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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
blob9a6deb21fe4dfcf71688ccb72b118693bc387b76
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2015 Linaro Ltd.
4 * Copyright (c) 2015 Hisilicon Limited.
5 */
6
7 #include "hisi_sas.h"
8 #define DRV_NAME "hisi_sas"
9
10 #define DEV_IS_GONE(dev) \
11 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
12
13 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
14 u8 *lun, struct hisi_sas_tmf_task *tmf);
15 static int
16 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
17 struct domain_device *device,
18 int abort_flag, int tag);
19 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
20 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
21 void *funcdata);
22 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
23 struct domain_device *device);
24 static void hisi_sas_dev_gone(struct domain_device *device);
25
26 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
27 {
28 switch (fis->command) {
29 case ATA_CMD_FPDMA_WRITE:
30 case ATA_CMD_FPDMA_READ:
31 case ATA_CMD_FPDMA_RECV:
32 case ATA_CMD_FPDMA_SEND:
33 case ATA_CMD_NCQ_NON_DATA:
34 return HISI_SAS_SATA_PROTOCOL_FPDMA;
35
36 case ATA_CMD_DOWNLOAD_MICRO:
37 case ATA_CMD_ID_ATA:
38 case ATA_CMD_PMP_READ:
39 case ATA_CMD_READ_LOG_EXT:
40 case ATA_CMD_PIO_READ:
41 case ATA_CMD_PIO_READ_EXT:
42 case ATA_CMD_PMP_WRITE:
43 case ATA_CMD_WRITE_LOG_EXT:
44 case ATA_CMD_PIO_WRITE:
45 case ATA_CMD_PIO_WRITE_EXT:
46 return HISI_SAS_SATA_PROTOCOL_PIO;
47
48 case ATA_CMD_DSM:
49 case ATA_CMD_DOWNLOAD_MICRO_DMA:
50 case ATA_CMD_PMP_READ_DMA:
51 case ATA_CMD_PMP_WRITE_DMA:
52 case ATA_CMD_READ:
53 case ATA_CMD_READ_EXT:
54 case ATA_CMD_READ_LOG_DMA_EXT:
55 case ATA_CMD_READ_STREAM_DMA_EXT:
56 case ATA_CMD_TRUSTED_RCV_DMA:
57 case ATA_CMD_TRUSTED_SND_DMA:
58 case ATA_CMD_WRITE:
59 case ATA_CMD_WRITE_EXT:
60 case ATA_CMD_WRITE_FUA_EXT:
61 case ATA_CMD_WRITE_QUEUED:
62 case ATA_CMD_WRITE_LOG_DMA_EXT:
63 case ATA_CMD_WRITE_STREAM_DMA_EXT:
64 case ATA_CMD_ZAC_MGMT_IN:
65 return HISI_SAS_SATA_PROTOCOL_DMA;
66
67 case ATA_CMD_CHK_POWER:
68 case ATA_CMD_DEV_RESET:
69 case ATA_CMD_EDD:
70 case ATA_CMD_FLUSH:
71 case ATA_CMD_FLUSH_EXT:
72 case ATA_CMD_VERIFY:
73 case ATA_CMD_VERIFY_EXT:
74 case ATA_CMD_SET_FEATURES:
75 case ATA_CMD_STANDBY:
76 case ATA_CMD_STANDBYNOW1:
77 case ATA_CMD_ZAC_MGMT_OUT:
78 return HISI_SAS_SATA_PROTOCOL_NONDATA;
79
80 case ATA_CMD_SET_MAX:
81 switch (fis->features) {
82 case ATA_SET_MAX_PASSWD:
83 case ATA_SET_MAX_LOCK:
84 return HISI_SAS_SATA_PROTOCOL_PIO;
85
86 case ATA_SET_MAX_PASSWD_DMA:
87 case ATA_SET_MAX_UNLOCK_DMA:
88 return HISI_SAS_SATA_PROTOCOL_DMA;
89
90 default:
91 return HISI_SAS_SATA_PROTOCOL_NONDATA;
92 }
93
94 default:
95 {
96 if (direction == DMA_NONE)
97 return HISI_SAS_SATA_PROTOCOL_NONDATA;
98 return HISI_SAS_SATA_PROTOCOL_PIO;
99 }
100 }
101 }
102 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
103
104 void hisi_sas_sata_done(struct sas_task *task,
105 struct hisi_sas_slot *slot)
106 {
107 struct task_status_struct *ts = &task->task_status;
108 struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
109 struct hisi_sas_status_buffer *status_buf =
110 hisi_sas_status_buf_addr_mem(slot);
111 u8 *iu = &status_buf->iu[0];
112 struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu;
113
114 resp->frame_len = sizeof(struct dev_to_host_fis);
115 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
116
117 ts->buf_valid_size = sizeof(*resp);
118 }
119 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
120
121 /*
122 * This function assumes linkrate mask fits in 8 bits, which it
123 * does for all HW versions supported.
124 */
125 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
126 {
127 u8 rate = 0;
128 int i;
129
130 max -= SAS_LINK_RATE_1_5_GBPS;
131 for (i = 0; i <= max; i++)
132 rate |= 1 << (i * 2);
133 return rate;
134 }
135 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
136
137 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
138 {
139 return device->port->ha->lldd_ha;
140 }
141
142 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
143 {
144 return container_of(sas_port, struct hisi_sas_port, sas_port);
145 }
146 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
147
148 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
149 {
150 int phy_no;
151
152 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
153 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
154 }
155 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
156
157 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
158 {
159 void *bitmap = hisi_hba->slot_index_tags;
160
161 clear_bit(slot_idx, bitmap);
162 }
163
164 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
165 {
166 if (hisi_hba->hw->slot_index_alloc ||
167 slot_idx >= HISI_SAS_UNRESERVED_IPTT) {
168 spin_lock(&hisi_hba->lock);
169 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
170 spin_unlock(&hisi_hba->lock);
171 }
172 }
173
174 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
175 {
176 void *bitmap = hisi_hba->slot_index_tags;
177
178 set_bit(slot_idx, bitmap);
179 }
180
181 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
182 struct scsi_cmnd *scsi_cmnd)
183 {
184 int index;
185 void *bitmap = hisi_hba->slot_index_tags;
186
187 if (scsi_cmnd)
188 return scsi_cmnd->request->tag;
189
190 spin_lock(&hisi_hba->lock);
191 index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
192 hisi_hba->last_slot_index + 1);
193 if (index >= hisi_hba->slot_index_count) {
194 index = find_next_zero_bit(bitmap,
195 hisi_hba->slot_index_count,
196 HISI_SAS_UNRESERVED_IPTT);
197 if (index >= hisi_hba->slot_index_count) {
198 spin_unlock(&hisi_hba->lock);
199 return -SAS_QUEUE_FULL;
200 }
201 }
202 hisi_sas_slot_index_set(hisi_hba, index);
203 hisi_hba->last_slot_index = index;
204 spin_unlock(&hisi_hba->lock);
205
206 return index;
207 }
208
209 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
210 {
211 int i;
212
213 for (i = 0; i < hisi_hba->slot_index_count; ++i)
214 hisi_sas_slot_index_clear(hisi_hba, i);
215 }
216
217 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
218 struct hisi_sas_slot *slot)
219 {
220 int device_id = slot->device_id;
221 struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
222
223 if (task) {
224 struct device *dev = hisi_hba->dev;
225
226 if (!task->lldd_task)
227 return;
228
229 task->lldd_task = NULL;
230
231 if (!sas_protocol_ata(task->task_proto)) {
232 struct sas_ssp_task *ssp_task = &task->ssp_task;
233 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
234
235 if (slot->n_elem)
236 dma_unmap_sg(dev, task->scatter,
237 task->num_scatter,
238 task->data_dir);
239 if (slot->n_elem_dif)
240 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
241 scsi_prot_sg_count(scsi_cmnd),
242 task->data_dir);
243 }
244 }
245
246 spin_lock(&sas_dev->lock);
247 list_del_init(&slot->entry);
248 spin_unlock(&sas_dev->lock);
249
250 memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
251
252 hisi_sas_slot_index_free(hisi_hba, slot->idx);
253 }
254 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
255
256 static 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
262 static 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
268 static 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
274 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
275 struct hisi_sas_slot *slot,
276 int device_id, int abort_flag, int tag_to_abort)
277 {
278 hisi_hba->hw->prep_abort(hisi_hba, slot,
279 device_id, abort_flag, tag_to_abort);
280 }
281
282 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
283 struct sas_task *task, int n_elem,
284 int n_elem_req)
285 {
286 struct device *dev = hisi_hba->dev;
287
288 if (!sas_protocol_ata(task->task_proto)) {
289 if (task->num_scatter) {
290 if (n_elem)
291 dma_unmap_sg(dev, task->scatter,
292 task->num_scatter,
293 task->data_dir);
294 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
295 if (n_elem_req)
296 dma_unmap_sg(dev, &task->smp_task.smp_req,
297 1, DMA_TO_DEVICE);
298 }
299 }
300 }
301
302 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
303 struct sas_task *task, int *n_elem,
304 int *n_elem_req)
305 {
306 struct device *dev = hisi_hba->dev;
307 int rc;
308
309 if (sas_protocol_ata(task->task_proto)) {
310 *n_elem = task->num_scatter;
311 } else {
312 unsigned int req_len;
313
314 if (task->num_scatter) {
315 *n_elem = dma_map_sg(dev, task->scatter,
316 task->num_scatter, task->data_dir);
317 if (!*n_elem) {
318 rc = -ENOMEM;
319 goto prep_out;
320 }
321 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
322 *n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
323 1, DMA_TO_DEVICE);
324 if (!*n_elem_req) {
325 rc = -ENOMEM;
326 goto prep_out;
327 }
328 req_len = sg_dma_len(&task->smp_task.smp_req);
329 if (req_len & 0x3) {
330 rc = -EINVAL;
331 goto err_out_dma_unmap;
332 }
333 }
334 }
335
336 if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
337 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT",
338 *n_elem);
339 rc = -EINVAL;
340 goto err_out_dma_unmap;
341 }
342 return 0;
343
344 err_out_dma_unmap:
345 /* It would be better to call dma_unmap_sg() here, but it's messy */
346 hisi_sas_dma_unmap(hisi_hba, task, *n_elem,
347 *n_elem_req);
348 prep_out:
349 return rc;
350 }
351
352 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
353 struct sas_task *task, int n_elem_dif)
354 {
355 struct device *dev = hisi_hba->dev;
356
357 if (n_elem_dif) {
358 struct sas_ssp_task *ssp_task = &task->ssp_task;
359 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
360
361 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
362 scsi_prot_sg_count(scsi_cmnd),
363 task->data_dir);
364 }
365 }
366
367 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
368 int *n_elem_dif, struct sas_task *task)
369 {
370 struct device *dev = hisi_hba->dev;
371 struct sas_ssp_task *ssp_task;
372 struct scsi_cmnd *scsi_cmnd;
373 int rc;
374
375 if (task->num_scatter) {
376 ssp_task = &task->ssp_task;
377 scsi_cmnd = ssp_task->cmd;
378
379 if (scsi_prot_sg_count(scsi_cmnd)) {
380 *n_elem_dif = dma_map_sg(dev,
381 scsi_prot_sglist(scsi_cmnd),
382 scsi_prot_sg_count(scsi_cmnd),
383 task->data_dir);
384
385 if (!*n_elem_dif)
386 return -ENOMEM;
387
388 if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
389 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
390 *n_elem_dif);
391 rc = -EINVAL;
392 goto err_out_dif_dma_unmap;
393 }
394 }
395 }
396
397 return 0;
398
399 err_out_dif_dma_unmap:
400 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
401 scsi_prot_sg_count(scsi_cmnd), task->data_dir);
402 return rc;
403 }
404
405 static int hisi_sas_task_prep(struct sas_task *task,
406 struct hisi_sas_dq **dq_pointer,
407 bool is_tmf, struct hisi_sas_tmf_task *tmf,
408 int *pass)
409 {
410 struct domain_device *device = task->dev;
411 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
412 struct hisi_sas_device *sas_dev = device->lldd_dev;
413 struct hisi_sas_port *port;
414 struct hisi_sas_slot *slot;
415 struct hisi_sas_cmd_hdr *cmd_hdr_base;
416 struct asd_sas_port *sas_port = device->port;
417 struct device *dev = hisi_hba->dev;
418 int dlvry_queue_slot, dlvry_queue, rc, slot_idx;
419 int n_elem = 0, n_elem_dif = 0, n_elem_req = 0;
420 struct hisi_sas_dq *dq;
421 unsigned long flags;
422 int wr_q_index;
423
424 if (DEV_IS_GONE(sas_dev)) {
425 if (sas_dev)
426 dev_info(dev, "task prep: device %d not ready\n",
427 sas_dev->device_id);
428 else
429 dev_info(dev, "task prep: device %016llx not ready\n",
430 SAS_ADDR(device->sas_addr));
431
432 return -ECOMM;
433 }
434
435 if (hisi_hba->reply_map) {
436 int cpu = raw_smp_processor_id();
437 unsigned int dq_index = hisi_hba->reply_map[cpu];
438
439 *dq_pointer = dq = &hisi_hba->dq[dq_index];
440 } else {
441 *dq_pointer = dq = sas_dev->dq;
442 }
443
444 port = to_hisi_sas_port(sas_port);
445 if (port && !port->port_attached) {
446 dev_info(dev, "task prep: %s port%d not attach device\n",
447 (dev_is_sata(device)) ?
448 "SATA/STP" : "SAS",
449 device->port->id);
450
451 return -ECOMM;
452 }
453
454 rc = hisi_sas_dma_map(hisi_hba, task, &n_elem,
455 &n_elem_req);
456 if (rc < 0)
457 goto prep_out;
458
459 if (!sas_protocol_ata(task->task_proto)) {
460 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
461 if (rc < 0)
462 goto err_out_dma_unmap;
463 }
464
465 if (hisi_hba->hw->slot_index_alloc)
466 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
467 else {
468 struct scsi_cmnd *scsi_cmnd = NULL;
469
470 if (task->uldd_task) {
471 struct ata_queued_cmd *qc;
472
473 if (dev_is_sata(device)) {
474 qc = task->uldd_task;
475 scsi_cmnd = qc->scsicmd;
476 } else {
477 scsi_cmnd = task->uldd_task;
478 }
479 }
480 rc = hisi_sas_slot_index_alloc(hisi_hba, scsi_cmnd);
481 }
482 if (rc < 0)
483 goto err_out_dif_dma_unmap;
484
485 slot_idx = rc;
486 slot = &hisi_hba->slot_info[slot_idx];
487
488 spin_lock(&dq->lock);
489 wr_q_index = dq->wr_point;
490 dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
491 list_add_tail(&slot->delivery, &dq->list);
492 spin_unlock(&dq->lock);
493 spin_lock(&sas_dev->lock);
494 list_add_tail(&slot->entry, &sas_dev->list);
495 spin_unlock(&sas_dev->lock);
496
497 dlvry_queue = dq->id;
498 dlvry_queue_slot = wr_q_index;
499
500 slot->device_id = sas_dev->device_id;
501 slot->n_elem = n_elem;
502 slot->n_elem_dif = n_elem_dif;
503 slot->dlvry_queue = dlvry_queue;
504 slot->dlvry_queue_slot = dlvry_queue_slot;
505 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
506 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
507 slot->task = task;
508 slot->port = port;
509 slot->tmf = tmf;
510 slot->is_internal = is_tmf;
511 task->lldd_task = slot;
512
513 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
514 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
515 memset(hisi_sas_status_buf_addr_mem(slot), 0,
516 sizeof(struct hisi_sas_err_record));
517
518 switch (task->task_proto) {
519 case SAS_PROTOCOL_SMP:
520 hisi_sas_task_prep_smp(hisi_hba, slot);
521 break;
522 case SAS_PROTOCOL_SSP:
523 hisi_sas_task_prep_ssp(hisi_hba, slot);
524 break;
525 case SAS_PROTOCOL_SATA:
526 case SAS_PROTOCOL_STP:
527 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
528 hisi_sas_task_prep_ata(hisi_hba, slot);
529 break;
530 default:
531 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
532 task->task_proto);
533 break;
534 }
535
536 spin_lock_irqsave(&task->task_state_lock, flags);
537 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
538 spin_unlock_irqrestore(&task->task_state_lock, flags);
539
540 ++(*pass);
541 WRITE_ONCE(slot->ready, 1);
542
543 return 0;
544
545 err_out_dif_dma_unmap:
546 if (!sas_protocol_ata(task->task_proto))
547 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
548 err_out_dma_unmap:
549 hisi_sas_dma_unmap(hisi_hba, task, n_elem,
550 n_elem_req);
551 prep_out:
552 dev_err(dev, "task prep: failed[%d]!\n", rc);
553 return rc;
554 }
555
556 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
557 bool is_tmf, struct hisi_sas_tmf_task *tmf)
558 {
559 u32 rc;
560 u32 pass = 0;
561 struct hisi_hba *hisi_hba;
562 struct device *dev;
563 struct domain_device *device = task->dev;
564 struct asd_sas_port *sas_port = device->port;
565 struct hisi_sas_dq *dq = NULL;
566
567 if (!sas_port) {
568 struct task_status_struct *ts = &task->task_status;
569
570 ts->resp = SAS_TASK_UNDELIVERED;
571 ts->stat = SAS_PHY_DOWN;
572 /*
573 * libsas will use dev->port, should
574 * not call task_done for sata
575 */
576 if (device->dev_type != SAS_SATA_DEV)
577 task->task_done(task);
578 return -ECOMM;
579 }
580
581 hisi_hba = dev_to_hisi_hba(device);
582 dev = hisi_hba->dev;
583
584 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
585 /*
586 * For IOs from upper layer, it may already disable preempt
587 * in the IO path, if disable preempt again in down(),
588 * function schedule() will report schedule_bug(), so check
589 * preemptible() before goto down().
590 */
591 if (!preemptible())
592 return -EINVAL;
593
594 down(&hisi_hba->sem);
595 up(&hisi_hba->sem);
596 }
597
598 /* protect task_prep and start_delivery sequence */
599 rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf, &pass);
600 if (rc)
601 dev_err(dev, "task exec: failed[%d]!\n", rc);
602
603 if (likely(pass)) {
604 spin_lock(&dq->lock);
605 hisi_hba->hw->start_delivery(dq);
606 spin_unlock(&dq->lock);
607 }
608
609 return rc;
610 }
611
612 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
613 {
614 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
615 struct asd_sas_phy *sas_phy = &phy->sas_phy;
616 struct sas_ha_struct *sas_ha;
617
618 if (!phy->phy_attached)
619 return;
620
621 sas_ha = &hisi_hba->sha;
622 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
623
624 if (sas_phy->phy) {
625 struct sas_phy *sphy = sas_phy->phy;
626
627 sphy->negotiated_linkrate = sas_phy->linkrate;
628 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
629 sphy->maximum_linkrate_hw =
630 hisi_hba->hw->phy_get_max_linkrate();
631 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
632 sphy->minimum_linkrate = phy->minimum_linkrate;
633
634 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
635 sphy->maximum_linkrate = phy->maximum_linkrate;
636 }
637
638 if (phy->phy_type & PORT_TYPE_SAS) {
639 struct sas_identify_frame *id;
640
641 id = (struct sas_identify_frame *)phy->frame_rcvd;
642 id->dev_type = phy->identify.device_type;
643 id->initiator_bits = SAS_PROTOCOL_ALL;
644 id->target_bits = phy->identify.target_port_protocols;
645 } else if (phy->phy_type & PORT_TYPE_SATA) {
646 /* Nothing */
647 }
648
649 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
650 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
651 }
652
653 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
654 {
655 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
656 struct hisi_sas_device *sas_dev = NULL;
657 int last = hisi_hba->last_dev_id;
658 int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
659 int i;
660
661 spin_lock(&hisi_hba->lock);
662 for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
663 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
664 int queue = i % hisi_hba->queue_count;
665 struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
666
667 hisi_hba->devices[i].device_id = i;
668 sas_dev = &hisi_hba->devices[i];
669 sas_dev->dev_status = HISI_SAS_DEV_INIT;
670 sas_dev->dev_type = device->dev_type;
671 sas_dev->hisi_hba = hisi_hba;
672 sas_dev->sas_device = device;
673 sas_dev->dq = dq;
674 spin_lock_init(&sas_dev->lock);
675 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
676 break;
677 }
678 i++;
679 }
680 hisi_hba->last_dev_id = i;
681 spin_unlock(&hisi_hba->lock);
682
683 return sas_dev;
684 }
685
686 #define HISI_SAS_DISK_RECOVER_CNT 3
687 static int hisi_sas_init_device(struct domain_device *device)
688 {
689 int rc = TMF_RESP_FUNC_COMPLETE;
690 struct scsi_lun lun;
691 struct hisi_sas_tmf_task tmf_task;
692 int retry = HISI_SAS_DISK_RECOVER_CNT;
693 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
694 struct device *dev = hisi_hba->dev;
695 struct sas_phy *local_phy;
696
697 switch (device->dev_type) {
698 case SAS_END_DEVICE:
699 int_to_scsilun(0, &lun);
700
701 tmf_task.tmf = TMF_CLEAR_TASK_SET;
702 while (retry-- > 0) {
703 rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
704 &tmf_task);
705 if (rc == TMF_RESP_FUNC_COMPLETE) {
706 hisi_sas_release_task(hisi_hba, device);
707 break;
708 }
709 }
710 break;
711 case SAS_SATA_DEV:
712 case SAS_SATA_PM:
713 case SAS_SATA_PM_PORT:
714 case SAS_SATA_PENDING:
715 /*
716 * send HARD RESET to clear previous affiliation of
717 * STP target port
718 */
719 local_phy = sas_get_local_phy(device);
720 if (!scsi_is_sas_phy_local(local_phy) &&
721 !test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
722 unsigned long deadline = ata_deadline(jiffies, 20000);
723 struct sata_device *sata_dev = &device->sata_dev;
724 struct ata_host *ata_host = sata_dev->ata_host;
725 struct ata_port_operations *ops = ata_host->ops;
726 struct ata_port *ap = sata_dev->ap;
727 struct ata_link *link;
728 unsigned int classes;
729
730 ata_for_each_link(link, ap, EDGE)
731 rc = ops->hardreset(link, &classes,
732 deadline);
733 }
734 sas_put_local_phy(local_phy);
735 if (rc) {
736 dev_warn(dev, "SATA disk hardreset fail: %d\n", rc);
737 return rc;
738 }
739
740 while (retry-- > 0) {
741 rc = hisi_sas_softreset_ata_disk(device);
742 if (!rc)
743 break;
744 }
745 break;
746 default:
747 break;
748 }
749
750 return rc;
751 }
752
753 static int hisi_sas_dev_found(struct domain_device *device)
754 {
755 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
756 struct domain_device *parent_dev = device->parent;
757 struct hisi_sas_device *sas_dev;
758 struct device *dev = hisi_hba->dev;
759 int rc;
760
761 if (hisi_hba->hw->alloc_dev)
762 sas_dev = hisi_hba->hw->alloc_dev(device);
763 else
764 sas_dev = hisi_sas_alloc_dev(device);
765 if (!sas_dev) {
766 dev_err(dev, "fail alloc dev: max support %d devices\n",
767 HISI_SAS_MAX_DEVICES);
768 return -EINVAL;
769 }
770
771 device->lldd_dev = sas_dev;
772 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
773
774 if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
775 int phy_no;
776 u8 phy_num = parent_dev->ex_dev.num_phys;
777 struct ex_phy *phy;
778
779 for (phy_no = 0; phy_no < phy_num; phy_no++) {
780 phy = &parent_dev->ex_dev.ex_phy[phy_no];
781 if (SAS_ADDR(phy->attached_sas_addr) ==
782 SAS_ADDR(device->sas_addr))
783 break;
784 }
785
786 if (phy_no == phy_num) {
787 dev_info(dev, "dev found: no attached "
788 "dev:%016llx at ex:%016llx\n",
789 SAS_ADDR(device->sas_addr),
790 SAS_ADDR(parent_dev->sas_addr));
791 rc = -EINVAL;
792 goto err_out;
793 }
794 }
795
796 dev_info(dev, "dev[%d:%x] found\n",
797 sas_dev->device_id, sas_dev->dev_type);
798
799 rc = hisi_sas_init_device(device);
800 if (rc)
801 goto err_out;
802 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
803 return 0;
804
805 err_out:
806 hisi_sas_dev_gone(device);
807 return rc;
808 }
809
810 int hisi_sas_slave_configure(struct scsi_device *sdev)
811 {
812 struct domain_device *dev = sdev_to_domain_dev(sdev);
813 int ret = sas_slave_configure(sdev);
814
815 if (ret)
816 return ret;
817 if (!dev_is_sata(dev))
818 sas_change_queue_depth(sdev, 64);
819
820 return 0;
821 }
822 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
823
824 void hisi_sas_scan_start(struct Scsi_Host *shost)
825 {
826 struct hisi_hba *hisi_hba = shost_priv(shost);
827
828 hisi_hba->hw->phys_init(hisi_hba);
829 }
830 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
831
832 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
833 {
834 struct hisi_hba *hisi_hba = shost_priv(shost);
835 struct sas_ha_struct *sha = &hisi_hba->sha;
836
837 /* Wait for PHY up interrupt to occur */
838 if (time < HZ)
839 return 0;
840
841 sas_drain_work(sha);
842 return 1;
843 }
844 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
845
846 static void hisi_sas_phyup_work(struct work_struct *work)
847 {
848 struct hisi_sas_phy *phy =
849 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
850 struct hisi_hba *hisi_hba = phy->hisi_hba;
851 struct asd_sas_phy *sas_phy = &phy->sas_phy;
852 int phy_no = sas_phy->id;
853
854 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
855 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
856 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
857 }
858
859 static void hisi_sas_linkreset_work(struct work_struct *work)
860 {
861 struct hisi_sas_phy *phy =
862 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
863 struct asd_sas_phy *sas_phy = &phy->sas_phy;
864
865 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
866 }
867
868 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
869 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
870 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
871 };
872
873 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
874 enum hisi_sas_phy_event event)
875 {
876 struct hisi_hba *hisi_hba = phy->hisi_hba;
877
878 if (WARN_ON(event >= HISI_PHYES_NUM))
879 return false;
880
881 return queue_work(hisi_hba->wq, &phy->works[event]);
882 }
883 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
884
885 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
886 {
887 struct hisi_sas_phy *phy = from_timer(phy, t, timer);
888 struct hisi_hba *hisi_hba = phy->hisi_hba;
889 struct device *dev = hisi_hba->dev;
890 int phy_no = phy->sas_phy.id;
891
892 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
893 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
894 }
895
896 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
897 {
898 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
899 struct device *dev = hisi_hba->dev;
900
901 if (!timer_pending(&phy->timer)) {
902 dev_dbg(dev, "phy%d OOB ready\n", phy_no);
903 phy->timer.expires = jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT * HZ;
904 add_timer(&phy->timer);
905 }
906 }
907 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
908
909 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
910 {
911 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
912 struct asd_sas_phy *sas_phy = &phy->sas_phy;
913 int i;
914
915 phy->hisi_hba = hisi_hba;
916 phy->port = NULL;
917 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
918 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
919 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
920 sas_phy->class = SAS;
921 sas_phy->iproto = SAS_PROTOCOL_ALL;
922 sas_phy->tproto = 0;
923 sas_phy->type = PHY_TYPE_PHYSICAL;
924 sas_phy->role = PHY_ROLE_INITIATOR;
925 sas_phy->oob_mode = OOB_NOT_CONNECTED;
926 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
927 sas_phy->id = phy_no;
928 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
929 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
930 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
931 sas_phy->lldd_phy = phy;
932
933 for (i = 0; i < HISI_PHYES_NUM; i++)
934 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
935
936 spin_lock_init(&phy->lock);
937
938 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
939 }
940
941 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
942 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
943 {
944 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
945 struct asd_sas_phy *aphy = &phy->sas_phy;
946 struct sas_phy *sphy = aphy->phy;
947 unsigned long flags;
948
949 spin_lock_irqsave(&phy->lock, flags);
950
951 if (enable) {
952 /* We may have been enabled already; if so, don't touch */
953 if (!phy->enable)
954 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
955 hisi_hba->hw->phy_start(hisi_hba, phy_no);
956 } else {
957 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
958 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
959 }
960 phy->enable = enable;
961 spin_unlock_irqrestore(&phy->lock, flags);
962 }
963 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
964
965 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
966 {
967 struct sas_ha_struct *sas_ha = sas_phy->ha;
968 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
969 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
970 struct asd_sas_port *sas_port = sas_phy->port;
971 struct hisi_sas_port *port;
972 unsigned long flags;
973
974 if (!sas_port)
975 return;
976
977 port = to_hisi_sas_port(sas_port);
978 spin_lock_irqsave(&hisi_hba->lock, flags);
979 port->port_attached = 1;
980 port->id = phy->port_id;
981 phy->port = port;
982 sas_port->lldd_port = port;
983 spin_unlock_irqrestore(&hisi_hba->lock, flags);
984 }
985
986 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
987 struct hisi_sas_slot *slot)
988 {
989 if (task) {
990 unsigned long flags;
991 struct task_status_struct *ts;
992
993 ts = &task->task_status;
994
995 ts->resp = SAS_TASK_COMPLETE;
996 ts->stat = SAS_ABORTED_TASK;
997 spin_lock_irqsave(&task->task_state_lock, flags);
998 task->task_state_flags &=
999 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1000 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1001 task->task_state_flags |= SAS_TASK_STATE_DONE;
1002 spin_unlock_irqrestore(&task->task_state_lock, flags);
1003 }
1004
1005 hisi_sas_slot_task_free(hisi_hba, task, slot);
1006 }
1007
1008 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1009 struct domain_device *device)
1010 {
1011 struct hisi_sas_slot *slot, *slot2;
1012 struct hisi_sas_device *sas_dev = device->lldd_dev;
1013
1014 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1015 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
1016 }
1017
1018 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1019 {
1020 struct hisi_sas_device *sas_dev;
1021 struct domain_device *device;
1022 int i;
1023
1024 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1025 sas_dev = &hisi_hba->devices[i];
1026 device = sas_dev->sas_device;
1027
1028 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1029 !device)
1030 continue;
1031
1032 hisi_sas_release_task(hisi_hba, device);
1033 }
1034 }
1035 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1036
1037 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1038 struct domain_device *device)
1039 {
1040 if (hisi_hba->hw->dereg_device)
1041 hisi_hba->hw->dereg_device(hisi_hba, device);
1042 }
1043
1044 static void hisi_sas_dev_gone(struct domain_device *device)
1045 {
1046 struct hisi_sas_device *sas_dev = device->lldd_dev;
1047 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1048 struct device *dev = hisi_hba->dev;
1049 int ret = 0;
1050
1051 dev_info(dev, "dev[%d:%x] is gone\n",
1052 sas_dev->device_id, sas_dev->dev_type);
1053
1054 down(&hisi_hba->sem);
1055 if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
1056 hisi_sas_internal_task_abort(hisi_hba, device,
1057 HISI_SAS_INT_ABT_DEV, 0);
1058
1059 hisi_sas_dereg_device(hisi_hba, device);
1060
1061 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1062 device->lldd_dev = NULL;
1063 }
1064
1065 if (hisi_hba->hw->free_device)
1066 hisi_hba->hw->free_device(sas_dev);
1067
1068 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1069 if (!ret)
1070 sas_dev->dev_type = SAS_PHY_UNUSED;
1071 sas_dev->sas_device = NULL;
1072 up(&hisi_hba->sem);
1073 }
1074
1075 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
1076 {
1077 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
1078 }
1079
1080 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1081 struct sas_phy_linkrates *r)
1082 {
1083 struct sas_phy_linkrates _r;
1084
1085 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1086 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1087 enum sas_linkrate min, max;
1088
1089 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1090 return -EINVAL;
1091
1092 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1093 max = sas_phy->phy->maximum_linkrate;
1094 min = r->minimum_linkrate;
1095 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1096 max = r->maximum_linkrate;
1097 min = sas_phy->phy->minimum_linkrate;
1098 } else
1099 return -EINVAL;
1100
1101 _r.maximum_linkrate = max;
1102 _r.minimum_linkrate = min;
1103
1104 sas_phy->phy->maximum_linkrate = max;
1105 sas_phy->phy->minimum_linkrate = min;
1106
1107 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1108 msleep(100);
1109 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1110 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1111
1112 return 0;
1113 }
1114
1115 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1116 void *funcdata)
1117 {
1118 struct sas_ha_struct *sas_ha = sas_phy->ha;
1119 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1120 int phy_no = sas_phy->id;
1121
1122 switch (func) {
1123 case PHY_FUNC_HARD_RESET:
1124 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1125 break;
1126
1127 case PHY_FUNC_LINK_RESET:
1128 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1129 msleep(100);
1130 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1131 break;
1132
1133 case PHY_FUNC_DISABLE:
1134 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1135 break;
1136
1137 case PHY_FUNC_SET_LINK_RATE:
1138 return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1139 case PHY_FUNC_GET_EVENTS:
1140 if (hisi_hba->hw->get_events) {
1141 hisi_hba->hw->get_events(hisi_hba, phy_no);
1142 break;
1143 }
1144 /* fallthru */
1145 case PHY_FUNC_RELEASE_SPINUP_HOLD:
1146 default:
1147 return -EOPNOTSUPP;
1148 }
1149 return 0;
1150 }
1151
1152 static void hisi_sas_task_done(struct sas_task *task)
1153 {
1154 del_timer(&task->slow_task->timer);
1155 complete(&task->slow_task->completion);
1156 }
1157
1158 static void hisi_sas_tmf_timedout(struct timer_list *t)
1159 {
1160 struct sas_task_slow *slow = from_timer(slow, t, timer);
1161 struct sas_task *task = slow->task;
1162 unsigned long flags;
1163 bool is_completed = true;
1164
1165 spin_lock_irqsave(&task->task_state_lock, flags);
1166 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1167 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1168 is_completed = false;
1169 }
1170 spin_unlock_irqrestore(&task->task_state_lock, flags);
1171
1172 if (!is_completed)
1173 complete(&task->slow_task->completion);
1174 }
1175
1176 #define TASK_TIMEOUT 20
1177 #define TASK_RETRY 3
1178 #define INTERNAL_ABORT_TIMEOUT 6
1179 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
1180 void *parameter, u32 para_len,
1181 struct hisi_sas_tmf_task *tmf)
1182 {
1183 struct hisi_sas_device *sas_dev = device->lldd_dev;
1184 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1185 struct device *dev = hisi_hba->dev;
1186 struct sas_task *task;
1187 int res, retry;
1188
1189 for (retry = 0; retry < TASK_RETRY; retry++) {
1190 task = sas_alloc_slow_task(GFP_KERNEL);
1191 if (!task)
1192 return -ENOMEM;
1193
1194 task->dev = device;
1195 task->task_proto = device->tproto;
1196
1197 if (dev_is_sata(device)) {
1198 task->ata_task.device_control_reg_update = 1;
1199 memcpy(&task->ata_task.fis, parameter, para_len);
1200 } else {
1201 memcpy(&task->ssp_task, parameter, para_len);
1202 }
1203 task->task_done = hisi_sas_task_done;
1204
1205 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1206 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT * HZ;
1207 add_timer(&task->slow_task->timer);
1208
1209 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
1210
1211 if (res) {
1212 del_timer(&task->slow_task->timer);
1213 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
1214 res);
1215 goto ex_err;
1216 }
1217
1218 wait_for_completion(&task->slow_task->completion);
1219 res = TMF_RESP_FUNC_FAILED;
1220 /* Even TMF timed out, return direct. */
1221 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1222 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1223 struct hisi_sas_slot *slot = task->lldd_task;
1224
1225 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1226 if (slot) {
1227 struct hisi_sas_cq *cq =
1228 &hisi_hba->cq[slot->dlvry_queue];
1229 /*
1230 * sync irq to avoid free'ing task
1231 * before using task in IO completion
1232 */
1233 synchronize_irq(cq->irq_no);
1234 slot->task = NULL;
1235 }
1236
1237 goto ex_err;
1238 } else
1239 dev_err(dev, "abort tmf: TMF task timeout\n");
1240 }
1241
1242 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1243 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1244 res = TMF_RESP_FUNC_COMPLETE;
1245 break;
1246 }
1247
1248 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1249 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1250 res = TMF_RESP_FUNC_SUCC;
1251 break;
1252 }
1253
1254 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1255 task->task_status.stat == SAS_DATA_UNDERRUN) {
1256 /* no error, but return the number of bytes of
1257 * underrun
1258 */
1259 dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x sts 0x%x underrun\n",
1260 SAS_ADDR(device->sas_addr),
1261 task->task_status.resp,
1262 task->task_status.stat);
1263 res = task->task_status.residual;
1264 break;
1265 }
1266
1267 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1268 task->task_status.stat == SAS_DATA_OVERRUN) {
1269 dev_warn(dev, "abort tmf: blocked task error\n");
1270 res = -EMSGSIZE;
1271 break;
1272 }
1273
1274 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1275 task->task_status.stat == SAS_OPEN_REJECT) {
1276 dev_warn(dev, "abort tmf: open reject failed\n");
1277 res = -EIO;
1278 } else {
1279 dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x status 0x%x\n",
1280 SAS_ADDR(device->sas_addr),
1281 task->task_status.resp,
1282 task->task_status.stat);
1283 }
1284 sas_free_task(task);
1285 task = NULL;
1286 }
1287 ex_err:
1288 if (retry == TASK_RETRY)
1289 dev_warn(dev, "abort tmf: executing internal task failed!\n");
1290 sas_free_task(task);
1291 return res;
1292 }
1293
1294 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1295 bool reset, int pmp, u8 *fis)
1296 {
1297 struct ata_taskfile tf;
1298
1299 ata_tf_init(dev, &tf);
1300 if (reset)
1301 tf.ctl |= ATA_SRST;
1302 else
1303 tf.ctl &= ~ATA_SRST;
1304 tf.command = ATA_CMD_DEV_RESET;
1305 ata_tf_to_fis(&tf, pmp, 0, fis);
1306 }
1307
1308 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1309 {
1310 u8 fis[20] = {0};
1311 struct ata_port *ap = device->sata_dev.ap;
1312 struct ata_link *link;
1313 int rc = TMF_RESP_FUNC_FAILED;
1314 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1315 struct device *dev = hisi_hba->dev;
1316 int s = sizeof(struct host_to_dev_fis);
1317
1318 ata_for_each_link(link, ap, EDGE) {
1319 int pmp = sata_srst_pmp(link);
1320
1321 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1322 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1323 if (rc != TMF_RESP_FUNC_COMPLETE)
1324 break;
1325 }
1326
1327 if (rc == TMF_RESP_FUNC_COMPLETE) {
1328 ata_for_each_link(link, ap, EDGE) {
1329 int pmp = sata_srst_pmp(link);
1330
1331 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1332 rc = hisi_sas_exec_internal_tmf_task(device, fis,
1333 s, NULL);
1334 if (rc != TMF_RESP_FUNC_COMPLETE)
1335 dev_err(dev, "ata disk de-reset failed\n");
1336 }
1337 } else {
1338 dev_err(dev, "ata disk reset failed\n");
1339 }
1340
1341 if (rc == TMF_RESP_FUNC_COMPLETE)
1342 hisi_sas_release_task(hisi_hba, device);
1343
1344 return rc;
1345 }
1346
1347 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1348 u8 *lun, struct hisi_sas_tmf_task *tmf)
1349 {
1350 struct sas_ssp_task ssp_task;
1351
1352 if (!(device->tproto & SAS_PROTOCOL_SSP))
1353 return TMF_RESP_FUNC_ESUPP;
1354
1355 memcpy(ssp_task.LUN, lun, 8);
1356
1357 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1358 sizeof(ssp_task), tmf);
1359 }
1360
1361 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1362 {
1363 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1364 int i;
1365
1366 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1367 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1368 struct domain_device *device = sas_dev->sas_device;
1369 struct asd_sas_port *sas_port;
1370 struct hisi_sas_port *port;
1371 struct hisi_sas_phy *phy = NULL;
1372 struct asd_sas_phy *sas_phy;
1373
1374 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1375 || !device || !device->port)
1376 continue;
1377
1378 sas_port = device->port;
1379 port = to_hisi_sas_port(sas_port);
1380
1381 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1382 if (state & BIT(sas_phy->id)) {
1383 phy = sas_phy->lldd_phy;
1384 break;
1385 }
1386
1387 if (phy) {
1388 port->id = phy->port_id;
1389
1390 /* Update linkrate of directly attached device. */
1391 if (!device->parent)
1392 device->linkrate = phy->sas_phy.linkrate;
1393
1394 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1395 } else
1396 port->id = 0xff;
1397 }
1398 }
1399
1400 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1401 {
1402 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1403 struct asd_sas_port *_sas_port = NULL;
1404 int phy_no;
1405
1406 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1407 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1408 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1409 struct asd_sas_port *sas_port = sas_phy->port;
1410 bool do_port_check = _sas_port != sas_port;
1411
1412 if (!sas_phy->phy->enabled)
1413 continue;
1414
1415 /* Report PHY state change to libsas */
1416 if (state & BIT(phy_no)) {
1417 if (do_port_check && sas_port && sas_port->port_dev) {
1418 struct domain_device *dev = sas_port->port_dev;
1419
1420 _sas_port = sas_port;
1421
1422 if (dev_is_expander(dev->dev_type))
1423 sas_ha->notify_port_event(sas_phy,
1424 PORTE_BROADCAST_RCVD);
1425 }
1426 } else {
1427 hisi_sas_phy_down(hisi_hba, phy_no, 0);
1428 }
1429
1430 }
1431 }
1432
1433 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1434 {
1435 struct hisi_sas_device *sas_dev;
1436 struct domain_device *device;
1437 int i;
1438
1439 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1440 sas_dev = &hisi_hba->devices[i];
1441 device = sas_dev->sas_device;
1442
1443 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1444 continue;
1445
1446 hisi_sas_init_device(device);
1447 }
1448 }
1449
1450 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1451 struct asd_sas_port *sas_port,
1452 struct domain_device *device)
1453 {
1454 struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
1455 struct ata_port *ap = device->sata_dev.ap;
1456 struct device *dev = hisi_hba->dev;
1457 int s = sizeof(struct host_to_dev_fis);
1458 int rc = TMF_RESP_FUNC_FAILED;
1459 struct asd_sas_phy *sas_phy;
1460 struct ata_link *link;
1461 u8 fis[20] = {0};
1462 u32 state;
1463
1464 state = hisi_hba->hw->get_phys_state(hisi_hba);
1465 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) {
1466 if (!(state & BIT(sas_phy->id)))
1467 continue;
1468
1469 ata_for_each_link(link, ap, EDGE) {
1470 int pmp = sata_srst_pmp(link);
1471
1472 tmf_task.phy_id = sas_phy->id;
1473 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1474 rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
1475 &tmf_task);
1476 if (rc != TMF_RESP_FUNC_COMPLETE) {
1477 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1478 sas_phy->id, rc);
1479 break;
1480 }
1481 }
1482 }
1483 }
1484
1485 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1486 {
1487 struct device *dev = hisi_hba->dev;
1488 int port_no, rc, i;
1489
1490 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1491 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1492 struct domain_device *device = sas_dev->sas_device;
1493
1494 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1495 continue;
1496
1497 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1498 HISI_SAS_INT_ABT_DEV, 0);
1499 if (rc < 0)
1500 dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1501 }
1502
1503 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1504 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1505 struct asd_sas_port *sas_port = &port->sas_port;
1506 struct domain_device *port_dev = sas_port->port_dev;
1507 struct domain_device *device;
1508
1509 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1510 continue;
1511
1512 /* Try to find a SATA device */
1513 list_for_each_entry(device, &sas_port->dev_list,
1514 dev_list_node) {
1515 if (dev_is_sata(device)) {
1516 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1517 sas_port,
1518 device);
1519 break;
1520 }
1521 }
1522 }
1523 }
1524
1525 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1526 {
1527 struct Scsi_Host *shost = hisi_hba->shost;
1528
1529 down(&hisi_hba->sem);
1530 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1531
1532 scsi_block_requests(shost);
1533 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1534
1535 if (timer_pending(&hisi_hba->timer))
1536 del_timer_sync(&hisi_hba->timer);
1537
1538 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1539 }
1540 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1541
1542 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1543 {
1544 struct Scsi_Host *shost = hisi_hba->shost;
1545 u32 state;
1546
1547 /* Init and wait for PHYs to come up and all libsas event finished. */
1548 hisi_hba->hw->phys_init(hisi_hba);
1549 msleep(1000);
1550 hisi_sas_refresh_port_id(hisi_hba);
1551 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1552
1553 if (hisi_hba->reject_stp_links_msk)
1554 hisi_sas_terminate_stp_reject(hisi_hba);
1555 hisi_sas_reset_init_all_devices(hisi_hba);
1556 up(&hisi_hba->sem);
1557 scsi_unblock_requests(shost);
1558 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1559
1560 state = hisi_hba->hw->get_phys_state(hisi_hba);
1561 hisi_sas_rescan_topology(hisi_hba, state);
1562 }
1563 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1564
1565 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1566 {
1567 struct device *dev = hisi_hba->dev;
1568 struct Scsi_Host *shost = hisi_hba->shost;
1569 int rc;
1570
1571 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1572 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
1573
1574 if (!hisi_hba->hw->soft_reset)
1575 return -1;
1576
1577 if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1578 return -1;
1579
1580 dev_info(dev, "controller resetting...\n");
1581 hisi_sas_controller_reset_prepare(hisi_hba);
1582
1583 rc = hisi_hba->hw->soft_reset(hisi_hba);
1584 if (rc) {
1585 dev_warn(dev, "controller reset failed (%d)\n", rc);
1586 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1587 up(&hisi_hba->sem);
1588 scsi_unblock_requests(shost);
1589 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1590 return rc;
1591 }
1592
1593 hisi_sas_controller_reset_done(hisi_hba);
1594 dev_info(dev, "controller reset complete\n");
1595
1596 return 0;
1597 }
1598
1599 static int hisi_sas_abort_task(struct sas_task *task)
1600 {
1601 struct scsi_lun lun;
1602 struct hisi_sas_tmf_task tmf_task;
1603 struct domain_device *device = task->dev;
1604 struct hisi_sas_device *sas_dev = device->lldd_dev;
1605 struct hisi_hba *hisi_hba;
1606 struct device *dev;
1607 int rc = TMF_RESP_FUNC_FAILED;
1608 unsigned long flags;
1609
1610 if (!sas_dev)
1611 return TMF_RESP_FUNC_FAILED;
1612
1613 hisi_hba = dev_to_hisi_hba(task->dev);
1614 dev = hisi_hba->dev;
1615
1616 spin_lock_irqsave(&task->task_state_lock, flags);
1617 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1618 struct hisi_sas_slot *slot = task->lldd_task;
1619 struct hisi_sas_cq *cq;
1620
1621 if (slot) {
1622 /*
1623 * sync irq to avoid free'ing task
1624 * before using task in IO completion
1625 */
1626 cq = &hisi_hba->cq[slot->dlvry_queue];
1627 synchronize_irq(cq->irq_no);
1628 }
1629 spin_unlock_irqrestore(&task->task_state_lock, flags);
1630 rc = TMF_RESP_FUNC_COMPLETE;
1631 goto out;
1632 }
1633 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1634 spin_unlock_irqrestore(&task->task_state_lock, flags);
1635
1636 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1637 struct scsi_cmnd *cmnd = task->uldd_task;
1638 struct hisi_sas_slot *slot = task->lldd_task;
1639 u16 tag = slot->idx;
1640 int rc2;
1641
1642 int_to_scsilun(cmnd->device->lun, &lun);
1643 tmf_task.tmf = TMF_ABORT_TASK;
1644 tmf_task.tag_of_task_to_be_managed = tag;
1645
1646 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1647 &tmf_task);
1648
1649 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1650 HISI_SAS_INT_ABT_CMD, tag);
1651 if (rc2 < 0) {
1652 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1653 return TMF_RESP_FUNC_FAILED;
1654 }
1655
1656 /*
1657 * If the TMF finds that the IO is not in the device and also
1658 * the internal abort does not succeed, then it is safe to
1659 * free the slot.
1660 * Note: if the internal abort succeeds then the slot
1661 * will have already been completed
1662 */
1663 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1664 if (task->lldd_task)
1665 hisi_sas_do_release_task(hisi_hba, task, slot);
1666 }
1667 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1668 task->task_proto & SAS_PROTOCOL_STP) {
1669 if (task->dev->dev_type == SAS_SATA_DEV) {
1670 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1671 HISI_SAS_INT_ABT_DEV,
1672 0);
1673 if (rc < 0) {
1674 dev_err(dev, "abort task: internal abort failed\n");
1675 goto out;
1676 }
1677 hisi_sas_dereg_device(hisi_hba, device);
1678 rc = hisi_sas_softreset_ata_disk(device);
1679 }
1680 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1681 /* SMP */
1682 struct hisi_sas_slot *slot = task->lldd_task;
1683 u32 tag = slot->idx;
1684 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1685
1686 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1687 HISI_SAS_INT_ABT_CMD, tag);
1688 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1689 task->lldd_task) {
1690 /*
1691 * sync irq to avoid free'ing task
1692 * before using task in IO completion
1693 */
1694 synchronize_irq(cq->irq_no);
1695 slot->task = NULL;
1696 }
1697 }
1698
1699 out:
1700 if (rc != TMF_RESP_FUNC_COMPLETE)
1701 dev_notice(dev, "abort task: rc=%d\n", rc);
1702 return rc;
1703 }
1704
1705 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1706 {
1707 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1708 struct device *dev = hisi_hba->dev;
1709 struct hisi_sas_tmf_task tmf_task;
1710 int rc;
1711
1712 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1713 HISI_SAS_INT_ABT_DEV, 0);
1714 if (rc < 0) {
1715 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1716 return TMF_RESP_FUNC_FAILED;
1717 }
1718 hisi_sas_dereg_device(hisi_hba, device);
1719
1720 tmf_task.tmf = TMF_ABORT_TASK_SET;
1721 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1722
1723 if (rc == TMF_RESP_FUNC_COMPLETE)
1724 hisi_sas_release_task(hisi_hba, device);
1725
1726 return rc;
1727 }
1728
1729 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1730 {
1731 struct hisi_sas_tmf_task tmf_task;
1732 int rc;
1733
1734 tmf_task.tmf = TMF_CLEAR_ACA;
1735 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1736
1737 return rc;
1738 }
1739
1740 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1741 {
1742 struct sas_phy *local_phy = sas_get_local_phy(device);
1743 struct hisi_sas_device *sas_dev = device->lldd_dev;
1744 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1745 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1746 DECLARE_COMPLETION_ONSTACK(phyreset);
1747 int rc, reset_type;
1748
1749 if (!local_phy->enabled) {
1750 sas_put_local_phy(local_phy);
1751 return -ENODEV;
1752 }
1753
1754 if (scsi_is_sas_phy_local(local_phy)) {
1755 struct asd_sas_phy *sas_phy =
1756 sas_ha->sas_phy[local_phy->number];
1757 struct hisi_sas_phy *phy =
1758 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1759 phy->in_reset = 1;
1760 phy->reset_completion = &phyreset;
1761 }
1762
1763 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1764 !dev_is_sata(device)) ? true : false;
1765
1766 rc = sas_phy_reset(local_phy, reset_type);
1767 sas_put_local_phy(local_phy);
1768
1769 if (scsi_is_sas_phy_local(local_phy)) {
1770 struct asd_sas_phy *sas_phy =
1771 sas_ha->sas_phy[local_phy->number];
1772 struct hisi_sas_phy *phy =
1773 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1774 int ret = wait_for_completion_timeout(&phyreset, 2 * HZ);
1775 unsigned long flags;
1776
1777 spin_lock_irqsave(&phy->lock, flags);
1778 phy->reset_completion = NULL;
1779 phy->in_reset = 0;
1780 spin_unlock_irqrestore(&phy->lock, flags);
1781
1782 /* report PHY down if timed out */
1783 if (!ret)
1784 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0);
1785 } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) {
1786 /*
1787 * If in init state, we rely on caller to wait for link to be
1788 * ready; otherwise, except phy reset is fail, delay.
1789 */
1790 if (!rc)
1791 msleep(2000);
1792 }
1793
1794 return rc;
1795 }
1796
1797 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1798 {
1799 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1800 struct device *dev = hisi_hba->dev;
1801 int rc;
1802
1803 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1804 HISI_SAS_INT_ABT_DEV, 0);
1805 if (rc < 0) {
1806 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1807 return TMF_RESP_FUNC_FAILED;
1808 }
1809 hisi_sas_dereg_device(hisi_hba, device);
1810
1811 if (dev_is_sata(device)) {
1812 rc = hisi_sas_softreset_ata_disk(device);
1813 if (rc == TMF_RESP_FUNC_FAILED)
1814 return TMF_RESP_FUNC_FAILED;
1815 }
1816
1817 rc = hisi_sas_debug_I_T_nexus_reset(device);
1818
1819 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1820 hisi_sas_release_task(hisi_hba, device);
1821
1822 return rc;
1823 }
1824
1825 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1826 {
1827 struct hisi_sas_device *sas_dev = device->lldd_dev;
1828 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1829 struct device *dev = hisi_hba->dev;
1830 int rc = TMF_RESP_FUNC_FAILED;
1831
1832 /* Clear internal IO and then lu reset */
1833 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1834 HISI_SAS_INT_ABT_DEV, 0);
1835 if (rc < 0) {
1836 dev_err(dev, "lu_reset: internal abort failed\n");
1837 goto out;
1838 }
1839 hisi_sas_dereg_device(hisi_hba, device);
1840
1841 if (dev_is_sata(device)) {
1842 struct sas_phy *phy;
1843
1844 phy = sas_get_local_phy(device);
1845
1846 rc = sas_phy_reset(phy, true);
1847
1848 if (rc == 0)
1849 hisi_sas_release_task(hisi_hba, device);
1850 sas_put_local_phy(phy);
1851 } else {
1852 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1853
1854 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1855 if (rc == TMF_RESP_FUNC_COMPLETE)
1856 hisi_sas_release_task(hisi_hba, device);
1857 }
1858 out:
1859 if (rc != TMF_RESP_FUNC_COMPLETE)
1860 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1861 sas_dev->device_id, rc);
1862 return rc;
1863 }
1864
1865 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1866 {
1867 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1868 struct device *dev = hisi_hba->dev;
1869 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1870 int rc, i;
1871
1872 queue_work(hisi_hba->wq, &r.work);
1873 wait_for_completion(r.completion);
1874 if (!r.done)
1875 return TMF_RESP_FUNC_FAILED;
1876
1877 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1878 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1879 struct domain_device *device = sas_dev->sas_device;
1880
1881 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1882 dev_is_expander(device->dev_type))
1883 continue;
1884
1885 rc = hisi_sas_debug_I_T_nexus_reset(device);
1886 if (rc != TMF_RESP_FUNC_COMPLETE)
1887 dev_info(dev, "clear nexus ha: for device[%d] rc=%d\n",
1888 sas_dev->device_id, rc);
1889 }
1890
1891 hisi_sas_release_tasks(hisi_hba);
1892
1893 return TMF_RESP_FUNC_COMPLETE;
1894 }
1895
1896 static int hisi_sas_query_task(struct sas_task *task)
1897 {
1898 struct scsi_lun lun;
1899 struct hisi_sas_tmf_task tmf_task;
1900 int rc = TMF_RESP_FUNC_FAILED;
1901
1902 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1903 struct scsi_cmnd *cmnd = task->uldd_task;
1904 struct domain_device *device = task->dev;
1905 struct hisi_sas_slot *slot = task->lldd_task;
1906 u32 tag = slot->idx;
1907
1908 int_to_scsilun(cmnd->device->lun, &lun);
1909 tmf_task.tmf = TMF_QUERY_TASK;
1910 tmf_task.tag_of_task_to_be_managed = tag;
1911
1912 rc = hisi_sas_debug_issue_ssp_tmf(device,
1913 lun.scsi_lun,
1914 &tmf_task);
1915 switch (rc) {
1916 /* The task is still in Lun, release it then */
1917 case TMF_RESP_FUNC_SUCC:
1918 /* The task is not in Lun or failed, reset the phy */
1919 case TMF_RESP_FUNC_FAILED:
1920 case TMF_RESP_FUNC_COMPLETE:
1921 break;
1922 default:
1923 rc = TMF_RESP_FUNC_FAILED;
1924 break;
1925 }
1926 }
1927 return rc;
1928 }
1929
1930 static int
1931 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1932 struct sas_task *task, int abort_flag,
1933 int task_tag, struct hisi_sas_dq *dq)
1934 {
1935 struct domain_device *device = task->dev;
1936 struct hisi_sas_device *sas_dev = device->lldd_dev;
1937 struct device *dev = hisi_hba->dev;
1938 struct hisi_sas_port *port;
1939 struct hisi_sas_slot *slot;
1940 struct asd_sas_port *sas_port = device->port;
1941 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1942 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1943 unsigned long flags;
1944 int wr_q_index;
1945
1946 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1947 return -EINVAL;
1948
1949 if (!device->port)
1950 return -1;
1951
1952 port = to_hisi_sas_port(sas_port);
1953
1954 /* simply get a slot and send abort command */
1955 rc = hisi_sas_slot_index_alloc(hisi_hba, NULL);
1956 if (rc < 0)
1957 goto err_out;
1958
1959 slot_idx = rc;
1960 slot = &hisi_hba->slot_info[slot_idx];
1961
1962 spin_lock(&dq->lock);
1963 wr_q_index = dq->wr_point;
1964 dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
1965 list_add_tail(&slot->delivery, &dq->list);
1966 spin_unlock(&dq->lock);
1967 spin_lock(&sas_dev->lock);
1968 list_add_tail(&slot->entry, &sas_dev->list);
1969 spin_unlock(&sas_dev->lock);
1970
1971 dlvry_queue = dq->id;
1972 dlvry_queue_slot = wr_q_index;
1973
1974 slot->device_id = sas_dev->device_id;
1975 slot->n_elem = n_elem;
1976 slot->dlvry_queue = dlvry_queue;
1977 slot->dlvry_queue_slot = dlvry_queue_slot;
1978 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1979 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1980 slot->task = task;
1981 slot->port = port;
1982 slot->is_internal = true;
1983 task->lldd_task = slot;
1984
1985 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1986 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1987 memset(hisi_sas_status_buf_addr_mem(slot), 0,
1988 sizeof(struct hisi_sas_err_record));
1989
1990 hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1991 abort_flag, task_tag);
1992
1993 spin_lock_irqsave(&task->task_state_lock, flags);
1994 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1995 spin_unlock_irqrestore(&task->task_state_lock, flags);
1996 WRITE_ONCE(slot->ready, 1);
1997 /* send abort command to the chip */
1998 spin_lock(&dq->lock);
1999 hisi_hba->hw->start_delivery(dq);
2000 spin_unlock(&dq->lock);
2001
2002 return 0;
2003
2004 err_out:
2005 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
2006
2007 return rc;
2008 }
2009
2010 /**
2011 * _hisi_sas_internal_task_abort -- execute an internal
2012 * abort command for single IO command or a device
2013 * @hisi_hba: host controller struct
2014 * @device: domain device
2015 * @abort_flag: mode of operation, device or single IO
2016 * @tag: tag of IO to be aborted (only relevant to single
2017 * IO mode)
2018 * @dq: delivery queue for this internal abort command
2019 */
2020 static int
2021 _hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2022 struct domain_device *device, int abort_flag,
2023 int tag, struct hisi_sas_dq *dq)
2024 {
2025 struct sas_task *task;
2026 struct hisi_sas_device *sas_dev = device->lldd_dev;
2027 struct device *dev = hisi_hba->dev;
2028 int res;
2029
2030 /*
2031 * The interface is not realized means this HW don't support internal
2032 * abort, or don't need to do internal abort. Then here, we return
2033 * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
2034 * the internal abort has been executed and returned CQ.
2035 */
2036 if (!hisi_hba->hw->prep_abort)
2037 return TMF_RESP_FUNC_FAILED;
2038
2039 task = sas_alloc_slow_task(GFP_KERNEL);
2040 if (!task)
2041 return -ENOMEM;
2042
2043 task->dev = device;
2044 task->task_proto = device->tproto;
2045 task->task_done = hisi_sas_task_done;
2046 task->slow_task->timer.function = hisi_sas_tmf_timedout;
2047 task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT * HZ;
2048 add_timer(&task->slow_task->timer);
2049
2050 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
2051 task, abort_flag, tag, dq);
2052 if (res) {
2053 del_timer(&task->slow_task->timer);
2054 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
2055 res);
2056 goto exit;
2057 }
2058 wait_for_completion(&task->slow_task->completion);
2059 res = TMF_RESP_FUNC_FAILED;
2060
2061 /* Internal abort timed out */
2062 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
2063 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
2064 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
2065
2066 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
2067 struct hisi_sas_slot *slot = task->lldd_task;
2068
2069 if (slot) {
2070 struct hisi_sas_cq *cq =
2071 &hisi_hba->cq[slot->dlvry_queue];
2072 /*
2073 * sync irq to avoid free'ing task
2074 * before using task in IO completion
2075 */
2076 synchronize_irq(cq->irq_no);
2077 slot->task = NULL;
2078 }
2079 dev_err(dev, "internal task abort: timeout and not done.\n");
2080
2081 res = -EIO;
2082 goto exit;
2083 } else
2084 dev_err(dev, "internal task abort: timeout.\n");
2085 }
2086
2087 if (task->task_status.resp == SAS_TASK_COMPLETE &&
2088 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
2089 res = TMF_RESP_FUNC_COMPLETE;
2090 goto exit;
2091 }
2092
2093 if (task->task_status.resp == SAS_TASK_COMPLETE &&
2094 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
2095 res = TMF_RESP_FUNC_SUCC;
2096 goto exit;
2097 }
2098
2099 exit:
2100 dev_dbg(dev, "internal task abort: task to dev %016llx task=%pK resp: 0x%x sts 0x%x\n",
2101 SAS_ADDR(device->sas_addr), task,
2102 task->task_status.resp, /* 0 is complete, -1 is undelivered */
2103 task->task_status.stat);
2104 sas_free_task(task);
2105
2106 return res;
2107 }
2108
2109 static int
2110 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2111 struct domain_device *device,
2112 int abort_flag, int tag)
2113 {
2114 struct hisi_sas_slot *slot;
2115 struct device *dev = hisi_hba->dev;
2116 struct hisi_sas_dq *dq;
2117 int i, rc;
2118
2119 switch (abort_flag) {
2120 case HISI_SAS_INT_ABT_CMD:
2121 slot = &hisi_hba->slot_info[tag];
2122 dq = &hisi_hba->dq[slot->dlvry_queue];
2123 return _hisi_sas_internal_task_abort(hisi_hba, device,
2124 abort_flag, tag, dq);
2125 case HISI_SAS_INT_ABT_DEV:
2126 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2127 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2128 const struct cpumask *mask = cq->irq_mask;
2129
2130 if (mask && !cpumask_intersects(cpu_online_mask, mask))
2131 continue;
2132 dq = &hisi_hba->dq[i];
2133 rc = _hisi_sas_internal_task_abort(hisi_hba, device,
2134 abort_flag, tag,
2135 dq);
2136 if (rc)
2137 return rc;
2138 }
2139 break;
2140 default:
2141 dev_err(dev, "Unrecognised internal abort flag (%d)\n",
2142 abort_flag);
2143 return -EINVAL;
2144 }
2145
2146 return 0;
2147 }
2148
2149 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2150 {
2151 hisi_sas_port_notify_formed(sas_phy);
2152 }
2153
2154 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2155 u8 reg_index, u8 reg_count, u8 *write_data)
2156 {
2157 struct hisi_hba *hisi_hba = sha->lldd_ha;
2158
2159 if (!hisi_hba->hw->write_gpio)
2160 return -EOPNOTSUPP;
2161
2162 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2163 reg_index, reg_count, write_data);
2164 }
2165
2166 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2167 {
2168 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2169 struct sas_phy *sphy = sas_phy->phy;
2170 unsigned long flags;
2171
2172 phy->phy_attached = 0;
2173 phy->phy_type = 0;
2174 phy->port = NULL;
2175
2176 spin_lock_irqsave(&phy->lock, flags);
2177 if (phy->enable)
2178 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2179 else
2180 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2181 spin_unlock_irqrestore(&phy->lock, flags);
2182 }
2183
2184 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
2185 {
2186 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2187 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2188 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
2189 struct device *dev = hisi_hba->dev;
2190
2191 if (rdy) {
2192 /* Phy down but ready */
2193 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
2194 hisi_sas_port_notify_formed(sas_phy);
2195 } else {
2196 struct hisi_sas_port *port = phy->port;
2197
2198 if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
2199 phy->in_reset) {
2200 dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2201 return;
2202 }
2203 /* Phy down and not ready */
2204 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
2205 sas_phy_disconnected(sas_phy);
2206
2207 if (port) {
2208 if (phy->phy_type & PORT_TYPE_SAS) {
2209 int port_id = port->id;
2210
2211 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2212 port_id))
2213 port->port_attached = 0;
2214 } else if (phy->phy_type & PORT_TYPE_SATA)
2215 port->port_attached = 0;
2216 }
2217 hisi_sas_phy_disconnected(phy);
2218 }
2219 }
2220 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2221
2222 void hisi_sas_sync_irqs(struct hisi_hba *hisi_hba)
2223 {
2224 int i;
2225
2226 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2227 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2228
2229 synchronize_irq(cq->irq_no);
2230 }
2231 }
2232 EXPORT_SYMBOL_GPL(hisi_sas_sync_irqs);
2233
2234 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2235 {
2236 struct hisi_hba *hisi_hba = shost_priv(shost);
2237
2238 if (reset_type != SCSI_ADAPTER_RESET)
2239 return -EOPNOTSUPP;
2240
2241 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2242
2243 return 0;
2244 }
2245 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2246
2247 struct scsi_transport_template *hisi_sas_stt;
2248 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2249
2250 static struct sas_domain_function_template hisi_sas_transport_ops = {
2251 .lldd_dev_found = hisi_sas_dev_found,
2252 .lldd_dev_gone = hisi_sas_dev_gone,
2253 .lldd_execute_task = hisi_sas_queue_command,
2254 .lldd_control_phy = hisi_sas_control_phy,
2255 .lldd_abort_task = hisi_sas_abort_task,
2256 .lldd_abort_task_set = hisi_sas_abort_task_set,
2257 .lldd_clear_aca = hisi_sas_clear_aca,
2258 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
2259 .lldd_lu_reset = hisi_sas_lu_reset,
2260 .lldd_query_task = hisi_sas_query_task,
2261 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
2262 .lldd_port_formed = hisi_sas_port_formed,
2263 .lldd_write_gpio = hisi_sas_write_gpio,
2264 };
2265
2266 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2267 {
2268 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2269 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2270
2271 for (i = 0; i < hisi_hba->queue_count; i++) {
2272 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2273 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2274 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2275
2276 s = sizeof(struct hisi_sas_cmd_hdr);
2277 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2278 memset(&cmd_hdr[j], 0, s);
2279
2280 dq->wr_point = 0;
2281
2282 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2283 memset(hisi_hba->complete_hdr[i], 0, s);
2284 cq->rd_point = 0;
2285 }
2286
2287 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2288 memset(hisi_hba->initial_fis, 0, s);
2289
2290 s = max_command_entries * sizeof(struct hisi_sas_iost);
2291 memset(hisi_hba->iost, 0, s);
2292
2293 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2294 memset(hisi_hba->breakpoint, 0, s);
2295
2296 s = sizeof(struct hisi_sas_sata_breakpoint);
2297 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2298 memset(&sata_breakpoint[j], 0, s);
2299 }
2300 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2301
2302 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2303 {
2304 struct device *dev = hisi_hba->dev;
2305 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2306 int max_command_entries_ru, sz_slot_buf_ru;
2307 int blk_cnt, slots_per_blk;
2308
2309 sema_init(&hisi_hba->sem, 1);
2310 spin_lock_init(&hisi_hba->lock);
2311 for (i = 0; i < hisi_hba->n_phy; i++) {
2312 hisi_sas_phy_init(hisi_hba, i);
2313 hisi_hba->port[i].port_attached = 0;
2314 hisi_hba->port[i].id = -1;
2315 }
2316
2317 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2318 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2319 hisi_hba->devices[i].device_id = i;
2320 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2321 }
2322
2323 for (i = 0; i < hisi_hba->queue_count; i++) {
2324 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2325 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2326
2327 /* Completion queue structure */
2328 cq->id = i;
2329 cq->hisi_hba = hisi_hba;
2330
2331 /* Delivery queue structure */
2332 spin_lock_init(&dq->lock);
2333 INIT_LIST_HEAD(&dq->list);
2334 dq->id = i;
2335 dq->hisi_hba = hisi_hba;
2336
2337 /* Delivery queue */
2338 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2339 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2340 &hisi_hba->cmd_hdr_dma[i],
2341 GFP_KERNEL);
2342 if (!hisi_hba->cmd_hdr[i])
2343 goto err_out;
2344
2345 /* Completion queue */
2346 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2347 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2348 &hisi_hba->complete_hdr_dma[i],
2349 GFP_KERNEL);
2350 if (!hisi_hba->complete_hdr[i])
2351 goto err_out;
2352 }
2353
2354 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2355 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2356 GFP_KERNEL);
2357 if (!hisi_hba->itct)
2358 goto err_out;
2359
2360 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2361 sizeof(struct hisi_sas_slot),
2362 GFP_KERNEL);
2363 if (!hisi_hba->slot_info)
2364 goto err_out;
2365
2366 /* roundup to avoid overly large block size */
2367 max_command_entries_ru = roundup(max_command_entries, 64);
2368 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2369 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2370 else
2371 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2372 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2373 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2374 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2375 slots_per_blk = s / sz_slot_buf_ru;
2376
2377 for (i = 0; i < blk_cnt; i++) {
2378 int slot_index = i * slots_per_blk;
2379 dma_addr_t buf_dma;
2380 void *buf;
2381
2382 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2383 GFP_KERNEL);
2384 if (!buf)
2385 goto err_out;
2386
2387 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2388 struct hisi_sas_slot *slot;
2389
2390 slot = &hisi_hba->slot_info[slot_index];
2391 slot->buf = buf;
2392 slot->buf_dma = buf_dma;
2393 slot->idx = slot_index;
2394
2395 buf += sz_slot_buf_ru;
2396 buf_dma += sz_slot_buf_ru;
2397 }
2398 }
2399
2400 s = max_command_entries * sizeof(struct hisi_sas_iost);
2401 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2402 GFP_KERNEL);
2403 if (!hisi_hba->iost)
2404 goto err_out;
2405
2406 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2407 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2408 &hisi_hba->breakpoint_dma,
2409 GFP_KERNEL);
2410 if (!hisi_hba->breakpoint)
2411 goto err_out;
2412
2413 hisi_hba->slot_index_count = max_command_entries;
2414 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
2415 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
2416 if (!hisi_hba->slot_index_tags)
2417 goto err_out;
2418
2419 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2420 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2421 &hisi_hba->initial_fis_dma,
2422 GFP_KERNEL);
2423 if (!hisi_hba->initial_fis)
2424 goto err_out;
2425
2426 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2427 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2428 &hisi_hba->sata_breakpoint_dma,
2429 GFP_KERNEL);
2430 if (!hisi_hba->sata_breakpoint)
2431 goto err_out;
2432
2433 hisi_sas_slot_index_init(hisi_hba);
2434 hisi_hba->last_slot_index = HISI_SAS_UNRESERVED_IPTT;
2435
2436 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2437 if (!hisi_hba->wq) {
2438 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2439 goto err_out;
2440 }
2441
2442 return 0;
2443 err_out:
2444 return -ENOMEM;
2445 }
2446 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2447
2448 void hisi_sas_free(struct hisi_hba *hisi_hba)
2449 {
2450 int i;
2451
2452 for (i = 0; i < hisi_hba->n_phy; i++) {
2453 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2454
2455 del_timer_sync(&phy->timer);
2456 }
2457
2458 if (hisi_hba->wq)
2459 destroy_workqueue(hisi_hba->wq);
2460 }
2461 EXPORT_SYMBOL_GPL(hisi_sas_free);
2462
2463 void hisi_sas_rst_work_handler(struct work_struct *work)
2464 {
2465 struct hisi_hba *hisi_hba =
2466 container_of(work, struct hisi_hba, rst_work);
2467
2468 hisi_sas_controller_reset(hisi_hba);
2469 }
2470 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2471
2472 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2473 {
2474 struct hisi_sas_rst *rst =
2475 container_of(work, struct hisi_sas_rst, work);
2476
2477 if (!hisi_sas_controller_reset(rst->hisi_hba))
2478 rst->done = true;
2479 complete(rst->completion);
2480 }
2481 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2482
2483 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2484 {
2485 struct device *dev = hisi_hba->dev;
2486 struct platform_device *pdev = hisi_hba->platform_dev;
2487 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2488 struct clk *refclk;
2489
2490 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2491 SAS_ADDR_SIZE)) {
2492 dev_err(dev, "could not get property sas-addr\n");
2493 return -ENOENT;
2494 }
2495
2496 if (np) {
2497 /*
2498 * These properties are only required for platform device-based
2499 * controller with DT firmware.
2500 */
2501 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2502 "hisilicon,sas-syscon");
2503 if (IS_ERR(hisi_hba->ctrl)) {
2504 dev_err(dev, "could not get syscon\n");
2505 return -ENOENT;
2506 }
2507
2508 if (device_property_read_u32(dev, "ctrl-reset-reg",
2509 &hisi_hba->ctrl_reset_reg)) {
2510 dev_err(dev, "could not get property ctrl-reset-reg\n");
2511 return -ENOENT;
2512 }
2513
2514 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2515 &hisi_hba->ctrl_reset_sts_reg)) {
2516 dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2517 return -ENOENT;
2518 }
2519
2520 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2521 &hisi_hba->ctrl_clock_ena_reg)) {
2522 dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2523 return -ENOENT;
2524 }
2525 }
2526
2527 refclk = devm_clk_get(dev, NULL);
2528 if (IS_ERR(refclk))
2529 dev_dbg(dev, "no ref clk property\n");
2530 else
2531 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2532
2533 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2534 dev_err(dev, "could not get property phy-count\n");
2535 return -ENOENT;
2536 }
2537
2538 if (device_property_read_u32(dev, "queue-count",
2539 &hisi_hba->queue_count)) {
2540 dev_err(dev, "could not get property queue-count\n");
2541 return -ENOENT;
2542 }
2543
2544 return 0;
2545 }
2546 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2547
2548 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2549 const struct hisi_sas_hw *hw)
2550 {
2551 struct resource *res;
2552 struct Scsi_Host *shost;
2553 struct hisi_hba *hisi_hba;
2554 struct device *dev = &pdev->dev;
2555 int error;
2556
2557 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2558 if (!shost) {
2559 dev_err(dev, "scsi host alloc failed\n");
2560 return NULL;
2561 }
2562 hisi_hba = shost_priv(shost);
2563
2564 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2565 hisi_hba->hw = hw;
2566 hisi_hba->dev = dev;
2567 hisi_hba->platform_dev = pdev;
2568 hisi_hba->shost = shost;
2569 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2570
2571 timer_setup(&hisi_hba->timer, NULL, 0);
2572
2573 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2574 goto err_out;
2575
2576 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2577 if (error)
2578 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
2579
2580 if (error) {
2581 dev_err(dev, "No usable DMA addressing method\n");
2582 goto err_out;
2583 }
2584
2585 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2586 if (IS_ERR(hisi_hba->regs))
2587 goto err_out;
2588
2589 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2590 if (res) {
2591 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2592 if (IS_ERR(hisi_hba->sgpio_regs))
2593 goto err_out;
2594 }
2595
2596 if (hisi_sas_alloc(hisi_hba)) {
2597 hisi_sas_free(hisi_hba);
2598 goto err_out;
2599 }
2600
2601 return shost;
2602 err_out:
2603 scsi_host_put(shost);
2604 dev_err(dev, "shost alloc failed\n");
2605 return NULL;
2606 }
2607
2608 int hisi_sas_probe(struct platform_device *pdev,
2609 const struct hisi_sas_hw *hw)
2610 {
2611 struct Scsi_Host *shost;
2612 struct hisi_hba *hisi_hba;
2613 struct device *dev = &pdev->dev;
2614 struct asd_sas_phy **arr_phy;
2615 struct asd_sas_port **arr_port;
2616 struct sas_ha_struct *sha;
2617 int rc, phy_nr, port_nr, i;
2618
2619 shost = hisi_sas_shost_alloc(pdev, hw);
2620 if (!shost)
2621 return -ENOMEM;
2622
2623 sha = SHOST_TO_SAS_HA(shost);
2624 hisi_hba = shost_priv(shost);
2625 platform_set_drvdata(pdev, sha);
2626
2627 phy_nr = port_nr = hisi_hba->n_phy;
2628
2629 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2630 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2631 if (!arr_phy || !arr_port) {
2632 rc = -ENOMEM;
2633 goto err_out_ha;
2634 }
2635
2636 sha->sas_phy = arr_phy;
2637 sha->sas_port = arr_port;
2638 sha->lldd_ha = hisi_hba;
2639
2640 shost->transportt = hisi_sas_stt;
2641 shost->max_id = HISI_SAS_MAX_DEVICES;
2642 shost->max_lun = ~0;
2643 shost->max_channel = 1;
2644 shost->max_cmd_len = 16;
2645 if (hisi_hba->hw->slot_index_alloc) {
2646 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2647 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2648 } else {
2649 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2650 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2651 }
2652
2653 sha->sas_ha_name = DRV_NAME;
2654 sha->dev = hisi_hba->dev;
2655 sha->lldd_module = THIS_MODULE;
2656 sha->sas_addr = &hisi_hba->sas_addr[0];
2657 sha->num_phys = hisi_hba->n_phy;
2658 sha->core.shost = hisi_hba->shost;
2659
2660 for (i = 0; i < hisi_hba->n_phy; i++) {
2661 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2662 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2663 }
2664
2665 rc = scsi_add_host(shost, &pdev->dev);
2666 if (rc)
2667 goto err_out_ha;
2668
2669 rc = sas_register_ha(sha);
2670 if (rc)
2671 goto err_out_register_ha;
2672
2673 rc = hisi_hba->hw->hw_init(hisi_hba);
2674 if (rc)
2675 goto err_out_register_ha;
2676
2677 scsi_scan_host(shost);
2678
2679 return 0;
2680
2681 err_out_register_ha:
2682 scsi_remove_host(shost);
2683 err_out_ha:
2684 hisi_sas_debugfs_exit(hisi_hba);
2685 hisi_sas_free(hisi_hba);
2686 scsi_host_put(shost);
2687 return rc;
2688 }
2689 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2690
2691 struct dentry *hisi_sas_debugfs_dir;
2692
2693 static void hisi_sas_debugfs_snapshot_cq_reg(struct hisi_hba *hisi_hba)
2694 {
2695 int queue_entry_size = hisi_hba->hw->complete_hdr_size;
2696 int dump_index = hisi_hba->debugfs_dump_index;
2697 int i;
2698
2699 for (i = 0; i < hisi_hba->queue_count; i++)
2700 memcpy(hisi_hba->debugfs_cq[dump_index][i].complete_hdr,
2701 hisi_hba->complete_hdr[i],
2702 HISI_SAS_QUEUE_SLOTS * queue_entry_size);
2703 }
2704
2705 static void hisi_sas_debugfs_snapshot_dq_reg(struct hisi_hba *hisi_hba)
2706 {
2707 int queue_entry_size = sizeof(struct hisi_sas_cmd_hdr);
2708 int dump_index = hisi_hba->debugfs_dump_index;
2709 int i;
2710
2711 for (i = 0; i < hisi_hba->queue_count; i++) {
2712 struct hisi_sas_cmd_hdr *debugfs_cmd_hdr, *cmd_hdr;
2713 int j;
2714
2715 debugfs_cmd_hdr = hisi_hba->debugfs_dq[dump_index][i].hdr;
2716 cmd_hdr = hisi_hba->cmd_hdr[i];
2717
2718 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2719 memcpy(&debugfs_cmd_hdr[j], &cmd_hdr[j],
2720 queue_entry_size);
2721 }
2722 }
2723
2724 static void hisi_sas_debugfs_snapshot_port_reg(struct hisi_hba *hisi_hba)
2725 {
2726 int dump_index = hisi_hba->debugfs_dump_index;
2727 const struct hisi_sas_debugfs_reg *port =
2728 hisi_hba->hw->debugfs_reg_port;
2729 int i, phy_cnt;
2730 u32 offset;
2731 u32 *databuf;
2732
2733 for (phy_cnt = 0; phy_cnt < hisi_hba->n_phy; phy_cnt++) {
2734 databuf = hisi_hba->debugfs_port_reg[dump_index][phy_cnt].data;
2735 for (i = 0; i < port->count; i++, databuf++) {
2736 offset = port->base_off + 4 * i;
2737 *databuf = port->read_port_reg(hisi_hba, phy_cnt,
2738 offset);
2739 }
2740 }
2741 }
2742
2743 static void hisi_sas_debugfs_snapshot_global_reg(struct hisi_hba *hisi_hba)
2744 {
2745 int dump_index = hisi_hba->debugfs_dump_index;
2746 u32 *databuf = hisi_hba->debugfs_regs[dump_index][DEBUGFS_GLOBAL].data;
2747 const struct hisi_sas_hw *hw = hisi_hba->hw;
2748 const struct hisi_sas_debugfs_reg *global =
2749 hw->debugfs_reg_array[DEBUGFS_GLOBAL];
2750 int i;
2751
2752 for (i = 0; i < global->count; i++, databuf++)
2753 *databuf = global->read_global_reg(hisi_hba, 4 * i);
2754 }
2755
2756 static void hisi_sas_debugfs_snapshot_axi_reg(struct hisi_hba *hisi_hba)
2757 {
2758 int dump_index = hisi_hba->debugfs_dump_index;
2759 u32 *databuf = hisi_hba->debugfs_regs[dump_index][DEBUGFS_AXI].data;
2760 const struct hisi_sas_hw *hw = hisi_hba->hw;
2761 const struct hisi_sas_debugfs_reg *axi =
2762 hw->debugfs_reg_array[DEBUGFS_AXI];
2763 int i;
2764
2765 for (i = 0; i < axi->count; i++, databuf++)
2766 *databuf = axi->read_global_reg(hisi_hba,
2767 4 * i + axi->base_off);
2768 }
2769
2770 static void hisi_sas_debugfs_snapshot_ras_reg(struct hisi_hba *hisi_hba)
2771 {
2772 int dump_index = hisi_hba->debugfs_dump_index;
2773 u32 *databuf = hisi_hba->debugfs_regs[dump_index][DEBUGFS_RAS].data;
2774 const struct hisi_sas_hw *hw = hisi_hba->hw;
2775 const struct hisi_sas_debugfs_reg *ras =
2776 hw->debugfs_reg_array[DEBUGFS_RAS];
2777 int i;
2778
2779 for (i = 0; i < ras->count; i++, databuf++)
2780 *databuf = ras->read_global_reg(hisi_hba,
2781 4 * i + ras->base_off);
2782 }
2783
2784 static void hisi_sas_debugfs_snapshot_itct_reg(struct hisi_hba *hisi_hba)
2785 {
2786 int dump_index = hisi_hba->debugfs_dump_index;
2787 void *cachebuf = hisi_hba->debugfs_itct_cache[dump_index].cache;
2788 void *databuf = hisi_hba->debugfs_itct[dump_index].itct;
2789 struct hisi_sas_itct *itct;
2790 int i;
2791
2792 hisi_hba->hw->read_iost_itct_cache(hisi_hba, HISI_SAS_ITCT_CACHE,
2793 cachebuf);
2794
2795 itct = hisi_hba->itct;
2796
2797 for (i = 0; i < HISI_SAS_MAX_ITCT_ENTRIES; i++, itct++) {
2798 memcpy(databuf, itct, sizeof(struct hisi_sas_itct));
2799 databuf += sizeof(struct hisi_sas_itct);
2800 }
2801 }
2802
2803 static void hisi_sas_debugfs_snapshot_iost_reg(struct hisi_hba *hisi_hba)
2804 {
2805 int dump_index = hisi_hba->debugfs_dump_index;
2806 int max_command_entries = HISI_SAS_MAX_COMMANDS;
2807 void *cachebuf = hisi_hba->debugfs_iost_cache[dump_index].cache;
2808 void *databuf = hisi_hba->debugfs_iost[dump_index].iost;
2809 struct hisi_sas_iost *iost;
2810 int i;
2811
2812 hisi_hba->hw->read_iost_itct_cache(hisi_hba, HISI_SAS_IOST_CACHE,
2813 cachebuf);
2814
2815 iost = hisi_hba->iost;
2816
2817 for (i = 0; i < max_command_entries; i++, iost++) {
2818 memcpy(databuf, iost, sizeof(struct hisi_sas_iost));
2819 databuf += sizeof(struct hisi_sas_iost);
2820 }
2821 }
2822
2823 static const char *
2824 hisi_sas_debugfs_to_reg_name(int off, int base_off,
2825 const struct hisi_sas_debugfs_reg_lu *lu)
2826 {
2827 for (; lu->name; lu++) {
2828 if (off == lu->off - base_off)
2829 return lu->name;
2830 }
2831
2832 return NULL;
2833 }
2834
2835 static void hisi_sas_debugfs_print_reg(u32 *regs_val, const void *ptr,
2836 struct seq_file *s)
2837 {
2838 const struct hisi_sas_debugfs_reg *reg = ptr;
2839 int i;
2840
2841 for (i = 0; i < reg->count; i++) {
2842 int off = i * 4;
2843 const char *name;
2844
2845 name = hisi_sas_debugfs_to_reg_name(off, reg->base_off,
2846 reg->lu);
2847
2848 if (name)
2849 seq_printf(s, "0x%08x 0x%08x %s\n", off,
2850 regs_val[i], name);
2851 else
2852 seq_printf(s, "0x%08x 0x%08x\n", off,
2853 regs_val[i]);
2854 }
2855 }
2856
2857 static int hisi_sas_debugfs_global_show(struct seq_file *s, void *p)
2858 {
2859 struct hisi_sas_debugfs_regs *global = s->private;
2860 struct hisi_hba *hisi_hba = global->hisi_hba;
2861 const struct hisi_sas_hw *hw = hisi_hba->hw;
2862 const void *reg_global = hw->debugfs_reg_array[DEBUGFS_GLOBAL];
2863
2864 hisi_sas_debugfs_print_reg(global->data,
2865 reg_global, s);
2866
2867 return 0;
2868 }
2869
2870 static int hisi_sas_debugfs_global_open(struct inode *inode, struct file *filp)
2871 {
2872 return single_open(filp, hisi_sas_debugfs_global_show,
2873 inode->i_private);
2874 }
2875
2876 static const struct file_operations hisi_sas_debugfs_global_fops = {
2877 .open = hisi_sas_debugfs_global_open,
2878 .read = seq_read,
2879 .llseek = seq_lseek,
2880 .release = single_release,
2881 .owner = THIS_MODULE,
2882 };
2883
2884 static int hisi_sas_debugfs_axi_show(struct seq_file *s, void *p)
2885 {
2886 struct hisi_sas_debugfs_regs *axi = s->private;
2887 struct hisi_hba *hisi_hba = axi->hisi_hba;
2888 const struct hisi_sas_hw *hw = hisi_hba->hw;
2889 const void *reg_axi = hw->debugfs_reg_array[DEBUGFS_AXI];
2890
2891 hisi_sas_debugfs_print_reg(axi->data,
2892 reg_axi, s);
2893
2894 return 0;
2895 }
2896
2897 static int hisi_sas_debugfs_axi_open(struct inode *inode, struct file *filp)
2898 {
2899 return single_open(filp, hisi_sas_debugfs_axi_show,
2900 inode->i_private);
2901 }
2902
2903 static const struct file_operations hisi_sas_debugfs_axi_fops = {
2904 .open = hisi_sas_debugfs_axi_open,
2905 .read = seq_read,
2906 .llseek = seq_lseek,
2907 .release = single_release,
2908 .owner = THIS_MODULE,
2909 };
2910
2911 static int hisi_sas_debugfs_ras_show(struct seq_file *s, void *p)
2912 {
2913 struct hisi_sas_debugfs_regs *ras = s->private;
2914 struct hisi_hba *hisi_hba = ras->hisi_hba;
2915 const struct hisi_sas_hw *hw = hisi_hba->hw;
2916 const void *reg_ras = hw->debugfs_reg_array[DEBUGFS_RAS];
2917
2918 hisi_sas_debugfs_print_reg(ras->data,
2919 reg_ras, s);
2920
2921 return 0;
2922 }
2923
2924 static int hisi_sas_debugfs_ras_open(struct inode *inode, struct file *filp)
2925 {
2926 return single_open(filp, hisi_sas_debugfs_ras_show,
2927 inode->i_private);
2928 }
2929
2930 static const struct file_operations hisi_sas_debugfs_ras_fops = {
2931 .open = hisi_sas_debugfs_ras_open,
2932 .read = seq_read,
2933 .llseek = seq_lseek,
2934 .release = single_release,
2935 .owner = THIS_MODULE,
2936 };
2937
2938 static int hisi_sas_debugfs_port_show(struct seq_file *s, void *p)
2939 {
2940 struct hisi_sas_debugfs_port *port = s->private;
2941 struct hisi_sas_phy *phy = port->phy;
2942 struct hisi_hba *hisi_hba = phy->hisi_hba;
2943 const struct hisi_sas_hw *hw = hisi_hba->hw;
2944 const struct hisi_sas_debugfs_reg *reg_port = hw->debugfs_reg_port;
2945
2946 hisi_sas_debugfs_print_reg(port->data, reg_port, s);
2947
2948 return 0;
2949 }
2950
2951 static int hisi_sas_debugfs_port_open(struct inode *inode, struct file *filp)
2952 {
2953 return single_open(filp, hisi_sas_debugfs_port_show, inode->i_private);
2954 }
2955
2956 static const struct file_operations hisi_sas_debugfs_port_fops = {
2957 .open = hisi_sas_debugfs_port_open,
2958 .read = seq_read,
2959 .llseek = seq_lseek,
2960 .release = single_release,
2961 .owner = THIS_MODULE,
2962 };
2963
2964 static void hisi_sas_show_row_64(struct seq_file *s, int index,
2965 int sz, __le64 *ptr)
2966 {
2967 int i;
2968
2969 /* completion header size not fixed per HW version */
2970 seq_printf(s, "index %04d:\n\t", index);
2971 for (i = 1; i <= sz / 8; i++, ptr++) {
2972 seq_printf(s, " 0x%016llx", le64_to_cpu(*ptr));
2973 if (!(i % 2))
2974 seq_puts(s, "\n\t");
2975 }
2976
2977 seq_puts(s, "\n");
2978 }
2979
2980 static void hisi_sas_show_row_32(struct seq_file *s, int index,
2981 int sz, __le32 *ptr)
2982 {
2983 int i;
2984
2985 /* completion header size not fixed per HW version */
2986 seq_printf(s, "index %04d:\n\t", index);
2987 for (i = 1; i <= sz / 4; i++, ptr++) {
2988 seq_printf(s, " 0x%08x", le32_to_cpu(*ptr));
2989 if (!(i % 4))
2990 seq_puts(s, "\n\t");
2991 }
2992 seq_puts(s, "\n");
2993 }
2994
2995 static void hisi_sas_cq_show_slot(struct seq_file *s, int slot,
2996 struct hisi_sas_debugfs_cq *debugfs_cq)
2997 {
2998 struct hisi_sas_cq *cq = debugfs_cq->cq;
2999 struct hisi_hba *hisi_hba = cq->hisi_hba;
3000 __le32 *complete_hdr = debugfs_cq->complete_hdr +
3001 (hisi_hba->hw->complete_hdr_size * slot);
3002
3003 hisi_sas_show_row_32(s, slot,
3004 hisi_hba->hw->complete_hdr_size,
3005 complete_hdr);
3006 }
3007
3008 static int hisi_sas_debugfs_cq_show(struct seq_file *s, void *p)
3009 {
3010 struct hisi_sas_debugfs_cq *debugfs_cq = s->private;
3011 int slot;
3012
3013 for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
3014 hisi_sas_cq_show_slot(s, slot, debugfs_cq);
3015 }
3016 return 0;
3017 }
3018
3019 static int hisi_sas_debugfs_cq_open(struct inode *inode, struct file *filp)
3020 {
3021 return single_open(filp, hisi_sas_debugfs_cq_show, inode->i_private);
3022 }
3023
3024 static const struct file_operations hisi_sas_debugfs_cq_fops = {
3025 .open = hisi_sas_debugfs_cq_open,
3026 .read = seq_read,
3027 .llseek = seq_lseek,
3028 .release = single_release,
3029 .owner = THIS_MODULE,
3030 };
3031
3032 static void hisi_sas_dq_show_slot(struct seq_file *s, int slot, void *dq_ptr)
3033 {
3034 struct hisi_sas_debugfs_dq *debugfs_dq = dq_ptr;
3035 void *cmd_queue = debugfs_dq->hdr;
3036 __le32 *cmd_hdr = cmd_queue +
3037 sizeof(struct hisi_sas_cmd_hdr) * slot;
3038
3039 hisi_sas_show_row_32(s, slot, sizeof(struct hisi_sas_cmd_hdr), cmd_hdr);
3040 }
3041
3042 static int hisi_sas_debugfs_dq_show(struct seq_file *s, void *p)
3043 {
3044 int slot;
3045
3046 for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
3047 hisi_sas_dq_show_slot(s, slot, s->private);
3048 }
3049 return 0;
3050 }
3051
3052 static int hisi_sas_debugfs_dq_open(struct inode *inode, struct file *filp)
3053 {
3054 return single_open(filp, hisi_sas_debugfs_dq_show, inode->i_private);
3055 }
3056
3057 static const struct file_operations hisi_sas_debugfs_dq_fops = {
3058 .open = hisi_sas_debugfs_dq_open,
3059 .read = seq_read,
3060 .llseek = seq_lseek,
3061 .release = single_release,
3062 .owner = THIS_MODULE,
3063 };
3064
3065 static int hisi_sas_debugfs_iost_show(struct seq_file *s, void *p)
3066 {
3067 struct hisi_sas_debugfs_iost *debugfs_iost = s->private;
3068 struct hisi_sas_iost *iost = debugfs_iost->iost;
3069 int i, max_command_entries = HISI_SAS_MAX_COMMANDS;
3070
3071 for (i = 0; i < max_command_entries; i++, iost++) {
3072 __le64 *data = &iost->qw0;
3073
3074 hisi_sas_show_row_64(s, i, sizeof(*iost), data);
3075 }
3076
3077 return 0;
3078 }
3079
3080 static int hisi_sas_debugfs_iost_open(struct inode *inode, struct file *filp)
3081 {
3082 return single_open(filp, hisi_sas_debugfs_iost_show, inode->i_private);
3083 }
3084
3085 static const struct file_operations hisi_sas_debugfs_iost_fops = {
3086 .open = hisi_sas_debugfs_iost_open,
3087 .read = seq_read,
3088 .llseek = seq_lseek,
3089 .release = single_release,
3090 .owner = THIS_MODULE,
3091 };
3092
3093 static int hisi_sas_debugfs_iost_cache_show(struct seq_file *s, void *p)
3094 {
3095 struct hisi_sas_debugfs_iost_cache *debugfs_iost_cache = s->private;
3096 struct hisi_sas_iost_itct_cache *iost_cache = debugfs_iost_cache->cache;
3097 u32 cache_size = HISI_SAS_IOST_ITCT_CACHE_DW_SZ * 4;
3098 int i, tab_idx;
3099 __le64 *iost;
3100
3101 for (i = 0; i < HISI_SAS_IOST_ITCT_CACHE_NUM; i++, iost_cache++) {
3102 /*
3103 * Data struct of IOST cache:
3104 * Data[1]: BIT0~15: Table index
3105 * Bit16: Valid mask
3106 * Data[2]~[9]: IOST table
3107 */
3108 tab_idx = (iost_cache->data[1] & 0xffff);
3109 iost = (__le64 *)iost_cache;
3110
3111 hisi_sas_show_row_64(s, tab_idx, cache_size, iost);
3112 }
3113
3114 return 0;
3115 }
3116
3117 static int hisi_sas_debugfs_iost_cache_open(struct inode *inode,
3118 struct file *filp)
3119 {
3120 return single_open(filp, hisi_sas_debugfs_iost_cache_show,
3121 inode->i_private);
3122 }
3123
3124 static const struct file_operations hisi_sas_debugfs_iost_cache_fops = {
3125 .open = hisi_sas_debugfs_iost_cache_open,
3126 .read = seq_read,
3127 .llseek = seq_lseek,
3128 .release = single_release,
3129 .owner = THIS_MODULE,
3130 };
3131
3132 static int hisi_sas_debugfs_itct_show(struct seq_file *s, void *p)
3133 {
3134 int i;
3135 struct hisi_sas_debugfs_itct *debugfs_itct = s->private;
3136 struct hisi_sas_itct *itct = debugfs_itct->itct;
3137
3138 for (i = 0; i < HISI_SAS_MAX_ITCT_ENTRIES; i++, itct++) {
3139 __le64 *data = &itct->qw0;
3140
3141 hisi_sas_show_row_64(s, i, sizeof(*itct), data);
3142 }
3143
3144 return 0;
3145 }
3146
3147 static int hisi_sas_debugfs_itct_open(struct inode *inode, struct file *filp)
3148 {
3149 return single_open(filp, hisi_sas_debugfs_itct_show, inode->i_private);
3150 }
3151
3152 static const struct file_operations hisi_sas_debugfs_itct_fops = {
3153 .open = hisi_sas_debugfs_itct_open,
3154 .read = seq_read,
3155 .llseek = seq_lseek,
3156 .release = single_release,
3157 .owner = THIS_MODULE,
3158 };
3159
3160 static int hisi_sas_debugfs_itct_cache_show(struct seq_file *s, void *p)
3161 {
3162 struct hisi_sas_debugfs_itct_cache *debugfs_itct_cache = s->private;
3163 struct hisi_sas_iost_itct_cache *itct_cache = debugfs_itct_cache->cache;
3164 u32 cache_size = HISI_SAS_IOST_ITCT_CACHE_DW_SZ * 4;
3165 int i, tab_idx;
3166 __le64 *itct;
3167
3168 for (i = 0; i < HISI_SAS_IOST_ITCT_CACHE_NUM; i++, itct_cache++) {
3169 /*
3170 * Data struct of ITCT cache:
3171 * Data[1]: BIT0~15: Table index
3172 * Bit16: Valid mask
3173 * Data[2]~[9]: ITCT table
3174 */
3175 tab_idx = itct_cache->data[1] & 0xffff;
3176 itct = (__le64 *)itct_cache;
3177
3178 hisi_sas_show_row_64(s, tab_idx, cache_size, itct);
3179 }
3180
3181 return 0;
3182 }
3183
3184 static int hisi_sas_debugfs_itct_cache_open(struct inode *inode,
3185 struct file *filp)
3186 {
3187 return single_open(filp, hisi_sas_debugfs_itct_cache_show,
3188 inode->i_private);
3189 }
3190
3191 static const struct file_operations hisi_sas_debugfs_itct_cache_fops = {
3192 .open = hisi_sas_debugfs_itct_cache_open,
3193 .read = seq_read,
3194 .llseek = seq_lseek,
3195 .release = single_release,
3196 .owner = THIS_MODULE,
3197 };
3198
3199 static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
3200 {
3201 u64 *debugfs_timestamp;
3202 int dump_index = hisi_hba->debugfs_dump_index;
3203 struct dentry *dump_dentry;
3204 struct dentry *dentry;
3205 char name[256];
3206 int p;
3207 int c;
3208 int d;
3209
3210 snprintf(name, 256, "%d", dump_index);
3211
3212 dump_dentry = debugfs_create_dir(name, hisi_hba->debugfs_dump_dentry);
3213
3214 debugfs_timestamp = &hisi_hba->debugfs_timestamp[dump_index];
3215
3216 debugfs_create_u64("timestamp", 0400, dump_dentry,
3217 debugfs_timestamp);
3218
3219 debugfs_create_file("global", 0400, dump_dentry,
3220 &hisi_hba->debugfs_regs[dump_index][DEBUGFS_GLOBAL],
3221 &hisi_sas_debugfs_global_fops);
3222
3223 /* Create port dir and files */
3224 dentry = debugfs_create_dir("port", dump_dentry);
3225 for (p = 0; p < hisi_hba->n_phy; p++) {
3226 snprintf(name, 256, "%d", p);
3227
3228 debugfs_create_file(name, 0400, dentry,
3229 &hisi_hba->debugfs_port_reg[dump_index][p],
3230 &hisi_sas_debugfs_port_fops);
3231 }
3232
3233 /* Create CQ dir and files */
3234 dentry = debugfs_create_dir("cq", dump_dentry);
3235 for (c = 0; c < hisi_hba->queue_count; c++) {
3236 snprintf(name, 256, "%d", c);
3237
3238 debugfs_create_file(name, 0400, dentry,
3239 &hisi_hba->debugfs_cq[dump_index][c],
3240 &hisi_sas_debugfs_cq_fops);
3241 }
3242
3243 /* Create DQ dir and files */
3244 dentry = debugfs_create_dir("dq", dump_dentry);
3245 for (d = 0; d < hisi_hba->queue_count; d++) {
3246 snprintf(name, 256, "%d", d);
3247
3248 debugfs_create_file(name, 0400, dentry,
3249 &hisi_hba->debugfs_dq[dump_index][d],
3250 &hisi_sas_debugfs_dq_fops);
3251 }
3252
3253 debugfs_create_file("iost", 0400, dump_dentry,
3254 &hisi_hba->debugfs_iost[dump_index],
3255 &hisi_sas_debugfs_iost_fops);
3256
3257 debugfs_create_file("iost_cache", 0400, dump_dentry,
3258 &hisi_hba->debugfs_iost_cache[dump_index],
3259 &hisi_sas_debugfs_iost_cache_fops);
3260
3261 debugfs_create_file("itct", 0400, dump_dentry,
3262 &hisi_hba->debugfs_itct[dump_index],
3263 &hisi_sas_debugfs_itct_fops);
3264
3265 debugfs_create_file("itct_cache", 0400, dump_dentry,
3266 &hisi_hba->debugfs_itct_cache[dump_index],
3267 &hisi_sas_debugfs_itct_cache_fops);
3268
3269 debugfs_create_file("axi", 0400, dump_dentry,
3270 &hisi_hba->debugfs_regs[dump_index][DEBUGFS_AXI],
3271 &hisi_sas_debugfs_axi_fops);
3272
3273 debugfs_create_file("ras", 0400, dump_dentry,
3274 &hisi_hba->debugfs_regs[dump_index][DEBUGFS_RAS],
3275 &hisi_sas_debugfs_ras_fops);
3276
3277 return;
3278 }
3279
3280 static void hisi_sas_debugfs_snapshot_regs(struct hisi_hba *hisi_hba)
3281 {
3282 hisi_hba->hw->snapshot_prepare(hisi_hba);
3283
3284 hisi_sas_debugfs_snapshot_global_reg(hisi_hba);
3285 hisi_sas_debugfs_snapshot_port_reg(hisi_hba);
3286 hisi_sas_debugfs_snapshot_axi_reg(hisi_hba);
3287 hisi_sas_debugfs_snapshot_ras_reg(hisi_hba);
3288 hisi_sas_debugfs_snapshot_cq_reg(hisi_hba);
3289 hisi_sas_debugfs_snapshot_dq_reg(hisi_hba);
3290 hisi_sas_debugfs_snapshot_itct_reg(hisi_hba);
3291 hisi_sas_debugfs_snapshot_iost_reg(hisi_hba);
3292
3293 hisi_sas_debugfs_create_files(hisi_hba);
3294
3295 hisi_hba->hw->snapshot_restore(hisi_hba);
3296 }
3297
3298 static ssize_t hisi_sas_debugfs_trigger_dump_write(struct file *file,
3299 const char __user *user_buf,
3300 size_t count, loff_t *ppos)
3301 {
3302 struct hisi_hba *hisi_hba = file->f_inode->i_private;
3303 char buf[8];
3304
3305 if (hisi_hba->debugfs_dump_index >= hisi_sas_debugfs_dump_count)
3306 return -EFAULT;
3307
3308 if (count > 8)
3309 return -EFAULT;
3310
3311 if (copy_from_user(buf, user_buf, count))
3312 return -EFAULT;
3313
3314 if (buf[0] != '1')
3315 return -EFAULT;
3316
3317 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
3318
3319 return count;
3320 }
3321
3322 static const struct file_operations hisi_sas_debugfs_trigger_dump_fops = {
3323 .write = &hisi_sas_debugfs_trigger_dump_write,
3324 .owner = THIS_MODULE,
3325 };
3326
3327 enum {
3328 HISI_SAS_BIST_LOOPBACK_MODE_DIGITAL = 0,
3329 HISI_SAS_BIST_LOOPBACK_MODE_SERDES,
3330 HISI_SAS_BIST_LOOPBACK_MODE_REMOTE,
3331 };
3332
3333 enum {
3334 HISI_SAS_BIST_CODE_MODE_PRBS7 = 0,
3335 HISI_SAS_BIST_CODE_MODE_PRBS23,
3336 HISI_SAS_BIST_CODE_MODE_PRBS31,
3337 HISI_SAS_BIST_CODE_MODE_JTPAT,
3338 HISI_SAS_BIST_CODE_MODE_CJTPAT,
3339 HISI_SAS_BIST_CODE_MODE_SCRAMBED_0,
3340 HISI_SAS_BIST_CODE_MODE_TRAIN,
3341 HISI_SAS_BIST_CODE_MODE_TRAIN_DONE,
3342 HISI_SAS_BIST_CODE_MODE_HFTP,
3343 HISI_SAS_BIST_CODE_MODE_MFTP,
3344 HISI_SAS_BIST_CODE_MODE_LFTP,
3345 HISI_SAS_BIST_CODE_MODE_FIXED_DATA,
3346 };
3347
3348 static const struct {
3349 int value;
3350 char *name;
3351 } hisi_sas_debugfs_loop_linkrate[] = {
3352 { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
3353 { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
3354 { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
3355 { SAS_LINK_RATE_12_0_GBPS, "12.0 Gbit" },
3356 };
3357
3358 static int hisi_sas_debugfs_bist_linkrate_show(struct seq_file *s, void *p)
3359 {
3360 struct hisi_hba *hisi_hba = s->private;
3361 int i;
3362
3363 for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_linkrate); i++) {
3364 int match = (hisi_hba->debugfs_bist_linkrate ==
3365 hisi_sas_debugfs_loop_linkrate[i].value);
3366
3367 seq_printf(s, "%s%s%s ", match ? "[" : "",
3368 hisi_sas_debugfs_loop_linkrate[i].name,
3369 match ? "]" : "");
3370 }
3371 seq_puts(s, "\n");
3372
3373 return 0;
3374 }
3375
3376 static ssize_t hisi_sas_debugfs_bist_linkrate_write(struct file *filp,
3377 const char __user *buf,
3378 size_t count, loff_t *ppos)
3379 {
3380 struct seq_file *m = filp->private_data;
3381 struct hisi_hba *hisi_hba = m->private;
3382 char kbuf[16] = {}, *pkbuf;
3383 bool found = false;
3384 int i;
3385
3386 if (hisi_hba->debugfs_bist_enable)
3387 return -EPERM;
3388
3389 if (count >= sizeof(kbuf))
3390 return -EOVERFLOW;
3391
3392 if (copy_from_user(kbuf, buf, count))
3393 return -EINVAL;
3394
3395 pkbuf = strstrip(kbuf);
3396
3397 for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_linkrate); i++) {
3398 if (!strncmp(hisi_sas_debugfs_loop_linkrate[i].name,
3399 pkbuf, 16)) {
3400 hisi_hba->debugfs_bist_linkrate =
3401 hisi_sas_debugfs_loop_linkrate[i].value;
3402 found = true;
3403 break;
3404 }
3405 }
3406
3407 if (!found)
3408 return -EINVAL;
3409
3410 return count;
3411 }
3412
3413 static int hisi_sas_debugfs_bist_linkrate_open(struct inode *inode,
3414 struct file *filp)
3415 {
3416 return single_open(filp, hisi_sas_debugfs_bist_linkrate_show,
3417 inode->i_private);
3418 }
3419
3420 static const struct file_operations hisi_sas_debugfs_bist_linkrate_ops = {
3421 .open = hisi_sas_debugfs_bist_linkrate_open,
3422 .read = seq_read,
3423 .write = hisi_sas_debugfs_bist_linkrate_write,
3424 .llseek = seq_lseek,
3425 .release = single_release,
3426 .owner = THIS_MODULE,
3427 };
3428
3429 static const struct {
3430 int value;
3431 char *name;
3432 } hisi_sas_debugfs_loop_code_mode[] = {
3433 { HISI_SAS_BIST_CODE_MODE_PRBS7, "PRBS7" },
3434 { HISI_SAS_BIST_CODE_MODE_PRBS23, "PRBS23" },
3435 { HISI_SAS_BIST_CODE_MODE_PRBS31, "PRBS31" },
3436 { HISI_SAS_BIST_CODE_MODE_JTPAT, "JTPAT" },
3437 { HISI_SAS_BIST_CODE_MODE_CJTPAT, "CJTPAT" },
3438 { HISI_SAS_BIST_CODE_MODE_SCRAMBED_0, "SCRAMBED_0" },
3439 { HISI_SAS_BIST_CODE_MODE_TRAIN, "TRAIN" },
3440 { HISI_SAS_BIST_CODE_MODE_TRAIN_DONE, "TRAIN_DONE" },
3441 { HISI_SAS_BIST_CODE_MODE_HFTP, "HFTP" },
3442 { HISI_SAS_BIST_CODE_MODE_MFTP, "MFTP" },
3443 { HISI_SAS_BIST_CODE_MODE_LFTP, "LFTP" },
3444 { HISI_SAS_BIST_CODE_MODE_FIXED_DATA, "FIXED_DATA" },
3445 };
3446
3447 static int hisi_sas_debugfs_bist_code_mode_show(struct seq_file *s, void *p)
3448 {
3449 struct hisi_hba *hisi_hba = s->private;
3450 int i;
3451
3452 for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_code_mode); i++) {
3453 int match = (hisi_hba->debugfs_bist_code_mode ==
3454 hisi_sas_debugfs_loop_code_mode[i].value);
3455
3456 seq_printf(s, "%s%s%s ", match ? "[" : "",
3457 hisi_sas_debugfs_loop_code_mode[i].name,
3458 match ? "]" : "");
3459 }
3460 seq_puts(s, "\n");
3461
3462 return 0;
3463 }
3464
3465 static ssize_t hisi_sas_debugfs_bist_code_mode_write(struct file *filp,
3466 const char __user *buf,
3467 size_t count,
3468 loff_t *ppos)
3469 {
3470 struct seq_file *m = filp->private_data;
3471 struct hisi_hba *hisi_hba = m->private;
3472 char kbuf[16] = {}, *pkbuf;
3473 bool found = false;
3474 int i;
3475
3476 if (hisi_hba->debugfs_bist_enable)
3477 return -EPERM;
3478
3479 if (count >= sizeof(kbuf))
3480 return -EINVAL;
3481
3482 if (copy_from_user(kbuf, buf, count))
3483 return -EOVERFLOW;
3484
3485 pkbuf = strstrip(kbuf);
3486
3487 for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_code_mode); i++) {
3488 if (!strncmp(hisi_sas_debugfs_loop_code_mode[i].name,
3489 pkbuf, 16)) {
3490 hisi_hba->debugfs_bist_code_mode =
3491 hisi_sas_debugfs_loop_code_mode[i].value;
3492 found = true;
3493 break;
3494 }
3495 }
3496
3497 if (!found)
3498 return -EINVAL;
3499
3500 return count;
3501 }
3502
3503 static int hisi_sas_debugfs_bist_code_mode_open(struct inode *inode,
3504 struct file *filp)
3505 {
3506 return single_open(filp, hisi_sas_debugfs_bist_code_mode_show,
3507 inode->i_private);
3508 }
3509
3510 static const struct file_operations hisi_sas_debugfs_bist_code_mode_ops = {
3511 .open = hisi_sas_debugfs_bist_code_mode_open,
3512 .read = seq_read,
3513 .write = hisi_sas_debugfs_bist_code_mode_write,
3514 .llseek = seq_lseek,
3515 .release = single_release,
3516 .owner = THIS_MODULE,
3517 };
3518
3519 static ssize_t hisi_sas_debugfs_bist_phy_write(struct file *filp,
3520 const char __user *buf,
3521 size_t count, loff_t *ppos)
3522 {
3523 struct seq_file *m = filp->private_data;
3524 struct hisi_hba *hisi_hba = m->private;
3525 unsigned int phy_no;
3526 int val;
3527
3528 if (hisi_hba->debugfs_bist_enable)
3529 return -EPERM;
3530
3531 val = kstrtouint_from_user(buf, count, 0, &phy_no);
3532 if (val)
3533 return val;
3534
3535 if (phy_no >= hisi_hba->n_phy)
3536 return -EINVAL;
3537
3538 hisi_hba->debugfs_bist_phy_no = phy_no;
3539
3540 return count;
3541 }
3542
3543 static int hisi_sas_debugfs_bist_phy_show(struct seq_file *s, void *p)
3544 {
3545 struct hisi_hba *hisi_hba = s->private;
3546
3547 seq_printf(s, "%d\n", hisi_hba->debugfs_bist_phy_no);
3548
3549 return 0;
3550 }
3551
3552 static int hisi_sas_debugfs_bist_phy_open(struct inode *inode,
3553 struct file *filp)
3554 {
3555 return single_open(filp, hisi_sas_debugfs_bist_phy_show,
3556 inode->i_private);
3557 }
3558
3559 static const struct file_operations hisi_sas_debugfs_bist_phy_ops = {
3560 .open = hisi_sas_debugfs_bist_phy_open,
3561 .read = seq_read,
3562 .write = hisi_sas_debugfs_bist_phy_write,
3563 .llseek = seq_lseek,
3564 .release = single_release,
3565 .owner = THIS_MODULE,
3566 };
3567
3568 static const struct {
3569 int value;
3570 char *name;
3571 } hisi_sas_debugfs_loop_modes[] = {
3572 { HISI_SAS_BIST_LOOPBACK_MODE_DIGITAL, "digital" },
3573 { HISI_SAS_BIST_LOOPBACK_MODE_SERDES, "serdes" },
3574 { HISI_SAS_BIST_LOOPBACK_MODE_REMOTE, "remote" },
3575 };
3576
3577 static int hisi_sas_debugfs_bist_mode_show(struct seq_file *s, void *p)
3578 {
3579 struct hisi_hba *hisi_hba = s->private;
3580 int i;
3581
3582 for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_modes); i++) {
3583 int match = (hisi_hba->debugfs_bist_mode ==
3584 hisi_sas_debugfs_loop_modes[i].value);
3585
3586 seq_printf(s, "%s%s%s ", match ? "[" : "",
3587 hisi_sas_debugfs_loop_modes[i].name,
3588 match ? "]" : "");
3589 }
3590 seq_puts(s, "\n");
3591
3592 return 0;
3593 }
3594
3595 static ssize_t hisi_sas_debugfs_bist_mode_write(struct file *filp,
3596 const char __user *buf,
3597 size_t count, loff_t *ppos)
3598 {
3599 struct seq_file *m = filp->private_data;
3600 struct hisi_hba *hisi_hba = m->private;
3601 char kbuf[16] = {}, *pkbuf;
3602 bool found = false;
3603 int i;
3604
3605 if (hisi_hba->debugfs_bist_enable)
3606 return -EPERM;
3607
3608 if (count >= sizeof(kbuf))
3609 return -EINVAL;
3610
3611 if (copy_from_user(kbuf, buf, count))
3612 return -EOVERFLOW;
3613
3614 pkbuf = strstrip(kbuf);
3615
3616 for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_modes); i++) {
3617 if (!strncmp(hisi_sas_debugfs_loop_modes[i].name, pkbuf, 16)) {
3618 hisi_hba->debugfs_bist_mode =
3619 hisi_sas_debugfs_loop_modes[i].value;
3620 found = true;
3621 break;
3622 }
3623 }
3624
3625 if (!found)
3626 return -EINVAL;
3627
3628 return count;
3629 }
3630
3631 static int hisi_sas_debugfs_bist_mode_open(struct inode *inode,
3632 struct file *filp)
3633 {
3634 return single_open(filp, hisi_sas_debugfs_bist_mode_show,
3635 inode->i_private);
3636 }
3637
3638 static const struct file_operations hisi_sas_debugfs_bist_mode_ops = {
3639 .open = hisi_sas_debugfs_bist_mode_open,
3640 .read = seq_read,
3641 .write = hisi_sas_debugfs_bist_mode_write,
3642 .llseek = seq_lseek,
3643 .release = single_release,
3644 .owner = THIS_MODULE,
3645 };
3646
3647 static ssize_t hisi_sas_debugfs_bist_enable_write(struct file *filp,
3648 const char __user *buf,
3649 size_t count, loff_t *ppos)
3650 {
3651 struct seq_file *m = filp->private_data;
3652 struct hisi_hba *hisi_hba = m->private;
3653 unsigned int enable;
3654 int val;
3655
3656 val = kstrtouint_from_user(buf, count, 0, &enable);
3657 if (val)
3658 return val;
3659
3660 if (enable > 1)
3661 return -EINVAL;
3662
3663 if (enable == hisi_hba->debugfs_bist_enable)
3664 return count;
3665
3666 if (!hisi_hba->hw->set_bist)
3667 return -EPERM;
3668
3669 val = hisi_hba->hw->set_bist(hisi_hba, enable);
3670 if (val < 0)
3671 return val;
3672
3673 hisi_hba->debugfs_bist_enable = enable;
3674
3675 return count;
3676 }
3677
3678 static int hisi_sas_debugfs_bist_enable_show(struct seq_file *s, void *p)
3679 {
3680 struct hisi_hba *hisi_hba = s->private;
3681
3682 seq_printf(s, "%d\n", hisi_hba->debugfs_bist_enable);
3683
3684 return 0;
3685 }
3686
3687 static int hisi_sas_debugfs_bist_enable_open(struct inode *inode,
3688 struct file *filp)
3689 {
3690 return single_open(filp, hisi_sas_debugfs_bist_enable_show,
3691 inode->i_private);
3692 }
3693
3694 static const struct file_operations hisi_sas_debugfs_bist_enable_ops = {
3695 .open = hisi_sas_debugfs_bist_enable_open,
3696 .read = seq_read,
3697 .write = hisi_sas_debugfs_bist_enable_write,
3698 .llseek = seq_lseek,
3699 .release = single_release,
3700 .owner = THIS_MODULE,
3701 };
3702
3703 static ssize_t hisi_sas_debugfs_phy_down_cnt_write(struct file *filp,
3704 const char __user *buf,
3705 size_t count, loff_t *ppos)
3706 {
3707 struct seq_file *s = filp->private_data;
3708 struct hisi_sas_phy *phy = s->private;
3709 unsigned int set_val;
3710 int res;
3711
3712 res = kstrtouint_from_user(buf, count, 0, &set_val);
3713 if (res)
3714 return res;
3715
3716 if (set_val > 0)
3717 return -EINVAL;
3718
3719 atomic_set(&phy->down_cnt, 0);
3720
3721 return count;
3722 }
3723
3724 static int hisi_sas_debugfs_phy_down_cnt_show(struct seq_file *s, void *p)
3725 {
3726 struct hisi_sas_phy *phy = s->private;
3727
3728 seq_printf(s, "%d\n", atomic_read(&phy->down_cnt));
3729
3730 return 0;
3731 }
3732
3733 static int hisi_sas_debugfs_phy_down_cnt_open(struct inode *inode,
3734 struct file *filp)
3735 {
3736 return single_open(filp, hisi_sas_debugfs_phy_down_cnt_show,
3737 inode->i_private);
3738 }
3739
3740 static const struct file_operations hisi_sas_debugfs_phy_down_cnt_ops = {
3741 .open = hisi_sas_debugfs_phy_down_cnt_open,
3742 .read = seq_read,
3743 .write = hisi_sas_debugfs_phy_down_cnt_write,
3744 .llseek = seq_lseek,
3745 .release = single_release,
3746 .owner = THIS_MODULE,
3747 };
3748
3749 void hisi_sas_debugfs_work_handler(struct work_struct *work)
3750 {
3751 struct hisi_hba *hisi_hba =
3752 container_of(work, struct hisi_hba, debugfs_work);
3753 int debugfs_dump_index = hisi_hba->debugfs_dump_index;
3754 struct device *dev = hisi_hba->dev;
3755 u64 timestamp = local_clock();
3756
3757 if (debugfs_dump_index >= hisi_sas_debugfs_dump_count) {
3758 dev_warn(dev, "dump count exceeded!\n");
3759 return;
3760 }
3761
3762 do_div(timestamp, NSEC_PER_MSEC);
3763 hisi_hba->debugfs_timestamp[debugfs_dump_index] = timestamp;
3764
3765 hisi_sas_debugfs_snapshot_regs(hisi_hba);
3766 hisi_hba->debugfs_dump_index++;
3767 }
3768 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_work_handler);
3769
3770 static void hisi_sas_debugfs_release(struct hisi_hba *hisi_hba, int dump_index)
3771 {
3772 struct device *dev = hisi_hba->dev;
3773 int i;
3774
3775 devm_kfree(dev, hisi_hba->debugfs_iost_cache[dump_index].cache);
3776 devm_kfree(dev, hisi_hba->debugfs_itct_cache[dump_index].cache);
3777 devm_kfree(dev, hisi_hba->debugfs_iost[dump_index].iost);
3778 devm_kfree(dev, hisi_hba->debugfs_itct[dump_index].itct);
3779
3780 for (i = 0; i < hisi_hba->queue_count; i++)
3781 devm_kfree(dev, hisi_hba->debugfs_dq[dump_index][i].hdr);
3782
3783 for (i = 0; i < hisi_hba->queue_count; i++)
3784 devm_kfree(dev,
3785 hisi_hba->debugfs_cq[dump_index][i].complete_hdr);
3786
3787 for (i = 0; i < DEBUGFS_REGS_NUM; i++)
3788 devm_kfree(dev, hisi_hba->debugfs_regs[dump_index][i].data);
3789
3790 for (i = 0; i < hisi_hba->n_phy; i++)
3791 devm_kfree(dev, hisi_hba->debugfs_port_reg[dump_index][i].data);
3792 }
3793
3794 static int hisi_sas_debugfs_alloc(struct hisi_hba *hisi_hba, int dump_index)
3795 {
3796 const struct hisi_sas_hw *hw = hisi_hba->hw;
3797 struct device *dev = hisi_hba->dev;
3798 int p, c, d, r, i;
3799 size_t sz;
3800
3801 for (r = 0; r < DEBUGFS_REGS_NUM; r++) {
3802 struct hisi_sas_debugfs_regs *regs =
3803 &hisi_hba->debugfs_regs[dump_index][r];
3804
3805 sz = hw->debugfs_reg_array[r]->count * 4;
3806 regs->data = devm_kmalloc(dev, sz, GFP_KERNEL);
3807 if (!regs->data)
3808 goto fail;
3809 regs->hisi_hba = hisi_hba;
3810 }
3811
3812 sz = hw->debugfs_reg_port->count * 4;
3813 for (p = 0; p < hisi_hba->n_phy; p++) {
3814 struct hisi_sas_debugfs_port *port =
3815 &hisi_hba->debugfs_port_reg[dump_index][p];
3816
3817 port->data = devm_kmalloc(dev, sz, GFP_KERNEL);
3818 if (!port->data)
3819 goto fail;
3820 port->phy = &hisi_hba->phy[p];
3821 }
3822
3823 sz = hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
3824 for (c = 0; c < hisi_hba->queue_count; c++) {
3825 struct hisi_sas_debugfs_cq *cq =
3826 &hisi_hba->debugfs_cq[dump_index][c];
3827
3828 cq->complete_hdr = devm_kmalloc(dev, sz, GFP_KERNEL);
3829 if (!cq->complete_hdr)
3830 goto fail;
3831 cq->cq = &hisi_hba->cq[c];
3832 }
3833
3834 sz = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
3835 for (d = 0; d < hisi_hba->queue_count; d++) {
3836 struct hisi_sas_debugfs_dq *dq =
3837 &hisi_hba->debugfs_dq[dump_index][d];
3838
3839 dq->hdr = devm_kmalloc(dev, sz, GFP_KERNEL);
3840 if (!dq->hdr)
3841 goto fail;
3842 dq->dq = &hisi_hba->dq[d];
3843 }
3844
3845 sz = HISI_SAS_MAX_COMMANDS * sizeof(struct hisi_sas_iost);
3846
3847 hisi_hba->debugfs_iost[dump_index].iost =
3848 devm_kmalloc(dev, sz, GFP_KERNEL);
3849 if (!hisi_hba->debugfs_iost[dump_index].iost)
3850 goto fail;
3851
3852 sz = HISI_SAS_IOST_ITCT_CACHE_NUM *
3853 sizeof(struct hisi_sas_iost_itct_cache);
3854
3855 hisi_hba->debugfs_iost_cache[dump_index].cache =
3856 devm_kmalloc(dev, sz, GFP_KERNEL);
3857 if (!hisi_hba->debugfs_iost_cache[dump_index].cache)
3858 goto fail;
3859
3860 sz = HISI_SAS_IOST_ITCT_CACHE_NUM *
3861 sizeof(struct hisi_sas_iost_itct_cache);
3862
3863 hisi_hba->debugfs_itct_cache[dump_index].cache =
3864 devm_kmalloc(dev, sz, GFP_KERNEL);
3865 if (!hisi_hba->debugfs_itct_cache[dump_index].cache)
3866 goto fail;
3867
3868 /* New memory allocation must be locate before itct */
3869 sz = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
3870
3871 hisi_hba->debugfs_itct[dump_index].itct =
3872 devm_kmalloc(dev, sz, GFP_KERNEL);
3873 if (!hisi_hba->debugfs_itct[dump_index].itct)
3874 goto fail;
3875
3876 return 0;
3877 fail:
3878 for (i = 0; i < hisi_sas_debugfs_dump_count; i++)
3879 hisi_sas_debugfs_release(hisi_hba, i);
3880 return -ENOMEM;
3881 }
3882
3883 static void hisi_sas_debugfs_phy_down_cnt_init(struct hisi_hba *hisi_hba)
3884 {
3885 struct dentry *dir = debugfs_create_dir("phy_down_cnt",
3886 hisi_hba->debugfs_dir);
3887 char name[16];
3888 int phy_no;
3889
3890 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
3891 snprintf(name, 16, "%d", phy_no);
3892 debugfs_create_file(name, 0600, dir,
3893 &hisi_hba->phy[phy_no],
3894 &hisi_sas_debugfs_phy_down_cnt_ops);
3895 }
3896 }
3897
3898 static void hisi_sas_debugfs_bist_init(struct hisi_hba *hisi_hba)
3899 {
3900 hisi_hba->debugfs_bist_dentry =
3901 debugfs_create_dir("bist", hisi_hba->debugfs_dir);
3902 debugfs_create_file("link_rate", 0600,
3903 hisi_hba->debugfs_bist_dentry, hisi_hba,
3904 &hisi_sas_debugfs_bist_linkrate_ops);
3905
3906 debugfs_create_file("code_mode", 0600,
3907 hisi_hba->debugfs_bist_dentry, hisi_hba,
3908 &hisi_sas_debugfs_bist_code_mode_ops);
3909
3910 debugfs_create_file("phy_id", 0600, hisi_hba->debugfs_bist_dentry,
3911 hisi_hba, &hisi_sas_debugfs_bist_phy_ops);
3912
3913 debugfs_create_u32("cnt", 0600, hisi_hba->debugfs_bist_dentry,
3914 &hisi_hba->debugfs_bist_cnt);
3915
3916 debugfs_create_file("loopback_mode", 0600,
3917 hisi_hba->debugfs_bist_dentry,
3918 hisi_hba, &hisi_sas_debugfs_bist_mode_ops);
3919
3920 debugfs_create_file("enable", 0600, hisi_hba->debugfs_bist_dentry,
3921 hisi_hba, &hisi_sas_debugfs_bist_enable_ops);
3922
3923 hisi_hba->debugfs_bist_linkrate = SAS_LINK_RATE_1_5_GBPS;
3924 }
3925
3926 void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba)
3927 {
3928 struct device *dev = hisi_hba->dev;
3929 int i;
3930
3931 hisi_hba->debugfs_dir = debugfs_create_dir(dev_name(dev),
3932 hisi_sas_debugfs_dir);
3933 debugfs_create_file("trigger_dump", 0200,
3934 hisi_hba->debugfs_dir,
3935 hisi_hba,
3936 &hisi_sas_debugfs_trigger_dump_fops);
3937
3938 /* create bist structures */
3939 hisi_sas_debugfs_bist_init(hisi_hba);
3940
3941 hisi_hba->debugfs_dump_dentry =
3942 debugfs_create_dir("dump", hisi_hba->debugfs_dir);
3943
3944 hisi_sas_debugfs_phy_down_cnt_init(hisi_hba);
3945
3946 for (i = 0; i < hisi_sas_debugfs_dump_count; i++) {
3947 if (hisi_sas_debugfs_alloc(hisi_hba, i)) {
3948 debugfs_remove_recursive(hisi_hba->debugfs_dir);
3949 dev_dbg(dev, "failed to init debugfs!\n");
3950 break;
3951 }
3952 }
3953 }
3954 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_init);
3955
3956 void hisi_sas_debugfs_exit(struct hisi_hba *hisi_hba)
3957 {
3958 debugfs_remove_recursive(hisi_hba->debugfs_dir);
3959 }
3960 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_exit);
3961
3962 int hisi_sas_remove(struct platform_device *pdev)
3963 {
3964 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
3965 struct hisi_hba *hisi_hba = sha->lldd_ha;
3966 struct Scsi_Host *shost = sha->core.shost;
3967
3968 if (timer_pending(&hisi_hba->timer))
3969 del_timer(&hisi_hba->timer);
3970
3971 sas_unregister_ha(sha);
3972 sas_remove_host(sha->core.shost);
3973
3974 hisi_sas_free(hisi_hba);
3975 scsi_host_put(shost);
3976 return 0;
3977 }
3978 EXPORT_SYMBOL_GPL(hisi_sas_remove);
3979
3980 bool hisi_sas_debugfs_enable;
3981 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
3982 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
3983 MODULE_PARM_DESC(hisi_sas_debugfs_enable, "Enable driver debugfs (default disabled)");
3984
3985 u32 hisi_sas_debugfs_dump_count = 1;
3986 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
3987 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
3988 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
3989
3990 static __init int hisi_sas_init(void)
3991 {
3992 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
3993 if (!hisi_sas_stt)
3994 return -ENOMEM;
3995
3996 if (hisi_sas_debugfs_enable) {
3997 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
3998 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
3999 pr_info("hisi_sas: Limiting debugfs dump count\n");
4000 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
4001 }
4002 }
4003
4004 return 0;
4005 }
4006
4007 static __exit void hisi_sas_exit(void)
4008 {
4009 sas_release_transport(hisi_sas_stt);
4010
4011 debugfs_remove(hisi_sas_debugfs_dir);
4012 }
4013
4014 module_init(hisi_sas_init);
4015 module_exit(hisi_sas_exit);
4016
4017 MODULE_LICENSE("GPL");
4018 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
4019 MODULE_DESCRIPTION("HISILICON SAS controller driver");
4020 MODULE_ALIAS("platform:" DRV_NAME);
Linux with added FPC-III support