drivers/scsi/hisi_sas/hisi_sas_main.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2015 Linaro Ltd.
   4  * Copyright (c) 2015 Hisilicon Limited.
   5  */
   6
   7 #include "hisi_sas.h"
   8 #define DRV_NAME "hisi_sas"
   9
  10 #define DEV_IS_GONE(dev) \
  11         ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
  12
  13 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
  14                                 u8 *lun, struct hisi_sas_tmf_task *tmf);
  15 static int
  16 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
  17                              struct domain_device *device,
  18                              int abort_flag, int tag);
  19 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
  20 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
  21                                 void *funcdata);
  22 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
  23                                   struct domain_device *device);
  24 static void hisi_sas_dev_gone(struct domain_device *device);
  25
  26 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
  27 {
  28         switch (fis->command) {
  29         case ATA_CMD_FPDMA_WRITE:
  30         case ATA_CMD_FPDMA_READ:
  31         case ATA_CMD_FPDMA_RECV:
  32         case ATA_CMD_FPDMA_SEND:
  33         case ATA_CMD_NCQ_NON_DATA:
  34                 return HISI_SAS_SATA_PROTOCOL_FPDMA;
  35
  36         case ATA_CMD_DOWNLOAD_MICRO:
  37         case ATA_CMD_ID_ATA:
  38         case ATA_CMD_PMP_READ:
  39         case ATA_CMD_READ_LOG_EXT:
  40         case ATA_CMD_PIO_READ:
  41         case ATA_CMD_PIO_READ_EXT:
  42         case ATA_CMD_PMP_WRITE:
  43         case ATA_CMD_WRITE_LOG_EXT:
  44         case ATA_CMD_PIO_WRITE:
  45         case ATA_CMD_PIO_WRITE_EXT:
  46                 return HISI_SAS_SATA_PROTOCOL_PIO;
  47
  48         case ATA_CMD_DSM:
  49         case ATA_CMD_DOWNLOAD_MICRO_DMA:
  50         case ATA_CMD_PMP_READ_DMA:
  51         case ATA_CMD_PMP_WRITE_DMA:
  52         case ATA_CMD_READ:
  53         case ATA_CMD_READ_EXT:
  54         case ATA_CMD_READ_LOG_DMA_EXT:
  55         case ATA_CMD_READ_STREAM_DMA_EXT:
  56         case ATA_CMD_TRUSTED_RCV_DMA:
  57         case ATA_CMD_TRUSTED_SND_DMA:
  58         case ATA_CMD_WRITE:
  59         case ATA_CMD_WRITE_EXT:
  60         case ATA_CMD_WRITE_FUA_EXT:
  61         case ATA_CMD_WRITE_QUEUED:
  62         case ATA_CMD_WRITE_LOG_DMA_EXT:
  63         case ATA_CMD_WRITE_STREAM_DMA_EXT:
  64         case ATA_CMD_ZAC_MGMT_IN:
  65                 return HISI_SAS_SATA_PROTOCOL_DMA;
  66
  67         case ATA_CMD_CHK_POWER:
  68         case ATA_CMD_DEV_RESET:
  69         case ATA_CMD_EDD:
  70         case ATA_CMD_FLUSH:
  71         case ATA_CMD_FLUSH_EXT:
  72         case ATA_CMD_VERIFY:
  73         case ATA_CMD_VERIFY_EXT:
  74         case ATA_CMD_SET_FEATURES:
  75         case ATA_CMD_STANDBY:
  76         case ATA_CMD_STANDBYNOW1:
  77         case ATA_CMD_ZAC_MGMT_OUT:
  78                 return HISI_SAS_SATA_PROTOCOL_NONDATA;
  79
  80         case ATA_CMD_SET_MAX:
  81                 switch (fis->features) {
  82                 case ATA_SET_MAX_PASSWD:
  83                 case ATA_SET_MAX_LOCK:
  84                         return HISI_SAS_SATA_PROTOCOL_PIO;
  85
  86                 case ATA_SET_MAX_PASSWD_DMA:
  87                 case ATA_SET_MAX_UNLOCK_DMA:
  88                         return HISI_SAS_SATA_PROTOCOL_DMA;
  89
  90                 default:
  91                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  92                 }
  93
  94         default:
  95         {
  96                 if (direction == DMA_NONE)
  97                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  98                 return HISI_SAS_SATA_PROTOCOL_PIO;
  99         }
 100         }
 101 }
 102 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
 103
 104 void hisi_sas_sata_done(struct sas_task *task,
 105                             struct hisi_sas_slot *slot)
 106 {
 107         struct task_status_struct *ts = &task->task_status;
 108         struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
 109         struct hisi_sas_status_buffer *status_buf =
 110                         hisi_sas_status_buf_addr_mem(slot);
 111         u8 *iu = &status_buf->iu[0];
 112         struct dev_to_host_fis *d2h =  (struct dev_to_host_fis *)iu;
 113
 114         resp->frame_len = sizeof(struct dev_to_host_fis);
 115         memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
 116
 117         ts->buf_valid_size = sizeof(*resp);
 118 }
 119 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
 120
 121 /*
 122  * This function assumes linkrate mask fits in 8 bits, which it
 123  * does for all HW versions supported.
 124  */
 125 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
 126 {
 127         u8 rate = 0;
 128         int i;
 129
 130         max -= SAS_LINK_RATE_1_5_GBPS;
 131         for (i = 0; i <= max; i++)
 132                 rate |= 1 << (i * 2);
 133         return rate;
 134 }
 135 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
 136
 137 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
 138 {
 139         return device->port->ha->lldd_ha;
 140 }
 141
 142 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
 143 {
 144         return container_of(sas_port, struct hisi_sas_port, sas_port);
 145 }
 146 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
 147
 148 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
 149 {
 150         int phy_no;
 151
 152         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
 153                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
 154 }
 155 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
 156
 157 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
 158 {
 159         void *bitmap = hisi_hba->slot_index_tags;
 160
 161         clear_bit(slot_idx, bitmap);
 162 }
 163
 164 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
 165 {
 166         if (hisi_hba->hw->slot_index_alloc ||
 167             slot_idx >= HISI_SAS_UNRESERVED_IPTT) {
 168                 spin_lock(&hisi_hba->lock);
 169                 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
 170                 spin_unlock(&hisi_hba->lock);
 171         }
 172 }
 173
 174 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
 175 {
 176         void *bitmap = hisi_hba->slot_index_tags;
 177
 178         set_bit(slot_idx, bitmap);
 179 }
 180
 181 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
 182                                      struct scsi_cmnd *scsi_cmnd)
 183 {
 184         int index;
 185         void *bitmap = hisi_hba->slot_index_tags;
 186
 187         if (scsi_cmnd)
 188                 return scsi_cmnd->request->tag;
 189
 190         spin_lock(&hisi_hba->lock);
 191         index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
 192                                    hisi_hba->last_slot_index + 1);
 193         if (index >= hisi_hba->slot_index_count) {
 194                 index = find_next_zero_bit(bitmap,
 195                                 hisi_hba->slot_index_count,
 196                                 HISI_SAS_UNRESERVED_IPTT);
 197                 if (index >= hisi_hba->slot_index_count) {
 198                         spin_unlock(&hisi_hba->lock);
 199                         return -SAS_QUEUE_FULL;
 200                 }
 201         }
 202         hisi_sas_slot_index_set(hisi_hba, index);
 203         hisi_hba->last_slot_index = index;
 204         spin_unlock(&hisi_hba->lock);
 205
 206         return index;
 207 }
 208
 209 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
 210 {
 211         int i;
 212
 213         for (i = 0; i < hisi_hba->slot_index_count; ++i)
 214                 hisi_sas_slot_index_clear(hisi_hba, i);
 215 }
 216
 217 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
 218                              struct hisi_sas_slot *slot)
 219 {
 220         int device_id = slot->device_id;
 221         struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
 222
 223         if (task) {
 224                 struct device *dev = hisi_hba->dev;
 225
 226                 if (!task->lldd_task)
 227                         return;
 228
 229                 task->lldd_task = NULL;
 230
 231                 if (!sas_protocol_ata(task->task_proto)) {
 232                         struct sas_ssp_task *ssp_task = &task->ssp_task;
 233                         struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 234
 235                         if (slot->n_elem)
 236                                 dma_unmap_sg(dev, task->scatter,
 237                                              task->num_scatter,
 238                                              task->data_dir);
 239                         if (slot->n_elem_dif)
 240                                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 241                                              scsi_prot_sg_count(scsi_cmnd),
 242                                              task->data_dir);
 243                 }
 244         }
 245
 246         spin_lock(&sas_dev->lock);
 247         list_del_init(&slot->entry);
 248         spin_unlock(&sas_dev->lock);
 249
 250         memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
 251
 252         hisi_sas_slot_index_free(hisi_hba, slot->idx);
 253 }
 254 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
 255
 256 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 257                                   struct hisi_sas_slot *slot)
 258 {
 259         hisi_hba->hw->prep_smp(hisi_hba, slot);
 260 }
 261
 262 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 263                                   struct hisi_sas_slot *slot)
 264 {
 265         hisi_hba->hw->prep_ssp(hisi_hba, slot);
 266 }
 267
 268 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 269                                   struct hisi_sas_slot *slot)
 270 {
 271         hisi_hba->hw->prep_stp(hisi_hba, slot);
 272 }
 273
 274 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
 275                 struct hisi_sas_slot *slot,
 276                 int device_id, int abort_flag, int tag_to_abort)
 277 {
 278         hisi_hba->hw->prep_abort(hisi_hba, slot,
 279                         device_id, abort_flag, tag_to_abort);
 280 }
 281
 282 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
 283                                struct sas_task *task, int n_elem,
 284                                int n_elem_req)
 285 {
 286         struct device *dev = hisi_hba->dev;
 287
 288         if (!sas_protocol_ata(task->task_proto)) {
 289                 if (task->num_scatter) {
 290                         if (n_elem)
 291                                 dma_unmap_sg(dev, task->scatter,
 292                                              task->num_scatter,
 293                                              task->data_dir);
 294                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 295                         if (n_elem_req)
 296                                 dma_unmap_sg(dev, &task->smp_task.smp_req,
 297                                              1, DMA_TO_DEVICE);
 298                 }
 299         }
 300 }
 301
 302 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
 303                             struct sas_task *task, int *n_elem,
 304                             int *n_elem_req)
 305 {
 306         struct device *dev = hisi_hba->dev;
 307         int rc;
 308
 309         if (sas_protocol_ata(task->task_proto)) {
 310                 *n_elem = task->num_scatter;
 311         } else {
 312                 unsigned int req_len;
 313
 314                 if (task->num_scatter) {
 315                         *n_elem = dma_map_sg(dev, task->scatter,
 316                                              task->num_scatter, task->data_dir);
 317                         if (!*n_elem) {
 318                                 rc = -ENOMEM;
 319                                 goto prep_out;
 320                         }
 321                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 322                         *n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
 323                                                  1, DMA_TO_DEVICE);
 324                         if (!*n_elem_req) {
 325                                 rc = -ENOMEM;
 326                                 goto prep_out;
 327                         }
 328                         req_len = sg_dma_len(&task->smp_task.smp_req);
 329                         if (req_len & 0x3) {
 330                                 rc = -EINVAL;
 331                                 goto err_out_dma_unmap;
 332                         }
 333                 }
 334         }
 335
 336         if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
 337                 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT",
 338                         *n_elem);
 339                 rc = -EINVAL;
 340                 goto err_out_dma_unmap;
 341         }
 342         return 0;
 343
 344 err_out_dma_unmap:
 345         /* It would be better to call dma_unmap_sg() here, but it's messy */
 346         hisi_sas_dma_unmap(hisi_hba, task, *n_elem,
 347                            *n_elem_req);
 348 prep_out:
 349         return rc;
 350 }
 351
 352 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
 353                                    struct sas_task *task, int n_elem_dif)
 354 {
 355         struct device *dev = hisi_hba->dev;
 356
 357         if (n_elem_dif) {
 358                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 359                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 360
 361                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 362                              scsi_prot_sg_count(scsi_cmnd),
 363                              task->data_dir);
 364         }
 365 }
 366
 367 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
 368                                 int *n_elem_dif, struct sas_task *task)
 369 {
 370         struct device *dev = hisi_hba->dev;
 371         struct sas_ssp_task *ssp_task;
 372         struct scsi_cmnd *scsi_cmnd;
 373         int rc;
 374
 375         if (task->num_scatter) {
 376                 ssp_task = &task->ssp_task;
 377                 scsi_cmnd = ssp_task->cmd;
 378
 379                 if (scsi_prot_sg_count(scsi_cmnd)) {
 380                         *n_elem_dif = dma_map_sg(dev,
 381                                                  scsi_prot_sglist(scsi_cmnd),
 382                                                  scsi_prot_sg_count(scsi_cmnd),
 383                                                  task->data_dir);
 384
 385                         if (!*n_elem_dif)
 386                                 return -ENOMEM;
 387
 388                         if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
 389                                 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
 390                                         *n_elem_dif);
 391                                 rc = -EINVAL;
 392                                 goto err_out_dif_dma_unmap;
 393                         }
 394                 }
 395         }
 396
 397         return 0;
 398
 399 err_out_dif_dma_unmap:
 400         dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 401                      scsi_prot_sg_count(scsi_cmnd), task->data_dir);
 402         return rc;
 403 }
 404
 405 static int hisi_sas_task_prep(struct sas_task *task,
 406                               struct hisi_sas_dq **dq_pointer,
 407                               bool is_tmf, struct hisi_sas_tmf_task *tmf,
 408                               int *pass)
 409 {
 410         struct domain_device *device = task->dev;
 411         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 412         struct hisi_sas_device *sas_dev = device->lldd_dev;
 413         struct hisi_sas_port *port;
 414         struct hisi_sas_slot *slot;
 415         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 416         struct asd_sas_port *sas_port = device->port;
 417         struct device *dev = hisi_hba->dev;
 418         int dlvry_queue_slot, dlvry_queue, rc, slot_idx;
 419         int n_elem = 0, n_elem_dif = 0, n_elem_req = 0;
 420         struct hisi_sas_dq *dq;
 421         unsigned long flags;
 422         int wr_q_index;
 423
 424         if (DEV_IS_GONE(sas_dev)) {
 425                 if (sas_dev)
 426                         dev_info(dev, "task prep: device %d not ready\n",
 427                                  sas_dev->device_id);
 428                 else
 429                         dev_info(dev, "task prep: device %016llx not ready\n",
 430                                  SAS_ADDR(device->sas_addr));
 431
 432                 return -ECOMM;
 433         }
 434
 435         if (hisi_hba->reply_map) {
 436                 int cpu = raw_smp_processor_id();
 437                 unsigned int dq_index = hisi_hba->reply_map[cpu];
 438
 439                 *dq_pointer = dq = &hisi_hba->dq[dq_index];
 440         } else {
 441                 *dq_pointer = dq = sas_dev->dq;
 442         }
 443
 444         port = to_hisi_sas_port(sas_port);
 445         if (port && !port->port_attached) {
 446                 dev_info(dev, "task prep: %s port%d not attach device\n",
 447                          (dev_is_sata(device)) ?
 448                          "SATA/STP" : "SAS",
 449                          device->port->id);
 450
 451                 return -ECOMM;
 452         }
 453
 454         rc = hisi_sas_dma_map(hisi_hba, task, &n_elem,
 455                               &n_elem_req);
 456         if (rc < 0)
 457                 goto prep_out;
 458
 459         if (!sas_protocol_ata(task->task_proto)) {
 460                 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
 461                 if (rc < 0)
 462                         goto err_out_dma_unmap;
 463         }
 464
 465         if (hisi_hba->hw->slot_index_alloc)
 466                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
 467         else {
 468                 struct scsi_cmnd *scsi_cmnd = NULL;
 469
 470                 if (task->uldd_task) {
 471                         struct ata_queued_cmd *qc;
 472
 473                         if (dev_is_sata(device)) {
 474                                 qc = task->uldd_task;
 475                                 scsi_cmnd = qc->scsicmd;
 476                         } else {
 477                                 scsi_cmnd = task->uldd_task;
 478                         }
 479                 }
 480                 rc  = hisi_sas_slot_index_alloc(hisi_hba, scsi_cmnd);
 481         }
 482         if (rc < 0)
 483                 goto err_out_dif_dma_unmap;
 484
 485         slot_idx = rc;
 486         slot = &hisi_hba->slot_info[slot_idx];
 487
 488         spin_lock(&dq->lock);
 489         wr_q_index = dq->wr_point;
 490         dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
 491         list_add_tail(&slot->delivery, &dq->list);
 492         spin_unlock(&dq->lock);
 493         spin_lock(&sas_dev->lock);
 494         list_add_tail(&slot->entry, &sas_dev->list);
 495         spin_unlock(&sas_dev->lock);
 496
 497         dlvry_queue = dq->id;
 498         dlvry_queue_slot = wr_q_index;
 499
 500         slot->device_id = sas_dev->device_id;
 501         slot->n_elem = n_elem;
 502         slot->n_elem_dif = n_elem_dif;
 503         slot->dlvry_queue = dlvry_queue;
 504         slot->dlvry_queue_slot = dlvry_queue_slot;
 505         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 506         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 507         slot->task = task;
 508         slot->port = port;
 509         slot->tmf = tmf;
 510         slot->is_internal = is_tmf;
 511         task->lldd_task = slot;
 512
 513         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 514         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
 515         memset(hisi_sas_status_buf_addr_mem(slot), 0,
 516                sizeof(struct hisi_sas_err_record));
 517
 518         switch (task->task_proto) {
 519         case SAS_PROTOCOL_SMP:
 520                 hisi_sas_task_prep_smp(hisi_hba, slot);
 521                 break;
 522         case SAS_PROTOCOL_SSP:
 523                 hisi_sas_task_prep_ssp(hisi_hba, slot);
 524                 break;
 525         case SAS_PROTOCOL_SATA:
 526         case SAS_PROTOCOL_STP:
 527         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 528                 hisi_sas_task_prep_ata(hisi_hba, slot);
 529                 break;
 530         default:
 531                 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
 532                         task->task_proto);
 533                 break;
 534         }
 535
 536         spin_lock_irqsave(&task->task_state_lock, flags);
 537         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 538         spin_unlock_irqrestore(&task->task_state_lock, flags);
 539
 540         ++(*pass);
 541         WRITE_ONCE(slot->ready, 1);
 542
 543         return 0;
 544
 545 err_out_dif_dma_unmap:
 546         if (!sas_protocol_ata(task->task_proto))
 547                 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
 548 err_out_dma_unmap:
 549         hisi_sas_dma_unmap(hisi_hba, task, n_elem,
 550                            n_elem_req);
 551 prep_out:
 552         dev_err(dev, "task prep: failed[%d]!\n", rc);
 553         return rc;
 554 }
 555
 556 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
 557                               bool is_tmf, struct hisi_sas_tmf_task *tmf)
 558 {
 559         u32 rc;
 560         u32 pass = 0;
 561         struct hisi_hba *hisi_hba;
 562         struct device *dev;
 563         struct domain_device *device = task->dev;
 564         struct asd_sas_port *sas_port = device->port;
 565         struct hisi_sas_dq *dq = NULL;
 566
 567         if (!sas_port) {
 568                 struct task_status_struct *ts = &task->task_status;
 569
 570                 ts->resp = SAS_TASK_UNDELIVERED;
 571                 ts->stat = SAS_PHY_DOWN;
 572                 /*
 573                  * libsas will use dev->port, should
 574                  * not call task_done for sata
 575                  */
 576                 if (device->dev_type != SAS_SATA_DEV)
 577                         task->task_done(task);
 578                 return -ECOMM;
 579         }
 580
 581         hisi_hba = dev_to_hisi_hba(device);
 582         dev = hisi_hba->dev;
 583
 584         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
 585                 /*
 586                  * For IOs from upper layer, it may already disable preempt
 587                  * in the IO path, if disable preempt again in down(),
 588                  * function schedule() will report schedule_bug(), so check
 589                  * preemptible() before goto down().
 590                  */
 591                 if (!preemptible())
 592                         return -EINVAL;
 593
 594                 down(&hisi_hba->sem);
 595                 up(&hisi_hba->sem);
 596         }
 597
 598         /* protect task_prep and start_delivery sequence */
 599         rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf, &pass);
 600         if (rc)
 601                 dev_err(dev, "task exec: failed[%d]!\n", rc);
 602
 603         if (likely(pass)) {
 604                 spin_lock(&dq->lock);
 605                 hisi_hba->hw->start_delivery(dq);
 606                 spin_unlock(&dq->lock);
 607         }
 608
 609         return rc;
 610 }
 611
 612 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
 613 {
 614         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 615         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 616         struct sas_ha_struct *sas_ha;
 617
 618         if (!phy->phy_attached)
 619                 return;
 620
 621         sas_ha = &hisi_hba->sha;
 622         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
 623
 624         if (sas_phy->phy) {
 625                 struct sas_phy *sphy = sas_phy->phy;
 626
 627                 sphy->negotiated_linkrate = sas_phy->linkrate;
 628                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 629                 sphy->maximum_linkrate_hw =
 630                         hisi_hba->hw->phy_get_max_linkrate();
 631                 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
 632                         sphy->minimum_linkrate = phy->minimum_linkrate;
 633
 634                 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
 635                         sphy->maximum_linkrate = phy->maximum_linkrate;
 636         }
 637
 638         if (phy->phy_type & PORT_TYPE_SAS) {
 639                 struct sas_identify_frame *id;
 640
 641                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 642                 id->dev_type = phy->identify.device_type;
 643                 id->initiator_bits = SAS_PROTOCOL_ALL;
 644                 id->target_bits = phy->identify.target_port_protocols;
 645         } else if (phy->phy_type & PORT_TYPE_SATA) {
 646                 /* Nothing */
 647         }
 648
 649         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 650         sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
 651 }
 652
 653 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 654 {
 655         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 656         struct hisi_sas_device *sas_dev = NULL;
 657         int last = hisi_hba->last_dev_id;
 658         int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
 659         int i;
 660
 661         spin_lock(&hisi_hba->lock);
 662         for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
 663                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 664                         int queue = i % hisi_hba->queue_count;
 665                         struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
 666
 667                         hisi_hba->devices[i].device_id = i;
 668                         sas_dev = &hisi_hba->devices[i];
 669                         sas_dev->dev_status = HISI_SAS_DEV_INIT;
 670                         sas_dev->dev_type = device->dev_type;
 671                         sas_dev->hisi_hba = hisi_hba;
 672                         sas_dev->sas_device = device;
 673                         sas_dev->dq = dq;
 674                         spin_lock_init(&sas_dev->lock);
 675                         INIT_LIST_HEAD(&hisi_hba->devices[i].list);
 676                         break;
 677                 }
 678                 i++;
 679         }
 680         hisi_hba->last_dev_id = i;
 681         spin_unlock(&hisi_hba->lock);
 682
 683         return sas_dev;
 684 }
 685
 686 #define HISI_SAS_DISK_RECOVER_CNT 3
 687 static int hisi_sas_init_device(struct domain_device *device)
 688 {
 689         int rc = TMF_RESP_FUNC_COMPLETE;
 690         struct scsi_lun lun;
 691         struct hisi_sas_tmf_task tmf_task;
 692         int retry = HISI_SAS_DISK_RECOVER_CNT;
 693         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 694         struct device *dev = hisi_hba->dev;
 695         struct sas_phy *local_phy;
 696
 697         switch (device->dev_type) {
 698         case SAS_END_DEVICE:
 699                 int_to_scsilun(0, &lun);
 700
 701                 tmf_task.tmf = TMF_CLEAR_TASK_SET;
 702                 while (retry-- > 0) {
 703                         rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
 704                                                           &tmf_task);
 705                         if (rc == TMF_RESP_FUNC_COMPLETE) {
 706                                 hisi_sas_release_task(hisi_hba, device);
 707                                 break;
 708                         }
 709                 }
 710                 break;
 711         case SAS_SATA_DEV:
 712         case SAS_SATA_PM:
 713         case SAS_SATA_PM_PORT:
 714         case SAS_SATA_PENDING:
 715                 /*
 716                  * send HARD RESET to clear previous affiliation of
 717                  * STP target port
 718                  */
 719                 local_phy = sas_get_local_phy(device);
 720                 if (!scsi_is_sas_phy_local(local_phy) &&
 721                     !test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
 722                         unsigned long deadline = ata_deadline(jiffies, 20000);
 723                         struct sata_device *sata_dev = &device->sata_dev;
 724                         struct ata_host *ata_host = sata_dev->ata_host;
 725                         struct ata_port_operations *ops = ata_host->ops;
 726                         struct ata_port *ap = sata_dev->ap;
 727                         struct ata_link *link;
 728                         unsigned int classes;
 729
 730                         ata_for_each_link(link, ap, EDGE)
 731                                 rc = ops->hardreset(link, &classes,
 732                                                     deadline);
 733                 }
 734                 sas_put_local_phy(local_phy);
 735                 if (rc) {
 736                         dev_warn(dev, "SATA disk hardreset fail: %d\n", rc);
 737                         return rc;
 738                 }
 739
 740                 while (retry-- > 0) {
 741                         rc = hisi_sas_softreset_ata_disk(device);
 742                         if (!rc)
 743                                 break;
 744                 }
 745                 break;
 746         default:
 747                 break;
 748         }
 749
 750         return rc;
 751 }
 752
 753 static int hisi_sas_dev_found(struct domain_device *device)
 754 {
 755         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 756         struct domain_device *parent_dev = device->parent;
 757         struct hisi_sas_device *sas_dev;
 758         struct device *dev = hisi_hba->dev;
 759         int rc;
 760
 761         if (hisi_hba->hw->alloc_dev)
 762                 sas_dev = hisi_hba->hw->alloc_dev(device);
 763         else
 764                 sas_dev = hisi_sas_alloc_dev(device);
 765         if (!sas_dev) {
 766                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 767                         HISI_SAS_MAX_DEVICES);
 768                 return -EINVAL;
 769         }
 770
 771         device->lldd_dev = sas_dev;
 772         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 773
 774         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 775                 int phy_no;
 776                 u8 phy_num = parent_dev->ex_dev.num_phys;
 777                 struct ex_phy *phy;
 778
 779                 for (phy_no = 0; phy_no < phy_num; phy_no++) {
 780                         phy = &parent_dev->ex_dev.ex_phy[phy_no];
 781                         if (SAS_ADDR(phy->attached_sas_addr) ==
 782                                 SAS_ADDR(device->sas_addr))
 783                                 break;
 784                 }
 785
 786                 if (phy_no == phy_num) {
 787                         dev_info(dev, "dev found: no attached "
 788                                  "dev:%016llx at ex:%016llx\n",
 789                                  SAS_ADDR(device->sas_addr),
 790                                  SAS_ADDR(parent_dev->sas_addr));
 791                         rc = -EINVAL;
 792                         goto err_out;
 793                 }
 794         }
 795
 796         dev_info(dev, "dev[%d:%x] found\n",
 797                 sas_dev->device_id, sas_dev->dev_type);
 798
 799         rc = hisi_sas_init_device(device);
 800         if (rc)
 801                 goto err_out;
 802         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 803         return 0;
 804
 805 err_out:
 806         hisi_sas_dev_gone(device);
 807         return rc;
 808 }
 809
 810 int hisi_sas_slave_configure(struct scsi_device *sdev)
 811 {
 812         struct domain_device *dev = sdev_to_domain_dev(sdev);
 813         int ret = sas_slave_configure(sdev);
 814
 815         if (ret)
 816                 return ret;
 817         if (!dev_is_sata(dev))
 818                 sas_change_queue_depth(sdev, 64);
 819
 820         return 0;
 821 }
 822 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
 823
 824 void hisi_sas_scan_start(struct Scsi_Host *shost)
 825 {
 826         struct hisi_hba *hisi_hba = shost_priv(shost);
 827
 828         hisi_hba->hw->phys_init(hisi_hba);
 829 }
 830 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
 831
 832 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 833 {
 834         struct hisi_hba *hisi_hba = shost_priv(shost);
 835         struct sas_ha_struct *sha = &hisi_hba->sha;
 836
 837         /* Wait for PHY up interrupt to occur */
 838         if (time < HZ)
 839                 return 0;
 840
 841         sas_drain_work(sha);
 842         return 1;
 843 }
 844 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
 845
 846 static void hisi_sas_phyup_work(struct work_struct *work)
 847 {
 848         struct hisi_sas_phy *phy =
 849                 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
 850         struct hisi_hba *hisi_hba = phy->hisi_hba;
 851         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 852         int phy_no = sas_phy->id;
 853
 854         if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
 855                 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
 856         hisi_sas_bytes_dmaed(hisi_hba, phy_no);
 857 }
 858
 859 static void hisi_sas_linkreset_work(struct work_struct *work)
 860 {
 861         struct hisi_sas_phy *phy =
 862                 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
 863         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 864
 865         hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
 866 }
 867
 868 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
 869         [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
 870         [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
 871 };
 872
 873 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
 874                                 enum hisi_sas_phy_event event)
 875 {
 876         struct hisi_hba *hisi_hba = phy->hisi_hba;
 877
 878         if (WARN_ON(event >= HISI_PHYES_NUM))
 879                 return false;
 880
 881         return queue_work(hisi_hba->wq, &phy->works[event]);
 882 }
 883 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
 884
 885 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
 886 {
 887         struct hisi_sas_phy *phy = from_timer(phy, t, timer);
 888         struct hisi_hba *hisi_hba = phy->hisi_hba;
 889         struct device *dev = hisi_hba->dev;
 890         int phy_no = phy->sas_phy.id;
 891
 892         dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
 893         hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
 894 }
 895
 896 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
 897 {
 898         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 899         struct device *dev = hisi_hba->dev;
 900
 901         dev_dbg(dev, "phy%d OOB ready\n", phy_no);
 902         if (phy->phy_attached)
 903                 return;
 904
 905         if (!timer_pending(&phy->timer)) {
 906                 phy->timer.expires = jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT * HZ;
 907                 add_timer(&phy->timer);
 908         }
 909 }
 910 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
 911
 912 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
 913 {
 914         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 915         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 916         int i;
 917
 918         phy->hisi_hba = hisi_hba;
 919         phy->port = NULL;
 920         phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
 921         phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
 922         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 923         sas_phy->class = SAS;
 924         sas_phy->iproto = SAS_PROTOCOL_ALL;
 925         sas_phy->tproto = 0;
 926         sas_phy->type = PHY_TYPE_PHYSICAL;
 927         sas_phy->role = PHY_ROLE_INITIATOR;
 928         sas_phy->oob_mode = OOB_NOT_CONNECTED;
 929         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 930         sas_phy->id = phy_no;
 931         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
 932         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
 933         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
 934         sas_phy->lldd_phy = phy;
 935
 936         for (i = 0; i < HISI_PHYES_NUM; i++)
 937                 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
 938
 939         spin_lock_init(&phy->lock);
 940
 941         timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
 942 }
 943
 944 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
 945 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
 946 {
 947         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 948         struct asd_sas_phy *aphy = &phy->sas_phy;
 949         struct sas_phy *sphy = aphy->phy;
 950         unsigned long flags;
 951
 952         spin_lock_irqsave(&phy->lock, flags);
 953
 954         if (enable) {
 955                 /* We may have been enabled already; if so, don't touch */
 956                 if (!phy->enable)
 957                         sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
 958                 hisi_hba->hw->phy_start(hisi_hba, phy_no);
 959         } else {
 960                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
 961                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 962         }
 963         phy->enable = enable;
 964         spin_unlock_irqrestore(&phy->lock, flags);
 965 }
 966 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
 967
 968 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
 969 {
 970         struct sas_ha_struct *sas_ha = sas_phy->ha;
 971         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 972         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 973         struct asd_sas_port *sas_port = sas_phy->port;
 974         struct hisi_sas_port *port;
 975         unsigned long flags;
 976
 977         if (!sas_port)
 978                 return;
 979
 980         port = to_hisi_sas_port(sas_port);
 981         spin_lock_irqsave(&hisi_hba->lock, flags);
 982         port->port_attached = 1;
 983         port->id = phy->port_id;
 984         phy->port = port;
 985         sas_port->lldd_port = port;
 986         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 987 }
 988
 989 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
 990                                      struct hisi_sas_slot *slot)
 991 {
 992         if (task) {
 993                 unsigned long flags;
 994                 struct task_status_struct *ts;
 995
 996                 ts = &task->task_status;
 997
 998                 ts->resp = SAS_TASK_COMPLETE;
 999                 ts->stat = SAS_ABORTED_TASK;
1000                 spin_lock_irqsave(&task->task_state_lock, flags);
1001                 task->task_state_flags &=
1002                         ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1003                 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1004                         task->task_state_flags |= SAS_TASK_STATE_DONE;
1005                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1006         }
1007
1008         hisi_sas_slot_task_free(hisi_hba, task, slot);
1009 }
1010
1011 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1012                         struct domain_device *device)
1013 {
1014         struct hisi_sas_slot *slot, *slot2;
1015         struct hisi_sas_device *sas_dev = device->lldd_dev;
1016
1017         list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1018                 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
1019 }
1020
1021 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1022 {
1023         struct hisi_sas_device *sas_dev;
1024         struct domain_device *device;
1025         int i;
1026
1027         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1028                 sas_dev = &hisi_hba->devices[i];
1029                 device = sas_dev->sas_device;
1030
1031                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1032                     !device)
1033                         continue;
1034
1035                 hisi_sas_release_task(hisi_hba, device);
1036         }
1037 }
1038 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1039
1040 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1041                                 struct domain_device *device)
1042 {
1043         if (hisi_hba->hw->dereg_device)
1044                 hisi_hba->hw->dereg_device(hisi_hba, device);
1045 }
1046
1047 static void hisi_sas_dev_gone(struct domain_device *device)
1048 {
1049         struct hisi_sas_device *sas_dev = device->lldd_dev;
1050         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1051         struct device *dev = hisi_hba->dev;
1052         int ret = 0;
1053
1054         dev_info(dev, "dev[%d:%x] is gone\n",
1055                  sas_dev->device_id, sas_dev->dev_type);
1056
1057         down(&hisi_hba->sem);
1058         if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
1059                 hisi_sas_internal_task_abort(hisi_hba, device,
1060                                              HISI_SAS_INT_ABT_DEV, 0);
1061
1062                 hisi_sas_dereg_device(hisi_hba, device);
1063
1064                 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1065                 device->lldd_dev = NULL;
1066         }
1067
1068         if (hisi_hba->hw->free_device)
1069                 hisi_hba->hw->free_device(sas_dev);
1070
1071         /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1072         if (!ret)
1073                 sas_dev->dev_type = SAS_PHY_UNUSED;
1074         sas_dev->sas_device = NULL;
1075         up(&hisi_hba->sem);
1076 }
1077
1078 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
1079 {
1080         return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
1081 }
1082
1083 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1084                         struct sas_phy_linkrates *r)
1085 {
1086         struct sas_phy_linkrates _r;
1087
1088         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1089         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1090         enum sas_linkrate min, max;
1091
1092         if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1093                 return -EINVAL;
1094
1095         if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1096                 max = sas_phy->phy->maximum_linkrate;
1097                 min = r->minimum_linkrate;
1098         } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1099                 max = r->maximum_linkrate;
1100                 min = sas_phy->phy->minimum_linkrate;
1101         } else
1102                 return -EINVAL;
1103
1104         _r.maximum_linkrate = max;
1105         _r.minimum_linkrate = min;
1106
1107         sas_phy->phy->maximum_linkrate = max;
1108         sas_phy->phy->minimum_linkrate = min;
1109
1110         hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1111         msleep(100);
1112         hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1113         hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1114
1115         return 0;
1116 }
1117
1118 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1119                                 void *funcdata)
1120 {
1121         struct sas_ha_struct *sas_ha = sas_phy->ha;
1122         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1123         int phy_no = sas_phy->id;
1124
1125         switch (func) {
1126         case PHY_FUNC_HARD_RESET:
1127                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1128                 break;
1129
1130         case PHY_FUNC_LINK_RESET:
1131                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1132                 msleep(100);
1133                 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1134                 break;
1135
1136         case PHY_FUNC_DISABLE:
1137                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1138                 break;
1139
1140         case PHY_FUNC_SET_LINK_RATE:
1141                 return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1142         case PHY_FUNC_GET_EVENTS:
1143                 if (hisi_hba->hw->get_events) {
1144                         hisi_hba->hw->get_events(hisi_hba, phy_no);
1145                         break;
1146                 }
1147                 fallthrough;
1148         case PHY_FUNC_RELEASE_SPINUP_HOLD:
1149         default:
1150                 return -EOPNOTSUPP;
1151         }
1152         return 0;
1153 }
1154
1155 static void hisi_sas_task_done(struct sas_task *task)
1156 {
1157         del_timer(&task->slow_task->timer);
1158         complete(&task->slow_task->completion);
1159 }
1160
1161 static void hisi_sas_tmf_timedout(struct timer_list *t)
1162 {
1163         struct sas_task_slow *slow = from_timer(slow, t, timer);
1164         struct sas_task *task = slow->task;
1165         unsigned long flags;
1166         bool is_completed = true;
1167
1168         spin_lock_irqsave(&task->task_state_lock, flags);
1169         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1170                 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1171                 is_completed = false;
1172         }
1173         spin_unlock_irqrestore(&task->task_state_lock, flags);
1174
1175         if (!is_completed)
1176                 complete(&task->slow_task->completion);
1177 }
1178
1179 #define TASK_TIMEOUT 20
1180 #define TASK_RETRY 3
1181 #define INTERNAL_ABORT_TIMEOUT 6
1182 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
1183                                            void *parameter, u32 para_len,
1184                                            struct hisi_sas_tmf_task *tmf)
1185 {
1186         struct hisi_sas_device *sas_dev = device->lldd_dev;
1187         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1188         struct device *dev = hisi_hba->dev;
1189         struct sas_task *task;
1190         int res, retry;
1191
1192         for (retry = 0; retry < TASK_RETRY; retry++) {
1193                 task = sas_alloc_slow_task(GFP_KERNEL);
1194                 if (!task)
1195                         return -ENOMEM;
1196
1197                 task->dev = device;
1198                 task->task_proto = device->tproto;
1199
1200                 if (dev_is_sata(device)) {
1201                         task->ata_task.device_control_reg_update = 1;
1202                         memcpy(&task->ata_task.fis, parameter, para_len);
1203                 } else {
1204                         memcpy(&task->ssp_task, parameter, para_len);
1205                 }
1206                 task->task_done = hisi_sas_task_done;
1207
1208                 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1209                 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT * HZ;
1210                 add_timer(&task->slow_task->timer);
1211
1212                 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
1213
1214                 if (res) {
1215                         del_timer(&task->slow_task->timer);
1216                         dev_err(dev, "abort tmf: executing internal task failed: %d\n",
1217                                 res);
1218                         goto ex_err;
1219                 }
1220
1221                 wait_for_completion(&task->slow_task->completion);
1222                 res = TMF_RESP_FUNC_FAILED;
1223                 /* Even TMF timed out, return direct. */
1224                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1225                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1226                                 struct hisi_sas_slot *slot = task->lldd_task;
1227
1228                                 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1229                                 if (slot) {
1230                                         struct hisi_sas_cq *cq =
1231                                                &hisi_hba->cq[slot->dlvry_queue];
1232                                         /*
1233                                          * sync irq to avoid free'ing task
1234                                          * before using task in IO completion
1235                                          */
1236                                         synchronize_irq(cq->irq_no);
1237                                         slot->task = NULL;
1238                                 }
1239
1240                                 goto ex_err;
1241                         } else
1242                                 dev_err(dev, "abort tmf: TMF task timeout\n");
1243                 }
1244
1245                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1246                      task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1247                         res = TMF_RESP_FUNC_COMPLETE;
1248                         break;
1249                 }
1250
1251                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1252                         task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1253                         res = TMF_RESP_FUNC_SUCC;
1254                         break;
1255                 }
1256
1257                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1258                       task->task_status.stat == SAS_DATA_UNDERRUN) {
1259                         /* no error, but return the number of bytes of
1260                          * underrun
1261                          */
1262                         dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x sts 0x%x underrun\n",
1263                                  SAS_ADDR(device->sas_addr),
1264                                  task->task_status.resp,
1265                                  task->task_status.stat);
1266                         res = task->task_status.residual;
1267                         break;
1268                 }
1269
1270                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1271                         task->task_status.stat == SAS_DATA_OVERRUN) {
1272                         dev_warn(dev, "abort tmf: blocked task error\n");
1273                         res = -EMSGSIZE;
1274                         break;
1275                 }
1276
1277                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1278                     task->task_status.stat == SAS_OPEN_REJECT) {
1279                         dev_warn(dev, "abort tmf: open reject failed\n");
1280                         res = -EIO;
1281                 } else {
1282                         dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x status 0x%x\n",
1283                                  SAS_ADDR(device->sas_addr),
1284                                  task->task_status.resp,
1285                                  task->task_status.stat);
1286                 }
1287                 sas_free_task(task);
1288                 task = NULL;
1289         }
1290 ex_err:
1291         if (retry == TASK_RETRY)
1292                 dev_warn(dev, "abort tmf: executing internal task failed!\n");
1293         sas_free_task(task);
1294         return res;
1295 }
1296
1297 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1298                 bool reset, int pmp, u8 *fis)
1299 {
1300         struct ata_taskfile tf;
1301
1302         ata_tf_init(dev, &tf);
1303         if (reset)
1304                 tf.ctl |= ATA_SRST;
1305         else
1306                 tf.ctl &= ~ATA_SRST;
1307         tf.command = ATA_CMD_DEV_RESET;
1308         ata_tf_to_fis(&tf, pmp, 0, fis);
1309 }
1310
1311 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1312 {
1313         u8 fis[20] = {0};
1314         struct ata_port *ap = device->sata_dev.ap;
1315         struct ata_link *link;
1316         int rc = TMF_RESP_FUNC_FAILED;
1317         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1318         struct device *dev = hisi_hba->dev;
1319         int s = sizeof(struct host_to_dev_fis);
1320
1321         ata_for_each_link(link, ap, EDGE) {
1322                 int pmp = sata_srst_pmp(link);
1323
1324                 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1325                 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1326                 if (rc != TMF_RESP_FUNC_COMPLETE)
1327                         break;
1328         }
1329
1330         if (rc == TMF_RESP_FUNC_COMPLETE) {
1331                 ata_for_each_link(link, ap, EDGE) {
1332                         int pmp = sata_srst_pmp(link);
1333
1334                         hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1335                         rc = hisi_sas_exec_internal_tmf_task(device, fis,
1336                                                              s, NULL);
1337                         if (rc != TMF_RESP_FUNC_COMPLETE)
1338                                 dev_err(dev, "ata disk de-reset failed\n");
1339                 }
1340         } else {
1341                 dev_err(dev, "ata disk reset failed\n");
1342         }
1343
1344         if (rc == TMF_RESP_FUNC_COMPLETE)
1345                 hisi_sas_release_task(hisi_hba, device);
1346
1347         return rc;
1348 }
1349
1350 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1351                                 u8 *lun, struct hisi_sas_tmf_task *tmf)
1352 {
1353         struct sas_ssp_task ssp_task;
1354
1355         if (!(device->tproto & SAS_PROTOCOL_SSP))
1356                 return TMF_RESP_FUNC_ESUPP;
1357
1358         memcpy(ssp_task.LUN, lun, 8);
1359
1360         return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1361                                 sizeof(ssp_task), tmf);
1362 }
1363
1364 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1365 {
1366         u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1367         int i;
1368
1369         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1370                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1371                 struct domain_device *device = sas_dev->sas_device;
1372                 struct asd_sas_port *sas_port;
1373                 struct hisi_sas_port *port;
1374                 struct hisi_sas_phy *phy = NULL;
1375                 struct asd_sas_phy *sas_phy;
1376
1377                 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1378                                 || !device || !device->port)
1379                         continue;
1380
1381                 sas_port = device->port;
1382                 port = to_hisi_sas_port(sas_port);
1383
1384                 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1385                         if (state & BIT(sas_phy->id)) {
1386                                 phy = sas_phy->lldd_phy;
1387                                 break;
1388                         }
1389
1390                 if (phy) {
1391                         port->id = phy->port_id;
1392
1393                         /* Update linkrate of directly attached device. */
1394                         if (!device->parent)
1395                                 device->linkrate = phy->sas_phy.linkrate;
1396
1397                         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1398                 } else
1399                         port->id = 0xff;
1400         }
1401 }
1402
1403 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1404 {
1405         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1406         struct asd_sas_port *_sas_port = NULL;
1407         int phy_no;
1408
1409         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1410                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1411                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1412                 struct asd_sas_port *sas_port = sas_phy->port;
1413                 bool do_port_check = _sas_port != sas_port;
1414
1415                 if (!sas_phy->phy->enabled)
1416                         continue;
1417
1418                 /* Report PHY state change to libsas */
1419                 if (state & BIT(phy_no)) {
1420                         if (do_port_check && sas_port && sas_port->port_dev) {
1421                                 struct domain_device *dev = sas_port->port_dev;
1422
1423                                 _sas_port = sas_port;
1424
1425                                 if (dev_is_expander(dev->dev_type))
1426                                         sas_ha->notify_port_event(sas_phy,
1427                                                         PORTE_BROADCAST_RCVD);
1428                         }
1429                 } else {
1430                         hisi_sas_phy_down(hisi_hba, phy_no, 0);
1431                 }
1432
1433         }
1434 }
1435
1436 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1437 {
1438         struct hisi_sas_device *sas_dev;
1439         struct domain_device *device;
1440         int i;
1441
1442         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1443                 sas_dev = &hisi_hba->devices[i];
1444                 device = sas_dev->sas_device;
1445
1446                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1447                         continue;
1448
1449                 hisi_sas_init_device(device);
1450         }
1451 }
1452
1453 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1454                                              struct asd_sas_port *sas_port,
1455                                              struct domain_device *device)
1456 {
1457         struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
1458         struct ata_port *ap = device->sata_dev.ap;
1459         struct device *dev = hisi_hba->dev;
1460         int s = sizeof(struct host_to_dev_fis);
1461         int rc = TMF_RESP_FUNC_FAILED;
1462         struct asd_sas_phy *sas_phy;
1463         struct ata_link *link;
1464         u8 fis[20] = {0};
1465         u32 state;
1466
1467         state = hisi_hba->hw->get_phys_state(hisi_hba);
1468         list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) {
1469                 if (!(state & BIT(sas_phy->id)))
1470                         continue;
1471
1472                 ata_for_each_link(link, ap, EDGE) {
1473                         int pmp = sata_srst_pmp(link);
1474
1475                         tmf_task.phy_id = sas_phy->id;
1476                         hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1477                         rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
1478                                                              &tmf_task);
1479                         if (rc != TMF_RESP_FUNC_COMPLETE) {
1480                                 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1481                                         sas_phy->id, rc);
1482                                 break;
1483                         }
1484                 }
1485         }
1486 }
1487
1488 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1489 {
1490         struct device *dev = hisi_hba->dev;
1491         int port_no, rc, i;
1492
1493         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1494                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1495                 struct domain_device *device = sas_dev->sas_device;
1496
1497                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1498                         continue;
1499
1500                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1501                                                   HISI_SAS_INT_ABT_DEV, 0);
1502                 if (rc < 0)
1503                         dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1504         }
1505
1506         for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1507                 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1508                 struct asd_sas_port *sas_port = &port->sas_port;
1509                 struct domain_device *port_dev = sas_port->port_dev;
1510                 struct domain_device *device;
1511
1512                 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1513                         continue;
1514
1515                 /* Try to find a SATA device */
1516                 list_for_each_entry(device, &sas_port->dev_list,
1517                                     dev_list_node) {
1518                         if (dev_is_sata(device)) {
1519                                 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1520                                                                  sas_port,
1521                                                                  device);
1522                                 break;
1523                         }
1524                 }
1525         }
1526 }
1527
1528 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1529 {
1530         struct Scsi_Host *shost = hisi_hba->shost;
1531
1532         down(&hisi_hba->sem);
1533         hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1534
1535         scsi_block_requests(shost);
1536         hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1537
1538         if (timer_pending(&hisi_hba->timer))
1539                 del_timer_sync(&hisi_hba->timer);
1540
1541         set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1542 }
1543 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1544
1545 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1546 {
1547         struct Scsi_Host *shost = hisi_hba->shost;
1548         u32 state;
1549
1550         /* Init and wait for PHYs to come up and all libsas event finished. */
1551         hisi_hba->hw->phys_init(hisi_hba);
1552         msleep(1000);
1553         hisi_sas_refresh_port_id(hisi_hba);
1554         clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1555
1556         if (hisi_hba->reject_stp_links_msk)
1557                 hisi_sas_terminate_stp_reject(hisi_hba);
1558         hisi_sas_reset_init_all_devices(hisi_hba);
1559         up(&hisi_hba->sem);
1560         scsi_unblock_requests(shost);
1561         clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1562
1563         state = hisi_hba->hw->get_phys_state(hisi_hba);
1564         hisi_sas_rescan_topology(hisi_hba, state);
1565 }
1566 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1567
1568 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1569 {
1570         struct device *dev = hisi_hba->dev;
1571         struct Scsi_Host *shost = hisi_hba->shost;
1572         int rc;
1573
1574         if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1575                 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
1576
1577         if (!hisi_hba->hw->soft_reset)
1578                 return -1;
1579
1580         if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1581                 return -1;
1582
1583         dev_info(dev, "controller resetting...\n");
1584         hisi_sas_controller_reset_prepare(hisi_hba);
1585
1586         rc = hisi_hba->hw->soft_reset(hisi_hba);
1587         if (rc) {
1588                 dev_warn(dev, "controller reset failed (%d)\n", rc);
1589                 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1590                 up(&hisi_hba->sem);
1591                 scsi_unblock_requests(shost);
1592                 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1593                 return rc;
1594         }
1595
1596         hisi_sas_controller_reset_done(hisi_hba);
1597         dev_info(dev, "controller reset complete\n");
1598
1599         return 0;
1600 }
1601
1602 static int hisi_sas_abort_task(struct sas_task *task)
1603 {
1604         struct scsi_lun lun;
1605         struct hisi_sas_tmf_task tmf_task;
1606         struct domain_device *device = task->dev;
1607         struct hisi_sas_device *sas_dev = device->lldd_dev;
1608         struct hisi_hba *hisi_hba;
1609         struct device *dev;
1610         int rc = TMF_RESP_FUNC_FAILED;
1611         unsigned long flags;
1612
1613         if (!sas_dev)
1614                 return TMF_RESP_FUNC_FAILED;
1615
1616         hisi_hba = dev_to_hisi_hba(task->dev);
1617         dev = hisi_hba->dev;
1618
1619         spin_lock_irqsave(&task->task_state_lock, flags);
1620         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1621                 struct hisi_sas_slot *slot = task->lldd_task;
1622                 struct hisi_sas_cq *cq;
1623
1624                 if (slot) {
1625                         /*
1626                          * sync irq to avoid free'ing task
1627                          * before using task in IO completion
1628                          */
1629                         cq = &hisi_hba->cq[slot->dlvry_queue];
1630                         synchronize_irq(cq->irq_no);
1631                 }
1632                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1633                 rc = TMF_RESP_FUNC_COMPLETE;
1634                 goto out;
1635         }
1636         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1637         spin_unlock_irqrestore(&task->task_state_lock, flags);
1638
1639         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1640                 struct scsi_cmnd *cmnd = task->uldd_task;
1641                 struct hisi_sas_slot *slot = task->lldd_task;
1642                 u16 tag = slot->idx;
1643                 int rc2;
1644
1645                 int_to_scsilun(cmnd->device->lun, &lun);
1646                 tmf_task.tmf = TMF_ABORT_TASK;
1647                 tmf_task.tag_of_task_to_be_managed = tag;
1648
1649                 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1650                                                   &tmf_task);
1651
1652                 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1653                                                    HISI_SAS_INT_ABT_CMD, tag);
1654                 if (rc2 < 0) {
1655                         dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1656                         return TMF_RESP_FUNC_FAILED;
1657                 }
1658
1659                 /*
1660                  * If the TMF finds that the IO is not in the device and also
1661                  * the internal abort does not succeed, then it is safe to
1662                  * free the slot.
1663                  * Note: if the internal abort succeeds then the slot
1664                  * will have already been completed
1665                  */
1666                 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1667                         if (task->lldd_task)
1668                                 hisi_sas_do_release_task(hisi_hba, task, slot);
1669                 }
1670         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1671                 task->task_proto & SAS_PROTOCOL_STP) {
1672                 if (task->dev->dev_type == SAS_SATA_DEV) {
1673                         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1674                                                           HISI_SAS_INT_ABT_DEV,
1675                                                           0);
1676                         if (rc < 0) {
1677                                 dev_err(dev, "abort task: internal abort failed\n");
1678                                 goto out;
1679                         }
1680                         hisi_sas_dereg_device(hisi_hba, device);
1681                         rc = hisi_sas_softreset_ata_disk(device);
1682                 }
1683         } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1684                 /* SMP */
1685                 struct hisi_sas_slot *slot = task->lldd_task;
1686                 u32 tag = slot->idx;
1687                 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1688
1689                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1690                                                   HISI_SAS_INT_ABT_CMD, tag);
1691                 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1692                                         task->lldd_task) {
1693                         /*
1694                          * sync irq to avoid free'ing task
1695                          * before using task in IO completion
1696                          */
1697                         synchronize_irq(cq->irq_no);
1698                         slot->task = NULL;
1699                 }
1700         }
1701
1702 out:
1703         if (rc != TMF_RESP_FUNC_COMPLETE)
1704                 dev_notice(dev, "abort task: rc=%d\n", rc);
1705         return rc;
1706 }
1707
1708 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1709 {
1710         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1711         struct device *dev = hisi_hba->dev;
1712         struct hisi_sas_tmf_task tmf_task;
1713         int rc;
1714
1715         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1716                                           HISI_SAS_INT_ABT_DEV, 0);
1717         if (rc < 0) {
1718                 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1719                 return TMF_RESP_FUNC_FAILED;
1720         }
1721         hisi_sas_dereg_device(hisi_hba, device);
1722
1723         tmf_task.tmf = TMF_ABORT_TASK_SET;
1724         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1725
1726         if (rc == TMF_RESP_FUNC_COMPLETE)
1727                 hisi_sas_release_task(hisi_hba, device);
1728
1729         return rc;
1730 }
1731
1732 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1733 {
1734         struct hisi_sas_tmf_task tmf_task;
1735         int rc;
1736
1737         tmf_task.tmf = TMF_CLEAR_ACA;
1738         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1739
1740         return rc;
1741 }
1742
1743 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1744 {
1745         struct sas_phy *local_phy = sas_get_local_phy(device);
1746         struct hisi_sas_device *sas_dev = device->lldd_dev;
1747         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1748         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1749         DECLARE_COMPLETION_ONSTACK(phyreset);
1750         int rc, reset_type;
1751
1752         if (!local_phy->enabled) {
1753                 sas_put_local_phy(local_phy);
1754                 return -ENODEV;
1755         }
1756
1757         if (scsi_is_sas_phy_local(local_phy)) {
1758                 struct asd_sas_phy *sas_phy =
1759                         sas_ha->sas_phy[local_phy->number];
1760                 struct hisi_sas_phy *phy =
1761                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1762                 phy->in_reset = 1;
1763                 phy->reset_completion = &phyreset;
1764         }
1765
1766         reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1767                       !dev_is_sata(device)) ? true : false;
1768
1769         rc = sas_phy_reset(local_phy, reset_type);
1770         sas_put_local_phy(local_phy);
1771
1772         if (scsi_is_sas_phy_local(local_phy)) {
1773                 struct asd_sas_phy *sas_phy =
1774                         sas_ha->sas_phy[local_phy->number];
1775                 struct hisi_sas_phy *phy =
1776                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1777                 int ret = wait_for_completion_timeout(&phyreset, 2 * HZ);
1778                 unsigned long flags;
1779
1780                 spin_lock_irqsave(&phy->lock, flags);
1781                 phy->reset_completion = NULL;
1782                 phy->in_reset = 0;
1783                 spin_unlock_irqrestore(&phy->lock, flags);
1784
1785                 /* report PHY down if timed out */
1786                 if (!ret)
1787                         hisi_sas_phy_down(hisi_hba, sas_phy->id, 0);
1788         } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) {
1789                 /*
1790                  * If in init state, we rely on caller to wait for link to be
1791                  * ready; otherwise, except phy reset is fail, delay.
1792                  */
1793                 if (!rc)
1794                         msleep(2000);
1795         }
1796
1797         return rc;
1798 }
1799
1800 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1801 {
1802         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1803         struct device *dev = hisi_hba->dev;
1804         int rc;
1805
1806         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1807                                           HISI_SAS_INT_ABT_DEV, 0);
1808         if (rc < 0) {
1809                 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1810                 return TMF_RESP_FUNC_FAILED;
1811         }
1812         hisi_sas_dereg_device(hisi_hba, device);
1813
1814         if (dev_is_sata(device)) {
1815                 rc = hisi_sas_softreset_ata_disk(device);
1816                 if (rc == TMF_RESP_FUNC_FAILED)
1817                         return TMF_RESP_FUNC_FAILED;
1818         }
1819
1820         rc = hisi_sas_debug_I_T_nexus_reset(device);
1821
1822         if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1823                 hisi_sas_release_task(hisi_hba, device);
1824
1825         return rc;
1826 }
1827
1828 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1829 {
1830         struct hisi_sas_device *sas_dev = device->lldd_dev;
1831         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1832         struct device *dev = hisi_hba->dev;
1833         int rc = TMF_RESP_FUNC_FAILED;
1834
1835         /* Clear internal IO and then lu reset */
1836         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1837                                           HISI_SAS_INT_ABT_DEV, 0);
1838         if (rc < 0) {
1839                 dev_err(dev, "lu_reset: internal abort failed\n");
1840                 goto out;
1841         }
1842         hisi_sas_dereg_device(hisi_hba, device);
1843
1844         if (dev_is_sata(device)) {
1845                 struct sas_phy *phy;
1846
1847                 phy = sas_get_local_phy(device);
1848
1849                 rc = sas_phy_reset(phy, true);
1850
1851                 if (rc == 0)
1852                         hisi_sas_release_task(hisi_hba, device);
1853                 sas_put_local_phy(phy);
1854         } else {
1855                 struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };
1856
1857                 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1858                 if (rc == TMF_RESP_FUNC_COMPLETE)
1859                         hisi_sas_release_task(hisi_hba, device);
1860         }
1861 out:
1862         if (rc != TMF_RESP_FUNC_COMPLETE)
1863                 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1864                              sas_dev->device_id, rc);
1865         return rc;
1866 }
1867
1868 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1869 {
1870         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1871         struct device *dev = hisi_hba->dev;
1872         HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1873         int rc, i;
1874
1875         queue_work(hisi_hba->wq, &r.work);
1876         wait_for_completion(r.completion);
1877         if (!r.done)
1878                 return TMF_RESP_FUNC_FAILED;
1879
1880         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1881                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1882                 struct domain_device *device = sas_dev->sas_device;
1883
1884                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1885                     dev_is_expander(device->dev_type))
1886                         continue;
1887
1888                 rc = hisi_sas_debug_I_T_nexus_reset(device);
1889                 if (rc != TMF_RESP_FUNC_COMPLETE)
1890                         dev_info(dev, "clear nexus ha: for device[%d] rc=%d\n",
1891                                  sas_dev->device_id, rc);
1892         }
1893
1894         hisi_sas_release_tasks(hisi_hba);
1895
1896         return TMF_RESP_FUNC_COMPLETE;
1897 }
1898
1899 static int hisi_sas_query_task(struct sas_task *task)
1900 {
1901         struct scsi_lun lun;
1902         struct hisi_sas_tmf_task tmf_task;
1903         int rc = TMF_RESP_FUNC_FAILED;
1904
1905         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1906                 struct scsi_cmnd *cmnd = task->uldd_task;
1907                 struct domain_device *device = task->dev;
1908                 struct hisi_sas_slot *slot = task->lldd_task;
1909                 u32 tag = slot->idx;
1910
1911                 int_to_scsilun(cmnd->device->lun, &lun);
1912                 tmf_task.tmf = TMF_QUERY_TASK;
1913                 tmf_task.tag_of_task_to_be_managed = tag;
1914
1915                 rc = hisi_sas_debug_issue_ssp_tmf(device,
1916                                                   lun.scsi_lun,
1917                                                   &tmf_task);
1918                 switch (rc) {
1919                 /* The task is still in Lun, release it then */
1920                 case TMF_RESP_FUNC_SUCC:
1921                 /* The task is not in Lun or failed, reset the phy */
1922                 case TMF_RESP_FUNC_FAILED:
1923                 case TMF_RESP_FUNC_COMPLETE:
1924                         break;
1925                 default:
1926                         rc = TMF_RESP_FUNC_FAILED;
1927                         break;
1928                 }
1929         }
1930         return rc;
1931 }
1932
1933 static int
1934 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1935                                   struct sas_task *task, int abort_flag,
1936                                   int task_tag, struct hisi_sas_dq *dq)
1937 {
1938         struct domain_device *device = task->dev;
1939         struct hisi_sas_device *sas_dev = device->lldd_dev;
1940         struct device *dev = hisi_hba->dev;
1941         struct hisi_sas_port *port;
1942         struct hisi_sas_slot *slot;
1943         struct asd_sas_port *sas_port = device->port;
1944         struct hisi_sas_cmd_hdr *cmd_hdr_base;
1945         int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1946         unsigned long flags;
1947         int wr_q_index;
1948
1949         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1950                 return -EINVAL;
1951
1952         if (!device->port)
1953                 return -1;
1954
1955         port = to_hisi_sas_port(sas_port);
1956
1957         /* simply get a slot and send abort command */
1958         rc = hisi_sas_slot_index_alloc(hisi_hba, NULL);
1959         if (rc < 0)
1960                 goto err_out;
1961
1962         slot_idx = rc;
1963         slot = &hisi_hba->slot_info[slot_idx];
1964
1965         spin_lock(&dq->lock);
1966         wr_q_index = dq->wr_point;
1967         dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
1968         list_add_tail(&slot->delivery, &dq->list);
1969         spin_unlock(&dq->lock);
1970         spin_lock(&sas_dev->lock);
1971         list_add_tail(&slot->entry, &sas_dev->list);
1972         spin_unlock(&sas_dev->lock);
1973
1974         dlvry_queue = dq->id;
1975         dlvry_queue_slot = wr_q_index;
1976
1977         slot->device_id = sas_dev->device_id;
1978         slot->n_elem = n_elem;
1979         slot->dlvry_queue = dlvry_queue;
1980         slot->dlvry_queue_slot = dlvry_queue_slot;
1981         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1982         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1983         slot->task = task;
1984         slot->port = port;
1985         slot->is_internal = true;
1986         task->lldd_task = slot;
1987
1988         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1989         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1990         memset(hisi_sas_status_buf_addr_mem(slot), 0,
1991                sizeof(struct hisi_sas_err_record));
1992
1993         hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1994                                       abort_flag, task_tag);
1995
1996         spin_lock_irqsave(&task->task_state_lock, flags);
1997         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1998         spin_unlock_irqrestore(&task->task_state_lock, flags);
1999         WRITE_ONCE(slot->ready, 1);
2000         /* send abort command to the chip */
2001         spin_lock(&dq->lock);
2002         hisi_hba->hw->start_delivery(dq);
2003         spin_unlock(&dq->lock);
2004
2005         return 0;
2006
2007 err_out:
2008         dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
2009
2010         return rc;
2011 }
2012
2013 /**
2014  * _hisi_sas_internal_task_abort -- execute an internal
2015  * abort command for single IO command or a device
2016  * @hisi_hba: host controller struct
2017  * @device: domain device
2018  * @abort_flag: mode of operation, device or single IO
2019  * @tag: tag of IO to be aborted (only relevant to single
2020  *       IO mode)
2021  * @dq: delivery queue for this internal abort command
2022  */
2023 static int
2024 _hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2025                               struct domain_device *device, int abort_flag,
2026                               int tag, struct hisi_sas_dq *dq)
2027 {
2028         struct sas_task *task;
2029         struct hisi_sas_device *sas_dev = device->lldd_dev;
2030         struct device *dev = hisi_hba->dev;
2031         int res;
2032
2033         /*
2034          * The interface is not realized means this HW don't support internal
2035          * abort, or don't need to do internal abort. Then here, we return
2036          * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
2037          * the internal abort has been executed and returned CQ.
2038          */
2039         if (!hisi_hba->hw->prep_abort)
2040                 return TMF_RESP_FUNC_FAILED;
2041
2042         task = sas_alloc_slow_task(GFP_KERNEL);
2043         if (!task)
2044                 return -ENOMEM;
2045
2046         task->dev = device;
2047         task->task_proto = device->tproto;
2048         task->task_done = hisi_sas_task_done;
2049         task->slow_task->timer.function = hisi_sas_tmf_timedout;
2050         task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT * HZ;
2051         add_timer(&task->slow_task->timer);
2052
2053         res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
2054                                                 task, abort_flag, tag, dq);
2055         if (res) {
2056                 del_timer(&task->slow_task->timer);
2057                 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
2058                         res);
2059                 goto exit;
2060         }
2061         wait_for_completion(&task->slow_task->completion);
2062         res = TMF_RESP_FUNC_FAILED;
2063
2064         /* Internal abort timed out */
2065         if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
2066                 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
2067                         queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
2068
2069                 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
2070                         struct hisi_sas_slot *slot = task->lldd_task;
2071
2072                         if (slot) {
2073                                 struct hisi_sas_cq *cq =
2074                                         &hisi_hba->cq[slot->dlvry_queue];
2075                                 /*
2076                                  * sync irq to avoid free'ing task
2077                                  * before using task in IO completion
2078                                  */
2079                                 synchronize_irq(cq->irq_no);
2080                                 slot->task = NULL;
2081                         }
2082                         dev_err(dev, "internal task abort: timeout and not done.\n");
2083
2084                         res = -EIO;
2085                         goto exit;
2086                 } else
2087                         dev_err(dev, "internal task abort: timeout.\n");
2088         }
2089
2090         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2091                 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
2092                 res = TMF_RESP_FUNC_COMPLETE;
2093                 goto exit;
2094         }
2095
2096         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2097                 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
2098                 res = TMF_RESP_FUNC_SUCC;
2099                 goto exit;
2100         }
2101
2102 exit:
2103         dev_dbg(dev, "internal task abort: task to dev %016llx task=%pK resp: 0x%x sts 0x%x\n",
2104                 SAS_ADDR(device->sas_addr), task,
2105                 task->task_status.resp, /* 0 is complete, -1 is undelivered */
2106                 task->task_status.stat);
2107         sas_free_task(task);
2108
2109         return res;
2110 }
2111
2112 static int
2113 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2114                              struct domain_device *device,
2115                              int abort_flag, int tag)
2116 {
2117         struct hisi_sas_slot *slot;
2118         struct device *dev = hisi_hba->dev;
2119         struct hisi_sas_dq *dq;
2120         int i, rc;
2121
2122         switch (abort_flag) {
2123         case HISI_SAS_INT_ABT_CMD:
2124                 slot = &hisi_hba->slot_info[tag];
2125                 dq = &hisi_hba->dq[slot->dlvry_queue];
2126                 return _hisi_sas_internal_task_abort(hisi_hba, device,
2127                                                      abort_flag, tag, dq);
2128         case HISI_SAS_INT_ABT_DEV:
2129                 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2130                         struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2131                         const struct cpumask *mask = cq->irq_mask;
2132
2133                         if (mask && !cpumask_intersects(cpu_online_mask, mask))
2134                                 continue;
2135                         dq = &hisi_hba->dq[i];
2136                         rc = _hisi_sas_internal_task_abort(hisi_hba, device,
2137                                                            abort_flag, tag,
2138                                                            dq);
2139                         if (rc)
2140                                 return rc;
2141                 }
2142                 break;
2143         default:
2144                 dev_err(dev, "Unrecognised internal abort flag (%d)\n",
2145                         abort_flag);
2146                 return -EINVAL;
2147         }
2148
2149         return 0;
2150 }
2151
2152 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2153 {
2154         hisi_sas_port_notify_formed(sas_phy);
2155 }
2156
2157 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2158                         u8 reg_index, u8 reg_count, u8 *write_data)
2159 {
2160         struct hisi_hba *hisi_hba = sha->lldd_ha;
2161
2162         if (!hisi_hba->hw->write_gpio)
2163                 return -EOPNOTSUPP;
2164
2165         return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2166                                 reg_index, reg_count, write_data);
2167 }
2168
2169 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2170 {
2171         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2172         struct sas_phy *sphy = sas_phy->phy;
2173         unsigned long flags;
2174
2175         phy->phy_attached = 0;
2176         phy->phy_type = 0;
2177         phy->port = NULL;
2178
2179         spin_lock_irqsave(&phy->lock, flags);
2180         if (phy->enable)
2181                 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2182         else
2183                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2184         spin_unlock_irqrestore(&phy->lock, flags);
2185 }
2186
2187 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
2188 {
2189         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2190         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2191         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
2192         struct device *dev = hisi_hba->dev;
2193
2194         if (rdy) {
2195                 /* Phy down but ready */
2196                 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
2197                 hisi_sas_port_notify_formed(sas_phy);
2198         } else {
2199                 struct hisi_sas_port *port  = phy->port;
2200
2201                 if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
2202                     phy->in_reset) {
2203                         dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2204                         return;
2205                 }
2206                 /* Phy down and not ready */
2207                 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
2208                 sas_phy_disconnected(sas_phy);
2209
2210                 if (port) {
2211                         if (phy->phy_type & PORT_TYPE_SAS) {
2212                                 int port_id = port->id;
2213
2214                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2215                                                                        port_id))
2216                                         port->port_attached = 0;
2217                         } else if (phy->phy_type & PORT_TYPE_SATA)
2218                                 port->port_attached = 0;
2219                 }
2220                 hisi_sas_phy_disconnected(phy);
2221         }
2222 }
2223 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2224
2225 void hisi_sas_sync_irqs(struct hisi_hba *hisi_hba)
2226 {
2227         int i;
2228
2229         for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2230                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2231
2232                 synchronize_irq(cq->irq_no);
2233         }
2234 }
2235 EXPORT_SYMBOL_GPL(hisi_sas_sync_irqs);
2236
2237 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2238 {
2239         struct hisi_hba *hisi_hba = shost_priv(shost);
2240
2241         if (reset_type != SCSI_ADAPTER_RESET)
2242                 return -EOPNOTSUPP;
2243
2244         queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2245
2246         return 0;
2247 }
2248 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2249
2250 struct scsi_transport_template *hisi_sas_stt;
2251 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2252
2253 static struct sas_domain_function_template hisi_sas_transport_ops = {
2254         .lldd_dev_found         = hisi_sas_dev_found,
2255         .lldd_dev_gone          = hisi_sas_dev_gone,
2256         .lldd_execute_task      = hisi_sas_queue_command,
2257         .lldd_control_phy       = hisi_sas_control_phy,
2258         .lldd_abort_task        = hisi_sas_abort_task,
2259         .lldd_abort_task_set    = hisi_sas_abort_task_set,
2260         .lldd_clear_aca         = hisi_sas_clear_aca,
2261         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
2262         .lldd_lu_reset          = hisi_sas_lu_reset,
2263         .lldd_query_task        = hisi_sas_query_task,
2264         .lldd_clear_nexus_ha    = hisi_sas_clear_nexus_ha,
2265         .lldd_port_formed       = hisi_sas_port_formed,
2266         .lldd_write_gpio        = hisi_sas_write_gpio,
2267 };
2268
2269 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2270 {
2271         int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2272         struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2273
2274         for (i = 0; i < hisi_hba->queue_count; i++) {
2275                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2276                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2277                 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2278
2279                 s = sizeof(struct hisi_sas_cmd_hdr);
2280                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2281                         memset(&cmd_hdr[j], 0, s);
2282
2283                 dq->wr_point = 0;
2284
2285                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2286                 memset(hisi_hba->complete_hdr[i], 0, s);
2287                 cq->rd_point = 0;
2288         }
2289
2290         s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2291         memset(hisi_hba->initial_fis, 0, s);
2292
2293         s = max_command_entries * sizeof(struct hisi_sas_iost);
2294         memset(hisi_hba->iost, 0, s);
2295
2296         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2297         memset(hisi_hba->breakpoint, 0, s);
2298
2299         s = sizeof(struct hisi_sas_sata_breakpoint);
2300         for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2301                 memset(&sata_breakpoint[j], 0, s);
2302 }
2303 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2304
2305 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2306 {
2307         struct device *dev = hisi_hba->dev;
2308         int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2309         int max_command_entries_ru, sz_slot_buf_ru;
2310         int blk_cnt, slots_per_blk;
2311
2312         sema_init(&hisi_hba->sem, 1);
2313         spin_lock_init(&hisi_hba->lock);
2314         for (i = 0; i < hisi_hba->n_phy; i++) {
2315                 hisi_sas_phy_init(hisi_hba, i);
2316                 hisi_hba->port[i].port_attached = 0;
2317                 hisi_hba->port[i].id = -1;
2318         }
2319
2320         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2321                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2322                 hisi_hba->devices[i].device_id = i;
2323                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2324         }
2325
2326         for (i = 0; i < hisi_hba->queue_count; i++) {
2327                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2328                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2329
2330                 /* Completion queue structure */
2331                 cq->id = i;
2332                 cq->hisi_hba = hisi_hba;
2333
2334                 /* Delivery queue structure */
2335                 spin_lock_init(&dq->lock);
2336                 INIT_LIST_HEAD(&dq->list);
2337                 dq->id = i;
2338                 dq->hisi_hba = hisi_hba;
2339
2340                 /* Delivery queue */
2341                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2342                 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2343                                                 &hisi_hba->cmd_hdr_dma[i],
2344                                                 GFP_KERNEL);
2345                 if (!hisi_hba->cmd_hdr[i])
2346                         goto err_out;
2347
2348                 /* Completion queue */
2349                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2350                 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2351                                                 &hisi_hba->complete_hdr_dma[i],
2352                                                 GFP_KERNEL);
2353                 if (!hisi_hba->complete_hdr[i])
2354                         goto err_out;
2355         }
2356
2357         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2358         hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2359                                              GFP_KERNEL);
2360         if (!hisi_hba->itct)
2361                 goto err_out;
2362
2363         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2364                                            sizeof(struct hisi_sas_slot),
2365                                            GFP_KERNEL);
2366         if (!hisi_hba->slot_info)
2367                 goto err_out;
2368
2369         /* roundup to avoid overly large block size */
2370         max_command_entries_ru = roundup(max_command_entries, 64);
2371         if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2372                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2373         else
2374                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2375         sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2376         s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2377         blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2378         slots_per_blk = s / sz_slot_buf_ru;
2379
2380         for (i = 0; i < blk_cnt; i++) {
2381                 int slot_index = i * slots_per_blk;
2382                 dma_addr_t buf_dma;
2383                 void *buf;
2384
2385                 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2386                                           GFP_KERNEL);
2387                 if (!buf)
2388                         goto err_out;
2389
2390                 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2391                         struct hisi_sas_slot *slot;
2392
2393                         slot = &hisi_hba->slot_info[slot_index];
2394                         slot->buf = buf;
2395                         slot->buf_dma = buf_dma;
2396                         slot->idx = slot_index;
2397
2398                         buf += sz_slot_buf_ru;
2399                         buf_dma += sz_slot_buf_ru;
2400                 }
2401         }
2402
2403         s = max_command_entries * sizeof(struct hisi_sas_iost);
2404         hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2405                                              GFP_KERNEL);
2406         if (!hisi_hba->iost)
2407                 goto err_out;
2408
2409         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2410         hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2411                                                    &hisi_hba->breakpoint_dma,
2412                                                    GFP_KERNEL);
2413         if (!hisi_hba->breakpoint)
2414                 goto err_out;
2415
2416         hisi_hba->slot_index_count = max_command_entries;
2417         s = hisi_hba->slot_index_count / BITS_PER_BYTE;
2418         hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
2419         if (!hisi_hba->slot_index_tags)
2420                 goto err_out;
2421
2422         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2423         hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2424                                                     &hisi_hba->initial_fis_dma,
2425                                                     GFP_KERNEL);
2426         if (!hisi_hba->initial_fis)
2427                 goto err_out;
2428
2429         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2430         hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2431                                         &hisi_hba->sata_breakpoint_dma,
2432                                         GFP_KERNEL);
2433         if (!hisi_hba->sata_breakpoint)
2434                 goto err_out;
2435
2436         hisi_sas_slot_index_init(hisi_hba);
2437         hisi_hba->last_slot_index = HISI_SAS_UNRESERVED_IPTT;
2438
2439         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2440         if (!hisi_hba->wq) {
2441                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2442                 goto err_out;
2443         }
2444
2445         return 0;
2446 err_out:
2447         return -ENOMEM;
2448 }
2449 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2450
2451 void hisi_sas_free(struct hisi_hba *hisi_hba)
2452 {
2453         int i;
2454
2455         for (i = 0; i < hisi_hba->n_phy; i++) {
2456                 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2457
2458                 del_timer_sync(&phy->timer);
2459         }
2460
2461         if (hisi_hba->wq)
2462                 destroy_workqueue(hisi_hba->wq);
2463 }
2464 EXPORT_SYMBOL_GPL(hisi_sas_free);
2465
2466 void hisi_sas_rst_work_handler(struct work_struct *work)
2467 {
2468         struct hisi_hba *hisi_hba =
2469                 container_of(work, struct hisi_hba, rst_work);
2470
2471         hisi_sas_controller_reset(hisi_hba);
2472 }
2473 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2474
2475 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2476 {
2477         struct hisi_sas_rst *rst =
2478                 container_of(work, struct hisi_sas_rst, work);
2479
2480         if (!hisi_sas_controller_reset(rst->hisi_hba))
2481                 rst->done = true;
2482         complete(rst->completion);
2483 }
2484 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2485
2486 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2487 {
2488         struct device *dev = hisi_hba->dev;
2489         struct platform_device *pdev = hisi_hba->platform_dev;
2490         struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2491         struct clk *refclk;
2492
2493         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2494                                           SAS_ADDR_SIZE)) {
2495                 dev_err(dev, "could not get property sas-addr\n");
2496                 return -ENOENT;
2497         }
2498
2499         if (np) {
2500                 /*
2501                  * These properties are only required for platform device-based
2502                  * controller with DT firmware.
2503                  */
2504                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2505                                         "hisilicon,sas-syscon");
2506                 if (IS_ERR(hisi_hba->ctrl)) {
2507                         dev_err(dev, "could not get syscon\n");
2508                         return -ENOENT;
2509                 }
2510
2511                 if (device_property_read_u32(dev, "ctrl-reset-reg",
2512                                              &hisi_hba->ctrl_reset_reg)) {
2513                         dev_err(dev, "could not get property ctrl-reset-reg\n");
2514                         return -ENOENT;
2515                 }
2516
2517                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2518                                              &hisi_hba->ctrl_reset_sts_reg)) {
2519                         dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2520                         return -ENOENT;
2521                 }
2522
2523                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2524                                              &hisi_hba->ctrl_clock_ena_reg)) {
2525                         dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2526                         return -ENOENT;
2527                 }
2528         }
2529
2530         refclk = devm_clk_get(dev, NULL);
2531         if (IS_ERR(refclk))
2532                 dev_dbg(dev, "no ref clk property\n");
2533         else
2534                 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2535
2536         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2537                 dev_err(dev, "could not get property phy-count\n");
2538                 return -ENOENT;
2539         }
2540
2541         if (device_property_read_u32(dev, "queue-count",
2542                                      &hisi_hba->queue_count)) {
2543                 dev_err(dev, "could not get property queue-count\n");
2544                 return -ENOENT;
2545         }
2546
2547         return 0;
2548 }
2549 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2550
2551 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2552                                               const struct hisi_sas_hw *hw)
2553 {
2554         struct resource *res;
2555         struct Scsi_Host *shost;
2556         struct hisi_hba *hisi_hba;
2557         struct device *dev = &pdev->dev;
2558         int error;
2559
2560         shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2561         if (!shost) {
2562                 dev_err(dev, "scsi host alloc failed\n");
2563                 return NULL;
2564         }
2565         hisi_hba = shost_priv(shost);
2566
2567         INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2568         hisi_hba->hw = hw;
2569         hisi_hba->dev = dev;
2570         hisi_hba->platform_dev = pdev;
2571         hisi_hba->shost = shost;
2572         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2573
2574         timer_setup(&hisi_hba->timer, NULL, 0);
2575
2576         if (hisi_sas_get_fw_info(hisi_hba) < 0)
2577                 goto err_out;
2578
2579         error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2580         if (error)
2581                 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
2582
2583         if (error) {
2584                 dev_err(dev, "No usable DMA addressing method\n");
2585                 goto err_out;
2586         }
2587
2588         hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2589         if (IS_ERR(hisi_hba->regs))
2590                 goto err_out;
2591
2592         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2593         if (res) {
2594                 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2595                 if (IS_ERR(hisi_hba->sgpio_regs))
2596                         goto err_out;
2597         }
2598
2599         if (hisi_sas_alloc(hisi_hba)) {
2600                 hisi_sas_free(hisi_hba);
2601                 goto err_out;
2602         }
2603
2604         return shost;
2605 err_out:
2606         scsi_host_put(shost);
2607         dev_err(dev, "shost alloc failed\n");
2608         return NULL;
2609 }
2610
2611 int hisi_sas_probe(struct platform_device *pdev,
2612                    const struct hisi_sas_hw *hw)
2613 {
2614         struct Scsi_Host *shost;
2615         struct hisi_hba *hisi_hba;
2616         struct device *dev = &pdev->dev;
2617         struct asd_sas_phy **arr_phy;
2618         struct asd_sas_port **arr_port;
2619         struct sas_ha_struct *sha;
2620         int rc, phy_nr, port_nr, i;
2621
2622         shost = hisi_sas_shost_alloc(pdev, hw);
2623         if (!shost)
2624                 return -ENOMEM;
2625
2626         sha = SHOST_TO_SAS_HA(shost);
2627         hisi_hba = shost_priv(shost);
2628         platform_set_drvdata(pdev, sha);
2629
2630         phy_nr = port_nr = hisi_hba->n_phy;
2631
2632         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2633         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2634         if (!arr_phy || !arr_port) {
2635                 rc = -ENOMEM;
2636                 goto err_out_ha;
2637         }
2638
2639         sha->sas_phy = arr_phy;
2640         sha->sas_port = arr_port;
2641         sha->lldd_ha = hisi_hba;
2642
2643         shost->transportt = hisi_sas_stt;
2644         shost->max_id = HISI_SAS_MAX_DEVICES;
2645         shost->max_lun = ~0;
2646         shost->max_channel = 1;
2647         shost->max_cmd_len = 16;
2648         if (hisi_hba->hw->slot_index_alloc) {
2649                 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2650                 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2651         } else {
2652                 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2653                 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2654         }
2655
2656         sha->sas_ha_name = DRV_NAME;
2657         sha->dev = hisi_hba->dev;
2658         sha->lldd_module = THIS_MODULE;
2659         sha->sas_addr = &hisi_hba->sas_addr[0];
2660         sha->num_phys = hisi_hba->n_phy;
2661         sha->core.shost = hisi_hba->shost;
2662
2663         for (i = 0; i < hisi_hba->n_phy; i++) {
2664                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2665                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2666         }
2667
2668         rc = scsi_add_host(shost, &pdev->dev);
2669         if (rc)
2670                 goto err_out_ha;
2671
2672         rc = sas_register_ha(sha);
2673         if (rc)
2674                 goto err_out_register_ha;
2675
2676         rc = hisi_hba->hw->hw_init(hisi_hba);
2677         if (rc)
2678                 goto err_out_register_ha;
2679
2680         scsi_scan_host(shost);
2681
2682         return 0;
2683
2684 err_out_register_ha:
2685         scsi_remove_host(shost);
2686 err_out_ha:
2687         hisi_sas_debugfs_exit(hisi_hba);
2688         hisi_sas_free(hisi_hba);
2689         scsi_host_put(shost);
2690         return rc;
2691 }
2692 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2693
2694 struct dentry *hisi_sas_debugfs_dir;
2695
2696 static void hisi_sas_debugfs_snapshot_cq_reg(struct hisi_hba *hisi_hba)
2697 {
2698         int queue_entry_size = hisi_hba->hw->complete_hdr_size;
2699         int dump_index = hisi_hba->debugfs_dump_index;
2700         int i;
2701
2702         for (i = 0; i < hisi_hba->queue_count; i++)
2703                 memcpy(hisi_hba->debugfs_cq[dump_index][i].complete_hdr,
2704                        hisi_hba->complete_hdr[i],
2705                        HISI_SAS_QUEUE_SLOTS * queue_entry_size);
2706 }
2707
2708 static void hisi_sas_debugfs_snapshot_dq_reg(struct hisi_hba *hisi_hba)
2709 {
2710         int queue_entry_size = sizeof(struct hisi_sas_cmd_hdr);
2711         int dump_index = hisi_hba->debugfs_dump_index;
2712         int i;
2713
2714         for (i = 0; i < hisi_hba->queue_count; i++) {
2715                 struct hisi_sas_cmd_hdr *debugfs_cmd_hdr, *cmd_hdr;
2716                 int j;
2717
2718                 debugfs_cmd_hdr = hisi_hba->debugfs_dq[dump_index][i].hdr;
2719                 cmd_hdr = hisi_hba->cmd_hdr[i];
2720
2721                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2722                         memcpy(&debugfs_cmd_hdr[j], &cmd_hdr[j],
2723                                queue_entry_size);
2724         }
2725 }
2726
2727 static void hisi_sas_debugfs_snapshot_port_reg(struct hisi_hba *hisi_hba)
2728 {
2729         int dump_index = hisi_hba->debugfs_dump_index;
2730         const struct hisi_sas_debugfs_reg *port =
2731                 hisi_hba->hw->debugfs_reg_port;
2732         int i, phy_cnt;
2733         u32 offset;
2734         u32 *databuf;
2735
2736         for (phy_cnt = 0; phy_cnt < hisi_hba->n_phy; phy_cnt++) {
2737                 databuf = hisi_hba->debugfs_port_reg[dump_index][phy_cnt].data;
2738                 for (i = 0; i < port->count; i++, databuf++) {
2739                         offset = port->base_off + 4 * i;
2740                         *databuf = port->read_port_reg(hisi_hba, phy_cnt,
2741                                                        offset);
2742                 }
2743         }
2744 }
2745
2746 static void hisi_sas_debugfs_snapshot_global_reg(struct hisi_hba *hisi_hba)
2747 {
2748         int dump_index = hisi_hba->debugfs_dump_index;
2749         u32 *databuf = hisi_hba->debugfs_regs[dump_index][DEBUGFS_GLOBAL].data;
2750         const struct hisi_sas_hw *hw = hisi_hba->hw;
2751         const struct hisi_sas_debugfs_reg *global =
2752                         hw->debugfs_reg_array[DEBUGFS_GLOBAL];
2753         int i;
2754
2755         for (i = 0; i < global->count; i++, databuf++)
2756                 *databuf = global->read_global_reg(hisi_hba, 4 * i);
2757 }
2758
2759 static void hisi_sas_debugfs_snapshot_axi_reg(struct hisi_hba *hisi_hba)
2760 {
2761         int dump_index = hisi_hba->debugfs_dump_index;
2762         u32 *databuf = hisi_hba->debugfs_regs[dump_index][DEBUGFS_AXI].data;
2763         const struct hisi_sas_hw *hw = hisi_hba->hw;
2764         const struct hisi_sas_debugfs_reg *axi =
2765                         hw->debugfs_reg_array[DEBUGFS_AXI];
2766         int i;
2767
2768         for (i = 0; i < axi->count; i++, databuf++)
2769                 *databuf = axi->read_global_reg(hisi_hba,
2770                                                 4 * i + axi->base_off);
2771 }
2772
2773 static void hisi_sas_debugfs_snapshot_ras_reg(struct hisi_hba *hisi_hba)
2774 {
2775         int dump_index = hisi_hba->debugfs_dump_index;
2776         u32 *databuf = hisi_hba->debugfs_regs[dump_index][DEBUGFS_RAS].data;
2777         const struct hisi_sas_hw *hw = hisi_hba->hw;
2778         const struct hisi_sas_debugfs_reg *ras =
2779                         hw->debugfs_reg_array[DEBUGFS_RAS];
2780         int i;
2781
2782         for (i = 0; i < ras->count; i++, databuf++)
2783                 *databuf = ras->read_global_reg(hisi_hba,
2784                                                 4 * i + ras->base_off);
2785 }
2786
2787 static void hisi_sas_debugfs_snapshot_itct_reg(struct hisi_hba *hisi_hba)
2788 {
2789         int dump_index = hisi_hba->debugfs_dump_index;
2790         void *cachebuf = hisi_hba->debugfs_itct_cache[dump_index].cache;
2791         void *databuf = hisi_hba->debugfs_itct[dump_index].itct;
2792         struct hisi_sas_itct *itct;
2793         int i;
2794
2795         hisi_hba->hw->read_iost_itct_cache(hisi_hba, HISI_SAS_ITCT_CACHE,
2796                                            cachebuf);
2797
2798         itct = hisi_hba->itct;
2799
2800         for (i = 0; i < HISI_SAS_MAX_ITCT_ENTRIES; i++, itct++) {
2801                 memcpy(databuf, itct, sizeof(struct hisi_sas_itct));
2802                 databuf += sizeof(struct hisi_sas_itct);
2803         }
2804 }
2805
2806 static void hisi_sas_debugfs_snapshot_iost_reg(struct hisi_hba *hisi_hba)
2807 {
2808         int dump_index = hisi_hba->debugfs_dump_index;
2809         int max_command_entries = HISI_SAS_MAX_COMMANDS;
2810         void *cachebuf = hisi_hba->debugfs_iost_cache[dump_index].cache;
2811         void *databuf = hisi_hba->debugfs_iost[dump_index].iost;
2812         struct hisi_sas_iost *iost;
2813         int i;
2814
2815         hisi_hba->hw->read_iost_itct_cache(hisi_hba, HISI_SAS_IOST_CACHE,
2816                                            cachebuf);
2817
2818         iost = hisi_hba->iost;
2819
2820         for (i = 0; i < max_command_entries; i++, iost++) {
2821                 memcpy(databuf, iost, sizeof(struct hisi_sas_iost));
2822                 databuf += sizeof(struct hisi_sas_iost);
2823         }
2824 }
2825
2826 static const char *
2827 hisi_sas_debugfs_to_reg_name(int off, int base_off,
2828                              const struct hisi_sas_debugfs_reg_lu *lu)
2829 {
2830         for (; lu->name; lu++) {
2831                 if (off == lu->off - base_off)
2832                         return lu->name;
2833         }
2834
2835         return NULL;
2836 }
2837
2838 static void hisi_sas_debugfs_print_reg(u32 *regs_val, const void *ptr,
2839                                        struct seq_file *s)
2840 {
2841         const struct hisi_sas_debugfs_reg *reg = ptr;
2842         int i;
2843
2844         for (i = 0; i < reg->count; i++) {
2845                 int off = i * 4;
2846                 const char *name;
2847
2848                 name = hisi_sas_debugfs_to_reg_name(off, reg->base_off,
2849                                                     reg->lu);
2850
2851                 if (name)
2852                         seq_printf(s, "0x%08x 0x%08x %s\n", off,
2853                                    regs_val[i], name);
2854                 else
2855                         seq_printf(s, "0x%08x 0x%08x\n", off,
2856                                    regs_val[i]);
2857         }
2858 }
2859
2860 static int hisi_sas_debugfs_global_show(struct seq_file *s, void *p)
2861 {
2862         struct hisi_sas_debugfs_regs *global = s->private;
2863         struct hisi_hba *hisi_hba = global->hisi_hba;
2864         const struct hisi_sas_hw *hw = hisi_hba->hw;
2865         const void *reg_global = hw->debugfs_reg_array[DEBUGFS_GLOBAL];
2866
2867         hisi_sas_debugfs_print_reg(global->data,
2868                                    reg_global, s);
2869
2870         return 0;
2871 }
2872
2873 static int hisi_sas_debugfs_global_open(struct inode *inode, struct file *filp)
2874 {
2875         return single_open(filp, hisi_sas_debugfs_global_show,
2876                            inode->i_private);
2877 }
2878
2879 static const struct file_operations hisi_sas_debugfs_global_fops = {
2880         .open = hisi_sas_debugfs_global_open,
2881         .read = seq_read,
2882         .llseek = seq_lseek,
2883         .release = single_release,
2884         .owner = THIS_MODULE,
2885 };
2886
2887 static int hisi_sas_debugfs_axi_show(struct seq_file *s, void *p)
2888 {
2889         struct hisi_sas_debugfs_regs *axi = s->private;
2890         struct hisi_hba *hisi_hba = axi->hisi_hba;
2891         const struct hisi_sas_hw *hw = hisi_hba->hw;
2892         const void *reg_axi = hw->debugfs_reg_array[DEBUGFS_AXI];
2893
2894         hisi_sas_debugfs_print_reg(axi->data,
2895                                    reg_axi, s);
2896
2897         return 0;
2898 }
2899
2900 static int hisi_sas_debugfs_axi_open(struct inode *inode, struct file *filp)
2901 {
2902         return single_open(filp, hisi_sas_debugfs_axi_show,
2903                            inode->i_private);
2904 }
2905
2906 static const struct file_operations hisi_sas_debugfs_axi_fops = {
2907         .open = hisi_sas_debugfs_axi_open,
2908         .read = seq_read,
2909         .llseek = seq_lseek,
2910         .release = single_release,
2911         .owner = THIS_MODULE,
2912 };
2913
2914 static int hisi_sas_debugfs_ras_show(struct seq_file *s, void *p)
2915 {
2916         struct hisi_sas_debugfs_regs *ras = s->private;
2917         struct hisi_hba *hisi_hba = ras->hisi_hba;
2918         const struct hisi_sas_hw *hw = hisi_hba->hw;
2919         const void *reg_ras = hw->debugfs_reg_array[DEBUGFS_RAS];
2920
2921         hisi_sas_debugfs_print_reg(ras->data,
2922                                    reg_ras, s);
2923
2924         return 0;
2925 }
2926
2927 static int hisi_sas_debugfs_ras_open(struct inode *inode, struct file *filp)
2928 {
2929         return single_open(filp, hisi_sas_debugfs_ras_show,
2930                            inode->i_private);
2931 }
2932
2933 static const struct file_operations hisi_sas_debugfs_ras_fops = {
2934         .open = hisi_sas_debugfs_ras_open,
2935         .read = seq_read,
2936         .llseek = seq_lseek,
2937         .release = single_release,
2938         .owner = THIS_MODULE,
2939 };
2940
2941 static int hisi_sas_debugfs_port_show(struct seq_file *s, void *p)
2942 {
2943         struct hisi_sas_debugfs_port *port = s->private;
2944         struct hisi_sas_phy *phy = port->phy;
2945         struct hisi_hba *hisi_hba = phy->hisi_hba;
2946         const struct hisi_sas_hw *hw = hisi_hba->hw;
2947         const struct hisi_sas_debugfs_reg *reg_port = hw->debugfs_reg_port;
2948
2949         hisi_sas_debugfs_print_reg(port->data, reg_port, s);
2950
2951         return 0;
2952 }
2953
2954 static int hisi_sas_debugfs_port_open(struct inode *inode, struct file *filp)
2955 {
2956         return single_open(filp, hisi_sas_debugfs_port_show, inode->i_private);
2957 }
2958
2959 static const struct file_operations hisi_sas_debugfs_port_fops = {
2960         .open = hisi_sas_debugfs_port_open,
2961         .read = seq_read,
2962         .llseek = seq_lseek,
2963         .release = single_release,
2964         .owner = THIS_MODULE,
2965 };
2966
2967 static void hisi_sas_show_row_64(struct seq_file *s, int index,
2968                                  int sz, __le64 *ptr)
2969 {
2970         int i;
2971
2972         /* completion header size not fixed per HW version */
2973         seq_printf(s, "index %04d:\n\t", index);
2974         for (i = 1; i <= sz / 8; i++, ptr++) {
2975                 seq_printf(s, " 0x%016llx", le64_to_cpu(*ptr));
2976                 if (!(i % 2))
2977                         seq_puts(s, "\n\t");
2978         }
2979
2980         seq_puts(s, "\n");
2981 }
2982
2983 static void hisi_sas_show_row_32(struct seq_file *s, int index,
2984                                  int sz, __le32 *ptr)
2985 {
2986         int i;
2987
2988         /* completion header size not fixed per HW version */
2989         seq_printf(s, "index %04d:\n\t", index);
2990         for (i = 1; i <= sz / 4; i++, ptr++) {
2991                 seq_printf(s, " 0x%08x", le32_to_cpu(*ptr));
2992                 if (!(i % 4))
2993                         seq_puts(s, "\n\t");
2994         }
2995         seq_puts(s, "\n");
2996 }
2997
2998 static void hisi_sas_cq_show_slot(struct seq_file *s, int slot,
2999                                   struct hisi_sas_debugfs_cq *debugfs_cq)
3000 {
3001         struct hisi_sas_cq *cq = debugfs_cq->cq;
3002         struct hisi_hba *hisi_hba = cq->hisi_hba;
3003         __le32 *complete_hdr = debugfs_cq->complete_hdr +
3004                                (hisi_hba->hw->complete_hdr_size * slot);
3005
3006         hisi_sas_show_row_32(s, slot,
3007                              hisi_hba->hw->complete_hdr_size,
3008                              complete_hdr);
3009 }
3010
3011 static int hisi_sas_debugfs_cq_show(struct seq_file *s, void *p)
3012 {
3013         struct hisi_sas_debugfs_cq *debugfs_cq = s->private;
3014         int slot;
3015
3016         for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
3017                 hisi_sas_cq_show_slot(s, slot, debugfs_cq);
3018         }
3019         return 0;
3020 }
3021
3022 static int hisi_sas_debugfs_cq_open(struct inode *inode, struct file *filp)
3023 {
3024         return single_open(filp, hisi_sas_debugfs_cq_show, inode->i_private);
3025 }
3026
3027 static const struct file_operations hisi_sas_debugfs_cq_fops = {
3028         .open = hisi_sas_debugfs_cq_open,
3029         .read = seq_read,
3030         .llseek = seq_lseek,
3031         .release = single_release,
3032         .owner = THIS_MODULE,
3033 };
3034
3035 static void hisi_sas_dq_show_slot(struct seq_file *s, int slot, void *dq_ptr)
3036 {
3037         struct hisi_sas_debugfs_dq *debugfs_dq = dq_ptr;
3038         void *cmd_queue = debugfs_dq->hdr;
3039         __le32 *cmd_hdr = cmd_queue +
3040                 sizeof(struct hisi_sas_cmd_hdr) * slot;
3041
3042         hisi_sas_show_row_32(s, slot, sizeof(struct hisi_sas_cmd_hdr), cmd_hdr);
3043 }
3044
3045 static int hisi_sas_debugfs_dq_show(struct seq_file *s, void *p)
3046 {
3047         int slot;
3048
3049         for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
3050                 hisi_sas_dq_show_slot(s, slot, s->private);
3051         }
3052         return 0;
3053 }
3054
3055 static int hisi_sas_debugfs_dq_open(struct inode *inode, struct file *filp)
3056 {
3057         return single_open(filp, hisi_sas_debugfs_dq_show, inode->i_private);
3058 }
3059
3060 static const struct file_operations hisi_sas_debugfs_dq_fops = {
3061         .open = hisi_sas_debugfs_dq_open,
3062         .read = seq_read,
3063         .llseek = seq_lseek,
3064         .release = single_release,
3065         .owner = THIS_MODULE,
3066 };
3067
3068 static int hisi_sas_debugfs_iost_show(struct seq_file *s, void *p)
3069 {
3070         struct hisi_sas_debugfs_iost *debugfs_iost = s->private;
3071         struct hisi_sas_iost *iost = debugfs_iost->iost;
3072         int i, max_command_entries = HISI_SAS_MAX_COMMANDS;
3073
3074         for (i = 0; i < max_command_entries; i++, iost++) {
3075                 __le64 *data = &iost->qw0;
3076
3077                 hisi_sas_show_row_64(s, i, sizeof(*iost), data);
3078         }
3079
3080         return 0;
3081 }
3082
3083 static int hisi_sas_debugfs_iost_open(struct inode *inode, struct file *filp)
3084 {
3085         return single_open(filp, hisi_sas_debugfs_iost_show, inode->i_private);
3086 }
3087
3088 static const struct file_operations hisi_sas_debugfs_iost_fops = {
3089         .open = hisi_sas_debugfs_iost_open,
3090         .read = seq_read,
3091         .llseek = seq_lseek,
3092         .release = single_release,
3093         .owner = THIS_MODULE,
3094 };
3095
3096 static int hisi_sas_debugfs_iost_cache_show(struct seq_file *s, void *p)
3097 {
3098         struct hisi_sas_debugfs_iost_cache *debugfs_iost_cache = s->private;
3099         struct hisi_sas_iost_itct_cache *iost_cache = debugfs_iost_cache->cache;
3100         u32 cache_size = HISI_SAS_IOST_ITCT_CACHE_DW_SZ * 4;
3101         int i, tab_idx;
3102         __le64 *iost;
3103
3104         for (i = 0; i < HISI_SAS_IOST_ITCT_CACHE_NUM; i++, iost_cache++) {
3105                 /*
3106                  * Data struct of IOST cache:
3107                  * Data[1]: BIT0~15: Table index
3108                  *          Bit16:   Valid mask
3109                  * Data[2]~[9]: IOST table
3110                  */
3111                 tab_idx = (iost_cache->data[1] & 0xffff);
3112                 iost = (__le64 *)iost_cache;
3113
3114                 hisi_sas_show_row_64(s, tab_idx, cache_size, iost);
3115         }
3116
3117         return 0;
3118 }
3119
3120 static int hisi_sas_debugfs_iost_cache_open(struct inode *inode,
3121                                             struct file *filp)
3122 {
3123         return single_open(filp, hisi_sas_debugfs_iost_cache_show,
3124                            inode->i_private);
3125 }
3126
3127 static const struct file_operations hisi_sas_debugfs_iost_cache_fops = {
3128         .open = hisi_sas_debugfs_iost_cache_open,
3129         .read = seq_read,
3130         .llseek = seq_lseek,
3131         .release = single_release,
3132         .owner = THIS_MODULE,
3133 };
3134
3135 static int hisi_sas_debugfs_itct_show(struct seq_file *s, void *p)
3136 {
3137         int i;
3138         struct hisi_sas_debugfs_itct *debugfs_itct = s->private;
3139         struct hisi_sas_itct *itct = debugfs_itct->itct;
3140
3141         for (i = 0; i < HISI_SAS_MAX_ITCT_ENTRIES; i++, itct++) {
3142                 __le64 *data = &itct->qw0;
3143
3144                 hisi_sas_show_row_64(s, i, sizeof(*itct), data);
3145         }
3146
3147         return 0;
3148 }
3149
3150 static int hisi_sas_debugfs_itct_open(struct inode *inode, struct file *filp)
3151 {
3152         return single_open(filp, hisi_sas_debugfs_itct_show, inode->i_private);
3153 }
3154
3155 static const struct file_operations hisi_sas_debugfs_itct_fops = {
3156         .open = hisi_sas_debugfs_itct_open,
3157         .read = seq_read,
3158         .llseek = seq_lseek,
3159         .release = single_release,
3160         .owner = THIS_MODULE,
3161 };
3162
3163 static int hisi_sas_debugfs_itct_cache_show(struct seq_file *s, void *p)
3164 {
3165         struct hisi_sas_debugfs_itct_cache *debugfs_itct_cache = s->private;
3166         struct hisi_sas_iost_itct_cache *itct_cache = debugfs_itct_cache->cache;
3167         u32 cache_size = HISI_SAS_IOST_ITCT_CACHE_DW_SZ * 4;
3168         int i, tab_idx;
3169         __le64 *itct;
3170
3171         for (i = 0; i < HISI_SAS_IOST_ITCT_CACHE_NUM; i++, itct_cache++) {
3172                 /*
3173                  * Data struct of ITCT cache:
3174                  * Data[1]: BIT0~15: Table index
3175                  *          Bit16:   Valid mask
3176                  * Data[2]~[9]: ITCT table
3177                  */
3178                 tab_idx = itct_cache->data[1] & 0xffff;
3179                 itct = (__le64 *)itct_cache;
3180
3181                 hisi_sas_show_row_64(s, tab_idx, cache_size, itct);
3182         }
3183
3184         return 0;
3185 }
3186
3187 static int hisi_sas_debugfs_itct_cache_open(struct inode *inode,
3188                                             struct file *filp)
3189 {
3190         return single_open(filp, hisi_sas_debugfs_itct_cache_show,
3191                            inode->i_private);
3192 }
3193
3194 static const struct file_operations hisi_sas_debugfs_itct_cache_fops = {
3195         .open = hisi_sas_debugfs_itct_cache_open,
3196         .read = seq_read,
3197         .llseek = seq_lseek,
3198         .release = single_release,
3199         .owner = THIS_MODULE,
3200 };
3201
3202 static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
3203 {
3204         u64 *debugfs_timestamp;
3205         int dump_index = hisi_hba->debugfs_dump_index;
3206         struct dentry *dump_dentry;
3207         struct dentry *dentry;
3208         char name[256];
3209         int p;
3210         int c;
3211         int d;
3212
3213         snprintf(name, 256, "%d", dump_index);
3214
3215         dump_dentry = debugfs_create_dir(name, hisi_hba->debugfs_dump_dentry);
3216
3217         debugfs_timestamp = &hisi_hba->debugfs_timestamp[dump_index];
3218
3219         debugfs_create_u64("timestamp", 0400, dump_dentry,
3220                            debugfs_timestamp);
3221
3222         debugfs_create_file("global", 0400, dump_dentry,
3223                            &hisi_hba->debugfs_regs[dump_index][DEBUGFS_GLOBAL],
3224                            &hisi_sas_debugfs_global_fops);
3225
3226         /* Create port dir and files */
3227         dentry = debugfs_create_dir("port", dump_dentry);
3228         for (p = 0; p < hisi_hba->n_phy; p++) {
3229                 snprintf(name, 256, "%d", p);
3230
3231                 debugfs_create_file(name, 0400, dentry,
3232                                     &hisi_hba->debugfs_port_reg[dump_index][p],
3233                                     &hisi_sas_debugfs_port_fops);
3234         }
3235
3236         /* Create CQ dir and files */
3237         dentry = debugfs_create_dir("cq", dump_dentry);
3238         for (c = 0; c < hisi_hba->queue_count; c++) {
3239                 snprintf(name, 256, "%d", c);
3240
3241                 debugfs_create_file(name, 0400, dentry,
3242                                     &hisi_hba->debugfs_cq[dump_index][c],
3243                                     &hisi_sas_debugfs_cq_fops);
3244         }
3245
3246         /* Create DQ dir and files */
3247         dentry = debugfs_create_dir("dq", dump_dentry);
3248         for (d = 0; d < hisi_hba->queue_count; d++) {
3249                 snprintf(name, 256, "%d", d);
3250
3251                 debugfs_create_file(name, 0400, dentry,
3252                                     &hisi_hba->debugfs_dq[dump_index][d],
3253                                     &hisi_sas_debugfs_dq_fops);
3254         }
3255
3256         debugfs_create_file("iost", 0400, dump_dentry,
3257                             &hisi_hba->debugfs_iost[dump_index],
3258                             &hisi_sas_debugfs_iost_fops);
3259
3260         debugfs_create_file("iost_cache", 0400, dump_dentry,
3261                             &hisi_hba->debugfs_iost_cache[dump_index],
3262                             &hisi_sas_debugfs_iost_cache_fops);
3263
3264         debugfs_create_file("itct", 0400, dump_dentry,
3265                             &hisi_hba->debugfs_itct[dump_index],
3266                             &hisi_sas_debugfs_itct_fops);
3267
3268         debugfs_create_file("itct_cache", 0400, dump_dentry,
3269                             &hisi_hba->debugfs_itct_cache[dump_index],
3270                             &hisi_sas_debugfs_itct_cache_fops);
3271
3272         debugfs_create_file("axi", 0400, dump_dentry,
3273                             &hisi_hba->debugfs_regs[dump_index][DEBUGFS_AXI],
3274                             &hisi_sas_debugfs_axi_fops);
3275
3276         debugfs_create_file("ras", 0400, dump_dentry,
3277                             &hisi_hba->debugfs_regs[dump_index][DEBUGFS_RAS],
3278                             &hisi_sas_debugfs_ras_fops);
3279
3280         return;
3281 }
3282
3283 static void hisi_sas_debugfs_snapshot_regs(struct hisi_hba *hisi_hba)
3284 {
3285         hisi_hba->hw->snapshot_prepare(hisi_hba);
3286
3287         hisi_sas_debugfs_snapshot_global_reg(hisi_hba);
3288         hisi_sas_debugfs_snapshot_port_reg(hisi_hba);
3289         hisi_sas_debugfs_snapshot_axi_reg(hisi_hba);
3290         hisi_sas_debugfs_snapshot_ras_reg(hisi_hba);
3291         hisi_sas_debugfs_snapshot_cq_reg(hisi_hba);
3292         hisi_sas_debugfs_snapshot_dq_reg(hisi_hba);
3293         hisi_sas_debugfs_snapshot_itct_reg(hisi_hba);
3294         hisi_sas_debugfs_snapshot_iost_reg(hisi_hba);
3295
3296         hisi_sas_debugfs_create_files(hisi_hba);
3297
3298         hisi_hba->hw->snapshot_restore(hisi_hba);
3299 }
3300
3301 static ssize_t hisi_sas_debugfs_trigger_dump_write(struct file *file,
3302                                                    const char __user *user_buf,
3303                                                    size_t count, loff_t *ppos)
3304 {
3305         struct hisi_hba *hisi_hba = file->f_inode->i_private;
3306         char buf[8];
3307
3308         if (hisi_hba->debugfs_dump_index >= hisi_sas_debugfs_dump_count)
3309                 return -EFAULT;
3310
3311         if (count > 8)
3312                 return -EFAULT;
3313
3314         if (copy_from_user(buf, user_buf, count))
3315                 return -EFAULT;
3316
3317         if (buf[0] != '1')
3318                 return -EFAULT;
3319
3320         queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
3321
3322         return count;
3323 }
3324
3325 static const struct file_operations hisi_sas_debugfs_trigger_dump_fops = {
3326         .write = &hisi_sas_debugfs_trigger_dump_write,
3327         .owner = THIS_MODULE,
3328 };
3329
3330 enum {
3331         HISI_SAS_BIST_LOOPBACK_MODE_DIGITAL = 0,
3332         HISI_SAS_BIST_LOOPBACK_MODE_SERDES,
3333         HISI_SAS_BIST_LOOPBACK_MODE_REMOTE,
3334 };
3335
3336 enum {
3337         HISI_SAS_BIST_CODE_MODE_PRBS7 = 0,
3338         HISI_SAS_BIST_CODE_MODE_PRBS23,
3339         HISI_SAS_BIST_CODE_MODE_PRBS31,
3340         HISI_SAS_BIST_CODE_MODE_JTPAT,
3341         HISI_SAS_BIST_CODE_MODE_CJTPAT,
3342         HISI_SAS_BIST_CODE_MODE_SCRAMBED_0,
3343         HISI_SAS_BIST_CODE_MODE_TRAIN,
3344         HISI_SAS_BIST_CODE_MODE_TRAIN_DONE,
3345         HISI_SAS_BIST_CODE_MODE_HFTP,
3346         HISI_SAS_BIST_CODE_MODE_MFTP,
3347         HISI_SAS_BIST_CODE_MODE_LFTP,
3348         HISI_SAS_BIST_CODE_MODE_FIXED_DATA,
3349 };
3350
3351 static const struct {
3352         int             value;
3353         char            *name;
3354 } hisi_sas_debugfs_loop_linkrate[] = {
3355         { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
3356         { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
3357         { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
3358         { SAS_LINK_RATE_12_0_GBPS, "12.0 Gbit" },
3359 };
3360
3361 static int hisi_sas_debugfs_bist_linkrate_show(struct seq_file *s, void *p)
3362 {
3363         struct hisi_hba *hisi_hba = s->private;
3364         int i;
3365
3366         for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_linkrate); i++) {
3367                 int match = (hisi_hba->debugfs_bist_linkrate ==
3368                              hisi_sas_debugfs_loop_linkrate[i].value);
3369
3370                 seq_printf(s, "%s%s%s ", match ? "[" : "",
3371                            hisi_sas_debugfs_loop_linkrate[i].name,
3372                            match ? "]" : "");
3373         }
3374         seq_puts(s, "\n");
3375
3376         return 0;
3377 }
3378
3379 static ssize_t hisi_sas_debugfs_bist_linkrate_write(struct file *filp,
3380                                                     const char __user *buf,
3381                                                     size_t count, loff_t *ppos)
3382 {
3383         struct seq_file *m = filp->private_data;
3384         struct hisi_hba *hisi_hba = m->private;
3385         char kbuf[16] = {}, *pkbuf;
3386         bool found = false;
3387         int i;
3388
3389         if (hisi_hba->debugfs_bist_enable)
3390                 return -EPERM;
3391
3392         if (count >= sizeof(kbuf))
3393                 return -EOVERFLOW;
3394
3395         if (copy_from_user(kbuf, buf, count))
3396                 return -EINVAL;
3397
3398         pkbuf = strstrip(kbuf);
3399
3400         for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_linkrate); i++) {
3401                 if (!strncmp(hisi_sas_debugfs_loop_linkrate[i].name,
3402                              pkbuf, 16)) {
3403                         hisi_hba->debugfs_bist_linkrate =
3404                                 hisi_sas_debugfs_loop_linkrate[i].value;
3405                         found = true;
3406                         break;
3407                 }
3408         }
3409
3410         if (!found)
3411                 return -EINVAL;
3412
3413         return count;
3414 }
3415
3416 static int hisi_sas_debugfs_bist_linkrate_open(struct inode *inode,
3417                                                struct file *filp)
3418 {
3419         return single_open(filp, hisi_sas_debugfs_bist_linkrate_show,
3420                            inode->i_private);
3421 }
3422
3423 static const struct file_operations hisi_sas_debugfs_bist_linkrate_ops = {
3424         .open = hisi_sas_debugfs_bist_linkrate_open,
3425         .read = seq_read,
3426         .write = hisi_sas_debugfs_bist_linkrate_write,
3427         .llseek = seq_lseek,
3428         .release = single_release,
3429         .owner = THIS_MODULE,
3430 };
3431
3432 static const struct {
3433         int             value;
3434         char            *name;
3435 } hisi_sas_debugfs_loop_code_mode[] = {
3436         { HISI_SAS_BIST_CODE_MODE_PRBS7, "PRBS7" },
3437         { HISI_SAS_BIST_CODE_MODE_PRBS23, "PRBS23" },
3438         { HISI_SAS_BIST_CODE_MODE_PRBS31, "PRBS31" },
3439         { HISI_SAS_BIST_CODE_MODE_JTPAT, "JTPAT" },
3440         { HISI_SAS_BIST_CODE_MODE_CJTPAT, "CJTPAT" },
3441         { HISI_SAS_BIST_CODE_MODE_SCRAMBED_0, "SCRAMBED_0" },
3442         { HISI_SAS_BIST_CODE_MODE_TRAIN, "TRAIN" },
3443         { HISI_SAS_BIST_CODE_MODE_TRAIN_DONE, "TRAIN_DONE" },
3444         { HISI_SAS_BIST_CODE_MODE_HFTP, "HFTP" },
3445         { HISI_SAS_BIST_CODE_MODE_MFTP, "MFTP" },
3446         { HISI_SAS_BIST_CODE_MODE_LFTP, "LFTP" },
3447         { HISI_SAS_BIST_CODE_MODE_FIXED_DATA, "FIXED_DATA" },
3448 };
3449
3450 static int hisi_sas_debugfs_bist_code_mode_show(struct seq_file *s, void *p)
3451 {
3452         struct hisi_hba *hisi_hba = s->private;
3453         int i;
3454
3455         for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_code_mode); i++) {
3456                 int match = (hisi_hba->debugfs_bist_code_mode ==
3457                              hisi_sas_debugfs_loop_code_mode[i].value);
3458
3459                 seq_printf(s, "%s%s%s ", match ? "[" : "",
3460                            hisi_sas_debugfs_loop_code_mode[i].name,
3461                            match ? "]" : "");
3462         }
3463         seq_puts(s, "\n");
3464
3465         return 0;
3466 }
3467
3468 static ssize_t hisi_sas_debugfs_bist_code_mode_write(struct file *filp,
3469                                                      const char __user *buf,
3470                                                      size_t count,
3471                                                      loff_t *ppos)
3472 {
3473         struct seq_file *m = filp->private_data;
3474         struct hisi_hba *hisi_hba = m->private;
3475         char kbuf[16] = {}, *pkbuf;
3476         bool found = false;
3477         int i;
3478
3479         if (hisi_hba->debugfs_bist_enable)
3480                 return -EPERM;
3481
3482         if (count >= sizeof(kbuf))
3483                 return -EINVAL;
3484
3485         if (copy_from_user(kbuf, buf, count))
3486                 return -EOVERFLOW;
3487
3488         pkbuf = strstrip(kbuf);
3489
3490         for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_code_mode); i++) {
3491                 if (!strncmp(hisi_sas_debugfs_loop_code_mode[i].name,
3492                              pkbuf, 16)) {
3493                         hisi_hba->debugfs_bist_code_mode =
3494                                 hisi_sas_debugfs_loop_code_mode[i].value;
3495                         found = true;
3496                         break;
3497                 }
3498         }
3499
3500         if (!found)
3501                 return -EINVAL;
3502
3503         return count;
3504 }
3505
3506 static int hisi_sas_debugfs_bist_code_mode_open(struct inode *inode,
3507                                                 struct file *filp)
3508 {
3509         return single_open(filp, hisi_sas_debugfs_bist_code_mode_show,
3510                            inode->i_private);
3511 }
3512
3513 static const struct file_operations hisi_sas_debugfs_bist_code_mode_ops = {
3514         .open = hisi_sas_debugfs_bist_code_mode_open,
3515         .read = seq_read,
3516         .write = hisi_sas_debugfs_bist_code_mode_write,
3517         .llseek = seq_lseek,
3518         .release = single_release,
3519         .owner = THIS_MODULE,
3520 };
3521
3522 static ssize_t hisi_sas_debugfs_bist_phy_write(struct file *filp,
3523                                                const char __user *buf,
3524                                                size_t count, loff_t *ppos)
3525 {
3526         struct seq_file *m = filp->private_data;
3527         struct hisi_hba *hisi_hba = m->private;
3528         unsigned int phy_no;
3529         int val;
3530
3531         if (hisi_hba->debugfs_bist_enable)
3532                 return -EPERM;
3533
3534         val = kstrtouint_from_user(buf, count, 0, &phy_no);
3535         if (val)
3536                 return val;
3537
3538         if (phy_no >= hisi_hba->n_phy)
3539                 return -EINVAL;
3540
3541         hisi_hba->debugfs_bist_phy_no = phy_no;
3542
3543         return count;
3544 }
3545
3546 static int hisi_sas_debugfs_bist_phy_show(struct seq_file *s, void *p)
3547 {
3548         struct hisi_hba *hisi_hba = s->private;
3549
3550         seq_printf(s, "%d\n", hisi_hba->debugfs_bist_phy_no);
3551
3552         return 0;
3553 }
3554
3555 static int hisi_sas_debugfs_bist_phy_open(struct inode *inode,
3556                                           struct file *filp)
3557 {
3558         return single_open(filp, hisi_sas_debugfs_bist_phy_show,
3559                            inode->i_private);
3560 }
3561
3562 static const struct file_operations hisi_sas_debugfs_bist_phy_ops = {
3563         .open = hisi_sas_debugfs_bist_phy_open,
3564         .read = seq_read,
3565         .write = hisi_sas_debugfs_bist_phy_write,
3566         .llseek = seq_lseek,
3567         .release = single_release,
3568         .owner = THIS_MODULE,
3569 };
3570
3571 static const struct {
3572         int             value;
3573         char            *name;
3574 } hisi_sas_debugfs_loop_modes[] = {
3575         { HISI_SAS_BIST_LOOPBACK_MODE_DIGITAL, "digital" },
3576         { HISI_SAS_BIST_LOOPBACK_MODE_SERDES, "serdes" },
3577         { HISI_SAS_BIST_LOOPBACK_MODE_REMOTE, "remote" },
3578 };
3579
3580 static int hisi_sas_debugfs_bist_mode_show(struct seq_file *s, void *p)
3581 {
3582         struct hisi_hba *hisi_hba = s->private;
3583         int i;
3584
3585         for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_modes); i++) {
3586                 int match = (hisi_hba->debugfs_bist_mode ==
3587                              hisi_sas_debugfs_loop_modes[i].value);
3588
3589                 seq_printf(s, "%s%s%s ", match ? "[" : "",
3590                            hisi_sas_debugfs_loop_modes[i].name,
3591                            match ? "]" : "");
3592         }
3593         seq_puts(s, "\n");
3594
3595         return 0;
3596 }
3597
3598 static ssize_t hisi_sas_debugfs_bist_mode_write(struct file *filp,
3599                                                 const char __user *buf,
3600                                                 size_t count, loff_t *ppos)
3601 {
3602         struct seq_file *m = filp->private_data;
3603         struct hisi_hba *hisi_hba = m->private;
3604         char kbuf[16] = {}, *pkbuf;
3605         bool found = false;
3606         int i;
3607
3608         if (hisi_hba->debugfs_bist_enable)
3609                 return -EPERM;
3610
3611         if (count >= sizeof(kbuf))
3612                 return -EINVAL;
3613
3614         if (copy_from_user(kbuf, buf, count))
3615                 return -EOVERFLOW;
3616
3617         pkbuf = strstrip(kbuf);
3618
3619         for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_modes); i++) {
3620                 if (!strncmp(hisi_sas_debugfs_loop_modes[i].name, pkbuf, 16)) {
3621                         hisi_hba->debugfs_bist_mode =
3622                                 hisi_sas_debugfs_loop_modes[i].value;
3623                         found = true;
3624                         break;
3625                 }
3626         }
3627
3628         if (!found)
3629                 return -EINVAL;
3630
3631         return count;
3632 }
3633
3634 static int hisi_sas_debugfs_bist_mode_open(struct inode *inode,
3635                                            struct file *filp)
3636 {
3637         return single_open(filp, hisi_sas_debugfs_bist_mode_show,
3638                            inode->i_private);
3639 }
3640
3641 static const struct file_operations hisi_sas_debugfs_bist_mode_ops = {
3642         .open = hisi_sas_debugfs_bist_mode_open,
3643         .read = seq_read,
3644         .write = hisi_sas_debugfs_bist_mode_write,
3645         .llseek = seq_lseek,
3646         .release = single_release,
3647         .owner = THIS_MODULE,
3648 };
3649
3650 static ssize_t hisi_sas_debugfs_bist_enable_write(struct file *filp,
3651                                                   const char __user *buf,
3652                                                   size_t count, loff_t *ppos)
3653 {
3654         struct seq_file *m = filp->private_data;
3655         struct hisi_hba *hisi_hba = m->private;
3656         unsigned int enable;
3657         int val;
3658
3659         val = kstrtouint_from_user(buf, count, 0, &enable);
3660         if (val)
3661                 return val;
3662
3663         if (enable > 1)
3664                 return -EINVAL;
3665
3666         if (enable == hisi_hba->debugfs_bist_enable)
3667                 return count;
3668
3669         if (!hisi_hba->hw->set_bist)
3670                 return -EPERM;
3671
3672         val = hisi_hba->hw->set_bist(hisi_hba, enable);
3673         if (val < 0)
3674                 return val;
3675
3676         hisi_hba->debugfs_bist_enable = enable;
3677
3678         return count;
3679 }
3680
3681 static int hisi_sas_debugfs_bist_enable_show(struct seq_file *s, void *p)
3682 {
3683         struct hisi_hba *hisi_hba = s->private;
3684
3685         seq_printf(s, "%d\n", hisi_hba->debugfs_bist_enable);
3686
3687         return 0;
3688 }
3689
3690 static int hisi_sas_debugfs_bist_enable_open(struct inode *inode,
3691                                              struct file *filp)
3692 {
3693         return single_open(filp, hisi_sas_debugfs_bist_enable_show,
3694                            inode->i_private);
3695 }
3696
3697 static const struct file_operations hisi_sas_debugfs_bist_enable_ops = {
3698         .open = hisi_sas_debugfs_bist_enable_open,
3699         .read = seq_read,
3700         .write = hisi_sas_debugfs_bist_enable_write,
3701         .llseek = seq_lseek,
3702         .release = single_release,
3703         .owner = THIS_MODULE,
3704 };
3705
3706 static ssize_t hisi_sas_debugfs_phy_down_cnt_write(struct file *filp,
3707                                                    const char __user *buf,
3708                                                    size_t count, loff_t *ppos)
3709 {
3710         struct seq_file *s = filp->private_data;
3711         struct hisi_sas_phy *phy = s->private;
3712         unsigned int set_val;
3713         int res;
3714
3715         res = kstrtouint_from_user(buf, count, 0, &set_val);
3716         if (res)
3717                 return res;
3718
3719         if (set_val > 0)
3720                 return -EINVAL;
3721
3722         atomic_set(&phy->down_cnt, 0);
3723
3724         return count;
3725 }
3726
3727 static int hisi_sas_debugfs_phy_down_cnt_show(struct seq_file *s, void *p)
3728 {
3729         struct hisi_sas_phy *phy = s->private;
3730
3731         seq_printf(s, "%d\n", atomic_read(&phy->down_cnt));
3732
3733         return 0;
3734 }
3735
3736 static int hisi_sas_debugfs_phy_down_cnt_open(struct inode *inode,
3737                                               struct file *filp)
3738 {
3739         return single_open(filp, hisi_sas_debugfs_phy_down_cnt_show,
3740                            inode->i_private);
3741 }
3742
3743 static const struct file_operations hisi_sas_debugfs_phy_down_cnt_ops = {
3744         .open = hisi_sas_debugfs_phy_down_cnt_open,
3745         .read = seq_read,
3746         .write = hisi_sas_debugfs_phy_down_cnt_write,
3747         .llseek = seq_lseek,
3748         .release = single_release,
3749         .owner = THIS_MODULE,
3750 };
3751
3752 void hisi_sas_debugfs_work_handler(struct work_struct *work)
3753 {
3754         struct hisi_hba *hisi_hba =
3755                 container_of(work, struct hisi_hba, debugfs_work);
3756         int debugfs_dump_index = hisi_hba->debugfs_dump_index;
3757         struct device *dev = hisi_hba->dev;
3758         u64 timestamp = local_clock();
3759
3760         if (debugfs_dump_index >= hisi_sas_debugfs_dump_count) {
3761                 dev_warn(dev, "dump count exceeded!\n");
3762                 return;
3763         }
3764
3765         do_div(timestamp, NSEC_PER_MSEC);
3766         hisi_hba->debugfs_timestamp[debugfs_dump_index] = timestamp;
3767
3768         hisi_sas_debugfs_snapshot_regs(hisi_hba);
3769         hisi_hba->debugfs_dump_index++;
3770 }
3771 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_work_handler);
3772
3773 static void hisi_sas_debugfs_release(struct hisi_hba *hisi_hba, int dump_index)
3774 {
3775         struct device *dev = hisi_hba->dev;
3776         int i;
3777
3778         devm_kfree(dev, hisi_hba->debugfs_iost_cache[dump_index].cache);
3779         devm_kfree(dev, hisi_hba->debugfs_itct_cache[dump_index].cache);
3780         devm_kfree(dev, hisi_hba->debugfs_iost[dump_index].iost);
3781         devm_kfree(dev, hisi_hba->debugfs_itct[dump_index].itct);
3782
3783         for (i = 0; i < hisi_hba->queue_count; i++)
3784                 devm_kfree(dev, hisi_hba->debugfs_dq[dump_index][i].hdr);
3785
3786         for (i = 0; i < hisi_hba->queue_count; i++)
3787                 devm_kfree(dev,
3788                            hisi_hba->debugfs_cq[dump_index][i].complete_hdr);
3789
3790         for (i = 0; i < DEBUGFS_REGS_NUM; i++)
3791                 devm_kfree(dev, hisi_hba->debugfs_regs[dump_index][i].data);
3792
3793         for (i = 0; i < hisi_hba->n_phy; i++)
3794                 devm_kfree(dev, hisi_hba->debugfs_port_reg[dump_index][i].data);
3795 }
3796
3797 static int hisi_sas_debugfs_alloc(struct hisi_hba *hisi_hba, int dump_index)
3798 {
3799         const struct hisi_sas_hw *hw = hisi_hba->hw;
3800         struct device *dev = hisi_hba->dev;
3801         int p, c, d, r, i;
3802         size_t sz;
3803
3804         for (r = 0; r < DEBUGFS_REGS_NUM; r++) {
3805                 struct hisi_sas_debugfs_regs *regs =
3806                                 &hisi_hba->debugfs_regs[dump_index][r];
3807
3808                 sz = hw->debugfs_reg_array[r]->count * 4;
3809                 regs->data = devm_kmalloc(dev, sz, GFP_KERNEL);
3810                 if (!regs->data)
3811                         goto fail;
3812                 regs->hisi_hba = hisi_hba;
3813         }
3814
3815         sz = hw->debugfs_reg_port->count * 4;
3816         for (p = 0; p < hisi_hba->n_phy; p++) {
3817                 struct hisi_sas_debugfs_port *port =
3818                                 &hisi_hba->debugfs_port_reg[dump_index][p];
3819
3820                 port->data = devm_kmalloc(dev, sz, GFP_KERNEL);
3821                 if (!port->data)
3822                         goto fail;
3823                 port->phy = &hisi_hba->phy[p];
3824         }
3825
3826         sz = hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
3827         for (c = 0; c < hisi_hba->queue_count; c++) {
3828                 struct hisi_sas_debugfs_cq *cq =
3829                                 &hisi_hba->debugfs_cq[dump_index][c];
3830
3831                 cq->complete_hdr = devm_kmalloc(dev, sz, GFP_KERNEL);
3832                 if (!cq->complete_hdr)
3833                         goto fail;
3834                 cq->cq = &hisi_hba->cq[c];
3835         }
3836
3837         sz = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
3838         for (d = 0; d < hisi_hba->queue_count; d++) {
3839                 struct hisi_sas_debugfs_dq *dq =
3840                                 &hisi_hba->debugfs_dq[dump_index][d];
3841
3842                 dq->hdr = devm_kmalloc(dev, sz, GFP_KERNEL);
3843                 if (!dq->hdr)
3844                         goto fail;
3845                 dq->dq = &hisi_hba->dq[d];
3846         }
3847
3848         sz = HISI_SAS_MAX_COMMANDS * sizeof(struct hisi_sas_iost);
3849
3850         hisi_hba->debugfs_iost[dump_index].iost =
3851                                 devm_kmalloc(dev, sz, GFP_KERNEL);
3852         if (!hisi_hba->debugfs_iost[dump_index].iost)
3853                 goto fail;
3854
3855         sz = HISI_SAS_IOST_ITCT_CACHE_NUM *
3856              sizeof(struct hisi_sas_iost_itct_cache);
3857
3858         hisi_hba->debugfs_iost_cache[dump_index].cache =
3859                                 devm_kmalloc(dev, sz, GFP_KERNEL);
3860         if (!hisi_hba->debugfs_iost_cache[dump_index].cache)
3861                 goto fail;
3862
3863         sz = HISI_SAS_IOST_ITCT_CACHE_NUM *
3864              sizeof(struct hisi_sas_iost_itct_cache);
3865
3866         hisi_hba->debugfs_itct_cache[dump_index].cache =
3867                                 devm_kmalloc(dev, sz, GFP_KERNEL);
3868         if (!hisi_hba->debugfs_itct_cache[dump_index].cache)
3869                 goto fail;
3870
3871         /* New memory allocation must be locate before itct */
3872         sz = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
3873
3874         hisi_hba->debugfs_itct[dump_index].itct =
3875                                 devm_kmalloc(dev, sz, GFP_KERNEL);
3876         if (!hisi_hba->debugfs_itct[dump_index].itct)
3877                 goto fail;
3878
3879         return 0;
3880 fail:
3881         for (i = 0; i < hisi_sas_debugfs_dump_count; i++)
3882                 hisi_sas_debugfs_release(hisi_hba, i);
3883         return -ENOMEM;
3884 }
3885
3886 static void hisi_sas_debugfs_phy_down_cnt_init(struct hisi_hba *hisi_hba)
3887 {
3888         struct dentry *dir = debugfs_create_dir("phy_down_cnt",
3889                                                 hisi_hba->debugfs_dir);
3890         char name[16];
3891         int phy_no;
3892
3893         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
3894                 snprintf(name, 16, "%d", phy_no);
3895                 debugfs_create_file(name, 0600, dir,
3896                                     &hisi_hba->phy[phy_no],
3897                                     &hisi_sas_debugfs_phy_down_cnt_ops);
3898         }
3899 }
3900
3901 static void hisi_sas_debugfs_bist_init(struct hisi_hba *hisi_hba)
3902 {
3903         hisi_hba->debugfs_bist_dentry =
3904                         debugfs_create_dir("bist", hisi_hba->debugfs_dir);
3905         debugfs_create_file("link_rate", 0600,
3906                             hisi_hba->debugfs_bist_dentry, hisi_hba,
3907                             &hisi_sas_debugfs_bist_linkrate_ops);
3908
3909         debugfs_create_file("code_mode", 0600,
3910                             hisi_hba->debugfs_bist_dentry, hisi_hba,
3911                             &hisi_sas_debugfs_bist_code_mode_ops);
3912
3913         debugfs_create_file("phy_id", 0600, hisi_hba->debugfs_bist_dentry,
3914                             hisi_hba, &hisi_sas_debugfs_bist_phy_ops);
3915
3916         debugfs_create_u32("cnt", 0600, hisi_hba->debugfs_bist_dentry,
3917                            &hisi_hba->debugfs_bist_cnt);
3918
3919         debugfs_create_file("loopback_mode", 0600,
3920                             hisi_hba->debugfs_bist_dentry,
3921                             hisi_hba, &hisi_sas_debugfs_bist_mode_ops);
3922
3923         debugfs_create_file("enable", 0600, hisi_hba->debugfs_bist_dentry,
3924                             hisi_hba, &hisi_sas_debugfs_bist_enable_ops);
3925
3926         hisi_hba->debugfs_bist_linkrate = SAS_LINK_RATE_1_5_GBPS;
3927 }
3928
3929 void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba)
3930 {
3931         struct device *dev = hisi_hba->dev;
3932         int i;
3933
3934         hisi_hba->debugfs_dir = debugfs_create_dir(dev_name(dev),
3935                                                    hisi_sas_debugfs_dir);
3936         debugfs_create_file("trigger_dump", 0200,
3937                             hisi_hba->debugfs_dir,
3938                             hisi_hba,
3939                             &hisi_sas_debugfs_trigger_dump_fops);
3940
3941         /* create bist structures */
3942         hisi_sas_debugfs_bist_init(hisi_hba);
3943
3944         hisi_hba->debugfs_dump_dentry =
3945                         debugfs_create_dir("dump", hisi_hba->debugfs_dir);
3946
3947         hisi_sas_debugfs_phy_down_cnt_init(hisi_hba);
3948
3949         for (i = 0; i < hisi_sas_debugfs_dump_count; i++) {
3950                 if (hisi_sas_debugfs_alloc(hisi_hba, i)) {
3951                         debugfs_remove_recursive(hisi_hba->debugfs_dir);
3952                         dev_dbg(dev, "failed to init debugfs!\n");
3953                         break;
3954                 }
3955         }
3956 }
3957 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_init);
3958
3959 void hisi_sas_debugfs_exit(struct hisi_hba *hisi_hba)
3960 {
3961         debugfs_remove_recursive(hisi_hba->debugfs_dir);
3962 }
3963 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_exit);
3964
3965 int hisi_sas_remove(struct platform_device *pdev)
3966 {
3967         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
3968         struct hisi_hba *hisi_hba = sha->lldd_ha;
3969         struct Scsi_Host *shost = sha->core.shost;
3970
3971         if (timer_pending(&hisi_hba->timer))
3972                 del_timer(&hisi_hba->timer);
3973
3974         sas_unregister_ha(sha);
3975         sas_remove_host(sha->core.shost);
3976
3977         hisi_sas_free(hisi_hba);
3978         scsi_host_put(shost);
3979         return 0;
3980 }
3981 EXPORT_SYMBOL_GPL(hisi_sas_remove);
3982
3983 bool hisi_sas_debugfs_enable;
3984 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
3985 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
3986 MODULE_PARM_DESC(hisi_sas_debugfs_enable, "Enable driver debugfs (default disabled)");
3987
3988 u32 hisi_sas_debugfs_dump_count = 1;
3989 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
3990 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
3991 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
3992
3993 static __init int hisi_sas_init(void)
3994 {
3995         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
3996         if (!hisi_sas_stt)
3997                 return -ENOMEM;
3998
3999         if (hisi_sas_debugfs_enable) {
4000                 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
4001                 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
4002                         pr_info("hisi_sas: Limiting debugfs dump count\n");
4003                         hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
4004                 }
4005         }
4006
4007         return 0;
4008 }
4009
4010 static __exit void hisi_sas_exit(void)
4011 {
4012         sas_release_transport(hisi_sas_stt);
4013
4014         debugfs_remove(hisi_sas_debugfs_dir);
4015 }
4016
4017 module_init(hisi_sas_init);
4018 module_exit(hisi_sas_exit);
4019
4020 MODULE_LICENSE("GPL");
4021 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
4022 MODULE_DESCRIPTION("HISILICON SAS controller driver");
4023 MODULE_ALIAS("platform:" DRV_NAME);