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 struct asd_sas_port *sas_port = sas_phy->port;
915 struct hisi_sas_port *port = phy->port;
916 struct device *dev = hisi_hba->dev;
917 struct domain_device *port_dev;
918 int phy_no = sas_phy->id;
919
920 if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) &&
921 sas_port && port && (port->id != phy->port_id)) {
922 dev_info(dev, "phy%d's hw port id changed from %d to %llu\n",
923 phy_no, port->id, phy->port_id);
924 port_dev = sas_port->port_dev;
925 if (port_dev && !dev_is_expander(port_dev->dev_type)) {
926 /*
927 * Set the device state to gone to block
928 * sending IO to the device.
929 */
930 set_bit(SAS_DEV_GONE, &port_dev->state);
931 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
932 return;
933 }
934 }
935
936 phy->wait_phyup_cnt = 0;
937 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
938 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
939 hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
940 }
941
hisi_sas_phyup_work(struct work_struct * work)942 static void hisi_sas_phyup_work(struct work_struct *work)
943 {
944 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);
945 }
946
hisi_sas_linkreset_work(struct work_struct * work)947 static void hisi_sas_linkreset_work(struct work_struct *work)
948 {
949 struct hisi_sas_phy *phy =
950 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
951 struct asd_sas_phy *sas_phy = &phy->sas_phy;
952
953 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
954 }
955
hisi_sas_phyup_pm_work(struct work_struct * work)956 static void hisi_sas_phyup_pm_work(struct work_struct *work)
957 {
958 struct hisi_sas_phy *phy =
959 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);
960 struct hisi_hba *hisi_hba = phy->hisi_hba;
961 struct device *dev = hisi_hba->dev;
962
963 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);
964 pm_runtime_put_sync(dev);
965 }
966
967 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
968 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
969 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
970 [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,
971 };
972
hisi_sas_notify_phy_event(struct hisi_sas_phy * phy,enum hisi_sas_phy_event event)973 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
974 enum hisi_sas_phy_event event)
975 {
976 struct hisi_hba *hisi_hba = phy->hisi_hba;
977
978 if (WARN_ON(event >= HISI_PHYES_NUM))
979 return false;
980
981 return queue_work(hisi_hba->wq, &phy->works[event]);
982 }
983 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
984
hisi_sas_wait_phyup_timedout(struct timer_list * t)985 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
986 {
987 struct hisi_sas_phy *phy = from_timer(phy, t, timer);
988 struct hisi_hba *hisi_hba = phy->hisi_hba;
989 struct device *dev = hisi_hba->dev;
990 int phy_no = phy->sas_phy.id;
991
992 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
993 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
994 }
995
996 #define HISI_SAS_WAIT_PHYUP_RETRIES 10
997
hisi_sas_phy_oob_ready(struct hisi_hba * hisi_hba,int phy_no)998 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
999 {
1000 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1001 struct device *dev = hisi_hba->dev;
1002 unsigned long flags;
1003
1004 dev_dbg(dev, "phy%d OOB ready\n", phy_no);
1005 spin_lock_irqsave(&phy->lock, flags);
1006 if (phy->phy_attached) {
1007 spin_unlock_irqrestore(&phy->lock, flags);
1008 return;
1009 }
1010
1011 if (!timer_pending(&phy->timer)) {
1012 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
1013 phy->wait_phyup_cnt++;
1014 phy->timer.expires = jiffies +
1015 HISI_SAS_WAIT_PHYUP_TIMEOUT;
1016 add_timer(&phy->timer);
1017 spin_unlock_irqrestore(&phy->lock, flags);
1018 return;
1019 }
1020
1021 dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
1022 phy_no, phy->wait_phyup_cnt);
1023 phy->wait_phyup_cnt = 0;
1024 }
1025 spin_unlock_irqrestore(&phy->lock, flags);
1026 }
1027
1028 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
1029
hisi_sas_phy_init(struct hisi_hba * hisi_hba,int phy_no)1030 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
1031 {
1032 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1033 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1034 int i;
1035
1036 phy->hisi_hba = hisi_hba;
1037 phy->port = NULL;
1038 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
1039 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
1040 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
1041 sas_phy->iproto = SAS_PROTOCOL_ALL;
1042 sas_phy->tproto = 0;
1043 sas_phy->role = PHY_ROLE_INITIATOR;
1044 sas_phy->oob_mode = OOB_NOT_CONNECTED;
1045 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
1046 sas_phy->id = phy_no;
1047 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
1048 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
1049 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
1050 sas_phy->lldd_phy = phy;
1051
1052 for (i = 0; i < HISI_PHYES_NUM; i++)
1053 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
1054
1055 spin_lock_init(&phy->lock);
1056
1057 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
1058 }
1059
1060 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
hisi_sas_phy_enable(struct hisi_hba * hisi_hba,int phy_no,int enable)1061 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
1062 {
1063 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1064 struct asd_sas_phy *aphy = &phy->sas_phy;
1065 struct sas_phy *sphy = aphy->phy;
1066 unsigned long flags;
1067
1068 spin_lock_irqsave(&phy->lock, flags);
1069
1070 if (enable) {
1071 /* We may have been enabled already; if so, don't touch */
1072 if (!phy->enable)
1073 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
1074 hisi_hba->hw->phy_start(hisi_hba, phy_no);
1075 } else {
1076 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
1077 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1078 }
1079 phy->enable = enable;
1080 spin_unlock_irqrestore(&phy->lock, flags);
1081 }
1082 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
1083
hisi_sas_port_notify_formed(struct asd_sas_phy * sas_phy)1084 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
1085 {
1086 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1087 struct asd_sas_port *sas_port = sas_phy->port;
1088 struct hisi_sas_port *port;
1089
1090 if (!sas_port)
1091 return;
1092
1093 port = to_hisi_sas_port(sas_port);
1094 port->port_attached = 1;
1095 port->id = phy->port_id;
1096 phy->port = port;
1097 sas_port->lldd_port = port;
1098 }
1099
hisi_sas_do_release_task(struct hisi_hba * hisi_hba,struct sas_task * task,struct hisi_sas_slot * slot,bool need_lock)1100 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1101 struct hisi_sas_slot *slot, bool need_lock)
1102 {
1103 if (task) {
1104 unsigned long flags;
1105 struct task_status_struct *ts;
1106
1107 ts = &task->task_status;
1108
1109 ts->resp = SAS_TASK_COMPLETE;
1110 ts->stat = SAS_ABORTED_TASK;
1111 spin_lock_irqsave(&task->task_state_lock, flags);
1112 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1113 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1114 task->task_state_flags |= SAS_TASK_STATE_DONE;
1115 spin_unlock_irqrestore(&task->task_state_lock, flags);
1116 }
1117
1118 hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock);
1119 }
1120
hisi_sas_release_task(struct hisi_hba * hisi_hba,struct domain_device * device)1121 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1122 struct domain_device *device)
1123 {
1124 struct hisi_sas_slot *slot, *slot2;
1125 struct hisi_sas_device *sas_dev = device->lldd_dev;
1126
1127 spin_lock(&sas_dev->lock);
1128 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1129 hisi_sas_do_release_task(hisi_hba, slot->task, slot, false);
1130
1131 spin_unlock(&sas_dev->lock);
1132 }
1133
hisi_sas_release_tasks(struct hisi_hba * hisi_hba)1134 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1135 {
1136 struct hisi_sas_device *sas_dev;
1137 struct domain_device *device;
1138 int i;
1139
1140 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1141 sas_dev = &hisi_hba->devices[i];
1142 device = sas_dev->sas_device;
1143
1144 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1145 !device)
1146 continue;
1147
1148 hisi_sas_release_task(hisi_hba, device);
1149 }
1150 }
1151 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1152
hisi_sas_dereg_device(struct hisi_hba * hisi_hba,struct domain_device * device)1153 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1154 struct domain_device *device)
1155 {
1156 if (hisi_hba->hw->dereg_device)
1157 hisi_hba->hw->dereg_device(hisi_hba, device);
1158 }
1159
1160 static int
hisi_sas_internal_task_abort_dev(struct hisi_sas_device * sas_dev,bool rst_ha_timeout)1161 hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev,
1162 bool rst_ha_timeout)
1163 {
1164 struct hisi_sas_internal_abort_data data = { rst_ha_timeout };
1165 struct domain_device *device = sas_dev->sas_device;
1166 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1167 int i, rc;
1168
1169 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
1170 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1171 const struct cpumask *mask = cq->irq_mask;
1172
1173 if (mask && !cpumask_intersects(cpu_online_mask, mask))
1174 continue;
1175 rc = sas_execute_internal_abort_dev(device, i, &data);
1176 if (rc)
1177 return rc;
1178 }
1179
1180 return 0;
1181 }
1182
hisi_sas_dev_gone(struct domain_device * device)1183 static void hisi_sas_dev_gone(struct domain_device *device)
1184 {
1185 struct hisi_sas_device *sas_dev = device->lldd_dev;
1186 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1187 struct device *dev = hisi_hba->dev;
1188 int ret = 0;
1189
1190 dev_info(dev, "dev[%d:%x] is gone\n",
1191 sas_dev->device_id, sas_dev->dev_type);
1192
1193 down(&hisi_hba->sem);
1194 if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1195 hisi_sas_internal_task_abort_dev(sas_dev, true);
1196
1197 hisi_sas_dereg_device(hisi_hba, device);
1198
1199 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1200 device->lldd_dev = NULL;
1201 }
1202
1203 if (hisi_hba->hw->free_device)
1204 hisi_hba->hw->free_device(sas_dev);
1205
1206 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1207 if (!ret)
1208 sas_dev->dev_type = SAS_PHY_UNUSED;
1209 sas_dev->sas_device = NULL;
1210 up(&hisi_hba->sem);
1211 }
1212
hisi_sas_phy_set_linkrate(struct hisi_hba * hisi_hba,int phy_no,struct sas_phy_linkrates * r)1213 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1214 struct sas_phy_linkrates *r)
1215 {
1216 struct sas_phy_linkrates _r;
1217
1218 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1219 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1220 enum sas_linkrate min, max;
1221
1222 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1223 return -EINVAL;
1224
1225 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1226 max = sas_phy->phy->maximum_linkrate;
1227 min = r->minimum_linkrate;
1228 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1229 max = r->maximum_linkrate;
1230 min = sas_phy->phy->minimum_linkrate;
1231 } else
1232 return -EINVAL;
1233
1234 _r.maximum_linkrate = max;
1235 _r.minimum_linkrate = min;
1236
1237 sas_phy->phy->maximum_linkrate = max;
1238 sas_phy->phy->minimum_linkrate = min;
1239
1240 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1241 msleep(100);
1242 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1243 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1244
1245 return 0;
1246 }
1247
hisi_sas_control_phy(struct asd_sas_phy * sas_phy,enum phy_func func,void * funcdata)1248 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1249 void *funcdata)
1250 {
1251 struct hisi_sas_phy *phy = container_of(sas_phy,
1252 struct hisi_sas_phy, sas_phy);
1253 struct sas_ha_struct *sas_ha = sas_phy->ha;
1254 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1255 struct device *dev = hisi_hba->dev;
1256 DECLARE_COMPLETION_ONSTACK(completion);
1257 int phy_no = sas_phy->id;
1258 u8 sts = phy->phy_attached;
1259 int ret = 0;
1260
1261 down(&hisi_hba->sem);
1262 phy->reset_completion = &completion;
1263
1264 switch (func) {
1265 case PHY_FUNC_HARD_RESET:
1266 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1267 break;
1268
1269 case PHY_FUNC_LINK_RESET:
1270 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1271 msleep(100);
1272 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1273 break;
1274
1275 case PHY_FUNC_DISABLE:
1276 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1277 goto out;
1278
1279 case PHY_FUNC_SET_LINK_RATE:
1280 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1281 break;
1282
1283 case PHY_FUNC_GET_EVENTS:
1284 if (hisi_hba->hw->get_events) {
1285 hisi_hba->hw->get_events(hisi_hba, phy_no);
1286 goto out;
1287 }
1288 fallthrough;
1289 case PHY_FUNC_RELEASE_SPINUP_HOLD:
1290 default:
1291 ret = -EOPNOTSUPP;
1292 goto out;
1293 }
1294
1295 if (sts && !wait_for_completion_timeout(&completion,
1296 HISI_SAS_WAIT_PHYUP_TIMEOUT)) {
1297 dev_warn(dev, "phy%d wait phyup timed out for func %d\n",
1298 phy_no, func);
1299 if (phy->in_reset)
1300 ret = -ETIMEDOUT;
1301 }
1302
1303 out:
1304 phy->reset_completion = NULL;
1305
1306 up(&hisi_hba->sem);
1307 return ret;
1308 }
1309
hisi_sas_fill_ata_reset_cmd(struct ata_device * dev,bool reset,int pmp,u8 * fis)1310 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1311 bool reset, int pmp, u8 *fis)
1312 {
1313 struct ata_taskfile tf;
1314
1315 ata_tf_init(dev, &tf);
1316 if (reset)
1317 tf.ctl |= ATA_SRST;
1318 else
1319 tf.ctl &= ~ATA_SRST;
1320 tf.command = ATA_CMD_DEV_RESET;
1321 ata_tf_to_fis(&tf, pmp, 0, fis);
1322 }
1323
hisi_sas_softreset_ata_disk(struct domain_device * device)1324 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1325 {
1326 u8 fis[20] = {0};
1327 struct ata_port *ap = device->sata_dev.ap;
1328 struct ata_link *link;
1329 int rc = TMF_RESP_FUNC_FAILED;
1330 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1331 struct device *dev = hisi_hba->dev;
1332
1333 ata_for_each_link(link, ap, EDGE) {
1334 int pmp = sata_srst_pmp(link);
1335
1336 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1337 rc = sas_execute_ata_cmd(device, fis, -1);
1338 if (rc != TMF_RESP_FUNC_COMPLETE)
1339 break;
1340 }
1341
1342 if (rc == TMF_RESP_FUNC_COMPLETE) {
1343 ata_for_each_link(link, ap, EDGE) {
1344 int pmp = sata_srst_pmp(link);
1345
1346 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1347 rc = sas_execute_ata_cmd(device, fis, -1);
1348 if (rc != TMF_RESP_FUNC_COMPLETE)
1349 dev_err(dev, "ata disk %016llx de-reset failed\n",
1350 SAS_ADDR(device->sas_addr));
1351 }
1352 } else {
1353 dev_err(dev, "ata disk %016llx reset failed\n",
1354 SAS_ADDR(device->sas_addr));
1355 }
1356
1357 if (rc == TMF_RESP_FUNC_COMPLETE)
1358 hisi_sas_release_task(hisi_hba, device);
1359
1360 return rc;
1361 }
1362
hisi_sas_refresh_port_id(struct hisi_hba * hisi_hba)1363 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1364 {
1365 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1366 int i;
1367
1368 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1369 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1370 struct domain_device *device = sas_dev->sas_device;
1371 struct asd_sas_port *sas_port;
1372 struct hisi_sas_port *port;
1373 struct hisi_sas_phy *phy = NULL;
1374 struct asd_sas_phy *sas_phy;
1375
1376 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1377 || !device || !device->port)
1378 continue;
1379
1380 sas_port = device->port;
1381 port = to_hisi_sas_port(sas_port);
1382
1383 spin_lock(&sas_port->phy_list_lock);
1384 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1385 if (state & BIT(sas_phy->id)) {
1386 phy = sas_phy->lldd_phy;
1387 break;
1388 }
1389 spin_unlock(&sas_port->phy_list_lock);
1390
1391 if (phy) {
1392 port->id = phy->port_id;
1393
1394 /* Update linkrate of directly attached device. */
1395 if (!device->parent)
1396 device->linkrate = phy->sas_phy.linkrate;
1397
1398 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1399 } else if (!port->port_attached)
1400 port->id = 0xff;
1401 }
1402 }
1403
hisi_sas_rescan_topology(struct hisi_hba * hisi_hba,u32 state)1404 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1405 {
1406 struct asd_sas_port *_sas_port = NULL;
1407 int phy_no;
1408
1409 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1410 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1411 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1412 struct asd_sas_port *sas_port = sas_phy->port;
1413 bool do_port_check = _sas_port != sas_port;
1414
1415 if (!sas_phy->phy->enabled)
1416 continue;
1417
1418 /* Report PHY state change to libsas */
1419 if (state & BIT(phy_no)) {
1420 if (do_port_check && sas_port && sas_port->port_dev) {
1421 struct domain_device *dev = sas_port->port_dev;
1422
1423 _sas_port = sas_port;
1424
1425 if (dev_is_expander(dev->dev_type))
1426 sas_notify_port_event(sas_phy,
1427 PORTE_BROADCAST_RCVD,
1428 GFP_KERNEL);
1429 }
1430 } else {
1431 hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1432 }
1433 }
1434 }
1435
hisi_sas_reset_init_all_devices(struct hisi_hba * hisi_hba)1436 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1437 {
1438 struct hisi_sas_device *sas_dev;
1439 struct domain_device *device;
1440 int i;
1441
1442 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1443 sas_dev = &hisi_hba->devices[i];
1444 device = sas_dev->sas_device;
1445
1446 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1447 continue;
1448
1449 hisi_sas_init_device(device);
1450 }
1451 }
1452
hisi_sas_send_ata_reset_each_phy(struct hisi_hba * hisi_hba,struct asd_sas_port * sas_port,struct domain_device * device)1453 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1454 struct asd_sas_port *sas_port,
1455 struct domain_device *device)
1456 {
1457 struct ata_port *ap = device->sata_dev.ap;
1458 struct device *dev = hisi_hba->dev;
1459 int rc = TMF_RESP_FUNC_FAILED;
1460 struct ata_link *link;
1461 u8 fis[20] = {0};
1462 int i;
1463
1464 for (i = 0; i < hisi_hba->n_phy; i++) {
1465 if (!(sas_port->phy_mask & BIT(i)))
1466 continue;
1467
1468 ata_for_each_link(link, ap, EDGE) {
1469 int pmp = sata_srst_pmp(link);
1470
1471 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1472 rc = sas_execute_ata_cmd(device, fis, i);
1473 if (rc != TMF_RESP_FUNC_COMPLETE) {
1474 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1475 i, rc);
1476 break;
1477 }
1478 }
1479 }
1480 }
1481
hisi_sas_terminate_stp_reject(struct hisi_hba * hisi_hba)1482 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1483 {
1484 struct device *dev = hisi_hba->dev;
1485 int port_no, rc, i;
1486
1487 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1488 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1489 struct domain_device *device = sas_dev->sas_device;
1490
1491 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1492 continue;
1493
1494 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1495 if (rc < 0)
1496 dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1497 }
1498
1499 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1500 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1501 struct asd_sas_port *sas_port = &port->sas_port;
1502 struct domain_device *port_dev = sas_port->port_dev;
1503 struct domain_device *device;
1504
1505 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1506 continue;
1507
1508 /* Try to find a SATA device */
1509 list_for_each_entry(device, &sas_port->dev_list,
1510 dev_list_node) {
1511 if (dev_is_sata(device)) {
1512 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1513 sas_port,
1514 device);
1515 break;
1516 }
1517 }
1518 }
1519 }
1520
hisi_sas_controller_reset_prepare(struct hisi_hba * hisi_hba)1521 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1522 {
1523 struct Scsi_Host *shost = hisi_hba->shost;
1524
1525 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1526
1527 scsi_block_requests(shost);
1528 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1529
1530 del_timer_sync(&hisi_hba->timer);
1531
1532 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1533 }
1534 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1535
hisi_sas_async_init_wait_phyup(void * data,async_cookie_t cookie)1536 static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie)
1537 {
1538 struct hisi_sas_phy *phy = data;
1539 struct hisi_hba *hisi_hba = phy->hisi_hba;
1540 struct device *dev = hisi_hba->dev;
1541 DECLARE_COMPLETION_ONSTACK(completion);
1542 int phy_no = phy->sas_phy.id;
1543
1544 phy->reset_completion = &completion;
1545 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1546 if (!wait_for_completion_timeout(&completion,
1547 HISI_SAS_WAIT_PHYUP_TIMEOUT))
1548 dev_warn(dev, "phy%d wait phyup timed out\n", phy_no);
1549
1550 phy->reset_completion = NULL;
1551 }
1552
hisi_sas_controller_reset_done(struct hisi_hba * hisi_hba)1553 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1554 {
1555 struct Scsi_Host *shost = hisi_hba->shost;
1556 ASYNC_DOMAIN_EXCLUSIVE(async);
1557 int phy_no;
1558
1559 /* Init and wait for PHYs to come up and all libsas event finished. */
1560 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1561 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1562 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1563
1564 if (!sas_phy->phy->enabled)
1565 continue;
1566
1567 if (!(hisi_hba->phy_state & BIT(phy_no))) {
1568 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1569 continue;
1570 }
1571
1572 async_schedule_domain(hisi_sas_async_init_wait_phyup,
1573 phy, &async);
1574 }
1575
1576 async_synchronize_full_domain(&async);
1577 hisi_sas_refresh_port_id(hisi_hba);
1578 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1579
1580 if (hisi_hba->reject_stp_links_msk)
1581 hisi_sas_terminate_stp_reject(hisi_hba);
1582 hisi_sas_reset_init_all_devices(hisi_hba);
1583 scsi_unblock_requests(shost);
1584 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1585 up(&hisi_hba->sem);
1586
1587 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1588 }
1589 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1590
hisi_sas_controller_prereset(struct hisi_hba * hisi_hba)1591 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1592 {
1593 if (!hisi_hba->hw->soft_reset)
1594 return -ENOENT;
1595
1596 down(&hisi_hba->sem);
1597 if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1598 up(&hisi_hba->sem);
1599 return -EPERM;
1600 }
1601
1602 if (hisi_sas_debugfs_enable)
1603 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1604
1605 return 0;
1606 }
1607
hisi_sas_controller_reset(struct hisi_hba * hisi_hba)1608 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1609 {
1610 struct device *dev = hisi_hba->dev;
1611 struct Scsi_Host *shost = hisi_hba->shost;
1612 int rc;
1613
1614 dev_info(dev, "controller resetting...\n");
1615 hisi_sas_controller_reset_prepare(hisi_hba);
1616
1617 rc = hisi_hba->hw->soft_reset(hisi_hba);
1618 if (rc) {
1619 dev_warn(dev, "controller reset failed (%d)\n", rc);
1620 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1621 up(&hisi_hba->sem);
1622 scsi_unblock_requests(shost);
1623 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1624 return rc;
1625 }
1626 clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1627
1628 hisi_sas_controller_reset_done(hisi_hba);
1629 dev_info(dev, "controller reset complete\n");
1630
1631 return 0;
1632 }
1633
hisi_sas_abort_task(struct sas_task * task)1634 static int hisi_sas_abort_task(struct sas_task *task)
1635 {
1636 struct hisi_sas_internal_abort_data internal_abort_data = { false };
1637 struct domain_device *device = task->dev;
1638 struct hisi_sas_device *sas_dev = device->lldd_dev;
1639 struct hisi_sas_slot *slot = task->lldd_task;
1640 struct hisi_hba *hisi_hba;
1641 struct device *dev;
1642 int rc = TMF_RESP_FUNC_FAILED;
1643 unsigned long flags;
1644
1645 if (!sas_dev)
1646 return TMF_RESP_FUNC_FAILED;
1647
1648 hisi_hba = dev_to_hisi_hba(task->dev);
1649 dev = hisi_hba->dev;
1650
1651 spin_lock_irqsave(&task->task_state_lock, flags);
1652 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1653 struct hisi_sas_cq *cq;
1654
1655 if (slot) {
1656 /*
1657 * sync irq or poll queue to avoid free'ing task
1658 * before using task in IO completion
1659 */
1660 cq = &hisi_hba->cq[slot->dlvry_queue];
1661 hisi_sas_sync_cq(cq);
1662 }
1663 spin_unlock_irqrestore(&task->task_state_lock, flags);
1664 rc = TMF_RESP_FUNC_COMPLETE;
1665 goto out;
1666 }
1667 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1668 spin_unlock_irqrestore(&task->task_state_lock, flags);
1669
1670 if (!slot)
1671 goto out;
1672
1673 if (task->task_proto & SAS_PROTOCOL_SSP) {
1674 u16 tag = slot->idx;
1675 int rc2;
1676
1677 rc = sas_abort_task(task, tag);
1678 rc2 = sas_execute_internal_abort_single(device, tag,
1679 slot->dlvry_queue, &internal_abort_data);
1680 if (rc2 < 0) {
1681 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1682 return TMF_RESP_FUNC_FAILED;
1683 }
1684
1685 /*
1686 * If the TMF finds that the IO is not in the device and also
1687 * the internal abort does not succeed, then it is safe to
1688 * free the slot.
1689 * Note: if the internal abort succeeds then the slot
1690 * will have already been completed
1691 */
1692 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1693 if (task->lldd_task)
1694 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1695 }
1696 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1697 task->task_proto & SAS_PROTOCOL_STP) {
1698 if (task->dev->dev_type == SAS_SATA_DEV) {
1699 struct ata_queued_cmd *qc = task->uldd_task;
1700
1701 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1702 if (rc < 0) {
1703 dev_err(dev, "abort task: internal abort failed\n");
1704 goto out;
1705 }
1706 hisi_sas_dereg_device(hisi_hba, device);
1707
1708 /*
1709 * If an ATA internal command times out in ATA EH, it
1710 * need to execute soft reset, so check the scsicmd
1711 */
1712 if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) &&
1713 qc && qc->scsicmd) {
1714 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1715 rc = TMF_RESP_FUNC_COMPLETE;
1716 } else {
1717 rc = hisi_sas_softreset_ata_disk(device);
1718 }
1719 }
1720 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1721 /* SMP */
1722 u32 tag = slot->idx;
1723 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1724
1725 rc = sas_execute_internal_abort_single(device,
1726 tag, slot->dlvry_queue,
1727 &internal_abort_data);
1728 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1729 task->lldd_task) {
1730 /*
1731 * sync irq or poll queue to avoid free'ing task
1732 * before using task in IO completion
1733 */
1734 hisi_sas_sync_cq(cq);
1735 slot->task = NULL;
1736 }
1737 }
1738
1739 out:
1740 if (rc != TMF_RESP_FUNC_COMPLETE)
1741 dev_notice(dev, "abort task: rc=%d\n", rc);
1742 return rc;
1743 }
1744
hisi_sas_abort_task_set(struct domain_device * device,u8 * lun)1745 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1746 {
1747 struct hisi_sas_device *sas_dev = device->lldd_dev;
1748 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1749 struct device *dev = hisi_hba->dev;
1750 int rc;
1751
1752 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1753 if (rc < 0) {
1754 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1755 return TMF_RESP_FUNC_FAILED;
1756 }
1757 hisi_sas_dereg_device(hisi_hba, device);
1758
1759 rc = sas_abort_task_set(device, lun);
1760 if (rc == TMF_RESP_FUNC_COMPLETE)
1761 hisi_sas_release_task(hisi_hba, device);
1762
1763 return rc;
1764 }
1765
hisi_sas_debug_I_T_nexus_reset(struct domain_device * device)1766 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1767 {
1768 struct sas_phy *local_phy = sas_get_local_phy(device);
1769 struct hisi_sas_device *sas_dev = device->lldd_dev;
1770 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1771 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1772 int rc, reset_type;
1773
1774 if (!local_phy->enabled) {
1775 sas_put_local_phy(local_phy);
1776 return -ENODEV;
1777 }
1778
1779 if (scsi_is_sas_phy_local(local_phy)) {
1780 struct asd_sas_phy *sas_phy =
1781 sas_ha->sas_phy[local_phy->number];
1782 struct hisi_sas_phy *phy =
1783 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1784 unsigned long flags;
1785
1786 spin_lock_irqsave(&phy->lock, flags);
1787 phy->in_reset = 1;
1788 spin_unlock_irqrestore(&phy->lock, flags);
1789 }
1790
1791 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1792 !dev_is_sata(device)) ? true : false;
1793
1794 rc = sas_phy_reset(local_phy, reset_type);
1795 sas_put_local_phy(local_phy);
1796
1797 if (scsi_is_sas_phy_local(local_phy)) {
1798 struct asd_sas_phy *sas_phy =
1799 sas_ha->sas_phy[local_phy->number];
1800 struct hisi_sas_phy *phy =
1801 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1802 unsigned long flags;
1803
1804 spin_lock_irqsave(&phy->lock, flags);
1805 phy->in_reset = 0;
1806 spin_unlock_irqrestore(&phy->lock, flags);
1807
1808 /* report PHY down if timed out */
1809 if (rc == -ETIMEDOUT)
1810 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1811 return rc;
1812 }
1813
1814 /* Remote phy */
1815 if (rc)
1816 return rc;
1817
1818 if (dev_is_sata(device)) {
1819 struct ata_link *link = &device->sata_dev.ap->link;
1820
1821 rc = ata_wait_after_reset(link, jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT,
1822 smp_ata_check_ready_type);
1823 } else {
1824 msleep(2000);
1825 }
1826
1827 return rc;
1828 }
1829
hisi_sas_I_T_nexus_reset(struct domain_device * device)1830 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1831 {
1832 struct hisi_sas_device *sas_dev = device->lldd_dev;
1833 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1834 struct device *dev = hisi_hba->dev;
1835 int rc;
1836
1837 if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
1838 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1839
1840 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1841 if (rc < 0) {
1842 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1843 return TMF_RESP_FUNC_FAILED;
1844 }
1845 hisi_sas_dereg_device(hisi_hba, device);
1846
1847 if (dev_is_sata(device)) {
1848 rc = hisi_sas_softreset_ata_disk(device);
1849 if (rc == TMF_RESP_FUNC_FAILED)
1850 dev_err(dev, "ata disk %016llx reset (%d)\n",
1851 SAS_ADDR(device->sas_addr), rc);
1852 }
1853
1854 rc = hisi_sas_debug_I_T_nexus_reset(device);
1855 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1856 hisi_sas_release_task(hisi_hba, device);
1857
1858 return rc;
1859 }
1860
hisi_sas_lu_reset(struct domain_device * device,u8 * lun)1861 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1862 {
1863 struct hisi_sas_device *sas_dev = device->lldd_dev;
1864 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1865 struct device *dev = hisi_hba->dev;
1866 int rc = TMF_RESP_FUNC_FAILED;
1867
1868 /* Clear internal IO and then lu reset */
1869 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1870 if (rc < 0) {
1871 dev_err(dev, "lu_reset: internal abort failed\n");
1872 goto out;
1873 }
1874 hisi_sas_dereg_device(hisi_hba, device);
1875
1876 if (dev_is_sata(device)) {
1877 struct sas_phy *phy;
1878
1879 phy = sas_get_local_phy(device);
1880
1881 rc = sas_phy_reset(phy, true);
1882
1883 if (rc == 0)
1884 hisi_sas_release_task(hisi_hba, device);
1885 sas_put_local_phy(phy);
1886 } else {
1887 rc = sas_lu_reset(device, lun);
1888 if (rc == TMF_RESP_FUNC_COMPLETE)
1889 hisi_sas_release_task(hisi_hba, device);
1890 }
1891 out:
1892 if (rc != TMF_RESP_FUNC_COMPLETE)
1893 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1894 sas_dev->device_id, rc);
1895 return rc;
1896 }
1897
hisi_sas_async_I_T_nexus_reset(void * data,async_cookie_t cookie)1898 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1899 {
1900 struct domain_device *device = data;
1901 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1902 int rc;
1903
1904 rc = hisi_sas_debug_I_T_nexus_reset(device);
1905 if (rc != TMF_RESP_FUNC_COMPLETE)
1906 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1907 SAS_ADDR(device->sas_addr), rc);
1908 }
1909
hisi_sas_clear_nexus_ha(struct sas_ha_struct * sas_ha)1910 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1911 {
1912 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1913 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1914 ASYNC_DOMAIN_EXCLUSIVE(async);
1915 int i;
1916
1917 queue_work(hisi_hba->wq, &r.work);
1918 wait_for_completion(r.completion);
1919 if (!r.done)
1920 return TMF_RESP_FUNC_FAILED;
1921
1922 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1923 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1924 struct domain_device *device = sas_dev->sas_device;
1925
1926 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1927 dev_is_expander(device->dev_type))
1928 continue;
1929
1930 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1931 device, &async);
1932 }
1933
1934 async_synchronize_full_domain(&async);
1935 hisi_sas_release_tasks(hisi_hba);
1936
1937 return TMF_RESP_FUNC_COMPLETE;
1938 }
1939
hisi_sas_query_task(struct sas_task * task)1940 static int hisi_sas_query_task(struct sas_task *task)
1941 {
1942 int rc = TMF_RESP_FUNC_FAILED;
1943
1944 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1945 struct hisi_sas_slot *slot = task->lldd_task;
1946 u32 tag = slot->idx;
1947
1948 rc = sas_query_task(task, tag);
1949 switch (rc) {
1950 /* The task is still in Lun, release it then */
1951 case TMF_RESP_FUNC_SUCC:
1952 /* The task is not in Lun or failed, reset the phy */
1953 case TMF_RESP_FUNC_FAILED:
1954 case TMF_RESP_FUNC_COMPLETE:
1955 break;
1956 default:
1957 rc = TMF_RESP_FUNC_FAILED;
1958 break;
1959 }
1960 }
1961 return rc;
1962 }
1963
hisi_sas_internal_abort_timeout(struct sas_task * task,void * data)1964 static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
1965 void *data)
1966 {
1967 struct domain_device *device = task->dev;
1968 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1969 struct hisi_sas_internal_abort_data *timeout = data;
1970
1971 if (hisi_sas_debugfs_enable) {
1972 /*
1973 * If timeout occurs in device gone scenario, to avoid
1974 * circular dependency like:
1975 * hisi_sas_dev_gone() -> down() -> ... ->
1976 * hisi_sas_internal_abort_timeout() -> down().
1977 */
1978 if (!timeout->rst_ha_timeout)
1979 down(&hisi_hba->sem);
1980 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1981 if (!timeout->rst_ha_timeout)
1982 up(&hisi_hba->sem);
1983 }
1984
1985 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1986 pr_err("Internal abort: timeout %016llx\n",
1987 SAS_ADDR(device->sas_addr));
1988 } else {
1989 struct hisi_sas_slot *slot = task->lldd_task;
1990
1991 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1992
1993 if (slot) {
1994 struct hisi_sas_cq *cq =
1995 &hisi_hba->cq[slot->dlvry_queue];
1996 /*
1997 * sync irq or poll queue to avoid free'ing task
1998 * before using task in IO completion
1999 */
2000 hisi_sas_sync_cq(cq);
2001 slot->task = NULL;
2002 }
2003
2004 if (timeout->rst_ha_timeout) {
2005 pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n",
2006 SAS_ADDR(device->sas_addr));
2007 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2008 } else {
2009 pr_err("Internal abort: timeout and not done %016llx.\n",
2010 SAS_ADDR(device->sas_addr));
2011 }
2012
2013 return true;
2014 }
2015
2016 return false;
2017 }
2018
hisi_sas_port_formed(struct asd_sas_phy * sas_phy)2019 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2020 {
2021 hisi_sas_port_notify_formed(sas_phy);
2022 }
2023
hisi_sas_write_gpio(struct sas_ha_struct * sha,u8 reg_type,u8 reg_index,u8 reg_count,u8 * write_data)2024 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2025 u8 reg_index, u8 reg_count, u8 *write_data)
2026 {
2027 struct hisi_hba *hisi_hba = sha->lldd_ha;
2028
2029 if (!hisi_hba->hw->write_gpio)
2030 return -EOPNOTSUPP;
2031
2032 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2033 reg_index, reg_count, write_data);
2034 }
2035
hisi_sas_phy_disconnected(struct hisi_sas_phy * phy)2036 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2037 {
2038 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2039 struct sas_phy *sphy = sas_phy->phy;
2040 unsigned long flags;
2041
2042 phy->phy_attached = 0;
2043 phy->phy_type = 0;
2044 phy->port = NULL;
2045
2046 spin_lock_irqsave(&phy->lock, flags);
2047 if (phy->enable)
2048 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2049 else
2050 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2051 spin_unlock_irqrestore(&phy->lock, flags);
2052 }
2053
hisi_sas_phy_down(struct hisi_hba * hisi_hba,int phy_no,int rdy,gfp_t gfp_flags)2054 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2055 gfp_t gfp_flags)
2056 {
2057 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2058 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2059 struct device *dev = hisi_hba->dev;
2060
2061 if (rdy) {
2062 /* Phy down but ready */
2063 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2064 hisi_sas_port_notify_formed(sas_phy);
2065 } else {
2066 struct hisi_sas_port *port = phy->port;
2067
2068 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||
2069 phy->in_reset) {
2070 dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2071 return;
2072 }
2073 /* Phy down and not ready */
2074 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2075 sas_phy_disconnected(sas_phy);
2076
2077 if (port) {
2078 if (phy->phy_type & PORT_TYPE_SAS) {
2079 int port_id = port->id;
2080
2081 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2082 port_id))
2083 port->port_attached = 0;
2084 } else if (phy->phy_type & PORT_TYPE_SATA)
2085 port->port_attached = 0;
2086 }
2087 hisi_sas_phy_disconnected(phy);
2088 }
2089 }
2090 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2091
hisi_sas_phy_bcast(struct hisi_sas_phy * phy)2092 void hisi_sas_phy_bcast(struct hisi_sas_phy *phy)
2093 {
2094 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2095 struct hisi_hba *hisi_hba = phy->hisi_hba;
2096
2097 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags))
2098 return;
2099
2100 sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC);
2101 }
2102 EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast);
2103
hisi_sas_host_reset(struct Scsi_Host * shost,int reset_type)2104 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2105 {
2106 struct hisi_hba *hisi_hba = shost_priv(shost);
2107
2108 if (reset_type != SCSI_ADAPTER_RESET)
2109 return -EOPNOTSUPP;
2110
2111 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2112
2113 return 0;
2114 }
2115 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2116
2117 struct scsi_transport_template *hisi_sas_stt;
2118 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2119
2120 static struct sas_domain_function_template hisi_sas_transport_ops = {
2121 .lldd_dev_found = hisi_sas_dev_found,
2122 .lldd_dev_gone = hisi_sas_dev_gone,
2123 .lldd_execute_task = hisi_sas_queue_command,
2124 .lldd_control_phy = hisi_sas_control_phy,
2125 .lldd_abort_task = hisi_sas_abort_task,
2126 .lldd_abort_task_set = hisi_sas_abort_task_set,
2127 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
2128 .lldd_lu_reset = hisi_sas_lu_reset,
2129 .lldd_query_task = hisi_sas_query_task,
2130 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
2131 .lldd_port_formed = hisi_sas_port_formed,
2132 .lldd_write_gpio = hisi_sas_write_gpio,
2133 .lldd_tmf_aborted = hisi_sas_tmf_aborted,
2134 .lldd_abort_timeout = hisi_sas_internal_abort_timeout,
2135 };
2136
hisi_sas_init_mem(struct hisi_hba * hisi_hba)2137 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2138 {
2139 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2140 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2141
2142 for (i = 0; i < hisi_hba->queue_count; i++) {
2143 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2144 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2145 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2146
2147 s = sizeof(struct hisi_sas_cmd_hdr);
2148 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2149 memset(&cmd_hdr[j], 0, s);
2150
2151 dq->wr_point = 0;
2152
2153 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2154 memset(hisi_hba->complete_hdr[i], 0, s);
2155 cq->rd_point = 0;
2156 }
2157
2158 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2159 memset(hisi_hba->initial_fis, 0, s);
2160
2161 s = max_command_entries * sizeof(struct hisi_sas_iost);
2162 memset(hisi_hba->iost, 0, s);
2163
2164 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2165 memset(hisi_hba->breakpoint, 0, s);
2166
2167 s = sizeof(struct hisi_sas_sata_breakpoint);
2168 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2169 memset(&sata_breakpoint[j], 0, s);
2170 }
2171 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2172
hisi_sas_alloc(struct hisi_hba * hisi_hba)2173 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2174 {
2175 struct device *dev = hisi_hba->dev;
2176 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2177 int max_command_entries_ru, sz_slot_buf_ru;
2178 int blk_cnt, slots_per_blk;
2179
2180 sema_init(&hisi_hba->sem, 1);
2181 spin_lock_init(&hisi_hba->lock);
2182 for (i = 0; i < hisi_hba->n_phy; i++) {
2183 hisi_sas_phy_init(hisi_hba, i);
2184 hisi_hba->port[i].port_attached = 0;
2185 hisi_hba->port[i].id = -1;
2186 }
2187
2188 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2189 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2190 hisi_hba->devices[i].device_id = i;
2191 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2192 }
2193
2194 for (i = 0; i < hisi_hba->queue_count; i++) {
2195 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2196 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2197
2198 /* Completion queue structure */
2199 cq->id = i;
2200 cq->hisi_hba = hisi_hba;
2201 spin_lock_init(&cq->poll_lock);
2202
2203 /* Delivery queue structure */
2204 spin_lock_init(&dq->lock);
2205 INIT_LIST_HEAD(&dq->list);
2206 dq->id = i;
2207 dq->hisi_hba = hisi_hba;
2208
2209 /* Delivery queue */
2210 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2211 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2212 &hisi_hba->cmd_hdr_dma[i],
2213 GFP_KERNEL);
2214 if (!hisi_hba->cmd_hdr[i])
2215 goto err_out;
2216
2217 /* Completion queue */
2218 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2219 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2220 &hisi_hba->complete_hdr_dma[i],
2221 GFP_KERNEL);
2222 if (!hisi_hba->complete_hdr[i])
2223 goto err_out;
2224 }
2225
2226 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2227 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2228 GFP_KERNEL);
2229 if (!hisi_hba->itct)
2230 goto err_out;
2231
2232 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2233 sizeof(struct hisi_sas_slot),
2234 GFP_KERNEL);
2235 if (!hisi_hba->slot_info)
2236 goto err_out;
2237
2238 /* roundup to avoid overly large block size */
2239 max_command_entries_ru = roundup(max_command_entries, 64);
2240 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2241 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2242 else
2243 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2244 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2245 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2246 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2247 slots_per_blk = s / sz_slot_buf_ru;
2248
2249 for (i = 0; i < blk_cnt; i++) {
2250 int slot_index = i * slots_per_blk;
2251 dma_addr_t buf_dma;
2252 void *buf;
2253
2254 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2255 GFP_KERNEL);
2256 if (!buf)
2257 goto err_out;
2258
2259 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2260 struct hisi_sas_slot *slot;
2261
2262 slot = &hisi_hba->slot_info[slot_index];
2263 slot->buf = buf;
2264 slot->buf_dma = buf_dma;
2265 slot->idx = slot_index;
2266
2267 buf += sz_slot_buf_ru;
2268 buf_dma += sz_slot_buf_ru;
2269 }
2270 }
2271
2272 s = max_command_entries * sizeof(struct hisi_sas_iost);
2273 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2274 GFP_KERNEL);
2275 if (!hisi_hba->iost)
2276 goto err_out;
2277
2278 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2279 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2280 &hisi_hba->breakpoint_dma,
2281 GFP_KERNEL);
2282 if (!hisi_hba->breakpoint)
2283 goto err_out;
2284
2285 s = hisi_hba->slot_index_count = max_command_entries;
2286 hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);
2287 if (!hisi_hba->slot_index_tags)
2288 goto err_out;
2289
2290 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2291 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2292 &hisi_hba->initial_fis_dma,
2293 GFP_KERNEL);
2294 if (!hisi_hba->initial_fis)
2295 goto err_out;
2296
2297 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2298 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2299 &hisi_hba->sata_breakpoint_dma,
2300 GFP_KERNEL);
2301 if (!hisi_hba->sata_breakpoint)
2302 goto err_out;
2303
2304 hisi_hba->last_slot_index = 0;
2305
2306 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2307 if (!hisi_hba->wq) {
2308 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2309 goto err_out;
2310 }
2311
2312 return 0;
2313 err_out:
2314 return -ENOMEM;
2315 }
2316 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2317
hisi_sas_free(struct hisi_hba * hisi_hba)2318 void hisi_sas_free(struct hisi_hba *hisi_hba)
2319 {
2320 int i;
2321
2322 for (i = 0; i < hisi_hba->n_phy; i++) {
2323 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2324
2325 del_timer_sync(&phy->timer);
2326 }
2327
2328 if (hisi_hba->wq)
2329 destroy_workqueue(hisi_hba->wq);
2330 }
2331 EXPORT_SYMBOL_GPL(hisi_sas_free);
2332
hisi_sas_rst_work_handler(struct work_struct * work)2333 void hisi_sas_rst_work_handler(struct work_struct *work)
2334 {
2335 struct hisi_hba *hisi_hba =
2336 container_of(work, struct hisi_hba, rst_work);
2337
2338 if (hisi_sas_controller_prereset(hisi_hba))
2339 return;
2340
2341 hisi_sas_controller_reset(hisi_hba);
2342 }
2343 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2344
hisi_sas_sync_rst_work_handler(struct work_struct * work)2345 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2346 {
2347 struct hisi_sas_rst *rst =
2348 container_of(work, struct hisi_sas_rst, work);
2349
2350 if (hisi_sas_controller_prereset(rst->hisi_hba))
2351 goto rst_complete;
2352
2353 if (!hisi_sas_controller_reset(rst->hisi_hba))
2354 rst->done = true;
2355 rst_complete:
2356 complete(rst->completion);
2357 }
2358 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2359
hisi_sas_get_fw_info(struct hisi_hba * hisi_hba)2360 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2361 {
2362 struct device *dev = hisi_hba->dev;
2363 struct platform_device *pdev = hisi_hba->platform_dev;
2364 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2365 struct clk *refclk;
2366
2367 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2368 SAS_ADDR_SIZE)) {
2369 dev_err(dev, "could not get property sas-addr\n");
2370 return -ENOENT;
2371 }
2372
2373 if (np) {
2374 /*
2375 * These properties are only required for platform device-based
2376 * controller with DT firmware.
2377 */
2378 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2379 "hisilicon,sas-syscon");
2380 if (IS_ERR(hisi_hba->ctrl)) {
2381 dev_err(dev, "could not get syscon\n");
2382 return -ENOENT;
2383 }
2384
2385 if (device_property_read_u32(dev, "ctrl-reset-reg",
2386 &hisi_hba->ctrl_reset_reg)) {
2387 dev_err(dev, "could not get property ctrl-reset-reg\n");
2388 return -ENOENT;
2389 }
2390
2391 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2392 &hisi_hba->ctrl_reset_sts_reg)) {
2393 dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2394 return -ENOENT;
2395 }
2396
2397 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2398 &hisi_hba->ctrl_clock_ena_reg)) {
2399 dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2400 return -ENOENT;
2401 }
2402 }
2403
2404 refclk = devm_clk_get(dev, NULL);
2405 if (IS_ERR(refclk))
2406 dev_dbg(dev, "no ref clk property\n");
2407 else
2408 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2409
2410 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2411 dev_err(dev, "could not get property phy-count\n");
2412 return -ENOENT;
2413 }
2414
2415 if (device_property_read_u32(dev, "queue-count",
2416 &hisi_hba->queue_count)) {
2417 dev_err(dev, "could not get property queue-count\n");
2418 return -ENOENT;
2419 }
2420
2421 return 0;
2422 }
2423 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2424
hisi_sas_shost_alloc(struct platform_device * pdev,const struct hisi_sas_hw * hw)2425 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2426 const struct hisi_sas_hw *hw)
2427 {
2428 struct resource *res;
2429 struct Scsi_Host *shost;
2430 struct hisi_hba *hisi_hba;
2431 struct device *dev = &pdev->dev;
2432 int error;
2433
2434 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2435 if (!shost) {
2436 dev_err(dev, "scsi host alloc failed\n");
2437 return NULL;
2438 }
2439 hisi_hba = shost_priv(shost);
2440
2441 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2442 hisi_hba->hw = hw;
2443 hisi_hba->dev = dev;
2444 hisi_hba->platform_dev = pdev;
2445 hisi_hba->shost = shost;
2446 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2447
2448 timer_setup(&hisi_hba->timer, NULL, 0);
2449
2450 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2451 goto err_out;
2452
2453 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2454 if (error) {
2455 dev_err(dev, "No usable DMA addressing method\n");
2456 goto err_out;
2457 }
2458
2459 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2460 if (IS_ERR(hisi_hba->regs))
2461 goto err_out;
2462
2463 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2464 if (res) {
2465 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2466 if (IS_ERR(hisi_hba->sgpio_regs))
2467 goto err_out;
2468 }
2469
2470 if (hisi_sas_alloc(hisi_hba)) {
2471 hisi_sas_free(hisi_hba);
2472 goto err_out;
2473 }
2474
2475 return shost;
2476 err_out:
2477 scsi_host_put(shost);
2478 dev_err(dev, "shost alloc failed\n");
2479 return NULL;
2480 }
2481
hisi_sas_interrupt_preinit(struct hisi_hba * hisi_hba)2482 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2483 {
2484 if (hisi_hba->hw->interrupt_preinit)
2485 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2486 return 0;
2487 }
2488
hisi_sas_probe(struct platform_device * pdev,const struct hisi_sas_hw * hw)2489 int hisi_sas_probe(struct platform_device *pdev,
2490 const struct hisi_sas_hw *hw)
2491 {
2492 struct Scsi_Host *shost;
2493 struct hisi_hba *hisi_hba;
2494 struct device *dev = &pdev->dev;
2495 struct asd_sas_phy **arr_phy;
2496 struct asd_sas_port **arr_port;
2497 struct sas_ha_struct *sha;
2498 int rc, phy_nr, port_nr, i;
2499
2500 shost = hisi_sas_shost_alloc(pdev, hw);
2501 if (!shost)
2502 return -ENOMEM;
2503
2504 sha = SHOST_TO_SAS_HA(shost);
2505 hisi_hba = shost_priv(shost);
2506 platform_set_drvdata(pdev, sha);
2507
2508 phy_nr = port_nr = hisi_hba->n_phy;
2509
2510 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2511 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2512 if (!arr_phy || !arr_port) {
2513 rc = -ENOMEM;
2514 goto err_out_ha;
2515 }
2516
2517 sha->sas_phy = arr_phy;
2518 sha->sas_port = arr_port;
2519 sha->lldd_ha = hisi_hba;
2520
2521 shost->transportt = hisi_sas_stt;
2522 shost->max_id = HISI_SAS_MAX_DEVICES;
2523 shost->max_lun = ~0;
2524 shost->max_channel = 1;
2525 shost->max_cmd_len = 16;
2526 if (hisi_hba->hw->slot_index_alloc) {
2527 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2528 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2529 } else {
2530 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2531 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2532 }
2533
2534 sha->sas_ha_name = DRV_NAME;
2535 sha->dev = hisi_hba->dev;
2536 sha->sas_addr = &hisi_hba->sas_addr[0];
2537 sha->num_phys = hisi_hba->n_phy;
2538 sha->shost = hisi_hba->shost;
2539
2540 for (i = 0; i < hisi_hba->n_phy; i++) {
2541 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2542 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2543 }
2544
2545 rc = hisi_sas_interrupt_preinit(hisi_hba);
2546 if (rc)
2547 goto err_out_ha;
2548
2549 rc = scsi_add_host(shost, &pdev->dev);
2550 if (rc)
2551 goto err_out_ha;
2552
2553 rc = sas_register_ha(sha);
2554 if (rc)
2555 goto err_out_register_ha;
2556
2557 rc = hisi_hba->hw->hw_init(hisi_hba);
2558 if (rc)
2559 goto err_out_hw_init;
2560
2561 scsi_scan_host(shost);
2562
2563 return 0;
2564
2565 err_out_hw_init:
2566 sas_unregister_ha(sha);
2567 err_out_register_ha:
2568 scsi_remove_host(shost);
2569 err_out_ha:
2570 hisi_sas_free(hisi_hba);
2571 scsi_host_put(shost);
2572 return rc;
2573 }
2574 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2575
hisi_sas_remove(struct platform_device * pdev)2576 void hisi_sas_remove(struct platform_device *pdev)
2577 {
2578 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2579 struct hisi_hba *hisi_hba = sha->lldd_ha;
2580 struct Scsi_Host *shost = sha->shost;
2581
2582 del_timer_sync(&hisi_hba->timer);
2583
2584 sas_unregister_ha(sha);
2585 sas_remove_host(shost);
2586
2587 hisi_sas_free(hisi_hba);
2588 scsi_host_put(shost);
2589 }
2590 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2591
2592 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2593 #define DEBUGFS_ENABLE_DEFAULT "enabled"
2594 bool hisi_sas_debugfs_enable = true;
2595 u32 hisi_sas_debugfs_dump_count = 50;
2596 #else
2597 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2598 bool hisi_sas_debugfs_enable;
2599 u32 hisi_sas_debugfs_dump_count = 1;
2600 #endif
2601
2602 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2603 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2604 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2605 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2606
2607 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2608 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2609 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2610
2611 struct dentry *hisi_sas_debugfs_dir;
2612 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2613
hisi_sas_init(void)2614 static __init int hisi_sas_init(void)
2615 {
2616 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2617 if (!hisi_sas_stt)
2618 return -ENOMEM;
2619
2620 if (hisi_sas_debugfs_enable) {
2621 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2622 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2623 pr_info("hisi_sas: Limiting debugfs dump count\n");
2624 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2625 }
2626 }
2627
2628 return 0;
2629 }
2630
hisi_sas_exit(void)2631 static __exit void hisi_sas_exit(void)
2632 {
2633 sas_release_transport(hisi_sas_stt);
2634
2635 debugfs_remove(hisi_sas_debugfs_dir);
2636 }
2637
2638 module_init(hisi_sas_init);
2639 module_exit(hisi_sas_exit);
2640
2641 MODULE_LICENSE("GPL");
2642 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2643 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2644 MODULE_ALIAS("platform:" DRV_NAME);
2645