drivers/scsi/hisi_sas/hisi_sas_main.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2015 Linaro Ltd.
   4  * Copyright (c) 2015 Hisilicon Limited.
   5  */
   6
   7 #include "hisi_sas.h"
   8 #define DRV_NAME "hisi_sas"
   9
  10 #define DEV_IS_GONE(dev) \
  11         ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
  12
  13 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
  14                                 u8 *lun, struct hisi_sas_tmf_task *tmf);
  15 static int
  16 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
  17                              struct domain_device *device,
  18                              int abort_flag, int tag);
  19 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
  20 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
  21                                 void *funcdata);
  22 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
  23                                   struct domain_device *device);
  24 static void hisi_sas_dev_gone(struct domain_device *device);
  25
  26 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
  27 {
  28         switch (fis->command) {
  29         case ATA_CMD_FPDMA_WRITE:
  30         case ATA_CMD_FPDMA_READ:
  31         case ATA_CMD_FPDMA_RECV:
  32         case ATA_CMD_FPDMA_SEND:
  33         case ATA_CMD_NCQ_NON_DATA:
  34                 return HISI_SAS_SATA_PROTOCOL_FPDMA;
  35
  36         case ATA_CMD_DOWNLOAD_MICRO:
  37         case ATA_CMD_ID_ATA:
  38         case ATA_CMD_PMP_READ:
  39         case ATA_CMD_READ_LOG_EXT:
  40         case ATA_CMD_PIO_READ:
  41         case ATA_CMD_PIO_READ_EXT:
  42         case ATA_CMD_PMP_WRITE:
  43         case ATA_CMD_WRITE_LOG_EXT:
  44         case ATA_CMD_PIO_WRITE:
  45         case ATA_CMD_PIO_WRITE_EXT:
  46                 return HISI_SAS_SATA_PROTOCOL_PIO;
  47
  48         case ATA_CMD_DSM:
  49         case ATA_CMD_DOWNLOAD_MICRO_DMA:
  50         case ATA_CMD_PMP_READ_DMA:
  51         case ATA_CMD_PMP_WRITE_DMA:
  52         case ATA_CMD_READ:
  53         case ATA_CMD_READ_EXT:
  54         case ATA_CMD_READ_LOG_DMA_EXT:
  55         case ATA_CMD_READ_STREAM_DMA_EXT:
  56         case ATA_CMD_TRUSTED_RCV_DMA:
  57         case ATA_CMD_TRUSTED_SND_DMA:
  58         case ATA_CMD_WRITE:
  59         case ATA_CMD_WRITE_EXT:
  60         case ATA_CMD_WRITE_FUA_EXT:
  61         case ATA_CMD_WRITE_QUEUED:
  62         case ATA_CMD_WRITE_LOG_DMA_EXT:
  63         case ATA_CMD_WRITE_STREAM_DMA_EXT:
  64         case ATA_CMD_ZAC_MGMT_IN:
  65                 return HISI_SAS_SATA_PROTOCOL_DMA;
  66
  67         case ATA_CMD_CHK_POWER:
  68         case ATA_CMD_DEV_RESET:
  69         case ATA_CMD_EDD:
  70         case ATA_CMD_FLUSH:
  71         case ATA_CMD_FLUSH_EXT:
  72         case ATA_CMD_VERIFY:
  73         case ATA_CMD_VERIFY_EXT:
  74         case ATA_CMD_SET_FEATURES:
  75         case ATA_CMD_STANDBY:
  76         case ATA_CMD_STANDBYNOW1:
  77         case ATA_CMD_ZAC_MGMT_OUT:
  78                 return HISI_SAS_SATA_PROTOCOL_NONDATA;
  79
  80         case ATA_CMD_SET_MAX:
  81                 switch (fis->features) {
  82                 case ATA_SET_MAX_PASSWD:
  83                 case ATA_SET_MAX_LOCK:
  84                         return HISI_SAS_SATA_PROTOCOL_PIO;
  85
  86                 case ATA_SET_MAX_PASSWD_DMA:
  87                 case ATA_SET_MAX_UNLOCK_DMA:
  88                         return HISI_SAS_SATA_PROTOCOL_DMA;
  89
  90                 default:
  91                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  92                 }
  93
  94         default:
  95         {
  96                 if (direction == DMA_NONE)
  97                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  98                 return HISI_SAS_SATA_PROTOCOL_PIO;
  99         }
 100         }
 101 }
 102 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
 103
 104 void hisi_sas_sata_done(struct sas_task *task,
 105                             struct hisi_sas_slot *slot)
 106 {
 107         struct task_status_struct *ts = &task->task_status;
 108         struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
 109         struct hisi_sas_status_buffer *status_buf =
 110                         hisi_sas_status_buf_addr_mem(slot);
 111         u8 *iu = &status_buf->iu[0];
 112         struct dev_to_host_fis *d2h =  (struct dev_to_host_fis *)iu;
 113
 114         resp->frame_len = sizeof(struct dev_to_host_fis);
 115         memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
 116
 117         ts->buf_valid_size = sizeof(*resp);
 118 }
 119 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
 120
 121 /*
 122  * This function assumes linkrate mask fits in 8 bits, which it
 123  * does for all HW versions supported.
 124  */
 125 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
 126 {
 127         u8 rate = 0;
 128         int i;
 129
 130         max -= SAS_LINK_RATE_1_5_GBPS;
 131         for (i = 0; i <= max; i++)
 132                 rate |= 1 << (i * 2);
 133         return rate;
 134 }
 135 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
 136
 137 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
 138 {
 139         return device->port->ha->lldd_ha;
 140 }
 141
 142 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
 143 {
 144         return container_of(sas_port, struct hisi_sas_port, sas_port);
 145 }
 146 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
 147
 148 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
 149 {
 150         int phy_no;
 151
 152         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
 153                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
 154 }
 155 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
 156
 157 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
 158 {
 159         void *bitmap = hisi_hba->slot_index_tags;
 160
 161         clear_bit(slot_idx, bitmap);
 162 }
 163
 164 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
 165 {
 166         if (hisi_hba->hw->slot_index_alloc ||
 167             slot_idx >= HISI_SAS_UNRESERVED_IPTT) {
 168                 spin_lock(&hisi_hba->lock);
 169                 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
 170                 spin_unlock(&hisi_hba->lock);
 171         }
 172 }
 173
 174 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
 175 {
 176         void *bitmap = hisi_hba->slot_index_tags;
 177
 178         set_bit(slot_idx, bitmap);
 179 }
 180
 181 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
 182                                      struct scsi_cmnd *scsi_cmnd)
 183 {
 184         int index;
 185         void *bitmap = hisi_hba->slot_index_tags;
 186
 187         if (scsi_cmnd)
 188                 return scsi_cmnd->request->tag;
 189
 190         spin_lock(&hisi_hba->lock);
 191         index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
 192                                    hisi_hba->last_slot_index + 1);
 193         if (index >= hisi_hba->slot_index_count) {
 194                 index = find_next_zero_bit(bitmap,
 195                                 hisi_hba->slot_index_count,
 196                                 HISI_SAS_UNRESERVED_IPTT);
 197                 if (index >= hisi_hba->slot_index_count) {
 198                         spin_unlock(&hisi_hba->lock);
 199                         return -SAS_QUEUE_FULL;
 200                 }
 201         }
 202         hisi_sas_slot_index_set(hisi_hba, index);
 203         hisi_hba->last_slot_index = index;
 204         spin_unlock(&hisi_hba->lock);
 205
 206         return index;
 207 }
 208
 209 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
 210 {
 211         int i;
 212
 213         for (i = 0; i < hisi_hba->slot_index_count; ++i)
 214                 hisi_sas_slot_index_clear(hisi_hba, i);
 215 }
 216
 217 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
 218                              struct hisi_sas_slot *slot)
 219 {
 220         int device_id = slot->device_id;
 221         struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
 222
 223         if (task) {
 224                 struct device *dev = hisi_hba->dev;
 225
 226                 if (!task->lldd_task)
 227                         return;
 228
 229                 task->lldd_task = NULL;
 230
 231                 if (!sas_protocol_ata(task->task_proto)) {
 232                         if (slot->n_elem)
 233                                 dma_unmap_sg(dev, task->scatter,
 234                                              task->num_scatter,
 235                                              task->data_dir);
 236                         if (slot->n_elem_dif) {
 237                                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 238                                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 239
 240                                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 241                                              scsi_prot_sg_count(scsi_cmnd),
 242                                              task->data_dir);
 243                         }
 244                 }
 245         }
 246
 247         spin_lock(&sas_dev->lock);
 248         list_del_init(&slot->entry);
 249         spin_unlock(&sas_dev->lock);
 250
 251         memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
 252
 253         hisi_sas_slot_index_free(hisi_hba, slot->idx);
 254 }
 255 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
 256
 257 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 258                                   struct hisi_sas_slot *slot)
 259 {
 260         hisi_hba->hw->prep_smp(hisi_hba, slot);
 261 }
 262
 263 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 264                                   struct hisi_sas_slot *slot)
 265 {
 266         hisi_hba->hw->prep_ssp(hisi_hba, slot);
 267 }
 268
 269 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 270                                   struct hisi_sas_slot *slot)
 271 {
 272         hisi_hba->hw->prep_stp(hisi_hba, slot);
 273 }
 274
 275 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
 276                 struct hisi_sas_slot *slot,
 277                 int device_id, int abort_flag, int tag_to_abort)
 278 {
 279         hisi_hba->hw->prep_abort(hisi_hba, slot,
 280                         device_id, abort_flag, tag_to_abort);
 281 }
 282
 283 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
 284                                struct sas_task *task, int n_elem,
 285                                int n_elem_req)
 286 {
 287         struct device *dev = hisi_hba->dev;
 288
 289         if (!sas_protocol_ata(task->task_proto)) {
 290                 if (task->num_scatter) {
 291                         if (n_elem)
 292                                 dma_unmap_sg(dev, task->scatter,
 293                                              task->num_scatter,
 294                                              task->data_dir);
 295                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 296                         if (n_elem_req)
 297                                 dma_unmap_sg(dev, &task->smp_task.smp_req,
 298                                              1, DMA_TO_DEVICE);
 299                 }
 300         }
 301 }
 302
 303 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
 304                             struct sas_task *task, int *n_elem,
 305                             int *n_elem_req)
 306 {
 307         struct device *dev = hisi_hba->dev;
 308         int rc;
 309
 310         if (sas_protocol_ata(task->task_proto)) {
 311                 *n_elem = task->num_scatter;
 312         } else {
 313                 unsigned int req_len;
 314
 315                 if (task->num_scatter) {
 316                         *n_elem = dma_map_sg(dev, task->scatter,
 317                                              task->num_scatter, task->data_dir);
 318                         if (!*n_elem) {
 319                                 rc = -ENOMEM;
 320                                 goto prep_out;
 321                         }
 322                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 323                         *n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
 324                                                  1, DMA_TO_DEVICE);
 325                         if (!*n_elem_req) {
 326                                 rc = -ENOMEM;
 327                                 goto prep_out;
 328                         }
 329                         req_len = sg_dma_len(&task->smp_task.smp_req);
 330                         if (req_len & 0x3) {
 331                                 rc = -EINVAL;
 332                                 goto err_out_dma_unmap;
 333                         }
 334                 }
 335         }
 336
 337         if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
 338                 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
 339                         *n_elem);
 340                 rc = -EINVAL;
 341                 goto err_out_dma_unmap;
 342         }
 343         return 0;
 344
 345 err_out_dma_unmap:
 346         /* It would be better to call dma_unmap_sg() here, but it's messy */
 347         hisi_sas_dma_unmap(hisi_hba, task, *n_elem,
 348                            *n_elem_req);
 349 prep_out:
 350         return rc;
 351 }
 352
 353 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
 354                                    struct sas_task *task, int n_elem_dif)
 355 {
 356         struct device *dev = hisi_hba->dev;
 357
 358         if (n_elem_dif) {
 359                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 360                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 361
 362                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 363                              scsi_prot_sg_count(scsi_cmnd),
 364                              task->data_dir);
 365         }
 366 }
 367
 368 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
 369                                 int *n_elem_dif, struct sas_task *task)
 370 {
 371         struct device *dev = hisi_hba->dev;
 372         struct sas_ssp_task *ssp_task;
 373         struct scsi_cmnd *scsi_cmnd;
 374         int rc;
 375
 376         if (task->num_scatter) {
 377                 ssp_task = &task->ssp_task;
 378                 scsi_cmnd = ssp_task->cmd;
 379
 380                 if (scsi_prot_sg_count(scsi_cmnd)) {
 381                         *n_elem_dif = dma_map_sg(dev,
 382                                                  scsi_prot_sglist(scsi_cmnd),
 383                                                  scsi_prot_sg_count(scsi_cmnd),
 384                                                  task->data_dir);
 385
 386                         if (!*n_elem_dif)
 387                                 return -ENOMEM;
 388
 389                         if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
 390                                 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
 391                                         *n_elem_dif);
 392                                 rc = -EINVAL;
 393                                 goto err_out_dif_dma_unmap;
 394                         }
 395                 }
 396         }
 397
 398         return 0;
 399
 400 err_out_dif_dma_unmap:
 401         dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 402                      scsi_prot_sg_count(scsi_cmnd), task->data_dir);
 403         return rc;
 404 }
 405
 406 static int hisi_sas_task_prep(struct sas_task *task,
 407                               struct hisi_sas_dq **dq_pointer,
 408                               bool is_tmf, struct hisi_sas_tmf_task *tmf,
 409                               int *pass)
 410 {
 411         struct domain_device *device = task->dev;
 412         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 413         struct hisi_sas_device *sas_dev = device->lldd_dev;
 414         struct hisi_sas_port *port;
 415         struct hisi_sas_slot *slot;
 416         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 417         struct asd_sas_port *sas_port = device->port;
 418         struct device *dev = hisi_hba->dev;
 419         int dlvry_queue_slot, dlvry_queue, rc, slot_idx;
 420         int n_elem = 0, n_elem_dif = 0, n_elem_req = 0;
 421         struct scsi_cmnd *scmd = NULL;
 422         struct hisi_sas_dq *dq;
 423         unsigned long flags;
 424         int wr_q_index;
 425
 426         if (DEV_IS_GONE(sas_dev)) {
 427                 if (sas_dev)
 428                         dev_info(dev, "task prep: device %d not ready\n",
 429                                  sas_dev->device_id);
 430                 else
 431                         dev_info(dev, "task prep: device %016llx not ready\n",
 432                                  SAS_ADDR(device->sas_addr));
 433
 434                 return -ECOMM;
 435         }
 436
 437         if (task->uldd_task) {
 438                 struct ata_queued_cmd *qc;
 439
 440                 if (dev_is_sata(device)) {
 441                         qc = task->uldd_task;
 442                         scmd = qc->scsicmd;
 443                 } else {
 444                         scmd = task->uldd_task;
 445                 }
 446         }
 447
 448         if (scmd) {
 449                 unsigned int dq_index;
 450                 u32 blk_tag;
 451
 452                 blk_tag = blk_mq_unique_tag(scmd->request);
 453                 dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
 454                 *dq_pointer = dq = &hisi_hba->dq[dq_index];
 455         } else {
 456                 struct Scsi_Host *shost = hisi_hba->shost;
 457                 struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
 458                 int queue = qmap->mq_map[raw_smp_processor_id()];
 459
 460                 *dq_pointer = dq = &hisi_hba->dq[queue];
 461         }
 462
 463         port = to_hisi_sas_port(sas_port);
 464         if (port && !port->port_attached) {
 465                 dev_info(dev, "task prep: %s port%d not attach device\n",
 466                          (dev_is_sata(device)) ?
 467                          "SATA/STP" : "SAS",
 468                          device->port->id);
 469
 470                 return -ECOMM;
 471         }
 472
 473         rc = hisi_sas_dma_map(hisi_hba, task, &n_elem,
 474                               &n_elem_req);
 475         if (rc < 0)
 476                 goto prep_out;
 477
 478         if (!sas_protocol_ata(task->task_proto)) {
 479                 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
 480                 if (rc < 0)
 481                         goto err_out_dma_unmap;
 482         }
 483
 484         if (hisi_hba->hw->slot_index_alloc)
 485                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
 486         else
 487                 rc = hisi_sas_slot_index_alloc(hisi_hba, scmd);
 488
 489         if (rc < 0)
 490                 goto err_out_dif_dma_unmap;
 491
 492         slot_idx = rc;
 493         slot = &hisi_hba->slot_info[slot_idx];
 494
 495         spin_lock(&dq->lock);
 496         wr_q_index = dq->wr_point;
 497         dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
 498         list_add_tail(&slot->delivery, &dq->list);
 499         spin_unlock(&dq->lock);
 500         spin_lock(&sas_dev->lock);
 501         list_add_tail(&slot->entry, &sas_dev->list);
 502         spin_unlock(&sas_dev->lock);
 503
 504         dlvry_queue = dq->id;
 505         dlvry_queue_slot = wr_q_index;
 506
 507         slot->device_id = sas_dev->device_id;
 508         slot->n_elem = n_elem;
 509         slot->n_elem_dif = n_elem_dif;
 510         slot->dlvry_queue = dlvry_queue;
 511         slot->dlvry_queue_slot = dlvry_queue_slot;
 512         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 513         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 514         slot->task = task;
 515         slot->port = port;
 516         slot->tmf = tmf;
 517         slot->is_internal = is_tmf;
 518         task->lldd_task = slot;
 519
 520         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 521         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
 522         memset(hisi_sas_status_buf_addr_mem(slot), 0,
 523                sizeof(struct hisi_sas_err_record));
 524
 525         switch (task->task_proto) {
 526         case SAS_PROTOCOL_SMP:
 527                 hisi_sas_task_prep_smp(hisi_hba, slot);
 528                 break;
 529         case SAS_PROTOCOL_SSP:
 530                 hisi_sas_task_prep_ssp(hisi_hba, slot);
 531                 break;
 532         case SAS_PROTOCOL_SATA:
 533         case SAS_PROTOCOL_STP:
 534         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 535                 hisi_sas_task_prep_ata(hisi_hba, slot);
 536                 break;
 537         default:
 538                 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
 539                         task->task_proto);
 540                 break;
 541         }
 542
 543         spin_lock_irqsave(&task->task_state_lock, flags);
 544         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 545         spin_unlock_irqrestore(&task->task_state_lock, flags);
 546
 547         ++(*pass);
 548         WRITE_ONCE(slot->ready, 1);
 549
 550         return 0;
 551
 552 err_out_dif_dma_unmap:
 553         if (!sas_protocol_ata(task->task_proto))
 554                 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
 555 err_out_dma_unmap:
 556         hisi_sas_dma_unmap(hisi_hba, task, n_elem,
 557                            n_elem_req);
 558 prep_out:
 559         dev_err(dev, "task prep: failed[%d]!\n", rc);
 560         return rc;
 561 }
 562
 563 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
 564                               bool is_tmf, struct hisi_sas_tmf_task *tmf)
 565 {
 566         u32 rc;
 567         u32 pass = 0;
 568         struct hisi_hba *hisi_hba;
 569         struct device *dev;
 570         struct domain_device *device = task->dev;
 571         struct asd_sas_port *sas_port = device->port;
 572         struct hisi_sas_dq *dq = NULL;
 573
 574         if (!sas_port) {
 575                 struct task_status_struct *ts = &task->task_status;
 576
 577                 ts->resp = SAS_TASK_UNDELIVERED;
 578                 ts->stat = SAS_PHY_DOWN;
 579                 /*
 580                  * libsas will use dev->port, should
 581                  * not call task_done for sata
 582                  */
 583                 if (device->dev_type != SAS_SATA_DEV)
 584                         task->task_done(task);
 585                 return -ECOMM;
 586         }
 587
 588         hisi_hba = dev_to_hisi_hba(device);
 589         dev = hisi_hba->dev;
 590
 591         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
 592                 if (!gfpflags_allow_blocking(gfp_flags))
 593                         return -EINVAL;
 594
 595                 down(&hisi_hba->sem);
 596                 up(&hisi_hba->sem);
 597         }
 598
 599         /* protect task_prep and start_delivery sequence */
 600         rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf, &pass);
 601         if (rc)
 602                 dev_err(dev, "task exec: failed[%d]!\n", rc);
 603
 604         if (likely(pass)) {
 605                 spin_lock(&dq->lock);
 606                 hisi_hba->hw->start_delivery(dq);
 607                 spin_unlock(&dq->lock);
 608         }
 609
 610         return rc;
 611 }
 612
 613 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no,
 614                                  gfp_t gfp_flags)
 615 {
 616         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 617         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 618
 619         if (!phy->phy_attached)
 620                 return;
 621
 622         if (test_bit(HISI_SAS_PM_BIT, &hisi_hba->flags) &&
 623             !sas_phy->suspended) {
 624                 dev_warn(hisi_hba->dev, "phy%d during suspend filtered out\n", phy_no);
 625                 return;
 626         }
 627
 628         sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
 629
 630         if (sas_phy->phy) {
 631                 struct sas_phy *sphy = sas_phy->phy;
 632
 633                 sphy->negotiated_linkrate = sas_phy->linkrate;
 634                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 635                 sphy->maximum_linkrate_hw =
 636                         hisi_hba->hw->phy_get_max_linkrate();
 637                 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
 638                         sphy->minimum_linkrate = phy->minimum_linkrate;
 639
 640                 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
 641                         sphy->maximum_linkrate = phy->maximum_linkrate;
 642         }
 643
 644         if (phy->phy_type & PORT_TYPE_SAS) {
 645                 struct sas_identify_frame *id;
 646
 647                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 648                 id->dev_type = phy->identify.device_type;
 649                 id->initiator_bits = SAS_PROTOCOL_ALL;
 650                 id->target_bits = phy->identify.target_port_protocols;
 651         } else if (phy->phy_type & PORT_TYPE_SATA) {
 652                 /* Nothing */
 653         }
 654
 655         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 656         sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
 657 }
 658
 659 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 660 {
 661         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 662         struct hisi_sas_device *sas_dev = NULL;
 663         int last = hisi_hba->last_dev_id;
 664         int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
 665         int i;
 666
 667         spin_lock(&hisi_hba->lock);
 668         for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
 669                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 670                         int queue = i % hisi_hba->queue_count;
 671                         struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
 672
 673                         hisi_hba->devices[i].device_id = i;
 674                         sas_dev = &hisi_hba->devices[i];
 675                         sas_dev->dev_status = HISI_SAS_DEV_INIT;
 676                         sas_dev->dev_type = device->dev_type;
 677                         sas_dev->hisi_hba = hisi_hba;
 678                         sas_dev->sas_device = device;
 679                         sas_dev->dq = dq;
 680                         spin_lock_init(&sas_dev->lock);
 681                         INIT_LIST_HEAD(&hisi_hba->devices[i].list);
 682                         break;
 683                 }
 684                 i++;
 685         }
 686         hisi_hba->last_dev_id = i;
 687         spin_unlock(&hisi_hba->lock);
 688
 689         return sas_dev;
 690 }
 691
 692 #define HISI_SAS_DISK_RECOVER_CNT 3
 693 static int hisi_sas_init_device(struct domain_device *device)
 694 {
 695         int rc = TMF_RESP_FUNC_COMPLETE;
 696         struct scsi_lun lun;
 697         struct hisi_sas_tmf_task tmf_task;
 698         int retry = HISI_SAS_DISK_RECOVER_CNT;
 699         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 700         struct device *dev = hisi_hba->dev;
 701         struct sas_phy *local_phy;
 702
 703         switch (device->dev_type) {
 704         case SAS_END_DEVICE:
 705                 int_to_scsilun(0, &lun);
 706
 707                 tmf_task.tmf = TMF_CLEAR_TASK_SET;
 708                 while (retry-- > 0) {
 709                         rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
 710                                                           &tmf_task);
 711                         if (rc == TMF_RESP_FUNC_COMPLETE) {
 712                                 hisi_sas_release_task(hisi_hba, device);
 713                                 break;
 714                         }
 715                 }
 716                 break;
 717         case SAS_SATA_DEV:
 718         case SAS_SATA_PM:
 719         case SAS_SATA_PM_PORT:
 720         case SAS_SATA_PENDING:
 721                 /*
 722                  * send HARD RESET to clear previous affiliation of
 723                  * STP target port
 724                  */
 725                 local_phy = sas_get_local_phy(device);
 726                 if (!scsi_is_sas_phy_local(local_phy) &&
 727                     !test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
 728                         unsigned long deadline = ata_deadline(jiffies, 20000);
 729                         struct sata_device *sata_dev = &device->sata_dev;
 730                         struct ata_host *ata_host = sata_dev->ata_host;
 731                         struct ata_port_operations *ops = ata_host->ops;
 732                         struct ata_port *ap = sata_dev->ap;
 733                         struct ata_link *link;
 734                         unsigned int classes;
 735
 736                         ata_for_each_link(link, ap, EDGE)
 737                                 rc = ops->hardreset(link, &classes,
 738                                                     deadline);
 739                 }
 740                 sas_put_local_phy(local_phy);
 741                 if (rc) {
 742                         dev_warn(dev, "SATA disk hardreset fail: %d\n", rc);
 743                         return rc;
 744                 }
 745
 746                 while (retry-- > 0) {
 747                         rc = hisi_sas_softreset_ata_disk(device);
 748                         if (!rc)
 749                                 break;
 750                 }
 751                 break;
 752         default:
 753                 break;
 754         }
 755
 756         return rc;
 757 }
 758
 759 static int hisi_sas_dev_found(struct domain_device *device)
 760 {
 761         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 762         struct domain_device *parent_dev = device->parent;
 763         struct hisi_sas_device *sas_dev;
 764         struct device *dev = hisi_hba->dev;
 765         int rc;
 766
 767         if (hisi_hba->hw->alloc_dev)
 768                 sas_dev = hisi_hba->hw->alloc_dev(device);
 769         else
 770                 sas_dev = hisi_sas_alloc_dev(device);
 771         if (!sas_dev) {
 772                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 773                         HISI_SAS_MAX_DEVICES);
 774                 return -EINVAL;
 775         }
 776
 777         device->lldd_dev = sas_dev;
 778         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 779
 780         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 781                 int phy_no;
 782                 u8 phy_num = parent_dev->ex_dev.num_phys;
 783                 struct ex_phy *phy;
 784
 785                 for (phy_no = 0; phy_no < phy_num; phy_no++) {
 786                         phy = &parent_dev->ex_dev.ex_phy[phy_no];
 787                         if (SAS_ADDR(phy->attached_sas_addr) ==
 788                                 SAS_ADDR(device->sas_addr))
 789                                 break;
 790                 }
 791
 792                 if (phy_no == phy_num) {
 793                         dev_info(dev, "dev found: no attached "
 794                                  "dev:%016llx at ex:%016llx\n",
 795                                  SAS_ADDR(device->sas_addr),
 796                                  SAS_ADDR(parent_dev->sas_addr));
 797                         rc = -EINVAL;
 798                         goto err_out;
 799                 }
 800         }
 801
 802         dev_info(dev, "dev[%d:%x] found\n",
 803                 sas_dev->device_id, sas_dev->dev_type);
 804
 805         rc = hisi_sas_init_device(device);
 806         if (rc)
 807                 goto err_out;
 808         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 809         return 0;
 810
 811 err_out:
 812         hisi_sas_dev_gone(device);
 813         return rc;
 814 }
 815
 816 int hisi_sas_slave_configure(struct scsi_device *sdev)
 817 {
 818         struct domain_device *dev = sdev_to_domain_dev(sdev);
 819         int ret = sas_slave_configure(sdev);
 820
 821         if (ret)
 822                 return ret;
 823         if (!dev_is_sata(dev))
 824                 sas_change_queue_depth(sdev, 64);
 825
 826         return 0;
 827 }
 828 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
 829
 830 void hisi_sas_scan_start(struct Scsi_Host *shost)
 831 {
 832         struct hisi_hba *hisi_hba = shost_priv(shost);
 833
 834         hisi_hba->hw->phys_init(hisi_hba);
 835 }
 836 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
 837
 838 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 839 {
 840         struct hisi_hba *hisi_hba = shost_priv(shost);
 841         struct sas_ha_struct *sha = &hisi_hba->sha;
 842
 843         /* Wait for PHY up interrupt to occur */
 844         if (time < HZ)
 845                 return 0;
 846
 847         sas_drain_work(sha);
 848         return 1;
 849 }
 850 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
 851
 852 static void hisi_sas_phyup_work(struct work_struct *work)
 853 {
 854         struct hisi_sas_phy *phy =
 855                 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
 856         struct hisi_hba *hisi_hba = phy->hisi_hba;
 857         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 858         int phy_no = sas_phy->id;
 859
 860         phy->wait_phyup_cnt = 0;
 861         if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
 862                 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
 863         hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
 864 }
 865
 866 static void hisi_sas_linkreset_work(struct work_struct *work)
 867 {
 868         struct hisi_sas_phy *phy =
 869                 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
 870         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 871
 872         hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
 873 }
 874
 875 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
 876         [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
 877         [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
 878 };
 879
 880 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
 881                                 enum hisi_sas_phy_event event)
 882 {
 883         struct hisi_hba *hisi_hba = phy->hisi_hba;
 884
 885         if (WARN_ON(event >= HISI_PHYES_NUM))
 886                 return false;
 887
 888         return queue_work(hisi_hba->wq, &phy->works[event]);
 889 }
 890 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
 891
 892 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
 893 {
 894         struct hisi_sas_phy *phy = from_timer(phy, t, timer);
 895         struct hisi_hba *hisi_hba = phy->hisi_hba;
 896         struct device *dev = hisi_hba->dev;
 897         int phy_no = phy->sas_phy.id;
 898
 899         dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
 900         hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
 901 }
 902
 903 #define HISI_SAS_WAIT_PHYUP_RETRIES     10
 904
 905 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
 906 {
 907         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 908         struct device *dev = hisi_hba->dev;
 909
 910         dev_dbg(dev, "phy%d OOB ready\n", phy_no);
 911         if (phy->phy_attached)
 912                 return;
 913
 914         if (!timer_pending(&phy->timer)) {
 915                 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
 916                         phy->wait_phyup_cnt++;
 917                         phy->timer.expires = jiffies +
 918                                              HISI_SAS_WAIT_PHYUP_TIMEOUT * HZ;
 919                         add_timer(&phy->timer);
 920                 } else {
 921                         dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
 922                                  phy_no, phy->wait_phyup_cnt);
 923                         phy->wait_phyup_cnt = 0;
 924                 }
 925         }
 926 }
 927 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
 928
 929 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
 930 {
 931         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 932         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 933         int i;
 934
 935         phy->hisi_hba = hisi_hba;
 936         phy->port = NULL;
 937         phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
 938         phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
 939         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 940         sas_phy->class = SAS;
 941         sas_phy->iproto = SAS_PROTOCOL_ALL;
 942         sas_phy->tproto = 0;
 943         sas_phy->type = PHY_TYPE_PHYSICAL;
 944         sas_phy->role = PHY_ROLE_INITIATOR;
 945         sas_phy->oob_mode = OOB_NOT_CONNECTED;
 946         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 947         sas_phy->id = phy_no;
 948         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
 949         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
 950         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
 951         sas_phy->lldd_phy = phy;
 952
 953         for (i = 0; i < HISI_PHYES_NUM; i++)
 954                 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
 955
 956         spin_lock_init(&phy->lock);
 957
 958         timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
 959 }
 960
 961 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
 962 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
 963 {
 964         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 965         struct asd_sas_phy *aphy = &phy->sas_phy;
 966         struct sas_phy *sphy = aphy->phy;
 967         unsigned long flags;
 968
 969         spin_lock_irqsave(&phy->lock, flags);
 970
 971         if (enable) {
 972                 /* We may have been enabled already; if so, don't touch */
 973                 if (!phy->enable)
 974                         sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
 975                 hisi_hba->hw->phy_start(hisi_hba, phy_no);
 976         } else {
 977                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
 978                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 979         }
 980         phy->enable = enable;
 981         spin_unlock_irqrestore(&phy->lock, flags);
 982 }
 983 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
 984
 985 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
 986 {
 987         struct sas_ha_struct *sas_ha = sas_phy->ha;
 988         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 989         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 990         struct asd_sas_port *sas_port = sas_phy->port;
 991         struct hisi_sas_port *port;
 992         unsigned long flags;
 993
 994         if (!sas_port)
 995                 return;
 996
 997         port = to_hisi_sas_port(sas_port);
 998         spin_lock_irqsave(&hisi_hba->lock, flags);
 999         port->port_attached = 1;
1000         port->id = phy->port_id;
1001         phy->port = port;
1002         sas_port->lldd_port = port;
1003         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1004 }
1005
1006 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1007                                      struct hisi_sas_slot *slot)
1008 {
1009         if (task) {
1010                 unsigned long flags;
1011                 struct task_status_struct *ts;
1012
1013                 ts = &task->task_status;
1014
1015                 ts->resp = SAS_TASK_COMPLETE;
1016                 ts->stat = SAS_ABORTED_TASK;
1017                 spin_lock_irqsave(&task->task_state_lock, flags);
1018                 task->task_state_flags &=
1019                         ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1020                 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1021                         task->task_state_flags |= SAS_TASK_STATE_DONE;
1022                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1023         }
1024
1025         hisi_sas_slot_task_free(hisi_hba, task, slot);
1026 }
1027
1028 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1029                         struct domain_device *device)
1030 {
1031         struct hisi_sas_slot *slot, *slot2;
1032         struct hisi_sas_device *sas_dev = device->lldd_dev;
1033
1034         list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1035                 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
1036 }
1037
1038 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1039 {
1040         struct hisi_sas_device *sas_dev;
1041         struct domain_device *device;
1042         int i;
1043
1044         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1045                 sas_dev = &hisi_hba->devices[i];
1046                 device = sas_dev->sas_device;
1047
1048                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1049                     !device)
1050                         continue;
1051
1052                 hisi_sas_release_task(hisi_hba, device);
1053         }
1054 }
1055 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1056
1057 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1058                                 struct domain_device *device)
1059 {
1060         if (hisi_hba->hw->dereg_device)
1061                 hisi_hba->hw->dereg_device(hisi_hba, device);
1062 }
1063
1064 static void hisi_sas_dev_gone(struct domain_device *device)
1065 {
1066         struct hisi_sas_device *sas_dev = device->lldd_dev;
1067         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1068         struct device *dev = hisi_hba->dev;
1069         int ret = 0;
1070
1071         dev_info(dev, "dev[%d:%x] is gone\n",
1072                  sas_dev->device_id, sas_dev->dev_type);
1073
1074         down(&hisi_hba->sem);
1075         if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
1076                 hisi_sas_internal_task_abort(hisi_hba, device,
1077                                              HISI_SAS_INT_ABT_DEV, 0);
1078
1079                 hisi_sas_dereg_device(hisi_hba, device);
1080
1081                 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1082                 device->lldd_dev = NULL;
1083         }
1084
1085         if (hisi_hba->hw->free_device)
1086                 hisi_hba->hw->free_device(sas_dev);
1087
1088         /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1089         if (!ret)
1090                 sas_dev->dev_type = SAS_PHY_UNUSED;
1091         sas_dev->sas_device = NULL;
1092         up(&hisi_hba->sem);
1093 }
1094
1095 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
1096 {
1097         return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
1098 }
1099
1100 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1101                         struct sas_phy_linkrates *r)
1102 {
1103         struct sas_phy_linkrates _r;
1104
1105         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1106         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1107         enum sas_linkrate min, max;
1108
1109         if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1110                 return -EINVAL;
1111
1112         if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1113                 max = sas_phy->phy->maximum_linkrate;
1114                 min = r->minimum_linkrate;
1115         } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1116                 max = r->maximum_linkrate;
1117                 min = sas_phy->phy->minimum_linkrate;
1118         } else
1119                 return -EINVAL;
1120
1121         _r.maximum_linkrate = max;
1122         _r.minimum_linkrate = min;
1123
1124         sas_phy->phy->maximum_linkrate = max;
1125         sas_phy->phy->minimum_linkrate = min;
1126
1127         hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1128         msleep(100);
1129         hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1130         hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1131
1132         return 0;
1133 }
1134
1135 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1136                                 void *funcdata)
1137 {
1138         struct sas_ha_struct *sas_ha = sas_phy->ha;
1139         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1140         int phy_no = sas_phy->id;
1141
1142         switch (func) {
1143         case PHY_FUNC_HARD_RESET:
1144                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1145                 break;
1146
1147         case PHY_FUNC_LINK_RESET:
1148                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1149                 msleep(100);
1150                 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1151                 break;
1152
1153         case PHY_FUNC_DISABLE:
1154                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1155                 break;
1156
1157         case PHY_FUNC_SET_LINK_RATE:
1158                 return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1159         case PHY_FUNC_GET_EVENTS:
1160                 if (hisi_hba->hw->get_events) {
1161                         hisi_hba->hw->get_events(hisi_hba, phy_no);
1162                         break;
1163                 }
1164                 fallthrough;
1165         case PHY_FUNC_RELEASE_SPINUP_HOLD:
1166         default:
1167                 return -EOPNOTSUPP;
1168         }
1169         return 0;
1170 }
1171
1172 static void hisi_sas_task_done(struct sas_task *task)
1173 {
1174         del_timer(&task->slow_task->timer);
1175         complete(&task->slow_task->completion);
1176 }
1177
1178 static void hisi_sas_tmf_timedout(struct timer_list *t)
1179 {
1180         struct sas_task_slow *slow = from_timer(slow, t, timer);
1181         struct sas_task *task = slow->task;
1182         unsigned long flags;
1183         bool is_completed = true;
1184
1185         spin_lock_irqsave(&task->task_state_lock, flags);
1186         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1187                 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1188                 is_completed = false;
1189         }
1190         spin_unlock_irqrestore(&task->task_state_lock, flags);
1191
1192         if (!is_completed)
1193                 complete(&task->slow_task->completion);
1194 }
1195
1196 #define TASK_TIMEOUT 20
1197 #define TASK_RETRY 3
1198 #define INTERNAL_ABORT_TIMEOUT 6
1199 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
1200                                            void *parameter, u32 para_len,
1201                                            struct hisi_sas_tmf_task *tmf)
1202 {
1203         struct hisi_sas_device *sas_dev = device->lldd_dev;
1204         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1205         struct device *dev = hisi_hba->dev;
1206         struct sas_task *task;
1207         int res, retry;
1208
1209         for (retry = 0; retry < TASK_RETRY; retry++) {
1210                 task = sas_alloc_slow_task(GFP_KERNEL);
1211                 if (!task)
1212                         return -ENOMEM;
1213
1214                 task->dev = device;
1215                 task->task_proto = device->tproto;
1216
1217                 if (dev_is_sata(device)) {
1218                         task->ata_task.device_control_reg_update = 1;
1219                         memcpy(&task->ata_task.fis, parameter, para_len);
1220                 } else {
1221                         memcpy(&task->ssp_task, parameter, para_len);
1222                 }
1223                 task->task_done = hisi_sas_task_done;
1224
1225                 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1226                 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT * HZ;
1227                 add_timer(&task->slow_task->timer);
1228
1229                 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
1230
1231                 if (res) {
1232                         del_timer(&task->slow_task->timer);
1233                         dev_err(dev, "abort tmf: executing internal task failed: %d\n",
1234                                 res);
1235                         goto ex_err;
1236                 }
1237
1238                 wait_for_completion(&task->slow_task->completion);
1239                 res = TMF_RESP_FUNC_FAILED;
1240                 /* Even TMF timed out, return direct. */
1241                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1242                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1243                                 struct hisi_sas_slot *slot = task->lldd_task;
1244
1245                                 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1246                                 if (slot) {
1247                                         struct hisi_sas_cq *cq =
1248                                                &hisi_hba->cq[slot->dlvry_queue];
1249                                         /*
1250                                          * sync irq to avoid free'ing task
1251                                          * before using task in IO completion
1252                                          */
1253                                         synchronize_irq(cq->irq_no);
1254                                         slot->task = NULL;
1255                                 }
1256
1257                                 goto ex_err;
1258                         } else
1259                                 dev_err(dev, "abort tmf: TMF task timeout\n");
1260                 }
1261
1262                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1263                      task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1264                         res = TMF_RESP_FUNC_COMPLETE;
1265                         break;
1266                 }
1267
1268                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1269                         task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1270                         res = TMF_RESP_FUNC_SUCC;
1271                         break;
1272                 }
1273
1274                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1275                       task->task_status.stat == SAS_DATA_UNDERRUN) {
1276                         /* no error, but return the number of bytes of
1277                          * underrun
1278                          */
1279                         dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x sts 0x%x underrun\n",
1280                                  SAS_ADDR(device->sas_addr),
1281                                  task->task_status.resp,
1282                                  task->task_status.stat);
1283                         res = task->task_status.residual;
1284                         break;
1285                 }
1286
1287                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1288                         task->task_status.stat == SAS_DATA_OVERRUN) {
1289                         dev_warn(dev, "abort tmf: blocked task error\n");
1290                         res = -EMSGSIZE;
1291                         break;
1292                 }
1293
1294                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1295                     task->task_status.stat == SAS_OPEN_REJECT) {
1296                         dev_warn(dev, "abort tmf: open reject failed\n");
1297                         res = -EIO;
1298                 } else {
1299                         dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x status 0x%x\n",
1300                                  SAS_ADDR(device->sas_addr),
1301                                  task->task_status.resp,
1302                                  task->task_status.stat);
1303                 }
1304                 sas_free_task(task);
1305                 task = NULL;
1306         }
1307 ex_err:
1308         if (retry == TASK_RETRY)
1309                 dev_warn(dev, "abort tmf: executing internal task failed!\n");
1310         sas_free_task(task);
1311         return res;
1312 }
1313
1314 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1315                 bool reset, int pmp, u8 *fis)
1316 {
1317         struct ata_taskfile tf;
1318
1319         ata_tf_init(dev, &tf);
1320         if (reset)
1321                 tf.ctl |= ATA_SRST;
1322         else
1323                 tf.ctl &= ~ATA_SRST;
1324         tf.command = ATA_CMD_DEV_RESET;
1325         ata_tf_to_fis(&tf, pmp, 0, fis);
1326 }
1327
1328 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1329 {
1330         u8 fis[20] = {0};
1331         struct ata_port *ap = device->sata_dev.ap;
1332         struct ata_link *link;
1333         int rc = TMF_RESP_FUNC_FAILED;
1334         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1335         struct device *dev = hisi_hba->dev;
1336         int s = sizeof(struct host_to_dev_fis);
1337
1338         ata_for_each_link(link, ap, EDGE) {
1339                 int pmp = sata_srst_pmp(link);
1340
1341                 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1342                 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1343                 if (rc != TMF_RESP_FUNC_COMPLETE)
1344                         break;
1345         }
1346
1347         if (rc == TMF_RESP_FUNC_COMPLETE) {
1348                 ata_for_each_link(link, ap, EDGE) {
1349                         int pmp = sata_srst_pmp(link);
1350
1351                         hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1352                         rc = hisi_sas_exec_internal_tmf_task(device, fis,
1353                                                              s, NULL);
1354                         if (rc != TMF_RESP_FUNC_COMPLETE)
1355                                 dev_err(dev, "ata disk %016llx de-reset failed\n",
1356                                         SAS_ADDR(device->sas_addr));
1357                 }
1358         } else {
1359                 dev_err(dev, "ata disk %016llx reset failed\n",
1360                         SAS_ADDR(device->sas_addr));
1361         }
1362
1363         if (rc == TMF_RESP_FUNC_COMPLETE)
1364                 hisi_sas_release_task(hisi_hba, device);
1365
1366         return rc;
1367 }
1368
1369 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1370                                 u8 *lun, struct hisi_sas_tmf_task *tmf)
1371 {
1372         struct sas_ssp_task ssp_task;
1373
1374         if (!(device->tproto & SAS_PROTOCOL_SSP))
1375                 return TMF_RESP_FUNC_ESUPP;
1376
1377         memcpy(ssp_task.LUN, lun, 8);
1378
1379         return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1380                                 sizeof(ssp_task), tmf);
1381 }
1382
1383 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1384 {
1385         u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1386         int i;
1387
1388         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1389                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1390                 struct domain_device *device = sas_dev->sas_device;
1391                 struct asd_sas_port *sas_port;
1392                 struct hisi_sas_port *port;
1393                 struct hisi_sas_phy *phy = NULL;
1394                 struct asd_sas_phy *sas_phy;
1395
1396                 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1397                                 || !device || !device->port)
1398                         continue;
1399
1400                 sas_port = device->port;
1401                 port = to_hisi_sas_port(sas_port);
1402
1403                 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1404                         if (state & BIT(sas_phy->id)) {
1405                                 phy = sas_phy->lldd_phy;
1406                                 break;
1407                         }
1408
1409                 if (phy) {
1410                         port->id = phy->port_id;
1411
1412                         /* Update linkrate of directly attached device. */
1413                         if (!device->parent)
1414                                 device->linkrate = phy->sas_phy.linkrate;
1415
1416                         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1417                 } else
1418                         port->id = 0xff;
1419         }
1420 }
1421
1422 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1423 {
1424         struct asd_sas_port *_sas_port = NULL;
1425         int phy_no;
1426
1427         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1428                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1429                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1430                 struct asd_sas_port *sas_port = sas_phy->port;
1431                 bool do_port_check = _sas_port != sas_port;
1432
1433                 if (!sas_phy->phy->enabled)
1434                         continue;
1435
1436                 /* Report PHY state change to libsas */
1437                 if (state & BIT(phy_no)) {
1438                         if (do_port_check && sas_port && sas_port->port_dev) {
1439                                 struct domain_device *dev = sas_port->port_dev;
1440
1441                                 _sas_port = sas_port;
1442
1443                                 if (dev_is_expander(dev->dev_type))
1444                                         sas_notify_port_event(sas_phy,
1445                                                         PORTE_BROADCAST_RCVD,
1446                                                         GFP_KERNEL);
1447                         }
1448                 } else {
1449                         hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1450                 }
1451         }
1452 }
1453
1454 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1455 {
1456         struct hisi_sas_device *sas_dev;
1457         struct domain_device *device;
1458         int i;
1459
1460         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1461                 sas_dev = &hisi_hba->devices[i];
1462                 device = sas_dev->sas_device;
1463
1464                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1465                         continue;
1466
1467                 hisi_sas_init_device(device);
1468         }
1469 }
1470
1471 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1472                                              struct asd_sas_port *sas_port,
1473                                              struct domain_device *device)
1474 {
1475         struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
1476         struct ata_port *ap = device->sata_dev.ap;
1477         struct device *dev = hisi_hba->dev;
1478         int s = sizeof(struct host_to_dev_fis);
1479         int rc = TMF_RESP_FUNC_FAILED;
1480         struct asd_sas_phy *sas_phy;
1481         struct ata_link *link;
1482         u8 fis[20] = {0};
1483         u32 state;
1484
1485         state = hisi_hba->hw->get_phys_state(hisi_hba);
1486         list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) {
1487                 if (!(state & BIT(sas_phy->id)))
1488                         continue;
1489
1490                 ata_for_each_link(link, ap, EDGE) {
1491                         int pmp = sata_srst_pmp(link);
1492
1493                         tmf_task.phy_id = sas_phy->id;
1494                         hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1495                         rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
1496                                                              &tmf_task);
1497                         if (rc != TMF_RESP_FUNC_COMPLETE) {
1498                                 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1499                                         sas_phy->id, rc);
1500                                 break;
1501                         }
1502                 }
1503         }
1504 }
1505
1506 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1507 {
1508         struct device *dev = hisi_hba->dev;
1509         int port_no, rc, i;
1510
1511         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1512                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1513                 struct domain_device *device = sas_dev->sas_device;
1514
1515                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1516                         continue;
1517
1518                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1519                                                   HISI_SAS_INT_ABT_DEV, 0);
1520                 if (rc < 0)
1521                         dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1522         }
1523
1524         for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1525                 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1526                 struct asd_sas_port *sas_port = &port->sas_port;
1527                 struct domain_device *port_dev = sas_port->port_dev;
1528                 struct domain_device *device;
1529
1530                 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1531                         continue;
1532
1533                 /* Try to find a SATA device */
1534                 list_for_each_entry(device, &sas_port->dev_list,
1535                                     dev_list_node) {
1536                         if (dev_is_sata(device)) {
1537                                 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1538                                                                  sas_port,
1539                                                                  device);
1540                                 break;
1541                         }
1542                 }
1543         }
1544 }
1545
1546 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1547 {
1548         struct Scsi_Host *shost = hisi_hba->shost;
1549
1550         down(&hisi_hba->sem);
1551         hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1552
1553         scsi_block_requests(shost);
1554         hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1555
1556         if (timer_pending(&hisi_hba->timer))
1557                 del_timer_sync(&hisi_hba->timer);
1558
1559         set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1560 }
1561 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1562
1563 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1564 {
1565         struct Scsi_Host *shost = hisi_hba->shost;
1566
1567         /* Init and wait for PHYs to come up and all libsas event finished. */
1568         hisi_hba->hw->phys_init(hisi_hba);
1569         msleep(1000);
1570         hisi_sas_refresh_port_id(hisi_hba);
1571         clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1572
1573         if (hisi_hba->reject_stp_links_msk)
1574                 hisi_sas_terminate_stp_reject(hisi_hba);
1575         hisi_sas_reset_init_all_devices(hisi_hba);
1576         up(&hisi_hba->sem);
1577         scsi_unblock_requests(shost);
1578         clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1579
1580         hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1581 }
1582 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1583
1584 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1585 {
1586         if (!hisi_hba->hw->soft_reset)
1587                 return -1;
1588
1589         if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1590                 return -1;
1591
1592         if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1593                 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1594
1595         return 0;
1596 }
1597
1598 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1599 {
1600         struct device *dev = hisi_hba->dev;
1601         struct Scsi_Host *shost = hisi_hba->shost;
1602         int rc;
1603
1604         dev_info(dev, "controller resetting...\n");
1605         hisi_sas_controller_reset_prepare(hisi_hba);
1606
1607         rc = hisi_hba->hw->soft_reset(hisi_hba);
1608         if (rc) {
1609                 dev_warn(dev, "controller reset failed (%d)\n", rc);
1610                 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1611                 up(&hisi_hba->sem);
1612                 scsi_unblock_requests(shost);
1613                 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1614                 return rc;
1615         }
1616
1617         hisi_sas_controller_reset_done(hisi_hba);
1618         dev_info(dev, "controller reset complete\n");
1619
1620         return 0;
1621 }
1622
1623 static int hisi_sas_abort_task(struct sas_task *task)
1624 {
1625         struct scsi_lun lun;
1626         struct hisi_sas_tmf_task tmf_task;
1627         struct domain_device *device = task->dev;
1628         struct hisi_sas_device *sas_dev = device->lldd_dev;
1629         struct hisi_hba *hisi_hba;
1630         struct device *dev;
1631         int rc = TMF_RESP_FUNC_FAILED;
1632         unsigned long flags;
1633
1634         if (!sas_dev)
1635                 return TMF_RESP_FUNC_FAILED;
1636
1637         hisi_hba = dev_to_hisi_hba(task->dev);
1638         dev = hisi_hba->dev;
1639
1640         spin_lock_irqsave(&task->task_state_lock, flags);
1641         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1642                 struct hisi_sas_slot *slot = task->lldd_task;
1643                 struct hisi_sas_cq *cq;
1644
1645                 if (slot) {
1646                         /*
1647                          * sync irq to avoid free'ing task
1648                          * before using task in IO completion
1649                          */
1650                         cq = &hisi_hba->cq[slot->dlvry_queue];
1651                         synchronize_irq(cq->irq_no);
1652                 }
1653                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1654                 rc = TMF_RESP_FUNC_COMPLETE;
1655                 goto out;
1656         }
1657         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1658         spin_unlock_irqrestore(&task->task_state_lock, flags);
1659
1660         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1661                 struct scsi_cmnd *cmnd = task->uldd_task;
1662                 struct hisi_sas_slot *slot = task->lldd_task;
1663                 u16 tag = slot->idx;
1664                 int rc2;
1665
1666                 int_to_scsilun(cmnd->device->lun, &lun);
1667                 tmf_task.tmf = TMF_ABORT_TASK;
1668                 tmf_task.tag_of_task_to_be_managed = tag;
1669
1670                 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1671                                                   &tmf_task);
1672
1673                 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1674                                                    HISI_SAS_INT_ABT_CMD, tag);
1675                 if (rc2 < 0) {
1676                         dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1677                         return TMF_RESP_FUNC_FAILED;
1678                 }
1679
1680                 /*
1681                  * If the TMF finds that the IO is not in the device and also
1682                  * the internal abort does not succeed, then it is safe to
1683                  * free the slot.
1684                  * Note: if the internal abort succeeds then the slot
1685                  * will have already been completed
1686                  */
1687                 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1688                         if (task->lldd_task)
1689                                 hisi_sas_do_release_task(hisi_hba, task, slot);
1690                 }
1691         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1692                 task->task_proto & SAS_PROTOCOL_STP) {
1693                 if (task->dev->dev_type == SAS_SATA_DEV) {
1694                         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1695                                                           HISI_SAS_INT_ABT_DEV,
1696                                                           0);
1697                         if (rc < 0) {
1698                                 dev_err(dev, "abort task: internal abort failed\n");
1699                                 goto out;
1700                         }
1701                         hisi_sas_dereg_device(hisi_hba, device);
1702                         rc = hisi_sas_softreset_ata_disk(device);
1703                 }
1704         } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1705                 /* SMP */
1706                 struct hisi_sas_slot *slot = task->lldd_task;
1707                 u32 tag = slot->idx;
1708                 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1709
1710                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1711                                                   HISI_SAS_INT_ABT_CMD, tag);
1712                 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1713                                         task->lldd_task) {
1714                         /*
1715                          * sync irq to avoid free'ing task
1716                          * before using task in IO completion
1717                          */
1718                         synchronize_irq(cq->irq_no);
1719                         slot->task = NULL;
1720                 }
1721         }
1722
1723 out:
1724         if (rc != TMF_RESP_FUNC_COMPLETE)
1725                 dev_notice(dev, "abort task: rc=%d\n", rc);
1726         return rc;
1727 }
1728
1729 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1730 {
1731         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1732         struct device *dev = hisi_hba->dev;
1733         struct hisi_sas_tmf_task tmf_task;
1734         int rc;
1735
1736         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1737                                           HISI_SAS_INT_ABT_DEV, 0);
1738         if (rc < 0) {
1739                 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1740                 return TMF_RESP_FUNC_FAILED;
1741         }
1742         hisi_sas_dereg_device(hisi_hba, device);
1743
1744         tmf_task.tmf = TMF_ABORT_TASK_SET;
1745         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1746
1747         if (rc == TMF_RESP_FUNC_COMPLETE)
1748                 hisi_sas_release_task(hisi_hba, device);
1749
1750         return rc;
1751 }
1752
1753 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1754 {
1755         struct hisi_sas_tmf_task tmf_task;
1756         int rc;
1757
1758         tmf_task.tmf = TMF_CLEAR_ACA;
1759         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1760
1761         return rc;
1762 }
1763
1764 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1765 {
1766         struct sas_phy *local_phy = sas_get_local_phy(device);
1767         struct hisi_sas_device *sas_dev = device->lldd_dev;
1768         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1769         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1770         DECLARE_COMPLETION_ONSTACK(phyreset);
1771         int rc, reset_type;
1772
1773         if (!local_phy->enabled) {
1774                 sas_put_local_phy(local_phy);
1775                 return -ENODEV;
1776         }
1777
1778         if (scsi_is_sas_phy_local(local_phy)) {
1779                 struct asd_sas_phy *sas_phy =
1780                         sas_ha->sas_phy[local_phy->number];
1781                 struct hisi_sas_phy *phy =
1782                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1783                 phy->in_reset = 1;
1784                 phy->reset_completion = &phyreset;
1785         }
1786
1787         reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1788                       !dev_is_sata(device)) ? true : false;
1789
1790         rc = sas_phy_reset(local_phy, reset_type);
1791         sas_put_local_phy(local_phy);
1792
1793         if (scsi_is_sas_phy_local(local_phy)) {
1794                 struct asd_sas_phy *sas_phy =
1795                         sas_ha->sas_phy[local_phy->number];
1796                 struct hisi_sas_phy *phy =
1797                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1798                 int ret = wait_for_completion_timeout(&phyreset, 2 * HZ);
1799                 unsigned long flags;
1800
1801                 spin_lock_irqsave(&phy->lock, flags);
1802                 phy->reset_completion = NULL;
1803                 phy->in_reset = 0;
1804                 spin_unlock_irqrestore(&phy->lock, flags);
1805
1806                 /* report PHY down if timed out */
1807                 if (!ret)
1808                         hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1809         } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) {
1810                 /*
1811                  * If in init state, we rely on caller to wait for link to be
1812                  * ready; otherwise, except phy reset is fail, delay.
1813                  */
1814                 if (!rc)
1815                         msleep(2000);
1816         }
1817
1818         return rc;
1819 }
1820
1821 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1822 {
1823         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1824         struct device *dev = hisi_hba->dev;
1825         int rc;
1826
1827         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1828                                           HISI_SAS_INT_ABT_DEV, 0);
1829         if (rc < 0) {
1830                 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1831                 return TMF_RESP_FUNC_FAILED;
1832         }
1833         hisi_sas_dereg_device(hisi_hba, device);
1834
1835         if (dev_is_sata(device)) {
1836                 rc = hisi_sas_softreset_ata_disk(device);
1837                 if (rc == TMF_RESP_FUNC_FAILED)
1838                         return TMF_RESP_FUNC_FAILED;
1839         }
1840
1841         rc = hisi_sas_debug_I_T_nexus_reset(device);
1842
1843         if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1844                 hisi_sas_release_task(hisi_hba, device);
1845
1846         return rc;
1847 }
1848
1849 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1850 {
1851         struct hisi_sas_device *sas_dev = device->lldd_dev;
1852         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1853         struct device *dev = hisi_hba->dev;
1854         int rc = TMF_RESP_FUNC_FAILED;
1855
1856         /* Clear internal IO and then lu reset */
1857         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1858                                           HISI_SAS_INT_ABT_DEV, 0);
1859         if (rc < 0) {
1860                 dev_err(dev, "lu_reset: internal abort failed\n");
1861                 goto out;
1862         }
1863         hisi_sas_dereg_device(hisi_hba, device);
1864
1865         if (dev_is_sata(device)) {
1866                 struct sas_phy *phy;
1867
1868                 phy = sas_get_local_phy(device);
1869
1870                 rc = sas_phy_reset(phy, true);
1871
1872                 if (rc == 0)
1873                         hisi_sas_release_task(hisi_hba, device);
1874                 sas_put_local_phy(phy);
1875         } else {
1876                 struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };
1877
1878                 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1879                 if (rc == TMF_RESP_FUNC_COMPLETE)
1880                         hisi_sas_release_task(hisi_hba, device);
1881         }
1882 out:
1883         if (rc != TMF_RESP_FUNC_COMPLETE)
1884                 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1885                              sas_dev->device_id, rc);
1886         return rc;
1887 }
1888
1889 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1890 {
1891         struct domain_device *device = data;
1892         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1893         int rc;
1894
1895         rc = hisi_sas_debug_I_T_nexus_reset(device);
1896         if (rc != TMF_RESP_FUNC_COMPLETE)
1897                 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1898                          SAS_ADDR(device->sas_addr), rc);
1899 }
1900
1901 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1902 {
1903         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1904         HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1905         ASYNC_DOMAIN_EXCLUSIVE(async);
1906         int i;
1907
1908         queue_work(hisi_hba->wq, &r.work);
1909         wait_for_completion(r.completion);
1910         if (!r.done)
1911                 return TMF_RESP_FUNC_FAILED;
1912
1913         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1914                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1915                 struct domain_device *device = sas_dev->sas_device;
1916
1917                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1918                     dev_is_expander(device->dev_type))
1919                         continue;
1920
1921                 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1922                                       device, &async);
1923         }
1924
1925         async_synchronize_full_domain(&async);
1926         hisi_sas_release_tasks(hisi_hba);
1927
1928         return TMF_RESP_FUNC_COMPLETE;
1929 }
1930
1931 static int hisi_sas_query_task(struct sas_task *task)
1932 {
1933         struct scsi_lun lun;
1934         struct hisi_sas_tmf_task tmf_task;
1935         int rc = TMF_RESP_FUNC_FAILED;
1936
1937         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1938                 struct scsi_cmnd *cmnd = task->uldd_task;
1939                 struct domain_device *device = task->dev;
1940                 struct hisi_sas_slot *slot = task->lldd_task;
1941                 u32 tag = slot->idx;
1942
1943                 int_to_scsilun(cmnd->device->lun, &lun);
1944                 tmf_task.tmf = TMF_QUERY_TASK;
1945                 tmf_task.tag_of_task_to_be_managed = tag;
1946
1947                 rc = hisi_sas_debug_issue_ssp_tmf(device,
1948                                                   lun.scsi_lun,
1949                                                   &tmf_task);
1950                 switch (rc) {
1951                 /* The task is still in Lun, release it then */
1952                 case TMF_RESP_FUNC_SUCC:
1953                 /* The task is not in Lun or failed, reset the phy */
1954                 case TMF_RESP_FUNC_FAILED:
1955                 case TMF_RESP_FUNC_COMPLETE:
1956                         break;
1957                 default:
1958                         rc = TMF_RESP_FUNC_FAILED;
1959                         break;
1960                 }
1961         }
1962         return rc;
1963 }
1964
1965 static int
1966 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1967                                   struct sas_task *task, int abort_flag,
1968                                   int task_tag, struct hisi_sas_dq *dq)
1969 {
1970         struct domain_device *device = task->dev;
1971         struct hisi_sas_device *sas_dev = device->lldd_dev;
1972         struct device *dev = hisi_hba->dev;
1973         struct hisi_sas_port *port;
1974         struct hisi_sas_slot *slot;
1975         struct asd_sas_port *sas_port = device->port;
1976         struct hisi_sas_cmd_hdr *cmd_hdr_base;
1977         int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1978         unsigned long flags;
1979         int wr_q_index;
1980
1981         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1982                 return -EINVAL;
1983
1984         if (!device->port)
1985                 return -1;
1986
1987         port = to_hisi_sas_port(sas_port);
1988
1989         /* simply get a slot and send abort command */
1990         rc = hisi_sas_slot_index_alloc(hisi_hba, NULL);
1991         if (rc < 0)
1992                 goto err_out;
1993
1994         slot_idx = rc;
1995         slot = &hisi_hba->slot_info[slot_idx];
1996
1997         spin_lock(&dq->lock);
1998         wr_q_index = dq->wr_point;
1999         dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
2000         list_add_tail(&slot->delivery, &dq->list);
2001         spin_unlock(&dq->lock);
2002         spin_lock(&sas_dev->lock);
2003         list_add_tail(&slot->entry, &sas_dev->list);
2004         spin_unlock(&sas_dev->lock);
2005
2006         dlvry_queue = dq->id;
2007         dlvry_queue_slot = wr_q_index;
2008
2009         slot->device_id = sas_dev->device_id;
2010         slot->n_elem = n_elem;
2011         slot->dlvry_queue = dlvry_queue;
2012         slot->dlvry_queue_slot = dlvry_queue_slot;
2013         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
2014         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
2015         slot->task = task;
2016         slot->port = port;
2017         slot->is_internal = true;
2018         task->lldd_task = slot;
2019
2020         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
2021         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
2022         memset(hisi_sas_status_buf_addr_mem(slot), 0,
2023                sizeof(struct hisi_sas_err_record));
2024
2025         hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
2026                                       abort_flag, task_tag);
2027
2028         spin_lock_irqsave(&task->task_state_lock, flags);
2029         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
2030         spin_unlock_irqrestore(&task->task_state_lock, flags);
2031         WRITE_ONCE(slot->ready, 1);
2032         /* send abort command to the chip */
2033         spin_lock(&dq->lock);
2034         hisi_hba->hw->start_delivery(dq);
2035         spin_unlock(&dq->lock);
2036
2037         return 0;
2038
2039 err_out:
2040         dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
2041
2042         return rc;
2043 }
2044
2045 /**
2046  * _hisi_sas_internal_task_abort -- execute an internal
2047  * abort command for single IO command or a device
2048  * @hisi_hba: host controller struct
2049  * @device: domain device
2050  * @abort_flag: mode of operation, device or single IO
2051  * @tag: tag of IO to be aborted (only relevant to single
2052  *       IO mode)
2053  * @dq: delivery queue for this internal abort command
2054  */
2055 static int
2056 _hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2057                               struct domain_device *device, int abort_flag,
2058                               int tag, struct hisi_sas_dq *dq)
2059 {
2060         struct sas_task *task;
2061         struct hisi_sas_device *sas_dev = device->lldd_dev;
2062         struct device *dev = hisi_hba->dev;
2063         int res;
2064
2065         /*
2066          * The interface is not realized means this HW don't support internal
2067          * abort, or don't need to do internal abort. Then here, we return
2068          * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
2069          * the internal abort has been executed and returned CQ.
2070          */
2071         if (!hisi_hba->hw->prep_abort)
2072                 return TMF_RESP_FUNC_FAILED;
2073
2074         task = sas_alloc_slow_task(GFP_KERNEL);
2075         if (!task)
2076                 return -ENOMEM;
2077
2078         task->dev = device;
2079         task->task_proto = device->tproto;
2080         task->task_done = hisi_sas_task_done;
2081         task->slow_task->timer.function = hisi_sas_tmf_timedout;
2082         task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT * HZ;
2083         add_timer(&task->slow_task->timer);
2084
2085         res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
2086                                                 task, abort_flag, tag, dq);
2087         if (res) {
2088                 del_timer(&task->slow_task->timer);
2089                 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
2090                         res);
2091                 goto exit;
2092         }
2093         wait_for_completion(&task->slow_task->completion);
2094         res = TMF_RESP_FUNC_FAILED;
2095
2096         /* Internal abort timed out */
2097         if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
2098                 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
2099                         queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
2100
2101                 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
2102                         struct hisi_sas_slot *slot = task->lldd_task;
2103
2104                         if (slot) {
2105                                 struct hisi_sas_cq *cq =
2106                                         &hisi_hba->cq[slot->dlvry_queue];
2107                                 /*
2108                                  * sync irq to avoid free'ing task
2109                                  * before using task in IO completion
2110                                  */
2111                                 synchronize_irq(cq->irq_no);
2112                                 slot->task = NULL;
2113                         }
2114                         dev_err(dev, "internal task abort: timeout and not done.\n");
2115
2116                         res = -EIO;
2117                         goto exit;
2118                 } else
2119                         dev_err(dev, "internal task abort: timeout.\n");
2120         }
2121
2122         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2123                 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
2124                 res = TMF_RESP_FUNC_COMPLETE;
2125                 goto exit;
2126         }
2127
2128         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2129                 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
2130                 res = TMF_RESP_FUNC_SUCC;
2131                 goto exit;
2132         }
2133
2134 exit:
2135         dev_dbg(dev, "internal task abort: task to dev %016llx task=%pK resp: 0x%x sts 0x%x\n",
2136                 SAS_ADDR(device->sas_addr), task,
2137                 task->task_status.resp, /* 0 is complete, -1 is undelivered */
2138                 task->task_status.stat);
2139         sas_free_task(task);
2140
2141         return res;
2142 }
2143
2144 static int
2145 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2146                              struct domain_device *device,
2147                              int abort_flag, int tag)
2148 {
2149         struct hisi_sas_slot *slot;
2150         struct device *dev = hisi_hba->dev;
2151         struct hisi_sas_dq *dq;
2152         int i, rc;
2153
2154         switch (abort_flag) {
2155         case HISI_SAS_INT_ABT_CMD:
2156                 slot = &hisi_hba->slot_info[tag];
2157                 dq = &hisi_hba->dq[slot->dlvry_queue];
2158                 return _hisi_sas_internal_task_abort(hisi_hba, device,
2159                                                      abort_flag, tag, dq);
2160         case HISI_SAS_INT_ABT_DEV:
2161                 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2162                         struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2163                         const struct cpumask *mask = cq->irq_mask;
2164
2165                         if (mask && !cpumask_intersects(cpu_online_mask, mask))
2166                                 continue;
2167                         dq = &hisi_hba->dq[i];
2168                         rc = _hisi_sas_internal_task_abort(hisi_hba, device,
2169                                                            abort_flag, tag,
2170                                                            dq);
2171                         if (rc)
2172                                 return rc;
2173                 }
2174                 break;
2175         default:
2176                 dev_err(dev, "Unrecognised internal abort flag (%d)\n",
2177                         abort_flag);
2178                 return -EINVAL;
2179         }
2180
2181         return 0;
2182 }
2183
2184 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2185 {
2186         hisi_sas_port_notify_formed(sas_phy);
2187 }
2188
2189 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2190                         u8 reg_index, u8 reg_count, u8 *write_data)
2191 {
2192         struct hisi_hba *hisi_hba = sha->lldd_ha;
2193
2194         if (!hisi_hba->hw->write_gpio)
2195                 return -EOPNOTSUPP;
2196
2197         return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2198                                 reg_index, reg_count, write_data);
2199 }
2200
2201 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2202 {
2203         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2204         struct sas_phy *sphy = sas_phy->phy;
2205         unsigned long flags;
2206
2207         phy->phy_attached = 0;
2208         phy->phy_type = 0;
2209         phy->port = NULL;
2210
2211         spin_lock_irqsave(&phy->lock, flags);
2212         if (phy->enable)
2213                 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2214         else
2215                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2216         spin_unlock_irqrestore(&phy->lock, flags);
2217 }
2218
2219 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2220                        gfp_t gfp_flags)
2221 {
2222         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2223         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2224         struct device *dev = hisi_hba->dev;
2225
2226         if (rdy) {
2227                 /* Phy down but ready */
2228                 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2229                 hisi_sas_port_notify_formed(sas_phy);
2230         } else {
2231                 struct hisi_sas_port *port  = phy->port;
2232
2233                 if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
2234                     phy->in_reset) {
2235                         dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2236                         return;
2237                 }
2238                 /* Phy down and not ready */
2239                 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2240                 sas_phy_disconnected(sas_phy);
2241
2242                 if (port) {
2243                         if (phy->phy_type & PORT_TYPE_SAS) {
2244                                 int port_id = port->id;
2245
2246                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2247                                                                        port_id))
2248                                         port->port_attached = 0;
2249                         } else if (phy->phy_type & PORT_TYPE_SATA)
2250                                 port->port_attached = 0;
2251                 }
2252                 hisi_sas_phy_disconnected(phy);
2253         }
2254 }
2255 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2256
2257 void hisi_sas_sync_irqs(struct hisi_hba *hisi_hba)
2258 {
2259         int i;
2260
2261         for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2262                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2263
2264                 synchronize_irq(cq->irq_no);
2265         }
2266 }
2267 EXPORT_SYMBOL_GPL(hisi_sas_sync_irqs);
2268
2269 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2270 {
2271         struct hisi_hba *hisi_hba = shost_priv(shost);
2272
2273         if (reset_type != SCSI_ADAPTER_RESET)
2274                 return -EOPNOTSUPP;
2275
2276         queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2277
2278         return 0;
2279 }
2280 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2281
2282 struct scsi_transport_template *hisi_sas_stt;
2283 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2284
2285 static struct sas_domain_function_template hisi_sas_transport_ops = {
2286         .lldd_dev_found         = hisi_sas_dev_found,
2287         .lldd_dev_gone          = hisi_sas_dev_gone,
2288         .lldd_execute_task      = hisi_sas_queue_command,
2289         .lldd_control_phy       = hisi_sas_control_phy,
2290         .lldd_abort_task        = hisi_sas_abort_task,
2291         .lldd_abort_task_set    = hisi_sas_abort_task_set,
2292         .lldd_clear_aca         = hisi_sas_clear_aca,
2293         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
2294         .lldd_lu_reset          = hisi_sas_lu_reset,
2295         .lldd_query_task        = hisi_sas_query_task,
2296         .lldd_clear_nexus_ha    = hisi_sas_clear_nexus_ha,
2297         .lldd_port_formed       = hisi_sas_port_formed,
2298         .lldd_write_gpio        = hisi_sas_write_gpio,
2299 };
2300
2301 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2302 {
2303         int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2304         struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2305
2306         for (i = 0; i < hisi_hba->queue_count; i++) {
2307                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2308                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2309                 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2310
2311                 s = sizeof(struct hisi_sas_cmd_hdr);
2312                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2313                         memset(&cmd_hdr[j], 0, s);
2314
2315                 dq->wr_point = 0;
2316
2317                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2318                 memset(hisi_hba->complete_hdr[i], 0, s);
2319                 cq->rd_point = 0;
2320         }
2321
2322         s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2323         memset(hisi_hba->initial_fis, 0, s);
2324
2325         s = max_command_entries * sizeof(struct hisi_sas_iost);
2326         memset(hisi_hba->iost, 0, s);
2327
2328         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2329         memset(hisi_hba->breakpoint, 0, s);
2330
2331         s = sizeof(struct hisi_sas_sata_breakpoint);
2332         for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2333                 memset(&sata_breakpoint[j], 0, s);
2334 }
2335 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2336
2337 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2338 {
2339         struct device *dev = hisi_hba->dev;
2340         int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2341         int max_command_entries_ru, sz_slot_buf_ru;
2342         int blk_cnt, slots_per_blk;
2343
2344         sema_init(&hisi_hba->sem, 1);
2345         spin_lock_init(&hisi_hba->lock);
2346         for (i = 0; i < hisi_hba->n_phy; i++) {
2347                 hisi_sas_phy_init(hisi_hba, i);
2348                 hisi_hba->port[i].port_attached = 0;
2349                 hisi_hba->port[i].id = -1;
2350         }
2351
2352         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2353                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2354                 hisi_hba->devices[i].device_id = i;
2355                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2356         }
2357
2358         for (i = 0; i < hisi_hba->queue_count; i++) {
2359                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2360                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2361
2362                 /* Completion queue structure */
2363                 cq->id = i;
2364                 cq->hisi_hba = hisi_hba;
2365
2366                 /* Delivery queue structure */
2367                 spin_lock_init(&dq->lock);
2368                 INIT_LIST_HEAD(&dq->list);
2369                 dq->id = i;
2370                 dq->hisi_hba = hisi_hba;
2371
2372                 /* Delivery queue */
2373                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2374                 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2375                                                 &hisi_hba->cmd_hdr_dma[i],
2376                                                 GFP_KERNEL);
2377                 if (!hisi_hba->cmd_hdr[i])
2378                         goto err_out;
2379
2380                 /* Completion queue */
2381                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2382                 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2383                                                 &hisi_hba->complete_hdr_dma[i],
2384                                                 GFP_KERNEL);
2385                 if (!hisi_hba->complete_hdr[i])
2386                         goto err_out;
2387         }
2388
2389         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2390         hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2391                                              GFP_KERNEL);
2392         if (!hisi_hba->itct)
2393                 goto err_out;
2394
2395         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2396                                            sizeof(struct hisi_sas_slot),
2397                                            GFP_KERNEL);
2398         if (!hisi_hba->slot_info)
2399                 goto err_out;
2400
2401         /* roundup to avoid overly large block size */
2402         max_command_entries_ru = roundup(max_command_entries, 64);
2403         if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2404                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2405         else
2406                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2407         sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2408         s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2409         blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2410         slots_per_blk = s / sz_slot_buf_ru;
2411
2412         for (i = 0; i < blk_cnt; i++) {
2413                 int slot_index = i * slots_per_blk;
2414                 dma_addr_t buf_dma;
2415                 void *buf;
2416
2417                 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2418                                           GFP_KERNEL);
2419                 if (!buf)
2420                         goto err_out;
2421
2422                 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2423                         struct hisi_sas_slot *slot;
2424
2425                         slot = &hisi_hba->slot_info[slot_index];
2426                         slot->buf = buf;
2427                         slot->buf_dma = buf_dma;
2428                         slot->idx = slot_index;
2429
2430                         buf += sz_slot_buf_ru;
2431                         buf_dma += sz_slot_buf_ru;
2432                 }
2433         }
2434
2435         s = max_command_entries * sizeof(struct hisi_sas_iost);
2436         hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2437                                              GFP_KERNEL);
2438         if (!hisi_hba->iost)
2439                 goto err_out;
2440
2441         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2442         hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2443                                                    &hisi_hba->breakpoint_dma,
2444                                                    GFP_KERNEL);
2445         if (!hisi_hba->breakpoint)
2446                 goto err_out;
2447
2448         hisi_hba->slot_index_count = max_command_entries;
2449         s = hisi_hba->slot_index_count / BITS_PER_BYTE;
2450         hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
2451         if (!hisi_hba->slot_index_tags)
2452                 goto err_out;
2453
2454         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2455         hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2456                                                     &hisi_hba->initial_fis_dma,
2457                                                     GFP_KERNEL);
2458         if (!hisi_hba->initial_fis)
2459                 goto err_out;
2460
2461         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2462         hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2463                                         &hisi_hba->sata_breakpoint_dma,
2464                                         GFP_KERNEL);
2465         if (!hisi_hba->sata_breakpoint)
2466                 goto err_out;
2467
2468         hisi_sas_slot_index_init(hisi_hba);
2469         hisi_hba->last_slot_index = HISI_SAS_UNRESERVED_IPTT;
2470
2471         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2472         if (!hisi_hba->wq) {
2473                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2474                 goto err_out;
2475         }
2476
2477         return 0;
2478 err_out:
2479         return -ENOMEM;
2480 }
2481 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2482
2483 void hisi_sas_free(struct hisi_hba *hisi_hba)
2484 {
2485         int i;
2486
2487         for (i = 0; i < hisi_hba->n_phy; i++) {
2488                 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2489
2490                 del_timer_sync(&phy->timer);
2491         }
2492
2493         if (hisi_hba->wq)
2494                 destroy_workqueue(hisi_hba->wq);
2495 }
2496 EXPORT_SYMBOL_GPL(hisi_sas_free);
2497
2498 void hisi_sas_rst_work_handler(struct work_struct *work)
2499 {
2500         struct hisi_hba *hisi_hba =
2501                 container_of(work, struct hisi_hba, rst_work);
2502
2503         if (hisi_sas_controller_prereset(hisi_hba))
2504                 return;
2505
2506         hisi_sas_controller_reset(hisi_hba);
2507 }
2508 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2509
2510 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2511 {
2512         struct hisi_sas_rst *rst =
2513                 container_of(work, struct hisi_sas_rst, work);
2514
2515         if (hisi_sas_controller_prereset(rst->hisi_hba))
2516                 goto rst_complete;
2517
2518         if (!hisi_sas_controller_reset(rst->hisi_hba))
2519                 rst->done = true;
2520 rst_complete:
2521         complete(rst->completion);
2522 }
2523 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2524
2525 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2526 {
2527         struct device *dev = hisi_hba->dev;
2528         struct platform_device *pdev = hisi_hba->platform_dev;
2529         struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2530         struct clk *refclk;
2531
2532         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2533                                           SAS_ADDR_SIZE)) {
2534                 dev_err(dev, "could not get property sas-addr\n");
2535                 return -ENOENT;
2536         }
2537
2538         if (np) {
2539                 /*
2540                  * These properties are only required for platform device-based
2541                  * controller with DT firmware.
2542                  */
2543                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2544                                         "hisilicon,sas-syscon");
2545                 if (IS_ERR(hisi_hba->ctrl)) {
2546                         dev_err(dev, "could not get syscon\n");
2547                         return -ENOENT;
2548                 }
2549
2550                 if (device_property_read_u32(dev, "ctrl-reset-reg",
2551                                              &hisi_hba->ctrl_reset_reg)) {
2552                         dev_err(dev, "could not get property ctrl-reset-reg\n");
2553                         return -ENOENT;
2554                 }
2555
2556                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2557                                              &hisi_hba->ctrl_reset_sts_reg)) {
2558                         dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2559                         return -ENOENT;
2560                 }
2561
2562                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2563                                              &hisi_hba->ctrl_clock_ena_reg)) {
2564                         dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2565                         return -ENOENT;
2566                 }
2567         }
2568
2569         refclk = devm_clk_get(dev, NULL);
2570         if (IS_ERR(refclk))
2571                 dev_dbg(dev, "no ref clk property\n");
2572         else
2573                 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2574
2575         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2576                 dev_err(dev, "could not get property phy-count\n");
2577                 return -ENOENT;
2578         }
2579
2580         if (device_property_read_u32(dev, "queue-count",
2581                                      &hisi_hba->queue_count)) {
2582                 dev_err(dev, "could not get property queue-count\n");
2583                 return -ENOENT;
2584         }
2585
2586         return 0;
2587 }
2588 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2589
2590 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2591                                               const struct hisi_sas_hw *hw)
2592 {
2593         struct resource *res;
2594         struct Scsi_Host *shost;
2595         struct hisi_hba *hisi_hba;
2596         struct device *dev = &pdev->dev;
2597         int error;
2598
2599         shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2600         if (!shost) {
2601                 dev_err(dev, "scsi host alloc failed\n");
2602                 return NULL;
2603         }
2604         hisi_hba = shost_priv(shost);
2605
2606         INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2607         hisi_hba->hw = hw;
2608         hisi_hba->dev = dev;
2609         hisi_hba->platform_dev = pdev;
2610         hisi_hba->shost = shost;
2611         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2612
2613         timer_setup(&hisi_hba->timer, NULL, 0);
2614
2615         if (hisi_sas_get_fw_info(hisi_hba) < 0)
2616                 goto err_out;
2617
2618         error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2619         if (error)
2620                 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
2621
2622         if (error) {
2623                 dev_err(dev, "No usable DMA addressing method\n");
2624                 goto err_out;
2625         }
2626
2627         hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2628         if (IS_ERR(hisi_hba->regs))
2629                 goto err_out;
2630
2631         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2632         if (res) {
2633                 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2634                 if (IS_ERR(hisi_hba->sgpio_regs))
2635                         goto err_out;
2636         }
2637
2638         if (hisi_sas_alloc(hisi_hba)) {
2639                 hisi_sas_free(hisi_hba);
2640                 goto err_out;
2641         }
2642
2643         return shost;
2644 err_out:
2645         scsi_host_put(shost);
2646         dev_err(dev, "shost alloc failed\n");
2647         return NULL;
2648 }
2649
2650 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2651 {
2652         if (hisi_hba->hw->interrupt_preinit)
2653                 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2654         return 0;
2655 }
2656
2657 int hisi_sas_probe(struct platform_device *pdev,
2658                    const struct hisi_sas_hw *hw)
2659 {
2660         struct Scsi_Host *shost;
2661         struct hisi_hba *hisi_hba;
2662         struct device *dev = &pdev->dev;
2663         struct asd_sas_phy **arr_phy;
2664         struct asd_sas_port **arr_port;
2665         struct sas_ha_struct *sha;
2666         int rc, phy_nr, port_nr, i;
2667
2668         shost = hisi_sas_shost_alloc(pdev, hw);
2669         if (!shost)
2670                 return -ENOMEM;
2671
2672         sha = SHOST_TO_SAS_HA(shost);
2673         hisi_hba = shost_priv(shost);
2674         platform_set_drvdata(pdev, sha);
2675
2676         phy_nr = port_nr = hisi_hba->n_phy;
2677
2678         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2679         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2680         if (!arr_phy || !arr_port) {
2681                 rc = -ENOMEM;
2682                 goto err_out_ha;
2683         }
2684
2685         sha->sas_phy = arr_phy;
2686         sha->sas_port = arr_port;
2687         sha->lldd_ha = hisi_hba;
2688
2689         shost->transportt = hisi_sas_stt;
2690         shost->max_id = HISI_SAS_MAX_DEVICES;
2691         shost->max_lun = ~0;
2692         shost->max_channel = 1;
2693         shost->max_cmd_len = 16;
2694         if (hisi_hba->hw->slot_index_alloc) {
2695                 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2696                 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2697         } else {
2698                 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2699                 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2700         }
2701
2702         sha->sas_ha_name = DRV_NAME;
2703         sha->dev = hisi_hba->dev;
2704         sha->lldd_module = THIS_MODULE;
2705         sha->sas_addr = &hisi_hba->sas_addr[0];
2706         sha->num_phys = hisi_hba->n_phy;
2707         sha->core.shost = hisi_hba->shost;
2708
2709         for (i = 0; i < hisi_hba->n_phy; i++) {
2710                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2711                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2712         }
2713
2714         rc = hisi_sas_interrupt_preinit(hisi_hba);
2715         if (rc)
2716                 goto err_out_ha;
2717
2718         rc = scsi_add_host(shost, &pdev->dev);
2719         if (rc)
2720                 goto err_out_ha;
2721
2722         rc = sas_register_ha(sha);
2723         if (rc)
2724                 goto err_out_register_ha;
2725
2726         rc = hisi_hba->hw->hw_init(hisi_hba);
2727         if (rc)
2728                 goto err_out_hw_init;
2729
2730         scsi_scan_host(shost);
2731
2732         return 0;
2733
2734 err_out_hw_init:
2735         sas_unregister_ha(sha);
2736 err_out_register_ha:
2737         scsi_remove_host(shost);
2738 err_out_ha:
2739         hisi_sas_free(hisi_hba);
2740         scsi_host_put(shost);
2741         return rc;
2742 }
2743 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2744
2745 int hisi_sas_remove(struct platform_device *pdev)
2746 {
2747         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2748         struct hisi_hba *hisi_hba = sha->lldd_ha;
2749         struct Scsi_Host *shost = sha->core.shost;
2750
2751         if (timer_pending(&hisi_hba->timer))
2752                 del_timer(&hisi_hba->timer);
2753
2754         sas_unregister_ha(sha);
2755         sas_remove_host(sha->core.shost);
2756
2757         hisi_sas_free(hisi_hba);
2758         scsi_host_put(shost);
2759         return 0;
2760 }
2761 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2762
2763 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2764 #define DEBUGFS_ENABLE_DEFAULT  "enabled"
2765 bool hisi_sas_debugfs_enable = true;
2766 u32 hisi_sas_debugfs_dump_count = 50;
2767 #else
2768 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2769 bool hisi_sas_debugfs_enable;
2770 u32 hisi_sas_debugfs_dump_count = 1;
2771 #endif
2772
2773 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2774 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2775 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2776                  "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2777
2778 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2779 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2780 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2781
2782 struct dentry *hisi_sas_debugfs_dir;
2783 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2784
2785 static __init int hisi_sas_init(void)
2786 {
2787         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2788         if (!hisi_sas_stt)
2789                 return -ENOMEM;
2790
2791         if (hisi_sas_debugfs_enable) {
2792                 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2793                 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2794                         pr_info("hisi_sas: Limiting debugfs dump count\n");
2795                         hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2796                 }
2797         }
2798
2799         return 0;
2800 }
2801
2802 static __exit void hisi_sas_exit(void)
2803 {
2804         sas_release_transport(hisi_sas_stt);
2805
2806         debugfs_remove(hisi_sas_debugfs_dir);
2807 }
2808
2809 module_init(hisi_sas_init);
2810 module_exit(hisi_sas_exit);
2811
2812 MODULE_LICENSE("GPL");
2813 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2814 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2815 MODULE_ALIAS("platform:" DRV_NAME);