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[mirror_ubuntu-kernels.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
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_softreset_ata_disk(struct domain_device *device);
14 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
15 void *funcdata);
16 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
17 struct domain_device *device);
18 static void hisi_sas_dev_gone(struct domain_device *device);
19
20 struct hisi_sas_internal_abort_data {
21 bool rst_ha_timeout; /* reset the HA for timeout */
22 };
23
24 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
25 {
26 switch (fis->command) {
27 case ATA_CMD_FPDMA_WRITE:
28 case ATA_CMD_FPDMA_READ:
29 case ATA_CMD_FPDMA_RECV:
30 case ATA_CMD_FPDMA_SEND:
31 case ATA_CMD_NCQ_NON_DATA:
32 return HISI_SAS_SATA_PROTOCOL_FPDMA;
33
34 case ATA_CMD_DOWNLOAD_MICRO:
35 case ATA_CMD_ID_ATA:
36 case ATA_CMD_PMP_READ:
37 case ATA_CMD_READ_LOG_EXT:
38 case ATA_CMD_PIO_READ:
39 case ATA_CMD_PIO_READ_EXT:
40 case ATA_CMD_PMP_WRITE:
41 case ATA_CMD_WRITE_LOG_EXT:
42 case ATA_CMD_PIO_WRITE:
43 case ATA_CMD_PIO_WRITE_EXT:
44 return HISI_SAS_SATA_PROTOCOL_PIO;
45
46 case ATA_CMD_DSM:
47 case ATA_CMD_DOWNLOAD_MICRO_DMA:
48 case ATA_CMD_PMP_READ_DMA:
49 case ATA_CMD_PMP_WRITE_DMA:
50 case ATA_CMD_READ:
51 case ATA_CMD_READ_EXT:
52 case ATA_CMD_READ_LOG_DMA_EXT:
53 case ATA_CMD_READ_STREAM_DMA_EXT:
54 case ATA_CMD_TRUSTED_RCV_DMA:
55 case ATA_CMD_TRUSTED_SND_DMA:
56 case ATA_CMD_WRITE:
57 case ATA_CMD_WRITE_EXT:
58 case ATA_CMD_WRITE_FUA_EXT:
59 case ATA_CMD_WRITE_QUEUED:
60 case ATA_CMD_WRITE_LOG_DMA_EXT:
61 case ATA_CMD_WRITE_STREAM_DMA_EXT:
62 case ATA_CMD_ZAC_MGMT_IN:
63 return HISI_SAS_SATA_PROTOCOL_DMA;
64
65 case ATA_CMD_CHK_POWER:
66 case ATA_CMD_DEV_RESET:
67 case ATA_CMD_EDD:
68 case ATA_CMD_FLUSH:
69 case ATA_CMD_FLUSH_EXT:
70 case ATA_CMD_VERIFY:
71 case ATA_CMD_VERIFY_EXT:
72 case ATA_CMD_SET_FEATURES:
73 case ATA_CMD_STANDBY:
74 case ATA_CMD_STANDBYNOW1:
75 case ATA_CMD_ZAC_MGMT_OUT:
76 return HISI_SAS_SATA_PROTOCOL_NONDATA;
77
78 case ATA_CMD_SET_MAX:
79 switch (fis->features) {
80 case ATA_SET_MAX_PASSWD:
81 case ATA_SET_MAX_LOCK:
82 return HISI_SAS_SATA_PROTOCOL_PIO;
83
84 case ATA_SET_MAX_PASSWD_DMA:
85 case ATA_SET_MAX_UNLOCK_DMA:
86 return HISI_SAS_SATA_PROTOCOL_DMA;
87
88 default:
89 return HISI_SAS_SATA_PROTOCOL_NONDATA;
90 }
91
92 default:
93 {
94 if (direction == DMA_NONE)
95 return HISI_SAS_SATA_PROTOCOL_NONDATA;
96 return HISI_SAS_SATA_PROTOCOL_PIO;
97 }
98 }
99 }
100 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
101
102 void hisi_sas_sata_done(struct sas_task *task,
103 struct hisi_sas_slot *slot)
104 {
105 struct task_status_struct *ts = &task->task_status;
106 struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
107 struct hisi_sas_status_buffer *status_buf =
108 hisi_sas_status_buf_addr_mem(slot);
109 u8 *iu = &status_buf->iu[0];
110 struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu;
111
112 resp->frame_len = sizeof(struct dev_to_host_fis);
113 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
114
115 ts->buf_valid_size = sizeof(*resp);
116 }
117 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
118
119 /*
120 * This function assumes linkrate mask fits in 8 bits, which it
121 * does for all HW versions supported.
122 */
123 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
124 {
125 u8 rate = 0;
126 int i;
127
128 max -= SAS_LINK_RATE_1_5_GBPS;
129 for (i = 0; i <= max; i++)
130 rate |= 1 << (i * 2);
131 return rate;
132 }
133 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
134
135 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
136 {
137 return device->port->ha->lldd_ha;
138 }
139
140 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
141 {
142 return container_of(sas_port, struct hisi_sas_port, sas_port);
143 }
144 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
145
146 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
147 {
148 int phy_no;
149
150 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
151 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
152 }
153 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
154
155 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
156 {
157 void *bitmap = hisi_hba->slot_index_tags;
158
159 __clear_bit(slot_idx, bitmap);
160 }
161
162 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
163 {
164 if (hisi_hba->hw->slot_index_alloc ||
165 slot_idx < HISI_SAS_RESERVED_IPTT) {
166 spin_lock(&hisi_hba->lock);
167 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
168 spin_unlock(&hisi_hba->lock);
169 }
170 }
171
172 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
173 {
174 void *bitmap = hisi_hba->slot_index_tags;
175
176 __set_bit(slot_idx, bitmap);
177 }
178
179 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
180 struct request *rq)
181 {
182 int index;
183 void *bitmap = hisi_hba->slot_index_tags;
184
185 if (rq)
186 return rq->tag + HISI_SAS_RESERVED_IPTT;
187
188 spin_lock(&hisi_hba->lock);
189 index = find_next_zero_bit(bitmap, HISI_SAS_RESERVED_IPTT,
190 hisi_hba->last_slot_index + 1);
191 if (index >= HISI_SAS_RESERVED_IPTT) {
192 index = find_next_zero_bit(bitmap,
193 HISI_SAS_RESERVED_IPTT,
194 0);
195 if (index >= HISI_SAS_RESERVED_IPTT) {
196 spin_unlock(&hisi_hba->lock);
197 return -SAS_QUEUE_FULL;
198 }
199 }
200 hisi_sas_slot_index_set(hisi_hba, index);
201 hisi_hba->last_slot_index = index;
202 spin_unlock(&hisi_hba->lock);
203
204 return index;
205 }
206
207 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
208 struct hisi_sas_slot *slot)
209 {
210 int device_id = slot->device_id;
211 struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
212
213 if (task) {
214 struct device *dev = hisi_hba->dev;
215
216 if (!task->lldd_task)
217 return;
218
219 task->lldd_task = NULL;
220
221 if (!sas_protocol_ata(task->task_proto)) {
222 if (slot->n_elem) {
223 if (task->task_proto & SAS_PROTOCOL_SSP)
224 dma_unmap_sg(dev, task->scatter,
225 task->num_scatter,
226 task->data_dir);
227 else
228 dma_unmap_sg(dev, &task->smp_task.smp_req,
229 1, DMA_TO_DEVICE);
230 }
231 if (slot->n_elem_dif) {
232 struct sas_ssp_task *ssp_task = &task->ssp_task;
233 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
234
235 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
236 scsi_prot_sg_count(scsi_cmnd),
237 task->data_dir);
238 }
239 }
240 }
241
242 spin_lock(&sas_dev->lock);
243 list_del_init(&slot->entry);
244 spin_unlock(&sas_dev->lock);
245
246 memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
247
248 hisi_sas_slot_index_free(hisi_hba, slot->idx);
249 }
250 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
251
252 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
253 struct hisi_sas_slot *slot)
254 {
255 hisi_hba->hw->prep_smp(hisi_hba, slot);
256 }
257
258 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
259 struct hisi_sas_slot *slot)
260 {
261 hisi_hba->hw->prep_ssp(hisi_hba, slot);
262 }
263
264 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
265 struct hisi_sas_slot *slot)
266 {
267 hisi_hba->hw->prep_stp(hisi_hba, slot);
268 }
269
270 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
271 struct hisi_sas_slot *slot)
272 {
273 hisi_hba->hw->prep_abort(hisi_hba, slot);
274 }
275
276 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
277 struct sas_task *task, int n_elem)
278 {
279 struct device *dev = hisi_hba->dev;
280
281 if (!sas_protocol_ata(task->task_proto) && n_elem) {
282 if (task->num_scatter) {
283 dma_unmap_sg(dev, task->scatter, task->num_scatter,
284 task->data_dir);
285 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
286 dma_unmap_sg(dev, &task->smp_task.smp_req,
287 1, DMA_TO_DEVICE);
288 }
289 }
290 }
291
292 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
293 struct sas_task *task, int *n_elem)
294 {
295 struct device *dev = hisi_hba->dev;
296 int rc;
297
298 if (sas_protocol_ata(task->task_proto)) {
299 *n_elem = task->num_scatter;
300 } else {
301 unsigned int req_len;
302
303 if (task->num_scatter) {
304 *n_elem = dma_map_sg(dev, task->scatter,
305 task->num_scatter, task->data_dir);
306 if (!*n_elem) {
307 rc = -ENOMEM;
308 goto prep_out;
309 }
310 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
311 *n_elem = dma_map_sg(dev, &task->smp_task.smp_req,
312 1, DMA_TO_DEVICE);
313 if (!*n_elem) {
314 rc = -ENOMEM;
315 goto prep_out;
316 }
317 req_len = sg_dma_len(&task->smp_task.smp_req);
318 if (req_len & 0x3) {
319 rc = -EINVAL;
320 goto err_out_dma_unmap;
321 }
322 }
323 }
324
325 if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
326 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
327 *n_elem);
328 rc = -EINVAL;
329 goto err_out_dma_unmap;
330 }
331 return 0;
332
333 err_out_dma_unmap:
334 /* It would be better to call dma_unmap_sg() here, but it's messy */
335 hisi_sas_dma_unmap(hisi_hba, task, *n_elem);
336 prep_out:
337 return rc;
338 }
339
340 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
341 struct sas_task *task, int n_elem_dif)
342 {
343 struct device *dev = hisi_hba->dev;
344
345 if (n_elem_dif) {
346 struct sas_ssp_task *ssp_task = &task->ssp_task;
347 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
348
349 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
350 scsi_prot_sg_count(scsi_cmnd),
351 task->data_dir);
352 }
353 }
354
355 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
356 int *n_elem_dif, struct sas_task *task)
357 {
358 struct device *dev = hisi_hba->dev;
359 struct sas_ssp_task *ssp_task;
360 struct scsi_cmnd *scsi_cmnd;
361 int rc;
362
363 if (task->num_scatter) {
364 ssp_task = &task->ssp_task;
365 scsi_cmnd = ssp_task->cmd;
366
367 if (scsi_prot_sg_count(scsi_cmnd)) {
368 *n_elem_dif = dma_map_sg(dev,
369 scsi_prot_sglist(scsi_cmnd),
370 scsi_prot_sg_count(scsi_cmnd),
371 task->data_dir);
372
373 if (!*n_elem_dif)
374 return -ENOMEM;
375
376 if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
377 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
378 *n_elem_dif);
379 rc = -EINVAL;
380 goto err_out_dif_dma_unmap;
381 }
382 }
383 }
384
385 return 0;
386
387 err_out_dif_dma_unmap:
388 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
389 scsi_prot_sg_count(scsi_cmnd), task->data_dir);
390 return rc;
391 }
392
393 static
394 void hisi_sas_task_deliver(struct hisi_hba *hisi_hba,
395 struct hisi_sas_slot *slot,
396 struct hisi_sas_dq *dq,
397 struct hisi_sas_device *sas_dev)
398 {
399 struct hisi_sas_cmd_hdr *cmd_hdr_base;
400 int dlvry_queue_slot, dlvry_queue;
401 struct sas_task *task = slot->task;
402 int wr_q_index;
403
404 spin_lock(&dq->lock);
405 wr_q_index = dq->wr_point;
406 dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
407 list_add_tail(&slot->delivery, &dq->list);
408 spin_unlock(&dq->lock);
409 spin_lock(&sas_dev->lock);
410 list_add_tail(&slot->entry, &sas_dev->list);
411 spin_unlock(&sas_dev->lock);
412
413 dlvry_queue = dq->id;
414 dlvry_queue_slot = wr_q_index;
415
416 slot->device_id = sas_dev->device_id;
417 slot->dlvry_queue = dlvry_queue;
418 slot->dlvry_queue_slot = dlvry_queue_slot;
419 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
420 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
421
422 task->lldd_task = slot;
423
424 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
425 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
426 memset(hisi_sas_status_buf_addr_mem(slot), 0,
427 sizeof(struct hisi_sas_err_record));
428
429 switch (task->task_proto) {
430 case SAS_PROTOCOL_SMP:
431 hisi_sas_task_prep_smp(hisi_hba, slot);
432 break;
433 case SAS_PROTOCOL_SSP:
434 hisi_sas_task_prep_ssp(hisi_hba, slot);
435 break;
436 case SAS_PROTOCOL_SATA:
437 case SAS_PROTOCOL_STP:
438 case SAS_PROTOCOL_STP_ALL:
439 hisi_sas_task_prep_ata(hisi_hba, slot);
440 break;
441 case SAS_PROTOCOL_INTERNAL_ABORT:
442 hisi_sas_task_prep_abort(hisi_hba, slot);
443 break;
444 default:
445 return;
446 }
447
448 /* Make slot memories observable before marking as ready */
449 smp_wmb();
450 WRITE_ONCE(slot->ready, 1);
451
452 spin_lock(&dq->lock);
453 hisi_hba->hw->start_delivery(dq);
454 spin_unlock(&dq->lock);
455 }
456
457 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
458 {
459 int n_elem = 0, n_elem_dif = 0;
460 struct domain_device *device = task->dev;
461 struct asd_sas_port *sas_port = device->port;
462 struct hisi_sas_device *sas_dev = device->lldd_dev;
463 bool internal_abort = sas_is_internal_abort(task);
464 struct hisi_sas_dq *dq = NULL;
465 struct hisi_sas_port *port;
466 struct hisi_hba *hisi_hba;
467 struct hisi_sas_slot *slot;
468 struct request *rq = NULL;
469 struct device *dev;
470 int rc;
471
472 if (!sas_port) {
473 struct task_status_struct *ts = &task->task_status;
474
475 ts->resp = SAS_TASK_UNDELIVERED;
476 ts->stat = SAS_PHY_DOWN;
477 /*
478 * libsas will use dev->port, should
479 * not call task_done for sata
480 */
481 if (device->dev_type != SAS_SATA_DEV && !internal_abort)
482 task->task_done(task);
483 return -ECOMM;
484 }
485
486 hisi_hba = dev_to_hisi_hba(device);
487 dev = hisi_hba->dev;
488
489 switch (task->task_proto) {
490 case SAS_PROTOCOL_SSP:
491 case SAS_PROTOCOL_SMP:
492 case SAS_PROTOCOL_SATA:
493 case SAS_PROTOCOL_STP:
494 case SAS_PROTOCOL_STP_ALL:
495 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
496 if (!gfpflags_allow_blocking(gfp_flags))
497 return -EINVAL;
498
499 down(&hisi_hba->sem);
500 up(&hisi_hba->sem);
501 }
502
503 if (DEV_IS_GONE(sas_dev)) {
504 if (sas_dev)
505 dev_info(dev, "task prep: device %d not ready\n",
506 sas_dev->device_id);
507 else
508 dev_info(dev, "task prep: device %016llx not ready\n",
509 SAS_ADDR(device->sas_addr));
510
511 return -ECOMM;
512 }
513
514 port = to_hisi_sas_port(sas_port);
515 if (!port->port_attached) {
516 dev_info(dev, "task prep: %s port%d not attach device\n",
517 dev_is_sata(device) ? "SATA/STP" : "SAS",
518 device->port->id);
519
520 return -ECOMM;
521 }
522
523 rq = sas_task_find_rq(task);
524 if (rq) {
525 unsigned int dq_index;
526 u32 blk_tag;
527
528 blk_tag = blk_mq_unique_tag(rq);
529 dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
530 dq = &hisi_hba->dq[dq_index];
531 } else {
532 struct Scsi_Host *shost = hisi_hba->shost;
533 struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
534 int queue = qmap->mq_map[raw_smp_processor_id()];
535
536 dq = &hisi_hba->dq[queue];
537 }
538 break;
539 case SAS_PROTOCOL_INTERNAL_ABORT:
540 if (!hisi_hba->hw->prep_abort)
541 return TMF_RESP_FUNC_FAILED;
542
543 if (test_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags))
544 return -EIO;
545
546 hisi_hba = dev_to_hisi_hba(device);
547
548 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
549 return -EINVAL;
550
551 port = to_hisi_sas_port(sas_port);
552 dq = &hisi_hba->dq[task->abort_task.qid];
553 break;
554 default:
555 dev_err(hisi_hba->dev, "task prep: unknown/unsupported proto (0x%x)\n",
556 task->task_proto);
557 return -EINVAL;
558 }
559
560 rc = hisi_sas_dma_map(hisi_hba, task, &n_elem);
561 if (rc < 0)
562 goto prep_out;
563
564 if (!sas_protocol_ata(task->task_proto)) {
565 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
566 if (rc < 0)
567 goto err_out_dma_unmap;
568 }
569
570 if (!internal_abort && hisi_hba->hw->slot_index_alloc)
571 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
572 else
573 rc = hisi_sas_slot_index_alloc(hisi_hba, rq);
574
575 if (rc < 0)
576 goto err_out_dif_dma_unmap;
577
578 slot = &hisi_hba->slot_info[rc];
579 slot->n_elem = n_elem;
580 slot->n_elem_dif = n_elem_dif;
581 slot->task = task;
582 slot->port = port;
583
584 slot->tmf = task->tmf;
585 slot->is_internal = !!task->tmf || internal_abort;
586
587 /* protect task_prep and start_delivery sequence */
588 hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev);
589
590 return 0;
591
592 err_out_dif_dma_unmap:
593 if (!sas_protocol_ata(task->task_proto))
594 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
595 err_out_dma_unmap:
596 hisi_sas_dma_unmap(hisi_hba, task, n_elem);
597 prep_out:
598 dev_err(dev, "task exec: failed[%d]!\n", rc);
599 return rc;
600 }
601
602 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no,
603 gfp_t gfp_flags)
604 {
605 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
606 struct asd_sas_phy *sas_phy = &phy->sas_phy;
607
608 if (!phy->phy_attached)
609 return;
610
611 sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
612
613 if (sas_phy->phy) {
614 struct sas_phy *sphy = sas_phy->phy;
615
616 sphy->negotiated_linkrate = sas_phy->linkrate;
617 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
618 sphy->maximum_linkrate_hw =
619 hisi_hba->hw->phy_get_max_linkrate();
620 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
621 sphy->minimum_linkrate = phy->minimum_linkrate;
622
623 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
624 sphy->maximum_linkrate = phy->maximum_linkrate;
625 }
626
627 if (phy->phy_type & PORT_TYPE_SAS) {
628 struct sas_identify_frame *id;
629
630 id = (struct sas_identify_frame *)phy->frame_rcvd;
631 id->dev_type = phy->identify.device_type;
632 id->initiator_bits = SAS_PROTOCOL_ALL;
633 id->target_bits = phy->identify.target_port_protocols;
634 } else if (phy->phy_type & PORT_TYPE_SATA) {
635 /* Nothing */
636 }
637
638 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
639 sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
640 }
641
642 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
643 {
644 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
645 struct hisi_sas_device *sas_dev = NULL;
646 int last = hisi_hba->last_dev_id;
647 int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
648 int i;
649
650 spin_lock(&hisi_hba->lock);
651 for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
652 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
653 int queue = i % hisi_hba->queue_count;
654 struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
655
656 hisi_hba->devices[i].device_id = i;
657 sas_dev = &hisi_hba->devices[i];
658 sas_dev->dev_status = HISI_SAS_DEV_INIT;
659 sas_dev->dev_type = device->dev_type;
660 sas_dev->hisi_hba = hisi_hba;
661 sas_dev->sas_device = device;
662 sas_dev->dq = dq;
663 spin_lock_init(&sas_dev->lock);
664 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
665 break;
666 }
667 i++;
668 }
669 hisi_hba->last_dev_id = i;
670 spin_unlock(&hisi_hba->lock);
671
672 return sas_dev;
673 }
674
675 static void hisi_sas_tmf_aborted(struct sas_task *task)
676 {
677 struct hisi_sas_slot *slot = task->lldd_task;
678 struct domain_device *device = task->dev;
679 struct hisi_sas_device *sas_dev = device->lldd_dev;
680 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
681
682 if (slot) {
683 struct hisi_sas_cq *cq =
684 &hisi_hba->cq[slot->dlvry_queue];
685 /*
686 * sync irq to avoid free'ing task
687 * before using task in IO completion
688 */
689 synchronize_irq(cq->irq_no);
690 slot->task = NULL;
691 }
692 }
693
694 #define HISI_SAS_DISK_RECOVER_CNT 3
695 static int hisi_sas_init_device(struct domain_device *device)
696 {
697 int rc = TMF_RESP_FUNC_COMPLETE;
698 struct scsi_lun lun;
699 int retry = HISI_SAS_DISK_RECOVER_CNT;
700 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
701
702 switch (device->dev_type) {
703 case SAS_END_DEVICE:
704 int_to_scsilun(0, &lun);
705
706 while (retry-- > 0) {
707 rc = sas_abort_task_set(device, lun.scsi_lun);
708 if (rc == TMF_RESP_FUNC_COMPLETE) {
709 hisi_sas_release_task(hisi_hba, device);
710 break;
711 }
712 }
713 break;
714 case SAS_SATA_DEV:
715 case SAS_SATA_PM:
716 case SAS_SATA_PM_PORT:
717 case SAS_SATA_PENDING:
718 /*
719 * If an expander is swapped when a SATA disk is attached then
720 * we should issue a hard reset to clear previous affiliation
721 * of STP target port, see SPL (chapter 6.19.4).
722 *
723 * However we don't need to issue a hard reset here for these
724 * reasons:
725 * a. When probing the device, libsas/libata already issues a
726 * hard reset in sas_probe_sata() -> ata_sas_async_probe().
727 * Note that in hisi_sas_debug_I_T_nexus_reset() we take care
728 * to issue a hard reset by checking the dev status (== INIT).
729 * b. When resetting the controller, this is simply unnecessary.
730 */
731 while (retry-- > 0) {
732 rc = hisi_sas_softreset_ata_disk(device);
733 if (!rc)
734 break;
735 }
736 break;
737 default:
738 break;
739 }
740
741 return rc;
742 }
743
744 int hisi_sas_slave_alloc(struct scsi_device *sdev)
745 {
746 struct domain_device *ddev = sdev_to_domain_dev(sdev);
747 struct hisi_sas_device *sas_dev = ddev->lldd_dev;
748 int rc;
749
750 rc = sas_slave_alloc(sdev);
751 if (rc)
752 return rc;
753
754 rc = hisi_sas_init_device(ddev);
755 if (rc)
756 return rc;
757 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
758 return 0;
759 }
760 EXPORT_SYMBOL_GPL(hisi_sas_slave_alloc);
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
786 phy_no = sas_find_attached_phy_id(&parent_dev->ex_dev, device);
787 if (phy_no < 0) {
788 dev_info(dev, "dev found: no attached "
789 "dev:%016llx at ex:%016llx\n",
790 SAS_ADDR(device->sas_addr),
791 SAS_ADDR(parent_dev->sas_addr));
792 rc = phy_no;
793 goto err_out;
794 }
795 }
796
797 dev_info(dev, "dev[%d:%x] found\n",
798 sas_dev->device_id, sas_dev->dev_type);
799
800 return 0;
801
802 err_out:
803 hisi_sas_dev_gone(device);
804 return rc;
805 }
806
807 int hisi_sas_slave_configure(struct scsi_device *sdev)
808 {
809 struct domain_device *dev = sdev_to_domain_dev(sdev);
810 int ret = sas_slave_configure(sdev);
811
812 if (ret)
813 return ret;
814 if (!dev_is_sata(dev))
815 sas_change_queue_depth(sdev, 64);
816
817 return 0;
818 }
819 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
820
821 void hisi_sas_scan_start(struct Scsi_Host *shost)
822 {
823 struct hisi_hba *hisi_hba = shost_priv(shost);
824
825 hisi_hba->hw->phys_init(hisi_hba);
826 }
827 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
828
829 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
830 {
831 struct hisi_hba *hisi_hba = shost_priv(shost);
832 struct sas_ha_struct *sha = &hisi_hba->sha;
833
834 /* Wait for PHY up interrupt to occur */
835 if (time < HZ)
836 return 0;
837
838 sas_drain_work(sha);
839 return 1;
840 }
841 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
842
843 static void hisi_sas_phyup_work_common(struct work_struct *work,
844 enum hisi_sas_phy_event event)
845 {
846 struct hisi_sas_phy *phy =
847 container_of(work, typeof(*phy), works[event]);
848 struct hisi_hba *hisi_hba = phy->hisi_hba;
849 struct asd_sas_phy *sas_phy = &phy->sas_phy;
850 int phy_no = sas_phy->id;
851
852 phy->wait_phyup_cnt = 0;
853 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
854 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
855 hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
856 }
857
858 static void hisi_sas_phyup_work(struct work_struct *work)
859 {
860 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);
861 }
862
863 static void hisi_sas_linkreset_work(struct work_struct *work)
864 {
865 struct hisi_sas_phy *phy =
866 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
867 struct asd_sas_phy *sas_phy = &phy->sas_phy;
868
869 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
870 }
871
872 static void hisi_sas_phyup_pm_work(struct work_struct *work)
873 {
874 struct hisi_sas_phy *phy =
875 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);
876 struct hisi_hba *hisi_hba = phy->hisi_hba;
877 struct device *dev = hisi_hba->dev;
878
879 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);
880 pm_runtime_put_sync(dev);
881 }
882
883 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
884 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
885 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
886 [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,
887 };
888
889 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
890 enum hisi_sas_phy_event event)
891 {
892 struct hisi_hba *hisi_hba = phy->hisi_hba;
893
894 if (WARN_ON(event >= HISI_PHYES_NUM))
895 return false;
896
897 return queue_work(hisi_hba->wq, &phy->works[event]);
898 }
899 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
900
901 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
902 {
903 struct hisi_sas_phy *phy = from_timer(phy, t, timer);
904 struct hisi_hba *hisi_hba = phy->hisi_hba;
905 struct device *dev = hisi_hba->dev;
906 int phy_no = phy->sas_phy.id;
907
908 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
909 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
910 }
911
912 #define HISI_SAS_WAIT_PHYUP_RETRIES 10
913
914 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
915 {
916 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
917 struct device *dev = hisi_hba->dev;
918 unsigned long flags;
919
920 dev_dbg(dev, "phy%d OOB ready\n", phy_no);
921 spin_lock_irqsave(&phy->lock, flags);
922 if (phy->phy_attached) {
923 spin_unlock_irqrestore(&phy->lock, flags);
924 return;
925 }
926
927 if (!timer_pending(&phy->timer)) {
928 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
929 phy->wait_phyup_cnt++;
930 phy->timer.expires = jiffies +
931 HISI_SAS_WAIT_PHYUP_TIMEOUT;
932 add_timer(&phy->timer);
933 spin_unlock_irqrestore(&phy->lock, flags);
934 return;
935 }
936
937 dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
938 phy_no, phy->wait_phyup_cnt);
939 phy->wait_phyup_cnt = 0;
940 }
941 spin_unlock_irqrestore(&phy->lock, flags);
942 }
943
944 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
945
946 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
947 {
948 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
949 struct asd_sas_phy *sas_phy = &phy->sas_phy;
950 int i;
951
952 phy->hisi_hba = hisi_hba;
953 phy->port = NULL;
954 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
955 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
956 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
957 sas_phy->class = SAS;
958 sas_phy->iproto = SAS_PROTOCOL_ALL;
959 sas_phy->tproto = 0;
960 sas_phy->type = PHY_TYPE_PHYSICAL;
961 sas_phy->role = PHY_ROLE_INITIATOR;
962 sas_phy->oob_mode = OOB_NOT_CONNECTED;
963 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
964 sas_phy->id = phy_no;
965 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
966 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
967 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
968 sas_phy->lldd_phy = phy;
969
970 for (i = 0; i < HISI_PHYES_NUM; i++)
971 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
972
973 spin_lock_init(&phy->lock);
974
975 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
976 }
977
978 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
979 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
980 {
981 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
982 struct asd_sas_phy *aphy = &phy->sas_phy;
983 struct sas_phy *sphy = aphy->phy;
984 unsigned long flags;
985
986 spin_lock_irqsave(&phy->lock, flags);
987
988 if (enable) {
989 /* We may have been enabled already; if so, don't touch */
990 if (!phy->enable)
991 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
992 hisi_hba->hw->phy_start(hisi_hba, phy_no);
993 } else {
994 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
995 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
996 }
997 phy->enable = enable;
998 spin_unlock_irqrestore(&phy->lock, flags);
999 }
1000 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
1001
1002 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
1003 {
1004 struct sas_ha_struct *sas_ha = sas_phy->ha;
1005 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1006 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1007 struct asd_sas_port *sas_port = sas_phy->port;
1008 struct hisi_sas_port *port;
1009 unsigned long flags;
1010
1011 if (!sas_port)
1012 return;
1013
1014 port = to_hisi_sas_port(sas_port);
1015 spin_lock_irqsave(&hisi_hba->lock, flags);
1016 port->port_attached = 1;
1017 port->id = phy->port_id;
1018 phy->port = port;
1019 sas_port->lldd_port = port;
1020 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1021 }
1022
1023 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1024 struct hisi_sas_slot *slot)
1025 {
1026 if (task) {
1027 unsigned long flags;
1028 struct task_status_struct *ts;
1029
1030 ts = &task->task_status;
1031
1032 ts->resp = SAS_TASK_COMPLETE;
1033 ts->stat = SAS_ABORTED_TASK;
1034 spin_lock_irqsave(&task->task_state_lock, flags);
1035 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1036 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1037 task->task_state_flags |= SAS_TASK_STATE_DONE;
1038 spin_unlock_irqrestore(&task->task_state_lock, flags);
1039 }
1040
1041 hisi_sas_slot_task_free(hisi_hba, task, slot);
1042 }
1043
1044 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1045 struct domain_device *device)
1046 {
1047 struct hisi_sas_slot *slot, *slot2;
1048 struct hisi_sas_device *sas_dev = device->lldd_dev;
1049
1050 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1051 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
1052 }
1053
1054 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1055 {
1056 struct hisi_sas_device *sas_dev;
1057 struct domain_device *device;
1058 int i;
1059
1060 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1061 sas_dev = &hisi_hba->devices[i];
1062 device = sas_dev->sas_device;
1063
1064 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1065 !device)
1066 continue;
1067
1068 hisi_sas_release_task(hisi_hba, device);
1069 }
1070 }
1071 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1072
1073 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1074 struct domain_device *device)
1075 {
1076 if (hisi_hba->hw->dereg_device)
1077 hisi_hba->hw->dereg_device(hisi_hba, device);
1078 }
1079
1080 static int
1081 hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev,
1082 bool rst_ha_timeout)
1083 {
1084 struct hisi_sas_internal_abort_data data = { rst_ha_timeout };
1085 struct domain_device *device = sas_dev->sas_device;
1086 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1087 int i, rc;
1088
1089 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
1090 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1091 const struct cpumask *mask = cq->irq_mask;
1092
1093 if (mask && !cpumask_intersects(cpu_online_mask, mask))
1094 continue;
1095 rc = sas_execute_internal_abort_dev(device, i, &data);
1096 if (rc)
1097 return rc;
1098 }
1099
1100 return 0;
1101 }
1102
1103 static void hisi_sas_dev_gone(struct domain_device *device)
1104 {
1105 struct hisi_sas_device *sas_dev = device->lldd_dev;
1106 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1107 struct device *dev = hisi_hba->dev;
1108 int ret = 0;
1109
1110 dev_info(dev, "dev[%d:%x] is gone\n",
1111 sas_dev->device_id, sas_dev->dev_type);
1112
1113 down(&hisi_hba->sem);
1114 if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1115 hisi_sas_internal_task_abort_dev(sas_dev, true);
1116
1117 hisi_sas_dereg_device(hisi_hba, device);
1118
1119 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1120 device->lldd_dev = NULL;
1121 }
1122
1123 if (hisi_hba->hw->free_device)
1124 hisi_hba->hw->free_device(sas_dev);
1125
1126 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1127 if (!ret)
1128 sas_dev->dev_type = SAS_PHY_UNUSED;
1129 sas_dev->sas_device = NULL;
1130 up(&hisi_hba->sem);
1131 }
1132
1133 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1134 struct sas_phy_linkrates *r)
1135 {
1136 struct sas_phy_linkrates _r;
1137
1138 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1139 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1140 enum sas_linkrate min, max;
1141
1142 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1143 return -EINVAL;
1144
1145 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1146 max = sas_phy->phy->maximum_linkrate;
1147 min = r->minimum_linkrate;
1148 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1149 max = r->maximum_linkrate;
1150 min = sas_phy->phy->minimum_linkrate;
1151 } else
1152 return -EINVAL;
1153
1154 _r.maximum_linkrate = max;
1155 _r.minimum_linkrate = min;
1156
1157 sas_phy->phy->maximum_linkrate = max;
1158 sas_phy->phy->minimum_linkrate = min;
1159
1160 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1161 msleep(100);
1162 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1163 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1164
1165 return 0;
1166 }
1167
1168 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1169 void *funcdata)
1170 {
1171 struct hisi_sas_phy *phy = container_of(sas_phy,
1172 struct hisi_sas_phy, sas_phy);
1173 struct sas_ha_struct *sas_ha = sas_phy->ha;
1174 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1175 struct device *dev = hisi_hba->dev;
1176 DECLARE_COMPLETION_ONSTACK(completion);
1177 int phy_no = sas_phy->id;
1178 u8 sts = phy->phy_attached;
1179 int ret = 0;
1180
1181 down(&hisi_hba->sem);
1182 phy->reset_completion = &completion;
1183
1184 switch (func) {
1185 case PHY_FUNC_HARD_RESET:
1186 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1187 break;
1188
1189 case PHY_FUNC_LINK_RESET:
1190 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1191 msleep(100);
1192 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1193 break;
1194
1195 case PHY_FUNC_DISABLE:
1196 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1197 goto out;
1198
1199 case PHY_FUNC_SET_LINK_RATE:
1200 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1201 break;
1202
1203 case PHY_FUNC_GET_EVENTS:
1204 if (hisi_hba->hw->get_events) {
1205 hisi_hba->hw->get_events(hisi_hba, phy_no);
1206 goto out;
1207 }
1208 fallthrough;
1209 case PHY_FUNC_RELEASE_SPINUP_HOLD:
1210 default:
1211 ret = -EOPNOTSUPP;
1212 goto out;
1213 }
1214
1215 if (sts && !wait_for_completion_timeout(&completion,
1216 HISI_SAS_WAIT_PHYUP_TIMEOUT)) {
1217 dev_warn(dev, "phy%d wait phyup timed out for func %d\n",
1218 phy_no, func);
1219 if (phy->in_reset)
1220 ret = -ETIMEDOUT;
1221 }
1222
1223 out:
1224 phy->reset_completion = NULL;
1225
1226 up(&hisi_hba->sem);
1227 return ret;
1228 }
1229
1230 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1231 bool reset, int pmp, u8 *fis)
1232 {
1233 struct ata_taskfile tf;
1234
1235 ata_tf_init(dev, &tf);
1236 if (reset)
1237 tf.ctl |= ATA_SRST;
1238 else
1239 tf.ctl &= ~ATA_SRST;
1240 tf.command = ATA_CMD_DEV_RESET;
1241 ata_tf_to_fis(&tf, pmp, 0, fis);
1242 }
1243
1244 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1245 {
1246 u8 fis[20] = {0};
1247 struct ata_port *ap = device->sata_dev.ap;
1248 struct ata_link *link;
1249 int rc = TMF_RESP_FUNC_FAILED;
1250 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1251 struct device *dev = hisi_hba->dev;
1252
1253 ata_for_each_link(link, ap, EDGE) {
1254 int pmp = sata_srst_pmp(link);
1255
1256 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1257 rc = sas_execute_ata_cmd(device, fis, -1);
1258 if (rc != TMF_RESP_FUNC_COMPLETE)
1259 break;
1260 }
1261
1262 if (rc == TMF_RESP_FUNC_COMPLETE) {
1263 ata_for_each_link(link, ap, EDGE) {
1264 int pmp = sata_srst_pmp(link);
1265
1266 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1267 rc = sas_execute_ata_cmd(device, fis, -1);
1268 if (rc != TMF_RESP_FUNC_COMPLETE)
1269 dev_err(dev, "ata disk %016llx de-reset failed\n",
1270 SAS_ADDR(device->sas_addr));
1271 }
1272 } else {
1273 dev_err(dev, "ata disk %016llx reset failed\n",
1274 SAS_ADDR(device->sas_addr));
1275 }
1276
1277 if (rc == TMF_RESP_FUNC_COMPLETE)
1278 hisi_sas_release_task(hisi_hba, device);
1279
1280 return rc;
1281 }
1282
1283 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1284 {
1285 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1286 int i;
1287
1288 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1289 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1290 struct domain_device *device = sas_dev->sas_device;
1291 struct asd_sas_port *sas_port;
1292 struct hisi_sas_port *port;
1293 struct hisi_sas_phy *phy = NULL;
1294 struct asd_sas_phy *sas_phy;
1295
1296 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1297 || !device || !device->port)
1298 continue;
1299
1300 sas_port = device->port;
1301 port = to_hisi_sas_port(sas_port);
1302
1303 spin_lock(&sas_port->phy_list_lock);
1304 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1305 if (state & BIT(sas_phy->id)) {
1306 phy = sas_phy->lldd_phy;
1307 break;
1308 }
1309 spin_unlock(&sas_port->phy_list_lock);
1310
1311 if (phy) {
1312 port->id = phy->port_id;
1313
1314 /* Update linkrate of directly attached device. */
1315 if (!device->parent)
1316 device->linkrate = phy->sas_phy.linkrate;
1317
1318 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1319 } else if (!port->port_attached)
1320 port->id = 0xff;
1321 }
1322 }
1323
1324 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1325 {
1326 struct asd_sas_port *_sas_port = NULL;
1327 int phy_no;
1328
1329 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1330 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1331 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1332 struct asd_sas_port *sas_port = sas_phy->port;
1333 bool do_port_check = _sas_port != sas_port;
1334
1335 if (!sas_phy->phy->enabled)
1336 continue;
1337
1338 /* Report PHY state change to libsas */
1339 if (state & BIT(phy_no)) {
1340 if (do_port_check && sas_port && sas_port->port_dev) {
1341 struct domain_device *dev = sas_port->port_dev;
1342
1343 _sas_port = sas_port;
1344
1345 if (dev_is_expander(dev->dev_type))
1346 sas_notify_port_event(sas_phy,
1347 PORTE_BROADCAST_RCVD,
1348 GFP_KERNEL);
1349 }
1350 } else {
1351 hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1352 }
1353 }
1354 }
1355
1356 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1357 {
1358 struct hisi_sas_device *sas_dev;
1359 struct domain_device *device;
1360 int i;
1361
1362 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1363 sas_dev = &hisi_hba->devices[i];
1364 device = sas_dev->sas_device;
1365
1366 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1367 continue;
1368
1369 hisi_sas_init_device(device);
1370 }
1371 }
1372
1373 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1374 struct asd_sas_port *sas_port,
1375 struct domain_device *device)
1376 {
1377 struct ata_port *ap = device->sata_dev.ap;
1378 struct device *dev = hisi_hba->dev;
1379 int rc = TMF_RESP_FUNC_FAILED;
1380 struct ata_link *link;
1381 u8 fis[20] = {0};
1382 int i;
1383
1384 for (i = 0; i < hisi_hba->n_phy; i++) {
1385 if (!(sas_port->phy_mask & BIT(i)))
1386 continue;
1387
1388 ata_for_each_link(link, ap, EDGE) {
1389 int pmp = sata_srst_pmp(link);
1390
1391 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1392 rc = sas_execute_ata_cmd(device, fis, i);
1393 if (rc != TMF_RESP_FUNC_COMPLETE) {
1394 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1395 i, rc);
1396 break;
1397 }
1398 }
1399 }
1400 }
1401
1402 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1403 {
1404 struct device *dev = hisi_hba->dev;
1405 int port_no, rc, i;
1406
1407 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1408 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1409 struct domain_device *device = sas_dev->sas_device;
1410
1411 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1412 continue;
1413
1414 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1415 if (rc < 0)
1416 dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1417 }
1418
1419 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1420 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1421 struct asd_sas_port *sas_port = &port->sas_port;
1422 struct domain_device *port_dev = sas_port->port_dev;
1423 struct domain_device *device;
1424
1425 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1426 continue;
1427
1428 /* Try to find a SATA device */
1429 list_for_each_entry(device, &sas_port->dev_list,
1430 dev_list_node) {
1431 if (dev_is_sata(device)) {
1432 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1433 sas_port,
1434 device);
1435 break;
1436 }
1437 }
1438 }
1439 }
1440
1441 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1442 {
1443 struct Scsi_Host *shost = hisi_hba->shost;
1444
1445 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1446
1447 scsi_block_requests(shost);
1448 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1449
1450 del_timer_sync(&hisi_hba->timer);
1451
1452 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1453 }
1454 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1455
1456 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1457 {
1458 struct Scsi_Host *shost = hisi_hba->shost;
1459
1460 /* Init and wait for PHYs to come up and all libsas event finished. */
1461 hisi_hba->hw->phys_init(hisi_hba);
1462 msleep(1000);
1463 hisi_sas_refresh_port_id(hisi_hba);
1464 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1465
1466 if (hisi_hba->reject_stp_links_msk)
1467 hisi_sas_terminate_stp_reject(hisi_hba);
1468 hisi_sas_reset_init_all_devices(hisi_hba);
1469 scsi_unblock_requests(shost);
1470 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1471 up(&hisi_hba->sem);
1472
1473 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1474 }
1475 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1476
1477 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1478 {
1479 if (!hisi_hba->hw->soft_reset)
1480 return -1;
1481
1482 down(&hisi_hba->sem);
1483 if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1484 up(&hisi_hba->sem);
1485 return -1;
1486 }
1487
1488 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1489 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1490
1491 return 0;
1492 }
1493
1494 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1495 {
1496 struct device *dev = hisi_hba->dev;
1497 struct Scsi_Host *shost = hisi_hba->shost;
1498 int rc;
1499
1500 dev_info(dev, "controller resetting...\n");
1501 hisi_sas_controller_reset_prepare(hisi_hba);
1502
1503 rc = hisi_hba->hw->soft_reset(hisi_hba);
1504 if (rc) {
1505 dev_warn(dev, "controller reset failed (%d)\n", rc);
1506 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1507 up(&hisi_hba->sem);
1508 scsi_unblock_requests(shost);
1509 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1510 return rc;
1511 }
1512 clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1513
1514 hisi_sas_controller_reset_done(hisi_hba);
1515 dev_info(dev, "controller reset complete\n");
1516
1517 return 0;
1518 }
1519
1520 static int hisi_sas_abort_task(struct sas_task *task)
1521 {
1522 struct hisi_sas_internal_abort_data internal_abort_data = { false };
1523 struct domain_device *device = task->dev;
1524 struct hisi_sas_device *sas_dev = device->lldd_dev;
1525 struct hisi_sas_slot *slot = task->lldd_task;
1526 struct hisi_hba *hisi_hba;
1527 struct device *dev;
1528 int rc = TMF_RESP_FUNC_FAILED;
1529 unsigned long flags;
1530
1531 if (!sas_dev)
1532 return TMF_RESP_FUNC_FAILED;
1533
1534 hisi_hba = dev_to_hisi_hba(task->dev);
1535 dev = hisi_hba->dev;
1536
1537 spin_lock_irqsave(&task->task_state_lock, flags);
1538 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1539 struct hisi_sas_cq *cq;
1540
1541 if (slot) {
1542 /*
1543 * sync irq to avoid free'ing task
1544 * before using task in IO completion
1545 */
1546 cq = &hisi_hba->cq[slot->dlvry_queue];
1547 synchronize_irq(cq->irq_no);
1548 }
1549 spin_unlock_irqrestore(&task->task_state_lock, flags);
1550 rc = TMF_RESP_FUNC_COMPLETE;
1551 goto out;
1552 }
1553 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1554 spin_unlock_irqrestore(&task->task_state_lock, flags);
1555
1556 if (slot && task->task_proto & SAS_PROTOCOL_SSP) {
1557 u16 tag = slot->idx;
1558 int rc2;
1559
1560 rc = sas_abort_task(task, tag);
1561 rc2 = sas_execute_internal_abort_single(device, tag,
1562 slot->dlvry_queue, &internal_abort_data);
1563 if (rc2 < 0) {
1564 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1565 return TMF_RESP_FUNC_FAILED;
1566 }
1567
1568 /*
1569 * If the TMF finds that the IO is not in the device and also
1570 * the internal abort does not succeed, then it is safe to
1571 * free the slot.
1572 * Note: if the internal abort succeeds then the slot
1573 * will have already been completed
1574 */
1575 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1576 if (task->lldd_task)
1577 hisi_sas_do_release_task(hisi_hba, task, slot);
1578 }
1579 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1580 task->task_proto & SAS_PROTOCOL_STP) {
1581 if (task->dev->dev_type == SAS_SATA_DEV) {
1582 struct ata_queued_cmd *qc = task->uldd_task;
1583
1584 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1585 if (rc < 0) {
1586 dev_err(dev, "abort task: internal abort failed\n");
1587 goto out;
1588 }
1589 hisi_sas_dereg_device(hisi_hba, device);
1590
1591 /*
1592 * If an ATA internal command times out in ATA EH, it
1593 * need to execute soft reset, so check the scsicmd
1594 */
1595 if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) &&
1596 qc && qc->scsicmd) {
1597 hisi_sas_do_release_task(hisi_hba, task, slot);
1598 rc = TMF_RESP_FUNC_COMPLETE;
1599 } else {
1600 rc = hisi_sas_softreset_ata_disk(device);
1601 }
1602 }
1603 } else if (slot && task->task_proto & SAS_PROTOCOL_SMP) {
1604 /* SMP */
1605 u32 tag = slot->idx;
1606 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1607
1608 rc = sas_execute_internal_abort_single(device,
1609 tag, slot->dlvry_queue,
1610 &internal_abort_data);
1611 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1612 task->lldd_task) {
1613 /*
1614 * sync irq to avoid free'ing task
1615 * before using task in IO completion
1616 */
1617 synchronize_irq(cq->irq_no);
1618 slot->task = NULL;
1619 }
1620 }
1621
1622 out:
1623 if (rc != TMF_RESP_FUNC_COMPLETE)
1624 dev_notice(dev, "abort task: rc=%d\n", rc);
1625 return rc;
1626 }
1627
1628 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1629 {
1630 struct hisi_sas_device *sas_dev = device->lldd_dev;
1631 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1632 struct device *dev = hisi_hba->dev;
1633 int rc;
1634
1635 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1636 if (rc < 0) {
1637 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1638 return TMF_RESP_FUNC_FAILED;
1639 }
1640 hisi_sas_dereg_device(hisi_hba, device);
1641
1642 rc = sas_abort_task_set(device, lun);
1643 if (rc == TMF_RESP_FUNC_COMPLETE)
1644 hisi_sas_release_task(hisi_hba, device);
1645
1646 return rc;
1647 }
1648
1649 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1650 {
1651 struct sas_phy *local_phy = sas_get_local_phy(device);
1652 struct hisi_sas_device *sas_dev = device->lldd_dev;
1653 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1654 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1655 int rc, reset_type;
1656
1657 if (!local_phy->enabled) {
1658 sas_put_local_phy(local_phy);
1659 return -ENODEV;
1660 }
1661
1662 if (scsi_is_sas_phy_local(local_phy)) {
1663 struct asd_sas_phy *sas_phy =
1664 sas_ha->sas_phy[local_phy->number];
1665 struct hisi_sas_phy *phy =
1666 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1667 unsigned long flags;
1668
1669 spin_lock_irqsave(&phy->lock, flags);
1670 phy->in_reset = 1;
1671 spin_unlock_irqrestore(&phy->lock, flags);
1672 }
1673
1674 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1675 !dev_is_sata(device)) ? true : false;
1676
1677 rc = sas_phy_reset(local_phy, reset_type);
1678 sas_put_local_phy(local_phy);
1679
1680 if (scsi_is_sas_phy_local(local_phy)) {
1681 struct asd_sas_phy *sas_phy =
1682 sas_ha->sas_phy[local_phy->number];
1683 struct hisi_sas_phy *phy =
1684 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1685 unsigned long flags;
1686
1687 spin_lock_irqsave(&phy->lock, flags);
1688 phy->in_reset = 0;
1689 spin_unlock_irqrestore(&phy->lock, flags);
1690
1691 /* report PHY down if timed out */
1692 if (rc == -ETIMEDOUT)
1693 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1694 return rc;
1695 }
1696
1697 /* Remote phy */
1698 if (rc)
1699 return rc;
1700
1701 if (dev_is_sata(device)) {
1702 struct ata_link *link = &device->sata_dev.ap->link;
1703
1704 rc = ata_wait_after_reset(link, HISI_SAS_WAIT_PHYUP_TIMEOUT,
1705 smp_ata_check_ready_type);
1706 } else {
1707 msleep(2000);
1708 }
1709
1710 return rc;
1711 }
1712
1713 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1714 {
1715 struct hisi_sas_device *sas_dev = device->lldd_dev;
1716 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1717 struct device *dev = hisi_hba->dev;
1718 int rc;
1719
1720 if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
1721 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1722
1723 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1724 if (rc < 0) {
1725 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1726 return TMF_RESP_FUNC_FAILED;
1727 }
1728 hisi_sas_dereg_device(hisi_hba, device);
1729
1730 rc = hisi_sas_debug_I_T_nexus_reset(device);
1731 if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) {
1732 struct sas_phy *local_phy;
1733
1734 rc = hisi_sas_softreset_ata_disk(device);
1735 switch (rc) {
1736 case -ECOMM:
1737 rc = -ENODEV;
1738 break;
1739 case TMF_RESP_FUNC_FAILED:
1740 case -EMSGSIZE:
1741 case -EIO:
1742 local_phy = sas_get_local_phy(device);
1743 rc = sas_phy_enable(local_phy, 0);
1744 if (!rc) {
1745 local_phy->enabled = 0;
1746 dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n",
1747 SAS_ADDR(device->sas_addr), rc);
1748 rc = -ENODEV;
1749 }
1750 sas_put_local_phy(local_phy);
1751 break;
1752 default:
1753 break;
1754 }
1755 }
1756
1757 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1758 hisi_sas_release_task(hisi_hba, device);
1759
1760 return rc;
1761 }
1762
1763 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1764 {
1765 struct hisi_sas_device *sas_dev = device->lldd_dev;
1766 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1767 struct device *dev = hisi_hba->dev;
1768 int rc = TMF_RESP_FUNC_FAILED;
1769
1770 /* Clear internal IO and then lu reset */
1771 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1772 if (rc < 0) {
1773 dev_err(dev, "lu_reset: internal abort failed\n");
1774 goto out;
1775 }
1776 hisi_sas_dereg_device(hisi_hba, device);
1777
1778 if (dev_is_sata(device)) {
1779 struct sas_phy *phy;
1780
1781 phy = sas_get_local_phy(device);
1782
1783 rc = sas_phy_reset(phy, true);
1784
1785 if (rc == 0)
1786 hisi_sas_release_task(hisi_hba, device);
1787 sas_put_local_phy(phy);
1788 } else {
1789 rc = sas_lu_reset(device, lun);
1790 if (rc == TMF_RESP_FUNC_COMPLETE)
1791 hisi_sas_release_task(hisi_hba, device);
1792 }
1793 out:
1794 if (rc != TMF_RESP_FUNC_COMPLETE)
1795 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1796 sas_dev->device_id, rc);
1797 return rc;
1798 }
1799
1800 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1801 {
1802 struct domain_device *device = data;
1803 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1804 int rc;
1805
1806 rc = hisi_sas_debug_I_T_nexus_reset(device);
1807 if (rc != TMF_RESP_FUNC_COMPLETE)
1808 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1809 SAS_ADDR(device->sas_addr), rc);
1810 }
1811
1812 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1813 {
1814 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1815 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1816 ASYNC_DOMAIN_EXCLUSIVE(async);
1817 int i;
1818
1819 queue_work(hisi_hba->wq, &r.work);
1820 wait_for_completion(r.completion);
1821 if (!r.done)
1822 return TMF_RESP_FUNC_FAILED;
1823
1824 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1825 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1826 struct domain_device *device = sas_dev->sas_device;
1827
1828 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1829 dev_is_expander(device->dev_type))
1830 continue;
1831
1832 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1833 device, &async);
1834 }
1835
1836 async_synchronize_full_domain(&async);
1837 hisi_sas_release_tasks(hisi_hba);
1838
1839 return TMF_RESP_FUNC_COMPLETE;
1840 }
1841
1842 static int hisi_sas_query_task(struct sas_task *task)
1843 {
1844 int rc = TMF_RESP_FUNC_FAILED;
1845
1846 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1847 struct hisi_sas_slot *slot = task->lldd_task;
1848 u32 tag = slot->idx;
1849
1850 rc = sas_query_task(task, tag);
1851 switch (rc) {
1852 /* The task is still in Lun, release it then */
1853 case TMF_RESP_FUNC_SUCC:
1854 /* The task is not in Lun or failed, reset the phy */
1855 case TMF_RESP_FUNC_FAILED:
1856 case TMF_RESP_FUNC_COMPLETE:
1857 break;
1858 default:
1859 rc = TMF_RESP_FUNC_FAILED;
1860 break;
1861 }
1862 }
1863 return rc;
1864 }
1865
1866 static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
1867 void *data)
1868 {
1869 struct domain_device *device = task->dev;
1870 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1871 struct hisi_sas_internal_abort_data *timeout = data;
1872
1873 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1874 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
1875
1876 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1877 pr_err("Internal abort: timeout %016llx\n",
1878 SAS_ADDR(device->sas_addr));
1879 } else {
1880 struct hisi_sas_slot *slot = task->lldd_task;
1881
1882 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1883
1884 if (slot) {
1885 struct hisi_sas_cq *cq =
1886 &hisi_hba->cq[slot->dlvry_queue];
1887 /*
1888 * sync irq to avoid free'ing task
1889 * before using task in IO completion
1890 */
1891 synchronize_irq(cq->irq_no);
1892 slot->task = NULL;
1893 }
1894
1895 if (timeout->rst_ha_timeout) {
1896 pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n",
1897 SAS_ADDR(device->sas_addr));
1898 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
1899 } else {
1900 pr_err("Internal abort: timeout and not done %016llx.\n",
1901 SAS_ADDR(device->sas_addr));
1902 }
1903
1904 return true;
1905 }
1906
1907 return false;
1908 }
1909
1910 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1911 {
1912 hisi_sas_port_notify_formed(sas_phy);
1913 }
1914
1915 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
1916 u8 reg_index, u8 reg_count, u8 *write_data)
1917 {
1918 struct hisi_hba *hisi_hba = sha->lldd_ha;
1919
1920 if (!hisi_hba->hw->write_gpio)
1921 return -EOPNOTSUPP;
1922
1923 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
1924 reg_index, reg_count, write_data);
1925 }
1926
1927 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1928 {
1929 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1930 struct sas_phy *sphy = sas_phy->phy;
1931 unsigned long flags;
1932
1933 phy->phy_attached = 0;
1934 phy->phy_type = 0;
1935 phy->port = NULL;
1936
1937 spin_lock_irqsave(&phy->lock, flags);
1938 if (phy->enable)
1939 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
1940 else
1941 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
1942 spin_unlock_irqrestore(&phy->lock, flags);
1943 }
1944
1945 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
1946 gfp_t gfp_flags)
1947 {
1948 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1949 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1950 struct device *dev = hisi_hba->dev;
1951
1952 if (rdy) {
1953 /* Phy down but ready */
1954 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
1955 hisi_sas_port_notify_formed(sas_phy);
1956 } else {
1957 struct hisi_sas_port *port = phy->port;
1958
1959 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||
1960 phy->in_reset) {
1961 dev_info(dev, "ignore flutter phy%d down\n", phy_no);
1962 return;
1963 }
1964 /* Phy down and not ready */
1965 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
1966 sas_phy_disconnected(sas_phy);
1967
1968 if (port) {
1969 if (phy->phy_type & PORT_TYPE_SAS) {
1970 int port_id = port->id;
1971
1972 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1973 port_id))
1974 port->port_attached = 0;
1975 } else if (phy->phy_type & PORT_TYPE_SATA)
1976 port->port_attached = 0;
1977 }
1978 hisi_sas_phy_disconnected(phy);
1979 }
1980 }
1981 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1982
1983 void hisi_sas_phy_bcast(struct hisi_sas_phy *phy)
1984 {
1985 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1986 struct hisi_hba *hisi_hba = phy->hisi_hba;
1987
1988 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags))
1989 return;
1990
1991 sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC);
1992 }
1993 EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast);
1994
1995 void hisi_sas_sync_irqs(struct hisi_hba *hisi_hba)
1996 {
1997 int i;
1998
1999 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2000 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2001
2002 synchronize_irq(cq->irq_no);
2003 }
2004 }
2005 EXPORT_SYMBOL_GPL(hisi_sas_sync_irqs);
2006
2007 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2008 {
2009 struct hisi_hba *hisi_hba = shost_priv(shost);
2010
2011 if (reset_type != SCSI_ADAPTER_RESET)
2012 return -EOPNOTSUPP;
2013
2014 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2015
2016 return 0;
2017 }
2018 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2019
2020 struct scsi_transport_template *hisi_sas_stt;
2021 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2022
2023 static struct sas_domain_function_template hisi_sas_transport_ops = {
2024 .lldd_dev_found = hisi_sas_dev_found,
2025 .lldd_dev_gone = hisi_sas_dev_gone,
2026 .lldd_execute_task = hisi_sas_queue_command,
2027 .lldd_control_phy = hisi_sas_control_phy,
2028 .lldd_abort_task = hisi_sas_abort_task,
2029 .lldd_abort_task_set = hisi_sas_abort_task_set,
2030 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
2031 .lldd_lu_reset = hisi_sas_lu_reset,
2032 .lldd_query_task = hisi_sas_query_task,
2033 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
2034 .lldd_port_formed = hisi_sas_port_formed,
2035 .lldd_write_gpio = hisi_sas_write_gpio,
2036 .lldd_tmf_aborted = hisi_sas_tmf_aborted,
2037 .lldd_abort_timeout = hisi_sas_internal_abort_timeout,
2038 };
2039
2040 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2041 {
2042 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2043 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2044
2045 for (i = 0; i < hisi_hba->queue_count; i++) {
2046 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2047 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2048 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2049
2050 s = sizeof(struct hisi_sas_cmd_hdr);
2051 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2052 memset(&cmd_hdr[j], 0, s);
2053
2054 dq->wr_point = 0;
2055
2056 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2057 memset(hisi_hba->complete_hdr[i], 0, s);
2058 cq->rd_point = 0;
2059 }
2060
2061 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2062 memset(hisi_hba->initial_fis, 0, s);
2063
2064 s = max_command_entries * sizeof(struct hisi_sas_iost);
2065 memset(hisi_hba->iost, 0, s);
2066
2067 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2068 memset(hisi_hba->breakpoint, 0, s);
2069
2070 s = sizeof(struct hisi_sas_sata_breakpoint);
2071 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2072 memset(&sata_breakpoint[j], 0, s);
2073 }
2074 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2075
2076 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2077 {
2078 struct device *dev = hisi_hba->dev;
2079 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2080 int max_command_entries_ru, sz_slot_buf_ru;
2081 int blk_cnt, slots_per_blk;
2082
2083 sema_init(&hisi_hba->sem, 1);
2084 spin_lock_init(&hisi_hba->lock);
2085 for (i = 0; i < hisi_hba->n_phy; i++) {
2086 hisi_sas_phy_init(hisi_hba, i);
2087 hisi_hba->port[i].port_attached = 0;
2088 hisi_hba->port[i].id = -1;
2089 }
2090
2091 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2092 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2093 hisi_hba->devices[i].device_id = i;
2094 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2095 }
2096
2097 for (i = 0; i < hisi_hba->queue_count; i++) {
2098 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2099 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2100
2101 /* Completion queue structure */
2102 cq->id = i;
2103 cq->hisi_hba = hisi_hba;
2104
2105 /* Delivery queue structure */
2106 spin_lock_init(&dq->lock);
2107 INIT_LIST_HEAD(&dq->list);
2108 dq->id = i;
2109 dq->hisi_hba = hisi_hba;
2110
2111 /* Delivery queue */
2112 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2113 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2114 &hisi_hba->cmd_hdr_dma[i],
2115 GFP_KERNEL);
2116 if (!hisi_hba->cmd_hdr[i])
2117 goto err_out;
2118
2119 /* Completion queue */
2120 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2121 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2122 &hisi_hba->complete_hdr_dma[i],
2123 GFP_KERNEL);
2124 if (!hisi_hba->complete_hdr[i])
2125 goto err_out;
2126 }
2127
2128 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2129 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2130 GFP_KERNEL);
2131 if (!hisi_hba->itct)
2132 goto err_out;
2133
2134 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2135 sizeof(struct hisi_sas_slot),
2136 GFP_KERNEL);
2137 if (!hisi_hba->slot_info)
2138 goto err_out;
2139
2140 /* roundup to avoid overly large block size */
2141 max_command_entries_ru = roundup(max_command_entries, 64);
2142 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2143 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2144 else
2145 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2146 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2147 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2148 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2149 slots_per_blk = s / sz_slot_buf_ru;
2150
2151 for (i = 0; i < blk_cnt; i++) {
2152 int slot_index = i * slots_per_blk;
2153 dma_addr_t buf_dma;
2154 void *buf;
2155
2156 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2157 GFP_KERNEL);
2158 if (!buf)
2159 goto err_out;
2160
2161 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2162 struct hisi_sas_slot *slot;
2163
2164 slot = &hisi_hba->slot_info[slot_index];
2165 slot->buf = buf;
2166 slot->buf_dma = buf_dma;
2167 slot->idx = slot_index;
2168
2169 buf += sz_slot_buf_ru;
2170 buf_dma += sz_slot_buf_ru;
2171 }
2172 }
2173
2174 s = max_command_entries * sizeof(struct hisi_sas_iost);
2175 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2176 GFP_KERNEL);
2177 if (!hisi_hba->iost)
2178 goto err_out;
2179
2180 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2181 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2182 &hisi_hba->breakpoint_dma,
2183 GFP_KERNEL);
2184 if (!hisi_hba->breakpoint)
2185 goto err_out;
2186
2187 s = hisi_hba->slot_index_count = max_command_entries;
2188 hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);
2189 if (!hisi_hba->slot_index_tags)
2190 goto err_out;
2191
2192 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2193 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2194 &hisi_hba->initial_fis_dma,
2195 GFP_KERNEL);
2196 if (!hisi_hba->initial_fis)
2197 goto err_out;
2198
2199 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2200 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2201 &hisi_hba->sata_breakpoint_dma,
2202 GFP_KERNEL);
2203 if (!hisi_hba->sata_breakpoint)
2204 goto err_out;
2205
2206 hisi_hba->last_slot_index = 0;
2207
2208 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2209 if (!hisi_hba->wq) {
2210 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2211 goto err_out;
2212 }
2213
2214 return 0;
2215 err_out:
2216 return -ENOMEM;
2217 }
2218 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2219
2220 void hisi_sas_free(struct hisi_hba *hisi_hba)
2221 {
2222 int i;
2223
2224 for (i = 0; i < hisi_hba->n_phy; i++) {
2225 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2226
2227 del_timer_sync(&phy->timer);
2228 }
2229
2230 if (hisi_hba->wq)
2231 destroy_workqueue(hisi_hba->wq);
2232 }
2233 EXPORT_SYMBOL_GPL(hisi_sas_free);
2234
2235 void hisi_sas_rst_work_handler(struct work_struct *work)
2236 {
2237 struct hisi_hba *hisi_hba =
2238 container_of(work, struct hisi_hba, rst_work);
2239
2240 if (hisi_sas_controller_prereset(hisi_hba))
2241 return;
2242
2243 hisi_sas_controller_reset(hisi_hba);
2244 }
2245 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2246
2247 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2248 {
2249 struct hisi_sas_rst *rst =
2250 container_of(work, struct hisi_sas_rst, work);
2251
2252 if (hisi_sas_controller_prereset(rst->hisi_hba))
2253 goto rst_complete;
2254
2255 if (!hisi_sas_controller_reset(rst->hisi_hba))
2256 rst->done = true;
2257 rst_complete:
2258 complete(rst->completion);
2259 }
2260 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2261
2262 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2263 {
2264 struct device *dev = hisi_hba->dev;
2265 struct platform_device *pdev = hisi_hba->platform_dev;
2266 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2267 struct clk *refclk;
2268
2269 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2270 SAS_ADDR_SIZE)) {
2271 dev_err(dev, "could not get property sas-addr\n");
2272 return -ENOENT;
2273 }
2274
2275 if (np) {
2276 /*
2277 * These properties are only required for platform device-based
2278 * controller with DT firmware.
2279 */
2280 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2281 "hisilicon,sas-syscon");
2282 if (IS_ERR(hisi_hba->ctrl)) {
2283 dev_err(dev, "could not get syscon\n");
2284 return -ENOENT;
2285 }
2286
2287 if (device_property_read_u32(dev, "ctrl-reset-reg",
2288 &hisi_hba->ctrl_reset_reg)) {
2289 dev_err(dev, "could not get property ctrl-reset-reg\n");
2290 return -ENOENT;
2291 }
2292
2293 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2294 &hisi_hba->ctrl_reset_sts_reg)) {
2295 dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2296 return -ENOENT;
2297 }
2298
2299 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2300 &hisi_hba->ctrl_clock_ena_reg)) {
2301 dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2302 return -ENOENT;
2303 }
2304 }
2305
2306 refclk = devm_clk_get(dev, NULL);
2307 if (IS_ERR(refclk))
2308 dev_dbg(dev, "no ref clk property\n");
2309 else
2310 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2311
2312 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2313 dev_err(dev, "could not get property phy-count\n");
2314 return -ENOENT;
2315 }
2316
2317 if (device_property_read_u32(dev, "queue-count",
2318 &hisi_hba->queue_count)) {
2319 dev_err(dev, "could not get property queue-count\n");
2320 return -ENOENT;
2321 }
2322
2323 return 0;
2324 }
2325 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2326
2327 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2328 const struct hisi_sas_hw *hw)
2329 {
2330 struct resource *res;
2331 struct Scsi_Host *shost;
2332 struct hisi_hba *hisi_hba;
2333 struct device *dev = &pdev->dev;
2334 int error;
2335
2336 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2337 if (!shost) {
2338 dev_err(dev, "scsi host alloc failed\n");
2339 return NULL;
2340 }
2341 hisi_hba = shost_priv(shost);
2342
2343 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2344 hisi_hba->hw = hw;
2345 hisi_hba->dev = dev;
2346 hisi_hba->platform_dev = pdev;
2347 hisi_hba->shost = shost;
2348 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2349
2350 timer_setup(&hisi_hba->timer, NULL, 0);
2351
2352 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2353 goto err_out;
2354
2355 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2356 if (error) {
2357 dev_err(dev, "No usable DMA addressing method\n");
2358 goto err_out;
2359 }
2360
2361 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2362 if (IS_ERR(hisi_hba->regs))
2363 goto err_out;
2364
2365 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2366 if (res) {
2367 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2368 if (IS_ERR(hisi_hba->sgpio_regs))
2369 goto err_out;
2370 }
2371
2372 if (hisi_sas_alloc(hisi_hba)) {
2373 hisi_sas_free(hisi_hba);
2374 goto err_out;
2375 }
2376
2377 return shost;
2378 err_out:
2379 scsi_host_put(shost);
2380 dev_err(dev, "shost alloc failed\n");
2381 return NULL;
2382 }
2383
2384 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2385 {
2386 if (hisi_hba->hw->interrupt_preinit)
2387 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2388 return 0;
2389 }
2390
2391 int hisi_sas_probe(struct platform_device *pdev,
2392 const struct hisi_sas_hw *hw)
2393 {
2394 struct Scsi_Host *shost;
2395 struct hisi_hba *hisi_hba;
2396 struct device *dev = &pdev->dev;
2397 struct asd_sas_phy **arr_phy;
2398 struct asd_sas_port **arr_port;
2399 struct sas_ha_struct *sha;
2400 int rc, phy_nr, port_nr, i;
2401
2402 shost = hisi_sas_shost_alloc(pdev, hw);
2403 if (!shost)
2404 return -ENOMEM;
2405
2406 sha = SHOST_TO_SAS_HA(shost);
2407 hisi_hba = shost_priv(shost);
2408 platform_set_drvdata(pdev, sha);
2409
2410 phy_nr = port_nr = hisi_hba->n_phy;
2411
2412 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2413 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2414 if (!arr_phy || !arr_port) {
2415 rc = -ENOMEM;
2416 goto err_out_ha;
2417 }
2418
2419 sha->sas_phy = arr_phy;
2420 sha->sas_port = arr_port;
2421 sha->lldd_ha = hisi_hba;
2422
2423 shost->transportt = hisi_sas_stt;
2424 shost->max_id = HISI_SAS_MAX_DEVICES;
2425 shost->max_lun = ~0;
2426 shost->max_channel = 1;
2427 shost->max_cmd_len = 16;
2428 if (hisi_hba->hw->slot_index_alloc) {
2429 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2430 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2431 } else {
2432 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2433 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2434 }
2435
2436 sha->sas_ha_name = DRV_NAME;
2437 sha->dev = hisi_hba->dev;
2438 sha->lldd_module = THIS_MODULE;
2439 sha->sas_addr = &hisi_hba->sas_addr[0];
2440 sha->num_phys = hisi_hba->n_phy;
2441 sha->core.shost = hisi_hba->shost;
2442
2443 for (i = 0; i < hisi_hba->n_phy; i++) {
2444 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2445 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2446 }
2447
2448 rc = hisi_sas_interrupt_preinit(hisi_hba);
2449 if (rc)
2450 goto err_out_ha;
2451
2452 rc = scsi_add_host(shost, &pdev->dev);
2453 if (rc)
2454 goto err_out_ha;
2455
2456 rc = sas_register_ha(sha);
2457 if (rc)
2458 goto err_out_register_ha;
2459
2460 rc = hisi_hba->hw->hw_init(hisi_hba);
2461 if (rc)
2462 goto err_out_hw_init;
2463
2464 scsi_scan_host(shost);
2465
2466 return 0;
2467
2468 err_out_hw_init:
2469 sas_unregister_ha(sha);
2470 err_out_register_ha:
2471 scsi_remove_host(shost);
2472 err_out_ha:
2473 hisi_sas_free(hisi_hba);
2474 scsi_host_put(shost);
2475 return rc;
2476 }
2477 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2478
2479 int hisi_sas_remove(struct platform_device *pdev)
2480 {
2481 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2482 struct hisi_hba *hisi_hba = sha->lldd_ha;
2483 struct Scsi_Host *shost = sha->core.shost;
2484
2485 del_timer_sync(&hisi_hba->timer);
2486
2487 sas_unregister_ha(sha);
2488 sas_remove_host(sha->core.shost);
2489
2490 hisi_sas_free(hisi_hba);
2491 scsi_host_put(shost);
2492 return 0;
2493 }
2494 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2495
2496 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2497 #define DEBUGFS_ENABLE_DEFAULT "enabled"
2498 bool hisi_sas_debugfs_enable = true;
2499 u32 hisi_sas_debugfs_dump_count = 50;
2500 #else
2501 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2502 bool hisi_sas_debugfs_enable;
2503 u32 hisi_sas_debugfs_dump_count = 1;
2504 #endif
2505
2506 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2507 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2508 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2509 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2510
2511 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2512 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2513 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2514
2515 struct dentry *hisi_sas_debugfs_dir;
2516 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2517
2518 static __init int hisi_sas_init(void)
2519 {
2520 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2521 if (!hisi_sas_stt)
2522 return -ENOMEM;
2523
2524 if (hisi_sas_debugfs_enable) {
2525 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2526 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2527 pr_info("hisi_sas: Limiting debugfs dump count\n");
2528 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2529 }
2530 }
2531
2532 return 0;
2533 }
2534
2535 static __exit void hisi_sas_exit(void)
2536 {
2537 sas_release_transport(hisi_sas_stt);
2538
2539 debugfs_remove(hisi_sas_debugfs_dir);
2540 }
2541
2542 module_init(hisi_sas_init);
2543 module_exit(hisi_sas_exit);
2544
2545 MODULE_LICENSE("GPL");
2546 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2547 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2548 MODULE_ALIAS("platform:" DRV_NAME);
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