drivers/scsi/smartpqi/smartpqi_init.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    driver for Microsemi PQI-based storage controllers
   4  *    Copyright (c) 2019 Microchip Technology Inc. and its subsidiaries
   5  *    Copyright (c) 2016-2018 Microsemi Corporation
   6  *    Copyright (c) 2016 PMC-Sierra, Inc.
   7  *
   8  *    Questions/Comments/Bugfixes to storagedev@microchip.com
   9  *
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/pci.h>
  15 #include <linux/delay.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/sched.h>
  18 #include <linux/rtc.h>
  19 #include <linux/bcd.h>
  20 #include <linux/reboot.h>
  21 #include <linux/cciss_ioctl.h>
  22 #include <linux/blk-mq-pci.h>
  23 #include <scsi/scsi_host.h>
  24 #include <scsi/scsi_cmnd.h>
  25 #include <scsi/scsi_device.h>
  26 #include <scsi/scsi_eh.h>
  27 #include <scsi/scsi_transport_sas.h>
  28 #include <asm/unaligned.h>
  29 #include "smartpqi.h"
  30 #include "smartpqi_sis.h"
  31
  32 #if !defined(BUILD_TIMESTAMP)
  33 #define BUILD_TIMESTAMP
  34 #endif
  35
  36 #define DRIVER_VERSION          "1.2.6-015"
  37 #define DRIVER_MAJOR            1
  38 #define DRIVER_MINOR            2
  39 #define DRIVER_RELEASE          6
  40 #define DRIVER_REVISION         15
  41
  42 #define DRIVER_NAME             "Microsemi PQI Driver (v" \
  43                                 DRIVER_VERSION BUILD_TIMESTAMP ")"
  44 #define DRIVER_NAME_SHORT       "smartpqi"
  45
  46 #define PQI_EXTRA_SGL_MEMORY    (12 * sizeof(struct pqi_sg_descriptor))
  47
  48 MODULE_AUTHOR("Microsemi");
  49 MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
  50         DRIVER_VERSION);
  51 MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
  52 MODULE_VERSION(DRIVER_VERSION);
  53 MODULE_LICENSE("GPL");
  54
  55 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
  56 static void pqi_ctrl_offline_worker(struct work_struct *work);
  57 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info);
  58 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  59 static void pqi_scan_start(struct Scsi_Host *shost);
  60 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  61         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  62         struct pqi_io_request *io_request);
  63 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  64         struct pqi_iu_header *request, unsigned int flags,
  65         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs);
  66 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  67         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  68         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  69         struct pqi_encryption_info *encryption_info, bool raid_bypass);
  70 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
  71 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
  72 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info);
  73 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info,
  74         u32 bytes_requested);
  75 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
  76 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
  77 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
  78         struct pqi_scsi_dev *device, unsigned long timeout_secs);
  79
  80 /* for flags argument to pqi_submit_raid_request_synchronous() */
  81 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
  82
  83 static struct scsi_transport_template *pqi_sas_transport_template;
  84
  85 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  86
  87 enum pqi_lockup_action {
  88         NONE,
  89         REBOOT,
  90         PANIC
  91 };
  92
  93 static enum pqi_lockup_action pqi_lockup_action = NONE;
  94
  95 static struct {
  96         enum pqi_lockup_action  action;
  97         char                    *name;
  98 } pqi_lockup_actions[] = {
  99         {
 100                 .action = NONE,
 101                 .name = "none",
 102         },
 103         {
 104                 .action = REBOOT,
 105                 .name = "reboot",
 106         },
 107         {
 108                 .action = PANIC,
 109                 .name = "panic",
 110         },
 111 };
 112
 113 static unsigned int pqi_supported_event_types[] = {
 114         PQI_EVENT_TYPE_HOTPLUG,
 115         PQI_EVENT_TYPE_HARDWARE,
 116         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 117         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 118         PQI_EVENT_TYPE_OFA,
 119         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 120         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 121 };
 122
 123 static int pqi_disable_device_id_wildcards;
 124 module_param_named(disable_device_id_wildcards,
 125         pqi_disable_device_id_wildcards, int, 0644);
 126 MODULE_PARM_DESC(disable_device_id_wildcards,
 127         "Disable device ID wildcards.");
 128
 129 static int pqi_disable_heartbeat;
 130 module_param_named(disable_heartbeat,
 131         pqi_disable_heartbeat, int, 0644);
 132 MODULE_PARM_DESC(disable_heartbeat,
 133         "Disable heartbeat.");
 134
 135 static int pqi_disable_ctrl_shutdown;
 136 module_param_named(disable_ctrl_shutdown,
 137         pqi_disable_ctrl_shutdown, int, 0644);
 138 MODULE_PARM_DESC(disable_ctrl_shutdown,
 139         "Disable controller shutdown when controller locked up.");
 140
 141 static char *pqi_lockup_action_param;
 142 module_param_named(lockup_action,
 143         pqi_lockup_action_param, charp, 0644);
 144 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 145         "\t\tSupported: none, reboot, panic\n"
 146         "\t\tDefault: none");
 147
 148 static char *raid_levels[] = {
 149         "RAID-0",
 150         "RAID-4",
 151         "RAID-1(1+0)",
 152         "RAID-5",
 153         "RAID-5+1",
 154         "RAID-ADG",
 155         "RAID-1(ADM)",
 156 };
 157
 158 static char *pqi_raid_level_to_string(u8 raid_level)
 159 {
 160         if (raid_level < ARRAY_SIZE(raid_levels))
 161                 return raid_levels[raid_level];
 162
 163         return "RAID UNKNOWN";
 164 }
 165
 166 #define SA_RAID_0               0
 167 #define SA_RAID_4               1
 168 #define SA_RAID_1               2       /* also used for RAID 10 */
 169 #define SA_RAID_5               3       /* also used for RAID 50 */
 170 #define SA_RAID_51              4
 171 #define SA_RAID_6               5       /* also used for RAID 60 */
 172 #define SA_RAID_ADM             6       /* also used for RAID 1+0 ADM */
 173 #define SA_RAID_MAX             SA_RAID_ADM
 174 #define SA_RAID_UNKNOWN         0xff
 175
 176 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 177 {
 178         pqi_prep_for_scsi_done(scmd);
 179         scmd->scsi_done(scmd);
 180 }
 181
 182 static inline void pqi_disable_write_same(struct scsi_device *sdev)
 183 {
 184         sdev->no_write_same = 1;
 185 }
 186
 187 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 188 {
 189         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 190 }
 191
 192 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 193 {
 194         return !device->is_physical_device;
 195 }
 196
 197 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 198 {
 199         return scsi3addr[2] != 0;
 200 }
 201
 202 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 203 {
 204         if (ctrl_info->controller_online)
 205                 if (!sis_is_firmware_running(ctrl_info))
 206                         pqi_take_ctrl_offline(ctrl_info);
 207 }
 208
 209 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 210 {
 211         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 212 }
 213
 214 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(
 215         struct pqi_ctrl_info *ctrl_info)
 216 {
 217         return sis_read_driver_scratch(ctrl_info);
 218 }
 219
 220 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 221         enum pqi_ctrl_mode mode)
 222 {
 223         sis_write_driver_scratch(ctrl_info, mode);
 224 }
 225
 226 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 227 {
 228         ctrl_info->block_requests = true;
 229         scsi_block_requests(ctrl_info->scsi_host);
 230 }
 231
 232 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 233 {
 234         ctrl_info->block_requests = false;
 235         wake_up_all(&ctrl_info->block_requests_wait);
 236         pqi_retry_raid_bypass_requests(ctrl_info);
 237         scsi_unblock_requests(ctrl_info->scsi_host);
 238 }
 239
 240 static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info,
 241         unsigned long timeout_msecs)
 242 {
 243         unsigned long remaining_msecs;
 244
 245         if (!pqi_ctrl_blocked(ctrl_info))
 246                 return timeout_msecs;
 247
 248         atomic_inc(&ctrl_info->num_blocked_threads);
 249
 250         if (timeout_msecs == NO_TIMEOUT) {
 251                 wait_event(ctrl_info->block_requests_wait,
 252                         !pqi_ctrl_blocked(ctrl_info));
 253                 remaining_msecs = timeout_msecs;
 254         } else {
 255                 unsigned long remaining_jiffies;
 256
 257                 remaining_jiffies =
 258                         wait_event_timeout(ctrl_info->block_requests_wait,
 259                                 !pqi_ctrl_blocked(ctrl_info),
 260                                 msecs_to_jiffies(timeout_msecs));
 261                 remaining_msecs = jiffies_to_msecs(remaining_jiffies);
 262         }
 263
 264         atomic_dec(&ctrl_info->num_blocked_threads);
 265
 266         return remaining_msecs;
 267 }
 268
 269 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 270 {
 271         while (atomic_read(&ctrl_info->num_busy_threads) >
 272                 atomic_read(&ctrl_info->num_blocked_threads))
 273                 usleep_range(1000, 2000);
 274 }
 275
 276 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 277 {
 278         return device->device_offline;
 279 }
 280
 281 static inline void pqi_device_reset_start(struct pqi_scsi_dev *device)
 282 {
 283         device->in_reset = true;
 284 }
 285
 286 static inline void pqi_device_reset_done(struct pqi_scsi_dev *device)
 287 {
 288         device->in_reset = false;
 289 }
 290
 291 static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device)
 292 {
 293         return device->in_reset;
 294 }
 295
 296 static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info)
 297 {
 298         ctrl_info->in_ofa = true;
 299 }
 300
 301 static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info)
 302 {
 303         ctrl_info->in_ofa = false;
 304 }
 305
 306 static inline bool pqi_ctrl_in_ofa(struct pqi_ctrl_info *ctrl_info)
 307 {
 308         return ctrl_info->in_ofa;
 309 }
 310
 311 static inline void pqi_device_remove_start(struct pqi_scsi_dev *device)
 312 {
 313         device->in_remove = true;
 314 }
 315
 316 static inline bool pqi_device_in_remove(struct pqi_ctrl_info *ctrl_info,
 317                                         struct pqi_scsi_dev *device)
 318 {
 319         return device->in_remove && !ctrl_info->in_shutdown;
 320 }
 321
 322 static inline void pqi_schedule_rescan_worker_with_delay(
 323         struct pqi_ctrl_info *ctrl_info, unsigned long delay)
 324 {
 325         if (pqi_ctrl_offline(ctrl_info))
 326                 return;
 327         if (pqi_ctrl_in_ofa(ctrl_info))
 328                 return;
 329
 330         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 331 }
 332
 333 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 334 {
 335         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 336 }
 337
 338 #define PQI_RESCAN_WORK_DELAY   (10 * PQI_HZ)
 339
 340 static inline void pqi_schedule_rescan_worker_delayed(
 341         struct pqi_ctrl_info *ctrl_info)
 342 {
 343         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 344 }
 345
 346 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 347 {
 348         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 349 }
 350
 351 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 352 {
 353         if (!ctrl_info->heartbeat_counter)
 354                 return 0;
 355
 356         return readl(ctrl_info->heartbeat_counter);
 357 }
 358
 359 static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 360 {
 361         if (!ctrl_info->soft_reset_status)
 362                 return 0;
 363
 364         return readb(ctrl_info->soft_reset_status);
 365 }
 366
 367 static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info,
 368                                                 u8 clear)
 369 {
 370         u8 status;
 371
 372         if (!ctrl_info->soft_reset_status)
 373                 return;
 374
 375         status = pqi_read_soft_reset_status(ctrl_info);
 376         status &= ~clear;
 377         writeb(status, ctrl_info->soft_reset_status);
 378 }
 379
 380 static int pqi_map_single(struct pci_dev *pci_dev,
 381         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 382         size_t buffer_length, enum dma_data_direction data_direction)
 383 {
 384         dma_addr_t bus_address;
 385
 386         if (!buffer || buffer_length == 0 || data_direction == DMA_NONE)
 387                 return 0;
 388
 389         bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length,
 390                 data_direction);
 391         if (dma_mapping_error(&pci_dev->dev, bus_address))
 392                 return -ENOMEM;
 393
 394         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 395         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 396         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 397
 398         return 0;
 399 }
 400
 401 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 402         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 403         enum dma_data_direction data_direction)
 404 {
 405         int i;
 406
 407         if (data_direction == DMA_NONE)
 408                 return;
 409
 410         for (i = 0; i < num_descriptors; i++)
 411                 dma_unmap_single(&pci_dev->dev,
 412                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 413                         get_unaligned_le32(&descriptors[i].length),
 414                         data_direction);
 415 }
 416
 417 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 418         struct pqi_raid_path_request *request, u8 cmd,
 419         u8 *scsi3addr, void *buffer, size_t buffer_length,
 420         u16 vpd_page, enum dma_data_direction *dir)
 421 {
 422         u8 *cdb;
 423         size_t cdb_length = buffer_length;
 424
 425         memset(request, 0, sizeof(*request));
 426
 427         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 428         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 429                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 430                 &request->header.iu_length);
 431         put_unaligned_le32(buffer_length, &request->buffer_length);
 432         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 433         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 434         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 435
 436         cdb = request->cdb;
 437
 438         switch (cmd) {
 439         case INQUIRY:
 440                 request->data_direction = SOP_READ_FLAG;
 441                 cdb[0] = INQUIRY;
 442                 if (vpd_page & VPD_PAGE) {
 443                         cdb[1] = 0x1;
 444                         cdb[2] = (u8)vpd_page;
 445                 }
 446                 cdb[4] = (u8)cdb_length;
 447                 break;
 448         case CISS_REPORT_LOG:
 449         case CISS_REPORT_PHYS:
 450                 request->data_direction = SOP_READ_FLAG;
 451                 cdb[0] = cmd;
 452                 if (cmd == CISS_REPORT_PHYS)
 453                         cdb[1] = CISS_REPORT_PHYS_EXTENDED;
 454                 else
 455                         cdb[1] = CISS_REPORT_LOG_EXTENDED;
 456                 put_unaligned_be32(cdb_length, &cdb[6]);
 457                 break;
 458         case CISS_GET_RAID_MAP:
 459                 request->data_direction = SOP_READ_FLAG;
 460                 cdb[0] = CISS_READ;
 461                 cdb[1] = CISS_GET_RAID_MAP;
 462                 put_unaligned_be32(cdb_length, &cdb[6]);
 463                 break;
 464         case SA_FLUSH_CACHE:
 465                 request->data_direction = SOP_WRITE_FLAG;
 466                 cdb[0] = BMIC_WRITE;
 467                 cdb[6] = BMIC_FLUSH_CACHE;
 468                 put_unaligned_be16(cdb_length, &cdb[7]);
 469                 break;
 470         case BMIC_SENSE_DIAG_OPTIONS:
 471                 cdb_length = 0;
 472                 /* fall through */
 473         case BMIC_IDENTIFY_CONTROLLER:
 474         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 475                 request->data_direction = SOP_READ_FLAG;
 476                 cdb[0] = BMIC_READ;
 477                 cdb[6] = cmd;
 478                 put_unaligned_be16(cdb_length, &cdb[7]);
 479                 break;
 480         case BMIC_SET_DIAG_OPTIONS:
 481                 cdb_length = 0;
 482                 /* fall through */
 483         case BMIC_WRITE_HOST_WELLNESS:
 484                 request->data_direction = SOP_WRITE_FLAG;
 485                 cdb[0] = BMIC_WRITE;
 486                 cdb[6] = cmd;
 487                 put_unaligned_be16(cdb_length, &cdb[7]);
 488                 break;
 489         case BMIC_CSMI_PASSTHRU:
 490                 request->data_direction = SOP_BIDIRECTIONAL;
 491                 cdb[0] = BMIC_WRITE;
 492                 cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU;
 493                 cdb[6] = cmd;
 494                 put_unaligned_be16(cdb_length, &cdb[7]);
 495                 break;
 496         default:
 497                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n",
 498                         cmd);
 499                 break;
 500         }
 501
 502         switch (request->data_direction) {
 503         case SOP_READ_FLAG:
 504                 *dir = DMA_FROM_DEVICE;
 505                 break;
 506         case SOP_WRITE_FLAG:
 507                 *dir = DMA_TO_DEVICE;
 508                 break;
 509         case SOP_NO_DIRECTION_FLAG:
 510                 *dir = DMA_NONE;
 511                 break;
 512         default:
 513                 *dir = DMA_BIDIRECTIONAL;
 514                 break;
 515         }
 516
 517         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 518                 buffer, buffer_length, *dir);
 519 }
 520
 521 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 522 {
 523         io_request->scmd = NULL;
 524         io_request->status = 0;
 525         io_request->error_info = NULL;
 526         io_request->raid_bypass = false;
 527 }
 528
 529 static struct pqi_io_request *pqi_alloc_io_request(
 530         struct pqi_ctrl_info *ctrl_info)
 531 {
 532         struct pqi_io_request *io_request;
 533         u16 i = ctrl_info->next_io_request_slot;        /* benignly racy */
 534
 535         while (1) {
 536                 io_request = &ctrl_info->io_request_pool[i];
 537                 if (atomic_inc_return(&io_request->refcount) == 1)
 538                         break;
 539                 atomic_dec(&io_request->refcount);
 540                 i = (i + 1) % ctrl_info->max_io_slots;
 541         }
 542
 543         /* benignly racy */
 544         ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 545
 546         pqi_reinit_io_request(io_request);
 547
 548         return io_request;
 549 }
 550
 551 static void pqi_free_io_request(struct pqi_io_request *io_request)
 552 {
 553         atomic_dec(&io_request->refcount);
 554 }
 555
 556 static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 557                 u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page,
 558                 struct pqi_raid_error_info *error_info,
 559                 unsigned long timeout_msecs)
 560 {
 561         int rc;
 562         enum dma_data_direction dir;
 563         struct pqi_raid_path_request request;
 564
 565         rc = pqi_build_raid_path_request(ctrl_info, &request,
 566                 cmd, scsi3addr, buffer,
 567                 buffer_length, vpd_page, &dir);
 568         if (rc)
 569                 return rc;
 570
 571         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 572                  0, error_info, timeout_msecs);
 573
 574         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 575         return rc;
 576 }
 577
 578 /* Helper functions for pqi_send_scsi_raid_request */
 579
 580 static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info,
 581                 u8 cmd, void *buffer, size_t buffer_length)
 582 {
 583         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 584                         buffer, buffer_length, 0, NULL, NO_TIMEOUT);
 585 }
 586
 587 static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info,
 588                 u8 cmd, void *buffer, size_t buffer_length,
 589                 struct pqi_raid_error_info *error_info)
 590 {
 591         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 592                         buffer, buffer_length, 0, error_info, NO_TIMEOUT);
 593 }
 594
 595
 596 static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 597                 struct bmic_identify_controller *buffer)
 598 {
 599         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER,
 600                         buffer, sizeof(*buffer));
 601 }
 602
 603 static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 604         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 605 {
 606         return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr,
 607                 buffer, buffer_length, vpd_page, NULL, NO_TIMEOUT);
 608 }
 609
 610 static bool pqi_vpd_page_supported(struct pqi_ctrl_info *ctrl_info,
 611         u8 *scsi3addr, u16 vpd_page)
 612 {
 613         int rc;
 614         int i;
 615         int pages;
 616         unsigned char *buf, bufsize;
 617
 618         buf = kzalloc(256, GFP_KERNEL);
 619         if (!buf)
 620                 return false;
 621
 622         /* Get the size of the page list first */
 623         rc = pqi_scsi_inquiry(ctrl_info, scsi3addr,
 624                                 VPD_PAGE | SCSI_VPD_SUPPORTED_PAGES,
 625                                 buf, SCSI_VPD_HEADER_SZ);
 626         if (rc != 0)
 627                 goto exit_unsupported;
 628
 629         pages = buf[3];
 630         if ((pages + SCSI_VPD_HEADER_SZ) <= 255)
 631                 bufsize = pages + SCSI_VPD_HEADER_SZ;
 632         else
 633                 bufsize = 255;
 634
 635         /* Get the whole VPD page list */
 636         rc = pqi_scsi_inquiry(ctrl_info, scsi3addr,
 637                                 VPD_PAGE | SCSI_VPD_SUPPORTED_PAGES,
 638                                 buf, bufsize);
 639         if (rc != 0)
 640                 goto exit_unsupported;
 641
 642         pages = buf[3];
 643         for (i = 1; i <= pages; i++)
 644                 if (buf[3 + i] == vpd_page)
 645                         goto exit_supported;
 646
 647 exit_unsupported:
 648         kfree(buf);
 649         return false;
 650
 651 exit_supported:
 652         kfree(buf);
 653         return true;
 654 }
 655
 656 static int pqi_get_device_id(struct pqi_ctrl_info *ctrl_info,
 657         u8 *scsi3addr, u8 *device_id, int buflen)
 658 {
 659         int rc;
 660         unsigned char *buf;
 661
 662         if (!pqi_vpd_page_supported(ctrl_info, scsi3addr, SCSI_VPD_DEVICE_ID))
 663                 return 1; /* function not supported */
 664
 665         buf = kzalloc(64, GFP_KERNEL);
 666         if (!buf)
 667                 return -ENOMEM;
 668
 669         rc = pqi_scsi_inquiry(ctrl_info, scsi3addr,
 670                                 VPD_PAGE | SCSI_VPD_DEVICE_ID,
 671                                 buf, 64);
 672         if (rc == 0) {
 673                 if (buflen > 16)
 674                         buflen = 16;
 675                 memcpy(device_id, &buf[SCSI_VPD_DEVICE_ID_IDX], buflen);
 676         }
 677
 678         kfree(buf);
 679
 680         return rc;
 681 }
 682
 683 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 684         struct pqi_scsi_dev *device,
 685         struct bmic_identify_physical_device *buffer,
 686         size_t buffer_length)
 687 {
 688         int rc;
 689         enum dma_data_direction dir;
 690         u16 bmic_device_index;
 691         struct pqi_raid_path_request request;
 692
 693         rc = pqi_build_raid_path_request(ctrl_info, &request,
 694                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 695                 buffer_length, 0, &dir);
 696         if (rc)
 697                 return rc;
 698
 699         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 700         request.cdb[2] = (u8)bmic_device_index;
 701         request.cdb[9] = (u8)(bmic_device_index >> 8);
 702
 703         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 704                 0, NULL, NO_TIMEOUT);
 705
 706         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 707         return rc;
 708 }
 709
 710 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 711         enum bmic_flush_cache_shutdown_event shutdown_event)
 712 {
 713         int rc;
 714         struct bmic_flush_cache *flush_cache;
 715
 716         /*
 717          * Don't bother trying to flush the cache if the controller is
 718          * locked up.
 719          */
 720         if (pqi_ctrl_offline(ctrl_info))
 721                 return -ENXIO;
 722
 723         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 724         if (!flush_cache)
 725                 return -ENOMEM;
 726
 727         flush_cache->shutdown_event = shutdown_event;
 728
 729         rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache,
 730                 sizeof(*flush_cache));
 731
 732         kfree(flush_cache);
 733
 734         return rc;
 735 }
 736
 737 int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info,
 738         struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length,
 739         struct pqi_raid_error_info *error_info)
 740 {
 741         return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU,
 742                 buffer, buffer_length, error_info);
 743 }
 744
 745 #define PQI_FETCH_PTRAID_DATA (1UL<<31)
 746
 747 static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info)
 748 {
 749         int rc;
 750         struct bmic_diag_options *diag;
 751
 752         diag = kzalloc(sizeof(*diag), GFP_KERNEL);
 753         if (!diag)
 754                 return -ENOMEM;
 755
 756         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS,
 757                                         diag, sizeof(*diag));
 758         if (rc)
 759                 goto out;
 760
 761         diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA);
 762
 763         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS,
 764                                         diag, sizeof(*diag));
 765 out:
 766         kfree(diag);
 767
 768         return rc;
 769 }
 770
 771 static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 772         void *buffer, size_t buffer_length)
 773 {
 774         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS,
 775                                         buffer, buffer_length);
 776 }
 777
 778 #pragma pack(1)
 779
 780 struct bmic_host_wellness_driver_version {
 781         u8      start_tag[4];
 782         u8      driver_version_tag[2];
 783         __le16  driver_version_length;
 784         char    driver_version[32];
 785         u8      dont_write_tag[2];
 786         u8      end_tag[2];
 787 };
 788
 789 #pragma pack()
 790
 791 static int pqi_write_driver_version_to_host_wellness(
 792         struct pqi_ctrl_info *ctrl_info)
 793 {
 794         int rc;
 795         struct bmic_host_wellness_driver_version *buffer;
 796         size_t buffer_length;
 797
 798         buffer_length = sizeof(*buffer);
 799
 800         buffer = kmalloc(buffer_length, GFP_KERNEL);
 801         if (!buffer)
 802                 return -ENOMEM;
 803
 804         buffer->start_tag[0] = '<';
 805         buffer->start_tag[1] = 'H';
 806         buffer->start_tag[2] = 'W';
 807         buffer->start_tag[3] = '>';
 808         buffer->driver_version_tag[0] = 'D';
 809         buffer->driver_version_tag[1] = 'V';
 810         put_unaligned_le16(sizeof(buffer->driver_version),
 811                 &buffer->driver_version_length);
 812         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 813                 sizeof(buffer->driver_version) - 1);
 814         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 815         buffer->dont_write_tag[0] = 'D';
 816         buffer->dont_write_tag[1] = 'W';
 817         buffer->end_tag[0] = 'Z';
 818         buffer->end_tag[1] = 'Z';
 819
 820         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 821
 822         kfree(buffer);
 823
 824         return rc;
 825 }
 826
 827 #pragma pack(1)
 828
 829 struct bmic_host_wellness_time {
 830         u8      start_tag[4];
 831         u8      time_tag[2];
 832         __le16  time_length;
 833         u8      time[8];
 834         u8      dont_write_tag[2];
 835         u8      end_tag[2];
 836 };
 837
 838 #pragma pack()
 839
 840 static int pqi_write_current_time_to_host_wellness(
 841         struct pqi_ctrl_info *ctrl_info)
 842 {
 843         int rc;
 844         struct bmic_host_wellness_time *buffer;
 845         size_t buffer_length;
 846         time64_t local_time;
 847         unsigned int year;
 848         struct tm tm;
 849
 850         buffer_length = sizeof(*buffer);
 851
 852         buffer = kmalloc(buffer_length, GFP_KERNEL);
 853         if (!buffer)
 854                 return -ENOMEM;
 855
 856         buffer->start_tag[0] = '<';
 857         buffer->start_tag[1] = 'H';
 858         buffer->start_tag[2] = 'W';
 859         buffer->start_tag[3] = '>';
 860         buffer->time_tag[0] = 'T';
 861         buffer->time_tag[1] = 'D';
 862         put_unaligned_le16(sizeof(buffer->time),
 863                 &buffer->time_length);
 864
 865         local_time = ktime_get_real_seconds();
 866         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
 867         year = tm.tm_year + 1900;
 868
 869         buffer->time[0] = bin2bcd(tm.tm_hour);
 870         buffer->time[1] = bin2bcd(tm.tm_min);
 871         buffer->time[2] = bin2bcd(tm.tm_sec);
 872         buffer->time[3] = 0;
 873         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
 874         buffer->time[5] = bin2bcd(tm.tm_mday);
 875         buffer->time[6] = bin2bcd(year / 100);
 876         buffer->time[7] = bin2bcd(year % 100);
 877
 878         buffer->dont_write_tag[0] = 'D';
 879         buffer->dont_write_tag[1] = 'W';
 880         buffer->end_tag[0] = 'Z';
 881         buffer->end_tag[1] = 'Z';
 882
 883         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 884
 885         kfree(buffer);
 886
 887         return rc;
 888 }
 889
 890 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * PQI_HZ)
 891
 892 static void pqi_update_time_worker(struct work_struct *work)
 893 {
 894         int rc;
 895         struct pqi_ctrl_info *ctrl_info;
 896
 897         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
 898                 update_time_work);
 899
 900         if (pqi_ctrl_offline(ctrl_info))
 901                 return;
 902
 903         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
 904         if (rc)
 905                 dev_warn(&ctrl_info->pci_dev->dev,
 906                         "error updating time on controller\n");
 907
 908         schedule_delayed_work(&ctrl_info->update_time_work,
 909                 PQI_UPDATE_TIME_WORK_INTERVAL);
 910 }
 911
 912 static inline void pqi_schedule_update_time_worker(
 913         struct pqi_ctrl_info *ctrl_info)
 914 {
 915         schedule_delayed_work(&ctrl_info->update_time_work, 0);
 916 }
 917
 918 static inline void pqi_cancel_update_time_worker(
 919         struct pqi_ctrl_info *ctrl_info)
 920 {
 921         cancel_delayed_work_sync(&ctrl_info->update_time_work);
 922 }
 923
 924 static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 925         void *buffer, size_t buffer_length)
 926 {
 927         return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer,
 928                                         buffer_length);
 929 }
 930
 931 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 932         void **buffer)
 933 {
 934         int rc;
 935         size_t lun_list_length;
 936         size_t lun_data_length;
 937         size_t new_lun_list_length;
 938         void *lun_data = NULL;
 939         struct report_lun_header *report_lun_header;
 940
 941         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
 942         if (!report_lun_header) {
 943                 rc = -ENOMEM;
 944                 goto out;
 945         }
 946
 947         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
 948                 sizeof(*report_lun_header));
 949         if (rc)
 950                 goto out;
 951
 952         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
 953
 954 again:
 955         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
 956
 957         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
 958         if (!lun_data) {
 959                 rc = -ENOMEM;
 960                 goto out;
 961         }
 962
 963         if (lun_list_length == 0) {
 964                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
 965                 goto out;
 966         }
 967
 968         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
 969         if (rc)
 970                 goto out;
 971
 972         new_lun_list_length = get_unaligned_be32(
 973                 &((struct report_lun_header *)lun_data)->list_length);
 974
 975         if (new_lun_list_length > lun_list_length) {
 976                 lun_list_length = new_lun_list_length;
 977                 kfree(lun_data);
 978                 goto again;
 979         }
 980
 981 out:
 982         kfree(report_lun_header);
 983
 984         if (rc) {
 985                 kfree(lun_data);
 986                 lun_data = NULL;
 987         }
 988
 989         *buffer = lun_data;
 990
 991         return rc;
 992 }
 993
 994 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
 995         void **buffer)
 996 {
 997         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
 998                 buffer);
 999 }
1000
1001 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
1002         void **buffer)
1003 {
1004         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
1005 }
1006
1007 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
1008         struct report_phys_lun_extended **physdev_list,
1009         struct report_log_lun_extended **logdev_list)
1010 {
1011         int rc;
1012         size_t logdev_list_length;
1013         size_t logdev_data_length;
1014         struct report_log_lun_extended *internal_logdev_list;
1015         struct report_log_lun_extended *logdev_data;
1016         struct report_lun_header report_lun_header;
1017
1018         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
1019         if (rc)
1020                 dev_err(&ctrl_info->pci_dev->dev,
1021                         "report physical LUNs failed\n");
1022
1023         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
1024         if (rc)
1025                 dev_err(&ctrl_info->pci_dev->dev,
1026                         "report logical LUNs failed\n");
1027
1028         /*
1029          * Tack the controller itself onto the end of the logical device list.
1030          */
1031
1032         logdev_data = *logdev_list;
1033
1034         if (logdev_data) {
1035                 logdev_list_length =
1036                         get_unaligned_be32(&logdev_data->header.list_length);
1037         } else {
1038                 memset(&report_lun_header, 0, sizeof(report_lun_header));
1039                 logdev_data =
1040                         (struct report_log_lun_extended *)&report_lun_header;
1041                 logdev_list_length = 0;
1042         }
1043
1044         logdev_data_length = sizeof(struct report_lun_header) +
1045                 logdev_list_length;
1046
1047         internal_logdev_list = kmalloc(logdev_data_length +
1048                 sizeof(struct report_log_lun_extended), GFP_KERNEL);
1049         if (!internal_logdev_list) {
1050                 kfree(*logdev_list);
1051                 *logdev_list = NULL;
1052                 return -ENOMEM;
1053         }
1054
1055         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
1056         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
1057                 sizeof(struct report_log_lun_extended_entry));
1058         put_unaligned_be32(logdev_list_length +
1059                 sizeof(struct report_log_lun_extended_entry),
1060                 &internal_logdev_list->header.list_length);
1061
1062         kfree(*logdev_list);
1063         *logdev_list = internal_logdev_list;
1064
1065         return 0;
1066 }
1067
1068 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
1069         int bus, int target, int lun)
1070 {
1071         device->bus = bus;
1072         device->target = target;
1073         device->lun = lun;
1074 }
1075
1076 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
1077 {
1078         u8 *scsi3addr;
1079         u32 lunid;
1080         int bus;
1081         int target;
1082         int lun;
1083
1084         scsi3addr = device->scsi3addr;
1085         lunid = get_unaligned_le32(scsi3addr);
1086
1087         if (pqi_is_hba_lunid(scsi3addr)) {
1088                 /* The specified device is the controller. */
1089                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
1090                 device->target_lun_valid = true;
1091                 return;
1092         }
1093
1094         if (pqi_is_logical_device(device)) {
1095                 if (device->is_external_raid_device) {
1096                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
1097                         target = (lunid >> 16) & 0x3fff;
1098                         lun = lunid & 0xff;
1099                 } else {
1100                         bus = PQI_RAID_VOLUME_BUS;
1101                         target = 0;
1102                         lun = lunid & 0x3fff;
1103                 }
1104                 pqi_set_bus_target_lun(device, bus, target, lun);
1105                 device->target_lun_valid = true;
1106                 return;
1107         }
1108
1109         /*
1110          * Defer target and LUN assignment for non-controller physical devices
1111          * because the SAS transport layer will make these assignments later.
1112          */
1113         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
1114 }
1115
1116 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
1117         struct pqi_scsi_dev *device)
1118 {
1119         int rc;
1120         u8 raid_level;
1121         u8 *buffer;
1122
1123         raid_level = SA_RAID_UNKNOWN;
1124
1125         buffer = kmalloc(64, GFP_KERNEL);
1126         if (buffer) {
1127                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1128                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1129                 if (rc == 0) {
1130                         raid_level = buffer[8];
1131                         if (raid_level > SA_RAID_MAX)
1132                                 raid_level = SA_RAID_UNKNOWN;
1133                 }
1134                 kfree(buffer);
1135         }
1136
1137         device->raid_level = raid_level;
1138 }
1139
1140 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1141         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1142 {
1143         char *err_msg;
1144         u32 raid_map_size;
1145         u32 r5or6_blocks_per_row;
1146
1147         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1148
1149         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1150                 err_msg = "RAID map too small";
1151                 goto bad_raid_map;
1152         }
1153
1154         if (device->raid_level == SA_RAID_1) {
1155                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1156                         err_msg = "invalid RAID-1 map";
1157                         goto bad_raid_map;
1158                 }
1159         } else if (device->raid_level == SA_RAID_ADM) {
1160                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1161                         err_msg = "invalid RAID-1(ADM) map";
1162                         goto bad_raid_map;
1163                 }
1164         } else if ((device->raid_level == SA_RAID_5 ||
1165                 device->raid_level == SA_RAID_6) &&
1166                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1167                 /* RAID 50/60 */
1168                 r5or6_blocks_per_row =
1169                         get_unaligned_le16(&raid_map->strip_size) *
1170                         get_unaligned_le16(&raid_map->data_disks_per_row);
1171                 if (r5or6_blocks_per_row == 0) {
1172                         err_msg = "invalid RAID-5 or RAID-6 map";
1173                         goto bad_raid_map;
1174                 }
1175         }
1176
1177         return 0;
1178
1179 bad_raid_map:
1180         dev_warn(&ctrl_info->pci_dev->dev,
1181                 "logical device %08x%08x %s\n",
1182                 *((u32 *)&device->scsi3addr),
1183                 *((u32 *)&device->scsi3addr[4]), err_msg);
1184
1185         return -EINVAL;
1186 }
1187
1188 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1189         struct pqi_scsi_dev *device)
1190 {
1191         int rc;
1192         u32 raid_map_size;
1193         struct raid_map *raid_map;
1194
1195         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1196         if (!raid_map)
1197                 return -ENOMEM;
1198
1199         rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1200                 device->scsi3addr, raid_map, sizeof(*raid_map),
1201                 0, NULL, NO_TIMEOUT);
1202
1203         if (rc)
1204                 goto error;
1205
1206         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1207
1208         if (raid_map_size > sizeof(*raid_map)) {
1209
1210                 kfree(raid_map);
1211
1212                 raid_map = kmalloc(raid_map_size, GFP_KERNEL);
1213                 if (!raid_map)
1214                         return -ENOMEM;
1215
1216                 rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1217                         device->scsi3addr, raid_map, raid_map_size,
1218                         0, NULL, NO_TIMEOUT);
1219                 if (rc)
1220                         goto error;
1221
1222                 if (get_unaligned_le32(&raid_map->structure_size)
1223                         != raid_map_size) {
1224                         dev_warn(&ctrl_info->pci_dev->dev,
1225                                 "Requested %d bytes, received %d bytes",
1226                                 raid_map_size,
1227                                 get_unaligned_le32(&raid_map->structure_size));
1228                         goto error;
1229                 }
1230         }
1231
1232         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1233         if (rc)
1234                 goto error;
1235
1236         device->raid_map = raid_map;
1237
1238         return 0;
1239
1240 error:
1241         kfree(raid_map);
1242
1243         return rc;
1244 }
1245
1246 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1247         struct pqi_scsi_dev *device)
1248 {
1249         int rc;
1250         u8 *buffer;
1251         u8 bypass_status;
1252
1253         buffer = kmalloc(64, GFP_KERNEL);
1254         if (!buffer)
1255                 return;
1256
1257         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1258                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1259         if (rc)
1260                 goto out;
1261
1262 #define RAID_BYPASS_STATUS      4
1263 #define RAID_BYPASS_CONFIGURED  0x1
1264 #define RAID_BYPASS_ENABLED     0x2
1265
1266         bypass_status = buffer[RAID_BYPASS_STATUS];
1267         device->raid_bypass_configured =
1268                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1269         if (device->raid_bypass_configured &&
1270                 (bypass_status & RAID_BYPASS_ENABLED) &&
1271                 pqi_get_raid_map(ctrl_info, device) == 0)
1272                 device->raid_bypass_enabled = true;
1273
1274 out:
1275         kfree(buffer);
1276 }
1277
1278 /*
1279  * Use vendor-specific VPD to determine online/offline status of a volume.
1280  */
1281
1282 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1283         struct pqi_scsi_dev *device)
1284 {
1285         int rc;
1286         size_t page_length;
1287         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1288         bool volume_offline = true;
1289         u32 volume_flags;
1290         struct ciss_vpd_logical_volume_status *vpd;
1291
1292         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1293         if (!vpd)
1294                 goto no_buffer;
1295
1296         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1297                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1298         if (rc)
1299                 goto out;
1300
1301         if (vpd->page_code != CISS_VPD_LV_STATUS)
1302                 goto out;
1303
1304         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1305                 volume_status) + vpd->page_length;
1306         if (page_length < sizeof(*vpd))
1307                 goto out;
1308
1309         volume_status = vpd->volume_status;
1310         volume_flags = get_unaligned_be32(&vpd->flags);
1311         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1312
1313 out:
1314         kfree(vpd);
1315 no_buffer:
1316         device->volume_status = volume_status;
1317         device->volume_offline = volume_offline;
1318 }
1319
1320 #define PQI_INQUIRY_PAGE0_RETRIES       3
1321
1322 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1323         struct pqi_scsi_dev *device)
1324 {
1325         int rc;
1326         u8 *buffer;
1327         unsigned int retries;
1328
1329         if (device->is_expander_smp_device)
1330                 return 0;
1331
1332         buffer = kmalloc(64, GFP_KERNEL);
1333         if (!buffer)
1334                 return -ENOMEM;
1335
1336         /* Send an inquiry to the device to see what it is. */
1337         for (retries = 0;;) {
1338                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0,
1339                         buffer, 64);
1340                 if (rc == 0)
1341                         break;
1342                 if (pqi_is_logical_device(device) ||
1343                         rc != PQI_CMD_STATUS_ABORTED ||
1344                         ++retries > PQI_INQUIRY_PAGE0_RETRIES)
1345                         goto out;
1346         }
1347
1348         scsi_sanitize_inquiry_string(&buffer[8], 8);
1349         scsi_sanitize_inquiry_string(&buffer[16], 16);
1350
1351         device->devtype = buffer[0] & 0x1f;
1352         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1353         memcpy(device->model, &buffer[16], sizeof(device->model));
1354
1355         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
1356                 if (device->is_external_raid_device) {
1357                         device->raid_level = SA_RAID_UNKNOWN;
1358                         device->volume_status = CISS_LV_OK;
1359                         device->volume_offline = false;
1360                 } else {
1361                         pqi_get_raid_level(ctrl_info, device);
1362                         pqi_get_raid_bypass_status(ctrl_info, device);
1363                         pqi_get_volume_status(ctrl_info, device);
1364                 }
1365         }
1366
1367         if (pqi_get_device_id(ctrl_info, device->scsi3addr,
1368                 device->unique_id, sizeof(device->unique_id)) < 0)
1369                 dev_warn(&ctrl_info->pci_dev->dev,
1370                         "Can't get device id for scsi %d:%d:%d:%d\n",
1371                         ctrl_info->scsi_host->host_no,
1372                         device->bus, device->target,
1373                         device->lun);
1374
1375 out:
1376         kfree(buffer);
1377
1378         return rc;
1379 }
1380
1381 static void pqi_get_physical_disk_info(struct pqi_ctrl_info *ctrl_info,
1382         struct pqi_scsi_dev *device,
1383         struct bmic_identify_physical_device *id_phys)
1384 {
1385         int rc;
1386
1387         memset(id_phys, 0, sizeof(*id_phys));
1388
1389         rc = pqi_identify_physical_device(ctrl_info, device,
1390                 id_phys, sizeof(*id_phys));
1391         if (rc) {
1392                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1393                 return;
1394         }
1395
1396         device->queue_depth =
1397                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1398         device->device_type = id_phys->device_type;
1399         device->active_path_index = id_phys->active_path_number;
1400         device->path_map = id_phys->redundant_path_present_map;
1401         memcpy(&device->box,
1402                 &id_phys->alternate_paths_phys_box_on_port,
1403                 sizeof(device->box));
1404         memcpy(&device->phys_connector,
1405                 &id_phys->alternate_paths_phys_connector,
1406                 sizeof(device->phys_connector));
1407         device->bay = id_phys->phys_bay_in_box;
1408 }
1409
1410 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1411         struct pqi_scsi_dev *device)
1412 {
1413         char *status;
1414         static const char unknown_state_str[] =
1415                 "Volume is in an unknown state (%u)";
1416         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1417
1418         switch (device->volume_status) {
1419         case CISS_LV_OK:
1420                 status = "Volume online";
1421                 break;
1422         case CISS_LV_FAILED:
1423                 status = "Volume failed";
1424                 break;
1425         case CISS_LV_NOT_CONFIGURED:
1426                 status = "Volume not configured";
1427                 break;
1428         case CISS_LV_DEGRADED:
1429                 status = "Volume degraded";
1430                 break;
1431         case CISS_LV_READY_FOR_RECOVERY:
1432                 status = "Volume ready for recovery operation";
1433                 break;
1434         case CISS_LV_UNDERGOING_RECOVERY:
1435                 status = "Volume undergoing recovery";
1436                 break;
1437         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1438                 status = "Wrong physical drive was replaced";
1439                 break;
1440         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1441                 status = "A physical drive not properly connected";
1442                 break;
1443         case CISS_LV_HARDWARE_OVERHEATING:
1444                 status = "Hardware is overheating";
1445                 break;
1446         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1447                 status = "Hardware has overheated";
1448                 break;
1449         case CISS_LV_UNDERGOING_EXPANSION:
1450                 status = "Volume undergoing expansion";
1451                 break;
1452         case CISS_LV_NOT_AVAILABLE:
1453                 status = "Volume waiting for transforming volume";
1454                 break;
1455         case CISS_LV_QUEUED_FOR_EXPANSION:
1456                 status = "Volume queued for expansion";
1457                 break;
1458         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1459                 status = "Volume disabled due to SCSI ID conflict";
1460                 break;
1461         case CISS_LV_EJECTED:
1462                 status = "Volume has been ejected";
1463                 break;
1464         case CISS_LV_UNDERGOING_ERASE:
1465                 status = "Volume undergoing background erase";
1466                 break;
1467         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1468                 status = "Volume ready for predictive spare rebuild";
1469                 break;
1470         case CISS_LV_UNDERGOING_RPI:
1471                 status = "Volume undergoing rapid parity initialization";
1472                 break;
1473         case CISS_LV_PENDING_RPI:
1474                 status = "Volume queued for rapid parity initialization";
1475                 break;
1476         case CISS_LV_ENCRYPTED_NO_KEY:
1477                 status = "Encrypted volume inaccessible - key not present";
1478                 break;
1479         case CISS_LV_UNDERGOING_ENCRYPTION:
1480                 status = "Volume undergoing encryption process";
1481                 break;
1482         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1483                 status = "Volume undergoing encryption re-keying process";
1484                 break;
1485         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1486                 status = "Volume encrypted but encryption is disabled";
1487                 break;
1488         case CISS_LV_PENDING_ENCRYPTION:
1489                 status = "Volume pending migration to encrypted state";
1490                 break;
1491         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1492                 status = "Volume pending encryption rekeying";
1493                 break;
1494         case CISS_LV_NOT_SUPPORTED:
1495                 status = "Volume not supported on this controller";
1496                 break;
1497         case CISS_LV_STATUS_UNAVAILABLE:
1498                 status = "Volume status not available";
1499                 break;
1500         default:
1501                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1502                         unknown_state_str, device->volume_status);
1503                 status = unknown_state_buffer;
1504                 break;
1505         }
1506
1507         dev_info(&ctrl_info->pci_dev->dev,
1508                 "scsi %d:%d:%d:%d %s\n",
1509                 ctrl_info->scsi_host->host_no,
1510                 device->bus, device->target, device->lun, status);
1511 }
1512
1513 static void pqi_rescan_worker(struct work_struct *work)
1514 {
1515         struct pqi_ctrl_info *ctrl_info;
1516
1517         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1518                 rescan_work);
1519
1520         pqi_scan_scsi_devices(ctrl_info);
1521 }
1522
1523 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1524         struct pqi_scsi_dev *device)
1525 {
1526         int rc;
1527
1528         if (pqi_is_logical_device(device))
1529                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1530                         device->target, device->lun);
1531         else
1532                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1533
1534         return rc;
1535 }
1536
1537 #define PQI_PENDING_IO_TIMEOUT_SECS     20
1538
1539 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
1540         struct pqi_scsi_dev *device)
1541 {
1542         int rc;
1543
1544         pqi_device_remove_start(device);
1545
1546         rc = pqi_device_wait_for_pending_io(ctrl_info, device,
1547                 PQI_PENDING_IO_TIMEOUT_SECS);
1548         if (rc)
1549                 dev_err(&ctrl_info->pci_dev->dev,
1550                         "scsi %d:%d:%d:%d removing device with %d outstanding commands\n",
1551                         ctrl_info->scsi_host->host_no, device->bus,
1552                         device->target, device->lun,
1553                         atomic_read(&device->scsi_cmds_outstanding));
1554
1555         if (pqi_is_logical_device(device))
1556                 scsi_remove_device(device->sdev);
1557         else
1558                 pqi_remove_sas_device(device);
1559 }
1560
1561 /* Assumes the SCSI device list lock is held. */
1562
1563 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1564         int bus, int target, int lun)
1565 {
1566         struct pqi_scsi_dev *device;
1567
1568         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1569                 scsi_device_list_entry)
1570                 if (device->bus == bus && device->target == target &&
1571                         device->lun == lun)
1572                         return device;
1573
1574         return NULL;
1575 }
1576
1577 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1,
1578         struct pqi_scsi_dev *dev2)
1579 {
1580         if (dev1->is_physical_device != dev2->is_physical_device)
1581                 return false;
1582
1583         if (dev1->is_physical_device)
1584                 return dev1->wwid == dev2->wwid;
1585
1586         return memcmp(dev1->volume_id, dev2->volume_id,
1587                 sizeof(dev1->volume_id)) == 0;
1588 }
1589
1590 enum pqi_find_result {
1591         DEVICE_NOT_FOUND,
1592         DEVICE_CHANGED,
1593         DEVICE_SAME,
1594 };
1595
1596 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1597         struct pqi_scsi_dev *device_to_find,
1598         struct pqi_scsi_dev **matching_device)
1599 {
1600         struct pqi_scsi_dev *device;
1601
1602         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1603                 scsi_device_list_entry) {
1604                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr,
1605                         device->scsi3addr)) {
1606                         *matching_device = device;
1607                         if (pqi_device_equal(device_to_find, device)) {
1608                                 if (device_to_find->volume_offline)
1609                                         return DEVICE_CHANGED;
1610                                 return DEVICE_SAME;
1611                         }
1612                         return DEVICE_CHANGED;
1613                 }
1614         }
1615
1616         return DEVICE_NOT_FOUND;
1617 }
1618
1619 static inline const char *pqi_device_type(struct pqi_scsi_dev *device)
1620 {
1621         if (device->is_expander_smp_device)
1622                 return "Enclosure SMP    ";
1623
1624         return scsi_device_type(device->devtype);
1625 }
1626
1627 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1628
1629 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1630         char *action, struct pqi_scsi_dev *device)
1631 {
1632         ssize_t count;
1633         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1634
1635         count = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1636                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1637
1638         if (device->target_lun_valid)
1639                 count += snprintf(buffer + count,
1640                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1641                         "%d:%d",
1642                         device->target,
1643                         device->lun);
1644         else
1645                 count += snprintf(buffer + count,
1646                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1647                         "-:-");
1648
1649         if (pqi_is_logical_device(device))
1650                 count += snprintf(buffer + count,
1651                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1652                         " %08x%08x",
1653                         *((u32 *)&device->scsi3addr),
1654                         *((u32 *)&device->scsi3addr[4]));
1655         else
1656                 count += snprintf(buffer + count,
1657                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1658                         " %016llx", device->sas_address);
1659
1660         count += snprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1661                 " %s %.8s %.16s ",
1662                 pqi_device_type(device),
1663                 device->vendor,
1664                 device->model);
1665
1666         if (pqi_is_logical_device(device)) {
1667                 if (device->devtype == TYPE_DISK)
1668                         count += snprintf(buffer + count,
1669                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1670                                 "SSDSmartPathCap%c En%c %-12s",
1671                                 device->raid_bypass_configured ? '+' : '-',
1672                                 device->raid_bypass_enabled ? '+' : '-',
1673                                 pqi_raid_level_to_string(device->raid_level));
1674         } else {
1675                 count += snprintf(buffer + count,
1676                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1677                         "AIO%c", device->aio_enabled ? '+' : '-');
1678                 if (device->devtype == TYPE_DISK ||
1679                         device->devtype == TYPE_ZBC)
1680                         count += snprintf(buffer + count,
1681                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1682                                 " qd=%-6d", device->queue_depth);
1683         }
1684
1685         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
1686 }
1687
1688 /* Assumes the SCSI device list lock is held. */
1689
1690 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1691         struct pqi_scsi_dev *new_device)
1692 {
1693         existing_device->devtype = new_device->devtype;
1694         existing_device->device_type = new_device->device_type;
1695         existing_device->bus = new_device->bus;
1696         if (new_device->target_lun_valid) {
1697                 existing_device->target = new_device->target;
1698                 existing_device->lun = new_device->lun;
1699                 existing_device->target_lun_valid = true;
1700         }
1701
1702         /* By definition, the scsi3addr and wwid fields are already the same. */
1703
1704         existing_device->is_physical_device = new_device->is_physical_device;
1705         existing_device->is_external_raid_device =
1706                 new_device->is_external_raid_device;
1707         existing_device->is_expander_smp_device =
1708                 new_device->is_expander_smp_device;
1709         existing_device->aio_enabled = new_device->aio_enabled;
1710         memcpy(existing_device->vendor, new_device->vendor,
1711                 sizeof(existing_device->vendor));
1712         memcpy(existing_device->model, new_device->model,
1713                 sizeof(existing_device->model));
1714         existing_device->sas_address = new_device->sas_address;
1715         existing_device->raid_level = new_device->raid_level;
1716         existing_device->queue_depth = new_device->queue_depth;
1717         existing_device->aio_handle = new_device->aio_handle;
1718         existing_device->volume_status = new_device->volume_status;
1719         existing_device->active_path_index = new_device->active_path_index;
1720         existing_device->path_map = new_device->path_map;
1721         existing_device->bay = new_device->bay;
1722         memcpy(existing_device->box, new_device->box,
1723                 sizeof(existing_device->box));
1724         memcpy(existing_device->phys_connector, new_device->phys_connector,
1725                 sizeof(existing_device->phys_connector));
1726         existing_device->offload_to_mirror = 0;
1727         kfree(existing_device->raid_map);
1728         existing_device->raid_map = new_device->raid_map;
1729         existing_device->raid_bypass_configured =
1730                 new_device->raid_bypass_configured;
1731         existing_device->raid_bypass_enabled =
1732                 new_device->raid_bypass_enabled;
1733         existing_device->device_offline = false;
1734
1735         /* To prevent this from being freed later. */
1736         new_device->raid_map = NULL;
1737 }
1738
1739 static inline void pqi_free_device(struct pqi_scsi_dev *device)
1740 {
1741         if (device) {
1742                 kfree(device->raid_map);
1743                 kfree(device);
1744         }
1745 }
1746
1747 /*
1748  * Called when exposing a new device to the OS fails in order to re-adjust
1749  * our internal SCSI device list to match the SCSI ML's view.
1750  */
1751
1752 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1753         struct pqi_scsi_dev *device)
1754 {
1755         unsigned long flags;
1756
1757         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1758         list_del(&device->scsi_device_list_entry);
1759         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1760
1761         /* Allow the device structure to be freed later. */
1762         device->keep_device = false;
1763 }
1764
1765 static inline bool pqi_is_device_added(struct pqi_scsi_dev *device)
1766 {
1767         if (device->is_expander_smp_device)
1768                 return device->sas_port != NULL;
1769
1770         return device->sdev != NULL;
1771 }
1772
1773 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1774         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1775 {
1776         int rc;
1777         unsigned int i;
1778         unsigned long flags;
1779         enum pqi_find_result find_result;
1780         struct pqi_scsi_dev *device;
1781         struct pqi_scsi_dev *next;
1782         struct pqi_scsi_dev *matching_device;
1783         LIST_HEAD(add_list);
1784         LIST_HEAD(delete_list);
1785
1786         /*
1787          * The idea here is to do as little work as possible while holding the
1788          * spinlock.  That's why we go to great pains to defer anything other
1789          * than updating the internal device list until after we release the
1790          * spinlock.
1791          */
1792
1793         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1794
1795         /* Assume that all devices in the existing list have gone away. */
1796         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1797                 scsi_device_list_entry)
1798                 device->device_gone = true;
1799
1800         for (i = 0; i < num_new_devices; i++) {
1801                 device = new_device_list[i];
1802
1803                 find_result = pqi_scsi_find_entry(ctrl_info, device,
1804                                                 &matching_device);
1805
1806                 switch (find_result) {
1807                 case DEVICE_SAME:
1808                         /*
1809                          * The newly found device is already in the existing
1810                          * device list.
1811                          */
1812                         device->new_device = false;
1813                         matching_device->device_gone = false;
1814                         pqi_scsi_update_device(matching_device, device);
1815                         break;
1816                 case DEVICE_NOT_FOUND:
1817                         /*
1818                          * The newly found device is NOT in the existing device
1819                          * list.
1820                          */
1821                         device->new_device = true;
1822                         break;
1823                 case DEVICE_CHANGED:
1824                         /*
1825                          * The original device has gone away and we need to add
1826                          * the new device.
1827                          */
1828                         device->new_device = true;
1829                         break;
1830                 }
1831         }
1832
1833         /* Process all devices that have gone away. */
1834         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1835                 scsi_device_list_entry) {
1836                 if (device->device_gone) {
1837                         list_del(&device->scsi_device_list_entry);
1838                         list_add_tail(&device->delete_list_entry, &delete_list);
1839                 }
1840         }
1841
1842         /* Process all new devices. */
1843         for (i = 0; i < num_new_devices; i++) {
1844                 device = new_device_list[i];
1845                 if (!device->new_device)
1846                         continue;
1847                 if (device->volume_offline)
1848                         continue;
1849                 list_add_tail(&device->scsi_device_list_entry,
1850                         &ctrl_info->scsi_device_list);
1851                 list_add_tail(&device->add_list_entry, &add_list);
1852                 /* To prevent this device structure from being freed later. */
1853                 device->keep_device = true;
1854         }
1855
1856         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1857
1858         if (pqi_ctrl_in_ofa(ctrl_info))
1859                 pqi_ctrl_ofa_done(ctrl_info);
1860
1861         /* Remove all devices that have gone away. */
1862         list_for_each_entry_safe(device, next, &delete_list,
1863                 delete_list_entry) {
1864                 if (device->volume_offline) {
1865                         pqi_dev_info(ctrl_info, "offline", device);
1866                         pqi_show_volume_status(ctrl_info, device);
1867                 } else {
1868                         pqi_dev_info(ctrl_info, "removed", device);
1869                 }
1870                 if (pqi_is_device_added(device))
1871                         pqi_remove_device(ctrl_info, device);
1872                 list_del(&device->delete_list_entry);
1873                 pqi_free_device(device);
1874         }
1875
1876         /*
1877          * Notify the SCSI ML if the queue depth of any existing device has
1878          * changed.
1879          */
1880         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1881                 scsi_device_list_entry) {
1882                 if (device->sdev && device->queue_depth !=
1883                         device->advertised_queue_depth) {
1884                         device->advertised_queue_depth = device->queue_depth;
1885                         scsi_change_queue_depth(device->sdev,
1886                                 device->advertised_queue_depth);
1887                 }
1888         }
1889
1890         /* Expose any new devices. */
1891         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
1892                 if (!pqi_is_device_added(device)) {
1893                         pqi_dev_info(ctrl_info, "added", device);
1894                         rc = pqi_add_device(ctrl_info, device);
1895                         if (rc) {
1896                                 dev_warn(&ctrl_info->pci_dev->dev,
1897                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
1898                                         ctrl_info->scsi_host->host_no,
1899                                         device->bus, device->target,
1900                                         device->lun);
1901                                 pqi_fixup_botched_add(ctrl_info, device);
1902                         }
1903                 }
1904         }
1905 }
1906
1907 static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
1908 {
1909         bool is_supported;
1910
1911         if (device->is_expander_smp_device)
1912                 return true;
1913
1914         is_supported = false;
1915
1916         switch (device->devtype) {
1917         case TYPE_DISK:
1918         case TYPE_ZBC:
1919         case TYPE_TAPE:
1920         case TYPE_MEDIUM_CHANGER:
1921         case TYPE_ENCLOSURE:
1922                 is_supported = true;
1923                 break;
1924         case TYPE_RAID:
1925                 /*
1926                  * Only support the HBA controller itself as a RAID
1927                  * controller.  If it's a RAID controller other than
1928                  * the HBA itself (an external RAID controller, for
1929                  * example), we don't support it.
1930                  */
1931                 if (pqi_is_hba_lunid(device->scsi3addr))
1932                         is_supported = true;
1933                 break;
1934         }
1935
1936         return is_supported;
1937 }
1938
1939 static inline bool pqi_skip_device(u8 *scsi3addr)
1940 {
1941         /* Ignore all masked devices. */
1942         if (MASKED_DEVICE(scsi3addr))
1943                 return true;
1944
1945         return false;
1946 }
1947
1948 static inline bool pqi_is_device_with_sas_address(struct pqi_scsi_dev *device)
1949 {
1950         if (!device->is_physical_device)
1951                 return false;
1952
1953         if (device->is_expander_smp_device)
1954                 return true;
1955
1956         switch (device->devtype) {
1957         case TYPE_DISK:
1958         case TYPE_ZBC:
1959         case TYPE_ENCLOSURE:
1960                 return true;
1961         }
1962
1963         return false;
1964 }
1965
1966 static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
1967 {
1968         return !device->is_physical_device ||
1969                 !pqi_skip_device(device->scsi3addr);
1970 }
1971
1972 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1973 {
1974         int i;
1975         int rc;
1976         LIST_HEAD(new_device_list_head);
1977         struct report_phys_lun_extended *physdev_list = NULL;
1978         struct report_log_lun_extended *logdev_list = NULL;
1979         struct report_phys_lun_extended_entry *phys_lun_ext_entry;
1980         struct report_log_lun_extended_entry *log_lun_ext_entry;
1981         struct bmic_identify_physical_device *id_phys = NULL;
1982         u32 num_physicals;
1983         u32 num_logicals;
1984         struct pqi_scsi_dev **new_device_list = NULL;
1985         struct pqi_scsi_dev *device;
1986         struct pqi_scsi_dev *next;
1987         unsigned int num_new_devices;
1988         unsigned int num_valid_devices;
1989         bool is_physical_device;
1990         u8 *scsi3addr;
1991         static char *out_of_memory_msg =
1992                 "failed to allocate memory, device discovery stopped";
1993
1994         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
1995         if (rc)
1996                 goto out;
1997
1998         if (physdev_list)
1999                 num_physicals =
2000                         get_unaligned_be32(&physdev_list->header.list_length)
2001                                 / sizeof(physdev_list->lun_entries[0]);
2002         else
2003                 num_physicals = 0;
2004
2005         if (logdev_list)
2006                 num_logicals =
2007                         get_unaligned_be32(&logdev_list->header.list_length)
2008                                 / sizeof(logdev_list->lun_entries[0]);
2009         else
2010                 num_logicals = 0;
2011
2012         if (num_physicals) {
2013                 /*
2014                  * We need this buffer for calls to pqi_get_physical_disk_info()
2015                  * below.  We allocate it here instead of inside
2016                  * pqi_get_physical_disk_info() because it's a fairly large
2017                  * buffer.
2018                  */
2019                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
2020                 if (!id_phys) {
2021                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2022                                 out_of_memory_msg);
2023                         rc = -ENOMEM;
2024                         goto out;
2025                 }
2026         }
2027
2028         num_new_devices = num_physicals + num_logicals;
2029
2030         new_device_list = kmalloc_array(num_new_devices,
2031                                         sizeof(*new_device_list),
2032                                         GFP_KERNEL);
2033         if (!new_device_list) {
2034                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
2035                 rc = -ENOMEM;
2036                 goto out;
2037         }
2038
2039         for (i = 0; i < num_new_devices; i++) {
2040                 device = kzalloc(sizeof(*device), GFP_KERNEL);
2041                 if (!device) {
2042                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2043                                 out_of_memory_msg);
2044                         rc = -ENOMEM;
2045                         goto out;
2046                 }
2047                 list_add_tail(&device->new_device_list_entry,
2048                         &new_device_list_head);
2049         }
2050
2051         device = NULL;
2052         num_valid_devices = 0;
2053
2054         for (i = 0; i < num_new_devices; i++) {
2055
2056                 if (i < num_physicals) {
2057                         is_physical_device = true;
2058                         phys_lun_ext_entry = &physdev_list->lun_entries[i];
2059                         log_lun_ext_entry = NULL;
2060                         scsi3addr = phys_lun_ext_entry->lunid;
2061                 } else {
2062                         is_physical_device = false;
2063                         phys_lun_ext_entry = NULL;
2064                         log_lun_ext_entry =
2065                                 &logdev_list->lun_entries[i - num_physicals];
2066                         scsi3addr = log_lun_ext_entry->lunid;
2067                 }
2068
2069                 if (is_physical_device && pqi_skip_device(scsi3addr))
2070                         continue;
2071
2072                 if (device)
2073                         device = list_next_entry(device, new_device_list_entry);
2074                 else
2075                         device = list_first_entry(&new_device_list_head,
2076                                 struct pqi_scsi_dev, new_device_list_entry);
2077
2078                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
2079                 device->is_physical_device = is_physical_device;
2080                 if (is_physical_device) {
2081                         if (phys_lun_ext_entry->device_type ==
2082                                 SA_EXPANDER_SMP_DEVICE)
2083                                 device->is_expander_smp_device = true;
2084                 } else {
2085                         device->is_external_raid_device =
2086                                 pqi_is_external_raid_addr(scsi3addr);
2087                 }
2088
2089                 /* Gather information about the device. */
2090                 rc = pqi_get_device_info(ctrl_info, device);
2091                 if (rc == -ENOMEM) {
2092                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2093                                 out_of_memory_msg);
2094                         goto out;
2095                 }
2096                 if (rc) {
2097                         if (device->is_physical_device)
2098                                 dev_warn(&ctrl_info->pci_dev->dev,
2099                                         "obtaining device info failed, skipping physical device %016llx\n",
2100                                         get_unaligned_be64(
2101                                                 &phys_lun_ext_entry->wwid));
2102                         else
2103                                 dev_warn(&ctrl_info->pci_dev->dev,
2104                                         "obtaining device info failed, skipping logical device %08x%08x\n",
2105                                         *((u32 *)&device->scsi3addr),
2106                                         *((u32 *)&device->scsi3addr[4]));
2107                         rc = 0;
2108                         continue;
2109                 }
2110
2111                 if (!pqi_is_supported_device(device))
2112                         continue;
2113
2114                 pqi_assign_bus_target_lun(device);
2115
2116                 if (device->is_physical_device) {
2117                         device->wwid = phys_lun_ext_entry->wwid;
2118                         if ((phys_lun_ext_entry->device_flags &
2119                                 REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
2120                                 phys_lun_ext_entry->aio_handle) {
2121                                 device->aio_enabled = true;
2122                                         device->aio_handle =
2123                                                 phys_lun_ext_entry->aio_handle;
2124                         }
2125                         if (device->devtype == TYPE_DISK ||
2126                                 device->devtype == TYPE_ZBC) {
2127                                 pqi_get_physical_disk_info(ctrl_info,
2128                                         device, id_phys);
2129                         }
2130                 } else {
2131                         memcpy(device->volume_id, log_lun_ext_entry->volume_id,
2132                                 sizeof(device->volume_id));
2133                 }
2134
2135                 if (pqi_is_device_with_sas_address(device))
2136                         device->sas_address = get_unaligned_be64(&device->wwid);
2137
2138                 new_device_list[num_valid_devices++] = device;
2139         }
2140
2141         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
2142
2143 out:
2144         list_for_each_entry_safe(device, next, &new_device_list_head,
2145                 new_device_list_entry) {
2146                 if (device->keep_device)
2147                         continue;
2148                 list_del(&device->new_device_list_entry);
2149                 pqi_free_device(device);
2150         }
2151
2152         kfree(new_device_list);
2153         kfree(physdev_list);
2154         kfree(logdev_list);
2155         kfree(id_phys);
2156
2157         return rc;
2158 }
2159
2160 static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2161 {
2162         unsigned long flags;
2163         struct pqi_scsi_dev *device;
2164
2165         while (1) {
2166                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2167
2168                 device = list_first_entry_or_null(&ctrl_info->scsi_device_list,
2169                         struct pqi_scsi_dev, scsi_device_list_entry);
2170                 if (device)
2171                         list_del(&device->scsi_device_list_entry);
2172
2173                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
2174                         flags);
2175
2176                 if (!device)
2177                         break;
2178
2179                 if (pqi_is_device_added(device))
2180                         pqi_remove_device(ctrl_info, device);
2181                 pqi_free_device(device);
2182         }
2183 }
2184
2185 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2186 {
2187         int rc;
2188
2189         if (pqi_ctrl_offline(ctrl_info))
2190                 return -ENXIO;
2191
2192         mutex_lock(&ctrl_info->scan_mutex);
2193
2194         rc = pqi_update_scsi_devices(ctrl_info);
2195         if (rc)
2196                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2197
2198         mutex_unlock(&ctrl_info->scan_mutex);
2199
2200         return rc;
2201 }
2202
2203 static void pqi_scan_start(struct Scsi_Host *shost)
2204 {
2205         struct pqi_ctrl_info *ctrl_info;
2206
2207         ctrl_info = shost_to_hba(shost);
2208         if (pqi_ctrl_in_ofa(ctrl_info))
2209                 return;
2210
2211         pqi_scan_scsi_devices(ctrl_info);
2212 }
2213
2214 /* Returns TRUE if scan is finished. */
2215
2216 static int pqi_scan_finished(struct Scsi_Host *shost,
2217         unsigned long elapsed_time)
2218 {
2219         struct pqi_ctrl_info *ctrl_info;
2220
2221         ctrl_info = shost_priv(shost);
2222
2223         return !mutex_is_locked(&ctrl_info->scan_mutex);
2224 }
2225
2226 static void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info)
2227 {
2228         mutex_lock(&ctrl_info->scan_mutex);
2229         mutex_unlock(&ctrl_info->scan_mutex);
2230 }
2231
2232 static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info)
2233 {
2234         mutex_lock(&ctrl_info->lun_reset_mutex);
2235         mutex_unlock(&ctrl_info->lun_reset_mutex);
2236 }
2237
2238 static void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info)
2239 {
2240         mutex_lock(&ctrl_info->ofa_mutex);
2241         mutex_unlock(&ctrl_info->ofa_mutex);
2242 }
2243
2244 static inline void pqi_set_encryption_info(
2245         struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
2246         u64 first_block)
2247 {
2248         u32 volume_blk_size;
2249
2250         /*
2251          * Set the encryption tweak values based on logical block address.
2252          * If the block size is 512, the tweak value is equal to the LBA.
2253          * For other block sizes, tweak value is (LBA * block size) / 512.
2254          */
2255         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2256         if (volume_blk_size != 512)
2257                 first_block = (first_block * volume_blk_size) / 512;
2258
2259         encryption_info->data_encryption_key_index =
2260                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2261         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2262         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2263 }
2264
2265 /*
2266  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2267  */
2268
2269 #define PQI_RAID_BYPASS_INELIGIBLE      1
2270
2271 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2272         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2273         struct pqi_queue_group *queue_group)
2274 {
2275         struct raid_map *raid_map;
2276         bool is_write = false;
2277         u32 map_index;
2278         u64 first_block;
2279         u64 last_block;
2280         u32 block_cnt;
2281         u32 blocks_per_row;
2282         u64 first_row;
2283         u64 last_row;
2284         u32 first_row_offset;
2285         u32 last_row_offset;
2286         u32 first_column;
2287         u32 last_column;
2288         u64 r0_first_row;
2289         u64 r0_last_row;
2290         u32 r5or6_blocks_per_row;
2291         u64 r5or6_first_row;
2292         u64 r5or6_last_row;
2293         u32 r5or6_first_row_offset;
2294         u32 r5or6_last_row_offset;
2295         u32 r5or6_first_column;
2296         u32 r5or6_last_column;
2297         u16 data_disks_per_row;
2298         u32 total_disks_per_row;
2299         u16 layout_map_count;
2300         u32 stripesize;
2301         u16 strip_size;
2302         u32 first_group;
2303         u32 last_group;
2304         u32 current_group;
2305         u32 map_row;
2306         u32 aio_handle;
2307         u64 disk_block;
2308         u32 disk_block_cnt;
2309         u8 cdb[16];
2310         u8 cdb_length;
2311         int offload_to_mirror;
2312         struct pqi_encryption_info *encryption_info_ptr;
2313         struct pqi_encryption_info encryption_info;
2314 #if BITS_PER_LONG == 32
2315         u64 tmpdiv;
2316 #endif
2317
2318         /* Check for valid opcode, get LBA and block count. */
2319         switch (scmd->cmnd[0]) {
2320         case WRITE_6:
2321                 is_write = true;
2322                 /* fall through */
2323         case READ_6:
2324                 first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2325                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2326                 block_cnt = (u32)scmd->cmnd[4];
2327                 if (block_cnt == 0)
2328                         block_cnt = 256;
2329                 break;
2330         case WRITE_10:
2331                 is_write = true;
2332                 /* fall through */
2333         case READ_10:
2334                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2335                 block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2336                 break;
2337         case WRITE_12:
2338                 is_write = true;
2339                 /* fall through */
2340         case READ_12:
2341                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2342                 block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2343                 break;
2344         case WRITE_16:
2345                 is_write = true;
2346                 /* fall through */
2347         case READ_16:
2348                 first_block = get_unaligned_be64(&scmd->cmnd[2]);
2349                 block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2350                 break;
2351         default:
2352                 /* Process via normal I/O path. */
2353                 return PQI_RAID_BYPASS_INELIGIBLE;
2354         }
2355
2356         /* Check for write to non-RAID-0. */
2357         if (is_write && device->raid_level != SA_RAID_0)
2358                 return PQI_RAID_BYPASS_INELIGIBLE;
2359
2360         if (unlikely(block_cnt == 0))
2361                 return PQI_RAID_BYPASS_INELIGIBLE;
2362
2363         last_block = first_block + block_cnt - 1;
2364         raid_map = device->raid_map;
2365
2366         /* Check for invalid block or wraparound. */
2367         if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2368                 last_block < first_block)
2369                 return PQI_RAID_BYPASS_INELIGIBLE;
2370
2371         data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
2372         strip_size = get_unaligned_le16(&raid_map->strip_size);
2373         layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2374
2375         /* Calculate stripe information for the request. */
2376         blocks_per_row = data_disks_per_row * strip_size;
2377 #if BITS_PER_LONG == 32
2378         tmpdiv = first_block;
2379         do_div(tmpdiv, blocks_per_row);
2380         first_row = tmpdiv;
2381         tmpdiv = last_block;
2382         do_div(tmpdiv, blocks_per_row);
2383         last_row = tmpdiv;
2384         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2385         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2386         tmpdiv = first_row_offset;
2387         do_div(tmpdiv, strip_size);
2388         first_column = tmpdiv;
2389         tmpdiv = last_row_offset;
2390         do_div(tmpdiv, strip_size);
2391         last_column = tmpdiv;
2392 #else
2393         first_row = first_block / blocks_per_row;
2394         last_row = last_block / blocks_per_row;
2395         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2396         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2397         first_column = first_row_offset / strip_size;
2398         last_column = last_row_offset / strip_size;
2399 #endif
2400
2401         /* If this isn't a single row/column then give to the controller. */
2402         if (first_row != last_row || first_column != last_column)
2403                 return PQI_RAID_BYPASS_INELIGIBLE;
2404
2405         /* Proceeding with driver mapping. */
2406         total_disks_per_row = data_disks_per_row +
2407                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2408         map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2409                 get_unaligned_le16(&raid_map->row_cnt);
2410         map_index = (map_row * total_disks_per_row) + first_column;
2411
2412         /* RAID 1 */
2413         if (device->raid_level == SA_RAID_1) {
2414                 if (device->offload_to_mirror)
2415                         map_index += data_disks_per_row;
2416                 device->offload_to_mirror = !device->offload_to_mirror;
2417         } else if (device->raid_level == SA_RAID_ADM) {
2418                 /* RAID ADM */
2419                 /*
2420                  * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
2421                  * divisible by 3.
2422                  */
2423                 offload_to_mirror = device->offload_to_mirror;
2424                 if (offload_to_mirror == 0)  {
2425                         /* use physical disk in the first mirrored group. */
2426                         map_index %= data_disks_per_row;
2427                 } else {
2428                         do {
2429                                 /*
2430                                  * Determine mirror group that map_index
2431                                  * indicates.
2432                                  */
2433                                 current_group = map_index / data_disks_per_row;
2434
2435                                 if (offload_to_mirror != current_group) {
2436                                         if (current_group <
2437                                                 layout_map_count - 1) {
2438                                                 /*
2439                                                  * Select raid index from
2440                                                  * next group.
2441                                                  */
2442                                                 map_index += data_disks_per_row;
2443                                                 current_group++;
2444                                         } else {
2445                                                 /*
2446                                                  * Select raid index from first
2447                                                  * group.
2448                                                  */
2449                                                 map_index %= data_disks_per_row;
2450                                                 current_group = 0;
2451                                         }
2452                                 }
2453                         } while (offload_to_mirror != current_group);
2454                 }
2455
2456                 /* Set mirror group to use next time. */
2457                 offload_to_mirror =
2458                         (offload_to_mirror >= layout_map_count - 1) ?
2459                                 0 : offload_to_mirror + 1;
2460                 WARN_ON(offload_to_mirror >= layout_map_count);
2461                 device->offload_to_mirror = offload_to_mirror;
2462                 /*
2463                  * Avoid direct use of device->offload_to_mirror within this
2464                  * function since multiple threads might simultaneously
2465                  * increment it beyond the range of device->layout_map_count -1.
2466                  */
2467         } else if ((device->raid_level == SA_RAID_5 ||
2468                 device->raid_level == SA_RAID_6) && layout_map_count > 1) {
2469                 /* RAID 50/60 */
2470                 /* Verify first and last block are in same RAID group */
2471                 r5or6_blocks_per_row = strip_size * data_disks_per_row;
2472                 stripesize = r5or6_blocks_per_row * layout_map_count;
2473 #if BITS_PER_LONG == 32
2474                 tmpdiv = first_block;
2475                 first_group = do_div(tmpdiv, stripesize);
2476                 tmpdiv = first_group;
2477                 do_div(tmpdiv, r5or6_blocks_per_row);
2478                 first_group = tmpdiv;
2479                 tmpdiv = last_block;
2480                 last_group = do_div(tmpdiv, stripesize);
2481                 tmpdiv = last_group;
2482                 do_div(tmpdiv, r5or6_blocks_per_row);
2483                 last_group = tmpdiv;
2484 #else
2485                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
2486                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
2487 #endif
2488                 if (first_group != last_group)
2489                         return PQI_RAID_BYPASS_INELIGIBLE;
2490
2491                 /* Verify request is in a single row of RAID 5/6 */
2492 #if BITS_PER_LONG == 32
2493                 tmpdiv = first_block;
2494                 do_div(tmpdiv, stripesize);
2495                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
2496                 tmpdiv = last_block;
2497                 do_div(tmpdiv, stripesize);
2498                 r5or6_last_row = r0_last_row = tmpdiv;
2499 #else
2500                 first_row = r5or6_first_row = r0_first_row =
2501                         first_block / stripesize;
2502                 r5or6_last_row = r0_last_row = last_block / stripesize;
2503 #endif
2504                 if (r5or6_first_row != r5or6_last_row)
2505                         return PQI_RAID_BYPASS_INELIGIBLE;
2506
2507                 /* Verify request is in a single column */
2508 #if BITS_PER_LONG == 32
2509                 tmpdiv = first_block;
2510                 first_row_offset = do_div(tmpdiv, stripesize);
2511                 tmpdiv = first_row_offset;
2512                 first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
2513                 r5or6_first_row_offset = first_row_offset;
2514                 tmpdiv = last_block;
2515                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
2516                 tmpdiv = r5or6_last_row_offset;
2517                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
2518                 tmpdiv = r5or6_first_row_offset;
2519                 do_div(tmpdiv, strip_size);
2520                 first_column = r5or6_first_column = tmpdiv;
2521                 tmpdiv = r5or6_last_row_offset;
2522                 do_div(tmpdiv, strip_size);
2523                 r5or6_last_column = tmpdiv;
2524 #else
2525                 first_row_offset = r5or6_first_row_offset =
2526                         (u32)((first_block % stripesize) %
2527                         r5or6_blocks_per_row);
2528
2529                 r5or6_last_row_offset =
2530                         (u32)((last_block % stripesize) %
2531                         r5or6_blocks_per_row);
2532
2533                 first_column = r5or6_first_row_offset / strip_size;
2534                 r5or6_first_column = first_column;
2535                 r5or6_last_column = r5or6_last_row_offset / strip_size;
2536 #endif
2537                 if (r5or6_first_column != r5or6_last_column)
2538                         return PQI_RAID_BYPASS_INELIGIBLE;
2539
2540                 /* Request is eligible */
2541                 map_row =
2542                         ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2543                         get_unaligned_le16(&raid_map->row_cnt);
2544
2545                 map_index = (first_group *
2546                         (get_unaligned_le16(&raid_map->row_cnt) *
2547                         total_disks_per_row)) +
2548                         (map_row * total_disks_per_row) + first_column;
2549         }
2550
2551         aio_handle = raid_map->disk_data[map_index].aio_handle;
2552         disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2553                 first_row * strip_size +
2554                 (first_row_offset - first_column * strip_size);
2555         disk_block_cnt = block_cnt;
2556
2557         /* Handle differing logical/physical block sizes. */
2558         if (raid_map->phys_blk_shift) {
2559                 disk_block <<= raid_map->phys_blk_shift;
2560                 disk_block_cnt <<= raid_map->phys_blk_shift;
2561         }
2562
2563         if (unlikely(disk_block_cnt > 0xffff))
2564                 return PQI_RAID_BYPASS_INELIGIBLE;
2565
2566         /* Build the new CDB for the physical disk I/O. */
2567         if (disk_block > 0xffffffff) {
2568                 cdb[0] = is_write ? WRITE_16 : READ_16;
2569                 cdb[1] = 0;
2570                 put_unaligned_be64(disk_block, &cdb[2]);
2571                 put_unaligned_be32(disk_block_cnt, &cdb[10]);
2572                 cdb[14] = 0;
2573                 cdb[15] = 0;
2574                 cdb_length = 16;
2575         } else {
2576                 cdb[0] = is_write ? WRITE_10 : READ_10;
2577                 cdb[1] = 0;
2578                 put_unaligned_be32((u32)disk_block, &cdb[2]);
2579                 cdb[6] = 0;
2580                 put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
2581                 cdb[9] = 0;
2582                 cdb_length = 10;
2583         }
2584
2585         if (get_unaligned_le16(&raid_map->flags) &
2586                 RAID_MAP_ENCRYPTION_ENABLED) {
2587                 pqi_set_encryption_info(&encryption_info, raid_map,
2588                         first_block);
2589                 encryption_info_ptr = &encryption_info;
2590         } else {
2591                 encryption_info_ptr = NULL;
2592         }
2593
2594         return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
2595                 cdb, cdb_length, queue_group, encryption_info_ptr, true);
2596 }
2597
2598 #define PQI_STATUS_IDLE         0x0
2599
2600 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
2601 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
2602
2603 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
2604 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
2605 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
2606 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
2607 #define PQI_DEVICE_STATE_ERROR                          0x4
2608
2609 #define PQI_MODE_READY_TIMEOUT_SECS             30
2610 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
2611
2612 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2613 {
2614         struct pqi_device_registers __iomem *pqi_registers;
2615         unsigned long timeout;
2616         u64 signature;
2617         u8 status;
2618
2619         pqi_registers = ctrl_info->pqi_registers;
2620         timeout = (PQI_MODE_READY_TIMEOUT_SECS * PQI_HZ) + jiffies;
2621
2622         while (1) {
2623                 signature = readq(&pqi_registers->signature);
2624                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2625                         sizeof(signature)) == 0)
2626                         break;
2627                 if (time_after(jiffies, timeout)) {
2628                         dev_err(&ctrl_info->pci_dev->dev,
2629                                 "timed out waiting for PQI signature\n");
2630                         return -ETIMEDOUT;
2631                 }
2632                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2633         }
2634
2635         while (1) {
2636                 status = readb(&pqi_registers->function_and_status_code);
2637                 if (status == PQI_STATUS_IDLE)
2638                         break;
2639                 if (time_after(jiffies, timeout)) {
2640                         dev_err(&ctrl_info->pci_dev->dev,
2641                                 "timed out waiting for PQI IDLE\n");
2642                         return -ETIMEDOUT;
2643                 }
2644                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2645         }
2646
2647         while (1) {
2648                 if (readl(&pqi_registers->device_status) ==
2649                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2650                         break;
2651                 if (time_after(jiffies, timeout)) {
2652                         dev_err(&ctrl_info->pci_dev->dev,
2653                                 "timed out waiting for PQI all registers ready\n");
2654                         return -ETIMEDOUT;
2655                 }
2656                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2657         }
2658
2659         return 0;
2660 }
2661
2662 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2663 {
2664         struct pqi_scsi_dev *device;
2665
2666         device = io_request->scmd->device->hostdata;
2667         device->raid_bypass_enabled = false;
2668         device->aio_enabled = false;
2669 }
2670
2671 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
2672 {
2673         struct pqi_ctrl_info *ctrl_info;
2674         struct pqi_scsi_dev *device;
2675
2676         device = sdev->hostdata;
2677         if (device->device_offline)
2678                 return;
2679
2680         device->device_offline = true;
2681         ctrl_info = shost_to_hba(sdev->host);
2682         pqi_schedule_rescan_worker(ctrl_info);
2683         dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n",
2684                 path, ctrl_info->scsi_host->host_no, device->bus,
2685                 device->target, device->lun);
2686 }
2687
2688 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2689 {
2690         u8 scsi_status;
2691         u8 host_byte;
2692         struct scsi_cmnd *scmd;
2693         struct pqi_raid_error_info *error_info;
2694         size_t sense_data_length;
2695         int residual_count;
2696         int xfer_count;
2697         struct scsi_sense_hdr sshdr;
2698
2699         scmd = io_request->scmd;
2700         if (!scmd)
2701                 return;
2702
2703         error_info = io_request->error_info;
2704         scsi_status = error_info->status;
2705         host_byte = DID_OK;
2706
2707         switch (error_info->data_out_result) {
2708         case PQI_DATA_IN_OUT_GOOD:
2709                 break;
2710         case PQI_DATA_IN_OUT_UNDERFLOW:
2711                 xfer_count =
2712                         get_unaligned_le32(&error_info->data_out_transferred);
2713                 residual_count = scsi_bufflen(scmd) - xfer_count;
2714                 scsi_set_resid(scmd, residual_count);
2715                 if (xfer_count < scmd->underflow)
2716                         host_byte = DID_SOFT_ERROR;
2717                 break;
2718         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
2719         case PQI_DATA_IN_OUT_ABORTED:
2720                 host_byte = DID_ABORT;
2721                 break;
2722         case PQI_DATA_IN_OUT_TIMEOUT:
2723                 host_byte = DID_TIME_OUT;
2724                 break;
2725         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
2726         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
2727         case PQI_DATA_IN_OUT_BUFFER_ERROR:
2728         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
2729         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
2730         case PQI_DATA_IN_OUT_ERROR:
2731         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
2732         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
2733         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
2734         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
2735         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
2736         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
2737         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
2738         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
2739         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
2740         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
2741         default:
2742                 host_byte = DID_ERROR;
2743                 break;
2744         }
2745
2746         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2747         if (sense_data_length == 0)
2748                 sense_data_length =
2749                         get_unaligned_le16(&error_info->response_data_length);
2750         if (sense_data_length) {
2751                 if (sense_data_length > sizeof(error_info->data))
2752                         sense_data_length = sizeof(error_info->data);
2753
2754                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
2755                         scsi_normalize_sense(error_info->data,
2756                                 sense_data_length, &sshdr) &&
2757                                 sshdr.sense_key == HARDWARE_ERROR &&
2758                                 sshdr.asc == 0x3e &&
2759                                 sshdr.ascq == 0x1) {
2760                         struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host);
2761                         struct pqi_scsi_dev *device = scmd->device->hostdata;
2762
2763                         if (printk_ratelimit())
2764                                 scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
2765                                         ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
2766                         pqi_take_device_offline(scmd->device, "RAID");
2767                         host_byte = DID_NO_CONNECT;
2768                 }
2769
2770                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2771                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
2772                 memcpy(scmd->sense_buffer, error_info->data,
2773                         sense_data_length);
2774         }
2775
2776         scmd->result = scsi_status;
2777         set_host_byte(scmd, host_byte);
2778 }
2779
2780 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
2781 {
2782         u8 scsi_status;
2783         u8 host_byte;
2784         struct scsi_cmnd *scmd;
2785         struct pqi_aio_error_info *error_info;
2786         size_t sense_data_length;
2787         int residual_count;
2788         int xfer_count;
2789         bool device_offline;
2790
2791         scmd = io_request->scmd;
2792         error_info = io_request->error_info;
2793         host_byte = DID_OK;
2794         sense_data_length = 0;
2795         device_offline = false;
2796
2797         switch (error_info->service_response) {
2798         case PQI_AIO_SERV_RESPONSE_COMPLETE:
2799                 scsi_status = error_info->status;
2800                 break;
2801         case PQI_AIO_SERV_RESPONSE_FAILURE:
2802                 switch (error_info->status) {
2803                 case PQI_AIO_STATUS_IO_ABORTED:
2804                         scsi_status = SAM_STAT_TASK_ABORTED;
2805                         break;
2806                 case PQI_AIO_STATUS_UNDERRUN:
2807                         scsi_status = SAM_STAT_GOOD;
2808                         residual_count = get_unaligned_le32(
2809                                                 &error_info->residual_count);
2810                         scsi_set_resid(scmd, residual_count);
2811                         xfer_count = scsi_bufflen(scmd) - residual_count;
2812                         if (xfer_count < scmd->underflow)
2813                                 host_byte = DID_SOFT_ERROR;
2814                         break;
2815                 case PQI_AIO_STATUS_OVERRUN:
2816                         scsi_status = SAM_STAT_GOOD;
2817                         break;
2818                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
2819                         pqi_aio_path_disabled(io_request);
2820                         scsi_status = SAM_STAT_GOOD;
2821                         io_request->status = -EAGAIN;
2822                         break;
2823                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
2824                 case PQI_AIO_STATUS_INVALID_DEVICE:
2825                         if (!io_request->raid_bypass) {
2826                                 device_offline = true;
2827                                 pqi_take_device_offline(scmd->device, "AIO");
2828                                 host_byte = DID_NO_CONNECT;
2829                         }
2830                         scsi_status = SAM_STAT_CHECK_CONDITION;
2831                         break;
2832                 case PQI_AIO_STATUS_IO_ERROR:
2833                 default:
2834                         scsi_status = SAM_STAT_CHECK_CONDITION;
2835                         break;
2836                 }
2837                 break;
2838         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
2839         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
2840                 scsi_status = SAM_STAT_GOOD;
2841                 break;
2842         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
2843         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
2844         default:
2845                 scsi_status = SAM_STAT_CHECK_CONDITION;
2846                 break;
2847         }
2848
2849         if (error_info->data_present) {
2850                 sense_data_length =
2851                         get_unaligned_le16(&error_info->data_length);
2852                 if (sense_data_length) {
2853                         if (sense_data_length > sizeof(error_info->data))
2854                                 sense_data_length = sizeof(error_info->data);
2855                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2856                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
2857                         memcpy(scmd->sense_buffer, error_info->data,
2858                                 sense_data_length);
2859                 }
2860         }
2861
2862         if (device_offline && sense_data_length == 0)
2863                 scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR,
2864                         0x3e, 0x1);
2865
2866         scmd->result = scsi_status;
2867         set_host_byte(scmd, host_byte);
2868 }
2869
2870 static void pqi_process_io_error(unsigned int iu_type,
2871         struct pqi_io_request *io_request)
2872 {
2873         switch (iu_type) {
2874         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2875                 pqi_process_raid_io_error(io_request);
2876                 break;
2877         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2878                 pqi_process_aio_io_error(io_request);
2879                 break;
2880         }
2881 }
2882
2883 static int pqi_interpret_task_management_response(
2884         struct pqi_task_management_response *response)
2885 {
2886         int rc;
2887
2888         switch (response->response_code) {
2889         case SOP_TMF_COMPLETE:
2890         case SOP_TMF_FUNCTION_SUCCEEDED:
2891                 rc = 0;
2892                 break;
2893         case SOP_TMF_REJECTED:
2894                 rc = -EAGAIN;
2895                 break;
2896         default:
2897                 rc = -EIO;
2898                 break;
2899         }
2900
2901         return rc;
2902 }
2903
2904 static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
2905         struct pqi_queue_group *queue_group)
2906 {
2907         unsigned int num_responses;
2908         pqi_index_t oq_pi;
2909         pqi_index_t oq_ci;
2910         struct pqi_io_request *io_request;
2911         struct pqi_io_response *response;
2912         u16 request_id;
2913
2914         num_responses = 0;
2915         oq_ci = queue_group->oq_ci_copy;
2916
2917         while (1) {
2918                 oq_pi = readl(queue_group->oq_pi);
2919                 if (oq_pi == oq_ci)
2920                         break;
2921
2922                 num_responses++;
2923                 response = queue_group->oq_element_array +
2924                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
2925
2926                 request_id = get_unaligned_le16(&response->request_id);
2927                 WARN_ON(request_id >= ctrl_info->max_io_slots);
2928
2929                 io_request = &ctrl_info->io_request_pool[request_id];
2930                 WARN_ON(atomic_read(&io_request->refcount) == 0);
2931
2932                 switch (response->header.iu_type) {
2933                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
2934                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
2935                         if (io_request->scmd)
2936                                 io_request->scmd->result = 0;
2937                         /* fall through */
2938                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
2939                         break;
2940                 case PQI_RESPONSE_IU_VENDOR_GENERAL:
2941                         io_request->status =
2942                                 get_unaligned_le16(
2943                                 &((struct pqi_vendor_general_response *)
2944                                         response)->status);
2945                         break;
2946                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
2947                         io_request->status =
2948                                 pqi_interpret_task_management_response(
2949                                         (void *)response);
2950                         break;
2951                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
2952                         pqi_aio_path_disabled(io_request);
2953                         io_request->status = -EAGAIN;
2954                         break;
2955                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2956                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2957                         io_request->error_info = ctrl_info->error_buffer +
2958                                 (get_unaligned_le16(&response->error_index) *
2959                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
2960                         pqi_process_io_error(response->header.iu_type,
2961                                 io_request);
2962                         break;
2963                 default:
2964                         dev_err(&ctrl_info->pci_dev->dev,
2965                                 "unexpected IU type: 0x%x\n",
2966                                 response->header.iu_type);
2967                         break;
2968                 }
2969
2970                 io_request->io_complete_callback(io_request,
2971                         io_request->context);
2972
2973                 /*
2974                  * Note that the I/O request structure CANNOT BE TOUCHED after
2975                  * returning from the I/O completion callback!
2976                  */
2977
2978                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
2979         }
2980
2981         if (num_responses) {
2982                 queue_group->oq_ci_copy = oq_ci;
2983                 writel(oq_ci, queue_group->oq_ci);
2984         }
2985
2986         return num_responses;
2987 }
2988
2989 static inline unsigned int pqi_num_elements_free(unsigned int pi,
2990         unsigned int ci, unsigned int elements_in_queue)
2991 {
2992         unsigned int num_elements_used;
2993
2994         if (pi >= ci)
2995                 num_elements_used = pi - ci;
2996         else
2997                 num_elements_used = elements_in_queue - ci + pi;
2998
2999         return elements_in_queue - num_elements_used - 1;
3000 }
3001
3002 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
3003         struct pqi_event_acknowledge_request *iu, size_t iu_length)
3004 {
3005         pqi_index_t iq_pi;
3006         pqi_index_t iq_ci;
3007         unsigned long flags;
3008         void *next_element;
3009         struct pqi_queue_group *queue_group;
3010
3011         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
3012         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
3013
3014         while (1) {
3015                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
3016
3017                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
3018                 iq_ci = readl(queue_group->iq_ci[RAID_PATH]);
3019
3020                 if (pqi_num_elements_free(iq_pi, iq_ci,
3021                         ctrl_info->num_elements_per_iq))
3022                         break;
3023
3024                 spin_unlock_irqrestore(
3025                         &queue_group->submit_lock[RAID_PATH], flags);
3026
3027                 if (pqi_ctrl_offline(ctrl_info))
3028                         return;
3029         }
3030
3031         next_element = queue_group->iq_element_array[RAID_PATH] +
3032                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3033
3034         memcpy(next_element, iu, iu_length);
3035
3036         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
3037         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
3038
3039         /*
3040          * This write notifies the controller that an IU is available to be
3041          * processed.
3042          */
3043         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
3044
3045         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
3046 }
3047
3048 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
3049         struct pqi_event *event)
3050 {
3051         struct pqi_event_acknowledge_request request;
3052
3053         memset(&request, 0, sizeof(request));
3054
3055         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
3056         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
3057                 &request.header.iu_length);
3058         request.event_type = event->event_type;
3059         request.event_id = event->event_id;
3060         request.additional_event_id = event->additional_event_id;
3061
3062         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
3063 }
3064
3065 #define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS              30
3066 #define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS        1
3067
3068 static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status(
3069         struct pqi_ctrl_info *ctrl_info)
3070 {
3071         unsigned long timeout;
3072         u8 status;
3073
3074         timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * PQI_HZ) + jiffies;
3075
3076         while (1) {
3077                 status = pqi_read_soft_reset_status(ctrl_info);
3078                 if (status & PQI_SOFT_RESET_INITIATE)
3079                         return RESET_INITIATE_DRIVER;
3080
3081                 if (status & PQI_SOFT_RESET_ABORT)
3082                         return RESET_ABORT;
3083
3084                 if (time_after(jiffies, timeout)) {
3085                         dev_err(&ctrl_info->pci_dev->dev,
3086                                 "timed out waiting for soft reset status\n");
3087                         return RESET_TIMEDOUT;
3088                 }
3089
3090                 if (!sis_is_firmware_running(ctrl_info))
3091                         return RESET_NORESPONSE;
3092
3093                 ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS);
3094         }
3095 }
3096
3097 static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info,
3098                 enum pqi_soft_reset_status reset_status)
3099 {
3100         int rc;
3101
3102         switch (reset_status) {
3103         case RESET_INITIATE_DRIVER:
3104                 /* fall through */
3105         case RESET_TIMEDOUT:
3106                 dev_info(&ctrl_info->pci_dev->dev,
3107                         "resetting controller %u\n", ctrl_info->ctrl_id);
3108                 sis_soft_reset(ctrl_info);
3109                 /* fall through */
3110         case RESET_INITIATE_FIRMWARE:
3111                 rc = pqi_ofa_ctrl_restart(ctrl_info);
3112                 pqi_ofa_free_host_buffer(ctrl_info);
3113                 dev_info(&ctrl_info->pci_dev->dev,
3114                         "Online Firmware Activation for controller %u: %s\n",
3115                         ctrl_info->ctrl_id, rc == 0 ? "SUCCESS" : "FAILED");
3116                 break;
3117         case RESET_ABORT:
3118                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3119                 dev_info(&ctrl_info->pci_dev->dev,
3120                         "Online Firmware Activation for controller %u: %s\n",
3121                         ctrl_info->ctrl_id, "ABORTED");
3122                 break;
3123         case RESET_NORESPONSE:
3124                 pqi_ofa_free_host_buffer(ctrl_info);
3125                 pqi_take_ctrl_offline(ctrl_info);
3126                 break;
3127         }
3128 }
3129
3130 static void pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info,
3131         struct pqi_event *event)
3132 {
3133         u16 event_id;
3134         enum pqi_soft_reset_status status;
3135
3136         event_id = get_unaligned_le16(&event->event_id);
3137
3138         mutex_lock(&ctrl_info->ofa_mutex);
3139
3140         if (event_id == PQI_EVENT_OFA_QUIESCE) {
3141                 dev_info(&ctrl_info->pci_dev->dev,
3142                          "Received Online Firmware Activation quiesce event for controller %u\n",
3143                          ctrl_info->ctrl_id);
3144                 pqi_ofa_ctrl_quiesce(ctrl_info);
3145                 pqi_acknowledge_event(ctrl_info, event);
3146                 if (ctrl_info->soft_reset_handshake_supported) {
3147                         status = pqi_poll_for_soft_reset_status(ctrl_info);
3148                         pqi_process_soft_reset(ctrl_info, status);
3149                 } else {
3150                         pqi_process_soft_reset(ctrl_info,
3151                                         RESET_INITIATE_FIRMWARE);
3152                 }
3153
3154         } else if (event_id == PQI_EVENT_OFA_MEMORY_ALLOCATION) {
3155                 pqi_acknowledge_event(ctrl_info, event);
3156                 pqi_ofa_setup_host_buffer(ctrl_info,
3157                         le32_to_cpu(event->ofa_bytes_requested));
3158                 pqi_ofa_host_memory_update(ctrl_info);
3159         } else if (event_id == PQI_EVENT_OFA_CANCELLED) {
3160                 pqi_ofa_free_host_buffer(ctrl_info);
3161                 pqi_acknowledge_event(ctrl_info, event);
3162                 dev_info(&ctrl_info->pci_dev->dev,
3163                          "Online Firmware Activation(%u) cancel reason : %u\n",
3164                          ctrl_info->ctrl_id, event->ofa_cancel_reason);
3165         }
3166
3167         mutex_unlock(&ctrl_info->ofa_mutex);
3168 }
3169
3170 static void pqi_event_worker(struct work_struct *work)
3171 {
3172         unsigned int i;
3173         struct pqi_ctrl_info *ctrl_info;
3174         struct pqi_event *event;
3175
3176         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
3177
3178         pqi_ctrl_busy(ctrl_info);
3179         pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
3180         if (pqi_ctrl_offline(ctrl_info))
3181                 goto out;
3182
3183         pqi_schedule_rescan_worker_delayed(ctrl_info);
3184
3185         event = ctrl_info->events;
3186         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
3187                 if (event->pending) {
3188                         event->pending = false;
3189                         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3190                                 pqi_ctrl_unbusy(ctrl_info);
3191                                 pqi_ofa_process_event(ctrl_info, event);
3192                                 return;
3193                         }
3194                         pqi_acknowledge_event(ctrl_info, event);
3195                 }
3196                 event++;
3197         }
3198
3199 out:
3200         pqi_ctrl_unbusy(ctrl_info);
3201 }
3202
3203 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * PQI_HZ)
3204
3205 static void pqi_heartbeat_timer_handler(struct timer_list *t)
3206 {
3207         int num_interrupts;
3208         u32 heartbeat_count;
3209         struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t,
3210                                                      heartbeat_timer);
3211
3212         pqi_check_ctrl_health(ctrl_info);
3213         if (pqi_ctrl_offline(ctrl_info))
3214                 return;
3215
3216         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
3217         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
3218
3219         if (num_interrupts == ctrl_info->previous_num_interrupts) {
3220                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
3221                         dev_err(&ctrl_info->pci_dev->dev,
3222                                 "no heartbeat detected - last heartbeat count: %u\n",
3223                                 heartbeat_count);
3224                         pqi_take_ctrl_offline(ctrl_info);
3225                         return;
3226                 }
3227         } else {
3228                 ctrl_info->previous_num_interrupts = num_interrupts;
3229         }
3230
3231         ctrl_info->previous_heartbeat_count = heartbeat_count;
3232         mod_timer(&ctrl_info->heartbeat_timer,
3233                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
3234 }
3235
3236 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3237 {
3238         if (!ctrl_info->heartbeat_counter)
3239                 return;
3240
3241         ctrl_info->previous_num_interrupts =
3242                 atomic_read(&ctrl_info->num_interrupts);
3243         ctrl_info->previous_heartbeat_count =
3244                 pqi_read_heartbeat_counter(ctrl_info);
3245
3246         ctrl_info->heartbeat_timer.expires =
3247                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
3248         add_timer(&ctrl_info->heartbeat_timer);
3249 }
3250
3251 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3252 {
3253         del_timer_sync(&ctrl_info->heartbeat_timer);
3254 }
3255
3256 static inline int pqi_event_type_to_event_index(unsigned int event_type)
3257 {
3258         int index;
3259
3260         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
3261                 if (event_type == pqi_supported_event_types[index])
3262                         return index;
3263
3264         return -1;
3265 }
3266
3267 static inline bool pqi_is_supported_event(unsigned int event_type)
3268 {
3269         return pqi_event_type_to_event_index(event_type) != -1;
3270 }
3271
3272 static void pqi_ofa_capture_event_payload(struct pqi_event *event,
3273         struct pqi_event_response *response)
3274 {
3275         u16 event_id;
3276
3277         event_id = get_unaligned_le16(&event->event_id);
3278
3279         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3280                 if (event_id == PQI_EVENT_OFA_MEMORY_ALLOCATION) {
3281                         event->ofa_bytes_requested =
3282                         response->data.ofa_memory_allocation.bytes_requested;
3283                 } else if (event_id == PQI_EVENT_OFA_CANCELLED) {
3284                         event->ofa_cancel_reason =
3285                         response->data.ofa_cancelled.reason;
3286                 }
3287         }
3288 }
3289
3290 static unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
3291 {
3292         unsigned int num_events;
3293         pqi_index_t oq_pi;
3294         pqi_index_t oq_ci;
3295         struct pqi_event_queue *event_queue;
3296         struct pqi_event_response *response;
3297         struct pqi_event *event;
3298         int event_index;
3299
3300         event_queue = &ctrl_info->event_queue;
3301         num_events = 0;
3302         oq_ci = event_queue->oq_ci_copy;
3303
3304         while (1) {
3305                 oq_pi = readl(event_queue->oq_pi);
3306                 if (oq_pi == oq_ci)
3307                         break;
3308
3309                 num_events++;
3310                 response = event_queue->oq_element_array +
3311                         (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
3312
3313                 event_index =
3314                         pqi_event_type_to_event_index(response->event_type);
3315
3316                 if (event_index >= 0) {
3317                         if (response->request_acknowlege) {
3318                                 event = &ctrl_info->events[event_index];
3319                                 event->pending = true;
3320                                 event->event_type = response->event_type;
3321                                 event->event_id = response->event_id;
3322                                 event->additional_event_id =
3323                                         response->additional_event_id;
3324                                 pqi_ofa_capture_event_payload(event, response);
3325                         }
3326                 }
3327
3328                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
3329         }
3330
3331         if (num_events) {
3332                 event_queue->oq_ci_copy = oq_ci;
3333                 writel(oq_ci, event_queue->oq_ci);
3334                 schedule_work(&ctrl_info->event_work);
3335         }
3336
3337         return num_events;
3338 }
3339
3340 #define PQI_LEGACY_INTX_MASK    0x1
3341
3342 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info,
3343                                                 bool enable_intx)
3344 {
3345         u32 intx_mask;
3346         struct pqi_device_registers __iomem *pqi_registers;
3347         volatile void __iomem *register_addr;
3348
3349         pqi_registers = ctrl_info->pqi_registers;
3350
3351         if (enable_intx)
3352                 register_addr = &pqi_registers->legacy_intx_mask_clear;
3353         else
3354                 register_addr = &pqi_registers->legacy_intx_mask_set;
3355
3356         intx_mask = readl(register_addr);
3357         intx_mask |= PQI_LEGACY_INTX_MASK;
3358         writel(intx_mask, register_addr);
3359 }
3360
3361 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3362         enum pqi_irq_mode new_mode)
3363 {
3364         switch (ctrl_info->irq_mode) {
3365         case IRQ_MODE_MSIX:
3366                 switch (new_mode) {
3367                 case IRQ_MODE_MSIX:
3368                         break;
3369                 case IRQ_MODE_INTX:
3370                         pqi_configure_legacy_intx(ctrl_info, true);
3371                         sis_enable_intx(ctrl_info);
3372                         break;
3373                 case IRQ_MODE_NONE:
3374                         break;
3375                 }
3376                 break;
3377         case IRQ_MODE_INTX:
3378                 switch (new_mode) {
3379                 case IRQ_MODE_MSIX:
3380                         pqi_configure_legacy_intx(ctrl_info, false);
3381                         sis_enable_msix(ctrl_info);
3382                         break;
3383                 case IRQ_MODE_INTX:
3384                         break;
3385                 case IRQ_MODE_NONE:
3386                         pqi_configure_legacy_intx(ctrl_info, false);
3387                         break;
3388                 }
3389                 break;
3390         case IRQ_MODE_NONE:
3391                 switch (new_mode) {
3392                 case IRQ_MODE_MSIX:
3393                         sis_enable_msix(ctrl_info);
3394                         break;
3395                 case IRQ_MODE_INTX:
3396                         pqi_configure_legacy_intx(ctrl_info, true);
3397                         sis_enable_intx(ctrl_info);
3398                         break;
3399                 case IRQ_MODE_NONE:
3400                         break;
3401                 }
3402                 break;
3403         }
3404
3405         ctrl_info->irq_mode = new_mode;
3406 }
3407
3408 #define PQI_LEGACY_INTX_PENDING         0x1
3409
3410 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3411 {
3412         bool valid_irq;
3413         u32 intx_status;
3414
3415         switch (ctrl_info->irq_mode) {
3416         case IRQ_MODE_MSIX:
3417                 valid_irq = true;
3418                 break;
3419         case IRQ_MODE_INTX:
3420                 intx_status =
3421                         readl(&ctrl_info->pqi_registers->legacy_intx_status);
3422                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3423                         valid_irq = true;
3424                 else
3425                         valid_irq = false;
3426                 break;
3427         case IRQ_MODE_NONE:
3428         default:
3429                 valid_irq = false;
3430                 break;
3431         }
3432
3433         return valid_irq;
3434 }
3435
3436 static irqreturn_t pqi_irq_handler(int irq, void *data)
3437 {
3438         struct pqi_ctrl_info *ctrl_info;
3439         struct pqi_queue_group *queue_group;
3440         unsigned int num_responses_handled;
3441
3442         queue_group = data;
3443         ctrl_info = queue_group->ctrl_info;
3444
3445         if (!pqi_is_valid_irq(ctrl_info))
3446                 return IRQ_NONE;
3447
3448         num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3449
3450         if (irq == ctrl_info->event_irq)
3451                 num_responses_handled += pqi_process_event_intr(ctrl_info);
3452
3453         if (num_responses_handled)
3454                 atomic_inc(&ctrl_info->num_interrupts);
3455
3456         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3457         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3458
3459         return IRQ_HANDLED;
3460 }
3461
3462 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3463 {
3464         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3465         int i;
3466         int rc;
3467
3468         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3469
3470         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3471                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3472                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3473                 if (rc) {
3474                         dev_err(&pci_dev->dev,
3475                                 "irq %u init failed with error %d\n",
3476                                 pci_irq_vector(pci_dev, i), rc);
3477                         return rc;
3478                 }
3479                 ctrl_info->num_msix_vectors_initialized++;
3480         }
3481
3482         return 0;
3483 }
3484
3485 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3486 {
3487         int i;
3488
3489         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3490                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3491                         &ctrl_info->queue_groups[i]);
3492
3493         ctrl_info->num_msix_vectors_initialized = 0;
3494 }
3495
3496 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3497 {
3498         int num_vectors_enabled;
3499
3500         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3501                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3502                         PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3503         if (num_vectors_enabled < 0) {
3504                 dev_err(&ctrl_info->pci_dev->dev,
3505                         "MSI-X init failed with error %d\n",
3506                         num_vectors_enabled);
3507                 return num_vectors_enabled;
3508         }
3509
3510         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
3511         ctrl_info->irq_mode = IRQ_MODE_MSIX;
3512         return 0;
3513 }
3514
3515 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3516 {
3517         if (ctrl_info->num_msix_vectors_enabled) {
3518                 pci_free_irq_vectors(ctrl_info->pci_dev);
3519                 ctrl_info->num_msix_vectors_enabled = 0;
3520         }
3521 }
3522
3523 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
3524 {
3525         unsigned int i;
3526         size_t alloc_length;
3527         size_t element_array_length_per_iq;
3528         size_t element_array_length_per_oq;
3529         void *element_array;
3530         void __iomem *next_queue_index;
3531         void *aligned_pointer;
3532         unsigned int num_inbound_queues;
3533         unsigned int num_outbound_queues;
3534         unsigned int num_queue_indexes;
3535         struct pqi_queue_group *queue_group;
3536
3537         element_array_length_per_iq =
3538                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
3539                 ctrl_info->num_elements_per_iq;
3540         element_array_length_per_oq =
3541                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
3542                 ctrl_info->num_elements_per_oq;
3543         num_inbound_queues = ctrl_info->num_queue_groups * 2;
3544         num_outbound_queues = ctrl_info->num_queue_groups;
3545         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3546
3547         aligned_pointer = NULL;
3548
3549         for (i = 0; i < num_inbound_queues; i++) {
3550                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3551                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3552                 aligned_pointer += element_array_length_per_iq;
3553         }
3554
3555         for (i = 0; i < num_outbound_queues; i++) {
3556                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3557                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3558                 aligned_pointer += element_array_length_per_oq;
3559         }
3560
3561         aligned_pointer = PTR_ALIGN(aligned_pointer,
3562                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3563         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3564                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3565
3566         for (i = 0; i < num_queue_indexes; i++) {
3567                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3568                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3569                 aligned_pointer += sizeof(pqi_index_t);
3570         }
3571
3572         alloc_length = (size_t)aligned_pointer +
3573                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3574
3575         alloc_length += PQI_EXTRA_SGL_MEMORY;
3576
3577         ctrl_info->queue_memory_base =
3578                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
3579                                    &ctrl_info->queue_memory_base_dma_handle,
3580                                    GFP_KERNEL);
3581
3582         if (!ctrl_info->queue_memory_base)
3583                 return -ENOMEM;
3584
3585         ctrl_info->queue_memory_length = alloc_length;
3586
3587         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3588                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3589
3590         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3591                 queue_group = &ctrl_info->queue_groups[i];
3592                 queue_group->iq_element_array[RAID_PATH] = element_array;
3593                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
3594                         ctrl_info->queue_memory_base_dma_handle +
3595                                 (element_array - ctrl_info->queue_memory_base);
3596                 element_array += element_array_length_per_iq;
3597                 element_array = PTR_ALIGN(element_array,
3598                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3599                 queue_group->iq_element_array[AIO_PATH] = element_array;
3600                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
3601                         ctrl_info->queue_memory_base_dma_handle +
3602                         (element_array - ctrl_info->queue_memory_base);
3603                 element_array += element_array_length_per_iq;
3604                 element_array = PTR_ALIGN(element_array,
3605                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3606         }
3607
3608         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3609                 queue_group = &ctrl_info->queue_groups[i];
3610                 queue_group->oq_element_array = element_array;
3611                 queue_group->oq_element_array_bus_addr =
3612                         ctrl_info->queue_memory_base_dma_handle +
3613                         (element_array - ctrl_info->queue_memory_base);
3614                 element_array += element_array_length_per_oq;
3615                 element_array = PTR_ALIGN(element_array,
3616                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3617         }
3618
3619         ctrl_info->event_queue.oq_element_array = element_array;
3620         ctrl_info->event_queue.oq_element_array_bus_addr =
3621                 ctrl_info->queue_memory_base_dma_handle +
3622                 (element_array - ctrl_info->queue_memory_base);
3623         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3624                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3625
3626         next_queue_index = (void __iomem *)PTR_ALIGN(element_array,
3627                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
3628
3629         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3630                 queue_group = &ctrl_info->queue_groups[i];
3631                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
3632                 queue_group->iq_ci_bus_addr[RAID_PATH] =
3633                         ctrl_info->queue_memory_base_dma_handle +
3634                         (next_queue_index -
3635                         (void __iomem *)ctrl_info->queue_memory_base);
3636                 next_queue_index += sizeof(pqi_index_t);
3637                 next_queue_index = PTR_ALIGN(next_queue_index,
3638                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3639                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
3640                 queue_group->iq_ci_bus_addr[AIO_PATH] =
3641                         ctrl_info->queue_memory_base_dma_handle +
3642                         (next_queue_index -
3643                         (void __iomem *)ctrl_info->queue_memory_base);
3644                 next_queue_index += sizeof(pqi_index_t);
3645                 next_queue_index = PTR_ALIGN(next_queue_index,
3646                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3647                 queue_group->oq_pi = next_queue_index;
3648                 queue_group->oq_pi_bus_addr =
3649                         ctrl_info->queue_memory_base_dma_handle +
3650                         (next_queue_index -
3651                         (void __iomem *)ctrl_info->queue_memory_base);
3652                 next_queue_index += sizeof(pqi_index_t);
3653                 next_queue_index = PTR_ALIGN(next_queue_index,
3654                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3655         }
3656
3657         ctrl_info->event_queue.oq_pi = next_queue_index;
3658         ctrl_info->event_queue.oq_pi_bus_addr =
3659                 ctrl_info->queue_memory_base_dma_handle +
3660                 (next_queue_index -
3661                 (void __iomem *)ctrl_info->queue_memory_base);
3662
3663         return 0;
3664 }
3665
3666 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3667 {
3668         unsigned int i;
3669         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3670         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3671
3672         /*
3673          * Initialize the backpointers to the controller structure in
3674          * each operational queue group structure.
3675          */
3676         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3677                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
3678
3679         /*
3680          * Assign IDs to all operational queues.  Note that the IDs
3681          * assigned to operational IQs are independent of the IDs
3682          * assigned to operational OQs.
3683          */
3684         ctrl_info->event_queue.oq_id = next_oq_id++;
3685         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3686                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
3687                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
3688                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
3689         }
3690
3691         /*
3692          * Assign MSI-X table entry indexes to all queues.  Note that the
3693          * interrupt for the event queue is shared with the first queue group.
3694          */
3695         ctrl_info->event_queue.int_msg_num = 0;
3696         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3697                 ctrl_info->queue_groups[i].int_msg_num = i;
3698
3699         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3700                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
3701                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
3702                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
3703                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
3704         }
3705 }
3706
3707 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
3708 {
3709         size_t alloc_length;
3710         struct pqi_admin_queues_aligned *admin_queues_aligned;
3711         struct pqi_admin_queues *admin_queues;
3712
3713         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
3714                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3715
3716         ctrl_info->admin_queue_memory_base =
3717                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
3718                                    &ctrl_info->admin_queue_memory_base_dma_handle,
3719                                    GFP_KERNEL);
3720
3721         if (!ctrl_info->admin_queue_memory_base)
3722                 return -ENOMEM;
3723
3724         ctrl_info->admin_queue_memory_length = alloc_length;
3725
3726         admin_queues = &ctrl_info->admin_queues;
3727         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
3728                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3729         admin_queues->iq_element_array =
3730                 &admin_queues_aligned->iq_element_array;
3731         admin_queues->oq_element_array =
3732                 &admin_queues_aligned->oq_element_array;
3733         admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
3734         admin_queues->oq_pi =
3735                 (pqi_index_t __iomem *)&admin_queues_aligned->oq_pi;
3736
3737         admin_queues->iq_element_array_bus_addr =
3738                 ctrl_info->admin_queue_memory_base_dma_handle +
3739                 (admin_queues->iq_element_array -
3740                 ctrl_info->admin_queue_memory_base);
3741         admin_queues->oq_element_array_bus_addr =
3742                 ctrl_info->admin_queue_memory_base_dma_handle +
3743                 (admin_queues->oq_element_array -
3744                 ctrl_info->admin_queue_memory_base);
3745         admin_queues->iq_ci_bus_addr =
3746                 ctrl_info->admin_queue_memory_base_dma_handle +
3747                 ((void *)admin_queues->iq_ci -
3748                 ctrl_info->admin_queue_memory_base);
3749         admin_queues->oq_pi_bus_addr =
3750                 ctrl_info->admin_queue_memory_base_dma_handle +
3751                 ((void __iomem *)admin_queues->oq_pi -
3752                 (void __iomem *)ctrl_info->admin_queue_memory_base);
3753
3754         return 0;
3755 }
3756
3757 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          PQI_HZ
3758 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
3759
3760 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
3761 {
3762         struct pqi_device_registers __iomem *pqi_registers;
3763         struct pqi_admin_queues *admin_queues;
3764         unsigned long timeout;
3765         u8 status;
3766         u32 reg;
3767
3768         pqi_registers = ctrl_info->pqi_registers;
3769         admin_queues = &ctrl_info->admin_queues;
3770
3771         writeq((u64)admin_queues->iq_element_array_bus_addr,
3772                 &pqi_registers->admin_iq_element_array_addr);
3773         writeq((u64)admin_queues->oq_element_array_bus_addr,
3774                 &pqi_registers->admin_oq_element_array_addr);
3775         writeq((u64)admin_queues->iq_ci_bus_addr,
3776                 &pqi_registers->admin_iq_ci_addr);
3777         writeq((u64)admin_queues->oq_pi_bus_addr,
3778                 &pqi_registers->admin_oq_pi_addr);
3779
3780         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
3781                 (PQI_ADMIN_OQ_NUM_ELEMENTS) << 8 |
3782                 (admin_queues->int_msg_num << 16);
3783         writel(reg, &pqi_registers->admin_iq_num_elements);
3784         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
3785                 &pqi_registers->function_and_status_code);
3786
3787         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
3788         while (1) {
3789                 status = readb(&pqi_registers->function_and_status_code);
3790                 if (status == PQI_STATUS_IDLE)
3791                         break;
3792                 if (time_after(jiffies, timeout))
3793                         return -ETIMEDOUT;
3794                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
3795         }
3796
3797         /*
3798          * The offset registers are not initialized to the correct
3799          * offsets until *after* the create admin queue pair command
3800          * completes successfully.
3801          */
3802         admin_queues->iq_pi = ctrl_info->iomem_base +
3803                 PQI_DEVICE_REGISTERS_OFFSET +
3804                 readq(&pqi_registers->admin_iq_pi_offset);
3805         admin_queues->oq_ci = ctrl_info->iomem_base +
3806                 PQI_DEVICE_REGISTERS_OFFSET +
3807                 readq(&pqi_registers->admin_oq_ci_offset);
3808
3809         return 0;
3810 }
3811
3812 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
3813         struct pqi_general_admin_request *request)
3814 {
3815         struct pqi_admin_queues *admin_queues;
3816         void *next_element;
3817         pqi_index_t iq_pi;
3818
3819         admin_queues = &ctrl_info->admin_queues;
3820         iq_pi = admin_queues->iq_pi_copy;
3821
3822         next_element = admin_queues->iq_element_array +
3823                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
3824
3825         memcpy(next_element, request, sizeof(*request));
3826
3827         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
3828         admin_queues->iq_pi_copy = iq_pi;
3829
3830         /*
3831          * This write notifies the controller that an IU is available to be
3832          * processed.
3833          */
3834         writel(iq_pi, admin_queues->iq_pi);
3835 }
3836
3837 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
3838
3839 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
3840         struct pqi_general_admin_response *response)
3841 {
3842         struct pqi_admin_queues *admin_queues;
3843         pqi_index_t oq_pi;
3844         pqi_index_t oq_ci;
3845         unsigned long timeout;
3846
3847         admin_queues = &ctrl_info->admin_queues;
3848         oq_ci = admin_queues->oq_ci_copy;
3849
3850         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * PQI_HZ) + jiffies;
3851
3852         while (1) {
3853                 oq_pi = readl(admin_queues->oq_pi);
3854                 if (oq_pi != oq_ci)
3855                         break;
3856                 if (time_after(jiffies, timeout)) {
3857                         dev_err(&ctrl_info->pci_dev->dev,
3858                                 "timed out waiting for admin response\n");
3859                         return -ETIMEDOUT;
3860                 }
3861                 if (!sis_is_firmware_running(ctrl_info))
3862                         return -ENXIO;
3863                 usleep_range(1000, 2000);
3864         }
3865
3866         memcpy(response, admin_queues->oq_element_array +
3867                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
3868
3869         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
3870         admin_queues->oq_ci_copy = oq_ci;
3871         writel(oq_ci, admin_queues->oq_ci);
3872
3873         return 0;
3874 }
3875
3876 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
3877         struct pqi_queue_group *queue_group, enum pqi_io_path path,
3878         struct pqi_io_request *io_request)
3879 {
3880         struct pqi_io_request *next;
3881         void *next_element;
3882         pqi_index_t iq_pi;
3883         pqi_index_t iq_ci;
3884         size_t iu_length;
3885         unsigned long flags;
3886         unsigned int num_elements_needed;
3887         unsigned int num_elements_to_end_of_queue;
3888         size_t copy_count;
3889         struct pqi_iu_header *request;
3890
3891         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
3892
3893         if (io_request) {
3894                 io_request->queue_group = queue_group;
3895                 list_add_tail(&io_request->request_list_entry,
3896                         &queue_group->request_list[path]);
3897         }
3898
3899         iq_pi = queue_group->iq_pi_copy[path];
3900
3901         list_for_each_entry_safe(io_request, next,
3902                 &queue_group->request_list[path], request_list_entry) {
3903
3904                 request = io_request->iu;
3905
3906                 iu_length = get_unaligned_le16(&request->iu_length) +
3907                         PQI_REQUEST_HEADER_LENGTH;
3908                 num_elements_needed =
3909                         DIV_ROUND_UP(iu_length,
3910                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3911
3912                 iq_ci = readl(queue_group->iq_ci[path]);
3913
3914                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
3915                         ctrl_info->num_elements_per_iq))
3916                         break;
3917
3918                 put_unaligned_le16(queue_group->oq_id,
3919                         &request->response_queue_id);
3920
3921                 next_element = queue_group->iq_element_array[path] +
3922                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3923
3924                 num_elements_to_end_of_queue =
3925                         ctrl_info->num_elements_per_iq - iq_pi;
3926
3927                 if (num_elements_needed <= num_elements_to_end_of_queue) {
3928                         memcpy(next_element, request, iu_length);
3929                 } else {
3930                         copy_count = num_elements_to_end_of_queue *
3931                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
3932                         memcpy(next_element, request, copy_count);
3933                         memcpy(queue_group->iq_element_array[path],
3934                                 (u8 *)request + copy_count,
3935                                 iu_length - copy_count);
3936                 }
3937
3938                 iq_pi = (iq_pi + num_elements_needed) %
3939                         ctrl_info->num_elements_per_iq;
3940
3941                 list_del(&io_request->request_list_entry);
3942         }
3943
3944         if (iq_pi != queue_group->iq_pi_copy[path]) {
3945                 queue_group->iq_pi_copy[path] = iq_pi;
3946                 /*
3947                  * This write notifies the controller that one or more IUs are
3948                  * available to be processed.
3949                  */
3950                 writel(iq_pi, queue_group->iq_pi[path]);
3951         }
3952
3953         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
3954 }
3955
3956 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
3957
3958 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
3959         struct completion *wait)
3960 {
3961         int rc;
3962
3963         while (1) {
3964                 if (wait_for_completion_io_timeout(wait,
3965                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * PQI_HZ)) {
3966                         rc = 0;
3967                         break;
3968                 }
3969
3970                 pqi_check_ctrl_health(ctrl_info);
3971                 if (pqi_ctrl_offline(ctrl_info)) {
3972                         rc = -ENXIO;
3973                         break;
3974                 }
3975         }
3976
3977         return rc;
3978 }
3979
3980 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
3981         void *context)
3982 {
3983         struct completion *waiting = context;
3984
3985         complete(waiting);
3986 }
3987
3988 static int pqi_process_raid_io_error_synchronous(struct pqi_raid_error_info
3989                                                 *error_info)
3990 {
3991         int rc = -EIO;
3992
3993         switch (error_info->data_out_result) {
3994         case PQI_DATA_IN_OUT_GOOD:
3995                 if (error_info->status == SAM_STAT_GOOD)
3996                         rc = 0;
3997                 break;
3998         case PQI_DATA_IN_OUT_UNDERFLOW:
3999                 if (error_info->status == SAM_STAT_GOOD ||
4000                         error_info->status == SAM_STAT_CHECK_CONDITION)
4001                         rc = 0;
4002                 break;
4003         case PQI_DATA_IN_OUT_ABORTED:
4004                 rc = PQI_CMD_STATUS_ABORTED;
4005                 break;
4006         }
4007
4008         return rc;
4009 }
4010
4011 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
4012         struct pqi_iu_header *request, unsigned int flags,
4013         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
4014 {
4015         int rc = 0;
4016         struct pqi_io_request *io_request;
4017         unsigned long start_jiffies;
4018         unsigned long msecs_blocked;
4019         size_t iu_length;
4020         DECLARE_COMPLETION_ONSTACK(wait);
4021
4022         /*
4023          * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
4024          * are mutually exclusive.
4025          */
4026
4027         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
4028                 if (down_interruptible(&ctrl_info->sync_request_sem))
4029                         return -ERESTARTSYS;
4030         } else {
4031                 if (timeout_msecs == NO_TIMEOUT) {
4032                         down(&ctrl_info->sync_request_sem);
4033                 } else {
4034                         start_jiffies = jiffies;
4035                         if (down_timeout(&ctrl_info->sync_request_sem,
4036                                 msecs_to_jiffies(timeout_msecs)))
4037                                 return -ETIMEDOUT;
4038                         msecs_blocked =
4039                                 jiffies_to_msecs(jiffies - start_jiffies);
4040                         if (msecs_blocked >= timeout_msecs)
4041                                 return -ETIMEDOUT;
4042                         timeout_msecs -= msecs_blocked;
4043                 }
4044         }
4045
4046         pqi_ctrl_busy(ctrl_info);
4047         timeout_msecs = pqi_wait_if_ctrl_blocked(ctrl_info, timeout_msecs);
4048         if (timeout_msecs == 0) {
4049                 pqi_ctrl_unbusy(ctrl_info);
4050                 rc = -ETIMEDOUT;
4051                 goto out;
4052         }
4053
4054         if (pqi_ctrl_offline(ctrl_info)) {
4055                 pqi_ctrl_unbusy(ctrl_info);
4056                 rc = -ENXIO;
4057                 goto out;
4058         }
4059
4060         io_request = pqi_alloc_io_request(ctrl_info);
4061
4062         put_unaligned_le16(io_request->index,
4063                 &(((struct pqi_raid_path_request *)request)->request_id));
4064
4065         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
4066                 ((struct pqi_raid_path_request *)request)->error_index =
4067                         ((struct pqi_raid_path_request *)request)->request_id;
4068
4069         iu_length = get_unaligned_le16(&request->iu_length) +
4070                 PQI_REQUEST_HEADER_LENGTH;
4071         memcpy(io_request->iu, request, iu_length);
4072
4073         io_request->io_complete_callback = pqi_raid_synchronous_complete;
4074         io_request->context = &wait;
4075
4076         pqi_start_io(ctrl_info,
4077                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
4078                 io_request);
4079
4080         pqi_ctrl_unbusy(ctrl_info);
4081
4082         if (timeout_msecs == NO_TIMEOUT) {
4083                 pqi_wait_for_completion_io(ctrl_info, &wait);
4084         } else {
4085                 if (!wait_for_completion_io_timeout(&wait,
4086                         msecs_to_jiffies(timeout_msecs))) {
4087                         dev_warn(&ctrl_info->pci_dev->dev,
4088                                 "command timed out\n");
4089                         rc = -ETIMEDOUT;
4090                 }
4091         }
4092
4093         if (error_info) {
4094                 if (io_request->error_info)
4095                         memcpy(error_info, io_request->error_info,
4096                                 sizeof(*error_info));
4097                 else
4098                         memset(error_info, 0, sizeof(*error_info));
4099         } else if (rc == 0 && io_request->error_info) {
4100                 rc = pqi_process_raid_io_error_synchronous(
4101                         io_request->error_info);
4102         }
4103
4104         pqi_free_io_request(io_request);
4105
4106 out:
4107         up(&ctrl_info->sync_request_sem);
4108
4109         return rc;
4110 }
4111
4112 static int pqi_validate_admin_response(
4113         struct pqi_general_admin_response *response, u8 expected_function_code)
4114 {
4115         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
4116                 return -EINVAL;
4117
4118         if (get_unaligned_le16(&response->header.iu_length) !=
4119                 PQI_GENERAL_ADMIN_IU_LENGTH)
4120                 return -EINVAL;
4121
4122         if (response->function_code != expected_function_code)
4123                 return -EINVAL;
4124
4125         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
4126                 return -EINVAL;
4127
4128         return 0;
4129 }
4130
4131 static int pqi_submit_admin_request_synchronous(
4132         struct pqi_ctrl_info *ctrl_info,
4133         struct pqi_general_admin_request *request,
4134         struct pqi_general_admin_response *response)
4135 {
4136         int rc;
4137
4138         pqi_submit_admin_request(ctrl_info, request);
4139
4140         rc = pqi_poll_for_admin_response(ctrl_info, response);
4141
4142         if (rc == 0)
4143                 rc = pqi_validate_admin_response(response,
4144                         request->function_code);
4145
4146         return rc;
4147 }
4148
4149 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
4150 {
4151         int rc;
4152         struct pqi_general_admin_request request;
4153         struct pqi_general_admin_response response;
4154         struct pqi_device_capability *capability;
4155         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
4156
4157         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
4158         if (!capability)
4159                 return -ENOMEM;
4160
4161         memset(&request, 0, sizeof(request));
4162
4163         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4164         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4165                 &request.header.iu_length);
4166         request.function_code =
4167                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
4168         put_unaligned_le32(sizeof(*capability),
4169                 &request.data.report_device_capability.buffer_length);
4170
4171         rc = pqi_map_single(ctrl_info->pci_dev,
4172                 &request.data.report_device_capability.sg_descriptor,
4173                 capability, sizeof(*capability),
4174                 DMA_FROM_DEVICE);
4175         if (rc)
4176                 goto out;
4177
4178         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4179                 &response);
4180
4181         pqi_pci_unmap(ctrl_info->pci_dev,
4182                 &request.data.report_device_capability.sg_descriptor, 1,
4183                 DMA_FROM_DEVICE);
4184
4185         if (rc)
4186                 goto out;
4187
4188         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
4189                 rc = -EIO;
4190                 goto out;
4191         }
4192
4193         ctrl_info->max_inbound_queues =
4194                 get_unaligned_le16(&capability->max_inbound_queues);
4195         ctrl_info->max_elements_per_iq =
4196                 get_unaligned_le16(&capability->max_elements_per_iq);
4197         ctrl_info->max_iq_element_length =
4198                 get_unaligned_le16(&capability->max_iq_element_length)
4199                 * 16;
4200         ctrl_info->max_outbound_queues =
4201                 get_unaligned_le16(&capability->max_outbound_queues);
4202         ctrl_info->max_elements_per_oq =
4203                 get_unaligned_le16(&capability->max_elements_per_oq);
4204         ctrl_info->max_oq_element_length =
4205                 get_unaligned_le16(&capability->max_oq_element_length)
4206                 * 16;
4207
4208         sop_iu_layer_descriptor =
4209                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
4210
4211         ctrl_info->max_inbound_iu_length_per_firmware =
4212                 get_unaligned_le16(
4213                         &sop_iu_layer_descriptor->max_inbound_iu_length);
4214         ctrl_info->inbound_spanning_supported =
4215                 sop_iu_layer_descriptor->inbound_spanning_supported;
4216         ctrl_info->outbound_spanning_supported =
4217                 sop_iu_layer_descriptor->outbound_spanning_supported;
4218
4219 out:
4220         kfree(capability);
4221
4222         return rc;
4223 }
4224
4225 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
4226 {
4227         if (ctrl_info->max_iq_element_length <
4228                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4229                 dev_err(&ctrl_info->pci_dev->dev,
4230                         "max. inbound queue element length of %d is less than the required length of %d\n",
4231                         ctrl_info->max_iq_element_length,
4232                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4233                 return -EINVAL;
4234         }
4235
4236         if (ctrl_info->max_oq_element_length <
4237                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
4238                 dev_err(&ctrl_info->pci_dev->dev,
4239                         "max. outbound queue element length of %d is less than the required length of %d\n",
4240                         ctrl_info->max_oq_element_length,
4241                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
4242                 return -EINVAL;
4243         }
4244
4245         if (ctrl_info->max_inbound_iu_length_per_firmware <
4246                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4247                 dev_err(&ctrl_info->pci_dev->dev,
4248                         "max. inbound IU length of %u is less than the min. required length of %d\n",
4249                         ctrl_info->max_inbound_iu_length_per_firmware,
4250                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4251                 return -EINVAL;
4252         }
4253
4254         if (!ctrl_info->inbound_spanning_supported) {
4255                 dev_err(&ctrl_info->pci_dev->dev,
4256                         "the controller does not support inbound spanning\n");
4257                 return -EINVAL;
4258         }
4259
4260         if (ctrl_info->outbound_spanning_supported) {
4261                 dev_err(&ctrl_info->pci_dev->dev,
4262                         "the controller supports outbound spanning but this driver does not\n");
4263                 return -EINVAL;
4264         }
4265
4266         return 0;
4267 }
4268
4269 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
4270 {
4271         int rc;
4272         struct pqi_event_queue *event_queue;
4273         struct pqi_general_admin_request request;
4274         struct pqi_general_admin_response response;
4275
4276         event_queue = &ctrl_info->event_queue;
4277
4278         /*
4279          * Create OQ (Outbound Queue - device to host queue) to dedicate
4280          * to events.
4281          */
4282         memset(&request, 0, sizeof(request));
4283         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4284         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4285                 &request.header.iu_length);
4286         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4287         put_unaligned_le16(event_queue->oq_id,
4288                 &request.data.create_operational_oq.queue_id);
4289         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
4290                 &request.data.create_operational_oq.element_array_addr);
4291         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
4292                 &request.data.create_operational_oq.pi_addr);
4293         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
4294                 &request.data.create_operational_oq.num_elements);
4295         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
4296                 &request.data.create_operational_oq.element_length);
4297         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4298         put_unaligned_le16(event_queue->int_msg_num,
4299                 &request.data.create_operational_oq.int_msg_num);
4300
4301         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4302                 &response);
4303         if (rc)
4304                 return rc;
4305
4306         event_queue->oq_ci = ctrl_info->iomem_base +
4307                 PQI_DEVICE_REGISTERS_OFFSET +
4308                 get_unaligned_le64(
4309                         &response.data.create_operational_oq.oq_ci_offset);
4310
4311         return 0;
4312 }
4313
4314 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
4315         unsigned int group_number)
4316 {
4317         int rc;
4318         struct pqi_queue_group *queue_group;
4319         struct pqi_general_admin_request request;
4320         struct pqi_general_admin_response response;
4321
4322         queue_group = &ctrl_info->queue_groups[group_number];
4323
4324         /*
4325          * Create IQ (Inbound Queue - host to device queue) for
4326          * RAID path.
4327          */
4328         memset(&request, 0, sizeof(request));
4329         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4330         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4331                 &request.header.iu_length);
4332         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4333         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
4334                 &request.data.create_operational_iq.queue_id);
4335         put_unaligned_le64(
4336                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
4337                 &request.data.create_operational_iq.element_array_addr);
4338         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
4339                 &request.data.create_operational_iq.ci_addr);
4340         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4341                 &request.data.create_operational_iq.num_elements);
4342         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4343                 &request.data.create_operational_iq.element_length);
4344         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4345
4346         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4347                 &response);
4348         if (rc) {
4349                 dev_err(&ctrl_info->pci_dev->dev,
4350                         "error creating inbound RAID queue\n");
4351                 return rc;
4352         }
4353
4354         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4355                 PQI_DEVICE_REGISTERS_OFFSET +
4356                 get_unaligned_le64(
4357                         &response.data.create_operational_iq.iq_pi_offset);
4358
4359         /*
4360          * Create IQ (Inbound Queue - host to device queue) for
4361          * Advanced I/O (AIO) path.
4362          */
4363         memset(&request, 0, sizeof(request));
4364         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4365         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4366                 &request.header.iu_length);
4367         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4368         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4369                 &request.data.create_operational_iq.queue_id);
4370         put_unaligned_le64((u64)queue_group->
4371                 iq_element_array_bus_addr[AIO_PATH],
4372                 &request.data.create_operational_iq.element_array_addr);
4373         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4374                 &request.data.create_operational_iq.ci_addr);
4375         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4376                 &request.data.create_operational_iq.num_elements);
4377         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4378                 &request.data.create_operational_iq.element_length);
4379         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4380
4381         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4382                 &response);
4383         if (rc) {
4384                 dev_err(&ctrl_info->pci_dev->dev,
4385                         "error creating inbound AIO queue\n");
4386                 return rc;
4387         }
4388
4389         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4390                 PQI_DEVICE_REGISTERS_OFFSET +
4391                 get_unaligned_le64(
4392                         &response.data.create_operational_iq.iq_pi_offset);
4393
4394         /*
4395          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4396          * assumed to be for RAID path I/O unless we change the queue's
4397          * property.
4398          */
4399         memset(&request, 0, sizeof(request));
4400         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4401         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4402                 &request.header.iu_length);
4403         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4404         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4405                 &request.data.change_operational_iq_properties.queue_id);
4406         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4407                 &request.data.change_operational_iq_properties.vendor_specific);
4408
4409         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4410                 &response);
4411         if (rc) {
4412                 dev_err(&ctrl_info->pci_dev->dev,
4413                         "error changing queue property\n");
4414                 return rc;
4415         }
4416
4417         /*
4418          * Create OQ (Outbound Queue - device to host queue).
4419          */
4420         memset(&request, 0, sizeof(request));
4421         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4422         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4423                 &request.header.iu_length);
4424         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4425         put_unaligned_le16(queue_group->oq_id,
4426                 &request.data.create_operational_oq.queue_id);
4427         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4428                 &request.data.create_operational_oq.element_array_addr);
4429         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4430                 &request.data.create_operational_oq.pi_addr);
4431         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4432                 &request.data.create_operational_oq.num_elements);
4433         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4434                 &request.data.create_operational_oq.element_length);
4435         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4436         put_unaligned_le16(queue_group->int_msg_num,
4437                 &request.data.create_operational_oq.int_msg_num);
4438
4439         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4440                 &response);
4441         if (rc) {
4442                 dev_err(&ctrl_info->pci_dev->dev,
4443                         "error creating outbound queue\n");
4444                 return rc;
4445         }
4446
4447         queue_group->oq_ci = ctrl_info->iomem_base +
4448                 PQI_DEVICE_REGISTERS_OFFSET +
4449                 get_unaligned_le64(
4450                         &response.data.create_operational_oq.oq_ci_offset);
4451
4452         return 0;
4453 }
4454
4455 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4456 {
4457         int rc;
4458         unsigned int i;
4459
4460         rc = pqi_create_event_queue(ctrl_info);
4461         if (rc) {
4462                 dev_err(&ctrl_info->pci_dev->dev,
4463                         "error creating event queue\n");
4464                 return rc;
4465         }
4466
4467         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4468                 rc = pqi_create_queue_group(ctrl_info, i);
4469                 if (rc) {
4470                         dev_err(&ctrl_info->pci_dev->dev,
4471                                 "error creating queue group number %u/%u\n",
4472                                 i, ctrl_info->num_queue_groups);
4473                         return rc;
4474                 }
4475         }
4476
4477         return 0;
4478 }
4479
4480 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4481         (offsetof(struct pqi_event_config, descriptors) + \
4482         (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
4483
4484 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4485         bool enable_events)
4486 {
4487         int rc;
4488         unsigned int i;
4489         struct pqi_event_config *event_config;
4490         struct pqi_event_descriptor *event_descriptor;
4491         struct pqi_general_management_request request;
4492
4493         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4494                 GFP_KERNEL);
4495         if (!event_config)
4496                 return -ENOMEM;
4497
4498         memset(&request, 0, sizeof(request));
4499
4500         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4501         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4502                 data.report_event_configuration.sg_descriptors[1]) -
4503                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4504         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4505                 &request.data.report_event_configuration.buffer_length);
4506
4507         rc = pqi_map_single(ctrl_info->pci_dev,
4508                 request.data.report_event_configuration.sg_descriptors,
4509                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4510                 DMA_FROM_DEVICE);
4511         if (rc)
4512                 goto out;
4513
4514         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
4515                 0, NULL, NO_TIMEOUT);
4516
4517         pqi_pci_unmap(ctrl_info->pci_dev,
4518                 request.data.report_event_configuration.sg_descriptors, 1,
4519                 DMA_FROM_DEVICE);
4520
4521         if (rc)
4522                 goto out;
4523
4524         for (i = 0; i < event_config->num_event_descriptors; i++) {
4525                 event_descriptor = &event_config->descriptors[i];
4526                 if (enable_events &&
4527                         pqi_is_supported_event(event_descriptor->event_type))
4528                         put_unaligned_le16(ctrl_info->event_queue.oq_id,
4529                                         &event_descriptor->oq_id);
4530                 else
4531                         put_unaligned_le16(0, &event_descriptor->oq_id);
4532         }
4533
4534         memset(&request, 0, sizeof(request));
4535
4536         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4537         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4538                 data.report_event_configuration.sg_descriptors[1]) -
4539                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4540         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4541                 &request.data.report_event_configuration.buffer_length);
4542
4543         rc = pqi_map_single(ctrl_info->pci_dev,
4544                 request.data.report_event_configuration.sg_descriptors,
4545                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4546                 DMA_TO_DEVICE);
4547         if (rc)
4548                 goto out;
4549
4550         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
4551                 NULL, NO_TIMEOUT);
4552
4553         pqi_pci_unmap(ctrl_info->pci_dev,
4554                 request.data.report_event_configuration.sg_descriptors, 1,
4555                 DMA_TO_DEVICE);
4556
4557 out:
4558         kfree(event_config);
4559
4560         return rc;
4561 }
4562
4563 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
4564 {
4565         return pqi_configure_events(ctrl_info, true);
4566 }
4567
4568 static inline int pqi_disable_events(struct pqi_ctrl_info *ctrl_info)
4569 {
4570         return pqi_configure_events(ctrl_info, false);
4571 }
4572
4573 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
4574 {
4575         unsigned int i;
4576         struct device *dev;
4577         size_t sg_chain_buffer_length;
4578         struct pqi_io_request *io_request;
4579
4580         if (!ctrl_info->io_request_pool)
4581                 return;
4582
4583         dev = &ctrl_info->pci_dev->dev;
4584         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4585         io_request = ctrl_info->io_request_pool;
4586
4587         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4588                 kfree(io_request->iu);
4589                 if (!io_request->sg_chain_buffer)
4590                         break;
4591                 dma_free_coherent(dev, sg_chain_buffer_length,
4592                         io_request->sg_chain_buffer,
4593                         io_request->sg_chain_buffer_dma_handle);
4594                 io_request++;
4595         }
4596
4597         kfree(ctrl_info->io_request_pool);
4598         ctrl_info->io_request_pool = NULL;
4599 }
4600
4601 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4602 {
4603         ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev,
4604                                                      ctrl_info->error_buffer_length,
4605                                                      &ctrl_info->error_buffer_dma_handle,
4606                                                      GFP_KERNEL);
4607
4608         if (!ctrl_info->error_buffer)
4609                 return -ENOMEM;
4610
4611         return 0;
4612 }
4613
4614 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4615 {
4616         unsigned int i;
4617         void *sg_chain_buffer;
4618         size_t sg_chain_buffer_length;
4619         dma_addr_t sg_chain_buffer_dma_handle;
4620         struct device *dev;
4621         struct pqi_io_request *io_request;
4622
4623         ctrl_info->io_request_pool =
4624                 kcalloc(ctrl_info->max_io_slots,
4625                         sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4626
4627         if (!ctrl_info->io_request_pool) {
4628                 dev_err(&ctrl_info->pci_dev->dev,
4629                         "failed to allocate I/O request pool\n");
4630                 goto error;
4631         }
4632
4633         dev = &ctrl_info->pci_dev->dev;
4634         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4635         io_request = ctrl_info->io_request_pool;
4636
4637         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4638                 io_request->iu =
4639                         kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4640
4641                 if (!io_request->iu) {
4642                         dev_err(&ctrl_info->pci_dev->dev,
4643                                 "failed to allocate IU buffers\n");
4644                         goto error;
4645                 }
4646
4647                 sg_chain_buffer = dma_alloc_coherent(dev,
4648                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4649                         GFP_KERNEL);
4650
4651                 if (!sg_chain_buffer) {
4652                         dev_err(&ctrl_info->pci_dev->dev,
4653                                 "failed to allocate PQI scatter-gather chain buffers\n");
4654                         goto error;
4655                 }
4656
4657                 io_request->index = i;
4658                 io_request->sg_chain_buffer = sg_chain_buffer;
4659                 io_request->sg_chain_buffer_dma_handle =
4660                         sg_chain_buffer_dma_handle;
4661                 io_request++;
4662         }
4663
4664         return 0;
4665
4666 error:
4667         pqi_free_all_io_requests(ctrl_info);
4668
4669         return -ENOMEM;
4670 }
4671
4672 /*
4673  * Calculate required resources that are sized based on max. outstanding
4674  * requests and max. transfer size.
4675  */
4676
4677 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4678 {
4679         u32 max_transfer_size;
4680         u32 max_sg_entries;
4681
4682         ctrl_info->scsi_ml_can_queue =
4683                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4684         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4685
4686         ctrl_info->error_buffer_length =
4687                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4688
4689         if (reset_devices)
4690                 max_transfer_size = min(ctrl_info->max_transfer_size,
4691                         PQI_MAX_TRANSFER_SIZE_KDUMP);
4692         else
4693                 max_transfer_size = min(ctrl_info->max_transfer_size,
4694                         PQI_MAX_TRANSFER_SIZE);
4695
4696         max_sg_entries = max_transfer_size / PAGE_SIZE;
4697
4698         /* +1 to cover when the buffer is not page-aligned. */
4699         max_sg_entries++;
4700
4701         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4702
4703         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4704
4705         ctrl_info->sg_chain_buffer_length =
4706                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4707                 PQI_EXTRA_SGL_MEMORY;
4708         ctrl_info->sg_tablesize = max_sg_entries;
4709         ctrl_info->max_sectors = max_transfer_size / 512;
4710 }
4711
4712 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4713 {
4714         int num_queue_groups;
4715         u16 num_elements_per_iq;
4716         u16 num_elements_per_oq;
4717
4718         if (reset_devices) {
4719                 num_queue_groups = 1;
4720         } else {
4721                 int num_cpus;
4722                 int max_queue_groups;
4723
4724                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4725                         ctrl_info->max_outbound_queues - 1);
4726                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4727
4728                 num_cpus = num_online_cpus();
4729                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4730                 num_queue_groups = min(num_queue_groups, max_queue_groups);
4731         }
4732
4733         ctrl_info->num_queue_groups = num_queue_groups;
4734         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
4735
4736         /*
4737          * Make sure that the max. inbound IU length is an even multiple
4738          * of our inbound element length.
4739          */
4740         ctrl_info->max_inbound_iu_length =
4741                 (ctrl_info->max_inbound_iu_length_per_firmware /
4742                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4743                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4744
4745         num_elements_per_iq =
4746                 (ctrl_info->max_inbound_iu_length /
4747                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4748
4749         /* Add one because one element in each queue is unusable. */
4750         num_elements_per_iq++;
4751
4752         num_elements_per_iq = min(num_elements_per_iq,
4753                 ctrl_info->max_elements_per_iq);
4754
4755         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4756         num_elements_per_oq = min(num_elements_per_oq,
4757                 ctrl_info->max_elements_per_oq);
4758
4759         ctrl_info->num_elements_per_iq = num_elements_per_iq;
4760         ctrl_info->num_elements_per_oq = num_elements_per_oq;
4761
4762         ctrl_info->max_sg_per_iu =
4763                 ((ctrl_info->max_inbound_iu_length -
4764                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4765                 sizeof(struct pqi_sg_descriptor)) +
4766                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4767 }
4768
4769 static inline void pqi_set_sg_descriptor(
4770         struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4771 {
4772         u64 address = (u64)sg_dma_address(sg);
4773         unsigned int length = sg_dma_len(sg);
4774
4775         put_unaligned_le64(address, &sg_descriptor->address);
4776         put_unaligned_le32(length, &sg_descriptor->length);
4777         put_unaligned_le32(0, &sg_descriptor->flags);
4778 }
4779
4780 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4781         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4782         struct pqi_io_request *io_request)
4783 {
4784         int i;
4785         u16 iu_length;
4786         int sg_count;
4787         bool chained;
4788         unsigned int num_sg_in_iu;
4789         unsigned int max_sg_per_iu;
4790         struct scatterlist *sg;
4791         struct pqi_sg_descriptor *sg_descriptor;
4792
4793         sg_count = scsi_dma_map(scmd);
4794         if (sg_count < 0)
4795                 return sg_count;
4796
4797         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4798                 PQI_REQUEST_HEADER_LENGTH;
4799
4800         if (sg_count == 0)
4801                 goto out;
4802
4803         sg = scsi_sglist(scmd);
4804         sg_descriptor = request->sg_descriptors;
4805         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4806         chained = false;
4807         num_sg_in_iu = 0;
4808         i = 0;
4809
4810         while (1) {
4811                 pqi_set_sg_descriptor(sg_descriptor, sg);
4812                 if (!chained)
4813                         num_sg_in_iu++;
4814                 i++;
4815                 if (i == sg_count)
4816                         break;
4817                 sg_descriptor++;
4818                 if (i == max_sg_per_iu) {
4819                         put_unaligned_le64(
4820                                 (u64)io_request->sg_chain_buffer_dma_handle,
4821                                 &sg_descriptor->address);
4822                         put_unaligned_le32((sg_count - num_sg_in_iu)
4823                                 * sizeof(*sg_descriptor),
4824                                 &sg_descriptor->length);
4825                         put_unaligned_le32(CISS_SG_CHAIN,
4826                                 &sg_descriptor->flags);
4827                         chained = true;
4828                         num_sg_in_iu++;
4829                         sg_descriptor = io_request->sg_chain_buffer;
4830                 }
4831                 sg = sg_next(sg);
4832         }
4833
4834         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4835         request->partial = chained;
4836         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4837
4838 out:
4839         put_unaligned_le16(iu_length, &request->header.iu_length);
4840
4841         return 0;
4842 }
4843
4844 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4845         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4846         struct pqi_io_request *io_request)
4847 {
4848         int i;
4849         u16 iu_length;
4850         int sg_count;
4851         bool chained;
4852         unsigned int num_sg_in_iu;
4853         unsigned int max_sg_per_iu;
4854         struct scatterlist *sg;
4855         struct pqi_sg_descriptor *sg_descriptor;
4856
4857         sg_count = scsi_dma_map(scmd);
4858         if (sg_count < 0)
4859                 return sg_count;
4860
4861         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4862                 PQI_REQUEST_HEADER_LENGTH;
4863         num_sg_in_iu = 0;
4864
4865         if (sg_count == 0)
4866                 goto out;
4867
4868         sg = scsi_sglist(scmd);
4869         sg_descriptor = request->sg_descriptors;
4870         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4871         chained = false;
4872         i = 0;
4873
4874         while (1) {
4875                 pqi_set_sg_descriptor(sg_descriptor, sg);
4876                 if (!chained)
4877                         num_sg_in_iu++;
4878                 i++;
4879                 if (i == sg_count)
4880                         break;
4881                 sg_descriptor++;
4882                 if (i == max_sg_per_iu) {
4883                         put_unaligned_le64(
4884                                 (u64)io_request->sg_chain_buffer_dma_handle,
4885                                 &sg_descriptor->address);
4886                         put_unaligned_le32((sg_count - num_sg_in_iu)
4887                                 * sizeof(*sg_descriptor),
4888                                 &sg_descriptor->length);
4889                         put_unaligned_le32(CISS_SG_CHAIN,
4890                                 &sg_descriptor->flags);
4891                         chained = true;
4892                         num_sg_in_iu++;
4893                         sg_descriptor = io_request->sg_chain_buffer;
4894                 }
4895                 sg = sg_next(sg);
4896         }
4897
4898         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4899         request->partial = chained;
4900         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4901
4902 out:
4903         put_unaligned_le16(iu_length, &request->header.iu_length);
4904         request->num_sg_descriptors = num_sg_in_iu;
4905
4906         return 0;
4907 }
4908
4909 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4910         void *context)
4911 {
4912         struct scsi_cmnd *scmd;
4913
4914         scmd = io_request->scmd;
4915         pqi_free_io_request(io_request);
4916         scsi_dma_unmap(scmd);
4917         pqi_scsi_done(scmd);
4918 }
4919
4920 static int pqi_raid_submit_scsi_cmd_with_io_request(
4921         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
4922         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4923         struct pqi_queue_group *queue_group)
4924 {
4925         int rc;
4926         size_t cdb_length;
4927         struct pqi_raid_path_request *request;
4928
4929         io_request->io_complete_callback = pqi_raid_io_complete;
4930         io_request->scmd = scmd;
4931
4932         request = io_request->iu;
4933         memset(request, 0,
4934                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4935
4936         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4937         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4938         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4939         put_unaligned_le16(io_request->index, &request->request_id);
4940         request->error_index = request->request_id;
4941         memcpy(request->lun_number, device->scsi3addr,
4942                 sizeof(request->lun_number));
4943
4944         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4945         memcpy(request->cdb, scmd->cmnd, cdb_length);
4946
4947         switch (cdb_length) {
4948         case 6:
4949         case 10:
4950         case 12:
4951         case 16:
4952                 /* No bytes in the Additional CDB bytes field */
4953                 request->additional_cdb_bytes_usage =
4954                         SOP_ADDITIONAL_CDB_BYTES_0;
4955                 break;
4956         case 20:
4957                 /* 4 bytes in the Additional cdb field */
4958                 request->additional_cdb_bytes_usage =
4959                         SOP_ADDITIONAL_CDB_BYTES_4;
4960                 break;
4961         case 24:
4962                 /* 8 bytes in the Additional cdb field */
4963                 request->additional_cdb_bytes_usage =
4964                         SOP_ADDITIONAL_CDB_BYTES_8;
4965                 break;
4966         case 28:
4967                 /* 12 bytes in the Additional cdb field */
4968                 request->additional_cdb_bytes_usage =
4969                         SOP_ADDITIONAL_CDB_BYTES_12;
4970                 break;
4971         case 32:
4972         default:
4973                 /* 16 bytes in the Additional cdb field */
4974                 request->additional_cdb_bytes_usage =
4975                         SOP_ADDITIONAL_CDB_BYTES_16;
4976                 break;
4977         }
4978
4979         switch (scmd->sc_data_direction) {
4980         case DMA_TO_DEVICE:
4981                 request->data_direction = SOP_READ_FLAG;
4982                 break;
4983         case DMA_FROM_DEVICE:
4984                 request->data_direction = SOP_WRITE_FLAG;
4985                 break;
4986         case DMA_NONE:
4987                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4988                 break;
4989         case DMA_BIDIRECTIONAL:
4990                 request->data_direction = SOP_BIDIRECTIONAL;
4991                 break;
4992         default:
4993                 dev_err(&ctrl_info->pci_dev->dev,
4994                         "unknown data direction: %d\n",
4995                         scmd->sc_data_direction);
4996                 break;
4997         }
4998
4999         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
5000         if (rc) {
5001                 pqi_free_io_request(io_request);
5002                 return SCSI_MLQUEUE_HOST_BUSY;
5003         }
5004
5005         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
5006
5007         return 0;
5008 }
5009
5010 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5011         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5012         struct pqi_queue_group *queue_group)
5013 {
5014         struct pqi_io_request *io_request;
5015
5016         io_request = pqi_alloc_io_request(ctrl_info);
5017
5018         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5019                 device, scmd, queue_group);
5020 }
5021
5022 static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info)
5023 {
5024         if (!pqi_ctrl_blocked(ctrl_info))
5025                 schedule_work(&ctrl_info->raid_bypass_retry_work);
5026 }
5027
5028 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
5029 {
5030         struct scsi_cmnd *scmd;
5031         struct pqi_scsi_dev *device;
5032         struct pqi_ctrl_info *ctrl_info;
5033
5034         if (!io_request->raid_bypass)
5035                 return false;
5036
5037         scmd = io_request->scmd;
5038         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
5039                 return false;
5040         if (host_byte(scmd->result) == DID_NO_CONNECT)
5041                 return false;
5042
5043         device = scmd->device->hostdata;
5044         if (pqi_device_offline(device))
5045                 return false;
5046
5047         ctrl_info = shost_to_hba(scmd->device->host);
5048         if (pqi_ctrl_offline(ctrl_info))
5049                 return false;
5050
5051         return true;
5052 }
5053
5054 static inline void pqi_add_to_raid_bypass_retry_list(
5055         struct pqi_ctrl_info *ctrl_info,
5056         struct pqi_io_request *io_request, bool at_head)
5057 {
5058         unsigned long flags;
5059
5060         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5061         if (at_head)
5062                 list_add(&io_request->request_list_entry,
5063                         &ctrl_info->raid_bypass_retry_list);
5064         else
5065                 list_add_tail(&io_request->request_list_entry,
5066                         &ctrl_info->raid_bypass_retry_list);
5067         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5068 }
5069
5070 static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request,
5071         void *context)
5072 {
5073         struct scsi_cmnd *scmd;
5074
5075         scmd = io_request->scmd;
5076         pqi_free_io_request(io_request);
5077         pqi_scsi_done(scmd);
5078 }
5079
5080 static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request)
5081 {
5082         struct scsi_cmnd *scmd;
5083         struct pqi_ctrl_info *ctrl_info;
5084
5085         io_request->io_complete_callback = pqi_queued_raid_bypass_complete;
5086         scmd = io_request->scmd;
5087         scmd->result = 0;
5088         ctrl_info = shost_to_hba(scmd->device->host);
5089
5090         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false);
5091         pqi_schedule_bypass_retry(ctrl_info);
5092 }
5093
5094 static int pqi_retry_raid_bypass(struct pqi_io_request *io_request)
5095 {
5096         struct scsi_cmnd *scmd;
5097         struct pqi_scsi_dev *device;
5098         struct pqi_ctrl_info *ctrl_info;
5099         struct pqi_queue_group *queue_group;
5100
5101         scmd = io_request->scmd;
5102         device = scmd->device->hostdata;
5103         if (pqi_device_in_reset(device)) {
5104                 pqi_free_io_request(io_request);
5105                 set_host_byte(scmd, DID_RESET);
5106                 pqi_scsi_done(scmd);
5107                 return 0;
5108         }
5109
5110         ctrl_info = shost_to_hba(scmd->device->host);
5111         queue_group = io_request->queue_group;
5112
5113         pqi_reinit_io_request(io_request);
5114
5115         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5116                 device, scmd, queue_group);
5117 }
5118
5119 static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request(
5120         struct pqi_ctrl_info *ctrl_info)
5121 {
5122         unsigned long flags;
5123         struct pqi_io_request *io_request;
5124
5125         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5126         io_request = list_first_entry_or_null(
5127                 &ctrl_info->raid_bypass_retry_list,
5128                 struct pqi_io_request, request_list_entry);
5129         if (io_request)
5130                 list_del(&io_request->request_list_entry);
5131         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5132
5133         return io_request;
5134 }
5135
5136 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info)
5137 {
5138         int rc;
5139         struct pqi_io_request *io_request;
5140
5141         pqi_ctrl_busy(ctrl_info);
5142
5143         while (1) {
5144                 if (pqi_ctrl_blocked(ctrl_info))
5145                         break;
5146                 io_request = pqi_next_queued_raid_bypass_request(ctrl_info);
5147                 if (!io_request)
5148                         break;
5149                 rc = pqi_retry_raid_bypass(io_request);
5150                 if (rc) {
5151                         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request,
5152                                 true);
5153                         pqi_schedule_bypass_retry(ctrl_info);
5154                         break;
5155                 }
5156         }
5157
5158         pqi_ctrl_unbusy(ctrl_info);
5159 }
5160
5161 static void pqi_raid_bypass_retry_worker(struct work_struct *work)
5162 {
5163         struct pqi_ctrl_info *ctrl_info;
5164
5165         ctrl_info = container_of(work, struct pqi_ctrl_info,
5166                 raid_bypass_retry_work);
5167         pqi_retry_raid_bypass_requests(ctrl_info);
5168 }
5169
5170 static void pqi_clear_all_queued_raid_bypass_retries(
5171         struct pqi_ctrl_info *ctrl_info)
5172 {
5173         unsigned long flags;
5174
5175         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5176         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
5177         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5178 }
5179
5180 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
5181         void *context)
5182 {
5183         struct scsi_cmnd *scmd;
5184
5185         scmd = io_request->scmd;
5186         scsi_dma_unmap(scmd);
5187         if (io_request->status == -EAGAIN)
5188                 set_host_byte(scmd, DID_IMM_RETRY);
5189         else if (pqi_raid_bypass_retry_needed(io_request)) {
5190                 pqi_queue_raid_bypass_retry(io_request);
5191                 return;
5192         }
5193         pqi_free_io_request(io_request);
5194         pqi_scsi_done(scmd);
5195 }
5196
5197 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5198         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5199         struct pqi_queue_group *queue_group)
5200 {
5201         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
5202                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
5203 }
5204
5205 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
5206         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
5207         unsigned int cdb_length, struct pqi_queue_group *queue_group,
5208         struct pqi_encryption_info *encryption_info, bool raid_bypass)
5209 {
5210         int rc;
5211         struct pqi_io_request *io_request;
5212         struct pqi_aio_path_request *request;
5213
5214         io_request = pqi_alloc_io_request(ctrl_info);
5215         io_request->io_complete_callback = pqi_aio_io_complete;
5216         io_request->scmd = scmd;
5217         io_request->raid_bypass = raid_bypass;
5218
5219         request = io_request->iu;
5220         memset(request, 0,
5221                 offsetof(struct pqi_raid_path_request, sg_descriptors));
5222
5223         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
5224         put_unaligned_le32(aio_handle, &request->nexus_id);
5225         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5226         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5227         put_unaligned_le16(io_request->index, &request->request_id);
5228         request->error_index = request->request_id;
5229         if (cdb_length > sizeof(request->cdb))
5230                 cdb_length = sizeof(request->cdb);
5231         request->cdb_length = cdb_length;
5232         memcpy(request->cdb, cdb, cdb_length);
5233
5234         switch (scmd->sc_data_direction) {
5235         case DMA_TO_DEVICE:
5236                 request->data_direction = SOP_READ_FLAG;
5237                 break;
5238         case DMA_FROM_DEVICE:
5239                 request->data_direction = SOP_WRITE_FLAG;
5240                 break;
5241         case DMA_NONE:
5242                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5243                 break;
5244         case DMA_BIDIRECTIONAL:
5245                 request->data_direction = SOP_BIDIRECTIONAL;
5246                 break;
5247         default:
5248                 dev_err(&ctrl_info->pci_dev->dev,
5249                         "unknown data direction: %d\n",
5250                         scmd->sc_data_direction);
5251                 break;
5252         }
5253
5254         if (encryption_info) {
5255                 request->encryption_enable = true;
5256                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5257                         &request->data_encryption_key_index);
5258                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5259                         &request->encrypt_tweak_lower);
5260                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5261                         &request->encrypt_tweak_upper);
5262         }
5263
5264         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
5265         if (rc) {
5266                 pqi_free_io_request(io_request);
5267                 return SCSI_MLQUEUE_HOST_BUSY;
5268         }
5269
5270         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5271
5272         return 0;
5273 }
5274
5275 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
5276         struct scsi_cmnd *scmd)
5277 {
5278         u16 hw_queue;
5279
5280         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
5281         if (hw_queue > ctrl_info->max_hw_queue_index)
5282                 hw_queue = 0;
5283
5284         return hw_queue;
5285 }
5286
5287 /*
5288  * This function gets called just before we hand the completed SCSI request
5289  * back to the SML.
5290  */
5291
5292 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
5293 {
5294         struct pqi_scsi_dev *device;
5295
5296         if (!scmd->device) {
5297                 set_host_byte(scmd, DID_NO_CONNECT);
5298                 return;
5299         }
5300
5301         device = scmd->device->hostdata;
5302         if (!device) {
5303                 set_host_byte(scmd, DID_NO_CONNECT);
5304                 return;
5305         }
5306
5307         atomic_dec(&device->scsi_cmds_outstanding);
5308 }
5309
5310 static int pqi_scsi_queue_command(struct Scsi_Host *shost,
5311         struct scsi_cmnd *scmd)
5312 {
5313         int rc;
5314         struct pqi_ctrl_info *ctrl_info;
5315         struct pqi_scsi_dev *device;
5316         u16 hw_queue;
5317         struct pqi_queue_group *queue_group;
5318         bool raid_bypassed;
5319
5320         device = scmd->device->hostdata;
5321         ctrl_info = shost_to_hba(shost);
5322
5323         if (!device) {
5324                 set_host_byte(scmd, DID_NO_CONNECT);
5325                 pqi_scsi_done(scmd);
5326                 return 0;
5327         }
5328
5329         atomic_inc(&device->scsi_cmds_outstanding);
5330
5331         if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(ctrl_info,
5332                                                                 device)) {
5333                 set_host_byte(scmd, DID_NO_CONNECT);
5334                 pqi_scsi_done(scmd);
5335                 return 0;
5336         }
5337
5338         pqi_ctrl_busy(ctrl_info);
5339         if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device) ||
5340             pqi_ctrl_in_ofa(ctrl_info)) {
5341                 rc = SCSI_MLQUEUE_HOST_BUSY;
5342                 goto out;
5343         }
5344
5345         /*
5346          * This is necessary because the SML doesn't zero out this field during
5347          * error recovery.
5348          */
5349         scmd->result = 0;
5350
5351         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
5352         queue_group = &ctrl_info->queue_groups[hw_queue];
5353
5354         if (pqi_is_logical_device(device)) {
5355                 raid_bypassed = false;
5356                 if (device->raid_bypass_enabled &&
5357                                 !blk_rq_is_passthrough(scmd->request)) {
5358                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
5359                                 scmd, queue_group);
5360                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY)
5361                                 raid_bypassed = true;
5362                 }
5363                 if (!raid_bypassed)
5364                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5365                                 queue_group);
5366         } else {
5367                 if (device->aio_enabled)
5368                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
5369                                 queue_group);
5370                 else
5371                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5372                                 queue_group);
5373         }
5374
5375 out:
5376         pqi_ctrl_unbusy(ctrl_info);
5377         if (rc)
5378                 atomic_dec(&device->scsi_cmds_outstanding);
5379
5380         return rc;
5381 }
5382
5383 static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
5384         struct pqi_queue_group *queue_group)
5385 {
5386         unsigned int path;
5387         unsigned long flags;
5388         bool list_is_empty;
5389
5390         for (path = 0; path < 2; path++) {
5391                 while (1) {
5392                         spin_lock_irqsave(
5393                                 &queue_group->submit_lock[path], flags);
5394                         list_is_empty =
5395                                 list_empty(&queue_group->request_list[path]);
5396                         spin_unlock_irqrestore(
5397                                 &queue_group->submit_lock[path], flags);
5398                         if (list_is_empty)
5399                                 break;
5400                         pqi_check_ctrl_health(ctrl_info);
5401                         if (pqi_ctrl_offline(ctrl_info))
5402                                 return -ENXIO;
5403                         usleep_range(1000, 2000);
5404                 }
5405         }
5406
5407         return 0;
5408 }
5409
5410 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5411 {
5412         int rc;
5413         unsigned int i;
5414         unsigned int path;
5415         struct pqi_queue_group *queue_group;
5416         pqi_index_t iq_pi;
5417         pqi_index_t iq_ci;
5418
5419         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5420                 queue_group = &ctrl_info->queue_groups[i];
5421
5422                 rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5423                 if (rc)
5424                         return rc;
5425
5426                 for (path = 0; path < 2; path++) {
5427                         iq_pi = queue_group->iq_pi_copy[path];
5428
5429                         while (1) {
5430                                 iq_ci = readl(queue_group->iq_ci[path]);
5431                                 if (iq_ci == iq_pi)
5432                                         break;
5433                                 pqi_check_ctrl_health(ctrl_info);
5434                                 if (pqi_ctrl_offline(ctrl_info))
5435                                         return -ENXIO;
5436                                 usleep_range(1000, 2000);
5437                         }
5438                 }
5439         }
5440
5441         return 0;
5442 }
5443
5444 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5445         struct pqi_scsi_dev *device)
5446 {
5447         unsigned int i;
5448         unsigned int path;
5449         struct pqi_queue_group *queue_group;
5450         unsigned long flags;
5451         struct pqi_io_request *io_request;
5452         struct pqi_io_request *next;
5453         struct scsi_cmnd *scmd;
5454         struct pqi_scsi_dev *scsi_device;
5455
5456         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5457                 queue_group = &ctrl_info->queue_groups[i];
5458
5459                 for (path = 0; path < 2; path++) {
5460                         spin_lock_irqsave(
5461                                 &queue_group->submit_lock[path], flags);
5462
5463                         list_for_each_entry_safe(io_request, next,
5464                                 &queue_group->request_list[path],
5465                                 request_list_entry) {
5466                                 scmd = io_request->scmd;
5467                                 if (!scmd)
5468                                         continue;
5469
5470                                 scsi_device = scmd->device->hostdata;
5471                                 if (scsi_device != device)
5472                                         continue;
5473
5474                                 list_del(&io_request->request_list_entry);
5475                                 set_host_byte(scmd, DID_RESET);
5476                                 pqi_scsi_done(scmd);
5477                         }
5478
5479                         spin_unlock_irqrestore(
5480                                 &queue_group->submit_lock[path], flags);
5481                 }
5482         }
5483 }
5484
5485 static void pqi_fail_io_queued_for_all_devices(struct pqi_ctrl_info *ctrl_info)
5486 {
5487         unsigned int i;
5488         unsigned int path;
5489         struct pqi_queue_group *queue_group;
5490         unsigned long flags;
5491         struct pqi_io_request *io_request;
5492         struct pqi_io_request *next;
5493         struct scsi_cmnd *scmd;
5494
5495         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5496                 queue_group = &ctrl_info->queue_groups[i];
5497
5498                 for (path = 0; path < 2; path++) {
5499                         spin_lock_irqsave(&queue_group->submit_lock[path],
5500                                                 flags);
5501
5502                         list_for_each_entry_safe(io_request, next,
5503                                 &queue_group->request_list[path],
5504                                 request_list_entry) {
5505
5506                                 scmd = io_request->scmd;
5507                                 if (!scmd)
5508                                         continue;
5509
5510                                 list_del(&io_request->request_list_entry);
5511                                 set_host_byte(scmd, DID_RESET);
5512                                 pqi_scsi_done(scmd);
5513                         }
5514
5515                         spin_unlock_irqrestore(
5516                                 &queue_group->submit_lock[path], flags);
5517                 }
5518         }
5519 }
5520
5521 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5522         struct pqi_scsi_dev *device, unsigned long timeout_secs)
5523 {
5524         unsigned long timeout;
5525
5526         timeout = (timeout_secs * PQI_HZ) + jiffies;
5527
5528         while (atomic_read(&device->scsi_cmds_outstanding)) {
5529                 pqi_check_ctrl_health(ctrl_info);
5530                 if (pqi_ctrl_offline(ctrl_info))
5531                         return -ENXIO;
5532                 if (timeout_secs != NO_TIMEOUT) {
5533                         if (time_after(jiffies, timeout)) {
5534                                 dev_err(&ctrl_info->pci_dev->dev,
5535                                         "timed out waiting for pending IO\n");
5536                                 return -ETIMEDOUT;
5537                         }
5538                 }
5539                 usleep_range(1000, 2000);
5540         }
5541
5542         return 0;
5543 }
5544
5545 static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5546         unsigned long timeout_secs)
5547 {
5548         bool io_pending;
5549         unsigned long flags;
5550         unsigned long timeout;
5551         struct pqi_scsi_dev *device;
5552
5553         timeout = (timeout_secs * PQI_HZ) + jiffies;
5554         while (1) {
5555                 io_pending = false;
5556
5557                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5558                 list_for_each_entry(device, &ctrl_info->scsi_device_list,
5559                         scsi_device_list_entry) {
5560                         if (atomic_read(&device->scsi_cmds_outstanding)) {
5561                                 io_pending = true;
5562                                 break;
5563                         }
5564                 }
5565                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5566                                         flags);
5567
5568                 if (!io_pending)
5569                         break;
5570
5571                 pqi_check_ctrl_health(ctrl_info);
5572                 if (pqi_ctrl_offline(ctrl_info))
5573                         return -ENXIO;
5574
5575                 if (timeout_secs != NO_TIMEOUT) {
5576                         if (time_after(jiffies, timeout)) {
5577                                 dev_err(&ctrl_info->pci_dev->dev,
5578                                         "timed out waiting for pending IO\n");
5579                                 return -ETIMEDOUT;
5580                         }
5581                 }
5582                 usleep_range(1000, 2000);
5583         }
5584
5585         return 0;
5586 }
5587
5588 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5589         void *context)
5590 {
5591         struct completion *waiting = context;
5592
5593         complete(waiting);
5594 }
5595
5596 #define PQI_LUN_RESET_TIMEOUT_SECS      10
5597
5598 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5599         struct pqi_scsi_dev *device, struct completion *wait)
5600 {
5601         int rc;
5602
5603         while (1) {
5604                 if (wait_for_completion_io_timeout(wait,
5605                         PQI_LUN_RESET_TIMEOUT_SECS * PQI_HZ)) {
5606                         rc = 0;
5607                         break;
5608                 }
5609
5610                 pqi_check_ctrl_health(ctrl_info);
5611                 if (pqi_ctrl_offline(ctrl_info)) {
5612                         rc = -ENXIO;
5613                         break;
5614                 }
5615         }
5616
5617         return rc;
5618 }
5619
5620 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
5621         struct pqi_scsi_dev *device)
5622 {
5623         int rc;
5624         struct pqi_io_request *io_request;
5625         DECLARE_COMPLETION_ONSTACK(wait);
5626         struct pqi_task_management_request *request;
5627
5628         io_request = pqi_alloc_io_request(ctrl_info);
5629         io_request->io_complete_callback = pqi_lun_reset_complete;
5630         io_request->context = &wait;
5631
5632         request = io_request->iu;
5633         memset(request, 0, sizeof(*request));
5634
5635         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5636         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5637                 &request->header.iu_length);
5638         put_unaligned_le16(io_request->index, &request->request_id);
5639         memcpy(request->lun_number, device->scsi3addr,
5640                 sizeof(request->lun_number));
5641         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5642
5643         pqi_start_io(ctrl_info,
5644                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5645                 io_request);
5646
5647         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5648         if (rc == 0)
5649                 rc = io_request->status;
5650
5651         pqi_free_io_request(io_request);
5652
5653         return rc;
5654 }
5655
5656 /* Performs a reset at the LUN level. */
5657
5658 #define PQI_LUN_RESET_RETRIES                   3
5659 #define PQI_LUN_RESET_RETRY_INTERVAL_MSECS      10000
5660 #define PQI_LUN_RESET_PENDING_IO_TIMEOUT_SECS   120
5661
5662 static int _pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5663         struct pqi_scsi_dev *device)
5664 {
5665         int rc;
5666         unsigned int retries;
5667         unsigned long timeout_secs;
5668
5669         for (retries = 0;;) {
5670                 rc = pqi_lun_reset(ctrl_info, device);
5671                 if (rc != -EAGAIN || ++retries > PQI_LUN_RESET_RETRIES)
5672                         break;
5673                 msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
5674         }
5675
5676         timeout_secs = rc ? PQI_LUN_RESET_PENDING_IO_TIMEOUT_SECS : NO_TIMEOUT;
5677
5678         rc |= pqi_device_wait_for_pending_io(ctrl_info, device, timeout_secs);
5679
5680         return rc == 0 ? SUCCESS : FAILED;
5681 }
5682
5683 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5684         struct pqi_scsi_dev *device)
5685 {
5686         int rc;
5687
5688         mutex_lock(&ctrl_info->lun_reset_mutex);
5689
5690         pqi_ctrl_block_requests(ctrl_info);
5691         pqi_ctrl_wait_until_quiesced(ctrl_info);
5692         pqi_fail_io_queued_for_device(ctrl_info, device);
5693         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
5694         pqi_device_reset_start(device);
5695         pqi_ctrl_unblock_requests(ctrl_info);
5696
5697         if (rc)
5698                 rc = FAILED;
5699         else
5700                 rc = _pqi_device_reset(ctrl_info, device);
5701
5702         pqi_device_reset_done(device);
5703
5704         mutex_unlock(&ctrl_info->lun_reset_mutex);
5705
5706         return rc;
5707 }
5708
5709 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
5710 {
5711         int rc;
5712         struct Scsi_Host *shost;
5713         struct pqi_ctrl_info *ctrl_info;
5714         struct pqi_scsi_dev *device;
5715
5716         shost = scmd->device->host;
5717         ctrl_info = shost_to_hba(shost);
5718         device = scmd->device->hostdata;
5719
5720         dev_err(&ctrl_info->pci_dev->dev,
5721                 "resetting scsi %d:%d:%d:%d\n",
5722                 shost->host_no, device->bus, device->target, device->lun);
5723
5724         pqi_check_ctrl_health(ctrl_info);
5725         if (pqi_ctrl_offline(ctrl_info)) {
5726                 dev_err(&ctrl_info->pci_dev->dev,
5727                         "controller %u offlined - cannot send device reset\n",
5728                         ctrl_info->ctrl_id);
5729                 rc = FAILED;
5730                 goto out;
5731         }
5732
5733         pqi_wait_until_ofa_finished(ctrl_info);
5734
5735         rc = pqi_device_reset(ctrl_info, device);
5736
5737 out:
5738         dev_err(&ctrl_info->pci_dev->dev,
5739                 "reset of scsi %d:%d:%d:%d: %s\n",
5740                 shost->host_no, device->bus, device->target, device->lun,
5741                 rc == SUCCESS ? "SUCCESS" : "FAILED");
5742
5743         return rc;
5744 }
5745
5746 static int pqi_slave_alloc(struct scsi_device *sdev)
5747 {
5748         struct pqi_scsi_dev *device;
5749         unsigned long flags;
5750         struct pqi_ctrl_info *ctrl_info;
5751         struct scsi_target *starget;
5752         struct sas_rphy *rphy;
5753
5754         ctrl_info = shost_to_hba(sdev->host);
5755
5756         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5757
5758         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
5759                 starget = scsi_target(sdev);
5760                 rphy = target_to_rphy(starget);
5761                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
5762                 if (device) {
5763                         device->target = sdev_id(sdev);
5764                         device->lun = sdev->lun;
5765                         device->target_lun_valid = true;
5766                 }
5767         } else {
5768                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
5769                         sdev_id(sdev), sdev->lun);
5770         }
5771
5772         if (device) {
5773                 sdev->hostdata = device;
5774                 device->sdev = sdev;
5775                 if (device->queue_depth) {
5776                         device->advertised_queue_depth = device->queue_depth;
5777                         scsi_change_queue_depth(sdev,
5778                                 device->advertised_queue_depth);
5779                 }
5780                 if (pqi_is_logical_device(device))
5781                         pqi_disable_write_same(sdev);
5782                 else
5783                         sdev->allow_restart = 1;
5784         }
5785
5786         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5787
5788         return 0;
5789 }
5790
5791 static int pqi_map_queues(struct Scsi_Host *shost)
5792 {
5793         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
5794
5795         return blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
5796                                         ctrl_info->pci_dev, 0);
5797 }
5798
5799 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
5800         void __user *arg)
5801 {
5802         struct pci_dev *pci_dev;
5803         u32 subsystem_vendor;
5804         u32 subsystem_device;
5805         cciss_pci_info_struct pciinfo;
5806
5807         if (!arg)
5808                 return -EINVAL;
5809
5810         pci_dev = ctrl_info->pci_dev;
5811
5812         pciinfo.domain = pci_domain_nr(pci_dev->bus);
5813         pciinfo.bus = pci_dev->bus->number;
5814         pciinfo.dev_fn = pci_dev->devfn;
5815         subsystem_vendor = pci_dev->subsystem_vendor;
5816         subsystem_device = pci_dev->subsystem_device;
5817         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
5818                 subsystem_vendor;
5819
5820         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
5821                 return -EFAULT;
5822
5823         return 0;
5824 }
5825
5826 static int pqi_getdrivver_ioctl(void __user *arg)
5827 {
5828         u32 version;
5829
5830         if (!arg)
5831                 return -EINVAL;
5832
5833         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
5834                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
5835
5836         if (copy_to_user(arg, &version, sizeof(version)))
5837                 return -EFAULT;
5838
5839         return 0;
5840 }
5841
5842 struct ciss_error_info {
5843         u8      scsi_status;
5844         int     command_status;
5845         size_t  sense_data_length;
5846 };
5847
5848 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
5849         struct ciss_error_info *ciss_error_info)
5850 {
5851         int ciss_cmd_status;
5852         size_t sense_data_length;
5853
5854         switch (pqi_error_info->data_out_result) {
5855         case PQI_DATA_IN_OUT_GOOD:
5856                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
5857                 break;
5858         case PQI_DATA_IN_OUT_UNDERFLOW:
5859                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
5860                 break;
5861         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
5862                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
5863                 break;
5864         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
5865         case PQI_DATA_IN_OUT_BUFFER_ERROR:
5866         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
5867         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
5868         case PQI_DATA_IN_OUT_ERROR:
5869                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
5870                 break;
5871         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
5872         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
5873         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
5874         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
5875         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
5876         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
5877         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
5878         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
5879         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
5880         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
5881                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
5882                 break;
5883         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
5884                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
5885                 break;
5886         case PQI_DATA_IN_OUT_ABORTED:
5887                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
5888                 break;
5889         case PQI_DATA_IN_OUT_TIMEOUT:
5890                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
5891                 break;
5892         default:
5893                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
5894                 break;
5895         }
5896
5897         sense_data_length =
5898                 get_unaligned_le16(&pqi_error_info->sense_data_length);
5899         if (sense_data_length == 0)
5900                 sense_data_length =
5901                 get_unaligned_le16(&pqi_error_info->response_data_length);
5902         if (sense_data_length)
5903                 if (sense_data_length > sizeof(pqi_error_info->data))
5904                         sense_data_length = sizeof(pqi_error_info->data);
5905
5906         ciss_error_info->scsi_status = pqi_error_info->status;
5907         ciss_error_info->command_status = ciss_cmd_status;
5908         ciss_error_info->sense_data_length = sense_data_length;
5909 }
5910
5911 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5912 {
5913         int rc;
5914         char *kernel_buffer = NULL;
5915         u16 iu_length;
5916         size_t sense_data_length;
5917         IOCTL_Command_struct iocommand;
5918         struct pqi_raid_path_request request;
5919         struct pqi_raid_error_info pqi_error_info;
5920         struct ciss_error_info ciss_error_info;
5921
5922         if (pqi_ctrl_offline(ctrl_info))
5923                 return -ENXIO;
5924         if (!arg)
5925                 return -EINVAL;
5926         if (!capable(CAP_SYS_RAWIO))
5927                 return -EPERM;
5928         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
5929                 return -EFAULT;
5930         if (iocommand.buf_size < 1 &&
5931                 iocommand.Request.Type.Direction != XFER_NONE)
5932                 return -EINVAL;
5933         if (iocommand.Request.CDBLen > sizeof(request.cdb))
5934                 return -EINVAL;
5935         if (iocommand.Request.Type.Type != TYPE_CMD)
5936                 return -EINVAL;
5937
5938         switch (iocommand.Request.Type.Direction) {
5939         case XFER_NONE:
5940         case XFER_WRITE:
5941         case XFER_READ:
5942         case XFER_READ | XFER_WRITE:
5943                 break;
5944         default:
5945                 return -EINVAL;
5946         }
5947
5948         if (iocommand.buf_size > 0) {
5949                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
5950                 if (!kernel_buffer)
5951                         return -ENOMEM;
5952                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
5953                         if (copy_from_user(kernel_buffer, iocommand.buf,
5954                                 iocommand.buf_size)) {
5955                                 rc = -EFAULT;
5956                                 goto out;
5957                         }
5958                 } else {
5959                         memset(kernel_buffer, 0, iocommand.buf_size);
5960                 }
5961         }
5962
5963         memset(&request, 0, sizeof(request));
5964
5965         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5966         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5967                 PQI_REQUEST_HEADER_LENGTH;
5968         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
5969                 sizeof(request.lun_number));
5970         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
5971         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5972
5973         switch (iocommand.Request.Type.Direction) {
5974         case XFER_NONE:
5975                 request.data_direction = SOP_NO_DIRECTION_FLAG;
5976                 break;
5977         case XFER_WRITE:
5978                 request.data_direction = SOP_WRITE_FLAG;
5979                 break;
5980         case XFER_READ:
5981                 request.data_direction = SOP_READ_FLAG;
5982                 break;
5983         case XFER_READ | XFER_WRITE:
5984                 request.data_direction = SOP_BIDIRECTIONAL;
5985                 break;
5986         }
5987
5988         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5989
5990         if (iocommand.buf_size > 0) {
5991                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
5992
5993                 rc = pqi_map_single(ctrl_info->pci_dev,
5994                         &request.sg_descriptors[0], kernel_buffer,
5995                         iocommand.buf_size, DMA_BIDIRECTIONAL);
5996                 if (rc)
5997                         goto out;
5998
5999                 iu_length += sizeof(request.sg_descriptors[0]);
6000         }
6001
6002         put_unaligned_le16(iu_length, &request.header.iu_length);
6003
6004         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6005                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
6006
6007         if (iocommand.buf_size > 0)
6008                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
6009                         DMA_BIDIRECTIONAL);
6010
6011         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
6012
6013         if (rc == 0) {
6014                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
6015                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
6016                 iocommand.error_info.CommandStatus =
6017                         ciss_error_info.command_status;
6018                 sense_data_length = ciss_error_info.sense_data_length;
6019                 if (sense_data_length) {
6020                         if (sense_data_length >
6021                                 sizeof(iocommand.error_info.SenseInfo))
6022                                 sense_data_length =
6023                                         sizeof(iocommand.error_info.SenseInfo);
6024                         memcpy(iocommand.error_info.SenseInfo,
6025                                 pqi_error_info.data, sense_data_length);
6026                         iocommand.error_info.SenseLen = sense_data_length;
6027                 }
6028         }
6029
6030         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
6031                 rc = -EFAULT;
6032                 goto out;
6033         }
6034
6035         if (rc == 0 && iocommand.buf_size > 0 &&
6036                 (iocommand.Request.Type.Direction & XFER_READ)) {
6037                 if (copy_to_user(iocommand.buf, kernel_buffer,
6038                         iocommand.buf_size)) {
6039                         rc = -EFAULT;
6040                 }
6041         }
6042
6043 out:
6044         kfree(kernel_buffer);
6045
6046         return rc;
6047 }
6048
6049 static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd,
6050                      void __user *arg)
6051 {
6052         int rc;
6053         struct pqi_ctrl_info *ctrl_info;
6054
6055         ctrl_info = shost_to_hba(sdev->host);
6056
6057         if (pqi_ctrl_in_ofa(ctrl_info))
6058                 return -EBUSY;
6059
6060         switch (cmd) {
6061         case CCISS_DEREGDISK:
6062         case CCISS_REGNEWDISK:
6063         case CCISS_REGNEWD:
6064                 rc = pqi_scan_scsi_devices(ctrl_info);
6065                 break;
6066         case CCISS_GETPCIINFO:
6067                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
6068                 break;
6069         case CCISS_GETDRIVVER:
6070                 rc = pqi_getdrivver_ioctl(arg);
6071                 break;
6072         case CCISS_PASSTHRU:
6073                 rc = pqi_passthru_ioctl(ctrl_info, arg);
6074                 break;
6075         default:
6076                 rc = -EINVAL;
6077                 break;
6078         }
6079
6080         return rc;
6081 }
6082
6083 static ssize_t pqi_version_show(struct device *dev,
6084         struct device_attribute *attr, char *buffer)
6085 {
6086         ssize_t count = 0;
6087         struct Scsi_Host *shost;
6088         struct pqi_ctrl_info *ctrl_info;
6089
6090         shost = class_to_shost(dev);
6091         ctrl_info = shost_to_hba(shost);
6092
6093         count += snprintf(buffer + count, PAGE_SIZE - count,
6094                 "  driver: %s\n", DRIVER_VERSION BUILD_TIMESTAMP);
6095
6096         count += snprintf(buffer + count, PAGE_SIZE - count,
6097                 "firmware: %s\n", ctrl_info->firmware_version);
6098
6099         return count;
6100 }
6101
6102 static ssize_t pqi_host_rescan_store(struct device *dev,
6103         struct device_attribute *attr, const char *buffer, size_t count)
6104 {
6105         struct Scsi_Host *shost = class_to_shost(dev);
6106
6107         pqi_scan_start(shost);
6108
6109         return count;
6110 }
6111
6112 static ssize_t pqi_lockup_action_show(struct device *dev,
6113         struct device_attribute *attr, char *buffer)
6114 {
6115         int count = 0;
6116         unsigned int i;
6117
6118         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6119                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
6120                         count += snprintf(buffer + count, PAGE_SIZE - count,
6121                                 "[%s] ", pqi_lockup_actions[i].name);
6122                 else
6123                         count += snprintf(buffer + count, PAGE_SIZE - count,
6124                                 "%s ", pqi_lockup_actions[i].name);
6125         }
6126
6127         count += snprintf(buffer + count, PAGE_SIZE - count, "\n");
6128
6129         return count;
6130 }
6131
6132 static ssize_t pqi_lockup_action_store(struct device *dev,
6133         struct device_attribute *attr, const char *buffer, size_t count)
6134 {
6135         unsigned int i;
6136         char *action_name;
6137         char action_name_buffer[32];
6138
6139         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
6140         action_name = strstrip(action_name_buffer);
6141
6142         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6143                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
6144                         pqi_lockup_action = pqi_lockup_actions[i].action;
6145                         return count;
6146                 }
6147         }
6148
6149         return -EINVAL;
6150 }
6151
6152 static DEVICE_ATTR(version, 0444, pqi_version_show, NULL);
6153 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
6154 static DEVICE_ATTR(lockup_action, 0644,
6155         pqi_lockup_action_show, pqi_lockup_action_store);
6156
6157 static struct device_attribute *pqi_shost_attrs[] = {
6158         &dev_attr_version,
6159         &dev_attr_rescan,
6160         &dev_attr_lockup_action,
6161         NULL
6162 };
6163
6164 static ssize_t pqi_unique_id_show(struct device *dev,
6165         struct device_attribute *attr, char *buffer)
6166 {
6167         struct pqi_ctrl_info *ctrl_info;
6168         struct scsi_device *sdev;
6169         struct pqi_scsi_dev *device;
6170         unsigned long flags;
6171         unsigned char uid[16];
6172
6173         sdev = to_scsi_device(dev);
6174         ctrl_info = shost_to_hba(sdev->host);
6175
6176         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6177
6178         device = sdev->hostdata;
6179         if (!device) {
6180                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6181                         flags);
6182                 return -ENODEV;
6183         }
6184         memcpy(uid, device->unique_id, sizeof(uid));
6185
6186         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6187
6188         return snprintf(buffer, PAGE_SIZE,
6189                 "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X\n",
6190                 uid[0], uid[1], uid[2], uid[3],
6191                 uid[4], uid[5], uid[6], uid[7],
6192                 uid[8], uid[9], uid[10], uid[11],
6193                 uid[12], uid[13], uid[14], uid[15]);
6194 }
6195
6196 static ssize_t pqi_lunid_show(struct device *dev,
6197         struct device_attribute *attr, char *buffer)
6198 {
6199         struct pqi_ctrl_info *ctrl_info;
6200         struct scsi_device *sdev;
6201         struct pqi_scsi_dev *device;
6202         unsigned long flags;
6203         u8 lunid[8];
6204
6205         sdev = to_scsi_device(dev);
6206         ctrl_info = shost_to_hba(sdev->host);
6207
6208         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6209
6210         device = sdev->hostdata;
6211         if (!device) {
6212                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6213                         flags);
6214                 return -ENODEV;
6215         }
6216         memcpy(lunid, device->scsi3addr, sizeof(lunid));
6217
6218         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6219
6220         return snprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid);
6221 }
6222
6223 #define MAX_PATHS 8
6224 static ssize_t pqi_path_info_show(struct device *dev,
6225         struct device_attribute *attr, char *buf)
6226 {
6227         struct pqi_ctrl_info *ctrl_info;
6228         struct scsi_device *sdev;
6229         struct pqi_scsi_dev *device;
6230         unsigned long flags;
6231         int i;
6232         int output_len = 0;
6233         u8 box;
6234         u8 bay;
6235         u8 path_map_index = 0;
6236         char *active;
6237         unsigned char phys_connector[2];
6238
6239         sdev = to_scsi_device(dev);
6240         ctrl_info = shost_to_hba(sdev->host);
6241
6242         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6243
6244         device = sdev->hostdata;
6245         if (!device) {
6246                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6247                         flags);
6248                 return -ENODEV;
6249         }
6250
6251         bay = device->bay;
6252         for (i = 0; i < MAX_PATHS; i++) {
6253                 path_map_index = 1<<i;
6254                 if (i == device->active_path_index)
6255                         active = "Active";
6256                 else if (device->path_map & path_map_index)
6257                         active = "Inactive";
6258                 else
6259                         continue;
6260
6261                 output_len += scnprintf(buf + output_len,
6262                                         PAGE_SIZE - output_len,
6263                                         "[%d:%d:%d:%d] %20.20s ",
6264                                         ctrl_info->scsi_host->host_no,
6265                                         device->bus, device->target,
6266                                         device->lun,
6267                                         scsi_device_type(device->devtype));
6268
6269                 if (device->devtype == TYPE_RAID ||
6270                         pqi_is_logical_device(device))
6271                         goto end_buffer;
6272
6273                 memcpy(&phys_connector, &device->phys_connector[i],
6274                         sizeof(phys_connector));
6275                 if (phys_connector[0] < '0')
6276                         phys_connector[0] = '0';
6277                 if (phys_connector[1] < '0')
6278                         phys_connector[1] = '0';
6279
6280                 output_len += scnprintf(buf + output_len,
6281                                         PAGE_SIZE - output_len,
6282                                         "PORT: %.2s ", phys_connector);
6283
6284                 box = device->box[i];
6285                 if (box != 0 && box != 0xFF)
6286                         output_len += scnprintf(buf + output_len,
6287                                                 PAGE_SIZE - output_len,
6288                                                 "BOX: %hhu ", box);
6289
6290                 if ((device->devtype == TYPE_DISK ||
6291                         device->devtype == TYPE_ZBC) &&
6292                         pqi_expose_device(device))
6293                         output_len += scnprintf(buf + output_len,
6294                                                 PAGE_SIZE - output_len,
6295                                                 "BAY: %hhu ", bay);
6296
6297 end_buffer:
6298                 output_len += scnprintf(buf + output_len,
6299                                         PAGE_SIZE - output_len,
6300                                         "%s\n", active);
6301         }
6302
6303         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6304         return output_len;
6305 }
6306
6307
6308 static ssize_t pqi_sas_address_show(struct device *dev,
6309         struct device_attribute *attr, char *buffer)
6310 {
6311         struct pqi_ctrl_info *ctrl_info;
6312         struct scsi_device *sdev;
6313         struct pqi_scsi_dev *device;
6314         unsigned long flags;
6315         u64 sas_address;
6316
6317         sdev = to_scsi_device(dev);
6318         ctrl_info = shost_to_hba(sdev->host);
6319
6320         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6321
6322         device = sdev->hostdata;
6323         if (pqi_is_logical_device(device)) {
6324                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6325                         flags);
6326                 return -ENODEV;
6327         }
6328         sas_address = device->sas_address;
6329
6330         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6331
6332         return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
6333 }
6334
6335 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
6336         struct device_attribute *attr, char *buffer)
6337 {
6338         struct pqi_ctrl_info *ctrl_info;
6339         struct scsi_device *sdev;
6340         struct pqi_scsi_dev *device;
6341         unsigned long flags;
6342
6343         sdev = to_scsi_device(dev);
6344         ctrl_info = shost_to_hba(sdev->host);
6345
6346         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6347
6348         device = sdev->hostdata;
6349         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
6350         buffer[1] = '\n';
6351         buffer[2] = '\0';
6352
6353         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6354
6355         return 2;
6356 }
6357
6358 static ssize_t pqi_raid_level_show(struct device *dev,
6359         struct device_attribute *attr, char *buffer)
6360 {
6361         struct pqi_ctrl_info *ctrl_info;
6362         struct scsi_device *sdev;
6363         struct pqi_scsi_dev *device;
6364         unsigned long flags;
6365         char *raid_level;
6366
6367         sdev = to_scsi_device(dev);
6368         ctrl_info = shost_to_hba(sdev->host);
6369
6370         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6371
6372         device = sdev->hostdata;
6373
6374         if (pqi_is_logical_device(device))
6375                 raid_level = pqi_raid_level_to_string(device->raid_level);
6376         else
6377                 raid_level = "N/A";
6378
6379         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6380
6381         return snprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
6382 }
6383
6384 static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL);
6385 static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL);
6386 static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL);
6387 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
6388 static DEVICE_ATTR(ssd_smart_path_enabled, 0444,
6389         pqi_ssd_smart_path_enabled_show, NULL);
6390 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
6391
6392 static struct device_attribute *pqi_sdev_attrs[] = {
6393         &dev_attr_lunid,
6394         &dev_attr_unique_id,
6395         &dev_attr_path_info,
6396         &dev_attr_sas_address,
6397         &dev_attr_ssd_smart_path_enabled,
6398         &dev_attr_raid_level,
6399         NULL
6400 };
6401
6402 static struct scsi_host_template pqi_driver_template = {
6403         .module = THIS_MODULE,
6404         .name = DRIVER_NAME_SHORT,
6405         .proc_name = DRIVER_NAME_SHORT,
6406         .queuecommand = pqi_scsi_queue_command,
6407         .scan_start = pqi_scan_start,
6408         .scan_finished = pqi_scan_finished,
6409         .this_id = -1,
6410         .eh_device_reset_handler = pqi_eh_device_reset_handler,
6411         .ioctl = pqi_ioctl,
6412         .slave_alloc = pqi_slave_alloc,
6413         .map_queues = pqi_map_queues,
6414         .sdev_attrs = pqi_sdev_attrs,
6415         .shost_attrs = pqi_shost_attrs,
6416 };
6417
6418 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
6419 {
6420         int rc;
6421         struct Scsi_Host *shost;
6422
6423         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
6424         if (!shost) {
6425                 dev_err(&ctrl_info->pci_dev->dev,
6426                         "scsi_host_alloc failed for controller %u\n",
6427                         ctrl_info->ctrl_id);
6428                 return -ENOMEM;
6429         }
6430
6431         shost->io_port = 0;
6432         shost->n_io_port = 0;
6433         shost->this_id = -1;
6434         shost->max_channel = PQI_MAX_BUS;
6435         shost->max_cmd_len = MAX_COMMAND_SIZE;
6436         shost->max_lun = ~0;
6437         shost->max_id = ~0;
6438         shost->max_sectors = ctrl_info->max_sectors;
6439         shost->can_queue = ctrl_info->scsi_ml_can_queue;
6440         shost->cmd_per_lun = shost->can_queue;
6441         shost->sg_tablesize = ctrl_info->sg_tablesize;
6442         shost->transportt = pqi_sas_transport_template;
6443         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
6444         shost->unique_id = shost->irq;
6445         shost->nr_hw_queues = ctrl_info->num_queue_groups;
6446         shost->hostdata[0] = (unsigned long)ctrl_info;
6447
6448         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
6449         if (rc) {
6450                 dev_err(&ctrl_info->pci_dev->dev,
6451                         "scsi_add_host failed for controller %u\n",
6452                         ctrl_info->ctrl_id);
6453                 goto free_host;
6454         }
6455
6456         rc = pqi_add_sas_host(shost, ctrl_info);
6457         if (rc) {
6458                 dev_err(&ctrl_info->pci_dev->dev,
6459                         "add SAS host failed for controller %u\n",
6460                         ctrl_info->ctrl_id);
6461                 goto remove_host;
6462         }
6463
6464         ctrl_info->scsi_host = shost;
6465
6466         return 0;
6467
6468 remove_host:
6469         scsi_remove_host(shost);
6470 free_host:
6471         scsi_host_put(shost);
6472
6473         return rc;
6474 }
6475
6476 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
6477 {
6478         struct Scsi_Host *shost;
6479
6480         pqi_delete_sas_host(ctrl_info);
6481
6482         shost = ctrl_info->scsi_host;
6483         if (!shost)
6484                 return;
6485
6486         scsi_remove_host(shost);
6487         scsi_host_put(shost);
6488 }
6489
6490 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
6491 {
6492         int rc = 0;
6493         struct pqi_device_registers __iomem *pqi_registers;
6494         unsigned long timeout;
6495         unsigned int timeout_msecs;
6496         union pqi_reset_register reset_reg;
6497
6498         pqi_registers = ctrl_info->pqi_registers;
6499         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
6500         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
6501
6502         while (1) {
6503                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
6504                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
6505                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
6506                         break;
6507                 pqi_check_ctrl_health(ctrl_info);
6508                 if (pqi_ctrl_offline(ctrl_info)) {
6509                         rc = -ENXIO;
6510                         break;
6511                 }
6512                 if (time_after(jiffies, timeout)) {
6513                         rc = -ETIMEDOUT;
6514                         break;
6515                 }
6516         }
6517
6518         return rc;
6519 }
6520
6521 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
6522 {
6523         int rc;
6524         union pqi_reset_register reset_reg;
6525
6526         if (ctrl_info->pqi_reset_quiesce_supported) {
6527                 rc = sis_pqi_reset_quiesce(ctrl_info);
6528                 if (rc) {
6529                         dev_err(&ctrl_info->pci_dev->dev,
6530                                 "PQI reset failed during quiesce with error %d\n",
6531                                 rc);
6532                         return rc;
6533                 }
6534         }
6535
6536         reset_reg.all_bits = 0;
6537         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
6538         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
6539
6540         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
6541
6542         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
6543         if (rc)
6544                 dev_err(&ctrl_info->pci_dev->dev,
6545                         "PQI reset failed with error %d\n", rc);
6546
6547         return rc;
6548 }
6549
6550 static int pqi_get_ctrl_firmware_version(struct pqi_ctrl_info *ctrl_info)
6551 {
6552         int rc;
6553         struct bmic_identify_controller *identify;
6554
6555         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
6556         if (!identify)
6557                 return -ENOMEM;
6558
6559         rc = pqi_identify_controller(ctrl_info, identify);
6560         if (rc)
6561                 goto out;
6562
6563         memcpy(ctrl_info->firmware_version, identify->firmware_version,
6564                 sizeof(identify->firmware_version));
6565         ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
6566         snprintf(ctrl_info->firmware_version +
6567                 strlen(ctrl_info->firmware_version),
6568                 sizeof(ctrl_info->firmware_version),
6569                 "-%u", get_unaligned_le16(&identify->firmware_build_number));
6570
6571 out:
6572         kfree(identify);
6573
6574         return rc;
6575 }
6576
6577 struct pqi_config_table_section_info {
6578         struct pqi_ctrl_info *ctrl_info;
6579         void            *section;
6580         u32             section_offset;
6581         void __iomem    *section_iomem_addr;
6582 };
6583
6584 static inline bool pqi_is_firmware_feature_supported(
6585         struct pqi_config_table_firmware_features *firmware_features,
6586         unsigned int bit_position)
6587 {
6588         unsigned int byte_index;
6589
6590         byte_index = bit_position / BITS_PER_BYTE;
6591
6592         if (byte_index >= le16_to_cpu(firmware_features->num_elements))
6593                 return false;
6594
6595         return firmware_features->features_supported[byte_index] &
6596                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
6597 }
6598
6599 static inline bool pqi_is_firmware_feature_enabled(
6600         struct pqi_config_table_firmware_features *firmware_features,
6601         void __iomem *firmware_features_iomem_addr,
6602         unsigned int bit_position)
6603 {
6604         unsigned int byte_index;
6605         u8 __iomem *features_enabled_iomem_addr;
6606
6607         byte_index = (bit_position / BITS_PER_BYTE) +
6608                 (le16_to_cpu(firmware_features->num_elements) * 2);
6609
6610         features_enabled_iomem_addr = firmware_features_iomem_addr +
6611                 offsetof(struct pqi_config_table_firmware_features,
6612                         features_supported) + byte_index;
6613
6614         return *((__force u8 *)features_enabled_iomem_addr) &
6615                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
6616 }
6617
6618 static inline void pqi_request_firmware_feature(
6619         struct pqi_config_table_firmware_features *firmware_features,
6620         unsigned int bit_position)
6621 {
6622         unsigned int byte_index;
6623
6624         byte_index = (bit_position / BITS_PER_BYTE) +
6625                 le16_to_cpu(firmware_features->num_elements);
6626
6627         firmware_features->features_supported[byte_index] |=
6628                 (1 << (bit_position % BITS_PER_BYTE));
6629 }
6630
6631 static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info,
6632         u16 first_section, u16 last_section)
6633 {
6634         struct pqi_vendor_general_request request;
6635
6636         memset(&request, 0, sizeof(request));
6637
6638         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
6639         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
6640                 &request.header.iu_length);
6641         put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE,
6642                 &request.function_code);
6643         put_unaligned_le16(first_section,
6644                 &request.data.config_table_update.first_section);
6645         put_unaligned_le16(last_section,
6646                 &request.data.config_table_update.last_section);
6647
6648         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6649                 0, NULL, NO_TIMEOUT);
6650 }
6651
6652 static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
6653         struct pqi_config_table_firmware_features *firmware_features,
6654         void __iomem *firmware_features_iomem_addr)
6655 {
6656         void *features_requested;
6657         void __iomem *features_requested_iomem_addr;
6658
6659         features_requested = firmware_features->features_supported +
6660                 le16_to_cpu(firmware_features->num_elements);
6661
6662         features_requested_iomem_addr = firmware_features_iomem_addr +
6663                 (features_requested - (void *)firmware_features);
6664
6665         memcpy_toio(features_requested_iomem_addr, features_requested,
6666                 le16_to_cpu(firmware_features->num_elements));
6667
6668         return pqi_config_table_update(ctrl_info,
6669                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES,
6670                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES);
6671 }
6672
6673 struct pqi_firmware_feature {
6674         char            *feature_name;
6675         unsigned int    feature_bit;
6676         bool            supported;
6677         bool            enabled;
6678         void (*feature_status)(struct pqi_ctrl_info *ctrl_info,
6679                 struct pqi_firmware_feature *firmware_feature);
6680 };
6681
6682 static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info,
6683         struct pqi_firmware_feature *firmware_feature)
6684 {
6685         if (!firmware_feature->supported) {
6686                 dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n",
6687                         firmware_feature->feature_name);
6688                 return;
6689         }
6690
6691         if (firmware_feature->enabled) {
6692                 dev_info(&ctrl_info->pci_dev->dev,
6693                         "%s enabled\n", firmware_feature->feature_name);
6694                 return;
6695         }
6696
6697         dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n",
6698                 firmware_feature->feature_name);
6699 }
6700
6701 static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info,
6702         struct pqi_firmware_feature *firmware_feature)
6703 {
6704         if (firmware_feature->feature_status)
6705                 firmware_feature->feature_status(ctrl_info, firmware_feature);
6706 }
6707
6708 static DEFINE_MUTEX(pqi_firmware_features_mutex);
6709
6710 static struct pqi_firmware_feature pqi_firmware_features[] = {
6711         {
6712                 .feature_name = "Online Firmware Activation",
6713                 .feature_bit = PQI_FIRMWARE_FEATURE_OFA,
6714                 .feature_status = pqi_firmware_feature_status,
6715         },
6716         {
6717                 .feature_name = "Serial Management Protocol",
6718                 .feature_bit = PQI_FIRMWARE_FEATURE_SMP,
6719                 .feature_status = pqi_firmware_feature_status,
6720         },
6721         {
6722                 .feature_name = "New Soft Reset Handshake",
6723                 .feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE,
6724                 .feature_status = pqi_firmware_feature_status,
6725         },
6726 };
6727
6728 static void pqi_process_firmware_features(
6729         struct pqi_config_table_section_info *section_info)
6730 {
6731         int rc;
6732         struct pqi_ctrl_info *ctrl_info;
6733         struct pqi_config_table_firmware_features *firmware_features;
6734         void __iomem *firmware_features_iomem_addr;
6735         unsigned int i;
6736         unsigned int num_features_supported;
6737
6738         ctrl_info = section_info->ctrl_info;
6739         firmware_features = section_info->section;
6740         firmware_features_iomem_addr = section_info->section_iomem_addr;
6741
6742         for (i = 0, num_features_supported = 0;
6743                 i < ARRAY_SIZE(pqi_firmware_features); i++) {
6744                 if (pqi_is_firmware_feature_supported(firmware_features,
6745                         pqi_firmware_features[i].feature_bit)) {
6746                         pqi_firmware_features[i].supported = true;
6747                         num_features_supported++;
6748                 } else {
6749                         pqi_firmware_feature_update(ctrl_info,
6750                                 &pqi_firmware_features[i]);
6751                 }
6752         }
6753
6754         if (num_features_supported == 0)
6755                 return;
6756
6757         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6758                 if (!pqi_firmware_features[i].supported)
6759                         continue;
6760                 pqi_request_firmware_feature(firmware_features,
6761                         pqi_firmware_features[i].feature_bit);
6762         }
6763
6764         rc = pqi_enable_firmware_features(ctrl_info, firmware_features,
6765                 firmware_features_iomem_addr);
6766         if (rc) {
6767                 dev_err(&ctrl_info->pci_dev->dev,
6768                         "failed to enable firmware features in PQI configuration table\n");
6769                 for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6770                         if (!pqi_firmware_features[i].supported)
6771                                 continue;
6772                         pqi_firmware_feature_update(ctrl_info,
6773                                 &pqi_firmware_features[i]);
6774                 }
6775                 return;
6776         }
6777
6778         ctrl_info->soft_reset_handshake_supported = false;
6779         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6780                 if (!pqi_firmware_features[i].supported)
6781                         continue;
6782                 if (pqi_is_firmware_feature_enabled(firmware_features,
6783                         firmware_features_iomem_addr,
6784                         pqi_firmware_features[i].feature_bit)) {
6785                         pqi_firmware_features[i].enabled = true;
6786                         if (pqi_firmware_features[i].feature_bit ==
6787                             PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE)
6788                                 ctrl_info->soft_reset_handshake_supported =
6789                                                                         true;
6790                 }
6791                 pqi_firmware_feature_update(ctrl_info,
6792                         &pqi_firmware_features[i]);
6793         }
6794 }
6795
6796 static void pqi_init_firmware_features(void)
6797 {
6798         unsigned int i;
6799
6800         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6801                 pqi_firmware_features[i].supported = false;
6802                 pqi_firmware_features[i].enabled = false;
6803         }
6804 }
6805
6806 static void pqi_process_firmware_features_section(
6807         struct pqi_config_table_section_info *section_info)
6808 {
6809         mutex_lock(&pqi_firmware_features_mutex);
6810         pqi_init_firmware_features();
6811         pqi_process_firmware_features(section_info);
6812         mutex_unlock(&pqi_firmware_features_mutex);
6813 }
6814
6815 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
6816 {
6817         u32 table_length;
6818         u32 section_offset;
6819         void __iomem *table_iomem_addr;
6820         struct pqi_config_table *config_table;
6821         struct pqi_config_table_section_header *section;
6822         struct pqi_config_table_section_info section_info;
6823
6824         table_length = ctrl_info->config_table_length;
6825         if (table_length == 0)
6826                 return 0;
6827
6828         config_table = kmalloc(table_length, GFP_KERNEL);
6829         if (!config_table) {
6830                 dev_err(&ctrl_info->pci_dev->dev,
6831                         "failed to allocate memory for PQI configuration table\n");
6832                 return -ENOMEM;
6833         }
6834
6835         /*
6836          * Copy the config table contents from I/O memory space into the
6837          * temporary buffer.
6838          */
6839         table_iomem_addr = ctrl_info->iomem_base +
6840                 ctrl_info->config_table_offset;
6841         memcpy_fromio(config_table, table_iomem_addr, table_length);
6842
6843         section_info.ctrl_info = ctrl_info;
6844         section_offset =
6845                 get_unaligned_le32(&config_table->first_section_offset);
6846
6847         while (section_offset) {
6848                 section = (void *)config_table + section_offset;
6849
6850                 section_info.section = section;
6851                 section_info.section_offset = section_offset;
6852                 section_info.section_iomem_addr =
6853                         table_iomem_addr + section_offset;
6854
6855                 switch (get_unaligned_le16(&section->section_id)) {
6856                 case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES:
6857                         pqi_process_firmware_features_section(&section_info);
6858                         break;
6859                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
6860                         if (pqi_disable_heartbeat)
6861                                 dev_warn(&ctrl_info->pci_dev->dev,
6862                                 "heartbeat disabled by module parameter\n");
6863                         else
6864                                 ctrl_info->heartbeat_counter =
6865                                         table_iomem_addr +
6866                                         section_offset +
6867                                         offsetof(
6868                                         struct pqi_config_table_heartbeat,
6869                                                 heartbeat_counter);
6870                         break;
6871                 case PQI_CONFIG_TABLE_SECTION_SOFT_RESET:
6872                         ctrl_info->soft_reset_status =
6873                                 table_iomem_addr +
6874                                 section_offset +
6875                                 offsetof(struct pqi_config_table_soft_reset,
6876                                                 soft_reset_status);
6877                         break;
6878                 }
6879
6880                 section_offset =
6881                         get_unaligned_le16(&section->next_section_offset);
6882         }
6883
6884         kfree(config_table);
6885
6886         return 0;
6887 }
6888
6889 /* Switches the controller from PQI mode back into SIS mode. */
6890
6891 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
6892 {
6893         int rc;
6894
6895         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
6896         rc = pqi_reset(ctrl_info);
6897         if (rc)
6898                 return rc;
6899         rc = sis_reenable_sis_mode(ctrl_info);
6900         if (rc) {
6901                 dev_err(&ctrl_info->pci_dev->dev,
6902                         "re-enabling SIS mode failed with error %d\n", rc);
6903                 return rc;
6904         }
6905         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6906
6907         return 0;
6908 }
6909
6910 /*
6911  * If the controller isn't already in SIS mode, this function forces it into
6912  * SIS mode.
6913  */
6914
6915 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
6916 {
6917         if (!sis_is_firmware_running(ctrl_info))
6918                 return -ENXIO;
6919
6920         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
6921                 return 0;
6922
6923         if (sis_is_kernel_up(ctrl_info)) {
6924                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6925                 return 0;
6926         }
6927
6928         return pqi_revert_to_sis_mode(ctrl_info);
6929 }
6930
6931 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
6932 {
6933         int rc;
6934
6935         rc = pqi_force_sis_mode(ctrl_info);
6936         if (rc)
6937                 return rc;
6938
6939         /*
6940          * Wait until the controller is ready to start accepting SIS
6941          * commands.
6942          */
6943         rc = sis_wait_for_ctrl_ready(ctrl_info);
6944         if (rc)
6945                 return rc;
6946
6947         /*
6948          * Get the controller properties.  This allows us to determine
6949          * whether or not it supports PQI mode.
6950          */
6951         rc = sis_get_ctrl_properties(ctrl_info);
6952         if (rc) {
6953                 dev_err(&ctrl_info->pci_dev->dev,
6954                         "error obtaining controller properties\n");
6955                 return rc;
6956         }
6957
6958         rc = sis_get_pqi_capabilities(ctrl_info);
6959         if (rc) {
6960                 dev_err(&ctrl_info->pci_dev->dev,
6961                         "error obtaining controller capabilities\n");
6962                 return rc;
6963         }
6964
6965         if (reset_devices) {
6966                 if (ctrl_info->max_outstanding_requests >
6967                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
6968                         ctrl_info->max_outstanding_requests =
6969                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
6970         } else {
6971                 if (ctrl_info->max_outstanding_requests >
6972                         PQI_MAX_OUTSTANDING_REQUESTS)
6973                         ctrl_info->max_outstanding_requests =
6974                                         PQI_MAX_OUTSTANDING_REQUESTS;
6975         }
6976
6977         pqi_calculate_io_resources(ctrl_info);
6978
6979         rc = pqi_alloc_error_buffer(ctrl_info);
6980         if (rc) {
6981                 dev_err(&ctrl_info->pci_dev->dev,
6982                         "failed to allocate PQI error buffer\n");
6983                 return rc;
6984         }
6985
6986         /*
6987          * If the function we are about to call succeeds, the
6988          * controller will transition from legacy SIS mode
6989          * into PQI mode.
6990          */
6991         rc = sis_init_base_struct_addr(ctrl_info);
6992         if (rc) {
6993                 dev_err(&ctrl_info->pci_dev->dev,
6994                         "error initializing PQI mode\n");
6995                 return rc;
6996         }
6997
6998         /* Wait for the controller to complete the SIS -> PQI transition. */
6999         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
7000         if (rc) {
7001                 dev_err(&ctrl_info->pci_dev->dev,
7002                         "transition to PQI mode failed\n");
7003                 return rc;
7004         }
7005
7006         /* From here on, we are running in PQI mode. */
7007         ctrl_info->pqi_mode_enabled = true;
7008         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7009
7010         rc = pqi_alloc_admin_queues(ctrl_info);
7011         if (rc) {
7012                 dev_err(&ctrl_info->pci_dev->dev,
7013                         "failed to allocate admin queues\n");
7014                 return rc;
7015         }
7016
7017         rc = pqi_create_admin_queues(ctrl_info);
7018         if (rc) {
7019                 dev_err(&ctrl_info->pci_dev->dev,
7020                         "error creating admin queues\n");
7021                 return rc;
7022         }
7023
7024         rc = pqi_report_device_capability(ctrl_info);
7025         if (rc) {
7026                 dev_err(&ctrl_info->pci_dev->dev,
7027                         "obtaining device capability failed\n");
7028                 return rc;
7029         }
7030
7031         rc = pqi_validate_device_capability(ctrl_info);
7032         if (rc)
7033                 return rc;
7034
7035         pqi_calculate_queue_resources(ctrl_info);
7036
7037         rc = pqi_enable_msix_interrupts(ctrl_info);
7038         if (rc)
7039                 return rc;
7040
7041         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
7042                 ctrl_info->max_msix_vectors =
7043                         ctrl_info->num_msix_vectors_enabled;
7044                 pqi_calculate_queue_resources(ctrl_info);
7045         }
7046
7047         rc = pqi_alloc_io_resources(ctrl_info);
7048         if (rc)
7049                 return rc;
7050
7051         rc = pqi_alloc_operational_queues(ctrl_info);
7052         if (rc) {
7053                 dev_err(&ctrl_info->pci_dev->dev,
7054                         "failed to allocate operational queues\n");
7055                 return rc;
7056         }
7057
7058         pqi_init_operational_queues(ctrl_info);
7059
7060         rc = pqi_request_irqs(ctrl_info);
7061         if (rc)
7062                 return rc;
7063
7064         rc = pqi_create_queues(ctrl_info);
7065         if (rc)
7066                 return rc;
7067
7068         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
7069
7070         ctrl_info->controller_online = true;
7071
7072         rc = pqi_process_config_table(ctrl_info);
7073         if (rc)
7074                 return rc;
7075
7076         pqi_start_heartbeat_timer(ctrl_info);
7077
7078         rc = pqi_enable_events(ctrl_info);
7079         if (rc) {
7080                 dev_err(&ctrl_info->pci_dev->dev,
7081                         "error enabling events\n");
7082                 return rc;
7083         }
7084
7085         /* Register with the SCSI subsystem. */
7086         rc = pqi_register_scsi(ctrl_info);
7087         if (rc)
7088                 return rc;
7089
7090         rc = pqi_get_ctrl_firmware_version(ctrl_info);
7091         if (rc) {
7092                 dev_err(&ctrl_info->pci_dev->dev,
7093                         "error obtaining firmware version\n");
7094                 return rc;
7095         }
7096
7097         rc = pqi_set_diag_rescan(ctrl_info);
7098         if (rc) {
7099                 dev_err(&ctrl_info->pci_dev->dev,
7100                         "error enabling multi-lun rescan\n");
7101                 return rc;
7102         }
7103
7104         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
7105         if (rc) {
7106                 dev_err(&ctrl_info->pci_dev->dev,
7107                         "error updating host wellness\n");
7108                 return rc;
7109         }
7110
7111         pqi_schedule_update_time_worker(ctrl_info);
7112
7113         pqi_scan_scsi_devices(ctrl_info);
7114
7115         return 0;
7116 }
7117
7118 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
7119 {
7120         unsigned int i;
7121         struct pqi_admin_queues *admin_queues;
7122         struct pqi_event_queue *event_queue;
7123
7124         admin_queues = &ctrl_info->admin_queues;
7125         admin_queues->iq_pi_copy = 0;
7126         admin_queues->oq_ci_copy = 0;
7127         writel(0, admin_queues->oq_pi);
7128
7129         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
7130                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
7131                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
7132                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
7133
7134                 writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]);
7135                 writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]);
7136                 writel(0, ctrl_info->queue_groups[i].oq_pi);
7137         }
7138
7139         event_queue = &ctrl_info->event_queue;
7140         writel(0, event_queue->oq_pi);
7141         event_queue->oq_ci_copy = 0;
7142 }
7143
7144 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
7145 {
7146         int rc;
7147
7148         rc = pqi_force_sis_mode(ctrl_info);
7149         if (rc)
7150                 return rc;
7151
7152         /*
7153          * Wait until the controller is ready to start accepting SIS
7154          * commands.
7155          */
7156         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
7157         if (rc)
7158                 return rc;
7159
7160         /*
7161          * Get the controller properties.  This allows us to determine
7162          * whether or not it supports PQI mode.
7163          */
7164         rc = sis_get_ctrl_properties(ctrl_info);
7165         if (rc) {
7166                 dev_err(&ctrl_info->pci_dev->dev,
7167                         "error obtaining controller properties\n");
7168                 return rc;
7169         }
7170
7171         rc = sis_get_pqi_capabilities(ctrl_info);
7172         if (rc) {
7173                 dev_err(&ctrl_info->pci_dev->dev,
7174                         "error obtaining controller capabilities\n");
7175                 return rc;
7176         }
7177
7178         /*
7179          * If the function we are about to call succeeds, the
7180          * controller will transition from legacy SIS mode
7181          * into PQI mode.
7182          */
7183         rc = sis_init_base_struct_addr(ctrl_info);
7184         if (rc) {
7185                 dev_err(&ctrl_info->pci_dev->dev,
7186                         "error initializing PQI mode\n");
7187                 return rc;
7188         }
7189
7190         /* Wait for the controller to complete the SIS -> PQI transition. */
7191         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
7192         if (rc) {
7193                 dev_err(&ctrl_info->pci_dev->dev,
7194                         "transition to PQI mode failed\n");
7195                 return rc;
7196         }
7197
7198         /* From here on, we are running in PQI mode. */
7199         ctrl_info->pqi_mode_enabled = true;
7200         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7201
7202         pqi_reinit_queues(ctrl_info);
7203
7204         rc = pqi_create_admin_queues(ctrl_info);
7205         if (rc) {
7206                 dev_err(&ctrl_info->pci_dev->dev,
7207                         "error creating admin queues\n");
7208                 return rc;
7209         }
7210
7211         rc = pqi_create_queues(ctrl_info);
7212         if (rc)
7213                 return rc;
7214
7215         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
7216
7217         ctrl_info->controller_online = true;
7218         pqi_ctrl_unblock_requests(ctrl_info);
7219
7220         rc = pqi_process_config_table(ctrl_info);
7221         if (rc)
7222                 return rc;
7223
7224         pqi_start_heartbeat_timer(ctrl_info);
7225
7226         rc = pqi_enable_events(ctrl_info);
7227         if (rc) {
7228                 dev_err(&ctrl_info->pci_dev->dev,
7229                         "error enabling events\n");
7230                 return rc;
7231         }
7232
7233         rc = pqi_get_ctrl_firmware_version(ctrl_info);
7234         if (rc) {
7235                 dev_err(&ctrl_info->pci_dev->dev,
7236                         "error obtaining firmware version\n");
7237                 return rc;
7238         }
7239
7240         rc = pqi_set_diag_rescan(ctrl_info);
7241         if (rc) {
7242                 dev_err(&ctrl_info->pci_dev->dev,
7243                         "error enabling multi-lun rescan\n");
7244                 return rc;
7245         }
7246
7247         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
7248         if (rc) {
7249                 dev_err(&ctrl_info->pci_dev->dev,
7250                         "error updating host wellness\n");
7251                 return rc;
7252         }
7253
7254         pqi_schedule_update_time_worker(ctrl_info);
7255
7256         pqi_scan_scsi_devices(ctrl_info);
7257
7258         return 0;
7259 }
7260
7261 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev,
7262         u16 timeout)
7263 {
7264         return pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
7265                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
7266 }
7267
7268 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
7269 {
7270         int rc;
7271         u64 mask;
7272
7273         rc = pci_enable_device(ctrl_info->pci_dev);
7274         if (rc) {
7275                 dev_err(&ctrl_info->pci_dev->dev,
7276                         "failed to enable PCI device\n");
7277                 return rc;
7278         }
7279
7280         if (sizeof(dma_addr_t) > 4)
7281                 mask = DMA_BIT_MASK(64);
7282         else
7283                 mask = DMA_BIT_MASK(32);
7284
7285         rc = dma_set_mask(&ctrl_info->pci_dev->dev, mask);
7286         if (rc) {
7287                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
7288                 goto disable_device;
7289         }
7290
7291         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
7292         if (rc) {
7293                 dev_err(&ctrl_info->pci_dev->dev,
7294                         "failed to obtain PCI resources\n");
7295                 goto disable_device;
7296         }
7297
7298         ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
7299                 ctrl_info->pci_dev, 0),
7300                 sizeof(struct pqi_ctrl_registers));
7301         if (!ctrl_info->iomem_base) {
7302                 dev_err(&ctrl_info->pci_dev->dev,
7303                         "failed to map memory for controller registers\n");
7304                 rc = -ENOMEM;
7305                 goto release_regions;
7306         }
7307
7308 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
7309
7310         /* Increase the PCIe completion timeout. */
7311         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
7312                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
7313         if (rc) {
7314                 dev_err(&ctrl_info->pci_dev->dev,
7315                         "failed to set PCIe completion timeout\n");
7316                 goto release_regions;
7317         }
7318
7319         /* Enable bus mastering. */
7320         pci_set_master(ctrl_info->pci_dev);
7321
7322         ctrl_info->registers = ctrl_info->iomem_base;
7323         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
7324
7325         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
7326
7327         return 0;
7328
7329 release_regions:
7330         pci_release_regions(ctrl_info->pci_dev);
7331 disable_device:
7332         pci_disable_device(ctrl_info->pci_dev);
7333
7334         return rc;
7335 }
7336
7337 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
7338 {
7339         iounmap(ctrl_info->iomem_base);
7340         pci_release_regions(ctrl_info->pci_dev);
7341         if (pci_is_enabled(ctrl_info->pci_dev))
7342                 pci_disable_device(ctrl_info->pci_dev);
7343         pci_set_drvdata(ctrl_info->pci_dev, NULL);
7344 }
7345
7346 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
7347 {
7348         struct pqi_ctrl_info *ctrl_info;
7349
7350         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
7351                         GFP_KERNEL, numa_node);
7352         if (!ctrl_info)
7353                 return NULL;
7354
7355         mutex_init(&ctrl_info->scan_mutex);
7356         mutex_init(&ctrl_info->lun_reset_mutex);
7357         mutex_init(&ctrl_info->ofa_mutex);
7358
7359         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
7360         spin_lock_init(&ctrl_info->scsi_device_list_lock);
7361
7362         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
7363         atomic_set(&ctrl_info->num_interrupts, 0);
7364
7365         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
7366         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
7367
7368         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
7369         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
7370
7371         sema_init(&ctrl_info->sync_request_sem,
7372                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
7373         init_waitqueue_head(&ctrl_info->block_requests_wait);
7374
7375         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
7376         spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock);
7377         INIT_WORK(&ctrl_info->raid_bypass_retry_work,
7378                 pqi_raid_bypass_retry_worker);
7379
7380         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
7381         ctrl_info->irq_mode = IRQ_MODE_NONE;
7382         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
7383
7384         return ctrl_info;
7385 }
7386
7387 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
7388 {
7389         kfree(ctrl_info);
7390 }
7391
7392 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
7393 {
7394         pqi_free_irqs(ctrl_info);
7395         pqi_disable_msix_interrupts(ctrl_info);
7396 }
7397
7398 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
7399 {
7400         pqi_stop_heartbeat_timer(ctrl_info);
7401         pqi_free_interrupts(ctrl_info);
7402         if (ctrl_info->queue_memory_base)
7403                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7404                         ctrl_info->queue_memory_length,
7405                         ctrl_info->queue_memory_base,
7406                         ctrl_info->queue_memory_base_dma_handle);
7407         if (ctrl_info->admin_queue_memory_base)
7408                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7409                         ctrl_info->admin_queue_memory_length,
7410                         ctrl_info->admin_queue_memory_base,
7411                         ctrl_info->admin_queue_memory_base_dma_handle);
7412         pqi_free_all_io_requests(ctrl_info);
7413         if (ctrl_info->error_buffer)
7414                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7415                         ctrl_info->error_buffer_length,
7416                         ctrl_info->error_buffer,
7417                         ctrl_info->error_buffer_dma_handle);
7418         if (ctrl_info->iomem_base)
7419                 pqi_cleanup_pci_init(ctrl_info);
7420         pqi_free_ctrl_info(ctrl_info);
7421 }
7422
7423 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
7424 {
7425         pqi_cancel_rescan_worker(ctrl_info);
7426         pqi_cancel_update_time_worker(ctrl_info);
7427         pqi_remove_all_scsi_devices(ctrl_info);
7428         pqi_unregister_scsi(ctrl_info);
7429         if (ctrl_info->pqi_mode_enabled)
7430                 pqi_revert_to_sis_mode(ctrl_info);
7431         pqi_free_ctrl_resources(ctrl_info);
7432 }
7433
7434 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info)
7435 {
7436         pqi_cancel_update_time_worker(ctrl_info);
7437         pqi_cancel_rescan_worker(ctrl_info);
7438         pqi_wait_until_lun_reset_finished(ctrl_info);
7439         pqi_wait_until_scan_finished(ctrl_info);
7440         pqi_ctrl_ofa_start(ctrl_info);
7441         pqi_ctrl_block_requests(ctrl_info);
7442         pqi_ctrl_wait_until_quiesced(ctrl_info);
7443         pqi_ctrl_wait_for_pending_io(ctrl_info, PQI_PENDING_IO_TIMEOUT_SECS);
7444         pqi_fail_io_queued_for_all_devices(ctrl_info);
7445         pqi_wait_until_inbound_queues_empty(ctrl_info);
7446         pqi_stop_heartbeat_timer(ctrl_info);
7447         ctrl_info->pqi_mode_enabled = false;
7448         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7449 }
7450
7451 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info)
7452 {
7453         pqi_ofa_free_host_buffer(ctrl_info);
7454         ctrl_info->pqi_mode_enabled = true;
7455         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7456         ctrl_info->controller_online = true;
7457         pqi_ctrl_unblock_requests(ctrl_info);
7458         pqi_start_heartbeat_timer(ctrl_info);
7459         pqi_schedule_update_time_worker(ctrl_info);
7460         pqi_clear_soft_reset_status(ctrl_info,
7461                 PQI_SOFT_RESET_ABORT);
7462         pqi_scan_scsi_devices(ctrl_info);
7463 }
7464
7465 static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info,
7466         u32 total_size, u32 chunk_size)
7467 {
7468         u32 sg_count;
7469         u32 size;
7470         int i;
7471         struct pqi_sg_descriptor *mem_descriptor = NULL;
7472         struct device *dev;
7473         struct pqi_ofa_memory *ofap;
7474
7475         dev = &ctrl_info->pci_dev->dev;
7476
7477         sg_count = (total_size + chunk_size - 1);
7478         sg_count /= chunk_size;
7479
7480         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7481
7482         if (sg_count*chunk_size < total_size)
7483                 goto out;
7484
7485         ctrl_info->pqi_ofa_chunk_virt_addr =
7486                                 kcalloc(sg_count, sizeof(void *), GFP_KERNEL);
7487         if (!ctrl_info->pqi_ofa_chunk_virt_addr)
7488                 goto out;
7489
7490         for (size = 0, i = 0; size < total_size; size += chunk_size, i++) {
7491                 dma_addr_t dma_handle;
7492
7493                 ctrl_info->pqi_ofa_chunk_virt_addr[i] =
7494                         dma_alloc_coherent(dev, chunk_size, &dma_handle,
7495                                            GFP_KERNEL);
7496
7497                 if (!ctrl_info->pqi_ofa_chunk_virt_addr[i])
7498                         break;
7499
7500                 mem_descriptor = &ofap->sg_descriptor[i];
7501                 put_unaligned_le64 ((u64) dma_handle, &mem_descriptor->address);
7502                 put_unaligned_le32 (chunk_size, &mem_descriptor->length);
7503         }
7504
7505         if (!size || size < total_size)
7506                 goto out_free_chunks;
7507
7508         put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags);
7509         put_unaligned_le16(sg_count, &ofap->num_memory_descriptors);
7510         put_unaligned_le32(size, &ofap->bytes_allocated);
7511
7512         return 0;
7513
7514 out_free_chunks:
7515         while (--i >= 0) {
7516                 mem_descriptor = &ofap->sg_descriptor[i];
7517                 dma_free_coherent(dev, chunk_size,
7518                                 ctrl_info->pqi_ofa_chunk_virt_addr[i],
7519                                 get_unaligned_le64(&mem_descriptor->address));
7520         }
7521         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
7522
7523 out:
7524         put_unaligned_le32 (0, &ofap->bytes_allocated);
7525         return -ENOMEM;
7526 }
7527
7528 static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info)
7529 {
7530         u32 total_size;
7531         u32 min_chunk_size;
7532         u32 chunk_sz;
7533
7534         total_size = le32_to_cpu(
7535                         ctrl_info->pqi_ofa_mem_virt_addr->bytes_allocated);
7536         min_chunk_size = total_size / PQI_OFA_MAX_SG_DESCRIPTORS;
7537
7538         for (chunk_sz = total_size; chunk_sz >= min_chunk_size; chunk_sz /= 2)
7539                 if (!pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_sz))
7540                         return 0;
7541
7542         return -ENOMEM;
7543 }
7544
7545 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info,
7546         u32 bytes_requested)
7547 {
7548         struct pqi_ofa_memory *pqi_ofa_memory;
7549         struct device *dev;
7550
7551         dev = &ctrl_info->pci_dev->dev;
7552         pqi_ofa_memory = dma_alloc_coherent(dev,
7553                                             PQI_OFA_MEMORY_DESCRIPTOR_LENGTH,
7554                                             &ctrl_info->pqi_ofa_mem_dma_handle,
7555                                             GFP_KERNEL);
7556
7557         if (!pqi_ofa_memory)
7558                 return;
7559
7560         put_unaligned_le16(PQI_OFA_VERSION, &pqi_ofa_memory->version);
7561         memcpy(&pqi_ofa_memory->signature, PQI_OFA_SIGNATURE,
7562                                         sizeof(pqi_ofa_memory->signature));
7563         pqi_ofa_memory->bytes_allocated = cpu_to_le32(bytes_requested);
7564
7565         ctrl_info->pqi_ofa_mem_virt_addr = pqi_ofa_memory;
7566
7567         if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) {
7568                 dev_err(dev, "Failed to allocate host buffer of size = %u",
7569                         bytes_requested);
7570         }
7571 }
7572
7573 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info)
7574 {
7575         int i;
7576         struct pqi_sg_descriptor *mem_descriptor;
7577         struct pqi_ofa_memory *ofap;
7578
7579         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7580
7581         if (!ofap)
7582                 return;
7583
7584         if (!ofap->bytes_allocated)
7585                 goto out;
7586
7587         mem_descriptor = ofap->sg_descriptor;
7588
7589         for (i = 0; i < get_unaligned_le16(&ofap->num_memory_descriptors);
7590                 i++) {
7591                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7592                         get_unaligned_le32(&mem_descriptor[i].length),
7593                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
7594                         get_unaligned_le64(&mem_descriptor[i].address));
7595         }
7596         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
7597
7598 out:
7599         dma_free_coherent(&ctrl_info->pci_dev->dev,
7600                         PQI_OFA_MEMORY_DESCRIPTOR_LENGTH, ofap,
7601                         ctrl_info->pqi_ofa_mem_dma_handle);
7602         ctrl_info->pqi_ofa_mem_virt_addr = NULL;
7603 }
7604
7605 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info)
7606 {
7607         struct pqi_vendor_general_request request;
7608         size_t size;
7609         struct pqi_ofa_memory *ofap;
7610
7611         memset(&request, 0, sizeof(request));
7612
7613         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7614
7615         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
7616         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
7617                 &request.header.iu_length);
7618         put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE,
7619                 &request.function_code);
7620
7621         if (ofap) {
7622                 size = offsetof(struct pqi_ofa_memory, sg_descriptor) +
7623                         get_unaligned_le16(&ofap->num_memory_descriptors) *
7624                         sizeof(struct pqi_sg_descriptor);
7625
7626                 put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle,
7627                         &request.data.ofa_memory_allocation.buffer_address);
7628                 put_unaligned_le32(size,
7629                         &request.data.ofa_memory_allocation.buffer_length);
7630
7631         }
7632
7633         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
7634                 0, NULL, NO_TIMEOUT);
7635 }
7636
7637 #define PQI_POST_RESET_DELAY_B4_MSGU_READY      5000
7638
7639 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info)
7640 {
7641         msleep(PQI_POST_RESET_DELAY_B4_MSGU_READY);
7642         return pqi_ctrl_init_resume(ctrl_info);
7643 }
7644
7645 static void pqi_perform_lockup_action(void)
7646 {
7647         switch (pqi_lockup_action) {
7648         case PANIC:
7649                 panic("FATAL: Smart Family Controller lockup detected");
7650                 break;
7651         case REBOOT:
7652                 emergency_restart();
7653                 break;
7654         case NONE:
7655         default:
7656                 break;
7657         }
7658 }
7659
7660 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
7661         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
7662         .status = SAM_STAT_CHECK_CONDITION,
7663 };
7664
7665 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
7666 {
7667         unsigned int i;
7668         struct pqi_io_request *io_request;
7669         struct scsi_cmnd *scmd;
7670
7671         for (i = 0; i < ctrl_info->max_io_slots; i++) {
7672                 io_request = &ctrl_info->io_request_pool[i];
7673                 if (atomic_read(&io_request->refcount) == 0)
7674                         continue;
7675
7676                 scmd = io_request->scmd;
7677                 if (scmd) {
7678                         set_host_byte(scmd, DID_NO_CONNECT);
7679                 } else {
7680                         io_request->status = -ENXIO;
7681                         io_request->error_info =
7682                                 &pqi_ctrl_offline_raid_error_info;
7683                 }
7684
7685                 io_request->io_complete_callback(io_request,
7686                         io_request->context);
7687         }
7688 }
7689
7690 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
7691 {
7692         pqi_perform_lockup_action();
7693         pqi_stop_heartbeat_timer(ctrl_info);
7694         pqi_free_interrupts(ctrl_info);
7695         pqi_cancel_rescan_worker(ctrl_info);
7696         pqi_cancel_update_time_worker(ctrl_info);
7697         pqi_ctrl_wait_until_quiesced(ctrl_info);
7698         pqi_fail_all_outstanding_requests(ctrl_info);
7699         pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
7700         pqi_ctrl_unblock_requests(ctrl_info);
7701 }
7702
7703 static void pqi_ctrl_offline_worker(struct work_struct *work)
7704 {
7705         struct pqi_ctrl_info *ctrl_info;
7706
7707         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
7708         pqi_take_ctrl_offline_deferred(ctrl_info);
7709 }
7710
7711 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
7712 {
7713         if (!ctrl_info->controller_online)
7714                 return;
7715
7716         ctrl_info->controller_online = false;
7717         ctrl_info->pqi_mode_enabled = false;
7718         pqi_ctrl_block_requests(ctrl_info);
7719         if (!pqi_disable_ctrl_shutdown)
7720                 sis_shutdown_ctrl(ctrl_info);
7721         pci_disable_device(ctrl_info->pci_dev);
7722         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
7723         schedule_work(&ctrl_info->ctrl_offline_work);
7724 }
7725
7726 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
7727         const struct pci_device_id *id)
7728 {
7729         char *ctrl_description;
7730
7731         if (id->driver_data)
7732                 ctrl_description = (char *)id->driver_data;
7733         else
7734                 ctrl_description = "Microsemi Smart Family Controller";
7735
7736         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
7737 }
7738
7739 static int pqi_pci_probe(struct pci_dev *pci_dev,
7740         const struct pci_device_id *id)
7741 {
7742         int rc;
7743         int node, cp_node;
7744         struct pqi_ctrl_info *ctrl_info;
7745
7746         pqi_print_ctrl_info(pci_dev, id);
7747
7748         if (pqi_disable_device_id_wildcards &&
7749                 id->subvendor == PCI_ANY_ID &&
7750                 id->subdevice == PCI_ANY_ID) {
7751                 dev_warn(&pci_dev->dev,
7752                         "controller not probed because device ID wildcards are disabled\n");
7753                 return -ENODEV;
7754         }
7755
7756         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
7757                 dev_warn(&pci_dev->dev,
7758                         "controller device ID matched using wildcards\n");
7759
7760         node = dev_to_node(&pci_dev->dev);
7761         if (node == NUMA_NO_NODE) {
7762                 cp_node = cpu_to_node(0);
7763                 if (cp_node == NUMA_NO_NODE)
7764                         cp_node = 0;
7765                 set_dev_node(&pci_dev->dev, cp_node);
7766         }
7767
7768         ctrl_info = pqi_alloc_ctrl_info(node);
7769         if (!ctrl_info) {
7770                 dev_err(&pci_dev->dev,
7771                         "failed to allocate controller info block\n");
7772                 return -ENOMEM;
7773         }
7774
7775         ctrl_info->pci_dev = pci_dev;
7776
7777         rc = pqi_pci_init(ctrl_info);
7778         if (rc)
7779                 goto error;
7780
7781         rc = pqi_ctrl_init(ctrl_info);
7782         if (rc)
7783                 goto error;
7784
7785         return 0;
7786
7787 error:
7788         pqi_remove_ctrl(ctrl_info);
7789
7790         return rc;
7791 }
7792
7793 static void pqi_pci_remove(struct pci_dev *pci_dev)
7794 {
7795         struct pqi_ctrl_info *ctrl_info;
7796
7797         ctrl_info = pci_get_drvdata(pci_dev);
7798         if (!ctrl_info)
7799                 return;
7800
7801         ctrl_info->in_shutdown = true;
7802
7803         pqi_remove_ctrl(ctrl_info);
7804 }
7805
7806 static void pqi_shutdown(struct pci_dev *pci_dev)
7807 {
7808         int rc;
7809         struct pqi_ctrl_info *ctrl_info;
7810
7811         ctrl_info = pci_get_drvdata(pci_dev);
7812         if (!ctrl_info)
7813                 goto error;
7814
7815         /*
7816          * Write all data in the controller's battery-backed cache to
7817          * storage.
7818          */
7819         rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
7820         pqi_free_interrupts(ctrl_info);
7821         pqi_reset(ctrl_info);
7822         if (rc == 0)
7823                 return;
7824
7825 error:
7826         dev_warn(&pci_dev->dev,
7827                 "unable to flush controller cache\n");
7828 }
7829
7830 static void pqi_process_lockup_action_param(void)
7831 {
7832         unsigned int i;
7833
7834         if (!pqi_lockup_action_param)
7835                 return;
7836
7837         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
7838                 if (strcmp(pqi_lockup_action_param,
7839                         pqi_lockup_actions[i].name) == 0) {
7840                         pqi_lockup_action = pqi_lockup_actions[i].action;
7841                         return;
7842                 }
7843         }
7844
7845         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
7846                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
7847 }
7848
7849 static void pqi_process_module_params(void)
7850 {
7851         pqi_process_lockup_action_param();
7852 }
7853
7854 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
7855 {
7856         struct pqi_ctrl_info *ctrl_info;
7857
7858         ctrl_info = pci_get_drvdata(pci_dev);
7859
7860         pqi_disable_events(ctrl_info);
7861         pqi_cancel_update_time_worker(ctrl_info);
7862         pqi_cancel_rescan_worker(ctrl_info);
7863         pqi_wait_until_scan_finished(ctrl_info);
7864         pqi_wait_until_lun_reset_finished(ctrl_info);
7865         pqi_wait_until_ofa_finished(ctrl_info);
7866         pqi_flush_cache(ctrl_info, SUSPEND);
7867         pqi_ctrl_block_requests(ctrl_info);
7868         pqi_ctrl_wait_until_quiesced(ctrl_info);
7869         pqi_wait_until_inbound_queues_empty(ctrl_info);
7870         pqi_ctrl_wait_for_pending_io(ctrl_info, NO_TIMEOUT);
7871         pqi_stop_heartbeat_timer(ctrl_info);
7872
7873         if (state.event == PM_EVENT_FREEZE)
7874                 return 0;
7875
7876         pci_save_state(pci_dev);
7877         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
7878
7879         ctrl_info->controller_online = false;
7880         ctrl_info->pqi_mode_enabled = false;
7881
7882         return 0;
7883 }
7884
7885 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
7886 {
7887         int rc;
7888         struct pqi_ctrl_info *ctrl_info;
7889
7890         ctrl_info = pci_get_drvdata(pci_dev);
7891
7892         if (pci_dev->current_state != PCI_D0) {
7893                 ctrl_info->max_hw_queue_index = 0;
7894                 pqi_free_interrupts(ctrl_info);
7895                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
7896                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
7897                         IRQF_SHARED, DRIVER_NAME_SHORT,
7898                         &ctrl_info->queue_groups[0]);
7899                 if (rc) {
7900                         dev_err(&ctrl_info->pci_dev->dev,
7901                                 "irq %u init failed with error %d\n",
7902                                 pci_dev->irq, rc);
7903                         return rc;
7904                 }
7905                 pqi_start_heartbeat_timer(ctrl_info);
7906                 pqi_ctrl_unblock_requests(ctrl_info);
7907                 return 0;
7908         }
7909
7910         pci_set_power_state(pci_dev, PCI_D0);
7911         pci_restore_state(pci_dev);
7912
7913         return pqi_ctrl_init_resume(ctrl_info);
7914 }
7915
7916 /* Define the PCI IDs for the controllers that we support. */
7917 static const struct pci_device_id pqi_pci_id_table[] = {
7918         {
7919                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7920                                0x105b, 0x1211)
7921         },
7922         {
7923                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7924                                0x105b, 0x1321)
7925         },
7926         {
7927                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7928                                0x152d, 0x8a22)
7929         },
7930         {
7931                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7932                                0x152d, 0x8a23)
7933         },
7934         {
7935                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7936                                0x152d, 0x8a24)
7937         },
7938         {
7939                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7940                                0x152d, 0x8a36)
7941         },
7942         {
7943                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7944                                0x152d, 0x8a37)
7945         },
7946         {
7947                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7948                                0x193d, 0x1104)
7949         },
7950         {
7951                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7952                                0x193d, 0x1105)
7953         },
7954         {
7955                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7956                                0x193d, 0x1106)
7957         },
7958         {
7959                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7960                                0x193d, 0x1107)
7961         },
7962         {
7963                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7964                                0x193d, 0x8460)
7965         },
7966         {
7967                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7968                                0x193d, 0x8461)
7969         },
7970         {
7971                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7972                                0x193d, 0xc460)
7973         },
7974         {
7975                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7976                                0x193d, 0xc461)
7977         },
7978         {
7979                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7980                                0x193d, 0xf460)
7981         },
7982         {
7983                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7984                                0x193d, 0xf461)
7985         },
7986         {
7987                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7988                                0x1bd4, 0x0045)
7989         },
7990         {
7991                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7992                                0x1bd4, 0x0046)
7993         },
7994         {
7995                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7996                                0x1bd4, 0x0047)
7997         },
7998         {
7999                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8000                                0x1bd4, 0x0048)
8001         },
8002         {
8003                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8004                                0x1bd4, 0x004a)
8005         },
8006         {
8007                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8008                                0x1bd4, 0x004b)
8009         },
8010         {
8011                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8012                                0x1bd4, 0x004c)
8013         },
8014         {
8015                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8016                                0x19e5, 0xd227)
8017         },
8018         {
8019                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8020                                0x19e5, 0xd228)
8021         },
8022         {
8023                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8024                                0x19e5, 0xd229)
8025         },
8026         {
8027                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8028                                0x19e5, 0xd22a)
8029         },
8030         {
8031                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8032                                0x19e5, 0xd22b)
8033         },
8034         {
8035                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8036                                0x19e5, 0xd22c)
8037         },
8038         {
8039                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8040                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
8041         },
8042         {
8043                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8044                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
8045         },
8046         {
8047                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8048                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
8049         },
8050         {
8051                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8052                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
8053         },
8054         {
8055                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8056                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
8057         },
8058         {
8059                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8060                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
8061         },
8062         {
8063                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8064                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
8065         },
8066         {
8067                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8068                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
8069         },
8070         {
8071                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8072                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
8073         },
8074         {
8075                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8076                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
8077         },
8078         {
8079                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8080                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
8081         },
8082         {
8083                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8084                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
8085         },
8086         {
8087                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8088                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
8089         },
8090         {
8091                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8092                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
8093         },
8094         {
8095                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8096                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
8097         },
8098         {
8099                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8100                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
8101         },
8102         {
8103                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8104                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
8105         },
8106         {
8107                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8108                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
8109         },
8110         {
8111                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8112                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
8113         },
8114         {
8115                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8116                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
8117         },
8118         {
8119                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8120                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
8121         },
8122         {
8123                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8124                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
8125         },
8126         {
8127                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8128                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
8129         },
8130         {
8131                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8132                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
8133         },
8134         {
8135                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8136                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
8137         },
8138         {
8139                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8140                                PCI_VENDOR_ID_ADAPTEC2, 0x1282)
8141         },
8142         {
8143                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8144                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
8145         },
8146         {
8147                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8148                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
8149         },
8150         {
8151                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8152                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
8153         },
8154         {
8155                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8156                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
8157         },
8158         {
8159                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8160                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
8161         },
8162         {
8163                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8164                                PCI_VENDOR_ID_ADVANTECH, 0x8312)
8165         },
8166         {
8167                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8168                                PCI_VENDOR_ID_DELL, 0x1fe0)
8169         },
8170         {
8171                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8172                                PCI_VENDOR_ID_HP, 0x0600)
8173         },
8174         {
8175                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8176                                PCI_VENDOR_ID_HP, 0x0601)
8177         },
8178         {
8179                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8180                                PCI_VENDOR_ID_HP, 0x0602)
8181         },
8182         {
8183                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8184                                PCI_VENDOR_ID_HP, 0x0603)
8185         },
8186         {
8187                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8188                                PCI_VENDOR_ID_HP, 0x0609)
8189         },
8190         {
8191                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8192                                PCI_VENDOR_ID_HP, 0x0650)
8193         },
8194         {
8195                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8196                                PCI_VENDOR_ID_HP, 0x0651)
8197         },
8198         {
8199                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8200                                PCI_VENDOR_ID_HP, 0x0652)
8201         },
8202         {
8203                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8204                                PCI_VENDOR_ID_HP, 0x0653)
8205         },
8206         {
8207                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8208                                PCI_VENDOR_ID_HP, 0x0654)
8209         },
8210         {
8211                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8212                                PCI_VENDOR_ID_HP, 0x0655)
8213         },
8214         {
8215                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8216                                PCI_VENDOR_ID_HP, 0x0700)
8217         },
8218         {
8219                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8220                                PCI_VENDOR_ID_HP, 0x0701)
8221         },
8222         {
8223                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8224                                PCI_VENDOR_ID_HP, 0x1001)
8225         },
8226         {
8227                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8228                                PCI_VENDOR_ID_HP, 0x1100)
8229         },
8230         {
8231                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8232                                PCI_VENDOR_ID_HP, 0x1101)
8233         },
8234         {
8235                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8236                                PCI_ANY_ID, PCI_ANY_ID)
8237         },
8238         { 0 }
8239 };
8240
8241 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
8242
8243 static struct pci_driver pqi_pci_driver = {
8244         .name = DRIVER_NAME_SHORT,
8245         .id_table = pqi_pci_id_table,
8246         .probe = pqi_pci_probe,
8247         .remove = pqi_pci_remove,
8248         .shutdown = pqi_shutdown,
8249 #if defined(CONFIG_PM)
8250         .suspend = pqi_suspend,
8251         .resume = pqi_resume,
8252 #endif
8253 };
8254
8255 static int __init pqi_init(void)
8256 {
8257         int rc;
8258
8259         pr_info(DRIVER_NAME "\n");
8260
8261         pqi_sas_transport_template =
8262                 sas_attach_transport(&pqi_sas_transport_functions);
8263         if (!pqi_sas_transport_template)
8264                 return -ENODEV;
8265
8266         pqi_process_module_params();
8267
8268         rc = pci_register_driver(&pqi_pci_driver);
8269         if (rc)
8270                 sas_release_transport(pqi_sas_transport_template);
8271
8272         return rc;
8273 }
8274
8275 static void __exit pqi_cleanup(void)
8276 {
8277         pci_unregister_driver(&pqi_pci_driver);
8278         sas_release_transport(pqi_sas_transport_template);
8279 }
8280
8281 module_init(pqi_init);
8282 module_exit(pqi_cleanup);
8283
8284 static void __attribute__((unused)) verify_structures(void)
8285 {
8286         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8287                 sis_host_to_ctrl_doorbell) != 0x20);
8288         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8289                 sis_interrupt_mask) != 0x34);
8290         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8291                 sis_ctrl_to_host_doorbell) != 0x9c);
8292         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8293                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
8294         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8295                 sis_driver_scratch) != 0xb0);
8296         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8297                 sis_firmware_status) != 0xbc);
8298         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8299                 sis_mailbox) != 0x1000);
8300         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8301                 pqi_registers) != 0x4000);
8302
8303         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8304                 iu_type) != 0x0);
8305         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8306                 iu_length) != 0x2);
8307         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8308                 response_queue_id) != 0x4);
8309         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8310                 work_area) != 0x6);
8311         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
8312
8313         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8314                 status) != 0x0);
8315         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8316                 service_response) != 0x1);
8317         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8318                 data_present) != 0x2);
8319         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8320                 reserved) != 0x3);
8321         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8322                 residual_count) != 0x4);
8323         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8324                 data_length) != 0x8);
8325         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8326                 reserved1) != 0xa);
8327         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8328                 data) != 0xc);
8329         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
8330
8331         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8332                 data_in_result) != 0x0);
8333         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8334                 data_out_result) != 0x1);
8335         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8336                 reserved) != 0x2);
8337         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8338                 status) != 0x5);
8339         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8340                 status_qualifier) != 0x6);
8341         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8342                 sense_data_length) != 0x8);
8343         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8344                 response_data_length) != 0xa);
8345         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8346                 data_in_transferred) != 0xc);
8347         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8348                 data_out_transferred) != 0x10);
8349         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8350                 data) != 0x14);
8351         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
8352
8353         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8354                 signature) != 0x0);
8355         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8356                 function_and_status_code) != 0x8);
8357         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8358                 max_admin_iq_elements) != 0x10);
8359         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8360                 max_admin_oq_elements) != 0x11);
8361         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8362                 admin_iq_element_length) != 0x12);
8363         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8364                 admin_oq_element_length) != 0x13);
8365         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8366                 max_reset_timeout) != 0x14);
8367         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8368                 legacy_intx_status) != 0x18);
8369         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8370                 legacy_intx_mask_set) != 0x1c);
8371         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8372                 legacy_intx_mask_clear) != 0x20);
8373         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8374                 device_status) != 0x40);
8375         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8376                 admin_iq_pi_offset) != 0x48);
8377         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8378                 admin_oq_ci_offset) != 0x50);
8379         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8380                 admin_iq_element_array_addr) != 0x58);
8381         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8382                 admin_oq_element_array_addr) != 0x60);
8383         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8384                 admin_iq_ci_addr) != 0x68);
8385         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8386                 admin_oq_pi_addr) != 0x70);
8387         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8388                 admin_iq_num_elements) != 0x78);
8389         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8390                 admin_oq_num_elements) != 0x79);
8391         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8392                 admin_queue_int_msg_num) != 0x7a);
8393         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8394                 device_error) != 0x80);
8395         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8396                 error_details) != 0x88);
8397         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8398                 device_reset) != 0x90);
8399         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8400                 power_action) != 0x94);
8401         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
8402
8403         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8404                 header.iu_type) != 0);
8405         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8406                 header.iu_length) != 2);
8407         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8408                 header.work_area) != 6);
8409         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8410                 request_id) != 8);
8411         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8412                 function_code) != 10);
8413         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8414                 data.report_device_capability.buffer_length) != 44);
8415         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8416                 data.report_device_capability.sg_descriptor) != 48);
8417         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8418                 data.create_operational_iq.queue_id) != 12);
8419         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8420                 data.create_operational_iq.element_array_addr) != 16);
8421         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8422                 data.create_operational_iq.ci_addr) != 24);
8423         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8424                 data.create_operational_iq.num_elements) != 32);
8425         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8426                 data.create_operational_iq.element_length) != 34);
8427         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8428                 data.create_operational_iq.queue_protocol) != 36);
8429         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8430                 data.create_operational_oq.queue_id) != 12);
8431         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8432                 data.create_operational_oq.element_array_addr) != 16);
8433         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8434                 data.create_operational_oq.pi_addr) != 24);
8435         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8436                 data.create_operational_oq.num_elements) != 32);
8437         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8438                 data.create_operational_oq.element_length) != 34);
8439         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8440                 data.create_operational_oq.queue_protocol) != 36);
8441         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8442                 data.create_operational_oq.int_msg_num) != 40);
8443         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8444                 data.create_operational_oq.coalescing_count) != 42);
8445         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8446                 data.create_operational_oq.min_coalescing_time) != 44);
8447         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8448                 data.create_operational_oq.max_coalescing_time) != 48);
8449         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8450                 data.delete_operational_queue.queue_id) != 12);
8451         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
8452         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
8453                 data.create_operational_iq) != 64 - 11);
8454         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
8455                 data.create_operational_oq) != 64 - 11);
8456         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
8457                 data.delete_operational_queue) != 64 - 11);
8458
8459         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8460                 header.iu_type) != 0);
8461         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8462                 header.iu_length) != 2);
8463         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8464                 header.work_area) != 6);
8465         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8466                 request_id) != 8);
8467         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8468                 function_code) != 10);
8469         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8470                 status) != 11);
8471         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8472                 data.create_operational_iq.status_descriptor) != 12);
8473         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8474                 data.create_operational_iq.iq_pi_offset) != 16);
8475         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8476                 data.create_operational_oq.status_descriptor) != 12);
8477         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8478                 data.create_operational_oq.oq_ci_offset) != 16);
8479         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
8480
8481         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8482                 header.iu_type) != 0);
8483         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8484                 header.iu_length) != 2);
8485         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8486                 header.response_queue_id) != 4);
8487         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8488                 header.work_area) != 6);
8489         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8490                 request_id) != 8);
8491         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8492                 nexus_id) != 10);
8493         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8494                 buffer_length) != 12);
8495         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8496                 lun_number) != 16);
8497         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8498                 protocol_specific) != 24);
8499         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8500                 error_index) != 27);
8501         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8502                 cdb) != 32);
8503         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8504                 sg_descriptors) != 64);
8505         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
8506                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
8507
8508         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8509                 header.iu_type) != 0);
8510         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8511                 header.iu_length) != 2);
8512         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8513                 header.response_queue_id) != 4);
8514         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8515                 header.work_area) != 6);
8516         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8517                 request_id) != 8);
8518         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8519                 nexus_id) != 12);
8520         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8521                 buffer_length) != 16);
8522         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8523                 data_encryption_key_index) != 22);
8524         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8525                 encrypt_tweak_lower) != 24);
8526         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8527                 encrypt_tweak_upper) != 28);
8528         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8529                 cdb) != 32);
8530         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8531                 error_index) != 48);
8532         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8533                 num_sg_descriptors) != 50);
8534         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8535                 cdb_length) != 51);
8536         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8537                 lun_number) != 52);
8538         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8539                 sg_descriptors) != 64);
8540         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
8541                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
8542
8543         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8544                 header.iu_type) != 0);
8545         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8546                 header.iu_length) != 2);
8547         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8548                 request_id) != 8);
8549         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8550                 error_index) != 10);
8551
8552         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8553                 header.iu_type) != 0);
8554         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8555                 header.iu_length) != 2);
8556         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8557                 header.response_queue_id) != 4);
8558         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8559                 request_id) != 8);
8560         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8561                 data.report_event_configuration.buffer_length) != 12);
8562         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8563                 data.report_event_configuration.sg_descriptors) != 16);
8564         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8565                 data.set_event_configuration.global_event_oq_id) != 10);
8566         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8567                 data.set_event_configuration.buffer_length) != 12);
8568         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8569                 data.set_event_configuration.sg_descriptors) != 16);
8570
8571         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
8572                 max_inbound_iu_length) != 6);
8573         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
8574                 max_outbound_iu_length) != 14);
8575         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
8576
8577         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8578                 data_length) != 0);
8579         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8580                 iq_arbitration_priority_support_bitmask) != 8);
8581         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8582                 maximum_aw_a) != 9);
8583         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8584                 maximum_aw_b) != 10);
8585         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8586                 maximum_aw_c) != 11);
8587         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8588                 max_inbound_queues) != 16);
8589         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8590                 max_elements_per_iq) != 18);
8591         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8592                 max_iq_element_length) != 24);
8593         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8594                 min_iq_element_length) != 26);
8595         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8596                 max_outbound_queues) != 30);
8597         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8598                 max_elements_per_oq) != 32);
8599         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8600                 intr_coalescing_time_granularity) != 34);
8601         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8602                 max_oq_element_length) != 36);
8603         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8604                 min_oq_element_length) != 38);
8605         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8606                 iu_layer_descriptors) != 64);
8607         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
8608
8609         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
8610                 event_type) != 0);
8611         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
8612                 oq_id) != 2);
8613         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
8614
8615         BUILD_BUG_ON(offsetof(struct pqi_event_config,
8616                 num_event_descriptors) != 2);
8617         BUILD_BUG_ON(offsetof(struct pqi_event_config,
8618                 descriptors) != 4);
8619
8620         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
8621                 ARRAY_SIZE(pqi_supported_event_types));
8622
8623         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8624                 header.iu_type) != 0);
8625         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8626                 header.iu_length) != 2);
8627         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8628                 event_type) != 8);
8629         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8630                 event_id) != 10);
8631         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8632                 additional_event_id) != 12);
8633         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8634                 data) != 16);
8635         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
8636
8637         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8638                 header.iu_type) != 0);
8639         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8640                 header.iu_length) != 2);
8641         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8642                 event_type) != 8);
8643         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8644                 event_id) != 10);
8645         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8646                 additional_event_id) != 12);
8647         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
8648
8649         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8650                 header.iu_type) != 0);
8651         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8652                 header.iu_length) != 2);
8653         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8654                 request_id) != 8);
8655         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8656                 nexus_id) != 10);
8657         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8658                 lun_number) != 16);
8659         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8660                 protocol_specific) != 24);
8661         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8662                 outbound_queue_id_to_manage) != 26);
8663         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8664                 request_id_to_manage) != 28);
8665         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8666                 task_management_function) != 30);
8667         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
8668
8669         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8670                 header.iu_type) != 0);
8671         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8672                 header.iu_length) != 2);
8673         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8674                 request_id) != 8);
8675         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8676                 nexus_id) != 10);
8677         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8678                 additional_response_info) != 12);
8679         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8680                 response_code) != 15);
8681         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
8682
8683         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8684                 configured_logical_drive_count) != 0);
8685         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8686                 configuration_signature) != 1);
8687         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8688                 firmware_version) != 5);
8689         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8690                 extended_logical_unit_count) != 154);
8691         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8692                 firmware_build_number) != 190);
8693         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8694                 controller_mode) != 292);
8695
8696         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8697                 phys_bay_in_box) != 115);
8698         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8699                 device_type) != 120);
8700         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8701                 redundant_path_present_map) != 1736);
8702         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8703                 active_path_number) != 1738);
8704         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8705                 alternate_paths_phys_connector) != 1739);
8706         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8707                 alternate_paths_phys_box_on_port) != 1755);
8708         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8709                 current_queue_depth_limit) != 1796);
8710         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
8711
8712         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
8713         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
8714         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
8715                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8716         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
8717                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8718         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
8719         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
8720                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8721         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
8722         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
8723                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8724
8725         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
8726         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
8727                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
8728 }