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_sdev_init(struct scsi_device * sdev)808 int hisi_sas_sdev_init(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_sdev_init(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_sdev_init);
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_sdev_configure(struct scsi_device * sdev,struct queue_limits * lim)871 int hisi_sas_sdev_configure(struct scsi_device *sdev, struct queue_limits *lim)
872 {
873 struct domain_device *dev = sdev_to_domain_dev(sdev);
874 int ret = sas_sdev_configure(sdev, lim);
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_sdev_configure);
884
hisi_sas_scan_start(struct Scsi_Host * shost)885 void hisi_sas_scan_start(struct Scsi_Host *shost)
886 {
887 struct hisi_hba *hisi_hba = shost_priv(shost);
888
889 hisi_hba->hw->phys_init(hisi_hba);
890 }
891 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
892
hisi_sas_scan_finished(struct Scsi_Host * shost,unsigned long time)893 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
894 {
895 struct hisi_hba *hisi_hba = shost_priv(shost);
896 struct sas_ha_struct *sha = &hisi_hba->sha;
897
898 /* Wait for PHY up interrupt to occur */
899 if (time < HZ)
900 return 0;
901
902 sas_drain_work(sha);
903 return 1;
904 }
905 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
906
hisi_sas_phyup_work_common(struct work_struct * work,enum hisi_sas_phy_event event)907 static void hisi_sas_phyup_work_common(struct work_struct *work,
908 enum hisi_sas_phy_event event)
909 {
910 struct hisi_sas_phy *phy =
911 container_of(work, typeof(*phy), works[event]);
912 struct hisi_hba *hisi_hba = phy->hisi_hba;
913 struct asd_sas_phy *sas_phy = &phy->sas_phy;
914 int phy_no = sas_phy->id;
915
916 phy->wait_phyup_cnt = 0;
917 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
918 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
919 hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
920 }
921
hisi_sas_phyup_work(struct work_struct * work)922 static void hisi_sas_phyup_work(struct work_struct *work)
923 {
924 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);
925 }
926
hisi_sas_linkreset_work(struct work_struct * work)927 static void hisi_sas_linkreset_work(struct work_struct *work)
928 {
929 struct hisi_sas_phy *phy =
930 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
931 struct asd_sas_phy *sas_phy = &phy->sas_phy;
932
933 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
934 }
935
hisi_sas_phyup_pm_work(struct work_struct * work)936 static void hisi_sas_phyup_pm_work(struct work_struct *work)
937 {
938 struct hisi_sas_phy *phy =
939 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);
940 struct hisi_hba *hisi_hba = phy->hisi_hba;
941 struct device *dev = hisi_hba->dev;
942
943 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);
944 pm_runtime_put_sync(dev);
945 }
946
947 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
948 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
949 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
950 [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,
951 };
952
hisi_sas_notify_phy_event(struct hisi_sas_phy * phy,enum hisi_sas_phy_event event)953 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
954 enum hisi_sas_phy_event event)
955 {
956 struct hisi_hba *hisi_hba = phy->hisi_hba;
957
958 if (WARN_ON(event >= HISI_PHYES_NUM))
959 return false;
960
961 return queue_work(hisi_hba->wq, &phy->works[event]);
962 }
963 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
964
hisi_sas_wait_phyup_timedout(struct timer_list * t)965 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
966 {
967 struct hisi_sas_phy *phy = from_timer(phy, t, timer);
968 struct hisi_hba *hisi_hba = phy->hisi_hba;
969 struct device *dev = hisi_hba->dev;
970 int phy_no = phy->sas_phy.id;
971
972 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
973 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
974 }
975
976 #define HISI_SAS_WAIT_PHYUP_RETRIES 10
977
hisi_sas_phy_oob_ready(struct hisi_hba * hisi_hba,int phy_no)978 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
979 {
980 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
981 struct device *dev = hisi_hba->dev;
982 unsigned long flags;
983
984 dev_dbg(dev, "phy%d OOB ready\n", phy_no);
985 spin_lock_irqsave(&phy->lock, flags);
986 if (phy->phy_attached) {
987 spin_unlock_irqrestore(&phy->lock, flags);
988 return;
989 }
990
991 if (!timer_pending(&phy->timer)) {
992 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
993 phy->wait_phyup_cnt++;
994 phy->timer.expires = jiffies +
995 HISI_SAS_WAIT_PHYUP_TIMEOUT;
996 add_timer(&phy->timer);
997 spin_unlock_irqrestore(&phy->lock, flags);
998 return;
999 }
1000
1001 dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
1002 phy_no, phy->wait_phyup_cnt);
1003 phy->wait_phyup_cnt = 0;
1004 }
1005 spin_unlock_irqrestore(&phy->lock, flags);
1006 }
1007
1008 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
1009
hisi_sas_phy_init(struct hisi_hba * hisi_hba,int phy_no)1010 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
1011 {
1012 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1013 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1014 int i;
1015
1016 phy->hisi_hba = hisi_hba;
1017 phy->port = NULL;
1018 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
1019 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
1020 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
1021 sas_phy->iproto = SAS_PROTOCOL_ALL;
1022 sas_phy->tproto = 0;
1023 sas_phy->role = PHY_ROLE_INITIATOR;
1024 sas_phy->oob_mode = OOB_NOT_CONNECTED;
1025 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
1026 sas_phy->id = phy_no;
1027 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
1028 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
1029 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
1030 sas_phy->lldd_phy = phy;
1031
1032 for (i = 0; i < HISI_PHYES_NUM; i++)
1033 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
1034
1035 spin_lock_init(&phy->lock);
1036
1037 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
1038 }
1039
1040 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
hisi_sas_phy_enable(struct hisi_hba * hisi_hba,int phy_no,int enable)1041 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
1042 {
1043 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1044 struct asd_sas_phy *aphy = &phy->sas_phy;
1045 struct sas_phy *sphy = aphy->phy;
1046 unsigned long flags;
1047
1048 spin_lock_irqsave(&phy->lock, flags);
1049
1050 if (enable) {
1051 /* We may have been enabled already; if so, don't touch */
1052 if (!phy->enable)
1053 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
1054 hisi_hba->hw->phy_start(hisi_hba, phy_no);
1055 } else {
1056 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
1057 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1058 }
1059 phy->enable = enable;
1060 spin_unlock_irqrestore(&phy->lock, flags);
1061 }
1062 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
1063
hisi_sas_port_notify_formed(struct asd_sas_phy * sas_phy)1064 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
1065 {
1066 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1067 struct asd_sas_port *sas_port = sas_phy->port;
1068 struct hisi_sas_port *port;
1069
1070 if (!sas_port)
1071 return;
1072
1073 port = to_hisi_sas_port(sas_port);
1074 port->port_attached = 1;
1075 port->id = phy->port_id;
1076 phy->port = port;
1077 sas_port->lldd_port = port;
1078 }
1079
hisi_sas_do_release_task(struct hisi_hba * hisi_hba,struct sas_task * task,struct hisi_sas_slot * slot,bool need_lock)1080 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1081 struct hisi_sas_slot *slot, bool need_lock)
1082 {
1083 if (task) {
1084 unsigned long flags;
1085 struct task_status_struct *ts;
1086
1087 ts = &task->task_status;
1088
1089 ts->resp = SAS_TASK_COMPLETE;
1090 ts->stat = SAS_ABORTED_TASK;
1091 spin_lock_irqsave(&task->task_state_lock, flags);
1092 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1093 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1094 task->task_state_flags |= SAS_TASK_STATE_DONE;
1095 spin_unlock_irqrestore(&task->task_state_lock, flags);
1096 }
1097
1098 hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock);
1099 }
1100
hisi_sas_release_task(struct hisi_hba * hisi_hba,struct domain_device * device)1101 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1102 struct domain_device *device)
1103 {
1104 struct hisi_sas_slot *slot, *slot2;
1105 struct hisi_sas_device *sas_dev = device->lldd_dev;
1106
1107 spin_lock(&sas_dev->lock);
1108 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1109 hisi_sas_do_release_task(hisi_hba, slot->task, slot, false);
1110
1111 spin_unlock(&sas_dev->lock);
1112 }
1113
hisi_sas_release_tasks(struct hisi_hba * hisi_hba)1114 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1115 {
1116 struct hisi_sas_device *sas_dev;
1117 struct domain_device *device;
1118 int i;
1119
1120 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1121 sas_dev = &hisi_hba->devices[i];
1122 device = sas_dev->sas_device;
1123
1124 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1125 !device)
1126 continue;
1127
1128 hisi_sas_release_task(hisi_hba, device);
1129 }
1130 }
1131 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1132
hisi_sas_dereg_device(struct hisi_hba * hisi_hba,struct domain_device * device)1133 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1134 struct domain_device *device)
1135 {
1136 if (hisi_hba->hw->dereg_device)
1137 hisi_hba->hw->dereg_device(hisi_hba, device);
1138 }
1139
1140 static int
hisi_sas_internal_task_abort_dev(struct hisi_sas_device * sas_dev,bool rst_ha_timeout)1141 hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev,
1142 bool rst_ha_timeout)
1143 {
1144 struct hisi_sas_internal_abort_data data = { rst_ha_timeout };
1145 struct domain_device *device = sas_dev->sas_device;
1146 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1147 int i, rc;
1148
1149 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
1150 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1151 const struct cpumask *mask = cq->irq_mask;
1152
1153 if (mask && !cpumask_intersects(cpu_online_mask, mask))
1154 continue;
1155 rc = sas_execute_internal_abort_dev(device, i, &data);
1156 if (rc)
1157 return rc;
1158 }
1159
1160 return 0;
1161 }
1162
hisi_sas_dev_gone(struct domain_device * device)1163 static void hisi_sas_dev_gone(struct domain_device *device)
1164 {
1165 struct hisi_sas_device *sas_dev = device->lldd_dev;
1166 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1167 struct device *dev = hisi_hba->dev;
1168 int ret = 0;
1169
1170 dev_info(dev, "dev[%d:%x] is gone\n",
1171 sas_dev->device_id, sas_dev->dev_type);
1172
1173 down(&hisi_hba->sem);
1174 if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1175 hisi_sas_internal_task_abort_dev(sas_dev, true);
1176
1177 hisi_sas_dereg_device(hisi_hba, device);
1178
1179 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1180 device->lldd_dev = NULL;
1181 }
1182
1183 if (hisi_hba->hw->free_device)
1184 hisi_hba->hw->free_device(sas_dev);
1185
1186 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1187 if (!ret)
1188 sas_dev->dev_type = SAS_PHY_UNUSED;
1189 sas_dev->sas_device = NULL;
1190 up(&hisi_hba->sem);
1191 }
1192
hisi_sas_phy_set_linkrate(struct hisi_hba * hisi_hba,int phy_no,struct sas_phy_linkrates * r)1193 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1194 struct sas_phy_linkrates *r)
1195 {
1196 struct sas_phy_linkrates _r;
1197
1198 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1199 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1200 enum sas_linkrate min, max;
1201
1202 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1203 return -EINVAL;
1204
1205 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1206 max = sas_phy->phy->maximum_linkrate;
1207 min = r->minimum_linkrate;
1208 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1209 max = r->maximum_linkrate;
1210 min = sas_phy->phy->minimum_linkrate;
1211 } else
1212 return -EINVAL;
1213
1214 _r.maximum_linkrate = max;
1215 _r.minimum_linkrate = min;
1216
1217 sas_phy->phy->maximum_linkrate = max;
1218 sas_phy->phy->minimum_linkrate = min;
1219
1220 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1221 msleep(100);
1222 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1223 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1224
1225 return 0;
1226 }
1227
hisi_sas_control_phy(struct asd_sas_phy * sas_phy,enum phy_func func,void * funcdata)1228 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1229 void *funcdata)
1230 {
1231 struct hisi_sas_phy *phy = container_of(sas_phy,
1232 struct hisi_sas_phy, sas_phy);
1233 struct sas_ha_struct *sas_ha = sas_phy->ha;
1234 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1235 struct device *dev = hisi_hba->dev;
1236 DECLARE_COMPLETION_ONSTACK(completion);
1237 int phy_no = sas_phy->id;
1238 u8 sts = phy->phy_attached;
1239 int ret = 0;
1240
1241 down(&hisi_hba->sem);
1242 phy->reset_completion = &completion;
1243
1244 switch (func) {
1245 case PHY_FUNC_HARD_RESET:
1246 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1247 break;
1248
1249 case PHY_FUNC_LINK_RESET:
1250 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1251 msleep(100);
1252 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1253 break;
1254
1255 case PHY_FUNC_DISABLE:
1256 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1257 goto out;
1258
1259 case PHY_FUNC_SET_LINK_RATE:
1260 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1261 break;
1262
1263 case PHY_FUNC_GET_EVENTS:
1264 if (hisi_hba->hw->get_events) {
1265 hisi_hba->hw->get_events(hisi_hba, phy_no);
1266 goto out;
1267 }
1268 fallthrough;
1269 case PHY_FUNC_RELEASE_SPINUP_HOLD:
1270 default:
1271 ret = -EOPNOTSUPP;
1272 goto out;
1273 }
1274
1275 if (sts && !wait_for_completion_timeout(&completion,
1276 HISI_SAS_WAIT_PHYUP_TIMEOUT)) {
1277 dev_warn(dev, "phy%d wait phyup timed out for func %d\n",
1278 phy_no, func);
1279 if (phy->in_reset)
1280 ret = -ETIMEDOUT;
1281 }
1282
1283 out:
1284 phy->reset_completion = NULL;
1285
1286 up(&hisi_hba->sem);
1287 return ret;
1288 }
1289
hisi_sas_fill_ata_reset_cmd(struct ata_device * dev,bool reset,int pmp,u8 * fis)1290 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1291 bool reset, int pmp, u8 *fis)
1292 {
1293 struct ata_taskfile tf;
1294
1295 ata_tf_init(dev, &tf);
1296 if (reset)
1297 tf.ctl |= ATA_SRST;
1298 else
1299 tf.ctl &= ~ATA_SRST;
1300 tf.command = ATA_CMD_DEV_RESET;
1301 ata_tf_to_fis(&tf, pmp, 0, fis);
1302 }
1303
hisi_sas_softreset_ata_disk(struct domain_device * device)1304 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1305 {
1306 u8 fis[20] = {0};
1307 struct ata_port *ap = device->sata_dev.ap;
1308 struct ata_link *link;
1309 int rc = TMF_RESP_FUNC_FAILED;
1310 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1311 struct device *dev = hisi_hba->dev;
1312
1313 ata_for_each_link(link, ap, EDGE) {
1314 int pmp = sata_srst_pmp(link);
1315
1316 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1317 rc = sas_execute_ata_cmd(device, fis, -1);
1318 if (rc != TMF_RESP_FUNC_COMPLETE)
1319 break;
1320 }
1321
1322 if (rc == TMF_RESP_FUNC_COMPLETE) {
1323 usleep_range(900, 1000);
1324 ata_for_each_link(link, ap, EDGE) {
1325 int pmp = sata_srst_pmp(link);
1326
1327 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1328 rc = sas_execute_ata_cmd(device, fis, -1);
1329 if (rc != TMF_RESP_FUNC_COMPLETE)
1330 dev_err(dev, "ata disk %016llx de-reset failed\n",
1331 SAS_ADDR(device->sas_addr));
1332 }
1333 } else {
1334 dev_err(dev, "ata disk %016llx reset failed\n",
1335 SAS_ADDR(device->sas_addr));
1336 }
1337
1338 if (rc == TMF_RESP_FUNC_COMPLETE)
1339 hisi_sas_release_task(hisi_hba, device);
1340
1341 return rc;
1342 }
1343
hisi_sas_refresh_port_id(struct hisi_hba * hisi_hba)1344 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1345 {
1346 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1347 int i;
1348
1349 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1350 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1351 struct domain_device *device = sas_dev->sas_device;
1352 struct asd_sas_port *sas_port;
1353 struct hisi_sas_port *port;
1354 struct hisi_sas_phy *phy = NULL;
1355 struct asd_sas_phy *sas_phy;
1356
1357 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1358 || !device || !device->port)
1359 continue;
1360
1361 sas_port = device->port;
1362 port = to_hisi_sas_port(sas_port);
1363
1364 spin_lock(&sas_port->phy_list_lock);
1365 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1366 if (state & BIT(sas_phy->id)) {
1367 phy = sas_phy->lldd_phy;
1368 break;
1369 }
1370 spin_unlock(&sas_port->phy_list_lock);
1371
1372 if (phy) {
1373 port->id = phy->port_id;
1374
1375 /* Update linkrate of directly attached device. */
1376 if (!device->parent)
1377 device->linkrate = phy->sas_phy.linkrate;
1378
1379 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1380 } else if (!port->port_attached)
1381 port->id = 0xff;
1382 }
1383 }
1384
hisi_sas_rescan_topology(struct hisi_hba * hisi_hba,u32 state)1385 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1386 {
1387 u32 new_state = hisi_hba->hw->get_phys_state(hisi_hba);
1388 struct asd_sas_port *_sas_port = NULL;
1389 int phy_no;
1390
1391 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1392 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1393 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1394 struct asd_sas_port *sas_port = sas_phy->port;
1395 bool do_port_check = _sas_port != sas_port;
1396
1397 if (!sas_phy->phy->enabled)
1398 continue;
1399
1400 /* Report PHY state change to libsas */
1401 if (new_state & BIT(phy_no)) {
1402 if (do_port_check && sas_port && sas_port->port_dev) {
1403 struct domain_device *dev = sas_port->port_dev;
1404
1405 _sas_port = sas_port;
1406
1407 if (dev_is_expander(dev->dev_type))
1408 sas_notify_port_event(sas_phy,
1409 PORTE_BROADCAST_RCVD,
1410 GFP_KERNEL);
1411 }
1412 } else {
1413 hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1414
1415 /*
1416 * The new_state is not ready but old_state is ready,
1417 * the two possible causes:
1418 * 1. The connected device is removed
1419 * 2. Device exists but phyup timed out
1420 */
1421 if (state & BIT(phy_no))
1422 hisi_sas_notify_phy_event(phy,
1423 HISI_PHYE_LINK_RESET);
1424 }
1425 }
1426 }
1427
hisi_sas_reset_init_all_devices(struct hisi_hba * hisi_hba)1428 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1429 {
1430 struct hisi_sas_device *sas_dev;
1431 struct domain_device *device;
1432 int i;
1433
1434 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1435 sas_dev = &hisi_hba->devices[i];
1436 device = sas_dev->sas_device;
1437
1438 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1439 continue;
1440
1441 hisi_sas_init_device(device);
1442 }
1443 }
1444
hisi_sas_send_ata_reset_each_phy(struct hisi_hba * hisi_hba,struct asd_sas_port * sas_port,struct domain_device * device)1445 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1446 struct asd_sas_port *sas_port,
1447 struct domain_device *device)
1448 {
1449 struct ata_port *ap = device->sata_dev.ap;
1450 struct device *dev = hisi_hba->dev;
1451 int rc = TMF_RESP_FUNC_FAILED;
1452 struct ata_link *link;
1453 u8 fis[20] = {0};
1454 int i;
1455
1456 for (i = 0; i < hisi_hba->n_phy; i++) {
1457 if (!(sas_port->phy_mask & BIT(i)))
1458 continue;
1459
1460 ata_for_each_link(link, ap, EDGE) {
1461 int pmp = sata_srst_pmp(link);
1462
1463 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1464 rc = sas_execute_ata_cmd(device, fis, i);
1465 if (rc != TMF_RESP_FUNC_COMPLETE) {
1466 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1467 i, rc);
1468 break;
1469 }
1470 }
1471 }
1472 }
1473
hisi_sas_terminate_stp_reject(struct hisi_hba * hisi_hba)1474 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1475 {
1476 struct device *dev = hisi_hba->dev;
1477 int port_no, rc, i;
1478
1479 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1480 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1481 struct domain_device *device = sas_dev->sas_device;
1482
1483 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1484 continue;
1485
1486 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1487 if (rc < 0)
1488 dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1489 }
1490
1491 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1492 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1493 struct asd_sas_port *sas_port = &port->sas_port;
1494 struct domain_device *port_dev = sas_port->port_dev;
1495 struct domain_device *device;
1496
1497 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1498 continue;
1499
1500 /* Try to find a SATA device */
1501 list_for_each_entry(device, &sas_port->dev_list,
1502 dev_list_node) {
1503 if (dev_is_sata(device)) {
1504 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1505 sas_port,
1506 device);
1507 break;
1508 }
1509 }
1510 }
1511 }
1512
hisi_sas_controller_reset_prepare(struct hisi_hba * hisi_hba)1513 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1514 {
1515 struct Scsi_Host *shost = hisi_hba->shost;
1516
1517 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1518
1519 scsi_block_requests(shost);
1520 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1521
1522 /*
1523 * hisi_hba->timer is only used for v1/v2 hw, and check hw->sht
1524 * which is also only used for v1/v2 hw to skip it for v3 hw
1525 */
1526 if (hisi_hba->hw->sht)
1527 del_timer_sync(&hisi_hba->timer);
1528
1529 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1530 }
1531 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1532
hisi_sas_async_init_wait_phyup(void * data,async_cookie_t cookie)1533 static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie)
1534 {
1535 struct hisi_sas_phy *phy = data;
1536 struct hisi_hba *hisi_hba = phy->hisi_hba;
1537 struct device *dev = hisi_hba->dev;
1538 DECLARE_COMPLETION_ONSTACK(completion);
1539 int phy_no = phy->sas_phy.id;
1540
1541 phy->reset_completion = &completion;
1542 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1543 if (!wait_for_completion_timeout(&completion,
1544 HISI_SAS_WAIT_PHYUP_TIMEOUT))
1545 dev_warn(dev, "phy%d wait phyup timed out\n", phy_no);
1546
1547 phy->reset_completion = NULL;
1548 }
1549
hisi_sas_controller_reset_done(struct hisi_hba * hisi_hba)1550 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1551 {
1552 struct Scsi_Host *shost = hisi_hba->shost;
1553 ASYNC_DOMAIN_EXCLUSIVE(async);
1554 int phy_no;
1555
1556 /* Init and wait for PHYs to come up and all libsas event finished. */
1557 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1558 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1559 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1560
1561 if (!sas_phy->phy->enabled)
1562 continue;
1563
1564 if (!(hisi_hba->phy_state & BIT(phy_no))) {
1565 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1566 continue;
1567 }
1568
1569 async_schedule_domain(hisi_sas_async_init_wait_phyup,
1570 phy, &async);
1571 }
1572
1573 async_synchronize_full_domain(&async);
1574 hisi_sas_refresh_port_id(hisi_hba);
1575 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1576
1577 if (hisi_hba->reject_stp_links_msk)
1578 hisi_sas_terminate_stp_reject(hisi_hba);
1579 hisi_sas_reset_init_all_devices(hisi_hba);
1580 scsi_unblock_requests(shost);
1581 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1582 up(&hisi_hba->sem);
1583
1584 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1585 }
1586 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1587
hisi_sas_controller_prereset(struct hisi_hba * hisi_hba)1588 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1589 {
1590 if (!hisi_hba->hw->soft_reset)
1591 return -ENOENT;
1592
1593 down(&hisi_hba->sem);
1594 if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1595 up(&hisi_hba->sem);
1596 return -EPERM;
1597 }
1598
1599 if (hisi_sas_debugfs_enable)
1600 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1601
1602 return 0;
1603 }
1604
hisi_sas_controller_reset(struct hisi_hba * hisi_hba)1605 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1606 {
1607 struct device *dev = hisi_hba->dev;
1608 struct Scsi_Host *shost = hisi_hba->shost;
1609 int rc;
1610
1611 dev_info(dev, "controller resetting...\n");
1612 hisi_sas_controller_reset_prepare(hisi_hba);
1613
1614 rc = hisi_hba->hw->soft_reset(hisi_hba);
1615 if (rc) {
1616 dev_warn(dev, "controller reset failed (%d)\n", rc);
1617 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1618 up(&hisi_hba->sem);
1619 scsi_unblock_requests(shost);
1620 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1621 return rc;
1622 }
1623 clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1624
1625 hisi_sas_controller_reset_done(hisi_hba);
1626 dev_info(dev, "controller reset complete\n");
1627
1628 return 0;
1629 }
1630
hisi_sas_abort_task(struct sas_task * task)1631 static int hisi_sas_abort_task(struct sas_task *task)
1632 {
1633 struct hisi_sas_internal_abort_data internal_abort_data = { false };
1634 struct domain_device *device = task->dev;
1635 struct hisi_sas_device *sas_dev = device->lldd_dev;
1636 struct hisi_sas_slot *slot = task->lldd_task;
1637 struct hisi_hba *hisi_hba;
1638 struct device *dev;
1639 int rc = TMF_RESP_FUNC_FAILED;
1640 unsigned long flags;
1641
1642 if (!sas_dev)
1643 return TMF_RESP_FUNC_FAILED;
1644
1645 hisi_hba = dev_to_hisi_hba(task->dev);
1646 dev = hisi_hba->dev;
1647
1648 spin_lock_irqsave(&task->task_state_lock, flags);
1649 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1650 struct hisi_sas_cq *cq;
1651
1652 if (slot) {
1653 /*
1654 * sync irq or poll queue to avoid free'ing task
1655 * before using task in IO completion
1656 */
1657 cq = &hisi_hba->cq[slot->dlvry_queue];
1658 hisi_sas_sync_cq(cq);
1659 }
1660 spin_unlock_irqrestore(&task->task_state_lock, flags);
1661 rc = TMF_RESP_FUNC_COMPLETE;
1662 goto out;
1663 }
1664 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1665 spin_unlock_irqrestore(&task->task_state_lock, flags);
1666
1667 if (!slot)
1668 goto out;
1669
1670 if (task->task_proto & SAS_PROTOCOL_SSP) {
1671 u16 tag = slot->idx;
1672 int rc2;
1673
1674 rc = sas_abort_task(task, tag);
1675 rc2 = sas_execute_internal_abort_single(device, tag,
1676 slot->dlvry_queue, &internal_abort_data);
1677 if (rc2 < 0) {
1678 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1679 return TMF_RESP_FUNC_FAILED;
1680 }
1681
1682 /*
1683 * If the TMF finds that the IO is not in the device and also
1684 * the internal abort does not succeed, then it is safe to
1685 * free the slot.
1686 * Note: if the internal abort succeeds then the slot
1687 * will have already been completed
1688 */
1689 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1690 if (task->lldd_task)
1691 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1692 }
1693 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1694 task->task_proto & SAS_PROTOCOL_STP) {
1695 if (task->dev->dev_type == SAS_SATA_DEV) {
1696 struct ata_queued_cmd *qc = task->uldd_task;
1697
1698 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1699 if (rc < 0) {
1700 dev_err(dev, "abort task: internal abort failed\n");
1701 goto out;
1702 }
1703 hisi_sas_dereg_device(hisi_hba, device);
1704
1705 /*
1706 * If an ATA internal command times out in ATA EH, it
1707 * need to execute soft reset, so check the scsicmd
1708 */
1709 if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) &&
1710 qc && qc->scsicmd) {
1711 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1712 rc = TMF_RESP_FUNC_COMPLETE;
1713 } else {
1714 rc = hisi_sas_softreset_ata_disk(device);
1715 }
1716 }
1717 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1718 /* SMP */
1719 u32 tag = slot->idx;
1720 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1721
1722 rc = sas_execute_internal_abort_single(device,
1723 tag, slot->dlvry_queue,
1724 &internal_abort_data);
1725 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1726 task->lldd_task) {
1727 /*
1728 * sync irq or poll queue to avoid free'ing task
1729 * before using task in IO completion
1730 */
1731 hisi_sas_sync_cq(cq);
1732 slot->task = NULL;
1733 }
1734 }
1735
1736 out:
1737 if (rc != TMF_RESP_FUNC_COMPLETE)
1738 dev_notice(dev, "abort task: rc=%d\n", rc);
1739 return rc;
1740 }
1741
hisi_sas_abort_task_set(struct domain_device * device,u8 * lun)1742 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1743 {
1744 struct hisi_sas_device *sas_dev = device->lldd_dev;
1745 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1746 struct device *dev = hisi_hba->dev;
1747 int rc;
1748
1749 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1750 if (rc < 0) {
1751 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1752 return TMF_RESP_FUNC_FAILED;
1753 }
1754 hisi_sas_dereg_device(hisi_hba, device);
1755
1756 rc = sas_abort_task_set(device, lun);
1757 if (rc == TMF_RESP_FUNC_COMPLETE)
1758 hisi_sas_release_task(hisi_hba, device);
1759
1760 return rc;
1761 }
1762
hisi_sas_debug_I_T_nexus_reset(struct domain_device * device)1763 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1764 {
1765 struct sas_phy *local_phy = sas_get_local_phy(device);
1766 struct hisi_sas_device *sas_dev = device->lldd_dev;
1767 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1768 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1769 int rc, reset_type;
1770
1771 if (!local_phy->enabled) {
1772 sas_put_local_phy(local_phy);
1773 return -ENODEV;
1774 }
1775
1776 if (scsi_is_sas_phy_local(local_phy)) {
1777 struct asd_sas_phy *sas_phy =
1778 sas_ha->sas_phy[local_phy->number];
1779 struct hisi_sas_phy *phy =
1780 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1781 unsigned long flags;
1782
1783 spin_lock_irqsave(&phy->lock, flags);
1784 phy->in_reset = 1;
1785 spin_unlock_irqrestore(&phy->lock, flags);
1786 }
1787
1788 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1789 !dev_is_sata(device)) ? true : false;
1790
1791 rc = sas_phy_reset(local_phy, reset_type);
1792 sas_put_local_phy(local_phy);
1793
1794 if (scsi_is_sas_phy_local(local_phy)) {
1795 struct asd_sas_phy *sas_phy =
1796 sas_ha->sas_phy[local_phy->number];
1797 struct hisi_sas_phy *phy =
1798 container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1799 unsigned long flags;
1800
1801 spin_lock_irqsave(&phy->lock, flags);
1802 phy->in_reset = 0;
1803 spin_unlock_irqrestore(&phy->lock, flags);
1804
1805 /* report PHY down if timed out */
1806 if (rc == -ETIMEDOUT)
1807 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1808 return rc;
1809 }
1810
1811 /* Remote phy */
1812 if (rc)
1813 return rc;
1814
1815 if (dev_is_sata(device)) {
1816 struct ata_link *link = &device->sata_dev.ap->link;
1817
1818 rc = ata_wait_after_reset(link, jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT,
1819 smp_ata_check_ready_type);
1820 } else {
1821 msleep(2000);
1822 }
1823
1824 return rc;
1825 }
1826
hisi_sas_I_T_nexus_reset(struct domain_device * device)1827 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1828 {
1829 struct hisi_sas_device *sas_dev = device->lldd_dev;
1830 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1831 struct device *dev = hisi_hba->dev;
1832 int rc;
1833
1834 if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
1835 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1836
1837 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1838 if (rc < 0) {
1839 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1840 return TMF_RESP_FUNC_FAILED;
1841 }
1842 hisi_sas_dereg_device(hisi_hba, device);
1843
1844 rc = hisi_sas_debug_I_T_nexus_reset(device);
1845 if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) {
1846 struct sas_phy *local_phy;
1847
1848 rc = hisi_sas_softreset_ata_disk(device);
1849 switch (rc) {
1850 case -ECOMM:
1851 rc = -ENODEV;
1852 break;
1853 case TMF_RESP_FUNC_FAILED:
1854 case -EMSGSIZE:
1855 case -EIO:
1856 local_phy = sas_get_local_phy(device);
1857 rc = sas_phy_enable(local_phy, 0);
1858 if (!rc) {
1859 local_phy->enabled = 0;
1860 dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n",
1861 SAS_ADDR(device->sas_addr), rc);
1862 rc = -ENODEV;
1863 }
1864 sas_put_local_phy(local_phy);
1865 break;
1866 default:
1867 break;
1868 }
1869 }
1870
1871 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1872 hisi_sas_release_task(hisi_hba, device);
1873
1874 return rc;
1875 }
1876
hisi_sas_lu_reset(struct domain_device * device,u8 * lun)1877 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1878 {
1879 struct hisi_sas_device *sas_dev = device->lldd_dev;
1880 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1881 struct device *dev = hisi_hba->dev;
1882 int rc = TMF_RESP_FUNC_FAILED;
1883
1884 /* Clear internal IO and then lu reset */
1885 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1886 if (rc < 0) {
1887 dev_err(dev, "lu_reset: internal abort failed\n");
1888 goto out;
1889 }
1890 hisi_sas_dereg_device(hisi_hba, device);
1891
1892 if (dev_is_sata(device)) {
1893 struct sas_phy *phy;
1894
1895 phy = sas_get_local_phy(device);
1896
1897 rc = sas_phy_reset(phy, true);
1898
1899 if (rc == 0)
1900 hisi_sas_release_task(hisi_hba, device);
1901 sas_put_local_phy(phy);
1902 } else {
1903 rc = sas_lu_reset(device, lun);
1904 if (rc == TMF_RESP_FUNC_COMPLETE)
1905 hisi_sas_release_task(hisi_hba, device);
1906 }
1907 out:
1908 if (rc != TMF_RESP_FUNC_COMPLETE)
1909 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1910 sas_dev->device_id, rc);
1911 return rc;
1912 }
1913
hisi_sas_async_I_T_nexus_reset(void * data,async_cookie_t cookie)1914 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1915 {
1916 struct domain_device *device = data;
1917 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1918 int rc;
1919
1920 rc = hisi_sas_debug_I_T_nexus_reset(device);
1921 if (rc != TMF_RESP_FUNC_COMPLETE)
1922 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1923 SAS_ADDR(device->sas_addr), rc);
1924 }
1925
hisi_sas_clear_nexus_ha(struct sas_ha_struct * sas_ha)1926 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1927 {
1928 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1929 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1930 ASYNC_DOMAIN_EXCLUSIVE(async);
1931 int i;
1932
1933 queue_work(hisi_hba->wq, &r.work);
1934 wait_for_completion(r.completion);
1935 if (!r.done)
1936 return TMF_RESP_FUNC_FAILED;
1937
1938 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1939 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1940 struct domain_device *device = sas_dev->sas_device;
1941
1942 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1943 dev_is_expander(device->dev_type))
1944 continue;
1945
1946 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1947 device, &async);
1948 }
1949
1950 async_synchronize_full_domain(&async);
1951 hisi_sas_release_tasks(hisi_hba);
1952
1953 return TMF_RESP_FUNC_COMPLETE;
1954 }
1955
hisi_sas_query_task(struct sas_task * task)1956 static int hisi_sas_query_task(struct sas_task *task)
1957 {
1958 int rc = TMF_RESP_FUNC_FAILED;
1959
1960 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1961 struct hisi_sas_slot *slot = task->lldd_task;
1962 u32 tag = slot->idx;
1963
1964 rc = sas_query_task(task, tag);
1965 switch (rc) {
1966 /* The task is still in Lun, release it then */
1967 case TMF_RESP_FUNC_SUCC:
1968 /* The task is not in Lun or failed, reset the phy */
1969 case TMF_RESP_FUNC_FAILED:
1970 case TMF_RESP_FUNC_COMPLETE:
1971 break;
1972 default:
1973 rc = TMF_RESP_FUNC_FAILED;
1974 break;
1975 }
1976 }
1977 return rc;
1978 }
1979
hisi_sas_internal_abort_timeout(struct sas_task * task,void * data)1980 static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
1981 void *data)
1982 {
1983 struct domain_device *device = task->dev;
1984 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1985 struct hisi_sas_internal_abort_data *timeout = data;
1986
1987 if (hisi_sas_debugfs_enable) {
1988 /*
1989 * If timeout occurs in device gone scenario, to avoid
1990 * circular dependency like:
1991 * hisi_sas_dev_gone() -> down() -> ... ->
1992 * hisi_sas_internal_abort_timeout() -> down().
1993 */
1994 if (!timeout->rst_ha_timeout)
1995 down(&hisi_hba->sem);
1996 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1997 if (!timeout->rst_ha_timeout)
1998 up(&hisi_hba->sem);
1999 }
2000
2001 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
2002 pr_err("Internal abort: timeout %016llx\n",
2003 SAS_ADDR(device->sas_addr));
2004 } else {
2005 struct hisi_sas_slot *slot = task->lldd_task;
2006
2007 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
2008
2009 if (slot) {
2010 struct hisi_sas_cq *cq =
2011 &hisi_hba->cq[slot->dlvry_queue];
2012 /*
2013 * sync irq or poll queue to avoid free'ing task
2014 * before using task in IO completion
2015 */
2016 hisi_sas_sync_cq(cq);
2017 slot->task = NULL;
2018 }
2019
2020 if (timeout->rst_ha_timeout) {
2021 pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n",
2022 SAS_ADDR(device->sas_addr));
2023 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2024 } else {
2025 pr_err("Internal abort: timeout and not done %016llx.\n",
2026 SAS_ADDR(device->sas_addr));
2027 }
2028
2029 return true;
2030 }
2031
2032 return false;
2033 }
2034
hisi_sas_port_formed(struct asd_sas_phy * sas_phy)2035 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2036 {
2037 hisi_sas_port_notify_formed(sas_phy);
2038 }
2039
hisi_sas_write_gpio(struct sas_ha_struct * sha,u8 reg_type,u8 reg_index,u8 reg_count,u8 * write_data)2040 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2041 u8 reg_index, u8 reg_count, u8 *write_data)
2042 {
2043 struct hisi_hba *hisi_hba = sha->lldd_ha;
2044
2045 if (!hisi_hba->hw->write_gpio)
2046 return -EOPNOTSUPP;
2047
2048 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2049 reg_index, reg_count, write_data);
2050 }
2051
hisi_sas_phy_disconnected(struct hisi_sas_phy * phy)2052 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2053 {
2054 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2055 struct sas_phy *sphy = sas_phy->phy;
2056 unsigned long flags;
2057
2058 phy->phy_attached = 0;
2059 phy->phy_type = 0;
2060 phy->port = NULL;
2061
2062 spin_lock_irqsave(&phy->lock, flags);
2063 if (phy->enable)
2064 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2065 else
2066 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2067 spin_unlock_irqrestore(&phy->lock, flags);
2068 }
2069
hisi_sas_phy_down(struct hisi_hba * hisi_hba,int phy_no,int rdy,gfp_t gfp_flags)2070 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2071 gfp_t gfp_flags)
2072 {
2073 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2074 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2075 struct device *dev = hisi_hba->dev;
2076
2077 if (rdy) {
2078 /* Phy down but ready */
2079 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2080 hisi_sas_port_notify_formed(sas_phy);
2081 } else {
2082 struct hisi_sas_port *port = phy->port;
2083
2084 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||
2085 phy->in_reset) {
2086 dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2087 return;
2088 }
2089 /* Phy down and not ready */
2090 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2091 sas_phy_disconnected(sas_phy);
2092
2093 if (port) {
2094 if (phy->phy_type & PORT_TYPE_SAS) {
2095 int port_id = port->id;
2096
2097 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2098 port_id))
2099 port->port_attached = 0;
2100 } else if (phy->phy_type & PORT_TYPE_SATA)
2101 port->port_attached = 0;
2102 }
2103 hisi_sas_phy_disconnected(phy);
2104 }
2105 }
2106 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2107
hisi_sas_phy_bcast(struct hisi_sas_phy * phy)2108 void hisi_sas_phy_bcast(struct hisi_sas_phy *phy)
2109 {
2110 struct asd_sas_phy *sas_phy = &phy->sas_phy;
2111 struct hisi_hba *hisi_hba = phy->hisi_hba;
2112
2113 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags))
2114 return;
2115
2116 sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC);
2117 }
2118 EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast);
2119
hisi_sas_host_reset(struct Scsi_Host * shost,int reset_type)2120 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2121 {
2122 struct hisi_hba *hisi_hba = shost_priv(shost);
2123
2124 if (reset_type != SCSI_ADAPTER_RESET)
2125 return -EOPNOTSUPP;
2126
2127 queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2128
2129 return 0;
2130 }
2131 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2132
2133 struct scsi_transport_template *hisi_sas_stt;
2134 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2135
2136 static struct sas_domain_function_template hisi_sas_transport_ops = {
2137 .lldd_dev_found = hisi_sas_dev_found,
2138 .lldd_dev_gone = hisi_sas_dev_gone,
2139 .lldd_execute_task = hisi_sas_queue_command,
2140 .lldd_control_phy = hisi_sas_control_phy,
2141 .lldd_abort_task = hisi_sas_abort_task,
2142 .lldd_abort_task_set = hisi_sas_abort_task_set,
2143 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
2144 .lldd_lu_reset = hisi_sas_lu_reset,
2145 .lldd_query_task = hisi_sas_query_task,
2146 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
2147 .lldd_port_formed = hisi_sas_port_formed,
2148 .lldd_write_gpio = hisi_sas_write_gpio,
2149 .lldd_tmf_aborted = hisi_sas_tmf_aborted,
2150 .lldd_abort_timeout = hisi_sas_internal_abort_timeout,
2151 };
2152
hisi_sas_init_mem(struct hisi_hba * hisi_hba)2153 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2154 {
2155 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2156 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2157
2158 for (i = 0; i < hisi_hba->queue_count; i++) {
2159 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2160 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2161 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2162
2163 s = sizeof(struct hisi_sas_cmd_hdr);
2164 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2165 memset(&cmd_hdr[j], 0, s);
2166
2167 dq->wr_point = 0;
2168
2169 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2170 memset(hisi_hba->complete_hdr[i], 0, s);
2171 cq->rd_point = 0;
2172 }
2173
2174 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2175 memset(hisi_hba->initial_fis, 0, s);
2176
2177 s = max_command_entries * sizeof(struct hisi_sas_iost);
2178 memset(hisi_hba->iost, 0, s);
2179
2180 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2181 memset(hisi_hba->breakpoint, 0, s);
2182
2183 s = sizeof(struct hisi_sas_sata_breakpoint);
2184 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2185 memset(&sata_breakpoint[j], 0, s);
2186 }
2187 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2188
hisi_sas_alloc(struct hisi_hba * hisi_hba)2189 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2190 {
2191 struct device *dev = hisi_hba->dev;
2192 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2193 int max_command_entries_ru, sz_slot_buf_ru;
2194 int blk_cnt, slots_per_blk;
2195
2196 sema_init(&hisi_hba->sem, 1);
2197 spin_lock_init(&hisi_hba->lock);
2198 for (i = 0; i < hisi_hba->n_phy; i++) {
2199 hisi_sas_phy_init(hisi_hba, i);
2200 hisi_hba->port[i].port_attached = 0;
2201 hisi_hba->port[i].id = -1;
2202 }
2203
2204 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2205 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2206 hisi_hba->devices[i].device_id = i;
2207 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2208 }
2209
2210 for (i = 0; i < hisi_hba->queue_count; i++) {
2211 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2212 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2213
2214 /* Completion queue structure */
2215 cq->id = i;
2216 cq->hisi_hba = hisi_hba;
2217 spin_lock_init(&cq->poll_lock);
2218
2219 /* Delivery queue structure */
2220 spin_lock_init(&dq->lock);
2221 INIT_LIST_HEAD(&dq->list);
2222 dq->id = i;
2223 dq->hisi_hba = hisi_hba;
2224
2225 /* Delivery queue */
2226 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2227 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2228 &hisi_hba->cmd_hdr_dma[i],
2229 GFP_KERNEL);
2230 if (!hisi_hba->cmd_hdr[i])
2231 goto err_out;
2232
2233 /* Completion queue */
2234 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2235 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2236 &hisi_hba->complete_hdr_dma[i],
2237 GFP_KERNEL);
2238 if (!hisi_hba->complete_hdr[i])
2239 goto err_out;
2240 }
2241
2242 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2243 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2244 GFP_KERNEL);
2245 if (!hisi_hba->itct)
2246 goto err_out;
2247
2248 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2249 sizeof(struct hisi_sas_slot),
2250 GFP_KERNEL);
2251 if (!hisi_hba->slot_info)
2252 goto err_out;
2253
2254 /* roundup to avoid overly large block size */
2255 max_command_entries_ru = roundup(max_command_entries, 64);
2256 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2257 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2258 else
2259 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2260 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2261 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2262 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2263 slots_per_blk = s / sz_slot_buf_ru;
2264
2265 for (i = 0; i < blk_cnt; i++) {
2266 int slot_index = i * slots_per_blk;
2267 dma_addr_t buf_dma;
2268 void *buf;
2269
2270 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2271 GFP_KERNEL);
2272 if (!buf)
2273 goto err_out;
2274
2275 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2276 struct hisi_sas_slot *slot;
2277
2278 slot = &hisi_hba->slot_info[slot_index];
2279 slot->buf = buf;
2280 slot->buf_dma = buf_dma;
2281 slot->idx = slot_index;
2282
2283 buf += sz_slot_buf_ru;
2284 buf_dma += sz_slot_buf_ru;
2285 }
2286 }
2287
2288 s = max_command_entries * sizeof(struct hisi_sas_iost);
2289 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2290 GFP_KERNEL);
2291 if (!hisi_hba->iost)
2292 goto err_out;
2293
2294 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2295 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2296 &hisi_hba->breakpoint_dma,
2297 GFP_KERNEL);
2298 if (!hisi_hba->breakpoint)
2299 goto err_out;
2300
2301 s = hisi_hba->slot_index_count = max_command_entries;
2302 hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);
2303 if (!hisi_hba->slot_index_tags)
2304 goto err_out;
2305
2306 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2307 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2308 &hisi_hba->initial_fis_dma,
2309 GFP_KERNEL);
2310 if (!hisi_hba->initial_fis)
2311 goto err_out;
2312
2313 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2314 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2315 &hisi_hba->sata_breakpoint_dma,
2316 GFP_KERNEL);
2317 if (!hisi_hba->sata_breakpoint)
2318 goto err_out;
2319
2320 hisi_hba->last_slot_index = 0;
2321
2322 hisi_hba->wq =
2323 alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, dev_name(dev));
2324 if (!hisi_hba->wq) {
2325 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2326 goto err_out;
2327 }
2328
2329 return 0;
2330 err_out:
2331 return -ENOMEM;
2332 }
2333 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2334
hisi_sas_free(struct hisi_hba * hisi_hba)2335 void hisi_sas_free(struct hisi_hba *hisi_hba)
2336 {
2337 int i;
2338
2339 for (i = 0; i < hisi_hba->n_phy; i++) {
2340 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2341
2342 del_timer_sync(&phy->timer);
2343 }
2344
2345 if (hisi_hba->wq)
2346 destroy_workqueue(hisi_hba->wq);
2347 }
2348 EXPORT_SYMBOL_GPL(hisi_sas_free);
2349
hisi_sas_rst_work_handler(struct work_struct * work)2350 void hisi_sas_rst_work_handler(struct work_struct *work)
2351 {
2352 struct hisi_hba *hisi_hba =
2353 container_of(work, struct hisi_hba, rst_work);
2354
2355 if (hisi_sas_controller_prereset(hisi_hba))
2356 return;
2357
2358 hisi_sas_controller_reset(hisi_hba);
2359 }
2360 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2361
hisi_sas_sync_rst_work_handler(struct work_struct * work)2362 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2363 {
2364 struct hisi_sas_rst *rst =
2365 container_of(work, struct hisi_sas_rst, work);
2366
2367 if (hisi_sas_controller_prereset(rst->hisi_hba))
2368 goto rst_complete;
2369
2370 if (!hisi_sas_controller_reset(rst->hisi_hba))
2371 rst->done = true;
2372 rst_complete:
2373 complete(rst->completion);
2374 }
2375 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2376
hisi_sas_get_fw_info(struct hisi_hba * hisi_hba)2377 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2378 {
2379 struct device *dev = hisi_hba->dev;
2380 struct platform_device *pdev = hisi_hba->platform_dev;
2381 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2382 struct clk *refclk;
2383
2384 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2385 SAS_ADDR_SIZE)) {
2386 dev_err(dev, "could not get property sas-addr\n");
2387 return -ENOENT;
2388 }
2389
2390 if (np) {
2391 /*
2392 * These properties are only required for platform device-based
2393 * controller with DT firmware.
2394 */
2395 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2396 "hisilicon,sas-syscon");
2397 if (IS_ERR(hisi_hba->ctrl)) {
2398 dev_err(dev, "could not get syscon\n");
2399 return -ENOENT;
2400 }
2401
2402 if (device_property_read_u32(dev, "ctrl-reset-reg",
2403 &hisi_hba->ctrl_reset_reg)) {
2404 dev_err(dev, "could not get property ctrl-reset-reg\n");
2405 return -ENOENT;
2406 }
2407
2408 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2409 &hisi_hba->ctrl_reset_sts_reg)) {
2410 dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2411 return -ENOENT;
2412 }
2413
2414 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2415 &hisi_hba->ctrl_clock_ena_reg)) {
2416 dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2417 return -ENOENT;
2418 }
2419 }
2420
2421 refclk = devm_clk_get(dev, NULL);
2422 if (IS_ERR(refclk))
2423 dev_dbg(dev, "no ref clk property\n");
2424 else
2425 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2426
2427 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2428 dev_err(dev, "could not get property phy-count\n");
2429 return -ENOENT;
2430 }
2431
2432 if (device_property_read_u32(dev, "queue-count",
2433 &hisi_hba->queue_count)) {
2434 dev_err(dev, "could not get property queue-count\n");
2435 return -ENOENT;
2436 }
2437
2438 return 0;
2439 }
2440 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2441
hisi_sas_shost_alloc(struct platform_device * pdev,const struct hisi_sas_hw * hw)2442 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2443 const struct hisi_sas_hw *hw)
2444 {
2445 struct resource *res;
2446 struct Scsi_Host *shost;
2447 struct hisi_hba *hisi_hba;
2448 struct device *dev = &pdev->dev;
2449 int error;
2450
2451 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2452 if (!shost) {
2453 dev_err(dev, "scsi host alloc failed\n");
2454 return NULL;
2455 }
2456 hisi_hba = shost_priv(shost);
2457
2458 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2459 hisi_hba->hw = hw;
2460 hisi_hba->dev = dev;
2461 hisi_hba->platform_dev = pdev;
2462 hisi_hba->shost = shost;
2463 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2464
2465 timer_setup(&hisi_hba->timer, NULL, 0);
2466
2467 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2468 goto err_out;
2469
2470 if (hisi_hba->hw->fw_info_check) {
2471 if (hisi_hba->hw->fw_info_check(hisi_hba))
2472 goto err_out;
2473 }
2474
2475 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2476 if (error) {
2477 dev_err(dev, "No usable DMA addressing method\n");
2478 goto err_out;
2479 }
2480
2481 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2482 if (IS_ERR(hisi_hba->regs))
2483 goto err_out;
2484
2485 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2486 if (res) {
2487 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2488 if (IS_ERR(hisi_hba->sgpio_regs))
2489 goto err_out;
2490 }
2491
2492 if (hisi_sas_alloc(hisi_hba)) {
2493 hisi_sas_free(hisi_hba);
2494 goto err_out;
2495 }
2496
2497 return shost;
2498 err_out:
2499 scsi_host_put(shost);
2500 dev_err(dev, "shost alloc failed\n");
2501 return NULL;
2502 }
2503
hisi_sas_interrupt_preinit(struct hisi_hba * hisi_hba)2504 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2505 {
2506 if (hisi_hba->hw->interrupt_preinit)
2507 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2508 return 0;
2509 }
2510
hisi_sas_probe(struct platform_device * pdev,const struct hisi_sas_hw * hw)2511 int hisi_sas_probe(struct platform_device *pdev,
2512 const struct hisi_sas_hw *hw)
2513 {
2514 struct Scsi_Host *shost;
2515 struct hisi_hba *hisi_hba;
2516 struct device *dev = &pdev->dev;
2517 struct asd_sas_phy **arr_phy;
2518 struct asd_sas_port **arr_port;
2519 struct sas_ha_struct *sha;
2520 int rc, phy_nr, port_nr, i;
2521
2522 shost = hisi_sas_shost_alloc(pdev, hw);
2523 if (!shost)
2524 return -ENOMEM;
2525
2526 sha = SHOST_TO_SAS_HA(shost);
2527 hisi_hba = shost_priv(shost);
2528 platform_set_drvdata(pdev, sha);
2529
2530 phy_nr = port_nr = hisi_hba->n_phy;
2531
2532 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2533 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2534 if (!arr_phy || !arr_port) {
2535 rc = -ENOMEM;
2536 goto err_out_ha;
2537 }
2538
2539 sha->sas_phy = arr_phy;
2540 sha->sas_port = arr_port;
2541 sha->lldd_ha = hisi_hba;
2542
2543 shost->transportt = hisi_sas_stt;
2544 shost->max_id = HISI_SAS_MAX_DEVICES;
2545 shost->max_lun = ~0;
2546 shost->max_channel = 1;
2547 shost->max_cmd_len = 16;
2548 if (hisi_hba->hw->slot_index_alloc) {
2549 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2550 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2551 } else {
2552 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2553 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2554 }
2555
2556 sha->sas_ha_name = DRV_NAME;
2557 sha->dev = hisi_hba->dev;
2558 sha->sas_addr = &hisi_hba->sas_addr[0];
2559 sha->num_phys = hisi_hba->n_phy;
2560 sha->shost = hisi_hba->shost;
2561
2562 for (i = 0; i < hisi_hba->n_phy; i++) {
2563 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2564 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2565 }
2566
2567 rc = hisi_sas_interrupt_preinit(hisi_hba);
2568 if (rc)
2569 goto err_out_ha;
2570
2571 rc = scsi_add_host(shost, &pdev->dev);
2572 if (rc)
2573 goto err_out_ha;
2574
2575 rc = sas_register_ha(sha);
2576 if (rc)
2577 goto err_out_register_ha;
2578
2579 rc = hisi_hba->hw->hw_init(hisi_hba);
2580 if (rc)
2581 goto err_out_hw_init;
2582
2583 scsi_scan_host(shost);
2584
2585 return 0;
2586
2587 err_out_hw_init:
2588 sas_unregister_ha(sha);
2589 err_out_register_ha:
2590 scsi_remove_host(shost);
2591 err_out_ha:
2592 hisi_sas_free(hisi_hba);
2593 scsi_host_put(shost);
2594 return rc;
2595 }
2596 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2597
hisi_sas_remove(struct platform_device * pdev)2598 void hisi_sas_remove(struct platform_device *pdev)
2599 {
2600 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2601 struct hisi_hba *hisi_hba = sha->lldd_ha;
2602 struct Scsi_Host *shost = sha->shost;
2603
2604 del_timer_sync(&hisi_hba->timer);
2605
2606 sas_unregister_ha(sha);
2607 sas_remove_host(shost);
2608
2609 hisi_sas_free(hisi_hba);
2610 scsi_host_put(shost);
2611 }
2612 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2613
2614 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2615 #define DEBUGFS_ENABLE_DEFAULT "enabled"
2616 bool hisi_sas_debugfs_enable = true;
2617 u32 hisi_sas_debugfs_dump_count = 50;
2618 #else
2619 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2620 bool hisi_sas_debugfs_enable;
2621 u32 hisi_sas_debugfs_dump_count = 1;
2622 #endif
2623
2624 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2625 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2626 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2627 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2628
2629 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2630 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2631 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2632
2633 struct dentry *hisi_sas_debugfs_dir;
2634 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2635
hisi_sas_init(void)2636 static __init int hisi_sas_init(void)
2637 {
2638 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2639 if (!hisi_sas_stt)
2640 return -ENOMEM;
2641
2642 if (hisi_sas_debugfs_enable) {
2643 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2644 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2645 pr_info("hisi_sas: Limiting debugfs dump count\n");
2646 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2647 }
2648 }
2649
2650 return 0;
2651 }
2652
hisi_sas_exit(void)2653 static __exit void hisi_sas_exit(void)
2654 {
2655 if (hisi_sas_debugfs_enable)
2656 debugfs_remove(hisi_sas_debugfs_dir);
2657
2658 sas_release_transport(hisi_sas_stt);
2659 }
2660
2661 module_init(hisi_sas_init);
2662 module_exit(hisi_sas_exit);
2663
2664 MODULE_LICENSE("GPL");
2665 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2666 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2667 MODULE_ALIAS("platform:" DRV_NAME);
2668