linux/drivers/scsi/hisi_sas/hisi_sas_main.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright (c) 2015 Linaro Ltd.
   4 * Copyright (c) 2015 Hisilicon Limited.
   5 */
   6
   7#include "hisi_sas.h"
   8#define DRV_NAME "hisi_sas"
   9
  10#define DEV_IS_GONE(dev) \
  11        ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
  12
  13static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
  14                                u8 *lun, struct hisi_sas_tmf_task *tmf);
  15static int
  16hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
  17                             struct domain_device *device,
  18                             int abort_flag, int tag, bool rst_to_recover);
  19static int hisi_sas_softreset_ata_disk(struct domain_device *device);
  20static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
  21                                void *funcdata);
  22static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
  23                                  struct domain_device *device);
  24static void hisi_sas_dev_gone(struct domain_device *device);
  25
  26u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
  27{
  28        switch (fis->command) {
  29        case ATA_CMD_FPDMA_WRITE:
  30        case ATA_CMD_FPDMA_READ:
  31        case ATA_CMD_FPDMA_RECV:
  32        case ATA_CMD_FPDMA_SEND:
  33        case ATA_CMD_NCQ_NON_DATA:
  34                return HISI_SAS_SATA_PROTOCOL_FPDMA;
  35
  36        case ATA_CMD_DOWNLOAD_MICRO:
  37        case ATA_CMD_ID_ATA:
  38        case ATA_CMD_PMP_READ:
  39        case ATA_CMD_READ_LOG_EXT:
  40        case ATA_CMD_PIO_READ:
  41        case ATA_CMD_PIO_READ_EXT:
  42        case ATA_CMD_PMP_WRITE:
  43        case ATA_CMD_WRITE_LOG_EXT:
  44        case ATA_CMD_PIO_WRITE:
  45        case ATA_CMD_PIO_WRITE_EXT:
  46                return HISI_SAS_SATA_PROTOCOL_PIO;
  47
  48        case ATA_CMD_DSM:
  49        case ATA_CMD_DOWNLOAD_MICRO_DMA:
  50        case ATA_CMD_PMP_READ_DMA:
  51        case ATA_CMD_PMP_WRITE_DMA:
  52        case ATA_CMD_READ:
  53        case ATA_CMD_READ_EXT:
  54        case ATA_CMD_READ_LOG_DMA_EXT:
  55        case ATA_CMD_READ_STREAM_DMA_EXT:
  56        case ATA_CMD_TRUSTED_RCV_DMA:
  57        case ATA_CMD_TRUSTED_SND_DMA:
  58        case ATA_CMD_WRITE:
  59        case ATA_CMD_WRITE_EXT:
  60        case ATA_CMD_WRITE_FUA_EXT:
  61        case ATA_CMD_WRITE_QUEUED:
  62        case ATA_CMD_WRITE_LOG_DMA_EXT:
  63        case ATA_CMD_WRITE_STREAM_DMA_EXT:
  64        case ATA_CMD_ZAC_MGMT_IN:
  65                return HISI_SAS_SATA_PROTOCOL_DMA;
  66
  67        case ATA_CMD_CHK_POWER:
  68        case ATA_CMD_DEV_RESET:
  69        case ATA_CMD_EDD:
  70        case ATA_CMD_FLUSH:
  71        case ATA_CMD_FLUSH_EXT:
  72        case ATA_CMD_VERIFY:
  73        case ATA_CMD_VERIFY_EXT:
  74        case ATA_CMD_SET_FEATURES:
  75        case ATA_CMD_STANDBY:
  76        case ATA_CMD_STANDBYNOW1:
  77        case ATA_CMD_ZAC_MGMT_OUT:
  78                return HISI_SAS_SATA_PROTOCOL_NONDATA;
  79
  80        case ATA_CMD_SET_MAX:
  81                switch (fis->features) {
  82                case ATA_SET_MAX_PASSWD:
  83                case ATA_SET_MAX_LOCK:
  84                        return HISI_SAS_SATA_PROTOCOL_PIO;
  85
  86                case ATA_SET_MAX_PASSWD_DMA:
  87                case ATA_SET_MAX_UNLOCK_DMA:
  88                        return HISI_SAS_SATA_PROTOCOL_DMA;
  89
  90                default:
  91                        return HISI_SAS_SATA_PROTOCOL_NONDATA;
  92                }
  93
  94        default:
  95        {
  96                if (direction == DMA_NONE)
  97                        return HISI_SAS_SATA_PROTOCOL_NONDATA;
  98                return HISI_SAS_SATA_PROTOCOL_PIO;
  99        }
 100        }
 101}
 102EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
 103
 104void hisi_sas_sata_done(struct sas_task *task,
 105                            struct hisi_sas_slot *slot)
 106{
 107        struct task_status_struct *ts = &task->task_status;
 108        struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
 109        struct hisi_sas_status_buffer *status_buf =
 110                        hisi_sas_status_buf_addr_mem(slot);
 111        u8 *iu = &status_buf->iu[0];
 112        struct dev_to_host_fis *d2h =  (struct dev_to_host_fis *)iu;
 113
 114        resp->frame_len = sizeof(struct dev_to_host_fis);
 115        memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
 116
 117        ts->buf_valid_size = sizeof(*resp);
 118}
 119EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
 120
 121/*
 122 * This function assumes linkrate mask fits in 8 bits, which it
 123 * does for all HW versions supported.
 124 */
 125u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
 126{
 127        u8 rate = 0;
 128        int i;
 129
 130        max -= SAS_LINK_RATE_1_5_GBPS;
 131        for (i = 0; i <= max; i++)
 132                rate |= 1 << (i * 2);
 133        return rate;
 134}
 135EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
 136
 137static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
 138{
 139        return device->port->ha->lldd_ha;
 140}
 141
 142struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
 143{
 144        return container_of(sas_port, struct hisi_sas_port, sas_port);
 145}
 146EXPORT_SYMBOL_GPL(to_hisi_sas_port);
 147
 148void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
 149{
 150        int phy_no;
 151
 152        for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
 153                hisi_sas_phy_enable(hisi_hba, phy_no, 0);
 154}
 155EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
 156
 157static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
 158{
 159        void *bitmap = hisi_hba->slot_index_tags;
 160
 161        clear_bit(slot_idx, bitmap);
 162}
 163
 164static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
 165{
 166        if (hisi_hba->hw->slot_index_alloc ||
 167            slot_idx >= HISI_SAS_UNRESERVED_IPTT) {
 168                spin_lock(&hisi_hba->lock);
 169                hisi_sas_slot_index_clear(hisi_hba, slot_idx);
 170                spin_unlock(&hisi_hba->lock);
 171        }
 172}
 173
 174static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
 175{
 176        void *bitmap = hisi_hba->slot_index_tags;
 177
 178        set_bit(slot_idx, bitmap);
 179}
 180
 181static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
 182                                     struct scsi_cmnd *scsi_cmnd)
 183{
 184        int index;
 185        void *bitmap = hisi_hba->slot_index_tags;
 186
 187        if (scsi_cmnd)
 188                return scsi_cmnd->request->tag;
 189
 190        spin_lock(&hisi_hba->lock);
 191        index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
 192                                   hisi_hba->last_slot_index + 1);
 193        if (index >= hisi_hba->slot_index_count) {
 194                index = find_next_zero_bit(bitmap,
 195                                hisi_hba->slot_index_count,
 196                                HISI_SAS_UNRESERVED_IPTT);
 197                if (index >= hisi_hba->slot_index_count) {
 198                        spin_unlock(&hisi_hba->lock);
 199                        return -SAS_QUEUE_FULL;
 200                }
 201        }
 202        hisi_sas_slot_index_set(hisi_hba, index);
 203        hisi_hba->last_slot_index = index;
 204        spin_unlock(&hisi_hba->lock);
 205
 206        return index;
 207}
 208
 209static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
 210{
 211        int i;
 212
 213        for (i = 0; i < hisi_hba->slot_index_count; ++i)
 214                hisi_sas_slot_index_clear(hisi_hba, i);
 215}
 216
 217void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
 218                             struct hisi_sas_slot *slot)
 219{
 220        int device_id = slot->device_id;
 221        struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
 222
 223        if (task) {
 224                struct device *dev = hisi_hba->dev;
 225
 226                if (!task->lldd_task)
 227                        return;
 228
 229                task->lldd_task = NULL;
 230
 231                if (!sas_protocol_ata(task->task_proto)) {
 232                        if (slot->n_elem)
 233                                dma_unmap_sg(dev, task->scatter,
 234                                             task->num_scatter,
 235                                             task->data_dir);
 236                        if (slot->n_elem_dif) {
 237                                struct sas_ssp_task *ssp_task = &task->ssp_task;
 238                                struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 239
 240                                dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 241                                             scsi_prot_sg_count(scsi_cmnd),
 242                                             task->data_dir);
 243                        }
 244                }
 245        }
 246
 247        spin_lock(&sas_dev->lock);
 248        list_del_init(&slot->entry);
 249        spin_unlock(&sas_dev->lock);
 250
 251        memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
 252
 253        hisi_sas_slot_index_free(hisi_hba, slot->idx);
 254}
 255EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
 256
 257static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 258                                  struct hisi_sas_slot *slot)
 259{
 260        hisi_hba->hw->prep_smp(hisi_hba, slot);
 261}
 262
 263static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 264                                  struct hisi_sas_slot *slot)
 265{
 266        hisi_hba->hw->prep_ssp(hisi_hba, slot);
 267}
 268
 269static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 270                                  struct hisi_sas_slot *slot)
 271{
 272        hisi_hba->hw->prep_stp(hisi_hba, slot);
 273}
 274
 275static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
 276                struct hisi_sas_slot *slot,
 277                int device_id, int abort_flag, int tag_to_abort)
 278{
 279        hisi_hba->hw->prep_abort(hisi_hba, slot,
 280                        device_id, abort_flag, tag_to_abort);
 281}
 282
 283static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
 284                               struct sas_task *task, int n_elem,
 285                               int n_elem_req)
 286{
 287        struct device *dev = hisi_hba->dev;
 288
 289        if (!sas_protocol_ata(task->task_proto)) {
 290                if (task->num_scatter) {
 291                        if (n_elem)
 292                                dma_unmap_sg(dev, task->scatter,
 293                                             task->num_scatter,
 294                                             task->data_dir);
 295                } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 296                        if (n_elem_req)
 297                                dma_unmap_sg(dev, &task->smp_task.smp_req,
 298                                             1, DMA_TO_DEVICE);
 299                }
 300        }
 301}
 302
 303static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
 304                            struct sas_task *task, int *n_elem,
 305                            int *n_elem_req)
 306{
 307        struct device *dev = hisi_hba->dev;
 308        int rc;
 309
 310        if (sas_protocol_ata(task->task_proto)) {
 311                *n_elem = task->num_scatter;
 312        } else {
 313                unsigned int req_len;
 314
 315                if (task->num_scatter) {
 316                        *n_elem = dma_map_sg(dev, task->scatter,
 317                                             task->num_scatter, task->data_dir);
 318                        if (!*n_elem) {
 319                                rc = -ENOMEM;
 320                                goto prep_out;
 321                        }
 322                } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 323                        *n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
 324                                                 1, DMA_TO_DEVICE);
 325                        if (!*n_elem_req) {
 326                                rc = -ENOMEM;
 327                                goto prep_out;
 328                        }
 329                        req_len = sg_dma_len(&task->smp_task.smp_req);
 330                        if (req_len & 0x3) {
 331                                rc = -EINVAL;
 332                                goto err_out_dma_unmap;
 333                        }
 334                }
 335        }
 336
 337        if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
 338                dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
 339                        *n_elem);
 340                rc = -EINVAL;
 341                goto err_out_dma_unmap;
 342        }
 343        return 0;
 344
 345err_out_dma_unmap:
 346        /* It would be better to call dma_unmap_sg() here, but it's messy */
 347        hisi_sas_dma_unmap(hisi_hba, task, *n_elem,
 348                           *n_elem_req);
 349prep_out:
 350        return rc;
 351}
 352
 353static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
 354                                   struct sas_task *task, int n_elem_dif)
 355{
 356        struct device *dev = hisi_hba->dev;
 357
 358        if (n_elem_dif) {
 359                struct sas_ssp_task *ssp_task = &task->ssp_task;
 360                struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 361
 362                dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 363                             scsi_prot_sg_count(scsi_cmnd),
 364                             task->data_dir);
 365        }
 366}
 367
 368static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
 369                                int *n_elem_dif, struct sas_task *task)
 370{
 371        struct device *dev = hisi_hba->dev;
 372        struct sas_ssp_task *ssp_task;
 373        struct scsi_cmnd *scsi_cmnd;
 374        int rc;
 375
 376        if (task->num_scatter) {
 377                ssp_task = &task->ssp_task;
 378                scsi_cmnd = ssp_task->cmd;
 379
 380                if (scsi_prot_sg_count(scsi_cmnd)) {
 381                        *n_elem_dif = dma_map_sg(dev,
 382                                                 scsi_prot_sglist(scsi_cmnd),
 383                                                 scsi_prot_sg_count(scsi_cmnd),
 384                                                 task->data_dir);
 385
 386                        if (!*n_elem_dif)
 387                                return -ENOMEM;
 388
 389                        if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
 390                                dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
 391                                        *n_elem_dif);
 392                                rc = -EINVAL;
 393                                goto err_out_dif_dma_unmap;
 394                        }
 395                }
 396        }
 397
 398        return 0;
 399
 400err_out_dif_dma_unmap:
 401        dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 402                     scsi_prot_sg_count(scsi_cmnd), task->data_dir);
 403        return rc;
 404}
 405
 406static int hisi_sas_task_prep(struct sas_task *task,
 407                              struct hisi_sas_dq **dq_pointer,
 408                              bool is_tmf, struct hisi_sas_tmf_task *tmf,
 409                              int *pass)
 410{
 411        struct domain_device *device = task->dev;
 412        struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 413        struct hisi_sas_device *sas_dev = device->lldd_dev;
 414        struct hisi_sas_port *port;
 415        struct hisi_sas_slot *slot;
 416        struct hisi_sas_cmd_hdr *cmd_hdr_base;
 417        struct asd_sas_port *sas_port = device->port;
 418        struct device *dev = hisi_hba->dev;
 419        int dlvry_queue_slot, dlvry_queue, rc, slot_idx;
 420        int n_elem = 0, n_elem_dif = 0, n_elem_req = 0;
 421        struct scsi_cmnd *scmd = NULL;
 422        struct hisi_sas_dq *dq;
 423        unsigned long flags;
 424        int wr_q_index;
 425
 426        if (DEV_IS_GONE(sas_dev)) {
 427                if (sas_dev)
 428                        dev_info(dev, "task prep: device %d not ready\n",
 429                                 sas_dev->device_id);
 430                else
 431                        dev_info(dev, "task prep: device %016llx not ready\n",
 432                                 SAS_ADDR(device->sas_addr));
 433
 434                return -ECOMM;
 435        }
 436
 437        if (task->uldd_task) {
 438                struct ata_queued_cmd *qc;
 439
 440                if (dev_is_sata(device)) {
 441                        qc = task->uldd_task;
 442                        scmd = qc->scsicmd;
 443                } else {
 444                        scmd = task->uldd_task;
 445                }
 446        }
 447
 448        if (scmd) {
 449                unsigned int dq_index;
 450                u32 blk_tag;
 451
 452                blk_tag = blk_mq_unique_tag(scmd->request);
 453                dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
 454                *dq_pointer = dq = &hisi_hba->dq[dq_index];
 455        } else {
 456                struct Scsi_Host *shost = hisi_hba->shost;
 457                struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
 458                int queue = qmap->mq_map[raw_smp_processor_id()];
 459
 460                *dq_pointer = dq = &hisi_hba->dq[queue];
 461        }
 462
 463        port = to_hisi_sas_port(sas_port);
 464        if (port && !port->port_attached) {
 465                dev_info(dev, "task prep: %s port%d not attach device\n",
 466                         (dev_is_sata(device)) ?
 467                         "SATA/STP" : "SAS",
 468                         device->port->id);
 469
 470                return -ECOMM;
 471        }
 472
 473        rc = hisi_sas_dma_map(hisi_hba, task, &n_elem,
 474                              &n_elem_req);
 475        if (rc < 0)
 476                goto prep_out;
 477
 478        if (!sas_protocol_ata(task->task_proto)) {
 479                rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
 480                if (rc < 0)
 481                        goto err_out_dma_unmap;
 482        }
 483
 484        if (hisi_hba->hw->slot_index_alloc)
 485                rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
 486        else
 487                rc = hisi_sas_slot_index_alloc(hisi_hba, scmd);
 488
 489        if (rc < 0)
 490                goto err_out_dif_dma_unmap;
 491
 492        slot_idx = rc;
 493        slot = &hisi_hba->slot_info[slot_idx];
 494
 495        spin_lock(&dq->lock);
 496        wr_q_index = dq->wr_point;
 497        dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
 498        list_add_tail(&slot->delivery, &dq->list);
 499        spin_unlock(&dq->lock);
 500        spin_lock(&sas_dev->lock);
 501        list_add_tail(&slot->entry, &sas_dev->list);
 502        spin_unlock(&sas_dev->lock);
 503
 504        dlvry_queue = dq->id;
 505        dlvry_queue_slot = wr_q_index;
 506
 507        slot->device_id = sas_dev->device_id;
 508        slot->n_elem = n_elem;
 509        slot->n_elem_dif = n_elem_dif;
 510        slot->dlvry_queue = dlvry_queue;
 511        slot->dlvry_queue_slot = dlvry_queue_slot;
 512        cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 513        slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 514        slot->task = task;
 515        slot->port = port;
 516        slot->tmf = tmf;
 517        slot->is_internal = is_tmf;
 518        task->lldd_task = slot;
 519
 520        memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 521        memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
 522        memset(hisi_sas_status_buf_addr_mem(slot), 0,
 523               sizeof(struct hisi_sas_err_record));
 524
 525        switch (task->task_proto) {
 526        case SAS_PROTOCOL_SMP:
 527                hisi_sas_task_prep_smp(hisi_hba, slot);
 528                break;
 529        case SAS_PROTOCOL_SSP:
 530                hisi_sas_task_prep_ssp(hisi_hba, slot);
 531                break;
 532        case SAS_PROTOCOL_SATA:
 533        case SAS_PROTOCOL_STP:
 534        case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 535                hisi_sas_task_prep_ata(hisi_hba, slot);
 536                break;
 537        default:
 538                dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
 539                        task->task_proto);
 540                break;
 541        }
 542
 543        spin_lock_irqsave(&task->task_state_lock, flags);
 544        task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 545        spin_unlock_irqrestore(&task->task_state_lock, flags);
 546
 547        ++(*pass);
 548        WRITE_ONCE(slot->ready, 1);
 549
 550        return 0;
 551
 552err_out_dif_dma_unmap:
 553        if (!sas_protocol_ata(task->task_proto))
 554                hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
 555err_out_dma_unmap:
 556        hisi_sas_dma_unmap(hisi_hba, task, n_elem,
 557                           n_elem_req);
 558prep_out:
 559        dev_err(dev, "task prep: failed[%d]!\n", rc);
 560        return rc;
 561}
 562
 563static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
 564                              bool is_tmf, struct hisi_sas_tmf_task *tmf)
 565{
 566        u32 rc;
 567        u32 pass = 0;
 568        struct hisi_hba *hisi_hba;
 569        struct device *dev;
 570        struct domain_device *device = task->dev;
 571        struct asd_sas_port *sas_port = device->port;
 572        struct hisi_sas_dq *dq = NULL;
 573
 574        if (!sas_port) {
 575                struct task_status_struct *ts = &task->task_status;
 576
 577                ts->resp = SAS_TASK_UNDELIVERED;
 578                ts->stat = SAS_PHY_DOWN;
 579                /*
 580                 * libsas will use dev->port, should
 581                 * not call task_done for sata
 582                 */
 583                if (device->dev_type != SAS_SATA_DEV)
 584                        task->task_done(task);
 585                return -ECOMM;
 586        }
 587
 588        hisi_hba = dev_to_hisi_hba(device);
 589        dev = hisi_hba->dev;
 590
 591        if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
 592                if (!gfpflags_allow_blocking(gfp_flags))
 593                        return -EINVAL;
 594
 595                down(&hisi_hba->sem);
 596                up(&hisi_hba->sem);
 597        }
 598
 599        /* protect task_prep and start_delivery sequence */
 600        rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf, &pass);
 601        if (rc)
 602                dev_err(dev, "task exec: failed[%d]!\n", rc);
 603
 604        if (likely(pass)) {
 605                spin_lock(&dq->lock);
 606                hisi_hba->hw->start_delivery(dq);
 607                spin_unlock(&dq->lock);
 608        }
 609
 610        return rc;
 611}
 612
 613static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no,
 614                                 gfp_t gfp_flags)
 615{
 616        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 617        struct asd_sas_phy *sas_phy = &phy->sas_phy;
 618
 619        if (!phy->phy_attached)
 620                return;
 621
 622        if (test_bit(HISI_SAS_PM_BIT, &hisi_hba->flags) &&
 623            !sas_phy->suspended) {
 624                dev_warn(hisi_hba->dev, "phy%d during suspend filtered out\n", phy_no);
 625                return;
 626        }
 627
 628        sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
 629
 630        if (sas_phy->phy) {
 631                struct sas_phy *sphy = sas_phy->phy;
 632
 633                sphy->negotiated_linkrate = sas_phy->linkrate;
 634                sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 635                sphy->maximum_linkrate_hw =
 636                        hisi_hba->hw->phy_get_max_linkrate();
 637                if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
 638                        sphy->minimum_linkrate = phy->minimum_linkrate;
 639
 640                if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
 641                        sphy->maximum_linkrate = phy->maximum_linkrate;
 642        }
 643
 644        if (phy->phy_type & PORT_TYPE_SAS) {
 645                struct sas_identify_frame *id;
 646
 647                id = (struct sas_identify_frame *)phy->frame_rcvd;
 648                id->dev_type = phy->identify.device_type;
 649                id->initiator_bits = SAS_PROTOCOL_ALL;
 650                id->target_bits = phy->identify.target_port_protocols;
 651        } else if (phy->phy_type & PORT_TYPE_SATA) {
 652                /* Nothing */
 653        }
 654
 655        sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 656        sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
 657}
 658
 659static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 660{
 661        struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 662        struct hisi_sas_device *sas_dev = NULL;
 663        int last = hisi_hba->last_dev_id;
 664        int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
 665        int i;
 666
 667        spin_lock(&hisi_hba->lock);
 668        for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
 669                if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 670                        int queue = i % hisi_hba->queue_count;
 671                        struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
 672
 673                        hisi_hba->devices[i].device_id = i;
 674                        sas_dev = &hisi_hba->devices[i];
 675                        sas_dev->dev_status = HISI_SAS_DEV_INIT;
 676                        sas_dev->dev_type = device->dev_type;
 677                        sas_dev->hisi_hba = hisi_hba;
 678                        sas_dev->sas_device = device;
 679                        sas_dev->dq = dq;
 680                        spin_lock_init(&sas_dev->lock);
 681                        INIT_LIST_HEAD(&hisi_hba->devices[i].list);
 682                        break;
 683                }
 684                i++;
 685        }
 686        hisi_hba->last_dev_id = i;
 687        spin_unlock(&hisi_hba->lock);
 688
 689        return sas_dev;
 690}
 691
 692#define HISI_SAS_DISK_RECOVER_CNT 3
 693static int hisi_sas_init_device(struct domain_device *device)
 694{
 695        int rc = TMF_RESP_FUNC_COMPLETE;
 696        struct scsi_lun lun;
 697        struct hisi_sas_tmf_task tmf_task;
 698        int retry = HISI_SAS_DISK_RECOVER_CNT;
 699        struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 700        struct device *dev = hisi_hba->dev;
 701        struct sas_phy *local_phy;
 702
 703        switch (device->dev_type) {
 704        case SAS_END_DEVICE:
 705                int_to_scsilun(0, &lun);
 706
 707                tmf_task.tmf = TMF_CLEAR_TASK_SET;
 708                while (retry-- > 0) {
 709                        rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
 710                                                          &tmf_task);
 711                        if (rc == TMF_RESP_FUNC_COMPLETE) {
 712                                hisi_sas_release_task(hisi_hba, device);
 713                                break;
 714                        }
 715                }
 716                break;
 717        case SAS_SATA_DEV:
 718        case SAS_SATA_PM:
 719        case SAS_SATA_PM_PORT:
 720        case SAS_SATA_PENDING:
 721                /*
 722                 * send HARD RESET to clear previous affiliation of
 723                 * STP target port
 724                 */
 725                local_phy = sas_get_local_phy(device);
 726                if (!scsi_is_sas_phy_local(local_phy) &&
 727                    !test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
 728                        unsigned long deadline = ata_deadline(jiffies, 20000);
 729                        struct sata_device *sata_dev = &device->sata_dev;
 730                        struct ata_host *ata_host = sata_dev->ata_host;
 731                        struct ata_port_operations *ops = ata_host->ops;
 732                        struct ata_port *ap = sata_dev->ap;
 733                        struct ata_link *link;
 734                        unsigned int classes;
 735
 736                        ata_for_each_link(link, ap, EDGE)
 737                                rc = ops->hardreset(link, &classes,
 738                                                    deadline);
 739                }
 740                sas_put_local_phy(local_phy);
 741                if (rc) {
 742                        dev_warn(dev, "SATA disk hardreset fail: %d\n", rc);
 743                        return rc;
 744                }
 745
 746                while (retry-- > 0) {
 747                        rc = hisi_sas_softreset_ata_disk(device);
 748                        if (!rc)
 749                                break;
 750                }
 751                break;
 752        default:
 753                break;
 754        }
 755
 756        return rc;
 757}
 758
 759static int hisi_sas_dev_found(struct domain_device *device)
 760{
 761        struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 762        struct domain_device *parent_dev = device->parent;
 763        struct hisi_sas_device *sas_dev;
 764        struct device *dev = hisi_hba->dev;
 765        int rc;
 766
 767        if (hisi_hba->hw->alloc_dev)
 768                sas_dev = hisi_hba->hw->alloc_dev(device);
 769        else
 770                sas_dev = hisi_sas_alloc_dev(device);
 771        if (!sas_dev) {
 772                dev_err(dev, "fail alloc dev: max support %d devices\n",
 773                        HISI_SAS_MAX_DEVICES);
 774                return -EINVAL;
 775        }
 776
 777        device->lldd_dev = sas_dev;
 778        hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 779
 780        if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 781                int phy_no;
 782                u8 phy_num = parent_dev->ex_dev.num_phys;
 783                struct ex_phy *phy;
 784
 785                for (phy_no = 0; phy_no < phy_num; phy_no++) {
 786                        phy = &parent_dev->ex_dev.ex_phy[phy_no];
 787                        if (SAS_ADDR(phy->attached_sas_addr) ==
 788                                SAS_ADDR(device->sas_addr))
 789                                break;
 790                }
 791
 792                if (phy_no == phy_num) {
 793                        dev_info(dev, "dev found: no attached "
 794                                 "dev:%016llx at ex:%016llx\n",
 795                                 SAS_ADDR(device->sas_addr),
 796                                 SAS_ADDR(parent_dev->sas_addr));
 797                        rc = -EINVAL;
 798                        goto err_out;
 799                }
 800        }
 801
 802        dev_info(dev, "dev[%d:%x] found\n",
 803                sas_dev->device_id, sas_dev->dev_type);
 804
 805        rc = hisi_sas_init_device(device);
 806        if (rc)
 807                goto err_out;
 808        sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 809        return 0;
 810
 811err_out:
 812        hisi_sas_dev_gone(device);
 813        return rc;
 814}
 815
 816int hisi_sas_slave_configure(struct scsi_device *sdev)
 817{
 818        struct domain_device *dev = sdev_to_domain_dev(sdev);
 819        int ret = sas_slave_configure(sdev);
 820
 821        if (ret)
 822                return ret;
 823        if (!dev_is_sata(dev))
 824                sas_change_queue_depth(sdev, 64);
 825
 826        return 0;
 827}
 828EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
 829
 830void hisi_sas_scan_start(struct Scsi_Host *shost)
 831{
 832        struct hisi_hba *hisi_hba = shost_priv(shost);
 833
 834        hisi_hba->hw->phys_init(hisi_hba);
 835}
 836EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
 837
 838int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 839{
 840        struct hisi_hba *hisi_hba = shost_priv(shost);
 841        struct sas_ha_struct *sha = &hisi_hba->sha;
 842
 843        /* Wait for PHY up interrupt to occur */
 844        if (time < HZ)
 845                return 0;
 846
 847        sas_drain_work(sha);
 848        return 1;
 849}
 850EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
 851
 852static void hisi_sas_phyup_work(struct work_struct *work)
 853{
 854        struct hisi_sas_phy *phy =
 855                container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
 856        struct hisi_hba *hisi_hba = phy->hisi_hba;
 857        struct asd_sas_phy *sas_phy = &phy->sas_phy;
 858        int phy_no = sas_phy->id;
 859
 860        phy->wait_phyup_cnt = 0;
 861        if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
 862                hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
 863        hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
 864}
 865
 866static void hisi_sas_linkreset_work(struct work_struct *work)
 867{
 868        struct hisi_sas_phy *phy =
 869                container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
 870        struct asd_sas_phy *sas_phy = &phy->sas_phy;
 871
 872        hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
 873}
 874
 875static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
 876        [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
 877        [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
 878};
 879
 880bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
 881                                enum hisi_sas_phy_event event)
 882{
 883        struct hisi_hba *hisi_hba = phy->hisi_hba;
 884
 885        if (WARN_ON(event >= HISI_PHYES_NUM))
 886                return false;
 887
 888        return queue_work(hisi_hba->wq, &phy->works[event]);
 889}
 890EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
 891
 892static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
 893{
 894        struct hisi_sas_phy *phy = from_timer(phy, t, timer);
 895        struct hisi_hba *hisi_hba = phy->hisi_hba;
 896        struct device *dev = hisi_hba->dev;
 897        int phy_no = phy->sas_phy.id;
 898
 899        dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
 900        hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
 901}
 902
 903#define HISI_SAS_WAIT_PHYUP_RETRIES     10
 904
 905void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
 906{
 907        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 908        struct device *dev = hisi_hba->dev;
 909
 910        dev_dbg(dev, "phy%d OOB ready\n", phy_no);
 911        if (phy->phy_attached)
 912                return;
 913
 914        if (!timer_pending(&phy->timer)) {
 915                if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
 916                        phy->wait_phyup_cnt++;
 917                        phy->timer.expires = jiffies +
 918                                             HISI_SAS_WAIT_PHYUP_TIMEOUT;
 919                        add_timer(&phy->timer);
 920                } else {
 921                        dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
 922                                 phy_no, phy->wait_phyup_cnt);
 923                        phy->wait_phyup_cnt = 0;
 924                }
 925        }
 926}
 927EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
 928
 929static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
 930{
 931        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 932        struct asd_sas_phy *sas_phy = &phy->sas_phy;
 933        int i;
 934
 935        phy->hisi_hba = hisi_hba;
 936        phy->port = NULL;
 937        phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
 938        phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
 939        sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 940        sas_phy->class = SAS;
 941        sas_phy->iproto = SAS_PROTOCOL_ALL;
 942        sas_phy->tproto = 0;
 943        sas_phy->type = PHY_TYPE_PHYSICAL;
 944        sas_phy->role = PHY_ROLE_INITIATOR;
 945        sas_phy->oob_mode = OOB_NOT_CONNECTED;
 946        sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 947        sas_phy->id = phy_no;
 948        sas_phy->sas_addr = &hisi_hba->sas_addr[0];
 949        sas_phy->frame_rcvd = &phy->frame_rcvd[0];
 950        sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
 951        sas_phy->lldd_phy = phy;
 952
 953        for (i = 0; i < HISI_PHYES_NUM; i++)
 954                INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
 955
 956        spin_lock_init(&phy->lock);
 957
 958        timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
 959}
 960
 961/* Wrapper to ensure we track hisi_sas_phy.enable properly */
 962void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
 963{
 964        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 965        struct asd_sas_phy *aphy = &phy->sas_phy;
 966        struct sas_phy *sphy = aphy->phy;
 967        unsigned long flags;
 968
 969        spin_lock_irqsave(&phy->lock, flags);
 970
 971        if (enable) {
 972                /* We may have been enabled already; if so, don't touch */
 973                if (!phy->enable)
 974                        sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
 975                hisi_hba->hw->phy_start(hisi_hba, phy_no);
 976        } else {
 977                sphy->negotiated_linkrate = SAS_PHY_DISABLED;
 978                hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 979        }
 980        phy->enable = enable;
 981        spin_unlock_irqrestore(&phy->lock, flags);
 982}
 983EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
 984
 985static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
 986{
 987        struct sas_ha_struct *sas_ha = sas_phy->ha;
 988        struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 989        struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 990        struct asd_sas_port *sas_port = sas_phy->port;
 991        struct hisi_sas_port *port;
 992        unsigned long flags;
 993
 994        if (!sas_port)
 995                return;
 996
 997        port = to_hisi_sas_port(sas_port);
 998        spin_lock_irqsave(&hisi_hba->lock, flags);
 999        port->port_attached = 1;
1000        port->id = phy->port_id;
1001        phy->port = port;
1002        sas_port->lldd_port = port;
1003        spin_unlock_irqrestore(&hisi_hba->lock, flags);
1004}
1005
1006static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1007                                     struct hisi_sas_slot *slot)
1008{
1009        if (task) {
1010                unsigned long flags;
1011                struct task_status_struct *ts;
1012
1013                ts = &task->task_status;
1014
1015                ts->resp = SAS_TASK_COMPLETE;
1016                ts->stat = SAS_ABORTED_TASK;
1017                spin_lock_irqsave(&task->task_state_lock, flags);
1018                task->task_state_flags &=
1019                        ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1020                if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1021                        task->task_state_flags |= SAS_TASK_STATE_DONE;
1022                spin_unlock_irqrestore(&task->task_state_lock, flags);
1023        }
1024
1025        hisi_sas_slot_task_free(hisi_hba, task, slot);
1026}
1027
1028static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1029                        struct domain_device *device)
1030{
1031        struct hisi_sas_slot *slot, *slot2;
1032        struct hisi_sas_device *sas_dev = device->lldd_dev;
1033
1034        list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1035                hisi_sas_do_release_task(hisi_hba, slot->task, slot);
1036}
1037
1038void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1039{
1040        struct hisi_sas_device *sas_dev;
1041        struct domain_device *device;
1042        int i;
1043
1044        for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1045                sas_dev = &hisi_hba->devices[i];
1046                device = sas_dev->sas_device;
1047
1048                if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1049                    !device)
1050                        continue;
1051
1052                hisi_sas_release_task(hisi_hba, device);
1053        }
1054}
1055EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1056
1057static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1058                                struct domain_device *device)
1059{
1060        if (hisi_hba->hw->dereg_device)
1061                hisi_hba->hw->dereg_device(hisi_hba, device);
1062}
1063
1064static void hisi_sas_dev_gone(struct domain_device *device)
1065{
1066        struct hisi_sas_device *sas_dev = device->lldd_dev;
1067        struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1068        struct device *dev = hisi_hba->dev;
1069        int ret = 0;
1070
1071        dev_info(dev, "dev[%d:%x] is gone\n",
1072                 sas_dev->device_id, sas_dev->dev_type);
1073
1074        down(&hisi_hba->sem);
1075        if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
1076                hisi_sas_internal_task_abort(hisi_hba, device,
1077                                             HISI_SAS_INT_ABT_DEV, 0, true);
1078
1079                hisi_sas_dereg_device(hisi_hba, device);
1080
1081                ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1082                device->lldd_dev = NULL;
1083        }
1084
1085        if (hisi_hba->hw->free_device)
1086                hisi_hba->hw->free_device(sas_dev);
1087
1088        /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1089        if (!ret)
1090                sas_dev->dev_type = SAS_PHY_UNUSED;
1091        sas_dev->sas_device = NULL;
1092        up(&hisi_hba->sem);
1093}
1094
1095static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
1096{
1097        return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
1098}
1099
1100static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1101                        struct sas_phy_linkrates *r)
1102{
1103        struct sas_phy_linkrates _r;
1104
1105        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1106        struct asd_sas_phy *sas_phy = &phy->sas_phy;
1107        enum sas_linkrate min, max;
1108
1109        if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1110                return -EINVAL;
1111
1112        if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1113                max = sas_phy->phy->maximum_linkrate;
1114                min = r->minimum_linkrate;
1115        } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1116                max = r->maximum_linkrate;
1117                min = sas_phy->phy->minimum_linkrate;
1118        } else
1119                return -EINVAL;
1120
1121        _r.maximum_linkrate = max;
1122        _r.minimum_linkrate = min;
1123
1124        sas_phy->phy->maximum_linkrate = max;
1125        sas_phy->phy->minimum_linkrate = min;
1126
1127        hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1128        msleep(100);
1129        hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1130        hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1131
1132        return 0;
1133}
1134
1135static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1136                                void *funcdata)
1137{
1138        struct sas_ha_struct *sas_ha = sas_phy->ha;
1139        struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1140        int phy_no = sas_phy->id;
1141
1142        switch (func) {
1143        case PHY_FUNC_HARD_RESET:
1144                hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1145                break;
1146
1147        case PHY_FUNC_LINK_RESET:
1148                hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1149                msleep(100);
1150                hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1151                break;
1152
1153        case PHY_FUNC_DISABLE:
1154                hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1155                break;
1156
1157        case PHY_FUNC_SET_LINK_RATE:
1158                return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1159        case PHY_FUNC_GET_EVENTS:
1160                if (hisi_hba->hw->get_events) {
1161                        hisi_hba->hw->get_events(hisi_hba, phy_no);
1162                        break;
1163                }
1164                fallthrough;
1165        case PHY_FUNC_RELEASE_SPINUP_HOLD:
1166        default:
1167                return -EOPNOTSUPP;
1168        }
1169        return 0;
1170}
1171
1172static void hisi_sas_task_done(struct sas_task *task)
1173{
1174        del_timer(&task->slow_task->timer);
1175        complete(&task->slow_task->completion);
1176}
1177
1178static void hisi_sas_tmf_timedout(struct timer_list *t)
1179{
1180        struct sas_task_slow *slow = from_timer(slow, t, timer);
1181        struct sas_task *task = slow->task;
1182        unsigned long flags;
1183        bool is_completed = true;
1184
1185        spin_lock_irqsave(&task->task_state_lock, flags);
1186        if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1187                task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1188                is_completed = false;
1189        }
1190        spin_unlock_irqrestore(&task->task_state_lock, flags);
1191
1192        if (!is_completed)
1193                complete(&task->slow_task->completion);
1194}
1195
1196#define TASK_TIMEOUT                    (20 * HZ)
1197#define TASK_RETRY                      3
1198#define INTERNAL_ABORT_TIMEOUT          (6 * HZ)
1199static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
1200                                           void *parameter, u32 para_len,
1201                                           struct hisi_sas_tmf_task *tmf)
1202{
1203        struct hisi_sas_device *sas_dev = device->lldd_dev;
1204        struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1205        struct device *dev = hisi_hba->dev;
1206        struct sas_task *task;
1207        int res, retry;
1208
1209        for (retry = 0; retry < TASK_RETRY; retry++) {
1210                task = sas_alloc_slow_task(GFP_KERNEL);
1211                if (!task)
1212                        return -ENOMEM;
1213
1214                task->dev = device;
1215                task->task_proto = device->tproto;
1216
1217                if (dev_is_sata(device)) {
1218                        task->ata_task.device_control_reg_update = 1;
1219                        memcpy(&task->ata_task.fis, parameter, para_len);
1220                } else {
1221                        memcpy(&task->ssp_task, parameter, para_len);
1222                }
1223                task->task_done = hisi_sas_task_done;
1224
1225                task->slow_task->timer.function = hisi_sas_tmf_timedout;
1226                task->slow_task->timer.expires = jiffies + TASK_TIMEOUT;
1227                add_timer(&task->slow_task->timer);
1228
1229                res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
1230
1231                if (res) {
1232                        del_timer(&task->slow_task->timer);
1233                        dev_err(dev, "abort tmf: executing internal task failed: %d\n",
1234                                res);
1235                        goto ex_err;
1236                }
1237
1238                wait_for_completion(&task->slow_task->completion);
1239                res = TMF_RESP_FUNC_FAILED;
1240                /* Even TMF timed out, return direct. */
1241                if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1242                        if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1243                                struct hisi_sas_slot *slot = task->lldd_task;
1244
1245                                dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1246                                if (slot) {
1247                                        struct hisi_sas_cq *cq =
1248                                               &hisi_hba->cq[slot->dlvry_queue];
1249                                        /*
1250                                         * sync irq to avoid free'ing task
1251                                         * before using task in IO completion
1252                                         */
1253                                        synchronize_irq(cq->irq_no);
1254                                        slot->task = NULL;
1255                                }
1256
1257                                goto ex_err;
1258                        } else
1259                                dev_err(dev, "abort tmf: TMF task timeout\n");
1260                }
1261
1262                if (task->task_status.resp == SAS_TASK_COMPLETE &&
1263                     task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1264                        res = TMF_RESP_FUNC_COMPLETE;
1265                        break;
1266                }
1267
1268                if (task->task_status.resp == SAS_TASK_COMPLETE &&
1269                        task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1270                        res = TMF_RESP_FUNC_SUCC;
1271                        break;
1272                }
1273
1274                if (task->task_status.resp == SAS_TASK_COMPLETE &&
1275                      task->task_status.stat == SAS_DATA_UNDERRUN) {
1276                        /* no error, but return the number of bytes of
1277                         * underrun
1278                         */
1279                        dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x sts 0x%x underrun\n",
1280                                 SAS_ADDR(device->sas_addr),
1281                                 task->task_status.resp,
1282                                 task->task_status.stat);
1283                        res = task->task_status.residual;
1284                        break;
1285                }
1286
1287                if (task->task_status.resp == SAS_TASK_COMPLETE &&
1288                        task->task_status.stat == SAS_DATA_OVERRUN) {
1289                        dev_warn(dev, "abort tmf: blocked task error\n");
1290                        res = -EMSGSIZE;
1291                        break;
1292                }
1293
1294                if (task->task_status.resp == SAS_TASK_COMPLETE &&
1295                    task->task_status.stat == SAS_OPEN_REJECT) {
1296                        dev_warn(dev, "abort tmf: open reject failed\n");
1297                        res = -EIO;
1298                } else {
1299                        dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x status 0x%x\n",
1300                                 SAS_ADDR(device->sas_addr),
1301                                 task->task_status.resp,
1302                                 task->task_status.stat);
1303                }
1304                sas_free_task(task);
1305                task = NULL;
1306        }
1307ex_err:
1308        if (retry == TASK_RETRY)
1309                dev_warn(dev, "abort tmf: executing internal task failed!\n");
1310        sas_free_task(task);
1311        return res;
1312}
1313
1314static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1315                bool reset, int pmp, u8 *fis)
1316{
1317        struct ata_taskfile tf;
1318
1319        ata_tf_init(dev, &tf);
1320        if (reset)
1321                tf.ctl |= ATA_SRST;
1322        else
1323                tf.ctl &= ~ATA_SRST;
1324        tf.command = ATA_CMD_DEV_RESET;
1325        ata_tf_to_fis(&tf, pmp, 0, fis);
1326}
1327
1328static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1329{
1330        u8 fis[20] = {0};
1331        struct ata_port *ap = device->sata_dev.ap;
1332        struct ata_link *link;
1333        int rc = TMF_RESP_FUNC_FAILED;
1334        struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1335        struct device *dev = hisi_hba->dev;
1336        int s = sizeof(struct host_to_dev_fis);
1337
1338        ata_for_each_link(link, ap, EDGE) {
1339                int pmp = sata_srst_pmp(link);
1340
1341                hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1342                rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1343                if (rc != TMF_RESP_FUNC_COMPLETE)
1344                        break;
1345        }
1346
1347        if (rc == TMF_RESP_FUNC_COMPLETE) {
1348                ata_for_each_link(link, ap, EDGE) {
1349                        int pmp = sata_srst_pmp(link);
1350
1351                        hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1352                        rc = hisi_sas_exec_internal_tmf_task(device, fis,
1353                                                             s, NULL);
1354                        if (rc != TMF_RESP_FUNC_COMPLETE)
1355                                dev_err(dev, "ata disk %016llx de-reset failed\n",
1356                                        SAS_ADDR(device->sas_addr));
1357                }
1358        } else {
1359                dev_err(dev, "ata disk %016llx reset failed\n",
1360                        SAS_ADDR(device->sas_addr));
1361        }
1362
1363        if (rc == TMF_RESP_FUNC_COMPLETE)
1364                hisi_sas_release_task(hisi_hba, device);
1365
1366        return rc;
1367}
1368
1369static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1370                                u8 *lun, struct hisi_sas_tmf_task *tmf)
1371{
1372        struct sas_ssp_task ssp_task;
1373
1374        if (!(device->tproto & SAS_PROTOCOL_SSP))
1375                return TMF_RESP_FUNC_ESUPP;
1376
1377        memcpy(ssp_task.LUN, lun, 8);
1378
1379        return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1380                                sizeof(ssp_task), tmf);
1381}
1382
1383static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1384{
1385        u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1386        int i;
1387
1388        for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1389                struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1390                struct domain_device *device = sas_dev->sas_device;
1391                struct asd_sas_port *sas_port;
1392                struct hisi_sas_port *port;
1393                struct hisi_sas_phy *phy = NULL;
1394                struct asd_sas_phy *sas_phy;
1395
1396                if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1397                                || !device || !device->port)
1398                        continue;
1399
1400                sas_port = device->port;
1401                port = to_hisi_sas_port(sas_port);
1402
1403                list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1404                        if (state & BIT(sas_phy->id)) {
1405                                phy = sas_phy->lldd_phy;
1406                                break;
1407                        }
1408
1409                if (phy) {
1410                        port->id = phy->port_id;
1411
1412                        /* Update linkrate of directly attached device. */
1413                        if (!device->parent)
1414                                device->linkrate = phy->sas_phy.linkrate;
1415
1416                        hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1417                } else
1418                        port->id = 0xff;
1419        }
1420}
1421
1422static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1423{
1424        struct asd_sas_port *_sas_port = NULL;
1425        int phy_no;
1426
1427        for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1428                struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1429                struct asd_sas_phy *sas_phy = &phy->sas_phy;
1430                struct asd_sas_port *sas_port = sas_phy->port;
1431                bool do_port_check = _sas_port != sas_port;
1432
1433                if (!sas_phy->phy->enabled)
1434                        continue;
1435
1436                /* Report PHY state change to libsas */
1437                if (state & BIT(phy_no)) {
1438                        if (do_port_check && sas_port && sas_port->port_dev) {
1439                                struct domain_device *dev = sas_port->port_dev;
1440
1441                                _sas_port = sas_port;
1442
1443                                if (dev_is_expander(dev->dev_type))
1444                                        sas_notify_port_event(sas_phy,
1445                                                        PORTE_BROADCAST_RCVD,
1446                                                        GFP_KERNEL);
1447                        }
1448                } else {
1449                        hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1450                }
1451        }
1452}
1453
1454static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1455{
1456        struct hisi_sas_device *sas_dev;
1457        struct domain_device *device;
1458        int i;
1459
1460        for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1461                sas_dev = &hisi_hba->devices[i];
1462                device = sas_dev->sas_device;
1463
1464                if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1465                        continue;
1466
1467                hisi_sas_init_device(device);
1468        }
1469}
1470
1471static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1472                                             struct asd_sas_port *sas_port,
1473                                             struct domain_device *device)
1474{
1475        struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
1476        struct ata_port *ap = device->sata_dev.ap;
1477        struct device *dev = hisi_hba->dev;
1478        int s = sizeof(struct host_to_dev_fis);
1479        int rc = TMF_RESP_FUNC_FAILED;
1480        struct asd_sas_phy *sas_phy;
1481        struct ata_link *link;
1482        u8 fis[20] = {0};
1483        u32 state;
1484
1485        state = hisi_hba->hw->get_phys_state(hisi_hba);
1486        list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) {
1487                if (!(state & BIT(sas_phy->id)))
1488                        continue;
1489
1490                ata_for_each_link(link, ap, EDGE) {
1491                        int pmp = sata_srst_pmp(link);
1492
1493                        tmf_task.phy_id = sas_phy->id;
1494                        hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1495                        rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
1496                                                             &tmf_task);
1497                        if (rc != TMF_RESP_FUNC_COMPLETE) {
1498                                dev_err(dev, "phy%d ata reset failed rc=%d\n",
1499                                        sas_phy->id, rc);
1500                                break;
1501                        }
1502                }
1503        }
1504}
1505
1506static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1507{
1508        struct device *dev = hisi_hba->dev;
1509        int port_no, rc, i;
1510
1511        for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1512                struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1513                struct domain_device *device = sas_dev->sas_device;
1514
1515                if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1516                        continue;
1517
1518                rc = hisi_sas_internal_task_abort(hisi_hba, device,
1519                                                  HISI_SAS_INT_ABT_DEV, 0,
1520                                                  false);
1521                if (rc < 0)
1522                        dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1523        }
1524
1525        for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1526                struct hisi_sas_port *port = &hisi_hba->port[port_no];
1527                struct asd_sas_port *sas_port = &port->sas_port;
1528                struct domain_device *port_dev = sas_port->port_dev;
1529                struct domain_device *device;
1530
1531                if (!port_dev || !dev_is_expander(port_dev->dev_type))
1532                        continue;
1533
1534                /* Try to find a SATA device */
1535                list_for_each_entry(device, &sas_port->dev_list,
1536                                    dev_list_node) {
1537                        if (dev_is_sata(device)) {
1538                                hisi_sas_send_ata_reset_each_phy(hisi_hba,
1539                                                                 sas_port,
1540                                                                 device);
1541                                break;
1542                        }
1543                }
1544        }
1545}
1546
1547void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1548{
1549        struct Scsi_Host *shost = hisi_hba->shost;
1550
1551        down(&hisi_hba->sem);
1552        hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1553
1554        scsi_block_requests(shost);
1555        hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1556
1557        if (timer_pending(&hisi_hba->timer))
1558                del_timer_sync(&hisi_hba->timer);
1559
1560        set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1561}
1562EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1563
1564void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1565{
1566        struct Scsi_Host *shost = hisi_hba->shost;
1567
1568        /* Init and wait for PHYs to come up and all libsas event finished. */
1569        hisi_hba->hw->phys_init(hisi_hba);
1570        msleep(1000);
1571        hisi_sas_refresh_port_id(hisi_hba);
1572        clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1573
1574        if (hisi_hba->reject_stp_links_msk)
1575                hisi_sas_terminate_stp_reject(hisi_hba);
1576        hisi_sas_reset_init_all_devices(hisi_hba);
1577        up(&hisi_hba->sem);
1578        scsi_unblock_requests(shost);
1579        clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1580
1581        hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1582}
1583EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1584
1585static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1586{
1587        if (!hisi_hba->hw->soft_reset)
1588                return -1;
1589
1590        if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1591                return -1;
1592
1593        if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1594                hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1595
1596        return 0;
1597}
1598
1599static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1600{
1601        struct device *dev = hisi_hba->dev;
1602        struct Scsi_Host *shost = hisi_hba->shost;
1603        int rc;
1604
1605        dev_info(dev, "controller resetting...\n");
1606        hisi_sas_controller_reset_prepare(hisi_hba);
1607
1608        rc = hisi_hba->hw->soft_reset(hisi_hba);
1609        if (rc) {
1610                dev_warn(dev, "controller reset failed (%d)\n", rc);
1611                clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1612                up(&hisi_hba->sem);
1613                scsi_unblock_requests(shost);
1614                clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1615                return rc;
1616        }
1617
1618        hisi_sas_controller_reset_done(hisi_hba);
1619        clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1620        dev_info(dev, "controller reset complete\n");
1621
1622        return 0;
1623}
1624
1625static int hisi_sas_abort_task(struct sas_task *task)
1626{
1627        struct scsi_lun lun;
1628        struct hisi_sas_tmf_task tmf_task;
1629        struct domain_device *device = task->dev;
1630        struct hisi_sas_device *sas_dev = device->lldd_dev;
1631        struct hisi_hba *hisi_hba;
1632        struct device *dev;
1633        int rc = TMF_RESP_FUNC_FAILED;
1634        unsigned long flags;
1635
1636        if (!sas_dev)
1637                return TMF_RESP_FUNC_FAILED;
1638
1639        hisi_hba = dev_to_hisi_hba(task->dev);
1640        dev = hisi_hba->dev;
1641
1642        spin_lock_irqsave(&task->task_state_lock, flags);
1643        if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1644                struct hisi_sas_slot *slot = task->lldd_task;
1645                struct hisi_sas_cq *cq;
1646
1647                if (slot) {
1648                        /*
1649                         * sync irq to avoid free'ing task
1650                         * before using task in IO completion
1651                         */
1652                        cq = &hisi_hba->cq[slot->dlvry_queue];
1653                        synchronize_irq(cq->irq_no);
1654                }
1655                spin_unlock_irqrestore(&task->task_state_lock, flags);
1656                rc = TMF_RESP_FUNC_COMPLETE;
1657                goto out;
1658        }
1659        task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1660        spin_unlock_irqrestore(&task->task_state_lock, flags);
1661
1662        if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1663                struct scsi_cmnd *cmnd = task->uldd_task;
1664                struct hisi_sas_slot *slot = task->lldd_task;
1665                u16 tag = slot->idx;
1666                int rc2;
1667
1668                int_to_scsilun(cmnd->device->lun, &lun);
1669                tmf_task.tmf = TMF_ABORT_TASK;
1670                tmf_task.tag_of_task_to_be_managed = tag;
1671
1672                rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1673                                                  &tmf_task);
1674
1675                rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1676                                                   HISI_SAS_INT_ABT_CMD, tag,
1677                                                   false);
1678                if (rc2 < 0) {
1679                        dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1680                        return TMF_RESP_FUNC_FAILED;
1681                }
1682
1683                /*
1684                 * If the TMF finds that the IO is not in the device and also
1685                 * the internal abort does not succeed, then it is safe to
1686                 * free the slot.
1687                 * Note: if the internal abort succeeds then the slot
1688                 * will have already been completed
1689                 */
1690                if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1691                        if (task->lldd_task)
1692                                hisi_sas_do_release_task(hisi_hba, task, slot);
1693                }
1694        } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1695                task->task_proto & SAS_PROTOCOL_STP) {
1696                if (task->dev->dev_type == SAS_SATA_DEV) {
1697                        rc = hisi_sas_internal_task_abort(hisi_hba, device,
1698                                                          HISI_SAS_INT_ABT_DEV,
1699                                                          0, false);
1700                        if (rc < 0) {
1701                                dev_err(dev, "abort task: internal abort failed\n");
1702                                goto out;
1703                        }
1704                        hisi_sas_dereg_device(hisi_hba, device);
1705                        rc = hisi_sas_softreset_ata_disk(device);
1706                }
1707        } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1708                /* SMP */
1709                struct hisi_sas_slot *slot = task->lldd_task;
1710                u32 tag = slot->idx;
1711                struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1712
1713                rc = hisi_sas_internal_task_abort(hisi_hba, device,
1714                                                  HISI_SAS_INT_ABT_CMD, tag,
1715                                                  false);
1716                if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1717                                        task->lldd_task) {
1718                        /*
1719                         * sync irq to avoid free'ing task
1720                         * before using task in IO completion
1721                         */
1722                        synchronize_irq(cq->irq_no);
1723                        slot->task = NULL;
1724                }
1725        }
1726
1727out:
1728        if (rc != TMF_RESP_FUNC_COMPLETE)
1729                dev_notice(dev, "abort task: rc=%d\n", rc);
1730        return rc;
1731}
1732
1733static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1734{
1735        struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1736        struct device *dev = hisi_hba->dev;
1737        struct hisi_sas_tmf_task tmf_task;
1738        int rc;
1739
1740        rc = hisi_sas_internal_task_abort(hisi_hba, device,
1741                                          HISI_SAS_INT_ABT_DEV, 0, false);
1742        if (rc < 0) {
1743                dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1744                return TMF_RESP_FUNC_FAILED;
1745        }
1746        hisi_sas_dereg_device(hisi_hba, device);
1747
1748        tmf_task.tmf = TMF_ABORT_TASK_SET;
1749        rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1750
1751        if (rc == TMF_RESP_FUNC_COMPLETE)
1752                hisi_sas_release_task(hisi_hba, device);
1753
1754        return rc;
1755}
1756
1757static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1758{
1759        struct hisi_sas_tmf_task tmf_task;
1760        int rc;
1761
1762        tmf_task.tmf = TMF_CLEAR_ACA;
1763        rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1764
1765        return rc;
1766}
1767
1768#define I_T_NEXUS_RESET_PHYUP_TIMEOUT  (2 * HZ)
1769
1770static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1771{
1772        struct sas_phy *local_phy = sas_get_local_phy(device);
1773        struct hisi_sas_device *sas_dev = device->lldd_dev;
1774        struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1775        struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1776        DECLARE_COMPLETION_ONSTACK(phyreset);
1777        int rc, reset_type;
1778
1779        if (!local_phy->enabled) {
1780                sas_put_local_phy(local_phy);
1781                return -ENODEV;
1782        }
1783
1784        if (scsi_is_sas_phy_local(local_phy)) {
1785                struct asd_sas_phy *sas_phy =
1786                        sas_ha->sas_phy[local_phy->number];
1787                struct hisi_sas_phy *phy =
1788                        container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1789                phy->in_reset = 1;
1790                phy->reset_completion = &phyreset;
1791        }
1792
1793        reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1794                      !dev_is_sata(device)) ? true : false;
1795
1796        rc = sas_phy_reset(local_phy, reset_type);
1797        sas_put_local_phy(local_phy);
1798
1799        if (scsi_is_sas_phy_local(local_phy)) {
1800                struct asd_sas_phy *sas_phy =
1801                        sas_ha->sas_phy[local_phy->number];
1802                struct hisi_sas_phy *phy =
1803                        container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1804                int ret = wait_for_completion_timeout(&phyreset,
1805                                                I_T_NEXUS_RESET_PHYUP_TIMEOUT);
1806                unsigned long flags;
1807
1808                spin_lock_irqsave(&phy->lock, flags);
1809                phy->reset_completion = NULL;
1810                phy->in_reset = 0;
1811                spin_unlock_irqrestore(&phy->lock, flags);
1812
1813                /* report PHY down if timed out */
1814                if (!ret)
1815                        hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1816        } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) {
1817                /*
1818                 * If in init state, we rely on caller to wait for link to be
1819                 * ready; otherwise, except phy reset is fail, delay.
1820                 */
1821                if (!rc)
1822                        msleep(2000);
1823        }
1824
1825        return rc;
1826}
1827
1828static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1829{
1830        struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1831        struct device *dev = hisi_hba->dev;
1832        int rc;
1833
1834        rc = hisi_sas_internal_task_abort(hisi_hba, device,
1835                                          HISI_SAS_INT_ABT_DEV, 0, false);
1836        if (rc < 0) {
1837                dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1838                return TMF_RESP_FUNC_FAILED;
1839        }
1840        hisi_sas_dereg_device(hisi_hba, device);
1841
1842        if (dev_is_sata(device)) {
1843                rc = hisi_sas_softreset_ata_disk(device);
1844                if (rc == TMF_RESP_FUNC_FAILED)
1845                        return TMF_RESP_FUNC_FAILED;
1846        }
1847
1848        rc = hisi_sas_debug_I_T_nexus_reset(device);
1849
1850        if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1851                hisi_sas_release_task(hisi_hba, device);
1852
1853        return rc;
1854}
1855
1856static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1857{
1858        struct hisi_sas_device *sas_dev = device->lldd_dev;
1859        struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1860        struct device *dev = hisi_hba->dev;
1861        int rc = TMF_RESP_FUNC_FAILED;
1862
1863        /* Clear internal IO and then lu reset */
1864        rc = hisi_sas_internal_task_abort(hisi_hba, device,
1865                                          HISI_SAS_INT_ABT_DEV, 0, false);
1866        if (rc < 0) {
1867                dev_err(dev, "lu_reset: internal abort failed\n");
1868                goto out;
1869        }
1870        hisi_sas_dereg_device(hisi_hba, device);
1871
1872        if (dev_is_sata(device)) {
1873                struct sas_phy *phy;
1874
1875                phy = sas_get_local_phy(device);
1876
1877                rc = sas_phy_reset(phy, true);
1878
1879                if (rc == 0)
1880                        hisi_sas_release_task(hisi_hba, device);
1881                sas_put_local_phy(phy);
1882        } else {
1883                struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };
1884
1885                rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1886                if (rc == TMF_RESP_FUNC_COMPLETE)
1887                        hisi_sas_release_task(hisi_hba, device);
1888        }
1889out:
1890        if (rc != TMF_RESP_FUNC_COMPLETE)
1891                dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1892                             sas_dev->device_id, rc);
1893        return rc;
1894}
1895
1896static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1897{
1898        struct domain_device *device = data;
1899        struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1900        int rc;
1901
1902        rc = hisi_sas_debug_I_T_nexus_reset(device);
1903        if (rc != TMF_RESP_FUNC_COMPLETE)
1904                dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1905                         SAS_ADDR(device->sas_addr), rc);
1906}
1907
1908static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1909{
1910        struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1911        HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1912        ASYNC_DOMAIN_EXCLUSIVE(async);
1913        int i;
1914
1915        queue_work(hisi_hba->wq, &r.work);
1916        wait_for_completion(r.completion);
1917        if (!r.done)
1918                return TMF_RESP_FUNC_FAILED;
1919
1920        for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1921                struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1922                struct domain_device *device = sas_dev->sas_device;
1923
1924                if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1925                    dev_is_expander(device->dev_type))
1926                        continue;
1927
1928                async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1929                                      device, &async);
1930        }
1931
1932        async_synchronize_full_domain(&async);
1933        hisi_sas_release_tasks(hisi_hba);
1934
1935        return TMF_RESP_FUNC_COMPLETE;
1936}
1937
1938static int hisi_sas_query_task(struct sas_task *task)
1939{
1940        struct scsi_lun lun;
1941        struct hisi_sas_tmf_task tmf_task;
1942        int rc = TMF_RESP_FUNC_FAILED;
1943
1944        if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1945                struct scsi_cmnd *cmnd = task->uldd_task;
1946                struct domain_device *device = task->dev;
1947                struct hisi_sas_slot *slot = task->lldd_task;
1948                u32 tag = slot->idx;
1949
1950                int_to_scsilun(cmnd->device->lun, &lun);
1951                tmf_task.tmf = TMF_QUERY_TASK;
1952                tmf_task.tag_of_task_to_be_managed = tag;
1953
1954                rc = hisi_sas_debug_issue_ssp_tmf(device,
1955                                                  lun.scsi_lun,
1956                                                  &tmf_task);
1957                switch (rc) {
1958                /* The task is still in Lun, release it then */
1959                case TMF_RESP_FUNC_SUCC:
1960                /* The task is not in Lun or failed, reset the phy */
1961                case TMF_RESP_FUNC_FAILED:
1962                case TMF_RESP_FUNC_COMPLETE:
1963                        break;
1964                default:
1965                        rc = TMF_RESP_FUNC_FAILED;
1966                        break;
1967                }
1968        }
1969        return rc;
1970}
1971
1972static int
1973hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1974                                  struct sas_task *task, int abort_flag,
1975                                  int task_tag, struct hisi_sas_dq *dq)
1976{
1977        struct domain_device *device = task->dev;
1978        struct hisi_sas_device *sas_dev = device->lldd_dev;
1979        struct device *dev = hisi_hba->dev;
1980        struct hisi_sas_port *port;
1981        struct hisi_sas_slot *slot;
1982        struct asd_sas_port *sas_port = device->port;
1983        struct hisi_sas_cmd_hdr *cmd_hdr_base;
1984        int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1985        unsigned long flags;
1986        int wr_q_index;
1987
1988        if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1989                return -EINVAL;
1990
1991        if (!device->port)
1992                return -1;
1993
1994        port = to_hisi_sas_port(sas_port);
1995
1996        /* simply get a slot and send abort command */
1997        rc = hisi_sas_slot_index_alloc(hisi_hba, NULL);
1998        if (rc < 0)
1999                goto err_out;
2000
2001        slot_idx = rc;
2002        slot = &hisi_hba->slot_info[slot_idx];
2003
2004        spin_lock(&dq->lock);
2005        wr_q_index = dq->wr_point;
2006        dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
2007        list_add_tail(&slot->delivery, &dq->list);
2008        spin_unlock(&dq->lock);
2009        spin_lock(&sas_dev->lock);
2010        list_add_tail(&slot->entry, &sas_dev->list);
2011        spin_unlock(&sas_dev->lock);
2012
2013        dlvry_queue = dq->id;
2014        dlvry_queue_slot = wr_q_index;
2015
2016        slot->device_id = sas_dev->device_id;
2017        slot->n_elem = n_elem;
2018        slot->dlvry_queue = dlvry_queue;
2019        slot->dlvry_queue_slot = dlvry_queue_slot;
2020        cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
2021        slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
2022        slot->task = task;
2023        slot->port = port;
2024        slot->is_internal = true;
2025        task->lldd_task = slot;
2026
2027        memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
2028        memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
2029        memset(hisi_sas_status_buf_addr_mem(slot), 0,
2030               sizeof(struct hisi_sas_err_record));
2031
2032        hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
2033                                      abort_flag, task_tag);
2034
2035        spin_lock_irqsave(&task->task_state_lock, flags);
2036        task->task_state_flags |= SAS_TASK_AT_INITIATOR;
2037        spin_unlock_irqrestore(&task->task_state_lock, flags);
2038        WRITE_ONCE(slot->ready, 1);
2039        /* send abort command to the chip */
2040        spin_lock(&dq->lock);
2041        hisi_hba->hw->start_delivery(dq);
2042        spin_unlock(&dq->lock);
2043
2044        return 0;
2045
2046err_out:
2047        dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
2048
2049        return rc;
2050}
2051
2052/**
2053 * _hisi_sas_internal_task_abort -- execute an internal
2054 * abort command for single IO command or a device
2055 * @hisi_hba: host controller struct
2056 * @device: domain device
2057 * @abort_flag: mode of operation, device or single IO
2058 * @tag: tag of IO to be aborted (only relevant to single
2059 *       IO mode)
2060 * @dq: delivery queue for this internal abort command
2061 * @rst_to_recover: If rst_to_recover set, queue a controller
2062 *                  reset if an internal abort times out.
2063 */
2064static int
2065_hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2066                              struct domain_device *device, int abort_flag,
2067                              int tag, struct hisi_sas_dq *dq, bool rst_to_recover)
2068{
2069        struct sas_task *task;
2070        struct hisi_sas_device *sas_dev = device->lldd_dev;
2071        struct device *dev = hisi_hba->dev;
2072        int res;
2073
2074        /*
2075         * The interface is not realized means this HW don't support internal
2076         * abort, or don't need to do internal abort. Then here, we return
2077         * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
2078         * the internal abort has been executed and returned CQ.
2079         */
2080        if (!hisi_hba->hw->prep_abort)
2081                return TMF_RESP_FUNC_FAILED;
2082
2083        if (test_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags))
2084                return -EIO;
2085
2086        task = sas_alloc_slow_task(GFP_KERNEL);
2087        if (!task)
2088                return -ENOMEM;
2089
2090        task->dev = device;
2091        task->task_proto = device->tproto;
2092        task->task_done = hisi_sas_task_done;
2093        task->slow_task->timer.function = hisi_sas_tmf_timedout;
2094        task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT;
2095        add_timer(&task->slow_task->timer);
2096
2097        res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
2098                                                task, abort_flag, tag, dq);
2099        if (res) {
2100                del_timer(&task->slow_task->timer);
2101                dev_err(dev, "internal task abort: executing internal task failed: %d\n",
2102                        res);
2103                goto exit;
2104        }
2105        wait_for_completion(&task->slow_task->completion);
2106        res = TMF_RESP_FUNC_FAILED;
2107
2108        /* Internal abort timed out */
2109        if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
2110                if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
2111                        queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
2112
2113                if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
2114                        struct hisi_sas_slot *slot = task->lldd_task;
2115
2116                        set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
2117
2118                        if (slot) {
2119                                struct hisi_sas_cq *cq =
2120                                        &hisi_hba->cq[slot->dlvry_queue];
2121                                /*
2122                                 * sync irq to avoid free'ing task
2123                                 * before using task in IO completion
2124                                 */
2125                                synchronize_irq(cq->irq_no);
2126                                slot->task = NULL;
2127                        }
2128
2129                        if (rst_to_recover) {
2130                                dev_err(dev, "internal task abort: timeout and not done. Queuing reset.\n");
2131                                queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2132                        } else {
2133                                dev_err(dev, "internal task abort: timeout and not done.\n");
2134                        }
2135
2136                        res = -EIO;
2137                        goto exit;
2138                } else
2139                        dev_err(dev, "internal task abort: timeout.\n");
2140        }
2141
2142        if (task->task_status.resp == SAS_TASK_COMPLETE &&
2143                task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
2144                res = TMF_RESP_FUNC_COMPLETE;
2145                goto exit;
2146        }
2147
2148        if (task->task_status.resp == SAS_TASK_COMPLETE &&
2149                task->task_status.stat == TMF_RESP_FUNC_SUCC) {
2150                res = TMF_RESP_FUNC_SUCC;
2151                goto exit;
2152        }
2153
2154exit:
2155        dev_dbg(dev, "internal task abort: task to dev %016llx task=%pK resp: 0x%x sts 0x%x\n",
2156                SAS_ADDR(device->sas_addr), task,
2157                task->task_status.resp, /* 0 is complete, -1 is undelivered */
2158                task->task_status.stat);
2159        sas_free_task(task);
2160
2161        return res;
2162}
2163
2164static int
2165hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2166                             struct domain_device *device,
2167                             int abort_flag, int tag, bool rst_to_recover)
2168{
2169        struct hisi_sas_slot *slot;
2170        struct device *dev = hisi_hba->dev;
2171        struct hisi_sas_dq *dq;
2172        int i, rc;
2173
2174        switch (abort_flag) {
2175        case HISI_SAS_INT_ABT_CMD:
2176                slot = &hisi_hba->slot_info[tag];
2177                dq = &hisi_hba->dq[slot->dlvry_queue];
2178                return _hisi_sas_internal_task_abort(hisi_hba, device,
2179                                                     abort_flag, tag, dq,
2180                                                     rst_to_recover);
2181        case HISI_SAS_INT_ABT_DEV:
2182                for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2183                        struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2184                        const struct cpumask *mask = cq->irq_mask;
2185
2186                        if (mask && !cpumask_intersects(cpu_online_mask, mask))
2187                                continue;
2188                        dq = &hisi_hba->dq[i];
2189                        rc = _hisi_sas_internal_task_abort(hisi_hba, device,
2190                                                           abort_flag, tag,
2191                                                           dq, rst_to_recover);
2192                        if (rc)
2193                                return rc;
2194                }
2195                break;
2196        default:
2197                dev_err(dev, "Unrecognised internal abort flag (%d)\n",
2198                        abort_flag);
2199                return -EINVAL;
2200        }
2201
2202        return 0;
2203}
2204
2205static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2206{
2207        hisi_sas_port_notify_formed(sas_phy);
2208}
2209
2210static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2211                        u8 reg_index, u8 reg_count, u8 *write_data)
2212{
2213        struct hisi_hba *hisi_hba = sha->lldd_ha;
2214
2215        if (!hisi_hba->hw->write_gpio)
2216                return -EOPNOTSUPP;
2217
2218        return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2219                                reg_index, reg_count, write_data);
2220}
2221
2222static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2223{
2224        struct asd_sas_phy *sas_phy = &phy->sas_phy;
2225        struct sas_phy *sphy = sas_phy->phy;
2226        unsigned long flags;
2227
2228        phy->phy_attached = 0;
2229        phy->phy_type = 0;
2230        phy->port = NULL;
2231
2232        spin_lock_irqsave(&phy->lock, flags);
2233        if (phy->enable)
2234                sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2235        else
2236                sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2237        spin_unlock_irqrestore(&phy->lock, flags);
2238}
2239
2240void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2241                       gfp_t gfp_flags)
2242{
2243        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2244        struct asd_sas_phy *sas_phy = &phy->sas_phy;
2245        struct device *dev = hisi_hba->dev;
2246
2247        if (rdy) {
2248                /* Phy down but ready */
2249                hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2250                hisi_sas_port_notify_formed(sas_phy);
2251        } else {
2252                struct hisi_sas_port *port  = phy->port;
2253
2254                if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
2255                    phy->in_reset) {
2256                        dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2257                        return;
2258                }
2259                /* Phy down and not ready */
2260                sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2261                sas_phy_disconnected(sas_phy);
2262
2263                if (port) {
2264                        if (phy->phy_type & PORT_TYPE_SAS) {
2265                                int port_id = port->id;
2266
2267                                if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2268                                                                       port_id))
2269                                        port->port_attached = 0;
2270                        } else if (phy->phy_type & PORT_TYPE_SATA)
2271                                port->port_attached = 0;
2272                }
2273                hisi_sas_phy_disconnected(phy);
2274        }
2275}
2276EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2277
2278void hisi_sas_sync_irqs(struct hisi_hba *hisi_hba)
2279{
2280        int i;
2281
2282        for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2283                struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2284
2285                synchronize_irq(cq->irq_no);
2286        }
2287}
2288EXPORT_SYMBOL_GPL(hisi_sas_sync_irqs);
2289
2290int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2291{
2292        struct hisi_hba *hisi_hba = shost_priv(shost);
2293
2294        if (reset_type != SCSI_ADAPTER_RESET)
2295                return -EOPNOTSUPP;
2296
2297        queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2298
2299        return 0;
2300}
2301EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2302
2303struct scsi_transport_template *hisi_sas_stt;
2304EXPORT_SYMBOL_GPL(hisi_sas_stt);
2305
2306static struct sas_domain_function_template hisi_sas_transport_ops = {
2307        .lldd_dev_found         = hisi_sas_dev_found,
2308        .lldd_dev_gone          = hisi_sas_dev_gone,
2309        .lldd_execute_task      = hisi_sas_queue_command,
2310        .lldd_control_phy       = hisi_sas_control_phy,
2311        .lldd_abort_task        = hisi_sas_abort_task,
2312        .lldd_abort_task_set    = hisi_sas_abort_task_set,
2313        .lldd_clear_aca         = hisi_sas_clear_aca,
2314        .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
2315        .lldd_lu_reset          = hisi_sas_lu_reset,
2316        .lldd_query_task        = hisi_sas_query_task,
2317        .lldd_clear_nexus_ha    = hisi_sas_clear_nexus_ha,
2318        .lldd_port_formed       = hisi_sas_port_formed,
2319        .lldd_write_gpio        = hisi_sas_write_gpio,
2320};
2321
2322void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2323{
2324        int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2325        struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2326
2327        for (i = 0; i < hisi_hba->queue_count; i++) {
2328                struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2329                struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2330                struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2331
2332                s = sizeof(struct hisi_sas_cmd_hdr);
2333                for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2334                        memset(&cmd_hdr[j], 0, s);
2335
2336                dq->wr_point = 0;
2337
2338                s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2339                memset(hisi_hba->complete_hdr[i], 0, s);
2340                cq->rd_point = 0;
2341        }
2342
2343        s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2344        memset(hisi_hba->initial_fis, 0, s);
2345
2346        s = max_command_entries * sizeof(struct hisi_sas_iost);
2347        memset(hisi_hba->iost, 0, s);
2348
2349        s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2350        memset(hisi_hba->breakpoint, 0, s);
2351
2352        s = sizeof(struct hisi_sas_sata_breakpoint);
2353        for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2354                memset(&sata_breakpoint[j], 0, s);
2355}
2356EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2357
2358int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2359{
2360        struct device *dev = hisi_hba->dev;
2361        int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2362        int max_command_entries_ru, sz_slot_buf_ru;
2363        int blk_cnt, slots_per_blk;
2364
2365        sema_init(&hisi_hba->sem, 1);
2366        spin_lock_init(&hisi_hba->lock);
2367        for (i = 0; i < hisi_hba->n_phy; i++) {
2368                hisi_sas_phy_init(hisi_hba, i);
2369                hisi_hba->port[i].port_attached = 0;
2370                hisi_hba->port[i].id = -1;
2371        }
2372
2373        for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2374                hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2375                hisi_hba->devices[i].device_id = i;
2376                hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2377        }
2378
2379        for (i = 0; i < hisi_hba->queue_count; i++) {
2380                struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2381                struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2382
2383                /* Completion queue structure */
2384                cq->id = i;
2385                cq->hisi_hba = hisi_hba;
2386
2387                /* Delivery queue structure */
2388                spin_lock_init(&dq->lock);
2389                INIT_LIST_HEAD(&dq->list);
2390                dq->id = i;
2391                dq->hisi_hba = hisi_hba;
2392
2393                /* Delivery queue */
2394                s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2395                hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2396                                                &hisi_hba->cmd_hdr_dma[i],
2397                                                GFP_KERNEL);
2398                if (!hisi_hba->cmd_hdr[i])
2399                        goto err_out;
2400
2401                /* Completion queue */
2402                s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2403                hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2404                                                &hisi_hba->complete_hdr_dma[i],
2405                                                GFP_KERNEL);
2406                if (!hisi_hba->complete_hdr[i])
2407                        goto err_out;
2408        }
2409
2410        s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2411        hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2412                                             GFP_KERNEL);
2413        if (!hisi_hba->itct)
2414                goto err_out;
2415
2416        hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2417                                           sizeof(struct hisi_sas_slot),
2418                                           GFP_KERNEL);
2419        if (!hisi_hba->slot_info)
2420                goto err_out;
2421
2422        /* roundup to avoid overly large block size */
2423        max_command_entries_ru = roundup(max_command_entries, 64);
2424        if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2425                sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2426        else
2427                sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2428        sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2429        s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2430        blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2431        slots_per_blk = s / sz_slot_buf_ru;
2432
2433        for (i = 0; i < blk_cnt; i++) {
2434                int slot_index = i * slots_per_blk;
2435                dma_addr_t buf_dma;
2436                void *buf;
2437
2438                buf = dmam_alloc_coherent(dev, s, &buf_dma,
2439                                          GFP_KERNEL);
2440                if (!buf)
2441                        goto err_out;
2442
2443                for (j = 0; j < slots_per_blk; j++, slot_index++) {
2444                        struct hisi_sas_slot *slot;
2445
2446                        slot = &hisi_hba->slot_info[slot_index];
2447                        slot->buf = buf;
2448                        slot->buf_dma = buf_dma;
2449                        slot->idx = slot_index;
2450
2451                        buf += sz_slot_buf_ru;
2452                        buf_dma += sz_slot_buf_ru;
2453                }
2454        }
2455
2456        s = max_command_entries * sizeof(struct hisi_sas_iost);
2457        hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2458                                             GFP_KERNEL);
2459        if (!hisi_hba->iost)
2460                goto err_out;
2461
2462        s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2463        hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2464                                                   &hisi_hba->breakpoint_dma,
2465                                                   GFP_KERNEL);
2466        if (!hisi_hba->breakpoint)
2467                goto err_out;
2468
2469        hisi_hba->slot_index_count = max_command_entries;
2470        s = hisi_hba->slot_index_count / BITS_PER_BYTE;
2471        hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
2472        if (!hisi_hba->slot_index_tags)
2473                goto err_out;
2474
2475        s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2476        hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2477                                                    &hisi_hba->initial_fis_dma,
2478                                                    GFP_KERNEL);
2479        if (!hisi_hba->initial_fis)
2480                goto err_out;
2481
2482        s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2483        hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2484                                        &hisi_hba->sata_breakpoint_dma,
2485                                        GFP_KERNEL);
2486        if (!hisi_hba->sata_breakpoint)
2487                goto err_out;
2488
2489        hisi_sas_slot_index_init(hisi_hba);
2490        hisi_hba->last_slot_index = HISI_SAS_UNRESERVED_IPTT;
2491
2492        hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2493        if (!hisi_hba->wq) {
2494                dev_err(dev, "sas_alloc: failed to create workqueue\n");
2495                goto err_out;
2496        }
2497
2498        return 0;
2499err_out:
2500        return -ENOMEM;
2501}
2502EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2503
2504void hisi_sas_free(struct hisi_hba *hisi_hba)
2505{
2506        int i;
2507
2508        for (i = 0; i < hisi_hba->n_phy; i++) {
2509                struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2510
2511                del_timer_sync(&phy->timer);
2512        }
2513
2514        if (hisi_hba->wq)
2515                destroy_workqueue(hisi_hba->wq);
2516}
2517EXPORT_SYMBOL_GPL(hisi_sas_free);
2518
2519void hisi_sas_rst_work_handler(struct work_struct *work)
2520{
2521        struct hisi_hba *hisi_hba =
2522                container_of(work, struct hisi_hba, rst_work);
2523
2524        if (hisi_sas_controller_prereset(hisi_hba))
2525                return;
2526
2527        hisi_sas_controller_reset(hisi_hba);
2528}
2529EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2530
2531void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2532{
2533        struct hisi_sas_rst *rst =
2534                container_of(work, struct hisi_sas_rst, work);
2535
2536        if (hisi_sas_controller_prereset(rst->hisi_hba))
2537                goto rst_complete;
2538
2539        if (!hisi_sas_controller_reset(rst->hisi_hba))
2540                rst->done = true;
2541rst_complete:
2542        complete(rst->completion);
2543}
2544EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2545
2546int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2547{
2548        struct device *dev = hisi_hba->dev;
2549        struct platform_device *pdev = hisi_hba->platform_dev;
2550        struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2551        struct clk *refclk;
2552
2553        if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2554                                          SAS_ADDR_SIZE)) {
2555                dev_err(dev, "could not get property sas-addr\n");
2556                return -ENOENT;
2557        }
2558
2559        if (np) {
2560                /*
2561                 * These properties are only required for platform device-based
2562                 * controller with DT firmware.
2563                 */
2564                hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2565                                        "hisilicon,sas-syscon");
2566                if (IS_ERR(hisi_hba->ctrl)) {
2567                        dev_err(dev, "could not get syscon\n");
2568                        return -ENOENT;
2569                }
2570
2571                if (device_property_read_u32(dev, "ctrl-reset-reg",
2572                                             &hisi_hba->ctrl_reset_reg)) {
2573                        dev_err(dev, "could not get property ctrl-reset-reg\n");
2574                        return -ENOENT;
2575                }
2576
2577                if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2578                                             &hisi_hba->ctrl_reset_sts_reg)) {
2579                        dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2580                        return -ENOENT;
2581                }
2582
2583                if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2584                                             &hisi_hba->ctrl_clock_ena_reg)) {
2585                        dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2586                        return -ENOENT;
2587                }
2588        }
2589
2590        refclk = devm_clk_get(dev, NULL);
2591        if (IS_ERR(refclk))
2592                dev_dbg(dev, "no ref clk property\n");
2593        else
2594                hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2595
2596        if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2597                dev_err(dev, "could not get property phy-count\n");
2598                return -ENOENT;
2599        }
2600
2601        if (device_property_read_u32(dev, "queue-count",
2602                                     &hisi_hba->queue_count)) {
2603                dev_err(dev, "could not get property queue-count\n");
2604                return -ENOENT;
2605        }
2606
2607        return 0;
2608}
2609EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2610
2611static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2612                                              const struct hisi_sas_hw *hw)
2613{
2614        struct resource *res;
2615        struct Scsi_Host *shost;
2616        struct hisi_hba *hisi_hba;
2617        struct device *dev = &pdev->dev;
2618        int error;
2619
2620        shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2621        if (!shost) {
2622                dev_err(dev, "scsi host alloc failed\n");
2623                return NULL;
2624        }
2625        hisi_hba = shost_priv(shost);
2626
2627        INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2628        hisi_hba->hw = hw;
2629        hisi_hba->dev = dev;
2630        hisi_hba->platform_dev = pdev;
2631        hisi_hba->shost = shost;
2632        SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2633
2634        timer_setup(&hisi_hba->timer, NULL, 0);
2635
2636        if (hisi_sas_get_fw_info(hisi_hba) < 0)
2637                goto err_out;
2638
2639        error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2640        if (error)
2641                error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
2642
2643        if (error) {
2644                dev_err(dev, "No usable DMA addressing method\n");
2645                goto err_out;
2646        }
2647
2648        hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2649        if (IS_ERR(hisi_hba->regs))
2650                goto err_out;
2651
2652        res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2653        if (res) {
2654                hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2655                if (IS_ERR(hisi_hba->sgpio_regs))
2656                        goto err_out;
2657        }
2658
2659        if (hisi_sas_alloc(hisi_hba)) {
2660                hisi_sas_free(hisi_hba);
2661                goto err_out;
2662        }
2663
2664        return shost;
2665err_out:
2666        scsi_host_put(shost);
2667        dev_err(dev, "shost alloc failed\n");
2668        return NULL;
2669}
2670
2671static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2672{
2673        if (hisi_hba->hw->interrupt_preinit)
2674                return hisi_hba->hw->interrupt_preinit(hisi_hba);
2675        return 0;
2676}
2677
2678int hisi_sas_probe(struct platform_device *pdev,
2679                   const struct hisi_sas_hw *hw)
2680{
2681        struct Scsi_Host *shost;
2682        struct hisi_hba *hisi_hba;
2683        struct device *dev = &pdev->dev;
2684        struct asd_sas_phy **arr_phy;
2685        struct asd_sas_port **arr_port;
2686        struct sas_ha_struct *sha;
2687        int rc, phy_nr, port_nr, i;
2688
2689        shost = hisi_sas_shost_alloc(pdev, hw);
2690        if (!shost)
2691                return -ENOMEM;
2692
2693        sha = SHOST_TO_SAS_HA(shost);
2694        hisi_hba = shost_priv(shost);
2695        platform_set_drvdata(pdev, sha);
2696
2697        phy_nr = port_nr = hisi_hba->n_phy;
2698
2699        arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2700        arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2701        if (!arr_phy || !arr_port) {
2702                rc = -ENOMEM;
2703                goto err_out_ha;
2704        }
2705
2706        sha->sas_phy = arr_phy;
2707        sha->sas_port = arr_port;
2708        sha->lldd_ha = hisi_hba;
2709
2710        shost->transportt = hisi_sas_stt;
2711        shost->max_id = HISI_SAS_MAX_DEVICES;
2712        shost->max_lun = ~0;
2713        shost->max_channel = 1;
2714        shost->max_cmd_len = 16;
2715        if (hisi_hba->hw->slot_index_alloc) {
2716                shost->can_queue = HISI_SAS_MAX_COMMANDS;
2717                shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2718        } else {
2719                shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2720                shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2721        }
2722
2723        sha->sas_ha_name = DRV_NAME;
2724        sha->dev = hisi_hba->dev;
2725        sha->lldd_module = THIS_MODULE;
2726        sha->sas_addr = &hisi_hba->sas_addr[0];
2727        sha->num_phys = hisi_hba->n_phy;
2728        sha->core.shost = hisi_hba->shost;
2729
2730        for (i = 0; i < hisi_hba->n_phy; i++) {
2731                sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2732                sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2733        }
2734
2735        rc = hisi_sas_interrupt_preinit(hisi_hba);
2736        if (rc)
2737                goto err_out_ha;
2738
2739        rc = scsi_add_host(shost, &pdev->dev);
2740        if (rc)
2741                goto err_out_ha;
2742
2743        rc = sas_register_ha(sha);
2744        if (rc)
2745                goto err_out_register_ha;
2746
2747        rc = hisi_hba->hw->hw_init(hisi_hba);
2748        if (rc)
2749                goto err_out_hw_init;
2750
2751        scsi_scan_host(shost);
2752
2753        return 0;
2754
2755err_out_hw_init:
2756        sas_unregister_ha(sha);
2757err_out_register_ha:
2758        scsi_remove_host(shost);
2759err_out_ha:
2760        hisi_sas_free(hisi_hba);
2761        scsi_host_put(shost);
2762        return rc;
2763}
2764EXPORT_SYMBOL_GPL(hisi_sas_probe);
2765
2766int hisi_sas_remove(struct platform_device *pdev)
2767{
2768        struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2769        struct hisi_hba *hisi_hba = sha->lldd_ha;
2770        struct Scsi_Host *shost = sha->core.shost;
2771
2772        if (timer_pending(&hisi_hba->timer))
2773                del_timer(&hisi_hba->timer);
2774
2775        sas_unregister_ha(sha);
2776        sas_remove_host(sha->core.shost);
2777
2778        hisi_sas_free(hisi_hba);
2779        scsi_host_put(shost);
2780        return 0;
2781}
2782EXPORT_SYMBOL_GPL(hisi_sas_remove);
2783
2784#if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2785#define DEBUGFS_ENABLE_DEFAULT  "enabled"
2786bool hisi_sas_debugfs_enable = true;
2787u32 hisi_sas_debugfs_dump_count = 50;
2788#else
2789#define DEBUGFS_ENABLE_DEFAULT "disabled"
2790bool hisi_sas_debugfs_enable;
2791u32 hisi_sas_debugfs_dump_count = 1;
2792#endif
2793
2794EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2795module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2796MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2797                 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2798
2799EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2800module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2801MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2802
2803struct dentry *hisi_sas_debugfs_dir;
2804EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2805
2806static __init int hisi_sas_init(void)
2807{
2808        hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2809        if (!hisi_sas_stt)
2810                return -ENOMEM;
2811
2812        if (hisi_sas_debugfs_enable) {
2813                hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2814                if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2815                        pr_info("hisi_sas: Limiting debugfs dump count\n");
2816                        hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2817                }
2818        }
2819
2820        return 0;
2821}
2822
2823static __exit void hisi_sas_exit(void)
2824{
2825        sas_release_transport(hisi_sas_stt);
2826
2827        debugfs_remove(hisi_sas_debugfs_dir);
2828}
2829
2830module_init(hisi_sas_init);
2831module_exit(hisi_sas_exit);
2832
2833MODULE_LICENSE("GPL");
2834MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2835MODULE_DESCRIPTION("HISILICON SAS controller driver");
2836MODULE_ALIAS("platform:" DRV_NAME);
2837