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
  26 u8 hisi_sas_get_ata_protocol(u8 cmd, int direction)
  27 {
  28         switch (cmd) {
  29         case ATA_CMD_FPDMA_WRITE:
  30         case ATA_CMD_FPDMA_READ:
  31         case ATA_CMD_FPDMA_RECV:
  32         case ATA_CMD_FPDMA_SEND:
  33         case ATA_CMD_NCQ_NON_DATA:
  34         return HISI_SAS_SATA_PROTOCOL_FPDMA;
  35
  36         case ATA_CMD_DOWNLOAD_MICRO:
  37         case ATA_CMD_ID_ATA:
  38         case ATA_CMD_PMP_READ:
  39         case ATA_CMD_READ_LOG_EXT:
  40         case ATA_CMD_PIO_READ:
  41         case ATA_CMD_PIO_READ_EXT:
  42         case ATA_CMD_PMP_WRITE:
  43         case ATA_CMD_WRITE_LOG_EXT:
  44         case ATA_CMD_PIO_WRITE:
  45         case ATA_CMD_PIO_WRITE_EXT:
  46         return HISI_SAS_SATA_PROTOCOL_PIO;
  47
  48         case ATA_CMD_DSM:
  49         case ATA_CMD_DOWNLOAD_MICRO_DMA:
  50         case ATA_CMD_PMP_READ_DMA:
  51         case ATA_CMD_PMP_WRITE_DMA:
  52         case ATA_CMD_READ:
  53         case ATA_CMD_READ_EXT:
  54         case ATA_CMD_READ_LOG_DMA_EXT:
  55         case ATA_CMD_READ_STREAM_DMA_EXT:
  56         case ATA_CMD_TRUSTED_RCV_DMA:
  57         case ATA_CMD_TRUSTED_SND_DMA:
  58         case ATA_CMD_WRITE:
  59         case ATA_CMD_WRITE_EXT:
  60         case ATA_CMD_WRITE_FUA_EXT:
  61         case ATA_CMD_WRITE_QUEUED:
  62         case ATA_CMD_WRITE_LOG_DMA_EXT:
  63         case ATA_CMD_WRITE_STREAM_DMA_EXT:
  64         case ATA_CMD_ZAC_MGMT_IN:
  65         return HISI_SAS_SATA_PROTOCOL_DMA;
  66
  67         case ATA_CMD_CHK_POWER:
  68         case ATA_CMD_DEV_RESET:
  69         case ATA_CMD_EDD:
  70         case ATA_CMD_FLUSH:
  71         case ATA_CMD_FLUSH_EXT:
  72         case ATA_CMD_VERIFY:
  73         case ATA_CMD_VERIFY_EXT:
  74         case ATA_CMD_SET_FEATURES:
  75         case ATA_CMD_STANDBY:
  76         case ATA_CMD_STANDBYNOW1:
  77         case ATA_CMD_ZAC_MGMT_OUT:
  78         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  79         default:
  80                 if (direction == DMA_NONE)
  81                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  82                 return HISI_SAS_SATA_PROTOCOL_PIO;
  83         }
  84 }
  85 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
  86
  87 void hisi_sas_sata_done(struct sas_task *task,
  88                             struct hisi_sas_slot *slot)
  89 {
  90         struct task_status_struct *ts = &task->task_status;
  91         struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
  92         struct hisi_sas_status_buffer *status_buf =
  93                         hisi_sas_status_buf_addr_mem(slot);
  94         u8 *iu = &status_buf->iu[0];
  95         struct dev_to_host_fis *d2h =  (struct dev_to_host_fis *)iu;
  96
  97         resp->frame_len = sizeof(struct dev_to_host_fis);
  98         memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
  99
 100         ts->buf_valid_size = sizeof(*resp);
 101 }
 102 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
 103
 104 int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag)
 105 {
 106         struct ata_queued_cmd *qc = task->uldd_task;
 107
 108         if (qc) {
 109                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 110                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 111                         *tag = qc->tag;
 112                         return 1;
 113                 }
 114         }
 115         return 0;
 116 }
 117 EXPORT_SYMBOL_GPL(hisi_sas_get_ncq_tag);
 118
 119 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
 120 {
 121         return device->port->ha->lldd_ha;
 122 }
 123
 124 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
 125 {
 126         return container_of(sas_port, struct hisi_sas_port, sas_port);
 127 }
 128 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
 129
 130 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
 131 {
 132         int phy_no;
 133
 134         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
 135                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 136 }
 137 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
 138
 139 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
 140 {
 141         void *bitmap = hisi_hba->slot_index_tags;
 142
 143         clear_bit(slot_idx, bitmap);
 144 }
 145
 146 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
 147 {
 148         hisi_sas_slot_index_clear(hisi_hba, slot_idx);
 149 }
 150
 151 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
 152 {
 153         void *bitmap = hisi_hba->slot_index_tags;
 154
 155         set_bit(slot_idx, bitmap);
 156 }
 157
 158 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
 159 {
 160         unsigned int index;
 161         void *bitmap = hisi_hba->slot_index_tags;
 162
 163         index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
 164         if (index >= hisi_hba->slot_index_count)
 165                 return -SAS_QUEUE_FULL;
 166         hisi_sas_slot_index_set(hisi_hba, index);
 167         *slot_idx = index;
 168         return 0;
 169 }
 170
 171 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
 172 {
 173         int i;
 174
 175         for (i = 0; i < hisi_hba->slot_index_count; ++i)
 176                 hisi_sas_slot_index_clear(hisi_hba, i);
 177 }
 178
 179 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
 180                              struct hisi_sas_slot *slot)
 181 {
 182
 183         if (task) {
 184                 struct device *dev = hisi_hba->dev;
 185                 struct domain_device *device = task->dev;
 186                 struct hisi_sas_device *sas_dev = device->lldd_dev;
 187
 188                 if (!task->lldd_task)
 189                         return;
 190
 191                 task->lldd_task = NULL;
 192
 193                 if (!sas_protocol_ata(task->task_proto))
 194                         if (slot->n_elem)
 195                                 dma_unmap_sg(dev, task->scatter,
 196                                              task->num_scatter,
 197                                              task->data_dir);
 198
 199                 if (sas_dev)
 200                         atomic64_dec(&sas_dev->running_req);
 201         }
 202
 203         if (slot->buf)
 204                 dma_pool_free(hisi_hba->buffer_pool, slot->buf, slot->buf_dma);
 205
 206         list_del_init(&slot->entry);
 207         slot->buf = NULL;
 208         slot->task = NULL;
 209         slot->port = NULL;
 210         hisi_sas_slot_index_free(hisi_hba, slot->idx);
 211
 212         /* slot memory is fully zeroed when it is reused */
 213 }
 214 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
 215
 216 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 217                                   struct hisi_sas_slot *slot)
 218 {
 219         return hisi_hba->hw->prep_smp(hisi_hba, slot);
 220 }
 221
 222 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 223                                   struct hisi_sas_slot *slot, int is_tmf,
 224                                   struct hisi_sas_tmf_task *tmf)
 225 {
 226         return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
 227 }
 228
 229 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 230                                   struct hisi_sas_slot *slot)
 231 {
 232         return hisi_hba->hw->prep_stp(hisi_hba, slot);
 233 }
 234
 235 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
 236                 struct hisi_sas_slot *slot,
 237                 int device_id, int abort_flag, int tag_to_abort)
 238 {
 239         return hisi_hba->hw->prep_abort(hisi_hba, slot,
 240                         device_id, abort_flag, tag_to_abort);
 241 }
 242
 243 /*
 244  * This function will issue an abort TMF regardless of whether the
 245  * task is in the sdev or not. Then it will do the task complete
 246  * cleanup and callbacks.
 247  */
 248 static void hisi_sas_slot_abort(struct work_struct *work)
 249 {
 250         struct hisi_sas_slot *abort_slot =
 251                 container_of(work, struct hisi_sas_slot, abort_slot);
 252         struct sas_task *task = abort_slot->task;
 253         struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
 254         struct scsi_cmnd *cmnd = task->uldd_task;
 255         struct hisi_sas_tmf_task tmf_task;
 256         struct scsi_lun lun;
 257         struct device *dev = hisi_hba->dev;
 258         int tag = abort_slot->idx;
 259         unsigned long flags;
 260
 261         if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
 262                 dev_err(dev, "cannot abort slot for non-ssp task\n");
 263                 goto out;
 264         }
 265
 266         int_to_scsilun(cmnd->device->lun, &lun);
 267         tmf_task.tmf = TMF_ABORT_TASK;
 268         tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
 269
 270         hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
 271 out:
 272         /* Do cleanup for this task */
 273         spin_lock_irqsave(&hisi_hba->lock, flags);
 274         hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
 275         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 276         if (task->task_done)
 277                 task->task_done(task);
 278 }
 279
 280 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_sas_dq
 281                 *dq, int is_tmf, struct hisi_sas_tmf_task *tmf,
 282                 int *pass)
 283 {
 284         struct hisi_hba *hisi_hba = dq->hisi_hba;
 285         struct domain_device *device = task->dev;
 286         struct hisi_sas_device *sas_dev = device->lldd_dev;
 287         struct hisi_sas_port *port;
 288         struct hisi_sas_slot *slot;
 289         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 290         struct asd_sas_port *sas_port = device->port;
 291         struct device *dev = hisi_hba->dev;
 292         int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
 293         unsigned long flags;
 294
 295         if (!sas_port) {
 296                 struct task_status_struct *ts = &task->task_status;
 297
 298                 ts->resp = SAS_TASK_UNDELIVERED;
 299                 ts->stat = SAS_PHY_DOWN;
 300                 /*
 301                  * libsas will use dev->port, should
 302                  * not call task_done for sata
 303                  */
 304                 if (device->dev_type != SAS_SATA_DEV)
 305                         task->task_done(task);
 306                 return SAS_PHY_DOWN;
 307         }
 308
 309         if (DEV_IS_GONE(sas_dev)) {
 310                 if (sas_dev)
 311                         dev_info(dev, "task prep: device %d not ready\n",
 312                                  sas_dev->device_id);
 313                 else
 314                         dev_info(dev, "task prep: device %016llx not ready\n",
 315                                  SAS_ADDR(device->sas_addr));
 316
 317                 return SAS_PHY_DOWN;
 318         }
 319
 320         port = to_hisi_sas_port(sas_port);
 321         if (port && !port->port_attached) {
 322                 dev_info(dev, "task prep: %s port%d not attach device\n",
 323                          (dev_is_sata(device)) ?
 324                          "SATA/STP" : "SAS",
 325                          device->port->id);
 326
 327                 return SAS_PHY_DOWN;
 328         }
 329
 330         if (!sas_protocol_ata(task->task_proto)) {
 331                 if (task->num_scatter) {
 332                         n_elem = dma_map_sg(dev, task->scatter,
 333                                             task->num_scatter, task->data_dir);
 334                         if (!n_elem) {
 335                                 rc = -ENOMEM;
 336                                 goto prep_out;
 337                         }
 338                 }
 339         } else
 340                 n_elem = task->num_scatter;
 341
 342         spin_lock_irqsave(&hisi_hba->lock, flags);
 343         if (hisi_hba->hw->slot_index_alloc)
 344                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
 345                                                     device);
 346         else
 347                 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
 348         if (rc) {
 349                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
 350                 goto err_out;
 351         }
 352         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 353
 354         rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
 355         if (rc)
 356                 goto err_out_tag;
 357
 358         dlvry_queue = dq->id;
 359         dlvry_queue_slot = dq->wr_point;
 360         slot = &hisi_hba->slot_info[slot_idx];
 361         memset(slot, 0, sizeof(struct hisi_sas_slot));
 362
 363         slot->idx = slot_idx;
 364         slot->n_elem = n_elem;
 365         slot->dlvry_queue = dlvry_queue;
 366         slot->dlvry_queue_slot = dlvry_queue_slot;
 367         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 368         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 369         slot->task = task;
 370         slot->port = port;
 371         task->lldd_task = slot;
 372         INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
 373
 374         slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
 375                                    GFP_ATOMIC, &slot->buf_dma);
 376         if (!slot->buf) {
 377                 rc = -ENOMEM;
 378                 goto err_out_slot_buf;
 379         }
 380         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 381         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
 382         memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
 383
 384         switch (task->task_proto) {
 385         case SAS_PROTOCOL_SMP:
 386                 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
 387                 break;
 388         case SAS_PROTOCOL_SSP:
 389                 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
 390                 break;
 391         case SAS_PROTOCOL_SATA:
 392         case SAS_PROTOCOL_STP:
 393         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 394                 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
 395                 break;
 396         default:
 397                 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
 398                         task->task_proto);
 399                 rc = -EINVAL;
 400                 break;
 401         }
 402
 403         if (rc) {
 404                 dev_err(dev, "task prep: rc = 0x%x\n", rc);
 405                 goto err_out_buf;
 406         }
 407
 408         spin_lock_irqsave(&hisi_hba->lock, flags);
 409         list_add_tail(&slot->entry, &sas_dev->list);
 410         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 411         spin_lock_irqsave(&task->task_state_lock, flags);
 412         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 413         spin_unlock_irqrestore(&task->task_state_lock, flags);
 414
 415         dq->slot_prep = slot;
 416
 417         atomic64_inc(&sas_dev->running_req);
 418         ++(*pass);
 419
 420         return 0;
 421
 422 err_out_buf:
 423         dma_pool_free(hisi_hba->buffer_pool, slot->buf,
 424                 slot->buf_dma);
 425 err_out_slot_buf:
 426         /* Nothing to be done */
 427 err_out_tag:
 428         spin_lock_irqsave(&hisi_hba->lock, flags);
 429         hisi_sas_slot_index_free(hisi_hba, slot_idx);
 430         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 431 err_out:
 432         dev_err(dev, "task prep: failed[%d]!\n", rc);
 433         if (!sas_protocol_ata(task->task_proto))
 434                 if (n_elem)
 435                         dma_unmap_sg(dev, task->scatter,
 436                                      task->num_scatter,
 437                                      task->data_dir);
 438 prep_out:
 439         return rc;
 440 }
 441
 442 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
 443                               int is_tmf, struct hisi_sas_tmf_task *tmf)
 444 {
 445         u32 rc;
 446         u32 pass = 0;
 447         unsigned long flags;
 448         struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
 449         struct device *dev = hisi_hba->dev;
 450         struct domain_device *device = task->dev;
 451         struct hisi_sas_device *sas_dev = device->lldd_dev;
 452         struct hisi_sas_dq *dq = sas_dev->dq;
 453
 454         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
 455                 return -EINVAL;
 456
 457         /* protect task_prep and start_delivery sequence */
 458         spin_lock_irqsave(&dq->lock, flags);
 459         rc = hisi_sas_task_prep(task, dq, is_tmf, tmf, &pass);
 460         if (rc)
 461                 dev_err(dev, "task exec: failed[%d]!\n", rc);
 462
 463         if (likely(pass))
 464                 hisi_hba->hw->start_delivery(dq);
 465         spin_unlock_irqrestore(&dq->lock, flags);
 466
 467         return rc;
 468 }
 469
 470 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
 471 {
 472         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 473         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 474         struct sas_ha_struct *sas_ha;
 475
 476         if (!phy->phy_attached)
 477                 return;
 478
 479         sas_ha = &hisi_hba->sha;
 480         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
 481
 482         if (sas_phy->phy) {
 483                 struct sas_phy *sphy = sas_phy->phy;
 484
 485                 sphy->negotiated_linkrate = sas_phy->linkrate;
 486                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 487                 sphy->maximum_linkrate_hw =
 488                         hisi_hba->hw->phy_get_max_linkrate();
 489                 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
 490                         sphy->minimum_linkrate = phy->minimum_linkrate;
 491
 492                 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
 493                         sphy->maximum_linkrate = phy->maximum_linkrate;
 494         }
 495
 496         if (phy->phy_type & PORT_TYPE_SAS) {
 497                 struct sas_identify_frame *id;
 498
 499                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 500                 id->dev_type = phy->identify.device_type;
 501                 id->initiator_bits = SAS_PROTOCOL_ALL;
 502                 id->target_bits = phy->identify.target_port_protocols;
 503         } else if (phy->phy_type & PORT_TYPE_SATA) {
 504                 /*Nothing*/
 505         }
 506
 507         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 508         sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
 509 }
 510
 511 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 512 {
 513         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 514         struct hisi_sas_device *sas_dev = NULL;
 515         unsigned long flags;
 516         int i;
 517
 518         spin_lock_irqsave(&hisi_hba->lock, flags);
 519         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
 520                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 521                         int queue = i % hisi_hba->queue_count;
 522                         struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
 523
 524                         hisi_hba->devices[i].device_id = i;
 525                         sas_dev = &hisi_hba->devices[i];
 526                         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 527                         sas_dev->dev_type = device->dev_type;
 528                         sas_dev->hisi_hba = hisi_hba;
 529                         sas_dev->sas_device = device;
 530                         sas_dev->dq = dq;
 531                         INIT_LIST_HEAD(&hisi_hba->devices[i].list);
 532                         break;
 533                 }
 534         }
 535         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 536
 537         return sas_dev;
 538 }
 539
 540 static int hisi_sas_dev_found(struct domain_device *device)
 541 {
 542         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 543         struct domain_device *parent_dev = device->parent;
 544         struct hisi_sas_device *sas_dev;
 545         struct device *dev = hisi_hba->dev;
 546
 547         if (hisi_hba->hw->alloc_dev)
 548                 sas_dev = hisi_hba->hw->alloc_dev(device);
 549         else
 550                 sas_dev = hisi_sas_alloc_dev(device);
 551         if (!sas_dev) {
 552                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 553                         HISI_SAS_MAX_DEVICES);
 554                 return -EINVAL;
 555         }
 556
 557         device->lldd_dev = sas_dev;
 558         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 559
 560         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 561                 int phy_no;
 562                 u8 phy_num = parent_dev->ex_dev.num_phys;
 563                 struct ex_phy *phy;
 564
 565                 for (phy_no = 0; phy_no < phy_num; phy_no++) {
 566                         phy = &parent_dev->ex_dev.ex_phy[phy_no];
 567                         if (SAS_ADDR(phy->attached_sas_addr) ==
 568                                 SAS_ADDR(device->sas_addr)) {
 569                                 sas_dev->attached_phy = phy_no;
 570                                 break;
 571                         }
 572                 }
 573
 574                 if (phy_no == phy_num) {
 575                         dev_info(dev, "dev found: no attached "
 576                                  "dev:%016llx at ex:%016llx\n",
 577                                  SAS_ADDR(device->sas_addr),
 578                                  SAS_ADDR(parent_dev->sas_addr));
 579                         return -EINVAL;
 580                 }
 581         }
 582
 583         return 0;
 584 }
 585
 586 static int hisi_sas_slave_configure(struct scsi_device *sdev)
 587 {
 588         struct domain_device *dev = sdev_to_domain_dev(sdev);
 589         int ret = sas_slave_configure(sdev);
 590
 591         if (ret)
 592                 return ret;
 593         if (!dev_is_sata(dev))
 594                 sas_change_queue_depth(sdev, 64);
 595
 596         return 0;
 597 }
 598
 599 static void hisi_sas_scan_start(struct Scsi_Host *shost)
 600 {
 601         struct hisi_hba *hisi_hba = shost_priv(shost);
 602
 603         hisi_hba->hw->phys_init(hisi_hba);
 604 }
 605
 606 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 607 {
 608         struct hisi_hba *hisi_hba = shost_priv(shost);
 609         struct sas_ha_struct *sha = &hisi_hba->sha;
 610
 611         /* Wait for PHY up interrupt to occur */
 612         if (time < HZ)
 613                 return 0;
 614
 615         sas_drain_work(sha);
 616         return 1;
 617 }
 618
 619 static void hisi_sas_phyup_work(struct work_struct *work)
 620 {
 621         struct hisi_sas_phy *phy =
 622                 container_of(work, struct hisi_sas_phy, phyup_ws);
 623         struct hisi_hba *hisi_hba = phy->hisi_hba;
 624         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 625         int phy_no = sas_phy->id;
 626
 627         hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
 628         hisi_sas_bytes_dmaed(hisi_hba, phy_no);
 629 }
 630
 631 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
 632 {
 633         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 634         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 635
 636         phy->hisi_hba = hisi_hba;
 637         phy->port = NULL;
 638         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 639         sas_phy->class = SAS;
 640         sas_phy->iproto = SAS_PROTOCOL_ALL;
 641         sas_phy->tproto = 0;
 642         sas_phy->type = PHY_TYPE_PHYSICAL;
 643         sas_phy->role = PHY_ROLE_INITIATOR;
 644         sas_phy->oob_mode = OOB_NOT_CONNECTED;
 645         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 646         sas_phy->id = phy_no;
 647         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
 648         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
 649         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
 650         sas_phy->lldd_phy = phy;
 651
 652         INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
 653 }
 654
 655 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
 656 {
 657         struct sas_ha_struct *sas_ha = sas_phy->ha;
 658         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 659         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 660         struct asd_sas_port *sas_port = sas_phy->port;
 661         struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
 662         unsigned long flags;
 663
 664         if (!sas_port)
 665                 return;
 666
 667         spin_lock_irqsave(&hisi_hba->lock, flags);
 668         port->port_attached = 1;
 669         port->id = phy->port_id;
 670         phy->port = port;
 671         sas_port->lldd_port = port;
 672         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 673 }
 674
 675 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
 676                                      struct hisi_sas_slot *slot)
 677 {
 678         if (task) {
 679                 unsigned long flags;
 680                 struct task_status_struct *ts;
 681
 682                 ts = &task->task_status;
 683
 684                 ts->resp = SAS_TASK_COMPLETE;
 685                 ts->stat = SAS_ABORTED_TASK;
 686                 spin_lock_irqsave(&task->task_state_lock, flags);
 687                 task->task_state_flags &=
 688                         ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
 689                 task->task_state_flags |= SAS_TASK_STATE_DONE;
 690                 spin_unlock_irqrestore(&task->task_state_lock, flags);
 691         }
 692
 693         hisi_sas_slot_task_free(hisi_hba, task, slot);
 694 }
 695
 696 /* hisi_hba.lock should be locked */
 697 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
 698                         struct domain_device *device)
 699 {
 700         struct hisi_sas_slot *slot, *slot2;
 701         struct hisi_sas_device *sas_dev = device->lldd_dev;
 702
 703         list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
 704                 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
 705 }
 706
 707 static void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
 708 {
 709         struct hisi_sas_device *sas_dev;
 710         struct domain_device *device;
 711         int i;
 712
 713         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
 714                 sas_dev = &hisi_hba->devices[i];
 715                 device = sas_dev->sas_device;
 716
 717                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
 718                     !device)
 719                         continue;
 720
 721                 hisi_sas_release_task(hisi_hba, device);
 722         }
 723 }
 724
 725 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
 726                                 struct domain_device *device)
 727 {
 728         if (hisi_hba->hw->dereg_device)
 729                 hisi_hba->hw->dereg_device(hisi_hba, device);
 730 }
 731
 732 static void hisi_sas_dev_gone(struct domain_device *device)
 733 {
 734         struct hisi_sas_device *sas_dev = device->lldd_dev;
 735         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 736         struct device *dev = hisi_hba->dev;
 737
 738         dev_info(dev, "found dev[%d:%x] is gone\n",
 739                  sas_dev->device_id, sas_dev->dev_type);
 740
 741         if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
 742                 hisi_sas_internal_task_abort(hisi_hba, device,
 743                                      HISI_SAS_INT_ABT_DEV, 0);
 744
 745                 hisi_sas_dereg_device(hisi_hba, device);
 746
 747                 hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
 748                 device->lldd_dev = NULL;
 749                 memset(sas_dev, 0, sizeof(*sas_dev));
 750         }
 751
 752         if (hisi_hba->hw->free_device)
 753                 hisi_hba->hw->free_device(sas_dev);
 754         sas_dev->dev_type = SAS_PHY_UNUSED;
 755 }
 756
 757 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
 758 {
 759         return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
 760 }
 761
 762 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
 763                                 void *funcdata)
 764 {
 765         struct sas_ha_struct *sas_ha = sas_phy->ha;
 766         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 767         int phy_no = sas_phy->id;
 768
 769         switch (func) {
 770         case PHY_FUNC_HARD_RESET:
 771                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
 772                 break;
 773
 774         case PHY_FUNC_LINK_RESET:
 775                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 776                 msleep(100);
 777                 hisi_hba->hw->phy_start(hisi_hba, phy_no);
 778                 break;
 779
 780         case PHY_FUNC_DISABLE:
 781                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 782                 break;
 783
 784         case PHY_FUNC_SET_LINK_RATE:
 785                 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
 786                 break;
 787         case PHY_FUNC_GET_EVENTS:
 788                 if (hisi_hba->hw->get_events) {
 789                         hisi_hba->hw->get_events(hisi_hba, phy_no);
 790                         break;
 791                 }
 792                 /* fallthru */
 793         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 794         default:
 795                 return -EOPNOTSUPP;
 796         }
 797         return 0;
 798 }
 799
 800 static void hisi_sas_task_done(struct sas_task *task)
 801 {
 802         if (!del_timer(&task->slow_task->timer))
 803                 return;
 804         complete(&task->slow_task->completion);
 805 }
 806
 807 static void hisi_sas_tmf_timedout(struct timer_list *t)
 808 {
 809         struct sas_task_slow *slow = from_timer(slow, t, timer);
 810         struct sas_task *task = slow->task;
 811         unsigned long flags;
 812
 813         spin_lock_irqsave(&task->task_state_lock, flags);
 814         if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
 815                 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 816         spin_unlock_irqrestore(&task->task_state_lock, flags);
 817
 818         complete(&task->slow_task->completion);
 819 }
 820
 821 #define TASK_TIMEOUT 20
 822 #define TASK_RETRY 3
 823 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
 824                                            void *parameter, u32 para_len,
 825                                            struct hisi_sas_tmf_task *tmf)
 826 {
 827         struct hisi_sas_device *sas_dev = device->lldd_dev;
 828         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
 829         struct device *dev = hisi_hba->dev;
 830         struct sas_task *task;
 831         int res, retry;
 832
 833         for (retry = 0; retry < TASK_RETRY; retry++) {
 834                 task = sas_alloc_slow_task(GFP_KERNEL);
 835                 if (!task)
 836                         return -ENOMEM;
 837
 838                 task->dev = device;
 839                 task->task_proto = device->tproto;
 840
 841                 if (dev_is_sata(device)) {
 842                         task->ata_task.device_control_reg_update = 1;
 843                         memcpy(&task->ata_task.fis, parameter, para_len);
 844                 } else {
 845                         memcpy(&task->ssp_task, parameter, para_len);
 846                 }
 847                 task->task_done = hisi_sas_task_done;
 848
 849                 task->slow_task->timer.function = hisi_sas_tmf_timedout;
 850                 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
 851                 add_timer(&task->slow_task->timer);
 852
 853                 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
 854
 855                 if (res) {
 856                         del_timer(&task->slow_task->timer);
 857                         dev_err(dev, "abort tmf: executing internal task failed: %d\n",
 858                                 res);
 859                         goto ex_err;
 860                 }
 861
 862                 wait_for_completion(&task->slow_task->completion);
 863                 res = TMF_RESP_FUNC_FAILED;
 864                 /* Even TMF timed out, return direct. */
 865                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 866                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 867                                 struct hisi_sas_slot *slot = task->lldd_task;
 868
 869                                 dev_err(dev, "abort tmf: TMF task timeout\n");
 870                                 if (slot)
 871                                         slot->task = NULL;
 872
 873                                 goto ex_err;
 874                         }
 875                 }
 876
 877                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 878                      task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
 879                         res = TMF_RESP_FUNC_COMPLETE;
 880                         break;
 881                 }
 882
 883                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 884                         task->task_status.stat == TMF_RESP_FUNC_SUCC) {
 885                         res = TMF_RESP_FUNC_SUCC;
 886                         break;
 887                 }
 888
 889                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 890                       task->task_status.stat == SAS_DATA_UNDERRUN) {
 891                         /* no error, but return the number of bytes of
 892                          * underrun
 893                          */
 894                         dev_warn(dev, "abort tmf: task to dev %016llx "
 895                                  "resp: 0x%x sts 0x%x underrun\n",
 896                                  SAS_ADDR(device->sas_addr),
 897                                  task->task_status.resp,
 898                                  task->task_status.stat);
 899                         res = task->task_status.residual;
 900                         break;
 901                 }
 902
 903                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 904                         task->task_status.stat == SAS_DATA_OVERRUN) {
 905                         dev_warn(dev, "abort tmf: blocked task error\n");
 906                         res = -EMSGSIZE;
 907                         break;
 908                 }
 909
 910                 dev_warn(dev, "abort tmf: task to dev "
 911                          "%016llx resp: 0x%x status 0x%x\n",
 912                          SAS_ADDR(device->sas_addr), task->task_status.resp,
 913                          task->task_status.stat);
 914                 sas_free_task(task);
 915                 task = NULL;
 916         }
 917 ex_err:
 918         if (retry == TASK_RETRY)
 919                 dev_warn(dev, "abort tmf: executing internal task failed!\n");
 920         sas_free_task(task);
 921         return res;
 922 }
 923
 924 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
 925                 bool reset, int pmp, u8 *fis)
 926 {
 927         struct ata_taskfile tf;
 928
 929         ata_tf_init(dev, &tf);
 930         if (reset)
 931                 tf.ctl |= ATA_SRST;
 932         else
 933                 tf.ctl &= ~ATA_SRST;
 934         tf.command = ATA_CMD_DEV_RESET;
 935         ata_tf_to_fis(&tf, pmp, 0, fis);
 936 }
 937
 938 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
 939 {
 940         u8 fis[20] = {0};
 941         struct ata_port *ap = device->sata_dev.ap;
 942         struct ata_link *link;
 943         int rc = TMF_RESP_FUNC_FAILED;
 944         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 945         struct device *dev = hisi_hba->dev;
 946         int s = sizeof(struct host_to_dev_fis);
 947         unsigned long flags;
 948
 949         ata_for_each_link(link, ap, EDGE) {
 950                 int pmp = sata_srst_pmp(link);
 951
 952                 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
 953                 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
 954                 if (rc != TMF_RESP_FUNC_COMPLETE)
 955                         break;
 956         }
 957
 958         if (rc == TMF_RESP_FUNC_COMPLETE) {
 959                 ata_for_each_link(link, ap, EDGE) {
 960                         int pmp = sata_srst_pmp(link);
 961
 962                         hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
 963                         rc = hisi_sas_exec_internal_tmf_task(device, fis,
 964                                                              s, NULL);
 965                         if (rc != TMF_RESP_FUNC_COMPLETE)
 966                                 dev_err(dev, "ata disk de-reset failed\n");
 967                 }
 968         } else {
 969                 dev_err(dev, "ata disk reset failed\n");
 970         }
 971
 972         if (rc == TMF_RESP_FUNC_COMPLETE) {
 973                 spin_lock_irqsave(&hisi_hba->lock, flags);
 974                 hisi_sas_release_task(hisi_hba, device);
 975                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
 976         }
 977
 978         return rc;
 979 }
 980
 981 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
 982                                 u8 *lun, struct hisi_sas_tmf_task *tmf)
 983 {
 984         struct sas_ssp_task ssp_task;
 985
 986         if (!(device->tproto & SAS_PROTOCOL_SSP))
 987                 return TMF_RESP_FUNC_ESUPP;
 988
 989         memcpy(ssp_task.LUN, lun, 8);
 990
 991         return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
 992                                 sizeof(ssp_task), tmf);
 993 }
 994
 995 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
 996 {
 997         u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
 998         int i;
 999
1000         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1001                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1002                 struct domain_device *device = sas_dev->sas_device;
1003                 struct asd_sas_port *sas_port;
1004                 struct hisi_sas_port *port;
1005                 struct hisi_sas_phy *phy = NULL;
1006                 struct asd_sas_phy *sas_phy;
1007
1008                 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1009                                 || !device || !device->port)
1010                         continue;
1011
1012                 sas_port = device->port;
1013                 port = to_hisi_sas_port(sas_port);
1014
1015                 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1016                         if (state & BIT(sas_phy->id)) {
1017                                 phy = sas_phy->lldd_phy;
1018                                 break;
1019                         }
1020
1021                 if (phy) {
1022                         port->id = phy->port_id;
1023
1024                         /* Update linkrate of directly attached device. */
1025                         if (!device->parent)
1026                                 device->linkrate = phy->sas_phy.linkrate;
1027
1028                         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1029                 } else
1030                         port->id = 0xff;
1031         }
1032 }
1033
1034 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1035                               u32 state)
1036 {
1037         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1038         struct asd_sas_port *_sas_port = NULL;
1039         int phy_no;
1040
1041         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1042                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1043                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1044                 struct asd_sas_port *sas_port = sas_phy->port;
1045                 bool do_port_check = !!(_sas_port != sas_port);
1046
1047                 if (!sas_phy->phy->enabled)
1048                         continue;
1049
1050                 /* Report PHY state change to libsas */
1051                 if (state & BIT(phy_no)) {
1052                         if (do_port_check && sas_port && sas_port->port_dev) {
1053                                 struct domain_device *dev = sas_port->port_dev;
1054
1055                                 _sas_port = sas_port;
1056
1057                                 if (DEV_IS_EXPANDER(dev->dev_type))
1058                                         sas_ha->notify_port_event(sas_phy,
1059                                                         PORTE_BROADCAST_RCVD);
1060                         }
1061                 } else if (old_state & (1 << phy_no))
1062                         /* PHY down but was up before */
1063                         hisi_sas_phy_down(hisi_hba, phy_no, 0);
1064
1065         }
1066 }
1067
1068 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1069 {
1070         struct device *dev = hisi_hba->dev;
1071         struct Scsi_Host *shost = hisi_hba->shost;
1072         u32 old_state, state;
1073         unsigned long flags;
1074         int rc;
1075
1076         if (!hisi_hba->hw->soft_reset)
1077                 return -1;
1078
1079         if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1080                 return -1;
1081
1082         dev_info(dev, "controller resetting...\n");
1083         old_state = hisi_hba->hw->get_phys_state(hisi_hba);
1084
1085         scsi_block_requests(shost);
1086         set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1087         rc = hisi_hba->hw->soft_reset(hisi_hba);
1088         if (rc) {
1089                 dev_warn(dev, "controller reset failed (%d)\n", rc);
1090                 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1091                 scsi_unblock_requests(shost);
1092                 goto out;
1093         }
1094         spin_lock_irqsave(&hisi_hba->lock, flags);
1095         hisi_sas_release_tasks(hisi_hba);
1096         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1097
1098         clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1099
1100         /* Init and wait for PHYs to come up and all libsas event finished. */
1101         hisi_hba->hw->phys_init(hisi_hba);
1102         msleep(1000);
1103         hisi_sas_refresh_port_id(hisi_hba);
1104         scsi_unblock_requests(shost);
1105
1106         state = hisi_hba->hw->get_phys_state(hisi_hba);
1107         hisi_sas_rescan_topology(hisi_hba, old_state, state);
1108         dev_info(dev, "controller reset complete\n");
1109
1110 out:
1111         clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1112
1113         return rc;
1114 }
1115
1116 static int hisi_sas_abort_task(struct sas_task *task)
1117 {
1118         struct scsi_lun lun;
1119         struct hisi_sas_tmf_task tmf_task;
1120         struct domain_device *device = task->dev;
1121         struct hisi_sas_device *sas_dev = device->lldd_dev;
1122         struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
1123         struct device *dev = hisi_hba->dev;
1124         int rc = TMF_RESP_FUNC_FAILED;
1125         unsigned long flags;
1126
1127         if (!sas_dev) {
1128                 dev_warn(dev, "Device has been removed\n");
1129                 return TMF_RESP_FUNC_FAILED;
1130         }
1131
1132         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1133                 rc = TMF_RESP_FUNC_COMPLETE;
1134                 goto out;
1135         }
1136
1137         sas_dev->dev_status = HISI_SAS_DEV_EH;
1138         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1139                 struct scsi_cmnd *cmnd = task->uldd_task;
1140                 struct hisi_sas_slot *slot = task->lldd_task;
1141                 u32 tag = slot->idx;
1142                 int rc2;
1143
1144                 int_to_scsilun(cmnd->device->lun, &lun);
1145                 tmf_task.tmf = TMF_ABORT_TASK;
1146                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1147
1148                 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1149                                                   &tmf_task);
1150
1151                 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1152                                                    HISI_SAS_INT_ABT_CMD, tag);
1153                 /*
1154                  * If the TMF finds that the IO is not in the device and also
1155                  * the internal abort does not succeed, then it is safe to
1156                  * free the slot.
1157                  * Note: if the internal abort succeeds then the slot
1158                  * will have already been completed
1159                  */
1160                 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1161                         if (task->lldd_task) {
1162                                 spin_lock_irqsave(&hisi_hba->lock, flags);
1163                                 hisi_sas_do_release_task(hisi_hba, task, slot);
1164                                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1165                         }
1166                 }
1167         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1168                 task->task_proto & SAS_PROTOCOL_STP) {
1169                 if (task->dev->dev_type == SAS_SATA_DEV) {
1170                         hisi_sas_internal_task_abort(hisi_hba, device,
1171                                                      HISI_SAS_INT_ABT_DEV, 0);
1172                         hisi_sas_dereg_device(hisi_hba, device);
1173                         rc = hisi_sas_softreset_ata_disk(device);
1174                 }
1175         } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1176                 /* SMP */
1177                 struct hisi_sas_slot *slot = task->lldd_task;
1178                 u32 tag = slot->idx;
1179
1180                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1181                              HISI_SAS_INT_ABT_CMD, tag);
1182                 if (rc == TMF_RESP_FUNC_FAILED && task->lldd_task) {
1183                         spin_lock_irqsave(&hisi_hba->lock, flags);
1184                         hisi_sas_do_release_task(hisi_hba, task, slot);
1185                         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1186                 }
1187         }
1188
1189 out:
1190         if (rc != TMF_RESP_FUNC_COMPLETE)
1191                 dev_notice(dev, "abort task: rc=%d\n", rc);
1192         return rc;
1193 }
1194
1195 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1196 {
1197         struct hisi_sas_tmf_task tmf_task;
1198         int rc = TMF_RESP_FUNC_FAILED;
1199
1200         tmf_task.tmf = TMF_ABORT_TASK_SET;
1201         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1202
1203         return rc;
1204 }
1205
1206 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1207 {
1208         int rc = TMF_RESP_FUNC_FAILED;
1209         struct hisi_sas_tmf_task tmf_task;
1210
1211         tmf_task.tmf = TMF_CLEAR_ACA;
1212         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1213
1214         return rc;
1215 }
1216
1217 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1218 {
1219         struct sas_phy *phy = sas_get_local_phy(device);
1220         int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1221                         (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1222         rc = sas_phy_reset(phy, reset_type);
1223         sas_put_local_phy(phy);
1224         msleep(2000);
1225         return rc;
1226 }
1227
1228 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1229 {
1230         struct hisi_sas_device *sas_dev = device->lldd_dev;
1231         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1232         unsigned long flags;
1233         int rc = TMF_RESP_FUNC_FAILED;
1234
1235         if (sas_dev->dev_status != HISI_SAS_DEV_EH)
1236                 return TMF_RESP_FUNC_FAILED;
1237         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1238
1239         hisi_sas_internal_task_abort(hisi_hba, device,
1240                                         HISI_SAS_INT_ABT_DEV, 0);
1241         hisi_sas_dereg_device(hisi_hba, device);
1242
1243         rc = hisi_sas_debug_I_T_nexus_reset(device);
1244
1245         if (rc == TMF_RESP_FUNC_COMPLETE) {
1246                 spin_lock_irqsave(&hisi_hba->lock, flags);
1247                 hisi_sas_release_task(hisi_hba, device);
1248                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1249         }
1250         return rc;
1251 }
1252
1253 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1254 {
1255         struct hisi_sas_device *sas_dev = device->lldd_dev;
1256         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1257         struct device *dev = hisi_hba->dev;
1258         unsigned long flags;
1259         int rc = TMF_RESP_FUNC_FAILED;
1260
1261         sas_dev->dev_status = HISI_SAS_DEV_EH;
1262         if (dev_is_sata(device)) {
1263                 struct sas_phy *phy;
1264
1265                 /* Clear internal IO and then hardreset */
1266                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1267                                                   HISI_SAS_INT_ABT_DEV, 0);
1268                 if (rc == TMF_RESP_FUNC_FAILED)
1269                         goto out;
1270                 hisi_sas_dereg_device(hisi_hba, device);
1271
1272                 phy = sas_get_local_phy(device);
1273
1274                 rc = sas_phy_reset(phy, 1);
1275
1276                 if (rc == 0) {
1277                         spin_lock_irqsave(&hisi_hba->lock, flags);
1278                         hisi_sas_release_task(hisi_hba, device);
1279                         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1280                 }
1281                 sas_put_local_phy(phy);
1282         } else {
1283                 struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };
1284
1285                 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1286                 if (rc == TMF_RESP_FUNC_COMPLETE) {
1287                         spin_lock_irqsave(&hisi_hba->lock, flags);
1288                         hisi_sas_release_task(hisi_hba, device);
1289                         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1290                 }
1291         }
1292 out:
1293         if (rc != TMF_RESP_FUNC_COMPLETE)
1294                 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1295                              sas_dev->device_id, rc);
1296         return rc;
1297 }
1298
1299 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1300 {
1301         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1302
1303         return hisi_sas_controller_reset(hisi_hba);
1304 }
1305
1306 static int hisi_sas_query_task(struct sas_task *task)
1307 {
1308         struct scsi_lun lun;
1309         struct hisi_sas_tmf_task tmf_task;
1310         int rc = TMF_RESP_FUNC_FAILED;
1311
1312         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1313                 struct scsi_cmnd *cmnd = task->uldd_task;
1314                 struct domain_device *device = task->dev;
1315                 struct hisi_sas_slot *slot = task->lldd_task;
1316                 u32 tag = slot->idx;
1317
1318                 int_to_scsilun(cmnd->device->lun, &lun);
1319                 tmf_task.tmf = TMF_QUERY_TASK;
1320                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1321
1322                 rc = hisi_sas_debug_issue_ssp_tmf(device,
1323                                                   lun.scsi_lun,
1324                                                   &tmf_task);
1325                 switch (rc) {
1326                 /* The task is still in Lun, release it then */
1327                 case TMF_RESP_FUNC_SUCC:
1328                 /* The task is not in Lun or failed, reset the phy */
1329                 case TMF_RESP_FUNC_FAILED:
1330                 case TMF_RESP_FUNC_COMPLETE:
1331                         break;
1332                 default:
1333                         rc = TMF_RESP_FUNC_FAILED;
1334                         break;
1335                 }
1336         }
1337         return rc;
1338 }
1339
1340 static int
1341 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1342                                   struct sas_task *task, int abort_flag,
1343                                   int task_tag)
1344 {
1345         struct domain_device *device = task->dev;
1346         struct hisi_sas_device *sas_dev = device->lldd_dev;
1347         struct device *dev = hisi_hba->dev;
1348         struct hisi_sas_port *port;
1349         struct hisi_sas_slot *slot;
1350         struct asd_sas_port *sas_port = device->port;
1351         struct hisi_sas_cmd_hdr *cmd_hdr_base;
1352         struct hisi_sas_dq *dq = sas_dev->dq;
1353         int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1354         unsigned long flags, flags_dq;
1355
1356         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1357                 return -EINVAL;
1358
1359         if (!device->port)
1360                 return -1;
1361
1362         port = to_hisi_sas_port(sas_port);
1363
1364         /* simply get a slot and send abort command */
1365         spin_lock_irqsave(&hisi_hba->lock, flags);
1366         rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1367         if (rc) {
1368                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1369                 goto err_out;
1370         }
1371         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1372
1373         spin_lock_irqsave(&dq->lock, flags_dq);
1374         rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1375         if (rc)
1376                 goto err_out_tag;
1377
1378         dlvry_queue = dq->id;
1379         dlvry_queue_slot = dq->wr_point;
1380
1381         slot = &hisi_hba->slot_info[slot_idx];
1382         memset(slot, 0, sizeof(struct hisi_sas_slot));
1383
1384         slot->idx = slot_idx;
1385         slot->n_elem = n_elem;
1386         slot->dlvry_queue = dlvry_queue;
1387         slot->dlvry_queue_slot = dlvry_queue_slot;
1388         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1389         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1390         slot->task = task;
1391         slot->port = port;
1392         task->lldd_task = slot;
1393
1394         slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
1395                         GFP_ATOMIC, &slot->buf_dma);
1396         if (!slot->buf) {
1397                 rc = -ENOMEM;
1398                 goto err_out_tag;
1399         }
1400
1401         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1402         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1403         memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
1404
1405         rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1406                                       abort_flag, task_tag);
1407         if (rc)
1408                 goto err_out_buf;
1409
1410         spin_lock_irqsave(&hisi_hba->lock, flags);
1411         list_add_tail(&slot->entry, &sas_dev->list);
1412         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1413         spin_lock_irqsave(&task->task_state_lock, flags);
1414         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1415         spin_unlock_irqrestore(&task->task_state_lock, flags);
1416
1417         dq->slot_prep = slot;
1418
1419         atomic64_inc(&sas_dev->running_req);
1420
1421         /* send abort command to the chip */
1422         hisi_hba->hw->start_delivery(dq);
1423         spin_unlock_irqrestore(&dq->lock, flags_dq);
1424
1425         return 0;
1426
1427 err_out_buf:
1428         dma_pool_free(hisi_hba->buffer_pool, slot->buf,
1429                 slot->buf_dma);
1430 err_out_tag:
1431         spin_lock_irqsave(&hisi_hba->lock, flags);
1432         hisi_sas_slot_index_free(hisi_hba, slot_idx);
1433         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1434         spin_unlock_irqrestore(&dq->lock, flags_dq);
1435 err_out:
1436         dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1437
1438         return rc;
1439 }
1440
1441 /**
1442  * hisi_sas_internal_task_abort -- execute an internal
1443  * abort command for single IO command or a device
1444  * @hisi_hba: host controller struct
1445  * @device: domain device
1446  * @abort_flag: mode of operation, device or single IO
1447  * @tag: tag of IO to be aborted (only relevant to single
1448  *       IO mode)
1449  */
1450 static int
1451 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1452                              struct domain_device *device,
1453                              int abort_flag, int tag)
1454 {
1455         struct sas_task *task;
1456         struct hisi_sas_device *sas_dev = device->lldd_dev;
1457         struct device *dev = hisi_hba->dev;
1458         int res;
1459
1460         if (!hisi_hba->hw->prep_abort)
1461                 return -EOPNOTSUPP;
1462
1463         task = sas_alloc_slow_task(GFP_KERNEL);
1464         if (!task)
1465                 return -ENOMEM;
1466
1467         task->dev = device;
1468         task->task_proto = device->tproto;
1469         task->task_done = hisi_sas_task_done;
1470         task->slow_task->timer.function = hisi_sas_tmf_timedout;
1471         task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
1472         add_timer(&task->slow_task->timer);
1473
1474         res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1475                                                 task, abort_flag, tag);
1476         if (res) {
1477                 del_timer(&task->slow_task->timer);
1478                 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1479                         res);
1480                 goto exit;
1481         }
1482         wait_for_completion(&task->slow_task->completion);
1483         res = TMF_RESP_FUNC_FAILED;
1484
1485         /* Internal abort timed out */
1486         if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1487                 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1488                         struct hisi_sas_slot *slot = task->lldd_task;
1489
1490                         if (slot)
1491                                 slot->task = NULL;
1492                         dev_err(dev, "internal task abort: timeout.\n");
1493                         goto exit;
1494                 }
1495         }
1496
1497         if (task->task_status.resp == SAS_TASK_COMPLETE &&
1498                 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1499                 res = TMF_RESP_FUNC_COMPLETE;
1500                 goto exit;
1501         }
1502
1503         if (task->task_status.resp == SAS_TASK_COMPLETE &&
1504                 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1505                 res = TMF_RESP_FUNC_SUCC;
1506                 goto exit;
1507         }
1508
1509 exit:
1510         dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1511                 "resp: 0x%x sts 0x%x\n",
1512                 SAS_ADDR(device->sas_addr),
1513                 task,
1514                 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1515                 task->task_status.stat);
1516         sas_free_task(task);
1517
1518         return res;
1519 }
1520
1521 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1522 {
1523         hisi_sas_port_notify_formed(sas_phy);
1524 }
1525
1526 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1527 {
1528         phy->phy_attached = 0;
1529         phy->phy_type = 0;
1530         phy->port = NULL;
1531 }
1532
1533 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1534 {
1535         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1536         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1537         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1538
1539         if (rdy) {
1540                 /* Phy down but ready */
1541                 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1542                 hisi_sas_port_notify_formed(sas_phy);
1543         } else {
1544                 struct hisi_sas_port *port  = phy->port;
1545
1546                 /* Phy down and not ready */
1547                 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1548                 sas_phy_disconnected(sas_phy);
1549
1550                 if (port) {
1551                         if (phy->phy_type & PORT_TYPE_SAS) {
1552                                 int port_id = port->id;
1553
1554                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1555                                                                        port_id))
1556                                         port->port_attached = 0;
1557                         } else if (phy->phy_type & PORT_TYPE_SATA)
1558                                 port->port_attached = 0;
1559                 }
1560                 hisi_sas_phy_disconnected(phy);
1561         }
1562 }
1563 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1564
1565 void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba)
1566 {
1567         int i;
1568
1569         for (i = 0; i < hisi_hba->queue_count; i++) {
1570                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1571
1572                 tasklet_kill(&cq->tasklet);
1573         }
1574 }
1575 EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
1576
1577 struct scsi_transport_template *hisi_sas_stt;
1578 EXPORT_SYMBOL_GPL(hisi_sas_stt);
1579
1580 static struct scsi_host_template _hisi_sas_sht = {
1581         .module                 = THIS_MODULE,
1582         .name                   = DRV_NAME,
1583         .queuecommand           = sas_queuecommand,
1584         .target_alloc           = sas_target_alloc,
1585         .slave_configure        = hisi_sas_slave_configure,
1586         .scan_finished          = hisi_sas_scan_finished,
1587         .scan_start             = hisi_sas_scan_start,
1588         .change_queue_depth     = sas_change_queue_depth,
1589         .bios_param             = sas_bios_param,
1590         .can_queue              = 1,
1591         .this_id                = -1,
1592         .sg_tablesize           = SG_ALL,
1593         .max_sectors            = SCSI_DEFAULT_MAX_SECTORS,
1594         .use_clustering         = ENABLE_CLUSTERING,
1595         .eh_device_reset_handler = sas_eh_device_reset_handler,
1596         .eh_target_reset_handler = sas_eh_target_reset_handler,
1597         .target_destroy         = sas_target_destroy,
1598         .ioctl                  = sas_ioctl,
1599 };
1600 struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
1601 EXPORT_SYMBOL_GPL(hisi_sas_sht);
1602
1603 static struct sas_domain_function_template hisi_sas_transport_ops = {
1604         .lldd_dev_found         = hisi_sas_dev_found,
1605         .lldd_dev_gone          = hisi_sas_dev_gone,
1606         .lldd_execute_task      = hisi_sas_queue_command,
1607         .lldd_control_phy       = hisi_sas_control_phy,
1608         .lldd_abort_task        = hisi_sas_abort_task,
1609         .lldd_abort_task_set    = hisi_sas_abort_task_set,
1610         .lldd_clear_aca         = hisi_sas_clear_aca,
1611         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
1612         .lldd_lu_reset          = hisi_sas_lu_reset,
1613         .lldd_query_task        = hisi_sas_query_task,
1614         .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
1615         .lldd_port_formed       = hisi_sas_port_formed,
1616 };
1617
1618 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
1619 {
1620         int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1621
1622         for (i = 0; i < hisi_hba->queue_count; i++) {
1623                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1624                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1625
1626                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1627                 memset(hisi_hba->cmd_hdr[i], 0, s);
1628                 dq->wr_point = 0;
1629
1630                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1631                 memset(hisi_hba->complete_hdr[i], 0, s);
1632                 cq->rd_point = 0;
1633         }
1634
1635         s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
1636         memset(hisi_hba->initial_fis, 0, s);
1637
1638         s = max_command_entries * sizeof(struct hisi_sas_iost);
1639         memset(hisi_hba->iost, 0, s);
1640
1641         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1642         memset(hisi_hba->breakpoint, 0, s);
1643
1644         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1645         memset(hisi_hba->sata_breakpoint, 0, s);
1646 }
1647 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
1648
1649 int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1650 {
1651         struct device *dev = hisi_hba->dev;
1652         int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1653
1654         spin_lock_init(&hisi_hba->lock);
1655         for (i = 0; i < hisi_hba->n_phy; i++) {
1656                 hisi_sas_phy_init(hisi_hba, i);
1657                 hisi_hba->port[i].port_attached = 0;
1658                 hisi_hba->port[i].id = -1;
1659         }
1660
1661         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1662                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1663                 hisi_hba->devices[i].device_id = i;
1664                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1665         }
1666
1667         for (i = 0; i < hisi_hba->queue_count; i++) {
1668                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1669                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1670
1671                 /* Completion queue structure */
1672                 cq->id = i;
1673                 cq->hisi_hba = hisi_hba;
1674
1675                 /* Delivery queue structure */
1676                 spin_lock_init(&dq->lock);
1677                 dq->id = i;
1678                 dq->hisi_hba = hisi_hba;
1679
1680                 /* Delivery queue */
1681                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1682                 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1683                                         &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1684                 if (!hisi_hba->cmd_hdr[i])
1685                         goto err_out;
1686
1687                 /* Completion queue */
1688                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1689                 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1690                                 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1691                 if (!hisi_hba->complete_hdr[i])
1692                         goto err_out;
1693         }
1694
1695         s = sizeof(struct hisi_sas_slot_buf_table);
1696         hisi_hba->buffer_pool = dma_pool_create("dma_buffer", dev, s, 16, 0);
1697         if (!hisi_hba->buffer_pool)
1698                 goto err_out;
1699
1700         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1701         hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1702                                             GFP_KERNEL);
1703         if (!hisi_hba->itct)
1704                 goto err_out;
1705
1706         memset(hisi_hba->itct, 0, s);
1707
1708         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1709                                            sizeof(struct hisi_sas_slot),
1710                                            GFP_KERNEL);
1711         if (!hisi_hba->slot_info)
1712                 goto err_out;
1713
1714         s = max_command_entries * sizeof(struct hisi_sas_iost);
1715         hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1716                                             GFP_KERNEL);
1717         if (!hisi_hba->iost)
1718                 goto err_out;
1719
1720         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1721         hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1722                                 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1723         if (!hisi_hba->breakpoint)
1724                 goto err_out;
1725
1726         hisi_hba->slot_index_count = max_command_entries;
1727         s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1728         hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1729         if (!hisi_hba->slot_index_tags)
1730                 goto err_out;
1731
1732         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1733         hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1734                                 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1735         if (!hisi_hba->initial_fis)
1736                 goto err_out;
1737
1738         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1739         hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1740                                 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1741         if (!hisi_hba->sata_breakpoint)
1742                 goto err_out;
1743         hisi_sas_init_mem(hisi_hba);
1744
1745         hisi_sas_slot_index_init(hisi_hba);
1746
1747         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1748         if (!hisi_hba->wq) {
1749                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1750                 goto err_out;
1751         }
1752
1753         return 0;
1754 err_out:
1755         return -ENOMEM;
1756 }
1757 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
1758
1759 void hisi_sas_free(struct hisi_hba *hisi_hba)
1760 {
1761         struct device *dev = hisi_hba->dev;
1762         int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1763
1764         for (i = 0; i < hisi_hba->queue_count; i++) {
1765                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1766                 if (hisi_hba->cmd_hdr[i])
1767                         dma_free_coherent(dev, s,
1768                                           hisi_hba->cmd_hdr[i],
1769                                           hisi_hba->cmd_hdr_dma[i]);
1770
1771                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1772                 if (hisi_hba->complete_hdr[i])
1773                         dma_free_coherent(dev, s,
1774                                           hisi_hba->complete_hdr[i],
1775                                           hisi_hba->complete_hdr_dma[i]);
1776         }
1777
1778         dma_pool_destroy(hisi_hba->buffer_pool);
1779
1780         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1781         if (hisi_hba->itct)
1782                 dma_free_coherent(dev, s,
1783                                   hisi_hba->itct, hisi_hba->itct_dma);
1784
1785         s = max_command_entries * sizeof(struct hisi_sas_iost);
1786         if (hisi_hba->iost)
1787                 dma_free_coherent(dev, s,
1788                                   hisi_hba->iost, hisi_hba->iost_dma);
1789
1790         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1791         if (hisi_hba->breakpoint)
1792                 dma_free_coherent(dev, s,
1793                                   hisi_hba->breakpoint,
1794                                   hisi_hba->breakpoint_dma);
1795
1796
1797         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1798         if (hisi_hba->initial_fis)
1799                 dma_free_coherent(dev, s,
1800                                   hisi_hba->initial_fis,
1801                                   hisi_hba->initial_fis_dma);
1802
1803         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1804         if (hisi_hba->sata_breakpoint)
1805                 dma_free_coherent(dev, s,
1806                                   hisi_hba->sata_breakpoint,
1807                                   hisi_hba->sata_breakpoint_dma);
1808
1809         if (hisi_hba->wq)
1810                 destroy_workqueue(hisi_hba->wq);
1811 }
1812 EXPORT_SYMBOL_GPL(hisi_sas_free);
1813
1814 void hisi_sas_rst_work_handler(struct work_struct *work)
1815 {
1816         struct hisi_hba *hisi_hba =
1817                 container_of(work, struct hisi_hba, rst_work);
1818
1819         hisi_sas_controller_reset(hisi_hba);
1820 }
1821 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
1822
1823 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
1824 {
1825         struct device *dev = hisi_hba->dev;
1826         struct platform_device *pdev = hisi_hba->platform_dev;
1827         struct device_node *np = pdev ? pdev->dev.of_node : NULL;
1828         struct clk *refclk;
1829
1830         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1831                                           SAS_ADDR_SIZE)) {
1832                 dev_err(dev, "could not get property sas-addr\n");
1833                 return -ENOENT;
1834         }
1835
1836         if (np) {
1837                 /*
1838                  * These properties are only required for platform device-based
1839                  * controller with DT firmware.
1840                  */
1841                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1842                                         "hisilicon,sas-syscon");
1843                 if (IS_ERR(hisi_hba->ctrl)) {
1844                         dev_err(dev, "could not get syscon\n");
1845                         return -ENOENT;
1846                 }
1847
1848                 if (device_property_read_u32(dev, "ctrl-reset-reg",
1849                                              &hisi_hba->ctrl_reset_reg)) {
1850                         dev_err(dev,
1851                                 "could not get property ctrl-reset-reg\n");
1852                         return -ENOENT;
1853                 }
1854
1855                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1856                                              &hisi_hba->ctrl_reset_sts_reg)) {
1857                         dev_err(dev,
1858                                 "could not get property ctrl-reset-sts-reg\n");
1859                         return -ENOENT;
1860                 }
1861
1862                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1863                                              &hisi_hba->ctrl_clock_ena_reg)) {
1864                         dev_err(dev,
1865                                 "could not get property ctrl-clock-ena-reg\n");
1866                         return -ENOENT;
1867                 }
1868         }
1869
1870         refclk = devm_clk_get(dev, NULL);
1871         if (IS_ERR(refclk))
1872                 dev_dbg(dev, "no ref clk property\n");
1873         else
1874                 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
1875
1876         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
1877                 dev_err(dev, "could not get property phy-count\n");
1878                 return -ENOENT;
1879         }
1880
1881         if (device_property_read_u32(dev, "queue-count",
1882                                      &hisi_hba->queue_count)) {
1883                 dev_err(dev, "could not get property queue-count\n");
1884                 return -ENOENT;
1885         }
1886
1887         return 0;
1888 }
1889 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
1890
1891 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1892                                               const struct hisi_sas_hw *hw)
1893 {
1894         struct resource *res;
1895         struct Scsi_Host *shost;
1896         struct hisi_hba *hisi_hba;
1897         struct device *dev = &pdev->dev;
1898
1899         shost = scsi_host_alloc(hisi_sas_sht, sizeof(*hisi_hba));
1900         if (!shost) {
1901                 dev_err(dev, "scsi host alloc failed\n");
1902                 return NULL;
1903         }
1904         hisi_hba = shost_priv(shost);
1905
1906         INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
1907         hisi_hba->hw = hw;
1908         hisi_hba->dev = dev;
1909         hisi_hba->platform_dev = pdev;
1910         hisi_hba->shost = shost;
1911         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1912
1913         timer_setup(&hisi_hba->timer, NULL, 0);
1914
1915         if (hisi_sas_get_fw_info(hisi_hba) < 0)
1916                 goto err_out;
1917
1918         if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1919             dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1920                 dev_err(dev, "No usable DMA addressing method\n");
1921                 goto err_out;
1922         }
1923
1924         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1925         hisi_hba->regs = devm_ioremap_resource(dev, res);
1926         if (IS_ERR(hisi_hba->regs))
1927                 goto err_out;
1928
1929         if (hisi_sas_alloc(hisi_hba, shost)) {
1930                 hisi_sas_free(hisi_hba);
1931                 goto err_out;
1932         }
1933
1934         return shost;
1935 err_out:
1936         scsi_host_put(shost);
1937         dev_err(dev, "shost alloc failed\n");
1938         return NULL;
1939 }
1940
1941 void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1942 {
1943         int i;
1944
1945         for (i = 0; i < hisi_hba->n_phy; i++)
1946                 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1947                        hisi_hba->sas_addr,
1948                        SAS_ADDR_SIZE);
1949 }
1950 EXPORT_SYMBOL_GPL(hisi_sas_init_add);
1951
1952 int hisi_sas_probe(struct platform_device *pdev,
1953                          const struct hisi_sas_hw *hw)
1954 {
1955         struct Scsi_Host *shost;
1956         struct hisi_hba *hisi_hba;
1957         struct device *dev = &pdev->dev;
1958         struct asd_sas_phy **arr_phy;
1959         struct asd_sas_port **arr_port;
1960         struct sas_ha_struct *sha;
1961         int rc, phy_nr, port_nr, i;
1962
1963         shost = hisi_sas_shost_alloc(pdev, hw);
1964         if (!shost)
1965                 return -ENOMEM;
1966
1967         sha = SHOST_TO_SAS_HA(shost);
1968         hisi_hba = shost_priv(shost);
1969         platform_set_drvdata(pdev, sha);
1970
1971         phy_nr = port_nr = hisi_hba->n_phy;
1972
1973         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1974         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1975         if (!arr_phy || !arr_port) {
1976                 rc = -ENOMEM;
1977                 goto err_out_ha;
1978         }
1979
1980         sha->sas_phy = arr_phy;
1981         sha->sas_port = arr_port;
1982         sha->lldd_ha = hisi_hba;
1983
1984         shost->transportt = hisi_sas_stt;
1985         shost->max_id = HISI_SAS_MAX_DEVICES;
1986         shost->max_lun = ~0;
1987         shost->max_channel = 1;
1988         shost->max_cmd_len = 16;
1989         shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1990         shost->can_queue = hisi_hba->hw->max_command_entries;
1991         shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1992
1993         sha->sas_ha_name = DRV_NAME;
1994         sha->dev = hisi_hba->dev;
1995         sha->lldd_module = THIS_MODULE;
1996         sha->sas_addr = &hisi_hba->sas_addr[0];
1997         sha->num_phys = hisi_hba->n_phy;
1998         sha->core.shost = hisi_hba->shost;
1999
2000         for (i = 0; i < hisi_hba->n_phy; i++) {
2001                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2002                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2003         }
2004
2005         hisi_sas_init_add(hisi_hba);
2006
2007         rc = scsi_add_host(shost, &pdev->dev);
2008         if (rc)
2009                 goto err_out_ha;
2010
2011         rc = sas_register_ha(sha);
2012         if (rc)
2013                 goto err_out_register_ha;
2014
2015         rc = hisi_hba->hw->hw_init(hisi_hba);
2016         if (rc)
2017                 goto err_out_register_ha;
2018
2019         scsi_scan_host(shost);
2020
2021         return 0;
2022
2023 err_out_register_ha:
2024         scsi_remove_host(shost);
2025 err_out_ha:
2026         hisi_sas_free(hisi_hba);
2027         scsi_host_put(shost);
2028         return rc;
2029 }
2030 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2031
2032 int hisi_sas_remove(struct platform_device *pdev)
2033 {
2034         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2035         struct hisi_hba *hisi_hba = sha->lldd_ha;
2036         struct Scsi_Host *shost = sha->core.shost;
2037
2038         sas_unregister_ha(sha);
2039         sas_remove_host(sha->core.shost);
2040
2041         hisi_sas_free(hisi_hba);
2042         scsi_host_put(shost);
2043         return 0;
2044 }
2045 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2046
2047 static __init int hisi_sas_init(void)
2048 {
2049         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2050         if (!hisi_sas_stt)
2051                 return -ENOMEM;
2052
2053         return 0;
2054 }
2055
2056 static __exit void hisi_sas_exit(void)
2057 {
2058         sas_release_transport(hisi_sas_stt);
2059 }
2060
2061 module_init(hisi_sas_init);
2062 module_exit(hisi_sas_exit);
2063
2064 MODULE_LICENSE("GPL");
2065 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2066 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2067 MODULE_ALIAS("platform:" DRV_NAME);