drivers/scsi/smartpqi/smartpqi_init.c

   1 /*
   2  *    driver for Microsemi PQI-based storage controllers
   3  *    Copyright (c) 2016-2017 Microsemi Corporation
   4  *    Copyright (c) 2016 PMC-Sierra, Inc.
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; version 2 of the License.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  14  *
  15  *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
  16  *
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/pci.h>
  22 #include <linux/delay.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/sched.h>
  25 #include <linux/rtc.h>
  26 #include <linux/bcd.h>
  27 #include <linux/reboot.h>
  28 #include <linux/cciss_ioctl.h>
  29 #include <linux/blk-mq-pci.h>
  30 #include <scsi/scsi_host.h>
  31 #include <scsi/scsi_cmnd.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_transport_sas.h>
  35 #include <asm/unaligned.h>
  36 #include "smartpqi.h"
  37 #include "smartpqi_sis.h"
  38
  39 #if !defined(BUILD_TIMESTAMP)
  40 #define BUILD_TIMESTAMP
  41 #endif
  42
  43 #define DRIVER_VERSION          "1.1.2-125"
  44 #define DRIVER_MAJOR            1
  45 #define DRIVER_MINOR            1
  46 #define DRIVER_RELEASE          2
  47 #define DRIVER_REVISION         125
  48
  49 #define DRIVER_NAME             "Microsemi PQI Driver (v" \
  50                                 DRIVER_VERSION BUILD_TIMESTAMP ")"
  51 #define DRIVER_NAME_SHORT       "smartpqi"
  52
  53 #define PQI_EXTRA_SGL_MEMORY    (12 * sizeof(struct pqi_sg_descriptor))
  54
  55 MODULE_AUTHOR("Microsemi");
  56 MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
  57         DRIVER_VERSION);
  58 MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
  59 MODULE_VERSION(DRIVER_VERSION);
  60 MODULE_LICENSE("GPL");
  61
  62 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
  63 static void pqi_ctrl_offline_worker(struct work_struct *work);
  64 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info);
  65 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  66 static void pqi_scan_start(struct Scsi_Host *shost);
  67 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  68         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  69         struct pqi_io_request *io_request);
  70 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  71         struct pqi_iu_header *request, unsigned int flags,
  72         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs);
  73 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  74         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  75         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  76         struct pqi_encryption_info *encryption_info, bool raid_bypass);
  77
  78 /* for flags argument to pqi_submit_raid_request_synchronous() */
  79 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
  80
  81 static struct scsi_transport_template *pqi_sas_transport_template;
  82
  83 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  84
  85 enum pqi_lockup_action {
  86         NONE,
  87         REBOOT,
  88         PANIC
  89 };
  90
  91 static enum pqi_lockup_action pqi_lockup_action = NONE;
  92
  93 static struct {
  94         enum pqi_lockup_action  action;
  95         char                    *name;
  96 } pqi_lockup_actions[] = {
  97         {
  98                 .action = NONE,
  99                 .name = "none",
 100         },
 101         {
 102                 .action = REBOOT,
 103                 .name = "reboot",
 104         },
 105         {
 106                 .action = PANIC,
 107                 .name = "panic",
 108         },
 109 };
 110
 111 static unsigned int pqi_supported_event_types[] = {
 112         PQI_EVENT_TYPE_HOTPLUG,
 113         PQI_EVENT_TYPE_HARDWARE,
 114         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 115         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 116         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 117         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 118 };
 119
 120 static int pqi_disable_device_id_wildcards;
 121 module_param_named(disable_device_id_wildcards,
 122         pqi_disable_device_id_wildcards, int, 0644);
 123 MODULE_PARM_DESC(disable_device_id_wildcards,
 124         "Disable device ID wildcards.");
 125
 126 static int pqi_disable_heartbeat;
 127 module_param_named(disable_heartbeat,
 128         pqi_disable_heartbeat, int, 0644);
 129 MODULE_PARM_DESC(disable_heartbeat,
 130         "Disable heartbeat.");
 131
 132 static int pqi_disable_ctrl_shutdown;
 133 module_param_named(disable_ctrl_shutdown,
 134         pqi_disable_ctrl_shutdown, int, 0644);
 135 MODULE_PARM_DESC(disable_ctrl_shutdown,
 136         "Disable controller shutdown when controller locked up.");
 137
 138 static char *pqi_lockup_action_param;
 139 module_param_named(lockup_action,
 140         pqi_lockup_action_param, charp, 0644);
 141 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 142         "\t\tSupported: none, reboot, panic\n"
 143         "\t\tDefault: none");
 144
 145 static char *raid_levels[] = {
 146         "RAID-0",
 147         "RAID-4",
 148         "RAID-1(1+0)",
 149         "RAID-5",
 150         "RAID-5+1",
 151         "RAID-ADG",
 152         "RAID-1(ADM)",
 153 };
 154
 155 static char *pqi_raid_level_to_string(u8 raid_level)
 156 {
 157         if (raid_level < ARRAY_SIZE(raid_levels))
 158                 return raid_levels[raid_level];
 159
 160         return "RAID UNKNOWN";
 161 }
 162
 163 #define SA_RAID_0               0
 164 #define SA_RAID_4               1
 165 #define SA_RAID_1               2       /* also used for RAID 10 */
 166 #define SA_RAID_5               3       /* also used for RAID 50 */
 167 #define SA_RAID_51              4
 168 #define SA_RAID_6               5       /* also used for RAID 60 */
 169 #define SA_RAID_ADM             6       /* also used for RAID 1+0 ADM */
 170 #define SA_RAID_MAX             SA_RAID_ADM
 171 #define SA_RAID_UNKNOWN         0xff
 172
 173 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 174 {
 175         pqi_prep_for_scsi_done(scmd);
 176         scmd->scsi_done(scmd);
 177 }
 178
 179 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 180 {
 181         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 182 }
 183
 184 static inline struct pqi_ctrl_info *shost_to_hba(struct Scsi_Host *shost)
 185 {
 186         void *hostdata = shost_priv(shost);
 187
 188         return *((struct pqi_ctrl_info **)hostdata);
 189 }
 190
 191 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 192 {
 193         return !device->is_physical_device;
 194 }
 195
 196 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 197 {
 198         return scsi3addr[2] != 0;
 199 }
 200
 201 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 202 {
 203         return !ctrl_info->controller_online;
 204 }
 205
 206 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 207 {
 208         if (ctrl_info->controller_online)
 209                 if (!sis_is_firmware_running(ctrl_info))
 210                         pqi_take_ctrl_offline(ctrl_info);
 211 }
 212
 213 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 214 {
 215         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 216 }
 217
 218 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(
 219         struct pqi_ctrl_info *ctrl_info)
 220 {
 221         return sis_read_driver_scratch(ctrl_info);
 222 }
 223
 224 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 225         enum pqi_ctrl_mode mode)
 226 {
 227         sis_write_driver_scratch(ctrl_info, mode);
 228 }
 229
 230 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 231 {
 232         ctrl_info->block_requests = true;
 233         scsi_block_requests(ctrl_info->scsi_host);
 234 }
 235
 236 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 237 {
 238         ctrl_info->block_requests = false;
 239         wake_up_all(&ctrl_info->block_requests_wait);
 240         pqi_retry_raid_bypass_requests(ctrl_info);
 241         scsi_unblock_requests(ctrl_info->scsi_host);
 242 }
 243
 244 static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 245 {
 246         return ctrl_info->block_requests;
 247 }
 248
 249 static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info,
 250         unsigned long timeout_msecs)
 251 {
 252         unsigned long remaining_msecs;
 253
 254         if (!pqi_ctrl_blocked(ctrl_info))
 255                 return timeout_msecs;
 256
 257         atomic_inc(&ctrl_info->num_blocked_threads);
 258
 259         if (timeout_msecs == NO_TIMEOUT) {
 260                 wait_event(ctrl_info->block_requests_wait,
 261                         !pqi_ctrl_blocked(ctrl_info));
 262                 remaining_msecs = timeout_msecs;
 263         } else {
 264                 unsigned long remaining_jiffies;
 265
 266                 remaining_jiffies =
 267                         wait_event_timeout(ctrl_info->block_requests_wait,
 268                                 !pqi_ctrl_blocked(ctrl_info),
 269                                 msecs_to_jiffies(timeout_msecs));
 270                 remaining_msecs = jiffies_to_msecs(remaining_jiffies);
 271         }
 272
 273         atomic_dec(&ctrl_info->num_blocked_threads);
 274
 275         return remaining_msecs;
 276 }
 277
 278 static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
 279 {
 280         atomic_inc(&ctrl_info->num_busy_threads);
 281 }
 282
 283 static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
 284 {
 285         atomic_dec(&ctrl_info->num_busy_threads);
 286 }
 287
 288 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 289 {
 290         while (atomic_read(&ctrl_info->num_busy_threads) >
 291                 atomic_read(&ctrl_info->num_blocked_threads))
 292                 usleep_range(1000, 2000);
 293 }
 294
 295 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 296 {
 297         return device->device_offline;
 298 }
 299
 300 static inline void pqi_device_reset_start(struct pqi_scsi_dev *device)
 301 {
 302         device->in_reset = true;
 303 }
 304
 305 static inline void pqi_device_reset_done(struct pqi_scsi_dev *device)
 306 {
 307         device->in_reset = false;
 308 }
 309
 310 static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device)
 311 {
 312         return device->in_reset;
 313 }
 314
 315 static inline void pqi_schedule_rescan_worker_with_delay(
 316         struct pqi_ctrl_info *ctrl_info, unsigned long delay)
 317 {
 318         if (pqi_ctrl_offline(ctrl_info))
 319                 return;
 320
 321         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 322 }
 323
 324 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 325 {
 326         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 327 }
 328
 329 #define PQI_RESCAN_WORK_DELAY  (10 * HZ)
 330
 331 static inline void pqi_schedule_rescan_worker_delayed(
 332         struct pqi_ctrl_info *ctrl_info)
 333 {
 334         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 335 }
 336
 337 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 338 {
 339         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 340 }
 341
 342 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 343 {
 344         if (!ctrl_info->heartbeat_counter)
 345                 return 0;
 346
 347         return readl(ctrl_info->heartbeat_counter);
 348 }
 349
 350 static int pqi_map_single(struct pci_dev *pci_dev,
 351         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 352         size_t buffer_length, int data_direction)
 353 {
 354         dma_addr_t bus_address;
 355
 356         if (!buffer || buffer_length == 0 || data_direction == PCI_DMA_NONE)
 357                 return 0;
 358
 359         bus_address = pci_map_single(pci_dev, buffer, buffer_length,
 360                 data_direction);
 361         if (pci_dma_mapping_error(pci_dev, bus_address))
 362                 return -ENOMEM;
 363
 364         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 365         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 366         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 367
 368         return 0;
 369 }
 370
 371 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 372         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 373         int data_direction)
 374 {
 375         int i;
 376
 377         if (data_direction == PCI_DMA_NONE)
 378                 return;
 379
 380         for (i = 0; i < num_descriptors; i++)
 381                 pci_unmap_single(pci_dev,
 382                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 383                         get_unaligned_le32(&descriptors[i].length),
 384                         data_direction);
 385 }
 386
 387 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 388         struct pqi_raid_path_request *request, u8 cmd,
 389         u8 *scsi3addr, void *buffer, size_t buffer_length,
 390         u16 vpd_page, int *pci_direction)
 391 {
 392         u8 *cdb;
 393         int pci_dir;
 394
 395         memset(request, 0, sizeof(*request));
 396
 397         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 398         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 399                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 400                 &request->header.iu_length);
 401         put_unaligned_le32(buffer_length, &request->buffer_length);
 402         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 403         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 404         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 405
 406         cdb = request->cdb;
 407
 408         switch (cmd) {
 409         case INQUIRY:
 410                 request->data_direction = SOP_READ_FLAG;
 411                 cdb[0] = INQUIRY;
 412                 if (vpd_page & VPD_PAGE) {
 413                         cdb[1] = 0x1;
 414                         cdb[2] = (u8)vpd_page;
 415                 }
 416                 cdb[4] = (u8)buffer_length;
 417                 break;
 418         case CISS_REPORT_LOG:
 419         case CISS_REPORT_PHYS:
 420                 request->data_direction = SOP_READ_FLAG;
 421                 cdb[0] = cmd;
 422                 if (cmd == CISS_REPORT_PHYS)
 423                         cdb[1] = CISS_REPORT_PHYS_EXTENDED;
 424                 else
 425                         cdb[1] = CISS_REPORT_LOG_EXTENDED;
 426                 put_unaligned_be32(buffer_length, &cdb[6]);
 427                 break;
 428         case CISS_GET_RAID_MAP:
 429                 request->data_direction = SOP_READ_FLAG;
 430                 cdb[0] = CISS_READ;
 431                 cdb[1] = CISS_GET_RAID_MAP;
 432                 put_unaligned_be32(buffer_length, &cdb[6]);
 433                 break;
 434         case SA_FLUSH_CACHE:
 435                 request->data_direction = SOP_WRITE_FLAG;
 436                 cdb[0] = BMIC_WRITE;
 437                 cdb[6] = BMIC_FLUSH_CACHE;
 438                 put_unaligned_be16(buffer_length, &cdb[7]);
 439                 break;
 440         case BMIC_IDENTIFY_CONTROLLER:
 441         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 442                 request->data_direction = SOP_READ_FLAG;
 443                 cdb[0] = BMIC_READ;
 444                 cdb[6] = cmd;
 445                 put_unaligned_be16(buffer_length, &cdb[7]);
 446                 break;
 447         case BMIC_WRITE_HOST_WELLNESS:
 448                 request->data_direction = SOP_WRITE_FLAG;
 449                 cdb[0] = BMIC_WRITE;
 450                 cdb[6] = cmd;
 451                 put_unaligned_be16(buffer_length, &cdb[7]);
 452                 break;
 453         default:
 454                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n",
 455                         cmd);
 456                 break;
 457         }
 458
 459         switch (request->data_direction) {
 460         case SOP_READ_FLAG:
 461                 pci_dir = PCI_DMA_FROMDEVICE;
 462                 break;
 463         case SOP_WRITE_FLAG:
 464                 pci_dir = PCI_DMA_TODEVICE;
 465                 break;
 466         case SOP_NO_DIRECTION_FLAG:
 467                 pci_dir = PCI_DMA_NONE;
 468                 break;
 469         default:
 470                 pci_dir = PCI_DMA_BIDIRECTIONAL;
 471                 break;
 472         }
 473
 474         *pci_direction = pci_dir;
 475
 476         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 477                 buffer, buffer_length, pci_dir);
 478 }
 479
 480 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 481 {
 482         io_request->scmd = NULL;
 483         io_request->status = 0;
 484         io_request->error_info = NULL;
 485         io_request->raid_bypass = false;
 486 }
 487
 488 static struct pqi_io_request *pqi_alloc_io_request(
 489         struct pqi_ctrl_info *ctrl_info)
 490 {
 491         struct pqi_io_request *io_request;
 492         u16 i = ctrl_info->next_io_request_slot;        /* benignly racy */
 493
 494         while (1) {
 495                 io_request = &ctrl_info->io_request_pool[i];
 496                 if (atomic_inc_return(&io_request->refcount) == 1)
 497                         break;
 498                 atomic_dec(&io_request->refcount);
 499                 i = (i + 1) % ctrl_info->max_io_slots;
 500         }
 501
 502         /* benignly racy */
 503         ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 504
 505         pqi_reinit_io_request(io_request);
 506
 507         return io_request;
 508 }
 509
 510 static void pqi_free_io_request(struct pqi_io_request *io_request)
 511 {
 512         atomic_dec(&io_request->refcount);
 513 }
 514
 515 static int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 516         struct bmic_identify_controller *buffer)
 517 {
 518         int rc;
 519         int pci_direction;
 520         struct pqi_raid_path_request request;
 521
 522         rc = pqi_build_raid_path_request(ctrl_info, &request,
 523                 BMIC_IDENTIFY_CONTROLLER, RAID_CTLR_LUNID, buffer,
 524                 sizeof(*buffer), 0, &pci_direction);
 525         if (rc)
 526                 return rc;
 527
 528         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 529                 NULL, NO_TIMEOUT);
 530
 531         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 532                 pci_direction);
 533
 534         return rc;
 535 }
 536
 537 static int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 538         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 539 {
 540         int rc;
 541         int pci_direction;
 542         struct pqi_raid_path_request request;
 543
 544         rc = pqi_build_raid_path_request(ctrl_info, &request,
 545                 INQUIRY, scsi3addr, buffer, buffer_length, vpd_page,
 546                 &pci_direction);
 547         if (rc)
 548                 return rc;
 549
 550         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 551                 NULL, NO_TIMEOUT);
 552
 553         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 554                 pci_direction);
 555
 556         return rc;
 557 }
 558
 559 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 560         struct pqi_scsi_dev *device,
 561         struct bmic_identify_physical_device *buffer,
 562         size_t buffer_length)
 563 {
 564         int rc;
 565         int pci_direction;
 566         u16 bmic_device_index;
 567         struct pqi_raid_path_request request;
 568
 569         rc = pqi_build_raid_path_request(ctrl_info, &request,
 570                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 571                 buffer_length, 0, &pci_direction);
 572         if (rc)
 573                 return rc;
 574
 575         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 576         request.cdb[2] = (u8)bmic_device_index;
 577         request.cdb[9] = (u8)(bmic_device_index >> 8);
 578
 579         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 580                 0, NULL, NO_TIMEOUT);
 581
 582         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 583                 pci_direction);
 584
 585         return rc;
 586 }
 587
 588 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 589         enum bmic_flush_cache_shutdown_event shutdown_event)
 590 {
 591         int rc;
 592         struct pqi_raid_path_request request;
 593         int pci_direction;
 594         struct bmic_flush_cache *flush_cache;
 595
 596         /*
 597          * Don't bother trying to flush the cache if the controller is
 598          * locked up.
 599          */
 600         if (pqi_ctrl_offline(ctrl_info))
 601                 return -ENXIO;
 602
 603         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 604         if (!flush_cache)
 605                 return -ENOMEM;
 606
 607         flush_cache->shutdown_event = shutdown_event;
 608
 609         rc = pqi_build_raid_path_request(ctrl_info, &request,
 610                 SA_FLUSH_CACHE, RAID_CTLR_LUNID, flush_cache,
 611                 sizeof(*flush_cache), 0, &pci_direction);
 612         if (rc)
 613                 goto out;
 614
 615         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 616                 0, NULL, NO_TIMEOUT);
 617
 618         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 619                 pci_direction);
 620
 621 out:
 622         kfree(flush_cache);
 623
 624         return rc;
 625 }
 626
 627 static int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 628         void *buffer, size_t buffer_length)
 629 {
 630         int rc;
 631         struct pqi_raid_path_request request;
 632         int pci_direction;
 633
 634         rc = pqi_build_raid_path_request(ctrl_info, &request,
 635                 BMIC_WRITE_HOST_WELLNESS, RAID_CTLR_LUNID, buffer,
 636                 buffer_length, 0, &pci_direction);
 637         if (rc)
 638                 return rc;
 639
 640         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 641                 0, NULL, NO_TIMEOUT);
 642
 643         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 644                 pci_direction);
 645
 646         return rc;
 647 }
 648
 649 #pragma pack(1)
 650
 651 struct bmic_host_wellness_driver_version {
 652         u8      start_tag[4];
 653         u8      driver_version_tag[2];
 654         __le16  driver_version_length;
 655         char    driver_version[32];
 656         u8      dont_write_tag[2];
 657         u8      end_tag[2];
 658 };
 659
 660 #pragma pack()
 661
 662 static int pqi_write_driver_version_to_host_wellness(
 663         struct pqi_ctrl_info *ctrl_info)
 664 {
 665         int rc;
 666         struct bmic_host_wellness_driver_version *buffer;
 667         size_t buffer_length;
 668
 669         buffer_length = sizeof(*buffer);
 670
 671         buffer = kmalloc(buffer_length, GFP_KERNEL);
 672         if (!buffer)
 673                 return -ENOMEM;
 674
 675         buffer->start_tag[0] = '<';
 676         buffer->start_tag[1] = 'H';
 677         buffer->start_tag[2] = 'W';
 678         buffer->start_tag[3] = '>';
 679         buffer->driver_version_tag[0] = 'D';
 680         buffer->driver_version_tag[1] = 'V';
 681         put_unaligned_le16(sizeof(buffer->driver_version),
 682                 &buffer->driver_version_length);
 683         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 684                 sizeof(buffer->driver_version) - 1);
 685         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 686         buffer->dont_write_tag[0] = 'D';
 687         buffer->dont_write_tag[1] = 'W';
 688         buffer->end_tag[0] = 'Z';
 689         buffer->end_tag[1] = 'Z';
 690
 691         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 692
 693         kfree(buffer);
 694
 695         return rc;
 696 }
 697
 698 #pragma pack(1)
 699
 700 struct bmic_host_wellness_time {
 701         u8      start_tag[4];
 702         u8      time_tag[2];
 703         __le16  time_length;
 704         u8      time[8];
 705         u8      dont_write_tag[2];
 706         u8      end_tag[2];
 707 };
 708
 709 #pragma pack()
 710
 711 static int pqi_write_current_time_to_host_wellness(
 712         struct pqi_ctrl_info *ctrl_info)
 713 {
 714         int rc;
 715         struct bmic_host_wellness_time *buffer;
 716         size_t buffer_length;
 717         time64_t local_time;
 718         unsigned int year;
 719         struct tm tm;
 720
 721         buffer_length = sizeof(*buffer);
 722
 723         buffer = kmalloc(buffer_length, GFP_KERNEL);
 724         if (!buffer)
 725                 return -ENOMEM;
 726
 727         buffer->start_tag[0] = '<';
 728         buffer->start_tag[1] = 'H';
 729         buffer->start_tag[2] = 'W';
 730         buffer->start_tag[3] = '>';
 731         buffer->time_tag[0] = 'T';
 732         buffer->time_tag[1] = 'D';
 733         put_unaligned_le16(sizeof(buffer->time),
 734                 &buffer->time_length);
 735
 736         local_time = ktime_get_real_seconds();
 737         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
 738         year = tm.tm_year + 1900;
 739
 740         buffer->time[0] = bin2bcd(tm.tm_hour);
 741         buffer->time[1] = bin2bcd(tm.tm_min);
 742         buffer->time[2] = bin2bcd(tm.tm_sec);
 743         buffer->time[3] = 0;
 744         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
 745         buffer->time[5] = bin2bcd(tm.tm_mday);
 746         buffer->time[6] = bin2bcd(year / 100);
 747         buffer->time[7] = bin2bcd(year % 100);
 748
 749         buffer->dont_write_tag[0] = 'D';
 750         buffer->dont_write_tag[1] = 'W';
 751         buffer->end_tag[0] = 'Z';
 752         buffer->end_tag[1] = 'Z';
 753
 754         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 755
 756         kfree(buffer);
 757
 758         return rc;
 759 }
 760
 761 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * HZ)
 762
 763 static void pqi_update_time_worker(struct work_struct *work)
 764 {
 765         int rc;
 766         struct pqi_ctrl_info *ctrl_info;
 767
 768         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
 769                 update_time_work);
 770
 771         if (pqi_ctrl_offline(ctrl_info))
 772                 return;
 773
 774         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
 775         if (rc)
 776                 dev_warn(&ctrl_info->pci_dev->dev,
 777                         "error updating time on controller\n");
 778
 779         schedule_delayed_work(&ctrl_info->update_time_work,
 780                 PQI_UPDATE_TIME_WORK_INTERVAL);
 781 }
 782
 783 static inline void pqi_schedule_update_time_worker(
 784         struct pqi_ctrl_info *ctrl_info)
 785 {
 786         schedule_delayed_work(&ctrl_info->update_time_work, 0);
 787 }
 788
 789 static inline void pqi_cancel_update_time_worker(
 790         struct pqi_ctrl_info *ctrl_info)
 791 {
 792         cancel_delayed_work_sync(&ctrl_info->update_time_work);
 793 }
 794
 795 static int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 796         void *buffer, size_t buffer_length)
 797 {
 798         int rc;
 799         int pci_direction;
 800         struct pqi_raid_path_request request;
 801
 802         rc = pqi_build_raid_path_request(ctrl_info, &request,
 803                 cmd, RAID_CTLR_LUNID, buffer, buffer_length, 0, &pci_direction);
 804         if (rc)
 805                 return rc;
 806
 807         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 808                 NULL, NO_TIMEOUT);
 809
 810         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 811                 pci_direction);
 812
 813         return rc;
 814 }
 815
 816 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 817         void **buffer)
 818 {
 819         int rc;
 820         size_t lun_list_length;
 821         size_t lun_data_length;
 822         size_t new_lun_list_length;
 823         void *lun_data = NULL;
 824         struct report_lun_header *report_lun_header;
 825
 826         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
 827         if (!report_lun_header) {
 828                 rc = -ENOMEM;
 829                 goto out;
 830         }
 831
 832         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
 833                 sizeof(*report_lun_header));
 834         if (rc)
 835                 goto out;
 836
 837         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
 838
 839 again:
 840         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
 841
 842         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
 843         if (!lun_data) {
 844                 rc = -ENOMEM;
 845                 goto out;
 846         }
 847
 848         if (lun_list_length == 0) {
 849                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
 850                 goto out;
 851         }
 852
 853         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
 854         if (rc)
 855                 goto out;
 856
 857         new_lun_list_length = get_unaligned_be32(
 858                 &((struct report_lun_header *)lun_data)->list_length);
 859
 860         if (new_lun_list_length > lun_list_length) {
 861                 lun_list_length = new_lun_list_length;
 862                 kfree(lun_data);
 863                 goto again;
 864         }
 865
 866 out:
 867         kfree(report_lun_header);
 868
 869         if (rc) {
 870                 kfree(lun_data);
 871                 lun_data = NULL;
 872         }
 873
 874         *buffer = lun_data;
 875
 876         return rc;
 877 }
 878
 879 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
 880         void **buffer)
 881 {
 882         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
 883                 buffer);
 884 }
 885
 886 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
 887         void **buffer)
 888 {
 889         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
 890 }
 891
 892 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
 893         struct report_phys_lun_extended **physdev_list,
 894         struct report_log_lun_extended **logdev_list)
 895 {
 896         int rc;
 897         size_t logdev_list_length;
 898         size_t logdev_data_length;
 899         struct report_log_lun_extended *internal_logdev_list;
 900         struct report_log_lun_extended *logdev_data;
 901         struct report_lun_header report_lun_header;
 902
 903         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
 904         if (rc)
 905                 dev_err(&ctrl_info->pci_dev->dev,
 906                         "report physical LUNs failed\n");
 907
 908         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
 909         if (rc)
 910                 dev_err(&ctrl_info->pci_dev->dev,
 911                         "report logical LUNs failed\n");
 912
 913         /*
 914          * Tack the controller itself onto the end of the logical device list.
 915          */
 916
 917         logdev_data = *logdev_list;
 918
 919         if (logdev_data) {
 920                 logdev_list_length =
 921                         get_unaligned_be32(&logdev_data->header.list_length);
 922         } else {
 923                 memset(&report_lun_header, 0, sizeof(report_lun_header));
 924                 logdev_data =
 925                         (struct report_log_lun_extended *)&report_lun_header;
 926                 logdev_list_length = 0;
 927         }
 928
 929         logdev_data_length = sizeof(struct report_lun_header) +
 930                 logdev_list_length;
 931
 932         internal_logdev_list = kmalloc(logdev_data_length +
 933                 sizeof(struct report_log_lun_extended), GFP_KERNEL);
 934         if (!internal_logdev_list) {
 935                 kfree(*logdev_list);
 936                 *logdev_list = NULL;
 937                 return -ENOMEM;
 938         }
 939
 940         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
 941         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
 942                 sizeof(struct report_log_lun_extended_entry));
 943         put_unaligned_be32(logdev_list_length +
 944                 sizeof(struct report_log_lun_extended_entry),
 945                 &internal_logdev_list->header.list_length);
 946
 947         kfree(*logdev_list);
 948         *logdev_list = internal_logdev_list;
 949
 950         return 0;
 951 }
 952
 953 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
 954         int bus, int target, int lun)
 955 {
 956         device->bus = bus;
 957         device->target = target;
 958         device->lun = lun;
 959 }
 960
 961 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
 962 {
 963         u8 *scsi3addr;
 964         u32 lunid;
 965         int bus;
 966         int target;
 967         int lun;
 968
 969         scsi3addr = device->scsi3addr;
 970         lunid = get_unaligned_le32(scsi3addr);
 971
 972         if (pqi_is_hba_lunid(scsi3addr)) {
 973                 /* The specified device is the controller. */
 974                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
 975                 device->target_lun_valid = true;
 976                 return;
 977         }
 978
 979         if (pqi_is_logical_device(device)) {
 980                 if (device->is_external_raid_device) {
 981                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
 982                         target = (lunid >> 16) & 0x3fff;
 983                         lun = lunid & 0xff;
 984                 } else {
 985                         bus = PQI_RAID_VOLUME_BUS;
 986                         target = 0;
 987                         lun = lunid & 0x3fff;
 988                 }
 989                 pqi_set_bus_target_lun(device, bus, target, lun);
 990                 device->target_lun_valid = true;
 991                 return;
 992         }
 993
 994         /*
 995          * Defer target and LUN assignment for non-controller physical devices
 996          * because the SAS transport layer will make these assignments later.
 997          */
 998         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
 999 }
1000
1001 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
1002         struct pqi_scsi_dev *device)
1003 {
1004         int rc;
1005         u8 raid_level;
1006         u8 *buffer;
1007
1008         raid_level = SA_RAID_UNKNOWN;
1009
1010         buffer = kmalloc(64, GFP_KERNEL);
1011         if (buffer) {
1012                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1013                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1014                 if (rc == 0) {
1015                         raid_level = buffer[8];
1016                         if (raid_level > SA_RAID_MAX)
1017                                 raid_level = SA_RAID_UNKNOWN;
1018                 }
1019                 kfree(buffer);
1020         }
1021
1022         device->raid_level = raid_level;
1023 }
1024
1025 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1026         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1027 {
1028         char *err_msg;
1029         u32 raid_map_size;
1030         u32 r5or6_blocks_per_row;
1031         unsigned int num_phys_disks;
1032         unsigned int num_raid_map_entries;
1033
1034         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1035
1036         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1037                 err_msg = "RAID map too small";
1038                 goto bad_raid_map;
1039         }
1040
1041         if (raid_map_size > sizeof(*raid_map)) {
1042                 err_msg = "RAID map too large";
1043                 goto bad_raid_map;
1044         }
1045
1046         num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
1047                 (get_unaligned_le16(&raid_map->data_disks_per_row) +
1048                 get_unaligned_le16(&raid_map->metadata_disks_per_row));
1049         num_raid_map_entries = num_phys_disks *
1050                 get_unaligned_le16(&raid_map->row_cnt);
1051
1052         if (num_raid_map_entries > RAID_MAP_MAX_ENTRIES) {
1053                 err_msg = "invalid number of map entries in RAID map";
1054                 goto bad_raid_map;
1055         }
1056
1057         if (device->raid_level == SA_RAID_1) {
1058                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1059                         err_msg = "invalid RAID-1 map";
1060                         goto bad_raid_map;
1061                 }
1062         } else if (device->raid_level == SA_RAID_ADM) {
1063                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1064                         err_msg = "invalid RAID-1(ADM) map";
1065                         goto bad_raid_map;
1066                 }
1067         } else if ((device->raid_level == SA_RAID_5 ||
1068                 device->raid_level == SA_RAID_6) &&
1069                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1070                 /* RAID 50/60 */
1071                 r5or6_blocks_per_row =
1072                         get_unaligned_le16(&raid_map->strip_size) *
1073                         get_unaligned_le16(&raid_map->data_disks_per_row);
1074                 if (r5or6_blocks_per_row == 0) {
1075                         err_msg = "invalid RAID-5 or RAID-6 map";
1076                         goto bad_raid_map;
1077                 }
1078         }
1079
1080         return 0;
1081
1082 bad_raid_map:
1083         dev_warn(&ctrl_info->pci_dev->dev,
1084                 "scsi %d:%d:%d:%d %s\n",
1085                 ctrl_info->scsi_host->host_no,
1086                 device->bus, device->target, device->lun, err_msg);
1087
1088         return -EINVAL;
1089 }
1090
1091 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1092         struct pqi_scsi_dev *device)
1093 {
1094         int rc;
1095         int pci_direction;
1096         struct pqi_raid_path_request request;
1097         struct raid_map *raid_map;
1098
1099         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1100         if (!raid_map)
1101                 return -ENOMEM;
1102
1103         rc = pqi_build_raid_path_request(ctrl_info, &request,
1104                 CISS_GET_RAID_MAP, device->scsi3addr, raid_map,
1105                 sizeof(*raid_map), 0, &pci_direction);
1106         if (rc)
1107                 goto error;
1108
1109         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
1110                 NULL, NO_TIMEOUT);
1111
1112         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
1113                 pci_direction);
1114
1115         if (rc)
1116                 goto error;
1117
1118         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1119         if (rc)
1120                 goto error;
1121
1122         device->raid_map = raid_map;
1123
1124         return 0;
1125
1126 error:
1127         kfree(raid_map);
1128
1129         return rc;
1130 }
1131
1132 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1133         struct pqi_scsi_dev *device)
1134 {
1135         int rc;
1136         u8 *buffer;
1137         u8 bypass_status;
1138
1139         buffer = kmalloc(64, GFP_KERNEL);
1140         if (!buffer)
1141                 return;
1142
1143         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1144                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1145         if (rc)
1146                 goto out;
1147
1148 #define RAID_BYPASS_STATUS      4
1149 #define RAID_BYPASS_CONFIGURED  0x1
1150 #define RAID_BYPASS_ENABLED     0x2
1151
1152         bypass_status = buffer[RAID_BYPASS_STATUS];
1153         device->raid_bypass_configured =
1154                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1155         if (device->raid_bypass_configured &&
1156                 (bypass_status & RAID_BYPASS_ENABLED) &&
1157                 pqi_get_raid_map(ctrl_info, device) == 0)
1158                 device->raid_bypass_enabled = true;
1159
1160 out:
1161         kfree(buffer);
1162 }
1163
1164 /*
1165  * Use vendor-specific VPD to determine online/offline status of a volume.
1166  */
1167
1168 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1169         struct pqi_scsi_dev *device)
1170 {
1171         int rc;
1172         size_t page_length;
1173         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1174         bool volume_offline = true;
1175         u32 volume_flags;
1176         struct ciss_vpd_logical_volume_status *vpd;
1177
1178         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1179         if (!vpd)
1180                 goto no_buffer;
1181
1182         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1183                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1184         if (rc)
1185                 goto out;
1186
1187         if (vpd->page_code != CISS_VPD_LV_STATUS)
1188                 goto out;
1189
1190         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1191                 volume_status) + vpd->page_length;
1192         if (page_length < sizeof(*vpd))
1193                 goto out;
1194
1195         volume_status = vpd->volume_status;
1196         volume_flags = get_unaligned_be32(&vpd->flags);
1197         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1198
1199 out:
1200         kfree(vpd);
1201 no_buffer:
1202         device->volume_status = volume_status;
1203         device->volume_offline = volume_offline;
1204 }
1205
1206 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1207         struct pqi_scsi_dev *device)
1208 {
1209         int rc;
1210         u8 *buffer;
1211
1212         buffer = kmalloc(64, GFP_KERNEL);
1213         if (!buffer)
1214                 return -ENOMEM;
1215
1216         /* Send an inquiry to the device to see what it is. */
1217         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1218         if (rc)
1219                 goto out;
1220
1221         scsi_sanitize_inquiry_string(&buffer[8], 8);
1222         scsi_sanitize_inquiry_string(&buffer[16], 16);
1223
1224         device->devtype = buffer[0] & 0x1f;
1225         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1226         memcpy(device->model, &buffer[16], sizeof(device->model));
1227
1228         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
1229                 if (device->is_external_raid_device) {
1230                         device->raid_level = SA_RAID_UNKNOWN;
1231                         device->volume_status = CISS_LV_OK;
1232                         device->volume_offline = false;
1233                 } else {
1234                         pqi_get_raid_level(ctrl_info, device);
1235                         pqi_get_raid_bypass_status(ctrl_info, device);
1236                         pqi_get_volume_status(ctrl_info, device);
1237                 }
1238         }
1239
1240 out:
1241         kfree(buffer);
1242
1243         return rc;
1244 }
1245
1246 static void pqi_get_physical_disk_info(struct pqi_ctrl_info *ctrl_info,
1247         struct pqi_scsi_dev *device,
1248         struct bmic_identify_physical_device *id_phys)
1249 {
1250         int rc;
1251
1252         memset(id_phys, 0, sizeof(*id_phys));
1253
1254         rc = pqi_identify_physical_device(ctrl_info, device,
1255                 id_phys, sizeof(*id_phys));
1256         if (rc) {
1257                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1258                 return;
1259         }
1260
1261         device->queue_depth =
1262                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1263         device->device_type = id_phys->device_type;
1264         device->active_path_index = id_phys->active_path_number;
1265         device->path_map = id_phys->redundant_path_present_map;
1266         memcpy(&device->box,
1267                 &id_phys->alternate_paths_phys_box_on_port,
1268                 sizeof(device->box));
1269         memcpy(&device->phys_connector,
1270                 &id_phys->alternate_paths_phys_connector,
1271                 sizeof(device->phys_connector));
1272         device->bay = id_phys->phys_bay_in_box;
1273 }
1274
1275 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1276         struct pqi_scsi_dev *device)
1277 {
1278         char *status;
1279         static const char unknown_state_str[] =
1280                 "Volume is in an unknown state (%u)";
1281         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1282
1283         switch (device->volume_status) {
1284         case CISS_LV_OK:
1285                 status = "Volume online";
1286                 break;
1287         case CISS_LV_FAILED:
1288                 status = "Volume failed";
1289                 break;
1290         case CISS_LV_NOT_CONFIGURED:
1291                 status = "Volume not configured";
1292                 break;
1293         case CISS_LV_DEGRADED:
1294                 status = "Volume degraded";
1295                 break;
1296         case CISS_LV_READY_FOR_RECOVERY:
1297                 status = "Volume ready for recovery operation";
1298                 break;
1299         case CISS_LV_UNDERGOING_RECOVERY:
1300                 status = "Volume undergoing recovery";
1301                 break;
1302         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1303                 status = "Wrong physical drive was replaced";
1304                 break;
1305         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1306                 status = "A physical drive not properly connected";
1307                 break;
1308         case CISS_LV_HARDWARE_OVERHEATING:
1309                 status = "Hardware is overheating";
1310                 break;
1311         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1312                 status = "Hardware has overheated";
1313                 break;
1314         case CISS_LV_UNDERGOING_EXPANSION:
1315                 status = "Volume undergoing expansion";
1316                 break;
1317         case CISS_LV_NOT_AVAILABLE:
1318                 status = "Volume waiting for transforming volume";
1319                 break;
1320         case CISS_LV_QUEUED_FOR_EXPANSION:
1321                 status = "Volume queued for expansion";
1322                 break;
1323         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1324                 status = "Volume disabled due to SCSI ID conflict";
1325                 break;
1326         case CISS_LV_EJECTED:
1327                 status = "Volume has been ejected";
1328                 break;
1329         case CISS_LV_UNDERGOING_ERASE:
1330                 status = "Volume undergoing background erase";
1331                 break;
1332         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1333                 status = "Volume ready for predictive spare rebuild";
1334                 break;
1335         case CISS_LV_UNDERGOING_RPI:
1336                 status = "Volume undergoing rapid parity initialization";
1337                 break;
1338         case CISS_LV_PENDING_RPI:
1339                 status = "Volume queued for rapid parity initialization";
1340                 break;
1341         case CISS_LV_ENCRYPTED_NO_KEY:
1342                 status = "Encrypted volume inaccessible - key not present";
1343                 break;
1344         case CISS_LV_UNDERGOING_ENCRYPTION:
1345                 status = "Volume undergoing encryption process";
1346                 break;
1347         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1348                 status = "Volume undergoing encryption re-keying process";
1349                 break;
1350         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1351                 status = "Volume encrypted but encryption is disabled";
1352                 break;
1353         case CISS_LV_PENDING_ENCRYPTION:
1354                 status = "Volume pending migration to encrypted state";
1355                 break;
1356         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1357                 status = "Volume pending encryption rekeying";
1358                 break;
1359         case CISS_LV_NOT_SUPPORTED:
1360                 status = "Volume not supported on this controller";
1361                 break;
1362         case CISS_LV_STATUS_UNAVAILABLE:
1363                 status = "Volume status not available";
1364                 break;
1365         default:
1366                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1367                         unknown_state_str, device->volume_status);
1368                 status = unknown_state_buffer;
1369                 break;
1370         }
1371
1372         dev_info(&ctrl_info->pci_dev->dev,
1373                 "scsi %d:%d:%d:%d %s\n",
1374                 ctrl_info->scsi_host->host_no,
1375                 device->bus, device->target, device->lun, status);
1376 }
1377
1378 static void pqi_rescan_worker(struct work_struct *work)
1379 {
1380         struct pqi_ctrl_info *ctrl_info;
1381
1382         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1383                 rescan_work);
1384
1385         pqi_scan_scsi_devices(ctrl_info);
1386 }
1387
1388 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1389         struct pqi_scsi_dev *device)
1390 {
1391         int rc;
1392
1393         if (pqi_is_logical_device(device))
1394                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1395                         device->target, device->lun);
1396         else
1397                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1398
1399         return rc;
1400 }
1401
1402 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
1403         struct pqi_scsi_dev *device)
1404 {
1405         if (pqi_is_logical_device(device))
1406                 scsi_remove_device(device->sdev);
1407         else
1408                 pqi_remove_sas_device(device);
1409 }
1410
1411 /* Assumes the SCSI device list lock is held. */
1412
1413 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1414         int bus, int target, int lun)
1415 {
1416         struct pqi_scsi_dev *device;
1417
1418         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1419                 scsi_device_list_entry)
1420                 if (device->bus == bus && device->target == target &&
1421                         device->lun == lun)
1422                         return device;
1423
1424         return NULL;
1425 }
1426
1427 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1,
1428         struct pqi_scsi_dev *dev2)
1429 {
1430         if (dev1->is_physical_device != dev2->is_physical_device)
1431                 return false;
1432
1433         if (dev1->is_physical_device)
1434                 return dev1->wwid == dev2->wwid;
1435
1436         return memcmp(dev1->volume_id, dev2->volume_id,
1437                 sizeof(dev1->volume_id)) == 0;
1438 }
1439
1440 enum pqi_find_result {
1441         DEVICE_NOT_FOUND,
1442         DEVICE_CHANGED,
1443         DEVICE_SAME,
1444 };
1445
1446 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1447         struct pqi_scsi_dev *device_to_find,
1448         struct pqi_scsi_dev **matching_device)
1449 {
1450         struct pqi_scsi_dev *device;
1451
1452         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1453                 scsi_device_list_entry) {
1454                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr,
1455                         device->scsi3addr)) {
1456                         *matching_device = device;
1457                         if (pqi_device_equal(device_to_find, device)) {
1458                                 if (device_to_find->volume_offline)
1459                                         return DEVICE_CHANGED;
1460                                 return DEVICE_SAME;
1461                         }
1462                         return DEVICE_CHANGED;
1463                 }
1464         }
1465
1466         return DEVICE_NOT_FOUND;
1467 }
1468
1469 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1470
1471 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1472         char *action, struct pqi_scsi_dev *device)
1473 {
1474         ssize_t count;
1475         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1476
1477         count = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1478                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1479
1480         if (device->target_lun_valid)
1481                 count += snprintf(buffer + count,
1482                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1483                         "%d:%d",
1484                         device->target,
1485                         device->lun);
1486         else
1487                 count += snprintf(buffer + count,
1488                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1489                         "-:-");
1490
1491         if (pqi_is_logical_device(device))
1492                 count += snprintf(buffer + count,
1493                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1494                         " %08x%08x",
1495                         *((u32 *)&device->scsi3addr),
1496                         *((u32 *)&device->scsi3addr[4]));
1497         else
1498                 count += snprintf(buffer + count,
1499                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1500                         " %016llx", device->sas_address);
1501
1502         count += snprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1503                 " %s %.8s %.16s ",
1504                 scsi_device_type(device->devtype),
1505                 device->vendor,
1506                 device->model);
1507
1508         if (pqi_is_logical_device(device)) {
1509                 if (device->devtype == TYPE_DISK)
1510                         count += snprintf(buffer + count,
1511                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1512                                 "SSDSmartPathCap%c En%c %-12s",
1513                                 device->raid_bypass_configured ? '+' : '-',
1514                                 device->raid_bypass_enabled ? '+' : '-',
1515                                 pqi_raid_level_to_string(device->raid_level));
1516         } else {
1517                 count += snprintf(buffer + count,
1518                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1519                         "AIO%c", device->aio_enabled ? '+' : '-');
1520                 if (device->devtype == TYPE_DISK ||
1521                         device->devtype == TYPE_ZBC)
1522                         count += snprintf(buffer + count,
1523                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1524                                 " qd=%-6d", device->queue_depth);
1525         }
1526
1527         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
1528 }
1529
1530 /* Assumes the SCSI device list lock is held. */
1531
1532 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1533         struct pqi_scsi_dev *new_device)
1534 {
1535         existing_device->devtype = new_device->devtype;
1536         existing_device->device_type = new_device->device_type;
1537         existing_device->bus = new_device->bus;
1538         if (new_device->target_lun_valid) {
1539                 existing_device->target = new_device->target;
1540                 existing_device->lun = new_device->lun;
1541                 existing_device->target_lun_valid = true;
1542         }
1543
1544         /* By definition, the scsi3addr and wwid fields are already the same. */
1545
1546         existing_device->is_physical_device = new_device->is_physical_device;
1547         existing_device->is_external_raid_device =
1548                 new_device->is_external_raid_device;
1549         existing_device->aio_enabled = new_device->aio_enabled;
1550         memcpy(existing_device->vendor, new_device->vendor,
1551                 sizeof(existing_device->vendor));
1552         memcpy(existing_device->model, new_device->model,
1553                 sizeof(existing_device->model));
1554         existing_device->sas_address = new_device->sas_address;
1555         existing_device->raid_level = new_device->raid_level;
1556         existing_device->queue_depth = new_device->queue_depth;
1557         existing_device->aio_handle = new_device->aio_handle;
1558         existing_device->volume_status = new_device->volume_status;
1559         existing_device->active_path_index = new_device->active_path_index;
1560         existing_device->path_map = new_device->path_map;
1561         existing_device->bay = new_device->bay;
1562         memcpy(existing_device->box, new_device->box,
1563                 sizeof(existing_device->box));
1564         memcpy(existing_device->phys_connector, new_device->phys_connector,
1565                 sizeof(existing_device->phys_connector));
1566         existing_device->offload_to_mirror = 0;
1567         kfree(existing_device->raid_map);
1568         existing_device->raid_map = new_device->raid_map;
1569         existing_device->raid_bypass_configured =
1570                 new_device->raid_bypass_configured;
1571         existing_device->raid_bypass_enabled =
1572                 new_device->raid_bypass_enabled;
1573
1574         /* To prevent this from being freed later. */
1575         new_device->raid_map = NULL;
1576 }
1577
1578 static inline void pqi_free_device(struct pqi_scsi_dev *device)
1579 {
1580         if (device) {
1581                 kfree(device->raid_map);
1582                 kfree(device);
1583         }
1584 }
1585
1586 /*
1587  * Called when exposing a new device to the OS fails in order to re-adjust
1588  * our internal SCSI device list to match the SCSI ML's view.
1589  */
1590
1591 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1592         struct pqi_scsi_dev *device)
1593 {
1594         unsigned long flags;
1595
1596         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1597         list_del(&device->scsi_device_list_entry);
1598         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1599
1600         /* Allow the device structure to be freed later. */
1601         device->keep_device = false;
1602 }
1603
1604 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1605         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1606 {
1607         int rc;
1608         unsigned int i;
1609         unsigned long flags;
1610         enum pqi_find_result find_result;
1611         struct pqi_scsi_dev *device;
1612         struct pqi_scsi_dev *next;
1613         struct pqi_scsi_dev *matching_device;
1614         LIST_HEAD(add_list);
1615         LIST_HEAD(delete_list);
1616
1617         /*
1618          * The idea here is to do as little work as possible while holding the
1619          * spinlock.  That's why we go to great pains to defer anything other
1620          * than updating the internal device list until after we release the
1621          * spinlock.
1622          */
1623
1624         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1625
1626         /* Assume that all devices in the existing list have gone away. */
1627         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1628                 scsi_device_list_entry)
1629                 device->device_gone = true;
1630
1631         for (i = 0; i < num_new_devices; i++) {
1632                 device = new_device_list[i];
1633
1634                 find_result = pqi_scsi_find_entry(ctrl_info, device,
1635                                                 &matching_device);
1636
1637                 switch (find_result) {
1638                 case DEVICE_SAME:
1639                         /*
1640                          * The newly found device is already in the existing
1641                          * device list.
1642                          */
1643                         device->new_device = false;
1644                         matching_device->device_gone = false;
1645                         pqi_scsi_update_device(matching_device, device);
1646                         break;
1647                 case DEVICE_NOT_FOUND:
1648                         /*
1649                          * The newly found device is NOT in the existing device
1650                          * list.
1651                          */
1652                         device->new_device = true;
1653                         break;
1654                 case DEVICE_CHANGED:
1655                         /*
1656                          * The original device has gone away and we need to add
1657                          * the new device.
1658                          */
1659                         device->new_device = true;
1660                         break;
1661                 }
1662         }
1663
1664         /* Process all devices that have gone away. */
1665         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1666                 scsi_device_list_entry) {
1667                 if (device->device_gone) {
1668                         list_del(&device->scsi_device_list_entry);
1669                         list_add_tail(&device->delete_list_entry, &delete_list);
1670                 }
1671         }
1672
1673         /* Process all new devices. */
1674         for (i = 0; i < num_new_devices; i++) {
1675                 device = new_device_list[i];
1676                 if (!device->new_device)
1677                         continue;
1678                 if (device->volume_offline)
1679                         continue;
1680                 list_add_tail(&device->scsi_device_list_entry,
1681                         &ctrl_info->scsi_device_list);
1682                 list_add_tail(&device->add_list_entry, &add_list);
1683                 /* To prevent this device structure from being freed later. */
1684                 device->keep_device = true;
1685         }
1686
1687         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1688
1689         /* Remove all devices that have gone away. */
1690         list_for_each_entry_safe(device, next, &delete_list,
1691                 delete_list_entry) {
1692                 if (device->volume_offline) {
1693                         pqi_dev_info(ctrl_info, "offline", device);
1694                         pqi_show_volume_status(ctrl_info, device);
1695                 } else {
1696                         pqi_dev_info(ctrl_info, "removed", device);
1697                 }
1698                 if (device->sdev)
1699                         pqi_remove_device(ctrl_info, device);
1700                 list_del(&device->delete_list_entry);
1701                 pqi_free_device(device);
1702         }
1703
1704         /*
1705          * Notify the SCSI ML if the queue depth of any existing device has
1706          * changed.
1707          */
1708         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1709                 scsi_device_list_entry) {
1710                 if (device->sdev && device->queue_depth !=
1711                         device->advertised_queue_depth) {
1712                         device->advertised_queue_depth = device->queue_depth;
1713                         scsi_change_queue_depth(device->sdev,
1714                                 device->advertised_queue_depth);
1715                 }
1716         }
1717
1718         /* Expose any new devices. */
1719         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
1720                 if (!device->sdev) {
1721                         pqi_dev_info(ctrl_info, "added", device);
1722                         rc = pqi_add_device(ctrl_info, device);
1723                         if (rc) {
1724                                 dev_warn(&ctrl_info->pci_dev->dev,
1725                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
1726                                         ctrl_info->scsi_host->host_no,
1727                                         device->bus, device->target,
1728                                         device->lun);
1729                                 pqi_fixup_botched_add(ctrl_info, device);
1730                         }
1731                 }
1732         }
1733 }
1734
1735 static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
1736 {
1737         bool is_supported = false;
1738
1739         switch (device->devtype) {
1740         case TYPE_DISK:
1741         case TYPE_ZBC:
1742         case TYPE_TAPE:
1743         case TYPE_MEDIUM_CHANGER:
1744         case TYPE_ENCLOSURE:
1745                 is_supported = true;
1746                 break;
1747         case TYPE_RAID:
1748                 /*
1749                  * Only support the HBA controller itself as a RAID
1750                  * controller.  If it's a RAID controller other than
1751                  * the HBA itself (an external RAID controller, for
1752                  * example), we don't support it.
1753                  */
1754                 if (pqi_is_hba_lunid(device->scsi3addr))
1755                         is_supported = true;
1756                 break;
1757         }
1758
1759         return is_supported;
1760 }
1761
1762 static inline bool pqi_skip_device(u8 *scsi3addr)
1763 {
1764         /* Ignore all masked devices. */
1765         if (MASKED_DEVICE(scsi3addr))
1766                 return true;
1767
1768         return false;
1769 }
1770
1771 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1772 {
1773         int i;
1774         int rc;
1775         LIST_HEAD(new_device_list_head);
1776         struct report_phys_lun_extended *physdev_list = NULL;
1777         struct report_log_lun_extended *logdev_list = NULL;
1778         struct report_phys_lun_extended_entry *phys_lun_ext_entry;
1779         struct report_log_lun_extended_entry *log_lun_ext_entry;
1780         struct bmic_identify_physical_device *id_phys = NULL;
1781         u32 num_physicals;
1782         u32 num_logicals;
1783         struct pqi_scsi_dev **new_device_list = NULL;
1784         struct pqi_scsi_dev *device;
1785         struct pqi_scsi_dev *next;
1786         unsigned int num_new_devices;
1787         unsigned int num_valid_devices;
1788         bool is_physical_device;
1789         u8 *scsi3addr;
1790         static char *out_of_memory_msg =
1791                 "failed to allocate memory, device discovery stopped";
1792
1793         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
1794         if (rc)
1795                 goto out;
1796
1797         if (physdev_list)
1798                 num_physicals =
1799                         get_unaligned_be32(&physdev_list->header.list_length)
1800                                 / sizeof(physdev_list->lun_entries[0]);
1801         else
1802                 num_physicals = 0;
1803
1804         if (logdev_list)
1805                 num_logicals =
1806                         get_unaligned_be32(&logdev_list->header.list_length)
1807                                 / sizeof(logdev_list->lun_entries[0]);
1808         else
1809                 num_logicals = 0;
1810
1811         if (num_physicals) {
1812                 /*
1813                  * We need this buffer for calls to pqi_get_physical_disk_info()
1814                  * below.  We allocate it here instead of inside
1815                  * pqi_get_physical_disk_info() because it's a fairly large
1816                  * buffer.
1817                  */
1818                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
1819                 if (!id_phys) {
1820                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1821                                 out_of_memory_msg);
1822                         rc = -ENOMEM;
1823                         goto out;
1824                 }
1825         }
1826
1827         num_new_devices = num_physicals + num_logicals;
1828
1829         new_device_list = kmalloc(sizeof(*new_device_list) *
1830                 num_new_devices, GFP_KERNEL);
1831         if (!new_device_list) {
1832                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
1833                 rc = -ENOMEM;
1834                 goto out;
1835         }
1836
1837         for (i = 0; i < num_new_devices; i++) {
1838                 device = kzalloc(sizeof(*device), GFP_KERNEL);
1839                 if (!device) {
1840                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1841                                 out_of_memory_msg);
1842                         rc = -ENOMEM;
1843                         goto out;
1844                 }
1845                 list_add_tail(&device->new_device_list_entry,
1846                         &new_device_list_head);
1847         }
1848
1849         device = NULL;
1850         num_valid_devices = 0;
1851
1852         for (i = 0; i < num_new_devices; i++) {
1853
1854                 if (i < num_physicals) {
1855                         is_physical_device = true;
1856                         phys_lun_ext_entry = &physdev_list->lun_entries[i];
1857                         log_lun_ext_entry = NULL;
1858                         scsi3addr = phys_lun_ext_entry->lunid;
1859                 } else {
1860                         is_physical_device = false;
1861                         phys_lun_ext_entry = NULL;
1862                         log_lun_ext_entry =
1863                                 &logdev_list->lun_entries[i - num_physicals];
1864                         scsi3addr = log_lun_ext_entry->lunid;
1865                 }
1866
1867                 if (is_physical_device && pqi_skip_device(scsi3addr))
1868                         continue;
1869
1870                 if (device)
1871                         device = list_next_entry(device, new_device_list_entry);
1872                 else
1873                         device = list_first_entry(&new_device_list_head,
1874                                 struct pqi_scsi_dev, new_device_list_entry);
1875
1876                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
1877                 device->is_physical_device = is_physical_device;
1878                 if (!is_physical_device)
1879                         device->is_external_raid_device =
1880                                 pqi_is_external_raid_addr(scsi3addr);
1881
1882                 /* Gather information about the device. */
1883                 rc = pqi_get_device_info(ctrl_info, device);
1884                 if (rc == -ENOMEM) {
1885                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1886                                 out_of_memory_msg);
1887                         goto out;
1888                 }
1889                 if (rc) {
1890                         if (device->is_physical_device)
1891                                 dev_warn(&ctrl_info->pci_dev->dev,
1892                                         "obtaining device info failed, skipping physical device %016llx\n",
1893                                         get_unaligned_be64(
1894                                                 &phys_lun_ext_entry->wwid));
1895                         else
1896                                 dev_warn(&ctrl_info->pci_dev->dev,
1897                                         "obtaining device info failed, skipping logical device %08x%08x\n",
1898                                         *((u32 *)&device->scsi3addr),
1899                                         *((u32 *)&device->scsi3addr[4]));
1900                         rc = 0;
1901                         continue;
1902                 }
1903
1904                 if (!pqi_is_supported_device(device))
1905                         continue;
1906
1907                 pqi_assign_bus_target_lun(device);
1908
1909                 if (device->is_physical_device) {
1910                         device->wwid = phys_lun_ext_entry->wwid;
1911                         if ((phys_lun_ext_entry->device_flags &
1912                                 REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
1913                                 phys_lun_ext_entry->aio_handle)
1914                                 device->aio_enabled = true;
1915                 } else {
1916                         memcpy(device->volume_id, log_lun_ext_entry->volume_id,
1917                                 sizeof(device->volume_id));
1918                 }
1919
1920                 switch (device->devtype) {
1921                 case TYPE_DISK:
1922                 case TYPE_ZBC:
1923                 case TYPE_ENCLOSURE:
1924                         if (device->is_physical_device) {
1925                                 device->sas_address =
1926                                         get_unaligned_be64(&device->wwid);
1927                                 if (device->devtype == TYPE_DISK ||
1928                                         device->devtype == TYPE_ZBC) {
1929                                         device->aio_handle =
1930                                                 phys_lun_ext_entry->aio_handle;
1931                                         pqi_get_physical_disk_info(ctrl_info,
1932                                                 device, id_phys);
1933                                 }
1934                         }
1935                         break;
1936                 }
1937
1938                 new_device_list[num_valid_devices++] = device;
1939         }
1940
1941         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
1942
1943 out:
1944         list_for_each_entry_safe(device, next, &new_device_list_head,
1945                 new_device_list_entry) {
1946                 if (device->keep_device)
1947                         continue;
1948                 list_del(&device->new_device_list_entry);
1949                 pqi_free_device(device);
1950         }
1951
1952         kfree(new_device_list);
1953         kfree(physdev_list);
1954         kfree(logdev_list);
1955         kfree(id_phys);
1956
1957         return rc;
1958 }
1959
1960 static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1961 {
1962         unsigned long flags;
1963         struct pqi_scsi_dev *device;
1964
1965         while (1) {
1966                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1967
1968                 device = list_first_entry_or_null(&ctrl_info->scsi_device_list,
1969                         struct pqi_scsi_dev, scsi_device_list_entry);
1970                 if (device)
1971                         list_del(&device->scsi_device_list_entry);
1972
1973                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
1974                         flags);
1975
1976                 if (!device)
1977                         break;
1978
1979                 if (device->sdev)
1980                         pqi_remove_device(ctrl_info, device);
1981                 pqi_free_device(device);
1982         }
1983 }
1984
1985 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1986 {
1987         int rc;
1988
1989         if (pqi_ctrl_offline(ctrl_info))
1990                 return -ENXIO;
1991
1992         mutex_lock(&ctrl_info->scan_mutex);
1993
1994         rc = pqi_update_scsi_devices(ctrl_info);
1995         if (rc)
1996                 pqi_schedule_rescan_worker_delayed(ctrl_info);
1997
1998         mutex_unlock(&ctrl_info->scan_mutex);
1999
2000         return rc;
2001 }
2002
2003 static void pqi_scan_start(struct Scsi_Host *shost)
2004 {
2005         pqi_scan_scsi_devices(shost_to_hba(shost));
2006 }
2007
2008 /* Returns TRUE if scan is finished. */
2009
2010 static int pqi_scan_finished(struct Scsi_Host *shost,
2011         unsigned long elapsed_time)
2012 {
2013         struct pqi_ctrl_info *ctrl_info;
2014
2015         ctrl_info = shost_priv(shost);
2016
2017         return !mutex_is_locked(&ctrl_info->scan_mutex);
2018 }
2019
2020 static void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info)
2021 {
2022         mutex_lock(&ctrl_info->scan_mutex);
2023         mutex_unlock(&ctrl_info->scan_mutex);
2024 }
2025
2026 static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info)
2027 {
2028         mutex_lock(&ctrl_info->lun_reset_mutex);
2029         mutex_unlock(&ctrl_info->lun_reset_mutex);
2030 }
2031
2032 static inline void pqi_set_encryption_info(
2033         struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
2034         u64 first_block)
2035 {
2036         u32 volume_blk_size;
2037
2038         /*
2039          * Set the encryption tweak values based on logical block address.
2040          * If the block size is 512, the tweak value is equal to the LBA.
2041          * For other block sizes, tweak value is (LBA * block size) / 512.
2042          */
2043         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2044         if (volume_blk_size != 512)
2045                 first_block = (first_block * volume_blk_size) / 512;
2046
2047         encryption_info->data_encryption_key_index =
2048                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2049         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2050         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2051 }
2052
2053 /*
2054  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2055  */
2056
2057 #define PQI_RAID_BYPASS_INELIGIBLE      1
2058
2059 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2060         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2061         struct pqi_queue_group *queue_group)
2062 {
2063         struct raid_map *raid_map;
2064         bool is_write = false;
2065         u32 map_index;
2066         u64 first_block;
2067         u64 last_block;
2068         u32 block_cnt;
2069         u32 blocks_per_row;
2070         u64 first_row;
2071         u64 last_row;
2072         u32 first_row_offset;
2073         u32 last_row_offset;
2074         u32 first_column;
2075         u32 last_column;
2076         u64 r0_first_row;
2077         u64 r0_last_row;
2078         u32 r5or6_blocks_per_row;
2079         u64 r5or6_first_row;
2080         u64 r5or6_last_row;
2081         u32 r5or6_first_row_offset;
2082         u32 r5or6_last_row_offset;
2083         u32 r5or6_first_column;
2084         u32 r5or6_last_column;
2085         u16 data_disks_per_row;
2086         u32 total_disks_per_row;
2087         u16 layout_map_count;
2088         u32 stripesize;
2089         u16 strip_size;
2090         u32 first_group;
2091         u32 last_group;
2092         u32 current_group;
2093         u32 map_row;
2094         u32 aio_handle;
2095         u64 disk_block;
2096         u32 disk_block_cnt;
2097         u8 cdb[16];
2098         u8 cdb_length;
2099         int offload_to_mirror;
2100         struct pqi_encryption_info *encryption_info_ptr;
2101         struct pqi_encryption_info encryption_info;
2102 #if BITS_PER_LONG == 32
2103         u64 tmpdiv;
2104 #endif
2105
2106         /* Check for valid opcode, get LBA and block count. */
2107         switch (scmd->cmnd[0]) {
2108         case WRITE_6:
2109                 is_write = true;
2110                 /* fall through */
2111         case READ_6:
2112                 first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2113                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2114                 block_cnt = (u32)scmd->cmnd[4];
2115                 if (block_cnt == 0)
2116                         block_cnt = 256;
2117                 break;
2118         case WRITE_10:
2119                 is_write = true;
2120                 /* fall through */
2121         case READ_10:
2122                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2123                 block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2124                 break;
2125         case WRITE_12:
2126                 is_write = true;
2127                 /* fall through */
2128         case READ_12:
2129                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2130                 block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2131                 break;
2132         case WRITE_16:
2133                 is_write = true;
2134                 /* fall through */
2135         case READ_16:
2136                 first_block = get_unaligned_be64(&scmd->cmnd[2]);
2137                 block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2138                 break;
2139         default:
2140                 /* Process via normal I/O path. */
2141                 return PQI_RAID_BYPASS_INELIGIBLE;
2142         }
2143
2144         /* Check for write to non-RAID-0. */
2145         if (is_write && device->raid_level != SA_RAID_0)
2146                 return PQI_RAID_BYPASS_INELIGIBLE;
2147
2148         if (unlikely(block_cnt == 0))
2149                 return PQI_RAID_BYPASS_INELIGIBLE;
2150
2151         last_block = first_block + block_cnt - 1;
2152         raid_map = device->raid_map;
2153
2154         /* Check for invalid block or wraparound. */
2155         if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2156                 last_block < first_block)
2157                 return PQI_RAID_BYPASS_INELIGIBLE;
2158
2159         data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
2160         strip_size = get_unaligned_le16(&raid_map->strip_size);
2161         layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2162
2163         /* Calculate stripe information for the request. */
2164         blocks_per_row = data_disks_per_row * strip_size;
2165 #if BITS_PER_LONG == 32
2166         tmpdiv = first_block;
2167         do_div(tmpdiv, blocks_per_row);
2168         first_row = tmpdiv;
2169         tmpdiv = last_block;
2170         do_div(tmpdiv, blocks_per_row);
2171         last_row = tmpdiv;
2172         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2173         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2174         tmpdiv = first_row_offset;
2175         do_div(tmpdiv, strip_size);
2176         first_column = tmpdiv;
2177         tmpdiv = last_row_offset;
2178         do_div(tmpdiv, strip_size);
2179         last_column = tmpdiv;
2180 #else
2181         first_row = first_block / blocks_per_row;
2182         last_row = last_block / blocks_per_row;
2183         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2184         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2185         first_column = first_row_offset / strip_size;
2186         last_column = last_row_offset / strip_size;
2187 #endif
2188
2189         /* If this isn't a single row/column then give to the controller. */
2190         if (first_row != last_row || first_column != last_column)
2191                 return PQI_RAID_BYPASS_INELIGIBLE;
2192
2193         /* Proceeding with driver mapping. */
2194         total_disks_per_row = data_disks_per_row +
2195                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2196         map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2197                 get_unaligned_le16(&raid_map->row_cnt);
2198         map_index = (map_row * total_disks_per_row) + first_column;
2199
2200         /* RAID 1 */
2201         if (device->raid_level == SA_RAID_1) {
2202                 if (device->offload_to_mirror)
2203                         map_index += data_disks_per_row;
2204                 device->offload_to_mirror = !device->offload_to_mirror;
2205         } else if (device->raid_level == SA_RAID_ADM) {
2206                 /* RAID ADM */
2207                 /*
2208                  * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
2209                  * divisible by 3.
2210                  */
2211                 offload_to_mirror = device->offload_to_mirror;
2212                 if (offload_to_mirror == 0)  {
2213                         /* use physical disk in the first mirrored group. */
2214                         map_index %= data_disks_per_row;
2215                 } else {
2216                         do {
2217                                 /*
2218                                  * Determine mirror group that map_index
2219                                  * indicates.
2220                                  */
2221                                 current_group = map_index / data_disks_per_row;
2222
2223                                 if (offload_to_mirror != current_group) {
2224                                         if (current_group <
2225                                                 layout_map_count - 1) {
2226                                                 /*
2227                                                  * Select raid index from
2228                                                  * next group.
2229                                                  */
2230                                                 map_index += data_disks_per_row;
2231                                                 current_group++;
2232                                         } else {
2233                                                 /*
2234                                                  * Select raid index from first
2235                                                  * group.
2236                                                  */
2237                                                 map_index %= data_disks_per_row;
2238                                                 current_group = 0;
2239                                         }
2240                                 }
2241                         } while (offload_to_mirror != current_group);
2242                 }
2243
2244                 /* Set mirror group to use next time. */
2245                 offload_to_mirror =
2246                         (offload_to_mirror >= layout_map_count - 1) ?
2247                                 0 : offload_to_mirror + 1;
2248                 WARN_ON(offload_to_mirror >= layout_map_count);
2249                 device->offload_to_mirror = offload_to_mirror;
2250                 /*
2251                  * Avoid direct use of device->offload_to_mirror within this
2252                  * function since multiple threads might simultaneously
2253                  * increment it beyond the range of device->layout_map_count -1.
2254                  */
2255         } else if ((device->raid_level == SA_RAID_5 ||
2256                 device->raid_level == SA_RAID_6) && layout_map_count > 1) {
2257                 /* RAID 50/60 */
2258                 /* Verify first and last block are in same RAID group */
2259                 r5or6_blocks_per_row = strip_size * data_disks_per_row;
2260                 stripesize = r5or6_blocks_per_row * layout_map_count;
2261 #if BITS_PER_LONG == 32
2262                 tmpdiv = first_block;
2263                 first_group = do_div(tmpdiv, stripesize);
2264                 tmpdiv = first_group;
2265                 do_div(tmpdiv, r5or6_blocks_per_row);
2266                 first_group = tmpdiv;
2267                 tmpdiv = last_block;
2268                 last_group = do_div(tmpdiv, stripesize);
2269                 tmpdiv = last_group;
2270                 do_div(tmpdiv, r5or6_blocks_per_row);
2271                 last_group = tmpdiv;
2272 #else
2273                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
2274                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
2275 #endif
2276                 if (first_group != last_group)
2277                         return PQI_RAID_BYPASS_INELIGIBLE;
2278
2279                 /* Verify request is in a single row of RAID 5/6 */
2280 #if BITS_PER_LONG == 32
2281                 tmpdiv = first_block;
2282                 do_div(tmpdiv, stripesize);
2283                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
2284                 tmpdiv = last_block;
2285                 do_div(tmpdiv, stripesize);
2286                 r5or6_last_row = r0_last_row = tmpdiv;
2287 #else
2288                 first_row = r5or6_first_row = r0_first_row =
2289                         first_block / stripesize;
2290                 r5or6_last_row = r0_last_row = last_block / stripesize;
2291 #endif
2292                 if (r5or6_first_row != r5or6_last_row)
2293                         return PQI_RAID_BYPASS_INELIGIBLE;
2294
2295                 /* Verify request is in a single column */
2296 #if BITS_PER_LONG == 32
2297                 tmpdiv = first_block;
2298                 first_row_offset = do_div(tmpdiv, stripesize);
2299                 tmpdiv = first_row_offset;
2300                 first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
2301                 r5or6_first_row_offset = first_row_offset;
2302                 tmpdiv = last_block;
2303                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
2304                 tmpdiv = r5or6_last_row_offset;
2305                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
2306                 tmpdiv = r5or6_first_row_offset;
2307                 do_div(tmpdiv, strip_size);
2308                 first_column = r5or6_first_column = tmpdiv;
2309                 tmpdiv = r5or6_last_row_offset;
2310                 do_div(tmpdiv, strip_size);
2311                 r5or6_last_column = tmpdiv;
2312 #else
2313                 first_row_offset = r5or6_first_row_offset =
2314                         (u32)((first_block % stripesize) %
2315                         r5or6_blocks_per_row);
2316
2317                 r5or6_last_row_offset =
2318                         (u32)((last_block % stripesize) %
2319                         r5or6_blocks_per_row);
2320
2321                 first_column = r5or6_first_row_offset / strip_size;
2322                 r5or6_first_column = first_column;
2323                 r5or6_last_column = r5or6_last_row_offset / strip_size;
2324 #endif
2325                 if (r5or6_first_column != r5or6_last_column)
2326                         return PQI_RAID_BYPASS_INELIGIBLE;
2327
2328                 /* Request is eligible */
2329                 map_row =
2330                         ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2331                         get_unaligned_le16(&raid_map->row_cnt);
2332
2333                 map_index = (first_group *
2334                         (get_unaligned_le16(&raid_map->row_cnt) *
2335                         total_disks_per_row)) +
2336                         (map_row * total_disks_per_row) + first_column;
2337         }
2338
2339         if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
2340                 return PQI_RAID_BYPASS_INELIGIBLE;
2341
2342         aio_handle = raid_map->disk_data[map_index].aio_handle;
2343         disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2344                 first_row * strip_size +
2345                 (first_row_offset - first_column * strip_size);
2346         disk_block_cnt = block_cnt;
2347
2348         /* Handle differing logical/physical block sizes. */
2349         if (raid_map->phys_blk_shift) {
2350                 disk_block <<= raid_map->phys_blk_shift;
2351                 disk_block_cnt <<= raid_map->phys_blk_shift;
2352         }
2353
2354         if (unlikely(disk_block_cnt > 0xffff))
2355                 return PQI_RAID_BYPASS_INELIGIBLE;
2356
2357         /* Build the new CDB for the physical disk I/O. */
2358         if (disk_block > 0xffffffff) {
2359                 cdb[0] = is_write ? WRITE_16 : READ_16;
2360                 cdb[1] = 0;
2361                 put_unaligned_be64(disk_block, &cdb[2]);
2362                 put_unaligned_be32(disk_block_cnt, &cdb[10]);
2363                 cdb[14] = 0;
2364                 cdb[15] = 0;
2365                 cdb_length = 16;
2366         } else {
2367                 cdb[0] = is_write ? WRITE_10 : READ_10;
2368                 cdb[1] = 0;
2369                 put_unaligned_be32((u32)disk_block, &cdb[2]);
2370                 cdb[6] = 0;
2371                 put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
2372                 cdb[9] = 0;
2373                 cdb_length = 10;
2374         }
2375
2376         if (get_unaligned_le16(&raid_map->flags) &
2377                 RAID_MAP_ENCRYPTION_ENABLED) {
2378                 pqi_set_encryption_info(&encryption_info, raid_map,
2379                         first_block);
2380                 encryption_info_ptr = &encryption_info;
2381         } else {
2382                 encryption_info_ptr = NULL;
2383         }
2384
2385         return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
2386                 cdb, cdb_length, queue_group, encryption_info_ptr, true);
2387 }
2388
2389 #define PQI_STATUS_IDLE         0x0
2390
2391 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
2392 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
2393
2394 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
2395 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
2396 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
2397 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
2398 #define PQI_DEVICE_STATE_ERROR                          0x4
2399
2400 #define PQI_MODE_READY_TIMEOUT_SECS             30
2401 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
2402
2403 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2404 {
2405         struct pqi_device_registers __iomem *pqi_registers;
2406         unsigned long timeout;
2407         u64 signature;
2408         u8 status;
2409
2410         pqi_registers = ctrl_info->pqi_registers;
2411         timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
2412
2413         while (1) {
2414                 signature = readq(&pqi_registers->signature);
2415                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2416                         sizeof(signature)) == 0)
2417                         break;
2418                 if (time_after(jiffies, timeout)) {
2419                         dev_err(&ctrl_info->pci_dev->dev,
2420                                 "timed out waiting for PQI signature\n");
2421                         return -ETIMEDOUT;
2422                 }
2423                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2424         }
2425
2426         while (1) {
2427                 status = readb(&pqi_registers->function_and_status_code);
2428                 if (status == PQI_STATUS_IDLE)
2429                         break;
2430                 if (time_after(jiffies, timeout)) {
2431                         dev_err(&ctrl_info->pci_dev->dev,
2432                                 "timed out waiting for PQI IDLE\n");
2433                         return -ETIMEDOUT;
2434                 }
2435                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2436         }
2437
2438         while (1) {
2439                 if (readl(&pqi_registers->device_status) ==
2440                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2441                         break;
2442                 if (time_after(jiffies, timeout)) {
2443                         dev_err(&ctrl_info->pci_dev->dev,
2444                                 "timed out waiting for PQI all registers ready\n");
2445                         return -ETIMEDOUT;
2446                 }
2447                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2448         }
2449
2450         return 0;
2451 }
2452
2453 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2454 {
2455         struct pqi_scsi_dev *device;
2456
2457         device = io_request->scmd->device->hostdata;
2458         device->raid_bypass_enabled = false;
2459         device->aio_enabled = false;
2460 }
2461
2462 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
2463 {
2464         struct pqi_ctrl_info *ctrl_info;
2465         struct pqi_scsi_dev *device;
2466
2467         device = sdev->hostdata;
2468         if (device->device_offline)
2469                 return;
2470
2471         device->device_offline = true;
2472         scsi_device_set_state(sdev, SDEV_OFFLINE);
2473         ctrl_info = shost_to_hba(sdev->host);
2474         pqi_schedule_rescan_worker(ctrl_info);
2475         dev_err(&ctrl_info->pci_dev->dev, "offlined %s scsi %d:%d:%d:%d\n",
2476                 path, ctrl_info->scsi_host->host_no, device->bus,
2477                 device->target, device->lun);
2478 }
2479
2480 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2481 {
2482         u8 scsi_status;
2483         u8 host_byte;
2484         struct scsi_cmnd *scmd;
2485         struct pqi_raid_error_info *error_info;
2486         size_t sense_data_length;
2487         int residual_count;
2488         int xfer_count;
2489         struct scsi_sense_hdr sshdr;
2490
2491         scmd = io_request->scmd;
2492         if (!scmd)
2493                 return;
2494
2495         error_info = io_request->error_info;
2496         scsi_status = error_info->status;
2497         host_byte = DID_OK;
2498
2499         switch (error_info->data_out_result) {
2500         case PQI_DATA_IN_OUT_GOOD:
2501                 break;
2502         case PQI_DATA_IN_OUT_UNDERFLOW:
2503                 xfer_count =
2504                         get_unaligned_le32(&error_info->data_out_transferred);
2505                 residual_count = scsi_bufflen(scmd) - xfer_count;
2506                 scsi_set_resid(scmd, residual_count);
2507                 if (xfer_count < scmd->underflow)
2508                         host_byte = DID_SOFT_ERROR;
2509                 break;
2510         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
2511         case PQI_DATA_IN_OUT_ABORTED:
2512                 host_byte = DID_ABORT;
2513                 break;
2514         case PQI_DATA_IN_OUT_TIMEOUT:
2515                 host_byte = DID_TIME_OUT;
2516                 break;
2517         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
2518         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
2519         case PQI_DATA_IN_OUT_BUFFER_ERROR:
2520         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
2521         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
2522         case PQI_DATA_IN_OUT_ERROR:
2523         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
2524         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
2525         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
2526         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
2527         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
2528         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
2529         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
2530         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
2531         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
2532         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
2533         default:
2534                 host_byte = DID_ERROR;
2535                 break;
2536         }
2537
2538         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2539         if (sense_data_length == 0)
2540                 sense_data_length =
2541                         get_unaligned_le16(&error_info->response_data_length);
2542         if (sense_data_length) {
2543                 if (sense_data_length > sizeof(error_info->data))
2544                         sense_data_length = sizeof(error_info->data);
2545
2546                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
2547                         scsi_normalize_sense(error_info->data,
2548                                 sense_data_length, &sshdr) &&
2549                                 sshdr.sense_key == HARDWARE_ERROR &&
2550                                 sshdr.asc == 0x3e &&
2551                                 sshdr.ascq == 0x1) {
2552                         pqi_take_device_offline(scmd->device, "RAID");
2553                         host_byte = DID_NO_CONNECT;
2554                 }
2555
2556                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2557                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
2558                 memcpy(scmd->sense_buffer, error_info->data,
2559                         sense_data_length);
2560         }
2561
2562         scmd->result = scsi_status;
2563         set_host_byte(scmd, host_byte);
2564 }
2565
2566 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
2567 {
2568         u8 scsi_status;
2569         u8 host_byte;
2570         struct scsi_cmnd *scmd;
2571         struct pqi_aio_error_info *error_info;
2572         size_t sense_data_length;
2573         int residual_count;
2574         int xfer_count;
2575         bool device_offline;
2576
2577         scmd = io_request->scmd;
2578         error_info = io_request->error_info;
2579         host_byte = DID_OK;
2580         sense_data_length = 0;
2581         device_offline = false;
2582
2583         switch (error_info->service_response) {
2584         case PQI_AIO_SERV_RESPONSE_COMPLETE:
2585                 scsi_status = error_info->status;
2586                 break;
2587         case PQI_AIO_SERV_RESPONSE_FAILURE:
2588                 switch (error_info->status) {
2589                 case PQI_AIO_STATUS_IO_ABORTED:
2590                         scsi_status = SAM_STAT_TASK_ABORTED;
2591                         break;
2592                 case PQI_AIO_STATUS_UNDERRUN:
2593                         scsi_status = SAM_STAT_GOOD;
2594                         residual_count = get_unaligned_le32(
2595                                                 &error_info->residual_count);
2596                         scsi_set_resid(scmd, residual_count);
2597                         xfer_count = scsi_bufflen(scmd) - residual_count;
2598                         if (xfer_count < scmd->underflow)
2599                                 host_byte = DID_SOFT_ERROR;
2600                         break;
2601                 case PQI_AIO_STATUS_OVERRUN:
2602                         scsi_status = SAM_STAT_GOOD;
2603                         break;
2604                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
2605                         pqi_aio_path_disabled(io_request);
2606                         scsi_status = SAM_STAT_GOOD;
2607                         io_request->status = -EAGAIN;
2608                         break;
2609                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
2610                 case PQI_AIO_STATUS_INVALID_DEVICE:
2611                         if (!io_request->raid_bypass) {
2612                                 device_offline = true;
2613                                 pqi_take_device_offline(scmd->device, "AIO");
2614                                 host_byte = DID_NO_CONNECT;
2615                         }
2616                         scsi_status = SAM_STAT_CHECK_CONDITION;
2617                         break;
2618                 case PQI_AIO_STATUS_IO_ERROR:
2619                 default:
2620                         scsi_status = SAM_STAT_CHECK_CONDITION;
2621                         break;
2622                 }
2623                 break;
2624         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
2625         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
2626                 scsi_status = SAM_STAT_GOOD;
2627                 break;
2628         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
2629         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
2630         default:
2631                 scsi_status = SAM_STAT_CHECK_CONDITION;
2632                 break;
2633         }
2634
2635         if (error_info->data_present) {
2636                 sense_data_length =
2637                         get_unaligned_le16(&error_info->data_length);
2638                 if (sense_data_length) {
2639                         if (sense_data_length > sizeof(error_info->data))
2640                                 sense_data_length = sizeof(error_info->data);
2641                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2642                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
2643                         memcpy(scmd->sense_buffer, error_info->data,
2644                                 sense_data_length);
2645                 }
2646         }
2647
2648         if (device_offline && sense_data_length == 0)
2649                 scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR,
2650                         0x3e, 0x1);
2651
2652         scmd->result = scsi_status;
2653         set_host_byte(scmd, host_byte);
2654 }
2655
2656 static void pqi_process_io_error(unsigned int iu_type,
2657         struct pqi_io_request *io_request)
2658 {
2659         switch (iu_type) {
2660         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2661                 pqi_process_raid_io_error(io_request);
2662                 break;
2663         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2664                 pqi_process_aio_io_error(io_request);
2665                 break;
2666         }
2667 }
2668
2669 static int pqi_interpret_task_management_response(
2670         struct pqi_task_management_response *response)
2671 {
2672         int rc;
2673
2674         switch (response->response_code) {
2675         case SOP_TMF_COMPLETE:
2676         case SOP_TMF_FUNCTION_SUCCEEDED:
2677                 rc = 0;
2678                 break;
2679         default:
2680                 rc = -EIO;
2681                 break;
2682         }
2683
2684         return rc;
2685 }
2686
2687 static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
2688         struct pqi_queue_group *queue_group)
2689 {
2690         unsigned int num_responses;
2691         pqi_index_t oq_pi;
2692         pqi_index_t oq_ci;
2693         struct pqi_io_request *io_request;
2694         struct pqi_io_response *response;
2695         u16 request_id;
2696
2697         num_responses = 0;
2698         oq_ci = queue_group->oq_ci_copy;
2699
2700         while (1) {
2701                 oq_pi = *queue_group->oq_pi;
2702                 if (oq_pi == oq_ci)
2703                         break;
2704
2705                 num_responses++;
2706                 response = queue_group->oq_element_array +
2707                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
2708
2709                 request_id = get_unaligned_le16(&response->request_id);
2710                 WARN_ON(request_id >= ctrl_info->max_io_slots);
2711
2712                 io_request = &ctrl_info->io_request_pool[request_id];
2713                 WARN_ON(atomic_read(&io_request->refcount) == 0);
2714
2715                 switch (response->header.iu_type) {
2716                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
2717                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
2718                         if (io_request->scmd)
2719                                 io_request->scmd->result = 0;
2720                         /* fall through */
2721                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
2722                         break;
2723                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
2724                         io_request->status =
2725                                 pqi_interpret_task_management_response(
2726                                         (void *)response);
2727                         break;
2728                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
2729                         pqi_aio_path_disabled(io_request);
2730                         io_request->status = -EAGAIN;
2731                         break;
2732                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2733                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2734                         io_request->error_info = ctrl_info->error_buffer +
2735                                 (get_unaligned_le16(&response->error_index) *
2736                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
2737                         pqi_process_io_error(response->header.iu_type,
2738                                 io_request);
2739                         break;
2740                 default:
2741                         dev_err(&ctrl_info->pci_dev->dev,
2742                                 "unexpected IU type: 0x%x\n",
2743                                 response->header.iu_type);
2744                         break;
2745                 }
2746
2747                 io_request->io_complete_callback(io_request,
2748                         io_request->context);
2749
2750                 /*
2751                  * Note that the I/O request structure CANNOT BE TOUCHED after
2752                  * returning from the I/O completion callback!
2753                  */
2754
2755                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
2756         }
2757
2758         if (num_responses) {
2759                 queue_group->oq_ci_copy = oq_ci;
2760                 writel(oq_ci, queue_group->oq_ci);
2761         }
2762
2763         return num_responses;
2764 }
2765
2766 static inline unsigned int pqi_num_elements_free(unsigned int pi,
2767         unsigned int ci, unsigned int elements_in_queue)
2768 {
2769         unsigned int num_elements_used;
2770
2771         if (pi >= ci)
2772                 num_elements_used = pi - ci;
2773         else
2774                 num_elements_used = elements_in_queue - ci + pi;
2775
2776         return elements_in_queue - num_elements_used - 1;
2777 }
2778
2779 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
2780         struct pqi_event_acknowledge_request *iu, size_t iu_length)
2781 {
2782         pqi_index_t iq_pi;
2783         pqi_index_t iq_ci;
2784         unsigned long flags;
2785         void *next_element;
2786         struct pqi_queue_group *queue_group;
2787
2788         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
2789         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
2790
2791         while (1) {
2792                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
2793
2794                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
2795                 iq_ci = *queue_group->iq_ci[RAID_PATH];
2796
2797                 if (pqi_num_elements_free(iq_pi, iq_ci,
2798                         ctrl_info->num_elements_per_iq))
2799                         break;
2800
2801                 spin_unlock_irqrestore(
2802                         &queue_group->submit_lock[RAID_PATH], flags);
2803
2804                 if (pqi_ctrl_offline(ctrl_info))
2805                         return;
2806         }
2807
2808         next_element = queue_group->iq_element_array[RAID_PATH] +
2809                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
2810
2811         memcpy(next_element, iu, iu_length);
2812
2813         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
2814         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
2815
2816         /*
2817          * This write notifies the controller that an IU is available to be
2818          * processed.
2819          */
2820         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
2821
2822         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
2823 }
2824
2825 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
2826         struct pqi_event *event)
2827 {
2828         struct pqi_event_acknowledge_request request;
2829
2830         memset(&request, 0, sizeof(request));
2831
2832         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
2833         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
2834                 &request.header.iu_length);
2835         request.event_type = event->event_type;
2836         request.event_id = event->event_id;
2837         request.additional_event_id = event->additional_event_id;
2838
2839         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
2840 }
2841
2842 static void pqi_event_worker(struct work_struct *work)
2843 {
2844         unsigned int i;
2845         struct pqi_ctrl_info *ctrl_info;
2846         struct pqi_event *event;
2847
2848         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
2849
2850         pqi_ctrl_busy(ctrl_info);
2851         pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
2852         if (pqi_ctrl_offline(ctrl_info))
2853                 goto out;
2854
2855         pqi_schedule_rescan_worker_delayed(ctrl_info);
2856
2857         event = ctrl_info->events;
2858         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
2859                 if (event->pending) {
2860                         event->pending = false;
2861                         pqi_acknowledge_event(ctrl_info, event);
2862                 }
2863                 event++;
2864         }
2865
2866 out:
2867         pqi_ctrl_unbusy(ctrl_info);
2868 }
2869
2870 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * HZ)
2871
2872 static void pqi_heartbeat_timer_handler(unsigned long data)
2873 {
2874         int num_interrupts;
2875         u32 heartbeat_count;
2876         struct pqi_ctrl_info *ctrl_info = (struct pqi_ctrl_info *)data;
2877
2878         pqi_check_ctrl_health(ctrl_info);
2879         if (pqi_ctrl_offline(ctrl_info))
2880                 return;
2881
2882         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
2883         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
2884
2885         if (num_interrupts == ctrl_info->previous_num_interrupts) {
2886                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
2887                         dev_err(&ctrl_info->pci_dev->dev,
2888                                 "no heartbeat detected - last heartbeat count: %u\n",
2889                                 heartbeat_count);
2890                         pqi_take_ctrl_offline(ctrl_info);
2891                         return;
2892                 }
2893         } else {
2894                 ctrl_info->previous_num_interrupts = num_interrupts;
2895         }
2896
2897         ctrl_info->previous_heartbeat_count = heartbeat_count;
2898         mod_timer(&ctrl_info->heartbeat_timer,
2899                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
2900 }
2901
2902 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2903 {
2904         if (!ctrl_info->heartbeat_counter)
2905                 return;
2906
2907         ctrl_info->previous_num_interrupts =
2908                 atomic_read(&ctrl_info->num_interrupts);
2909         ctrl_info->previous_heartbeat_count =
2910                 pqi_read_heartbeat_counter(ctrl_info);
2911
2912         ctrl_info->heartbeat_timer.expires =
2913                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
2914         ctrl_info->heartbeat_timer.data = (unsigned long)ctrl_info;
2915         ctrl_info->heartbeat_timer.function = pqi_heartbeat_timer_handler;
2916         add_timer(&ctrl_info->heartbeat_timer);
2917 }
2918
2919 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2920 {
2921         del_timer_sync(&ctrl_info->heartbeat_timer);
2922 }
2923
2924 static inline int pqi_event_type_to_event_index(unsigned int event_type)
2925 {
2926         int index;
2927
2928         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
2929                 if (event_type == pqi_supported_event_types[index])
2930                         return index;
2931
2932         return -1;
2933 }
2934
2935 static inline bool pqi_is_supported_event(unsigned int event_type)
2936 {
2937         return pqi_event_type_to_event_index(event_type) != -1;
2938 }
2939
2940 static unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
2941 {
2942         unsigned int num_events;
2943         pqi_index_t oq_pi;
2944         pqi_index_t oq_ci;
2945         struct pqi_event_queue *event_queue;
2946         struct pqi_event_response *response;
2947         struct pqi_event *event;
2948         int event_index;
2949
2950         event_queue = &ctrl_info->event_queue;
2951         num_events = 0;
2952         oq_ci = event_queue->oq_ci_copy;
2953
2954         while (1) {
2955                 oq_pi = *event_queue->oq_pi;
2956                 if (oq_pi == oq_ci)
2957                         break;
2958
2959                 num_events++;
2960                 response = event_queue->oq_element_array +
2961                         (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
2962
2963                 event_index =
2964                         pqi_event_type_to_event_index(response->event_type);
2965
2966                 if (event_index >= 0) {
2967                         if (response->request_acknowlege) {
2968                                 event = &ctrl_info->events[event_index];
2969                                 event->pending = true;
2970                                 event->event_type = response->event_type;
2971                                 event->event_id = response->event_id;
2972                                 event->additional_event_id =
2973                                         response->additional_event_id;
2974                         }
2975                 }
2976
2977                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
2978         }
2979
2980         if (num_events) {
2981                 event_queue->oq_ci_copy = oq_ci;
2982                 writel(oq_ci, event_queue->oq_ci);
2983                 schedule_work(&ctrl_info->event_work);
2984         }
2985
2986         return num_events;
2987 }
2988
2989 #define PQI_LEGACY_INTX_MASK    0x1
2990
2991 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info,
2992                                                 bool enable_intx)
2993 {
2994         u32 intx_mask;
2995         struct pqi_device_registers __iomem *pqi_registers;
2996         volatile void __iomem *register_addr;
2997
2998         pqi_registers = ctrl_info->pqi_registers;
2999
3000         if (enable_intx)
3001                 register_addr = &pqi_registers->legacy_intx_mask_clear;
3002         else
3003                 register_addr = &pqi_registers->legacy_intx_mask_set;
3004
3005         intx_mask = readl(register_addr);
3006         intx_mask |= PQI_LEGACY_INTX_MASK;
3007         writel(intx_mask, register_addr);
3008 }
3009
3010 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3011         enum pqi_irq_mode new_mode)
3012 {
3013         switch (ctrl_info->irq_mode) {
3014         case IRQ_MODE_MSIX:
3015                 switch (new_mode) {
3016                 case IRQ_MODE_MSIX:
3017                         break;
3018                 case IRQ_MODE_INTX:
3019                         pqi_configure_legacy_intx(ctrl_info, true);
3020                         sis_enable_intx(ctrl_info);
3021                         break;
3022                 case IRQ_MODE_NONE:
3023                         break;
3024                 }
3025                 break;
3026         case IRQ_MODE_INTX:
3027                 switch (new_mode) {
3028                 case IRQ_MODE_MSIX:
3029                         pqi_configure_legacy_intx(ctrl_info, false);
3030                         sis_enable_msix(ctrl_info);
3031                         break;
3032                 case IRQ_MODE_INTX:
3033                         break;
3034                 case IRQ_MODE_NONE:
3035                         pqi_configure_legacy_intx(ctrl_info, false);
3036                         break;
3037                 }
3038                 break;
3039         case IRQ_MODE_NONE:
3040                 switch (new_mode) {
3041                 case IRQ_MODE_MSIX:
3042                         sis_enable_msix(ctrl_info);
3043                         break;
3044                 case IRQ_MODE_INTX:
3045                         pqi_configure_legacy_intx(ctrl_info, true);
3046                         sis_enable_intx(ctrl_info);
3047                         break;
3048                 case IRQ_MODE_NONE:
3049                         break;
3050                 }
3051                 break;
3052         }
3053
3054         ctrl_info->irq_mode = new_mode;
3055 }
3056
3057 #define PQI_LEGACY_INTX_PENDING         0x1
3058
3059 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3060 {
3061         bool valid_irq;
3062         u32 intx_status;
3063
3064         switch (ctrl_info->irq_mode) {
3065         case IRQ_MODE_MSIX:
3066                 valid_irq = true;
3067                 break;
3068         case IRQ_MODE_INTX:
3069                 intx_status =
3070                         readl(&ctrl_info->pqi_registers->legacy_intx_status);
3071                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3072                         valid_irq = true;
3073                 else
3074                         valid_irq = false;
3075                 break;
3076         case IRQ_MODE_NONE:
3077         default:
3078                 valid_irq = false;
3079                 break;
3080         }
3081
3082         return valid_irq;
3083 }
3084
3085 static irqreturn_t pqi_irq_handler(int irq, void *data)
3086 {
3087         struct pqi_ctrl_info *ctrl_info;
3088         struct pqi_queue_group *queue_group;
3089         unsigned int num_responses_handled;
3090
3091         queue_group = data;
3092         ctrl_info = queue_group->ctrl_info;
3093
3094         if (!pqi_is_valid_irq(ctrl_info))
3095                 return IRQ_NONE;
3096
3097         num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3098
3099         if (irq == ctrl_info->event_irq)
3100                 num_responses_handled += pqi_process_event_intr(ctrl_info);
3101
3102         if (num_responses_handled)
3103                 atomic_inc(&ctrl_info->num_interrupts);
3104
3105         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3106         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3107
3108         return IRQ_HANDLED;
3109 }
3110
3111 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3112 {
3113         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3114         int i;
3115         int rc;
3116
3117         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3118
3119         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3120                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3121                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3122                 if (rc) {
3123                         dev_err(&pci_dev->dev,
3124                                 "irq %u init failed with error %d\n",
3125                                 pci_irq_vector(pci_dev, i), rc);
3126                         return rc;
3127                 }
3128                 ctrl_info->num_msix_vectors_initialized++;
3129         }
3130
3131         return 0;
3132 }
3133
3134 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3135 {
3136         int i;
3137
3138         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3139                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3140                         &ctrl_info->queue_groups[i]);
3141
3142         ctrl_info->num_msix_vectors_initialized = 0;
3143 }
3144
3145 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3146 {
3147         int num_vectors_enabled;
3148
3149         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3150                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3151                         PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3152         if (num_vectors_enabled < 0) {
3153                 dev_err(&ctrl_info->pci_dev->dev,
3154                         "MSI-X init failed with error %d\n",
3155                         num_vectors_enabled);
3156                 return num_vectors_enabled;
3157         }
3158
3159         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
3160         ctrl_info->irq_mode = IRQ_MODE_MSIX;
3161         return 0;
3162 }
3163
3164 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3165 {
3166         if (ctrl_info->num_msix_vectors_enabled) {
3167                 pci_free_irq_vectors(ctrl_info->pci_dev);
3168                 ctrl_info->num_msix_vectors_enabled = 0;
3169         }
3170 }
3171
3172 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
3173 {
3174         unsigned int i;
3175         size_t alloc_length;
3176         size_t element_array_length_per_iq;
3177         size_t element_array_length_per_oq;
3178         void *element_array;
3179         void *next_queue_index;
3180         void *aligned_pointer;
3181         unsigned int num_inbound_queues;
3182         unsigned int num_outbound_queues;
3183         unsigned int num_queue_indexes;
3184         struct pqi_queue_group *queue_group;
3185
3186         element_array_length_per_iq =
3187                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
3188                 ctrl_info->num_elements_per_iq;
3189         element_array_length_per_oq =
3190                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
3191                 ctrl_info->num_elements_per_oq;
3192         num_inbound_queues = ctrl_info->num_queue_groups * 2;
3193         num_outbound_queues = ctrl_info->num_queue_groups;
3194         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3195
3196         aligned_pointer = NULL;
3197
3198         for (i = 0; i < num_inbound_queues; i++) {
3199                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3200                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3201                 aligned_pointer += element_array_length_per_iq;
3202         }
3203
3204         for (i = 0; i < num_outbound_queues; i++) {
3205                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3206                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3207                 aligned_pointer += element_array_length_per_oq;
3208         }
3209
3210         aligned_pointer = PTR_ALIGN(aligned_pointer,
3211                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3212         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3213                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3214
3215         for (i = 0; i < num_queue_indexes; i++) {
3216                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3217                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3218                 aligned_pointer += sizeof(pqi_index_t);
3219         }
3220
3221         alloc_length = (size_t)aligned_pointer +
3222                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3223
3224         alloc_length += PQI_EXTRA_SGL_MEMORY;
3225
3226         ctrl_info->queue_memory_base =
3227                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3228                         alloc_length,
3229                         &ctrl_info->queue_memory_base_dma_handle, GFP_KERNEL);
3230
3231         if (!ctrl_info->queue_memory_base)
3232                 return -ENOMEM;
3233
3234         ctrl_info->queue_memory_length = alloc_length;
3235
3236         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3237                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3238
3239         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3240                 queue_group = &ctrl_info->queue_groups[i];
3241                 queue_group->iq_element_array[RAID_PATH] = element_array;
3242                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
3243                         ctrl_info->queue_memory_base_dma_handle +
3244                                 (element_array - ctrl_info->queue_memory_base);
3245                 element_array += element_array_length_per_iq;
3246                 element_array = PTR_ALIGN(element_array,
3247                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3248                 queue_group->iq_element_array[AIO_PATH] = element_array;
3249                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
3250                         ctrl_info->queue_memory_base_dma_handle +
3251                         (element_array - ctrl_info->queue_memory_base);
3252                 element_array += element_array_length_per_iq;
3253                 element_array = PTR_ALIGN(element_array,
3254                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3255         }
3256
3257         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3258                 queue_group = &ctrl_info->queue_groups[i];
3259                 queue_group->oq_element_array = element_array;
3260                 queue_group->oq_element_array_bus_addr =
3261                         ctrl_info->queue_memory_base_dma_handle +
3262                         (element_array - ctrl_info->queue_memory_base);
3263                 element_array += element_array_length_per_oq;
3264                 element_array = PTR_ALIGN(element_array,
3265                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3266         }
3267
3268         ctrl_info->event_queue.oq_element_array = element_array;
3269         ctrl_info->event_queue.oq_element_array_bus_addr =
3270                 ctrl_info->queue_memory_base_dma_handle +
3271                 (element_array - ctrl_info->queue_memory_base);
3272         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3273                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3274
3275         next_queue_index = PTR_ALIGN(element_array,
3276                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
3277
3278         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3279                 queue_group = &ctrl_info->queue_groups[i];
3280                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
3281                 queue_group->iq_ci_bus_addr[RAID_PATH] =
3282                         ctrl_info->queue_memory_base_dma_handle +
3283                         (next_queue_index - ctrl_info->queue_memory_base);
3284                 next_queue_index += sizeof(pqi_index_t);
3285                 next_queue_index = PTR_ALIGN(next_queue_index,
3286                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3287                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
3288                 queue_group->iq_ci_bus_addr[AIO_PATH] =
3289                         ctrl_info->queue_memory_base_dma_handle +
3290                         (next_queue_index - ctrl_info->queue_memory_base);
3291                 next_queue_index += sizeof(pqi_index_t);
3292                 next_queue_index = PTR_ALIGN(next_queue_index,
3293                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3294                 queue_group->oq_pi = next_queue_index;
3295                 queue_group->oq_pi_bus_addr =
3296                         ctrl_info->queue_memory_base_dma_handle +
3297                         (next_queue_index - ctrl_info->queue_memory_base);
3298                 next_queue_index += sizeof(pqi_index_t);
3299                 next_queue_index = PTR_ALIGN(next_queue_index,
3300                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3301         }
3302
3303         ctrl_info->event_queue.oq_pi = next_queue_index;
3304         ctrl_info->event_queue.oq_pi_bus_addr =
3305                 ctrl_info->queue_memory_base_dma_handle +
3306                 (next_queue_index - ctrl_info->queue_memory_base);
3307
3308         return 0;
3309 }
3310
3311 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3312 {
3313         unsigned int i;
3314         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3315         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3316
3317         /*
3318          * Initialize the backpointers to the controller structure in
3319          * each operational queue group structure.
3320          */
3321         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3322                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
3323
3324         /*
3325          * Assign IDs to all operational queues.  Note that the IDs
3326          * assigned to operational IQs are independent of the IDs
3327          * assigned to operational OQs.
3328          */
3329         ctrl_info->event_queue.oq_id = next_oq_id++;
3330         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3331                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
3332                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
3333                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
3334         }
3335
3336         /*
3337          * Assign MSI-X table entry indexes to all queues.  Note that the
3338          * interrupt for the event queue is shared with the first queue group.
3339          */
3340         ctrl_info->event_queue.int_msg_num = 0;
3341         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3342                 ctrl_info->queue_groups[i].int_msg_num = i;
3343
3344         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3345                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
3346                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
3347                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
3348                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
3349         }
3350 }
3351
3352 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
3353 {
3354         size_t alloc_length;
3355         struct pqi_admin_queues_aligned *admin_queues_aligned;
3356         struct pqi_admin_queues *admin_queues;
3357
3358         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
3359                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3360
3361         ctrl_info->admin_queue_memory_base =
3362                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3363                         alloc_length,
3364                         &ctrl_info->admin_queue_memory_base_dma_handle,
3365                         GFP_KERNEL);
3366
3367         if (!ctrl_info->admin_queue_memory_base)
3368                 return -ENOMEM;
3369
3370         ctrl_info->admin_queue_memory_length = alloc_length;
3371
3372         admin_queues = &ctrl_info->admin_queues;
3373         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
3374                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3375         admin_queues->iq_element_array =
3376                 &admin_queues_aligned->iq_element_array;
3377         admin_queues->oq_element_array =
3378                 &admin_queues_aligned->oq_element_array;
3379         admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
3380         admin_queues->oq_pi = &admin_queues_aligned->oq_pi;
3381
3382         admin_queues->iq_element_array_bus_addr =
3383                 ctrl_info->admin_queue_memory_base_dma_handle +
3384                 (admin_queues->iq_element_array -
3385                 ctrl_info->admin_queue_memory_base);
3386         admin_queues->oq_element_array_bus_addr =
3387                 ctrl_info->admin_queue_memory_base_dma_handle +
3388                 (admin_queues->oq_element_array -
3389                 ctrl_info->admin_queue_memory_base);
3390         admin_queues->iq_ci_bus_addr =
3391                 ctrl_info->admin_queue_memory_base_dma_handle +
3392                 ((void *)admin_queues->iq_ci -
3393                 ctrl_info->admin_queue_memory_base);
3394         admin_queues->oq_pi_bus_addr =
3395                 ctrl_info->admin_queue_memory_base_dma_handle +
3396                 ((void *)admin_queues->oq_pi -
3397                 ctrl_info->admin_queue_memory_base);
3398
3399         return 0;
3400 }
3401
3402 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          HZ
3403 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
3404
3405 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
3406 {
3407         struct pqi_device_registers __iomem *pqi_registers;
3408         struct pqi_admin_queues *admin_queues;
3409         unsigned long timeout;
3410         u8 status;
3411         u32 reg;
3412
3413         pqi_registers = ctrl_info->pqi_registers;
3414         admin_queues = &ctrl_info->admin_queues;
3415
3416         writeq((u64)admin_queues->iq_element_array_bus_addr,
3417                 &pqi_registers->admin_iq_element_array_addr);
3418         writeq((u64)admin_queues->oq_element_array_bus_addr,
3419                 &pqi_registers->admin_oq_element_array_addr);
3420         writeq((u64)admin_queues->iq_ci_bus_addr,
3421                 &pqi_registers->admin_iq_ci_addr);
3422         writeq((u64)admin_queues->oq_pi_bus_addr,
3423                 &pqi_registers->admin_oq_pi_addr);
3424
3425         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
3426                 (PQI_ADMIN_OQ_NUM_ELEMENTS) << 8 |
3427                 (admin_queues->int_msg_num << 16);
3428         writel(reg, &pqi_registers->admin_iq_num_elements);
3429         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
3430                 &pqi_registers->function_and_status_code);
3431
3432         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
3433         while (1) {
3434                 status = readb(&pqi_registers->function_and_status_code);
3435                 if (status == PQI_STATUS_IDLE)
3436                         break;
3437                 if (time_after(jiffies, timeout))
3438                         return -ETIMEDOUT;
3439                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
3440         }
3441
3442         /*
3443          * The offset registers are not initialized to the correct
3444          * offsets until *after* the create admin queue pair command
3445          * completes successfully.
3446          */
3447         admin_queues->iq_pi = ctrl_info->iomem_base +
3448                 PQI_DEVICE_REGISTERS_OFFSET +
3449                 readq(&pqi_registers->admin_iq_pi_offset);
3450         admin_queues->oq_ci = ctrl_info->iomem_base +
3451                 PQI_DEVICE_REGISTERS_OFFSET +
3452                 readq(&pqi_registers->admin_oq_ci_offset);
3453
3454         return 0;
3455 }
3456
3457 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
3458         struct pqi_general_admin_request *request)
3459 {
3460         struct pqi_admin_queues *admin_queues;
3461         void *next_element;
3462         pqi_index_t iq_pi;
3463
3464         admin_queues = &ctrl_info->admin_queues;
3465         iq_pi = admin_queues->iq_pi_copy;
3466
3467         next_element = admin_queues->iq_element_array +
3468                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
3469
3470         memcpy(next_element, request, sizeof(*request));
3471
3472         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
3473         admin_queues->iq_pi_copy = iq_pi;
3474
3475         /*
3476          * This write notifies the controller that an IU is available to be
3477          * processed.
3478          */
3479         writel(iq_pi, admin_queues->iq_pi);
3480 }
3481
3482 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
3483
3484 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
3485         struct pqi_general_admin_response *response)
3486 {
3487         struct pqi_admin_queues *admin_queues;
3488         pqi_index_t oq_pi;
3489         pqi_index_t oq_ci;
3490         unsigned long timeout;
3491
3492         admin_queues = &ctrl_info->admin_queues;
3493         oq_ci = admin_queues->oq_ci_copy;
3494
3495         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * HZ) + jiffies;
3496
3497         while (1) {
3498                 oq_pi = *admin_queues->oq_pi;
3499                 if (oq_pi != oq_ci)
3500                         break;
3501                 if (time_after(jiffies, timeout)) {
3502                         dev_err(&ctrl_info->pci_dev->dev,
3503                                 "timed out waiting for admin response\n");
3504                         return -ETIMEDOUT;
3505                 }
3506                 if (!sis_is_firmware_running(ctrl_info))
3507                         return -ENXIO;
3508                 usleep_range(1000, 2000);
3509         }
3510
3511         memcpy(response, admin_queues->oq_element_array +
3512                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
3513
3514         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
3515         admin_queues->oq_ci_copy = oq_ci;
3516         writel(oq_ci, admin_queues->oq_ci);
3517
3518         return 0;
3519 }
3520
3521 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
3522         struct pqi_queue_group *queue_group, enum pqi_io_path path,
3523         struct pqi_io_request *io_request)
3524 {
3525         struct pqi_io_request *next;
3526         void *next_element;
3527         pqi_index_t iq_pi;
3528         pqi_index_t iq_ci;
3529         size_t iu_length;
3530         unsigned long flags;
3531         unsigned int num_elements_needed;
3532         unsigned int num_elements_to_end_of_queue;
3533         size_t copy_count;
3534         struct pqi_iu_header *request;
3535
3536         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
3537
3538         if (io_request) {
3539                 io_request->queue_group = queue_group;
3540                 list_add_tail(&io_request->request_list_entry,
3541                         &queue_group->request_list[path]);
3542         }
3543
3544         iq_pi = queue_group->iq_pi_copy[path];
3545
3546         list_for_each_entry_safe(io_request, next,
3547                 &queue_group->request_list[path], request_list_entry) {
3548
3549                 request = io_request->iu;
3550
3551                 iu_length = get_unaligned_le16(&request->iu_length) +
3552                         PQI_REQUEST_HEADER_LENGTH;
3553                 num_elements_needed =
3554                         DIV_ROUND_UP(iu_length,
3555                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3556
3557                 iq_ci = *queue_group->iq_ci[path];
3558
3559                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
3560                         ctrl_info->num_elements_per_iq))
3561                         break;
3562
3563                 put_unaligned_le16(queue_group->oq_id,
3564                         &request->response_queue_id);
3565
3566                 next_element = queue_group->iq_element_array[path] +
3567                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3568
3569                 num_elements_to_end_of_queue =
3570                         ctrl_info->num_elements_per_iq - iq_pi;
3571
3572                 if (num_elements_needed <= num_elements_to_end_of_queue) {
3573                         memcpy(next_element, request, iu_length);
3574                 } else {
3575                         copy_count = num_elements_to_end_of_queue *
3576                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
3577                         memcpy(next_element, request, copy_count);
3578                         memcpy(queue_group->iq_element_array[path],
3579                                 (u8 *)request + copy_count,
3580                                 iu_length - copy_count);
3581                 }
3582
3583                 iq_pi = (iq_pi + num_elements_needed) %
3584                         ctrl_info->num_elements_per_iq;
3585
3586                 list_del(&io_request->request_list_entry);
3587         }
3588
3589         if (iq_pi != queue_group->iq_pi_copy[path]) {
3590                 queue_group->iq_pi_copy[path] = iq_pi;
3591                 /*
3592                  * This write notifies the controller that one or more IUs are
3593                  * available to be processed.
3594                  */
3595                 writel(iq_pi, queue_group->iq_pi[path]);
3596         }
3597
3598         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
3599 }
3600
3601 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
3602
3603 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
3604         struct completion *wait)
3605 {
3606         int rc;
3607
3608         while (1) {
3609                 if (wait_for_completion_io_timeout(wait,
3610                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * HZ)) {
3611                         rc = 0;
3612                         break;
3613                 }
3614
3615                 pqi_check_ctrl_health(ctrl_info);
3616                 if (pqi_ctrl_offline(ctrl_info)) {
3617                         rc = -ENXIO;
3618                         break;
3619                 }
3620         }
3621
3622         return rc;
3623 }
3624
3625 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
3626         void *context)
3627 {
3628         struct completion *waiting = context;
3629
3630         complete(waiting);
3631 }
3632
3633 static int pqi_submit_raid_request_synchronous_with_io_request(
3634         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
3635         unsigned long timeout_msecs)
3636 {
3637         int rc = 0;
3638         DECLARE_COMPLETION_ONSTACK(wait);
3639
3640         io_request->io_complete_callback = pqi_raid_synchronous_complete;
3641         io_request->context = &wait;
3642
3643         pqi_start_io(ctrl_info,
3644                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
3645                 io_request);
3646
3647         if (timeout_msecs == NO_TIMEOUT) {
3648                 pqi_wait_for_completion_io(ctrl_info, &wait);
3649         } else {
3650                 if (!wait_for_completion_io_timeout(&wait,
3651                         msecs_to_jiffies(timeout_msecs))) {
3652                         dev_warn(&ctrl_info->pci_dev->dev,
3653                                 "command timed out\n");
3654                         rc = -ETIMEDOUT;
3655                 }
3656         }
3657
3658         return rc;
3659 }
3660
3661 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
3662         struct pqi_iu_header *request, unsigned int flags,
3663         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
3664 {
3665         int rc;
3666         struct pqi_io_request *io_request;
3667         unsigned long start_jiffies;
3668         unsigned long msecs_blocked;
3669         size_t iu_length;
3670
3671         /*
3672          * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
3673          * are mutually exclusive.
3674          */
3675
3676         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
3677                 if (down_interruptible(&ctrl_info->sync_request_sem))
3678                         return -ERESTARTSYS;
3679         } else {
3680                 if (timeout_msecs == NO_TIMEOUT) {
3681                         down(&ctrl_info->sync_request_sem);
3682                 } else {
3683                         start_jiffies = jiffies;
3684                         if (down_timeout(&ctrl_info->sync_request_sem,
3685                                 msecs_to_jiffies(timeout_msecs)))
3686                                 return -ETIMEDOUT;
3687                         msecs_blocked =
3688                                 jiffies_to_msecs(jiffies - start_jiffies);
3689                         if (msecs_blocked >= timeout_msecs) {
3690                                 rc = -ETIMEDOUT;
3691                                 goto out;
3692                         }
3693                         timeout_msecs -= msecs_blocked;
3694                 }
3695         }
3696
3697         pqi_ctrl_busy(ctrl_info);
3698         timeout_msecs = pqi_wait_if_ctrl_blocked(ctrl_info, timeout_msecs);
3699         if (timeout_msecs == 0) {
3700                 rc = -ETIMEDOUT;
3701                 goto out;
3702         }
3703
3704         if (pqi_ctrl_offline(ctrl_info)) {
3705                 rc = -ENXIO;
3706                 goto out;
3707         }
3708
3709         io_request = pqi_alloc_io_request(ctrl_info);
3710
3711         put_unaligned_le16(io_request->index,
3712                 &(((struct pqi_raid_path_request *)request)->request_id));
3713
3714         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
3715                 ((struct pqi_raid_path_request *)request)->error_index =
3716                         ((struct pqi_raid_path_request *)request)->request_id;
3717
3718         iu_length = get_unaligned_le16(&request->iu_length) +
3719                 PQI_REQUEST_HEADER_LENGTH;
3720         memcpy(io_request->iu, request, iu_length);
3721
3722         rc = pqi_submit_raid_request_synchronous_with_io_request(ctrl_info,
3723                 io_request, timeout_msecs);
3724
3725         if (error_info) {
3726                 if (io_request->error_info)
3727                         memcpy(error_info, io_request->error_info,
3728                                 sizeof(*error_info));
3729                 else
3730                         memset(error_info, 0, sizeof(*error_info));
3731         } else if (rc == 0 && io_request->error_info) {
3732                 u8 scsi_status;
3733                 struct pqi_raid_error_info *raid_error_info;
3734
3735                 raid_error_info = io_request->error_info;
3736                 scsi_status = raid_error_info->status;
3737
3738                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3739                         raid_error_info->data_out_result ==
3740                         PQI_DATA_IN_OUT_UNDERFLOW)
3741                         scsi_status = SAM_STAT_GOOD;
3742
3743                 if (scsi_status != SAM_STAT_GOOD)
3744                         rc = -EIO;
3745         }
3746
3747         pqi_free_io_request(io_request);
3748
3749 out:
3750         pqi_ctrl_unbusy(ctrl_info);
3751         up(&ctrl_info->sync_request_sem);
3752
3753         return rc;
3754 }
3755
3756 static int pqi_validate_admin_response(
3757         struct pqi_general_admin_response *response, u8 expected_function_code)
3758 {
3759         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
3760                 return -EINVAL;
3761
3762         if (get_unaligned_le16(&response->header.iu_length) !=
3763                 PQI_GENERAL_ADMIN_IU_LENGTH)
3764                 return -EINVAL;
3765
3766         if (response->function_code != expected_function_code)
3767                 return -EINVAL;
3768
3769         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
3770                 return -EINVAL;
3771
3772         return 0;
3773 }
3774
3775 static int pqi_submit_admin_request_synchronous(
3776         struct pqi_ctrl_info *ctrl_info,
3777         struct pqi_general_admin_request *request,
3778         struct pqi_general_admin_response *response)
3779 {
3780         int rc;
3781
3782         pqi_submit_admin_request(ctrl_info, request);
3783
3784         rc = pqi_poll_for_admin_response(ctrl_info, response);
3785
3786         if (rc == 0)
3787                 rc = pqi_validate_admin_response(response,
3788                         request->function_code);
3789
3790         return rc;
3791 }
3792
3793 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
3794 {
3795         int rc;
3796         struct pqi_general_admin_request request;
3797         struct pqi_general_admin_response response;
3798         struct pqi_device_capability *capability;
3799         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
3800
3801         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
3802         if (!capability)
3803                 return -ENOMEM;
3804
3805         memset(&request, 0, sizeof(request));
3806
3807         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3808         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3809                 &request.header.iu_length);
3810         request.function_code =
3811                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
3812         put_unaligned_le32(sizeof(*capability),
3813                 &request.data.report_device_capability.buffer_length);
3814
3815         rc = pqi_map_single(ctrl_info->pci_dev,
3816                 &request.data.report_device_capability.sg_descriptor,
3817                 capability, sizeof(*capability),
3818                 PCI_DMA_FROMDEVICE);
3819         if (rc)
3820                 goto out;
3821
3822         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3823                 &response);
3824
3825         pqi_pci_unmap(ctrl_info->pci_dev,
3826                 &request.data.report_device_capability.sg_descriptor, 1,
3827                 PCI_DMA_FROMDEVICE);
3828
3829         if (rc)
3830                 goto out;
3831
3832         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
3833                 rc = -EIO;
3834                 goto out;
3835         }
3836
3837         ctrl_info->max_inbound_queues =
3838                 get_unaligned_le16(&capability->max_inbound_queues);
3839         ctrl_info->max_elements_per_iq =
3840                 get_unaligned_le16(&capability->max_elements_per_iq);
3841         ctrl_info->max_iq_element_length =
3842                 get_unaligned_le16(&capability->max_iq_element_length)
3843                 * 16;
3844         ctrl_info->max_outbound_queues =
3845                 get_unaligned_le16(&capability->max_outbound_queues);
3846         ctrl_info->max_elements_per_oq =
3847                 get_unaligned_le16(&capability->max_elements_per_oq);
3848         ctrl_info->max_oq_element_length =
3849                 get_unaligned_le16(&capability->max_oq_element_length)
3850                 * 16;
3851
3852         sop_iu_layer_descriptor =
3853                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
3854
3855         ctrl_info->max_inbound_iu_length_per_firmware =
3856                 get_unaligned_le16(
3857                         &sop_iu_layer_descriptor->max_inbound_iu_length);
3858         ctrl_info->inbound_spanning_supported =
3859                 sop_iu_layer_descriptor->inbound_spanning_supported;
3860         ctrl_info->outbound_spanning_supported =
3861                 sop_iu_layer_descriptor->outbound_spanning_supported;
3862
3863 out:
3864         kfree(capability);
3865
3866         return rc;
3867 }
3868
3869 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
3870 {
3871         if (ctrl_info->max_iq_element_length <
3872                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3873                 dev_err(&ctrl_info->pci_dev->dev,
3874                         "max. inbound queue element length of %d is less than the required length of %d\n",
3875                         ctrl_info->max_iq_element_length,
3876                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3877                 return -EINVAL;
3878         }
3879
3880         if (ctrl_info->max_oq_element_length <
3881                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
3882                 dev_err(&ctrl_info->pci_dev->dev,
3883                         "max. outbound queue element length of %d is less than the required length of %d\n",
3884                         ctrl_info->max_oq_element_length,
3885                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3886                 return -EINVAL;
3887         }
3888
3889         if (ctrl_info->max_inbound_iu_length_per_firmware <
3890                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3891                 dev_err(&ctrl_info->pci_dev->dev,
3892                         "max. inbound IU length of %u is less than the min. required length of %d\n",
3893                         ctrl_info->max_inbound_iu_length_per_firmware,
3894                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3895                 return -EINVAL;
3896         }
3897
3898         if (!ctrl_info->inbound_spanning_supported) {
3899                 dev_err(&ctrl_info->pci_dev->dev,
3900                         "the controller does not support inbound spanning\n");
3901                 return -EINVAL;
3902         }
3903
3904         if (ctrl_info->outbound_spanning_supported) {
3905                 dev_err(&ctrl_info->pci_dev->dev,
3906                         "the controller supports outbound spanning but this driver does not\n");
3907                 return -EINVAL;
3908         }
3909
3910         return 0;
3911 }
3912
3913 static int pqi_delete_operational_queue(struct pqi_ctrl_info *ctrl_info,
3914         bool inbound_queue, u16 queue_id)
3915 {
3916         struct pqi_general_admin_request request;
3917         struct pqi_general_admin_response response;
3918
3919         memset(&request, 0, sizeof(request));
3920         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3921         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3922                 &request.header.iu_length);
3923         if (inbound_queue)
3924                 request.function_code =
3925                         PQI_GENERAL_ADMIN_FUNCTION_DELETE_IQ;
3926         else
3927                 request.function_code =
3928                         PQI_GENERAL_ADMIN_FUNCTION_DELETE_OQ;
3929         put_unaligned_le16(queue_id,
3930                 &request.data.delete_operational_queue.queue_id);
3931
3932         return pqi_submit_admin_request_synchronous(ctrl_info, &request,
3933                 &response);
3934 }
3935
3936 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
3937 {
3938         int rc;
3939         struct pqi_event_queue *event_queue;
3940         struct pqi_general_admin_request request;
3941         struct pqi_general_admin_response response;
3942
3943         event_queue = &ctrl_info->event_queue;
3944
3945         /*
3946          * Create OQ (Outbound Queue - device to host queue) to dedicate
3947          * to events.
3948          */
3949         memset(&request, 0, sizeof(request));
3950         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3951         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3952                 &request.header.iu_length);
3953         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
3954         put_unaligned_le16(event_queue->oq_id,
3955                 &request.data.create_operational_oq.queue_id);
3956         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
3957                 &request.data.create_operational_oq.element_array_addr);
3958         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
3959                 &request.data.create_operational_oq.pi_addr);
3960         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
3961                 &request.data.create_operational_oq.num_elements);
3962         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
3963                 &request.data.create_operational_oq.element_length);
3964         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
3965         put_unaligned_le16(event_queue->int_msg_num,
3966                 &request.data.create_operational_oq.int_msg_num);
3967
3968         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3969                 &response);
3970         if (rc)
3971                 return rc;
3972
3973         event_queue->oq_ci = ctrl_info->iomem_base +
3974                 PQI_DEVICE_REGISTERS_OFFSET +
3975                 get_unaligned_le64(
3976                         &response.data.create_operational_oq.oq_ci_offset);
3977
3978         return 0;
3979 }
3980
3981 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
3982         unsigned int group_number)
3983 {
3984         int rc;
3985         struct pqi_queue_group *queue_group;
3986         struct pqi_general_admin_request request;
3987         struct pqi_general_admin_response response;
3988
3989         queue_group = &ctrl_info->queue_groups[group_number];
3990
3991         /*
3992          * Create IQ (Inbound Queue - host to device queue) for
3993          * RAID path.
3994          */
3995         memset(&request, 0, sizeof(request));
3996         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3997         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3998                 &request.header.iu_length);
3999         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4000         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
4001                 &request.data.create_operational_iq.queue_id);
4002         put_unaligned_le64(
4003                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
4004                 &request.data.create_operational_iq.element_array_addr);
4005         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
4006                 &request.data.create_operational_iq.ci_addr);
4007         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4008                 &request.data.create_operational_iq.num_elements);
4009         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4010                 &request.data.create_operational_iq.element_length);
4011         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4012
4013         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4014                 &response);
4015         if (rc) {
4016                 dev_err(&ctrl_info->pci_dev->dev,
4017                         "error creating inbound RAID queue\n");
4018                 return rc;
4019         }
4020
4021         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4022                 PQI_DEVICE_REGISTERS_OFFSET +
4023                 get_unaligned_le64(
4024                         &response.data.create_operational_iq.iq_pi_offset);
4025
4026         /*
4027          * Create IQ (Inbound Queue - host to device queue) for
4028          * Advanced I/O (AIO) path.
4029          */
4030         memset(&request, 0, sizeof(request));
4031         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4032         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4033                 &request.header.iu_length);
4034         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4035         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4036                 &request.data.create_operational_iq.queue_id);
4037         put_unaligned_le64((u64)queue_group->
4038                 iq_element_array_bus_addr[AIO_PATH],
4039                 &request.data.create_operational_iq.element_array_addr);
4040         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4041                 &request.data.create_operational_iq.ci_addr);
4042         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4043                 &request.data.create_operational_iq.num_elements);
4044         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4045                 &request.data.create_operational_iq.element_length);
4046         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4047
4048         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4049                 &response);
4050         if (rc) {
4051                 dev_err(&ctrl_info->pci_dev->dev,
4052                         "error creating inbound AIO queue\n");
4053                 goto delete_inbound_queue_raid;
4054         }
4055
4056         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4057                 PQI_DEVICE_REGISTERS_OFFSET +
4058                 get_unaligned_le64(
4059                         &response.data.create_operational_iq.iq_pi_offset);
4060
4061         /*
4062          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4063          * assumed to be for RAID path I/O unless we change the queue's
4064          * property.
4065          */
4066         memset(&request, 0, sizeof(request));
4067         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4068         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4069                 &request.header.iu_length);
4070         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4071         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4072                 &request.data.change_operational_iq_properties.queue_id);
4073         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4074                 &request.data.change_operational_iq_properties.vendor_specific);
4075
4076         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4077                 &response);
4078         if (rc) {
4079                 dev_err(&ctrl_info->pci_dev->dev,
4080                         "error changing queue property\n");
4081                 goto delete_inbound_queue_aio;
4082         }
4083
4084         /*
4085          * Create OQ (Outbound Queue - device to host queue).
4086          */
4087         memset(&request, 0, sizeof(request));
4088         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4089         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4090                 &request.header.iu_length);
4091         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4092         put_unaligned_le16(queue_group->oq_id,
4093                 &request.data.create_operational_oq.queue_id);
4094         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4095                 &request.data.create_operational_oq.element_array_addr);
4096         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4097                 &request.data.create_operational_oq.pi_addr);
4098         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4099                 &request.data.create_operational_oq.num_elements);
4100         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4101                 &request.data.create_operational_oq.element_length);
4102         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4103         put_unaligned_le16(queue_group->int_msg_num,
4104                 &request.data.create_operational_oq.int_msg_num);
4105
4106         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4107                 &response);
4108         if (rc) {
4109                 dev_err(&ctrl_info->pci_dev->dev,
4110                         "error creating outbound queue\n");
4111                 goto delete_inbound_queue_aio;
4112         }
4113
4114         queue_group->oq_ci = ctrl_info->iomem_base +
4115                 PQI_DEVICE_REGISTERS_OFFSET +
4116                 get_unaligned_le64(
4117                         &response.data.create_operational_oq.oq_ci_offset);
4118
4119         return 0;
4120
4121 delete_inbound_queue_aio:
4122         pqi_delete_operational_queue(ctrl_info, true,
4123                 queue_group->iq_id[AIO_PATH]);
4124
4125 delete_inbound_queue_raid:
4126         pqi_delete_operational_queue(ctrl_info, true,
4127                 queue_group->iq_id[RAID_PATH]);
4128
4129         return rc;
4130 }
4131
4132 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4133 {
4134         int rc;
4135         unsigned int i;
4136
4137         rc = pqi_create_event_queue(ctrl_info);
4138         if (rc) {
4139                 dev_err(&ctrl_info->pci_dev->dev,
4140                         "error creating event queue\n");
4141                 return rc;
4142         }
4143
4144         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4145                 rc = pqi_create_queue_group(ctrl_info, i);
4146                 if (rc) {
4147                         dev_err(&ctrl_info->pci_dev->dev,
4148                                 "error creating queue group number %u/%u\n",
4149                                 i, ctrl_info->num_queue_groups);
4150                         return rc;
4151                 }
4152         }
4153
4154         return 0;
4155 }
4156
4157 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4158         (offsetof(struct pqi_event_config, descriptors) + \
4159         (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
4160
4161 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4162         bool enable_events)
4163 {
4164         int rc;
4165         unsigned int i;
4166         struct pqi_event_config *event_config;
4167         struct pqi_event_descriptor *event_descriptor;
4168         struct pqi_general_management_request request;
4169
4170         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4171                 GFP_KERNEL);
4172         if (!event_config)
4173                 return -ENOMEM;
4174
4175         memset(&request, 0, sizeof(request));
4176
4177         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4178         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4179                 data.report_event_configuration.sg_descriptors[1]) -
4180                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4181         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4182                 &request.data.report_event_configuration.buffer_length);
4183
4184         rc = pqi_map_single(ctrl_info->pci_dev,
4185                 request.data.report_event_configuration.sg_descriptors,
4186                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4187                 PCI_DMA_FROMDEVICE);
4188         if (rc)
4189                 goto out;
4190
4191         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
4192                 0, NULL, NO_TIMEOUT);
4193
4194         pqi_pci_unmap(ctrl_info->pci_dev,
4195                 request.data.report_event_configuration.sg_descriptors, 1,
4196                 PCI_DMA_FROMDEVICE);
4197
4198         if (rc)
4199                 goto out;
4200
4201         for (i = 0; i < event_config->num_event_descriptors; i++) {
4202                 event_descriptor = &event_config->descriptors[i];
4203                 if (enable_events &&
4204                         pqi_is_supported_event(event_descriptor->event_type))
4205                         put_unaligned_le16(ctrl_info->event_queue.oq_id,
4206                                         &event_descriptor->oq_id);
4207                 else
4208                         put_unaligned_le16(0, &event_descriptor->oq_id);
4209         }
4210
4211         memset(&request, 0, sizeof(request));
4212
4213         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4214         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4215                 data.report_event_configuration.sg_descriptors[1]) -
4216                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4217         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4218                 &request.data.report_event_configuration.buffer_length);
4219
4220         rc = pqi_map_single(ctrl_info->pci_dev,
4221                 request.data.report_event_configuration.sg_descriptors,
4222                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4223                 PCI_DMA_TODEVICE);
4224         if (rc)
4225                 goto out;
4226
4227         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
4228                 NULL, NO_TIMEOUT);
4229
4230         pqi_pci_unmap(ctrl_info->pci_dev,
4231                 request.data.report_event_configuration.sg_descriptors, 1,
4232                 PCI_DMA_TODEVICE);
4233
4234 out:
4235         kfree(event_config);
4236
4237         return rc;
4238 }
4239
4240 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
4241 {
4242         return pqi_configure_events(ctrl_info, true);
4243 }
4244
4245 static inline int pqi_disable_events(struct pqi_ctrl_info *ctrl_info)
4246 {
4247         return pqi_configure_events(ctrl_info, false);
4248 }
4249
4250 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
4251 {
4252         unsigned int i;
4253         struct device *dev;
4254         size_t sg_chain_buffer_length;
4255         struct pqi_io_request *io_request;
4256
4257         if (!ctrl_info->io_request_pool)
4258                 return;
4259
4260         dev = &ctrl_info->pci_dev->dev;
4261         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4262         io_request = ctrl_info->io_request_pool;
4263
4264         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4265                 kfree(io_request->iu);
4266                 if (!io_request->sg_chain_buffer)
4267                         break;
4268                 dma_free_coherent(dev, sg_chain_buffer_length,
4269                         io_request->sg_chain_buffer,
4270                         io_request->sg_chain_buffer_dma_handle);
4271                 io_request++;
4272         }
4273
4274         kfree(ctrl_info->io_request_pool);
4275         ctrl_info->io_request_pool = NULL;
4276 }
4277
4278 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4279 {
4280         ctrl_info->error_buffer = dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
4281                 ctrl_info->error_buffer_length,
4282                 &ctrl_info->error_buffer_dma_handle, GFP_KERNEL);
4283
4284         if (!ctrl_info->error_buffer)
4285                 return -ENOMEM;
4286
4287         return 0;
4288 }
4289
4290 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4291 {
4292         unsigned int i;
4293         void *sg_chain_buffer;
4294         size_t sg_chain_buffer_length;
4295         dma_addr_t sg_chain_buffer_dma_handle;
4296         struct device *dev;
4297         struct pqi_io_request *io_request;
4298
4299         ctrl_info->io_request_pool = kzalloc(ctrl_info->max_io_slots *
4300                 sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4301
4302         if (!ctrl_info->io_request_pool) {
4303                 dev_err(&ctrl_info->pci_dev->dev,
4304                         "failed to allocate I/O request pool\n");
4305                 goto error;
4306         }
4307
4308         dev = &ctrl_info->pci_dev->dev;
4309         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4310         io_request = ctrl_info->io_request_pool;
4311
4312         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4313                 io_request->iu =
4314                         kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4315
4316                 if (!io_request->iu) {
4317                         dev_err(&ctrl_info->pci_dev->dev,
4318                                 "failed to allocate IU buffers\n");
4319                         goto error;
4320                 }
4321
4322                 sg_chain_buffer = dma_alloc_coherent(dev,
4323                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4324                         GFP_KERNEL);
4325
4326                 if (!sg_chain_buffer) {
4327                         dev_err(&ctrl_info->pci_dev->dev,
4328                                 "failed to allocate PQI scatter-gather chain buffers\n");
4329                         goto error;
4330                 }
4331
4332                 io_request->index = i;
4333                 io_request->sg_chain_buffer = sg_chain_buffer;
4334                 io_request->sg_chain_buffer_dma_handle =
4335                         sg_chain_buffer_dma_handle;
4336                 io_request++;
4337         }
4338
4339         return 0;
4340
4341 error:
4342         pqi_free_all_io_requests(ctrl_info);
4343
4344         return -ENOMEM;
4345 }
4346
4347 /*
4348  * Calculate required resources that are sized based on max. outstanding
4349  * requests and max. transfer size.
4350  */
4351
4352 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4353 {
4354         u32 max_transfer_size;
4355         u32 max_sg_entries;
4356
4357         ctrl_info->scsi_ml_can_queue =
4358                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4359         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4360
4361         ctrl_info->error_buffer_length =
4362                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4363
4364         if (reset_devices)
4365                 max_transfer_size = min(ctrl_info->max_transfer_size,
4366                         PQI_MAX_TRANSFER_SIZE_KDUMP);
4367         else
4368                 max_transfer_size = min(ctrl_info->max_transfer_size,
4369                         PQI_MAX_TRANSFER_SIZE);
4370
4371         max_sg_entries = max_transfer_size / PAGE_SIZE;
4372
4373         /* +1 to cover when the buffer is not page-aligned. */
4374         max_sg_entries++;
4375
4376         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4377
4378         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4379
4380         ctrl_info->sg_chain_buffer_length =
4381                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4382                 PQI_EXTRA_SGL_MEMORY;
4383         ctrl_info->sg_tablesize = max_sg_entries;
4384         ctrl_info->max_sectors = max_transfer_size / 512;
4385 }
4386
4387 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4388 {
4389         int num_queue_groups;
4390         u16 num_elements_per_iq;
4391         u16 num_elements_per_oq;
4392
4393         if (reset_devices) {
4394                 num_queue_groups = 1;
4395         } else {
4396                 int num_cpus;
4397                 int max_queue_groups;
4398
4399                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4400                         ctrl_info->max_outbound_queues - 1);
4401                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4402
4403                 num_cpus = num_online_cpus();
4404                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4405                 num_queue_groups = min(num_queue_groups, max_queue_groups);
4406         }
4407
4408         ctrl_info->num_queue_groups = num_queue_groups;
4409         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
4410
4411         /*
4412          * Make sure that the max. inbound IU length is an even multiple
4413          * of our inbound element length.
4414          */
4415         ctrl_info->max_inbound_iu_length =
4416                 (ctrl_info->max_inbound_iu_length_per_firmware /
4417                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4418                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4419
4420         num_elements_per_iq =
4421                 (ctrl_info->max_inbound_iu_length /
4422                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4423
4424         /* Add one because one element in each queue is unusable. */
4425         num_elements_per_iq++;
4426
4427         num_elements_per_iq = min(num_elements_per_iq,
4428                 ctrl_info->max_elements_per_iq);
4429
4430         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4431         num_elements_per_oq = min(num_elements_per_oq,
4432                 ctrl_info->max_elements_per_oq);
4433
4434         ctrl_info->num_elements_per_iq = num_elements_per_iq;
4435         ctrl_info->num_elements_per_oq = num_elements_per_oq;
4436
4437         ctrl_info->max_sg_per_iu =
4438                 ((ctrl_info->max_inbound_iu_length -
4439                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4440                 sizeof(struct pqi_sg_descriptor)) +
4441                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4442 }
4443
4444 static inline void pqi_set_sg_descriptor(
4445         struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4446 {
4447         u64 address = (u64)sg_dma_address(sg);
4448         unsigned int length = sg_dma_len(sg);
4449
4450         put_unaligned_le64(address, &sg_descriptor->address);
4451         put_unaligned_le32(length, &sg_descriptor->length);
4452         put_unaligned_le32(0, &sg_descriptor->flags);
4453 }
4454
4455 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4456         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4457         struct pqi_io_request *io_request)
4458 {
4459         int i;
4460         u16 iu_length;
4461         int sg_count;
4462         bool chained;
4463         unsigned int num_sg_in_iu;
4464         unsigned int max_sg_per_iu;
4465         struct scatterlist *sg;
4466         struct pqi_sg_descriptor *sg_descriptor;
4467
4468         sg_count = scsi_dma_map(scmd);
4469         if (sg_count < 0)
4470                 return sg_count;
4471
4472         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4473                 PQI_REQUEST_HEADER_LENGTH;
4474
4475         if (sg_count == 0)
4476                 goto out;
4477
4478         sg = scsi_sglist(scmd);
4479         sg_descriptor = request->sg_descriptors;
4480         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4481         chained = false;
4482         num_sg_in_iu = 0;
4483         i = 0;
4484
4485         while (1) {
4486                 pqi_set_sg_descriptor(sg_descriptor, sg);
4487                 if (!chained)
4488                         num_sg_in_iu++;
4489                 i++;
4490                 if (i == sg_count)
4491                         break;
4492                 sg_descriptor++;
4493                 if (i == max_sg_per_iu) {
4494                         put_unaligned_le64(
4495                                 (u64)io_request->sg_chain_buffer_dma_handle,
4496                                 &sg_descriptor->address);
4497                         put_unaligned_le32((sg_count - num_sg_in_iu)
4498                                 * sizeof(*sg_descriptor),
4499                                 &sg_descriptor->length);
4500                         put_unaligned_le32(CISS_SG_CHAIN,
4501                                 &sg_descriptor->flags);
4502                         chained = true;
4503                         num_sg_in_iu++;
4504                         sg_descriptor = io_request->sg_chain_buffer;
4505                 }
4506                 sg = sg_next(sg);
4507         }
4508
4509         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4510         request->partial = chained;
4511         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4512
4513 out:
4514         put_unaligned_le16(iu_length, &request->header.iu_length);
4515
4516         return 0;
4517 }
4518
4519 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4520         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4521         struct pqi_io_request *io_request)
4522 {
4523         int i;
4524         u16 iu_length;
4525         int sg_count;
4526         bool chained;
4527         unsigned int num_sg_in_iu;
4528         unsigned int max_sg_per_iu;
4529         struct scatterlist *sg;
4530         struct pqi_sg_descriptor *sg_descriptor;
4531
4532         sg_count = scsi_dma_map(scmd);
4533         if (sg_count < 0)
4534                 return sg_count;
4535
4536         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4537                 PQI_REQUEST_HEADER_LENGTH;
4538         num_sg_in_iu = 0;
4539
4540         if (sg_count == 0)
4541                 goto out;
4542
4543         sg = scsi_sglist(scmd);
4544         sg_descriptor = request->sg_descriptors;
4545         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4546         chained = false;
4547         i = 0;
4548
4549         while (1) {
4550                 pqi_set_sg_descriptor(sg_descriptor, sg);
4551                 if (!chained)
4552                         num_sg_in_iu++;
4553                 i++;
4554                 if (i == sg_count)
4555                         break;
4556                 sg_descriptor++;
4557                 if (i == max_sg_per_iu) {
4558                         put_unaligned_le64(
4559                                 (u64)io_request->sg_chain_buffer_dma_handle,
4560                                 &sg_descriptor->address);
4561                         put_unaligned_le32((sg_count - num_sg_in_iu)
4562                                 * sizeof(*sg_descriptor),
4563                                 &sg_descriptor->length);
4564                         put_unaligned_le32(CISS_SG_CHAIN,
4565                                 &sg_descriptor->flags);
4566                         chained = true;
4567                         num_sg_in_iu++;
4568                         sg_descriptor = io_request->sg_chain_buffer;
4569                 }
4570                 sg = sg_next(sg);
4571         }
4572
4573         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4574         request->partial = chained;
4575         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4576
4577 out:
4578         put_unaligned_le16(iu_length, &request->header.iu_length);
4579         request->num_sg_descriptors = num_sg_in_iu;
4580
4581         return 0;
4582 }
4583
4584 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4585         void *context)
4586 {
4587         struct scsi_cmnd *scmd;
4588
4589         scmd = io_request->scmd;
4590         pqi_free_io_request(io_request);
4591         scsi_dma_unmap(scmd);
4592         pqi_scsi_done(scmd);
4593 }
4594
4595 static int pqi_raid_submit_scsi_cmd_with_io_request(
4596         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
4597         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4598         struct pqi_queue_group *queue_group)
4599 {
4600         int rc;
4601         size_t cdb_length;
4602         struct pqi_raid_path_request *request;
4603
4604         io_request->io_complete_callback = pqi_raid_io_complete;
4605         io_request->scmd = scmd;
4606
4607         request = io_request->iu;
4608         memset(request, 0,
4609                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4610
4611         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4612         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4613         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4614         put_unaligned_le16(io_request->index, &request->request_id);
4615         request->error_index = request->request_id;
4616         memcpy(request->lun_number, device->scsi3addr,
4617                 sizeof(request->lun_number));
4618
4619         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4620         memcpy(request->cdb, scmd->cmnd, cdb_length);
4621
4622         switch (cdb_length) {
4623         case 6:
4624         case 10:
4625         case 12:
4626         case 16:
4627                 /* No bytes in the Additional CDB bytes field */
4628                 request->additional_cdb_bytes_usage =
4629                         SOP_ADDITIONAL_CDB_BYTES_0;
4630                 break;
4631         case 20:
4632                 /* 4 bytes in the Additional cdb field */
4633                 request->additional_cdb_bytes_usage =
4634                         SOP_ADDITIONAL_CDB_BYTES_4;
4635                 break;
4636         case 24:
4637                 /* 8 bytes in the Additional cdb field */
4638                 request->additional_cdb_bytes_usage =
4639                         SOP_ADDITIONAL_CDB_BYTES_8;
4640                 break;
4641         case 28:
4642                 /* 12 bytes in the Additional cdb field */
4643                 request->additional_cdb_bytes_usage =
4644                         SOP_ADDITIONAL_CDB_BYTES_12;
4645                 break;
4646         case 32:
4647         default:
4648                 /* 16 bytes in the Additional cdb field */
4649                 request->additional_cdb_bytes_usage =
4650                         SOP_ADDITIONAL_CDB_BYTES_16;
4651                 break;
4652         }
4653
4654         switch (scmd->sc_data_direction) {
4655         case DMA_TO_DEVICE:
4656                 request->data_direction = SOP_READ_FLAG;
4657                 break;
4658         case DMA_FROM_DEVICE:
4659                 request->data_direction = SOP_WRITE_FLAG;
4660                 break;
4661         case DMA_NONE:
4662                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4663                 break;
4664         case DMA_BIDIRECTIONAL:
4665                 request->data_direction = SOP_BIDIRECTIONAL;
4666                 break;
4667         default:
4668                 dev_err(&ctrl_info->pci_dev->dev,
4669                         "unknown data direction: %d\n",
4670                         scmd->sc_data_direction);
4671                 break;
4672         }
4673
4674         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
4675         if (rc) {
4676                 pqi_free_io_request(io_request);
4677                 return SCSI_MLQUEUE_HOST_BUSY;
4678         }
4679
4680         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
4681
4682         return 0;
4683 }
4684
4685 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4686         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4687         struct pqi_queue_group *queue_group)
4688 {
4689         struct pqi_io_request *io_request;
4690
4691         io_request = pqi_alloc_io_request(ctrl_info);
4692
4693         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4694                 device, scmd, queue_group);
4695 }
4696
4697 static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info)
4698 {
4699         if (!pqi_ctrl_blocked(ctrl_info))
4700                 schedule_work(&ctrl_info->raid_bypass_retry_work);
4701 }
4702
4703 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
4704 {
4705         struct scsi_cmnd *scmd;
4706         struct pqi_scsi_dev *device;
4707         struct pqi_ctrl_info *ctrl_info;
4708
4709         if (!io_request->raid_bypass)
4710                 return false;
4711
4712         scmd = io_request->scmd;
4713         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
4714                 return false;
4715         if (host_byte(scmd->result) == DID_NO_CONNECT)
4716                 return false;
4717
4718         device = scmd->device->hostdata;
4719         if (pqi_device_offline(device))
4720                 return false;
4721
4722         ctrl_info = shost_to_hba(scmd->device->host);
4723         if (pqi_ctrl_offline(ctrl_info))
4724                 return false;
4725
4726         return true;
4727 }
4728
4729 static inline void pqi_add_to_raid_bypass_retry_list(
4730         struct pqi_ctrl_info *ctrl_info,
4731         struct pqi_io_request *io_request, bool at_head)
4732 {
4733         unsigned long flags;
4734
4735         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4736         if (at_head)
4737                 list_add(&io_request->request_list_entry,
4738                         &ctrl_info->raid_bypass_retry_list);
4739         else
4740                 list_add_tail(&io_request->request_list_entry,
4741                         &ctrl_info->raid_bypass_retry_list);
4742         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4743 }
4744
4745 static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request,
4746         void *context)
4747 {
4748         struct scsi_cmnd *scmd;
4749
4750         scmd = io_request->scmd;
4751         pqi_free_io_request(io_request);
4752         pqi_scsi_done(scmd);
4753 }
4754
4755 static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request)
4756 {
4757         struct scsi_cmnd *scmd;
4758         struct pqi_ctrl_info *ctrl_info;
4759
4760         io_request->io_complete_callback = pqi_queued_raid_bypass_complete;
4761         scmd = io_request->scmd;
4762         scmd->result = 0;
4763         ctrl_info = shost_to_hba(scmd->device->host);
4764
4765         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false);
4766         pqi_schedule_bypass_retry(ctrl_info);
4767 }
4768
4769 static int pqi_retry_raid_bypass(struct pqi_io_request *io_request)
4770 {
4771         struct scsi_cmnd *scmd;
4772         struct pqi_scsi_dev *device;
4773         struct pqi_ctrl_info *ctrl_info;
4774         struct pqi_queue_group *queue_group;
4775
4776         scmd = io_request->scmd;
4777         device = scmd->device->hostdata;
4778         if (pqi_device_in_reset(device)) {
4779                 pqi_free_io_request(io_request);
4780                 set_host_byte(scmd, DID_RESET);
4781                 pqi_scsi_done(scmd);
4782                 return 0;
4783         }
4784
4785         ctrl_info = shost_to_hba(scmd->device->host);
4786         queue_group = io_request->queue_group;
4787
4788         pqi_reinit_io_request(io_request);
4789
4790         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4791                 device, scmd, queue_group);
4792 }
4793
4794 static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request(
4795         struct pqi_ctrl_info *ctrl_info)
4796 {
4797         unsigned long flags;
4798         struct pqi_io_request *io_request;
4799
4800         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4801         io_request = list_first_entry_or_null(
4802                 &ctrl_info->raid_bypass_retry_list,
4803                 struct pqi_io_request, request_list_entry);
4804         if (io_request)
4805                 list_del(&io_request->request_list_entry);
4806         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4807
4808         return io_request;
4809 }
4810
4811 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info)
4812 {
4813         int rc;
4814         struct pqi_io_request *io_request;
4815
4816         pqi_ctrl_busy(ctrl_info);
4817
4818         while (1) {
4819                 if (pqi_ctrl_blocked(ctrl_info))
4820                         break;
4821                 io_request = pqi_next_queued_raid_bypass_request(ctrl_info);
4822                 if (!io_request)
4823                         break;
4824                 rc = pqi_retry_raid_bypass(io_request);
4825                 if (rc) {
4826                         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request,
4827                                 true);
4828                         pqi_schedule_bypass_retry(ctrl_info);
4829                         break;
4830                 }
4831         }
4832
4833         pqi_ctrl_unbusy(ctrl_info);
4834 }
4835
4836 static void pqi_raid_bypass_retry_worker(struct work_struct *work)
4837 {
4838         struct pqi_ctrl_info *ctrl_info;
4839
4840         ctrl_info = container_of(work, struct pqi_ctrl_info,
4841                 raid_bypass_retry_work);
4842         pqi_retry_raid_bypass_requests(ctrl_info);
4843 }
4844
4845 static void pqi_clear_all_queued_raid_bypass_retries(
4846         struct pqi_ctrl_info *ctrl_info)
4847 {
4848         unsigned long flags;
4849
4850         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4851         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
4852         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4853 }
4854
4855 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
4856         void *context)
4857 {
4858         struct scsi_cmnd *scmd;
4859
4860         scmd = io_request->scmd;
4861         scsi_dma_unmap(scmd);
4862         if (io_request->status == -EAGAIN)
4863                 set_host_byte(scmd, DID_IMM_RETRY);
4864         else if (pqi_raid_bypass_retry_needed(io_request)) {
4865                 pqi_queue_raid_bypass_retry(io_request);
4866                 return;
4867         }
4868         pqi_free_io_request(io_request);
4869         pqi_scsi_done(scmd);
4870 }
4871
4872 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4873         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4874         struct pqi_queue_group *queue_group)
4875 {
4876         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
4877                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
4878 }
4879
4880 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
4881         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
4882         unsigned int cdb_length, struct pqi_queue_group *queue_group,
4883         struct pqi_encryption_info *encryption_info, bool raid_bypass)
4884 {
4885         int rc;
4886         struct pqi_io_request *io_request;
4887         struct pqi_aio_path_request *request;
4888
4889         io_request = pqi_alloc_io_request(ctrl_info);
4890         io_request->io_complete_callback = pqi_aio_io_complete;
4891         io_request->scmd = scmd;
4892         io_request->raid_bypass = raid_bypass;
4893
4894         request = io_request->iu;
4895         memset(request, 0,
4896                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4897
4898         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
4899         put_unaligned_le32(aio_handle, &request->nexus_id);
4900         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4901         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4902         put_unaligned_le16(io_request->index, &request->request_id);
4903         request->error_index = request->request_id;
4904         if (cdb_length > sizeof(request->cdb))
4905                 cdb_length = sizeof(request->cdb);
4906         request->cdb_length = cdb_length;
4907         memcpy(request->cdb, cdb, cdb_length);
4908
4909         switch (scmd->sc_data_direction) {
4910         case DMA_TO_DEVICE:
4911                 request->data_direction = SOP_READ_FLAG;
4912                 break;
4913         case DMA_FROM_DEVICE:
4914                 request->data_direction = SOP_WRITE_FLAG;
4915                 break;
4916         case DMA_NONE:
4917                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4918                 break;
4919         case DMA_BIDIRECTIONAL:
4920                 request->data_direction = SOP_BIDIRECTIONAL;
4921                 break;
4922         default:
4923                 dev_err(&ctrl_info->pci_dev->dev,
4924                         "unknown data direction: %d\n",
4925                         scmd->sc_data_direction);
4926                 break;
4927         }
4928
4929         if (encryption_info) {
4930                 request->encryption_enable = true;
4931                 put_unaligned_le16(encryption_info->data_encryption_key_index,
4932                         &request->data_encryption_key_index);
4933                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
4934                         &request->encrypt_tweak_lower);
4935                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
4936                         &request->encrypt_tweak_upper);
4937         }
4938
4939         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
4940         if (rc) {
4941                 pqi_free_io_request(io_request);
4942                 return SCSI_MLQUEUE_HOST_BUSY;
4943         }
4944
4945         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
4946
4947         return 0;
4948 }
4949
4950 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
4951         struct scsi_cmnd *scmd)
4952 {
4953         u16 hw_queue;
4954
4955         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
4956         if (hw_queue > ctrl_info->max_hw_queue_index)
4957                 hw_queue = 0;
4958
4959         return hw_queue;
4960 }
4961
4962 /*
4963  * This function gets called just before we hand the completed SCSI request
4964  * back to the SML.
4965  */
4966
4967 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
4968 {
4969         struct pqi_scsi_dev *device;
4970
4971         device = scmd->device->hostdata;
4972         atomic_dec(&device->scsi_cmds_outstanding);
4973 }
4974
4975 static int pqi_scsi_queue_command(struct Scsi_Host *shost,
4976         struct scsi_cmnd *scmd)
4977 {
4978         int rc;
4979         struct pqi_ctrl_info *ctrl_info;
4980         struct pqi_scsi_dev *device;
4981         u16 hw_queue;
4982         struct pqi_queue_group *queue_group;
4983         bool raid_bypassed;
4984
4985         device = scmd->device->hostdata;
4986         ctrl_info = shost_to_hba(shost);
4987
4988         atomic_inc(&device->scsi_cmds_outstanding);
4989
4990         if (pqi_ctrl_offline(ctrl_info)) {
4991                 set_host_byte(scmd, DID_NO_CONNECT);
4992                 pqi_scsi_done(scmd);
4993                 return 0;
4994         }
4995
4996         pqi_ctrl_busy(ctrl_info);
4997         if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device)) {
4998                 rc = SCSI_MLQUEUE_HOST_BUSY;
4999                 goto out;
5000         }
5001
5002         /*
5003          * This is necessary because the SML doesn't zero out this field during
5004          * error recovery.
5005          */
5006         scmd->result = 0;
5007
5008         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
5009         queue_group = &ctrl_info->queue_groups[hw_queue];
5010
5011         if (pqi_is_logical_device(device)) {
5012                 raid_bypassed = false;
5013                 if (device->raid_bypass_enabled &&
5014                                 !blk_rq_is_passthrough(scmd->request)) {
5015                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
5016                                 scmd, queue_group);
5017                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY)
5018                                 raid_bypassed = true;
5019                 }
5020                 if (!raid_bypassed)
5021                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5022                                 queue_group);
5023         } else {
5024                 if (device->aio_enabled)
5025                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
5026                                 queue_group);
5027                 else
5028                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5029                                 queue_group);
5030         }
5031
5032 out:
5033         pqi_ctrl_unbusy(ctrl_info);
5034         if (rc)
5035                 atomic_dec(&device->scsi_cmds_outstanding);
5036
5037         return rc;
5038 }
5039
5040 static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
5041         struct pqi_queue_group *queue_group)
5042 {
5043         unsigned int path;
5044         unsigned long flags;
5045         bool list_is_empty;
5046
5047         for (path = 0; path < 2; path++) {
5048                 while (1) {
5049                         spin_lock_irqsave(
5050                                 &queue_group->submit_lock[path], flags);
5051                         list_is_empty =
5052                                 list_empty(&queue_group->request_list[path]);
5053                         spin_unlock_irqrestore(
5054                                 &queue_group->submit_lock[path], flags);
5055                         if (list_is_empty)
5056                                 break;
5057                         pqi_check_ctrl_health(ctrl_info);
5058                         if (pqi_ctrl_offline(ctrl_info))
5059                                 return -ENXIO;
5060                         usleep_range(1000, 2000);
5061                 }
5062         }
5063
5064         return 0;
5065 }
5066
5067 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5068 {
5069         int rc;
5070         unsigned int i;
5071         unsigned int path;
5072         struct pqi_queue_group *queue_group;
5073         pqi_index_t iq_pi;
5074         pqi_index_t iq_ci;
5075
5076         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5077                 queue_group = &ctrl_info->queue_groups[i];
5078
5079                 rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5080                 if (rc)
5081                         return rc;
5082
5083                 for (path = 0; path < 2; path++) {
5084                         iq_pi = queue_group->iq_pi_copy[path];
5085
5086                         while (1) {
5087                                 iq_ci = *queue_group->iq_ci[path];
5088                                 if (iq_ci == iq_pi)
5089                                         break;
5090                                 pqi_check_ctrl_health(ctrl_info);
5091                                 if (pqi_ctrl_offline(ctrl_info))
5092                                         return -ENXIO;
5093                                 usleep_range(1000, 2000);
5094                         }
5095                 }
5096         }
5097
5098         return 0;
5099 }
5100
5101 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5102         struct pqi_scsi_dev *device)
5103 {
5104         unsigned int i;
5105         unsigned int path;
5106         struct pqi_queue_group *queue_group;
5107         unsigned long flags;
5108         struct pqi_io_request *io_request;
5109         struct pqi_io_request *next;
5110         struct scsi_cmnd *scmd;
5111         struct pqi_scsi_dev *scsi_device;
5112
5113         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5114                 queue_group = &ctrl_info->queue_groups[i];
5115
5116                 for (path = 0; path < 2; path++) {
5117                         spin_lock_irqsave(
5118                                 &queue_group->submit_lock[path], flags);
5119
5120                         list_for_each_entry_safe(io_request, next,
5121                                 &queue_group->request_list[path],
5122                                 request_list_entry) {
5123                                 scmd = io_request->scmd;
5124                                 if (!scmd)
5125                                         continue;
5126
5127                                 scsi_device = scmd->device->hostdata;
5128                                 if (scsi_device != device)
5129                                         continue;
5130
5131                                 list_del(&io_request->request_list_entry);
5132                                 set_host_byte(scmd, DID_RESET);
5133                                 pqi_scsi_done(scmd);
5134                         }
5135
5136                         spin_unlock_irqrestore(
5137                                 &queue_group->submit_lock[path], flags);
5138                 }
5139         }
5140 }
5141
5142 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5143         struct pqi_scsi_dev *device)
5144 {
5145         while (atomic_read(&device->scsi_cmds_outstanding)) {
5146                 pqi_check_ctrl_health(ctrl_info);
5147                 if (pqi_ctrl_offline(ctrl_info))
5148                         return -ENXIO;
5149                 usleep_range(1000, 2000);
5150         }
5151
5152         return 0;
5153 }
5154
5155 static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info)
5156 {
5157         bool io_pending;
5158         unsigned long flags;
5159         struct pqi_scsi_dev *device;
5160
5161         while (1) {
5162                 io_pending = false;
5163
5164                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5165                 list_for_each_entry(device, &ctrl_info->scsi_device_list,
5166                         scsi_device_list_entry) {
5167                         if (atomic_read(&device->scsi_cmds_outstanding)) {
5168                                 io_pending = true;
5169                                 break;
5170                         }
5171                 }
5172                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5173                                         flags);
5174
5175                 if (!io_pending)
5176                         break;
5177
5178                 pqi_check_ctrl_health(ctrl_info);
5179                 if (pqi_ctrl_offline(ctrl_info))
5180                         return -ENXIO;
5181
5182                 usleep_range(1000, 2000);
5183         }
5184
5185         return 0;
5186 }
5187
5188 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5189         void *context)
5190 {
5191         struct completion *waiting = context;
5192
5193         complete(waiting);
5194 }
5195
5196 #define PQI_LUN_RESET_TIMEOUT_SECS      10
5197
5198 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5199         struct pqi_scsi_dev *device, struct completion *wait)
5200 {
5201         int rc;
5202
5203         while (1) {
5204                 if (wait_for_completion_io_timeout(wait,
5205                         PQI_LUN_RESET_TIMEOUT_SECS * HZ)) {
5206                         rc = 0;
5207                         break;
5208                 }
5209
5210                 pqi_check_ctrl_health(ctrl_info);
5211                 if (pqi_ctrl_offline(ctrl_info)) {
5212                         rc = -ENXIO;
5213                         break;
5214                 }
5215         }
5216
5217         return rc;
5218 }
5219
5220 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
5221         struct pqi_scsi_dev *device)
5222 {
5223         int rc;
5224         struct pqi_io_request *io_request;
5225         DECLARE_COMPLETION_ONSTACK(wait);
5226         struct pqi_task_management_request *request;
5227
5228         io_request = pqi_alloc_io_request(ctrl_info);
5229         io_request->io_complete_callback = pqi_lun_reset_complete;
5230         io_request->context = &wait;
5231
5232         request = io_request->iu;
5233         memset(request, 0, sizeof(*request));
5234
5235         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5236         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5237                 &request->header.iu_length);
5238         put_unaligned_le16(io_request->index, &request->request_id);
5239         memcpy(request->lun_number, device->scsi3addr,
5240                 sizeof(request->lun_number));
5241         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5242
5243         pqi_start_io(ctrl_info,
5244                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5245                 io_request);
5246
5247         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5248         if (rc == 0)
5249                 rc = io_request->status;
5250
5251         pqi_free_io_request(io_request);
5252
5253         return rc;
5254 }
5255
5256 /* Performs a reset at the LUN level. */
5257
5258 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5259         struct pqi_scsi_dev *device)
5260 {
5261         int rc;
5262
5263         rc = pqi_lun_reset(ctrl_info, device);
5264         if (rc == 0)
5265                 rc = pqi_device_wait_for_pending_io(ctrl_info, device);
5266
5267         return rc == 0 ? SUCCESS : FAILED;
5268 }
5269
5270 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
5271 {
5272         int rc;
5273         struct Scsi_Host *shost;
5274         struct pqi_ctrl_info *ctrl_info;
5275         struct pqi_scsi_dev *device;
5276
5277         shost = scmd->device->host;
5278         ctrl_info = shost_to_hba(shost);
5279         device = scmd->device->hostdata;
5280
5281         dev_err(&ctrl_info->pci_dev->dev,
5282                 "resetting scsi %d:%d:%d:%d\n",
5283                 shost->host_no, device->bus, device->target, device->lun);
5284
5285         pqi_check_ctrl_health(ctrl_info);
5286         if (pqi_ctrl_offline(ctrl_info)) {
5287                 rc = FAILED;
5288                 goto out;
5289         }
5290
5291         mutex_lock(&ctrl_info->lun_reset_mutex);
5292
5293         pqi_ctrl_block_requests(ctrl_info);
5294         pqi_ctrl_wait_until_quiesced(ctrl_info);
5295         pqi_fail_io_queued_for_device(ctrl_info, device);
5296         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
5297         pqi_device_reset_start(device);
5298         pqi_ctrl_unblock_requests(ctrl_info);
5299
5300         if (rc)
5301                 rc = FAILED;
5302         else
5303                 rc = pqi_device_reset(ctrl_info, device);
5304
5305         pqi_device_reset_done(device);
5306
5307         mutex_unlock(&ctrl_info->lun_reset_mutex);
5308
5309 out:
5310         dev_err(&ctrl_info->pci_dev->dev,
5311                 "reset of scsi %d:%d:%d:%d: %s\n",
5312                 shost->host_no, device->bus, device->target, device->lun,
5313                 rc == SUCCESS ? "SUCCESS" : "FAILED");
5314
5315         return rc;
5316 }
5317
5318 static int pqi_slave_alloc(struct scsi_device *sdev)
5319 {
5320         struct pqi_scsi_dev *device;
5321         unsigned long flags;
5322         struct pqi_ctrl_info *ctrl_info;
5323         struct scsi_target *starget;
5324         struct sas_rphy *rphy;
5325
5326         ctrl_info = shost_to_hba(sdev->host);
5327
5328         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5329
5330         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
5331                 starget = scsi_target(sdev);
5332                 rphy = target_to_rphy(starget);
5333                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
5334                 if (device) {
5335                         device->target = sdev_id(sdev);
5336                         device->lun = sdev->lun;
5337                         device->target_lun_valid = true;
5338                 }
5339         } else {
5340                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
5341                         sdev_id(sdev), sdev->lun);
5342         }
5343
5344         if (device) {
5345                 sdev->hostdata = device;
5346                 device->sdev = sdev;
5347                 if (device->queue_depth) {
5348                         device->advertised_queue_depth = device->queue_depth;
5349                         scsi_change_queue_depth(sdev,
5350                                 device->advertised_queue_depth);
5351                 }
5352         }
5353
5354         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5355
5356         return 0;
5357 }
5358
5359 static int pqi_map_queues(struct Scsi_Host *shost)
5360 {
5361         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
5362
5363         return blk_mq_pci_map_queues(&shost->tag_set, ctrl_info->pci_dev);
5364 }
5365
5366 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
5367         void __user *arg)
5368 {
5369         struct pci_dev *pci_dev;
5370         u32 subsystem_vendor;
5371         u32 subsystem_device;
5372         cciss_pci_info_struct pciinfo;
5373
5374         if (!arg)
5375                 return -EINVAL;
5376
5377         pci_dev = ctrl_info->pci_dev;
5378
5379         pciinfo.domain = pci_domain_nr(pci_dev->bus);
5380         pciinfo.bus = pci_dev->bus->number;
5381         pciinfo.dev_fn = pci_dev->devfn;
5382         subsystem_vendor = pci_dev->subsystem_vendor;
5383         subsystem_device = pci_dev->subsystem_device;
5384         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
5385                 subsystem_vendor;
5386
5387         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
5388                 return -EFAULT;
5389
5390         return 0;
5391 }
5392
5393 static int pqi_getdrivver_ioctl(void __user *arg)
5394 {
5395         u32 version;
5396
5397         if (!arg)
5398                 return -EINVAL;
5399
5400         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
5401                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
5402
5403         if (copy_to_user(arg, &version, sizeof(version)))
5404                 return -EFAULT;
5405
5406         return 0;
5407 }
5408
5409 struct ciss_error_info {
5410         u8      scsi_status;
5411         int     command_status;
5412         size_t  sense_data_length;
5413 };
5414
5415 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
5416         struct ciss_error_info *ciss_error_info)
5417 {
5418         int ciss_cmd_status;
5419         size_t sense_data_length;
5420
5421         switch (pqi_error_info->data_out_result) {
5422         case PQI_DATA_IN_OUT_GOOD:
5423                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
5424                 break;
5425         case PQI_DATA_IN_OUT_UNDERFLOW:
5426                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
5427                 break;
5428         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
5429                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
5430                 break;
5431         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
5432         case PQI_DATA_IN_OUT_BUFFER_ERROR:
5433         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
5434         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
5435         case PQI_DATA_IN_OUT_ERROR:
5436                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
5437                 break;
5438         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
5439         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
5440         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
5441         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
5442         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
5443         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
5444         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
5445         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
5446         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
5447         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
5448                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
5449                 break;
5450         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
5451                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
5452                 break;
5453         case PQI_DATA_IN_OUT_ABORTED:
5454                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
5455                 break;
5456         case PQI_DATA_IN_OUT_TIMEOUT:
5457                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
5458                 break;
5459         default:
5460                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
5461                 break;
5462         }
5463
5464         sense_data_length =
5465                 get_unaligned_le16(&pqi_error_info->sense_data_length);
5466         if (sense_data_length == 0)
5467                 sense_data_length =
5468                 get_unaligned_le16(&pqi_error_info->response_data_length);
5469         if (sense_data_length)
5470                 if (sense_data_length > sizeof(pqi_error_info->data))
5471                         sense_data_length = sizeof(pqi_error_info->data);
5472
5473         ciss_error_info->scsi_status = pqi_error_info->status;
5474         ciss_error_info->command_status = ciss_cmd_status;
5475         ciss_error_info->sense_data_length = sense_data_length;
5476 }
5477
5478 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5479 {
5480         int rc;
5481         char *kernel_buffer = NULL;
5482         u16 iu_length;
5483         size_t sense_data_length;
5484         IOCTL_Command_struct iocommand;
5485         struct pqi_raid_path_request request;
5486         struct pqi_raid_error_info pqi_error_info;
5487         struct ciss_error_info ciss_error_info;
5488
5489         if (pqi_ctrl_offline(ctrl_info))
5490                 return -ENXIO;
5491         if (!arg)
5492                 return -EINVAL;
5493         if (!capable(CAP_SYS_RAWIO))
5494                 return -EPERM;
5495         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
5496                 return -EFAULT;
5497         if (iocommand.buf_size < 1 &&
5498                 iocommand.Request.Type.Direction != XFER_NONE)
5499                 return -EINVAL;
5500         if (iocommand.Request.CDBLen > sizeof(request.cdb))
5501                 return -EINVAL;
5502         if (iocommand.Request.Type.Type != TYPE_CMD)
5503                 return -EINVAL;
5504
5505         switch (iocommand.Request.Type.Direction) {
5506         case XFER_NONE:
5507         case XFER_WRITE:
5508         case XFER_READ:
5509         case XFER_READ | XFER_WRITE:
5510                 break;
5511         default:
5512                 return -EINVAL;
5513         }
5514
5515         if (iocommand.buf_size > 0) {
5516                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
5517                 if (!kernel_buffer)
5518                         return -ENOMEM;
5519                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
5520                         if (copy_from_user(kernel_buffer, iocommand.buf,
5521                                 iocommand.buf_size)) {
5522                                 rc = -EFAULT;
5523                                 goto out;
5524                         }
5525                 } else {
5526                         memset(kernel_buffer, 0, iocommand.buf_size);
5527                 }
5528         }
5529
5530         memset(&request, 0, sizeof(request));
5531
5532         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5533         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5534                 PQI_REQUEST_HEADER_LENGTH;
5535         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
5536                 sizeof(request.lun_number));
5537         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
5538         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5539
5540         switch (iocommand.Request.Type.Direction) {
5541         case XFER_NONE:
5542                 request.data_direction = SOP_NO_DIRECTION_FLAG;
5543                 break;
5544         case XFER_WRITE:
5545                 request.data_direction = SOP_WRITE_FLAG;
5546                 break;
5547         case XFER_READ:
5548                 request.data_direction = SOP_READ_FLAG;
5549                 break;
5550         case XFER_READ | XFER_WRITE:
5551                 request.data_direction = SOP_BIDIRECTIONAL;
5552                 break;
5553         }
5554
5555         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5556
5557         if (iocommand.buf_size > 0) {
5558                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
5559
5560                 rc = pqi_map_single(ctrl_info->pci_dev,
5561                         &request.sg_descriptors[0], kernel_buffer,
5562                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
5563                 if (rc)
5564                         goto out;
5565
5566                 iu_length += sizeof(request.sg_descriptors[0]);
5567         }
5568
5569         put_unaligned_le16(iu_length, &request.header.iu_length);
5570
5571         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
5572                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
5573
5574         if (iocommand.buf_size > 0)
5575                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
5576                         PCI_DMA_BIDIRECTIONAL);
5577
5578         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
5579
5580         if (rc == 0) {
5581                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
5582                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
5583                 iocommand.error_info.CommandStatus =
5584                         ciss_error_info.command_status;
5585                 sense_data_length = ciss_error_info.sense_data_length;
5586                 if (sense_data_length) {
5587                         if (sense_data_length >
5588                                 sizeof(iocommand.error_info.SenseInfo))
5589                                 sense_data_length =
5590                                         sizeof(iocommand.error_info.SenseInfo);
5591                         memcpy(iocommand.error_info.SenseInfo,
5592                                 pqi_error_info.data, sense_data_length);
5593                         iocommand.error_info.SenseLen = sense_data_length;
5594                 }
5595         }
5596
5597         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
5598                 rc = -EFAULT;
5599                 goto out;
5600         }
5601
5602         if (rc == 0 && iocommand.buf_size > 0 &&
5603                 (iocommand.Request.Type.Direction & XFER_READ)) {
5604                 if (copy_to_user(iocommand.buf, kernel_buffer,
5605                         iocommand.buf_size)) {
5606                         rc = -EFAULT;
5607                 }
5608         }
5609
5610 out:
5611         kfree(kernel_buffer);
5612
5613         return rc;
5614 }
5615
5616 static int pqi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
5617 {
5618         int rc;
5619         struct pqi_ctrl_info *ctrl_info;
5620
5621         ctrl_info = shost_to_hba(sdev->host);
5622
5623         switch (cmd) {
5624         case CCISS_DEREGDISK:
5625         case CCISS_REGNEWDISK:
5626         case CCISS_REGNEWD:
5627                 rc = pqi_scan_scsi_devices(ctrl_info);
5628                 break;
5629         case CCISS_GETPCIINFO:
5630                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
5631                 break;
5632         case CCISS_GETDRIVVER:
5633                 rc = pqi_getdrivver_ioctl(arg);
5634                 break;
5635         case CCISS_PASSTHRU:
5636                 rc = pqi_passthru_ioctl(ctrl_info, arg);
5637                 break;
5638         default:
5639                 rc = -EINVAL;
5640                 break;
5641         }
5642
5643         return rc;
5644 }
5645
5646 static ssize_t pqi_version_show(struct device *dev,
5647         struct device_attribute *attr, char *buffer)
5648 {
5649         ssize_t count = 0;
5650         struct Scsi_Host *shost;
5651         struct pqi_ctrl_info *ctrl_info;
5652
5653         shost = class_to_shost(dev);
5654         ctrl_info = shost_to_hba(shost);
5655
5656         count += snprintf(buffer + count, PAGE_SIZE - count,
5657                 "  driver: %s\n", DRIVER_VERSION BUILD_TIMESTAMP);
5658
5659         count += snprintf(buffer + count, PAGE_SIZE - count,
5660                 "firmware: %s\n", ctrl_info->firmware_version);
5661
5662         return count;
5663 }
5664
5665 static ssize_t pqi_host_rescan_store(struct device *dev,
5666         struct device_attribute *attr, const char *buffer, size_t count)
5667 {
5668         struct Scsi_Host *shost = class_to_shost(dev);
5669
5670         pqi_scan_start(shost);
5671
5672         return count;
5673 }
5674
5675 static ssize_t pqi_lockup_action_show(struct device *dev,
5676         struct device_attribute *attr, char *buffer)
5677 {
5678         int count = 0;
5679         unsigned int i;
5680
5681         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5682                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
5683                         count += snprintf(buffer + count, PAGE_SIZE - count,
5684                                 "[%s] ", pqi_lockup_actions[i].name);
5685                 else
5686                         count += snprintf(buffer + count, PAGE_SIZE - count,
5687                                 "%s ", pqi_lockup_actions[i].name);
5688         }
5689
5690         count += snprintf(buffer + count, PAGE_SIZE - count, "\n");
5691
5692         return count;
5693 }
5694
5695 static ssize_t pqi_lockup_action_store(struct device *dev,
5696         struct device_attribute *attr, const char *buffer, size_t count)
5697 {
5698         unsigned int i;
5699         char *action_name;
5700         char action_name_buffer[32];
5701
5702         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
5703         action_name = strstrip(action_name_buffer);
5704
5705         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5706                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
5707                         pqi_lockup_action = pqi_lockup_actions[i].action;
5708                         return count;
5709                 }
5710         }
5711
5712         return -EINVAL;
5713 }
5714
5715 static DEVICE_ATTR(version, 0444, pqi_version_show, NULL);
5716 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
5717 static DEVICE_ATTR(lockup_action, 0644,
5718         pqi_lockup_action_show, pqi_lockup_action_store);
5719
5720 static struct device_attribute *pqi_shost_attrs[] = {
5721         &dev_attr_version,
5722         &dev_attr_rescan,
5723         &dev_attr_lockup_action,
5724         NULL
5725 };
5726
5727 static ssize_t pqi_sas_address_show(struct device *dev,
5728         struct device_attribute *attr, char *buffer)
5729 {
5730         struct pqi_ctrl_info *ctrl_info;
5731         struct scsi_device *sdev;
5732         struct pqi_scsi_dev *device;
5733         unsigned long flags;
5734         u64 sas_address;
5735
5736         sdev = to_scsi_device(dev);
5737         ctrl_info = shost_to_hba(sdev->host);
5738
5739         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5740
5741         device = sdev->hostdata;
5742         if (pqi_is_logical_device(device)) {
5743                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5744                         flags);
5745                 return -ENODEV;
5746         }
5747         sas_address = device->sas_address;
5748
5749         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5750
5751         return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
5752 }
5753
5754 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
5755         struct device_attribute *attr, char *buffer)
5756 {
5757         struct pqi_ctrl_info *ctrl_info;
5758         struct scsi_device *sdev;
5759         struct pqi_scsi_dev *device;
5760         unsigned long flags;
5761
5762         sdev = to_scsi_device(dev);
5763         ctrl_info = shost_to_hba(sdev->host);
5764
5765         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5766
5767         device = sdev->hostdata;
5768         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
5769         buffer[1] = '\n';
5770         buffer[2] = '\0';
5771
5772         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5773
5774         return 2;
5775 }
5776
5777 static ssize_t pqi_raid_level_show(struct device *dev,
5778         struct device_attribute *attr, char *buffer)
5779 {
5780         struct pqi_ctrl_info *ctrl_info;
5781         struct scsi_device *sdev;
5782         struct pqi_scsi_dev *device;
5783         unsigned long flags;
5784         char *raid_level;
5785
5786         sdev = to_scsi_device(dev);
5787         ctrl_info = shost_to_hba(sdev->host);
5788
5789         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5790
5791         device = sdev->hostdata;
5792
5793         if (pqi_is_logical_device(device))
5794                 raid_level = pqi_raid_level_to_string(device->raid_level);
5795         else
5796                 raid_level = "N/A";
5797
5798         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5799
5800         return snprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
5801 }
5802
5803 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
5804 static DEVICE_ATTR(ssd_smart_path_enabled, 0444,
5805         pqi_ssd_smart_path_enabled_show, NULL);
5806 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
5807
5808 static struct device_attribute *pqi_sdev_attrs[] = {
5809         &dev_attr_sas_address,
5810         &dev_attr_ssd_smart_path_enabled,
5811         &dev_attr_raid_level,
5812         NULL
5813 };
5814
5815 static struct scsi_host_template pqi_driver_template = {
5816         .module = THIS_MODULE,
5817         .name = DRIVER_NAME_SHORT,
5818         .proc_name = DRIVER_NAME_SHORT,
5819         .queuecommand = pqi_scsi_queue_command,
5820         .scan_start = pqi_scan_start,
5821         .scan_finished = pqi_scan_finished,
5822         .this_id = -1,
5823         .use_clustering = ENABLE_CLUSTERING,
5824         .eh_device_reset_handler = pqi_eh_device_reset_handler,
5825         .ioctl = pqi_ioctl,
5826         .slave_alloc = pqi_slave_alloc,
5827         .map_queues = pqi_map_queues,
5828         .sdev_attrs = pqi_sdev_attrs,
5829         .shost_attrs = pqi_shost_attrs,
5830 };
5831
5832 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
5833 {
5834         int rc;
5835         struct Scsi_Host *shost;
5836
5837         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
5838         if (!shost) {
5839                 dev_err(&ctrl_info->pci_dev->dev,
5840                         "scsi_host_alloc failed for controller %u\n",
5841                         ctrl_info->ctrl_id);
5842                 return -ENOMEM;
5843         }
5844
5845         shost->io_port = 0;
5846         shost->n_io_port = 0;
5847         shost->this_id = -1;
5848         shost->max_channel = PQI_MAX_BUS;
5849         shost->max_cmd_len = MAX_COMMAND_SIZE;
5850         shost->max_lun = ~0;
5851         shost->max_id = ~0;
5852         shost->max_sectors = ctrl_info->max_sectors;
5853         shost->can_queue = ctrl_info->scsi_ml_can_queue;
5854         shost->cmd_per_lun = shost->can_queue;
5855         shost->sg_tablesize = ctrl_info->sg_tablesize;
5856         shost->transportt = pqi_sas_transport_template;
5857         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
5858         shost->unique_id = shost->irq;
5859         shost->nr_hw_queues = ctrl_info->num_queue_groups;
5860         shost->hostdata[0] = (unsigned long)ctrl_info;
5861
5862         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
5863         if (rc) {
5864                 dev_err(&ctrl_info->pci_dev->dev,
5865                         "scsi_add_host failed for controller %u\n",
5866                         ctrl_info->ctrl_id);
5867                 goto free_host;
5868         }
5869
5870         rc = pqi_add_sas_host(shost, ctrl_info);
5871         if (rc) {
5872                 dev_err(&ctrl_info->pci_dev->dev,
5873                         "add SAS host failed for controller %u\n",
5874                         ctrl_info->ctrl_id);
5875                 goto remove_host;
5876         }
5877
5878         ctrl_info->scsi_host = shost;
5879
5880         return 0;
5881
5882 remove_host:
5883         scsi_remove_host(shost);
5884 free_host:
5885         scsi_host_put(shost);
5886
5887         return rc;
5888 }
5889
5890 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
5891 {
5892         struct Scsi_Host *shost;
5893
5894         pqi_delete_sas_host(ctrl_info);
5895
5896         shost = ctrl_info->scsi_host;
5897         if (!shost)
5898                 return;
5899
5900         scsi_remove_host(shost);
5901         scsi_host_put(shost);
5902 }
5903
5904 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
5905 {
5906         int rc = 0;
5907         struct pqi_device_registers __iomem *pqi_registers;
5908         unsigned long timeout;
5909         unsigned int timeout_msecs;
5910         union pqi_reset_register reset_reg;
5911
5912         pqi_registers = ctrl_info->pqi_registers;
5913         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
5914         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
5915
5916         while (1) {
5917                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
5918                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
5919                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
5920                         break;
5921                 pqi_check_ctrl_health(ctrl_info);
5922                 if (pqi_ctrl_offline(ctrl_info)) {
5923                         rc = -ENXIO;
5924                         break;
5925                 }
5926                 if (time_after(jiffies, timeout)) {
5927                         rc = -ETIMEDOUT;
5928                         break;
5929                 }
5930         }
5931
5932         return rc;
5933 }
5934
5935 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
5936 {
5937         int rc;
5938         union pqi_reset_register reset_reg;
5939
5940         if (ctrl_info->pqi_reset_quiesce_supported) {
5941                 rc = sis_pqi_reset_quiesce(ctrl_info);
5942                 if (rc) {
5943                         dev_err(&ctrl_info->pci_dev->dev,
5944                                 "PQI reset failed during quiesce with error %d\n",
5945                                 rc);
5946                         return rc;
5947                 }
5948         }
5949
5950         reset_reg.all_bits = 0;
5951         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
5952         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
5953
5954         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
5955
5956         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
5957         if (rc)
5958                 dev_err(&ctrl_info->pci_dev->dev,
5959                         "PQI reset failed with error %d\n", rc);
5960
5961         return rc;
5962 }
5963
5964 static int pqi_get_ctrl_firmware_version(struct pqi_ctrl_info *ctrl_info)
5965 {
5966         int rc;
5967         struct bmic_identify_controller *identify;
5968
5969         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
5970         if (!identify)
5971                 return -ENOMEM;
5972
5973         rc = pqi_identify_controller(ctrl_info, identify);
5974         if (rc)
5975                 goto out;
5976
5977         memcpy(ctrl_info->firmware_version, identify->firmware_version,
5978                 sizeof(identify->firmware_version));
5979         ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
5980         snprintf(ctrl_info->firmware_version +
5981                 strlen(ctrl_info->firmware_version),
5982                 sizeof(ctrl_info->firmware_version),
5983                 "-%u", get_unaligned_le16(&identify->firmware_build_number));
5984
5985 out:
5986         kfree(identify);
5987
5988         return rc;
5989 }
5990
5991 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
5992 {
5993         u32 table_length;
5994         u32 section_offset;
5995         void __iomem *table_iomem_addr;
5996         struct pqi_config_table *config_table;
5997         struct pqi_config_table_section_header *section;
5998
5999         table_length = ctrl_info->config_table_length;
6000
6001         config_table = kmalloc(table_length, GFP_KERNEL);
6002         if (!config_table) {
6003                 dev_err(&ctrl_info->pci_dev->dev,
6004                         "failed to allocate memory for PQI configuration table\n");
6005                 return -ENOMEM;
6006         }
6007
6008         /*
6009          * Copy the config table contents from I/O memory space into the
6010          * temporary buffer.
6011          */
6012         table_iomem_addr = ctrl_info->iomem_base +
6013                 ctrl_info->config_table_offset;
6014         memcpy_fromio(config_table, table_iomem_addr, table_length);
6015
6016         section_offset =
6017                 get_unaligned_le32(&config_table->first_section_offset);
6018
6019         while (section_offset) {
6020                 section = (void *)config_table + section_offset;
6021
6022                 switch (get_unaligned_le16(&section->section_id)) {
6023                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
6024                         if (pqi_disable_heartbeat)
6025                                 dev_warn(&ctrl_info->pci_dev->dev,
6026                                 "heartbeat disabled by module parameter\n");
6027                         else
6028                                 ctrl_info->heartbeat_counter =
6029                                         table_iomem_addr +
6030                                         section_offset +
6031                                         offsetof(
6032                                         struct pqi_config_table_heartbeat,
6033                                                 heartbeat_counter);
6034                         break;
6035                 }
6036
6037                 section_offset =
6038                         get_unaligned_le16(&section->next_section_offset);
6039         }
6040
6041         kfree(config_table);
6042
6043         return 0;
6044 }
6045
6046 /* Switches the controller from PQI mode back into SIS mode. */
6047
6048 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
6049 {
6050         int rc;
6051
6052         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
6053         rc = pqi_reset(ctrl_info);
6054         if (rc)
6055                 return rc;
6056         rc = sis_reenable_sis_mode(ctrl_info);
6057         if (rc) {
6058                 dev_err(&ctrl_info->pci_dev->dev,
6059                         "re-enabling SIS mode failed with error %d\n", rc);
6060                 return rc;
6061         }
6062         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6063
6064         return 0;
6065 }
6066
6067 /*
6068  * If the controller isn't already in SIS mode, this function forces it into
6069  * SIS mode.
6070  */
6071
6072 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
6073 {
6074         if (!sis_is_firmware_running(ctrl_info))
6075                 return -ENXIO;
6076
6077         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
6078                 return 0;
6079
6080         if (sis_is_kernel_up(ctrl_info)) {
6081                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6082                 return 0;
6083         }
6084
6085         return pqi_revert_to_sis_mode(ctrl_info);
6086 }
6087
6088 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
6089 {
6090         int rc;
6091
6092         rc = pqi_force_sis_mode(ctrl_info);
6093         if (rc)
6094                 return rc;
6095
6096         /*
6097          * Wait until the controller is ready to start accepting SIS
6098          * commands.
6099          */
6100         rc = sis_wait_for_ctrl_ready(ctrl_info);
6101         if (rc)
6102                 return rc;
6103
6104         /*
6105          * Get the controller properties.  This allows us to determine
6106          * whether or not it supports PQI mode.
6107          */
6108         rc = sis_get_ctrl_properties(ctrl_info);
6109         if (rc) {
6110                 dev_err(&ctrl_info->pci_dev->dev,
6111                         "error obtaining controller properties\n");
6112                 return rc;
6113         }
6114
6115         rc = sis_get_pqi_capabilities(ctrl_info);
6116         if (rc) {
6117                 dev_err(&ctrl_info->pci_dev->dev,
6118                         "error obtaining controller capabilities\n");
6119                 return rc;
6120         }
6121
6122         if (reset_devices) {
6123                 if (ctrl_info->max_outstanding_requests >
6124                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
6125                         ctrl_info->max_outstanding_requests =
6126                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
6127         } else {
6128                 if (ctrl_info->max_outstanding_requests >
6129                         PQI_MAX_OUTSTANDING_REQUESTS)
6130                         ctrl_info->max_outstanding_requests =
6131                                         PQI_MAX_OUTSTANDING_REQUESTS;
6132         }
6133
6134         pqi_calculate_io_resources(ctrl_info);
6135
6136         rc = pqi_alloc_error_buffer(ctrl_info);
6137         if (rc) {
6138                 dev_err(&ctrl_info->pci_dev->dev,
6139                         "failed to allocate PQI error buffer\n");
6140                 return rc;
6141         }
6142
6143         /*
6144          * If the function we are about to call succeeds, the
6145          * controller will transition from legacy SIS mode
6146          * into PQI mode.
6147          */
6148         rc = sis_init_base_struct_addr(ctrl_info);
6149         if (rc) {
6150                 dev_err(&ctrl_info->pci_dev->dev,
6151                         "error initializing PQI mode\n");
6152                 return rc;
6153         }
6154
6155         /* Wait for the controller to complete the SIS -> PQI transition. */
6156         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6157         if (rc) {
6158                 dev_err(&ctrl_info->pci_dev->dev,
6159                         "transition to PQI mode failed\n");
6160                 return rc;
6161         }
6162
6163         /* From here on, we are running in PQI mode. */
6164         ctrl_info->pqi_mode_enabled = true;
6165         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6166
6167         rc = pqi_process_config_table(ctrl_info);
6168         if (rc)
6169                 return rc;
6170
6171         rc = pqi_alloc_admin_queues(ctrl_info);
6172         if (rc) {
6173                 dev_err(&ctrl_info->pci_dev->dev,
6174                         "failed to allocate admin queues\n");
6175                 return rc;
6176         }
6177
6178         rc = pqi_create_admin_queues(ctrl_info);
6179         if (rc) {
6180                 dev_err(&ctrl_info->pci_dev->dev,
6181                         "error creating admin queues\n");
6182                 return rc;
6183         }
6184
6185         rc = pqi_report_device_capability(ctrl_info);
6186         if (rc) {
6187                 dev_err(&ctrl_info->pci_dev->dev,
6188                         "obtaining device capability failed\n");
6189                 return rc;
6190         }
6191
6192         rc = pqi_validate_device_capability(ctrl_info);
6193         if (rc)
6194                 return rc;
6195
6196         pqi_calculate_queue_resources(ctrl_info);
6197
6198         rc = pqi_enable_msix_interrupts(ctrl_info);
6199         if (rc)
6200                 return rc;
6201
6202         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
6203                 ctrl_info->max_msix_vectors =
6204                         ctrl_info->num_msix_vectors_enabled;
6205                 pqi_calculate_queue_resources(ctrl_info);
6206         }
6207
6208         rc = pqi_alloc_io_resources(ctrl_info);
6209         if (rc)
6210                 return rc;
6211
6212         rc = pqi_alloc_operational_queues(ctrl_info);
6213         if (rc) {
6214                 dev_err(&ctrl_info->pci_dev->dev,
6215                         "failed to allocate operational queues\n");
6216                 return rc;
6217         }
6218
6219         pqi_init_operational_queues(ctrl_info);
6220
6221         rc = pqi_request_irqs(ctrl_info);
6222         if (rc)
6223                 return rc;
6224
6225         rc = pqi_create_queues(ctrl_info);
6226         if (rc)
6227                 return rc;
6228
6229         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6230
6231         ctrl_info->controller_online = true;
6232         pqi_start_heartbeat_timer(ctrl_info);
6233
6234         rc = pqi_enable_events(ctrl_info);
6235         if (rc) {
6236                 dev_err(&ctrl_info->pci_dev->dev,
6237                         "error enabling events\n");
6238                 return rc;
6239         }
6240
6241         /* Register with the SCSI subsystem. */
6242         rc = pqi_register_scsi(ctrl_info);
6243         if (rc)
6244                 return rc;
6245
6246         rc = pqi_get_ctrl_firmware_version(ctrl_info);
6247         if (rc) {
6248                 dev_err(&ctrl_info->pci_dev->dev,
6249                         "error obtaining firmware version\n");
6250                 return rc;
6251         }
6252
6253         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6254         if (rc) {
6255                 dev_err(&ctrl_info->pci_dev->dev,
6256                         "error updating host wellness\n");
6257                 return rc;
6258         }
6259
6260         pqi_schedule_update_time_worker(ctrl_info);
6261
6262         pqi_scan_scsi_devices(ctrl_info);
6263
6264         return 0;
6265 }
6266
6267 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
6268 {
6269         unsigned int i;
6270         struct pqi_admin_queues *admin_queues;
6271         struct pqi_event_queue *event_queue;
6272
6273         admin_queues = &ctrl_info->admin_queues;
6274         admin_queues->iq_pi_copy = 0;
6275         admin_queues->oq_ci_copy = 0;
6276         *admin_queues->oq_pi = 0;
6277
6278         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6279                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
6280                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
6281                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
6282
6283                 *ctrl_info->queue_groups[i].iq_ci[RAID_PATH] = 0;
6284                 *ctrl_info->queue_groups[i].iq_ci[AIO_PATH] = 0;
6285                 *ctrl_info->queue_groups[i].oq_pi = 0;
6286         }
6287
6288         event_queue = &ctrl_info->event_queue;
6289         *event_queue->oq_pi = 0;
6290         event_queue->oq_ci_copy = 0;
6291 }
6292
6293 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
6294 {
6295         int rc;
6296
6297         rc = pqi_force_sis_mode(ctrl_info);
6298         if (rc)
6299                 return rc;
6300
6301         /*
6302          * Wait until the controller is ready to start accepting SIS
6303          * commands.
6304          */
6305         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
6306         if (rc)
6307                 return rc;
6308
6309         /*
6310          * If the function we are about to call succeeds, the
6311          * controller will transition from legacy SIS mode
6312          * into PQI mode.
6313          */
6314         rc = sis_init_base_struct_addr(ctrl_info);
6315         if (rc) {
6316                 dev_err(&ctrl_info->pci_dev->dev,
6317                         "error initializing PQI mode\n");
6318                 return rc;
6319         }
6320
6321         /* Wait for the controller to complete the SIS -> PQI transition. */
6322         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6323         if (rc) {
6324                 dev_err(&ctrl_info->pci_dev->dev,
6325                         "transition to PQI mode failed\n");
6326                 return rc;
6327         }
6328
6329         /* From here on, we are running in PQI mode. */
6330         ctrl_info->pqi_mode_enabled = true;
6331         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6332
6333         pqi_reinit_queues(ctrl_info);
6334
6335         rc = pqi_create_admin_queues(ctrl_info);
6336         if (rc) {
6337                 dev_err(&ctrl_info->pci_dev->dev,
6338                         "error creating admin queues\n");
6339                 return rc;
6340         }
6341
6342         rc = pqi_create_queues(ctrl_info);
6343         if (rc)
6344                 return rc;
6345
6346         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6347
6348         ctrl_info->controller_online = true;
6349         pqi_start_heartbeat_timer(ctrl_info);
6350         pqi_ctrl_unblock_requests(ctrl_info);
6351
6352         rc = pqi_enable_events(ctrl_info);
6353         if (rc) {
6354                 dev_err(&ctrl_info->pci_dev->dev,
6355                         "error enabling events\n");
6356                 return rc;
6357         }
6358
6359         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6360         if (rc) {
6361                 dev_err(&ctrl_info->pci_dev->dev,
6362                         "error updating host wellness\n");
6363                 return rc;
6364         }
6365
6366         pqi_schedule_update_time_worker(ctrl_info);
6367
6368         pqi_scan_scsi_devices(ctrl_info);
6369
6370         return 0;
6371 }
6372
6373 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev,
6374         u16 timeout)
6375 {
6376         return pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
6377                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
6378 }
6379
6380 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
6381 {
6382         int rc;
6383         u64 mask;
6384
6385         rc = pci_enable_device(ctrl_info->pci_dev);
6386         if (rc) {
6387                 dev_err(&ctrl_info->pci_dev->dev,
6388                         "failed to enable PCI device\n");
6389                 return rc;
6390         }
6391
6392         if (sizeof(dma_addr_t) > 4)
6393                 mask = DMA_BIT_MASK(64);
6394         else
6395                 mask = DMA_BIT_MASK(32);
6396
6397         rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask);
6398         if (rc) {
6399                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
6400                 goto disable_device;
6401         }
6402
6403         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
6404         if (rc) {
6405                 dev_err(&ctrl_info->pci_dev->dev,
6406                         "failed to obtain PCI resources\n");
6407                 goto disable_device;
6408         }
6409
6410         ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
6411                 ctrl_info->pci_dev, 0),
6412                 sizeof(struct pqi_ctrl_registers));
6413         if (!ctrl_info->iomem_base) {
6414                 dev_err(&ctrl_info->pci_dev->dev,
6415                         "failed to map memory for controller registers\n");
6416                 rc = -ENOMEM;
6417                 goto release_regions;
6418         }
6419
6420 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
6421
6422         /* Increase the PCIe completion timeout. */
6423         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
6424                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
6425         if (rc) {
6426                 dev_err(&ctrl_info->pci_dev->dev,
6427                         "failed to set PCIe completion timeout\n");
6428                 goto release_regions;
6429         }
6430
6431         /* Enable bus mastering. */
6432         pci_set_master(ctrl_info->pci_dev);
6433
6434         ctrl_info->registers = ctrl_info->iomem_base;
6435         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
6436
6437         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
6438
6439         return 0;
6440
6441 release_regions:
6442         pci_release_regions(ctrl_info->pci_dev);
6443 disable_device:
6444         pci_disable_device(ctrl_info->pci_dev);
6445
6446         return rc;
6447 }
6448
6449 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
6450 {
6451         iounmap(ctrl_info->iomem_base);
6452         pci_release_regions(ctrl_info->pci_dev);
6453         if (pci_is_enabled(ctrl_info->pci_dev))
6454                 pci_disable_device(ctrl_info->pci_dev);
6455         pci_set_drvdata(ctrl_info->pci_dev, NULL);
6456 }
6457
6458 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
6459 {
6460         struct pqi_ctrl_info *ctrl_info;
6461
6462         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
6463                         GFP_KERNEL, numa_node);
6464         if (!ctrl_info)
6465                 return NULL;
6466
6467         mutex_init(&ctrl_info->scan_mutex);
6468         mutex_init(&ctrl_info->lun_reset_mutex);
6469
6470         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
6471         spin_lock_init(&ctrl_info->scsi_device_list_lock);
6472
6473         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
6474         atomic_set(&ctrl_info->num_interrupts, 0);
6475
6476         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
6477         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
6478
6479         init_timer(&ctrl_info->heartbeat_timer);
6480         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
6481
6482         sema_init(&ctrl_info->sync_request_sem,
6483                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
6484         init_waitqueue_head(&ctrl_info->block_requests_wait);
6485
6486         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
6487         spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock);
6488         INIT_WORK(&ctrl_info->raid_bypass_retry_work,
6489                 pqi_raid_bypass_retry_worker);
6490
6491         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
6492         ctrl_info->irq_mode = IRQ_MODE_NONE;
6493         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
6494
6495         return ctrl_info;
6496 }
6497
6498 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
6499 {
6500         kfree(ctrl_info);
6501 }
6502
6503 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
6504 {
6505         pqi_free_irqs(ctrl_info);
6506         pqi_disable_msix_interrupts(ctrl_info);
6507 }
6508
6509 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
6510 {
6511         pqi_stop_heartbeat_timer(ctrl_info);
6512         pqi_free_interrupts(ctrl_info);
6513         if (ctrl_info->queue_memory_base)
6514                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6515                         ctrl_info->queue_memory_length,
6516                         ctrl_info->queue_memory_base,
6517                         ctrl_info->queue_memory_base_dma_handle);
6518         if (ctrl_info->admin_queue_memory_base)
6519                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6520                         ctrl_info->admin_queue_memory_length,
6521                         ctrl_info->admin_queue_memory_base,
6522                         ctrl_info->admin_queue_memory_base_dma_handle);
6523         pqi_free_all_io_requests(ctrl_info);
6524         if (ctrl_info->error_buffer)
6525                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6526                         ctrl_info->error_buffer_length,
6527                         ctrl_info->error_buffer,
6528                         ctrl_info->error_buffer_dma_handle);
6529         if (ctrl_info->iomem_base)
6530                 pqi_cleanup_pci_init(ctrl_info);
6531         pqi_free_ctrl_info(ctrl_info);
6532 }
6533
6534 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
6535 {
6536         pqi_cancel_rescan_worker(ctrl_info);
6537         pqi_cancel_update_time_worker(ctrl_info);
6538         pqi_remove_all_scsi_devices(ctrl_info);
6539         pqi_unregister_scsi(ctrl_info);
6540         if (ctrl_info->pqi_mode_enabled)
6541                 pqi_revert_to_sis_mode(ctrl_info);
6542         pqi_free_ctrl_resources(ctrl_info);
6543 }
6544
6545 static void pqi_perform_lockup_action(void)
6546 {
6547         switch (pqi_lockup_action) {
6548         case PANIC:
6549                 panic("FATAL: Smart Family Controller lockup detected");
6550                 break;
6551         case REBOOT:
6552                 emergency_restart();
6553                 break;
6554         case NONE:
6555         default:
6556                 break;
6557         }
6558 }
6559
6560 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
6561         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
6562         .status = SAM_STAT_CHECK_CONDITION,
6563 };
6564
6565 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
6566 {
6567         unsigned int i;
6568         struct pqi_io_request *io_request;
6569         struct scsi_cmnd *scmd;
6570
6571         for (i = 0; i < ctrl_info->max_io_slots; i++) {
6572                 io_request = &ctrl_info->io_request_pool[i];
6573                 if (atomic_read(&io_request->refcount) == 0)
6574                         continue;
6575
6576                 scmd = io_request->scmd;
6577                 if (scmd) {
6578                         set_host_byte(scmd, DID_NO_CONNECT);
6579                 } else {
6580                         io_request->status = -ENXIO;
6581                         io_request->error_info =
6582                                 &pqi_ctrl_offline_raid_error_info;
6583                 }
6584
6585                 io_request->io_complete_callback(io_request,
6586                         io_request->context);
6587         }
6588 }
6589
6590 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
6591 {
6592         pqi_perform_lockup_action();
6593         pqi_stop_heartbeat_timer(ctrl_info);
6594         pqi_free_interrupts(ctrl_info);
6595         pqi_cancel_rescan_worker(ctrl_info);
6596         pqi_cancel_update_time_worker(ctrl_info);
6597         pqi_ctrl_wait_until_quiesced(ctrl_info);
6598         pqi_fail_all_outstanding_requests(ctrl_info);
6599         pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
6600         pqi_ctrl_unblock_requests(ctrl_info);
6601 }
6602
6603 static void pqi_ctrl_offline_worker(struct work_struct *work)
6604 {
6605         struct pqi_ctrl_info *ctrl_info;
6606
6607         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
6608         pqi_take_ctrl_offline_deferred(ctrl_info);
6609 }
6610
6611 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
6612 {
6613         if (!ctrl_info->controller_online)
6614                 return;
6615
6616         ctrl_info->controller_online = false;
6617         ctrl_info->pqi_mode_enabled = false;
6618         pqi_ctrl_block_requests(ctrl_info);
6619         if (!pqi_disable_ctrl_shutdown)
6620                 sis_shutdown_ctrl(ctrl_info);
6621         pci_disable_device(ctrl_info->pci_dev);
6622         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
6623         schedule_work(&ctrl_info->ctrl_offline_work);
6624 }
6625
6626 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
6627         const struct pci_device_id *id)
6628 {
6629         char *ctrl_description;
6630
6631         if (id->driver_data)
6632                 ctrl_description = (char *)id->driver_data;
6633         else
6634                 ctrl_description = "Microsemi Smart Family Controller";
6635
6636         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
6637 }
6638
6639 static int pqi_pci_probe(struct pci_dev *pci_dev,
6640         const struct pci_device_id *id)
6641 {
6642         int rc;
6643         int node;
6644         struct pqi_ctrl_info *ctrl_info;
6645
6646         pqi_print_ctrl_info(pci_dev, id);
6647
6648         if (pqi_disable_device_id_wildcards &&
6649                 id->subvendor == PCI_ANY_ID &&
6650                 id->subdevice == PCI_ANY_ID) {
6651                 dev_warn(&pci_dev->dev,
6652                         "controller not probed because device ID wildcards are disabled\n");
6653                 return -ENODEV;
6654         }
6655
6656         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
6657                 dev_warn(&pci_dev->dev,
6658                         "controller device ID matched using wildcards\n");
6659
6660         node = dev_to_node(&pci_dev->dev);
6661         if (node == NUMA_NO_NODE)
6662                 set_dev_node(&pci_dev->dev, 0);
6663
6664         ctrl_info = pqi_alloc_ctrl_info(node);
6665         if (!ctrl_info) {
6666                 dev_err(&pci_dev->dev,
6667                         "failed to allocate controller info block\n");
6668                 return -ENOMEM;
6669         }
6670
6671         ctrl_info->pci_dev = pci_dev;
6672
6673         rc = pqi_pci_init(ctrl_info);
6674         if (rc)
6675                 goto error;
6676
6677         rc = pqi_ctrl_init(ctrl_info);
6678         if (rc)
6679                 goto error;
6680
6681         return 0;
6682
6683 error:
6684         pqi_remove_ctrl(ctrl_info);
6685
6686         return rc;
6687 }
6688
6689 static void pqi_pci_remove(struct pci_dev *pci_dev)
6690 {
6691         struct pqi_ctrl_info *ctrl_info;
6692
6693         ctrl_info = pci_get_drvdata(pci_dev);
6694         if (!ctrl_info)
6695                 return;
6696
6697         pqi_remove_ctrl(ctrl_info);
6698 }
6699
6700 static void pqi_shutdown(struct pci_dev *pci_dev)
6701 {
6702         int rc;
6703         struct pqi_ctrl_info *ctrl_info;
6704
6705         ctrl_info = pci_get_drvdata(pci_dev);
6706         if (!ctrl_info)
6707                 goto error;
6708
6709         /*
6710          * Write all data in the controller's battery-backed cache to
6711          * storage.
6712          */
6713         rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
6714         pqi_free_interrupts(ctrl_info);
6715         pqi_reset(ctrl_info);
6716         if (rc == 0)
6717                 return;
6718
6719 error:
6720         dev_warn(&pci_dev->dev,
6721                 "unable to flush controller cache\n");
6722 }
6723
6724 static void pqi_process_lockup_action_param(void)
6725 {
6726         unsigned int i;
6727
6728         if (!pqi_lockup_action_param)
6729                 return;
6730
6731         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6732                 if (strcmp(pqi_lockup_action_param,
6733                         pqi_lockup_actions[i].name) == 0) {
6734                         pqi_lockup_action = pqi_lockup_actions[i].action;
6735                         return;
6736                 }
6737         }
6738
6739         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
6740                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
6741 }
6742
6743 static void pqi_process_module_params(void)
6744 {
6745         pqi_process_lockup_action_param();
6746 }
6747
6748 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
6749 {
6750         struct pqi_ctrl_info *ctrl_info;
6751
6752         ctrl_info = pci_get_drvdata(pci_dev);
6753
6754         pqi_disable_events(ctrl_info);
6755         pqi_cancel_update_time_worker(ctrl_info);
6756         pqi_cancel_rescan_worker(ctrl_info);
6757         pqi_wait_until_scan_finished(ctrl_info);
6758         pqi_wait_until_lun_reset_finished(ctrl_info);
6759         pqi_flush_cache(ctrl_info, SUSPEND);
6760         pqi_ctrl_block_requests(ctrl_info);
6761         pqi_ctrl_wait_until_quiesced(ctrl_info);
6762         pqi_wait_until_inbound_queues_empty(ctrl_info);
6763         pqi_ctrl_wait_for_pending_io(ctrl_info);
6764         pqi_stop_heartbeat_timer(ctrl_info);
6765
6766         if (state.event == PM_EVENT_FREEZE)
6767                 return 0;
6768
6769         pci_save_state(pci_dev);
6770         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
6771
6772         ctrl_info->controller_online = false;
6773         ctrl_info->pqi_mode_enabled = false;
6774
6775         return 0;
6776 }
6777
6778 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
6779 {
6780         int rc;
6781         struct pqi_ctrl_info *ctrl_info;
6782
6783         ctrl_info = pci_get_drvdata(pci_dev);
6784
6785         if (pci_dev->current_state != PCI_D0) {
6786                 ctrl_info->max_hw_queue_index = 0;
6787                 pqi_free_interrupts(ctrl_info);
6788                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
6789                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
6790                         IRQF_SHARED, DRIVER_NAME_SHORT,
6791                         &ctrl_info->queue_groups[0]);
6792                 if (rc) {
6793                         dev_err(&ctrl_info->pci_dev->dev,
6794                                 "irq %u init failed with error %d\n",
6795                                 pci_dev->irq, rc);
6796                         return rc;
6797                 }
6798                 pqi_start_heartbeat_timer(ctrl_info);
6799                 pqi_ctrl_unblock_requests(ctrl_info);
6800                 return 0;
6801         }
6802
6803         pci_set_power_state(pci_dev, PCI_D0);
6804         pci_restore_state(pci_dev);
6805
6806         return pqi_ctrl_init_resume(ctrl_info);
6807 }
6808
6809 /* Define the PCI IDs for the controllers that we support. */
6810 static const struct pci_device_id pqi_pci_id_table[] = {
6811         {
6812                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6813                                0x152d, 0x8a22)
6814         },
6815         {
6816                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6817                                0x152d, 0x8a23)
6818         },
6819         {
6820                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6821                                0x152d, 0x8a24)
6822         },
6823         {
6824                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6825                                0x152d, 0x8a36)
6826         },
6827         {
6828                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6829                                0x152d, 0x8a37)
6830         },
6831         {
6832                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6833                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
6834         },
6835         {
6836                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6837                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
6838         },
6839         {
6840                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6841                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
6842         },
6843         {
6844                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6845                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
6846         },
6847         {
6848                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6849                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
6850         },
6851         {
6852                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6853                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
6854         },
6855         {
6856                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6857                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
6858         },
6859         {
6860                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6861                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
6862         },
6863         {
6864                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6865                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
6866         },
6867         {
6868                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6869                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
6870         },
6871         {
6872                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6873                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
6874         },
6875         {
6876                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6877                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
6878         },
6879         {
6880                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6881                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
6882         },
6883         {
6884                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6885                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
6886         },
6887         {
6888                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6889                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
6890         },
6891         {
6892                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6893                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
6894         },
6895         {
6896                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6897                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
6898         },
6899         {
6900                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6901                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
6902         },
6903         {
6904                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6905                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
6906         },
6907         {
6908                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6909                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
6910         },
6911         {
6912                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6913                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
6914         },
6915         {
6916                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6917                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
6918         },
6919         {
6920                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6921                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
6922         },
6923         {
6924                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6925                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
6926         },
6927         {
6928                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6929                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
6930         },
6931         {
6932                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6933                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
6934         },
6935         {
6936                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6937                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
6938         },
6939         {
6940                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6941                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
6942         },
6943         {
6944                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6945                                PCI_VENDOR_ID_DELL, 0x1fe0)
6946         },
6947         {
6948                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6949                                PCI_VENDOR_ID_HP, 0x0600)
6950         },
6951         {
6952                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6953                                PCI_VENDOR_ID_HP, 0x0601)
6954         },
6955         {
6956                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6957                                PCI_VENDOR_ID_HP, 0x0602)
6958         },
6959         {
6960                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6961                                PCI_VENDOR_ID_HP, 0x0603)
6962         },
6963         {
6964                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6965                                PCI_VENDOR_ID_HP, 0x0609)
6966         },
6967         {
6968                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6969                                PCI_VENDOR_ID_HP, 0x0650)
6970         },
6971         {
6972                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6973                                PCI_VENDOR_ID_HP, 0x0651)
6974         },
6975         {
6976                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6977                                PCI_VENDOR_ID_HP, 0x0652)
6978         },
6979         {
6980                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6981                                PCI_VENDOR_ID_HP, 0x0653)
6982         },
6983         {
6984                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6985                                PCI_VENDOR_ID_HP, 0x0654)
6986         },
6987         {
6988                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6989                                PCI_VENDOR_ID_HP, 0x0655)
6990         },
6991         {
6992                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6993                                PCI_VENDOR_ID_HP, 0x0700)
6994         },
6995         {
6996                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6997                                PCI_VENDOR_ID_HP, 0x0701)
6998         },
6999         {
7000                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7001                                PCI_VENDOR_ID_HP, 0x1001)
7002         },
7003         {
7004                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7005                                PCI_VENDOR_ID_HP, 0x1100)
7006         },
7007         {
7008                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7009                                PCI_VENDOR_ID_HP, 0x1101)
7010         },
7011         {
7012                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7013                                PCI_ANY_ID, PCI_ANY_ID)
7014         },
7015         { 0 }
7016 };
7017
7018 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
7019
7020 static struct pci_driver pqi_pci_driver = {
7021         .name = DRIVER_NAME_SHORT,
7022         .id_table = pqi_pci_id_table,
7023         .probe = pqi_pci_probe,
7024         .remove = pqi_pci_remove,
7025         .shutdown = pqi_shutdown,
7026 #if defined(CONFIG_PM)
7027         .suspend = pqi_suspend,
7028         .resume = pqi_resume,
7029 #endif
7030 };
7031
7032 static int __init pqi_init(void)
7033 {
7034         int rc;
7035
7036         pr_info(DRIVER_NAME "\n");
7037
7038         pqi_sas_transport_template =
7039                 sas_attach_transport(&pqi_sas_transport_functions);
7040         if (!pqi_sas_transport_template)
7041                 return -ENODEV;
7042
7043         pqi_process_module_params();
7044
7045         rc = pci_register_driver(&pqi_pci_driver);
7046         if (rc)
7047                 sas_release_transport(pqi_sas_transport_template);
7048
7049         return rc;
7050 }
7051
7052 static void __exit pqi_cleanup(void)
7053 {
7054         pci_unregister_driver(&pqi_pci_driver);
7055         sas_release_transport(pqi_sas_transport_template);
7056 }
7057
7058 module_init(pqi_init);
7059 module_exit(pqi_cleanup);
7060
7061 static void __attribute__((unused)) verify_structures(void)
7062 {
7063         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7064                 sis_host_to_ctrl_doorbell) != 0x20);
7065         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7066                 sis_interrupt_mask) != 0x34);
7067         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7068                 sis_ctrl_to_host_doorbell) != 0x9c);
7069         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7070                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
7071         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7072                 sis_driver_scratch) != 0xb0);
7073         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7074                 sis_firmware_status) != 0xbc);
7075         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7076                 sis_mailbox) != 0x1000);
7077         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7078                 pqi_registers) != 0x4000);
7079
7080         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7081                 iu_type) != 0x0);
7082         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7083                 iu_length) != 0x2);
7084         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7085                 response_queue_id) != 0x4);
7086         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7087                 work_area) != 0x6);
7088         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
7089
7090         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7091                 status) != 0x0);
7092         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7093                 service_response) != 0x1);
7094         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7095                 data_present) != 0x2);
7096         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7097                 reserved) != 0x3);
7098         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7099                 residual_count) != 0x4);
7100         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7101                 data_length) != 0x8);
7102         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7103                 reserved1) != 0xa);
7104         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7105                 data) != 0xc);
7106         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
7107
7108         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7109                 data_in_result) != 0x0);
7110         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7111                 data_out_result) != 0x1);
7112         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7113                 reserved) != 0x2);
7114         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7115                 status) != 0x5);
7116         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7117                 status_qualifier) != 0x6);
7118         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7119                 sense_data_length) != 0x8);
7120         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7121                 response_data_length) != 0xa);
7122         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7123                 data_in_transferred) != 0xc);
7124         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7125                 data_out_transferred) != 0x10);
7126         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7127                 data) != 0x14);
7128         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
7129
7130         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7131                 signature) != 0x0);
7132         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7133                 function_and_status_code) != 0x8);
7134         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7135                 max_admin_iq_elements) != 0x10);
7136         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7137                 max_admin_oq_elements) != 0x11);
7138         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7139                 admin_iq_element_length) != 0x12);
7140         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7141                 admin_oq_element_length) != 0x13);
7142         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7143                 max_reset_timeout) != 0x14);
7144         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7145                 legacy_intx_status) != 0x18);
7146         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7147                 legacy_intx_mask_set) != 0x1c);
7148         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7149                 legacy_intx_mask_clear) != 0x20);
7150         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7151                 device_status) != 0x40);
7152         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7153                 admin_iq_pi_offset) != 0x48);
7154         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7155                 admin_oq_ci_offset) != 0x50);
7156         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7157                 admin_iq_element_array_addr) != 0x58);
7158         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7159                 admin_oq_element_array_addr) != 0x60);
7160         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7161                 admin_iq_ci_addr) != 0x68);
7162         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7163                 admin_oq_pi_addr) != 0x70);
7164         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7165                 admin_iq_num_elements) != 0x78);
7166         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7167                 admin_oq_num_elements) != 0x79);
7168         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7169                 admin_queue_int_msg_num) != 0x7a);
7170         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7171                 device_error) != 0x80);
7172         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7173                 error_details) != 0x88);
7174         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7175                 device_reset) != 0x90);
7176         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7177                 power_action) != 0x94);
7178         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
7179
7180         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7181                 header.iu_type) != 0);
7182         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7183                 header.iu_length) != 2);
7184         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7185                 header.work_area) != 6);
7186         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7187                 request_id) != 8);
7188         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7189                 function_code) != 10);
7190         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7191                 data.report_device_capability.buffer_length) != 44);
7192         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7193                 data.report_device_capability.sg_descriptor) != 48);
7194         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7195                 data.create_operational_iq.queue_id) != 12);
7196         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7197                 data.create_operational_iq.element_array_addr) != 16);
7198         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7199                 data.create_operational_iq.ci_addr) != 24);
7200         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7201                 data.create_operational_iq.num_elements) != 32);
7202         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7203                 data.create_operational_iq.element_length) != 34);
7204         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7205                 data.create_operational_iq.queue_protocol) != 36);
7206         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7207                 data.create_operational_oq.queue_id) != 12);
7208         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7209                 data.create_operational_oq.element_array_addr) != 16);
7210         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7211                 data.create_operational_oq.pi_addr) != 24);
7212         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7213                 data.create_operational_oq.num_elements) != 32);
7214         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7215                 data.create_operational_oq.element_length) != 34);
7216         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7217                 data.create_operational_oq.queue_protocol) != 36);
7218         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7219                 data.create_operational_oq.int_msg_num) != 40);
7220         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7221                 data.create_operational_oq.coalescing_count) != 42);
7222         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7223                 data.create_operational_oq.min_coalescing_time) != 44);
7224         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7225                 data.create_operational_oq.max_coalescing_time) != 48);
7226         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7227                 data.delete_operational_queue.queue_id) != 12);
7228         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
7229         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7230                 data.create_operational_iq) != 64 - 11);
7231         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7232                 data.create_operational_oq) != 64 - 11);
7233         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7234                 data.delete_operational_queue) != 64 - 11);
7235
7236         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7237                 header.iu_type) != 0);
7238         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7239                 header.iu_length) != 2);
7240         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7241                 header.work_area) != 6);
7242         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7243                 request_id) != 8);
7244         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7245                 function_code) != 10);
7246         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7247                 status) != 11);
7248         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7249                 data.create_operational_iq.status_descriptor) != 12);
7250         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7251                 data.create_operational_iq.iq_pi_offset) != 16);
7252         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7253                 data.create_operational_oq.status_descriptor) != 12);
7254         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7255                 data.create_operational_oq.oq_ci_offset) != 16);
7256         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
7257
7258         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7259                 header.iu_type) != 0);
7260         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7261                 header.iu_length) != 2);
7262         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7263                 header.response_queue_id) != 4);
7264         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7265                 header.work_area) != 6);
7266         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7267                 request_id) != 8);
7268         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7269                 nexus_id) != 10);
7270         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7271                 buffer_length) != 12);
7272         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7273                 lun_number) != 16);
7274         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7275                 protocol_specific) != 24);
7276         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7277                 error_index) != 27);
7278         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7279                 cdb) != 32);
7280         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7281                 sg_descriptors) != 64);
7282         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
7283                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7284
7285         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7286                 header.iu_type) != 0);
7287         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7288                 header.iu_length) != 2);
7289         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7290                 header.response_queue_id) != 4);
7291         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7292                 header.work_area) != 6);
7293         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7294                 request_id) != 8);
7295         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7296                 nexus_id) != 12);
7297         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7298                 buffer_length) != 16);
7299         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7300                 data_encryption_key_index) != 22);
7301         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7302                 encrypt_tweak_lower) != 24);
7303         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7304                 encrypt_tweak_upper) != 28);
7305         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7306                 cdb) != 32);
7307         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7308                 error_index) != 48);
7309         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7310                 num_sg_descriptors) != 50);
7311         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7312                 cdb_length) != 51);
7313         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7314                 lun_number) != 52);
7315         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7316                 sg_descriptors) != 64);
7317         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
7318                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7319
7320         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7321                 header.iu_type) != 0);
7322         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7323                 header.iu_length) != 2);
7324         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7325                 request_id) != 8);
7326         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7327                 error_index) != 10);
7328
7329         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7330                 header.iu_type) != 0);
7331         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7332                 header.iu_length) != 2);
7333         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7334                 header.response_queue_id) != 4);
7335         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7336                 request_id) != 8);
7337         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7338                 data.report_event_configuration.buffer_length) != 12);
7339         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7340                 data.report_event_configuration.sg_descriptors) != 16);
7341         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7342                 data.set_event_configuration.global_event_oq_id) != 10);
7343         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7344                 data.set_event_configuration.buffer_length) != 12);
7345         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7346                 data.set_event_configuration.sg_descriptors) != 16);
7347
7348         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7349                 max_inbound_iu_length) != 6);
7350         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7351                 max_outbound_iu_length) != 14);
7352         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
7353
7354         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7355                 data_length) != 0);
7356         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7357                 iq_arbitration_priority_support_bitmask) != 8);
7358         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7359                 maximum_aw_a) != 9);
7360         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7361                 maximum_aw_b) != 10);
7362         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7363                 maximum_aw_c) != 11);
7364         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7365                 max_inbound_queues) != 16);
7366         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7367                 max_elements_per_iq) != 18);
7368         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7369                 max_iq_element_length) != 24);
7370         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7371                 min_iq_element_length) != 26);
7372         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7373                 max_outbound_queues) != 30);
7374         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7375                 max_elements_per_oq) != 32);
7376         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7377                 intr_coalescing_time_granularity) != 34);
7378         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7379                 max_oq_element_length) != 36);
7380         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7381                 min_oq_element_length) != 38);
7382         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7383                 iu_layer_descriptors) != 64);
7384         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
7385
7386         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7387                 event_type) != 0);
7388         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7389                 oq_id) != 2);
7390         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
7391
7392         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7393                 num_event_descriptors) != 2);
7394         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7395                 descriptors) != 4);
7396
7397         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
7398                 ARRAY_SIZE(pqi_supported_event_types));
7399
7400         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7401                 header.iu_type) != 0);
7402         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7403                 header.iu_length) != 2);
7404         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7405                 event_type) != 8);
7406         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7407                 event_id) != 10);
7408         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7409                 additional_event_id) != 12);
7410         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7411                 data) != 16);
7412         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
7413
7414         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7415                 header.iu_type) != 0);
7416         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7417                 header.iu_length) != 2);
7418         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7419                 event_type) != 8);
7420         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7421                 event_id) != 10);
7422         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7423                 additional_event_id) != 12);
7424         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
7425
7426         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7427                 header.iu_type) != 0);
7428         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7429                 header.iu_length) != 2);
7430         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7431                 request_id) != 8);
7432         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7433                 nexus_id) != 10);
7434         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7435                 lun_number) != 16);
7436         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7437                 protocol_specific) != 24);
7438         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7439                 outbound_queue_id_to_manage) != 26);
7440         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7441                 request_id_to_manage) != 28);
7442         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7443                 task_management_function) != 30);
7444         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
7445
7446         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7447                 header.iu_type) != 0);
7448         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7449                 header.iu_length) != 2);
7450         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7451                 request_id) != 8);
7452         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7453                 nexus_id) != 10);
7454         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7455                 additional_response_info) != 12);
7456         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7457                 response_code) != 15);
7458         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
7459
7460         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7461                 configured_logical_drive_count) != 0);
7462         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7463                 configuration_signature) != 1);
7464         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7465                 firmware_version) != 5);
7466         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7467                 extended_logical_unit_count) != 154);
7468         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7469                 firmware_build_number) != 190);
7470         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7471                 controller_mode) != 292);
7472
7473         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7474                 phys_bay_in_box) != 115);
7475         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7476                 device_type) != 120);
7477         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7478                 redundant_path_present_map) != 1736);
7479         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7480                 active_path_number) != 1738);
7481         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7482                 alternate_paths_phys_connector) != 1739);
7483         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7484                 alternate_paths_phys_box_on_port) != 1755);
7485         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7486                 current_queue_depth_limit) != 1796);
7487         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
7488
7489         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
7490         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
7491         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
7492                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7493         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
7494                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7495         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
7496         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
7497                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7498         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
7499         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
7500                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7501
7502         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
7503         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
7504                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
7505 }