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 =
4256                 kcalloc(ctrl_info->max_io_slots,
4257                         sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4258
4259         if (!ctrl_info->io_request_pool) {
4260                 dev_err(&ctrl_info->pci_dev->dev,
4261                         "failed to allocate I/O request pool\n");
4262                 goto error;
4263         }
4264
4265         dev = &ctrl_info->pci_dev->dev;
4266         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4267         io_request = ctrl_info->io_request_pool;
4268
4269         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4270                 io_request->iu =
4271                         kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4272
4273                 if (!io_request->iu) {
4274                         dev_err(&ctrl_info->pci_dev->dev,
4275                                 "failed to allocate IU buffers\n");
4276                         goto error;
4277                 }
4278
4279                 sg_chain_buffer = dma_alloc_coherent(dev,
4280                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4281                         GFP_KERNEL);
4282
4283                 if (!sg_chain_buffer) {
4284                         dev_err(&ctrl_info->pci_dev->dev,
4285                                 "failed to allocate PQI scatter-gather chain buffers\n");
4286                         goto error;
4287                 }
4288
4289                 io_request->index = i;
4290                 io_request->sg_chain_buffer = sg_chain_buffer;
4291                 io_request->sg_chain_buffer_dma_handle =
4292                         sg_chain_buffer_dma_handle;
4293                 io_request++;
4294         }
4295
4296         return 0;
4297
4298 error:
4299         pqi_free_all_io_requests(ctrl_info);
4300
4301         return -ENOMEM;
4302 }
4303
4304 /*
4305  * Calculate required resources that are sized based on max. outstanding
4306  * requests and max. transfer size.
4307  */
4308
4309 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4310 {
4311         u32 max_transfer_size;
4312         u32 max_sg_entries;
4313
4314         ctrl_info->scsi_ml_can_queue =
4315                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4316         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4317
4318         ctrl_info->error_buffer_length =
4319                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4320
4321         if (reset_devices)
4322                 max_transfer_size = min(ctrl_info->max_transfer_size,
4323                         PQI_MAX_TRANSFER_SIZE_KDUMP);
4324         else
4325                 max_transfer_size = min(ctrl_info->max_transfer_size,
4326                         PQI_MAX_TRANSFER_SIZE);
4327
4328         max_sg_entries = max_transfer_size / PAGE_SIZE;
4329
4330         /* +1 to cover when the buffer is not page-aligned. */
4331         max_sg_entries++;
4332
4333         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4334
4335         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4336
4337         ctrl_info->sg_chain_buffer_length =
4338                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4339                 PQI_EXTRA_SGL_MEMORY;
4340         ctrl_info->sg_tablesize = max_sg_entries;
4341         ctrl_info->max_sectors = max_transfer_size / 512;
4342 }
4343
4344 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4345 {
4346         int num_queue_groups;
4347         u16 num_elements_per_iq;
4348         u16 num_elements_per_oq;
4349
4350         if (reset_devices) {
4351                 num_queue_groups = 1;
4352         } else {
4353                 int num_cpus;
4354                 int max_queue_groups;
4355
4356                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4357                         ctrl_info->max_outbound_queues - 1);
4358                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4359
4360                 num_cpus = num_online_cpus();
4361                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4362                 num_queue_groups = min(num_queue_groups, max_queue_groups);
4363         }
4364
4365         ctrl_info->num_queue_groups = num_queue_groups;
4366         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
4367
4368         /*
4369          * Make sure that the max. inbound IU length is an even multiple
4370          * of our inbound element length.
4371          */
4372         ctrl_info->max_inbound_iu_length =
4373                 (ctrl_info->max_inbound_iu_length_per_firmware /
4374                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4375                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4376
4377         num_elements_per_iq =
4378                 (ctrl_info->max_inbound_iu_length /
4379                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4380
4381         /* Add one because one element in each queue is unusable. */
4382         num_elements_per_iq++;
4383
4384         num_elements_per_iq = min(num_elements_per_iq,
4385                 ctrl_info->max_elements_per_iq);
4386
4387         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4388         num_elements_per_oq = min(num_elements_per_oq,
4389                 ctrl_info->max_elements_per_oq);
4390
4391         ctrl_info->num_elements_per_iq = num_elements_per_iq;
4392         ctrl_info->num_elements_per_oq = num_elements_per_oq;
4393
4394         ctrl_info->max_sg_per_iu =
4395                 ((ctrl_info->max_inbound_iu_length -
4396                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4397                 sizeof(struct pqi_sg_descriptor)) +
4398                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4399 }
4400
4401 static inline void pqi_set_sg_descriptor(
4402         struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4403 {
4404         u64 address = (u64)sg_dma_address(sg);
4405         unsigned int length = sg_dma_len(sg);
4406
4407         put_unaligned_le64(address, &sg_descriptor->address);
4408         put_unaligned_le32(length, &sg_descriptor->length);
4409         put_unaligned_le32(0, &sg_descriptor->flags);
4410 }
4411
4412 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4413         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4414         struct pqi_io_request *io_request)
4415 {
4416         int i;
4417         u16 iu_length;
4418         int sg_count;
4419         bool chained;
4420         unsigned int num_sg_in_iu;
4421         unsigned int max_sg_per_iu;
4422         struct scatterlist *sg;
4423         struct pqi_sg_descriptor *sg_descriptor;
4424
4425         sg_count = scsi_dma_map(scmd);
4426         if (sg_count < 0)
4427                 return sg_count;
4428
4429         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4430                 PQI_REQUEST_HEADER_LENGTH;
4431
4432         if (sg_count == 0)
4433                 goto out;
4434
4435         sg = scsi_sglist(scmd);
4436         sg_descriptor = request->sg_descriptors;
4437         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4438         chained = false;
4439         num_sg_in_iu = 0;
4440         i = 0;
4441
4442         while (1) {
4443                 pqi_set_sg_descriptor(sg_descriptor, sg);
4444                 if (!chained)
4445                         num_sg_in_iu++;
4446                 i++;
4447                 if (i == sg_count)
4448                         break;
4449                 sg_descriptor++;
4450                 if (i == max_sg_per_iu) {
4451                         put_unaligned_le64(
4452                                 (u64)io_request->sg_chain_buffer_dma_handle,
4453                                 &sg_descriptor->address);
4454                         put_unaligned_le32((sg_count - num_sg_in_iu)
4455                                 * sizeof(*sg_descriptor),
4456                                 &sg_descriptor->length);
4457                         put_unaligned_le32(CISS_SG_CHAIN,
4458                                 &sg_descriptor->flags);
4459                         chained = true;
4460                         num_sg_in_iu++;
4461                         sg_descriptor = io_request->sg_chain_buffer;
4462                 }
4463                 sg = sg_next(sg);
4464         }
4465
4466         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4467         request->partial = chained;
4468         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4469
4470 out:
4471         put_unaligned_le16(iu_length, &request->header.iu_length);
4472
4473         return 0;
4474 }
4475
4476 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4477         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4478         struct pqi_io_request *io_request)
4479 {
4480         int i;
4481         u16 iu_length;
4482         int sg_count;
4483         bool chained;
4484         unsigned int num_sg_in_iu;
4485         unsigned int max_sg_per_iu;
4486         struct scatterlist *sg;
4487         struct pqi_sg_descriptor *sg_descriptor;
4488
4489         sg_count = scsi_dma_map(scmd);
4490         if (sg_count < 0)
4491                 return sg_count;
4492
4493         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4494                 PQI_REQUEST_HEADER_LENGTH;
4495         num_sg_in_iu = 0;
4496
4497         if (sg_count == 0)
4498                 goto out;
4499
4500         sg = scsi_sglist(scmd);
4501         sg_descriptor = request->sg_descriptors;
4502         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4503         chained = false;
4504         i = 0;
4505
4506         while (1) {
4507                 pqi_set_sg_descriptor(sg_descriptor, sg);
4508                 if (!chained)
4509                         num_sg_in_iu++;
4510                 i++;
4511                 if (i == sg_count)
4512                         break;
4513                 sg_descriptor++;
4514                 if (i == max_sg_per_iu) {
4515                         put_unaligned_le64(
4516                                 (u64)io_request->sg_chain_buffer_dma_handle,
4517                                 &sg_descriptor->address);
4518                         put_unaligned_le32((sg_count - num_sg_in_iu)
4519                                 * sizeof(*sg_descriptor),
4520                                 &sg_descriptor->length);
4521                         put_unaligned_le32(CISS_SG_CHAIN,
4522                                 &sg_descriptor->flags);
4523                         chained = true;
4524                         num_sg_in_iu++;
4525                         sg_descriptor = io_request->sg_chain_buffer;
4526                 }
4527                 sg = sg_next(sg);
4528         }
4529
4530         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4531         request->partial = chained;
4532         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4533
4534 out:
4535         put_unaligned_le16(iu_length, &request->header.iu_length);
4536         request->num_sg_descriptors = num_sg_in_iu;
4537
4538         return 0;
4539 }
4540
4541 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4542         void *context)
4543 {
4544         struct scsi_cmnd *scmd;
4545
4546         scmd = io_request->scmd;
4547         pqi_free_io_request(io_request);
4548         scsi_dma_unmap(scmd);
4549         pqi_scsi_done(scmd);
4550 }
4551
4552 static int pqi_raid_submit_scsi_cmd_with_io_request(
4553         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
4554         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4555         struct pqi_queue_group *queue_group)
4556 {
4557         int rc;
4558         size_t cdb_length;
4559         struct pqi_raid_path_request *request;
4560
4561         io_request->io_complete_callback = pqi_raid_io_complete;
4562         io_request->scmd = scmd;
4563
4564         request = io_request->iu;
4565         memset(request, 0,
4566                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4567
4568         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4569         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4570         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4571         put_unaligned_le16(io_request->index, &request->request_id);
4572         request->error_index = request->request_id;
4573         memcpy(request->lun_number, device->scsi3addr,
4574                 sizeof(request->lun_number));
4575
4576         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4577         memcpy(request->cdb, scmd->cmnd, cdb_length);
4578
4579         switch (cdb_length) {
4580         case 6:
4581         case 10:
4582         case 12:
4583         case 16:
4584                 /* No bytes in the Additional CDB bytes field */
4585                 request->additional_cdb_bytes_usage =
4586                         SOP_ADDITIONAL_CDB_BYTES_0;
4587                 break;
4588         case 20:
4589                 /* 4 bytes in the Additional cdb field */
4590                 request->additional_cdb_bytes_usage =
4591                         SOP_ADDITIONAL_CDB_BYTES_4;
4592                 break;
4593         case 24:
4594                 /* 8 bytes in the Additional cdb field */
4595                 request->additional_cdb_bytes_usage =
4596                         SOP_ADDITIONAL_CDB_BYTES_8;
4597                 break;
4598         case 28:
4599                 /* 12 bytes in the Additional cdb field */
4600                 request->additional_cdb_bytes_usage =
4601                         SOP_ADDITIONAL_CDB_BYTES_12;
4602                 break;
4603         case 32:
4604         default:
4605                 /* 16 bytes in the Additional cdb field */
4606                 request->additional_cdb_bytes_usage =
4607                         SOP_ADDITIONAL_CDB_BYTES_16;
4608                 break;
4609         }
4610
4611         switch (scmd->sc_data_direction) {
4612         case DMA_TO_DEVICE:
4613                 request->data_direction = SOP_READ_FLAG;
4614                 break;
4615         case DMA_FROM_DEVICE:
4616                 request->data_direction = SOP_WRITE_FLAG;
4617                 break;
4618         case DMA_NONE:
4619                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4620                 break;
4621         case DMA_BIDIRECTIONAL:
4622                 request->data_direction = SOP_BIDIRECTIONAL;
4623                 break;
4624         default:
4625                 dev_err(&ctrl_info->pci_dev->dev,
4626                         "unknown data direction: %d\n",
4627                         scmd->sc_data_direction);
4628                 break;
4629         }
4630
4631         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
4632         if (rc) {
4633                 pqi_free_io_request(io_request);
4634                 return SCSI_MLQUEUE_HOST_BUSY;
4635         }
4636
4637         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
4638
4639         return 0;
4640 }
4641
4642 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4643         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4644         struct pqi_queue_group *queue_group)
4645 {
4646         struct pqi_io_request *io_request;
4647
4648         io_request = pqi_alloc_io_request(ctrl_info);
4649
4650         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4651                 device, scmd, queue_group);
4652 }
4653
4654 static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info)
4655 {
4656         if (!pqi_ctrl_blocked(ctrl_info))
4657                 schedule_work(&ctrl_info->raid_bypass_retry_work);
4658 }
4659
4660 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
4661 {
4662         struct scsi_cmnd *scmd;
4663         struct pqi_scsi_dev *device;
4664         struct pqi_ctrl_info *ctrl_info;
4665
4666         if (!io_request->raid_bypass)
4667                 return false;
4668
4669         scmd = io_request->scmd;
4670         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
4671                 return false;
4672         if (host_byte(scmd->result) == DID_NO_CONNECT)
4673                 return false;
4674
4675         device = scmd->device->hostdata;
4676         if (pqi_device_offline(device))
4677                 return false;
4678
4679         ctrl_info = shost_to_hba(scmd->device->host);
4680         if (pqi_ctrl_offline(ctrl_info))
4681                 return false;
4682
4683         return true;
4684 }
4685
4686 static inline void pqi_add_to_raid_bypass_retry_list(
4687         struct pqi_ctrl_info *ctrl_info,
4688         struct pqi_io_request *io_request, bool at_head)
4689 {
4690         unsigned long flags;
4691
4692         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4693         if (at_head)
4694                 list_add(&io_request->request_list_entry,
4695                         &ctrl_info->raid_bypass_retry_list);
4696         else
4697                 list_add_tail(&io_request->request_list_entry,
4698                         &ctrl_info->raid_bypass_retry_list);
4699         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4700 }
4701
4702 static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request,
4703         void *context)
4704 {
4705         struct scsi_cmnd *scmd;
4706
4707         scmd = io_request->scmd;
4708         pqi_free_io_request(io_request);
4709         pqi_scsi_done(scmd);
4710 }
4711
4712 static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request)
4713 {
4714         struct scsi_cmnd *scmd;
4715         struct pqi_ctrl_info *ctrl_info;
4716
4717         io_request->io_complete_callback = pqi_queued_raid_bypass_complete;
4718         scmd = io_request->scmd;
4719         scmd->result = 0;
4720         ctrl_info = shost_to_hba(scmd->device->host);
4721
4722         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false);
4723         pqi_schedule_bypass_retry(ctrl_info);
4724 }
4725
4726 static int pqi_retry_raid_bypass(struct pqi_io_request *io_request)
4727 {
4728         struct scsi_cmnd *scmd;
4729         struct pqi_scsi_dev *device;
4730         struct pqi_ctrl_info *ctrl_info;
4731         struct pqi_queue_group *queue_group;
4732
4733         scmd = io_request->scmd;
4734         device = scmd->device->hostdata;
4735         if (pqi_device_in_reset(device)) {
4736                 pqi_free_io_request(io_request);
4737                 set_host_byte(scmd, DID_RESET);
4738                 pqi_scsi_done(scmd);
4739                 return 0;
4740         }
4741
4742         ctrl_info = shost_to_hba(scmd->device->host);
4743         queue_group = io_request->queue_group;
4744
4745         pqi_reinit_io_request(io_request);
4746
4747         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4748                 device, scmd, queue_group);
4749 }
4750
4751 static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request(
4752         struct pqi_ctrl_info *ctrl_info)
4753 {
4754         unsigned long flags;
4755         struct pqi_io_request *io_request;
4756
4757         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4758         io_request = list_first_entry_or_null(
4759                 &ctrl_info->raid_bypass_retry_list,
4760                 struct pqi_io_request, request_list_entry);
4761         if (io_request)
4762                 list_del(&io_request->request_list_entry);
4763         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4764
4765         return io_request;
4766 }
4767
4768 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info)
4769 {
4770         int rc;
4771         struct pqi_io_request *io_request;
4772
4773         pqi_ctrl_busy(ctrl_info);
4774
4775         while (1) {
4776                 if (pqi_ctrl_blocked(ctrl_info))
4777                         break;
4778                 io_request = pqi_next_queued_raid_bypass_request(ctrl_info);
4779                 if (!io_request)
4780                         break;
4781                 rc = pqi_retry_raid_bypass(io_request);
4782                 if (rc) {
4783                         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request,
4784                                 true);
4785                         pqi_schedule_bypass_retry(ctrl_info);
4786                         break;
4787                 }
4788         }
4789
4790         pqi_ctrl_unbusy(ctrl_info);
4791 }
4792
4793 static void pqi_raid_bypass_retry_worker(struct work_struct *work)
4794 {
4795         struct pqi_ctrl_info *ctrl_info;
4796
4797         ctrl_info = container_of(work, struct pqi_ctrl_info,
4798                 raid_bypass_retry_work);
4799         pqi_retry_raid_bypass_requests(ctrl_info);
4800 }
4801
4802 static void pqi_clear_all_queued_raid_bypass_retries(
4803         struct pqi_ctrl_info *ctrl_info)
4804 {
4805         unsigned long flags;
4806
4807         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4808         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
4809         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4810 }
4811
4812 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
4813         void *context)
4814 {
4815         struct scsi_cmnd *scmd;
4816
4817         scmd = io_request->scmd;
4818         scsi_dma_unmap(scmd);
4819         if (io_request->status == -EAGAIN)
4820                 set_host_byte(scmd, DID_IMM_RETRY);
4821         else if (pqi_raid_bypass_retry_needed(io_request)) {
4822                 pqi_queue_raid_bypass_retry(io_request);
4823                 return;
4824         }
4825         pqi_free_io_request(io_request);
4826         pqi_scsi_done(scmd);
4827 }
4828
4829 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4830         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4831         struct pqi_queue_group *queue_group)
4832 {
4833         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
4834                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
4835 }
4836
4837 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
4838         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
4839         unsigned int cdb_length, struct pqi_queue_group *queue_group,
4840         struct pqi_encryption_info *encryption_info, bool raid_bypass)
4841 {
4842         int rc;
4843         struct pqi_io_request *io_request;
4844         struct pqi_aio_path_request *request;
4845
4846         io_request = pqi_alloc_io_request(ctrl_info);
4847         io_request->io_complete_callback = pqi_aio_io_complete;
4848         io_request->scmd = scmd;
4849         io_request->raid_bypass = raid_bypass;
4850
4851         request = io_request->iu;
4852         memset(request, 0,
4853                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4854
4855         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
4856         put_unaligned_le32(aio_handle, &request->nexus_id);
4857         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4858         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4859         put_unaligned_le16(io_request->index, &request->request_id);
4860         request->error_index = request->request_id;
4861         if (cdb_length > sizeof(request->cdb))
4862                 cdb_length = sizeof(request->cdb);
4863         request->cdb_length = cdb_length;
4864         memcpy(request->cdb, cdb, cdb_length);
4865
4866         switch (scmd->sc_data_direction) {
4867         case DMA_TO_DEVICE:
4868                 request->data_direction = SOP_READ_FLAG;
4869                 break;
4870         case DMA_FROM_DEVICE:
4871                 request->data_direction = SOP_WRITE_FLAG;
4872                 break;
4873         case DMA_NONE:
4874                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4875                 break;
4876         case DMA_BIDIRECTIONAL:
4877                 request->data_direction = SOP_BIDIRECTIONAL;
4878                 break;
4879         default:
4880                 dev_err(&ctrl_info->pci_dev->dev,
4881                         "unknown data direction: %d\n",
4882                         scmd->sc_data_direction);
4883                 break;
4884         }
4885
4886         if (encryption_info) {
4887                 request->encryption_enable = true;
4888                 put_unaligned_le16(encryption_info->data_encryption_key_index,
4889                         &request->data_encryption_key_index);
4890                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
4891                         &request->encrypt_tweak_lower);
4892                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
4893                         &request->encrypt_tweak_upper);
4894         }
4895
4896         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
4897         if (rc) {
4898                 pqi_free_io_request(io_request);
4899                 return SCSI_MLQUEUE_HOST_BUSY;
4900         }
4901
4902         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
4903
4904         return 0;
4905 }
4906
4907 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
4908         struct scsi_cmnd *scmd)
4909 {
4910         u16 hw_queue;
4911
4912         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
4913         if (hw_queue > ctrl_info->max_hw_queue_index)
4914                 hw_queue = 0;
4915
4916         return hw_queue;
4917 }
4918
4919 /*
4920  * This function gets called just before we hand the completed SCSI request
4921  * back to the SML.
4922  */
4923
4924 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
4925 {
4926         struct pqi_scsi_dev *device;
4927
4928         device = scmd->device->hostdata;
4929         atomic_dec(&device->scsi_cmds_outstanding);
4930 }
4931
4932 static int pqi_scsi_queue_command(struct Scsi_Host *shost,
4933         struct scsi_cmnd *scmd)
4934 {
4935         int rc;
4936         struct pqi_ctrl_info *ctrl_info;
4937         struct pqi_scsi_dev *device;
4938         u16 hw_queue;
4939         struct pqi_queue_group *queue_group;
4940         bool raid_bypassed;
4941
4942         device = scmd->device->hostdata;
4943         ctrl_info = shost_to_hba(shost);
4944
4945         atomic_inc(&device->scsi_cmds_outstanding);
4946
4947         if (pqi_ctrl_offline(ctrl_info)) {
4948                 set_host_byte(scmd, DID_NO_CONNECT);
4949                 pqi_scsi_done(scmd);
4950                 return 0;
4951         }
4952
4953         pqi_ctrl_busy(ctrl_info);
4954         if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device)) {
4955                 rc = SCSI_MLQUEUE_HOST_BUSY;
4956                 goto out;
4957         }
4958
4959         /*
4960          * This is necessary because the SML doesn't zero out this field during
4961          * error recovery.
4962          */
4963         scmd->result = 0;
4964
4965         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
4966         queue_group = &ctrl_info->queue_groups[hw_queue];
4967
4968         if (pqi_is_logical_device(device)) {
4969                 raid_bypassed = false;
4970                 if (device->raid_bypass_enabled &&
4971                                 !blk_rq_is_passthrough(scmd->request)) {
4972                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
4973                                 scmd, queue_group);
4974                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY)
4975                                 raid_bypassed = true;
4976                 }
4977                 if (!raid_bypassed)
4978                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
4979                                 queue_group);
4980         } else {
4981                 if (device->aio_enabled)
4982                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
4983                                 queue_group);
4984                 else
4985                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
4986                                 queue_group);
4987         }
4988
4989 out:
4990         pqi_ctrl_unbusy(ctrl_info);
4991         if (rc)
4992                 atomic_dec(&device->scsi_cmds_outstanding);
4993
4994         return rc;
4995 }
4996
4997 static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
4998         struct pqi_queue_group *queue_group)
4999 {
5000         unsigned int path;
5001         unsigned long flags;
5002         bool list_is_empty;
5003
5004         for (path = 0; path < 2; path++) {
5005                 while (1) {
5006                         spin_lock_irqsave(
5007                                 &queue_group->submit_lock[path], flags);
5008                         list_is_empty =
5009                                 list_empty(&queue_group->request_list[path]);
5010                         spin_unlock_irqrestore(
5011                                 &queue_group->submit_lock[path], flags);
5012                         if (list_is_empty)
5013                                 break;
5014                         pqi_check_ctrl_health(ctrl_info);
5015                         if (pqi_ctrl_offline(ctrl_info))
5016                                 return -ENXIO;
5017                         usleep_range(1000, 2000);
5018                 }
5019         }
5020
5021         return 0;
5022 }
5023
5024 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5025 {
5026         int rc;
5027         unsigned int i;
5028         unsigned int path;
5029         struct pqi_queue_group *queue_group;
5030         pqi_index_t iq_pi;
5031         pqi_index_t iq_ci;
5032
5033         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5034                 queue_group = &ctrl_info->queue_groups[i];
5035
5036                 rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5037                 if (rc)
5038                         return rc;
5039
5040                 for (path = 0; path < 2; path++) {
5041                         iq_pi = queue_group->iq_pi_copy[path];
5042
5043                         while (1) {
5044                                 iq_ci = *queue_group->iq_ci[path];
5045                                 if (iq_ci == iq_pi)
5046                                         break;
5047                                 pqi_check_ctrl_health(ctrl_info);
5048                                 if (pqi_ctrl_offline(ctrl_info))
5049                                         return -ENXIO;
5050                                 usleep_range(1000, 2000);
5051                         }
5052                 }
5053         }
5054
5055         return 0;
5056 }
5057
5058 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5059         struct pqi_scsi_dev *device)
5060 {
5061         unsigned int i;
5062         unsigned int path;
5063         struct pqi_queue_group *queue_group;
5064         unsigned long flags;
5065         struct pqi_io_request *io_request;
5066         struct pqi_io_request *next;
5067         struct scsi_cmnd *scmd;
5068         struct pqi_scsi_dev *scsi_device;
5069
5070         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5071                 queue_group = &ctrl_info->queue_groups[i];
5072
5073                 for (path = 0; path < 2; path++) {
5074                         spin_lock_irqsave(
5075                                 &queue_group->submit_lock[path], flags);
5076
5077                         list_for_each_entry_safe(io_request, next,
5078                                 &queue_group->request_list[path],
5079                                 request_list_entry) {
5080                                 scmd = io_request->scmd;
5081                                 if (!scmd)
5082                                         continue;
5083
5084                                 scsi_device = scmd->device->hostdata;
5085                                 if (scsi_device != device)
5086                                         continue;
5087
5088                                 list_del(&io_request->request_list_entry);
5089                                 set_host_byte(scmd, DID_RESET);
5090                                 pqi_scsi_done(scmd);
5091                         }
5092
5093                         spin_unlock_irqrestore(
5094                                 &queue_group->submit_lock[path], flags);
5095                 }
5096         }
5097 }
5098
5099 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5100         struct pqi_scsi_dev *device)
5101 {
5102         while (atomic_read(&device->scsi_cmds_outstanding)) {
5103                 pqi_check_ctrl_health(ctrl_info);
5104                 if (pqi_ctrl_offline(ctrl_info))
5105                         return -ENXIO;
5106                 usleep_range(1000, 2000);
5107         }
5108
5109         return 0;
5110 }
5111
5112 static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info)
5113 {
5114         bool io_pending;
5115         unsigned long flags;
5116         struct pqi_scsi_dev *device;
5117
5118         while (1) {
5119                 io_pending = false;
5120
5121                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5122                 list_for_each_entry(device, &ctrl_info->scsi_device_list,
5123                         scsi_device_list_entry) {
5124                         if (atomic_read(&device->scsi_cmds_outstanding)) {
5125                                 io_pending = true;
5126                                 break;
5127                         }
5128                 }
5129                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5130                                         flags);
5131
5132                 if (!io_pending)
5133                         break;
5134
5135                 pqi_check_ctrl_health(ctrl_info);
5136                 if (pqi_ctrl_offline(ctrl_info))
5137                         return -ENXIO;
5138
5139                 usleep_range(1000, 2000);
5140         }
5141
5142         return 0;
5143 }
5144
5145 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5146         void *context)
5147 {
5148         struct completion *waiting = context;
5149
5150         complete(waiting);
5151 }
5152
5153 #define PQI_LUN_RESET_TIMEOUT_SECS      10
5154
5155 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5156         struct pqi_scsi_dev *device, struct completion *wait)
5157 {
5158         int rc;
5159
5160         while (1) {
5161                 if (wait_for_completion_io_timeout(wait,
5162                         PQI_LUN_RESET_TIMEOUT_SECS * HZ)) {
5163                         rc = 0;
5164                         break;
5165                 }
5166
5167                 pqi_check_ctrl_health(ctrl_info);
5168                 if (pqi_ctrl_offline(ctrl_info)) {
5169                         rc = -ENXIO;
5170                         break;
5171                 }
5172         }
5173
5174         return rc;
5175 }
5176
5177 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
5178         struct pqi_scsi_dev *device)
5179 {
5180         int rc;
5181         struct pqi_io_request *io_request;
5182         DECLARE_COMPLETION_ONSTACK(wait);
5183         struct pqi_task_management_request *request;
5184
5185         io_request = pqi_alloc_io_request(ctrl_info);
5186         io_request->io_complete_callback = pqi_lun_reset_complete;
5187         io_request->context = &wait;
5188
5189         request = io_request->iu;
5190         memset(request, 0, sizeof(*request));
5191
5192         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5193         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5194                 &request->header.iu_length);
5195         put_unaligned_le16(io_request->index, &request->request_id);
5196         memcpy(request->lun_number, device->scsi3addr,
5197                 sizeof(request->lun_number));
5198         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5199
5200         pqi_start_io(ctrl_info,
5201                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5202                 io_request);
5203
5204         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5205         if (rc == 0)
5206                 rc = io_request->status;
5207
5208         pqi_free_io_request(io_request);
5209
5210         return rc;
5211 }
5212
5213 /* Performs a reset at the LUN level. */
5214
5215 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5216         struct pqi_scsi_dev *device)
5217 {
5218         int rc;
5219
5220         rc = pqi_lun_reset(ctrl_info, device);
5221         if (rc == 0)
5222                 rc = pqi_device_wait_for_pending_io(ctrl_info, device);
5223
5224         return rc == 0 ? SUCCESS : FAILED;
5225 }
5226
5227 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
5228 {
5229         int rc;
5230         struct Scsi_Host *shost;
5231         struct pqi_ctrl_info *ctrl_info;
5232         struct pqi_scsi_dev *device;
5233
5234         shost = scmd->device->host;
5235         ctrl_info = shost_to_hba(shost);
5236         device = scmd->device->hostdata;
5237
5238         dev_err(&ctrl_info->pci_dev->dev,
5239                 "resetting scsi %d:%d:%d:%d\n",
5240                 shost->host_no, device->bus, device->target, device->lun);
5241
5242         pqi_check_ctrl_health(ctrl_info);
5243         if (pqi_ctrl_offline(ctrl_info)) {
5244                 rc = FAILED;
5245                 goto out;
5246         }
5247
5248         mutex_lock(&ctrl_info->lun_reset_mutex);
5249
5250         pqi_ctrl_block_requests(ctrl_info);
5251         pqi_ctrl_wait_until_quiesced(ctrl_info);
5252         pqi_fail_io_queued_for_device(ctrl_info, device);
5253         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
5254         pqi_device_reset_start(device);
5255         pqi_ctrl_unblock_requests(ctrl_info);
5256
5257         if (rc)
5258                 rc = FAILED;
5259         else
5260                 rc = pqi_device_reset(ctrl_info, device);
5261
5262         pqi_device_reset_done(device);
5263
5264         mutex_unlock(&ctrl_info->lun_reset_mutex);
5265
5266 out:
5267         dev_err(&ctrl_info->pci_dev->dev,
5268                 "reset of scsi %d:%d:%d:%d: %s\n",
5269                 shost->host_no, device->bus, device->target, device->lun,
5270                 rc == SUCCESS ? "SUCCESS" : "FAILED");
5271
5272         return rc;
5273 }
5274
5275 static int pqi_slave_alloc(struct scsi_device *sdev)
5276 {
5277         struct pqi_scsi_dev *device;
5278         unsigned long flags;
5279         struct pqi_ctrl_info *ctrl_info;
5280         struct scsi_target *starget;
5281         struct sas_rphy *rphy;
5282
5283         ctrl_info = shost_to_hba(sdev->host);
5284
5285         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5286
5287         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
5288                 starget = scsi_target(sdev);
5289                 rphy = target_to_rphy(starget);
5290                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
5291                 if (device) {
5292                         device->target = sdev_id(sdev);
5293                         device->lun = sdev->lun;
5294                         device->target_lun_valid = true;
5295                 }
5296         } else {
5297                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
5298                         sdev_id(sdev), sdev->lun);
5299         }
5300
5301         if (device) {
5302                 sdev->hostdata = device;
5303                 device->sdev = sdev;
5304                 if (device->queue_depth) {
5305                         device->advertised_queue_depth = device->queue_depth;
5306                         scsi_change_queue_depth(sdev,
5307                                 device->advertised_queue_depth);
5308                 }
5309         }
5310
5311         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5312
5313         return 0;
5314 }
5315
5316 static int pqi_map_queues(struct Scsi_Host *shost)
5317 {
5318         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
5319
5320         return blk_mq_pci_map_queues(&shost->tag_set, ctrl_info->pci_dev, 0);
5321 }
5322
5323 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
5324         void __user *arg)
5325 {
5326         struct pci_dev *pci_dev;
5327         u32 subsystem_vendor;
5328         u32 subsystem_device;
5329         cciss_pci_info_struct pciinfo;
5330
5331         if (!arg)
5332                 return -EINVAL;
5333
5334         pci_dev = ctrl_info->pci_dev;
5335
5336         pciinfo.domain = pci_domain_nr(pci_dev->bus);
5337         pciinfo.bus = pci_dev->bus->number;
5338         pciinfo.dev_fn = pci_dev->devfn;
5339         subsystem_vendor = pci_dev->subsystem_vendor;
5340         subsystem_device = pci_dev->subsystem_device;
5341         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
5342                 subsystem_vendor;
5343
5344         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
5345                 return -EFAULT;
5346
5347         return 0;
5348 }
5349
5350 static int pqi_getdrivver_ioctl(void __user *arg)
5351 {
5352         u32 version;
5353
5354         if (!arg)
5355                 return -EINVAL;
5356
5357         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
5358                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
5359
5360         if (copy_to_user(arg, &version, sizeof(version)))
5361                 return -EFAULT;
5362
5363         return 0;
5364 }
5365
5366 struct ciss_error_info {
5367         u8      scsi_status;
5368         int     command_status;
5369         size_t  sense_data_length;
5370 };
5371
5372 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
5373         struct ciss_error_info *ciss_error_info)
5374 {
5375         int ciss_cmd_status;
5376         size_t sense_data_length;
5377
5378         switch (pqi_error_info->data_out_result) {
5379         case PQI_DATA_IN_OUT_GOOD:
5380                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
5381                 break;
5382         case PQI_DATA_IN_OUT_UNDERFLOW:
5383                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
5384                 break;
5385         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
5386                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
5387                 break;
5388         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
5389         case PQI_DATA_IN_OUT_BUFFER_ERROR:
5390         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
5391         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
5392         case PQI_DATA_IN_OUT_ERROR:
5393                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
5394                 break;
5395         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
5396         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
5397         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
5398         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
5399         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
5400         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
5401         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
5402         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
5403         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
5404         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
5405                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
5406                 break;
5407         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
5408                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
5409                 break;
5410         case PQI_DATA_IN_OUT_ABORTED:
5411                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
5412                 break;
5413         case PQI_DATA_IN_OUT_TIMEOUT:
5414                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
5415                 break;
5416         default:
5417                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
5418                 break;
5419         }
5420
5421         sense_data_length =
5422                 get_unaligned_le16(&pqi_error_info->sense_data_length);
5423         if (sense_data_length == 0)
5424                 sense_data_length =
5425                 get_unaligned_le16(&pqi_error_info->response_data_length);
5426         if (sense_data_length)
5427                 if (sense_data_length > sizeof(pqi_error_info->data))
5428                         sense_data_length = sizeof(pqi_error_info->data);
5429
5430         ciss_error_info->scsi_status = pqi_error_info->status;
5431         ciss_error_info->command_status = ciss_cmd_status;
5432         ciss_error_info->sense_data_length = sense_data_length;
5433 }
5434
5435 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5436 {
5437         int rc;
5438         char *kernel_buffer = NULL;
5439         u16 iu_length;
5440         size_t sense_data_length;
5441         IOCTL_Command_struct iocommand;
5442         struct pqi_raid_path_request request;
5443         struct pqi_raid_error_info pqi_error_info;
5444         struct ciss_error_info ciss_error_info;
5445
5446         if (pqi_ctrl_offline(ctrl_info))
5447                 return -ENXIO;
5448         if (!arg)
5449                 return -EINVAL;
5450         if (!capable(CAP_SYS_RAWIO))
5451                 return -EPERM;
5452         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
5453                 return -EFAULT;
5454         if (iocommand.buf_size < 1 &&
5455                 iocommand.Request.Type.Direction != XFER_NONE)
5456                 return -EINVAL;
5457         if (iocommand.Request.CDBLen > sizeof(request.cdb))
5458                 return -EINVAL;
5459         if (iocommand.Request.Type.Type != TYPE_CMD)
5460                 return -EINVAL;
5461
5462         switch (iocommand.Request.Type.Direction) {
5463         case XFER_NONE:
5464         case XFER_WRITE:
5465         case XFER_READ:
5466         case XFER_READ | XFER_WRITE:
5467                 break;
5468         default:
5469                 return -EINVAL;
5470         }
5471
5472         if (iocommand.buf_size > 0) {
5473                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
5474                 if (!kernel_buffer)
5475                         return -ENOMEM;
5476                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
5477                         if (copy_from_user(kernel_buffer, iocommand.buf,
5478                                 iocommand.buf_size)) {
5479                                 rc = -EFAULT;
5480                                 goto out;
5481                         }
5482                 } else {
5483                         memset(kernel_buffer, 0, iocommand.buf_size);
5484                 }
5485         }
5486
5487         memset(&request, 0, sizeof(request));
5488
5489         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5490         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5491                 PQI_REQUEST_HEADER_LENGTH;
5492         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
5493                 sizeof(request.lun_number));
5494         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
5495         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5496
5497         switch (iocommand.Request.Type.Direction) {
5498         case XFER_NONE:
5499                 request.data_direction = SOP_NO_DIRECTION_FLAG;
5500                 break;
5501         case XFER_WRITE:
5502                 request.data_direction = SOP_WRITE_FLAG;
5503                 break;
5504         case XFER_READ:
5505                 request.data_direction = SOP_READ_FLAG;
5506                 break;
5507         case XFER_READ | XFER_WRITE:
5508                 request.data_direction = SOP_BIDIRECTIONAL;
5509                 break;
5510         }
5511
5512         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5513
5514         if (iocommand.buf_size > 0) {
5515                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
5516
5517                 rc = pqi_map_single(ctrl_info->pci_dev,
5518                         &request.sg_descriptors[0], kernel_buffer,
5519                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
5520                 if (rc)
5521                         goto out;
5522
5523                 iu_length += sizeof(request.sg_descriptors[0]);
5524         }
5525
5526         put_unaligned_le16(iu_length, &request.header.iu_length);
5527
5528         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
5529                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
5530
5531         if (iocommand.buf_size > 0)
5532                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
5533                         PCI_DMA_BIDIRECTIONAL);
5534
5535         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
5536
5537         if (rc == 0) {
5538                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
5539                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
5540                 iocommand.error_info.CommandStatus =
5541                         ciss_error_info.command_status;
5542                 sense_data_length = ciss_error_info.sense_data_length;
5543                 if (sense_data_length) {
5544                         if (sense_data_length >
5545                                 sizeof(iocommand.error_info.SenseInfo))
5546                                 sense_data_length =
5547                                         sizeof(iocommand.error_info.SenseInfo);
5548                         memcpy(iocommand.error_info.SenseInfo,
5549                                 pqi_error_info.data, sense_data_length);
5550                         iocommand.error_info.SenseLen = sense_data_length;
5551                 }
5552         }
5553
5554         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
5555                 rc = -EFAULT;
5556                 goto out;
5557         }
5558
5559         if (rc == 0 && iocommand.buf_size > 0 &&
5560                 (iocommand.Request.Type.Direction & XFER_READ)) {
5561                 if (copy_to_user(iocommand.buf, kernel_buffer,
5562                         iocommand.buf_size)) {
5563                         rc = -EFAULT;
5564                 }
5565         }
5566
5567 out:
5568         kfree(kernel_buffer);
5569
5570         return rc;
5571 }
5572
5573 static int pqi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
5574 {
5575         int rc;
5576         struct pqi_ctrl_info *ctrl_info;
5577
5578         ctrl_info = shost_to_hba(sdev->host);
5579
5580         switch (cmd) {
5581         case CCISS_DEREGDISK:
5582         case CCISS_REGNEWDISK:
5583         case CCISS_REGNEWD:
5584                 rc = pqi_scan_scsi_devices(ctrl_info);
5585                 break;
5586         case CCISS_GETPCIINFO:
5587                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
5588                 break;
5589         case CCISS_GETDRIVVER:
5590                 rc = pqi_getdrivver_ioctl(arg);
5591                 break;
5592         case CCISS_PASSTHRU:
5593                 rc = pqi_passthru_ioctl(ctrl_info, arg);
5594                 break;
5595         default:
5596                 rc = -EINVAL;
5597                 break;
5598         }
5599
5600         return rc;
5601 }
5602
5603 static ssize_t pqi_version_show(struct device *dev,
5604         struct device_attribute *attr, char *buffer)
5605 {
5606         ssize_t count = 0;
5607         struct Scsi_Host *shost;
5608         struct pqi_ctrl_info *ctrl_info;
5609
5610         shost = class_to_shost(dev);
5611         ctrl_info = shost_to_hba(shost);
5612
5613         count += snprintf(buffer + count, PAGE_SIZE - count,
5614                 "  driver: %s\n", DRIVER_VERSION BUILD_TIMESTAMP);
5615
5616         count += snprintf(buffer + count, PAGE_SIZE - count,
5617                 "firmware: %s\n", ctrl_info->firmware_version);
5618
5619         return count;
5620 }
5621
5622 static ssize_t pqi_host_rescan_store(struct device *dev,
5623         struct device_attribute *attr, const char *buffer, size_t count)
5624 {
5625         struct Scsi_Host *shost = class_to_shost(dev);
5626
5627         pqi_scan_start(shost);
5628
5629         return count;
5630 }
5631
5632 static ssize_t pqi_lockup_action_show(struct device *dev,
5633         struct device_attribute *attr, char *buffer)
5634 {
5635         int count = 0;
5636         unsigned int i;
5637
5638         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5639                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
5640                         count += snprintf(buffer + count, PAGE_SIZE - count,
5641                                 "[%s] ", pqi_lockup_actions[i].name);
5642                 else
5643                         count += snprintf(buffer + count, PAGE_SIZE - count,
5644                                 "%s ", pqi_lockup_actions[i].name);
5645         }
5646
5647         count += snprintf(buffer + count, PAGE_SIZE - count, "\n");
5648
5649         return count;
5650 }
5651
5652 static ssize_t pqi_lockup_action_store(struct device *dev,
5653         struct device_attribute *attr, const char *buffer, size_t count)
5654 {
5655         unsigned int i;
5656         char *action_name;
5657         char action_name_buffer[32];
5658
5659         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
5660         action_name = strstrip(action_name_buffer);
5661
5662         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5663                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
5664                         pqi_lockup_action = pqi_lockup_actions[i].action;
5665                         return count;
5666                 }
5667         }
5668
5669         return -EINVAL;
5670 }
5671
5672 static DEVICE_ATTR(version, 0444, pqi_version_show, NULL);
5673 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
5674 static DEVICE_ATTR(lockup_action, 0644,
5675         pqi_lockup_action_show, pqi_lockup_action_store);
5676
5677 static struct device_attribute *pqi_shost_attrs[] = {
5678         &dev_attr_version,
5679         &dev_attr_rescan,
5680         &dev_attr_lockup_action,
5681         NULL
5682 };
5683
5684 static ssize_t pqi_sas_address_show(struct device *dev,
5685         struct device_attribute *attr, char *buffer)
5686 {
5687         struct pqi_ctrl_info *ctrl_info;
5688         struct scsi_device *sdev;
5689         struct pqi_scsi_dev *device;
5690         unsigned long flags;
5691         u64 sas_address;
5692
5693         sdev = to_scsi_device(dev);
5694         ctrl_info = shost_to_hba(sdev->host);
5695
5696         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5697
5698         device = sdev->hostdata;
5699         if (pqi_is_logical_device(device)) {
5700                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5701                         flags);
5702                 return -ENODEV;
5703         }
5704         sas_address = device->sas_address;
5705
5706         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5707
5708         return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
5709 }
5710
5711 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
5712         struct device_attribute *attr, char *buffer)
5713 {
5714         struct pqi_ctrl_info *ctrl_info;
5715         struct scsi_device *sdev;
5716         struct pqi_scsi_dev *device;
5717         unsigned long flags;
5718
5719         sdev = to_scsi_device(dev);
5720         ctrl_info = shost_to_hba(sdev->host);
5721
5722         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5723
5724         device = sdev->hostdata;
5725         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
5726         buffer[1] = '\n';
5727         buffer[2] = '\0';
5728
5729         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5730
5731         return 2;
5732 }
5733
5734 static ssize_t pqi_raid_level_show(struct device *dev,
5735         struct device_attribute *attr, char *buffer)
5736 {
5737         struct pqi_ctrl_info *ctrl_info;
5738         struct scsi_device *sdev;
5739         struct pqi_scsi_dev *device;
5740         unsigned long flags;
5741         char *raid_level;
5742
5743         sdev = to_scsi_device(dev);
5744         ctrl_info = shost_to_hba(sdev->host);
5745
5746         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5747
5748         device = sdev->hostdata;
5749
5750         if (pqi_is_logical_device(device))
5751                 raid_level = pqi_raid_level_to_string(device->raid_level);
5752         else
5753                 raid_level = "N/A";
5754
5755         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5756
5757         return snprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
5758 }
5759
5760 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
5761 static DEVICE_ATTR(ssd_smart_path_enabled, 0444,
5762         pqi_ssd_smart_path_enabled_show, NULL);
5763 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
5764
5765 static struct device_attribute *pqi_sdev_attrs[] = {
5766         &dev_attr_sas_address,
5767         &dev_attr_ssd_smart_path_enabled,
5768         &dev_attr_raid_level,
5769         NULL
5770 };
5771
5772 static struct scsi_host_template pqi_driver_template = {
5773         .module = THIS_MODULE,
5774         .name = DRIVER_NAME_SHORT,
5775         .proc_name = DRIVER_NAME_SHORT,
5776         .queuecommand = pqi_scsi_queue_command,
5777         .scan_start = pqi_scan_start,
5778         .scan_finished = pqi_scan_finished,
5779         .this_id = -1,
5780         .use_clustering = ENABLE_CLUSTERING,
5781         .eh_device_reset_handler = pqi_eh_device_reset_handler,
5782         .ioctl = pqi_ioctl,
5783         .slave_alloc = pqi_slave_alloc,
5784         .map_queues = pqi_map_queues,
5785         .sdev_attrs = pqi_sdev_attrs,
5786         .shost_attrs = pqi_shost_attrs,
5787 };
5788
5789 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
5790 {
5791         int rc;
5792         struct Scsi_Host *shost;
5793
5794         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
5795         if (!shost) {
5796                 dev_err(&ctrl_info->pci_dev->dev,
5797                         "scsi_host_alloc failed for controller %u\n",
5798                         ctrl_info->ctrl_id);
5799                 return -ENOMEM;
5800         }
5801
5802         shost->io_port = 0;
5803         shost->n_io_port = 0;
5804         shost->this_id = -1;
5805         shost->max_channel = PQI_MAX_BUS;
5806         shost->max_cmd_len = MAX_COMMAND_SIZE;
5807         shost->max_lun = ~0;
5808         shost->max_id = ~0;
5809         shost->max_sectors = ctrl_info->max_sectors;
5810         shost->can_queue = ctrl_info->scsi_ml_can_queue;
5811         shost->cmd_per_lun = shost->can_queue;
5812         shost->sg_tablesize = ctrl_info->sg_tablesize;
5813         shost->transportt = pqi_sas_transport_template;
5814         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
5815         shost->unique_id = shost->irq;
5816         shost->nr_hw_queues = ctrl_info->num_queue_groups;
5817         shost->hostdata[0] = (unsigned long)ctrl_info;
5818
5819         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
5820         if (rc) {
5821                 dev_err(&ctrl_info->pci_dev->dev,
5822                         "scsi_add_host failed for controller %u\n",
5823                         ctrl_info->ctrl_id);
5824                 goto free_host;
5825         }
5826
5827         rc = pqi_add_sas_host(shost, ctrl_info);
5828         if (rc) {
5829                 dev_err(&ctrl_info->pci_dev->dev,
5830                         "add SAS host failed for controller %u\n",
5831                         ctrl_info->ctrl_id);
5832                 goto remove_host;
5833         }
5834
5835         ctrl_info->scsi_host = shost;
5836
5837         return 0;
5838
5839 remove_host:
5840         scsi_remove_host(shost);
5841 free_host:
5842         scsi_host_put(shost);
5843
5844         return rc;
5845 }
5846
5847 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
5848 {
5849         struct Scsi_Host *shost;
5850
5851         pqi_delete_sas_host(ctrl_info);
5852
5853         shost = ctrl_info->scsi_host;
5854         if (!shost)
5855                 return;
5856
5857         scsi_remove_host(shost);
5858         scsi_host_put(shost);
5859 }
5860
5861 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
5862 {
5863         int rc = 0;
5864         struct pqi_device_registers __iomem *pqi_registers;
5865         unsigned long timeout;
5866         unsigned int timeout_msecs;
5867         union pqi_reset_register reset_reg;
5868
5869         pqi_registers = ctrl_info->pqi_registers;
5870         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
5871         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
5872
5873         while (1) {
5874                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
5875                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
5876                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
5877                         break;
5878                 pqi_check_ctrl_health(ctrl_info);
5879                 if (pqi_ctrl_offline(ctrl_info)) {
5880                         rc = -ENXIO;
5881                         break;
5882                 }
5883                 if (time_after(jiffies, timeout)) {
5884                         rc = -ETIMEDOUT;
5885                         break;
5886                 }
5887         }
5888
5889         return rc;
5890 }
5891
5892 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
5893 {
5894         int rc;
5895         union pqi_reset_register reset_reg;
5896
5897         if (ctrl_info->pqi_reset_quiesce_supported) {
5898                 rc = sis_pqi_reset_quiesce(ctrl_info);
5899                 if (rc) {
5900                         dev_err(&ctrl_info->pci_dev->dev,
5901                                 "PQI reset failed during quiesce with error %d\n",
5902                                 rc);
5903                         return rc;
5904                 }
5905         }
5906
5907         reset_reg.all_bits = 0;
5908         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
5909         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
5910
5911         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
5912
5913         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
5914         if (rc)
5915                 dev_err(&ctrl_info->pci_dev->dev,
5916                         "PQI reset failed with error %d\n", rc);
5917
5918         return rc;
5919 }
5920
5921 static int pqi_get_ctrl_firmware_version(struct pqi_ctrl_info *ctrl_info)
5922 {
5923         int rc;
5924         struct bmic_identify_controller *identify;
5925
5926         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
5927         if (!identify)
5928                 return -ENOMEM;
5929
5930         rc = pqi_identify_controller(ctrl_info, identify);
5931         if (rc)
5932                 goto out;
5933
5934         memcpy(ctrl_info->firmware_version, identify->firmware_version,
5935                 sizeof(identify->firmware_version));
5936         ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
5937         snprintf(ctrl_info->firmware_version +
5938                 strlen(ctrl_info->firmware_version),
5939                 sizeof(ctrl_info->firmware_version),
5940                 "-%u", get_unaligned_le16(&identify->firmware_build_number));
5941
5942 out:
5943         kfree(identify);
5944
5945         return rc;
5946 }
5947
5948 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
5949 {
5950         u32 table_length;
5951         u32 section_offset;
5952         void __iomem *table_iomem_addr;
5953         struct pqi_config_table *config_table;
5954         struct pqi_config_table_section_header *section;
5955
5956         table_length = ctrl_info->config_table_length;
5957
5958         config_table = kmalloc(table_length, GFP_KERNEL);
5959         if (!config_table) {
5960                 dev_err(&ctrl_info->pci_dev->dev,
5961                         "failed to allocate memory for PQI configuration table\n");
5962                 return -ENOMEM;
5963         }
5964
5965         /*
5966          * Copy the config table contents from I/O memory space into the
5967          * temporary buffer.
5968          */
5969         table_iomem_addr = ctrl_info->iomem_base +
5970                 ctrl_info->config_table_offset;
5971         memcpy_fromio(config_table, table_iomem_addr, table_length);
5972
5973         section_offset =
5974                 get_unaligned_le32(&config_table->first_section_offset);
5975
5976         while (section_offset) {
5977                 section = (void *)config_table + section_offset;
5978
5979                 switch (get_unaligned_le16(&section->section_id)) {
5980                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
5981                         if (pqi_disable_heartbeat)
5982                                 dev_warn(&ctrl_info->pci_dev->dev,
5983                                 "heartbeat disabled by module parameter\n");
5984                         else
5985                                 ctrl_info->heartbeat_counter =
5986                                         table_iomem_addr +
5987                                         section_offset +
5988                                         offsetof(
5989                                         struct pqi_config_table_heartbeat,
5990                                                 heartbeat_counter);
5991                         break;
5992                 }
5993
5994                 section_offset =
5995                         get_unaligned_le16(&section->next_section_offset);
5996         }
5997
5998         kfree(config_table);
5999
6000         return 0;
6001 }
6002
6003 /* Switches the controller from PQI mode back into SIS mode. */
6004
6005 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
6006 {
6007         int rc;
6008
6009         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
6010         rc = pqi_reset(ctrl_info);
6011         if (rc)
6012                 return rc;
6013         rc = sis_reenable_sis_mode(ctrl_info);
6014         if (rc) {
6015                 dev_err(&ctrl_info->pci_dev->dev,
6016                         "re-enabling SIS mode failed with error %d\n", rc);
6017                 return rc;
6018         }
6019         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6020
6021         return 0;
6022 }
6023
6024 /*
6025  * If the controller isn't already in SIS mode, this function forces it into
6026  * SIS mode.
6027  */
6028
6029 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
6030 {
6031         if (!sis_is_firmware_running(ctrl_info))
6032                 return -ENXIO;
6033
6034         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
6035                 return 0;
6036
6037         if (sis_is_kernel_up(ctrl_info)) {
6038                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6039                 return 0;
6040         }
6041
6042         return pqi_revert_to_sis_mode(ctrl_info);
6043 }
6044
6045 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
6046 {
6047         int rc;
6048
6049         rc = pqi_force_sis_mode(ctrl_info);
6050         if (rc)
6051                 return rc;
6052
6053         /*
6054          * Wait until the controller is ready to start accepting SIS
6055          * commands.
6056          */
6057         rc = sis_wait_for_ctrl_ready(ctrl_info);
6058         if (rc)
6059                 return rc;
6060
6061         /*
6062          * Get the controller properties.  This allows us to determine
6063          * whether or not it supports PQI mode.
6064          */
6065         rc = sis_get_ctrl_properties(ctrl_info);
6066         if (rc) {
6067                 dev_err(&ctrl_info->pci_dev->dev,
6068                         "error obtaining controller properties\n");
6069                 return rc;
6070         }
6071
6072         rc = sis_get_pqi_capabilities(ctrl_info);
6073         if (rc) {
6074                 dev_err(&ctrl_info->pci_dev->dev,
6075                         "error obtaining controller capabilities\n");
6076                 return rc;
6077         }
6078
6079         if (reset_devices) {
6080                 if (ctrl_info->max_outstanding_requests >
6081                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
6082                         ctrl_info->max_outstanding_requests =
6083                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
6084         } else {
6085                 if (ctrl_info->max_outstanding_requests >
6086                         PQI_MAX_OUTSTANDING_REQUESTS)
6087                         ctrl_info->max_outstanding_requests =
6088                                         PQI_MAX_OUTSTANDING_REQUESTS;
6089         }
6090
6091         pqi_calculate_io_resources(ctrl_info);
6092
6093         rc = pqi_alloc_error_buffer(ctrl_info);
6094         if (rc) {
6095                 dev_err(&ctrl_info->pci_dev->dev,
6096                         "failed to allocate PQI error buffer\n");
6097                 return rc;
6098         }
6099
6100         /*
6101          * If the function we are about to call succeeds, the
6102          * controller will transition from legacy SIS mode
6103          * into PQI mode.
6104          */
6105         rc = sis_init_base_struct_addr(ctrl_info);
6106         if (rc) {
6107                 dev_err(&ctrl_info->pci_dev->dev,
6108                         "error initializing PQI mode\n");
6109                 return rc;
6110         }
6111
6112         /* Wait for the controller to complete the SIS -> PQI transition. */
6113         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6114         if (rc) {
6115                 dev_err(&ctrl_info->pci_dev->dev,
6116                         "transition to PQI mode failed\n");
6117                 return rc;
6118         }
6119
6120         /* From here on, we are running in PQI mode. */
6121         ctrl_info->pqi_mode_enabled = true;
6122         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6123
6124         rc = pqi_process_config_table(ctrl_info);
6125         if (rc)
6126                 return rc;
6127
6128         rc = pqi_alloc_admin_queues(ctrl_info);
6129         if (rc) {
6130                 dev_err(&ctrl_info->pci_dev->dev,
6131                         "failed to allocate admin queues\n");
6132                 return rc;
6133         }
6134
6135         rc = pqi_create_admin_queues(ctrl_info);
6136         if (rc) {
6137                 dev_err(&ctrl_info->pci_dev->dev,
6138                         "error creating admin queues\n");
6139                 return rc;
6140         }
6141
6142         rc = pqi_report_device_capability(ctrl_info);
6143         if (rc) {
6144                 dev_err(&ctrl_info->pci_dev->dev,
6145                         "obtaining device capability failed\n");
6146                 return rc;
6147         }
6148
6149         rc = pqi_validate_device_capability(ctrl_info);
6150         if (rc)
6151                 return rc;
6152
6153         pqi_calculate_queue_resources(ctrl_info);
6154
6155         rc = pqi_enable_msix_interrupts(ctrl_info);
6156         if (rc)
6157                 return rc;
6158
6159         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
6160                 ctrl_info->max_msix_vectors =
6161                         ctrl_info->num_msix_vectors_enabled;
6162                 pqi_calculate_queue_resources(ctrl_info);
6163         }
6164
6165         rc = pqi_alloc_io_resources(ctrl_info);
6166         if (rc)
6167                 return rc;
6168
6169         rc = pqi_alloc_operational_queues(ctrl_info);
6170         if (rc) {
6171                 dev_err(&ctrl_info->pci_dev->dev,
6172                         "failed to allocate operational queues\n");
6173                 return rc;
6174         }
6175
6176         pqi_init_operational_queues(ctrl_info);
6177
6178         rc = pqi_request_irqs(ctrl_info);
6179         if (rc)
6180                 return rc;
6181
6182         rc = pqi_create_queues(ctrl_info);
6183         if (rc)
6184                 return rc;
6185
6186         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6187
6188         ctrl_info->controller_online = true;
6189         pqi_start_heartbeat_timer(ctrl_info);
6190
6191         rc = pqi_enable_events(ctrl_info);
6192         if (rc) {
6193                 dev_err(&ctrl_info->pci_dev->dev,
6194                         "error enabling events\n");
6195                 return rc;
6196         }
6197
6198         /* Register with the SCSI subsystem. */
6199         rc = pqi_register_scsi(ctrl_info);
6200         if (rc)
6201                 return rc;
6202
6203         rc = pqi_get_ctrl_firmware_version(ctrl_info);
6204         if (rc) {
6205                 dev_err(&ctrl_info->pci_dev->dev,
6206                         "error obtaining firmware version\n");
6207                 return rc;
6208         }
6209
6210         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6211         if (rc) {
6212                 dev_err(&ctrl_info->pci_dev->dev,
6213                         "error updating host wellness\n");
6214                 return rc;
6215         }
6216
6217         pqi_schedule_update_time_worker(ctrl_info);
6218
6219         pqi_scan_scsi_devices(ctrl_info);
6220
6221         return 0;
6222 }
6223
6224 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
6225 {
6226         unsigned int i;
6227         struct pqi_admin_queues *admin_queues;
6228         struct pqi_event_queue *event_queue;
6229
6230         admin_queues = &ctrl_info->admin_queues;
6231         admin_queues->iq_pi_copy = 0;
6232         admin_queues->oq_ci_copy = 0;
6233         *admin_queues->oq_pi = 0;
6234
6235         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6236                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
6237                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
6238                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
6239
6240                 *ctrl_info->queue_groups[i].iq_ci[RAID_PATH] = 0;
6241                 *ctrl_info->queue_groups[i].iq_ci[AIO_PATH] = 0;
6242                 *ctrl_info->queue_groups[i].oq_pi = 0;
6243         }
6244
6245         event_queue = &ctrl_info->event_queue;
6246         *event_queue->oq_pi = 0;
6247         event_queue->oq_ci_copy = 0;
6248 }
6249
6250 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
6251 {
6252         int rc;
6253
6254         rc = pqi_force_sis_mode(ctrl_info);
6255         if (rc)
6256                 return rc;
6257
6258         /*
6259          * Wait until the controller is ready to start accepting SIS
6260          * commands.
6261          */
6262         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
6263         if (rc)
6264                 return rc;
6265
6266         /*
6267          * If the function we are about to call succeeds, the
6268          * controller will transition from legacy SIS mode
6269          * into PQI mode.
6270          */
6271         rc = sis_init_base_struct_addr(ctrl_info);
6272         if (rc) {
6273                 dev_err(&ctrl_info->pci_dev->dev,
6274                         "error initializing PQI mode\n");
6275                 return rc;
6276         }
6277
6278         /* Wait for the controller to complete the SIS -> PQI transition. */
6279         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6280         if (rc) {
6281                 dev_err(&ctrl_info->pci_dev->dev,
6282                         "transition to PQI mode failed\n");
6283                 return rc;
6284         }
6285
6286         /* From here on, we are running in PQI mode. */
6287         ctrl_info->pqi_mode_enabled = true;
6288         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6289
6290         pqi_reinit_queues(ctrl_info);
6291
6292         rc = pqi_create_admin_queues(ctrl_info);
6293         if (rc) {
6294                 dev_err(&ctrl_info->pci_dev->dev,
6295                         "error creating admin queues\n");
6296                 return rc;
6297         }
6298
6299         rc = pqi_create_queues(ctrl_info);
6300         if (rc)
6301                 return rc;
6302
6303         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6304
6305         ctrl_info->controller_online = true;
6306         pqi_start_heartbeat_timer(ctrl_info);
6307         pqi_ctrl_unblock_requests(ctrl_info);
6308
6309         rc = pqi_enable_events(ctrl_info);
6310         if (rc) {
6311                 dev_err(&ctrl_info->pci_dev->dev,
6312                         "error enabling events\n");
6313                 return rc;
6314         }
6315
6316         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6317         if (rc) {
6318                 dev_err(&ctrl_info->pci_dev->dev,
6319                         "error updating host wellness\n");
6320                 return rc;
6321         }
6322
6323         pqi_schedule_update_time_worker(ctrl_info);
6324
6325         pqi_scan_scsi_devices(ctrl_info);
6326
6327         return 0;
6328 }
6329
6330 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev,
6331         u16 timeout)
6332 {
6333         return pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
6334                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
6335 }
6336
6337 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
6338 {
6339         int rc;
6340         u64 mask;
6341
6342         rc = pci_enable_device(ctrl_info->pci_dev);
6343         if (rc) {
6344                 dev_err(&ctrl_info->pci_dev->dev,
6345                         "failed to enable PCI device\n");
6346                 return rc;
6347         }
6348
6349         if (sizeof(dma_addr_t) > 4)
6350                 mask = DMA_BIT_MASK(64);
6351         else
6352                 mask = DMA_BIT_MASK(32);
6353
6354         rc = dma_set_mask(&ctrl_info->pci_dev->dev, mask);
6355         if (rc) {
6356                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
6357                 goto disable_device;
6358         }
6359
6360         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
6361         if (rc) {
6362                 dev_err(&ctrl_info->pci_dev->dev,
6363                         "failed to obtain PCI resources\n");
6364                 goto disable_device;
6365         }
6366
6367         ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
6368                 ctrl_info->pci_dev, 0),
6369                 sizeof(struct pqi_ctrl_registers));
6370         if (!ctrl_info->iomem_base) {
6371                 dev_err(&ctrl_info->pci_dev->dev,
6372                         "failed to map memory for controller registers\n");
6373                 rc = -ENOMEM;
6374                 goto release_regions;
6375         }
6376
6377 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
6378
6379         /* Increase the PCIe completion timeout. */
6380         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
6381                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
6382         if (rc) {
6383                 dev_err(&ctrl_info->pci_dev->dev,
6384                         "failed to set PCIe completion timeout\n");
6385                 goto release_regions;
6386         }
6387
6388         /* Enable bus mastering. */
6389         pci_set_master(ctrl_info->pci_dev);
6390
6391         ctrl_info->registers = ctrl_info->iomem_base;
6392         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
6393
6394         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
6395
6396         return 0;
6397
6398 release_regions:
6399         pci_release_regions(ctrl_info->pci_dev);
6400 disable_device:
6401         pci_disable_device(ctrl_info->pci_dev);
6402
6403         return rc;
6404 }
6405
6406 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
6407 {
6408         iounmap(ctrl_info->iomem_base);
6409         pci_release_regions(ctrl_info->pci_dev);
6410         if (pci_is_enabled(ctrl_info->pci_dev))
6411                 pci_disable_device(ctrl_info->pci_dev);
6412         pci_set_drvdata(ctrl_info->pci_dev, NULL);
6413 }
6414
6415 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
6416 {
6417         struct pqi_ctrl_info *ctrl_info;
6418
6419         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
6420                         GFP_KERNEL, numa_node);
6421         if (!ctrl_info)
6422                 return NULL;
6423
6424         mutex_init(&ctrl_info->scan_mutex);
6425         mutex_init(&ctrl_info->lun_reset_mutex);
6426
6427         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
6428         spin_lock_init(&ctrl_info->scsi_device_list_lock);
6429
6430         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
6431         atomic_set(&ctrl_info->num_interrupts, 0);
6432
6433         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
6434         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
6435
6436         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
6437         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
6438
6439         sema_init(&ctrl_info->sync_request_sem,
6440                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
6441         init_waitqueue_head(&ctrl_info->block_requests_wait);
6442
6443         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
6444         spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock);
6445         INIT_WORK(&ctrl_info->raid_bypass_retry_work,
6446                 pqi_raid_bypass_retry_worker);
6447
6448         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
6449         ctrl_info->irq_mode = IRQ_MODE_NONE;
6450         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
6451
6452         return ctrl_info;
6453 }
6454
6455 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
6456 {
6457         kfree(ctrl_info);
6458 }
6459
6460 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
6461 {
6462         pqi_free_irqs(ctrl_info);
6463         pqi_disable_msix_interrupts(ctrl_info);
6464 }
6465
6466 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
6467 {
6468         pqi_stop_heartbeat_timer(ctrl_info);
6469         pqi_free_interrupts(ctrl_info);
6470         if (ctrl_info->queue_memory_base)
6471                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6472                         ctrl_info->queue_memory_length,
6473                         ctrl_info->queue_memory_base,
6474                         ctrl_info->queue_memory_base_dma_handle);
6475         if (ctrl_info->admin_queue_memory_base)
6476                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6477                         ctrl_info->admin_queue_memory_length,
6478                         ctrl_info->admin_queue_memory_base,
6479                         ctrl_info->admin_queue_memory_base_dma_handle);
6480         pqi_free_all_io_requests(ctrl_info);
6481         if (ctrl_info->error_buffer)
6482                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6483                         ctrl_info->error_buffer_length,
6484                         ctrl_info->error_buffer,
6485                         ctrl_info->error_buffer_dma_handle);
6486         if (ctrl_info->iomem_base)
6487                 pqi_cleanup_pci_init(ctrl_info);
6488         pqi_free_ctrl_info(ctrl_info);
6489 }
6490
6491 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
6492 {
6493         pqi_cancel_rescan_worker(ctrl_info);
6494         pqi_cancel_update_time_worker(ctrl_info);
6495         pqi_remove_all_scsi_devices(ctrl_info);
6496         pqi_unregister_scsi(ctrl_info);
6497         if (ctrl_info->pqi_mode_enabled)
6498                 pqi_revert_to_sis_mode(ctrl_info);
6499         pqi_free_ctrl_resources(ctrl_info);
6500 }
6501
6502 static void pqi_perform_lockup_action(void)
6503 {
6504         switch (pqi_lockup_action) {
6505         case PANIC:
6506                 panic("FATAL: Smart Family Controller lockup detected");
6507                 break;
6508         case REBOOT:
6509                 emergency_restart();
6510                 break;
6511         case NONE:
6512         default:
6513                 break;
6514         }
6515 }
6516
6517 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
6518         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
6519         .status = SAM_STAT_CHECK_CONDITION,
6520 };
6521
6522 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
6523 {
6524         unsigned int i;
6525         struct pqi_io_request *io_request;
6526         struct scsi_cmnd *scmd;
6527
6528         for (i = 0; i < ctrl_info->max_io_slots; i++) {
6529                 io_request = &ctrl_info->io_request_pool[i];
6530                 if (atomic_read(&io_request->refcount) == 0)
6531                         continue;
6532
6533                 scmd = io_request->scmd;
6534                 if (scmd) {
6535                         set_host_byte(scmd, DID_NO_CONNECT);
6536                 } else {
6537                         io_request->status = -ENXIO;
6538                         io_request->error_info =
6539                                 &pqi_ctrl_offline_raid_error_info;
6540                 }
6541
6542                 io_request->io_complete_callback(io_request,
6543                         io_request->context);
6544         }
6545 }
6546
6547 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
6548 {
6549         pqi_perform_lockup_action();
6550         pqi_stop_heartbeat_timer(ctrl_info);
6551         pqi_free_interrupts(ctrl_info);
6552         pqi_cancel_rescan_worker(ctrl_info);
6553         pqi_cancel_update_time_worker(ctrl_info);
6554         pqi_ctrl_wait_until_quiesced(ctrl_info);
6555         pqi_fail_all_outstanding_requests(ctrl_info);
6556         pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
6557         pqi_ctrl_unblock_requests(ctrl_info);
6558 }
6559
6560 static void pqi_ctrl_offline_worker(struct work_struct *work)
6561 {
6562         struct pqi_ctrl_info *ctrl_info;
6563
6564         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
6565         pqi_take_ctrl_offline_deferred(ctrl_info);
6566 }
6567
6568 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
6569 {
6570         if (!ctrl_info->controller_online)
6571                 return;
6572
6573         ctrl_info->controller_online = false;
6574         ctrl_info->pqi_mode_enabled = false;
6575         pqi_ctrl_block_requests(ctrl_info);
6576         if (!pqi_disable_ctrl_shutdown)
6577                 sis_shutdown_ctrl(ctrl_info);
6578         pci_disable_device(ctrl_info->pci_dev);
6579         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
6580         schedule_work(&ctrl_info->ctrl_offline_work);
6581 }
6582
6583 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
6584         const struct pci_device_id *id)
6585 {
6586         char *ctrl_description;
6587
6588         if (id->driver_data)
6589                 ctrl_description = (char *)id->driver_data;
6590         else
6591                 ctrl_description = "Microsemi Smart Family Controller";
6592
6593         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
6594 }
6595
6596 static int pqi_pci_probe(struct pci_dev *pci_dev,
6597         const struct pci_device_id *id)
6598 {
6599         int rc;
6600         int node;
6601         struct pqi_ctrl_info *ctrl_info;
6602
6603         pqi_print_ctrl_info(pci_dev, id);
6604
6605         if (pqi_disable_device_id_wildcards &&
6606                 id->subvendor == PCI_ANY_ID &&
6607                 id->subdevice == PCI_ANY_ID) {
6608                 dev_warn(&pci_dev->dev,
6609                         "controller not probed because device ID wildcards are disabled\n");
6610                 return -ENODEV;
6611         }
6612
6613         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
6614                 dev_warn(&pci_dev->dev,
6615                         "controller device ID matched using wildcards\n");
6616
6617         node = dev_to_node(&pci_dev->dev);
6618         if (node == NUMA_NO_NODE)
6619                 set_dev_node(&pci_dev->dev, 0);
6620
6621         ctrl_info = pqi_alloc_ctrl_info(node);
6622         if (!ctrl_info) {
6623                 dev_err(&pci_dev->dev,
6624                         "failed to allocate controller info block\n");
6625                 return -ENOMEM;
6626         }
6627
6628         ctrl_info->pci_dev = pci_dev;
6629
6630         rc = pqi_pci_init(ctrl_info);
6631         if (rc)
6632                 goto error;
6633
6634         rc = pqi_ctrl_init(ctrl_info);
6635         if (rc)
6636                 goto error;
6637
6638         return 0;
6639
6640 error:
6641         pqi_remove_ctrl(ctrl_info);
6642
6643         return rc;
6644 }
6645
6646 static void pqi_pci_remove(struct pci_dev *pci_dev)
6647 {
6648         struct pqi_ctrl_info *ctrl_info;
6649
6650         ctrl_info = pci_get_drvdata(pci_dev);
6651         if (!ctrl_info)
6652                 return;
6653
6654         pqi_remove_ctrl(ctrl_info);
6655 }
6656
6657 static void pqi_shutdown(struct pci_dev *pci_dev)
6658 {
6659         int rc;
6660         struct pqi_ctrl_info *ctrl_info;
6661
6662         ctrl_info = pci_get_drvdata(pci_dev);
6663         if (!ctrl_info)
6664                 goto error;
6665
6666         /*
6667          * Write all data in the controller's battery-backed cache to
6668          * storage.
6669          */
6670         rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
6671         pqi_reset(ctrl_info);
6672         if (rc == 0)
6673                 return;
6674
6675 error:
6676         dev_warn(&pci_dev->dev,
6677                 "unable to flush controller cache\n");
6678 }
6679
6680 static void pqi_process_lockup_action_param(void)
6681 {
6682         unsigned int i;
6683
6684         if (!pqi_lockup_action_param)
6685                 return;
6686
6687         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6688                 if (strcmp(pqi_lockup_action_param,
6689                         pqi_lockup_actions[i].name) == 0) {
6690                         pqi_lockup_action = pqi_lockup_actions[i].action;
6691                         return;
6692                 }
6693         }
6694
6695         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
6696                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
6697 }
6698
6699 static void pqi_process_module_params(void)
6700 {
6701         pqi_process_lockup_action_param();
6702 }
6703
6704 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
6705 {
6706         struct pqi_ctrl_info *ctrl_info;
6707
6708         ctrl_info = pci_get_drvdata(pci_dev);
6709
6710         pqi_disable_events(ctrl_info);
6711         pqi_cancel_update_time_worker(ctrl_info);
6712         pqi_cancel_rescan_worker(ctrl_info);
6713         pqi_wait_until_scan_finished(ctrl_info);
6714         pqi_wait_until_lun_reset_finished(ctrl_info);
6715         pqi_flush_cache(ctrl_info, SUSPEND);
6716         pqi_ctrl_block_requests(ctrl_info);
6717         pqi_ctrl_wait_until_quiesced(ctrl_info);
6718         pqi_wait_until_inbound_queues_empty(ctrl_info);
6719         pqi_ctrl_wait_for_pending_io(ctrl_info);
6720         pqi_stop_heartbeat_timer(ctrl_info);
6721
6722         if (state.event == PM_EVENT_FREEZE)
6723                 return 0;
6724
6725         pci_save_state(pci_dev);
6726         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
6727
6728         ctrl_info->controller_online = false;
6729         ctrl_info->pqi_mode_enabled = false;
6730
6731         return 0;
6732 }
6733
6734 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
6735 {
6736         int rc;
6737         struct pqi_ctrl_info *ctrl_info;
6738
6739         ctrl_info = pci_get_drvdata(pci_dev);
6740
6741         if (pci_dev->current_state != PCI_D0) {
6742                 ctrl_info->max_hw_queue_index = 0;
6743                 pqi_free_interrupts(ctrl_info);
6744                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
6745                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
6746                         IRQF_SHARED, DRIVER_NAME_SHORT,
6747                         &ctrl_info->queue_groups[0]);
6748                 if (rc) {
6749                         dev_err(&ctrl_info->pci_dev->dev,
6750                                 "irq %u init failed with error %d\n",
6751                                 pci_dev->irq, rc);
6752                         return rc;
6753                 }
6754                 pqi_start_heartbeat_timer(ctrl_info);
6755                 pqi_ctrl_unblock_requests(ctrl_info);
6756                 return 0;
6757         }
6758
6759         pci_set_power_state(pci_dev, PCI_D0);
6760         pci_restore_state(pci_dev);
6761
6762         return pqi_ctrl_init_resume(ctrl_info);
6763 }
6764
6765 /* Define the PCI IDs for the controllers that we support. */
6766 static const struct pci_device_id pqi_pci_id_table[] = {
6767         {
6768                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6769                                0x105b, 0x1211)
6770         },
6771         {
6772                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6773                                0x105b, 0x1321)
6774         },
6775         {
6776                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6777                                0x152d, 0x8a22)
6778         },
6779         {
6780                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6781                                0x152d, 0x8a23)
6782         },
6783         {
6784                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6785                                0x152d, 0x8a24)
6786         },
6787         {
6788                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6789                                0x152d, 0x8a36)
6790         },
6791         {
6792                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6793                                0x152d, 0x8a37)
6794         },
6795         {
6796                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6797                                0x193d, 0x8460)
6798         },
6799         {
6800                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6801                                0x193d, 0x8461)
6802         },
6803         {
6804                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6805                                0x193d, 0xf460)
6806         },
6807         {
6808                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6809                                0x193d, 0xf461)
6810         },
6811         {
6812                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6813                                0x1bd4, 0x0045)
6814         },
6815         {
6816                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6817                                0x1bd4, 0x0046)
6818         },
6819         {
6820                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6821                                0x1bd4, 0x0047)
6822         },
6823         {
6824                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6825                                0x1bd4, 0x0048)
6826         },
6827         {
6828                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6829                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
6830         },
6831         {
6832                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6833                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
6834         },
6835         {
6836                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6837                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
6838         },
6839         {
6840                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6841                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
6842         },
6843         {
6844                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6845                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
6846         },
6847         {
6848                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6849                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
6850         },
6851         {
6852                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6853                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
6854         },
6855         {
6856                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6857                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
6858         },
6859         {
6860                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6861                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
6862         },
6863         {
6864                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6865                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
6866         },
6867         {
6868                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6869                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
6870         },
6871         {
6872                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6873                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
6874         },
6875         {
6876                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6877                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
6878         },
6879         {
6880                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6881                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
6882         },
6883         {
6884                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6885                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
6886         },
6887         {
6888                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6889                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
6890         },
6891         {
6892                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6893                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
6894         },
6895         {
6896                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6897                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
6898         },
6899         {
6900                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6901                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
6902         },
6903         {
6904                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6905                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
6906         },
6907         {
6908                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6909                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
6910         },
6911         {
6912                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6913                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
6914         },
6915         {
6916                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6917                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
6918         },
6919         {
6920                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6921                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
6922         },
6923         {
6924                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6925                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
6926         },
6927         {
6928                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6929                                PCI_VENDOR_ID_ADAPTEC2, 0x1282)
6930         },
6931         {
6932                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6933                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
6934         },
6935         {
6936                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6937                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
6938         },
6939         {
6940                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6941                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
6942         },
6943         {
6944                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6945                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
6946         },
6947         {
6948                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6949                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
6950         },
6951         {
6952                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6953                                PCI_VENDOR_ID_DELL, 0x1fe0)
6954         },
6955         {
6956                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6957                                PCI_VENDOR_ID_HP, 0x0600)
6958         },
6959         {
6960                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6961                                PCI_VENDOR_ID_HP, 0x0601)
6962         },
6963         {
6964                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6965                                PCI_VENDOR_ID_HP, 0x0602)
6966         },
6967         {
6968                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6969                                PCI_VENDOR_ID_HP, 0x0603)
6970         },
6971         {
6972                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6973                                PCI_VENDOR_ID_HP, 0x0609)
6974         },
6975         {
6976                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6977                                PCI_VENDOR_ID_HP, 0x0650)
6978         },
6979         {
6980                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6981                                PCI_VENDOR_ID_HP, 0x0651)
6982         },
6983         {
6984                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6985                                PCI_VENDOR_ID_HP, 0x0652)
6986         },
6987         {
6988                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6989                                PCI_VENDOR_ID_HP, 0x0653)
6990         },
6991         {
6992                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6993                                PCI_VENDOR_ID_HP, 0x0654)
6994         },
6995         {
6996                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6997                                PCI_VENDOR_ID_HP, 0x0655)
6998         },
6999         {
7000                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7001                                PCI_VENDOR_ID_HP, 0x0700)
7002         },
7003         {
7004                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7005                                PCI_VENDOR_ID_HP, 0x0701)
7006         },
7007         {
7008                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7009                                PCI_VENDOR_ID_HP, 0x1001)
7010         },
7011         {
7012                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7013                                PCI_VENDOR_ID_HP, 0x1100)
7014         },
7015         {
7016                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7017                                PCI_VENDOR_ID_HP, 0x1101)
7018         },
7019         {
7020                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7021                                PCI_ANY_ID, PCI_ANY_ID)
7022         },
7023         { 0 }
7024 };
7025
7026 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
7027
7028 static struct pci_driver pqi_pci_driver = {
7029         .name = DRIVER_NAME_SHORT,
7030         .id_table = pqi_pci_id_table,
7031         .probe = pqi_pci_probe,
7032         .remove = pqi_pci_remove,
7033         .shutdown = pqi_shutdown,
7034 #if defined(CONFIG_PM)
7035         .suspend = pqi_suspend,
7036         .resume = pqi_resume,
7037 #endif
7038 };
7039
7040 static int __init pqi_init(void)
7041 {
7042         int rc;
7043
7044         pr_info(DRIVER_NAME "\n");
7045
7046         pqi_sas_transport_template =
7047                 sas_attach_transport(&pqi_sas_transport_functions);
7048         if (!pqi_sas_transport_template)
7049                 return -ENODEV;
7050
7051         pqi_process_module_params();
7052
7053         rc = pci_register_driver(&pqi_pci_driver);
7054         if (rc)
7055                 sas_release_transport(pqi_sas_transport_template);
7056
7057         return rc;
7058 }
7059
7060 static void __exit pqi_cleanup(void)
7061 {
7062         pci_unregister_driver(&pqi_pci_driver);
7063         sas_release_transport(pqi_sas_transport_template);
7064 }
7065
7066 module_init(pqi_init);
7067 module_exit(pqi_cleanup);
7068
7069 static void __attribute__((unused)) verify_structures(void)
7070 {
7071         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7072                 sis_host_to_ctrl_doorbell) != 0x20);
7073         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7074                 sis_interrupt_mask) != 0x34);
7075         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7076                 sis_ctrl_to_host_doorbell) != 0x9c);
7077         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7078                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
7079         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7080                 sis_driver_scratch) != 0xb0);
7081         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7082                 sis_firmware_status) != 0xbc);
7083         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7084                 sis_mailbox) != 0x1000);
7085         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7086                 pqi_registers) != 0x4000);
7087
7088         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7089                 iu_type) != 0x0);
7090         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7091                 iu_length) != 0x2);
7092         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7093                 response_queue_id) != 0x4);
7094         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7095                 work_area) != 0x6);
7096         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
7097
7098         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7099                 status) != 0x0);
7100         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7101                 service_response) != 0x1);
7102         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7103                 data_present) != 0x2);
7104         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7105                 reserved) != 0x3);
7106         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7107                 residual_count) != 0x4);
7108         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7109                 data_length) != 0x8);
7110         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7111                 reserved1) != 0xa);
7112         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7113                 data) != 0xc);
7114         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
7115
7116         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7117                 data_in_result) != 0x0);
7118         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7119                 data_out_result) != 0x1);
7120         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7121                 reserved) != 0x2);
7122         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7123                 status) != 0x5);
7124         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7125                 status_qualifier) != 0x6);
7126         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7127                 sense_data_length) != 0x8);
7128         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7129                 response_data_length) != 0xa);
7130         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7131                 data_in_transferred) != 0xc);
7132         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7133                 data_out_transferred) != 0x10);
7134         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7135                 data) != 0x14);
7136         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
7137
7138         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7139                 signature) != 0x0);
7140         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7141                 function_and_status_code) != 0x8);
7142         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7143                 max_admin_iq_elements) != 0x10);
7144         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7145                 max_admin_oq_elements) != 0x11);
7146         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7147                 admin_iq_element_length) != 0x12);
7148         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7149                 admin_oq_element_length) != 0x13);
7150         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7151                 max_reset_timeout) != 0x14);
7152         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7153                 legacy_intx_status) != 0x18);
7154         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7155                 legacy_intx_mask_set) != 0x1c);
7156         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7157                 legacy_intx_mask_clear) != 0x20);
7158         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7159                 device_status) != 0x40);
7160         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7161                 admin_iq_pi_offset) != 0x48);
7162         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7163                 admin_oq_ci_offset) != 0x50);
7164         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7165                 admin_iq_element_array_addr) != 0x58);
7166         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7167                 admin_oq_element_array_addr) != 0x60);
7168         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7169                 admin_iq_ci_addr) != 0x68);
7170         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7171                 admin_oq_pi_addr) != 0x70);
7172         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7173                 admin_iq_num_elements) != 0x78);
7174         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7175                 admin_oq_num_elements) != 0x79);
7176         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7177                 admin_queue_int_msg_num) != 0x7a);
7178         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7179                 device_error) != 0x80);
7180         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7181                 error_details) != 0x88);
7182         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7183                 device_reset) != 0x90);
7184         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7185                 power_action) != 0x94);
7186         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
7187
7188         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7189                 header.iu_type) != 0);
7190         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7191                 header.iu_length) != 2);
7192         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7193                 header.work_area) != 6);
7194         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7195                 request_id) != 8);
7196         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7197                 function_code) != 10);
7198         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7199                 data.report_device_capability.buffer_length) != 44);
7200         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7201                 data.report_device_capability.sg_descriptor) != 48);
7202         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7203                 data.create_operational_iq.queue_id) != 12);
7204         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7205                 data.create_operational_iq.element_array_addr) != 16);
7206         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7207                 data.create_operational_iq.ci_addr) != 24);
7208         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7209                 data.create_operational_iq.num_elements) != 32);
7210         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7211                 data.create_operational_iq.element_length) != 34);
7212         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7213                 data.create_operational_iq.queue_protocol) != 36);
7214         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7215                 data.create_operational_oq.queue_id) != 12);
7216         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7217                 data.create_operational_oq.element_array_addr) != 16);
7218         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7219                 data.create_operational_oq.pi_addr) != 24);
7220         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7221                 data.create_operational_oq.num_elements) != 32);
7222         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7223                 data.create_operational_oq.element_length) != 34);
7224         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7225                 data.create_operational_oq.queue_protocol) != 36);
7226         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7227                 data.create_operational_oq.int_msg_num) != 40);
7228         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7229                 data.create_operational_oq.coalescing_count) != 42);
7230         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7231                 data.create_operational_oq.min_coalescing_time) != 44);
7232         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7233                 data.create_operational_oq.max_coalescing_time) != 48);
7234         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7235                 data.delete_operational_queue.queue_id) != 12);
7236         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
7237         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7238                 data.create_operational_iq) != 64 - 11);
7239         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7240                 data.create_operational_oq) != 64 - 11);
7241         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7242                 data.delete_operational_queue) != 64 - 11);
7243
7244         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7245                 header.iu_type) != 0);
7246         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7247                 header.iu_length) != 2);
7248         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7249                 header.work_area) != 6);
7250         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7251                 request_id) != 8);
7252         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7253                 function_code) != 10);
7254         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7255                 status) != 11);
7256         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7257                 data.create_operational_iq.status_descriptor) != 12);
7258         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7259                 data.create_operational_iq.iq_pi_offset) != 16);
7260         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7261                 data.create_operational_oq.status_descriptor) != 12);
7262         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7263                 data.create_operational_oq.oq_ci_offset) != 16);
7264         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
7265
7266         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7267                 header.iu_type) != 0);
7268         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7269                 header.iu_length) != 2);
7270         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7271                 header.response_queue_id) != 4);
7272         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7273                 header.work_area) != 6);
7274         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7275                 request_id) != 8);
7276         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7277                 nexus_id) != 10);
7278         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7279                 buffer_length) != 12);
7280         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7281                 lun_number) != 16);
7282         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7283                 protocol_specific) != 24);
7284         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7285                 error_index) != 27);
7286         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7287                 cdb) != 32);
7288         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7289                 sg_descriptors) != 64);
7290         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
7291                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7292
7293         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7294                 header.iu_type) != 0);
7295         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7296                 header.iu_length) != 2);
7297         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7298                 header.response_queue_id) != 4);
7299         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7300                 header.work_area) != 6);
7301         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7302                 request_id) != 8);
7303         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7304                 nexus_id) != 12);
7305         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7306                 buffer_length) != 16);
7307         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7308                 data_encryption_key_index) != 22);
7309         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7310                 encrypt_tweak_lower) != 24);
7311         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7312                 encrypt_tweak_upper) != 28);
7313         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7314                 cdb) != 32);
7315         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7316                 error_index) != 48);
7317         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7318                 num_sg_descriptors) != 50);
7319         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7320                 cdb_length) != 51);
7321         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7322                 lun_number) != 52);
7323         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7324                 sg_descriptors) != 64);
7325         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
7326                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7327
7328         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7329                 header.iu_type) != 0);
7330         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7331                 header.iu_length) != 2);
7332         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7333                 request_id) != 8);
7334         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7335                 error_index) != 10);
7336
7337         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7338                 header.iu_type) != 0);
7339         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7340                 header.iu_length) != 2);
7341         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7342                 header.response_queue_id) != 4);
7343         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7344                 request_id) != 8);
7345         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7346                 data.report_event_configuration.buffer_length) != 12);
7347         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7348                 data.report_event_configuration.sg_descriptors) != 16);
7349         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7350                 data.set_event_configuration.global_event_oq_id) != 10);
7351         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7352                 data.set_event_configuration.buffer_length) != 12);
7353         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7354                 data.set_event_configuration.sg_descriptors) != 16);
7355
7356         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7357                 max_inbound_iu_length) != 6);
7358         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7359                 max_outbound_iu_length) != 14);
7360         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
7361
7362         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7363                 data_length) != 0);
7364         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7365                 iq_arbitration_priority_support_bitmask) != 8);
7366         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7367                 maximum_aw_a) != 9);
7368         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7369                 maximum_aw_b) != 10);
7370         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7371                 maximum_aw_c) != 11);
7372         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7373                 max_inbound_queues) != 16);
7374         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7375                 max_elements_per_iq) != 18);
7376         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7377                 max_iq_element_length) != 24);
7378         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7379                 min_iq_element_length) != 26);
7380         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7381                 max_outbound_queues) != 30);
7382         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7383                 max_elements_per_oq) != 32);
7384         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7385                 intr_coalescing_time_granularity) != 34);
7386         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7387                 max_oq_element_length) != 36);
7388         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7389                 min_oq_element_length) != 38);
7390         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7391                 iu_layer_descriptors) != 64);
7392         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
7393
7394         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7395                 event_type) != 0);
7396         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7397                 oq_id) != 2);
7398         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
7399
7400         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7401                 num_event_descriptors) != 2);
7402         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7403                 descriptors) != 4);
7404
7405         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
7406                 ARRAY_SIZE(pqi_supported_event_types));
7407
7408         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7409                 header.iu_type) != 0);
7410         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7411                 header.iu_length) != 2);
7412         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7413                 event_type) != 8);
7414         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7415                 event_id) != 10);
7416         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7417                 additional_event_id) != 12);
7418         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7419                 data) != 16);
7420         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
7421
7422         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7423                 header.iu_type) != 0);
7424         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7425                 header.iu_length) != 2);
7426         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7427                 event_type) != 8);
7428         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7429                 event_id) != 10);
7430         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7431                 additional_event_id) != 12);
7432         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
7433
7434         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7435                 header.iu_type) != 0);
7436         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7437                 header.iu_length) != 2);
7438         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7439                 request_id) != 8);
7440         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7441                 nexus_id) != 10);
7442         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7443                 lun_number) != 16);
7444         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7445                 protocol_specific) != 24);
7446         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7447                 outbound_queue_id_to_manage) != 26);
7448         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7449                 request_id_to_manage) != 28);
7450         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7451                 task_management_function) != 30);
7452         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
7453
7454         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7455                 header.iu_type) != 0);
7456         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7457                 header.iu_length) != 2);
7458         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7459                 request_id) != 8);
7460         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7461                 nexus_id) != 10);
7462         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7463                 additional_response_info) != 12);
7464         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7465                 response_code) != 15);
7466         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
7467
7468         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7469                 configured_logical_drive_count) != 0);
7470         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7471                 configuration_signature) != 1);
7472         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7473                 firmware_version) != 5);
7474         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7475                 extended_logical_unit_count) != 154);
7476         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7477                 firmware_build_number) != 190);
7478         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7479                 controller_mode) != 292);
7480
7481         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7482                 phys_bay_in_box) != 115);
7483         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7484                 device_type) != 120);
7485         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7486                 redundant_path_present_map) != 1736);
7487         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7488                 active_path_number) != 1738);
7489         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7490                 alternate_paths_phys_connector) != 1739);
7491         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7492                 alternate_paths_phys_box_on_port) != 1755);
7493         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7494                 current_queue_depth_limit) != 1796);
7495         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
7496
7497         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
7498         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
7499         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
7500                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7501         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
7502                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7503         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
7504         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
7505                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7506         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
7507         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
7508                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7509
7510         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
7511         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
7512                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
7513 }