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 de-reset failed\n"); 1345 } 1346 } else { 1347 dev_err(dev, "ata disk reset failed\n"); 1348 } 1349 1350 if (rc == TMF_RESP_FUNC_COMPLETE) 1351 hisi_sas_release_task(hisi_hba, device); 1352 1353 return rc; 1354 } 1355 1356 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device, 1357 u8 *lun, struct hisi_sas_tmf_task *tmf) 1358 { 1359 struct sas_ssp_task ssp_task; 1360 1361 if (!(device->tproto & SAS_PROTOCOL_SSP)) 1362 return TMF_RESP_FUNC_ESUPP; 1363 1364 memcpy(ssp_task.LUN, lun, 8); 1365 1366 return hisi_sas_exec_internal_tmf_task(device, &ssp_task, 1367 sizeof(ssp_task), tmf); 1368 } 1369 1370 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba) 1371 { 1372 u32 state = hisi_hba->hw->get_phys_state(hisi_hba); 1373 int i; 1374 1375 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1376 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1377 struct domain_device *device = sas_dev->sas_device; 1378 struct asd_sas_port *sas_port; 1379 struct hisi_sas_port *port; 1380 struct hisi_sas_phy *phy = NULL; 1381 struct asd_sas_phy *sas_phy; 1382 1383 if ((sas_dev->dev_type == SAS_PHY_UNUSED) 1384 || !device || !device->port) 1385 continue; 1386 1387 sas_port = device->port; 1388 port = to_hisi_sas_port(sas_port); 1389 1390 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) 1391 if (state & BIT(sas_phy->id)) { 1392 phy = sas_phy->lldd_phy; 1393 break; 1394 } 1395 1396 if (phy) { 1397 port->id = phy->port_id; 1398 1399 /* Update linkrate of directly attached device. */ 1400 if (!device->parent) 1401 device->linkrate = phy->sas_phy.linkrate; 1402 1403 hisi_hba->hw->setup_itct(hisi_hba, sas_dev); 1404 } else 1405 port->id = 0xff; 1406 } 1407 } 1408 1409 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state) 1410 { 1411 struct asd_sas_port *_sas_port = NULL; 1412 int phy_no; 1413 1414 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) { 1415 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1416 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1417 struct asd_sas_port *sas_port = sas_phy->port; 1418 bool do_port_check = _sas_port != sas_port; 1419 1420 if (!sas_phy->phy->enabled) 1421 continue; 1422 1423 /* Report PHY state change to libsas */ 1424 if (state & BIT(phy_no)) { 1425 if (do_port_check && sas_port && sas_port->port_dev) { 1426 struct domain_device *dev = sas_port->port_dev; 1427 1428 _sas_port = sas_port; 1429 1430 if (dev_is_expander(dev->dev_type)) 1431 sas_notify_port_event(sas_phy, 1432 PORTE_BROADCAST_RCVD, 1433 GFP_KERNEL); 1434 } 1435 } else { 1436 hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL); 1437 } 1438 } 1439 } 1440 1441 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba) 1442 { 1443 struct hisi_sas_device *sas_dev; 1444 struct domain_device *device; 1445 int i; 1446 1447 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1448 sas_dev = &hisi_hba->devices[i]; 1449 device = sas_dev->sas_device; 1450 1451 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device) 1452 continue; 1453 1454 hisi_sas_init_device(device); 1455 } 1456 } 1457 1458 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba, 1459 struct asd_sas_port *sas_port, 1460 struct domain_device *device) 1461 { 1462 struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 }; 1463 struct ata_port *ap = device->sata_dev.ap; 1464 struct device *dev = hisi_hba->dev; 1465 int s = sizeof(struct host_to_dev_fis); 1466 int rc = TMF_RESP_FUNC_FAILED; 1467 struct asd_sas_phy *sas_phy; 1468 struct ata_link *link; 1469 u8 fis[20] = {0}; 1470 u32 state; 1471 1472 state = hisi_hba->hw->get_phys_state(hisi_hba); 1473 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) { 1474 if (!(state & BIT(sas_phy->id))) 1475 continue; 1476 1477 ata_for_each_link(link, ap, EDGE) { 1478 int pmp = sata_srst_pmp(link); 1479 1480 tmf_task.phy_id = sas_phy->id; 1481 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis); 1482 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, 1483 &tmf_task); 1484 if (rc != TMF_RESP_FUNC_COMPLETE) { 1485 dev_err(dev, "phy%d ata reset failed rc=%d\n", 1486 sas_phy->id, rc); 1487 break; 1488 } 1489 } 1490 } 1491 } 1492 1493 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba) 1494 { 1495 struct device *dev = hisi_hba->dev; 1496 int port_no, rc, i; 1497 1498 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1499 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1500 struct domain_device *device = sas_dev->sas_device; 1501 1502 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device) 1503 continue; 1504 1505 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1506 HISI_SAS_INT_ABT_DEV, 0); 1507 if (rc < 0) 1508 dev_err(dev, "STP reject: abort dev failed %d\n", rc); 1509 } 1510 1511 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) { 1512 struct hisi_sas_port *port = &hisi_hba->port[port_no]; 1513 struct asd_sas_port *sas_port = &port->sas_port; 1514 struct domain_device *port_dev = sas_port->port_dev; 1515 struct domain_device *device; 1516 1517 if (!port_dev || !dev_is_expander(port_dev->dev_type)) 1518 continue; 1519 1520 /* Try to find a SATA device */ 1521 list_for_each_entry(device, &sas_port->dev_list, 1522 dev_list_node) { 1523 if (dev_is_sata(device)) { 1524 hisi_sas_send_ata_reset_each_phy(hisi_hba, 1525 sas_port, 1526 device); 1527 break; 1528 } 1529 } 1530 } 1531 } 1532 1533 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba) 1534 { 1535 struct Scsi_Host *shost = hisi_hba->shost; 1536 1537 down(&hisi_hba->sem); 1538 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba); 1539 1540 scsi_block_requests(shost); 1541 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000); 1542 1543 if (timer_pending(&hisi_hba->timer)) 1544 del_timer_sync(&hisi_hba->timer); 1545 1546 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); 1547 } 1548 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare); 1549 1550 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba) 1551 { 1552 struct Scsi_Host *shost = hisi_hba->shost; 1553 1554 /* Init and wait for PHYs to come up and all libsas event finished. */ 1555 hisi_hba->hw->phys_init(hisi_hba); 1556 msleep(1000); 1557 hisi_sas_refresh_port_id(hisi_hba); 1558 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); 1559 1560 if (hisi_hba->reject_stp_links_msk) 1561 hisi_sas_terminate_stp_reject(hisi_hba); 1562 hisi_sas_reset_init_all_devices(hisi_hba); 1563 up(&hisi_hba->sem); 1564 scsi_unblock_requests(shost); 1565 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags); 1566 1567 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state); 1568 } 1569 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done); 1570 1571 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba) 1572 { 1573 struct device *dev = hisi_hba->dev; 1574 struct Scsi_Host *shost = hisi_hba->shost; 1575 int rc; 1576 1577 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct) 1578 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work); 1579 1580 if (!hisi_hba->hw->soft_reset) 1581 return -1; 1582 1583 if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) 1584 return -1; 1585 1586 dev_info(dev, "controller resetting...\n"); 1587 hisi_sas_controller_reset_prepare(hisi_hba); 1588 1589 rc = hisi_hba->hw->soft_reset(hisi_hba); 1590 if (rc) { 1591 dev_warn(dev, "controller reset failed (%d)\n", rc); 1592 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); 1593 up(&hisi_hba->sem); 1594 scsi_unblock_requests(shost); 1595 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags); 1596 return rc; 1597 } 1598 1599 hisi_sas_controller_reset_done(hisi_hba); 1600 dev_info(dev, "controller reset complete\n"); 1601 1602 return 0; 1603 } 1604 1605 static int hisi_sas_abort_task(struct sas_task *task) 1606 { 1607 struct scsi_lun lun; 1608 struct hisi_sas_tmf_task tmf_task; 1609 struct domain_device *device = task->dev; 1610 struct hisi_sas_device *sas_dev = device->lldd_dev; 1611 struct hisi_hba *hisi_hba; 1612 struct device *dev; 1613 int rc = TMF_RESP_FUNC_FAILED; 1614 unsigned long flags; 1615 1616 if (!sas_dev) 1617 return TMF_RESP_FUNC_FAILED; 1618 1619 hisi_hba = dev_to_hisi_hba(task->dev); 1620 dev = hisi_hba->dev; 1621 1622 spin_lock_irqsave(&task->task_state_lock, flags); 1623 if (task->task_state_flags & SAS_TASK_STATE_DONE) { 1624 struct hisi_sas_slot *slot = task->lldd_task; 1625 struct hisi_sas_cq *cq; 1626 1627 if (slot) { 1628 /* 1629 * sync irq to avoid free'ing task 1630 * before using task in IO completion 1631 */ 1632 cq = &hisi_hba->cq[slot->dlvry_queue]; 1633 synchronize_irq(cq->irq_no); 1634 } 1635 spin_unlock_irqrestore(&task->task_state_lock, flags); 1636 rc = TMF_RESP_FUNC_COMPLETE; 1637 goto out; 1638 } 1639 task->task_state_flags |= SAS_TASK_STATE_ABORTED; 1640 spin_unlock_irqrestore(&task->task_state_lock, flags); 1641 1642 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { 1643 struct scsi_cmnd *cmnd = task->uldd_task; 1644 struct hisi_sas_slot *slot = task->lldd_task; 1645 u16 tag = slot->idx; 1646 int rc2; 1647 1648 int_to_scsilun(cmnd->device->lun, &lun); 1649 tmf_task.tmf = TMF_ABORT_TASK; 1650 tmf_task.tag_of_task_to_be_managed = tag; 1651 1652 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, 1653 &tmf_task); 1654 1655 rc2 = hisi_sas_internal_task_abort(hisi_hba, device, 1656 HISI_SAS_INT_ABT_CMD, tag); 1657 if (rc2 < 0) { 1658 dev_err(dev, "abort task: internal abort (%d)\n", rc2); 1659 return TMF_RESP_FUNC_FAILED; 1660 } 1661 1662 /* 1663 * If the TMF finds that the IO is not in the device and also 1664 * the internal abort does not succeed, then it is safe to 1665 * free the slot. 1666 * Note: if the internal abort succeeds then the slot 1667 * will have already been completed 1668 */ 1669 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) { 1670 if (task->lldd_task) 1671 hisi_sas_do_release_task(hisi_hba, task, slot); 1672 } 1673 } else if (task->task_proto & SAS_PROTOCOL_SATA || 1674 task->task_proto & SAS_PROTOCOL_STP) { 1675 if (task->dev->dev_type == SAS_SATA_DEV) { 1676 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1677 HISI_SAS_INT_ABT_DEV, 1678 0); 1679 if (rc < 0) { 1680 dev_err(dev, "abort task: internal abort failed\n"); 1681 goto out; 1682 } 1683 hisi_sas_dereg_device(hisi_hba, device); 1684 rc = hisi_sas_softreset_ata_disk(device); 1685 } 1686 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) { 1687 /* SMP */ 1688 struct hisi_sas_slot *slot = task->lldd_task; 1689 u32 tag = slot->idx; 1690 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue]; 1691 1692 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1693 HISI_SAS_INT_ABT_CMD, tag); 1694 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) && 1695 task->lldd_task) { 1696 /* 1697 * sync irq to avoid free'ing task 1698 * before using task in IO completion 1699 */ 1700 synchronize_irq(cq->irq_no); 1701 slot->task = NULL; 1702 } 1703 } 1704 1705 out: 1706 if (rc != TMF_RESP_FUNC_COMPLETE) 1707 dev_notice(dev, "abort task: rc=%d\n", rc); 1708 return rc; 1709 } 1710 1711 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun) 1712 { 1713 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1714 struct device *dev = hisi_hba->dev; 1715 struct hisi_sas_tmf_task tmf_task; 1716 int rc; 1717 1718 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1719 HISI_SAS_INT_ABT_DEV, 0); 1720 if (rc < 0) { 1721 dev_err(dev, "abort task set: internal abort rc=%d\n", rc); 1722 return TMF_RESP_FUNC_FAILED; 1723 } 1724 hisi_sas_dereg_device(hisi_hba, device); 1725 1726 tmf_task.tmf = TMF_ABORT_TASK_SET; 1727 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 1728 1729 if (rc == TMF_RESP_FUNC_COMPLETE) 1730 hisi_sas_release_task(hisi_hba, device); 1731 1732 return rc; 1733 } 1734 1735 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun) 1736 { 1737 struct hisi_sas_tmf_task tmf_task; 1738 int rc; 1739 1740 tmf_task.tmf = TMF_CLEAR_ACA; 1741 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 1742 1743 return rc; 1744 } 1745 1746 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device) 1747 { 1748 struct sas_phy *local_phy = sas_get_local_phy(device); 1749 struct hisi_sas_device *sas_dev = device->lldd_dev; 1750 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1751 struct sas_ha_struct *sas_ha = &hisi_hba->sha; 1752 DECLARE_COMPLETION_ONSTACK(phyreset); 1753 int rc, reset_type; 1754 1755 if (!local_phy->enabled) { 1756 sas_put_local_phy(local_phy); 1757 return -ENODEV; 1758 } 1759 1760 if (scsi_is_sas_phy_local(local_phy)) { 1761 struct asd_sas_phy *sas_phy = 1762 sas_ha->sas_phy[local_phy->number]; 1763 struct hisi_sas_phy *phy = 1764 container_of(sas_phy, struct hisi_sas_phy, sas_phy); 1765 phy->in_reset = 1; 1766 phy->reset_completion = &phyreset; 1767 } 1768 1769 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT || 1770 !dev_is_sata(device)) ? true : false; 1771 1772 rc = sas_phy_reset(local_phy, reset_type); 1773 sas_put_local_phy(local_phy); 1774 1775 if (scsi_is_sas_phy_local(local_phy)) { 1776 struct asd_sas_phy *sas_phy = 1777 sas_ha->sas_phy[local_phy->number]; 1778 struct hisi_sas_phy *phy = 1779 container_of(sas_phy, struct hisi_sas_phy, sas_phy); 1780 int ret = wait_for_completion_timeout(&phyreset, 2 * HZ); 1781 unsigned long flags; 1782 1783 spin_lock_irqsave(&phy->lock, flags); 1784 phy->reset_completion = NULL; 1785 phy->in_reset = 0; 1786 spin_unlock_irqrestore(&phy->lock, flags); 1787 1788 /* report PHY down if timed out */ 1789 if (!ret) 1790 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL); 1791 } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) { 1792 /* 1793 * If in init state, we rely on caller to wait for link to be 1794 * ready; otherwise, except phy reset is fail, delay. 1795 */ 1796 if (!rc) 1797 msleep(2000); 1798 } 1799 1800 return rc; 1801 } 1802 1803 static int hisi_sas_I_T_nexus_reset(struct domain_device *device) 1804 { 1805 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1806 struct device *dev = hisi_hba->dev; 1807 int rc; 1808 1809 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1810 HISI_SAS_INT_ABT_DEV, 0); 1811 if (rc < 0) { 1812 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc); 1813 return TMF_RESP_FUNC_FAILED; 1814 } 1815 hisi_sas_dereg_device(hisi_hba, device); 1816 1817 if (dev_is_sata(device)) { 1818 rc = hisi_sas_softreset_ata_disk(device); 1819 if (rc == TMF_RESP_FUNC_FAILED) 1820 return TMF_RESP_FUNC_FAILED; 1821 } 1822 1823 rc = hisi_sas_debug_I_T_nexus_reset(device); 1824 1825 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV)) 1826 hisi_sas_release_task(hisi_hba, device); 1827 1828 return rc; 1829 } 1830 1831 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun) 1832 { 1833 struct hisi_sas_device *sas_dev = device->lldd_dev; 1834 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1835 struct device *dev = hisi_hba->dev; 1836 int rc = TMF_RESP_FUNC_FAILED; 1837 1838 /* Clear internal IO and then lu reset */ 1839 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1840 HISI_SAS_INT_ABT_DEV, 0); 1841 if (rc < 0) { 1842 dev_err(dev, "lu_reset: internal abort failed\n"); 1843 goto out; 1844 } 1845 hisi_sas_dereg_device(hisi_hba, device); 1846 1847 if (dev_is_sata(device)) { 1848 struct sas_phy *phy; 1849 1850 phy = sas_get_local_phy(device); 1851 1852 rc = sas_phy_reset(phy, true); 1853 1854 if (rc == 0) 1855 hisi_sas_release_task(hisi_hba, device); 1856 sas_put_local_phy(phy); 1857 } else { 1858 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET }; 1859 1860 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 1861 if (rc == TMF_RESP_FUNC_COMPLETE) 1862 hisi_sas_release_task(hisi_hba, device); 1863 } 1864 out: 1865 if (rc != TMF_RESP_FUNC_COMPLETE) 1866 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n", 1867 sas_dev->device_id, rc); 1868 return rc; 1869 } 1870 1871 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha) 1872 { 1873 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 1874 struct device *dev = hisi_hba->dev; 1875 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r); 1876 int rc, i; 1877 1878 queue_work(hisi_hba->wq, &r.work); 1879 wait_for_completion(r.completion); 1880 if (!r.done) 1881 return TMF_RESP_FUNC_FAILED; 1882 1883 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1884 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1885 struct domain_device *device = sas_dev->sas_device; 1886 1887 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device || 1888 dev_is_expander(device->dev_type)) 1889 continue; 1890 1891 rc = hisi_sas_debug_I_T_nexus_reset(device); 1892 if (rc != TMF_RESP_FUNC_COMPLETE) 1893 dev_info(dev, "clear nexus ha: for device[%d] rc=%d\n", 1894 sas_dev->device_id, rc); 1895 } 1896 1897 hisi_sas_release_tasks(hisi_hba); 1898 1899 return TMF_RESP_FUNC_COMPLETE; 1900 } 1901 1902 static int hisi_sas_query_task(struct sas_task *task) 1903 { 1904 struct scsi_lun lun; 1905 struct hisi_sas_tmf_task tmf_task; 1906 int rc = TMF_RESP_FUNC_FAILED; 1907 1908 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { 1909 struct scsi_cmnd *cmnd = task->uldd_task; 1910 struct domain_device *device = task->dev; 1911 struct hisi_sas_slot *slot = task->lldd_task; 1912 u32 tag = slot->idx; 1913 1914 int_to_scsilun(cmnd->device->lun, &lun); 1915 tmf_task.tmf = TMF_QUERY_TASK; 1916 tmf_task.tag_of_task_to_be_managed = tag; 1917 1918 rc = hisi_sas_debug_issue_ssp_tmf(device, 1919 lun.scsi_lun, 1920 &tmf_task); 1921 switch (rc) { 1922 /* The task is still in Lun, release it then */ 1923 case TMF_RESP_FUNC_SUCC: 1924 /* The task is not in Lun or failed, reset the phy */ 1925 case TMF_RESP_FUNC_FAILED: 1926 case TMF_RESP_FUNC_COMPLETE: 1927 break; 1928 default: 1929 rc = TMF_RESP_FUNC_FAILED; 1930 break; 1931 } 1932 } 1933 return rc; 1934 } 1935 1936 static int 1937 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id, 1938 struct sas_task *task, int abort_flag, 1939 int task_tag, struct hisi_sas_dq *dq) 1940 { 1941 struct domain_device *device = task->dev; 1942 struct hisi_sas_device *sas_dev = device->lldd_dev; 1943 struct device *dev = hisi_hba->dev; 1944 struct hisi_sas_port *port; 1945 struct hisi_sas_slot *slot; 1946 struct asd_sas_port *sas_port = device->port; 1947 struct hisi_sas_cmd_hdr *cmd_hdr_base; 1948 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx; 1949 unsigned long flags; 1950 int wr_q_index; 1951 1952 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) 1953 return -EINVAL; 1954 1955 if (!device->port) 1956 return -1; 1957 1958 port = to_hisi_sas_port(sas_port); 1959 1960 /* simply get a slot and send abort command */ 1961 rc = hisi_sas_slot_index_alloc(hisi_hba, NULL); 1962 if (rc < 0) 1963 goto err_out; 1964 1965 slot_idx = rc; 1966 slot = &hisi_hba->slot_info[slot_idx]; 1967 1968 spin_lock(&dq->lock); 1969 wr_q_index = dq->wr_point; 1970 dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS; 1971 list_add_tail(&slot->delivery, &dq->list); 1972 spin_unlock(&dq->lock); 1973 spin_lock(&sas_dev->lock); 1974 list_add_tail(&slot->entry, &sas_dev->list); 1975 spin_unlock(&sas_dev->lock); 1976 1977 dlvry_queue = dq->id; 1978 dlvry_queue_slot = wr_q_index; 1979 1980 slot->device_id = sas_dev->device_id; 1981 slot->n_elem = n_elem; 1982 slot->dlvry_queue = dlvry_queue; 1983 slot->dlvry_queue_slot = dlvry_queue_slot; 1984 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue]; 1985 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot]; 1986 slot->task = task; 1987 slot->port = port; 1988 slot->is_internal = true; 1989 task->lldd_task = slot; 1990 1991 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr)); 1992 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ); 1993 memset(hisi_sas_status_buf_addr_mem(slot), 0, 1994 sizeof(struct hisi_sas_err_record)); 1995 1996 hisi_sas_task_prep_abort(hisi_hba, slot, device_id, 1997 abort_flag, task_tag); 1998 1999 spin_lock_irqsave(&task->task_state_lock, flags); 2000 task->task_state_flags |= SAS_TASK_AT_INITIATOR; 2001 spin_unlock_irqrestore(&task->task_state_lock, flags); 2002 WRITE_ONCE(slot->ready, 1); 2003 /* send abort command to the chip */ 2004 spin_lock(&dq->lock); 2005 hisi_hba->hw->start_delivery(dq); 2006 spin_unlock(&dq->lock); 2007 2008 return 0; 2009 2010 err_out: 2011 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc); 2012 2013 return rc; 2014 } 2015 2016 /** 2017 * _hisi_sas_internal_task_abort -- execute an internal 2018 * abort command for single IO command or a device 2019 * @hisi_hba: host controller struct 2020 * @device: domain device 2021 * @abort_flag: mode of operation, device or single IO 2022 * @tag: tag of IO to be aborted (only relevant to single 2023 * IO mode) 2024 * @dq: delivery queue for this internal abort command 2025 */ 2026 static int 2027 _hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba, 2028 struct domain_device *device, int abort_flag, 2029 int tag, struct hisi_sas_dq *dq) 2030 { 2031 struct sas_task *task; 2032 struct hisi_sas_device *sas_dev = device->lldd_dev; 2033 struct device *dev = hisi_hba->dev; 2034 int res; 2035 2036 /* 2037 * The interface is not realized means this HW don't support internal 2038 * abort, or don't need to do internal abort. Then here, we return 2039 * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that 2040 * the internal abort has been executed and returned CQ. 2041 */ 2042 if (!hisi_hba->hw->prep_abort) 2043 return TMF_RESP_FUNC_FAILED; 2044 2045 task = sas_alloc_slow_task(GFP_KERNEL); 2046 if (!task) 2047 return -ENOMEM; 2048 2049 task->dev = device; 2050 task->task_proto = device->tproto; 2051 task->task_done = hisi_sas_task_done; 2052 task->slow_task->timer.function = hisi_sas_tmf_timedout; 2053 task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT * HZ; 2054 add_timer(&task->slow_task->timer); 2055 2056 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id, 2057 task, abort_flag, tag, dq); 2058 if (res) { 2059 del_timer(&task->slow_task->timer); 2060 dev_err(dev, "internal task abort: executing internal task failed: %d\n", 2061 res); 2062 goto exit; 2063 } 2064 wait_for_completion(&task->slow_task->completion); 2065 res = TMF_RESP_FUNC_FAILED; 2066 2067 /* Internal abort timed out */ 2068 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { 2069 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct) 2070 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work); 2071 2072 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { 2073 struct hisi_sas_slot *slot = task->lldd_task; 2074 2075 if (slot) { 2076 struct hisi_sas_cq *cq = 2077 &hisi_hba->cq[slot->dlvry_queue]; 2078 /* 2079 * sync irq to avoid free'ing task 2080 * before using task in IO completion 2081 */ 2082 synchronize_irq(cq->irq_no); 2083 slot->task = NULL; 2084 } 2085 dev_err(dev, "internal task abort: timeout and not done.\n"); 2086 2087 res = -EIO; 2088 goto exit; 2089 } else 2090 dev_err(dev, "internal task abort: timeout.\n"); 2091 } 2092 2093 if (task->task_status.resp == SAS_TASK_COMPLETE && 2094 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) { 2095 res = TMF_RESP_FUNC_COMPLETE; 2096 goto exit; 2097 } 2098 2099 if (task->task_status.resp == SAS_TASK_COMPLETE && 2100 task->task_status.stat == TMF_RESP_FUNC_SUCC) { 2101 res = TMF_RESP_FUNC_SUCC; 2102 goto exit; 2103 } 2104 2105 exit: 2106 dev_dbg(dev, "internal task abort: task to dev %016llx task=%pK resp: 0x%x sts 0x%x\n", 2107 SAS_ADDR(device->sas_addr), task, 2108 task->task_status.resp, /* 0 is complete, -1 is undelivered */ 2109 task->task_status.stat); 2110 sas_free_task(task); 2111 2112 return res; 2113 } 2114 2115 static int 2116 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba, 2117 struct domain_device *device, 2118 int abort_flag, int tag) 2119 { 2120 struct hisi_sas_slot *slot; 2121 struct device *dev = hisi_hba->dev; 2122 struct hisi_sas_dq *dq; 2123 int i, rc; 2124 2125 switch (abort_flag) { 2126 case HISI_SAS_INT_ABT_CMD: 2127 slot = &hisi_hba->slot_info[tag]; 2128 dq = &hisi_hba->dq[slot->dlvry_queue]; 2129 return _hisi_sas_internal_task_abort(hisi_hba, device, 2130 abort_flag, tag, dq); 2131 case HISI_SAS_INT_ABT_DEV: 2132 for (i = 0; i < hisi_hba->cq_nvecs; i++) { 2133 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2134 const struct cpumask *mask = cq->irq_mask; 2135 2136 if (mask && !cpumask_intersects(cpu_online_mask, mask)) 2137 continue; 2138 dq = &hisi_hba->dq[i]; 2139 rc = _hisi_sas_internal_task_abort(hisi_hba, device, 2140 abort_flag, tag, 2141 dq); 2142 if (rc) 2143 return rc; 2144 } 2145 break; 2146 default: 2147 dev_err(dev, "Unrecognised internal abort flag (%d)\n", 2148 abort_flag); 2149 return -EINVAL; 2150 } 2151 2152 return 0; 2153 } 2154 2155 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy) 2156 { 2157 hisi_sas_port_notify_formed(sas_phy); 2158 } 2159 2160 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type, 2161 u8 reg_index, u8 reg_count, u8 *write_data) 2162 { 2163 struct hisi_hba *hisi_hba = sha->lldd_ha; 2164 2165 if (!hisi_hba->hw->write_gpio) 2166 return -EOPNOTSUPP; 2167 2168 return hisi_hba->hw->write_gpio(hisi_hba, reg_type, 2169 reg_index, reg_count, write_data); 2170 } 2171 2172 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy) 2173 { 2174 struct asd_sas_phy *sas_phy = &phy->sas_phy; 2175 struct sas_phy *sphy = sas_phy->phy; 2176 unsigned long flags; 2177 2178 phy->phy_attached = 0; 2179 phy->phy_type = 0; 2180 phy->port = NULL; 2181 2182 spin_lock_irqsave(&phy->lock, flags); 2183 if (phy->enable) 2184 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; 2185 else 2186 sphy->negotiated_linkrate = SAS_PHY_DISABLED; 2187 spin_unlock_irqrestore(&phy->lock, flags); 2188 } 2189 2190 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy, 2191 gfp_t gfp_flags) 2192 { 2193 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 2194 struct asd_sas_phy *sas_phy = &phy->sas_phy; 2195 struct device *dev = hisi_hba->dev; 2196 2197 if (rdy) { 2198 /* Phy down but ready */ 2199 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags); 2200 hisi_sas_port_notify_formed(sas_phy); 2201 } else { 2202 struct hisi_sas_port *port = phy->port; 2203 2204 if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) || 2205 phy->in_reset) { 2206 dev_info(dev, "ignore flutter phy%d down\n", phy_no); 2207 return; 2208 } 2209 /* Phy down and not ready */ 2210 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags); 2211 sas_phy_disconnected(sas_phy); 2212 2213 if (port) { 2214 if (phy->phy_type & PORT_TYPE_SAS) { 2215 int port_id = port->id; 2216 2217 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba, 2218 port_id)) 2219 port->port_attached = 0; 2220 } else if (phy->phy_type & PORT_TYPE_SATA) 2221 port->port_attached = 0; 2222 } 2223 hisi_sas_phy_disconnected(phy); 2224 } 2225 } 2226 EXPORT_SYMBOL_GPL(hisi_sas_phy_down); 2227 2228 void hisi_sas_sync_irqs(struct hisi_hba *hisi_hba) 2229 { 2230 int i; 2231 2232 for (i = 0; i < hisi_hba->cq_nvecs; i++) { 2233 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2234 2235 synchronize_irq(cq->irq_no); 2236 } 2237 } 2238 EXPORT_SYMBOL_GPL(hisi_sas_sync_irqs); 2239 2240 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type) 2241 { 2242 struct hisi_hba *hisi_hba = shost_priv(shost); 2243 2244 if (reset_type != SCSI_ADAPTER_RESET) 2245 return -EOPNOTSUPP; 2246 2247 queue_work(hisi_hba->wq, &hisi_hba->rst_work); 2248 2249 return 0; 2250 } 2251 EXPORT_SYMBOL_GPL(hisi_sas_host_reset); 2252 2253 struct scsi_transport_template *hisi_sas_stt; 2254 EXPORT_SYMBOL_GPL(hisi_sas_stt); 2255 2256 static struct sas_domain_function_template hisi_sas_transport_ops = { 2257 .lldd_dev_found = hisi_sas_dev_found, 2258 .lldd_dev_gone = hisi_sas_dev_gone, 2259 .lldd_execute_task = hisi_sas_queue_command, 2260 .lldd_control_phy = hisi_sas_control_phy, 2261 .lldd_abort_task = hisi_sas_abort_task, 2262 .lldd_abort_task_set = hisi_sas_abort_task_set, 2263 .lldd_clear_aca = hisi_sas_clear_aca, 2264 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset, 2265 .lldd_lu_reset = hisi_sas_lu_reset, 2266 .lldd_query_task = hisi_sas_query_task, 2267 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha, 2268 .lldd_port_formed = hisi_sas_port_formed, 2269 .lldd_write_gpio = hisi_sas_write_gpio, 2270 }; 2271 2272 void hisi_sas_init_mem(struct hisi_hba *hisi_hba) 2273 { 2274 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS; 2275 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint; 2276 2277 for (i = 0; i < hisi_hba->queue_count; i++) { 2278 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2279 struct hisi_sas_dq *dq = &hisi_hba->dq[i]; 2280 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i]; 2281 2282 s = sizeof(struct hisi_sas_cmd_hdr); 2283 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++) 2284 memset(&cmd_hdr[j], 0, s); 2285 2286 dq->wr_point = 0; 2287 2288 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 2289 memset(hisi_hba->complete_hdr[i], 0, s); 2290 cq->rd_point = 0; 2291 } 2292 2293 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy; 2294 memset(hisi_hba->initial_fis, 0, s); 2295 2296 s = max_command_entries * sizeof(struct hisi_sas_iost); 2297 memset(hisi_hba->iost, 0, s); 2298 2299 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 2300 memset(hisi_hba->breakpoint, 0, s); 2301 2302 s = sizeof(struct hisi_sas_sata_breakpoint); 2303 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++) 2304 memset(&sata_breakpoint[j], 0, s); 2305 } 2306 EXPORT_SYMBOL_GPL(hisi_sas_init_mem); 2307 2308 int hisi_sas_alloc(struct hisi_hba *hisi_hba) 2309 { 2310 struct device *dev = hisi_hba->dev; 2311 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS; 2312 int max_command_entries_ru, sz_slot_buf_ru; 2313 int blk_cnt, slots_per_blk; 2314 2315 sema_init(&hisi_hba->sem, 1); 2316 spin_lock_init(&hisi_hba->lock); 2317 for (i = 0; i < hisi_hba->n_phy; i++) { 2318 hisi_sas_phy_init(hisi_hba, i); 2319 hisi_hba->port[i].port_attached = 0; 2320 hisi_hba->port[i].id = -1; 2321 } 2322 2323 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 2324 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED; 2325 hisi_hba->devices[i].device_id = i; 2326 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT; 2327 } 2328 2329 for (i = 0; i < hisi_hba->queue_count; i++) { 2330 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2331 struct hisi_sas_dq *dq = &hisi_hba->dq[i]; 2332 2333 /* Completion queue structure */ 2334 cq->id = i; 2335 cq->hisi_hba = hisi_hba; 2336 2337 /* Delivery queue structure */ 2338 spin_lock_init(&dq->lock); 2339 INIT_LIST_HEAD(&dq->list); 2340 dq->id = i; 2341 dq->hisi_hba = hisi_hba; 2342 2343 /* Delivery queue */ 2344 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; 2345 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s, 2346 &hisi_hba->cmd_hdr_dma[i], 2347 GFP_KERNEL); 2348 if (!hisi_hba->cmd_hdr[i]) 2349 goto err_out; 2350 2351 /* Completion queue */ 2352 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 2353 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s, 2354 &hisi_hba->complete_hdr_dma[i], 2355 GFP_KERNEL); 2356 if (!hisi_hba->complete_hdr[i]) 2357 goto err_out; 2358 } 2359 2360 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct); 2361 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma, 2362 GFP_KERNEL); 2363 if (!hisi_hba->itct) 2364 goto err_out; 2365 2366 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries, 2367 sizeof(struct hisi_sas_slot), 2368 GFP_KERNEL); 2369 if (!hisi_hba->slot_info) 2370 goto err_out; 2371 2372 /* roundup to avoid overly large block size */ 2373 max_command_entries_ru = roundup(max_command_entries, 64); 2374 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK) 2375 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table); 2376 else 2377 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table); 2378 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64); 2379 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE); 2380 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s; 2381 slots_per_blk = s / sz_slot_buf_ru; 2382 2383 for (i = 0; i < blk_cnt; i++) { 2384 int slot_index = i * slots_per_blk; 2385 dma_addr_t buf_dma; 2386 void *buf; 2387 2388 buf = dmam_alloc_coherent(dev, s, &buf_dma, 2389 GFP_KERNEL); 2390 if (!buf) 2391 goto err_out; 2392 2393 for (j = 0; j < slots_per_blk; j++, slot_index++) { 2394 struct hisi_sas_slot *slot; 2395 2396 slot = &hisi_hba->slot_info[slot_index]; 2397 slot->buf = buf; 2398 slot->buf_dma = buf_dma; 2399 slot->idx = slot_index; 2400 2401 buf += sz_slot_buf_ru; 2402 buf_dma += sz_slot_buf_ru; 2403 } 2404 } 2405 2406 s = max_command_entries * sizeof(struct hisi_sas_iost); 2407 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma, 2408 GFP_KERNEL); 2409 if (!hisi_hba->iost) 2410 goto err_out; 2411 2412 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 2413 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s, 2414 &hisi_hba->breakpoint_dma, 2415 GFP_KERNEL); 2416 if (!hisi_hba->breakpoint) 2417 goto err_out; 2418 2419 hisi_hba->slot_index_count = max_command_entries; 2420 s = hisi_hba->slot_index_count / BITS_PER_BYTE; 2421 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL); 2422 if (!hisi_hba->slot_index_tags) 2423 goto err_out; 2424 2425 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS; 2426 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s, 2427 &hisi_hba->initial_fis_dma, 2428 GFP_KERNEL); 2429 if (!hisi_hba->initial_fis) 2430 goto err_out; 2431 2432 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint); 2433 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s, 2434 &hisi_hba->sata_breakpoint_dma, 2435 GFP_KERNEL); 2436 if (!hisi_hba->sata_breakpoint) 2437 goto err_out; 2438 2439 hisi_sas_slot_index_init(hisi_hba); 2440 hisi_hba->last_slot_index = HISI_SAS_UNRESERVED_IPTT; 2441 2442 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev)); 2443 if (!hisi_hba->wq) { 2444 dev_err(dev, "sas_alloc: failed to create workqueue\n"); 2445 goto err_out; 2446 } 2447 2448 return 0; 2449 err_out: 2450 return -ENOMEM; 2451 } 2452 EXPORT_SYMBOL_GPL(hisi_sas_alloc); 2453 2454 void hisi_sas_free(struct hisi_hba *hisi_hba) 2455 { 2456 int i; 2457 2458 for (i = 0; i < hisi_hba->n_phy; i++) { 2459 struct hisi_sas_phy *phy = &hisi_hba->phy[i]; 2460 2461 del_timer_sync(&phy->timer); 2462 } 2463 2464 if (hisi_hba->wq) 2465 destroy_workqueue(hisi_hba->wq); 2466 } 2467 EXPORT_SYMBOL_GPL(hisi_sas_free); 2468 2469 void hisi_sas_rst_work_handler(struct work_struct *work) 2470 { 2471 struct hisi_hba *hisi_hba = 2472 container_of(work, struct hisi_hba, rst_work); 2473 2474 hisi_sas_controller_reset(hisi_hba); 2475 } 2476 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler); 2477 2478 void hisi_sas_sync_rst_work_handler(struct work_struct *work) 2479 { 2480 struct hisi_sas_rst *rst = 2481 container_of(work, struct hisi_sas_rst, work); 2482 2483 if (!hisi_sas_controller_reset(rst->hisi_hba)) 2484 rst->done = true; 2485 complete(rst->completion); 2486 } 2487 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler); 2488 2489 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba) 2490 { 2491 struct device *dev = hisi_hba->dev; 2492 struct platform_device *pdev = hisi_hba->platform_dev; 2493 struct device_node *np = pdev ? pdev->dev.of_node : NULL; 2494 struct clk *refclk; 2495 2496 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr, 2497 SAS_ADDR_SIZE)) { 2498 dev_err(dev, "could not get property sas-addr\n"); 2499 return -ENOENT; 2500 } 2501 2502 if (np) { 2503 /* 2504 * These properties are only required for platform device-based 2505 * controller with DT firmware. 2506 */ 2507 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np, 2508 "hisilicon,sas-syscon"); 2509 if (IS_ERR(hisi_hba->ctrl)) { 2510 dev_err(dev, "could not get syscon\n"); 2511 return -ENOENT; 2512 } 2513 2514 if (device_property_read_u32(dev, "ctrl-reset-reg", 2515 &hisi_hba->ctrl_reset_reg)) { 2516 dev_err(dev, "could not get property ctrl-reset-reg\n"); 2517 return -ENOENT; 2518 } 2519 2520 if (device_property_read_u32(dev, "ctrl-reset-sts-reg", 2521 &hisi_hba->ctrl_reset_sts_reg)) { 2522 dev_err(dev, "could not get property ctrl-reset-sts-reg\n"); 2523 return -ENOENT; 2524 } 2525 2526 if (device_property_read_u32(dev, "ctrl-clock-ena-reg", 2527 &hisi_hba->ctrl_clock_ena_reg)) { 2528 dev_err(dev, "could not get property ctrl-clock-ena-reg\n"); 2529 return -ENOENT; 2530 } 2531 } 2532 2533 refclk = devm_clk_get(dev, NULL); 2534 if (IS_ERR(refclk)) 2535 dev_dbg(dev, "no ref clk property\n"); 2536 else 2537 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000; 2538 2539 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) { 2540 dev_err(dev, "could not get property phy-count\n"); 2541 return -ENOENT; 2542 } 2543 2544 if (device_property_read_u32(dev, "queue-count", 2545 &hisi_hba->queue_count)) { 2546 dev_err(dev, "could not get property queue-count\n"); 2547 return -ENOENT; 2548 } 2549 2550 return 0; 2551 } 2552 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info); 2553 2554 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev, 2555 const struct hisi_sas_hw *hw) 2556 { 2557 struct resource *res; 2558 struct Scsi_Host *shost; 2559 struct hisi_hba *hisi_hba; 2560 struct device *dev = &pdev->dev; 2561 int error; 2562 2563 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba)); 2564 if (!shost) { 2565 dev_err(dev, "scsi host alloc failed\n"); 2566 return NULL; 2567 } 2568 hisi_hba = shost_priv(shost); 2569 2570 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler); 2571 hisi_hba->hw = hw; 2572 hisi_hba->dev = dev; 2573 hisi_hba->platform_dev = pdev; 2574 hisi_hba->shost = shost; 2575 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha; 2576 2577 timer_setup(&hisi_hba->timer, NULL, 0); 2578 2579 if (hisi_sas_get_fw_info(hisi_hba) < 0) 2580 goto err_out; 2581 2582 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); 2583 if (error) 2584 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 2585 2586 if (error) { 2587 dev_err(dev, "No usable DMA addressing method\n"); 2588 goto err_out; 2589 } 2590 2591 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0); 2592 if (IS_ERR(hisi_hba->regs)) 2593 goto err_out; 2594 2595 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 2596 if (res) { 2597 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res); 2598 if (IS_ERR(hisi_hba->sgpio_regs)) 2599 goto err_out; 2600 } 2601 2602 if (hisi_sas_alloc(hisi_hba)) { 2603 hisi_sas_free(hisi_hba); 2604 goto err_out; 2605 } 2606 2607 return shost; 2608 err_out: 2609 scsi_host_put(shost); 2610 dev_err(dev, "shost alloc failed\n"); 2611 return NULL; 2612 } 2613 2614 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba) 2615 { 2616 if (hisi_hba->hw->interrupt_preinit) 2617 return hisi_hba->hw->interrupt_preinit(hisi_hba); 2618 return 0; 2619 } 2620 2621 int hisi_sas_probe(struct platform_device *pdev, 2622 const struct hisi_sas_hw *hw) 2623 { 2624 struct Scsi_Host *shost; 2625 struct hisi_hba *hisi_hba; 2626 struct device *dev = &pdev->dev; 2627 struct asd_sas_phy **arr_phy; 2628 struct asd_sas_port **arr_port; 2629 struct sas_ha_struct *sha; 2630 int rc, phy_nr, port_nr, i; 2631 2632 shost = hisi_sas_shost_alloc(pdev, hw); 2633 if (!shost) 2634 return -ENOMEM; 2635 2636 sha = SHOST_TO_SAS_HA(shost); 2637 hisi_hba = shost_priv(shost); 2638 platform_set_drvdata(pdev, sha); 2639 2640 phy_nr = port_nr = hisi_hba->n_phy; 2641 2642 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL); 2643 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL); 2644 if (!arr_phy || !arr_port) { 2645 rc = -ENOMEM; 2646 goto err_out_ha; 2647 } 2648 2649 sha->sas_phy = arr_phy; 2650 sha->sas_port = arr_port; 2651 sha->lldd_ha = hisi_hba; 2652 2653 shost->transportt = hisi_sas_stt; 2654 shost->max_id = HISI_SAS_MAX_DEVICES; 2655 shost->max_lun = ~0; 2656 shost->max_channel = 1; 2657 shost->max_cmd_len = 16; 2658 if (hisi_hba->hw->slot_index_alloc) { 2659 shost->can_queue = HISI_SAS_MAX_COMMANDS; 2660 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS; 2661 } else { 2662 shost->can_queue = HISI_SAS_UNRESERVED_IPTT; 2663 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT; 2664 } 2665 2666 sha->sas_ha_name = DRV_NAME; 2667 sha->dev = hisi_hba->dev; 2668 sha->lldd_module = THIS_MODULE; 2669 sha->sas_addr = &hisi_hba->sas_addr[0]; 2670 sha->num_phys = hisi_hba->n_phy; 2671 sha->core.shost = hisi_hba->shost; 2672 2673 for (i = 0; i < hisi_hba->n_phy; i++) { 2674 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy; 2675 sha->sas_port[i] = &hisi_hba->port[i].sas_port; 2676 } 2677 2678 rc = hisi_sas_interrupt_preinit(hisi_hba); 2679 if (rc) 2680 goto err_out_ha; 2681 2682 rc = scsi_add_host(shost, &pdev->dev); 2683 if (rc) 2684 goto err_out_ha; 2685 2686 rc = sas_register_ha(sha); 2687 if (rc) 2688 goto err_out_register_ha; 2689 2690 rc = hisi_hba->hw->hw_init(hisi_hba); 2691 if (rc) 2692 goto err_out_register_ha; 2693 2694 scsi_scan_host(shost); 2695 2696 return 0; 2697 2698 err_out_register_ha: 2699 scsi_remove_host(shost); 2700 err_out_ha: 2701 hisi_sas_free(hisi_hba); 2702 scsi_host_put(shost); 2703 return rc; 2704 } 2705 EXPORT_SYMBOL_GPL(hisi_sas_probe); 2706 2707 int hisi_sas_remove(struct platform_device *pdev) 2708 { 2709 struct sas_ha_struct *sha = platform_get_drvdata(pdev); 2710 struct hisi_hba *hisi_hba = sha->lldd_ha; 2711 struct Scsi_Host *shost = sha->core.shost; 2712 2713 if (timer_pending(&hisi_hba->timer)) 2714 del_timer(&hisi_hba->timer); 2715 2716 sas_unregister_ha(sha); 2717 sas_remove_host(sha->core.shost); 2718 2719 hisi_sas_free(hisi_hba); 2720 scsi_host_put(shost); 2721 return 0; 2722 } 2723 EXPORT_SYMBOL_GPL(hisi_sas_remove); 2724 2725 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE) 2726 #define DEBUGFS_ENABLE_DEFAULT "enabled" 2727 bool hisi_sas_debugfs_enable = true; 2728 u32 hisi_sas_debugfs_dump_count = 50; 2729 #else 2730 #define DEBUGFS_ENABLE_DEFAULT "disabled" 2731 bool hisi_sas_debugfs_enable; 2732 u32 hisi_sas_debugfs_dump_count = 1; 2733 #endif 2734 2735 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable); 2736 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444); 2737 MODULE_PARM_DESC(hisi_sas_debugfs_enable, 2738 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")"); 2739 2740 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count); 2741 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444); 2742 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow"); 2743 2744 struct dentry *hisi_sas_debugfs_dir; 2745 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir); 2746 2747 static __init int hisi_sas_init(void) 2748 { 2749 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops); 2750 if (!hisi_sas_stt) 2751 return -ENOMEM; 2752 2753 if (hisi_sas_debugfs_enable) { 2754 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL); 2755 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) { 2756 pr_info("hisi_sas: Limiting debugfs dump count\n"); 2757 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP; 2758 } 2759 } 2760 2761 return 0; 2762 } 2763 2764 static __exit void hisi_sas_exit(void) 2765 { 2766 sas_release_transport(hisi_sas_stt); 2767 2768 debugfs_remove(hisi_sas_debugfs_dir); 2769 } 2770 2771 module_init(hisi_sas_init); 2772 module_exit(hisi_sas_exit); 2773 2774 MODULE_LICENSE("GPL"); 2775 MODULE_AUTHOR("John Garry <john.garry@huawei.com>"); 2776 MODULE_DESCRIPTION("HISILICON SAS controller driver"); 2777 MODULE_ALIAS("platform:" DRV_NAME); 2778