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
hisi_sas_get_ata_protocol(struct host_to_dev_fis * fis,int direction)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
hisi_sas_sata_done(struct sas_task * task,struct hisi_sas_slot * slot)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 */
hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)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
dev_to_hisi_hba(struct domain_device * device)135 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
136 {
137 return device->port->ha->lldd_ha;
138 }
139
to_hisi_sas_port(struct asd_sas_port * sas_port)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
hisi_sas_stop_phys(struct hisi_hba * hisi_hba)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
hisi_sas_slot_index_clear(struct hisi_hba * hisi_hba,int slot_idx)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
hisi_sas_slot_index_free(struct hisi_hba * hisi_hba,int slot_idx)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
hisi_sas_slot_index_set(struct hisi_hba * hisi_hba,int slot_idx)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
hisi_sas_slot_index_alloc(struct hisi_hba * hisi_hba,struct request * rq)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
hisi_sas_slot_task_free(struct hisi_hba * hisi_hba,struct sas_task * task,struct hisi_sas_slot * slot,bool need_lock)207 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
208 struct hisi_sas_slot *slot, bool need_lock)
209 {
210 int device_id = slot->device_id;
211 struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
212
213 if (task) {
214 struct device *dev = hisi_hba->dev;
215
216 if (!task->lldd_task)
217 return;
218
219 task->lldd_task = NULL;
220
221 if (!sas_protocol_ata(task->task_proto)) {
222 if (slot->n_elem) {
223 if (task->task_proto & SAS_PROTOCOL_SSP)
224 dma_unmap_sg(dev, task->scatter,
225 task->num_scatter,
226 task->data_dir);
227 else
228 dma_unmap_sg(dev, &task->smp_task.smp_req,
229 1, DMA_TO_DEVICE);
230 }
231 if (slot->n_elem_dif) {
232 struct sas_ssp_task *ssp_task = &task->ssp_task;
233 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
234
235 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
236 scsi_prot_sg_count(scsi_cmnd),
237 task->data_dir);
238 }
239 }
240 }
241
242 if (need_lock) {
243 spin_lock(&sas_dev->lock);
244 list_del_init(&slot->entry);
245 spin_unlock(&sas_dev->lock);
246 } else {
247 list_del_init(&slot->entry);
248 }
249
250 memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
251
252 hisi_sas_slot_index_free(hisi_hba, slot->idx);
253 }
254 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
255
hisi_sas_task_prep_smp(struct hisi_hba * hisi_hba,struct hisi_sas_slot * slot)256 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
257 struct hisi_sas_slot *slot)
258 {
259 hisi_hba->hw->prep_smp(hisi_hba, slot);
260 }
261
hisi_sas_task_prep_ssp(struct hisi_hba * hisi_hba,struct hisi_sas_slot * slot)262 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
263 struct hisi_sas_slot *slot)
264 {
265 hisi_hba->hw->prep_ssp(hisi_hba, slot);
266 }
267
hisi_sas_task_prep_ata(struct hisi_hba * hisi_hba,struct hisi_sas_slot * slot)268 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
269 struct hisi_sas_slot *slot)
270 {
271 hisi_hba->hw->prep_stp(hisi_hba, slot);
272 }
273
hisi_sas_task_prep_abort(struct hisi_hba * hisi_hba,struct hisi_sas_slot * slot)274 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
275 struct hisi_sas_slot *slot)
276 {
277 hisi_hba->hw->prep_abort(hisi_hba, slot);
278 }
279
hisi_sas_dma_unmap(struct hisi_hba * hisi_hba,struct sas_task * task,int n_elem)280 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
281 struct sas_task *task, int n_elem)
282 {
283 struct device *dev = hisi_hba->dev;
284
285 if (!sas_protocol_ata(task->task_proto) && n_elem) {
286 if (task->num_scatter) {
287 dma_unmap_sg(dev, task->scatter, task->num_scatter,
288 task->data_dir);
289 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
290 dma_unmap_sg(dev, &task->smp_task.smp_req,
291 1, DMA_TO_DEVICE);
292 }
293 }
294 }
295
hisi_sas_dma_map(struct hisi_hba * hisi_hba,struct sas_task * task,int * n_elem)296 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
297 struct sas_task *task, int *n_elem)
298 {
299 struct device *dev = hisi_hba->dev;
300 int rc;
301
302 if (sas_protocol_ata(task->task_proto)) {
303 *n_elem = task->num_scatter;
304 } else {
305 unsigned int req_len;
306
307 if (task->num_scatter) {
308 *n_elem = dma_map_sg(dev, task->scatter,
309 task->num_scatter, task->data_dir);
310 if (!*n_elem) {
311 rc = -ENOMEM;
312 goto prep_out;
313 }
314 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
315 *n_elem = dma_map_sg(dev, &task->smp_task.smp_req,
316 1, DMA_TO_DEVICE);
317 if (!*n_elem) {
318 rc = -ENOMEM;
319 goto prep_out;
320 }
321 req_len = sg_dma_len(&task->smp_task.smp_req);
322 if (req_len & 0x3) {
323 rc = -EINVAL;
324 goto err_out_dma_unmap;
325 }
326 }
327 }
328
329 if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
330 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
331 *n_elem);
332 rc = -EINVAL;
333 goto err_out_dma_unmap;
334 }
335 return 0;
336
337 err_out_dma_unmap:
338 /* It would be better to call dma_unmap_sg() here, but it's messy */
339 hisi_sas_dma_unmap(hisi_hba, task, *n_elem);
340 prep_out:
341 return rc;
342 }
343
hisi_sas_dif_dma_unmap(struct hisi_hba * hisi_hba,struct sas_task * task,int n_elem_dif)344 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
345 struct sas_task *task, int n_elem_dif)
346 {
347 struct device *dev = hisi_hba->dev;
348
349 if (n_elem_dif) {
350 struct sas_ssp_task *ssp_task = &task->ssp_task;
351 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
352
353 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
354 scsi_prot_sg_count(scsi_cmnd),
355 task->data_dir);
356 }
357 }
358
hisi_sas_dif_dma_map(struct hisi_hba * hisi_hba,int * n_elem_dif,struct sas_task * task)359 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
360 int *n_elem_dif, struct sas_task *task)
361 {
362 struct device *dev = hisi_hba->dev;
363 struct sas_ssp_task *ssp_task;
364 struct scsi_cmnd *scsi_cmnd;
365 int rc;
366
367 if (task->num_scatter) {
368 ssp_task = &task->ssp_task;
369 scsi_cmnd = ssp_task->cmd;
370
371 if (scsi_prot_sg_count(scsi_cmnd)) {
372 *n_elem_dif = dma_map_sg(dev,
373 scsi_prot_sglist(scsi_cmnd),
374 scsi_prot_sg_count(scsi_cmnd),
375 task->data_dir);
376
377 if (!*n_elem_dif)
378 return -ENOMEM;
379
380 if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
381 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
382 *n_elem_dif);
383 rc = -EINVAL;
384 goto err_out_dif_dma_unmap;
385 }
386 }
387 }
388
389 return 0;
390
391 err_out_dif_dma_unmap:
392 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
393 scsi_prot_sg_count(scsi_cmnd), task->data_dir);
394 return rc;
395 }
396
397 static
hisi_sas_task_deliver(struct hisi_hba * hisi_hba,struct hisi_sas_slot * slot,struct hisi_sas_dq * dq,struct hisi_sas_device * sas_dev)398 void hisi_sas_task_deliver(struct hisi_hba *hisi_hba,
399 struct hisi_sas_slot *slot,
400 struct hisi_sas_dq *dq,
401 struct hisi_sas_device *sas_dev)
402 {
403 struct hisi_sas_cmd_hdr *cmd_hdr_base;
404 int dlvry_queue_slot, dlvry_queue;
405 struct sas_task *task = slot->task;
406 int wr_q_index;
407
408 spin_lock(&dq->lock);
409 wr_q_index = dq->wr_point;
410 dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
411 list_add_tail(&slot->delivery, &dq->list);
412 spin_unlock(&dq->lock);
413 spin_lock(&sas_dev->lock);
414 list_add_tail(&slot->entry, &sas_dev->list);
415 spin_unlock(&sas_dev->lock);
416
417 dlvry_queue = dq->id;
418 dlvry_queue_slot = wr_q_index;
419
420 slot->device_id = sas_dev->device_id;
421 slot->dlvry_queue = dlvry_queue;
422 slot->dlvry_queue_slot = dlvry_queue_slot;
423 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
424 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
425
426 task->lldd_task = slot;
427
428 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
429 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
430 memset(hisi_sas_status_buf_addr_mem(slot), 0,
431 sizeof(struct hisi_sas_err_record));
432
433 switch (task->task_proto) {
434 case SAS_PROTOCOL_SMP:
435 hisi_sas_task_prep_smp(hisi_hba, slot);
436 break;
437 case SAS_PROTOCOL_SSP:
438 hisi_sas_task_prep_ssp(hisi_hba, slot);
439 break;
440 case SAS_PROTOCOL_SATA:
441 case SAS_PROTOCOL_STP:
442 case SAS_PROTOCOL_STP_ALL:
443 hisi_sas_task_prep_ata(hisi_hba, slot);
444 break;
445 case SAS_PROTOCOL_INTERNAL_ABORT:
446 hisi_sas_task_prep_abort(hisi_hba, slot);
447 break;
448 default:
449 return;
450 }
451
452 /* Make slot memories observable before marking as ready */
453 smp_wmb();
454 WRITE_ONCE(slot->ready, 1);
455
456 spin_lock(&dq->lock);
457 hisi_hba->hw->start_delivery(dq);
458 spin_unlock(&dq->lock);
459 }
460
hisi_sas_queue_command(struct sas_task * task,gfp_t gfp_flags)461 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
462 {
463 int n_elem = 0, n_elem_dif = 0;
464 struct domain_device *device = task->dev;
465 struct asd_sas_port *sas_port = device->port;
466 struct hisi_sas_device *sas_dev = device->lldd_dev;
467 bool internal_abort = sas_is_internal_abort(task);
468 struct hisi_sas_dq *dq = NULL;
469 struct hisi_sas_port *port;
470 struct hisi_hba *hisi_hba;
471 struct hisi_sas_slot *slot;
472 struct request *rq = NULL;
473 struct device *dev;
474 int rc;
475
476 if (!sas_port) {
477 struct task_status_struct *ts = &task->task_status;
478
479 ts->resp = SAS_TASK_UNDELIVERED;
480 ts->stat = SAS_PHY_DOWN;
481 /*
482 * libsas will use dev->port, should
483 * not call task_done for sata
484 */
485 if (device->dev_type != SAS_SATA_DEV && !internal_abort)
486 task->task_done(task);
487 return -ECOMM;
488 }
489
490 hisi_hba = dev_to_hisi_hba(device);
491 dev = hisi_hba->dev;
492
493 switch (task->task_proto) {
494 case SAS_PROTOCOL_SSP:
495 case SAS_PROTOCOL_SMP:
496 case SAS_PROTOCOL_SATA:
497 case SAS_PROTOCOL_STP:
498 case SAS_PROTOCOL_STP_ALL:
499 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
500 if (!gfpflags_allow_blocking(gfp_flags))
501 return -EINVAL;
502
503 down(&hisi_hba->sem);
504 up(&hisi_hba->sem);
505 }
506
507 if (DEV_IS_GONE(sas_dev)) {
508 if (sas_dev)
509 dev_info(dev, "task prep: device %d not ready\n",
510 sas_dev->device_id);
511 else
512 dev_info(dev, "task prep: device %016llx not ready\n",
513 SAS_ADDR(device->sas_addr));
514
515 return -ECOMM;
516 }
517
518 port = to_hisi_sas_port(sas_port);
519 if (!port->port_attached) {
520 dev_info(dev, "task prep: %s port%d not attach device\n",
521 dev_is_sata(device) ? "SATA/STP" : "SAS",
522 device->port->id);
523
524 return -ECOMM;
525 }
526
527 rq = sas_task_find_rq(task);
528 if (rq) {
529 unsigned int dq_index;
530 u32 blk_tag;
531
532 blk_tag = blk_mq_unique_tag(rq);
533 dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
534 dq = &hisi_hba->dq[dq_index];
535 } else {
536 int queue;
537
538 if (hisi_hba->iopoll_q_cnt) {
539 /*
540 * Use interrupt queue (queue 0) to deliver and complete
541 * internal IOs of libsas or libata when there is at least
542 * one iopoll queue
543 */
544 queue = 0;
545 } else {
546 struct Scsi_Host *shost = hisi_hba->shost;
547 struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
548
549 queue = qmap->mq_map[raw_smp_processor_id()];
550 }
551 dq = &hisi_hba->dq[queue];
552 }
553 break;
554 case SAS_PROTOCOL_INTERNAL_ABORT:
555 if (!hisi_hba->hw->prep_abort)
556 return TMF_RESP_FUNC_FAILED;
557
558 if (test_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags))
559 return -EIO;
560
561 hisi_hba = dev_to_hisi_hba(device);
562
563 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
564 return -EINVAL;
565
566 port = to_hisi_sas_port(sas_port);
567 dq = &hisi_hba->dq[task->abort_task.qid];
568 break;
569 default:
570 dev_err(hisi_hba->dev, "task prep: unknown/unsupported proto (0x%x)\n",
571 task->task_proto);
572 return -EINVAL;
573 }
574
575 rc = hisi_sas_dma_map(hisi_hba, task, &n_elem);
576 if (rc < 0)
577 goto prep_out;
578
579 if (!sas_protocol_ata(task->task_proto)) {
580 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
581 if (rc < 0)
582 goto err_out_dma_unmap;
583 }
584
585 if (!internal_abort && hisi_hba->hw->slot_index_alloc)
586 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
587 else
588 rc = hisi_sas_slot_index_alloc(hisi_hba, rq);
589
590 if (rc < 0)
591 goto err_out_dif_dma_unmap;
592
593 slot = &hisi_hba->slot_info[rc];
594 slot->n_elem = n_elem;
595 slot->n_elem_dif = n_elem_dif;
596 slot->task = task;
597 slot->port = port;
598
599 slot->tmf = task->tmf;
600 slot->is_internal = !!task->tmf || internal_abort;
601
602 /* protect task_prep and start_delivery sequence */
603 hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev);
604
605 return 0;
606
607 err_out_dif_dma_unmap:
608 if (!sas_protocol_ata(task->task_proto))
609 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
610 err_out_dma_unmap:
611 hisi_sas_dma_unmap(hisi_hba, task, n_elem);
612 prep_out:
613 dev_err(dev, "task exec: failed[%d]!\n", rc);
614 return rc;
615 }
616
hisi_sas_bytes_dmaed(struct hisi_hba * hisi_hba,int phy_no,gfp_t gfp_flags)617 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no,
618 gfp_t gfp_flags)
619 {
620 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
621 struct asd_sas_phy *sas_phy = &phy->sas_phy;
622
623 if (!phy->phy_attached)
624 return;
625
626 sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
627
628 if (sas_phy->phy) {
629 struct sas_phy *sphy = sas_phy->phy;
630
631 sphy->negotiated_linkrate = sas_phy->linkrate;
632 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
633 sphy->maximum_linkrate_hw =
634 hisi_hba->hw->phy_get_max_linkrate();
635 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
636 sphy->minimum_linkrate = phy->minimum_linkrate;
637
638 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
639 sphy->maximum_linkrate = phy->maximum_linkrate;
640 }
641
642 if (phy->phy_type & PORT_TYPE_SAS) {
643 struct sas_identify_frame *id;
644
645 id = (struct sas_identify_frame *)phy->frame_rcvd;
646 id->dev_type = phy->identify.device_type;
647 id->initiator_bits = SAS_PROTOCOL_ALL;
648 id->target_bits = phy->identify.target_port_protocols;
649 } else if (phy->phy_type & PORT_TYPE_SATA) {
650 /* Nothing */
651 }
652
653 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
654 sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
655 }
656
hisi_sas_alloc_dev(struct domain_device * device)657 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
658 {
659 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
660 struct hisi_sas_device *sas_dev = NULL;
661 int last = hisi_hba->last_dev_id;
662 int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
663 int i;
664
665 spin_lock(&hisi_hba->lock);
666 for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
667 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
668 int queue = i % hisi_hba->queue_count;
669 struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
670
671 hisi_hba->devices[i].device_id = i;
672 sas_dev = &hisi_hba->devices[i];
673 sas_dev->dev_status = HISI_SAS_DEV_INIT;
674 sas_dev->dev_type = device->dev_type;
675 sas_dev->hisi_hba = hisi_hba;
676 sas_dev->sas_device = device;
677 sas_dev->dq = dq;
678 spin_lock_init(&sas_dev->lock);
679 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
680 break;
681 }
682 i++;
683 }
684 hisi_hba->last_dev_id = i;
685 spin_unlock(&hisi_hba->lock);
686
687 return sas_dev;
688 }
689
hisi_sas_sync_poll_cq(struct hisi_sas_cq * cq)690 static void hisi_sas_sync_poll_cq(struct hisi_sas_cq *cq)
691 {
692 /* make sure CQ entries being processed are processed to completion */
693 spin_lock(&cq->poll_lock);
694 spin_unlock(&cq->poll_lock);
695 }
696
hisi_sas_queue_is_poll(struct hisi_sas_cq * cq)697 static bool hisi_sas_queue_is_poll(struct hisi_sas_cq *cq)
698 {
699 struct hisi_hba *hisi_hba = cq->hisi_hba;
700
701 if (cq->id < hisi_hba->queue_count - hisi_hba->iopoll_q_cnt)
702 return false;
703 return true;
704 }
705
hisi_sas_sync_cq(struct hisi_sas_cq * cq)706 static void hisi_sas_sync_cq(struct hisi_sas_cq *cq)
707 {
708 if (hisi_sas_queue_is_poll(cq))
709 hisi_sas_sync_poll_cq(cq);
710 else
711 synchronize_irq(cq->irq_no);
712 }
713
hisi_sas_sync_poll_cqs(struct hisi_hba * hisi_hba)714 void hisi_sas_sync_poll_cqs(struct hisi_hba *hisi_hba)
715 {
716 int i;
717
718 for (i = 0; i < hisi_hba->queue_count; i++) {
719 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
720
721 if (hisi_sas_queue_is_poll(cq))
722 hisi_sas_sync_poll_cq(cq);
723 }
724 }
725 EXPORT_SYMBOL_GPL(hisi_sas_sync_poll_cqs);
726
hisi_sas_sync_cqs(struct hisi_hba * hisi_hba)727 void hisi_sas_sync_cqs(struct hisi_hba *hisi_hba)
728 {
729 int i;
730
731 for (i = 0; i < hisi_hba->queue_count; i++) {
732 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
733
734 hisi_sas_sync_cq(cq);
735 }
736 }
737 EXPORT_SYMBOL_GPL(hisi_sas_sync_cqs);
738
hisi_sas_tmf_aborted(struct sas_task * task)739 static void hisi_sas_tmf_aborted(struct sas_task *task)
740 {
741 struct hisi_sas_slot *slot = task->lldd_task;
742 struct domain_device *device = task->dev;
743 struct hisi_sas_device *sas_dev = device->lldd_dev;
744 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
745
746 if (slot) {
747 struct hisi_sas_cq *cq =
748 &hisi_hba->cq[slot->dlvry_queue];
749 /*
750 * sync irq or poll queue to avoid free'ing task
751 * before using task in IO completion
752 */
753 hisi_sas_sync_cq(cq);
754 slot->task = NULL;
755 }
756 }
757
758 #define HISI_SAS_DISK_RECOVER_CNT 3
hisi_sas_init_device(struct domain_device * device)759 static int hisi_sas_init_device(struct domain_device *device)
760 {
761 int rc = TMF_RESP_FUNC_COMPLETE;
762 struct scsi_lun lun;
763 int retry = HISI_SAS_DISK_RECOVER_CNT;
764 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
765
766 switch (device->dev_type) {
767 case SAS_END_DEVICE:
768 int_to_scsilun(0, &lun);
769
770 while (retry-- > 0) {
771 rc = sas_abort_task_set(device, lun.scsi_lun);
772 if (rc == TMF_RESP_FUNC_COMPLETE) {
773 hisi_sas_release_task(hisi_hba, device);
774 break;
775 }
776 }
777 break;
778 case SAS_SATA_DEV:
779 case SAS_SATA_PM:
780 case SAS_SATA_PM_PORT:
781 case SAS_SATA_PENDING:
782 /*
783 * If an expander is swapped when a SATA disk is attached then
784 * we should issue a hard reset to clear previous affiliation
785 * of STP target port, see SPL (chapter 6.19.4).
786 *
787 * However we don't need to issue a hard reset here for these
788 * reasons:
789 * a. When probing the device, libsas/libata already issues a
790 * hard reset in sas_probe_sata() -> ata_port_probe().
791 * Note that in hisi_sas_debug_I_T_nexus_reset() we take care
792 * to issue a hard reset by checking the dev status (== INIT).
793 * b. When resetting the controller, this is simply unnecessary.
794 */
795 while (retry-- > 0) {
796 rc = hisi_sas_softreset_ata_disk(device);
797 if (!rc)
798 break;
799 }
800 break;
801 default:
802 break;
803 }
804
805 return rc;
806 }
807
hisi_sas_slave_alloc(struct scsi_device * sdev)808 int hisi_sas_slave_alloc(struct scsi_device *sdev)
809 {
810 struct domain_device *ddev = sdev_to_domain_dev(sdev);
811 struct hisi_sas_device *sas_dev = ddev->lldd_dev;
812 int rc;
813
814 rc = sas_slave_alloc(sdev);
815 if (rc)
816 return rc;
817
818 rc = hisi_sas_init_device(ddev);
819 if (rc)
820 return rc;
821 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
822 return 0;
823 }
824 EXPORT_SYMBOL_GPL(hisi_sas_slave_alloc);
825
hisi_sas_dev_found(struct domain_device * device)826 static int hisi_sas_dev_found(struct domain_device *device)
827 {
828 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
829 struct domain_device *parent_dev = device->parent;
830 struct hisi_sas_device *sas_dev;
831 struct device *dev = hisi_hba->dev;
832 int rc;
833
834 if (hisi_hba->hw->alloc_dev)
835 sas_dev = hisi_hba->hw->alloc_dev(device);
836 else
837 sas_dev = hisi_sas_alloc_dev(device);
838 if (!sas_dev) {
839 dev_err(dev, "fail alloc dev: max support %d devices\n",
840 HISI_SAS_MAX_DEVICES);
841 return -EINVAL;
842 }
843
844 device->lldd_dev = sas_dev;
845 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
846
847 if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
848 int phy_no;
849
850 phy_no = sas_find_attached_phy_id(&parent_dev->ex_dev, device);
851 if (phy_no < 0) {
852 dev_info(dev, "dev found: no attached "
853 "dev:%016llx at ex:%016llx\n",
854 SAS_ADDR(device->sas_addr),
855 SAS_ADDR(parent_dev->sas_addr));
856 rc = phy_no;
857 goto err_out;
858 }
859 }
860
861 dev_info(dev, "dev[%d:%x] found\n",
862 sas_dev->device_id, sas_dev->dev_type);
863
864 return 0;
865
866 err_out:
867 hisi_sas_dev_gone(device);
868 return rc;
869 }
870
hisi_sas_slave_configure(struct scsi_device * sdev)871 int hisi_sas_slave_configure(struct scsi_device *sdev)
872 {
873 struct domain_device *dev = sdev_to_domain_dev(sdev);
874 int ret = sas_slave_configure(sdev);
875
876 if (ret)
877 return ret;
878 if (!dev_is_sata(dev))
879 sas_change_queue_depth(sdev, 64);
880
881 return 0;
882 }
883 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
884
hisi_sas_scan_start(struct Scsi_Host * shost)885 void hisi_sas_scan_start(struct Scsi_Host *shost)
886 {
887 struct hisi_hba *hisi_hba = shost_priv(shost);
888
889 hisi_hba->hw->phys_init(hisi_hba);
890 }
891 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
892
hisi_sas_scan_finished(struct Scsi_Host * shost,unsigned long time)893 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
894 {
895 struct hisi_hba *hisi_hba = shost_priv(shost);
896 struct sas_ha_struct *sha = &hisi_hba->sha;
897
898 /* Wait for PHY up interrupt to occur */
899 if (time < HZ)
900 return 0;
901
902 sas_drain_work(sha);
903 return 1;
904 }
905 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
906
hisi_sas_phyup_work_common(struct work_struct * work,enum hisi_sas_phy_event event)907 static void hisi_sas_phyup_work_common(struct work_struct *work,
908 enum hisi_sas_phy_event event)
909 {
910 struct hisi_sas_phy *phy =
911 container_of(work, typeof(*phy), works[event]);
912 struct hisi_hba *hisi_hba = phy->hisi_hba;
913 struct asd_sas_phy *sas_phy = &phy->sas_phy;
914 int phy_no = sas_phy->id;
915
916 phy->wait_phyup_cnt = 0;
917 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
918 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
919 hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
920 }
921
hisi_sas_phyup_work(struct work_struct * work)922 static void hisi_sas_phyup_work(struct work_struct *work)
923 {
924 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);
925 }
926
hisi_sas_linkreset_work(struct work_struct * work)927 static void hisi_sas_linkreset_work(struct work_struct *work)
928 {
929 struct hisi_sas_phy *phy =
930 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
931 struct asd_sas_phy *sas_phy = &phy->sas_phy;
932
933 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
934 }
935
hisi_sas_phyup_pm_work(struct work_struct * work)936 static void hisi_sas_phyup_pm_work(struct work_struct *work)
937 {
938 struct hisi_sas_phy *phy =
939 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);
940 struct hisi_hba *hisi_hba = phy->hisi_hba;
941 struct device *dev = hisi_hba->dev;
942
943 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);
944 pm_runtime_put_sync(dev);
945 }
946
947 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
948 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
949 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
950 [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,
951 };
952
hisi_sas_notify_phy_event(struct hisi_sas_phy * phy,enum hisi_sas_phy_event event)953 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
954 enum hisi_sas_phy_event event)
955 {
956 struct hisi_hba *hisi_hba = phy->hisi_hba;
957
958 if (WARN_ON(event >= HISI_PHYES_NUM))
959 return false;
960
961 return queue_work(hisi_hba->wq, &phy->works[event]);
962 }
963 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
964
hisi_sas_wait_phyup_timedout(struct timer_list * t)965 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
966 {
967 struct hisi_sas_phy *phy = from_timer(phy, t, timer);
968 struct hisi_hba *hisi_hba = phy->hisi_hba;
969 struct device *dev = hisi_hba->dev;
970 int phy_no = phy->sas_phy.id;
971
972 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
973 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
974 }
975
976 #define HISI_SAS_WAIT_PHYUP_RETRIES 10
977
hisi_sas_phy_oob_ready(struct hisi_hba * hisi_hba,int phy_no)978 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
979 {
980 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
981 struct device *dev = hisi_hba->dev;
982 unsigned long flags;
983
984 dev_dbg(dev, "phy%d OOB ready\n", phy_no);
985 spin_lock_irqsave(&phy->lock, flags);
986 if (phy->phy_attached) {
987 spin_unlock_irqrestore(&phy->lock, flags);
988 return;
989 }
990
991 if (!timer_pending(&phy->timer)) {
992 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
993 phy->wait_phyup_cnt++;
994 phy->timer.expires = jiffies +
995 HISI_SAS_WAIT_PHYUP_TIMEOUT;
996 add_timer(&phy->timer);
997 spin_unlock_irqrestore(&phy->lock, flags);
998 return;
999 }
1000
1001 dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
1002 phy_no, phy->wait_phyup_cnt);
1003 phy->wait_phyup_cnt = 0;
1004 }
1005 spin_unlock_irqrestore(&phy->lock, flags);
1006 }
1007
1008 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
1009
hisi_sas_phy_init(struct hisi_hba * hisi_hba,int phy_no)1010 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
1011 {
1012 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1013 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1014 int i;
1015
1016 phy->hisi_hba = hisi_hba;
1017 phy->port = NULL;
1018 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
1019 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
1020 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
1021 sas_phy->iproto = SAS_PROTOCOL_ALL;
1022 sas_phy->tproto = 0;
1023 sas_phy->role = PHY_ROLE_INITIATOR;
1024 sas_phy->oob_mode = OOB_NOT_CONNECTED;
1025 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
1026 sas_phy->id = phy_no;
1027 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
1028 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
1029 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
1030 sas_phy->lldd_phy = phy;
1031
1032 for (i = 0; i < HISI_PHYES_NUM; i++)
1033 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
1034
1035 spin_lock_init(&phy->lock);
1036
1037 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
1038 }
1039
1040 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
hisi_sas_phy_enable(struct hisi_hba * hisi_hba,int phy_no,int enable)1041 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
1042 {
1043 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1044 struct asd_sas_phy *aphy = &phy->sas_phy;
1045 struct sas_phy *sphy = aphy->phy;
1046 unsigned long flags;
1047
1048 spin_lock_irqsave(&phy->lock, flags);
1049
1050 if (enable) {
1051 /* We may have been enabled already; if so, don't touch */
1052 if (!phy->enable)
1053 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
1054 hisi_hba->hw->phy_start(hisi_hba, phy_no);
1055 } else {
1056 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
1057 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1058 }
1059 phy->enable = enable;
1060 spin_unlock_irqrestore(&phy->lock, flags);
1061 }
1062 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
1063
hisi_sas_port_notify_formed(struct asd_sas_phy * sas_phy)1064 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
1065 {
1066 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1067 struct asd_sas_port *sas_port = sas_phy->port;
1068 struct hisi_sas_port *port;
1069
1070 if (!sas_port)
1071 return;
1072
1073 port = to_hisi_sas_port(sas_port);
1074 port->port_attached = 1;
1075 port->id = phy->port_id;
1076 phy->port = port;
1077 sas_port->lldd_port = port;
1078 }
1079
hisi_sas_do_release_task(struct hisi_hba * hisi_hba,struct sas_task * task,struct hisi_sas_slot * slot,bool need_lock)1080 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1081 struct hisi_sas_slot *slot, bool need_lock)
1082 {
1083 if (task) {
1084 unsigned long flags;
1085 struct task_status_struct *ts;
1086
1087 ts = &task->task_status;
1088
1089 ts->resp = SAS_TASK_COMPLETE;
1090 ts->stat = SAS_ABORTED_TASK;
1091 spin_lock_irqsave(&task->task_state_lock, flags);
1092 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1093 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1094 task->task_state_flags |= SAS_TASK_STATE_DONE;
1095 spin_unlock_irqrestore(&task->task_state_lock, flags);
1096 }
1097
1098 hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock);
1099 }
1100
hisi_sas_release_task(struct hisi_hba * hisi_hba,struct domain_device * device)1101 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1102 struct domain_device *device)
1103 {
1104 struct hisi_sas_slot *slot, *slot2;
1105 struct hisi_sas_device *sas_dev = device->lldd_dev;
1106
1107 spin_lock(&sas_dev->lock);
1108 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1109 hisi_sas_do_release_task(hisi_hba, slot->task, slot, false);
1110
1111 spin_unlock(&sas_dev->lock);
1112 }
1113
hisi_sas_release_tasks(struct hisi_hba * hisi_hba)1114 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1115 {
1116 struct hisi_sas_device *sas_dev;
1117 struct domain_device *device;
1118 int i;
1119
1120 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1121 sas_dev = &hisi_hba->devices[i];
1122 device = sas_dev->sas_device;
1123
1124 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1125 !device)
1126 continue;
1127
1128 hisi_sas_release_task(hisi_hba, device);
1129 }
1130 }
1131 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1132
hisi_sas_dereg_device(struct hisi_hba * hisi_hba,struct domain_device * device)1133 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1134 struct domain_device *device)
1135 {
1136 if (hisi_hba->hw->dereg_device)
1137 hisi_hba->hw->dereg_device(hisi_hba, device);
1138 }
1139
1140 static int
hisi_sas_internal_task_abort_dev(struct hisi_sas_device * sas_dev,bool rst_ha_timeout)1141 hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev,
1142 bool rst_ha_timeout)
1143 {
1144 struct hisi_sas_internal_abort_data data = { rst_ha_timeout };
1145 struct domain_device *device = sas_dev->sas_device;
1146 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1147 int i, rc;
1148
1149 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
1150 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1151 const struct cpumask *mask = cq->irq_mask;
1152
1153 if (mask && !cpumask_intersects(cpu_online_mask, mask))
1154 continue;
1155 rc = sas_execute_internal_abort_dev(device, i, &data);
1156 if (rc)
1157 return rc;
1158 }
1159
1160 return 0;
1161 }
1162
hisi_sas_dev_gone(struct domain_device * device)1163 static void hisi_sas_dev_gone(struct domain_device *device)
1164 {
1165 struct hisi_sas_device *sas_dev = device->lldd_dev;
1166 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1167 struct device *dev = hisi_hba->dev;
1168 int ret = 0;
1169
1170 dev_info(dev, "dev[%d:%x] is gone\n",
1171 sas_dev->device_id, sas_dev->dev_type);
1172
1173 down(&hisi_hba->sem);
1174 if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1175 hisi_sas_internal_task_abort_dev(sas_dev, true);
1176
1177 hisi_sas_dereg_device(hisi_hba, device);
1178
1179 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1180 device->lldd_dev = NULL;
1181 }
1182
1183 if (hisi_hba->hw->free_device)
1184 hisi_hba->hw->free_device(sas_dev);
1185
1186 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1187 if (!ret)
1188 sas_dev->dev_type = SAS_PHY_UNUSED;
1189 sas_dev->sas_device = NULL;
1190 up(&hisi_hba->sem);
1191 }
1192
hisi_sas_phy_set_linkrate(struct hisi_hba * hisi_hba,int phy_no,struct sas_phy_linkrates * r)1193 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1194 struct sas_phy_linkrates *r)
1195 {
1196 struct sas_phy_linkrates _r;
1197
1198 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1199 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1200 enum sas_linkrate min, max;
1201
1202 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1203 return -EINVAL;
1204
1205 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1206 max = sas_phy->phy->maximum_linkrate;
1207 min = r->minimum_linkrate;
1208 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1209 max = r->maximum_linkrate;
1210 min = sas_phy->phy->minimum_linkrate;
1211 } else
1212 return -EINVAL;
1213
1214 _r.maximum_linkrate = max;
1215 _r.minimum_linkrate = min;
1216
1217 sas_phy->phy->maximum_linkrate = max;
1218 sas_phy->phy->minimum_linkrate = min;
1219
1220 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1221 msleep(100);
1222 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1223 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1224
1225 return 0;
1226 }
1227
hisi_sas_control_phy(struct asd_sas_phy * sas_phy,enum phy_func func,void * funcdata)1228 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1229 void *funcdata)
1230 {
1231 struct hisi_sas_phy *phy = container_of(sas_phy,
1232 struct hisi_sas_phy, sas_phy);
1233 struct sas_ha_struct *sas_ha = sas_phy->ha;
1234 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1235 struct device *dev = hisi_hba->dev;
1236 DECLARE_COMPLETION_ONSTACK(completion);
1237 int phy_no = sas_phy->id;
1238 u8 sts = phy->phy_attached;
1239 int ret = 0;
1240
1241 down(&hisi_hba->sem);
1242 phy->reset_completion = &completion;
1243
1244 switch (func) {
1245 case PHY_FUNC_HARD_RESET:
1246 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1247 break;
1248
1249 case PHY_FUNC_LINK_RESET:
1250 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1251 msleep(100);
1252 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1253 break;
1254
1255 case PHY_FUNC_DISABLE:
1256 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1257 goto out;
1258
1259 case PHY_FUNC_SET_LINK_RATE:
1260 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1261 break;
1262
1263 case PHY_FUNC_GET_EVENTS:
1264 if (hisi_hba->hw->get_events) {
1265 hisi_hba->hw->get_events(hisi_hba, phy_no);
1266 goto out;
1267 }
1268 fallthrough;
1269 case PHY_FUNC_RELEASE_SPINUP_HOLD:
1270 default:
1271 ret = -EOPNOTSUPP;
1272 goto out;
1273 }
1274
1275 if (sts && !wait_for_completion_timeout(&completion,
1276 HISI_SAS_WAIT_PHYUP_TIMEOUT)) {
1277 dev_warn(dev, "phy%d wait phyup timed out for func %d\n",
1278 phy_no, func);
1279 if (phy->in_reset)
1280 ret = -ETIMEDOUT;
1281 }
1282
1283 out:
1284 phy->reset_completion = NULL;
1285
1286 up(&hisi_hba->sem);
1287 return ret;
1288 }
1289
hisi_sas_fill_ata_reset_cmd(struct ata_device * dev,bool reset,int pmp,u8 * fis)1290 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1291 bool reset, int pmp, u8 *fis)
1292 {
1293 struct ata_taskfile tf;
1294
1295 ata_tf_init(dev, &tf);
1296 if (reset)
1297 tf.ctl |= ATA_SRST;
1298 else
1299 tf.ctl &= ~ATA_SRST;
1300 tf.command = ATA_CMD_DEV_RESET;
1301 ata_tf_to_fis(&tf, pmp, 0, fis);
1302 }
1303
hisi_sas_softreset_ata_disk(struct domain_device * device)1304 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1305 {
1306 u8 fis[20] = {0};
1307 struct ata_port *ap = device->sata_dev.ap;
1308 struct ata_link *link;
1309 int rc = TMF_RESP_FUNC_FAILED;
1310 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1311 struct device *dev = hisi_hba->dev;
1312
1313 ata_for_each_link(link, ap, EDGE) {
1314 int pmp = sata_srst_pmp(link);
1315
1316 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1317 rc = sas_execute_ata_cmd(device, fis, -1);
1318 if (rc != TMF_RESP_FUNC_COMPLETE)
1319 break;
1320 }
1321
1322 if (rc == TMF_RESP_FUNC_COMPLETE) {
1323 ata_for_each_link(link, ap, EDGE) {
1324 int pmp = sata_srst_pmp(link);
1325
1326 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1327 rc = sas_execute_ata_cmd(device, fis, -1);
1328 if (rc != TMF_RESP_FUNC_COMPLETE)
1329 dev_err(dev, "ata disk %016llx de-reset failed\n",
1330 SAS_ADDR(device->sas_addr));
1331 }
1332 } else {
1333 dev_err(dev, "ata disk %016llx reset failed\n",
1334 SAS_ADDR(device->sas_addr));
1335 }
1336
1337 if (rc == TMF_RESP_FUNC_COMPLETE)
1338 hisi_sas_release_task(hisi_hba, device);
1339
1340 return rc;
1341 }
1342
hisi_sas_refresh_port_id(struct hisi_hba * hisi_hba)1343 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1344 {
1345 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1346 int i;
1347
1348 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1349 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1350 struct domain_device *device = sas_dev->sas_device;
1351 struct asd_sas_port *sas_port;
1352 struct hisi_sas_port *port;
1353 struct hisi_sas_phy *phy = NULL;
1354 struct asd_sas_phy *sas_phy;
1355
1356 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1357 || !device || !device->port)
1358 continue;
1359
1360 sas_port = device->port;
1361 port = to_hisi_sas_port(sas_port);
1362
1363 spin_lock(&sas_port->phy_list_lock);
1364 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1365 if (state & BIT(sas_phy->id)) {
1366 phy = sas_phy->lldd_phy;
1367 break;
1368 }
1369 spin_unlock(&sas_port->phy_list_lock);
1370
1371 if (phy) {
1372 port->id = phy->port_id;
1373
1374 /* Update linkrate of directly attached device. */
1375 if (!device->parent)
1376 device->linkrate = phy->sas_phy.linkrate;
1377
1378 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1379 } else if (!port->port_attached)
1380 port->id = 0xff;
1381 }
1382 }
1383
hisi_sas_rescan_topology(struct hisi_hba * hisi_hba,u32 state)1384 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1385 {
1386 struct asd_sas_port *_sas_port = NULL;
1387 int phy_no;
1388
1389 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1390 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1391 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1392 struct asd_sas_port *sas_port = sas_phy->port;
1393 bool do_port_check = _sas_port != sas_port;
1394
1395 if (!sas_phy->phy->enabled)
1396 continue;
1397
1398 /* Report PHY state change to libsas */
1399 if (state & BIT(phy_no)) {
1400 if (do_port_check && sas_port && sas_port->port_dev) {
1401 struct domain_device *dev = sas_port->port_dev;
1402
1403 _sas_port = sas_port;
1404
1405 if (dev_is_expander(dev->dev_type))
1406 sas_notify_port_event(sas_phy,
1407 PORTE_BROADCAST_RCVD,
1408 GFP_KERNEL);
1409 }
1410 } else {
1411 hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1412 }
1413 }
1414 }
1415
hisi_sas_reset_init_all_devices(struct hisi_hba * hisi_hba)1416 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1417 {
1418 struct hisi_sas_device *sas_dev;
1419 struct domain_device *device;
1420 int i;
1421
1422 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1423 sas_dev = &hisi_hba->devices[i];
1424 device = sas_dev->sas_device;
1425
1426 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1427 continue;
1428
1429 hisi_sas_init_device(device);
1430 }
1431 }
1432
hisi_sas_send_ata_reset_each_phy(struct hisi_hba * hisi_hba,struct asd_sas_port * sas_port,struct domain_device * device)1433 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1434 struct asd_sas_port *sas_port,
1435 struct domain_device *device)
1436 {
1437 struct ata_port *ap = device->sata_dev.ap;
1438 struct device *dev = hisi_hba->dev;
1439 int rc = TMF_RESP_FUNC_FAILED;
1440 struct ata_link *link;
1441 u8 fis[20] = {0};
1442 int i;
1443
1444 for (i = 0; i < hisi_hba->n_phy; i++) {
1445 if (!(sas_port->phy_mask & BIT(i)))
1446 continue;
1447
1448 ata_for_each_link(link, ap, EDGE) {
1449 int pmp = sata_srst_pmp(link);
1450
1451 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1452 rc = sas_execute_ata_cmd(device, fis, i);
1453 if (rc != TMF_RESP_FUNC_COMPLETE) {
1454 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1455 i, rc);
1456 break;
1457 }
1458 }
1459 }
1460 }
1461
hisi_sas_terminate_stp_reject(struct hisi_hba * hisi_hba)1462 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1463 {
1464 struct device *dev = hisi_hba->dev;
1465 int port_no, rc, i;
1466
1467 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1468 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1469 struct domain_device *device = sas_dev->sas_device;
1470
1471 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1472 continue;
1473
1474 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1475 if (rc < 0)
1476 dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1477 }
1478
1479 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1480 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1481 struct asd_sas_port *sas_port = &port->sas_port;
1482 struct domain_device *port_dev = sas_port->port_dev;
1483 struct domain_device *device;
1484
1485 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1486 continue;
1487
1488 /* Try to find a SATA device */
1489 list_for_each_entry(device, &sas_port->dev_list,
1490 dev_list_node) {
1491 if (dev_is_sata(device)) {
1492 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1493 sas_port,
1494 device);
1495 break;
1496 }
1497 }
1498 }
1499 }
1500
hisi_sas_controller_reset_prepare(struct hisi_hba * hisi_hba)1501 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1502 {
1503 struct Scsi_Host *shost = hisi_hba->shost;
1504
1505 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1506
1507 scsi_block_requests(shost);
1508 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1509
1510 del_timer_sync(&hisi_hba->timer);
1511
1512 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1513 }
1514 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1515
hisi_sas_async_init_wait_phyup(void * data,async_cookie_t cookie)1516 static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie)
1517 {
1518 struct hisi_sas_phy *phy = data;
1519 struct hisi_hba *hisi_hba = phy->hisi_hba;
1520 struct device *dev = hisi_hba->dev;
1521 DECLARE_COMPLETION_ONSTACK(completion);
1522 int phy_no = phy->sas_phy.id;
1523
1524 phy->reset_completion = &completion;
1525 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1526 if (!wait_for_completion_timeout(&completion,
1527 HISI_SAS_WAIT_PHYUP_TIMEOUT))
1528 dev_warn(dev, "phy%d wait phyup timed out\n", phy_no);
1529
1530 phy->reset_completion = NULL;
1531 }
1532
hisi_sas_controller_reset_done(struct hisi_hba * hisi_hba)1533 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1534 {
1535 struct Scsi_Host *shost = hisi_hba->shost;
1536 ASYNC_DOMAIN_EXCLUSIVE(async);
1537 int phy_no;
1538
1539 /* Init and wait for PHYs to come up and all libsas event finished. */
1540 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1541 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1542
1543 if (!(hisi_hba->phy_state & BIT(phy_no)))
1544 continue;
1545
1546 async_schedule_domain(hisi_sas_async_init_wait_phyup,
1547 phy, &async);
1548 }
1549
1550 async_synchronize_full_domain(&async);
1551 hisi_sas_refresh_port_id(hisi_hba);
1552 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1553
1554 if (hisi_hba->reject_stp_links_msk)
1555 hisi_sas_terminate_stp_reject(hisi_hba);
1556 hisi_sas_reset_init_all_devices(hisi_hba);
1557 scsi_unblock_requests(shost);
1558 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1559 up(&hisi_hba->sem);
1560
1561 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1562 }
1563 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1564
hisi_sas_controller_prereset(struct hisi_hba * hisi_hba)1565 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1566 {
1567 if (!hisi_hba->hw->soft_reset)
1568 return -1;
1569
1570 down(&hisi_hba->sem);
1571 if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1572 up(&hisi_hba->sem);
1573 return -1;
1574 }
1575
1576 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1577 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1578
1579 return 0;
1580 }
1581
hisi_sas_controller_reset(struct hisi_hba * hisi_hba)1582 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1583 {
1584 struct device *dev = hisi_hba->dev;
1585 struct Scsi_Host *shost = hisi_hba->shost;
1586 int rc;
1587
1588 dev_info(dev, "controller resetting...\n");
1589 hisi_sas_controller_reset_prepare(hisi_hba);
1590
1591 rc = hisi_hba->hw->soft_reset(hisi_hba);
1592 if (rc) {
1593 dev_warn(dev, "controller reset failed (%d)\n", rc);
1594 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1595 up(&hisi_hba->sem);
1596 scsi_unblock_requests(shost);
1597 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1598 return rc;
1599 }
1600 clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1601
1602 hisi_sas_controller_reset_done(hisi_hba);
1603 dev_info(dev, "controller reset complete\n");
1604
1605 return 0;
1606 }
1607
hisi_sas_abort_task(struct sas_task * task)1608 static int hisi_sas_abort_task(struct sas_task *task)
1609 {
1610 struct hisi_sas_internal_abort_data internal_abort_data = { false };
1611 struct domain_device *device = task->dev;
1612 struct hisi_sas_device *sas_dev = device->lldd_dev;
1613 struct hisi_sas_slot *slot = task->lldd_task;
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_cq *cq;
1628
1629 if (slot) {
1630 /*
1631 * sync irq or poll queue to avoid free'ing task
1632 * before using task in IO completion
1633 */
1634 cq = &hisi_hba->cq[slot->dlvry_queue];
1635 hisi_sas_sync_cq(cq);
1636 }
1637 spin_unlock_irqrestore(&task->task_state_lock, flags);
1638 rc = TMF_RESP_FUNC_COMPLETE;
1639 goto out;
1640 }
1641 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1642 spin_unlock_irqrestore(&task->task_state_lock, flags);
1643
1644 if (slot && task->task_proto & SAS_PROTOCOL_SSP) {
1645 u16 tag = slot->idx;
1646 int rc2;
1647
1648 rc = sas_abort_task(task, tag);
1649 rc2 = sas_execute_internal_abort_single(device, tag,
1650 slot->dlvry_queue, &internal_abort_data);
1651 if (rc2 < 0) {
1652 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1653 return TMF_RESP_FUNC_FAILED;
1654 }
1655
1656 /*
1657 * If the TMF finds that the IO is not in the device and also
1658 * the internal abort does not succeed, then it is safe to
1659 * free the slot.
1660 * Note: if the internal abort succeeds then the slot
1661 * will have already been completed
1662 */
1663 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1664 if (task->lldd_task)
1665 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1666 }
1667 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1668 task->task_proto & SAS_PROTOCOL_STP) {
1669 if (task->dev->dev_type == SAS_SATA_DEV) {
1670 struct ata_queued_cmd *qc = task->uldd_task;
1671
1672 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1673 if (rc < 0) {
1674 dev_err(dev, "abort task: internal abort failed\n");
1675 goto out;
1676 }
1677 hisi_sas_dereg_device(hisi_hba, device);
1678
1679 /*
1680 * If an ATA internal command times out in ATA EH, it
1681 * need to execute soft reset, so check the scsicmd
1682 */
1683 if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) &&
1684 qc && qc->scsicmd) {
1685 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1686 rc = TMF_RESP_FUNC_COMPLETE;
1687 } else {
1688 rc = hisi_sas_softreset_ata_disk(device);
1689 }
1690 }
1691 } else if (slot && task->task_proto & SAS_PROTOCOL_SMP) {
1692 /* SMP */
1693 u32 tag = slot->idx;
1694 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1695
1696 rc = sas_execute_internal_abort_single(device,
1697 tag, slot->dlvry_queue,
1698 &internal_abort_data);
1699 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1700 task->lldd_task) {
1701 /*
1702 * sync irq or poll queue to avoid free'ing task
1703 * before using task in IO completion
1704 */
1705 hisi_sas_sync_cq(cq);
1706 slot->task = NULL;
1707 }
1708 }
1709
1710 out:
1711 if (rc != TMF_RESP_FUNC_COMPLETE)
1712 dev_notice(dev, "abort task: rc=%d\n", rc);
1713 return rc;
1714 }
1715
hisi_sas_abort_task_set(struct domain_device * device,u8 * lun)1716 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1717 {
1718 struct hisi_sas_device *sas_dev = device->lldd_dev;
1719 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1720 struct device *dev = hisi_hba->dev;
1721 int rc;
1722
1723 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1724 if (rc < 0) {
1725 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1726 return TMF_RESP_FUNC_FAILED;
1727 }
1728 hisi_sas_dereg_device(hisi_hba, device);
1729
1730 rc = sas_abort_task_set(device, lun);
1731 if (rc == TMF_RESP_FUNC_COMPLETE)
1732 hisi_sas_release_task(hisi_hba, device);
1733
1734 return rc;
1735 }
1736
hisi_sas_debug_I_T_nexus_reset(struct domain_device * device)1737 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1738 {
1739 struct sas_phy *local_phy = sas_get_local_phy(device);
1740 struct hisi_sas_device *sas_dev = device->lldd_dev;
1741 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1742 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1743 int rc, reset_type;
1744
1745 if (!local_phy->enabled) {
1746 sas_put_local_phy(local_phy);
1747 return -ENODEV;
1748 }
1749
1750 if (scsi_is_sas_phy_local(local_phy)) {
1751 struct asd_sas_phy *sas_phy =
1752 sas_ha->sas_phy[local_phy->number];
1753 struct hisi_sas_phy *phy =
1754 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1755 unsigned long flags;
1756
1757 spin_lock_irqsave(&phy->lock, flags);
1758 phy->in_reset = 1;
1759 spin_unlock_irqrestore(&phy->lock, flags);
1760 }
1761
1762 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1763 !dev_is_sata(device)) ? true : false;
1764
1765 rc = sas_phy_reset(local_phy, reset_type);
1766 sas_put_local_phy(local_phy);
1767
1768 if (scsi_is_sas_phy_local(local_phy)) {
1769 struct asd_sas_phy *sas_phy =
1770 sas_ha->sas_phy[local_phy->number];
1771 struct hisi_sas_phy *phy =
1772 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1773 unsigned long flags;
1774
1775 spin_lock_irqsave(&phy->lock, flags);
1776 phy->in_reset = 0;
1777 spin_unlock_irqrestore(&phy->lock, flags);
1778
1779 /* report PHY down if timed out */
1780 if (rc == -ETIMEDOUT)
1781 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1782 return rc;
1783 }
1784
1785 /* Remote phy */
1786 if (rc)
1787 return rc;
1788
1789 if (dev_is_sata(device)) {
1790 struct ata_link *link = &device->sata_dev.ap->link;
1791
1792 rc = ata_wait_after_reset(link, HISI_SAS_WAIT_PHYUP_TIMEOUT,
1793 smp_ata_check_ready_type);
1794 } else {
1795 msleep(2000);
1796 }
1797
1798 return rc;
1799 }
1800
hisi_sas_I_T_nexus_reset(struct domain_device * device)1801 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1802 {
1803 struct hisi_sas_device *sas_dev = device->lldd_dev;
1804 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1805 struct device *dev = hisi_hba->dev;
1806 int rc;
1807
1808 if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
1809 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1810
1811 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1812 if (rc < 0) {
1813 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1814 return TMF_RESP_FUNC_FAILED;
1815 }
1816 hisi_sas_dereg_device(hisi_hba, device);
1817
1818 rc = hisi_sas_debug_I_T_nexus_reset(device);
1819 if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) {
1820 struct sas_phy *local_phy;
1821
1822 rc = hisi_sas_softreset_ata_disk(device);
1823 switch (rc) {
1824 case -ECOMM:
1825 rc = -ENODEV;
1826 break;
1827 case TMF_RESP_FUNC_FAILED:
1828 case -EMSGSIZE:
1829 case -EIO:
1830 local_phy = sas_get_local_phy(device);
1831 rc = sas_phy_enable(local_phy, 0);
1832 if (!rc) {
1833 local_phy->enabled = 0;
1834 dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n",
1835 SAS_ADDR(device->sas_addr), rc);
1836 rc = -ENODEV;
1837 }
1838 sas_put_local_phy(local_phy);
1839 break;
1840 default:
1841 break;
1842 }
1843 }
1844
1845 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1846 hisi_sas_release_task(hisi_hba, device);
1847
1848 return rc;
1849 }
1850
hisi_sas_lu_reset(struct domain_device * device,u8 * lun)1851 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1852 {
1853 struct hisi_sas_device *sas_dev = device->lldd_dev;
1854 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1855 struct device *dev = hisi_hba->dev;
1856 int rc = TMF_RESP_FUNC_FAILED;
1857
1858 /* Clear internal IO and then lu reset */
1859 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1860 if (rc < 0) {
1861 dev_err(dev, "lu_reset: internal abort failed\n");
1862 goto out;
1863 }
1864 hisi_sas_dereg_device(hisi_hba, device);
1865
1866 if (dev_is_sata(device)) {
1867 struct sas_phy *phy;
1868
1869 phy = sas_get_local_phy(device);
1870
1871 rc = sas_phy_reset(phy, true);
1872
1873 if (rc == 0)
1874 hisi_sas_release_task(hisi_hba, device);
1875 sas_put_local_phy(phy);
1876 } else {
1877 rc = sas_lu_reset(device, lun);
1878 if (rc == TMF_RESP_FUNC_COMPLETE)
1879 hisi_sas_release_task(hisi_hba, device);
1880 }
1881 out:
1882 if (rc != TMF_RESP_FUNC_COMPLETE)
1883 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1884 sas_dev->device_id, rc);
1885 return rc;
1886 }
1887
hisi_sas_async_I_T_nexus_reset(void * data,async_cookie_t cookie)1888 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1889 {
1890 struct domain_device *device = data;
1891 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1892 int rc;
1893
1894 rc = hisi_sas_debug_I_T_nexus_reset(device);
1895 if (rc != TMF_RESP_FUNC_COMPLETE)
1896 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1897 SAS_ADDR(device->sas_addr), rc);
1898 }
1899
hisi_sas_clear_nexus_ha(struct sas_ha_struct * sas_ha)1900 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1901 {
1902 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1903 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1904 ASYNC_DOMAIN_EXCLUSIVE(async);
1905 int i;
1906
1907 queue_work(hisi_hba->wq, &r.work);
1908 wait_for_completion(r.completion);
1909 if (!r.done)
1910 return TMF_RESP_FUNC_FAILED;
1911
1912 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1913 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1914 struct domain_device *device = sas_dev->sas_device;
1915
1916 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1917 dev_is_expander(device->dev_type))
1918 continue;
1919
1920 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1921 device, &async);
1922 }
1923
1924 async_synchronize_full_domain(&async);
1925 hisi_sas_release_tasks(hisi_hba);
1926
1927 return TMF_RESP_FUNC_COMPLETE;
1928 }
1929
hisi_sas_query_task(struct sas_task * task)1930 static int hisi_sas_query_task(struct sas_task *task)
1931 {
1932 int rc = TMF_RESP_FUNC_FAILED;
1933
1934 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1935 struct hisi_sas_slot *slot = task->lldd_task;
1936 u32 tag = slot->idx;
1937
1938 rc = sas_query_task(task, tag);
1939 switch (rc) {
1940 /* The task is still in Lun, release it then */
1941 case TMF_RESP_FUNC_SUCC:
1942 /* The task is not in Lun or failed, reset the phy */
1943 case TMF_RESP_FUNC_FAILED:
1944 case TMF_RESP_FUNC_COMPLETE:
1945 break;
1946 default:
1947 rc = TMF_RESP_FUNC_FAILED;
1948 break;
1949 }
1950 }
1951 return rc;
1952 }
1953
hisi_sas_internal_abort_timeout(struct sas_task * task,void * data)1954 static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
1955 void *data)
1956 {
1957 struct domain_device *device = task->dev;
1958 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1959 struct hisi_sas_internal_abort_data *timeout = data;
1960
1961 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1962 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
1963
1964 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1965 pr_err("Internal abort: timeout %016llx\n",
1966 SAS_ADDR(device->sas_addr));
1967 } else {
1968 struct hisi_sas_slot *slot = task->lldd_task;
1969
1970 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1971
1972 if (slot) {
1973 struct hisi_sas_cq *cq =
1974 &hisi_hba->cq[slot->dlvry_queue];
1975 /*
1976 * sync irq or poll queue to avoid free'ing task
1977 * before using task in IO completion
1978 */
1979 hisi_sas_sync_cq(cq);
1980 slot->task = NULL;
1981 }
1982
1983 if (timeout->rst_ha_timeout) {
1984 pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n",
1985 SAS_ADDR(device->sas_addr));
1986 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
1987 } else {
1988 pr_err("Internal abort: timeout and not done %016llx.\n",
1989 SAS_ADDR(device->sas_addr));
1990 }
1991
1992 return true;
1993 }
1994
1995 return false;
1996 }
1997
hisi_sas_port_formed(struct asd_sas_phy * sas_phy)1998 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1999 {
2000 hisi_sas_port_notify_formed(sas_phy);
2001 }
2002
hisi_sas_write_gpio(struct sas_ha_struct * sha,u8 reg_type,u8 reg_index,u8 reg_count,u8 * write_data)2003 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2004 u8 reg_index, u8 reg_count, u8 *write_data)
2005 {
2006 struct hisi_hba *hisi_hba = sha->lldd_ha;
2007
2008 if (!hisi_hba->hw->write_gpio)
2009 return -EOPNOTSUPP;
2010
2011 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2012 reg_index, reg_count, write_data);
2013 }
2014
hisi_sas_phy_disconnected(struct hisi_sas_phy * phy)2015 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2016 {
2017 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2018 struct sas_phy *sphy = sas_phy->phy;
2019 unsigned long flags;
2020
2021 phy->phy_attached = 0;
2022 phy->phy_type = 0;
2023 phy->port = NULL;
2024
2025 spin_lock_irqsave(&phy->lock, flags);
2026 if (phy->enable)
2027 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2028 else
2029 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2030 spin_unlock_irqrestore(&phy->lock, flags);
2031 }
2032
hisi_sas_phy_down(struct hisi_hba * hisi_hba,int phy_no,int rdy,gfp_t gfp_flags)2033 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2034 gfp_t gfp_flags)
2035 {
2036 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2037 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2038 struct device *dev = hisi_hba->dev;
2039
2040 if (rdy) {
2041 /* Phy down but ready */
2042 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2043 hisi_sas_port_notify_formed(sas_phy);
2044 } else {
2045 struct hisi_sas_port *port = phy->port;
2046
2047 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||
2048 phy->in_reset) {
2049 dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2050 return;
2051 }
2052 /* Phy down and not ready */
2053 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2054 sas_phy_disconnected(sas_phy);
2055
2056 if (port) {
2057 if (phy->phy_type & PORT_TYPE_SAS) {
2058 int port_id = port->id;
2059
2060 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2061 port_id))
2062 port->port_attached = 0;
2063 } else if (phy->phy_type & PORT_TYPE_SATA)
2064 port->port_attached = 0;
2065 }
2066 hisi_sas_phy_disconnected(phy);
2067 }
2068 }
2069 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2070
hisi_sas_phy_bcast(struct hisi_sas_phy * phy)2071 void hisi_sas_phy_bcast(struct hisi_sas_phy *phy)
2072 {
2073 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2074 struct hisi_hba *hisi_hba = phy->hisi_hba;
2075
2076 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags))
2077 return;
2078
2079 sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC);
2080 }
2081 EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast);
2082
hisi_sas_host_reset(struct Scsi_Host * shost,int reset_type)2083 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2084 {
2085 struct hisi_hba *hisi_hba = shost_priv(shost);
2086
2087 if (reset_type != SCSI_ADAPTER_RESET)
2088 return -EOPNOTSUPP;
2089
2090 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2091
2092 return 0;
2093 }
2094 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2095
2096 struct scsi_transport_template *hisi_sas_stt;
2097 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2098
2099 static struct sas_domain_function_template hisi_sas_transport_ops = {
2100 .lldd_dev_found = hisi_sas_dev_found,
2101 .lldd_dev_gone = hisi_sas_dev_gone,
2102 .lldd_execute_task = hisi_sas_queue_command,
2103 .lldd_control_phy = hisi_sas_control_phy,
2104 .lldd_abort_task = hisi_sas_abort_task,
2105 .lldd_abort_task_set = hisi_sas_abort_task_set,
2106 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
2107 .lldd_lu_reset = hisi_sas_lu_reset,
2108 .lldd_query_task = hisi_sas_query_task,
2109 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
2110 .lldd_port_formed = hisi_sas_port_formed,
2111 .lldd_write_gpio = hisi_sas_write_gpio,
2112 .lldd_tmf_aborted = hisi_sas_tmf_aborted,
2113 .lldd_abort_timeout = hisi_sas_internal_abort_timeout,
2114 };
2115
hisi_sas_init_mem(struct hisi_hba * hisi_hba)2116 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2117 {
2118 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2119 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2120
2121 for (i = 0; i < hisi_hba->queue_count; i++) {
2122 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2123 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2124 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2125
2126 s = sizeof(struct hisi_sas_cmd_hdr);
2127 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2128 memset(&cmd_hdr[j], 0, s);
2129
2130 dq->wr_point = 0;
2131
2132 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2133 memset(hisi_hba->complete_hdr[i], 0, s);
2134 cq->rd_point = 0;
2135 }
2136
2137 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2138 memset(hisi_hba->initial_fis, 0, s);
2139
2140 s = max_command_entries * sizeof(struct hisi_sas_iost);
2141 memset(hisi_hba->iost, 0, s);
2142
2143 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2144 memset(hisi_hba->breakpoint, 0, s);
2145
2146 s = sizeof(struct hisi_sas_sata_breakpoint);
2147 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2148 memset(&sata_breakpoint[j], 0, s);
2149 }
2150 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2151
hisi_sas_alloc(struct hisi_hba * hisi_hba)2152 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2153 {
2154 struct device *dev = hisi_hba->dev;
2155 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2156 int max_command_entries_ru, sz_slot_buf_ru;
2157 int blk_cnt, slots_per_blk;
2158
2159 sema_init(&hisi_hba->sem, 1);
2160 spin_lock_init(&hisi_hba->lock);
2161 for (i = 0; i < hisi_hba->n_phy; i++) {
2162 hisi_sas_phy_init(hisi_hba, i);
2163 hisi_hba->port[i].port_attached = 0;
2164 hisi_hba->port[i].id = -1;
2165 }
2166
2167 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2168 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2169 hisi_hba->devices[i].device_id = i;
2170 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2171 }
2172
2173 for (i = 0; i < hisi_hba->queue_count; i++) {
2174 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2175 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2176
2177 /* Completion queue structure */
2178 cq->id = i;
2179 cq->hisi_hba = hisi_hba;
2180 spin_lock_init(&cq->poll_lock);
2181
2182 /* Delivery queue structure */
2183 spin_lock_init(&dq->lock);
2184 INIT_LIST_HEAD(&dq->list);
2185 dq->id = i;
2186 dq->hisi_hba = hisi_hba;
2187
2188 /* Delivery queue */
2189 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2190 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2191 &hisi_hba->cmd_hdr_dma[i],
2192 GFP_KERNEL);
2193 if (!hisi_hba->cmd_hdr[i])
2194 goto err_out;
2195
2196 /* Completion queue */
2197 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2198 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2199 &hisi_hba->complete_hdr_dma[i],
2200 GFP_KERNEL);
2201 if (!hisi_hba->complete_hdr[i])
2202 goto err_out;
2203 }
2204
2205 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2206 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2207 GFP_KERNEL);
2208 if (!hisi_hba->itct)
2209 goto err_out;
2210
2211 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2212 sizeof(struct hisi_sas_slot),
2213 GFP_KERNEL);
2214 if (!hisi_hba->slot_info)
2215 goto err_out;
2216
2217 /* roundup to avoid overly large block size */
2218 max_command_entries_ru = roundup(max_command_entries, 64);
2219 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2220 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2221 else
2222 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2223 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2224 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2225 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2226 slots_per_blk = s / sz_slot_buf_ru;
2227
2228 for (i = 0; i < blk_cnt; i++) {
2229 int slot_index = i * slots_per_blk;
2230 dma_addr_t buf_dma;
2231 void *buf;
2232
2233 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2234 GFP_KERNEL);
2235 if (!buf)
2236 goto err_out;
2237
2238 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2239 struct hisi_sas_slot *slot;
2240
2241 slot = &hisi_hba->slot_info[slot_index];
2242 slot->buf = buf;
2243 slot->buf_dma = buf_dma;
2244 slot->idx = slot_index;
2245
2246 buf += sz_slot_buf_ru;
2247 buf_dma += sz_slot_buf_ru;
2248 }
2249 }
2250
2251 s = max_command_entries * sizeof(struct hisi_sas_iost);
2252 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2253 GFP_KERNEL);
2254 if (!hisi_hba->iost)
2255 goto err_out;
2256
2257 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2258 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2259 &hisi_hba->breakpoint_dma,
2260 GFP_KERNEL);
2261 if (!hisi_hba->breakpoint)
2262 goto err_out;
2263
2264 s = hisi_hba->slot_index_count = max_command_entries;
2265 hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);
2266 if (!hisi_hba->slot_index_tags)
2267 goto err_out;
2268
2269 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2270 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2271 &hisi_hba->initial_fis_dma,
2272 GFP_KERNEL);
2273 if (!hisi_hba->initial_fis)
2274 goto err_out;
2275
2276 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2277 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2278 &hisi_hba->sata_breakpoint_dma,
2279 GFP_KERNEL);
2280 if (!hisi_hba->sata_breakpoint)
2281 goto err_out;
2282
2283 hisi_hba->last_slot_index = 0;
2284
2285 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2286 if (!hisi_hba->wq) {
2287 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2288 goto err_out;
2289 }
2290
2291 return 0;
2292 err_out:
2293 return -ENOMEM;
2294 }
2295 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2296
hisi_sas_free(struct hisi_hba * hisi_hba)2297 void hisi_sas_free(struct hisi_hba *hisi_hba)
2298 {
2299 int i;
2300
2301 for (i = 0; i < hisi_hba->n_phy; i++) {
2302 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2303
2304 del_timer_sync(&phy->timer);
2305 }
2306
2307 if (hisi_hba->wq)
2308 destroy_workqueue(hisi_hba->wq);
2309 }
2310 EXPORT_SYMBOL_GPL(hisi_sas_free);
2311
hisi_sas_rst_work_handler(struct work_struct * work)2312 void hisi_sas_rst_work_handler(struct work_struct *work)
2313 {
2314 struct hisi_hba *hisi_hba =
2315 container_of(work, struct hisi_hba, rst_work);
2316
2317 if (hisi_sas_controller_prereset(hisi_hba))
2318 return;
2319
2320 hisi_sas_controller_reset(hisi_hba);
2321 }
2322 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2323
hisi_sas_sync_rst_work_handler(struct work_struct * work)2324 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2325 {
2326 struct hisi_sas_rst *rst =
2327 container_of(work, struct hisi_sas_rst, work);
2328
2329 if (hisi_sas_controller_prereset(rst->hisi_hba))
2330 goto rst_complete;
2331
2332 if (!hisi_sas_controller_reset(rst->hisi_hba))
2333 rst->done = true;
2334 rst_complete:
2335 complete(rst->completion);
2336 }
2337 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2338
hisi_sas_get_fw_info(struct hisi_hba * hisi_hba)2339 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2340 {
2341 struct device *dev = hisi_hba->dev;
2342 struct platform_device *pdev = hisi_hba->platform_dev;
2343 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2344 struct clk *refclk;
2345
2346 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2347 SAS_ADDR_SIZE)) {
2348 dev_err(dev, "could not get property sas-addr\n");
2349 return -ENOENT;
2350 }
2351
2352 if (np) {
2353 /*
2354 * These properties are only required for platform device-based
2355 * controller with DT firmware.
2356 */
2357 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2358 "hisilicon,sas-syscon");
2359 if (IS_ERR(hisi_hba->ctrl)) {
2360 dev_err(dev, "could not get syscon\n");
2361 return -ENOENT;
2362 }
2363
2364 if (device_property_read_u32(dev, "ctrl-reset-reg",
2365 &hisi_hba->ctrl_reset_reg)) {
2366 dev_err(dev, "could not get property ctrl-reset-reg\n");
2367 return -ENOENT;
2368 }
2369
2370 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2371 &hisi_hba->ctrl_reset_sts_reg)) {
2372 dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2373 return -ENOENT;
2374 }
2375
2376 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2377 &hisi_hba->ctrl_clock_ena_reg)) {
2378 dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2379 return -ENOENT;
2380 }
2381 }
2382
2383 refclk = devm_clk_get(dev, NULL);
2384 if (IS_ERR(refclk))
2385 dev_dbg(dev, "no ref clk property\n");
2386 else
2387 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2388
2389 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2390 dev_err(dev, "could not get property phy-count\n");
2391 return -ENOENT;
2392 }
2393
2394 if (device_property_read_u32(dev, "queue-count",
2395 &hisi_hba->queue_count)) {
2396 dev_err(dev, "could not get property queue-count\n");
2397 return -ENOENT;
2398 }
2399
2400 return 0;
2401 }
2402 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2403
hisi_sas_shost_alloc(struct platform_device * pdev,const struct hisi_sas_hw * hw)2404 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2405 const struct hisi_sas_hw *hw)
2406 {
2407 struct resource *res;
2408 struct Scsi_Host *shost;
2409 struct hisi_hba *hisi_hba;
2410 struct device *dev = &pdev->dev;
2411 int error;
2412
2413 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2414 if (!shost) {
2415 dev_err(dev, "scsi host alloc failed\n");
2416 return NULL;
2417 }
2418 hisi_hba = shost_priv(shost);
2419
2420 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2421 hisi_hba->hw = hw;
2422 hisi_hba->dev = dev;
2423 hisi_hba->platform_dev = pdev;
2424 hisi_hba->shost = shost;
2425 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2426
2427 timer_setup(&hisi_hba->timer, NULL, 0);
2428
2429 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2430 goto err_out;
2431
2432 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2433 if (error) {
2434 dev_err(dev, "No usable DMA addressing method\n");
2435 goto err_out;
2436 }
2437
2438 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2439 if (IS_ERR(hisi_hba->regs))
2440 goto err_out;
2441
2442 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2443 if (res) {
2444 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2445 if (IS_ERR(hisi_hba->sgpio_regs))
2446 goto err_out;
2447 }
2448
2449 if (hisi_sas_alloc(hisi_hba)) {
2450 hisi_sas_free(hisi_hba);
2451 goto err_out;
2452 }
2453
2454 return shost;
2455 err_out:
2456 scsi_host_put(shost);
2457 dev_err(dev, "shost alloc failed\n");
2458 return NULL;
2459 }
2460
hisi_sas_interrupt_preinit(struct hisi_hba * hisi_hba)2461 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2462 {
2463 if (hisi_hba->hw->interrupt_preinit)
2464 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2465 return 0;
2466 }
2467
hisi_sas_probe(struct platform_device * pdev,const struct hisi_sas_hw * hw)2468 int hisi_sas_probe(struct platform_device *pdev,
2469 const struct hisi_sas_hw *hw)
2470 {
2471 struct Scsi_Host *shost;
2472 struct hisi_hba *hisi_hba;
2473 struct device *dev = &pdev->dev;
2474 struct asd_sas_phy **arr_phy;
2475 struct asd_sas_port **arr_port;
2476 struct sas_ha_struct *sha;
2477 int rc, phy_nr, port_nr, i;
2478
2479 shost = hisi_sas_shost_alloc(pdev, hw);
2480 if (!shost)
2481 return -ENOMEM;
2482
2483 sha = SHOST_TO_SAS_HA(shost);
2484 hisi_hba = shost_priv(shost);
2485 platform_set_drvdata(pdev, sha);
2486
2487 phy_nr = port_nr = hisi_hba->n_phy;
2488
2489 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2490 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2491 if (!arr_phy || !arr_port) {
2492 rc = -ENOMEM;
2493 goto err_out_ha;
2494 }
2495
2496 sha->sas_phy = arr_phy;
2497 sha->sas_port = arr_port;
2498 sha->lldd_ha = hisi_hba;
2499
2500 shost->transportt = hisi_sas_stt;
2501 shost->max_id = HISI_SAS_MAX_DEVICES;
2502 shost->max_lun = ~0;
2503 shost->max_channel = 1;
2504 shost->max_cmd_len = 16;
2505 if (hisi_hba->hw->slot_index_alloc) {
2506 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2507 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2508 } else {
2509 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2510 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2511 }
2512
2513 sha->sas_ha_name = DRV_NAME;
2514 sha->dev = hisi_hba->dev;
2515 sha->sas_addr = &hisi_hba->sas_addr[0];
2516 sha->num_phys = hisi_hba->n_phy;
2517 sha->shost = hisi_hba->shost;
2518
2519 for (i = 0; i < hisi_hba->n_phy; i++) {
2520 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2521 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2522 }
2523
2524 rc = hisi_sas_interrupt_preinit(hisi_hba);
2525 if (rc)
2526 goto err_out_ha;
2527
2528 rc = scsi_add_host(shost, &pdev->dev);
2529 if (rc)
2530 goto err_out_ha;
2531
2532 rc = sas_register_ha(sha);
2533 if (rc)
2534 goto err_out_register_ha;
2535
2536 rc = hisi_hba->hw->hw_init(hisi_hba);
2537 if (rc)
2538 goto err_out_hw_init;
2539
2540 scsi_scan_host(shost);
2541
2542 return 0;
2543
2544 err_out_hw_init:
2545 sas_unregister_ha(sha);
2546 err_out_register_ha:
2547 scsi_remove_host(shost);
2548 err_out_ha:
2549 hisi_sas_free(hisi_hba);
2550 scsi_host_put(shost);
2551 return rc;
2552 }
2553 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2554
hisi_sas_remove(struct platform_device * pdev)2555 void hisi_sas_remove(struct platform_device *pdev)
2556 {
2557 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2558 struct hisi_hba *hisi_hba = sha->lldd_ha;
2559 struct Scsi_Host *shost = sha->shost;
2560
2561 del_timer_sync(&hisi_hba->timer);
2562
2563 sas_unregister_ha(sha);
2564 sas_remove_host(shost);
2565
2566 hisi_sas_free(hisi_hba);
2567 scsi_host_put(shost);
2568 }
2569 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2570
2571 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2572 #define DEBUGFS_ENABLE_DEFAULT "enabled"
2573 bool hisi_sas_debugfs_enable = true;
2574 u32 hisi_sas_debugfs_dump_count = 50;
2575 #else
2576 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2577 bool hisi_sas_debugfs_enable;
2578 u32 hisi_sas_debugfs_dump_count = 1;
2579 #endif
2580
2581 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2582 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2583 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2584 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2585
2586 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2587 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2588 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2589
2590 struct dentry *hisi_sas_debugfs_dir;
2591 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2592
hisi_sas_init(void)2593 static __init int hisi_sas_init(void)
2594 {
2595 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2596 if (!hisi_sas_stt)
2597 return -ENOMEM;
2598
2599 if (hisi_sas_debugfs_enable) {
2600 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2601 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2602 pr_info("hisi_sas: Limiting debugfs dump count\n");
2603 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2604 }
2605 }
2606
2607 return 0;
2608 }
2609
hisi_sas_exit(void)2610 static __exit void hisi_sas_exit(void)
2611 {
2612 sas_release_transport(hisi_sas_stt);
2613
2614 debugfs_remove(hisi_sas_debugfs_dir);
2615 }
2616
2617 module_init(hisi_sas_init);
2618 module_exit(hisi_sas_exit);
2619
2620 MODULE_LICENSE("GPL");
2621 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2622 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2623 MODULE_ALIAS("platform:" DRV_NAME);
2624
