drivers/scsi/smartpqi/smartpqi_init.c

   1 /*
   2  *    driver for Microsemi PQI-based storage controllers
   3  *    Copyright (c) 2016-2017 Microsemi Corporation
   4  *    Copyright (c) 2016 PMC-Sierra, Inc.
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; version 2 of the License.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  14  *
  15  *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
  16  *
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/pci.h>
  22 #include <linux/delay.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/sched.h>
  25 #include <linux/rtc.h>
  26 #include <linux/bcd.h>
  27 #include <linux/reboot.h>
  28 #include <linux/cciss_ioctl.h>
  29 #include <linux/blk-mq-pci.h>
  30 #include <scsi/scsi_host.h>
  31 #include <scsi/scsi_cmnd.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_transport_sas.h>
  35 #include <asm/unaligned.h>
  36 #include "smartpqi.h"
  37 #include "smartpqi_sis.h"
  38
  39 #if !defined(BUILD_TIMESTAMP)
  40 #define BUILD_TIMESTAMP
  41 #endif
  42
  43 #define DRIVER_VERSION          "1.1.4-115"
  44 #define DRIVER_MAJOR            1
  45 #define DRIVER_MINOR            1
  46 #define DRIVER_RELEASE          4
  47 #define DRIVER_REVISION         115
  48
  49 #define DRIVER_NAME             "Microsemi PQI Driver (v" \
  50                                 DRIVER_VERSION BUILD_TIMESTAMP ")"
  51 #define DRIVER_NAME_SHORT       "smartpqi"
  52
  53 #define PQI_EXTRA_SGL_MEMORY    (12 * sizeof(struct pqi_sg_descriptor))
  54
  55 MODULE_AUTHOR("Microsemi");
  56 MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
  57         DRIVER_VERSION);
  58 MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
  59 MODULE_VERSION(DRIVER_VERSION);
  60 MODULE_LICENSE("GPL");
  61
  62 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
  63 static void pqi_ctrl_offline_worker(struct work_struct *work);
  64 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info);
  65 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  66 static void pqi_scan_start(struct Scsi_Host *shost);
  67 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  68         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  69         struct pqi_io_request *io_request);
  70 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  71         struct pqi_iu_header *request, unsigned int flags,
  72         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs);
  73 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  74         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  75         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  76         struct pqi_encryption_info *encryption_info, bool raid_bypass);
  77
  78 /* for flags argument to pqi_submit_raid_request_synchronous() */
  79 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
  80
  81 static struct scsi_transport_template *pqi_sas_transport_template;
  82
  83 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  84
  85 enum pqi_lockup_action {
  86         NONE,
  87         REBOOT,
  88         PANIC
  89 };
  90
  91 static enum pqi_lockup_action pqi_lockup_action = NONE;
  92
  93 static struct {
  94         enum pqi_lockup_action  action;
  95         char                    *name;
  96 } pqi_lockup_actions[] = {
  97         {
  98                 .action = NONE,
  99                 .name = "none",
 100         },
 101         {
 102                 .action = REBOOT,
 103                 .name = "reboot",
 104         },
 105         {
 106                 .action = PANIC,
 107                 .name = "panic",
 108         },
 109 };
 110
 111 static unsigned int pqi_supported_event_types[] = {
 112         PQI_EVENT_TYPE_HOTPLUG,
 113         PQI_EVENT_TYPE_HARDWARE,
 114         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 115         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 116         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 117         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 118 };
 119
 120 static int pqi_disable_device_id_wildcards;
 121 module_param_named(disable_device_id_wildcards,
 122         pqi_disable_device_id_wildcards, int, 0644);
 123 MODULE_PARM_DESC(disable_device_id_wildcards,
 124         "Disable device ID wildcards.");
 125
 126 static int pqi_disable_heartbeat;
 127 module_param_named(disable_heartbeat,
 128         pqi_disable_heartbeat, int, 0644);
 129 MODULE_PARM_DESC(disable_heartbeat,
 130         "Disable heartbeat.");
 131
 132 static int pqi_disable_ctrl_shutdown;
 133 module_param_named(disable_ctrl_shutdown,
 134         pqi_disable_ctrl_shutdown, int, 0644);
 135 MODULE_PARM_DESC(disable_ctrl_shutdown,
 136         "Disable controller shutdown when controller locked up.");
 137
 138 static char *pqi_lockup_action_param;
 139 module_param_named(lockup_action,
 140         pqi_lockup_action_param, charp, 0644);
 141 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 142         "\t\tSupported: none, reboot, panic\n"
 143         "\t\tDefault: none");
 144
 145 static char *raid_levels[] = {
 146         "RAID-0",
 147         "RAID-4",
 148         "RAID-1(1+0)",
 149         "RAID-5",
 150         "RAID-5+1",
 151         "RAID-ADG",
 152         "RAID-1(ADM)",
 153 };
 154
 155 static char *pqi_raid_level_to_string(u8 raid_level)
 156 {
 157         if (raid_level < ARRAY_SIZE(raid_levels))
 158                 return raid_levels[raid_level];
 159
 160         return "RAID UNKNOWN";
 161 }
 162
 163 #define SA_RAID_0               0
 164 #define SA_RAID_4               1
 165 #define SA_RAID_1               2       /* also used for RAID 10 */
 166 #define SA_RAID_5               3       /* also used for RAID 50 */
 167 #define SA_RAID_51              4
 168 #define SA_RAID_6               5       /* also used for RAID 60 */
 169 #define SA_RAID_ADM             6       /* also used for RAID 1+0 ADM */
 170 #define SA_RAID_MAX             SA_RAID_ADM
 171 #define SA_RAID_UNKNOWN         0xff
 172
 173 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 174 {
 175         pqi_prep_for_scsi_done(scmd);
 176         scmd->scsi_done(scmd);
 177 }
 178
 179 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 180 {
 181         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 182 }
 183
 184 static inline struct pqi_ctrl_info *shost_to_hba(struct Scsi_Host *shost)
 185 {
 186         void *hostdata = shost_priv(shost);
 187
 188         return *((struct pqi_ctrl_info **)hostdata);
 189 }
 190
 191 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 192 {
 193         return !device->is_physical_device;
 194 }
 195
 196 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 197 {
 198         return scsi3addr[2] != 0;
 199 }
 200
 201 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 202 {
 203         return !ctrl_info->controller_online;
 204 }
 205
 206 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 207 {
 208         if (ctrl_info->controller_online)
 209                 if (!sis_is_firmware_running(ctrl_info))
 210                         pqi_take_ctrl_offline(ctrl_info);
 211 }
 212
 213 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 214 {
 215         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 216 }
 217
 218 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(
 219         struct pqi_ctrl_info *ctrl_info)
 220 {
 221         return sis_read_driver_scratch(ctrl_info);
 222 }
 223
 224 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 225         enum pqi_ctrl_mode mode)
 226 {
 227         sis_write_driver_scratch(ctrl_info, mode);
 228 }
 229
 230 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 231 {
 232         ctrl_info->block_requests = true;
 233         scsi_block_requests(ctrl_info->scsi_host);
 234 }
 235
 236 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 237 {
 238         ctrl_info->block_requests = false;
 239         wake_up_all(&ctrl_info->block_requests_wait);
 240         pqi_retry_raid_bypass_requests(ctrl_info);
 241         scsi_unblock_requests(ctrl_info->scsi_host);
 242 }
 243
 244 static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 245 {
 246         return ctrl_info->block_requests;
 247 }
 248
 249 static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info,
 250         unsigned long timeout_msecs)
 251 {
 252         unsigned long remaining_msecs;
 253
 254         if (!pqi_ctrl_blocked(ctrl_info))
 255                 return timeout_msecs;
 256
 257         atomic_inc(&ctrl_info->num_blocked_threads);
 258
 259         if (timeout_msecs == NO_TIMEOUT) {
 260                 wait_event(ctrl_info->block_requests_wait,
 261                         !pqi_ctrl_blocked(ctrl_info));
 262                 remaining_msecs = timeout_msecs;
 263         } else {
 264                 unsigned long remaining_jiffies;
 265
 266                 remaining_jiffies =
 267                         wait_event_timeout(ctrl_info->block_requests_wait,
 268                                 !pqi_ctrl_blocked(ctrl_info),
 269                                 msecs_to_jiffies(timeout_msecs));
 270                 remaining_msecs = jiffies_to_msecs(remaining_jiffies);
 271         }
 272
 273         atomic_dec(&ctrl_info->num_blocked_threads);
 274
 275         return remaining_msecs;
 276 }
 277
 278 static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
 279 {
 280         atomic_inc(&ctrl_info->num_busy_threads);
 281 }
 282
 283 static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
 284 {
 285         atomic_dec(&ctrl_info->num_busy_threads);
 286 }
 287
 288 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 289 {
 290         while (atomic_read(&ctrl_info->num_busy_threads) >
 291                 atomic_read(&ctrl_info->num_blocked_threads))
 292                 usleep_range(1000, 2000);
 293 }
 294
 295 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 296 {
 297         return device->device_offline;
 298 }
 299
 300 static inline void pqi_device_reset_start(struct pqi_scsi_dev *device)
 301 {
 302         device->in_reset = true;
 303 }
 304
 305 static inline void pqi_device_reset_done(struct pqi_scsi_dev *device)
 306 {
 307         device->in_reset = false;
 308 }
 309
 310 static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device)
 311 {
 312         return device->in_reset;
 313 }
 314
 315 static inline void pqi_schedule_rescan_worker_with_delay(
 316         struct pqi_ctrl_info *ctrl_info, unsigned long delay)
 317 {
 318         if (pqi_ctrl_offline(ctrl_info))
 319                 return;
 320
 321         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 322 }
 323
 324 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 325 {
 326         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 327 }
 328
 329 #define PQI_RESCAN_WORK_DELAY  (10 * HZ)
 330
 331 static inline void pqi_schedule_rescan_worker_delayed(
 332         struct pqi_ctrl_info *ctrl_info)
 333 {
 334         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 335 }
 336
 337 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 338 {
 339         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 340 }
 341
 342 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 343 {
 344         if (!ctrl_info->heartbeat_counter)
 345                 return 0;
 346
 347         return readl(ctrl_info->heartbeat_counter);
 348 }
 349
 350 static int pqi_map_single(struct pci_dev *pci_dev,
 351         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 352         size_t buffer_length, int data_direction)
 353 {
 354         dma_addr_t bus_address;
 355
 356         if (!buffer || buffer_length == 0 || data_direction == PCI_DMA_NONE)
 357                 return 0;
 358
 359         bus_address = pci_map_single(pci_dev, buffer, buffer_length,
 360                 data_direction);
 361         if (pci_dma_mapping_error(pci_dev, bus_address))
 362                 return -ENOMEM;
 363
 364         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 365         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 366         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 367
 368         return 0;
 369 }
 370
 371 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 372         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 373         int data_direction)
 374 {
 375         int i;
 376
 377         if (data_direction == PCI_DMA_NONE)
 378                 return;
 379
 380         for (i = 0; i < num_descriptors; i++)
 381                 pci_unmap_single(pci_dev,
 382                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 383                         get_unaligned_le32(&descriptors[i].length),
 384                         data_direction);
 385 }
 386
 387 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 388         struct pqi_raid_path_request *request, u8 cmd,
 389         u8 *scsi3addr, void *buffer, size_t buffer_length,
 390         u16 vpd_page, int *pci_direction)
 391 {
 392         u8 *cdb;
 393         int pci_dir;
 394
 395         memset(request, 0, sizeof(*request));
 396
 397         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 398         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 399                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 400                 &request->header.iu_length);
 401         put_unaligned_le32(buffer_length, &request->buffer_length);
 402         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 403         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 404         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 405
 406         cdb = request->cdb;
 407
 408         switch (cmd) {
 409         case INQUIRY:
 410                 request->data_direction = SOP_READ_FLAG;
 411                 cdb[0] = INQUIRY;
 412                 if (vpd_page & VPD_PAGE) {
 413                         cdb[1] = 0x1;
 414                         cdb[2] = (u8)vpd_page;
 415                 }
 416                 cdb[4] = (u8)buffer_length;
 417                 break;
 418         case CISS_REPORT_LOG:
 419         case CISS_REPORT_PHYS:
 420                 request->data_direction = SOP_READ_FLAG;
 421                 cdb[0] = cmd;
 422                 if (cmd == CISS_REPORT_PHYS)
 423                         cdb[1] = CISS_REPORT_PHYS_EXTENDED;
 424                 else
 425                         cdb[1] = CISS_REPORT_LOG_EXTENDED;
 426                 put_unaligned_be32(buffer_length, &cdb[6]);
 427                 break;
 428         case CISS_GET_RAID_MAP:
 429                 request->data_direction = SOP_READ_FLAG;
 430                 cdb[0] = CISS_READ;
 431                 cdb[1] = CISS_GET_RAID_MAP;
 432                 put_unaligned_be32(buffer_length, &cdb[6]);
 433                 break;
 434         case SA_FLUSH_CACHE:
 435                 request->data_direction = SOP_WRITE_FLAG;
 436                 cdb[0] = BMIC_WRITE;
 437                 cdb[6] = BMIC_FLUSH_CACHE;
 438                 put_unaligned_be16(buffer_length, &cdb[7]);
 439                 break;
 440         case BMIC_IDENTIFY_CONTROLLER:
 441         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 442                 request->data_direction = SOP_READ_FLAG;
 443                 cdb[0] = BMIC_READ;
 444                 cdb[6] = cmd;
 445                 put_unaligned_be16(buffer_length, &cdb[7]);
 446                 break;
 447         case BMIC_WRITE_HOST_WELLNESS:
 448                 request->data_direction = SOP_WRITE_FLAG;
 449                 cdb[0] = BMIC_WRITE;
 450                 cdb[6] = cmd;
 451                 put_unaligned_be16(buffer_length, &cdb[7]);
 452                 break;
 453         default:
 454                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n",
 455                         cmd);
 456                 break;
 457         }
 458
 459         switch (request->data_direction) {
 460         case SOP_READ_FLAG:
 461                 pci_dir = PCI_DMA_FROMDEVICE;
 462                 break;
 463         case SOP_WRITE_FLAG:
 464                 pci_dir = PCI_DMA_TODEVICE;
 465                 break;
 466         case SOP_NO_DIRECTION_FLAG:
 467                 pci_dir = PCI_DMA_NONE;
 468                 break;
 469         default:
 470                 pci_dir = PCI_DMA_BIDIRECTIONAL;
 471                 break;
 472         }
 473
 474         *pci_direction = pci_dir;
 475
 476         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 477                 buffer, buffer_length, pci_dir);
 478 }
 479
 480 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 481 {
 482         io_request->scmd = NULL;
 483         io_request->status = 0;
 484         io_request->error_info = NULL;
 485         io_request->raid_bypass = false;
 486 }
 487
 488 static struct pqi_io_request *pqi_alloc_io_request(
 489         struct pqi_ctrl_info *ctrl_info)
 490 {
 491         struct pqi_io_request *io_request;
 492         u16 i = ctrl_info->next_io_request_slot;        /* benignly racy */
 493
 494         while (1) {
 495                 io_request = &ctrl_info->io_request_pool[i];
 496                 if (atomic_inc_return(&io_request->refcount) == 1)
 497                         break;
 498                 atomic_dec(&io_request->refcount);
 499                 i = (i + 1) % ctrl_info->max_io_slots;
 500         }
 501
 502         /* benignly racy */
 503         ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 504
 505         pqi_reinit_io_request(io_request);
 506
 507         return io_request;
 508 }
 509
 510 static void pqi_free_io_request(struct pqi_io_request *io_request)
 511 {
 512         atomic_dec(&io_request->refcount);
 513 }
 514
 515 static int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 516         struct bmic_identify_controller *buffer)
 517 {
 518         int rc;
 519         int pci_direction;
 520         struct pqi_raid_path_request request;
 521
 522         rc = pqi_build_raid_path_request(ctrl_info, &request,
 523                 BMIC_IDENTIFY_CONTROLLER, RAID_CTLR_LUNID, buffer,
 524                 sizeof(*buffer), 0, &pci_direction);
 525         if (rc)
 526                 return rc;
 527
 528         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 529                 NULL, NO_TIMEOUT);
 530
 531         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 532                 pci_direction);
 533
 534         return rc;
 535 }
 536
 537 static int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 538         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 539 {
 540         int rc;
 541         int pci_direction;
 542         struct pqi_raid_path_request request;
 543
 544         rc = pqi_build_raid_path_request(ctrl_info, &request,
 545                 INQUIRY, scsi3addr, buffer, buffer_length, vpd_page,
 546                 &pci_direction);
 547         if (rc)
 548                 return rc;
 549
 550         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 551                 NULL, NO_TIMEOUT);
 552
 553         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 554                 pci_direction);
 555
 556         return rc;
 557 }
 558
 559 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 560         struct pqi_scsi_dev *device,
 561         struct bmic_identify_physical_device *buffer,
 562         size_t buffer_length)
 563 {
 564         int rc;
 565         int pci_direction;
 566         u16 bmic_device_index;
 567         struct pqi_raid_path_request request;
 568
 569         rc = pqi_build_raid_path_request(ctrl_info, &request,
 570                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 571                 buffer_length, 0, &pci_direction);
 572         if (rc)
 573                 return rc;
 574
 575         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 576         request.cdb[2] = (u8)bmic_device_index;
 577         request.cdb[9] = (u8)(bmic_device_index >> 8);
 578
 579         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 580                 0, NULL, NO_TIMEOUT);
 581
 582         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 583                 pci_direction);
 584
 585         return rc;
 586 }
 587
 588 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 589         enum bmic_flush_cache_shutdown_event shutdown_event)
 590 {
 591         int rc;
 592         struct pqi_raid_path_request request;
 593         int pci_direction;
 594         struct bmic_flush_cache *flush_cache;
 595
 596         /*
 597          * Don't bother trying to flush the cache if the controller is
 598          * locked up.
 599          */
 600         if (pqi_ctrl_offline(ctrl_info))
 601                 return -ENXIO;
 602
 603         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 604         if (!flush_cache)
 605                 return -ENOMEM;
 606
 607         flush_cache->shutdown_event = shutdown_event;
 608
 609         rc = pqi_build_raid_path_request(ctrl_info, &request,
 610                 SA_FLUSH_CACHE, RAID_CTLR_LUNID, flush_cache,
 611                 sizeof(*flush_cache), 0, &pci_direction);
 612         if (rc)
 613                 goto out;
 614
 615         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 616                 0, NULL, NO_TIMEOUT);
 617
 618         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 619                 pci_direction);
 620
 621 out:
 622         kfree(flush_cache);
 623
 624         return rc;
 625 }
 626
 627 static int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 628         void *buffer, size_t buffer_length)
 629 {
 630         int rc;
 631         struct pqi_raid_path_request request;
 632         int pci_direction;
 633
 634         rc = pqi_build_raid_path_request(ctrl_info, &request,
 635                 BMIC_WRITE_HOST_WELLNESS, RAID_CTLR_LUNID, buffer,
 636                 buffer_length, 0, &pci_direction);
 637         if (rc)
 638                 return rc;
 639
 640         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 641                 0, NULL, NO_TIMEOUT);
 642
 643         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 644                 pci_direction);
 645
 646         return rc;
 647 }
 648
 649 #pragma pack(1)
 650
 651 struct bmic_host_wellness_driver_version {
 652         u8      start_tag[4];
 653         u8      driver_version_tag[2];
 654         __le16  driver_version_length;
 655         char    driver_version[32];
 656         u8      end_tag[2];
 657 };
 658
 659 #pragma pack()
 660
 661 static int pqi_write_driver_version_to_host_wellness(
 662         struct pqi_ctrl_info *ctrl_info)
 663 {
 664         int rc;
 665         struct bmic_host_wellness_driver_version *buffer;
 666         size_t buffer_length;
 667
 668         buffer_length = sizeof(*buffer);
 669
 670         buffer = kmalloc(buffer_length, GFP_KERNEL);
 671         if (!buffer)
 672                 return -ENOMEM;
 673
 674         buffer->start_tag[0] = '<';
 675         buffer->start_tag[1] = 'H';
 676         buffer->start_tag[2] = 'W';
 677         buffer->start_tag[3] = '>';
 678         buffer->driver_version_tag[0] = 'D';
 679         buffer->driver_version_tag[1] = 'V';
 680         put_unaligned_le16(sizeof(buffer->driver_version),
 681                 &buffer->driver_version_length);
 682         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 683                 sizeof(buffer->driver_version) - 1);
 684         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 685         buffer->end_tag[0] = 'Z';
 686         buffer->end_tag[1] = 'Z';
 687
 688         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 689
 690         kfree(buffer);
 691
 692         return rc;
 693 }
 694
 695 #pragma pack(1)
 696
 697 struct bmic_host_wellness_time {
 698         u8      start_tag[4];
 699         u8      time_tag[2];
 700         __le16  time_length;
 701         u8      time[8];
 702         u8      dont_write_tag[2];
 703         u8      end_tag[2];
 704 };
 705
 706 #pragma pack()
 707
 708 static int pqi_write_current_time_to_host_wellness(
 709         struct pqi_ctrl_info *ctrl_info)
 710 {
 711         int rc;
 712         struct bmic_host_wellness_time *buffer;
 713         size_t buffer_length;
 714         time64_t local_time;
 715         unsigned int year;
 716         struct tm tm;
 717
 718         buffer_length = sizeof(*buffer);
 719
 720         buffer = kmalloc(buffer_length, GFP_KERNEL);
 721         if (!buffer)
 722                 return -ENOMEM;
 723
 724         buffer->start_tag[0] = '<';
 725         buffer->start_tag[1] = 'H';
 726         buffer->start_tag[2] = 'W';
 727         buffer->start_tag[3] = '>';
 728         buffer->time_tag[0] = 'T';
 729         buffer->time_tag[1] = 'D';
 730         put_unaligned_le16(sizeof(buffer->time),
 731                 &buffer->time_length);
 732
 733         local_time = ktime_get_real_seconds();
 734         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
 735         year = tm.tm_year + 1900;
 736
 737         buffer->time[0] = bin2bcd(tm.tm_hour);
 738         buffer->time[1] = bin2bcd(tm.tm_min);
 739         buffer->time[2] = bin2bcd(tm.tm_sec);
 740         buffer->time[3] = 0;
 741         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
 742         buffer->time[5] = bin2bcd(tm.tm_mday);
 743         buffer->time[6] = bin2bcd(year / 100);
 744         buffer->time[7] = bin2bcd(year % 100);
 745
 746         buffer->dont_write_tag[0] = 'D';
 747         buffer->dont_write_tag[1] = 'W';
 748         buffer->end_tag[0] = 'Z';
 749         buffer->end_tag[1] = 'Z';
 750
 751         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 752
 753         kfree(buffer);
 754
 755         return rc;
 756 }
 757
 758 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * HZ)
 759
 760 static void pqi_update_time_worker(struct work_struct *work)
 761 {
 762         int rc;
 763         struct pqi_ctrl_info *ctrl_info;
 764
 765         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
 766                 update_time_work);
 767
 768         if (pqi_ctrl_offline(ctrl_info))
 769                 return;
 770
 771         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
 772         if (rc)
 773                 dev_warn(&ctrl_info->pci_dev->dev,
 774                         "error updating time on controller\n");
 775
 776         schedule_delayed_work(&ctrl_info->update_time_work,
 777                 PQI_UPDATE_TIME_WORK_INTERVAL);
 778 }
 779
 780 static inline void pqi_schedule_update_time_worker(
 781         struct pqi_ctrl_info *ctrl_info)
 782 {
 783         schedule_delayed_work(&ctrl_info->update_time_work, 0);
 784 }
 785
 786 static inline void pqi_cancel_update_time_worker(
 787         struct pqi_ctrl_info *ctrl_info)
 788 {
 789         cancel_delayed_work_sync(&ctrl_info->update_time_work);
 790 }
 791
 792 static int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 793         void *buffer, size_t buffer_length)
 794 {
 795         int rc;
 796         int pci_direction;
 797         struct pqi_raid_path_request request;
 798
 799         rc = pqi_build_raid_path_request(ctrl_info, &request,
 800                 cmd, RAID_CTLR_LUNID, buffer, buffer_length, 0, &pci_direction);
 801         if (rc)
 802                 return rc;
 803
 804         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 805                 NULL, NO_TIMEOUT);
 806
 807         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 808                 pci_direction);
 809
 810         return rc;
 811 }
 812
 813 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 814         void **buffer)
 815 {
 816         int rc;
 817         size_t lun_list_length;
 818         size_t lun_data_length;
 819         size_t new_lun_list_length;
 820         void *lun_data = NULL;
 821         struct report_lun_header *report_lun_header;
 822
 823         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
 824         if (!report_lun_header) {
 825                 rc = -ENOMEM;
 826                 goto out;
 827         }
 828
 829         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
 830                 sizeof(*report_lun_header));
 831         if (rc)
 832                 goto out;
 833
 834         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
 835
 836 again:
 837         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
 838
 839         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
 840         if (!lun_data) {
 841                 rc = -ENOMEM;
 842                 goto out;
 843         }
 844
 845         if (lun_list_length == 0) {
 846                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
 847                 goto out;
 848         }
 849
 850         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
 851         if (rc)
 852                 goto out;
 853
 854         new_lun_list_length = get_unaligned_be32(
 855                 &((struct report_lun_header *)lun_data)->list_length);
 856
 857         if (new_lun_list_length > lun_list_length) {
 858                 lun_list_length = new_lun_list_length;
 859                 kfree(lun_data);
 860                 goto again;
 861         }
 862
 863 out:
 864         kfree(report_lun_header);
 865
 866         if (rc) {
 867                 kfree(lun_data);
 868                 lun_data = NULL;
 869         }
 870
 871         *buffer = lun_data;
 872
 873         return rc;
 874 }
 875
 876 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
 877         void **buffer)
 878 {
 879         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
 880                 buffer);
 881 }
 882
 883 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
 884         void **buffer)
 885 {
 886         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
 887 }
 888
 889 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
 890         struct report_phys_lun_extended **physdev_list,
 891         struct report_log_lun_extended **logdev_list)
 892 {
 893         int rc;
 894         size_t logdev_list_length;
 895         size_t logdev_data_length;
 896         struct report_log_lun_extended *internal_logdev_list;
 897         struct report_log_lun_extended *logdev_data;
 898         struct report_lun_header report_lun_header;
 899
 900         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
 901         if (rc)
 902                 dev_err(&ctrl_info->pci_dev->dev,
 903                         "report physical LUNs failed\n");
 904
 905         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
 906         if (rc)
 907                 dev_err(&ctrl_info->pci_dev->dev,
 908                         "report logical LUNs failed\n");
 909
 910         /*
 911          * Tack the controller itself onto the end of the logical device list.
 912          */
 913
 914         logdev_data = *logdev_list;
 915
 916         if (logdev_data) {
 917                 logdev_list_length =
 918                         get_unaligned_be32(&logdev_data->header.list_length);
 919         } else {
 920                 memset(&report_lun_header, 0, sizeof(report_lun_header));
 921                 logdev_data =
 922                         (struct report_log_lun_extended *)&report_lun_header;
 923                 logdev_list_length = 0;
 924         }
 925
 926         logdev_data_length = sizeof(struct report_lun_header) +
 927                 logdev_list_length;
 928
 929         internal_logdev_list = kmalloc(logdev_data_length +
 930                 sizeof(struct report_log_lun_extended), GFP_KERNEL);
 931         if (!internal_logdev_list) {
 932                 kfree(*logdev_list);
 933                 *logdev_list = NULL;
 934                 return -ENOMEM;
 935         }
 936
 937         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
 938         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
 939                 sizeof(struct report_log_lun_extended_entry));
 940         put_unaligned_be32(logdev_list_length +
 941                 sizeof(struct report_log_lun_extended_entry),
 942                 &internal_logdev_list->header.list_length);
 943
 944         kfree(*logdev_list);
 945         *logdev_list = internal_logdev_list;
 946
 947         return 0;
 948 }
 949
 950 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
 951         int bus, int target, int lun)
 952 {
 953         device->bus = bus;
 954         device->target = target;
 955         device->lun = lun;
 956 }
 957
 958 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
 959 {
 960         u8 *scsi3addr;
 961         u32 lunid;
 962         int bus;
 963         int target;
 964         int lun;
 965
 966         scsi3addr = device->scsi3addr;
 967         lunid = get_unaligned_le32(scsi3addr);
 968
 969         if (pqi_is_hba_lunid(scsi3addr)) {
 970                 /* The specified device is the controller. */
 971                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
 972                 device->target_lun_valid = true;
 973                 return;
 974         }
 975
 976         if (pqi_is_logical_device(device)) {
 977                 if (device->is_external_raid_device) {
 978                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
 979                         target = (lunid >> 16) & 0x3fff;
 980                         lun = lunid & 0xff;
 981                 } else {
 982                         bus = PQI_RAID_VOLUME_BUS;
 983                         target = 0;
 984                         lun = lunid & 0x3fff;
 985                 }
 986                 pqi_set_bus_target_lun(device, bus, target, lun);
 987                 device->target_lun_valid = true;
 988                 return;
 989         }
 990
 991         /*
 992          * Defer target and LUN assignment for non-controller physical devices
 993          * because the SAS transport layer will make these assignments later.
 994          */
 995         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
 996 }
 997
 998 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
 999         struct pqi_scsi_dev *device)
1000 {
1001         int rc;
1002         u8 raid_level;
1003         u8 *buffer;
1004
1005         raid_level = SA_RAID_UNKNOWN;
1006
1007         buffer = kmalloc(64, GFP_KERNEL);
1008         if (buffer) {
1009                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1010                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1011                 if (rc == 0) {
1012                         raid_level = buffer[8];
1013                         if (raid_level > SA_RAID_MAX)
1014                                 raid_level = SA_RAID_UNKNOWN;
1015                 }
1016                 kfree(buffer);
1017         }
1018
1019         device->raid_level = raid_level;
1020 }
1021
1022 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1023         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1024 {
1025         char *err_msg;
1026         u32 raid_map_size;
1027         u32 r5or6_blocks_per_row;
1028         unsigned int num_phys_disks;
1029         unsigned int num_raid_map_entries;
1030
1031         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1032
1033         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1034                 err_msg = "RAID map too small";
1035                 goto bad_raid_map;
1036         }
1037
1038         if (raid_map_size > sizeof(*raid_map)) {
1039                 err_msg = "RAID map too large";
1040                 goto bad_raid_map;
1041         }
1042
1043         num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
1044                 (get_unaligned_le16(&raid_map->data_disks_per_row) +
1045                 get_unaligned_le16(&raid_map->metadata_disks_per_row));
1046         num_raid_map_entries = num_phys_disks *
1047                 get_unaligned_le16(&raid_map->row_cnt);
1048
1049         if (num_raid_map_entries > RAID_MAP_MAX_ENTRIES) {
1050                 err_msg = "invalid number of map entries in RAID map";
1051                 goto bad_raid_map;
1052         }
1053
1054         if (device->raid_level == SA_RAID_1) {
1055                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1056                         err_msg = "invalid RAID-1 map";
1057                         goto bad_raid_map;
1058                 }
1059         } else if (device->raid_level == SA_RAID_ADM) {
1060                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1061                         err_msg = "invalid RAID-1(ADM) map";
1062                         goto bad_raid_map;
1063                 }
1064         } else if ((device->raid_level == SA_RAID_5 ||
1065                 device->raid_level == SA_RAID_6) &&
1066                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1067                 /* RAID 50/60 */
1068                 r5or6_blocks_per_row =
1069                         get_unaligned_le16(&raid_map->strip_size) *
1070                         get_unaligned_le16(&raid_map->data_disks_per_row);
1071                 if (r5or6_blocks_per_row == 0) {
1072                         err_msg = "invalid RAID-5 or RAID-6 map";
1073                         goto bad_raid_map;
1074                 }
1075         }
1076
1077         return 0;
1078
1079 bad_raid_map:
1080         dev_warn(&ctrl_info->pci_dev->dev,
1081                 "logical device %08x%08x %s\n",
1082                 *((u32 *)&device->scsi3addr),
1083                 *((u32 *)&device->scsi3addr[4]), err_msg);
1084
1085         return -EINVAL;
1086 }
1087
1088 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1089         struct pqi_scsi_dev *device)
1090 {
1091         int rc;
1092         int pci_direction;
1093         struct pqi_raid_path_request request;
1094         struct raid_map *raid_map;
1095
1096         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1097         if (!raid_map)
1098                 return -ENOMEM;
1099
1100         rc = pqi_build_raid_path_request(ctrl_info, &request,
1101                 CISS_GET_RAID_MAP, device->scsi3addr, raid_map,
1102                 sizeof(*raid_map), 0, &pci_direction);
1103         if (rc)
1104                 goto error;
1105
1106         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
1107                 NULL, NO_TIMEOUT);
1108
1109         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
1110                 pci_direction);
1111
1112         if (rc)
1113                 goto error;
1114
1115         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1116         if (rc)
1117                 goto error;
1118
1119         device->raid_map = raid_map;
1120
1121         return 0;
1122
1123 error:
1124         kfree(raid_map);
1125
1126         return rc;
1127 }
1128
1129 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1130         struct pqi_scsi_dev *device)
1131 {
1132         int rc;
1133         u8 *buffer;
1134         u8 bypass_status;
1135
1136         buffer = kmalloc(64, GFP_KERNEL);
1137         if (!buffer)
1138                 return;
1139
1140         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1141                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1142         if (rc)
1143                 goto out;
1144
1145 #define RAID_BYPASS_STATUS      4
1146 #define RAID_BYPASS_CONFIGURED  0x1
1147 #define RAID_BYPASS_ENABLED     0x2
1148
1149         bypass_status = buffer[RAID_BYPASS_STATUS];
1150         device->raid_bypass_configured =
1151                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1152         if (device->raid_bypass_configured &&
1153                 (bypass_status & RAID_BYPASS_ENABLED) &&
1154                 pqi_get_raid_map(ctrl_info, device) == 0)
1155                 device->raid_bypass_enabled = true;
1156
1157 out:
1158         kfree(buffer);
1159 }
1160
1161 /*
1162  * Use vendor-specific VPD to determine online/offline status of a volume.
1163  */
1164
1165 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1166         struct pqi_scsi_dev *device)
1167 {
1168         int rc;
1169         size_t page_length;
1170         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1171         bool volume_offline = true;
1172         u32 volume_flags;
1173         struct ciss_vpd_logical_volume_status *vpd;
1174
1175         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1176         if (!vpd)
1177                 goto no_buffer;
1178
1179         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1180                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1181         if (rc)
1182                 goto out;
1183
1184         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1185                 volume_status) + vpd->page_length;
1186         if (page_length < sizeof(*vpd))
1187                 goto out;
1188
1189         volume_status = vpd->volume_status;
1190         volume_flags = get_unaligned_be32(&vpd->flags);
1191         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1192
1193 out:
1194         kfree(vpd);
1195 no_buffer:
1196         device->volume_status = volume_status;
1197         device->volume_offline = volume_offline;
1198 }
1199
1200 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1201         struct pqi_scsi_dev *device)
1202 {
1203         int rc;
1204         u8 *buffer;
1205
1206         buffer = kmalloc(64, GFP_KERNEL);
1207         if (!buffer)
1208                 return -ENOMEM;
1209
1210         /* Send an inquiry to the device to see what it is. */
1211         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1212         if (rc)
1213                 goto out;
1214
1215         scsi_sanitize_inquiry_string(&buffer[8], 8);
1216         scsi_sanitize_inquiry_string(&buffer[16], 16);
1217
1218         device->devtype = buffer[0] & 0x1f;
1219         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1220         memcpy(device->model, &buffer[16], sizeof(device->model));
1221
1222         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
1223                 if (device->is_external_raid_device) {
1224                         device->raid_level = SA_RAID_UNKNOWN;
1225                         device->volume_status = CISS_LV_OK;
1226                         device->volume_offline = false;
1227                 } else {
1228                         pqi_get_raid_level(ctrl_info, device);
1229                         pqi_get_raid_bypass_status(ctrl_info, device);
1230                         pqi_get_volume_status(ctrl_info, device);
1231                 }
1232         }
1233
1234 out:
1235         kfree(buffer);
1236
1237         return rc;
1238 }
1239
1240 static void pqi_get_physical_disk_info(struct pqi_ctrl_info *ctrl_info,
1241         struct pqi_scsi_dev *device,
1242         struct bmic_identify_physical_device *id_phys)
1243 {
1244         int rc;
1245
1246         memset(id_phys, 0, sizeof(*id_phys));
1247
1248         rc = pqi_identify_physical_device(ctrl_info, device,
1249                 id_phys, sizeof(*id_phys));
1250         if (rc) {
1251                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1252                 return;
1253         }
1254
1255         device->queue_depth =
1256                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1257         device->device_type = id_phys->device_type;
1258         device->active_path_index = id_phys->active_path_number;
1259         device->path_map = id_phys->redundant_path_present_map;
1260         memcpy(&device->box,
1261                 &id_phys->alternate_paths_phys_box_on_port,
1262                 sizeof(device->box));
1263         memcpy(&device->phys_connector,
1264                 &id_phys->alternate_paths_phys_connector,
1265                 sizeof(device->phys_connector));
1266         device->bay = id_phys->phys_bay_in_box;
1267 }
1268
1269 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1270         struct pqi_scsi_dev *device)
1271 {
1272         char *status;
1273         static const char unknown_state_str[] =
1274                 "Volume is in an unknown state (%u)";
1275         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1276
1277         switch (device->volume_status) {
1278         case CISS_LV_OK:
1279                 status = "Volume online";
1280                 break;
1281         case CISS_LV_FAILED:
1282                 status = "Volume failed";
1283                 break;
1284         case CISS_LV_NOT_CONFIGURED:
1285                 status = "Volume not configured";
1286                 break;
1287         case CISS_LV_DEGRADED:
1288                 status = "Volume degraded";
1289                 break;
1290         case CISS_LV_READY_FOR_RECOVERY:
1291                 status = "Volume ready for recovery operation";
1292                 break;
1293         case CISS_LV_UNDERGOING_RECOVERY:
1294                 status = "Volume undergoing recovery";
1295                 break;
1296         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1297                 status = "Wrong physical drive was replaced";
1298                 break;
1299         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1300                 status = "A physical drive not properly connected";
1301                 break;
1302         case CISS_LV_HARDWARE_OVERHEATING:
1303                 status = "Hardware is overheating";
1304                 break;
1305         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1306                 status = "Hardware has overheated";
1307                 break;
1308         case CISS_LV_UNDERGOING_EXPANSION:
1309                 status = "Volume undergoing expansion";
1310                 break;
1311         case CISS_LV_NOT_AVAILABLE:
1312                 status = "Volume waiting for transforming volume";
1313                 break;
1314         case CISS_LV_QUEUED_FOR_EXPANSION:
1315                 status = "Volume queued for expansion";
1316                 break;
1317         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1318                 status = "Volume disabled due to SCSI ID conflict";
1319                 break;
1320         case CISS_LV_EJECTED:
1321                 status = "Volume has been ejected";
1322                 break;
1323         case CISS_LV_UNDERGOING_ERASE:
1324                 status = "Volume undergoing background erase";
1325                 break;
1326         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1327                 status = "Volume ready for predictive spare rebuild";
1328                 break;
1329         case CISS_LV_UNDERGOING_RPI:
1330                 status = "Volume undergoing rapid parity initialization";
1331                 break;
1332         case CISS_LV_PENDING_RPI:
1333                 status = "Volume queued for rapid parity initialization";
1334                 break;
1335         case CISS_LV_ENCRYPTED_NO_KEY:
1336                 status = "Encrypted volume inaccessible - key not present";
1337                 break;
1338         case CISS_LV_UNDERGOING_ENCRYPTION:
1339                 status = "Volume undergoing encryption process";
1340                 break;
1341         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1342                 status = "Volume undergoing encryption re-keying process";
1343                 break;
1344         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1345                 status = "Volume encrypted but encryption is disabled";
1346                 break;
1347         case CISS_LV_PENDING_ENCRYPTION:
1348                 status = "Volume pending migration to encrypted state";
1349                 break;
1350         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1351                 status = "Volume pending encryption rekeying";
1352                 break;
1353         case CISS_LV_NOT_SUPPORTED:
1354                 status = "Volume not supported on this controller";
1355                 break;
1356         case CISS_LV_STATUS_UNAVAILABLE:
1357                 status = "Volume status not available";
1358                 break;
1359         default:
1360                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1361                         unknown_state_str, device->volume_status);
1362                 status = unknown_state_buffer;
1363                 break;
1364         }
1365
1366         dev_info(&ctrl_info->pci_dev->dev,
1367                 "scsi %d:%d:%d:%d %s\n",
1368                 ctrl_info->scsi_host->host_no,
1369                 device->bus, device->target, device->lun, status);
1370 }
1371
1372 static void pqi_rescan_worker(struct work_struct *work)
1373 {
1374         struct pqi_ctrl_info *ctrl_info;
1375
1376         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1377                 rescan_work);
1378
1379         pqi_scan_scsi_devices(ctrl_info);
1380 }
1381
1382 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1383         struct pqi_scsi_dev *device)
1384 {
1385         int rc;
1386
1387         if (pqi_is_logical_device(device))
1388                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1389                         device->target, device->lun);
1390         else
1391                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1392
1393         return rc;
1394 }
1395
1396 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
1397         struct pqi_scsi_dev *device)
1398 {
1399         if (pqi_is_logical_device(device))
1400                 scsi_remove_device(device->sdev);
1401         else
1402                 pqi_remove_sas_device(device);
1403 }
1404
1405 /* Assumes the SCSI device list lock is held. */
1406
1407 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1408         int bus, int target, int lun)
1409 {
1410         struct pqi_scsi_dev *device;
1411
1412         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1413                 scsi_device_list_entry)
1414                 if (device->bus == bus && device->target == target &&
1415                         device->lun == lun)
1416                         return device;
1417
1418         return NULL;
1419 }
1420
1421 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1,
1422         struct pqi_scsi_dev *dev2)
1423 {
1424         if (dev1->is_physical_device != dev2->is_physical_device)
1425                 return false;
1426
1427         if (dev1->is_physical_device)
1428                 return dev1->wwid == dev2->wwid;
1429
1430         return memcmp(dev1->volume_id, dev2->volume_id,
1431                 sizeof(dev1->volume_id)) == 0;
1432 }
1433
1434 enum pqi_find_result {
1435         DEVICE_NOT_FOUND,
1436         DEVICE_CHANGED,
1437         DEVICE_SAME,
1438 };
1439
1440 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1441         struct pqi_scsi_dev *device_to_find,
1442         struct pqi_scsi_dev **matching_device)
1443 {
1444         struct pqi_scsi_dev *device;
1445
1446         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1447                 scsi_device_list_entry) {
1448                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr,
1449                         device->scsi3addr)) {
1450                         *matching_device = device;
1451                         if (pqi_device_equal(device_to_find, device)) {
1452                                 if (device_to_find->volume_offline)
1453                                         return DEVICE_CHANGED;
1454                                 return DEVICE_SAME;
1455                         }
1456                         return DEVICE_CHANGED;
1457                 }
1458         }
1459
1460         return DEVICE_NOT_FOUND;
1461 }
1462
1463 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1464
1465 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1466         char *action, struct pqi_scsi_dev *device)
1467 {
1468         ssize_t count;
1469         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1470
1471         count = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1472                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1473
1474         if (device->target_lun_valid)
1475                 count += snprintf(buffer + count,
1476                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1477                         "%d:%d",
1478                         device->target,
1479                         device->lun);
1480         else
1481                 count += snprintf(buffer + count,
1482                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1483                         "-:-");
1484
1485         if (pqi_is_logical_device(device))
1486                 count += snprintf(buffer + count,
1487                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1488                         " %08x%08x",
1489                         *((u32 *)&device->scsi3addr),
1490                         *((u32 *)&device->scsi3addr[4]));
1491         else
1492                 count += snprintf(buffer + count,
1493                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1494                         " %016llx", device->sas_address);
1495
1496         count += snprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1497                 " %s %.8s %.16s ",
1498                 scsi_device_type(device->devtype),
1499                 device->vendor,
1500                 device->model);
1501
1502         if (pqi_is_logical_device(device)) {
1503                 if (device->devtype == TYPE_DISK)
1504                         count += snprintf(buffer + count,
1505                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1506                                 "SSDSmartPathCap%c En%c %-12s",
1507                                 device->raid_bypass_configured ? '+' : '-',
1508                                 device->raid_bypass_enabled ? '+' : '-',
1509                                 pqi_raid_level_to_string(device->raid_level));
1510         } else {
1511                 count += snprintf(buffer + count,
1512                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1513                         "AIO%c", device->aio_enabled ? '+' : '-');
1514                 if (device->devtype == TYPE_DISK ||
1515                         device->devtype == TYPE_ZBC)
1516                         count += snprintf(buffer + count,
1517                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1518                                 " qd=%-6d", device->queue_depth);
1519         }
1520
1521         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
1522 }
1523
1524 /* Assumes the SCSI device list lock is held. */
1525
1526 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1527         struct pqi_scsi_dev *new_device)
1528 {
1529         existing_device->devtype = new_device->devtype;
1530         existing_device->device_type = new_device->device_type;
1531         existing_device->bus = new_device->bus;
1532         if (new_device->target_lun_valid) {
1533                 existing_device->target = new_device->target;
1534                 existing_device->lun = new_device->lun;
1535                 existing_device->target_lun_valid = true;
1536         }
1537
1538         /* By definition, the scsi3addr and wwid fields are already the same. */
1539
1540         existing_device->is_physical_device = new_device->is_physical_device;
1541         existing_device->is_external_raid_device =
1542                 new_device->is_external_raid_device;
1543         existing_device->aio_enabled = new_device->aio_enabled;
1544         memcpy(existing_device->vendor, new_device->vendor,
1545                 sizeof(existing_device->vendor));
1546         memcpy(existing_device->model, new_device->model,
1547                 sizeof(existing_device->model));
1548         existing_device->sas_address = new_device->sas_address;
1549         existing_device->raid_level = new_device->raid_level;
1550         existing_device->queue_depth = new_device->queue_depth;
1551         existing_device->aio_handle = new_device->aio_handle;
1552         existing_device->volume_status = new_device->volume_status;
1553         existing_device->active_path_index = new_device->active_path_index;
1554         existing_device->path_map = new_device->path_map;
1555         existing_device->bay = new_device->bay;
1556         memcpy(existing_device->box, new_device->box,
1557                 sizeof(existing_device->box));
1558         memcpy(existing_device->phys_connector, new_device->phys_connector,
1559                 sizeof(existing_device->phys_connector));
1560         existing_device->offload_to_mirror = 0;
1561         kfree(existing_device->raid_map);
1562         existing_device->raid_map = new_device->raid_map;
1563         existing_device->raid_bypass_configured =
1564                 new_device->raid_bypass_configured;
1565         existing_device->raid_bypass_enabled =
1566                 new_device->raid_bypass_enabled;
1567
1568         /* To prevent this from being freed later. */
1569         new_device->raid_map = NULL;
1570 }
1571
1572 static inline void pqi_free_device(struct pqi_scsi_dev *device)
1573 {
1574         if (device) {
1575                 kfree(device->raid_map);
1576                 kfree(device);
1577         }
1578 }
1579
1580 /*
1581  * Called when exposing a new device to the OS fails in order to re-adjust
1582  * our internal SCSI device list to match the SCSI ML's view.
1583  */
1584
1585 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1586         struct pqi_scsi_dev *device)
1587 {
1588         unsigned long flags;
1589
1590         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1591         list_del(&device->scsi_device_list_entry);
1592         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1593
1594         /* Allow the device structure to be freed later. */
1595         device->keep_device = false;
1596 }
1597
1598 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1599         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1600 {
1601         int rc;
1602         unsigned int i;
1603         unsigned long flags;
1604         enum pqi_find_result find_result;
1605         struct pqi_scsi_dev *device;
1606         struct pqi_scsi_dev *next;
1607         struct pqi_scsi_dev *matching_device;
1608         LIST_HEAD(add_list);
1609         LIST_HEAD(delete_list);
1610
1611         /*
1612          * The idea here is to do as little work as possible while holding the
1613          * spinlock.  That's why we go to great pains to defer anything other
1614          * than updating the internal device list until after we release the
1615          * spinlock.
1616          */
1617
1618         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1619
1620         /* Assume that all devices in the existing list have gone away. */
1621         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1622                 scsi_device_list_entry)
1623                 device->device_gone = true;
1624
1625         for (i = 0; i < num_new_devices; i++) {
1626                 device = new_device_list[i];
1627
1628                 find_result = pqi_scsi_find_entry(ctrl_info, device,
1629                                                 &matching_device);
1630
1631                 switch (find_result) {
1632                 case DEVICE_SAME:
1633                         /*
1634                          * The newly found device is already in the existing
1635                          * device list.
1636                          */
1637                         device->new_device = false;
1638                         matching_device->device_gone = false;
1639                         pqi_scsi_update_device(matching_device, device);
1640                         break;
1641                 case DEVICE_NOT_FOUND:
1642                         /*
1643                          * The newly found device is NOT in the existing device
1644                          * list.
1645                          */
1646                         device->new_device = true;
1647                         break;
1648                 case DEVICE_CHANGED:
1649                         /*
1650                          * The original device has gone away and we need to add
1651                          * the new device.
1652                          */
1653                         device->new_device = true;
1654                         break;
1655                 }
1656         }
1657
1658         /* Process all devices that have gone away. */
1659         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1660                 scsi_device_list_entry) {
1661                 if (device->device_gone) {
1662                         list_del(&device->scsi_device_list_entry);
1663                         list_add_tail(&device->delete_list_entry, &delete_list);
1664                 }
1665         }
1666
1667         /* Process all new devices. */
1668         for (i = 0; i < num_new_devices; i++) {
1669                 device = new_device_list[i];
1670                 if (!device->new_device)
1671                         continue;
1672                 if (device->volume_offline)
1673                         continue;
1674                 list_add_tail(&device->scsi_device_list_entry,
1675                         &ctrl_info->scsi_device_list);
1676                 list_add_tail(&device->add_list_entry, &add_list);
1677                 /* To prevent this device structure from being freed later. */
1678                 device->keep_device = true;
1679         }
1680
1681         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1682
1683         /* Remove all devices that have gone away. */
1684         list_for_each_entry_safe(device, next, &delete_list,
1685                 delete_list_entry) {
1686                 if (device->volume_offline) {
1687                         pqi_dev_info(ctrl_info, "offline", device);
1688                         pqi_show_volume_status(ctrl_info, device);
1689                 } else {
1690                         pqi_dev_info(ctrl_info, "removed", device);
1691                 }
1692                 if (device->sdev)
1693                         pqi_remove_device(ctrl_info, device);
1694                 list_del(&device->delete_list_entry);
1695                 pqi_free_device(device);
1696         }
1697
1698         /*
1699          * Notify the SCSI ML if the queue depth of any existing device has
1700          * changed.
1701          */
1702         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1703                 scsi_device_list_entry) {
1704                 if (device->sdev && device->queue_depth !=
1705                         device->advertised_queue_depth) {
1706                         device->advertised_queue_depth = device->queue_depth;
1707                         scsi_change_queue_depth(device->sdev,
1708                                 device->advertised_queue_depth);
1709                 }
1710         }
1711
1712         /* Expose any new devices. */
1713         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
1714                 if (!device->sdev) {
1715                         pqi_dev_info(ctrl_info, "added", device);
1716                         rc = pqi_add_device(ctrl_info, device);
1717                         if (rc) {
1718                                 dev_warn(&ctrl_info->pci_dev->dev,
1719                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
1720                                         ctrl_info->scsi_host->host_no,
1721                                         device->bus, device->target,
1722                                         device->lun);
1723                                 pqi_fixup_botched_add(ctrl_info, device);
1724                         }
1725                 }
1726         }
1727 }
1728
1729 static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
1730 {
1731         bool is_supported = false;
1732
1733         switch (device->devtype) {
1734         case TYPE_DISK:
1735         case TYPE_ZBC:
1736         case TYPE_TAPE:
1737         case TYPE_MEDIUM_CHANGER:
1738         case TYPE_ENCLOSURE:
1739                 is_supported = true;
1740                 break;
1741         case TYPE_RAID:
1742                 /*
1743                  * Only support the HBA controller itself as a RAID
1744                  * controller.  If it's a RAID controller other than
1745                  * the HBA itself (an external RAID controller, for
1746                  * example), we don't support it.
1747                  */
1748                 if (pqi_is_hba_lunid(device->scsi3addr))
1749                         is_supported = true;
1750                 break;
1751         }
1752
1753         return is_supported;
1754 }
1755
1756 static inline bool pqi_skip_device(u8 *scsi3addr)
1757 {
1758         /* Ignore all masked devices. */
1759         if (MASKED_DEVICE(scsi3addr))
1760                 return true;
1761
1762         return false;
1763 }
1764
1765 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1766 {
1767         int i;
1768         int rc;
1769         LIST_HEAD(new_device_list_head);
1770         struct report_phys_lun_extended *physdev_list = NULL;
1771         struct report_log_lun_extended *logdev_list = NULL;
1772         struct report_phys_lun_extended_entry *phys_lun_ext_entry;
1773         struct report_log_lun_extended_entry *log_lun_ext_entry;
1774         struct bmic_identify_physical_device *id_phys = NULL;
1775         u32 num_physicals;
1776         u32 num_logicals;
1777         struct pqi_scsi_dev **new_device_list = NULL;
1778         struct pqi_scsi_dev *device;
1779         struct pqi_scsi_dev *next;
1780         unsigned int num_new_devices;
1781         unsigned int num_valid_devices;
1782         bool is_physical_device;
1783         u8 *scsi3addr;
1784         static char *out_of_memory_msg =
1785                 "failed to allocate memory, device discovery stopped";
1786
1787         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
1788         if (rc)
1789                 goto out;
1790
1791         if (physdev_list)
1792                 num_physicals =
1793                         get_unaligned_be32(&physdev_list->header.list_length)
1794                                 / sizeof(physdev_list->lun_entries[0]);
1795         else
1796                 num_physicals = 0;
1797
1798         if (logdev_list)
1799                 num_logicals =
1800                         get_unaligned_be32(&logdev_list->header.list_length)
1801                                 / sizeof(logdev_list->lun_entries[0]);
1802         else
1803                 num_logicals = 0;
1804
1805         if (num_physicals) {
1806                 /*
1807                  * We need this buffer for calls to pqi_get_physical_disk_info()
1808                  * below.  We allocate it here instead of inside
1809                  * pqi_get_physical_disk_info() because it's a fairly large
1810                  * buffer.
1811                  */
1812                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
1813                 if (!id_phys) {
1814                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1815                                 out_of_memory_msg);
1816                         rc = -ENOMEM;
1817                         goto out;
1818                 }
1819         }
1820
1821         num_new_devices = num_physicals + num_logicals;
1822
1823         new_device_list = kmalloc_array(num_new_devices,
1824                                         sizeof(*new_device_list),
1825                                         GFP_KERNEL);
1826         if (!new_device_list) {
1827                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
1828                 rc = -ENOMEM;
1829                 goto out;
1830         }
1831
1832         for (i = 0; i < num_new_devices; i++) {
1833                 device = kzalloc(sizeof(*device), GFP_KERNEL);
1834                 if (!device) {
1835                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1836                                 out_of_memory_msg);
1837                         rc = -ENOMEM;
1838                         goto out;
1839                 }
1840                 list_add_tail(&device->new_device_list_entry,
1841                         &new_device_list_head);
1842         }
1843
1844         device = NULL;
1845         num_valid_devices = 0;
1846
1847         for (i = 0; i < num_new_devices; i++) {
1848
1849                 if (i < num_physicals) {
1850                         is_physical_device = true;
1851                         phys_lun_ext_entry = &physdev_list->lun_entries[i];
1852                         log_lun_ext_entry = NULL;
1853                         scsi3addr = phys_lun_ext_entry->lunid;
1854                 } else {
1855                         is_physical_device = false;
1856                         phys_lun_ext_entry = NULL;
1857                         log_lun_ext_entry =
1858                                 &logdev_list->lun_entries[i - num_physicals];
1859                         scsi3addr = log_lun_ext_entry->lunid;
1860                 }
1861
1862                 if (is_physical_device && pqi_skip_device(scsi3addr))
1863                         continue;
1864
1865                 if (device)
1866                         device = list_next_entry(device, new_device_list_entry);
1867                 else
1868                         device = list_first_entry(&new_device_list_head,
1869                                 struct pqi_scsi_dev, new_device_list_entry);
1870
1871                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
1872                 device->is_physical_device = is_physical_device;
1873                 if (!is_physical_device)
1874                         device->is_external_raid_device =
1875                                 pqi_is_external_raid_addr(scsi3addr);
1876
1877                 /* Gather information about the device. */
1878                 rc = pqi_get_device_info(ctrl_info, device);
1879                 if (rc == -ENOMEM) {
1880                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1881                                 out_of_memory_msg);
1882                         goto out;
1883                 }
1884                 if (rc) {
1885                         if (device->is_physical_device)
1886                                 dev_warn(&ctrl_info->pci_dev->dev,
1887                                         "obtaining device info failed, skipping physical device %016llx\n",
1888                                         get_unaligned_be64(
1889                                                 &phys_lun_ext_entry->wwid));
1890                         else
1891                                 dev_warn(&ctrl_info->pci_dev->dev,
1892                                         "obtaining device info failed, skipping logical device %08x%08x\n",
1893                                         *((u32 *)&device->scsi3addr),
1894                                         *((u32 *)&device->scsi3addr[4]));
1895                         rc = 0;
1896                         continue;
1897                 }
1898
1899                 if (!pqi_is_supported_device(device))
1900                         continue;
1901
1902                 pqi_assign_bus_target_lun(device);
1903
1904                 if (device->is_physical_device) {
1905                         device->wwid = phys_lun_ext_entry->wwid;
1906                         if ((phys_lun_ext_entry->device_flags &
1907                                 REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
1908                                 phys_lun_ext_entry->aio_handle)
1909                                 device->aio_enabled = true;
1910                 } else {
1911                         memcpy(device->volume_id, log_lun_ext_entry->volume_id,
1912                                 sizeof(device->volume_id));
1913                 }
1914
1915                 switch (device->devtype) {
1916                 case TYPE_DISK:
1917                 case TYPE_ZBC:
1918                 case TYPE_ENCLOSURE:
1919                         if (device->is_physical_device) {
1920                                 device->sas_address =
1921                                         get_unaligned_be64(&device->wwid);
1922                                 if (device->devtype == TYPE_DISK ||
1923                                         device->devtype == TYPE_ZBC) {
1924                                         device->aio_handle =
1925                                                 phys_lun_ext_entry->aio_handle;
1926                                         pqi_get_physical_disk_info(ctrl_info,
1927                                                 device, id_phys);
1928                                 }
1929                         }
1930                         break;
1931                 }
1932
1933                 new_device_list[num_valid_devices++] = device;
1934         }
1935
1936         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
1937
1938 out:
1939         list_for_each_entry_safe(device, next, &new_device_list_head,
1940                 new_device_list_entry) {
1941                 if (device->keep_device)
1942                         continue;
1943                 list_del(&device->new_device_list_entry);
1944                 pqi_free_device(device);
1945         }
1946
1947         kfree(new_device_list);
1948         kfree(physdev_list);
1949         kfree(logdev_list);
1950         kfree(id_phys);
1951
1952         return rc;
1953 }
1954
1955 static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1956 {
1957         unsigned long flags;
1958         struct pqi_scsi_dev *device;
1959
1960         while (1) {
1961                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1962
1963                 device = list_first_entry_or_null(&ctrl_info->scsi_device_list,
1964                         struct pqi_scsi_dev, scsi_device_list_entry);
1965                 if (device)
1966                         list_del(&device->scsi_device_list_entry);
1967
1968                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
1969                         flags);
1970
1971                 if (!device)
1972                         break;
1973
1974                 if (device->sdev)
1975                         pqi_remove_device(ctrl_info, device);
1976                 pqi_free_device(device);
1977         }
1978 }
1979
1980 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1981 {
1982         int rc;
1983
1984         if (pqi_ctrl_offline(ctrl_info))
1985                 return -ENXIO;
1986
1987         mutex_lock(&ctrl_info->scan_mutex);
1988
1989         rc = pqi_update_scsi_devices(ctrl_info);
1990         if (rc)
1991                 pqi_schedule_rescan_worker_delayed(ctrl_info);
1992
1993         mutex_unlock(&ctrl_info->scan_mutex);
1994
1995         return rc;
1996 }
1997
1998 static void pqi_scan_start(struct Scsi_Host *shost)
1999 {
2000         pqi_scan_scsi_devices(shost_to_hba(shost));
2001 }
2002
2003 /* Returns TRUE if scan is finished. */
2004
2005 static int pqi_scan_finished(struct Scsi_Host *shost,
2006         unsigned long elapsed_time)
2007 {
2008         struct pqi_ctrl_info *ctrl_info;
2009
2010         ctrl_info = shost_priv(shost);
2011
2012         return !mutex_is_locked(&ctrl_info->scan_mutex);
2013 }
2014
2015 static void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info)
2016 {
2017         mutex_lock(&ctrl_info->scan_mutex);
2018         mutex_unlock(&ctrl_info->scan_mutex);
2019 }
2020
2021 static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info)
2022 {
2023         mutex_lock(&ctrl_info->lun_reset_mutex);
2024         mutex_unlock(&ctrl_info->lun_reset_mutex);
2025 }
2026
2027 static inline void pqi_set_encryption_info(
2028         struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
2029         u64 first_block)
2030 {
2031         u32 volume_blk_size;
2032
2033         /*
2034          * Set the encryption tweak values based on logical block address.
2035          * If the block size is 512, the tweak value is equal to the LBA.
2036          * For other block sizes, tweak value is (LBA * block size) / 512.
2037          */
2038         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2039         if (volume_blk_size != 512)
2040                 first_block = (first_block * volume_blk_size) / 512;
2041
2042         encryption_info->data_encryption_key_index =
2043                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2044         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2045         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2046 }
2047
2048 /*
2049  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2050  */
2051
2052 #define PQI_RAID_BYPASS_INELIGIBLE      1
2053
2054 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2055         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2056         struct pqi_queue_group *queue_group)
2057 {
2058         struct raid_map *raid_map;
2059         bool is_write = false;
2060         u32 map_index;
2061         u64 first_block;
2062         u64 last_block;
2063         u32 block_cnt;
2064         u32 blocks_per_row;
2065         u64 first_row;
2066         u64 last_row;
2067         u32 first_row_offset;
2068         u32 last_row_offset;
2069         u32 first_column;
2070         u32 last_column;
2071         u64 r0_first_row;
2072         u64 r0_last_row;
2073         u32 r5or6_blocks_per_row;
2074         u64 r5or6_first_row;
2075         u64 r5or6_last_row;
2076         u32 r5or6_first_row_offset;
2077         u32 r5or6_last_row_offset;
2078         u32 r5or6_first_column;
2079         u32 r5or6_last_column;
2080         u16 data_disks_per_row;
2081         u32 total_disks_per_row;
2082         u16 layout_map_count;
2083         u32 stripesize;
2084         u16 strip_size;
2085         u32 first_group;
2086         u32 last_group;
2087         u32 current_group;
2088         u32 map_row;
2089         u32 aio_handle;
2090         u64 disk_block;
2091         u32 disk_block_cnt;
2092         u8 cdb[16];
2093         u8 cdb_length;
2094         int offload_to_mirror;
2095         struct pqi_encryption_info *encryption_info_ptr;
2096         struct pqi_encryption_info encryption_info;
2097 #if BITS_PER_LONG == 32
2098         u64 tmpdiv;
2099 #endif
2100
2101         /* Check for valid opcode, get LBA and block count. */
2102         switch (scmd->cmnd[0]) {
2103         case WRITE_6:
2104                 is_write = true;
2105                 /* fall through */
2106         case READ_6:
2107                 first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2108                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2109                 block_cnt = (u32)scmd->cmnd[4];
2110                 if (block_cnt == 0)
2111                         block_cnt = 256;
2112                 break;
2113         case WRITE_10:
2114                 is_write = true;
2115                 /* fall through */
2116         case READ_10:
2117                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2118                 block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2119                 break;
2120         case WRITE_12:
2121                 is_write = true;
2122                 /* fall through */
2123         case READ_12:
2124                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2125                 block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2126                 break;
2127         case WRITE_16:
2128                 is_write = true;
2129                 /* fall through */
2130         case READ_16:
2131                 first_block = get_unaligned_be64(&scmd->cmnd[2]);
2132                 block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2133                 break;
2134         default:
2135                 /* Process via normal I/O path. */
2136                 return PQI_RAID_BYPASS_INELIGIBLE;
2137         }
2138
2139         /* Check for write to non-RAID-0. */
2140         if (is_write && device->raid_level != SA_RAID_0)
2141                 return PQI_RAID_BYPASS_INELIGIBLE;
2142
2143         if (unlikely(block_cnt == 0))
2144                 return PQI_RAID_BYPASS_INELIGIBLE;
2145
2146         last_block = first_block + block_cnt - 1;
2147         raid_map = device->raid_map;
2148
2149         /* Check for invalid block or wraparound. */
2150         if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2151                 last_block < first_block)
2152                 return PQI_RAID_BYPASS_INELIGIBLE;
2153
2154         data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
2155         strip_size = get_unaligned_le16(&raid_map->strip_size);
2156         layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2157
2158         /* Calculate stripe information for the request. */
2159         blocks_per_row = data_disks_per_row * strip_size;
2160 #if BITS_PER_LONG == 32
2161         tmpdiv = first_block;
2162         do_div(tmpdiv, blocks_per_row);
2163         first_row = tmpdiv;
2164         tmpdiv = last_block;
2165         do_div(tmpdiv, blocks_per_row);
2166         last_row = tmpdiv;
2167         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2168         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2169         tmpdiv = first_row_offset;
2170         do_div(tmpdiv, strip_size);
2171         first_column = tmpdiv;
2172         tmpdiv = last_row_offset;
2173         do_div(tmpdiv, strip_size);
2174         last_column = tmpdiv;
2175 #else
2176         first_row = first_block / blocks_per_row;
2177         last_row = last_block / blocks_per_row;
2178         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2179         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2180         first_column = first_row_offset / strip_size;
2181         last_column = last_row_offset / strip_size;
2182 #endif
2183
2184         /* If this isn't a single row/column then give to the controller. */
2185         if (first_row != last_row || first_column != last_column)
2186                 return PQI_RAID_BYPASS_INELIGIBLE;
2187
2188         /* Proceeding with driver mapping. */
2189         total_disks_per_row = data_disks_per_row +
2190                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2191         map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2192                 get_unaligned_le16(&raid_map->row_cnt);
2193         map_index = (map_row * total_disks_per_row) + first_column;
2194
2195         /* RAID 1 */
2196         if (device->raid_level == SA_RAID_1) {
2197                 if (device->offload_to_mirror)
2198                         map_index += data_disks_per_row;
2199                 device->offload_to_mirror = !device->offload_to_mirror;
2200         } else if (device->raid_level == SA_RAID_ADM) {
2201                 /* RAID ADM */
2202                 /*
2203                  * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
2204                  * divisible by 3.
2205                  */
2206                 offload_to_mirror = device->offload_to_mirror;
2207                 if (offload_to_mirror == 0)  {
2208                         /* use physical disk in the first mirrored group. */
2209                         map_index %= data_disks_per_row;
2210                 } else {
2211                         do {
2212                                 /*
2213                                  * Determine mirror group that map_index
2214                                  * indicates.
2215                                  */
2216                                 current_group = map_index / data_disks_per_row;
2217
2218                                 if (offload_to_mirror != current_group) {
2219                                         if (current_group <
2220                                                 layout_map_count - 1) {
2221                                                 /*
2222                                                  * Select raid index from
2223                                                  * next group.
2224                                                  */
2225                                                 map_index += data_disks_per_row;
2226                                                 current_group++;
2227                                         } else {
2228                                                 /*
2229                                                  * Select raid index from first
2230                                                  * group.
2231                                                  */
2232                                                 map_index %= data_disks_per_row;
2233                                                 current_group = 0;
2234                                         }
2235                                 }
2236                         } while (offload_to_mirror != current_group);
2237                 }
2238
2239                 /* Set mirror group to use next time. */
2240                 offload_to_mirror =
2241                         (offload_to_mirror >= layout_map_count - 1) ?
2242                                 0 : offload_to_mirror + 1;
2243                 WARN_ON(offload_to_mirror >= layout_map_count);
2244                 device->offload_to_mirror = offload_to_mirror;
2245                 /*
2246                  * Avoid direct use of device->offload_to_mirror within this
2247                  * function since multiple threads might simultaneously
2248                  * increment it beyond the range of device->layout_map_count -1.
2249                  */
2250         } else if ((device->raid_level == SA_RAID_5 ||
2251                 device->raid_level == SA_RAID_6) && layout_map_count > 1) {
2252                 /* RAID 50/60 */
2253                 /* Verify first and last block are in same RAID group */
2254                 r5or6_blocks_per_row = strip_size * data_disks_per_row;
2255                 stripesize = r5or6_blocks_per_row * layout_map_count;
2256 #if BITS_PER_LONG == 32
2257                 tmpdiv = first_block;
2258                 first_group = do_div(tmpdiv, stripesize);
2259                 tmpdiv = first_group;
2260                 do_div(tmpdiv, r5or6_blocks_per_row);
2261                 first_group = tmpdiv;
2262                 tmpdiv = last_block;
2263                 last_group = do_div(tmpdiv, stripesize);
2264                 tmpdiv = last_group;
2265                 do_div(tmpdiv, r5or6_blocks_per_row);
2266                 last_group = tmpdiv;
2267 #else
2268                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
2269                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
2270 #endif
2271                 if (first_group != last_group)
2272                         return PQI_RAID_BYPASS_INELIGIBLE;
2273
2274                 /* Verify request is in a single row of RAID 5/6 */
2275 #if BITS_PER_LONG == 32
2276                 tmpdiv = first_block;
2277                 do_div(tmpdiv, stripesize);
2278                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
2279                 tmpdiv = last_block;
2280                 do_div(tmpdiv, stripesize);
2281                 r5or6_last_row = r0_last_row = tmpdiv;
2282 #else
2283                 first_row = r5or6_first_row = r0_first_row =
2284                         first_block / stripesize;
2285                 r5or6_last_row = r0_last_row = last_block / stripesize;
2286 #endif
2287                 if (r5or6_first_row != r5or6_last_row)
2288                         return PQI_RAID_BYPASS_INELIGIBLE;
2289
2290                 /* Verify request is in a single column */
2291 #if BITS_PER_LONG == 32
2292                 tmpdiv = first_block;
2293                 first_row_offset = do_div(tmpdiv, stripesize);
2294                 tmpdiv = first_row_offset;
2295                 first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
2296                 r5or6_first_row_offset = first_row_offset;
2297                 tmpdiv = last_block;
2298                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
2299                 tmpdiv = r5or6_last_row_offset;
2300                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
2301                 tmpdiv = r5or6_first_row_offset;
2302                 do_div(tmpdiv, strip_size);
2303                 first_column = r5or6_first_column = tmpdiv;
2304                 tmpdiv = r5or6_last_row_offset;
2305                 do_div(tmpdiv, strip_size);
2306                 r5or6_last_column = tmpdiv;
2307 #else
2308                 first_row_offset = r5or6_first_row_offset =
2309                         (u32)((first_block % stripesize) %
2310                         r5or6_blocks_per_row);
2311
2312                 r5or6_last_row_offset =
2313                         (u32)((last_block % stripesize) %
2314                         r5or6_blocks_per_row);
2315
2316                 first_column = r5or6_first_row_offset / strip_size;
2317                 r5or6_first_column = first_column;
2318                 r5or6_last_column = r5or6_last_row_offset / strip_size;
2319 #endif
2320                 if (r5or6_first_column != r5or6_last_column)
2321                         return PQI_RAID_BYPASS_INELIGIBLE;
2322
2323                 /* Request is eligible */
2324                 map_row =
2325                         ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2326                         get_unaligned_le16(&raid_map->row_cnt);
2327
2328                 map_index = (first_group *
2329                         (get_unaligned_le16(&raid_map->row_cnt) *
2330                         total_disks_per_row)) +
2331                         (map_row * total_disks_per_row) + first_column;
2332         }
2333
2334         if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
2335                 return PQI_RAID_BYPASS_INELIGIBLE;
2336
2337         aio_handle = raid_map->disk_data[map_index].aio_handle;
2338         disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2339                 first_row * strip_size +
2340                 (first_row_offset - first_column * strip_size);
2341         disk_block_cnt = block_cnt;
2342
2343         /* Handle differing logical/physical block sizes. */
2344         if (raid_map->phys_blk_shift) {
2345                 disk_block <<= raid_map->phys_blk_shift;
2346                 disk_block_cnt <<= raid_map->phys_blk_shift;
2347         }
2348
2349         if (unlikely(disk_block_cnt > 0xffff))
2350                 return PQI_RAID_BYPASS_INELIGIBLE;
2351
2352         /* Build the new CDB for the physical disk I/O. */
2353         if (disk_block > 0xffffffff) {
2354                 cdb[0] = is_write ? WRITE_16 : READ_16;
2355                 cdb[1] = 0;
2356                 put_unaligned_be64(disk_block, &cdb[2]);
2357                 put_unaligned_be32(disk_block_cnt, &cdb[10]);
2358                 cdb[14] = 0;
2359                 cdb[15] = 0;
2360                 cdb_length = 16;
2361         } else {
2362                 cdb[0] = is_write ? WRITE_10 : READ_10;
2363                 cdb[1] = 0;
2364                 put_unaligned_be32((u32)disk_block, &cdb[2]);
2365                 cdb[6] = 0;
2366                 put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
2367                 cdb[9] = 0;
2368                 cdb_length = 10;
2369         }
2370
2371         if (get_unaligned_le16(&raid_map->flags) &
2372                 RAID_MAP_ENCRYPTION_ENABLED) {
2373                 pqi_set_encryption_info(&encryption_info, raid_map,
2374                         first_block);
2375                 encryption_info_ptr = &encryption_info;
2376         } else {
2377                 encryption_info_ptr = NULL;
2378         }
2379
2380         return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
2381                 cdb, cdb_length, queue_group, encryption_info_ptr, true);
2382 }
2383
2384 #define PQI_STATUS_IDLE         0x0
2385
2386 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
2387 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
2388
2389 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
2390 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
2391 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
2392 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
2393 #define PQI_DEVICE_STATE_ERROR                          0x4
2394
2395 #define PQI_MODE_READY_TIMEOUT_SECS             30
2396 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
2397
2398 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2399 {
2400         struct pqi_device_registers __iomem *pqi_registers;
2401         unsigned long timeout;
2402         u64 signature;
2403         u8 status;
2404
2405         pqi_registers = ctrl_info->pqi_registers;
2406         timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
2407
2408         while (1) {
2409                 signature = readq(&pqi_registers->signature);
2410                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2411                         sizeof(signature)) == 0)
2412                         break;
2413                 if (time_after(jiffies, timeout)) {
2414                         dev_err(&ctrl_info->pci_dev->dev,
2415                                 "timed out waiting for PQI signature\n");
2416                         return -ETIMEDOUT;
2417                 }
2418                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2419         }
2420
2421         while (1) {
2422                 status = readb(&pqi_registers->function_and_status_code);
2423                 if (status == PQI_STATUS_IDLE)
2424                         break;
2425                 if (time_after(jiffies, timeout)) {
2426                         dev_err(&ctrl_info->pci_dev->dev,
2427                                 "timed out waiting for PQI IDLE\n");
2428                         return -ETIMEDOUT;
2429                 }
2430                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2431         }
2432
2433         while (1) {
2434                 if (readl(&pqi_registers->device_status) ==
2435                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2436                         break;
2437                 if (time_after(jiffies, timeout)) {
2438                         dev_err(&ctrl_info->pci_dev->dev,
2439                                 "timed out waiting for PQI all registers ready\n");
2440                         return -ETIMEDOUT;
2441                 }
2442                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2443         }
2444
2445         return 0;
2446 }
2447
2448 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2449 {
2450         struct pqi_scsi_dev *device;
2451
2452         device = io_request->scmd->device->hostdata;
2453         device->raid_bypass_enabled = false;
2454         device->aio_enabled = false;
2455 }
2456
2457 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
2458 {
2459         struct pqi_ctrl_info *ctrl_info;
2460         struct pqi_scsi_dev *device;
2461
2462         device = sdev->hostdata;
2463         if (device->device_offline)
2464                 return;
2465
2466         device->device_offline = true;
2467         scsi_device_set_state(sdev, SDEV_OFFLINE);
2468         ctrl_info = shost_to_hba(sdev->host);
2469         pqi_schedule_rescan_worker(ctrl_info);
2470         dev_err(&ctrl_info->pci_dev->dev, "offlined %s scsi %d:%d:%d:%d\n",
2471                 path, ctrl_info->scsi_host->host_no, device->bus,
2472                 device->target, device->lun);
2473 }
2474
2475 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2476 {
2477         u8 scsi_status;
2478         u8 host_byte;
2479         struct scsi_cmnd *scmd;
2480         struct pqi_raid_error_info *error_info;
2481         size_t sense_data_length;
2482         int residual_count;
2483         int xfer_count;
2484         struct scsi_sense_hdr sshdr;
2485
2486         scmd = io_request->scmd;
2487         if (!scmd)
2488                 return;
2489
2490         error_info = io_request->error_info;
2491         scsi_status = error_info->status;
2492         host_byte = DID_OK;
2493
2494         switch (error_info->data_out_result) {
2495         case PQI_DATA_IN_OUT_GOOD:
2496                 break;
2497         case PQI_DATA_IN_OUT_UNDERFLOW:
2498                 xfer_count =
2499                         get_unaligned_le32(&error_info->data_out_transferred);
2500                 residual_count = scsi_bufflen(scmd) - xfer_count;
2501                 scsi_set_resid(scmd, residual_count);
2502                 if (xfer_count < scmd->underflow)
2503                         host_byte = DID_SOFT_ERROR;
2504                 break;
2505         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
2506         case PQI_DATA_IN_OUT_ABORTED:
2507                 host_byte = DID_ABORT;
2508                 break;
2509         case PQI_DATA_IN_OUT_TIMEOUT:
2510                 host_byte = DID_TIME_OUT;
2511                 break;
2512         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
2513         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
2514         case PQI_DATA_IN_OUT_BUFFER_ERROR:
2515         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
2516         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
2517         case PQI_DATA_IN_OUT_ERROR:
2518         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
2519         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
2520         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
2521         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
2522         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
2523         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
2524         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
2525         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
2526         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
2527         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
2528         default:
2529                 host_byte = DID_ERROR;
2530                 break;
2531         }
2532
2533         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2534         if (sense_data_length == 0)
2535                 sense_data_length =
2536                         get_unaligned_le16(&error_info->response_data_length);
2537         if (sense_data_length) {
2538                 if (sense_data_length > sizeof(error_info->data))
2539                         sense_data_length = sizeof(error_info->data);
2540
2541                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
2542                         scsi_normalize_sense(error_info->data,
2543                                 sense_data_length, &sshdr) &&
2544                                 sshdr.sense_key == HARDWARE_ERROR &&
2545                                 sshdr.asc == 0x3e &&
2546                                 sshdr.ascq == 0x1) {
2547                         pqi_take_device_offline(scmd->device, "RAID");
2548                         host_byte = DID_NO_CONNECT;
2549                 }
2550
2551                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2552                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
2553                 memcpy(scmd->sense_buffer, error_info->data,
2554                         sense_data_length);
2555         }
2556
2557         scmd->result = scsi_status;
2558         set_host_byte(scmd, host_byte);
2559 }
2560
2561 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
2562 {
2563         u8 scsi_status;
2564         u8 host_byte;
2565         struct scsi_cmnd *scmd;
2566         struct pqi_aio_error_info *error_info;
2567         size_t sense_data_length;
2568         int residual_count;
2569         int xfer_count;
2570         bool device_offline;
2571
2572         scmd = io_request->scmd;
2573         error_info = io_request->error_info;
2574         host_byte = DID_OK;
2575         sense_data_length = 0;
2576         device_offline = false;
2577
2578         switch (error_info->service_response) {
2579         case PQI_AIO_SERV_RESPONSE_COMPLETE:
2580                 scsi_status = error_info->status;
2581                 break;
2582         case PQI_AIO_SERV_RESPONSE_FAILURE:
2583                 switch (error_info->status) {
2584                 case PQI_AIO_STATUS_IO_ABORTED:
2585                         scsi_status = SAM_STAT_TASK_ABORTED;
2586                         break;
2587                 case PQI_AIO_STATUS_UNDERRUN:
2588                         scsi_status = SAM_STAT_GOOD;
2589                         residual_count = get_unaligned_le32(
2590                                                 &error_info->residual_count);
2591                         scsi_set_resid(scmd, residual_count);
2592                         xfer_count = scsi_bufflen(scmd) - residual_count;
2593                         if (xfer_count < scmd->underflow)
2594                                 host_byte = DID_SOFT_ERROR;
2595                         break;
2596                 case PQI_AIO_STATUS_OVERRUN:
2597                         scsi_status = SAM_STAT_GOOD;
2598                         break;
2599                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
2600                         pqi_aio_path_disabled(io_request);
2601                         scsi_status = SAM_STAT_GOOD;
2602                         io_request->status = -EAGAIN;
2603                         break;
2604                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
2605                 case PQI_AIO_STATUS_INVALID_DEVICE:
2606                         if (!io_request->raid_bypass) {
2607                                 device_offline = true;
2608                                 pqi_take_device_offline(scmd->device, "AIO");
2609                                 host_byte = DID_NO_CONNECT;
2610                         }
2611                         scsi_status = SAM_STAT_CHECK_CONDITION;
2612                         break;
2613                 case PQI_AIO_STATUS_IO_ERROR:
2614                 default:
2615                         scsi_status = SAM_STAT_CHECK_CONDITION;
2616                         break;
2617                 }
2618                 break;
2619         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
2620         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
2621                 scsi_status = SAM_STAT_GOOD;
2622                 break;
2623         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
2624         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
2625         default:
2626                 scsi_status = SAM_STAT_CHECK_CONDITION;
2627                 break;
2628         }
2629
2630         if (error_info->data_present) {
2631                 sense_data_length =
2632                         get_unaligned_le16(&error_info->data_length);
2633                 if (sense_data_length) {
2634                         if (sense_data_length > sizeof(error_info->data))
2635                                 sense_data_length = sizeof(error_info->data);
2636                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2637                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
2638                         memcpy(scmd->sense_buffer, error_info->data,
2639                                 sense_data_length);
2640                 }
2641         }
2642
2643         if (device_offline && sense_data_length == 0)
2644                 scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR,
2645                         0x3e, 0x1);
2646
2647         scmd->result = scsi_status;
2648         set_host_byte(scmd, host_byte);
2649 }
2650
2651 static void pqi_process_io_error(unsigned int iu_type,
2652         struct pqi_io_request *io_request)
2653 {
2654         switch (iu_type) {
2655         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2656                 pqi_process_raid_io_error(io_request);
2657                 break;
2658         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2659                 pqi_process_aio_io_error(io_request);
2660                 break;
2661         }
2662 }
2663
2664 static int pqi_interpret_task_management_response(
2665         struct pqi_task_management_response *response)
2666 {
2667         int rc;
2668
2669         switch (response->response_code) {
2670         case SOP_TMF_COMPLETE:
2671         case SOP_TMF_FUNCTION_SUCCEEDED:
2672                 rc = 0;
2673                 break;
2674         default:
2675                 rc = -EIO;
2676                 break;
2677         }
2678
2679         return rc;
2680 }
2681
2682 static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
2683         struct pqi_queue_group *queue_group)
2684 {
2685         unsigned int num_responses;
2686         pqi_index_t oq_pi;
2687         pqi_index_t oq_ci;
2688         struct pqi_io_request *io_request;
2689         struct pqi_io_response *response;
2690         u16 request_id;
2691
2692         num_responses = 0;
2693         oq_ci = queue_group->oq_ci_copy;
2694
2695         while (1) {
2696                 oq_pi = *queue_group->oq_pi;
2697                 if (oq_pi == oq_ci)
2698                         break;
2699
2700                 num_responses++;
2701                 response = queue_group->oq_element_array +
2702                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
2703
2704                 request_id = get_unaligned_le16(&response->request_id);
2705                 WARN_ON(request_id >= ctrl_info->max_io_slots);
2706
2707                 io_request = &ctrl_info->io_request_pool[request_id];
2708                 WARN_ON(atomic_read(&io_request->refcount) == 0);
2709
2710                 switch (response->header.iu_type) {
2711                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
2712                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
2713                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
2714                         break;
2715                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
2716                         io_request->status =
2717                                 pqi_interpret_task_management_response(
2718                                         (void *)response);
2719                         break;
2720                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
2721                         pqi_aio_path_disabled(io_request);
2722                         io_request->status = -EAGAIN;
2723                         break;
2724                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2725                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2726                         io_request->error_info = ctrl_info->error_buffer +
2727                                 (get_unaligned_le16(&response->error_index) *
2728                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
2729                         pqi_process_io_error(response->header.iu_type,
2730                                 io_request);
2731                         break;
2732                 default:
2733                         dev_err(&ctrl_info->pci_dev->dev,
2734                                 "unexpected IU type: 0x%x\n",
2735                                 response->header.iu_type);
2736                         break;
2737                 }
2738
2739                 io_request->io_complete_callback(io_request,
2740                         io_request->context);
2741
2742                 /*
2743                  * Note that the I/O request structure CANNOT BE TOUCHED after
2744                  * returning from the I/O completion callback!
2745                  */
2746
2747                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
2748         }
2749
2750         if (num_responses) {
2751                 queue_group->oq_ci_copy = oq_ci;
2752                 writel(oq_ci, queue_group->oq_ci);
2753         }
2754
2755         return num_responses;
2756 }
2757
2758 static inline unsigned int pqi_num_elements_free(unsigned int pi,
2759         unsigned int ci, unsigned int elements_in_queue)
2760 {
2761         unsigned int num_elements_used;
2762
2763         if (pi >= ci)
2764                 num_elements_used = pi - ci;
2765         else
2766                 num_elements_used = elements_in_queue - ci + pi;
2767
2768         return elements_in_queue - num_elements_used - 1;
2769 }
2770
2771 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
2772         struct pqi_event_acknowledge_request *iu, size_t iu_length)
2773 {
2774         pqi_index_t iq_pi;
2775         pqi_index_t iq_ci;
2776         unsigned long flags;
2777         void *next_element;
2778         struct pqi_queue_group *queue_group;
2779
2780         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
2781         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
2782
2783         while (1) {
2784                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
2785
2786                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
2787                 iq_ci = *queue_group->iq_ci[RAID_PATH];
2788
2789                 if (pqi_num_elements_free(iq_pi, iq_ci,
2790                         ctrl_info->num_elements_per_iq))
2791                         break;
2792
2793                 spin_unlock_irqrestore(
2794                         &queue_group->submit_lock[RAID_PATH], flags);
2795
2796                 if (pqi_ctrl_offline(ctrl_info))
2797                         return;
2798         }
2799
2800         next_element = queue_group->iq_element_array[RAID_PATH] +
2801                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
2802
2803         memcpy(next_element, iu, iu_length);
2804
2805         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
2806         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
2807
2808         /*
2809          * This write notifies the controller that an IU is available to be
2810          * processed.
2811          */
2812         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
2813
2814         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
2815 }
2816
2817 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
2818         struct pqi_event *event)
2819 {
2820         struct pqi_event_acknowledge_request request;
2821
2822         memset(&request, 0, sizeof(request));
2823
2824         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
2825         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
2826                 &request.header.iu_length);
2827         request.event_type = event->event_type;
2828         request.event_id = event->event_id;
2829         request.additional_event_id = event->additional_event_id;
2830
2831         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
2832 }
2833
2834 static void pqi_event_worker(struct work_struct *work)
2835 {
2836         unsigned int i;
2837         struct pqi_ctrl_info *ctrl_info;
2838         struct pqi_event *event;
2839
2840         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
2841
2842         pqi_ctrl_busy(ctrl_info);
2843         pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
2844         if (pqi_ctrl_offline(ctrl_info))
2845                 goto out;
2846
2847         pqi_schedule_rescan_worker_delayed(ctrl_info);
2848
2849         event = ctrl_info->events;
2850         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
2851                 if (event->pending) {
2852                         event->pending = false;
2853                         pqi_acknowledge_event(ctrl_info, event);
2854                 }
2855                 event++;
2856         }
2857
2858 out:
2859         pqi_ctrl_unbusy(ctrl_info);
2860 }
2861
2862 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * HZ)
2863
2864 static void pqi_heartbeat_timer_handler(struct timer_list *t)
2865 {
2866         int num_interrupts;
2867         u32 heartbeat_count;
2868         struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t,
2869                                                      heartbeat_timer);
2870
2871         pqi_check_ctrl_health(ctrl_info);
2872         if (pqi_ctrl_offline(ctrl_info))
2873                 return;
2874
2875         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
2876         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
2877
2878         if (num_interrupts == ctrl_info->previous_num_interrupts) {
2879                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
2880                         dev_err(&ctrl_info->pci_dev->dev,
2881                                 "no heartbeat detected - last heartbeat count: %u\n",
2882                                 heartbeat_count);
2883                         pqi_take_ctrl_offline(ctrl_info);
2884                         return;
2885                 }
2886         } else {
2887                 ctrl_info->previous_num_interrupts = num_interrupts;
2888         }
2889
2890         ctrl_info->previous_heartbeat_count = heartbeat_count;
2891         mod_timer(&ctrl_info->heartbeat_timer,
2892                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
2893 }
2894
2895 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2896 {
2897         if (!ctrl_info->heartbeat_counter)
2898                 return;
2899
2900         ctrl_info->previous_num_interrupts =
2901                 atomic_read(&ctrl_info->num_interrupts);
2902         ctrl_info->previous_heartbeat_count =
2903                 pqi_read_heartbeat_counter(ctrl_info);
2904
2905         ctrl_info->heartbeat_timer.expires =
2906                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
2907         add_timer(&ctrl_info->heartbeat_timer);
2908 }
2909
2910 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2911 {
2912         del_timer_sync(&ctrl_info->heartbeat_timer);
2913 }
2914
2915 static inline int pqi_event_type_to_event_index(unsigned int event_type)
2916 {
2917         int index;
2918
2919         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
2920                 if (event_type == pqi_supported_event_types[index])
2921                         return index;
2922
2923         return -1;
2924 }
2925
2926 static inline bool pqi_is_supported_event(unsigned int event_type)
2927 {
2928         return pqi_event_type_to_event_index(event_type) != -1;
2929 }
2930
2931 static unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
2932 {
2933         unsigned int num_events;
2934         pqi_index_t oq_pi;
2935         pqi_index_t oq_ci;
2936         struct pqi_event_queue *event_queue;
2937         struct pqi_event_response *response;
2938         struct pqi_event *event;
2939         int event_index;
2940
2941         event_queue = &ctrl_info->event_queue;
2942         num_events = 0;
2943         oq_ci = event_queue->oq_ci_copy;
2944
2945         while (1) {
2946                 oq_pi = *event_queue->oq_pi;
2947                 if (oq_pi == oq_ci)
2948                         break;
2949
2950                 num_events++;
2951                 response = event_queue->oq_element_array +
2952                         (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
2953
2954                 event_index =
2955                         pqi_event_type_to_event_index(response->event_type);
2956
2957                 if (event_index >= 0) {
2958                         if (response->request_acknowlege) {
2959                                 event = &ctrl_info->events[event_index];
2960                                 event->pending = true;
2961                                 event->event_type = response->event_type;
2962                                 event->event_id = response->event_id;
2963                                 event->additional_event_id =
2964                                         response->additional_event_id;
2965                         }
2966                 }
2967
2968                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
2969         }
2970
2971         if (num_events) {
2972                 event_queue->oq_ci_copy = oq_ci;
2973                 writel(oq_ci, event_queue->oq_ci);
2974                 schedule_work(&ctrl_info->event_work);
2975         }
2976
2977         return num_events;
2978 }
2979
2980 #define PQI_LEGACY_INTX_MASK    0x1
2981
2982 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info,
2983                                                 bool enable_intx)
2984 {
2985         u32 intx_mask;
2986         struct pqi_device_registers __iomem *pqi_registers;
2987         volatile void __iomem *register_addr;
2988
2989         pqi_registers = ctrl_info->pqi_registers;
2990
2991         if (enable_intx)
2992                 register_addr = &pqi_registers->legacy_intx_mask_clear;
2993         else
2994                 register_addr = &pqi_registers->legacy_intx_mask_set;
2995
2996         intx_mask = readl(register_addr);
2997         intx_mask |= PQI_LEGACY_INTX_MASK;
2998         writel(intx_mask, register_addr);
2999 }
3000
3001 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3002         enum pqi_irq_mode new_mode)
3003 {
3004         switch (ctrl_info->irq_mode) {
3005         case IRQ_MODE_MSIX:
3006                 switch (new_mode) {
3007                 case IRQ_MODE_MSIX:
3008                         break;
3009                 case IRQ_MODE_INTX:
3010                         pqi_configure_legacy_intx(ctrl_info, true);
3011                         sis_enable_intx(ctrl_info);
3012                         break;
3013                 case IRQ_MODE_NONE:
3014                         break;
3015                 }
3016                 break;
3017         case IRQ_MODE_INTX:
3018                 switch (new_mode) {
3019                 case IRQ_MODE_MSIX:
3020                         pqi_configure_legacy_intx(ctrl_info, false);
3021                         sis_enable_msix(ctrl_info);
3022                         break;
3023                 case IRQ_MODE_INTX:
3024                         break;
3025                 case IRQ_MODE_NONE:
3026                         pqi_configure_legacy_intx(ctrl_info, false);
3027                         break;
3028                 }
3029                 break;
3030         case IRQ_MODE_NONE:
3031                 switch (new_mode) {
3032                 case IRQ_MODE_MSIX:
3033                         sis_enable_msix(ctrl_info);
3034                         break;
3035                 case IRQ_MODE_INTX:
3036                         pqi_configure_legacy_intx(ctrl_info, true);
3037                         sis_enable_intx(ctrl_info);
3038                         break;
3039                 case IRQ_MODE_NONE:
3040                         break;
3041                 }
3042                 break;
3043         }
3044
3045         ctrl_info->irq_mode = new_mode;
3046 }
3047
3048 #define PQI_LEGACY_INTX_PENDING         0x1
3049
3050 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3051 {
3052         bool valid_irq;
3053         u32 intx_status;
3054
3055         switch (ctrl_info->irq_mode) {
3056         case IRQ_MODE_MSIX:
3057                 valid_irq = true;
3058                 break;
3059         case IRQ_MODE_INTX:
3060                 intx_status =
3061                         readl(&ctrl_info->pqi_registers->legacy_intx_status);
3062                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3063                         valid_irq = true;
3064                 else
3065                         valid_irq = false;
3066                 break;
3067         case IRQ_MODE_NONE:
3068         default:
3069                 valid_irq = false;
3070                 break;
3071         }
3072
3073         return valid_irq;
3074 }
3075
3076 static irqreturn_t pqi_irq_handler(int irq, void *data)
3077 {
3078         struct pqi_ctrl_info *ctrl_info;
3079         struct pqi_queue_group *queue_group;
3080         unsigned int num_responses_handled;
3081
3082         queue_group = data;
3083         ctrl_info = queue_group->ctrl_info;
3084
3085         if (!pqi_is_valid_irq(ctrl_info))
3086                 return IRQ_NONE;
3087
3088         num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3089
3090         if (irq == ctrl_info->event_irq)
3091                 num_responses_handled += pqi_process_event_intr(ctrl_info);
3092
3093         if (num_responses_handled)
3094                 atomic_inc(&ctrl_info->num_interrupts);
3095
3096         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3097         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3098
3099         return IRQ_HANDLED;
3100 }
3101
3102 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3103 {
3104         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3105         int i;
3106         int rc;
3107
3108         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3109
3110         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3111                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3112                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3113                 if (rc) {
3114                         dev_err(&pci_dev->dev,
3115                                 "irq %u init failed with error %d\n",
3116                                 pci_irq_vector(pci_dev, i), rc);
3117                         return rc;
3118                 }
3119                 ctrl_info->num_msix_vectors_initialized++;
3120         }
3121
3122         return 0;
3123 }
3124
3125 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3126 {
3127         int i;
3128
3129         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3130                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3131                         &ctrl_info->queue_groups[i]);
3132
3133         ctrl_info->num_msix_vectors_initialized = 0;
3134 }
3135
3136 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3137 {
3138         int num_vectors_enabled;
3139
3140         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3141                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3142                         PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3143         if (num_vectors_enabled < 0) {
3144                 dev_err(&ctrl_info->pci_dev->dev,
3145                         "MSI-X init failed with error %d\n",
3146                         num_vectors_enabled);
3147                 return num_vectors_enabled;
3148         }
3149
3150         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
3151         ctrl_info->irq_mode = IRQ_MODE_MSIX;
3152         return 0;
3153 }
3154
3155 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3156 {
3157         if (ctrl_info->num_msix_vectors_enabled) {
3158                 pci_free_irq_vectors(ctrl_info->pci_dev);
3159                 ctrl_info->num_msix_vectors_enabled = 0;
3160         }
3161 }
3162
3163 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
3164 {
3165         unsigned int i;
3166         size_t alloc_length;
3167         size_t element_array_length_per_iq;
3168         size_t element_array_length_per_oq;
3169         void *element_array;
3170         void *next_queue_index;
3171         void *aligned_pointer;
3172         unsigned int num_inbound_queues;
3173         unsigned int num_outbound_queues;
3174         unsigned int num_queue_indexes;
3175         struct pqi_queue_group *queue_group;
3176
3177         element_array_length_per_iq =
3178                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
3179                 ctrl_info->num_elements_per_iq;
3180         element_array_length_per_oq =
3181                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
3182                 ctrl_info->num_elements_per_oq;
3183         num_inbound_queues = ctrl_info->num_queue_groups * 2;
3184         num_outbound_queues = ctrl_info->num_queue_groups;
3185         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3186
3187         aligned_pointer = NULL;
3188
3189         for (i = 0; i < num_inbound_queues; i++) {
3190                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3191                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3192                 aligned_pointer += element_array_length_per_iq;
3193         }
3194
3195         for (i = 0; i < num_outbound_queues; i++) {
3196                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3197                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3198                 aligned_pointer += element_array_length_per_oq;
3199         }
3200
3201         aligned_pointer = PTR_ALIGN(aligned_pointer,
3202                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3203         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3204                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3205
3206         for (i = 0; i < num_queue_indexes; i++) {
3207                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3208                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3209                 aligned_pointer += sizeof(pqi_index_t);
3210         }
3211
3212         alloc_length = (size_t)aligned_pointer +
3213                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3214
3215         alloc_length += PQI_EXTRA_SGL_MEMORY;
3216
3217         ctrl_info->queue_memory_base =
3218                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3219                         alloc_length,
3220                         &ctrl_info->queue_memory_base_dma_handle, GFP_KERNEL);
3221
3222         if (!ctrl_info->queue_memory_base)
3223                 return -ENOMEM;
3224
3225         ctrl_info->queue_memory_length = alloc_length;
3226
3227         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3228                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3229
3230         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3231                 queue_group = &ctrl_info->queue_groups[i];
3232                 queue_group->iq_element_array[RAID_PATH] = element_array;
3233                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
3234                         ctrl_info->queue_memory_base_dma_handle +
3235                                 (element_array - ctrl_info->queue_memory_base);
3236                 element_array += element_array_length_per_iq;
3237                 element_array = PTR_ALIGN(element_array,
3238                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3239                 queue_group->iq_element_array[AIO_PATH] = element_array;
3240                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
3241                         ctrl_info->queue_memory_base_dma_handle +
3242                         (element_array - ctrl_info->queue_memory_base);
3243                 element_array += element_array_length_per_iq;
3244                 element_array = PTR_ALIGN(element_array,
3245                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3246         }
3247
3248         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3249                 queue_group = &ctrl_info->queue_groups[i];
3250                 queue_group->oq_element_array = element_array;
3251                 queue_group->oq_element_array_bus_addr =
3252                         ctrl_info->queue_memory_base_dma_handle +
3253                         (element_array - ctrl_info->queue_memory_base);
3254                 element_array += element_array_length_per_oq;
3255                 element_array = PTR_ALIGN(element_array,
3256                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3257         }
3258
3259         ctrl_info->event_queue.oq_element_array = element_array;
3260         ctrl_info->event_queue.oq_element_array_bus_addr =
3261                 ctrl_info->queue_memory_base_dma_handle +
3262                 (element_array - ctrl_info->queue_memory_base);
3263         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3264                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3265
3266         next_queue_index = PTR_ALIGN(element_array,
3267                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
3268
3269         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3270                 queue_group = &ctrl_info->queue_groups[i];
3271                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
3272                 queue_group->iq_ci_bus_addr[RAID_PATH] =
3273                         ctrl_info->queue_memory_base_dma_handle +
3274                         (next_queue_index - ctrl_info->queue_memory_base);
3275                 next_queue_index += sizeof(pqi_index_t);
3276                 next_queue_index = PTR_ALIGN(next_queue_index,
3277                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3278                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
3279                 queue_group->iq_ci_bus_addr[AIO_PATH] =
3280                         ctrl_info->queue_memory_base_dma_handle +
3281                         (next_queue_index - ctrl_info->queue_memory_base);
3282                 next_queue_index += sizeof(pqi_index_t);
3283                 next_queue_index = PTR_ALIGN(next_queue_index,
3284                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3285                 queue_group->oq_pi = next_queue_index;
3286                 queue_group->oq_pi_bus_addr =
3287                         ctrl_info->queue_memory_base_dma_handle +
3288                         (next_queue_index - ctrl_info->queue_memory_base);
3289                 next_queue_index += sizeof(pqi_index_t);
3290                 next_queue_index = PTR_ALIGN(next_queue_index,
3291                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3292         }
3293
3294         ctrl_info->event_queue.oq_pi = next_queue_index;
3295         ctrl_info->event_queue.oq_pi_bus_addr =
3296                 ctrl_info->queue_memory_base_dma_handle +
3297                 (next_queue_index - ctrl_info->queue_memory_base);
3298
3299         return 0;
3300 }
3301
3302 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3303 {
3304         unsigned int i;
3305         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3306         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3307
3308         /*
3309          * Initialize the backpointers to the controller structure in
3310          * each operational queue group structure.
3311          */
3312         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3313                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
3314
3315         /*
3316          * Assign IDs to all operational queues.  Note that the IDs
3317          * assigned to operational IQs are independent of the IDs
3318          * assigned to operational OQs.
3319          */
3320         ctrl_info->event_queue.oq_id = next_oq_id++;
3321         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3322                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
3323                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
3324                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
3325         }
3326
3327         /*
3328          * Assign MSI-X table entry indexes to all queues.  Note that the
3329          * interrupt for the event queue is shared with the first queue group.
3330          */
3331         ctrl_info->event_queue.int_msg_num = 0;
3332         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3333                 ctrl_info->queue_groups[i].int_msg_num = i;
3334
3335         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3336                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
3337                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
3338                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
3339                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
3340         }
3341 }
3342
3343 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
3344 {
3345         size_t alloc_length;
3346         struct pqi_admin_queues_aligned *admin_queues_aligned;
3347         struct pqi_admin_queues *admin_queues;
3348
3349         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
3350                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3351
3352         ctrl_info->admin_queue_memory_base =
3353                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3354                         alloc_length,
3355                         &ctrl_info->admin_queue_memory_base_dma_handle,
3356                         GFP_KERNEL);
3357
3358         if (!ctrl_info->admin_queue_memory_base)
3359                 return -ENOMEM;
3360
3361         ctrl_info->admin_queue_memory_length = alloc_length;
3362
3363         admin_queues = &ctrl_info->admin_queues;
3364         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
3365                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3366         admin_queues->iq_element_array =
3367                 &admin_queues_aligned->iq_element_array;
3368         admin_queues->oq_element_array =
3369                 &admin_queues_aligned->oq_element_array;
3370         admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
3371         admin_queues->oq_pi = &admin_queues_aligned->oq_pi;
3372
3373         admin_queues->iq_element_array_bus_addr =
3374                 ctrl_info->admin_queue_memory_base_dma_handle +
3375                 (admin_queues->iq_element_array -
3376                 ctrl_info->admin_queue_memory_base);
3377         admin_queues->oq_element_array_bus_addr =
3378                 ctrl_info->admin_queue_memory_base_dma_handle +
3379                 (admin_queues->oq_element_array -
3380                 ctrl_info->admin_queue_memory_base);
3381         admin_queues->iq_ci_bus_addr =
3382                 ctrl_info->admin_queue_memory_base_dma_handle +
3383                 ((void *)admin_queues->iq_ci -
3384                 ctrl_info->admin_queue_memory_base);
3385         admin_queues->oq_pi_bus_addr =
3386                 ctrl_info->admin_queue_memory_base_dma_handle +
3387                 ((void *)admin_queues->oq_pi -
3388                 ctrl_info->admin_queue_memory_base);
3389
3390         return 0;
3391 }
3392
3393 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          HZ
3394 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
3395
3396 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
3397 {
3398         struct pqi_device_registers __iomem *pqi_registers;
3399         struct pqi_admin_queues *admin_queues;
3400         unsigned long timeout;
3401         u8 status;
3402         u32 reg;
3403
3404         pqi_registers = ctrl_info->pqi_registers;
3405         admin_queues = &ctrl_info->admin_queues;
3406
3407         writeq((u64)admin_queues->iq_element_array_bus_addr,
3408                 &pqi_registers->admin_iq_element_array_addr);
3409         writeq((u64)admin_queues->oq_element_array_bus_addr,
3410                 &pqi_registers->admin_oq_element_array_addr);
3411         writeq((u64)admin_queues->iq_ci_bus_addr,
3412                 &pqi_registers->admin_iq_ci_addr);
3413         writeq((u64)admin_queues->oq_pi_bus_addr,
3414                 &pqi_registers->admin_oq_pi_addr);
3415
3416         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
3417                 (PQI_ADMIN_OQ_NUM_ELEMENTS) << 8 |
3418                 (admin_queues->int_msg_num << 16);
3419         writel(reg, &pqi_registers->admin_iq_num_elements);
3420         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
3421                 &pqi_registers->function_and_status_code);
3422
3423         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
3424         while (1) {
3425                 status = readb(&pqi_registers->function_and_status_code);
3426                 if (status == PQI_STATUS_IDLE)
3427                         break;
3428                 if (time_after(jiffies, timeout))
3429                         return -ETIMEDOUT;
3430                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
3431         }
3432
3433         /*
3434          * The offset registers are not initialized to the correct
3435          * offsets until *after* the create admin queue pair command
3436          * completes successfully.
3437          */
3438         admin_queues->iq_pi = ctrl_info->iomem_base +
3439                 PQI_DEVICE_REGISTERS_OFFSET +
3440                 readq(&pqi_registers->admin_iq_pi_offset);
3441         admin_queues->oq_ci = ctrl_info->iomem_base +
3442                 PQI_DEVICE_REGISTERS_OFFSET +
3443                 readq(&pqi_registers->admin_oq_ci_offset);
3444
3445         return 0;
3446 }
3447
3448 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
3449         struct pqi_general_admin_request *request)
3450 {
3451         struct pqi_admin_queues *admin_queues;
3452         void *next_element;
3453         pqi_index_t iq_pi;
3454
3455         admin_queues = &ctrl_info->admin_queues;
3456         iq_pi = admin_queues->iq_pi_copy;
3457
3458         next_element = admin_queues->iq_element_array +
3459                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
3460
3461         memcpy(next_element, request, sizeof(*request));
3462
3463         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
3464         admin_queues->iq_pi_copy = iq_pi;
3465
3466         /*
3467          * This write notifies the controller that an IU is available to be
3468          * processed.
3469          */
3470         writel(iq_pi, admin_queues->iq_pi);
3471 }
3472
3473 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
3474
3475 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
3476         struct pqi_general_admin_response *response)
3477 {
3478         struct pqi_admin_queues *admin_queues;
3479         pqi_index_t oq_pi;
3480         pqi_index_t oq_ci;
3481         unsigned long timeout;
3482
3483         admin_queues = &ctrl_info->admin_queues;
3484         oq_ci = admin_queues->oq_ci_copy;
3485
3486         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * HZ) + jiffies;
3487
3488         while (1) {
3489                 oq_pi = *admin_queues->oq_pi;
3490                 if (oq_pi != oq_ci)
3491                         break;
3492                 if (time_after(jiffies, timeout)) {
3493                         dev_err(&ctrl_info->pci_dev->dev,
3494                                 "timed out waiting for admin response\n");
3495                         return -ETIMEDOUT;
3496                 }
3497                 if (!sis_is_firmware_running(ctrl_info))
3498                         return -ENXIO;
3499                 usleep_range(1000, 2000);
3500         }
3501
3502         memcpy(response, admin_queues->oq_element_array +
3503                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
3504
3505         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
3506         admin_queues->oq_ci_copy = oq_ci;
3507         writel(oq_ci, admin_queues->oq_ci);
3508
3509         return 0;
3510 }
3511
3512 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
3513         struct pqi_queue_group *queue_group, enum pqi_io_path path,
3514         struct pqi_io_request *io_request)
3515 {
3516         struct pqi_io_request *next;
3517         void *next_element;
3518         pqi_index_t iq_pi;
3519         pqi_index_t iq_ci;
3520         size_t iu_length;
3521         unsigned long flags;
3522         unsigned int num_elements_needed;
3523         unsigned int num_elements_to_end_of_queue;
3524         size_t copy_count;
3525         struct pqi_iu_header *request;
3526
3527         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
3528
3529         if (io_request) {
3530                 io_request->queue_group = queue_group;
3531                 list_add_tail(&io_request->request_list_entry,
3532                         &queue_group->request_list[path]);
3533         }
3534
3535         iq_pi = queue_group->iq_pi_copy[path];
3536
3537         list_for_each_entry_safe(io_request, next,
3538                 &queue_group->request_list[path], request_list_entry) {
3539
3540                 request = io_request->iu;
3541
3542                 iu_length = get_unaligned_le16(&request->iu_length) +
3543                         PQI_REQUEST_HEADER_LENGTH;
3544                 num_elements_needed =
3545                         DIV_ROUND_UP(iu_length,
3546                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3547
3548                 iq_ci = *queue_group->iq_ci[path];
3549
3550                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
3551                         ctrl_info->num_elements_per_iq))
3552                         break;
3553
3554                 put_unaligned_le16(queue_group->oq_id,
3555                         &request->response_queue_id);
3556
3557                 next_element = queue_group->iq_element_array[path] +
3558                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3559
3560                 num_elements_to_end_of_queue =
3561                         ctrl_info->num_elements_per_iq - iq_pi;
3562
3563                 if (num_elements_needed <= num_elements_to_end_of_queue) {
3564                         memcpy(next_element, request, iu_length);
3565                 } else {
3566                         copy_count = num_elements_to_end_of_queue *
3567                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
3568                         memcpy(next_element, request, copy_count);
3569                         memcpy(queue_group->iq_element_array[path],
3570                                 (u8 *)request + copy_count,
3571                                 iu_length - copy_count);
3572                 }
3573
3574                 iq_pi = (iq_pi + num_elements_needed) %
3575                         ctrl_info->num_elements_per_iq;
3576
3577                 list_del(&io_request->request_list_entry);
3578         }
3579
3580         if (iq_pi != queue_group->iq_pi_copy[path]) {
3581                 queue_group->iq_pi_copy[path] = iq_pi;
3582                 /*
3583                  * This write notifies the controller that one or more IUs are
3584                  * available to be processed.
3585                  */
3586                 writel(iq_pi, queue_group->iq_pi[path]);
3587         }
3588
3589         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
3590 }
3591
3592 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
3593
3594 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
3595         struct completion *wait)
3596 {
3597         int rc;
3598
3599         while (1) {
3600                 if (wait_for_completion_io_timeout(wait,
3601                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * HZ)) {
3602                         rc = 0;
3603                         break;
3604                 }
3605
3606                 pqi_check_ctrl_health(ctrl_info);
3607                 if (pqi_ctrl_offline(ctrl_info)) {
3608                         rc = -ENXIO;
3609                         break;
3610                 }
3611         }
3612
3613         return rc;
3614 }
3615
3616 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
3617         void *context)
3618 {
3619         struct completion *waiting = context;
3620
3621         complete(waiting);
3622 }
3623
3624 static int pqi_submit_raid_request_synchronous_with_io_request(
3625         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
3626         unsigned long timeout_msecs)
3627 {
3628         int rc = 0;
3629         DECLARE_COMPLETION_ONSTACK(wait);
3630
3631         io_request->io_complete_callback = pqi_raid_synchronous_complete;
3632         io_request->context = &wait;
3633
3634         pqi_start_io(ctrl_info,
3635                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
3636                 io_request);
3637
3638         if (timeout_msecs == NO_TIMEOUT) {
3639                 pqi_wait_for_completion_io(ctrl_info, &wait);
3640         } else {
3641                 if (!wait_for_completion_io_timeout(&wait,
3642                         msecs_to_jiffies(timeout_msecs))) {
3643                         dev_warn(&ctrl_info->pci_dev->dev,
3644                                 "command timed out\n");
3645                         rc = -ETIMEDOUT;
3646                 }
3647         }
3648
3649         return rc;
3650 }
3651
3652 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
3653         struct pqi_iu_header *request, unsigned int flags,
3654         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
3655 {
3656         int rc;
3657         struct pqi_io_request *io_request;
3658         unsigned long start_jiffies;
3659         unsigned long msecs_blocked;
3660         size_t iu_length;
3661
3662         /*
3663          * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
3664          * are mutually exclusive.
3665          */
3666
3667         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
3668                 if (down_interruptible(&ctrl_info->sync_request_sem))
3669                         return -ERESTARTSYS;
3670         } else {
3671                 if (timeout_msecs == NO_TIMEOUT) {
3672                         down(&ctrl_info->sync_request_sem);
3673                 } else {
3674                         start_jiffies = jiffies;
3675                         if (down_timeout(&ctrl_info->sync_request_sem,
3676                                 msecs_to_jiffies(timeout_msecs)))
3677                                 return -ETIMEDOUT;
3678                         msecs_blocked =
3679                                 jiffies_to_msecs(jiffies - start_jiffies);
3680                         if (msecs_blocked >= timeout_msecs)
3681                                 return -ETIMEDOUT;
3682                         timeout_msecs -= msecs_blocked;
3683                 }
3684         }
3685
3686         pqi_ctrl_busy(ctrl_info);
3687         timeout_msecs = pqi_wait_if_ctrl_blocked(ctrl_info, timeout_msecs);
3688         if (timeout_msecs == 0) {
3689                 rc = -ETIMEDOUT;
3690                 goto out;
3691         }
3692
3693         if (pqi_ctrl_offline(ctrl_info)) {
3694                 rc = -ENXIO;
3695                 goto out;
3696         }
3697
3698         io_request = pqi_alloc_io_request(ctrl_info);
3699
3700         put_unaligned_le16(io_request->index,
3701                 &(((struct pqi_raid_path_request *)request)->request_id));
3702
3703         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
3704                 ((struct pqi_raid_path_request *)request)->error_index =
3705                         ((struct pqi_raid_path_request *)request)->request_id;
3706
3707         iu_length = get_unaligned_le16(&request->iu_length) +
3708                 PQI_REQUEST_HEADER_LENGTH;
3709         memcpy(io_request->iu, request, iu_length);
3710
3711         rc = pqi_submit_raid_request_synchronous_with_io_request(ctrl_info,
3712                 io_request, timeout_msecs);
3713
3714         if (error_info) {
3715                 if (io_request->error_info)
3716                         memcpy(error_info, io_request->error_info,
3717                                 sizeof(*error_info));
3718                 else
3719                         memset(error_info, 0, sizeof(*error_info));
3720         } else if (rc == 0 && io_request->error_info) {
3721                 u8 scsi_status;
3722                 struct pqi_raid_error_info *raid_error_info;
3723
3724                 raid_error_info = io_request->error_info;
3725                 scsi_status = raid_error_info->status;
3726
3727                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3728                         raid_error_info->data_out_result ==
3729                         PQI_DATA_IN_OUT_UNDERFLOW)
3730                         scsi_status = SAM_STAT_GOOD;
3731
3732                 if (scsi_status != SAM_STAT_GOOD)
3733                         rc = -EIO;
3734         }
3735
3736         pqi_free_io_request(io_request);
3737
3738 out:
3739         pqi_ctrl_unbusy(ctrl_info);
3740         up(&ctrl_info->sync_request_sem);
3741
3742         return rc;
3743 }
3744
3745 static int pqi_validate_admin_response(
3746         struct pqi_general_admin_response *response, u8 expected_function_code)
3747 {
3748         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
3749                 return -EINVAL;
3750
3751         if (get_unaligned_le16(&response->header.iu_length) !=
3752                 PQI_GENERAL_ADMIN_IU_LENGTH)
3753                 return -EINVAL;
3754
3755         if (response->function_code != expected_function_code)
3756                 return -EINVAL;
3757
3758         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
3759                 return -EINVAL;
3760
3761         return 0;
3762 }
3763
3764 static int pqi_submit_admin_request_synchronous(
3765         struct pqi_ctrl_info *ctrl_info,
3766         struct pqi_general_admin_request *request,
3767         struct pqi_general_admin_response *response)
3768 {
3769         int rc;
3770
3771         pqi_submit_admin_request(ctrl_info, request);
3772
3773         rc = pqi_poll_for_admin_response(ctrl_info, response);
3774
3775         if (rc == 0)
3776                 rc = pqi_validate_admin_response(response,
3777                         request->function_code);
3778
3779         return rc;
3780 }
3781
3782 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
3783 {
3784         int rc;
3785         struct pqi_general_admin_request request;
3786         struct pqi_general_admin_response response;
3787         struct pqi_device_capability *capability;
3788         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
3789
3790         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
3791         if (!capability)
3792                 return -ENOMEM;
3793
3794         memset(&request, 0, sizeof(request));
3795
3796         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3797         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3798                 &request.header.iu_length);
3799         request.function_code =
3800                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
3801         put_unaligned_le32(sizeof(*capability),
3802                 &request.data.report_device_capability.buffer_length);
3803
3804         rc = pqi_map_single(ctrl_info->pci_dev,
3805                 &request.data.report_device_capability.sg_descriptor,
3806                 capability, sizeof(*capability),
3807                 PCI_DMA_FROMDEVICE);
3808         if (rc)
3809                 goto out;
3810
3811         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3812                 &response);
3813
3814         pqi_pci_unmap(ctrl_info->pci_dev,
3815                 &request.data.report_device_capability.sg_descriptor, 1,
3816                 PCI_DMA_FROMDEVICE);
3817
3818         if (rc)
3819                 goto out;
3820
3821         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
3822                 rc = -EIO;
3823                 goto out;
3824         }
3825
3826         ctrl_info->max_inbound_queues =
3827                 get_unaligned_le16(&capability->max_inbound_queues);
3828         ctrl_info->max_elements_per_iq =
3829                 get_unaligned_le16(&capability->max_elements_per_iq);
3830         ctrl_info->max_iq_element_length =
3831                 get_unaligned_le16(&capability->max_iq_element_length)
3832                 * 16;
3833         ctrl_info->max_outbound_queues =
3834                 get_unaligned_le16(&capability->max_outbound_queues);
3835         ctrl_info->max_elements_per_oq =
3836                 get_unaligned_le16(&capability->max_elements_per_oq);
3837         ctrl_info->max_oq_element_length =
3838                 get_unaligned_le16(&capability->max_oq_element_length)
3839                 * 16;
3840
3841         sop_iu_layer_descriptor =
3842                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
3843
3844         ctrl_info->max_inbound_iu_length_per_firmware =
3845                 get_unaligned_le16(
3846                         &sop_iu_layer_descriptor->max_inbound_iu_length);
3847         ctrl_info->inbound_spanning_supported =
3848                 sop_iu_layer_descriptor->inbound_spanning_supported;
3849         ctrl_info->outbound_spanning_supported =
3850                 sop_iu_layer_descriptor->outbound_spanning_supported;
3851
3852 out:
3853         kfree(capability);
3854
3855         return rc;
3856 }
3857
3858 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
3859 {
3860         if (ctrl_info->max_iq_element_length <
3861                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3862                 dev_err(&ctrl_info->pci_dev->dev,
3863                         "max. inbound queue element length of %d is less than the required length of %d\n",
3864                         ctrl_info->max_iq_element_length,
3865                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3866                 return -EINVAL;
3867         }
3868
3869         if (ctrl_info->max_oq_element_length <
3870                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
3871                 dev_err(&ctrl_info->pci_dev->dev,
3872                         "max. outbound queue element length of %d is less than the required length of %d\n",
3873                         ctrl_info->max_oq_element_length,
3874                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3875                 return -EINVAL;
3876         }
3877
3878         if (ctrl_info->max_inbound_iu_length_per_firmware <
3879                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3880                 dev_err(&ctrl_info->pci_dev->dev,
3881                         "max. inbound IU length of %u is less than the min. required length of %d\n",
3882                         ctrl_info->max_inbound_iu_length_per_firmware,
3883                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3884                 return -EINVAL;
3885         }
3886
3887         if (!ctrl_info->inbound_spanning_supported) {
3888                 dev_err(&ctrl_info->pci_dev->dev,
3889                         "the controller does not support inbound spanning\n");
3890                 return -EINVAL;
3891         }
3892
3893         if (ctrl_info->outbound_spanning_supported) {
3894                 dev_err(&ctrl_info->pci_dev->dev,
3895                         "the controller supports outbound spanning but this driver does not\n");
3896                 return -EINVAL;
3897         }
3898
3899         return 0;
3900 }
3901
3902 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
3903 {
3904         int rc;
3905         struct pqi_event_queue *event_queue;
3906         struct pqi_general_admin_request request;
3907         struct pqi_general_admin_response response;
3908
3909         event_queue = &ctrl_info->event_queue;
3910
3911         /*
3912          * Create OQ (Outbound Queue - device to host queue) to dedicate
3913          * to events.
3914          */
3915         memset(&request, 0, sizeof(request));
3916         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3917         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3918                 &request.header.iu_length);
3919         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
3920         put_unaligned_le16(event_queue->oq_id,
3921                 &request.data.create_operational_oq.queue_id);
3922         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
3923                 &request.data.create_operational_oq.element_array_addr);
3924         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
3925                 &request.data.create_operational_oq.pi_addr);
3926         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
3927                 &request.data.create_operational_oq.num_elements);
3928         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
3929                 &request.data.create_operational_oq.element_length);
3930         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
3931         put_unaligned_le16(event_queue->int_msg_num,
3932                 &request.data.create_operational_oq.int_msg_num);
3933
3934         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3935                 &response);
3936         if (rc)
3937                 return rc;
3938
3939         event_queue->oq_ci = ctrl_info->iomem_base +
3940                 PQI_DEVICE_REGISTERS_OFFSET +
3941                 get_unaligned_le64(
3942                         &response.data.create_operational_oq.oq_ci_offset);
3943
3944         return 0;
3945 }
3946
3947 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
3948         unsigned int group_number)
3949 {
3950         int rc;
3951         struct pqi_queue_group *queue_group;
3952         struct pqi_general_admin_request request;
3953         struct pqi_general_admin_response response;
3954
3955         queue_group = &ctrl_info->queue_groups[group_number];
3956
3957         /*
3958          * Create IQ (Inbound Queue - host to device queue) for
3959          * RAID path.
3960          */
3961         memset(&request, 0, sizeof(request));
3962         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3963         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3964                 &request.header.iu_length);
3965         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
3966         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
3967                 &request.data.create_operational_iq.queue_id);
3968         put_unaligned_le64(
3969                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
3970                 &request.data.create_operational_iq.element_array_addr);
3971         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
3972                 &request.data.create_operational_iq.ci_addr);
3973         put_unaligned_le16(ctrl_info->num_elements_per_iq,
3974                 &request.data.create_operational_iq.num_elements);
3975         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
3976                 &request.data.create_operational_iq.element_length);
3977         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
3978
3979         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3980                 &response);
3981         if (rc) {
3982                 dev_err(&ctrl_info->pci_dev->dev,
3983                         "error creating inbound RAID queue\n");
3984                 return rc;
3985         }
3986
3987         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
3988                 PQI_DEVICE_REGISTERS_OFFSET +
3989                 get_unaligned_le64(
3990                         &response.data.create_operational_iq.iq_pi_offset);
3991
3992         /*
3993          * Create IQ (Inbound Queue - host to device queue) for
3994          * Advanced I/O (AIO) path.
3995          */
3996         memset(&request, 0, sizeof(request));
3997         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3998         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3999                 &request.header.iu_length);
4000         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4001         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4002                 &request.data.create_operational_iq.queue_id);
4003         put_unaligned_le64((u64)queue_group->
4004                 iq_element_array_bus_addr[AIO_PATH],
4005                 &request.data.create_operational_iq.element_array_addr);
4006         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4007                 &request.data.create_operational_iq.ci_addr);
4008         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4009                 &request.data.create_operational_iq.num_elements);
4010         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4011                 &request.data.create_operational_iq.element_length);
4012         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4013
4014         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4015                 &response);
4016         if (rc) {
4017                 dev_err(&ctrl_info->pci_dev->dev,
4018                         "error creating inbound AIO queue\n");
4019                 return rc;
4020         }
4021
4022         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4023                 PQI_DEVICE_REGISTERS_OFFSET +
4024                 get_unaligned_le64(
4025                         &response.data.create_operational_iq.iq_pi_offset);
4026
4027         /*
4028          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4029          * assumed to be for RAID path I/O unless we change the queue's
4030          * property.
4031          */
4032         memset(&request, 0, sizeof(request));
4033         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4034         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4035                 &request.header.iu_length);
4036         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4037         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4038                 &request.data.change_operational_iq_properties.queue_id);
4039         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4040                 &request.data.change_operational_iq_properties.vendor_specific);
4041
4042         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4043                 &response);
4044         if (rc) {
4045                 dev_err(&ctrl_info->pci_dev->dev,
4046                         "error changing queue property\n");
4047                 return rc;
4048         }
4049
4050         /*
4051          * Create OQ (Outbound Queue - device to host queue).
4052          */
4053         memset(&request, 0, sizeof(request));
4054         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4055         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4056                 &request.header.iu_length);
4057         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4058         put_unaligned_le16(queue_group->oq_id,
4059                 &request.data.create_operational_oq.queue_id);
4060         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4061                 &request.data.create_operational_oq.element_array_addr);
4062         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4063                 &request.data.create_operational_oq.pi_addr);
4064         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4065                 &request.data.create_operational_oq.num_elements);
4066         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4067                 &request.data.create_operational_oq.element_length);
4068         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4069         put_unaligned_le16(queue_group->int_msg_num,
4070                 &request.data.create_operational_oq.int_msg_num);
4071
4072         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4073                 &response);
4074         if (rc) {
4075                 dev_err(&ctrl_info->pci_dev->dev,
4076                         "error creating outbound queue\n");
4077                 return rc;
4078         }
4079
4080         queue_group->oq_ci = ctrl_info->iomem_base +
4081                 PQI_DEVICE_REGISTERS_OFFSET +
4082                 get_unaligned_le64(
4083                         &response.data.create_operational_oq.oq_ci_offset);
4084
4085         return 0;
4086 }
4087
4088 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4089 {
4090         int rc;
4091         unsigned int i;
4092
4093         rc = pqi_create_event_queue(ctrl_info);
4094         if (rc) {
4095                 dev_err(&ctrl_info->pci_dev->dev,
4096                         "error creating event queue\n");
4097                 return rc;
4098         }
4099
4100         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4101                 rc = pqi_create_queue_group(ctrl_info, i);
4102                 if (rc) {
4103                         dev_err(&ctrl_info->pci_dev->dev,
4104                                 "error creating queue group number %u/%u\n",
4105                                 i, ctrl_info->num_queue_groups);
4106                         return rc;
4107                 }
4108         }
4109
4110         return 0;
4111 }
4112
4113 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4114         (offsetof(struct pqi_event_config, descriptors) + \
4115         (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
4116
4117 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4118         bool enable_events)
4119 {
4120         int rc;
4121         unsigned int i;
4122         struct pqi_event_config *event_config;
4123         struct pqi_event_descriptor *event_descriptor;
4124         struct pqi_general_management_request request;
4125
4126         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4127                 GFP_KERNEL);
4128         if (!event_config)
4129                 return -ENOMEM;
4130
4131         memset(&request, 0, sizeof(request));
4132
4133         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4134         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4135                 data.report_event_configuration.sg_descriptors[1]) -
4136                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4137         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4138                 &request.data.report_event_configuration.buffer_length);
4139
4140         rc = pqi_map_single(ctrl_info->pci_dev,
4141                 request.data.report_event_configuration.sg_descriptors,
4142                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4143                 PCI_DMA_FROMDEVICE);
4144         if (rc)
4145                 goto out;
4146
4147         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
4148                 0, NULL, NO_TIMEOUT);
4149
4150         pqi_pci_unmap(ctrl_info->pci_dev,
4151                 request.data.report_event_configuration.sg_descriptors, 1,
4152                 PCI_DMA_FROMDEVICE);
4153
4154         if (rc)
4155                 goto out;
4156
4157         for (i = 0; i < event_config->num_event_descriptors; i++) {
4158                 event_descriptor = &event_config->descriptors[i];
4159                 if (enable_events &&
4160                         pqi_is_supported_event(event_descriptor->event_type))
4161                         put_unaligned_le16(ctrl_info->event_queue.oq_id,
4162                                         &event_descriptor->oq_id);
4163                 else
4164                         put_unaligned_le16(0, &event_descriptor->oq_id);
4165         }
4166
4167         memset(&request, 0, sizeof(request));
4168
4169         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4170         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4171                 data.report_event_configuration.sg_descriptors[1]) -
4172                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4173         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4174                 &request.data.report_event_configuration.buffer_length);
4175
4176         rc = pqi_map_single(ctrl_info->pci_dev,
4177                 request.data.report_event_configuration.sg_descriptors,
4178                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4179                 PCI_DMA_TODEVICE);
4180         if (rc)
4181                 goto out;
4182
4183         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
4184                 NULL, NO_TIMEOUT);
4185
4186         pqi_pci_unmap(ctrl_info->pci_dev,
4187                 request.data.report_event_configuration.sg_descriptors, 1,
4188                 PCI_DMA_TODEVICE);
4189
4190 out:
4191         kfree(event_config);
4192
4193         return rc;
4194 }
4195
4196 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
4197 {
4198         return pqi_configure_events(ctrl_info, true);
4199 }
4200
4201 static inline int pqi_disable_events(struct pqi_ctrl_info *ctrl_info)
4202 {
4203         return pqi_configure_events(ctrl_info, false);
4204 }
4205
4206 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
4207 {
4208         unsigned int i;
4209         struct device *dev;
4210         size_t sg_chain_buffer_length;
4211         struct pqi_io_request *io_request;
4212
4213         if (!ctrl_info->io_request_pool)
4214                 return;
4215
4216         dev = &ctrl_info->pci_dev->dev;
4217         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4218         io_request = ctrl_info->io_request_pool;
4219
4220         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4221                 kfree(io_request->iu);
4222                 if (!io_request->sg_chain_buffer)
4223                         break;
4224                 dma_free_coherent(dev, sg_chain_buffer_length,
4225                         io_request->sg_chain_buffer,
4226                         io_request->sg_chain_buffer_dma_handle);
4227                 io_request++;
4228         }
4229
4230         kfree(ctrl_info->io_request_pool);
4231         ctrl_info->io_request_pool = NULL;
4232 }
4233
4234 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4235 {
4236         ctrl_info->error_buffer = dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
4237                 ctrl_info->error_buffer_length,
4238                 &ctrl_info->error_buffer_dma_handle, GFP_KERNEL);
4239
4240         if (!ctrl_info->error_buffer)
4241                 return -ENOMEM;
4242
4243         return 0;
4244 }
4245
4246 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4247 {
4248         unsigned int i;
4249         void *sg_chain_buffer;
4250         size_t sg_chain_buffer_length;
4251         dma_addr_t sg_chain_buffer_dma_handle;
4252         struct device *dev;
4253         struct pqi_io_request *io_request;
4254
4255         ctrl_info->io_request_pool = kzalloc(ctrl_info->max_io_slots *
4256                 sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4257
4258         if (!ctrl_info->io_request_pool) {
4259                 dev_err(&ctrl_info->pci_dev->dev,
4260                         "failed to allocate I/O request pool\n");
4261                 goto error;
4262         }
4263
4264         dev = &ctrl_info->pci_dev->dev;
4265         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4266         io_request = ctrl_info->io_request_pool;
4267
4268         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4269                 io_request->iu =
4270                         kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4271
4272                 if (!io_request->iu) {
4273                         dev_err(&ctrl_info->pci_dev->dev,
4274                                 "failed to allocate IU buffers\n");
4275                         goto error;
4276                 }
4277
4278                 sg_chain_buffer = dma_alloc_coherent(dev,
4279                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4280                         GFP_KERNEL);
4281
4282                 if (!sg_chain_buffer) {
4283                         dev_err(&ctrl_info->pci_dev->dev,
4284                                 "failed to allocate PQI scatter-gather chain buffers\n");
4285                         goto error;
4286                 }
4287
4288                 io_request->index = i;
4289                 io_request->sg_chain_buffer = sg_chain_buffer;
4290                 io_request->sg_chain_buffer_dma_handle =
4291                         sg_chain_buffer_dma_handle;
4292                 io_request++;
4293         }
4294
4295         return 0;
4296
4297 error:
4298         pqi_free_all_io_requests(ctrl_info);
4299
4300         return -ENOMEM;
4301 }
4302
4303 /*
4304  * Calculate required resources that are sized based on max. outstanding
4305  * requests and max. transfer size.
4306  */
4307
4308 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4309 {
4310         u32 max_transfer_size;
4311         u32 max_sg_entries;
4312
4313         ctrl_info->scsi_ml_can_queue =
4314                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4315         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4316
4317         ctrl_info->error_buffer_length =
4318                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4319
4320         if (reset_devices)
4321                 max_transfer_size = min(ctrl_info->max_transfer_size,
4322                         PQI_MAX_TRANSFER_SIZE_KDUMP);
4323         else
4324                 max_transfer_size = min(ctrl_info->max_transfer_size,
4325                         PQI_MAX_TRANSFER_SIZE);
4326
4327         max_sg_entries = max_transfer_size / PAGE_SIZE;
4328
4329         /* +1 to cover when the buffer is not page-aligned. */
4330         max_sg_entries++;
4331
4332         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4333
4334         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4335
4336         ctrl_info->sg_chain_buffer_length =
4337                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4338                 PQI_EXTRA_SGL_MEMORY;
4339         ctrl_info->sg_tablesize = max_sg_entries;
4340         ctrl_info->max_sectors = max_transfer_size / 512;
4341 }
4342
4343 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4344 {
4345         int num_queue_groups;
4346         u16 num_elements_per_iq;
4347         u16 num_elements_per_oq;
4348
4349         if (reset_devices) {
4350                 num_queue_groups = 1;
4351         } else {
4352                 int num_cpus;
4353                 int max_queue_groups;
4354
4355                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4356                         ctrl_info->max_outbound_queues - 1);
4357                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4358
4359                 num_cpus = num_online_cpus();
4360                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4361                 num_queue_groups = min(num_queue_groups, max_queue_groups);
4362         }
4363
4364         ctrl_info->num_queue_groups = num_queue_groups;
4365         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
4366
4367         /*
4368          * Make sure that the max. inbound IU length is an even multiple
4369          * of our inbound element length.
4370          */
4371         ctrl_info->max_inbound_iu_length =
4372                 (ctrl_info->max_inbound_iu_length_per_firmware /
4373                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4374                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4375
4376         num_elements_per_iq =
4377                 (ctrl_info->max_inbound_iu_length /
4378                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4379
4380         /* Add one because one element in each queue is unusable. */
4381         num_elements_per_iq++;
4382
4383         num_elements_per_iq = min(num_elements_per_iq,
4384                 ctrl_info->max_elements_per_iq);
4385
4386         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4387         num_elements_per_oq = min(num_elements_per_oq,
4388                 ctrl_info->max_elements_per_oq);
4389
4390         ctrl_info->num_elements_per_iq = num_elements_per_iq;
4391         ctrl_info->num_elements_per_oq = num_elements_per_oq;
4392
4393         ctrl_info->max_sg_per_iu =
4394                 ((ctrl_info->max_inbound_iu_length -
4395                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4396                 sizeof(struct pqi_sg_descriptor)) +
4397                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4398 }
4399
4400 static inline void pqi_set_sg_descriptor(
4401         struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4402 {
4403         u64 address = (u64)sg_dma_address(sg);
4404         unsigned int length = sg_dma_len(sg);
4405
4406         put_unaligned_le64(address, &sg_descriptor->address);
4407         put_unaligned_le32(length, &sg_descriptor->length);
4408         put_unaligned_le32(0, &sg_descriptor->flags);
4409 }
4410
4411 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4412         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4413         struct pqi_io_request *io_request)
4414 {
4415         int i;
4416         u16 iu_length;
4417         int sg_count;
4418         bool chained;
4419         unsigned int num_sg_in_iu;
4420         unsigned int max_sg_per_iu;
4421         struct scatterlist *sg;
4422         struct pqi_sg_descriptor *sg_descriptor;
4423
4424         sg_count = scsi_dma_map(scmd);
4425         if (sg_count < 0)
4426                 return sg_count;
4427
4428         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4429                 PQI_REQUEST_HEADER_LENGTH;
4430
4431         if (sg_count == 0)
4432                 goto out;
4433
4434         sg = scsi_sglist(scmd);
4435         sg_descriptor = request->sg_descriptors;
4436         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4437         chained = false;
4438         num_sg_in_iu = 0;
4439         i = 0;
4440
4441         while (1) {
4442                 pqi_set_sg_descriptor(sg_descriptor, sg);
4443                 if (!chained)
4444                         num_sg_in_iu++;
4445                 i++;
4446                 if (i == sg_count)
4447                         break;
4448                 sg_descriptor++;
4449                 if (i == max_sg_per_iu) {
4450                         put_unaligned_le64(
4451                                 (u64)io_request->sg_chain_buffer_dma_handle,
4452                                 &sg_descriptor->address);
4453                         put_unaligned_le32((sg_count - num_sg_in_iu)
4454                                 * sizeof(*sg_descriptor),
4455                                 &sg_descriptor->length);
4456                         put_unaligned_le32(CISS_SG_CHAIN,
4457                                 &sg_descriptor->flags);
4458                         chained = true;
4459                         num_sg_in_iu++;
4460                         sg_descriptor = io_request->sg_chain_buffer;
4461                 }
4462                 sg = sg_next(sg);
4463         }
4464
4465         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4466         request->partial = chained;
4467         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4468
4469 out:
4470         put_unaligned_le16(iu_length, &request->header.iu_length);
4471
4472         return 0;
4473 }
4474
4475 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4476         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4477         struct pqi_io_request *io_request)
4478 {
4479         int i;
4480         u16 iu_length;
4481         int sg_count;
4482         bool chained;
4483         unsigned int num_sg_in_iu;
4484         unsigned int max_sg_per_iu;
4485         struct scatterlist *sg;
4486         struct pqi_sg_descriptor *sg_descriptor;
4487
4488         sg_count = scsi_dma_map(scmd);
4489         if (sg_count < 0)
4490                 return sg_count;
4491
4492         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4493                 PQI_REQUEST_HEADER_LENGTH;
4494         num_sg_in_iu = 0;
4495
4496         if (sg_count == 0)
4497                 goto out;
4498
4499         sg = scsi_sglist(scmd);
4500         sg_descriptor = request->sg_descriptors;
4501         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4502         chained = false;
4503         i = 0;
4504
4505         while (1) {
4506                 pqi_set_sg_descriptor(sg_descriptor, sg);
4507                 if (!chained)
4508                         num_sg_in_iu++;
4509                 i++;
4510                 if (i == sg_count)
4511                         break;
4512                 sg_descriptor++;
4513                 if (i == max_sg_per_iu) {
4514                         put_unaligned_le64(
4515                                 (u64)io_request->sg_chain_buffer_dma_handle,
4516                                 &sg_descriptor->address);
4517                         put_unaligned_le32((sg_count - num_sg_in_iu)
4518                                 * sizeof(*sg_descriptor),
4519                                 &sg_descriptor->length);
4520                         put_unaligned_le32(CISS_SG_CHAIN,
4521                                 &sg_descriptor->flags);
4522                         chained = true;
4523                         num_sg_in_iu++;
4524                         sg_descriptor = io_request->sg_chain_buffer;
4525                 }
4526                 sg = sg_next(sg);
4527         }
4528
4529         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4530         request->partial = chained;
4531         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4532
4533 out:
4534         put_unaligned_le16(iu_length, &request->header.iu_length);
4535         request->num_sg_descriptors = num_sg_in_iu;
4536
4537         return 0;
4538 }
4539
4540 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4541         void *context)
4542 {
4543         struct scsi_cmnd *scmd;
4544
4545         scmd = io_request->scmd;
4546         pqi_free_io_request(io_request);
4547         scsi_dma_unmap(scmd);
4548         pqi_scsi_done(scmd);
4549 }
4550
4551 static int pqi_raid_submit_scsi_cmd_with_io_request(
4552         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
4553         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4554         struct pqi_queue_group *queue_group)
4555 {
4556         int rc;
4557         size_t cdb_length;
4558         struct pqi_raid_path_request *request;
4559
4560         io_request->io_complete_callback = pqi_raid_io_complete;
4561         io_request->scmd = scmd;
4562
4563         request = io_request->iu;
4564         memset(request, 0,
4565                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4566
4567         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4568         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4569         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4570         put_unaligned_le16(io_request->index, &request->request_id);
4571         request->error_index = request->request_id;
4572         memcpy(request->lun_number, device->scsi3addr,
4573                 sizeof(request->lun_number));
4574
4575         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4576         memcpy(request->cdb, scmd->cmnd, cdb_length);
4577
4578         switch (cdb_length) {
4579         case 6:
4580         case 10:
4581         case 12:
4582         case 16:
4583                 /* No bytes in the Additional CDB bytes field */
4584                 request->additional_cdb_bytes_usage =
4585                         SOP_ADDITIONAL_CDB_BYTES_0;
4586                 break;
4587         case 20:
4588                 /* 4 bytes in the Additional cdb field */
4589                 request->additional_cdb_bytes_usage =
4590                         SOP_ADDITIONAL_CDB_BYTES_4;
4591                 break;
4592         case 24:
4593                 /* 8 bytes in the Additional cdb field */
4594                 request->additional_cdb_bytes_usage =
4595                         SOP_ADDITIONAL_CDB_BYTES_8;
4596                 break;
4597         case 28:
4598                 /* 12 bytes in the Additional cdb field */
4599                 request->additional_cdb_bytes_usage =
4600                         SOP_ADDITIONAL_CDB_BYTES_12;
4601                 break;
4602         case 32:
4603         default:
4604                 /* 16 bytes in the Additional cdb field */
4605                 request->additional_cdb_bytes_usage =
4606                         SOP_ADDITIONAL_CDB_BYTES_16;
4607                 break;
4608         }
4609
4610         switch (scmd->sc_data_direction) {
4611         case DMA_TO_DEVICE:
4612                 request->data_direction = SOP_READ_FLAG;
4613                 break;
4614         case DMA_FROM_DEVICE:
4615                 request->data_direction = SOP_WRITE_FLAG;
4616                 break;
4617         case DMA_NONE:
4618                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4619                 break;
4620         case DMA_BIDIRECTIONAL:
4621                 request->data_direction = SOP_BIDIRECTIONAL;
4622                 break;
4623         default:
4624                 dev_err(&ctrl_info->pci_dev->dev,
4625                         "unknown data direction: %d\n",
4626                         scmd->sc_data_direction);
4627                 break;
4628         }
4629
4630         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
4631         if (rc) {
4632                 pqi_free_io_request(io_request);
4633                 return SCSI_MLQUEUE_HOST_BUSY;
4634         }
4635
4636         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
4637
4638         return 0;
4639 }
4640
4641 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4642         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4643         struct pqi_queue_group *queue_group)
4644 {
4645         struct pqi_io_request *io_request;
4646
4647         io_request = pqi_alloc_io_request(ctrl_info);
4648
4649         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4650                 device, scmd, queue_group);
4651 }
4652
4653 static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info)
4654 {
4655         if (!pqi_ctrl_blocked(ctrl_info))
4656                 schedule_work(&ctrl_info->raid_bypass_retry_work);
4657 }
4658
4659 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
4660 {
4661         struct scsi_cmnd *scmd;
4662         struct pqi_scsi_dev *device;
4663         struct pqi_ctrl_info *ctrl_info;
4664
4665         if (!io_request->raid_bypass)
4666                 return false;
4667
4668         scmd = io_request->scmd;
4669         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
4670                 return false;
4671         if (host_byte(scmd->result) == DID_NO_CONNECT)
4672                 return false;
4673
4674         device = scmd->device->hostdata;
4675         if (pqi_device_offline(device))
4676                 return false;
4677
4678         ctrl_info = shost_to_hba(scmd->device->host);
4679         if (pqi_ctrl_offline(ctrl_info))
4680                 return false;
4681
4682         return true;
4683 }
4684
4685 static inline void pqi_add_to_raid_bypass_retry_list(
4686         struct pqi_ctrl_info *ctrl_info,
4687         struct pqi_io_request *io_request, bool at_head)
4688 {
4689         unsigned long flags;
4690
4691         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4692         if (at_head)
4693                 list_add(&io_request->request_list_entry,
4694                         &ctrl_info->raid_bypass_retry_list);
4695         else
4696                 list_add_tail(&io_request->request_list_entry,
4697                         &ctrl_info->raid_bypass_retry_list);
4698         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4699 }
4700
4701 static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request,
4702         void *context)
4703 {
4704         struct scsi_cmnd *scmd;
4705
4706         scmd = io_request->scmd;
4707         pqi_free_io_request(io_request);
4708         pqi_scsi_done(scmd);
4709 }
4710
4711 static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request)
4712 {
4713         struct scsi_cmnd *scmd;
4714         struct pqi_ctrl_info *ctrl_info;
4715
4716         io_request->io_complete_callback = pqi_queued_raid_bypass_complete;
4717         scmd = io_request->scmd;
4718         scmd->result = 0;
4719         ctrl_info = shost_to_hba(scmd->device->host);
4720
4721         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false);
4722         pqi_schedule_bypass_retry(ctrl_info);
4723 }
4724
4725 static int pqi_retry_raid_bypass(struct pqi_io_request *io_request)
4726 {
4727         struct scsi_cmnd *scmd;
4728         struct pqi_scsi_dev *device;
4729         struct pqi_ctrl_info *ctrl_info;
4730         struct pqi_queue_group *queue_group;
4731
4732         scmd = io_request->scmd;
4733         device = scmd->device->hostdata;
4734         if (pqi_device_in_reset(device)) {
4735                 pqi_free_io_request(io_request);
4736                 set_host_byte(scmd, DID_RESET);
4737                 pqi_scsi_done(scmd);
4738                 return 0;
4739         }
4740
4741         ctrl_info = shost_to_hba(scmd->device->host);
4742         queue_group = io_request->queue_group;
4743
4744         pqi_reinit_io_request(io_request);
4745
4746         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4747                 device, scmd, queue_group);
4748 }
4749
4750 static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request(
4751         struct pqi_ctrl_info *ctrl_info)
4752 {
4753         unsigned long flags;
4754         struct pqi_io_request *io_request;
4755
4756         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4757         io_request = list_first_entry_or_null(
4758                 &ctrl_info->raid_bypass_retry_list,
4759                 struct pqi_io_request, request_list_entry);
4760         if (io_request)
4761                 list_del(&io_request->request_list_entry);
4762         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4763
4764         return io_request;
4765 }
4766
4767 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info)
4768 {
4769         int rc;
4770         struct pqi_io_request *io_request;
4771
4772         pqi_ctrl_busy(ctrl_info);
4773
4774         while (1) {
4775                 if (pqi_ctrl_blocked(ctrl_info))
4776                         break;
4777                 io_request = pqi_next_queued_raid_bypass_request(ctrl_info);
4778                 if (!io_request)
4779                         break;
4780                 rc = pqi_retry_raid_bypass(io_request);
4781                 if (rc) {
4782                         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request,
4783                                 true);
4784                         pqi_schedule_bypass_retry(ctrl_info);
4785                         break;
4786                 }
4787         }
4788
4789         pqi_ctrl_unbusy(ctrl_info);
4790 }
4791
4792 static void pqi_raid_bypass_retry_worker(struct work_struct *work)
4793 {
4794         struct pqi_ctrl_info *ctrl_info;
4795
4796         ctrl_info = container_of(work, struct pqi_ctrl_info,
4797                 raid_bypass_retry_work);
4798         pqi_retry_raid_bypass_requests(ctrl_info);
4799 }
4800
4801 static void pqi_clear_all_queued_raid_bypass_retries(
4802         struct pqi_ctrl_info *ctrl_info)
4803 {
4804         unsigned long flags;
4805
4806         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4807         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
4808         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4809 }
4810
4811 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
4812         void *context)
4813 {
4814         struct scsi_cmnd *scmd;
4815
4816         scmd = io_request->scmd;
4817         scsi_dma_unmap(scmd);
4818         if (io_request->status == -EAGAIN)
4819                 set_host_byte(scmd, DID_IMM_RETRY);
4820         else if (pqi_raid_bypass_retry_needed(io_request)) {
4821                 pqi_queue_raid_bypass_retry(io_request);
4822                 return;
4823         }
4824         pqi_free_io_request(io_request);
4825         pqi_scsi_done(scmd);
4826 }
4827
4828 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4829         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4830         struct pqi_queue_group *queue_group)
4831 {
4832         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
4833                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
4834 }
4835
4836 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
4837         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
4838         unsigned int cdb_length, struct pqi_queue_group *queue_group,
4839         struct pqi_encryption_info *encryption_info, bool raid_bypass)
4840 {
4841         int rc;
4842         struct pqi_io_request *io_request;
4843         struct pqi_aio_path_request *request;
4844
4845         io_request = pqi_alloc_io_request(ctrl_info);
4846         io_request->io_complete_callback = pqi_aio_io_complete;
4847         io_request->scmd = scmd;
4848         io_request->raid_bypass = raid_bypass;
4849
4850         request = io_request->iu;
4851         memset(request, 0,
4852                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4853
4854         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
4855         put_unaligned_le32(aio_handle, &request->nexus_id);
4856         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4857         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4858         put_unaligned_le16(io_request->index, &request->request_id);
4859         request->error_index = request->request_id;
4860         if (cdb_length > sizeof(request->cdb))
4861                 cdb_length = sizeof(request->cdb);
4862         request->cdb_length = cdb_length;
4863         memcpy(request->cdb, cdb, cdb_length);
4864
4865         switch (scmd->sc_data_direction) {
4866         case DMA_TO_DEVICE:
4867                 request->data_direction = SOP_READ_FLAG;
4868                 break;
4869         case DMA_FROM_DEVICE:
4870                 request->data_direction = SOP_WRITE_FLAG;
4871                 break;
4872         case DMA_NONE:
4873                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4874                 break;
4875         case DMA_BIDIRECTIONAL:
4876                 request->data_direction = SOP_BIDIRECTIONAL;
4877                 break;
4878         default:
4879                 dev_err(&ctrl_info->pci_dev->dev,
4880                         "unknown data direction: %d\n",
4881                         scmd->sc_data_direction);
4882                 break;
4883         }
4884
4885         if (encryption_info) {
4886                 request->encryption_enable = true;
4887                 put_unaligned_le16(encryption_info->data_encryption_key_index,
4888                         &request->data_encryption_key_index);
4889                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
4890                         &request->encrypt_tweak_lower);
4891                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
4892                         &request->encrypt_tweak_upper);
4893         }
4894
4895         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
4896         if (rc) {
4897                 pqi_free_io_request(io_request);
4898                 return SCSI_MLQUEUE_HOST_BUSY;
4899         }
4900
4901         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
4902
4903         return 0;
4904 }
4905
4906 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
4907         struct scsi_cmnd *scmd)
4908 {
4909         u16 hw_queue;
4910
4911         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
4912         if (hw_queue > ctrl_info->max_hw_queue_index)
4913                 hw_queue = 0;
4914
4915         return hw_queue;
4916 }
4917
4918 /*
4919  * This function gets called just before we hand the completed SCSI request
4920  * back to the SML.
4921  */
4922
4923 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
4924 {
4925         struct pqi_scsi_dev *device;
4926
4927         device = scmd->device->hostdata;
4928         atomic_dec(&device->scsi_cmds_outstanding);
4929 }
4930
4931 static int pqi_scsi_queue_command(struct Scsi_Host *shost,
4932         struct scsi_cmnd *scmd)
4933 {
4934         int rc;
4935         struct pqi_ctrl_info *ctrl_info;
4936         struct pqi_scsi_dev *device;
4937         u16 hw_queue;
4938         struct pqi_queue_group *queue_group;
4939         bool raid_bypassed;
4940
4941         device = scmd->device->hostdata;
4942         ctrl_info = shost_to_hba(shost);
4943
4944         atomic_inc(&device->scsi_cmds_outstanding);
4945
4946         if (pqi_ctrl_offline(ctrl_info)) {
4947                 set_host_byte(scmd, DID_NO_CONNECT);
4948                 pqi_scsi_done(scmd);
4949                 return 0;
4950         }
4951
4952         pqi_ctrl_busy(ctrl_info);
4953         if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device)) {
4954                 rc = SCSI_MLQUEUE_HOST_BUSY;
4955                 goto out;
4956         }
4957
4958         /*
4959          * This is necessary because the SML doesn't zero out this field during
4960          * error recovery.
4961          */
4962         scmd->result = 0;
4963
4964         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
4965         queue_group = &ctrl_info->queue_groups[hw_queue];
4966
4967         if (pqi_is_logical_device(device)) {
4968                 raid_bypassed = false;
4969                 if (device->raid_bypass_enabled &&
4970                                 !blk_rq_is_passthrough(scmd->request)) {
4971                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
4972                                 scmd, queue_group);
4973                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY)
4974                                 raid_bypassed = true;
4975                 }
4976                 if (!raid_bypassed)
4977                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
4978                                 queue_group);
4979         } else {
4980                 if (device->aio_enabled)
4981                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
4982                                 queue_group);
4983                 else
4984                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
4985                                 queue_group);
4986         }
4987
4988 out:
4989         pqi_ctrl_unbusy(ctrl_info);
4990         if (rc)
4991                 atomic_dec(&device->scsi_cmds_outstanding);
4992
4993         return rc;
4994 }
4995
4996 static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
4997         struct pqi_queue_group *queue_group)
4998 {
4999         unsigned int path;
5000         unsigned long flags;
5001         bool list_is_empty;
5002
5003         for (path = 0; path < 2; path++) {
5004                 while (1) {
5005                         spin_lock_irqsave(
5006                                 &queue_group->submit_lock[path], flags);
5007                         list_is_empty =
5008                                 list_empty(&queue_group->request_list[path]);
5009                         spin_unlock_irqrestore(
5010                                 &queue_group->submit_lock[path], flags);
5011                         if (list_is_empty)
5012                                 break;
5013                         pqi_check_ctrl_health(ctrl_info);
5014                         if (pqi_ctrl_offline(ctrl_info))
5015                                 return -ENXIO;
5016                         usleep_range(1000, 2000);
5017                 }
5018         }
5019
5020         return 0;
5021 }
5022
5023 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5024 {
5025         int rc;
5026         unsigned int i;
5027         unsigned int path;
5028         struct pqi_queue_group *queue_group;
5029         pqi_index_t iq_pi;
5030         pqi_index_t iq_ci;
5031
5032         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5033                 queue_group = &ctrl_info->queue_groups[i];
5034
5035                 rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5036                 if (rc)
5037                         return rc;
5038
5039                 for (path = 0; path < 2; path++) {
5040                         iq_pi = queue_group->iq_pi_copy[path];
5041
5042                         while (1) {
5043                                 iq_ci = *queue_group->iq_ci[path];
5044                                 if (iq_ci == iq_pi)
5045                                         break;
5046                                 pqi_check_ctrl_health(ctrl_info);
5047                                 if (pqi_ctrl_offline(ctrl_info))
5048                                         return -ENXIO;
5049                                 usleep_range(1000, 2000);
5050                         }
5051                 }
5052         }
5053
5054         return 0;
5055 }
5056
5057 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5058         struct pqi_scsi_dev *device)
5059 {
5060         unsigned int i;
5061         unsigned int path;
5062         struct pqi_queue_group *queue_group;
5063         unsigned long flags;
5064         struct pqi_io_request *io_request;
5065         struct pqi_io_request *next;
5066         struct scsi_cmnd *scmd;
5067         struct pqi_scsi_dev *scsi_device;
5068
5069         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5070                 queue_group = &ctrl_info->queue_groups[i];
5071
5072                 for (path = 0; path < 2; path++) {
5073                         spin_lock_irqsave(
5074                                 &queue_group->submit_lock[path], flags);
5075
5076                         list_for_each_entry_safe(io_request, next,
5077                                 &queue_group->request_list[path],
5078                                 request_list_entry) {
5079                                 scmd = io_request->scmd;
5080                                 if (!scmd)
5081                                         continue;
5082
5083                                 scsi_device = scmd->device->hostdata;
5084                                 if (scsi_device != device)
5085                                         continue;
5086
5087                                 list_del(&io_request->request_list_entry);
5088                                 set_host_byte(scmd, DID_RESET);
5089                                 pqi_scsi_done(scmd);
5090                         }
5091
5092                         spin_unlock_irqrestore(
5093                                 &queue_group->submit_lock[path], flags);
5094                 }
5095         }
5096 }
5097
5098 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5099         struct pqi_scsi_dev *device)
5100 {
5101         while (atomic_read(&device->scsi_cmds_outstanding)) {
5102                 pqi_check_ctrl_health(ctrl_info);
5103                 if (pqi_ctrl_offline(ctrl_info))
5104                         return -ENXIO;
5105                 usleep_range(1000, 2000);
5106         }
5107
5108         return 0;
5109 }
5110
5111 static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info)
5112 {
5113         bool io_pending;
5114         unsigned long flags;
5115         struct pqi_scsi_dev *device;
5116
5117         while (1) {
5118                 io_pending = false;
5119
5120                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5121                 list_for_each_entry(device, &ctrl_info->scsi_device_list,
5122                         scsi_device_list_entry) {
5123                         if (atomic_read(&device->scsi_cmds_outstanding)) {
5124                                 io_pending = true;
5125                                 break;
5126                         }
5127                 }
5128                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5129                                         flags);
5130
5131                 if (!io_pending)
5132                         break;
5133
5134                 pqi_check_ctrl_health(ctrl_info);
5135                 if (pqi_ctrl_offline(ctrl_info))
5136                         return -ENXIO;
5137
5138                 usleep_range(1000, 2000);
5139         }
5140
5141         return 0;
5142 }
5143
5144 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5145         void *context)
5146 {
5147         struct completion *waiting = context;
5148
5149         complete(waiting);
5150 }
5151
5152 #define PQI_LUN_RESET_TIMEOUT_SECS      10
5153
5154 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5155         struct pqi_scsi_dev *device, struct completion *wait)
5156 {
5157         int rc;
5158
5159         while (1) {
5160                 if (wait_for_completion_io_timeout(wait,
5161                         PQI_LUN_RESET_TIMEOUT_SECS * HZ)) {
5162                         rc = 0;
5163                         break;
5164                 }
5165
5166                 pqi_check_ctrl_health(ctrl_info);
5167                 if (pqi_ctrl_offline(ctrl_info)) {
5168                         rc = -ENXIO;
5169                         break;
5170                 }
5171         }
5172
5173         return rc;
5174 }
5175
5176 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
5177         struct pqi_scsi_dev *device)
5178 {
5179         int rc;
5180         struct pqi_io_request *io_request;
5181         DECLARE_COMPLETION_ONSTACK(wait);
5182         struct pqi_task_management_request *request;
5183
5184         io_request = pqi_alloc_io_request(ctrl_info);
5185         io_request->io_complete_callback = pqi_lun_reset_complete;
5186         io_request->context = &wait;
5187
5188         request = io_request->iu;
5189         memset(request, 0, sizeof(*request));
5190
5191         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5192         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5193                 &request->header.iu_length);
5194         put_unaligned_le16(io_request->index, &request->request_id);
5195         memcpy(request->lun_number, device->scsi3addr,
5196                 sizeof(request->lun_number));
5197         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5198
5199         pqi_start_io(ctrl_info,
5200                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5201                 io_request);
5202
5203         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5204         if (rc == 0)
5205                 rc = io_request->status;
5206
5207         pqi_free_io_request(io_request);
5208
5209         return rc;
5210 }
5211
5212 /* Performs a reset at the LUN level. */
5213
5214 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5215         struct pqi_scsi_dev *device)
5216 {
5217         int rc;
5218
5219         rc = pqi_lun_reset(ctrl_info, device);
5220         if (rc == 0)
5221                 rc = pqi_device_wait_for_pending_io(ctrl_info, device);
5222
5223         return rc == 0 ? SUCCESS : FAILED;
5224 }
5225
5226 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
5227 {
5228         int rc;
5229         struct Scsi_Host *shost;
5230         struct pqi_ctrl_info *ctrl_info;
5231         struct pqi_scsi_dev *device;
5232
5233         shost = scmd->device->host;
5234         ctrl_info = shost_to_hba(shost);
5235         device = scmd->device->hostdata;
5236
5237         dev_err(&ctrl_info->pci_dev->dev,
5238                 "resetting scsi %d:%d:%d:%d\n",
5239                 shost->host_no, device->bus, device->target, device->lun);
5240
5241         pqi_check_ctrl_health(ctrl_info);
5242         if (pqi_ctrl_offline(ctrl_info)) {
5243                 rc = FAILED;
5244                 goto out;
5245         }
5246
5247         mutex_lock(&ctrl_info->lun_reset_mutex);
5248
5249         pqi_ctrl_block_requests(ctrl_info);
5250         pqi_ctrl_wait_until_quiesced(ctrl_info);
5251         pqi_fail_io_queued_for_device(ctrl_info, device);
5252         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
5253         pqi_device_reset_start(device);
5254         pqi_ctrl_unblock_requests(ctrl_info);
5255
5256         if (rc)
5257                 rc = FAILED;
5258         else
5259                 rc = pqi_device_reset(ctrl_info, device);
5260
5261         pqi_device_reset_done(device);
5262
5263         mutex_unlock(&ctrl_info->lun_reset_mutex);
5264
5265 out:
5266         dev_err(&ctrl_info->pci_dev->dev,
5267                 "reset of scsi %d:%d:%d:%d: %s\n",
5268                 shost->host_no, device->bus, device->target, device->lun,
5269                 rc == SUCCESS ? "SUCCESS" : "FAILED");
5270
5271         return rc;
5272 }
5273
5274 static int pqi_slave_alloc(struct scsi_device *sdev)
5275 {
5276         struct pqi_scsi_dev *device;
5277         unsigned long flags;
5278         struct pqi_ctrl_info *ctrl_info;
5279         struct scsi_target *starget;
5280         struct sas_rphy *rphy;
5281
5282         ctrl_info = shost_to_hba(sdev->host);
5283
5284         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5285
5286         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
5287                 starget = scsi_target(sdev);
5288                 rphy = target_to_rphy(starget);
5289                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
5290                 if (device) {
5291                         device->target = sdev_id(sdev);
5292                         device->lun = sdev->lun;
5293                         device->target_lun_valid = true;
5294                 }
5295         } else {
5296                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
5297                         sdev_id(sdev), sdev->lun);
5298         }
5299
5300         if (device) {
5301                 sdev->hostdata = device;
5302                 device->sdev = sdev;
5303                 if (device->queue_depth) {
5304                         device->advertised_queue_depth = device->queue_depth;
5305                         scsi_change_queue_depth(sdev,
5306                                 device->advertised_queue_depth);
5307                 }
5308         }
5309
5310         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5311
5312         return 0;
5313 }
5314
5315 static int pqi_map_queues(struct Scsi_Host *shost)
5316 {
5317         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
5318
5319         return blk_mq_pci_map_queues(&shost->tag_set, ctrl_info->pci_dev, 0);
5320 }
5321
5322 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
5323         void __user *arg)
5324 {
5325         struct pci_dev *pci_dev;
5326         u32 subsystem_vendor;
5327         u32 subsystem_device;
5328         cciss_pci_info_struct pciinfo;
5329
5330         if (!arg)
5331                 return -EINVAL;
5332
5333         pci_dev = ctrl_info->pci_dev;
5334
5335         pciinfo.domain = pci_domain_nr(pci_dev->bus);
5336         pciinfo.bus = pci_dev->bus->number;
5337         pciinfo.dev_fn = pci_dev->devfn;
5338         subsystem_vendor = pci_dev->subsystem_vendor;
5339         subsystem_device = pci_dev->subsystem_device;
5340         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
5341                 subsystem_vendor;
5342
5343         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
5344                 return -EFAULT;
5345
5346         return 0;
5347 }
5348
5349 static int pqi_getdrivver_ioctl(void __user *arg)
5350 {
5351         u32 version;
5352
5353         if (!arg)
5354                 return -EINVAL;
5355
5356         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
5357                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
5358
5359         if (copy_to_user(arg, &version, sizeof(version)))
5360                 return -EFAULT;
5361
5362         return 0;
5363 }
5364
5365 struct ciss_error_info {
5366         u8      scsi_status;
5367         int     command_status;
5368         size_t  sense_data_length;
5369 };
5370
5371 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
5372         struct ciss_error_info *ciss_error_info)
5373 {
5374         int ciss_cmd_status;
5375         size_t sense_data_length;
5376
5377         switch (pqi_error_info->data_out_result) {
5378         case PQI_DATA_IN_OUT_GOOD:
5379                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
5380                 break;
5381         case PQI_DATA_IN_OUT_UNDERFLOW:
5382                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
5383                 break;
5384         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
5385                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
5386                 break;
5387         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
5388         case PQI_DATA_IN_OUT_BUFFER_ERROR:
5389         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
5390         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
5391         case PQI_DATA_IN_OUT_ERROR:
5392                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
5393                 break;
5394         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
5395         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
5396         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
5397         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
5398         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
5399         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
5400         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
5401         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
5402         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
5403         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
5404                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
5405                 break;
5406         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
5407                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
5408                 break;
5409         case PQI_DATA_IN_OUT_ABORTED:
5410                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
5411                 break;
5412         case PQI_DATA_IN_OUT_TIMEOUT:
5413                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
5414                 break;
5415         default:
5416                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
5417                 break;
5418         }
5419
5420         sense_data_length =
5421                 get_unaligned_le16(&pqi_error_info->sense_data_length);
5422         if (sense_data_length == 0)
5423                 sense_data_length =
5424                 get_unaligned_le16(&pqi_error_info->response_data_length);
5425         if (sense_data_length)
5426                 if (sense_data_length > sizeof(pqi_error_info->data))
5427                         sense_data_length = sizeof(pqi_error_info->data);
5428
5429         ciss_error_info->scsi_status = pqi_error_info->status;
5430         ciss_error_info->command_status = ciss_cmd_status;
5431         ciss_error_info->sense_data_length = sense_data_length;
5432 }
5433
5434 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5435 {
5436         int rc;
5437         char *kernel_buffer = NULL;
5438         u16 iu_length;
5439         size_t sense_data_length;
5440         IOCTL_Command_struct iocommand;
5441         struct pqi_raid_path_request request;
5442         struct pqi_raid_error_info pqi_error_info;
5443         struct ciss_error_info ciss_error_info;
5444
5445         if (pqi_ctrl_offline(ctrl_info))
5446                 return -ENXIO;
5447         if (!arg)
5448                 return -EINVAL;
5449         if (!capable(CAP_SYS_RAWIO))
5450                 return -EPERM;
5451         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
5452                 return -EFAULT;
5453         if (iocommand.buf_size < 1 &&
5454                 iocommand.Request.Type.Direction != XFER_NONE)
5455                 return -EINVAL;
5456         if (iocommand.Request.CDBLen > sizeof(request.cdb))
5457                 return -EINVAL;
5458         if (iocommand.Request.Type.Type != TYPE_CMD)
5459                 return -EINVAL;
5460
5461         switch (iocommand.Request.Type.Direction) {
5462         case XFER_NONE:
5463         case XFER_WRITE:
5464         case XFER_READ:
5465         case XFER_READ | XFER_WRITE:
5466                 break;
5467         default:
5468                 return -EINVAL;
5469         }
5470
5471         if (iocommand.buf_size > 0) {
5472                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
5473                 if (!kernel_buffer)
5474                         return -ENOMEM;
5475                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
5476                         if (copy_from_user(kernel_buffer, iocommand.buf,
5477                                 iocommand.buf_size)) {
5478                                 rc = -EFAULT;
5479                                 goto out;
5480                         }
5481                 } else {
5482                         memset(kernel_buffer, 0, iocommand.buf_size);
5483                 }
5484         }
5485
5486         memset(&request, 0, sizeof(request));
5487
5488         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5489         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5490                 PQI_REQUEST_HEADER_LENGTH;
5491         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
5492                 sizeof(request.lun_number));
5493         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
5494         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5495
5496         switch (iocommand.Request.Type.Direction) {
5497         case XFER_NONE:
5498                 request.data_direction = SOP_NO_DIRECTION_FLAG;
5499                 break;
5500         case XFER_WRITE:
5501                 request.data_direction = SOP_WRITE_FLAG;
5502                 break;
5503         case XFER_READ:
5504                 request.data_direction = SOP_READ_FLAG;
5505                 break;
5506         case XFER_READ | XFER_WRITE:
5507                 request.data_direction = SOP_BIDIRECTIONAL;
5508                 break;
5509         }
5510
5511         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5512
5513         if (iocommand.buf_size > 0) {
5514                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
5515
5516                 rc = pqi_map_single(ctrl_info->pci_dev,
5517                         &request.sg_descriptors[0], kernel_buffer,
5518                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
5519                 if (rc)
5520                         goto out;
5521
5522                 iu_length += sizeof(request.sg_descriptors[0]);
5523         }
5524
5525         put_unaligned_le16(iu_length, &request.header.iu_length);
5526
5527         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
5528                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
5529
5530         if (iocommand.buf_size > 0)
5531                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
5532                         PCI_DMA_BIDIRECTIONAL);
5533
5534         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
5535
5536         if (rc == 0) {
5537                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
5538                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
5539                 iocommand.error_info.CommandStatus =
5540                         ciss_error_info.command_status;
5541                 sense_data_length = ciss_error_info.sense_data_length;
5542                 if (sense_data_length) {
5543                         if (sense_data_length >
5544                                 sizeof(iocommand.error_info.SenseInfo))
5545                                 sense_data_length =
5546                                         sizeof(iocommand.error_info.SenseInfo);
5547                         memcpy(iocommand.error_info.SenseInfo,
5548                                 pqi_error_info.data, sense_data_length);
5549                         iocommand.error_info.SenseLen = sense_data_length;
5550                 }
5551         }
5552
5553         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
5554                 rc = -EFAULT;
5555                 goto out;
5556         }
5557
5558         if (rc == 0 && iocommand.buf_size > 0 &&
5559                 (iocommand.Request.Type.Direction & XFER_READ)) {
5560                 if (copy_to_user(iocommand.buf, kernel_buffer,
5561                         iocommand.buf_size)) {
5562                         rc = -EFAULT;
5563                 }
5564         }
5565
5566 out:
5567         kfree(kernel_buffer);
5568
5569         return rc;
5570 }
5571
5572 static int pqi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
5573 {
5574         int rc;
5575         struct pqi_ctrl_info *ctrl_info;
5576
5577         ctrl_info = shost_to_hba(sdev->host);
5578
5579         switch (cmd) {
5580         case CCISS_DEREGDISK:
5581         case CCISS_REGNEWDISK:
5582         case CCISS_REGNEWD:
5583                 rc = pqi_scan_scsi_devices(ctrl_info);
5584                 break;
5585         case CCISS_GETPCIINFO:
5586                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
5587                 break;
5588         case CCISS_GETDRIVVER:
5589                 rc = pqi_getdrivver_ioctl(arg);
5590                 break;
5591         case CCISS_PASSTHRU:
5592                 rc = pqi_passthru_ioctl(ctrl_info, arg);
5593                 break;
5594         default:
5595                 rc = -EINVAL;
5596                 break;
5597         }
5598
5599         return rc;
5600 }
5601
5602 static ssize_t pqi_version_show(struct device *dev,
5603         struct device_attribute *attr, char *buffer)
5604 {
5605         ssize_t count = 0;
5606         struct Scsi_Host *shost;
5607         struct pqi_ctrl_info *ctrl_info;
5608
5609         shost = class_to_shost(dev);
5610         ctrl_info = shost_to_hba(shost);
5611
5612         count += snprintf(buffer + count, PAGE_SIZE - count,
5613                 "  driver: %s\n", DRIVER_VERSION BUILD_TIMESTAMP);
5614
5615         count += snprintf(buffer + count, PAGE_SIZE - count,
5616                 "firmware: %s\n", ctrl_info->firmware_version);
5617
5618         return count;
5619 }
5620
5621 static ssize_t pqi_host_rescan_store(struct device *dev,
5622         struct device_attribute *attr, const char *buffer, size_t count)
5623 {
5624         struct Scsi_Host *shost = class_to_shost(dev);
5625
5626         pqi_scan_start(shost);
5627
5628         return count;
5629 }
5630
5631 static ssize_t pqi_lockup_action_show(struct device *dev,
5632         struct device_attribute *attr, char *buffer)
5633 {
5634         int count = 0;
5635         unsigned int i;
5636
5637         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5638                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
5639                         count += snprintf(buffer + count, PAGE_SIZE - count,
5640                                 "[%s] ", pqi_lockup_actions[i].name);
5641                 else
5642                         count += snprintf(buffer + count, PAGE_SIZE - count,
5643                                 "%s ", pqi_lockup_actions[i].name);
5644         }
5645
5646         count += snprintf(buffer + count, PAGE_SIZE - count, "\n");
5647
5648         return count;
5649 }
5650
5651 static ssize_t pqi_lockup_action_store(struct device *dev,
5652         struct device_attribute *attr, const char *buffer, size_t count)
5653 {
5654         unsigned int i;
5655         char *action_name;
5656         char action_name_buffer[32];
5657
5658         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
5659         action_name = strstrip(action_name_buffer);
5660
5661         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5662                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
5663                         pqi_lockup_action = pqi_lockup_actions[i].action;
5664                         return count;
5665                 }
5666         }
5667
5668         return -EINVAL;
5669 }
5670
5671 static DEVICE_ATTR(version, 0444, pqi_version_show, NULL);
5672 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
5673 static DEVICE_ATTR(lockup_action, 0644,
5674         pqi_lockup_action_show, pqi_lockup_action_store);
5675
5676 static struct device_attribute *pqi_shost_attrs[] = {
5677         &dev_attr_version,
5678         &dev_attr_rescan,
5679         &dev_attr_lockup_action,
5680         NULL
5681 };
5682
5683 static ssize_t pqi_sas_address_show(struct device *dev,
5684         struct device_attribute *attr, char *buffer)
5685 {
5686         struct pqi_ctrl_info *ctrl_info;
5687         struct scsi_device *sdev;
5688         struct pqi_scsi_dev *device;
5689         unsigned long flags;
5690         u64 sas_address;
5691
5692         sdev = to_scsi_device(dev);
5693         ctrl_info = shost_to_hba(sdev->host);
5694
5695         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5696
5697         device = sdev->hostdata;
5698         if (pqi_is_logical_device(device)) {
5699                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5700                         flags);
5701                 return -ENODEV;
5702         }
5703         sas_address = device->sas_address;
5704
5705         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5706
5707         return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
5708 }
5709
5710 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
5711         struct device_attribute *attr, char *buffer)
5712 {
5713         struct pqi_ctrl_info *ctrl_info;
5714         struct scsi_device *sdev;
5715         struct pqi_scsi_dev *device;
5716         unsigned long flags;
5717
5718         sdev = to_scsi_device(dev);
5719         ctrl_info = shost_to_hba(sdev->host);
5720
5721         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5722
5723         device = sdev->hostdata;
5724         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
5725         buffer[1] = '\n';
5726         buffer[2] = '\0';
5727
5728         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5729
5730         return 2;
5731 }
5732
5733 static ssize_t pqi_raid_level_show(struct device *dev,
5734         struct device_attribute *attr, char *buffer)
5735 {
5736         struct pqi_ctrl_info *ctrl_info;
5737         struct scsi_device *sdev;
5738         struct pqi_scsi_dev *device;
5739         unsigned long flags;
5740         char *raid_level;
5741
5742         sdev = to_scsi_device(dev);
5743         ctrl_info = shost_to_hba(sdev->host);
5744
5745         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5746
5747         device = sdev->hostdata;
5748
5749         if (pqi_is_logical_device(device))
5750                 raid_level = pqi_raid_level_to_string(device->raid_level);
5751         else
5752                 raid_level = "N/A";
5753
5754         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5755
5756         return snprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
5757 }
5758
5759 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
5760 static DEVICE_ATTR(ssd_smart_path_enabled, 0444,
5761         pqi_ssd_smart_path_enabled_show, NULL);
5762 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
5763
5764 static struct device_attribute *pqi_sdev_attrs[] = {
5765         &dev_attr_sas_address,
5766         &dev_attr_ssd_smart_path_enabled,
5767         &dev_attr_raid_level,
5768         NULL
5769 };
5770
5771 static struct scsi_host_template pqi_driver_template = {
5772         .module = THIS_MODULE,
5773         .name = DRIVER_NAME_SHORT,
5774         .proc_name = DRIVER_NAME_SHORT,
5775         .queuecommand = pqi_scsi_queue_command,
5776         .scan_start = pqi_scan_start,
5777         .scan_finished = pqi_scan_finished,
5778         .this_id = -1,
5779         .use_clustering = ENABLE_CLUSTERING,
5780         .eh_device_reset_handler = pqi_eh_device_reset_handler,
5781         .ioctl = pqi_ioctl,
5782         .slave_alloc = pqi_slave_alloc,
5783         .map_queues = pqi_map_queues,
5784         .sdev_attrs = pqi_sdev_attrs,
5785         .shost_attrs = pqi_shost_attrs,
5786 };
5787
5788 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
5789 {
5790         int rc;
5791         struct Scsi_Host *shost;
5792
5793         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
5794         if (!shost) {
5795                 dev_err(&ctrl_info->pci_dev->dev,
5796                         "scsi_host_alloc failed for controller %u\n",
5797                         ctrl_info->ctrl_id);
5798                 return -ENOMEM;
5799         }
5800
5801         shost->io_port = 0;
5802         shost->n_io_port = 0;
5803         shost->this_id = -1;
5804         shost->max_channel = PQI_MAX_BUS;
5805         shost->max_cmd_len = MAX_COMMAND_SIZE;
5806         shost->max_lun = ~0;
5807         shost->max_id = ~0;
5808         shost->max_sectors = ctrl_info->max_sectors;
5809         shost->can_queue = ctrl_info->scsi_ml_can_queue;
5810         shost->cmd_per_lun = shost->can_queue;
5811         shost->sg_tablesize = ctrl_info->sg_tablesize;
5812         shost->transportt = pqi_sas_transport_template;
5813         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
5814         shost->unique_id = shost->irq;
5815         shost->nr_hw_queues = ctrl_info->num_queue_groups;
5816         shost->hostdata[0] = (unsigned long)ctrl_info;
5817
5818         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
5819         if (rc) {
5820                 dev_err(&ctrl_info->pci_dev->dev,
5821                         "scsi_add_host failed for controller %u\n",
5822                         ctrl_info->ctrl_id);
5823                 goto free_host;
5824         }
5825
5826         rc = pqi_add_sas_host(shost, ctrl_info);
5827         if (rc) {
5828                 dev_err(&ctrl_info->pci_dev->dev,
5829                         "add SAS host failed for controller %u\n",
5830                         ctrl_info->ctrl_id);
5831                 goto remove_host;
5832         }
5833
5834         ctrl_info->scsi_host = shost;
5835
5836         return 0;
5837
5838 remove_host:
5839         scsi_remove_host(shost);
5840 free_host:
5841         scsi_host_put(shost);
5842
5843         return rc;
5844 }
5845
5846 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
5847 {
5848         struct Scsi_Host *shost;
5849
5850         pqi_delete_sas_host(ctrl_info);
5851
5852         shost = ctrl_info->scsi_host;
5853         if (!shost)
5854                 return;
5855
5856         scsi_remove_host(shost);
5857         scsi_host_put(shost);
5858 }
5859
5860 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
5861 {
5862         int rc = 0;
5863         struct pqi_device_registers __iomem *pqi_registers;
5864         unsigned long timeout;
5865         unsigned int timeout_msecs;
5866         union pqi_reset_register reset_reg;
5867
5868         pqi_registers = ctrl_info->pqi_registers;
5869         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
5870         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
5871
5872         while (1) {
5873                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
5874                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
5875                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
5876                         break;
5877                 pqi_check_ctrl_health(ctrl_info);
5878                 if (pqi_ctrl_offline(ctrl_info)) {
5879                         rc = -ENXIO;
5880                         break;
5881                 }
5882                 if (time_after(jiffies, timeout)) {
5883                         rc = -ETIMEDOUT;
5884                         break;
5885                 }
5886         }
5887
5888         return rc;
5889 }
5890
5891 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
5892 {
5893         int rc;
5894         union pqi_reset_register reset_reg;
5895
5896         if (ctrl_info->pqi_reset_quiesce_supported) {
5897                 rc = sis_pqi_reset_quiesce(ctrl_info);
5898                 if (rc) {
5899                         dev_err(&ctrl_info->pci_dev->dev,
5900                                 "PQI reset failed during quiesce with error %d\n",
5901                                 rc);
5902                         return rc;
5903                 }
5904         }
5905
5906         reset_reg.all_bits = 0;
5907         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
5908         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
5909
5910         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
5911
5912         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
5913         if (rc)
5914                 dev_err(&ctrl_info->pci_dev->dev,
5915                         "PQI reset failed with error %d\n", rc);
5916
5917         return rc;
5918 }
5919
5920 static int pqi_get_ctrl_firmware_version(struct pqi_ctrl_info *ctrl_info)
5921 {
5922         int rc;
5923         struct bmic_identify_controller *identify;
5924
5925         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
5926         if (!identify)
5927                 return -ENOMEM;
5928
5929         rc = pqi_identify_controller(ctrl_info, identify);
5930         if (rc)
5931                 goto out;
5932
5933         memcpy(ctrl_info->firmware_version, identify->firmware_version,
5934                 sizeof(identify->firmware_version));
5935         ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
5936         snprintf(ctrl_info->firmware_version +
5937                 strlen(ctrl_info->firmware_version),
5938                 sizeof(ctrl_info->firmware_version),
5939                 "-%u", get_unaligned_le16(&identify->firmware_build_number));
5940
5941 out:
5942         kfree(identify);
5943
5944         return rc;
5945 }
5946
5947 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
5948 {
5949         u32 table_length;
5950         u32 section_offset;
5951         void __iomem *table_iomem_addr;
5952         struct pqi_config_table *config_table;
5953         struct pqi_config_table_section_header *section;
5954
5955         table_length = ctrl_info->config_table_length;
5956
5957         config_table = kmalloc(table_length, GFP_KERNEL);
5958         if (!config_table) {
5959                 dev_err(&ctrl_info->pci_dev->dev,
5960                         "failed to allocate memory for PQI configuration table\n");
5961                 return -ENOMEM;
5962         }
5963
5964         /*
5965          * Copy the config table contents from I/O memory space into the
5966          * temporary buffer.
5967          */
5968         table_iomem_addr = ctrl_info->iomem_base +
5969                 ctrl_info->config_table_offset;
5970         memcpy_fromio(config_table, table_iomem_addr, table_length);
5971
5972         section_offset =
5973                 get_unaligned_le32(&config_table->first_section_offset);
5974
5975         while (section_offset) {
5976                 section = (void *)config_table + section_offset;
5977
5978                 switch (get_unaligned_le16(&section->section_id)) {
5979                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
5980                         if (pqi_disable_heartbeat)
5981                                 dev_warn(&ctrl_info->pci_dev->dev,
5982                                 "heartbeat disabled by module parameter\n");
5983                         else
5984                                 ctrl_info->heartbeat_counter =
5985                                         table_iomem_addr +
5986                                         section_offset +
5987                                         offsetof(
5988                                         struct pqi_config_table_heartbeat,
5989                                                 heartbeat_counter);
5990                         break;
5991                 }
5992
5993                 section_offset =
5994                         get_unaligned_le16(&section->next_section_offset);
5995         }
5996
5997         kfree(config_table);
5998
5999         return 0;
6000 }
6001
6002 /* Switches the controller from PQI mode back into SIS mode. */
6003
6004 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
6005 {
6006         int rc;
6007
6008         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
6009         rc = pqi_reset(ctrl_info);
6010         if (rc)
6011                 return rc;
6012         rc = sis_reenable_sis_mode(ctrl_info);
6013         if (rc) {
6014                 dev_err(&ctrl_info->pci_dev->dev,
6015                         "re-enabling SIS mode failed with error %d\n", rc);
6016                 return rc;
6017         }
6018         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6019
6020         return 0;
6021 }
6022
6023 /*
6024  * If the controller isn't already in SIS mode, this function forces it into
6025  * SIS mode.
6026  */
6027
6028 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
6029 {
6030         if (!sis_is_firmware_running(ctrl_info))
6031                 return -ENXIO;
6032
6033         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
6034                 return 0;
6035
6036         if (sis_is_kernel_up(ctrl_info)) {
6037                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6038                 return 0;
6039         }
6040
6041         return pqi_revert_to_sis_mode(ctrl_info);
6042 }
6043
6044 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
6045 {
6046         int rc;
6047
6048         rc = pqi_force_sis_mode(ctrl_info);
6049         if (rc)
6050                 return rc;
6051
6052         /*
6053          * Wait until the controller is ready to start accepting SIS
6054          * commands.
6055          */
6056         rc = sis_wait_for_ctrl_ready(ctrl_info);
6057         if (rc)
6058                 return rc;
6059
6060         /*
6061          * Get the controller properties.  This allows us to determine
6062          * whether or not it supports PQI mode.
6063          */
6064         rc = sis_get_ctrl_properties(ctrl_info);
6065         if (rc) {
6066                 dev_err(&ctrl_info->pci_dev->dev,
6067                         "error obtaining controller properties\n");
6068                 return rc;
6069         }
6070
6071         rc = sis_get_pqi_capabilities(ctrl_info);
6072         if (rc) {
6073                 dev_err(&ctrl_info->pci_dev->dev,
6074                         "error obtaining controller capabilities\n");
6075                 return rc;
6076         }
6077
6078         if (reset_devices) {
6079                 if (ctrl_info->max_outstanding_requests >
6080                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
6081                         ctrl_info->max_outstanding_requests =
6082                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
6083         } else {
6084                 if (ctrl_info->max_outstanding_requests >
6085                         PQI_MAX_OUTSTANDING_REQUESTS)
6086                         ctrl_info->max_outstanding_requests =
6087                                         PQI_MAX_OUTSTANDING_REQUESTS;
6088         }
6089
6090         pqi_calculate_io_resources(ctrl_info);
6091
6092         rc = pqi_alloc_error_buffer(ctrl_info);
6093         if (rc) {
6094                 dev_err(&ctrl_info->pci_dev->dev,
6095                         "failed to allocate PQI error buffer\n");
6096                 return rc;
6097         }
6098
6099         /*
6100          * If the function we are about to call succeeds, the
6101          * controller will transition from legacy SIS mode
6102          * into PQI mode.
6103          */
6104         rc = sis_init_base_struct_addr(ctrl_info);
6105         if (rc) {
6106                 dev_err(&ctrl_info->pci_dev->dev,
6107                         "error initializing PQI mode\n");
6108                 return rc;
6109         }
6110
6111         /* Wait for the controller to complete the SIS -> PQI transition. */
6112         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6113         if (rc) {
6114                 dev_err(&ctrl_info->pci_dev->dev,
6115                         "transition to PQI mode failed\n");
6116                 return rc;
6117         }
6118
6119         /* From here on, we are running in PQI mode. */
6120         ctrl_info->pqi_mode_enabled = true;
6121         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6122
6123         rc = pqi_process_config_table(ctrl_info);
6124         if (rc)
6125                 return rc;
6126
6127         rc = pqi_alloc_admin_queues(ctrl_info);
6128         if (rc) {
6129                 dev_err(&ctrl_info->pci_dev->dev,
6130                         "failed to allocate admin queues\n");
6131                 return rc;
6132         }
6133
6134         rc = pqi_create_admin_queues(ctrl_info);
6135         if (rc) {
6136                 dev_err(&ctrl_info->pci_dev->dev,
6137                         "error creating admin queues\n");
6138                 return rc;
6139         }
6140
6141         rc = pqi_report_device_capability(ctrl_info);
6142         if (rc) {
6143                 dev_err(&ctrl_info->pci_dev->dev,
6144                         "obtaining device capability failed\n");
6145                 return rc;
6146         }
6147
6148         rc = pqi_validate_device_capability(ctrl_info);
6149         if (rc)
6150                 return rc;
6151
6152         pqi_calculate_queue_resources(ctrl_info);
6153
6154         rc = pqi_enable_msix_interrupts(ctrl_info);
6155         if (rc)
6156                 return rc;
6157
6158         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
6159                 ctrl_info->max_msix_vectors =
6160                         ctrl_info->num_msix_vectors_enabled;
6161                 pqi_calculate_queue_resources(ctrl_info);
6162         }
6163
6164         rc = pqi_alloc_io_resources(ctrl_info);
6165         if (rc)
6166                 return rc;
6167
6168         rc = pqi_alloc_operational_queues(ctrl_info);
6169         if (rc) {
6170                 dev_err(&ctrl_info->pci_dev->dev,
6171                         "failed to allocate operational queues\n");
6172                 return rc;
6173         }
6174
6175         pqi_init_operational_queues(ctrl_info);
6176
6177         rc = pqi_request_irqs(ctrl_info);
6178         if (rc)
6179                 return rc;
6180
6181         rc = pqi_create_queues(ctrl_info);
6182         if (rc)
6183                 return rc;
6184
6185         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6186
6187         ctrl_info->controller_online = true;
6188         pqi_start_heartbeat_timer(ctrl_info);
6189
6190         rc = pqi_enable_events(ctrl_info);
6191         if (rc) {
6192                 dev_err(&ctrl_info->pci_dev->dev,
6193                         "error enabling events\n");
6194                 return rc;
6195         }
6196
6197         /* Register with the SCSI subsystem. */
6198         rc = pqi_register_scsi(ctrl_info);
6199         if (rc)
6200                 return rc;
6201
6202         rc = pqi_get_ctrl_firmware_version(ctrl_info);
6203         if (rc) {
6204                 dev_err(&ctrl_info->pci_dev->dev,
6205                         "error obtaining firmware version\n");
6206                 return rc;
6207         }
6208
6209         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6210         if (rc) {
6211                 dev_err(&ctrl_info->pci_dev->dev,
6212                         "error updating host wellness\n");
6213                 return rc;
6214         }
6215
6216         pqi_schedule_update_time_worker(ctrl_info);
6217
6218         pqi_scan_scsi_devices(ctrl_info);
6219
6220         return 0;
6221 }
6222
6223 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
6224 {
6225         unsigned int i;
6226         struct pqi_admin_queues *admin_queues;
6227         struct pqi_event_queue *event_queue;
6228
6229         admin_queues = &ctrl_info->admin_queues;
6230         admin_queues->iq_pi_copy = 0;
6231         admin_queues->oq_ci_copy = 0;
6232         *admin_queues->oq_pi = 0;
6233
6234         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6235                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
6236                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
6237                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
6238
6239                 *ctrl_info->queue_groups[i].iq_ci[RAID_PATH] = 0;
6240                 *ctrl_info->queue_groups[i].iq_ci[AIO_PATH] = 0;
6241                 *ctrl_info->queue_groups[i].oq_pi = 0;
6242         }
6243
6244         event_queue = &ctrl_info->event_queue;
6245         *event_queue->oq_pi = 0;
6246         event_queue->oq_ci_copy = 0;
6247 }
6248
6249 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
6250 {
6251         int rc;
6252
6253         rc = pqi_force_sis_mode(ctrl_info);
6254         if (rc)
6255                 return rc;
6256
6257         /*
6258          * Wait until the controller is ready to start accepting SIS
6259          * commands.
6260          */
6261         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
6262         if (rc)
6263                 return rc;
6264
6265         /*
6266          * If the function we are about to call succeeds, the
6267          * controller will transition from legacy SIS mode
6268          * into PQI mode.
6269          */
6270         rc = sis_init_base_struct_addr(ctrl_info);
6271         if (rc) {
6272                 dev_err(&ctrl_info->pci_dev->dev,
6273                         "error initializing PQI mode\n");
6274                 return rc;
6275         }
6276
6277         /* Wait for the controller to complete the SIS -> PQI transition. */
6278         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6279         if (rc) {
6280                 dev_err(&ctrl_info->pci_dev->dev,
6281                         "transition to PQI mode failed\n");
6282                 return rc;
6283         }
6284
6285         /* From here on, we are running in PQI mode. */
6286         ctrl_info->pqi_mode_enabled = true;
6287         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6288
6289         pqi_reinit_queues(ctrl_info);
6290
6291         rc = pqi_create_admin_queues(ctrl_info);
6292         if (rc) {
6293                 dev_err(&ctrl_info->pci_dev->dev,
6294                         "error creating admin queues\n");
6295                 return rc;
6296         }
6297
6298         rc = pqi_create_queues(ctrl_info);
6299         if (rc)
6300                 return rc;
6301
6302         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6303
6304         ctrl_info->controller_online = true;
6305         pqi_start_heartbeat_timer(ctrl_info);
6306         pqi_ctrl_unblock_requests(ctrl_info);
6307
6308         rc = pqi_enable_events(ctrl_info);
6309         if (rc) {
6310                 dev_err(&ctrl_info->pci_dev->dev,
6311                         "error enabling events\n");
6312                 return rc;
6313         }
6314
6315         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6316         if (rc) {
6317                 dev_err(&ctrl_info->pci_dev->dev,
6318                         "error updating host wellness\n");
6319                 return rc;
6320         }
6321
6322         pqi_schedule_update_time_worker(ctrl_info);
6323
6324         pqi_scan_scsi_devices(ctrl_info);
6325
6326         return 0;
6327 }
6328
6329 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev,
6330         u16 timeout)
6331 {
6332         return pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
6333                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
6334 }
6335
6336 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
6337 {
6338         int rc;
6339         u64 mask;
6340
6341         rc = pci_enable_device(ctrl_info->pci_dev);
6342         if (rc) {
6343                 dev_err(&ctrl_info->pci_dev->dev,
6344                         "failed to enable PCI device\n");
6345                 return rc;
6346         }
6347
6348         if (sizeof(dma_addr_t) > 4)
6349                 mask = DMA_BIT_MASK(64);
6350         else
6351                 mask = DMA_BIT_MASK(32);
6352
6353         rc = dma_set_mask(&ctrl_info->pci_dev->dev, mask);
6354         if (rc) {
6355                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
6356                 goto disable_device;
6357         }
6358
6359         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
6360         if (rc) {
6361                 dev_err(&ctrl_info->pci_dev->dev,
6362                         "failed to obtain PCI resources\n");
6363                 goto disable_device;
6364         }
6365
6366         ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
6367                 ctrl_info->pci_dev, 0),
6368                 sizeof(struct pqi_ctrl_registers));
6369         if (!ctrl_info->iomem_base) {
6370                 dev_err(&ctrl_info->pci_dev->dev,
6371                         "failed to map memory for controller registers\n");
6372                 rc = -ENOMEM;
6373                 goto release_regions;
6374         }
6375
6376 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
6377
6378         /* Increase the PCIe completion timeout. */
6379         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
6380                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
6381         if (rc) {
6382                 dev_err(&ctrl_info->pci_dev->dev,
6383                         "failed to set PCIe completion timeout\n");
6384                 goto release_regions;
6385         }
6386
6387         /* Enable bus mastering. */
6388         pci_set_master(ctrl_info->pci_dev);
6389
6390         ctrl_info->registers = ctrl_info->iomem_base;
6391         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
6392
6393         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
6394
6395         return 0;
6396
6397 release_regions:
6398         pci_release_regions(ctrl_info->pci_dev);
6399 disable_device:
6400         pci_disable_device(ctrl_info->pci_dev);
6401
6402         return rc;
6403 }
6404
6405 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
6406 {
6407         iounmap(ctrl_info->iomem_base);
6408         pci_release_regions(ctrl_info->pci_dev);
6409         if (pci_is_enabled(ctrl_info->pci_dev))
6410                 pci_disable_device(ctrl_info->pci_dev);
6411         pci_set_drvdata(ctrl_info->pci_dev, NULL);
6412 }
6413
6414 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
6415 {
6416         struct pqi_ctrl_info *ctrl_info;
6417
6418         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
6419                         GFP_KERNEL, numa_node);
6420         if (!ctrl_info)
6421                 return NULL;
6422
6423         mutex_init(&ctrl_info->scan_mutex);
6424         mutex_init(&ctrl_info->lun_reset_mutex);
6425
6426         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
6427         spin_lock_init(&ctrl_info->scsi_device_list_lock);
6428
6429         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
6430         atomic_set(&ctrl_info->num_interrupts, 0);
6431
6432         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
6433         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
6434
6435         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
6436         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
6437
6438         sema_init(&ctrl_info->sync_request_sem,
6439                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
6440         init_waitqueue_head(&ctrl_info->block_requests_wait);
6441
6442         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
6443         spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock);
6444         INIT_WORK(&ctrl_info->raid_bypass_retry_work,
6445                 pqi_raid_bypass_retry_worker);
6446
6447         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
6448         ctrl_info->irq_mode = IRQ_MODE_NONE;
6449         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
6450
6451         return ctrl_info;
6452 }
6453
6454 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
6455 {
6456         kfree(ctrl_info);
6457 }
6458
6459 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
6460 {
6461         pqi_free_irqs(ctrl_info);
6462         pqi_disable_msix_interrupts(ctrl_info);
6463 }
6464
6465 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
6466 {
6467         pqi_stop_heartbeat_timer(ctrl_info);
6468         pqi_free_interrupts(ctrl_info);
6469         if (ctrl_info->queue_memory_base)
6470                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6471                         ctrl_info->queue_memory_length,
6472                         ctrl_info->queue_memory_base,
6473                         ctrl_info->queue_memory_base_dma_handle);
6474         if (ctrl_info->admin_queue_memory_base)
6475                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6476                         ctrl_info->admin_queue_memory_length,
6477                         ctrl_info->admin_queue_memory_base,
6478                         ctrl_info->admin_queue_memory_base_dma_handle);
6479         pqi_free_all_io_requests(ctrl_info);
6480         if (ctrl_info->error_buffer)
6481                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6482                         ctrl_info->error_buffer_length,
6483                         ctrl_info->error_buffer,
6484                         ctrl_info->error_buffer_dma_handle);
6485         if (ctrl_info->iomem_base)
6486                 pqi_cleanup_pci_init(ctrl_info);
6487         pqi_free_ctrl_info(ctrl_info);
6488 }
6489
6490 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
6491 {
6492         pqi_cancel_rescan_worker(ctrl_info);
6493         pqi_cancel_update_time_worker(ctrl_info);
6494         pqi_remove_all_scsi_devices(ctrl_info);
6495         pqi_unregister_scsi(ctrl_info);
6496         if (ctrl_info->pqi_mode_enabled)
6497                 pqi_revert_to_sis_mode(ctrl_info);
6498         pqi_free_ctrl_resources(ctrl_info);
6499 }
6500
6501 static void pqi_perform_lockup_action(void)
6502 {
6503         switch (pqi_lockup_action) {
6504         case PANIC:
6505                 panic("FATAL: Smart Family Controller lockup detected");
6506                 break;
6507         case REBOOT:
6508                 emergency_restart();
6509                 break;
6510         case NONE:
6511         default:
6512                 break;
6513         }
6514 }
6515
6516 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
6517         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
6518         .status = SAM_STAT_CHECK_CONDITION,
6519 };
6520
6521 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
6522 {
6523         unsigned int i;
6524         struct pqi_io_request *io_request;
6525         struct scsi_cmnd *scmd;
6526
6527         for (i = 0; i < ctrl_info->max_io_slots; i++) {
6528                 io_request = &ctrl_info->io_request_pool[i];
6529                 if (atomic_read(&io_request->refcount) == 0)
6530                         continue;
6531
6532                 scmd = io_request->scmd;
6533                 if (scmd) {
6534                         set_host_byte(scmd, DID_NO_CONNECT);
6535                 } else {
6536                         io_request->status = -ENXIO;
6537                         io_request->error_info =
6538                                 &pqi_ctrl_offline_raid_error_info;
6539                 }
6540
6541                 io_request->io_complete_callback(io_request,
6542                         io_request->context);
6543         }
6544 }
6545
6546 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
6547 {
6548         pqi_perform_lockup_action();
6549         pqi_stop_heartbeat_timer(ctrl_info);
6550         pqi_free_interrupts(ctrl_info);
6551         pqi_cancel_rescan_worker(ctrl_info);
6552         pqi_cancel_update_time_worker(ctrl_info);
6553         pqi_ctrl_wait_until_quiesced(ctrl_info);
6554         pqi_fail_all_outstanding_requests(ctrl_info);
6555         pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
6556         pqi_ctrl_unblock_requests(ctrl_info);
6557 }
6558
6559 static void pqi_ctrl_offline_worker(struct work_struct *work)
6560 {
6561         struct pqi_ctrl_info *ctrl_info;
6562
6563         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
6564         pqi_take_ctrl_offline_deferred(ctrl_info);
6565 }
6566
6567 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
6568 {
6569         if (!ctrl_info->controller_online)
6570                 return;
6571
6572         ctrl_info->controller_online = false;
6573         ctrl_info->pqi_mode_enabled = false;
6574         pqi_ctrl_block_requests(ctrl_info);
6575         if (!pqi_disable_ctrl_shutdown)
6576                 sis_shutdown_ctrl(ctrl_info);
6577         pci_disable_device(ctrl_info->pci_dev);
6578         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
6579         schedule_work(&ctrl_info->ctrl_offline_work);
6580 }
6581
6582 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
6583         const struct pci_device_id *id)
6584 {
6585         char *ctrl_description;
6586
6587         if (id->driver_data)
6588                 ctrl_description = (char *)id->driver_data;
6589         else
6590                 ctrl_description = "Microsemi Smart Family Controller";
6591
6592         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
6593 }
6594
6595 static int pqi_pci_probe(struct pci_dev *pci_dev,
6596         const struct pci_device_id *id)
6597 {
6598         int rc;
6599         int node;
6600         struct pqi_ctrl_info *ctrl_info;
6601
6602         pqi_print_ctrl_info(pci_dev, id);
6603
6604         if (pqi_disable_device_id_wildcards &&
6605                 id->subvendor == PCI_ANY_ID &&
6606                 id->subdevice == PCI_ANY_ID) {
6607                 dev_warn(&pci_dev->dev,
6608                         "controller not probed because device ID wildcards are disabled\n");
6609                 return -ENODEV;
6610         }
6611
6612         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
6613                 dev_warn(&pci_dev->dev,
6614                         "controller device ID matched using wildcards\n");
6615
6616         node = dev_to_node(&pci_dev->dev);
6617         if (node == NUMA_NO_NODE)
6618                 set_dev_node(&pci_dev->dev, 0);
6619
6620         ctrl_info = pqi_alloc_ctrl_info(node);
6621         if (!ctrl_info) {
6622                 dev_err(&pci_dev->dev,
6623                         "failed to allocate controller info block\n");
6624                 return -ENOMEM;
6625         }
6626
6627         ctrl_info->pci_dev = pci_dev;
6628
6629         rc = pqi_pci_init(ctrl_info);
6630         if (rc)
6631                 goto error;
6632
6633         rc = pqi_ctrl_init(ctrl_info);
6634         if (rc)
6635                 goto error;
6636
6637         return 0;
6638
6639 error:
6640         pqi_remove_ctrl(ctrl_info);
6641
6642         return rc;
6643 }
6644
6645 static void pqi_pci_remove(struct pci_dev *pci_dev)
6646 {
6647         struct pqi_ctrl_info *ctrl_info;
6648
6649         ctrl_info = pci_get_drvdata(pci_dev);
6650         if (!ctrl_info)
6651                 return;
6652
6653         pqi_remove_ctrl(ctrl_info);
6654 }
6655
6656 static void pqi_shutdown(struct pci_dev *pci_dev)
6657 {
6658         int rc;
6659         struct pqi_ctrl_info *ctrl_info;
6660
6661         ctrl_info = pci_get_drvdata(pci_dev);
6662         if (!ctrl_info)
6663                 goto error;
6664
6665         /*
6666          * Write all data in the controller's battery-backed cache to
6667          * storage.
6668          */
6669         rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
6670         pqi_reset(ctrl_info);
6671         if (rc == 0)
6672                 return;
6673
6674 error:
6675         dev_warn(&pci_dev->dev,
6676                 "unable to flush controller cache\n");
6677 }
6678
6679 static void pqi_process_lockup_action_param(void)
6680 {
6681         unsigned int i;
6682
6683         if (!pqi_lockup_action_param)
6684                 return;
6685
6686         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6687                 if (strcmp(pqi_lockup_action_param,
6688                         pqi_lockup_actions[i].name) == 0) {
6689                         pqi_lockup_action = pqi_lockup_actions[i].action;
6690                         return;
6691                 }
6692         }
6693
6694         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
6695                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
6696 }
6697
6698 static void pqi_process_module_params(void)
6699 {
6700         pqi_process_lockup_action_param();
6701 }
6702
6703 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
6704 {
6705         struct pqi_ctrl_info *ctrl_info;
6706
6707         ctrl_info = pci_get_drvdata(pci_dev);
6708
6709         pqi_disable_events(ctrl_info);
6710         pqi_cancel_update_time_worker(ctrl_info);
6711         pqi_cancel_rescan_worker(ctrl_info);
6712         pqi_wait_until_scan_finished(ctrl_info);
6713         pqi_wait_until_lun_reset_finished(ctrl_info);
6714         pqi_flush_cache(ctrl_info, SUSPEND);
6715         pqi_ctrl_block_requests(ctrl_info);
6716         pqi_ctrl_wait_until_quiesced(ctrl_info);
6717         pqi_wait_until_inbound_queues_empty(ctrl_info);
6718         pqi_ctrl_wait_for_pending_io(ctrl_info);
6719         pqi_stop_heartbeat_timer(ctrl_info);
6720
6721         if (state.event == PM_EVENT_FREEZE)
6722                 return 0;
6723
6724         pci_save_state(pci_dev);
6725         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
6726
6727         ctrl_info->controller_online = false;
6728         ctrl_info->pqi_mode_enabled = false;
6729
6730         return 0;
6731 }
6732
6733 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
6734 {
6735         int rc;
6736         struct pqi_ctrl_info *ctrl_info;
6737
6738         ctrl_info = pci_get_drvdata(pci_dev);
6739
6740         if (pci_dev->current_state != PCI_D0) {
6741                 ctrl_info->max_hw_queue_index = 0;
6742                 pqi_free_interrupts(ctrl_info);
6743                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
6744                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
6745                         IRQF_SHARED, DRIVER_NAME_SHORT,
6746                         &ctrl_info->queue_groups[0]);
6747                 if (rc) {
6748                         dev_err(&ctrl_info->pci_dev->dev,
6749                                 "irq %u init failed with error %d\n",
6750                                 pci_dev->irq, rc);
6751                         return rc;
6752                 }
6753                 pqi_start_heartbeat_timer(ctrl_info);
6754                 pqi_ctrl_unblock_requests(ctrl_info);
6755                 return 0;
6756         }
6757
6758         pci_set_power_state(pci_dev, PCI_D0);
6759         pci_restore_state(pci_dev);
6760
6761         return pqi_ctrl_init_resume(ctrl_info);
6762 }
6763
6764 /* Define the PCI IDs for the controllers that we support. */
6765 static const struct pci_device_id pqi_pci_id_table[] = {
6766         {
6767                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6768                                0x105b, 0x1211)
6769         },
6770         {
6771                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6772                                0x105b, 0x1321)
6773         },
6774         {
6775                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6776                                0x152d, 0x8a22)
6777         },
6778         {
6779                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6780                                0x152d, 0x8a23)
6781         },
6782         {
6783                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6784                                0x152d, 0x8a24)
6785         },
6786         {
6787                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6788                                0x152d, 0x8a36)
6789         },
6790         {
6791                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6792                                0x152d, 0x8a37)
6793         },
6794         {
6795                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6796                                0x193d, 0x8460)
6797         },
6798         {
6799                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6800                                0x193d, 0x8461)
6801         },
6802         {
6803                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6804                                0x193d, 0xf460)
6805         },
6806         {
6807                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6808                                0x193d, 0xf461)
6809         },
6810         {
6811                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6812                                0x1bd4, 0x0045)
6813         },
6814         {
6815                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6816                                0x1bd4, 0x0046)
6817         },
6818         {
6819                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6820                                0x1bd4, 0x0047)
6821         },
6822         {
6823                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6824                                0x1bd4, 0x0048)
6825         },
6826         {
6827                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6828                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
6829         },
6830         {
6831                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6832                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
6833         },
6834         {
6835                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6836                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
6837         },
6838         {
6839                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6840                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
6841         },
6842         {
6843                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6844                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
6845         },
6846         {
6847                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6848                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
6849         },
6850         {
6851                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6852                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
6853         },
6854         {
6855                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6856                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
6857         },
6858         {
6859                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6860                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
6861         },
6862         {
6863                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6864                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
6865         },
6866         {
6867                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6868                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
6869         },
6870         {
6871                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6872                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
6873         },
6874         {
6875                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6876                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
6877         },
6878         {
6879                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6880                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
6881         },
6882         {
6883                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6884                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
6885         },
6886         {
6887                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6888                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
6889         },
6890         {
6891                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6892                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
6893         },
6894         {
6895                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6896                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
6897         },
6898         {
6899                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6900                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
6901         },
6902         {
6903                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6904                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
6905         },
6906         {
6907                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6908                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
6909         },
6910         {
6911                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6912                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
6913         },
6914         {
6915                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6916                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
6917         },
6918         {
6919                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6920                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
6921         },
6922         {
6923                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6924                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
6925         },
6926         {
6927                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6928                                PCI_VENDOR_ID_ADAPTEC2, 0x1282)
6929         },
6930         {
6931                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6932                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
6933         },
6934         {
6935                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6936                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
6937         },
6938         {
6939                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6940                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
6941         },
6942         {
6943                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6944                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
6945         },
6946         {
6947                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6948                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
6949         },
6950         {
6951                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6952                                PCI_VENDOR_ID_DELL, 0x1fe0)
6953         },
6954         {
6955                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6956                                PCI_VENDOR_ID_HP, 0x0600)
6957         },
6958         {
6959                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6960                                PCI_VENDOR_ID_HP, 0x0601)
6961         },
6962         {
6963                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6964                                PCI_VENDOR_ID_HP, 0x0602)
6965         },
6966         {
6967                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6968                                PCI_VENDOR_ID_HP, 0x0603)
6969         },
6970         {
6971                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6972                                PCI_VENDOR_ID_HP, 0x0609)
6973         },
6974         {
6975                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6976                                PCI_VENDOR_ID_HP, 0x0650)
6977         },
6978         {
6979                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6980                                PCI_VENDOR_ID_HP, 0x0651)
6981         },
6982         {
6983                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6984                                PCI_VENDOR_ID_HP, 0x0652)
6985         },
6986         {
6987                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6988                                PCI_VENDOR_ID_HP, 0x0653)
6989         },
6990         {
6991                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6992                                PCI_VENDOR_ID_HP, 0x0654)
6993         },
6994         {
6995                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6996                                PCI_VENDOR_ID_HP, 0x0655)
6997         },
6998         {
6999                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7000                                PCI_VENDOR_ID_HP, 0x0700)
7001         },
7002         {
7003                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7004                                PCI_VENDOR_ID_HP, 0x0701)
7005         },
7006         {
7007                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7008                                PCI_VENDOR_ID_HP, 0x1001)
7009         },
7010         {
7011                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7012                                PCI_VENDOR_ID_HP, 0x1100)
7013         },
7014         {
7015                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7016                                PCI_VENDOR_ID_HP, 0x1101)
7017         },
7018         {
7019                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7020                                PCI_ANY_ID, PCI_ANY_ID)
7021         },
7022         { 0 }
7023 };
7024
7025 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
7026
7027 static struct pci_driver pqi_pci_driver = {
7028         .name = DRIVER_NAME_SHORT,
7029         .id_table = pqi_pci_id_table,
7030         .probe = pqi_pci_probe,
7031         .remove = pqi_pci_remove,
7032         .shutdown = pqi_shutdown,
7033 #if defined(CONFIG_PM)
7034         .suspend = pqi_suspend,
7035         .resume = pqi_resume,
7036 #endif
7037 };
7038
7039 static int __init pqi_init(void)
7040 {
7041         int rc;
7042
7043         pr_info(DRIVER_NAME "\n");
7044
7045         pqi_sas_transport_template =
7046                 sas_attach_transport(&pqi_sas_transport_functions);
7047         if (!pqi_sas_transport_template)
7048                 return -ENODEV;
7049
7050         pqi_process_module_params();
7051
7052         rc = pci_register_driver(&pqi_pci_driver);
7053         if (rc)
7054                 sas_release_transport(pqi_sas_transport_template);
7055
7056         return rc;
7057 }
7058
7059 static void __exit pqi_cleanup(void)
7060 {
7061         pci_unregister_driver(&pqi_pci_driver);
7062         sas_release_transport(pqi_sas_transport_template);
7063 }
7064
7065 module_init(pqi_init);
7066 module_exit(pqi_cleanup);
7067
7068 static void __attribute__((unused)) verify_structures(void)
7069 {
7070         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7071                 sis_host_to_ctrl_doorbell) != 0x20);
7072         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7073                 sis_interrupt_mask) != 0x34);
7074         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7075                 sis_ctrl_to_host_doorbell) != 0x9c);
7076         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7077                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
7078         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7079                 sis_driver_scratch) != 0xb0);
7080         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7081                 sis_firmware_status) != 0xbc);
7082         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7083                 sis_mailbox) != 0x1000);
7084         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7085                 pqi_registers) != 0x4000);
7086
7087         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7088                 iu_type) != 0x0);
7089         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7090                 iu_length) != 0x2);
7091         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7092                 response_queue_id) != 0x4);
7093         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7094                 work_area) != 0x6);
7095         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
7096
7097         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7098                 status) != 0x0);
7099         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7100                 service_response) != 0x1);
7101         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7102                 data_present) != 0x2);
7103         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7104                 reserved) != 0x3);
7105         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7106                 residual_count) != 0x4);
7107         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7108                 data_length) != 0x8);
7109         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7110                 reserved1) != 0xa);
7111         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7112                 data) != 0xc);
7113         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
7114
7115         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7116                 data_in_result) != 0x0);
7117         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7118                 data_out_result) != 0x1);
7119         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7120                 reserved) != 0x2);
7121         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7122                 status) != 0x5);
7123         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7124                 status_qualifier) != 0x6);
7125         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7126                 sense_data_length) != 0x8);
7127         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7128                 response_data_length) != 0xa);
7129         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7130                 data_in_transferred) != 0xc);
7131         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7132                 data_out_transferred) != 0x10);
7133         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7134                 data) != 0x14);
7135         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
7136
7137         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7138                 signature) != 0x0);
7139         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7140                 function_and_status_code) != 0x8);
7141         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7142                 max_admin_iq_elements) != 0x10);
7143         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7144                 max_admin_oq_elements) != 0x11);
7145         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7146                 admin_iq_element_length) != 0x12);
7147         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7148                 admin_oq_element_length) != 0x13);
7149         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7150                 max_reset_timeout) != 0x14);
7151         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7152                 legacy_intx_status) != 0x18);
7153         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7154                 legacy_intx_mask_set) != 0x1c);
7155         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7156                 legacy_intx_mask_clear) != 0x20);
7157         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7158                 device_status) != 0x40);
7159         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7160                 admin_iq_pi_offset) != 0x48);
7161         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7162                 admin_oq_ci_offset) != 0x50);
7163         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7164                 admin_iq_element_array_addr) != 0x58);
7165         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7166                 admin_oq_element_array_addr) != 0x60);
7167         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7168                 admin_iq_ci_addr) != 0x68);
7169         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7170                 admin_oq_pi_addr) != 0x70);
7171         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7172                 admin_iq_num_elements) != 0x78);
7173         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7174                 admin_oq_num_elements) != 0x79);
7175         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7176                 admin_queue_int_msg_num) != 0x7a);
7177         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7178                 device_error) != 0x80);
7179         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7180                 error_details) != 0x88);
7181         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7182                 device_reset) != 0x90);
7183         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7184                 power_action) != 0x94);
7185         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
7186
7187         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7188                 header.iu_type) != 0);
7189         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7190                 header.iu_length) != 2);
7191         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7192                 header.work_area) != 6);
7193         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7194                 request_id) != 8);
7195         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7196                 function_code) != 10);
7197         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7198                 data.report_device_capability.buffer_length) != 44);
7199         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7200                 data.report_device_capability.sg_descriptor) != 48);
7201         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7202                 data.create_operational_iq.queue_id) != 12);
7203         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7204                 data.create_operational_iq.element_array_addr) != 16);
7205         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7206                 data.create_operational_iq.ci_addr) != 24);
7207         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7208                 data.create_operational_iq.num_elements) != 32);
7209         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7210                 data.create_operational_iq.element_length) != 34);
7211         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7212                 data.create_operational_iq.queue_protocol) != 36);
7213         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7214                 data.create_operational_oq.queue_id) != 12);
7215         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7216                 data.create_operational_oq.element_array_addr) != 16);
7217         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7218                 data.create_operational_oq.pi_addr) != 24);
7219         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7220                 data.create_operational_oq.num_elements) != 32);
7221         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7222                 data.create_operational_oq.element_length) != 34);
7223         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7224                 data.create_operational_oq.queue_protocol) != 36);
7225         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7226                 data.create_operational_oq.int_msg_num) != 40);
7227         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7228                 data.create_operational_oq.coalescing_count) != 42);
7229         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7230                 data.create_operational_oq.min_coalescing_time) != 44);
7231         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7232                 data.create_operational_oq.max_coalescing_time) != 48);
7233         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7234                 data.delete_operational_queue.queue_id) != 12);
7235         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
7236         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7237                 data.create_operational_iq) != 64 - 11);
7238         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7239                 data.create_operational_oq) != 64 - 11);
7240         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7241                 data.delete_operational_queue) != 64 - 11);
7242
7243         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7244                 header.iu_type) != 0);
7245         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7246                 header.iu_length) != 2);
7247         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7248                 header.work_area) != 6);
7249         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7250                 request_id) != 8);
7251         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7252                 function_code) != 10);
7253         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7254                 status) != 11);
7255         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7256                 data.create_operational_iq.status_descriptor) != 12);
7257         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7258                 data.create_operational_iq.iq_pi_offset) != 16);
7259         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7260                 data.create_operational_oq.status_descriptor) != 12);
7261         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7262                 data.create_operational_oq.oq_ci_offset) != 16);
7263         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
7264
7265         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7266                 header.iu_type) != 0);
7267         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7268                 header.iu_length) != 2);
7269         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7270                 header.response_queue_id) != 4);
7271         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7272                 header.work_area) != 6);
7273         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7274                 request_id) != 8);
7275         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7276                 nexus_id) != 10);
7277         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7278                 buffer_length) != 12);
7279         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7280                 lun_number) != 16);
7281         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7282                 protocol_specific) != 24);
7283         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7284                 error_index) != 27);
7285         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7286                 cdb) != 32);
7287         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7288                 sg_descriptors) != 64);
7289         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
7290                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7291
7292         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7293                 header.iu_type) != 0);
7294         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7295                 header.iu_length) != 2);
7296         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7297                 header.response_queue_id) != 4);
7298         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7299                 header.work_area) != 6);
7300         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7301                 request_id) != 8);
7302         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7303                 nexus_id) != 12);
7304         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7305                 buffer_length) != 16);
7306         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7307                 data_encryption_key_index) != 22);
7308         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7309                 encrypt_tweak_lower) != 24);
7310         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7311                 encrypt_tweak_upper) != 28);
7312         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7313                 cdb) != 32);
7314         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7315                 error_index) != 48);
7316         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7317                 num_sg_descriptors) != 50);
7318         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7319                 cdb_length) != 51);
7320         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7321                 lun_number) != 52);
7322         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7323                 sg_descriptors) != 64);
7324         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
7325                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7326
7327         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7328                 header.iu_type) != 0);
7329         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7330                 header.iu_length) != 2);
7331         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7332                 request_id) != 8);
7333         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7334                 error_index) != 10);
7335
7336         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7337                 header.iu_type) != 0);
7338         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7339                 header.iu_length) != 2);
7340         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7341                 header.response_queue_id) != 4);
7342         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7343                 request_id) != 8);
7344         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7345                 data.report_event_configuration.buffer_length) != 12);
7346         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7347                 data.report_event_configuration.sg_descriptors) != 16);
7348         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7349                 data.set_event_configuration.global_event_oq_id) != 10);
7350         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7351                 data.set_event_configuration.buffer_length) != 12);
7352         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7353                 data.set_event_configuration.sg_descriptors) != 16);
7354
7355         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7356                 max_inbound_iu_length) != 6);
7357         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7358                 max_outbound_iu_length) != 14);
7359         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
7360
7361         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7362                 data_length) != 0);
7363         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7364                 iq_arbitration_priority_support_bitmask) != 8);
7365         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7366                 maximum_aw_a) != 9);
7367         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7368                 maximum_aw_b) != 10);
7369         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7370                 maximum_aw_c) != 11);
7371         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7372                 max_inbound_queues) != 16);
7373         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7374                 max_elements_per_iq) != 18);
7375         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7376                 max_iq_element_length) != 24);
7377         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7378                 min_iq_element_length) != 26);
7379         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7380                 max_outbound_queues) != 30);
7381         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7382                 max_elements_per_oq) != 32);
7383         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7384                 intr_coalescing_time_granularity) != 34);
7385         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7386                 max_oq_element_length) != 36);
7387         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7388                 min_oq_element_length) != 38);
7389         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7390                 iu_layer_descriptors) != 64);
7391         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
7392
7393         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7394                 event_type) != 0);
7395         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7396                 oq_id) != 2);
7397         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
7398
7399         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7400                 num_event_descriptors) != 2);
7401         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7402                 descriptors) != 4);
7403
7404         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
7405                 ARRAY_SIZE(pqi_supported_event_types));
7406
7407         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7408                 header.iu_type) != 0);
7409         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7410                 header.iu_length) != 2);
7411         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7412                 event_type) != 8);
7413         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7414                 event_id) != 10);
7415         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7416                 additional_event_id) != 12);
7417         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7418                 data) != 16);
7419         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
7420
7421         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7422                 header.iu_type) != 0);
7423         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7424                 header.iu_length) != 2);
7425         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7426                 event_type) != 8);
7427         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7428                 event_id) != 10);
7429         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7430                 additional_event_id) != 12);
7431         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
7432
7433         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7434                 header.iu_type) != 0);
7435         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7436                 header.iu_length) != 2);
7437         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7438                 request_id) != 8);
7439         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7440                 nexus_id) != 10);
7441         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7442                 lun_number) != 16);
7443         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7444                 protocol_specific) != 24);
7445         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7446                 outbound_queue_id_to_manage) != 26);
7447         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7448                 request_id_to_manage) != 28);
7449         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7450                 task_management_function) != 30);
7451         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
7452
7453         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7454                 header.iu_type) != 0);
7455         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7456                 header.iu_length) != 2);
7457         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7458                 request_id) != 8);
7459         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7460                 nexus_id) != 10);
7461         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7462                 additional_response_info) != 12);
7463         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7464                 response_code) != 15);
7465         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
7466
7467         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7468                 configured_logical_drive_count) != 0);
7469         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7470                 configuration_signature) != 1);
7471         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7472                 firmware_version) != 5);
7473         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7474                 extended_logical_unit_count) != 154);
7475         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7476                 firmware_build_number) != 190);
7477         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7478                 controller_mode) != 292);
7479
7480         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7481                 phys_bay_in_box) != 115);
7482         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7483                 device_type) != 120);
7484         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7485                 redundant_path_present_map) != 1736);
7486         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7487                 active_path_number) != 1738);
7488         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7489                 alternate_paths_phys_connector) != 1739);
7490         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7491                 alternate_paths_phys_box_on_port) != 1755);
7492         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7493                 current_queue_depth_limit) != 1796);
7494         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
7495
7496         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
7497         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
7498         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
7499                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7500         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
7501                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7502         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
7503         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
7504                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7505         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
7506         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
7507                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7508
7509         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
7510         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
7511                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
7512 }