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, enable: 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(lock: &hisi_hba->lock);
167 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
168 spin_unlock(lock: &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(lock: &hisi_hba->lock);
189 index = find_next_zero_bit(addr: bitmap, HISI_SAS_RESERVED_IPTT,
190 offset: hisi_hba->last_slot_index + 1);
191 if (index >= HISI_SAS_RESERVED_IPTT) {
192 index = find_next_zero_bit(addr: bitmap,
193 HISI_SAS_RESERVED_IPTT,
194 offset: 0);
195 if (index >= HISI_SAS_RESERVED_IPTT) {
196 spin_unlock(lock: &hisi_hba->lock);
197 return -SAS_QUEUE_FULL;
198 }
199 }
200 hisi_sas_slot_index_set(hisi_hba, slot_idx: index);
201 hisi_hba->last_slot_index = index;
202 spin_unlock(lock: &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(proto: 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(lock: &sas_dev->lock);
244 list_del_init(entry: &slot->entry);
245 spin_unlock(lock: &sas_dev->lock);
246 } else {
247 list_del_init(entry: &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: 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(proto: 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(proto: 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: *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(cmd: 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(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(new: &slot->delivery, head: &dq->list);
412 spin_unlock(lock: &dq->lock);
413 spin_lock(lock: &sas_dev->lock);
414 list_add_tail(new: &slot->entry, head: &sas_dev->list);
415 spin_unlock(lock: &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(lock: &dq->lock);
457 hisi_hba->hw->start_delivery(dq);
458 spin_unlock(lock: &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(sem: &hisi_hba->sem);
504 up(sem: &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(unique_tag: 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: &n_elem);
576 if (rc < 0)
577 goto prep_out;
578
579 if (!sas_protocol_ata(proto: task->task_proto)) {
580 rc = hisi_sas_dif_dma_map(hisi_hba, n_elem_dif: &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(proto: 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(phy: sas_phy, event: 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(phy: sas_phy, event: 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(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(list: &hisi_hba->devices[i].list);
680 break;
681 }
682 i++;
683 }
684 hisi_hba->last_dev_id = i;
685 spin_unlock(lock: &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(lock: &cq->poll_lock);
694 spin_unlock(lock: &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(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(dev: device, lun: 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(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(type: parent_dev->dev_type)) {
848 int phy_no;
849
850 phy_no = sas_find_attached_phy_id(ex_dev: &parent_dev->ex_dev, 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, new_depth: 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(ha: 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, event: 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, func: 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, event: 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(wq: hisi_hba->wq, work: &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(lock: &phy->lock, flags);
988 return;
989 }
990
991 if (!timer_pending(timer: &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(timer: &phy->timer);
997 spin_unlock_irqrestore(lock: &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(lock: &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(lock: &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(lock: &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(lock: &sas_dev->lock);
1108 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1109 hisi_sas_do_release_task(hisi_hba, task: slot->task, slot, need_lock: false);
1110
1111 spin_unlock(lock: &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, src2p: mask))
1154 continue;
1155 rc = sas_execute_internal_abort_dev(device, qid: i, data: &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(sem: &hisi_hba->sem);
1174 if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1175 hisi_sas_internal_task_abort_dev(sas_dev, rst_ha_timeout: 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(sem: &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(msecs: 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(sem: &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(msecs: 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, r: 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(x: &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(sem: &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: &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: &tf, pmp, is_cmd: 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(dev: link->device, reset: 1, pmp, fis);
1317 rc = sas_execute_ata_cmd(device, fis, force_phy_id: -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(dev: link->device, reset: 0, pmp, fis);
1327 rc = sas_execute_ata_cmd(device, fis, force_phy_id: -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(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(lock: &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(type: dev->dev_type))
1406 sas_notify_port_event(phy: sas_phy,
1407 event: PORTE_BROADCAST_RCVD,
1408 GFP_KERNEL);
1409 }
1410 } else {
1411 hisi_sas_phy_down(hisi_hba, phy_no, rdy: 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(dev: link->device, reset: 1, pmp, fis);
1452 rc = sas_execute_ata_cmd(device, fis, force_phy_id: 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, rst_ha_timeout: 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(type: 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(dev: 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(timer: &hisi_hba->timer);
1516
1517 set_bit(HISI_SAS_REJECT_CMD_BIT, addr: &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(x: &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(func: hisi_sas_async_init_wait_phyup,
1552 data: phy, domain: &async);
1553 }
1554
1555 async_synchronize_full_domain(domain: &async);
1556 hisi_sas_refresh_port_id(hisi_hba);
1557 clear_bit(HISI_SAS_REJECT_CMD_BIT, addr: &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, addr: &hisi_hba->flags);
1564 up(sem: &hisi_hba->sem);
1565
1566 hisi_sas_rescan_topology(hisi_hba, state: 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(sem: &hisi_hba->sem);
1576 if (test_and_set_bit(HISI_SAS_RESETTING_BIT, addr: &hisi_hba->flags)) {
1577 up(sem: &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, addr: &hisi_hba->flags);
1600 up(sem: &hisi_hba->sem);
1601 scsi_unblock_requests(shost);
1602 clear_bit(HISI_SAS_RESETTING_BIT, addr: &hisi_hba->flags);
1603 return rc;
1604 }
1605 clear_bit(HISI_SAS_HW_FAULT_BIT, addr: &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(device: 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(lock: &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(lock: &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 qid: slot->dlvry_queue, data: &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, need_lock: 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, rst_ha_timeout: 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, need_lock: 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, qid: slot->dlvry_queue,
1706 data: &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, rst_ha_timeout: 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(dev: 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(dev: 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(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(lock: &phy->lock, flags);
1768 }
1769
1770 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1771 !dev_is_sata(dev: device)) ? true : false;
1772
1773 rc = sas_phy_reset(phy: local_phy, hard_reset: reset_type);
1774 sas_put_local_phy(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(lock: &phy->lock, flags);
1786
1787 /* report PHY down if timed out */
1788 if (rc == -ETIMEDOUT)
1789 hisi_sas_phy_down(hisi_hba, phy_no: sas_phy->id, rdy: 0, GFP_KERNEL);
1790 return rc;
1791 }
1792
1793 /* Remote phy */
1794 if (rc)
1795 return rc;
1796
1797 if (dev_is_sata(dev: device)) {
1798 struct ata_link *link = &device->sata_dev.ap->link;
1799
1800 rc = ata_wait_after_reset(link, deadline: jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT,
1801 check_ready: smp_ata_check_ready_type);
1802 } else {
1803 msleep(msecs: 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, rst_ha_timeout: 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(dev: 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(dev: device);
1839 rc = sas_phy_enable(phy: local_phy, enable: 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(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, rst_ha_timeout: 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(dev: device)) {
1875 struct sas_phy *phy;
1876
1877 phy = sas_get_local_phy(dev: device);
1878
1879 rc = sas_phy_reset(phy, hard_reset: 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(dev: 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(wq: hisi_hba->wq, work: &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(type: device->dev_type))
1926 continue;
1927
1928 async_schedule_domain(func: hisi_sas_async_I_T_nexus_reset,
1929 data: device, domain: &async);
1930 }
1931
1932 async_synchronize_full_domain(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(sem: &hisi_hba->sem);
1978 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1979 if (!timeout->rst_ha_timeout)
1980 up(sem: &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, addr: &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(wq: hisi_hba->wq, work: &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(lock: &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(phy: sas_phy, event: PHYE_LOSS_OF_SIGNAL, gfp_flags);
2073 sas_phy_disconnected(phy: 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(phy: sas_phy, event: 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(wq: hisi_hba->wq, work: &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(sem: &hisi_hba->sem, val: 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, phy_no: 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(list: &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, size: s,
2210 dma_handle: &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, size: s,
2218 dma_handle: &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, size: s, dma_handle: &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, n: max_command_entries,
2231 size: 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, size: s, dma_handle: &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, size: s, dma_handle: &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, size: s,
2278 dma_handle: &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, nbits: 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, size: s,
2290 dma_handle: &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, size: s,
2297 dma_handle: &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(timer: &phy->timer);
2324 }
2325
2326 if (hisi_hba->wq)
2327 destroy_workqueue(wq: 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(hisi_hba: rst->hisi_hba))
2349 goto rst_complete;
2350
2351 if (!hisi_sas_controller_reset(hisi_hba: 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, propname: "sas-addr", val: 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 property: "hisilicon,sas-syscon");
2378 if (IS_ERR(ptr: hisi_hba->ctrl)) {
2379 dev_err(dev, "could not get syscon\n");
2380 return -ENOENT;
2381 }
2382
2383 if (device_property_read_u32(dev, propname: "ctrl-reset-reg",
2384 val: &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, propname: "ctrl-reset-sts-reg",
2390 val: &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, propname: "ctrl-clock-ena-reg",
2396 val: &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(ptr: refclk))
2404 dev_dbg(dev, "no ref clk property\n");
2405 else
2406 hisi_hba->refclk_frequency_mhz = clk_get_rate(clk: refclk) / 1000000;
2407
2408 if (device_property_read_u32(dev, propname: "phy-count", val: &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, propname: "queue-count",
2414 val: &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, index: 0);
2458 if (IS_ERR(ptr: 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(ptr: 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(t: 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, data: sha);
2505
2506 phy_nr = port_nr = hisi_hba->n_phy;
2507
2508 arr_phy = devm_kcalloc(dev, n: phy_nr, size: sizeof(void *), GFP_KERNEL);
2509 arr_port = devm_kcalloc(dev, n: port_nr, size: 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(host: shost, dev: &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(t: 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(timer: &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(t: 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(name: "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(dentry: 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

source code of linux/drivers/scsi/hisi_sas/hisi_sas_main.c