drivers/scsi/megaraid/megaraid_mbox.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  *                      Linux MegaRAID device driver
   5  *
   6  * Copyright (c) 2003-2004  LSI Logic Corporation.
   7  *
   8  * FILE         : megaraid_mbox.c
   9  * Version      : v2.20.5.1 (Nov 16 2006)
  10  *
  11  * Authors:
  12  *      Atul Mukker             <Atul.Mukker@lsi.com>
  13  *      Sreenivas Bagalkote     <Sreenivas.Bagalkote@lsi.com>
  14  *      Manoj Jose              <Manoj.Jose@lsi.com>
  15  *      Seokmann Ju
  16  *
  17  * List of supported controllers
  18  *
  19  * OEM  Product Name                    VID     DID     SSVID   SSID
  20  * ---  ------------                    ---     ---     ----    ----
  21  * Dell PERC3/QC                        101E    1960    1028    0471
  22  * Dell PERC3/DC                        101E    1960    1028    0493
  23  * Dell PERC3/SC                        101E    1960    1028    0475
  24  * Dell PERC3/Di                        1028    1960    1028    0123
  25  * Dell PERC4/SC                        1000    1960    1028    0520
  26  * Dell PERC4/DC                        1000    1960    1028    0518
  27  * Dell PERC4/QC                        1000    0407    1028    0531
  28  * Dell PERC4/Di                        1028    000F    1028    014A
  29  * Dell PERC 4e/Si                      1028    0013    1028    016c
  30  * Dell PERC 4e/Di                      1028    0013    1028    016d
  31  * Dell PERC 4e/Di                      1028    0013    1028    016e
  32  * Dell PERC 4e/Di                      1028    0013    1028    016f
  33  * Dell PERC 4e/Di                      1028    0013    1028    0170
  34  * Dell PERC 4e/DC                      1000    0408    1028    0002
  35  * Dell PERC 4e/SC                      1000    0408    1028    0001
  36  *
  37  * LSI MegaRAID SCSI 320-0              1000    1960    1000    A520
  38  * LSI MegaRAID SCSI 320-1              1000    1960    1000    0520
  39  * LSI MegaRAID SCSI 320-2              1000    1960    1000    0518
  40  * LSI MegaRAID SCSI 320-0X             1000    0407    1000    0530
  41  * LSI MegaRAID SCSI 320-2X             1000    0407    1000    0532
  42  * LSI MegaRAID SCSI 320-4X             1000    0407    1000    0531
  43  * LSI MegaRAID SCSI 320-1E             1000    0408    1000    0001
  44  * LSI MegaRAID SCSI 320-2E             1000    0408    1000    0002
  45  * LSI MegaRAID SATA 150-4              1000    1960    1000    4523
  46  * LSI MegaRAID SATA 150-6              1000    1960    1000    0523
  47  * LSI MegaRAID SATA 300-4X             1000    0409    1000    3004
  48  * LSI MegaRAID SATA 300-8X             1000    0409    1000    3008
  49  *
  50  * INTEL RAID Controller SRCU42X        1000    0407    8086    0532
  51  * INTEL RAID Controller SRCS16         1000    1960    8086    0523
  52  * INTEL RAID Controller SRCU42E        1000    0408    8086    0002
  53  * INTEL RAID Controller SRCZCRX        1000    0407    8086    0530
  54  * INTEL RAID Controller SRCS28X        1000    0409    8086    3008
  55  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3431
  56  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3499
  57  * INTEL RAID Controller SRCU51L        1000    1960    8086    0520
  58  *
  59  * FSC  MegaRAID PCI Express ROMB       1000    0408    1734    1065
  60  *
  61  * ACER MegaRAID ROMB-2E                1000    0408    1025    004D
  62  *
  63  * NEC  MegaRAID PCI Express ROMB       1000    0408    1033    8287
  64  *
  65  * For history of changes, see Documentation/scsi/ChangeLog.megaraid
  66  */
  67
  68 #include <linux/slab.h>
  69 #include <linux/module.h>
  70 #include "megaraid_mbox.h"
  71
  72 static int megaraid_init(void);
  73 static void megaraid_exit(void);
  74
  75 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
  76 static void megaraid_detach_one(struct pci_dev *);
  77 static void megaraid_mbox_shutdown(struct pci_dev *);
  78
  79 static int megaraid_io_attach(adapter_t *);
  80 static void megaraid_io_detach(adapter_t *);
  81
  82 static int megaraid_init_mbox(adapter_t *);
  83 static void megaraid_fini_mbox(adapter_t *);
  84
  85 static int megaraid_alloc_cmd_packets(adapter_t *);
  86 static void megaraid_free_cmd_packets(adapter_t *);
  87
  88 static int megaraid_mbox_setup_dma_pools(adapter_t *);
  89 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
  90
  91 static int megaraid_sysfs_alloc_resources(adapter_t *);
  92 static void megaraid_sysfs_free_resources(adapter_t *);
  93
  94 static int megaraid_abort_handler(struct scsi_cmnd *);
  95 static int megaraid_reset_handler(struct scsi_cmnd *);
  96
  97 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
  98 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
  99 static int megaraid_busywait_mbox(mraid_device_t *);
 100 static int megaraid_mbox_product_info(adapter_t *);
 101 static int megaraid_mbox_extended_cdb(adapter_t *);
 102 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
 103 static int megaraid_mbox_support_random_del(adapter_t *);
 104 static int megaraid_mbox_get_max_sg(adapter_t *);
 105 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
 106 static void megaraid_mbox_flush_cache(adapter_t *);
 107 static int megaraid_mbox_fire_sync_cmd(adapter_t *);
 108
 109 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
 110 static void megaraid_mbox_setup_device_map(adapter_t *);
 111
 112 static int megaraid_queue_command(struct Scsi_Host *, struct scsi_cmnd *);
 113 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
 114 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
 115 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
 116                 struct scsi_cmnd *);
 117 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
 118                 struct scsi_cmnd *);
 119
 120 static irqreturn_t megaraid_isr(int, void *);
 121
 122 static void megaraid_mbox_dpc(unsigned long);
 123
 124 static ssize_t megaraid_mbox_app_hndl_show(struct device *, struct device_attribute *attr, char *);
 125 static ssize_t megaraid_mbox_ld_show(struct device *, struct device_attribute *attr, char *);
 126
 127 static int megaraid_cmm_register(adapter_t *);
 128 static int megaraid_cmm_unregister(adapter_t *);
 129 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
 130 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
 131 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
 132 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
 133 static int wait_till_fw_empty(adapter_t *);
 134
 135
 136
 137 MODULE_AUTHOR("megaraidlinux@lsi.com");
 138 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
 139 MODULE_LICENSE("GPL");
 140 MODULE_VERSION(MEGARAID_VERSION);
 141
 142 /*
 143  * ### modules parameters for driver ###
 144  */
 145
 146 /*
 147  * Set to enable driver to expose unconfigured disk to kernel
 148  */
 149 static int megaraid_expose_unconf_disks = 0;
 150 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
 151 MODULE_PARM_DESC(unconf_disks,
 152         "Set to expose unconfigured disks to kernel (default=0)");
 153
 154 /*
 155  * driver wait time if the adapter's mailbox is busy
 156  */
 157 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
 158 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
 159 MODULE_PARM_DESC(busy_wait,
 160         "Max wait for mailbox in microseconds if busy (default=10)");
 161
 162 /*
 163  * number of sectors per IO command
 164  */
 165 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
 166 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
 167 MODULE_PARM_DESC(max_sectors,
 168         "Maximum number of sectors per IO command (default=128)");
 169
 170 /*
 171  * number of commands per logical unit
 172  */
 173 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
 174 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
 175 MODULE_PARM_DESC(cmd_per_lun,
 176         "Maximum number of commands per logical unit (default=64)");
 177
 178
 179 /*
 180  * Fast driver load option, skip scanning for physical devices during load.
 181  * This would result in non-disk devices being skipped during driver load
 182  * time. These can be later added though, using /proc/scsi/scsi
 183  */
 184 static unsigned int megaraid_fast_load;
 185 module_param_named(fast_load, megaraid_fast_load, int, 0);
 186 MODULE_PARM_DESC(fast_load,
 187         "Faster loading of the driver, skips physical devices! (default=0)");
 188
 189
 190 /*
 191  * mraid_debug level - threshold for amount of information to be displayed by
 192  * the driver. This level can be changed through modules parameters, ioctl or
 193  * sysfs/proc interface. By default, print the announcement messages only.
 194  */
 195 int mraid_debug_level = CL_ANN;
 196 module_param_named(debug_level, mraid_debug_level, int, 0);
 197 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
 198
 199 /*
 200  * PCI table for all supported controllers.
 201  */
 202 static struct pci_device_id pci_id_table_g[] =  {
 203         {
 204                 PCI_VENDOR_ID_DELL,
 205                 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
 206                 PCI_VENDOR_ID_DELL,
 207                 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
 208         },
 209         {
 210                 PCI_VENDOR_ID_LSI_LOGIC,
 211                 PCI_DEVICE_ID_PERC4_SC,
 212                 PCI_VENDOR_ID_DELL,
 213                 PCI_SUBSYS_ID_PERC4_SC,
 214         },
 215         {
 216                 PCI_VENDOR_ID_LSI_LOGIC,
 217                 PCI_DEVICE_ID_PERC4_DC,
 218                 PCI_VENDOR_ID_DELL,
 219                 PCI_SUBSYS_ID_PERC4_DC,
 220         },
 221         {
 222                 PCI_VENDOR_ID_LSI_LOGIC,
 223                 PCI_DEVICE_ID_VERDE,
 224                 PCI_ANY_ID,
 225                 PCI_ANY_ID,
 226         },
 227         {
 228                 PCI_VENDOR_ID_DELL,
 229                 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
 230                 PCI_VENDOR_ID_DELL,
 231                 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
 232         },
 233         {
 234                 PCI_VENDOR_ID_DELL,
 235                 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
 236                 PCI_VENDOR_ID_DELL,
 237                 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
 238         },
 239         {
 240                 PCI_VENDOR_ID_DELL,
 241                 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
 242                 PCI_VENDOR_ID_DELL,
 243                 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
 244         },
 245         {
 246                 PCI_VENDOR_ID_DELL,
 247                 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
 248                 PCI_VENDOR_ID_DELL,
 249                 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
 250         },
 251         {
 252                 PCI_VENDOR_ID_DELL,
 253                 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
 254                 PCI_VENDOR_ID_DELL,
 255                 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
 256         },
 257         {
 258                 PCI_VENDOR_ID_DELL,
 259                 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
 260                 PCI_VENDOR_ID_DELL,
 261                 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
 262         },
 263         {
 264                 PCI_VENDOR_ID_LSI_LOGIC,
 265                 PCI_DEVICE_ID_DOBSON,
 266                 PCI_ANY_ID,
 267                 PCI_ANY_ID,
 268         },
 269         {
 270                 PCI_VENDOR_ID_AMI,
 271                 PCI_DEVICE_ID_AMI_MEGARAID3,
 272                 PCI_ANY_ID,
 273                 PCI_ANY_ID,
 274         },
 275         {
 276                 PCI_VENDOR_ID_LSI_LOGIC,
 277                 PCI_DEVICE_ID_AMI_MEGARAID3,
 278                 PCI_ANY_ID,
 279                 PCI_ANY_ID,
 280         },
 281         {
 282                 PCI_VENDOR_ID_LSI_LOGIC,
 283                 PCI_DEVICE_ID_LINDSAY,
 284                 PCI_ANY_ID,
 285                 PCI_ANY_ID,
 286         },
 287         {0}     /* Terminating entry */
 288 };
 289 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
 290
 291
 292 static struct pci_driver megaraid_pci_driver = {
 293         .name           = "megaraid",
 294         .id_table       = pci_id_table_g,
 295         .probe          = megaraid_probe_one,
 296         .remove         = megaraid_detach_one,
 297         .shutdown       = megaraid_mbox_shutdown,
 298 };
 299
 300
 301
 302 // definitions for the device attributes for exporting logical drive number
 303 // for a scsi address (Host, Channel, Id, Lun)
 304
 305 static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_app_hndl);
 306
 307 // Host template initializer for megaraid mbox sysfs device attributes
 308 static struct attribute *megaraid_shost_attrs[] = {
 309         &dev_attr_megaraid_mbox_app_hndl.attr,
 310         NULL,
 311 };
 312
 313 ATTRIBUTE_GROUPS(megaraid_shost);
 314
 315 static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_ld);
 316
 317 // Host template initializer for megaraid mbox sysfs device attributes
 318 static struct attribute *megaraid_sdev_attrs[] = {
 319         &dev_attr_megaraid_mbox_ld.attr,
 320         NULL,
 321 };
 322
 323 ATTRIBUTE_GROUPS(megaraid_sdev);
 324
 325 /*
 326  * Scsi host template for megaraid unified driver
 327  */
 328 static const struct scsi_host_template megaraid_template_g = {
 329         .module                         = THIS_MODULE,
 330         .name                           = "LSI Logic MegaRAID driver",
 331         .proc_name                      = "megaraid",
 332         .queuecommand                   = megaraid_queue_command,
 333         .eh_abort_handler               = megaraid_abort_handler,
 334         .eh_host_reset_handler          = megaraid_reset_handler,
 335         .change_queue_depth             = scsi_change_queue_depth,
 336         .no_write_same                  = 1,
 337         .sdev_groups                    = megaraid_sdev_groups,
 338         .shost_groups                   = megaraid_shost_groups,
 339 };
 340
 341
 342 /**
 343  * megaraid_init - module load hook
 344  *
 345  * We register ourselves as hotplug enabled module and let PCI subsystem
 346  * discover our adapters.
 347  */
 348 static int __init
 349 megaraid_init(void)
 350 {
 351         int     rval;
 352
 353         // Announce the driver version
 354         con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
 355                 MEGARAID_EXT_VERSION));
 356
 357         // check validity of module parameters
 358         if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
 359
 360                 con_log(CL_ANN, (KERN_WARNING
 361                         "megaraid mailbox: max commands per lun reset to %d\n",
 362                         MBOX_MAX_SCSI_CMDS));
 363
 364                 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
 365         }
 366
 367
 368         // register as a PCI hot-plug driver module
 369         rval = pci_register_driver(&megaraid_pci_driver);
 370         if (rval < 0) {
 371                 con_log(CL_ANN, (KERN_WARNING
 372                         "megaraid: could not register hotplug support.\n"));
 373         }
 374
 375         return rval;
 376 }
 377
 378
 379 /**
 380  * megaraid_exit - driver unload entry point
 381  *
 382  * We simply unwrap the megaraid_init routine here.
 383  */
 384 static void __exit
 385 megaraid_exit(void)
 386 {
 387         con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
 388
 389         // unregister as PCI hotplug driver
 390         pci_unregister_driver(&megaraid_pci_driver);
 391
 392         return;
 393 }
 394
 395
 396 /**
 397  * megaraid_probe_one - PCI hotplug entry point
 398  * @pdev        : handle to this controller's PCI configuration space
 399  * @id          : pci device id of the class of controllers
 400  *
 401  * This routine should be called whenever a new adapter is detected by the
 402  * PCI hotplug susbsystem.
 403  */
 404 static int
 405 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 406 {
 407         adapter_t       *adapter;
 408
 409
 410         // detected a new controller
 411         con_log(CL_ANN, (KERN_INFO
 412                 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
 413                 pdev->vendor, pdev->device, pdev->subsystem_vendor,
 414                 pdev->subsystem_device));
 415
 416         con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
 417                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
 418
 419         if (pci_enable_device(pdev)) {
 420                 con_log(CL_ANN, (KERN_WARNING
 421                                 "megaraid: pci_enable_device failed\n"));
 422
 423                 return -ENODEV;
 424         }
 425
 426         // Enable bus-mastering on this controller
 427         pci_set_master(pdev);
 428
 429         // Allocate the per driver initialization structure
 430         adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
 431
 432         if (adapter == NULL) {
 433                 con_log(CL_ANN, (KERN_WARNING
 434                 "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
 435
 436                 goto out_probe_one;
 437         }
 438
 439
 440         // set up PCI related soft state and other pre-known parameters
 441         adapter->unique_id      = pci_dev_id(pdev);
 442         adapter->irq            = pdev->irq;
 443         adapter->pdev           = pdev;
 444
 445         atomic_set(&adapter->being_detached, 0);
 446
 447         // Setup the default DMA mask. This would be changed later on
 448         // depending on hardware capabilities
 449         if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(32))) {
 450                 con_log(CL_ANN, (KERN_WARNING
 451                         "megaraid: dma_set_mask failed:%d\n", __LINE__));
 452
 453                 goto out_free_adapter;
 454         }
 455
 456
 457         // Initialize the synchronization lock for kernel and LLD
 458         spin_lock_init(&adapter->lock);
 459
 460         // Initialize the command queues: the list of free SCBs and the list
 461         // of pending SCBs.
 462         INIT_LIST_HEAD(&adapter->kscb_pool);
 463         spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
 464
 465         INIT_LIST_HEAD(&adapter->pend_list);
 466         spin_lock_init(PENDING_LIST_LOCK(adapter));
 467
 468         INIT_LIST_HEAD(&adapter->completed_list);
 469         spin_lock_init(COMPLETED_LIST_LOCK(adapter));
 470
 471
 472         // Start the mailbox based controller
 473         if (megaraid_init_mbox(adapter) != 0) {
 474                 con_log(CL_ANN, (KERN_WARNING
 475                         "megaraid: mailbox adapter did not initialize\n"));
 476
 477                 goto out_free_adapter;
 478         }
 479
 480         // Register with LSI Common Management Module
 481         if (megaraid_cmm_register(adapter) != 0) {
 482
 483                 con_log(CL_ANN, (KERN_WARNING
 484                 "megaraid: could not register with management module\n"));
 485
 486                 goto out_fini_mbox;
 487         }
 488
 489         // setup adapter handle in PCI soft state
 490         pci_set_drvdata(pdev, adapter);
 491
 492         // attach with scsi mid-layer
 493         if (megaraid_io_attach(adapter) != 0) {
 494
 495                 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
 496
 497                 goto out_cmm_unreg;
 498         }
 499
 500         return 0;
 501
 502 out_cmm_unreg:
 503         megaraid_cmm_unregister(adapter);
 504 out_fini_mbox:
 505         megaraid_fini_mbox(adapter);
 506 out_free_adapter:
 507         kfree(adapter);
 508 out_probe_one:
 509         pci_disable_device(pdev);
 510
 511         return -ENODEV;
 512 }
 513
 514
 515 /**
 516  * megaraid_detach_one - release framework resources and call LLD release routine
 517  * @pdev        : handle for our PCI configuration space
 518  *
 519  * This routine is called during driver unload. We free all the allocated
 520  * resources and call the corresponding LLD so that it can also release all
 521  * its resources.
 522  *
 523  * This routine is also called from the PCI hotplug system.
 524  */
 525 static void
 526 megaraid_detach_one(struct pci_dev *pdev)
 527 {
 528         adapter_t               *adapter;
 529         struct Scsi_Host        *host;
 530
 531
 532         // Start a rollback on this adapter
 533         adapter = pci_get_drvdata(pdev);
 534
 535         if (!adapter) {
 536                 con_log(CL_ANN, (KERN_CRIT
 537                 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 538                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 539                         pdev->subsystem_device));
 540
 541                 return;
 542         }
 543         else {
 544                 con_log(CL_ANN, (KERN_NOTICE
 545                 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 546                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 547                         pdev->subsystem_device));
 548         }
 549
 550
 551         host = adapter->host;
 552
 553         // do not allow any more requests from the management module for this
 554         // adapter.
 555         // FIXME: How do we account for the request which might still be
 556         // pending with us?
 557         atomic_set(&adapter->being_detached, 1);
 558
 559         // detach from the IO sub-system
 560         megaraid_io_detach(adapter);
 561
 562         // Unregister from common management module
 563         //
 564         // FIXME: this must return success or failure for conditions if there
 565         // is a command pending with LLD or not.
 566         megaraid_cmm_unregister(adapter);
 567
 568         // finalize the mailbox based controller and release all resources
 569         megaraid_fini_mbox(adapter);
 570
 571         kfree(adapter);
 572
 573         scsi_host_put(host);
 574
 575         pci_disable_device(pdev);
 576
 577         return;
 578 }
 579
 580
 581 /**
 582  * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
 583  * @pdev                : generic driver model device
 584  *
 585  * Shutdown notification, perform flush cache.
 586  */
 587 static void
 588 megaraid_mbox_shutdown(struct pci_dev *pdev)
 589 {
 590         adapter_t               *adapter = pci_get_drvdata(pdev);
 591         static int              counter;
 592
 593         if (!adapter) {
 594                 con_log(CL_ANN, (KERN_WARNING
 595                         "megaraid: null device in shutdown\n"));
 596                 return;
 597         }
 598
 599         // flush caches now
 600         con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
 601                 counter++));
 602
 603         megaraid_mbox_flush_cache(adapter);
 604
 605         con_log(CL_ANN, ("done\n"));
 606 }
 607
 608
 609 /**
 610  * megaraid_io_attach - attach a device with the IO subsystem
 611  * @adapter             : controller's soft state
 612  *
 613  * Attach this device with the IO subsystem.
 614  */
 615 static int
 616 megaraid_io_attach(adapter_t *adapter)
 617 {
 618         struct Scsi_Host        *host;
 619
 620         // Initialize SCSI Host structure
 621         host = scsi_host_alloc(&megaraid_template_g, 8);
 622         if (!host) {
 623                 con_log(CL_ANN, (KERN_WARNING
 624                         "megaraid mbox: scsi_register failed\n"));
 625
 626                 return -1;
 627         }
 628
 629         SCSIHOST2ADAP(host)     = (caddr_t)adapter;
 630         adapter->host           = host;
 631
 632         host->irq               = adapter->irq;
 633         host->unique_id         = adapter->unique_id;
 634         host->can_queue         = adapter->max_cmds;
 635         host->this_id           = adapter->init_id;
 636         host->sg_tablesize      = adapter->sglen;
 637         host->max_sectors       = adapter->max_sectors;
 638         host->cmd_per_lun       = adapter->cmd_per_lun;
 639         host->max_channel       = adapter->max_channel;
 640         host->max_id            = adapter->max_target;
 641         host->max_lun           = adapter->max_lun;
 642
 643
 644         // notify mid-layer about the new controller
 645         if (scsi_add_host(host, &adapter->pdev->dev)) {
 646
 647                 con_log(CL_ANN, (KERN_WARNING
 648                         "megaraid mbox: scsi_add_host failed\n"));
 649
 650                 scsi_host_put(host);
 651
 652                 return -1;
 653         }
 654
 655         scsi_scan_host(host);
 656
 657         return 0;
 658 }
 659
 660
 661 /**
 662  * megaraid_io_detach - detach a device from the IO subsystem
 663  * @adapter             : controller's soft state
 664  *
 665  * Detach this device from the IO subsystem.
 666  */
 667 static void
 668 megaraid_io_detach(adapter_t *adapter)
 669 {
 670         struct Scsi_Host        *host;
 671
 672         con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
 673
 674         host = adapter->host;
 675
 676         scsi_remove_host(host);
 677
 678         return;
 679 }
 680
 681
 682 /*
 683  * START: Mailbox Low Level Driver
 684  *
 685  * This is section specific to the single mailbox based controllers
 686  */
 687
 688 /**
 689  * megaraid_init_mbox - initialize controller
 690  * @adapter             : our soft state
 691  *
 692  * - Allocate 16-byte aligned mailbox memory for firmware handshake
 693  * - Allocate controller's memory resources
 694  * - Find out all initialization data
 695  * - Allocate memory required for all the commands
 696  * - Use internal library of FW routines, build up complete soft state
 697  */
 698 static int
 699 megaraid_init_mbox(adapter_t *adapter)
 700 {
 701         struct pci_dev          *pdev;
 702         mraid_device_t          *raid_dev;
 703         int                     i;
 704         uint32_t                magic64;
 705
 706
 707         adapter->ito    = MBOX_TIMEOUT;
 708         pdev            = adapter->pdev;
 709
 710         /*
 711          * Allocate and initialize the init data structure for mailbox
 712          * controllers
 713          */
 714         raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
 715         if (raid_dev == NULL) return -1;
 716
 717
 718         /*
 719          * Attach the adapter soft state to raid device soft state
 720          */
 721         adapter->raid_device    = (caddr_t)raid_dev;
 722         raid_dev->fast_load     = megaraid_fast_load;
 723
 724
 725         // our baseport
 726         raid_dev->baseport = pci_resource_start(pdev, 0);
 727
 728         if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
 729
 730                 con_log(CL_ANN, (KERN_WARNING
 731                                 "megaraid: mem region busy\n"));
 732
 733                 goto out_free_raid_dev;
 734         }
 735
 736         raid_dev->baseaddr = ioremap(raid_dev->baseport, 128);
 737
 738         if (!raid_dev->baseaddr) {
 739
 740                 con_log(CL_ANN, (KERN_WARNING
 741                         "megaraid: could not map hba memory\n") );
 742
 743                 goto out_release_regions;
 744         }
 745
 746         /* initialize the mutual exclusion lock for the mailbox */
 747         spin_lock_init(&raid_dev->mailbox_lock);
 748
 749         /* allocate memory required for commands */
 750         if (megaraid_alloc_cmd_packets(adapter) != 0)
 751                 goto out_iounmap;
 752
 753         /*
 754          * Issue SYNC cmd to flush the pending cmds in the adapter
 755          * and initialize its internal state
 756          */
 757
 758         if (megaraid_mbox_fire_sync_cmd(adapter))
 759                 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
 760
 761         /*
 762          * Setup the rest of the soft state using the library of
 763          * FW routines
 764          */
 765
 766         /* request IRQ and register the interrupt service routine */
 767         if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
 768                 adapter)) {
 769
 770                 con_log(CL_ANN, (KERN_WARNING
 771                         "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
 772                 goto out_alloc_cmds;
 773
 774         }
 775
 776         // Product info
 777         if (megaraid_mbox_product_info(adapter) != 0)
 778                 goto out_free_irq;
 779
 780         // Do we support extended CDBs
 781         adapter->max_cdb_sz = 10;
 782         if (megaraid_mbox_extended_cdb(adapter) == 0) {
 783                 adapter->max_cdb_sz = 16;
 784         }
 785
 786         /*
 787          * Do we support cluster environment, if we do, what is the initiator
 788          * id.
 789          * NOTE: In a non-cluster aware firmware environment, the LLD should
 790          * return 7 as initiator id.
 791          */
 792         adapter->ha             = 0;
 793         adapter->init_id        = -1;
 794         if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
 795                 adapter->ha = 1;
 796         }
 797
 798         /*
 799          * Prepare the device ids array to have the mapping between the kernel
 800          * device address and megaraid device address.
 801          * We export the physical devices on their actual addresses. The
 802          * logical drives are exported on a virtual SCSI channel
 803          */
 804         megaraid_mbox_setup_device_map(adapter);
 805
 806         // If the firmware supports random deletion, update the device id map
 807         if (megaraid_mbox_support_random_del(adapter)) {
 808
 809                 // Change the logical drives numbers in device_ids array one
 810                 // slot in device_ids is reserved for target id, that's why
 811                 // "<=" below
 812                 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
 813                         adapter->device_ids[adapter->max_channel][i] += 0x80;
 814                 }
 815                 adapter->device_ids[adapter->max_channel][adapter->init_id] =
 816                         0xFF;
 817
 818                 raid_dev->random_del_supported = 1;
 819         }
 820
 821         /*
 822          * find out the maximum number of scatter-gather elements supported by
 823          * this firmware
 824          */
 825         adapter->sglen = megaraid_mbox_get_max_sg(adapter);
 826
 827         // enumerate RAID and SCSI channels so that all devices on SCSI
 828         // channels can later be exported, including disk devices
 829         megaraid_mbox_enum_raid_scsi(adapter);
 830
 831         /*
 832          * Other parameters required by upper layer
 833          *
 834          * maximum number of sectors per IO command
 835          */
 836         adapter->max_sectors = megaraid_max_sectors;
 837
 838         /*
 839          * number of queued commands per LUN.
 840          */
 841         adapter->cmd_per_lun = megaraid_cmd_per_lun;
 842
 843         /*
 844          * Allocate resources required to issue FW calls, when sysfs is
 845          * accessed
 846          */
 847         if (megaraid_sysfs_alloc_resources(adapter) != 0)
 848                 goto out_free_irq;
 849
 850         // Set the DMA mask to 64-bit. All supported controllers as capable of
 851         // DMA in this range
 852         pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
 853
 854         if (((magic64 == HBA_SIGNATURE_64_BIT) &&
 855                 ((adapter->pdev->subsystem_device !=
 856                 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
 857                 (adapter->pdev->subsystem_device !=
 858                 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
 859                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 860                 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
 861                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 862                 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
 863                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 864                 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
 865                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 866                 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
 867                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 868                 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
 869                 if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(64))) {
 870                         con_log(CL_ANN, (KERN_WARNING
 871                                 "megaraid: DMA mask for 64-bit failed\n"));
 872
 873                         if (dma_set_mask(&adapter->pdev->dev,
 874                                                 DMA_BIT_MASK(32))) {
 875                                 con_log(CL_ANN, (KERN_WARNING
 876                                         "megaraid: 32-bit DMA mask failed\n"));
 877                                 goto out_free_sysfs_res;
 878                         }
 879                 }
 880         }
 881
 882         // setup tasklet for DPC
 883         tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
 884                         (unsigned long)adapter);
 885
 886         con_log(CL_DLEVEL1, (KERN_INFO
 887                 "megaraid mbox hba successfully initialized\n"));
 888
 889         return 0;
 890
 891 out_free_sysfs_res:
 892         megaraid_sysfs_free_resources(adapter);
 893 out_free_irq:
 894         free_irq(adapter->irq, adapter);
 895 out_alloc_cmds:
 896         megaraid_free_cmd_packets(adapter);
 897 out_iounmap:
 898         iounmap(raid_dev->baseaddr);
 899 out_release_regions:
 900         pci_release_regions(pdev);
 901 out_free_raid_dev:
 902         kfree(raid_dev);
 903
 904         return -1;
 905 }
 906
 907
 908 /**
 909  * megaraid_fini_mbox - undo controller initialization
 910  * @adapter             : our soft state
 911  */
 912 static void
 913 megaraid_fini_mbox(adapter_t *adapter)
 914 {
 915         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
 916
 917         // flush all caches
 918         megaraid_mbox_flush_cache(adapter);
 919
 920         tasklet_kill(&adapter->dpc_h);
 921
 922         megaraid_sysfs_free_resources(adapter);
 923
 924         megaraid_free_cmd_packets(adapter);
 925
 926         free_irq(adapter->irq, adapter);
 927
 928         iounmap(raid_dev->baseaddr);
 929
 930         pci_release_regions(adapter->pdev);
 931
 932         kfree(raid_dev);
 933
 934         return;
 935 }
 936
 937
 938 /**
 939  * megaraid_alloc_cmd_packets - allocate shared mailbox
 940  * @adapter             : soft state of the raid controller
 941  *
 942  * Allocate and align the shared mailbox. This mailbox is used to issue
 943  * all the commands. For IO based controllers, the mailbox is also registered
 944  * with the FW. Allocate memory for all commands as well.
 945  * This is our big allocator.
 946  */
 947 static int
 948 megaraid_alloc_cmd_packets(adapter_t *adapter)
 949 {
 950         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
 951         struct pci_dev          *pdev;
 952         unsigned long           align;
 953         scb_t                   *scb;
 954         mbox_ccb_t              *ccb;
 955         struct mraid_pci_blk    *epthru_pci_blk;
 956         struct mraid_pci_blk    *sg_pci_blk;
 957         struct mraid_pci_blk    *mbox_pci_blk;
 958         int                     i;
 959
 960         pdev = adapter->pdev;
 961
 962         /*
 963          * Setup the mailbox
 964          * Allocate the common 16-byte aligned memory for the handshake
 965          * mailbox.
 966          */
 967         raid_dev->una_mbox64 = dma_alloc_coherent(&adapter->pdev->dev,
 968                                                   sizeof(mbox64_t),
 969                                                   &raid_dev->una_mbox64_dma,
 970                                                   GFP_KERNEL);
 971
 972         if (!raid_dev->una_mbox64) {
 973                 con_log(CL_ANN, (KERN_WARNING
 974                         "megaraid: out of memory, %s %d\n", __func__,
 975                         __LINE__));
 976                 return -1;
 977         }
 978
 979         /*
 980          * Align the mailbox at 16-byte boundary
 981          */
 982         raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
 983
 984         raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
 985                                 (~0UL ^ 0xFUL));
 986
 987         raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
 988
 989         align = ((void *)raid_dev->mbox -
 990                         ((void *)&raid_dev->una_mbox64->mbox32));
 991
 992         raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
 993                         align;
 994
 995         // Allocate memory for commands issued internally
 996         adapter->ibuf = dma_alloc_coherent(&pdev->dev, MBOX_IBUF_SIZE,
 997                                            &adapter->ibuf_dma_h, GFP_KERNEL);
 998         if (!adapter->ibuf) {
 999
1000                 con_log(CL_ANN, (KERN_WARNING
1001                         "megaraid: out of memory, %s %d\n", __func__,
1002                         __LINE__));
1003
1004                 goto out_free_common_mbox;
1005         }
1006
1007         // Allocate memory for our SCSI Command Blocks and their associated
1008         // memory
1009
1010         /*
1011          * Allocate memory for the base list of scb. Later allocate memory for
1012          * CCBs and embedded components of each CCB and point the pointers in
1013          * scb to the allocated components
1014          * NOTE: The code to allocate SCB will be duplicated in all the LLD
1015          * since the calling routine does not yet know the number of available
1016          * commands.
1017          */
1018         adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1019
1020         if (adapter->kscb_list == NULL) {
1021                 con_log(CL_ANN, (KERN_WARNING
1022                         "megaraid: out of memory, %s %d\n", __func__,
1023                         __LINE__));
1024                 goto out_free_ibuf;
1025         }
1026
1027         // memory allocation for our command packets
1028         if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1029                 con_log(CL_ANN, (KERN_WARNING
1030                         "megaraid: out of memory, %s %d\n", __func__,
1031                         __LINE__));
1032                 goto out_free_scb_list;
1033         }
1034
1035         // Adjust the scb pointers and link in the free pool
1036         epthru_pci_blk  = raid_dev->epthru_pool;
1037         sg_pci_blk      = raid_dev->sg_pool;
1038         mbox_pci_blk    = raid_dev->mbox_pool;
1039
1040         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1041                 scb                     = adapter->kscb_list + i;
1042                 ccb                     = raid_dev->ccb_list + i;
1043
1044                 ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1045                 ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1046                 ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1047                 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1048
1049                 // make sure the mailbox is aligned properly
1050                 if (ccb->mbox_dma_h & 0x0F) {
1051                         con_log(CL_ANN, (KERN_CRIT
1052                                 "megaraid mbox: not aligned on 16-bytes\n"));
1053
1054                         goto out_teardown_dma_pools;
1055                 }
1056
1057                 ccb->epthru             = (mraid_epassthru_t *)
1058                                                 epthru_pci_blk[i].vaddr;
1059                 ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1060                 ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1061                 ccb->pthru_dma_h        = ccb->epthru_dma_h;
1062
1063
1064                 ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1065                 ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1066                 ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1067
1068                 scb->ccb                = (caddr_t)ccb;
1069                 scb->gp                 = 0;
1070
1071                 scb->sno                = i;    // command index
1072
1073                 scb->scp                = NULL;
1074                 scb->state              = SCB_FREE;
1075                 scb->dma_direction      = DMA_NONE;
1076                 scb->dma_type           = MRAID_DMA_NONE;
1077                 scb->dev_channel        = -1;
1078                 scb->dev_target         = -1;
1079
1080                 // put scb in the free pool
1081                 list_add_tail(&scb->list, &adapter->kscb_pool);
1082         }
1083
1084         return 0;
1085
1086 out_teardown_dma_pools:
1087         megaraid_mbox_teardown_dma_pools(adapter);
1088 out_free_scb_list:
1089         kfree(adapter->kscb_list);
1090 out_free_ibuf:
1091         dma_free_coherent(&pdev->dev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1092                 adapter->ibuf_dma_h);
1093 out_free_common_mbox:
1094         dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t),
1095                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1096
1097         return -1;
1098 }
1099
1100
1101 /**
1102  * megaraid_free_cmd_packets - free memory
1103  * @adapter             : soft state of the raid controller
1104  *
1105  * Release memory resources allocated for commands.
1106  */
1107 static void
1108 megaraid_free_cmd_packets(adapter_t *adapter)
1109 {
1110         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1111
1112         megaraid_mbox_teardown_dma_pools(adapter);
1113
1114         kfree(adapter->kscb_list);
1115
1116         dma_free_coherent(&adapter->pdev->dev, MBOX_IBUF_SIZE,
1117                 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1118
1119         dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t),
1120                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1121         return;
1122 }
1123
1124
1125 /**
1126  * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1127  * @adapter             : HBA soft state
1128  *
1129  * Setup the dma pools for mailbox, passthru and extended passthru structures,
1130  * and scatter-gather lists.
1131  */
1132 static int
1133 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1134 {
1135         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1136         struct mraid_pci_blk    *epthru_pci_blk;
1137         struct mraid_pci_blk    *sg_pci_blk;
1138         struct mraid_pci_blk    *mbox_pci_blk;
1139         int                     i;
1140
1141
1142
1143         // Allocate memory for 16-bytes aligned mailboxes
1144         raid_dev->mbox_pool_handle = dma_pool_create("megaraid mbox pool",
1145                                                 &adapter->pdev->dev,
1146                                                 sizeof(mbox64_t) + 16,
1147                                                 16, 0);
1148
1149         if (raid_dev->mbox_pool_handle == NULL) {
1150                 goto fail_setup_dma_pool;
1151         }
1152
1153         mbox_pci_blk = raid_dev->mbox_pool;
1154         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1155                 mbox_pci_blk[i].vaddr = dma_pool_alloc(
1156                                                 raid_dev->mbox_pool_handle,
1157                                                 GFP_KERNEL,
1158                                                 &mbox_pci_blk[i].dma_addr);
1159                 if (!mbox_pci_blk[i].vaddr) {
1160                         goto fail_setup_dma_pool;
1161                 }
1162         }
1163
1164         /*
1165          * Allocate memory for each embedded passthru strucuture pointer
1166          * Request for a 128 bytes aligned structure for each passthru command
1167          * structure
1168          * Since passthru and extended passthru commands are exclusive, they
1169          * share common memory pool. Passthru structures piggyback on memory
1170          * allocated to extended passthru since passthru is smaller of the two
1171          */
1172         raid_dev->epthru_pool_handle = dma_pool_create("megaraid mbox pthru",
1173                         &adapter->pdev->dev, sizeof(mraid_epassthru_t), 128, 0);
1174
1175         if (raid_dev->epthru_pool_handle == NULL) {
1176                 goto fail_setup_dma_pool;
1177         }
1178
1179         epthru_pci_blk = raid_dev->epthru_pool;
1180         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1181                 epthru_pci_blk[i].vaddr = dma_pool_alloc(
1182                                                 raid_dev->epthru_pool_handle,
1183                                                 GFP_KERNEL,
1184                                                 &epthru_pci_blk[i].dma_addr);
1185                 if (!epthru_pci_blk[i].vaddr) {
1186                         goto fail_setup_dma_pool;
1187                 }
1188         }
1189
1190
1191         // Allocate memory for each scatter-gather list. Request for 512 bytes
1192         // alignment for each sg list
1193         raid_dev->sg_pool_handle = dma_pool_create("megaraid mbox sg",
1194                                         &adapter->pdev->dev,
1195                                         sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1196                                         512, 0);
1197
1198         if (raid_dev->sg_pool_handle == NULL) {
1199                 goto fail_setup_dma_pool;
1200         }
1201
1202         sg_pci_blk = raid_dev->sg_pool;
1203         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1204                 sg_pci_blk[i].vaddr = dma_pool_alloc(
1205                                                 raid_dev->sg_pool_handle,
1206                                                 GFP_KERNEL,
1207                                                 &sg_pci_blk[i].dma_addr);
1208                 if (!sg_pci_blk[i].vaddr) {
1209                         goto fail_setup_dma_pool;
1210                 }
1211         }
1212
1213         return 0;
1214
1215 fail_setup_dma_pool:
1216         megaraid_mbox_teardown_dma_pools(adapter);
1217         return -1;
1218 }
1219
1220
1221 /**
1222  * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1223  * @adapter             : HBA soft state
1224  *
1225  * Teardown the dma pool for mailbox, passthru and extended passthru
1226  * structures, and scatter-gather lists.
1227  */
1228 static void
1229 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1230 {
1231         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1232         struct mraid_pci_blk    *epthru_pci_blk;
1233         struct mraid_pci_blk    *sg_pci_blk;
1234         struct mraid_pci_blk    *mbox_pci_blk;
1235         int                     i;
1236
1237
1238         sg_pci_blk = raid_dev->sg_pool;
1239         for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1240                 dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1241                         sg_pci_blk[i].dma_addr);
1242         }
1243         dma_pool_destroy(raid_dev->sg_pool_handle);
1244
1245
1246         epthru_pci_blk = raid_dev->epthru_pool;
1247         for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1248                 dma_pool_free(raid_dev->epthru_pool_handle,
1249                         epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1250         }
1251         dma_pool_destroy(raid_dev->epthru_pool_handle);
1252
1253
1254         mbox_pci_blk = raid_dev->mbox_pool;
1255         for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1256                 dma_pool_free(raid_dev->mbox_pool_handle,
1257                         mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1258         }
1259         dma_pool_destroy(raid_dev->mbox_pool_handle);
1260
1261         return;
1262 }
1263
1264
1265 /**
1266  * megaraid_alloc_scb - detach and return a scb from the free list
1267  * @adapter     : controller's soft state
1268  * @scp         : pointer to the scsi command to be executed
1269  *
1270  * Return the scb from the head of the free list. %NULL if there are none
1271  * available.
1272  */
1273 static scb_t *
1274 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1275 {
1276         struct list_head        *head = &adapter->kscb_pool;
1277         scb_t                   *scb = NULL;
1278         unsigned long           flags;
1279
1280         // detach scb from free pool
1281         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1282
1283         if (list_empty(head)) {
1284                 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1285                 return NULL;
1286         }
1287
1288         scb = list_entry(head->next, scb_t, list);
1289         list_del_init(&scb->list);
1290
1291         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1292
1293         scb->state      = SCB_ACTIVE;
1294         scb->scp        = scp;
1295         scb->dma_type   = MRAID_DMA_NONE;
1296
1297         return scb;
1298 }
1299
1300
1301 /**
1302  * megaraid_dealloc_scb - return the scb to the free pool
1303  * @adapter     : controller's soft state
1304  * @scb         : scb to be freed
1305  *
1306  * Return the scb back to the free list of scbs. The caller must 'flush' the
1307  * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1308  * NOTE NOTE: Make sure the scb is not on any list before calling this
1309  * routine.
1310  */
1311 static inline void
1312 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1313 {
1314         unsigned long           flags;
1315
1316         // put scb in the free pool
1317         scb->state      = SCB_FREE;
1318         scb->scp        = NULL;
1319         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1320
1321         list_add(&scb->list, &adapter->kscb_pool);
1322
1323         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1324
1325         return;
1326 }
1327
1328
1329 /**
1330  * megaraid_mbox_mksgl - make the scatter-gather list
1331  * @adapter     : controller's soft state
1332  * @scb         : scsi control block
1333  *
1334  * Prepare the scatter-gather list.
1335  */
1336 static int
1337 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1338 {
1339         struct scatterlist      *sgl;
1340         mbox_ccb_t              *ccb;
1341         struct scsi_cmnd        *scp;
1342         int                     sgcnt;
1343         int                     i;
1344
1345
1346         scp     = scb->scp;
1347         ccb     = (mbox_ccb_t *)scb->ccb;
1348
1349         sgcnt = scsi_dma_map(scp);
1350         BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1351
1352         // no mapping required if no data to be transferred
1353         if (!sgcnt)
1354                 return 0;
1355
1356         scb->dma_type = MRAID_DMA_WSG;
1357
1358         scsi_for_each_sg(scp, sgl, sgcnt, i) {
1359                 ccb->sgl64[i].address   = sg_dma_address(sgl);
1360                 ccb->sgl64[i].length    = sg_dma_len(sgl);
1361         }
1362
1363         // Return count of SG nodes
1364         return sgcnt;
1365 }
1366
1367
1368 /**
1369  * mbox_post_cmd - issue a mailbox command
1370  * @adapter     : controller's soft state
1371  * @scb         : command to be issued
1372  *
1373  * Post the command to the controller if mailbox is available.
1374  */
1375 static int
1376 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1377 {
1378         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1379         mbox64_t        *mbox64;
1380         mbox_t          *mbox;
1381         mbox_ccb_t      *ccb;
1382         unsigned long   flags;
1383         unsigned int    i = 0;
1384
1385
1386         ccb     = (mbox_ccb_t *)scb->ccb;
1387         mbox    = raid_dev->mbox;
1388         mbox64  = raid_dev->mbox64;
1389
1390         /*
1391          * Check for busy mailbox. If it is, return failure - the caller
1392          * should retry later.
1393          */
1394         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1395
1396         if (unlikely(mbox->busy)) {
1397                 do {
1398                         udelay(1);
1399                         i++;
1400                         rmb();
1401                 } while(mbox->busy && (i < max_mbox_busy_wait));
1402
1403                 if (mbox->busy) {
1404
1405                         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1406
1407                         return -1;
1408                 }
1409         }
1410
1411
1412         // Copy this command's mailbox data into "adapter's" mailbox
1413         memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1414         mbox->cmdid = scb->sno;
1415
1416         adapter->outstanding_cmds++;
1417
1418         mbox->busy      = 1;    // Set busy
1419         mbox->poll      = 0;
1420         mbox->ack       = 0;
1421         wmb();
1422
1423         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1424
1425         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1426
1427         return 0;
1428 }
1429
1430
1431 /**
1432  * megaraid_queue_command_lck - generic queue entry point for all LLDs
1433  * @scp         : pointer to the scsi command to be executed
1434  *
1435  * Queue entry point for mailbox based controllers.
1436  */
1437 static int megaraid_queue_command_lck(struct scsi_cmnd *scp)
1438 {
1439         void (*done)(struct scsi_cmnd *) = scsi_done;
1440         adapter_t       *adapter;
1441         scb_t           *scb;
1442         int             if_busy;
1443
1444         adapter         = SCP2ADAPTER(scp);
1445         scp->result     = 0;
1446
1447         /*
1448          * Allocate and build a SCB request
1449          * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1450          * not allocate scb. We will return non-zero status in that case.
1451          * NOTE: scb can be null even though certain commands completed
1452          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1453          * return 0 in that case, and we would do the callback right away.
1454          */
1455         if_busy = 0;
1456         scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1457         if (!scb) {     // command already completed
1458                 done(scp);
1459                 return 0;
1460         }
1461
1462         megaraid_mbox_runpendq(adapter, scb);
1463         return if_busy;
1464 }
1465
1466 static DEF_SCSI_QCMD(megaraid_queue_command)
1467
1468 /**
1469  * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1470  * @adapter     : controller's soft state
1471  * @scp         : mid-layer scsi command pointer
1472  * @busy        : set if request could not be completed because of lack of
1473  *              resources
1474  *
1475  * Transform the mid-layer scsi command to megaraid firmware lingua.
1476  * Convert the command issued by mid-layer to format understood by megaraid
1477  * firmware. We also complete certain commands without sending them to firmware.
1478  */
1479 static scb_t *
1480 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1481 {
1482         mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1483         int                     channel;
1484         int                     target;
1485         int                     islogical;
1486         mbox_ccb_t              *ccb;
1487         mraid_passthru_t        *pthru;
1488         mbox64_t                *mbox64;
1489         mbox_t                  *mbox;
1490         scb_t                   *scb;
1491         char                    skip[] = "skipping";
1492         char                    scan[] = "scanning";
1493         char                    *ss;
1494
1495
1496         /*
1497          * Get the appropriate device map for the device this command is
1498          * intended for
1499          */
1500         MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1501
1502         /*
1503          * Logical drive commands
1504          */
1505         if (islogical) {
1506                 switch (scp->cmnd[0]) {
1507                 case TEST_UNIT_READY:
1508                         /*
1509                          * Do we support clustering and is the support enabled
1510                          * If no, return success always
1511                          */
1512                         if (!adapter->ha) {
1513                                 scp->result = (DID_OK << 16);
1514                                 return NULL;
1515                         }
1516
1517                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1518                                 scp->result = (DID_ERROR << 16);
1519                                 *busy = 1;
1520                                 return NULL;
1521                         }
1522
1523                         scb->dma_direction      = scp->sc_data_direction;
1524                         scb->dev_channel        = 0xFF;
1525                         scb->dev_target         = target;
1526                         ccb                     = (mbox_ccb_t *)scb->ccb;
1527
1528                         /*
1529                          * The command id will be provided by the command
1530                          * issuance routine
1531                          */
1532                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1533                         ccb->raw_mbox[2]        = RESERVATION_STATUS;
1534                         ccb->raw_mbox[3]        = target;
1535
1536                         return scb;
1537
1538                 case MODE_SENSE:
1539                 {
1540                         struct scatterlist      *sgl;
1541                         caddr_t                 vaddr;
1542
1543                         sgl = scsi_sglist(scp);
1544                         if (sg_page(sgl)) {
1545                                 vaddr = (caddr_t) sg_virt(&sgl[0]);
1546
1547                                 memset(vaddr, 0, scp->cmnd[4]);
1548                         }
1549                         else {
1550                                 con_log(CL_ANN, (KERN_WARNING
1551                                                  "megaraid mailbox: invalid sg:%d\n",
1552                                                  __LINE__));
1553                         }
1554                 }
1555                 scp->result = (DID_OK << 16);
1556                 return NULL;
1557
1558                 case INQUIRY:
1559                         /*
1560                          * Display the channel scan for logical drives
1561                          * Do not display scan for a channel if already done.
1562                          */
1563                         if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1564
1565                                 con_log(CL_ANN, (KERN_INFO
1566                                         "scsi[%d]: scanning scsi channel %d",
1567                                         adapter->host->host_no,
1568                                         SCP2CHANNEL(scp)));
1569
1570                                 con_log(CL_ANN, (
1571                                         " [virtual] for logical drives\n"));
1572
1573                                 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1574                         }
1575
1576                         if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1577                                 scsi_build_sense(scp, 0, ILLEGAL_REQUEST,
1578                                                  MEGA_INVALID_FIELD_IN_CDB, 0);
1579                                 return NULL;
1580                         }
1581
1582                         fallthrough;
1583
1584                 case READ_CAPACITY:
1585                         /*
1586                          * Do not allow LUN > 0 for logical drives and
1587                          * requests for more than 40 logical drives
1588                          */
1589                         if (SCP2LUN(scp)) {
1590                                 scp->result = (DID_BAD_TARGET << 16);
1591                                 return NULL;
1592                         }
1593                         if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1594                                 scp->result = (DID_BAD_TARGET << 16);
1595                                 return NULL;
1596                         }
1597
1598
1599                         /* Allocate a SCB and initialize passthru */
1600                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1601                                 scp->result = (DID_ERROR << 16);
1602                                 *busy = 1;
1603                                 return NULL;
1604                         }
1605
1606                         ccb                     = (mbox_ccb_t *)scb->ccb;
1607                         scb->dev_channel        = 0xFF;
1608                         scb->dev_target         = target;
1609                         pthru                   = ccb->pthru;
1610                         mbox                    = ccb->mbox;
1611                         mbox64                  = ccb->mbox64;
1612
1613                         pthru->timeout          = 0;
1614                         pthru->ars              = 1;
1615                         pthru->reqsenselen      = 14;
1616                         pthru->islogical        = 1;
1617                         pthru->logdrv           = target;
1618                         pthru->cdblen           = scp->cmd_len;
1619                         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1620
1621                         mbox->cmd               = MBOXCMD_PASSTHRU64;
1622                         scb->dma_direction      = scp->sc_data_direction;
1623
1624                         pthru->dataxferlen      = scsi_bufflen(scp);
1625                         pthru->dataxferaddr     = ccb->sgl_dma_h;
1626                         pthru->numsge           = megaraid_mbox_mksgl(adapter,
1627                                                         scb);
1628
1629                         mbox->xferaddr          = 0xFFFFFFFF;
1630                         mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1631                         mbox64->xferaddr_hi     = 0;
1632
1633                         return scb;
1634
1635                 case READ_6:
1636                 case WRITE_6:
1637                 case READ_10:
1638                 case WRITE_10:
1639                 case READ_12:
1640                 case WRITE_12:
1641
1642                         /*
1643                          * Allocate a SCB and initialize mailbox
1644                          */
1645                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1646                                 scp->result = (DID_ERROR << 16);
1647                                 *busy = 1;
1648                                 return NULL;
1649                         }
1650                         ccb                     = (mbox_ccb_t *)scb->ccb;
1651                         scb->dev_channel        = 0xFF;
1652                         scb->dev_target         = target;
1653                         mbox                    = ccb->mbox;
1654                         mbox64                  = ccb->mbox64;
1655                         mbox->logdrv            = target;
1656
1657                         /*
1658                          * A little HACK: 2nd bit is zero for all scsi read
1659                          * commands and is set for all scsi write commands
1660                          */
1661                         mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1662                                         MBOXCMD_LREAD64 ;
1663
1664                         /*
1665                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1666                          */
1667                         if (scp->cmd_len == 6) {
1668                                 mbox->numsectors = (uint32_t)scp->cmnd[4];
1669                                 mbox->lba =
1670                                         ((uint32_t)scp->cmnd[1] << 16)  |
1671                                         ((uint32_t)scp->cmnd[2] << 8)   |
1672                                         (uint32_t)scp->cmnd[3];
1673
1674                                 mbox->lba &= 0x1FFFFF;
1675                         }
1676
1677                         /*
1678                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1679                          */
1680                         else if (scp->cmd_len == 10) {
1681                                 mbox->numsectors =
1682                                         (uint32_t)scp->cmnd[8] |
1683                                         ((uint32_t)scp->cmnd[7] << 8);
1684                                 mbox->lba =
1685                                         ((uint32_t)scp->cmnd[2] << 24) |
1686                                         ((uint32_t)scp->cmnd[3] << 16) |
1687                                         ((uint32_t)scp->cmnd[4] << 8) |
1688                                         (uint32_t)scp->cmnd[5];
1689                         }
1690
1691                         /*
1692                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1693                          */
1694                         else if (scp->cmd_len == 12) {
1695                                 mbox->lba =
1696                                         ((uint32_t)scp->cmnd[2] << 24) |
1697                                         ((uint32_t)scp->cmnd[3] << 16) |
1698                                         ((uint32_t)scp->cmnd[4] << 8) |
1699                                         (uint32_t)scp->cmnd[5];
1700
1701                                 mbox->numsectors =
1702                                         ((uint32_t)scp->cmnd[6] << 24) |
1703                                         ((uint32_t)scp->cmnd[7] << 16) |
1704                                         ((uint32_t)scp->cmnd[8] << 8) |
1705                                         (uint32_t)scp->cmnd[9];
1706                         }
1707                         else {
1708                                 con_log(CL_ANN, (KERN_WARNING
1709                                         "megaraid: unsupported CDB length\n"));
1710
1711                                 megaraid_dealloc_scb(adapter, scb);
1712
1713                                 scp->result = (DID_ERROR << 16);
1714                                 return NULL;
1715                         }
1716
1717                         scb->dma_direction = scp->sc_data_direction;
1718
1719                         // Calculate Scatter-Gather info
1720                         mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1721                         mbox->numsge            = megaraid_mbox_mksgl(adapter,
1722                                                         scb);
1723                         mbox->xferaddr          = 0xFFFFFFFF;
1724                         mbox64->xferaddr_hi     = 0;
1725
1726                         return scb;
1727
1728                 case RESERVE:
1729                 case RELEASE:
1730                         /*
1731                          * Do we support clustering and is the support enabled
1732                          */
1733                         if (!adapter->ha) {
1734                                 scp->result = (DID_BAD_TARGET << 16);
1735                                 return NULL;
1736                         }
1737
1738                         /*
1739                          * Allocate a SCB and initialize mailbox
1740                          */
1741                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1742                                 scp->result = (DID_ERROR << 16);
1743                                 *busy = 1;
1744                                 return NULL;
1745                         }
1746
1747                         ccb                     = (mbox_ccb_t *)scb->ccb;
1748                         scb->dev_channel        = 0xFF;
1749                         scb->dev_target         = target;
1750                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1751                         ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1752                                                 RESERVE_LD : RELEASE_LD;
1753
1754                         ccb->raw_mbox[3]        = target;
1755                         scb->dma_direction      = scp->sc_data_direction;
1756
1757                         return scb;
1758
1759                 default:
1760                         scp->result = (DID_BAD_TARGET << 16);
1761                         return NULL;
1762                 }
1763         }
1764         else { // Passthru device commands
1765
1766                 // Do not allow access to target id > 15 or LUN > 7
1767                 if (target > 15 || SCP2LUN(scp) > 7) {
1768                         scp->result = (DID_BAD_TARGET << 16);
1769                         return NULL;
1770                 }
1771
1772                 // if fast load option was set and scan for last device is
1773                 // over, reset the fast_load flag so that during a possible
1774                 // next scan, devices can be made available
1775                 if (rdev->fast_load && (target == 15) &&
1776                         (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1777
1778                         con_log(CL_ANN, (KERN_INFO
1779                         "megaraid[%d]: physical device scan re-enabled\n",
1780                                 adapter->host->host_no));
1781                         rdev->fast_load = 0;
1782                 }
1783
1784                 /*
1785                  * Display the channel scan for physical devices
1786                  */
1787                 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1788
1789                         ss = rdev->fast_load ? skip : scan;
1790
1791                         con_log(CL_ANN, (KERN_INFO
1792                                 "scsi[%d]: %s scsi channel %d [Phy %d]",
1793                                 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1794                                 channel));
1795
1796                         con_log(CL_ANN, (
1797                                 " for non-raid devices\n"));
1798
1799                         rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1800                 }
1801
1802                 // disable channel sweep if fast load option given
1803                 if (rdev->fast_load) {
1804                         scp->result = (DID_BAD_TARGET << 16);
1805                         return NULL;
1806                 }
1807
1808                 // Allocate a SCB and initialize passthru
1809                 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1810                         scp->result = (DID_ERROR << 16);
1811                         *busy = 1;
1812                         return NULL;
1813                 }
1814
1815                 ccb                     = (mbox_ccb_t *)scb->ccb;
1816                 scb->dev_channel        = channel;
1817                 scb->dev_target         = target;
1818                 scb->dma_direction      = scp->sc_data_direction;
1819                 mbox                    = ccb->mbox;
1820                 mbox64                  = ccb->mbox64;
1821
1822                 // Does this firmware support extended CDBs
1823                 if (adapter->max_cdb_sz == 16) {
1824                         mbox->cmd               = MBOXCMD_EXTPTHRU;
1825
1826                         megaraid_mbox_prepare_epthru(adapter, scb, scp);
1827
1828                         mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
1829                         mbox64->xferaddr_hi     = 0;
1830                         mbox->xferaddr          = 0xFFFFFFFF;
1831                 }
1832                 else {
1833                         mbox->cmd = MBOXCMD_PASSTHRU64;
1834
1835                         megaraid_mbox_prepare_pthru(adapter, scb, scp);
1836
1837                         mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
1838                         mbox64->xferaddr_hi     = 0;
1839                         mbox->xferaddr          = 0xFFFFFFFF;
1840                 }
1841                 return scb;
1842         }
1843
1844         // NOT REACHED
1845 }
1846
1847
1848 /**
1849  * megaraid_mbox_runpendq - execute commands queued in the pending queue
1850  * @adapter     : controller's soft state
1851  * @scb_q       : SCB to be queued in the pending list
1852  *
1853  * Scan the pending list for commands which are not yet issued and try to
1854  * post to the controller. The SCB can be a null pointer, which would indicate
1855  * no SCB to be queue, just try to execute the ones in the pending list.
1856  *
1857  * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1858  * out from the head of the pending list. If it is successfully issued, the
1859  * next SCB is at the head now.
1860  */
1861 static void
1862 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1863 {
1864         scb_t                   *scb;
1865         unsigned long           flags;
1866
1867         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1868
1869         if (scb_q) {
1870                 scb_q->state = SCB_PENDQ;
1871                 list_add_tail(&scb_q->list, &adapter->pend_list);
1872         }
1873
1874         // if the adapter in not in quiescent mode, post the commands to FW
1875         if (adapter->quiescent) {
1876                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1877                 return;
1878         }
1879
1880         while (!list_empty(&adapter->pend_list)) {
1881
1882                 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1883
1884                 scb = list_entry(adapter->pend_list.next, scb_t, list);
1885
1886                 // remove the scb from the pending list and try to
1887                 // issue. If we are unable to issue it, put back in
1888                 // the pending list and return
1889
1890                 list_del_init(&scb->list);
1891
1892                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1893
1894                 // if mailbox was busy, return SCB back to pending
1895                 // list. Make sure to add at the head, since that's
1896                 // where it would have been removed from
1897
1898                 scb->state = SCB_ISSUED;
1899
1900                 if (mbox_post_cmd(adapter, scb) != 0) {
1901
1902                         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1903
1904                         scb->state = SCB_PENDQ;
1905
1906                         list_add(&scb->list, &adapter->pend_list);
1907
1908                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1909                                 flags);
1910
1911                         return;
1912                 }
1913
1914                 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1915         }
1916
1917         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1918
1919
1920         return;
1921 }
1922
1923
1924 /**
1925  * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1926  * @adapter     : pointer to controller's soft state
1927  * @scb         : scsi control block
1928  * @scp         : scsi command from the mid-layer
1929  *
1930  * Prepare a command for the scsi physical devices.
1931  */
1932 static void
1933 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1934                 struct scsi_cmnd *scp)
1935 {
1936         mbox_ccb_t              *ccb;
1937         mraid_passthru_t        *pthru;
1938         uint8_t                 channel;
1939         uint8_t                 target;
1940
1941         ccb     = (mbox_ccb_t *)scb->ccb;
1942         pthru   = ccb->pthru;
1943         channel = scb->dev_channel;
1944         target  = scb->dev_target;
1945
1946         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1947         pthru->timeout          = 4;
1948         pthru->ars              = 1;
1949         pthru->islogical        = 0;
1950         pthru->channel          = 0;
1951         pthru->target           = (channel << 4) | target;
1952         pthru->logdrv           = SCP2LUN(scp);
1953         pthru->reqsenselen      = 14;
1954         pthru->cdblen           = scp->cmd_len;
1955
1956         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1957
1958         if (scsi_bufflen(scp)) {
1959                 pthru->dataxferlen      = scsi_bufflen(scp);
1960                 pthru->dataxferaddr     = ccb->sgl_dma_h;
1961                 pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
1962         }
1963         else {
1964                 pthru->dataxferaddr     = 0;
1965                 pthru->dataxferlen      = 0;
1966                 pthru->numsge           = 0;
1967         }
1968         return;
1969 }
1970
1971
1972 /**
1973  * megaraid_mbox_prepare_epthru - prepare a command for physical devices
1974  * @adapter     : pointer to controller's soft state
1975  * @scb         : scsi control block
1976  * @scp         : scsi command from the mid-layer
1977  *
1978  * Prepare a command for the scsi physical devices. This routine prepares
1979  * commands for devices which can take extended CDBs (>10 bytes).
1980  */
1981 static void
1982 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
1983                 struct scsi_cmnd *scp)
1984 {
1985         mbox_ccb_t              *ccb;
1986         mraid_epassthru_t       *epthru;
1987         uint8_t                 channel;
1988         uint8_t                 target;
1989
1990         ccb     = (mbox_ccb_t *)scb->ccb;
1991         epthru  = ccb->epthru;
1992         channel = scb->dev_channel;
1993         target  = scb->dev_target;
1994
1995         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1996         epthru->timeout         = 4;
1997         epthru->ars             = 1;
1998         epthru->islogical       = 0;
1999         epthru->channel         = 0;
2000         epthru->target          = (channel << 4) | target;
2001         epthru->logdrv          = SCP2LUN(scp);
2002         epthru->reqsenselen     = 14;
2003         epthru->cdblen          = scp->cmd_len;
2004
2005         memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2006
2007         if (scsi_bufflen(scp)) {
2008                 epthru->dataxferlen     = scsi_bufflen(scp);
2009                 epthru->dataxferaddr    = ccb->sgl_dma_h;
2010                 epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2011         }
2012         else {
2013                 epthru->dataxferaddr    = 0;
2014                 epthru->dataxferlen     = 0;
2015                 epthru->numsge          = 0;
2016         }
2017         return;
2018 }
2019
2020
2021 /**
2022  * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2023  * @adapter     : controller's soft state
2024  *
2025  * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2026  * completed command and put them on the completed list for later processing.
2027  *
2028  * Returns:     1 if the interrupt is valid, 0 otherwise
2029  */
2030 static int
2031 megaraid_ack_sequence(adapter_t *adapter)
2032 {
2033         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2034         mbox_t                  *mbox;
2035         scb_t                   *scb;
2036         uint8_t                 nstatus;
2037         uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2038         struct list_head        clist;
2039         int                     handled;
2040         uint32_t                dword;
2041         unsigned long           flags;
2042         int                     i, j;
2043
2044
2045         mbox    = raid_dev->mbox;
2046
2047         // move the SCBs from the firmware completed array to our local list
2048         INIT_LIST_HEAD(&clist);
2049
2050         // loop till F/W has more commands for us to complete
2051         handled = 0;
2052         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2053         do {
2054                 /*
2055                  * Check if a valid interrupt is pending. If found, force the
2056                  * interrupt line low.
2057                  */
2058                 dword = RDOUTDOOR(raid_dev);
2059                 if (dword != 0x10001234) break;
2060
2061                 handled = 1;
2062
2063                 WROUTDOOR(raid_dev, 0x10001234);
2064
2065                 nstatus = 0;
2066                 // wait for valid numstatus to post
2067                 for (i = 0; i < 0xFFFFF; i++) {
2068                         if (mbox->numstatus != 0xFF) {
2069                                 nstatus = mbox->numstatus;
2070                                 break;
2071                         }
2072                         rmb();
2073                 }
2074                 mbox->numstatus = 0xFF;
2075
2076                 adapter->outstanding_cmds -= nstatus;
2077
2078                 for (i = 0; i < nstatus; i++) {
2079
2080                         // wait for valid command index to post
2081                         for (j = 0; j < 0xFFFFF; j++) {
2082                                 if (mbox->completed[i] != 0xFF) break;
2083                                 rmb();
2084                         }
2085                         completed[i]            = mbox->completed[i];
2086                         mbox->completed[i]      = 0xFF;
2087
2088                         if (completed[i] == 0xFF) {
2089                                 con_log(CL_ANN, (KERN_CRIT
2090                                 "megaraid: command posting timed out\n"));
2091
2092                                 BUG();
2093                                 continue;
2094                         }
2095
2096                         // Get SCB associated with this command id
2097                         if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2098                                 // a cmm command
2099                                 scb = adapter->uscb_list + (completed[i] -
2100                                                 MBOX_MAX_SCSI_CMDS);
2101                         }
2102                         else {
2103                                 // an os command
2104                                 scb = adapter->kscb_list + completed[i];
2105                         }
2106
2107                         scb->status = mbox->status;
2108                         list_add_tail(&scb->list, &clist);
2109                 }
2110
2111                 // Acknowledge interrupt
2112                 WRINDOOR(raid_dev, 0x02);
2113
2114         } while(1);
2115
2116         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2117
2118
2119         // put the completed commands in the completed list. DPC would
2120         // complete these commands later
2121         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2122
2123         list_splice(&clist, &adapter->completed_list);
2124
2125         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2126
2127
2128         // schedule the DPC if there is some work for it
2129         if (handled)
2130                 tasklet_schedule(&adapter->dpc_h);
2131
2132         return handled;
2133 }
2134
2135
2136 /**
2137  * megaraid_isr - isr for memory based mailbox based controllers
2138  * @irq         : irq
2139  * @devp        : pointer to our soft state
2140  *
2141  * Interrupt service routine for memory-mapped mailbox controllers.
2142  */
2143 static irqreturn_t
2144 megaraid_isr(int irq, void *devp)
2145 {
2146         adapter_t       *adapter = devp;
2147         int             handled;
2148
2149         handled = megaraid_ack_sequence(adapter);
2150
2151         /* Loop through any pending requests */
2152         if (!adapter->quiescent) {
2153                 megaraid_mbox_runpendq(adapter, NULL);
2154         }
2155
2156         return IRQ_RETVAL(handled);
2157 }
2158
2159
2160 /**
2161  * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2162  * @devp        : pointer to HBA soft state
2163  *
2164  * Pick up the commands from the completed list and send back to the owners.
2165  * This is a reentrant function and does not assume any locks are held while
2166  * it is being called.
2167  */
2168 static void
2169 megaraid_mbox_dpc(unsigned long devp)
2170 {
2171         adapter_t               *adapter = (adapter_t *)devp;
2172         mraid_device_t          *raid_dev;
2173         struct list_head        clist;
2174         struct scatterlist      *sgl;
2175         scb_t                   *scb;
2176         scb_t                   *tmp;
2177         struct scsi_cmnd        *scp;
2178         mraid_passthru_t        *pthru;
2179         mraid_epassthru_t       *epthru;
2180         mbox_ccb_t              *ccb;
2181         int                     islogical;
2182         int                     pdev_index;
2183         int                     pdev_state;
2184         mbox_t                  *mbox;
2185         unsigned long           flags;
2186         uint8_t                 c;
2187         int                     status;
2188         uioc_t                  *kioc;
2189
2190
2191         if (!adapter) return;
2192
2193         raid_dev = ADAP2RAIDDEV(adapter);
2194
2195         // move the SCBs from the completed list to our local list
2196         INIT_LIST_HEAD(&clist);
2197
2198         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2199
2200         list_splice_init(&adapter->completed_list, &clist);
2201
2202         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2203
2204
2205         list_for_each_entry_safe(scb, tmp, &clist, list) {
2206
2207                 status          = scb->status;
2208                 scp             = scb->scp;
2209                 ccb             = (mbox_ccb_t *)scb->ccb;
2210                 pthru           = ccb->pthru;
2211                 epthru          = ccb->epthru;
2212                 mbox            = ccb->mbox;
2213
2214                 // Make sure f/w has completed a valid command
2215                 if (scb->state != SCB_ISSUED) {
2216                         con_log(CL_ANN, (KERN_CRIT
2217                         "megaraid critical err: invalid command %d:%d:%p\n",
2218                                 scb->sno, scb->state, scp));
2219                         BUG();
2220                         continue;       // Must never happen!
2221                 }
2222
2223                 // check for the management command and complete it right away
2224                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2225                         scb->state      = SCB_FREE;
2226                         scb->status     = status;
2227
2228                         // remove from local clist
2229                         list_del_init(&scb->list);
2230
2231                         kioc                    = (uioc_t *)scb->gp;
2232                         kioc->status            = 0;
2233
2234                         megaraid_mbox_mm_done(adapter, scb);
2235
2236                         continue;
2237                 }
2238
2239                 // Was an abort issued for this command earlier
2240                 if (scb->state & SCB_ABORT) {
2241                         con_log(CL_ANN, (KERN_NOTICE
2242                         "megaraid: aborted cmd [%x] completed\n",
2243                                 scb->sno));
2244                 }
2245
2246                 /*
2247                  * If the inquiry came of a disk drive which is not part of
2248                  * any RAID array, expose it to the kernel. For this to be
2249                  * enabled, user must set the "megaraid_expose_unconf_disks"
2250                  * flag to 1 by specifying it on module parameter list.
2251                  * This would enable data migration off drives from other
2252                  * configurations.
2253                  */
2254                 islogical = MRAID_IS_LOGICAL(adapter, scp);
2255                 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2256                                 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2257
2258                         sgl = scsi_sglist(scp);
2259                         if (sg_page(sgl)) {
2260                                 c = *(unsigned char *) sg_virt(&sgl[0]);
2261                         } else {
2262                                 con_log(CL_ANN, (KERN_WARNING
2263                                                  "megaraid mailbox: invalid sg:%d\n",
2264                                                  __LINE__));
2265                                 c = 0;
2266                         }
2267
2268                         if ((c & 0x1F ) == TYPE_DISK) {
2269                                 pdev_index = (scb->dev_channel * 16) +
2270                                         scb->dev_target;
2271                                 pdev_state =
2272                                         raid_dev->pdrv_state[pdev_index] & 0x0F;
2273
2274                                 if (pdev_state == PDRV_ONLINE           ||
2275                                         pdev_state == PDRV_FAILED       ||
2276                                         pdev_state == PDRV_RBLD         ||
2277                                         pdev_state == PDRV_HOTSPARE     ||
2278                                         megaraid_expose_unconf_disks == 0) {
2279
2280                                         status = 0xF0;
2281                                 }
2282                         }
2283                 }
2284
2285                 // Convert MegaRAID status to Linux error code
2286                 switch (status) {
2287
2288                 case 0x00:
2289
2290                         scp->result = (DID_OK << 16);
2291                         break;
2292
2293                 case 0x02:
2294
2295                         /* set sense_buffer and result fields */
2296                         if (mbox->cmd == MBOXCMD_PASSTHRU ||
2297                                 mbox->cmd == MBOXCMD_PASSTHRU64) {
2298
2299                                 memcpy(scp->sense_buffer, pthru->reqsensearea,
2300                                                 14);
2301
2302                                 scp->result = SAM_STAT_CHECK_CONDITION;
2303                         }
2304                         else {
2305                                 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2306
2307                                         memcpy(scp->sense_buffer,
2308                                                 epthru->reqsensearea, 14);
2309
2310                                         scp->result = SAM_STAT_CHECK_CONDITION;
2311                                 } else
2312                                         scsi_build_sense(scp, 0,
2313                                                          ABORTED_COMMAND, 0, 0);
2314                         }
2315                         break;
2316
2317                 case 0x08:
2318
2319                         scp->result = DID_BUS_BUSY << 16 | status;
2320                         break;
2321
2322                 default:
2323
2324                         /*
2325                          * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2326                          * failed
2327                          */
2328                         if (scp->cmnd[0] == TEST_UNIT_READY) {
2329                                 scp->result = DID_ERROR << 16 |
2330                                         SAM_STAT_RESERVATION_CONFLICT;
2331                         }
2332                         else
2333                         /*
2334                          * Error code returned is 1 if Reserve or Release
2335                          * failed or the input parameter is invalid
2336                          */
2337                         if (status == 1 && (scp->cmnd[0] == RESERVE ||
2338                                          scp->cmnd[0] == RELEASE)) {
2339
2340                                 scp->result = DID_ERROR << 16 |
2341                                         SAM_STAT_RESERVATION_CONFLICT;
2342                         }
2343                         else {
2344                                 scp->result = DID_BAD_TARGET << 16 | status;
2345                         }
2346                 }
2347
2348                 // print a debug message for all failed commands
2349                 if (status) {
2350                         megaraid_mbox_display_scb(adapter, scb);
2351                 }
2352
2353                 scsi_dma_unmap(scp);
2354
2355                 // remove from local clist
2356                 list_del_init(&scb->list);
2357
2358                 // put back in free list
2359                 megaraid_dealloc_scb(adapter, scb);
2360
2361                 // send the scsi packet back to kernel
2362                 scsi_done(scp);
2363         }
2364
2365         return;
2366 }
2367
2368
2369 /**
2370  * megaraid_abort_handler - abort the scsi command
2371  * @scp         : command to be aborted
2372  *
2373  * Abort a previous SCSI request. Only commands on the pending list can be
2374  * aborted. All the commands issued to the F/W must complete.
2375  **/
2376 static int
2377 megaraid_abort_handler(struct scsi_cmnd *scp)
2378 {
2379         adapter_t               *adapter;
2380         mraid_device_t          *raid_dev;
2381         scb_t                   *scb;
2382         scb_t                   *tmp;
2383         int                     found;
2384         unsigned long           flags;
2385         int                     i;
2386
2387
2388         adapter         = SCP2ADAPTER(scp);
2389         raid_dev        = ADAP2RAIDDEV(adapter);
2390
2391         con_log(CL_ANN, (KERN_WARNING
2392                 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n",
2393                 scp->cmnd[0], SCP2CHANNEL(scp),
2394                 SCP2TARGET(scp), SCP2LUN(scp)));
2395
2396         // If FW has stopped responding, simply return failure
2397         if (raid_dev->hw_error) {
2398                 con_log(CL_ANN, (KERN_NOTICE
2399                         "megaraid: hw error, not aborting\n"));
2400                 return FAILED;
2401         }
2402
2403         // There might a race here, where the command was completed by the
2404         // firmware and now it is on the completed list. Before we could
2405         // complete the command to the kernel in dpc, the abort came.
2406         // Find out if this is the case to avoid the race.
2407         scb = NULL;
2408         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2409         list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2410
2411                 if (scb->scp == scp) {  // Found command
2412
2413                         list_del_init(&scb->list);      // from completed list
2414
2415                         con_log(CL_ANN, (KERN_WARNING
2416                         "megaraid: %d[%d:%d], abort from completed list\n",
2417                                 scb->sno, scb->dev_channel, scb->dev_target));
2418
2419                         scp->result = (DID_ABORT << 16);
2420                         scsi_done(scp);
2421
2422                         megaraid_dealloc_scb(adapter, scb);
2423
2424                         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2425                                 flags);
2426
2427                         return SUCCESS;
2428                 }
2429         }
2430         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2431
2432
2433         // Find out if this command is still on the pending list. If it is and
2434         // was never issued, abort and return success. If the command is owned
2435         // by the firmware, we must wait for it to complete by the FW.
2436         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2437         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2438
2439                 if (scb->scp == scp) {  // Found command
2440
2441                         list_del_init(&scb->list);      // from pending list
2442
2443                         ASSERT(!(scb->state & SCB_ISSUED));
2444
2445                         con_log(CL_ANN, (KERN_WARNING
2446                                 "megaraid abort: [%d:%d], driver owner\n",
2447                                 scb->dev_channel, scb->dev_target));
2448
2449                         scp->result = (DID_ABORT << 16);
2450                         scsi_done(scp);
2451
2452                         megaraid_dealloc_scb(adapter, scb);
2453
2454                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2455                                 flags);
2456
2457                         return SUCCESS;
2458                 }
2459         }
2460         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2461
2462
2463         // Check do we even own this command, in which case this would be
2464         // owned by the firmware. The only way to locate the FW scb is to
2465         // traverse through the list of all SCB, since driver does not
2466         // maintain these SCBs on any list
2467         found = 0;
2468         spin_lock_irq(&adapter->lock);
2469         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2470                 scb = adapter->kscb_list + i;
2471
2472                 if (scb->scp == scp) {
2473
2474                         found = 1;
2475
2476                         if (!(scb->state & SCB_ISSUED)) {
2477                                 con_log(CL_ANN, (KERN_WARNING
2478                                 "megaraid abort: %d[%d:%d], invalid state\n",
2479                                 scb->sno, scb->dev_channel, scb->dev_target));
2480                                 BUG();
2481                         }
2482                         else {
2483                                 con_log(CL_ANN, (KERN_WARNING
2484                                 "megaraid abort: %d[%d:%d], fw owner\n",
2485                                 scb->sno, scb->dev_channel, scb->dev_target));
2486                         }
2487                 }
2488         }
2489         spin_unlock_irq(&adapter->lock);
2490
2491         if (!found) {
2492                 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n"));
2493
2494                 // FIXME: Should there be a callback for this command?
2495                 return SUCCESS;
2496         }
2497
2498         // We cannot actually abort a command owned by firmware, return
2499         // failure and wait for reset. In host reset handler, we will find out
2500         // if the HBA is still live
2501         return FAILED;
2502 }
2503
2504 /**
2505  * megaraid_reset_handler - device reset handler for mailbox based driver
2506  * @scp         : reference command
2507  *
2508  * Reset handler for the mailbox based controller. First try to find out if
2509  * the FW is still live, in which case the outstanding commands counter mut go
2510  * down to 0. If that happens, also issue the reservation reset command to
2511  * relinquish (possible) reservations on the logical drives connected to this
2512  * host.
2513  **/
2514 static int
2515 megaraid_reset_handler(struct scsi_cmnd *scp)
2516 {
2517         adapter_t       *adapter;
2518         scb_t           *scb;
2519         scb_t           *tmp;
2520         mraid_device_t  *raid_dev;
2521         unsigned long   flags;
2522         uint8_t         raw_mbox[sizeof(mbox_t)];
2523         int             rval;
2524         int             recovery_window;
2525         int             i;
2526         uioc_t          *kioc;
2527
2528         adapter         = SCP2ADAPTER(scp);
2529         raid_dev        = ADAP2RAIDDEV(adapter);
2530
2531         // return failure if adapter is not responding
2532         if (raid_dev->hw_error) {
2533                 con_log(CL_ANN, (KERN_NOTICE
2534                         "megaraid: hw error, cannot reset\n"));
2535                 return FAILED;
2536         }
2537
2538         // Under exceptional conditions, FW can take up to 3 minutes to
2539         // complete command processing. Wait for additional 2 minutes for the
2540         // pending commands counter to go down to 0. If it doesn't, let the
2541         // controller be marked offline
2542         // Also, reset all the commands currently owned by the driver
2543         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2544         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2545                 list_del_init(&scb->list);      // from pending list
2546
2547                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2548                         con_log(CL_ANN, (KERN_WARNING
2549                         "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2550                         scb->sno, scb->dev_channel, scb->dev_target));
2551
2552                         scb->status = -1;
2553
2554                         kioc                    = (uioc_t *)scb->gp;
2555                         kioc->status            = -EFAULT;
2556
2557                         megaraid_mbox_mm_done(adapter, scb);
2558                 } else {
2559                         if (scb->scp == scp) {  // Found command
2560                                 con_log(CL_ANN, (KERN_WARNING
2561                                         "megaraid: %d[%d:%d], reset from pending list\n",
2562                                         scb->sno, scb->dev_channel, scb->dev_target));
2563                         } else {
2564                                 con_log(CL_ANN, (KERN_WARNING
2565                                 "megaraid: IO packet with %d[%d:%d] being reset\n",
2566                                 scb->sno, scb->dev_channel, scb->dev_target));
2567                         }
2568
2569                         scb->scp->result = (DID_RESET << 16);
2570                         scsi_done(scb->scp);
2571
2572                         megaraid_dealloc_scb(adapter, scb);
2573                 }
2574         }
2575         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2576
2577         if (adapter->outstanding_cmds) {
2578                 con_log(CL_ANN, (KERN_NOTICE
2579                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2580                         adapter->outstanding_cmds,
2581                         (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2582         }
2583
2584         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2585
2586         for (i = 0; i < recovery_window; i++) {
2587
2588                 megaraid_ack_sequence(adapter);
2589
2590                 // print a message once every 5 seconds only
2591                 if (!(i % 5)) {
2592                         con_log(CL_ANN, (
2593                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2594                                 adapter->outstanding_cmds,
2595                                 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2596                 }
2597
2598                 // bailout if no recovery happened in reset time
2599                 if (adapter->outstanding_cmds == 0) {
2600                         break;
2601                 }
2602
2603                 msleep(1000);
2604         }
2605
2606         spin_lock(&adapter->lock);
2607
2608         // If still outstanding commands, bail out
2609         if (adapter->outstanding_cmds) {
2610                 con_log(CL_ANN, (KERN_WARNING
2611                         "megaraid mbox: critical hardware error!\n"));
2612
2613                 raid_dev->hw_error = 1;
2614
2615                 rval = FAILED;
2616                 goto out;
2617         }
2618         else {
2619                 con_log(CL_ANN, (KERN_NOTICE
2620                 "megaraid mbox: reset sequence completed successfully\n"));
2621         }
2622
2623
2624         // If the controller supports clustering, reset reservations
2625         if (!adapter->ha) {
2626                 rval = SUCCESS;
2627                 goto out;
2628         }
2629
2630         // clear reservations if any
2631         raw_mbox[0] = CLUSTER_CMD;
2632         raw_mbox[2] = RESET_RESERVATIONS;
2633
2634         rval = SUCCESS;
2635         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2636                 con_log(CL_ANN,
2637                         (KERN_INFO "megaraid: reservation reset\n"));
2638         }
2639         else {
2640                 rval = FAILED;
2641                 con_log(CL_ANN, (KERN_WARNING
2642                                 "megaraid: reservation reset failed\n"));
2643         }
2644
2645  out:
2646         spin_unlock(&adapter->lock);
2647         return rval;
2648 }
2649
2650 /*
2651  * START: internal commands library
2652  *
2653  * This section of the driver has the common routine used by the driver and
2654  * also has all the FW routines
2655  */
2656
2657 /**
2658  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2659  * @adapter     : controller's soft state
2660  * @raw_mbox    : the mailbox
2661  *
2662  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2663  * controllers.
2664  */
2665 static int
2666 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2667 {
2668         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2669         mbox_t          *mbox;
2670         uint8_t         status;
2671         int             i;
2672
2673         mbox    = raid_dev->mbox;
2674
2675         /*
2676          * Wait until mailbox is free
2677          */
2678         if (megaraid_busywait_mbox(raid_dev) != 0)
2679                 goto blocked_mailbox;
2680
2681         /*
2682          * Copy mailbox data into host structure
2683          */
2684         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2685         mbox->cmdid             = 0xFE;
2686         mbox->busy              = 1;
2687         mbox->poll              = 0;
2688         mbox->ack               = 0;
2689         mbox->numstatus         = 0xFF;
2690         mbox->status            = 0xFF;
2691
2692         wmb();
2693         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2694
2695         // wait for maximum 1 second for status to post. If the status is not
2696         // available within 1 second, assume FW is initializing and wait
2697         // for an extended amount of time
2698         if (mbox->numstatus == 0xFF) {  // status not yet available
2699                 udelay(25);
2700
2701                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2702                         rmb();
2703                         msleep(1);
2704                 }
2705
2706
2707                 if (i == 1000) {
2708                         con_log(CL_ANN, (KERN_NOTICE
2709                                 "megaraid mailbox: wait for FW to boot      "));
2710
2711                         for (i = 0; (mbox->numstatus == 0xFF) &&
2712                                         (i < MBOX_RESET_WAIT); i++) {
2713                                 rmb();
2714                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2715                                                         MBOX_RESET_WAIT - i));
2716                                 msleep(1000);
2717                         }
2718
2719                         if (i == MBOX_RESET_WAIT) {
2720
2721                                 con_log(CL_ANN, (
2722                                 "\nmegaraid mailbox: status not available\n"));
2723
2724                                 return -1;
2725                         }
2726                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2727                 }
2728         }
2729
2730         // wait for maximum 1 second for poll semaphore
2731         if (mbox->poll != 0x77) {
2732                 udelay(25);
2733
2734                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2735                         rmb();
2736                         msleep(1);
2737                 }
2738
2739                 if (i == 1000) {
2740                         con_log(CL_ANN, (KERN_WARNING
2741                         "megaraid mailbox: could not get poll semaphore\n"));
2742                         return -1;
2743                 }
2744         }
2745
2746         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2747         wmb();
2748
2749         // wait for maximum 1 second for acknowledgement
2750         if (RDINDOOR(raid_dev) & 0x2) {
2751                 udelay(25);
2752
2753                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2754                         rmb();
2755                         msleep(1);
2756                 }
2757
2758                 if (i == 1000) {
2759                         con_log(CL_ANN, (KERN_WARNING
2760                                 "megaraid mailbox: could not acknowledge\n"));
2761                         return -1;
2762                 }
2763         }
2764         mbox->poll      = 0;
2765         mbox->ack       = 0x77;
2766
2767         status = mbox->status;
2768
2769         // invalidate the completed command id array. After command
2770         // completion, firmware would write the valid id.
2771         mbox->numstatus = 0xFF;
2772         mbox->status    = 0xFF;
2773         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2774                 mbox->completed[i] = 0xFF;
2775         }
2776
2777         return status;
2778
2779 blocked_mailbox:
2780
2781         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2782         return -1;
2783 }
2784
2785
2786 /**
2787  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2788  * @adapter     : controller's soft state
2789  * @raw_mbox    : the mailbox
2790  *
2791  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2792  * controllers. This is a faster version of the synchronous command and
2793  * therefore can be called in interrupt-context as well.
2794  */
2795 static int
2796 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2797 {
2798         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2799         mbox_t          *mbox;
2800         long            i;
2801
2802
2803         mbox    = raid_dev->mbox;
2804
2805         // return immediately if the mailbox is busy
2806         if (mbox->busy) return -1;
2807
2808         // Copy mailbox data into host structure
2809         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2810         mbox->cmdid             = 0xFE;
2811         mbox->busy              = 1;
2812         mbox->poll              = 0;
2813         mbox->ack               = 0;
2814         mbox->numstatus         = 0xFF;
2815         mbox->status            = 0xFF;
2816
2817         wmb();
2818         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2819
2820         for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2821                 if (mbox->numstatus != 0xFF) break;
2822                 rmb();
2823                 udelay(MBOX_SYNC_DELAY_200);
2824         }
2825
2826         if (i == MBOX_SYNC_WAIT_CNT) {
2827                 // We may need to re-calibrate the counter
2828                 con_log(CL_ANN, (KERN_CRIT
2829                         "megaraid: fast sync command timed out\n"));
2830         }
2831
2832         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2833         wmb();
2834
2835         return mbox->status;
2836 }
2837
2838
2839 /**
2840  * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2841  * @raid_dev    : RAID device (HBA) soft state
2842  *
2843  * Wait until the controller's mailbox is available to accept more commands.
2844  * Wait for at most 1 second.
2845  */
2846 static int
2847 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2848 {
2849         mbox_t  *mbox = raid_dev->mbox;
2850         int     i = 0;
2851
2852         if (mbox->busy) {
2853                 udelay(25);
2854                 for (i = 0; mbox->busy && i < 1000; i++)
2855                         msleep(1);
2856         }
2857
2858         if (i < 1000) return 0;
2859         else return -1;
2860 }
2861
2862
2863 /**
2864  * megaraid_mbox_product_info - some static information about the controller
2865  * @adapter     : our soft state
2866  *
2867  * Issue commands to the controller to grab some parameters required by our
2868  * caller.
2869  */
2870 static int
2871 megaraid_mbox_product_info(adapter_t *adapter)
2872 {
2873         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2874         mbox_t                  *mbox;
2875         uint8_t                 raw_mbox[sizeof(mbox_t)];
2876         mraid_pinfo_t           *pinfo;
2877         dma_addr_t              pinfo_dma_h;
2878         mraid_inquiry3_t        *mraid_inq3;
2879         int                     i;
2880
2881
2882         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2883         mbox = (mbox_t *)raw_mbox;
2884
2885         /*
2886          * Issue an ENQUIRY3 command to find out certain adapter parameters,
2887          * e.g., max channels, max commands etc.
2888          */
2889         pinfo = dma_alloc_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2890                                    &pinfo_dma_h, GFP_KERNEL);
2891         if (pinfo == NULL) {
2892                 con_log(CL_ANN, (KERN_WARNING
2893                         "megaraid: out of memory, %s %d\n", __func__,
2894                         __LINE__));
2895
2896                 return -1;
2897         }
2898
2899         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2900         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2901
2902         raw_mbox[0] = FC_NEW_CONFIG;
2903         raw_mbox[2] = NC_SUBOP_ENQUIRY3;
2904         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
2905
2906         // Issue the command
2907         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2908
2909                 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
2910
2911                 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2912                         pinfo, pinfo_dma_h);
2913
2914                 return -1;
2915         }
2916
2917         /*
2918          * Collect information about state of each physical drive
2919          * attached to the controller. We will expose all the disks
2920          * which are not part of RAID
2921          */
2922         mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
2923         for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
2924                 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
2925         }
2926
2927         /*
2928          * Get product info for information like number of channels,
2929          * maximum commands supported.
2930          */
2931         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2932         mbox->xferaddr = (uint32_t)pinfo_dma_h;
2933
2934         raw_mbox[0] = FC_NEW_CONFIG;
2935         raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
2936
2937         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2938
2939                 con_log(CL_ANN, (KERN_WARNING
2940                         "megaraid: product info failed\n"));
2941
2942                 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2943                         pinfo, pinfo_dma_h);
2944
2945                 return -1;
2946         }
2947
2948         /*
2949          * Setup some parameters for host, as required by our caller
2950          */
2951         adapter->max_channel = pinfo->nchannels;
2952
2953         /*
2954          * we will export all the logical drives on a single channel.
2955          * Add 1 since inquires do not come for inititor ID
2956          */
2957         adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
2958         adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
2959
2960         /*
2961          * These are the maximum outstanding commands for the scsi-layer
2962          */
2963         adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
2964
2965         memset(adapter->fw_version, 0, VERSION_SIZE);
2966         memset(adapter->bios_version, 0, VERSION_SIZE);
2967
2968         memcpy(adapter->fw_version, pinfo->fw_version, 4);
2969         adapter->fw_version[4] = 0;
2970
2971         memcpy(adapter->bios_version, pinfo->bios_version, 4);
2972         adapter->bios_version[4] = 0;
2973
2974         con_log(CL_ANN, (KERN_NOTICE
2975                 "megaraid: fw version:[%s] bios version:[%s]\n",
2976                 adapter->fw_version, adapter->bios_version));
2977
2978         dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), pinfo,
2979                         pinfo_dma_h);
2980
2981         return 0;
2982 }
2983
2984
2985
2986 /**
2987  * megaraid_mbox_extended_cdb - check for support for extended CDBs
2988  * @adapter     : soft state for the controller
2989  *
2990  * This routine check whether the controller in question supports extended
2991  * ( > 10 bytes ) CDBs.
2992  */
2993 static int
2994 megaraid_mbox_extended_cdb(adapter_t *adapter)
2995 {
2996         mbox_t          *mbox;
2997         uint8_t         raw_mbox[sizeof(mbox_t)];
2998         int             rval;
2999
3000         mbox = (mbox_t *)raw_mbox;
3001
3002         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3003         mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3004
3005         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3006
3007         raw_mbox[0] = MAIN_MISC_OPCODE;
3008         raw_mbox[2] = SUPPORT_EXT_CDB;
3009
3010         /*
3011          * Issue the command
3012          */
3013         rval = 0;
3014         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3015                 rval = -1;
3016         }
3017
3018         return rval;
3019 }
3020
3021
3022 /**
3023  * megaraid_mbox_support_ha - Do we support clustering
3024  * @adapter     : soft state for the controller
3025  * @init_id     : ID of the initiator
3026  *
3027  * Determine if the firmware supports clustering and the ID of the initiator.
3028  */
3029 static int
3030 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3031 {
3032         mbox_t          *mbox;
3033         uint8_t         raw_mbox[sizeof(mbox_t)];
3034         int             rval;
3035
3036
3037         mbox = (mbox_t *)raw_mbox;
3038
3039         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3040
3041         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3042
3043         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3044
3045         raw_mbox[0] = GET_TARGET_ID;
3046
3047         // Issue the command
3048         *init_id = 7;
3049         rval =  -1;
3050         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3051
3052                 *init_id = *(uint8_t *)adapter->ibuf;
3053
3054                 con_log(CL_ANN, (KERN_INFO
3055                         "megaraid: cluster firmware, initiator ID: %d\n",
3056                         *init_id));
3057
3058                 rval =  0;
3059         }
3060
3061         return rval;
3062 }
3063
3064
3065 /**
3066  * megaraid_mbox_support_random_del - Do we support random deletion
3067  * @adapter     : soft state for the controller
3068  *
3069  * Determine if the firmware supports random deletion.
3070  * Return:      1 is operation supported, 0 otherwise
3071  */
3072 static int
3073 megaraid_mbox_support_random_del(adapter_t *adapter)
3074 {
3075         uint8_t         raw_mbox[sizeof(mbox_t)];
3076         int             rval;
3077
3078         /*
3079          * Newer firmware on Dell CERC expect a different
3080          * random deletion handling, so disable it.
3081          */
3082         if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3083             adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3084             adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3085             adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3086             (adapter->fw_version[0] > '6' ||
3087              (adapter->fw_version[0] == '6' &&
3088               adapter->fw_version[2] > '6') ||
3089              (adapter->fw_version[0] == '6'
3090               && adapter->fw_version[2] == '6'
3091               && adapter->fw_version[3] > '1'))) {
3092                 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3093                 return 0;
3094         }
3095
3096         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3097
3098         raw_mbox[0] = FC_DEL_LOGDRV;
3099         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3100
3101         // Issue the command
3102         rval = 0;
3103         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3104
3105                 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3106
3107                 rval =  1;
3108         }
3109
3110         return rval;
3111 }
3112
3113
3114 /**
3115  * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3116  * @adapter     : soft state for the controller
3117  *
3118  * Find out the maximum number of scatter-gather elements supported by the
3119  * firmware.
3120  */
3121 static int
3122 megaraid_mbox_get_max_sg(adapter_t *adapter)
3123 {
3124         mbox_t          *mbox;
3125         uint8_t         raw_mbox[sizeof(mbox_t)];
3126         int             nsg;
3127
3128
3129         mbox = (mbox_t *)raw_mbox;
3130
3131         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3132
3133         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3134
3135         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3136
3137         raw_mbox[0] = MAIN_MISC_OPCODE;
3138         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3139
3140         // Issue the command
3141         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3142                 nsg =  *(uint8_t *)adapter->ibuf;
3143         }
3144         else {
3145                 nsg =  MBOX_DEFAULT_SG_SIZE;
3146         }
3147
3148         if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3149
3150         return nsg;
3151 }
3152
3153
3154 /**
3155  * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3156  * @adapter     : soft state for the controller
3157  *
3158  * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3159  * can be exported as regular SCSI channels.
3160  */
3161 static void
3162 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3163 {
3164         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3165         mbox_t          *mbox;
3166         uint8_t         raw_mbox[sizeof(mbox_t)];
3167
3168
3169         mbox = (mbox_t *)raw_mbox;
3170
3171         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3172
3173         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3174
3175         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3176
3177         raw_mbox[0] = CHNL_CLASS;
3178         raw_mbox[2] = GET_CHNL_CLASS;
3179
3180         // Issue the command. If the command fails, all channels are RAID
3181         // channels
3182         raid_dev->channel_class = 0xFF;
3183         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3184                 raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3185         }
3186
3187         return;
3188 }
3189
3190
3191 /**
3192  * megaraid_mbox_flush_cache - flush adapter and disks cache
3193  * @adapter             : soft state for the controller
3194  *
3195  * Flush adapter cache followed by disks cache.
3196  */
3197 static void
3198 megaraid_mbox_flush_cache(adapter_t *adapter)
3199 {
3200         uint8_t raw_mbox[sizeof(mbox_t)];
3201
3202         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3203
3204         raw_mbox[0] = FLUSH_ADAPTER;
3205
3206         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3207                 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3208         }
3209
3210         raw_mbox[0] = FLUSH_SYSTEM;
3211
3212         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3213                 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3214         }
3215
3216         return;
3217 }
3218
3219
3220 /**
3221  * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3222  * @adapter             : soft state for the controller
3223  *
3224  * Clears the pending cmds in FW and reinits its RAID structs.
3225  */
3226 static int
3227 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3228 {
3229         mbox_t  *mbox;
3230         uint8_t raw_mbox[sizeof(mbox_t)];
3231         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3232         int     status = 0;
3233         int i;
3234         uint32_t dword;
3235
3236         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3237
3238         raw_mbox[0] = 0xFF;
3239
3240         mbox    = raid_dev->mbox;
3241
3242         /* Wait until mailbox is free */
3243         if (megaraid_busywait_mbox(raid_dev) != 0) {
3244                 status = 1;
3245                 goto blocked_mailbox;
3246         }
3247
3248         /* Copy mailbox data into host structure */
3249         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3250         mbox->cmdid             = 0xFE;
3251         mbox->busy              = 1;
3252         mbox->poll              = 0;
3253         mbox->ack               = 0;
3254         mbox->numstatus         = 0;
3255         mbox->status            = 0;
3256
3257         wmb();
3258         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3259
3260         /* Wait for maximum 1 min for status to post.
3261          * If the Firmware SUPPORTS the ABOVE COMMAND,
3262          * mbox->cmd will be set to 0
3263          * else
3264          * the firmware will reject the command with
3265          * mbox->numstatus set to 1
3266          */
3267
3268         i = 0;
3269         status = 0;
3270         while (!mbox->numstatus && mbox->cmd == 0xFF) {
3271                 rmb();
3272                 msleep(1);
3273                 i++;
3274                 if (i > 1000 * 60) {
3275                         status = 1;
3276                         break;
3277                 }
3278         }
3279         if (mbox->numstatus == 1)
3280                 status = 1; /*cmd not supported*/
3281
3282         /* Check for interrupt line */
3283         dword = RDOUTDOOR(raid_dev);
3284         WROUTDOOR(raid_dev, dword);
3285         WRINDOOR(raid_dev,2);
3286
3287         return status;
3288
3289 blocked_mailbox:
3290         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3291         return status;
3292 }
3293
3294 /**
3295  * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3296  * @adapter             : controller's soft state
3297  * @scb                 : SCB to be displayed
3298  *
3299  * Diplay information about the given SCB iff the current debug level is
3300  * verbose.
3301  */
3302 static void
3303 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3304 {
3305         mbox_ccb_t              *ccb;
3306         struct scsi_cmnd        *scp;
3307         mbox_t                  *mbox;
3308         int                     level;
3309         int                     i;
3310
3311
3312         ccb     = (mbox_ccb_t *)scb->ccb;
3313         scp     = scb->scp;
3314         mbox    = ccb->mbox;
3315
3316         level = CL_DLEVEL3;
3317
3318         con_log(level, (KERN_NOTICE
3319                 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3320                 mbox->cmd, scb->sno));
3321
3322         con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3323                 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3324                 mbox->numsge));
3325
3326         if (!scp) return;
3327
3328         con_log(level, (KERN_NOTICE "scsi cmnd: "));
3329
3330         for (i = 0; i < scp->cmd_len; i++) {
3331                 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3332         }
3333
3334         con_log(level, ("\n"));
3335
3336         return;
3337 }
3338
3339
3340 /**
3341  * megaraid_mbox_setup_device_map - manage device ids
3342  * @adapter     : Driver's soft state
3343  *
3344  * Manage the device ids to have an appropriate mapping between the kernel
3345  * scsi addresses and megaraid scsi and logical drive addresses. We export
3346  * scsi devices on their actual addresses, whereas the logical drives are
3347  * exported on a virtual scsi channel.
3348  */
3349 static void
3350 megaraid_mbox_setup_device_map(adapter_t *adapter)
3351 {
3352         uint8_t         c;
3353         uint8_t         t;
3354
3355         /*
3356          * First fill the values on the logical drive channel
3357          */
3358         for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3359                 adapter->device_ids[adapter->max_channel][t] =
3360                         (t < adapter->init_id) ?  t : t - 1;
3361
3362         adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3363
3364         /*
3365          * Fill the values on the physical devices channels
3366          */
3367         for (c = 0; c < adapter->max_channel; c++)
3368                 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3369                         adapter->device_ids[c][t] = (c << 8) | t;
3370 }
3371
3372
3373 /*
3374  * END: internal commands library
3375  */
3376
3377 /*
3378  * START: Interface for the common management module
3379  *
3380  * This is the module, which interfaces with the common management module to
3381  * provide support for ioctl and sysfs
3382  */
3383
3384 /**
3385  * megaraid_cmm_register - register with the management module
3386  * @adapter             : HBA soft state
3387  *
3388  * Register with the management module, which allows applications to issue
3389  * ioctl calls to the drivers. This interface is used by the management module
3390  * to setup sysfs support as well.
3391  */
3392 static int
3393 megaraid_cmm_register(adapter_t *adapter)
3394 {
3395         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3396         mraid_mmadp_t   adp;
3397         scb_t           *scb;
3398         mbox_ccb_t      *ccb;
3399         int             rval;
3400         int             i;
3401
3402         // Allocate memory for the base list of scb for management module.
3403         adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3404
3405         if (adapter->uscb_list == NULL) {
3406                 con_log(CL_ANN, (KERN_WARNING
3407                         "megaraid: out of memory, %s %d\n", __func__,
3408                         __LINE__));
3409                 return -1;
3410         }
3411
3412
3413         // Initialize the synchronization parameters for resources for
3414         // commands for management module
3415         INIT_LIST_HEAD(&adapter->uscb_pool);
3416
3417         spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3418
3419
3420
3421         // link all the packets. Note, CCB for commands, coming from the
3422         // commom management module, mailbox physical address are already
3423         // setup by it. We just need placeholder for that in our local command
3424         // control blocks
3425         for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3426
3427                 scb                     = adapter->uscb_list + i;
3428                 ccb                     = raid_dev->uccb_list + i;
3429
3430                 scb->ccb                = (caddr_t)ccb;
3431                 ccb->mbox64             = raid_dev->umbox64 + i;
3432                 ccb->mbox               = &ccb->mbox64->mbox32;
3433                 ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3434
3435                 scb->gp                 = 0;
3436
3437                 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3438                 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3439                 scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3440
3441                 scb->scp                = NULL;
3442                 scb->state              = SCB_FREE;
3443                 scb->dma_direction      = DMA_NONE;
3444                 scb->dma_type           = MRAID_DMA_NONE;
3445                 scb->dev_channel        = -1;
3446                 scb->dev_target         = -1;
3447
3448                 // put scb in the free pool
3449                 list_add_tail(&scb->list, &adapter->uscb_pool);
3450         }
3451
3452         adp.unique_id           = adapter->unique_id;
3453         adp.drvr_type           = DRVRTYPE_MBOX;
3454         adp.drvr_data           = (unsigned long)adapter;
3455         adp.pdev                = adapter->pdev;
3456         adp.issue_uioc          = megaraid_mbox_mm_handler;
3457         adp.timeout             = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3458         adp.max_kioc            = MBOX_MAX_USER_CMDS;
3459
3460         if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3461
3462                 con_log(CL_ANN, (KERN_WARNING
3463                         "megaraid mbox: did not register with CMM\n"));
3464
3465                 kfree(adapter->uscb_list);
3466         }
3467
3468         return rval;
3469 }
3470
3471
3472 /**
3473  * megaraid_cmm_unregister - un-register with the management module
3474  * @adapter             : HBA soft state
3475  *
3476  * Un-register with the management module.
3477  * FIXME: mgmt module must return failure for unregister if it has pending
3478  * commands in LLD.
3479  */
3480 static int
3481 megaraid_cmm_unregister(adapter_t *adapter)
3482 {
3483         kfree(adapter->uscb_list);
3484         mraid_mm_unregister_adp(adapter->unique_id);
3485         return 0;
3486 }
3487
3488
3489 /**
3490  * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3491  * @drvr_data           : LLD specific data
3492  * @kioc                : CMM interface packet
3493  * @action              : command action
3494  *
3495  * This routine is invoked whenever the Common Management Module (CMM) has a
3496  * command for us. The 'action' parameter specifies if this is a new command
3497  * or otherwise.
3498  */
3499 static int
3500 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3501 {
3502         adapter_t *adapter;
3503
3504         if (action != IOCTL_ISSUE) {
3505                 con_log(CL_ANN, (KERN_WARNING
3506                         "megaraid: unsupported management action:%#2x\n",
3507                         action));
3508                 return (-ENOTSUPP);
3509         }
3510
3511         adapter = (adapter_t *)drvr_data;
3512
3513         // make sure this adapter is not being detached right now.
3514         if (atomic_read(&adapter->being_detached)) {
3515                 con_log(CL_ANN, (KERN_WARNING
3516                         "megaraid: reject management request, detaching\n"));
3517                 return (-ENODEV);
3518         }
3519
3520         switch (kioc->opcode) {
3521
3522         case GET_ADAP_INFO:
3523
3524                 kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3525                                         (unsigned long)kioc->buf_vaddr);
3526
3527                 kioc->done(kioc);
3528
3529                 return kioc->status;
3530
3531         case MBOX_CMD:
3532
3533                 return megaraid_mbox_mm_command(adapter, kioc);
3534
3535         default:
3536                 kioc->status = (-EINVAL);
3537                 kioc->done(kioc);
3538                 return (-EINVAL);
3539         }
3540
3541         return 0;       // not reached
3542 }
3543
3544 /**
3545  * megaraid_mbox_mm_command - issues commands routed through CMM
3546  * @adapter             : HBA soft state
3547  * @kioc                : management command packet
3548  *
3549  * Issues commands, which are routed through the management module.
3550  */
3551 static int
3552 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3553 {
3554         struct list_head        *head = &adapter->uscb_pool;
3555         mbox64_t                *mbox64;
3556         uint8_t                 *raw_mbox;
3557         scb_t                   *scb;
3558         mbox_ccb_t              *ccb;
3559         unsigned long           flags;
3560
3561         // detach one scb from free pool
3562         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3563
3564         if (list_empty(head)) { // should never happen because of CMM
3565
3566                 con_log(CL_ANN, (KERN_WARNING
3567                         "megaraid mbox: bug in cmm handler, lost resources\n"));
3568
3569                 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3570
3571                 return (-EINVAL);
3572         }
3573
3574         scb = list_entry(head->next, scb_t, list);
3575         list_del_init(&scb->list);
3576
3577         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3578
3579         scb->state              = SCB_ACTIVE;
3580         scb->dma_type           = MRAID_DMA_NONE;
3581         scb->dma_direction      = DMA_NONE;
3582
3583         ccb             = (mbox_ccb_t *)scb->ccb;
3584         mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3585         raw_mbox        = (uint8_t *)&mbox64->mbox32;
3586
3587         memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3588
3589         scb->gp         = (unsigned long)kioc;
3590
3591         /*
3592          * If it is a logdrv random delete operation, we have to wait till
3593          * there are no outstanding cmds at the fw and then issue it directly
3594          */
3595         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3596
3597                 if (wait_till_fw_empty(adapter)) {
3598                         con_log(CL_ANN, (KERN_NOTICE
3599                                 "megaraid mbox: LD delete, timed out\n"));
3600
3601                         kioc->status = -ETIME;
3602
3603                         scb->status = -1;
3604
3605                         megaraid_mbox_mm_done(adapter, scb);
3606
3607                         return (-ETIME);
3608                 }
3609
3610                 INIT_LIST_HEAD(&scb->list);
3611
3612                 scb->state = SCB_ISSUED;
3613                 if (mbox_post_cmd(adapter, scb) != 0) {
3614
3615                         con_log(CL_ANN, (KERN_NOTICE
3616                                 "megaraid mbox: LD delete, mailbox busy\n"));
3617
3618                         kioc->status = -EBUSY;
3619
3620                         scb->status = -1;
3621
3622                         megaraid_mbox_mm_done(adapter, scb);
3623
3624                         return (-EBUSY);
3625                 }
3626
3627                 return 0;
3628         }
3629
3630         // put the command on the pending list and execute
3631         megaraid_mbox_runpendq(adapter, scb);
3632
3633         return 0;
3634 }
3635
3636
3637 static int
3638 wait_till_fw_empty(adapter_t *adapter)
3639 {
3640         unsigned long   flags = 0;
3641         int             i;
3642
3643
3644         /*
3645          * Set the quiescent flag to stop issuing cmds to FW.
3646          */
3647         spin_lock_irqsave(&adapter->lock, flags);
3648         adapter->quiescent++;
3649         spin_unlock_irqrestore(&adapter->lock, flags);
3650
3651         /*
3652          * Wait till there are no more cmds outstanding at FW. Try for at most
3653          * 60 seconds
3654          */
3655         for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3656                 con_log(CL_DLEVEL1, (KERN_INFO
3657                         "megaraid: FW has %d pending commands\n",
3658                         adapter->outstanding_cmds));
3659
3660                 msleep(1000);
3661         }
3662
3663         return adapter->outstanding_cmds;
3664 }
3665
3666
3667 /**
3668  * megaraid_mbox_mm_done - callback for CMM commands
3669  * @adapter     : HBA soft state
3670  * @scb         : completed command
3671  *
3672  * Callback routine for internal commands originated from the management
3673  * module.
3674  */
3675 static void
3676 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3677 {
3678         uioc_t                  *kioc;
3679         mbox64_t                *mbox64;
3680         uint8_t                 *raw_mbox;
3681         unsigned long           flags;
3682
3683         kioc                    = (uioc_t *)scb->gp;
3684         mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3685         mbox64->mbox32.status   = scb->status;
3686         raw_mbox                = (uint8_t *)&mbox64->mbox32;
3687
3688
3689         // put scb in the free pool
3690         scb->state      = SCB_FREE;
3691         scb->scp        = NULL;
3692
3693         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3694
3695         list_add(&scb->list, &adapter->uscb_pool);
3696
3697         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3698
3699         // if a delete logical drive operation succeeded, restart the
3700         // controller
3701         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3702
3703                 adapter->quiescent--;
3704
3705                 megaraid_mbox_runpendq(adapter, NULL);
3706         }
3707
3708         kioc->done(kioc);
3709
3710         return;
3711 }
3712
3713
3714 /**
3715  * gather_hbainfo - HBA characteristics for the applications
3716  * @adapter             : HBA soft state
3717  * @hinfo               : pointer to the caller's host info strucuture
3718  */
3719 static int
3720 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3721 {
3722         hinfo->pci_vendor_id    = adapter->pdev->vendor;
3723         hinfo->pci_device_id    = adapter->pdev->device;
3724         hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3725         hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3726
3727         hinfo->pci_bus          = adapter->pdev->bus->number;
3728         hinfo->pci_dev_fn       = adapter->pdev->devfn;
3729         hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3730         hinfo->irq              = adapter->host->irq;
3731         hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3732
3733         hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3734         hinfo->host_no          = adapter->host->host_no;
3735
3736         return 0;
3737 }
3738
3739 /*
3740  * END: Interface for the common management module
3741  */
3742
3743
3744
3745 /**
3746  * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3747  * @adapter     : controller's soft state
3748  *
3749  * Allocate packets required to issue FW calls whenever the sysfs attributes
3750  * are read. These attributes would require up-to-date information from the
3751  * FW. Also set up resources for mutual exclusion to share these resources and
3752  * the wait queue.
3753  *
3754  * Return 0 on success.
3755  * Return -ERROR_CODE on failure.
3756  */
3757 static int
3758 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3759 {
3760         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3761         int             rval = 0;
3762
3763         raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3764
3765         raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3766
3767         raid_dev->sysfs_buffer = dma_alloc_coherent(&adapter->pdev->dev,
3768                         PAGE_SIZE, &raid_dev->sysfs_buffer_dma, GFP_KERNEL);
3769
3770         if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3771                 !raid_dev->sysfs_buffer) {
3772
3773                 con_log(CL_ANN, (KERN_WARNING
3774                         "megaraid: out of memory, %s %d\n", __func__,
3775                         __LINE__));
3776
3777                 rval = -ENOMEM;
3778
3779                 megaraid_sysfs_free_resources(adapter);
3780         }
3781
3782         mutex_init(&raid_dev->sysfs_mtx);
3783
3784         init_waitqueue_head(&raid_dev->sysfs_wait_q);
3785
3786         return rval;
3787 }
3788
3789
3790 /**
3791  * megaraid_sysfs_free_resources - free sysfs related resources
3792  * @adapter     : controller's soft state
3793  *
3794  * Free packets allocated for sysfs FW commands
3795  */
3796 static void
3797 megaraid_sysfs_free_resources(adapter_t *adapter)
3798 {
3799         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3800
3801         kfree(raid_dev->sysfs_uioc);
3802         kfree(raid_dev->sysfs_mbox64);
3803
3804         if (raid_dev->sysfs_buffer) {
3805                 dma_free_coherent(&adapter->pdev->dev, PAGE_SIZE,
3806                         raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3807         }
3808 }
3809
3810
3811 /**
3812  * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3813  * @uioc        : completed packet
3814  *
3815  * Callback routine called in the ISR/tasklet context for get ldmap call
3816  */
3817 static void
3818 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3819 {
3820         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3821         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3822
3823         uioc->status = 0;
3824
3825         wake_up(&raid_dev->sysfs_wait_q);
3826 }
3827
3828 /**
3829  * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3830  * @t   : timed out timer
3831  *
3832  * Timeout routine to recover and return to application, in case the adapter
3833  * has stopped responding. A timeout of 60 seconds for this command seems like
3834  * a good value.
3835  */
3836 static void
3837 megaraid_sysfs_get_ldmap_timeout(struct timer_list *t)
3838 {
3839         struct uioc_timeout *timeout = from_timer(timeout, t, timer);
3840         uioc_t          *uioc = timeout->uioc;
3841         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3842         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3843
3844         uioc->status = -ETIME;
3845
3846         wake_up(&raid_dev->sysfs_wait_q);
3847 }
3848
3849
3850 /**
3851  * megaraid_sysfs_get_ldmap - get update logical drive map
3852  * @adapter     : controller's soft state
3853  *
3854  * This routine will be called whenever user reads the logical drive
3855  * attributes, go get the current logical drive mapping table from the
3856  * firmware. We use the management API's to issue commands to the controller.
3857  *
3858  * NOTE: The commands issuance functionality is not generalized and
3859  * implemented in context of "get ld map" command only. If required, the
3860  * command issuance logical can be trivially pulled out and implemented as a
3861  * standalone library. For now, this should suffice since there is no other
3862  * user of this interface.
3863  *
3864  * Return 0 on success.
3865  * Return -1 on failure.
3866  */
3867 static int
3868 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3869 {
3870         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3871         uioc_t                  *uioc;
3872         mbox64_t                *mbox64;
3873         mbox_t                  *mbox;
3874         char                    *raw_mbox;
3875         struct uioc_timeout     timeout;
3876         caddr_t                 ldmap;
3877         int                     rval = 0;
3878
3879         /*
3880          * Allow only one read at a time to go through the sysfs attributes
3881          */
3882         mutex_lock(&raid_dev->sysfs_mtx);
3883
3884         uioc    = raid_dev->sysfs_uioc;
3885         mbox64  = raid_dev->sysfs_mbox64;
3886         ldmap   = raid_dev->sysfs_buffer;
3887
3888         memset(uioc, 0, sizeof(uioc_t));
3889         memset(mbox64, 0, sizeof(mbox64_t));
3890         memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3891
3892         mbox            = &mbox64->mbox32;
3893         raw_mbox        = (char *)mbox;
3894         uioc->cmdbuf    = (uint64_t)(unsigned long)mbox64;
3895         uioc->buf_vaddr = (caddr_t)adapter;
3896         uioc->status    = -ENODATA;
3897         uioc->done      = megaraid_sysfs_get_ldmap_done;
3898
3899         /*
3900          * Prepare the mailbox packet to get the current logical drive mapping
3901          * table
3902          */
3903         mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
3904
3905         raw_mbox[0] = FC_DEL_LOGDRV;
3906         raw_mbox[2] = OP_GET_LDID_MAP;
3907
3908         /*
3909          * Setup a timer to recover from a non-responding controller
3910          */
3911         timeout.uioc = uioc;
3912         timer_setup_on_stack(&timeout.timer,
3913                              megaraid_sysfs_get_ldmap_timeout, 0);
3914
3915         timeout.timer.expires           = jiffies + 60 * HZ;
3916         add_timer(&timeout.timer);
3917
3918         /*
3919          * Send the command to the firmware
3920          */
3921         rval = megaraid_mbox_mm_command(adapter, uioc);
3922
3923         if (rval == 0) {        // command successfully issued
3924                 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
3925
3926                 /*
3927                  * Check if the command timed out
3928                  */
3929                 if (uioc->status == -ETIME) {
3930                         con_log(CL_ANN, (KERN_NOTICE
3931                                 "megaraid: sysfs get ld map timed out\n"));
3932
3933                         rval = -ETIME;
3934                 }
3935                 else {
3936                         rval = mbox->status;
3937                 }
3938
3939                 if (rval == 0) {
3940                         memcpy(raid_dev->curr_ldmap, ldmap,
3941                                 sizeof(raid_dev->curr_ldmap));
3942                 }
3943                 else {
3944                         con_log(CL_ANN, (KERN_NOTICE
3945                                 "megaraid: get ld map failed with %x\n", rval));
3946                 }
3947         }
3948         else {
3949                 con_log(CL_ANN, (KERN_NOTICE
3950                         "megaraid: could not issue ldmap command:%x\n", rval));
3951         }
3952
3953
3954         del_timer_sync(&timeout.timer);
3955         destroy_timer_on_stack(&timeout.timer);
3956
3957         mutex_unlock(&raid_dev->sysfs_mtx);
3958
3959         return rval;
3960 }
3961
3962
3963 /**
3964  * megaraid_mbox_app_hndl_show - display application handle for this adapter
3965  * @dev         : class device object representation for the host
3966  * @attr        : device attribute (unused)
3967  * @buf         : buffer to send data to
3968  *
3969  * Display the handle used by the applications while executing management
3970  * tasks on the adapter. We invoke a management module API to get the adapter
3971  * handle, since we do not interface with applications directly.
3972  */
3973 static ssize_t
3974 megaraid_mbox_app_hndl_show(struct device *dev, struct device_attribute *attr, char *buf)
3975 {
3976         struct Scsi_Host *shost = class_to_shost(dev);
3977         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
3978         uint32_t        app_hndl;
3979
3980         app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
3981
3982         return sysfs_emit(buf, "%u\n", app_hndl);
3983 }
3984
3985
3986 /**
3987  * megaraid_mbox_ld_show - display the logical drive number for this device
3988  * @dev         : device object representation for the scsi device
3989  * @attr        : device attribute to show
3990  * @buf         : buffer to send data to
3991  *
3992  * Display the logical drive number for the device in question, if it a valid
3993  * logical drive. For physical devices, "-1" is returned.
3994  *
3995  * The logical drive number is displayed in following format:
3996  *
3997  * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
3998  *
3999  *   <int>     <int>       <int>            <int>
4000  */
4001 static ssize_t
4002 megaraid_mbox_ld_show(struct device *dev, struct device_attribute *attr, char *buf)
4003 {
4004         struct scsi_device *sdev = to_scsi_device(dev);
4005         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4006         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4007         int             scsi_id = -1;
4008         int             logical_drv = -1;
4009         int             ldid_map = -1;
4010         uint32_t        app_hndl = 0;
4011         int             mapped_sdev_id;
4012         int             rval;
4013         int             i;
4014
4015         if (raid_dev->random_del_supported &&
4016                         MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4017
4018                 rval = megaraid_sysfs_get_ldmap(adapter);
4019                 if (rval == 0) {
4020
4021                         for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4022
4023                                 mapped_sdev_id = sdev->id;
4024
4025                                 if (sdev->id > adapter->init_id) {
4026                                         mapped_sdev_id -= 1;
4027                                 }
4028
4029                                 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4030
4031                                         scsi_id = sdev->id;
4032
4033                                         logical_drv = i;
4034
4035                                         ldid_map = raid_dev->curr_ldmap[i];
4036
4037                                         app_hndl = mraid_mm_adapter_app_handle(
4038                                                         adapter->unique_id);
4039
4040                                         break;
4041                                 }
4042                         }
4043                 }
4044                 else {
4045                         con_log(CL_ANN, (KERN_NOTICE
4046                                 "megaraid: sysfs get ld map failed: %x\n",
4047                                 rval));
4048                 }
4049         }
4050
4051         return sysfs_emit(buf, "%d %d %d %d\n", scsi_id, logical_drv,
4052                         ldid_map, app_hndl);
4053 }
4054
4055
4056 /*
4057  * END: Mailbox Low Level Driver
4058  */
4059 module_init(megaraid_init);
4060 module_exit(megaraid_exit);