1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Copyright (c) 2015 Linaro Ltd. 4 * Copyright (c) 2015 Hisilicon Limited. 5 */ 6 7#include "hisi_sas.h" 8#define DRV_NAME "hisi_sas" 9 10#define DEV_IS_GONE(dev) \ 11 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED)) 12 13static int hisi_sas_softreset_ata_disk(struct domain_device *device); 14static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func, 15 void *funcdata); 16static void hisi_sas_release_task(struct hisi_hba *hisi_hba, 17 struct domain_device *device); 18static void hisi_sas_dev_gone(struct domain_device *device); 19 20struct hisi_sas_internal_abort_data { 21 bool rst_ha_timeout; /* reset the HA for timeout */ 22}; 23 24u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction) 25{ 26 switch (fis->command) { 27 case ATA_CMD_FPDMA_WRITE: 28 case ATA_CMD_FPDMA_READ: 29 case ATA_CMD_FPDMA_RECV: 30 case ATA_CMD_FPDMA_SEND: 31 case ATA_CMD_NCQ_NON_DATA: 32 return HISI_SAS_SATA_PROTOCOL_FPDMA; 33 34 case ATA_CMD_DOWNLOAD_MICRO: 35 case ATA_CMD_ID_ATA: 36 case ATA_CMD_PMP_READ: 37 case ATA_CMD_READ_LOG_EXT: 38 case ATA_CMD_PIO_READ: 39 case ATA_CMD_PIO_READ_EXT: 40 case ATA_CMD_PMP_WRITE: 41 case ATA_CMD_WRITE_LOG_EXT: 42 case ATA_CMD_PIO_WRITE: 43 case ATA_CMD_PIO_WRITE_EXT: 44 return HISI_SAS_SATA_PROTOCOL_PIO; 45 46 case ATA_CMD_DSM: 47 case ATA_CMD_DOWNLOAD_MICRO_DMA: 48 case ATA_CMD_PMP_READ_DMA: 49 case ATA_CMD_PMP_WRITE_DMA: 50 case ATA_CMD_READ: 51 case ATA_CMD_READ_EXT: 52 case ATA_CMD_READ_LOG_DMA_EXT: 53 case ATA_CMD_READ_STREAM_DMA_EXT: 54 case ATA_CMD_TRUSTED_RCV_DMA: 55 case ATA_CMD_TRUSTED_SND_DMA: 56 case ATA_CMD_WRITE: 57 case ATA_CMD_WRITE_EXT: 58 case ATA_CMD_WRITE_FUA_EXT: 59 case ATA_CMD_WRITE_QUEUED: 60 case ATA_CMD_WRITE_LOG_DMA_EXT: 61 case ATA_CMD_WRITE_STREAM_DMA_EXT: 62 case ATA_CMD_ZAC_MGMT_IN: 63 return HISI_SAS_SATA_PROTOCOL_DMA; 64 65 case ATA_CMD_CHK_POWER: 66 case ATA_CMD_DEV_RESET: 67 case ATA_CMD_EDD: 68 case ATA_CMD_FLUSH: 69 case ATA_CMD_FLUSH_EXT: 70 case ATA_CMD_VERIFY: 71 case ATA_CMD_VERIFY_EXT: 72 case ATA_CMD_SET_FEATURES: 73 case ATA_CMD_STANDBY: 74 case ATA_CMD_STANDBYNOW1: 75 case ATA_CMD_ZAC_MGMT_OUT: 76 return HISI_SAS_SATA_PROTOCOL_NONDATA; 77 78 case ATA_CMD_SET_MAX: 79 switch (fis->features) { 80 case ATA_SET_MAX_PASSWD: 81 case ATA_SET_MAX_LOCK: 82 return HISI_SAS_SATA_PROTOCOL_PIO; 83 84 case ATA_SET_MAX_PASSWD_DMA: 85 case ATA_SET_MAX_UNLOCK_DMA: 86 return HISI_SAS_SATA_PROTOCOL_DMA; 87 88 default: 89 return HISI_SAS_SATA_PROTOCOL_NONDATA; 90 } 91 92 default: 93 { 94 if (direction == DMA_NONE) 95 return HISI_SAS_SATA_PROTOCOL_NONDATA; 96 return HISI_SAS_SATA_PROTOCOL_PIO; 97 } 98 } 99} 100EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol); 101 102void hisi_sas_sata_done(struct sas_task *task, 103 struct hisi_sas_slot *slot) 104{ 105 struct task_status_struct *ts = &task->task_status; 106 struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf; 107 struct hisi_sas_status_buffer *status_buf = 108 hisi_sas_status_buf_addr_mem(slot); 109 u8 *iu = &status_buf->iu[0]; 110 struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu; 111 112 resp->frame_len = sizeof(struct dev_to_host_fis); 113 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis)); 114 115 ts->buf_valid_size = sizeof(*resp); 116} 117EXPORT_SYMBOL_GPL(hisi_sas_sata_done); 118 119/* 120 * This function assumes linkrate mask fits in 8 bits, which it 121 * does for all HW versions supported. 122 */ 123u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max) 124{ 125 u8 rate = 0; 126 int i; 127 128 max -= SAS_LINK_RATE_1_5_GBPS; 129 for (i = 0; i <= max; i++) 130 rate |= 1 << (i * 2); 131 return rate; 132} 133EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask); 134 135static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device) 136{ 137 return device->port->ha->lldd_ha; 138} 139 140struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port) 141{ 142 return container_of(sas_port, struct hisi_sas_port, sas_port); 143} 144EXPORT_SYMBOL_GPL(to_hisi_sas_port); 145 146void hisi_sas_stop_phys(struct hisi_hba *hisi_hba) 147{ 148 int phy_no; 149 150 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) 151 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 152} 153EXPORT_SYMBOL_GPL(hisi_sas_stop_phys); 154 155static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx) 156{ 157 void *bitmap = hisi_hba->slot_index_tags; 158 159 __clear_bit(slot_idx, bitmap); 160} 161 162static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx) 163{ 164 if (hisi_hba->hw->slot_index_alloc || 165 slot_idx < HISI_SAS_RESERVED_IPTT) { 166 spin_lock(&hisi_hba->lock); 167 hisi_sas_slot_index_clear(hisi_hba, slot_idx); 168 spin_unlock(&hisi_hba->lock); 169 } 170} 171 172static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx) 173{ 174 void *bitmap = hisi_hba->slot_index_tags; 175 176 __set_bit(slot_idx, bitmap); 177} 178 179static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, 180 struct request *rq) 181{ 182 int index; 183 void *bitmap = hisi_hba->slot_index_tags; 184 185 if (rq) 186 return rq->tag + HISI_SAS_RESERVED_IPTT; 187 188 spin_lock(&hisi_hba->lock); 189 index = find_next_zero_bit(bitmap, HISI_SAS_RESERVED_IPTT, 190 hisi_hba->last_slot_index + 1); 191 if (index >= HISI_SAS_RESERVED_IPTT) { 192 index = find_next_zero_bit(bitmap, 193 HISI_SAS_RESERVED_IPTT, 194 0); 195 if (index >= HISI_SAS_RESERVED_IPTT) { 196 spin_unlock(&hisi_hba->lock); 197 return -SAS_QUEUE_FULL; 198 } 199 } 200 hisi_sas_slot_index_set(hisi_hba, index); 201 hisi_hba->last_slot_index = index; 202 spin_unlock(&hisi_hba->lock); 203 204 return index; 205} 206 207void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task, 208 struct hisi_sas_slot *slot, bool need_lock) 209{ 210 int device_id = slot->device_id; 211 struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id]; 212 213 if (task) { 214 struct device *dev = hisi_hba->dev; 215 216 if (!task->lldd_task) 217 return; 218 219 task->lldd_task = NULL; 220 221 if (!sas_protocol_ata(task->task_proto)) { 222 if (slot->n_elem) { 223 if (task->task_proto & SAS_PROTOCOL_SSP) 224 dma_unmap_sg(dev, task->scatter, 225 task->num_scatter, 226 task->data_dir); 227 else 228 dma_unmap_sg(dev, &task->smp_task.smp_req, 229 1, DMA_TO_DEVICE); 230 } 231 if (slot->n_elem_dif) { 232 struct sas_ssp_task *ssp_task = &task->ssp_task; 233 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd; 234 235 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd), 236 scsi_prot_sg_count(scsi_cmnd), 237 task->data_dir); 238 } 239 } 240 } 241 242 if (need_lock) { 243 spin_lock(&sas_dev->lock); 244 list_del_init(&slot->entry); 245 spin_unlock(&sas_dev->lock); 246 } else { 247 list_del_init(&slot->entry); 248 } 249 250 memset(slot, 0, offsetof(struct hisi_sas_slot, buf)); 251 252 hisi_sas_slot_index_free(hisi_hba, slot->idx); 253} 254EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free); 255 256static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba, 257 struct hisi_sas_slot *slot) 258{ 259 hisi_hba->hw->prep_smp(hisi_hba, slot); 260} 261 262static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba, 263 struct hisi_sas_slot *slot) 264{ 265 hisi_hba->hw->prep_ssp(hisi_hba, slot); 266} 267 268static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba, 269 struct hisi_sas_slot *slot) 270{ 271 hisi_hba->hw->prep_stp(hisi_hba, slot); 272} 273 274static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba, 275 struct hisi_sas_slot *slot) 276{ 277 hisi_hba->hw->prep_abort(hisi_hba, slot); 278} 279 280static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba, 281 struct sas_task *task, int n_elem) 282{ 283 struct device *dev = hisi_hba->dev; 284 285 if (!sas_protocol_ata(task->task_proto) && n_elem) { 286 if (task->num_scatter) { 287 dma_unmap_sg(dev, task->scatter, task->num_scatter, 288 task->data_dir); 289 } else if (task->task_proto & SAS_PROTOCOL_SMP) { 290 dma_unmap_sg(dev, &task->smp_task.smp_req, 291 1, DMA_TO_DEVICE); 292 } 293 } 294} 295 296static int hisi_sas_dma_map(struct hisi_hba *hisi_hba, 297 struct sas_task *task, int *n_elem) 298{ 299 struct device *dev = hisi_hba->dev; 300 int rc; 301 302 if (sas_protocol_ata(task->task_proto)) { 303 *n_elem = task->num_scatter; 304 } else { 305 unsigned int req_len; 306 307 if (task->num_scatter) { 308 *n_elem = dma_map_sg(dev, task->scatter, 309 task->num_scatter, task->data_dir); 310 if (!*n_elem) { 311 rc = -ENOMEM; 312 goto prep_out; 313 } 314 } else if (task->task_proto & SAS_PROTOCOL_SMP) { 315 *n_elem = dma_map_sg(dev, &task->smp_task.smp_req, 316 1, DMA_TO_DEVICE); 317 if (!*n_elem) { 318 rc = -ENOMEM; 319 goto prep_out; 320 } 321 req_len = sg_dma_len(&task->smp_task.smp_req); 322 if (req_len & 0x3) { 323 rc = -EINVAL; 324 goto err_out_dma_unmap; 325 } 326 } 327 } 328 329 if (*n_elem > HISI_SAS_SGE_PAGE_CNT) { 330 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n", 331 *n_elem); 332 rc = -EINVAL; 333 goto err_out_dma_unmap; 334 } 335 return 0; 336 337err_out_dma_unmap: 338 /* It would be better to call dma_unmap_sg() here, but it's messy */ 339 hisi_sas_dma_unmap(hisi_hba, task, *n_elem); 340prep_out: 341 return rc; 342} 343 344static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba, 345 struct sas_task *task, int n_elem_dif) 346{ 347 struct device *dev = hisi_hba->dev; 348 349 if (n_elem_dif) { 350 struct sas_ssp_task *ssp_task = &task->ssp_task; 351 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd; 352 353 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd), 354 scsi_prot_sg_count(scsi_cmnd), 355 task->data_dir); 356 } 357} 358 359static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba, 360 int *n_elem_dif, struct sas_task *task) 361{ 362 struct device *dev = hisi_hba->dev; 363 struct sas_ssp_task *ssp_task; 364 struct scsi_cmnd *scsi_cmnd; 365 int rc; 366 367 if (task->num_scatter) { 368 ssp_task = &task->ssp_task; 369 scsi_cmnd = ssp_task->cmd; 370 371 if (scsi_prot_sg_count(scsi_cmnd)) { 372 *n_elem_dif = dma_map_sg(dev, 373 scsi_prot_sglist(scsi_cmnd), 374 scsi_prot_sg_count(scsi_cmnd), 375 task->data_dir); 376 377 if (!*n_elem_dif) 378 return -ENOMEM; 379 380 if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) { 381 dev_err(dev, "task prep: n_elem_dif(%d) too large\n", 382 *n_elem_dif); 383 rc = -EINVAL; 384 goto err_out_dif_dma_unmap; 385 } 386 } 387 } 388 389 return 0; 390 391err_out_dif_dma_unmap: 392 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd), 393 scsi_prot_sg_count(scsi_cmnd), task->data_dir); 394 return rc; 395} 396 397static 398void hisi_sas_task_deliver(struct hisi_hba *hisi_hba, 399 struct hisi_sas_slot *slot, 400 struct hisi_sas_dq *dq, 401 struct hisi_sas_device *sas_dev) 402{ 403 struct hisi_sas_cmd_hdr *cmd_hdr_base; 404 int dlvry_queue_slot, dlvry_queue; 405 struct sas_task *task = slot->task; 406 int wr_q_index; 407 408 spin_lock(&dq->lock); 409 wr_q_index = dq->wr_point; 410 dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS; 411 list_add_tail(&slot->delivery, &dq->list); 412 spin_unlock(&dq->lock); 413 spin_lock(&sas_dev->lock); 414 list_add_tail(&slot->entry, &sas_dev->list); 415 spin_unlock(&sas_dev->lock); 416 417 dlvry_queue = dq->id; 418 dlvry_queue_slot = wr_q_index; 419 420 slot->device_id = sas_dev->device_id; 421 slot->dlvry_queue = dlvry_queue; 422 slot->dlvry_queue_slot = dlvry_queue_slot; 423 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue]; 424 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot]; 425 426 task->lldd_task = slot; 427 428 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr)); 429 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ); 430 memset(hisi_sas_status_buf_addr_mem(slot), 0, 431 sizeof(struct hisi_sas_err_record)); 432 433 switch (task->task_proto) { 434 case SAS_PROTOCOL_SMP: 435 hisi_sas_task_prep_smp(hisi_hba, slot); 436 break; 437 case SAS_PROTOCOL_SSP: 438 hisi_sas_task_prep_ssp(hisi_hba, slot); 439 break; 440 case SAS_PROTOCOL_SATA: 441 case SAS_PROTOCOL_STP: 442 case SAS_PROTOCOL_STP_ALL: 443 hisi_sas_task_prep_ata(hisi_hba, slot); 444 break; 445 case SAS_PROTOCOL_INTERNAL_ABORT: 446 hisi_sas_task_prep_abort(hisi_hba, slot); 447 break; 448 default: 449 return; 450 } 451 452 /* Make slot memories observable before marking as ready */ 453 smp_wmb(); 454 WRITE_ONCE(slot->ready, 1); 455 456 spin_lock(&dq->lock); 457 hisi_hba->hw->start_delivery(dq); 458 spin_unlock(&dq->lock); 459} 460 461static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) 462{ 463 int n_elem = 0, n_elem_dif = 0; 464 struct domain_device *device = task->dev; 465 struct asd_sas_port *sas_port = device->port; 466 struct hisi_sas_device *sas_dev = device->lldd_dev; 467 bool internal_abort = sas_is_internal_abort(task); 468 struct hisi_sas_dq *dq = NULL; 469 struct hisi_sas_port *port; 470 struct hisi_hba *hisi_hba; 471 struct hisi_sas_slot *slot; 472 struct request *rq = NULL; 473 struct device *dev; 474 int rc; 475 476 if (!sas_port) { 477 struct task_status_struct *ts = &task->task_status; 478 479 ts->resp = SAS_TASK_UNDELIVERED; 480 ts->stat = SAS_PHY_DOWN; 481 /* 482 * libsas will use dev->port, should 483 * not call task_done for sata 484 */ 485 if (device->dev_type != SAS_SATA_DEV && !internal_abort) 486 task->task_done(task); 487 return -ECOMM; 488 } 489 490 hisi_hba = dev_to_hisi_hba(device); 491 dev = hisi_hba->dev; 492 493 switch (task->task_proto) { 494 case SAS_PROTOCOL_SSP: 495 case SAS_PROTOCOL_SMP: 496 case SAS_PROTOCOL_SATA: 497 case SAS_PROTOCOL_STP: 498 case SAS_PROTOCOL_STP_ALL: 499 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) { 500 if (!gfpflags_allow_blocking(gfp_flags)) 501 return -EINVAL; 502 503 down(&hisi_hba->sem); 504 up(&hisi_hba->sem); 505 } 506 507 if (DEV_IS_GONE(sas_dev)) { 508 if (sas_dev) 509 dev_info(dev, "task prep: device %d not ready\n", 510 sas_dev->device_id); 511 else 512 dev_info(dev, "task prep: device %016llx not ready\n", 513 SAS_ADDR(device->sas_addr)); 514 515 return -ECOMM; 516 } 517 518 port = to_hisi_sas_port(sas_port); 519 if (!port->port_attached) { 520 dev_info(dev, "task prep: %s port%d not attach device\n", 521 dev_is_sata(device) ? "SATA/STP" : "SAS", 522 device->port->id); 523 524 return -ECOMM; 525 } 526 527 rq = sas_task_find_rq(task); 528 if (rq) { 529 unsigned int dq_index; 530 u32 blk_tag; 531 532 blk_tag = blk_mq_unique_tag(rq); 533 dq_index = blk_mq_unique_tag_to_hwq(blk_tag); 534 dq = &hisi_hba->dq[dq_index]; 535 } else { 536 int queue; 537 538 if (hisi_hba->iopoll_q_cnt) { 539 /* 540 * Use interrupt queue (queue 0) to deliver and complete 541 * internal IOs of libsas or libata when there is at least 542 * one iopoll queue 543 */ 544 queue = 0; 545 } else { 546 struct Scsi_Host *shost = hisi_hba->shost; 547 struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT]; 548 549 queue = qmap->mq_map[raw_smp_processor_id()]; 550 } 551 dq = &hisi_hba->dq[queue]; 552 } 553 break; 554 case SAS_PROTOCOL_INTERNAL_ABORT: 555 if (!hisi_hba->hw->prep_abort) 556 return TMF_RESP_FUNC_FAILED; 557 558 if (test_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags)) 559 return -EIO; 560 561 hisi_hba = dev_to_hisi_hba(device); 562 563 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) 564 return -EINVAL; 565 566 port = to_hisi_sas_port(sas_port); 567 dq = &hisi_hba->dq[task->abort_task.qid]; 568 break; 569 default: 570 dev_err(hisi_hba->dev, "task prep: unknown/unsupported proto (0x%x)\n", 571 task->task_proto); 572 return -EINVAL; 573 } 574 575 rc = hisi_sas_dma_map(hisi_hba, task, &n_elem); 576 if (rc < 0) 577 goto prep_out; 578 579 if (!sas_protocol_ata(task->task_proto)) { 580 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task); 581 if (rc < 0) 582 goto err_out_dma_unmap; 583 } 584 585 if (!internal_abort && hisi_hba->hw->slot_index_alloc) 586 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device); 587 else 588 rc = hisi_sas_slot_index_alloc(hisi_hba, rq); 589 590 if (rc < 0) 591 goto err_out_dif_dma_unmap; 592 593 slot = &hisi_hba->slot_info[rc]; 594 slot->n_elem = n_elem; 595 slot->n_elem_dif = n_elem_dif; 596 slot->task = task; 597 slot->port = port; 598 599 slot->tmf = task->tmf; 600 slot->is_internal = !!task->tmf || internal_abort; 601 602 /* protect task_prep and start_delivery sequence */ 603 hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev); 604 605 return 0; 606 607err_out_dif_dma_unmap: 608 if (!sas_protocol_ata(task->task_proto)) 609 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif); 610err_out_dma_unmap: 611 hisi_sas_dma_unmap(hisi_hba, task, n_elem); 612prep_out: 613 dev_err(dev, "task exec: failed[%d]!\n", rc); 614 return rc; 615} 616 617static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no, 618 gfp_t gfp_flags) 619{ 620 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 621 struct asd_sas_phy *sas_phy = &phy->sas_phy; 622 623 if (!phy->phy_attached) 624 return; 625 626 sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags); 627 628 if (sas_phy->phy) { 629 struct sas_phy *sphy = sas_phy->phy; 630 631 sphy->negotiated_linkrate = sas_phy->linkrate; 632 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS; 633 sphy->maximum_linkrate_hw = 634 hisi_hba->hw->phy_get_max_linkrate(); 635 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) 636 sphy->minimum_linkrate = phy->minimum_linkrate; 637 638 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) 639 sphy->maximum_linkrate = phy->maximum_linkrate; 640 } 641 642 if (phy->phy_type & PORT_TYPE_SAS) { 643 struct sas_identify_frame *id; 644 645 id = (struct sas_identify_frame *)phy->frame_rcvd; 646 id->dev_type = phy->identify.device_type; 647 id->initiator_bits = SAS_PROTOCOL_ALL; 648 id->target_bits = phy->identify.target_port_protocols; 649 } else if (phy->phy_type & PORT_TYPE_SATA) { 650 /* Nothing */ 651 } 652 653 sas_phy->frame_rcvd_size = phy->frame_rcvd_size; 654 sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags); 655} 656 657static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device) 658{ 659 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 660 struct hisi_sas_device *sas_dev = NULL; 661 int last = hisi_hba->last_dev_id; 662 int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES; 663 int i; 664 665 spin_lock(&hisi_hba->lock); 666 for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) { 667 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) { 668 int queue = i % hisi_hba->queue_count; 669 struct hisi_sas_dq *dq = &hisi_hba->dq[queue]; 670 671 hisi_hba->devices[i].device_id = i; 672 sas_dev = &hisi_hba->devices[i]; 673 sas_dev->dev_status = HISI_SAS_DEV_INIT; 674 sas_dev->dev_type = device->dev_type; 675 sas_dev->hisi_hba = hisi_hba; 676 sas_dev->sas_device = device; 677 sas_dev->dq = dq; 678 spin_lock_init(&sas_dev->lock); 679 INIT_LIST_HEAD(&hisi_hba->devices[i].list); 680 break; 681 } 682 i++; 683 } 684 hisi_hba->last_dev_id = i; 685 spin_unlock(&hisi_hba->lock); 686 687 return sas_dev; 688} 689 690static void hisi_sas_sync_poll_cq(struct hisi_sas_cq *cq) 691{ 692 /* make sure CQ entries being processed are processed to completion */ 693 spin_lock(&cq->poll_lock); 694 spin_unlock(&cq->poll_lock); 695} 696 697static bool hisi_sas_queue_is_poll(struct hisi_sas_cq *cq) 698{ 699 struct hisi_hba *hisi_hba = cq->hisi_hba; 700 701 if (cq->id < hisi_hba->queue_count - hisi_hba->iopoll_q_cnt) 702 return false; 703 return true; 704} 705 706static void hisi_sas_sync_cq(struct hisi_sas_cq *cq) 707{ 708 if (hisi_sas_queue_is_poll(cq)) 709 hisi_sas_sync_poll_cq(cq); 710 else 711 synchronize_irq(cq->irq_no); 712} 713 714void hisi_sas_sync_poll_cqs(struct hisi_hba *hisi_hba) 715{ 716 int i; 717 718 for (i = 0; i < hisi_hba->queue_count; i++) { 719 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 720 721 if (hisi_sas_queue_is_poll(cq)) 722 hisi_sas_sync_poll_cq(cq); 723 } 724} 725EXPORT_SYMBOL_GPL(hisi_sas_sync_poll_cqs); 726 727void hisi_sas_sync_cqs(struct hisi_hba *hisi_hba) 728{ 729 int i; 730 731 for (i = 0; i < hisi_hba->queue_count; i++) { 732 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 733 734 hisi_sas_sync_cq(cq); 735 } 736} 737EXPORT_SYMBOL_GPL(hisi_sas_sync_cqs); 738 739static void hisi_sas_tmf_aborted(struct sas_task *task) 740{ 741 struct hisi_sas_slot *slot = task->lldd_task; 742 struct domain_device *device = task->dev; 743 struct hisi_sas_device *sas_dev = device->lldd_dev; 744 struct hisi_hba *hisi_hba = sas_dev->hisi_hba; 745 746 if (slot) { 747 struct hisi_sas_cq *cq = 748 &hisi_hba->cq[slot->dlvry_queue]; 749 /* 750 * sync irq or poll queue to avoid free'ing task 751 * before using task in IO completion 752 */ 753 hisi_sas_sync_cq(cq); 754 slot->task = NULL; 755 } 756} 757 758#define HISI_SAS_DISK_RECOVER_CNT 3 759static int hisi_sas_init_device(struct domain_device *device) 760{ 761 int rc = TMF_RESP_FUNC_COMPLETE; 762 struct scsi_lun lun; 763 int retry = HISI_SAS_DISK_RECOVER_CNT; 764 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 765 766 switch (device->dev_type) { 767 case SAS_END_DEVICE: 768 int_to_scsilun(0, &lun); 769 770 while (retry-- > 0) { 771 rc = sas_abort_task_set(device, lun.scsi_lun); 772 if (rc == TMF_RESP_FUNC_COMPLETE) { 773 hisi_sas_release_task(hisi_hba, device); 774 break; 775 } 776 } 777 break; 778 case SAS_SATA_DEV: 779 case SAS_SATA_PM: 780 case SAS_SATA_PM_PORT: 781 case SAS_SATA_PENDING: 782 /* 783 * If an expander is swapped when a SATA disk is attached then 784 * we should issue a hard reset to clear previous affiliation 785 * of STP target port, see SPL (chapter 6.19.4). 786 * 787 * However we don't need to issue a hard reset here for these 788 * reasons: 789 * a. When probing the device, libsas/libata already issues a 790 * hard reset in sas_probe_sata() -> ata_port_probe(). 791 * Note that in hisi_sas_debug_I_T_nexus_reset() we take care 792 * to issue a hard reset by checking the dev status (== INIT). 793 * b. When resetting the controller, this is simply unnecessary. 794 */ 795 while (retry-- > 0) { 796 rc = hisi_sas_softreset_ata_disk(device); 797 if (!rc) 798 break; 799 } 800 break; 801 default: 802 break; 803 } 804 805 return rc; 806} 807 808int hisi_sas_slave_alloc(struct scsi_device *sdev) 809{ 810 struct domain_device *ddev = sdev_to_domain_dev(sdev); 811 struct hisi_sas_device *sas_dev = ddev->lldd_dev; 812 int rc; 813 814 rc = sas_slave_alloc(sdev); 815 if (rc) 816 return rc; 817 818 rc = hisi_sas_init_device(ddev); 819 if (rc) 820 return rc; 821 sas_dev->dev_status = HISI_SAS_DEV_NORMAL; 822 return 0; 823} 824EXPORT_SYMBOL_GPL(hisi_sas_slave_alloc); 825 826static int hisi_sas_dev_found(struct domain_device *device) 827{ 828 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 829 struct domain_device *parent_dev = device->parent; 830 struct hisi_sas_device *sas_dev; 831 struct device *dev = hisi_hba->dev; 832 int rc; 833 834 if (hisi_hba->hw->alloc_dev) 835 sas_dev = hisi_hba->hw->alloc_dev(device); 836 else 837 sas_dev = hisi_sas_alloc_dev(device); 838 if (!sas_dev) { 839 dev_err(dev, "fail alloc dev: max support %d devices\n", 840 HISI_SAS_MAX_DEVICES); 841 return -EINVAL; 842 } 843 844 device->lldd_dev = sas_dev; 845 hisi_hba->hw->setup_itct(hisi_hba, sas_dev); 846 847 if (parent_dev && dev_is_expander(parent_dev->dev_type)) { 848 int phy_no; 849 850 phy_no = sas_find_attached_phy_id(&parent_dev->ex_dev, device); 851 if (phy_no < 0) { 852 dev_info(dev, "dev found: no attached " 853 "dev:%016llx at ex:%016llx\n", 854 SAS_ADDR(device->sas_addr), 855 SAS_ADDR(parent_dev->sas_addr)); 856 rc = phy_no; 857 goto err_out; 858 } 859 } 860 861 dev_info(dev, "dev[%d:%x] found\n", 862 sas_dev->device_id, sas_dev->dev_type); 863 864 return 0; 865 866err_out: 867 hisi_sas_dev_gone(device); 868 return rc; 869} 870 871int hisi_sas_slave_configure(struct scsi_device *sdev) 872{ 873 struct domain_device *dev = sdev_to_domain_dev(sdev); 874 int ret = sas_slave_configure(sdev); 875 876 if (ret) 877 return ret; 878 if (!dev_is_sata(dev)) 879 sas_change_queue_depth(sdev, 64); 880 881 return 0; 882} 883EXPORT_SYMBOL_GPL(hisi_sas_slave_configure); 884 885void hisi_sas_scan_start(struct Scsi_Host *shost) 886{ 887 struct hisi_hba *hisi_hba = shost_priv(shost); 888 889 hisi_hba->hw->phys_init(hisi_hba); 890} 891EXPORT_SYMBOL_GPL(hisi_sas_scan_start); 892 893int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time) 894{ 895 struct hisi_hba *hisi_hba = shost_priv(shost); 896 struct sas_ha_struct *sha = &hisi_hba->sha; 897 898 /* Wait for PHY up interrupt to occur */ 899 if (time < HZ) 900 return 0; 901 902 sas_drain_work(sha); 903 return 1; 904} 905EXPORT_SYMBOL_GPL(hisi_sas_scan_finished); 906 907static void hisi_sas_phyup_work_common(struct work_struct *work, 908 enum hisi_sas_phy_event event) 909{ 910 struct hisi_sas_phy *phy = 911 container_of(work, typeof(*phy), works[event]); 912 struct hisi_hba *hisi_hba = phy->hisi_hba; 913 struct asd_sas_phy *sas_phy = &phy->sas_phy; 914 int phy_no = sas_phy->id; 915 916 phy->wait_phyup_cnt = 0; 917 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP) 918 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no); 919 hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL); 920} 921 922static void hisi_sas_phyup_work(struct work_struct *work) 923{ 924 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP); 925} 926 927static void hisi_sas_linkreset_work(struct work_struct *work) 928{ 929 struct hisi_sas_phy *phy = 930 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]); 931 struct asd_sas_phy *sas_phy = &phy->sas_phy; 932 933 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL); 934} 935 936static void hisi_sas_phyup_pm_work(struct work_struct *work) 937{ 938 struct hisi_sas_phy *phy = 939 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]); 940 struct hisi_hba *hisi_hba = phy->hisi_hba; 941 struct device *dev = hisi_hba->dev; 942 943 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM); 944 pm_runtime_put_sync(dev); 945} 946 947static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = { 948 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work, 949 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work, 950 [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work, 951}; 952 953bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy, 954 enum hisi_sas_phy_event event) 955{ 956 struct hisi_hba *hisi_hba = phy->hisi_hba; 957 958 if (WARN_ON(event >= HISI_PHYES_NUM)) 959 return false; 960 961 return queue_work(hisi_hba->wq, &phy->works[event]); 962} 963EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event); 964 965static void hisi_sas_wait_phyup_timedout(struct timer_list *t) 966{ 967 struct hisi_sas_phy *phy = from_timer(phy, t, timer); 968 struct hisi_hba *hisi_hba = phy->hisi_hba; 969 struct device *dev = hisi_hba->dev; 970 int phy_no = phy->sas_phy.id; 971 972 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no); 973 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET); 974} 975 976#define HISI_SAS_WAIT_PHYUP_RETRIES 10 977 978void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no) 979{ 980 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 981 struct device *dev = hisi_hba->dev; 982 unsigned long flags; 983 984 dev_dbg(dev, "phy%d OOB ready\n", phy_no); 985 spin_lock_irqsave(&phy->lock, flags); 986 if (phy->phy_attached) { 987 spin_unlock_irqrestore(&phy->lock, flags); 988 return; 989 } 990 991 if (!timer_pending(&phy->timer)) { 992 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) { 993 phy->wait_phyup_cnt++; 994 phy->timer.expires = jiffies + 995 HISI_SAS_WAIT_PHYUP_TIMEOUT; 996 add_timer(&phy->timer); 997 spin_unlock_irqrestore(&phy->lock, flags); 998 return; 999 } 1000 1001 dev_warn(dev, "phy%d failed to come up %d times, giving up\n", 1002 phy_no, phy->wait_phyup_cnt); 1003 phy->wait_phyup_cnt = 0; 1004 } 1005 spin_unlock_irqrestore(&phy->lock, flags); 1006} 1007 1008EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready); 1009 1010static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no) 1011{ 1012 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1013 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1014 int i; 1015 1016 phy->hisi_hba = hisi_hba; 1017 phy->port = NULL; 1018 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS; 1019 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate(); 1020 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0; 1021 sas_phy->iproto = SAS_PROTOCOL_ALL; 1022 sas_phy->tproto = 0; 1023 sas_phy->role = PHY_ROLE_INITIATOR; 1024 sas_phy->oob_mode = OOB_NOT_CONNECTED; 1025 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN; 1026 sas_phy->id = phy_no; 1027 sas_phy->sas_addr = &hisi_hba->sas_addr[0]; 1028 sas_phy->frame_rcvd = &phy->frame_rcvd[0]; 1029 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata; 1030 sas_phy->lldd_phy = phy; 1031 1032 for (i = 0; i < HISI_PHYES_NUM; i++) 1033 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]); 1034 1035 spin_lock_init(&phy->lock); 1036 1037 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0); 1038} 1039 1040/* Wrapper to ensure we track hisi_sas_phy.enable properly */ 1041void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable) 1042{ 1043 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1044 struct asd_sas_phy *aphy = &phy->sas_phy; 1045 struct sas_phy *sphy = aphy->phy; 1046 unsigned long flags; 1047 1048 spin_lock_irqsave(&phy->lock, flags); 1049 1050 if (enable) { 1051 /* We may have been enabled already; if so, don't touch */ 1052 if (!phy->enable) 1053 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; 1054 hisi_hba->hw->phy_start(hisi_hba, phy_no); 1055 } else { 1056 sphy->negotiated_linkrate = SAS_PHY_DISABLED; 1057 hisi_hba->hw->phy_disable(hisi_hba, phy_no); 1058 } 1059 phy->enable = enable; 1060 spin_unlock_irqrestore(&phy->lock, flags); 1061} 1062EXPORT_SYMBOL_GPL(hisi_sas_phy_enable); 1063 1064static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy) 1065{ 1066 struct hisi_sas_phy *phy = sas_phy->lldd_phy; 1067 struct asd_sas_port *sas_port = sas_phy->port; 1068 struct hisi_sas_port *port; 1069 1070 if (!sas_port) 1071 return; 1072 1073 port = to_hisi_sas_port(sas_port); 1074 port->port_attached = 1; 1075 port->id = phy->port_id; 1076 phy->port = port; 1077 sas_port->lldd_port = port; 1078} 1079 1080static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task, 1081 struct hisi_sas_slot *slot, bool need_lock) 1082{ 1083 if (task) { 1084 unsigned long flags; 1085 struct task_status_struct *ts; 1086 1087 ts = &task->task_status; 1088 1089 ts->resp = SAS_TASK_COMPLETE; 1090 ts->stat = SAS_ABORTED_TASK; 1091 spin_lock_irqsave(&task->task_state_lock, flags); 1092 task->task_state_flags &= ~SAS_TASK_STATE_PENDING; 1093 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP) 1094 task->task_state_flags |= SAS_TASK_STATE_DONE; 1095 spin_unlock_irqrestore(&task->task_state_lock, flags); 1096 } 1097 1098 hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock); 1099} 1100 1101static void hisi_sas_release_task(struct hisi_hba *hisi_hba, 1102 struct domain_device *device) 1103{ 1104 struct hisi_sas_slot *slot, *slot2; 1105 struct hisi_sas_device *sas_dev = device->lldd_dev; 1106 1107 spin_lock(&sas_dev->lock); 1108 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry) 1109 hisi_sas_do_release_task(hisi_hba, slot->task, slot, false); 1110 1111 spin_unlock(&sas_dev->lock); 1112} 1113 1114void hisi_sas_release_tasks(struct hisi_hba *hisi_hba) 1115{ 1116 struct hisi_sas_device *sas_dev; 1117 struct domain_device *device; 1118 int i; 1119 1120 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1121 sas_dev = &hisi_hba->devices[i]; 1122 device = sas_dev->sas_device; 1123 1124 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || 1125 !device) 1126 continue; 1127 1128 hisi_sas_release_task(hisi_hba, device); 1129 } 1130} 1131EXPORT_SYMBOL_GPL(hisi_sas_release_tasks); 1132 1133static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba, 1134 struct domain_device *device) 1135{ 1136 if (hisi_hba->hw->dereg_device) 1137 hisi_hba->hw->dereg_device(hisi_hba, device); 1138} 1139 1140static int 1141hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev, 1142 bool rst_ha_timeout) 1143{ 1144 struct hisi_sas_internal_abort_data data = { rst_ha_timeout }; 1145 struct domain_device *device = sas_dev->sas_device; 1146 struct hisi_hba *hisi_hba = sas_dev->hisi_hba; 1147 int i, rc; 1148 1149 for (i = 0; i < hisi_hba->cq_nvecs; i++) { 1150 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 1151 const struct cpumask *mask = cq->irq_mask; 1152 1153 if (mask && !cpumask_intersects(cpu_online_mask, mask)) 1154 continue; 1155 rc = sas_execute_internal_abort_dev(device, i, &data); 1156 if (rc) 1157 return rc; 1158 } 1159 1160 return 0; 1161} 1162 1163static void hisi_sas_dev_gone(struct domain_device *device) 1164{ 1165 struct hisi_sas_device *sas_dev = device->lldd_dev; 1166 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1167 struct device *dev = hisi_hba->dev; 1168 int ret = 0; 1169 1170 dev_info(dev, "dev[%d:%x] is gone\n", 1171 sas_dev->device_id, sas_dev->dev_type); 1172 1173 down(&hisi_hba->sem); 1174 if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) { 1175 hisi_sas_internal_task_abort_dev(sas_dev, true); 1176 1177 hisi_sas_dereg_device(hisi_hba, device); 1178 1179 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev); 1180 device->lldd_dev = NULL; 1181 } 1182 1183 if (hisi_hba->hw->free_device) 1184 hisi_hba->hw->free_device(sas_dev); 1185 1186 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */ 1187 if (!ret) 1188 sas_dev->dev_type = SAS_PHY_UNUSED; 1189 sas_dev->sas_device = NULL; 1190 up(&hisi_hba->sem); 1191} 1192 1193static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no, 1194 struct sas_phy_linkrates *r) 1195{ 1196 struct sas_phy_linkrates _r; 1197 1198 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1199 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1200 enum sas_linkrate min, max; 1201 1202 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS) 1203 return -EINVAL; 1204 1205 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) { 1206 max = sas_phy->phy->maximum_linkrate; 1207 min = r->minimum_linkrate; 1208 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) { 1209 max = r->maximum_linkrate; 1210 min = sas_phy->phy->minimum_linkrate; 1211 } else 1212 return -EINVAL; 1213 1214 _r.maximum_linkrate = max; 1215 _r.minimum_linkrate = min; 1216 1217 sas_phy->phy->maximum_linkrate = max; 1218 sas_phy->phy->minimum_linkrate = min; 1219 1220 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 1221 msleep(100); 1222 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r); 1223 hisi_sas_phy_enable(hisi_hba, phy_no, 1); 1224 1225 return 0; 1226} 1227 1228static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func, 1229 void *funcdata) 1230{ 1231 struct hisi_sas_phy *phy = container_of(sas_phy, 1232 struct hisi_sas_phy, sas_phy); 1233 struct sas_ha_struct *sas_ha = sas_phy->ha; 1234 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 1235 struct device *dev = hisi_hba->dev; 1236 DECLARE_COMPLETION_ONSTACK(completion); 1237 int phy_no = sas_phy->id; 1238 u8 sts = phy->phy_attached; 1239 int ret = 0; 1240 1241 down(&hisi_hba->sem); 1242 phy->reset_completion = &completion; 1243 1244 switch (func) { 1245 case PHY_FUNC_HARD_RESET: 1246 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no); 1247 break; 1248 1249 case PHY_FUNC_LINK_RESET: 1250 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 1251 msleep(100); 1252 hisi_sas_phy_enable(hisi_hba, phy_no, 1); 1253 break; 1254 1255 case PHY_FUNC_DISABLE: 1256 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 1257 goto out; 1258 1259 case PHY_FUNC_SET_LINK_RATE: 1260 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata); 1261 break; 1262 1263 case PHY_FUNC_GET_EVENTS: 1264 if (hisi_hba->hw->get_events) { 1265 hisi_hba->hw->get_events(hisi_hba, phy_no); 1266 goto out; 1267 } 1268 fallthrough; 1269 case PHY_FUNC_RELEASE_SPINUP_HOLD: 1270 default: 1271 ret = -EOPNOTSUPP; 1272 goto out; 1273 } 1274 1275 if (sts && !wait_for_completion_timeout(&completion, 1276 HISI_SAS_WAIT_PHYUP_TIMEOUT)) { 1277 dev_warn(dev, "phy%d wait phyup timed out for func %d\n", 1278 phy_no, func); 1279 if (phy->in_reset) 1280 ret = -ETIMEDOUT; 1281 } 1282 1283out: 1284 phy->reset_completion = NULL; 1285 1286 up(&hisi_hba->sem); 1287 return ret; 1288} 1289 1290static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev, 1291 bool reset, int pmp, u8 *fis) 1292{ 1293 struct ata_taskfile tf; 1294 1295 ata_tf_init(dev, &tf); 1296 if (reset) 1297 tf.ctl |= ATA_SRST; 1298 else 1299 tf.ctl &= ~ATA_SRST; 1300 tf.command = ATA_CMD_DEV_RESET; 1301 ata_tf_to_fis(&tf, pmp, 0, fis); 1302} 1303 1304static int hisi_sas_softreset_ata_disk(struct domain_device *device) 1305{ 1306 u8 fis[20] = {0}; 1307 struct ata_port *ap = device->sata_dev.ap; 1308 struct ata_link *link; 1309 int rc = TMF_RESP_FUNC_FAILED; 1310 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1311 struct device *dev = hisi_hba->dev; 1312 1313 ata_for_each_link(link, ap, EDGE) { 1314 int pmp = sata_srst_pmp(link); 1315 1316 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis); 1317 rc = sas_execute_ata_cmd(device, fis, -1); 1318 if (rc != TMF_RESP_FUNC_COMPLETE) 1319 break; 1320 } 1321 1322 if (rc == TMF_RESP_FUNC_COMPLETE) { 1323 ata_for_each_link(link, ap, EDGE) { 1324 int pmp = sata_srst_pmp(link); 1325 1326 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis); 1327 rc = sas_execute_ata_cmd(device, fis, -1); 1328 if (rc != TMF_RESP_FUNC_COMPLETE) 1329 dev_err(dev, "ata disk %016llx de-reset failed\n", 1330 SAS_ADDR(device->sas_addr)); 1331 } 1332 } else { 1333 dev_err(dev, "ata disk %016llx reset failed\n", 1334 SAS_ADDR(device->sas_addr)); 1335 } 1336 1337 if (rc == TMF_RESP_FUNC_COMPLETE) 1338 hisi_sas_release_task(hisi_hba, device); 1339 1340 return rc; 1341} 1342 1343static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba) 1344{ 1345 u32 state = hisi_hba->hw->get_phys_state(hisi_hba); 1346 int i; 1347 1348 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1349 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1350 struct domain_device *device = sas_dev->sas_device; 1351 struct asd_sas_port *sas_port; 1352 struct hisi_sas_port *port; 1353 struct hisi_sas_phy *phy = NULL; 1354 struct asd_sas_phy *sas_phy; 1355 1356 if ((sas_dev->dev_type == SAS_PHY_UNUSED) 1357 || !device || !device->port) 1358 continue; 1359 1360 sas_port = device->port; 1361 port = to_hisi_sas_port(sas_port); 1362 1363 spin_lock(&sas_port->phy_list_lock); 1364 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) 1365 if (state & BIT(sas_phy->id)) { 1366 phy = sas_phy->lldd_phy; 1367 break; 1368 } 1369 spin_unlock(&sas_port->phy_list_lock); 1370 1371 if (phy) { 1372 port->id = phy->port_id; 1373 1374 /* Update linkrate of directly attached device. */ 1375 if (!device->parent) 1376 device->linkrate = phy->sas_phy.linkrate; 1377 1378 hisi_hba->hw->setup_itct(hisi_hba, sas_dev); 1379 } else if (!port->port_attached) 1380 port->id = 0xff; 1381 } 1382} 1383 1384static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state) 1385{ 1386 struct asd_sas_port *_sas_port = NULL; 1387 int phy_no; 1388 1389 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) { 1390 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1391 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1392 struct asd_sas_port *sas_port = sas_phy->port; 1393 bool do_port_check = _sas_port != sas_port; 1394 1395 if (!sas_phy->phy->enabled) 1396 continue; 1397 1398 /* Report PHY state change to libsas */ 1399 if (state & BIT(phy_no)) { 1400 if (do_port_check && sas_port && sas_port->port_dev) { 1401 struct domain_device *dev = sas_port->port_dev; 1402 1403 _sas_port = sas_port; 1404 1405 if (dev_is_expander(dev->dev_type)) 1406 sas_notify_port_event(sas_phy, 1407 PORTE_BROADCAST_RCVD, 1408 GFP_KERNEL); 1409 } 1410 } else { 1411 hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL); 1412 } 1413 } 1414} 1415 1416static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba) 1417{ 1418 struct hisi_sas_device *sas_dev; 1419 struct domain_device *device; 1420 int i; 1421 1422 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1423 sas_dev = &hisi_hba->devices[i]; 1424 device = sas_dev->sas_device; 1425 1426 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device) 1427 continue; 1428 1429 hisi_sas_init_device(device); 1430 } 1431} 1432 1433static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba, 1434 struct asd_sas_port *sas_port, 1435 struct domain_device *device) 1436{ 1437 struct ata_port *ap = device->sata_dev.ap; 1438 struct device *dev = hisi_hba->dev; 1439 int rc = TMF_RESP_FUNC_FAILED; 1440 struct ata_link *link; 1441 u8 fis[20] = {0}; 1442 int i; 1443 1444 for (i = 0; i < hisi_hba->n_phy; i++) { 1445 if (!(sas_port->phy_mask & BIT(i))) 1446 continue; 1447 1448 ata_for_each_link(link, ap, EDGE) { 1449 int pmp = sata_srst_pmp(link); 1450 1451 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis); 1452 rc = sas_execute_ata_cmd(device, fis, i); 1453 if (rc != TMF_RESP_FUNC_COMPLETE) { 1454 dev_err(dev, "phy%d ata reset failed rc=%d\n", 1455 i, rc); 1456 break; 1457 } 1458 } 1459 } 1460} 1461 1462static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba) 1463{ 1464 struct device *dev = hisi_hba->dev; 1465 int port_no, rc, i; 1466 1467 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1468 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1469 struct domain_device *device = sas_dev->sas_device; 1470 1471 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device) 1472 continue; 1473 1474 rc = hisi_sas_internal_task_abort_dev(sas_dev, false); 1475 if (rc < 0) 1476 dev_err(dev, "STP reject: abort dev failed %d\n", rc); 1477 } 1478 1479 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) { 1480 struct hisi_sas_port *port = &hisi_hba->port[port_no]; 1481 struct asd_sas_port *sas_port = &port->sas_port; 1482 struct domain_device *port_dev = sas_port->port_dev; 1483 struct domain_device *device; 1484 1485 if (!port_dev || !dev_is_expander(port_dev->dev_type)) 1486 continue; 1487 1488 /* Try to find a SATA device */ 1489 list_for_each_entry(device, &sas_port->dev_list, 1490 dev_list_node) { 1491 if (dev_is_sata(device)) { 1492 hisi_sas_send_ata_reset_each_phy(hisi_hba, 1493 sas_port, 1494 device); 1495 break; 1496 } 1497 } 1498 } 1499} 1500 1501void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba) 1502{ 1503 struct Scsi_Host *shost = hisi_hba->shost; 1504 1505 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba); 1506 1507 scsi_block_requests(shost); 1508 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000); 1509 1510 /* 1511 * hisi_hba->timer is only used for v1/v2 hw, and check hw->sht 1512 * which is also only used for v1/v2 hw to skip it for v3 hw 1513 */ 1514 if (hisi_hba->hw->sht) 1515 del_timer_sync(&hisi_hba->timer); 1516 1517 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); 1518} 1519EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare); 1520 1521static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie) 1522{ 1523 struct hisi_sas_phy *phy = data; 1524 struct hisi_hba *hisi_hba = phy->hisi_hba; 1525 struct device *dev = hisi_hba->dev; 1526 DECLARE_COMPLETION_ONSTACK(completion); 1527 int phy_no = phy->sas_phy.id; 1528 1529 phy->reset_completion = &completion; 1530 hisi_sas_phy_enable(hisi_hba, phy_no, 1); 1531 if (!wait_for_completion_timeout(&completion, 1532 HISI_SAS_WAIT_PHYUP_TIMEOUT)) 1533 dev_warn(dev, "phy%d wait phyup timed out\n", phy_no); 1534 1535 phy->reset_completion = NULL; 1536} 1537 1538void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba) 1539{ 1540 struct Scsi_Host *shost = hisi_hba->shost; 1541 ASYNC_DOMAIN_EXCLUSIVE(async); 1542 int phy_no; 1543 1544 /* Init and wait for PHYs to come up and all libsas event finished. */ 1545 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) { 1546 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1547 1548 if (!(hisi_hba->phy_state & BIT(phy_no))) 1549 continue; 1550 1551 async_schedule_domain(hisi_sas_async_init_wait_phyup, 1552 phy, &async); 1553 } 1554 1555 async_synchronize_full_domain(&async); 1556 hisi_sas_refresh_port_id(hisi_hba); 1557 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); 1558 1559 if (hisi_hba->reject_stp_links_msk) 1560 hisi_sas_terminate_stp_reject(hisi_hba); 1561 hisi_sas_reset_init_all_devices(hisi_hba); 1562 scsi_unblock_requests(shost); 1563 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags); 1564 up(&hisi_hba->sem); 1565 1566 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state); 1567} 1568EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done); 1569 1570static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba) 1571{ 1572 if (!hisi_hba->hw->soft_reset) 1573 return -ENOENT; 1574 1575 down(&hisi_hba->sem); 1576 if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) { 1577 up(&hisi_hba->sem); 1578 return -EPERM; 1579 } 1580 1581 if (hisi_sas_debugfs_enable) 1582 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba); 1583 1584 return 0; 1585} 1586 1587static 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_RESETTING_BIT, &hisi_hba->flags); 1603 return rc; 1604 } 1605 clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags); 1606 1607 hisi_sas_controller_reset_done(hisi_hba); 1608 dev_info(dev, "controller reset complete\n"); 1609 1610 return 0; 1611} 1612 1613static int hisi_sas_abort_task(struct sas_task *task) 1614{ 1615 struct hisi_sas_internal_abort_data internal_abort_data = { false }; 1616 struct domain_device *device = task->dev; 1617 struct hisi_sas_device *sas_dev = device->lldd_dev; 1618 struct hisi_sas_slot *slot = task->lldd_task; 1619 struct hisi_hba *hisi_hba; 1620 struct device *dev; 1621 int rc = TMF_RESP_FUNC_FAILED; 1622 unsigned long flags; 1623 1624 if (!sas_dev) 1625 return TMF_RESP_FUNC_FAILED; 1626 1627 hisi_hba = dev_to_hisi_hba(task->dev); 1628 dev = hisi_hba->dev; 1629 1630 spin_lock_irqsave(&task->task_state_lock, flags); 1631 if (task->task_state_flags & SAS_TASK_STATE_DONE) { 1632 struct hisi_sas_cq *cq; 1633 1634 if (slot) { 1635 /* 1636 * sync irq or poll queue to avoid free'ing task 1637 * before using task in IO completion 1638 */ 1639 cq = &hisi_hba->cq[slot->dlvry_queue]; 1640 hisi_sas_sync_cq(cq); 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 (!slot) 1650 goto out; 1651 1652 if (task->task_proto & SAS_PROTOCOL_SSP) { 1653 u16 tag = slot->idx; 1654 int rc2; 1655 1656 rc = sas_abort_task(task, tag); 1657 rc2 = sas_execute_internal_abort_single(device, tag, 1658 slot->dlvry_queue, &internal_abort_data); 1659 if (rc2 < 0) { 1660 dev_err(dev, "abort task: internal abort (%d)\n", rc2); 1661 return TMF_RESP_FUNC_FAILED; 1662 } 1663 1664 /* 1665 * If the TMF finds that the IO is not in the device and also 1666 * the internal abort does not succeed, then it is safe to 1667 * free the slot. 1668 * Note: if the internal abort succeeds then the slot 1669 * will have already been completed 1670 */ 1671 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) { 1672 if (task->lldd_task) 1673 hisi_sas_do_release_task(hisi_hba, task, slot, true); 1674 } 1675 } else if (task->task_proto & SAS_PROTOCOL_SATA || 1676 task->task_proto & SAS_PROTOCOL_STP) { 1677 if (task->dev->dev_type == SAS_SATA_DEV) { 1678 struct ata_queued_cmd *qc = task->uldd_task; 1679 1680 rc = hisi_sas_internal_task_abort_dev(sas_dev, false); 1681 if (rc < 0) { 1682 dev_err(dev, "abort task: internal abort failed\n"); 1683 goto out; 1684 } 1685 hisi_sas_dereg_device(hisi_hba, device); 1686 1687 /* 1688 * If an ATA internal command times out in ATA EH, it 1689 * need to execute soft reset, so check the scsicmd 1690 */ 1691 if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) && 1692 qc && qc->scsicmd) { 1693 hisi_sas_do_release_task(hisi_hba, task, slot, true); 1694 rc = TMF_RESP_FUNC_COMPLETE; 1695 } else { 1696 rc = hisi_sas_softreset_ata_disk(device); 1697 } 1698 } 1699 } else if (task->task_proto & SAS_PROTOCOL_SMP) { 1700 /* SMP */ 1701 u32 tag = slot->idx; 1702 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue]; 1703 1704 rc = sas_execute_internal_abort_single(device, 1705 tag, slot->dlvry_queue, 1706 &internal_abort_data); 1707 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) && 1708 task->lldd_task) { 1709 /* 1710 * sync irq or poll queue to avoid free'ing task 1711 * before using task in IO completion 1712 */ 1713 hisi_sas_sync_cq(cq); 1714 slot->task = NULL; 1715 } 1716 } 1717 1718out: 1719 if (rc != TMF_RESP_FUNC_COMPLETE) 1720 dev_notice(dev, "abort task: rc=%d\n", rc); 1721 return rc; 1722} 1723 1724static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun) 1725{ 1726 struct hisi_sas_device *sas_dev = device->lldd_dev; 1727 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1728 struct device *dev = hisi_hba->dev; 1729 int rc; 1730 1731 rc = hisi_sas_internal_task_abort_dev(sas_dev, false); 1732 if (rc < 0) { 1733 dev_err(dev, "abort task set: internal abort rc=%d\n", rc); 1734 return TMF_RESP_FUNC_FAILED; 1735 } 1736 hisi_sas_dereg_device(hisi_hba, device); 1737 1738 rc = sas_abort_task_set(device, lun); 1739 if (rc == TMF_RESP_FUNC_COMPLETE) 1740 hisi_sas_release_task(hisi_hba, device); 1741 1742 return rc; 1743} 1744 1745static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device) 1746{ 1747 struct sas_phy *local_phy = sas_get_local_phy(device); 1748 struct hisi_sas_device *sas_dev = device->lldd_dev; 1749 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1750 struct sas_ha_struct *sas_ha = &hisi_hba->sha; 1751 int rc, reset_type; 1752 1753 if (!local_phy->enabled) { 1754 sas_put_local_phy(local_phy); 1755 return -ENODEV; 1756 } 1757 1758 if (scsi_is_sas_phy_local(local_phy)) { 1759 struct asd_sas_phy *sas_phy = 1760 sas_ha->sas_phy[local_phy->number]; 1761 struct hisi_sas_phy *phy = 1762 container_of(sas_phy, struct hisi_sas_phy, sas_phy); 1763 unsigned long flags; 1764 1765 spin_lock_irqsave(&phy->lock, flags); 1766 phy->in_reset = 1; 1767 spin_unlock_irqrestore(&phy->lock, flags); 1768 } 1769 1770 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT || 1771 !dev_is_sata(device)) ? true : false; 1772 1773 rc = sas_phy_reset(local_phy, reset_type); 1774 sas_put_local_phy(local_phy); 1775 1776 if (scsi_is_sas_phy_local(local_phy)) { 1777 struct asd_sas_phy *sas_phy = 1778 sas_ha->sas_phy[local_phy->number]; 1779 struct hisi_sas_phy *phy = 1780 container_of(sas_phy, struct hisi_sas_phy, sas_phy); 1781 unsigned long flags; 1782 1783 spin_lock_irqsave(&phy->lock, flags); 1784 phy->in_reset = 0; 1785 spin_unlock_irqrestore(&phy->lock, flags); 1786 1787 /* report PHY down if timed out */ 1788 if (rc == -ETIMEDOUT) 1789 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL); 1790 return rc; 1791 } 1792 1793 /* Remote phy */ 1794 if (rc) 1795 return rc; 1796 1797 if (dev_is_sata(device)) { 1798 struct ata_link *link = &device->sata_dev.ap->link; 1799 1800 rc = ata_wait_after_reset(link, jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT, 1801 smp_ata_check_ready_type); 1802 } else { 1803 msleep(2000); 1804 } 1805 1806 return rc; 1807} 1808 1809static int hisi_sas_I_T_nexus_reset(struct domain_device *device) 1810{ 1811 struct hisi_sas_device *sas_dev = device->lldd_dev; 1812 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1813 struct device *dev = hisi_hba->dev; 1814 int rc; 1815 1816 if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) 1817 sas_dev->dev_status = HISI_SAS_DEV_NORMAL; 1818 1819 rc = hisi_sas_internal_task_abort_dev(sas_dev, false); 1820 if (rc < 0) { 1821 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc); 1822 return TMF_RESP_FUNC_FAILED; 1823 } 1824 hisi_sas_dereg_device(hisi_hba, device); 1825 1826 rc = hisi_sas_debug_I_T_nexus_reset(device); 1827 if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) { 1828 struct sas_phy *local_phy; 1829 1830 rc = hisi_sas_softreset_ata_disk(device); 1831 switch (rc) { 1832 case -ECOMM: 1833 rc = -ENODEV; 1834 break; 1835 case TMF_RESP_FUNC_FAILED: 1836 case -EMSGSIZE: 1837 case -EIO: 1838 local_phy = sas_get_local_phy(device); 1839 rc = sas_phy_enable(local_phy, 0); 1840 if (!rc) { 1841 local_phy->enabled = 0; 1842 dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n", 1843 SAS_ADDR(device->sas_addr), rc); 1844 rc = -ENODEV; 1845 } 1846 sas_put_local_phy(local_phy); 1847 break; 1848 default: 1849 break; 1850 } 1851 } 1852 1853 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV)) 1854 hisi_sas_release_task(hisi_hba, device); 1855 1856 return rc; 1857} 1858 1859static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun) 1860{ 1861 struct hisi_sas_device *sas_dev = device->lldd_dev; 1862 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1863 struct device *dev = hisi_hba->dev; 1864 int rc = TMF_RESP_FUNC_FAILED; 1865 1866 /* Clear internal IO and then lu reset */ 1867 rc = hisi_sas_internal_task_abort_dev(sas_dev, false); 1868 if (rc < 0) { 1869 dev_err(dev, "lu_reset: internal abort failed\n"); 1870 goto out; 1871 } 1872 hisi_sas_dereg_device(hisi_hba, device); 1873 1874 if (dev_is_sata(device)) { 1875 struct sas_phy *phy; 1876 1877 phy = sas_get_local_phy(device); 1878 1879 rc = sas_phy_reset(phy, true); 1880 1881 if (rc == 0) 1882 hisi_sas_release_task(hisi_hba, device); 1883 sas_put_local_phy(phy); 1884 } else { 1885 rc = sas_lu_reset(device, lun); 1886 if (rc == TMF_RESP_FUNC_COMPLETE) 1887 hisi_sas_release_task(hisi_hba, device); 1888 } 1889out: 1890 if (rc != TMF_RESP_FUNC_COMPLETE) 1891 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n", 1892 sas_dev->device_id, rc); 1893 return rc; 1894} 1895 1896static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie) 1897{ 1898 struct domain_device *device = data; 1899 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1900 int rc; 1901 1902 rc = hisi_sas_debug_I_T_nexus_reset(device); 1903 if (rc != TMF_RESP_FUNC_COMPLETE) 1904 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n", 1905 SAS_ADDR(device->sas_addr), rc); 1906} 1907 1908static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha) 1909{ 1910 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 1911 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r); 1912 ASYNC_DOMAIN_EXCLUSIVE(async); 1913 int i; 1914 1915 queue_work(hisi_hba->wq, &r.work); 1916 wait_for_completion(r.completion); 1917 if (!r.done) 1918 return TMF_RESP_FUNC_FAILED; 1919 1920 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1921 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1922 struct domain_device *device = sas_dev->sas_device; 1923 1924 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device || 1925 dev_is_expander(device->dev_type)) 1926 continue; 1927 1928 async_schedule_domain(hisi_sas_async_I_T_nexus_reset, 1929 device, &async); 1930 } 1931 1932 async_synchronize_full_domain(&async); 1933 hisi_sas_release_tasks(hisi_hba); 1934 1935 return TMF_RESP_FUNC_COMPLETE; 1936} 1937 1938static int hisi_sas_query_task(struct sas_task *task) 1939{ 1940 int rc = TMF_RESP_FUNC_FAILED; 1941 1942 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { 1943 struct hisi_sas_slot *slot = task->lldd_task; 1944 u32 tag = slot->idx; 1945 1946 rc = sas_query_task(task, tag); 1947 switch (rc) { 1948 /* The task is still in Lun, release it then */ 1949 case TMF_RESP_FUNC_SUCC: 1950 /* The task is not in Lun or failed, reset the phy */ 1951 case TMF_RESP_FUNC_FAILED: 1952 case TMF_RESP_FUNC_COMPLETE: 1953 break; 1954 default: 1955 rc = TMF_RESP_FUNC_FAILED; 1956 break; 1957 } 1958 } 1959 return rc; 1960} 1961 1962static bool hisi_sas_internal_abort_timeout(struct sas_task *task, 1963 void *data) 1964{ 1965 struct domain_device *device = task->dev; 1966 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1967 struct hisi_sas_internal_abort_data *timeout = data; 1968 1969 if (hisi_sas_debugfs_enable) { 1970 /* 1971 * If timeout occurs in device gone scenario, to avoid 1972 * circular dependency like: 1973 * hisi_sas_dev_gone() -> down() -> ... -> 1974 * hisi_sas_internal_abort_timeout() -> down(). 1975 */ 1976 if (!timeout->rst_ha_timeout) 1977 down(&hisi_hba->sem); 1978 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba); 1979 if (!timeout->rst_ha_timeout) 1980 up(&hisi_hba->sem); 1981 } 1982 1983 if (task->task_state_flags & SAS_TASK_STATE_DONE) { 1984 pr_err("Internal abort: timeout %016llx\n", 1985 SAS_ADDR(device->sas_addr)); 1986 } else { 1987 struct hisi_sas_slot *slot = task->lldd_task; 1988 1989 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags); 1990 1991 if (slot) { 1992 struct hisi_sas_cq *cq = 1993 &hisi_hba->cq[slot->dlvry_queue]; 1994 /* 1995 * sync irq or poll queue to avoid free'ing task 1996 * before using task in IO completion 1997 */ 1998 hisi_sas_sync_cq(cq); 1999 slot->task = NULL; 2000 } 2001 2002 if (timeout->rst_ha_timeout) { 2003 pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n", 2004 SAS_ADDR(device->sas_addr)); 2005 queue_work(hisi_hba->wq, &hisi_hba->rst_work); 2006 } else { 2007 pr_err("Internal abort: timeout and not done %016llx.\n", 2008 SAS_ADDR(device->sas_addr)); 2009 } 2010 2011 return true; 2012 } 2013 2014 return false; 2015} 2016 2017static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy) 2018{ 2019 hisi_sas_port_notify_formed(sas_phy); 2020} 2021 2022static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type, 2023 u8 reg_index, u8 reg_count, u8 *write_data) 2024{ 2025 struct hisi_hba *hisi_hba = sha->lldd_ha; 2026 2027 if (!hisi_hba->hw->write_gpio) 2028 return -EOPNOTSUPP; 2029 2030 return hisi_hba->hw->write_gpio(hisi_hba, reg_type, 2031 reg_index, reg_count, write_data); 2032} 2033 2034static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy) 2035{ 2036 struct asd_sas_phy *sas_phy = &phy->sas_phy; 2037 struct sas_phy *sphy = sas_phy->phy; 2038 unsigned long flags; 2039 2040 phy->phy_attached = 0; 2041 phy->phy_type = 0; 2042 phy->port = NULL; 2043 2044 spin_lock_irqsave(&phy->lock, flags); 2045 if (phy->enable) 2046 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; 2047 else 2048 sphy->negotiated_linkrate = SAS_PHY_DISABLED; 2049 spin_unlock_irqrestore(&phy->lock, flags); 2050} 2051 2052void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy, 2053 gfp_t gfp_flags) 2054{ 2055 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 2056 struct asd_sas_phy *sas_phy = &phy->sas_phy; 2057 struct device *dev = hisi_hba->dev; 2058 2059 if (rdy) { 2060 /* Phy down but ready */ 2061 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags); 2062 hisi_sas_port_notify_formed(sas_phy); 2063 } else { 2064 struct hisi_sas_port *port = phy->port; 2065 2066 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) || 2067 phy->in_reset) { 2068 dev_info(dev, "ignore flutter phy%d down\n", phy_no); 2069 return; 2070 } 2071 /* Phy down and not ready */ 2072 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags); 2073 sas_phy_disconnected(sas_phy); 2074 2075 if (port) { 2076 if (phy->phy_type & PORT_TYPE_SAS) { 2077 int port_id = port->id; 2078 2079 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba, 2080 port_id)) 2081 port->port_attached = 0; 2082 } else if (phy->phy_type & PORT_TYPE_SATA) 2083 port->port_attached = 0; 2084 } 2085 hisi_sas_phy_disconnected(phy); 2086 } 2087} 2088EXPORT_SYMBOL_GPL(hisi_sas_phy_down); 2089 2090void hisi_sas_phy_bcast(struct hisi_sas_phy *phy) 2091{ 2092 struct asd_sas_phy *sas_phy = &phy->sas_phy; 2093 struct hisi_hba *hisi_hba = phy->hisi_hba; 2094 2095 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) 2096 return; 2097 2098 sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC); 2099} 2100EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast); 2101 2102int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type) 2103{ 2104 struct hisi_hba *hisi_hba = shost_priv(shost); 2105 2106 if (reset_type != SCSI_ADAPTER_RESET) 2107 return -EOPNOTSUPP; 2108 2109 queue_work(hisi_hba->wq, &hisi_hba->rst_work); 2110 2111 return 0; 2112} 2113EXPORT_SYMBOL_GPL(hisi_sas_host_reset); 2114 2115struct scsi_transport_template *hisi_sas_stt; 2116EXPORT_SYMBOL_GPL(hisi_sas_stt); 2117 2118static struct sas_domain_function_template hisi_sas_transport_ops = { 2119 .lldd_dev_found = hisi_sas_dev_found, 2120 .lldd_dev_gone = hisi_sas_dev_gone, 2121 .lldd_execute_task = hisi_sas_queue_command, 2122 .lldd_control_phy = hisi_sas_control_phy, 2123 .lldd_abort_task = hisi_sas_abort_task, 2124 .lldd_abort_task_set = hisi_sas_abort_task_set, 2125 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset, 2126 .lldd_lu_reset = hisi_sas_lu_reset, 2127 .lldd_query_task = hisi_sas_query_task, 2128 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha, 2129 .lldd_port_formed = hisi_sas_port_formed, 2130 .lldd_write_gpio = hisi_sas_write_gpio, 2131 .lldd_tmf_aborted = hisi_sas_tmf_aborted, 2132 .lldd_abort_timeout = hisi_sas_internal_abort_timeout, 2133}; 2134 2135void hisi_sas_init_mem(struct hisi_hba *hisi_hba) 2136{ 2137 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS; 2138 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint; 2139 2140 for (i = 0; i < hisi_hba->queue_count; i++) { 2141 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2142 struct hisi_sas_dq *dq = &hisi_hba->dq[i]; 2143 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i]; 2144 2145 s = sizeof(struct hisi_sas_cmd_hdr); 2146 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++) 2147 memset(&cmd_hdr[j], 0, s); 2148 2149 dq->wr_point = 0; 2150 2151 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 2152 memset(hisi_hba->complete_hdr[i], 0, s); 2153 cq->rd_point = 0; 2154 } 2155 2156 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy; 2157 memset(hisi_hba->initial_fis, 0, s); 2158 2159 s = max_command_entries * sizeof(struct hisi_sas_iost); 2160 memset(hisi_hba->iost, 0, s); 2161 2162 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 2163 memset(hisi_hba->breakpoint, 0, s); 2164 2165 s = sizeof(struct hisi_sas_sata_breakpoint); 2166 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++) 2167 memset(&sata_breakpoint[j], 0, s); 2168} 2169EXPORT_SYMBOL_GPL(hisi_sas_init_mem); 2170 2171int hisi_sas_alloc(struct hisi_hba *hisi_hba) 2172{ 2173 struct device *dev = hisi_hba->dev; 2174 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS; 2175 int max_command_entries_ru, sz_slot_buf_ru; 2176 int blk_cnt, slots_per_blk; 2177 2178 sema_init(&hisi_hba->sem, 1); 2179 spin_lock_init(&hisi_hba->lock); 2180 for (i = 0; i < hisi_hba->n_phy; i++) { 2181 hisi_sas_phy_init(hisi_hba, i); 2182 hisi_hba->port[i].port_attached = 0; 2183 hisi_hba->port[i].id = -1; 2184 } 2185 2186 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 2187 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED; 2188 hisi_hba->devices[i].device_id = i; 2189 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT; 2190 } 2191 2192 for (i = 0; i < hisi_hba->queue_count; i++) { 2193 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2194 struct hisi_sas_dq *dq = &hisi_hba->dq[i]; 2195 2196 /* Completion queue structure */ 2197 cq->id = i; 2198 cq->hisi_hba = hisi_hba; 2199 spin_lock_init(&cq->poll_lock); 2200 2201 /* Delivery queue structure */ 2202 spin_lock_init(&dq->lock); 2203 INIT_LIST_HEAD(&dq->list); 2204 dq->id = i; 2205 dq->hisi_hba = hisi_hba; 2206 2207 /* Delivery queue */ 2208 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; 2209 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s, 2210 &hisi_hba->cmd_hdr_dma[i], 2211 GFP_KERNEL); 2212 if (!hisi_hba->cmd_hdr[i]) 2213 goto err_out; 2214 2215 /* Completion queue */ 2216 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 2217 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s, 2218 &hisi_hba->complete_hdr_dma[i], 2219 GFP_KERNEL); 2220 if (!hisi_hba->complete_hdr[i]) 2221 goto err_out; 2222 } 2223 2224 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct); 2225 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma, 2226 GFP_KERNEL); 2227 if (!hisi_hba->itct) 2228 goto err_out; 2229 2230 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries, 2231 sizeof(struct hisi_sas_slot), 2232 GFP_KERNEL); 2233 if (!hisi_hba->slot_info) 2234 goto err_out; 2235 2236 /* roundup to avoid overly large block size */ 2237 max_command_entries_ru = roundup(max_command_entries, 64); 2238 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK) 2239 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table); 2240 else 2241 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table); 2242 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64); 2243 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE); 2244 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s; 2245 slots_per_blk = s / sz_slot_buf_ru; 2246 2247 for (i = 0; i < blk_cnt; i++) { 2248 int slot_index = i * slots_per_blk; 2249 dma_addr_t buf_dma; 2250 void *buf; 2251 2252 buf = dmam_alloc_coherent(dev, s, &buf_dma, 2253 GFP_KERNEL); 2254 if (!buf) 2255 goto err_out; 2256 2257 for (j = 0; j < slots_per_blk; j++, slot_index++) { 2258 struct hisi_sas_slot *slot; 2259 2260 slot = &hisi_hba->slot_info[slot_index]; 2261 slot->buf = buf; 2262 slot->buf_dma = buf_dma; 2263 slot->idx = slot_index; 2264 2265 buf += sz_slot_buf_ru; 2266 buf_dma += sz_slot_buf_ru; 2267 } 2268 } 2269 2270 s = max_command_entries * sizeof(struct hisi_sas_iost); 2271 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma, 2272 GFP_KERNEL); 2273 if (!hisi_hba->iost) 2274 goto err_out; 2275 2276 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 2277 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s, 2278 &hisi_hba->breakpoint_dma, 2279 GFP_KERNEL); 2280 if (!hisi_hba->breakpoint) 2281 goto err_out; 2282 2283 s = hisi_hba->slot_index_count = max_command_entries; 2284 hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL); 2285 if (!hisi_hba->slot_index_tags) 2286 goto err_out; 2287 2288 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS; 2289 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s, 2290 &hisi_hba->initial_fis_dma, 2291 GFP_KERNEL); 2292 if (!hisi_hba->initial_fis) 2293 goto err_out; 2294 2295 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint); 2296 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s, 2297 &hisi_hba->sata_breakpoint_dma, 2298 GFP_KERNEL); 2299 if (!hisi_hba->sata_breakpoint) 2300 goto err_out; 2301 2302 hisi_hba->last_slot_index = 0; 2303 2304 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev)); 2305 if (!hisi_hba->wq) { 2306 dev_err(dev, "sas_alloc: failed to create workqueue\n"); 2307 goto err_out; 2308 } 2309 2310 return 0; 2311err_out: 2312 return -ENOMEM; 2313} 2314EXPORT_SYMBOL_GPL(hisi_sas_alloc); 2315 2316void hisi_sas_free(struct hisi_hba *hisi_hba) 2317{ 2318 int i; 2319 2320 for (i = 0; i < hisi_hba->n_phy; i++) { 2321 struct hisi_sas_phy *phy = &hisi_hba->phy[i]; 2322 2323 del_timer_sync(&phy->timer); 2324 } 2325 2326 if (hisi_hba->wq) 2327 destroy_workqueue(hisi_hba->wq); 2328} 2329EXPORT_SYMBOL_GPL(hisi_sas_free); 2330 2331void hisi_sas_rst_work_handler(struct work_struct *work) 2332{ 2333 struct hisi_hba *hisi_hba = 2334 container_of(work, struct hisi_hba, rst_work); 2335 2336 if (hisi_sas_controller_prereset(hisi_hba)) 2337 return; 2338 2339 hisi_sas_controller_reset(hisi_hba); 2340} 2341EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler); 2342 2343void hisi_sas_sync_rst_work_handler(struct work_struct *work) 2344{ 2345 struct hisi_sas_rst *rst = 2346 container_of(work, struct hisi_sas_rst, work); 2347 2348 if (hisi_sas_controller_prereset(rst->hisi_hba)) 2349 goto rst_complete; 2350 2351 if (!hisi_sas_controller_reset(rst->hisi_hba)) 2352 rst->done = true; 2353rst_complete: 2354 complete(rst->completion); 2355} 2356EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler); 2357 2358int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba) 2359{ 2360 struct device *dev = hisi_hba->dev; 2361 struct platform_device *pdev = hisi_hba->platform_dev; 2362 struct device_node *np = pdev ? pdev->dev.of_node : NULL; 2363 struct clk *refclk; 2364 2365 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr, 2366 SAS_ADDR_SIZE)) { 2367 dev_err(dev, "could not get property sas-addr\n"); 2368 return -ENOENT; 2369 } 2370 2371 if (np) { 2372 /* 2373 * These properties are only required for platform device-based 2374 * controller with DT firmware. 2375 */ 2376 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np, 2377 "hisilicon,sas-syscon"); 2378 if (IS_ERR(hisi_hba->ctrl)) { 2379 dev_err(dev, "could not get syscon\n"); 2380 return -ENOENT; 2381 } 2382 2383 if (device_property_read_u32(dev, "ctrl-reset-reg", 2384 &hisi_hba->ctrl_reset_reg)) { 2385 dev_err(dev, "could not get property ctrl-reset-reg\n"); 2386 return -ENOENT; 2387 } 2388 2389 if (device_property_read_u32(dev, "ctrl-reset-sts-reg", 2390 &hisi_hba->ctrl_reset_sts_reg)) { 2391 dev_err(dev, "could not get property ctrl-reset-sts-reg\n"); 2392 return -ENOENT; 2393 } 2394 2395 if (device_property_read_u32(dev, "ctrl-clock-ena-reg", 2396 &hisi_hba->ctrl_clock_ena_reg)) { 2397 dev_err(dev, "could not get property ctrl-clock-ena-reg\n"); 2398 return -ENOENT; 2399 } 2400 } 2401 2402 refclk = devm_clk_get(dev, NULL); 2403 if (IS_ERR(refclk)) 2404 dev_dbg(dev, "no ref clk property\n"); 2405 else 2406 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000; 2407 2408 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) { 2409 dev_err(dev, "could not get property phy-count\n"); 2410 return -ENOENT; 2411 } 2412 2413 if (device_property_read_u32(dev, "queue-count", 2414 &hisi_hba->queue_count)) { 2415 dev_err(dev, "could not get property queue-count\n"); 2416 return -ENOENT; 2417 } 2418 2419 return 0; 2420} 2421EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info); 2422 2423static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev, 2424 const struct hisi_sas_hw *hw) 2425{ 2426 struct resource *res; 2427 struct Scsi_Host *shost; 2428 struct hisi_hba *hisi_hba; 2429 struct device *dev = &pdev->dev; 2430 int error; 2431 2432 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba)); 2433 if (!shost) { 2434 dev_err(dev, "scsi host alloc failed\n"); 2435 return NULL; 2436 } 2437 hisi_hba = shost_priv(shost); 2438 2439 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler); 2440 hisi_hba->hw = hw; 2441 hisi_hba->dev = dev; 2442 hisi_hba->platform_dev = pdev; 2443 hisi_hba->shost = shost; 2444 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha; 2445 2446 timer_setup(&hisi_hba->timer, NULL, 0); 2447 2448 if (hisi_sas_get_fw_info(hisi_hba) < 0) 2449 goto err_out; 2450 2451 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); 2452 if (error) { 2453 dev_err(dev, "No usable DMA addressing method\n"); 2454 goto err_out; 2455 } 2456 2457 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0); 2458 if (IS_ERR(hisi_hba->regs)) 2459 goto err_out; 2460 2461 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 2462 if (res) { 2463 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res); 2464 if (IS_ERR(hisi_hba->sgpio_regs)) 2465 goto err_out; 2466 } 2467 2468 if (hisi_sas_alloc(hisi_hba)) { 2469 hisi_sas_free(hisi_hba); 2470 goto err_out; 2471 } 2472 2473 return shost; 2474err_out: 2475 scsi_host_put(shost); 2476 dev_err(dev, "shost alloc failed\n"); 2477 return NULL; 2478} 2479 2480static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba) 2481{ 2482 if (hisi_hba->hw->interrupt_preinit) 2483 return hisi_hba->hw->interrupt_preinit(hisi_hba); 2484 return 0; 2485} 2486 2487int hisi_sas_probe(struct platform_device *pdev, 2488 const struct hisi_sas_hw *hw) 2489{ 2490 struct Scsi_Host *shost; 2491 struct hisi_hba *hisi_hba; 2492 struct device *dev = &pdev->dev; 2493 struct asd_sas_phy **arr_phy; 2494 struct asd_sas_port **arr_port; 2495 struct sas_ha_struct *sha; 2496 int rc, phy_nr, port_nr, i; 2497 2498 shost = hisi_sas_shost_alloc(pdev, hw); 2499 if (!shost) 2500 return -ENOMEM; 2501 2502 sha = SHOST_TO_SAS_HA(shost); 2503 hisi_hba = shost_priv(shost); 2504 platform_set_drvdata(pdev, sha); 2505 2506 phy_nr = port_nr = hisi_hba->n_phy; 2507 2508 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL); 2509 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL); 2510 if (!arr_phy || !arr_port) { 2511 rc = -ENOMEM; 2512 goto err_out_ha; 2513 } 2514 2515 sha->sas_phy = arr_phy; 2516 sha->sas_port = arr_port; 2517 sha->lldd_ha = hisi_hba; 2518 2519 shost->transportt = hisi_sas_stt; 2520 shost->max_id = HISI_SAS_MAX_DEVICES; 2521 shost->max_lun = ~0; 2522 shost->max_channel = 1; 2523 shost->max_cmd_len = 16; 2524 if (hisi_hba->hw->slot_index_alloc) { 2525 shost->can_queue = HISI_SAS_MAX_COMMANDS; 2526 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS; 2527 } else { 2528 shost->can_queue = HISI_SAS_UNRESERVED_IPTT; 2529 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT; 2530 } 2531 2532 sha->sas_ha_name = DRV_NAME; 2533 sha->dev = hisi_hba->dev; 2534 sha->sas_addr = &hisi_hba->sas_addr[0]; 2535 sha->num_phys = hisi_hba->n_phy; 2536 sha->shost = hisi_hba->shost; 2537 2538 for (i = 0; i < hisi_hba->n_phy; i++) { 2539 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy; 2540 sha->sas_port[i] = &hisi_hba->port[i].sas_port; 2541 } 2542 2543 rc = hisi_sas_interrupt_preinit(hisi_hba); 2544 if (rc) 2545 goto err_out_ha; 2546 2547 rc = scsi_add_host(shost, &pdev->dev); 2548 if (rc) 2549 goto err_out_ha; 2550 2551 rc = sas_register_ha(sha); 2552 if (rc) 2553 goto err_out_register_ha; 2554 2555 rc = hisi_hba->hw->hw_init(hisi_hba); 2556 if (rc) 2557 goto err_out_hw_init; 2558 2559 scsi_scan_host(shost); 2560 2561 return 0; 2562 2563err_out_hw_init: 2564 sas_unregister_ha(sha); 2565err_out_register_ha: 2566 scsi_remove_host(shost); 2567err_out_ha: 2568 hisi_sas_free(hisi_hba); 2569 scsi_host_put(shost); 2570 return rc; 2571} 2572EXPORT_SYMBOL_GPL(hisi_sas_probe); 2573 2574void hisi_sas_remove(struct platform_device *pdev) 2575{ 2576 struct sas_ha_struct *sha = platform_get_drvdata(pdev); 2577 struct hisi_hba *hisi_hba = sha->lldd_ha; 2578 struct Scsi_Host *shost = sha->shost; 2579 2580 del_timer_sync(&hisi_hba->timer); 2581 2582 sas_unregister_ha(sha); 2583 sas_remove_host(shost); 2584 2585 hisi_sas_free(hisi_hba); 2586 scsi_host_put(shost); 2587} 2588EXPORT_SYMBOL_GPL(hisi_sas_remove); 2589 2590#if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE) 2591#define DEBUGFS_ENABLE_DEFAULT "enabled" 2592bool hisi_sas_debugfs_enable = true; 2593u32 hisi_sas_debugfs_dump_count = 50; 2594#else 2595#define DEBUGFS_ENABLE_DEFAULT "disabled" 2596bool hisi_sas_debugfs_enable; 2597u32 hisi_sas_debugfs_dump_count = 1; 2598#endif 2599 2600EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable); 2601module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444); 2602MODULE_PARM_DESC(hisi_sas_debugfs_enable, 2603 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")"); 2604 2605EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count); 2606module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444); 2607MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow"); 2608 2609struct dentry *hisi_sas_debugfs_dir; 2610EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir); 2611 2612static __init int hisi_sas_init(void) 2613{ 2614 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops); 2615 if (!hisi_sas_stt) 2616 return -ENOMEM; 2617 2618 if (hisi_sas_debugfs_enable) { 2619 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL); 2620 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) { 2621 pr_info("hisi_sas: Limiting debugfs dump count\n"); 2622 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP; 2623 } 2624 } 2625 2626 return 0; 2627} 2628 2629static __exit void hisi_sas_exit(void) 2630{ 2631 sas_release_transport(hisi_sas_stt); 2632 2633 if (hisi_sas_debugfs_enable) 2634 debugfs_remove(hisi_sas_debugfs_dir); 2635} 2636 2637module_init(hisi_sas_init); 2638module_exit(hisi_sas_exit); 2639 2640MODULE_LICENSE("GPL"); 2641MODULE_AUTHOR("John Garry <john.garry@huawei.com>"); 2642MODULE_DESCRIPTION("HISILICON SAS controller driver"); 2643MODULE_ALIAS("platform:" DRV_NAME); 2644