drivers/scsi/smartpqi/smartpqi_init.c

   1 /*
   2  *    driver for Microsemi PQI-based storage controllers
   3  *    Copyright (c) 2016-2017 Microsemi Corporation
   4  *    Copyright (c) 2016 PMC-Sierra, Inc.
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; version 2 of the License.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  14  *
  15  *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
  16  *
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/pci.h>
  22 #include <linux/delay.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/sched.h>
  25 #include <linux/rtc.h>
  26 #include <linux/bcd.h>
  27 #include <linux/reboot.h>
  28 #include <linux/cciss_ioctl.h>
  29 #include <linux/blk-mq-pci.h>
  30 #include <scsi/scsi_host.h>
  31 #include <scsi/scsi_cmnd.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_transport_sas.h>
  35 #include <asm/unaligned.h>
  36 #include "smartpqi.h"
  37 #include "smartpqi_sis.h"
  38
  39 #if !defined(BUILD_TIMESTAMP)
  40 #define BUILD_TIMESTAMP
  41 #endif
  42
  43 #define DRIVER_VERSION          "1.2.4-070"
  44 #define DRIVER_MAJOR            1
  45 #define DRIVER_MINOR            2
  46 #define DRIVER_RELEASE          4
  47 #define DRIVER_REVISION         70
  48
  49 #define DRIVER_NAME             "Microsemi PQI Driver (v" \
  50                                 DRIVER_VERSION BUILD_TIMESTAMP ")"
  51 #define DRIVER_NAME_SHORT       "smartpqi"
  52
  53 #define PQI_EXTRA_SGL_MEMORY    (12 * sizeof(struct pqi_sg_descriptor))
  54
  55 MODULE_AUTHOR("Microsemi");
  56 MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
  57         DRIVER_VERSION);
  58 MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
  59 MODULE_VERSION(DRIVER_VERSION);
  60 MODULE_LICENSE("GPL");
  61
  62 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
  63 static void pqi_ctrl_offline_worker(struct work_struct *work);
  64 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info);
  65 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  66 static void pqi_scan_start(struct Scsi_Host *shost);
  67 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  68         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  69         struct pqi_io_request *io_request);
  70 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  71         struct pqi_iu_header *request, unsigned int flags,
  72         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs);
  73 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  74         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  75         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  76         struct pqi_encryption_info *encryption_info, bool raid_bypass);
  77 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
  78 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
  79 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info);
  80 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info,
  81         u32 bytes_requested);
  82 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
  83 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
  84 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
  85         struct pqi_scsi_dev *device, unsigned long timeout_secs);
  86
  87 /* for flags argument to pqi_submit_raid_request_synchronous() */
  88 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
  89
  90 static struct scsi_transport_template *pqi_sas_transport_template;
  91
  92 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  93
  94 enum pqi_lockup_action {
  95         NONE,
  96         REBOOT,
  97         PANIC
  98 };
  99
 100 static enum pqi_lockup_action pqi_lockup_action = NONE;
 101
 102 static struct {
 103         enum pqi_lockup_action  action;
 104         char                    *name;
 105 } pqi_lockup_actions[] = {
 106         {
 107                 .action = NONE,
 108                 .name = "none",
 109         },
 110         {
 111                 .action = REBOOT,
 112                 .name = "reboot",
 113         },
 114         {
 115                 .action = PANIC,
 116                 .name = "panic",
 117         },
 118 };
 119
 120 static unsigned int pqi_supported_event_types[] = {
 121         PQI_EVENT_TYPE_HOTPLUG,
 122         PQI_EVENT_TYPE_HARDWARE,
 123         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 124         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 125         PQI_EVENT_TYPE_OFA,
 126         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 127         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 128 };
 129
 130 static int pqi_disable_device_id_wildcards;
 131 module_param_named(disable_device_id_wildcards,
 132         pqi_disable_device_id_wildcards, int, 0644);
 133 MODULE_PARM_DESC(disable_device_id_wildcards,
 134         "Disable device ID wildcards.");
 135
 136 static int pqi_disable_heartbeat;
 137 module_param_named(disable_heartbeat,
 138         pqi_disable_heartbeat, int, 0644);
 139 MODULE_PARM_DESC(disable_heartbeat,
 140         "Disable heartbeat.");
 141
 142 static int pqi_disable_ctrl_shutdown;
 143 module_param_named(disable_ctrl_shutdown,
 144         pqi_disable_ctrl_shutdown, int, 0644);
 145 MODULE_PARM_DESC(disable_ctrl_shutdown,
 146         "Disable controller shutdown when controller locked up.");
 147
 148 static char *pqi_lockup_action_param;
 149 module_param_named(lockup_action,
 150         pqi_lockup_action_param, charp, 0644);
 151 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 152         "\t\tSupported: none, reboot, panic\n"
 153         "\t\tDefault: none");
 154
 155 static char *raid_levels[] = {
 156         "RAID-0",
 157         "RAID-4",
 158         "RAID-1(1+0)",
 159         "RAID-5",
 160         "RAID-5+1",
 161         "RAID-ADG",
 162         "RAID-1(ADM)",
 163 };
 164
 165 static char *pqi_raid_level_to_string(u8 raid_level)
 166 {
 167         if (raid_level < ARRAY_SIZE(raid_levels))
 168                 return raid_levels[raid_level];
 169
 170         return "RAID UNKNOWN";
 171 }
 172
 173 #define SA_RAID_0               0
 174 #define SA_RAID_4               1
 175 #define SA_RAID_1               2       /* also used for RAID 10 */
 176 #define SA_RAID_5               3       /* also used for RAID 50 */
 177 #define SA_RAID_51              4
 178 #define SA_RAID_6               5       /* also used for RAID 60 */
 179 #define SA_RAID_ADM             6       /* also used for RAID 1+0 ADM */
 180 #define SA_RAID_MAX             SA_RAID_ADM
 181 #define SA_RAID_UNKNOWN         0xff
 182
 183 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 184 {
 185         pqi_prep_for_scsi_done(scmd);
 186         scmd->scsi_done(scmd);
 187 }
 188
 189 static inline void pqi_disable_write_same(struct scsi_device *sdev)
 190 {
 191         sdev->no_write_same = 1;
 192 }
 193
 194 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 195 {
 196         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 197 }
 198
 199 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 200 {
 201         return !device->is_physical_device;
 202 }
 203
 204 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 205 {
 206         return scsi3addr[2] != 0;
 207 }
 208
 209 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 210 {
 211         if (ctrl_info->controller_online)
 212                 if (!sis_is_firmware_running(ctrl_info))
 213                         pqi_take_ctrl_offline(ctrl_info);
 214 }
 215
 216 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 217 {
 218         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 219 }
 220
 221 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(
 222         struct pqi_ctrl_info *ctrl_info)
 223 {
 224         return sis_read_driver_scratch(ctrl_info);
 225 }
 226
 227 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 228         enum pqi_ctrl_mode mode)
 229 {
 230         sis_write_driver_scratch(ctrl_info, mode);
 231 }
 232
 233 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 234 {
 235         ctrl_info->block_requests = true;
 236         scsi_block_requests(ctrl_info->scsi_host);
 237 }
 238
 239 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 240 {
 241         ctrl_info->block_requests = false;
 242         wake_up_all(&ctrl_info->block_requests_wait);
 243         pqi_retry_raid_bypass_requests(ctrl_info);
 244         scsi_unblock_requests(ctrl_info->scsi_host);
 245 }
 246
 247 static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info,
 248         unsigned long timeout_msecs)
 249 {
 250         unsigned long remaining_msecs;
 251
 252         if (!pqi_ctrl_blocked(ctrl_info))
 253                 return timeout_msecs;
 254
 255         atomic_inc(&ctrl_info->num_blocked_threads);
 256
 257         if (timeout_msecs == NO_TIMEOUT) {
 258                 wait_event(ctrl_info->block_requests_wait,
 259                         !pqi_ctrl_blocked(ctrl_info));
 260                 remaining_msecs = timeout_msecs;
 261         } else {
 262                 unsigned long remaining_jiffies;
 263
 264                 remaining_jiffies =
 265                         wait_event_timeout(ctrl_info->block_requests_wait,
 266                                 !pqi_ctrl_blocked(ctrl_info),
 267                                 msecs_to_jiffies(timeout_msecs));
 268                 remaining_msecs = jiffies_to_msecs(remaining_jiffies);
 269         }
 270
 271         atomic_dec(&ctrl_info->num_blocked_threads);
 272
 273         return remaining_msecs;
 274 }
 275
 276 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 277 {
 278         while (atomic_read(&ctrl_info->num_busy_threads) >
 279                 atomic_read(&ctrl_info->num_blocked_threads))
 280                 usleep_range(1000, 2000);
 281 }
 282
 283 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 284 {
 285         return device->device_offline;
 286 }
 287
 288 static inline void pqi_device_reset_start(struct pqi_scsi_dev *device)
 289 {
 290         device->in_reset = true;
 291 }
 292
 293 static inline void pqi_device_reset_done(struct pqi_scsi_dev *device)
 294 {
 295         device->in_reset = false;
 296 }
 297
 298 static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device)
 299 {
 300         return device->in_reset;
 301 }
 302
 303 static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info)
 304 {
 305         ctrl_info->in_ofa = true;
 306 }
 307
 308 static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info)
 309 {
 310         ctrl_info->in_ofa = false;
 311 }
 312
 313 static inline bool pqi_ctrl_in_ofa(struct pqi_ctrl_info *ctrl_info)
 314 {
 315         return ctrl_info->in_ofa;
 316 }
 317
 318 static inline void pqi_device_remove_start(struct pqi_scsi_dev *device)
 319 {
 320         device->in_remove = true;
 321 }
 322
 323 static inline bool pqi_device_in_remove(struct pqi_ctrl_info *ctrl_info,
 324                                         struct pqi_scsi_dev *device)
 325 {
 326         return device->in_remove && !ctrl_info->in_shutdown;
 327 }
 328
 329 static inline void pqi_schedule_rescan_worker_with_delay(
 330         struct pqi_ctrl_info *ctrl_info, unsigned long delay)
 331 {
 332         if (pqi_ctrl_offline(ctrl_info))
 333                 return;
 334         if (pqi_ctrl_in_ofa(ctrl_info))
 335                 return;
 336
 337         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 338 }
 339
 340 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 341 {
 342         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 343 }
 344
 345 #define PQI_RESCAN_WORK_DELAY   (10 * PQI_HZ)
 346
 347 static inline void pqi_schedule_rescan_worker_delayed(
 348         struct pqi_ctrl_info *ctrl_info)
 349 {
 350         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 351 }
 352
 353 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 354 {
 355         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 356 }
 357
 358 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 359 {
 360         if (!ctrl_info->heartbeat_counter)
 361                 return 0;
 362
 363         return readl(ctrl_info->heartbeat_counter);
 364 }
 365
 366 static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 367 {
 368         if (!ctrl_info->soft_reset_status)
 369                 return 0;
 370
 371         return readb(ctrl_info->soft_reset_status);
 372 }
 373
 374 static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info,
 375                                                 u8 clear)
 376 {
 377         u8 status;
 378
 379         if (!ctrl_info->soft_reset_status)
 380                 return;
 381
 382         status = pqi_read_soft_reset_status(ctrl_info);
 383         status &= ~clear;
 384         writeb(status, ctrl_info->soft_reset_status);
 385 }
 386
 387 static int pqi_map_single(struct pci_dev *pci_dev,
 388         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 389         size_t buffer_length, enum dma_data_direction data_direction)
 390 {
 391         dma_addr_t bus_address;
 392
 393         if (!buffer || buffer_length == 0 || data_direction == DMA_NONE)
 394                 return 0;
 395
 396         bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length,
 397                 data_direction);
 398         if (dma_mapping_error(&pci_dev->dev, bus_address))
 399                 return -ENOMEM;
 400
 401         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 402         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 403         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 404
 405         return 0;
 406 }
 407
 408 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 409         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 410         enum dma_data_direction data_direction)
 411 {
 412         int i;
 413
 414         if (data_direction == DMA_NONE)
 415                 return;
 416
 417         for (i = 0; i < num_descriptors; i++)
 418                 dma_unmap_single(&pci_dev->dev,
 419                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 420                         get_unaligned_le32(&descriptors[i].length),
 421                         data_direction);
 422 }
 423
 424 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 425         struct pqi_raid_path_request *request, u8 cmd,
 426         u8 *scsi3addr, void *buffer, size_t buffer_length,
 427         u16 vpd_page, enum dma_data_direction *dir)
 428 {
 429         u8 *cdb;
 430         size_t cdb_length = buffer_length;
 431
 432         memset(request, 0, sizeof(*request));
 433
 434         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 435         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 436                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 437                 &request->header.iu_length);
 438         put_unaligned_le32(buffer_length, &request->buffer_length);
 439         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 440         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 441         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 442
 443         cdb = request->cdb;
 444
 445         switch (cmd) {
 446         case INQUIRY:
 447                 request->data_direction = SOP_READ_FLAG;
 448                 cdb[0] = INQUIRY;
 449                 if (vpd_page & VPD_PAGE) {
 450                         cdb[1] = 0x1;
 451                         cdb[2] = (u8)vpd_page;
 452                 }
 453                 cdb[4] = (u8)cdb_length;
 454                 break;
 455         case CISS_REPORT_LOG:
 456         case CISS_REPORT_PHYS:
 457                 request->data_direction = SOP_READ_FLAG;
 458                 cdb[0] = cmd;
 459                 if (cmd == CISS_REPORT_PHYS)
 460                         cdb[1] = CISS_REPORT_PHYS_EXTENDED;
 461                 else
 462                         cdb[1] = CISS_REPORT_LOG_EXTENDED;
 463                 put_unaligned_be32(cdb_length, &cdb[6]);
 464                 break;
 465         case CISS_GET_RAID_MAP:
 466                 request->data_direction = SOP_READ_FLAG;
 467                 cdb[0] = CISS_READ;
 468                 cdb[1] = CISS_GET_RAID_MAP;
 469                 put_unaligned_be32(cdb_length, &cdb[6]);
 470                 break;
 471         case SA_FLUSH_CACHE:
 472                 request->data_direction = SOP_WRITE_FLAG;
 473                 cdb[0] = BMIC_WRITE;
 474                 cdb[6] = BMIC_FLUSH_CACHE;
 475                 put_unaligned_be16(cdb_length, &cdb[7]);
 476                 break;
 477         case BMIC_SENSE_DIAG_OPTIONS:
 478                 cdb_length = 0;
 479                 /* fall through */
 480         case BMIC_IDENTIFY_CONTROLLER:
 481         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 482                 request->data_direction = SOP_READ_FLAG;
 483                 cdb[0] = BMIC_READ;
 484                 cdb[6] = cmd;
 485                 put_unaligned_be16(cdb_length, &cdb[7]);
 486                 break;
 487         case BMIC_SET_DIAG_OPTIONS:
 488                 cdb_length = 0;
 489                 /* fall through */
 490         case BMIC_WRITE_HOST_WELLNESS:
 491                 request->data_direction = SOP_WRITE_FLAG;
 492                 cdb[0] = BMIC_WRITE;
 493                 cdb[6] = cmd;
 494                 put_unaligned_be16(cdb_length, &cdb[7]);
 495                 break;
 496         case BMIC_CSMI_PASSTHRU:
 497                 request->data_direction = SOP_BIDIRECTIONAL;
 498                 cdb[0] = BMIC_WRITE;
 499                 cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU;
 500                 cdb[6] = cmd;
 501                 put_unaligned_be16(cdb_length, &cdb[7]);
 502                 break;
 503         default:
 504                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n",
 505                         cmd);
 506                 break;
 507         }
 508
 509         switch (request->data_direction) {
 510         case SOP_READ_FLAG:
 511                 *dir = DMA_FROM_DEVICE;
 512                 break;
 513         case SOP_WRITE_FLAG:
 514                 *dir = DMA_TO_DEVICE;
 515                 break;
 516         case SOP_NO_DIRECTION_FLAG:
 517                 *dir = DMA_NONE;
 518                 break;
 519         default:
 520                 *dir = DMA_BIDIRECTIONAL;
 521                 break;
 522         }
 523
 524         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 525                 buffer, buffer_length, *dir);
 526 }
 527
 528 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 529 {
 530         io_request->scmd = NULL;
 531         io_request->status = 0;
 532         io_request->error_info = NULL;
 533         io_request->raid_bypass = false;
 534 }
 535
 536 static struct pqi_io_request *pqi_alloc_io_request(
 537         struct pqi_ctrl_info *ctrl_info)
 538 {
 539         struct pqi_io_request *io_request;
 540         u16 i = ctrl_info->next_io_request_slot;        /* benignly racy */
 541
 542         while (1) {
 543                 io_request = &ctrl_info->io_request_pool[i];
 544                 if (atomic_inc_return(&io_request->refcount) == 1)
 545                         break;
 546                 atomic_dec(&io_request->refcount);
 547                 i = (i + 1) % ctrl_info->max_io_slots;
 548         }
 549
 550         /* benignly racy */
 551         ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 552
 553         pqi_reinit_io_request(io_request);
 554
 555         return io_request;
 556 }
 557
 558 static void pqi_free_io_request(struct pqi_io_request *io_request)
 559 {
 560         atomic_dec(&io_request->refcount);
 561 }
 562
 563 static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 564                 u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page,
 565                 struct pqi_raid_error_info *error_info,
 566                 unsigned long timeout_msecs)
 567 {
 568         int rc;
 569         enum dma_data_direction dir;
 570         struct pqi_raid_path_request request;
 571
 572         rc = pqi_build_raid_path_request(ctrl_info, &request,
 573                 cmd, scsi3addr, buffer,
 574                 buffer_length, vpd_page, &dir);
 575         if (rc)
 576                 return rc;
 577
 578         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 579                  0, error_info, timeout_msecs);
 580
 581         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 582         return rc;
 583 }
 584
 585 /* Helper functions for pqi_send_scsi_raid_request */
 586
 587 static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info,
 588                 u8 cmd, void *buffer, size_t buffer_length)
 589 {
 590         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 591                         buffer, buffer_length, 0, NULL, NO_TIMEOUT);
 592 }
 593
 594 static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info,
 595                 u8 cmd, void *buffer, size_t buffer_length,
 596                 struct pqi_raid_error_info *error_info)
 597 {
 598         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 599                         buffer, buffer_length, 0, error_info, NO_TIMEOUT);
 600 }
 601
 602
 603 static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 604                 struct bmic_identify_controller *buffer)
 605 {
 606         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER,
 607                         buffer, sizeof(*buffer));
 608 }
 609
 610 static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 611         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 612 {
 613         return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr,
 614                 buffer, buffer_length, vpd_page, NULL, NO_TIMEOUT);
 615 }
 616
 617 static bool pqi_vpd_page_supported(struct pqi_ctrl_info *ctrl_info,
 618         u8 *scsi3addr, u16 vpd_page)
 619 {
 620         int rc;
 621         int i;
 622         int pages;
 623         unsigned char *buf, bufsize;
 624
 625         buf = kzalloc(256, GFP_KERNEL);
 626         if (!buf)
 627                 return false;
 628
 629         /* Get the size of the page list first */
 630         rc = pqi_scsi_inquiry(ctrl_info, scsi3addr,
 631                                 VPD_PAGE | SCSI_VPD_SUPPORTED_PAGES,
 632                                 buf, SCSI_VPD_HEADER_SZ);
 633         if (rc != 0)
 634                 goto exit_unsupported;
 635
 636         pages = buf[3];
 637         if ((pages + SCSI_VPD_HEADER_SZ) <= 255)
 638                 bufsize = pages + SCSI_VPD_HEADER_SZ;
 639         else
 640                 bufsize = 255;
 641
 642         /* Get the whole VPD page list */
 643         rc = pqi_scsi_inquiry(ctrl_info, scsi3addr,
 644                                 VPD_PAGE | SCSI_VPD_SUPPORTED_PAGES,
 645                                 buf, bufsize);
 646         if (rc != 0)
 647                 goto exit_unsupported;
 648
 649         pages = buf[3];
 650         for (i = 1; i <= pages; i++)
 651                 if (buf[3 + i] == vpd_page)
 652                         goto exit_supported;
 653
 654 exit_unsupported:
 655         kfree(buf);
 656         return false;
 657
 658 exit_supported:
 659         kfree(buf);
 660         return true;
 661 }
 662
 663 static int pqi_get_device_id(struct pqi_ctrl_info *ctrl_info,
 664         u8 *scsi3addr, u8 *device_id, int buflen)
 665 {
 666         int rc;
 667         unsigned char *buf;
 668
 669         if (!pqi_vpd_page_supported(ctrl_info, scsi3addr, SCSI_VPD_DEVICE_ID))
 670                 return 1; /* function not supported */
 671
 672         buf = kzalloc(64, GFP_KERNEL);
 673         if (!buf)
 674                 return -ENOMEM;
 675
 676         rc = pqi_scsi_inquiry(ctrl_info, scsi3addr,
 677                                 VPD_PAGE | SCSI_VPD_DEVICE_ID,
 678                                 buf, 64);
 679         if (rc == 0) {
 680                 if (buflen > 16)
 681                         buflen = 16;
 682                 memcpy(device_id, &buf[SCSI_VPD_DEVICE_ID_IDX], buflen);
 683         }
 684
 685         kfree(buf);
 686
 687         return rc;
 688 }
 689
 690 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 691         struct pqi_scsi_dev *device,
 692         struct bmic_identify_physical_device *buffer,
 693         size_t buffer_length)
 694 {
 695         int rc;
 696         enum dma_data_direction dir;
 697         u16 bmic_device_index;
 698         struct pqi_raid_path_request request;
 699
 700         rc = pqi_build_raid_path_request(ctrl_info, &request,
 701                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 702                 buffer_length, 0, &dir);
 703         if (rc)
 704                 return rc;
 705
 706         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 707         request.cdb[2] = (u8)bmic_device_index;
 708         request.cdb[9] = (u8)(bmic_device_index >> 8);
 709
 710         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 711                 0, NULL, NO_TIMEOUT);
 712
 713         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 714         return rc;
 715 }
 716
 717 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 718         enum bmic_flush_cache_shutdown_event shutdown_event)
 719 {
 720         int rc;
 721         struct bmic_flush_cache *flush_cache;
 722
 723         /*
 724          * Don't bother trying to flush the cache if the controller is
 725          * locked up.
 726          */
 727         if (pqi_ctrl_offline(ctrl_info))
 728                 return -ENXIO;
 729
 730         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 731         if (!flush_cache)
 732                 return -ENOMEM;
 733
 734         flush_cache->shutdown_event = shutdown_event;
 735
 736         rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache,
 737                 sizeof(*flush_cache));
 738
 739         kfree(flush_cache);
 740
 741         return rc;
 742 }
 743
 744 int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info,
 745         struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length,
 746         struct pqi_raid_error_info *error_info)
 747 {
 748         return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU,
 749                 buffer, buffer_length, error_info);
 750 }
 751
 752 #define PQI_FETCH_PTRAID_DATA (1UL<<31)
 753
 754 static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info)
 755 {
 756         int rc;
 757         struct bmic_diag_options *diag;
 758
 759         diag = kzalloc(sizeof(*diag), GFP_KERNEL);
 760         if (!diag)
 761                 return -ENOMEM;
 762
 763         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS,
 764                                         diag, sizeof(*diag));
 765         if (rc)
 766                 goto out;
 767
 768         diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA);
 769
 770         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS,
 771                                         diag, sizeof(*diag));
 772 out:
 773         kfree(diag);
 774
 775         return rc;
 776 }
 777
 778 static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 779         void *buffer, size_t buffer_length)
 780 {
 781         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS,
 782                                         buffer, buffer_length);
 783 }
 784
 785 #pragma pack(1)
 786
 787 struct bmic_host_wellness_driver_version {
 788         u8      start_tag[4];
 789         u8      driver_version_tag[2];
 790         __le16  driver_version_length;
 791         char    driver_version[32];
 792         u8      dont_write_tag[2];
 793         u8      end_tag[2];
 794 };
 795
 796 #pragma pack()
 797
 798 static int pqi_write_driver_version_to_host_wellness(
 799         struct pqi_ctrl_info *ctrl_info)
 800 {
 801         int rc;
 802         struct bmic_host_wellness_driver_version *buffer;
 803         size_t buffer_length;
 804
 805         buffer_length = sizeof(*buffer);
 806
 807         buffer = kmalloc(buffer_length, GFP_KERNEL);
 808         if (!buffer)
 809                 return -ENOMEM;
 810
 811         buffer->start_tag[0] = '<';
 812         buffer->start_tag[1] = 'H';
 813         buffer->start_tag[2] = 'W';
 814         buffer->start_tag[3] = '>';
 815         buffer->driver_version_tag[0] = 'D';
 816         buffer->driver_version_tag[1] = 'V';
 817         put_unaligned_le16(sizeof(buffer->driver_version),
 818                 &buffer->driver_version_length);
 819         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 820                 sizeof(buffer->driver_version) - 1);
 821         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 822         buffer->dont_write_tag[0] = 'D';
 823         buffer->dont_write_tag[1] = 'W';
 824         buffer->end_tag[0] = 'Z';
 825         buffer->end_tag[1] = 'Z';
 826
 827         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 828
 829         kfree(buffer);
 830
 831         return rc;
 832 }
 833
 834 #pragma pack(1)
 835
 836 struct bmic_host_wellness_time {
 837         u8      start_tag[4];
 838         u8      time_tag[2];
 839         __le16  time_length;
 840         u8      time[8];
 841         u8      dont_write_tag[2];
 842         u8      end_tag[2];
 843 };
 844
 845 #pragma pack()
 846
 847 static int pqi_write_current_time_to_host_wellness(
 848         struct pqi_ctrl_info *ctrl_info)
 849 {
 850         int rc;
 851         struct bmic_host_wellness_time *buffer;
 852         size_t buffer_length;
 853         time64_t local_time;
 854         unsigned int year;
 855         struct tm tm;
 856
 857         buffer_length = sizeof(*buffer);
 858
 859         buffer = kmalloc(buffer_length, GFP_KERNEL);
 860         if (!buffer)
 861                 return -ENOMEM;
 862
 863         buffer->start_tag[0] = '<';
 864         buffer->start_tag[1] = 'H';
 865         buffer->start_tag[2] = 'W';
 866         buffer->start_tag[3] = '>';
 867         buffer->time_tag[0] = 'T';
 868         buffer->time_tag[1] = 'D';
 869         put_unaligned_le16(sizeof(buffer->time),
 870                 &buffer->time_length);
 871
 872         local_time = ktime_get_real_seconds();
 873         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
 874         year = tm.tm_year + 1900;
 875
 876         buffer->time[0] = bin2bcd(tm.tm_hour);
 877         buffer->time[1] = bin2bcd(tm.tm_min);
 878         buffer->time[2] = bin2bcd(tm.tm_sec);
 879         buffer->time[3] = 0;
 880         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
 881         buffer->time[5] = bin2bcd(tm.tm_mday);
 882         buffer->time[6] = bin2bcd(year / 100);
 883         buffer->time[7] = bin2bcd(year % 100);
 884
 885         buffer->dont_write_tag[0] = 'D';
 886         buffer->dont_write_tag[1] = 'W';
 887         buffer->end_tag[0] = 'Z';
 888         buffer->end_tag[1] = 'Z';
 889
 890         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 891
 892         kfree(buffer);
 893
 894         return rc;
 895 }
 896
 897 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * PQI_HZ)
 898
 899 static void pqi_update_time_worker(struct work_struct *work)
 900 {
 901         int rc;
 902         struct pqi_ctrl_info *ctrl_info;
 903
 904         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
 905                 update_time_work);
 906
 907         if (pqi_ctrl_offline(ctrl_info))
 908                 return;
 909
 910         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
 911         if (rc)
 912                 dev_warn(&ctrl_info->pci_dev->dev,
 913                         "error updating time on controller\n");
 914
 915         schedule_delayed_work(&ctrl_info->update_time_work,
 916                 PQI_UPDATE_TIME_WORK_INTERVAL);
 917 }
 918
 919 static inline void pqi_schedule_update_time_worker(
 920         struct pqi_ctrl_info *ctrl_info)
 921 {
 922         schedule_delayed_work(&ctrl_info->update_time_work, 0);
 923 }
 924
 925 static inline void pqi_cancel_update_time_worker(
 926         struct pqi_ctrl_info *ctrl_info)
 927 {
 928         cancel_delayed_work_sync(&ctrl_info->update_time_work);
 929 }
 930
 931 static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 932         void *buffer, size_t buffer_length)
 933 {
 934         return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer,
 935                                         buffer_length);
 936 }
 937
 938 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 939         void **buffer)
 940 {
 941         int rc;
 942         size_t lun_list_length;
 943         size_t lun_data_length;
 944         size_t new_lun_list_length;
 945         void *lun_data = NULL;
 946         struct report_lun_header *report_lun_header;
 947
 948         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
 949         if (!report_lun_header) {
 950                 rc = -ENOMEM;
 951                 goto out;
 952         }
 953
 954         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
 955                 sizeof(*report_lun_header));
 956         if (rc)
 957                 goto out;
 958
 959         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
 960
 961 again:
 962         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
 963
 964         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
 965         if (!lun_data) {
 966                 rc = -ENOMEM;
 967                 goto out;
 968         }
 969
 970         if (lun_list_length == 0) {
 971                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
 972                 goto out;
 973         }
 974
 975         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
 976         if (rc)
 977                 goto out;
 978
 979         new_lun_list_length = get_unaligned_be32(
 980                 &((struct report_lun_header *)lun_data)->list_length);
 981
 982         if (new_lun_list_length > lun_list_length) {
 983                 lun_list_length = new_lun_list_length;
 984                 kfree(lun_data);
 985                 goto again;
 986         }
 987
 988 out:
 989         kfree(report_lun_header);
 990
 991         if (rc) {
 992                 kfree(lun_data);
 993                 lun_data = NULL;
 994         }
 995
 996         *buffer = lun_data;
 997
 998         return rc;
 999 }
1000
1001 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
1002         void **buffer)
1003 {
1004         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
1005                 buffer);
1006 }
1007
1008 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
1009         void **buffer)
1010 {
1011         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
1012 }
1013
1014 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
1015         struct report_phys_lun_extended **physdev_list,
1016         struct report_log_lun_extended **logdev_list)
1017 {
1018         int rc;
1019         size_t logdev_list_length;
1020         size_t logdev_data_length;
1021         struct report_log_lun_extended *internal_logdev_list;
1022         struct report_log_lun_extended *logdev_data;
1023         struct report_lun_header report_lun_header;
1024
1025         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
1026         if (rc)
1027                 dev_err(&ctrl_info->pci_dev->dev,
1028                         "report physical LUNs failed\n");
1029
1030         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
1031         if (rc)
1032                 dev_err(&ctrl_info->pci_dev->dev,
1033                         "report logical LUNs failed\n");
1034
1035         /*
1036          * Tack the controller itself onto the end of the logical device list.
1037          */
1038
1039         logdev_data = *logdev_list;
1040
1041         if (logdev_data) {
1042                 logdev_list_length =
1043                         get_unaligned_be32(&logdev_data->header.list_length);
1044         } else {
1045                 memset(&report_lun_header, 0, sizeof(report_lun_header));
1046                 logdev_data =
1047                         (struct report_log_lun_extended *)&report_lun_header;
1048                 logdev_list_length = 0;
1049         }
1050
1051         logdev_data_length = sizeof(struct report_lun_header) +
1052                 logdev_list_length;
1053
1054         internal_logdev_list = kmalloc(logdev_data_length +
1055                 sizeof(struct report_log_lun_extended), GFP_KERNEL);
1056         if (!internal_logdev_list) {
1057                 kfree(*logdev_list);
1058                 *logdev_list = NULL;
1059                 return -ENOMEM;
1060         }
1061
1062         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
1063         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
1064                 sizeof(struct report_log_lun_extended_entry));
1065         put_unaligned_be32(logdev_list_length +
1066                 sizeof(struct report_log_lun_extended_entry),
1067                 &internal_logdev_list->header.list_length);
1068
1069         kfree(*logdev_list);
1070         *logdev_list = internal_logdev_list;
1071
1072         return 0;
1073 }
1074
1075 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
1076         int bus, int target, int lun)
1077 {
1078         device->bus = bus;
1079         device->target = target;
1080         device->lun = lun;
1081 }
1082
1083 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
1084 {
1085         u8 *scsi3addr;
1086         u32 lunid;
1087         int bus;
1088         int target;
1089         int lun;
1090
1091         scsi3addr = device->scsi3addr;
1092         lunid = get_unaligned_le32(scsi3addr);
1093
1094         if (pqi_is_hba_lunid(scsi3addr)) {
1095                 /* The specified device is the controller. */
1096                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
1097                 device->target_lun_valid = true;
1098                 return;
1099         }
1100
1101         if (pqi_is_logical_device(device)) {
1102                 if (device->is_external_raid_device) {
1103                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
1104                         target = (lunid >> 16) & 0x3fff;
1105                         lun = lunid & 0xff;
1106                 } else {
1107                         bus = PQI_RAID_VOLUME_BUS;
1108                         target = 0;
1109                         lun = lunid & 0x3fff;
1110                 }
1111                 pqi_set_bus_target_lun(device, bus, target, lun);
1112                 device->target_lun_valid = true;
1113                 return;
1114         }
1115
1116         /*
1117          * Defer target and LUN assignment for non-controller physical devices
1118          * because the SAS transport layer will make these assignments later.
1119          */
1120         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
1121 }
1122
1123 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
1124         struct pqi_scsi_dev *device)
1125 {
1126         int rc;
1127         u8 raid_level;
1128         u8 *buffer;
1129
1130         raid_level = SA_RAID_UNKNOWN;
1131
1132         buffer = kmalloc(64, GFP_KERNEL);
1133         if (buffer) {
1134                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1135                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1136                 if (rc == 0) {
1137                         raid_level = buffer[8];
1138                         if (raid_level > SA_RAID_MAX)
1139                                 raid_level = SA_RAID_UNKNOWN;
1140                 }
1141                 kfree(buffer);
1142         }
1143
1144         device->raid_level = raid_level;
1145 }
1146
1147 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1148         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1149 {
1150         char *err_msg;
1151         u32 raid_map_size;
1152         u32 r5or6_blocks_per_row;
1153
1154         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1155
1156         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1157                 err_msg = "RAID map too small";
1158                 goto bad_raid_map;
1159         }
1160
1161         if (device->raid_level == SA_RAID_1) {
1162                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1163                         err_msg = "invalid RAID-1 map";
1164                         goto bad_raid_map;
1165                 }
1166         } else if (device->raid_level == SA_RAID_ADM) {
1167                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1168                         err_msg = "invalid RAID-1(ADM) map";
1169                         goto bad_raid_map;
1170                 }
1171         } else if ((device->raid_level == SA_RAID_5 ||
1172                 device->raid_level == SA_RAID_6) &&
1173                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1174                 /* RAID 50/60 */
1175                 r5or6_blocks_per_row =
1176                         get_unaligned_le16(&raid_map->strip_size) *
1177                         get_unaligned_le16(&raid_map->data_disks_per_row);
1178                 if (r5or6_blocks_per_row == 0) {
1179                         err_msg = "invalid RAID-5 or RAID-6 map";
1180                         goto bad_raid_map;
1181                 }
1182         }
1183
1184         return 0;
1185
1186 bad_raid_map:
1187         dev_warn(&ctrl_info->pci_dev->dev,
1188                 "logical device %08x%08x %s\n",
1189                 *((u32 *)&device->scsi3addr),
1190                 *((u32 *)&device->scsi3addr[4]), err_msg);
1191
1192         return -EINVAL;
1193 }
1194
1195 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1196         struct pqi_scsi_dev *device)
1197 {
1198         int rc;
1199         u32 raid_map_size;
1200         struct raid_map *raid_map;
1201
1202         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1203         if (!raid_map)
1204                 return -ENOMEM;
1205
1206         rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1207                 device->scsi3addr, raid_map, sizeof(*raid_map),
1208                 0, NULL, NO_TIMEOUT);
1209
1210         if (rc)
1211                 goto error;
1212
1213         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1214
1215         if (raid_map_size > sizeof(*raid_map)) {
1216
1217                 kfree(raid_map);
1218
1219                 raid_map = kmalloc(raid_map_size, GFP_KERNEL);
1220                 if (!raid_map)
1221                         return -ENOMEM;
1222
1223                 rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1224                         device->scsi3addr, raid_map, raid_map_size,
1225                         0, NULL, NO_TIMEOUT);
1226                 if (rc)
1227                         goto error;
1228
1229                 if (get_unaligned_le32(&raid_map->structure_size)
1230                         != raid_map_size) {
1231                         dev_warn(&ctrl_info->pci_dev->dev,
1232                                 "Requested %d bytes, received %d bytes",
1233                                 raid_map_size,
1234                                 get_unaligned_le32(&raid_map->structure_size));
1235                         goto error;
1236                 }
1237         }
1238
1239         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1240         if (rc)
1241                 goto error;
1242
1243         device->raid_map = raid_map;
1244
1245         return 0;
1246
1247 error:
1248         kfree(raid_map);
1249
1250         return rc;
1251 }
1252
1253 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1254         struct pqi_scsi_dev *device)
1255 {
1256         int rc;
1257         u8 *buffer;
1258         u8 bypass_status;
1259
1260         buffer = kmalloc(64, GFP_KERNEL);
1261         if (!buffer)
1262                 return;
1263
1264         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1265                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1266         if (rc)
1267                 goto out;
1268
1269 #define RAID_BYPASS_STATUS      4
1270 #define RAID_BYPASS_CONFIGURED  0x1
1271 #define RAID_BYPASS_ENABLED     0x2
1272
1273         bypass_status = buffer[RAID_BYPASS_STATUS];
1274         device->raid_bypass_configured =
1275                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1276         if (device->raid_bypass_configured &&
1277                 (bypass_status & RAID_BYPASS_ENABLED) &&
1278                 pqi_get_raid_map(ctrl_info, device) == 0)
1279                 device->raid_bypass_enabled = true;
1280
1281 out:
1282         kfree(buffer);
1283 }
1284
1285 /*
1286  * Use vendor-specific VPD to determine online/offline status of a volume.
1287  */
1288
1289 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1290         struct pqi_scsi_dev *device)
1291 {
1292         int rc;
1293         size_t page_length;
1294         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1295         bool volume_offline = true;
1296         u32 volume_flags;
1297         struct ciss_vpd_logical_volume_status *vpd;
1298
1299         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1300         if (!vpd)
1301                 goto no_buffer;
1302
1303         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1304                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1305         if (rc)
1306                 goto out;
1307
1308         if (vpd->page_code != CISS_VPD_LV_STATUS)
1309                 goto out;
1310
1311         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1312                 volume_status) + vpd->page_length;
1313         if (page_length < sizeof(*vpd))
1314                 goto out;
1315
1316         volume_status = vpd->volume_status;
1317         volume_flags = get_unaligned_be32(&vpd->flags);
1318         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1319
1320 out:
1321         kfree(vpd);
1322 no_buffer:
1323         device->volume_status = volume_status;
1324         device->volume_offline = volume_offline;
1325 }
1326
1327 #define PQI_INQUIRY_PAGE0_RETRIES       3
1328
1329 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1330         struct pqi_scsi_dev *device)
1331 {
1332         int rc;
1333         u8 *buffer;
1334         unsigned int retries;
1335
1336         if (device->is_expander_smp_device)
1337                 return 0;
1338
1339         buffer = kmalloc(64, GFP_KERNEL);
1340         if (!buffer)
1341                 return -ENOMEM;
1342
1343         /* Send an inquiry to the device to see what it is. */
1344         for (retries = 0;;) {
1345                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0,
1346                         buffer, 64);
1347                 if (rc == 0)
1348                         break;
1349                 if (pqi_is_logical_device(device) ||
1350                         rc != PQI_CMD_STATUS_ABORTED ||
1351                         ++retries > PQI_INQUIRY_PAGE0_RETRIES)
1352                         goto out;
1353         }
1354
1355         scsi_sanitize_inquiry_string(&buffer[8], 8);
1356         scsi_sanitize_inquiry_string(&buffer[16], 16);
1357
1358         device->devtype = buffer[0] & 0x1f;
1359         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1360         memcpy(device->model, &buffer[16], sizeof(device->model));
1361
1362         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
1363                 if (device->is_external_raid_device) {
1364                         device->raid_level = SA_RAID_UNKNOWN;
1365                         device->volume_status = CISS_LV_OK;
1366                         device->volume_offline = false;
1367                 } else {
1368                         pqi_get_raid_level(ctrl_info, device);
1369                         pqi_get_raid_bypass_status(ctrl_info, device);
1370                         pqi_get_volume_status(ctrl_info, device);
1371                 }
1372         }
1373
1374         if (pqi_get_device_id(ctrl_info, device->scsi3addr,
1375                 device->unique_id, sizeof(device->unique_id)) < 0)
1376                 dev_warn(&ctrl_info->pci_dev->dev,
1377                         "Can't get device id for scsi %d:%d:%d:%d\n",
1378                         ctrl_info->scsi_host->host_no,
1379                         device->bus, device->target,
1380                         device->lun);
1381
1382 out:
1383         kfree(buffer);
1384
1385         return rc;
1386 }
1387
1388 static void pqi_get_physical_disk_info(struct pqi_ctrl_info *ctrl_info,
1389         struct pqi_scsi_dev *device,
1390         struct bmic_identify_physical_device *id_phys)
1391 {
1392         int rc;
1393
1394         memset(id_phys, 0, sizeof(*id_phys));
1395
1396         rc = pqi_identify_physical_device(ctrl_info, device,
1397                 id_phys, sizeof(*id_phys));
1398         if (rc) {
1399                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1400                 return;
1401         }
1402
1403         device->queue_depth =
1404                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1405         device->device_type = id_phys->device_type;
1406         device->active_path_index = id_phys->active_path_number;
1407         device->path_map = id_phys->redundant_path_present_map;
1408         memcpy(&device->box,
1409                 &id_phys->alternate_paths_phys_box_on_port,
1410                 sizeof(device->box));
1411         memcpy(&device->phys_connector,
1412                 &id_phys->alternate_paths_phys_connector,
1413                 sizeof(device->phys_connector));
1414         device->bay = id_phys->phys_bay_in_box;
1415 }
1416
1417 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1418         struct pqi_scsi_dev *device)
1419 {
1420         char *status;
1421         static const char unknown_state_str[] =
1422                 "Volume is in an unknown state (%u)";
1423         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1424
1425         switch (device->volume_status) {
1426         case CISS_LV_OK:
1427                 status = "Volume online";
1428                 break;
1429         case CISS_LV_FAILED:
1430                 status = "Volume failed";
1431                 break;
1432         case CISS_LV_NOT_CONFIGURED:
1433                 status = "Volume not configured";
1434                 break;
1435         case CISS_LV_DEGRADED:
1436                 status = "Volume degraded";
1437                 break;
1438         case CISS_LV_READY_FOR_RECOVERY:
1439                 status = "Volume ready for recovery operation";
1440                 break;
1441         case CISS_LV_UNDERGOING_RECOVERY:
1442                 status = "Volume undergoing recovery";
1443                 break;
1444         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1445                 status = "Wrong physical drive was replaced";
1446                 break;
1447         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1448                 status = "A physical drive not properly connected";
1449                 break;
1450         case CISS_LV_HARDWARE_OVERHEATING:
1451                 status = "Hardware is overheating";
1452                 break;
1453         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1454                 status = "Hardware has overheated";
1455                 break;
1456         case CISS_LV_UNDERGOING_EXPANSION:
1457                 status = "Volume undergoing expansion";
1458                 break;
1459         case CISS_LV_NOT_AVAILABLE:
1460                 status = "Volume waiting for transforming volume";
1461                 break;
1462         case CISS_LV_QUEUED_FOR_EXPANSION:
1463                 status = "Volume queued for expansion";
1464                 break;
1465         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1466                 status = "Volume disabled due to SCSI ID conflict";
1467                 break;
1468         case CISS_LV_EJECTED:
1469                 status = "Volume has been ejected";
1470                 break;
1471         case CISS_LV_UNDERGOING_ERASE:
1472                 status = "Volume undergoing background erase";
1473                 break;
1474         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1475                 status = "Volume ready for predictive spare rebuild";
1476                 break;
1477         case CISS_LV_UNDERGOING_RPI:
1478                 status = "Volume undergoing rapid parity initialization";
1479                 break;
1480         case CISS_LV_PENDING_RPI:
1481                 status = "Volume queued for rapid parity initialization";
1482                 break;
1483         case CISS_LV_ENCRYPTED_NO_KEY:
1484                 status = "Encrypted volume inaccessible - key not present";
1485                 break;
1486         case CISS_LV_UNDERGOING_ENCRYPTION:
1487                 status = "Volume undergoing encryption process";
1488                 break;
1489         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1490                 status = "Volume undergoing encryption re-keying process";
1491                 break;
1492         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1493                 status = "Volume encrypted but encryption is disabled";
1494                 break;
1495         case CISS_LV_PENDING_ENCRYPTION:
1496                 status = "Volume pending migration to encrypted state";
1497                 break;
1498         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1499                 status = "Volume pending encryption rekeying";
1500                 break;
1501         case CISS_LV_NOT_SUPPORTED:
1502                 status = "Volume not supported on this controller";
1503                 break;
1504         case CISS_LV_STATUS_UNAVAILABLE:
1505                 status = "Volume status not available";
1506                 break;
1507         default:
1508                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1509                         unknown_state_str, device->volume_status);
1510                 status = unknown_state_buffer;
1511                 break;
1512         }
1513
1514         dev_info(&ctrl_info->pci_dev->dev,
1515                 "scsi %d:%d:%d:%d %s\n",
1516                 ctrl_info->scsi_host->host_no,
1517                 device->bus, device->target, device->lun, status);
1518 }
1519
1520 static void pqi_rescan_worker(struct work_struct *work)
1521 {
1522         struct pqi_ctrl_info *ctrl_info;
1523
1524         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1525                 rescan_work);
1526
1527         pqi_scan_scsi_devices(ctrl_info);
1528 }
1529
1530 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1531         struct pqi_scsi_dev *device)
1532 {
1533         int rc;
1534
1535         if (pqi_is_logical_device(device))
1536                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1537                         device->target, device->lun);
1538         else
1539                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1540
1541         return rc;
1542 }
1543
1544 #define PQI_PENDING_IO_TIMEOUT_SECS     20
1545
1546 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
1547         struct pqi_scsi_dev *device)
1548 {
1549         int rc;
1550
1551         pqi_device_remove_start(device);
1552
1553         rc = pqi_device_wait_for_pending_io(ctrl_info, device,
1554                 PQI_PENDING_IO_TIMEOUT_SECS);
1555         if (rc)
1556                 dev_err(&ctrl_info->pci_dev->dev,
1557                         "scsi %d:%d:%d:%d removing device with %d outstanding commands\n",
1558                         ctrl_info->scsi_host->host_no, device->bus,
1559                         device->target, device->lun,
1560                         atomic_read(&device->scsi_cmds_outstanding));
1561
1562         if (pqi_is_logical_device(device))
1563                 scsi_remove_device(device->sdev);
1564         else
1565                 pqi_remove_sas_device(device);
1566 }
1567
1568 /* Assumes the SCSI device list lock is held. */
1569
1570 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1571         int bus, int target, int lun)
1572 {
1573         struct pqi_scsi_dev *device;
1574
1575         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1576                 scsi_device_list_entry)
1577                 if (device->bus == bus && device->target == target &&
1578                         device->lun == lun)
1579                         return device;
1580
1581         return NULL;
1582 }
1583
1584 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1,
1585         struct pqi_scsi_dev *dev2)
1586 {
1587         if (dev1->is_physical_device != dev2->is_physical_device)
1588                 return false;
1589
1590         if (dev1->is_physical_device)
1591                 return dev1->wwid == dev2->wwid;
1592
1593         return memcmp(dev1->volume_id, dev2->volume_id,
1594                 sizeof(dev1->volume_id)) == 0;
1595 }
1596
1597 enum pqi_find_result {
1598         DEVICE_NOT_FOUND,
1599         DEVICE_CHANGED,
1600         DEVICE_SAME,
1601 };
1602
1603 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1604         struct pqi_scsi_dev *device_to_find,
1605         struct pqi_scsi_dev **matching_device)
1606 {
1607         struct pqi_scsi_dev *device;
1608
1609         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1610                 scsi_device_list_entry) {
1611                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr,
1612                         device->scsi3addr)) {
1613                         *matching_device = device;
1614                         if (pqi_device_equal(device_to_find, device)) {
1615                                 if (device_to_find->volume_offline)
1616                                         return DEVICE_CHANGED;
1617                                 return DEVICE_SAME;
1618                         }
1619                         return DEVICE_CHANGED;
1620                 }
1621         }
1622
1623         return DEVICE_NOT_FOUND;
1624 }
1625
1626 static inline const char *pqi_device_type(struct pqi_scsi_dev *device)
1627 {
1628         if (device->is_expander_smp_device)
1629                 return "Enclosure SMP    ";
1630
1631         return scsi_device_type(device->devtype);
1632 }
1633
1634 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1635
1636 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1637         char *action, struct pqi_scsi_dev *device)
1638 {
1639         ssize_t count;
1640         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1641
1642         count = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1643                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1644
1645         if (device->target_lun_valid)
1646                 count += snprintf(buffer + count,
1647                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1648                         "%d:%d",
1649                         device->target,
1650                         device->lun);
1651         else
1652                 count += snprintf(buffer + count,
1653                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1654                         "-:-");
1655
1656         if (pqi_is_logical_device(device))
1657                 count += snprintf(buffer + count,
1658                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1659                         " %08x%08x",
1660                         *((u32 *)&device->scsi3addr),
1661                         *((u32 *)&device->scsi3addr[4]));
1662         else
1663                 count += snprintf(buffer + count,
1664                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1665                         " %016llx", device->sas_address);
1666
1667         count += snprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1668                 " %s %.8s %.16s ",
1669                 pqi_device_type(device),
1670                 device->vendor,
1671                 device->model);
1672
1673         if (pqi_is_logical_device(device)) {
1674                 if (device->devtype == TYPE_DISK)
1675                         count += snprintf(buffer + count,
1676                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1677                                 "SSDSmartPathCap%c En%c %-12s",
1678                                 device->raid_bypass_configured ? '+' : '-',
1679                                 device->raid_bypass_enabled ? '+' : '-',
1680                                 pqi_raid_level_to_string(device->raid_level));
1681         } else {
1682                 count += snprintf(buffer + count,
1683                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1684                         "AIO%c", device->aio_enabled ? '+' : '-');
1685                 if (device->devtype == TYPE_DISK ||
1686                         device->devtype == TYPE_ZBC)
1687                         count += snprintf(buffer + count,
1688                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1689                                 " qd=%-6d", device->queue_depth);
1690         }
1691
1692         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
1693 }
1694
1695 /* Assumes the SCSI device list lock is held. */
1696
1697 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1698         struct pqi_scsi_dev *new_device)
1699 {
1700         existing_device->devtype = new_device->devtype;
1701         existing_device->device_type = new_device->device_type;
1702         existing_device->bus = new_device->bus;
1703         if (new_device->target_lun_valid) {
1704                 existing_device->target = new_device->target;
1705                 existing_device->lun = new_device->lun;
1706                 existing_device->target_lun_valid = true;
1707         }
1708
1709         /* By definition, the scsi3addr and wwid fields are already the same. */
1710
1711         existing_device->is_physical_device = new_device->is_physical_device;
1712         existing_device->is_external_raid_device =
1713                 new_device->is_external_raid_device;
1714         existing_device->is_expander_smp_device =
1715                 new_device->is_expander_smp_device;
1716         existing_device->aio_enabled = new_device->aio_enabled;
1717         memcpy(existing_device->vendor, new_device->vendor,
1718                 sizeof(existing_device->vendor));
1719         memcpy(existing_device->model, new_device->model,
1720                 sizeof(existing_device->model));
1721         existing_device->sas_address = new_device->sas_address;
1722         existing_device->raid_level = new_device->raid_level;
1723         existing_device->queue_depth = new_device->queue_depth;
1724         existing_device->aio_handle = new_device->aio_handle;
1725         existing_device->volume_status = new_device->volume_status;
1726         existing_device->active_path_index = new_device->active_path_index;
1727         existing_device->path_map = new_device->path_map;
1728         existing_device->bay = new_device->bay;
1729         memcpy(existing_device->box, new_device->box,
1730                 sizeof(existing_device->box));
1731         memcpy(existing_device->phys_connector, new_device->phys_connector,
1732                 sizeof(existing_device->phys_connector));
1733         existing_device->offload_to_mirror = 0;
1734         kfree(existing_device->raid_map);
1735         existing_device->raid_map = new_device->raid_map;
1736         existing_device->raid_bypass_configured =
1737                 new_device->raid_bypass_configured;
1738         existing_device->raid_bypass_enabled =
1739                 new_device->raid_bypass_enabled;
1740         existing_device->device_offline = false;
1741
1742         /* To prevent this from being freed later. */
1743         new_device->raid_map = NULL;
1744 }
1745
1746 static inline void pqi_free_device(struct pqi_scsi_dev *device)
1747 {
1748         if (device) {
1749                 kfree(device->raid_map);
1750                 kfree(device);
1751         }
1752 }
1753
1754 /*
1755  * Called when exposing a new device to the OS fails in order to re-adjust
1756  * our internal SCSI device list to match the SCSI ML's view.
1757  */
1758
1759 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1760         struct pqi_scsi_dev *device)
1761 {
1762         unsigned long flags;
1763
1764         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1765         list_del(&device->scsi_device_list_entry);
1766         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1767
1768         /* Allow the device structure to be freed later. */
1769         device->keep_device = false;
1770 }
1771
1772 static inline bool pqi_is_device_added(struct pqi_scsi_dev *device)
1773 {
1774         if (device->is_expander_smp_device)
1775                 return device->sas_port != NULL;
1776
1777         return device->sdev != NULL;
1778 }
1779
1780 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1781         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1782 {
1783         int rc;
1784         unsigned int i;
1785         unsigned long flags;
1786         enum pqi_find_result find_result;
1787         struct pqi_scsi_dev *device;
1788         struct pqi_scsi_dev *next;
1789         struct pqi_scsi_dev *matching_device;
1790         LIST_HEAD(add_list);
1791         LIST_HEAD(delete_list);
1792
1793         /*
1794          * The idea here is to do as little work as possible while holding the
1795          * spinlock.  That's why we go to great pains to defer anything other
1796          * than updating the internal device list until after we release the
1797          * spinlock.
1798          */
1799
1800         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1801
1802         /* Assume that all devices in the existing list have gone away. */
1803         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1804                 scsi_device_list_entry)
1805                 device->device_gone = true;
1806
1807         for (i = 0; i < num_new_devices; i++) {
1808                 device = new_device_list[i];
1809
1810                 find_result = pqi_scsi_find_entry(ctrl_info, device,
1811                                                 &matching_device);
1812
1813                 switch (find_result) {
1814                 case DEVICE_SAME:
1815                         /*
1816                          * The newly found device is already in the existing
1817                          * device list.
1818                          */
1819                         device->new_device = false;
1820                         matching_device->device_gone = false;
1821                         pqi_scsi_update_device(matching_device, device);
1822                         break;
1823                 case DEVICE_NOT_FOUND:
1824                         /*
1825                          * The newly found device is NOT in the existing device
1826                          * list.
1827                          */
1828                         device->new_device = true;
1829                         break;
1830                 case DEVICE_CHANGED:
1831                         /*
1832                          * The original device has gone away and we need to add
1833                          * the new device.
1834                          */
1835                         device->new_device = true;
1836                         break;
1837                 }
1838         }
1839
1840         /* Process all devices that have gone away. */
1841         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1842                 scsi_device_list_entry) {
1843                 if (device->device_gone) {
1844                         list_del(&device->scsi_device_list_entry);
1845                         list_add_tail(&device->delete_list_entry, &delete_list);
1846                 }
1847         }
1848
1849         /* Process all new devices. */
1850         for (i = 0; i < num_new_devices; i++) {
1851                 device = new_device_list[i];
1852                 if (!device->new_device)
1853                         continue;
1854                 if (device->volume_offline)
1855                         continue;
1856                 list_add_tail(&device->scsi_device_list_entry,
1857                         &ctrl_info->scsi_device_list);
1858                 list_add_tail(&device->add_list_entry, &add_list);
1859                 /* To prevent this device structure from being freed later. */
1860                 device->keep_device = true;
1861         }
1862
1863         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1864
1865         if (pqi_ctrl_in_ofa(ctrl_info))
1866                 pqi_ctrl_ofa_done(ctrl_info);
1867
1868         /* Remove all devices that have gone away. */
1869         list_for_each_entry_safe(device, next, &delete_list,
1870                 delete_list_entry) {
1871                 if (device->volume_offline) {
1872                         pqi_dev_info(ctrl_info, "offline", device);
1873                         pqi_show_volume_status(ctrl_info, device);
1874                 } else {
1875                         pqi_dev_info(ctrl_info, "removed", device);
1876                 }
1877                 if (pqi_is_device_added(device))
1878                         pqi_remove_device(ctrl_info, device);
1879                 list_del(&device->delete_list_entry);
1880                 pqi_free_device(device);
1881         }
1882
1883         /*
1884          * Notify the SCSI ML if the queue depth of any existing device has
1885          * changed.
1886          */
1887         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1888                 scsi_device_list_entry) {
1889                 if (device->sdev && device->queue_depth !=
1890                         device->advertised_queue_depth) {
1891                         device->advertised_queue_depth = device->queue_depth;
1892                         scsi_change_queue_depth(device->sdev,
1893                                 device->advertised_queue_depth);
1894                 }
1895         }
1896
1897         /* Expose any new devices. */
1898         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
1899                 if (!pqi_is_device_added(device)) {
1900                         pqi_dev_info(ctrl_info, "added", device);
1901                         rc = pqi_add_device(ctrl_info, device);
1902                         if (rc) {
1903                                 dev_warn(&ctrl_info->pci_dev->dev,
1904                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
1905                                         ctrl_info->scsi_host->host_no,
1906                                         device->bus, device->target,
1907                                         device->lun);
1908                                 pqi_fixup_botched_add(ctrl_info, device);
1909                         }
1910                 }
1911         }
1912 }
1913
1914 static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
1915 {
1916         bool is_supported;
1917
1918         if (device->is_expander_smp_device)
1919                 return true;
1920
1921         is_supported = false;
1922
1923         switch (device->devtype) {
1924         case TYPE_DISK:
1925         case TYPE_ZBC:
1926         case TYPE_TAPE:
1927         case TYPE_MEDIUM_CHANGER:
1928         case TYPE_ENCLOSURE:
1929                 is_supported = true;
1930                 break;
1931         case TYPE_RAID:
1932                 /*
1933                  * Only support the HBA controller itself as a RAID
1934                  * controller.  If it's a RAID controller other than
1935                  * the HBA itself (an external RAID controller, for
1936                  * example), we don't support it.
1937                  */
1938                 if (pqi_is_hba_lunid(device->scsi3addr))
1939                         is_supported = true;
1940                 break;
1941         }
1942
1943         return is_supported;
1944 }
1945
1946 static inline bool pqi_skip_device(u8 *scsi3addr)
1947 {
1948         /* Ignore all masked devices. */
1949         if (MASKED_DEVICE(scsi3addr))
1950                 return true;
1951
1952         return false;
1953 }
1954
1955 static inline bool pqi_is_device_with_sas_address(struct pqi_scsi_dev *device)
1956 {
1957         if (!device->is_physical_device)
1958                 return false;
1959
1960         if (device->is_expander_smp_device)
1961                 return true;
1962
1963         switch (device->devtype) {
1964         case TYPE_DISK:
1965         case TYPE_ZBC:
1966         case TYPE_ENCLOSURE:
1967                 return true;
1968         }
1969
1970         return false;
1971 }
1972
1973 static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
1974 {
1975         return !device->is_physical_device ||
1976                 !pqi_skip_device(device->scsi3addr);
1977 }
1978
1979 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1980 {
1981         int i;
1982         int rc;
1983         LIST_HEAD(new_device_list_head);
1984         struct report_phys_lun_extended *physdev_list = NULL;
1985         struct report_log_lun_extended *logdev_list = NULL;
1986         struct report_phys_lun_extended_entry *phys_lun_ext_entry;
1987         struct report_log_lun_extended_entry *log_lun_ext_entry;
1988         struct bmic_identify_physical_device *id_phys = NULL;
1989         u32 num_physicals;
1990         u32 num_logicals;
1991         struct pqi_scsi_dev **new_device_list = NULL;
1992         struct pqi_scsi_dev *device;
1993         struct pqi_scsi_dev *next;
1994         unsigned int num_new_devices;
1995         unsigned int num_valid_devices;
1996         bool is_physical_device;
1997         u8 *scsi3addr;
1998         static char *out_of_memory_msg =
1999                 "failed to allocate memory, device discovery stopped";
2000
2001         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
2002         if (rc)
2003                 goto out;
2004
2005         if (physdev_list)
2006                 num_physicals =
2007                         get_unaligned_be32(&physdev_list->header.list_length)
2008                                 / sizeof(physdev_list->lun_entries[0]);
2009         else
2010                 num_physicals = 0;
2011
2012         if (logdev_list)
2013                 num_logicals =
2014                         get_unaligned_be32(&logdev_list->header.list_length)
2015                                 / sizeof(logdev_list->lun_entries[0]);
2016         else
2017                 num_logicals = 0;
2018
2019         if (num_physicals) {
2020                 /*
2021                  * We need this buffer for calls to pqi_get_physical_disk_info()
2022                  * below.  We allocate it here instead of inside
2023                  * pqi_get_physical_disk_info() because it's a fairly large
2024                  * buffer.
2025                  */
2026                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
2027                 if (!id_phys) {
2028                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2029                                 out_of_memory_msg);
2030                         rc = -ENOMEM;
2031                         goto out;
2032                 }
2033         }
2034
2035         num_new_devices = num_physicals + num_logicals;
2036
2037         new_device_list = kmalloc_array(num_new_devices,
2038                                         sizeof(*new_device_list),
2039                                         GFP_KERNEL);
2040         if (!new_device_list) {
2041                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
2042                 rc = -ENOMEM;
2043                 goto out;
2044         }
2045
2046         for (i = 0; i < num_new_devices; i++) {
2047                 device = kzalloc(sizeof(*device), GFP_KERNEL);
2048                 if (!device) {
2049                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2050                                 out_of_memory_msg);
2051                         rc = -ENOMEM;
2052                         goto out;
2053                 }
2054                 list_add_tail(&device->new_device_list_entry,
2055                         &new_device_list_head);
2056         }
2057
2058         device = NULL;
2059         num_valid_devices = 0;
2060
2061         for (i = 0; i < num_new_devices; i++) {
2062
2063                 if (i < num_physicals) {
2064                         is_physical_device = true;
2065                         phys_lun_ext_entry = &physdev_list->lun_entries[i];
2066                         log_lun_ext_entry = NULL;
2067                         scsi3addr = phys_lun_ext_entry->lunid;
2068                 } else {
2069                         is_physical_device = false;
2070                         phys_lun_ext_entry = NULL;
2071                         log_lun_ext_entry =
2072                                 &logdev_list->lun_entries[i - num_physicals];
2073                         scsi3addr = log_lun_ext_entry->lunid;
2074                 }
2075
2076                 if (is_physical_device && pqi_skip_device(scsi3addr))
2077                         continue;
2078
2079                 if (device)
2080                         device = list_next_entry(device, new_device_list_entry);
2081                 else
2082                         device = list_first_entry(&new_device_list_head,
2083                                 struct pqi_scsi_dev, new_device_list_entry);
2084
2085                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
2086                 device->is_physical_device = is_physical_device;
2087                 if (is_physical_device) {
2088                         if (phys_lun_ext_entry->device_type ==
2089                                 SA_EXPANDER_SMP_DEVICE)
2090                                 device->is_expander_smp_device = true;
2091                 } else {
2092                         device->is_external_raid_device =
2093                                 pqi_is_external_raid_addr(scsi3addr);
2094                 }
2095
2096                 /* Gather information about the device. */
2097                 rc = pqi_get_device_info(ctrl_info, device);
2098                 if (rc == -ENOMEM) {
2099                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2100                                 out_of_memory_msg);
2101                         goto out;
2102                 }
2103                 if (rc) {
2104                         if (device->is_physical_device)
2105                                 dev_warn(&ctrl_info->pci_dev->dev,
2106                                         "obtaining device info failed, skipping physical device %016llx\n",
2107                                         get_unaligned_be64(
2108                                                 &phys_lun_ext_entry->wwid));
2109                         else
2110                                 dev_warn(&ctrl_info->pci_dev->dev,
2111                                         "obtaining device info failed, skipping logical device %08x%08x\n",
2112                                         *((u32 *)&device->scsi3addr),
2113                                         *((u32 *)&device->scsi3addr[4]));
2114                         rc = 0;
2115                         continue;
2116                 }
2117
2118                 if (!pqi_is_supported_device(device))
2119                         continue;
2120
2121                 pqi_assign_bus_target_lun(device);
2122
2123                 if (device->is_physical_device) {
2124                         device->wwid = phys_lun_ext_entry->wwid;
2125                         if ((phys_lun_ext_entry->device_flags &
2126                                 REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
2127                                 phys_lun_ext_entry->aio_handle) {
2128                                 device->aio_enabled = true;
2129                                         device->aio_handle =
2130                                                 phys_lun_ext_entry->aio_handle;
2131                         }
2132                         if (device->devtype == TYPE_DISK ||
2133                                 device->devtype == TYPE_ZBC) {
2134                                 pqi_get_physical_disk_info(ctrl_info,
2135                                         device, id_phys);
2136                         }
2137                 } else {
2138                         memcpy(device->volume_id, log_lun_ext_entry->volume_id,
2139                                 sizeof(device->volume_id));
2140                 }
2141
2142                 if (pqi_is_device_with_sas_address(device))
2143                         device->sas_address = get_unaligned_be64(&device->wwid);
2144
2145                 new_device_list[num_valid_devices++] = device;
2146         }
2147
2148         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
2149
2150 out:
2151         list_for_each_entry_safe(device, next, &new_device_list_head,
2152                 new_device_list_entry) {
2153                 if (device->keep_device)
2154                         continue;
2155                 list_del(&device->new_device_list_entry);
2156                 pqi_free_device(device);
2157         }
2158
2159         kfree(new_device_list);
2160         kfree(physdev_list);
2161         kfree(logdev_list);
2162         kfree(id_phys);
2163
2164         return rc;
2165 }
2166
2167 static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2168 {
2169         unsigned long flags;
2170         struct pqi_scsi_dev *device;
2171
2172         while (1) {
2173                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2174
2175                 device = list_first_entry_or_null(&ctrl_info->scsi_device_list,
2176                         struct pqi_scsi_dev, scsi_device_list_entry);
2177                 if (device)
2178                         list_del(&device->scsi_device_list_entry);
2179
2180                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
2181                         flags);
2182
2183                 if (!device)
2184                         break;
2185
2186                 if (pqi_is_device_added(device))
2187                         pqi_remove_device(ctrl_info, device);
2188                 pqi_free_device(device);
2189         }
2190 }
2191
2192 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2193 {
2194         int rc;
2195
2196         if (pqi_ctrl_offline(ctrl_info))
2197                 return -ENXIO;
2198
2199         mutex_lock(&ctrl_info->scan_mutex);
2200
2201         rc = pqi_update_scsi_devices(ctrl_info);
2202         if (rc)
2203                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2204
2205         mutex_unlock(&ctrl_info->scan_mutex);
2206
2207         return rc;
2208 }
2209
2210 static void pqi_scan_start(struct Scsi_Host *shost)
2211 {
2212         struct pqi_ctrl_info *ctrl_info;
2213
2214         ctrl_info = shost_to_hba(shost);
2215         if (pqi_ctrl_in_ofa(ctrl_info))
2216                 return;
2217
2218         pqi_scan_scsi_devices(ctrl_info);
2219 }
2220
2221 /* Returns TRUE if scan is finished. */
2222
2223 static int pqi_scan_finished(struct Scsi_Host *shost,
2224         unsigned long elapsed_time)
2225 {
2226         struct pqi_ctrl_info *ctrl_info;
2227
2228         ctrl_info = shost_priv(shost);
2229
2230         return !mutex_is_locked(&ctrl_info->scan_mutex);
2231 }
2232
2233 static void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info)
2234 {
2235         mutex_lock(&ctrl_info->scan_mutex);
2236         mutex_unlock(&ctrl_info->scan_mutex);
2237 }
2238
2239 static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info)
2240 {
2241         mutex_lock(&ctrl_info->lun_reset_mutex);
2242         mutex_unlock(&ctrl_info->lun_reset_mutex);
2243 }
2244
2245 static void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info)
2246 {
2247         mutex_lock(&ctrl_info->ofa_mutex);
2248         mutex_unlock(&ctrl_info->ofa_mutex);
2249 }
2250
2251 static inline void pqi_set_encryption_info(
2252         struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
2253         u64 first_block)
2254 {
2255         u32 volume_blk_size;
2256
2257         /*
2258          * Set the encryption tweak values based on logical block address.
2259          * If the block size is 512, the tweak value is equal to the LBA.
2260          * For other block sizes, tweak value is (LBA * block size) / 512.
2261          */
2262         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2263         if (volume_blk_size != 512)
2264                 first_block = (first_block * volume_blk_size) / 512;
2265
2266         encryption_info->data_encryption_key_index =
2267                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2268         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2269         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2270 }
2271
2272 /*
2273  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2274  */
2275
2276 #define PQI_RAID_BYPASS_INELIGIBLE      1
2277
2278 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2279         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2280         struct pqi_queue_group *queue_group)
2281 {
2282         struct raid_map *raid_map;
2283         bool is_write = false;
2284         u32 map_index;
2285         u64 first_block;
2286         u64 last_block;
2287         u32 block_cnt;
2288         u32 blocks_per_row;
2289         u64 first_row;
2290         u64 last_row;
2291         u32 first_row_offset;
2292         u32 last_row_offset;
2293         u32 first_column;
2294         u32 last_column;
2295         u64 r0_first_row;
2296         u64 r0_last_row;
2297         u32 r5or6_blocks_per_row;
2298         u64 r5or6_first_row;
2299         u64 r5or6_last_row;
2300         u32 r5or6_first_row_offset;
2301         u32 r5or6_last_row_offset;
2302         u32 r5or6_first_column;
2303         u32 r5or6_last_column;
2304         u16 data_disks_per_row;
2305         u32 total_disks_per_row;
2306         u16 layout_map_count;
2307         u32 stripesize;
2308         u16 strip_size;
2309         u32 first_group;
2310         u32 last_group;
2311         u32 current_group;
2312         u32 map_row;
2313         u32 aio_handle;
2314         u64 disk_block;
2315         u32 disk_block_cnt;
2316         u8 cdb[16];
2317         u8 cdb_length;
2318         int offload_to_mirror;
2319         struct pqi_encryption_info *encryption_info_ptr;
2320         struct pqi_encryption_info encryption_info;
2321 #if BITS_PER_LONG == 32
2322         u64 tmpdiv;
2323 #endif
2324
2325         /* Check for valid opcode, get LBA and block count. */
2326         switch (scmd->cmnd[0]) {
2327         case WRITE_6:
2328                 is_write = true;
2329                 /* fall through */
2330         case READ_6:
2331                 first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2332                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2333                 block_cnt = (u32)scmd->cmnd[4];
2334                 if (block_cnt == 0)
2335                         block_cnt = 256;
2336                 break;
2337         case WRITE_10:
2338                 is_write = true;
2339                 /* fall through */
2340         case READ_10:
2341                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2342                 block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2343                 break;
2344         case WRITE_12:
2345                 is_write = true;
2346                 /* fall through */
2347         case READ_12:
2348                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2349                 block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2350                 break;
2351         case WRITE_16:
2352                 is_write = true;
2353                 /* fall through */
2354         case READ_16:
2355                 first_block = get_unaligned_be64(&scmd->cmnd[2]);
2356                 block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2357                 break;
2358         default:
2359                 /* Process via normal I/O path. */
2360                 return PQI_RAID_BYPASS_INELIGIBLE;
2361         }
2362
2363         /* Check for write to non-RAID-0. */
2364         if (is_write && device->raid_level != SA_RAID_0)
2365                 return PQI_RAID_BYPASS_INELIGIBLE;
2366
2367         if (unlikely(block_cnt == 0))
2368                 return PQI_RAID_BYPASS_INELIGIBLE;
2369
2370         last_block = first_block + block_cnt - 1;
2371         raid_map = device->raid_map;
2372
2373         /* Check for invalid block or wraparound. */
2374         if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2375                 last_block < first_block)
2376                 return PQI_RAID_BYPASS_INELIGIBLE;
2377
2378         data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
2379         strip_size = get_unaligned_le16(&raid_map->strip_size);
2380         layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2381
2382         /* Calculate stripe information for the request. */
2383         blocks_per_row = data_disks_per_row * strip_size;
2384 #if BITS_PER_LONG == 32
2385         tmpdiv = first_block;
2386         do_div(tmpdiv, blocks_per_row);
2387         first_row = tmpdiv;
2388         tmpdiv = last_block;
2389         do_div(tmpdiv, blocks_per_row);
2390         last_row = tmpdiv;
2391         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2392         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2393         tmpdiv = first_row_offset;
2394         do_div(tmpdiv, strip_size);
2395         first_column = tmpdiv;
2396         tmpdiv = last_row_offset;
2397         do_div(tmpdiv, strip_size);
2398         last_column = tmpdiv;
2399 #else
2400         first_row = first_block / blocks_per_row;
2401         last_row = last_block / blocks_per_row;
2402         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2403         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2404         first_column = first_row_offset / strip_size;
2405         last_column = last_row_offset / strip_size;
2406 #endif
2407
2408         /* If this isn't a single row/column then give to the controller. */
2409         if (first_row != last_row || first_column != last_column)
2410                 return PQI_RAID_BYPASS_INELIGIBLE;
2411
2412         /* Proceeding with driver mapping. */
2413         total_disks_per_row = data_disks_per_row +
2414                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2415         map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2416                 get_unaligned_le16(&raid_map->row_cnt);
2417         map_index = (map_row * total_disks_per_row) + first_column;
2418
2419         /* RAID 1 */
2420         if (device->raid_level == SA_RAID_1) {
2421                 if (device->offload_to_mirror)
2422                         map_index += data_disks_per_row;
2423                 device->offload_to_mirror = !device->offload_to_mirror;
2424         } else if (device->raid_level == SA_RAID_ADM) {
2425                 /* RAID ADM */
2426                 /*
2427                  * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
2428                  * divisible by 3.
2429                  */
2430                 offload_to_mirror = device->offload_to_mirror;
2431                 if (offload_to_mirror == 0)  {
2432                         /* use physical disk in the first mirrored group. */
2433                         map_index %= data_disks_per_row;
2434                 } else {
2435                         do {
2436                                 /*
2437                                  * Determine mirror group that map_index
2438                                  * indicates.
2439                                  */
2440                                 current_group = map_index / data_disks_per_row;
2441
2442                                 if (offload_to_mirror != current_group) {
2443                                         if (current_group <
2444                                                 layout_map_count - 1) {
2445                                                 /*
2446                                                  * Select raid index from
2447                                                  * next group.
2448                                                  */
2449                                                 map_index += data_disks_per_row;
2450                                                 current_group++;
2451                                         } else {
2452                                                 /*
2453                                                  * Select raid index from first
2454                                                  * group.
2455                                                  */
2456                                                 map_index %= data_disks_per_row;
2457                                                 current_group = 0;
2458                                         }
2459                                 }
2460                         } while (offload_to_mirror != current_group);
2461                 }
2462
2463                 /* Set mirror group to use next time. */
2464                 offload_to_mirror =
2465                         (offload_to_mirror >= layout_map_count - 1) ?
2466                                 0 : offload_to_mirror + 1;
2467                 WARN_ON(offload_to_mirror >= layout_map_count);
2468                 device->offload_to_mirror = offload_to_mirror;
2469                 /*
2470                  * Avoid direct use of device->offload_to_mirror within this
2471                  * function since multiple threads might simultaneously
2472                  * increment it beyond the range of device->layout_map_count -1.
2473                  */
2474         } else if ((device->raid_level == SA_RAID_5 ||
2475                 device->raid_level == SA_RAID_6) && layout_map_count > 1) {
2476                 /* RAID 50/60 */
2477                 /* Verify first and last block are in same RAID group */
2478                 r5or6_blocks_per_row = strip_size * data_disks_per_row;
2479                 stripesize = r5or6_blocks_per_row * layout_map_count;
2480 #if BITS_PER_LONG == 32
2481                 tmpdiv = first_block;
2482                 first_group = do_div(tmpdiv, stripesize);
2483                 tmpdiv = first_group;
2484                 do_div(tmpdiv, r5or6_blocks_per_row);
2485                 first_group = tmpdiv;
2486                 tmpdiv = last_block;
2487                 last_group = do_div(tmpdiv, stripesize);
2488                 tmpdiv = last_group;
2489                 do_div(tmpdiv, r5or6_blocks_per_row);
2490                 last_group = tmpdiv;
2491 #else
2492                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
2493                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
2494 #endif
2495                 if (first_group != last_group)
2496                         return PQI_RAID_BYPASS_INELIGIBLE;
2497
2498                 /* Verify request is in a single row of RAID 5/6 */
2499 #if BITS_PER_LONG == 32
2500                 tmpdiv = first_block;
2501                 do_div(tmpdiv, stripesize);
2502                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
2503                 tmpdiv = last_block;
2504                 do_div(tmpdiv, stripesize);
2505                 r5or6_last_row = r0_last_row = tmpdiv;
2506 #else
2507                 first_row = r5or6_first_row = r0_first_row =
2508                         first_block / stripesize;
2509                 r5or6_last_row = r0_last_row = last_block / stripesize;
2510 #endif
2511                 if (r5or6_first_row != r5or6_last_row)
2512                         return PQI_RAID_BYPASS_INELIGIBLE;
2513
2514                 /* Verify request is in a single column */
2515 #if BITS_PER_LONG == 32
2516                 tmpdiv = first_block;
2517                 first_row_offset = do_div(tmpdiv, stripesize);
2518                 tmpdiv = first_row_offset;
2519                 first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
2520                 r5or6_first_row_offset = first_row_offset;
2521                 tmpdiv = last_block;
2522                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
2523                 tmpdiv = r5or6_last_row_offset;
2524                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
2525                 tmpdiv = r5or6_first_row_offset;
2526                 do_div(tmpdiv, strip_size);
2527                 first_column = r5or6_first_column = tmpdiv;
2528                 tmpdiv = r5or6_last_row_offset;
2529                 do_div(tmpdiv, strip_size);
2530                 r5or6_last_column = tmpdiv;
2531 #else
2532                 first_row_offset = r5or6_first_row_offset =
2533                         (u32)((first_block % stripesize) %
2534                         r5or6_blocks_per_row);
2535
2536                 r5or6_last_row_offset =
2537                         (u32)((last_block % stripesize) %
2538                         r5or6_blocks_per_row);
2539
2540                 first_column = r5or6_first_row_offset / strip_size;
2541                 r5or6_first_column = first_column;
2542                 r5or6_last_column = r5or6_last_row_offset / strip_size;
2543 #endif
2544                 if (r5or6_first_column != r5or6_last_column)
2545                         return PQI_RAID_BYPASS_INELIGIBLE;
2546
2547                 /* Request is eligible */
2548                 map_row =
2549                         ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2550                         get_unaligned_le16(&raid_map->row_cnt);
2551
2552                 map_index = (first_group *
2553                         (get_unaligned_le16(&raid_map->row_cnt) *
2554                         total_disks_per_row)) +
2555                         (map_row * total_disks_per_row) + first_column;
2556         }
2557
2558         aio_handle = raid_map->disk_data[map_index].aio_handle;
2559         disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2560                 first_row * strip_size +
2561                 (first_row_offset - first_column * strip_size);
2562         disk_block_cnt = block_cnt;
2563
2564         /* Handle differing logical/physical block sizes. */
2565         if (raid_map->phys_blk_shift) {
2566                 disk_block <<= raid_map->phys_blk_shift;
2567                 disk_block_cnt <<= raid_map->phys_blk_shift;
2568         }
2569
2570         if (unlikely(disk_block_cnt > 0xffff))
2571                 return PQI_RAID_BYPASS_INELIGIBLE;
2572
2573         /* Build the new CDB for the physical disk I/O. */
2574         if (disk_block > 0xffffffff) {
2575                 cdb[0] = is_write ? WRITE_16 : READ_16;
2576                 cdb[1] = 0;
2577                 put_unaligned_be64(disk_block, &cdb[2]);
2578                 put_unaligned_be32(disk_block_cnt, &cdb[10]);
2579                 cdb[14] = 0;
2580                 cdb[15] = 0;
2581                 cdb_length = 16;
2582         } else {
2583                 cdb[0] = is_write ? WRITE_10 : READ_10;
2584                 cdb[1] = 0;
2585                 put_unaligned_be32((u32)disk_block, &cdb[2]);
2586                 cdb[6] = 0;
2587                 put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
2588                 cdb[9] = 0;
2589                 cdb_length = 10;
2590         }
2591
2592         if (get_unaligned_le16(&raid_map->flags) &
2593                 RAID_MAP_ENCRYPTION_ENABLED) {
2594                 pqi_set_encryption_info(&encryption_info, raid_map,
2595                         first_block);
2596                 encryption_info_ptr = &encryption_info;
2597         } else {
2598                 encryption_info_ptr = NULL;
2599         }
2600
2601         return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
2602                 cdb, cdb_length, queue_group, encryption_info_ptr, true);
2603 }
2604
2605 #define PQI_STATUS_IDLE         0x0
2606
2607 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
2608 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
2609
2610 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
2611 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
2612 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
2613 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
2614 #define PQI_DEVICE_STATE_ERROR                          0x4
2615
2616 #define PQI_MODE_READY_TIMEOUT_SECS             30
2617 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
2618
2619 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2620 {
2621         struct pqi_device_registers __iomem *pqi_registers;
2622         unsigned long timeout;
2623         u64 signature;
2624         u8 status;
2625
2626         pqi_registers = ctrl_info->pqi_registers;
2627         timeout = (PQI_MODE_READY_TIMEOUT_SECS * PQI_HZ) + jiffies;
2628
2629         while (1) {
2630                 signature = readq(&pqi_registers->signature);
2631                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2632                         sizeof(signature)) == 0)
2633                         break;
2634                 if (time_after(jiffies, timeout)) {
2635                         dev_err(&ctrl_info->pci_dev->dev,
2636                                 "timed out waiting for PQI signature\n");
2637                         return -ETIMEDOUT;
2638                 }
2639                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2640         }
2641
2642         while (1) {
2643                 status = readb(&pqi_registers->function_and_status_code);
2644                 if (status == PQI_STATUS_IDLE)
2645                         break;
2646                 if (time_after(jiffies, timeout)) {
2647                         dev_err(&ctrl_info->pci_dev->dev,
2648                                 "timed out waiting for PQI IDLE\n");
2649                         return -ETIMEDOUT;
2650                 }
2651                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2652         }
2653
2654         while (1) {
2655                 if (readl(&pqi_registers->device_status) ==
2656                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2657                         break;
2658                 if (time_after(jiffies, timeout)) {
2659                         dev_err(&ctrl_info->pci_dev->dev,
2660                                 "timed out waiting for PQI all registers ready\n");
2661                         return -ETIMEDOUT;
2662                 }
2663                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2664         }
2665
2666         return 0;
2667 }
2668
2669 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2670 {
2671         struct pqi_scsi_dev *device;
2672
2673         device = io_request->scmd->device->hostdata;
2674         device->raid_bypass_enabled = false;
2675         device->aio_enabled = false;
2676 }
2677
2678 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
2679 {
2680         struct pqi_ctrl_info *ctrl_info;
2681         struct pqi_scsi_dev *device;
2682
2683         device = sdev->hostdata;
2684         if (device->device_offline)
2685                 return;
2686
2687         device->device_offline = true;
2688         ctrl_info = shost_to_hba(sdev->host);
2689         pqi_schedule_rescan_worker(ctrl_info);
2690         dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n",
2691                 path, ctrl_info->scsi_host->host_no, device->bus,
2692                 device->target, device->lun);
2693 }
2694
2695 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2696 {
2697         u8 scsi_status;
2698         u8 host_byte;
2699         struct scsi_cmnd *scmd;
2700         struct pqi_raid_error_info *error_info;
2701         size_t sense_data_length;
2702         int residual_count;
2703         int xfer_count;
2704         struct scsi_sense_hdr sshdr;
2705
2706         scmd = io_request->scmd;
2707         if (!scmd)
2708                 return;
2709
2710         error_info = io_request->error_info;
2711         scsi_status = error_info->status;
2712         host_byte = DID_OK;
2713
2714         switch (error_info->data_out_result) {
2715         case PQI_DATA_IN_OUT_GOOD:
2716                 break;
2717         case PQI_DATA_IN_OUT_UNDERFLOW:
2718                 xfer_count =
2719                         get_unaligned_le32(&error_info->data_out_transferred);
2720                 residual_count = scsi_bufflen(scmd) - xfer_count;
2721                 scsi_set_resid(scmd, residual_count);
2722                 if (xfer_count < scmd->underflow)
2723                         host_byte = DID_SOFT_ERROR;
2724                 break;
2725         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
2726         case PQI_DATA_IN_OUT_ABORTED:
2727                 host_byte = DID_ABORT;
2728                 break;
2729         case PQI_DATA_IN_OUT_TIMEOUT:
2730                 host_byte = DID_TIME_OUT;
2731                 break;
2732         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
2733         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
2734         case PQI_DATA_IN_OUT_BUFFER_ERROR:
2735         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
2736         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
2737         case PQI_DATA_IN_OUT_ERROR:
2738         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
2739         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
2740         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
2741         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
2742         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
2743         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
2744         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
2745         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
2746         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
2747         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
2748         default:
2749                 host_byte = DID_ERROR;
2750                 break;
2751         }
2752
2753         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2754         if (sense_data_length == 0)
2755                 sense_data_length =
2756                         get_unaligned_le16(&error_info->response_data_length);
2757         if (sense_data_length) {
2758                 if (sense_data_length > sizeof(error_info->data))
2759                         sense_data_length = sizeof(error_info->data);
2760
2761                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
2762                         scsi_normalize_sense(error_info->data,
2763                                 sense_data_length, &sshdr) &&
2764                                 sshdr.sense_key == HARDWARE_ERROR &&
2765                                 sshdr.asc == 0x3e &&
2766                                 sshdr.ascq == 0x1) {
2767                         pqi_take_device_offline(scmd->device, "RAID");
2768                         host_byte = DID_NO_CONNECT;
2769                 }
2770
2771                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2772                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
2773                 memcpy(scmd->sense_buffer, error_info->data,
2774                         sense_data_length);
2775         }
2776
2777         scmd->result = scsi_status;
2778         set_host_byte(scmd, host_byte);
2779 }
2780
2781 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
2782 {
2783         u8 scsi_status;
2784         u8 host_byte;
2785         struct scsi_cmnd *scmd;
2786         struct pqi_aio_error_info *error_info;
2787         size_t sense_data_length;
2788         int residual_count;
2789         int xfer_count;
2790         bool device_offline;
2791
2792         scmd = io_request->scmd;
2793         error_info = io_request->error_info;
2794         host_byte = DID_OK;
2795         sense_data_length = 0;
2796         device_offline = false;
2797
2798         switch (error_info->service_response) {
2799         case PQI_AIO_SERV_RESPONSE_COMPLETE:
2800                 scsi_status = error_info->status;
2801                 break;
2802         case PQI_AIO_SERV_RESPONSE_FAILURE:
2803                 switch (error_info->status) {
2804                 case PQI_AIO_STATUS_IO_ABORTED:
2805                         scsi_status = SAM_STAT_TASK_ABORTED;
2806                         break;
2807                 case PQI_AIO_STATUS_UNDERRUN:
2808                         scsi_status = SAM_STAT_GOOD;
2809                         residual_count = get_unaligned_le32(
2810                                                 &error_info->residual_count);
2811                         scsi_set_resid(scmd, residual_count);
2812                         xfer_count = scsi_bufflen(scmd) - residual_count;
2813                         if (xfer_count < scmd->underflow)
2814                                 host_byte = DID_SOFT_ERROR;
2815                         break;
2816                 case PQI_AIO_STATUS_OVERRUN:
2817                         scsi_status = SAM_STAT_GOOD;
2818                         break;
2819                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
2820                         pqi_aio_path_disabled(io_request);
2821                         scsi_status = SAM_STAT_GOOD;
2822                         io_request->status = -EAGAIN;
2823                         break;
2824                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
2825                 case PQI_AIO_STATUS_INVALID_DEVICE:
2826                         if (!io_request->raid_bypass) {
2827                                 device_offline = true;
2828                                 pqi_take_device_offline(scmd->device, "AIO");
2829                                 host_byte = DID_NO_CONNECT;
2830                         }
2831                         scsi_status = SAM_STAT_CHECK_CONDITION;
2832                         break;
2833                 case PQI_AIO_STATUS_IO_ERROR:
2834                 default:
2835                         scsi_status = SAM_STAT_CHECK_CONDITION;
2836                         break;
2837                 }
2838                 break;
2839         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
2840         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
2841                 scsi_status = SAM_STAT_GOOD;
2842                 break;
2843         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
2844         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
2845         default:
2846                 scsi_status = SAM_STAT_CHECK_CONDITION;
2847                 break;
2848         }
2849
2850         if (error_info->data_present) {
2851                 sense_data_length =
2852                         get_unaligned_le16(&error_info->data_length);
2853                 if (sense_data_length) {
2854                         if (sense_data_length > sizeof(error_info->data))
2855                                 sense_data_length = sizeof(error_info->data);
2856                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2857                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
2858                         memcpy(scmd->sense_buffer, error_info->data,
2859                                 sense_data_length);
2860                 }
2861         }
2862
2863         if (device_offline && sense_data_length == 0)
2864                 scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR,
2865                         0x3e, 0x1);
2866
2867         scmd->result = scsi_status;
2868         set_host_byte(scmd, host_byte);
2869 }
2870
2871 static void pqi_process_io_error(unsigned int iu_type,
2872         struct pqi_io_request *io_request)
2873 {
2874         switch (iu_type) {
2875         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2876                 pqi_process_raid_io_error(io_request);
2877                 break;
2878         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2879                 pqi_process_aio_io_error(io_request);
2880                 break;
2881         }
2882 }
2883
2884 static int pqi_interpret_task_management_response(
2885         struct pqi_task_management_response *response)
2886 {
2887         int rc;
2888
2889         switch (response->response_code) {
2890         case SOP_TMF_COMPLETE:
2891         case SOP_TMF_FUNCTION_SUCCEEDED:
2892                 rc = 0;
2893                 break;
2894         case SOP_TMF_REJECTED:
2895                 rc = -EAGAIN;
2896                 break;
2897         default:
2898                 rc = -EIO;
2899                 break;
2900         }
2901
2902         return rc;
2903 }
2904
2905 static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
2906         struct pqi_queue_group *queue_group)
2907 {
2908         unsigned int num_responses;
2909         pqi_index_t oq_pi;
2910         pqi_index_t oq_ci;
2911         struct pqi_io_request *io_request;
2912         struct pqi_io_response *response;
2913         u16 request_id;
2914
2915         num_responses = 0;
2916         oq_ci = queue_group->oq_ci_copy;
2917
2918         while (1) {
2919                 oq_pi = readl(queue_group->oq_pi);
2920                 if (oq_pi == oq_ci)
2921                         break;
2922
2923                 num_responses++;
2924                 response = queue_group->oq_element_array +
2925                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
2926
2927                 request_id = get_unaligned_le16(&response->request_id);
2928                 WARN_ON(request_id >= ctrl_info->max_io_slots);
2929
2930                 io_request = &ctrl_info->io_request_pool[request_id];
2931                 WARN_ON(atomic_read(&io_request->refcount) == 0);
2932
2933                 switch (response->header.iu_type) {
2934                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
2935                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
2936                         if (io_request->scmd)
2937                                 io_request->scmd->result = 0;
2938                         /* fall through */
2939                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
2940                         break;
2941                 case PQI_RESPONSE_IU_VENDOR_GENERAL:
2942                         io_request->status =
2943                                 get_unaligned_le16(
2944                                 &((struct pqi_vendor_general_response *)
2945                                         response)->status);
2946                         break;
2947                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
2948                         io_request->status =
2949                                 pqi_interpret_task_management_response(
2950                                         (void *)response);
2951                         break;
2952                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
2953                         pqi_aio_path_disabled(io_request);
2954                         io_request->status = -EAGAIN;
2955                         break;
2956                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2957                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2958                         io_request->error_info = ctrl_info->error_buffer +
2959                                 (get_unaligned_le16(&response->error_index) *
2960                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
2961                         pqi_process_io_error(response->header.iu_type,
2962                                 io_request);
2963                         break;
2964                 default:
2965                         dev_err(&ctrl_info->pci_dev->dev,
2966                                 "unexpected IU type: 0x%x\n",
2967                                 response->header.iu_type);
2968                         break;
2969                 }
2970
2971                 io_request->io_complete_callback(io_request,
2972                         io_request->context);
2973
2974                 /*
2975                  * Note that the I/O request structure CANNOT BE TOUCHED after
2976                  * returning from the I/O completion callback!
2977                  */
2978
2979                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
2980         }
2981
2982         if (num_responses) {
2983                 queue_group->oq_ci_copy = oq_ci;
2984                 writel(oq_ci, queue_group->oq_ci);
2985         }
2986
2987         return num_responses;
2988 }
2989
2990 static inline unsigned int pqi_num_elements_free(unsigned int pi,
2991         unsigned int ci, unsigned int elements_in_queue)
2992 {
2993         unsigned int num_elements_used;
2994
2995         if (pi >= ci)
2996                 num_elements_used = pi - ci;
2997         else
2998                 num_elements_used = elements_in_queue - ci + pi;
2999
3000         return elements_in_queue - num_elements_used - 1;
3001 }
3002
3003 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
3004         struct pqi_event_acknowledge_request *iu, size_t iu_length)
3005 {
3006         pqi_index_t iq_pi;
3007         pqi_index_t iq_ci;
3008         unsigned long flags;
3009         void *next_element;
3010         struct pqi_queue_group *queue_group;
3011
3012         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
3013         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
3014
3015         while (1) {
3016                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
3017
3018                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
3019                 iq_ci = readl(queue_group->iq_ci[RAID_PATH]);
3020
3021                 if (pqi_num_elements_free(iq_pi, iq_ci,
3022                         ctrl_info->num_elements_per_iq))
3023                         break;
3024
3025                 spin_unlock_irqrestore(
3026                         &queue_group->submit_lock[RAID_PATH], flags);
3027
3028                 if (pqi_ctrl_offline(ctrl_info))
3029                         return;
3030         }
3031
3032         next_element = queue_group->iq_element_array[RAID_PATH] +
3033                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3034
3035         memcpy(next_element, iu, iu_length);
3036
3037         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
3038         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
3039
3040         /*
3041          * This write notifies the controller that an IU is available to be
3042          * processed.
3043          */
3044         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
3045
3046         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
3047 }
3048
3049 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
3050         struct pqi_event *event)
3051 {
3052         struct pqi_event_acknowledge_request request;
3053
3054         memset(&request, 0, sizeof(request));
3055
3056         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
3057         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
3058                 &request.header.iu_length);
3059         request.event_type = event->event_type;
3060         request.event_id = event->event_id;
3061         request.additional_event_id = event->additional_event_id;
3062
3063         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
3064 }
3065
3066 #define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS              30
3067 #define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS        1
3068
3069 static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status(
3070         struct pqi_ctrl_info *ctrl_info)
3071 {
3072         unsigned long timeout;
3073         u8 status;
3074
3075         timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * PQI_HZ) + jiffies;
3076
3077         while (1) {
3078                 status = pqi_read_soft_reset_status(ctrl_info);
3079                 if (status & PQI_SOFT_RESET_INITIATE)
3080                         return RESET_INITIATE_DRIVER;
3081
3082                 if (status & PQI_SOFT_RESET_ABORT)
3083                         return RESET_ABORT;
3084
3085                 if (time_after(jiffies, timeout)) {
3086                         dev_err(&ctrl_info->pci_dev->dev,
3087                                 "timed out waiting for soft reset status\n");
3088                         return RESET_TIMEDOUT;
3089                 }
3090
3091                 if (!sis_is_firmware_running(ctrl_info))
3092                         return RESET_NORESPONSE;
3093
3094                 ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS);
3095         }
3096 }
3097
3098 static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info,
3099                 enum pqi_soft_reset_status reset_status)
3100 {
3101         int rc;
3102
3103         switch (reset_status) {
3104         case RESET_INITIATE_DRIVER:
3105                 /* fall through */
3106         case RESET_TIMEDOUT:
3107                 dev_info(&ctrl_info->pci_dev->dev,
3108                         "resetting controller %u\n", ctrl_info->ctrl_id);
3109                 sis_soft_reset(ctrl_info);
3110                 /* fall through */
3111         case RESET_INITIATE_FIRMWARE:
3112                 rc = pqi_ofa_ctrl_restart(ctrl_info);
3113                 pqi_ofa_free_host_buffer(ctrl_info);
3114                 dev_info(&ctrl_info->pci_dev->dev,
3115                         "Online Firmware Activation for controller %u: %s\n",
3116                         ctrl_info->ctrl_id, rc == 0 ? "SUCCESS" : "FAILED");
3117                 break;
3118         case RESET_ABORT:
3119                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3120                 dev_info(&ctrl_info->pci_dev->dev,
3121                         "Online Firmware Activation for controller %u: %s\n",
3122                         ctrl_info->ctrl_id, "ABORTED");
3123                 break;
3124         case RESET_NORESPONSE:
3125                 pqi_ofa_free_host_buffer(ctrl_info);
3126                 pqi_take_ctrl_offline(ctrl_info);
3127                 break;
3128         }
3129 }
3130
3131 static void pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info,
3132         struct pqi_event *event)
3133 {
3134         u16 event_id;
3135         enum pqi_soft_reset_status status;
3136
3137         event_id = get_unaligned_le16(&event->event_id);
3138
3139         mutex_lock(&ctrl_info->ofa_mutex);
3140
3141         if (event_id == PQI_EVENT_OFA_QUIESCE) {
3142                 dev_info(&ctrl_info->pci_dev->dev,
3143                          "Received Online Firmware Activation quiesce event for controller %u\n",
3144                          ctrl_info->ctrl_id);
3145                 pqi_ofa_ctrl_quiesce(ctrl_info);
3146                 pqi_acknowledge_event(ctrl_info, event);
3147                 if (ctrl_info->soft_reset_handshake_supported) {
3148                         status = pqi_poll_for_soft_reset_status(ctrl_info);
3149                         pqi_process_soft_reset(ctrl_info, status);
3150                 } else {
3151                         pqi_process_soft_reset(ctrl_info,
3152                                         RESET_INITIATE_FIRMWARE);
3153                 }
3154
3155         } else if (event_id == PQI_EVENT_OFA_MEMORY_ALLOCATION) {
3156                 pqi_acknowledge_event(ctrl_info, event);
3157                 pqi_ofa_setup_host_buffer(ctrl_info,
3158                         le32_to_cpu(event->ofa_bytes_requested));
3159                 pqi_ofa_host_memory_update(ctrl_info);
3160         } else if (event_id == PQI_EVENT_OFA_CANCELLED) {
3161                 pqi_ofa_free_host_buffer(ctrl_info);
3162                 pqi_acknowledge_event(ctrl_info, event);
3163                 dev_info(&ctrl_info->pci_dev->dev,
3164                          "Online Firmware Activation(%u) cancel reason : %u\n",
3165                          ctrl_info->ctrl_id, event->ofa_cancel_reason);
3166         }
3167
3168         mutex_unlock(&ctrl_info->ofa_mutex);
3169 }
3170
3171 static void pqi_event_worker(struct work_struct *work)
3172 {
3173         unsigned int i;
3174         struct pqi_ctrl_info *ctrl_info;
3175         struct pqi_event *event;
3176
3177         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
3178
3179         pqi_ctrl_busy(ctrl_info);
3180         pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
3181         if (pqi_ctrl_offline(ctrl_info))
3182                 goto out;
3183
3184         pqi_schedule_rescan_worker_delayed(ctrl_info);
3185
3186         event = ctrl_info->events;
3187         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
3188                 if (event->pending) {
3189                         event->pending = false;
3190                         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3191                                 pqi_ctrl_unbusy(ctrl_info);
3192                                 pqi_ofa_process_event(ctrl_info, event);
3193                                 return;
3194                         }
3195                         pqi_acknowledge_event(ctrl_info, event);
3196                 }
3197                 event++;
3198         }
3199
3200 out:
3201         pqi_ctrl_unbusy(ctrl_info);
3202 }
3203
3204 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * PQI_HZ)
3205
3206 static void pqi_heartbeat_timer_handler(struct timer_list *t)
3207 {
3208         int num_interrupts;
3209         u32 heartbeat_count;
3210         struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t,
3211                                                      heartbeat_timer);
3212
3213         pqi_check_ctrl_health(ctrl_info);
3214         if (pqi_ctrl_offline(ctrl_info))
3215                 return;
3216
3217         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
3218         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
3219
3220         if (num_interrupts == ctrl_info->previous_num_interrupts) {
3221                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
3222                         dev_err(&ctrl_info->pci_dev->dev,
3223                                 "no heartbeat detected - last heartbeat count: %u\n",
3224                                 heartbeat_count);
3225                         pqi_take_ctrl_offline(ctrl_info);
3226                         return;
3227                 }
3228         } else {
3229                 ctrl_info->previous_num_interrupts = num_interrupts;
3230         }
3231
3232         ctrl_info->previous_heartbeat_count = heartbeat_count;
3233         mod_timer(&ctrl_info->heartbeat_timer,
3234                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
3235 }
3236
3237 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3238 {
3239         if (!ctrl_info->heartbeat_counter)
3240                 return;
3241
3242         ctrl_info->previous_num_interrupts =
3243                 atomic_read(&ctrl_info->num_interrupts);
3244         ctrl_info->previous_heartbeat_count =
3245                 pqi_read_heartbeat_counter(ctrl_info);
3246
3247         ctrl_info->heartbeat_timer.expires =
3248                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
3249         add_timer(&ctrl_info->heartbeat_timer);
3250 }
3251
3252 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3253 {
3254         del_timer_sync(&ctrl_info->heartbeat_timer);
3255 }
3256
3257 static inline int pqi_event_type_to_event_index(unsigned int event_type)
3258 {
3259         int index;
3260
3261         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
3262                 if (event_type == pqi_supported_event_types[index])
3263                         return index;
3264
3265         return -1;
3266 }
3267
3268 static inline bool pqi_is_supported_event(unsigned int event_type)
3269 {
3270         return pqi_event_type_to_event_index(event_type) != -1;
3271 }
3272
3273 static void pqi_ofa_capture_event_payload(struct pqi_event *event,
3274         struct pqi_event_response *response)
3275 {
3276         u16 event_id;
3277
3278         event_id = get_unaligned_le16(&event->event_id);
3279
3280         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3281                 if (event_id == PQI_EVENT_OFA_MEMORY_ALLOCATION) {
3282                         event->ofa_bytes_requested =
3283                         response->data.ofa_memory_allocation.bytes_requested;
3284                 } else if (event_id == PQI_EVENT_OFA_CANCELLED) {
3285                         event->ofa_cancel_reason =
3286                         response->data.ofa_cancelled.reason;
3287                 }
3288         }
3289 }
3290
3291 static unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
3292 {
3293         unsigned int num_events;
3294         pqi_index_t oq_pi;
3295         pqi_index_t oq_ci;
3296         struct pqi_event_queue *event_queue;
3297         struct pqi_event_response *response;
3298         struct pqi_event *event;
3299         int event_index;
3300
3301         event_queue = &ctrl_info->event_queue;
3302         num_events = 0;
3303         oq_ci = event_queue->oq_ci_copy;
3304
3305         while (1) {
3306                 oq_pi = readl(event_queue->oq_pi);
3307                 if (oq_pi == oq_ci)
3308                         break;
3309
3310                 num_events++;
3311                 response = event_queue->oq_element_array +
3312                         (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
3313
3314                 event_index =
3315                         pqi_event_type_to_event_index(response->event_type);
3316
3317                 if (event_index >= 0) {
3318                         if (response->request_acknowlege) {
3319                                 event = &ctrl_info->events[event_index];
3320                                 event->pending = true;
3321                                 event->event_type = response->event_type;
3322                                 event->event_id = response->event_id;
3323                                 event->additional_event_id =
3324                                         response->additional_event_id;
3325                                 pqi_ofa_capture_event_payload(event, response);
3326                         }
3327                 }
3328
3329                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
3330         }
3331
3332         if (num_events) {
3333                 event_queue->oq_ci_copy = oq_ci;
3334                 writel(oq_ci, event_queue->oq_ci);
3335                 schedule_work(&ctrl_info->event_work);
3336         }
3337
3338         return num_events;
3339 }
3340
3341 #define PQI_LEGACY_INTX_MASK    0x1
3342
3343 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info,
3344                                                 bool enable_intx)
3345 {
3346         u32 intx_mask;
3347         struct pqi_device_registers __iomem *pqi_registers;
3348         volatile void __iomem *register_addr;
3349
3350         pqi_registers = ctrl_info->pqi_registers;
3351
3352         if (enable_intx)
3353                 register_addr = &pqi_registers->legacy_intx_mask_clear;
3354         else
3355                 register_addr = &pqi_registers->legacy_intx_mask_set;
3356
3357         intx_mask = readl(register_addr);
3358         intx_mask |= PQI_LEGACY_INTX_MASK;
3359         writel(intx_mask, register_addr);
3360 }
3361
3362 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3363         enum pqi_irq_mode new_mode)
3364 {
3365         switch (ctrl_info->irq_mode) {
3366         case IRQ_MODE_MSIX:
3367                 switch (new_mode) {
3368                 case IRQ_MODE_MSIX:
3369                         break;
3370                 case IRQ_MODE_INTX:
3371                         pqi_configure_legacy_intx(ctrl_info, true);
3372                         sis_enable_intx(ctrl_info);
3373                         break;
3374                 case IRQ_MODE_NONE:
3375                         break;
3376                 }
3377                 break;
3378         case IRQ_MODE_INTX:
3379                 switch (new_mode) {
3380                 case IRQ_MODE_MSIX:
3381                         pqi_configure_legacy_intx(ctrl_info, false);
3382                         sis_enable_msix(ctrl_info);
3383                         break;
3384                 case IRQ_MODE_INTX:
3385                         break;
3386                 case IRQ_MODE_NONE:
3387                         pqi_configure_legacy_intx(ctrl_info, false);
3388                         break;
3389                 }
3390                 break;
3391         case IRQ_MODE_NONE:
3392                 switch (new_mode) {
3393                 case IRQ_MODE_MSIX:
3394                         sis_enable_msix(ctrl_info);
3395                         break;
3396                 case IRQ_MODE_INTX:
3397                         pqi_configure_legacy_intx(ctrl_info, true);
3398                         sis_enable_intx(ctrl_info);
3399                         break;
3400                 case IRQ_MODE_NONE:
3401                         break;
3402                 }
3403                 break;
3404         }
3405
3406         ctrl_info->irq_mode = new_mode;
3407 }
3408
3409 #define PQI_LEGACY_INTX_PENDING         0x1
3410
3411 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3412 {
3413         bool valid_irq;
3414         u32 intx_status;
3415
3416         switch (ctrl_info->irq_mode) {
3417         case IRQ_MODE_MSIX:
3418                 valid_irq = true;
3419                 break;
3420         case IRQ_MODE_INTX:
3421                 intx_status =
3422                         readl(&ctrl_info->pqi_registers->legacy_intx_status);
3423                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3424                         valid_irq = true;
3425                 else
3426                         valid_irq = false;
3427                 break;
3428         case IRQ_MODE_NONE:
3429         default:
3430                 valid_irq = false;
3431                 break;
3432         }
3433
3434         return valid_irq;
3435 }
3436
3437 static irqreturn_t pqi_irq_handler(int irq, void *data)
3438 {
3439         struct pqi_ctrl_info *ctrl_info;
3440         struct pqi_queue_group *queue_group;
3441         unsigned int num_responses_handled;
3442
3443         queue_group = data;
3444         ctrl_info = queue_group->ctrl_info;
3445
3446         if (!pqi_is_valid_irq(ctrl_info))
3447                 return IRQ_NONE;
3448
3449         num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3450
3451         if (irq == ctrl_info->event_irq)
3452                 num_responses_handled += pqi_process_event_intr(ctrl_info);
3453
3454         if (num_responses_handled)
3455                 atomic_inc(&ctrl_info->num_interrupts);
3456
3457         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3458         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3459
3460         return IRQ_HANDLED;
3461 }
3462
3463 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3464 {
3465         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3466         int i;
3467         int rc;
3468
3469         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3470
3471         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3472                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3473                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3474                 if (rc) {
3475                         dev_err(&pci_dev->dev,
3476                                 "irq %u init failed with error %d\n",
3477                                 pci_irq_vector(pci_dev, i), rc);
3478                         return rc;
3479                 }
3480                 ctrl_info->num_msix_vectors_initialized++;
3481         }
3482
3483         return 0;
3484 }
3485
3486 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3487 {
3488         int i;
3489
3490         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3491                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3492                         &ctrl_info->queue_groups[i]);
3493
3494         ctrl_info->num_msix_vectors_initialized = 0;
3495 }
3496
3497 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3498 {
3499         int num_vectors_enabled;
3500
3501         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3502                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3503                         PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3504         if (num_vectors_enabled < 0) {
3505                 dev_err(&ctrl_info->pci_dev->dev,
3506                         "MSI-X init failed with error %d\n",
3507                         num_vectors_enabled);
3508                 return num_vectors_enabled;
3509         }
3510
3511         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
3512         ctrl_info->irq_mode = IRQ_MODE_MSIX;
3513         return 0;
3514 }
3515
3516 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3517 {
3518         if (ctrl_info->num_msix_vectors_enabled) {
3519                 pci_free_irq_vectors(ctrl_info->pci_dev);
3520                 ctrl_info->num_msix_vectors_enabled = 0;
3521         }
3522 }
3523
3524 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
3525 {
3526         unsigned int i;
3527         size_t alloc_length;
3528         size_t element_array_length_per_iq;
3529         size_t element_array_length_per_oq;
3530         void *element_array;
3531         void __iomem *next_queue_index;
3532         void *aligned_pointer;
3533         unsigned int num_inbound_queues;
3534         unsigned int num_outbound_queues;
3535         unsigned int num_queue_indexes;
3536         struct pqi_queue_group *queue_group;
3537
3538         element_array_length_per_iq =
3539                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
3540                 ctrl_info->num_elements_per_iq;
3541         element_array_length_per_oq =
3542                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
3543                 ctrl_info->num_elements_per_oq;
3544         num_inbound_queues = ctrl_info->num_queue_groups * 2;
3545         num_outbound_queues = ctrl_info->num_queue_groups;
3546         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3547
3548         aligned_pointer = NULL;
3549
3550         for (i = 0; i < num_inbound_queues; i++) {
3551                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3552                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3553                 aligned_pointer += element_array_length_per_iq;
3554         }
3555
3556         for (i = 0; i < num_outbound_queues; i++) {
3557                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3558                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3559                 aligned_pointer += element_array_length_per_oq;
3560         }
3561
3562         aligned_pointer = PTR_ALIGN(aligned_pointer,
3563                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3564         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3565                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3566
3567         for (i = 0; i < num_queue_indexes; i++) {
3568                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3569                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3570                 aligned_pointer += sizeof(pqi_index_t);
3571         }
3572
3573         alloc_length = (size_t)aligned_pointer +
3574                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3575
3576         alloc_length += PQI_EXTRA_SGL_MEMORY;
3577
3578         ctrl_info->queue_memory_base =
3579                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
3580                                    &ctrl_info->queue_memory_base_dma_handle,
3581                                    GFP_KERNEL);
3582
3583         if (!ctrl_info->queue_memory_base)
3584                 return -ENOMEM;
3585
3586         ctrl_info->queue_memory_length = alloc_length;
3587
3588         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3589                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3590
3591         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3592                 queue_group = &ctrl_info->queue_groups[i];
3593                 queue_group->iq_element_array[RAID_PATH] = element_array;
3594                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
3595                         ctrl_info->queue_memory_base_dma_handle +
3596                                 (element_array - ctrl_info->queue_memory_base);
3597                 element_array += element_array_length_per_iq;
3598                 element_array = PTR_ALIGN(element_array,
3599                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3600                 queue_group->iq_element_array[AIO_PATH] = element_array;
3601                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
3602                         ctrl_info->queue_memory_base_dma_handle +
3603                         (element_array - ctrl_info->queue_memory_base);
3604                 element_array += element_array_length_per_iq;
3605                 element_array = PTR_ALIGN(element_array,
3606                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3607         }
3608
3609         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3610                 queue_group = &ctrl_info->queue_groups[i];
3611                 queue_group->oq_element_array = element_array;
3612                 queue_group->oq_element_array_bus_addr =
3613                         ctrl_info->queue_memory_base_dma_handle +
3614                         (element_array - ctrl_info->queue_memory_base);
3615                 element_array += element_array_length_per_oq;
3616                 element_array = PTR_ALIGN(element_array,
3617                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3618         }
3619
3620         ctrl_info->event_queue.oq_element_array = element_array;
3621         ctrl_info->event_queue.oq_element_array_bus_addr =
3622                 ctrl_info->queue_memory_base_dma_handle +
3623                 (element_array - ctrl_info->queue_memory_base);
3624         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3625                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3626
3627         next_queue_index = (void __iomem *)PTR_ALIGN(element_array,
3628                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
3629
3630         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3631                 queue_group = &ctrl_info->queue_groups[i];
3632                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
3633                 queue_group->iq_ci_bus_addr[RAID_PATH] =
3634                         ctrl_info->queue_memory_base_dma_handle +
3635                         (next_queue_index -
3636                         (void __iomem *)ctrl_info->queue_memory_base);
3637                 next_queue_index += sizeof(pqi_index_t);
3638                 next_queue_index = PTR_ALIGN(next_queue_index,
3639                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3640                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
3641                 queue_group->iq_ci_bus_addr[AIO_PATH] =
3642                         ctrl_info->queue_memory_base_dma_handle +
3643                         (next_queue_index -
3644                         (void __iomem *)ctrl_info->queue_memory_base);
3645                 next_queue_index += sizeof(pqi_index_t);
3646                 next_queue_index = PTR_ALIGN(next_queue_index,
3647                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3648                 queue_group->oq_pi = next_queue_index;
3649                 queue_group->oq_pi_bus_addr =
3650                         ctrl_info->queue_memory_base_dma_handle +
3651                         (next_queue_index -
3652                         (void __iomem *)ctrl_info->queue_memory_base);
3653                 next_queue_index += sizeof(pqi_index_t);
3654                 next_queue_index = PTR_ALIGN(next_queue_index,
3655                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3656         }
3657
3658         ctrl_info->event_queue.oq_pi = next_queue_index;
3659         ctrl_info->event_queue.oq_pi_bus_addr =
3660                 ctrl_info->queue_memory_base_dma_handle +
3661                 (next_queue_index -
3662                 (void __iomem *)ctrl_info->queue_memory_base);
3663
3664         return 0;
3665 }
3666
3667 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3668 {
3669         unsigned int i;
3670         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3671         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3672
3673         /*
3674          * Initialize the backpointers to the controller structure in
3675          * each operational queue group structure.
3676          */
3677         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3678                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
3679
3680         /*
3681          * Assign IDs to all operational queues.  Note that the IDs
3682          * assigned to operational IQs are independent of the IDs
3683          * assigned to operational OQs.
3684          */
3685         ctrl_info->event_queue.oq_id = next_oq_id++;
3686         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3687                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
3688                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
3689                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
3690         }
3691
3692         /*
3693          * Assign MSI-X table entry indexes to all queues.  Note that the
3694          * interrupt for the event queue is shared with the first queue group.
3695          */
3696         ctrl_info->event_queue.int_msg_num = 0;
3697         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3698                 ctrl_info->queue_groups[i].int_msg_num = i;
3699
3700         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3701                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
3702                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
3703                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
3704                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
3705         }
3706 }
3707
3708 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
3709 {
3710         size_t alloc_length;
3711         struct pqi_admin_queues_aligned *admin_queues_aligned;
3712         struct pqi_admin_queues *admin_queues;
3713
3714         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
3715                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3716
3717         ctrl_info->admin_queue_memory_base =
3718                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
3719                                    &ctrl_info->admin_queue_memory_base_dma_handle,
3720                                    GFP_KERNEL);
3721
3722         if (!ctrl_info->admin_queue_memory_base)
3723                 return -ENOMEM;
3724
3725         ctrl_info->admin_queue_memory_length = alloc_length;
3726
3727         admin_queues = &ctrl_info->admin_queues;
3728         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
3729                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3730         admin_queues->iq_element_array =
3731                 &admin_queues_aligned->iq_element_array;
3732         admin_queues->oq_element_array =
3733                 &admin_queues_aligned->oq_element_array;
3734         admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
3735         admin_queues->oq_pi =
3736                 (pqi_index_t __iomem *)&admin_queues_aligned->oq_pi;
3737
3738         admin_queues->iq_element_array_bus_addr =
3739                 ctrl_info->admin_queue_memory_base_dma_handle +
3740                 (admin_queues->iq_element_array -
3741                 ctrl_info->admin_queue_memory_base);
3742         admin_queues->oq_element_array_bus_addr =
3743                 ctrl_info->admin_queue_memory_base_dma_handle +
3744                 (admin_queues->oq_element_array -
3745                 ctrl_info->admin_queue_memory_base);
3746         admin_queues->iq_ci_bus_addr =
3747                 ctrl_info->admin_queue_memory_base_dma_handle +
3748                 ((void *)admin_queues->iq_ci -
3749                 ctrl_info->admin_queue_memory_base);
3750         admin_queues->oq_pi_bus_addr =
3751                 ctrl_info->admin_queue_memory_base_dma_handle +
3752                 ((void __iomem *)admin_queues->oq_pi -
3753                 (void __iomem *)ctrl_info->admin_queue_memory_base);
3754
3755         return 0;
3756 }
3757
3758 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          PQI_HZ
3759 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
3760
3761 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
3762 {
3763         struct pqi_device_registers __iomem *pqi_registers;
3764         struct pqi_admin_queues *admin_queues;
3765         unsigned long timeout;
3766         u8 status;
3767         u32 reg;
3768
3769         pqi_registers = ctrl_info->pqi_registers;
3770         admin_queues = &ctrl_info->admin_queues;
3771
3772         writeq((u64)admin_queues->iq_element_array_bus_addr,
3773                 &pqi_registers->admin_iq_element_array_addr);
3774         writeq((u64)admin_queues->oq_element_array_bus_addr,
3775                 &pqi_registers->admin_oq_element_array_addr);
3776         writeq((u64)admin_queues->iq_ci_bus_addr,
3777                 &pqi_registers->admin_iq_ci_addr);
3778         writeq((u64)admin_queues->oq_pi_bus_addr,
3779                 &pqi_registers->admin_oq_pi_addr);
3780
3781         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
3782                 (PQI_ADMIN_OQ_NUM_ELEMENTS) << 8 |
3783                 (admin_queues->int_msg_num << 16);
3784         writel(reg, &pqi_registers->admin_iq_num_elements);
3785         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
3786                 &pqi_registers->function_and_status_code);
3787
3788         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
3789         while (1) {
3790                 status = readb(&pqi_registers->function_and_status_code);
3791                 if (status == PQI_STATUS_IDLE)
3792                         break;
3793                 if (time_after(jiffies, timeout))
3794                         return -ETIMEDOUT;
3795                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
3796         }
3797
3798         /*
3799          * The offset registers are not initialized to the correct
3800          * offsets until *after* the create admin queue pair command
3801          * completes successfully.
3802          */
3803         admin_queues->iq_pi = ctrl_info->iomem_base +
3804                 PQI_DEVICE_REGISTERS_OFFSET +
3805                 readq(&pqi_registers->admin_iq_pi_offset);
3806         admin_queues->oq_ci = ctrl_info->iomem_base +
3807                 PQI_DEVICE_REGISTERS_OFFSET +
3808                 readq(&pqi_registers->admin_oq_ci_offset);
3809
3810         return 0;
3811 }
3812
3813 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
3814         struct pqi_general_admin_request *request)
3815 {
3816         struct pqi_admin_queues *admin_queues;
3817         void *next_element;
3818         pqi_index_t iq_pi;
3819
3820         admin_queues = &ctrl_info->admin_queues;
3821         iq_pi = admin_queues->iq_pi_copy;
3822
3823         next_element = admin_queues->iq_element_array +
3824                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
3825
3826         memcpy(next_element, request, sizeof(*request));
3827
3828         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
3829         admin_queues->iq_pi_copy = iq_pi;
3830
3831         /*
3832          * This write notifies the controller that an IU is available to be
3833          * processed.
3834          */
3835         writel(iq_pi, admin_queues->iq_pi);
3836 }
3837
3838 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
3839
3840 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
3841         struct pqi_general_admin_response *response)
3842 {
3843         struct pqi_admin_queues *admin_queues;
3844         pqi_index_t oq_pi;
3845         pqi_index_t oq_ci;
3846         unsigned long timeout;
3847
3848         admin_queues = &ctrl_info->admin_queues;
3849         oq_ci = admin_queues->oq_ci_copy;
3850
3851         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * PQI_HZ) + jiffies;
3852
3853         while (1) {
3854                 oq_pi = readl(admin_queues->oq_pi);
3855                 if (oq_pi != oq_ci)
3856                         break;
3857                 if (time_after(jiffies, timeout)) {
3858                         dev_err(&ctrl_info->pci_dev->dev,
3859                                 "timed out waiting for admin response\n");
3860                         return -ETIMEDOUT;
3861                 }
3862                 if (!sis_is_firmware_running(ctrl_info))
3863                         return -ENXIO;
3864                 usleep_range(1000, 2000);
3865         }
3866
3867         memcpy(response, admin_queues->oq_element_array +
3868                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
3869
3870         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
3871         admin_queues->oq_ci_copy = oq_ci;
3872         writel(oq_ci, admin_queues->oq_ci);
3873
3874         return 0;
3875 }
3876
3877 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
3878         struct pqi_queue_group *queue_group, enum pqi_io_path path,
3879         struct pqi_io_request *io_request)
3880 {
3881         struct pqi_io_request *next;
3882         void *next_element;
3883         pqi_index_t iq_pi;
3884         pqi_index_t iq_ci;
3885         size_t iu_length;
3886         unsigned long flags;
3887         unsigned int num_elements_needed;
3888         unsigned int num_elements_to_end_of_queue;
3889         size_t copy_count;
3890         struct pqi_iu_header *request;
3891
3892         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
3893
3894         if (io_request) {
3895                 io_request->queue_group = queue_group;
3896                 list_add_tail(&io_request->request_list_entry,
3897                         &queue_group->request_list[path]);
3898         }
3899
3900         iq_pi = queue_group->iq_pi_copy[path];
3901
3902         list_for_each_entry_safe(io_request, next,
3903                 &queue_group->request_list[path], request_list_entry) {
3904
3905                 request = io_request->iu;
3906
3907                 iu_length = get_unaligned_le16(&request->iu_length) +
3908                         PQI_REQUEST_HEADER_LENGTH;
3909                 num_elements_needed =
3910                         DIV_ROUND_UP(iu_length,
3911                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3912
3913                 iq_ci = readl(queue_group->iq_ci[path]);
3914
3915                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
3916                         ctrl_info->num_elements_per_iq))
3917                         break;
3918
3919                 put_unaligned_le16(queue_group->oq_id,
3920                         &request->response_queue_id);
3921
3922                 next_element = queue_group->iq_element_array[path] +
3923                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3924
3925                 num_elements_to_end_of_queue =
3926                         ctrl_info->num_elements_per_iq - iq_pi;
3927
3928                 if (num_elements_needed <= num_elements_to_end_of_queue) {
3929                         memcpy(next_element, request, iu_length);
3930                 } else {
3931                         copy_count = num_elements_to_end_of_queue *
3932                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
3933                         memcpy(next_element, request, copy_count);
3934                         memcpy(queue_group->iq_element_array[path],
3935                                 (u8 *)request + copy_count,
3936                                 iu_length - copy_count);
3937                 }
3938
3939                 iq_pi = (iq_pi + num_elements_needed) %
3940                         ctrl_info->num_elements_per_iq;
3941
3942                 list_del(&io_request->request_list_entry);
3943         }
3944
3945         if (iq_pi != queue_group->iq_pi_copy[path]) {
3946                 queue_group->iq_pi_copy[path] = iq_pi;
3947                 /*
3948                  * This write notifies the controller that one or more IUs are
3949                  * available to be processed.
3950                  */
3951                 writel(iq_pi, queue_group->iq_pi[path]);
3952         }
3953
3954         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
3955 }
3956
3957 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
3958
3959 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
3960         struct completion *wait)
3961 {
3962         int rc;
3963
3964         while (1) {
3965                 if (wait_for_completion_io_timeout(wait,
3966                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * PQI_HZ)) {
3967                         rc = 0;
3968                         break;
3969                 }
3970
3971                 pqi_check_ctrl_health(ctrl_info);
3972                 if (pqi_ctrl_offline(ctrl_info)) {
3973                         rc = -ENXIO;
3974                         break;
3975                 }
3976         }
3977
3978         return rc;
3979 }
3980
3981 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
3982         void *context)
3983 {
3984         struct completion *waiting = context;
3985
3986         complete(waiting);
3987 }
3988
3989 static int pqi_process_raid_io_error_synchronous(struct pqi_raid_error_info
3990                                                 *error_info)
3991 {
3992         int rc = -EIO;
3993
3994         switch (error_info->data_out_result) {
3995         case PQI_DATA_IN_OUT_GOOD:
3996                 if (error_info->status == SAM_STAT_GOOD)
3997                         rc = 0;
3998                 break;
3999         case PQI_DATA_IN_OUT_UNDERFLOW:
4000                 if (error_info->status == SAM_STAT_GOOD ||
4001                         error_info->status == SAM_STAT_CHECK_CONDITION)
4002                         rc = 0;
4003                 break;
4004         case PQI_DATA_IN_OUT_ABORTED:
4005                 rc = PQI_CMD_STATUS_ABORTED;
4006                 break;
4007         }
4008
4009         return rc;
4010 }
4011
4012 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
4013         struct pqi_iu_header *request, unsigned int flags,
4014         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
4015 {
4016         int rc = 0;
4017         struct pqi_io_request *io_request;
4018         unsigned long start_jiffies;
4019         unsigned long msecs_blocked;
4020         size_t iu_length;
4021         DECLARE_COMPLETION_ONSTACK(wait);
4022
4023         /*
4024          * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
4025          * are mutually exclusive.
4026          */
4027
4028         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
4029                 if (down_interruptible(&ctrl_info->sync_request_sem))
4030                         return -ERESTARTSYS;
4031         } else {
4032                 if (timeout_msecs == NO_TIMEOUT) {
4033                         down(&ctrl_info->sync_request_sem);
4034                 } else {
4035                         start_jiffies = jiffies;
4036                         if (down_timeout(&ctrl_info->sync_request_sem,
4037                                 msecs_to_jiffies(timeout_msecs)))
4038                                 return -ETIMEDOUT;
4039                         msecs_blocked =
4040                                 jiffies_to_msecs(jiffies - start_jiffies);
4041                         if (msecs_blocked >= timeout_msecs)
4042                                 return -ETIMEDOUT;
4043                         timeout_msecs -= msecs_blocked;
4044                 }
4045         }
4046
4047         pqi_ctrl_busy(ctrl_info);
4048         timeout_msecs = pqi_wait_if_ctrl_blocked(ctrl_info, timeout_msecs);
4049         if (timeout_msecs == 0) {
4050                 pqi_ctrl_unbusy(ctrl_info);
4051                 rc = -ETIMEDOUT;
4052                 goto out;
4053         }
4054
4055         if (pqi_ctrl_offline(ctrl_info)) {
4056                 pqi_ctrl_unbusy(ctrl_info);
4057                 rc = -ENXIO;
4058                 goto out;
4059         }
4060
4061         io_request = pqi_alloc_io_request(ctrl_info);
4062
4063         put_unaligned_le16(io_request->index,
4064                 &(((struct pqi_raid_path_request *)request)->request_id));
4065
4066         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
4067                 ((struct pqi_raid_path_request *)request)->error_index =
4068                         ((struct pqi_raid_path_request *)request)->request_id;
4069
4070         iu_length = get_unaligned_le16(&request->iu_length) +
4071                 PQI_REQUEST_HEADER_LENGTH;
4072         memcpy(io_request->iu, request, iu_length);
4073
4074         io_request->io_complete_callback = pqi_raid_synchronous_complete;
4075         io_request->context = &wait;
4076
4077         pqi_start_io(ctrl_info,
4078                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
4079                 io_request);
4080
4081         pqi_ctrl_unbusy(ctrl_info);
4082
4083         if (timeout_msecs == NO_TIMEOUT) {
4084                 pqi_wait_for_completion_io(ctrl_info, &wait);
4085         } else {
4086                 if (!wait_for_completion_io_timeout(&wait,
4087                         msecs_to_jiffies(timeout_msecs))) {
4088                         dev_warn(&ctrl_info->pci_dev->dev,
4089                                 "command timed out\n");
4090                         rc = -ETIMEDOUT;
4091                 }
4092         }
4093
4094         if (error_info) {
4095                 if (io_request->error_info)
4096                         memcpy(error_info, io_request->error_info,
4097                                 sizeof(*error_info));
4098                 else
4099                         memset(error_info, 0, sizeof(*error_info));
4100         } else if (rc == 0 && io_request->error_info) {
4101                 rc = pqi_process_raid_io_error_synchronous(
4102                         io_request->error_info);
4103         }
4104
4105         pqi_free_io_request(io_request);
4106
4107 out:
4108         up(&ctrl_info->sync_request_sem);
4109
4110         return rc;
4111 }
4112
4113 static int pqi_validate_admin_response(
4114         struct pqi_general_admin_response *response, u8 expected_function_code)
4115 {
4116         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
4117                 return -EINVAL;
4118
4119         if (get_unaligned_le16(&response->header.iu_length) !=
4120                 PQI_GENERAL_ADMIN_IU_LENGTH)
4121                 return -EINVAL;
4122
4123         if (response->function_code != expected_function_code)
4124                 return -EINVAL;
4125
4126         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
4127                 return -EINVAL;
4128
4129         return 0;
4130 }
4131
4132 static int pqi_submit_admin_request_synchronous(
4133         struct pqi_ctrl_info *ctrl_info,
4134         struct pqi_general_admin_request *request,
4135         struct pqi_general_admin_response *response)
4136 {
4137         int rc;
4138
4139         pqi_submit_admin_request(ctrl_info, request);
4140
4141         rc = pqi_poll_for_admin_response(ctrl_info, response);
4142
4143         if (rc == 0)
4144                 rc = pqi_validate_admin_response(response,
4145                         request->function_code);
4146
4147         return rc;
4148 }
4149
4150 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
4151 {
4152         int rc;
4153         struct pqi_general_admin_request request;
4154         struct pqi_general_admin_response response;
4155         struct pqi_device_capability *capability;
4156         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
4157
4158         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
4159         if (!capability)
4160                 return -ENOMEM;
4161
4162         memset(&request, 0, sizeof(request));
4163
4164         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4165         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4166                 &request.header.iu_length);
4167         request.function_code =
4168                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
4169         put_unaligned_le32(sizeof(*capability),
4170                 &request.data.report_device_capability.buffer_length);
4171
4172         rc = pqi_map_single(ctrl_info->pci_dev,
4173                 &request.data.report_device_capability.sg_descriptor,
4174                 capability, sizeof(*capability),
4175                 DMA_FROM_DEVICE);
4176         if (rc)
4177                 goto out;
4178
4179         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4180                 &response);
4181
4182         pqi_pci_unmap(ctrl_info->pci_dev,
4183                 &request.data.report_device_capability.sg_descriptor, 1,
4184                 DMA_FROM_DEVICE);
4185
4186         if (rc)
4187                 goto out;
4188
4189         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
4190                 rc = -EIO;
4191                 goto out;
4192         }
4193
4194         ctrl_info->max_inbound_queues =
4195                 get_unaligned_le16(&capability->max_inbound_queues);
4196         ctrl_info->max_elements_per_iq =
4197                 get_unaligned_le16(&capability->max_elements_per_iq);
4198         ctrl_info->max_iq_element_length =
4199                 get_unaligned_le16(&capability->max_iq_element_length)
4200                 * 16;
4201         ctrl_info->max_outbound_queues =
4202                 get_unaligned_le16(&capability->max_outbound_queues);
4203         ctrl_info->max_elements_per_oq =
4204                 get_unaligned_le16(&capability->max_elements_per_oq);
4205         ctrl_info->max_oq_element_length =
4206                 get_unaligned_le16(&capability->max_oq_element_length)
4207                 * 16;
4208
4209         sop_iu_layer_descriptor =
4210                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
4211
4212         ctrl_info->max_inbound_iu_length_per_firmware =
4213                 get_unaligned_le16(
4214                         &sop_iu_layer_descriptor->max_inbound_iu_length);
4215         ctrl_info->inbound_spanning_supported =
4216                 sop_iu_layer_descriptor->inbound_spanning_supported;
4217         ctrl_info->outbound_spanning_supported =
4218                 sop_iu_layer_descriptor->outbound_spanning_supported;
4219
4220 out:
4221         kfree(capability);
4222
4223         return rc;
4224 }
4225
4226 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
4227 {
4228         if (ctrl_info->max_iq_element_length <
4229                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4230                 dev_err(&ctrl_info->pci_dev->dev,
4231                         "max. inbound queue element length of %d is less than the required length of %d\n",
4232                         ctrl_info->max_iq_element_length,
4233                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4234                 return -EINVAL;
4235         }
4236
4237         if (ctrl_info->max_oq_element_length <
4238                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
4239                 dev_err(&ctrl_info->pci_dev->dev,
4240                         "max. outbound queue element length of %d is less than the required length of %d\n",
4241                         ctrl_info->max_oq_element_length,
4242                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
4243                 return -EINVAL;
4244         }
4245
4246         if (ctrl_info->max_inbound_iu_length_per_firmware <
4247                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4248                 dev_err(&ctrl_info->pci_dev->dev,
4249                         "max. inbound IU length of %u is less than the min. required length of %d\n",
4250                         ctrl_info->max_inbound_iu_length_per_firmware,
4251                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4252                 return -EINVAL;
4253         }
4254
4255         if (!ctrl_info->inbound_spanning_supported) {
4256                 dev_err(&ctrl_info->pci_dev->dev,
4257                         "the controller does not support inbound spanning\n");
4258                 return -EINVAL;
4259         }
4260
4261         if (ctrl_info->outbound_spanning_supported) {
4262                 dev_err(&ctrl_info->pci_dev->dev,
4263                         "the controller supports outbound spanning but this driver does not\n");
4264                 return -EINVAL;
4265         }
4266
4267         return 0;
4268 }
4269
4270 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
4271 {
4272         int rc;
4273         struct pqi_event_queue *event_queue;
4274         struct pqi_general_admin_request request;
4275         struct pqi_general_admin_response response;
4276
4277         event_queue = &ctrl_info->event_queue;
4278
4279         /*
4280          * Create OQ (Outbound Queue - device to host queue) to dedicate
4281          * to events.
4282          */
4283         memset(&request, 0, sizeof(request));
4284         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4285         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4286                 &request.header.iu_length);
4287         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4288         put_unaligned_le16(event_queue->oq_id,
4289                 &request.data.create_operational_oq.queue_id);
4290         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
4291                 &request.data.create_operational_oq.element_array_addr);
4292         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
4293                 &request.data.create_operational_oq.pi_addr);
4294         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
4295                 &request.data.create_operational_oq.num_elements);
4296         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
4297                 &request.data.create_operational_oq.element_length);
4298         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4299         put_unaligned_le16(event_queue->int_msg_num,
4300                 &request.data.create_operational_oq.int_msg_num);
4301
4302         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4303                 &response);
4304         if (rc)
4305                 return rc;
4306
4307         event_queue->oq_ci = ctrl_info->iomem_base +
4308                 PQI_DEVICE_REGISTERS_OFFSET +
4309                 get_unaligned_le64(
4310                         &response.data.create_operational_oq.oq_ci_offset);
4311
4312         return 0;
4313 }
4314
4315 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
4316         unsigned int group_number)
4317 {
4318         int rc;
4319         struct pqi_queue_group *queue_group;
4320         struct pqi_general_admin_request request;
4321         struct pqi_general_admin_response response;
4322
4323         queue_group = &ctrl_info->queue_groups[group_number];
4324
4325         /*
4326          * Create IQ (Inbound Queue - host to device queue) for
4327          * RAID path.
4328          */
4329         memset(&request, 0, sizeof(request));
4330         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4331         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4332                 &request.header.iu_length);
4333         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4334         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
4335                 &request.data.create_operational_iq.queue_id);
4336         put_unaligned_le64(
4337                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
4338                 &request.data.create_operational_iq.element_array_addr);
4339         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
4340                 &request.data.create_operational_iq.ci_addr);
4341         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4342                 &request.data.create_operational_iq.num_elements);
4343         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4344                 &request.data.create_operational_iq.element_length);
4345         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4346
4347         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4348                 &response);
4349         if (rc) {
4350                 dev_err(&ctrl_info->pci_dev->dev,
4351                         "error creating inbound RAID queue\n");
4352                 return rc;
4353         }
4354
4355         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4356                 PQI_DEVICE_REGISTERS_OFFSET +
4357                 get_unaligned_le64(
4358                         &response.data.create_operational_iq.iq_pi_offset);
4359
4360         /*
4361          * Create IQ (Inbound Queue - host to device queue) for
4362          * Advanced I/O (AIO) path.
4363          */
4364         memset(&request, 0, sizeof(request));
4365         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4366         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4367                 &request.header.iu_length);
4368         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4369         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4370                 &request.data.create_operational_iq.queue_id);
4371         put_unaligned_le64((u64)queue_group->
4372                 iq_element_array_bus_addr[AIO_PATH],
4373                 &request.data.create_operational_iq.element_array_addr);
4374         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4375                 &request.data.create_operational_iq.ci_addr);
4376         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4377                 &request.data.create_operational_iq.num_elements);
4378         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4379                 &request.data.create_operational_iq.element_length);
4380         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4381
4382         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4383                 &response);
4384         if (rc) {
4385                 dev_err(&ctrl_info->pci_dev->dev,
4386                         "error creating inbound AIO queue\n");
4387                 return rc;
4388         }
4389
4390         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4391                 PQI_DEVICE_REGISTERS_OFFSET +
4392                 get_unaligned_le64(
4393                         &response.data.create_operational_iq.iq_pi_offset);
4394
4395         /*
4396          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4397          * assumed to be for RAID path I/O unless we change the queue's
4398          * property.
4399          */
4400         memset(&request, 0, sizeof(request));
4401         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4402         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4403                 &request.header.iu_length);
4404         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4405         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4406                 &request.data.change_operational_iq_properties.queue_id);
4407         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4408                 &request.data.change_operational_iq_properties.vendor_specific);
4409
4410         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4411                 &response);
4412         if (rc) {
4413                 dev_err(&ctrl_info->pci_dev->dev,
4414                         "error changing queue property\n");
4415                 return rc;
4416         }
4417
4418         /*
4419          * Create OQ (Outbound Queue - device to host queue).
4420          */
4421         memset(&request, 0, sizeof(request));
4422         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4423         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4424                 &request.header.iu_length);
4425         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4426         put_unaligned_le16(queue_group->oq_id,
4427                 &request.data.create_operational_oq.queue_id);
4428         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4429                 &request.data.create_operational_oq.element_array_addr);
4430         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4431                 &request.data.create_operational_oq.pi_addr);
4432         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4433                 &request.data.create_operational_oq.num_elements);
4434         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4435                 &request.data.create_operational_oq.element_length);
4436         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4437         put_unaligned_le16(queue_group->int_msg_num,
4438                 &request.data.create_operational_oq.int_msg_num);
4439
4440         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4441                 &response);
4442         if (rc) {
4443                 dev_err(&ctrl_info->pci_dev->dev,
4444                         "error creating outbound queue\n");
4445                 return rc;
4446         }
4447
4448         queue_group->oq_ci = ctrl_info->iomem_base +
4449                 PQI_DEVICE_REGISTERS_OFFSET +
4450                 get_unaligned_le64(
4451                         &response.data.create_operational_oq.oq_ci_offset);
4452
4453         return 0;
4454 }
4455
4456 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4457 {
4458         int rc;
4459         unsigned int i;
4460
4461         rc = pqi_create_event_queue(ctrl_info);
4462         if (rc) {
4463                 dev_err(&ctrl_info->pci_dev->dev,
4464                         "error creating event queue\n");
4465                 return rc;
4466         }
4467
4468         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4469                 rc = pqi_create_queue_group(ctrl_info, i);
4470                 if (rc) {
4471                         dev_err(&ctrl_info->pci_dev->dev,
4472                                 "error creating queue group number %u/%u\n",
4473                                 i, ctrl_info->num_queue_groups);
4474                         return rc;
4475                 }
4476         }
4477
4478         return 0;
4479 }
4480
4481 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4482         (offsetof(struct pqi_event_config, descriptors) + \
4483         (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
4484
4485 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4486         bool enable_events)
4487 {
4488         int rc;
4489         unsigned int i;
4490         struct pqi_event_config *event_config;
4491         struct pqi_event_descriptor *event_descriptor;
4492         struct pqi_general_management_request request;
4493
4494         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4495                 GFP_KERNEL);
4496         if (!event_config)
4497                 return -ENOMEM;
4498
4499         memset(&request, 0, sizeof(request));
4500
4501         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4502         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4503                 data.report_event_configuration.sg_descriptors[1]) -
4504                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4505         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4506                 &request.data.report_event_configuration.buffer_length);
4507
4508         rc = pqi_map_single(ctrl_info->pci_dev,
4509                 request.data.report_event_configuration.sg_descriptors,
4510                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4511                 DMA_FROM_DEVICE);
4512         if (rc)
4513                 goto out;
4514
4515         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
4516                 0, NULL, NO_TIMEOUT);
4517
4518         pqi_pci_unmap(ctrl_info->pci_dev,
4519                 request.data.report_event_configuration.sg_descriptors, 1,
4520                 DMA_FROM_DEVICE);
4521
4522         if (rc)
4523                 goto out;
4524
4525         for (i = 0; i < event_config->num_event_descriptors; i++) {
4526                 event_descriptor = &event_config->descriptors[i];
4527                 if (enable_events &&
4528                         pqi_is_supported_event(event_descriptor->event_type))
4529                         put_unaligned_le16(ctrl_info->event_queue.oq_id,
4530                                         &event_descriptor->oq_id);
4531                 else
4532                         put_unaligned_le16(0, &event_descriptor->oq_id);
4533         }
4534
4535         memset(&request, 0, sizeof(request));
4536
4537         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4538         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4539                 data.report_event_configuration.sg_descriptors[1]) -
4540                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4541         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4542                 &request.data.report_event_configuration.buffer_length);
4543
4544         rc = pqi_map_single(ctrl_info->pci_dev,
4545                 request.data.report_event_configuration.sg_descriptors,
4546                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4547                 DMA_TO_DEVICE);
4548         if (rc)
4549                 goto out;
4550
4551         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
4552                 NULL, NO_TIMEOUT);
4553
4554         pqi_pci_unmap(ctrl_info->pci_dev,
4555                 request.data.report_event_configuration.sg_descriptors, 1,
4556                 DMA_TO_DEVICE);
4557
4558 out:
4559         kfree(event_config);
4560
4561         return rc;
4562 }
4563
4564 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
4565 {
4566         return pqi_configure_events(ctrl_info, true);
4567 }
4568
4569 static inline int pqi_disable_events(struct pqi_ctrl_info *ctrl_info)
4570 {
4571         return pqi_configure_events(ctrl_info, false);
4572 }
4573
4574 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
4575 {
4576         unsigned int i;
4577         struct device *dev;
4578         size_t sg_chain_buffer_length;
4579         struct pqi_io_request *io_request;
4580
4581         if (!ctrl_info->io_request_pool)
4582                 return;
4583
4584         dev = &ctrl_info->pci_dev->dev;
4585         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4586         io_request = ctrl_info->io_request_pool;
4587
4588         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4589                 kfree(io_request->iu);
4590                 if (!io_request->sg_chain_buffer)
4591                         break;
4592                 dma_free_coherent(dev, sg_chain_buffer_length,
4593                         io_request->sg_chain_buffer,
4594                         io_request->sg_chain_buffer_dma_handle);
4595                 io_request++;
4596         }
4597
4598         kfree(ctrl_info->io_request_pool);
4599         ctrl_info->io_request_pool = NULL;
4600 }
4601
4602 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4603 {
4604         ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev,
4605                                                      ctrl_info->error_buffer_length,
4606                                                      &ctrl_info->error_buffer_dma_handle,
4607                                                      GFP_KERNEL);
4608
4609         if (!ctrl_info->error_buffer)
4610                 return -ENOMEM;
4611
4612         return 0;
4613 }
4614
4615 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4616 {
4617         unsigned int i;
4618         void *sg_chain_buffer;
4619         size_t sg_chain_buffer_length;
4620         dma_addr_t sg_chain_buffer_dma_handle;
4621         struct device *dev;
4622         struct pqi_io_request *io_request;
4623
4624         ctrl_info->io_request_pool =
4625                 kcalloc(ctrl_info->max_io_slots,
4626                         sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4627
4628         if (!ctrl_info->io_request_pool) {
4629                 dev_err(&ctrl_info->pci_dev->dev,
4630                         "failed to allocate I/O request pool\n");
4631                 goto error;
4632         }
4633
4634         dev = &ctrl_info->pci_dev->dev;
4635         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4636         io_request = ctrl_info->io_request_pool;
4637
4638         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4639                 io_request->iu =
4640                         kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4641
4642                 if (!io_request->iu) {
4643                         dev_err(&ctrl_info->pci_dev->dev,
4644                                 "failed to allocate IU buffers\n");
4645                         goto error;
4646                 }
4647
4648                 sg_chain_buffer = dma_alloc_coherent(dev,
4649                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4650                         GFP_KERNEL);
4651
4652                 if (!sg_chain_buffer) {
4653                         dev_err(&ctrl_info->pci_dev->dev,
4654                                 "failed to allocate PQI scatter-gather chain buffers\n");
4655                         goto error;
4656                 }
4657
4658                 io_request->index = i;
4659                 io_request->sg_chain_buffer = sg_chain_buffer;
4660                 io_request->sg_chain_buffer_dma_handle =
4661                         sg_chain_buffer_dma_handle;
4662                 io_request++;
4663         }
4664
4665         return 0;
4666
4667 error:
4668         pqi_free_all_io_requests(ctrl_info);
4669
4670         return -ENOMEM;
4671 }
4672
4673 /*
4674  * Calculate required resources that are sized based on max. outstanding
4675  * requests and max. transfer size.
4676  */
4677
4678 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4679 {
4680         u32 max_transfer_size;
4681         u32 max_sg_entries;
4682
4683         ctrl_info->scsi_ml_can_queue =
4684                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4685         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4686
4687         ctrl_info->error_buffer_length =
4688                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4689
4690         if (reset_devices)
4691                 max_transfer_size = min(ctrl_info->max_transfer_size,
4692                         PQI_MAX_TRANSFER_SIZE_KDUMP);
4693         else
4694                 max_transfer_size = min(ctrl_info->max_transfer_size,
4695                         PQI_MAX_TRANSFER_SIZE);
4696
4697         max_sg_entries = max_transfer_size / PAGE_SIZE;
4698
4699         /* +1 to cover when the buffer is not page-aligned. */
4700         max_sg_entries++;
4701
4702         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4703
4704         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4705
4706         ctrl_info->sg_chain_buffer_length =
4707                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4708                 PQI_EXTRA_SGL_MEMORY;
4709         ctrl_info->sg_tablesize = max_sg_entries;
4710         ctrl_info->max_sectors = max_transfer_size / 512;
4711 }
4712
4713 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4714 {
4715         int num_queue_groups;
4716         u16 num_elements_per_iq;
4717         u16 num_elements_per_oq;
4718
4719         if (reset_devices) {
4720                 num_queue_groups = 1;
4721         } else {
4722                 int num_cpus;
4723                 int max_queue_groups;
4724
4725                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4726                         ctrl_info->max_outbound_queues - 1);
4727                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4728
4729                 num_cpus = num_online_cpus();
4730                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4731                 num_queue_groups = min(num_queue_groups, max_queue_groups);
4732         }
4733
4734         ctrl_info->num_queue_groups = num_queue_groups;
4735         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
4736
4737         /*
4738          * Make sure that the max. inbound IU length is an even multiple
4739          * of our inbound element length.
4740          */
4741         ctrl_info->max_inbound_iu_length =
4742                 (ctrl_info->max_inbound_iu_length_per_firmware /
4743                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4744                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4745
4746         num_elements_per_iq =
4747                 (ctrl_info->max_inbound_iu_length /
4748                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4749
4750         /* Add one because one element in each queue is unusable. */
4751         num_elements_per_iq++;
4752
4753         num_elements_per_iq = min(num_elements_per_iq,
4754                 ctrl_info->max_elements_per_iq);
4755
4756         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4757         num_elements_per_oq = min(num_elements_per_oq,
4758                 ctrl_info->max_elements_per_oq);
4759
4760         ctrl_info->num_elements_per_iq = num_elements_per_iq;
4761         ctrl_info->num_elements_per_oq = num_elements_per_oq;
4762
4763         ctrl_info->max_sg_per_iu =
4764                 ((ctrl_info->max_inbound_iu_length -
4765                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4766                 sizeof(struct pqi_sg_descriptor)) +
4767                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4768 }
4769
4770 static inline void pqi_set_sg_descriptor(
4771         struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4772 {
4773         u64 address = (u64)sg_dma_address(sg);
4774         unsigned int length = sg_dma_len(sg);
4775
4776         put_unaligned_le64(address, &sg_descriptor->address);
4777         put_unaligned_le32(length, &sg_descriptor->length);
4778         put_unaligned_le32(0, &sg_descriptor->flags);
4779 }
4780
4781 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4782         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4783         struct pqi_io_request *io_request)
4784 {
4785         int i;
4786         u16 iu_length;
4787         int sg_count;
4788         bool chained;
4789         unsigned int num_sg_in_iu;
4790         unsigned int max_sg_per_iu;
4791         struct scatterlist *sg;
4792         struct pqi_sg_descriptor *sg_descriptor;
4793
4794         sg_count = scsi_dma_map(scmd);
4795         if (sg_count < 0)
4796                 return sg_count;
4797
4798         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4799                 PQI_REQUEST_HEADER_LENGTH;
4800
4801         if (sg_count == 0)
4802                 goto out;
4803
4804         sg = scsi_sglist(scmd);
4805         sg_descriptor = request->sg_descriptors;
4806         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4807         chained = false;
4808         num_sg_in_iu = 0;
4809         i = 0;
4810
4811         while (1) {
4812                 pqi_set_sg_descriptor(sg_descriptor, sg);
4813                 if (!chained)
4814                         num_sg_in_iu++;
4815                 i++;
4816                 if (i == sg_count)
4817                         break;
4818                 sg_descriptor++;
4819                 if (i == max_sg_per_iu) {
4820                         put_unaligned_le64(
4821                                 (u64)io_request->sg_chain_buffer_dma_handle,
4822                                 &sg_descriptor->address);
4823                         put_unaligned_le32((sg_count - num_sg_in_iu)
4824                                 * sizeof(*sg_descriptor),
4825                                 &sg_descriptor->length);
4826                         put_unaligned_le32(CISS_SG_CHAIN,
4827                                 &sg_descriptor->flags);
4828                         chained = true;
4829                         num_sg_in_iu++;
4830                         sg_descriptor = io_request->sg_chain_buffer;
4831                 }
4832                 sg = sg_next(sg);
4833         }
4834
4835         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4836         request->partial = chained;
4837         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4838
4839 out:
4840         put_unaligned_le16(iu_length, &request->header.iu_length);
4841
4842         return 0;
4843 }
4844
4845 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4846         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4847         struct pqi_io_request *io_request)
4848 {
4849         int i;
4850         u16 iu_length;
4851         int sg_count;
4852         bool chained;
4853         unsigned int num_sg_in_iu;
4854         unsigned int max_sg_per_iu;
4855         struct scatterlist *sg;
4856         struct pqi_sg_descriptor *sg_descriptor;
4857
4858         sg_count = scsi_dma_map(scmd);
4859         if (sg_count < 0)
4860                 return sg_count;
4861
4862         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4863                 PQI_REQUEST_HEADER_LENGTH;
4864         num_sg_in_iu = 0;
4865
4866         if (sg_count == 0)
4867                 goto out;
4868
4869         sg = scsi_sglist(scmd);
4870         sg_descriptor = request->sg_descriptors;
4871         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4872         chained = false;
4873         i = 0;
4874
4875         while (1) {
4876                 pqi_set_sg_descriptor(sg_descriptor, sg);
4877                 if (!chained)
4878                         num_sg_in_iu++;
4879                 i++;
4880                 if (i == sg_count)
4881                         break;
4882                 sg_descriptor++;
4883                 if (i == max_sg_per_iu) {
4884                         put_unaligned_le64(
4885                                 (u64)io_request->sg_chain_buffer_dma_handle,
4886                                 &sg_descriptor->address);
4887                         put_unaligned_le32((sg_count - num_sg_in_iu)
4888                                 * sizeof(*sg_descriptor),
4889                                 &sg_descriptor->length);
4890                         put_unaligned_le32(CISS_SG_CHAIN,
4891                                 &sg_descriptor->flags);
4892                         chained = true;
4893                         num_sg_in_iu++;
4894                         sg_descriptor = io_request->sg_chain_buffer;
4895                 }
4896                 sg = sg_next(sg);
4897         }
4898
4899         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4900         request->partial = chained;
4901         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4902
4903 out:
4904         put_unaligned_le16(iu_length, &request->header.iu_length);
4905         request->num_sg_descriptors = num_sg_in_iu;
4906
4907         return 0;
4908 }
4909
4910 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4911         void *context)
4912 {
4913         struct scsi_cmnd *scmd;
4914
4915         scmd = io_request->scmd;
4916         pqi_free_io_request(io_request);
4917         scsi_dma_unmap(scmd);
4918         pqi_scsi_done(scmd);
4919 }
4920
4921 static int pqi_raid_submit_scsi_cmd_with_io_request(
4922         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
4923         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4924         struct pqi_queue_group *queue_group)
4925 {
4926         int rc;
4927         size_t cdb_length;
4928         struct pqi_raid_path_request *request;
4929
4930         io_request->io_complete_callback = pqi_raid_io_complete;
4931         io_request->scmd = scmd;
4932
4933         request = io_request->iu;
4934         memset(request, 0,
4935                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4936
4937         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4938         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4939         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4940         put_unaligned_le16(io_request->index, &request->request_id);
4941         request->error_index = request->request_id;
4942         memcpy(request->lun_number, device->scsi3addr,
4943                 sizeof(request->lun_number));
4944
4945         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4946         memcpy(request->cdb, scmd->cmnd, cdb_length);
4947
4948         switch (cdb_length) {
4949         case 6:
4950         case 10:
4951         case 12:
4952         case 16:
4953                 /* No bytes in the Additional CDB bytes field */
4954                 request->additional_cdb_bytes_usage =
4955                         SOP_ADDITIONAL_CDB_BYTES_0;
4956                 break;
4957         case 20:
4958                 /* 4 bytes in the Additional cdb field */
4959                 request->additional_cdb_bytes_usage =
4960                         SOP_ADDITIONAL_CDB_BYTES_4;
4961                 break;
4962         case 24:
4963                 /* 8 bytes in the Additional cdb field */
4964                 request->additional_cdb_bytes_usage =
4965                         SOP_ADDITIONAL_CDB_BYTES_8;
4966                 break;
4967         case 28:
4968                 /* 12 bytes in the Additional cdb field */
4969                 request->additional_cdb_bytes_usage =
4970                         SOP_ADDITIONAL_CDB_BYTES_12;
4971                 break;
4972         case 32:
4973         default:
4974                 /* 16 bytes in the Additional cdb field */
4975                 request->additional_cdb_bytes_usage =
4976                         SOP_ADDITIONAL_CDB_BYTES_16;
4977                 break;
4978         }
4979
4980         switch (scmd->sc_data_direction) {
4981         case DMA_TO_DEVICE:
4982                 request->data_direction = SOP_READ_FLAG;
4983                 break;
4984         case DMA_FROM_DEVICE:
4985                 request->data_direction = SOP_WRITE_FLAG;
4986                 break;
4987         case DMA_NONE:
4988                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4989                 break;
4990         case DMA_BIDIRECTIONAL:
4991                 request->data_direction = SOP_BIDIRECTIONAL;
4992                 break;
4993         default:
4994                 dev_err(&ctrl_info->pci_dev->dev,
4995                         "unknown data direction: %d\n",
4996                         scmd->sc_data_direction);
4997                 break;
4998         }
4999
5000         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
5001         if (rc) {
5002                 pqi_free_io_request(io_request);
5003                 return SCSI_MLQUEUE_HOST_BUSY;
5004         }
5005
5006         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
5007
5008         return 0;
5009 }
5010
5011 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5012         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5013         struct pqi_queue_group *queue_group)
5014 {
5015         struct pqi_io_request *io_request;
5016
5017         io_request = pqi_alloc_io_request(ctrl_info);
5018
5019         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5020                 device, scmd, queue_group);
5021 }
5022
5023 static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info)
5024 {
5025         if (!pqi_ctrl_blocked(ctrl_info))
5026                 schedule_work(&ctrl_info->raid_bypass_retry_work);
5027 }
5028
5029 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
5030 {
5031         struct scsi_cmnd *scmd;
5032         struct pqi_scsi_dev *device;
5033         struct pqi_ctrl_info *ctrl_info;
5034
5035         if (!io_request->raid_bypass)
5036                 return false;
5037
5038         scmd = io_request->scmd;
5039         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
5040                 return false;
5041         if (host_byte(scmd->result) == DID_NO_CONNECT)
5042                 return false;
5043
5044         device = scmd->device->hostdata;
5045         if (pqi_device_offline(device))
5046                 return false;
5047
5048         ctrl_info = shost_to_hba(scmd->device->host);
5049         if (pqi_ctrl_offline(ctrl_info))
5050                 return false;
5051
5052         return true;
5053 }
5054
5055 static inline void pqi_add_to_raid_bypass_retry_list(
5056         struct pqi_ctrl_info *ctrl_info,
5057         struct pqi_io_request *io_request, bool at_head)
5058 {
5059         unsigned long flags;
5060
5061         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5062         if (at_head)
5063                 list_add(&io_request->request_list_entry,
5064                         &ctrl_info->raid_bypass_retry_list);
5065         else
5066                 list_add_tail(&io_request->request_list_entry,
5067                         &ctrl_info->raid_bypass_retry_list);
5068         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5069 }
5070
5071 static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request,
5072         void *context)
5073 {
5074         struct scsi_cmnd *scmd;
5075
5076         scmd = io_request->scmd;
5077         pqi_free_io_request(io_request);
5078         pqi_scsi_done(scmd);
5079 }
5080
5081 static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request)
5082 {
5083         struct scsi_cmnd *scmd;
5084         struct pqi_ctrl_info *ctrl_info;
5085
5086         io_request->io_complete_callback = pqi_queued_raid_bypass_complete;
5087         scmd = io_request->scmd;
5088         scmd->result = 0;
5089         ctrl_info = shost_to_hba(scmd->device->host);
5090
5091         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false);
5092         pqi_schedule_bypass_retry(ctrl_info);
5093 }
5094
5095 static int pqi_retry_raid_bypass(struct pqi_io_request *io_request)
5096 {
5097         struct scsi_cmnd *scmd;
5098         struct pqi_scsi_dev *device;
5099         struct pqi_ctrl_info *ctrl_info;
5100         struct pqi_queue_group *queue_group;
5101
5102         scmd = io_request->scmd;
5103         device = scmd->device->hostdata;
5104         if (pqi_device_in_reset(device)) {
5105                 pqi_free_io_request(io_request);
5106                 set_host_byte(scmd, DID_RESET);
5107                 pqi_scsi_done(scmd);
5108                 return 0;
5109         }
5110
5111         ctrl_info = shost_to_hba(scmd->device->host);
5112         queue_group = io_request->queue_group;
5113
5114         pqi_reinit_io_request(io_request);
5115
5116         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5117                 device, scmd, queue_group);
5118 }
5119
5120 static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request(
5121         struct pqi_ctrl_info *ctrl_info)
5122 {
5123         unsigned long flags;
5124         struct pqi_io_request *io_request;
5125
5126         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5127         io_request = list_first_entry_or_null(
5128                 &ctrl_info->raid_bypass_retry_list,
5129                 struct pqi_io_request, request_list_entry);
5130         if (io_request)
5131                 list_del(&io_request->request_list_entry);
5132         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5133
5134         return io_request;
5135 }
5136
5137 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info)
5138 {
5139         int rc;
5140         struct pqi_io_request *io_request;
5141
5142         pqi_ctrl_busy(ctrl_info);
5143
5144         while (1) {
5145                 if (pqi_ctrl_blocked(ctrl_info))
5146                         break;
5147                 io_request = pqi_next_queued_raid_bypass_request(ctrl_info);
5148                 if (!io_request)
5149                         break;
5150                 rc = pqi_retry_raid_bypass(io_request);
5151                 if (rc) {
5152                         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request,
5153                                 true);
5154                         pqi_schedule_bypass_retry(ctrl_info);
5155                         break;
5156                 }
5157         }
5158
5159         pqi_ctrl_unbusy(ctrl_info);
5160 }
5161
5162 static void pqi_raid_bypass_retry_worker(struct work_struct *work)
5163 {
5164         struct pqi_ctrl_info *ctrl_info;
5165
5166         ctrl_info = container_of(work, struct pqi_ctrl_info,
5167                 raid_bypass_retry_work);
5168         pqi_retry_raid_bypass_requests(ctrl_info);
5169 }
5170
5171 static void pqi_clear_all_queued_raid_bypass_retries(
5172         struct pqi_ctrl_info *ctrl_info)
5173 {
5174         unsigned long flags;
5175
5176         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5177         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
5178         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5179 }
5180
5181 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
5182         void *context)
5183 {
5184         struct scsi_cmnd *scmd;
5185
5186         scmd = io_request->scmd;
5187         scsi_dma_unmap(scmd);
5188         if (io_request->status == -EAGAIN)
5189                 set_host_byte(scmd, DID_IMM_RETRY);
5190         else if (pqi_raid_bypass_retry_needed(io_request)) {
5191                 pqi_queue_raid_bypass_retry(io_request);
5192                 return;
5193         }
5194         pqi_free_io_request(io_request);
5195         pqi_scsi_done(scmd);
5196 }
5197
5198 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5199         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5200         struct pqi_queue_group *queue_group)
5201 {
5202         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
5203                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
5204 }
5205
5206 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
5207         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
5208         unsigned int cdb_length, struct pqi_queue_group *queue_group,
5209         struct pqi_encryption_info *encryption_info, bool raid_bypass)
5210 {
5211         int rc;
5212         struct pqi_io_request *io_request;
5213         struct pqi_aio_path_request *request;
5214
5215         io_request = pqi_alloc_io_request(ctrl_info);
5216         io_request->io_complete_callback = pqi_aio_io_complete;
5217         io_request->scmd = scmd;
5218         io_request->raid_bypass = raid_bypass;
5219
5220         request = io_request->iu;
5221         memset(request, 0,
5222                 offsetof(struct pqi_raid_path_request, sg_descriptors));
5223
5224         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
5225         put_unaligned_le32(aio_handle, &request->nexus_id);
5226         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5227         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5228         put_unaligned_le16(io_request->index, &request->request_id);
5229         request->error_index = request->request_id;
5230         if (cdb_length > sizeof(request->cdb))
5231                 cdb_length = sizeof(request->cdb);
5232         request->cdb_length = cdb_length;
5233         memcpy(request->cdb, cdb, cdb_length);
5234
5235         switch (scmd->sc_data_direction) {
5236         case DMA_TO_DEVICE:
5237                 request->data_direction = SOP_READ_FLAG;
5238                 break;
5239         case DMA_FROM_DEVICE:
5240                 request->data_direction = SOP_WRITE_FLAG;
5241                 break;
5242         case DMA_NONE:
5243                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5244                 break;
5245         case DMA_BIDIRECTIONAL:
5246                 request->data_direction = SOP_BIDIRECTIONAL;
5247                 break;
5248         default:
5249                 dev_err(&ctrl_info->pci_dev->dev,
5250                         "unknown data direction: %d\n",
5251                         scmd->sc_data_direction);
5252                 break;
5253         }
5254
5255         if (encryption_info) {
5256                 request->encryption_enable = true;
5257                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5258                         &request->data_encryption_key_index);
5259                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5260                         &request->encrypt_tweak_lower);
5261                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5262                         &request->encrypt_tweak_upper);
5263         }
5264
5265         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
5266         if (rc) {
5267                 pqi_free_io_request(io_request);
5268                 return SCSI_MLQUEUE_HOST_BUSY;
5269         }
5270
5271         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5272
5273         return 0;
5274 }
5275
5276 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
5277         struct scsi_cmnd *scmd)
5278 {
5279         u16 hw_queue;
5280
5281         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
5282         if (hw_queue > ctrl_info->max_hw_queue_index)
5283                 hw_queue = 0;
5284
5285         return hw_queue;
5286 }
5287
5288 /*
5289  * This function gets called just before we hand the completed SCSI request
5290  * back to the SML.
5291  */
5292
5293 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
5294 {
5295         struct pqi_scsi_dev *device;
5296
5297         if (!scmd->device) {
5298                 set_host_byte(scmd, DID_NO_CONNECT);
5299                 return;
5300         }
5301
5302         device = scmd->device->hostdata;
5303         if (!device) {
5304                 set_host_byte(scmd, DID_NO_CONNECT);
5305                 return;
5306         }
5307
5308         atomic_dec(&device->scsi_cmds_outstanding);
5309 }
5310
5311 static int pqi_scsi_queue_command(struct Scsi_Host *shost,
5312         struct scsi_cmnd *scmd)
5313 {
5314         int rc;
5315         struct pqi_ctrl_info *ctrl_info;
5316         struct pqi_scsi_dev *device;
5317         u16 hw_queue;
5318         struct pqi_queue_group *queue_group;
5319         bool raid_bypassed;
5320
5321         device = scmd->device->hostdata;
5322         ctrl_info = shost_to_hba(shost);
5323
5324         if (!device) {
5325                 set_host_byte(scmd, DID_NO_CONNECT);
5326                 pqi_scsi_done(scmd);
5327                 return 0;
5328         }
5329
5330         atomic_inc(&device->scsi_cmds_outstanding);
5331
5332         if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(ctrl_info,
5333                                                                 device)) {
5334                 set_host_byte(scmd, DID_NO_CONNECT);
5335                 pqi_scsi_done(scmd);
5336                 return 0;
5337         }
5338
5339         pqi_ctrl_busy(ctrl_info);
5340         if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device) ||
5341             pqi_ctrl_in_ofa(ctrl_info)) {
5342                 rc = SCSI_MLQUEUE_HOST_BUSY;
5343                 goto out;
5344         }
5345
5346         /*
5347          * This is necessary because the SML doesn't zero out this field during
5348          * error recovery.
5349          */
5350         scmd->result = 0;
5351
5352         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
5353         queue_group = &ctrl_info->queue_groups[hw_queue];
5354
5355         if (pqi_is_logical_device(device)) {
5356                 raid_bypassed = false;
5357                 if (device->raid_bypass_enabled &&
5358                                 !blk_rq_is_passthrough(scmd->request)) {
5359                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
5360                                 scmd, queue_group);
5361                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY)
5362                                 raid_bypassed = true;
5363                 }
5364                 if (!raid_bypassed)
5365                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5366                                 queue_group);
5367         } else {
5368                 if (device->aio_enabled)
5369                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
5370                                 queue_group);
5371                 else
5372                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5373                                 queue_group);
5374         }
5375
5376 out:
5377         pqi_ctrl_unbusy(ctrl_info);
5378         if (rc)
5379                 atomic_dec(&device->scsi_cmds_outstanding);
5380
5381         return rc;
5382 }
5383
5384 static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
5385         struct pqi_queue_group *queue_group)
5386 {
5387         unsigned int path;
5388         unsigned long flags;
5389         bool list_is_empty;
5390
5391         for (path = 0; path < 2; path++) {
5392                 while (1) {
5393                         spin_lock_irqsave(
5394                                 &queue_group->submit_lock[path], flags);
5395                         list_is_empty =
5396                                 list_empty(&queue_group->request_list[path]);
5397                         spin_unlock_irqrestore(
5398                                 &queue_group->submit_lock[path], flags);
5399                         if (list_is_empty)
5400                                 break;
5401                         pqi_check_ctrl_health(ctrl_info);
5402                         if (pqi_ctrl_offline(ctrl_info))
5403                                 return -ENXIO;
5404                         usleep_range(1000, 2000);
5405                 }
5406         }
5407
5408         return 0;
5409 }
5410
5411 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5412 {
5413         int rc;
5414         unsigned int i;
5415         unsigned int path;
5416         struct pqi_queue_group *queue_group;
5417         pqi_index_t iq_pi;
5418         pqi_index_t iq_ci;
5419
5420         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5421                 queue_group = &ctrl_info->queue_groups[i];
5422
5423                 rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5424                 if (rc)
5425                         return rc;
5426
5427                 for (path = 0; path < 2; path++) {
5428                         iq_pi = queue_group->iq_pi_copy[path];
5429
5430                         while (1) {
5431                                 iq_ci = readl(queue_group->iq_ci[path]);
5432                                 if (iq_ci == iq_pi)
5433                                         break;
5434                                 pqi_check_ctrl_health(ctrl_info);
5435                                 if (pqi_ctrl_offline(ctrl_info))
5436                                         return -ENXIO;
5437                                 usleep_range(1000, 2000);
5438                         }
5439                 }
5440         }
5441
5442         return 0;
5443 }
5444
5445 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5446         struct pqi_scsi_dev *device)
5447 {
5448         unsigned int i;
5449         unsigned int path;
5450         struct pqi_queue_group *queue_group;
5451         unsigned long flags;
5452         struct pqi_io_request *io_request;
5453         struct pqi_io_request *next;
5454         struct scsi_cmnd *scmd;
5455         struct pqi_scsi_dev *scsi_device;
5456
5457         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5458                 queue_group = &ctrl_info->queue_groups[i];
5459
5460                 for (path = 0; path < 2; path++) {
5461                         spin_lock_irqsave(
5462                                 &queue_group->submit_lock[path], flags);
5463
5464                         list_for_each_entry_safe(io_request, next,
5465                                 &queue_group->request_list[path],
5466                                 request_list_entry) {
5467                                 scmd = io_request->scmd;
5468                                 if (!scmd)
5469                                         continue;
5470
5471                                 scsi_device = scmd->device->hostdata;
5472                                 if (scsi_device != device)
5473                                         continue;
5474
5475                                 list_del(&io_request->request_list_entry);
5476                                 set_host_byte(scmd, DID_RESET);
5477                                 pqi_scsi_done(scmd);
5478                         }
5479
5480                         spin_unlock_irqrestore(
5481                                 &queue_group->submit_lock[path], flags);
5482                 }
5483         }
5484 }
5485
5486 static void pqi_fail_io_queued_for_all_devices(struct pqi_ctrl_info *ctrl_info)
5487 {
5488         unsigned int i;
5489         unsigned int path;
5490         struct pqi_queue_group *queue_group;
5491         unsigned long flags;
5492         struct pqi_io_request *io_request;
5493         struct pqi_io_request *next;
5494         struct scsi_cmnd *scmd;
5495
5496         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5497                 queue_group = &ctrl_info->queue_groups[i];
5498
5499                 for (path = 0; path < 2; path++) {
5500                         spin_lock_irqsave(&queue_group->submit_lock[path],
5501                                                 flags);
5502
5503                         list_for_each_entry_safe(io_request, next,
5504                                 &queue_group->request_list[path],
5505                                 request_list_entry) {
5506
5507                                 scmd = io_request->scmd;
5508                                 if (!scmd)
5509                                         continue;
5510
5511                                 list_del(&io_request->request_list_entry);
5512                                 set_host_byte(scmd, DID_RESET);
5513                                 pqi_scsi_done(scmd);
5514                         }
5515
5516                         spin_unlock_irqrestore(
5517                                 &queue_group->submit_lock[path], flags);
5518                 }
5519         }
5520 }
5521
5522 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5523         struct pqi_scsi_dev *device, unsigned long timeout_secs)
5524 {
5525         unsigned long timeout;
5526
5527         timeout = (timeout_secs * PQI_HZ) + jiffies;
5528
5529         while (atomic_read(&device->scsi_cmds_outstanding)) {
5530                 pqi_check_ctrl_health(ctrl_info);
5531                 if (pqi_ctrl_offline(ctrl_info))
5532                         return -ENXIO;
5533                 if (timeout_secs != NO_TIMEOUT) {
5534                         if (time_after(jiffies, timeout)) {
5535                                 dev_err(&ctrl_info->pci_dev->dev,
5536                                         "timed out waiting for pending IO\n");
5537                                 return -ETIMEDOUT;
5538                         }
5539                 }
5540                 usleep_range(1000, 2000);
5541         }
5542
5543         return 0;
5544 }
5545
5546 static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5547         unsigned long timeout_secs)
5548 {
5549         bool io_pending;
5550         unsigned long flags;
5551         unsigned long timeout;
5552         struct pqi_scsi_dev *device;
5553
5554         timeout = (timeout_secs * PQI_HZ) + jiffies;
5555         while (1) {
5556                 io_pending = false;
5557
5558                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5559                 list_for_each_entry(device, &ctrl_info->scsi_device_list,
5560                         scsi_device_list_entry) {
5561                         if (atomic_read(&device->scsi_cmds_outstanding)) {
5562                                 io_pending = true;
5563                                 break;
5564                         }
5565                 }
5566                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5567                                         flags);
5568
5569                 if (!io_pending)
5570                         break;
5571
5572                 pqi_check_ctrl_health(ctrl_info);
5573                 if (pqi_ctrl_offline(ctrl_info))
5574                         return -ENXIO;
5575
5576                 if (timeout_secs != NO_TIMEOUT) {
5577                         if (time_after(jiffies, timeout)) {
5578                                 dev_err(&ctrl_info->pci_dev->dev,
5579                                         "timed out waiting for pending IO\n");
5580                                 return -ETIMEDOUT;
5581                         }
5582                 }
5583                 usleep_range(1000, 2000);
5584         }
5585
5586         return 0;
5587 }
5588
5589 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5590         void *context)
5591 {
5592         struct completion *waiting = context;
5593
5594         complete(waiting);
5595 }
5596
5597 #define PQI_LUN_RESET_TIMEOUT_SECS      10
5598
5599 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5600         struct pqi_scsi_dev *device, struct completion *wait)
5601 {
5602         int rc;
5603
5604         while (1) {
5605                 if (wait_for_completion_io_timeout(wait,
5606                         PQI_LUN_RESET_TIMEOUT_SECS * PQI_HZ)) {
5607                         rc = 0;
5608                         break;
5609                 }
5610
5611                 pqi_check_ctrl_health(ctrl_info);
5612                 if (pqi_ctrl_offline(ctrl_info)) {
5613                         rc = -ENXIO;
5614                         break;
5615                 }
5616         }
5617
5618         return rc;
5619 }
5620
5621 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
5622         struct pqi_scsi_dev *device)
5623 {
5624         int rc;
5625         struct pqi_io_request *io_request;
5626         DECLARE_COMPLETION_ONSTACK(wait);
5627         struct pqi_task_management_request *request;
5628
5629         io_request = pqi_alloc_io_request(ctrl_info);
5630         io_request->io_complete_callback = pqi_lun_reset_complete;
5631         io_request->context = &wait;
5632
5633         request = io_request->iu;
5634         memset(request, 0, sizeof(*request));
5635
5636         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5637         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5638                 &request->header.iu_length);
5639         put_unaligned_le16(io_request->index, &request->request_id);
5640         memcpy(request->lun_number, device->scsi3addr,
5641                 sizeof(request->lun_number));
5642         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5643
5644         pqi_start_io(ctrl_info,
5645                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5646                 io_request);
5647
5648         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5649         if (rc == 0)
5650                 rc = io_request->status;
5651
5652         pqi_free_io_request(io_request);
5653
5654         return rc;
5655 }
5656
5657 #define PQI_LUN_RESET_RETRIES                   3
5658 #define PQI_LUN_RESET_RETRY_INTERVAL_MSECS      10000
5659 /* Performs a reset at the LUN level. */
5660
5661 static int _pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5662         struct pqi_scsi_dev *device)
5663 {
5664         int rc;
5665         unsigned int retries;
5666         unsigned long timeout_secs;
5667
5668         for (retries = 0;;) {
5669                 rc = pqi_lun_reset(ctrl_info, device);
5670                 if (rc != -EAGAIN ||
5671                     ++retries > PQI_LUN_RESET_RETRIES)
5672                         break;
5673                 msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
5674         }
5675         timeout_secs = rc ? PQI_LUN_RESET_TIMEOUT_SECS : NO_TIMEOUT;
5676
5677         rc |= pqi_device_wait_for_pending_io(ctrl_info, device, timeout_secs);
5678
5679         return rc == 0 ? SUCCESS : FAILED;
5680 }
5681
5682 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5683         struct pqi_scsi_dev *device)
5684 {
5685         int rc;
5686
5687         mutex_lock(&ctrl_info->lun_reset_mutex);
5688
5689         pqi_ctrl_block_requests(ctrl_info);
5690         pqi_ctrl_wait_until_quiesced(ctrl_info);
5691         pqi_fail_io_queued_for_device(ctrl_info, device);
5692         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
5693         pqi_device_reset_start(device);
5694         pqi_ctrl_unblock_requests(ctrl_info);
5695
5696         if (rc)
5697                 rc = FAILED;
5698         else
5699                 rc = _pqi_device_reset(ctrl_info, device);
5700
5701         pqi_device_reset_done(device);
5702
5703         mutex_unlock(&ctrl_info->lun_reset_mutex);
5704         return rc;
5705 }
5706
5707 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
5708 {
5709         int rc;
5710         struct Scsi_Host *shost;
5711         struct pqi_ctrl_info *ctrl_info;
5712         struct pqi_scsi_dev *device;
5713
5714         shost = scmd->device->host;
5715         ctrl_info = shost_to_hba(shost);
5716         device = scmd->device->hostdata;
5717
5718         dev_err(&ctrl_info->pci_dev->dev,
5719                 "resetting scsi %d:%d:%d:%d\n",
5720                 shost->host_no, device->bus, device->target, device->lun);
5721
5722         pqi_check_ctrl_health(ctrl_info);
5723         if (pqi_ctrl_offline(ctrl_info)) {
5724                 dev_err(&ctrl_info->pci_dev->dev,
5725                         "controller %u offlined - cannot send device reset\n",
5726                         ctrl_info->ctrl_id);
5727                 rc = FAILED;
5728                 goto out;
5729         }
5730
5731         pqi_wait_until_ofa_finished(ctrl_info);
5732
5733         rc = pqi_device_reset(ctrl_info, device);
5734 out:
5735         dev_err(&ctrl_info->pci_dev->dev,
5736                 "reset of scsi %d:%d:%d:%d: %s\n",
5737                 shost->host_no, device->bus, device->target, device->lun,
5738                 rc == SUCCESS ? "SUCCESS" : "FAILED");
5739
5740         return rc;
5741 }
5742
5743 static int pqi_slave_alloc(struct scsi_device *sdev)
5744 {
5745         struct pqi_scsi_dev *device;
5746         unsigned long flags;
5747         struct pqi_ctrl_info *ctrl_info;
5748         struct scsi_target *starget;
5749         struct sas_rphy *rphy;
5750
5751         ctrl_info = shost_to_hba(sdev->host);
5752
5753         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5754
5755         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
5756                 starget = scsi_target(sdev);
5757                 rphy = target_to_rphy(starget);
5758                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
5759                 if (device) {
5760                         device->target = sdev_id(sdev);
5761                         device->lun = sdev->lun;
5762                         device->target_lun_valid = true;
5763                 }
5764         } else {
5765                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
5766                         sdev_id(sdev), sdev->lun);
5767         }
5768
5769         if (device) {
5770                 sdev->hostdata = device;
5771                 device->sdev = sdev;
5772                 if (device->queue_depth) {
5773                         device->advertised_queue_depth = device->queue_depth;
5774                         scsi_change_queue_depth(sdev,
5775                                 device->advertised_queue_depth);
5776                 }
5777                 if (pqi_is_logical_device(device))
5778                         pqi_disable_write_same(sdev);
5779                 else
5780                         sdev->allow_restart = 1;
5781         }
5782
5783         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5784
5785         return 0;
5786 }
5787
5788 static int pqi_map_queues(struct Scsi_Host *shost)
5789 {
5790         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
5791
5792         return blk_mq_pci_map_queues(&shost->tag_set.map[0],
5793                                         ctrl_info->pci_dev, 0);
5794 }
5795
5796 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
5797         void __user *arg)
5798 {
5799         struct pci_dev *pci_dev;
5800         u32 subsystem_vendor;
5801         u32 subsystem_device;
5802         cciss_pci_info_struct pciinfo;
5803
5804         if (!arg)
5805                 return -EINVAL;
5806
5807         pci_dev = ctrl_info->pci_dev;
5808
5809         pciinfo.domain = pci_domain_nr(pci_dev->bus);
5810         pciinfo.bus = pci_dev->bus->number;
5811         pciinfo.dev_fn = pci_dev->devfn;
5812         subsystem_vendor = pci_dev->subsystem_vendor;
5813         subsystem_device = pci_dev->subsystem_device;
5814         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
5815                 subsystem_vendor;
5816
5817         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
5818                 return -EFAULT;
5819
5820         return 0;
5821 }
5822
5823 static int pqi_getdrivver_ioctl(void __user *arg)
5824 {
5825         u32 version;
5826
5827         if (!arg)
5828                 return -EINVAL;
5829
5830         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
5831                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
5832
5833         if (copy_to_user(arg, &version, sizeof(version)))
5834                 return -EFAULT;
5835
5836         return 0;
5837 }
5838
5839 struct ciss_error_info {
5840         u8      scsi_status;
5841         int     command_status;
5842         size_t  sense_data_length;
5843 };
5844
5845 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
5846         struct ciss_error_info *ciss_error_info)
5847 {
5848         int ciss_cmd_status;
5849         size_t sense_data_length;
5850
5851         switch (pqi_error_info->data_out_result) {
5852         case PQI_DATA_IN_OUT_GOOD:
5853                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
5854                 break;
5855         case PQI_DATA_IN_OUT_UNDERFLOW:
5856                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
5857                 break;
5858         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
5859                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
5860                 break;
5861         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
5862         case PQI_DATA_IN_OUT_BUFFER_ERROR:
5863         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
5864         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
5865         case PQI_DATA_IN_OUT_ERROR:
5866                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
5867                 break;
5868         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
5869         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
5870         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
5871         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
5872         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
5873         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
5874         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
5875         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
5876         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
5877         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
5878                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
5879                 break;
5880         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
5881                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
5882                 break;
5883         case PQI_DATA_IN_OUT_ABORTED:
5884                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
5885                 break;
5886         case PQI_DATA_IN_OUT_TIMEOUT:
5887                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
5888                 break;
5889         default:
5890                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
5891                 break;
5892         }
5893
5894         sense_data_length =
5895                 get_unaligned_le16(&pqi_error_info->sense_data_length);
5896         if (sense_data_length == 0)
5897                 sense_data_length =
5898                 get_unaligned_le16(&pqi_error_info->response_data_length);
5899         if (sense_data_length)
5900                 if (sense_data_length > sizeof(pqi_error_info->data))
5901                         sense_data_length = sizeof(pqi_error_info->data);
5902
5903         ciss_error_info->scsi_status = pqi_error_info->status;
5904         ciss_error_info->command_status = ciss_cmd_status;
5905         ciss_error_info->sense_data_length = sense_data_length;
5906 }
5907
5908 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5909 {
5910         int rc;
5911         char *kernel_buffer = NULL;
5912         u16 iu_length;
5913         size_t sense_data_length;
5914         IOCTL_Command_struct iocommand;
5915         struct pqi_raid_path_request request;
5916         struct pqi_raid_error_info pqi_error_info;
5917         struct ciss_error_info ciss_error_info;
5918
5919         if (pqi_ctrl_offline(ctrl_info))
5920                 return -ENXIO;
5921         if (!arg)
5922                 return -EINVAL;
5923         if (!capable(CAP_SYS_RAWIO))
5924                 return -EPERM;
5925         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
5926                 return -EFAULT;
5927         if (iocommand.buf_size < 1 &&
5928                 iocommand.Request.Type.Direction != XFER_NONE)
5929                 return -EINVAL;
5930         if (iocommand.Request.CDBLen > sizeof(request.cdb))
5931                 return -EINVAL;
5932         if (iocommand.Request.Type.Type != TYPE_CMD)
5933                 return -EINVAL;
5934
5935         switch (iocommand.Request.Type.Direction) {
5936         case XFER_NONE:
5937         case XFER_WRITE:
5938         case XFER_READ:
5939         case XFER_READ | XFER_WRITE:
5940                 break;
5941         default:
5942                 return -EINVAL;
5943         }
5944
5945         if (iocommand.buf_size > 0) {
5946                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
5947                 if (!kernel_buffer)
5948                         return -ENOMEM;
5949                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
5950                         if (copy_from_user(kernel_buffer, iocommand.buf,
5951                                 iocommand.buf_size)) {
5952                                 rc = -EFAULT;
5953                                 goto out;
5954                         }
5955                 } else {
5956                         memset(kernel_buffer, 0, iocommand.buf_size);
5957                 }
5958         }
5959
5960         memset(&request, 0, sizeof(request));
5961
5962         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5963         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5964                 PQI_REQUEST_HEADER_LENGTH;
5965         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
5966                 sizeof(request.lun_number));
5967         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
5968         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5969
5970         switch (iocommand.Request.Type.Direction) {
5971         case XFER_NONE:
5972                 request.data_direction = SOP_NO_DIRECTION_FLAG;
5973                 break;
5974         case XFER_WRITE:
5975                 request.data_direction = SOP_WRITE_FLAG;
5976                 break;
5977         case XFER_READ:
5978                 request.data_direction = SOP_READ_FLAG;
5979                 break;
5980         case XFER_READ | XFER_WRITE:
5981                 request.data_direction = SOP_BIDIRECTIONAL;
5982                 break;
5983         }
5984
5985         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5986
5987         if (iocommand.buf_size > 0) {
5988                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
5989
5990                 rc = pqi_map_single(ctrl_info->pci_dev,
5991                         &request.sg_descriptors[0], kernel_buffer,
5992                         iocommand.buf_size, DMA_BIDIRECTIONAL);
5993                 if (rc)
5994                         goto out;
5995
5996                 iu_length += sizeof(request.sg_descriptors[0]);
5997         }
5998
5999         put_unaligned_le16(iu_length, &request.header.iu_length);
6000
6001         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6002                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
6003
6004         if (iocommand.buf_size > 0)
6005                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
6006                         DMA_BIDIRECTIONAL);
6007
6008         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
6009
6010         if (rc == 0) {
6011                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
6012                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
6013                 iocommand.error_info.CommandStatus =
6014                         ciss_error_info.command_status;
6015                 sense_data_length = ciss_error_info.sense_data_length;
6016                 if (sense_data_length) {
6017                         if (sense_data_length >
6018                                 sizeof(iocommand.error_info.SenseInfo))
6019                                 sense_data_length =
6020                                         sizeof(iocommand.error_info.SenseInfo);
6021                         memcpy(iocommand.error_info.SenseInfo,
6022                                 pqi_error_info.data, sense_data_length);
6023                         iocommand.error_info.SenseLen = sense_data_length;
6024                 }
6025         }
6026
6027         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
6028                 rc = -EFAULT;
6029                 goto out;
6030         }
6031
6032         if (rc == 0 && iocommand.buf_size > 0 &&
6033                 (iocommand.Request.Type.Direction & XFER_READ)) {
6034                 if (copy_to_user(iocommand.buf, kernel_buffer,
6035                         iocommand.buf_size)) {
6036                         rc = -EFAULT;
6037                 }
6038         }
6039
6040 out:
6041         kfree(kernel_buffer);
6042
6043         return rc;
6044 }
6045
6046 static int pqi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
6047 {
6048         int rc;
6049         struct pqi_ctrl_info *ctrl_info;
6050
6051         ctrl_info = shost_to_hba(sdev->host);
6052
6053         if (pqi_ctrl_in_ofa(ctrl_info))
6054                 return -EBUSY;
6055
6056         switch (cmd) {
6057         case CCISS_DEREGDISK:
6058         case CCISS_REGNEWDISK:
6059         case CCISS_REGNEWD:
6060                 rc = pqi_scan_scsi_devices(ctrl_info);
6061                 break;
6062         case CCISS_GETPCIINFO:
6063                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
6064                 break;
6065         case CCISS_GETDRIVVER:
6066                 rc = pqi_getdrivver_ioctl(arg);
6067                 break;
6068         case CCISS_PASSTHRU:
6069                 rc = pqi_passthru_ioctl(ctrl_info, arg);
6070                 break;
6071         default:
6072                 rc = -EINVAL;
6073                 break;
6074         }
6075
6076         return rc;
6077 }
6078
6079 static ssize_t pqi_version_show(struct device *dev,
6080         struct device_attribute *attr, char *buffer)
6081 {
6082         ssize_t count = 0;
6083         struct Scsi_Host *shost;
6084         struct pqi_ctrl_info *ctrl_info;
6085
6086         shost = class_to_shost(dev);
6087         ctrl_info = shost_to_hba(shost);
6088
6089         count += snprintf(buffer + count, PAGE_SIZE - count,
6090                 "  driver: %s\n", DRIVER_VERSION BUILD_TIMESTAMP);
6091
6092         count += snprintf(buffer + count, PAGE_SIZE - count,
6093                 "firmware: %s\n", ctrl_info->firmware_version);
6094
6095         return count;
6096 }
6097
6098 static ssize_t pqi_host_rescan_store(struct device *dev,
6099         struct device_attribute *attr, const char *buffer, size_t count)
6100 {
6101         struct Scsi_Host *shost = class_to_shost(dev);
6102
6103         pqi_scan_start(shost);
6104
6105         return count;
6106 }
6107
6108 static ssize_t pqi_lockup_action_show(struct device *dev,
6109         struct device_attribute *attr, char *buffer)
6110 {
6111         int count = 0;
6112         unsigned int i;
6113
6114         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6115                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
6116                         count += snprintf(buffer + count, PAGE_SIZE - count,
6117                                 "[%s] ", pqi_lockup_actions[i].name);
6118                 else
6119                         count += snprintf(buffer + count, PAGE_SIZE - count,
6120                                 "%s ", pqi_lockup_actions[i].name);
6121         }
6122
6123         count += snprintf(buffer + count, PAGE_SIZE - count, "\n");
6124
6125         return count;
6126 }
6127
6128 static ssize_t pqi_lockup_action_store(struct device *dev,
6129         struct device_attribute *attr, const char *buffer, size_t count)
6130 {
6131         unsigned int i;
6132         char *action_name;
6133         char action_name_buffer[32];
6134
6135         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
6136         action_name = strstrip(action_name_buffer);
6137
6138         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6139                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
6140                         pqi_lockup_action = pqi_lockup_actions[i].action;
6141                         return count;
6142                 }
6143         }
6144
6145         return -EINVAL;
6146 }
6147
6148 static DEVICE_ATTR(version, 0444, pqi_version_show, NULL);
6149 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
6150 static DEVICE_ATTR(lockup_action, 0644,
6151         pqi_lockup_action_show, pqi_lockup_action_store);
6152
6153 static struct device_attribute *pqi_shost_attrs[] = {
6154         &dev_attr_version,
6155         &dev_attr_rescan,
6156         &dev_attr_lockup_action,
6157         NULL
6158 };
6159
6160 static ssize_t pqi_unique_id_show(struct device *dev,
6161         struct device_attribute *attr, char *buffer)
6162 {
6163         struct pqi_ctrl_info *ctrl_info;
6164         struct scsi_device *sdev;
6165         struct pqi_scsi_dev *device;
6166         unsigned long flags;
6167         unsigned char uid[16];
6168
6169         sdev = to_scsi_device(dev);
6170         ctrl_info = shost_to_hba(sdev->host);
6171
6172         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6173
6174         device = sdev->hostdata;
6175         if (!device) {
6176                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6177                         flags);
6178                 return -ENODEV;
6179         }
6180         memcpy(uid, device->unique_id, sizeof(uid));
6181
6182         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6183
6184         return snprintf(buffer, PAGE_SIZE,
6185                 "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X\n",
6186                 uid[0], uid[1], uid[2], uid[3],
6187                 uid[4], uid[5], uid[6], uid[7],
6188                 uid[8], uid[9], uid[10], uid[11],
6189                 uid[12], uid[13], uid[14], uid[15]);
6190 }
6191
6192 static ssize_t pqi_lunid_show(struct device *dev,
6193         struct device_attribute *attr, char *buffer)
6194 {
6195         struct pqi_ctrl_info *ctrl_info;
6196         struct scsi_device *sdev;
6197         struct pqi_scsi_dev *device;
6198         unsigned long flags;
6199         u8 lunid[8];
6200
6201         sdev = to_scsi_device(dev);
6202         ctrl_info = shost_to_hba(sdev->host);
6203
6204         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6205
6206         device = sdev->hostdata;
6207         if (!device) {
6208                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6209                         flags);
6210                 return -ENODEV;
6211         }
6212         memcpy(lunid, device->scsi3addr, sizeof(lunid));
6213
6214         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6215
6216         return snprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid);
6217 }
6218
6219 #define MAX_PATHS 8
6220 static ssize_t pqi_path_info_show(struct device *dev,
6221         struct device_attribute *attr, char *buf)
6222 {
6223         struct pqi_ctrl_info *ctrl_info;
6224         struct scsi_device *sdev;
6225         struct pqi_scsi_dev *device;
6226         unsigned long flags;
6227         int i;
6228         int output_len = 0;
6229         u8 box;
6230         u8 bay;
6231         u8 path_map_index = 0;
6232         char *active;
6233         unsigned char phys_connector[2];
6234
6235         sdev = to_scsi_device(dev);
6236         ctrl_info = shost_to_hba(sdev->host);
6237
6238         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6239
6240         device = sdev->hostdata;
6241         if (!device) {
6242                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6243                         flags);
6244                 return -ENODEV;
6245         }
6246
6247         bay = device->bay;
6248         for (i = 0; i < MAX_PATHS; i++) {
6249                 path_map_index = 1<<i;
6250                 if (i == device->active_path_index)
6251                         active = "Active";
6252                 else if (device->path_map & path_map_index)
6253                         active = "Inactive";
6254                 else
6255                         continue;
6256
6257                 output_len += scnprintf(buf + output_len,
6258                                         PAGE_SIZE - output_len,
6259                                         "[%d:%d:%d:%d] %20.20s ",
6260                                         ctrl_info->scsi_host->host_no,
6261                                         device->bus, device->target,
6262                                         device->lun,
6263                                         scsi_device_type(device->devtype));
6264
6265                 if (device->devtype == TYPE_RAID ||
6266                         pqi_is_logical_device(device))
6267                         goto end_buffer;
6268
6269                 memcpy(&phys_connector, &device->phys_connector[i],
6270                         sizeof(phys_connector));
6271                 if (phys_connector[0] < '0')
6272                         phys_connector[0] = '0';
6273                 if (phys_connector[1] < '0')
6274                         phys_connector[1] = '0';
6275
6276                 output_len += scnprintf(buf + output_len,
6277                                         PAGE_SIZE - output_len,
6278                                         "PORT: %.2s ", phys_connector);
6279
6280                 box = device->box[i];
6281                 if (box != 0 && box != 0xFF)
6282                         output_len += scnprintf(buf + output_len,
6283                                                 PAGE_SIZE - output_len,
6284                                                 "BOX: %hhu ", box);
6285
6286                 if ((device->devtype == TYPE_DISK ||
6287                         device->devtype == TYPE_ZBC) &&
6288                         pqi_expose_device(device))
6289                         output_len += scnprintf(buf + output_len,
6290                                                 PAGE_SIZE - output_len,
6291                                                 "BAY: %hhu ", bay);
6292
6293 end_buffer:
6294                 output_len += scnprintf(buf + output_len,
6295                                         PAGE_SIZE - output_len,
6296                                         "%s\n", active);
6297         }
6298
6299         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6300         return output_len;
6301 }
6302
6303
6304 static ssize_t pqi_sas_address_show(struct device *dev,
6305         struct device_attribute *attr, char *buffer)
6306 {
6307         struct pqi_ctrl_info *ctrl_info;
6308         struct scsi_device *sdev;
6309         struct pqi_scsi_dev *device;
6310         unsigned long flags;
6311         u64 sas_address;
6312
6313         sdev = to_scsi_device(dev);
6314         ctrl_info = shost_to_hba(sdev->host);
6315
6316         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6317
6318         device = sdev->hostdata;
6319         if (pqi_is_logical_device(device)) {
6320                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6321                         flags);
6322                 return -ENODEV;
6323         }
6324         sas_address = device->sas_address;
6325
6326         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6327
6328         return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
6329 }
6330
6331 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
6332         struct device_attribute *attr, char *buffer)
6333 {
6334         struct pqi_ctrl_info *ctrl_info;
6335         struct scsi_device *sdev;
6336         struct pqi_scsi_dev *device;
6337         unsigned long flags;
6338
6339         sdev = to_scsi_device(dev);
6340         ctrl_info = shost_to_hba(sdev->host);
6341
6342         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6343
6344         device = sdev->hostdata;
6345         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
6346         buffer[1] = '\n';
6347         buffer[2] = '\0';
6348
6349         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6350
6351         return 2;
6352 }
6353
6354 static ssize_t pqi_raid_level_show(struct device *dev,
6355         struct device_attribute *attr, char *buffer)
6356 {
6357         struct pqi_ctrl_info *ctrl_info;
6358         struct scsi_device *sdev;
6359         struct pqi_scsi_dev *device;
6360         unsigned long flags;
6361         char *raid_level;
6362
6363         sdev = to_scsi_device(dev);
6364         ctrl_info = shost_to_hba(sdev->host);
6365
6366         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6367
6368         device = sdev->hostdata;
6369
6370         if (pqi_is_logical_device(device))
6371                 raid_level = pqi_raid_level_to_string(device->raid_level);
6372         else
6373                 raid_level = "N/A";
6374
6375         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6376
6377         return snprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
6378 }
6379
6380 static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL);
6381 static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL);
6382 static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL);
6383 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
6384 static DEVICE_ATTR(ssd_smart_path_enabled, 0444,
6385         pqi_ssd_smart_path_enabled_show, NULL);
6386 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
6387
6388 static struct device_attribute *pqi_sdev_attrs[] = {
6389         &dev_attr_lunid,
6390         &dev_attr_unique_id,
6391         &dev_attr_path_info,
6392         &dev_attr_sas_address,
6393         &dev_attr_ssd_smart_path_enabled,
6394         &dev_attr_raid_level,
6395         NULL
6396 };
6397
6398 static struct scsi_host_template pqi_driver_template = {
6399         .module = THIS_MODULE,
6400         .name = DRIVER_NAME_SHORT,
6401         .proc_name = DRIVER_NAME_SHORT,
6402         .queuecommand = pqi_scsi_queue_command,
6403         .scan_start = pqi_scan_start,
6404         .scan_finished = pqi_scan_finished,
6405         .this_id = -1,
6406         .eh_device_reset_handler = pqi_eh_device_reset_handler,
6407         .ioctl = pqi_ioctl,
6408         .slave_alloc = pqi_slave_alloc,
6409         .map_queues = pqi_map_queues,
6410         .sdev_attrs = pqi_sdev_attrs,
6411         .shost_attrs = pqi_shost_attrs,
6412 };
6413
6414 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
6415 {
6416         int rc;
6417         struct Scsi_Host *shost;
6418
6419         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
6420         if (!shost) {
6421                 dev_err(&ctrl_info->pci_dev->dev,
6422                         "scsi_host_alloc failed for controller %u\n",
6423                         ctrl_info->ctrl_id);
6424                 return -ENOMEM;
6425         }
6426
6427         shost->io_port = 0;
6428         shost->n_io_port = 0;
6429         shost->this_id = -1;
6430         shost->max_channel = PQI_MAX_BUS;
6431         shost->max_cmd_len = MAX_COMMAND_SIZE;
6432         shost->max_lun = ~0;
6433         shost->max_id = ~0;
6434         shost->max_sectors = ctrl_info->max_sectors;
6435         shost->can_queue = ctrl_info->scsi_ml_can_queue;
6436         shost->cmd_per_lun = shost->can_queue;
6437         shost->sg_tablesize = ctrl_info->sg_tablesize;
6438         shost->transportt = pqi_sas_transport_template;
6439         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
6440         shost->unique_id = shost->irq;
6441         shost->nr_hw_queues = ctrl_info->num_queue_groups;
6442         shost->hostdata[0] = (unsigned long)ctrl_info;
6443
6444         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
6445         if (rc) {
6446                 dev_err(&ctrl_info->pci_dev->dev,
6447                         "scsi_add_host failed for controller %u\n",
6448                         ctrl_info->ctrl_id);
6449                 goto free_host;
6450         }
6451
6452         rc = pqi_add_sas_host(shost, ctrl_info);
6453         if (rc) {
6454                 dev_err(&ctrl_info->pci_dev->dev,
6455                         "add SAS host failed for controller %u\n",
6456                         ctrl_info->ctrl_id);
6457                 goto remove_host;
6458         }
6459
6460         ctrl_info->scsi_host = shost;
6461
6462         return 0;
6463
6464 remove_host:
6465         scsi_remove_host(shost);
6466 free_host:
6467         scsi_host_put(shost);
6468
6469         return rc;
6470 }
6471
6472 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
6473 {
6474         struct Scsi_Host *shost;
6475
6476         pqi_delete_sas_host(ctrl_info);
6477
6478         shost = ctrl_info->scsi_host;
6479         if (!shost)
6480                 return;
6481
6482         scsi_remove_host(shost);
6483         scsi_host_put(shost);
6484 }
6485
6486 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
6487 {
6488         int rc = 0;
6489         struct pqi_device_registers __iomem *pqi_registers;
6490         unsigned long timeout;
6491         unsigned int timeout_msecs;
6492         union pqi_reset_register reset_reg;
6493
6494         pqi_registers = ctrl_info->pqi_registers;
6495         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
6496         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
6497
6498         while (1) {
6499                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
6500                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
6501                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
6502                         break;
6503                 pqi_check_ctrl_health(ctrl_info);
6504                 if (pqi_ctrl_offline(ctrl_info)) {
6505                         rc = -ENXIO;
6506                         break;
6507                 }
6508                 if (time_after(jiffies, timeout)) {
6509                         rc = -ETIMEDOUT;
6510                         break;
6511                 }
6512         }
6513
6514         return rc;
6515 }
6516
6517 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
6518 {
6519         int rc;
6520         union pqi_reset_register reset_reg;
6521
6522         if (ctrl_info->pqi_reset_quiesce_supported) {
6523                 rc = sis_pqi_reset_quiesce(ctrl_info);
6524                 if (rc) {
6525                         dev_err(&ctrl_info->pci_dev->dev,
6526                                 "PQI reset failed during quiesce with error %d\n",
6527                                 rc);
6528                         return rc;
6529                 }
6530         }
6531
6532         reset_reg.all_bits = 0;
6533         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
6534         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
6535
6536         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
6537
6538         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
6539         if (rc)
6540                 dev_err(&ctrl_info->pci_dev->dev,
6541                         "PQI reset failed with error %d\n", rc);
6542
6543         return rc;
6544 }
6545
6546 static int pqi_get_ctrl_firmware_version(struct pqi_ctrl_info *ctrl_info)
6547 {
6548         int rc;
6549         struct bmic_identify_controller *identify;
6550
6551         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
6552         if (!identify)
6553                 return -ENOMEM;
6554
6555         rc = pqi_identify_controller(ctrl_info, identify);
6556         if (rc)
6557                 goto out;
6558
6559         memcpy(ctrl_info->firmware_version, identify->firmware_version,
6560                 sizeof(identify->firmware_version));
6561         ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
6562         snprintf(ctrl_info->firmware_version +
6563                 strlen(ctrl_info->firmware_version),
6564                 sizeof(ctrl_info->firmware_version),
6565                 "-%u", get_unaligned_le16(&identify->firmware_build_number));
6566
6567 out:
6568         kfree(identify);
6569
6570         return rc;
6571 }
6572
6573 struct pqi_config_table_section_info {
6574         struct pqi_ctrl_info *ctrl_info;
6575         void            *section;
6576         u32             section_offset;
6577         void __iomem    *section_iomem_addr;
6578 };
6579
6580 static inline bool pqi_is_firmware_feature_supported(
6581         struct pqi_config_table_firmware_features *firmware_features,
6582         unsigned int bit_position)
6583 {
6584         unsigned int byte_index;
6585
6586         byte_index = bit_position / BITS_PER_BYTE;
6587
6588         if (byte_index >= le16_to_cpu(firmware_features->num_elements))
6589                 return false;
6590
6591         return firmware_features->features_supported[byte_index] &
6592                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
6593 }
6594
6595 static inline bool pqi_is_firmware_feature_enabled(
6596         struct pqi_config_table_firmware_features *firmware_features,
6597         void __iomem *firmware_features_iomem_addr,
6598         unsigned int bit_position)
6599 {
6600         unsigned int byte_index;
6601         u8 __iomem *features_enabled_iomem_addr;
6602
6603         byte_index = (bit_position / BITS_PER_BYTE) +
6604                 (le16_to_cpu(firmware_features->num_elements) * 2);
6605
6606         features_enabled_iomem_addr = firmware_features_iomem_addr +
6607                 offsetof(struct pqi_config_table_firmware_features,
6608                         features_supported) + byte_index;
6609
6610         return *((__force u8 *)features_enabled_iomem_addr) &
6611                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
6612 }
6613
6614 static inline void pqi_request_firmware_feature(
6615         struct pqi_config_table_firmware_features *firmware_features,
6616         unsigned int bit_position)
6617 {
6618         unsigned int byte_index;
6619
6620         byte_index = (bit_position / BITS_PER_BYTE) +
6621                 le16_to_cpu(firmware_features->num_elements);
6622
6623         firmware_features->features_supported[byte_index] |=
6624                 (1 << (bit_position % BITS_PER_BYTE));
6625 }
6626
6627 static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info,
6628         u16 first_section, u16 last_section)
6629 {
6630         struct pqi_vendor_general_request request;
6631
6632         memset(&request, 0, sizeof(request));
6633
6634         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
6635         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
6636                 &request.header.iu_length);
6637         put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE,
6638                 &request.function_code);
6639         put_unaligned_le16(first_section,
6640                 &request.data.config_table_update.first_section);
6641         put_unaligned_le16(last_section,
6642                 &request.data.config_table_update.last_section);
6643
6644         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6645                 0, NULL, NO_TIMEOUT);
6646 }
6647
6648 static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
6649         struct pqi_config_table_firmware_features *firmware_features,
6650         void __iomem *firmware_features_iomem_addr)
6651 {
6652         void *features_requested;
6653         void __iomem *features_requested_iomem_addr;
6654
6655         features_requested = firmware_features->features_supported +
6656                 le16_to_cpu(firmware_features->num_elements);
6657
6658         features_requested_iomem_addr = firmware_features_iomem_addr +
6659                 (features_requested - (void *)firmware_features);
6660
6661         memcpy_toio(features_requested_iomem_addr, features_requested,
6662                 le16_to_cpu(firmware_features->num_elements));
6663
6664         return pqi_config_table_update(ctrl_info,
6665                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES,
6666                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES);
6667 }
6668
6669 struct pqi_firmware_feature {
6670         char            *feature_name;
6671         unsigned int    feature_bit;
6672         bool            supported;
6673         bool            enabled;
6674         void (*feature_status)(struct pqi_ctrl_info *ctrl_info,
6675                 struct pqi_firmware_feature *firmware_feature);
6676 };
6677
6678 static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info,
6679         struct pqi_firmware_feature *firmware_feature)
6680 {
6681         if (!firmware_feature->supported) {
6682                 dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n",
6683                         firmware_feature->feature_name);
6684                 return;
6685         }
6686
6687         if (firmware_feature->enabled) {
6688                 dev_info(&ctrl_info->pci_dev->dev,
6689                         "%s enabled\n", firmware_feature->feature_name);
6690                 return;
6691         }
6692
6693         dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n",
6694                 firmware_feature->feature_name);
6695 }
6696
6697 static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info,
6698         struct pqi_firmware_feature *firmware_feature)
6699 {
6700         if (firmware_feature->feature_status)
6701                 firmware_feature->feature_status(ctrl_info, firmware_feature);
6702 }
6703
6704 static DEFINE_MUTEX(pqi_firmware_features_mutex);
6705
6706 static struct pqi_firmware_feature pqi_firmware_features[] = {
6707         {
6708                 .feature_name = "Online Firmware Activation",
6709                 .feature_bit = PQI_FIRMWARE_FEATURE_OFA,
6710                 .feature_status = pqi_firmware_feature_status,
6711         },
6712         {
6713                 .feature_name = "Serial Management Protocol",
6714                 .feature_bit = PQI_FIRMWARE_FEATURE_SMP,
6715                 .feature_status = pqi_firmware_feature_status,
6716         },
6717         {
6718                 .feature_name = "New Soft Reset Handshake",
6719                 .feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE,
6720                 .feature_status = pqi_firmware_feature_status,
6721         },
6722 };
6723
6724 static void pqi_process_firmware_features(
6725         struct pqi_config_table_section_info *section_info)
6726 {
6727         int rc;
6728         struct pqi_ctrl_info *ctrl_info;
6729         struct pqi_config_table_firmware_features *firmware_features;
6730         void __iomem *firmware_features_iomem_addr;
6731         unsigned int i;
6732         unsigned int num_features_supported;
6733
6734         ctrl_info = section_info->ctrl_info;
6735         firmware_features = section_info->section;
6736         firmware_features_iomem_addr = section_info->section_iomem_addr;
6737
6738         for (i = 0, num_features_supported = 0;
6739                 i < ARRAY_SIZE(pqi_firmware_features); i++) {
6740                 if (pqi_is_firmware_feature_supported(firmware_features,
6741                         pqi_firmware_features[i].feature_bit)) {
6742                         pqi_firmware_features[i].supported = true;
6743                         num_features_supported++;
6744                 } else {
6745                         pqi_firmware_feature_update(ctrl_info,
6746                                 &pqi_firmware_features[i]);
6747                 }
6748         }
6749
6750         if (num_features_supported == 0)
6751                 return;
6752
6753         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6754                 if (!pqi_firmware_features[i].supported)
6755                         continue;
6756                 pqi_request_firmware_feature(firmware_features,
6757                         pqi_firmware_features[i].feature_bit);
6758         }
6759
6760         rc = pqi_enable_firmware_features(ctrl_info, firmware_features,
6761                 firmware_features_iomem_addr);
6762         if (rc) {
6763                 dev_err(&ctrl_info->pci_dev->dev,
6764                         "failed to enable firmware features in PQI configuration table\n");
6765                 for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6766                         if (!pqi_firmware_features[i].supported)
6767                                 continue;
6768                         pqi_firmware_feature_update(ctrl_info,
6769                                 &pqi_firmware_features[i]);
6770                 }
6771                 return;
6772         }
6773
6774         ctrl_info->soft_reset_handshake_supported = false;
6775         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6776                 if (!pqi_firmware_features[i].supported)
6777                         continue;
6778                 if (pqi_is_firmware_feature_enabled(firmware_features,
6779                         firmware_features_iomem_addr,
6780                         pqi_firmware_features[i].feature_bit)) {
6781                         pqi_firmware_features[i].enabled = true;
6782                         if (pqi_firmware_features[i].feature_bit ==
6783                             PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE)
6784                                 ctrl_info->soft_reset_handshake_supported =
6785                                                                         true;
6786                 }
6787                 pqi_firmware_feature_update(ctrl_info,
6788                         &pqi_firmware_features[i]);
6789         }
6790 }
6791
6792 static void pqi_init_firmware_features(void)
6793 {
6794         unsigned int i;
6795
6796         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6797                 pqi_firmware_features[i].supported = false;
6798                 pqi_firmware_features[i].enabled = false;
6799         }
6800 }
6801
6802 static void pqi_process_firmware_features_section(
6803         struct pqi_config_table_section_info *section_info)
6804 {
6805         mutex_lock(&pqi_firmware_features_mutex);
6806         pqi_init_firmware_features();
6807         pqi_process_firmware_features(section_info);
6808         mutex_unlock(&pqi_firmware_features_mutex);
6809 }
6810
6811 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
6812 {
6813         u32 table_length;
6814         u32 section_offset;
6815         void __iomem *table_iomem_addr;
6816         struct pqi_config_table *config_table;
6817         struct pqi_config_table_section_header *section;
6818         struct pqi_config_table_section_info section_info;
6819
6820         table_length = ctrl_info->config_table_length;
6821         if (table_length == 0)
6822                 return 0;
6823
6824         config_table = kmalloc(table_length, GFP_KERNEL);
6825         if (!config_table) {
6826                 dev_err(&ctrl_info->pci_dev->dev,
6827                         "failed to allocate memory for PQI configuration table\n");
6828                 return -ENOMEM;
6829         }
6830
6831         /*
6832          * Copy the config table contents from I/O memory space into the
6833          * temporary buffer.
6834          */
6835         table_iomem_addr = ctrl_info->iomem_base +
6836                 ctrl_info->config_table_offset;
6837         memcpy_fromio(config_table, table_iomem_addr, table_length);
6838
6839         section_info.ctrl_info = ctrl_info;
6840         section_offset =
6841                 get_unaligned_le32(&config_table->first_section_offset);
6842
6843         while (section_offset) {
6844                 section = (void *)config_table + section_offset;
6845
6846                 section_info.section = section;
6847                 section_info.section_offset = section_offset;
6848                 section_info.section_iomem_addr =
6849                         table_iomem_addr + section_offset;
6850
6851                 switch (get_unaligned_le16(&section->section_id)) {
6852                 case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES:
6853                         pqi_process_firmware_features_section(&section_info);
6854                         break;
6855                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
6856                         if (pqi_disable_heartbeat)
6857                                 dev_warn(&ctrl_info->pci_dev->dev,
6858                                 "heartbeat disabled by module parameter\n");
6859                         else
6860                                 ctrl_info->heartbeat_counter =
6861                                         table_iomem_addr +
6862                                         section_offset +
6863                                         offsetof(
6864                                         struct pqi_config_table_heartbeat,
6865                                                 heartbeat_counter);
6866                         break;
6867                 case PQI_CONFIG_TABLE_SECTION_SOFT_RESET:
6868                         ctrl_info->soft_reset_status =
6869                                 table_iomem_addr +
6870                                 section_offset +
6871                                 offsetof(struct pqi_config_table_soft_reset,
6872                                                 soft_reset_status);
6873                         break;
6874                 }
6875
6876                 section_offset =
6877                         get_unaligned_le16(&section->next_section_offset);
6878         }
6879
6880         kfree(config_table);
6881
6882         return 0;
6883 }
6884
6885 /* Switches the controller from PQI mode back into SIS mode. */
6886
6887 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
6888 {
6889         int rc;
6890
6891         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
6892         rc = pqi_reset(ctrl_info);
6893         if (rc)
6894                 return rc;
6895         rc = sis_reenable_sis_mode(ctrl_info);
6896         if (rc) {
6897                 dev_err(&ctrl_info->pci_dev->dev,
6898                         "re-enabling SIS mode failed with error %d\n", rc);
6899                 return rc;
6900         }
6901         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6902
6903         return 0;
6904 }
6905
6906 /*
6907  * If the controller isn't already in SIS mode, this function forces it into
6908  * SIS mode.
6909  */
6910
6911 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
6912 {
6913         if (!sis_is_firmware_running(ctrl_info))
6914                 return -ENXIO;
6915
6916         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
6917                 return 0;
6918
6919         if (sis_is_kernel_up(ctrl_info)) {
6920                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6921                 return 0;
6922         }
6923
6924         return pqi_revert_to_sis_mode(ctrl_info);
6925 }
6926
6927 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
6928 {
6929         int rc;
6930
6931         rc = pqi_force_sis_mode(ctrl_info);
6932         if (rc)
6933                 return rc;
6934
6935         /*
6936          * Wait until the controller is ready to start accepting SIS
6937          * commands.
6938          */
6939         rc = sis_wait_for_ctrl_ready(ctrl_info);
6940         if (rc)
6941                 return rc;
6942
6943         /*
6944          * Get the controller properties.  This allows us to determine
6945          * whether or not it supports PQI mode.
6946          */
6947         rc = sis_get_ctrl_properties(ctrl_info);
6948         if (rc) {
6949                 dev_err(&ctrl_info->pci_dev->dev,
6950                         "error obtaining controller properties\n");
6951                 return rc;
6952         }
6953
6954         rc = sis_get_pqi_capabilities(ctrl_info);
6955         if (rc) {
6956                 dev_err(&ctrl_info->pci_dev->dev,
6957                         "error obtaining controller capabilities\n");
6958                 return rc;
6959         }
6960
6961         if (reset_devices) {
6962                 if (ctrl_info->max_outstanding_requests >
6963                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
6964                         ctrl_info->max_outstanding_requests =
6965                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
6966         } else {
6967                 if (ctrl_info->max_outstanding_requests >
6968                         PQI_MAX_OUTSTANDING_REQUESTS)
6969                         ctrl_info->max_outstanding_requests =
6970                                         PQI_MAX_OUTSTANDING_REQUESTS;
6971         }
6972
6973         pqi_calculate_io_resources(ctrl_info);
6974
6975         rc = pqi_alloc_error_buffer(ctrl_info);
6976         if (rc) {
6977                 dev_err(&ctrl_info->pci_dev->dev,
6978                         "failed to allocate PQI error buffer\n");
6979                 return rc;
6980         }
6981
6982         /*
6983          * If the function we are about to call succeeds, the
6984          * controller will transition from legacy SIS mode
6985          * into PQI mode.
6986          */
6987         rc = sis_init_base_struct_addr(ctrl_info);
6988         if (rc) {
6989                 dev_err(&ctrl_info->pci_dev->dev,
6990                         "error initializing PQI mode\n");
6991                 return rc;
6992         }
6993
6994         /* Wait for the controller to complete the SIS -> PQI transition. */
6995         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6996         if (rc) {
6997                 dev_err(&ctrl_info->pci_dev->dev,
6998                         "transition to PQI mode failed\n");
6999                 return rc;
7000         }
7001
7002         /* From here on, we are running in PQI mode. */
7003         ctrl_info->pqi_mode_enabled = true;
7004         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7005
7006         rc = pqi_alloc_admin_queues(ctrl_info);
7007         if (rc) {
7008                 dev_err(&ctrl_info->pci_dev->dev,
7009                         "failed to allocate admin queues\n");
7010                 return rc;
7011         }
7012
7013         rc = pqi_create_admin_queues(ctrl_info);
7014         if (rc) {
7015                 dev_err(&ctrl_info->pci_dev->dev,
7016                         "error creating admin queues\n");
7017                 return rc;
7018         }
7019
7020         rc = pqi_report_device_capability(ctrl_info);
7021         if (rc) {
7022                 dev_err(&ctrl_info->pci_dev->dev,
7023                         "obtaining device capability failed\n");
7024                 return rc;
7025         }
7026
7027         rc = pqi_validate_device_capability(ctrl_info);
7028         if (rc)
7029                 return rc;
7030
7031         pqi_calculate_queue_resources(ctrl_info);
7032
7033         rc = pqi_enable_msix_interrupts(ctrl_info);
7034         if (rc)
7035                 return rc;
7036
7037         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
7038                 ctrl_info->max_msix_vectors =
7039                         ctrl_info->num_msix_vectors_enabled;
7040                 pqi_calculate_queue_resources(ctrl_info);
7041         }
7042
7043         rc = pqi_alloc_io_resources(ctrl_info);
7044         if (rc)
7045                 return rc;
7046
7047         rc = pqi_alloc_operational_queues(ctrl_info);
7048         if (rc) {
7049                 dev_err(&ctrl_info->pci_dev->dev,
7050                         "failed to allocate operational queues\n");
7051                 return rc;
7052         }
7053
7054         pqi_init_operational_queues(ctrl_info);
7055
7056         rc = pqi_request_irqs(ctrl_info);
7057         if (rc)
7058                 return rc;
7059
7060         rc = pqi_create_queues(ctrl_info);
7061         if (rc)
7062                 return rc;
7063
7064         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
7065
7066         ctrl_info->controller_online = true;
7067
7068         rc = pqi_process_config_table(ctrl_info);
7069         if (rc)
7070                 return rc;
7071
7072         pqi_start_heartbeat_timer(ctrl_info);
7073
7074         rc = pqi_enable_events(ctrl_info);
7075         if (rc) {
7076                 dev_err(&ctrl_info->pci_dev->dev,
7077                         "error enabling events\n");
7078                 return rc;
7079         }
7080
7081         /* Register with the SCSI subsystem. */
7082         rc = pqi_register_scsi(ctrl_info);
7083         if (rc)
7084                 return rc;
7085
7086         rc = pqi_get_ctrl_firmware_version(ctrl_info);
7087         if (rc) {
7088                 dev_err(&ctrl_info->pci_dev->dev,
7089                         "error obtaining firmware version\n");
7090                 return rc;
7091         }
7092
7093         rc = pqi_set_diag_rescan(ctrl_info);
7094         if (rc) {
7095                 dev_err(&ctrl_info->pci_dev->dev,
7096                         "error enabling multi-lun rescan\n");
7097                 return rc;
7098         }
7099
7100         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
7101         if (rc) {
7102                 dev_err(&ctrl_info->pci_dev->dev,
7103                         "error updating host wellness\n");
7104                 return rc;
7105         }
7106
7107         pqi_schedule_update_time_worker(ctrl_info);
7108
7109         pqi_scan_scsi_devices(ctrl_info);
7110
7111         return 0;
7112 }
7113
7114 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
7115 {
7116         unsigned int i;
7117         struct pqi_admin_queues *admin_queues;
7118         struct pqi_event_queue *event_queue;
7119
7120         admin_queues = &ctrl_info->admin_queues;
7121         admin_queues->iq_pi_copy = 0;
7122         admin_queues->oq_ci_copy = 0;
7123         writel(0, admin_queues->oq_pi);
7124
7125         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
7126                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
7127                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
7128                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
7129
7130                 writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]);
7131                 writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]);
7132                 writel(0, ctrl_info->queue_groups[i].oq_pi);
7133         }
7134
7135         event_queue = &ctrl_info->event_queue;
7136         writel(0, event_queue->oq_pi);
7137         event_queue->oq_ci_copy = 0;
7138 }
7139
7140 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
7141 {
7142         int rc;
7143
7144         rc = pqi_force_sis_mode(ctrl_info);
7145         if (rc)
7146                 return rc;
7147
7148         /*
7149          * Wait until the controller is ready to start accepting SIS
7150          * commands.
7151          */
7152         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
7153         if (rc)
7154                 return rc;
7155
7156         /*
7157          * Get the controller properties.  This allows us to determine
7158          * whether or not it supports PQI mode.
7159          */
7160         rc = sis_get_ctrl_properties(ctrl_info);
7161         if (rc) {
7162                 dev_err(&ctrl_info->pci_dev->dev,
7163                         "error obtaining controller properties\n");
7164                 return rc;
7165         }
7166
7167         rc = sis_get_pqi_capabilities(ctrl_info);
7168         if (rc) {
7169                 dev_err(&ctrl_info->pci_dev->dev,
7170                         "error obtaining controller capabilities\n");
7171                 return rc;
7172         }
7173
7174         /*
7175          * If the function we are about to call succeeds, the
7176          * controller will transition from legacy SIS mode
7177          * into PQI mode.
7178          */
7179         rc = sis_init_base_struct_addr(ctrl_info);
7180         if (rc) {
7181                 dev_err(&ctrl_info->pci_dev->dev,
7182                         "error initializing PQI mode\n");
7183                 return rc;
7184         }
7185
7186         /* Wait for the controller to complete the SIS -> PQI transition. */
7187         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
7188         if (rc) {
7189                 dev_err(&ctrl_info->pci_dev->dev,
7190                         "transition to PQI mode failed\n");
7191                 return rc;
7192         }
7193
7194         /* From here on, we are running in PQI mode. */
7195         ctrl_info->pqi_mode_enabled = true;
7196         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7197
7198         pqi_reinit_queues(ctrl_info);
7199
7200         rc = pqi_create_admin_queues(ctrl_info);
7201         if (rc) {
7202                 dev_err(&ctrl_info->pci_dev->dev,
7203                         "error creating admin queues\n");
7204                 return rc;
7205         }
7206
7207         rc = pqi_create_queues(ctrl_info);
7208         if (rc)
7209                 return rc;
7210
7211         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
7212
7213         ctrl_info->controller_online = true;
7214         pqi_ctrl_unblock_requests(ctrl_info);
7215
7216         rc = pqi_process_config_table(ctrl_info);
7217         if (rc)
7218                 return rc;
7219
7220         pqi_start_heartbeat_timer(ctrl_info);
7221
7222         rc = pqi_enable_events(ctrl_info);
7223         if (rc) {
7224                 dev_err(&ctrl_info->pci_dev->dev,
7225                         "error enabling events\n");
7226                 return rc;
7227         }
7228
7229         rc = pqi_get_ctrl_firmware_version(ctrl_info);
7230         if (rc) {
7231                 dev_err(&ctrl_info->pci_dev->dev,
7232                         "error obtaining firmware version\n");
7233                 return rc;
7234         }
7235
7236         rc = pqi_set_diag_rescan(ctrl_info);
7237         if (rc) {
7238                 dev_err(&ctrl_info->pci_dev->dev,
7239                         "error enabling multi-lun rescan\n");
7240                 return rc;
7241         }
7242
7243         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
7244         if (rc) {
7245                 dev_err(&ctrl_info->pci_dev->dev,
7246                         "error updating host wellness\n");
7247                 return rc;
7248         }
7249
7250         pqi_schedule_update_time_worker(ctrl_info);
7251
7252         pqi_scan_scsi_devices(ctrl_info);
7253
7254         return 0;
7255 }
7256
7257 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev,
7258         u16 timeout)
7259 {
7260         return pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
7261                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
7262 }
7263
7264 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
7265 {
7266         int rc;
7267         u64 mask;
7268
7269         rc = pci_enable_device(ctrl_info->pci_dev);
7270         if (rc) {
7271                 dev_err(&ctrl_info->pci_dev->dev,
7272                         "failed to enable PCI device\n");
7273                 return rc;
7274         }
7275
7276         if (sizeof(dma_addr_t) > 4)
7277                 mask = DMA_BIT_MASK(64);
7278         else
7279                 mask = DMA_BIT_MASK(32);
7280
7281         rc = dma_set_mask(&ctrl_info->pci_dev->dev, mask);
7282         if (rc) {
7283                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
7284                 goto disable_device;
7285         }
7286
7287         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
7288         if (rc) {
7289                 dev_err(&ctrl_info->pci_dev->dev,
7290                         "failed to obtain PCI resources\n");
7291                 goto disable_device;
7292         }
7293
7294         ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
7295                 ctrl_info->pci_dev, 0),
7296                 sizeof(struct pqi_ctrl_registers));
7297         if (!ctrl_info->iomem_base) {
7298                 dev_err(&ctrl_info->pci_dev->dev,
7299                         "failed to map memory for controller registers\n");
7300                 rc = -ENOMEM;
7301                 goto release_regions;
7302         }
7303
7304 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
7305
7306         /* Increase the PCIe completion timeout. */
7307         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
7308                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
7309         if (rc) {
7310                 dev_err(&ctrl_info->pci_dev->dev,
7311                         "failed to set PCIe completion timeout\n");
7312                 goto release_regions;
7313         }
7314
7315         /* Enable bus mastering. */
7316         pci_set_master(ctrl_info->pci_dev);
7317
7318         ctrl_info->registers = ctrl_info->iomem_base;
7319         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
7320
7321         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
7322
7323         return 0;
7324
7325 release_regions:
7326         pci_release_regions(ctrl_info->pci_dev);
7327 disable_device:
7328         pci_disable_device(ctrl_info->pci_dev);
7329
7330         return rc;
7331 }
7332
7333 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
7334 {
7335         iounmap(ctrl_info->iomem_base);
7336         pci_release_regions(ctrl_info->pci_dev);
7337         if (pci_is_enabled(ctrl_info->pci_dev))
7338                 pci_disable_device(ctrl_info->pci_dev);
7339         pci_set_drvdata(ctrl_info->pci_dev, NULL);
7340 }
7341
7342 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
7343 {
7344         struct pqi_ctrl_info *ctrl_info;
7345
7346         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
7347                         GFP_KERNEL, numa_node);
7348         if (!ctrl_info)
7349                 return NULL;
7350
7351         mutex_init(&ctrl_info->scan_mutex);
7352         mutex_init(&ctrl_info->lun_reset_mutex);
7353         mutex_init(&ctrl_info->ofa_mutex);
7354
7355         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
7356         spin_lock_init(&ctrl_info->scsi_device_list_lock);
7357
7358         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
7359         atomic_set(&ctrl_info->num_interrupts, 0);
7360
7361         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
7362         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
7363
7364         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
7365         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
7366
7367         sema_init(&ctrl_info->sync_request_sem,
7368                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
7369         init_waitqueue_head(&ctrl_info->block_requests_wait);
7370
7371         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
7372         spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock);
7373         INIT_WORK(&ctrl_info->raid_bypass_retry_work,
7374                 pqi_raid_bypass_retry_worker);
7375
7376         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
7377         ctrl_info->irq_mode = IRQ_MODE_NONE;
7378         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
7379
7380         return ctrl_info;
7381 }
7382
7383 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
7384 {
7385         kfree(ctrl_info);
7386 }
7387
7388 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
7389 {
7390         pqi_free_irqs(ctrl_info);
7391         pqi_disable_msix_interrupts(ctrl_info);
7392 }
7393
7394 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
7395 {
7396         pqi_stop_heartbeat_timer(ctrl_info);
7397         pqi_free_interrupts(ctrl_info);
7398         if (ctrl_info->queue_memory_base)
7399                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7400                         ctrl_info->queue_memory_length,
7401                         ctrl_info->queue_memory_base,
7402                         ctrl_info->queue_memory_base_dma_handle);
7403         if (ctrl_info->admin_queue_memory_base)
7404                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7405                         ctrl_info->admin_queue_memory_length,
7406                         ctrl_info->admin_queue_memory_base,
7407                         ctrl_info->admin_queue_memory_base_dma_handle);
7408         pqi_free_all_io_requests(ctrl_info);
7409         if (ctrl_info->error_buffer)
7410                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7411                         ctrl_info->error_buffer_length,
7412                         ctrl_info->error_buffer,
7413                         ctrl_info->error_buffer_dma_handle);
7414         if (ctrl_info->iomem_base)
7415                 pqi_cleanup_pci_init(ctrl_info);
7416         pqi_free_ctrl_info(ctrl_info);
7417 }
7418
7419 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
7420 {
7421         pqi_cancel_rescan_worker(ctrl_info);
7422         pqi_cancel_update_time_worker(ctrl_info);
7423         pqi_remove_all_scsi_devices(ctrl_info);
7424         pqi_unregister_scsi(ctrl_info);
7425         if (ctrl_info->pqi_mode_enabled)
7426                 pqi_revert_to_sis_mode(ctrl_info);
7427         pqi_free_ctrl_resources(ctrl_info);
7428 }
7429
7430 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info)
7431 {
7432         pqi_cancel_update_time_worker(ctrl_info);
7433         pqi_cancel_rescan_worker(ctrl_info);
7434         pqi_wait_until_lun_reset_finished(ctrl_info);
7435         pqi_wait_until_scan_finished(ctrl_info);
7436         pqi_ctrl_ofa_start(ctrl_info);
7437         pqi_ctrl_block_requests(ctrl_info);
7438         pqi_ctrl_wait_until_quiesced(ctrl_info);
7439         pqi_ctrl_wait_for_pending_io(ctrl_info, PQI_PENDING_IO_TIMEOUT_SECS);
7440         pqi_fail_io_queued_for_all_devices(ctrl_info);
7441         pqi_wait_until_inbound_queues_empty(ctrl_info);
7442         pqi_stop_heartbeat_timer(ctrl_info);
7443         ctrl_info->pqi_mode_enabled = false;
7444         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7445 }
7446
7447 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info)
7448 {
7449         pqi_ofa_free_host_buffer(ctrl_info);
7450         ctrl_info->pqi_mode_enabled = true;
7451         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7452         ctrl_info->controller_online = true;
7453         pqi_ctrl_unblock_requests(ctrl_info);
7454         pqi_start_heartbeat_timer(ctrl_info);
7455         pqi_schedule_update_time_worker(ctrl_info);
7456         pqi_clear_soft_reset_status(ctrl_info,
7457                 PQI_SOFT_RESET_ABORT);
7458         pqi_scan_scsi_devices(ctrl_info);
7459 }
7460
7461 static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info,
7462         u32 total_size, u32 chunk_size)
7463 {
7464         u32 sg_count;
7465         u32 size;
7466         int i;
7467         struct pqi_sg_descriptor *mem_descriptor = NULL;
7468         struct device *dev;
7469         struct pqi_ofa_memory *ofap;
7470
7471         dev = &ctrl_info->pci_dev->dev;
7472
7473         sg_count = (total_size + chunk_size - 1);
7474         sg_count /= chunk_size;
7475
7476         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7477
7478         if (sg_count*chunk_size < total_size)
7479                 goto out;
7480
7481         ctrl_info->pqi_ofa_chunk_virt_addr =
7482                                 kcalloc(sg_count, sizeof(void *), GFP_KERNEL);
7483         if (!ctrl_info->pqi_ofa_chunk_virt_addr)
7484                 goto out;
7485
7486         for (size = 0, i = 0; size < total_size; size += chunk_size, i++) {
7487                 dma_addr_t dma_handle;
7488
7489                 ctrl_info->pqi_ofa_chunk_virt_addr[i] =
7490                         dma_alloc_coherent(dev, chunk_size, &dma_handle,
7491                                            GFP_KERNEL);
7492
7493                 if (!ctrl_info->pqi_ofa_chunk_virt_addr[i])
7494                         break;
7495
7496                 mem_descriptor = &ofap->sg_descriptor[i];
7497                 put_unaligned_le64 ((u64) dma_handle, &mem_descriptor->address);
7498                 put_unaligned_le32 (chunk_size, &mem_descriptor->length);
7499         }
7500
7501         if (!size || size < total_size)
7502                 goto out_free_chunks;
7503
7504         put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags);
7505         put_unaligned_le16(sg_count, &ofap->num_memory_descriptors);
7506         put_unaligned_le32(size, &ofap->bytes_allocated);
7507
7508         return 0;
7509
7510 out_free_chunks:
7511         while (--i >= 0) {
7512                 mem_descriptor = &ofap->sg_descriptor[i];
7513                 dma_free_coherent(dev, chunk_size,
7514                                 ctrl_info->pqi_ofa_chunk_virt_addr[i],
7515                                 get_unaligned_le64(&mem_descriptor->address));
7516         }
7517         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
7518
7519 out:
7520         put_unaligned_le32 (0, &ofap->bytes_allocated);
7521         return -ENOMEM;
7522 }
7523
7524 static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info)
7525 {
7526         u32 total_size;
7527         u32 min_chunk_size;
7528         u32 chunk_sz;
7529
7530         total_size = le32_to_cpu(
7531                         ctrl_info->pqi_ofa_mem_virt_addr->bytes_allocated);
7532         min_chunk_size = total_size / PQI_OFA_MAX_SG_DESCRIPTORS;
7533
7534         for (chunk_sz = total_size; chunk_sz >= min_chunk_size; chunk_sz /= 2)
7535                 if (!pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_sz))
7536                         return 0;
7537
7538         return -ENOMEM;
7539 }
7540
7541 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info,
7542         u32 bytes_requested)
7543 {
7544         struct pqi_ofa_memory *pqi_ofa_memory;
7545         struct device *dev;
7546
7547         dev = &ctrl_info->pci_dev->dev;
7548         pqi_ofa_memory = dma_alloc_coherent(dev,
7549                                             PQI_OFA_MEMORY_DESCRIPTOR_LENGTH,
7550                                             &ctrl_info->pqi_ofa_mem_dma_handle,
7551                                             GFP_KERNEL);
7552
7553         if (!pqi_ofa_memory)
7554                 return;
7555
7556         put_unaligned_le16(PQI_OFA_VERSION, &pqi_ofa_memory->version);
7557         memcpy(&pqi_ofa_memory->signature, PQI_OFA_SIGNATURE,
7558                                         sizeof(pqi_ofa_memory->signature));
7559         pqi_ofa_memory->bytes_allocated = cpu_to_le32(bytes_requested);
7560
7561         ctrl_info->pqi_ofa_mem_virt_addr = pqi_ofa_memory;
7562
7563         if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) {
7564                 dev_err(dev, "Failed to allocate host buffer of size = %u",
7565                         bytes_requested);
7566         }
7567 }
7568
7569 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info)
7570 {
7571         int i;
7572         struct pqi_sg_descriptor *mem_descriptor;
7573         struct pqi_ofa_memory *ofap;
7574
7575         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7576
7577         if (!ofap)
7578                 return;
7579
7580         if (!ofap->bytes_allocated)
7581                 goto out;
7582
7583         mem_descriptor = ofap->sg_descriptor;
7584
7585         for (i = 0; i < get_unaligned_le16(&ofap->num_memory_descriptors);
7586                 i++) {
7587                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7588                         get_unaligned_le32(&mem_descriptor[i].length),
7589                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
7590                         get_unaligned_le64(&mem_descriptor[i].address));
7591         }
7592         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
7593
7594 out:
7595         dma_free_coherent(&ctrl_info->pci_dev->dev,
7596                         PQI_OFA_MEMORY_DESCRIPTOR_LENGTH, ofap,
7597                         ctrl_info->pqi_ofa_mem_dma_handle);
7598         ctrl_info->pqi_ofa_mem_virt_addr = NULL;
7599 }
7600
7601 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info)
7602 {
7603         struct pqi_vendor_general_request request;
7604         size_t size;
7605         struct pqi_ofa_memory *ofap;
7606
7607         memset(&request, 0, sizeof(request));
7608
7609         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7610
7611         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
7612         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
7613                 &request.header.iu_length);
7614         put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE,
7615                 &request.function_code);
7616
7617         if (ofap) {
7618                 size = offsetof(struct pqi_ofa_memory, sg_descriptor) +
7619                         get_unaligned_le16(&ofap->num_memory_descriptors) *
7620                         sizeof(struct pqi_sg_descriptor);
7621
7622                 put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle,
7623                         &request.data.ofa_memory_allocation.buffer_address);
7624                 put_unaligned_le32(size,
7625                         &request.data.ofa_memory_allocation.buffer_length);
7626
7627         }
7628
7629         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
7630                 0, NULL, NO_TIMEOUT);
7631 }
7632
7633 #define PQI_POST_RESET_DELAY_B4_MSGU_READY      5000
7634
7635 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info)
7636 {
7637         msleep(PQI_POST_RESET_DELAY_B4_MSGU_READY);
7638         return pqi_ctrl_init_resume(ctrl_info);
7639 }
7640
7641 static void pqi_perform_lockup_action(void)
7642 {
7643         switch (pqi_lockup_action) {
7644         case PANIC:
7645                 panic("FATAL: Smart Family Controller lockup detected");
7646                 break;
7647         case REBOOT:
7648                 emergency_restart();
7649                 break;
7650         case NONE:
7651         default:
7652                 break;
7653         }
7654 }
7655
7656 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
7657         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
7658         .status = SAM_STAT_CHECK_CONDITION,
7659 };
7660
7661 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
7662 {
7663         unsigned int i;
7664         struct pqi_io_request *io_request;
7665         struct scsi_cmnd *scmd;
7666
7667         for (i = 0; i < ctrl_info->max_io_slots; i++) {
7668                 io_request = &ctrl_info->io_request_pool[i];
7669                 if (atomic_read(&io_request->refcount) == 0)
7670                         continue;
7671
7672                 scmd = io_request->scmd;
7673                 if (scmd) {
7674                         set_host_byte(scmd, DID_NO_CONNECT);
7675                 } else {
7676                         io_request->status = -ENXIO;
7677                         io_request->error_info =
7678                                 &pqi_ctrl_offline_raid_error_info;
7679                 }
7680
7681                 io_request->io_complete_callback(io_request,
7682                         io_request->context);
7683         }
7684 }
7685
7686 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
7687 {
7688         pqi_perform_lockup_action();
7689         pqi_stop_heartbeat_timer(ctrl_info);
7690         pqi_free_interrupts(ctrl_info);
7691         pqi_cancel_rescan_worker(ctrl_info);
7692         pqi_cancel_update_time_worker(ctrl_info);
7693         pqi_ctrl_wait_until_quiesced(ctrl_info);
7694         pqi_fail_all_outstanding_requests(ctrl_info);
7695         pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
7696         pqi_ctrl_unblock_requests(ctrl_info);
7697 }
7698
7699 static void pqi_ctrl_offline_worker(struct work_struct *work)
7700 {
7701         struct pqi_ctrl_info *ctrl_info;
7702
7703         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
7704         pqi_take_ctrl_offline_deferred(ctrl_info);
7705 }
7706
7707 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
7708 {
7709         if (!ctrl_info->controller_online)
7710                 return;
7711
7712         ctrl_info->controller_online = false;
7713         ctrl_info->pqi_mode_enabled = false;
7714         pqi_ctrl_block_requests(ctrl_info);
7715         if (!pqi_disable_ctrl_shutdown)
7716                 sis_shutdown_ctrl(ctrl_info);
7717         pci_disable_device(ctrl_info->pci_dev);
7718         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
7719         schedule_work(&ctrl_info->ctrl_offline_work);
7720 }
7721
7722 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
7723         const struct pci_device_id *id)
7724 {
7725         char *ctrl_description;
7726
7727         if (id->driver_data)
7728                 ctrl_description = (char *)id->driver_data;
7729         else
7730                 ctrl_description = "Microsemi Smart Family Controller";
7731
7732         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
7733 }
7734
7735 static int pqi_pci_probe(struct pci_dev *pci_dev,
7736         const struct pci_device_id *id)
7737 {
7738         int rc;
7739         int node, cp_node;
7740         struct pqi_ctrl_info *ctrl_info;
7741
7742         pqi_print_ctrl_info(pci_dev, id);
7743
7744         if (pqi_disable_device_id_wildcards &&
7745                 id->subvendor == PCI_ANY_ID &&
7746                 id->subdevice == PCI_ANY_ID) {
7747                 dev_warn(&pci_dev->dev,
7748                         "controller not probed because device ID wildcards are disabled\n");
7749                 return -ENODEV;
7750         }
7751
7752         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
7753                 dev_warn(&pci_dev->dev,
7754                         "controller device ID matched using wildcards\n");
7755
7756         node = dev_to_node(&pci_dev->dev);
7757         if (node == NUMA_NO_NODE) {
7758                 cp_node = cpu_to_node(0);
7759                 if (cp_node == NUMA_NO_NODE)
7760                         cp_node = 0;
7761                 set_dev_node(&pci_dev->dev, cp_node);
7762         }
7763
7764         ctrl_info = pqi_alloc_ctrl_info(node);
7765         if (!ctrl_info) {
7766                 dev_err(&pci_dev->dev,
7767                         "failed to allocate controller info block\n");
7768                 return -ENOMEM;
7769         }
7770
7771         ctrl_info->pci_dev = pci_dev;
7772
7773         rc = pqi_pci_init(ctrl_info);
7774         if (rc)
7775                 goto error;
7776
7777         rc = pqi_ctrl_init(ctrl_info);
7778         if (rc)
7779                 goto error;
7780
7781         return 0;
7782
7783 error:
7784         pqi_remove_ctrl(ctrl_info);
7785
7786         return rc;
7787 }
7788
7789 static void pqi_pci_remove(struct pci_dev *pci_dev)
7790 {
7791         struct pqi_ctrl_info *ctrl_info;
7792
7793         ctrl_info = pci_get_drvdata(pci_dev);
7794         if (!ctrl_info)
7795                 return;
7796
7797         ctrl_info->in_shutdown = true;
7798
7799         pqi_remove_ctrl(ctrl_info);
7800 }
7801
7802 static void pqi_shutdown(struct pci_dev *pci_dev)
7803 {
7804         int rc;
7805         struct pqi_ctrl_info *ctrl_info;
7806
7807         ctrl_info = pci_get_drvdata(pci_dev);
7808         if (!ctrl_info)
7809                 goto error;
7810
7811         /*
7812          * Write all data in the controller's battery-backed cache to
7813          * storage.
7814          */
7815         rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
7816         pqi_free_interrupts(ctrl_info);
7817         pqi_reset(ctrl_info);
7818         if (rc == 0)
7819                 return;
7820
7821 error:
7822         dev_warn(&pci_dev->dev,
7823                 "unable to flush controller cache\n");
7824 }
7825
7826 static void pqi_process_lockup_action_param(void)
7827 {
7828         unsigned int i;
7829
7830         if (!pqi_lockup_action_param)
7831                 return;
7832
7833         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
7834                 if (strcmp(pqi_lockup_action_param,
7835                         pqi_lockup_actions[i].name) == 0) {
7836                         pqi_lockup_action = pqi_lockup_actions[i].action;
7837                         return;
7838                 }
7839         }
7840
7841         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
7842                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
7843 }
7844
7845 static void pqi_process_module_params(void)
7846 {
7847         pqi_process_lockup_action_param();
7848 }
7849
7850 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
7851 {
7852         struct pqi_ctrl_info *ctrl_info;
7853
7854         ctrl_info = pci_get_drvdata(pci_dev);
7855
7856         pqi_disable_events(ctrl_info);
7857         pqi_cancel_update_time_worker(ctrl_info);
7858         pqi_cancel_rescan_worker(ctrl_info);
7859         pqi_wait_until_scan_finished(ctrl_info);
7860         pqi_wait_until_lun_reset_finished(ctrl_info);
7861         pqi_wait_until_ofa_finished(ctrl_info);
7862         pqi_flush_cache(ctrl_info, SUSPEND);
7863         pqi_ctrl_block_requests(ctrl_info);
7864         pqi_ctrl_wait_until_quiesced(ctrl_info);
7865         pqi_wait_until_inbound_queues_empty(ctrl_info);
7866         pqi_ctrl_wait_for_pending_io(ctrl_info, NO_TIMEOUT);
7867         pqi_stop_heartbeat_timer(ctrl_info);
7868
7869         if (state.event == PM_EVENT_FREEZE)
7870                 return 0;
7871
7872         pci_save_state(pci_dev);
7873         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
7874
7875         ctrl_info->controller_online = false;
7876         ctrl_info->pqi_mode_enabled = false;
7877
7878         return 0;
7879 }
7880
7881 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
7882 {
7883         int rc;
7884         struct pqi_ctrl_info *ctrl_info;
7885
7886         ctrl_info = pci_get_drvdata(pci_dev);
7887
7888         if (pci_dev->current_state != PCI_D0) {
7889                 ctrl_info->max_hw_queue_index = 0;
7890                 pqi_free_interrupts(ctrl_info);
7891                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
7892                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
7893                         IRQF_SHARED, DRIVER_NAME_SHORT,
7894                         &ctrl_info->queue_groups[0]);
7895                 if (rc) {
7896                         dev_err(&ctrl_info->pci_dev->dev,
7897                                 "irq %u init failed with error %d\n",
7898                                 pci_dev->irq, rc);
7899                         return rc;
7900                 }
7901                 pqi_start_heartbeat_timer(ctrl_info);
7902                 pqi_ctrl_unblock_requests(ctrl_info);
7903                 return 0;
7904         }
7905
7906         pci_set_power_state(pci_dev, PCI_D0);
7907         pci_restore_state(pci_dev);
7908
7909         return pqi_ctrl_init_resume(ctrl_info);
7910 }
7911
7912 /* Define the PCI IDs for the controllers that we support. */
7913 static const struct pci_device_id pqi_pci_id_table[] = {
7914         {
7915                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7916                                0x105b, 0x1211)
7917         },
7918         {
7919                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7920                                0x105b, 0x1321)
7921         },
7922         {
7923                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7924                                0x152d, 0x8a22)
7925         },
7926         {
7927                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7928                                0x152d, 0x8a23)
7929         },
7930         {
7931                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7932                                0x152d, 0x8a24)
7933         },
7934         {
7935                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7936                                0x152d, 0x8a36)
7937         },
7938         {
7939                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7940                                0x152d, 0x8a37)
7941         },
7942         {
7943                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7944                                0x193d, 0x8460)
7945         },
7946         {
7947                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7948                                0x193d, 0x8461)
7949         },
7950         {
7951                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7952                                0x193d, 0xc460)
7953         },
7954         {
7955                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7956                                0x193d, 0xc461)
7957         },
7958         {
7959                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7960                                0x193d, 0xf460)
7961         },
7962         {
7963                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7964                                0x193d, 0xf461)
7965         },
7966         {
7967                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7968                                0x1bd4, 0x0045)
7969         },
7970         {
7971                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7972                                0x1bd4, 0x0046)
7973         },
7974         {
7975                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7976                                0x1bd4, 0x0047)
7977         },
7978         {
7979                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7980                                0x1bd4, 0x0048)
7981         },
7982         {
7983                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7984                                0x1bd4, 0x004a)
7985         },
7986         {
7987                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7988                                0x1bd4, 0x004b)
7989         },
7990         {
7991                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7992                                0x1bd4, 0x004c)
7993         },
7994         {
7995                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7996                                0x19e5, 0xd227)
7997         },
7998         {
7999                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8000                                0x19e5, 0xd228)
8001         },
8002         {
8003                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8004                                0x19e5, 0xd229)
8005         },
8006         {
8007                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8008                                0x19e5, 0xd22a)
8009         },
8010         {
8011                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8012                                0x19e5, 0xd22b)
8013         },
8014         {
8015                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8016                                0x19e5, 0xd22c)
8017         },
8018         {
8019                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8020                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
8021         },
8022         {
8023                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8024                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
8025         },
8026         {
8027                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8028                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
8029         },
8030         {
8031                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8032                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
8033         },
8034         {
8035                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8036                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
8037         },
8038         {
8039                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8040                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
8041         },
8042         {
8043                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8044                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
8045         },
8046         {
8047                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8048                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
8049         },
8050         {
8051                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8052                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
8053         },
8054         {
8055                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8056                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
8057         },
8058         {
8059                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8060                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
8061         },
8062         {
8063                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8064                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
8065         },
8066         {
8067                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8068                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
8069         },
8070         {
8071                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8072                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
8073         },
8074         {
8075                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8076                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
8077         },
8078         {
8079                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8080                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
8081         },
8082         {
8083                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8084                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
8085         },
8086         {
8087                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8088                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
8089         },
8090         {
8091                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8092                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
8093         },
8094         {
8095                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8096                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
8097         },
8098         {
8099                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8100                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
8101         },
8102         {
8103                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8104                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
8105         },
8106         {
8107                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8108                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
8109         },
8110         {
8111                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8112                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
8113         },
8114         {
8115                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8116                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
8117         },
8118         {
8119                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8120                                PCI_VENDOR_ID_ADAPTEC2, 0x1282)
8121         },
8122         {
8123                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8124                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
8125         },
8126         {
8127                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8128                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
8129         },
8130         {
8131                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8132                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
8133         },
8134         {
8135                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8136                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
8137         },
8138         {
8139                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8140                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
8141         },
8142         {
8143                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8144                                PCI_VENDOR_ID_ADVANTECH, 0x8312)
8145         },
8146         {
8147                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8148                                PCI_VENDOR_ID_DELL, 0x1fe0)
8149         },
8150         {
8151                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8152                                PCI_VENDOR_ID_HP, 0x0600)
8153         },
8154         {
8155                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8156                                PCI_VENDOR_ID_HP, 0x0601)
8157         },
8158         {
8159                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8160                                PCI_VENDOR_ID_HP, 0x0602)
8161         },
8162         {
8163                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8164                                PCI_VENDOR_ID_HP, 0x0603)
8165         },
8166         {
8167                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8168                                PCI_VENDOR_ID_HP, 0x0609)
8169         },
8170         {
8171                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8172                                PCI_VENDOR_ID_HP, 0x0650)
8173         },
8174         {
8175                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8176                                PCI_VENDOR_ID_HP, 0x0651)
8177         },
8178         {
8179                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8180                                PCI_VENDOR_ID_HP, 0x0652)
8181         },
8182         {
8183                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8184                                PCI_VENDOR_ID_HP, 0x0653)
8185         },
8186         {
8187                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8188                                PCI_VENDOR_ID_HP, 0x0654)
8189         },
8190         {
8191                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8192                                PCI_VENDOR_ID_HP, 0x0655)
8193         },
8194         {
8195                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8196                                PCI_VENDOR_ID_HP, 0x0700)
8197         },
8198         {
8199                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8200                                PCI_VENDOR_ID_HP, 0x0701)
8201         },
8202         {
8203                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8204                                PCI_VENDOR_ID_HP, 0x1001)
8205         },
8206         {
8207                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8208                                PCI_VENDOR_ID_HP, 0x1100)
8209         },
8210         {
8211                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8212                                PCI_VENDOR_ID_HP, 0x1101)
8213         },
8214         {
8215                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8216                                PCI_ANY_ID, PCI_ANY_ID)
8217         },
8218         { 0 }
8219 };
8220
8221 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
8222
8223 static struct pci_driver pqi_pci_driver = {
8224         .name = DRIVER_NAME_SHORT,
8225         .id_table = pqi_pci_id_table,
8226         .probe = pqi_pci_probe,
8227         .remove = pqi_pci_remove,
8228         .shutdown = pqi_shutdown,
8229 #if defined(CONFIG_PM)
8230         .suspend = pqi_suspend,
8231         .resume = pqi_resume,
8232 #endif
8233 };
8234
8235 static int __init pqi_init(void)
8236 {
8237         int rc;
8238
8239         pr_info(DRIVER_NAME "\n");
8240
8241         pqi_sas_transport_template =
8242                 sas_attach_transport(&pqi_sas_transport_functions);
8243         if (!pqi_sas_transport_template)
8244                 return -ENODEV;
8245
8246         pqi_process_module_params();
8247
8248         rc = pci_register_driver(&pqi_pci_driver);
8249         if (rc)
8250                 sas_release_transport(pqi_sas_transport_template);
8251
8252         return rc;
8253 }
8254
8255 static void __exit pqi_cleanup(void)
8256 {
8257         pci_unregister_driver(&pqi_pci_driver);
8258         sas_release_transport(pqi_sas_transport_template);
8259 }
8260
8261 module_init(pqi_init);
8262 module_exit(pqi_cleanup);
8263
8264 static void __attribute__((unused)) verify_structures(void)
8265 {
8266         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8267                 sis_host_to_ctrl_doorbell) != 0x20);
8268         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8269                 sis_interrupt_mask) != 0x34);
8270         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8271                 sis_ctrl_to_host_doorbell) != 0x9c);
8272         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8273                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
8274         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8275                 sis_driver_scratch) != 0xb0);
8276         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8277                 sis_firmware_status) != 0xbc);
8278         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8279                 sis_mailbox) != 0x1000);
8280         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8281                 pqi_registers) != 0x4000);
8282
8283         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8284                 iu_type) != 0x0);
8285         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8286                 iu_length) != 0x2);
8287         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8288                 response_queue_id) != 0x4);
8289         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8290                 work_area) != 0x6);
8291         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
8292
8293         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8294                 status) != 0x0);
8295         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8296                 service_response) != 0x1);
8297         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8298                 data_present) != 0x2);
8299         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8300                 reserved) != 0x3);
8301         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8302                 residual_count) != 0x4);
8303         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8304                 data_length) != 0x8);
8305         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8306                 reserved1) != 0xa);
8307         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8308                 data) != 0xc);
8309         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
8310
8311         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8312                 data_in_result) != 0x0);
8313         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8314                 data_out_result) != 0x1);
8315         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8316                 reserved) != 0x2);
8317         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8318                 status) != 0x5);
8319         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8320                 status_qualifier) != 0x6);
8321         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8322                 sense_data_length) != 0x8);
8323         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8324                 response_data_length) != 0xa);
8325         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8326                 data_in_transferred) != 0xc);
8327         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8328                 data_out_transferred) != 0x10);
8329         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8330                 data) != 0x14);
8331         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
8332
8333         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8334                 signature) != 0x0);
8335         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8336                 function_and_status_code) != 0x8);
8337         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8338                 max_admin_iq_elements) != 0x10);
8339         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8340                 max_admin_oq_elements) != 0x11);
8341         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8342                 admin_iq_element_length) != 0x12);
8343         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8344                 admin_oq_element_length) != 0x13);
8345         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8346                 max_reset_timeout) != 0x14);
8347         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8348                 legacy_intx_status) != 0x18);
8349         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8350                 legacy_intx_mask_set) != 0x1c);
8351         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8352                 legacy_intx_mask_clear) != 0x20);
8353         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8354                 device_status) != 0x40);
8355         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8356                 admin_iq_pi_offset) != 0x48);
8357         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8358                 admin_oq_ci_offset) != 0x50);
8359         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8360                 admin_iq_element_array_addr) != 0x58);
8361         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8362                 admin_oq_element_array_addr) != 0x60);
8363         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8364                 admin_iq_ci_addr) != 0x68);
8365         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8366                 admin_oq_pi_addr) != 0x70);
8367         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8368                 admin_iq_num_elements) != 0x78);
8369         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8370                 admin_oq_num_elements) != 0x79);
8371         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8372                 admin_queue_int_msg_num) != 0x7a);
8373         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8374                 device_error) != 0x80);
8375         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8376                 error_details) != 0x88);
8377         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8378                 device_reset) != 0x90);
8379         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8380                 power_action) != 0x94);
8381         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
8382
8383         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8384                 header.iu_type) != 0);
8385         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8386                 header.iu_length) != 2);
8387         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8388                 header.work_area) != 6);
8389         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8390                 request_id) != 8);
8391         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8392                 function_code) != 10);
8393         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8394                 data.report_device_capability.buffer_length) != 44);
8395         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8396                 data.report_device_capability.sg_descriptor) != 48);
8397         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8398                 data.create_operational_iq.queue_id) != 12);
8399         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8400                 data.create_operational_iq.element_array_addr) != 16);
8401         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8402                 data.create_operational_iq.ci_addr) != 24);
8403         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8404                 data.create_operational_iq.num_elements) != 32);
8405         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8406                 data.create_operational_iq.element_length) != 34);
8407         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8408                 data.create_operational_iq.queue_protocol) != 36);
8409         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8410                 data.create_operational_oq.queue_id) != 12);
8411         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8412                 data.create_operational_oq.element_array_addr) != 16);
8413         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8414                 data.create_operational_oq.pi_addr) != 24);
8415         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8416                 data.create_operational_oq.num_elements) != 32);
8417         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8418                 data.create_operational_oq.element_length) != 34);
8419         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8420                 data.create_operational_oq.queue_protocol) != 36);
8421         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8422                 data.create_operational_oq.int_msg_num) != 40);
8423         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8424                 data.create_operational_oq.coalescing_count) != 42);
8425         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8426                 data.create_operational_oq.min_coalescing_time) != 44);
8427         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8428                 data.create_operational_oq.max_coalescing_time) != 48);
8429         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8430                 data.delete_operational_queue.queue_id) != 12);
8431         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
8432         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
8433                 data.create_operational_iq) != 64 - 11);
8434         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
8435                 data.create_operational_oq) != 64 - 11);
8436         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
8437                 data.delete_operational_queue) != 64 - 11);
8438
8439         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8440                 header.iu_type) != 0);
8441         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8442                 header.iu_length) != 2);
8443         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8444                 header.work_area) != 6);
8445         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8446                 request_id) != 8);
8447         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8448                 function_code) != 10);
8449         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8450                 status) != 11);
8451         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8452                 data.create_operational_iq.status_descriptor) != 12);
8453         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8454                 data.create_operational_iq.iq_pi_offset) != 16);
8455         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8456                 data.create_operational_oq.status_descriptor) != 12);
8457         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8458                 data.create_operational_oq.oq_ci_offset) != 16);
8459         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
8460
8461         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8462                 header.iu_type) != 0);
8463         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8464                 header.iu_length) != 2);
8465         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8466                 header.response_queue_id) != 4);
8467         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8468                 header.work_area) != 6);
8469         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8470                 request_id) != 8);
8471         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8472                 nexus_id) != 10);
8473         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8474                 buffer_length) != 12);
8475         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8476                 lun_number) != 16);
8477         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8478                 protocol_specific) != 24);
8479         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8480                 error_index) != 27);
8481         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8482                 cdb) != 32);
8483         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8484                 sg_descriptors) != 64);
8485         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
8486                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
8487
8488         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8489                 header.iu_type) != 0);
8490         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8491                 header.iu_length) != 2);
8492         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8493                 header.response_queue_id) != 4);
8494         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8495                 header.work_area) != 6);
8496         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8497                 request_id) != 8);
8498         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8499                 nexus_id) != 12);
8500         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8501                 buffer_length) != 16);
8502         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8503                 data_encryption_key_index) != 22);
8504         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8505                 encrypt_tweak_lower) != 24);
8506         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8507                 encrypt_tweak_upper) != 28);
8508         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8509                 cdb) != 32);
8510         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8511                 error_index) != 48);
8512         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8513                 num_sg_descriptors) != 50);
8514         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8515                 cdb_length) != 51);
8516         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8517                 lun_number) != 52);
8518         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8519                 sg_descriptors) != 64);
8520         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
8521                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
8522
8523         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8524                 header.iu_type) != 0);
8525         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8526                 header.iu_length) != 2);
8527         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8528                 request_id) != 8);
8529         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8530                 error_index) != 10);
8531
8532         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8533                 header.iu_type) != 0);
8534         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8535                 header.iu_length) != 2);
8536         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8537                 header.response_queue_id) != 4);
8538         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8539                 request_id) != 8);
8540         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8541                 data.report_event_configuration.buffer_length) != 12);
8542         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8543                 data.report_event_configuration.sg_descriptors) != 16);
8544         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8545                 data.set_event_configuration.global_event_oq_id) != 10);
8546         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8547                 data.set_event_configuration.buffer_length) != 12);
8548         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8549                 data.set_event_configuration.sg_descriptors) != 16);
8550
8551         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
8552                 max_inbound_iu_length) != 6);
8553         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
8554                 max_outbound_iu_length) != 14);
8555         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
8556
8557         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8558                 data_length) != 0);
8559         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8560                 iq_arbitration_priority_support_bitmask) != 8);
8561         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8562                 maximum_aw_a) != 9);
8563         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8564                 maximum_aw_b) != 10);
8565         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8566                 maximum_aw_c) != 11);
8567         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8568                 max_inbound_queues) != 16);
8569         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8570                 max_elements_per_iq) != 18);
8571         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8572                 max_iq_element_length) != 24);
8573         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8574                 min_iq_element_length) != 26);
8575         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8576                 max_outbound_queues) != 30);
8577         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8578                 max_elements_per_oq) != 32);
8579         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8580                 intr_coalescing_time_granularity) != 34);
8581         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8582                 max_oq_element_length) != 36);
8583         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8584                 min_oq_element_length) != 38);
8585         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8586                 iu_layer_descriptors) != 64);
8587         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
8588
8589         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
8590                 event_type) != 0);
8591         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
8592                 oq_id) != 2);
8593         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
8594
8595         BUILD_BUG_ON(offsetof(struct pqi_event_config,
8596                 num_event_descriptors) != 2);
8597         BUILD_BUG_ON(offsetof(struct pqi_event_config,
8598                 descriptors) != 4);
8599
8600         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
8601                 ARRAY_SIZE(pqi_supported_event_types));
8602
8603         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8604                 header.iu_type) != 0);
8605         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8606                 header.iu_length) != 2);
8607         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8608                 event_type) != 8);
8609         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8610                 event_id) != 10);
8611         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8612                 additional_event_id) != 12);
8613         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8614                 data) != 16);
8615         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
8616
8617         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8618                 header.iu_type) != 0);
8619         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8620                 header.iu_length) != 2);
8621         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8622                 event_type) != 8);
8623         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8624                 event_id) != 10);
8625         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8626                 additional_event_id) != 12);
8627         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
8628
8629         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8630                 header.iu_type) != 0);
8631         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8632                 header.iu_length) != 2);
8633         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8634                 request_id) != 8);
8635         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8636                 nexus_id) != 10);
8637         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8638                 lun_number) != 16);
8639         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8640                 protocol_specific) != 24);
8641         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8642                 outbound_queue_id_to_manage) != 26);
8643         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8644                 request_id_to_manage) != 28);
8645         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8646                 task_management_function) != 30);
8647         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
8648
8649         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8650                 header.iu_type) != 0);
8651         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8652                 header.iu_length) != 2);
8653         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8654                 request_id) != 8);
8655         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8656                 nexus_id) != 10);
8657         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8658                 additional_response_info) != 12);
8659         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8660                 response_code) != 15);
8661         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
8662
8663         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8664                 configured_logical_drive_count) != 0);
8665         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8666                 configuration_signature) != 1);
8667         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8668                 firmware_version) != 5);
8669         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8670                 extended_logical_unit_count) != 154);
8671         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8672                 firmware_build_number) != 190);
8673         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8674                 controller_mode) != 292);
8675
8676         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8677                 phys_bay_in_box) != 115);
8678         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8679                 device_type) != 120);
8680         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8681                 redundant_path_present_map) != 1736);
8682         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8683                 active_path_number) != 1738);
8684         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8685                 alternate_paths_phys_connector) != 1739);
8686         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8687                 alternate_paths_phys_box_on_port) != 1755);
8688         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8689                 current_queue_depth_limit) != 1796);
8690         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
8691
8692         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
8693         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
8694         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
8695                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8696         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
8697                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8698         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
8699         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
8700                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8701         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
8702         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
8703                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8704
8705         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
8706         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
8707                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
8708 }