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
  21 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
  22 {
  23         return device->port->ha->lldd_ha;
  24 }
  25
  26 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
  27 {
  28         void *bitmap = hisi_hba->slot_index_tags;
  29
  30         clear_bit(slot_idx, bitmap);
  31 }
  32
  33 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
  34 {
  35         hisi_sas_slot_index_clear(hisi_hba, slot_idx);
  36 }
  37
  38 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
  39 {
  40         void *bitmap = hisi_hba->slot_index_tags;
  41
  42         set_bit(slot_idx, bitmap);
  43 }
  44
  45 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
  46 {
  47         unsigned int index;
  48         void *bitmap = hisi_hba->slot_index_tags;
  49
  50         index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
  51         if (index >= hisi_hba->slot_index_count)
  52                 return -SAS_QUEUE_FULL;
  53         hisi_sas_slot_index_set(hisi_hba, index);
  54         *slot_idx = index;
  55         return 0;
  56 }
  57
  58 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
  59 {
  60         int i;
  61
  62         for (i = 0; i < hisi_hba->slot_index_count; ++i)
  63                 hisi_sas_slot_index_clear(hisi_hba, i);
  64 }
  65
  66 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
  67                              struct hisi_sas_slot *slot)
  68 {
  69         struct device *dev = &hisi_hba->pdev->dev;
  70
  71         if (!slot->task)
  72                 return;
  73
  74         if (!sas_protocol_ata(task->task_proto))
  75                 if (slot->n_elem)
  76                         dma_unmap_sg(dev, task->scatter, slot->n_elem,
  77                                      task->data_dir);
  78
  79         if (slot->command_table)
  80                 dma_pool_free(hisi_hba->command_table_pool,
  81                               slot->command_table, slot->command_table_dma);
  82
  83         if (slot->status_buffer)
  84                 dma_pool_free(hisi_hba->status_buffer_pool,
  85                               slot->status_buffer, slot->status_buffer_dma);
  86
  87         if (slot->sge_page)
  88                 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
  89                               slot->sge_page_dma);
  90
  91         list_del_init(&slot->entry);
  92         task->lldd_task = NULL;
  93         slot->task = NULL;
  94         slot->port = NULL;
  95         hisi_sas_slot_index_free(hisi_hba, slot->idx);
  96         memset(slot, 0, sizeof(*slot));
  97 }
  98 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
  99
 100 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 101                                   struct hisi_sas_slot *slot)
 102 {
 103         return hisi_hba->hw->prep_smp(hisi_hba, slot);
 104 }
 105
 106 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 107                                   struct hisi_sas_slot *slot, int is_tmf,
 108                                   struct hisi_sas_tmf_task *tmf)
 109 {
 110         return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
 111 }
 112
 113 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 114                                   struct hisi_sas_slot *slot)
 115 {
 116         return hisi_hba->hw->prep_stp(hisi_hba, slot);
 117 }
 118
 119 /*
 120  * This function will issue an abort TMF regardless of whether the
 121  * task is in the sdev or not. Then it will do the task complete
 122  * cleanup and callbacks.
 123  */
 124 static void hisi_sas_slot_abort(struct work_struct *work)
 125 {
 126         struct hisi_sas_slot *abort_slot =
 127                 container_of(work, struct hisi_sas_slot, abort_slot);
 128         struct sas_task *task = abort_slot->task;
 129         struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
 130         struct scsi_cmnd *cmnd = task->uldd_task;
 131         struct hisi_sas_tmf_task tmf_task;
 132         struct domain_device *device = task->dev;
 133         struct hisi_sas_device *sas_dev = device->lldd_dev;
 134         struct scsi_lun lun;
 135         struct device *dev = &hisi_hba->pdev->dev;
 136         int tag = abort_slot->idx;
 137
 138         if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
 139                 dev_err(dev, "cannot abort slot for non-ssp task\n");
 140                 goto out;
 141         }
 142
 143         int_to_scsilun(cmnd->device->lun, &lun);
 144         tmf_task.tmf = TMF_ABORT_TASK;
 145         tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
 146
 147         hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
 148 out:
 149         /* Do cleanup for this task */
 150         hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
 151         if (task->task_done)
 152                 task->task_done(task);
 153         if (sas_dev && sas_dev->running_req)
 154                 sas_dev->running_req--;
 155 }
 156
 157 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba,
 158                               int is_tmf, struct hisi_sas_tmf_task *tmf,
 159                               int *pass)
 160 {
 161         struct domain_device *device = task->dev;
 162         struct hisi_sas_device *sas_dev = device->lldd_dev;
 163         struct hisi_sas_port *port;
 164         struct hisi_sas_slot *slot;
 165         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 166         struct device *dev = &hisi_hba->pdev->dev;
 167         int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
 168
 169         if (!device->port) {
 170                 struct task_status_struct *ts = &task->task_status;
 171
 172                 ts->resp = SAS_TASK_UNDELIVERED;
 173                 ts->stat = SAS_PHY_DOWN;
 174                 /*
 175                  * libsas will use dev->port, should
 176                  * not call task_done for sata
 177                  */
 178                 if (device->dev_type != SAS_SATA_DEV)
 179                         task->task_done(task);
 180                 return 0;
 181         }
 182
 183         if (DEV_IS_GONE(sas_dev)) {
 184                 if (sas_dev)
 185                         dev_info(dev, "task prep: device %llu not ready\n",
 186                                  sas_dev->device_id);
 187                 else
 188                         dev_info(dev, "task prep: device %016llx not ready\n",
 189                                  SAS_ADDR(device->sas_addr));
 190
 191                 rc = SAS_PHY_DOWN;
 192                 return rc;
 193         }
 194         port = device->port->lldd_port;
 195         if (port && !port->port_attached && !tmf) {
 196                 if (sas_protocol_ata(task->task_proto)) {
 197                         struct task_status_struct *ts = &task->task_status;
 198
 199                         dev_info(dev,
 200                                  "task prep: SATA/STP port%d not attach device\n",
 201                                  device->port->id);
 202                         ts->resp = SAS_TASK_COMPLETE;
 203                         ts->stat = SAS_PHY_DOWN;
 204                         task->task_done(task);
 205                 } else {
 206                         struct task_status_struct *ts = &task->task_status;
 207
 208                         dev_info(dev,
 209                                  "task prep: SAS port%d does not attach device\n",
 210                                  device->port->id);
 211                         ts->resp = SAS_TASK_UNDELIVERED;
 212                         ts->stat = SAS_PHY_DOWN;
 213                         task->task_done(task);
 214                 }
 215                 return 0;
 216         }
 217
 218         if (!sas_protocol_ata(task->task_proto)) {
 219                 if (task->num_scatter) {
 220                         n_elem = dma_map_sg(dev, task->scatter,
 221                                             task->num_scatter, task->data_dir);
 222                         if (!n_elem) {
 223                                 rc = -ENOMEM;
 224                                 goto prep_out;
 225                         }
 226                 }
 227         } else
 228                 n_elem = task->num_scatter;
 229
 230         if (hisi_hba->hw->slot_index_alloc)
 231                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
 232                                                     device);
 233         else
 234                 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
 235         if (rc)
 236                 goto err_out;
 237         rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue,
 238                                          &dlvry_queue_slot);
 239         if (rc)
 240                 goto err_out_tag;
 241
 242         slot = &hisi_hba->slot_info[slot_idx];
 243         memset(slot, 0, sizeof(struct hisi_sas_slot));
 244
 245         slot->idx = slot_idx;
 246         slot->n_elem = n_elem;
 247         slot->dlvry_queue = dlvry_queue;
 248         slot->dlvry_queue_slot = dlvry_queue_slot;
 249         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 250         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 251         slot->task = task;
 252         slot->port = port;
 253         task->lldd_task = slot;
 254         INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
 255
 256         slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool,
 257                                              GFP_ATOMIC,
 258                                              &slot->status_buffer_dma);
 259         if (!slot->status_buffer) {
 260                 rc = -ENOMEM;
 261                 goto err_out_slot_buf;
 262         }
 263         memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ);
 264
 265         slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool,
 266                                              GFP_ATOMIC,
 267                                              &slot->command_table_dma);
 268         if (!slot->command_table) {
 269                 rc = -ENOMEM;
 270                 goto err_out_status_buf;
 271         }
 272         memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ);
 273         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 274
 275         switch (task->task_proto) {
 276         case SAS_PROTOCOL_SMP:
 277                 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
 278                 break;
 279         case SAS_PROTOCOL_SSP:
 280                 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
 281                 break;
 282         case SAS_PROTOCOL_SATA:
 283         case SAS_PROTOCOL_STP:
 284         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 285                 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
 286                 break;
 287         default:
 288                 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
 289                         task->task_proto);
 290                 rc = -EINVAL;
 291                 break;
 292         }
 293
 294         if (rc) {
 295                 dev_err(dev, "task prep: rc = 0x%x\n", rc);
 296                 if (slot->sge_page)
 297                         goto err_out_sge;
 298                 goto err_out_command_table;
 299         }
 300
 301         list_add_tail(&slot->entry, &port->list);
 302         spin_lock(&task->task_state_lock);
 303         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 304         spin_unlock(&task->task_state_lock);
 305
 306         hisi_hba->slot_prep = slot;
 307
 308         sas_dev->running_req++;
 309         ++(*pass);
 310
 311         return 0;
 312
 313 err_out_sge:
 314         dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
 315                 slot->sge_page_dma);
 316 err_out_command_table:
 317         dma_pool_free(hisi_hba->command_table_pool, slot->command_table,
 318                 slot->command_table_dma);
 319 err_out_status_buf:
 320         dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer,
 321                 slot->status_buffer_dma);
 322 err_out_slot_buf:
 323         /* Nothing to be done */
 324 err_out_tag:
 325         hisi_sas_slot_index_free(hisi_hba, slot_idx);
 326 err_out:
 327         dev_err(dev, "task prep: failed[%d]!\n", rc);
 328         if (!sas_protocol_ata(task->task_proto))
 329                 if (n_elem)
 330                         dma_unmap_sg(dev, task->scatter, n_elem,
 331                                      task->data_dir);
 332 prep_out:
 333         return rc;
 334 }
 335
 336 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
 337                               int is_tmf, struct hisi_sas_tmf_task *tmf)
 338 {
 339         u32 rc;
 340         u32 pass = 0;
 341         unsigned long flags;
 342         struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
 343         struct device *dev = &hisi_hba->pdev->dev;
 344
 345         /* protect task_prep and start_delivery sequence */
 346         spin_lock_irqsave(&hisi_hba->lock, flags);
 347         rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass);
 348         if (rc)
 349                 dev_err(dev, "task exec: failed[%d]!\n", rc);
 350
 351         if (likely(pass))
 352                 hisi_hba->hw->start_delivery(hisi_hba);
 353         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 354
 355         return rc;
 356 }
 357
 358 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
 359 {
 360         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 361         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 362         struct sas_ha_struct *sas_ha;
 363
 364         if (!phy->phy_attached)
 365                 return;
 366
 367         sas_ha = &hisi_hba->sha;
 368         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
 369
 370         if (sas_phy->phy) {
 371                 struct sas_phy *sphy = sas_phy->phy;
 372
 373                 sphy->negotiated_linkrate = sas_phy->linkrate;
 374                 sphy->minimum_linkrate = phy->minimum_linkrate;
 375                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 376                 sphy->maximum_linkrate = phy->maximum_linkrate;
 377         }
 378
 379         if (phy->phy_type & PORT_TYPE_SAS) {
 380                 struct sas_identify_frame *id;
 381
 382                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 383                 id->dev_type = phy->identify.device_type;
 384                 id->initiator_bits = SAS_PROTOCOL_ALL;
 385                 id->target_bits = phy->identify.target_port_protocols;
 386         } else if (phy->phy_type & PORT_TYPE_SATA) {
 387                 /*Nothing*/
 388         }
 389
 390         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 391         sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
 392 }
 393
 394 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 395 {
 396         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 397         struct hisi_sas_device *sas_dev = NULL;
 398         int i;
 399
 400         spin_lock(&hisi_hba->lock);
 401         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
 402                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 403                         hisi_hba->devices[i].device_id = i;
 404                         sas_dev = &hisi_hba->devices[i];
 405                         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 406                         sas_dev->dev_type = device->dev_type;
 407                         sas_dev->hisi_hba = hisi_hba;
 408                         sas_dev->sas_device = device;
 409                         break;
 410                 }
 411         }
 412         spin_unlock(&hisi_hba->lock);
 413
 414         return sas_dev;
 415 }
 416
 417 static int hisi_sas_dev_found(struct domain_device *device)
 418 {
 419         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 420         struct domain_device *parent_dev = device->parent;
 421         struct hisi_sas_device *sas_dev;
 422         struct device *dev = &hisi_hba->pdev->dev;
 423
 424         if (hisi_hba->hw->alloc_dev)
 425                 sas_dev = hisi_hba->hw->alloc_dev(device);
 426         else
 427                 sas_dev = hisi_sas_alloc_dev(device);
 428         if (!sas_dev) {
 429                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 430                         HISI_SAS_MAX_DEVICES);
 431                 return -EINVAL;
 432         }
 433
 434         device->lldd_dev = sas_dev;
 435         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 436
 437         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 438                 int phy_no;
 439                 u8 phy_num = parent_dev->ex_dev.num_phys;
 440                 struct ex_phy *phy;
 441
 442                 for (phy_no = 0; phy_no < phy_num; phy_no++) {
 443                         phy = &parent_dev->ex_dev.ex_phy[phy_no];
 444                         if (SAS_ADDR(phy->attached_sas_addr) ==
 445                                 SAS_ADDR(device->sas_addr)) {
 446                                 sas_dev->attached_phy = phy_no;
 447                                 break;
 448                         }
 449                 }
 450
 451                 if (phy_no == phy_num) {
 452                         dev_info(dev, "dev found: no attached "
 453                                  "dev:%016llx at ex:%016llx\n",
 454                                  SAS_ADDR(device->sas_addr),
 455                                  SAS_ADDR(parent_dev->sas_addr));
 456                         return -EINVAL;
 457                 }
 458         }
 459
 460         return 0;
 461 }
 462
 463 static int hisi_sas_slave_configure(struct scsi_device *sdev)
 464 {
 465         struct domain_device *dev = sdev_to_domain_dev(sdev);
 466         int ret = sas_slave_configure(sdev);
 467
 468         if (ret)
 469                 return ret;
 470         if (!dev_is_sata(dev))
 471                 sas_change_queue_depth(sdev, 64);
 472
 473         return 0;
 474 }
 475
 476 static void hisi_sas_scan_start(struct Scsi_Host *shost)
 477 {
 478         struct hisi_hba *hisi_hba = shost_priv(shost);
 479         int i;
 480
 481         for (i = 0; i < hisi_hba->n_phy; ++i)
 482                 hisi_sas_bytes_dmaed(hisi_hba, i);
 483
 484         hisi_hba->scan_finished = 1;
 485 }
 486
 487 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 488 {
 489         struct hisi_hba *hisi_hba = shost_priv(shost);
 490         struct sas_ha_struct *sha = &hisi_hba->sha;
 491
 492         if (hisi_hba->scan_finished == 0)
 493                 return 0;
 494
 495         sas_drain_work(sha);
 496         return 1;
 497 }
 498
 499 static void hisi_sas_phyup_work(struct work_struct *work)
 500 {
 501         struct hisi_sas_phy *phy =
 502                 container_of(work, struct hisi_sas_phy, phyup_ws);
 503         struct hisi_hba *hisi_hba = phy->hisi_hba;
 504         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 505         int phy_no = sas_phy->id;
 506
 507         hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
 508         hisi_sas_bytes_dmaed(hisi_hba, phy_no);
 509 }
 510
 511 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
 512 {
 513         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 514         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 515
 516         phy->hisi_hba = hisi_hba;
 517         phy->port = NULL;
 518         init_timer(&phy->timer);
 519         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 520         sas_phy->class = SAS;
 521         sas_phy->iproto = SAS_PROTOCOL_ALL;
 522         sas_phy->tproto = 0;
 523         sas_phy->type = PHY_TYPE_PHYSICAL;
 524         sas_phy->role = PHY_ROLE_INITIATOR;
 525         sas_phy->oob_mode = OOB_NOT_CONNECTED;
 526         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 527         sas_phy->id = phy_no;
 528         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
 529         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
 530         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
 531         sas_phy->lldd_phy = phy;
 532
 533         INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
 534 }
 535
 536 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
 537 {
 538         struct sas_ha_struct *sas_ha = sas_phy->ha;
 539         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 540         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 541         struct asd_sas_port *sas_port = sas_phy->port;
 542         struct hisi_sas_port *port = &hisi_hba->port[sas_phy->id];
 543         unsigned long flags;
 544
 545         if (!sas_port)
 546                 return;
 547
 548         spin_lock_irqsave(&hisi_hba->lock, flags);
 549         port->port_attached = 1;
 550         port->id = phy->port_id;
 551         phy->port = port;
 552         sas_port->lldd_port = port;
 553         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 554 }
 555
 556 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, int phy_no,
 557                                      struct domain_device *device)
 558 {
 559         struct hisi_sas_phy *phy;
 560         struct hisi_sas_port *port;
 561         struct hisi_sas_slot *slot, *slot2;
 562         struct device *dev = &hisi_hba->pdev->dev;
 563
 564         phy = &hisi_hba->phy[phy_no];
 565         port = phy->port;
 566         if (!port)
 567                 return;
 568
 569         list_for_each_entry_safe(slot, slot2, &port->list, entry) {
 570                 struct sas_task *task;
 571
 572                 task = slot->task;
 573                 if (device && task->dev != device)
 574                         continue;
 575
 576                 dev_info(dev, "Release slot [%d:%d], task [%p]:\n",
 577                          slot->dlvry_queue, slot->dlvry_queue_slot, task);
 578                 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
 579         }
 580 }
 581
 582 static void hisi_sas_port_notify_deformed(struct asd_sas_phy *sas_phy)
 583 {
 584         struct domain_device *device;
 585         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 586         struct asd_sas_port *sas_port = sas_phy->port;
 587
 588         list_for_each_entry(device, &sas_port->dev_list, dev_list_node)
 589                 hisi_sas_do_release_task(phy->hisi_hba, sas_phy->id, device);
 590 }
 591
 592 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
 593                         struct domain_device *device)
 594 {
 595         struct asd_sas_port *port = device->port;
 596         struct asd_sas_phy *sas_phy;
 597
 598         list_for_each_entry(sas_phy, &port->phy_list, port_phy_el)
 599                 hisi_sas_do_release_task(hisi_hba, sas_phy->id, device);
 600 }
 601
 602 static void hisi_sas_dev_gone(struct domain_device *device)
 603 {
 604         struct hisi_sas_device *sas_dev = device->lldd_dev;
 605         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 606         struct device *dev = &hisi_hba->pdev->dev;
 607         u64 dev_id = sas_dev->device_id;
 608
 609         dev_info(dev, "found dev[%lld:%x] is gone\n",
 610                  sas_dev->device_id, sas_dev->dev_type);
 611
 612         hisi_hba->hw->free_device(hisi_hba, sas_dev);
 613         device->lldd_dev = NULL;
 614         memset(sas_dev, 0, sizeof(*sas_dev));
 615         sas_dev->device_id = dev_id;
 616         sas_dev->dev_type = SAS_PHY_UNUSED;
 617         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 618 }
 619
 620 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
 621 {
 622         return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
 623 }
 624
 625 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
 626                                 void *funcdata)
 627 {
 628         struct sas_ha_struct *sas_ha = sas_phy->ha;
 629         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 630         int phy_no = sas_phy->id;
 631
 632         switch (func) {
 633         case PHY_FUNC_HARD_RESET:
 634                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
 635                 break;
 636
 637         case PHY_FUNC_LINK_RESET:
 638                 hisi_hba->hw->phy_enable(hisi_hba, phy_no);
 639                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
 640                 break;
 641
 642         case PHY_FUNC_DISABLE:
 643                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 644                 break;
 645
 646         case PHY_FUNC_SET_LINK_RATE:
 647         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 648         default:
 649                 return -EOPNOTSUPP;
 650         }
 651         return 0;
 652 }
 653
 654 static void hisi_sas_task_done(struct sas_task *task)
 655 {
 656         if (!del_timer(&task->slow_task->timer))
 657                 return;
 658         complete(&task->slow_task->completion);
 659 }
 660
 661 static void hisi_sas_tmf_timedout(unsigned long data)
 662 {
 663         struct sas_task *task = (struct sas_task *)data;
 664
 665         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 666         complete(&task->slow_task->completion);
 667 }
 668
 669 #define TASK_TIMEOUT 20
 670 #define TASK_RETRY 3
 671 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
 672                                            void *parameter, u32 para_len,
 673                                            struct hisi_sas_tmf_task *tmf)
 674 {
 675         struct hisi_sas_device *sas_dev = device->lldd_dev;
 676         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
 677         struct device *dev = &hisi_hba->pdev->dev;
 678         struct sas_task *task;
 679         int res, retry;
 680
 681         for (retry = 0; retry < TASK_RETRY; retry++) {
 682                 task = sas_alloc_slow_task(GFP_KERNEL);
 683                 if (!task)
 684                         return -ENOMEM;
 685
 686                 task->dev = device;
 687                 task->task_proto = device->tproto;
 688
 689                 memcpy(&task->ssp_task, parameter, para_len);
 690                 task->task_done = hisi_sas_task_done;
 691
 692                 task->slow_task->timer.data = (unsigned long) task;
 693                 task->slow_task->timer.function = hisi_sas_tmf_timedout;
 694                 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
 695                 add_timer(&task->slow_task->timer);
 696
 697                 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
 698
 699                 if (res) {
 700                         del_timer(&task->slow_task->timer);
 701                         dev_err(dev, "abort tmf: executing internal task failed: %d\n",
 702                                 res);
 703                         goto ex_err;
 704                 }
 705
 706                 wait_for_completion(&task->slow_task->completion);
 707                 res = TMF_RESP_FUNC_FAILED;
 708                 /* Even TMF timed out, return direct. */
 709                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 710                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 711                                 dev_err(dev, "abort tmf: TMF task[%d] timeout\n",
 712                                         tmf->tag_of_task_to_be_managed);
 713                                 if (task->lldd_task) {
 714                                         struct hisi_sas_slot *slot =
 715                                                 task->lldd_task;
 716
 717                                         hisi_sas_slot_task_free(hisi_hba,
 718                                                                 task, slot);
 719                                 }
 720
 721                                 goto ex_err;
 722                         }
 723                 }
 724
 725                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 726                      task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
 727                         res = TMF_RESP_FUNC_COMPLETE;
 728                         break;
 729                 }
 730
 731                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 732                       task->task_status.stat == SAS_DATA_UNDERRUN) {
 733                         /* no error, but return the number of bytes of
 734                          * underrun
 735                          */
 736                         dev_warn(dev, "abort tmf: task to dev %016llx "
 737                                  "resp: 0x%x sts 0x%x underrun\n",
 738                                  SAS_ADDR(device->sas_addr),
 739                                  task->task_status.resp,
 740                                  task->task_status.stat);
 741                         res = task->task_status.residual;
 742                         break;
 743                 }
 744
 745                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 746                         task->task_status.stat == SAS_DATA_OVERRUN) {
 747                         dev_warn(dev, "abort tmf: blocked task error\n");
 748                         res = -EMSGSIZE;
 749                         break;
 750                 }
 751
 752                 dev_warn(dev, "abort tmf: task to dev "
 753                          "%016llx resp: 0x%x status 0x%x\n",
 754                          SAS_ADDR(device->sas_addr), task->task_status.resp,
 755                          task->task_status.stat);
 756                 sas_free_task(task);
 757                 task = NULL;
 758         }
 759 ex_err:
 760         WARN_ON(retry == TASK_RETRY);
 761         sas_free_task(task);
 762         return res;
 763 }
 764
 765 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
 766                                 u8 *lun, struct hisi_sas_tmf_task *tmf)
 767 {
 768         struct sas_ssp_task ssp_task;
 769
 770         if (!(device->tproto & SAS_PROTOCOL_SSP))
 771                 return TMF_RESP_FUNC_ESUPP;
 772
 773         memcpy(ssp_task.LUN, lun, 8);
 774
 775         return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
 776                                 sizeof(ssp_task), tmf);
 777 }
 778
 779 static int hisi_sas_abort_task(struct sas_task *task)
 780 {
 781         struct scsi_lun lun;
 782         struct hisi_sas_tmf_task tmf_task;
 783         struct domain_device *device = task->dev;
 784         struct hisi_sas_device *sas_dev = device->lldd_dev;
 785         struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
 786         struct device *dev = &hisi_hba->pdev->dev;
 787         int rc = TMF_RESP_FUNC_FAILED;
 788         unsigned long flags;
 789
 790         if (!sas_dev) {
 791                 dev_warn(dev, "Device has been removed\n");
 792                 return TMF_RESP_FUNC_FAILED;
 793         }
 794
 795         spin_lock_irqsave(&task->task_state_lock, flags);
 796         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
 797                 spin_unlock_irqrestore(&task->task_state_lock, flags);
 798                 rc = TMF_RESP_FUNC_COMPLETE;
 799                 goto out;
 800         }
 801
 802         spin_unlock_irqrestore(&task->task_state_lock, flags);
 803         sas_dev->dev_status = HISI_SAS_DEV_EH;
 804         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
 805                 struct scsi_cmnd *cmnd = task->uldd_task;
 806                 struct hisi_sas_slot *slot = task->lldd_task;
 807                 u32 tag = slot->idx;
 808
 809                 int_to_scsilun(cmnd->device->lun, &lun);
 810                 tmf_task.tmf = TMF_ABORT_TASK;
 811                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
 812
 813                 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
 814                                                   &tmf_task);
 815
 816                 /* if successful, clear the task and callback forwards.*/
 817                 if (rc == TMF_RESP_FUNC_COMPLETE) {
 818                         if (task->lldd_task) {
 819                                 struct hisi_sas_slot *slot;
 820
 821                                 slot = &hisi_hba->slot_info
 822                                         [tmf_task.tag_of_task_to_be_managed];
 823                                 spin_lock_irqsave(&hisi_hba->lock, flags);
 824                                 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
 825                                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
 826                         }
 827                 }
 828
 829         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
 830                 task->task_proto & SAS_PROTOCOL_STP) {
 831                 if (task->dev->dev_type == SAS_SATA_DEV) {
 832                         struct hisi_slot_info *slot = task->lldd_task;
 833
 834                         dev_notice(dev, "abort task: hba=%p task=%p slot=%p\n",
 835                                    hisi_hba, task, slot);
 836                         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 837                         rc = TMF_RESP_FUNC_COMPLETE;
 838                         goto out;
 839                 }
 840
 841         }
 842
 843 out:
 844         if (rc != TMF_RESP_FUNC_COMPLETE)
 845                 dev_notice(dev, "abort task: rc=%d\n", rc);
 846         return rc;
 847 }
 848
 849 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
 850 {
 851         struct hisi_sas_tmf_task tmf_task;
 852         int rc = TMF_RESP_FUNC_FAILED;
 853
 854         tmf_task.tmf = TMF_ABORT_TASK_SET;
 855         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
 856
 857         return rc;
 858 }
 859
 860 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
 861 {
 862         int rc = TMF_RESP_FUNC_FAILED;
 863         struct hisi_sas_tmf_task tmf_task;
 864
 865         tmf_task.tmf = TMF_CLEAR_ACA;
 866         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
 867
 868         return rc;
 869 }
 870
 871 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
 872 {
 873         struct sas_phy *phy = sas_get_local_phy(device);
 874         int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
 875                         (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
 876         rc = sas_phy_reset(phy, reset_type);
 877         sas_put_local_phy(phy);
 878         msleep(2000);
 879         return rc;
 880 }
 881
 882 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
 883 {
 884         struct hisi_sas_device *sas_dev = device->lldd_dev;
 885         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 886         unsigned long flags;
 887         int rc = TMF_RESP_FUNC_FAILED;
 888
 889         if (sas_dev->dev_status != HISI_SAS_DEV_EH)
 890                 return TMF_RESP_FUNC_FAILED;
 891         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 892
 893         rc = hisi_sas_debug_I_T_nexus_reset(device);
 894
 895         spin_lock_irqsave(&hisi_hba->lock, flags);
 896         hisi_sas_release_task(hisi_hba, device);
 897         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 898
 899         return 0;
 900 }
 901
 902 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
 903 {
 904         struct hisi_sas_tmf_task tmf_task;
 905         struct hisi_sas_device *sas_dev = device->lldd_dev;
 906         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 907         struct device *dev = &hisi_hba->pdev->dev;
 908         unsigned long flags;
 909         int rc = TMF_RESP_FUNC_FAILED;
 910
 911         tmf_task.tmf = TMF_LU_RESET;
 912         sas_dev->dev_status = HISI_SAS_DEV_EH;
 913         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
 914         if (rc == TMF_RESP_FUNC_COMPLETE) {
 915                 spin_lock_irqsave(&hisi_hba->lock, flags);
 916                 hisi_sas_release_task(hisi_hba, device);
 917                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
 918         }
 919
 920         /* If failed, fall-through I_T_Nexus reset */
 921         dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n",
 922                 sas_dev->device_id, rc);
 923         return rc;
 924 }
 925
 926 static int hisi_sas_query_task(struct sas_task *task)
 927 {
 928         struct scsi_lun lun;
 929         struct hisi_sas_tmf_task tmf_task;
 930         int rc = TMF_RESP_FUNC_FAILED;
 931
 932         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
 933                 struct scsi_cmnd *cmnd = task->uldd_task;
 934                 struct domain_device *device = task->dev;
 935                 struct hisi_sas_slot *slot = task->lldd_task;
 936                 u32 tag = slot->idx;
 937
 938                 int_to_scsilun(cmnd->device->lun, &lun);
 939                 tmf_task.tmf = TMF_QUERY_TASK;
 940                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
 941
 942                 rc = hisi_sas_debug_issue_ssp_tmf(device,
 943                                                   lun.scsi_lun,
 944                                                   &tmf_task);
 945                 switch (rc) {
 946                 /* The task is still in Lun, release it then */
 947                 case TMF_RESP_FUNC_SUCC:
 948                 /* The task is not in Lun or failed, reset the phy */
 949                 case TMF_RESP_FUNC_FAILED:
 950                 case TMF_RESP_FUNC_COMPLETE:
 951                         break;
 952                 }
 953         }
 954         return rc;
 955 }
 956
 957 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
 958 {
 959         hisi_sas_port_notify_formed(sas_phy);
 960 }
 961
 962 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
 963 {
 964         hisi_sas_port_notify_deformed(sas_phy);
 965 }
 966
 967 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
 968 {
 969         phy->phy_attached = 0;
 970         phy->phy_type = 0;
 971         phy->port = NULL;
 972 }
 973
 974 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
 975 {
 976         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 977         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 978         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
 979
 980         if (rdy) {
 981                 /* Phy down but ready */
 982                 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
 983                 hisi_sas_port_notify_formed(sas_phy);
 984         } else {
 985                 struct hisi_sas_port *port  = phy->port;
 986
 987                 /* Phy down and not ready */
 988                 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
 989                 sas_phy_disconnected(sas_phy);
 990
 991                 if (port) {
 992                         if (phy->phy_type & PORT_TYPE_SAS) {
 993                                 int port_id = port->id;
 994
 995                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
 996                                                                        port_id))
 997                                         port->port_attached = 0;
 998                         } else if (phy->phy_type & PORT_TYPE_SATA)
 999                                 port->port_attached = 0;
1000                 }
1001                 hisi_sas_phy_disconnected(phy);
1002         }
1003 }
1004 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1005
1006 static struct scsi_transport_template *hisi_sas_stt;
1007
1008 static struct scsi_host_template hisi_sas_sht = {
1009         .module                 = THIS_MODULE,
1010         .name                   = DRV_NAME,
1011         .queuecommand           = sas_queuecommand,
1012         .target_alloc           = sas_target_alloc,
1013         .slave_configure        = hisi_sas_slave_configure,
1014         .scan_finished          = hisi_sas_scan_finished,
1015         .scan_start             = hisi_sas_scan_start,
1016         .change_queue_depth     = sas_change_queue_depth,
1017         .bios_param             = sas_bios_param,
1018         .can_queue              = 1,
1019         .this_id                = -1,
1020         .sg_tablesize           = SG_ALL,
1021         .max_sectors            = SCSI_DEFAULT_MAX_SECTORS,
1022         .use_clustering         = ENABLE_CLUSTERING,
1023         .eh_device_reset_handler = sas_eh_device_reset_handler,
1024         .eh_bus_reset_handler   = sas_eh_bus_reset_handler,
1025         .target_destroy         = sas_target_destroy,
1026         .ioctl                  = sas_ioctl,
1027 };
1028
1029 static struct sas_domain_function_template hisi_sas_transport_ops = {
1030         .lldd_dev_found         = hisi_sas_dev_found,
1031         .lldd_dev_gone          = hisi_sas_dev_gone,
1032         .lldd_execute_task      = hisi_sas_queue_command,
1033         .lldd_control_phy       = hisi_sas_control_phy,
1034         .lldd_abort_task        = hisi_sas_abort_task,
1035         .lldd_abort_task_set    = hisi_sas_abort_task_set,
1036         .lldd_clear_aca         = hisi_sas_clear_aca,
1037         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
1038         .lldd_lu_reset          = hisi_sas_lu_reset,
1039         .lldd_query_task        = hisi_sas_query_task,
1040         .lldd_port_formed       = hisi_sas_port_formed,
1041         .lldd_port_deformed     = hisi_sas_port_deformed,
1042 };
1043
1044 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1045 {
1046         struct platform_device *pdev = hisi_hba->pdev;
1047         struct device *dev = &pdev->dev;
1048         int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1049
1050         spin_lock_init(&hisi_hba->lock);
1051         for (i = 0; i < hisi_hba->n_phy; i++) {
1052                 hisi_sas_phy_init(hisi_hba, i);
1053                 hisi_hba->port[i].port_attached = 0;
1054                 hisi_hba->port[i].id = -1;
1055                 INIT_LIST_HEAD(&hisi_hba->port[i].list);
1056         }
1057
1058         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1059                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1060                 hisi_hba->devices[i].device_id = i;
1061                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1062         }
1063
1064         for (i = 0; i < hisi_hba->queue_count; i++) {
1065                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1066
1067                 /* Completion queue structure */
1068                 cq->id = i;
1069                 cq->hisi_hba = hisi_hba;
1070
1071                 /* Delivery queue */
1072                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1073                 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1074                                         &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1075                 if (!hisi_hba->cmd_hdr[i])
1076                         goto err_out;
1077                 memset(hisi_hba->cmd_hdr[i], 0, s);
1078
1079                 /* Completion queue */
1080                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1081                 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1082                                 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1083                 if (!hisi_hba->complete_hdr[i])
1084                         goto err_out;
1085                 memset(hisi_hba->complete_hdr[i], 0, s);
1086         }
1087
1088         s = HISI_SAS_STATUS_BUF_SZ;
1089         hisi_hba->status_buffer_pool = dma_pool_create("status_buffer",
1090                                                        dev, s, 16, 0);
1091         if (!hisi_hba->status_buffer_pool)
1092                 goto err_out;
1093
1094         s = HISI_SAS_COMMAND_TABLE_SZ;
1095         hisi_hba->command_table_pool = dma_pool_create("command_table",
1096                                                        dev, s, 16, 0);
1097         if (!hisi_hba->command_table_pool)
1098                 goto err_out;
1099
1100         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1101         hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1102                                             GFP_KERNEL);
1103         if (!hisi_hba->itct)
1104                 goto err_out;
1105
1106         memset(hisi_hba->itct, 0, s);
1107
1108         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1109                                            sizeof(struct hisi_sas_slot),
1110                                            GFP_KERNEL);
1111         if (!hisi_hba->slot_info)
1112                 goto err_out;
1113
1114         s = max_command_entries * sizeof(struct hisi_sas_iost);
1115         hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1116                                             GFP_KERNEL);
1117         if (!hisi_hba->iost)
1118                 goto err_out;
1119
1120         memset(hisi_hba->iost, 0, s);
1121
1122         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1123         hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1124                                 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1125         if (!hisi_hba->breakpoint)
1126                 goto err_out;
1127
1128         memset(hisi_hba->breakpoint, 0, s);
1129
1130         hisi_hba->slot_index_count = max_command_entries;
1131         s = hisi_hba->slot_index_count / sizeof(unsigned long);
1132         hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1133         if (!hisi_hba->slot_index_tags)
1134                 goto err_out;
1135
1136         hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
1137                                 sizeof(struct hisi_sas_sge_page), 16, 0);
1138         if (!hisi_hba->sge_page_pool)
1139                 goto err_out;
1140
1141         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1142         hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1143                                 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1144         if (!hisi_hba->initial_fis)
1145                 goto err_out;
1146         memset(hisi_hba->initial_fis, 0, s);
1147
1148         s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1149         hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1150                                 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1151         if (!hisi_hba->sata_breakpoint)
1152                 goto err_out;
1153         memset(hisi_hba->sata_breakpoint, 0, s);
1154
1155         hisi_sas_slot_index_init(hisi_hba);
1156
1157         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1158         if (!hisi_hba->wq) {
1159                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1160                 goto err_out;
1161         }
1162
1163         return 0;
1164 err_out:
1165         return -ENOMEM;
1166 }
1167
1168 static void hisi_sas_free(struct hisi_hba *hisi_hba)
1169 {
1170         struct device *dev = &hisi_hba->pdev->dev;
1171         int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1172
1173         for (i = 0; i < hisi_hba->queue_count; i++) {
1174                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1175                 if (hisi_hba->cmd_hdr[i])
1176                         dma_free_coherent(dev, s,
1177                                           hisi_hba->cmd_hdr[i],
1178                                           hisi_hba->cmd_hdr_dma[i]);
1179
1180                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1181                 if (hisi_hba->complete_hdr[i])
1182                         dma_free_coherent(dev, s,
1183                                           hisi_hba->complete_hdr[i],
1184                                           hisi_hba->complete_hdr_dma[i]);
1185         }
1186
1187         dma_pool_destroy(hisi_hba->status_buffer_pool);
1188         dma_pool_destroy(hisi_hba->command_table_pool);
1189         dma_pool_destroy(hisi_hba->sge_page_pool);
1190
1191         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1192         if (hisi_hba->itct)
1193                 dma_free_coherent(dev, s,
1194                                   hisi_hba->itct, hisi_hba->itct_dma);
1195
1196         s = max_command_entries * sizeof(struct hisi_sas_iost);
1197         if (hisi_hba->iost)
1198                 dma_free_coherent(dev, s,
1199                                   hisi_hba->iost, hisi_hba->iost_dma);
1200
1201         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1202         if (hisi_hba->breakpoint)
1203                 dma_free_coherent(dev, s,
1204                                   hisi_hba->breakpoint,
1205                                   hisi_hba->breakpoint_dma);
1206
1207
1208         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1209         if (hisi_hba->initial_fis)
1210                 dma_free_coherent(dev, s,
1211                                   hisi_hba->initial_fis,
1212                                   hisi_hba->initial_fis_dma);
1213
1214         s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1215         if (hisi_hba->sata_breakpoint)
1216                 dma_free_coherent(dev, s,
1217                                   hisi_hba->sata_breakpoint,
1218                                   hisi_hba->sata_breakpoint_dma);
1219
1220         if (hisi_hba->wq)
1221                 destroy_workqueue(hisi_hba->wq);
1222 }
1223
1224 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1225                                               const struct hisi_sas_hw *hw)
1226 {
1227         struct resource *res;
1228         struct Scsi_Host *shost;
1229         struct hisi_hba *hisi_hba;
1230         struct device *dev = &pdev->dev;
1231         struct device_node *np = pdev->dev.of_node;
1232
1233         shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
1234         if (!shost)
1235                 goto err_out;
1236         hisi_hba = shost_priv(shost);
1237
1238         hisi_hba->hw = hw;
1239         hisi_hba->pdev = pdev;
1240         hisi_hba->shost = shost;
1241         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1242
1243         init_timer(&hisi_hba->timer);
1244
1245         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1246                                           SAS_ADDR_SIZE))
1247                 goto err_out;
1248
1249         if (np) {
1250                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1251                                         "hisilicon,sas-syscon");
1252                 if (IS_ERR(hisi_hba->ctrl))
1253                         goto err_out;
1254
1255                 if (device_property_read_u32(dev, "ctrl-reset-reg",
1256                                              &hisi_hba->ctrl_reset_reg))
1257                         goto err_out;
1258
1259                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1260                                              &hisi_hba->ctrl_reset_sts_reg))
1261                         goto err_out;
1262
1263                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1264                                              &hisi_hba->ctrl_clock_ena_reg))
1265                         goto err_out;
1266         }
1267
1268         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
1269                 goto err_out;
1270
1271         if (device_property_read_u32(dev, "queue-count",
1272                                      &hisi_hba->queue_count))
1273                 goto err_out;
1274
1275         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1276         hisi_hba->regs = devm_ioremap_resource(dev, res);
1277         if (IS_ERR(hisi_hba->regs))
1278                 goto err_out;
1279
1280         if (hisi_sas_alloc(hisi_hba, shost)) {
1281                 hisi_sas_free(hisi_hba);
1282                 goto err_out;
1283         }
1284
1285         return shost;
1286 err_out:
1287         dev_err(dev, "shost alloc failed\n");
1288         return NULL;
1289 }
1290
1291 static void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1292 {
1293         int i;
1294
1295         for (i = 0; i < hisi_hba->n_phy; i++)
1296                 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1297                        hisi_hba->sas_addr,
1298                        SAS_ADDR_SIZE);
1299 }
1300
1301 int hisi_sas_probe(struct platform_device *pdev,
1302                          const struct hisi_sas_hw *hw)
1303 {
1304         struct Scsi_Host *shost;
1305         struct hisi_hba *hisi_hba;
1306         struct device *dev = &pdev->dev;
1307         struct asd_sas_phy **arr_phy;
1308         struct asd_sas_port **arr_port;
1309         struct sas_ha_struct *sha;
1310         int rc, phy_nr, port_nr, i;
1311
1312         shost = hisi_sas_shost_alloc(pdev, hw);
1313         if (!shost) {
1314                 rc = -ENOMEM;
1315                 goto err_out_ha;
1316         }
1317
1318         sha = SHOST_TO_SAS_HA(shost);
1319         hisi_hba = shost_priv(shost);
1320         platform_set_drvdata(pdev, sha);
1321
1322         if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1323             dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1324                 dev_err(dev, "No usable DMA addressing method\n");
1325                 rc = -EIO;
1326                 goto err_out_ha;
1327         }
1328
1329         phy_nr = port_nr = hisi_hba->n_phy;
1330
1331         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1332         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1333         if (!arr_phy || !arr_port)
1334                 return -ENOMEM;
1335
1336         sha->sas_phy = arr_phy;
1337         sha->sas_port = arr_port;
1338         sha->core.shost = shost;
1339         sha->lldd_ha = hisi_hba;
1340
1341         shost->transportt = hisi_sas_stt;
1342         shost->max_id = HISI_SAS_MAX_DEVICES;
1343         shost->max_lun = ~0;
1344         shost->max_channel = 1;
1345         shost->max_cmd_len = 16;
1346         shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1347         shost->can_queue = hisi_hba->hw->max_command_entries;
1348         shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1349
1350         sha->sas_ha_name = DRV_NAME;
1351         sha->dev = &hisi_hba->pdev->dev;
1352         sha->lldd_module = THIS_MODULE;
1353         sha->sas_addr = &hisi_hba->sas_addr[0];
1354         sha->num_phys = hisi_hba->n_phy;
1355         sha->core.shost = hisi_hba->shost;
1356
1357         for (i = 0; i < hisi_hba->n_phy; i++) {
1358                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1359                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1360         }
1361
1362         hisi_sas_init_add(hisi_hba);
1363
1364         rc = hisi_hba->hw->hw_init(hisi_hba);
1365         if (rc)
1366                 goto err_out_ha;
1367
1368         rc = scsi_add_host(shost, &pdev->dev);
1369         if (rc)
1370                 goto err_out_ha;
1371
1372         rc = sas_register_ha(sha);
1373         if (rc)
1374                 goto err_out_register_ha;
1375
1376         scsi_scan_host(shost);
1377
1378         return 0;
1379
1380 err_out_register_ha:
1381         scsi_remove_host(shost);
1382 err_out_ha:
1383         kfree(shost);
1384         return rc;
1385 }
1386 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1387
1388 int hisi_sas_remove(struct platform_device *pdev)
1389 {
1390         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
1391         struct hisi_hba *hisi_hba = sha->lldd_ha;
1392
1393         scsi_remove_host(sha->core.shost);
1394         sas_unregister_ha(sha);
1395         sas_remove_host(sha->core.shost);
1396
1397         hisi_sas_free(hisi_hba);
1398         return 0;
1399 }
1400 EXPORT_SYMBOL_GPL(hisi_sas_remove);
1401
1402 static __init int hisi_sas_init(void)
1403 {
1404         pr_info("hisi_sas: driver version %s\n", DRV_VERSION);
1405
1406         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
1407         if (!hisi_sas_stt)
1408                 return -ENOMEM;
1409
1410         return 0;
1411 }
1412
1413 static __exit void hisi_sas_exit(void)
1414 {
1415         sas_release_transport(hisi_sas_stt);
1416 }
1417
1418 module_init(hisi_sas_init);
1419 module_exit(hisi_sas_exit);
1420
1421 MODULE_VERSION(DRV_VERSION);
1422 MODULE_LICENSE("GPL");
1423 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
1424 MODULE_DESCRIPTION("HISILICON SAS controller driver");
1425 MODULE_ALIAS("platform:" DRV_NAME);