1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) 2015 Linaro Ltd.
4 * Copyright (c) 2015 Hisilicon Limited.
8 #define DRV_NAME "hisi_sas"
10 #define DEV_IS_GONE(dev) \
11 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
13 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
14 u8 *lun, struct hisi_sas_tmf_task *tmf);
16 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
17 struct domain_device *device,
18 int abort_flag, int tag, bool rst_to_recover);
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,
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);
26 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
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;
36 case ATA_CMD_DOWNLOAD_MICRO:
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;
49 case ATA_CMD_DOWNLOAD_MICRO_DMA:
50 case ATA_CMD_PMP_READ_DMA:
51 case ATA_CMD_PMP_WRITE_DMA:
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:
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;
67 case ATA_CMD_CHK_POWER:
68 case ATA_CMD_DEV_RESET:
71 case ATA_CMD_FLUSH_EXT:
73 case ATA_CMD_VERIFY_EXT:
74 case ATA_CMD_SET_FEATURES:
76 case ATA_CMD_STANDBYNOW1:
77 case ATA_CMD_ZAC_MGMT_OUT:
78 return HISI_SAS_SATA_PROTOCOL_NONDATA;
81 switch (fis->features) {
82 case ATA_SET_MAX_PASSWD:
83 case ATA_SET_MAX_LOCK:
84 return HISI_SAS_SATA_PROTOCOL_PIO;
86 case ATA_SET_MAX_PASSWD_DMA:
87 case ATA_SET_MAX_UNLOCK_DMA:
88 return HISI_SAS_SATA_PROTOCOL_DMA;
91 return HISI_SAS_SATA_PROTOCOL_NONDATA;
96 if (direction == DMA_NONE)
97 return HISI_SAS_SATA_PROTOCOL_NONDATA;
98 return HISI_SAS_SATA_PROTOCOL_PIO;
102 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
104 void hisi_sas_sata_done(struct sas_task *task,
105 struct hisi_sas_slot *slot)
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;
114 resp->frame_len = sizeof(struct dev_to_host_fis);
115 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
117 ts->buf_valid_size = sizeof(*resp);
119 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
122 * This function assumes linkrate mask fits in 8 bits, which it
123 * does for all HW versions supported.
125 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
130 max -= SAS_LINK_RATE_1_5_GBPS;
131 for (i = 0; i <= max; i++)
132 rate |= 1 << (i * 2);
135 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
137 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
139 return device->port->ha->lldd_ha;
142 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
144 return container_of(sas_port, struct hisi_sas_port, sas_port);
146 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
148 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
152 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
153 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
155 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
157 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
159 void *bitmap = hisi_hba->slot_index_tags;
161 clear_bit(slot_idx, bitmap);
164 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
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);
174 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
176 void *bitmap = hisi_hba->slot_index_tags;
178 set_bit(slot_idx, bitmap);
181 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
182 struct scsi_cmnd *scsi_cmnd)
185 void *bitmap = hisi_hba->slot_index_tags;
188 return scsi_cmd_to_rq(scsi_cmnd)->tag;
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;
202 hisi_sas_slot_index_set(hisi_hba, index);
203 hisi_hba->last_slot_index = index;
204 spin_unlock(&hisi_hba->lock);
209 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
213 for (i = 0; i < hisi_hba->slot_index_count; ++i)
214 hisi_sas_slot_index_clear(hisi_hba, i);
217 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
218 struct hisi_sas_slot *slot)
220 int device_id = slot->device_id;
221 struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
224 struct device *dev = hisi_hba->dev;
226 if (!task->lldd_task)
229 task->lldd_task = NULL;
231 if (!sas_protocol_ata(task->task_proto)) {
233 dma_unmap_sg(dev, task->scatter,
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;
240 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
241 scsi_prot_sg_count(scsi_cmnd),
247 spin_lock(&sas_dev->lock);
248 list_del_init(&slot->entry);
249 spin_unlock(&sas_dev->lock);
251 memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
253 hisi_sas_slot_index_free(hisi_hba, slot->idx);
255 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
257 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
258 struct hisi_sas_slot *slot)
260 hisi_hba->hw->prep_smp(hisi_hba, slot);
263 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
264 struct hisi_sas_slot *slot)
266 hisi_hba->hw->prep_ssp(hisi_hba, slot);
269 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
270 struct hisi_sas_slot *slot)
272 hisi_hba->hw->prep_stp(hisi_hba, slot);
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)
279 hisi_hba->hw->prep_abort(hisi_hba, slot,
280 device_id, abort_flag, tag_to_abort);
283 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
284 struct sas_task *task, int n_elem,
287 struct device *dev = hisi_hba->dev;
289 if (!sas_protocol_ata(task->task_proto)) {
290 if (task->num_scatter) {
292 dma_unmap_sg(dev, task->scatter,
295 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
297 dma_unmap_sg(dev, &task->smp_task.smp_req,
303 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
304 struct sas_task *task, int *n_elem,
307 struct device *dev = hisi_hba->dev;
310 if (sas_protocol_ata(task->task_proto)) {
311 *n_elem = task->num_scatter;
313 unsigned int req_len;
315 if (task->num_scatter) {
316 *n_elem = dma_map_sg(dev, task->scatter,
317 task->num_scatter, task->data_dir);
322 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
323 *n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
329 req_len = sg_dma_len(&task->smp_task.smp_req);
332 goto err_out_dma_unmap;
337 if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
338 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
341 goto 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,
353 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
354 struct sas_task *task, int n_elem_dif)
356 struct device *dev = hisi_hba->dev;
359 struct sas_ssp_task *ssp_task = &task->ssp_task;
360 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
362 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
363 scsi_prot_sg_count(scsi_cmnd),
368 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
369 int *n_elem_dif, struct sas_task *task)
371 struct device *dev = hisi_hba->dev;
372 struct sas_ssp_task *ssp_task;
373 struct scsi_cmnd *scsi_cmnd;
376 if (task->num_scatter) {
377 ssp_task = &task->ssp_task;
378 scsi_cmnd = ssp_task->cmd;
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),
389 if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
390 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
393 goto err_out_dif_dma_unmap;
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);
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,
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;
426 if (DEV_IS_GONE(sas_dev)) {
428 dev_info(dev, "task prep: device %d not ready\n",
431 dev_info(dev, "task prep: device %016llx not ready\n",
432 SAS_ADDR(device->sas_addr));
437 if (task->uldd_task) {
438 struct ata_queued_cmd *qc;
440 if (dev_is_sata(device)) {
441 qc = task->uldd_task;
444 scmd = task->uldd_task;
449 unsigned int dq_index;
452 blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
453 dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
454 *dq_pointer = dq = &hisi_hba->dq[dq_index];
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()];
460 *dq_pointer = dq = &hisi_hba->dq[queue];
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)) ?
473 rc = hisi_sas_dma_map(hisi_hba, task, &n_elem,
478 if (!sas_protocol_ata(task->task_proto)) {
479 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
481 goto err_out_dma_unmap;
484 if (hisi_hba->hw->slot_index_alloc)
485 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
487 rc = hisi_sas_slot_index_alloc(hisi_hba, scmd);
490 goto err_out_dif_dma_unmap;
493 slot = &hisi_hba->slot_info[slot_idx];
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);
504 dlvry_queue = dq->id;
505 dlvry_queue_slot = wr_q_index;
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];
517 slot->is_internal = is_tmf;
518 task->lldd_task = slot;
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));
525 switch (task->task_proto) {
526 case SAS_PROTOCOL_SMP:
527 hisi_sas_task_prep_smp(hisi_hba, slot);
529 case SAS_PROTOCOL_SSP:
530 hisi_sas_task_prep_ssp(hisi_hba, slot);
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);
538 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
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);
548 WRITE_ONCE(slot->ready, 1);
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);
556 hisi_sas_dma_unmap(hisi_hba, task, n_elem,
559 dev_err(dev, "task prep: failed[%d]!\n", rc);
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)
568 struct hisi_hba *hisi_hba;
570 struct domain_device *device = task->dev;
571 struct asd_sas_port *sas_port = device->port;
572 struct hisi_sas_dq *dq = NULL;
575 struct task_status_struct *ts = &task->task_status;
577 ts->resp = SAS_TASK_UNDELIVERED;
578 ts->stat = SAS_PHY_DOWN;
580 * libsas will use dev->port, should
581 * not call task_done for sata
583 if (device->dev_type != SAS_SATA_DEV)
584 task->task_done(task);
588 hisi_hba = dev_to_hisi_hba(device);
591 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
592 if (!gfpflags_allow_blocking(gfp_flags))
595 down(&hisi_hba->sem);
599 /* protect task_prep and start_delivery sequence */
600 rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf, &pass);
602 dev_err(dev, "task exec: failed[%d]!\n", rc);
605 spin_lock(&dq->lock);
606 hisi_hba->hw->start_delivery(dq);
607 spin_unlock(&dq->lock);
613 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no,
616 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
617 struct asd_sas_phy *sas_phy = &phy->sas_phy;
619 if (!phy->phy_attached)
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);
628 sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
631 struct sas_phy *sphy = sas_phy->phy;
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;
640 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
641 sphy->maximum_linkrate = phy->maximum_linkrate;
644 if (phy->phy_type & PORT_TYPE_SAS) {
645 struct sas_identify_frame *id;
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) {
655 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
656 sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
659 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
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;
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];
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;
680 spin_lock_init(&sas_dev->lock);
681 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
686 hisi_hba->last_dev_id = i;
687 spin_unlock(&hisi_hba->lock);
692 #define HISI_SAS_DISK_RECOVER_CNT 3
693 static int hisi_sas_init_device(struct domain_device *device)
695 int rc = TMF_RESP_FUNC_COMPLETE;
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;
703 switch (device->dev_type) {
705 int_to_scsilun(0, &lun);
707 tmf_task.tmf = TMF_CLEAR_TASK_SET;
708 while (retry-- > 0) {
709 rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
711 if (rc == TMF_RESP_FUNC_COMPLETE) {
712 hisi_sas_release_task(hisi_hba, device);
719 case SAS_SATA_PM_PORT:
720 case SAS_SATA_PENDING:
722 * send HARD RESET to clear previous affiliation of
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;
736 ata_for_each_link(link, ap, EDGE)
737 rc = ops->hardreset(link, &classes,
740 sas_put_local_phy(local_phy);
742 dev_warn(dev, "SATA disk hardreset fail: %d\n", rc);
746 while (retry-- > 0) {
747 rc = hisi_sas_softreset_ata_disk(device);
759 static int hisi_sas_dev_found(struct domain_device *device)
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;
767 if (hisi_hba->hw->alloc_dev)
768 sas_dev = hisi_hba->hw->alloc_dev(device);
770 sas_dev = hisi_sas_alloc_dev(device);
772 dev_err(dev, "fail alloc dev: max support %d devices\n",
773 HISI_SAS_MAX_DEVICES);
777 device->lldd_dev = sas_dev;
778 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
780 if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
782 u8 phy_num = parent_dev->ex_dev.num_phys;
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))
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));
802 dev_info(dev, "dev[%d:%x] found\n",
803 sas_dev->device_id, sas_dev->dev_type);
805 rc = hisi_sas_init_device(device);
808 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
812 hisi_sas_dev_gone(device);
816 int hisi_sas_slave_configure(struct scsi_device *sdev)
818 struct domain_device *dev = sdev_to_domain_dev(sdev);
819 int ret = sas_slave_configure(sdev);
823 if (!dev_is_sata(dev))
824 sas_change_queue_depth(sdev, 64);
828 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
830 void hisi_sas_scan_start(struct Scsi_Host *shost)
832 struct hisi_hba *hisi_hba = shost_priv(shost);
834 hisi_hba->hw->phys_init(hisi_hba);
836 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
838 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
840 struct hisi_hba *hisi_hba = shost_priv(shost);
841 struct sas_ha_struct *sha = &hisi_hba->sha;
843 /* Wait for PHY up interrupt to occur */
850 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
852 static void hisi_sas_phyup_work(struct work_struct *work)
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;
860 phy->wait_phyup_cnt = 0;
861 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
862 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
863 hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
866 static void hisi_sas_linkreset_work(struct work_struct *work)
868 struct hisi_sas_phy *phy =
869 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
870 struct asd_sas_phy *sas_phy = &phy->sas_phy;
872 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
875 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
876 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
877 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
880 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
881 enum hisi_sas_phy_event event)
883 struct hisi_hba *hisi_hba = phy->hisi_hba;
885 if (WARN_ON(event >= HISI_PHYES_NUM))
888 return queue_work(hisi_hba->wq, &phy->works[event]);
890 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
892 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
894 struct hisi_sas_phy *phy = from_timer(phy, t, timer);
895 struct hisi_hba *hisi_hba = phy->hisi_hba;
896 struct device *dev = hisi_hba->dev;
897 int phy_no = phy->sas_phy.id;
899 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
900 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
903 #define HISI_SAS_WAIT_PHYUP_RETRIES 10
905 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
907 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
908 struct device *dev = hisi_hba->dev;
910 dev_dbg(dev, "phy%d OOB ready\n", phy_no);
911 if (phy->phy_attached)
914 if (!timer_pending(&phy->timer)) {
915 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
916 phy->wait_phyup_cnt++;
917 phy->timer.expires = jiffies +
918 HISI_SAS_WAIT_PHYUP_TIMEOUT;
919 add_timer(&phy->timer);
921 dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
922 phy_no, phy->wait_phyup_cnt);
923 phy->wait_phyup_cnt = 0;
927 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
929 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
931 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
932 struct asd_sas_phy *sas_phy = &phy->sas_phy;
935 phy->hisi_hba = hisi_hba;
937 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
938 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
939 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
940 sas_phy->class = SAS;
941 sas_phy->iproto = SAS_PROTOCOL_ALL;
943 sas_phy->type = PHY_TYPE_PHYSICAL;
944 sas_phy->role = PHY_ROLE_INITIATOR;
945 sas_phy->oob_mode = OOB_NOT_CONNECTED;
946 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
947 sas_phy->id = phy_no;
948 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
949 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
950 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
951 sas_phy->lldd_phy = phy;
953 for (i = 0; i < HISI_PHYES_NUM; i++)
954 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
956 spin_lock_init(&phy->lock);
958 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
961 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
962 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
964 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
965 struct asd_sas_phy *aphy = &phy->sas_phy;
966 struct sas_phy *sphy = aphy->phy;
969 spin_lock_irqsave(&phy->lock, flags);
972 /* We may have been enabled already; if so, don't touch */
974 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
975 hisi_hba->hw->phy_start(hisi_hba, phy_no);
977 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
978 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
980 phy->enable = enable;
981 spin_unlock_irqrestore(&phy->lock, flags);
983 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
985 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
987 struct sas_ha_struct *sas_ha = sas_phy->ha;
988 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
989 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
990 struct asd_sas_port *sas_port = sas_phy->port;
991 struct hisi_sas_port *port;
997 port = to_hisi_sas_port(sas_port);
998 spin_lock_irqsave(&hisi_hba->lock, flags);
999 port->port_attached = 1;
1000 port->id = phy->port_id;
1002 sas_port->lldd_port = port;
1003 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1006 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1007 struct hisi_sas_slot *slot)
1010 unsigned long flags;
1011 struct task_status_struct *ts;
1013 ts = &task->task_status;
1015 ts->resp = SAS_TASK_COMPLETE;
1016 ts->stat = SAS_ABORTED_TASK;
1017 spin_lock_irqsave(&task->task_state_lock, flags);
1018 task->task_state_flags &=
1019 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1020 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1021 task->task_state_flags |= SAS_TASK_STATE_DONE;
1022 spin_unlock_irqrestore(&task->task_state_lock, flags);
1025 hisi_sas_slot_task_free(hisi_hba, task, slot);
1028 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1029 struct domain_device *device)
1031 struct hisi_sas_slot *slot, *slot2;
1032 struct hisi_sas_device *sas_dev = device->lldd_dev;
1034 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1035 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
1038 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1040 struct hisi_sas_device *sas_dev;
1041 struct domain_device *device;
1044 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1045 sas_dev = &hisi_hba->devices[i];
1046 device = sas_dev->sas_device;
1048 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1052 hisi_sas_release_task(hisi_hba, device);
1055 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1057 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1058 struct domain_device *device)
1060 if (hisi_hba->hw->dereg_device)
1061 hisi_hba->hw->dereg_device(hisi_hba, device);
1064 static void hisi_sas_dev_gone(struct domain_device *device)
1066 struct hisi_sas_device *sas_dev = device->lldd_dev;
1067 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1068 struct device *dev = hisi_hba->dev;
1071 dev_info(dev, "dev[%d:%x] is gone\n",
1072 sas_dev->device_id, sas_dev->dev_type);
1074 down(&hisi_hba->sem);
1075 if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
1076 hisi_sas_internal_task_abort(hisi_hba, device,
1077 HISI_SAS_INT_ABT_DEV, 0, true);
1079 hisi_sas_dereg_device(hisi_hba, device);
1081 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1082 device->lldd_dev = NULL;
1085 if (hisi_hba->hw->free_device)
1086 hisi_hba->hw->free_device(sas_dev);
1088 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1090 sas_dev->dev_type = SAS_PHY_UNUSED;
1091 sas_dev->sas_device = NULL;
1095 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
1097 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
1100 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1101 struct sas_phy_linkrates *r)
1103 struct sas_phy_linkrates _r;
1105 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1106 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1107 enum sas_linkrate min, max;
1109 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1112 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1113 max = sas_phy->phy->maximum_linkrate;
1114 min = r->minimum_linkrate;
1115 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1116 max = r->maximum_linkrate;
1117 min = sas_phy->phy->minimum_linkrate;
1121 _r.maximum_linkrate = max;
1122 _r.minimum_linkrate = min;
1124 sas_phy->phy->maximum_linkrate = max;
1125 sas_phy->phy->minimum_linkrate = min;
1127 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1129 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1130 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1135 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1138 struct sas_ha_struct *sas_ha = sas_phy->ha;
1139 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1140 int phy_no = sas_phy->id;
1143 case PHY_FUNC_HARD_RESET:
1144 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1147 case PHY_FUNC_LINK_RESET:
1148 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1150 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1153 case PHY_FUNC_DISABLE:
1154 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1157 case PHY_FUNC_SET_LINK_RATE:
1158 return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1159 case PHY_FUNC_GET_EVENTS:
1160 if (hisi_hba->hw->get_events) {
1161 hisi_hba->hw->get_events(hisi_hba, phy_no);
1165 case PHY_FUNC_RELEASE_SPINUP_HOLD:
1172 static void hisi_sas_task_done(struct sas_task *task)
1174 del_timer(&task->slow_task->timer);
1175 complete(&task->slow_task->completion);
1178 static void hisi_sas_tmf_timedout(struct timer_list *t)
1180 struct sas_task_slow *slow = from_timer(slow, t, timer);
1181 struct sas_task *task = slow->task;
1182 unsigned long flags;
1183 bool is_completed = true;
1185 spin_lock_irqsave(&task->task_state_lock, flags);
1186 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1187 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1188 is_completed = false;
1190 spin_unlock_irqrestore(&task->task_state_lock, flags);
1193 complete(&task->slow_task->completion);
1196 #define TASK_TIMEOUT (20 * HZ)
1197 #define TASK_RETRY 3
1198 #define INTERNAL_ABORT_TIMEOUT (6 * HZ)
1199 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
1200 void *parameter, u32 para_len,
1201 struct hisi_sas_tmf_task *tmf)
1203 struct hisi_sas_device *sas_dev = device->lldd_dev;
1204 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1205 struct device *dev = hisi_hba->dev;
1206 struct sas_task *task;
1209 for (retry = 0; retry < TASK_RETRY; retry++) {
1210 task = sas_alloc_slow_task(GFP_KERNEL);
1215 task->task_proto = device->tproto;
1217 if (dev_is_sata(device)) {
1218 task->ata_task.device_control_reg_update = 1;
1219 memcpy(&task->ata_task.fis, parameter, para_len);
1221 memcpy(&task->ssp_task, parameter, para_len);
1223 task->task_done = hisi_sas_task_done;
1225 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1226 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT;
1227 add_timer(&task->slow_task->timer);
1229 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
1232 del_timer(&task->slow_task->timer);
1233 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
1238 wait_for_completion(&task->slow_task->completion);
1239 res = TMF_RESP_FUNC_FAILED;
1240 /* Even TMF timed out, return direct. */
1241 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1242 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1243 struct hisi_sas_slot *slot = task->lldd_task;
1245 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1247 struct hisi_sas_cq *cq =
1248 &hisi_hba->cq[slot->dlvry_queue];
1250 * sync irq to avoid free'ing task
1251 * before using task in IO completion
1253 synchronize_irq(cq->irq_no);
1259 dev_err(dev, "abort tmf: TMF task timeout\n");
1262 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1263 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1264 res = TMF_RESP_FUNC_COMPLETE;
1268 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1269 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1270 res = TMF_RESP_FUNC_SUCC;
1274 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1275 task->task_status.stat == SAS_DATA_UNDERRUN) {
1276 /* no error, but return the number of bytes of
1279 dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x sts 0x%x underrun\n",
1280 SAS_ADDR(device->sas_addr),
1281 task->task_status.resp,
1282 task->task_status.stat);
1283 res = task->task_status.residual;
1287 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1288 task->task_status.stat == SAS_DATA_OVERRUN) {
1289 dev_warn(dev, "abort tmf: blocked task error\n");
1294 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1295 task->task_status.stat == SAS_OPEN_REJECT) {
1296 dev_warn(dev, "abort tmf: open reject failed\n");
1299 dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x status 0x%x\n",
1300 SAS_ADDR(device->sas_addr),
1301 task->task_status.resp,
1302 task->task_status.stat);
1304 sas_free_task(task);
1308 if (retry == TASK_RETRY)
1309 dev_warn(dev, "abort tmf: executing internal task failed!\n");
1310 sas_free_task(task);
1314 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1315 bool reset, int pmp, u8 *fis)
1317 struct ata_taskfile tf;
1319 ata_tf_init(dev, &tf);
1323 tf.ctl &= ~ATA_SRST;
1324 tf.command = ATA_CMD_DEV_RESET;
1325 ata_tf_to_fis(&tf, pmp, 0, fis);
1328 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1331 struct ata_port *ap = device->sata_dev.ap;
1332 struct ata_link *link;
1333 int rc = TMF_RESP_FUNC_FAILED;
1334 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1335 struct device *dev = hisi_hba->dev;
1336 int s = sizeof(struct host_to_dev_fis);
1338 ata_for_each_link(link, ap, EDGE) {
1339 int pmp = sata_srst_pmp(link);
1341 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1342 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1343 if (rc != TMF_RESP_FUNC_COMPLETE)
1347 if (rc == TMF_RESP_FUNC_COMPLETE) {
1348 ata_for_each_link(link, ap, EDGE) {
1349 int pmp = sata_srst_pmp(link);
1351 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1352 rc = hisi_sas_exec_internal_tmf_task(device, fis,
1354 if (rc != TMF_RESP_FUNC_COMPLETE)
1355 dev_err(dev, "ata disk %016llx de-reset failed\n",
1356 SAS_ADDR(device->sas_addr));
1359 dev_err(dev, "ata disk %016llx reset failed\n",
1360 SAS_ADDR(device->sas_addr));
1363 if (rc == TMF_RESP_FUNC_COMPLETE)
1364 hisi_sas_release_task(hisi_hba, device);
1369 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1370 u8 *lun, struct hisi_sas_tmf_task *tmf)
1372 struct sas_ssp_task ssp_task;
1374 if (!(device->tproto & SAS_PROTOCOL_SSP))
1375 return TMF_RESP_FUNC_ESUPP;
1377 memcpy(ssp_task.LUN, lun, 8);
1379 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1380 sizeof(ssp_task), tmf);
1383 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1385 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1388 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1389 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1390 struct domain_device *device = sas_dev->sas_device;
1391 struct asd_sas_port *sas_port;
1392 struct hisi_sas_port *port;
1393 struct hisi_sas_phy *phy = NULL;
1394 struct asd_sas_phy *sas_phy;
1396 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1397 || !device || !device->port)
1400 sas_port = device->port;
1401 port = to_hisi_sas_port(sas_port);
1403 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1404 if (state & BIT(sas_phy->id)) {
1405 phy = sas_phy->lldd_phy;
1410 port->id = phy->port_id;
1412 /* Update linkrate of directly attached device. */
1413 if (!device->parent)
1414 device->linkrate = phy->sas_phy.linkrate;
1416 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1422 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1424 struct asd_sas_port *_sas_port = NULL;
1427 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1428 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1429 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1430 struct asd_sas_port *sas_port = sas_phy->port;
1431 bool do_port_check = _sas_port != sas_port;
1433 if (!sas_phy->phy->enabled)
1436 /* Report PHY state change to libsas */
1437 if (state & BIT(phy_no)) {
1438 if (do_port_check && sas_port && sas_port->port_dev) {
1439 struct domain_device *dev = sas_port->port_dev;
1441 _sas_port = sas_port;
1443 if (dev_is_expander(dev->dev_type))
1444 sas_notify_port_event(sas_phy,
1445 PORTE_BROADCAST_RCVD,
1449 hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1454 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1456 struct hisi_sas_device *sas_dev;
1457 struct domain_device *device;
1460 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1461 sas_dev = &hisi_hba->devices[i];
1462 device = sas_dev->sas_device;
1464 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1467 hisi_sas_init_device(device);
1471 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1472 struct asd_sas_port *sas_port,
1473 struct domain_device *device)
1475 struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
1476 struct ata_port *ap = device->sata_dev.ap;
1477 struct device *dev = hisi_hba->dev;
1478 int s = sizeof(struct host_to_dev_fis);
1479 int rc = TMF_RESP_FUNC_FAILED;
1480 struct asd_sas_phy *sas_phy;
1481 struct ata_link *link;
1485 state = hisi_hba->hw->get_phys_state(hisi_hba);
1486 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) {
1487 if (!(state & BIT(sas_phy->id)))
1490 ata_for_each_link(link, ap, EDGE) {
1491 int pmp = sata_srst_pmp(link);
1493 tmf_task.phy_id = sas_phy->id;
1494 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1495 rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
1497 if (rc != TMF_RESP_FUNC_COMPLETE) {
1498 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1506 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1508 struct device *dev = hisi_hba->dev;
1511 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1512 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1513 struct domain_device *device = sas_dev->sas_device;
1515 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1518 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1519 HISI_SAS_INT_ABT_DEV, 0,
1522 dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1525 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1526 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1527 struct asd_sas_port *sas_port = &port->sas_port;
1528 struct domain_device *port_dev = sas_port->port_dev;
1529 struct domain_device *device;
1531 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1534 /* Try to find a SATA device */
1535 list_for_each_entry(device, &sas_port->dev_list,
1537 if (dev_is_sata(device)) {
1538 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1547 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1549 struct Scsi_Host *shost = hisi_hba->shost;
1551 down(&hisi_hba->sem);
1552 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1554 scsi_block_requests(shost);
1555 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1557 if (timer_pending(&hisi_hba->timer))
1558 del_timer_sync(&hisi_hba->timer);
1560 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1562 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1564 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1566 struct Scsi_Host *shost = hisi_hba->shost;
1568 /* Init and wait for PHYs to come up and all libsas event finished. */
1569 hisi_hba->hw->phys_init(hisi_hba);
1571 hisi_sas_refresh_port_id(hisi_hba);
1572 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1574 if (hisi_hba->reject_stp_links_msk)
1575 hisi_sas_terminate_stp_reject(hisi_hba);
1576 hisi_sas_reset_init_all_devices(hisi_hba);
1578 scsi_unblock_requests(shost);
1579 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1581 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1583 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1585 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1587 if (!hisi_hba->hw->soft_reset)
1590 if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1593 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1594 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1599 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1601 struct device *dev = hisi_hba->dev;
1602 struct Scsi_Host *shost = hisi_hba->shost;
1605 dev_info(dev, "controller resetting...\n");
1606 hisi_sas_controller_reset_prepare(hisi_hba);
1608 rc = hisi_hba->hw->soft_reset(hisi_hba);
1610 dev_warn(dev, "controller reset failed (%d)\n", rc);
1611 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1613 scsi_unblock_requests(shost);
1614 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1618 hisi_sas_controller_reset_done(hisi_hba);
1619 clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1620 dev_info(dev, "controller reset complete\n");
1625 static int hisi_sas_abort_task(struct sas_task *task)
1627 struct scsi_lun lun;
1628 struct hisi_sas_tmf_task tmf_task;
1629 struct domain_device *device = task->dev;
1630 struct hisi_sas_device *sas_dev = device->lldd_dev;
1631 struct hisi_hba *hisi_hba;
1633 int rc = TMF_RESP_FUNC_FAILED;
1634 unsigned long flags;
1637 return TMF_RESP_FUNC_FAILED;
1639 hisi_hba = dev_to_hisi_hba(task->dev);
1640 dev = hisi_hba->dev;
1642 spin_lock_irqsave(&task->task_state_lock, flags);
1643 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1644 struct hisi_sas_slot *slot = task->lldd_task;
1645 struct hisi_sas_cq *cq;
1649 * sync irq to avoid free'ing task
1650 * before using task in IO completion
1652 cq = &hisi_hba->cq[slot->dlvry_queue];
1653 synchronize_irq(cq->irq_no);
1655 spin_unlock_irqrestore(&task->task_state_lock, flags);
1656 rc = TMF_RESP_FUNC_COMPLETE;
1659 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1660 spin_unlock_irqrestore(&task->task_state_lock, flags);
1662 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1663 struct scsi_cmnd *cmnd = task->uldd_task;
1664 struct hisi_sas_slot *slot = task->lldd_task;
1665 u16 tag = slot->idx;
1668 int_to_scsilun(cmnd->device->lun, &lun);
1669 tmf_task.tmf = TMF_ABORT_TASK;
1670 tmf_task.tag_of_task_to_be_managed = tag;
1672 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1675 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1676 HISI_SAS_INT_ABT_CMD, tag,
1679 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1680 return TMF_RESP_FUNC_FAILED;
1684 * If the TMF finds that the IO is not in the device and also
1685 * the internal abort does not succeed, then it is safe to
1687 * Note: if the internal abort succeeds then the slot
1688 * will have already been completed
1690 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1691 if (task->lldd_task)
1692 hisi_sas_do_release_task(hisi_hba, task, slot);
1694 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1695 task->task_proto & SAS_PROTOCOL_STP) {
1696 if (task->dev->dev_type == SAS_SATA_DEV) {
1697 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1698 HISI_SAS_INT_ABT_DEV,
1701 dev_err(dev, "abort task: internal abort failed\n");
1704 hisi_sas_dereg_device(hisi_hba, device);
1705 rc = hisi_sas_softreset_ata_disk(device);
1707 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1709 struct hisi_sas_slot *slot = task->lldd_task;
1710 u32 tag = slot->idx;
1711 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1713 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1714 HISI_SAS_INT_ABT_CMD, tag,
1716 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1719 * sync irq to avoid free'ing task
1720 * before using task in IO completion
1722 synchronize_irq(cq->irq_no);
1728 if (rc != TMF_RESP_FUNC_COMPLETE)
1729 dev_notice(dev, "abort task: rc=%d\n", rc);
1733 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1735 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1736 struct device *dev = hisi_hba->dev;
1737 struct hisi_sas_tmf_task tmf_task;
1740 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1741 HISI_SAS_INT_ABT_DEV, 0, false);
1743 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1744 return TMF_RESP_FUNC_FAILED;
1746 hisi_sas_dereg_device(hisi_hba, device);
1748 tmf_task.tmf = TMF_ABORT_TASK_SET;
1749 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1751 if (rc == TMF_RESP_FUNC_COMPLETE)
1752 hisi_sas_release_task(hisi_hba, device);
1757 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1759 struct hisi_sas_tmf_task tmf_task;
1762 tmf_task.tmf = TMF_CLEAR_ACA;
1763 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1768 #define I_T_NEXUS_RESET_PHYUP_TIMEOUT (2 * HZ)
1770 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1772 struct sas_phy *local_phy = sas_get_local_phy(device);
1773 struct hisi_sas_device *sas_dev = device->lldd_dev;
1774 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1775 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1776 DECLARE_COMPLETION_ONSTACK(phyreset);
1779 if (!local_phy->enabled) {
1780 sas_put_local_phy(local_phy);
1784 if (scsi_is_sas_phy_local(local_phy)) {
1785 struct asd_sas_phy *sas_phy =
1786 sas_ha->sas_phy[local_phy->number];
1787 struct hisi_sas_phy *phy =
1788 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1790 phy->reset_completion = &phyreset;
1793 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1794 !dev_is_sata(device)) ? true : false;
1796 rc = sas_phy_reset(local_phy, reset_type);
1797 sas_put_local_phy(local_phy);
1799 if (scsi_is_sas_phy_local(local_phy)) {
1800 struct asd_sas_phy *sas_phy =
1801 sas_ha->sas_phy[local_phy->number];
1802 struct hisi_sas_phy *phy =
1803 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1804 int ret = wait_for_completion_timeout(&phyreset,
1805 I_T_NEXUS_RESET_PHYUP_TIMEOUT);
1806 unsigned long flags;
1808 spin_lock_irqsave(&phy->lock, flags);
1809 phy->reset_completion = NULL;
1811 spin_unlock_irqrestore(&phy->lock, flags);
1813 /* report PHY down if timed out */
1815 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1816 } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) {
1818 * If in init state, we rely on caller to wait for link to be
1819 * ready; otherwise, except phy reset is fail, delay.
1828 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1830 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1831 struct device *dev = hisi_hba->dev;
1834 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1835 HISI_SAS_INT_ABT_DEV, 0, false);
1837 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1838 return TMF_RESP_FUNC_FAILED;
1840 hisi_sas_dereg_device(hisi_hba, device);
1842 if (dev_is_sata(device)) {
1843 rc = hisi_sas_softreset_ata_disk(device);
1844 if (rc == TMF_RESP_FUNC_FAILED)
1845 return TMF_RESP_FUNC_FAILED;
1848 rc = hisi_sas_debug_I_T_nexus_reset(device);
1850 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1851 hisi_sas_release_task(hisi_hba, device);
1856 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1858 struct hisi_sas_device *sas_dev = device->lldd_dev;
1859 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1860 struct device *dev = hisi_hba->dev;
1861 int rc = TMF_RESP_FUNC_FAILED;
1863 /* Clear internal IO and then lu reset */
1864 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1865 HISI_SAS_INT_ABT_DEV, 0, false);
1867 dev_err(dev, "lu_reset: internal abort failed\n");
1870 hisi_sas_dereg_device(hisi_hba, device);
1872 if (dev_is_sata(device)) {
1873 struct sas_phy *phy;
1875 phy = sas_get_local_phy(device);
1877 rc = sas_phy_reset(phy, true);
1880 hisi_sas_release_task(hisi_hba, device);
1881 sas_put_local_phy(phy);
1883 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1885 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1886 if (rc == TMF_RESP_FUNC_COMPLETE)
1887 hisi_sas_release_task(hisi_hba, device);
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);
1896 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1898 struct domain_device *device = data;
1899 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
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);
1908 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1910 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1911 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1912 ASYNC_DOMAIN_EXCLUSIVE(async);
1915 queue_work(hisi_hba->wq, &r.work);
1916 wait_for_completion(r.completion);
1918 return TMF_RESP_FUNC_FAILED;
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;
1924 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1925 dev_is_expander(device->dev_type))
1928 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1932 async_synchronize_full_domain(&async);
1933 hisi_sas_release_tasks(hisi_hba);
1935 return TMF_RESP_FUNC_COMPLETE;
1938 static int hisi_sas_query_task(struct sas_task *task)
1940 struct scsi_lun lun;
1941 struct hisi_sas_tmf_task tmf_task;
1942 int rc = TMF_RESP_FUNC_FAILED;
1944 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1945 struct scsi_cmnd *cmnd = task->uldd_task;
1946 struct domain_device *device = task->dev;
1947 struct hisi_sas_slot *slot = task->lldd_task;
1948 u32 tag = slot->idx;
1950 int_to_scsilun(cmnd->device->lun, &lun);
1951 tmf_task.tmf = TMF_QUERY_TASK;
1952 tmf_task.tag_of_task_to_be_managed = tag;
1954 rc = hisi_sas_debug_issue_ssp_tmf(device,
1958 /* The task is still in Lun, release it then */
1959 case TMF_RESP_FUNC_SUCC:
1960 /* The task is not in Lun or failed, reset the phy */
1961 case TMF_RESP_FUNC_FAILED:
1962 case TMF_RESP_FUNC_COMPLETE:
1965 rc = TMF_RESP_FUNC_FAILED;
1973 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1974 struct sas_task *task, int abort_flag,
1975 int task_tag, struct hisi_sas_dq *dq)
1977 struct domain_device *device = task->dev;
1978 struct hisi_sas_device *sas_dev = device->lldd_dev;
1979 struct device *dev = hisi_hba->dev;
1980 struct hisi_sas_port *port;
1981 struct hisi_sas_slot *slot;
1982 struct asd_sas_port *sas_port = device->port;
1983 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1984 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1985 unsigned long flags;
1988 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1994 port = to_hisi_sas_port(sas_port);
1996 /* simply get a slot and send abort command */
1997 rc = hisi_sas_slot_index_alloc(hisi_hba, NULL);
2002 slot = &hisi_hba->slot_info[slot_idx];
2004 spin_lock(&dq->lock);
2005 wr_q_index = dq->wr_point;
2006 dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
2007 list_add_tail(&slot->delivery, &dq->list);
2008 spin_unlock(&dq->lock);
2009 spin_lock(&sas_dev->lock);
2010 list_add_tail(&slot->entry, &sas_dev->list);
2011 spin_unlock(&sas_dev->lock);
2013 dlvry_queue = dq->id;
2014 dlvry_queue_slot = wr_q_index;
2016 slot->device_id = sas_dev->device_id;
2017 slot->n_elem = n_elem;
2018 slot->dlvry_queue = dlvry_queue;
2019 slot->dlvry_queue_slot = dlvry_queue_slot;
2020 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
2021 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
2024 slot->is_internal = true;
2025 task->lldd_task = slot;
2027 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
2028 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
2029 memset(hisi_sas_status_buf_addr_mem(slot), 0,
2030 sizeof(struct hisi_sas_err_record));
2032 hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
2033 abort_flag, task_tag);
2035 spin_lock_irqsave(&task->task_state_lock, flags);
2036 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
2037 spin_unlock_irqrestore(&task->task_state_lock, flags);
2038 WRITE_ONCE(slot->ready, 1);
2039 /* send abort command to the chip */
2040 spin_lock(&dq->lock);
2041 hisi_hba->hw->start_delivery(dq);
2042 spin_unlock(&dq->lock);
2047 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
2053 * _hisi_sas_internal_task_abort -- execute an internal
2054 * abort command for single IO command or a device
2055 * @hisi_hba: host controller struct
2056 * @device: domain device
2057 * @abort_flag: mode of operation, device or single IO
2058 * @tag: tag of IO to be aborted (only relevant to single
2060 * @dq: delivery queue for this internal abort command
2061 * @rst_to_recover: If rst_to_recover set, queue a controller
2062 * reset if an internal abort times out.
2065 _hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2066 struct domain_device *device, int abort_flag,
2067 int tag, struct hisi_sas_dq *dq, bool rst_to_recover)
2069 struct sas_task *task;
2070 struct hisi_sas_device *sas_dev = device->lldd_dev;
2071 struct device *dev = hisi_hba->dev;
2075 * The interface is not realized means this HW don't support internal
2076 * abort, or don't need to do internal abort. Then here, we return
2077 * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
2078 * the internal abort has been executed and returned CQ.
2080 if (!hisi_hba->hw->prep_abort)
2081 return TMF_RESP_FUNC_FAILED;
2083 if (test_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags))
2086 task = sas_alloc_slow_task(GFP_KERNEL);
2091 task->task_proto = device->tproto;
2092 task->task_done = hisi_sas_task_done;
2093 task->slow_task->timer.function = hisi_sas_tmf_timedout;
2094 task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT;
2095 add_timer(&task->slow_task->timer);
2097 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
2098 task, abort_flag, tag, dq);
2100 del_timer(&task->slow_task->timer);
2101 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
2105 wait_for_completion(&task->slow_task->completion);
2106 res = TMF_RESP_FUNC_FAILED;
2108 /* Internal abort timed out */
2109 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
2110 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
2111 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
2113 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
2114 struct hisi_sas_slot *slot = task->lldd_task;
2116 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
2119 struct hisi_sas_cq *cq =
2120 &hisi_hba->cq[slot->dlvry_queue];
2122 * sync irq to avoid free'ing task
2123 * before using task in IO completion
2125 synchronize_irq(cq->irq_no);
2129 if (rst_to_recover) {
2130 dev_err(dev, "internal task abort: timeout and not done. Queuing reset.\n");
2131 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2133 dev_err(dev, "internal task abort: timeout and not done.\n");
2139 dev_err(dev, "internal task abort: timeout.\n");
2142 if (task->task_status.resp == SAS_TASK_COMPLETE &&
2143 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
2144 res = TMF_RESP_FUNC_COMPLETE;
2148 if (task->task_status.resp == SAS_TASK_COMPLETE &&
2149 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
2150 res = TMF_RESP_FUNC_SUCC;
2155 dev_dbg(dev, "internal task abort: task to dev %016llx task=%pK resp: 0x%x sts 0x%x\n",
2156 SAS_ADDR(device->sas_addr), task,
2157 task->task_status.resp, /* 0 is complete, -1 is undelivered */
2158 task->task_status.stat);
2159 sas_free_task(task);
2165 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2166 struct domain_device *device,
2167 int abort_flag, int tag, bool rst_to_recover)
2169 struct hisi_sas_slot *slot;
2170 struct device *dev = hisi_hba->dev;
2171 struct hisi_sas_dq *dq;
2174 switch (abort_flag) {
2175 case HISI_SAS_INT_ABT_CMD:
2176 slot = &hisi_hba->slot_info[tag];
2177 dq = &hisi_hba->dq[slot->dlvry_queue];
2178 return _hisi_sas_internal_task_abort(hisi_hba, device,
2179 abort_flag, tag, dq,
2181 case HISI_SAS_INT_ABT_DEV:
2182 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2183 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2184 const struct cpumask *mask = cq->irq_mask;
2186 if (mask && !cpumask_intersects(cpu_online_mask, mask))
2188 dq = &hisi_hba->dq[i];
2189 rc = _hisi_sas_internal_task_abort(hisi_hba, device,
2191 dq, rst_to_recover);
2197 dev_err(dev, "Unrecognised internal abort flag (%d)\n",
2205 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2207 hisi_sas_port_notify_formed(sas_phy);
2210 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2211 u8 reg_index, u8 reg_count, u8 *write_data)
2213 struct hisi_hba *hisi_hba = sha->lldd_ha;
2215 if (!hisi_hba->hw->write_gpio)
2218 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2219 reg_index, reg_count, write_data);
2222 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2224 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2225 struct sas_phy *sphy = sas_phy->phy;
2226 unsigned long flags;
2228 phy->phy_attached = 0;
2232 spin_lock_irqsave(&phy->lock, flags);
2234 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2236 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2237 spin_unlock_irqrestore(&phy->lock, flags);
2240 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2243 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2244 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2245 struct device *dev = hisi_hba->dev;
2248 /* Phy down but ready */
2249 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2250 hisi_sas_port_notify_formed(sas_phy);
2252 struct hisi_sas_port *port = phy->port;
2254 if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
2256 dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2259 /* Phy down and not ready */
2260 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2261 sas_phy_disconnected(sas_phy);
2264 if (phy->phy_type & PORT_TYPE_SAS) {
2265 int port_id = port->id;
2267 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2269 port->port_attached = 0;
2270 } else if (phy->phy_type & PORT_TYPE_SATA)
2271 port->port_attached = 0;
2273 hisi_sas_phy_disconnected(phy);
2276 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2278 void hisi_sas_sync_irqs(struct hisi_hba *hisi_hba)
2282 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2283 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2285 synchronize_irq(cq->irq_no);
2288 EXPORT_SYMBOL_GPL(hisi_sas_sync_irqs);
2290 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2292 struct hisi_hba *hisi_hba = shost_priv(shost);
2294 if (reset_type != SCSI_ADAPTER_RESET)
2297 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2301 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2303 struct scsi_transport_template *hisi_sas_stt;
2304 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2306 static struct sas_domain_function_template hisi_sas_transport_ops = {
2307 .lldd_dev_found = hisi_sas_dev_found,
2308 .lldd_dev_gone = hisi_sas_dev_gone,
2309 .lldd_execute_task = hisi_sas_queue_command,
2310 .lldd_control_phy = hisi_sas_control_phy,
2311 .lldd_abort_task = hisi_sas_abort_task,
2312 .lldd_abort_task_set = hisi_sas_abort_task_set,
2313 .lldd_clear_aca = hisi_sas_clear_aca,
2314 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
2315 .lldd_lu_reset = hisi_sas_lu_reset,
2316 .lldd_query_task = hisi_sas_query_task,
2317 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
2318 .lldd_port_formed = hisi_sas_port_formed,
2319 .lldd_write_gpio = hisi_sas_write_gpio,
2322 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2324 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2325 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2327 for (i = 0; i < hisi_hba->queue_count; i++) {
2328 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2329 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2330 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2332 s = sizeof(struct hisi_sas_cmd_hdr);
2333 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2334 memset(&cmd_hdr[j], 0, s);
2338 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2339 memset(hisi_hba->complete_hdr[i], 0, s);
2343 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2344 memset(hisi_hba->initial_fis, 0, s);
2346 s = max_command_entries * sizeof(struct hisi_sas_iost);
2347 memset(hisi_hba->iost, 0, s);
2349 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2350 memset(hisi_hba->breakpoint, 0, s);
2352 s = sizeof(struct hisi_sas_sata_breakpoint);
2353 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2354 memset(&sata_breakpoint[j], 0, s);
2356 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2358 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2360 struct device *dev = hisi_hba->dev;
2361 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2362 int max_command_entries_ru, sz_slot_buf_ru;
2363 int blk_cnt, slots_per_blk;
2365 sema_init(&hisi_hba->sem, 1);
2366 spin_lock_init(&hisi_hba->lock);
2367 for (i = 0; i < hisi_hba->n_phy; i++) {
2368 hisi_sas_phy_init(hisi_hba, i);
2369 hisi_hba->port[i].port_attached = 0;
2370 hisi_hba->port[i].id = -1;
2373 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2374 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2375 hisi_hba->devices[i].device_id = i;
2376 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2379 for (i = 0; i < hisi_hba->queue_count; i++) {
2380 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2381 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2383 /* Completion queue structure */
2385 cq->hisi_hba = hisi_hba;
2387 /* Delivery queue structure */
2388 spin_lock_init(&dq->lock);
2389 INIT_LIST_HEAD(&dq->list);
2391 dq->hisi_hba = hisi_hba;
2393 /* Delivery queue */
2394 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2395 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2396 &hisi_hba->cmd_hdr_dma[i],
2398 if (!hisi_hba->cmd_hdr[i])
2401 /* Completion queue */
2402 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2403 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2404 &hisi_hba->complete_hdr_dma[i],
2406 if (!hisi_hba->complete_hdr[i])
2410 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2411 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2413 if (!hisi_hba->itct)
2416 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2417 sizeof(struct hisi_sas_slot),
2419 if (!hisi_hba->slot_info)
2422 /* roundup to avoid overly large block size */
2423 max_command_entries_ru = roundup(max_command_entries, 64);
2424 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2425 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2427 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2428 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2429 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2430 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2431 slots_per_blk = s / sz_slot_buf_ru;
2433 for (i = 0; i < blk_cnt; i++) {
2434 int slot_index = i * slots_per_blk;
2438 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2443 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2444 struct hisi_sas_slot *slot;
2446 slot = &hisi_hba->slot_info[slot_index];
2448 slot->buf_dma = buf_dma;
2449 slot->idx = slot_index;
2451 buf += sz_slot_buf_ru;
2452 buf_dma += sz_slot_buf_ru;
2456 s = max_command_entries * sizeof(struct hisi_sas_iost);
2457 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2459 if (!hisi_hba->iost)
2462 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2463 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2464 &hisi_hba->breakpoint_dma,
2466 if (!hisi_hba->breakpoint)
2469 hisi_hba->slot_index_count = max_command_entries;
2470 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
2471 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
2472 if (!hisi_hba->slot_index_tags)
2475 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2476 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2477 &hisi_hba->initial_fis_dma,
2479 if (!hisi_hba->initial_fis)
2482 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2483 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2484 &hisi_hba->sata_breakpoint_dma,
2486 if (!hisi_hba->sata_breakpoint)
2489 hisi_sas_slot_index_init(hisi_hba);
2490 hisi_hba->last_slot_index = HISI_SAS_UNRESERVED_IPTT;
2492 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2493 if (!hisi_hba->wq) {
2494 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2502 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2504 void hisi_sas_free(struct hisi_hba *hisi_hba)
2508 for (i = 0; i < hisi_hba->n_phy; i++) {
2509 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2511 del_timer_sync(&phy->timer);
2515 destroy_workqueue(hisi_hba->wq);
2517 EXPORT_SYMBOL_GPL(hisi_sas_free);
2519 void hisi_sas_rst_work_handler(struct work_struct *work)
2521 struct hisi_hba *hisi_hba =
2522 container_of(work, struct hisi_hba, rst_work);
2524 if (hisi_sas_controller_prereset(hisi_hba))
2527 hisi_sas_controller_reset(hisi_hba);
2529 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2531 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2533 struct hisi_sas_rst *rst =
2534 container_of(work, struct hisi_sas_rst, work);
2536 if (hisi_sas_controller_prereset(rst->hisi_hba))
2539 if (!hisi_sas_controller_reset(rst->hisi_hba))
2542 complete(rst->completion);
2544 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2546 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2548 struct device *dev = hisi_hba->dev;
2549 struct platform_device *pdev = hisi_hba->platform_dev;
2550 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2553 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2555 dev_err(dev, "could not get property sas-addr\n");
2561 * These properties are only required for platform device-based
2562 * controller with DT firmware.
2564 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2565 "hisilicon,sas-syscon");
2566 if (IS_ERR(hisi_hba->ctrl)) {
2567 dev_err(dev, "could not get syscon\n");
2571 if (device_property_read_u32(dev, "ctrl-reset-reg",
2572 &hisi_hba->ctrl_reset_reg)) {
2573 dev_err(dev, "could not get property ctrl-reset-reg\n");
2577 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2578 &hisi_hba->ctrl_reset_sts_reg)) {
2579 dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2583 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2584 &hisi_hba->ctrl_clock_ena_reg)) {
2585 dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2590 refclk = devm_clk_get(dev, NULL);
2592 dev_dbg(dev, "no ref clk property\n");
2594 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2596 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2597 dev_err(dev, "could not get property phy-count\n");
2601 if (device_property_read_u32(dev, "queue-count",
2602 &hisi_hba->queue_count)) {
2603 dev_err(dev, "could not get property queue-count\n");
2609 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2611 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2612 const struct hisi_sas_hw *hw)
2614 struct resource *res;
2615 struct Scsi_Host *shost;
2616 struct hisi_hba *hisi_hba;
2617 struct device *dev = &pdev->dev;
2620 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2622 dev_err(dev, "scsi host alloc failed\n");
2625 hisi_hba = shost_priv(shost);
2627 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2629 hisi_hba->dev = dev;
2630 hisi_hba->platform_dev = pdev;
2631 hisi_hba->shost = shost;
2632 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2634 timer_setup(&hisi_hba->timer, NULL, 0);
2636 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2639 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2641 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
2644 dev_err(dev, "No usable DMA addressing method\n");
2648 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2649 if (IS_ERR(hisi_hba->regs))
2652 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2654 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2655 if (IS_ERR(hisi_hba->sgpio_regs))
2659 if (hisi_sas_alloc(hisi_hba)) {
2660 hisi_sas_free(hisi_hba);
2666 scsi_host_put(shost);
2667 dev_err(dev, "shost alloc failed\n");
2671 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2673 if (hisi_hba->hw->interrupt_preinit)
2674 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2678 int hisi_sas_probe(struct platform_device *pdev,
2679 const struct hisi_sas_hw *hw)
2681 struct Scsi_Host *shost;
2682 struct hisi_hba *hisi_hba;
2683 struct device *dev = &pdev->dev;
2684 struct asd_sas_phy **arr_phy;
2685 struct asd_sas_port **arr_port;
2686 struct sas_ha_struct *sha;
2687 int rc, phy_nr, port_nr, i;
2689 shost = hisi_sas_shost_alloc(pdev, hw);
2693 sha = SHOST_TO_SAS_HA(shost);
2694 hisi_hba = shost_priv(shost);
2695 platform_set_drvdata(pdev, sha);
2697 phy_nr = port_nr = hisi_hba->n_phy;
2699 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2700 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2701 if (!arr_phy || !arr_port) {
2706 sha->sas_phy = arr_phy;
2707 sha->sas_port = arr_port;
2708 sha->lldd_ha = hisi_hba;
2710 shost->transportt = hisi_sas_stt;
2711 shost->max_id = HISI_SAS_MAX_DEVICES;
2712 shost->max_lun = ~0;
2713 shost->max_channel = 1;
2714 shost->max_cmd_len = 16;
2715 if (hisi_hba->hw->slot_index_alloc) {
2716 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2717 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2719 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2720 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2723 sha->sas_ha_name = DRV_NAME;
2724 sha->dev = hisi_hba->dev;
2725 sha->lldd_module = THIS_MODULE;
2726 sha->sas_addr = &hisi_hba->sas_addr[0];
2727 sha->num_phys = hisi_hba->n_phy;
2728 sha->core.shost = hisi_hba->shost;
2730 for (i = 0; i < hisi_hba->n_phy; i++) {
2731 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2732 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2735 rc = hisi_sas_interrupt_preinit(hisi_hba);
2739 rc = scsi_add_host(shost, &pdev->dev);
2743 rc = sas_register_ha(sha);
2745 goto err_out_register_ha;
2747 rc = hisi_hba->hw->hw_init(hisi_hba);
2749 goto err_out_hw_init;
2751 scsi_scan_host(shost);
2756 sas_unregister_ha(sha);
2757 err_out_register_ha:
2758 scsi_remove_host(shost);
2760 hisi_sas_free(hisi_hba);
2761 scsi_host_put(shost);
2764 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2766 int hisi_sas_remove(struct platform_device *pdev)
2768 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2769 struct hisi_hba *hisi_hba = sha->lldd_ha;
2770 struct Scsi_Host *shost = sha->core.shost;
2772 if (timer_pending(&hisi_hba->timer))
2773 del_timer(&hisi_hba->timer);
2775 sas_unregister_ha(sha);
2776 sas_remove_host(sha->core.shost);
2778 hisi_sas_free(hisi_hba);
2779 scsi_host_put(shost);
2782 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2784 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2785 #define DEBUGFS_ENABLE_DEFAULT "enabled"
2786 bool hisi_sas_debugfs_enable = true;
2787 u32 hisi_sas_debugfs_dump_count = 50;
2789 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2790 bool hisi_sas_debugfs_enable;
2791 u32 hisi_sas_debugfs_dump_count = 1;
2794 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2795 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2796 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2797 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2799 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2800 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2801 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2803 struct dentry *hisi_sas_debugfs_dir;
2804 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2806 static __init int hisi_sas_init(void)
2808 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2812 if (hisi_sas_debugfs_enable) {
2813 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2814 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2815 pr_info("hisi_sas: Limiting debugfs dump count\n");
2816 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2823 static __exit void hisi_sas_exit(void)
2825 sas_release_transport(hisi_sas_stt);
2827 debugfs_remove(hisi_sas_debugfs_dir);
2830 module_init(hisi_sas_init);
2831 module_exit(hisi_sas_exit);
2833 MODULE_LICENSE("GPL");
2834 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2835 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2836 MODULE_ALIAS("platform:" DRV_NAME);