1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2015 Linaro Ltd. 4 * Copyright (c) 2015 Hisilicon Limited. 5 */ 6 7 #include "hisi_sas.h" 8 #define DRV_NAME "hisi_sas" 9 10 #define DEV_IS_GONE(dev) \ 11 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED)) 12 13 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device, 14 u8 *lun, struct hisi_sas_tmf_task *tmf); 15 static int 16 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba, 17 struct domain_device *device, 18 int abort_flag, int tag); 19 static int hisi_sas_softreset_ata_disk(struct domain_device *device); 20 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func, 21 void *funcdata); 22 static void hisi_sas_release_task(struct hisi_hba *hisi_hba, 23 struct domain_device *device); 24 static void hisi_sas_dev_gone(struct domain_device *device); 25 26 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction) 27 { 28 switch (fis->command) { 29 case ATA_CMD_FPDMA_WRITE: 30 case ATA_CMD_FPDMA_READ: 31 case ATA_CMD_FPDMA_RECV: 32 case ATA_CMD_FPDMA_SEND: 33 case ATA_CMD_NCQ_NON_DATA: 34 return HISI_SAS_SATA_PROTOCOL_FPDMA; 35 36 case ATA_CMD_DOWNLOAD_MICRO: 37 case ATA_CMD_ID_ATA: 38 case ATA_CMD_PMP_READ: 39 case ATA_CMD_READ_LOG_EXT: 40 case ATA_CMD_PIO_READ: 41 case ATA_CMD_PIO_READ_EXT: 42 case ATA_CMD_PMP_WRITE: 43 case ATA_CMD_WRITE_LOG_EXT: 44 case ATA_CMD_PIO_WRITE: 45 case ATA_CMD_PIO_WRITE_EXT: 46 return HISI_SAS_SATA_PROTOCOL_PIO; 47 48 case ATA_CMD_DSM: 49 case ATA_CMD_DOWNLOAD_MICRO_DMA: 50 case ATA_CMD_PMP_READ_DMA: 51 case ATA_CMD_PMP_WRITE_DMA: 52 case ATA_CMD_READ: 53 case ATA_CMD_READ_EXT: 54 case ATA_CMD_READ_LOG_DMA_EXT: 55 case ATA_CMD_READ_STREAM_DMA_EXT: 56 case ATA_CMD_TRUSTED_RCV_DMA: 57 case ATA_CMD_TRUSTED_SND_DMA: 58 case ATA_CMD_WRITE: 59 case ATA_CMD_WRITE_EXT: 60 case ATA_CMD_WRITE_FUA_EXT: 61 case ATA_CMD_WRITE_QUEUED: 62 case ATA_CMD_WRITE_LOG_DMA_EXT: 63 case ATA_CMD_WRITE_STREAM_DMA_EXT: 64 case ATA_CMD_ZAC_MGMT_IN: 65 return HISI_SAS_SATA_PROTOCOL_DMA; 66 67 case ATA_CMD_CHK_POWER: 68 case ATA_CMD_DEV_RESET: 69 case ATA_CMD_EDD: 70 case ATA_CMD_FLUSH: 71 case ATA_CMD_FLUSH_EXT: 72 case ATA_CMD_VERIFY: 73 case ATA_CMD_VERIFY_EXT: 74 case ATA_CMD_SET_FEATURES: 75 case ATA_CMD_STANDBY: 76 case ATA_CMD_STANDBYNOW1: 77 case ATA_CMD_ZAC_MGMT_OUT: 78 return HISI_SAS_SATA_PROTOCOL_NONDATA; 79 80 case ATA_CMD_SET_MAX: 81 switch (fis->features) { 82 case ATA_SET_MAX_PASSWD: 83 case ATA_SET_MAX_LOCK: 84 return HISI_SAS_SATA_PROTOCOL_PIO; 85 86 case ATA_SET_MAX_PASSWD_DMA: 87 case ATA_SET_MAX_UNLOCK_DMA: 88 return HISI_SAS_SATA_PROTOCOL_DMA; 89 90 default: 91 return HISI_SAS_SATA_PROTOCOL_NONDATA; 92 } 93 94 default: 95 { 96 if (direction == DMA_NONE) 97 return HISI_SAS_SATA_PROTOCOL_NONDATA; 98 return HISI_SAS_SATA_PROTOCOL_PIO; 99 } 100 } 101 } 102 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol); 103 104 void hisi_sas_sata_done(struct sas_task *task, 105 struct hisi_sas_slot *slot) 106 { 107 struct task_status_struct *ts = &task->task_status; 108 struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf; 109 struct hisi_sas_status_buffer *status_buf = 110 hisi_sas_status_buf_addr_mem(slot); 111 u8 *iu = &status_buf->iu[0]; 112 struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu; 113 114 resp->frame_len = sizeof(struct dev_to_host_fis); 115 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis)); 116 117 ts->buf_valid_size = sizeof(*resp); 118 } 119 EXPORT_SYMBOL_GPL(hisi_sas_sata_done); 120 121 /* 122 * This function assumes linkrate mask fits in 8 bits, which it 123 * does for all HW versions supported. 124 */ 125 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max) 126 { 127 u8 rate = 0; 128 int i; 129 130 max -= SAS_LINK_RATE_1_5_GBPS; 131 for (i = 0; i <= max; i++) 132 rate |= 1 << (i * 2); 133 return rate; 134 } 135 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask); 136 137 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device) 138 { 139 return device->port->ha->lldd_ha; 140 } 141 142 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port) 143 { 144 return container_of(sas_port, struct hisi_sas_port, sas_port); 145 } 146 EXPORT_SYMBOL_GPL(to_hisi_sas_port); 147 148 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba) 149 { 150 int phy_no; 151 152 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) 153 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 154 } 155 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys); 156 157 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx) 158 { 159 void *bitmap = hisi_hba->slot_index_tags; 160 161 clear_bit(slot_idx, bitmap); 162 } 163 164 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx) 165 { 166 if (hisi_hba->hw->slot_index_alloc || 167 slot_idx >= HISI_SAS_UNRESERVED_IPTT) { 168 spin_lock(&hisi_hba->lock); 169 hisi_sas_slot_index_clear(hisi_hba, slot_idx); 170 spin_unlock(&hisi_hba->lock); 171 } 172 } 173 174 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx) 175 { 176 void *bitmap = hisi_hba->slot_index_tags; 177 178 set_bit(slot_idx, bitmap); 179 } 180 181 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, 182 struct scsi_cmnd *scsi_cmnd) 183 { 184 int index; 185 void *bitmap = hisi_hba->slot_index_tags; 186 187 if (scsi_cmnd) 188 return scsi_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 } 208 209 static 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 } 216 217 void 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 } 255 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free); 256 257 static 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 } 262 263 static 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 } 268 269 static 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 } 274 275 static 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 } 282 283 static 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 } 302 303 static 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; 344 345 err_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); 349 prep_out: 350 return rc; 351 } 352 353 static 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 } 367 368 static 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; 399 400 err_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 } 405 406 static 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; 551 552 err_out_dif_dma_unmap: 553 if (!sas_protocol_ata(task->task_proto)) 554 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif); 555 err_out_dma_unmap: 556 hisi_sas_dma_unmap(hisi_hba, task, n_elem, 557 n_elem_req); 558 prep_out: 559 dev_err(dev, "task prep: failed[%d]!\n", rc); 560 return rc; 561 } 562 563 static 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 } 612 613 static 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 } 658 659 static 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 3 693 static 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 } 758 759 static 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; 810 811 err_out: 812 hisi_sas_dev_gone(device); 813 return rc; 814 } 815 816 int 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 } 828 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure); 829 830 void 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 } 836 EXPORT_SYMBOL_GPL(hisi_sas_scan_start); 837 838 int 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 } 850 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished); 851 852 static 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 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP) 861 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no); 862 hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL); 863 } 864 865 static void hisi_sas_linkreset_work(struct work_struct *work) 866 { 867 struct hisi_sas_phy *phy = 868 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]); 869 struct asd_sas_phy *sas_phy = &phy->sas_phy; 870 871 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL); 872 } 873 874 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = { 875 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work, 876 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work, 877 }; 878 879 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy, 880 enum hisi_sas_phy_event event) 881 { 882 struct hisi_hba *hisi_hba = phy->hisi_hba; 883 884 if (WARN_ON(event >= HISI_PHYES_NUM)) 885 return false; 886 887 return queue_work(hisi_hba->wq, &phy->works[event]); 888 } 889 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event); 890 891 static void hisi_sas_wait_phyup_timedout(struct timer_list *t) 892 { 893 struct hisi_sas_phy *phy = from_timer(phy, t, timer); 894 struct hisi_hba *hisi_hba = phy->hisi_hba; 895 struct device *dev = hisi_hba->dev; 896 int phy_no = phy->sas_phy.id; 897 898 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no); 899 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET); 900 } 901 902 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no) 903 { 904 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 905 struct device *dev = hisi_hba->dev; 906 907 dev_dbg(dev, "phy%d OOB ready\n", phy_no); 908 if (phy->phy_attached) 909 return; 910 911 if (!timer_pending(&phy->timer)) { 912 phy->timer.expires = jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT * HZ; 913 add_timer(&phy->timer); 914 } 915 } 916 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready); 917 918 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no) 919 { 920 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 921 struct asd_sas_phy *sas_phy = &phy->sas_phy; 922 int i; 923 924 phy->hisi_hba = hisi_hba; 925 phy->port = NULL; 926 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS; 927 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate(); 928 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0; 929 sas_phy->class = SAS; 930 sas_phy->iproto = SAS_PROTOCOL_ALL; 931 sas_phy->tproto = 0; 932 sas_phy->type = PHY_TYPE_PHYSICAL; 933 sas_phy->role = PHY_ROLE_INITIATOR; 934 sas_phy->oob_mode = OOB_NOT_CONNECTED; 935 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN; 936 sas_phy->id = phy_no; 937 sas_phy->sas_addr = &hisi_hba->sas_addr[0]; 938 sas_phy->frame_rcvd = &phy->frame_rcvd[0]; 939 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata; 940 sas_phy->lldd_phy = phy; 941 942 for (i = 0; i < HISI_PHYES_NUM; i++) 943 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]); 944 945 spin_lock_init(&phy->lock); 946 947 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0); 948 } 949 950 /* Wrapper to ensure we track hisi_sas_phy.enable properly */ 951 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable) 952 { 953 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 954 struct asd_sas_phy *aphy = &phy->sas_phy; 955 struct sas_phy *sphy = aphy->phy; 956 unsigned long flags; 957 958 spin_lock_irqsave(&phy->lock, flags); 959 960 if (enable) { 961 /* We may have been enabled already; if so, don't touch */ 962 if (!phy->enable) 963 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; 964 hisi_hba->hw->phy_start(hisi_hba, phy_no); 965 } else { 966 sphy->negotiated_linkrate = SAS_PHY_DISABLED; 967 hisi_hba->hw->phy_disable(hisi_hba, phy_no); 968 } 969 phy->enable = enable; 970 spin_unlock_irqrestore(&phy->lock, flags); 971 } 972 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable); 973 974 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy) 975 { 976 struct sas_ha_struct *sas_ha = sas_phy->ha; 977 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 978 struct hisi_sas_phy *phy = sas_phy->lldd_phy; 979 struct asd_sas_port *sas_port = sas_phy->port; 980 struct hisi_sas_port *port; 981 unsigned long flags; 982 983 if (!sas_port) 984 return; 985 986 port = to_hisi_sas_port(sas_port); 987 spin_lock_irqsave(&hisi_hba->lock, flags); 988 port->port_attached = 1; 989 port->id = phy->port_id; 990 phy->port = port; 991 sas_port->lldd_port = port; 992 spin_unlock_irqrestore(&hisi_hba->lock, flags); 993 } 994 995 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task, 996 struct hisi_sas_slot *slot) 997 { 998 if (task) { 999 unsigned long flags; 1000 struct task_status_struct *ts; 1001 1002 ts = &task->task_status; 1003 1004 ts->resp = SAS_TASK_COMPLETE; 1005 ts->stat = SAS_ABORTED_TASK; 1006 spin_lock_irqsave(&task->task_state_lock, flags); 1007 task->task_state_flags &= 1008 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR); 1009 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP) 1010 task->task_state_flags |= SAS_TASK_STATE_DONE; 1011 spin_unlock_irqrestore(&task->task_state_lock, flags); 1012 } 1013 1014 hisi_sas_slot_task_free(hisi_hba, task, slot); 1015 } 1016 1017 static void hisi_sas_release_task(struct hisi_hba *hisi_hba, 1018 struct domain_device *device) 1019 { 1020 struct hisi_sas_slot *slot, *slot2; 1021 struct hisi_sas_device *sas_dev = device->lldd_dev; 1022 1023 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry) 1024 hisi_sas_do_release_task(hisi_hba, slot->task, slot); 1025 } 1026 1027 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba) 1028 { 1029 struct hisi_sas_device *sas_dev; 1030 struct domain_device *device; 1031 int i; 1032 1033 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1034 sas_dev = &hisi_hba->devices[i]; 1035 device = sas_dev->sas_device; 1036 1037 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || 1038 !device) 1039 continue; 1040 1041 hisi_sas_release_task(hisi_hba, device); 1042 } 1043 } 1044 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks); 1045 1046 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba, 1047 struct domain_device *device) 1048 { 1049 if (hisi_hba->hw->dereg_device) 1050 hisi_hba->hw->dereg_device(hisi_hba, device); 1051 } 1052 1053 static void hisi_sas_dev_gone(struct domain_device *device) 1054 { 1055 struct hisi_sas_device *sas_dev = device->lldd_dev; 1056 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1057 struct device *dev = hisi_hba->dev; 1058 int ret = 0; 1059 1060 dev_info(dev, "dev[%d:%x] is gone\n", 1061 sas_dev->device_id, sas_dev->dev_type); 1062 1063 down(&hisi_hba->sem); 1064 if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) { 1065 hisi_sas_internal_task_abort(hisi_hba, device, 1066 HISI_SAS_INT_ABT_DEV, 0); 1067 1068 hisi_sas_dereg_device(hisi_hba, device); 1069 1070 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev); 1071 device->lldd_dev = NULL; 1072 } 1073 1074 if (hisi_hba->hw->free_device) 1075 hisi_hba->hw->free_device(sas_dev); 1076 1077 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */ 1078 if (!ret) 1079 sas_dev->dev_type = SAS_PHY_UNUSED; 1080 sas_dev->sas_device = NULL; 1081 up(&hisi_hba->sem); 1082 } 1083 1084 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) 1085 { 1086 return hisi_sas_task_exec(task, gfp_flags, 0, NULL); 1087 } 1088 1089 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no, 1090 struct sas_phy_linkrates *r) 1091 { 1092 struct sas_phy_linkrates _r; 1093 1094 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1095 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1096 enum sas_linkrate min, max; 1097 1098 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS) 1099 return -EINVAL; 1100 1101 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) { 1102 max = sas_phy->phy->maximum_linkrate; 1103 min = r->minimum_linkrate; 1104 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) { 1105 max = r->maximum_linkrate; 1106 min = sas_phy->phy->minimum_linkrate; 1107 } else 1108 return -EINVAL; 1109 1110 _r.maximum_linkrate = max; 1111 _r.minimum_linkrate = min; 1112 1113 sas_phy->phy->maximum_linkrate = max; 1114 sas_phy->phy->minimum_linkrate = min; 1115 1116 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 1117 msleep(100); 1118 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r); 1119 hisi_sas_phy_enable(hisi_hba, phy_no, 1); 1120 1121 return 0; 1122 } 1123 1124 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func, 1125 void *funcdata) 1126 { 1127 struct sas_ha_struct *sas_ha = sas_phy->ha; 1128 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 1129 int phy_no = sas_phy->id; 1130 1131 switch (func) { 1132 case PHY_FUNC_HARD_RESET: 1133 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no); 1134 break; 1135 1136 case PHY_FUNC_LINK_RESET: 1137 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 1138 msleep(100); 1139 hisi_sas_phy_enable(hisi_hba, phy_no, 1); 1140 break; 1141 1142 case PHY_FUNC_DISABLE: 1143 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 1144 break; 1145 1146 case PHY_FUNC_SET_LINK_RATE: 1147 return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata); 1148 case PHY_FUNC_GET_EVENTS: 1149 if (hisi_hba->hw->get_events) { 1150 hisi_hba->hw->get_events(hisi_hba, phy_no); 1151 break; 1152 } 1153 fallthrough; 1154 case PHY_FUNC_RELEASE_SPINUP_HOLD: 1155 default: 1156 return -EOPNOTSUPP; 1157 } 1158 return 0; 1159 } 1160 1161 static void hisi_sas_task_done(struct sas_task *task) 1162 { 1163 del_timer(&task->slow_task->timer); 1164 complete(&task->slow_task->completion); 1165 } 1166 1167 static void hisi_sas_tmf_timedout(struct timer_list *t) 1168 { 1169 struct sas_task_slow *slow = from_timer(slow, t, timer); 1170 struct sas_task *task = slow->task; 1171 unsigned long flags; 1172 bool is_completed = true; 1173 1174 spin_lock_irqsave(&task->task_state_lock, flags); 1175 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { 1176 task->task_state_flags |= SAS_TASK_STATE_ABORTED; 1177 is_completed = false; 1178 } 1179 spin_unlock_irqrestore(&task->task_state_lock, flags); 1180 1181 if (!is_completed) 1182 complete(&task->slow_task->completion); 1183 } 1184 1185 #define TASK_TIMEOUT 20 1186 #define TASK_RETRY 3 1187 #define INTERNAL_ABORT_TIMEOUT 6 1188 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device, 1189 void *parameter, u32 para_len, 1190 struct hisi_sas_tmf_task *tmf) 1191 { 1192 struct hisi_sas_device *sas_dev = device->lldd_dev; 1193 struct hisi_hba *hisi_hba = sas_dev->hisi_hba; 1194 struct device *dev = hisi_hba->dev; 1195 struct sas_task *task; 1196 int res, retry; 1197 1198 for (retry = 0; retry < TASK_RETRY; retry++) { 1199 task = sas_alloc_slow_task(GFP_KERNEL); 1200 if (!task) 1201 return -ENOMEM; 1202 1203 task->dev = device; 1204 task->task_proto = device->tproto; 1205 1206 if (dev_is_sata(device)) { 1207 task->ata_task.device_control_reg_update = 1; 1208 memcpy(&task->ata_task.fis, parameter, para_len); 1209 } else { 1210 memcpy(&task->ssp_task, parameter, para_len); 1211 } 1212 task->task_done = hisi_sas_task_done; 1213 1214 task->slow_task->timer.function = hisi_sas_tmf_timedout; 1215 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT * HZ; 1216 add_timer(&task->slow_task->timer); 1217 1218 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf); 1219 1220 if (res) { 1221 del_timer(&task->slow_task->timer); 1222 dev_err(dev, "abort tmf: executing internal task failed: %d\n", 1223 res); 1224 goto ex_err; 1225 } 1226 1227 wait_for_completion(&task->slow_task->completion); 1228 res = TMF_RESP_FUNC_FAILED; 1229 /* Even TMF timed out, return direct. */ 1230 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { 1231 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { 1232 struct hisi_sas_slot *slot = task->lldd_task; 1233 1234 dev_err(dev, "abort tmf: TMF task timeout and not done\n"); 1235 if (slot) { 1236 struct hisi_sas_cq *cq = 1237 &hisi_hba->cq[slot->dlvry_queue]; 1238 /* 1239 * sync irq to avoid free'ing task 1240 * before using task in IO completion 1241 */ 1242 synchronize_irq(cq->irq_no); 1243 slot->task = NULL; 1244 } 1245 1246 goto ex_err; 1247 } else 1248 dev_err(dev, "abort tmf: TMF task timeout\n"); 1249 } 1250 1251 if (task->task_status.resp == SAS_TASK_COMPLETE && 1252 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) { 1253 res = TMF_RESP_FUNC_COMPLETE; 1254 break; 1255 } 1256 1257 if (task->task_status.resp == SAS_TASK_COMPLETE && 1258 task->task_status.stat == TMF_RESP_FUNC_SUCC) { 1259 res = TMF_RESP_FUNC_SUCC; 1260 break; 1261 } 1262 1263 if (task->task_status.resp == SAS_TASK_COMPLETE && 1264 task->task_status.stat == SAS_DATA_UNDERRUN) { 1265 /* no error, but return the number of bytes of 1266 * underrun 1267 */ 1268 dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x sts 0x%x underrun\n", 1269 SAS_ADDR(device->sas_addr), 1270 task->task_status.resp, 1271 task->task_status.stat); 1272 res = task->task_status.residual; 1273 break; 1274 } 1275 1276 if (task->task_status.resp == SAS_TASK_COMPLETE && 1277 task->task_status.stat == SAS_DATA_OVERRUN) { 1278 dev_warn(dev, "abort tmf: blocked task error\n"); 1279 res = -EMSGSIZE; 1280 break; 1281 } 1282 1283 if (task->task_status.resp == SAS_TASK_COMPLETE && 1284 task->task_status.stat == SAS_OPEN_REJECT) { 1285 dev_warn(dev, "abort tmf: open reject failed\n"); 1286 res = -EIO; 1287 } else { 1288 dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x status 0x%x\n", 1289 SAS_ADDR(device->sas_addr), 1290 task->task_status.resp, 1291 task->task_status.stat); 1292 } 1293 sas_free_task(task); 1294 task = NULL; 1295 } 1296 ex_err: 1297 if (retry == TASK_RETRY) 1298 dev_warn(dev, "abort tmf: executing internal task failed!\n"); 1299 sas_free_task(task); 1300 return res; 1301 } 1302 1303 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev, 1304 bool reset, int pmp, u8 *fis) 1305 { 1306 struct ata_taskfile tf; 1307 1308 ata_tf_init(dev, &tf); 1309 if (reset) 1310 tf.ctl |= ATA_SRST; 1311 else 1312 tf.ctl &= ~ATA_SRST; 1313 tf.command = ATA_CMD_DEV_RESET; 1314 ata_tf_to_fis(&tf, pmp, 0, fis); 1315 } 1316 1317 static int hisi_sas_softreset_ata_disk(struct domain_device *device) 1318 { 1319 u8 fis[20] = {0}; 1320 struct ata_port *ap = device->sata_dev.ap; 1321 struct ata_link *link; 1322 int rc = TMF_RESP_FUNC_FAILED; 1323 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1324 struct device *dev = hisi_hba->dev; 1325 int s = sizeof(struct host_to_dev_fis); 1326 1327 ata_for_each_link(link, ap, EDGE) { 1328 int pmp = sata_srst_pmp(link); 1329 1330 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis); 1331 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL); 1332 if (rc != TMF_RESP_FUNC_COMPLETE) 1333 break; 1334 } 1335 1336 if (rc == TMF_RESP_FUNC_COMPLETE) { 1337 ata_for_each_link(link, ap, EDGE) { 1338 int pmp = sata_srst_pmp(link); 1339 1340 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis); 1341 rc = hisi_sas_exec_internal_tmf_task(device, fis, 1342 s, NULL); 1343 if (rc != TMF_RESP_FUNC_COMPLETE) 1344 dev_err(dev, "ata disk %016llx de-reset failed\n", 1345 SAS_ADDR(device->sas_addr)); 1346 } 1347 } else { 1348 dev_err(dev, "ata disk %016llx reset failed\n", 1349 SAS_ADDR(device->sas_addr)); 1350 } 1351 1352 if (rc == TMF_RESP_FUNC_COMPLETE) 1353 hisi_sas_release_task(hisi_hba, device); 1354 1355 return rc; 1356 } 1357 1358 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device, 1359 u8 *lun, struct hisi_sas_tmf_task *tmf) 1360 { 1361 struct sas_ssp_task ssp_task; 1362 1363 if (!(device->tproto & SAS_PROTOCOL_SSP)) 1364 return TMF_RESP_FUNC_ESUPP; 1365 1366 memcpy(ssp_task.LUN, lun, 8); 1367 1368 return hisi_sas_exec_internal_tmf_task(device, &ssp_task, 1369 sizeof(ssp_task), tmf); 1370 } 1371 1372 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba) 1373 { 1374 u32 state = hisi_hba->hw->get_phys_state(hisi_hba); 1375 int i; 1376 1377 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1378 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1379 struct domain_device *device = sas_dev->sas_device; 1380 struct asd_sas_port *sas_port; 1381 struct hisi_sas_port *port; 1382 struct hisi_sas_phy *phy = NULL; 1383 struct asd_sas_phy *sas_phy; 1384 1385 if ((sas_dev->dev_type == SAS_PHY_UNUSED) 1386 || !device || !device->port) 1387 continue; 1388 1389 sas_port = device->port; 1390 port = to_hisi_sas_port(sas_port); 1391 1392 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) 1393 if (state & BIT(sas_phy->id)) { 1394 phy = sas_phy->lldd_phy; 1395 break; 1396 } 1397 1398 if (phy) { 1399 port->id = phy->port_id; 1400 1401 /* Update linkrate of directly attached device. */ 1402 if (!device->parent) 1403 device->linkrate = phy->sas_phy.linkrate; 1404 1405 hisi_hba->hw->setup_itct(hisi_hba, sas_dev); 1406 } else 1407 port->id = 0xff; 1408 } 1409 } 1410 1411 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state) 1412 { 1413 struct asd_sas_port *_sas_port = NULL; 1414 int phy_no; 1415 1416 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) { 1417 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1418 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1419 struct asd_sas_port *sas_port = sas_phy->port; 1420 bool do_port_check = _sas_port != sas_port; 1421 1422 if (!sas_phy->phy->enabled) 1423 continue; 1424 1425 /* Report PHY state change to libsas */ 1426 if (state & BIT(phy_no)) { 1427 if (do_port_check && sas_port && sas_port->port_dev) { 1428 struct domain_device *dev = sas_port->port_dev; 1429 1430 _sas_port = sas_port; 1431 1432 if (dev_is_expander(dev->dev_type)) 1433 sas_notify_port_event(sas_phy, 1434 PORTE_BROADCAST_RCVD, 1435 GFP_KERNEL); 1436 } 1437 } else { 1438 hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL); 1439 } 1440 } 1441 } 1442 1443 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba) 1444 { 1445 struct hisi_sas_device *sas_dev; 1446 struct domain_device *device; 1447 int i; 1448 1449 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1450 sas_dev = &hisi_hba->devices[i]; 1451 device = sas_dev->sas_device; 1452 1453 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device) 1454 continue; 1455 1456 hisi_sas_init_device(device); 1457 } 1458 } 1459 1460 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba, 1461 struct asd_sas_port *sas_port, 1462 struct domain_device *device) 1463 { 1464 struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 }; 1465 struct ata_port *ap = device->sata_dev.ap; 1466 struct device *dev = hisi_hba->dev; 1467 int s = sizeof(struct host_to_dev_fis); 1468 int rc = TMF_RESP_FUNC_FAILED; 1469 struct asd_sas_phy *sas_phy; 1470 struct ata_link *link; 1471 u8 fis[20] = {0}; 1472 u32 state; 1473 1474 state = hisi_hba->hw->get_phys_state(hisi_hba); 1475 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) { 1476 if (!(state & BIT(sas_phy->id))) 1477 continue; 1478 1479 ata_for_each_link(link, ap, EDGE) { 1480 int pmp = sata_srst_pmp(link); 1481 1482 tmf_task.phy_id = sas_phy->id; 1483 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis); 1484 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, 1485 &tmf_task); 1486 if (rc != TMF_RESP_FUNC_COMPLETE) { 1487 dev_err(dev, "phy%d ata reset failed rc=%d\n", 1488 sas_phy->id, rc); 1489 break; 1490 } 1491 } 1492 } 1493 } 1494 1495 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba) 1496 { 1497 struct device *dev = hisi_hba->dev; 1498 int port_no, rc, i; 1499 1500 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1501 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1502 struct domain_device *device = sas_dev->sas_device; 1503 1504 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device) 1505 continue; 1506 1507 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1508 HISI_SAS_INT_ABT_DEV, 0); 1509 if (rc < 0) 1510 dev_err(dev, "STP reject: abort dev failed %d\n", rc); 1511 } 1512 1513 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) { 1514 struct hisi_sas_port *port = &hisi_hba->port[port_no]; 1515 struct asd_sas_port *sas_port = &port->sas_port; 1516 struct domain_device *port_dev = sas_port->port_dev; 1517 struct domain_device *device; 1518 1519 if (!port_dev || !dev_is_expander(port_dev->dev_type)) 1520 continue; 1521 1522 /* Try to find a SATA device */ 1523 list_for_each_entry(device, &sas_port->dev_list, 1524 dev_list_node) { 1525 if (dev_is_sata(device)) { 1526 hisi_sas_send_ata_reset_each_phy(hisi_hba, 1527 sas_port, 1528 device); 1529 break; 1530 } 1531 } 1532 } 1533 } 1534 1535 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba) 1536 { 1537 struct Scsi_Host *shost = hisi_hba->shost; 1538 1539 down(&hisi_hba->sem); 1540 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba); 1541 1542 scsi_block_requests(shost); 1543 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000); 1544 1545 if (timer_pending(&hisi_hba->timer)) 1546 del_timer_sync(&hisi_hba->timer); 1547 1548 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); 1549 } 1550 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare); 1551 1552 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba) 1553 { 1554 struct Scsi_Host *shost = hisi_hba->shost; 1555 1556 /* Init and wait for PHYs to come up and all libsas event finished. */ 1557 hisi_hba->hw->phys_init(hisi_hba); 1558 msleep(1000); 1559 hisi_sas_refresh_port_id(hisi_hba); 1560 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); 1561 1562 if (hisi_hba->reject_stp_links_msk) 1563 hisi_sas_terminate_stp_reject(hisi_hba); 1564 hisi_sas_reset_init_all_devices(hisi_hba); 1565 up(&hisi_hba->sem); 1566 scsi_unblock_requests(shost); 1567 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags); 1568 1569 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state); 1570 } 1571 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done); 1572 1573 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba) 1574 { 1575 if (!hisi_hba->hw->soft_reset) 1576 return -1; 1577 1578 if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) 1579 return -1; 1580 1581 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct) 1582 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba); 1583 1584 return 0; 1585 } 1586 1587 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba) 1588 { 1589 struct device *dev = hisi_hba->dev; 1590 struct Scsi_Host *shost = hisi_hba->shost; 1591 int rc; 1592 1593 dev_info(dev, "controller resetting...\n"); 1594 hisi_sas_controller_reset_prepare(hisi_hba); 1595 1596 rc = hisi_hba->hw->soft_reset(hisi_hba); 1597 if (rc) { 1598 dev_warn(dev, "controller reset failed (%d)\n", rc); 1599 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); 1600 up(&hisi_hba->sem); 1601 scsi_unblock_requests(shost); 1602 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags); 1603 return rc; 1604 } 1605 1606 hisi_sas_controller_reset_done(hisi_hba); 1607 dev_info(dev, "controller reset complete\n"); 1608 1609 return 0; 1610 } 1611 1612 static int hisi_sas_abort_task(struct sas_task *task) 1613 { 1614 struct scsi_lun lun; 1615 struct hisi_sas_tmf_task tmf_task; 1616 struct domain_device *device = task->dev; 1617 struct hisi_sas_device *sas_dev = device->lldd_dev; 1618 struct hisi_hba *hisi_hba; 1619 struct device *dev; 1620 int rc = TMF_RESP_FUNC_FAILED; 1621 unsigned long flags; 1622 1623 if (!sas_dev) 1624 return TMF_RESP_FUNC_FAILED; 1625 1626 hisi_hba = dev_to_hisi_hba(task->dev); 1627 dev = hisi_hba->dev; 1628 1629 spin_lock_irqsave(&task->task_state_lock, flags); 1630 if (task->task_state_flags & SAS_TASK_STATE_DONE) { 1631 struct hisi_sas_slot *slot = task->lldd_task; 1632 struct hisi_sas_cq *cq; 1633 1634 if (slot) { 1635 /* 1636 * sync irq to avoid free'ing task 1637 * before using task in IO completion 1638 */ 1639 cq = &hisi_hba->cq[slot->dlvry_queue]; 1640 synchronize_irq(cq->irq_no); 1641 } 1642 spin_unlock_irqrestore(&task->task_state_lock, flags); 1643 rc = TMF_RESP_FUNC_COMPLETE; 1644 goto out; 1645 } 1646 task->task_state_flags |= SAS_TASK_STATE_ABORTED; 1647 spin_unlock_irqrestore(&task->task_state_lock, flags); 1648 1649 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { 1650 struct scsi_cmnd *cmnd = task->uldd_task; 1651 struct hisi_sas_slot *slot = task->lldd_task; 1652 u16 tag = slot->idx; 1653 int rc2; 1654 1655 int_to_scsilun(cmnd->device->lun, &lun); 1656 tmf_task.tmf = TMF_ABORT_TASK; 1657 tmf_task.tag_of_task_to_be_managed = tag; 1658 1659 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, 1660 &tmf_task); 1661 1662 rc2 = hisi_sas_internal_task_abort(hisi_hba, device, 1663 HISI_SAS_INT_ABT_CMD, tag); 1664 if (rc2 < 0) { 1665 dev_err(dev, "abort task: internal abort (%d)\n", rc2); 1666 return TMF_RESP_FUNC_FAILED; 1667 } 1668 1669 /* 1670 * If the TMF finds that the IO is not in the device and also 1671 * the internal abort does not succeed, then it is safe to 1672 * free the slot. 1673 * Note: if the internal abort succeeds then the slot 1674 * will have already been completed 1675 */ 1676 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) { 1677 if (task->lldd_task) 1678 hisi_sas_do_release_task(hisi_hba, task, slot); 1679 } 1680 } else if (task->task_proto & SAS_PROTOCOL_SATA || 1681 task->task_proto & SAS_PROTOCOL_STP) { 1682 if (task->dev->dev_type == SAS_SATA_DEV) { 1683 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1684 HISI_SAS_INT_ABT_DEV, 1685 0); 1686 if (rc < 0) { 1687 dev_err(dev, "abort task: internal abort failed\n"); 1688 goto out; 1689 } 1690 hisi_sas_dereg_device(hisi_hba, device); 1691 rc = hisi_sas_softreset_ata_disk(device); 1692 } 1693 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) { 1694 /* SMP */ 1695 struct hisi_sas_slot *slot = task->lldd_task; 1696 u32 tag = slot->idx; 1697 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue]; 1698 1699 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1700 HISI_SAS_INT_ABT_CMD, tag); 1701 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) && 1702 task->lldd_task) { 1703 /* 1704 * sync irq to avoid free'ing task 1705 * before using task in IO completion 1706 */ 1707 synchronize_irq(cq->irq_no); 1708 slot->task = NULL; 1709 } 1710 } 1711 1712 out: 1713 if (rc != TMF_RESP_FUNC_COMPLETE) 1714 dev_notice(dev, "abort task: rc=%d\n", rc); 1715 return rc; 1716 } 1717 1718 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun) 1719 { 1720 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1721 struct device *dev = hisi_hba->dev; 1722 struct hisi_sas_tmf_task tmf_task; 1723 int rc; 1724 1725 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1726 HISI_SAS_INT_ABT_DEV, 0); 1727 if (rc < 0) { 1728 dev_err(dev, "abort task set: internal abort rc=%d\n", rc); 1729 return TMF_RESP_FUNC_FAILED; 1730 } 1731 hisi_sas_dereg_device(hisi_hba, device); 1732 1733 tmf_task.tmf = TMF_ABORT_TASK_SET; 1734 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 1735 1736 if (rc == TMF_RESP_FUNC_COMPLETE) 1737 hisi_sas_release_task(hisi_hba, device); 1738 1739 return rc; 1740 } 1741 1742 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun) 1743 { 1744 struct hisi_sas_tmf_task tmf_task; 1745 int rc; 1746 1747 tmf_task.tmf = TMF_CLEAR_ACA; 1748 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 1749 1750 return rc; 1751 } 1752 1753 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device) 1754 { 1755 struct sas_phy *local_phy = sas_get_local_phy(device); 1756 struct hisi_sas_device *sas_dev = device->lldd_dev; 1757 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1758 struct sas_ha_struct *sas_ha = &hisi_hba->sha; 1759 DECLARE_COMPLETION_ONSTACK(phyreset); 1760 int rc, reset_type; 1761 1762 if (!local_phy->enabled) { 1763 sas_put_local_phy(local_phy); 1764 return -ENODEV; 1765 } 1766 1767 if (scsi_is_sas_phy_local(local_phy)) { 1768 struct asd_sas_phy *sas_phy = 1769 sas_ha->sas_phy[local_phy->number]; 1770 struct hisi_sas_phy *phy = 1771 container_of(sas_phy, struct hisi_sas_phy, sas_phy); 1772 phy->in_reset = 1; 1773 phy->reset_completion = &phyreset; 1774 } 1775 1776 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT || 1777 !dev_is_sata(device)) ? true : false; 1778 1779 rc = sas_phy_reset(local_phy, reset_type); 1780 sas_put_local_phy(local_phy); 1781 1782 if (scsi_is_sas_phy_local(local_phy)) { 1783 struct asd_sas_phy *sas_phy = 1784 sas_ha->sas_phy[local_phy->number]; 1785 struct hisi_sas_phy *phy = 1786 container_of(sas_phy, struct hisi_sas_phy, sas_phy); 1787 int ret = wait_for_completion_timeout(&phyreset, 2 * HZ); 1788 unsigned long flags; 1789 1790 spin_lock_irqsave(&phy->lock, flags); 1791 phy->reset_completion = NULL; 1792 phy->in_reset = 0; 1793 spin_unlock_irqrestore(&phy->lock, flags); 1794 1795 /* report PHY down if timed out */ 1796 if (!ret) 1797 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL); 1798 } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) { 1799 /* 1800 * If in init state, we rely on caller to wait for link to be 1801 * ready; otherwise, except phy reset is fail, delay. 1802 */ 1803 if (!rc) 1804 msleep(2000); 1805 } 1806 1807 return rc; 1808 } 1809 1810 static int hisi_sas_I_T_nexus_reset(struct domain_device *device) 1811 { 1812 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1813 struct device *dev = hisi_hba->dev; 1814 int rc; 1815 1816 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1817 HISI_SAS_INT_ABT_DEV, 0); 1818 if (rc < 0) { 1819 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc); 1820 return TMF_RESP_FUNC_FAILED; 1821 } 1822 hisi_sas_dereg_device(hisi_hba, device); 1823 1824 if (dev_is_sata(device)) { 1825 rc = hisi_sas_softreset_ata_disk(device); 1826 if (rc == TMF_RESP_FUNC_FAILED) 1827 return TMF_RESP_FUNC_FAILED; 1828 } 1829 1830 rc = hisi_sas_debug_I_T_nexus_reset(device); 1831 1832 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV)) 1833 hisi_sas_release_task(hisi_hba, device); 1834 1835 return rc; 1836 } 1837 1838 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun) 1839 { 1840 struct hisi_sas_device *sas_dev = device->lldd_dev; 1841 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1842 struct device *dev = hisi_hba->dev; 1843 int rc = TMF_RESP_FUNC_FAILED; 1844 1845 /* Clear internal IO and then lu reset */ 1846 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1847 HISI_SAS_INT_ABT_DEV, 0); 1848 if (rc < 0) { 1849 dev_err(dev, "lu_reset: internal abort failed\n"); 1850 goto out; 1851 } 1852 hisi_sas_dereg_device(hisi_hba, device); 1853 1854 if (dev_is_sata(device)) { 1855 struct sas_phy *phy; 1856 1857 phy = sas_get_local_phy(device); 1858 1859 rc = sas_phy_reset(phy, true); 1860 1861 if (rc == 0) 1862 hisi_sas_release_task(hisi_hba, device); 1863 sas_put_local_phy(phy); 1864 } else { 1865 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET }; 1866 1867 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 1868 if (rc == TMF_RESP_FUNC_COMPLETE) 1869 hisi_sas_release_task(hisi_hba, device); 1870 } 1871 out: 1872 if (rc != TMF_RESP_FUNC_COMPLETE) 1873 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n", 1874 sas_dev->device_id, rc); 1875 return rc; 1876 } 1877 1878 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha) 1879 { 1880 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 1881 struct device *dev = hisi_hba->dev; 1882 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r); 1883 int rc, i; 1884 1885 queue_work(hisi_hba->wq, &r.work); 1886 wait_for_completion(r.completion); 1887 if (!r.done) 1888 return TMF_RESP_FUNC_FAILED; 1889 1890 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1891 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1892 struct domain_device *device = sas_dev->sas_device; 1893 1894 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device || 1895 dev_is_expander(device->dev_type)) 1896 continue; 1897 1898 rc = hisi_sas_debug_I_T_nexus_reset(device); 1899 if (rc != TMF_RESP_FUNC_COMPLETE) 1900 dev_info(dev, "clear nexus ha: for device[%d] rc=%d\n", 1901 sas_dev->device_id, rc); 1902 } 1903 1904 hisi_sas_release_tasks(hisi_hba); 1905 1906 return TMF_RESP_FUNC_COMPLETE; 1907 } 1908 1909 static int hisi_sas_query_task(struct sas_task *task) 1910 { 1911 struct scsi_lun lun; 1912 struct hisi_sas_tmf_task tmf_task; 1913 int rc = TMF_RESP_FUNC_FAILED; 1914 1915 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { 1916 struct scsi_cmnd *cmnd = task->uldd_task; 1917 struct domain_device *device = task->dev; 1918 struct hisi_sas_slot *slot = task->lldd_task; 1919 u32 tag = slot->idx; 1920 1921 int_to_scsilun(cmnd->device->lun, &lun); 1922 tmf_task.tmf = TMF_QUERY_TASK; 1923 tmf_task.tag_of_task_to_be_managed = tag; 1924 1925 rc = hisi_sas_debug_issue_ssp_tmf(device, 1926 lun.scsi_lun, 1927 &tmf_task); 1928 switch (rc) { 1929 /* The task is still in Lun, release it then */ 1930 case TMF_RESP_FUNC_SUCC: 1931 /* The task is not in Lun or failed, reset the phy */ 1932 case TMF_RESP_FUNC_FAILED: 1933 case TMF_RESP_FUNC_COMPLETE: 1934 break; 1935 default: 1936 rc = TMF_RESP_FUNC_FAILED; 1937 break; 1938 } 1939 } 1940 return rc; 1941 } 1942 1943 static int 1944 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id, 1945 struct sas_task *task, int abort_flag, 1946 int task_tag, struct hisi_sas_dq *dq) 1947 { 1948 struct domain_device *device = task->dev; 1949 struct hisi_sas_device *sas_dev = device->lldd_dev; 1950 struct device *dev = hisi_hba->dev; 1951 struct hisi_sas_port *port; 1952 struct hisi_sas_slot *slot; 1953 struct asd_sas_port *sas_port = device->port; 1954 struct hisi_sas_cmd_hdr *cmd_hdr_base; 1955 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx; 1956 unsigned long flags; 1957 int wr_q_index; 1958 1959 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) 1960 return -EINVAL; 1961 1962 if (!device->port) 1963 return -1; 1964 1965 port = to_hisi_sas_port(sas_port); 1966 1967 /* simply get a slot and send abort command */ 1968 rc = hisi_sas_slot_index_alloc(hisi_hba, NULL); 1969 if (rc < 0) 1970 goto err_out; 1971 1972 slot_idx = rc; 1973 slot = &hisi_hba->slot_info[slot_idx]; 1974 1975 spin_lock(&dq->lock); 1976 wr_q_index = dq->wr_point; 1977 dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS; 1978 list_add_tail(&slot->delivery, &dq->list); 1979 spin_unlock(&dq->lock); 1980 spin_lock(&sas_dev->lock); 1981 list_add_tail(&slot->entry, &sas_dev->list); 1982 spin_unlock(&sas_dev->lock); 1983 1984 dlvry_queue = dq->id; 1985 dlvry_queue_slot = wr_q_index; 1986 1987 slot->device_id = sas_dev->device_id; 1988 slot->n_elem = n_elem; 1989 slot->dlvry_queue = dlvry_queue; 1990 slot->dlvry_queue_slot = dlvry_queue_slot; 1991 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue]; 1992 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot]; 1993 slot->task = task; 1994 slot->port = port; 1995 slot->is_internal = true; 1996 task->lldd_task = slot; 1997 1998 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr)); 1999 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ); 2000 memset(hisi_sas_status_buf_addr_mem(slot), 0, 2001 sizeof(struct hisi_sas_err_record)); 2002 2003 hisi_sas_task_prep_abort(hisi_hba, slot, device_id, 2004 abort_flag, task_tag); 2005 2006 spin_lock_irqsave(&task->task_state_lock, flags); 2007 task->task_state_flags |= SAS_TASK_AT_INITIATOR; 2008 spin_unlock_irqrestore(&task->task_state_lock, flags); 2009 WRITE_ONCE(slot->ready, 1); 2010 /* send abort command to the chip */ 2011 spin_lock(&dq->lock); 2012 hisi_hba->hw->start_delivery(dq); 2013 spin_unlock(&dq->lock); 2014 2015 return 0; 2016 2017 err_out: 2018 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc); 2019 2020 return rc; 2021 } 2022 2023 /** 2024 * _hisi_sas_internal_task_abort -- execute an internal 2025 * abort command for single IO command or a device 2026 * @hisi_hba: host controller struct 2027 * @device: domain device 2028 * @abort_flag: mode of operation, device or single IO 2029 * @tag: tag of IO to be aborted (only relevant to single 2030 * IO mode) 2031 * @dq: delivery queue for this internal abort command 2032 */ 2033 static int 2034 _hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba, 2035 struct domain_device *device, int abort_flag, 2036 int tag, struct hisi_sas_dq *dq) 2037 { 2038 struct sas_task *task; 2039 struct hisi_sas_device *sas_dev = device->lldd_dev; 2040 struct device *dev = hisi_hba->dev; 2041 int res; 2042 2043 /* 2044 * The interface is not realized means this HW don't support internal 2045 * abort, or don't need to do internal abort. Then here, we return 2046 * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that 2047 * the internal abort has been executed and returned CQ. 2048 */ 2049 if (!hisi_hba->hw->prep_abort) 2050 return TMF_RESP_FUNC_FAILED; 2051 2052 task = sas_alloc_slow_task(GFP_KERNEL); 2053 if (!task) 2054 return -ENOMEM; 2055 2056 task->dev = device; 2057 task->task_proto = device->tproto; 2058 task->task_done = hisi_sas_task_done; 2059 task->slow_task->timer.function = hisi_sas_tmf_timedout; 2060 task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT * HZ; 2061 add_timer(&task->slow_task->timer); 2062 2063 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id, 2064 task, abort_flag, tag, dq); 2065 if (res) { 2066 del_timer(&task->slow_task->timer); 2067 dev_err(dev, "internal task abort: executing internal task failed: %d\n", 2068 res); 2069 goto exit; 2070 } 2071 wait_for_completion(&task->slow_task->completion); 2072 res = TMF_RESP_FUNC_FAILED; 2073 2074 /* Internal abort timed out */ 2075 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { 2076 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct) 2077 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work); 2078 2079 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { 2080 struct hisi_sas_slot *slot = task->lldd_task; 2081 2082 if (slot) { 2083 struct hisi_sas_cq *cq = 2084 &hisi_hba->cq[slot->dlvry_queue]; 2085 /* 2086 * sync irq to avoid free'ing task 2087 * before using task in IO completion 2088 */ 2089 synchronize_irq(cq->irq_no); 2090 slot->task = NULL; 2091 } 2092 dev_err(dev, "internal task abort: timeout and not done.\n"); 2093 2094 res = -EIO; 2095 goto exit; 2096 } else 2097 dev_err(dev, "internal task abort: timeout.\n"); 2098 } 2099 2100 if (task->task_status.resp == SAS_TASK_COMPLETE && 2101 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) { 2102 res = TMF_RESP_FUNC_COMPLETE; 2103 goto exit; 2104 } 2105 2106 if (task->task_status.resp == SAS_TASK_COMPLETE && 2107 task->task_status.stat == TMF_RESP_FUNC_SUCC) { 2108 res = TMF_RESP_FUNC_SUCC; 2109 goto exit; 2110 } 2111 2112 exit: 2113 dev_dbg(dev, "internal task abort: task to dev %016llx task=%pK resp: 0x%x sts 0x%x\n", 2114 SAS_ADDR(device->sas_addr), task, 2115 task->task_status.resp, /* 0 is complete, -1 is undelivered */ 2116 task->task_status.stat); 2117 sas_free_task(task); 2118 2119 return res; 2120 } 2121 2122 static int 2123 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba, 2124 struct domain_device *device, 2125 int abort_flag, int tag) 2126 { 2127 struct hisi_sas_slot *slot; 2128 struct device *dev = hisi_hba->dev; 2129 struct hisi_sas_dq *dq; 2130 int i, rc; 2131 2132 switch (abort_flag) { 2133 case HISI_SAS_INT_ABT_CMD: 2134 slot = &hisi_hba->slot_info[tag]; 2135 dq = &hisi_hba->dq[slot->dlvry_queue]; 2136 return _hisi_sas_internal_task_abort(hisi_hba, device, 2137 abort_flag, tag, dq); 2138 case HISI_SAS_INT_ABT_DEV: 2139 for (i = 0; i < hisi_hba->cq_nvecs; i++) { 2140 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2141 const struct cpumask *mask = cq->irq_mask; 2142 2143 if (mask && !cpumask_intersects(cpu_online_mask, mask)) 2144 continue; 2145 dq = &hisi_hba->dq[i]; 2146 rc = _hisi_sas_internal_task_abort(hisi_hba, device, 2147 abort_flag, tag, 2148 dq); 2149 if (rc) 2150 return rc; 2151 } 2152 break; 2153 default: 2154 dev_err(dev, "Unrecognised internal abort flag (%d)\n", 2155 abort_flag); 2156 return -EINVAL; 2157 } 2158 2159 return 0; 2160 } 2161 2162 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy) 2163 { 2164 hisi_sas_port_notify_formed(sas_phy); 2165 } 2166 2167 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type, 2168 u8 reg_index, u8 reg_count, u8 *write_data) 2169 { 2170 struct hisi_hba *hisi_hba = sha->lldd_ha; 2171 2172 if (!hisi_hba->hw->write_gpio) 2173 return -EOPNOTSUPP; 2174 2175 return hisi_hba->hw->write_gpio(hisi_hba, reg_type, 2176 reg_index, reg_count, write_data); 2177 } 2178 2179 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy) 2180 { 2181 struct asd_sas_phy *sas_phy = &phy->sas_phy; 2182 struct sas_phy *sphy = sas_phy->phy; 2183 unsigned long flags; 2184 2185 phy->phy_attached = 0; 2186 phy->phy_type = 0; 2187 phy->port = NULL; 2188 2189 spin_lock_irqsave(&phy->lock, flags); 2190 if (phy->enable) 2191 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; 2192 else 2193 sphy->negotiated_linkrate = SAS_PHY_DISABLED; 2194 spin_unlock_irqrestore(&phy->lock, flags); 2195 } 2196 2197 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy, 2198 gfp_t gfp_flags) 2199 { 2200 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 2201 struct asd_sas_phy *sas_phy = &phy->sas_phy; 2202 struct device *dev = hisi_hba->dev; 2203 2204 if (rdy) { 2205 /* Phy down but ready */ 2206 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags); 2207 hisi_sas_port_notify_formed(sas_phy); 2208 } else { 2209 struct hisi_sas_port *port = phy->port; 2210 2211 if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) || 2212 phy->in_reset) { 2213 dev_info(dev, "ignore flutter phy%d down\n", phy_no); 2214 return; 2215 } 2216 /* Phy down and not ready */ 2217 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags); 2218 sas_phy_disconnected(sas_phy); 2219 2220 if (port) { 2221 if (phy->phy_type & PORT_TYPE_SAS) { 2222 int port_id = port->id; 2223 2224 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba, 2225 port_id)) 2226 port->port_attached = 0; 2227 } else if (phy->phy_type & PORT_TYPE_SATA) 2228 port->port_attached = 0; 2229 } 2230 hisi_sas_phy_disconnected(phy); 2231 } 2232 } 2233 EXPORT_SYMBOL_GPL(hisi_sas_phy_down); 2234 2235 void hisi_sas_sync_irqs(struct hisi_hba *hisi_hba) 2236 { 2237 int i; 2238 2239 for (i = 0; i < hisi_hba->cq_nvecs; i++) { 2240 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2241 2242 synchronize_irq(cq->irq_no); 2243 } 2244 } 2245 EXPORT_SYMBOL_GPL(hisi_sas_sync_irqs); 2246 2247 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type) 2248 { 2249 struct hisi_hba *hisi_hba = shost_priv(shost); 2250 2251 if (reset_type != SCSI_ADAPTER_RESET) 2252 return -EOPNOTSUPP; 2253 2254 queue_work(hisi_hba->wq, &hisi_hba->rst_work); 2255 2256 return 0; 2257 } 2258 EXPORT_SYMBOL_GPL(hisi_sas_host_reset); 2259 2260 struct scsi_transport_template *hisi_sas_stt; 2261 EXPORT_SYMBOL_GPL(hisi_sas_stt); 2262 2263 static struct sas_domain_function_template hisi_sas_transport_ops = { 2264 .lldd_dev_found = hisi_sas_dev_found, 2265 .lldd_dev_gone = hisi_sas_dev_gone, 2266 .lldd_execute_task = hisi_sas_queue_command, 2267 .lldd_control_phy = hisi_sas_control_phy, 2268 .lldd_abort_task = hisi_sas_abort_task, 2269 .lldd_abort_task_set = hisi_sas_abort_task_set, 2270 .lldd_clear_aca = hisi_sas_clear_aca, 2271 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset, 2272 .lldd_lu_reset = hisi_sas_lu_reset, 2273 .lldd_query_task = hisi_sas_query_task, 2274 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha, 2275 .lldd_port_formed = hisi_sas_port_formed, 2276 .lldd_write_gpio = hisi_sas_write_gpio, 2277 }; 2278 2279 void hisi_sas_init_mem(struct hisi_hba *hisi_hba) 2280 { 2281 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS; 2282 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint; 2283 2284 for (i = 0; i < hisi_hba->queue_count; i++) { 2285 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2286 struct hisi_sas_dq *dq = &hisi_hba->dq[i]; 2287 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i]; 2288 2289 s = sizeof(struct hisi_sas_cmd_hdr); 2290 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++) 2291 memset(&cmd_hdr[j], 0, s); 2292 2293 dq->wr_point = 0; 2294 2295 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 2296 memset(hisi_hba->complete_hdr[i], 0, s); 2297 cq->rd_point = 0; 2298 } 2299 2300 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy; 2301 memset(hisi_hba->initial_fis, 0, s); 2302 2303 s = max_command_entries * sizeof(struct hisi_sas_iost); 2304 memset(hisi_hba->iost, 0, s); 2305 2306 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 2307 memset(hisi_hba->breakpoint, 0, s); 2308 2309 s = sizeof(struct hisi_sas_sata_breakpoint); 2310 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++) 2311 memset(&sata_breakpoint[j], 0, s); 2312 } 2313 EXPORT_SYMBOL_GPL(hisi_sas_init_mem); 2314 2315 int hisi_sas_alloc(struct hisi_hba *hisi_hba) 2316 { 2317 struct device *dev = hisi_hba->dev; 2318 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS; 2319 int max_command_entries_ru, sz_slot_buf_ru; 2320 int blk_cnt, slots_per_blk; 2321 2322 sema_init(&hisi_hba->sem, 1); 2323 spin_lock_init(&hisi_hba->lock); 2324 for (i = 0; i < hisi_hba->n_phy; i++) { 2325 hisi_sas_phy_init(hisi_hba, i); 2326 hisi_hba->port[i].port_attached = 0; 2327 hisi_hba->port[i].id = -1; 2328 } 2329 2330 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 2331 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED; 2332 hisi_hba->devices[i].device_id = i; 2333 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT; 2334 } 2335 2336 for (i = 0; i < hisi_hba->queue_count; i++) { 2337 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2338 struct hisi_sas_dq *dq = &hisi_hba->dq[i]; 2339 2340 /* Completion queue structure */ 2341 cq->id = i; 2342 cq->hisi_hba = hisi_hba; 2343 2344 /* Delivery queue structure */ 2345 spin_lock_init(&dq->lock); 2346 INIT_LIST_HEAD(&dq->list); 2347 dq->id = i; 2348 dq->hisi_hba = hisi_hba; 2349 2350 /* Delivery queue */ 2351 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; 2352 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s, 2353 &hisi_hba->cmd_hdr_dma[i], 2354 GFP_KERNEL); 2355 if (!hisi_hba->cmd_hdr[i]) 2356 goto err_out; 2357 2358 /* Completion queue */ 2359 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 2360 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s, 2361 &hisi_hba->complete_hdr_dma[i], 2362 GFP_KERNEL); 2363 if (!hisi_hba->complete_hdr[i]) 2364 goto err_out; 2365 } 2366 2367 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct); 2368 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma, 2369 GFP_KERNEL); 2370 if (!hisi_hba->itct) 2371 goto err_out; 2372 2373 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries, 2374 sizeof(struct hisi_sas_slot), 2375 GFP_KERNEL); 2376 if (!hisi_hba->slot_info) 2377 goto err_out; 2378 2379 /* roundup to avoid overly large block size */ 2380 max_command_entries_ru = roundup(max_command_entries, 64); 2381 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK) 2382 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table); 2383 else 2384 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table); 2385 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64); 2386 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE); 2387 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s; 2388 slots_per_blk = s / sz_slot_buf_ru; 2389 2390 for (i = 0; i < blk_cnt; i++) { 2391 int slot_index = i * slots_per_blk; 2392 dma_addr_t buf_dma; 2393 void *buf; 2394 2395 buf = dmam_alloc_coherent(dev, s, &buf_dma, 2396 GFP_KERNEL); 2397 if (!buf) 2398 goto err_out; 2399 2400 for (j = 0; j < slots_per_blk; j++, slot_index++) { 2401 struct hisi_sas_slot *slot; 2402 2403 slot = &hisi_hba->slot_info[slot_index]; 2404 slot->buf = buf; 2405 slot->buf_dma = buf_dma; 2406 slot->idx = slot_index; 2407 2408 buf += sz_slot_buf_ru; 2409 buf_dma += sz_slot_buf_ru; 2410 } 2411 } 2412 2413 s = max_command_entries * sizeof(struct hisi_sas_iost); 2414 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma, 2415 GFP_KERNEL); 2416 if (!hisi_hba->iost) 2417 goto err_out; 2418 2419 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 2420 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s, 2421 &hisi_hba->breakpoint_dma, 2422 GFP_KERNEL); 2423 if (!hisi_hba->breakpoint) 2424 goto err_out; 2425 2426 hisi_hba->slot_index_count = max_command_entries; 2427 s = hisi_hba->slot_index_count / BITS_PER_BYTE; 2428 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL); 2429 if (!hisi_hba->slot_index_tags) 2430 goto err_out; 2431 2432 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS; 2433 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s, 2434 &hisi_hba->initial_fis_dma, 2435 GFP_KERNEL); 2436 if (!hisi_hba->initial_fis) 2437 goto err_out; 2438 2439 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint); 2440 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s, 2441 &hisi_hba->sata_breakpoint_dma, 2442 GFP_KERNEL); 2443 if (!hisi_hba->sata_breakpoint) 2444 goto err_out; 2445 2446 hisi_sas_slot_index_init(hisi_hba); 2447 hisi_hba->last_slot_index = HISI_SAS_UNRESERVED_IPTT; 2448 2449 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev)); 2450 if (!hisi_hba->wq) { 2451 dev_err(dev, "sas_alloc: failed to create workqueue\n"); 2452 goto err_out; 2453 } 2454 2455 return 0; 2456 err_out: 2457 return -ENOMEM; 2458 } 2459 EXPORT_SYMBOL_GPL(hisi_sas_alloc); 2460 2461 void hisi_sas_free(struct hisi_hba *hisi_hba) 2462 { 2463 int i; 2464 2465 for (i = 0; i < hisi_hba->n_phy; i++) { 2466 struct hisi_sas_phy *phy = &hisi_hba->phy[i]; 2467 2468 del_timer_sync(&phy->timer); 2469 } 2470 2471 if (hisi_hba->wq) 2472 destroy_workqueue(hisi_hba->wq); 2473 } 2474 EXPORT_SYMBOL_GPL(hisi_sas_free); 2475 2476 void hisi_sas_rst_work_handler(struct work_struct *work) 2477 { 2478 struct hisi_hba *hisi_hba = 2479 container_of(work, struct hisi_hba, rst_work); 2480 2481 if (hisi_sas_controller_prereset(hisi_hba)) 2482 return; 2483 2484 hisi_sas_controller_reset(hisi_hba); 2485 } 2486 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler); 2487 2488 void hisi_sas_sync_rst_work_handler(struct work_struct *work) 2489 { 2490 struct hisi_sas_rst *rst = 2491 container_of(work, struct hisi_sas_rst, work); 2492 2493 if (hisi_sas_controller_prereset(rst->hisi_hba)) 2494 goto rst_complete; 2495 2496 if (!hisi_sas_controller_reset(rst->hisi_hba)) 2497 rst->done = true; 2498 rst_complete: 2499 complete(rst->completion); 2500 } 2501 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler); 2502 2503 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba) 2504 { 2505 struct device *dev = hisi_hba->dev; 2506 struct platform_device *pdev = hisi_hba->platform_dev; 2507 struct device_node *np = pdev ? pdev->dev.of_node : NULL; 2508 struct clk *refclk; 2509 2510 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr, 2511 SAS_ADDR_SIZE)) { 2512 dev_err(dev, "could not get property sas-addr\n"); 2513 return -ENOENT; 2514 } 2515 2516 if (np) { 2517 /* 2518 * These properties are only required for platform device-based 2519 * controller with DT firmware. 2520 */ 2521 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np, 2522 "hisilicon,sas-syscon"); 2523 if (IS_ERR(hisi_hba->ctrl)) { 2524 dev_err(dev, "could not get syscon\n"); 2525 return -ENOENT; 2526 } 2527 2528 if (device_property_read_u32(dev, "ctrl-reset-reg", 2529 &hisi_hba->ctrl_reset_reg)) { 2530 dev_err(dev, "could not get property ctrl-reset-reg\n"); 2531 return -ENOENT; 2532 } 2533 2534 if (device_property_read_u32(dev, "ctrl-reset-sts-reg", 2535 &hisi_hba->ctrl_reset_sts_reg)) { 2536 dev_err(dev, "could not get property ctrl-reset-sts-reg\n"); 2537 return -ENOENT; 2538 } 2539 2540 if (device_property_read_u32(dev, "ctrl-clock-ena-reg", 2541 &hisi_hba->ctrl_clock_ena_reg)) { 2542 dev_err(dev, "could not get property ctrl-clock-ena-reg\n"); 2543 return -ENOENT; 2544 } 2545 } 2546 2547 refclk = devm_clk_get(dev, NULL); 2548 if (IS_ERR(refclk)) 2549 dev_dbg(dev, "no ref clk property\n"); 2550 else 2551 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000; 2552 2553 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) { 2554 dev_err(dev, "could not get property phy-count\n"); 2555 return -ENOENT; 2556 } 2557 2558 if (device_property_read_u32(dev, "queue-count", 2559 &hisi_hba->queue_count)) { 2560 dev_err(dev, "could not get property queue-count\n"); 2561 return -ENOENT; 2562 } 2563 2564 return 0; 2565 } 2566 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info); 2567 2568 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev, 2569 const struct hisi_sas_hw *hw) 2570 { 2571 struct resource *res; 2572 struct Scsi_Host *shost; 2573 struct hisi_hba *hisi_hba; 2574 struct device *dev = &pdev->dev; 2575 int error; 2576 2577 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba)); 2578 if (!shost) { 2579 dev_err(dev, "scsi host alloc failed\n"); 2580 return NULL; 2581 } 2582 hisi_hba = shost_priv(shost); 2583 2584 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler); 2585 hisi_hba->hw = hw; 2586 hisi_hba->dev = dev; 2587 hisi_hba->platform_dev = pdev; 2588 hisi_hba->shost = shost; 2589 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha; 2590 2591 timer_setup(&hisi_hba->timer, NULL, 0); 2592 2593 if (hisi_sas_get_fw_info(hisi_hba) < 0) 2594 goto err_out; 2595 2596 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); 2597 if (error) 2598 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 2599 2600 if (error) { 2601 dev_err(dev, "No usable DMA addressing method\n"); 2602 goto err_out; 2603 } 2604 2605 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0); 2606 if (IS_ERR(hisi_hba->regs)) 2607 goto err_out; 2608 2609 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 2610 if (res) { 2611 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res); 2612 if (IS_ERR(hisi_hba->sgpio_regs)) 2613 goto err_out; 2614 } 2615 2616 if (hisi_sas_alloc(hisi_hba)) { 2617 hisi_sas_free(hisi_hba); 2618 goto err_out; 2619 } 2620 2621 return shost; 2622 err_out: 2623 scsi_host_put(shost); 2624 dev_err(dev, "shost alloc failed\n"); 2625 return NULL; 2626 } 2627 2628 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba) 2629 { 2630 if (hisi_hba->hw->interrupt_preinit) 2631 return hisi_hba->hw->interrupt_preinit(hisi_hba); 2632 return 0; 2633 } 2634 2635 int hisi_sas_probe(struct platform_device *pdev, 2636 const struct hisi_sas_hw *hw) 2637 { 2638 struct Scsi_Host *shost; 2639 struct hisi_hba *hisi_hba; 2640 struct device *dev = &pdev->dev; 2641 struct asd_sas_phy **arr_phy; 2642 struct asd_sas_port **arr_port; 2643 struct sas_ha_struct *sha; 2644 int rc, phy_nr, port_nr, i; 2645 2646 shost = hisi_sas_shost_alloc(pdev, hw); 2647 if (!shost) 2648 return -ENOMEM; 2649 2650 sha = SHOST_TO_SAS_HA(shost); 2651 hisi_hba = shost_priv(shost); 2652 platform_set_drvdata(pdev, sha); 2653 2654 phy_nr = port_nr = hisi_hba->n_phy; 2655 2656 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL); 2657 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL); 2658 if (!arr_phy || !arr_port) { 2659 rc = -ENOMEM; 2660 goto err_out_ha; 2661 } 2662 2663 sha->sas_phy = arr_phy; 2664 sha->sas_port = arr_port; 2665 sha->lldd_ha = hisi_hba; 2666 2667 shost->transportt = hisi_sas_stt; 2668 shost->max_id = HISI_SAS_MAX_DEVICES; 2669 shost->max_lun = ~0; 2670 shost->max_channel = 1; 2671 shost->max_cmd_len = 16; 2672 if (hisi_hba->hw->slot_index_alloc) { 2673 shost->can_queue = HISI_SAS_MAX_COMMANDS; 2674 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS; 2675 } else { 2676 shost->can_queue = HISI_SAS_UNRESERVED_IPTT; 2677 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT; 2678 } 2679 2680 sha->sas_ha_name = DRV_NAME; 2681 sha->dev = hisi_hba->dev; 2682 sha->lldd_module = THIS_MODULE; 2683 sha->sas_addr = &hisi_hba->sas_addr[0]; 2684 sha->num_phys = hisi_hba->n_phy; 2685 sha->core.shost = hisi_hba->shost; 2686 2687 for (i = 0; i < hisi_hba->n_phy; i++) { 2688 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy; 2689 sha->sas_port[i] = &hisi_hba->port[i].sas_port; 2690 } 2691 2692 rc = hisi_sas_interrupt_preinit(hisi_hba); 2693 if (rc) 2694 goto err_out_ha; 2695 2696 rc = scsi_add_host(shost, &pdev->dev); 2697 if (rc) 2698 goto err_out_ha; 2699 2700 rc = sas_register_ha(sha); 2701 if (rc) 2702 goto err_out_register_ha; 2703 2704 rc = hisi_hba->hw->hw_init(hisi_hba); 2705 if (rc) 2706 goto err_out_hw_init; 2707 2708 scsi_scan_host(shost); 2709 2710 return 0; 2711 2712 err_out_hw_init: 2713 sas_unregister_ha(sha); 2714 err_out_register_ha: 2715 scsi_remove_host(shost); 2716 err_out_ha: 2717 hisi_sas_free(hisi_hba); 2718 scsi_host_put(shost); 2719 return rc; 2720 } 2721 EXPORT_SYMBOL_GPL(hisi_sas_probe); 2722 2723 int hisi_sas_remove(struct platform_device *pdev) 2724 { 2725 struct sas_ha_struct *sha = platform_get_drvdata(pdev); 2726 struct hisi_hba *hisi_hba = sha->lldd_ha; 2727 struct Scsi_Host *shost = sha->core.shost; 2728 2729 if (timer_pending(&hisi_hba->timer)) 2730 del_timer(&hisi_hba->timer); 2731 2732 sas_unregister_ha(sha); 2733 sas_remove_host(sha->core.shost); 2734 2735 hisi_sas_free(hisi_hba); 2736 scsi_host_put(shost); 2737 return 0; 2738 } 2739 EXPORT_SYMBOL_GPL(hisi_sas_remove); 2740 2741 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE) 2742 #define DEBUGFS_ENABLE_DEFAULT "enabled" 2743 bool hisi_sas_debugfs_enable = true; 2744 u32 hisi_sas_debugfs_dump_count = 50; 2745 #else 2746 #define DEBUGFS_ENABLE_DEFAULT "disabled" 2747 bool hisi_sas_debugfs_enable; 2748 u32 hisi_sas_debugfs_dump_count = 1; 2749 #endif 2750 2751 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable); 2752 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444); 2753 MODULE_PARM_DESC(hisi_sas_debugfs_enable, 2754 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")"); 2755 2756 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count); 2757 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444); 2758 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow"); 2759 2760 struct dentry *hisi_sas_debugfs_dir; 2761 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir); 2762 2763 static __init int hisi_sas_init(void) 2764 { 2765 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops); 2766 if (!hisi_sas_stt) 2767 return -ENOMEM; 2768 2769 if (hisi_sas_debugfs_enable) { 2770 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL); 2771 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) { 2772 pr_info("hisi_sas: Limiting debugfs dump count\n"); 2773 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP; 2774 } 2775 } 2776 2777 return 0; 2778 } 2779 2780 static __exit void hisi_sas_exit(void) 2781 { 2782 sas_release_transport(hisi_sas_stt); 2783 2784 debugfs_remove(hisi_sas_debugfs_dir); 2785 } 2786 2787 module_init(hisi_sas_init); 2788 module_exit(hisi_sas_exit); 2789 2790 MODULE_LICENSE("GPL"); 2791 MODULE_AUTHOR("John Garry <john.garry@huawei.com>"); 2792 MODULE_DESCRIPTION("HISILICON SAS controller driver"); 2793 MODULE_ALIAS("platform:" DRV_NAME); 2794