return device;
1754
1755         return NULL;
1756 }
1757
1758 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1, struct pqi_scsi_dev *dev2)
1759 {
1760         if (dev1->is_physical_device != dev2->is_physical_device)
1761                 return false;
1762
1763         if (dev1->is_physical_device)
1764                 return dev1->wwid == dev2->wwid;
1765
1766         return memcmp(dev1->volume_id, dev2->volume_id, sizeof(dev1->volume_id)) == 0;
1767 }
1768
1769 enum pqi_find_result {
1770         DEVICE_NOT_FOUND,
1771         DEVICE_CHANGED,
1772         DEVICE_SAME,
1773 };
1774
1775 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1776         struct pqi_scsi_dev *device_to_find, struct pqi_scsi_dev **matching_device)
1777 {
1778         struct pqi_scsi_dev *device;
1779
1780         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
1781                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr, device->scsi3addr)) {
1782                         *matching_device = device;
1783                         if (pqi_device_equal(device_to_find, device)) {
1784                                 if (device_to_find->volume_offline)
1785                                         return DEVICE_CHANGED;
1786                                 return DEVICE_SAME;
1787                         }
1788                         return DEVICE_CHANGED;
1789                 }
1790         }
1791
1792         return DEVICE_NOT_FOUND;
1793 }
1794
1795 static inline const char *pqi_device_type(struct pqi_scsi_dev *device)
1796 {
1797         if (device->is_expander_smp_device)
1798                 return "Enclosure SMP    ";
1799
1800         return scsi_device_type(device->devtype);
1801 }
1802
1803 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1804
1805 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1806         char *action, struct pqi_scsi_dev *device)
1807 {
1808         ssize_t count;
1809         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1810
1811         count = scnprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1812                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1813
1814         if (device->target_lun_valid)
1815                 count += scnprintf(buffer + count,
1816                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1817                         "%d:%d",
1818                         device->target,
1819                         device->lun);
1820         else
1821                 count += scnprintf(buffer + count,
1822                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1823                         "-:-");
1824
1825         if (pqi_is_logical_device(device))
1826                 count += scnprintf(buffer + count,
1827                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1828                         " %08x%08x",
1829                         *((u32 *)&device->scsi3addr),
1830                         *((u32 *)&device->scsi3addr[4]));
1831         else
1832                 count += scnprintf(buffer + count,
1833                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1834                         " %016llx", device->sas_address);
1835
1836         count += scnprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1837                 " %s %.8s %.16s ",
1838                 pqi_device_type(device),
1839                 device->vendor,
1840                 device->model);
1841
1842         if (pqi_is_logical_device(device)) {
1843                 if (device->devtype == TYPE_DISK)
1844                         count += scnprintf(buffer + count,
1845                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1846                                 "SSDSmartPathCap%c En%c %-12s",
1847                                 device->raid_bypass_configured ? '+' : '-',
1848                                 device->raid_bypass_enabled ? '+' : '-',
1849                                 pqi_raid_level_to_string(device->raid_level));
1850         } else {
1851                 count += scnprintf(buffer + count,
1852                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1853                         "AIO%c", device->aio_enabled ? '+' : '-');
1854                 if (device->devtype == TYPE_DISK ||
1855                         device->devtype == TYPE_ZBC)
1856                         count += scnprintf(buffer + count,
1857                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1858                                 " qd=%-6d", device->queue_depth);
1859         }
1860
1861         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
1862 }
1863
1864 /* Assumes the SCSI device list lock is held. */
1865
1866 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1867         struct pqi_scsi_dev *new_device)
1868 {
1869         existing_device->device_type = new_device->device_type;
1870         existing_device->bus = new_device->bus;
1871         if (new_device->target_lun_valid) {
1872                 existing_device->target = new_device->target;
1873                 existing_device->lun = new_device->lun;
1874                 existing_device->target_lun_valid = true;
1875         }
1876
1877         if ((existing_device->volume_status == CISS_LV_QUEUED_FOR_EXPANSION ||
1878                 existing_device->volume_status == CISS_LV_UNDERGOING_EXPANSION) &&
1879                 new_device->volume_status == CISS_LV_OK)
1880                 existing_device->rescan = true;
1881
1882         /* By definition, the scsi3addr and wwid fields are already the same. */
1883
1884         existing_device->is_physical_device = new_device->is_physical_device;
1885         existing_device->is_external_raid_device =
1886                 new_device->is_external_raid_device;
1887         existing_device->is_expander_smp_device =
1888                 new_device->is_expander_smp_device;
1889         existing_device->aio_enabled = new_device->aio_enabled;
1890         memcpy(existing_device->vendor, new_device->vendor,
1891                 sizeof(existing_device->vendor));
1892         memcpy(existing_device->model, new_device->model,
1893                 sizeof(existing_device->model));
1894         existing_device->sas_address = new_device->sas_address;
1895         existing_device->raid_level = new_device->raid_level;
1896         existing_device->queue_depth = new_device->queue_depth;
1897         existing_device->aio_handle = new_device->aio_handle;
1898         existing_device->volume_status = new_device->volume_status;
1899         existing_device->active_path_index = new_device->active_path_index;
1900         existing_device->phy_id = new_device->phy_id;
1901         existing_device->path_map = new_device->path_map;
1902         existing_device->bay = new_device->bay;
1903         existing_device->box_index = new_device->box_index;
1904         existing_device->phys_box_on_bus = new_device->phys_box_on_bus;
1905         existing_device->phy_connected_dev_type = new_device->phy_connected_dev_type;
1906         memcpy(existing_device->box, new_device->box,
1907                 sizeof(existing_device->box));
1908         memcpy(existing_device->phys_connector, new_device->phys_connector,
1909                 sizeof(existing_device->phys_connector));
1910         existing_device->next_bypass_group = 0;
1911         kfree(existing_device->raid_map);
1912         existing_device->raid_map = new_device->raid_map;
1913         existing_device->raid_bypass_configured =
1914                 new_device->raid_bypass_configured;
1915         existing_device->raid_bypass_enabled =
1916                 new_device->raid_bypass_enabled;
1917         existing_device->device_offline = false;
1918
1919         /* To prevent this from being freed later. */
1920         new_device->raid_map = NULL;
1921 }
1922
1923 static inline void pqi_free_device(struct pqi_scsi_dev *device)
1924 {
1925         if (device) {
1926                 kfree(device->raid_map);
1927                 kfree(device);
1928         }
1929 }
1930
1931 /*
1932  * Called when exposing a new device to the OS fails in order to re-adjust
1933  * our internal SCSI device list to match the SCSI ML's view.
1934  */
1935
1936 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1937         struct pqi_scsi_dev *device)
1938 {
1939         unsigned long flags;
1940
1941         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1942         list_del(&device->scsi_device_list_entry);
1943         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1944
1945         /* Allow the device structure to be freed later. */
1946         device->keep_device = false;
1947 }
1948
1949 static inline bool pqi_is_device_added(struct pqi_scsi_dev *device)
1950 {
1951         if (device->is_expander_smp_device)
1952                 return device->sas_port != NULL;
1953
1954         return device->sdev != NULL;
1955 }
1956
1957 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1958         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1959 {
1960         int rc;
1961         unsigned int i;
1962         unsigned long flags;
1963         enum pqi_find_result find_result;
1964         struct pqi_scsi_dev *device;
1965         struct pqi_scsi_dev *next;
1966         struct pqi_scsi_dev *matching_device;
1967         LIST_HEAD(add_list);
1968         LIST_HEAD(delete_list);
1969
1970         /*
1971          * The idea here is to do as little work as possible while holding the
1972          * spinlock.  That's why we go to great pains to defer anything other
1973          * than updating the internal device list until after we release the
1974          * spinlock.
1975          */
1976
1977         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1978
1979         /* Assume that all devices in the existing list have gone away. */
1980         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
1981                 device->device_gone = true;
1982
1983         for (i = 0; i < num_new_devices; i++) {
1984                 device = new_device_list[i];
1985
1986                 find_result = pqi_scsi_find_entry(ctrl_info, device,
1987                         &matching_device);
1988
1989                 switch (find_result) {
1990                 case DEVICE_SAME:
1991                         /*
1992                          * The newly found device is already in the existing
1993                          * device list.
1994                          */
1995                         device->new_device = false;
1996                         matching_device->device_gone = false;
1997                         pqi_scsi_update_device(matching_device, device);
1998                         break;
1999                 case DEVICE_NOT_FOUND:
2000                         /*
2001                          * The newly found device is NOT in the existing device
2002                          * list.
2003                          */
2004                         device->new_device = true;
2005                         break;
2006                 case DEVICE_CHANGED:
2007                         /*
2008                          * The original device has gone away and we need to add
2009                          * the new device.
2010                          */
2011                         device->new_device = true;
2012                         break;
2013                 }
2014         }
2015
2016         /* Process all devices that have gone away. */
2017         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
2018                 scsi_device_list_entry) {
2019                 if (device->device_gone) {
2020                         list_del_init(&device->scsi_device_list_entry);
2021                         list_add_tail(&device->delete_list_entry, &delete_list);
2022                 }
2023         }
2024
2025         /* Process all new devices. */
2026         for (i = 0; i < num_new_devices; i++) {
2027                 device = new_device_list[i];
2028                 if (!device->new_device)
2029                         continue;
2030                 if (device->volume_offline)
2031                         continue;
2032                 list_add_tail(&device->scsi_device_list_entry,
2033                         &ctrl_info->scsi_device_list);
2034                 list_add_tail(&device->add_list_entry, &add_list);
2035                 /* To prevent this device structure from being freed later. */
2036                 device->keep_device = true;
2037         }
2038
2039         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2040
2041         /*
2042          * If OFA is in progress and there are devices that need to be deleted,
2043          * allow any pending reset operations to continue and unblock any SCSI
2044          * requests before removal.
2045          */
2046         if (pqi_ofa_in_progress(ctrl_info)) {
2047                 list_for_each_entry_safe(device, next, &delete_list, delete_list_entry)
2048                         if (pqi_is_device_added(device))
2049                                 pqi_device_remove_start(device);
2050                 pqi_ctrl_unblock_device_reset(ctrl_info);
2051                 pqi_scsi_unblock_requests(ctrl_info);
2052         }
2053
2054         /* Remove all devices that have gone away. */
2055         list_for_each_entry_safe(device, next, &delete_list, delete_list_entry) {
2056                 if (device->volume_offline) {
2057                         pqi_dev_info(ctrl_info, "offline", device);
2058                         pqi_show_volume_status(ctrl_info, device);
2059                 }
2060                 list_del(&device->delete_list_entry);
2061                 if (pqi_is_device_added(device)) {
2062                         pqi_remove_device(ctrl_info, device);
2063                 } else {
2064                         if (!device->volume_offline)
2065                                 pqi_dev_info(ctrl_info, "removed", device);
2066                         pqi_free_device(device);
2067                 }
2068         }
2069
2070         /*
2071          * Notify the SCSI ML if the queue depth of any existing device has
2072          * changed.
2073          */
2074         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
2075                 if (device->sdev && device->queue_depth != device->advertised_queue_depth) {
2076                         device->advertised_queue_depth = device->queue_depth;
2077                         scsi_change_queue_depth(device->sdev, device->advertised_queue_depth);
2078                         if (device->rescan) {
2079                                 scsi_rescan_device(&device->sdev->sdev_gendev);
2080                                 device->rescan = false;
2081                         }
2082                 }
2083         }
2084
2085         /* Expose any new devices. */
2086         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
2087                 if (!pqi_is_device_added(device)) {
2088                         rc = pqi_add_device(ctrl_info, device);
2089                         if (rc == 0) {
2090                                 pqi_dev_info(ctrl_info, "added", device);
2091                         } else {
2092                                 dev_warn(&ctrl_info->pci_dev->dev,
2093                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
2094                                         ctrl_info->scsi_host->host_no,
2095                                         device->bus, device->target,
2096                                         device->lun);
2097                                 pqi_fixup_botched_add(ctrl_info, device);
2098                         }
2099                 }
2100         }
2101 }
2102
2103 static inline bool pqi_is_supported_device(struct pqi_scsi_dev *device)
2104 {
2105         /*
2106          * Only support the HBA controller itself as a RAID
2107          * controller.  If it's a RAID controller other than
2108          * the HBA itself (an external RAID controller, for
2109          * example), we don't support it.
2110          */
2111         if (device->device_type == SA_DEVICE_TYPE_CONTROLLER &&
2112                 !pqi_is_hba_lunid(device->scsi3addr))
2113                         return false;
2114
2115         return true;
2116 }
2117
2118 static inline bool pqi_skip_device(u8 *scsi3addr)
2119 {
2120         /* Ignore all masked devices. */
2121         if (MASKED_DEVICE(scsi3addr))
2122                 return true;
2123
2124         return false;
2125 }
2126
2127 static inline void pqi_mask_device(u8 *scsi3addr)
2128 {
2129         scsi3addr[3] |= 0xc0;
2130 }
2131
2132 static inline bool pqi_is_device_with_sas_address(struct pqi_scsi_dev *device)
2133 {
2134         switch (device->device_type) {
2135         case SA_DEVICE_TYPE_SAS:
2136         case SA_DEVICE_TYPE_EXPANDER_SMP:
2137         case SA_DEVICE_TYPE_SES:
2138                 return true;
2139         }
2140
2141         return false;
2142 }
2143
2144 static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
2145 {
2146         return !device->is_physical_device || !pqi_skip_device(device->scsi3addr);
2147 }
2148
2149 static inline void pqi_set_physical_device_wwid(struct pqi_ctrl_info *ctrl_info,
2150         struct pqi_scsi_dev *device, struct report_phys_lun_extended_entry *phys_lun_ext_entry)
2151 {
2152         if (ctrl_info->unique_wwid_in_report_phys_lun_supported ||
2153                 pqi_is_device_with_sas_address(device))
2154                 device->wwid = phys_lun_ext_entry->wwid;
2155         else
2156                 device->wwid = cpu_to_be64(get_unaligned_be64(&device->page_83_identifier));
2157 }
2158
2159 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2160 {
2161         int i;
2162         int rc;
2163         LIST_HEAD(new_device_list_head);
2164         struct report_phys_lun_extended *physdev_list = NULL;
2165         struct report_log_lun_extended *logdev_list = NULL;
2166         struct report_phys_lun_extended_entry *phys_lun_ext_entry;
2167         struct report_log_lun_extended_entry *log_lun_ext_entry;
2168         struct bmic_identify_physical_device *id_phys = NULL;
2169         u32 num_physicals;
2170         u32 num_logicals;
2171         struct pqi_scsi_dev **new_device_list = NULL;
2172         struct pqi_scsi_dev *device;
2173         struct pqi_scsi_dev *next;
2174         unsigned int num_new_devices;
2175         unsigned int num_valid_devices;
2176         bool is_physical_device;
2177         u8 *scsi3addr;
2178         unsigned int physical_index;
2179         unsigned int logical_index;
2180         static char *out_of_memory_msg =
2181                 "failed to allocate memory, device discovery stopped";
2182
2183         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
2184         if (rc)
2185                 goto out;
2186
2187         if (physdev_list)
2188                 num_physicals =
2189                         get_unaligned_be32(&physdev_list->header.list_length)
2190                                 / sizeof(physdev_list->lun_entries[0]);
2191         else
2192                 num_physicals = 0;
2193
2194         if (logdev_list)
2195                 num_logicals =
2196                         get_unaligned_be32(&logdev_list->header.list_length)
2197                                 / sizeof(logdev_list->lun_entries[0]);
2198         else
2199                 num_logicals = 0;
2200
2201         if (num_physicals) {
2202                 /*
2203                  * We need this buffer for calls to pqi_get_physical_disk_info()
2204                  * below.  We allocate it here instead of inside
2205                  * pqi_get_physical_disk_info() because it's a fairly large
2206                  * buffer.
2207                  */
2208                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
2209                 if (!id_phys) {
2210                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2211                                 out_of_memory_msg);
2212                         rc = -ENOMEM;
2213                         goto out;
2214                 }
2215
2216                 if (pqi_hide_vsep) {
2217                         for (i = num_physicals - 1; i >= 0; i--) {
2218                                 phys_lun_ext_entry =
2219                                                 &physdev_list->lun_entries[i];
2220                                 if (CISS_GET_DRIVE_NUMBER(phys_lun_ext_entry->lunid) == PQI_VSEP_CISS_BTL) {
2221                                         pqi_mask_device(phys_lun_ext_entry->lunid);
2222                                         break;
2223                                 }
2224                         }
2225                 }
2226         }
2227
2228         if (num_logicals &&
2229                 (logdev_list->header.flags & CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX))
2230                 ctrl_info->lv_drive_type_mix_valid = true;
2231
2232         num_new_devices = num_physicals + num_logicals;
2233
2234         new_device_list = kmalloc_array(num_new_devices,
2235                                         sizeof(*new_device_list),
2236                                         GFP_KERNEL);
2237         if (!new_device_list) {
2238                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
2239                 rc = -ENOMEM;
2240                 goto out;
2241         }
2242
2243         for (i = 0; i < num_new_devices; i++) {
2244                 device = kzalloc(sizeof(*device), GFP_KERNEL);
2245                 if (!device) {
2246                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2247                                 out_of_memory_msg);
2248                         rc = -ENOMEM;
2249                         goto out;
2250                 }
2251                 list_add_tail(&device->new_device_list_entry,
2252                         &new_device_list_head);
2253         }
2254
2255         device = NULL;
2256         num_valid_devices = 0;
2257         physical_index = 0;
2258         logical_index = 0;
2259
2260         for (i = 0; i < num_new_devices; i++) {
2261
2262                 if ((!pqi_expose_ld_first && i < num_physicals) ||
2263                         (pqi_expose_ld_first && i >= num_logicals)) {
2264                         is_physical_device = true;
2265                         phys_lun_ext_entry =
2266                                 &physdev_list->lun_entries[physical_index++];
2267                         log_lun_ext_entry = NULL;
2268                         scsi3addr = phys_lun_ext_entry->lunid;
2269                 } else {
2270                         is_physical_device = false;
2271                         phys_lun_ext_entry = NULL;
2272                         log_lun_ext_entry =
2273                                 &logdev_list->lun_entries[logical_index++];
2274                         scsi3addr = log_lun_ext_entry->lunid;
2275                 }
2276
2277                 if (is_physical_device && pqi_skip_device(scsi3addr))
2278                         continue;
2279
2280                 if (device)
2281                         device = list_next_entry(device, new_device_list_entry);
2282                 else
2283                         device = list_first_entry(&new_device_list_head,
2284                                 struct pqi_scsi_dev, new_device_list_entry);
2285
2286                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
2287                 device->is_physical_device = is_physical_device;
2288                 if (is_physical_device) {
2289                         device->device_type = phys_lun_ext_entry->device_type;
2290                         if (device->device_type == SA_DEVICE_TYPE_EXPANDER_SMP)
2291                                 device->is_expander_smp_device = true;
2292                 } else {
2293                         device->is_external_raid_device =
2294                                 pqi_is_external_raid_addr(scsi3addr);
2295                 }
2296
2297                 if (!pqi_is_supported_device(device))
2298                         continue;
2299
2300                 /* Gather information about the device. */
2301                 rc = pqi_get_device_info(ctrl_info, device, id_phys);
2302                 if (rc == -ENOMEM) {
2303                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2304                                 out_of_memory_msg);
2305                         goto out;
2306                 }
2307                 if (rc) {
2308                         if (device->is_physical_device)
2309                                 dev_warn(&ctrl_info->pci_dev->dev,
2310                                         "obtaining device info failed, skipping physical device %016llx\n",
2311                                         get_unaligned_be64(&phys_lun_ext_entry->wwid));
2312                         else
2313                                 dev_warn(&ctrl_info->pci_dev->dev,
2314                                         "obtaining device info failed, skipping logical device %08x%08x\n",
2315                                         *((u32 *)&device->scsi3addr),
2316                                         *((u32 *)&device->scsi3addr[4]));
2317                         rc = 0;
2318                         continue;
2319                 }
2320
2321                 pqi_assign_bus_target_lun(device);
2322
2323                 if (device->is_physical_device) {
2324                         pqi_set_physical_device_wwid(ctrl_info, device, phys_lun_ext_entry);
2325                         if ((phys_lun_ext_entry->device_flags &
2326                                 CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED) &&
2327                                 phys_lun_ext_entry->aio_handle) {
2328                                         device->aio_enabled = true;
2329                                         device->aio_handle =
2330                                                 phys_lun_ext_entry->aio_handle;
2331                         }
2332                 } else {
2333                         memcpy(device->volume_id, log_lun_ext_entry->volume_id,
2334                                 sizeof(device->volume_id));
2335                 }
2336
2337                 if (pqi_is_device_with_sas_address(device))
2338                         device->sas_address = get_unaligned_be64(&device->wwid);
2339
2340                 new_device_list[num_valid_devices++] = device;
2341         }
2342
2343         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
2344
2345 out:
2346         list_for_each_entry_safe(device, next, &new_device_list_head,
2347                 new_device_list_entry) {
2348                 if (device->keep_device)
2349                         continue;
2350                 list_del(&device->new_device_list_entry);
2351                 pqi_free_device(device);
2352         }
2353
2354         kfree(new_device_list);
2355         kfree(physdev_list);
2356         kfree(logdev_list);
2357         kfree(id_phys);
2358
2359         return rc;
2360 }
2361
2362 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2363 {
2364         int rc;
2365         int mutex_acquired;
2366
2367         if (pqi_ctrl_offline(ctrl_info))
2368                 return -ENXIO;
2369
2370         mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
2371
2372         if (!mutex_acquired) {
2373                 if (pqi_ctrl_scan_blocked(ctrl_info))
2374                         return -EBUSY;
2375                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2376                 return -EINPROGRESS;
2377         }
2378
2379         rc = pqi_update_scsi_devices(ctrl_info);
2380         if (rc && !pqi_ctrl_scan_blocked(ctrl_info))
2381                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2382
2383         mutex_unlock(&ctrl_info->scan_mutex);
2384
2385         return rc;
2386 }
2387
2388 static void pqi_scan_start(struct Scsi_Host *shost)
2389 {
2390         struct pqi_ctrl_info *ctrl_info;
2391
2392         ctrl_info = shost_to_hba(shost);
2393
2394         pqi_scan_scsi_devices(ctrl_info);
2395 }
2396
2397 /* Returns TRUE if scan is finished. */
2398
2399 static int pqi_scan_finished(struct Scsi_Host *shost,
2400         unsigned long elapsed_time)
2401 {
2402         struct pqi_ctrl_info *ctrl_info;
2403
2404         ctrl_info = shost_priv(shost);
2405
2406         return !mutex_is_locked(&ctrl_info->scan_mutex);
2407 }
2408
2409 static inline void pqi_set_encryption_info(struct pqi_encryption_info *encryption_info,
2410         struct raid_map *raid_map, u64 first_block)
2411 {
2412         u32 volume_blk_size;
2413
2414         /*
2415          * Set the encryption tweak values based on logical block address.
2416          * If the block size is 512, the tweak value is equal to the LBA.
2417          * For other block sizes, tweak value is (LBA * block size) / 512.
2418          */
2419         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2420         if (volume_blk_size != 512)
2421                 first_block = (first_block * volume_blk_size) / 512;
2422
2423         encryption_info->data_encryption_key_index =
2424                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2425         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2426         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2427 }
2428
2429 /*
2430  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2431  */
2432
2433 static bool pqi_aio_raid_level_supported(struct pqi_ctrl_info *ctrl_info,
2434         struct pqi_scsi_dev_raid_map_data *rmd)
2435 {
2436         bool is_supported = true;
2437
2438         switch (rmd->raid_level) {
2439         case SA_RAID_0:
2440                 break;
2441         case SA_RAID_1:
2442                 if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2443                         rmd->data_length > ctrl_info->max_write_raid_1_10_2drive))
2444                         is_supported = false;
2445                 break;
2446         case SA_RAID_TRIPLE:
2447                 if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2448                         rmd->data_length > ctrl_info->max_write_raid_1_10_3drive))
2449                         is_supported = false;
2450                 break;
2451         case SA_RAID_5:
2452                 if (rmd->is_write && (!ctrl_info->enable_r5_writes ||
2453                         rmd->data_length > ctrl_info->max_write_raid_5_6))
2454                         is_supported = false;
2455                 break;
2456         case SA_RAID_6:
2457                 if (rmd->is_write && (!ctrl_info->enable_r6_writes ||
2458                         rmd->data_length > ctrl_info->max_write_raid_5_6))
2459                         is_supported = false;
2460                 break;
2461         default:
2462                 is_supported = false;
2463                 break;
2464         }
2465
2466         return is_supported;
2467 }
2468
2469 #define PQI_RAID_BYPASS_INELIGIBLE      1
2470
2471 static int pqi_get_aio_lba_and_block_count(struct scsi_cmnd *scmd,
2472         struct pqi_scsi_dev_raid_map_data *rmd)
2473 {
2474         /* Check for valid opcode, get LBA and block count. */
2475         switch (scmd->cmnd[0]) {
2476         case WRITE_6:
2477                 rmd->is_write = true;
2478                 fallthrough;
2479         case READ_6:
2480                 rmd->first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2481                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2482                 rmd->block_cnt = (u32)scmd->cmnd[4];
2483                 if (rmd->block_cnt == 0)
2484                         rmd->block_cnt = 256;
2485                 break;
2486         case WRITE_10:
2487                 rmd->is_write = true;
2488                 fallthrough;
2489         case READ_10:
2490                 rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2491                 rmd->block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2492                 break;
2493         case WRITE_12:
2494                 rmd->is_write = true;
2495                 fallthrough;
2496         case READ_12:
2497                 rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2498                 rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2499                 break;
2500         case WRITE_16:
2501                 rmd->is_write = true;
2502                 fallthrough;
2503         case READ_16:
2504                 rmd->first_block = get_unaligned_be64(&scmd->cmnd[2]);
2505                 rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2506                 break;
2507         default:
2508                 /* Process via normal I/O path. */
2509                 return PQI_RAID_BYPASS_INELIGIBLE;
2510         }
2511
2512         put_unaligned_le32(scsi_bufflen(scmd), &rmd->data_length);
2513
2514         return 0;
2515 }
2516
2517 static int pci_get_aio_common_raid_map_values(struct pqi_ctrl_info *ctrl_info,
2518         struct pqi_scsi_dev_raid_map_data *rmd, struct raid_map *raid_map)
2519 {
2520 #if BITS_PER_LONG == 32
2521         u64 tmpdiv;
2522 #endif
2523
2524         rmd->last_block = rmd->first_block + rmd->block_cnt - 1;
2525
2526         /* Check for invalid block or wraparound. */
2527         if (rmd->last_block >=
2528                 get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2529                 rmd->last_block < rmd->first_block)
2530                 return PQI_RAID_BYPASS_INELIGIBLE;
2531
2532         rmd->data_disks_per_row =
2533                 get_unaligned_le16(&raid_map->data_disks_per_row);
2534         rmd->strip_size = get_unaligned_le16(&raid_map->strip_size);
2535         rmd->layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2536
2537         /* Calculate stripe information for the request. */
2538         rmd->blocks_per_row = rmd->data_disks_per_row * rmd->strip_size;
2539         if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2540                 return PQI_RAID_BYPASS_INELIGIBLE;
2541 #if BITS_PER_LONG == 32
2542         tmpdiv = rmd->first_block;
2543         do_div(tmpdiv, rmd->blocks_per_row);
2544         rmd->first_row = tmpdiv;
2545         tmpdiv = rmd->last_block;
2546         do_div(tmpdiv, rmd->blocks_per_row);
2547         rmd->last_row = tmpdiv;
2548         rmd->first_row_offset = (u32)(rmd->first_block - (rmd->first_row * rmd->blocks_per_row));
2549         rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row * rmd->blocks_per_row));
2550         tmpdiv = rmd->first_row_offset;
2551         do_div(tmpdiv, rmd->strip_size);
2552         rmd->first_column = tmpdiv;
2553         tmpdiv = rmd->last_row_offset;
2554         do_div(tmpdiv, rmd->strip_size);
2555         rmd->last_column = tmpdiv;
2556 #else
2557         rmd->first_row = rmd->first_block / rmd->blocks_per_row;
2558         rmd->last_row = rmd->last_block / rmd->blocks_per_row;
2559         rmd->first_row_offset = (u32)(rmd->first_block -
2560                 (rmd->first_row * rmd->blocks_per_row));
2561         rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row *
2562                 rmd->blocks_per_row));
2563         rmd->first_column = rmd->first_row_offset / rmd->strip_size;
2564         rmd->last_column = rmd->last_row_offset / rmd->strip_size;
2565 #endif
2566
2567         /* If this isn't a single row/column then give to the controller. */
2568         if (rmd->first_row != rmd->last_row ||
2569                 rmd->first_column != rmd->last_column)
2570                 return PQI_RAID_BYPASS_INELIGIBLE;
2571
2572         /* Proceeding with driver mapping. */
2573         rmd->total_disks_per_row = rmd->data_disks_per_row +
2574                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2575         rmd->map_row = ((u32)(rmd->first_row >>
2576                 raid_map->parity_rotation_shift)) %
2577                 get_unaligned_le16(&raid_map->row_cnt);
2578         rmd->map_index = (rmd->map_row * rmd->total_disks_per_row) +
2579                 rmd->first_column;
2580
2581         return 0;
2582 }
2583
2584 static int pqi_calc_aio_r5_or_r6(struct pqi_scsi_dev_raid_map_data *rmd,
2585         struct raid_map *raid_map)
2586 {
2587 #if BITS_PER_LONG == 32
2588         u64 tmpdiv;
2589 #endif
2590
2591         if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2592                 return PQI_RAID_BYPASS_INELIGIBLE;
2593
2594         /* RAID 50/60 */
2595         /* Verify first and last block are in same RAID group. */
2596         rmd->stripesize = rmd->blocks_per_row * rmd->layout_map_count;
2597 #if BITS_PER_LONG == 32
2598         tmpdiv = rmd->first_block;
2599         rmd->first_group = do_div(tmpdiv, rmd->stripesize);
2600         tmpdiv = rmd->first_group;
2601         do_div(tmpdiv, rmd->blocks_per_row);
2602         rmd->first_group = tmpdiv;
2603         tmpdiv = rmd->last_block;
2604         rmd->last_group = do_div(tmpdiv, rmd->stripesize);
2605         tmpdiv = rmd->last_group;
2606         do_div(tmpdiv, rmd->blocks_per_row);
2607         rmd->last_group = tmpdiv;
2608 #else
2609         rmd->first_group = (rmd->first_block % rmd->stripesize) / rmd->blocks_per_row;
2610         rmd->last_group = (rmd->last_block % rmd->stripesize) / rmd->blocks_per_row;
2611 #endif
2612         if (rmd->first_group != rmd->last_group)
2613                 return PQI_RAID_BYPASS_INELIGIBLE;
2614
2615         /* Verify request is in a single row of RAID 5/6. */
2616 #if BITS_PER_LONG == 32
2617         tmpdiv = rmd->first_block;
2618         do_div(tmpdiv, rmd->stripesize);
2619         rmd->first_row = tmpdiv;
2620         rmd->r5or6_first_row = tmpdiv;
2621         tmpdiv = rmd->last_block;
2622         do_div(tmpdiv, rmd->stripesize);
2623         rmd->r5or6_last_row = tmpdiv;
2624 #else
2625         rmd->first_row = rmd->r5or6_first_row =
2626                 rmd->first_block / rmd->stripesize;
2627         rmd->r5or6_last_row = rmd->last_block / rmd->stripesize;
2628 #endif
2629         if (rmd->r5or6_first_row != rmd->r5or6_last_row)
2630                 return PQI_RAID_BYPASS_INELIGIBLE;
2631
2632         /* Verify request is in a single column. */
2633 #if BITS_PER_LONG == 32
2634         tmpdiv = rmd->first_block;
2635         rmd->first_row_offset = do_div(tmpdiv, rmd->stripesize);
2636         tmpdiv = rmd->first_row_offset;
2637         rmd->first_row_offset = (u32)do_div(tmpdiv, rmd->blocks_per_row);
2638         rmd->r5or6_first_row_offset = rmd->first_row_offset;
2639         tmpdiv = rmd->last_block;
2640         rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->stripesize);
2641         tmpdiv = rmd->r5or6_last_row_offset;
2642         rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->blocks_per_row);
2643         tmpdiv = rmd->r5or6_first_row_offset;
2644         do_div(tmpdiv, rmd->strip_size);
2645         rmd->first_column = rmd->r5or6_first_column = tmpdiv;
2646         tmpdiv = rmd->r5or6_last_row_offset;
2647         do_div(tmpdiv, rmd->strip_size);
2648         rmd->r5or6_last_column = tmpdiv;
2649 #else
2650         rmd->first_row_offset = rmd->r5or6_first_row_offset =
2651                 (u32)((rmd->first_block % rmd->stripesize) %
2652                 rmd->blocks_per_row);
2653
2654         rmd->r5or6_last_row_offset =
2655                 (u32)((rmd->last_block % rmd->stripesize) %
2656                 rmd->blocks_per_row);
2657
2658         rmd->first_column =
2659                 rmd->r5or6_first_row_offset / rmd->strip_size;
2660         rmd->r5or6_first_column = rmd->first_column;
2661         rmd->r5or6_last_column = rmd->r5or6_last_row_offset / rmd->strip_size;
2662 #endif
2663         if (rmd->r5or6_first_column != rmd->r5or6_last_column)
2664                 return PQI_RAID_BYPASS_INELIGIBLE;
2665
2666         /* Request is eligible. */
2667         rmd->map_row =
2668                 ((u32)(rmd->first_row >> raid_map->parity_rotation_shift)) %
2669                 get_unaligned_le16(&raid_map->row_cnt);
2670
2671         rmd->map_index = (rmd->first_group *
2672                 (get_unaligned_le16(&raid_map->row_cnt) *
2673                 rmd->total_disks_per_row)) +
2674                 (rmd->map_row * rmd->total_disks_per_row) + rmd->first_column;
2675
2676         if (rmd->is_write) {
2677                 u32 index;
2678
2679                 /*
2680                  * p_parity_it_nexus and q_parity_it_nexus are pointers to the
2681                  * parity entries inside the device's raid_map.
2682                  *
2683                  * A device's RAID map is bounded by: number of RAID disks squared.
2684                  *
2685                  * The devices RAID map size is checked during device
2686                  * initialization.
2687                  */
2688                 index = DIV_ROUND_UP(rmd->map_index + 1, rmd->total_disks_per_row);
2689                 index *= rmd->total_disks_per_row;
2690                 index -= get_unaligned_le16(&raid_map->metadata_disks_per_row);
2691
2692                 rmd->p_parity_it_nexus = raid_map->disk_data[index].aio_handle;
2693                 if (rmd->raid_level == SA_RAID_6) {
2694                         rmd->q_parity_it_nexus = raid_map->disk_data[index + 1].aio_handle;
2695                         rmd->xor_mult = raid_map->disk_data[rmd->map_index].xor_mult[1];
2696                 }
2697 #if BITS_PER_LONG == 32
2698                 tmpdiv = rmd->first_block;
2699                 do_div(tmpdiv, rmd->blocks_per_row);
2700                 rmd->row = tmpdiv;
2701 #else
2702                 rmd->row = rmd->first_block / rmd->blocks_per_row;
2703 #endif
2704         }
2705
2706         return 0;
2707 }
2708
2709 static void pqi_set_aio_cdb(struct pqi_scsi_dev_raid_map_data *rmd)
2710 {
2711         /* Build the new CDB for the physical disk I/O. */
2712         if (rmd->disk_block > 0xffffffff) {
2713                 rmd->cdb[0] = rmd->is_write ? WRITE_16 : READ_16;
2714                 rmd->cdb[1] = 0;
2715                 put_unaligned_be64(rmd->disk_block, &rmd->cdb[2]);
2716                 put_unaligned_be32(rmd->disk_block_cnt, &rmd->cdb[10]);
2717                 rmd->cdb[14] = 0;
2718                 rmd->cdb[15] = 0;
2719                 rmd->cdb_length = 16;
2720         } else {
2721                 rmd->cdb[0] = rmd->is_write ? WRITE_10 : READ_10;
2722                 rmd->cdb[1] = 0;
2723                 put_unaligned_be32((u32)rmd->disk_block, &rmd->cdb[2]);
2724                 rmd->cdb[6] = 0;
2725                 put_unaligned_be16((u16)rmd->disk_block_cnt, &rmd->cdb[7]);
2726                 rmd->cdb[9] = 0;
2727                 rmd->cdb_length = 10;
2728         }
2729 }
2730
2731 static void pqi_calc_aio_r1_nexus(struct raid_map *raid_map,
2732         struct pqi_scsi_dev_raid_map_data *rmd)
2733 {
2734         u32 index;
2735         u32 group;
2736
2737         group = rmd->map_index / rmd->data_disks_per_row;
2738
2739         index = rmd->map_index - (group * rmd->data_disks_per_row);
2740         rmd->it_nexus[0] = raid_map->disk_data[index].aio_handle;
2741         index += rmd->data_disks_per_row;
2742         rmd->it_nexus[1] = raid_map->disk_data[index].aio_handle;
2743         if (rmd->layout_map_count > 2) {
2744                 index += rmd->data_disks_per_row;
2745                 rmd->it_nexus[2] = raid_map->disk_data[index].aio_handle;
2746         }
2747
2748         rmd->num_it_nexus_entries = rmd->layout_map_count;
2749 }
2750
2751 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2752         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2753         struct pqi_queue_group *queue_group)
2754 {
2755         int rc;
2756         struct raid_map *raid_map;
2757         u32 group;
2758         u32 next_bypass_group;
2759         struct pqi_encryption_info *encryption_info_ptr;
2760         struct pqi_encryption_info encryption_info;
2761         struct pqi_scsi_dev_raid_map_data rmd = { 0 };
2762
2763         rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
2764         if (rc)
2765                 return PQI_RAID_BYPASS_INELIGIBLE;
2766
2767         rmd.raid_level = device->raid_level;
2768
2769         if (!pqi_aio_raid_level_supported(ctrl_info, &rmd))
2770                 return PQI_RAID_BYPASS_INELIGIBLE;
2771
2772         if (unlikely(rmd.block_cnt == 0))
2773                 return PQI_RAID_BYPASS_INELIGIBLE;
2774
2775         raid_map = device->raid_map;
2776
2777         rc = pci_get_aio_common_raid_map_values(ctrl_info, &rmd, raid_map);
2778         if (rc)
2779                 return PQI_RAID_BYPASS_INELIGIBLE;
2780
2781         if (device->raid_level == SA_RAID_1 ||
2782                 device->raid_level == SA_RAID_TRIPLE) {
2783                 if (rmd.is_write) {
2784                         pqi_calc_aio_r1_nexus(raid_map, &rmd);
2785                 } else {
2786                         group = device->next_bypass_group;
2787                         next_bypass_group = group + 1;
2788                         if (next_bypass_group >= rmd.layout_map_count)
2789                                 next_bypass_group = 0;
2790                         device->next_bypass_group = next_bypass_group;
2791                         rmd.map_index += group * rmd.data_disks_per_row;
2792                 }
2793         } else if ((device->raid_level == SA_RAID_5 ||
2794                 device->raid_level == SA_RAID_6) &&
2795                 (rmd.layout_map_count > 1 || rmd.is_write)) {
2796                 rc = pqi_calc_aio_r5_or_r6(&rmd, raid_map);
2797                 if (rc)
2798                         return PQI_RAID_BYPASS_INELIGIBLE;
2799         }
2800
2801         if (unlikely(rmd.map_index >= RAID_MAP_MAX_ENTRIES))
2802                 return PQI_RAID_BYPASS_INELIGIBLE;
2803
2804         rmd.aio_handle = raid_map->disk_data[rmd.map_index].aio_handle;
2805         rmd.disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2806                 rmd.first_row * rmd.strip_size +
2807                 (rmd.first_row_offset - rmd.first_column * rmd.strip_size);
2808         rmd.disk_block_cnt = rmd.block_cnt;
2809
2810         /* Handle differing logical/physical block sizes. */
2811         if (raid_map->phys_blk_shift) {
2812                 rmd.disk_block <<= raid_map->phys_blk_shift;
2813                 rmd.disk_block_cnt <<= raid_map->phys_blk_shift;
2814         }
2815
2816         if (unlikely(rmd.disk_block_cnt > 0xffff))
2817                 return PQI_RAID_BYPASS_INELIGIBLE;
2818
2819         pqi_set_aio_cdb(&rmd);
2820
2821         if (get_unaligned_le16(&raid_map->flags) & RAID_MAP_ENCRYPTION_ENABLED) {
2822                 if (rmd.data_length > device->max_transfer_encrypted)
2823                         return PQI_RAID_BYPASS_INELIGIBLE;
2824                 pqi_set_encryption_info(&encryption_info, raid_map, rmd.first_block);
2825                 encryption_info_ptr = &encryption_info;
2826         } else {
2827                 encryption_info_ptr = NULL;
2828         }
2829
2830         if (rmd.is_write) {
2831                 switch (device->raid_level) {
2832                 case SA_RAID_1:
2833                 case SA_RAID_TRIPLE:
2834                         return pqi_aio_submit_r1_write_io(ctrl_info, scmd, queue_group,
2835                                 encryption_info_ptr, device, &rmd);
2836                 case SA_RAID_5:
2837                 case SA_RAID_6:
2838                         return pqi_aio_submit_r56_write_io(ctrl_info, scmd, queue_group,
2839                                 encryption_info_ptr, device, &rmd);
2840                 }
2841         }
2842
2843         return pqi_aio_submit_io(ctrl_info, scmd, rmd.aio_handle,
2844                 rmd.cdb, rmd.cdb_length, queue_group,
2845                 encryption_info_ptr, true);
2846 }
2847
2848 #define PQI_STATUS_IDLE         0x0
2849
2850 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
2851 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
2852
2853 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
2854 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
2855 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
2856 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
2857 #define PQI_DEVICE_STATE_ERROR                          0x4
2858
2859 #define PQI_MODE_READY_TIMEOUT_SECS             30
2860 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
2861
2862 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2863 {
2864         struct pqi_device_registers __iomem *pqi_registers;
2865         unsigned long timeout;
2866         u64 signature;
2867         u8 status;
2868
2869         pqi_registers = ctrl_info->pqi_registers;
2870         timeout = (PQI_MODE_READY_TIMEOUT_SECS * PQI_HZ) + jiffies;
2871
2872         while (1) {
2873                 signature = readq(&pqi_registers->signature);
2874                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2875                         sizeof(signature)) == 0)
2876                         break;
2877                 if (time_after(jiffies, timeout)) {
2878                         dev_err(&ctrl_info->pci_dev->dev,
2879                                 "timed out waiting for PQI signature\n");
2880                         return -ETIMEDOUT;
2881                 }
2882                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2883         }
2884
2885         while (1) {
2886                 status = readb(&pqi_registers->function_and_status_code);
2887                 if (status == PQI_STATUS_IDLE)
2888                         break;
2889                 if (time_after(jiffies, timeout)) {
2890                         dev_err(&ctrl_info->pci_dev->dev,
2891                                 "timed out waiting for PQI IDLE\n");
2892                         return -ETIMEDOUT;
2893                 }
2894                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2895         }
2896
2897         while (1) {
2898                 if (readl(&pqi_registers->device_status) ==
2899                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2900                         break;
2901                 if (time_after(jiffies, timeout)) {
2902                         dev_err(&ctrl_info->pci_dev->dev,
2903                                 "timed out waiting for PQI all registers ready\n");
2904                         return -ETIMEDOUT;
2905                 }
2906                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2907         }
2908
2909         return 0;
2910 }
2911
2912 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2913 {
2914         struct pqi_scsi_dev *device;
2915
2916         device = io_request->scmd->device->hostdata;
2917         device->raid_bypass_enabled = false;
2918         device->aio_enabled = false;
2919 }
2920
2921 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
2922 {
2923         struct pqi_ctrl_info *ctrl_info;
2924         struct pqi_scsi_dev *device;
2925
2926         device = sdev->hostdata;
2927         if (device->device_offline)
2928                 return;
2929
2930         device->device_offline = true;
2931         ctrl_info = shost_to_hba(sdev->host);
2932         pqi_schedule_rescan_worker(ctrl_info);
2933         dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n",
2934                 path, ctrl_info->scsi_host->host_no, device->bus,
2935                 device->target, device->lun);
2936 }
2937
2938 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2939 {
2940         u8 scsi_status;
2941         u8 host_byte;
2942         struct scsi_cmnd *scmd;
2943         struct pqi_raid_error_info *error_info;
2944         size_t sense_data_length;
2945         int residual_count;
2946         int xfer_count;
2947         struct scsi_sense_hdr sshdr;
2948
2949         scmd = io_request->scmd;
2950         if (!scmd)
2951                 return;
2952
2953         error_info = io_request->error_info;
2954         scsi_status = error_info->status;
2955         host_byte = DID_OK;
2956
2957         switch (error_info->data_out_result) {
2958         case PQI_DATA_IN_OUT_GOOD:
2959                 break;
2960         case PQI_DATA_IN_OUT_UNDERFLOW:
2961                 xfer_count =
2962                         get_unaligned_le32(&error_info->data_out_transferred);
2963                 residual_count = scsi_bufflen(scmd) - xfer_count;
2964                 scsi_set_resid(scmd, residual_count);
2965                 if (xfer_count < scmd->underflow)
2966                         host_byte = DID_SOFT_ERROR;
2967                 break;
2968         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
2969         case PQI_DATA_IN_OUT_ABORTED:
2970                 host_byte = DID_ABORT;
2971                 break;
2972         case PQI_DATA_IN_OUT_TIMEOUT:
2973                 host_byte = DID_TIME_OUT;
2974                 break;
2975         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
2976         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
2977         case PQI_DATA_IN_OUT_BUFFER_ERROR:
2978         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
2979         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
2980         case PQI_DATA_IN_OUT_ERROR:
2981         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
2982         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
2983         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
2984         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
2985         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
2986         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
2987         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
2988         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
2989         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
2990         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
2991         default:
2992                 host_byte = DID_ERROR;
2993                 break;
2994         }
2995
2996         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2997         if (sense_data_length == 0)
2998                 sense_data_length =
2999                         get_unaligned_le16(&error_info->response_data_length);
3000         if (sense_data_length) {
3001                 if (sense_data_length > sizeof(error_info->data))
3002                         sense_data_length = sizeof(error_info->data);
3003
3004                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3005                         scsi_normalize_sense(error_info->data,
3006                                 sense_data_length, &sshdr) &&
3007                                 sshdr.sense_key == HARDWARE_ERROR &&
3008                                 sshdr.asc == 0x3e) {
3009                         struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host);
3010                         struct pqi_scsi_dev *device = scmd->device->hostdata;
3011
3012                         switch (sshdr.ascq) {
3013                         case 0x1: /* LOGICAL UNIT FAILURE */
3014                                 if (printk_ratelimit())
3015                                         scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
3016                                                 ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3017                                 pqi_take_device_offline(scmd->device, "RAID");
3018                                 host_byte = DID_NO_CONNECT;
3019                                 break;
3020
3021                         default: /* See http://www.t10.org/lists/asc-num.htm#ASC_3E */
3022                                 if (printk_ratelimit())
3023                                         scmd_printk(KERN_ERR, scmd, "received unhandled error %d from controller for scsi %d:%d:%d:%d\n",
3024                                                 sshdr.ascq, ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3025                                 break;
3026                         }
3027                 }
3028
3029                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3030                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
3031                 memcpy(scmd->sense_buffer, error_info->data,
3032                         sense_data_length);
3033         }
3034
3035         scmd->result = scsi_status;
3036         set_host_byte(scmd, host_byte);
3037 }
3038
3039 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
3040 {
3041         u8 scsi_status;
3042         u8 host_byte;
3043         struct scsi_cmnd *scmd;
3044         struct pqi_aio_error_info *error_info;
3045         size_t sense_data_length;
3046         int residual_count;
3047         int xfer_count;
3048         bool device_offline;
3049
3050         scmd = io_request->scmd;
3051         error_info = io_request->error_info;
3052         host_byte = DID_OK;
3053         sense_data_length = 0;
3054         device_offline = false;
3055
3056         switch (error_info->service_response) {
3057         case PQI_AIO_SERV_RESPONSE_COMPLETE:
3058                 scsi_status = error_info->status;
3059                 break;
3060         case PQI_AIO_SERV_RESPONSE_FAILURE:
3061                 switch (error_info->status) {
3062                 case PQI_AIO_STATUS_IO_ABORTED:
3063                         scsi_status = SAM_STAT_TASK_ABORTED;
3064                         break;
3065                 case PQI_AIO_STATUS_UNDERRUN:
3066                         scsi_status = SAM_STAT_GOOD;
3067                         residual_count = get_unaligned_le32(
3068                                                 &error_info->residual_count);
3069                         scsi_set_resid(scmd, residual_count);
3070                         xfer_count = scsi_bufflen(scmd) - residual_count;
3071                         if (xfer_count < scmd->underflow)
3072                                 host_byte = DID_SOFT_ERROR;
3073                         break;
3074                 case PQI_AIO_STATUS_OVERRUN:
3075                         scsi_status = SAM_STAT_GOOD;
3076                         break;
3077                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
3078                         pqi_aio_path_disabled(io_request);
3079                         scsi_status = SAM_STAT_GOOD;
3080                         io_request->status = -EAGAIN;
3081                         break;
3082                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
3083                 case PQI_AIO_STATUS_INVALID_DEVICE:
3084                         if (!io_request->raid_bypass) {
3085                                 device_offline = true;
3086                                 pqi_take_device_offline(scmd->device, "AIO");
3087                                 host_byte = DID_NO_CONNECT;
3088                         }
3089                         scsi_status = SAM_STAT_CHECK_CONDITION;
3090                         break;
3091                 case PQI_AIO_STATUS_IO_ERROR:
3092                 default:
3093                         scsi_status = SAM_STAT_CHECK_CONDITION;
3094                         break;
3095                 }
3096                 break;
3097         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
3098         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
3099                 scsi_status = SAM_STAT_GOOD;
3100                 break;
3101         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
3102         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
3103         default:
3104                 scsi_status = SAM_STAT_CHECK_CONDITION;
3105                 break;
3106         }
3107
3108         if (error_info->data_present) {
3109                 sense_data_length =
3110                         get_unaligned_le16(&error_info->data_length);
3111                 if (sense_data_length) {
3112                         if (sense_data_length > sizeof(error_info->data))
3113                                 sense_data_length = sizeof(error_info->data);
3114                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3115                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
3116                         memcpy(scmd->sense_buffer, error_info->data,
3117                                 sense_data_length);
3118                 }
3119         }
3120
3121         if (device_offline && sense_data_length == 0)
3122                 scsi_build_sense(scmd, 0, HARDWARE_ERROR, 0x3e, 0x1);
3123
3124         scmd->result = scsi_status;
3125         set_host_byte(scmd, host_byte);
3126 }
3127
3128 static void pqi_process_io_error(unsigned int iu_type,
3129         struct pqi_io_request *io_request)
3130 {
3131         switch (iu_type) {
3132         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3133                 pqi_process_raid_io_error(io_request);
3134                 break;
3135         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3136                 pqi_process_aio_io_error(io_request);
3137                 break;
3138         }
3139 }
3140
3141 static int pqi_interpret_task_management_response(struct pqi_ctrl_info *ctrl_info,
3142         struct pqi_task_management_response *response)
3143 {
3144         int rc;
3145
3146         switch (response->response_code) {
3147         case SOP_TMF_COMPLETE:
3148         case SOP_TMF_FUNCTION_SUCCEEDED:
3149                 rc = 0;
3150                 break;
3151         case SOP_TMF_REJECTED:
3152                 rc = -EAGAIN;
3153                 break;
3154         default:
3155                 rc = -EIO;
3156                 break;
3157         }
3158
3159         if (rc)
3160                 dev_err(&ctrl_info->pci_dev->dev,
3161                         "Task Management Function error: %d (response code: %u)\n", rc, response->response_code);
3162
3163         return rc;
3164 }
3165
3166 static inline void pqi_invalid_response(struct pqi_ctrl_info *ctrl_info)
3167 {
3168         pqi_take_ctrl_offline(ctrl_info);
3169 }
3170
3171 static int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info, struct pqi_queue_group *queue_group)
3172 {
3173         int num_responses;
3174         pqi_index_t oq_pi;
3175         pqi_index_t oq_ci;
3176         struct pqi_io_request *io_request;
3177         struct pqi_io_response *response;
3178         u16 request_id;
3179
3180         num_responses = 0;
3181         oq_ci = queue_group->oq_ci_copy;
3182
3183         while (1) {
3184                 oq_pi = readl(queue_group->oq_pi);
3185                 if (oq_pi >= ctrl_info->num_elements_per_oq) {
3186                         pqi_invalid_response(ctrl_info);
3187                         dev_err(&ctrl_info->pci_dev->dev,
3188                                 "I/O interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3189                                 oq_pi, ctrl_info->num_elements_per_oq - 1, oq_ci);
3190                         return -1;
3191                 }
3192                 if (oq_pi == oq_ci)
3193                         break;
3194
3195                 num_responses++;
3196                 response = queue_group->oq_element_array +
3197                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3198
3199                 request_id = get_unaligned_le16(&response->request_id);
3200                 if (request_id >= ctrl_info->max_io_slots) {
3201                         pqi_invalid_response(ctrl_info);
3202                         dev_err(&ctrl_info->pci_dev->dev,
3203                                 "request ID in response (%u) out of range (0-%u): producer index: %u  consumer index: %u\n",
3204                                 request_id, ctrl_info->max_io_slots - 1, oq_pi, oq_ci);
3205                         return -1;
3206                 }
3207
3208                 io_request = &ctrl_info->io_request_pool[request_id];
3209                 if (atomic_read(&io_request->refcount) == 0) {
3210                         pqi_invalid_response(ctrl_info);
3211                         dev_err(&ctrl_info->pci_dev->dev,
3212                                 "request ID in response (%u) does not match an outstanding I/O request: producer index: %u  consumer index: %u\n",
3213                                 request_id, oq_pi, oq_ci);
3214                         return -1;
3215                 }
3216
3217                 switch (response->header.iu_type) {
3218                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
3219                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
3220                         if (io_request->scmd)
3221                                 io_request->scmd->result = 0;
3222                         fallthrough;
3223                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
3224                         break;
3225                 case PQI_RESPONSE_IU_VENDOR_GENERAL:
3226                         io_request->status =
3227                                 get_unaligned_le16(
3228                                 &((struct pqi_vendor_general_response *)response)->status);
3229                         break;
3230                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
3231                         io_request->status = pqi_interpret_task_management_response(ctrl_info,
3232                                 (void *)response);
3233                         break;
3234                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
3235                         pqi_aio_path_disabled(io_request);
3236                         io_request->status = -EAGAIN;
3237                         break;
3238                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3239                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3240                         io_request->error_info = ctrl_info->error_buffer +
3241                                 (get_unaligned_le16(&response->error_index) *
3242                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
3243                         pqi_process_io_error(response->header.iu_type, io_request);
3244                         break;
3245                 default:
3246                         pqi_invalid_response(ctrl_info);
3247                         dev_err(&ctrl_info->pci_dev->dev,
3248                                 "unexpected IU type: 0x%x: producer index: %u  consumer index: %u\n",
3249                                 response->header.iu_type, oq_pi, oq_ci);
3250                         return -1;
3251                 }
3252
3253                 io_request->io_complete_callback(io_request, io_request->context);
3254
3255                 /*
3256                  * Note that the I/O request structure CANNOT BE TOUCHED after
3257                  * returning from the I/O completion callback!
3258                  */
3259                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
3260         }
3261
3262         if (num_responses) {
3263                 queue_group->oq_ci_copy = oq_ci;
3264                 writel(oq_ci, queue_group->oq_ci);
3265         }
3266
3267         return num_responses;
3268 }
3269
3270 static inline unsigned int pqi_num_elements_free(unsigned int pi,
3271         unsigned int ci, unsigned int elements_in_queue)
3272 {
3273         unsigned int num_elements_used;
3274
3275         if (pi >= ci)
3276                 num_elements_used = pi - ci;
3277         else
3278                 num_elements_used = elements_in_queue - ci + pi;
3279
3280         return elements_in_queue - num_elements_used - 1;
3281 }
3282
3283 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
3284         struct pqi_event_acknowledge_request *iu, size_t iu_length)
3285 {
3286         pqi_index_t iq_pi;
3287         pqi_index_t iq_ci;
3288         unsigned long flags;
3289         void *next_element;
3290         struct pqi_queue_group *queue_group;
3291
3292         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
3293         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
3294
3295         while (1) {
3296                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
3297
3298                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
3299                 iq_ci = readl(queue_group->iq_ci[RAID_PATH]);
3300
3301                 if (pqi_num_elements_free(iq_pi, iq_ci,
3302                         ctrl_info->num_elements_per_iq))
3303                         break;
3304
3305                 spin_unlock_irqrestore(
3306                         &queue_group->submit_lock[RAID_PATH], flags);
3307
3308                 if (pqi_ctrl_offline(ctrl_info))
3309                         return;
3310         }
3311
3312         next_element = queue_group->iq_element_array[RAID_PATH] +
3313                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3314
3315         memcpy(next_element, iu, iu_length);
3316
3317         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
3318         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
3319
3320         /*
3321          * This write notifies the controller that an IU is available to be
3322          * processed.
3323          */
3324         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
3325
3326         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
3327 }
3328
3329 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
3330         struct pqi_event *event)
3331 {
3332         struct pqi_event_acknowledge_request request;
3333
3334         memset(&request, 0, sizeof(request));
3335
3336         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
3337         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
3338                 &request.header.iu_length);
3339         request.event_type = event->event_type;
3340         put_unaligned_le16(event->event_id, &request.event_id);
3341         put_unaligned_le32(event->additional_event_id, &request.additional_event_id);
3342
3343         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
3344 }
3345
3346 #define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS              30
3347 #define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS        1
3348
3349 static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status(
3350         struct pqi_ctrl_info *ctrl_info)
3351 {
3352         u8 status;
3353         unsigned long timeout;
3354
3355         timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * PQI_HZ) + jiffies;
3356
3357         while (1) {
3358                 status = pqi_read_soft_reset_status(ctrl_info);
3359                 if (status & PQI_SOFT_RESET_INITIATE)
3360                         return RESET_INITIATE_DRIVER;
3361
3362                 if (status & PQI_SOFT_RESET_ABORT)
3363                         return RESET_ABORT;
3364
3365                 if (!sis_is_firmware_running(ctrl_info))
3366                         return RESET_NORESPONSE;
3367
3368                 if (time_after(jiffies, timeout)) {
3369                         dev_warn(&ctrl_info->pci_dev->dev,
3370                                 "timed out waiting for soft reset status\n");
3371                         return RESET_TIMEDOUT;
3372                 }
3373
3374                 ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS);
3375         }
3376 }
3377
3378 static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info)
3379 {
3380         int rc;
3381         unsigned int delay_secs;
3382         enum pqi_soft_reset_status reset_status;
3383
3384         if (ctrl_info->soft_reset_handshake_supported)
3385                 reset_status = pqi_poll_for_soft_reset_status(ctrl_info);
3386         else
3387                 reset_status = RESET_INITIATE_FIRMWARE;
3388
3389         delay_secs = PQI_POST_RESET_DELAY_SECS;
3390
3391         switch (reset_status) {
3392         case RESET_TIMEDOUT:
3393                 delay_secs = PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS;
3394                 fallthrough;
3395         case RESET_INITIATE_DRIVER:
3396                 dev_info(&ctrl_info->pci_dev->dev,
3397                                 "Online Firmware Activation: resetting controller\n");
3398                 sis_soft_reset(ctrl_info);
3399                 fallthrough;
3400         case RESET_INITIATE_FIRMWARE:
3401                 ctrl_info->pqi_mode_enabled = false;
3402                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
3403                 rc = pqi_ofa_ctrl_restart(ctrl_info, delay_secs);
3404                 pqi_ofa_free_host_buffer(ctrl_info);
3405                 pqi_ctrl_ofa_done(ctrl_info);
3406                 dev_info(&ctrl_info->pci_dev->dev,
3407                                 "Online Firmware Activation: %s\n",
3408                                 rc == 0 ? "SUCCESS" : "FAILED");
3409                 break;
3410         case RESET_ABORT:
3411                 dev_info(&ctrl_info->pci_dev->dev,
3412                                 "Online Firmware Activation ABORTED\n");
3413                 if (ctrl_info->soft_reset_handshake_supported)
3414                         pqi_clear_soft_reset_status(ctrl_info);
3415                 pqi_ofa_free_host_buffer(ctrl_info);
3416                 pqi_ctrl_ofa_done(ctrl_info);
3417                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3418                 break;
3419         case RESET_NORESPONSE:
3420                 fallthrough;
3421         default:
3422                 dev_err(&ctrl_info->pci_dev->dev,
3423                         "unexpected Online Firmware Activation reset status: 0x%x\n",
3424                         reset_status);
3425                 pqi_ofa_free_host_buffer(ctrl_info);
3426                 pqi_ctrl_ofa_done(ctrl_info);
3427                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3428                 pqi_take_ctrl_offline(ctrl_info);
3429                 break;
3430         }
3431 }
3432
3433 static void pqi_ofa_memory_alloc_worker(struct work_struct *work)
3434 {
3435         struct pqi_ctrl_info *ctrl_info;
3436
3437         ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_memory_alloc_work);
3438
3439         pqi_ctrl_ofa_start(ctrl_info);
3440         pqi_ofa_setup_host_buffer(ctrl_info);
3441         pqi_ofa_host_memory_update(ctrl_info);
3442 }
3443
3444 static void pqi_ofa_quiesce_worker(struct work_struct *work)
3445 {
3446         struct pqi_ctrl_info *ctrl_info;
3447         struct pqi_event *event;
3448
3449         ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_quiesce_work);
3450
3451         event = &ctrl_info->events[pqi_event_type_to_event_index(PQI_EVENT_TYPE_OFA)];
3452
3453         pqi_ofa_ctrl_quiesce(ctrl_info);
3454         pqi_acknowledge_event(ctrl_info, event);
3455         pqi_process_soft_reset(ctrl_info);
3456 }
3457
3458 static bool pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info,
3459         struct pqi_event *event)
3460 {
3461         bool ack_event;
3462
3463         ack_event = true;
3464
3465         switch (event->event_id) {
3466         case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3467                 dev_info(&ctrl_info->pci_dev->dev,
3468                         "received Online Firmware Activation memory allocation request\n");
3469                 schedule_work(&ctrl_info->ofa_memory_alloc_work);
3470                 break;
3471         case PQI_EVENT_OFA_QUIESCE:
3472                 dev_info(&ctrl_info->pci_dev->dev,
3473                         "received Online Firmware Activation quiesce request\n");
3474                 schedule_work(&ctrl_info->ofa_quiesce_work);
3475                 ack_event = false;
3476                 break;
3477         case PQI_EVENT_OFA_CANCELED:
3478                 dev_info(&ctrl_info->pci_dev->dev,
3479                         "received Online Firmware Activation cancel request: reason: %u\n",
3480                         ctrl_info->ofa_cancel_reason);
3481                 pqi_ofa_free_host_buffer(ctrl_info);
3482                 pqi_ctrl_ofa_done(ctrl_info);
3483                 break;
3484         default:
3485                 dev_err(&ctrl_info->pci_dev->dev,
3486                         "received unknown Online Firmware Activation request: event ID: %u\n",
3487                         event->event_id);
3488                 break;
3489         }
3490
3491         return ack_event;
3492 }
3493
3494 static void pqi_event_worker(struct work_struct *work)
3495 {
3496         unsigned int i;
3497         bool rescan_needed;
3498         struct pqi_ctrl_info *ctrl_info;
3499         struct pqi_event *event;
3500         bool ack_event;
3501
3502         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
3503
3504         pqi_ctrl_busy(ctrl_info);
3505         pqi_wait_if_ctrl_blocked(ctrl_info);
3506         if (pqi_ctrl_offline(ctrl_info))
3507                 goto out;
3508
3509         rescan_needed = false;
3510         event = ctrl_info->events;
3511         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
3512                 if (event->pending) {
3513                         event->pending = false;
3514                         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3515                                 ack_event = pqi_ofa_process_event(ctrl_info, event);
3516                         } else {
3517                                 ack_event = true;
3518                                 rescan_needed = true;
3519                         }
3520                         if (ack_event)
3521                                 pqi_acknowledge_event(ctrl_info, event);
3522                 }
3523                 event++;
3524         }
3525
3526         if (rescan_needed)
3527                 pqi_schedule_rescan_worker_delayed(ctrl_info);
3528
3529 out:
3530         pqi_ctrl_unbusy(ctrl_info);
3531 }
3532
3533 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * PQI_HZ)
3534
3535 static void pqi_heartbeat_timer_handler(struct timer_list *t)
3536 {
3537         int num_interrupts;
3538         u32 heartbeat_count;
3539         struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t, heartbeat_timer);
3540
3541         pqi_check_ctrl_health(ctrl_info);
3542         if (pqi_ctrl_offline(ctrl_info))
3543                 return;
3544
3545         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
3546         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
3547
3548         if (num_interrupts == ctrl_info->previous_num_interrupts) {
3549                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
3550                         dev_err(&ctrl_info->pci_dev->dev,
3551                                 "no heartbeat detected - last heartbeat count: %u\n",
3552                                 heartbeat_count);
3553                         pqi_take_ctrl_offline(ctrl_info);
3554                         return;
3555                 }
3556         } else {
3557                 ctrl_info->previous_num_interrupts = num_interrupts;
3558         }
3559
3560         ctrl_info->previous_heartbeat_count = heartbeat_count;
3561         mod_timer(&ctrl_info->heartbeat_timer,
3562                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
3563 }
3564
3565 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3566 {
3567         if (!ctrl_info->heartbeat_counter)
3568                 return;
3569
3570         ctrl_info->previous_num_interrupts =
3571                 atomic_read(&ctrl_info->num_interrupts);
3572         ctrl_info->previous_heartbeat_count =
3573                 pqi_read_heartbeat_counter(ctrl_info);
3574
3575         ctrl_info->heartbeat_timer.expires =
3576                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
3577         add_timer(&ctrl_info->heartbeat_timer);
3578 }
3579
3580 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3581 {
3582         del_timer_sync(&ctrl_info->heartbeat_timer);
3583 }
3584
3585 static void pqi_ofa_capture_event_payload(struct pqi_ctrl_info *ctrl_info,
3586         struct pqi_event *event, struct pqi_event_response *response)
3587 {
3588         switch (event->event_id) {
3589         case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3590                 ctrl_info->ofa_bytes_requested =
3591                         get_unaligned_le32(&response->data.ofa_memory_allocation.bytes_requested);
3592                 break;
3593         case PQI_EVENT_OFA_CANCELED:
3594                 ctrl_info->ofa_cancel_reason =
3595                         get_unaligned_le16(&response->data.ofa_cancelled.reason);
3596                 break;
3597         }
3598 }
3599
3600 static int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
3601 {
3602         int num_events;
3603         pqi_index_t oq_pi;
3604         pqi_index_t oq_ci;
3605         struct pqi_event_queue *event_queue;
3606         struct pqi_event_response *response;
3607         struct pqi_event *event;
3608         int event_index;
3609
3610         event_queue = &ctrl_info->event_queue;
3611         num_events = 0;
3612         oq_ci = event_queue->oq_ci_copy;
3613
3614         while (1) {
3615                 oq_pi = readl(event_queue->oq_pi);
3616                 if (oq_pi >= PQI_NUM_EVENT_QUEUE_ELEMENTS) {
3617                         pqi_invalid_response(ctrl_info);
3618                         dev_err(&ctrl_info->pci_dev->dev,
3619                                 "event interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3620                                 oq_pi, PQI_NUM_EVENT_QUEUE_ELEMENTS - 1, oq_ci);
3621                         return -1;
3622                 }
3623
3624                 if (oq_pi == oq_ci)
3625                         break;
3626
3627                 num_events++;
3628                 response = event_queue->oq_element_array + (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
3629
3630                 event_index = pqi_event_type_to_event_index(response->event_type);
3631
3632                 if (event_index >= 0 && response->request_acknowledge) {
3633                         event = &ctrl_info->events[event_index];
3634                         event->pending = true;
3635                         event->event_type = response->event_type;
3636                         event->event_id = get_unaligned_le16(&response->event_id);
3637                         event->additional_event_id =
3638                                 get_unaligned_le32(&response->additional_event_id);
3639                         if (event->event_type == PQI_EVENT_TYPE_OFA)
3640                                 pqi_ofa_capture_event_payload(ctrl_info, event, response);
3641                 }
3642
3643                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
3644         }
3645
3646         if (num_events) {
3647                 event_queue->oq_ci_copy = oq_ci;
3648                 writel(oq_ci, event_queue->oq_ci);
3649                 schedule_work(&ctrl_info->event_work);
3650         }
3651
3652         return num_events;
3653 }
3654
3655 #define PQI_LEGACY_INTX_MASK    0x1
3656
3657 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info, bool enable_intx)
3658 {
3659         u32 intx_mask;
3660         struct pqi_device_registers __iomem *pqi_registers;
3661         volatile void __iomem *register_addr;
3662
3663         pqi_registers = ctrl_info->pqi_registers;
3664
3665         if (enable_intx)
3666                 register_addr = &pqi_registers->legacy_intx_mask_clear;
3667         else
3668                 register_addr = &pqi_registers->legacy_intx_mask_set;
3669
3670         intx_mask = readl(register_addr);
3671         intx_mask |= PQI_LEGACY_INTX_MASK;
3672         writel(intx_mask, register_addr);
3673 }
3674
3675 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3676         enum pqi_irq_mode new_mode)
3677 {
3678         switch (ctrl_info->irq_mode) {
3679         case IRQ_MODE_MSIX:
3680                 switch (new_mode) {
3681                 case IRQ_MODE_MSIX:
3682                         break;
3683                 case IRQ_MODE_INTX:
3684                         pqi_configure_legacy_intx(ctrl_info, true);
3685                         sis_enable_intx(ctrl_info);
3686                         break;
3687                 case IRQ_MODE_NONE:
3688                         break;
3689                 }
3690                 break;
3691         case IRQ_MODE_INTX:
3692                 switch (new_mode) {
3693                 case IRQ_MODE_MSIX:
3694                         pqi_configure_legacy_intx(ctrl_info, false);
3695                         sis_enable_msix(ctrl_info);
3696                         break;
3697                 case IRQ_MODE_INTX:
3698                         break;
3699                 case IRQ_MODE_NONE:
3700                         pqi_configure_legacy_intx(ctrl_info, false);
3701                         break;
3702                 }
3703                 break;
3704         case IRQ_MODE_NONE:
3705                 switch (new_mode) {
3706                 case IRQ_MODE_MSIX:
3707                         sis_enable_msix(ctrl_info);
3708                         break;
3709                 case IRQ_MODE_INTX:
3710                         pqi_configure_legacy_intx(ctrl_info, true);
3711                         sis_enable_intx(ctrl_info);
3712                         break;
3713                 case IRQ_MODE_NONE:
3714                         break;
3715                 }
3716                 break;
3717         }
3718
3719         ctrl_info->irq_mode = new_mode;
3720 }
3721
3722 #define PQI_LEGACY_INTX_PENDING         0x1
3723
3724 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3725 {
3726         bool valid_irq;
3727         u32 intx_status;
3728
3729         switch (ctrl_info->irq_mode) {
3730         case IRQ_MODE_MSIX:
3731                 valid_irq = true;
3732                 break;
3733         case IRQ_MODE_INTX:
3734                 intx_status = readl(&ctrl_info->pqi_registers->legacy_intx_status);
3735                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3736                         valid_irq = true;
3737                 else
3738                         valid_irq = false;
3739                 break;
3740         case IRQ_MODE_NONE:
3741         default:
3742                 valid_irq = false;
3743                 break;
3744         }
3745
3746         return valid_irq;
3747 }
3748
3749 static irqreturn_t pqi_irq_handler(int irq, void *data)
3750 {
3751         struct pqi_ctrl_info *ctrl_info;
3752         struct pqi_queue_group *queue_group;
3753         int num_io_responses_handled;
3754         int num_events_handled;
3755
3756         queue_group = data;
3757         ctrl_info = queue_group->ctrl_info;
3758
3759         if (!pqi_is_valid_irq(ctrl_info))
3760                 return IRQ_NONE;
3761
3762         num_io_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3763         if (num_io_responses_handled < 0)
3764                 goto out;
3765
3766         if (irq == ctrl_info->event_irq) {
3767                 num_events_handled = pqi_process_event_intr(ctrl_info);
3768                 if (num_events_handled < 0)
3769                         goto out;
3770         } else {
3771                 num_events_handled = 0;
3772         }
3773
3774         if (num_io_responses_handled + num_events_handled > 0)
3775                 atomic_inc(&ctrl_info->num_interrupts);
3776
3777         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3778         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3779
3780 out:
3781         return IRQ_HANDLED;
3782 }
3783
3784 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3785 {
3786         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3787         int i;
3788         int rc;
3789
3790         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3791
3792         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3793                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3794                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3795                 if (rc) {
3796                         dev_err(&pci_dev->dev,
3797                                 "irq %u init failed with error %d\n",
3798                                 pci_irq_vector(pci_dev, i), rc);
3799                         return rc;
3800                 }
3801                 ctrl_info->num_msix_vectors_initialized++;
3802         }
3803
3804         return 0;
3805 }
3806
3807 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3808 {
3809         int i;
3810
3811         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3812                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3813                         &ctrl_info->queue_groups[i]);
3814
3815         ctrl_info->num_msix_vectors_initialized = 0;
3816 }
3817
3818 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3819 {
3820         int num_vectors_enabled;
3821
3822         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3823                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3824                         PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3825         if (num_vectors_enabled < 0) {
3826                 dev_err(&ctrl_info->pci_dev->dev,
3827                         "MSI-X init failed with error %d\n",
3828                         num_vectors_enabled);
3829                 return num_vectors_enabled;
3830         }
3831
3832         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
3833         ctrl_info->irq_mode = IRQ_MODE_MSIX;
3834         return 0;
3835 }
3836
3837 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3838 {
3839         if (ctrl_info->num_msix_vectors_enabled) {
3840                 pci_free_irq_vectors(ctrl_info->pci_dev);
3841                 ctrl_info->num_msix_vectors_enabled = 0;
3842         }
3843 }
3844
3845 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
3846 {
3847         unsigned int i;
3848         size_t alloc_length;
3849         size_t element_array_length_per_iq;
3850         size_t element_array_length_per_oq;
3851         void *element_array;
3852         void __iomem *next_queue_index;
3853         void *aligned_pointer;
3854         unsigned int num_inbound_queues;
3855         unsigned int num_outbound_queues;
3856         unsigned int num_queue_indexes;
3857         struct pqi_queue_group *queue_group;
3858
3859         element_array_length_per_iq =
3860                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
3861                 ctrl_info->num_elements_per_iq;
3862         element_array_length_per_oq =
3863                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
3864                 ctrl_info->num_elements_per_oq;
3865         num_inbound_queues = ctrl_info->num_queue_groups * 2;
3866         num_outbound_queues = ctrl_info->num_queue_groups;
3867         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3868
3869         aligned_pointer = NULL;
3870
3871         for (i = 0; i < num_inbound_queues; i++) {
3872                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3873                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3874                 aligned_pointer += element_array_length_per_iq;
3875         }
3876
3877         for (i = 0; i < num_outbound_queues; i++) {
3878                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3879                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3880                 aligned_pointer += element_array_length_per_oq;
3881         }
3882
3883         aligned_pointer = PTR_ALIGN(aligned_pointer,
3884                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3885         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3886                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3887
3888         for (i = 0; i < num_queue_indexes; i++) {
3889                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3890                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3891                 aligned_pointer += sizeof(pqi_index_t);
3892         }
3893
3894         alloc_length = (size_t)aligned_pointer +
3895                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3896
3897         alloc_length += PQI_EXTRA_SGL_MEMORY;
3898
3899         ctrl_info->queue_memory_base =
3900                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
3901                                    &ctrl_info->queue_memory_base_dma_handle,
3902                                    GFP_KERNEL);
3903
3904         if (!ctrl_info->queue_memory_base)
3905                 return -ENOMEM;
3906
3907         ctrl_info->queue_memory_length = alloc_length;
3908
3909         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3910                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3911
3912         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3913                 queue_group = &ctrl_info->queue_groups[i];
3914                 queue_group->iq_element_array[RAID_PATH] = element_array;
3915                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
3916                         ctrl_info->queue_memory_base_dma_handle +
3917                                 (element_array - ctrl_info->queue_memory_base);
3918                 element_array += element_array_length_per_iq;
3919                 element_array = PTR_ALIGN(element_array,
3920                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3921                 queue_group->iq_element_array[AIO_PATH] = element_array;
3922                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
3923                         ctrl_info->queue_memory_base_dma_handle +
3924                         (element_array - ctrl_info->queue_memory_base);
3925                 element_array += element_array_length_per_iq;
3926                 element_array = PTR_ALIGN(element_array,
3927                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3928         }
3929
3930         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3931                 queue_group = &ctrl_info->queue_groups[i];
3932                 queue_group->oq_element_array = element_array;
3933                 queue_group->oq_element_array_bus_addr =
3934                         ctrl_info->queue_memory_base_dma_handle +
3935                         (element_array - ctrl_info->queue_memory_base);
3936                 element_array += element_array_length_per_oq;
3937                 element_array = PTR_ALIGN(element_array,
3938                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3939         }
3940
3941         ctrl_info->event_queue.oq_element_array = element_array;
3942         ctrl_info->event_queue.oq_element_array_bus_addr =
3943                 ctrl_info->queue_memory_base_dma_handle +
3944                 (element_array - ctrl_info->queue_memory_base);
3945         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3946                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3947
3948         next_queue_index = (void __iomem *)PTR_ALIGN(element_array,
3949                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
3950
3951         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3952                 queue_group = &ctrl_info->queue_groups[i];
3953                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
3954                 queue_group->iq_ci_bus_addr[RAID_PATH] =
3955                         ctrl_info->queue_memory_base_dma_handle +
3956                         (next_queue_index -
3957                         (void __iomem *)ctrl_info->queue_memory_base);
3958                 next_queue_index += sizeof(pqi_index_t);
3959                 next_queue_index = PTR_ALIGN(next_queue_index,
3960                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3961                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
3962                 queue_group->iq_ci_bus_addr[AIO_PATH] =
3963                         ctrl_info->queue_memory_base_dma_handle +
3964                         (next_queue_index -
3965                         (void __iomem *)ctrl_info->queue_memory_base);
3966                 next_queue_index += sizeof(pqi_index_t);
3967                 next_queue_index = PTR_ALIGN(next_queue_index,
3968                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3969                 queue_group->oq_pi = next_queue_index;
3970                 queue_group->oq_pi_bus_addr =
3971                         ctrl_info->queue_memory_base_dma_handle +
3972                         (next_queue_index -
3973                         (void __iomem *)ctrl_info->queue_memory_base);
3974                 next_queue_index += sizeof(pqi_index_t);
3975                 next_queue_index = PTR_ALIGN(next_queue_index,
3976                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3977         }
3978
3979         ctrl_info->event_queue.oq_pi = next_queue_index;
3980         ctrl_info->event_queue.oq_pi_bus_addr =
3981                 ctrl_info->queue_memory_base_dma_handle +
3982                 (next_queue_index -
3983                 (void __iomem *)ctrl_info->queue_memory_base);
3984
3985         return 0;
3986 }
3987
3988 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3989 {
3990         unsigned int i;
3991         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3992         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3993
3994         /*
3995          * Initialize the backpointers to the controller structure in
3996          * each operational queue group structure.
3997          */
3998         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3999                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
4000
4001         /*
4002          * Assign IDs to all operational queues.  Note that the IDs
4003          * assigned to operational IQs are independent of the IDs
4004          * assigned to operational OQs.
4005          */
4006         ctrl_info->event_queue.oq_id = next_oq_id++;
4007         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4008                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
4009                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
4010                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
4011         }
4012
4013         /*
4014          * Assign MSI-X table entry indexes to all queues.  Note that the
4015          * interrupt for the event queue is shared with the first queue group.
4016          */
4017         ctrl_info->event_queue.int_msg_num = 0;
4018         for (i = 0; i < ctrl_info->num_queue_groups; i++)
4019                 ctrl_info->queue_groups[i].int_msg_num = i;
4020
4021         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4022                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
4023                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
4024                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
4025                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
4026         }
4027 }
4028
4029 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
4030 {
4031         size_t alloc_length;
4032         struct pqi_admin_queues_aligned *admin_queues_aligned;
4033         struct pqi_admin_queues *admin_queues;
4034
4035         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
4036                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
4037
4038         ctrl_info->admin_queue_memory_base =
4039                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
4040                                    &ctrl_info->admin_queue_memory_base_dma_handle,
4041                                    GFP_KERNEL);
4042
4043         if (!ctrl_info->admin_queue_memory_base)
4044                 return -ENOMEM;
4045
4046         ctrl_info->admin_queue_memory_length = alloc_length;
4047
4048         admin_queues = &ctrl_info->admin_queues;
4049         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
4050                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4051         admin_queues->iq_element_array =
4052                 &admin_queues_aligned->iq_element_array;
4053         admin_queues->oq_element_array =
4054                 &admin_queues_aligned->oq_element_array;
4055         admin_queues->iq_ci =
4056                 (pqi_index_t __iomem *)&admin_queues_aligned->iq_ci;
4057         admin_queues->oq_pi =
4058                 (pqi_index_t __iomem *)&admin_queues_aligned->oq_pi;
4059
4060         admin_queues->iq_element_array_bus_addr =
4061                 ctrl_info->admin_queue_memory_base_dma_handle +
4062                 (admin_queues->iq_element_array -
4063                 ctrl_info->admin_queue_memory_base);
4064         admin_queues->oq_element_array_bus_addr =
4065                 ctrl_info->admin_queue_memory_base_dma_handle +
4066                 (admin_queues->oq_element_array -
4067                 ctrl_info->admin_queue_memory_base);
4068         admin_queues->iq_ci_bus_addr =
4069                 ctrl_info->admin_queue_memory_base_dma_handle +
4070                 ((void __iomem *)admin_queues->iq_ci -
4071                 (void __iomem *)ctrl_info->admin_queue_memory_base);
4072         admin_queues->oq_pi_bus_addr =
4073                 ctrl_info->admin_queue_memory_base_dma_handle +
4074                 ((void __iomem *)admin_queues->oq_pi -
4075                 (void __iomem *)ctrl_info->admin_queue_memory_base);
4076
4077         return 0;
4078 }
4079
4080 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          PQI_HZ
4081 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
4082
4083 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
4084 {
4085         struct pqi_device_registers __iomem *pqi_registers;
4086         struct pqi_admin_queues *admin_queues;
4087         unsigned long timeout;
4088         u8 status;
4089         u32 reg;
4090
4091         pqi_registers = ctrl_info->pqi_registers;
4092         admin_queues = &ctrl_info->admin_queues;
4093
4094         writeq((u64)admin_queues->iq_element_array_bus_addr,
4095                 &pqi_registers->admin_iq_element_array_addr);
4096         writeq((u64)admin_queues->oq_element_array_bus_addr,
4097                 &pqi_registers->admin_oq_element_array_addr);
4098         writeq((u64)admin_queues->iq_ci_bus_addr,
4099                 &pqi_registers->admin_iq_ci_addr);
4100         writeq((u64)admin_queues->oq_pi_bus_addr,
4101                 &pqi_registers->admin_oq_pi_addr);
4102
4103         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
4104                 (PQI_ADMIN_OQ_NUM_ELEMENTS << 8) |
4105                 (admin_queues->int_msg_num << 16);
4106         writel(reg, &pqi_registers->admin_iq_num_elements);
4107
4108         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
4109                 &pqi_registers->function_and_status_code);
4110
4111         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
4112         while (1) {
4113                 status = readb(&pqi_registers->function_and_status_code);
4114                 if (status == PQI_STATUS_IDLE)
4115                         break;
4116                 if (time_after(jiffies, timeout))
4117                         return -ETIMEDOUT;
4118                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
4119         }
4120
4121         /*
4122          * The offset registers are not initialized to the correct
4123          * offsets until *after* the create admin queue pair command
4124          * completes successfully.
4125          */
4126         admin_queues->iq_pi = ctrl_info->iomem_base +
4127                 PQI_DEVICE_REGISTERS_OFFSET +
4128                 readq(&pqi_registers->admin_iq_pi_offset);
4129         admin_queues->oq_ci = ctrl_info->iomem_base +
4130                 PQI_DEVICE_REGISTERS_OFFSET +
4131                 readq(&pqi_registers->admin_oq_ci_offset);
4132
4133         return 0;
4134 }
4135
4136 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
4137         struct pqi_general_admin_request *request)
4138 {
4139         struct pqi_admin_queues *admin_queues;
4140         void *next_element;
4141         pqi_index_t iq_pi;
4142
4143         admin_queues = &ctrl_info->admin_queues;
4144         iq_pi = admin_queues->iq_pi_copy;
4145
4146         next_element = admin_queues->iq_element_array +
4147                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
4148
4149         memcpy(next_element, request, sizeof(*request));
4150
4151         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
4152         admin_queues->iq_pi_copy = iq_pi;
4153
4154         /*
4155          * This write notifies the controller that an IU is available to be
4156          * processed.
4157          */
4158         writel(iq_pi, admin_queues->iq_pi);
4159 }
4160
4161 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
4162
4163 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
4164         struct pqi_general_admin_response *response)
4165 {
4166         struct pqi_admin_queues *admin_queues;
4167         pqi_index_t oq_pi;
4168         pqi_index_t oq_ci;
4169         unsigned long timeout;
4170
4171         admin_queues = &ctrl_info->admin_queues;
4172         oq_ci = admin_queues->oq_ci_copy;
4173
4174         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * PQI_HZ) + jiffies;
4175
4176         while (1) {
4177                 oq_pi = readl(admin_queues->oq_pi);
4178                 if (oq_pi != oq_ci)
4179                         break;
4180                 if (time_after(jiffies, timeout)) {
4181                         dev_err(&ctrl_info->pci_dev->dev,
4182                                 "timed out waiting for admin response\n");
4183                         return -ETIMEDOUT;
4184                 }
4185                 if (!sis_is_firmware_running(ctrl_info))
4186                         return -ENXIO;
4187                 usleep_range(1000, 2000);
4188         }
4189
4190         memcpy(response, admin_queues->oq_element_array +
4191                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
4192
4193         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
4194         admin_queues->oq_ci_copy = oq_ci;
4195         writel(oq_ci, admin_queues->oq_ci);
4196
4197         return 0;
4198 }
4199
4200 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
4201         struct pqi_queue_group *queue_group, enum pqi_io_path path,
4202         struct pqi_io_request *io_request)
4203 {
4204         struct pqi_io_request *next;
4205         void *next_element;
4206         pqi_index_t iq_pi;
4207         pqi_index_t iq_ci;
4208         size_t iu_length;
4209         unsigned long flags;
4210         unsigned int num_elements_needed;
4211         unsigned int num_elements_to_end_of_queue;
4212         size_t copy_count;
4213         struct pqi_iu_header *request;
4214
4215         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
4216
4217         if (io_request) {
4218                 io_request->queue_group = queue_group;
4219                 list_add_tail(&io_request->request_list_entry,
4220                         &queue_group->request_list[path]);
4221         }
4222
4223         iq_pi = queue_group->iq_pi_copy[path];
4224
4225         list_for_each_entry_safe(io_request, next,
4226                 &queue_group->request_list[path], request_list_entry) {
4227
4228                 request = io_request->iu;
4229
4230                 iu_length = get_unaligned_le16(&request->iu_length) +
4231                         PQI_REQUEST_HEADER_LENGTH;
4232                 num_elements_needed =
4233                         DIV_ROUND_UP(iu_length,
4234                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4235
4236                 iq_ci = readl(queue_group->iq_ci[path]);
4237
4238                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
4239                         ctrl_info->num_elements_per_iq))
4240                         break;
4241
4242                 put_unaligned_le16(queue_group->oq_id,
4243                         &request->response_queue_id);
4244
4245                 next_element = queue_group->iq_element_array[path] +
4246                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4247
4248                 num_elements_to_end_of_queue =
4249                         ctrl_info->num_elements_per_iq - iq_pi;
4250
4251                 if (num_elements_needed <= num_elements_to_end_of_queue) {
4252                         memcpy(next_element, request, iu_length);
4253                 } else {
4254                         copy_count = num_elements_to_end_of_queue *
4255                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4256                         memcpy(next_element, request, copy_count);
4257                         memcpy(queue_group->iq_element_array[path],
4258                                 (u8 *)request + copy_count,
4259                                 iu_length - copy_count);
4260                 }
4261
4262                 iq_pi = (iq_pi + num_elements_needed) %
4263                         ctrl_info->num_elements_per_iq;
4264
4265                 list_del(&io_request->request_list_entry);
4266         }
4267
4268         if (iq_pi != queue_group->iq_pi_copy[path]) {
4269                 queue_group->iq_pi_copy[path] = iq_pi;
4270                 /*
4271                  * This write notifies the controller that one or more IUs are
4272                  * available to be processed.
4273                  */
4274                 writel(iq_pi, queue_group->iq_pi[path]);
4275         }
4276
4277         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
4278 }
4279
4280 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
4281
4282 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
4283         struct completion *wait)
4284 {
4285         int rc;
4286
4287         while (1) {
4288                 if (wait_for_completion_io_timeout(wait,
4289                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * PQI_HZ)) {
4290                         rc = 0;
4291                         break;
4292                 }
4293
4294                 pqi_check_ctrl_health(ctrl_info);
4295                 if (pqi_ctrl_offline(ctrl_info)) {
4296                         rc = -ENXIO;
4297                         break;
4298                 }
4299         }
4300
4301         return rc;
4302 }
4303
4304 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
4305         void *context)
4306 {
4307         struct completion *waiting = context;
4308
4309         complete(waiting);
4310 }
4311
4312 static int pqi_process_raid_io_error_synchronous(
4313         struct pqi_raid_error_info *error_info)
4314 {
4315         int rc = -EIO;
4316
4317         switch (error_info->data_out_result) {
4318         case PQI_DATA_IN_OUT_GOOD:
4319                 if (error_info->status == SAM_STAT_GOOD)
4320                         rc = 0;
4321                 break;
4322         case PQI_DATA_IN_OUT_UNDERFLOW:
4323                 if (error_info->status == SAM_STAT_GOOD ||
4324                         error_info->status == SAM_STAT_CHECK_CONDITION)
4325                         rc = 0;
4326                 break;
4327         case PQI_DATA_IN_OUT_ABORTED:
4328                 rc = PQI_CMD_STATUS_ABORTED;
4329                 break;
4330         }
4331
4332         return rc;
4333 }
4334
4335 static inline bool pqi_is_blockable_request(struct pqi_iu_header *request)
4336 {
4337         return (request->driver_flags & PQI_DRIVER_NONBLOCKABLE_REQUEST) == 0;
4338 }
4339
4340 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
4341         struct pqi_iu_header *request, unsigned int flags,
4342         struct pqi_raid_error_info *error_info)
4343 {
4344         int rc = 0;
4345         struct pqi_io_request *io_request;
4346         size_t iu_length;
4347         DECLARE_COMPLETION_ONSTACK(wait);
4348
4349         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
4350                 if (down_interruptible(&ctrl_info->sync_request_sem))
4351                         return -ERESTARTSYS;
4352         } else {
4353                 down(&ctrl_info->sync_request_sem);
4354         }
4355
4356         pqi_ctrl_busy(ctrl_info);
4357         /*
4358          * Wait for other admin queue updates such as;
4359          * config table changes, OFA memory updates, ...
4360          */
4361         if (pqi_is_blockable_request(request))
4362                 pqi_wait_if_ctrl_blocked(ctrl_info);
4363
4364         if (pqi_ctrl_offline(ctrl_info)) {
4365                 rc = -ENXIO;
4366                 goto out;
4367         }
4368
4369         io_request = pqi_alloc_io_request(ctrl_info);
4370
4371         put_unaligned_le16(io_request->index,
4372                 &(((struct pqi_raid_path_request *)request)->request_id));
4373
4374         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
4375                 ((struct pqi_raid_path_request *)request)->error_index =
4376                         ((struct pqi_raid_path_request *)request)->request_id;
4377
4378         iu_length = get_unaligned_le16(&request->iu_length) +
4379                 PQI_REQUEST_HEADER_LENGTH;
4380         memcpy(io_request->iu, request, iu_length);
4381
4382         io_request->io_complete_callback = pqi_raid_synchronous_complete;
4383         io_request->context = &wait;
4384
4385         pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
4386                 io_request);
4387
4388         pqi_wait_for_completion_io(ctrl_info, &wait);
4389
4390         if (error_info) {
4391                 if (io_request->error_info)
4392                         memcpy(error_info, io_request->error_info, sizeof(*error_info));
4393                 else
4394                         memset(error_info, 0, sizeof(*error_info));
4395         } else if (rc == 0 && io_request->error_info) {
4396                 rc = pqi_process_raid_io_error_synchronous(io_request->error_info);
4397         }
4398
4399         pqi_free_io_request(io_request);
4400
4401 out:
4402         pqi_ctrl_unbusy(ctrl_info);
4403         up(&ctrl_info->sync_request_sem);
4404
4405         return rc;
4406 }
4407
4408 static int pqi_validate_admin_response(
4409         struct pqi_general_admin_response *response, u8 expected_function_code)
4410 {
4411         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
4412                 return -EINVAL;
4413
4414         if (get_unaligned_le16(&response->header.iu_length) !=
4415                 PQI_GENERAL_ADMIN_IU_LENGTH)
4416                 return -EINVAL;
4417
4418         if (response->function_code != expected_function_code)
4419                 return -EINVAL;
4420
4421         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
4422                 return -EINVAL;
4423
4424         return 0;
4425 }
4426
4427 static int pqi_submit_admin_request_synchronous(
4428         struct pqi_ctrl_info *ctrl_info,
4429         struct pqi_general_admin_request *request,
4430         struct pqi_general_admin_response *response)
4431 {
4432         int rc;
4433
4434         pqi_submit_admin_request(ctrl_info, request);
4435
4436         rc = pqi_poll_for_admin_response(ctrl_info, response);
4437
4438         if (rc == 0)
4439                 rc = pqi_validate_admin_response(response, request->function_code);
4440
4441         return rc;
4442 }
4443
4444 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
4445 {
4446         int rc;
4447         struct pqi_general_admin_request request;
4448         struct pqi_general_admin_response response;
4449         struct pqi_device_capability *capability;
4450         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
4451
4452         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
4453         if (!capability)
4454                 return -ENOMEM;
4455
4456         memset(&request, 0, sizeof(request));
4457
4458         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4459         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4460                 &request.header.iu_length);
4461         request.function_code =
4462                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
4463         put_unaligned_le32(sizeof(*capability),
4464                 &request.data.report_device_capability.buffer_length);
4465
4466         rc = pqi_map_single(ctrl_info->pci_dev,
4467                 &request.data.report_device_capability.sg_descriptor,
4468                 capability, sizeof(*capability),
4469                 DMA_FROM_DEVICE);
4470         if (rc)
4471                 goto out;
4472
4473         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, &response);
4474
4475         pqi_pci_unmap(ctrl_info->pci_dev,
4476                 &request.data.report_device_capability.sg_descriptor, 1,
4477                 DMA_FROM_DEVICE);
4478
4479         if (rc)
4480                 goto out;
4481
4482         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
4483                 rc = -EIO;
4484                 goto out;
4485         }
4486
4487         ctrl_info->max_inbound_queues =
4488                 get_unaligned_le16(&capability->max_inbound_queues);
4489         ctrl_info->max_elements_per_iq =
4490                 get_unaligned_le16(&capability->max_elements_per_iq);
4491         ctrl_info->max_iq_element_length =
4492                 get_unaligned_le16(&capability->max_iq_element_length)
4493                 * 16;
4494         ctrl_info->max_outbound_queues =
4495                 get_unaligned_le16(&capability->max_outbound_queues);
4496         ctrl_info->max_elements_per_oq =
4497                 get_unaligned_le16(&capability->max_elements_per_oq);
4498         ctrl_info->max_oq_element_length =
4499                 get_unaligned_le16(&capability->max_oq_element_length)
4500                 * 16;
4501
4502         sop_iu_layer_descriptor =
4503                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
4504
4505         ctrl_info->max_inbound_iu_length_per_firmware =
4506                 get_unaligned_le16(
4507                         &sop_iu_layer_descriptor->max_inbound_iu_length);
4508         ctrl_info->inbound_spanning_supported =
4509                 sop_iu_layer_descriptor->inbound_spanning_supported;
4510         ctrl_info->outbound_spanning_supported =
4511                 sop_iu_layer_descriptor->outbound_spanning_supported;
4512
4513 out:
4514         kfree(capability);
4515
4516         return rc;
4517 }
4518
4519 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
4520 {
4521         if (ctrl_info->max_iq_element_length <
4522                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4523                 dev_err(&ctrl_info->pci_dev->dev,
4524                         "max. inbound queue element length of %d is less than the required length of %d\n",
4525                         ctrl_info->max_iq_element_length,
4526                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4527                 return -EINVAL;
4528         }
4529
4530         if (ctrl_info->max_oq_element_length <
4531                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
4532                 dev_err(&ctrl_info->pci_dev->dev,
4533                         "max. outbound queue element length of %d is less than the required length of %d\n",
4534                         ctrl_info->max_oq_element_length,
4535                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
4536                 return -EINVAL;
4537         }
4538
4539         if (ctrl_info->max_inbound_iu_length_per_firmware <
4540                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4541                 dev_err(&ctrl_info->pci_dev->dev,
4542                         "max. inbound IU length of %u is less than the min. required length of %d\n",
4543                         ctrl_info->max_inbound_iu_length_per_firmware,
4544                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4545                 return -EINVAL;
4546         }
4547
4548         if (!ctrl_info->inbound_spanning_supported) {
4549                 dev_err(&ctrl_info->pci_dev->dev,
4550                         "the controller does not support inbound spanning\n");
4551                 return -EINVAL;
4552         }
4553
4554         if (ctrl_info->outbound_spanning_supported) {
4555                 dev_err(&ctrl_info->pci_dev->dev,
4556                         "the controller supports outbound spanning but this driver does not\n");
4557                 return -EINVAL;
4558         }
4559
4560         return 0;
4561 }
4562
4563 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
4564 {
4565         int rc;
4566         struct pqi_event_queue *event_queue;
4567         struct pqi_general_admin_request request;
4568         struct pqi_general_admin_response response;
4569
4570         event_queue = &ctrl_info->event_queue;
4571
4572         /*
4573          * Create OQ (Outbound Queue - device to host queue) to dedicate
4574          * to events.
4575          */
4576         memset(&request, 0, sizeof(request));
4577         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4578         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4579                 &request.header.iu_length);
4580         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4581         put_unaligned_le16(event_queue->oq_id,
4582                 &request.data.create_operational_oq.queue_id);
4583         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
4584                 &request.data.create_operational_oq.element_array_addr);
4585         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
4586                 &request.data.create_operational_oq.pi_addr);
4587         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
4588                 &request.data.create_operational_oq.num_elements);
4589         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
4590                 &request.data.create_operational_oq.element_length);
4591         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4592         put_unaligned_le16(event_queue->int_msg_num,
4593                 &request.data.create_operational_oq.int_msg_num);
4594
4595         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4596                 &response);
4597         if (rc)
4598                 return rc;
4599
4600         event_queue->oq_ci = ctrl_info->iomem_base +
4601                 PQI_DEVICE_REGISTERS_OFFSET +
4602                 get_unaligned_le64(
4603                         &response.data.create_operational_oq.oq_ci_offset);
4604
4605         return 0;
4606 }
4607
4608 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
4609         unsigned int group_number)
4610 {
4611         int rc;
4612         struct pqi_queue_group *queue_group;
4613         struct pqi_general_admin_request request;
4614         struct pqi_general_admin_response response;
4615
4616         queue_group = &ctrl_info->queue_groups[group_number];
4617
4618         /*
4619          * Create IQ (Inbound Queue - host to device queue) for
4620          * RAID path.
4621          */
4622         memset(&request, 0, sizeof(request));
4623         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4624         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4625                 &request.header.iu_length);
4626         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4627         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
4628                 &request.data.create_operational_iq.queue_id);
4629         put_unaligned_le64(
4630                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
4631                 &request.data.create_operational_iq.element_array_addr);
4632         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
4633                 &request.data.create_operational_iq.ci_addr);
4634         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4635                 &request.data.create_operational_iq.num_elements);
4636         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4637                 &request.data.create_operational_iq.element_length);
4638         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4639
4640         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4641                 &response);
4642         if (rc) {
4643                 dev_err(&ctrl_info->pci_dev->dev,
4644                         "error creating inbound RAID queue\n");
4645                 return rc;
4646         }
4647
4648         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4649                 PQI_DEVICE_REGISTERS_OFFSET +
4650                 get_unaligned_le64(
4651                         &response.data.create_operational_iq.iq_pi_offset);
4652
4653         /*
4654          * Create IQ (Inbound Queue - host to device queue) for
4655          * Advanced I/O (AIO) path.
4656          */
4657         memset(&request, 0, sizeof(request));
4658         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4659         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4660                 &request.header.iu_length);
4661         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4662         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4663                 &request.data.create_operational_iq.queue_id);
4664         put_unaligned_le64((u64)queue_group->
4665                 iq_element_array_bus_addr[AIO_PATH],
4666                 &request.data.create_operational_iq.element_array_addr);
4667         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4668                 &request.data.create_operational_iq.ci_addr);
4669         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4670                 &request.data.create_operational_iq.num_elements);
4671         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4672                 &request.data.create_operational_iq.element_length);
4673         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4674
4675         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4676                 &response);
4677         if (rc) {
4678                 dev_err(&ctrl_info->pci_dev->dev,
4679                         "error creating inbound AIO queue\n");
4680                 return rc;
4681         }
4682
4683         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4684                 PQI_DEVICE_REGISTERS_OFFSET +
4685                 get_unaligned_le64(
4686                         &response.data.create_operational_iq.iq_pi_offset);
4687
4688         /*
4689          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4690          * assumed to be for RAID path I/O unless we change the queue's
4691          * property.
4692          */
4693         memset(&request, 0, sizeof(request));
4694         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4695         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4696                 &request.header.iu_length);
4697         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4698         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4699                 &request.data.change_operational_iq_properties.queue_id);
4700         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4701                 &request.data.change_operational_iq_properties.vendor_specific);
4702
4703         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4704                 &response);
4705         if (rc) {
4706                 dev_err(&ctrl_info->pci_dev->dev,
4707                         "error changing queue property\n");
4708                 return rc;
4709         }
4710
4711         /*
4712          * Create OQ (Outbound Queue - device to host queue).
4713          */
4714         memset(&request, 0, sizeof(request));
4715         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4716         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4717                 &request.header.iu_length);
4718         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4719         put_unaligned_le16(queue_group->oq_id,
4720                 &request.data.create_operational_oq.queue_id);
4721         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4722                 &request.data.create_operational_oq.element_array_addr);
4723         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4724                 &request.data.create_operational_oq.pi_addr);
4725         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4726                 &request.data.create_operational_oq.num_elements);
4727         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4728                 &request.data.create_operational_oq.element_length);
4729         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4730         put_unaligned_le16(queue_group->int_msg_num,
4731                 &request.data.create_operational_oq.int_msg_num);
4732
4733         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4734                 &response);
4735         if (rc) {
4736                 dev_err(&ctrl_info->pci_dev->dev,
4737                         "error creating outbound queue\n");
4738                 return rc;
4739         }
4740
4741         queue_group->oq_ci = ctrl_info->iomem_base +
4742                 PQI_DEVICE_REGISTERS_OFFSET +
4743                 get_unaligned_le64(
4744                         &response.data.create_operational_oq.oq_ci_offset);
4745
4746         return 0;
4747 }
4748
4749 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4750 {
4751         int rc;
4752         unsigned int i;
4753
4754         rc = pqi_create_event_queue(ctrl_info);
4755         if (rc) {
4756                 dev_err(&ctrl_info->pci_dev->dev,
4757                         "error creating event queue\n");
4758                 return rc;
4759         }
4760
4761         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4762                 rc = pqi_create_queue_group(ctrl_info, i);
4763                 if (rc) {
4764                         dev_err(&ctrl_info->pci_dev->dev,
4765                                 "error creating queue group number %u/%u\n",
4766                                 i, ctrl_info->num_queue_groups);
4767                         return rc;
4768                 }
4769         }
4770
4771         return 0;
4772 }
4773
4774 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4775         struct_size((struct pqi_event_config *)0, descriptors, PQI_MAX_EVENT_DESCRIPTORS)
4776
4777 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4778         bool enable_events)
4779 {
4780         int rc;
4781         unsigned int i;
4782         struct pqi_event_config *event_config;
4783         struct pqi_event_descriptor *event_descriptor;
4784         struct pqi_general_management_request request;
4785
4786         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4787                 GFP_KERNEL);
4788         if (!event_config)
4789                 return -ENOMEM;
4790
4791         memset(&request, 0, sizeof(request));
4792
4793         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4794         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4795                 data.report_event_configuration.sg_descriptors[1]) -
4796                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4797         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4798                 &request.data.report_event_configuration.buffer_length);
4799
4800         rc = pqi_map_single(ctrl_info->pci_dev,
4801                 request.data.report_event_configuration.sg_descriptors,
4802                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4803                 DMA_FROM_DEVICE);
4804         if (rc)
4805                 goto out;
4806
4807         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
4808
4809         pqi_pci_unmap(ctrl_info->pci_dev,
4810                 request.data.report_event_configuration.sg_descriptors, 1,
4811                 DMA_FROM_DEVICE);
4812
4813         if (rc)
4814                 goto out;
4815
4816         for (i = 0; i < event_config->num_event_descriptors; i++) {
4817                 event_descriptor = &event_config->descriptors[i];
4818                 if (enable_events &&
4819                         pqi_is_supported_event(event_descriptor->event_type))
4820                                 put_unaligned_le16(ctrl_info->event_queue.oq_id,
4821                                         &event_descriptor->oq_id);
4822                 else
4823                         put_unaligned_le16(0, &event_descriptor->oq_id);
4824         }
4825
4826         memset(&request, 0, sizeof(request));
4827
4828         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4829         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4830                 data.report_event_configuration.sg_descriptors[1]) -
4831                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4832         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4833                 &request.data.report_event_configuration.buffer_length);
4834
4835         rc = pqi_map_single(ctrl_info->pci_dev,
4836                 request.data.report_event_configuration.sg_descriptors,
4837                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4838                 DMA_TO_DEVICE);
4839         if (rc)
4840                 goto out;
4841
4842         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
4843
4844         pqi_pci_unmap(ctrl_info->pci_dev,
4845                 request.data.report_event_configuration.sg_descriptors, 1,
4846                 DMA_TO_DEVICE);
4847
4848 out:
4849         kfree(event_config);
4850
4851         return rc;
4852 }
4853
4854 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
4855 {
4856         return pqi_configure_events(ctrl_info, true);
4857 }
4858
4859 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
4860 {
4861         unsigned int i;
4862         struct device *dev;
4863         size_t sg_chain_buffer_length;
4864         struct pqi_io_request *io_request;
4865
4866         if (!ctrl_info->io_request_pool)
4867                 return;
4868
4869         dev = &ctrl_info->pci_dev->dev;
4870         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4871         io_request = ctrl_info->io_request_pool;
4872
4873         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4874                 kfree(io_request->iu);
4875                 if (!io_request->sg_chain_buffer)
4876                         break;
4877                 dma_free_coherent(dev, sg_chain_buffer_length,
4878                         io_request->sg_chain_buffer,
4879                         io_request->sg_chain_buffer_dma_handle);
4880                 io_request++;
4881         }
4882
4883         kfree(ctrl_info->io_request_pool);
4884         ctrl_info->io_request_pool = NULL;
4885 }
4886
4887 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4888 {
4889         ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev,
4890                                      ctrl_info->error_buffer_length,
4891                                      &ctrl_info->error_buffer_dma_handle,
4892                                      GFP_KERNEL);
4893         if (!ctrl_info->error_buffer)
4894                 return -ENOMEM;
4895
4896         return 0;
4897 }
4898
4899 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4900 {
4901         unsigned int i;
4902         void *sg_chain_buffer;
4903         size_t sg_chain_buffer_length;
4904         dma_addr_t sg_chain_buffer_dma_handle;
4905         struct device *dev;
4906         struct pqi_io_request *io_request;
4907
4908         ctrl_info->io_request_pool = kcalloc(ctrl_info->max_io_slots,
4909                 sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4910
4911         if (!ctrl_info->io_request_pool) {
4912                 dev_err(&ctrl_info->pci_dev->dev,
4913                         "failed to allocate I/O request pool\n");
4914                 goto error;
4915         }
4916
4917         dev = &ctrl_info->pci_dev->dev;
4918         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4919         io_request = ctrl_info->io_request_pool;
4920
4921         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4922                 io_request->iu = kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4923
4924                 if (!io_request->iu) {
4925                         dev_err(&ctrl_info->pci_dev->dev,
4926                                 "failed to allocate IU buffers\n");
4927                         goto error;
4928                 }
4929
4930                 sg_chain_buffer = dma_alloc_coherent(dev,
4931                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4932                         GFP_KERNEL);
4933
4934                 if (!sg_chain_buffer) {
4935                         dev_err(&ctrl_info->pci_dev->dev,
4936                                 "failed to allocate PQI scatter-gather chain buffers\n");
4937                         goto error;
4938                 }
4939
4940                 io_request->index = i;
4941                 io_request->sg_chain_buffer = sg_chain_buffer;
4942                 io_request->sg_chain_buffer_dma_handle = sg_chain_buffer_dma_handle;
4943                 io_request++;
4944         }
4945
4946         return 0;
4947
4948 error:
4949         pqi_free_all_io_requests(ctrl_info);
4950
4951         return -ENOMEM;
4952 }
4953
4954 /*
4955  * Calculate required resources that are sized based on max. outstanding
4956  * requests and max. transfer size.
4957  */
4958
4959 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4960 {
4961         u32 max_transfer_size;
4962         u32 max_sg_entries;
4963
4964         ctrl_info->scsi_ml_can_queue =
4965                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4966         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4967
4968         ctrl_info->error_buffer_length =
4969                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4970
4971         if (reset_devices)
4972                 max_transfer_size = min(ctrl_info->max_transfer_size,
4973                         PQI_MAX_TRANSFER_SIZE_KDUMP);
4974         else
4975                 max_transfer_size = min(ctrl_info->max_transfer_size,
4976                         PQI_MAX_TRANSFER_SIZE);
4977
4978         max_sg_entries = max_transfer_size / PAGE_SIZE;
4979
4980         /* +1 to cover when the buffer is not page-aligned. */
4981         max_sg_entries++;
4982
4983         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4984
4985         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4986
4987         ctrl_info->sg_chain_buffer_length =
4988                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4989                 PQI_EXTRA_SGL_MEMORY;
4990         ctrl_info->sg_tablesize = max_sg_entries;
4991         ctrl_info->max_sectors = max_transfer_size / 512;
4992 }
4993
4994 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4995 {
4996         int num_queue_groups;
4997         u16 num_elements_per_iq;
4998         u16 num_elements_per_oq;
4999
5000         if (reset_devices) {
5001                 num_queue_groups = 1;
5002         } else {
5003                 int num_cpus;
5004                 int max_queue_groups;
5005
5006                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
5007                         ctrl_info->max_outbound_queues - 1);
5008                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
5009
5010                 num_cpus = num_online_cpus();
5011                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
5012                 num_queue_groups = min(num_queue_groups, max_queue_groups);
5013         }
5014
5015         ctrl_info->num_queue_groups = num_queue_groups;
5016         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
5017
5018         /*
5019          * Make sure that the max. inbound IU length is an even multiple
5020          * of our inbound element length.
5021          */
5022         ctrl_info->max_inbound_iu_length =
5023                 (ctrl_info->max_inbound_iu_length_per_firmware /
5024                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
5025                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
5026
5027         num_elements_per_iq =
5028                 (ctrl_info->max_inbound_iu_length /
5029                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
5030
5031         /* Add one because one element in each queue is unusable. */
5032         num_elements_per_iq++;
5033
5034         num_elements_per_iq = min(num_elements_per_iq,
5035                 ctrl_info->max_elements_per_iq);
5036
5037         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
5038         num_elements_per_oq = min(num_elements_per_oq,
5039                 ctrl_info->max_elements_per_oq);
5040
5041         ctrl_info->num_elements_per_iq = num_elements_per_iq;
5042         ctrl_info->num_elements_per_oq = num_elements_per_oq;
5043
5044         ctrl_info->max_sg_per_iu =
5045                 ((ctrl_info->max_inbound_iu_length -
5046                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5047                 sizeof(struct pqi_sg_descriptor)) +
5048                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
5049
5050         ctrl_info->max_sg_per_r56_iu =
5051                 ((ctrl_info->max_inbound_iu_length -
5052                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5053                 sizeof(struct pqi_sg_descriptor)) +
5054                 PQI_MAX_EMBEDDED_R56_SG_DESCRIPTORS;
5055 }
5056
5057 static inline void pqi_set_sg_descriptor(struct pqi_sg_descriptor *sg_descriptor,
5058         struct scatterlist *sg)
5059 {
5060         u64 address = (u64)sg_dma_address(sg);
5061         unsigned int length = sg_dma_len(sg);
5062
5063         put_unaligned_le64(address, &sg_descriptor->address);
5064         put_unaligned_le32(length, &sg_descriptor->length);
5065         put_unaligned_le32(0, &sg_descriptor->flags);
5066 }
5067
5068 static unsigned int pqi_build_sg_list(struct pqi_sg_descriptor *sg_descriptor,
5069         struct scatterlist *sg, int sg_count, struct pqi_io_request *io_request,
5070         int max_sg_per_iu, bool *chained)
5071 {
5072         int i;
5073         unsigned int num_sg_in_iu;
5074
5075         *chained = false;
5076         i = 0;
5077         num_sg_in_iu = 0;
5078         max_sg_per_iu--;        /* Subtract 1 to leave room for chain marker. */
5079
5080         while (1) {
5081                 pqi_set_sg_descriptor(sg_descriptor, sg);
5082                 if (!*chained)
5083                         num_sg_in_iu++;
5084                 i++;
5085                 if (i == sg_count)
5086                         break;
5087                 sg_descriptor++;
5088                 if (i == max_sg_per_iu) {
5089                         put_unaligned_le64((u64)io_request->sg_chain_buffer_dma_handle,
5090                                 &sg_descriptor->address);
5091                         put_unaligned_le32((sg_count - num_sg_in_iu) * sizeof(*sg_descriptor),
5092                                 &sg_descriptor->length);
5093                         put_unaligned_le32(CISS_SG_CHAIN, &sg_descriptor->flags);
5094                         *chained = true;
5095                         num_sg_in_iu++;
5096                         sg_descriptor = io_request->sg_chain_buffer;
5097                 }
5098                 sg = sg_next(sg);
5099         }
5100
5101         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
5102
5103         return num_sg_in_iu;
5104 }
5105
5106 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
5107         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
5108         struct pqi_io_request *io_request)
5109 {
5110         u16 iu_length;
5111         int sg_count;
5112         bool chained;
5113         unsigned int num_sg_in_iu;
5114         struct scatterlist *sg;
5115         struct pqi_sg_descriptor *sg_descriptor;
5116
5117         sg_count = scsi_dma_map(scmd);
5118         if (sg_count < 0)
5119                 return sg_count;
5120
5121         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5122                 PQI_REQUEST_HEADER_LENGTH;
5123
5124         if (sg_count == 0)
5125                 goto out;
5126
5127         sg = scsi_sglist(scmd);
5128         sg_descriptor = request->sg_descriptors;
5129
5130         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5131                 ctrl_info->max_sg_per_iu, &chained);
5132
5133         request->partial = chained;
5134         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5135
5136 out:
5137         put_unaligned_le16(iu_length, &request->header.iu_length);
5138
5139         return 0;
5140 }
5141
5142 static int pqi_build_aio_r1_sg_list(struct pqi_ctrl_info *ctrl_info,
5143         struct pqi_aio_r1_path_request *request, struct scsi_cmnd *scmd,
5144         struct pqi_io_request *io_request)
5145 {
5146         u16 iu_length;
5147         int sg_count;
5148         bool chained;
5149         unsigned int num_sg_in_iu;
5150         struct scatterlist *sg;
5151         struct pqi_sg_descriptor *sg_descriptor;
5152
5153         sg_count = scsi_dma_map(scmd);
5154         if (sg_count < 0)
5155                 return sg_count;
5156
5157         iu_length = offsetof(struct pqi_aio_r1_path_request, sg_descriptors) -
5158                 PQI_REQUEST_HEADER_LENGTH;
5159         num_sg_in_iu = 0;
5160
5161         if (sg_count == 0)
5162                 goto out;
5163
5164         sg = scsi_sglist(scmd);
5165         sg_descriptor = request->sg_descriptors;
5166
5167         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5168                 ctrl_info->max_sg_per_iu, &chained);
5169
5170         request->partial = chained;
5171         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5172
5173 out:
5174         put_unaligned_le16(iu_length, &request->header.iu_length);
5175         request->num_sg_descriptors = num_sg_in_iu;
5176
5177         return 0;
5178 }
5179
5180 static int pqi_build_aio_r56_sg_list(struct pqi_ctrl_info *ctrl_info,
5181         struct pqi_aio_r56_path_request *request, struct scsi_cmnd *scmd,
5182         struct pqi_io_request *io_request)
5183 {
5184         u16 iu_length;
5185         int sg_count;
5186         bool chained;
5187         unsigned int num_sg_in_iu;
5188         struct scatterlist *sg;
5189         struct pqi_sg_descriptor *sg_descriptor;
5190
5191         sg_count = scsi_dma_map(scmd);
5192         if (sg_count < 0)
5193                 return sg_count;
5194
5195         iu_length = offsetof(struct pqi_aio_r56_path_request, sg_descriptors) -
5196                 PQI_REQUEST_HEADER_LENGTH;
5197         num_sg_in_iu = 0;
5198
5199         if (sg_count != 0) {
5200                 sg = scsi_sglist(scmd);
5201                 sg_descriptor = request->sg_descriptors;
5202
5203                 num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5204                         ctrl_info->max_sg_per_r56_iu, &chained);
5205
5206                 request->partial = chained;
5207                 iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5208         }
5209
5210         put_unaligned_le16(iu_length, &request->header.iu_length);
5211         request->num_sg_descriptors = num_sg_in_iu;
5212
5213         return 0;
5214 }
5215
5216 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
5217         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
5218         struct pqi_io_request *io_request)
5219 {
5220         u16 iu_length;
5221         int sg_count;
5222         bool chained;
5223         unsigned int num_sg_in_iu;
5224         struct scatterlist *sg;
5225         struct pqi_sg_descriptor *sg_descriptor;
5226
5227         sg_count = scsi_dma_map(scmd);
5228         if (sg_count < 0)
5229                 return sg_count;
5230
5231         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
5232                 PQI_REQUEST_HEADER_LENGTH;
5233         num_sg_in_iu = 0;
5234
5235         if (sg_count == 0)
5236                 goto out;
5237
5238         sg = scsi_sglist(scmd);
5239         sg_descriptor = request->sg_descriptors;
5240
5241         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5242                 ctrl_info->max_sg_per_iu, &chained);
5243
5244         request->partial = chained;
5245         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5246
5247 out:
5248         put_unaligned_le16(iu_length, &request->header.iu_length);
5249         request->num_sg_descriptors = num_sg_in_iu;
5250
5251         return 0;
5252 }
5253
5254 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
5255         void *context)
5256 {
5257         struct scsi_cmnd *scmd;
5258
5259         scmd = io_request->scmd;
5260         pqi_free_io_request(io_request);
5261         scsi_dma_unmap(scmd);
5262         pqi_scsi_done(scmd);
5263 }
5264
5265 static int pqi_raid_submit_scsi_cmd_with_io_request(
5266         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
5267         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5268         struct pqi_queue_group *queue_group)
5269 {
5270         int rc;
5271         size_t cdb_length;
5272         struct pqi_raid_path_request *request;
5273
5274         io_request->io_complete_callback = pqi_raid_io_complete;
5275         io_request->scmd = scmd;
5276
5277         request = io_request->iu;
5278         memset(request, 0, offsetof(struct pqi_raid_path_request, sg_descriptors));
5279
5280         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5281         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5282         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5283         put_unaligned_le16(io_request->index, &request->request_id);
5284         request->error_index = request->request_id;
5285         memcpy(request->lun_number, device->scsi3addr, sizeof(request->lun_number));
5286
5287         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
5288         memcpy(request->cdb, scmd->cmnd, cdb_length);
5289
5290         switch (cdb_length) {
5291         case 6:
5292         case 10:
5293         case 12:
5294         case 16:
5295                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5296                 break;
5297         case 20:
5298                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_4;
5299                 break;
5300         case 24:
5301                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_8;
5302                 break;
5303         case 28:
5304                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_12;
5305                 break;
5306         case 32:
5307         default:
5308                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_16;
5309                 break;
5310         }
5311
5312         switch (scmd->sc_data_direction) {
5313         case DMA_TO_DEVICE:
5314                 request->data_direction = SOP_READ_FLAG;
5315                 break;
5316         case DMA_FROM_DEVICE:
5317                 request->data_direction = SOP_WRITE_FLAG;
5318                 break;
5319         case DMA_NONE:
5320                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5321                 break;
5322         case DMA_BIDIRECTIONAL:
5323                 request->data_direction = SOP_BIDIRECTIONAL;
5324                 break;
5325         default:
5326                 dev_err(&ctrl_info->pci_dev->dev,
5327                         "unknown data direction: %d\n",
5328                         scmd->sc_data_direction);
5329                 break;
5330         }
5331
5332         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
5333         if (rc) {
5334                 pqi_free_io_request(io_request);
5335                 return SCSI_MLQUEUE_HOST_BUSY;
5336         }
5337
5338         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
5339
5340         return 0;
5341 }
5342
5343 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5344         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5345         struct pqi_queue_group *queue_group)
5346 {
5347         struct pqi_io_request *io_request;
5348
5349         io_request = pqi_alloc_io_request(ctrl_info);
5350
5351         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5352                 device, scmd, queue_group);
5353 }
5354
5355 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
5356 {
5357         struct scsi_cmnd *scmd;
5358         struct pqi_scsi_dev *device;
5359         struct pqi_ctrl_info *ctrl_info;
5360
5361         if (!io_request->raid_bypass)
5362                 return false;
5363
5364         scmd = io_request->scmd;
5365         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
5366                 return false;
5367         if (host_byte(scmd->result) == DID_NO_CONNECT)
5368                 return false;
5369
5370         device = scmd->device->hostdata;
5371         if (pqi_device_offline(device) || pqi_device_in_remove(device))
5372                 return false;
5373
5374         ctrl_info = shost_to_hba(scmd->device->host);
5375         if (pqi_ctrl_offline(ctrl_info))
5376                 return false;
5377
5378         return true;
5379 }
5380
5381 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
5382         void *context)
5383 {
5384         struct scsi_cmnd *scmd;
5385
5386         scmd = io_request->scmd;
5387         scsi_dma_unmap(scmd);
5388         if (io_request->status == -EAGAIN || pqi_raid_bypass_retry_needed(io_request)) {
5389                 set_host_byte(scmd, DID_IMM_RETRY);
5390                 scmd->SCp.this_residual++;
5391         }
5392
5393         pqi_free_io_request(io_request);
5394         pqi_scsi_done(scmd);
5395 }
5396
5397 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5398         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5399         struct pqi_queue_group *queue_group)
5400 {
5401         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
5402                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
5403 }
5404
5405 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
5406         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
5407         unsigned int cdb_length, struct pqi_queue_group *queue_group,
5408         struct pqi_encryption_info *encryption_info, bool raid_bypass)
5409 {
5410         int rc;
5411         struct pqi_io_request *io_request;
5412         struct pqi_aio_path_request *request;
5413
5414         io_request = pqi_alloc_io_request(ctrl_info);
5415         io_request->io_complete_callback = pqi_aio_io_complete;
5416         io_request->scmd = scmd;
5417         io_request->raid_bypass = raid_bypass;
5418
5419         request = io_request->iu;
5420         memset(request, 0, offsetof(struct pqi_raid_path_request, sg_descriptors));
5421
5422         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
5423         put_unaligned_le32(aio_handle, &request->nexus_id);
5424         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5425         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5426         put_unaligned_le16(io_request->index, &request->request_id);
5427         request->error_index = request->request_id;
5428         if (cdb_length > sizeof(request->cdb))
5429                 cdb_length = sizeof(request->cdb);
5430         request->cdb_length = cdb_length;
5431         memcpy(request->cdb, cdb, cdb_length);
5432
5433         switch (scmd->sc_data_direction) {
5434         case DMA_TO_DEVICE:
5435                 request->data_direction = SOP_READ_FLAG;
5436                 break;
5437         case DMA_FROM_DEVICE:
5438                 request->data_direction = SOP_WRITE_FLAG;
5439                 break;
5440         case DMA_NONE:
5441                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5442                 break;
5443         case DMA_BIDIRECTIONAL:
5444                 request->data_direction = SOP_BIDIRECTIONAL;
5445                 break;
5446         default:
5447                 dev_err(&ctrl_info->pci_dev->dev,
5448                         "unknown data direction: %d\n",
5449                         scmd->sc_data_direction);
5450                 break;
5451         }
5452
5453         if (encryption_info) {
5454                 request->encryption_enable = true;
5455                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5456                         &request->data_encryption_key_index);
5457                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5458                         &request->encrypt_tweak_lower);
5459                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5460                         &request->encrypt_tweak_upper);
5461         }
5462
5463         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
5464         if (rc) {
5465                 pqi_free_io_request(io_request);
5466                 return SCSI_MLQUEUE_HOST_BUSY;
5467         }
5468
5469         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5470
5471         return 0;
5472 }
5473
5474 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
5475         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5476         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5477         struct pqi_scsi_dev_raid_map_data *rmd)
5478 {
5479         int rc;
5480         struct pqi_io_request *io_request;
5481         struct pqi_aio_r1_path_request *r1_request;
5482
5483         io_request = pqi_alloc_io_request(ctrl_info);
5484         io_request->io_complete_callback = pqi_aio_io_complete;
5485         io_request->scmd = scmd;
5486         io_request->raid_bypass = true;
5487
5488         r1_request = io_request->iu;
5489         memset(r1_request, 0, offsetof(struct pqi_aio_r1_path_request, sg_descriptors));
5490
5491         r1_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID1_IO;
5492         put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r1_request->volume_id);
5493         r1_request->num_drives = rmd->num_it_nexus_entries;
5494         put_unaligned_le32(rmd->it_nexus[0], &r1_request->it_nexus_1);
5495         put_unaligned_le32(rmd->it_nexus[1], &r1_request->it_nexus_2);
5496         if (rmd->num_it_nexus_entries == 3)
5497                 put_unaligned_le32(rmd->it_nexus[2], &r1_request->it_nexus_3);
5498
5499         put_unaligned_le32(scsi_bufflen(scmd), &r1_request->data_length);
5500         r1_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5501         put_unaligned_le16(io_request->index, &r1_request->request_id);
5502         r1_request->error_index = r1_request->request_id;
5503         if (rmd->cdb_length > sizeof(r1_request->cdb))
5504                 rmd->cdb_length = sizeof(r1_request->cdb);
5505         r1_request->cdb_length = rmd->cdb_length;
5506         memcpy(r1_request->cdb, rmd->cdb, rmd->cdb_length);
5507
5508         /* The direction is always write. */
5509         r1_request->data_direction = SOP_READ_FLAG;
5510
5511         if (encryption_info) {
5512                 r1_request->encryption_enable = true;
5513                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5514                                 &r1_request->data_encryption_key_index);
5515                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5516                                 &r1_request->encrypt_tweak_lower);
5517                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5518                                 &r1_request->encrypt_tweak_upper);
5519         }
5520
5521         rc = pqi_build_aio_r1_sg_list(ctrl_info, r1_request, scmd, io_request);
5522         if (rc) {
5523                 pqi_free_io_request(io_request);
5524                 return SCSI_MLQUEUE_HOST_BUSY;
5525         }
5526
5527         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5528
5529         return 0;
5530 }
5531
5532 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
5533         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5534         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5535         struct pqi_scsi_dev_raid_map_data *rmd)
5536 {
5537         int rc;
5538         struct pqi_io_request *io_request;
5539         struct pqi_aio_r56_path_request *r56_request;
5540
5541         io_request = pqi_alloc_io_request(ctrl_info);
5542         io_request->io_complete_callback = pqi_aio_io_complete;
5543         io_request->scmd = scmd;
5544         io_request->raid_bypass = true;
5545
5546         r56_request = io_request->iu;
5547         memset(r56_request, 0, offsetof(struct pqi_aio_r56_path_request, sg_descriptors));
5548
5549         if (device->raid_level == SA_RAID_5 || device->raid_level == SA_RAID_51)
5550                 r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID5_IO;
5551         else
5552                 r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID6_IO;
5553
5554         put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r56_request->volume_id);
5555         put_unaligned_le32(rmd->aio_handle, &r56_request->data_it_nexus);
5556         put_unaligned_le32(rmd->p_parity_it_nexus, &r56_request->p_parity_it_nexus);
5557         if (rmd->raid_level == SA_RAID_6) {
5558                 put_unaligned_le32(rmd->q_parity_it_nexus, &r56_request->q_parity_it_nexus);
5559                 r56_request->xor_multiplier = rmd->xor_mult;
5560         }
5561         put_unaligned_le32(scsi_bufflen(scmd), &r56_request->data_length);
5562         r56_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5563         put_unaligned_le64(rmd->row, &r56_request->row);
5564
5565         put_unaligned_le16(io_request->index, &r56_request->request_id);
5566         r56_request->error_index = r56_request->request_id;
5567
5568         if (rmd->cdb_length > sizeof(r56_request->cdb))
5569                 rmd->cdb_length = sizeof(r56_request->cdb);
5570         r56_request->cdb_length = rmd->cdb_length;
5571         memcpy(r56_request->cdb, rmd->cdb, rmd->cdb_length);
5572
5573         /* The direction is always write. */
5574         r56_request->data_direction = SOP_READ_FLAG;
5575
5576         if (encryption_info) {
5577                 r56_request->encryption_enable = true;
5578                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5579                                 &r56_request->data_encryption_key_index);
5580                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5581                                 &r56_request->encrypt_tweak_lower);
5582                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5583                                 &r56_request->encrypt_tweak_upper);
5584         }
5585
5586         rc = pqi_build_aio_r56_sg_list(ctrl_info, r56_request, scmd, io_request);
5587         if (rc) {
5588                 pqi_free_io_request(io_request);
5589                 return SCSI_MLQUEUE_HOST_BUSY;
5590         }
5591
5592         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5593
5594         return 0;
5595 }
5596
5597 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
5598         struct scsi_cmnd *scmd)
5599 {
5600         u16 hw_queue;
5601
5602         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scsi_cmd_to_rq(scmd)));
5603         if (hw_queue > ctrl_info->max_hw_queue_index)
5604                 hw_queue = 0;
5605
5606         return hw_queue;
5607 }
5608
5609 static inline bool pqi_is_bypass_eligible_request(struct scsi_cmnd *scmd)
5610 {
5611         if (blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))
5612                 return false;
5613
5614         return scmd->SCp.this_residual == 0;
5615 }
5616
5617 /*
5618  * This function gets called just before we hand the completed SCSI request
5619  * back to the SML.
5620  */
5621
5622 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
5623 {
5624         struct pqi_scsi_dev *device;
5625
5626         if (!scmd->device) {
5627                 set_host_byte(scmd, DID_NO_CONNECT);
5628                 return;
5629         }
5630
5631         device = scmd->device->hostdata;
5632         if (!device) {
5633                 set_host_byte(scmd, DID_NO_CONNECT);
5634                 return;
5635         }
5636
5637         atomic_dec(&device->scsi_cmds_outstanding);
5638 }
5639
5640 static bool pqi_is_parity_write_stream(struct pqi_ctrl_info *ctrl_info,
5641         struct scsi_cmnd *scmd)
5642 {
5643         u32 oldest_jiffies;
5644         u8 lru_index;
5645         int i;
5646         int rc;
5647         struct pqi_scsi_dev *device;
5648         struct pqi_stream_data *pqi_stream_data;
5649         struct pqi_scsi_dev_raid_map_data rmd;
5650
5651         if (!ctrl_info->enable_stream_detection)
5652                 return false;
5653
5654         rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
5655         if (rc)
5656                 return false;
5657
5658         /* Check writes only. */
5659         if (!rmd.is_write)
5660                 return false;
5661
5662         device = scmd->device->hostdata;
5663
5664         /* Check for RAID 5/6 streams. */
5665         if (device->raid_level != SA_RAID_5 && device->raid_level != SA_RAID_6)
5666                 return false;
5667
5668         /*
5669          * If controller does not support AIO RAID{5,6} writes, need to send
5670          * requests down non-AIO path.
5671          */
5672         if ((device->raid_level == SA_RAID_5 && !ctrl_info->enable_r5_writes) ||
5673                 (device->raid_level == SA_RAID_6 && !ctrl_info->enable_r6_writes))
5674                 return true;
5675
5676         lru_index = 0;
5677         oldest_jiffies = INT_MAX;
5678         for (i = 0; i < NUM_STREAMS_PER_LUN; i++) {
5679                 pqi_stream_data = &device->stream_data[i];
5680                 /*
5681                  * Check for adjacent request or request is within
5682                  * the previous request.
5683                  */
5684                 if ((pqi_stream_data->next_lba &&
5685                         rmd.first_block >= pqi_stream_data->next_lba) &&
5686                         rmd.first_block <= pqi_stream_data->next_lba +
5687                                 rmd.block_cnt) {
5688                         pqi_stream_data->next_lba = rmd.first_block +
5689                                 rmd.block_cnt;
5690                         pqi_stream_data->last_accessed = jiffies;
5691                         return true;
5692                 }
5693
5694                 /* unused entry */
5695                 if (pqi_stream_data->last_accessed == 0) {
5696                         lru_index = i;
5697                         break;
5698                 }
5699
5700                 /* Find entry with oldest last accessed time. */
5701                 if (pqi_stream_data->last_accessed <= oldest_jiffies) {
5702                         oldest_jiffies = pqi_stream_data->last_accessed;
5703                         lru_index = i;
5704                 }
5705         }
5706
5707         /* Set LRU entry. */
5708         pqi_stream_data = &device->stream_data[lru_index];
5709         pqi_stream_data->last_accessed = jiffies;
5710         pqi_stream_data->next_lba = rmd.first_block + rmd.block_cnt;
5711
5712         return false;
5713 }
5714
5715 static int pqi_scsi_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
5716 {
5717         int rc;
5718         struct pqi_ctrl_info *ctrl_info;
5719         struct pqi_scsi_dev *device;
5720         u16 hw_queue;
5721         struct pqi_queue_group *queue_group;
5722         bool raid_bypassed;
5723
5724         device = scmd->device->hostdata;
5725
5726         if (!device) {
5727                 set_host_byte(scmd, DID_NO_CONNECT);
5728                 pqi_scsi_done(scmd);
5729                 return 0;
5730         }
5731
5732         atomic_inc(&device->scsi_cmds_outstanding);
5733
5734         ctrl_info = shost_to_hba(shost);
5735
5736         if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(device)) {
5737                 set_host_byte(scmd, DID_NO_CONNECT);
5738                 pqi_scsi_done(scmd);
5739                 return 0;
5740         }
5741
5742         if (pqi_ctrl_blocked(ctrl_info)) {
5743                 rc = SCSI_MLQUEUE_HOST_BUSY;
5744                 goto out;
5745         }
5746
5747         /*
5748          * This is necessary because the SML doesn't zero out this field during
5749          * error recovery.
5750          */
5751         scmd->result = 0;
5752
5753         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
5754         queue_group = &ctrl_info->queue_groups[hw_queue];
5755
5756         if (pqi_is_logical_device(device)) {
5757                 raid_bypassed = false;
5758                 if (device->raid_bypass_enabled &&
5759                         pqi_is_bypass_eligible_request(scmd) &&
5760                         !pqi_is_parity_write_stream(ctrl_info, scmd)) {
5761                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5762                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) {
5763                                 raid_bypassed = true;
5764                                 atomic_inc(&device->raid_bypass_cnt);
5765                         }
5766                 }
5767                 if (!raid_bypassed)
5768                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5769         } else {
5770                 if (device->aio_enabled)
5771                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5772                 else
5773                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5774         }
5775
5776 out:
5777         if (rc)
5778                 atomic_dec(&device->scsi_cmds_outstanding);
5779
5780         return rc;
5781 }
5782
5783 static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
5784         struct pqi_queue_group *queue_group)
5785 {
5786         unsigned int path;
5787         unsigned long flags;
5788         bool list_is_empty;
5789
5790         for (path = 0; path < 2; path++) {
5791                 while (1) {
5792                         spin_lock_irqsave(
5793                                 &queue_group->submit_lock[path], flags);
5794                         list_is_empty =
5795                                 list_empty(&queue_group->request_list[path]);
5796                         spin_unlock_irqrestore(
5797                                 &queue_group->submit_lock[path], flags);
5798                         if (list_is_empty)
5799                                 break;
5800                         pqi_check_ctrl_health(ctrl_info);
5801                         if (pqi_ctrl_offline(ctrl_info))
5802                                 return -ENXIO;
5803                         usleep_range(1000, 2000);
5804                 }
5805         }
5806
5807         return 0;
5808 }
5809
5810 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5811 {
5812         int rc;
5813         unsigned int i;
5814         unsigned int path;
5815         struct pqi_queue_group *queue_group;
5816         pqi_index_t iq_pi;
5817         pqi_index_t iq_ci;
5818
5819         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5820                 queue_group = &ctrl_info->queue_groups[i];
5821
5822                 rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5823                 if (rc)
5824                         return rc;
5825
5826                 for (path = 0; path < 2; path++) {
5827                         iq_pi = queue_group->iq_pi_copy[path];
5828
5829                         while (1) {
5830                                 iq_ci = readl(queue_group->iq_ci[path]);
5831                                 if (iq_ci == iq_pi)
5832                                         break;
5833                                 pqi_check_ctrl_health(ctrl_info);
5834                                 if (pqi_ctrl_offline(ctrl_info))
5835                                         return -ENXIO;
5836                                 usleep_range(1000, 2000);
5837                         }
5838                 }
5839         }
5840
5841         return 0;
5842 }
5843
5844 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5845         struct pqi_scsi_dev *device)
5846 {
5847         unsigned int i;
5848         unsigned int path;
5849         struct pqi_queue_group *queue_group;
5850         unsigned long flags;
5851         struct pqi_io_request *io_request;
5852         struct pqi_io_request *next;
5853         struct scsi_cmnd *scmd;
5854         struct pqi_scsi_dev *scsi_device;
5855
5856         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5857                 queue_group = &ctrl_info->queue_groups[i];
5858
5859                 for (path = 0; path < 2; path++) {
5860                         spin_lock_irqsave(
5861                                 &queue_group->submit_lock[path], flags);
5862
5863                         list_for_each_entry_safe(io_request, next,
5864                                 &queue_group->request_list[path],
5865                                 request_list_entry) {
5866
5867                                 scmd = io_request->scmd;
5868                                 if (!scmd)
5869                                         continue;
5870
5871                                 scsi_device = scmd->device->hostdata;
5872                                 if (scsi_device != device)
5873                                         continue;
5874
5875                                 list_del(&io_request->request_list_entry);
5876                                 set_host_byte(scmd, DID_RESET);
5877                                 pqi_free_io_request(io_request);
5878                                 scsi_dma_unmap(scmd);
5879                                 pqi_scsi_done(scmd);
5880                         }
5881
5882                         spin_unlock_irqrestore(
5883                                 &queue_group->submit_lock[path], flags);
5884                 }
5885         }
5886 }
5887
5888 #define PQI_PENDING_IO_WARNING_TIMEOUT_SECS     10
5889
5890 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5891         struct pqi_scsi_dev *device, unsigned long timeout_msecs)
5892 {
5893         int cmds_outstanding;
5894         unsigned long start_jiffies;
5895         unsigned long warning_timeout;
5896         unsigned long msecs_waiting;
5897
5898         start_jiffies = jiffies;
5899         warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * PQI_HZ) + start_jiffies;
5900
5901         while ((cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding)) > 0) {
5902                 pqi_check_ctrl_health(ctrl_info);
5903                 if (pqi_ctrl_offline(ctrl_info))
5904                         return -ENXIO;
5905                 msecs_waiting = jiffies_to_msecs(jiffies - start_jiffies);
5906                 if (msecs_waiting > timeout_msecs) {
5907                         dev_err(&ctrl_info->pci_dev->dev,
5908                                 "scsi %d:%d:%d:%d: timed out after %lu seconds waiting for %d outstanding command(s)\n",
5909                                 ctrl_info->scsi_host->host_no, device->bus, device->target,
5910                                 device->lun, msecs_waiting / 1000, cmds_outstanding);
5911                         return -ETIMEDOUT;
5912                 }
5913                 if (time_after(jiffies, warning_timeout)) {
5914                         dev_warn(&ctrl_info->pci_dev->dev,
5915                                 "scsi %d:%d:%d:%d: waiting %lu seconds for %d outstanding command(s)\n",
5916                                 ctrl_info->scsi_host->host_no, device->bus, device->target,
5917                                 device->lun, msecs_waiting / 1000, cmds_outstanding);
5918                         warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * PQI_HZ) + jiffies;
5919                 }
5920                 usleep_range(1000, 2000);
5921         }
5922
5923         return 0;
5924 }
5925
5926 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5927         void *context)
5928 {
5929         struct completion *waiting = context;
5930
5931         complete(waiting);
5932 }
5933
5934 #define PQI_LUN_RESET_POLL_COMPLETION_SECS      10
5935
5936 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5937         struct pqi_scsi_dev *device, struct completion *wait)
5938 {
5939         int rc;
5940         unsigned int wait_secs;
5941
5942         wait_secs = 0;
5943
5944         while (1) {
5945                 if (wait_for_completion_io_timeout(wait,
5946                         PQI_LUN_RESET_POLL_COMPLETION_SECS * PQI_HZ)) {
5947                         rc = 0;
5948                         break;
5949                 }
5950
5951                 pqi_check_ctrl_health(ctrl_info);
5952                 if (pqi_ctrl_offline(ctrl_info)) {
5953                         rc = -ENXIO;
5954                         break;
5955                 }
5956
5957                 wait_secs += PQI_LUN_RESET_POLL_COMPLETION_SECS;
5958
5959                 dev_warn(&ctrl_info->pci_dev->dev,
5960                         "scsi %d:%d:%d:%d: waiting %u seconds for LUN reset to complete\n",
5961                         ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun,
5962                         wait_secs);
5963         }
5964
5965         return rc;
5966 }
5967
5968 #define PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS     30
5969
5970 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
5971 {
5972         int rc;
5973         struct pqi_io_request *io_request;
5974         DECLARE_COMPLETION_ONSTACK(wait);
5975         struct pqi_task_management_request *request;
5976
5977         io_request = pqi_alloc_io_request(ctrl_info);
5978         io_request->io_complete_callback = pqi_lun_reset_complete;
5979         io_request->context = &wait;
5980
5981         request = io_request->iu;
5982         memset(request, 0, sizeof(*request));
5983
5984         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5985         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5986                 &request->header.iu_length);
5987         put_unaligned_le16(io_request->index, &request->request_id);
5988         memcpy(request->lun_number, device->scsi3addr,
5989                 sizeof(request->lun_number));
5990         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5991         if (ctrl_info->tmf_iu_timeout_supported)
5992                 put_unaligned_le16(PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS, &request->timeout);
5993
5994         pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5995                 io_request);
5996
5997         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5998         if (rc == 0)
5999                 rc = io_request->status;
6000
6001         pqi_free_io_request(io_request);
6002
6003         return rc;
6004 }
6005
6006 #define PQI_LUN_RESET_RETRIES                           3
6007 #define PQI_LUN_RESET_RETRY_INTERVAL_MSECS              (10 * 1000)
6008 #define PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS          (10 * 60 * 1000)
6009 #define PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS   (2 * 60 * 1000)
6010
6011 static int pqi_lun_reset_with_retries(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
6012 {
6013         int reset_rc;
6014         int wait_rc;
6015         unsigned int retries;
6016         unsigned long timeout_msecs;
6017
6018         for (retries = 0;;) {
6019                 reset_rc = pqi_lun_reset(ctrl_info, device);
6020                 if (reset_rc == 0 || ++retries > PQI_LUN_RESET_RETRIES)
6021                         break;
6022                 msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
6023         }
6024
6025         timeout_msecs = reset_rc ? PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS :
6026                 PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS;
6027
6028         wait_rc = pqi_device_wait_for_pending_io(ctrl_info, device, timeout_msecs);
6029         if (wait_rc && reset_rc == 0)
6030                 reset_rc = wait_rc;
6031
6032         return reset_rc == 0 ? SUCCESS : FAILED;
6033 }
6034
6035 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
6036         struct pqi_scsi_dev *device)
6037 {
6038         int rc;
6039
6040         pqi_ctrl_block_requests(ctrl_info);
6041         pqi_ctrl_wait_until_quiesced(ctrl_info);
6042         pqi_fail_io_queued_for_device(ctrl_info, device);
6043         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
6044         if (rc)
6045                 rc = FAILED;
6046         else
6047                 rc = pqi_lun_reset_with_retries(ctrl_info, device);
6048         pqi_ctrl_unblock_requests(ctrl_info);
6049
6050         return rc;
6051 }
6052
6053 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
6054 {
6055         int rc;
6056         struct Scsi_Host *shost;
6057         struct pqi_ctrl_info *ctrl_info;
6058         struct pqi_scsi_dev *device;
6059
6060         shost = scmd->device->host;
6061         ctrl_info = shost_to_hba(shost);
6062         device = scmd->device->hostdata;
6063
6064         mutex_lock(&ctrl_info->lun_reset_mutex);
6065
6066         dev_err(&ctrl_info->pci_dev->dev,
6067                 "resetting scsi %d:%d:%d:%d due to cmd 0x%02x\n",
6068                 shost->host_no,
6069                 device->bus, device->target, device->lun,
6070                 scmd->cmd_len > 0 ? scmd->cmnd[0] : 0xff);
6071
6072         pqi_check_ctrl_health(ctrl_info);
6073         if (pqi_ctrl_offline(ctrl_info))
6074                 rc = FAILED;
6075         else
6076                 rc = pqi_device_reset(ctrl_info, device);
6077
6078         dev_err(&ctrl_info->pci_dev->dev,
6079                 "reset of scsi %d:%d:%d:%d: %s\n",
6080                 shost->host_no, device->bus, device->target, device->lun,
6081                 rc == SUCCESS ? "SUCCESS" : "FAILED");
6082
6083         mutex_unlock(&ctrl_info->lun_reset_mutex);
6084
6085         return rc;
6086 }
6087
6088 static int pqi_slave_alloc(struct scsi_device *sdev)
6089 {
6090         struct pqi_scsi_dev *device;
6091         unsigned long flags;
6092         struct pqi_ctrl_info *ctrl_info;
6093         struct scsi_target *starget;
6094         struct sas_rphy *rphy;
6095
6096         ctrl_info = shost_to_hba(sdev->host);
6097
6098         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6099
6100         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
6101                 starget = scsi_target(sdev);
6102                 rphy = target_to_rphy(starget);
6103                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
6104                 if (device) {
6105                         device->target = sdev_id(sdev);
6106                         device->lun = sdev->lun;
6107                         device->target_lun_valid = true;
6108                 }
6109         } else {
6110                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
6111                         sdev_id(sdev), sdev->lun);
6112         }
6113
6114         if (device) {
6115                 sdev->hostdata = device;
6116                 device->sdev = sdev;
6117                 if (device->queue_depth) {
6118                         device->advertised_queue_depth = device->queue_depth;
6119                         scsi_change_queue_depth(sdev,
6120                                 device->advertised_queue_depth);
6121                 }
6122                 if (pqi_is_logical_device(device)) {
6123                         pqi_disable_write_same(sdev);
6124                 } else {
6125                         sdev->allow_restart = 1;
6126                         if (device->device_type == SA_DEVICE_TYPE_NVME)
6127                                 pqi_disable_write_same(sdev);
6128                 }
6129         }
6130
6131         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6132
6133         return 0;
6134 }
6135
6136 static int pqi_map_queues(struct Scsi_Host *shost)
6137 {
6138         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6139
6140         return blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
6141                                         ctrl_info->pci_dev, 0);
6142 }
6143
6144 static int pqi_slave_configure(struct scsi_device *sdev)
6145 {
6146         struct pqi_scsi_dev *device;
6147
6148         device = sdev->hostdata;
6149         device->devtype = sdev->type;
6150
6151         return 0;
6152 }
6153
6154 static void pqi_slave_destroy(struct scsi_device *sdev)
6155 {
6156         unsigned long flags;
6157         struct pqi_scsi_dev *device;
6158         struct pqi_ctrl_info *ctrl_info;
6159
6160         ctrl_info = shost_to_hba(sdev->host);
6161
6162         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6163
6164         device = sdev->hostdata;
6165         if (device) {
6166                 sdev->hostdata = NULL;
6167                 if (!list_empty(&device->scsi_device_list_entry))
6168                         list_del(&device->scsi_device_list_entry);
6169         }
6170
6171         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6172
6173         if (device) {
6174                 pqi_dev_info(ctrl_info, "removed", device);
6175                 pqi_free_device(device);
6176         }
6177 }
6178
6179 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6180 {
6181         struct pci_dev *pci_dev;
6182         u32 subsystem_vendor;
6183         u32 subsystem_device;
6184         cciss_pci_info_struct pciinfo;
6185
6186         if (!arg)
6187                 return -EINVAL;
6188
6189         pci_dev = ctrl_info->pci_dev;
6190
6191         pciinfo.domain = pci_domain_nr(pci_dev->bus);
6192         pciinfo.bus = pci_dev->bus->number;
6193         pciinfo.dev_fn = pci_dev->devfn;
6194         subsystem_vendor = pci_dev->subsystem_vendor;
6195         subsystem_device = pci_dev->subsystem_device;
6196         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) | subsystem_vendor;
6197
6198         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
6199                 return -EFAULT;
6200
6201         return 0;
6202 }
6203
6204 static int pqi_getdrivver_ioctl(void __user *arg)
6205 {
6206         u32 version;
6207
6208         if (!arg)
6209                 return -EINVAL;
6210
6211         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
6212                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
6213
6214         if (copy_to_user(arg, &version, sizeof(version)))
6215                 return -EFAULT;
6216
6217         return 0;
6218 }
6219
6220 struct ciss_error_info {
6221         u8      scsi_status;
6222         int     command_status;
6223         size_t  sense_data_length;
6224 };
6225
6226 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
6227         struct ciss_error_info *ciss_error_info)
6228 {
6229         int ciss_cmd_status;
6230         size_t sense_data_length;
6231
6232         switch (pqi_error_info->data_out_result) {
6233         case PQI_DATA_IN_OUT_GOOD:
6234                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
6235                 break;
6236         case PQI_DATA_IN_OUT_UNDERFLOW:
6237                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
6238                 break;
6239         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
6240                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
6241                 break;
6242         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
6243         case PQI_DATA_IN_OUT_BUFFER_ERROR:
6244         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
6245         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
6246         case PQI_DATA_IN_OUT_ERROR:
6247                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
6248                 break;
6249         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
6250         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
6251         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
6252         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
6253         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
6254         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
6255         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
6256         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
6257         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
6258         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
6259                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
6260                 break;
6261         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
6262                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
6263                 break;
6264         case PQI_DATA_IN_OUT_ABORTED:
6265                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
6266                 break;
6267         case PQI_DATA_IN_OUT_TIMEOUT:
6268                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
6269                 break;
6270         default:
6271                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
6272                 break;
6273         }
6274
6275         sense_data_length =
6276                 get_unaligned_le16(&pqi_error_info->sense_data_length);
6277         if (sense_data_length == 0)
6278                 sense_data_length =
6279                 get_unaligned_le16(&pqi_error_info->response_data_length);
6280         if (sense_data_length)
6281                 if (sense_data_length > sizeof(pqi_error_info->data))
6282                         sense_data_length = sizeof(pqi_error_info->data);
6283
6284         ciss_error_info->scsi_status = pqi_error_info->status;
6285         ciss_error_info->command_status = ciss_cmd_status;
6286         ciss_error_info->sense_data_length = sense_data_length;
6287 }
6288
6289 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6290 {
6291         int rc;
6292         char *kernel_buffer = NULL;
6293         u16 iu_length;
6294         size_t sense_data_length;
6295         IOCTL_Command_struct iocommand;
6296         struct pqi_raid_path_request request;
6297         struct pqi_raid_error_info pqi_error_info;
6298         struct ciss_error_info ciss_error_info;
6299
6300         if (pqi_ctrl_offline(ctrl_info))
6301                 return -ENXIO;
6302         if (pqi_ofa_in_progress(ctrl_info) && pqi_ctrl_blocked(ctrl_info))
6303                 return -EBUSY;
6304         if (!arg)
6305                 return -EINVAL;
6306         if (!capable(CAP_SYS_RAWIO))
6307                 return -EPERM;
6308         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
6309                 return -EFAULT;
6310         if (iocommand.buf_size < 1 &&
6311                 iocommand.Request.Type.Direction != XFER_NONE)
6312                 return -EINVAL;
6313         if (iocommand.Request.CDBLen > sizeof(request.cdb))
6314                 return -EINVAL;
6315         if (iocommand.Request.Type.Type != TYPE_CMD)
6316                 return -EINVAL;
6317
6318         switch (iocommand.Request.Type.Direction) {
6319         case XFER_NONE:
6320         case XFER_WRITE:
6321         case XFER_READ:
6322         case XFER_READ | XFER_WRITE:
6323                 break;
6324         default:
6325                 return -EINVAL;
6326         }
6327
6328         if (iocommand.buf_size > 0) {
6329                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
6330                 if (!kernel_buffer)
6331                         return -ENOMEM;
6332                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
6333                         if (copy_from_user(kernel_buffer, iocommand.buf,
6334                                 iocommand.buf_size)) {
6335                                 rc = -EFAULT;
6336                                 goto out;
6337                         }
6338                 } else {
6339                         memset(kernel_buffer, 0, iocommand.buf_size);
6340                 }
6341         }
6342
6343         memset(&request, 0, sizeof(request));
6344
6345         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
6346         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
6347                 PQI_REQUEST_HEADER_LENGTH;
6348         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
6349                 sizeof(request.lun_number));
6350         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
6351         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
6352
6353         switch (iocommand.Request.Type.Direction) {
6354         case XFER_NONE:
6355                 request.data_direction = SOP_NO_DIRECTION_FLAG;
6356                 break;
6357         case XFER_WRITE:
6358                 request.data_direction = SOP_WRITE_FLAG;
6359                 break;
6360         case XFER_READ:
6361                 request.data_direction = SOP_READ_FLAG;
6362                 break;
6363         case XFER_READ | XFER_WRITE:
6364                 request.data_direction = SOP_BIDIRECTIONAL;
6365                 break;
6366         }
6367
6368         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
6369
6370         if (iocommand.buf_size > 0) {
6371                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
6372
6373                 rc = pqi_map_single(ctrl_info->pci_dev,
6374                         &request.sg_descriptors[0], kernel_buffer,
6375                         iocommand.buf_size, DMA_BIDIRECTIONAL);
6376                 if (rc)
6377                         goto out;
6378
6379                 iu_length += sizeof(request.sg_descriptors[0]);
6380         }
6381
6382         put_unaligned_le16(iu_length, &request.header.iu_length);
6383
6384         if (ctrl_info->raid_iu_timeout_supported)
6385                 put_unaligned_le32(iocommand.Request.Timeout, &request.timeout);
6386
6387         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6388                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info);
6389
6390         if (iocommand.buf_size > 0)
6391                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
6392                         DMA_BIDIRECTIONAL);
6393
6394         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
6395
6396         if (rc == 0) {
6397                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
6398                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
6399                 iocommand.error_info.CommandStatus =
6400                         ciss_error_info.command_status;
6401                 sense_data_length = ciss_error_info.sense_data_length;
6402                 if (sense_data_length) {
6403                         if (sense_data_length >
6404                                 sizeof(iocommand.error_info.SenseInfo))
6405                                 sense_data_length =
6406                                         sizeof(iocommand.error_info.SenseInfo);
6407                         memcpy(iocommand.error_info.SenseInfo,
6408                                 pqi_error_info.data, sense_data_length);
6409                         iocommand.error_info.SenseLen = sense_data_length;
6410                 }
6411         }
6412
6413         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
6414                 rc = -EFAULT;
6415                 goto out;
6416         }
6417
6418         if (rc == 0 && iocommand.buf_size > 0 &&
6419                 (iocommand.Request.Type.Direction & XFER_READ)) {
6420                 if (copy_to_user(iocommand.buf, kernel_buffer,
6421                         iocommand.buf_size)) {
6422                         rc = -EFAULT;
6423                 }
6424         }
6425
6426 out:
6427         kfree(kernel_buffer);
6428
6429         return rc;
6430 }
6431
6432 static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd,
6433                      void __user *arg)
6434 {
6435         int rc;
6436         struct pqi_ctrl_info *ctrl_info;
6437
6438         ctrl_info = shost_to_hba(sdev->host);
6439
6440         switch (cmd) {
6441         case CCISS_DEREGDISK:
6442         case CCISS_REGNEWDISK:
6443         case CCISS_REGNEWD:
6444                 rc = pqi_scan_scsi_devices(ctrl_info);
6445                 break;
6446         case CCISS_GETPCIINFO:
6447                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
6448                 break;
6449         case CCISS_GETDRIVVER:
6450                 rc = pqi_getdrivver_ioctl(arg);
6451                 break;
6452         case CCISS_PASSTHRU:
6453                 rc = pqi_passthru_ioctl(ctrl_info, arg);
6454                 break;
6455         default:
6456                 rc = -EINVAL;
6457                 break;
6458         }
6459
6460         return rc;
6461 }
6462
6463 static ssize_t pqi_firmware_version_show(struct device *dev,
6464         struct device_attribute *attr, char *buffer)
6465 {
6466         struct Scsi_Host *shost;
6467         struct pqi_ctrl_info *ctrl_info;
6468
6469         shost = class_to_shost(dev);
6470         ctrl_info = shost_to_hba(shost);
6471
6472         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->firmware_version);
6473 }
6474
6475 static ssize_t pqi_driver_version_show(struct device *dev,
6476         struct device_attribute *attr, char *buffer)
6477 {
6478         return scnprintf(buffer, PAGE_SIZE, "%s\n", DRIVER_VERSION BUILD_TIMESTAMP);
6479 }
6480
6481 static ssize_t pqi_serial_number_show(struct device *dev,
6482         struct device_attribute *attr, char *buffer)
6483 {
6484         struct Scsi_Host *shost;
6485         struct pqi_ctrl_info *ctrl_info;
6486
6487         shost = class_to_shost(dev);
6488         ctrl_info = shost_to_hba(shost);
6489
6490         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->serial_number);
6491 }
6492
6493 static ssize_t pqi_model_show(struct device *dev,
6494         struct device_attribute *attr, char *buffer)
6495 {
6496         struct Scsi_Host *shost;
6497         struct pqi_ctrl_info *ctrl_info;
6498
6499         shost = class_to_shost(dev);
6500         ctrl_info = shost_to_hba(shost);
6501
6502         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->model);
6503 }
6504
6505 static ssize_t pqi_vendor_show(struct device *dev,
6506         struct device_attribute *attr, char *buffer)
6507 {
6508         struct Scsi_Host *shost;
6509         struct pqi_ctrl_info *ctrl_info;
6510
6511         shost = class_to_shost(dev);
6512         ctrl_info = shost_to_hba(shost);
6513
6514         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->vendor);
6515 }
6516
6517 static ssize_t pqi_host_rescan_store(struct device *dev,
6518         struct device_attribute *attr, const char *buffer, size_t count)
6519 {
6520         struct Scsi_Host *shost = class_to_shost(dev);
6521
6522         pqi_scan_start(shost);
6523
6524         return count;
6525 }
6526
6527 static ssize_t pqi_lockup_action_show(struct device *dev,
6528         struct device_attribute *attr, char *buffer)
6529 {
6530         int count = 0;
6531         unsigned int i;
6532
6533         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6534                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
6535                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6536                                 "[%s] ", pqi_lockup_actions[i].name);
6537                 else
6538                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6539                                 "%s ", pqi_lockup_actions[i].name);
6540         }
6541
6542         count += scnprintf(buffer + count, PAGE_SIZE - count, "\n");
6543
6544         return count;
6545 }
6546
6547 static ssize_t pqi_lockup_action_store(struct device *dev,
6548         struct device_attribute *attr, const char *buffer, size_t count)
6549 {
6550         unsigned int i;
6551         char *action_name;
6552         char action_name_buffer[32];
6553
6554         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
6555         action_name = strstrip(action_name_buffer);
6556
6557         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6558                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
6559                         pqi_lockup_action = pqi_lockup_actions[i].action;
6560                         return count;
6561                 }
6562         }
6563
6564         return -EINVAL;
6565 }
6566
6567 static ssize_t pqi_host_enable_stream_detection_show(struct device *dev,
6568         struct device_attribute *attr, char *buffer)
6569 {
6570         struct Scsi_Host *shost = class_to_shost(dev);
6571         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6572
6573         return scnprintf(buffer, 10, "%x\n",
6574                         ctrl_info->enable_stream_detection);
6575 }
6576
6577 static ssize_t pqi_host_enable_stream_detection_store(struct device *dev,
6578         struct device_attribute *attr, const char *buffer, size_t count)
6579 {
6580         struct Scsi_Host *shost = class_to_shost(dev);
6581         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6582         u8 set_stream_detection = 0;
6583
6584         if (kstrtou8(buffer, 0, &set_stream_detection))
6585                 return -EINVAL;
6586
6587         if (set_stream_detection > 0)
6588                 set_stream_detection = 1;
6589
6590         ctrl_info->enable_stream_detection = set_stream_detection;
6591
6592         return count;
6593 }
6594
6595 static ssize_t pqi_host_enable_r5_writes_show(struct device *dev,
6596         struct device_attribute *attr, char *buffer)
6597 {
6598         struct Scsi_Host *shost = class_to_shost(dev);
6599         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6600
6601         return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r5_writes);
6602 }
6603
6604 static ssize_t pqi_host_enable_r5_writes_store(struct device *dev,
6605         struct device_attribute *attr, const char *buffer, size_t count)
6606 {
6607         struct Scsi_Host *shost = class_to_shost(dev);
6608         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6609         u8 set_r5_writes = 0;
6610
6611         if (kstrtou8(buffer, 0, &set_r5_writes))
6612                 return -EINVAL;
6613
6614         if (set_r5_writes > 0)
6615                 set_r5_writes = 1;
6616
6617         ctrl_info->enable_r5_writes = set_r5_writes;
6618
6619         return count;
6620 }
6621
6622 static ssize_t pqi_host_enable_r6_writes_show(struct device *dev,
6623         struct device_attribute *attr, char *buffer)
6624 {
6625         struct Scsi_Host *shost = class_to_shost(dev);
6626         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6627
6628         return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r6_writes);
6629 }
6630
6631 static ssize_t pqi_host_enable_r6_writes_store(struct device *dev,
6632         struct device_attribute *attr, const char *buffer, size_t count)
6633 {
6634         struct Scsi_Host *shost = class_to_shost(dev);
6635         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6636         u8 set_r6_writes = 0;
6637
6638         if (kstrtou8(buffer, 0, &set_r6_writes))
6639                 return -EINVAL;
6640
6641         if (set_r6_writes > 0)
6642                 set_r6_writes = 1;
6643
6644         ctrl_info->enable_r6_writes = set_r6_writes;
6645
6646         return count;
6647 }
6648
6649 static DEVICE_ATTR(driver_version, 0444, pqi_driver_version_show, NULL);
6650 static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL);
6651 static DEVICE_ATTR(model, 0444, pqi_model_show, NULL);
6652 static DEVICE_ATTR(serial_number, 0444, pqi_serial_number_show, NULL);
6653 static DEVICE_ATTR(vendor, 0444, pqi_vendor_show, NULL);
6654 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
6655 static DEVICE_ATTR(lockup_action, 0644, pqi_lockup_action_show,
6656         pqi_lockup_action_store);
6657 static DEVICE_ATTR(enable_stream_detection, 0644,
6658         pqi_host_enable_stream_detection_show,
6659         pqi_host_enable_stream_detection_store);
6660 static DEVICE_ATTR(enable_r5_writes, 0644,
6661         pqi_host_enable_r5_writes_show, pqi_host_enable_r5_writes_store);
6662 static DEVICE_ATTR(enable_r6_writes, 0644,
6663         pqi_host_enable_r6_writes_show, pqi_host_enable_r6_writes_store);
6664
6665 static struct device_attribute *pqi_shost_attrs[] = {
6666         &dev_attr_driver_version,
6667         &dev_attr_firmware_version,
6668         &dev_attr_model,
6669         &dev_attr_serial_number,
6670         &dev_attr_vendor,
6671         &dev_attr_rescan,
6672         &dev_attr_lockup_action,
6673         &dev_attr_enable_stream_detection,
6674         &dev_attr_enable_r5_writes,
6675         &dev_attr_enable_r6_writes,
6676         NULL
6677 };
6678
6679 static ssize_t pqi_unique_id_show(struct device *dev,
6680         struct device_attribute *attr, char *buffer)
6681 {
6682         struct pqi_ctrl_info *ctrl_info;
6683         struct scsi_device *sdev;
6684         struct pqi_scsi_dev *device;
6685         unsigned long flags;
6686         u8 unique_id[16];
6687
6688         sdev = to_scsi_device(dev);
6689         ctrl_info = shost_to_hba(sdev->host);
6690
6691         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6692
6693         device = sdev->hostdata;
6694         if (!device) {
6695                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6696                 return -ENODEV;
6697         }
6698
6699         if (device->is_physical_device) {
6700                 memset(unique_id, 0, 8);
6701                 memcpy(unique_id + 8, &device->wwid, sizeof(device->wwid));
6702         } else {
6703                 memcpy(unique_id, device->volume_id, sizeof(device->volume_id));
6704         }
6705
6706         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6707
6708         return scnprintf(buffer, PAGE_SIZE,
6709                 "%02X%02X%02X%02X%02X%02X%02X%02X"
6710                 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
6711                 unique_id[0], unique_id[1], unique_id[2], unique_id[3],
6712                 unique_id[4], unique_id[5], unique_id[6], unique_id[7],
6713                 unique_id[8], unique_id[9], unique_id[10], unique_id[11],
6714                 unique_id[12], unique_id[13], unique_id[14], unique_id[15]);
6715 }
6716
6717 static ssize_t pqi_lunid_show(struct device *dev,
6718         struct device_attribute *attr, char *buffer)
6719 {
6720         struct pqi_ctrl_info *ctrl_info;
6721         struct scsi_device *sdev;
6722         struct pqi_scsi_dev *device;
6723         unsigned long flags;
6724         u8 lunid[8];
6725
6726         sdev = to_scsi_device(dev);
6727         ctrl_info = shost_to_hba(sdev->host);
6728
6729         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6730
6731         device = sdev->hostdata;
6732         if (!device) {
6733                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6734                 return -ENODEV;
6735         }
6736
6737         memcpy(lunid, device->scsi3addr, sizeof(lunid));
6738
6739         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6740
6741         return scnprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid);
6742 }
6743
6744 #define MAX_PATHS       8
6745
6746 static ssize_t pqi_path_info_show(struct device *dev,
6747         struct device_attribute *attr, char *buf)
6748 {
6749         struct pqi_ctrl_info *ctrl_info;
6750         struct scsi_device *sdev;
6751         struct pqi_scsi_dev *device;
6752         unsigned long flags;
6753         int i;
6754         int output_len = 0;
6755         u8 box;
6756         u8 bay;
6757         u8 path_map_index;
6758         char *active;
6759         u8 phys_connector[2];
6760
6761         sdev = to_scsi_device(dev);
6762         ctrl_info = shost_to_hba(sdev->host);
6763
6764         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6765
6766         device = sdev->hostdata;
6767         if (!device) {
6768                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6769                 return -ENODEV;
6770         }
6771
6772         bay = device->bay;
6773         for (i = 0; i < MAX_PATHS; i++) {
6774                 path_map_index = 1 << i;
6775                 if (i == device->active_path_index)
6776                         active = "Active";
6777                 else if (device->path_map & path_map_index)
6778                         active = "Inactive";
6779                 else
6780                         continue;
6781
6782                 output_len += scnprintf(buf + output_len,
6783                                         PAGE_SIZE - output_len,
6784                                         "[%d:%d:%d:%d] %20.20s ",
6785                                         ctrl_info->scsi_host->host_no,
6786                                         device->bus, device->target,
6787                                         device->lun,
6788                                         scsi_device_type(device->devtype));
6789
6790                 if (device->devtype == TYPE_RAID ||
6791                         pqi_is_logical_device(device))
6792                         goto end_buffer;
6793
6794                 memcpy(&phys_connector, &device->phys_connector[i],
6795                         sizeof(phys_connector));
6796                 if (phys_connector[0] < '0')
6797                         phys_connector[0] = '0';
6798                 if (phys_connector[1] < '0')
6799                         phys_connector[1] = '0';
6800
6801                 output_len += scnprintf(buf + output_len,
6802                                         PAGE_SIZE - output_len,
6803                                         "PORT: %.2s ", phys_connector);
6804
6805                 box = device->box[i];
6806                 if (box != 0 && box != 0xFF)
6807                         output_len += scnprintf(buf + output_len,
6808                                                 PAGE_SIZE - output_len,
6809                                                 "BOX: %hhu ", box);
6810
6811                 if ((device->devtype == TYPE_DISK ||
6812                         device->devtype == TYPE_ZBC) &&
6813                         pqi_expose_device(device))
6814                         output_len += scnprintf(buf + output_len,
6815                                                 PAGE_SIZE - output_len,
6816                                                 "BAY: %hhu ", bay);
6817
6818 end_buffer:
6819                 output_len += scnprintf(buf + output_len,
6820                                         PAGE_SIZE - output_len,
6821                                         "%s\n", active);
6822         }
6823
6824         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6825
6826         return output_len;
6827 }
6828
6829 static ssize_t pqi_sas_address_show(struct device *dev,
6830         struct device_attribute *attr, char *buffer)
6831 {
6832         struct pqi_ctrl_info *ctrl_info;
6833         struct scsi_device *sdev;
6834         struct pqi_scsi_dev *device;
6835         unsigned long flags;
6836         u64 sas_address;
6837
6838         sdev = to_scsi_device(dev);
6839         ctrl_info = shost_to_hba(sdev->host);
6840
6841         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6842
6843         device = sdev->hostdata;
6844         if (!device || !pqi_is_device_with_sas_address(device)) {
6845                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6846                 return -ENODEV;
6847         }
6848
6849         sas_address = device->sas_address;
6850
6851         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6852
6853         return scnprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
6854 }
6855
6856 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
6857         struct device_attribute *attr, char *buffer)
6858 {
6859         struct pqi_ctrl_info *ctrl_info;
6860         struct scsi_device *sdev;
6861         struct pqi_scsi_dev *device;
6862         unsigned long flags;
6863
6864         sdev = to_scsi_device(dev);
6865         ctrl_info = shost_to_hba(sdev->host);
6866
6867         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6868
6869         device = sdev->hostdata;
6870         if (!device) {
6871                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6872                 return -ENODEV;
6873         }
6874
6875         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
6876         buffer[1] = '\n';
6877         buffer[2] = '\0';
6878
6879         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6880
6881         return 2;
6882 }
6883
6884 static ssize_t pqi_raid_level_show(struct device *dev,
6885         struct device_attribute *attr, char *buffer)
6886 {
6887         struct pqi_ctrl_info *ctrl_info;
6888         struct scsi_device *sdev;
6889         struct pqi_scsi_dev *device;
6890         unsigned long flags;
6891         char *raid_level;
6892
6893         sdev = to_scsi_device(dev);
6894         ctrl_info = shost_to_hba(sdev->host);
6895
6896         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6897
6898         device = sdev->hostdata;
6899         if (!device) {
6900                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6901                 return -ENODEV;
6902         }
6903
6904         if (pqi_is_logical_device(device))
6905                 raid_level = pqi_raid_level_to_string(device->raid_level);
6906         else
6907                 raid_level = "N/A";
6908
6909         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6910
6911         return scnprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
6912 }
6913
6914 static ssize_t pqi_raid_bypass_cnt_show(struct device *dev,
6915         struct device_attribute *attr, char *buffer)
6916 {
6917         struct pqi_ctrl_info *ctrl_info;
6918         struct scsi_device *sdev;
6919         struct pqi_scsi_dev *device;
6920         unsigned long flags;
6921         int raid_bypass_cnt;
6922
6923         sdev = to_scsi_device(dev);
6924         ctrl_info = shost_to_hba(sdev->host);
6925
6926         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6927
6928         device = sdev->hostdata;
6929         if (!device) {
6930                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6931                 return -ENODEV;
6932         }
6933
6934         raid_bypass_cnt = atomic_read(&device->raid_bypass_cnt);
6935
6936         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6937
6938         return scnprintf(buffer, PAGE_SIZE, "0x%x\n", raid_bypass_cnt);
6939 }
6940
6941 static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL);
6942 static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL);
6943 static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL);
6944 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
6945 static DEVICE_ATTR(ssd_smart_path_enabled, 0444, pqi_ssd_smart_path_enabled_show, NULL);
6946 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
6947 static DEVICE_ATTR(raid_bypass_cnt, 0444, pqi_raid_bypass_cnt_show, NULL);
6948
6949 static struct device_attribute *pqi_sdev_attrs[] = {
6950         &dev_attr_lunid,
6951         &dev_attr_unique_id,
6952         &dev_attr_path_info,
6953         &dev_attr_sas_address,
6954         &dev_attr_ssd_smart_path_enabled,
6955         &dev_attr_raid_level,
6956         &dev_attr_raid_bypass_cnt,
6957         NULL
6958 };
6959
6960 static struct scsi_host_template pqi_driver_template = {
6961         .module = THIS_MODULE,
6962         .name = DRIVER_NAME_SHORT,
6963         .proc_name = DRIVER_NAME_SHORT,
6964         .queuecommand = pqi_scsi_queue_command,
6965         .scan_start = pqi_scan_start,
6966         .scan_finished = pqi_scan_finished,
6967         .this_id = -1,
6968         .eh_device_reset_handler = pqi_eh_device_reset_handler,
6969         .ioctl = pqi_ioctl,
6970         .slave_alloc = pqi_slave_alloc,
6971         .slave_configure = pqi_slave_configure,
6972         .slave_destroy = pqi_slave_destroy,
6973         .map_queues = pqi_map_queues,
6974         .sdev_attrs = pqi_sdev_attrs,
6975         .shost_attrs = pqi_shost_attrs,
6976 };
6977
6978 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
6979 {
6980         int rc;
6981         struct Scsi_Host *shost;
6982
6983         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
6984         if (!shost) {
6985                 dev_err(&ctrl_info->pci_dev->dev, "scsi_host_alloc failed\n");
6986                 return -ENOMEM;
6987         }
6988
6989         shost->io_port = 0;
6990         shost->n_io_port = 0;
6991         shost->this_id = -1;
6992         shost->max_channel = PQI_MAX_BUS;
6993         shost->max_cmd_len = MAX_COMMAND_SIZE;
6994         shost->max_lun = ~0;
6995         shost->max_id = ~0;
6996         shost->max_sectors = ctrl_info->max_sectors;
6997         shost->can_queue = ctrl_info->scsi_ml_can_queue;
6998         shost->cmd_per_lun = shost->can_queue;
6999         shost->sg_tablesize = ctrl_info->sg_tablesize;
7000         shost->transportt = pqi_sas_transport_template;
7001         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
7002         shost->unique_id = shost->irq;
7003         shost->nr_hw_queues = ctrl_info->num_queue_groups;
7004         shost->host_tagset = 1;
7005         shost->hostdata[0] = (unsigned long)ctrl_info;
7006
7007         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
7008         if (rc) {
7009                 dev_err(&ctrl_info->pci_dev->dev, "scsi_add_host failed\n");
7010                 goto free_host;
7011         }
7012
7013         rc = pqi_add_sas_host(shost, ctrl_info);
7014         if (rc) {
7015                 dev_err(&ctrl_info->pci_dev->dev, "add SAS host failed\n");
7016                 goto remove_host;
7017         }
7018
7019         ctrl_info->scsi_host = shost;
7020
7021         return 0;
7022
7023 remove_host:
7024         scsi_remove_host(shost);
7025 free_host:
7026         scsi_host_put(shost);
7027
7028         return rc;
7029 }
7030
7031 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
7032 {
7033         struct Scsi_Host *shost;
7034
7035         pqi_delete_sas_host(ctrl_info);
7036
7037         shost = ctrl_info->scsi_host;
7038         if (!shost)
7039                 return;
7040
7041         scsi_remove_host(shost);
7042         scsi_host_put(shost);
7043 }
7044
7045 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
7046 {
7047         int rc = 0;
7048         struct pqi_device_registers __iomem *pqi_registers;
7049         unsigned long timeout;
7050         unsigned int timeout_msecs;
7051         union pqi_reset_register reset_reg;
7052
7053         pqi_registers = ctrl_info->pqi_registers;
7054         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
7055         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
7056
7057         while (1) {
7058                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
7059                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
7060                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
7061                         break;
7062                 pqi_check_ctrl_health(ctrl_info);
7063                 if (pqi_ctrl_offline(ctrl_info)) {
7064                         rc = -ENXIO;
7065                         break;
7066                 }
7067                 if (time_after(jiffies, timeout)) {
7068                         rc = -ETIMEDOUT;
7069                         break;
7070                 }
7071         }
7072
7073         return rc;
7074 }
7075
7076 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
7077 {
7078         int rc;
7079         union pqi_reset_register reset_reg;
7080
7081         if (ctrl_info->pqi_reset_quiesce_supported) {
7082                 rc = sis_pqi_reset_quiesce(ctrl_info);
7083                 if (rc) {
7084                         dev_err(&ctrl_info->pci_dev->dev,
7085                                 "PQI reset failed during quiesce with error %d\n", rc);
7086                         return rc;
7087                 }
7088         }
7089
7090         reset_reg.all_bits = 0;
7091         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
7092         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
7093
7094         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
7095
7096         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
7097         if (rc)
7098                 dev_err(&ctrl_info->pci_dev->dev,
7099                         "PQI reset failed with error %d\n", rc);
7100
7101         return rc;
7102 }
7103
7104 static int pqi_get_ctrl_serial_number(struct pqi_ctrl_info *ctrl_info)
7105 {
7106         int rc;
7107         struct bmic_sense_subsystem_info *sense_info;
7108
7109         sense_info = kzalloc(sizeof(*sense_info), GFP_KERNEL);
7110         if (!sense_info)
7111                 return -ENOMEM;
7112
7113         rc = pqi_sense_subsystem_info(ctrl_info, sense_info);
7114         if (rc)
7115                 goto out;
7116
7117         memcpy(ctrl_info->serial_number, sense_info->ctrl_serial_number,
7118                 sizeof(sense_info->ctrl_serial_number));
7119         ctrl_info->serial_number[sizeof(sense_info->ctrl_serial_number)] = '\0';
7120
7121 out:
7122         kfree(sense_info);
7123
7124         return rc;
7125 }
7126
7127 static int pqi_get_ctrl_product_details(struct pqi_ctrl_info *ctrl_info)
7128 {
7129         int rc;
7130         struct bmic_identify_controller *identify;
7131
7132         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
7133         if (!identify)
7134                 return -ENOMEM;
7135
7136         rc = pqi_identify_controller(ctrl_info, identify);
7137         if (rc)
7138                 goto out;
7139
7140         if (get_unaligned_le32(&identify->extra_controller_flags) &
7141                 BMIC_IDENTIFY_EXTRA_FLAGS_LONG_FW_VERSION_SUPPORTED) {
7142                 memcpy(ctrl_info->firmware_version,
7143                         identify->firmware_version_long,
7144                         sizeof(identify->firmware_version_long));
7145         } else {
7146                 memcpy(ctrl_info->firmware_version,
7147                         identify->firmware_version_short,
7148                         sizeof(identify->firmware_version_short));
7149                 ctrl_info->firmware_version
7150                         [sizeof(identify->firmware_version_short)] = '\0';
7151                 snprintf(ctrl_info->firmware_version +
7152                         strlen(ctrl_info->firmware_version),
7153                         sizeof(ctrl_info->firmware_version) -
7154                         sizeof(identify->firmware_version_short),
7155                         "-%u",
7156                         get_unaligned_le16(&identify->firmware_build_number));
7157         }
7158
7159         memcpy(ctrl_info->model, identify->product_id,
7160                 sizeof(identify->product_id));
7161         ctrl_info->model[sizeof(identify->product_id)] = '\0';
7162
7163         memcpy(ctrl_info->vendor, identify->vendor_id,
7164                 sizeof(identify->vendor_id));
7165         ctrl_info->vendor[sizeof(identify->vendor_id)] = '\0';
7166
7167 out:
7168         kfree(identify);
7169
7170         return rc;
7171 }
7172
7173 struct pqi_config_table_section_info {
7174         struct pqi_ctrl_info *ctrl_info;
7175         void            *section;
7176         u32             section_offset;
7177         void __iomem    *section_iomem_addr;
7178 };
7179
7180 static inline bool pqi_is_firmware_feature_supported(
7181         struct pqi_config_table_firmware_features *firmware_features,
7182         unsigned int bit_position)
7183 {
7184         unsigned int byte_index;
7185
7186         byte_index = bit_position / BITS_PER_BYTE;
7187
7188         if (byte_index >= le16_to_cpu(firmware_features->num_elements))
7189                 return false;
7190
7191         return firmware_features->features_supported[byte_index] &
7192                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7193 }
7194
7195 static inline bool pqi_is_firmware_feature_enabled(
7196         struct pqi_config_table_firmware_features *firmware_features,
7197         void __iomem *firmware_features_iomem_addr,
7198         unsigned int bit_position)
7199 {
7200         unsigned int byte_index;
7201         u8 __iomem *features_enabled_iomem_addr;
7202
7203         byte_index = (bit_position / BITS_PER_BYTE) +
7204                 (le16_to_cpu(firmware_features->num_elements) * 2);
7205
7206         features_enabled_iomem_addr = firmware_features_iomem_addr +
7207                 offsetof(struct pqi_config_table_firmware_features,
7208                         features_supported) + byte_index;
7209
7210         return *((__force u8 *)features_enabled_iomem_addr) &
7211                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7212 }
7213
7214 static inline void pqi_request_firmware_feature(
7215         struct pqi_config_table_firmware_features *firmware_features,
7216         unsigned int bit_position)
7217 {
7218         unsigned int byte_index;
7219
7220         byte_index = (bit_position / BITS_PER_BYTE) +
7221                 le16_to_cpu(firmware_features->num_elements);
7222
7223         firmware_features->features_supported[byte_index] |=
7224                 (1 << (bit_position % BITS_PER_BYTE));
7225 }
7226
7227 static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info,
7228         u16 first_section, u16 last_section)
7229 {
7230         struct pqi_vendor_general_request request;
7231
7232         memset(&request, 0, sizeof(request));
7233
7234         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
7235         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
7236                 &request.header.iu_length);
7237         put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE,
7238                 &request.function_code);
7239         put_unaligned_le16(first_section,
7240                 &request.data.config_table_update.first_section);
7241         put_unaligned_le16(last_section,
7242                 &request.data.config_table_update.last_section);
7243
7244         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
7245 }
7246
7247 static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
7248         struct pqi_config_table_firmware_features *firmware_features,
7249         void __iomem *firmware_features_iomem_addr)
7250 {
7251         void *features_requested;
7252         void __iomem *features_requested_iomem_addr;
7253         void __iomem *host_max_known_feature_iomem_addr;
7254
7255         features_requested = firmware_features->features_supported +
7256                 le16_to_cpu(firmware_features->num_elements);
7257
7258         features_requested_iomem_addr = firmware_features_iomem_addr +
7259                 (features_requested - (void *)firmware_features);
7260
7261         memcpy_toio(features_requested_iomem_addr, features_requested,
7262                 le16_to_cpu(firmware_features->num_elements));
7263
7264         if (pqi_is_firmware_feature_supported(firmware_features,
7265                 PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE)) {
7266                 host_max_known_feature_iomem_addr =
7267                         features_requested_iomem_addr +
7268                         (le16_to_cpu(firmware_features->num_elements) * 2) +
7269                         sizeof(__le16);
7270                 writew(PQI_FIRMWARE_FEATURE_MAXIMUM,
7271                         host_max_known_feature_iomem_addr);
7272         }
7273
7274         return pqi_config_table_update(ctrl_info,
7275                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES,
7276                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES);
7277 }
7278
7279 struct pqi_firmware_feature {
7280         char            *feature_name;
7281         unsigned int    feature_bit;
7282         bool            supported;
7283         bool            enabled;
7284         void (*feature_status)(struct pqi_ctrl_info *ctrl_info,
7285                 struct pqi_firmware_feature *firmware_feature);
7286 };
7287
7288 static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info,
7289         struct pqi_firmware_feature *firmware_feature)
7290 {
7291         if (!firmware_feature->supported) {
7292                 dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n",
7293                         firmware_feature->feature_name);
7294                 return;
7295         }
7296
7297         if (firmware_feature->enabled) {
7298                 dev_info(&ctrl_info->pci_dev->dev,
7299                         "%s enabled\n", firmware_feature->feature_name);
7300                 return;
7301         }
7302
7303         dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n",
7304                 firmware_feature->feature_name);
7305 }
7306
7307 static void pqi_ctrl_update_feature_flags(struct pqi_ctrl_info *ctrl_info,
7308         struct pqi_firmware_feature *firmware_feature)
7309 {
7310         switch (firmware_feature->feature_bit) {
7311         case PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS:
7312                 ctrl_info->enable_r1_writes = firmware_feature->enabled;
7313                 break;
7314         case PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS:
7315                 ctrl_info->enable_r5_writes = firmware_feature->enabled;
7316                 break;
7317         case PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS:
7318                 ctrl_info->enable_r6_writes = firmware_feature->enabled;
7319                 break;
7320         case PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE:
7321                 ctrl_info->soft_reset_handshake_supported =
7322                         firmware_feature->enabled &&
7323                         pqi_read_soft_reset_status(ctrl_info);
7324                 break;
7325         case PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT:
7326                 ctrl_info->raid_iu_timeout_supported = firmware_feature->enabled;
7327                 break;
7328         case PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT:
7329                 ctrl_info->tmf_iu_timeout_supported = firmware_feature->enabled;
7330                 break;
7331         case PQI_FIRMWARE_FEATURE_UNIQUE_WWID_IN_REPORT_PHYS_LUN:
7332                 ctrl_info->unique_wwid_in_report_phys_lun_supported =
7333                         firmware_feature->enabled;
7334                 break;
7335                 pqi_save_fw_triage_setting(ctrl_info, firmware_feature->enabled);
7336         }
7337
7338         pqi_firmware_feature_status(ctrl_info, firmware_feature);
7339 }
7340
7341 static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info,
7342         struct pqi_firmware_feature *firmware_feature)
7343 {
7344         if (firmware_feature->feature_status)
7345                 firmware_feature->feature_status(ctrl_info, firmware_feature);
7346 }
7347
7348 static DEFINE_MUTEX(pqi_firmware_features_mutex);
7349
7350 static struct pqi_firmware_feature pqi_firmware_features[] = {
7351         {
7352                 .feature_name = "Online Firmware Activation",
7353                 .feature_bit = PQI_FIRMWARE_FEATURE_OFA,
7354                 .feature_status = pqi_firmware_feature_status,
7355         },
7356         {
7357                 .feature_name = "Serial Management Protocol",
7358                 .feature_bit = PQI_FIRMWARE_FEATURE_SMP,
7359                 .feature_status = pqi_firmware_feature_status,
7360         },
7361         {
7362                 .feature_name = "Maximum Known Feature",
7363                 .feature_bit = PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE,
7364                 .feature_status = pqi_firmware_feature_status,
7365         },
7366         {
7367                 .feature_name = "RAID 0 Read Bypass",
7368                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_READ_BYPASS,
7369                 .feature_status = pqi_firmware_feature_status,
7370         },
7371         {
7372                 .feature_name = "RAID 1 Read Bypass",
7373                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_READ_BYPASS,
7374                 .feature_status = pqi_firmware_feature_status,
7375         },
7376         {
7377                 .feature_name = "RAID 5 Read Bypass",
7378                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_READ_BYPASS,
7379                 .feature_status = pqi_firmware_feature_status,
7380         },
7381         {
7382                 .feature_name = "RAID 6 Read Bypass",
7383                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_READ_BYPASS,
7384                 .feature_status = pqi_firmware_feature_status,
7385         },
7386         {
7387                 .feature_name = "RAID 0 Write Bypass",
7388                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_WRITE_BYPASS,
7389                 .feature_status = pqi_firmware_feature_status,
7390         },
7391         {
7392                 .feature_name = "RAID 1 Write Bypass",
7393                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS,
7394                 .feature_status = pqi_ctrl_update_feature_flags,
7395         },
7396         {
7397                 .feature_name = "RAID 5 Write Bypass",
7398                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS,
7399                 .feature_status = pqi_ctrl_update_feature_flags,
7400         },
7401         {
7402                 .feature_name = "RAID 6 Write Bypass",
7403                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS,
7404                 .feature_status = pqi_ctrl_update_feature_flags,
7405         },
7406         {
7407                 .feature_name = "New Soft Reset Handshake",
7408                 .feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE,
7409                 .feature_status = pqi_ctrl_update_feature_flags,
7410         },
7411         {
7412                 .feature_name = "RAID IU Timeout",
7413                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT,
7414                 .feature_status = pqi_ctrl_update_feature_flags,
7415         },
7416         {
7417                 .feature_name = "TMF IU Timeout",
7418                 .feature_bit = PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT,
7419                 .feature_status = pqi_ctrl_update_feature_flags,
7420         },
7421         {
7422                 .feature_name = "RAID Bypass on encrypted logical volumes on NVMe",
7423                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_BYPASS_ON_ENCRYPTED_NVME,
7424                 .feature_status = pqi_firmware_feature_status,
7425         },
7426         {
7427                 .feature_name = "Unique WWID in Report Physical LUN",
7428                 .feature_bit = PQI_FIRMWARE_FEATURE_UNIQUE_WWID_IN_REPORT_PHYS_LUN,
7429                 .feature_status = pqi_ctrl_update_feature_flags,
7430         },
7431 };
7432
7433 static void pqi_process_firmware_features(
7434         struct pqi_config_table_section_info *section_info)
7435 {
7436         int rc;
7437         struct pqi_ctrl_info *ctrl_info;
7438         struct pqi_config_table_firmware_features *firmware_features;
7439         void __iomem *firmware_features_iomem_addr;
7440         unsigned int i;
7441         unsigned int num_features_supported;
7442
7443         ctrl_info = section_info->ctrl_info;
7444         firmware_features = section_info->section;
7445         firmware_features_iomem_addr = section_info->section_iomem_addr;
7446
7447         for (i = 0, num_features_supported = 0;
7448                 i < ARRAY_SIZE(pqi_firmware_features); i++) {
7449                 if (pqi_is_firmware_feature_supported(firmware_features,
7450                         pqi_firmware_features[i].feature_bit)) {
7451                         pqi_firmware_features[i].supported = true;
7452                         num_features_supported++;
7453                 } else {
7454                         pqi_firmware_feature_update(ctrl_info,
7455                                 &pqi_firmware_features[i]);
7456                 }
7457         }
7458
7459         if (num_features_supported == 0)
7460                 return;
7461
7462         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7463                 if (!pqi_firmware_features[i].supported)
7464                         continue;
7465                 pqi_request_firmware_feature(firmware_features,
7466                         pqi_firmware_features[i].feature_bit);
7467         }
7468
7469         rc = pqi_enable_firmware_features(ctrl_info, firmware_features,
7470                 firmware_features_iomem_addr);
7471         if (rc) {
7472                 dev_err(&ctrl_info->pci_dev->dev,
7473                         "failed to enable firmware features in PQI configuration table\n");
7474                 for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7475                         if (!pqi_firmware_features[i].supported)
7476                                 continue;
7477                         pqi_firmware_feature_update(ctrl_info,
7478                                 &pqi_firmware_features[i]);
7479                 }
7480                 return;
7481         }
7482
7483         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7484                 if (!pqi_firmware_features[i].supported)
7485                         continue;
7486                 if (pqi_is_firmware_feature_enabled(firmware_features,
7487                         firmware_features_iomem_addr,
7488                         pqi_firmware_features[i].feature_bit)) {
7489                                 pqi_firmware_features[i].enabled = true;
7490                 }
7491                 pqi_firmware_feature_update(ctrl_info,
7492                         &pqi_firmware_features[i]);
7493         }
7494 }
7495
7496 static void pqi_init_firmware_features(void)
7497 {
7498         unsigned int i;
7499
7500         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7501                 pqi_firmware_features[i].supported = false;
7502                 pqi_firmware_features[i].enabled = false;
7503         }
7504 }
7505
7506 static void pqi_process_firmware_features_section(
7507         struct pqi_config_table_section_info *section_info)
7508 {
7509         mutex_lock(&pqi_firmware_features_mutex);
7510         pqi_init_firmware_features();
7511         pqi_process_firmware_features(section_info);
7512         mutex_unlock(&pqi_firmware_features_mutex);
7513 }
7514
7515 /*
7516  * Reset all controller settings that can be initialized during the processing
7517  * of the PQI Configuration Table.
7518  */
7519
7520 static void pqi_ctrl_reset_config(struct pqi_ctrl_info *ctrl_info)
7521 {
7522         ctrl_info->heartbeat_counter = NULL;
7523         ctrl_info->soft_reset_status = NULL;
7524         ctrl_info->soft_reset_handshake_supported = false;
7525         ctrl_info->enable_r1_writes = false;
7526         ctrl_info->enable_r5_writes = false;
7527         ctrl_info->enable_r6_writes = false;
7528         ctrl_info->raid_iu_timeout_supported = false;
7529         ctrl_info->tmf_iu_timeout_supported = false;
7530         ctrl_info->unique_wwid_in_report_phys_lun_supported = false;
7531 }
7532
7533 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
7534 {
7535         u32 table_length;
7536         u32 section_offset;
7537         bool firmware_feature_section_present;
7538         void __iomem *table_iomem_addr;
7539         struct pqi_config_table *config_table;
7540         struct pqi_config_table_section_header *section;
7541         struct pqi_config_table_section_info section_info;
7542         struct pqi_config_table_section_info feature_section_info;
7543
7544         table_length = ctrl_info->config_table_length;
7545         if (table_length == 0)
7546                 return 0;
7547
7548         config_table = kmalloc(table_length, GFP_KERNEL);
7549         if (!config_table) {
7550                 dev_err(&ctrl_info->pci_dev->dev,
7551                         "failed to allocate memory for PQI configuration table\n");
7552                 return -ENOMEM;
7553         }
7554
7555         /*
7556          * Copy the config table contents from I/O memory space into the
7557          * temporary buffer.
7558          */
7559         table_iomem_addr = ctrl_info->iomem_base + ctrl_info->config_table_offset;
7560         memcpy_fromio(config_table, table_iomem_addr, table_length);
7561
7562         firmware_feature_section_present = false;
7563         section_info.ctrl_info = ctrl_info;
7564         section_offset = get_unaligned_le32(&config_table->first_section_offset);
7565
7566         while (section_offset) {
7567                 section = (void *)config_table + section_offset;
7568
7569                 section_info.section = section;
7570                 section_info.section_offset = section_offset;
7571                 section_info.section_iomem_addr = table_iomem_addr + section_offset;
7572
7573                 switch (get_unaligned_le16(&section->section_id)) {
7574                 case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES:
7575                         firmware_feature_section_present = true;
7576                         feature_section_info = section_info;
7577                         break;
7578                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
7579                         if (pqi_disable_heartbeat)
7580                                 dev_warn(&ctrl_info->pci_dev->dev,
7581                                 "heartbeat disabled by module parameter\n");
7582                         else
7583                                 ctrl_info->heartbeat_counter =
7584                                         table_iomem_addr +
7585                                         section_offset +
7586                                         offsetof(struct pqi_config_table_heartbeat,
7587                                                 heartbeat_counter);
7588                         break;
7589                 case PQI_CONFIG_TABLE_SECTION_SOFT_RESET:
7590                         ctrl_info->soft_reset_status =
7591                                 table_iomem_addr +
7592                                 section_offset +
7593                                 offsetof(struct pqi_config_table_soft_reset,
7594                                         soft_reset_status);
7595                         break;
7596                 }
7597
7598                 section_offset = get_unaligned_le16(&section->next_section_offset);
7599         }
7600
7601         /*
7602          * We process the firmware feature section after all other sections
7603          * have been processed so that the feature bit callbacks can take
7604          * into account the settings configured by other sections.
7605          */
7606         if (firmware_feature_section_present)
7607                 pqi_process_firmware_features_section(&feature_section_info);
7608
7609         kfree(config_table);
7610
7611         return 0;
7612 }
7613
7614 /* Switches the controller from PQI mode back into SIS mode. */
7615
7616 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
7617 {
7618         int rc;
7619
7620         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
7621         rc = pqi_reset(ctrl_info);
7622         if (rc)
7623                 return rc;
7624         rc = sis_reenable_sis_mode(ctrl_info);
7625         if (rc) {
7626                 dev_err(&ctrl_info->pci_dev->dev,
7627                         "re-enabling SIS mode failed with error %d\n", rc);
7628                 return rc;
7629         }
7630         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7631
7632         return 0;
7633 }
7634
7635 /*
7636  * If the controller isn't already in SIS mode, this function forces it into
7637  * SIS mode.
7638  */
7639
7640 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
7641 {
7642         if (!sis_is_firmware_running(ctrl_info))
7643                 return -ENXIO;
7644
7645         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
7646                 return 0;
7647
7648         if (sis_is_kernel_up(ctrl_info)) {
7649                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7650                 return 0;
7651         }
7652
7653         return pqi_revert_to_sis_mode(ctrl_info);
7654 }
7655
7656 static void pqi_perform_lockup_action(void)
7657 {
7658         switch (pqi_lockup_action) {
7659         case PANIC:
7660                 panic("FATAL: Smart Family Controller lockup detected");
7661                 break;
7662         case REBOOT:
7663                 emergency_restart();
7664                 break;
7665         case NONE:
7666         default:
7667                 break;
7668         }
7669 }
7670
7671 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
7672 {
7673         int rc;
7674         u32 product_id;
7675
7676         if (reset_devices) {
7677                 if (pqi_is_fw_triage_supported(ctrl_info)) {
7678                         rc = sis_wait_for_fw_triage_completion(ctrl_info);
7679                         if (rc)
7680                                 return rc;
7681                 }
7682                 sis_soft_reset(ctrl_info);
7683                 msleep(PQI_POST_RESET_DELAY_SECS * PQI_HZ);
7684         } else {
7685                 rc = pqi_force_sis_mode(ctrl_info);
7686                 if (rc)
7687                         return rc;
7688         }
7689
7690         /*
7691          * Wait until the controller is ready to start accepting SIS
7692          * commands.
7693          */
7694         rc = sis_wait_for_ctrl_ready(ctrl_info);
7695         if (rc) {
7696                 if (reset_devices) {
7697                         dev_err(&ctrl_info->pci_dev->dev,
7698                                 "kdump init failed with error %d\n", rc);
7699                         pqi_lockup_action = REBOOT;
7700                         pqi_perform_lockup_action();
7701                 }
7702                 return rc;
7703         }
7704
7705         /*
7706          * Get the controller properties.  This allows us to determine
7707          * whether or not it supports PQI mode.
7708          */
7709         rc = sis_get_ctrl_properties(ctrl_info);
7710         if (rc) {
7711                 dev_err(&ctrl_info->pci_dev->dev,
7712                         "error obtaining controller properties\n");
7713                 return rc;
7714         }
7715
7716         rc = sis_get_pqi_capabilities(ctrl_info);
7717         if (rc) {
7718                 dev_err(&ctrl_info->pci_dev->dev,
7719                         "error obtaining controller capabilities\n");
7720                 return rc;
7721         }
7722
7723         product_id = sis_get_product_id(ctrl_info);
7724         ctrl_info->product_id = (u8)product_id;
7725         ctrl_info->product_revision = (u8)(product_id >> 8);
7726
7727         if (reset_devices) {
7728                 if (ctrl_info->max_outstanding_requests >
7729                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
7730                                 ctrl_info->max_outstanding_requests =
7731                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
7732         } else {
7733                 if (ctrl_info->max_outstanding_requests >
7734                         PQI_MAX_OUTSTANDING_REQUESTS)
7735                                 ctrl_info->max_outstanding_requests =
7736                                         PQI_MAX_OUTSTANDING_REQUESTS;
7737         }
7738
7739         pqi_calculate_io_resources(ctrl_info);
7740
7741         rc = pqi_alloc_error_buffer(ctrl_info);
7742         if (rc) {
7743                 dev_err(&ctrl_info->pci_dev->dev,
7744                         "failed to allocate PQI error buffer\n");
7745                 return rc;
7746         }
7747
7748         /*
7749          * If the function we are about to call succeeds, the
7750          * controller will transition from legacy SIS mode
7751          * into PQI mode.
7752          */
7753         rc = sis_init_base_struct_addr(ctrl_info);
7754         if (rc) {
7755                 dev_err(&ctrl_info->pci_dev->dev,
7756                         "error initializing PQI mode\n");
7757                 return rc;
7758         }
7759
7760         /* Wait for the controller to complete the SIS -> PQI transition. */
7761         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
7762         if (rc) {
7763                 dev_err(&ctrl_info->pci_dev->dev,
7764                         "transition to PQI mode failed\n");
7765                 return rc;
7766         }
7767
7768         /* From here on, we are running in PQI mode. */
7769         ctrl_info->pqi_mode_enabled = true;
7770         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7771
7772         rc = pqi_alloc_admin_queues(ctrl_info);
7773         if (rc) {
7774                 dev_err(&ctrl_info->pci_dev->dev,
7775                         "failed to allocate admin queues\n");
7776                 return rc;
7777         }
7778
7779         rc = pqi_create_admin_queues(ctrl_info);
7780         if (rc) {
7781                 dev_err(&ctrl_info->pci_dev->dev,
7782                         "error creating admin queues\n");
7783                 return rc;
7784         }
7785
7786         rc = pqi_report_device_capability(ctrl_info);
7787         if (rc) {
7788                 dev_err(&ctrl_info->pci_dev->dev,
7789                         "obtaining device capability failed\n");
7790                 return rc;
7791         }
7792
7793         rc = pqi_validate_device_capability(ctrl_info);
7794         if (rc)
7795                 return rc;
7796
7797         pqi_calculate_queue_resources(ctrl_info);
7798
7799         rc = pqi_enable_msix_interrupts(ctrl_info);
7800         if (rc)
7801                 return rc;
7802
7803         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
7804                 ctrl_info->max_msix_vectors =
7805                         ctrl_info->num_msix_vectors_enabled;
7806                 pqi_calculate_queue_resources(ctrl_info);
7807         }
7808
7809         rc = pqi_alloc_io_resources(ctrl_info);
7810         if (rc)
7811                 return rc;
7812
7813         rc = pqi_alloc_operational_queues(ctrl_info);
7814         if (rc) {
7815                 dev_err(&ctrl_info->pci_dev->dev,
7816                         "failed to allocate operational queues\n");
7817                 return rc;
7818         }
7819
7820         pqi_init_operational_queues(ctrl_info);
7821
7822         rc = pqi_create_queues(ctrl_info);
7823         if (rc)
7824                 return rc;
7825
7826         rc = pqi_request_irqs(ctrl_info);
7827         if (rc)
7828                 return rc;
7829
7830         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
7831
7832         ctrl_info->controller_online = true;
7833
7834         rc = pqi_process_config_table(ctrl_info);
7835         if (rc)
7836                 return rc;
7837
7838         pqi_start_heartbeat_timer(ctrl_info);
7839
7840         if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
7841                 rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
7842                 if (rc) { /* Supported features not returned correctly. */
7843                         dev_err(&ctrl_info->pci_dev->dev,
7844                                 "error obtaining advanced RAID bypass configuration\n");
7845                         return rc;
7846                 }
7847                 ctrl_info->ciss_report_log_flags |=
7848                         CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
7849         }
7850
7851         rc = pqi_enable_events(ctrl_info);
7852         if (rc) {
7853                 dev_err(&ctrl_info->pci_dev->dev,
7854                         "error enabling events\n");
7855                 return rc;
7856         }
7857
7858         /* Register with the SCSI subsystem. */
7859         rc = pqi_register_scsi(ctrl_info);
7860         if (rc)
7861                 return rc;
7862
7863         rc = pqi_get_ctrl_product_details(ctrl_info);
7864         if (rc) {
7865                 dev_err(&ctrl_info->pci_dev->dev,
7866                         "error obtaining product details\n");
7867                 return rc;
7868         }
7869
7870         rc = pqi_get_ctrl_serial_number(ctrl_info);
7871         if (rc) {
7872                 dev_err(&ctrl_info->pci_dev->dev,
7873                         "error obtaining ctrl serial number\n");
7874                 return rc;
7875         }
7876
7877         rc = pqi_set_diag_rescan(ctrl_info);
7878         if (rc) {
7879                 dev_err(&ctrl_info->pci_dev->dev,
7880                         "error enabling multi-lun rescan\n");
7881                 return rc;
7882         }
7883
7884         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
7885         if (rc) {
7886                 dev_err(&ctrl_info->pci_dev->dev,
7887                         "error updating host wellness\n");
7888                 return rc;
7889         }
7890
7891         pqi_schedule_update_time_worker(ctrl_info);
7892
7893         pqi_scan_scsi_devices(ctrl_info);
7894
7895         return 0;
7896 }
7897
7898 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
7899 {
7900         unsigned int i;
7901         struct pqi_admin_queues *admin_queues;
7902         struct pqi_event_queue *event_queue;
7903
7904         admin_queues = &ctrl_info->admin_queues;
7905         admin_queues->iq_pi_copy = 0;
7906         admin_queues->oq_ci_copy = 0;
7907         writel(0, admin_queues->oq_pi);
7908
7909         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
7910                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
7911                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
7912                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
7913
7914                 writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]);
7915                 writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]);
7916                 writel(0, ctrl_info->queue_groups[i].oq_pi);
7917         }
7918
7919         event_queue = &ctrl_info->event_queue;
7920         writel(0, event_queue->oq_pi);
7921         event_queue->oq_ci_copy = 0;
7922 }
7923
7924 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
7925 {
7926         int rc;
7927
7928         rc = pqi_force_sis_mode(ctrl_info);
7929         if (rc)
7930                 return rc;
7931
7932         /*
7933          * Wait until the controller is ready to start accepting SIS
7934          * commands.
7935          */
7936         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
7937         if (rc)
7938                 return rc;
7939
7940         /*
7941          * Get the controller properties.  This allows us to determine
7942          * whether or not it supports PQI mode.
7943          */
7944         rc = sis_get_ctrl_properties(ctrl_info);
7945         if (rc) {
7946                 dev_err(&ctrl_info->pci_dev->dev,
7947                         "error obtaining controller properties\n");
7948                 return rc;
7949         }
7950
7951         rc = sis_get_pqi_capabilities(ctrl_info);
7952         if (rc) {
7953                 dev_err(&ctrl_info->pci_dev->dev,
7954                         "error obtaining controller capabilities\n");
7955                 return rc;
7956         }
7957
7958         /*
7959          * If the function we are about to call succeeds, the
7960          * controller will transition from legacy SIS mode
7961          * into PQI mode.
7962          */
7963         rc = sis_init_base_struct_addr(ctrl_info);
7964         if (rc) {
7965                 dev_err(&ctrl_info->pci_dev->dev,
7966                         "error initializing PQI mode\n");
7967                 return rc;
7968         }
7969
7970         /* Wait for the controller to complete the SIS -> PQI transition. */
7971         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
7972         if (rc) {
7973                 dev_err(&ctrl_info->pci_dev->dev,
7974                         "transition to PQI mode failed\n");
7975                 return rc;
7976         }
7977
7978         /* From here on, we are running in PQI mode. */
7979         ctrl_info->pqi_mode_enabled = true;
7980         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7981
7982         pqi_reinit_queues(ctrl_info);
7983
7984         rc = pqi_create_admin_queues(ctrl_info);
7985         if (rc) {
7986                 dev_err(&ctrl_info->pci_dev->dev,
7987                         "error creating admin queues\n");
7988                 return rc;
7989         }
7990
7991         rc = pqi_create_queues(ctrl_info);
7992         if (rc)
7993                 return rc;
7994
7995         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
7996
7997         ctrl_info->controller_online = true;
7998         pqi_ctrl_unblock_requests(ctrl_info);
7999
8000         pqi_ctrl_reset_config(ctrl_info);
8001
8002         rc = pqi_process_config_table(ctrl_info);
8003         if (rc)
8004                 return rc;
8005
8006         pqi_start_heartbeat_timer(ctrl_info);
8007
8008         if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
8009                 rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
8010                 if (rc) {
8011                         dev_err(&ctrl_info->pci_dev->dev,
8012                                 "error obtaining advanced RAID bypass configuration\n");
8013                         return rc;
8014                 }
8015                 ctrl_info->ciss_report_log_flags |=
8016                         CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
8017         }
8018
8019         rc = pqi_enable_events(ctrl_info);
8020         if (rc) {
8021                 dev_err(&ctrl_info->pci_dev->dev,
8022                         "error enabling events\n");
8023                 return rc;
8024         }
8025
8026         rc = pqi_get_ctrl_product_details(ctrl_info);
8027         if (rc) {
8028                 dev_err(&ctrl_info->pci_dev->dev,
8029                         "error obtaining product details\n");
8030                 return rc;
8031         }
8032
8033         rc = pqi_set_diag_rescan(ctrl_info);
8034         if (rc) {
8035                 dev_err(&ctrl_info->pci_dev->dev,
8036                         "error enabling multi-lun rescan\n");
8037                 return rc;
8038         }
8039
8040         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
8041         if (rc) {
8042                 dev_err(&ctrl_info->pci_dev->dev,
8043                         "error updating host wellness\n");
8044                 return rc;
8045         }
8046
8047         if (pqi_ofa_in_progress(ctrl_info))
8048                 pqi_ctrl_unblock_scan(ctrl_info);
8049
8050         pqi_scan_scsi_devices(ctrl_info);
8051
8052         return 0;
8053 }
8054
8055 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev, u16 timeout)
8056 {
8057         int rc;
8058
8059         rc = pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
8060                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
8061
8062         return pcibios_err_to_errno(rc);
8063 }
8064
8065 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
8066 {
8067         int rc;
8068         u64 mask;
8069
8070         rc = pci_enable_device(ctrl_info->pci_dev);
8071         if (rc) {
8072                 dev_err(&ctrl_info->pci_dev->dev,
8073                         "failed to enable PCI device\n");
8074                 return rc;
8075         }
8076
8077         if (sizeof(dma_addr_t) > 4)
8078                 mask = DMA_BIT_MASK(64);
8079         else
8080                 mask = DMA_BIT_MASK(32);
8081
8082         rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask);
8083         if (rc) {
8084                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
8085                 goto disable_device;
8086         }
8087
8088         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
8089         if (rc) {
8090                 dev_err(&ctrl_info->pci_dev->dev,
8091                         "failed to obtain PCI resources\n");
8092                 goto disable_device;
8093         }
8094
8095         ctrl_info->iomem_base = ioremap(pci_resource_start(
8096                 ctrl_info->pci_dev, 0),
8097                 sizeof(struct pqi_ctrl_registers));
8098         if (!ctrl_info->iomem_base) {
8099                 dev_err(&ctrl_info->pci_dev->dev,
8100                         "failed to map memory for controller registers\n");
8101                 rc = -ENOMEM;
8102                 goto release_regions;
8103         }
8104
8105 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
8106
8107         /* Increase the PCIe completion timeout. */
8108         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
8109                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
8110         if (rc) {
8111                 dev_err(&ctrl_info->pci_dev->dev,
8112                         "failed to set PCIe completion timeout\n");
8113                 goto release_regions;
8114         }
8115
8116         /* Enable bus mastering. */
8117         pci_set_master(ctrl_info->pci_dev);
8118
8119         ctrl_info->registers = ctrl_info->iomem_base;
8120         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
8121
8122         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
8123
8124         return 0;
8125
8126 release_regions:
8127         pci_release_regions(ctrl_info->pci_dev);
8128 disable_device:
8129         pci_disable_device(ctrl_info->pci_dev);
8130
8131         return rc;
8132 }
8133
8134 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
8135 {
8136         iounmap(ctrl_info->iomem_base);
8137         pci_release_regions(ctrl_info->pci_dev);
8138         if (pci_is_enabled(ctrl_info->pci_dev))
8139                 pci_disable_device(ctrl_info->pci_dev);
8140         pci_set_drvdata(ctrl_info->pci_dev, NULL);
8141 }
8142
8143 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
8144 {
8145         struct pqi_ctrl_info *ctrl_info;
8146
8147         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
8148                         GFP_KERNEL, numa_node);
8149         if (!ctrl_info)
8150                 return NULL;
8151
8152         mutex_init(&ctrl_info->scan_mutex);
8153         mutex_init(&ctrl_info->lun_reset_mutex);
8154         mutex_init(&ctrl_info->ofa_mutex);
8155
8156         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
8157         spin_lock_init(&ctrl_info->scsi_device_list_lock);
8158
8159         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
8160         atomic_set(&ctrl_info->num_interrupts, 0);
8161
8162         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
8163         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
8164
8165         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
8166         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
8167
8168         INIT_WORK(&ctrl_info->ofa_memory_alloc_work, pqi_ofa_memory_alloc_worker);
8169         INIT_WORK(&ctrl_info->ofa_quiesce_work, pqi_ofa_quiesce_worker);
8170
8171         sema_init(&ctrl_info->sync_request_sem,
8172                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
8173         init_waitqueue_head(&ctrl_info->block_requests_wait);
8174
8175         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
8176         ctrl_info->irq_mode = IRQ_MODE_NONE;
8177         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
8178
8179         ctrl_info->ciss_report_log_flags = CISS_REPORT_LOG_FLAG_UNIQUE_LUN_ID;
8180         ctrl_info->max_transfer_encrypted_sas_sata =
8181                 PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_SAS_SATA;
8182         ctrl_info->max_transfer_encrypted_nvme =
8183                 PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_NVME;
8184         ctrl_info->max_write_raid_5_6 = PQI_DEFAULT_MAX_WRITE_RAID_5_6;
8185         ctrl_info->max_write_raid_1_10_2drive = ~0;
8186         ctrl_info->max_write_raid_1_10_3drive = ~0;
8187
8188         return ctrl_info;
8189 }
8190
8191 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
8192 {
8193         kfree(ctrl_info);
8194 }
8195
8196 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
8197 {
8198         pqi_free_irqs(ctrl_info);
8199         pqi_disable_msix_interrupts(ctrl_info);
8200 }
8201
8202 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
8203 {
8204         pqi_stop_heartbeat_timer(ctrl_info);
8205         pqi_free_interrupts(ctrl_info);
8206         if (ctrl_info->queue_memory_base)
8207                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8208                         ctrl_info->queue_memory_length,
8209                         ctrl_info->queue_memory_base,
8210                         ctrl_info->queue_memory_base_dma_handle);
8211         if (ctrl_info->admin_queue_memory_base)
8212                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8213                         ctrl_info->admin_queue_memory_length,
8214                         ctrl_info->admin_queue_memory_base,
8215                         ctrl_info->admin_queue_memory_base_dma_handle);
8216         pqi_free_all_io_requests(ctrl_info);
8217         if (ctrl_info->error_buffer)
8218                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8219                         ctrl_info->error_buffer_length,
8220                         ctrl_info->error_buffer,
8221                         ctrl_info->error_buffer_dma_handle);
8222         if (ctrl_info->iomem_base)
8223                 pqi_cleanup_pci_init(ctrl_info);
8224         pqi_free_ctrl_info(ctrl_info);
8225 }
8226
8227 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
8228 {
8229         pqi_cancel_rescan_worker(ctrl_info);
8230         pqi_cancel_update_time_worker(ctrl_info);
8231         pqi_unregister_scsi(ctrl_info);
8232         if (ctrl_info->pqi_mode_enabled)
8233                 pqi_revert_to_sis_mode(ctrl_info);
8234         pqi_free_ctrl_resources(ctrl_info);
8235 }
8236
8237 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info)
8238 {
8239         pqi_ctrl_block_scan(ctrl_info);
8240         pqi_scsi_block_requests(ctrl_info);
8241         pqi_ctrl_block_device_reset(ctrl_info);
8242         pqi_ctrl_block_requests(ctrl_info);
8243         pqi_ctrl_wait_until_quiesced(ctrl_info);
8244         pqi_stop_heartbeat_timer(ctrl_info);
8245 }
8246
8247 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info)
8248 {
8249         pqi_start_heartbeat_timer(ctrl_info);
8250         pqi_ctrl_unblock_requests(ctrl_info);
8251         pqi_ctrl_unblock_device_reset(ctrl_info);
8252         pqi_scsi_unblock_requests(ctrl_info);
8253         pqi_ctrl_unblock_scan(ctrl_info);
8254 }
8255
8256 static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info, u32 total_size, u32 chunk_size)
8257 {
8258         int i;
8259         u32 sg_count;
8260         struct device *dev;
8261         struct pqi_ofa_memory *ofap;
8262         struct pqi_sg_descriptor *mem_descriptor;
8263         dma_addr_t dma_handle;
8264
8265         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8266
8267         sg_count = DIV_ROUND_UP(total_size, chunk_size);
8268         if (sg_count == 0 || sg_count > PQI_OFA_MAX_SG_DESCRIPTORS)
8269                 goto out;
8270
8271         ctrl_info->pqi_ofa_chunk_virt_addr = kmalloc_array(sg_count, sizeof(void *), GFP_KERNEL);
8272         if (!ctrl_info->pqi_ofa_chunk_virt_addr)
8273                 goto out;
8274
8275         dev = &ctrl_info->pci_dev->dev;
8276
8277         for (i = 0; i < sg_count; i++) {
8278                 ctrl_info->pqi_ofa_chunk_virt_addr[i] =
8279                         dma_alloc_coherent(dev, chunk_size, &dma_handle, GFP_KERNEL);
8280                 if (!ctrl_info->pqi_ofa_chunk_virt_addr[i])
8281                         goto out_free_chunks;
8282                 mem_descriptor = &ofap->sg_descriptor[i];
8283                 put_unaligned_le64((u64)dma_handle, &mem_descriptor->address);
8284                 put_unaligned_le32(chunk_size, &mem_descriptor->length);
8285         }
8286
8287         put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags);
8288         put_unaligned_le16(sg_count, &ofap->num_memory_descriptors);
8289         put_unaligned_le32(sg_count * chunk_size, &ofap->bytes_allocated);
8290
8291         return 0;
8292
8293 out_free_chunks:
8294         while (--i >= 0) {
8295                 mem_descriptor = &ofap->sg_descriptor[i];
8296                 dma_free_coherent(dev, chunk_size,
8297                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
8298                         get_unaligned_le64(&mem_descriptor->address));
8299         }
8300         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8301
8302 out:
8303         return -ENOMEM;
8304 }
8305
8306 static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info)
8307 {
8308         u32 total_size;
8309         u32 chunk_size;
8310         u32 min_chunk_size;
8311
8312         if (ctrl_info->ofa_bytes_requested == 0)
8313                 return 0;
8314
8315         total_size = PAGE_ALIGN(ctrl_info->ofa_bytes_requested);
8316         min_chunk_size = DIV_ROUND_UP(total_size, PQI_OFA_MAX_SG_DESCRIPTORS);
8317         min_chunk_size = PAGE_ALIGN(min_chunk_size);
8318
8319         for (chunk_size = total_size; chunk_size >= min_chunk_size;) {
8320                 if (pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_size) == 0)
8321                         return 0;
8322                 chunk_size /= 2;
8323                 chunk_size = PAGE_ALIGN(chunk_size);
8324         }
8325
8326         return -ENOMEM;
8327 }
8328
8329 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info)
8330 {
8331         struct device *dev;
8332         struct pqi_ofa_memory *ofap;
8333
8334         dev = &ctrl_info->pci_dev->dev;
8335
8336         ofap = dma_alloc_coherent(dev, sizeof(*ofap),
8337                 &ctrl_info->pqi_ofa_mem_dma_handle, GFP_KERNEL);
8338         if (!ofap)
8339                 return;
8340
8341         ctrl_info->pqi_ofa_mem_virt_addr = ofap;
8342
8343         if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) {
8344                 dev_err(dev,
8345                         "failed to allocate host buffer for Online Firmware Activation\n");
8346                 dma_free_coherent(dev, sizeof(*ofap), ofap, ctrl_info->pqi_ofa_mem_dma_handle);
8347                 ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8348                 return;
8349         }
8350
8351         put_unaligned_le16(PQI_OFA_VERSION, &ofap->version);
8352         memcpy(&ofap->signature, PQI_OFA_SIGNATURE, sizeof(ofap->signature));
8353 }
8354
8355 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info)
8356 {
8357         unsigned int i;
8358         struct device *dev;
8359         struct pqi_ofa_memory *ofap;
8360         struct pqi_sg_descriptor *mem_descriptor;
8361         unsigned int num_memory_descriptors;
8362
8363         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8364         if (!ofap)
8365                 return;
8366
8367         dev = &ctrl_info->pci_dev->dev;
8368
8369         if (get_unaligned_le32(&ofap->bytes_allocated) == 0)
8370                 goto out;
8371
8372         mem_descriptor = ofap->sg_descriptor;
8373         num_memory_descriptors =
8374                 get_unaligned_le16(&ofap->num_memory_descriptors);
8375
8376         for (i = 0; i < num_memory_descriptors; i++) {
8377                 dma_free_coherent(dev,
8378                         get_unaligned_le32(&mem_descriptor[i].length),
8379                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
8380                         get_unaligned_le64(&mem_descriptor[i].address));
8381         }
8382         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8383
8384 out:
8385         dma_free_coherent(dev, sizeof(*ofap), ofap,
8386                 ctrl_info->pqi_ofa_mem_dma_handle);
8387         ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8388 }
8389
8390 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info)
8391 {
8392         u32 buffer_length;
8393         struct pqi_vendor_general_request request;
8394         struct pqi_ofa_memory *ofap;
8395
8396         memset(&request, 0, sizeof(request));
8397
8398         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
8399         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
8400                 &request.header.iu_length);
8401         put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE,
8402                 &request.function_code);
8403
8404         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8405
8406         if (ofap) {
8407                 buffer_length = offsetof(struct pqi_ofa_memory, sg_descriptor) +
8408                         get_unaligned_le16(&ofap->num_memory_descriptors) *
8409                         sizeof(struct pqi_sg_descriptor);
8410
8411                 put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle,
8412                         &request.data.ofa_memory_allocation.buffer_address);
8413                 put_unaligned_le32(buffer_length,
8414                         &request.data.ofa_memory_allocation.buffer_length);
8415         }
8416
8417         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
8418 }
8419
8420 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs)
8421 {
8422         ssleep(delay_secs);
8423
8424         return pqi_ctrl_init_resume(ctrl_info);
8425 }
8426
8427 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
8428         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
8429         .status = SAM_STAT_CHECK_CONDITION,
8430 };
8431
8432 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
8433 {
8434         unsigned int i;
8435         struct pqi_io_request *io_request;
8436         struct scsi_cmnd *scmd;
8437
8438         for (i = 0; i < ctrl_info->max_io_slots; i++) {
8439                 io_request = &ctrl_info->io_request_pool[i];
8440                 if (atomic_read(&io_request->refcount) == 0)
8441                         continue;
8442
8443                 scmd = io_request->scmd;
8444                 if (scmd) {
8445                         set_host_byte(scmd, DID_NO_CONNECT);
8446                 } else {
8447                         io_request->status = -ENXIO;
8448                         io_request->error_info =
8449                                 &pqi_ctrl_offline_raid_error_info;
8450                 }
8451
8452                 io_request->io_complete_callback(io_request,
8453                         io_request->context);
8454         }
8455 }
8456
8457 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
8458 {
8459         pqi_perform_lockup_action();
8460         pqi_stop_heartbeat_timer(ctrl_info);
8461         pqi_free_interrupts(ctrl_info);
8462         pqi_cancel_rescan_worker(ctrl_info);
8463         pqi_cancel_update_time_worker(ctrl_info);
8464         pqi_ctrl_wait_until_quiesced(ctrl_info);
8465         pqi_fail_all_outstanding_requests(ctrl_info);
8466         pqi_ctrl_unblock_requests(ctrl_info);
8467 }
8468
8469 static void pqi_ctrl_offline_worker(struct work_struct *work)
8470 {
8471         struct pqi_ctrl_info *ctrl_info;
8472
8473         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
8474         pqi_take_ctrl_offline_deferred(ctrl_info);
8475 }
8476
8477 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
8478 {
8479         if (!ctrl_info->controller_online)
8480                 return;
8481
8482         ctrl_info->controller_online = false;
8483         ctrl_info->pqi_mode_enabled = false;
8484         pqi_ctrl_block_requests(ctrl_info);
8485         if (!pqi_disable_ctrl_shutdown)
8486                 sis_shutdown_ctrl(ctrl_info);
8487         pci_disable_device(ctrl_info->pci_dev);
8488         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
8489         schedule_work(&ctrl_info->ctrl_offline_work);
8490 }
8491
8492 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
8493         const struct pci_device_id *id)
8494 {
8495         char *ctrl_description;
8496
8497         if (id->driver_data)
8498                 ctrl_description = (char *)id->driver_data;
8499         else
8500                 ctrl_description = "Microchip Smart Family Controller";
8501
8502         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
8503 }
8504
8505 static int pqi_pci_probe(struct pci_dev *pci_dev,
8506         const struct pci_device_id *id)
8507 {
8508         int rc;
8509         int node, cp_node;
8510         struct pqi_ctrl_info *ctrl_info;
8511
8512         pqi_print_ctrl_info(pci_dev, id);
8513
8514         if (pqi_disable_device_id_wildcards &&
8515                 id->subvendor == PCI_ANY_ID &&
8516                 id->subdevice == PCI_ANY_ID) {
8517                 dev_warn(&pci_dev->dev,
8518                         "controller not probed because device ID wildcards are disabled\n");
8519                 return -ENODEV;
8520         }
8521
8522         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
8523                 dev_warn(&pci_dev->dev,
8524                         "controller device ID matched using wildcards\n");
8525
8526         node = dev_to_node(&pci_dev->dev);
8527         if (node == NUMA_NO_NODE) {
8528                 cp_node = cpu_to_node(0);
8529                 if (cp_node == NUMA_NO_NODE)
8530                         cp_node = 0;
8531                 set_dev_node(&pci_dev->dev, cp_node);
8532         }
8533
8534         ctrl_info = pqi_alloc_ctrl_info(node);
8535         if (!ctrl_info) {
8536                 dev_err(&pci_dev->dev,
8537                         "failed to allocate controller info block\n");
8538                 return -ENOMEM;
8539         }
8540
8541         ctrl_info->pci_dev = pci_dev;
8542
8543         rc = pqi_pci_init(ctrl_info);
8544         if (rc)
8545                 goto error;
8546
8547         rc = pqi_ctrl_init(ctrl_info);
8548         if (rc)
8549                 goto error;
8550
8551         return 0;
8552
8553 error:
8554         pqi_remove_ctrl(ctrl_info);
8555
8556         return rc;
8557 }
8558
8559 static void pqi_pci_remove(struct pci_dev *pci_dev)
8560 {
8561         struct pqi_ctrl_info *ctrl_info;
8562
8563         ctrl_info = pci_get_drvdata(pci_dev);
8564         if (!ctrl_info)
8565                 return;
8566
8567         pqi_remove_ctrl(ctrl_info);
8568 }
8569
8570 static void pqi_crash_if_pending_command(struct pqi_ctrl_info *ctrl_info)
8571 {
8572         unsigned int i;
8573         struct pqi_io_request *io_request;
8574         struct scsi_cmnd *scmd;
8575
8576         for (i = 0; i < ctrl_info->max_io_slots; i++) {
8577                 io_request = &ctrl_info->io_request_pool[i];
8578                 if (atomic_read(&io_request->refcount) == 0)
8579                         continue;
8580                 scmd = io_request->scmd;
8581                 WARN_ON(scmd != NULL); /* IO command from SML */
8582                 WARN_ON(scmd == NULL); /* Non-IO cmd or driver initiated*/
8583         }
8584 }
8585
8586 static void pqi_shutdown(struct pci_dev *pci_dev)
8587 {
8588         int rc;
8589         struct pqi_ctrl_info *ctrl_info;
8590
8591         ctrl_info = pci_get_drvdata(pci_dev);
8592         if (!ctrl_info) {
8593                 dev_err(&pci_dev->dev,
8594                         "cache could not be flushed\n");
8595                 return;
8596         }
8597
8598         pqi_wait_until_ofa_finished(ctrl_info);
8599
8600         pqi_scsi_block_requests(ctrl_info);
8601         pqi_ctrl_block_device_reset(ctrl_info);
8602         pqi_ctrl_block_requests(ctrl_info);
8603         pqi_ctrl_wait_until_quiesced(ctrl_info);
8604
8605         /*
8606          * Write all data in the controller's battery-backed cache to
8607          * storage.
8608          */
8609         rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
8610         if (rc)
8611                 dev_err(&pci_dev->dev,
8612                         "unable to flush controller cache\n");
8613
8614         pqi_crash_if_pending_command(ctrl_info);
8615         pqi_reset(ctrl_info);
8616 }
8617
8618 static void pqi_process_lockup_action_param(void)
8619 {
8620         unsigned int i;
8621
8622         if (!pqi_lockup_action_param)
8623                 return;
8624
8625         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
8626                 if (strcmp(pqi_lockup_action_param,
8627                         pqi_lockup_actions[i].name) == 0) {
8628                         pqi_lockup_action = pqi_lockup_actions[i].action;
8629                         return;
8630                 }
8631         }
8632
8633         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
8634                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
8635 }
8636
8637 static void pqi_process_module_params(void)
8638 {
8639         pqi_process_lockup_action_param();
8640 }
8641
8642 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
8643 {
8644         struct pqi_ctrl_info *ctrl_info;
8645
8646         ctrl_info = pci_get_drvdata(pci_dev);
8647
8648         pqi_wait_until_ofa_finished(ctrl_info);
8649
8650         pqi_ctrl_block_scan(ctrl_info);
8651         pqi_scsi_block_requests(ctrl_info);
8652         pqi_ctrl_block_device_reset(ctrl_info);
8653         pqi_ctrl_block_requests(ctrl_info);
8654         pqi_ctrl_wait_until_quiesced(ctrl_info);
8655         pqi_flush_cache(ctrl_info, SUSPEND);
8656         pqi_stop_heartbeat_timer(ctrl_info);
8657
8658         pqi_crash_if_pending_command(ctrl_info);
8659
8660         if (state.event == PM_EVENT_FREEZE)
8661                 return 0;
8662
8663         pci_save_state(pci_dev);
8664         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
8665
8666         ctrl_info->controller_online = false;
8667         ctrl_info->pqi_mode_enabled = false;
8668
8669         return 0;
8670 }
8671
8672 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
8673 {
8674         int rc;
8675         struct pqi_ctrl_info *ctrl_info;
8676
8677         ctrl_info = pci_get_drvdata(pci_dev);
8678
8679         if (pci_dev->current_state != PCI_D0) {
8680                 ctrl_info->max_hw_queue_index = 0;
8681                 pqi_free_interrupts(ctrl_info);
8682                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
8683                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
8684                         IRQF_SHARED, DRIVER_NAME_SHORT,
8685                         &ctrl_info->queue_groups[0]);
8686                 if (rc) {
8687                         dev_err(&ctrl_info->pci_dev->dev,
8688                                 "irq %u init failed with error %d\n",
8689                                 pci_dev->irq, rc);
8690                         return rc;
8691                 }
8692                 pqi_ctrl_unblock_device_reset(ctrl_info);
8693                 pqi_ctrl_unblock_requests(ctrl_info);
8694                 pqi_scsi_unblock_requests(ctrl_info);
8695                 pqi_ctrl_unblock_scan(ctrl_info);
8696                 return 0;
8697         }
8698
8699         pci_set_power_state(pci_dev, PCI_D0);
8700         pci_restore_state(pci_dev);
8701
8702         pqi_ctrl_unblock_device_reset(ctrl_info);
8703         pqi_ctrl_unblock_requests(ctrl_info);
8704         pqi_scsi_unblock_requests(ctrl_info);
8705         pqi_ctrl_unblock_scan(ctrl_info);
8706
8707         return pqi_ctrl_init_resume(ctrl_info);
8708 }
8709
8710 /* Define the PCI IDs for the controllers that we support. */
8711 static const struct pci_device_id pqi_pci_id_table[] = {
8712         {
8713                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8714                                0x105b, 0x1211)
8715         },
8716         {
8717                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8718                                0x105b, 0x1321)
8719         },
8720         {
8721                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8722                                0x152d, 0x8a22)
8723         },
8724         {
8725                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8726                                0x152d, 0x8a23)
8727         },
8728         {
8729                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8730                                0x152d, 0x8a24)
8731         },
8732         {
8733                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8734                                0x152d, 0x8a36)
8735         },
8736         {
8737                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8738                                0x152d, 0x8a37)
8739         },
8740         {
8741                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8742                                0x193d, 0x8460)
8743         },
8744         {
8745                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8746                                0x193d, 0x1104)
8747         },
8748         {
8749                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8750                                0x193d, 0x1105)
8751         },
8752         {
8753                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8754                                0x193d, 0x1106)
8755         },
8756         {
8757                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8758                                0x193d, 0x1107)
8759         },
8760         {
8761                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8762                                0x193d, 0x1108)
8763         },
8764         {
8765                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8766                                0x193d, 0x1109)
8767         },
8768         {
8769                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8770                                0x193d, 0x8460)
8771         },
8772         {
8773                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8774                                0x193d, 0x8461)
8775         },
8776         {
8777                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8778                                0x193d, 0xc460)
8779         },
8780         {
8781                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8782                                0x193d, 0xc461)
8783         },
8784         {
8785                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8786                                0x193d, 0xf460)
8787         },
8788         {
8789                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8790                                0x193d, 0xf461)
8791         },
8792         {
8793                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8794                                0x1bd4, 0x0045)
8795         },
8796         {
8797                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8798                                0x1bd4, 0x0046)
8799         },
8800         {
8801                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8802                                0x1bd4, 0x0047)
8803         },
8804         {
8805                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8806                                0x1bd4, 0x0048)
8807         },
8808         {
8809                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8810                                0x1bd4, 0x004a)
8811         },
8812         {
8813                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8814                                0x1bd4, 0x004b)
8815         },
8816         {
8817                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8818                                0x1bd4, 0x004c)
8819         },
8820         {
8821                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8822                                0x1bd4, 0x004f)
8823         },
8824         {
8825                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8826                                0x1bd4, 0x0051)
8827         },
8828         {
8829                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8830                                0x1bd4, 0x0052)
8831         },
8832         {
8833                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8834                                0x1bd4, 0x0053)
8835         },
8836         {
8837                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8838                                0x1bd4, 0x0054)
8839         },
8840         {
8841                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8842                                0x19e5, 0xd227)
8843         },
8844         {
8845                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8846                                0x19e5, 0xd228)
8847         },
8848         {
8849                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8850                                0x19e5, 0xd229)
8851         },
8852         {
8853                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8854                                0x19e5, 0xd22a)
8855         },
8856         {
8857                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8858                                0x19e5, 0xd22b)
8859         },
8860         {
8861                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8862                                0x19e5, 0xd22c)
8863         },
8864         {
8865                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8866                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
8867         },
8868         {
8869                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8870                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
8871         },
8872         {
8873                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8874                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
8875         },
8876         {
8877                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8878                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
8879         },
8880         {
8881                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8882                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
8883         },
8884         {
8885                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8886                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
8887         },
8888         {
8889                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8890                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
8891         },
8892         {
8893                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8894                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
8895         },
8896         {
8897                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8898                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
8899         },
8900         {
8901                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8902                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
8903         },
8904         {
8905                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8906                                PCI_VENDOR_ID_ADAPTEC2, 0x0808)
8907         },
8908         {
8909                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8910                                PCI_VENDOR_ID_ADAPTEC2, 0x0809)
8911         },
8912         {
8913                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8914                                PCI_VENDOR_ID_ADAPTEC2, 0x080a)
8915         },
8916         {
8917                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8918                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
8919         },
8920         {
8921                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8922                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
8923         },
8924         {
8925                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8926                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
8927         },
8928         {
8929                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8930                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
8931         },
8932         {
8933                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8934                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
8935         },
8936         {
8937                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8938                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
8939         },
8940         {
8941                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8942                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
8943         },
8944         {
8945                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8946                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
8947         },
8948         {
8949                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8950                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
8951         },
8952         {
8953                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8954                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
8955         },
8956         {
8957                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8958                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
8959         },
8960         {
8961                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8962                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
8963         },
8964         {
8965                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8966                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
8967         },
8968         {
8969                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8970                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
8971         },
8972         {
8973                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8974                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
8975         },
8976         {
8977                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8978                                PCI_VENDOR_ID_ADAPTEC2, 0x1282)
8979         },
8980         {
8981                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8982                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
8983         },
8984         {
8985                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8986                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
8987         },
8988         {
8989                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8990                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
8991         },
8992         {
8993                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8994                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
8995         },
8996         {
8997                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8998                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
8999         },
9000         {
9001                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9002                                PCI_VENDOR_ID_ADAPTEC2, 0x1400)
9003         },
9004         {
9005                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9006                                PCI_VENDOR_ID_ADAPTEC2, 0x1402)
9007         },
9008         {
9009                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9010                                PCI_VENDOR_ID_ADAPTEC2, 0x1410)
9011         },
9012         {
9013                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9014                                PCI_VENDOR_ID_ADAPTEC2, 0x1411)
9015         },
9016         {
9017                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9018                                PCI_VENDOR_ID_ADAPTEC2, 0x1412)
9019         },
9020         {
9021                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9022                                PCI_VENDOR_ID_ADAPTEC2, 0x1420)
9023         },
9024         {
9025                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9026                                PCI_VENDOR_ID_ADAPTEC2, 0x1430)
9027         },
9028         {
9029                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9030                                PCI_VENDOR_ID_ADAPTEC2, 0x1440)
9031         },
9032         {
9033                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9034                                PCI_VENDOR_ID_ADAPTEC2, 0x1441)
9035         },
9036         {
9037                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9038                                PCI_VENDOR_ID_ADAPTEC2, 0x1450)
9039         },
9040         {
9041                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9042                                PCI_VENDOR_ID_ADAPTEC2, 0x1452)
9043         },
9044         {
9045                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9046                                PCI_VENDOR_ID_ADAPTEC2, 0x1460)
9047         },
9048         {
9049                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9050                                PCI_VENDOR_ID_ADAPTEC2, 0x1461)
9051         },
9052         {
9053                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9054                                PCI_VENDOR_ID_ADAPTEC2, 0x1462)
9055         },
9056         {
9057                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9058                                PCI_VENDOR_ID_ADAPTEC2, 0x1470)
9059         },
9060         {
9061                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9062                                PCI_VENDOR_ID_ADAPTEC2, 0x1471)
9063         },
9064         {
9065                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9066                                PCI_VENDOR_ID_ADAPTEC2, 0x1472)
9067         },
9068         {
9069                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9070                                PCI_VENDOR_ID_ADAPTEC2, 0x1480)
9071         },
9072         {
9073                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9074                                PCI_VENDOR_ID_ADAPTEC2, 0x1490)
9075         },
9076         {
9077                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9078                                PCI_VENDOR_ID_ADAPTEC2, 0x1491)
9079         },
9080         {
9081                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9082                                PCI_VENDOR_ID_ADAPTEC2, 0x14a0)
9083         },
9084         {
9085                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9086                                PCI_VENDOR_ID_ADAPTEC2, 0x14a1)
9087         },
9088         {
9089                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9090                                PCI_VENDOR_ID_ADAPTEC2, 0x14b0)
9091         },
9092         {
9093                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9094                                PCI_VENDOR_ID_ADAPTEC2, 0x14b1)
9095         },
9096         {
9097                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9098                                PCI_VENDOR_ID_ADAPTEC2, 0x14c0)
9099         },
9100         {
9101                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9102                                PCI_VENDOR_ID_ADAPTEC2, 0x14c1)
9103         },
9104         {
9105                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9106                                PCI_VENDOR_ID_ADAPTEC2, 0x14d0)
9107         },
9108         {
9109                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9110                                PCI_VENDOR_ID_ADAPTEC2, 0x14e0)
9111         },
9112         {
9113                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9114                                PCI_VENDOR_ID_ADAPTEC2, 0x14f0)
9115         },
9116         {
9117                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9118                                PCI_VENDOR_ID_ADVANTECH, 0x8312)
9119         },
9120         {
9121                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9122                                PCI_VENDOR_ID_DELL, 0x1fe0)
9123         },
9124         {
9125                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9126                                PCI_VENDOR_ID_HP, 0x0600)
9127         },
9128         {
9129                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9130                                PCI_VENDOR_ID_HP, 0x0601)
9131         },
9132         {
9133                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9134                                PCI_VENDOR_ID_HP, 0x0602)
9135         },
9136         {
9137                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9138                                PCI_VENDOR_ID_HP, 0x0603)
9139         },
9140         {
9141                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9142                                PCI_VENDOR_ID_HP, 0x0609)
9143         },
9144         {
9145                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9146                                PCI_VENDOR_ID_HP, 0x0650)
9147         },
9148         {
9149                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9150                                PCI_VENDOR_ID_HP, 0x0651)
9151         },
9152         {
9153                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9154                                PCI_VENDOR_ID_HP, 0x0652)
9155         },
9156         {
9157                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9158                                PCI_VENDOR_ID_HP, 0x0653)
9159         },
9160         {
9161                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9162                                PCI_VENDOR_ID_HP, 0x0654)
9163         },
9164         {
9165                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9166                                PCI_VENDOR_ID_HP, 0x0655)
9167         },
9168         {
9169                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9170                                PCI_VENDOR_ID_HP, 0x0700)
9171         },
9172         {
9173                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9174                                PCI_VENDOR_ID_HP, 0x0701)
9175         },
9176         {
9177                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9178                                PCI_VENDOR_ID_HP, 0x1001)
9179         },
9180         {
9181                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9182                                PCI_VENDOR_ID_HP, 0x1002)
9183         },
9184         {
9185                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9186                                PCI_VENDOR_ID_HP, 0x1100)
9187         },
9188         {
9189                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9190                                PCI_VENDOR_ID_HP, 0x1101)
9191         },
9192         {
9193                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9194                                0x1590, 0x0294)
9195         },
9196         {
9197                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9198                                0x1590, 0x02db)
9199         },
9200         {
9201                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9202                                0x1590, 0x02dc)
9203         },
9204         {
9205                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9206                                0x1590, 0x032e)
9207         },
9208         {
9209                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9210                                0x1d8d, 0x0800)
9211         },
9212         {
9213                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9214                                0x1d8d, 0x0908)
9215         },
9216         {
9217                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9218                                0x1d8d, 0x0806)
9219         },
9220         {
9221                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9222                                0x1d8d, 0x0916)
9223         },
9224         {
9225                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9226                                PCI_VENDOR_ID_GIGABYTE, 0x1000)
9227         },
9228         {
9229                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9230                                0x1dfc, 0x3161)
9231         },
9232         {
9233                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9234                                0x1cf2, 0x5445)
9235         },
9236         {
9237                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9238                                0x1cf2, 0x5446)
9239         },
9240         {
9241                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9242                                0x1cf2, 0x5447)
9243         },
9244         {
9245                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9246                                0x1cf2, 0x0b27)
9247         },
9248         {
9249                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9250                                0x1cf2, 0x0b29)
9251         },
9252         {
9253                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9254                                0x1cf2, 0x0b45)
9255         },
9256         {
9257                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9258                                PCI_ANY_ID, PCI_ANY_ID)
9259         },
9260         { 0 }
9261 };
9262
9263 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
9264
9265 static struct pci_driver pqi_pci_driver = {
9266         .name = DRIVER_NAME_SHORT,
9267         .id_table = pqi_pci_id_table,
9268         .probe = pqi_pci_probe,
9269         .remove = pqi_pci_remove,
9270         .shutdown = pqi_shutdown,
9271 #if defined(CONFIG_PM)
9272         .suspend = pqi_suspend,
9273         .resume = pqi_resume,
9274 #endif
9275 };
9276
9277 static int __init pqi_init(void)
9278 {
9279         int rc;
9280
9281         pr_info(DRIVER_NAME "\n");
9282
9283         pqi_sas_transport_template = sas_attach_transport(&pqi_sas_transport_functions);
9284         if (!pqi_sas_transport_template)
9285                 return -ENODEV;
9286
9287         pqi_process_module_params();
9288
9289         rc = pci_register_driver(&pqi_pci_driver);
9290         if (rc)
9291                 sas_release_transport(pqi_sas_transport_template);
9292
9293         return rc;
9294 }
9295
9296 static void __exit pqi_cleanup(void)
9297 {
9298         pci_unregister_driver(&pqi_pci_driver);
9299         sas_release_transport(pqi_sas_transport_template);
9300 }
9301
9302 module_init(pqi_init);
9303 module_exit(pqi_cleanup);
9304
9305 static void __attribute__((unused)) verify_structures(void)
9306 {
9307         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9308                 sis_host_to_ctrl_doorbell) != 0x20);
9309         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9310                 sis_interrupt_mask) != 0x34);
9311         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9312                 sis_ctrl_to_host_doorbell) != 0x9c);
9313         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9314                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
9315         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9316                 sis_driver_scratch) != 0xb0);
9317         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9318                 sis_product_identifier) != 0xb4);
9319         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9320                 sis_firmware_status) != 0xbc);
9321         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9322                 sis_mailbox) != 0x1000);
9323         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9324                 pqi_registers) != 0x4000);
9325
9326         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
9327                 iu_type) != 0x0);
9328         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
9329                 iu_length) != 0x2);
9330         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
9331                 response_queue_id) != 0x4);
9332         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
9333                 driver_flags) != 0x6);
9334         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
9335
9336         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9337                 status) != 0x0);
9338         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9339                 service_response) != 0x1);
9340         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9341                 data_present) != 0x2);
9342         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9343                 reserved) != 0x3);
9344         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9345                 residual_count) != 0x4);
9346         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9347                 data_length) != 0x8);
9348         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9349                 reserved1) != 0xa);
9350         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9351                 data) != 0xc);
9352         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
9353
9354         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9355                 data_in_result) != 0x0);
9356         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9357                 data_out_result) != 0x1);
9358         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9359                 reserved) != 0x2);
9360         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9361                 status) != 0x5);
9362         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9363                 status_qualifier) != 0x6);
9364         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9365                 sense_data_length) != 0x8);
9366         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9367                 response_data_length) != 0xa);
9368         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9369                 data_in_transferred) != 0xc);
9370         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9371                 data_out_transferred) != 0x10);
9372         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9373                 data) != 0x14);
9374         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
9375
9376         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9377                 signature) != 0x0);
9378         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9379                 function_and_status_code) != 0x8);
9380         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9381                 max_admin_iq_elements) != 0x10);
9382         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9383                 max_admin_oq_elements) != 0x11);
9384         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9385                 admin_iq_element_length) != 0x12);
9386         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9387                 admin_oq_element_length) != 0x13);
9388         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9389                 max_reset_timeout) != 0x14);
9390         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9391                 legacy_intx_status) != 0x18);
9392         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9393                 legacy_intx_mask_set) != 0x1c);
9394         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9395                 legacy_intx_mask_clear) != 0x20);
9396         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9397                 device_status) != 0x40);
9398         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9399                 admin_iq_pi_offset) != 0x48);
9400         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9401                 admin_oq_ci_offset) != 0x50);
9402         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9403                 admin_iq_element_array_addr) != 0x58);
9404         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9405                 admin_oq_element_array_addr) != 0x60);
9406         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9407                 admin_iq_ci_addr) != 0x68);
9408         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9409                 admin_oq_pi_addr) != 0x70);
9410         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9411                 admin_iq_num_elements) != 0x78);
9412         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9413                 admin_oq_num_elements) != 0x79);
9414         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9415                 admin_queue_int_msg_num) != 0x7a);
9416         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9417                 device_error) != 0x80);
9418         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9419                 error_details) != 0x88);
9420         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9421                 device_reset) != 0x90);
9422         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9423                 power_action) != 0x94);
9424         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
9425
9426         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9427                 header.iu_type) != 0);
9428         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9429                 header.iu_length) != 2);
9430         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9431                 header.driver_flags) != 6);
9432         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9433                 request_id) != 8);
9434         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9435                 function_code) != 10);
9436         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9437                 data.report_device_capability.buffer_length) != 44);
9438         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9439                 data.report_device_capability.sg_descriptor) != 48);
9440         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9441                 data.create_operational_iq.queue_id) != 12);
9442         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9443                 data.create_operational_iq.element_array_addr) != 16);
9444         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9445                 data.create_operational_iq.ci_addr) != 24);
9446         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9447                 data.create_operational_iq.num_elements) != 32);
9448         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9449                 data.create_operational_iq.element_length) != 34);
9450         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9451                 data.create_operational_iq.queue_protocol) != 36);
9452         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9453                 data.create_operational_oq.queue_id) != 12);
9454         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9455                 data.create_operational_oq.element_array_addr) != 16);
9456         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9457                 data.create_operational_oq.pi_addr) != 24);
9458         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9459                 data.create_operational_oq.num_elements) != 32);
9460         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9461                 data.create_operational_oq.element_length) != 34);
9462         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9463                 data.create_operational_oq.queue_protocol) != 36);
9464         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9465                 data.create_operational_oq.int_msg_num) != 40);
9466         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9467                 data.create_operational_oq.coalescing_count) != 42);
9468         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9469                 data.create_operational_oq.min_coalescing_time) != 44);
9470         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9471                 data.create_operational_oq.max_coalescing_time) != 48);
9472         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9473                 data.delete_operational_queue.queue_id) != 12);
9474         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
9475         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
9476                 data.create_operational_iq) != 64 - 11);
9477         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
9478                 data.create_operational_oq) != 64 - 11);
9479         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
9480                 data.delete_operational_queue) != 64 - 11);
9481
9482         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9483                 header.iu_type) != 0);
9484         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9485                 header.iu_length) != 2);
9486         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9487                 header.driver_flags) != 6);
9488         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9489                 request_id) != 8);
9490         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9491                 function_code) != 10);
9492         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9493                 status) != 11);
9494         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9495                 data.create_operational_iq.status_descriptor) != 12);
9496         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9497                 data.create_operational_iq.iq_pi_offset) != 16);
9498         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9499                 data.create_operational_oq.status_descriptor) != 12);
9500         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9501                 data.create_operational_oq.oq_ci_offset) != 16);
9502         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
9503
9504         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9505                 header.iu_type) != 0);
9506         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9507                 header.iu_length) != 2);
9508         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9509                 header.response_queue_id) != 4);
9510         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9511                 header.driver_flags) != 6);
9512         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9513                 request_id) != 8);
9514         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9515                 nexus_id) != 10);
9516         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9517                 buffer_length) != 12);
9518         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9519                 lun_number) != 16);
9520         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9521                 protocol_specific) != 24);
9522         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9523                 error_index) != 27);
9524         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9525                 cdb) != 32);
9526         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9527                 timeout) != 60);
9528         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9529                 sg_descriptors) != 64);
9530         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
9531                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
9532
9533         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9534                 header.iu_type) != 0);
9535         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9536                 header.iu_length) != 2);
9537         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9538                 header.response_queue_id) != 4);
9539         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9540                 header.driver_flags) != 6);
9541         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9542                 request_id) != 8);
9543         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9544                 nexus_id) != 12);
9545         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9546                 buffer_length) != 16);
9547         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9548                 data_encryption_key_index) != 22);
9549         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9550                 encrypt_tweak_lower) != 24);
9551         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9552                 encrypt_tweak_upper) != 28);
9553         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9554                 cdb) != 32);
9555         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9556                 error_index) != 48);
9557         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9558                 num_sg_descriptors) != 50);
9559         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9560                 cdb_length) != 51);
9561         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9562                 lun_number) != 52);
9563         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9564                 sg_descriptors) != 64);
9565         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
9566                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
9567
9568         BUILD_BUG_ON(offsetof(struct pqi_io_response,
9569                 header.iu_type) != 0);
9570         BUILD_BUG_ON(offsetof(struct pqi_io_response,
9571                 header.iu_length) != 2);
9572         BUILD_BUG_ON(offsetof(struct pqi_io_response,
9573                 request_id) != 8);
9574         BUILD_BUG_ON(offsetof(struct pqi_io_response,
9575                 error_index) != 10);
9576
9577         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9578                 header.iu_type) != 0);
9579         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9580                 header.iu_length) != 2);
9581         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9582                 header.response_queue_id) != 4);
9583         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9584                 request_id) != 8);
9585         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9586                 data.report_event_configuration.buffer_length) != 12);
9587         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9588                 data.report_event_configuration.sg_descriptors) != 16);
9589         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9590                 data.set_event_configuration.global_event_oq_id) != 10);
9591         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9592                 data.set_event_configuration.buffer_length) != 12);
9593         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9594                 data.set_event_configuration.sg_descriptors) != 16);
9595
9596         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
9597                 max_inbound_iu_length) != 6);
9598         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
9599                 max_outbound_iu_length) != 14);
9600         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
9601
9602         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9603                 data_length) != 0);
9604         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9605                 iq_arbitration_priority_support_bitmask) != 8);
9606         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9607                 maximum_aw_a) != 9);
9608         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9609                 maximum_aw_b) != 10);
9610         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9611                 maximum_aw_c) != 11);
9612         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9613                 max_inbound_queues) != 16);
9614         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9615                 max_elements_per_iq) != 18);
9616         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9617                 max_iq_element_length) != 24);
9618         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9619                 min_iq_element_length) != 26);
9620         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9621                 max_outbound_queues) != 30);
9622         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9623                 max_elements_per_oq) != 32);
9624         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9625                 intr_coalescing_time_granularity) != 34);
9626         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9627                 max_oq_element_length) != 36);
9628         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9629                 min_oq_element_length) != 38);
9630         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9631                 iu_layer_descriptors) != 64);
9632         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
9633
9634         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
9635                 event_type) != 0);
9636         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
9637                 oq_id) != 2);
9638         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
9639
9640         BUILD_BUG_ON(offsetof(struct pqi_event_config,
9641                 num_event_descriptors) != 2);
9642         BUILD_BUG_ON(offsetof(struct pqi_event_config,
9643                 descriptors) != 4);
9644
9645         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
9646                 ARRAY_SIZE(pqi_supported_event_types));
9647
9648         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9649                 header.iu_type) != 0);
9650         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9651                 header.iu_length) != 2);
9652         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9653                 event_type) != 8);
9654         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9655                 event_id) != 10);
9656         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9657                 additional_event_id) != 12);
9658         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9659                 data) != 16);
9660         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
9661
9662         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
9663                 header.iu_type) != 0);
9664         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
9665                 header.iu_length) != 2);
9666         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
9667                 event_type) != 8);
9668         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
9669                 event_id) != 10);
9670         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
9671                 additional_event_id) != 12);
9672         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
9673
9674         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9675                 header.iu_type) != 0);
9676         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9677                 header.iu_length) != 2);
9678         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9679                 request_id) != 8);
9680         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9681                 nexus_id) != 10);
9682         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9683                 timeout) != 14);
9684         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9685                 lun_number) != 16);
9686         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9687                 protocol_specific) != 24);
9688         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9689                 outbound_queue_id_to_manage) != 26);
9690         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9691                 request_id_to_manage) != 28);
9692         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9693                 task_management_function) != 30);
9694         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
9695
9696         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9697                 header.iu_type) != 0);
9698         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9699                 header.iu_length) != 2);
9700         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9701                 request_id) != 8);
9702         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9703                 nexus_id) != 10);
9704         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9705                 additional_response_info) != 12);
9706         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9707                 response_code) != 15);
9708         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
9709
9710         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9711                 configured_logical_drive_count) != 0);
9712         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9713                 configuration_signature) != 1);
9714         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9715                 firmware_version_short) != 5);
9716         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9717                 extended_logical_unit_count) != 154);
9718         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9719                 firmware_build_number) != 190);
9720         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9721                 vendor_id) != 200);
9722         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9723                 product_id) != 208);
9724         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9725                 extra_controller_flags) != 286);
9726         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9727                 controller_mode) != 292);
9728         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9729                 spare_part_number) != 293);
9730         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9731                 firmware_version_long) != 325);
9732
9733         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9734                 phys_bay_in_box) != 115);
9735         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9736                 device_type) != 120);
9737         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9738                 redundant_path_present_map) != 1736);
9739         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9740                 active_path_number) != 1738);
9741         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9742                 alternate_paths_phys_connector) != 1739);
9743         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9744                 alternate_paths_phys_box_on_port) != 1755);
9745         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9746                 current_queue_depth_limit) != 1796);
9747         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
9748
9749         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_buffer_header) != 4);
9750         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
9751                 page_code) != 0);
9752         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
9753                 subpage_code) != 1);
9754         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
9755                 buffer_length) != 2);
9756
9757         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_page_header) != 4);
9758         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
9759                 page_code) != 0);
9760         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
9761                 subpage_code) != 1);
9762         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
9763                 page_length) != 2);
9764
9765         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_io_page_aio_subpage)
9766                 != 18);
9767         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9768                 header) != 0);
9769         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9770                 firmware_read_support) != 4);
9771         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9772                 driver_read_support) != 5);
9773         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9774                 firmware_write_support) != 6);
9775         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9776                 driver_write_support) != 7);
9777         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9778                 max_transfer_encrypted_sas_sata) != 8);
9779         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9780                 max_transfer_encrypted_nvme) != 10);
9781         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9782                 max_write_raid_5_6) != 12);
9783         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9784                 max_write_raid_1_10_2drive) != 14);
9785         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9786                 max_write_raid_1_10_3drive) != 16);
9787
9788         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
9789         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
9790         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
9791                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
9792         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
9793                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
9794         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
9795         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
9796                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
9797         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
9798         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
9799                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
9800
9801         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
9802         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
9803                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
9804 }