1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (c) 2015 Linaro Ltd. |
4 | * Copyright (c) 2015 Hisilicon Limited. |
5 | */ |
6 | |
7 | #include "hisi_sas.h" |
8 | #define DRV_NAME "hisi_sas" |
9 | |
10 | #define DEV_IS_GONE(dev) \ |
11 | ((!dev) || (dev->dev_type == SAS_PHY_UNUSED)) |
12 | |
13 | static int hisi_sas_softreset_ata_disk(struct domain_device *device); |
14 | static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func, |
15 | void *funcdata); |
16 | static void hisi_sas_release_task(struct hisi_hba *hisi_hba, |
17 | struct domain_device *device); |
18 | static void hisi_sas_dev_gone(struct domain_device *device); |
19 | |
20 | struct hisi_sas_internal_abort_data { |
21 | bool rst_ha_timeout; /* reset the HA for timeout */ |
22 | }; |
23 | |
24 | u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction) |
25 | { |
26 | switch (fis->command) { |
27 | case ATA_CMD_FPDMA_WRITE: |
28 | case ATA_CMD_FPDMA_READ: |
29 | case ATA_CMD_FPDMA_RECV: |
30 | case ATA_CMD_FPDMA_SEND: |
31 | case ATA_CMD_NCQ_NON_DATA: |
32 | return HISI_SAS_SATA_PROTOCOL_FPDMA; |
33 | |
34 | case ATA_CMD_DOWNLOAD_MICRO: |
35 | case ATA_CMD_ID_ATA: |
36 | case ATA_CMD_PMP_READ: |
37 | case ATA_CMD_READ_LOG_EXT: |
38 | case ATA_CMD_PIO_READ: |
39 | case ATA_CMD_PIO_READ_EXT: |
40 | case ATA_CMD_PMP_WRITE: |
41 | case ATA_CMD_WRITE_LOG_EXT: |
42 | case ATA_CMD_PIO_WRITE: |
43 | case ATA_CMD_PIO_WRITE_EXT: |
44 | return HISI_SAS_SATA_PROTOCOL_PIO; |
45 | |
46 | case ATA_CMD_DSM: |
47 | case ATA_CMD_DOWNLOAD_MICRO_DMA: |
48 | case ATA_CMD_PMP_READ_DMA: |
49 | case ATA_CMD_PMP_WRITE_DMA: |
50 | case ATA_CMD_READ: |
51 | case ATA_CMD_READ_EXT: |
52 | case ATA_CMD_READ_LOG_DMA_EXT: |
53 | case ATA_CMD_READ_STREAM_DMA_EXT: |
54 | case ATA_CMD_TRUSTED_RCV_DMA: |
55 | case ATA_CMD_TRUSTED_SND_DMA: |
56 | case ATA_CMD_WRITE: |
57 | case ATA_CMD_WRITE_EXT: |
58 | case ATA_CMD_WRITE_FUA_EXT: |
59 | case ATA_CMD_WRITE_QUEUED: |
60 | case ATA_CMD_WRITE_LOG_DMA_EXT: |
61 | case ATA_CMD_WRITE_STREAM_DMA_EXT: |
62 | case ATA_CMD_ZAC_MGMT_IN: |
63 | return HISI_SAS_SATA_PROTOCOL_DMA; |
64 | |
65 | case ATA_CMD_CHK_POWER: |
66 | case ATA_CMD_DEV_RESET: |
67 | case ATA_CMD_EDD: |
68 | case ATA_CMD_FLUSH: |
69 | case ATA_CMD_FLUSH_EXT: |
70 | case ATA_CMD_VERIFY: |
71 | case ATA_CMD_VERIFY_EXT: |
72 | case ATA_CMD_SET_FEATURES: |
73 | case ATA_CMD_STANDBY: |
74 | case ATA_CMD_STANDBYNOW1: |
75 | case ATA_CMD_ZAC_MGMT_OUT: |
76 | return HISI_SAS_SATA_PROTOCOL_NONDATA; |
77 | |
78 | case ATA_CMD_SET_MAX: |
79 | switch (fis->features) { |
80 | case ATA_SET_MAX_PASSWD: |
81 | case ATA_SET_MAX_LOCK: |
82 | return HISI_SAS_SATA_PROTOCOL_PIO; |
83 | |
84 | case ATA_SET_MAX_PASSWD_DMA: |
85 | case ATA_SET_MAX_UNLOCK_DMA: |
86 | return HISI_SAS_SATA_PROTOCOL_DMA; |
87 | |
88 | default: |
89 | return HISI_SAS_SATA_PROTOCOL_NONDATA; |
90 | } |
91 | |
92 | default: |
93 | { |
94 | if (direction == DMA_NONE) |
95 | return HISI_SAS_SATA_PROTOCOL_NONDATA; |
96 | return HISI_SAS_SATA_PROTOCOL_PIO; |
97 | } |
98 | } |
99 | } |
100 | EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol); |
101 | |
102 | void hisi_sas_sata_done(struct sas_task *task, |
103 | struct hisi_sas_slot *slot) |
104 | { |
105 | struct task_status_struct *ts = &task->task_status; |
106 | struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf; |
107 | struct hisi_sas_status_buffer *status_buf = |
108 | hisi_sas_status_buf_addr_mem(slot); |
109 | u8 *iu = &status_buf->iu[0]; |
110 | struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu; |
111 | |
112 | resp->frame_len = sizeof(struct dev_to_host_fis); |
113 | memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis)); |
114 | |
115 | ts->buf_valid_size = sizeof(*resp); |
116 | } |
117 | EXPORT_SYMBOL_GPL(hisi_sas_sata_done); |
118 | |
119 | /* |
120 | * This function assumes linkrate mask fits in 8 bits, which it |
121 | * does for all HW versions supported. |
122 | */ |
123 | u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max) |
124 | { |
125 | u8 rate = 0; |
126 | int i; |
127 | |
128 | max -= SAS_LINK_RATE_1_5_GBPS; |
129 | for (i = 0; i <= max; i++) |
130 | rate |= 1 << (i * 2); |
131 | return rate; |
132 | } |
133 | EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask); |
134 | |
135 | static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device) |
136 | { |
137 | return device->port->ha->lldd_ha; |
138 | } |
139 | |
140 | struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port) |
141 | { |
142 | return container_of(sas_port, struct hisi_sas_port, sas_port); |
143 | } |
144 | EXPORT_SYMBOL_GPL(to_hisi_sas_port); |
145 | |
146 | void hisi_sas_stop_phys(struct hisi_hba *hisi_hba) |
147 | { |
148 | int phy_no; |
149 | |
150 | for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) |
151 | hisi_sas_phy_enable(hisi_hba, phy_no, enable: 0); |
152 | } |
153 | EXPORT_SYMBOL_GPL(hisi_sas_stop_phys); |
154 | |
155 | static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx) |
156 | { |
157 | void *bitmap = hisi_hba->slot_index_tags; |
158 | |
159 | __clear_bit(slot_idx, bitmap); |
160 | } |
161 | |
162 | static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx) |
163 | { |
164 | if (hisi_hba->hw->slot_index_alloc || |
165 | slot_idx < HISI_SAS_RESERVED_IPTT) { |
166 | spin_lock(lock: &hisi_hba->lock); |
167 | hisi_sas_slot_index_clear(hisi_hba, slot_idx); |
168 | spin_unlock(lock: &hisi_hba->lock); |
169 | } |
170 | } |
171 | |
172 | static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx) |
173 | { |
174 | void *bitmap = hisi_hba->slot_index_tags; |
175 | |
176 | __set_bit(slot_idx, bitmap); |
177 | } |
178 | |
179 | static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, |
180 | struct request *rq) |
181 | { |
182 | int index; |
183 | void *bitmap = hisi_hba->slot_index_tags; |
184 | |
185 | if (rq) |
186 | return rq->tag + HISI_SAS_RESERVED_IPTT; |
187 | |
188 | spin_lock(lock: &hisi_hba->lock); |
189 | index = find_next_zero_bit(addr: bitmap, HISI_SAS_RESERVED_IPTT, |
190 | offset: hisi_hba->last_slot_index + 1); |
191 | if (index >= HISI_SAS_RESERVED_IPTT) { |
192 | index = find_next_zero_bit(addr: bitmap, |
193 | HISI_SAS_RESERVED_IPTT, |
194 | offset: 0); |
195 | if (index >= HISI_SAS_RESERVED_IPTT) { |
196 | spin_unlock(lock: &hisi_hba->lock); |
197 | return -SAS_QUEUE_FULL; |
198 | } |
199 | } |
200 | hisi_sas_slot_index_set(hisi_hba, slot_idx: index); |
201 | hisi_hba->last_slot_index = index; |
202 | spin_unlock(lock: &hisi_hba->lock); |
203 | |
204 | return index; |
205 | } |
206 | |
207 | void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task, |
208 | struct hisi_sas_slot *slot, 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(proto: 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(lock: &sas_dev->lock); |
244 | list_del_init(entry: &slot->entry); |
245 | spin_unlock(lock: &sas_dev->lock); |
246 | } else { |
247 | list_del_init(entry: &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: slot->idx); |
253 | } |
254 | EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free); |
255 | |
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 | |
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 | |
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 | |
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 | |
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(proto: 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 | |
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(proto: 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: *n_elem); |
340 | prep_out: |
341 | return rc; |
342 | } |
343 | |
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 | |
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(cmd: 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 |
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(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(new: &slot->delivery, head: &dq->list); |
412 | spin_unlock(lock: &dq->lock); |
413 | spin_lock(lock: &sas_dev->lock); |
414 | list_add_tail(new: &slot->entry, head: &sas_dev->list); |
415 | spin_unlock(lock: &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(lock: &dq->lock); |
457 | hisi_hba->hw->start_delivery(dq); |
458 | spin_unlock(lock: &dq->lock); |
459 | } |
460 | |
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(sem: &hisi_hba->sem); |
504 | up(sem: &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(unique_tag: 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: &n_elem); |
576 | if (rc < 0) |
577 | goto prep_out; |
578 | |
579 | if (!sas_protocol_ata(proto: task->task_proto)) { |
580 | rc = hisi_sas_dif_dma_map(hisi_hba, n_elem_dif: &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(proto: 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 | |
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(phy: sas_phy, event: 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(phy: sas_phy, event: PORTE_BYTES_DMAED, gfp_flags); |
655 | } |
656 | |
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(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(list: &hisi_hba->devices[i].list); |
680 | break; |
681 | } |
682 | i++; |
683 | } |
684 | hisi_hba->last_dev_id = i; |
685 | spin_unlock(lock: &hisi_hba->lock); |
686 | |
687 | return sas_dev; |
688 | } |
689 | |
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(lock: &cq->poll_lock); |
694 | spin_unlock(lock: &cq->poll_lock); |
695 | } |
696 | |
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 | |
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(irq: cq->irq_no); |
712 | } |
713 | |
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 | |
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 | |
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 |
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(dev: device, lun: 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 | |
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(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 | |
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(type: parent_dev->dev_type)) { |
848 | int phy_no; |
849 | |
850 | phy_no = sas_find_attached_phy_id(ex_dev: &parent_dev->ex_dev, 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 | |
871 | int hisi_sas_slave_configure(struct scsi_device *sdev) |
872 | { |
873 | struct domain_device *dev = sdev_to_domain_dev(sdev); |
874 | int ret = sas_slave_configure(sdev); |
875 | |
876 | if (ret) |
877 | return ret; |
878 | if (!dev_is_sata(dev)) |
879 | sas_change_queue_depth(sdev, new_depth: 64); |
880 | |
881 | return 0; |
882 | } |
883 | EXPORT_SYMBOL_GPL(hisi_sas_slave_configure); |
884 | |
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 | |
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(ha: sha); |
903 | return 1; |
904 | } |
905 | EXPORT_SYMBOL_GPL(hisi_sas_scan_finished); |
906 | |
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 | |
922 | static void hisi_sas_phyup_work(struct work_struct *work) |
923 | { |
924 | hisi_sas_phyup_work_common(work, event: HISI_PHYE_PHY_UP); |
925 | } |
926 | |
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, func: PHY_FUNC_LINK_RESET, NULL); |
934 | } |
935 | |
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, event: 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 | |
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(wq: hisi_hba->wq, work: &phy->works[event]); |
962 | } |
963 | EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event); |
964 | |
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 | |
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(lock: &phy->lock, flags); |
988 | return; |
989 | } |
990 | |
991 | if (!timer_pending(timer: &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(timer: &phy->timer); |
997 | spin_unlock_irqrestore(lock: &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(lock: &phy->lock, flags); |
1006 | } |
1007 | |
1008 | EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready); |
1009 | |
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 */ |
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(lock: &phy->lock, flags); |
1061 | } |
1062 | EXPORT_SYMBOL_GPL(hisi_sas_phy_enable); |
1063 | |
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 | |
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(lock: &task->task_state_lock, flags); |
1096 | } |
1097 | |
1098 | hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock); |
1099 | } |
1100 | |
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(lock: &sas_dev->lock); |
1108 | list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry) |
1109 | hisi_sas_do_release_task(hisi_hba, task: slot->task, slot, need_lock: false); |
1110 | |
1111 | spin_unlock(lock: &sas_dev->lock); |
1112 | } |
1113 | |
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 | |
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 |
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, src2p: mask)) |
1154 | continue; |
1155 | rc = sas_execute_internal_abort_dev(device, qid: i, data: &data); |
1156 | if (rc) |
1157 | return rc; |
1158 | } |
1159 | |
1160 | return 0; |
1161 | } |
1162 | |
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(sem: &hisi_hba->sem); |
1174 | if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) { |
1175 | hisi_sas_internal_task_abort_dev(sas_dev, rst_ha_timeout: 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(sem: &hisi_hba->sem); |
1191 | } |
1192 | |
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(msecs: 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 | |
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(sem: &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(msecs: 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, r: 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(x: &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(sem: &hisi_hba->sem); |
1287 | return ret; |
1288 | } |
1289 | |
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: &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: &tf, pmp, is_cmd: 0, fis); |
1302 | } |
1303 | |
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(dev: link->device, reset: 1, pmp, fis); |
1317 | rc = sas_execute_ata_cmd(device, fis, force_phy_id: -1); |
1318 | if (rc != TMF_RESP_FUNC_COMPLETE) |
1319 | break; |
1320 | } |
1321 | |
1322 | if (rc == TMF_RESP_FUNC_COMPLETE) { |
1323 | ata_for_each_link(link, ap, EDGE) { |
1324 | int pmp = sata_srst_pmp(link); |
1325 | |
1326 | hisi_sas_fill_ata_reset_cmd(dev: link->device, reset: 0, pmp, fis); |
1327 | rc = sas_execute_ata_cmd(device, fis, force_phy_id: -1); |
1328 | if (rc != TMF_RESP_FUNC_COMPLETE) |
1329 | dev_err(dev, "ata disk %016llx de-reset failed\n" , |
1330 | SAS_ADDR(device->sas_addr)); |
1331 | } |
1332 | } else { |
1333 | dev_err(dev, "ata disk %016llx reset failed\n" , |
1334 | SAS_ADDR(device->sas_addr)); |
1335 | } |
1336 | |
1337 | if (rc == TMF_RESP_FUNC_COMPLETE) |
1338 | hisi_sas_release_task(hisi_hba, device); |
1339 | |
1340 | return rc; |
1341 | } |
1342 | |
1343 | static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba) |
1344 | { |
1345 | u32 state = hisi_hba->hw->get_phys_state(hisi_hba); |
1346 | int i; |
1347 | |
1348 | for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { |
1349 | struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; |
1350 | struct domain_device *device = sas_dev->sas_device; |
1351 | struct asd_sas_port *sas_port; |
1352 | struct hisi_sas_port *port; |
1353 | struct hisi_sas_phy *phy = NULL; |
1354 | struct asd_sas_phy *sas_phy; |
1355 | |
1356 | if ((sas_dev->dev_type == SAS_PHY_UNUSED) |
1357 | || !device || !device->port) |
1358 | continue; |
1359 | |
1360 | sas_port = device->port; |
1361 | port = to_hisi_sas_port(sas_port); |
1362 | |
1363 | spin_lock(lock: &sas_port->phy_list_lock); |
1364 | list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) |
1365 | if (state & BIT(sas_phy->id)) { |
1366 | phy = sas_phy->lldd_phy; |
1367 | break; |
1368 | } |
1369 | spin_unlock(lock: &sas_port->phy_list_lock); |
1370 | |
1371 | if (phy) { |
1372 | port->id = phy->port_id; |
1373 | |
1374 | /* Update linkrate of directly attached device. */ |
1375 | if (!device->parent) |
1376 | device->linkrate = phy->sas_phy.linkrate; |
1377 | |
1378 | hisi_hba->hw->setup_itct(hisi_hba, sas_dev); |
1379 | } else if (!port->port_attached) |
1380 | port->id = 0xff; |
1381 | } |
1382 | } |
1383 | |
1384 | static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state) |
1385 | { |
1386 | struct asd_sas_port *_sas_port = NULL; |
1387 | int phy_no; |
1388 | |
1389 | for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) { |
1390 | struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; |
1391 | struct asd_sas_phy *sas_phy = &phy->sas_phy; |
1392 | struct asd_sas_port *sas_port = sas_phy->port; |
1393 | bool do_port_check = _sas_port != sas_port; |
1394 | |
1395 | if (!sas_phy->phy->enabled) |
1396 | continue; |
1397 | |
1398 | /* Report PHY state change to libsas */ |
1399 | if (state & BIT(phy_no)) { |
1400 | if (do_port_check && sas_port && sas_port->port_dev) { |
1401 | struct domain_device *dev = sas_port->port_dev; |
1402 | |
1403 | _sas_port = sas_port; |
1404 | |
1405 | if (dev_is_expander(type: dev->dev_type)) |
1406 | sas_notify_port_event(phy: sas_phy, |
1407 | event: PORTE_BROADCAST_RCVD, |
1408 | GFP_KERNEL); |
1409 | } |
1410 | } else { |
1411 | hisi_sas_phy_down(hisi_hba, phy_no, rdy: 0, GFP_KERNEL); |
1412 | } |
1413 | } |
1414 | } |
1415 | |
1416 | static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba) |
1417 | { |
1418 | struct hisi_sas_device *sas_dev; |
1419 | struct domain_device *device; |
1420 | int i; |
1421 | |
1422 | for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { |
1423 | sas_dev = &hisi_hba->devices[i]; |
1424 | device = sas_dev->sas_device; |
1425 | |
1426 | if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device) |
1427 | continue; |
1428 | |
1429 | hisi_sas_init_device(device); |
1430 | } |
1431 | } |
1432 | |
1433 | static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba, |
1434 | struct asd_sas_port *sas_port, |
1435 | struct domain_device *device) |
1436 | { |
1437 | struct ata_port *ap = device->sata_dev.ap; |
1438 | struct device *dev = hisi_hba->dev; |
1439 | int rc = TMF_RESP_FUNC_FAILED; |
1440 | struct ata_link *link; |
1441 | u8 fis[20] = {0}; |
1442 | int i; |
1443 | |
1444 | for (i = 0; i < hisi_hba->n_phy; i++) { |
1445 | if (!(sas_port->phy_mask & BIT(i))) |
1446 | continue; |
1447 | |
1448 | ata_for_each_link(link, ap, EDGE) { |
1449 | int pmp = sata_srst_pmp(link); |
1450 | |
1451 | hisi_sas_fill_ata_reset_cmd(dev: link->device, reset: 1, pmp, fis); |
1452 | rc = sas_execute_ata_cmd(device, fis, force_phy_id: i); |
1453 | if (rc != TMF_RESP_FUNC_COMPLETE) { |
1454 | dev_err(dev, "phy%d ata reset failed rc=%d\n" , |
1455 | i, rc); |
1456 | break; |
1457 | } |
1458 | } |
1459 | } |
1460 | } |
1461 | |
1462 | static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba) |
1463 | { |
1464 | struct device *dev = hisi_hba->dev; |
1465 | int port_no, rc, i; |
1466 | |
1467 | for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { |
1468 | struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; |
1469 | struct domain_device *device = sas_dev->sas_device; |
1470 | |
1471 | if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device) |
1472 | continue; |
1473 | |
1474 | rc = hisi_sas_internal_task_abort_dev(sas_dev, rst_ha_timeout: false); |
1475 | if (rc < 0) |
1476 | dev_err(dev, "STP reject: abort dev failed %d\n" , rc); |
1477 | } |
1478 | |
1479 | for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) { |
1480 | struct hisi_sas_port *port = &hisi_hba->port[port_no]; |
1481 | struct asd_sas_port *sas_port = &port->sas_port; |
1482 | struct domain_device *port_dev = sas_port->port_dev; |
1483 | struct domain_device *device; |
1484 | |
1485 | if (!port_dev || !dev_is_expander(type: port_dev->dev_type)) |
1486 | continue; |
1487 | |
1488 | /* Try to find a SATA device */ |
1489 | list_for_each_entry(device, &sas_port->dev_list, |
1490 | dev_list_node) { |
1491 | if (dev_is_sata(dev: device)) { |
1492 | hisi_sas_send_ata_reset_each_phy(hisi_hba, |
1493 | sas_port, |
1494 | device); |
1495 | break; |
1496 | } |
1497 | } |
1498 | } |
1499 | } |
1500 | |
1501 | void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba) |
1502 | { |
1503 | struct Scsi_Host *shost = hisi_hba->shost; |
1504 | |
1505 | hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba); |
1506 | |
1507 | scsi_block_requests(shost); |
1508 | hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000); |
1509 | |
1510 | del_timer_sync(timer: &hisi_hba->timer); |
1511 | |
1512 | set_bit(HISI_SAS_REJECT_CMD_BIT, addr: &hisi_hba->flags); |
1513 | } |
1514 | EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare); |
1515 | |
1516 | static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie) |
1517 | { |
1518 | struct hisi_sas_phy *phy = data; |
1519 | struct hisi_hba *hisi_hba = phy->hisi_hba; |
1520 | struct device *dev = hisi_hba->dev; |
1521 | DECLARE_COMPLETION_ONSTACK(completion); |
1522 | int phy_no = phy->sas_phy.id; |
1523 | |
1524 | phy->reset_completion = &completion; |
1525 | hisi_sas_phy_enable(hisi_hba, phy_no, 1); |
1526 | if (!wait_for_completion_timeout(x: &completion, |
1527 | HISI_SAS_WAIT_PHYUP_TIMEOUT)) |
1528 | dev_warn(dev, "phy%d wait phyup timed out\n" , phy_no); |
1529 | |
1530 | phy->reset_completion = NULL; |
1531 | } |
1532 | |
1533 | void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba) |
1534 | { |
1535 | struct Scsi_Host *shost = hisi_hba->shost; |
1536 | ASYNC_DOMAIN_EXCLUSIVE(async); |
1537 | int phy_no; |
1538 | |
1539 | /* Init and wait for PHYs to come up and all libsas event finished. */ |
1540 | for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) { |
1541 | struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; |
1542 | |
1543 | if (!(hisi_hba->phy_state & BIT(phy_no))) |
1544 | continue; |
1545 | |
1546 | async_schedule_domain(func: hisi_sas_async_init_wait_phyup, |
1547 | data: phy, domain: &async); |
1548 | } |
1549 | |
1550 | async_synchronize_full_domain(domain: &async); |
1551 | hisi_sas_refresh_port_id(hisi_hba); |
1552 | clear_bit(HISI_SAS_REJECT_CMD_BIT, addr: &hisi_hba->flags); |
1553 | |
1554 | if (hisi_hba->reject_stp_links_msk) |
1555 | hisi_sas_terminate_stp_reject(hisi_hba); |
1556 | hisi_sas_reset_init_all_devices(hisi_hba); |
1557 | scsi_unblock_requests(shost); |
1558 | clear_bit(HISI_SAS_RESETTING_BIT, addr: &hisi_hba->flags); |
1559 | up(sem: &hisi_hba->sem); |
1560 | |
1561 | hisi_sas_rescan_topology(hisi_hba, state: hisi_hba->phy_state); |
1562 | } |
1563 | EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done); |
1564 | |
1565 | static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba) |
1566 | { |
1567 | if (!hisi_hba->hw->soft_reset) |
1568 | return -1; |
1569 | |
1570 | down(sem: &hisi_hba->sem); |
1571 | if (test_and_set_bit(HISI_SAS_RESETTING_BIT, addr: &hisi_hba->flags)) { |
1572 | up(sem: &hisi_hba->sem); |
1573 | return -1; |
1574 | } |
1575 | |
1576 | if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct) |
1577 | hisi_hba->hw->debugfs_snapshot_regs(hisi_hba); |
1578 | |
1579 | return 0; |
1580 | } |
1581 | |
1582 | static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba) |
1583 | { |
1584 | struct device *dev = hisi_hba->dev; |
1585 | struct Scsi_Host *shost = hisi_hba->shost; |
1586 | int rc; |
1587 | |
1588 | dev_info(dev, "controller resetting...\n" ); |
1589 | hisi_sas_controller_reset_prepare(hisi_hba); |
1590 | |
1591 | rc = hisi_hba->hw->soft_reset(hisi_hba); |
1592 | if (rc) { |
1593 | dev_warn(dev, "controller reset failed (%d)\n" , rc); |
1594 | clear_bit(HISI_SAS_REJECT_CMD_BIT, addr: &hisi_hba->flags); |
1595 | up(sem: &hisi_hba->sem); |
1596 | scsi_unblock_requests(shost); |
1597 | clear_bit(HISI_SAS_RESETTING_BIT, addr: &hisi_hba->flags); |
1598 | return rc; |
1599 | } |
1600 | clear_bit(HISI_SAS_HW_FAULT_BIT, addr: &hisi_hba->flags); |
1601 | |
1602 | hisi_sas_controller_reset_done(hisi_hba); |
1603 | dev_info(dev, "controller reset complete\n" ); |
1604 | |
1605 | return 0; |
1606 | } |
1607 | |
1608 | static int hisi_sas_abort_task(struct sas_task *task) |
1609 | { |
1610 | struct hisi_sas_internal_abort_data internal_abort_data = { false }; |
1611 | struct domain_device *device = task->dev; |
1612 | struct hisi_sas_device *sas_dev = device->lldd_dev; |
1613 | struct hisi_sas_slot *slot = task->lldd_task; |
1614 | struct hisi_hba *hisi_hba; |
1615 | struct device *dev; |
1616 | int rc = TMF_RESP_FUNC_FAILED; |
1617 | unsigned long flags; |
1618 | |
1619 | if (!sas_dev) |
1620 | return TMF_RESP_FUNC_FAILED; |
1621 | |
1622 | hisi_hba = dev_to_hisi_hba(device: task->dev); |
1623 | dev = hisi_hba->dev; |
1624 | |
1625 | spin_lock_irqsave(&task->task_state_lock, flags); |
1626 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { |
1627 | struct hisi_sas_cq *cq; |
1628 | |
1629 | if (slot) { |
1630 | /* |
1631 | * sync irq or poll queue to avoid free'ing task |
1632 | * before using task in IO completion |
1633 | */ |
1634 | cq = &hisi_hba->cq[slot->dlvry_queue]; |
1635 | hisi_sas_sync_cq(cq); |
1636 | } |
1637 | spin_unlock_irqrestore(lock: &task->task_state_lock, flags); |
1638 | rc = TMF_RESP_FUNC_COMPLETE; |
1639 | goto out; |
1640 | } |
1641 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
1642 | spin_unlock_irqrestore(lock: &task->task_state_lock, flags); |
1643 | |
1644 | if (slot && task->task_proto & SAS_PROTOCOL_SSP) { |
1645 | u16 tag = slot->idx; |
1646 | int rc2; |
1647 | |
1648 | rc = sas_abort_task(task, tag); |
1649 | rc2 = sas_execute_internal_abort_single(device, tag, |
1650 | qid: slot->dlvry_queue, data: &internal_abort_data); |
1651 | if (rc2 < 0) { |
1652 | dev_err(dev, "abort task: internal abort (%d)\n" , rc2); |
1653 | return TMF_RESP_FUNC_FAILED; |
1654 | } |
1655 | |
1656 | /* |
1657 | * If the TMF finds that the IO is not in the device and also |
1658 | * the internal abort does not succeed, then it is safe to |
1659 | * free the slot. |
1660 | * Note: if the internal abort succeeds then the slot |
1661 | * will have already been completed |
1662 | */ |
1663 | if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) { |
1664 | if (task->lldd_task) |
1665 | hisi_sas_do_release_task(hisi_hba, task, slot, need_lock: true); |
1666 | } |
1667 | } else if (task->task_proto & SAS_PROTOCOL_SATA || |
1668 | task->task_proto & SAS_PROTOCOL_STP) { |
1669 | if (task->dev->dev_type == SAS_SATA_DEV) { |
1670 | struct ata_queued_cmd *qc = task->uldd_task; |
1671 | |
1672 | rc = hisi_sas_internal_task_abort_dev(sas_dev, rst_ha_timeout: false); |
1673 | if (rc < 0) { |
1674 | dev_err(dev, "abort task: internal abort failed\n" ); |
1675 | goto out; |
1676 | } |
1677 | hisi_sas_dereg_device(hisi_hba, device); |
1678 | |
1679 | /* |
1680 | * If an ATA internal command times out in ATA EH, it |
1681 | * need to execute soft reset, so check the scsicmd |
1682 | */ |
1683 | if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) && |
1684 | qc && qc->scsicmd) { |
1685 | hisi_sas_do_release_task(hisi_hba, task, slot, need_lock: true); |
1686 | rc = TMF_RESP_FUNC_COMPLETE; |
1687 | } else { |
1688 | rc = hisi_sas_softreset_ata_disk(device); |
1689 | } |
1690 | } |
1691 | } else if (slot && task->task_proto & SAS_PROTOCOL_SMP) { |
1692 | /* SMP */ |
1693 | u32 tag = slot->idx; |
1694 | struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue]; |
1695 | |
1696 | rc = sas_execute_internal_abort_single(device, |
1697 | tag, qid: slot->dlvry_queue, |
1698 | data: &internal_abort_data); |
1699 | if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) && |
1700 | task->lldd_task) { |
1701 | /* |
1702 | * sync irq or poll queue to avoid free'ing task |
1703 | * before using task in IO completion |
1704 | */ |
1705 | hisi_sas_sync_cq(cq); |
1706 | slot->task = NULL; |
1707 | } |
1708 | } |
1709 | |
1710 | out: |
1711 | if (rc != TMF_RESP_FUNC_COMPLETE) |
1712 | dev_notice(dev, "abort task: rc=%d\n" , rc); |
1713 | return rc; |
1714 | } |
1715 | |
1716 | static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun) |
1717 | { |
1718 | struct hisi_sas_device *sas_dev = device->lldd_dev; |
1719 | struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); |
1720 | struct device *dev = hisi_hba->dev; |
1721 | int rc; |
1722 | |
1723 | rc = hisi_sas_internal_task_abort_dev(sas_dev, rst_ha_timeout: false); |
1724 | if (rc < 0) { |
1725 | dev_err(dev, "abort task set: internal abort rc=%d\n" , rc); |
1726 | return TMF_RESP_FUNC_FAILED; |
1727 | } |
1728 | hisi_sas_dereg_device(hisi_hba, device); |
1729 | |
1730 | rc = sas_abort_task_set(dev: device, lun); |
1731 | if (rc == TMF_RESP_FUNC_COMPLETE) |
1732 | hisi_sas_release_task(hisi_hba, device); |
1733 | |
1734 | return rc; |
1735 | } |
1736 | |
1737 | static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device) |
1738 | { |
1739 | struct sas_phy *local_phy = sas_get_local_phy(dev: device); |
1740 | struct hisi_sas_device *sas_dev = device->lldd_dev; |
1741 | struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); |
1742 | struct sas_ha_struct *sas_ha = &hisi_hba->sha; |
1743 | int rc, reset_type; |
1744 | |
1745 | if (!local_phy->enabled) { |
1746 | sas_put_local_phy(phy: local_phy); |
1747 | return -ENODEV; |
1748 | } |
1749 | |
1750 | if (scsi_is_sas_phy_local(local_phy)) { |
1751 | struct asd_sas_phy *sas_phy = |
1752 | sas_ha->sas_phy[local_phy->number]; |
1753 | struct hisi_sas_phy *phy = |
1754 | container_of(sas_phy, struct hisi_sas_phy, sas_phy); |
1755 | unsigned long flags; |
1756 | |
1757 | spin_lock_irqsave(&phy->lock, flags); |
1758 | phy->in_reset = 1; |
1759 | spin_unlock_irqrestore(lock: &phy->lock, flags); |
1760 | } |
1761 | |
1762 | reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT || |
1763 | !dev_is_sata(dev: device)) ? true : false; |
1764 | |
1765 | rc = sas_phy_reset(phy: local_phy, hard_reset: reset_type); |
1766 | sas_put_local_phy(phy: local_phy); |
1767 | |
1768 | if (scsi_is_sas_phy_local(local_phy)) { |
1769 | struct asd_sas_phy *sas_phy = |
1770 | sas_ha->sas_phy[local_phy->number]; |
1771 | struct hisi_sas_phy *phy = |
1772 | container_of(sas_phy, struct hisi_sas_phy, sas_phy); |
1773 | unsigned long flags; |
1774 | |
1775 | spin_lock_irqsave(&phy->lock, flags); |
1776 | phy->in_reset = 0; |
1777 | spin_unlock_irqrestore(lock: &phy->lock, flags); |
1778 | |
1779 | /* report PHY down if timed out */ |
1780 | if (rc == -ETIMEDOUT) |
1781 | hisi_sas_phy_down(hisi_hba, phy_no: sas_phy->id, rdy: 0, GFP_KERNEL); |
1782 | return rc; |
1783 | } |
1784 | |
1785 | /* Remote phy */ |
1786 | if (rc) |
1787 | return rc; |
1788 | |
1789 | if (dev_is_sata(dev: device)) { |
1790 | struct ata_link *link = &device->sata_dev.ap->link; |
1791 | |
1792 | rc = ata_wait_after_reset(link, HISI_SAS_WAIT_PHYUP_TIMEOUT, |
1793 | check_ready: smp_ata_check_ready_type); |
1794 | } else { |
1795 | msleep(msecs: 2000); |
1796 | } |
1797 | |
1798 | return rc; |
1799 | } |
1800 | |
1801 | static int hisi_sas_I_T_nexus_reset(struct domain_device *device) |
1802 | { |
1803 | struct hisi_sas_device *sas_dev = device->lldd_dev; |
1804 | struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); |
1805 | struct device *dev = hisi_hba->dev; |
1806 | int rc; |
1807 | |
1808 | if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) |
1809 | sas_dev->dev_status = HISI_SAS_DEV_NORMAL; |
1810 | |
1811 | rc = hisi_sas_internal_task_abort_dev(sas_dev, rst_ha_timeout: false); |
1812 | if (rc < 0) { |
1813 | dev_err(dev, "I_T nexus reset: internal abort (%d)\n" , rc); |
1814 | return TMF_RESP_FUNC_FAILED; |
1815 | } |
1816 | hisi_sas_dereg_device(hisi_hba, device); |
1817 | |
1818 | rc = hisi_sas_debug_I_T_nexus_reset(device); |
1819 | if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(dev: device)) { |
1820 | struct sas_phy *local_phy; |
1821 | |
1822 | rc = hisi_sas_softreset_ata_disk(device); |
1823 | switch (rc) { |
1824 | case -ECOMM: |
1825 | rc = -ENODEV; |
1826 | break; |
1827 | case TMF_RESP_FUNC_FAILED: |
1828 | case -EMSGSIZE: |
1829 | case -EIO: |
1830 | local_phy = sas_get_local_phy(dev: device); |
1831 | rc = sas_phy_enable(phy: local_phy, enable: 0); |
1832 | if (!rc) { |
1833 | local_phy->enabled = 0; |
1834 | dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n" , |
1835 | SAS_ADDR(device->sas_addr), rc); |
1836 | rc = -ENODEV; |
1837 | } |
1838 | sas_put_local_phy(phy: local_phy); |
1839 | break; |
1840 | default: |
1841 | break; |
1842 | } |
1843 | } |
1844 | |
1845 | if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV)) |
1846 | hisi_sas_release_task(hisi_hba, device); |
1847 | |
1848 | return rc; |
1849 | } |
1850 | |
1851 | static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun) |
1852 | { |
1853 | struct hisi_sas_device *sas_dev = device->lldd_dev; |
1854 | struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); |
1855 | struct device *dev = hisi_hba->dev; |
1856 | int rc = TMF_RESP_FUNC_FAILED; |
1857 | |
1858 | /* Clear internal IO and then lu reset */ |
1859 | rc = hisi_sas_internal_task_abort_dev(sas_dev, rst_ha_timeout: false); |
1860 | if (rc < 0) { |
1861 | dev_err(dev, "lu_reset: internal abort failed\n" ); |
1862 | goto out; |
1863 | } |
1864 | hisi_sas_dereg_device(hisi_hba, device); |
1865 | |
1866 | if (dev_is_sata(dev: device)) { |
1867 | struct sas_phy *phy; |
1868 | |
1869 | phy = sas_get_local_phy(dev: device); |
1870 | |
1871 | rc = sas_phy_reset(phy, hard_reset: true); |
1872 | |
1873 | if (rc == 0) |
1874 | hisi_sas_release_task(hisi_hba, device); |
1875 | sas_put_local_phy(phy); |
1876 | } else { |
1877 | rc = sas_lu_reset(dev: device, lun); |
1878 | if (rc == TMF_RESP_FUNC_COMPLETE) |
1879 | hisi_sas_release_task(hisi_hba, device); |
1880 | } |
1881 | out: |
1882 | if (rc != TMF_RESP_FUNC_COMPLETE) |
1883 | dev_err(dev, "lu_reset: for device[%d]:rc= %d\n" , |
1884 | sas_dev->device_id, rc); |
1885 | return rc; |
1886 | } |
1887 | |
1888 | static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie) |
1889 | { |
1890 | struct domain_device *device = data; |
1891 | struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); |
1892 | int rc; |
1893 | |
1894 | rc = hisi_sas_debug_I_T_nexus_reset(device); |
1895 | if (rc != TMF_RESP_FUNC_COMPLETE) |
1896 | dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n" , |
1897 | SAS_ADDR(device->sas_addr), rc); |
1898 | } |
1899 | |
1900 | static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha) |
1901 | { |
1902 | struct hisi_hba *hisi_hba = sas_ha->lldd_ha; |
1903 | HISI_SAS_DECLARE_RST_WORK_ON_STACK(r); |
1904 | ASYNC_DOMAIN_EXCLUSIVE(async); |
1905 | int i; |
1906 | |
1907 | queue_work(wq: hisi_hba->wq, work: &r.work); |
1908 | wait_for_completion(r.completion); |
1909 | if (!r.done) |
1910 | return TMF_RESP_FUNC_FAILED; |
1911 | |
1912 | for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { |
1913 | struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; |
1914 | struct domain_device *device = sas_dev->sas_device; |
1915 | |
1916 | if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device || |
1917 | dev_is_expander(type: device->dev_type)) |
1918 | continue; |
1919 | |
1920 | async_schedule_domain(func: hisi_sas_async_I_T_nexus_reset, |
1921 | data: device, domain: &async); |
1922 | } |
1923 | |
1924 | async_synchronize_full_domain(domain: &async); |
1925 | hisi_sas_release_tasks(hisi_hba); |
1926 | |
1927 | return TMF_RESP_FUNC_COMPLETE; |
1928 | } |
1929 | |
1930 | static int hisi_sas_query_task(struct sas_task *task) |
1931 | { |
1932 | int rc = TMF_RESP_FUNC_FAILED; |
1933 | |
1934 | if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { |
1935 | struct hisi_sas_slot *slot = task->lldd_task; |
1936 | u32 tag = slot->idx; |
1937 | |
1938 | rc = sas_query_task(task, tag); |
1939 | switch (rc) { |
1940 | /* The task is still in Lun, release it then */ |
1941 | case TMF_RESP_FUNC_SUCC: |
1942 | /* The task is not in Lun or failed, reset the phy */ |
1943 | case TMF_RESP_FUNC_FAILED: |
1944 | case TMF_RESP_FUNC_COMPLETE: |
1945 | break; |
1946 | default: |
1947 | rc = TMF_RESP_FUNC_FAILED; |
1948 | break; |
1949 | } |
1950 | } |
1951 | return rc; |
1952 | } |
1953 | |
1954 | static bool hisi_sas_internal_abort_timeout(struct sas_task *task, |
1955 | void *data) |
1956 | { |
1957 | struct domain_device *device = task->dev; |
1958 | struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); |
1959 | struct hisi_sas_internal_abort_data *timeout = data; |
1960 | |
1961 | if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct) { |
1962 | down(sem: &hisi_hba->sem); |
1963 | hisi_hba->hw->debugfs_snapshot_regs(hisi_hba); |
1964 | up(sem: &hisi_hba->sem); |
1965 | } |
1966 | |
1967 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { |
1968 | pr_err("Internal abort: timeout %016llx\n" , |
1969 | SAS_ADDR(device->sas_addr)); |
1970 | } else { |
1971 | struct hisi_sas_slot *slot = task->lldd_task; |
1972 | |
1973 | set_bit(HISI_SAS_HW_FAULT_BIT, addr: &hisi_hba->flags); |
1974 | |
1975 | if (slot) { |
1976 | struct hisi_sas_cq *cq = |
1977 | &hisi_hba->cq[slot->dlvry_queue]; |
1978 | /* |
1979 | * sync irq or poll queue to avoid free'ing task |
1980 | * before using task in IO completion |
1981 | */ |
1982 | hisi_sas_sync_cq(cq); |
1983 | slot->task = NULL; |
1984 | } |
1985 | |
1986 | if (timeout->rst_ha_timeout) { |
1987 | pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n" , |
1988 | SAS_ADDR(device->sas_addr)); |
1989 | queue_work(wq: hisi_hba->wq, work: &hisi_hba->rst_work); |
1990 | } else { |
1991 | pr_err("Internal abort: timeout and not done %016llx.\n" , |
1992 | SAS_ADDR(device->sas_addr)); |
1993 | } |
1994 | |
1995 | return true; |
1996 | } |
1997 | |
1998 | return false; |
1999 | } |
2000 | |
2001 | static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy) |
2002 | { |
2003 | hisi_sas_port_notify_formed(sas_phy); |
2004 | } |
2005 | |
2006 | static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type, |
2007 | u8 reg_index, u8 reg_count, u8 *write_data) |
2008 | { |
2009 | struct hisi_hba *hisi_hba = sha->lldd_ha; |
2010 | |
2011 | if (!hisi_hba->hw->write_gpio) |
2012 | return -EOPNOTSUPP; |
2013 | |
2014 | return hisi_hba->hw->write_gpio(hisi_hba, reg_type, |
2015 | reg_index, reg_count, write_data); |
2016 | } |
2017 | |
2018 | static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy) |
2019 | { |
2020 | struct asd_sas_phy *sas_phy = &phy->sas_phy; |
2021 | struct sas_phy *sphy = sas_phy->phy; |
2022 | unsigned long flags; |
2023 | |
2024 | phy->phy_attached = 0; |
2025 | phy->phy_type = 0; |
2026 | phy->port = NULL; |
2027 | |
2028 | spin_lock_irqsave(&phy->lock, flags); |
2029 | if (phy->enable) |
2030 | sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; |
2031 | else |
2032 | sphy->negotiated_linkrate = SAS_PHY_DISABLED; |
2033 | spin_unlock_irqrestore(lock: &phy->lock, flags); |
2034 | } |
2035 | |
2036 | void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy, |
2037 | gfp_t gfp_flags) |
2038 | { |
2039 | struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; |
2040 | struct asd_sas_phy *sas_phy = &phy->sas_phy; |
2041 | struct device *dev = hisi_hba->dev; |
2042 | |
2043 | if (rdy) { |
2044 | /* Phy down but ready */ |
2045 | hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags); |
2046 | hisi_sas_port_notify_formed(sas_phy); |
2047 | } else { |
2048 | struct hisi_sas_port *port = phy->port; |
2049 | |
2050 | if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) || |
2051 | phy->in_reset) { |
2052 | dev_info(dev, "ignore flutter phy%d down\n" , phy_no); |
2053 | return; |
2054 | } |
2055 | /* Phy down and not ready */ |
2056 | sas_notify_phy_event(phy: sas_phy, event: PHYE_LOSS_OF_SIGNAL, gfp_flags); |
2057 | sas_phy_disconnected(phy: sas_phy); |
2058 | |
2059 | if (port) { |
2060 | if (phy->phy_type & PORT_TYPE_SAS) { |
2061 | int port_id = port->id; |
2062 | |
2063 | if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba, |
2064 | port_id)) |
2065 | port->port_attached = 0; |
2066 | } else if (phy->phy_type & PORT_TYPE_SATA) |
2067 | port->port_attached = 0; |
2068 | } |
2069 | hisi_sas_phy_disconnected(phy); |
2070 | } |
2071 | } |
2072 | EXPORT_SYMBOL_GPL(hisi_sas_phy_down); |
2073 | |
2074 | void hisi_sas_phy_bcast(struct hisi_sas_phy *phy) |
2075 | { |
2076 | struct asd_sas_phy *sas_phy = &phy->sas_phy; |
2077 | struct hisi_hba *hisi_hba = phy->hisi_hba; |
2078 | |
2079 | if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) |
2080 | return; |
2081 | |
2082 | sas_notify_port_event(phy: sas_phy, event: PORTE_BROADCAST_RCVD, GFP_ATOMIC); |
2083 | } |
2084 | EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast); |
2085 | |
2086 | int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type) |
2087 | { |
2088 | struct hisi_hba *hisi_hba = shost_priv(shost); |
2089 | |
2090 | if (reset_type != SCSI_ADAPTER_RESET) |
2091 | return -EOPNOTSUPP; |
2092 | |
2093 | queue_work(wq: hisi_hba->wq, work: &hisi_hba->rst_work); |
2094 | |
2095 | return 0; |
2096 | } |
2097 | EXPORT_SYMBOL_GPL(hisi_sas_host_reset); |
2098 | |
2099 | struct scsi_transport_template *hisi_sas_stt; |
2100 | EXPORT_SYMBOL_GPL(hisi_sas_stt); |
2101 | |
2102 | static struct sas_domain_function_template hisi_sas_transport_ops = { |
2103 | .lldd_dev_found = hisi_sas_dev_found, |
2104 | .lldd_dev_gone = hisi_sas_dev_gone, |
2105 | .lldd_execute_task = hisi_sas_queue_command, |
2106 | .lldd_control_phy = hisi_sas_control_phy, |
2107 | .lldd_abort_task = hisi_sas_abort_task, |
2108 | .lldd_abort_task_set = hisi_sas_abort_task_set, |
2109 | .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset, |
2110 | .lldd_lu_reset = hisi_sas_lu_reset, |
2111 | .lldd_query_task = hisi_sas_query_task, |
2112 | .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha, |
2113 | .lldd_port_formed = hisi_sas_port_formed, |
2114 | .lldd_write_gpio = hisi_sas_write_gpio, |
2115 | .lldd_tmf_aborted = hisi_sas_tmf_aborted, |
2116 | .lldd_abort_timeout = hisi_sas_internal_abort_timeout, |
2117 | }; |
2118 | |
2119 | void hisi_sas_init_mem(struct hisi_hba *hisi_hba) |
2120 | { |
2121 | int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS; |
2122 | struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint; |
2123 | |
2124 | for (i = 0; i < hisi_hba->queue_count; i++) { |
2125 | struct hisi_sas_cq *cq = &hisi_hba->cq[i]; |
2126 | struct hisi_sas_dq *dq = &hisi_hba->dq[i]; |
2127 | struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i]; |
2128 | |
2129 | s = sizeof(struct hisi_sas_cmd_hdr); |
2130 | for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++) |
2131 | memset(&cmd_hdr[j], 0, s); |
2132 | |
2133 | dq->wr_point = 0; |
2134 | |
2135 | s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; |
2136 | memset(hisi_hba->complete_hdr[i], 0, s); |
2137 | cq->rd_point = 0; |
2138 | } |
2139 | |
2140 | s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy; |
2141 | memset(hisi_hba->initial_fis, 0, s); |
2142 | |
2143 | s = max_command_entries * sizeof(struct hisi_sas_iost); |
2144 | memset(hisi_hba->iost, 0, s); |
2145 | |
2146 | s = max_command_entries * sizeof(struct hisi_sas_breakpoint); |
2147 | memset(hisi_hba->breakpoint, 0, s); |
2148 | |
2149 | s = sizeof(struct hisi_sas_sata_breakpoint); |
2150 | for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++) |
2151 | memset(&sata_breakpoint[j], 0, s); |
2152 | } |
2153 | EXPORT_SYMBOL_GPL(hisi_sas_init_mem); |
2154 | |
2155 | int hisi_sas_alloc(struct hisi_hba *hisi_hba) |
2156 | { |
2157 | struct device *dev = hisi_hba->dev; |
2158 | int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS; |
2159 | int max_command_entries_ru, sz_slot_buf_ru; |
2160 | int blk_cnt, slots_per_blk; |
2161 | |
2162 | sema_init(sem: &hisi_hba->sem, val: 1); |
2163 | spin_lock_init(&hisi_hba->lock); |
2164 | for (i = 0; i < hisi_hba->n_phy; i++) { |
2165 | hisi_sas_phy_init(hisi_hba, phy_no: i); |
2166 | hisi_hba->port[i].port_attached = 0; |
2167 | hisi_hba->port[i].id = -1; |
2168 | } |
2169 | |
2170 | for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { |
2171 | hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED; |
2172 | hisi_hba->devices[i].device_id = i; |
2173 | hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT; |
2174 | } |
2175 | |
2176 | for (i = 0; i < hisi_hba->queue_count; i++) { |
2177 | struct hisi_sas_cq *cq = &hisi_hba->cq[i]; |
2178 | struct hisi_sas_dq *dq = &hisi_hba->dq[i]; |
2179 | |
2180 | /* Completion queue structure */ |
2181 | cq->id = i; |
2182 | cq->hisi_hba = hisi_hba; |
2183 | spin_lock_init(&cq->poll_lock); |
2184 | |
2185 | /* Delivery queue structure */ |
2186 | spin_lock_init(&dq->lock); |
2187 | INIT_LIST_HEAD(list: &dq->list); |
2188 | dq->id = i; |
2189 | dq->hisi_hba = hisi_hba; |
2190 | |
2191 | /* Delivery queue */ |
2192 | s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; |
2193 | hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, size: s, |
2194 | dma_handle: &hisi_hba->cmd_hdr_dma[i], |
2195 | GFP_KERNEL); |
2196 | if (!hisi_hba->cmd_hdr[i]) |
2197 | goto err_out; |
2198 | |
2199 | /* Completion queue */ |
2200 | s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; |
2201 | hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, size: s, |
2202 | dma_handle: &hisi_hba->complete_hdr_dma[i], |
2203 | GFP_KERNEL); |
2204 | if (!hisi_hba->complete_hdr[i]) |
2205 | goto err_out; |
2206 | } |
2207 | |
2208 | s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct); |
2209 | hisi_hba->itct = dmam_alloc_coherent(dev, size: s, dma_handle: &hisi_hba->itct_dma, |
2210 | GFP_KERNEL); |
2211 | if (!hisi_hba->itct) |
2212 | goto err_out; |
2213 | |
2214 | hisi_hba->slot_info = devm_kcalloc(dev, n: max_command_entries, |
2215 | size: sizeof(struct hisi_sas_slot), |
2216 | GFP_KERNEL); |
2217 | if (!hisi_hba->slot_info) |
2218 | goto err_out; |
2219 | |
2220 | /* roundup to avoid overly large block size */ |
2221 | max_command_entries_ru = roundup(max_command_entries, 64); |
2222 | if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK) |
2223 | sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table); |
2224 | else |
2225 | sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table); |
2226 | sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64); |
2227 | s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE); |
2228 | blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s; |
2229 | slots_per_blk = s / sz_slot_buf_ru; |
2230 | |
2231 | for (i = 0; i < blk_cnt; i++) { |
2232 | int slot_index = i * slots_per_blk; |
2233 | dma_addr_t buf_dma; |
2234 | void *buf; |
2235 | |
2236 | buf = dmam_alloc_coherent(dev, size: s, dma_handle: &buf_dma, |
2237 | GFP_KERNEL); |
2238 | if (!buf) |
2239 | goto err_out; |
2240 | |
2241 | for (j = 0; j < slots_per_blk; j++, slot_index++) { |
2242 | struct hisi_sas_slot *slot; |
2243 | |
2244 | slot = &hisi_hba->slot_info[slot_index]; |
2245 | slot->buf = buf; |
2246 | slot->buf_dma = buf_dma; |
2247 | slot->idx = slot_index; |
2248 | |
2249 | buf += sz_slot_buf_ru; |
2250 | buf_dma += sz_slot_buf_ru; |
2251 | } |
2252 | } |
2253 | |
2254 | s = max_command_entries * sizeof(struct hisi_sas_iost); |
2255 | hisi_hba->iost = dmam_alloc_coherent(dev, size: s, dma_handle: &hisi_hba->iost_dma, |
2256 | GFP_KERNEL); |
2257 | if (!hisi_hba->iost) |
2258 | goto err_out; |
2259 | |
2260 | s = max_command_entries * sizeof(struct hisi_sas_breakpoint); |
2261 | hisi_hba->breakpoint = dmam_alloc_coherent(dev, size: s, |
2262 | dma_handle: &hisi_hba->breakpoint_dma, |
2263 | GFP_KERNEL); |
2264 | if (!hisi_hba->breakpoint) |
2265 | goto err_out; |
2266 | |
2267 | s = hisi_hba->slot_index_count = max_command_entries; |
2268 | hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, nbits: s, GFP_KERNEL); |
2269 | if (!hisi_hba->slot_index_tags) |
2270 | goto err_out; |
2271 | |
2272 | s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS; |
2273 | hisi_hba->initial_fis = dmam_alloc_coherent(dev, size: s, |
2274 | dma_handle: &hisi_hba->initial_fis_dma, |
2275 | GFP_KERNEL); |
2276 | if (!hisi_hba->initial_fis) |
2277 | goto err_out; |
2278 | |
2279 | s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint); |
2280 | hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, size: s, |
2281 | dma_handle: &hisi_hba->sata_breakpoint_dma, |
2282 | GFP_KERNEL); |
2283 | if (!hisi_hba->sata_breakpoint) |
2284 | goto err_out; |
2285 | |
2286 | hisi_hba->last_slot_index = 0; |
2287 | |
2288 | hisi_hba->wq = create_singlethread_workqueue(dev_name(dev)); |
2289 | if (!hisi_hba->wq) { |
2290 | dev_err(dev, "sas_alloc: failed to create workqueue\n" ); |
2291 | goto err_out; |
2292 | } |
2293 | |
2294 | return 0; |
2295 | err_out: |
2296 | return -ENOMEM; |
2297 | } |
2298 | EXPORT_SYMBOL_GPL(hisi_sas_alloc); |
2299 | |
2300 | void hisi_sas_free(struct hisi_hba *hisi_hba) |
2301 | { |
2302 | int i; |
2303 | |
2304 | for (i = 0; i < hisi_hba->n_phy; i++) { |
2305 | struct hisi_sas_phy *phy = &hisi_hba->phy[i]; |
2306 | |
2307 | del_timer_sync(timer: &phy->timer); |
2308 | } |
2309 | |
2310 | if (hisi_hba->wq) |
2311 | destroy_workqueue(wq: hisi_hba->wq); |
2312 | } |
2313 | EXPORT_SYMBOL_GPL(hisi_sas_free); |
2314 | |
2315 | void hisi_sas_rst_work_handler(struct work_struct *work) |
2316 | { |
2317 | struct hisi_hba *hisi_hba = |
2318 | container_of(work, struct hisi_hba, rst_work); |
2319 | |
2320 | if (hisi_sas_controller_prereset(hisi_hba)) |
2321 | return; |
2322 | |
2323 | hisi_sas_controller_reset(hisi_hba); |
2324 | } |
2325 | EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler); |
2326 | |
2327 | void hisi_sas_sync_rst_work_handler(struct work_struct *work) |
2328 | { |
2329 | struct hisi_sas_rst *rst = |
2330 | container_of(work, struct hisi_sas_rst, work); |
2331 | |
2332 | if (hisi_sas_controller_prereset(hisi_hba: rst->hisi_hba)) |
2333 | goto rst_complete; |
2334 | |
2335 | if (!hisi_sas_controller_reset(hisi_hba: rst->hisi_hba)) |
2336 | rst->done = true; |
2337 | rst_complete: |
2338 | complete(rst->completion); |
2339 | } |
2340 | EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler); |
2341 | |
2342 | int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba) |
2343 | { |
2344 | struct device *dev = hisi_hba->dev; |
2345 | struct platform_device *pdev = hisi_hba->platform_dev; |
2346 | struct device_node *np = pdev ? pdev->dev.of_node : NULL; |
2347 | struct clk *refclk; |
2348 | |
2349 | if (device_property_read_u8_array(dev, propname: "sas-addr" , val: hisi_hba->sas_addr, |
2350 | SAS_ADDR_SIZE)) { |
2351 | dev_err(dev, "could not get property sas-addr\n" ); |
2352 | return -ENOENT; |
2353 | } |
2354 | |
2355 | if (np) { |
2356 | /* |
2357 | * These properties are only required for platform device-based |
2358 | * controller with DT firmware. |
2359 | */ |
2360 | hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np, |
2361 | property: "hisilicon,sas-syscon" ); |
2362 | if (IS_ERR(ptr: hisi_hba->ctrl)) { |
2363 | dev_err(dev, "could not get syscon\n" ); |
2364 | return -ENOENT; |
2365 | } |
2366 | |
2367 | if (device_property_read_u32(dev, propname: "ctrl-reset-reg" , |
2368 | val: &hisi_hba->ctrl_reset_reg)) { |
2369 | dev_err(dev, "could not get property ctrl-reset-reg\n" ); |
2370 | return -ENOENT; |
2371 | } |
2372 | |
2373 | if (device_property_read_u32(dev, propname: "ctrl-reset-sts-reg" , |
2374 | val: &hisi_hba->ctrl_reset_sts_reg)) { |
2375 | dev_err(dev, "could not get property ctrl-reset-sts-reg\n" ); |
2376 | return -ENOENT; |
2377 | } |
2378 | |
2379 | if (device_property_read_u32(dev, propname: "ctrl-clock-ena-reg" , |
2380 | val: &hisi_hba->ctrl_clock_ena_reg)) { |
2381 | dev_err(dev, "could not get property ctrl-clock-ena-reg\n" ); |
2382 | return -ENOENT; |
2383 | } |
2384 | } |
2385 | |
2386 | refclk = devm_clk_get(dev, NULL); |
2387 | if (IS_ERR(ptr: refclk)) |
2388 | dev_dbg(dev, "no ref clk property\n" ); |
2389 | else |
2390 | hisi_hba->refclk_frequency_mhz = clk_get_rate(clk: refclk) / 1000000; |
2391 | |
2392 | if (device_property_read_u32(dev, propname: "phy-count" , val: &hisi_hba->n_phy)) { |
2393 | dev_err(dev, "could not get property phy-count\n" ); |
2394 | return -ENOENT; |
2395 | } |
2396 | |
2397 | if (device_property_read_u32(dev, propname: "queue-count" , |
2398 | val: &hisi_hba->queue_count)) { |
2399 | dev_err(dev, "could not get property queue-count\n" ); |
2400 | return -ENOENT; |
2401 | } |
2402 | |
2403 | return 0; |
2404 | } |
2405 | EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info); |
2406 | |
2407 | static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev, |
2408 | const struct hisi_sas_hw *hw) |
2409 | { |
2410 | struct resource *res; |
2411 | struct Scsi_Host *shost; |
2412 | struct hisi_hba *hisi_hba; |
2413 | struct device *dev = &pdev->dev; |
2414 | int error; |
2415 | |
2416 | shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba)); |
2417 | if (!shost) { |
2418 | dev_err(dev, "scsi host alloc failed\n" ); |
2419 | return NULL; |
2420 | } |
2421 | hisi_hba = shost_priv(shost); |
2422 | |
2423 | INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler); |
2424 | hisi_hba->hw = hw; |
2425 | hisi_hba->dev = dev; |
2426 | hisi_hba->platform_dev = pdev; |
2427 | hisi_hba->shost = shost; |
2428 | SHOST_TO_SAS_HA(shost) = &hisi_hba->sha; |
2429 | |
2430 | timer_setup(&hisi_hba->timer, NULL, 0); |
2431 | |
2432 | if (hisi_sas_get_fw_info(hisi_hba) < 0) |
2433 | goto err_out; |
2434 | |
2435 | error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); |
2436 | if (error) { |
2437 | dev_err(dev, "No usable DMA addressing method\n" ); |
2438 | goto err_out; |
2439 | } |
2440 | |
2441 | hisi_hba->regs = devm_platform_ioremap_resource(pdev, index: 0); |
2442 | if (IS_ERR(ptr: hisi_hba->regs)) |
2443 | goto err_out; |
2444 | |
2445 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
2446 | if (res) { |
2447 | hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res); |
2448 | if (IS_ERR(ptr: hisi_hba->sgpio_regs)) |
2449 | goto err_out; |
2450 | } |
2451 | |
2452 | if (hisi_sas_alloc(hisi_hba)) { |
2453 | hisi_sas_free(hisi_hba); |
2454 | goto err_out; |
2455 | } |
2456 | |
2457 | return shost; |
2458 | err_out: |
2459 | scsi_host_put(t: shost); |
2460 | dev_err(dev, "shost alloc failed\n" ); |
2461 | return NULL; |
2462 | } |
2463 | |
2464 | static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba) |
2465 | { |
2466 | if (hisi_hba->hw->interrupt_preinit) |
2467 | return hisi_hba->hw->interrupt_preinit(hisi_hba); |
2468 | return 0; |
2469 | } |
2470 | |
2471 | int hisi_sas_probe(struct platform_device *pdev, |
2472 | const struct hisi_sas_hw *hw) |
2473 | { |
2474 | struct Scsi_Host *shost; |
2475 | struct hisi_hba *hisi_hba; |
2476 | struct device *dev = &pdev->dev; |
2477 | struct asd_sas_phy **arr_phy; |
2478 | struct asd_sas_port **arr_port; |
2479 | struct sas_ha_struct *sha; |
2480 | int rc, phy_nr, port_nr, i; |
2481 | |
2482 | shost = hisi_sas_shost_alloc(pdev, hw); |
2483 | if (!shost) |
2484 | return -ENOMEM; |
2485 | |
2486 | sha = SHOST_TO_SAS_HA(shost); |
2487 | hisi_hba = shost_priv(shost); |
2488 | platform_set_drvdata(pdev, data: sha); |
2489 | |
2490 | phy_nr = port_nr = hisi_hba->n_phy; |
2491 | |
2492 | arr_phy = devm_kcalloc(dev, n: phy_nr, size: sizeof(void *), GFP_KERNEL); |
2493 | arr_port = devm_kcalloc(dev, n: port_nr, size: sizeof(void *), GFP_KERNEL); |
2494 | if (!arr_phy || !arr_port) { |
2495 | rc = -ENOMEM; |
2496 | goto err_out_ha; |
2497 | } |
2498 | |
2499 | sha->sas_phy = arr_phy; |
2500 | sha->sas_port = arr_port; |
2501 | sha->lldd_ha = hisi_hba; |
2502 | |
2503 | shost->transportt = hisi_sas_stt; |
2504 | shost->max_id = HISI_SAS_MAX_DEVICES; |
2505 | shost->max_lun = ~0; |
2506 | shost->max_channel = 1; |
2507 | shost->max_cmd_len = 16; |
2508 | if (hisi_hba->hw->slot_index_alloc) { |
2509 | shost->can_queue = HISI_SAS_MAX_COMMANDS; |
2510 | shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS; |
2511 | } else { |
2512 | shost->can_queue = HISI_SAS_UNRESERVED_IPTT; |
2513 | shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT; |
2514 | } |
2515 | |
2516 | sha->sas_ha_name = DRV_NAME; |
2517 | sha->dev = hisi_hba->dev; |
2518 | sha->sas_addr = &hisi_hba->sas_addr[0]; |
2519 | sha->num_phys = hisi_hba->n_phy; |
2520 | sha->shost = hisi_hba->shost; |
2521 | |
2522 | for (i = 0; i < hisi_hba->n_phy; i++) { |
2523 | sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy; |
2524 | sha->sas_port[i] = &hisi_hba->port[i].sas_port; |
2525 | } |
2526 | |
2527 | rc = hisi_sas_interrupt_preinit(hisi_hba); |
2528 | if (rc) |
2529 | goto err_out_ha; |
2530 | |
2531 | rc = scsi_add_host(host: shost, dev: &pdev->dev); |
2532 | if (rc) |
2533 | goto err_out_ha; |
2534 | |
2535 | rc = sas_register_ha(sha); |
2536 | if (rc) |
2537 | goto err_out_register_ha; |
2538 | |
2539 | rc = hisi_hba->hw->hw_init(hisi_hba); |
2540 | if (rc) |
2541 | goto err_out_hw_init; |
2542 | |
2543 | scsi_scan_host(shost); |
2544 | |
2545 | return 0; |
2546 | |
2547 | err_out_hw_init: |
2548 | sas_unregister_ha(sha); |
2549 | err_out_register_ha: |
2550 | scsi_remove_host(shost); |
2551 | err_out_ha: |
2552 | hisi_sas_free(hisi_hba); |
2553 | scsi_host_put(t: shost); |
2554 | return rc; |
2555 | } |
2556 | EXPORT_SYMBOL_GPL(hisi_sas_probe); |
2557 | |
2558 | void hisi_sas_remove(struct platform_device *pdev) |
2559 | { |
2560 | struct sas_ha_struct *sha = platform_get_drvdata(pdev); |
2561 | struct hisi_hba *hisi_hba = sha->lldd_ha; |
2562 | struct Scsi_Host *shost = sha->shost; |
2563 | |
2564 | del_timer_sync(timer: &hisi_hba->timer); |
2565 | |
2566 | sas_unregister_ha(sha); |
2567 | sas_remove_host(shost); |
2568 | |
2569 | hisi_sas_free(hisi_hba); |
2570 | scsi_host_put(t: shost); |
2571 | } |
2572 | EXPORT_SYMBOL_GPL(hisi_sas_remove); |
2573 | |
2574 | #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE) |
2575 | #define DEBUGFS_ENABLE_DEFAULT "enabled" |
2576 | bool hisi_sas_debugfs_enable = true; |
2577 | u32 hisi_sas_debugfs_dump_count = 50; |
2578 | #else |
2579 | #define DEBUGFS_ENABLE_DEFAULT "disabled" |
2580 | bool hisi_sas_debugfs_enable; |
2581 | u32 hisi_sas_debugfs_dump_count = 1; |
2582 | #endif |
2583 | |
2584 | EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable); |
2585 | module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444); |
2586 | MODULE_PARM_DESC(hisi_sas_debugfs_enable, |
2587 | "Enable driver debugfs (default " DEBUGFS_ENABLE_DEFAULT")" ); |
2588 | |
2589 | EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count); |
2590 | module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444); |
2591 | MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow" ); |
2592 | |
2593 | struct dentry *hisi_sas_debugfs_dir; |
2594 | EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir); |
2595 | |
2596 | static __init int hisi_sas_init(void) |
2597 | { |
2598 | hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops); |
2599 | if (!hisi_sas_stt) |
2600 | return -ENOMEM; |
2601 | |
2602 | if (hisi_sas_debugfs_enable) { |
2603 | hisi_sas_debugfs_dir = debugfs_create_dir(name: "hisi_sas" , NULL); |
2604 | if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) { |
2605 | pr_info("hisi_sas: Limiting debugfs dump count\n" ); |
2606 | hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP; |
2607 | } |
2608 | } |
2609 | |
2610 | return 0; |
2611 | } |
2612 | |
2613 | static __exit void hisi_sas_exit(void) |
2614 | { |
2615 | sas_release_transport(hisi_sas_stt); |
2616 | |
2617 | debugfs_remove(dentry: hisi_sas_debugfs_dir); |
2618 | } |
2619 | |
2620 | module_init(hisi_sas_init); |
2621 | module_exit(hisi_sas_exit); |
2622 | |
2623 | MODULE_LICENSE("GPL" ); |
2624 | MODULE_AUTHOR("John Garry <john.garry@huawei.com>" ); |
2625 | MODULE_DESCRIPTION("HISILICON SAS controller driver" ); |
2626 | MODULE_ALIAS("platform:" DRV_NAME); |
2627 | |