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LiteX: driver for MMCM
[linux/fpc-iii.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
blobcf0bfac920a8181d0c51c14d5ba67730a1957f7d
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2015 Linaro Ltd.
4 * Copyright (c) 2015 Hisilicon Limited.
5 */
6
7 #include "hisi_sas.h"
8 #define DRV_NAME "hisi_sas"
9
10 #define DEV_IS_GONE(dev) \
11 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
12
13 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
14 u8 *lun, struct hisi_sas_tmf_task *tmf);
15 static int
16 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
17 struct domain_device *device,
18 int abort_flag, int tag);
19 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
20 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
21 void *funcdata);
22 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
23 struct domain_device *device);
24 static void hisi_sas_dev_gone(struct domain_device *device);
25
26 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
27 {
28 switch (fis->command) {
29 case ATA_CMD_FPDMA_WRITE:
30 case ATA_CMD_FPDMA_READ:
31 case ATA_CMD_FPDMA_RECV:
32 case ATA_CMD_FPDMA_SEND:
33 case ATA_CMD_NCQ_NON_DATA:
34 return HISI_SAS_SATA_PROTOCOL_FPDMA;
35
36 case ATA_CMD_DOWNLOAD_MICRO:
37 case ATA_CMD_ID_ATA:
38 case ATA_CMD_PMP_READ:
39 case ATA_CMD_READ_LOG_EXT:
40 case ATA_CMD_PIO_READ:
41 case ATA_CMD_PIO_READ_EXT:
42 case ATA_CMD_PMP_WRITE:
43 case ATA_CMD_WRITE_LOG_EXT:
44 case ATA_CMD_PIO_WRITE:
45 case ATA_CMD_PIO_WRITE_EXT:
46 return HISI_SAS_SATA_PROTOCOL_PIO;
47
48 case ATA_CMD_DSM:
49 case ATA_CMD_DOWNLOAD_MICRO_DMA:
50 case ATA_CMD_PMP_READ_DMA:
51 case ATA_CMD_PMP_WRITE_DMA:
52 case ATA_CMD_READ:
53 case ATA_CMD_READ_EXT:
54 case ATA_CMD_READ_LOG_DMA_EXT:
55 case ATA_CMD_READ_STREAM_DMA_EXT:
56 case ATA_CMD_TRUSTED_RCV_DMA:
57 case ATA_CMD_TRUSTED_SND_DMA:
58 case ATA_CMD_WRITE:
59 case ATA_CMD_WRITE_EXT:
60 case ATA_CMD_WRITE_FUA_EXT:
61 case ATA_CMD_WRITE_QUEUED:
62 case ATA_CMD_WRITE_LOG_DMA_EXT:
63 case ATA_CMD_WRITE_STREAM_DMA_EXT:
64 case ATA_CMD_ZAC_MGMT_IN:
65 return HISI_SAS_SATA_PROTOCOL_DMA;
66
67 case ATA_CMD_CHK_POWER:
68 case ATA_CMD_DEV_RESET:
69 case ATA_CMD_EDD:
70 case ATA_CMD_FLUSH:
71 case ATA_CMD_FLUSH_EXT:
72 case ATA_CMD_VERIFY:
73 case ATA_CMD_VERIFY_EXT:
74 case ATA_CMD_SET_FEATURES:
75 case ATA_CMD_STANDBY:
76 case ATA_CMD_STANDBYNOW1:
77 case ATA_CMD_ZAC_MGMT_OUT:
78 return HISI_SAS_SATA_PROTOCOL_NONDATA;
79
80 case ATA_CMD_SET_MAX:
81 switch (fis->features) {
82 case ATA_SET_MAX_PASSWD:
83 case ATA_SET_MAX_LOCK:
84 return HISI_SAS_SATA_PROTOCOL_PIO;
85
86 case ATA_SET_MAX_PASSWD_DMA:
87 case ATA_SET_MAX_UNLOCK_DMA:
88 return HISI_SAS_SATA_PROTOCOL_DMA;
89
90 default:
91 return HISI_SAS_SATA_PROTOCOL_NONDATA;
92 }
93
94 default:
95 {
96 if (direction == DMA_NONE)
97 return HISI_SAS_SATA_PROTOCOL_NONDATA;
98 return HISI_SAS_SATA_PROTOCOL_PIO;
99 }
100 }
101 }
102 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
103
104 void hisi_sas_sata_done(struct sas_task *task,
105 struct hisi_sas_slot *slot)
106 {
107 struct task_status_struct *ts = &task->task_status;
108 struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
109 struct hisi_sas_status_buffer *status_buf =
110 hisi_sas_status_buf_addr_mem(slot);
111 u8 *iu = &status_buf->iu[0];
112 struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu;
113
114 resp->frame_len = sizeof(struct dev_to_host_fis);
115 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
116
117 ts->buf_valid_size = sizeof(*resp);
118 }
119 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
120
121 /*
122 * This function assumes linkrate mask fits in 8 bits, which it
123 * does for all HW versions supported.
124 */
125 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
126 {
127 u8 rate = 0;
128 int i;
129
130 max -= SAS_LINK_RATE_1_5_GBPS;
131 for (i = 0; i <= max; i++)
132 rate |= 1 << (i * 2);
133 return rate;
134 }
135 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
136
137 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
138 {
139 return device->port->ha->lldd_ha;
140 }
141
142 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
143 {
144 return container_of(sas_port, struct hisi_sas_port, sas_port);
145 }
146 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
147
148 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
149 {
150 int phy_no;
151
152 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
153 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
154 }
155 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
156
157 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
158 {
159 void *bitmap = hisi_hba->slot_index_tags;
160
161 clear_bit(slot_idx, bitmap);
162 }
163
164 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
165 {
166 if (hisi_hba->hw->slot_index_alloc ||
167 slot_idx >= HISI_SAS_UNRESERVED_IPTT) {
168 spin_lock(&hisi_hba->lock);
169 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
170 spin_unlock(&hisi_hba->lock);
171 }
172 }
173
174 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
175 {
176 void *bitmap = hisi_hba->slot_index_tags;
177
178 set_bit(slot_idx, bitmap);
179 }
180
181 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
182 struct scsi_cmnd *scsi_cmnd)
183 {
184 int index;
185 void *bitmap = hisi_hba->slot_index_tags;
186
187 if (scsi_cmnd)
188 return scsi_cmnd->request->tag;
189
190 spin_lock(&hisi_hba->lock);
191 index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
192 hisi_hba->last_slot_index + 1);
193 if (index >= hisi_hba->slot_index_count) {
194 index = find_next_zero_bit(bitmap,
195 hisi_hba->slot_index_count,
196 HISI_SAS_UNRESERVED_IPTT);
197 if (index >= hisi_hba->slot_index_count) {
198 spin_unlock(&hisi_hba->lock);
199 return -SAS_QUEUE_FULL;
200 }
201 }
202 hisi_sas_slot_index_set(hisi_hba, index);
203 hisi_hba->last_slot_index = index;
204 spin_unlock(&hisi_hba->lock);
205
206 return index;
207 }
208
209 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
210 {
211 int i;
212
213 for (i = 0; i < hisi_hba->slot_index_count; ++i)
214 hisi_sas_slot_index_clear(hisi_hba, i);
215 }
216
217 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
218 struct hisi_sas_slot *slot)
219 {
220 int device_id = slot->device_id;
221 struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
222
223 if (task) {
224 struct device *dev = hisi_hba->dev;
225
226 if (!task->lldd_task)
227 return;
228
229 task->lldd_task = NULL;
230
231 if (!sas_protocol_ata(task->task_proto)) {
232 if (slot->n_elem)
233 dma_unmap_sg(dev, task->scatter,
234 task->num_scatter,
235 task->data_dir);
236 if (slot->n_elem_dif) {
237 struct sas_ssp_task *ssp_task = &task->ssp_task;
238 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
239
240 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
241 scsi_prot_sg_count(scsi_cmnd),
242 task->data_dir);
243 }
244 }
245 }
246
247 spin_lock(&sas_dev->lock);
248 list_del_init(&slot->entry);
249 spin_unlock(&sas_dev->lock);
250
251 memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
252
253 hisi_sas_slot_index_free(hisi_hba, slot->idx);
254 }
255 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
256
257 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
258 struct hisi_sas_slot *slot)
259 {
260 hisi_hba->hw->prep_smp(hisi_hba, slot);
261 }
262
263 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
264 struct hisi_sas_slot *slot)
265 {
266 hisi_hba->hw->prep_ssp(hisi_hba, slot);
267 }
268
269 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
270 struct hisi_sas_slot *slot)
271 {
272 hisi_hba->hw->prep_stp(hisi_hba, slot);
273 }
274
275 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
276 struct hisi_sas_slot *slot,
277 int device_id, int abort_flag, int tag_to_abort)
278 {
279 hisi_hba->hw->prep_abort(hisi_hba, slot,
280 device_id, abort_flag, tag_to_abort);
281 }
282
283 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
284 struct sas_task *task, int n_elem,
285 int n_elem_req)
286 {
287 struct device *dev = hisi_hba->dev;
288
289 if (!sas_protocol_ata(task->task_proto)) {
290 if (task->num_scatter) {
291 if (n_elem)
292 dma_unmap_sg(dev, task->scatter,
293 task->num_scatter,
294 task->data_dir);
295 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
296 if (n_elem_req)
297 dma_unmap_sg(dev, &task->smp_task.smp_req,
298 1, DMA_TO_DEVICE);
299 }
300 }
301 }
302
303 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
304 struct sas_task *task, int *n_elem,
305 int *n_elem_req)
306 {
307 struct device *dev = hisi_hba->dev;
308 int rc;
309
310 if (sas_protocol_ata(task->task_proto)) {
311 *n_elem = task->num_scatter;
312 } else {
313 unsigned int req_len;
314
315 if (task->num_scatter) {
316 *n_elem = dma_map_sg(dev, task->scatter,
317 task->num_scatter, task->data_dir);
318 if (!*n_elem) {
319 rc = -ENOMEM;
320 goto prep_out;
321 }
322 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
323 *n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
324 1, DMA_TO_DEVICE);
325 if (!*n_elem_req) {
326 rc = -ENOMEM;
327 goto prep_out;
328 }
329 req_len = sg_dma_len(&task->smp_task.smp_req);
330 if (req_len & 0x3) {
331 rc = -EINVAL;
332 goto err_out_dma_unmap;
333 }
334 }
335 }
336
337 if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
338 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
339 *n_elem);
340 rc = -EINVAL;
341 goto err_out_dma_unmap;
342 }
343 return 0;
344
345 err_out_dma_unmap:
346 /* It would be better to call dma_unmap_sg() here, but it's messy */
347 hisi_sas_dma_unmap(hisi_hba, task, *n_elem,
348 *n_elem_req);
349 prep_out:
350 return rc;
351 }
352
353 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
354 struct sas_task *task, int n_elem_dif)
355 {
356 struct device *dev = hisi_hba->dev;
357
358 if (n_elem_dif) {
359 struct sas_ssp_task *ssp_task = &task->ssp_task;
360 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
361
362 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
363 scsi_prot_sg_count(scsi_cmnd),
364 task->data_dir);
365 }
366 }
367
368 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
369 int *n_elem_dif, struct sas_task *task)
370 {
371 struct device *dev = hisi_hba->dev;
372 struct sas_ssp_task *ssp_task;
373 struct scsi_cmnd *scsi_cmnd;
374 int rc;
375
376 if (task->num_scatter) {
377 ssp_task = &task->ssp_task;
378 scsi_cmnd = ssp_task->cmd;
379
380 if (scsi_prot_sg_count(scsi_cmnd)) {
381 *n_elem_dif = dma_map_sg(dev,
382 scsi_prot_sglist(scsi_cmnd),
383 scsi_prot_sg_count(scsi_cmnd),
384 task->data_dir);
385
386 if (!*n_elem_dif)
387 return -ENOMEM;
388
389 if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
390 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
391 *n_elem_dif);
392 rc = -EINVAL;
393 goto err_out_dif_dma_unmap;
394 }
395 }
396 }
397
398 return 0;
399
400 err_out_dif_dma_unmap:
401 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
402 scsi_prot_sg_count(scsi_cmnd), task->data_dir);
403 return rc;
404 }
405
406 static int hisi_sas_task_prep(struct sas_task *task,
407 struct hisi_sas_dq **dq_pointer,
408 bool is_tmf, struct hisi_sas_tmf_task *tmf,
409 int *pass)
410 {
411 struct domain_device *device = task->dev;
412 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
413 struct hisi_sas_device *sas_dev = device->lldd_dev;
414 struct hisi_sas_port *port;
415 struct hisi_sas_slot *slot;
416 struct hisi_sas_cmd_hdr *cmd_hdr_base;
417 struct asd_sas_port *sas_port = device->port;
418 struct device *dev = hisi_hba->dev;
419 int dlvry_queue_slot, dlvry_queue, rc, slot_idx;
420 int n_elem = 0, n_elem_dif = 0, n_elem_req = 0;
421 struct scsi_cmnd *scmd = NULL;
422 struct hisi_sas_dq *dq;
423 unsigned long flags;
424 int wr_q_index;
425
426 if (DEV_IS_GONE(sas_dev)) {
427 if (sas_dev)
428 dev_info(dev, "task prep: device %d not ready\n",
429 sas_dev->device_id);
430 else
431 dev_info(dev, "task prep: device %016llx not ready\n",
432 SAS_ADDR(device->sas_addr));
433
434 return -ECOMM;
435 }
436
437 if (task->uldd_task) {
438 struct ata_queued_cmd *qc;
439
440 if (dev_is_sata(device)) {
441 qc = task->uldd_task;
442 scmd = qc->scsicmd;
443 } else {
444 scmd = task->uldd_task;
445 }
446 }
447
448 if (scmd && hisi_hba->shost->nr_hw_queues) {
449 unsigned int dq_index;
450 u32 blk_tag;
451
452 blk_tag = blk_mq_unique_tag(scmd->request);
453 dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
454 *dq_pointer = dq = &hisi_hba->dq[dq_index];
455 } else if (hisi_hba->shost->nr_hw_queues) {
456 struct Scsi_Host *shost = hisi_hba->shost;
457 struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
458 int queue = qmap->mq_map[raw_smp_processor_id()];
459
460 *dq_pointer = dq = &hisi_hba->dq[queue];
461 } else {
462 *dq_pointer = dq = sas_dev->dq;
463 }
464
465 port = to_hisi_sas_port(sas_port);
466 if (port && !port->port_attached) {
467 dev_info(dev, "task prep: %s port%d not attach device\n",
468 (dev_is_sata(device)) ?
469 "SATA/STP" : "SAS",
470 device->port->id);
471
472 return -ECOMM;
473 }
474
475 rc = hisi_sas_dma_map(hisi_hba, task, &n_elem,
476 &n_elem_req);
477 if (rc < 0)
478 goto prep_out;
479
480 if (!sas_protocol_ata(task->task_proto)) {
481 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
482 if (rc < 0)
483 goto err_out_dma_unmap;
484 }
485
486 if (hisi_hba->hw->slot_index_alloc)
487 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
488 else
489 rc = hisi_sas_slot_index_alloc(hisi_hba, scmd);
490
491 if (rc < 0)
492 goto err_out_dif_dma_unmap;
493
494 slot_idx = rc;
495 slot = &hisi_hba->slot_info[slot_idx];
496
497 spin_lock(&dq->lock);
498 wr_q_index = dq->wr_point;
499 dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
500 list_add_tail(&slot->delivery, &dq->list);
501 spin_unlock(&dq->lock);
502 spin_lock(&sas_dev->lock);
503 list_add_tail(&slot->entry, &sas_dev->list);
504 spin_unlock(&sas_dev->lock);
505
506 dlvry_queue = dq->id;
507 dlvry_queue_slot = wr_q_index;
508
509 slot->device_id = sas_dev->device_id;
510 slot->n_elem = n_elem;
511 slot->n_elem_dif = n_elem_dif;
512 slot->dlvry_queue = dlvry_queue;
513 slot->dlvry_queue_slot = dlvry_queue_slot;
514 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
515 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
516 slot->task = task;
517 slot->port = port;
518 slot->tmf = tmf;
519 slot->is_internal = is_tmf;
520 task->lldd_task = slot;
521
522 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
523 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
524 memset(hisi_sas_status_buf_addr_mem(slot), 0,
525 sizeof(struct hisi_sas_err_record));
526
527 switch (task->task_proto) {
528 case SAS_PROTOCOL_SMP:
529 hisi_sas_task_prep_smp(hisi_hba, slot);
530 break;
531 case SAS_PROTOCOL_SSP:
532 hisi_sas_task_prep_ssp(hisi_hba, slot);
533 break;
534 case SAS_PROTOCOL_SATA:
535 case SAS_PROTOCOL_STP:
536 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
537 hisi_sas_task_prep_ata(hisi_hba, slot);
538 break;
539 default:
540 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
541 task->task_proto);
542 break;
543 }
544
545 spin_lock_irqsave(&task->task_state_lock, flags);
546 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
547 spin_unlock_irqrestore(&task->task_state_lock, flags);
548
549 ++(*pass);
550 WRITE_ONCE(slot->ready, 1);
551
552 return 0;
553
554 err_out_dif_dma_unmap:
555 if (!sas_protocol_ata(task->task_proto))
556 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
557 err_out_dma_unmap:
558 hisi_sas_dma_unmap(hisi_hba, task, n_elem,
559 n_elem_req);
560 prep_out:
561 dev_err(dev, "task prep: failed[%d]!\n", rc);
562 return rc;
563 }
564
565 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
566 bool is_tmf, struct hisi_sas_tmf_task *tmf)
567 {
568 u32 rc;
569 u32 pass = 0;
570 struct hisi_hba *hisi_hba;
571 struct device *dev;
572 struct domain_device *device = task->dev;
573 struct asd_sas_port *sas_port = device->port;
574 struct hisi_sas_dq *dq = NULL;
575
576 if (!sas_port) {
577 struct task_status_struct *ts = &task->task_status;
578
579 ts->resp = SAS_TASK_UNDELIVERED;
580 ts->stat = SAS_PHY_DOWN;
581 /*
582 * libsas will use dev->port, should
583 * not call task_done for sata
584 */
585 if (device->dev_type != SAS_SATA_DEV)
586 task->task_done(task);
587 return -ECOMM;
588 }
589
590 hisi_hba = dev_to_hisi_hba(device);
591 dev = hisi_hba->dev;
592
593 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
594 if (!gfpflags_allow_blocking(gfp_flags))
595 return -EINVAL;
596
597 down(&hisi_hba->sem);
598 up(&hisi_hba->sem);
599 }
600
601 /* protect task_prep and start_delivery sequence */
602 rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf, &pass);
603 if (rc)
604 dev_err(dev, "task exec: failed[%d]!\n", rc);
605
606 if (likely(pass)) {
607 spin_lock(&dq->lock);
608 hisi_hba->hw->start_delivery(dq);
609 spin_unlock(&dq->lock);
610 }
611
612 return rc;
613 }
614
615 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
616 {
617 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
618 struct asd_sas_phy *sas_phy = &phy->sas_phy;
619 struct sas_ha_struct *sas_ha;
620
621 if (!phy->phy_attached)
622 return;
623
624 if (test_bit(HISI_SAS_PM_BIT, &hisi_hba->flags) &&
625 !sas_phy->suspended) {
626 dev_warn(hisi_hba->dev, "phy%d during suspend filtered out\n", phy_no);
627 return;
628 }
629
630 sas_ha = &hisi_hba->sha;
631 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
632
633 if (sas_phy->phy) {
634 struct sas_phy *sphy = sas_phy->phy;
635
636 sphy->negotiated_linkrate = sas_phy->linkrate;
637 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
638 sphy->maximum_linkrate_hw =
639 hisi_hba->hw->phy_get_max_linkrate();
640 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
641 sphy->minimum_linkrate = phy->minimum_linkrate;
642
643 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
644 sphy->maximum_linkrate = phy->maximum_linkrate;
645 }
646
647 if (phy->phy_type & PORT_TYPE_SAS) {
648 struct sas_identify_frame *id;
649
650 id = (struct sas_identify_frame *)phy->frame_rcvd;
651 id->dev_type = phy->identify.device_type;
652 id->initiator_bits = SAS_PROTOCOL_ALL;
653 id->target_bits = phy->identify.target_port_protocols;
654 } else if (phy->phy_type & PORT_TYPE_SATA) {
655 /* Nothing */
656 }
657
658 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
659 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
660 }
661
662 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
663 {
664 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
665 struct hisi_sas_device *sas_dev = NULL;
666 int last = hisi_hba->last_dev_id;
667 int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
668 int i;
669
670 spin_lock(&hisi_hba->lock);
671 for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
672 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
673 int queue = i % hisi_hba->queue_count;
674 struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
675
676 hisi_hba->devices[i].device_id = i;
677 sas_dev = &hisi_hba->devices[i];
678 sas_dev->dev_status = HISI_SAS_DEV_INIT;
679 sas_dev->dev_type = device->dev_type;
680 sas_dev->hisi_hba = hisi_hba;
681 sas_dev->sas_device = device;
682 sas_dev->dq = dq;
683 spin_lock_init(&sas_dev->lock);
684 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
685 break;
686 }
687 i++;
688 }
689 hisi_hba->last_dev_id = i;
690 spin_unlock(&hisi_hba->lock);
691
692 return sas_dev;
693 }
694
695 #define HISI_SAS_DISK_RECOVER_CNT 3
696 static int hisi_sas_init_device(struct domain_device *device)
697 {
698 int rc = TMF_RESP_FUNC_COMPLETE;
699 struct scsi_lun lun;
700 struct hisi_sas_tmf_task tmf_task;
701 int retry = HISI_SAS_DISK_RECOVER_CNT;
702 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
703 struct device *dev = hisi_hba->dev;
704 struct sas_phy *local_phy;
705
706 switch (device->dev_type) {
707 case SAS_END_DEVICE:
708 int_to_scsilun(0, &lun);
709
710 tmf_task.tmf = TMF_CLEAR_TASK_SET;
711 while (retry-- > 0) {
712 rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
713 &tmf_task);
714 if (rc == TMF_RESP_FUNC_COMPLETE) {
715 hisi_sas_release_task(hisi_hba, device);
716 break;
717 }
718 }
719 break;
720 case SAS_SATA_DEV:
721 case SAS_SATA_PM:
722 case SAS_SATA_PM_PORT:
723 case SAS_SATA_PENDING:
724 /*
725 * send HARD RESET to clear previous affiliation of
726 * STP target port
727 */
728 local_phy = sas_get_local_phy(device);
729 if (!scsi_is_sas_phy_local(local_phy) &&
730 !test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
731 unsigned long deadline = ata_deadline(jiffies, 20000);
732 struct sata_device *sata_dev = &device->sata_dev;
733 struct ata_host *ata_host = sata_dev->ata_host;
734 struct ata_port_operations *ops = ata_host->ops;
735 struct ata_port *ap = sata_dev->ap;
736 struct ata_link *link;
737 unsigned int classes;
738
739 ata_for_each_link(link, ap, EDGE)
740 rc = ops->hardreset(link, &classes,
741 deadline);
742 }
743 sas_put_local_phy(local_phy);
744 if (rc) {
745 dev_warn(dev, "SATA disk hardreset fail: %d\n", rc);
746 return rc;
747 }
748
749 while (retry-- > 0) {
750 rc = hisi_sas_softreset_ata_disk(device);
751 if (!rc)
752 break;
753 }
754 break;
755 default:
756 break;
757 }
758
759 return rc;
760 }
761
762 static int hisi_sas_dev_found(struct domain_device *device)
763 {
764 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
765 struct domain_device *parent_dev = device->parent;
766 struct hisi_sas_device *sas_dev;
767 struct device *dev = hisi_hba->dev;
768 int rc;
769
770 if (hisi_hba->hw->alloc_dev)
771 sas_dev = hisi_hba->hw->alloc_dev(device);
772 else
773 sas_dev = hisi_sas_alloc_dev(device);
774 if (!sas_dev) {
775 dev_err(dev, "fail alloc dev: max support %d devices\n",
776 HISI_SAS_MAX_DEVICES);
777 return -EINVAL;
778 }
779
780 device->lldd_dev = sas_dev;
781 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
782
783 if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
784 int phy_no;
785 u8 phy_num = parent_dev->ex_dev.num_phys;
786 struct ex_phy *phy;
787
788 for (phy_no = 0; phy_no < phy_num; phy_no++) {
789 phy = &parent_dev->ex_dev.ex_phy[phy_no];
790 if (SAS_ADDR(phy->attached_sas_addr) ==
791 SAS_ADDR(device->sas_addr))
792 break;
793 }
794
795 if (phy_no == phy_num) {
796 dev_info(dev, "dev found: no attached "
797 "dev:%016llx at ex:%016llx\n",
798 SAS_ADDR(device->sas_addr),
799 SAS_ADDR(parent_dev->sas_addr));
800 rc = -EINVAL;
801 goto err_out;
802 }
803 }
804
805 dev_info(dev, "dev[%d:%x] found\n",
806 sas_dev->device_id, sas_dev->dev_type);
807
808 rc = hisi_sas_init_device(device);
809 if (rc)
810 goto err_out;
811 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
812 return 0;
813
814 err_out:
815 hisi_sas_dev_gone(device);
816 return rc;
817 }
818
819 int hisi_sas_slave_configure(struct scsi_device *sdev)
820 {
821 struct domain_device *dev = sdev_to_domain_dev(sdev);
822 int ret = sas_slave_configure(sdev);
823
824 if (ret)
825 return ret;
826 if (!dev_is_sata(dev))
827 sas_change_queue_depth(sdev, 64);
828
829 return 0;
830 }
831 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
832
833 void hisi_sas_scan_start(struct Scsi_Host *shost)
834 {
835 struct hisi_hba *hisi_hba = shost_priv(shost);
836
837 hisi_hba->hw->phys_init(hisi_hba);
838 }
839 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
840
841 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
842 {
843 struct hisi_hba *hisi_hba = shost_priv(shost);
844 struct sas_ha_struct *sha = &hisi_hba->sha;
845
846 /* Wait for PHY up interrupt to occur */
847 if (time < HZ)
848 return 0;
849
850 sas_drain_work(sha);
851 return 1;
852 }
853 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
854
855 static void hisi_sas_phyup_work(struct work_struct *work)
856 {
857 struct hisi_sas_phy *phy =
858 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
859 struct hisi_hba *hisi_hba = phy->hisi_hba;
860 struct asd_sas_phy *sas_phy = &phy->sas_phy;
861 int phy_no = sas_phy->id;
862
863 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
864 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
865 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
866 }
867
868 static void hisi_sas_linkreset_work(struct work_struct *work)
869 {
870 struct hisi_sas_phy *phy =
871 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
872 struct asd_sas_phy *sas_phy = &phy->sas_phy;
873
874 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
875 }
876
877 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
878 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
879 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
880 };
881
882 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
883 enum hisi_sas_phy_event event)
884 {
885 struct hisi_hba *hisi_hba = phy->hisi_hba;
886
887 if (WARN_ON(event >= HISI_PHYES_NUM))
888 return false;
889
890 return queue_work(hisi_hba->wq, &phy->works[event]);
891 }
892 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
893
894 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
895 {
896 struct hisi_sas_phy *phy = from_timer(phy, t, timer);
897 struct hisi_hba *hisi_hba = phy->hisi_hba;
898 struct device *dev = hisi_hba->dev;
899 int phy_no = phy->sas_phy.id;
900
901 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
902 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
903 }
904
905 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
906 {
907 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
908 struct device *dev = hisi_hba->dev;
909
910 dev_dbg(dev, "phy%d OOB ready\n", phy_no);
911 if (phy->phy_attached)
912 return;
913
914 if (!timer_pending(&phy->timer)) {
915 phy->timer.expires = jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT * HZ;
916 add_timer(&phy->timer);
917 }
918 }
919 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
920
921 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
922 {
923 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
924 struct asd_sas_phy *sas_phy = &phy->sas_phy;
925 int i;
926
927 phy->hisi_hba = hisi_hba;
928 phy->port = NULL;
929 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
930 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
931 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
932 sas_phy->class = SAS;
933 sas_phy->iproto = SAS_PROTOCOL_ALL;
934 sas_phy->tproto = 0;
935 sas_phy->type = PHY_TYPE_PHYSICAL;
936 sas_phy->role = PHY_ROLE_INITIATOR;
937 sas_phy->oob_mode = OOB_NOT_CONNECTED;
938 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
939 sas_phy->id = phy_no;
940 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
941 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
942 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
943 sas_phy->lldd_phy = phy;
944
945 for (i = 0; i < HISI_PHYES_NUM; i++)
946 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
947
948 spin_lock_init(&phy->lock);
949
950 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
951 }
952
953 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
954 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
955 {
956 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
957 struct asd_sas_phy *aphy = &phy->sas_phy;
958 struct sas_phy *sphy = aphy->phy;
959 unsigned long flags;
960
961 spin_lock_irqsave(&phy->lock, flags);
962
963 if (enable) {
964 /* We may have been enabled already; if so, don't touch */
965 if (!phy->enable)
966 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
967 hisi_hba->hw->phy_start(hisi_hba, phy_no);
968 } else {
969 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
970 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
971 }
972 phy->enable = enable;
973 spin_unlock_irqrestore(&phy->lock, flags);
974 }
975 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
976
977 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
978 {
979 struct sas_ha_struct *sas_ha = sas_phy->ha;
980 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
981 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
982 struct asd_sas_port *sas_port = sas_phy->port;
983 struct hisi_sas_port *port;
984 unsigned long flags;
985
986 if (!sas_port)
987 return;
988
989 port = to_hisi_sas_port(sas_port);
990 spin_lock_irqsave(&hisi_hba->lock, flags);
991 port->port_attached = 1;
992 port->id = phy->port_id;
993 phy->port = port;
994 sas_port->lldd_port = port;
995 spin_unlock_irqrestore(&hisi_hba->lock, flags);
996 }
997
998 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
999 struct hisi_sas_slot *slot)
1000 {
1001 if (task) {
1002 unsigned long flags;
1003 struct task_status_struct *ts;
1004
1005 ts = &task->task_status;
1006
1007 ts->resp = SAS_TASK_COMPLETE;
1008 ts->stat = SAS_ABORTED_TASK;
1009 spin_lock_irqsave(&task->task_state_lock, flags);
1010 task->task_state_flags &=
1011 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1012 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1013 task->task_state_flags |= SAS_TASK_STATE_DONE;
1014 spin_unlock_irqrestore(&task->task_state_lock, flags);
1015 }
1016
1017 hisi_sas_slot_task_free(hisi_hba, task, slot);
1018 }
1019
1020 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1021 struct domain_device *device)
1022 {
1023 struct hisi_sas_slot *slot, *slot2;
1024 struct hisi_sas_device *sas_dev = device->lldd_dev;
1025
1026 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1027 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
1028 }
1029
1030 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1031 {
1032 struct hisi_sas_device *sas_dev;
1033 struct domain_device *device;
1034 int i;
1035
1036 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1037 sas_dev = &hisi_hba->devices[i];
1038 device = sas_dev->sas_device;
1039
1040 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1041 !device)
1042 continue;
1043
1044 hisi_sas_release_task(hisi_hba, device);
1045 }
1046 }
1047 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1048
1049 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1050 struct domain_device *device)
1051 {
1052 if (hisi_hba->hw->dereg_device)
1053 hisi_hba->hw->dereg_device(hisi_hba, device);
1054 }
1055
1056 static void hisi_sas_dev_gone(struct domain_device *device)
1057 {
1058 struct hisi_sas_device *sas_dev = device->lldd_dev;
1059 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1060 struct device *dev = hisi_hba->dev;
1061 int ret = 0;
1062
1063 dev_info(dev, "dev[%d:%x] is gone\n",
1064 sas_dev->device_id, sas_dev->dev_type);
1065
1066 down(&hisi_hba->sem);
1067 if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
1068 hisi_sas_internal_task_abort(hisi_hba, device,
1069 HISI_SAS_INT_ABT_DEV, 0);
1070
1071 hisi_sas_dereg_device(hisi_hba, device);
1072
1073 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1074 device->lldd_dev = NULL;
1075 }
1076
1077 if (hisi_hba->hw->free_device)
1078 hisi_hba->hw->free_device(sas_dev);
1079
1080 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1081 if (!ret)
1082 sas_dev->dev_type = SAS_PHY_UNUSED;
1083 sas_dev->sas_device = NULL;
1084 up(&hisi_hba->sem);
1085 }
1086
1087 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
1088 {
1089 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
1090 }
1091
1092 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1093 struct sas_phy_linkrates *r)
1094 {
1095 struct sas_phy_linkrates _r;
1096
1097 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1098 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1099 enum sas_linkrate min, max;
1100
1101 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1102 return -EINVAL;
1103
1104 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1105 max = sas_phy->phy->maximum_linkrate;
1106 min = r->minimum_linkrate;
1107 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1108 max = r->maximum_linkrate;
1109 min = sas_phy->phy->minimum_linkrate;
1110 } else
1111 return -EINVAL;
1112
1113 _r.maximum_linkrate = max;
1114 _r.minimum_linkrate = min;
1115
1116 sas_phy->phy->maximum_linkrate = max;
1117 sas_phy->phy->minimum_linkrate = min;
1118
1119 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1120 msleep(100);
1121 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1122 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1123
1124 return 0;
1125 }
1126
1127 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1128 void *funcdata)
1129 {
1130 struct sas_ha_struct *sas_ha = sas_phy->ha;
1131 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1132 int phy_no = sas_phy->id;
1133
1134 switch (func) {
1135 case PHY_FUNC_HARD_RESET:
1136 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1137 break;
1138
1139 case PHY_FUNC_LINK_RESET:
1140 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1141 msleep(100);
1142 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1143 break;
1144
1145 case PHY_FUNC_DISABLE:
1146 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1147 break;
1148
1149 case PHY_FUNC_SET_LINK_RATE:
1150 return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1151 case PHY_FUNC_GET_EVENTS:
1152 if (hisi_hba->hw->get_events) {
1153 hisi_hba->hw->get_events(hisi_hba, phy_no);
1154 break;
1155 }
1156 fallthrough;
1157 case PHY_FUNC_RELEASE_SPINUP_HOLD:
1158 default:
1159 return -EOPNOTSUPP;
1160 }
1161 return 0;
1162 }
1163
1164 static void hisi_sas_task_done(struct sas_task *task)
1165 {
1166 del_timer(&task->slow_task->timer);
1167 complete(&task->slow_task->completion);
1168 }
1169
1170 static void hisi_sas_tmf_timedout(struct timer_list *t)
1171 {
1172 struct sas_task_slow *slow = from_timer(slow, t, timer);
1173 struct sas_task *task = slow->task;
1174 unsigned long flags;
1175 bool is_completed = true;
1176
1177 spin_lock_irqsave(&task->task_state_lock, flags);
1178 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1179 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1180 is_completed = false;
1181 }
1182 spin_unlock_irqrestore(&task->task_state_lock, flags);
1183
1184 if (!is_completed)
1185 complete(&task->slow_task->completion);
1186 }
1187
1188 #define TASK_TIMEOUT 20
1189 #define TASK_RETRY 3
1190 #define INTERNAL_ABORT_TIMEOUT 6
1191 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
1192 void *parameter, u32 para_len,
1193 struct hisi_sas_tmf_task *tmf)
1194 {
1195 struct hisi_sas_device *sas_dev = device->lldd_dev;
1196 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1197 struct device *dev = hisi_hba->dev;
1198 struct sas_task *task;
1199 int res, retry;
1200
1201 for (retry = 0; retry < TASK_RETRY; retry++) {
1202 task = sas_alloc_slow_task(GFP_KERNEL);
1203 if (!task)
1204 return -ENOMEM;
1205
1206 task->dev = device;
1207 task->task_proto = device->tproto;
1208
1209 if (dev_is_sata(device)) {
1210 task->ata_task.device_control_reg_update = 1;
1211 memcpy(&task->ata_task.fis, parameter, para_len);
1212 } else {
1213 memcpy(&task->ssp_task, parameter, para_len);
1214 }
1215 task->task_done = hisi_sas_task_done;
1216
1217 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1218 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT * HZ;
1219 add_timer(&task->slow_task->timer);
1220
1221 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
1222
1223 if (res) {
1224 del_timer(&task->slow_task->timer);
1225 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
1226 res);
1227 goto ex_err;
1228 }
1229
1230 wait_for_completion(&task->slow_task->completion);
1231 res = TMF_RESP_FUNC_FAILED;
1232 /* Even TMF timed out, return direct. */
1233 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1234 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1235 struct hisi_sas_slot *slot = task->lldd_task;
1236
1237 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1238 if (slot) {
1239 struct hisi_sas_cq *cq =
1240 &hisi_hba->cq[slot->dlvry_queue];
1241 /*
1242 * sync irq to avoid free'ing task
1243 * before using task in IO completion
1244 */
1245 synchronize_irq(cq->irq_no);
1246 slot->task = NULL;
1247 }
1248
1249 goto ex_err;
1250 } else
1251 dev_err(dev, "abort tmf: TMF task timeout\n");
1252 }
1253
1254 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1255 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1256 res = TMF_RESP_FUNC_COMPLETE;
1257 break;
1258 }
1259
1260 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1261 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1262 res = TMF_RESP_FUNC_SUCC;
1263 break;
1264 }
1265
1266 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1267 task->task_status.stat == SAS_DATA_UNDERRUN) {
1268 /* no error, but return the number of bytes of
1269 * underrun
1270 */
1271 dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x sts 0x%x underrun\n",
1272 SAS_ADDR(device->sas_addr),
1273 task->task_status.resp,
1274 task->task_status.stat);
1275 res = task->task_status.residual;
1276 break;
1277 }
1278
1279 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1280 task->task_status.stat == SAS_DATA_OVERRUN) {
1281 dev_warn(dev, "abort tmf: blocked task error\n");
1282 res = -EMSGSIZE;
1283 break;
1284 }
1285
1286 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1287 task->task_status.stat == SAS_OPEN_REJECT) {
1288 dev_warn(dev, "abort tmf: open reject failed\n");
1289 res = -EIO;
1290 } else {
1291 dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x status 0x%x\n",
1292 SAS_ADDR(device->sas_addr),
1293 task->task_status.resp,
1294 task->task_status.stat);
1295 }
1296 sas_free_task(task);
1297 task = NULL;
1298 }
1299 ex_err:
1300 if (retry == TASK_RETRY)
1301 dev_warn(dev, "abort tmf: executing internal task failed!\n");
1302 sas_free_task(task);
1303 return res;
1304 }
1305
1306 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1307 bool reset, int pmp, u8 *fis)
1308 {
1309 struct ata_taskfile tf;
1310
1311 ata_tf_init(dev, &tf);
1312 if (reset)
1313 tf.ctl |= ATA_SRST;
1314 else
1315 tf.ctl &= ~ATA_SRST;
1316 tf.command = ATA_CMD_DEV_RESET;
1317 ata_tf_to_fis(&tf, pmp, 0, fis);
1318 }
1319
1320 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1321 {
1322 u8 fis[20] = {0};
1323 struct ata_port *ap = device->sata_dev.ap;
1324 struct ata_link *link;
1325 int rc = TMF_RESP_FUNC_FAILED;
1326 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1327 struct device *dev = hisi_hba->dev;
1328 int s = sizeof(struct host_to_dev_fis);
1329
1330 ata_for_each_link(link, ap, EDGE) {
1331 int pmp = sata_srst_pmp(link);
1332
1333 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1334 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1335 if (rc != TMF_RESP_FUNC_COMPLETE)
1336 break;
1337 }
1338
1339 if (rc == TMF_RESP_FUNC_COMPLETE) {
1340 ata_for_each_link(link, ap, EDGE) {
1341 int pmp = sata_srst_pmp(link);
1342
1343 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1344 rc = hisi_sas_exec_internal_tmf_task(device, fis,
1345 s, NULL);
1346 if (rc != TMF_RESP_FUNC_COMPLETE)
1347 dev_err(dev, "ata disk de-reset failed\n");
1348 }
1349 } else {
1350 dev_err(dev, "ata disk reset failed\n");
1351 }
1352
1353 if (rc == TMF_RESP_FUNC_COMPLETE)
1354 hisi_sas_release_task(hisi_hba, device);
1355
1356 return rc;
1357 }
1358
1359 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1360 u8 *lun, struct hisi_sas_tmf_task *tmf)
1361 {
1362 struct sas_ssp_task ssp_task;
1363
1364 if (!(device->tproto & SAS_PROTOCOL_SSP))
1365 return TMF_RESP_FUNC_ESUPP;
1366
1367 memcpy(ssp_task.LUN, lun, 8);
1368
1369 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1370 sizeof(ssp_task), tmf);
1371 }
1372
1373 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1374 {
1375 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1376 int i;
1377
1378 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1379 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1380 struct domain_device *device = sas_dev->sas_device;
1381 struct asd_sas_port *sas_port;
1382 struct hisi_sas_port *port;
1383 struct hisi_sas_phy *phy = NULL;
1384 struct asd_sas_phy *sas_phy;
1385
1386 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1387 || !device || !device->port)
1388 continue;
1389
1390 sas_port = device->port;
1391 port = to_hisi_sas_port(sas_port);
1392
1393 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1394 if (state & BIT(sas_phy->id)) {
1395 phy = sas_phy->lldd_phy;
1396 break;
1397 }
1398
1399 if (phy) {
1400 port->id = phy->port_id;
1401
1402 /* Update linkrate of directly attached device. */
1403 if (!device->parent)
1404 device->linkrate = phy->sas_phy.linkrate;
1405
1406 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1407 } else
1408 port->id = 0xff;
1409 }
1410 }
1411
1412 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1413 {
1414 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1415 struct asd_sas_port *_sas_port = NULL;
1416 int phy_no;
1417
1418 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1419 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1420 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1421 struct asd_sas_port *sas_port = sas_phy->port;
1422 bool do_port_check = _sas_port != sas_port;
1423
1424 if (!sas_phy->phy->enabled)
1425 continue;
1426
1427 /* Report PHY state change to libsas */
1428 if (state & BIT(phy_no)) {
1429 if (do_port_check && sas_port && sas_port->port_dev) {
1430 struct domain_device *dev = sas_port->port_dev;
1431
1432 _sas_port = sas_port;
1433
1434 if (dev_is_expander(dev->dev_type))
1435 sas_ha->notify_port_event(sas_phy,
1436 PORTE_BROADCAST_RCVD);
1437 }
1438 } else {
1439 hisi_sas_phy_down(hisi_hba, phy_no, 0);
1440 }
1441 }
1442 }
1443
1444 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1445 {
1446 struct hisi_sas_device *sas_dev;
1447 struct domain_device *device;
1448 int i;
1449
1450 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1451 sas_dev = &hisi_hba->devices[i];
1452 device = sas_dev->sas_device;
1453
1454 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1455 continue;
1456
1457 hisi_sas_init_device(device);
1458 }
1459 }
1460
1461 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1462 struct asd_sas_port *sas_port,
1463 struct domain_device *device)
1464 {
1465 struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
1466 struct ata_port *ap = device->sata_dev.ap;
1467 struct device *dev = hisi_hba->dev;
1468 int s = sizeof(struct host_to_dev_fis);
1469 int rc = TMF_RESP_FUNC_FAILED;
1470 struct asd_sas_phy *sas_phy;
1471 struct ata_link *link;
1472 u8 fis[20] = {0};
1473 u32 state;
1474
1475 state = hisi_hba->hw->get_phys_state(hisi_hba);
1476 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) {
1477 if (!(state & BIT(sas_phy->id)))
1478 continue;
1479
1480 ata_for_each_link(link, ap, EDGE) {
1481 int pmp = sata_srst_pmp(link);
1482
1483 tmf_task.phy_id = sas_phy->id;
1484 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1485 rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
1486 &tmf_task);
1487 if (rc != TMF_RESP_FUNC_COMPLETE) {
1488 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1489 sas_phy->id, rc);
1490 break;
1491 }
1492 }
1493 }
1494 }
1495
1496 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1497 {
1498 struct device *dev = hisi_hba->dev;
1499 int port_no, rc, i;
1500
1501 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1502 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1503 struct domain_device *device = sas_dev->sas_device;
1504
1505 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1506 continue;
1507
1508 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1509 HISI_SAS_INT_ABT_DEV, 0);
1510 if (rc < 0)
1511 dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1512 }
1513
1514 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1515 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1516 struct asd_sas_port *sas_port = &port->sas_port;
1517 struct domain_device *port_dev = sas_port->port_dev;
1518 struct domain_device *device;
1519
1520 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1521 continue;
1522
1523 /* Try to find a SATA device */
1524 list_for_each_entry(device, &sas_port->dev_list,
1525 dev_list_node) {
1526 if (dev_is_sata(device)) {
1527 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1528 sas_port,
1529 device);
1530 break;
1531 }
1532 }
1533 }
1534 }
1535
1536 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1537 {
1538 struct Scsi_Host *shost = hisi_hba->shost;
1539
1540 down(&hisi_hba->sem);
1541 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1542
1543 scsi_block_requests(shost);
1544 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1545
1546 if (timer_pending(&hisi_hba->timer))
1547 del_timer_sync(&hisi_hba->timer);
1548
1549 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1550 }
1551 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1552
1553 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1554 {
1555 struct Scsi_Host *shost = hisi_hba->shost;
1556
1557 /* Init and wait for PHYs to come up and all libsas event finished. */
1558 hisi_hba->hw->phys_init(hisi_hba);
1559 msleep(1000);
1560 hisi_sas_refresh_port_id(hisi_hba);
1561 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1562
1563 if (hisi_hba->reject_stp_links_msk)
1564 hisi_sas_terminate_stp_reject(hisi_hba);
1565 hisi_sas_reset_init_all_devices(hisi_hba);
1566 up(&hisi_hba->sem);
1567 scsi_unblock_requests(shost);
1568 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1569
1570 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1571 }
1572 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1573
1574 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1575 {
1576 struct device *dev = hisi_hba->dev;
1577 struct Scsi_Host *shost = hisi_hba->shost;
1578 int rc;
1579
1580 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1581 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
1582
1583 if (!hisi_hba->hw->soft_reset)
1584 return -1;
1585
1586 if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1587 return -1;
1588
1589 dev_info(dev, "controller resetting...\n");
1590 hisi_sas_controller_reset_prepare(hisi_hba);
1591
1592 rc = hisi_hba->hw->soft_reset(hisi_hba);
1593 if (rc) {
1594 dev_warn(dev, "controller reset failed (%d)\n", rc);
1595 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1596 up(&hisi_hba->sem);
1597 scsi_unblock_requests(shost);
1598 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1599 return rc;
1600 }
1601
1602 hisi_sas_controller_reset_done(hisi_hba);
1603 dev_info(dev, "controller reset complete\n");
1604
1605 return 0;
1606 }
1607
1608 static int hisi_sas_abort_task(struct sas_task *task)
1609 {
1610 struct scsi_lun lun;
1611 struct hisi_sas_tmf_task tmf_task;
1612 struct domain_device *device = task->dev;
1613 struct hisi_sas_device *sas_dev = device->lldd_dev;
1614 struct hisi_hba *hisi_hba;
1615 struct device *dev;
1616 int rc = TMF_RESP_FUNC_FAILED;
1617 unsigned long flags;
1618
1619 if (!sas_dev)
1620 return TMF_RESP_FUNC_FAILED;
1621
1622 hisi_hba = dev_to_hisi_hba(task->dev);
1623 dev = hisi_hba->dev;
1624
1625 spin_lock_irqsave(&task->task_state_lock, flags);
1626 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1627 struct hisi_sas_slot *slot = task->lldd_task;
1628 struct hisi_sas_cq *cq;
1629
1630 if (slot) {
1631 /*
1632 * sync irq to avoid free'ing task
1633 * before using task in IO completion
1634 */
1635 cq = &hisi_hba->cq[slot->dlvry_queue];
1636 synchronize_irq(cq->irq_no);
1637 }
1638 spin_unlock_irqrestore(&task->task_state_lock, flags);
1639 rc = TMF_RESP_FUNC_COMPLETE;
1640 goto out;
1641 }
1642 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1643 spin_unlock_irqrestore(&task->task_state_lock, flags);
1644
1645 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1646 struct scsi_cmnd *cmnd = task->uldd_task;
1647 struct hisi_sas_slot *slot = task->lldd_task;
1648 u16 tag = slot->idx;
1649 int rc2;
1650
1651 int_to_scsilun(cmnd->device->lun, &lun);
1652 tmf_task.tmf = TMF_ABORT_TASK;
1653 tmf_task.tag_of_task_to_be_managed = tag;
1654
1655 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1656 &tmf_task);
1657
1658 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1659 HISI_SAS_INT_ABT_CMD, tag);
1660 if (rc2 < 0) {
1661 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1662 return TMF_RESP_FUNC_FAILED;
1663 }
1664
1665 /*
1666 * If the TMF finds that the IO is not in the device and also
1667 * the internal abort does not succeed, then it is safe to
1668 * free the slot.
1669 * Note: if the internal abort succeeds then the slot
1670 * will have already been completed
1671 */
1672 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1673 if (task->lldd_task)
1674 hisi_sas_do_release_task(hisi_hba, task, slot);
1675 }
1676 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1677 task->task_proto & SAS_PROTOCOL_STP) {
1678 if (task->dev->dev_type == SAS_SATA_DEV) {
1679 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1680 HISI_SAS_INT_ABT_DEV,
1681 0);
1682 if (rc < 0) {
1683 dev_err(dev, "abort task: internal abort failed\n");
1684 goto out;
1685 }
1686 hisi_sas_dereg_device(hisi_hba, device);
1687 rc = hisi_sas_softreset_ata_disk(device);
1688 }
1689 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1690 /* SMP */
1691 struct hisi_sas_slot *slot = task->lldd_task;
1692 u32 tag = slot->idx;
1693 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1694
1695 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1696 HISI_SAS_INT_ABT_CMD, tag);
1697 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1698 task->lldd_task) {
1699 /*
1700 * sync irq to avoid free'ing task
1701 * before using task in IO completion
1702 */
1703 synchronize_irq(cq->irq_no);
1704 slot->task = NULL;
1705 }
1706 }
1707
1708 out:
1709 if (rc != TMF_RESP_FUNC_COMPLETE)
1710 dev_notice(dev, "abort task: rc=%d\n", rc);
1711 return rc;
1712 }
1713
1714 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1715 {
1716 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1717 struct device *dev = hisi_hba->dev;
1718 struct hisi_sas_tmf_task tmf_task;
1719 int rc;
1720
1721 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1722 HISI_SAS_INT_ABT_DEV, 0);
1723 if (rc < 0) {
1724 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1725 return TMF_RESP_FUNC_FAILED;
1726 }
1727 hisi_sas_dereg_device(hisi_hba, device);
1728
1729 tmf_task.tmf = TMF_ABORT_TASK_SET;
1730 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1731
1732 if (rc == TMF_RESP_FUNC_COMPLETE)
1733 hisi_sas_release_task(hisi_hba, device);
1734
1735 return rc;
1736 }
1737
1738 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1739 {
1740 struct hisi_sas_tmf_task tmf_task;
1741 int rc;
1742
1743 tmf_task.tmf = TMF_CLEAR_ACA;
1744 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1745
1746 return rc;
1747 }
1748
1749 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1750 {
1751 struct sas_phy *local_phy = sas_get_local_phy(device);
1752 struct hisi_sas_device *sas_dev = device->lldd_dev;
1753 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1754 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1755 DECLARE_COMPLETION_ONSTACK(phyreset);
1756 int rc, reset_type;
1757
1758 if (!local_phy->enabled) {
1759 sas_put_local_phy(local_phy);
1760 return -ENODEV;
1761 }
1762
1763 if (scsi_is_sas_phy_local(local_phy)) {
1764 struct asd_sas_phy *sas_phy =
1765 sas_ha->sas_phy[local_phy->number];
1766 struct hisi_sas_phy *phy =
1767 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1768 phy->in_reset = 1;
1769 phy->reset_completion = &phyreset;
1770 }
1771
1772 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1773 !dev_is_sata(device)) ? true : false;
1774
1775 rc = sas_phy_reset(local_phy, reset_type);
1776 sas_put_local_phy(local_phy);
1777
1778 if (scsi_is_sas_phy_local(local_phy)) {
1779 struct asd_sas_phy *sas_phy =
1780 sas_ha->sas_phy[local_phy->number];
1781 struct hisi_sas_phy *phy =
1782 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1783 int ret = wait_for_completion_timeout(&phyreset, 2 * HZ);
1784 unsigned long flags;
1785
1786 spin_lock_irqsave(&phy->lock, flags);
1787 phy->reset_completion = NULL;
1788 phy->in_reset = 0;
1789 spin_unlock_irqrestore(&phy->lock, flags);
1790
1791 /* report PHY down if timed out */
1792 if (!ret)
1793 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0);
1794 } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) {
1795 /*
1796 * If in init state, we rely on caller to wait for link to be
1797 * ready; otherwise, except phy reset is fail, delay.
1798 */
1799 if (!rc)
1800 msleep(2000);
1801 }
1802
1803 return rc;
1804 }
1805
1806 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1807 {
1808 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1809 struct device *dev = hisi_hba->dev;
1810 int rc;
1811
1812 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1813 HISI_SAS_INT_ABT_DEV, 0);
1814 if (rc < 0) {
1815 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1816 return TMF_RESP_FUNC_FAILED;
1817 }
1818 hisi_sas_dereg_device(hisi_hba, device);
1819
1820 if (dev_is_sata(device)) {
1821 rc = hisi_sas_softreset_ata_disk(device);
1822 if (rc == TMF_RESP_FUNC_FAILED)
1823 return TMF_RESP_FUNC_FAILED;
1824 }
1825
1826 rc = hisi_sas_debug_I_T_nexus_reset(device);
1827
1828 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1829 hisi_sas_release_task(hisi_hba, device);
1830
1831 return rc;
1832 }
1833
1834 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1835 {
1836 struct hisi_sas_device *sas_dev = device->lldd_dev;
1837 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1838 struct device *dev = hisi_hba->dev;
1839 int rc = TMF_RESP_FUNC_FAILED;
1840
1841 /* Clear internal IO and then lu reset */
1842 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1843 HISI_SAS_INT_ABT_DEV, 0);
1844 if (rc < 0) {
1845 dev_err(dev, "lu_reset: internal abort failed\n");
1846 goto out;
1847 }
1848 hisi_sas_dereg_device(hisi_hba, device);
1849
1850 if (dev_is_sata(device)) {
1851 struct sas_phy *phy;
1852
1853 phy = sas_get_local_phy(device);
1854
1855 rc = sas_phy_reset(phy, true);
1856
1857 if (rc == 0)
1858 hisi_sas_release_task(hisi_hba, device);
1859 sas_put_local_phy(phy);
1860 } else {
1861 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1862
1863 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1864 if (rc == TMF_RESP_FUNC_COMPLETE)
1865 hisi_sas_release_task(hisi_hba, device);
1866 }
1867 out:
1868 if (rc != TMF_RESP_FUNC_COMPLETE)
1869 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1870 sas_dev->device_id, rc);
1871 return rc;
1872 }
1873
1874 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1875 {
1876 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1877 struct device *dev = hisi_hba->dev;
1878 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1879 int rc, i;
1880
1881 queue_work(hisi_hba->wq, &r.work);
1882 wait_for_completion(r.completion);
1883 if (!r.done)
1884 return TMF_RESP_FUNC_FAILED;
1885
1886 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1887 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1888 struct domain_device *device = sas_dev->sas_device;
1889
1890 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1891 dev_is_expander(device->dev_type))
1892 continue;
1893
1894 rc = hisi_sas_debug_I_T_nexus_reset(device);
1895 if (rc != TMF_RESP_FUNC_COMPLETE)
1896 dev_info(dev, "clear nexus ha: for device[%d] rc=%d\n",
1897 sas_dev->device_id, rc);
1898 }
1899
1900 hisi_sas_release_tasks(hisi_hba);
1901
1902 return TMF_RESP_FUNC_COMPLETE;
1903 }
1904
1905 static int hisi_sas_query_task(struct sas_task *task)
1906 {
1907 struct scsi_lun lun;
1908 struct hisi_sas_tmf_task tmf_task;
1909 int rc = TMF_RESP_FUNC_FAILED;
1910
1911 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1912 struct scsi_cmnd *cmnd = task->uldd_task;
1913 struct domain_device *device = task->dev;
1914 struct hisi_sas_slot *slot = task->lldd_task;
1915 u32 tag = slot->idx;
1916
1917 int_to_scsilun(cmnd->device->lun, &lun);
1918 tmf_task.tmf = TMF_QUERY_TASK;
1919 tmf_task.tag_of_task_to_be_managed = tag;
1920
1921 rc = hisi_sas_debug_issue_ssp_tmf(device,
1922 lun.scsi_lun,
1923 &tmf_task);
1924 switch (rc) {
1925 /* The task is still in Lun, release it then */
1926 case TMF_RESP_FUNC_SUCC:
1927 /* The task is not in Lun or failed, reset the phy */
1928 case TMF_RESP_FUNC_FAILED:
1929 case TMF_RESP_FUNC_COMPLETE:
1930 break;
1931 default:
1932 rc = TMF_RESP_FUNC_FAILED;
1933 break;
1934 }
1935 }
1936 return rc;
1937 }
1938
1939 static int
1940 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1941 struct sas_task *task, int abort_flag,
1942 int task_tag, struct hisi_sas_dq *dq)
1943 {
1944 struct domain_device *device = task->dev;
1945 struct hisi_sas_device *sas_dev = device->lldd_dev;
1946 struct device *dev = hisi_hba->dev;
1947 struct hisi_sas_port *port;
1948 struct hisi_sas_slot *slot;
1949 struct asd_sas_port *sas_port = device->port;
1950 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1951 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1952 unsigned long flags;
1953 int wr_q_index;
1954
1955 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1956 return -EINVAL;
1957
1958 if (!device->port)
1959 return -1;
1960
1961 port = to_hisi_sas_port(sas_port);
1962
1963 /* simply get a slot and send abort command */
1964 rc = hisi_sas_slot_index_alloc(hisi_hba, NULL);
1965 if (rc < 0)
1966 goto err_out;
1967
1968 slot_idx = rc;
1969 slot = &hisi_hba->slot_info[slot_idx];
1970
1971 spin_lock(&dq->lock);
1972 wr_q_index = dq->wr_point;
1973 dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
1974 list_add_tail(&slot->delivery, &dq->list);
1975 spin_unlock(&dq->lock);
1976 spin_lock(&sas_dev->lock);
1977 list_add_tail(&slot->entry, &sas_dev->list);
1978 spin_unlock(&sas_dev->lock);
1979
1980 dlvry_queue = dq->id;
1981 dlvry_queue_slot = wr_q_index;
1982
1983 slot->device_id = sas_dev->device_id;
1984 slot->n_elem = n_elem;
1985 slot->dlvry_queue = dlvry_queue;
1986 slot->dlvry_queue_slot = dlvry_queue_slot;
1987 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1988 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1989 slot->task = task;
1990 slot->port = port;
1991 slot->is_internal = true;
1992 task->lldd_task = slot;
1993
1994 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1995 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1996 memset(hisi_sas_status_buf_addr_mem(slot), 0,
1997 sizeof(struct hisi_sas_err_record));
1998
1999 hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
2000 abort_flag, task_tag);
2001
2002 spin_lock_irqsave(&task->task_state_lock, flags);
2003 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
2004 spin_unlock_irqrestore(&task->task_state_lock, flags);
2005 WRITE_ONCE(slot->ready, 1);
2006 /* send abort command to the chip */
2007 spin_lock(&dq->lock);
2008 hisi_hba->hw->start_delivery(dq);
2009 spin_unlock(&dq->lock);
2010
2011 return 0;
2012
2013 err_out:
2014 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
2015
2016 return rc;
2017 }
2018
2019 /**
2020 * _hisi_sas_internal_task_abort -- execute an internal
2021 * abort command for single IO command or a device
2022 * @hisi_hba: host controller struct
2023 * @device: domain device
2024 * @abort_flag: mode of operation, device or single IO
2025 * @tag: tag of IO to be aborted (only relevant to single
2026 * IO mode)
2027 * @dq: delivery queue for this internal abort command
2028 */
2029 static int
2030 _hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2031 struct domain_device *device, int abort_flag,
2032 int tag, struct hisi_sas_dq *dq)
2033 {
2034 struct sas_task *task;
2035 struct hisi_sas_device *sas_dev = device->lldd_dev;
2036 struct device *dev = hisi_hba->dev;
2037 int res;
2038
2039 /*
2040 * The interface is not realized means this HW don't support internal
2041 * abort, or don't need to do internal abort. Then here, we return
2042 * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
2043 * the internal abort has been executed and returned CQ.
2044 */
2045 if (!hisi_hba->hw->prep_abort)
2046 return TMF_RESP_FUNC_FAILED;
2047
2048 task = sas_alloc_slow_task(GFP_KERNEL);
2049 if (!task)
2050 return -ENOMEM;
2051
2052 task->dev = device;
2053 task->task_proto = device->tproto;
2054 task->task_done = hisi_sas_task_done;
2055 task->slow_task->timer.function = hisi_sas_tmf_timedout;
2056 task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT * HZ;
2057 add_timer(&task->slow_task->timer);
2058
2059 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
2060 task, abort_flag, tag, dq);
2061 if (res) {
2062 del_timer(&task->slow_task->timer);
2063 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
2064 res);
2065 goto exit;
2066 }
2067 wait_for_completion(&task->slow_task->completion);
2068 res = TMF_RESP_FUNC_FAILED;
2069
2070 /* Internal abort timed out */
2071 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
2072 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
2073 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
2074
2075 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
2076 struct hisi_sas_slot *slot = task->lldd_task;
2077
2078 if (slot) {
2079 struct hisi_sas_cq *cq =
2080 &hisi_hba->cq[slot->dlvry_queue];
2081 /*
2082 * sync irq to avoid free'ing task
2083 * before using task in IO completion
2084 */
2085 synchronize_irq(cq->irq_no);
2086 slot->task = NULL;
2087 }
2088 dev_err(dev, "internal task abort: timeout and not done.\n");
2089
2090 res = -EIO;
2091 goto exit;
2092 } else
2093 dev_err(dev, "internal task abort: timeout.\n");
2094 }
2095
2096 if (task->task_status.resp == SAS_TASK_COMPLETE &&
2097 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
2098 res = TMF_RESP_FUNC_COMPLETE;
2099 goto exit;
2100 }
2101
2102 if (task->task_status.resp == SAS_TASK_COMPLETE &&
2103 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
2104 res = TMF_RESP_FUNC_SUCC;
2105 goto exit;
2106 }
2107
2108 exit:
2109 dev_dbg(dev, "internal task abort: task to dev %016llx task=%pK resp: 0x%x sts 0x%x\n",
2110 SAS_ADDR(device->sas_addr), task,
2111 task->task_status.resp, /* 0 is complete, -1 is undelivered */
2112 task->task_status.stat);
2113 sas_free_task(task);
2114
2115 return res;
2116 }
2117
2118 static int
2119 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2120 struct domain_device *device,
2121 int abort_flag, int tag)
2122 {
2123 struct hisi_sas_slot *slot;
2124 struct device *dev = hisi_hba->dev;
2125 struct hisi_sas_dq *dq;
2126 int i, rc;
2127
2128 switch (abort_flag) {
2129 case HISI_SAS_INT_ABT_CMD:
2130 slot = &hisi_hba->slot_info[tag];
2131 dq = &hisi_hba->dq[slot->dlvry_queue];
2132 return _hisi_sas_internal_task_abort(hisi_hba, device,
2133 abort_flag, tag, dq);
2134 case HISI_SAS_INT_ABT_DEV:
2135 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2136 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2137 const struct cpumask *mask = cq->irq_mask;
2138
2139 if (mask && !cpumask_intersects(cpu_online_mask, mask))
2140 continue;
2141 dq = &hisi_hba->dq[i];
2142 rc = _hisi_sas_internal_task_abort(hisi_hba, device,
2143 abort_flag, tag,
2144 dq);
2145 if (rc)
2146 return rc;
2147 }
2148 break;
2149 default:
2150 dev_err(dev, "Unrecognised internal abort flag (%d)\n",
2151 abort_flag);
2152 return -EINVAL;
2153 }
2154
2155 return 0;
2156 }
2157
2158 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2159 {
2160 hisi_sas_port_notify_formed(sas_phy);
2161 }
2162
2163 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2164 u8 reg_index, u8 reg_count, u8 *write_data)
2165 {
2166 struct hisi_hba *hisi_hba = sha->lldd_ha;
2167
2168 if (!hisi_hba->hw->write_gpio)
2169 return -EOPNOTSUPP;
2170
2171 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2172 reg_index, reg_count, write_data);
2173 }
2174
2175 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2176 {
2177 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2178 struct sas_phy *sphy = sas_phy->phy;
2179 unsigned long flags;
2180
2181 phy->phy_attached = 0;
2182 phy->phy_type = 0;
2183 phy->port = NULL;
2184
2185 spin_lock_irqsave(&phy->lock, flags);
2186 if (phy->enable)
2187 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2188 else
2189 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2190 spin_unlock_irqrestore(&phy->lock, flags);
2191 }
2192
2193 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
2194 {
2195 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2196 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2197 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
2198 struct device *dev = hisi_hba->dev;
2199
2200 if (rdy) {
2201 /* Phy down but ready */
2202 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
2203 hisi_sas_port_notify_formed(sas_phy);
2204 } else {
2205 struct hisi_sas_port *port = phy->port;
2206
2207 if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
2208 phy->in_reset) {
2209 dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2210 return;
2211 }
2212 /* Phy down and not ready */
2213 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
2214 sas_phy_disconnected(sas_phy);
2215
2216 if (port) {
2217 if (phy->phy_type & PORT_TYPE_SAS) {
2218 int port_id = port->id;
2219
2220 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2221 port_id))
2222 port->port_attached = 0;
2223 } else if (phy->phy_type & PORT_TYPE_SATA)
2224 port->port_attached = 0;
2225 }
2226 hisi_sas_phy_disconnected(phy);
2227 }
2228 }
2229 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2230
2231 void hisi_sas_sync_irqs(struct hisi_hba *hisi_hba)
2232 {
2233 int i;
2234
2235 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2236 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2237
2238 synchronize_irq(cq->irq_no);
2239 }
2240 }
2241 EXPORT_SYMBOL_GPL(hisi_sas_sync_irqs);
2242
2243 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2244 {
2245 struct hisi_hba *hisi_hba = shost_priv(shost);
2246
2247 if (reset_type != SCSI_ADAPTER_RESET)
2248 return -EOPNOTSUPP;
2249
2250 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2251
2252 return 0;
2253 }
2254 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2255
2256 struct scsi_transport_template *hisi_sas_stt;
2257 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2258
2259 static struct sas_domain_function_template hisi_sas_transport_ops = {
2260 .lldd_dev_found = hisi_sas_dev_found,
2261 .lldd_dev_gone = hisi_sas_dev_gone,
2262 .lldd_execute_task = hisi_sas_queue_command,
2263 .lldd_control_phy = hisi_sas_control_phy,
2264 .lldd_abort_task = hisi_sas_abort_task,
2265 .lldd_abort_task_set = hisi_sas_abort_task_set,
2266 .lldd_clear_aca = hisi_sas_clear_aca,
2267 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
2268 .lldd_lu_reset = hisi_sas_lu_reset,
2269 .lldd_query_task = hisi_sas_query_task,
2270 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
2271 .lldd_port_formed = hisi_sas_port_formed,
2272 .lldd_write_gpio = hisi_sas_write_gpio,
2273 };
2274
2275 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2276 {
2277 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2278 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2279
2280 for (i = 0; i < hisi_hba->queue_count; i++) {
2281 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2282 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2283 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2284
2285 s = sizeof(struct hisi_sas_cmd_hdr);
2286 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2287 memset(&cmd_hdr[j], 0, s);
2288
2289 dq->wr_point = 0;
2290
2291 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2292 memset(hisi_hba->complete_hdr[i], 0, s);
2293 cq->rd_point = 0;
2294 }
2295
2296 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2297 memset(hisi_hba->initial_fis, 0, s);
2298
2299 s = max_command_entries * sizeof(struct hisi_sas_iost);
2300 memset(hisi_hba->iost, 0, s);
2301
2302 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2303 memset(hisi_hba->breakpoint, 0, s);
2304
2305 s = sizeof(struct hisi_sas_sata_breakpoint);
2306 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2307 memset(&sata_breakpoint[j], 0, s);
2308 }
2309 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2310
2311 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2312 {
2313 struct device *dev = hisi_hba->dev;
2314 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2315 int max_command_entries_ru, sz_slot_buf_ru;
2316 int blk_cnt, slots_per_blk;
2317
2318 sema_init(&hisi_hba->sem, 1);
2319 spin_lock_init(&hisi_hba->lock);
2320 for (i = 0; i < hisi_hba->n_phy; i++) {
2321 hisi_sas_phy_init(hisi_hba, i);
2322 hisi_hba->port[i].port_attached = 0;
2323 hisi_hba->port[i].id = -1;
2324 }
2325
2326 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2327 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2328 hisi_hba->devices[i].device_id = i;
2329 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2330 }
2331
2332 for (i = 0; i < hisi_hba->queue_count; i++) {
2333 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2334 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2335
2336 /* Completion queue structure */
2337 cq->id = i;
2338 cq->hisi_hba = hisi_hba;
2339
2340 /* Delivery queue structure */
2341 spin_lock_init(&dq->lock);
2342 INIT_LIST_HEAD(&dq->list);
2343 dq->id = i;
2344 dq->hisi_hba = hisi_hba;
2345
2346 /* Delivery queue */
2347 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2348 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2349 &hisi_hba->cmd_hdr_dma[i],
2350 GFP_KERNEL);
2351 if (!hisi_hba->cmd_hdr[i])
2352 goto err_out;
2353
2354 /* Completion queue */
2355 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2356 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2357 &hisi_hba->complete_hdr_dma[i],
2358 GFP_KERNEL);
2359 if (!hisi_hba->complete_hdr[i])
2360 goto err_out;
2361 }
2362
2363 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2364 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2365 GFP_KERNEL);
2366 if (!hisi_hba->itct)
2367 goto err_out;
2368
2369 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2370 sizeof(struct hisi_sas_slot),
2371 GFP_KERNEL);
2372 if (!hisi_hba->slot_info)
2373 goto err_out;
2374
2375 /* roundup to avoid overly large block size */
2376 max_command_entries_ru = roundup(max_command_entries, 64);
2377 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2378 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2379 else
2380 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2381 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2382 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2383 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2384 slots_per_blk = s / sz_slot_buf_ru;
2385
2386 for (i = 0; i < blk_cnt; i++) {
2387 int slot_index = i * slots_per_blk;
2388 dma_addr_t buf_dma;
2389 void *buf;
2390
2391 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2392 GFP_KERNEL);
2393 if (!buf)
2394 goto err_out;
2395
2396 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2397 struct hisi_sas_slot *slot;
2398
2399 slot = &hisi_hba->slot_info[slot_index];
2400 slot->buf = buf;
2401 slot->buf_dma = buf_dma;
2402 slot->idx = slot_index;
2403
2404 buf += sz_slot_buf_ru;
2405 buf_dma += sz_slot_buf_ru;
2406 }
2407 }
2408
2409 s = max_command_entries * sizeof(struct hisi_sas_iost);
2410 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2411 GFP_KERNEL);
2412 if (!hisi_hba->iost)
2413 goto err_out;
2414
2415 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2416 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2417 &hisi_hba->breakpoint_dma,
2418 GFP_KERNEL);
2419 if (!hisi_hba->breakpoint)
2420 goto err_out;
2421
2422 hisi_hba->slot_index_count = max_command_entries;
2423 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
2424 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
2425 if (!hisi_hba->slot_index_tags)
2426 goto err_out;
2427
2428 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2429 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2430 &hisi_hba->initial_fis_dma,
2431 GFP_KERNEL);
2432 if (!hisi_hba->initial_fis)
2433 goto err_out;
2434
2435 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2436 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2437 &hisi_hba->sata_breakpoint_dma,
2438 GFP_KERNEL);
2439 if (!hisi_hba->sata_breakpoint)
2440 goto err_out;
2441
2442 hisi_sas_slot_index_init(hisi_hba);
2443 hisi_hba->last_slot_index = HISI_SAS_UNRESERVED_IPTT;
2444
2445 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2446 if (!hisi_hba->wq) {
2447 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2448 goto err_out;
2449 }
2450
2451 return 0;
2452 err_out:
2453 return -ENOMEM;
2454 }
2455 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2456
2457 void hisi_sas_free(struct hisi_hba *hisi_hba)
2458 {
2459 int i;
2460
2461 for (i = 0; i < hisi_hba->n_phy; i++) {
2462 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2463
2464 del_timer_sync(&phy->timer);
2465 }
2466
2467 if (hisi_hba->wq)
2468 destroy_workqueue(hisi_hba->wq);
2469 }
2470 EXPORT_SYMBOL_GPL(hisi_sas_free);
2471
2472 void hisi_sas_rst_work_handler(struct work_struct *work)
2473 {
2474 struct hisi_hba *hisi_hba =
2475 container_of(work, struct hisi_hba, rst_work);
2476
2477 hisi_sas_controller_reset(hisi_hba);
2478 }
2479 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2480
2481 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2482 {
2483 struct hisi_sas_rst *rst =
2484 container_of(work, struct hisi_sas_rst, work);
2485
2486 if (!hisi_sas_controller_reset(rst->hisi_hba))
2487 rst->done = true;
2488 complete(rst->completion);
2489 }
2490 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2491
2492 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2493 {
2494 struct device *dev = hisi_hba->dev;
2495 struct platform_device *pdev = hisi_hba->platform_dev;
2496 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2497 struct clk *refclk;
2498
2499 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2500 SAS_ADDR_SIZE)) {
2501 dev_err(dev, "could not get property sas-addr\n");
2502 return -ENOENT;
2503 }
2504
2505 if (np) {
2506 /*
2507 * These properties are only required for platform device-based
2508 * controller with DT firmware.
2509 */
2510 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2511 "hisilicon,sas-syscon");
2512 if (IS_ERR(hisi_hba->ctrl)) {
2513 dev_err(dev, "could not get syscon\n");
2514 return -ENOENT;
2515 }
2516
2517 if (device_property_read_u32(dev, "ctrl-reset-reg",
2518 &hisi_hba->ctrl_reset_reg)) {
2519 dev_err(dev, "could not get property ctrl-reset-reg\n");
2520 return -ENOENT;
2521 }
2522
2523 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2524 &hisi_hba->ctrl_reset_sts_reg)) {
2525 dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2526 return -ENOENT;
2527 }
2528
2529 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2530 &hisi_hba->ctrl_clock_ena_reg)) {
2531 dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2532 return -ENOENT;
2533 }
2534 }
2535
2536 refclk = devm_clk_get(dev, NULL);
2537 if (IS_ERR(refclk))
2538 dev_dbg(dev, "no ref clk property\n");
2539 else
2540 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2541
2542 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2543 dev_err(dev, "could not get property phy-count\n");
2544 return -ENOENT;
2545 }
2546
2547 if (device_property_read_u32(dev, "queue-count",
2548 &hisi_hba->queue_count)) {
2549 dev_err(dev, "could not get property queue-count\n");
2550 return -ENOENT;
2551 }
2552
2553 return 0;
2554 }
2555 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2556
2557 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2558 const struct hisi_sas_hw *hw)
2559 {
2560 struct resource *res;
2561 struct Scsi_Host *shost;
2562 struct hisi_hba *hisi_hba;
2563 struct device *dev = &pdev->dev;
2564 int error;
2565
2566 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2567 if (!shost) {
2568 dev_err(dev, "scsi host alloc failed\n");
2569 return NULL;
2570 }
2571 hisi_hba = shost_priv(shost);
2572
2573 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2574 hisi_hba->hw = hw;
2575 hisi_hba->dev = dev;
2576 hisi_hba->platform_dev = pdev;
2577 hisi_hba->shost = shost;
2578 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2579
2580 timer_setup(&hisi_hba->timer, NULL, 0);
2581
2582 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2583 goto err_out;
2584
2585 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2586 if (error)
2587 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
2588
2589 if (error) {
2590 dev_err(dev, "No usable DMA addressing method\n");
2591 goto err_out;
2592 }
2593
2594 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2595 if (IS_ERR(hisi_hba->regs))
2596 goto err_out;
2597
2598 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2599 if (res) {
2600 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2601 if (IS_ERR(hisi_hba->sgpio_regs))
2602 goto err_out;
2603 }
2604
2605 if (hisi_sas_alloc(hisi_hba)) {
2606 hisi_sas_free(hisi_hba);
2607 goto err_out;
2608 }
2609
2610 return shost;
2611 err_out:
2612 scsi_host_put(shost);
2613 dev_err(dev, "shost alloc failed\n");
2614 return NULL;
2615 }
2616
2617 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2618 {
2619 if (hisi_hba->hw->interrupt_preinit)
2620 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2621 return 0;
2622 }
2623
2624 int hisi_sas_probe(struct platform_device *pdev,
2625 const struct hisi_sas_hw *hw)
2626 {
2627 struct Scsi_Host *shost;
2628 struct hisi_hba *hisi_hba;
2629 struct device *dev = &pdev->dev;
2630 struct asd_sas_phy **arr_phy;
2631 struct asd_sas_port **arr_port;
2632 struct sas_ha_struct *sha;
2633 int rc, phy_nr, port_nr, i;
2634
2635 shost = hisi_sas_shost_alloc(pdev, hw);
2636 if (!shost)
2637 return -ENOMEM;
2638
2639 sha = SHOST_TO_SAS_HA(shost);
2640 hisi_hba = shost_priv(shost);
2641 platform_set_drvdata(pdev, sha);
2642
2643 phy_nr = port_nr = hisi_hba->n_phy;
2644
2645 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2646 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2647 if (!arr_phy || !arr_port) {
2648 rc = -ENOMEM;
2649 goto err_out_ha;
2650 }
2651
2652 sha->sas_phy = arr_phy;
2653 sha->sas_port = arr_port;
2654 sha->lldd_ha = hisi_hba;
2655
2656 shost->transportt = hisi_sas_stt;
2657 shost->max_id = HISI_SAS_MAX_DEVICES;
2658 shost->max_lun = ~0;
2659 shost->max_channel = 1;
2660 shost->max_cmd_len = 16;
2661 if (hisi_hba->hw->slot_index_alloc) {
2662 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2663 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2664 } else {
2665 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2666 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2667 }
2668
2669 sha->sas_ha_name = DRV_NAME;
2670 sha->dev = hisi_hba->dev;
2671 sha->lldd_module = THIS_MODULE;
2672 sha->sas_addr = &hisi_hba->sas_addr[0];
2673 sha->num_phys = hisi_hba->n_phy;
2674 sha->core.shost = hisi_hba->shost;
2675
2676 for (i = 0; i < hisi_hba->n_phy; i++) {
2677 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2678 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2679 }
2680
2681 rc = hisi_sas_interrupt_preinit(hisi_hba);
2682 if (rc)
2683 goto err_out_ha;
2684
2685 rc = scsi_add_host(shost, &pdev->dev);
2686 if (rc)
2687 goto err_out_ha;
2688
2689 rc = sas_register_ha(sha);
2690 if (rc)
2691 goto err_out_register_ha;
2692
2693 rc = hisi_hba->hw->hw_init(hisi_hba);
2694 if (rc)
2695 goto err_out_register_ha;
2696
2697 scsi_scan_host(shost);
2698
2699 return 0;
2700
2701 err_out_register_ha:
2702 scsi_remove_host(shost);
2703 err_out_ha:
2704 hisi_sas_free(hisi_hba);
2705 scsi_host_put(shost);
2706 return rc;
2707 }
2708 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2709
2710 int hisi_sas_remove(struct platform_device *pdev)
2711 {
2712 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2713 struct hisi_hba *hisi_hba = sha->lldd_ha;
2714 struct Scsi_Host *shost = sha->core.shost;
2715
2716 if (timer_pending(&hisi_hba->timer))
2717 del_timer(&hisi_hba->timer);
2718
2719 sas_unregister_ha(sha);
2720 sas_remove_host(sha->core.shost);
2721
2722 hisi_sas_free(hisi_hba);
2723 scsi_host_put(shost);
2724 return 0;
2725 }
2726 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2727
2728 bool hisi_sas_debugfs_enable;
2729 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2730 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2731 MODULE_PARM_DESC(hisi_sas_debugfs_enable, "Enable driver debugfs (default disabled)");
2732
2733 u32 hisi_sas_debugfs_dump_count = 1;
2734 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2735 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2736 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2737
2738 struct dentry *hisi_sas_debugfs_dir;
2739 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2740
2741 static __init int hisi_sas_init(void)
2742 {
2743 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2744 if (!hisi_sas_stt)
2745 return -ENOMEM;
2746
2747 if (hisi_sas_debugfs_enable) {
2748 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2749 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2750 pr_info("hisi_sas: Limiting debugfs dump count\n");
2751 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2752 }
2753 }
2754
2755 return 0;
2756 }
2757
2758 static __exit void hisi_sas_exit(void)
2759 {
2760 sas_release_transport(hisi_sas_stt);
2761
2762 debugfs_remove(hisi_sas_debugfs_dir);
2763 }
2764
2765 module_init(hisi_sas_init);
2766 module_exit(hisi_sas_exit);
2767
2768 MODULE_LICENSE("GPL");
2769 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2770 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2771 MODULE_ALIAS("platform:" DRV_NAME);
Linux with added FPC-III support