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_softreset_ata_disk(struct domain_device *device);
  14 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
  15                                 void *funcdata);
  16 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
  17                                   struct domain_device *device);
  18 static void hisi_sas_dev_gone(struct domain_device *device);
  19
  20 struct hisi_sas_internal_abort_data {
  21         bool rst_ha_timeout; /* reset the HA for timeout */
  22 };
  23
  24 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
  25 {
  26         switch (fis->command) {
  27         case ATA_CMD_FPDMA_WRITE:
  28         case ATA_CMD_FPDMA_READ:
  29         case ATA_CMD_FPDMA_RECV:
  30         case ATA_CMD_FPDMA_SEND:
  31         case ATA_CMD_NCQ_NON_DATA:
  32                 return HISI_SAS_SATA_PROTOCOL_FPDMA;
  33
  34         case ATA_CMD_DOWNLOAD_MICRO:
  35         case ATA_CMD_ID_ATA:
  36         case ATA_CMD_PMP_READ:
  37         case ATA_CMD_READ_LOG_EXT:
  38         case ATA_CMD_PIO_READ:
  39         case ATA_CMD_PIO_READ_EXT:
  40         case ATA_CMD_PMP_WRITE:
  41         case ATA_CMD_WRITE_LOG_EXT:
  42         case ATA_CMD_PIO_WRITE:
  43         case ATA_CMD_PIO_WRITE_EXT:
  44                 return HISI_SAS_SATA_PROTOCOL_PIO;
  45
  46         case ATA_CMD_DSM:
  47         case ATA_CMD_DOWNLOAD_MICRO_DMA:
  48         case ATA_CMD_PMP_READ_DMA:
  49         case ATA_CMD_PMP_WRITE_DMA:
  50         case ATA_CMD_READ:
  51         case ATA_CMD_READ_EXT:
  52         case ATA_CMD_READ_LOG_DMA_EXT:
  53         case ATA_CMD_READ_STREAM_DMA_EXT:
  54         case ATA_CMD_TRUSTED_RCV_DMA:
  55         case ATA_CMD_TRUSTED_SND_DMA:
  56         case ATA_CMD_WRITE:
  57         case ATA_CMD_WRITE_EXT:
  58         case ATA_CMD_WRITE_FUA_EXT:
  59         case ATA_CMD_WRITE_QUEUED:
  60         case ATA_CMD_WRITE_LOG_DMA_EXT:
  61         case ATA_CMD_WRITE_STREAM_DMA_EXT:
  62         case ATA_CMD_ZAC_MGMT_IN:
  63                 return HISI_SAS_SATA_PROTOCOL_DMA;
  64
  65         case ATA_CMD_CHK_POWER:
  66         case ATA_CMD_DEV_RESET:
  67         case ATA_CMD_EDD:
  68         case ATA_CMD_FLUSH:
  69         case ATA_CMD_FLUSH_EXT:
  70         case ATA_CMD_VERIFY:
  71         case ATA_CMD_VERIFY_EXT:
  72         case ATA_CMD_SET_FEATURES:
  73         case ATA_CMD_STANDBY:
  74         case ATA_CMD_STANDBYNOW1:
  75         case ATA_CMD_ZAC_MGMT_OUT:
  76                 return HISI_SAS_SATA_PROTOCOL_NONDATA;
  77
  78         case ATA_CMD_SET_MAX:
  79                 switch (fis->features) {
  80                 case ATA_SET_MAX_PASSWD:
  81                 case ATA_SET_MAX_LOCK:
  82                         return HISI_SAS_SATA_PROTOCOL_PIO;
  83
  84                 case ATA_SET_MAX_PASSWD_DMA:
  85                 case ATA_SET_MAX_UNLOCK_DMA:
  86                         return HISI_SAS_SATA_PROTOCOL_DMA;
  87
  88                 default:
  89                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  90                 }
  91
  92         default:
  93         {
  94                 if (direction == DMA_NONE)
  95                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  96                 return HISI_SAS_SATA_PROTOCOL_PIO;
  97         }
  98         }
  99 }
 100 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
 101
 102 void hisi_sas_sata_done(struct sas_task *task,
 103                             struct hisi_sas_slot *slot)
 104 {
 105         struct task_status_struct *ts = &task->task_status;
 106         struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
 107         struct hisi_sas_status_buffer *status_buf =
 108                         hisi_sas_status_buf_addr_mem(slot);
 109         u8 *iu = &status_buf->iu[0];
 110         struct dev_to_host_fis *d2h =  (struct dev_to_host_fis *)iu;
 111
 112         resp->frame_len = sizeof(struct dev_to_host_fis);
 113         memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
 114
 115         ts->buf_valid_size = sizeof(*resp);
 116 }
 117 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
 118
 119 /*
 120  * This function assumes linkrate mask fits in 8 bits, which it
 121  * does for all HW versions supported.
 122  */
 123 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
 124 {
 125         u8 rate = 0;
 126         int i;
 127
 128         max -= SAS_LINK_RATE_1_5_GBPS;
 129         for (i = 0; i <= max; i++)
 130                 rate |= 1 << (i * 2);
 131         return rate;
 132 }
 133 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
 134
 135 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
 136 {
 137         return device->port->ha->lldd_ha;
 138 }
 139
 140 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
 141 {
 142         return container_of(sas_port, struct hisi_sas_port, sas_port);
 143 }
 144 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
 145
 146 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
 147 {
 148         int phy_no;
 149
 150         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
 151                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
 152 }
 153 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
 154
 155 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
 156 {
 157         void *bitmap = hisi_hba->slot_index_tags;
 158
 159         __clear_bit(slot_idx, bitmap);
 160 }
 161
 162 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
 163 {
 164         if (hisi_hba->hw->slot_index_alloc ||
 165             slot_idx < HISI_SAS_RESERVED_IPTT) {
 166                 spin_lock(&hisi_hba->lock);
 167                 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
 168                 spin_unlock(&hisi_hba->lock);
 169         }
 170 }
 171
 172 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
 173 {
 174         void *bitmap = hisi_hba->slot_index_tags;
 175
 176         __set_bit(slot_idx, bitmap);
 177 }
 178
 179 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
 180                                      struct request *rq)
 181 {
 182         int index;
 183         void *bitmap = hisi_hba->slot_index_tags;
 184
 185         if (rq)
 186                 return rq->tag + HISI_SAS_RESERVED_IPTT;
 187
 188         spin_lock(&hisi_hba->lock);
 189         index = find_next_zero_bit(bitmap, HISI_SAS_RESERVED_IPTT,
 190                                    hisi_hba->last_slot_index + 1);
 191         if (index >= HISI_SAS_RESERVED_IPTT) {
 192                 index = find_next_zero_bit(bitmap,
 193                                 HISI_SAS_RESERVED_IPTT,
 194                                 0);
 195                 if (index >= HISI_SAS_RESERVED_IPTT) {
 196                         spin_unlock(&hisi_hba->lock);
 197                         return -SAS_QUEUE_FULL;
 198                 }
 199         }
 200         hisi_sas_slot_index_set(hisi_hba, index);
 201         hisi_hba->last_slot_index = index;
 202         spin_unlock(&hisi_hba->lock);
 203
 204         return index;
 205 }
 206
 207 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
 208                              struct hisi_sas_slot *slot, bool need_lock)
 209 {
 210         int device_id = slot->device_id;
 211         struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
 212
 213         if (task) {
 214                 struct device *dev = hisi_hba->dev;
 215
 216                 if (!task->lldd_task)
 217                         return;
 218
 219                 task->lldd_task = NULL;
 220
 221                 if (!sas_protocol_ata(task->task_proto)) {
 222                         if (slot->n_elem) {
 223                                 if (task->task_proto & SAS_PROTOCOL_SSP)
 224                                         dma_unmap_sg(dev, task->scatter,
 225                                                      task->num_scatter,
 226                                                      task->data_dir);
 227                                 else
 228                                         dma_unmap_sg(dev, &task->smp_task.smp_req,
 229                                                      1, DMA_TO_DEVICE);
 230                         }
 231                         if (slot->n_elem_dif) {
 232                                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 233                                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 234
 235                                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 236                                              scsi_prot_sg_count(scsi_cmnd),
 237                                              task->data_dir);
 238                         }
 239                 }
 240         }
 241
 242         if (need_lock) {
 243                 spin_lock(&sas_dev->lock);
 244                 list_del_init(&slot->entry);
 245                 spin_unlock(&sas_dev->lock);
 246         } else {
 247                 list_del_init(&slot->entry);
 248         }
 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 {
 277         hisi_hba->hw->prep_abort(hisi_hba, slot);
 278 }
 279
 280 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
 281                                struct sas_task *task, int n_elem)
 282 {
 283         struct device *dev = hisi_hba->dev;
 284
 285         if (!sas_protocol_ata(task->task_proto) && n_elem) {
 286                 if (task->num_scatter) {
 287                         dma_unmap_sg(dev, task->scatter, task->num_scatter,
 288                                      task->data_dir);
 289                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 290                         dma_unmap_sg(dev, &task->smp_task.smp_req,
 291                                      1, DMA_TO_DEVICE);
 292                 }
 293         }
 294 }
 295
 296 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
 297                             struct sas_task *task, int *n_elem)
 298 {
 299         struct device *dev = hisi_hba->dev;
 300         int rc;
 301
 302         if (sas_protocol_ata(task->task_proto)) {
 303                 *n_elem = task->num_scatter;
 304         } else {
 305                 unsigned int req_len;
 306
 307                 if (task->num_scatter) {
 308                         *n_elem = dma_map_sg(dev, task->scatter,
 309                                              task->num_scatter, task->data_dir);
 310                         if (!*n_elem) {
 311                                 rc = -ENOMEM;
 312                                 goto prep_out;
 313                         }
 314                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 315                         *n_elem = dma_map_sg(dev, &task->smp_task.smp_req,
 316                                              1, DMA_TO_DEVICE);
 317                         if (!*n_elem) {
 318                                 rc = -ENOMEM;
 319                                 goto prep_out;
 320                         }
 321                         req_len = sg_dma_len(&task->smp_task.smp_req);
 322                         if (req_len & 0x3) {
 323                                 rc = -EINVAL;
 324                                 goto err_out_dma_unmap;
 325                         }
 326                 }
 327         }
 328
 329         if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
 330                 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
 331                         *n_elem);
 332                 rc = -EINVAL;
 333                 goto err_out_dma_unmap;
 334         }
 335         return 0;
 336
 337 err_out_dma_unmap:
 338         /* It would be better to call dma_unmap_sg() here, but it's messy */
 339         hisi_sas_dma_unmap(hisi_hba, task, *n_elem);
 340 prep_out:
 341         return rc;
 342 }
 343
 344 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
 345                                    struct sas_task *task, int n_elem_dif)
 346 {
 347         struct device *dev = hisi_hba->dev;
 348
 349         if (n_elem_dif) {
 350                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 351                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 352
 353                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 354                              scsi_prot_sg_count(scsi_cmnd),
 355                              task->data_dir);
 356         }
 357 }
 358
 359 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
 360                                 int *n_elem_dif, struct sas_task *task)
 361 {
 362         struct device *dev = hisi_hba->dev;
 363         struct sas_ssp_task *ssp_task;
 364         struct scsi_cmnd *scsi_cmnd;
 365         int rc;
 366
 367         if (task->num_scatter) {
 368                 ssp_task = &task->ssp_task;
 369                 scsi_cmnd = ssp_task->cmd;
 370
 371                 if (scsi_prot_sg_count(scsi_cmnd)) {
 372                         *n_elem_dif = dma_map_sg(dev,
 373                                                  scsi_prot_sglist(scsi_cmnd),
 374                                                  scsi_prot_sg_count(scsi_cmnd),
 375                                                  task->data_dir);
 376
 377                         if (!*n_elem_dif)
 378                                 return -ENOMEM;
 379
 380                         if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
 381                                 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
 382                                         *n_elem_dif);
 383                                 rc = -EINVAL;
 384                                 goto err_out_dif_dma_unmap;
 385                         }
 386                 }
 387         }
 388
 389         return 0;
 390
 391 err_out_dif_dma_unmap:
 392         dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 393                      scsi_prot_sg_count(scsi_cmnd), task->data_dir);
 394         return rc;
 395 }
 396
 397 static
 398 void hisi_sas_task_deliver(struct hisi_hba *hisi_hba,
 399                            struct hisi_sas_slot *slot,
 400                            struct hisi_sas_dq *dq,
 401                            struct hisi_sas_device *sas_dev)
 402 {
 403         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 404         int dlvry_queue_slot, dlvry_queue;
 405         struct sas_task *task = slot->task;
 406         int wr_q_index;
 407
 408         spin_lock(&dq->lock);
 409         wr_q_index = dq->wr_point;
 410         dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
 411         list_add_tail(&slot->delivery, &dq->list);
 412         spin_unlock(&dq->lock);
 413         spin_lock(&sas_dev->lock);
 414         list_add_tail(&slot->entry, &sas_dev->list);
 415         spin_unlock(&sas_dev->lock);
 416
 417         dlvry_queue = dq->id;
 418         dlvry_queue_slot = wr_q_index;
 419
 420         slot->device_id = sas_dev->device_id;
 421         slot->dlvry_queue = dlvry_queue;
 422         slot->dlvry_queue_slot = dlvry_queue_slot;
 423         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 424         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 425
 426         task->lldd_task = slot;
 427
 428         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 429         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
 430         memset(hisi_sas_status_buf_addr_mem(slot), 0,
 431                sizeof(struct hisi_sas_err_record));
 432
 433         switch (task->task_proto) {
 434         case SAS_PROTOCOL_SMP:
 435                 hisi_sas_task_prep_smp(hisi_hba, slot);
 436                 break;
 437         case SAS_PROTOCOL_SSP:
 438                 hisi_sas_task_prep_ssp(hisi_hba, slot);
 439                 break;
 440         case SAS_PROTOCOL_SATA:
 441         case SAS_PROTOCOL_STP:
 442         case SAS_PROTOCOL_STP_ALL:
 443                 hisi_sas_task_prep_ata(hisi_hba, slot);
 444                 break;
 445         case SAS_PROTOCOL_INTERNAL_ABORT:
 446                 hisi_sas_task_prep_abort(hisi_hba, slot);
 447                 break;
 448         default:
 449                 return;
 450         }
 451
 452         /* Make slot memories observable before marking as ready */
 453         smp_wmb();
 454         WRITE_ONCE(slot->ready, 1);
 455
 456         spin_lock(&dq->lock);
 457         hisi_hba->hw->start_delivery(dq);
 458         spin_unlock(&dq->lock);
 459 }
 460
 461 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
 462 {
 463         int n_elem = 0, n_elem_dif = 0;
 464         struct domain_device *device = task->dev;
 465         struct asd_sas_port *sas_port = device->port;
 466         struct hisi_sas_device *sas_dev = device->lldd_dev;
 467         bool internal_abort = sas_is_internal_abort(task);
 468         struct hisi_sas_dq *dq = NULL;
 469         struct hisi_sas_port *port;
 470         struct hisi_hba *hisi_hba;
 471         struct hisi_sas_slot *slot;
 472         struct request *rq = NULL;
 473         struct device *dev;
 474         int rc;
 475
 476         if (!sas_port) {
 477                 struct task_status_struct *ts = &task->task_status;
 478
 479                 ts->resp = SAS_TASK_UNDELIVERED;
 480                 ts->stat = SAS_PHY_DOWN;
 481                 /*
 482                  * libsas will use dev->port, should
 483                  * not call task_done for sata
 484                  */
 485                 if (device->dev_type != SAS_SATA_DEV && !internal_abort)
 486                         task->task_done(task);
 487                 return -ECOMM;
 488         }
 489
 490         hisi_hba = dev_to_hisi_hba(device);
 491         dev = hisi_hba->dev;
 492
 493         switch (task->task_proto) {
 494         case SAS_PROTOCOL_SSP:
 495         case SAS_PROTOCOL_SMP:
 496         case SAS_PROTOCOL_SATA:
 497         case SAS_PROTOCOL_STP:
 498         case SAS_PROTOCOL_STP_ALL:
 499                 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
 500                         if (!gfpflags_allow_blocking(gfp_flags))
 501                                 return -EINVAL;
 502
 503                         down(&hisi_hba->sem);
 504                         up(&hisi_hba->sem);
 505                 }
 506
 507                 if (DEV_IS_GONE(sas_dev)) {
 508                         if (sas_dev)
 509                                 dev_info(dev, "task prep: device %d not ready\n",
 510                                          sas_dev->device_id);
 511                         else
 512                                 dev_info(dev, "task prep: device %016llx not ready\n",
 513                                          SAS_ADDR(device->sas_addr));
 514
 515                         return -ECOMM;
 516                 }
 517
 518                 port = to_hisi_sas_port(sas_port);
 519                 if (!port->port_attached) {
 520                         dev_info(dev, "task prep: %s port%d not attach device\n",
 521                                  dev_is_sata(device) ? "SATA/STP" : "SAS",
 522                                  device->port->id);
 523
 524                                 return -ECOMM;
 525                 }
 526
 527                 rq = sas_task_find_rq(task);
 528                 if (rq) {
 529                         unsigned int dq_index;
 530                         u32 blk_tag;
 531
 532                         blk_tag = blk_mq_unique_tag(rq);
 533                         dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
 534                         dq = &hisi_hba->dq[dq_index];
 535                 } else {
 536                         int queue;
 537
 538                         if (hisi_hba->iopoll_q_cnt) {
 539                                 /*
 540                                  * Use interrupt queue (queue 0) to deliver and complete
 541                                  * internal IOs of libsas or libata when there is at least
 542                                  * one iopoll queue
 543                                  */
 544                                 queue = 0;
 545                         } else {
 546                                 struct Scsi_Host *shost = hisi_hba->shost;
 547                                 struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
 548
 549                                 queue = qmap->mq_map[raw_smp_processor_id()];
 550                         }
 551                         dq = &hisi_hba->dq[queue];
 552                 }
 553                 break;
 554         case SAS_PROTOCOL_INTERNAL_ABORT:
 555                 if (!hisi_hba->hw->prep_abort)
 556                         return TMF_RESP_FUNC_FAILED;
 557
 558                 if (test_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags))
 559                         return -EIO;
 560
 561                 hisi_hba = dev_to_hisi_hba(device);
 562
 563                 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
 564                         return -EINVAL;
 565
 566                 port = to_hisi_sas_port(sas_port);
 567                 dq = &hisi_hba->dq[task->abort_task.qid];
 568                 break;
 569         default:
 570                 dev_err(hisi_hba->dev, "task prep: unknown/unsupported proto (0x%x)\n",
 571                         task->task_proto);
 572                 return -EINVAL;
 573         }
 574
 575         rc = hisi_sas_dma_map(hisi_hba, task, &n_elem);
 576         if (rc < 0)
 577                 goto prep_out;
 578
 579         if (!sas_protocol_ata(task->task_proto)) {
 580                 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
 581                 if (rc < 0)
 582                         goto err_out_dma_unmap;
 583         }
 584
 585         if (!internal_abort && hisi_hba->hw->slot_index_alloc)
 586                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
 587         else
 588                 rc = hisi_sas_slot_index_alloc(hisi_hba, rq);
 589
 590         if (rc < 0)
 591                 goto err_out_dif_dma_unmap;
 592
 593         slot = &hisi_hba->slot_info[rc];
 594         slot->n_elem = n_elem;
 595         slot->n_elem_dif = n_elem_dif;
 596         slot->task = task;
 597         slot->port = port;
 598
 599         slot->tmf = task->tmf;
 600         slot->is_internal = !!task->tmf || internal_abort;
 601
 602         /* protect task_prep and start_delivery sequence */
 603         hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev);
 604
 605         return 0;
 606
 607 err_out_dif_dma_unmap:
 608         if (!sas_protocol_ata(task->task_proto))
 609                 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
 610 err_out_dma_unmap:
 611         hisi_sas_dma_unmap(hisi_hba, task, n_elem);
 612 prep_out:
 613         dev_err(dev, "task exec: failed[%d]!\n", rc);
 614         return rc;
 615 }
 616
 617 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no,
 618                                  gfp_t gfp_flags)
 619 {
 620         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 621         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 622
 623         if (!phy->phy_attached)
 624                 return;
 625
 626         sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
 627
 628         if (sas_phy->phy) {
 629                 struct sas_phy *sphy = sas_phy->phy;
 630
 631                 sphy->negotiated_linkrate = sas_phy->linkrate;
 632                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 633                 sphy->maximum_linkrate_hw =
 634                         hisi_hba->hw->phy_get_max_linkrate();
 635                 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
 636                         sphy->minimum_linkrate = phy->minimum_linkrate;
 637
 638                 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
 639                         sphy->maximum_linkrate = phy->maximum_linkrate;
 640         }
 641
 642         if (phy->phy_type & PORT_TYPE_SAS) {
 643                 struct sas_identify_frame *id;
 644
 645                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 646                 id->dev_type = phy->identify.device_type;
 647                 id->initiator_bits = SAS_PROTOCOL_ALL;
 648                 id->target_bits = phy->identify.target_port_protocols;
 649         } else if (phy->phy_type & PORT_TYPE_SATA) {
 650                 /* Nothing */
 651         }
 652
 653         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 654         sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
 655 }
 656
 657 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 658 {
 659         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 660         struct hisi_sas_device *sas_dev = NULL;
 661         int last = hisi_hba->last_dev_id;
 662         int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
 663         int i;
 664
 665         spin_lock(&hisi_hba->lock);
 666         for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
 667                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 668                         int queue = i % hisi_hba->queue_count;
 669                         struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
 670
 671                         hisi_hba->devices[i].device_id = i;
 672                         sas_dev = &hisi_hba->devices[i];
 673                         sas_dev->dev_status = HISI_SAS_DEV_INIT;
 674                         sas_dev->dev_type = device->dev_type;
 675                         sas_dev->hisi_hba = hisi_hba;
 676                         sas_dev->sas_device = device;
 677                         sas_dev->dq = dq;
 678                         spin_lock_init(&sas_dev->lock);
 679                         INIT_LIST_HEAD(&hisi_hba->devices[i].list);
 680                         break;
 681                 }
 682                 i++;
 683         }
 684         hisi_hba->last_dev_id = i;
 685         spin_unlock(&hisi_hba->lock);
 686
 687         return sas_dev;
 688 }
 689
 690 static void hisi_sas_sync_poll_cq(struct hisi_sas_cq *cq)
 691 {
 692         /* make sure CQ entries being processed are processed to completion */
 693         spin_lock(&cq->poll_lock);
 694         spin_unlock(&cq->poll_lock);
 695 }
 696
 697 static bool hisi_sas_queue_is_poll(struct hisi_sas_cq *cq)
 698 {
 699         struct hisi_hba *hisi_hba = cq->hisi_hba;
 700
 701         if (cq->id < hisi_hba->queue_count - hisi_hba->iopoll_q_cnt)
 702                 return false;
 703         return true;
 704 }
 705
 706 static void hisi_sas_sync_cq(struct hisi_sas_cq *cq)
 707 {
 708         if (hisi_sas_queue_is_poll(cq))
 709                 hisi_sas_sync_poll_cq(cq);
 710         else
 711                 synchronize_irq(cq->irq_no);
 712 }
 713
 714 void hisi_sas_sync_poll_cqs(struct hisi_hba *hisi_hba)
 715 {
 716         int i;
 717
 718         for (i = 0; i < hisi_hba->queue_count; i++) {
 719                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
 720
 721                 if (hisi_sas_queue_is_poll(cq))
 722                         hisi_sas_sync_poll_cq(cq);
 723         }
 724 }
 725 EXPORT_SYMBOL_GPL(hisi_sas_sync_poll_cqs);
 726
 727 void hisi_sas_sync_cqs(struct hisi_hba *hisi_hba)
 728 {
 729         int i;
 730
 731         for (i = 0; i < hisi_hba->queue_count; i++) {
 732                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
 733
 734                 hisi_sas_sync_cq(cq);
 735         }
 736 }
 737 EXPORT_SYMBOL_GPL(hisi_sas_sync_cqs);
 738
 739 static void hisi_sas_tmf_aborted(struct sas_task *task)
 740 {
 741         struct hisi_sas_slot *slot = task->lldd_task;
 742         struct domain_device *device = task->dev;
 743         struct hisi_sas_device *sas_dev = device->lldd_dev;
 744         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
 745
 746         if (slot) {
 747                 struct hisi_sas_cq *cq =
 748                            &hisi_hba->cq[slot->dlvry_queue];
 749                 /*
 750                  * sync irq or poll queue to avoid free'ing task
 751                  * before using task in IO completion
 752                  */
 753                 hisi_sas_sync_cq(cq);
 754                 slot->task = NULL;
 755         }
 756 }
 757
 758 #define HISI_SAS_DISK_RECOVER_CNT 3
 759 static int hisi_sas_init_device(struct domain_device *device)
 760 {
 761         int rc = TMF_RESP_FUNC_COMPLETE;
 762         struct scsi_lun lun;
 763         int retry = HISI_SAS_DISK_RECOVER_CNT;
 764         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 765
 766         switch (device->dev_type) {
 767         case SAS_END_DEVICE:
 768                 int_to_scsilun(0, &lun);
 769
 770                 while (retry-- > 0) {
 771                         rc = sas_abort_task_set(device, lun.scsi_lun);
 772                         if (rc == TMF_RESP_FUNC_COMPLETE) {
 773                                 hisi_sas_release_task(hisi_hba, device);
 774                                 break;
 775                         }
 776                 }
 777                 break;
 778         case SAS_SATA_DEV:
 779         case SAS_SATA_PM:
 780         case SAS_SATA_PM_PORT:
 781         case SAS_SATA_PENDING:
 782                 /*
 783                  * If an expander is swapped when a SATA disk is attached then
 784                  * we should issue a hard reset to clear previous affiliation
 785                  * of STP target port, see SPL (chapter 6.19.4).
 786                  *
 787                  * However we don't need to issue a hard reset here for these
 788                  * reasons:
 789                  * a. When probing the device, libsas/libata already issues a
 790                  * hard reset in sas_probe_sata() -> ata_sas_async_probe().
 791                  * Note that in hisi_sas_debug_I_T_nexus_reset() we take care
 792                  * to issue a hard reset by checking the dev status (== INIT).
 793                  * b. When resetting the controller, this is simply unnecessary.
 794                  */
 795                 while (retry-- > 0) {
 796                         rc = hisi_sas_softreset_ata_disk(device);
 797                         if (!rc)
 798                                 break;
 799                 }
 800                 break;
 801         default:
 802                 break;
 803         }
 804
 805         return rc;
 806 }
 807
 808 int hisi_sas_slave_alloc(struct scsi_device *sdev)
 809 {
 810         struct domain_device *ddev = sdev_to_domain_dev(sdev);
 811         struct hisi_sas_device *sas_dev = ddev->lldd_dev;
 812         int rc;
 813
 814         rc = sas_slave_alloc(sdev);
 815         if (rc)
 816                 return rc;
 817
 818         rc = hisi_sas_init_device(ddev);
 819         if (rc)
 820                 return rc;
 821         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 822         return 0;
 823 }
 824 EXPORT_SYMBOL_GPL(hisi_sas_slave_alloc);
 825
 826 static int hisi_sas_dev_found(struct domain_device *device)
 827 {
 828         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 829         struct domain_device *parent_dev = device->parent;
 830         struct hisi_sas_device *sas_dev;
 831         struct device *dev = hisi_hba->dev;
 832         int rc;
 833
 834         if (hisi_hba->hw->alloc_dev)
 835                 sas_dev = hisi_hba->hw->alloc_dev(device);
 836         else
 837                 sas_dev = hisi_sas_alloc_dev(device);
 838         if (!sas_dev) {
 839                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 840                         HISI_SAS_MAX_DEVICES);
 841                 return -EINVAL;
 842         }
 843
 844         device->lldd_dev = sas_dev;
 845         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 846
 847         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 848                 int phy_no;
 849
 850                 phy_no = sas_find_attached_phy_id(&parent_dev->ex_dev, device);
 851                 if (phy_no < 0) {
 852                         dev_info(dev, "dev found: no attached "
 853                                  "dev:%016llx at ex:%016llx\n",
 854                                  SAS_ADDR(device->sas_addr),
 855                                  SAS_ADDR(parent_dev->sas_addr));
 856                         rc = phy_no;
 857                         goto err_out;
 858                 }
 859         }
 860
 861         dev_info(dev, "dev[%d:%x] found\n",
 862                 sas_dev->device_id, sas_dev->dev_type);
 863
 864         return 0;
 865
 866 err_out:
 867         hisi_sas_dev_gone(device);
 868         return rc;
 869 }
 870
 871 int hisi_sas_slave_configure(struct scsi_device *sdev)
 872 {
 873         struct domain_device *dev = sdev_to_domain_dev(sdev);
 874         int ret = sas_slave_configure(sdev);
 875
 876         if (ret)
 877                 return ret;
 878         if (!dev_is_sata(dev))
 879                 sas_change_queue_depth(sdev, 64);
 880
 881         return 0;
 882 }
 883 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
 884
 885 void hisi_sas_scan_start(struct Scsi_Host *shost)
 886 {
 887         struct hisi_hba *hisi_hba = shost_priv(shost);
 888
 889         hisi_hba->hw->phys_init(hisi_hba);
 890 }
 891 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
 892
 893 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 894 {
 895         struct hisi_hba *hisi_hba = shost_priv(shost);
 896         struct sas_ha_struct *sha = &hisi_hba->sha;
 897
 898         /* Wait for PHY up interrupt to occur */
 899         if (time < HZ)
 900                 return 0;
 901
 902         sas_drain_work(sha);
 903         return 1;
 904 }
 905 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
 906
 907 static void hisi_sas_phyup_work_common(struct work_struct *work,
 908                 enum hisi_sas_phy_event event)
 909 {
 910         struct hisi_sas_phy *phy =
 911                 container_of(work, typeof(*phy), works[event]);
 912         struct hisi_hba *hisi_hba = phy->hisi_hba;
 913         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 914         int phy_no = sas_phy->id;
 915
 916         phy->wait_phyup_cnt = 0;
 917         if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
 918                 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
 919         hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
 920 }
 921
 922 static void hisi_sas_phyup_work(struct work_struct *work)
 923 {
 924         hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);
 925 }
 926
 927 static void hisi_sas_linkreset_work(struct work_struct *work)
 928 {
 929         struct hisi_sas_phy *phy =
 930                 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
 931         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 932
 933         hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
 934 }
 935
 936 static void hisi_sas_phyup_pm_work(struct work_struct *work)
 937 {
 938         struct hisi_sas_phy *phy =
 939                 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);
 940         struct hisi_hba *hisi_hba = phy->hisi_hba;
 941         struct device *dev = hisi_hba->dev;
 942
 943         hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);
 944         pm_runtime_put_sync(dev);
 945 }
 946
 947 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
 948         [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
 949         [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
 950         [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,
 951 };
 952
 953 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
 954                                 enum hisi_sas_phy_event event)
 955 {
 956         struct hisi_hba *hisi_hba = phy->hisi_hba;
 957
 958         if (WARN_ON(event >= HISI_PHYES_NUM))
 959                 return false;
 960
 961         return queue_work(hisi_hba->wq, &phy->works[event]);
 962 }
 963 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
 964
 965 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
 966 {
 967         struct hisi_sas_phy *phy = from_timer(phy, t, timer);
 968         struct hisi_hba *hisi_hba = phy->hisi_hba;
 969         struct device *dev = hisi_hba->dev;
 970         int phy_no = phy->sas_phy.id;
 971
 972         dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
 973         hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
 974 }
 975
 976 #define HISI_SAS_WAIT_PHYUP_RETRIES     10
 977
 978 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
 979 {
 980         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 981         struct device *dev = hisi_hba->dev;
 982         unsigned long flags;
 983
 984         dev_dbg(dev, "phy%d OOB ready\n", phy_no);
 985         spin_lock_irqsave(&phy->lock, flags);
 986         if (phy->phy_attached) {
 987                 spin_unlock_irqrestore(&phy->lock, flags);
 988                 return;
 989         }
 990
 991         if (!timer_pending(&phy->timer)) {
 992                 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
 993                         phy->wait_phyup_cnt++;
 994                         phy->timer.expires = jiffies +
 995                                              HISI_SAS_WAIT_PHYUP_TIMEOUT;
 996                         add_timer(&phy->timer);
 997                         spin_unlock_irqrestore(&phy->lock, flags);
 998                         return;
 999                 }
1000
1001                 dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
1002                          phy_no, phy->wait_phyup_cnt);
1003                 phy->wait_phyup_cnt = 0;
1004         }
1005         spin_unlock_irqrestore(&phy->lock, flags);
1006 }
1007
1008 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
1009
1010 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
1011 {
1012         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1013         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1014         int i;
1015
1016         phy->hisi_hba = hisi_hba;
1017         phy->port = NULL;
1018         phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
1019         phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
1020         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
1021         sas_phy->iproto = SAS_PROTOCOL_ALL;
1022         sas_phy->tproto = 0;
1023         sas_phy->role = PHY_ROLE_INITIATOR;
1024         sas_phy->oob_mode = OOB_NOT_CONNECTED;
1025         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
1026         sas_phy->id = phy_no;
1027         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
1028         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
1029         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
1030         sas_phy->lldd_phy = phy;
1031
1032         for (i = 0; i < HISI_PHYES_NUM; i++)
1033                 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
1034
1035         spin_lock_init(&phy->lock);
1036
1037         timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
1038 }
1039
1040 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
1041 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
1042 {
1043         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1044         struct asd_sas_phy *aphy = &phy->sas_phy;
1045         struct sas_phy *sphy = aphy->phy;
1046         unsigned long flags;
1047
1048         spin_lock_irqsave(&phy->lock, flags);
1049
1050         if (enable) {
1051                 /* We may have been enabled already; if so, don't touch */
1052                 if (!phy->enable)
1053                         sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
1054                 hisi_hba->hw->phy_start(hisi_hba, phy_no);
1055         } else {
1056                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
1057                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1058         }
1059         phy->enable = enable;
1060         spin_unlock_irqrestore(&phy->lock, flags);
1061 }
1062 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
1063
1064 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
1065 {
1066         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1067         struct asd_sas_port *sas_port = sas_phy->port;
1068         struct hisi_sas_port *port;
1069
1070         if (!sas_port)
1071                 return;
1072
1073         port = to_hisi_sas_port(sas_port);
1074         port->port_attached = 1;
1075         port->id = phy->port_id;
1076         phy->port = port;
1077         sas_port->lldd_port = port;
1078 }
1079
1080 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1081                                      struct hisi_sas_slot *slot, bool need_lock)
1082 {
1083         if (task) {
1084                 unsigned long flags;
1085                 struct task_status_struct *ts;
1086
1087                 ts = &task->task_status;
1088
1089                 ts->resp = SAS_TASK_COMPLETE;
1090                 ts->stat = SAS_ABORTED_TASK;
1091                 spin_lock_irqsave(&task->task_state_lock, flags);
1092                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1093                 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1094                         task->task_state_flags |= SAS_TASK_STATE_DONE;
1095                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1096         }
1097
1098         hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock);
1099 }
1100
1101 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1102                         struct domain_device *device)
1103 {
1104         struct hisi_sas_slot *slot, *slot2;
1105         struct hisi_sas_device *sas_dev = device->lldd_dev;
1106
1107         spin_lock(&sas_dev->lock);
1108         list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1109                 hisi_sas_do_release_task(hisi_hba, slot->task, slot, false);
1110
1111         spin_unlock(&sas_dev->lock);
1112 }
1113
1114 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1115 {
1116         struct hisi_sas_device *sas_dev;
1117         struct domain_device *device;
1118         int i;
1119
1120         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1121                 sas_dev = &hisi_hba->devices[i];
1122                 device = sas_dev->sas_device;
1123
1124                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1125                     !device)
1126                         continue;
1127
1128                 hisi_sas_release_task(hisi_hba, device);
1129         }
1130 }
1131 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1132
1133 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1134                                 struct domain_device *device)
1135 {
1136         if (hisi_hba->hw->dereg_device)
1137                 hisi_hba->hw->dereg_device(hisi_hba, device);
1138 }
1139
1140 static int
1141 hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev,
1142                                  bool rst_ha_timeout)
1143 {
1144         struct hisi_sas_internal_abort_data data = { rst_ha_timeout };
1145         struct domain_device *device = sas_dev->sas_device;
1146         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1147         int i, rc;
1148
1149         for (i = 0; i < hisi_hba->cq_nvecs; i++) {
1150                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1151                 const struct cpumask *mask = cq->irq_mask;
1152
1153                 if (mask && !cpumask_intersects(cpu_online_mask, mask))
1154                         continue;
1155                 rc = sas_execute_internal_abort_dev(device, i, &data);
1156                 if (rc)
1157                         return rc;
1158         }
1159
1160         return 0;
1161 }
1162
1163 static void hisi_sas_dev_gone(struct domain_device *device)
1164 {
1165         struct hisi_sas_device *sas_dev = device->lldd_dev;
1166         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1167         struct device *dev = hisi_hba->dev;
1168         int ret = 0;
1169
1170         dev_info(dev, "dev[%d:%x] is gone\n",
1171                  sas_dev->device_id, sas_dev->dev_type);
1172
1173         down(&hisi_hba->sem);
1174         if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1175                 hisi_sas_internal_task_abort_dev(sas_dev, true);
1176
1177                 hisi_sas_dereg_device(hisi_hba, device);
1178
1179                 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1180                 device->lldd_dev = NULL;
1181         }
1182
1183         if (hisi_hba->hw->free_device)
1184                 hisi_hba->hw->free_device(sas_dev);
1185
1186         /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1187         if (!ret)
1188                 sas_dev->dev_type = SAS_PHY_UNUSED;
1189         sas_dev->sas_device = NULL;
1190         up(&hisi_hba->sem);
1191 }
1192
1193 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1194                         struct sas_phy_linkrates *r)
1195 {
1196         struct sas_phy_linkrates _r;
1197
1198         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1199         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1200         enum sas_linkrate min, max;
1201
1202         if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1203                 return -EINVAL;
1204
1205         if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1206                 max = sas_phy->phy->maximum_linkrate;
1207                 min = r->minimum_linkrate;
1208         } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1209                 max = r->maximum_linkrate;
1210                 min = sas_phy->phy->minimum_linkrate;
1211         } else
1212                 return -EINVAL;
1213
1214         _r.maximum_linkrate = max;
1215         _r.minimum_linkrate = min;
1216
1217         sas_phy->phy->maximum_linkrate = max;
1218         sas_phy->phy->minimum_linkrate = min;
1219
1220         hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1221         msleep(100);
1222         hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1223         hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1224
1225         return 0;
1226 }
1227
1228 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1229                                 void *funcdata)
1230 {
1231         struct hisi_sas_phy *phy = container_of(sas_phy,
1232                         struct hisi_sas_phy, sas_phy);
1233         struct sas_ha_struct *sas_ha = sas_phy->ha;
1234         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1235         struct device *dev = hisi_hba->dev;
1236         DECLARE_COMPLETION_ONSTACK(completion);
1237         int phy_no = sas_phy->id;
1238         u8 sts = phy->phy_attached;
1239         int ret = 0;
1240
1241         down(&hisi_hba->sem);
1242         phy->reset_completion = &completion;
1243
1244         switch (func) {
1245         case PHY_FUNC_HARD_RESET:
1246                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1247                 break;
1248
1249         case PHY_FUNC_LINK_RESET:
1250                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1251                 msleep(100);
1252                 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1253                 break;
1254
1255         case PHY_FUNC_DISABLE:
1256                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1257                 goto out;
1258
1259         case PHY_FUNC_SET_LINK_RATE:
1260                 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1261                 break;
1262
1263         case PHY_FUNC_GET_EVENTS:
1264                 if (hisi_hba->hw->get_events) {
1265                         hisi_hba->hw->get_events(hisi_hba, phy_no);
1266                         goto out;
1267                 }
1268                 fallthrough;
1269         case PHY_FUNC_RELEASE_SPINUP_HOLD:
1270         default:
1271                 ret = -EOPNOTSUPP;
1272                 goto out;
1273         }
1274
1275         if (sts && !wait_for_completion_timeout(&completion,
1276                 HISI_SAS_WAIT_PHYUP_TIMEOUT)) {
1277                 dev_warn(dev, "phy%d wait phyup timed out for func %d\n",
1278                          phy_no, func);
1279                 if (phy->in_reset)
1280                         ret = -ETIMEDOUT;
1281         }
1282
1283 out:
1284         phy->reset_completion = NULL;
1285
1286         up(&hisi_hba->sem);
1287         return ret;
1288 }
1289
1290 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1291                 bool reset, int pmp, u8 *fis)
1292 {
1293         struct ata_taskfile tf;
1294
1295         ata_tf_init(dev, &tf);
1296         if (reset)
1297                 tf.ctl |= ATA_SRST;
1298         else
1299                 tf.ctl &= ~ATA_SRST;
1300         tf.command = ATA_CMD_DEV_RESET;
1301         ata_tf_to_fis(&tf, pmp, 0, fis);
1302 }
1303
1304 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1305 {
1306         u8 fis[20] = {0};
1307         struct ata_port *ap = device->sata_dev.ap;
1308         struct ata_link *link;
1309         int rc = TMF_RESP_FUNC_FAILED;
1310         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1311         struct device *dev = hisi_hba->dev;
1312
1313         ata_for_each_link(link, ap, EDGE) {
1314                 int pmp = sata_srst_pmp(link);
1315
1316                 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1317                 rc = sas_execute_ata_cmd(device, fis, -1);
1318                 if (rc != TMF_RESP_FUNC_COMPLETE)
1319                         break;
1320         }
1321
1322         if (rc == TMF_RESP_FUNC_COMPLETE) {
1323                 ata_for_each_link(link, ap, EDGE) {
1324                         int pmp = sata_srst_pmp(link);
1325
1326                         hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1327                         rc = sas_execute_ata_cmd(device, fis, -1);
1328                         if (rc != TMF_RESP_FUNC_COMPLETE)
1329                                 dev_err(dev, "ata disk %016llx de-reset failed\n",
1330                                         SAS_ADDR(device->sas_addr));
1331                 }
1332         } else {
1333                 dev_err(dev, "ata disk %016llx reset failed\n",
1334                         SAS_ADDR(device->sas_addr));
1335         }
1336
1337         if (rc == TMF_RESP_FUNC_COMPLETE)
1338                 hisi_sas_release_task(hisi_hba, device);
1339
1340         return rc;
1341 }
1342
1343 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1344 {
1345         u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1346         int i;
1347
1348         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1349                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1350                 struct domain_device *device = sas_dev->sas_device;
1351                 struct asd_sas_port *sas_port;
1352                 struct hisi_sas_port *port;
1353                 struct hisi_sas_phy *phy = NULL;
1354                 struct asd_sas_phy *sas_phy;
1355
1356                 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1357                                 || !device || !device->port)
1358                         continue;
1359
1360                 sas_port = device->port;
1361                 port = to_hisi_sas_port(sas_port);
1362
1363                 spin_lock(&sas_port->phy_list_lock);
1364                 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1365                         if (state & BIT(sas_phy->id)) {
1366                                 phy = sas_phy->lldd_phy;
1367                                 break;
1368                         }
1369                 spin_unlock(&sas_port->phy_list_lock);
1370
1371                 if (phy) {
1372                         port->id = phy->port_id;
1373
1374                         /* Update linkrate of directly attached device. */
1375                         if (!device->parent)
1376                                 device->linkrate = phy->sas_phy.linkrate;
1377
1378                         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1379                 } else if (!port->port_attached)
1380                         port->id = 0xff;
1381         }
1382 }
1383
1384 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1385 {
1386         struct asd_sas_port *_sas_port = NULL;
1387         int phy_no;
1388
1389         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1390                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1391                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1392                 struct asd_sas_port *sas_port = sas_phy->port;
1393                 bool do_port_check = _sas_port != sas_port;
1394
1395                 if (!sas_phy->phy->enabled)
1396                         continue;
1397
1398                 /* Report PHY state change to libsas */
1399                 if (state & BIT(phy_no)) {
1400                         if (do_port_check && sas_port && sas_port->port_dev) {
1401                                 struct domain_device *dev = sas_port->port_dev;
1402
1403                                 _sas_port = sas_port;
1404
1405                                 if (dev_is_expander(dev->dev_type))
1406                                         sas_notify_port_event(sas_phy,
1407                                                         PORTE_BROADCAST_RCVD,
1408                                                         GFP_KERNEL);
1409                         }
1410                 } else {
1411                         hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1412                 }
1413         }
1414 }
1415
1416 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1417 {
1418         struct hisi_sas_device *sas_dev;
1419         struct domain_device *device;
1420         int i;
1421
1422         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1423                 sas_dev = &hisi_hba->devices[i];
1424                 device = sas_dev->sas_device;
1425
1426                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1427                         continue;
1428
1429                 hisi_sas_init_device(device);
1430         }
1431 }
1432
1433 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1434                                              struct asd_sas_port *sas_port,
1435                                              struct domain_device *device)
1436 {
1437         struct ata_port *ap = device->sata_dev.ap;
1438         struct device *dev = hisi_hba->dev;
1439         int rc = TMF_RESP_FUNC_FAILED;
1440         struct ata_link *link;
1441         u8 fis[20] = {0};
1442         int i;
1443
1444         for (i = 0; i < hisi_hba->n_phy; i++) {
1445                 if (!(sas_port->phy_mask & BIT(i)))
1446                         continue;
1447
1448                 ata_for_each_link(link, ap, EDGE) {
1449                         int pmp = sata_srst_pmp(link);
1450
1451                         hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1452                         rc = sas_execute_ata_cmd(device, fis, i);
1453                         if (rc != TMF_RESP_FUNC_COMPLETE) {
1454                                 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1455                                         i, rc);
1456                                 break;
1457                         }
1458                 }
1459         }
1460 }
1461
1462 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1463 {
1464         struct device *dev = hisi_hba->dev;
1465         int port_no, rc, i;
1466
1467         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1468                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1469                 struct domain_device *device = sas_dev->sas_device;
1470
1471                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1472                         continue;
1473
1474                 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1475                 if (rc < 0)
1476                         dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1477         }
1478
1479         for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1480                 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1481                 struct asd_sas_port *sas_port = &port->sas_port;
1482                 struct domain_device *port_dev = sas_port->port_dev;
1483                 struct domain_device *device;
1484
1485                 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1486                         continue;
1487
1488                 /* Try to find a SATA device */
1489                 list_for_each_entry(device, &sas_port->dev_list,
1490                                     dev_list_node) {
1491                         if (dev_is_sata(device)) {
1492                                 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1493                                                                  sas_port,
1494                                                                  device);
1495                                 break;
1496                         }
1497                 }
1498         }
1499 }
1500
1501 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1502 {
1503         struct Scsi_Host *shost = hisi_hba->shost;
1504
1505         hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1506
1507         scsi_block_requests(shost);
1508         hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1509
1510         del_timer_sync(&hisi_hba->timer);
1511
1512         set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1513 }
1514 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1515
1516 static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie)
1517 {
1518         struct hisi_sas_phy *phy = data;
1519         struct hisi_hba *hisi_hba = phy->hisi_hba;
1520         struct device *dev = hisi_hba->dev;
1521         DECLARE_COMPLETION_ONSTACK(completion);
1522         int phy_no = phy->sas_phy.id;
1523
1524         phy->reset_completion = &completion;
1525         hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1526         if (!wait_for_completion_timeout(&completion,
1527                                          HISI_SAS_WAIT_PHYUP_TIMEOUT))
1528                 dev_warn(dev, "phy%d wait phyup timed out\n", phy_no);
1529
1530         phy->reset_completion = NULL;
1531 }
1532
1533 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1534 {
1535         struct Scsi_Host *shost = hisi_hba->shost;
1536         ASYNC_DOMAIN_EXCLUSIVE(async);
1537         int phy_no;
1538
1539         /* Init and wait for PHYs to come up and all libsas event finished. */
1540         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1541                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1542
1543                 if (!(hisi_hba->phy_state & BIT(phy_no)))
1544                         continue;
1545
1546                 async_schedule_domain(hisi_sas_async_init_wait_phyup,
1547                                       phy, &async);
1548         }
1549
1550         async_synchronize_full_domain(&async);
1551         hisi_sas_refresh_port_id(hisi_hba);
1552         clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1553
1554         if (hisi_hba->reject_stp_links_msk)
1555                 hisi_sas_terminate_stp_reject(hisi_hba);
1556         hisi_sas_reset_init_all_devices(hisi_hba);
1557         scsi_unblock_requests(shost);
1558         clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1559         up(&hisi_hba->sem);
1560
1561         hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1562 }
1563 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1564
1565 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1566 {
1567         if (!hisi_hba->hw->soft_reset)
1568                 return -1;
1569
1570         down(&hisi_hba->sem);
1571         if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1572                 up(&hisi_hba->sem);
1573                 return -1;
1574         }
1575
1576         if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1577                 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1578
1579         return 0;
1580 }
1581
1582 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1583 {
1584         struct device *dev = hisi_hba->dev;
1585         struct Scsi_Host *shost = hisi_hba->shost;
1586         int rc;
1587
1588         dev_info(dev, "controller resetting...\n");
1589         hisi_sas_controller_reset_prepare(hisi_hba);
1590
1591         rc = hisi_hba->hw->soft_reset(hisi_hba);
1592         if (rc) {
1593                 dev_warn(dev, "controller reset failed (%d)\n", rc);
1594                 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1595                 up(&hisi_hba->sem);
1596                 scsi_unblock_requests(shost);
1597                 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1598                 return rc;
1599         }
1600         clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1601
1602         hisi_sas_controller_reset_done(hisi_hba);
1603         dev_info(dev, "controller reset complete\n");
1604
1605         return 0;
1606 }
1607
1608 static int hisi_sas_abort_task(struct sas_task *task)
1609 {
1610         struct hisi_sas_internal_abort_data internal_abort_data = { false };
1611         struct domain_device *device = task->dev;
1612         struct hisi_sas_device *sas_dev = device->lldd_dev;
1613         struct hisi_sas_slot *slot = task->lldd_task;
1614         struct hisi_hba *hisi_hba;
1615         struct device *dev;
1616         int rc = TMF_RESP_FUNC_FAILED;
1617         unsigned long flags;
1618
1619         if (!sas_dev)
1620                 return TMF_RESP_FUNC_FAILED;
1621
1622         hisi_hba = dev_to_hisi_hba(task->dev);
1623         dev = hisi_hba->dev;
1624
1625         spin_lock_irqsave(&task->task_state_lock, flags);
1626         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1627                 struct hisi_sas_cq *cq;
1628
1629                 if (slot) {
1630                         /*
1631                          * sync irq or poll queue to avoid free'ing task
1632                          * before using task in IO completion
1633                          */
1634                         cq = &hisi_hba->cq[slot->dlvry_queue];
1635                         hisi_sas_sync_cq(cq);
1636                 }
1637                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1638                 rc = TMF_RESP_FUNC_COMPLETE;
1639                 goto out;
1640         }
1641         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1642         spin_unlock_irqrestore(&task->task_state_lock, flags);
1643
1644         if (slot && task->task_proto & SAS_PROTOCOL_SSP) {
1645                 u16 tag = slot->idx;
1646                 int rc2;
1647
1648                 rc = sas_abort_task(task, tag);
1649                 rc2 = sas_execute_internal_abort_single(device, tag,
1650                                 slot->dlvry_queue, &internal_abort_data);
1651                 if (rc2 < 0) {
1652                         dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1653                         return TMF_RESP_FUNC_FAILED;
1654                 }
1655
1656                 /*
1657                  * If the TMF finds that the IO is not in the device and also
1658                  * the internal abort does not succeed, then it is safe to
1659                  * free the slot.
1660                  * Note: if the internal abort succeeds then the slot
1661                  * will have already been completed
1662                  */
1663                 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1664                         if (task->lldd_task)
1665                                 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1666                 }
1667         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1668                 task->task_proto & SAS_PROTOCOL_STP) {
1669                 if (task->dev->dev_type == SAS_SATA_DEV) {
1670                         struct ata_queued_cmd *qc = task->uldd_task;
1671
1672                         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1673                         if (rc < 0) {
1674                                 dev_err(dev, "abort task: internal abort failed\n");
1675                                 goto out;
1676                         }
1677                         hisi_sas_dereg_device(hisi_hba, device);
1678
1679                         /*
1680                          * If an ATA internal command times out in ATA EH, it
1681                          * need to execute soft reset, so check the scsicmd
1682                          */
1683                         if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) &&
1684                             qc && qc->scsicmd) {
1685                                 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1686                                 rc = TMF_RESP_FUNC_COMPLETE;
1687                         } else {
1688                                 rc = hisi_sas_softreset_ata_disk(device);
1689                         }
1690                 }
1691         } else if (slot && task->task_proto & SAS_PROTOCOL_SMP) {
1692                 /* SMP */
1693                 u32 tag = slot->idx;
1694                 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1695
1696                 rc = sas_execute_internal_abort_single(device,
1697                                                        tag, slot->dlvry_queue,
1698                                                        &internal_abort_data);
1699                 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1700                                         task->lldd_task) {
1701                         /*
1702                          * sync irq or poll queue to avoid free'ing task
1703                          * before using task in IO completion
1704                          */
1705                         hisi_sas_sync_cq(cq);
1706                         slot->task = NULL;
1707                 }
1708         }
1709
1710 out:
1711         if (rc != TMF_RESP_FUNC_COMPLETE)
1712                 dev_notice(dev, "abort task: rc=%d\n", rc);
1713         return rc;
1714 }
1715
1716 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1717 {
1718         struct hisi_sas_device *sas_dev = device->lldd_dev;
1719         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1720         struct device *dev = hisi_hba->dev;
1721         int rc;
1722
1723         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1724         if (rc < 0) {
1725                 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1726                 return TMF_RESP_FUNC_FAILED;
1727         }
1728         hisi_sas_dereg_device(hisi_hba, device);
1729
1730         rc = sas_abort_task_set(device, lun);
1731         if (rc == TMF_RESP_FUNC_COMPLETE)
1732                 hisi_sas_release_task(hisi_hba, device);
1733
1734         return rc;
1735 }
1736
1737 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1738 {
1739         struct sas_phy *local_phy = sas_get_local_phy(device);
1740         struct hisi_sas_device *sas_dev = device->lldd_dev;
1741         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1742         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1743         int rc, reset_type;
1744
1745         if (!local_phy->enabled) {
1746                 sas_put_local_phy(local_phy);
1747                 return -ENODEV;
1748         }
1749
1750         if (scsi_is_sas_phy_local(local_phy)) {
1751                 struct asd_sas_phy *sas_phy =
1752                         sas_ha->sas_phy[local_phy->number];
1753                 struct hisi_sas_phy *phy =
1754                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1755                 unsigned long flags;
1756
1757                 spin_lock_irqsave(&phy->lock, flags);
1758                 phy->in_reset = 1;
1759                 spin_unlock_irqrestore(&phy->lock, flags);
1760         }
1761
1762         reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1763                       !dev_is_sata(device)) ? true : false;
1764
1765         rc = sas_phy_reset(local_phy, reset_type);
1766         sas_put_local_phy(local_phy);
1767
1768         if (scsi_is_sas_phy_local(local_phy)) {
1769                 struct asd_sas_phy *sas_phy =
1770                         sas_ha->sas_phy[local_phy->number];
1771                 struct hisi_sas_phy *phy =
1772                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1773                 unsigned long flags;
1774
1775                 spin_lock_irqsave(&phy->lock, flags);
1776                 phy->in_reset = 0;
1777                 spin_unlock_irqrestore(&phy->lock, flags);
1778
1779                 /* report PHY down if timed out */
1780                 if (rc == -ETIMEDOUT)
1781                         hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1782                 return rc;
1783         }
1784
1785         /* Remote phy */
1786         if (rc)
1787                 return rc;
1788
1789         if (dev_is_sata(device)) {
1790                 struct ata_link *link = &device->sata_dev.ap->link;
1791
1792                 rc = ata_wait_after_reset(link, HISI_SAS_WAIT_PHYUP_TIMEOUT,
1793                                           smp_ata_check_ready_type);
1794         } else {
1795                 msleep(2000);
1796         }
1797
1798         return rc;
1799 }
1800
1801 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1802 {
1803         struct hisi_sas_device *sas_dev = device->lldd_dev;
1804         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1805         struct device *dev = hisi_hba->dev;
1806         int rc;
1807
1808         if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
1809                 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1810
1811         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1812         if (rc < 0) {
1813                 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1814                 return TMF_RESP_FUNC_FAILED;
1815         }
1816         hisi_sas_dereg_device(hisi_hba, device);
1817
1818         rc = hisi_sas_debug_I_T_nexus_reset(device);
1819         if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) {
1820                 struct sas_phy *local_phy;
1821
1822                 rc = hisi_sas_softreset_ata_disk(device);
1823                 switch (rc) {
1824                 case -ECOMM:
1825                         rc = -ENODEV;
1826                         break;
1827                 case TMF_RESP_FUNC_FAILED:
1828                 case -EMSGSIZE:
1829                 case -EIO:
1830                         local_phy = sas_get_local_phy(device);
1831                         rc = sas_phy_enable(local_phy, 0);
1832                         if (!rc) {
1833                                 local_phy->enabled = 0;
1834                                 dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n",
1835                                         SAS_ADDR(device->sas_addr), rc);
1836                                 rc = -ENODEV;
1837                         }
1838                         sas_put_local_phy(local_phy);
1839                         break;
1840                 default:
1841                         break;
1842                 }
1843         }
1844
1845         if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1846                 hisi_sas_release_task(hisi_hba, device);
1847
1848         return rc;
1849 }
1850
1851 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1852 {
1853         struct hisi_sas_device *sas_dev = device->lldd_dev;
1854         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1855         struct device *dev = hisi_hba->dev;
1856         int rc = TMF_RESP_FUNC_FAILED;
1857
1858         /* Clear internal IO and then lu reset */
1859         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1860         if (rc < 0) {
1861                 dev_err(dev, "lu_reset: internal abort failed\n");
1862                 goto out;
1863         }
1864         hisi_sas_dereg_device(hisi_hba, device);
1865
1866         if (dev_is_sata(device)) {
1867                 struct sas_phy *phy;
1868
1869                 phy = sas_get_local_phy(device);
1870
1871                 rc = sas_phy_reset(phy, true);
1872
1873                 if (rc == 0)
1874                         hisi_sas_release_task(hisi_hba, device);
1875                 sas_put_local_phy(phy);
1876         } else {
1877                 rc = sas_lu_reset(device, lun);
1878                 if (rc == TMF_RESP_FUNC_COMPLETE)
1879                         hisi_sas_release_task(hisi_hba, device);
1880         }
1881 out:
1882         if (rc != TMF_RESP_FUNC_COMPLETE)
1883                 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1884                              sas_dev->device_id, rc);
1885         return rc;
1886 }
1887
1888 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1889 {
1890         struct domain_device *device = data;
1891         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1892         int rc;
1893
1894         rc = hisi_sas_debug_I_T_nexus_reset(device);
1895         if (rc != TMF_RESP_FUNC_COMPLETE)
1896                 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1897                          SAS_ADDR(device->sas_addr), rc);
1898 }
1899
1900 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1901 {
1902         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1903         HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1904         ASYNC_DOMAIN_EXCLUSIVE(async);
1905         int i;
1906
1907         queue_work(hisi_hba->wq, &r.work);
1908         wait_for_completion(r.completion);
1909         if (!r.done)
1910                 return TMF_RESP_FUNC_FAILED;
1911
1912         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1913                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1914                 struct domain_device *device = sas_dev->sas_device;
1915
1916                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1917                     dev_is_expander(device->dev_type))
1918                         continue;
1919
1920                 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1921                                       device, &async);
1922         }
1923
1924         async_synchronize_full_domain(&async);
1925         hisi_sas_release_tasks(hisi_hba);
1926
1927         return TMF_RESP_FUNC_COMPLETE;
1928 }
1929
1930 static int hisi_sas_query_task(struct sas_task *task)
1931 {
1932         int rc = TMF_RESP_FUNC_FAILED;
1933
1934         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1935                 struct hisi_sas_slot *slot = task->lldd_task;
1936                 u32 tag = slot->idx;
1937
1938                 rc = sas_query_task(task, tag);
1939                 switch (rc) {
1940                 /* The task is still in Lun, release it then */
1941                 case TMF_RESP_FUNC_SUCC:
1942                 /* The task is not in Lun or failed, reset the phy */
1943                 case TMF_RESP_FUNC_FAILED:
1944                 case TMF_RESP_FUNC_COMPLETE:
1945                         break;
1946                 default:
1947                         rc = TMF_RESP_FUNC_FAILED;
1948                         break;
1949                 }
1950         }
1951         return rc;
1952 }
1953
1954 static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
1955                                             void *data)
1956 {
1957         struct domain_device *device = task->dev;
1958         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1959         struct hisi_sas_internal_abort_data *timeout = data;
1960
1961         if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1962                 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
1963
1964         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1965                 pr_err("Internal abort: timeout %016llx\n",
1966                        SAS_ADDR(device->sas_addr));
1967         } else {
1968                 struct hisi_sas_slot *slot = task->lldd_task;
1969
1970                 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1971
1972                 if (slot) {
1973                         struct hisi_sas_cq *cq =
1974                                 &hisi_hba->cq[slot->dlvry_queue];
1975                         /*
1976                          * sync irq or poll queue to avoid free'ing task
1977                          * before using task in IO completion
1978                          */
1979                         hisi_sas_sync_cq(cq);
1980                         slot->task = NULL;
1981                 }
1982
1983                 if (timeout->rst_ha_timeout) {
1984                         pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n",
1985                                SAS_ADDR(device->sas_addr));
1986                         queue_work(hisi_hba->wq, &hisi_hba->rst_work);
1987                 } else {
1988                         pr_err("Internal abort: timeout and not done %016llx.\n",
1989                                SAS_ADDR(device->sas_addr));
1990                 }
1991
1992                 return true;
1993         }
1994
1995         return false;
1996 }
1997
1998 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1999 {
2000         hisi_sas_port_notify_formed(sas_phy);
2001 }
2002
2003 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2004                         u8 reg_index, u8 reg_count, u8 *write_data)
2005 {
2006         struct hisi_hba *hisi_hba = sha->lldd_ha;
2007
2008         if (!hisi_hba->hw->write_gpio)
2009                 return -EOPNOTSUPP;
2010
2011         return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2012                                 reg_index, reg_count, write_data);
2013 }
2014
2015 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2016 {
2017         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2018         struct sas_phy *sphy = sas_phy->phy;
2019         unsigned long flags;
2020
2021         phy->phy_attached = 0;
2022         phy->phy_type = 0;
2023         phy->port = NULL;
2024
2025         spin_lock_irqsave(&phy->lock, flags);
2026         if (phy->enable)
2027                 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2028         else
2029                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2030         spin_unlock_irqrestore(&phy->lock, flags);
2031 }
2032
2033 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2034                        gfp_t gfp_flags)
2035 {
2036         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2037         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2038         struct device *dev = hisi_hba->dev;
2039
2040         if (rdy) {
2041                 /* Phy down but ready */
2042                 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2043                 hisi_sas_port_notify_formed(sas_phy);
2044         } else {
2045                 struct hisi_sas_port *port  = phy->port;
2046
2047                 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||
2048                     phy->in_reset) {
2049                         dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2050                         return;
2051                 }
2052                 /* Phy down and not ready */
2053                 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2054                 sas_phy_disconnected(sas_phy);
2055
2056                 if (port) {
2057                         if (phy->phy_type & PORT_TYPE_SAS) {
2058                                 int port_id = port->id;
2059
2060                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2061                                                                        port_id))
2062                                         port->port_attached = 0;
2063                         } else if (phy->phy_type & PORT_TYPE_SATA)
2064                                 port->port_attached = 0;
2065                 }
2066                 hisi_sas_phy_disconnected(phy);
2067         }
2068 }
2069 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2070
2071 void hisi_sas_phy_bcast(struct hisi_sas_phy *phy)
2072 {
2073         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2074         struct hisi_hba *hisi_hba = phy->hisi_hba;
2075
2076         if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags))
2077                 return;
2078
2079         sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC);
2080 }
2081 EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast);
2082
2083 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2084 {
2085         struct hisi_hba *hisi_hba = shost_priv(shost);
2086
2087         if (reset_type != SCSI_ADAPTER_RESET)
2088                 return -EOPNOTSUPP;
2089
2090         queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2091
2092         return 0;
2093 }
2094 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2095
2096 struct scsi_transport_template *hisi_sas_stt;
2097 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2098
2099 static struct sas_domain_function_template hisi_sas_transport_ops = {
2100         .lldd_dev_found         = hisi_sas_dev_found,
2101         .lldd_dev_gone          = hisi_sas_dev_gone,
2102         .lldd_execute_task      = hisi_sas_queue_command,
2103         .lldd_control_phy       = hisi_sas_control_phy,
2104         .lldd_abort_task        = hisi_sas_abort_task,
2105         .lldd_abort_task_set    = hisi_sas_abort_task_set,
2106         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
2107         .lldd_lu_reset          = hisi_sas_lu_reset,
2108         .lldd_query_task        = hisi_sas_query_task,
2109         .lldd_clear_nexus_ha    = hisi_sas_clear_nexus_ha,
2110         .lldd_port_formed       = hisi_sas_port_formed,
2111         .lldd_write_gpio        = hisi_sas_write_gpio,
2112         .lldd_tmf_aborted       = hisi_sas_tmf_aborted,
2113         .lldd_abort_timeout     = hisi_sas_internal_abort_timeout,
2114 };
2115
2116 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2117 {
2118         int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2119         struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2120
2121         for (i = 0; i < hisi_hba->queue_count; i++) {
2122                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2123                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2124                 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2125
2126                 s = sizeof(struct hisi_sas_cmd_hdr);
2127                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2128                         memset(&cmd_hdr[j], 0, s);
2129
2130                 dq->wr_point = 0;
2131
2132                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2133                 memset(hisi_hba->complete_hdr[i], 0, s);
2134                 cq->rd_point = 0;
2135         }
2136
2137         s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2138         memset(hisi_hba->initial_fis, 0, s);
2139
2140         s = max_command_entries * sizeof(struct hisi_sas_iost);
2141         memset(hisi_hba->iost, 0, s);
2142
2143         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2144         memset(hisi_hba->breakpoint, 0, s);
2145
2146         s = sizeof(struct hisi_sas_sata_breakpoint);
2147         for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2148                 memset(&sata_breakpoint[j], 0, s);
2149 }
2150 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2151
2152 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2153 {
2154         struct device *dev = hisi_hba->dev;
2155         int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2156         int max_command_entries_ru, sz_slot_buf_ru;
2157         int blk_cnt, slots_per_blk;
2158
2159         sema_init(&hisi_hba->sem, 1);
2160         spin_lock_init(&hisi_hba->lock);
2161         for (i = 0; i < hisi_hba->n_phy; i++) {
2162                 hisi_sas_phy_init(hisi_hba, i);
2163                 hisi_hba->port[i].port_attached = 0;
2164                 hisi_hba->port[i].id = -1;
2165         }
2166
2167         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2168                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2169                 hisi_hba->devices[i].device_id = i;
2170                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2171         }
2172
2173         for (i = 0; i < hisi_hba->queue_count; i++) {
2174                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2175                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2176
2177                 /* Completion queue structure */
2178                 cq->id = i;
2179                 cq->hisi_hba = hisi_hba;
2180                 spin_lock_init(&cq->poll_lock);
2181
2182                 /* Delivery queue structure */
2183                 spin_lock_init(&dq->lock);
2184                 INIT_LIST_HEAD(&dq->list);
2185                 dq->id = i;
2186                 dq->hisi_hba = hisi_hba;
2187
2188                 /* Delivery queue */
2189                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2190                 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2191                                                 &hisi_hba->cmd_hdr_dma[i],
2192                                                 GFP_KERNEL);
2193                 if (!hisi_hba->cmd_hdr[i])
2194                         goto err_out;
2195
2196                 /* Completion queue */
2197                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2198                 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2199                                                 &hisi_hba->complete_hdr_dma[i],
2200                                                 GFP_KERNEL);
2201                 if (!hisi_hba->complete_hdr[i])
2202                         goto err_out;
2203         }
2204
2205         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2206         hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2207                                              GFP_KERNEL);
2208         if (!hisi_hba->itct)
2209                 goto err_out;
2210
2211         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2212                                            sizeof(struct hisi_sas_slot),
2213                                            GFP_KERNEL);
2214         if (!hisi_hba->slot_info)
2215                 goto err_out;
2216
2217         /* roundup to avoid overly large block size */
2218         max_command_entries_ru = roundup(max_command_entries, 64);
2219         if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2220                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2221         else
2222                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2223         sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2224         s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2225         blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2226         slots_per_blk = s / sz_slot_buf_ru;
2227
2228         for (i = 0; i < blk_cnt; i++) {
2229                 int slot_index = i * slots_per_blk;
2230                 dma_addr_t buf_dma;
2231                 void *buf;
2232
2233                 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2234                                           GFP_KERNEL);
2235                 if (!buf)
2236                         goto err_out;
2237
2238                 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2239                         struct hisi_sas_slot *slot;
2240
2241                         slot = &hisi_hba->slot_info[slot_index];
2242                         slot->buf = buf;
2243                         slot->buf_dma = buf_dma;
2244                         slot->idx = slot_index;
2245
2246                         buf += sz_slot_buf_ru;
2247                         buf_dma += sz_slot_buf_ru;
2248                 }
2249         }
2250
2251         s = max_command_entries * sizeof(struct hisi_sas_iost);
2252         hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2253                                              GFP_KERNEL);
2254         if (!hisi_hba->iost)
2255                 goto err_out;
2256
2257         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2258         hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2259                                                    &hisi_hba->breakpoint_dma,
2260                                                    GFP_KERNEL);
2261         if (!hisi_hba->breakpoint)
2262                 goto err_out;
2263
2264         s = hisi_hba->slot_index_count = max_command_entries;
2265         hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);
2266         if (!hisi_hba->slot_index_tags)
2267                 goto err_out;
2268
2269         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2270         hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2271                                                     &hisi_hba->initial_fis_dma,
2272                                                     GFP_KERNEL);
2273         if (!hisi_hba->initial_fis)
2274                 goto err_out;
2275
2276         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2277         hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2278                                         &hisi_hba->sata_breakpoint_dma,
2279                                         GFP_KERNEL);
2280         if (!hisi_hba->sata_breakpoint)
2281                 goto err_out;
2282
2283         hisi_hba->last_slot_index = 0;
2284
2285         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2286         if (!hisi_hba->wq) {
2287                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2288                 goto err_out;
2289         }
2290
2291         return 0;
2292 err_out:
2293         return -ENOMEM;
2294 }
2295 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2296
2297 void hisi_sas_free(struct hisi_hba *hisi_hba)
2298 {
2299         int i;
2300
2301         for (i = 0; i < hisi_hba->n_phy; i++) {
2302                 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2303
2304                 del_timer_sync(&phy->timer);
2305         }
2306
2307         if (hisi_hba->wq)
2308                 destroy_workqueue(hisi_hba->wq);
2309 }
2310 EXPORT_SYMBOL_GPL(hisi_sas_free);
2311
2312 void hisi_sas_rst_work_handler(struct work_struct *work)
2313 {
2314         struct hisi_hba *hisi_hba =
2315                 container_of(work, struct hisi_hba, rst_work);
2316
2317         if (hisi_sas_controller_prereset(hisi_hba))
2318                 return;
2319
2320         hisi_sas_controller_reset(hisi_hba);
2321 }
2322 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2323
2324 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2325 {
2326         struct hisi_sas_rst *rst =
2327                 container_of(work, struct hisi_sas_rst, work);
2328
2329         if (hisi_sas_controller_prereset(rst->hisi_hba))
2330                 goto rst_complete;
2331
2332         if (!hisi_sas_controller_reset(rst->hisi_hba))
2333                 rst->done = true;
2334 rst_complete:
2335         complete(rst->completion);
2336 }
2337 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2338
2339 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2340 {
2341         struct device *dev = hisi_hba->dev;
2342         struct platform_device *pdev = hisi_hba->platform_dev;
2343         struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2344         struct clk *refclk;
2345
2346         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2347                                           SAS_ADDR_SIZE)) {
2348                 dev_err(dev, "could not get property sas-addr\n");
2349                 return -ENOENT;
2350         }
2351
2352         if (np) {
2353                 /*
2354                  * These properties are only required for platform device-based
2355                  * controller with DT firmware.
2356                  */
2357                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2358                                         "hisilicon,sas-syscon");
2359                 if (IS_ERR(hisi_hba->ctrl)) {
2360                         dev_err(dev, "could not get syscon\n");
2361                         return -ENOENT;
2362                 }
2363
2364                 if (device_property_read_u32(dev, "ctrl-reset-reg",
2365                                              &hisi_hba->ctrl_reset_reg)) {
2366                         dev_err(dev, "could not get property ctrl-reset-reg\n");
2367                         return -ENOENT;
2368                 }
2369
2370                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2371                                              &hisi_hba->ctrl_reset_sts_reg)) {
2372                         dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2373                         return -ENOENT;
2374                 }
2375
2376                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2377                                              &hisi_hba->ctrl_clock_ena_reg)) {
2378                         dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2379                         return -ENOENT;
2380                 }
2381         }
2382
2383         refclk = devm_clk_get(dev, NULL);
2384         if (IS_ERR(refclk))
2385                 dev_dbg(dev, "no ref clk property\n");
2386         else
2387                 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2388
2389         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2390                 dev_err(dev, "could not get property phy-count\n");
2391                 return -ENOENT;
2392         }
2393
2394         if (device_property_read_u32(dev, "queue-count",
2395                                      &hisi_hba->queue_count)) {
2396                 dev_err(dev, "could not get property queue-count\n");
2397                 return -ENOENT;
2398         }
2399
2400         return 0;
2401 }
2402 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2403
2404 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2405                                               const struct hisi_sas_hw *hw)
2406 {
2407         struct resource *res;
2408         struct Scsi_Host *shost;
2409         struct hisi_hba *hisi_hba;
2410         struct device *dev = &pdev->dev;
2411         int error;
2412
2413         shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2414         if (!shost) {
2415                 dev_err(dev, "scsi host alloc failed\n");
2416                 return NULL;
2417         }
2418         hisi_hba = shost_priv(shost);
2419
2420         INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2421         hisi_hba->hw = hw;
2422         hisi_hba->dev = dev;
2423         hisi_hba->platform_dev = pdev;
2424         hisi_hba->shost = shost;
2425         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2426
2427         timer_setup(&hisi_hba->timer, NULL, 0);
2428
2429         if (hisi_sas_get_fw_info(hisi_hba) < 0)
2430                 goto err_out;
2431
2432         error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2433         if (error) {
2434                 dev_err(dev, "No usable DMA addressing method\n");
2435                 goto err_out;
2436         }
2437
2438         hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2439         if (IS_ERR(hisi_hba->regs))
2440                 goto err_out;
2441
2442         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2443         if (res) {
2444                 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2445                 if (IS_ERR(hisi_hba->sgpio_regs))
2446                         goto err_out;
2447         }
2448
2449         if (hisi_sas_alloc(hisi_hba)) {
2450                 hisi_sas_free(hisi_hba);
2451                 goto err_out;
2452         }
2453
2454         return shost;
2455 err_out:
2456         scsi_host_put(shost);
2457         dev_err(dev, "shost alloc failed\n");
2458         return NULL;
2459 }
2460
2461 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2462 {
2463         if (hisi_hba->hw->interrupt_preinit)
2464                 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2465         return 0;
2466 }
2467
2468 int hisi_sas_probe(struct platform_device *pdev,
2469                    const struct hisi_sas_hw *hw)
2470 {
2471         struct Scsi_Host *shost;
2472         struct hisi_hba *hisi_hba;
2473         struct device *dev = &pdev->dev;
2474         struct asd_sas_phy **arr_phy;
2475         struct asd_sas_port **arr_port;
2476         struct sas_ha_struct *sha;
2477         int rc, phy_nr, port_nr, i;
2478
2479         shost = hisi_sas_shost_alloc(pdev, hw);
2480         if (!shost)
2481                 return -ENOMEM;
2482
2483         sha = SHOST_TO_SAS_HA(shost);
2484         hisi_hba = shost_priv(shost);
2485         platform_set_drvdata(pdev, sha);
2486
2487         phy_nr = port_nr = hisi_hba->n_phy;
2488
2489         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2490         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2491         if (!arr_phy || !arr_port) {
2492                 rc = -ENOMEM;
2493                 goto err_out_ha;
2494         }
2495
2496         sha->sas_phy = arr_phy;
2497         sha->sas_port = arr_port;
2498         sha->lldd_ha = hisi_hba;
2499
2500         shost->transportt = hisi_sas_stt;
2501         shost->max_id = HISI_SAS_MAX_DEVICES;
2502         shost->max_lun = ~0;
2503         shost->max_channel = 1;
2504         shost->max_cmd_len = 16;
2505         if (hisi_hba->hw->slot_index_alloc) {
2506                 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2507                 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2508         } else {
2509                 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2510                 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2511         }
2512
2513         sha->sas_ha_name = DRV_NAME;
2514         sha->dev = hisi_hba->dev;
2515         sha->sas_addr = &hisi_hba->sas_addr[0];
2516         sha->num_phys = hisi_hba->n_phy;
2517         sha->shost = hisi_hba->shost;
2518
2519         for (i = 0; i < hisi_hba->n_phy; i++) {
2520                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2521                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2522         }
2523
2524         rc = hisi_sas_interrupt_preinit(hisi_hba);
2525         if (rc)
2526                 goto err_out_ha;
2527
2528         rc = scsi_add_host(shost, &pdev->dev);
2529         if (rc)
2530                 goto err_out_ha;
2531
2532         rc = sas_register_ha(sha);
2533         if (rc)
2534                 goto err_out_register_ha;
2535
2536         rc = hisi_hba->hw->hw_init(hisi_hba);
2537         if (rc)
2538                 goto err_out_hw_init;
2539
2540         scsi_scan_host(shost);
2541
2542         return 0;
2543
2544 err_out_hw_init:
2545         sas_unregister_ha(sha);
2546 err_out_register_ha:
2547         scsi_remove_host(shost);
2548 err_out_ha:
2549         hisi_sas_free(hisi_hba);
2550         scsi_host_put(shost);
2551         return rc;
2552 }
2553 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2554
2555 void hisi_sas_remove(struct platform_device *pdev)
2556 {
2557         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2558         struct hisi_hba *hisi_hba = sha->lldd_ha;
2559         struct Scsi_Host *shost = sha->shost;
2560
2561         del_timer_sync(&hisi_hba->timer);
2562
2563         sas_unregister_ha(sha);
2564         sas_remove_host(shost);
2565
2566         hisi_sas_free(hisi_hba);
2567         scsi_host_put(shost);
2568 }
2569 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2570
2571 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2572 #define DEBUGFS_ENABLE_DEFAULT  "enabled"
2573 bool hisi_sas_debugfs_enable = true;
2574 u32 hisi_sas_debugfs_dump_count = 50;
2575 #else
2576 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2577 bool hisi_sas_debugfs_enable;
2578 u32 hisi_sas_debugfs_dump_count = 1;
2579 #endif
2580
2581 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2582 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2583 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2584                  "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2585
2586 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2587 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2588 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2589
2590 struct dentry *hisi_sas_debugfs_dir;
2591 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2592
2593 static __init int hisi_sas_init(void)
2594 {
2595         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2596         if (!hisi_sas_stt)
2597                 return -ENOMEM;
2598
2599         if (hisi_sas_debugfs_enable) {
2600                 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2601                 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2602                         pr_info("hisi_sas: Limiting debugfs dump count\n");
2603                         hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2604                 }
2605         }
2606
2607         return 0;
2608 }
2609
2610 static __exit void hisi_sas_exit(void)
2611 {
2612         sas_release_transport(hisi_sas_stt);
2613
2614         debugfs_remove(hisi_sas_debugfs_dir);
2615 }
2616
2617 module_init(hisi_sas_init);
2618 module_exit(hisi_sas_exit);
2619
2620 MODULE_LICENSE("GPL");
2621 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2622 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2623 MODULE_ALIAS("platform:" DRV_NAME);