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, bool rst_to_recover);
  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_cmd_to_rq(scsi_cmnd)->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 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
 210                              struct hisi_sas_slot *slot)
 211 {
 212         int device_id = slot->device_id;
 213         struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
 214
 215         if (task) {
 216                 struct device *dev = hisi_hba->dev;
 217
 218                 if (!task->lldd_task)
 219                         return;
 220
 221                 task->lldd_task = NULL;
 222
 223                 if (!sas_protocol_ata(task->task_proto)) {
 224                         if (slot->n_elem)
 225                                 dma_unmap_sg(dev, task->scatter,
 226                                              task->num_scatter,
 227                                              task->data_dir);
 228                         if (slot->n_elem_dif) {
 229                                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 230                                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 231
 232                                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 233                                              scsi_prot_sg_count(scsi_cmnd),
 234                                              task->data_dir);
 235                         }
 236                 }
 237         }
 238
 239         spin_lock(&sas_dev->lock);
 240         list_del_init(&slot->entry);
 241         spin_unlock(&sas_dev->lock);
 242
 243         memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
 244
 245         hisi_sas_slot_index_free(hisi_hba, slot->idx);
 246 }
 247 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
 248
 249 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 250                                   struct hisi_sas_slot *slot)
 251 {
 252         hisi_hba->hw->prep_smp(hisi_hba, slot);
 253 }
 254
 255 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 256                                   struct hisi_sas_slot *slot)
 257 {
 258         hisi_hba->hw->prep_ssp(hisi_hba, slot);
 259 }
 260
 261 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 262                                   struct hisi_sas_slot *slot)
 263 {
 264         hisi_hba->hw->prep_stp(hisi_hba, slot);
 265 }
 266
 267 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
 268                 struct hisi_sas_internal_abort *abort,
 269                 struct hisi_sas_slot *slot, int device_id)
 270 {
 271         hisi_hba->hw->prep_abort(hisi_hba, slot,
 272                         device_id, abort->flag, abort->tag);
 273 }
 274
 275 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
 276                                struct sas_task *task, int n_elem,
 277                                int n_elem_req)
 278 {
 279         struct device *dev = hisi_hba->dev;
 280
 281         if (!sas_protocol_ata(task->task_proto)) {
 282                 if (task->num_scatter) {
 283                         if (n_elem)
 284                                 dma_unmap_sg(dev, task->scatter,
 285                                              task->num_scatter,
 286                                              task->data_dir);
 287                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 288                         if (n_elem_req)
 289                                 dma_unmap_sg(dev, &task->smp_task.smp_req,
 290                                              1, DMA_TO_DEVICE);
 291                 }
 292         }
 293 }
 294
 295 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
 296                             struct sas_task *task, int *n_elem,
 297                             int *n_elem_req)
 298 {
 299         struct device *dev = hisi_hba->dev;
 300         int rc;
 301
 302         if (sas_protocol_ata(task->task_proto)) {
 303                 *n_elem = task->num_scatter;
 304         } else {
 305                 unsigned int req_len;
 306
 307                 if (task->num_scatter) {
 308                         *n_elem = dma_map_sg(dev, task->scatter,
 309                                              task->num_scatter, task->data_dir);
 310                         if (!*n_elem) {
 311                                 rc = -ENOMEM;
 312                                 goto prep_out;
 313                         }
 314                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 315                         *n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
 316                                                  1, DMA_TO_DEVICE);
 317                         if (!*n_elem_req) {
 318                                 rc = -ENOMEM;
 319                                 goto prep_out;
 320                         }
 321                         req_len = sg_dma_len(&task->smp_task.smp_req);
 322                         if (req_len & 0x3) {
 323                                 rc = -EINVAL;
 324                                 goto err_out_dma_unmap;
 325                         }
 326                 }
 327         }
 328
 329         if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
 330                 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
 331                         *n_elem);
 332                 rc = -EINVAL;
 333                 goto err_out_dma_unmap;
 334         }
 335         return 0;
 336
 337 err_out_dma_unmap:
 338         /* It would be better to call dma_unmap_sg() here, but it's messy */
 339         hisi_sas_dma_unmap(hisi_hba, task, *n_elem,
 340                            *n_elem_req);
 341 prep_out:
 342         return rc;
 343 }
 344
 345 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
 346                                    struct sas_task *task, int n_elem_dif)
 347 {
 348         struct device *dev = hisi_hba->dev;
 349
 350         if (n_elem_dif) {
 351                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 352                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 353
 354                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 355                              scsi_prot_sg_count(scsi_cmnd),
 356                              task->data_dir);
 357         }
 358 }
 359
 360 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
 361                                 int *n_elem_dif, struct sas_task *task)
 362 {
 363         struct device *dev = hisi_hba->dev;
 364         struct sas_ssp_task *ssp_task;
 365         struct scsi_cmnd *scsi_cmnd;
 366         int rc;
 367
 368         if (task->num_scatter) {
 369                 ssp_task = &task->ssp_task;
 370                 scsi_cmnd = ssp_task->cmd;
 371
 372                 if (scsi_prot_sg_count(scsi_cmnd)) {
 373                         *n_elem_dif = dma_map_sg(dev,
 374                                                  scsi_prot_sglist(scsi_cmnd),
 375                                                  scsi_prot_sg_count(scsi_cmnd),
 376                                                  task->data_dir);
 377
 378                         if (!*n_elem_dif)
 379                                 return -ENOMEM;
 380
 381                         if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
 382                                 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
 383                                         *n_elem_dif);
 384                                 rc = -EINVAL;
 385                                 goto err_out_dif_dma_unmap;
 386                         }
 387                 }
 388         }
 389
 390         return 0;
 391
 392 err_out_dif_dma_unmap:
 393         dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 394                      scsi_prot_sg_count(scsi_cmnd), task->data_dir);
 395         return rc;
 396 }
 397
 398 static
 399 void hisi_sas_task_deliver(struct hisi_hba *hisi_hba,
 400                            struct hisi_sas_slot *slot,
 401                            struct hisi_sas_dq *dq,
 402                            struct hisi_sas_device *sas_dev,
 403                            struct hisi_sas_internal_abort *abort)
 404 {
 405         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 406         int dlvry_queue_slot, dlvry_queue;
 407         struct sas_task *task = slot->task;
 408         unsigned long flags;
 409         int wr_q_index;
 410
 411         spin_lock(&dq->lock);
 412         wr_q_index = dq->wr_point;
 413         dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
 414         list_add_tail(&slot->delivery, &dq->list);
 415         spin_unlock(&dq->lock);
 416         spin_lock(&sas_dev->lock);
 417         list_add_tail(&slot->entry, &sas_dev->list);
 418         spin_unlock(&sas_dev->lock);
 419
 420         dlvry_queue = dq->id;
 421         dlvry_queue_slot = wr_q_index;
 422
 423         slot->device_id = sas_dev->device_id;
 424         slot->dlvry_queue = dlvry_queue;
 425         slot->dlvry_queue_slot = dlvry_queue_slot;
 426         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 427         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 428
 429         task->lldd_task = slot;
 430
 431         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 432         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
 433         memset(hisi_sas_status_buf_addr_mem(slot), 0,
 434                sizeof(struct hisi_sas_err_record));
 435
 436         switch (task->task_proto) {
 437         case SAS_PROTOCOL_SMP:
 438                 hisi_sas_task_prep_smp(hisi_hba, slot);
 439                 break;
 440         case SAS_PROTOCOL_SSP:
 441                 hisi_sas_task_prep_ssp(hisi_hba, slot);
 442                 break;
 443         case SAS_PROTOCOL_SATA:
 444         case SAS_PROTOCOL_STP:
 445         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 446                 hisi_sas_task_prep_ata(hisi_hba, slot);
 447                 break;
 448         case SAS_PROTOCOL_NONE:
 449                 if (abort) {
 450                         hisi_sas_task_prep_abort(hisi_hba, abort, slot, sas_dev->device_id);
 451                         break;
 452                 }
 453         fallthrough;
 454         default:
 455                 dev_err(hisi_hba->dev, "task prep: unknown/unsupported proto (0x%x)\n",
 456                         task->task_proto);
 457                 break;
 458         }
 459
 460         spin_lock_irqsave(&task->task_state_lock, flags);
 461         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 462         spin_unlock_irqrestore(&task->task_state_lock, flags);
 463
 464         WRITE_ONCE(slot->ready, 1);
 465
 466         spin_lock(&dq->lock);
 467         hisi_hba->hw->start_delivery(dq);
 468         spin_unlock(&dq->lock);
 469 }
 470
 471 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
 472                               struct hisi_sas_tmf_task *tmf)
 473 {
 474         int n_elem = 0, n_elem_dif = 0, n_elem_req = 0;
 475         struct domain_device *device = task->dev;
 476         struct asd_sas_port *sas_port = device->port;
 477         struct hisi_sas_device *sas_dev = device->lldd_dev;
 478         struct scsi_cmnd *scmd = NULL;
 479         struct hisi_sas_dq *dq = NULL;
 480         struct hisi_sas_port *port;
 481         struct hisi_hba *hisi_hba;
 482         struct hisi_sas_slot *slot;
 483         struct device *dev;
 484         int rc;
 485
 486         if (!sas_port) {
 487                 struct task_status_struct *ts = &task->task_status;
 488
 489                 ts->resp = SAS_TASK_UNDELIVERED;
 490                 ts->stat = SAS_PHY_DOWN;
 491                 /*
 492                  * libsas will use dev->port, should
 493                  * not call task_done for sata
 494                  */
 495                 if (device->dev_type != SAS_SATA_DEV)
 496                         task->task_done(task);
 497                 return -ECOMM;
 498         }
 499
 500         hisi_hba = dev_to_hisi_hba(device);
 501         dev = hisi_hba->dev;
 502
 503         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
 504                 if (!gfpflags_allow_blocking(gfp_flags))
 505                         return -EINVAL;
 506
 507                 down(&hisi_hba->sem);
 508                 up(&hisi_hba->sem);
 509         }
 510
 511         if (DEV_IS_GONE(sas_dev)) {
 512                 if (sas_dev)
 513                         dev_info(dev, "task prep: device %d not ready\n",
 514                                  sas_dev->device_id);
 515                 else
 516                         dev_info(dev, "task prep: device %016llx not ready\n",
 517                                  SAS_ADDR(device->sas_addr));
 518
 519                 return -ECOMM;
 520         }
 521
 522         if (task->uldd_task) {
 523                 struct ata_queued_cmd *qc;
 524
 525                 if (dev_is_sata(device)) {
 526                         qc = task->uldd_task;
 527                         scmd = qc->scsicmd;
 528                 } else {
 529                         scmd = task->uldd_task;
 530                 }
 531         }
 532
 533         if (scmd) {
 534                 unsigned int dq_index;
 535                 u32 blk_tag;
 536
 537                 blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
 538                 dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
 539                 dq = &hisi_hba->dq[dq_index];
 540         } else {
 541                 struct Scsi_Host *shost = hisi_hba->shost;
 542                 struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
 543                 int queue = qmap->mq_map[raw_smp_processor_id()];
 544
 545                 dq = &hisi_hba->dq[queue];
 546         }
 547
 548         port = to_hisi_sas_port(sas_port);
 549         if (port && !port->port_attached) {
 550                 dev_info(dev, "task prep: %s port%d not attach device\n",
 551                          (dev_is_sata(device)) ?
 552                          "SATA/STP" : "SAS",
 553                          device->port->id);
 554
 555                 return -ECOMM;
 556         }
 557
 558         rc = hisi_sas_dma_map(hisi_hba, task, &n_elem,
 559                               &n_elem_req);
 560         if (rc < 0)
 561                 goto prep_out;
 562
 563         if (!sas_protocol_ata(task->task_proto)) {
 564                 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
 565                 if (rc < 0)
 566                         goto err_out_dma_unmap;
 567         }
 568
 569         if (hisi_hba->hw->slot_index_alloc)
 570                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
 571         else
 572                 rc = hisi_sas_slot_index_alloc(hisi_hba, scmd);
 573
 574         if (rc < 0)
 575                 goto err_out_dif_dma_unmap;
 576
 577         slot = &hisi_hba->slot_info[rc];
 578         slot->n_elem = n_elem;
 579         slot->n_elem_dif = n_elem_dif;
 580         slot->task = task;
 581         slot->port = port;
 582
 583         slot->tmf = tmf;
 584         slot->is_internal = tmf;
 585
 586         /* protect task_prep and start_delivery sequence */
 587         hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev, NULL);
 588
 589         return 0;
 590
 591 err_out_dif_dma_unmap:
 592         if (!sas_protocol_ata(task->task_proto))
 593                 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
 594 err_out_dma_unmap:
 595         hisi_sas_dma_unmap(hisi_hba, task, n_elem,
 596                                    n_elem_req);
 597 prep_out:
 598         dev_err(dev, "task exec: failed[%d]!\n", rc);
 599         return rc;
 600 }
 601
 602 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no,
 603                                  gfp_t gfp_flags)
 604 {
 605         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 606         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 607
 608         if (!phy->phy_attached)
 609                 return;
 610
 611         sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
 612
 613         if (sas_phy->phy) {
 614                 struct sas_phy *sphy = sas_phy->phy;
 615
 616                 sphy->negotiated_linkrate = sas_phy->linkrate;
 617                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 618                 sphy->maximum_linkrate_hw =
 619                         hisi_hba->hw->phy_get_max_linkrate();
 620                 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
 621                         sphy->minimum_linkrate = phy->minimum_linkrate;
 622
 623                 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
 624                         sphy->maximum_linkrate = phy->maximum_linkrate;
 625         }
 626
 627         if (phy->phy_type & PORT_TYPE_SAS) {
 628                 struct sas_identify_frame *id;
 629
 630                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 631                 id->dev_type = phy->identify.device_type;
 632                 id->initiator_bits = SAS_PROTOCOL_ALL;
 633                 id->target_bits = phy->identify.target_port_protocols;
 634         } else if (phy->phy_type & PORT_TYPE_SATA) {
 635                 /* Nothing */
 636         }
 637
 638         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 639         sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
 640 }
 641
 642 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 643 {
 644         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 645         struct hisi_sas_device *sas_dev = NULL;
 646         int last = hisi_hba->last_dev_id;
 647         int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
 648         int i;
 649
 650         spin_lock(&hisi_hba->lock);
 651         for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
 652                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 653                         int queue = i % hisi_hba->queue_count;
 654                         struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
 655
 656                         hisi_hba->devices[i].device_id = i;
 657                         sas_dev = &hisi_hba->devices[i];
 658                         sas_dev->dev_status = HISI_SAS_DEV_INIT;
 659                         sas_dev->dev_type = device->dev_type;
 660                         sas_dev->hisi_hba = hisi_hba;
 661                         sas_dev->sas_device = device;
 662                         sas_dev->dq = dq;
 663                         spin_lock_init(&sas_dev->lock);
 664                         INIT_LIST_HEAD(&hisi_hba->devices[i].list);
 665                         break;
 666                 }
 667                 i++;
 668         }
 669         hisi_hba->last_dev_id = i;
 670         spin_unlock(&hisi_hba->lock);
 671
 672         return sas_dev;
 673 }
 674
 675 #define HISI_SAS_DISK_RECOVER_CNT 3
 676 static int hisi_sas_init_device(struct domain_device *device)
 677 {
 678         int rc = TMF_RESP_FUNC_COMPLETE;
 679         struct scsi_lun lun;
 680         struct hisi_sas_tmf_task tmf_task;
 681         int retry = HISI_SAS_DISK_RECOVER_CNT;
 682         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 683         struct device *dev = hisi_hba->dev;
 684         struct sas_phy *local_phy;
 685
 686         switch (device->dev_type) {
 687         case SAS_END_DEVICE:
 688                 int_to_scsilun(0, &lun);
 689
 690                 tmf_task.tmf = TMF_CLEAR_TASK_SET;
 691                 while (retry-- > 0) {
 692                         rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
 693                                                           &tmf_task);
 694                         if (rc == TMF_RESP_FUNC_COMPLETE) {
 695                                 hisi_sas_release_task(hisi_hba, device);
 696                                 break;
 697                         }
 698                 }
 699                 break;
 700         case SAS_SATA_DEV:
 701         case SAS_SATA_PM:
 702         case SAS_SATA_PM_PORT:
 703         case SAS_SATA_PENDING:
 704                 /*
 705                  * send HARD RESET to clear previous affiliation of
 706                  * STP target port
 707                  */
 708                 local_phy = sas_get_local_phy(device);
 709                 if (!scsi_is_sas_phy_local(local_phy) &&
 710                     !test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
 711                         unsigned long deadline = ata_deadline(jiffies, 20000);
 712                         struct sata_device *sata_dev = &device->sata_dev;
 713                         struct ata_host *ata_host = sata_dev->ata_host;
 714                         struct ata_port_operations *ops = ata_host->ops;
 715                         struct ata_port *ap = sata_dev->ap;
 716                         struct ata_link *link;
 717                         unsigned int classes;
 718
 719                         ata_for_each_link(link, ap, EDGE)
 720                                 rc = ops->hardreset(link, &classes,
 721                                                     deadline);
 722                 }
 723                 sas_put_local_phy(local_phy);
 724                 if (rc) {
 725                         dev_warn(dev, "SATA disk hardreset fail: %d\n", rc);
 726                         return rc;
 727                 }
 728
 729                 while (retry-- > 0) {
 730                         rc = hisi_sas_softreset_ata_disk(device);
 731                         if (!rc)
 732                                 break;
 733                 }
 734                 break;
 735         default:
 736                 break;
 737         }
 738
 739         return rc;
 740 }
 741
 742 int hisi_sas_slave_alloc(struct scsi_device *sdev)
 743 {
 744         struct domain_device *ddev;
 745         int rc;
 746
 747         rc = sas_slave_alloc(sdev);
 748         if (rc)
 749                 return rc;
 750         ddev = sdev_to_domain_dev(sdev);
 751
 752         return hisi_sas_init_device(ddev);
 753 }
 754 EXPORT_SYMBOL_GPL(hisi_sas_slave_alloc);
 755
 756 static int hisi_sas_dev_found(struct domain_device *device)
 757 {
 758         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 759         struct domain_device *parent_dev = device->parent;
 760         struct hisi_sas_device *sas_dev;
 761         struct device *dev = hisi_hba->dev;
 762         int rc;
 763
 764         if (hisi_hba->hw->alloc_dev)
 765                 sas_dev = hisi_hba->hw->alloc_dev(device);
 766         else
 767                 sas_dev = hisi_sas_alloc_dev(device);
 768         if (!sas_dev) {
 769                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 770                         HISI_SAS_MAX_DEVICES);
 771                 return -EINVAL;
 772         }
 773
 774         device->lldd_dev = sas_dev;
 775         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 776
 777         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 778                 int phy_no;
 779                 u8 phy_num = parent_dev->ex_dev.num_phys;
 780                 struct ex_phy *phy;
 781
 782                 for (phy_no = 0; phy_no < phy_num; phy_no++) {
 783                         phy = &parent_dev->ex_dev.ex_phy[phy_no];
 784                         if (SAS_ADDR(phy->attached_sas_addr) ==
 785                                 SAS_ADDR(device->sas_addr))
 786                                 break;
 787                 }
 788
 789                 if (phy_no == phy_num) {
 790                         dev_info(dev, "dev found: no attached "
 791                                  "dev:%016llx at ex:%016llx\n",
 792                                  SAS_ADDR(device->sas_addr),
 793                                  SAS_ADDR(parent_dev->sas_addr));
 794                         rc = -EINVAL;
 795                         goto err_out;
 796                 }
 797         }
 798
 799         dev_info(dev, "dev[%d:%x] found\n",
 800                 sas_dev->device_id, sas_dev->dev_type);
 801
 802         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 803         return 0;
 804
 805 err_out:
 806         hisi_sas_dev_gone(device);
 807         return rc;
 808 }
 809
 810 int hisi_sas_slave_configure(struct scsi_device *sdev)
 811 {
 812         struct domain_device *dev = sdev_to_domain_dev(sdev);
 813         int ret = sas_slave_configure(sdev);
 814
 815         if (ret)
 816                 return ret;
 817         if (!dev_is_sata(dev))
 818                 sas_change_queue_depth(sdev, 64);
 819
 820         return 0;
 821 }
 822 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
 823
 824 void hisi_sas_scan_start(struct Scsi_Host *shost)
 825 {
 826         struct hisi_hba *hisi_hba = shost_priv(shost);
 827
 828         hisi_hba->hw->phys_init(hisi_hba);
 829 }
 830 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
 831
 832 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 833 {
 834         struct hisi_hba *hisi_hba = shost_priv(shost);
 835         struct sas_ha_struct *sha = &hisi_hba->sha;
 836
 837         /* Wait for PHY up interrupt to occur */
 838         if (time < HZ)
 839                 return 0;
 840
 841         sas_drain_work(sha);
 842         return 1;
 843 }
 844 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
 845
 846 static void hisi_sas_phyup_work_common(struct work_struct *work,
 847                 enum hisi_sas_phy_event event)
 848 {
 849         struct hisi_sas_phy *phy =
 850                 container_of(work, typeof(*phy), works[event]);
 851         struct hisi_hba *hisi_hba = phy->hisi_hba;
 852         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 853         int phy_no = sas_phy->id;
 854
 855         phy->wait_phyup_cnt = 0;
 856         if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
 857                 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
 858         hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
 859 }
 860
 861 static void hisi_sas_phyup_work(struct work_struct *work)
 862 {
 863         hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);
 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 void hisi_sas_phyup_pm_work(struct work_struct *work)
 876 {
 877         struct hisi_sas_phy *phy =
 878                 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);
 879         struct hisi_hba *hisi_hba = phy->hisi_hba;
 880         struct device *dev = hisi_hba->dev;
 881
 882         hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);
 883         pm_runtime_put_sync(dev);
 884 }
 885
 886 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
 887         [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
 888         [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
 889         [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,
 890 };
 891
 892 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
 893                                 enum hisi_sas_phy_event event)
 894 {
 895         struct hisi_hba *hisi_hba = phy->hisi_hba;
 896
 897         if (WARN_ON(event >= HISI_PHYES_NUM))
 898                 return false;
 899
 900         return queue_work(hisi_hba->wq, &phy->works[event]);
 901 }
 902 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
 903
 904 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
 905 {
 906         struct hisi_sas_phy *phy = from_timer(phy, t, timer);
 907         struct hisi_hba *hisi_hba = phy->hisi_hba;
 908         struct device *dev = hisi_hba->dev;
 909         int phy_no = phy->sas_phy.id;
 910
 911         dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
 912         hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
 913 }
 914
 915 #define HISI_SAS_WAIT_PHYUP_RETRIES     10
 916
 917 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
 918 {
 919         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 920         struct device *dev = hisi_hba->dev;
 921         unsigned long flags;
 922
 923         dev_dbg(dev, "phy%d OOB ready\n", phy_no);
 924         spin_lock_irqsave(&phy->lock, flags);
 925         if (phy->phy_attached) {
 926                 spin_unlock_irqrestore(&phy->lock, flags);
 927                 return;
 928         }
 929
 930         if (!timer_pending(&phy->timer)) {
 931                 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
 932                         phy->wait_phyup_cnt++;
 933                         phy->timer.expires = jiffies +
 934                                              HISI_SAS_WAIT_PHYUP_TIMEOUT;
 935                         add_timer(&phy->timer);
 936                         spin_unlock_irqrestore(&phy->lock, flags);
 937                         return;
 938                 }
 939
 940                 dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
 941                          phy_no, phy->wait_phyup_cnt);
 942                 phy->wait_phyup_cnt = 0;
 943         }
 944         spin_unlock_irqrestore(&phy->lock, flags);
 945 }
 946
 947 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
 948
 949 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
 950 {
 951         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 952         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 953         int i;
 954
 955         phy->hisi_hba = hisi_hba;
 956         phy->port = NULL;
 957         phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
 958         phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
 959         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 960         sas_phy->class = SAS;
 961         sas_phy->iproto = SAS_PROTOCOL_ALL;
 962         sas_phy->tproto = 0;
 963         sas_phy->type = PHY_TYPE_PHYSICAL;
 964         sas_phy->role = PHY_ROLE_INITIATOR;
 965         sas_phy->oob_mode = OOB_NOT_CONNECTED;
 966         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 967         sas_phy->id = phy_no;
 968         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
 969         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
 970         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
 971         sas_phy->lldd_phy = phy;
 972
 973         for (i = 0; i < HISI_PHYES_NUM; i++)
 974                 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
 975
 976         spin_lock_init(&phy->lock);
 977
 978         timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
 979 }
 980
 981 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
 982 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
 983 {
 984         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 985         struct asd_sas_phy *aphy = &phy->sas_phy;
 986         struct sas_phy *sphy = aphy->phy;
 987         unsigned long flags;
 988
 989         spin_lock_irqsave(&phy->lock, flags);
 990
 991         if (enable) {
 992                 /* We may have been enabled already; if so, don't touch */
 993                 if (!phy->enable)
 994                         sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
 995                 hisi_hba->hw->phy_start(hisi_hba, phy_no);
 996         } else {
 997                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
 998                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 999         }
1000         phy->enable = enable;
1001         spin_unlock_irqrestore(&phy->lock, flags);
1002 }
1003 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
1004
1005 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
1006 {
1007         struct sas_ha_struct *sas_ha = sas_phy->ha;
1008         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1009         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1010         struct asd_sas_port *sas_port = sas_phy->port;
1011         struct hisi_sas_port *port;
1012         unsigned long flags;
1013
1014         if (!sas_port)
1015                 return;
1016
1017         port = to_hisi_sas_port(sas_port);
1018         spin_lock_irqsave(&hisi_hba->lock, flags);
1019         port->port_attached = 1;
1020         port->id = phy->port_id;
1021         phy->port = port;
1022         sas_port->lldd_port = port;
1023         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1024 }
1025
1026 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1027                                      struct hisi_sas_slot *slot)
1028 {
1029         if (task) {
1030                 unsigned long flags;
1031                 struct task_status_struct *ts;
1032
1033                 ts = &task->task_status;
1034
1035                 ts->resp = SAS_TASK_COMPLETE;
1036                 ts->stat = SAS_ABORTED_TASK;
1037                 spin_lock_irqsave(&task->task_state_lock, flags);
1038                 task->task_state_flags &=
1039                         ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1040                 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1041                         task->task_state_flags |= SAS_TASK_STATE_DONE;
1042                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1043         }
1044
1045         hisi_sas_slot_task_free(hisi_hba, task, slot);
1046 }
1047
1048 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1049                         struct domain_device *device)
1050 {
1051         struct hisi_sas_slot *slot, *slot2;
1052         struct hisi_sas_device *sas_dev = device->lldd_dev;
1053
1054         list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1055                 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
1056 }
1057
1058 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1059 {
1060         struct hisi_sas_device *sas_dev;
1061         struct domain_device *device;
1062         int i;
1063
1064         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1065                 sas_dev = &hisi_hba->devices[i];
1066                 device = sas_dev->sas_device;
1067
1068                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1069                     !device)
1070                         continue;
1071
1072                 hisi_sas_release_task(hisi_hba, device);
1073         }
1074 }
1075 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1076
1077 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1078                                 struct domain_device *device)
1079 {
1080         if (hisi_hba->hw->dereg_device)
1081                 hisi_hba->hw->dereg_device(hisi_hba, device);
1082 }
1083
1084 static void hisi_sas_dev_gone(struct domain_device *device)
1085 {
1086         struct hisi_sas_device *sas_dev = device->lldd_dev;
1087         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1088         struct device *dev = hisi_hba->dev;
1089         int ret = 0;
1090
1091         dev_info(dev, "dev[%d:%x] is gone\n",
1092                  sas_dev->device_id, sas_dev->dev_type);
1093
1094         down(&hisi_hba->sem);
1095         if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1096                 hisi_sas_internal_task_abort(hisi_hba, device,
1097                                              HISI_SAS_INT_ABT_DEV, 0, true);
1098
1099                 hisi_sas_dereg_device(hisi_hba, device);
1100
1101                 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1102                 device->lldd_dev = NULL;
1103         }
1104
1105         if (hisi_hba->hw->free_device)
1106                 hisi_hba->hw->free_device(sas_dev);
1107
1108         /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1109         if (!ret)
1110                 sas_dev->dev_type = SAS_PHY_UNUSED;
1111         sas_dev->sas_device = NULL;
1112         up(&hisi_hba->sem);
1113 }
1114
1115 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
1116 {
1117         return hisi_sas_task_exec(task, gfp_flags, NULL);
1118 }
1119
1120 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1121                         struct sas_phy_linkrates *r)
1122 {
1123         struct sas_phy_linkrates _r;
1124
1125         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1126         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1127         enum sas_linkrate min, max;
1128
1129         if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1130                 return -EINVAL;
1131
1132         if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1133                 max = sas_phy->phy->maximum_linkrate;
1134                 min = r->minimum_linkrate;
1135         } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1136                 max = r->maximum_linkrate;
1137                 min = sas_phy->phy->minimum_linkrate;
1138         } else
1139                 return -EINVAL;
1140
1141         _r.maximum_linkrate = max;
1142         _r.minimum_linkrate = min;
1143
1144         sas_phy->phy->maximum_linkrate = max;
1145         sas_phy->phy->minimum_linkrate = min;
1146
1147         hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1148         msleep(100);
1149         hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1150         hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1151
1152         return 0;
1153 }
1154
1155 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1156                                 void *funcdata)
1157 {
1158         struct hisi_sas_phy *phy = container_of(sas_phy,
1159                         struct hisi_sas_phy, sas_phy);
1160         struct sas_ha_struct *sas_ha = sas_phy->ha;
1161         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1162         struct device *dev = hisi_hba->dev;
1163         DECLARE_COMPLETION_ONSTACK(completion);
1164         int phy_no = sas_phy->id;
1165         u8 sts = phy->phy_attached;
1166         int ret = 0;
1167
1168         down(&hisi_hba->sem);
1169         phy->reset_completion = &completion;
1170
1171         switch (func) {
1172         case PHY_FUNC_HARD_RESET:
1173                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1174                 break;
1175
1176         case PHY_FUNC_LINK_RESET:
1177                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1178                 msleep(100);
1179                 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1180                 break;
1181
1182         case PHY_FUNC_DISABLE:
1183                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1184                 goto out;
1185
1186         case PHY_FUNC_SET_LINK_RATE:
1187                 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1188                 break;
1189
1190         case PHY_FUNC_GET_EVENTS:
1191                 if (hisi_hba->hw->get_events) {
1192                         hisi_hba->hw->get_events(hisi_hba, phy_no);
1193                         goto out;
1194                 }
1195                 fallthrough;
1196         case PHY_FUNC_RELEASE_SPINUP_HOLD:
1197         default:
1198                 ret = -EOPNOTSUPP;
1199                 goto out;
1200         }
1201
1202         if (sts && !wait_for_completion_timeout(&completion, 2 * HZ)) {
1203                 dev_warn(dev, "phy%d wait phyup timed out for func %d\n",
1204                          phy_no, func);
1205                 if (phy->in_reset)
1206                         ret = -ETIMEDOUT;
1207         }
1208
1209 out:
1210         phy->reset_completion = NULL;
1211
1212         up(&hisi_hba->sem);
1213         return ret;
1214 }
1215
1216 static void hisi_sas_task_done(struct sas_task *task)
1217 {
1218         del_timer_sync(&task->slow_task->timer);
1219         complete(&task->slow_task->completion);
1220 }
1221
1222 static void hisi_sas_tmf_timedout(struct timer_list *t)
1223 {
1224         struct sas_task_slow *slow = from_timer(slow, t, timer);
1225         struct sas_task *task = slow->task;
1226         unsigned long flags;
1227         bool is_completed = true;
1228
1229         spin_lock_irqsave(&task->task_state_lock, flags);
1230         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1231                 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1232                 is_completed = false;
1233         }
1234         spin_unlock_irqrestore(&task->task_state_lock, flags);
1235
1236         if (!is_completed)
1237                 complete(&task->slow_task->completion);
1238 }
1239
1240 #define TASK_TIMEOUT                    (20 * HZ)
1241 #define TASK_RETRY                      3
1242 #define INTERNAL_ABORT_TIMEOUT          (6 * HZ)
1243 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
1244                                            void *parameter, u32 para_len,
1245                                            struct hisi_sas_tmf_task *tmf)
1246 {
1247         struct hisi_sas_device *sas_dev = device->lldd_dev;
1248         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1249         struct device *dev = hisi_hba->dev;
1250         struct sas_task *task;
1251         int res, retry;
1252
1253         for (retry = 0; retry < TASK_RETRY; retry++) {
1254                 task = sas_alloc_slow_task(GFP_KERNEL);
1255                 if (!task)
1256                         return -ENOMEM;
1257
1258                 task->dev = device;
1259                 task->task_proto = device->tproto;
1260
1261                 if (dev_is_sata(device)) {
1262                         task->ata_task.device_control_reg_update = 1;
1263                         memcpy(&task->ata_task.fis, parameter, para_len);
1264                 } else {
1265                         memcpy(&task->ssp_task, parameter, para_len);
1266                 }
1267                 task->task_done = hisi_sas_task_done;
1268
1269                 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1270                 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT;
1271                 add_timer(&task->slow_task->timer);
1272
1273                 res = hisi_sas_task_exec(task, GFP_KERNEL, tmf);
1274                 if (res) {
1275                         del_timer_sync(&task->slow_task->timer);
1276                         dev_err(dev, "abort tmf: executing internal task failed: %d\n",
1277                                 res);
1278                         goto ex_err;
1279                 }
1280
1281                 wait_for_completion(&task->slow_task->completion);
1282                 res = TMF_RESP_FUNC_FAILED;
1283                 /* Even TMF timed out, return direct. */
1284                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1285                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1286                                 struct hisi_sas_slot *slot = task->lldd_task;
1287
1288                                 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1289                                 if (slot) {
1290                                         struct hisi_sas_cq *cq =
1291                                                &hisi_hba->cq[slot->dlvry_queue];
1292                                         /*
1293                                          * sync irq to avoid free'ing task
1294                                          * before using task in IO completion
1295                                          */
1296                                         synchronize_irq(cq->irq_no);
1297                                         slot->task = NULL;
1298                                 }
1299
1300                                 goto ex_err;
1301                         } else
1302                                 dev_err(dev, "abort tmf: TMF task timeout\n");
1303                 }
1304
1305                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1306                      task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1307                         res = TMF_RESP_FUNC_COMPLETE;
1308                         break;
1309                 }
1310
1311                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1312                         task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1313                         res = TMF_RESP_FUNC_SUCC;
1314                         break;
1315                 }
1316
1317                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1318                       task->task_status.stat == SAS_DATA_UNDERRUN) {
1319                         /* no error, but return the number of bytes of
1320                          * underrun
1321                          */
1322                         dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x sts 0x%x underrun\n",
1323                                  SAS_ADDR(device->sas_addr),
1324                                  task->task_status.resp,
1325                                  task->task_status.stat);
1326                         res = task->task_status.residual;
1327                         break;
1328                 }
1329
1330                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1331                         task->task_status.stat == SAS_DATA_OVERRUN) {
1332                         dev_warn(dev, "abort tmf: blocked task error\n");
1333                         res = -EMSGSIZE;
1334                         break;
1335                 }
1336
1337                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1338                     task->task_status.stat == SAS_OPEN_REJECT) {
1339                         dev_warn(dev, "abort tmf: open reject failed\n");
1340                         res = -EIO;
1341                 } else {
1342                         dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x status 0x%x\n",
1343                                  SAS_ADDR(device->sas_addr),
1344                                  task->task_status.resp,
1345                                  task->task_status.stat);
1346                 }
1347                 sas_free_task(task);
1348                 task = NULL;
1349         }
1350 ex_err:
1351         if (retry == TASK_RETRY)
1352                 dev_warn(dev, "abort tmf: executing internal task failed!\n");
1353         sas_free_task(task);
1354         return res;
1355 }
1356
1357 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1358                 bool reset, int pmp, u8 *fis)
1359 {
1360         struct ata_taskfile tf;
1361
1362         ata_tf_init(dev, &tf);
1363         if (reset)
1364                 tf.ctl |= ATA_SRST;
1365         else
1366                 tf.ctl &= ~ATA_SRST;
1367         tf.command = ATA_CMD_DEV_RESET;
1368         ata_tf_to_fis(&tf, pmp, 0, fis);
1369 }
1370
1371 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1372 {
1373         u8 fis[20] = {0};
1374         struct ata_port *ap = device->sata_dev.ap;
1375         struct ata_link *link;
1376         int rc = TMF_RESP_FUNC_FAILED;
1377         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1378         struct device *dev = hisi_hba->dev;
1379         int s = sizeof(struct host_to_dev_fis);
1380         struct hisi_sas_tmf_task tmf = {};
1381
1382         ata_for_each_link(link, ap, EDGE) {
1383                 int pmp = sata_srst_pmp(link);
1384
1385                 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1386                 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, &tmf);
1387                 if (rc != TMF_RESP_FUNC_COMPLETE)
1388                         break;
1389         }
1390
1391         if (rc == TMF_RESP_FUNC_COMPLETE) {
1392                 ata_for_each_link(link, ap, EDGE) {
1393                         int pmp = sata_srst_pmp(link);
1394
1395                         hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1396                         rc = hisi_sas_exec_internal_tmf_task(device, fis,
1397                                                              s, &tmf);
1398                         if (rc != TMF_RESP_FUNC_COMPLETE)
1399                                 dev_err(dev, "ata disk %016llx de-reset failed\n",
1400                                         SAS_ADDR(device->sas_addr));
1401                 }
1402         } else {
1403                 dev_err(dev, "ata disk %016llx reset failed\n",
1404                         SAS_ADDR(device->sas_addr));
1405         }
1406
1407         if (rc == TMF_RESP_FUNC_COMPLETE)
1408                 hisi_sas_release_task(hisi_hba, device);
1409
1410         return rc;
1411 }
1412
1413 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1414                                 u8 *lun, struct hisi_sas_tmf_task *tmf)
1415 {
1416         struct sas_ssp_task ssp_task;
1417
1418         if (!(device->tproto & SAS_PROTOCOL_SSP))
1419                 return TMF_RESP_FUNC_ESUPP;
1420
1421         memcpy(ssp_task.LUN, lun, 8);
1422
1423         return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1424                                 sizeof(ssp_task), tmf);
1425 }
1426
1427 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1428 {
1429         u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1430         int i;
1431
1432         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1433                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1434                 struct domain_device *device = sas_dev->sas_device;
1435                 struct asd_sas_port *sas_port;
1436                 struct hisi_sas_port *port;
1437                 struct hisi_sas_phy *phy = NULL;
1438                 struct asd_sas_phy *sas_phy;
1439
1440                 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1441                                 || !device || !device->port)
1442                         continue;
1443
1444                 sas_port = device->port;
1445                 port = to_hisi_sas_port(sas_port);
1446
1447                 spin_lock(&sas_port->phy_list_lock);
1448                 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1449                         if (state & BIT(sas_phy->id)) {
1450                                 phy = sas_phy->lldd_phy;
1451                                 break;
1452                         }
1453                 spin_unlock(&sas_port->phy_list_lock);
1454
1455                 if (phy) {
1456                         port->id = phy->port_id;
1457
1458                         /* Update linkrate of directly attached device. */
1459                         if (!device->parent)
1460                                 device->linkrate = phy->sas_phy.linkrate;
1461
1462                         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1463                 } else
1464                         port->id = 0xff;
1465         }
1466 }
1467
1468 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1469 {
1470         struct asd_sas_port *_sas_port = NULL;
1471         int phy_no;
1472
1473         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1474                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1475                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1476                 struct asd_sas_port *sas_port = sas_phy->port;
1477                 bool do_port_check = _sas_port != sas_port;
1478
1479                 if (!sas_phy->phy->enabled)
1480                         continue;
1481
1482                 /* Report PHY state change to libsas */
1483                 if (state & BIT(phy_no)) {
1484                         if (do_port_check && sas_port && sas_port->port_dev) {
1485                                 struct domain_device *dev = sas_port->port_dev;
1486
1487                                 _sas_port = sas_port;
1488
1489                                 if (dev_is_expander(dev->dev_type))
1490                                         sas_notify_port_event(sas_phy,
1491                                                         PORTE_BROADCAST_RCVD,
1492                                                         GFP_KERNEL);
1493                         }
1494                 } else {
1495                         hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1496                 }
1497         }
1498 }
1499
1500 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1501 {
1502         struct hisi_sas_device *sas_dev;
1503         struct domain_device *device;
1504         int i;
1505
1506         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1507                 sas_dev = &hisi_hba->devices[i];
1508                 device = sas_dev->sas_device;
1509
1510                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1511                         continue;
1512
1513                 hisi_sas_init_device(device);
1514         }
1515 }
1516
1517 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1518                                              struct asd_sas_port *sas_port,
1519                                              struct domain_device *device)
1520 {
1521         struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
1522         struct ata_port *ap = device->sata_dev.ap;
1523         struct device *dev = hisi_hba->dev;
1524         int s = sizeof(struct host_to_dev_fis);
1525         int rc = TMF_RESP_FUNC_FAILED;
1526         struct ata_link *link;
1527         u8 fis[20] = {0};
1528         int i;
1529
1530         for (i = 0; i < hisi_hba->n_phy; i++) {
1531                 if (!(sas_port->phy_mask & BIT(i)))
1532                         continue;
1533
1534                 ata_for_each_link(link, ap, EDGE) {
1535                         int pmp = sata_srst_pmp(link);
1536
1537                         tmf_task.phy_id = i;
1538                         hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1539                         rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
1540                                                              &tmf_task);
1541                         if (rc != TMF_RESP_FUNC_COMPLETE) {
1542                                 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1543                                         i, rc);
1544                                 break;
1545                         }
1546                 }
1547         }
1548 }
1549
1550 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1551 {
1552         struct device *dev = hisi_hba->dev;
1553         int port_no, rc, i;
1554
1555         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1556                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1557                 struct domain_device *device = sas_dev->sas_device;
1558
1559                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1560                         continue;
1561
1562                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1563                                                   HISI_SAS_INT_ABT_DEV, 0,
1564                                                   false);
1565                 if (rc < 0)
1566                         dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1567         }
1568
1569         for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1570                 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1571                 struct asd_sas_port *sas_port = &port->sas_port;
1572                 struct domain_device *port_dev = sas_port->port_dev;
1573                 struct domain_device *device;
1574
1575                 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1576                         continue;
1577
1578                 /* Try to find a SATA device */
1579                 list_for_each_entry(device, &sas_port->dev_list,
1580                                     dev_list_node) {
1581                         if (dev_is_sata(device)) {
1582                                 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1583                                                                  sas_port,
1584                                                                  device);
1585                                 break;
1586                         }
1587                 }
1588         }
1589 }
1590
1591 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1592 {
1593         struct Scsi_Host *shost = hisi_hba->shost;
1594
1595         hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1596
1597         scsi_block_requests(shost);
1598         hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1599
1600         del_timer_sync(&hisi_hba->timer);
1601
1602         set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1603 }
1604 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1605
1606 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1607 {
1608         struct Scsi_Host *shost = hisi_hba->shost;
1609
1610         /* Init and wait for PHYs to come up and all libsas event finished. */
1611         hisi_hba->hw->phys_init(hisi_hba);
1612         msleep(1000);
1613         hisi_sas_refresh_port_id(hisi_hba);
1614         clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1615
1616         if (hisi_hba->reject_stp_links_msk)
1617                 hisi_sas_terminate_stp_reject(hisi_hba);
1618         hisi_sas_reset_init_all_devices(hisi_hba);
1619         scsi_unblock_requests(shost);
1620         clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1621         up(&hisi_hba->sem);
1622
1623         hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1624 }
1625 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1626
1627 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1628 {
1629         if (!hisi_hba->hw->soft_reset)
1630                 return -1;
1631
1632         down(&hisi_hba->sem);
1633         if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1634                 up(&hisi_hba->sem);
1635                 return -1;
1636         }
1637
1638         if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1639                 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1640
1641         return 0;
1642 }
1643
1644 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1645 {
1646         struct device *dev = hisi_hba->dev;
1647         struct Scsi_Host *shost = hisi_hba->shost;
1648         int rc;
1649
1650         dev_info(dev, "controller resetting...\n");
1651         hisi_sas_controller_reset_prepare(hisi_hba);
1652
1653         rc = hisi_hba->hw->soft_reset(hisi_hba);
1654         if (rc) {
1655                 dev_warn(dev, "controller reset failed (%d)\n", rc);
1656                 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1657                 up(&hisi_hba->sem);
1658                 scsi_unblock_requests(shost);
1659                 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1660                 return rc;
1661         }
1662
1663         hisi_sas_controller_reset_done(hisi_hba);
1664         clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1665         dev_info(dev, "controller reset complete\n");
1666
1667         return 0;
1668 }
1669
1670 static int hisi_sas_abort_task(struct sas_task *task)
1671 {
1672         struct scsi_lun lun;
1673         struct hisi_sas_tmf_task tmf_task;
1674         struct domain_device *device = task->dev;
1675         struct hisi_sas_device *sas_dev = device->lldd_dev;
1676         struct hisi_hba *hisi_hba;
1677         struct device *dev;
1678         int rc = TMF_RESP_FUNC_FAILED;
1679         unsigned long flags;
1680
1681         if (!sas_dev)
1682                 return TMF_RESP_FUNC_FAILED;
1683
1684         hisi_hba = dev_to_hisi_hba(task->dev);
1685         dev = hisi_hba->dev;
1686
1687         spin_lock_irqsave(&task->task_state_lock, flags);
1688         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1689                 struct hisi_sas_slot *slot = task->lldd_task;
1690                 struct hisi_sas_cq *cq;
1691
1692                 if (slot) {
1693                         /*
1694                          * sync irq to avoid free'ing task
1695                          * before using task in IO completion
1696                          */
1697                         cq = &hisi_hba->cq[slot->dlvry_queue];
1698                         synchronize_irq(cq->irq_no);
1699                 }
1700                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1701                 rc = TMF_RESP_FUNC_COMPLETE;
1702                 goto out;
1703         }
1704         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1705         spin_unlock_irqrestore(&task->task_state_lock, flags);
1706
1707         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1708                 struct scsi_cmnd *cmnd = task->uldd_task;
1709                 struct hisi_sas_slot *slot = task->lldd_task;
1710                 u16 tag = slot->idx;
1711                 int rc2;
1712
1713                 int_to_scsilun(cmnd->device->lun, &lun);
1714                 tmf_task.tmf = TMF_ABORT_TASK;
1715                 tmf_task.tag_of_task_to_be_managed = tag;
1716
1717                 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1718                                                   &tmf_task);
1719
1720                 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1721                                                    HISI_SAS_INT_ABT_CMD, tag,
1722                                                    false);
1723                 if (rc2 < 0) {
1724                         dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1725                         return TMF_RESP_FUNC_FAILED;
1726                 }
1727
1728                 /*
1729                  * If the TMF finds that the IO is not in the device and also
1730                  * the internal abort does not succeed, then it is safe to
1731                  * free the slot.
1732                  * Note: if the internal abort succeeds then the slot
1733                  * will have already been completed
1734                  */
1735                 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1736                         if (task->lldd_task)
1737                                 hisi_sas_do_release_task(hisi_hba, task, slot);
1738                 }
1739         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1740                 task->task_proto & SAS_PROTOCOL_STP) {
1741                 if (task->dev->dev_type == SAS_SATA_DEV) {
1742                         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1743                                                           HISI_SAS_INT_ABT_DEV,
1744                                                           0, false);
1745                         if (rc < 0) {
1746                                 dev_err(dev, "abort task: internal abort failed\n");
1747                                 goto out;
1748                         }
1749                         hisi_sas_dereg_device(hisi_hba, device);
1750                         rc = hisi_sas_softreset_ata_disk(device);
1751                 }
1752         } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1753                 /* SMP */
1754                 struct hisi_sas_slot *slot = task->lldd_task;
1755                 u32 tag = slot->idx;
1756                 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1757
1758                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1759                                                   HISI_SAS_INT_ABT_CMD, tag,
1760                                                   false);
1761                 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1762                                         task->lldd_task) {
1763                         /*
1764                          * sync irq to avoid free'ing task
1765                          * before using task in IO completion
1766                          */
1767                         synchronize_irq(cq->irq_no);
1768                         slot->task = NULL;
1769                 }
1770         }
1771
1772 out:
1773         if (rc != TMF_RESP_FUNC_COMPLETE)
1774                 dev_notice(dev, "abort task: rc=%d\n", rc);
1775         return rc;
1776 }
1777
1778 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1779 {
1780         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1781         struct device *dev = hisi_hba->dev;
1782         struct hisi_sas_tmf_task tmf_task;
1783         int rc;
1784
1785         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1786                                           HISI_SAS_INT_ABT_DEV, 0, false);
1787         if (rc < 0) {
1788                 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1789                 return TMF_RESP_FUNC_FAILED;
1790         }
1791         hisi_sas_dereg_device(hisi_hba, device);
1792
1793         tmf_task.tmf = TMF_ABORT_TASK_SET;
1794         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1795
1796         if (rc == TMF_RESP_FUNC_COMPLETE)
1797                 hisi_sas_release_task(hisi_hba, device);
1798
1799         return rc;
1800 }
1801
1802 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1803 {
1804         struct hisi_sas_tmf_task tmf_task;
1805         int rc;
1806
1807         tmf_task.tmf = TMF_CLEAR_ACA;
1808         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1809
1810         return rc;
1811 }
1812
1813 #define I_T_NEXUS_RESET_PHYUP_TIMEOUT  (2 * HZ)
1814
1815 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1816 {
1817         struct sas_phy *local_phy = sas_get_local_phy(device);
1818         struct hisi_sas_device *sas_dev = device->lldd_dev;
1819         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1820         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1821         int rc, reset_type;
1822
1823         if (!local_phy->enabled) {
1824                 sas_put_local_phy(local_phy);
1825                 return -ENODEV;
1826         }
1827
1828         if (scsi_is_sas_phy_local(local_phy)) {
1829                 struct asd_sas_phy *sas_phy =
1830                         sas_ha->sas_phy[local_phy->number];
1831                 struct hisi_sas_phy *phy =
1832                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1833                 unsigned long flags;
1834
1835                 spin_lock_irqsave(&phy->lock, flags);
1836                 phy->in_reset = 1;
1837                 spin_unlock_irqrestore(&phy->lock, flags);
1838         }
1839
1840         reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1841                       !dev_is_sata(device)) ? true : false;
1842
1843         rc = sas_phy_reset(local_phy, reset_type);
1844         sas_put_local_phy(local_phy);
1845
1846         if (scsi_is_sas_phy_local(local_phy)) {
1847                 struct asd_sas_phy *sas_phy =
1848                         sas_ha->sas_phy[local_phy->number];
1849                 struct hisi_sas_phy *phy =
1850                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1851                 unsigned long flags;
1852
1853                 spin_lock_irqsave(&phy->lock, flags);
1854                 phy->in_reset = 0;
1855                 spin_unlock_irqrestore(&phy->lock, flags);
1856
1857                 /* report PHY down if timed out */
1858                 if (rc == -ETIMEDOUT)
1859                         hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1860         } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) {
1861                 /*
1862                  * If in init state, we rely on caller to wait for link to be
1863                  * ready; otherwise, except phy reset is fail, delay.
1864                  */
1865                 if (!rc)
1866                         msleep(2000);
1867         }
1868
1869         return rc;
1870 }
1871
1872 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1873 {
1874         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1875         struct device *dev = hisi_hba->dev;
1876         int rc;
1877
1878         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1879                                           HISI_SAS_INT_ABT_DEV, 0, false);
1880         if (rc < 0) {
1881                 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1882                 return TMF_RESP_FUNC_FAILED;
1883         }
1884         hisi_sas_dereg_device(hisi_hba, device);
1885
1886         rc = hisi_sas_debug_I_T_nexus_reset(device);
1887         if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) {
1888                 struct sas_phy *local_phy;
1889
1890                 rc = hisi_sas_softreset_ata_disk(device);
1891                 switch (rc) {
1892                 case -ECOMM:
1893                         rc = -ENODEV;
1894                         break;
1895                 case TMF_RESP_FUNC_FAILED:
1896                 case -EMSGSIZE:
1897                 case -EIO:
1898                         local_phy = sas_get_local_phy(device);
1899                         rc = sas_phy_enable(local_phy, 0);
1900                         if (!rc) {
1901                                 local_phy->enabled = 0;
1902                                 dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n",
1903                                         SAS_ADDR(device->sas_addr), rc);
1904                                 rc = -ENODEV;
1905                         }
1906                         sas_put_local_phy(local_phy);
1907                         break;
1908                 default:
1909                         break;
1910                 }
1911         }
1912
1913         if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1914                 hisi_sas_release_task(hisi_hba, device);
1915
1916         return rc;
1917 }
1918
1919 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1920 {
1921         struct hisi_sas_device *sas_dev = device->lldd_dev;
1922         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1923         struct device *dev = hisi_hba->dev;
1924         int rc = TMF_RESP_FUNC_FAILED;
1925
1926         /* Clear internal IO and then lu reset */
1927         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1928                                           HISI_SAS_INT_ABT_DEV, 0, false);
1929         if (rc < 0) {
1930                 dev_err(dev, "lu_reset: internal abort failed\n");
1931                 goto out;
1932         }
1933         hisi_sas_dereg_device(hisi_hba, device);
1934
1935         if (dev_is_sata(device)) {
1936                 struct sas_phy *phy;
1937
1938                 phy = sas_get_local_phy(device);
1939
1940                 rc = sas_phy_reset(phy, true);
1941
1942                 if (rc == 0)
1943                         hisi_sas_release_task(hisi_hba, device);
1944                 sas_put_local_phy(phy);
1945         } else {
1946                 struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };
1947
1948                 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1949                 if (rc == TMF_RESP_FUNC_COMPLETE)
1950                         hisi_sas_release_task(hisi_hba, device);
1951         }
1952 out:
1953         if (rc != TMF_RESP_FUNC_COMPLETE)
1954                 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1955                              sas_dev->device_id, rc);
1956         return rc;
1957 }
1958
1959 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1960 {
1961         struct domain_device *device = data;
1962         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1963         int rc;
1964
1965         rc = hisi_sas_debug_I_T_nexus_reset(device);
1966         if (rc != TMF_RESP_FUNC_COMPLETE)
1967                 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1968                          SAS_ADDR(device->sas_addr), rc);
1969 }
1970
1971 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1972 {
1973         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1974         HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1975         ASYNC_DOMAIN_EXCLUSIVE(async);
1976         int i;
1977
1978         queue_work(hisi_hba->wq, &r.work);
1979         wait_for_completion(r.completion);
1980         if (!r.done)
1981                 return TMF_RESP_FUNC_FAILED;
1982
1983         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1984                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1985                 struct domain_device *device = sas_dev->sas_device;
1986
1987                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1988                     dev_is_expander(device->dev_type))
1989                         continue;
1990
1991                 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1992                                       device, &async);
1993         }
1994
1995         async_synchronize_full_domain(&async);
1996         hisi_sas_release_tasks(hisi_hba);
1997
1998         return TMF_RESP_FUNC_COMPLETE;
1999 }
2000
2001 static int hisi_sas_query_task(struct sas_task *task)
2002 {
2003         struct scsi_lun lun;
2004         struct hisi_sas_tmf_task tmf_task;
2005         int rc = TMF_RESP_FUNC_FAILED;
2006
2007         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
2008                 struct scsi_cmnd *cmnd = task->uldd_task;
2009                 struct domain_device *device = task->dev;
2010                 struct hisi_sas_slot *slot = task->lldd_task;
2011                 u32 tag = slot->idx;
2012
2013                 int_to_scsilun(cmnd->device->lun, &lun);
2014                 tmf_task.tmf = TMF_QUERY_TASK;
2015                 tmf_task.tag_of_task_to_be_managed = tag;
2016
2017                 rc = hisi_sas_debug_issue_ssp_tmf(device,
2018                                                   lun.scsi_lun,
2019                                                   &tmf_task);
2020                 switch (rc) {
2021                 /* The task is still in Lun, release it then */
2022                 case TMF_RESP_FUNC_SUCC:
2023                 /* The task is not in Lun or failed, reset the phy */
2024                 case TMF_RESP_FUNC_FAILED:
2025                 case TMF_RESP_FUNC_COMPLETE:
2026                         break;
2027                 default:
2028                         rc = TMF_RESP_FUNC_FAILED;
2029                         break;
2030                 }
2031         }
2032         return rc;
2033 }
2034
2035 static int
2036 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
2037                                   struct hisi_sas_internal_abort *abort,
2038                                   struct sas_task *task,
2039                                   struct hisi_sas_dq *dq)
2040 {
2041         struct domain_device *device = task->dev;
2042         struct hisi_sas_device *sas_dev = device->lldd_dev;
2043         struct device *dev = hisi_hba->dev;
2044         struct hisi_sas_port *port;
2045         struct asd_sas_port *sas_port = device->port;
2046         struct hisi_sas_slot *slot;
2047         int slot_idx;
2048
2049         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
2050                 return -EINVAL;
2051
2052         if (!device->port)
2053                 return -1;
2054
2055         port = to_hisi_sas_port(sas_port);
2056
2057         /* simply get a slot and send abort command */
2058         slot_idx = hisi_sas_slot_index_alloc(hisi_hba, NULL);
2059         if (slot_idx < 0)
2060                 goto err_out;
2061
2062         slot = &hisi_hba->slot_info[slot_idx];
2063         slot->n_elem = 0;
2064         slot->task = task;
2065         slot->port = port;
2066         slot->is_internal = true;
2067
2068         hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev, abort);
2069
2070         return 0;
2071
2072 err_out:
2073         dev_err(dev, "internal abort task prep: failed[%d]!\n", slot_idx);
2074
2075         return slot_idx;
2076 }
2077
2078 /**
2079  * _hisi_sas_internal_task_abort -- execute an internal
2080  * abort command for single IO command or a device
2081  * @hisi_hba: host controller struct
2082  * @device: domain device
2083  * @abort_flag: mode of operation, device or single IO
2084  * @tag: tag of IO to be aborted (only relevant to single
2085  *       IO mode)
2086  * @dq: delivery queue for this internal abort command
2087  * @rst_to_recover: If rst_to_recover set, queue a controller
2088  *                  reset if an internal abort times out.
2089  */
2090 static int
2091 _hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2092                               struct domain_device *device, int abort_flag,
2093                               int tag, struct hisi_sas_dq *dq, bool rst_to_recover)
2094 {
2095         struct sas_task *task;
2096         struct hisi_sas_device *sas_dev = device->lldd_dev;
2097         struct hisi_sas_internal_abort abort = {
2098                 .flag = abort_flag,
2099                 .tag = tag,
2100         };
2101         struct device *dev = hisi_hba->dev;
2102         int res;
2103         /*
2104          * The interface is not realized means this HW don't support internal
2105          * abort, or don't need to do internal abort. Then here, we return
2106          * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
2107          * the internal abort has been executed and returned CQ.
2108          */
2109         if (!hisi_hba->hw->prep_abort)
2110                 return TMF_RESP_FUNC_FAILED;
2111
2112         if (test_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags))
2113                 return -EIO;
2114
2115         task = sas_alloc_slow_task(GFP_KERNEL);
2116         if (!task)
2117                 return -ENOMEM;
2118
2119         task->dev = device;
2120         task->task_proto = SAS_PROTOCOL_NONE;
2121         task->task_done = hisi_sas_task_done;
2122         task->slow_task->timer.function = hisi_sas_tmf_timedout;
2123         task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT;
2124         add_timer(&task->slow_task->timer);
2125
2126         res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
2127                                                 &abort, task, dq);
2128         if (res) {
2129                 del_timer_sync(&task->slow_task->timer);
2130                 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
2131                         res);
2132                 goto exit;
2133         }
2134         wait_for_completion(&task->slow_task->completion);
2135         res = TMF_RESP_FUNC_FAILED;
2136
2137         /* Internal abort timed out */
2138         if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
2139                 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
2140                         queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
2141
2142                 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
2143                         struct hisi_sas_slot *slot = task->lldd_task;
2144
2145                         set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
2146
2147                         if (slot) {
2148                                 struct hisi_sas_cq *cq =
2149                                         &hisi_hba->cq[slot->dlvry_queue];
2150                                 /*
2151                                  * sync irq to avoid free'ing task
2152                                  * before using task in IO completion
2153                                  */
2154                                 synchronize_irq(cq->irq_no);
2155                                 slot->task = NULL;
2156                         }
2157
2158                         if (rst_to_recover) {
2159                                 dev_err(dev, "internal task abort: timeout and not done. Queuing reset.\n");
2160                                 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2161                         } else {
2162                                 dev_err(dev, "internal task abort: timeout and not done.\n");
2163                         }
2164
2165                         res = -EIO;
2166                         goto exit;
2167                 } else
2168                         dev_err(dev, "internal task abort: timeout.\n");
2169         }
2170
2171         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2172                 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
2173                 res = TMF_RESP_FUNC_COMPLETE;
2174                 goto exit;
2175         }
2176
2177         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2178                 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
2179                 res = TMF_RESP_FUNC_SUCC;
2180                 goto exit;
2181         }
2182
2183 exit:
2184         dev_dbg(dev, "internal task abort: task to dev %016llx task=%pK resp: 0x%x sts 0x%x\n",
2185                 SAS_ADDR(device->sas_addr), task,
2186                 task->task_status.resp, /* 0 is complete, -1 is undelivered */
2187                 task->task_status.stat);
2188         sas_free_task(task);
2189
2190         return res;
2191 }
2192
2193 static int
2194 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2195                              struct domain_device *device,
2196                              int abort_flag, int tag, bool rst_to_recover)
2197 {
2198         struct hisi_sas_slot *slot;
2199         struct device *dev = hisi_hba->dev;
2200         struct hisi_sas_dq *dq;
2201         int i, rc;
2202
2203         switch (abort_flag) {
2204         case HISI_SAS_INT_ABT_CMD:
2205                 slot = &hisi_hba->slot_info[tag];
2206                 dq = &hisi_hba->dq[slot->dlvry_queue];
2207                 return _hisi_sas_internal_task_abort(hisi_hba, device,
2208                                                      abort_flag, tag, dq,
2209                                                      rst_to_recover);
2210         case HISI_SAS_INT_ABT_DEV:
2211                 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2212                         struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2213                         const struct cpumask *mask = cq->irq_mask;
2214
2215                         if (mask && !cpumask_intersects(cpu_online_mask, mask))
2216                                 continue;
2217                         dq = &hisi_hba->dq[i];
2218                         rc = _hisi_sas_internal_task_abort(hisi_hba, device,
2219                                                            abort_flag, tag,
2220                                                            dq, rst_to_recover);
2221                         if (rc)
2222                                 return rc;
2223                 }
2224                 break;
2225         default:
2226                 dev_err(dev, "Unrecognised internal abort flag (%d)\n",
2227                         abort_flag);
2228                 return -EINVAL;
2229         }
2230
2231         return 0;
2232 }
2233
2234 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2235 {
2236         hisi_sas_port_notify_formed(sas_phy);
2237 }
2238
2239 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2240                         u8 reg_index, u8 reg_count, u8 *write_data)
2241 {
2242         struct hisi_hba *hisi_hba = sha->lldd_ha;
2243
2244         if (!hisi_hba->hw->write_gpio)
2245                 return -EOPNOTSUPP;
2246
2247         return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2248                                 reg_index, reg_count, write_data);
2249 }
2250
2251 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2252 {
2253         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2254         struct sas_phy *sphy = sas_phy->phy;
2255         unsigned long flags;
2256
2257         phy->phy_attached = 0;
2258         phy->phy_type = 0;
2259         phy->port = NULL;
2260
2261         spin_lock_irqsave(&phy->lock, flags);
2262         if (phy->enable)
2263                 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2264         else
2265                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2266         spin_unlock_irqrestore(&phy->lock, flags);
2267 }
2268
2269 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2270                        gfp_t gfp_flags)
2271 {
2272         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2273         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2274         struct device *dev = hisi_hba->dev;
2275
2276         if (rdy) {
2277                 /* Phy down but ready */
2278                 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2279                 hisi_sas_port_notify_formed(sas_phy);
2280         } else {
2281                 struct hisi_sas_port *port  = phy->port;
2282
2283                 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||
2284                     phy->in_reset) {
2285                         dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2286                         return;
2287                 }
2288                 /* Phy down and not ready */
2289                 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2290                 sas_phy_disconnected(sas_phy);
2291
2292                 if (port) {
2293                         if (phy->phy_type & PORT_TYPE_SAS) {
2294                                 int port_id = port->id;
2295
2296                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2297                                                                        port_id))
2298                                         port->port_attached = 0;
2299                         } else if (phy->phy_type & PORT_TYPE_SATA)
2300                                 port->port_attached = 0;
2301                 }
2302                 hisi_sas_phy_disconnected(phy);
2303         }
2304 }
2305 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2306
2307 void hisi_sas_sync_irqs(struct hisi_hba *hisi_hba)
2308 {
2309         int i;
2310
2311         for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2312                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2313
2314                 synchronize_irq(cq->irq_no);
2315         }
2316 }
2317 EXPORT_SYMBOL_GPL(hisi_sas_sync_irqs);
2318
2319 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2320 {
2321         struct hisi_hba *hisi_hba = shost_priv(shost);
2322
2323         if (reset_type != SCSI_ADAPTER_RESET)
2324                 return -EOPNOTSUPP;
2325
2326         queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2327
2328         return 0;
2329 }
2330 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2331
2332 struct scsi_transport_template *hisi_sas_stt;
2333 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2334
2335 static struct sas_domain_function_template hisi_sas_transport_ops = {
2336         .lldd_dev_found         = hisi_sas_dev_found,
2337         .lldd_dev_gone          = hisi_sas_dev_gone,
2338         .lldd_execute_task      = hisi_sas_queue_command,
2339         .lldd_control_phy       = hisi_sas_control_phy,
2340         .lldd_abort_task        = hisi_sas_abort_task,
2341         .lldd_abort_task_set    = hisi_sas_abort_task_set,
2342         .lldd_clear_aca         = hisi_sas_clear_aca,
2343         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
2344         .lldd_lu_reset          = hisi_sas_lu_reset,
2345         .lldd_query_task        = hisi_sas_query_task,
2346         .lldd_clear_nexus_ha    = hisi_sas_clear_nexus_ha,
2347         .lldd_port_formed       = hisi_sas_port_formed,
2348         .lldd_write_gpio        = hisi_sas_write_gpio,
2349 };
2350
2351 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2352 {
2353         int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2354         struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2355
2356         for (i = 0; i < hisi_hba->queue_count; i++) {
2357                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2358                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2359                 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2360
2361                 s = sizeof(struct hisi_sas_cmd_hdr);
2362                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2363                         memset(&cmd_hdr[j], 0, s);
2364
2365                 dq->wr_point = 0;
2366
2367                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2368                 memset(hisi_hba->complete_hdr[i], 0, s);
2369                 cq->rd_point = 0;
2370         }
2371
2372         s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2373         memset(hisi_hba->initial_fis, 0, s);
2374
2375         s = max_command_entries * sizeof(struct hisi_sas_iost);
2376         memset(hisi_hba->iost, 0, s);
2377
2378         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2379         memset(hisi_hba->breakpoint, 0, s);
2380
2381         s = sizeof(struct hisi_sas_sata_breakpoint);
2382         for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2383                 memset(&sata_breakpoint[j], 0, s);
2384 }
2385 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2386
2387 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2388 {
2389         struct device *dev = hisi_hba->dev;
2390         int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2391         int max_command_entries_ru, sz_slot_buf_ru;
2392         int blk_cnt, slots_per_blk;
2393
2394         sema_init(&hisi_hba->sem, 1);
2395         spin_lock_init(&hisi_hba->lock);
2396         for (i = 0; i < hisi_hba->n_phy; i++) {
2397                 hisi_sas_phy_init(hisi_hba, i);
2398                 hisi_hba->port[i].port_attached = 0;
2399                 hisi_hba->port[i].id = -1;
2400         }
2401
2402         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2403                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2404                 hisi_hba->devices[i].device_id = i;
2405                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2406         }
2407
2408         for (i = 0; i < hisi_hba->queue_count; i++) {
2409                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2410                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2411
2412                 /* Completion queue structure */
2413                 cq->id = i;
2414                 cq->hisi_hba = hisi_hba;
2415
2416                 /* Delivery queue structure */
2417                 spin_lock_init(&dq->lock);
2418                 INIT_LIST_HEAD(&dq->list);
2419                 dq->id = i;
2420                 dq->hisi_hba = hisi_hba;
2421
2422                 /* Delivery queue */
2423                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2424                 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2425                                                 &hisi_hba->cmd_hdr_dma[i],
2426                                                 GFP_KERNEL);
2427                 if (!hisi_hba->cmd_hdr[i])
2428                         goto err_out;
2429
2430                 /* Completion queue */
2431                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2432                 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2433                                                 &hisi_hba->complete_hdr_dma[i],
2434                                                 GFP_KERNEL);
2435                 if (!hisi_hba->complete_hdr[i])
2436                         goto err_out;
2437         }
2438
2439         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2440         hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2441                                              GFP_KERNEL);
2442         if (!hisi_hba->itct)
2443                 goto err_out;
2444
2445         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2446                                            sizeof(struct hisi_sas_slot),
2447                                            GFP_KERNEL);
2448         if (!hisi_hba->slot_info)
2449                 goto err_out;
2450
2451         /* roundup to avoid overly large block size */
2452         max_command_entries_ru = roundup(max_command_entries, 64);
2453         if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2454                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2455         else
2456                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2457         sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2458         s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2459         blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2460         slots_per_blk = s / sz_slot_buf_ru;
2461
2462         for (i = 0; i < blk_cnt; i++) {
2463                 int slot_index = i * slots_per_blk;
2464                 dma_addr_t buf_dma;
2465                 void *buf;
2466
2467                 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2468                                           GFP_KERNEL);
2469                 if (!buf)
2470                         goto err_out;
2471
2472                 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2473                         struct hisi_sas_slot *slot;
2474
2475                         slot = &hisi_hba->slot_info[slot_index];
2476                         slot->buf = buf;
2477                         slot->buf_dma = buf_dma;
2478                         slot->idx = slot_index;
2479
2480                         buf += sz_slot_buf_ru;
2481                         buf_dma += sz_slot_buf_ru;
2482                 }
2483         }
2484
2485         s = max_command_entries * sizeof(struct hisi_sas_iost);
2486         hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2487                                              GFP_KERNEL);
2488         if (!hisi_hba->iost)
2489                 goto err_out;
2490
2491         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2492         hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2493                                                    &hisi_hba->breakpoint_dma,
2494                                                    GFP_KERNEL);
2495         if (!hisi_hba->breakpoint)
2496                 goto err_out;
2497
2498         s = hisi_hba->slot_index_count = max_command_entries;
2499         hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);
2500         if (!hisi_hba->slot_index_tags)
2501                 goto err_out;
2502
2503         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2504         hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2505                                                     &hisi_hba->initial_fis_dma,
2506                                                     GFP_KERNEL);
2507         if (!hisi_hba->initial_fis)
2508                 goto err_out;
2509
2510         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2511         hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2512                                         &hisi_hba->sata_breakpoint_dma,
2513                                         GFP_KERNEL);
2514         if (!hisi_hba->sata_breakpoint)
2515                 goto err_out;
2516
2517         hisi_hba->last_slot_index = HISI_SAS_UNRESERVED_IPTT;
2518
2519         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2520         if (!hisi_hba->wq) {
2521                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2522                 goto err_out;
2523         }
2524
2525         return 0;
2526 err_out:
2527         return -ENOMEM;
2528 }
2529 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2530
2531 void hisi_sas_free(struct hisi_hba *hisi_hba)
2532 {
2533         int i;
2534
2535         for (i = 0; i < hisi_hba->n_phy; i++) {
2536                 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2537
2538                 del_timer_sync(&phy->timer);
2539         }
2540
2541         if (hisi_hba->wq)
2542                 destroy_workqueue(hisi_hba->wq);
2543 }
2544 EXPORT_SYMBOL_GPL(hisi_sas_free);
2545
2546 void hisi_sas_rst_work_handler(struct work_struct *work)
2547 {
2548         struct hisi_hba *hisi_hba =
2549                 container_of(work, struct hisi_hba, rst_work);
2550
2551         if (hisi_sas_controller_prereset(hisi_hba))
2552                 return;
2553
2554         hisi_sas_controller_reset(hisi_hba);
2555 }
2556 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2557
2558 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2559 {
2560         struct hisi_sas_rst *rst =
2561                 container_of(work, struct hisi_sas_rst, work);
2562
2563         if (hisi_sas_controller_prereset(rst->hisi_hba))
2564                 goto rst_complete;
2565
2566         if (!hisi_sas_controller_reset(rst->hisi_hba))
2567                 rst->done = true;
2568 rst_complete:
2569         complete(rst->completion);
2570 }
2571 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2572
2573 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2574 {
2575         struct device *dev = hisi_hba->dev;
2576         struct platform_device *pdev = hisi_hba->platform_dev;
2577         struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2578         struct clk *refclk;
2579
2580         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2581                                           SAS_ADDR_SIZE)) {
2582                 dev_err(dev, "could not get property sas-addr\n");
2583                 return -ENOENT;
2584         }
2585
2586         if (np) {
2587                 /*
2588                  * These properties are only required for platform device-based
2589                  * controller with DT firmware.
2590                  */
2591                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2592                                         "hisilicon,sas-syscon");
2593                 if (IS_ERR(hisi_hba->ctrl)) {
2594                         dev_err(dev, "could not get syscon\n");
2595                         return -ENOENT;
2596                 }
2597
2598                 if (device_property_read_u32(dev, "ctrl-reset-reg",
2599                                              &hisi_hba->ctrl_reset_reg)) {
2600                         dev_err(dev, "could not get property ctrl-reset-reg\n");
2601                         return -ENOENT;
2602                 }
2603
2604                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2605                                              &hisi_hba->ctrl_reset_sts_reg)) {
2606                         dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2607                         return -ENOENT;
2608                 }
2609
2610                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2611                                              &hisi_hba->ctrl_clock_ena_reg)) {
2612                         dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2613                         return -ENOENT;
2614                 }
2615         }
2616
2617         refclk = devm_clk_get(dev, NULL);
2618         if (IS_ERR(refclk))
2619                 dev_dbg(dev, "no ref clk property\n");
2620         else
2621                 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2622
2623         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2624                 dev_err(dev, "could not get property phy-count\n");
2625                 return -ENOENT;
2626         }
2627
2628         if (device_property_read_u32(dev, "queue-count",
2629                                      &hisi_hba->queue_count)) {
2630                 dev_err(dev, "could not get property queue-count\n");
2631                 return -ENOENT;
2632         }
2633
2634         return 0;
2635 }
2636 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2637
2638 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2639                                               const struct hisi_sas_hw *hw)
2640 {
2641         struct resource *res;
2642         struct Scsi_Host *shost;
2643         struct hisi_hba *hisi_hba;
2644         struct device *dev = &pdev->dev;
2645         int error;
2646
2647         shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2648         if (!shost) {
2649                 dev_err(dev, "scsi host alloc failed\n");
2650                 return NULL;
2651         }
2652         hisi_hba = shost_priv(shost);
2653
2654         INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2655         hisi_hba->hw = hw;
2656         hisi_hba->dev = dev;
2657         hisi_hba->platform_dev = pdev;
2658         hisi_hba->shost = shost;
2659         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2660
2661         timer_setup(&hisi_hba->timer, NULL, 0);
2662
2663         if (hisi_sas_get_fw_info(hisi_hba) < 0)
2664                 goto err_out;
2665
2666         error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2667         if (error) {
2668                 dev_err(dev, "No usable DMA addressing method\n");
2669                 goto err_out;
2670         }
2671
2672         hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2673         if (IS_ERR(hisi_hba->regs))
2674                 goto err_out;
2675
2676         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2677         if (res) {
2678                 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2679                 if (IS_ERR(hisi_hba->sgpio_regs))
2680                         goto err_out;
2681         }
2682
2683         if (hisi_sas_alloc(hisi_hba)) {
2684                 hisi_sas_free(hisi_hba);
2685                 goto err_out;
2686         }
2687
2688         return shost;
2689 err_out:
2690         scsi_host_put(shost);
2691         dev_err(dev, "shost alloc failed\n");
2692         return NULL;
2693 }
2694
2695 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2696 {
2697         if (hisi_hba->hw->interrupt_preinit)
2698                 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2699         return 0;
2700 }
2701
2702 int hisi_sas_probe(struct platform_device *pdev,
2703                    const struct hisi_sas_hw *hw)
2704 {
2705         struct Scsi_Host *shost;
2706         struct hisi_hba *hisi_hba;
2707         struct device *dev = &pdev->dev;
2708         struct asd_sas_phy **arr_phy;
2709         struct asd_sas_port **arr_port;
2710         struct sas_ha_struct *sha;
2711         int rc, phy_nr, port_nr, i;
2712
2713         shost = hisi_sas_shost_alloc(pdev, hw);
2714         if (!shost)
2715                 return -ENOMEM;
2716
2717         sha = SHOST_TO_SAS_HA(shost);
2718         hisi_hba = shost_priv(shost);
2719         platform_set_drvdata(pdev, sha);
2720
2721         phy_nr = port_nr = hisi_hba->n_phy;
2722
2723         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2724         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2725         if (!arr_phy || !arr_port) {
2726                 rc = -ENOMEM;
2727                 goto err_out_ha;
2728         }
2729
2730         sha->sas_phy = arr_phy;
2731         sha->sas_port = arr_port;
2732         sha->lldd_ha = hisi_hba;
2733
2734         shost->transportt = hisi_sas_stt;
2735         shost->max_id = HISI_SAS_MAX_DEVICES;
2736         shost->max_lun = ~0;
2737         shost->max_channel = 1;
2738         shost->max_cmd_len = 16;
2739         if (hisi_hba->hw->slot_index_alloc) {
2740                 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2741                 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2742         } else {
2743                 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2744                 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2745         }
2746
2747         sha->sas_ha_name = DRV_NAME;
2748         sha->dev = hisi_hba->dev;
2749         sha->lldd_module = THIS_MODULE;
2750         sha->sas_addr = &hisi_hba->sas_addr[0];
2751         sha->num_phys = hisi_hba->n_phy;
2752         sha->core.shost = hisi_hba->shost;
2753
2754         for (i = 0; i < hisi_hba->n_phy; i++) {
2755                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2756                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2757         }
2758
2759         rc = hisi_sas_interrupt_preinit(hisi_hba);
2760         if (rc)
2761                 goto err_out_ha;
2762
2763         rc = scsi_add_host(shost, &pdev->dev);
2764         if (rc)
2765                 goto err_out_ha;
2766
2767         rc = sas_register_ha(sha);
2768         if (rc)
2769                 goto err_out_register_ha;
2770
2771         rc = hisi_hba->hw->hw_init(hisi_hba);
2772         if (rc)
2773                 goto err_out_hw_init;
2774
2775         scsi_scan_host(shost);
2776
2777         return 0;
2778
2779 err_out_hw_init:
2780         sas_unregister_ha(sha);
2781 err_out_register_ha:
2782         scsi_remove_host(shost);
2783 err_out_ha:
2784         hisi_sas_free(hisi_hba);
2785         scsi_host_put(shost);
2786         return rc;
2787 }
2788 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2789
2790 int hisi_sas_remove(struct platform_device *pdev)
2791 {
2792         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2793         struct hisi_hba *hisi_hba = sha->lldd_ha;
2794         struct Scsi_Host *shost = sha->core.shost;
2795
2796         del_timer_sync(&hisi_hba->timer);
2797
2798         sas_unregister_ha(sha);
2799         sas_remove_host(sha->core.shost);
2800
2801         hisi_sas_free(hisi_hba);
2802         scsi_host_put(shost);
2803         return 0;
2804 }
2805 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2806
2807 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2808 #define DEBUGFS_ENABLE_DEFAULT  "enabled"
2809 bool hisi_sas_debugfs_enable = true;
2810 u32 hisi_sas_debugfs_dump_count = 50;
2811 #else
2812 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2813 bool hisi_sas_debugfs_enable;
2814 u32 hisi_sas_debugfs_dump_count = 1;
2815 #endif
2816
2817 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2818 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2819 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2820                  "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2821
2822 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2823 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2824 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2825
2826 struct dentry *hisi_sas_debugfs_dir;
2827 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2828
2829 static __init int hisi_sas_init(void)
2830 {
2831         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2832         if (!hisi_sas_stt)
2833                 return -ENOMEM;
2834
2835         if (hisi_sas_debugfs_enable) {
2836                 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2837                 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2838                         pr_info("hisi_sas: Limiting debugfs dump count\n");
2839                         hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2840                 }
2841         }
2842
2843         return 0;
2844 }
2845
2846 static __exit void hisi_sas_exit(void)
2847 {
2848         sas_release_transport(hisi_sas_stt);
2849
2850         debugfs_remove(hisi_sas_debugfs_dir);
2851 }
2852
2853 module_init(hisi_sas_init);
2854 module_exit(hisi_sas_exit);
2855
2856 MODULE_LICENSE("GPL");
2857 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2858 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2859 MODULE_ALIAS("platform:" DRV_NAME);