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_device_configure(struct scsi_device * sdev,struct queue_limits * lim)871 int hisi_sas_device_configure(struct scsi_device *sdev,
872 struct queue_limits *lim)
873 {
874 struct domain_device *dev = sdev_to_domain_dev(sdev);
875 int ret = sas_device_configure(sdev, lim);
876
877 if (ret)
878 return ret;
879 if (!dev_is_sata(dev))
880 sas_change_queue_depth(sdev, 64);
881
882 return 0;
883 }
884 EXPORT_SYMBOL_GPL(hisi_sas_device_configure);
885
hisi_sas_scan_start(struct Scsi_Host * shost)886 void hisi_sas_scan_start(struct Scsi_Host *shost)
887 {
888 struct hisi_hba *hisi_hba = shost_priv(shost);
889
890 hisi_hba->hw->phys_init(hisi_hba);
891 }
892 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
893
hisi_sas_scan_finished(struct Scsi_Host * shost,unsigned long time)894 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
895 {
896 struct hisi_hba *hisi_hba = shost_priv(shost);
897 struct sas_ha_struct *sha = &hisi_hba->sha;
898
899 /* Wait for PHY up interrupt to occur */
900 if (time < HZ)
901 return 0;
902
903 sas_drain_work(sha);
904 return 1;
905 }
906 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
907
hisi_sas_phyup_work_common(struct work_struct * work,enum hisi_sas_phy_event event)908 static void hisi_sas_phyup_work_common(struct work_struct *work,
909 enum hisi_sas_phy_event event)
910 {
911 struct hisi_sas_phy *phy =
912 container_of(work, typeof(*phy), works[event]);
913 struct hisi_hba *hisi_hba = phy->hisi_hba;
914 struct asd_sas_phy *sas_phy = &phy->sas_phy;
915 struct asd_sas_port *sas_port = sas_phy->port;
916 struct hisi_sas_port *port = phy->port;
917 struct device *dev = hisi_hba->dev;
918 struct domain_device *port_dev;
919 int phy_no = sas_phy->id;
920
921 if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) &&
922 sas_port && port && (port->id != phy->port_id)) {
923 dev_info(dev, "phy%d's hw port id changed from %d to %llu\n",
924 phy_no, port->id, phy->port_id);
925 port_dev = sas_port->port_dev;
926 if (port_dev && !dev_is_expander(port_dev->dev_type)) {
927 /*
928 * Set the device state to gone to block
929 * sending IO to the device.
930 */
931 set_bit(SAS_DEV_GONE, &port_dev->state);
932 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
933 return;
934 }
935 }
936
937 phy->wait_phyup_cnt = 0;
938 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
939 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
940 hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
941 }
942
hisi_sas_phyup_work(struct work_struct * work)943 static void hisi_sas_phyup_work(struct work_struct *work)
944 {
945 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);
946 }
947
hisi_sas_linkreset_work(struct work_struct * work)948 static void hisi_sas_linkreset_work(struct work_struct *work)
949 {
950 struct hisi_sas_phy *phy =
951 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
952 struct asd_sas_phy *sas_phy = &phy->sas_phy;
953
954 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
955 }
956
hisi_sas_phyup_pm_work(struct work_struct * work)957 static void hisi_sas_phyup_pm_work(struct work_struct *work)
958 {
959 struct hisi_sas_phy *phy =
960 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);
961 struct hisi_hba *hisi_hba = phy->hisi_hba;
962 struct device *dev = hisi_hba->dev;
963
964 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);
965 pm_runtime_put_sync(dev);
966 }
967
968 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
969 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
970 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
971 [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,
972 };
973
hisi_sas_notify_phy_event(struct hisi_sas_phy * phy,enum hisi_sas_phy_event event)974 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
975 enum hisi_sas_phy_event event)
976 {
977 struct hisi_hba *hisi_hba = phy->hisi_hba;
978
979 if (WARN_ON(event >= HISI_PHYES_NUM))
980 return false;
981
982 return queue_work(hisi_hba->wq, &phy->works[event]);
983 }
984 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
985
hisi_sas_wait_phyup_timedout(struct timer_list * t)986 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
987 {
988 struct hisi_sas_phy *phy = from_timer(phy, t, timer);
989 struct hisi_hba *hisi_hba = phy->hisi_hba;
990 struct device *dev = hisi_hba->dev;
991 int phy_no = phy->sas_phy.id;
992
993 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
994 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
995 }
996
997 #define HISI_SAS_WAIT_PHYUP_RETRIES 10
998
hisi_sas_phy_oob_ready(struct hisi_hba * hisi_hba,int phy_no)999 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
1000 {
1001 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1002 struct device *dev = hisi_hba->dev;
1003 unsigned long flags;
1004
1005 dev_dbg(dev, "phy%d OOB ready\n", phy_no);
1006 spin_lock_irqsave(&phy->lock, flags);
1007 if (phy->phy_attached) {
1008 spin_unlock_irqrestore(&phy->lock, flags);
1009 return;
1010 }
1011
1012 if (!timer_pending(&phy->timer)) {
1013 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
1014 phy->wait_phyup_cnt++;
1015 phy->timer.expires = jiffies +
1016 HISI_SAS_WAIT_PHYUP_TIMEOUT;
1017 add_timer(&phy->timer);
1018 spin_unlock_irqrestore(&phy->lock, flags);
1019 return;
1020 }
1021
1022 dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
1023 phy_no, phy->wait_phyup_cnt);
1024 phy->wait_phyup_cnt = 0;
1025 }
1026 spin_unlock_irqrestore(&phy->lock, flags);
1027 }
1028
1029 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
1030
hisi_sas_phy_init(struct hisi_hba * hisi_hba,int phy_no)1031 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
1032 {
1033 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1034 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1035 int i;
1036
1037 phy->hisi_hba = hisi_hba;
1038 phy->port = NULL;
1039 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
1040 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
1041 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
1042 sas_phy->iproto = SAS_PROTOCOL_ALL;
1043 sas_phy->tproto = 0;
1044 sas_phy->role = PHY_ROLE_INITIATOR;
1045 sas_phy->oob_mode = OOB_NOT_CONNECTED;
1046 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
1047 sas_phy->id = phy_no;
1048 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
1049 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
1050 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
1051 sas_phy->lldd_phy = phy;
1052
1053 for (i = 0; i < HISI_PHYES_NUM; i++)
1054 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
1055
1056 spin_lock_init(&phy->lock);
1057
1058 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
1059 }
1060
1061 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
hisi_sas_phy_enable(struct hisi_hba * hisi_hba,int phy_no,int enable)1062 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
1063 {
1064 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1065 struct asd_sas_phy *aphy = &phy->sas_phy;
1066 struct sas_phy *sphy = aphy->phy;
1067 unsigned long flags;
1068
1069 spin_lock_irqsave(&phy->lock, flags);
1070
1071 if (enable) {
1072 /* We may have been enabled already; if so, don't touch */
1073 if (!phy->enable)
1074 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
1075 hisi_hba->hw->phy_start(hisi_hba, phy_no);
1076 } else {
1077 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
1078 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1079 }
1080 phy->enable = enable;
1081 spin_unlock_irqrestore(&phy->lock, flags);
1082 }
1083 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
1084
hisi_sas_port_notify_formed(struct asd_sas_phy * sas_phy)1085 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
1086 {
1087 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1088 struct asd_sas_port *sas_port = sas_phy->port;
1089 struct hisi_sas_port *port;
1090
1091 if (!sas_port)
1092 return;
1093
1094 port = to_hisi_sas_port(sas_port);
1095 port->port_attached = 1;
1096 port->id = phy->port_id;
1097 phy->port = port;
1098 sas_port->lldd_port = port;
1099 }
1100
hisi_sas_do_release_task(struct hisi_hba * hisi_hba,struct sas_task * task,struct hisi_sas_slot * slot,bool need_lock)1101 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1102 struct hisi_sas_slot *slot, bool need_lock)
1103 {
1104 if (task) {
1105 unsigned long flags;
1106 struct task_status_struct *ts;
1107
1108 ts = &task->task_status;
1109
1110 ts->resp = SAS_TASK_COMPLETE;
1111 ts->stat = SAS_ABORTED_TASK;
1112 spin_lock_irqsave(&task->task_state_lock, flags);
1113 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1114 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1115 task->task_state_flags |= SAS_TASK_STATE_DONE;
1116 spin_unlock_irqrestore(&task->task_state_lock, flags);
1117 }
1118
1119 hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock);
1120 }
1121
hisi_sas_release_task(struct hisi_hba * hisi_hba,struct domain_device * device)1122 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1123 struct domain_device *device)
1124 {
1125 struct hisi_sas_slot *slot, *slot2;
1126 struct hisi_sas_device *sas_dev = device->lldd_dev;
1127
1128 spin_lock(&sas_dev->lock);
1129 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1130 hisi_sas_do_release_task(hisi_hba, slot->task, slot, false);
1131
1132 spin_unlock(&sas_dev->lock);
1133 }
1134
hisi_sas_release_tasks(struct hisi_hba * hisi_hba)1135 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1136 {
1137 struct hisi_sas_device *sas_dev;
1138 struct domain_device *device;
1139 int i;
1140
1141 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1142 sas_dev = &hisi_hba->devices[i];
1143 device = sas_dev->sas_device;
1144
1145 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1146 !device)
1147 continue;
1148
1149 hisi_sas_release_task(hisi_hba, device);
1150 }
1151 }
1152 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1153
hisi_sas_dereg_device(struct hisi_hba * hisi_hba,struct domain_device * device)1154 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1155 struct domain_device *device)
1156 {
1157 if (hisi_hba->hw->dereg_device)
1158 hisi_hba->hw->dereg_device(hisi_hba, device);
1159 }
1160
1161 static int
hisi_sas_internal_task_abort_dev(struct hisi_sas_device * sas_dev,bool rst_ha_timeout)1162 hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev,
1163 bool rst_ha_timeout)
1164 {
1165 struct hisi_sas_internal_abort_data data = { rst_ha_timeout };
1166 struct domain_device *device = sas_dev->sas_device;
1167 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1168 int i, rc;
1169
1170 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
1171 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1172 const struct cpumask *mask = cq->irq_mask;
1173
1174 if (mask && !cpumask_intersects(cpu_online_mask, mask))
1175 continue;
1176 rc = sas_execute_internal_abort_dev(device, i, &data);
1177 if (rc)
1178 return rc;
1179 }
1180
1181 return 0;
1182 }
1183
hisi_sas_dev_gone(struct domain_device * device)1184 static void hisi_sas_dev_gone(struct domain_device *device)
1185 {
1186 struct hisi_sas_device *sas_dev = device->lldd_dev;
1187 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1188 struct device *dev = hisi_hba->dev;
1189 int ret = 0;
1190
1191 dev_info(dev, "dev[%d:%x] is gone\n",
1192 sas_dev->device_id, sas_dev->dev_type);
1193
1194 down(&hisi_hba->sem);
1195 if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1196 hisi_sas_internal_task_abort_dev(sas_dev, true);
1197
1198 hisi_sas_dereg_device(hisi_hba, device);
1199
1200 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1201 device->lldd_dev = NULL;
1202 }
1203
1204 if (hisi_hba->hw->free_device)
1205 hisi_hba->hw->free_device(sas_dev);
1206
1207 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1208 if (!ret)
1209 sas_dev->dev_type = SAS_PHY_UNUSED;
1210 sas_dev->sas_device = NULL;
1211 up(&hisi_hba->sem);
1212 }
1213
hisi_sas_phy_set_linkrate(struct hisi_hba * hisi_hba,int phy_no,struct sas_phy_linkrates * r)1214 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1215 struct sas_phy_linkrates *r)
1216 {
1217 struct sas_phy_linkrates _r;
1218
1219 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1220 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1221 enum sas_linkrate min, max;
1222
1223 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1224 return -EINVAL;
1225
1226 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1227 max = sas_phy->phy->maximum_linkrate;
1228 min = r->minimum_linkrate;
1229 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1230 max = r->maximum_linkrate;
1231 min = sas_phy->phy->minimum_linkrate;
1232 } else
1233 return -EINVAL;
1234
1235 _r.maximum_linkrate = max;
1236 _r.minimum_linkrate = min;
1237
1238 sas_phy->phy->maximum_linkrate = max;
1239 sas_phy->phy->minimum_linkrate = min;
1240
1241 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1242 msleep(100);
1243 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1244 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1245
1246 return 0;
1247 }
1248
hisi_sas_control_phy(struct asd_sas_phy * sas_phy,enum phy_func func,void * funcdata)1249 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1250 void *funcdata)
1251 {
1252 struct hisi_sas_phy *phy = container_of(sas_phy,
1253 struct hisi_sas_phy, sas_phy);
1254 struct sas_ha_struct *sas_ha = sas_phy->ha;
1255 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1256 struct device *dev = hisi_hba->dev;
1257 DECLARE_COMPLETION_ONSTACK(completion);
1258 int phy_no = sas_phy->id;
1259 u8 sts = phy->phy_attached;
1260 int ret = 0;
1261
1262 down(&hisi_hba->sem);
1263 phy->reset_completion = &completion;
1264
1265 switch (func) {
1266 case PHY_FUNC_HARD_RESET:
1267 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1268 break;
1269
1270 case PHY_FUNC_LINK_RESET:
1271 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1272 msleep(100);
1273 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1274 break;
1275
1276 case PHY_FUNC_DISABLE:
1277 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1278 goto out;
1279
1280 case PHY_FUNC_SET_LINK_RATE:
1281 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1282 break;
1283
1284 case PHY_FUNC_GET_EVENTS:
1285 if (hisi_hba->hw->get_events) {
1286 hisi_hba->hw->get_events(hisi_hba, phy_no);
1287 goto out;
1288 }
1289 fallthrough;
1290 case PHY_FUNC_RELEASE_SPINUP_HOLD:
1291 default:
1292 ret = -EOPNOTSUPP;
1293 goto out;
1294 }
1295
1296 if (sts && !wait_for_completion_timeout(&completion,
1297 HISI_SAS_WAIT_PHYUP_TIMEOUT)) {
1298 dev_warn(dev, "phy%d wait phyup timed out for func %d\n",
1299 phy_no, func);
1300 if (phy->in_reset)
1301 ret = -ETIMEDOUT;
1302 }
1303
1304 out:
1305 phy->reset_completion = NULL;
1306
1307 up(&hisi_hba->sem);
1308 return ret;
1309 }
1310
hisi_sas_fill_ata_reset_cmd(struct ata_device * dev,bool reset,int pmp,u8 * fis)1311 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1312 bool reset, int pmp, u8 *fis)
1313 {
1314 struct ata_taskfile tf;
1315
1316 ata_tf_init(dev, &tf);
1317 if (reset)
1318 tf.ctl |= ATA_SRST;
1319 else
1320 tf.ctl &= ~ATA_SRST;
1321 tf.command = ATA_CMD_DEV_RESET;
1322 ata_tf_to_fis(&tf, pmp, 0, fis);
1323 }
1324
hisi_sas_softreset_ata_disk(struct domain_device * device)1325 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1326 {
1327 u8 fis[20] = {0};
1328 struct ata_port *ap = device->sata_dev.ap;
1329 struct ata_link *link;
1330 int rc = TMF_RESP_FUNC_FAILED;
1331 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1332 struct device *dev = hisi_hba->dev;
1333
1334 ata_for_each_link(link, ap, EDGE) {
1335 int pmp = sata_srst_pmp(link);
1336
1337 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1338 rc = sas_execute_ata_cmd(device, fis, -1);
1339 if (rc != TMF_RESP_FUNC_COMPLETE)
1340 break;
1341 }
1342
1343 if (rc == TMF_RESP_FUNC_COMPLETE) {
1344 ata_for_each_link(link, ap, EDGE) {
1345 int pmp = sata_srst_pmp(link);
1346
1347 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1348 rc = sas_execute_ata_cmd(device, fis, -1);
1349 if (rc != TMF_RESP_FUNC_COMPLETE)
1350 dev_err(dev, "ata disk %016llx de-reset failed\n",
1351 SAS_ADDR(device->sas_addr));
1352 }
1353 } else {
1354 dev_err(dev, "ata disk %016llx reset failed\n",
1355 SAS_ADDR(device->sas_addr));
1356 }
1357
1358 if (rc == TMF_RESP_FUNC_COMPLETE)
1359 hisi_sas_release_task(hisi_hba, device);
1360
1361 return rc;
1362 }
1363
hisi_sas_refresh_port_id(struct hisi_hba * hisi_hba)1364 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1365 {
1366 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1367 int i;
1368
1369 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1370 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1371 struct domain_device *device = sas_dev->sas_device;
1372 struct asd_sas_port *sas_port;
1373 struct hisi_sas_port *port;
1374 struct hisi_sas_phy *phy = NULL;
1375 struct asd_sas_phy *sas_phy;
1376
1377 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1378 || !device || !device->port)
1379 continue;
1380
1381 sas_port = device->port;
1382 port = to_hisi_sas_port(sas_port);
1383
1384 spin_lock(&sas_port->phy_list_lock);
1385 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1386 if (state & BIT(sas_phy->id)) {
1387 phy = sas_phy->lldd_phy;
1388 break;
1389 }
1390 spin_unlock(&sas_port->phy_list_lock);
1391
1392 if (phy) {
1393 port->id = phy->port_id;
1394
1395 /* Update linkrate of directly attached device. */
1396 if (!device->parent)
1397 device->linkrate = phy->sas_phy.linkrate;
1398
1399 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1400 } else if (!port->port_attached)
1401 port->id = 0xff;
1402 }
1403 }
1404
hisi_sas_rescan_topology(struct hisi_hba * hisi_hba,u32 state)1405 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1406 {
1407 struct asd_sas_port *_sas_port = NULL;
1408 int phy_no;
1409
1410 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1411 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1412 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1413 struct asd_sas_port *sas_port = sas_phy->port;
1414 bool do_port_check = _sas_port != sas_port;
1415
1416 if (!sas_phy->phy->enabled)
1417 continue;
1418
1419 /* Report PHY state change to libsas */
1420 if (state & BIT(phy_no)) {
1421 if (do_port_check && sas_port && sas_port->port_dev) {
1422 struct domain_device *dev = sas_port->port_dev;
1423
1424 _sas_port = sas_port;
1425
1426 if (dev_is_expander(dev->dev_type))
1427 sas_notify_port_event(sas_phy,
1428 PORTE_BROADCAST_RCVD,
1429 GFP_KERNEL);
1430 }
1431 } else {
1432 hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1433 }
1434 }
1435 }
1436
hisi_sas_reset_init_all_devices(struct hisi_hba * hisi_hba)1437 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1438 {
1439 struct hisi_sas_device *sas_dev;
1440 struct domain_device *device;
1441 int i;
1442
1443 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1444 sas_dev = &hisi_hba->devices[i];
1445 device = sas_dev->sas_device;
1446
1447 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1448 continue;
1449
1450 hisi_sas_init_device(device);
1451 }
1452 }
1453
hisi_sas_send_ata_reset_each_phy(struct hisi_hba * hisi_hba,struct asd_sas_port * sas_port,struct domain_device * device)1454 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1455 struct asd_sas_port *sas_port,
1456 struct domain_device *device)
1457 {
1458 struct ata_port *ap = device->sata_dev.ap;
1459 struct device *dev = hisi_hba->dev;
1460 int rc = TMF_RESP_FUNC_FAILED;
1461 struct ata_link *link;
1462 u8 fis[20] = {0};
1463 int i;
1464
1465 for (i = 0; i < hisi_hba->n_phy; i++) {
1466 if (!(sas_port->phy_mask & BIT(i)))
1467 continue;
1468
1469 ata_for_each_link(link, ap, EDGE) {
1470 int pmp = sata_srst_pmp(link);
1471
1472 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1473 rc = sas_execute_ata_cmd(device, fis, i);
1474 if (rc != TMF_RESP_FUNC_COMPLETE) {
1475 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1476 i, rc);
1477 break;
1478 }
1479 }
1480 }
1481 }
1482
hisi_sas_terminate_stp_reject(struct hisi_hba * hisi_hba)1483 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1484 {
1485 struct device *dev = hisi_hba->dev;
1486 int port_no, rc, i;
1487
1488 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1489 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1490 struct domain_device *device = sas_dev->sas_device;
1491
1492 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1493 continue;
1494
1495 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1496 if (rc < 0)
1497 dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1498 }
1499
1500 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1501 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1502 struct asd_sas_port *sas_port = &port->sas_port;
1503 struct domain_device *port_dev = sas_port->port_dev;
1504 struct domain_device *device;
1505
1506 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1507 continue;
1508
1509 /* Try to find a SATA device */
1510 list_for_each_entry(device, &sas_port->dev_list,
1511 dev_list_node) {
1512 if (dev_is_sata(device)) {
1513 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1514 sas_port,
1515 device);
1516 break;
1517 }
1518 }
1519 }
1520 }
1521
hisi_sas_controller_reset_prepare(struct hisi_hba * hisi_hba)1522 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1523 {
1524 struct Scsi_Host *shost = hisi_hba->shost;
1525
1526 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1527
1528 scsi_block_requests(shost);
1529 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1530
1531 /*
1532 * hisi_hba->timer is only used for v1/v2 hw, and check hw->sht
1533 * which is also only used for v1/v2 hw to skip it for v3 hw
1534 */
1535 if (hisi_hba->hw->sht)
1536 del_timer_sync(&hisi_hba->timer);
1537
1538 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1539 }
1540 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1541
hisi_sas_async_init_wait_phyup(void * data,async_cookie_t cookie)1542 static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie)
1543 {
1544 struct hisi_sas_phy *phy = data;
1545 struct hisi_hba *hisi_hba = phy->hisi_hba;
1546 struct device *dev = hisi_hba->dev;
1547 DECLARE_COMPLETION_ONSTACK(completion);
1548 int phy_no = phy->sas_phy.id;
1549
1550 phy->reset_completion = &completion;
1551 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1552 if (!wait_for_completion_timeout(&completion,
1553 HISI_SAS_WAIT_PHYUP_TIMEOUT))
1554 dev_warn(dev, "phy%d wait phyup timed out\n", phy_no);
1555
1556 phy->reset_completion = NULL;
1557 }
1558
hisi_sas_controller_reset_done(struct hisi_hba * hisi_hba)1559 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1560 {
1561 struct Scsi_Host *shost = hisi_hba->shost;
1562 ASYNC_DOMAIN_EXCLUSIVE(async);
1563 int phy_no;
1564
1565 /* Init and wait for PHYs to come up and all libsas event finished. */
1566 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1567 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1568 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1569
1570 if (!sas_phy->phy->enabled)
1571 continue;
1572
1573 if (!(hisi_hba->phy_state & BIT(phy_no))) {
1574 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1575 continue;
1576 }
1577
1578 async_schedule_domain(hisi_sas_async_init_wait_phyup,
1579 phy, &async);
1580 }
1581
1582 async_synchronize_full_domain(&async);
1583 hisi_sas_refresh_port_id(hisi_hba);
1584 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1585
1586 if (hisi_hba->reject_stp_links_msk)
1587 hisi_sas_terminate_stp_reject(hisi_hba);
1588 hisi_sas_reset_init_all_devices(hisi_hba);
1589 scsi_unblock_requests(shost);
1590 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1591 up(&hisi_hba->sem);
1592
1593 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1594 }
1595 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1596
hisi_sas_controller_prereset(struct hisi_hba * hisi_hba)1597 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1598 {
1599 if (!hisi_hba->hw->soft_reset)
1600 return -ENOENT;
1601
1602 down(&hisi_hba->sem);
1603 if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1604 up(&hisi_hba->sem);
1605 return -EPERM;
1606 }
1607
1608 if (hisi_sas_debugfs_enable)
1609 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1610
1611 return 0;
1612 }
1613
hisi_sas_controller_reset(struct hisi_hba * hisi_hba)1614 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1615 {
1616 struct device *dev = hisi_hba->dev;
1617 struct Scsi_Host *shost = hisi_hba->shost;
1618 int rc;
1619
1620 dev_info(dev, "controller resetting...\n");
1621 hisi_sas_controller_reset_prepare(hisi_hba);
1622
1623 rc = hisi_hba->hw->soft_reset(hisi_hba);
1624 if (rc) {
1625 dev_warn(dev, "controller reset failed (%d)\n", rc);
1626 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1627 up(&hisi_hba->sem);
1628 scsi_unblock_requests(shost);
1629 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1630 return rc;
1631 }
1632 clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1633
1634 hisi_sas_controller_reset_done(hisi_hba);
1635 dev_info(dev, "controller reset complete\n");
1636
1637 return 0;
1638 }
1639
hisi_sas_abort_task(struct sas_task * task)1640 static int hisi_sas_abort_task(struct sas_task *task)
1641 {
1642 struct hisi_sas_internal_abort_data internal_abort_data = { false };
1643 struct domain_device *device = task->dev;
1644 struct hisi_sas_device *sas_dev = device->lldd_dev;
1645 struct hisi_sas_slot *slot = task->lldd_task;
1646 struct hisi_hba *hisi_hba;
1647 struct device *dev;
1648 int rc = TMF_RESP_FUNC_FAILED;
1649 unsigned long flags;
1650
1651 if (!sas_dev)
1652 return TMF_RESP_FUNC_FAILED;
1653
1654 hisi_hba = dev_to_hisi_hba(task->dev);
1655 dev = hisi_hba->dev;
1656
1657 spin_lock_irqsave(&task->task_state_lock, flags);
1658 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1659 struct hisi_sas_cq *cq;
1660
1661 if (slot) {
1662 /*
1663 * sync irq or poll queue to avoid free'ing task
1664 * before using task in IO completion
1665 */
1666 cq = &hisi_hba->cq[slot->dlvry_queue];
1667 hisi_sas_sync_cq(cq);
1668 }
1669 spin_unlock_irqrestore(&task->task_state_lock, flags);
1670 rc = TMF_RESP_FUNC_COMPLETE;
1671 goto out;
1672 }
1673 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1674 spin_unlock_irqrestore(&task->task_state_lock, flags);
1675
1676 if (!slot)
1677 goto out;
1678
1679 if (task->task_proto & SAS_PROTOCOL_SSP) {
1680 u16 tag = slot->idx;
1681 int rc2;
1682
1683 rc = sas_abort_task(task, tag);
1684 rc2 = sas_execute_internal_abort_single(device, tag,
1685 slot->dlvry_queue, &internal_abort_data);
1686 if (rc2 < 0) {
1687 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1688 return TMF_RESP_FUNC_FAILED;
1689 }
1690
1691 /*
1692 * If the TMF finds that the IO is not in the device and also
1693 * the internal abort does not succeed, then it is safe to
1694 * free the slot.
1695 * Note: if the internal abort succeeds then the slot
1696 * will have already been completed
1697 */
1698 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1699 if (task->lldd_task)
1700 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1701 }
1702 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1703 task->task_proto & SAS_PROTOCOL_STP) {
1704 if (task->dev->dev_type == SAS_SATA_DEV) {
1705 struct ata_queued_cmd *qc = task->uldd_task;
1706
1707 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1708 if (rc < 0) {
1709 dev_err(dev, "abort task: internal abort failed\n");
1710 goto out;
1711 }
1712 hisi_sas_dereg_device(hisi_hba, device);
1713
1714 /*
1715 * If an ATA internal command times out in ATA EH, it
1716 * need to execute soft reset, so check the scsicmd
1717 */
1718 if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) &&
1719 qc && qc->scsicmd) {
1720 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1721 rc = TMF_RESP_FUNC_COMPLETE;
1722 } else {
1723 rc = hisi_sas_softreset_ata_disk(device);
1724 }
1725 }
1726 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1727 /* SMP */
1728 u32 tag = slot->idx;
1729 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1730
1731 rc = sas_execute_internal_abort_single(device,
1732 tag, slot->dlvry_queue,
1733 &internal_abort_data);
1734 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1735 task->lldd_task) {
1736 /*
1737 * sync irq or poll queue to avoid free'ing task
1738 * before using task in IO completion
1739 */
1740 hisi_sas_sync_cq(cq);
1741 slot->task = NULL;
1742 }
1743 }
1744
1745 out:
1746 if (rc != TMF_RESP_FUNC_COMPLETE)
1747 dev_notice(dev, "abort task: rc=%d\n", rc);
1748 return rc;
1749 }
1750
hisi_sas_abort_task_set(struct domain_device * device,u8 * lun)1751 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1752 {
1753 struct hisi_sas_device *sas_dev = device->lldd_dev;
1754 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1755 struct device *dev = hisi_hba->dev;
1756 int rc;
1757
1758 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1759 if (rc < 0) {
1760 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1761 return TMF_RESP_FUNC_FAILED;
1762 }
1763 hisi_sas_dereg_device(hisi_hba, device);
1764
1765 rc = sas_abort_task_set(device, lun);
1766 if (rc == TMF_RESP_FUNC_COMPLETE)
1767 hisi_sas_release_task(hisi_hba, device);
1768
1769 return rc;
1770 }
1771
hisi_sas_debug_I_T_nexus_reset(struct domain_device * device)1772 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1773 {
1774 struct sas_phy *local_phy = sas_get_local_phy(device);
1775 struct hisi_sas_device *sas_dev = device->lldd_dev;
1776 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1777 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1778 int rc, reset_type;
1779
1780 if (!local_phy->enabled) {
1781 sas_put_local_phy(local_phy);
1782 return -ENODEV;
1783 }
1784
1785 if (scsi_is_sas_phy_local(local_phy)) {
1786 struct asd_sas_phy *sas_phy =
1787 sas_ha->sas_phy[local_phy->number];
1788 struct hisi_sas_phy *phy =
1789 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1790 unsigned long flags;
1791
1792 spin_lock_irqsave(&phy->lock, flags);
1793 phy->in_reset = 1;
1794 spin_unlock_irqrestore(&phy->lock, flags);
1795 }
1796
1797 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1798 !dev_is_sata(device)) ? true : false;
1799
1800 rc = sas_phy_reset(local_phy, reset_type);
1801 sas_put_local_phy(local_phy);
1802
1803 if (scsi_is_sas_phy_local(local_phy)) {
1804 struct asd_sas_phy *sas_phy =
1805 sas_ha->sas_phy[local_phy->number];
1806 struct hisi_sas_phy *phy =
1807 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1808 unsigned long flags;
1809
1810 spin_lock_irqsave(&phy->lock, flags);
1811 phy->in_reset = 0;
1812 spin_unlock_irqrestore(&phy->lock, flags);
1813
1814 /* report PHY down if timed out */
1815 if (rc == -ETIMEDOUT)
1816 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1817 return rc;
1818 }
1819
1820 /* Remote phy */
1821 if (rc)
1822 return rc;
1823
1824 if (dev_is_sata(device)) {
1825 struct ata_link *link = &device->sata_dev.ap->link;
1826
1827 rc = ata_wait_after_reset(link, jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT,
1828 smp_ata_check_ready_type);
1829 } else {
1830 msleep(2000);
1831 }
1832
1833 return rc;
1834 }
1835
hisi_sas_I_T_nexus_reset(struct domain_device * device)1836 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1837 {
1838 struct hisi_sas_device *sas_dev = device->lldd_dev;
1839 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1840 struct device *dev = hisi_hba->dev;
1841 int rc;
1842
1843 if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
1844 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1845
1846 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1847 if (rc < 0) {
1848 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1849 return TMF_RESP_FUNC_FAILED;
1850 }
1851 hisi_sas_dereg_device(hisi_hba, device);
1852
1853 if (dev_is_sata(device)) {
1854 rc = hisi_sas_softreset_ata_disk(device);
1855 if (rc == TMF_RESP_FUNC_FAILED)
1856 dev_err(dev, "ata disk %016llx reset (%d)\n",
1857 SAS_ADDR(device->sas_addr), rc);
1858 }
1859
1860 rc = hisi_sas_debug_I_T_nexus_reset(device);
1861 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1862 hisi_sas_release_task(hisi_hba, device);
1863
1864 return rc;
1865 }
1866
hisi_sas_lu_reset(struct domain_device * device,u8 * lun)1867 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1868 {
1869 struct hisi_sas_device *sas_dev = device->lldd_dev;
1870 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1871 struct device *dev = hisi_hba->dev;
1872 int rc = TMF_RESP_FUNC_FAILED;
1873
1874 /* Clear internal IO and then lu reset */
1875 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1876 if (rc < 0) {
1877 dev_err(dev, "lu_reset: internal abort failed\n");
1878 goto out;
1879 }
1880 hisi_sas_dereg_device(hisi_hba, device);
1881
1882 if (dev_is_sata(device)) {
1883 struct sas_phy *phy;
1884
1885 phy = sas_get_local_phy(device);
1886
1887 rc = sas_phy_reset(phy, true);
1888
1889 if (rc == 0)
1890 hisi_sas_release_task(hisi_hba, device);
1891 sas_put_local_phy(phy);
1892 } else {
1893 rc = sas_lu_reset(device, lun);
1894 if (rc == TMF_RESP_FUNC_COMPLETE)
1895 hisi_sas_release_task(hisi_hba, device);
1896 }
1897 out:
1898 if (rc != TMF_RESP_FUNC_COMPLETE)
1899 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1900 sas_dev->device_id, rc);
1901 return rc;
1902 }
1903
hisi_sas_async_I_T_nexus_reset(void * data,async_cookie_t cookie)1904 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1905 {
1906 struct domain_device *device = data;
1907 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1908 int rc;
1909
1910 rc = hisi_sas_debug_I_T_nexus_reset(device);
1911 if (rc != TMF_RESP_FUNC_COMPLETE)
1912 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1913 SAS_ADDR(device->sas_addr), rc);
1914 }
1915
hisi_sas_clear_nexus_ha(struct sas_ha_struct * sas_ha)1916 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1917 {
1918 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1919 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1920 ASYNC_DOMAIN_EXCLUSIVE(async);
1921 int i;
1922
1923 queue_work(hisi_hba->wq, &r.work);
1924 wait_for_completion(r.completion);
1925 if (!r.done)
1926 return TMF_RESP_FUNC_FAILED;
1927
1928 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1929 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1930 struct domain_device *device = sas_dev->sas_device;
1931
1932 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1933 dev_is_expander(device->dev_type))
1934 continue;
1935
1936 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1937 device, &async);
1938 }
1939
1940 async_synchronize_full_domain(&async);
1941 hisi_sas_release_tasks(hisi_hba);
1942
1943 return TMF_RESP_FUNC_COMPLETE;
1944 }
1945
hisi_sas_query_task(struct sas_task * task)1946 static int hisi_sas_query_task(struct sas_task *task)
1947 {
1948 int rc = TMF_RESP_FUNC_FAILED;
1949
1950 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1951 struct hisi_sas_slot *slot = task->lldd_task;
1952 u32 tag = slot->idx;
1953
1954 rc = sas_query_task(task, tag);
1955 switch (rc) {
1956 /* The task is still in Lun, release it then */
1957 case TMF_RESP_FUNC_SUCC:
1958 /* The task is not in Lun or failed, reset the phy */
1959 case TMF_RESP_FUNC_FAILED:
1960 case TMF_RESP_FUNC_COMPLETE:
1961 break;
1962 default:
1963 rc = TMF_RESP_FUNC_FAILED;
1964 break;
1965 }
1966 }
1967 return rc;
1968 }
1969
hisi_sas_internal_abort_timeout(struct sas_task * task,void * data)1970 static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
1971 void *data)
1972 {
1973 struct domain_device *device = task->dev;
1974 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1975 struct hisi_sas_internal_abort_data *timeout = data;
1976
1977 if (hisi_sas_debugfs_enable) {
1978 /*
1979 * If timeout occurs in device gone scenario, to avoid
1980 * circular dependency like:
1981 * hisi_sas_dev_gone() -> down() -> ... ->
1982 * hisi_sas_internal_abort_timeout() -> down().
1983 */
1984 if (!timeout->rst_ha_timeout)
1985 down(&hisi_hba->sem);
1986 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1987 if (!timeout->rst_ha_timeout)
1988 up(&hisi_hba->sem);
1989 }
1990
1991 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1992 pr_err("Internal abort: timeout %016llx\n",
1993 SAS_ADDR(device->sas_addr));
1994 } else {
1995 struct hisi_sas_slot *slot = task->lldd_task;
1996
1997 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1998
1999 if (slot) {
2000 struct hisi_sas_cq *cq =
2001 &hisi_hba->cq[slot->dlvry_queue];
2002 /*
2003 * sync irq or poll queue to avoid free'ing task
2004 * before using task in IO completion
2005 */
2006 hisi_sas_sync_cq(cq);
2007 slot->task = NULL;
2008 }
2009
2010 if (timeout->rst_ha_timeout) {
2011 pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n",
2012 SAS_ADDR(device->sas_addr));
2013 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2014 } else {
2015 pr_err("Internal abort: timeout and not done %016llx.\n",
2016 SAS_ADDR(device->sas_addr));
2017 }
2018
2019 return true;
2020 }
2021
2022 return false;
2023 }
2024
hisi_sas_port_formed(struct asd_sas_phy * sas_phy)2025 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2026 {
2027 hisi_sas_port_notify_formed(sas_phy);
2028 }
2029
hisi_sas_write_gpio(struct sas_ha_struct * sha,u8 reg_type,u8 reg_index,u8 reg_count,u8 * write_data)2030 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2031 u8 reg_index, u8 reg_count, u8 *write_data)
2032 {
2033 struct hisi_hba *hisi_hba = sha->lldd_ha;
2034
2035 if (!hisi_hba->hw->write_gpio)
2036 return -EOPNOTSUPP;
2037
2038 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2039 reg_index, reg_count, write_data);
2040 }
2041
hisi_sas_phy_disconnected(struct hisi_sas_phy * phy)2042 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2043 {
2044 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2045 struct sas_phy *sphy = sas_phy->phy;
2046 unsigned long flags;
2047
2048 phy->phy_attached = 0;
2049 phy->phy_type = 0;
2050 phy->port = NULL;
2051
2052 spin_lock_irqsave(&phy->lock, flags);
2053 if (phy->enable)
2054 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2055 else
2056 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2057 spin_unlock_irqrestore(&phy->lock, flags);
2058 }
2059
hisi_sas_phy_down(struct hisi_hba * hisi_hba,int phy_no,int rdy,gfp_t gfp_flags)2060 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2061 gfp_t gfp_flags)
2062 {
2063 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2064 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2065 struct device *dev = hisi_hba->dev;
2066
2067 if (rdy) {
2068 /* Phy down but ready */
2069 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2070 hisi_sas_port_notify_formed(sas_phy);
2071 } else {
2072 struct hisi_sas_port *port = phy->port;
2073
2074 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||
2075 phy->in_reset) {
2076 dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2077 return;
2078 }
2079 /* Phy down and not ready */
2080 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2081 sas_phy_disconnected(sas_phy);
2082
2083 if (port) {
2084 if (phy->phy_type & PORT_TYPE_SAS) {
2085 int port_id = port->id;
2086
2087 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2088 port_id))
2089 port->port_attached = 0;
2090 } else if (phy->phy_type & PORT_TYPE_SATA)
2091 port->port_attached = 0;
2092 }
2093 hisi_sas_phy_disconnected(phy);
2094 }
2095 }
2096 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2097
hisi_sas_phy_bcast(struct hisi_sas_phy * phy)2098 void hisi_sas_phy_bcast(struct hisi_sas_phy *phy)
2099 {
2100 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2101 struct hisi_hba *hisi_hba = phy->hisi_hba;
2102
2103 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags))
2104 return;
2105
2106 sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC);
2107 }
2108 EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast);
2109
hisi_sas_host_reset(struct Scsi_Host * shost,int reset_type)2110 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2111 {
2112 struct hisi_hba *hisi_hba = shost_priv(shost);
2113
2114 if (reset_type != SCSI_ADAPTER_RESET)
2115 return -EOPNOTSUPP;
2116
2117 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2118
2119 return 0;
2120 }
2121 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2122
2123 struct scsi_transport_template *hisi_sas_stt;
2124 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2125
2126 static struct sas_domain_function_template hisi_sas_transport_ops = {
2127 .lldd_dev_found = hisi_sas_dev_found,
2128 .lldd_dev_gone = hisi_sas_dev_gone,
2129 .lldd_execute_task = hisi_sas_queue_command,
2130 .lldd_control_phy = hisi_sas_control_phy,
2131 .lldd_abort_task = hisi_sas_abort_task,
2132 .lldd_abort_task_set = hisi_sas_abort_task_set,
2133 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
2134 .lldd_lu_reset = hisi_sas_lu_reset,
2135 .lldd_query_task = hisi_sas_query_task,
2136 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
2137 .lldd_port_formed = hisi_sas_port_formed,
2138 .lldd_write_gpio = hisi_sas_write_gpio,
2139 .lldd_tmf_aborted = hisi_sas_tmf_aborted,
2140 .lldd_abort_timeout = hisi_sas_internal_abort_timeout,
2141 };
2142
hisi_sas_init_mem(struct hisi_hba * hisi_hba)2143 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2144 {
2145 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2146 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2147
2148 for (i = 0; i < hisi_hba->queue_count; i++) {
2149 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2150 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2151 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2152
2153 s = sizeof(struct hisi_sas_cmd_hdr);
2154 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2155 memset(&cmd_hdr[j], 0, s);
2156
2157 dq->wr_point = 0;
2158
2159 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2160 memset(hisi_hba->complete_hdr[i], 0, s);
2161 cq->rd_point = 0;
2162 }
2163
2164 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2165 memset(hisi_hba->initial_fis, 0, s);
2166
2167 s = max_command_entries * sizeof(struct hisi_sas_iost);
2168 memset(hisi_hba->iost, 0, s);
2169
2170 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2171 memset(hisi_hba->breakpoint, 0, s);
2172
2173 s = sizeof(struct hisi_sas_sata_breakpoint);
2174 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2175 memset(&sata_breakpoint[j], 0, s);
2176 }
2177 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2178
hisi_sas_alloc(struct hisi_hba * hisi_hba)2179 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2180 {
2181 struct device *dev = hisi_hba->dev;
2182 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2183 int max_command_entries_ru, sz_slot_buf_ru;
2184 int blk_cnt, slots_per_blk;
2185
2186 sema_init(&hisi_hba->sem, 1);
2187 spin_lock_init(&hisi_hba->lock);
2188 for (i = 0; i < hisi_hba->n_phy; i++) {
2189 hisi_sas_phy_init(hisi_hba, i);
2190 hisi_hba->port[i].port_attached = 0;
2191 hisi_hba->port[i].id = -1;
2192 }
2193
2194 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2195 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2196 hisi_hba->devices[i].device_id = i;
2197 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2198 }
2199
2200 for (i = 0; i < hisi_hba->queue_count; i++) {
2201 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2202 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2203
2204 /* Completion queue structure */
2205 cq->id = i;
2206 cq->hisi_hba = hisi_hba;
2207 spin_lock_init(&cq->poll_lock);
2208
2209 /* Delivery queue structure */
2210 spin_lock_init(&dq->lock);
2211 INIT_LIST_HEAD(&dq->list);
2212 dq->id = i;
2213 dq->hisi_hba = hisi_hba;
2214
2215 /* Delivery queue */
2216 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2217 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2218 &hisi_hba->cmd_hdr_dma[i],
2219 GFP_KERNEL);
2220 if (!hisi_hba->cmd_hdr[i])
2221 goto err_out;
2222
2223 /* Completion queue */
2224 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2225 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2226 &hisi_hba->complete_hdr_dma[i],
2227 GFP_KERNEL);
2228 if (!hisi_hba->complete_hdr[i])
2229 goto err_out;
2230 }
2231
2232 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2233 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2234 GFP_KERNEL);
2235 if (!hisi_hba->itct)
2236 goto err_out;
2237
2238 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2239 sizeof(struct hisi_sas_slot),
2240 GFP_KERNEL);
2241 if (!hisi_hba->slot_info)
2242 goto err_out;
2243
2244 /* roundup to avoid overly large block size */
2245 max_command_entries_ru = roundup(max_command_entries, 64);
2246 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2247 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2248 else
2249 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2250 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2251 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2252 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2253 slots_per_blk = s / sz_slot_buf_ru;
2254
2255 for (i = 0; i < blk_cnt; i++) {
2256 int slot_index = i * slots_per_blk;
2257 dma_addr_t buf_dma;
2258 void *buf;
2259
2260 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2261 GFP_KERNEL);
2262 if (!buf)
2263 goto err_out;
2264
2265 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2266 struct hisi_sas_slot *slot;
2267
2268 slot = &hisi_hba->slot_info[slot_index];
2269 slot->buf = buf;
2270 slot->buf_dma = buf_dma;
2271 slot->idx = slot_index;
2272
2273 buf += sz_slot_buf_ru;
2274 buf_dma += sz_slot_buf_ru;
2275 }
2276 }
2277
2278 s = max_command_entries * sizeof(struct hisi_sas_iost);
2279 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2280 GFP_KERNEL);
2281 if (!hisi_hba->iost)
2282 goto err_out;
2283
2284 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2285 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2286 &hisi_hba->breakpoint_dma,
2287 GFP_KERNEL);
2288 if (!hisi_hba->breakpoint)
2289 goto err_out;
2290
2291 s = hisi_hba->slot_index_count = max_command_entries;
2292 hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);
2293 if (!hisi_hba->slot_index_tags)
2294 goto err_out;
2295
2296 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2297 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2298 &hisi_hba->initial_fis_dma,
2299 GFP_KERNEL);
2300 if (!hisi_hba->initial_fis)
2301 goto err_out;
2302
2303 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2304 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2305 &hisi_hba->sata_breakpoint_dma,
2306 GFP_KERNEL);
2307 if (!hisi_hba->sata_breakpoint)
2308 goto err_out;
2309
2310 hisi_hba->last_slot_index = 0;
2311
2312 hisi_hba->wq =
2313 alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, dev_name(dev));
2314 if (!hisi_hba->wq) {
2315 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2316 goto err_out;
2317 }
2318
2319 return 0;
2320 err_out:
2321 return -ENOMEM;
2322 }
2323 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2324
hisi_sas_free(struct hisi_hba * hisi_hba)2325 void hisi_sas_free(struct hisi_hba *hisi_hba)
2326 {
2327 int i;
2328
2329 for (i = 0; i < hisi_hba->n_phy; i++) {
2330 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2331
2332 del_timer_sync(&phy->timer);
2333 }
2334
2335 if (hisi_hba->wq)
2336 destroy_workqueue(hisi_hba->wq);
2337 }
2338 EXPORT_SYMBOL_GPL(hisi_sas_free);
2339
hisi_sas_rst_work_handler(struct work_struct * work)2340 void hisi_sas_rst_work_handler(struct work_struct *work)
2341 {
2342 struct hisi_hba *hisi_hba =
2343 container_of(work, struct hisi_hba, rst_work);
2344
2345 if (hisi_sas_controller_prereset(hisi_hba))
2346 return;
2347
2348 hisi_sas_controller_reset(hisi_hba);
2349 }
2350 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2351
hisi_sas_sync_rst_work_handler(struct work_struct * work)2352 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2353 {
2354 struct hisi_sas_rst *rst =
2355 container_of(work, struct hisi_sas_rst, work);
2356
2357 if (hisi_sas_controller_prereset(rst->hisi_hba))
2358 goto rst_complete;
2359
2360 if (!hisi_sas_controller_reset(rst->hisi_hba))
2361 rst->done = true;
2362 rst_complete:
2363 complete(rst->completion);
2364 }
2365 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2366
hisi_sas_get_fw_info(struct hisi_hba * hisi_hba)2367 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2368 {
2369 struct device *dev = hisi_hba->dev;
2370 struct platform_device *pdev = hisi_hba->platform_dev;
2371 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2372 struct clk *refclk;
2373
2374 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2375 SAS_ADDR_SIZE)) {
2376 dev_err(dev, "could not get property sas-addr\n");
2377 return -ENOENT;
2378 }
2379
2380 if (np) {
2381 /*
2382 * These properties are only required for platform device-based
2383 * controller with DT firmware.
2384 */
2385 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2386 "hisilicon,sas-syscon");
2387 if (IS_ERR(hisi_hba->ctrl)) {
2388 dev_err(dev, "could not get syscon\n");
2389 return -ENOENT;
2390 }
2391
2392 if (device_property_read_u32(dev, "ctrl-reset-reg",
2393 &hisi_hba->ctrl_reset_reg)) {
2394 dev_err(dev, "could not get property ctrl-reset-reg\n");
2395 return -ENOENT;
2396 }
2397
2398 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2399 &hisi_hba->ctrl_reset_sts_reg)) {
2400 dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2401 return -ENOENT;
2402 }
2403
2404 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2405 &hisi_hba->ctrl_clock_ena_reg)) {
2406 dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2407 return -ENOENT;
2408 }
2409 }
2410
2411 refclk = devm_clk_get(dev, NULL);
2412 if (IS_ERR(refclk))
2413 dev_dbg(dev, "no ref clk property\n");
2414 else
2415 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2416
2417 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2418 dev_err(dev, "could not get property phy-count\n");
2419 return -ENOENT;
2420 }
2421
2422 if (device_property_read_u32(dev, "queue-count",
2423 &hisi_hba->queue_count)) {
2424 dev_err(dev, "could not get property queue-count\n");
2425 return -ENOENT;
2426 }
2427
2428 return 0;
2429 }
2430 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2431
hisi_sas_shost_alloc(struct platform_device * pdev,const struct hisi_sas_hw * hw)2432 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2433 const struct hisi_sas_hw *hw)
2434 {
2435 struct resource *res;
2436 struct Scsi_Host *shost;
2437 struct hisi_hba *hisi_hba;
2438 struct device *dev = &pdev->dev;
2439 int error;
2440
2441 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2442 if (!shost) {
2443 dev_err(dev, "scsi host alloc failed\n");
2444 return NULL;
2445 }
2446 hisi_hba = shost_priv(shost);
2447
2448 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2449 hisi_hba->hw = hw;
2450 hisi_hba->dev = dev;
2451 hisi_hba->platform_dev = pdev;
2452 hisi_hba->shost = shost;
2453 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2454
2455 timer_setup(&hisi_hba->timer, NULL, 0);
2456
2457 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2458 goto err_out;
2459
2460 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2461 if (error) {
2462 dev_err(dev, "No usable DMA addressing method\n");
2463 goto err_out;
2464 }
2465
2466 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2467 if (IS_ERR(hisi_hba->regs))
2468 goto err_out;
2469
2470 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2471 if (res) {
2472 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2473 if (IS_ERR(hisi_hba->sgpio_regs))
2474 goto err_out;
2475 }
2476
2477 if (hisi_sas_alloc(hisi_hba)) {
2478 hisi_sas_free(hisi_hba);
2479 goto err_out;
2480 }
2481
2482 return shost;
2483 err_out:
2484 scsi_host_put(shost);
2485 dev_err(dev, "shost alloc failed\n");
2486 return NULL;
2487 }
2488
hisi_sas_interrupt_preinit(struct hisi_hba * hisi_hba)2489 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2490 {
2491 if (hisi_hba->hw->interrupt_preinit)
2492 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2493 return 0;
2494 }
2495
hisi_sas_probe(struct platform_device * pdev,const struct hisi_sas_hw * hw)2496 int hisi_sas_probe(struct platform_device *pdev,
2497 const struct hisi_sas_hw *hw)
2498 {
2499 struct Scsi_Host *shost;
2500 struct hisi_hba *hisi_hba;
2501 struct device *dev = &pdev->dev;
2502 struct asd_sas_phy **arr_phy;
2503 struct asd_sas_port **arr_port;
2504 struct sas_ha_struct *sha;
2505 int rc, phy_nr, port_nr, i;
2506
2507 shost = hisi_sas_shost_alloc(pdev, hw);
2508 if (!shost)
2509 return -ENOMEM;
2510
2511 sha = SHOST_TO_SAS_HA(shost);
2512 hisi_hba = shost_priv(shost);
2513 platform_set_drvdata(pdev, sha);
2514
2515 phy_nr = port_nr = hisi_hba->n_phy;
2516
2517 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2518 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2519 if (!arr_phy || !arr_port) {
2520 rc = -ENOMEM;
2521 goto err_out_ha;
2522 }
2523
2524 sha->sas_phy = arr_phy;
2525 sha->sas_port = arr_port;
2526 sha->lldd_ha = hisi_hba;
2527
2528 shost->transportt = hisi_sas_stt;
2529 shost->max_id = HISI_SAS_MAX_DEVICES;
2530 shost->max_lun = ~0;
2531 shost->max_channel = 1;
2532 shost->max_cmd_len = 16;
2533 if (hisi_hba->hw->slot_index_alloc) {
2534 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2535 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2536 } else {
2537 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2538 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2539 }
2540
2541 sha->sas_ha_name = DRV_NAME;
2542 sha->dev = hisi_hba->dev;
2543 sha->sas_addr = &hisi_hba->sas_addr[0];
2544 sha->num_phys = hisi_hba->n_phy;
2545 sha->shost = hisi_hba->shost;
2546
2547 for (i = 0; i < hisi_hba->n_phy; i++) {
2548 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2549 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2550 }
2551
2552 rc = hisi_sas_interrupt_preinit(hisi_hba);
2553 if (rc)
2554 goto err_out_ha;
2555
2556 rc = scsi_add_host(shost, &pdev->dev);
2557 if (rc)
2558 goto err_out_ha;
2559
2560 rc = sas_register_ha(sha);
2561 if (rc)
2562 goto err_out_register_ha;
2563
2564 rc = hisi_hba->hw->hw_init(hisi_hba);
2565 if (rc)
2566 goto err_out_hw_init;
2567
2568 scsi_scan_host(shost);
2569
2570 return 0;
2571
2572 err_out_hw_init:
2573 sas_unregister_ha(sha);
2574 err_out_register_ha:
2575 scsi_remove_host(shost);
2576 err_out_ha:
2577 hisi_sas_free(hisi_hba);
2578 scsi_host_put(shost);
2579 return rc;
2580 }
2581 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2582
hisi_sas_remove(struct platform_device * pdev)2583 void hisi_sas_remove(struct platform_device *pdev)
2584 {
2585 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2586 struct hisi_hba *hisi_hba = sha->lldd_ha;
2587 struct Scsi_Host *shost = sha->shost;
2588
2589 del_timer_sync(&hisi_hba->timer);
2590
2591 sas_unregister_ha(sha);
2592 sas_remove_host(shost);
2593
2594 hisi_sas_free(hisi_hba);
2595 scsi_host_put(shost);
2596 }
2597 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2598
2599 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2600 #define DEBUGFS_ENABLE_DEFAULT "enabled"
2601 bool hisi_sas_debugfs_enable = true;
2602 u32 hisi_sas_debugfs_dump_count = 50;
2603 #else
2604 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2605 bool hisi_sas_debugfs_enable;
2606 u32 hisi_sas_debugfs_dump_count = 1;
2607 #endif
2608
2609 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2610 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2611 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2612 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2613
2614 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2615 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2616 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2617
2618 struct dentry *hisi_sas_debugfs_dir;
2619 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2620
hisi_sas_init(void)2621 static __init int hisi_sas_init(void)
2622 {
2623 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2624 if (!hisi_sas_stt)
2625 return -ENOMEM;
2626
2627 if (hisi_sas_debugfs_enable) {
2628 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2629 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2630 pr_info("hisi_sas: Limiting debugfs dump count\n");
2631 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2632 }
2633 }
2634
2635 return 0;
2636 }
2637
hisi_sas_exit(void)2638 static __exit void hisi_sas_exit(void)
2639 {
2640 sas_release_transport(hisi_sas_stt);
2641
2642 if (hisi_sas_debugfs_enable)
2643 debugfs_remove(hisi_sas_debugfs_dir);
2644 }
2645
2646 module_init(hisi_sas_init);
2647 module_exit(hisi_sas_exit);
2648
2649 MODULE_LICENSE("GPL");
2650 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2651 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2652 MODULE_ALIAS("platform:" DRV_NAME);
2653