drivers/scsi/hisi_sas/hisi_sas_main.c

   1 /*
   2  * Copyright (c) 2015 Linaro Ltd.
   3  * Copyright (c) 2015 Hisilicon Limited.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  */
  11
  12 #include "hisi_sas.h"
  13 #define DRV_NAME "hisi_sas"
  14
  15 #define DEV_IS_GONE(dev) \
  16         ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
  17
  18 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
  19                                 u8 *lun, struct hisi_sas_tmf_task *tmf);
  20 static int
  21 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
  22                              struct domain_device *device,
  23                              int abort_flag, int tag);
  24 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
  25 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
  26                                 void *funcdata);
  27 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
  28                                   struct domain_device *device);
  29 static void hisi_sas_dev_gone(struct domain_device *device);
  30
  31 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
  32 {
  33         switch (fis->command) {
  34         case ATA_CMD_FPDMA_WRITE:
  35         case ATA_CMD_FPDMA_READ:
  36         case ATA_CMD_FPDMA_RECV:
  37         case ATA_CMD_FPDMA_SEND:
  38         case ATA_CMD_NCQ_NON_DATA:
  39                 return HISI_SAS_SATA_PROTOCOL_FPDMA;
  40
  41         case ATA_CMD_DOWNLOAD_MICRO:
  42         case ATA_CMD_ID_ATA:
  43         case ATA_CMD_PMP_READ:
  44         case ATA_CMD_READ_LOG_EXT:
  45         case ATA_CMD_PIO_READ:
  46         case ATA_CMD_PIO_READ_EXT:
  47         case ATA_CMD_PMP_WRITE:
  48         case ATA_CMD_WRITE_LOG_EXT:
  49         case ATA_CMD_PIO_WRITE:
  50         case ATA_CMD_PIO_WRITE_EXT:
  51                 return HISI_SAS_SATA_PROTOCOL_PIO;
  52
  53         case ATA_CMD_DSM:
  54         case ATA_CMD_DOWNLOAD_MICRO_DMA:
  55         case ATA_CMD_PMP_READ_DMA:
  56         case ATA_CMD_PMP_WRITE_DMA:
  57         case ATA_CMD_READ:
  58         case ATA_CMD_READ_EXT:
  59         case ATA_CMD_READ_LOG_DMA_EXT:
  60         case ATA_CMD_READ_STREAM_DMA_EXT:
  61         case ATA_CMD_TRUSTED_RCV_DMA:
  62         case ATA_CMD_TRUSTED_SND_DMA:
  63         case ATA_CMD_WRITE:
  64         case ATA_CMD_WRITE_EXT:
  65         case ATA_CMD_WRITE_FUA_EXT:
  66         case ATA_CMD_WRITE_QUEUED:
  67         case ATA_CMD_WRITE_LOG_DMA_EXT:
  68         case ATA_CMD_WRITE_STREAM_DMA_EXT:
  69         case ATA_CMD_ZAC_MGMT_IN:
  70                 return HISI_SAS_SATA_PROTOCOL_DMA;
  71
  72         case ATA_CMD_CHK_POWER:
  73         case ATA_CMD_DEV_RESET:
  74         case ATA_CMD_EDD:
  75         case ATA_CMD_FLUSH:
  76         case ATA_CMD_FLUSH_EXT:
  77         case ATA_CMD_VERIFY:
  78         case ATA_CMD_VERIFY_EXT:
  79         case ATA_CMD_SET_FEATURES:
  80         case ATA_CMD_STANDBY:
  81         case ATA_CMD_STANDBYNOW1:
  82         case ATA_CMD_ZAC_MGMT_OUT:
  83                 return HISI_SAS_SATA_PROTOCOL_NONDATA;
  84
  85         case ATA_CMD_SET_MAX:
  86                 switch (fis->features) {
  87                 case ATA_SET_MAX_PASSWD:
  88                 case ATA_SET_MAX_LOCK:
  89                         return HISI_SAS_SATA_PROTOCOL_PIO;
  90
  91                 case ATA_SET_MAX_PASSWD_DMA:
  92                 case ATA_SET_MAX_UNLOCK_DMA:
  93                         return HISI_SAS_SATA_PROTOCOL_DMA;
  94
  95                 default:
  96                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  97                 }
  98
  99         default:
 100         {
 101                 if (direction == DMA_NONE)
 102                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
 103                 return HISI_SAS_SATA_PROTOCOL_PIO;
 104         }
 105         }
 106 }
 107 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
 108
 109 void hisi_sas_sata_done(struct sas_task *task,
 110                             struct hisi_sas_slot *slot)
 111 {
 112         struct task_status_struct *ts = &task->task_status;
 113         struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
 114         struct hisi_sas_status_buffer *status_buf =
 115                         hisi_sas_status_buf_addr_mem(slot);
 116         u8 *iu = &status_buf->iu[0];
 117         struct dev_to_host_fis *d2h =  (struct dev_to_host_fis *)iu;
 118
 119         resp->frame_len = sizeof(struct dev_to_host_fis);
 120         memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
 121
 122         ts->buf_valid_size = sizeof(*resp);
 123 }
 124 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
 125
 126 int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag)
 127 {
 128         struct ata_queued_cmd *qc = task->uldd_task;
 129
 130         if (qc) {
 131                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 132                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 133                         *tag = qc->tag;
 134                         return 1;
 135                 }
 136         }
 137         return 0;
 138 }
 139 EXPORT_SYMBOL_GPL(hisi_sas_get_ncq_tag);
 140
 141 /*
 142  * This function assumes linkrate mask fits in 8 bits, which it
 143  * does for all HW versions supported.
 144  */
 145 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
 146 {
 147         u8 rate = 0;
 148         int i;
 149
 150         max -= SAS_LINK_RATE_1_5_GBPS;
 151         for (i = 0; i <= max; i++)
 152                 rate |= 1 << (i * 2);
 153         return rate;
 154 }
 155 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
 156
 157 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
 158 {
 159         return device->port->ha->lldd_ha;
 160 }
 161
 162 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
 163 {
 164         return container_of(sas_port, struct hisi_sas_port, sas_port);
 165 }
 166 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
 167
 168 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
 169 {
 170         int phy_no;
 171
 172         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
 173                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 174 }
 175 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
 176
 177 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
 178 {
 179         void *bitmap = hisi_hba->slot_index_tags;
 180
 181         clear_bit(slot_idx, bitmap);
 182 }
 183
 184 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
 185 {
 186         unsigned long flags;
 187
 188         if (hisi_hba->hw->slot_index_alloc || (slot_idx >=
 189             hisi_hba->hw->max_command_entries - HISI_SAS_RESERVED_IPTT_CNT)) {
 190                 spin_lock_irqsave(&hisi_hba->lock, flags);
 191                 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
 192                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
 193         }
 194 }
 195
 196 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
 197 {
 198         void *bitmap = hisi_hba->slot_index_tags;
 199
 200         set_bit(slot_idx, bitmap);
 201 }
 202
 203 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
 204                                      struct scsi_cmnd *scsi_cmnd)
 205 {
 206         int index;
 207         void *bitmap = hisi_hba->slot_index_tags;
 208         unsigned long flags;
 209
 210         if (scsi_cmnd)
 211                 return scsi_cmnd->request->tag;
 212
 213         spin_lock_irqsave(&hisi_hba->lock, flags);
 214         index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
 215                                    hisi_hba->last_slot_index + 1);
 216         if (index >= hisi_hba->slot_index_count) {
 217                 index = find_next_zero_bit(bitmap,
 218                                 hisi_hba->slot_index_count,
 219                                 hisi_hba->hw->max_command_entries -
 220                                 HISI_SAS_RESERVED_IPTT_CNT);
 221                 if (index >= hisi_hba->slot_index_count) {
 222                         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 223                         return -SAS_QUEUE_FULL;
 224                 }
 225         }
 226         hisi_sas_slot_index_set(hisi_hba, index);
 227         hisi_hba->last_slot_index = index;
 228         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 229
 230         return index;
 231 }
 232
 233 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
 234 {
 235         int i;
 236
 237         for (i = 0; i < hisi_hba->slot_index_count; ++i)
 238                 hisi_sas_slot_index_clear(hisi_hba, i);
 239 }
 240
 241 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
 242                              struct hisi_sas_slot *slot)
 243 {
 244         unsigned long flags;
 245         int device_id = slot->device_id;
 246         struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
 247
 248         if (task) {
 249                 struct device *dev = hisi_hba->dev;
 250
 251                 if (!task->lldd_task)
 252                         return;
 253
 254                 task->lldd_task = NULL;
 255
 256                 if (!sas_protocol_ata(task->task_proto)) {
 257                         struct sas_ssp_task *ssp_task = &task->ssp_task;
 258                         struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 259
 260                         if (slot->n_elem)
 261                                 dma_unmap_sg(dev, task->scatter,
 262                                              task->num_scatter,
 263                                              task->data_dir);
 264                         if (slot->n_elem_dif)
 265                                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 266                                              scsi_prot_sg_count(scsi_cmnd),
 267                                              task->data_dir);
 268                 }
 269         }
 270
 271         spin_lock_irqsave(&sas_dev->lock, flags);
 272         list_del_init(&slot->entry);
 273         spin_unlock_irqrestore(&sas_dev->lock, flags);
 274
 275         memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
 276
 277         hisi_sas_slot_index_free(hisi_hba, slot->idx);
 278 }
 279 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
 280
 281 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 282                                   struct hisi_sas_slot *slot)
 283 {
 284         hisi_hba->hw->prep_smp(hisi_hba, slot);
 285 }
 286
 287 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 288                                   struct hisi_sas_slot *slot)
 289 {
 290         hisi_hba->hw->prep_ssp(hisi_hba, slot);
 291 }
 292
 293 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 294                                   struct hisi_sas_slot *slot)
 295 {
 296         hisi_hba->hw->prep_stp(hisi_hba, slot);
 297 }
 298
 299 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
 300                 struct hisi_sas_slot *slot,
 301                 int device_id, int abort_flag, int tag_to_abort)
 302 {
 303         hisi_hba->hw->prep_abort(hisi_hba, slot,
 304                         device_id, abort_flag, tag_to_abort);
 305 }
 306
 307 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
 308                                struct sas_task *task, int n_elem,
 309                                int n_elem_req, int n_elem_resp)
 310 {
 311         struct device *dev = hisi_hba->dev;
 312
 313         if (!sas_protocol_ata(task->task_proto)) {
 314                 if (task->num_scatter) {
 315                         if (n_elem)
 316                                 dma_unmap_sg(dev, task->scatter,
 317                                              task->num_scatter,
 318                                              task->data_dir);
 319                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 320                         if (n_elem_req)
 321                                 dma_unmap_sg(dev, &task->smp_task.smp_req,
 322                                              1, DMA_TO_DEVICE);
 323                         if (n_elem_resp)
 324                                 dma_unmap_sg(dev, &task->smp_task.smp_resp,
 325                                              1, DMA_FROM_DEVICE);
 326                 }
 327         }
 328 }
 329
 330 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
 331                             struct sas_task *task, int *n_elem,
 332                             int *n_elem_req, int *n_elem_resp)
 333 {
 334         struct device *dev = hisi_hba->dev;
 335         int rc;
 336
 337         if (sas_protocol_ata(task->task_proto)) {
 338                 *n_elem = task->num_scatter;
 339         } else {
 340                 unsigned int req_len, resp_len;
 341
 342                 if (task->num_scatter) {
 343                         *n_elem = dma_map_sg(dev, task->scatter,
 344                                              task->num_scatter, task->data_dir);
 345                         if (!*n_elem) {
 346                                 rc = -ENOMEM;
 347                                 goto prep_out;
 348                         }
 349                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 350                         *n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
 351                                                  1, DMA_TO_DEVICE);
 352                         if (!*n_elem_req) {
 353                                 rc = -ENOMEM;
 354                                 goto prep_out;
 355                         }
 356                         req_len = sg_dma_len(&task->smp_task.smp_req);
 357                         if (req_len & 0x3) {
 358                                 rc = -EINVAL;
 359                                 goto err_out_dma_unmap;
 360                         }
 361                         *n_elem_resp = dma_map_sg(dev, &task->smp_task.smp_resp,
 362                                                   1, DMA_FROM_DEVICE);
 363                         if (!*n_elem_resp) {
 364                                 rc = -ENOMEM;
 365                                 goto err_out_dma_unmap;
 366                         }
 367                         resp_len = sg_dma_len(&task->smp_task.smp_resp);
 368                         if (resp_len & 0x3) {
 369                                 rc = -EINVAL;
 370                                 goto err_out_dma_unmap;
 371                         }
 372                 }
 373         }
 374
 375         if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
 376                 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT",
 377                         *n_elem);
 378                 rc = -EINVAL;
 379                 goto err_out_dma_unmap;
 380         }
 381         return 0;
 382
 383 err_out_dma_unmap:
 384         /* It would be better to call dma_unmap_sg() here, but it's messy */
 385         hisi_sas_dma_unmap(hisi_hba, task, *n_elem,
 386                            *n_elem_req, *n_elem_resp);
 387 prep_out:
 388         return rc;
 389 }
 390
 391 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
 392                                    struct sas_task *task, int n_elem_dif)
 393 {
 394         struct device *dev = hisi_hba->dev;
 395
 396         if (n_elem_dif) {
 397                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 398                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 399
 400                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 401                              scsi_prot_sg_count(scsi_cmnd),
 402                              task->data_dir);
 403         }
 404 }
 405
 406 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
 407                                 int *n_elem_dif, struct sas_task *task)
 408 {
 409         struct device *dev = hisi_hba->dev;
 410         struct sas_ssp_task *ssp_task;
 411         struct scsi_cmnd *scsi_cmnd;
 412         int rc;
 413
 414         if (task->num_scatter) {
 415                 ssp_task = &task->ssp_task;
 416                 scsi_cmnd = ssp_task->cmd;
 417
 418                 if (scsi_prot_sg_count(scsi_cmnd)) {
 419                         *n_elem_dif = dma_map_sg(dev,
 420                                                  scsi_prot_sglist(scsi_cmnd),
 421                                                  scsi_prot_sg_count(scsi_cmnd),
 422                                                  task->data_dir);
 423
 424                         if (!*n_elem_dif)
 425                                 return -ENOMEM;
 426
 427                         if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
 428                                 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
 429                                         *n_elem_dif);
 430                                 rc = -EINVAL;
 431                                 goto err_out_dif_dma_unmap;
 432                         }
 433                 }
 434         }
 435
 436         return 0;
 437
 438 err_out_dif_dma_unmap:
 439         dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 440                      scsi_prot_sg_count(scsi_cmnd), task->data_dir);
 441         return rc;
 442 }
 443
 444 static int hisi_sas_task_prep(struct sas_task *task,
 445                               struct hisi_sas_dq **dq_pointer,
 446                               bool is_tmf, struct hisi_sas_tmf_task *tmf,
 447                               int *pass)
 448 {
 449         struct domain_device *device = task->dev;
 450         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 451         struct hisi_sas_device *sas_dev = device->lldd_dev;
 452         struct hisi_sas_port *port;
 453         struct hisi_sas_slot *slot;
 454         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 455         struct asd_sas_port *sas_port = device->port;
 456         struct device *dev = hisi_hba->dev;
 457         int dlvry_queue_slot, dlvry_queue, rc, slot_idx;
 458         int n_elem = 0, n_elem_dif = 0, n_elem_req = 0, n_elem_resp = 0;
 459         struct hisi_sas_dq *dq;
 460         unsigned long flags;
 461         int wr_q_index;
 462
 463         if (DEV_IS_GONE(sas_dev)) {
 464                 if (sas_dev)
 465                         dev_info(dev, "task prep: device %d not ready\n",
 466                                  sas_dev->device_id);
 467                 else
 468                         dev_info(dev, "task prep: device %016llx not ready\n",
 469                                  SAS_ADDR(device->sas_addr));
 470
 471                 return -ECOMM;
 472         }
 473
 474         if (hisi_hba->reply_map) {
 475                 int cpu = raw_smp_processor_id();
 476                 unsigned int dq_index = hisi_hba->reply_map[cpu];
 477
 478                 *dq_pointer = dq = &hisi_hba->dq[dq_index];
 479         } else {
 480                 *dq_pointer = dq = sas_dev->dq;
 481         }
 482
 483         port = to_hisi_sas_port(sas_port);
 484         if (port && !port->port_attached) {
 485                 dev_info(dev, "task prep: %s port%d not attach device\n",
 486                          (dev_is_sata(device)) ?
 487                          "SATA/STP" : "SAS",
 488                          device->port->id);
 489
 490                 return -ECOMM;
 491         }
 492
 493         rc = hisi_sas_dma_map(hisi_hba, task, &n_elem,
 494                               &n_elem_req, &n_elem_resp);
 495         if (rc < 0)
 496                 goto prep_out;
 497
 498         if (!sas_protocol_ata(task->task_proto)) {
 499                 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
 500                 if (rc < 0)
 501                         goto err_out_dma_unmap;
 502         }
 503
 504         if (hisi_hba->hw->slot_index_alloc)
 505                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
 506         else {
 507                 struct scsi_cmnd *scsi_cmnd = NULL;
 508
 509                 if (task->uldd_task) {
 510                         struct ata_queued_cmd *qc;
 511
 512                         if (dev_is_sata(device)) {
 513                                 qc = task->uldd_task;
 514                                 scsi_cmnd = qc->scsicmd;
 515                         } else {
 516                                 scsi_cmnd = task->uldd_task;
 517                         }
 518                 }
 519                 rc  = hisi_sas_slot_index_alloc(hisi_hba, scsi_cmnd);
 520         }
 521         if (rc < 0)
 522                 goto err_out_dif_dma_unmap;
 523
 524         slot_idx = rc;
 525         slot = &hisi_hba->slot_info[slot_idx];
 526
 527         spin_lock_irqsave(&dq->lock, flags);
 528         wr_q_index = hisi_hba->hw->get_free_slot(hisi_hba, dq);
 529         if (wr_q_index < 0) {
 530                 spin_unlock_irqrestore(&dq->lock, flags);
 531                 rc = -EAGAIN;
 532                 goto err_out_tag;
 533         }
 534
 535         list_add_tail(&slot->delivery, &dq->list);
 536         spin_unlock_irqrestore(&dq->lock, flags);
 537         spin_lock_irqsave(&sas_dev->lock, flags);
 538         list_add_tail(&slot->entry, &sas_dev->list);
 539         spin_unlock_irqrestore(&sas_dev->lock, flags);
 540
 541         dlvry_queue = dq->id;
 542         dlvry_queue_slot = wr_q_index;
 543
 544         slot->device_id = sas_dev->device_id;
 545         slot->n_elem = n_elem;
 546         slot->n_elem_dif = n_elem_dif;
 547         slot->dlvry_queue = dlvry_queue;
 548         slot->dlvry_queue_slot = dlvry_queue_slot;
 549         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 550         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 551         slot->task = task;
 552         slot->port = port;
 553         slot->tmf = tmf;
 554         slot->is_internal = is_tmf;
 555         task->lldd_task = slot;
 556
 557         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 558         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
 559         memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
 560
 561         switch (task->task_proto) {
 562         case SAS_PROTOCOL_SMP:
 563                 hisi_sas_task_prep_smp(hisi_hba, slot);
 564                 break;
 565         case SAS_PROTOCOL_SSP:
 566                 hisi_sas_task_prep_ssp(hisi_hba, slot);
 567                 break;
 568         case SAS_PROTOCOL_SATA:
 569         case SAS_PROTOCOL_STP:
 570         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 571                 hisi_sas_task_prep_ata(hisi_hba, slot);
 572                 break;
 573         default:
 574                 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
 575                         task->task_proto);
 576                 break;
 577         }
 578
 579         spin_lock_irqsave(&task->task_state_lock, flags);
 580         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 581         spin_unlock_irqrestore(&task->task_state_lock, flags);
 582
 583         ++(*pass);
 584         WRITE_ONCE(slot->ready, 1);
 585
 586         return 0;
 587
 588 err_out_tag:
 589         hisi_sas_slot_index_free(hisi_hba, slot_idx);
 590 err_out_dif_dma_unmap:
 591         if (!sas_protocol_ata(task->task_proto))
 592                 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
 593 err_out_dma_unmap:
 594         hisi_sas_dma_unmap(hisi_hba, task, n_elem,
 595                            n_elem_req, n_elem_resp);
 596 prep_out:
 597         dev_err(dev, "task prep: failed[%d]!\n", rc);
 598         return rc;
 599 }
 600
 601 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
 602                               bool is_tmf, struct hisi_sas_tmf_task *tmf)
 603 {
 604         u32 rc;
 605         u32 pass = 0;
 606         unsigned long flags;
 607         struct hisi_hba *hisi_hba;
 608         struct device *dev;
 609         struct domain_device *device = task->dev;
 610         struct asd_sas_port *sas_port = device->port;
 611         struct hisi_sas_dq *dq = NULL;
 612
 613         if (!sas_port) {
 614                 struct task_status_struct *ts = &task->task_status;
 615
 616                 ts->resp = SAS_TASK_UNDELIVERED;
 617                 ts->stat = SAS_PHY_DOWN;
 618                 /*
 619                  * libsas will use dev->port, should
 620                  * not call task_done for sata
 621                  */
 622                 if (device->dev_type != SAS_SATA_DEV)
 623                         task->task_done(task);
 624                 return -ECOMM;
 625         }
 626
 627         hisi_hba = dev_to_hisi_hba(device);
 628         dev = hisi_hba->dev;
 629
 630         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
 631                 if (in_softirq())
 632                         return -EINVAL;
 633
 634                 down(&hisi_hba->sem);
 635                 up(&hisi_hba->sem);
 636         }
 637
 638         /* protect task_prep and start_delivery sequence */
 639         rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf, &pass);
 640         if (rc)
 641                 dev_err(dev, "task exec: failed[%d]!\n", rc);
 642
 643         if (likely(pass)) {
 644                 spin_lock_irqsave(&dq->lock, flags);
 645                 hisi_hba->hw->start_delivery(dq);
 646                 spin_unlock_irqrestore(&dq->lock, flags);
 647         }
 648
 649         return rc;
 650 }
 651
 652 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
 653 {
 654         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 655         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 656         struct sas_ha_struct *sas_ha;
 657
 658         if (!phy->phy_attached)
 659                 return;
 660
 661         sas_ha = &hisi_hba->sha;
 662         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
 663
 664         if (sas_phy->phy) {
 665                 struct sas_phy *sphy = sas_phy->phy;
 666
 667                 sphy->negotiated_linkrate = sas_phy->linkrate;
 668                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 669                 sphy->maximum_linkrate_hw =
 670                         hisi_hba->hw->phy_get_max_linkrate();
 671                 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
 672                         sphy->minimum_linkrate = phy->minimum_linkrate;
 673
 674                 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
 675                         sphy->maximum_linkrate = phy->maximum_linkrate;
 676         }
 677
 678         if (phy->phy_type & PORT_TYPE_SAS) {
 679                 struct sas_identify_frame *id;
 680
 681                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 682                 id->dev_type = phy->identify.device_type;
 683                 id->initiator_bits = SAS_PROTOCOL_ALL;
 684                 id->target_bits = phy->identify.target_port_protocols;
 685         } else if (phy->phy_type & PORT_TYPE_SATA) {
 686                 /*Nothing*/
 687         }
 688
 689         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 690         sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
 691 }
 692
 693 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 694 {
 695         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 696         struct hisi_sas_device *sas_dev = NULL;
 697         unsigned long flags;
 698         int last = hisi_hba->last_dev_id;
 699         int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
 700         int i;
 701
 702         spin_lock_irqsave(&hisi_hba->lock, flags);
 703         for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
 704                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 705                         int queue = i % hisi_hba->queue_count;
 706                         struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
 707
 708                         hisi_hba->devices[i].device_id = i;
 709                         sas_dev = &hisi_hba->devices[i];
 710                         sas_dev->dev_type = device->dev_type;
 711                         sas_dev->hisi_hba = hisi_hba;
 712                         sas_dev->sas_device = device;
 713                         sas_dev->dq = dq;
 714                         spin_lock_init(&sas_dev->lock);
 715                         INIT_LIST_HEAD(&hisi_hba->devices[i].list);
 716                         break;
 717                 }
 718                 i++;
 719         }
 720         hisi_hba->last_dev_id = i;
 721         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 722
 723         return sas_dev;
 724 }
 725
 726 #define HISI_SAS_SRST_ATA_DISK_CNT 3
 727 static int hisi_sas_init_device(struct domain_device *device)
 728 {
 729         int rc = TMF_RESP_FUNC_COMPLETE;
 730         struct scsi_lun lun;
 731         struct hisi_sas_tmf_task tmf_task;
 732         int retry = HISI_SAS_SRST_ATA_DISK_CNT;
 733         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 734
 735         switch (device->dev_type) {
 736         case SAS_END_DEVICE:
 737                 int_to_scsilun(0, &lun);
 738
 739                 tmf_task.tmf = TMF_CLEAR_TASK_SET;
 740                 rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
 741                                                   &tmf_task);
 742                 if (rc == TMF_RESP_FUNC_COMPLETE)
 743                         hisi_sas_release_task(hisi_hba, device);
 744                 break;
 745         case SAS_SATA_DEV:
 746         case SAS_SATA_PM:
 747         case SAS_SATA_PM_PORT:
 748         case SAS_SATA_PENDING:
 749                 while (retry-- > 0) {
 750                         rc = hisi_sas_softreset_ata_disk(device);
 751                         if (!rc)
 752                                 break;
 753                 }
 754                 break;
 755         default:
 756                 break;
 757         }
 758
 759         return rc;
 760 }
 761
 762 static int hisi_sas_dev_found(struct domain_device *device)
 763 {
 764         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 765         struct domain_device *parent_dev = device->parent;
 766         struct hisi_sas_device *sas_dev;
 767         struct device *dev = hisi_hba->dev;
 768         int rc;
 769
 770         if (hisi_hba->hw->alloc_dev)
 771                 sas_dev = hisi_hba->hw->alloc_dev(device);
 772         else
 773                 sas_dev = hisi_sas_alloc_dev(device);
 774         if (!sas_dev) {
 775                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 776                         HISI_SAS_MAX_DEVICES);
 777                 return -EINVAL;
 778         }
 779
 780         device->lldd_dev = sas_dev;
 781         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 782
 783         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 784                 int phy_no;
 785                 u8 phy_num = parent_dev->ex_dev.num_phys;
 786                 struct ex_phy *phy;
 787
 788                 for (phy_no = 0; phy_no < phy_num; phy_no++) {
 789                         phy = &parent_dev->ex_dev.ex_phy[phy_no];
 790                         if (SAS_ADDR(phy->attached_sas_addr) ==
 791                                 SAS_ADDR(device->sas_addr))
 792                                 break;
 793                 }
 794
 795                 if (phy_no == phy_num) {
 796                         dev_info(dev, "dev found: no attached "
 797                                  "dev:%016llx at ex:%016llx\n",
 798                                  SAS_ADDR(device->sas_addr),
 799                                  SAS_ADDR(parent_dev->sas_addr));
 800                         rc = -EINVAL;
 801                         goto err_out;
 802                 }
 803         }
 804
 805         dev_info(dev, "dev[%d:%x] found\n",
 806                 sas_dev->device_id, sas_dev->dev_type);
 807
 808         rc = hisi_sas_init_device(device);
 809         if (rc)
 810                 goto err_out;
 811         return 0;
 812
 813 err_out:
 814         hisi_sas_dev_gone(device);
 815         return rc;
 816 }
 817
 818 int hisi_sas_slave_configure(struct scsi_device *sdev)
 819 {
 820         struct domain_device *dev = sdev_to_domain_dev(sdev);
 821         int ret = sas_slave_configure(sdev);
 822
 823         if (ret)
 824                 return ret;
 825         if (!dev_is_sata(dev))
 826                 sas_change_queue_depth(sdev, 64);
 827
 828         return 0;
 829 }
 830 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
 831
 832 void hisi_sas_scan_start(struct Scsi_Host *shost)
 833 {
 834         struct hisi_hba *hisi_hba = shost_priv(shost);
 835
 836         hisi_hba->hw->phys_init(hisi_hba);
 837 }
 838 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
 839
 840 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 841 {
 842         struct hisi_hba *hisi_hba = shost_priv(shost);
 843         struct sas_ha_struct *sha = &hisi_hba->sha;
 844
 845         /* Wait for PHY up interrupt to occur */
 846         if (time < HZ)
 847                 return 0;
 848
 849         sas_drain_work(sha);
 850         return 1;
 851 }
 852 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
 853
 854 static void hisi_sas_phyup_work(struct work_struct *work)
 855 {
 856         struct hisi_sas_phy *phy =
 857                 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
 858         struct hisi_hba *hisi_hba = phy->hisi_hba;
 859         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 860         int phy_no = sas_phy->id;
 861
 862         if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
 863                 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
 864         hisi_sas_bytes_dmaed(hisi_hba, phy_no);
 865 }
 866
 867 static void hisi_sas_linkreset_work(struct work_struct *work)
 868 {
 869         struct hisi_sas_phy *phy =
 870                 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
 871         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 872
 873         hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
 874 }
 875
 876 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
 877         [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
 878         [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
 879 };
 880
 881 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
 882                                 enum hisi_sas_phy_event event)
 883 {
 884         struct hisi_hba *hisi_hba = phy->hisi_hba;
 885
 886         if (WARN_ON(event >= HISI_PHYES_NUM))
 887                 return false;
 888
 889         return queue_work(hisi_hba->wq, &phy->works[event]);
 890 }
 891 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
 892
 893 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
 894 {
 895         struct hisi_sas_phy *phy = from_timer(phy, t, timer);
 896         struct hisi_hba *hisi_hba = phy->hisi_hba;
 897         struct device *dev = hisi_hba->dev;
 898         int phy_no = phy->sas_phy.id;
 899
 900         dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
 901         hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
 902 }
 903
 904 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
 905 {
 906         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 907         struct device *dev = hisi_hba->dev;
 908
 909         if (!timer_pending(&phy->timer)) {
 910                 dev_dbg(dev, "phy%d OOB ready\n", phy_no);
 911                 phy->timer.expires = jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT * HZ;
 912                 add_timer(&phy->timer);
 913         }
 914 }
 915 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
 916
 917 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
 918 {
 919         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 920         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 921         int i;
 922
 923         phy->hisi_hba = hisi_hba;
 924         phy->port = NULL;
 925         phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
 926         phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
 927         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 928         sas_phy->class = SAS;
 929         sas_phy->iproto = SAS_PROTOCOL_ALL;
 930         sas_phy->tproto = 0;
 931         sas_phy->type = PHY_TYPE_PHYSICAL;
 932         sas_phy->role = PHY_ROLE_INITIATOR;
 933         sas_phy->oob_mode = OOB_NOT_CONNECTED;
 934         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 935         sas_phy->id = phy_no;
 936         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
 937         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
 938         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
 939         sas_phy->lldd_phy = phy;
 940
 941         for (i = 0; i < HISI_PHYES_NUM; i++)
 942                 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
 943
 944         spin_lock_init(&phy->lock);
 945
 946         timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
 947 }
 948
 949 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
 950 {
 951         struct sas_ha_struct *sas_ha = sas_phy->ha;
 952         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 953         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 954         struct asd_sas_port *sas_port = sas_phy->port;
 955         struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
 956         unsigned long flags;
 957
 958         if (!sas_port)
 959                 return;
 960
 961         spin_lock_irqsave(&hisi_hba->lock, flags);
 962         port->port_attached = 1;
 963         port->id = phy->port_id;
 964         phy->port = port;
 965         sas_port->lldd_port = port;
 966         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 967 }
 968
 969 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
 970                                      struct hisi_sas_slot *slot)
 971 {
 972         if (task) {
 973                 unsigned long flags;
 974                 struct task_status_struct *ts;
 975
 976                 ts = &task->task_status;
 977
 978                 ts->resp = SAS_TASK_COMPLETE;
 979                 ts->stat = SAS_ABORTED_TASK;
 980                 spin_lock_irqsave(&task->task_state_lock, flags);
 981                 task->task_state_flags &=
 982                         ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
 983                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 984                 spin_unlock_irqrestore(&task->task_state_lock, flags);
 985         }
 986
 987         hisi_sas_slot_task_free(hisi_hba, task, slot);
 988 }
 989
 990 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
 991                         struct domain_device *device)
 992 {
 993         struct hisi_sas_slot *slot, *slot2;
 994         struct hisi_sas_device *sas_dev = device->lldd_dev;
 995
 996         list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
 997                 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
 998 }
 999
1000 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1001 {
1002         struct hisi_sas_device *sas_dev;
1003         struct domain_device *device;
1004         int i;
1005
1006         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1007                 sas_dev = &hisi_hba->devices[i];
1008                 device = sas_dev->sas_device;
1009
1010                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1011                     !device)
1012                         continue;
1013
1014                 hisi_sas_release_task(hisi_hba, device);
1015         }
1016 }
1017 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1018
1019 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1020                                 struct domain_device *device)
1021 {
1022         if (hisi_hba->hw->dereg_device)
1023                 hisi_hba->hw->dereg_device(hisi_hba, device);
1024 }
1025
1026 static void hisi_sas_dev_gone(struct domain_device *device)
1027 {
1028         struct hisi_sas_device *sas_dev = device->lldd_dev;
1029         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1030         struct device *dev = hisi_hba->dev;
1031
1032         dev_info(dev, "dev[%d:%x] is gone\n",
1033                  sas_dev->device_id, sas_dev->dev_type);
1034
1035         if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
1036                 hisi_sas_internal_task_abort(hisi_hba, device,
1037                                              HISI_SAS_INT_ABT_DEV, 0);
1038
1039                 hisi_sas_dereg_device(hisi_hba, device);
1040
1041                 down(&hisi_hba->sem);
1042                 hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1043                 up(&hisi_hba->sem);
1044                 device->lldd_dev = NULL;
1045         }
1046
1047         if (hisi_hba->hw->free_device)
1048                 hisi_hba->hw->free_device(sas_dev);
1049         sas_dev->dev_type = SAS_PHY_UNUSED;
1050 }
1051
1052 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
1053 {
1054         return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
1055 }
1056
1057 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1058                         struct sas_phy_linkrates *r)
1059 {
1060         struct sas_phy_linkrates _r;
1061
1062         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1063         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1064         enum sas_linkrate min, max;
1065
1066         if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1067                 return -EINVAL;
1068
1069         if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1070                 max = sas_phy->phy->maximum_linkrate;
1071                 min = r->minimum_linkrate;
1072         } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1073                 max = r->maximum_linkrate;
1074                 min = sas_phy->phy->minimum_linkrate;
1075         } else
1076                 return -EINVAL;
1077
1078         _r.maximum_linkrate = max;
1079         _r.minimum_linkrate = min;
1080
1081         sas_phy->phy->maximum_linkrate = max;
1082         sas_phy->phy->minimum_linkrate = min;
1083
1084         hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1085         msleep(100);
1086         hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1087         hisi_hba->hw->phy_start(hisi_hba, phy_no);
1088
1089         return 0;
1090 }
1091
1092 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1093                                 void *funcdata)
1094 {
1095         struct sas_ha_struct *sas_ha = sas_phy->ha;
1096         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1097         int phy_no = sas_phy->id;
1098
1099         switch (func) {
1100         case PHY_FUNC_HARD_RESET:
1101                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1102                 break;
1103
1104         case PHY_FUNC_LINK_RESET:
1105                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1106                 msleep(100);
1107                 hisi_hba->hw->phy_start(hisi_hba, phy_no);
1108                 break;
1109
1110         case PHY_FUNC_DISABLE:
1111                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1112                 break;
1113
1114         case PHY_FUNC_SET_LINK_RATE:
1115                 return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1116         case PHY_FUNC_GET_EVENTS:
1117                 if (hisi_hba->hw->get_events) {
1118                         hisi_hba->hw->get_events(hisi_hba, phy_no);
1119                         break;
1120                 }
1121                 /* fallthru */
1122         case PHY_FUNC_RELEASE_SPINUP_HOLD:
1123         default:
1124                 return -EOPNOTSUPP;
1125         }
1126         return 0;
1127 }
1128
1129 static void hisi_sas_task_done(struct sas_task *task)
1130 {
1131         del_timer(&task->slow_task->timer);
1132         complete(&task->slow_task->completion);
1133 }
1134
1135 static void hisi_sas_tmf_timedout(struct timer_list *t)
1136 {
1137         struct sas_task_slow *slow = from_timer(slow, t, timer);
1138         struct sas_task *task = slow->task;
1139         unsigned long flags;
1140         bool is_completed = true;
1141
1142         spin_lock_irqsave(&task->task_state_lock, flags);
1143         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1144                 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1145                 is_completed = false;
1146         }
1147         spin_unlock_irqrestore(&task->task_state_lock, flags);
1148
1149         if (!is_completed)
1150                 complete(&task->slow_task->completion);
1151 }
1152
1153 #define TASK_TIMEOUT 20
1154 #define TASK_RETRY 3
1155 #define INTERNAL_ABORT_TIMEOUT 6
1156 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
1157                                            void *parameter, u32 para_len,
1158                                            struct hisi_sas_tmf_task *tmf)
1159 {
1160         struct hisi_sas_device *sas_dev = device->lldd_dev;
1161         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1162         struct device *dev = hisi_hba->dev;
1163         struct sas_task *task;
1164         int res, retry;
1165
1166         for (retry = 0; retry < TASK_RETRY; retry++) {
1167                 task = sas_alloc_slow_task(GFP_KERNEL);
1168                 if (!task)
1169                         return -ENOMEM;
1170
1171                 task->dev = device;
1172                 task->task_proto = device->tproto;
1173
1174                 if (dev_is_sata(device)) {
1175                         task->ata_task.device_control_reg_update = 1;
1176                         memcpy(&task->ata_task.fis, parameter, para_len);
1177                 } else {
1178                         memcpy(&task->ssp_task, parameter, para_len);
1179                 }
1180                 task->task_done = hisi_sas_task_done;
1181
1182                 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1183                 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT * HZ;
1184                 add_timer(&task->slow_task->timer);
1185
1186                 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
1187
1188                 if (res) {
1189                         del_timer(&task->slow_task->timer);
1190                         dev_err(dev, "abort tmf: executing internal task failed: %d\n",
1191                                 res);
1192                         goto ex_err;
1193                 }
1194
1195                 wait_for_completion(&task->slow_task->completion);
1196                 res = TMF_RESP_FUNC_FAILED;
1197                 /* Even TMF timed out, return direct. */
1198                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1199                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1200                                 struct hisi_sas_slot *slot = task->lldd_task;
1201
1202                                 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1203                                 if (slot) {
1204                                         struct hisi_sas_cq *cq =
1205                                                &hisi_hba->cq[slot->dlvry_queue];
1206                                         /*
1207                                          * flush tasklet to avoid free'ing task
1208                                          * before using task in IO completion
1209                                          */
1210                                         tasklet_kill(&cq->tasklet);
1211                                         slot->task = NULL;
1212                                 }
1213
1214                                 goto ex_err;
1215                         } else
1216                                 dev_err(dev, "abort tmf: TMF task timeout\n");
1217                 }
1218
1219                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1220                      task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1221                         res = TMF_RESP_FUNC_COMPLETE;
1222                         break;
1223                 }
1224
1225                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1226                         task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1227                         res = TMF_RESP_FUNC_SUCC;
1228                         break;
1229                 }
1230
1231                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1232                       task->task_status.stat == SAS_DATA_UNDERRUN) {
1233                         /* no error, but return the number of bytes of
1234                          * underrun
1235                          */
1236                         dev_warn(dev, "abort tmf: task to dev %016llx "
1237                                  "resp: 0x%x sts 0x%x underrun\n",
1238                                  SAS_ADDR(device->sas_addr),
1239                                  task->task_status.resp,
1240                                  task->task_status.stat);
1241                         res = task->task_status.residual;
1242                         break;
1243                 }
1244
1245                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1246                         task->task_status.stat == SAS_DATA_OVERRUN) {
1247                         dev_warn(dev, "abort tmf: blocked task error\n");
1248                         res = -EMSGSIZE;
1249                         break;
1250                 }
1251
1252                 dev_warn(dev, "abort tmf: task to dev "
1253                          "%016llx resp: 0x%x status 0x%x\n",
1254                          SAS_ADDR(device->sas_addr), task->task_status.resp,
1255                          task->task_status.stat);
1256                 sas_free_task(task);
1257                 task = NULL;
1258         }
1259 ex_err:
1260         if (retry == TASK_RETRY)
1261                 dev_warn(dev, "abort tmf: executing internal task failed!\n");
1262         sas_free_task(task);
1263         return res;
1264 }
1265
1266 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1267                 bool reset, int pmp, u8 *fis)
1268 {
1269         struct ata_taskfile tf;
1270
1271         ata_tf_init(dev, &tf);
1272         if (reset)
1273                 tf.ctl |= ATA_SRST;
1274         else
1275                 tf.ctl &= ~ATA_SRST;
1276         tf.command = ATA_CMD_DEV_RESET;
1277         ata_tf_to_fis(&tf, pmp, 0, fis);
1278 }
1279
1280 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1281 {
1282         u8 fis[20] = {0};
1283         struct ata_port *ap = device->sata_dev.ap;
1284         struct ata_link *link;
1285         int rc = TMF_RESP_FUNC_FAILED;
1286         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1287         struct device *dev = hisi_hba->dev;
1288         int s = sizeof(struct host_to_dev_fis);
1289
1290         ata_for_each_link(link, ap, EDGE) {
1291                 int pmp = sata_srst_pmp(link);
1292
1293                 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1294                 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1295                 if (rc != TMF_RESP_FUNC_COMPLETE)
1296                         break;
1297         }
1298
1299         if (rc == TMF_RESP_FUNC_COMPLETE) {
1300                 ata_for_each_link(link, ap, EDGE) {
1301                         int pmp = sata_srst_pmp(link);
1302
1303                         hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1304                         rc = hisi_sas_exec_internal_tmf_task(device, fis,
1305                                                              s, NULL);
1306                         if (rc != TMF_RESP_FUNC_COMPLETE)
1307                                 dev_err(dev, "ata disk de-reset failed\n");
1308                 }
1309         } else {
1310                 dev_err(dev, "ata disk reset failed\n");
1311         }
1312
1313         if (rc == TMF_RESP_FUNC_COMPLETE)
1314                 hisi_sas_release_task(hisi_hba, device);
1315
1316         return rc;
1317 }
1318
1319 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1320                                 u8 *lun, struct hisi_sas_tmf_task *tmf)
1321 {
1322         struct sas_ssp_task ssp_task;
1323
1324         if (!(device->tproto & SAS_PROTOCOL_SSP))
1325                 return TMF_RESP_FUNC_ESUPP;
1326
1327         memcpy(ssp_task.LUN, lun, 8);
1328
1329         return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1330                                 sizeof(ssp_task), tmf);
1331 }
1332
1333 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1334 {
1335         u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1336         int i;
1337
1338         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1339                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1340                 struct domain_device *device = sas_dev->sas_device;
1341                 struct asd_sas_port *sas_port;
1342                 struct hisi_sas_port *port;
1343                 struct hisi_sas_phy *phy = NULL;
1344                 struct asd_sas_phy *sas_phy;
1345
1346                 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1347                                 || !device || !device->port)
1348                         continue;
1349
1350                 sas_port = device->port;
1351                 port = to_hisi_sas_port(sas_port);
1352
1353                 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1354                         if (state & BIT(sas_phy->id)) {
1355                                 phy = sas_phy->lldd_phy;
1356                                 break;
1357                         }
1358
1359                 if (phy) {
1360                         port->id = phy->port_id;
1361
1362                         /* Update linkrate of directly attached device. */
1363                         if (!device->parent)
1364                                 device->linkrate = phy->sas_phy.linkrate;
1365
1366                         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1367                 } else
1368                         port->id = 0xff;
1369         }
1370 }
1371
1372 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1373                               u32 state)
1374 {
1375         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1376         struct asd_sas_port *_sas_port = NULL;
1377         int phy_no;
1378
1379         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1380                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1381                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1382                 struct asd_sas_port *sas_port = sas_phy->port;
1383                 bool do_port_check = !!(_sas_port != sas_port);
1384
1385                 if (!sas_phy->phy->enabled)
1386                         continue;
1387
1388                 /* Report PHY state change to libsas */
1389                 if (state & BIT(phy_no)) {
1390                         if (do_port_check && sas_port && sas_port->port_dev) {
1391                                 struct domain_device *dev = sas_port->port_dev;
1392
1393                                 _sas_port = sas_port;
1394
1395                                 if (DEV_IS_EXPANDER(dev->dev_type))
1396                                         sas_ha->notify_port_event(sas_phy,
1397                                                         PORTE_BROADCAST_RCVD);
1398                         }
1399                 } else if (old_state & (1 << phy_no))
1400                         /* PHY down but was up before */
1401                         hisi_sas_phy_down(hisi_hba, phy_no, 0);
1402
1403         }
1404 }
1405
1406 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1407 {
1408         struct hisi_sas_device *sas_dev;
1409         struct domain_device *device;
1410         int i;
1411
1412         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1413                 sas_dev = &hisi_hba->devices[i];
1414                 device = sas_dev->sas_device;
1415
1416                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1417                         continue;
1418
1419                 hisi_sas_init_device(device);
1420         }
1421 }
1422
1423 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1424                                              struct asd_sas_port *sas_port,
1425                                              struct domain_device *device)
1426 {
1427         struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
1428         struct ata_port *ap = device->sata_dev.ap;
1429         struct device *dev = hisi_hba->dev;
1430         int s = sizeof(struct host_to_dev_fis);
1431         int rc = TMF_RESP_FUNC_FAILED;
1432         struct asd_sas_phy *sas_phy;
1433         struct ata_link *link;
1434         u8 fis[20] = {0};
1435         u32 state;
1436
1437         state = hisi_hba->hw->get_phys_state(hisi_hba);
1438         list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) {
1439                 if (!(state & BIT(sas_phy->id)))
1440                         continue;
1441
1442                 ata_for_each_link(link, ap, EDGE) {
1443                         int pmp = sata_srst_pmp(link);
1444
1445                         tmf_task.phy_id = sas_phy->id;
1446                         hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1447                         rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
1448                                                              &tmf_task);
1449                         if (rc != TMF_RESP_FUNC_COMPLETE) {
1450                                 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1451                                         sas_phy->id, rc);
1452                                 break;
1453                         }
1454                 }
1455         }
1456 }
1457
1458 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1459 {
1460         struct device *dev = hisi_hba->dev;
1461         int port_no, rc, i;
1462
1463         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1464                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1465                 struct domain_device *device = sas_dev->sas_device;
1466
1467                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1468                         continue;
1469
1470                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1471                                                   HISI_SAS_INT_ABT_DEV, 0);
1472                 if (rc < 0)
1473                         dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1474         }
1475
1476         for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1477                 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1478                 struct asd_sas_port *sas_port = &port->sas_port;
1479                 struct domain_device *port_dev = sas_port->port_dev;
1480                 struct domain_device *device;
1481
1482                 if (!port_dev || !DEV_IS_EXPANDER(port_dev->dev_type))
1483                         continue;
1484
1485                 /* Try to find a SATA device */
1486                 list_for_each_entry(device, &sas_port->dev_list,
1487                                     dev_list_node) {
1488                         if (dev_is_sata(device)) {
1489                                 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1490                                                                  sas_port,
1491                                                                  device);
1492                                 break;
1493                         }
1494                 }
1495         }
1496 }
1497
1498 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1499 {
1500         struct Scsi_Host *shost = hisi_hba->shost;
1501
1502         down(&hisi_hba->sem);
1503         hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1504
1505         scsi_block_requests(shost);
1506         hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1507
1508         if (timer_pending(&hisi_hba->timer))
1509                 del_timer_sync(&hisi_hba->timer);
1510
1511         set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1512 }
1513 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1514
1515 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1516 {
1517         struct Scsi_Host *shost = hisi_hba->shost;
1518         u32 state;
1519
1520         /* Init and wait for PHYs to come up and all libsas event finished. */
1521         hisi_hba->hw->phys_init(hisi_hba);
1522         msleep(1000);
1523         hisi_sas_refresh_port_id(hisi_hba);
1524         clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1525         up(&hisi_hba->sem);
1526
1527         if (hisi_hba->reject_stp_links_msk)
1528                 hisi_sas_terminate_stp_reject(hisi_hba);
1529         hisi_sas_reset_init_all_devices(hisi_hba);
1530         scsi_unblock_requests(shost);
1531         clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1532
1533         state = hisi_hba->hw->get_phys_state(hisi_hba);
1534         hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state, state);
1535 }
1536 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1537
1538 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1539 {
1540         struct device *dev = hisi_hba->dev;
1541         struct Scsi_Host *shost = hisi_hba->shost;
1542         int rc;
1543
1544         if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct)
1545                 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
1546
1547         if (!hisi_hba->hw->soft_reset)
1548                 return -1;
1549
1550         if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1551                 return -1;
1552
1553         dev_info(dev, "controller resetting...\n");
1554         hisi_sas_controller_reset_prepare(hisi_hba);
1555
1556         rc = hisi_hba->hw->soft_reset(hisi_hba);
1557         if (rc) {
1558                 dev_warn(dev, "controller reset failed (%d)\n", rc);
1559                 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1560                 up(&hisi_hba->sem);
1561                 scsi_unblock_requests(shost);
1562                 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1563                 return rc;
1564         }
1565
1566         hisi_sas_controller_reset_done(hisi_hba);
1567         dev_info(dev, "controller reset complete\n");
1568
1569         return 0;
1570 }
1571
1572 static int hisi_sas_abort_task(struct sas_task *task)
1573 {
1574         struct scsi_lun lun;
1575         struct hisi_sas_tmf_task tmf_task;
1576         struct domain_device *device = task->dev;
1577         struct hisi_sas_device *sas_dev = device->lldd_dev;
1578         struct hisi_hba *hisi_hba;
1579         struct device *dev;
1580         int rc = TMF_RESP_FUNC_FAILED;
1581         unsigned long flags;
1582
1583         if (!sas_dev)
1584                 return TMF_RESP_FUNC_FAILED;
1585
1586         hisi_hba = dev_to_hisi_hba(task->dev);
1587         dev = hisi_hba->dev;
1588
1589         spin_lock_irqsave(&task->task_state_lock, flags);
1590         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1591                 struct hisi_sas_slot *slot = task->lldd_task;
1592                 struct hisi_sas_cq *cq;
1593
1594                 if (slot) {
1595                         /*
1596                          * flush tasklet to avoid free'ing task
1597                          * before using task in IO completion
1598                          */
1599                         cq = &hisi_hba->cq[slot->dlvry_queue];
1600                         tasklet_kill(&cq->tasklet);
1601                 }
1602                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1603                 rc = TMF_RESP_FUNC_COMPLETE;
1604                 goto out;
1605         }
1606         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1607         spin_unlock_irqrestore(&task->task_state_lock, flags);
1608
1609         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1610                 struct scsi_cmnd *cmnd = task->uldd_task;
1611                 struct hisi_sas_slot *slot = task->lldd_task;
1612                 u16 tag = slot->idx;
1613                 int rc2;
1614
1615                 int_to_scsilun(cmnd->device->lun, &lun);
1616                 tmf_task.tmf = TMF_ABORT_TASK;
1617                 tmf_task.tag_of_task_to_be_managed = tag;
1618
1619                 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1620                                                   &tmf_task);
1621
1622                 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1623                                                    HISI_SAS_INT_ABT_CMD, tag);
1624                 if (rc2 < 0) {
1625                         dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1626                         return TMF_RESP_FUNC_FAILED;
1627                 }
1628
1629                 /*
1630                  * If the TMF finds that the IO is not in the device and also
1631                  * the internal abort does not succeed, then it is safe to
1632                  * free the slot.
1633                  * Note: if the internal abort succeeds then the slot
1634                  * will have already been completed
1635                  */
1636                 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1637                         if (task->lldd_task)
1638                                 hisi_sas_do_release_task(hisi_hba, task, slot);
1639                 }
1640         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1641                 task->task_proto & SAS_PROTOCOL_STP) {
1642                 if (task->dev->dev_type == SAS_SATA_DEV) {
1643                         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1644                                                           HISI_SAS_INT_ABT_DEV,
1645                                                           0);
1646                         if (rc < 0) {
1647                                 dev_err(dev, "abort task: internal abort failed\n");
1648                                 goto out;
1649                         }
1650                         hisi_sas_dereg_device(hisi_hba, device);
1651                         rc = hisi_sas_softreset_ata_disk(device);
1652                 }
1653         } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1654                 /* SMP */
1655                 struct hisi_sas_slot *slot = task->lldd_task;
1656                 u32 tag = slot->idx;
1657                 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1658
1659                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1660                                                   HISI_SAS_INT_ABT_CMD, tag);
1661                 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1662                                         task->lldd_task) {
1663                         /*
1664                          * flush tasklet to avoid free'ing task
1665                          * before using task in IO completion
1666                          */
1667                         tasklet_kill(&cq->tasklet);
1668                         slot->task = NULL;
1669                 }
1670         }
1671
1672 out:
1673         if (rc != TMF_RESP_FUNC_COMPLETE)
1674                 dev_notice(dev, "abort task: rc=%d\n", rc);
1675         return rc;
1676 }
1677
1678 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1679 {
1680         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1681         struct device *dev = hisi_hba->dev;
1682         struct hisi_sas_tmf_task tmf_task;
1683         int rc = TMF_RESP_FUNC_FAILED;
1684
1685         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1686                                           HISI_SAS_INT_ABT_DEV, 0);
1687         if (rc < 0) {
1688                 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1689                 return TMF_RESP_FUNC_FAILED;
1690         }
1691         hisi_sas_dereg_device(hisi_hba, device);
1692
1693         tmf_task.tmf = TMF_ABORT_TASK_SET;
1694         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1695
1696         if (rc == TMF_RESP_FUNC_COMPLETE)
1697                 hisi_sas_release_task(hisi_hba, device);
1698
1699         return rc;
1700 }
1701
1702 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1703 {
1704         struct hisi_sas_tmf_task tmf_task;
1705         int rc;
1706
1707         tmf_task.tmf = TMF_CLEAR_ACA;
1708         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1709
1710         return rc;
1711 }
1712
1713 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1714 {
1715         struct sas_phy *local_phy = sas_get_local_phy(device);
1716         int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1717                         (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1718         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1719         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1720         struct asd_sas_phy *sas_phy = sas_ha->sas_phy[local_phy->number];
1721         struct hisi_sas_phy *phy = container_of(sas_phy,
1722                         struct hisi_sas_phy, sas_phy);
1723         DECLARE_COMPLETION_ONSTACK(phyreset);
1724
1725         if (scsi_is_sas_phy_local(local_phy)) {
1726                 phy->in_reset = 1;
1727                 phy->reset_completion = &phyreset;
1728         }
1729
1730         rc = sas_phy_reset(local_phy, reset_type);
1731         sas_put_local_phy(local_phy);
1732
1733         if (scsi_is_sas_phy_local(local_phy)) {
1734                 int ret = wait_for_completion_timeout(&phyreset, 2 * HZ);
1735                 unsigned long flags;
1736
1737                 spin_lock_irqsave(&phy->lock, flags);
1738                 phy->reset_completion = NULL;
1739                 phy->in_reset = 0;
1740                 spin_unlock_irqrestore(&phy->lock, flags);
1741
1742                 /* report PHY down if timed out */
1743                 if (!ret)
1744                         hisi_sas_phy_down(hisi_hba, sas_phy->id, 0);
1745         } else
1746                 msleep(2000);
1747
1748         return rc;
1749 }
1750
1751 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1752 {
1753         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1754         struct device *dev = hisi_hba->dev;
1755         int rc;
1756
1757         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1758                                           HISI_SAS_INT_ABT_DEV, 0);
1759         if (rc < 0) {
1760                 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1761                 return TMF_RESP_FUNC_FAILED;
1762         }
1763         hisi_sas_dereg_device(hisi_hba, device);
1764
1765         rc = hisi_sas_debug_I_T_nexus_reset(device);
1766
1767         if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1768                 hisi_sas_release_task(hisi_hba, device);
1769
1770         return rc;
1771 }
1772
1773 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1774 {
1775         struct hisi_sas_device *sas_dev = device->lldd_dev;
1776         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1777         struct device *dev = hisi_hba->dev;
1778         int rc = TMF_RESP_FUNC_FAILED;
1779
1780         if (dev_is_sata(device)) {
1781                 struct sas_phy *phy;
1782
1783                 /* Clear internal IO and then hardreset */
1784                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1785                                                   HISI_SAS_INT_ABT_DEV, 0);
1786                 if (rc < 0) {
1787                         dev_err(dev, "lu_reset: internal abort failed\n");
1788                         goto out;
1789                 }
1790                 hisi_sas_dereg_device(hisi_hba, device);
1791
1792                 phy = sas_get_local_phy(device);
1793
1794                 rc = sas_phy_reset(phy, 1);
1795
1796                 if (rc == 0)
1797                         hisi_sas_release_task(hisi_hba, device);
1798                 sas_put_local_phy(phy);
1799         } else {
1800                 struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };
1801
1802                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1803                                                   HISI_SAS_INT_ABT_DEV, 0);
1804                 if (rc < 0) {
1805                         dev_err(dev, "lu_reset: internal abort failed\n");
1806                         goto out;
1807                 }
1808                 hisi_sas_dereg_device(hisi_hba, device);
1809
1810                 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1811                 if (rc == TMF_RESP_FUNC_COMPLETE)
1812                         hisi_sas_release_task(hisi_hba, device);
1813         }
1814 out:
1815         if (rc != TMF_RESP_FUNC_COMPLETE)
1816                 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1817                              sas_dev->device_id, rc);
1818         return rc;
1819 }
1820
1821 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1822 {
1823         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1824         struct device *dev = hisi_hba->dev;
1825         HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1826         int rc, i;
1827
1828         queue_work(hisi_hba->wq, &r.work);
1829         wait_for_completion(r.completion);
1830         if (!r.done)
1831                 return TMF_RESP_FUNC_FAILED;
1832
1833         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1834                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1835                 struct domain_device *device = sas_dev->sas_device;
1836
1837                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1838                     DEV_IS_EXPANDER(device->dev_type))
1839                         continue;
1840
1841                 rc = hisi_sas_debug_I_T_nexus_reset(device);
1842                 if (rc != TMF_RESP_FUNC_COMPLETE)
1843                         dev_info(dev, "clear nexus ha: for device[%d] rc=%d\n",
1844                                  sas_dev->device_id, rc);
1845         }
1846
1847         hisi_sas_release_tasks(hisi_hba);
1848
1849         return TMF_RESP_FUNC_COMPLETE;
1850 }
1851
1852 static int hisi_sas_query_task(struct sas_task *task)
1853 {
1854         struct scsi_lun lun;
1855         struct hisi_sas_tmf_task tmf_task;
1856         int rc = TMF_RESP_FUNC_FAILED;
1857
1858         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1859                 struct scsi_cmnd *cmnd = task->uldd_task;
1860                 struct domain_device *device = task->dev;
1861                 struct hisi_sas_slot *slot = task->lldd_task;
1862                 u32 tag = slot->idx;
1863
1864                 int_to_scsilun(cmnd->device->lun, &lun);
1865                 tmf_task.tmf = TMF_QUERY_TASK;
1866                 tmf_task.tag_of_task_to_be_managed = tag;
1867
1868                 rc = hisi_sas_debug_issue_ssp_tmf(device,
1869                                                   lun.scsi_lun,
1870                                                   &tmf_task);
1871                 switch (rc) {
1872                 /* The task is still in Lun, release it then */
1873                 case TMF_RESP_FUNC_SUCC:
1874                 /* The task is not in Lun or failed, reset the phy */
1875                 case TMF_RESP_FUNC_FAILED:
1876                 case TMF_RESP_FUNC_COMPLETE:
1877                         break;
1878                 default:
1879                         rc = TMF_RESP_FUNC_FAILED;
1880                         break;
1881                 }
1882         }
1883         return rc;
1884 }
1885
1886 static int
1887 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1888                                   struct sas_task *task, int abort_flag,
1889                                   int task_tag, struct hisi_sas_dq *dq)
1890 {
1891         struct domain_device *device = task->dev;
1892         struct hisi_sas_device *sas_dev = device->lldd_dev;
1893         struct device *dev = hisi_hba->dev;
1894         struct hisi_sas_port *port;
1895         struct hisi_sas_slot *slot;
1896         struct asd_sas_port *sas_port = device->port;
1897         struct hisi_sas_cmd_hdr *cmd_hdr_base;
1898         int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1899         unsigned long flags, flags_dq = 0;
1900         int wr_q_index;
1901
1902         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1903                 return -EINVAL;
1904
1905         if (!device->port)
1906                 return -1;
1907
1908         port = to_hisi_sas_port(sas_port);
1909
1910         /* simply get a slot and send abort command */
1911         rc = hisi_sas_slot_index_alloc(hisi_hba, NULL);
1912         if (rc < 0)
1913                 goto err_out;
1914
1915         slot_idx = rc;
1916         slot = &hisi_hba->slot_info[slot_idx];
1917
1918         spin_lock_irqsave(&dq->lock, flags_dq);
1919         wr_q_index = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1920         if (wr_q_index < 0) {
1921                 spin_unlock_irqrestore(&dq->lock, flags_dq);
1922                 rc = -EAGAIN;
1923                 goto err_out_tag;
1924         }
1925         list_add_tail(&slot->delivery, &dq->list);
1926         spin_unlock_irqrestore(&dq->lock, flags_dq);
1927         spin_lock_irqsave(&sas_dev->lock, flags);
1928         list_add_tail(&slot->entry, &sas_dev->list);
1929         spin_unlock_irqrestore(&sas_dev->lock, flags);
1930
1931         dlvry_queue = dq->id;
1932         dlvry_queue_slot = wr_q_index;
1933
1934         slot->device_id = sas_dev->device_id;
1935         slot->n_elem = n_elem;
1936         slot->dlvry_queue = dlvry_queue;
1937         slot->dlvry_queue_slot = dlvry_queue_slot;
1938         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1939         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1940         slot->task = task;
1941         slot->port = port;
1942         slot->is_internal = true;
1943         task->lldd_task = slot;
1944
1945         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1946         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1947         memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
1948
1949         hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1950                                       abort_flag, task_tag);
1951
1952         spin_lock_irqsave(&task->task_state_lock, flags);
1953         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1954         spin_unlock_irqrestore(&task->task_state_lock, flags);
1955         WRITE_ONCE(slot->ready, 1);
1956         /* send abort command to the chip */
1957         spin_lock_irqsave(&dq->lock, flags);
1958         hisi_hba->hw->start_delivery(dq);
1959         spin_unlock_irqrestore(&dq->lock, flags);
1960
1961         return 0;
1962
1963 err_out_tag:
1964         hisi_sas_slot_index_free(hisi_hba, slot_idx);
1965 err_out:
1966         dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1967
1968         return rc;
1969 }
1970
1971 /**
1972  * _hisi_sas_internal_task_abort -- execute an internal
1973  * abort command for single IO command or a device
1974  * @hisi_hba: host controller struct
1975  * @device: domain device
1976  * @abort_flag: mode of operation, device or single IO
1977  * @tag: tag of IO to be aborted (only relevant to single
1978  *       IO mode)
1979  * @dq: delivery queue for this internal abort command
1980  */
1981 static int
1982 _hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1983                               struct domain_device *device, int abort_flag,
1984                               int tag, struct hisi_sas_dq *dq)
1985 {
1986         struct sas_task *task;
1987         struct hisi_sas_device *sas_dev = device->lldd_dev;
1988         struct device *dev = hisi_hba->dev;
1989         int res;
1990
1991         /*
1992          * The interface is not realized means this HW don't support internal
1993          * abort, or don't need to do internal abort. Then here, we return
1994          * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
1995          * the internal abort has been executed and returned CQ.
1996          */
1997         if (!hisi_hba->hw->prep_abort)
1998                 return TMF_RESP_FUNC_FAILED;
1999
2000         task = sas_alloc_slow_task(GFP_KERNEL);
2001         if (!task)
2002                 return -ENOMEM;
2003
2004         task->dev = device;
2005         task->task_proto = device->tproto;
2006         task->task_done = hisi_sas_task_done;
2007         task->slow_task->timer.function = hisi_sas_tmf_timedout;
2008         task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT * HZ;
2009         add_timer(&task->slow_task->timer);
2010
2011         res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
2012                                                 task, abort_flag, tag, dq);
2013         if (res) {
2014                 del_timer(&task->slow_task->timer);
2015                 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
2016                         res);
2017                 goto exit;
2018         }
2019         wait_for_completion(&task->slow_task->completion);
2020         res = TMF_RESP_FUNC_FAILED;
2021
2022         /* Internal abort timed out */
2023         if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
2024                 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
2025                         struct hisi_sas_slot *slot = task->lldd_task;
2026
2027                         if (slot) {
2028                                 struct hisi_sas_cq *cq =
2029                                         &hisi_hba->cq[slot->dlvry_queue];
2030                                 /*
2031                                  * flush tasklet to avoid free'ing task
2032                                  * before using task in IO completion
2033                                  */
2034                                 tasklet_kill(&cq->tasklet);
2035                                 slot->task = NULL;
2036                         }
2037                         dev_err(dev, "internal task abort: timeout and not done.\n");
2038
2039                         res = -EIO;
2040                         goto exit;
2041                 } else
2042                         dev_err(dev, "internal task abort: timeout.\n");
2043         }
2044
2045         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2046                 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
2047                 res = TMF_RESP_FUNC_COMPLETE;
2048                 goto exit;
2049         }
2050
2051         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2052                 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
2053                 res = TMF_RESP_FUNC_SUCC;
2054                 goto exit;
2055         }
2056
2057 exit:
2058         dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
2059                 "resp: 0x%x sts 0x%x\n",
2060                 SAS_ADDR(device->sas_addr),
2061                 task,
2062                 task->task_status.resp, /* 0 is complete, -1 is undelivered */
2063                 task->task_status.stat);
2064         sas_free_task(task);
2065
2066         return res;
2067 }
2068
2069 static int
2070 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2071                              struct domain_device *device,
2072                              int abort_flag, int tag)
2073 {
2074         struct hisi_sas_slot *slot;
2075         struct device *dev = hisi_hba->dev;
2076         struct hisi_sas_dq *dq;
2077         int i, rc;
2078
2079         switch (abort_flag) {
2080         case HISI_SAS_INT_ABT_CMD:
2081                 slot = &hisi_hba->slot_info[tag];
2082                 dq = &hisi_hba->dq[slot->dlvry_queue];
2083                 return _hisi_sas_internal_task_abort(hisi_hba, device,
2084                                                      abort_flag, tag, dq);
2085         case HISI_SAS_INT_ABT_DEV:
2086                 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2087                         struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2088                         const struct cpumask *mask = cq->pci_irq_mask;
2089
2090                         if (mask && !cpumask_intersects(cpu_online_mask, mask))
2091                                 continue;
2092                         dq = &hisi_hba->dq[i];
2093                         rc = _hisi_sas_internal_task_abort(hisi_hba, device,
2094                                                            abort_flag, tag,
2095                                                            dq);
2096                         if (rc)
2097                                 return rc;
2098                 }
2099                 break;
2100         default:
2101                 dev_err(dev, "Unrecognised internal abort flag (%d)\n",
2102                         abort_flag);
2103                 return -EINVAL;
2104         }
2105
2106         return 0;
2107 }
2108
2109 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2110 {
2111         hisi_sas_port_notify_formed(sas_phy);
2112 }
2113
2114 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2115                         u8 reg_index, u8 reg_count, u8 *write_data)
2116 {
2117         struct hisi_hba *hisi_hba = sha->lldd_ha;
2118
2119         if (!hisi_hba->hw->write_gpio)
2120                 return -EOPNOTSUPP;
2121
2122         return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2123                                 reg_index, reg_count, write_data);
2124 }
2125
2126 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2127 {
2128         phy->phy_attached = 0;
2129         phy->phy_type = 0;
2130         phy->port = NULL;
2131 }
2132
2133 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
2134 {
2135         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2136         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2137         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
2138         struct device *dev = hisi_hba->dev;
2139
2140         if (rdy) {
2141                 /* Phy down but ready */
2142                 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
2143                 hisi_sas_port_notify_formed(sas_phy);
2144         } else {
2145                 struct hisi_sas_port *port  = phy->port;
2146
2147                 if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
2148                     phy->in_reset) {
2149                         dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2150                         return;
2151                 }
2152                 /* Phy down and not ready */
2153                 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
2154                 sas_phy_disconnected(sas_phy);
2155
2156                 if (port) {
2157                         if (phy->phy_type & PORT_TYPE_SAS) {
2158                                 int port_id = port->id;
2159
2160                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2161                                                                        port_id))
2162                                         port->port_attached = 0;
2163                         } else if (phy->phy_type & PORT_TYPE_SATA)
2164                                 port->port_attached = 0;
2165                 }
2166                 hisi_sas_phy_disconnected(phy);
2167         }
2168 }
2169 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2170
2171 void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba)
2172 {
2173         int i;
2174
2175         for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2176                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2177
2178                 tasklet_kill(&cq->tasklet);
2179         }
2180 }
2181 EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
2182
2183 struct scsi_transport_template *hisi_sas_stt;
2184 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2185
2186 static struct sas_domain_function_template hisi_sas_transport_ops = {
2187         .lldd_dev_found         = hisi_sas_dev_found,
2188         .lldd_dev_gone          = hisi_sas_dev_gone,
2189         .lldd_execute_task      = hisi_sas_queue_command,
2190         .lldd_control_phy       = hisi_sas_control_phy,
2191         .lldd_abort_task        = hisi_sas_abort_task,
2192         .lldd_abort_task_set    = hisi_sas_abort_task_set,
2193         .lldd_clear_aca         = hisi_sas_clear_aca,
2194         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
2195         .lldd_lu_reset          = hisi_sas_lu_reset,
2196         .lldd_query_task        = hisi_sas_query_task,
2197         .lldd_clear_nexus_ha    = hisi_sas_clear_nexus_ha,
2198         .lldd_port_formed       = hisi_sas_port_formed,
2199         .lldd_write_gpio        = hisi_sas_write_gpio,
2200 };
2201
2202 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2203 {
2204         int i, s, j, max_command_entries = hisi_hba->hw->max_command_entries;
2205         struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2206
2207         for (i = 0; i < hisi_hba->queue_count; i++) {
2208                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2209                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2210                 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2211
2212                 s = sizeof(struct hisi_sas_cmd_hdr);
2213                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2214                         memset(&cmd_hdr[j], 0, s);
2215
2216                 dq->wr_point = 0;
2217
2218                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2219                 memset(hisi_hba->complete_hdr[i], 0, s);
2220                 cq->rd_point = 0;
2221         }
2222
2223         s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2224         memset(hisi_hba->initial_fis, 0, s);
2225
2226         s = max_command_entries * sizeof(struct hisi_sas_iost);
2227         memset(hisi_hba->iost, 0, s);
2228
2229         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2230         memset(hisi_hba->breakpoint, 0, s);
2231
2232         s = sizeof(struct hisi_sas_sata_breakpoint);
2233         for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2234                 memset(&sata_breakpoint[j], 0, s);
2235 }
2236 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2237
2238 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2239 {
2240         struct device *dev = hisi_hba->dev;
2241         int i, j, s, max_command_entries = hisi_hba->hw->max_command_entries;
2242         int max_command_entries_ru, sz_slot_buf_ru;
2243         int blk_cnt, slots_per_blk;
2244
2245         sema_init(&hisi_hba->sem, 1);
2246         spin_lock_init(&hisi_hba->lock);
2247         for (i = 0; i < hisi_hba->n_phy; i++) {
2248                 hisi_sas_phy_init(hisi_hba, i);
2249                 hisi_hba->port[i].port_attached = 0;
2250                 hisi_hba->port[i].id = -1;
2251         }
2252
2253         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2254                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2255                 hisi_hba->devices[i].device_id = i;
2256         }
2257
2258         for (i = 0; i < hisi_hba->queue_count; i++) {
2259                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2260                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2261
2262                 /* Completion queue structure */
2263                 cq->id = i;
2264                 cq->hisi_hba = hisi_hba;
2265
2266                 /* Delivery queue structure */
2267                 spin_lock_init(&dq->lock);
2268                 INIT_LIST_HEAD(&dq->list);
2269                 dq->id = i;
2270                 dq->hisi_hba = hisi_hba;
2271
2272                 /* Delivery queue */
2273                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2274                 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2275                                                 &hisi_hba->cmd_hdr_dma[i],
2276                                                 GFP_KERNEL);
2277                 if (!hisi_hba->cmd_hdr[i])
2278                         goto err_out;
2279
2280                 /* Completion queue */
2281                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2282                 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2283                                                 &hisi_hba->complete_hdr_dma[i],
2284                                                 GFP_KERNEL);
2285                 if (!hisi_hba->complete_hdr[i])
2286                         goto err_out;
2287         }
2288
2289         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2290         hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2291                                              GFP_KERNEL | __GFP_ZERO);
2292         if (!hisi_hba->itct)
2293                 goto err_out;
2294
2295         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2296                                            sizeof(struct hisi_sas_slot),
2297                                            GFP_KERNEL);
2298         if (!hisi_hba->slot_info)
2299                 goto err_out;
2300
2301         /* roundup to avoid overly large block size */
2302         max_command_entries_ru = roundup(max_command_entries, 64);
2303         if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2304                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2305         else
2306                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2307         sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2308         s = lcm(max_command_entries_ru, sz_slot_buf_ru);
2309         blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2310         slots_per_blk = s / sz_slot_buf_ru;
2311
2312         for (i = 0; i < blk_cnt; i++) {
2313                 int slot_index = i * slots_per_blk;
2314                 dma_addr_t buf_dma;
2315                 void *buf;
2316
2317                 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2318                                           GFP_KERNEL | __GFP_ZERO);
2319                 if (!buf)
2320                         goto err_out;
2321
2322                 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2323                         struct hisi_sas_slot *slot;
2324
2325                         slot = &hisi_hba->slot_info[slot_index];
2326                         slot->buf = buf;
2327                         slot->buf_dma = buf_dma;
2328                         slot->idx = slot_index;
2329
2330                         buf += sz_slot_buf_ru;
2331                         buf_dma += sz_slot_buf_ru;
2332                 }
2333         }
2334
2335         s = max_command_entries * sizeof(struct hisi_sas_iost);
2336         hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2337                                              GFP_KERNEL);
2338         if (!hisi_hba->iost)
2339                 goto err_out;
2340
2341         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2342         hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2343                                                    &hisi_hba->breakpoint_dma,
2344                                                    GFP_KERNEL);
2345         if (!hisi_hba->breakpoint)
2346                 goto err_out;
2347
2348         hisi_hba->slot_index_count = max_command_entries;
2349         s = hisi_hba->slot_index_count / BITS_PER_BYTE;
2350         hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
2351         if (!hisi_hba->slot_index_tags)
2352                 goto err_out;
2353
2354         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2355         hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2356                                                     &hisi_hba->initial_fis_dma,
2357                                                     GFP_KERNEL);
2358         if (!hisi_hba->initial_fis)
2359                 goto err_out;
2360
2361         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2362         hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2363                                         &hisi_hba->sata_breakpoint_dma,
2364                                         GFP_KERNEL);
2365         if (!hisi_hba->sata_breakpoint)
2366                 goto err_out;
2367         hisi_sas_init_mem(hisi_hba);
2368
2369         hisi_sas_slot_index_init(hisi_hba);
2370         hisi_hba->last_slot_index = hisi_hba->hw->max_command_entries -
2371                 HISI_SAS_RESERVED_IPTT_CNT;
2372
2373         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2374         if (!hisi_hba->wq) {
2375                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2376                 goto err_out;
2377         }
2378
2379         return 0;
2380 err_out:
2381         return -ENOMEM;
2382 }
2383 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2384
2385 void hisi_sas_free(struct hisi_hba *hisi_hba)
2386 {
2387         if (hisi_hba->wq)
2388                 destroy_workqueue(hisi_hba->wq);
2389 }
2390 EXPORT_SYMBOL_GPL(hisi_sas_free);
2391
2392 void hisi_sas_rst_work_handler(struct work_struct *work)
2393 {
2394         struct hisi_hba *hisi_hba =
2395                 container_of(work, struct hisi_hba, rst_work);
2396
2397         hisi_sas_controller_reset(hisi_hba);
2398 }
2399 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2400
2401 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2402 {
2403         struct hisi_sas_rst *rst =
2404                 container_of(work, struct hisi_sas_rst, work);
2405
2406         if (!hisi_sas_controller_reset(rst->hisi_hba))
2407                 rst->done = true;
2408         complete(rst->completion);
2409 }
2410 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2411
2412 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2413 {
2414         struct device *dev = hisi_hba->dev;
2415         struct platform_device *pdev = hisi_hba->platform_dev;
2416         struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2417         struct clk *refclk;
2418
2419         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2420                                           SAS_ADDR_SIZE)) {
2421                 dev_err(dev, "could not get property sas-addr\n");
2422                 return -ENOENT;
2423         }
2424
2425         if (np) {
2426                 /*
2427                  * These properties are only required for platform device-based
2428                  * controller with DT firmware.
2429                  */
2430                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2431                                         "hisilicon,sas-syscon");
2432                 if (IS_ERR(hisi_hba->ctrl)) {
2433                         dev_err(dev, "could not get syscon\n");
2434                         return -ENOENT;
2435                 }
2436
2437                 if (device_property_read_u32(dev, "ctrl-reset-reg",
2438                                              &hisi_hba->ctrl_reset_reg)) {
2439                         dev_err(dev,
2440                                 "could not get property ctrl-reset-reg\n");
2441                         return -ENOENT;
2442                 }
2443
2444                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2445                                              &hisi_hba->ctrl_reset_sts_reg)) {
2446                         dev_err(dev,
2447                                 "could not get property ctrl-reset-sts-reg\n");
2448                         return -ENOENT;
2449                 }
2450
2451                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2452                                              &hisi_hba->ctrl_clock_ena_reg)) {
2453                         dev_err(dev,
2454                                 "could not get property ctrl-clock-ena-reg\n");
2455                         return -ENOENT;
2456                 }
2457         }
2458
2459         refclk = devm_clk_get(dev, NULL);
2460         if (IS_ERR(refclk))
2461                 dev_dbg(dev, "no ref clk property\n");
2462         else
2463                 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2464
2465         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2466                 dev_err(dev, "could not get property phy-count\n");
2467                 return -ENOENT;
2468         }
2469
2470         if (device_property_read_u32(dev, "queue-count",
2471                                      &hisi_hba->queue_count)) {
2472                 dev_err(dev, "could not get property queue-count\n");
2473                 return -ENOENT;
2474         }
2475
2476         return 0;
2477 }
2478 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2479
2480 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2481                                               const struct hisi_sas_hw *hw)
2482 {
2483         struct resource *res;
2484         struct Scsi_Host *shost;
2485         struct hisi_hba *hisi_hba;
2486         struct device *dev = &pdev->dev;
2487         int error;
2488
2489         shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2490         if (!shost) {
2491                 dev_err(dev, "scsi host alloc failed\n");
2492                 return NULL;
2493         }
2494         hisi_hba = shost_priv(shost);
2495
2496         INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2497         hisi_hba->hw = hw;
2498         hisi_hba->dev = dev;
2499         hisi_hba->platform_dev = pdev;
2500         hisi_hba->shost = shost;
2501         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2502
2503         timer_setup(&hisi_hba->timer, NULL, 0);
2504
2505         if (hisi_sas_get_fw_info(hisi_hba) < 0)
2506                 goto err_out;
2507
2508         error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2509         if (error)
2510                 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
2511
2512         if (error) {
2513                 dev_err(dev, "No usable DMA addressing method\n");
2514                 goto err_out;
2515         }
2516
2517         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2518         hisi_hba->regs = devm_ioremap_resource(dev, res);
2519         if (IS_ERR(hisi_hba->regs))
2520                 goto err_out;
2521
2522         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2523         if (res) {
2524                 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2525                 if (IS_ERR(hisi_hba->sgpio_regs))
2526                         goto err_out;
2527         }
2528
2529         if (hisi_sas_alloc(hisi_hba)) {
2530                 hisi_sas_free(hisi_hba);
2531                 goto err_out;
2532         }
2533
2534         return shost;
2535 err_out:
2536         scsi_host_put(shost);
2537         dev_err(dev, "shost alloc failed\n");
2538         return NULL;
2539 }
2540
2541 int hisi_sas_probe(struct platform_device *pdev,
2542                    const struct hisi_sas_hw *hw)
2543 {
2544         struct Scsi_Host *shost;
2545         struct hisi_hba *hisi_hba;
2546         struct device *dev = &pdev->dev;
2547         struct asd_sas_phy **arr_phy;
2548         struct asd_sas_port **arr_port;
2549         struct sas_ha_struct *sha;
2550         int rc, phy_nr, port_nr, i;
2551
2552         shost = hisi_sas_shost_alloc(pdev, hw);
2553         if (!shost)
2554                 return -ENOMEM;
2555
2556         sha = SHOST_TO_SAS_HA(shost);
2557         hisi_hba = shost_priv(shost);
2558         platform_set_drvdata(pdev, sha);
2559
2560         phy_nr = port_nr = hisi_hba->n_phy;
2561
2562         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2563         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2564         if (!arr_phy || !arr_port) {
2565                 rc = -ENOMEM;
2566                 goto err_out_ha;
2567         }
2568
2569         sha->sas_phy = arr_phy;
2570         sha->sas_port = arr_port;
2571         sha->lldd_ha = hisi_hba;
2572
2573         shost->transportt = hisi_sas_stt;
2574         shost->max_id = HISI_SAS_MAX_DEVICES;
2575         shost->max_lun = ~0;
2576         shost->max_channel = 1;
2577         shost->max_cmd_len = 16;
2578         if (hisi_hba->hw->slot_index_alloc) {
2579                 shost->can_queue = hisi_hba->hw->max_command_entries;
2580                 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
2581         } else {
2582                 shost->can_queue = hisi_hba->hw->max_command_entries -
2583                         HISI_SAS_RESERVED_IPTT_CNT;
2584                 shost->cmd_per_lun = hisi_hba->hw->max_command_entries -
2585                         HISI_SAS_RESERVED_IPTT_CNT;
2586         }
2587
2588         sha->sas_ha_name = DRV_NAME;
2589         sha->dev = hisi_hba->dev;
2590         sha->lldd_module = THIS_MODULE;
2591         sha->sas_addr = &hisi_hba->sas_addr[0];
2592         sha->num_phys = hisi_hba->n_phy;
2593         sha->core.shost = hisi_hba->shost;
2594
2595         for (i = 0; i < hisi_hba->n_phy; i++) {
2596                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2597                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2598         }
2599
2600         rc = scsi_add_host(shost, &pdev->dev);
2601         if (rc)
2602                 goto err_out_ha;
2603
2604         rc = sas_register_ha(sha);
2605         if (rc)
2606                 goto err_out_register_ha;
2607
2608         rc = hisi_hba->hw->hw_init(hisi_hba);
2609         if (rc)
2610                 goto err_out_register_ha;
2611
2612         scsi_scan_host(shost);
2613
2614         return 0;
2615
2616 err_out_register_ha:
2617         scsi_remove_host(shost);
2618 err_out_ha:
2619         hisi_sas_free(hisi_hba);
2620         scsi_host_put(shost);
2621         return rc;
2622 }
2623 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2624
2625 struct dentry *hisi_sas_debugfs_dir;
2626
2627 static void hisi_sas_debugfs_snapshot_cq_reg(struct hisi_hba *hisi_hba)
2628 {
2629         int queue_entry_size = hisi_hba->hw->complete_hdr_size;
2630         int i;
2631
2632         for (i = 0; i < hisi_hba->queue_count; i++)
2633                 memcpy(hisi_hba->debugfs_complete_hdr[i],
2634                        hisi_hba->complete_hdr[i],
2635                        HISI_SAS_QUEUE_SLOTS * queue_entry_size);
2636 }
2637
2638 static void hisi_sas_debugfs_snapshot_dq_reg(struct hisi_hba *hisi_hba)
2639 {
2640         int queue_entry_size = sizeof(struct hisi_sas_cmd_hdr);
2641         int i;
2642
2643         for (i = 0; i < hisi_hba->queue_count; i++) {
2644                 struct hisi_sas_cmd_hdr *debugfs_cmd_hdr, *cmd_hdr;
2645                 int j;
2646
2647                 debugfs_cmd_hdr = hisi_hba->debugfs_cmd_hdr[i];
2648                 cmd_hdr = hisi_hba->cmd_hdr[i];
2649
2650                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2651                         memcpy(&debugfs_cmd_hdr[j], &cmd_hdr[j],
2652                                queue_entry_size);
2653         }
2654 }
2655
2656 static void hisi_sas_debugfs_snapshot_port_reg(struct hisi_hba *hisi_hba)
2657 {
2658         const struct hisi_sas_debugfs_reg *port =
2659                 hisi_hba->hw->debugfs_reg_port;
2660         int i, phy_cnt;
2661         u32 offset;
2662         u32 *databuf;
2663
2664         for (phy_cnt = 0; phy_cnt < hisi_hba->n_phy; phy_cnt++) {
2665                 databuf = (u32 *)hisi_hba->debugfs_port_reg[phy_cnt];
2666                 for (i = 0; i < port->count; i++, databuf++) {
2667                         offset = port->base_off + 4 * i;
2668                         *databuf = port->read_port_reg(hisi_hba, phy_cnt,
2669                                                        offset);
2670                 }
2671         }
2672 }
2673
2674 static void hisi_sas_debugfs_snapshot_global_reg(struct hisi_hba *hisi_hba)
2675 {
2676         u32 *databuf = (u32 *)hisi_hba->debugfs_global_reg;
2677         const struct hisi_sas_debugfs_reg *global =
2678                 hisi_hba->hw->debugfs_reg_global;
2679         int i;
2680
2681         for (i = 0; i < global->count; i++, databuf++)
2682                 *databuf = global->read_global_reg(hisi_hba, 4 * i);
2683 }
2684
2685 static void hisi_sas_debugfs_snapshot_itct_reg(struct hisi_hba *hisi_hba)
2686 {
2687         void *databuf = hisi_hba->debugfs_itct;
2688         struct hisi_sas_itct *itct;
2689         int i;
2690
2691         itct = hisi_hba->itct;
2692
2693         for (i = 0; i < HISI_SAS_MAX_ITCT_ENTRIES; i++, itct++) {
2694                 memcpy(databuf, itct, sizeof(struct hisi_sas_itct));
2695                 databuf += sizeof(struct hisi_sas_itct);
2696         }
2697 }
2698
2699 static void hisi_sas_debugfs_snapshot_iost_reg(struct hisi_hba *hisi_hba)
2700 {
2701         int max_command_entries = hisi_hba->hw->max_command_entries;
2702         void *databuf = hisi_hba->debugfs_iost;
2703         struct hisi_sas_iost *iost;
2704         int i;
2705
2706         iost = hisi_hba->iost;
2707
2708         for (i = 0; i < max_command_entries; i++, iost++) {
2709                 memcpy(databuf, iost, sizeof(struct hisi_sas_iost));
2710                 databuf += sizeof(struct hisi_sas_iost);
2711         }
2712 }
2713
2714 static const char *
2715 hisi_sas_debugfs_to_reg_name(int off, int base_off,
2716                              const struct hisi_sas_debugfs_reg_lu *lu)
2717 {
2718         for (; lu->name; lu++) {
2719                 if (off == lu->off - base_off)
2720                         return lu->name;
2721         }
2722
2723         return NULL;
2724 }
2725
2726 static void hisi_sas_debugfs_print_reg(u32 *regs_val, const void *ptr,
2727                                        struct seq_file *s)
2728 {
2729         const struct hisi_sas_debugfs_reg *reg = ptr;
2730         int i;
2731
2732         for (i = 0; i < reg->count; i++) {
2733                 int off = i * 4;
2734                 const char *name;
2735
2736                 name = hisi_sas_debugfs_to_reg_name(off, reg->base_off,
2737                                                     reg->lu);
2738
2739                 if (name)
2740                         seq_printf(s, "0x%08x 0x%08x %s\n", off,
2741                                    regs_val[i], name);
2742                 else
2743                         seq_printf(s, "0x%08x 0x%08x\n", off,
2744                                    regs_val[i]);
2745         }
2746 }
2747
2748 static int hisi_sas_debugfs_global_show(struct seq_file *s, void *p)
2749 {
2750         struct hisi_hba *hisi_hba = s->private;
2751         const struct hisi_sas_hw *hw = hisi_hba->hw;
2752         const struct hisi_sas_debugfs_reg *reg_global = hw->debugfs_reg_global;
2753
2754         hisi_sas_debugfs_print_reg(hisi_hba->debugfs_global_reg,
2755                                    reg_global, s);
2756
2757         return 0;
2758 }
2759
2760 static int hisi_sas_debugfs_global_open(struct inode *inode, struct file *filp)
2761 {
2762         return single_open(filp, hisi_sas_debugfs_global_show,
2763                            inode->i_private);
2764 }
2765
2766 static const struct file_operations hisi_sas_debugfs_global_fops = {
2767         .open = hisi_sas_debugfs_global_open,
2768         .read = seq_read,
2769         .llseek = seq_lseek,
2770         .release = single_release,
2771         .owner = THIS_MODULE,
2772 };
2773
2774 static int hisi_sas_debugfs_port_show(struct seq_file *s, void *p)
2775 {
2776         struct hisi_sas_phy *phy = s->private;
2777         struct hisi_hba *hisi_hba = phy->hisi_hba;
2778         const struct hisi_sas_hw *hw = hisi_hba->hw;
2779         const struct hisi_sas_debugfs_reg *reg_port = hw->debugfs_reg_port;
2780         u32 *databuf = hisi_hba->debugfs_port_reg[phy->sas_phy.id];
2781
2782         hisi_sas_debugfs_print_reg(databuf, reg_port, s);
2783
2784         return 0;
2785 }
2786
2787 static int hisi_sas_debugfs_port_open(struct inode *inode, struct file *filp)
2788 {
2789         return single_open(filp, hisi_sas_debugfs_port_show, inode->i_private);
2790 }
2791
2792 static const struct file_operations hisi_sas_debugfs_port_fops = {
2793         .open = hisi_sas_debugfs_port_open,
2794         .read = seq_read,
2795         .llseek = seq_lseek,
2796         .release = single_release,
2797         .owner = THIS_MODULE,
2798 };
2799
2800 static int hisi_sas_show_row_64(struct seq_file *s, int index,
2801                                 int sz, __le64 *ptr)
2802 {
2803         int i;
2804
2805         /* completion header size not fixed per HW version */
2806         seq_printf(s, "index %04d:\n\t", index);
2807         for (i = 1; i <= sz / 8; i++, ptr++) {
2808                 seq_printf(s, " 0x%016llx", le64_to_cpu(*ptr));
2809                 if (!(i % 2))
2810                         seq_puts(s, "\n\t");
2811         }
2812
2813         seq_puts(s, "\n");
2814
2815         return 0;
2816 }
2817
2818 static int hisi_sas_show_row_32(struct seq_file *s, int index,
2819                                 int sz, __le32 *ptr)
2820 {
2821         int i;
2822
2823         /* completion header size not fixed per HW version */
2824         seq_printf(s, "index %04d:\n\t", index);
2825         for (i = 1; i <= sz / 4; i++, ptr++) {
2826                 seq_printf(s, " 0x%08x", le32_to_cpu(*ptr));
2827                 if (!(i % 4))
2828                         seq_puts(s, "\n\t");
2829         }
2830         seq_puts(s, "\n");
2831
2832         return 0;
2833 }
2834
2835 static int hisi_sas_cq_show_slot(struct seq_file *s, int slot, void *cq_ptr)
2836 {
2837         struct hisi_sas_cq *cq = cq_ptr;
2838         struct hisi_hba *hisi_hba = cq->hisi_hba;
2839         void *complete_queue = hisi_hba->debugfs_complete_hdr[cq->id];
2840         __le32 *complete_hdr = complete_queue +
2841                         (hisi_hba->hw->complete_hdr_size * slot);
2842
2843         return hisi_sas_show_row_32(s, slot,
2844                                 hisi_hba->hw->complete_hdr_size,
2845                                 complete_hdr);
2846 }
2847
2848 static int hisi_sas_debugfs_cq_show(struct seq_file *s, void *p)
2849 {
2850         struct hisi_sas_cq *cq = s->private;
2851         int slot, ret;
2852
2853         for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
2854                 ret = hisi_sas_cq_show_slot(s, slot, cq);
2855                 if (ret)
2856                         return ret;
2857         }
2858         return 0;
2859 }
2860
2861 static int hisi_sas_debugfs_cq_open(struct inode *inode, struct file *filp)
2862 {
2863         return single_open(filp, hisi_sas_debugfs_cq_show, inode->i_private);
2864 }
2865
2866 static const struct file_operations hisi_sas_debugfs_cq_fops = {
2867         .open = hisi_sas_debugfs_cq_open,
2868         .read = seq_read,
2869         .llseek = seq_lseek,
2870         .release = single_release,
2871         .owner = THIS_MODULE,
2872 };
2873
2874 static int hisi_sas_dq_show_slot(struct seq_file *s, int slot, void *dq_ptr)
2875 {
2876         struct hisi_sas_dq *dq = dq_ptr;
2877         struct hisi_hba *hisi_hba = dq->hisi_hba;
2878         void *cmd_queue = hisi_hba->debugfs_cmd_hdr[dq->id];
2879         __le32 *cmd_hdr = cmd_queue +
2880                 sizeof(struct hisi_sas_cmd_hdr) * slot;
2881
2882         return hisi_sas_show_row_32(s, slot, sizeof(struct hisi_sas_cmd_hdr),
2883                                     cmd_hdr);
2884 }
2885
2886 static int hisi_sas_debugfs_dq_show(struct seq_file *s, void *p)
2887 {
2888         int slot, ret;
2889
2890         for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
2891                 ret = hisi_sas_dq_show_slot(s, slot, s->private);
2892                 if (ret)
2893                         return ret;
2894         }
2895         return 0;
2896 }
2897
2898 static int hisi_sas_debugfs_dq_open(struct inode *inode, struct file *filp)
2899 {
2900         return single_open(filp, hisi_sas_debugfs_dq_show, inode->i_private);
2901 }
2902
2903 static const struct file_operations hisi_sas_debugfs_dq_fops = {
2904         .open = hisi_sas_debugfs_dq_open,
2905         .read = seq_read,
2906         .llseek = seq_lseek,
2907         .release = single_release,
2908         .owner = THIS_MODULE,
2909 };
2910
2911 static int hisi_sas_debugfs_iost_show(struct seq_file *s, void *p)
2912 {
2913         struct hisi_hba *hisi_hba = s->private;
2914         struct hisi_sas_iost *debugfs_iost = hisi_hba->debugfs_iost;
2915         int i, ret, max_command_entries = hisi_hba->hw->max_command_entries;
2916         __le64 *iost = &debugfs_iost->qw0;
2917
2918         for (i = 0; i < max_command_entries; i++, debugfs_iost++) {
2919                 ret = hisi_sas_show_row_64(s, i, sizeof(*debugfs_iost),
2920                                            iost);
2921                 if (ret)
2922                         return ret;
2923         }
2924
2925         return 0;
2926 }
2927
2928 static int hisi_sas_debugfs_iost_open(struct inode *inode, struct file *filp)
2929 {
2930         return single_open(filp, hisi_sas_debugfs_iost_show, inode->i_private);
2931 }
2932
2933 static const struct file_operations hisi_sas_debugfs_iost_fops = {
2934         .open = hisi_sas_debugfs_iost_open,
2935         .read = seq_read,
2936         .llseek = seq_lseek,
2937         .release = single_release,
2938         .owner = THIS_MODULE,
2939 };
2940
2941 static int hisi_sas_debugfs_itct_show(struct seq_file *s, void *p)
2942 {
2943         int i, ret;
2944         struct hisi_hba *hisi_hba = s->private;
2945         struct hisi_sas_itct *debugfs_itct = hisi_hba->debugfs_itct;
2946         __le64 *itct = &debugfs_itct->qw0;
2947
2948         for (i = 0; i < HISI_SAS_MAX_ITCT_ENTRIES; i++, debugfs_itct++) {
2949                 ret = hisi_sas_show_row_64(s, i, sizeof(*debugfs_itct),
2950                                            itct);
2951                 if (ret)
2952                         return ret;
2953         }
2954
2955         return 0;
2956 }
2957
2958 static int hisi_sas_debugfs_itct_open(struct inode *inode, struct file *filp)
2959 {
2960         return single_open(filp, hisi_sas_debugfs_itct_show, inode->i_private);
2961 }
2962
2963 static const struct file_operations hisi_sas_debugfs_itct_fops = {
2964         .open = hisi_sas_debugfs_itct_open,
2965         .read = seq_read,
2966         .llseek = seq_lseek,
2967         .release = single_release,
2968         .owner = THIS_MODULE,
2969 };
2970
2971 static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
2972 {
2973         struct dentry *dump_dentry;
2974         struct dentry *dentry;
2975         char name[256];
2976         int p;
2977         int c;
2978         int d;
2979
2980         /* Create dump dir inside device dir */
2981         dump_dentry = debugfs_create_dir("dump", hisi_hba->debugfs_dir);
2982         hisi_hba->debugfs_dump_dentry = dump_dentry;
2983
2984         debugfs_create_file("global", 0400, dump_dentry, hisi_hba,
2985                             &hisi_sas_debugfs_global_fops);
2986
2987         /* Create port dir and files */
2988         dentry = debugfs_create_dir("port", dump_dentry);
2989         for (p = 0; p < hisi_hba->n_phy; p++) {
2990                 snprintf(name, 256, "%d", p);
2991
2992                 debugfs_create_file(name, 0400, dentry, &hisi_hba->phy[p],
2993                                     &hisi_sas_debugfs_port_fops);
2994         }
2995
2996         /* Create CQ dir and files */
2997         dentry = debugfs_create_dir("cq", dump_dentry);
2998         for (c = 0; c < hisi_hba->queue_count; c++) {
2999                 snprintf(name, 256, "%d", c);
3000
3001                 debugfs_create_file(name, 0400, dentry, &hisi_hba->cq[c],
3002                                     &hisi_sas_debugfs_cq_fops);
3003         }
3004
3005         /* Create DQ dir and files */
3006         dentry = debugfs_create_dir("dq", dump_dentry);
3007         for (d = 0; d < hisi_hba->queue_count; d++) {
3008                 snprintf(name, 256, "%d", d);
3009
3010                 debugfs_create_file(name, 0400, dentry, &hisi_hba->dq[d],
3011                                     &hisi_sas_debugfs_dq_fops);
3012         }
3013
3014         debugfs_create_file("iost", 0400, dump_dentry, hisi_hba,
3015                             &hisi_sas_debugfs_iost_fops);
3016
3017         debugfs_create_file("itct", 0400, dump_dentry, hisi_hba,
3018                             &hisi_sas_debugfs_itct_fops);
3019
3020         return;
3021 }
3022
3023 static void hisi_sas_debugfs_snapshot_regs(struct hisi_hba *hisi_hba)
3024 {
3025         hisi_hba->hw->snapshot_prepare(hisi_hba);
3026
3027         hisi_sas_debugfs_snapshot_global_reg(hisi_hba);
3028         hisi_sas_debugfs_snapshot_port_reg(hisi_hba);
3029         hisi_sas_debugfs_snapshot_cq_reg(hisi_hba);
3030         hisi_sas_debugfs_snapshot_dq_reg(hisi_hba);
3031         hisi_sas_debugfs_snapshot_itct_reg(hisi_hba);
3032         hisi_sas_debugfs_snapshot_iost_reg(hisi_hba);
3033
3034         hisi_sas_debugfs_create_files(hisi_hba);
3035
3036         hisi_hba->hw->snapshot_restore(hisi_hba);
3037 }
3038
3039 static ssize_t hisi_sas_debugfs_trigger_dump_write(struct file *file,
3040                                                    const char __user *user_buf,
3041                                                    size_t count, loff_t *ppos)
3042 {
3043         struct hisi_hba *hisi_hba = file->f_inode->i_private;
3044         char buf[8];
3045
3046         /* A bit racy, but don't care too much since it's only debugfs */
3047         if (hisi_hba->debugfs_snapshot)
3048                 return -EFAULT;
3049
3050         if (count > 8)
3051                 return -EFAULT;
3052
3053         if (copy_from_user(buf, user_buf, count))
3054                 return -EFAULT;
3055
3056         if (buf[0] != '1')
3057                 return -EFAULT;
3058
3059         queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
3060
3061         return count;
3062 }
3063
3064 static const struct file_operations hisi_sas_debugfs_trigger_dump_fops = {
3065         .write = &hisi_sas_debugfs_trigger_dump_write,
3066         .owner = THIS_MODULE,
3067 };
3068
3069 void hisi_sas_debugfs_work_handler(struct work_struct *work)
3070 {
3071         struct hisi_hba *hisi_hba =
3072                 container_of(work, struct hisi_hba, debugfs_work);
3073
3074         if (hisi_hba->debugfs_snapshot)
3075                 return;
3076         hisi_hba->debugfs_snapshot = true;
3077
3078         hisi_sas_debugfs_snapshot_regs(hisi_hba);
3079 }
3080 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_work_handler);
3081
3082 void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba)
3083 {
3084         int max_command_entries = hisi_hba->hw->max_command_entries;
3085         struct device *dev = hisi_hba->dev;
3086         int p, i, c, d;
3087         size_t sz;
3088
3089         hisi_hba->debugfs_dir = debugfs_create_dir(dev_name(dev),
3090                                                    hisi_sas_debugfs_dir);
3091         debugfs_create_file("trigger_dump", 0600,
3092                             hisi_hba->debugfs_dir,
3093                             hisi_hba,
3094                             &hisi_sas_debugfs_trigger_dump_fops);
3095
3096         /* Alloc buffer for global */
3097         sz = hisi_hba->hw->debugfs_reg_global->count * 4;
3098         hisi_hba->debugfs_global_reg =
3099                 devm_kmalloc(dev, sz, GFP_KERNEL);
3100
3101         if (!hisi_hba->debugfs_global_reg)
3102                 goto fail_global;
3103
3104         /* Alloc buffer for port */
3105         sz = hisi_hba->hw->debugfs_reg_port->count * 4;
3106         for (p = 0; p < hisi_hba->n_phy; p++) {
3107                 hisi_hba->debugfs_port_reg[p] =
3108                         devm_kmalloc(dev, sz, GFP_KERNEL);
3109
3110                 if (!hisi_hba->debugfs_port_reg[p])
3111                         goto fail_port;
3112         }
3113
3114         /* Alloc buffer for cq */
3115         sz = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
3116         for (c = 0; c < hisi_hba->queue_count; c++) {
3117                 hisi_hba->debugfs_complete_hdr[c] =
3118                         devm_kmalloc(dev, sz, GFP_KERNEL);
3119
3120                 if (!hisi_hba->debugfs_complete_hdr[c])
3121                         goto fail_cq;
3122         }
3123
3124         /* Alloc buffer for dq */
3125         sz = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
3126         for (d = 0; d < hisi_hba->queue_count; d++) {
3127                 hisi_hba->debugfs_cmd_hdr[d] =
3128                         devm_kmalloc(dev, sz, GFP_KERNEL);
3129
3130                 if (!hisi_hba->debugfs_cmd_hdr[d])
3131                         goto fail_iost_dq;
3132         }
3133
3134         /* Alloc buffer for iost */
3135         sz = max_command_entries * sizeof(struct hisi_sas_iost);
3136
3137         hisi_hba->debugfs_iost = devm_kmalloc(dev, sz, GFP_KERNEL);
3138         if (!hisi_hba->debugfs_iost)
3139                 goto fail_iost_dq;
3140
3141         /* Alloc buffer for itct */
3142         /* New memory allocation must be locate before itct */
3143         sz = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
3144
3145         hisi_hba->debugfs_itct = devm_kmalloc(dev, sz, GFP_KERNEL);
3146         if (!hisi_hba->debugfs_itct)
3147                 goto fail_itct;
3148
3149         return;
3150 fail_itct:
3151         devm_kfree(dev, hisi_hba->debugfs_iost);
3152 fail_iost_dq:
3153         for (i = 0; i < d; i++)
3154                 devm_kfree(dev, hisi_hba->debugfs_cmd_hdr[i]);
3155 fail_cq:
3156         for (i = 0; i < c; i++)
3157                 devm_kfree(dev, hisi_hba->debugfs_complete_hdr[i]);
3158 fail_port:
3159         for (i = 0; i < p; i++)
3160                 devm_kfree(dev, hisi_hba->debugfs_port_reg[i]);
3161         devm_kfree(dev, hisi_hba->debugfs_global_reg);
3162 fail_global:
3163         debugfs_remove_recursive(hisi_hba->debugfs_dir);
3164         dev_dbg(dev, "failed to init debugfs!\n");
3165 }
3166 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_init);
3167
3168 void hisi_sas_debugfs_exit(struct hisi_hba *hisi_hba)
3169 {
3170         debugfs_remove_recursive(hisi_hba->debugfs_dir);
3171 }
3172 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_exit);
3173
3174 int hisi_sas_remove(struct platform_device *pdev)
3175 {
3176         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
3177         struct hisi_hba *hisi_hba = sha->lldd_ha;
3178         struct Scsi_Host *shost = sha->core.shost;
3179
3180         if (timer_pending(&hisi_hba->timer))
3181                 del_timer(&hisi_hba->timer);
3182
3183         sas_unregister_ha(sha);
3184         sas_remove_host(sha->core.shost);
3185
3186         hisi_sas_free(hisi_hba);
3187         scsi_host_put(shost);
3188         return 0;
3189 }
3190 EXPORT_SYMBOL_GPL(hisi_sas_remove);
3191
3192 bool hisi_sas_debugfs_enable;
3193 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
3194 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
3195 MODULE_PARM_DESC(hisi_sas_debugfs_enable, "Enable driver debugfs (default disabled)");
3196
3197 static __init int hisi_sas_init(void)
3198 {
3199         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
3200         if (!hisi_sas_stt)
3201                 return -ENOMEM;
3202
3203         if (hisi_sas_debugfs_enable)
3204                 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
3205
3206         return 0;
3207 }
3208
3209 static __exit void hisi_sas_exit(void)
3210 {
3211         sas_release_transport(hisi_sas_stt);
3212
3213         debugfs_remove(hisi_sas_debugfs_dir);
3214 }
3215
3216 module_init(hisi_sas_init);
3217 module_exit(hisi_sas_exit);
3218
3219 MODULE_LICENSE("GPL");
3220 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
3221 MODULE_DESCRIPTION("HISILICON SAS controller driver");
3222 MODULE_ALIAS("platform:" DRV_NAME);