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scsi: hisi_sas: judge result of internal abort
[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
1 /*
2 * Copyright (c) 2015 Linaro Ltd.
3 * Copyright (c) 2015 Hisilicon Limited.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 */
11
12 #include "hisi_sas.h"
13 #define DRV_NAME "hisi_sas"
14
15 #define DEV_IS_GONE(dev) \
16 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
17
18 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
19 u8 *lun, struct hisi_sas_tmf_task *tmf);
20 static int
21 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
22 struct domain_device *device,
23 int abort_flag, int tag);
24 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
25 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
26 void *funcdata);
27
28 u8 hisi_sas_get_ata_protocol(u8 cmd, int direction)
29 {
30 switch (cmd) {
31 case ATA_CMD_FPDMA_WRITE:
32 case ATA_CMD_FPDMA_READ:
33 case ATA_CMD_FPDMA_RECV:
34 case ATA_CMD_FPDMA_SEND:
35 case ATA_CMD_NCQ_NON_DATA:
36 return HISI_SAS_SATA_PROTOCOL_FPDMA;
37
38 case ATA_CMD_DOWNLOAD_MICRO:
39 case ATA_CMD_ID_ATA:
40 case ATA_CMD_PMP_READ:
41 case ATA_CMD_READ_LOG_EXT:
42 case ATA_CMD_PIO_READ:
43 case ATA_CMD_PIO_READ_EXT:
44 case ATA_CMD_PMP_WRITE:
45 case ATA_CMD_WRITE_LOG_EXT:
46 case ATA_CMD_PIO_WRITE:
47 case ATA_CMD_PIO_WRITE_EXT:
48 return HISI_SAS_SATA_PROTOCOL_PIO;
49
50 case ATA_CMD_DSM:
51 case ATA_CMD_DOWNLOAD_MICRO_DMA:
52 case ATA_CMD_PMP_READ_DMA:
53 case ATA_CMD_PMP_WRITE_DMA:
54 case ATA_CMD_READ:
55 case ATA_CMD_READ_EXT:
56 case ATA_CMD_READ_LOG_DMA_EXT:
57 case ATA_CMD_READ_STREAM_DMA_EXT:
58 case ATA_CMD_TRUSTED_RCV_DMA:
59 case ATA_CMD_TRUSTED_SND_DMA:
60 case ATA_CMD_WRITE:
61 case ATA_CMD_WRITE_EXT:
62 case ATA_CMD_WRITE_FUA_EXT:
63 case ATA_CMD_WRITE_QUEUED:
64 case ATA_CMD_WRITE_LOG_DMA_EXT:
65 case ATA_CMD_WRITE_STREAM_DMA_EXT:
66 case ATA_CMD_ZAC_MGMT_IN:
67 return HISI_SAS_SATA_PROTOCOL_DMA;
68
69 case ATA_CMD_CHK_POWER:
70 case ATA_CMD_DEV_RESET:
71 case ATA_CMD_EDD:
72 case ATA_CMD_FLUSH:
73 case ATA_CMD_FLUSH_EXT:
74 case ATA_CMD_VERIFY:
75 case ATA_CMD_VERIFY_EXT:
76 case ATA_CMD_SET_FEATURES:
77 case ATA_CMD_STANDBY:
78 case ATA_CMD_STANDBYNOW1:
79 case ATA_CMD_ZAC_MGMT_OUT:
80 return HISI_SAS_SATA_PROTOCOL_NONDATA;
81 default:
82 if (direction == DMA_NONE)
83 return HISI_SAS_SATA_PROTOCOL_NONDATA;
84 return HISI_SAS_SATA_PROTOCOL_PIO;
85 }
86 }
87 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
88
89 void hisi_sas_sata_done(struct sas_task *task,
90 struct hisi_sas_slot *slot)
91 {
92 struct task_status_struct *ts = &task->task_status;
93 struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
94 struct hisi_sas_status_buffer *status_buf =
95 hisi_sas_status_buf_addr_mem(slot);
96 u8 *iu = &status_buf->iu[0];
97 struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu;
98
99 resp->frame_len = sizeof(struct dev_to_host_fis);
100 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
101
102 ts->buf_valid_size = sizeof(*resp);
103 }
104 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
105
106 int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag)
107 {
108 struct ata_queued_cmd *qc = task->uldd_task;
109
110 if (qc) {
111 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
112 qc->tf.command == ATA_CMD_FPDMA_READ) {
113 *tag = qc->tag;
114 return 1;
115 }
116 }
117 return 0;
118 }
119 EXPORT_SYMBOL_GPL(hisi_sas_get_ncq_tag);
120
121 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
122 {
123 return device->port->ha->lldd_ha;
124 }
125
126 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
127 {
128 return container_of(sas_port, struct hisi_sas_port, sas_port);
129 }
130 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
131
132 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
133 {
134 int phy_no;
135
136 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
137 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
138 }
139 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
140
141 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
142 {
143 void *bitmap = hisi_hba->slot_index_tags;
144
145 clear_bit(slot_idx, bitmap);
146 }
147
148 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
149 {
150 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
151 }
152
153 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
154 {
155 void *bitmap = hisi_hba->slot_index_tags;
156
157 set_bit(slot_idx, bitmap);
158 }
159
160 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
161 {
162 unsigned int index;
163 void *bitmap = hisi_hba->slot_index_tags;
164
165 index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
166 if (index >= hisi_hba->slot_index_count)
167 return -SAS_QUEUE_FULL;
168 hisi_sas_slot_index_set(hisi_hba, index);
169 *slot_idx = index;
170 return 0;
171 }
172
173 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
174 {
175 int i;
176
177 for (i = 0; i < hisi_hba->slot_index_count; ++i)
178 hisi_sas_slot_index_clear(hisi_hba, i);
179 }
180
181 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
182 struct hisi_sas_slot *slot)
183 {
184
185 if (task) {
186 struct device *dev = hisi_hba->dev;
187 struct domain_device *device = task->dev;
188 struct hisi_sas_device *sas_dev = device->lldd_dev;
189
190 if (!task->lldd_task)
191 return;
192
193 task->lldd_task = NULL;
194
195 if (!sas_protocol_ata(task->task_proto))
196 if (slot->n_elem)
197 dma_unmap_sg(dev, task->scatter,
198 task->num_scatter,
199 task->data_dir);
200
201 if (sas_dev)
202 atomic64_dec(&sas_dev->running_req);
203 }
204
205 if (slot->buf)
206 dma_pool_free(hisi_hba->buffer_pool, slot->buf, slot->buf_dma);
207
208 list_del_init(&slot->entry);
209 slot->buf = NULL;
210 slot->task = NULL;
211 slot->port = NULL;
212 hisi_sas_slot_index_free(hisi_hba, slot->idx);
213
214 /* slot memory is fully zeroed when it is reused */
215 }
216 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
217
218 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
219 struct hisi_sas_slot *slot)
220 {
221 return hisi_hba->hw->prep_smp(hisi_hba, slot);
222 }
223
224 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
225 struct hisi_sas_slot *slot, int is_tmf,
226 struct hisi_sas_tmf_task *tmf)
227 {
228 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
229 }
230
231 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
232 struct hisi_sas_slot *slot)
233 {
234 return hisi_hba->hw->prep_stp(hisi_hba, slot);
235 }
236
237 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
238 struct hisi_sas_slot *slot,
239 int device_id, int abort_flag, int tag_to_abort)
240 {
241 return hisi_hba->hw->prep_abort(hisi_hba, slot,
242 device_id, abort_flag, tag_to_abort);
243 }
244
245 /*
246 * This function will issue an abort TMF regardless of whether the
247 * task is in the sdev or not. Then it will do the task complete
248 * cleanup and callbacks.
249 */
250 static void hisi_sas_slot_abort(struct work_struct *work)
251 {
252 struct hisi_sas_slot *abort_slot =
253 container_of(work, struct hisi_sas_slot, abort_slot);
254 struct sas_task *task = abort_slot->task;
255 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
256 struct scsi_cmnd *cmnd = task->uldd_task;
257 struct hisi_sas_tmf_task tmf_task;
258 struct scsi_lun lun;
259 struct device *dev = hisi_hba->dev;
260 int tag = abort_slot->idx;
261 unsigned long flags;
262
263 if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
264 dev_err(dev, "cannot abort slot for non-ssp task\n");
265 goto out;
266 }
267
268 int_to_scsilun(cmnd->device->lun, &lun);
269 tmf_task.tmf = TMF_ABORT_TASK;
270 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
271
272 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
273 out:
274 /* Do cleanup for this task */
275 spin_lock_irqsave(&hisi_hba->lock, flags);
276 hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
277 spin_unlock_irqrestore(&hisi_hba->lock, flags);
278 if (task->task_done)
279 task->task_done(task);
280 }
281
282 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_sas_dq
283 *dq, int is_tmf, struct hisi_sas_tmf_task *tmf,
284 int *pass)
285 {
286 struct hisi_hba *hisi_hba = dq->hisi_hba;
287 struct domain_device *device = task->dev;
288 struct hisi_sas_device *sas_dev = device->lldd_dev;
289 struct hisi_sas_port *port;
290 struct hisi_sas_slot *slot;
291 struct hisi_sas_cmd_hdr *cmd_hdr_base;
292 struct asd_sas_port *sas_port = device->port;
293 struct device *dev = hisi_hba->dev;
294 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
295 unsigned long flags;
296
297 if (!sas_port) {
298 struct task_status_struct *ts = &task->task_status;
299
300 ts->resp = SAS_TASK_UNDELIVERED;
301 ts->stat = SAS_PHY_DOWN;
302 /*
303 * libsas will use dev->port, should
304 * not call task_done for sata
305 */
306 if (device->dev_type != SAS_SATA_DEV)
307 task->task_done(task);
308 return SAS_PHY_DOWN;
309 }
310
311 if (DEV_IS_GONE(sas_dev)) {
312 if (sas_dev)
313 dev_info(dev, "task prep: device %d not ready\n",
314 sas_dev->device_id);
315 else
316 dev_info(dev, "task prep: device %016llx not ready\n",
317 SAS_ADDR(device->sas_addr));
318
319 return SAS_PHY_DOWN;
320 }
321
322 port = to_hisi_sas_port(sas_port);
323 if (port && !port->port_attached) {
324 dev_info(dev, "task prep: %s port%d not attach device\n",
325 (dev_is_sata(device)) ?
326 "SATA/STP" : "SAS",
327 device->port->id);
328
329 return SAS_PHY_DOWN;
330 }
331
332 if (!sas_protocol_ata(task->task_proto)) {
333 if (task->num_scatter) {
334 n_elem = dma_map_sg(dev, task->scatter,
335 task->num_scatter, task->data_dir);
336 if (!n_elem) {
337 rc = -ENOMEM;
338 goto prep_out;
339 }
340 }
341 } else
342 n_elem = task->num_scatter;
343
344 spin_lock_irqsave(&hisi_hba->lock, flags);
345 if (hisi_hba->hw->slot_index_alloc)
346 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
347 device);
348 else
349 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
350 if (rc) {
351 spin_unlock_irqrestore(&hisi_hba->lock, flags);
352 goto err_out;
353 }
354 spin_unlock_irqrestore(&hisi_hba->lock, flags);
355
356 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
357 if (rc)
358 goto err_out_tag;
359
360 dlvry_queue = dq->id;
361 dlvry_queue_slot = dq->wr_point;
362 slot = &hisi_hba->slot_info[slot_idx];
363 memset(slot, 0, sizeof(struct hisi_sas_slot));
364
365 slot->idx = slot_idx;
366 slot->n_elem = n_elem;
367 slot->dlvry_queue = dlvry_queue;
368 slot->dlvry_queue_slot = dlvry_queue_slot;
369 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
370 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
371 slot->task = task;
372 slot->port = port;
373 task->lldd_task = slot;
374 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
375
376 slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
377 GFP_ATOMIC, &slot->buf_dma);
378 if (!slot->buf) {
379 rc = -ENOMEM;
380 goto err_out_slot_buf;
381 }
382 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
383 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
384 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
385
386 switch (task->task_proto) {
387 case SAS_PROTOCOL_SMP:
388 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
389 break;
390 case SAS_PROTOCOL_SSP:
391 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
392 break;
393 case SAS_PROTOCOL_SATA:
394 case SAS_PROTOCOL_STP:
395 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
396 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
397 break;
398 default:
399 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
400 task->task_proto);
401 rc = -EINVAL;
402 break;
403 }
404
405 if (rc) {
406 dev_err(dev, "task prep: rc = 0x%x\n", rc);
407 goto err_out_buf;
408 }
409
410 spin_lock_irqsave(&hisi_hba->lock, flags);
411 list_add_tail(&slot->entry, &sas_dev->list);
412 spin_unlock_irqrestore(&hisi_hba->lock, flags);
413 spin_lock_irqsave(&task->task_state_lock, flags);
414 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
415 spin_unlock_irqrestore(&task->task_state_lock, flags);
416
417 dq->slot_prep = slot;
418
419 atomic64_inc(&sas_dev->running_req);
420 ++(*pass);
421
422 return 0;
423
424 err_out_buf:
425 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
426 slot->buf_dma);
427 err_out_slot_buf:
428 /* Nothing to be done */
429 err_out_tag:
430 spin_lock_irqsave(&hisi_hba->lock, flags);
431 hisi_sas_slot_index_free(hisi_hba, slot_idx);
432 spin_unlock_irqrestore(&hisi_hba->lock, flags);
433 err_out:
434 dev_err(dev, "task prep: failed[%d]!\n", rc);
435 if (!sas_protocol_ata(task->task_proto))
436 if (n_elem)
437 dma_unmap_sg(dev, task->scatter,
438 task->num_scatter,
439 task->data_dir);
440 prep_out:
441 return rc;
442 }
443
444 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
445 int is_tmf, struct hisi_sas_tmf_task *tmf)
446 {
447 u32 rc;
448 u32 pass = 0;
449 unsigned long flags;
450 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
451 struct device *dev = hisi_hba->dev;
452 struct domain_device *device = task->dev;
453 struct hisi_sas_device *sas_dev = device->lldd_dev;
454 struct hisi_sas_dq *dq = sas_dev->dq;
455
456 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
457 return -EINVAL;
458
459 /* protect task_prep and start_delivery sequence */
460 spin_lock_irqsave(&dq->lock, flags);
461 rc = hisi_sas_task_prep(task, dq, is_tmf, tmf, &pass);
462 if (rc)
463 dev_err(dev, "task exec: failed[%d]!\n", rc);
464
465 if (likely(pass))
466 hisi_hba->hw->start_delivery(dq);
467 spin_unlock_irqrestore(&dq->lock, flags);
468
469 return rc;
470 }
471
472 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
473 {
474 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
475 struct asd_sas_phy *sas_phy = &phy->sas_phy;
476 struct sas_ha_struct *sas_ha;
477
478 if (!phy->phy_attached)
479 return;
480
481 sas_ha = &hisi_hba->sha;
482 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
483
484 if (sas_phy->phy) {
485 struct sas_phy *sphy = sas_phy->phy;
486
487 sphy->negotiated_linkrate = sas_phy->linkrate;
488 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
489 sphy->maximum_linkrate_hw =
490 hisi_hba->hw->phy_get_max_linkrate();
491 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
492 sphy->minimum_linkrate = phy->minimum_linkrate;
493
494 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
495 sphy->maximum_linkrate = phy->maximum_linkrate;
496 }
497
498 if (phy->phy_type & PORT_TYPE_SAS) {
499 struct sas_identify_frame *id;
500
501 id = (struct sas_identify_frame *)phy->frame_rcvd;
502 id->dev_type = phy->identify.device_type;
503 id->initiator_bits = SAS_PROTOCOL_ALL;
504 id->target_bits = phy->identify.target_port_protocols;
505 } else if (phy->phy_type & PORT_TYPE_SATA) {
506 /*Nothing*/
507 }
508
509 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
510 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
511 }
512
513 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
514 {
515 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
516 struct hisi_sas_device *sas_dev = NULL;
517 unsigned long flags;
518 int i;
519
520 spin_lock_irqsave(&hisi_hba->lock, flags);
521 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
522 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
523 int queue = i % hisi_hba->queue_count;
524 struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
525
526 hisi_hba->devices[i].device_id = i;
527 sas_dev = &hisi_hba->devices[i];
528 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
529 sas_dev->dev_type = device->dev_type;
530 sas_dev->hisi_hba = hisi_hba;
531 sas_dev->sas_device = device;
532 sas_dev->dq = dq;
533 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
534 break;
535 }
536 }
537 spin_unlock_irqrestore(&hisi_hba->lock, flags);
538
539 return sas_dev;
540 }
541
542 static int hisi_sas_dev_found(struct domain_device *device)
543 {
544 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
545 struct domain_device *parent_dev = device->parent;
546 struct hisi_sas_device *sas_dev;
547 struct device *dev = hisi_hba->dev;
548
549 if (hisi_hba->hw->alloc_dev)
550 sas_dev = hisi_hba->hw->alloc_dev(device);
551 else
552 sas_dev = hisi_sas_alloc_dev(device);
553 if (!sas_dev) {
554 dev_err(dev, "fail alloc dev: max support %d devices\n",
555 HISI_SAS_MAX_DEVICES);
556 return -EINVAL;
557 }
558
559 device->lldd_dev = sas_dev;
560 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
561
562 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
563 int phy_no;
564 u8 phy_num = parent_dev->ex_dev.num_phys;
565 struct ex_phy *phy;
566
567 for (phy_no = 0; phy_no < phy_num; phy_no++) {
568 phy = &parent_dev->ex_dev.ex_phy[phy_no];
569 if (SAS_ADDR(phy->attached_sas_addr) ==
570 SAS_ADDR(device->sas_addr)) {
571 sas_dev->attached_phy = phy_no;
572 break;
573 }
574 }
575
576 if (phy_no == phy_num) {
577 dev_info(dev, "dev found: no attached "
578 "dev:%016llx at ex:%016llx\n",
579 SAS_ADDR(device->sas_addr),
580 SAS_ADDR(parent_dev->sas_addr));
581 return -EINVAL;
582 }
583 }
584
585 dev_info(dev, "dev[%d:%x] found\n",
586 sas_dev->device_id, sas_dev->dev_type);
587
588 return 0;
589 }
590
591 static int hisi_sas_slave_configure(struct scsi_device *sdev)
592 {
593 struct domain_device *dev = sdev_to_domain_dev(sdev);
594 int ret = sas_slave_configure(sdev);
595
596 if (ret)
597 return ret;
598 if (!dev_is_sata(dev))
599 sas_change_queue_depth(sdev, 64);
600
601 return 0;
602 }
603
604 static void hisi_sas_scan_start(struct Scsi_Host *shost)
605 {
606 struct hisi_hba *hisi_hba = shost_priv(shost);
607
608 hisi_hba->hw->phys_init(hisi_hba);
609 }
610
611 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
612 {
613 struct hisi_hba *hisi_hba = shost_priv(shost);
614 struct sas_ha_struct *sha = &hisi_hba->sha;
615
616 /* Wait for PHY up interrupt to occur */
617 if (time < HZ)
618 return 0;
619
620 sas_drain_work(sha);
621 return 1;
622 }
623
624 static void hisi_sas_phyup_work(struct work_struct *work)
625 {
626 struct hisi_sas_phy *phy =
627 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
628 struct hisi_hba *hisi_hba = phy->hisi_hba;
629 struct asd_sas_phy *sas_phy = &phy->sas_phy;
630 int phy_no = sas_phy->id;
631
632 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
633 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
634 }
635
636 static void hisi_sas_linkreset_work(struct work_struct *work)
637 {
638 struct hisi_sas_phy *phy =
639 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
640 struct asd_sas_phy *sas_phy = &phy->sas_phy;
641
642 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
643 }
644
645 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
646 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
647 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
648 };
649
650 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
651 enum hisi_sas_phy_event event)
652 {
653 struct hisi_hba *hisi_hba = phy->hisi_hba;
654
655 if (WARN_ON(event >= HISI_PHYES_NUM))
656 return false;
657
658 return queue_work(hisi_hba->wq, &phy->works[event]);
659 }
660 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
661
662 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
663 {
664 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
665 struct asd_sas_phy *sas_phy = &phy->sas_phy;
666 int i;
667
668 phy->hisi_hba = hisi_hba;
669 phy->port = NULL;
670 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
671 sas_phy->class = SAS;
672 sas_phy->iproto = SAS_PROTOCOL_ALL;
673 sas_phy->tproto = 0;
674 sas_phy->type = PHY_TYPE_PHYSICAL;
675 sas_phy->role = PHY_ROLE_INITIATOR;
676 sas_phy->oob_mode = OOB_NOT_CONNECTED;
677 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
678 sas_phy->id = phy_no;
679 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
680 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
681 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
682 sas_phy->lldd_phy = phy;
683
684 for (i = 0; i < HISI_PHYES_NUM; i++)
685 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
686 }
687
688 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
689 {
690 struct sas_ha_struct *sas_ha = sas_phy->ha;
691 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
692 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
693 struct asd_sas_port *sas_port = sas_phy->port;
694 struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
695 unsigned long flags;
696
697 if (!sas_port)
698 return;
699
700 spin_lock_irqsave(&hisi_hba->lock, flags);
701 port->port_attached = 1;
702 port->id = phy->port_id;
703 phy->port = port;
704 sas_port->lldd_port = port;
705 spin_unlock_irqrestore(&hisi_hba->lock, flags);
706 }
707
708 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
709 struct hisi_sas_slot *slot)
710 {
711 if (task) {
712 unsigned long flags;
713 struct task_status_struct *ts;
714
715 ts = &task->task_status;
716
717 ts->resp = SAS_TASK_COMPLETE;
718 ts->stat = SAS_ABORTED_TASK;
719 spin_lock_irqsave(&task->task_state_lock, flags);
720 task->task_state_flags &=
721 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
722 task->task_state_flags |= SAS_TASK_STATE_DONE;
723 spin_unlock_irqrestore(&task->task_state_lock, flags);
724 }
725
726 hisi_sas_slot_task_free(hisi_hba, task, slot);
727 }
728
729 /* hisi_hba.lock should be locked */
730 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
731 struct domain_device *device)
732 {
733 struct hisi_sas_slot *slot, *slot2;
734 struct hisi_sas_device *sas_dev = device->lldd_dev;
735
736 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
737 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
738 }
739
740 static void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
741 {
742 struct hisi_sas_device *sas_dev;
743 struct domain_device *device;
744 int i;
745
746 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
747 sas_dev = &hisi_hba->devices[i];
748 device = sas_dev->sas_device;
749
750 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
751 !device)
752 continue;
753
754 hisi_sas_release_task(hisi_hba, device);
755 }
756 }
757
758 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
759 struct domain_device *device)
760 {
761 if (hisi_hba->hw->dereg_device)
762 hisi_hba->hw->dereg_device(hisi_hba, device);
763 }
764
765 static void hisi_sas_dev_gone(struct domain_device *device)
766 {
767 struct hisi_sas_device *sas_dev = device->lldd_dev;
768 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
769 struct device *dev = hisi_hba->dev;
770
771 dev_info(dev, "dev[%d:%x] is gone\n",
772 sas_dev->device_id, sas_dev->dev_type);
773
774 if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
775 hisi_sas_internal_task_abort(hisi_hba, device,
776 HISI_SAS_INT_ABT_DEV, 0);
777
778 hisi_sas_dereg_device(hisi_hba, device);
779
780 hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
781 device->lldd_dev = NULL;
782 memset(sas_dev, 0, sizeof(*sas_dev));
783 }
784
785 if (hisi_hba->hw->free_device)
786 hisi_hba->hw->free_device(sas_dev);
787 sas_dev->dev_type = SAS_PHY_UNUSED;
788 }
789
790 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
791 {
792 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
793 }
794
795 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
796 void *funcdata)
797 {
798 struct sas_ha_struct *sas_ha = sas_phy->ha;
799 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
800 int phy_no = sas_phy->id;
801
802 switch (func) {
803 case PHY_FUNC_HARD_RESET:
804 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
805 break;
806
807 case PHY_FUNC_LINK_RESET:
808 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
809 msleep(100);
810 hisi_hba->hw->phy_start(hisi_hba, phy_no);
811 break;
812
813 case PHY_FUNC_DISABLE:
814 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
815 break;
816
817 case PHY_FUNC_SET_LINK_RATE:
818 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
819 break;
820 case PHY_FUNC_GET_EVENTS:
821 if (hisi_hba->hw->get_events) {
822 hisi_hba->hw->get_events(hisi_hba, phy_no);
823 break;
824 }
825 /* fallthru */
826 case PHY_FUNC_RELEASE_SPINUP_HOLD:
827 default:
828 return -EOPNOTSUPP;
829 }
830 return 0;
831 }
832
833 static void hisi_sas_task_done(struct sas_task *task)
834 {
835 if (!del_timer(&task->slow_task->timer))
836 return;
837 complete(&task->slow_task->completion);
838 }
839
840 static void hisi_sas_tmf_timedout(struct timer_list *t)
841 {
842 struct sas_task_slow *slow = from_timer(slow, t, timer);
843 struct sas_task *task = slow->task;
844 unsigned long flags;
845
846 spin_lock_irqsave(&task->task_state_lock, flags);
847 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
848 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
849 spin_unlock_irqrestore(&task->task_state_lock, flags);
850
851 complete(&task->slow_task->completion);
852 }
853
854 #define TASK_TIMEOUT 20
855 #define TASK_RETRY 3
856 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
857 void *parameter, u32 para_len,
858 struct hisi_sas_tmf_task *tmf)
859 {
860 struct hisi_sas_device *sas_dev = device->lldd_dev;
861 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
862 struct device *dev = hisi_hba->dev;
863 struct sas_task *task;
864 int res, retry;
865
866 for (retry = 0; retry < TASK_RETRY; retry++) {
867 task = sas_alloc_slow_task(GFP_KERNEL);
868 if (!task)
869 return -ENOMEM;
870
871 task->dev = device;
872 task->task_proto = device->tproto;
873
874 if (dev_is_sata(device)) {
875 task->ata_task.device_control_reg_update = 1;
876 memcpy(&task->ata_task.fis, parameter, para_len);
877 } else {
878 memcpy(&task->ssp_task, parameter, para_len);
879 }
880 task->task_done = hisi_sas_task_done;
881
882 task->slow_task->timer.function = hisi_sas_tmf_timedout;
883 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
884 add_timer(&task->slow_task->timer);
885
886 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
887
888 if (res) {
889 del_timer(&task->slow_task->timer);
890 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
891 res);
892 goto ex_err;
893 }
894
895 wait_for_completion(&task->slow_task->completion);
896 res = TMF_RESP_FUNC_FAILED;
897 /* Even TMF timed out, return direct. */
898 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
899 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
900 struct hisi_sas_slot *slot = task->lldd_task;
901
902 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
903 if (slot)
904 slot->task = NULL;
905
906 goto ex_err;
907 } else
908 dev_err(dev, "abort tmf: TMF task timeout\n");
909 }
910
911 if (task->task_status.resp == SAS_TASK_COMPLETE &&
912 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
913 res = TMF_RESP_FUNC_COMPLETE;
914 break;
915 }
916
917 if (task->task_status.resp == SAS_TASK_COMPLETE &&
918 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
919 res = TMF_RESP_FUNC_SUCC;
920 break;
921 }
922
923 if (task->task_status.resp == SAS_TASK_COMPLETE &&
924 task->task_status.stat == SAS_DATA_UNDERRUN) {
925 /* no error, but return the number of bytes of
926 * underrun
927 */
928 dev_warn(dev, "abort tmf: task to dev %016llx "
929 "resp: 0x%x sts 0x%x underrun\n",
930 SAS_ADDR(device->sas_addr),
931 task->task_status.resp,
932 task->task_status.stat);
933 res = task->task_status.residual;
934 break;
935 }
936
937 if (task->task_status.resp == SAS_TASK_COMPLETE &&
938 task->task_status.stat == SAS_DATA_OVERRUN) {
939 dev_warn(dev, "abort tmf: blocked task error\n");
940 res = -EMSGSIZE;
941 break;
942 }
943
944 dev_warn(dev, "abort tmf: task to dev "
945 "%016llx resp: 0x%x status 0x%x\n",
946 SAS_ADDR(device->sas_addr), task->task_status.resp,
947 task->task_status.stat);
948 sas_free_task(task);
949 task = NULL;
950 }
951 ex_err:
952 if (retry == TASK_RETRY)
953 dev_warn(dev, "abort tmf: executing internal task failed!\n");
954 sas_free_task(task);
955 return res;
956 }
957
958 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
959 bool reset, int pmp, u8 *fis)
960 {
961 struct ata_taskfile tf;
962
963 ata_tf_init(dev, &tf);
964 if (reset)
965 tf.ctl |= ATA_SRST;
966 else
967 tf.ctl &= ~ATA_SRST;
968 tf.command = ATA_CMD_DEV_RESET;
969 ata_tf_to_fis(&tf, pmp, 0, fis);
970 }
971
972 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
973 {
974 u8 fis[20] = {0};
975 struct ata_port *ap = device->sata_dev.ap;
976 struct ata_link *link;
977 int rc = TMF_RESP_FUNC_FAILED;
978 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
979 struct device *dev = hisi_hba->dev;
980 int s = sizeof(struct host_to_dev_fis);
981 unsigned long flags;
982
983 ata_for_each_link(link, ap, EDGE) {
984 int pmp = sata_srst_pmp(link);
985
986 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
987 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
988 if (rc != TMF_RESP_FUNC_COMPLETE)
989 break;
990 }
991
992 if (rc == TMF_RESP_FUNC_COMPLETE) {
993 ata_for_each_link(link, ap, EDGE) {
994 int pmp = sata_srst_pmp(link);
995
996 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
997 rc = hisi_sas_exec_internal_tmf_task(device, fis,
998 s, NULL);
999 if (rc != TMF_RESP_FUNC_COMPLETE)
1000 dev_err(dev, "ata disk de-reset failed\n");
1001 }
1002 } else {
1003 dev_err(dev, "ata disk reset failed\n");
1004 }
1005
1006 if (rc == TMF_RESP_FUNC_COMPLETE) {
1007 spin_lock_irqsave(&hisi_hba->lock, flags);
1008 hisi_sas_release_task(hisi_hba, device);
1009 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1010 }
1011
1012 return rc;
1013 }
1014
1015 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1016 u8 *lun, struct hisi_sas_tmf_task *tmf)
1017 {
1018 struct sas_ssp_task ssp_task;
1019
1020 if (!(device->tproto & SAS_PROTOCOL_SSP))
1021 return TMF_RESP_FUNC_ESUPP;
1022
1023 memcpy(ssp_task.LUN, lun, 8);
1024
1025 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1026 sizeof(ssp_task), tmf);
1027 }
1028
1029 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1030 {
1031 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1032 int i;
1033
1034 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1035 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1036 struct domain_device *device = sas_dev->sas_device;
1037 struct asd_sas_port *sas_port;
1038 struct hisi_sas_port *port;
1039 struct hisi_sas_phy *phy = NULL;
1040 struct asd_sas_phy *sas_phy;
1041
1042 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1043 || !device || !device->port)
1044 continue;
1045
1046 sas_port = device->port;
1047 port = to_hisi_sas_port(sas_port);
1048
1049 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1050 if (state & BIT(sas_phy->id)) {
1051 phy = sas_phy->lldd_phy;
1052 break;
1053 }
1054
1055 if (phy) {
1056 port->id = phy->port_id;
1057
1058 /* Update linkrate of directly attached device. */
1059 if (!device->parent)
1060 device->linkrate = phy->sas_phy.linkrate;
1061
1062 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1063 } else
1064 port->id = 0xff;
1065 }
1066 }
1067
1068 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1069 u32 state)
1070 {
1071 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1072 struct asd_sas_port *_sas_port = NULL;
1073 int phy_no;
1074
1075 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1076 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1077 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1078 struct asd_sas_port *sas_port = sas_phy->port;
1079 bool do_port_check = !!(_sas_port != sas_port);
1080
1081 if (!sas_phy->phy->enabled)
1082 continue;
1083
1084 /* Report PHY state change to libsas */
1085 if (state & BIT(phy_no)) {
1086 if (do_port_check && sas_port && sas_port->port_dev) {
1087 struct domain_device *dev = sas_port->port_dev;
1088
1089 _sas_port = sas_port;
1090
1091 if (DEV_IS_EXPANDER(dev->dev_type))
1092 sas_ha->notify_port_event(sas_phy,
1093 PORTE_BROADCAST_RCVD);
1094 }
1095 } else if (old_state & (1 << phy_no))
1096 /* PHY down but was up before */
1097 hisi_sas_phy_down(hisi_hba, phy_no, 0);
1098
1099 }
1100 }
1101
1102 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1103 {
1104 struct device *dev = hisi_hba->dev;
1105 struct Scsi_Host *shost = hisi_hba->shost;
1106 u32 old_state, state;
1107 unsigned long flags;
1108 int rc;
1109
1110 if (!hisi_hba->hw->soft_reset)
1111 return -1;
1112
1113 if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1114 return -1;
1115
1116 dev_info(dev, "controller resetting...\n");
1117 old_state = hisi_hba->hw->get_phys_state(hisi_hba);
1118
1119 scsi_block_requests(shost);
1120 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1121 rc = hisi_hba->hw->soft_reset(hisi_hba);
1122 if (rc) {
1123 dev_warn(dev, "controller reset failed (%d)\n", rc);
1124 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1125 scsi_unblock_requests(shost);
1126 goto out;
1127 }
1128 spin_lock_irqsave(&hisi_hba->lock, flags);
1129 hisi_sas_release_tasks(hisi_hba);
1130 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1131
1132 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1133
1134 /* Init and wait for PHYs to come up and all libsas event finished. */
1135 hisi_hba->hw->phys_init(hisi_hba);
1136 msleep(1000);
1137 hisi_sas_refresh_port_id(hisi_hba);
1138 scsi_unblock_requests(shost);
1139
1140 state = hisi_hba->hw->get_phys_state(hisi_hba);
1141 hisi_sas_rescan_topology(hisi_hba, old_state, state);
1142 dev_info(dev, "controller reset complete\n");
1143
1144 out:
1145 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1146
1147 return rc;
1148 }
1149
1150 static int hisi_sas_abort_task(struct sas_task *task)
1151 {
1152 struct scsi_lun lun;
1153 struct hisi_sas_tmf_task tmf_task;
1154 struct domain_device *device = task->dev;
1155 struct hisi_sas_device *sas_dev = device->lldd_dev;
1156 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
1157 struct device *dev = hisi_hba->dev;
1158 int rc = TMF_RESP_FUNC_FAILED;
1159 unsigned long flags;
1160
1161 if (!sas_dev) {
1162 dev_warn(dev, "Device has been removed\n");
1163 return TMF_RESP_FUNC_FAILED;
1164 }
1165
1166 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1167 rc = TMF_RESP_FUNC_COMPLETE;
1168 goto out;
1169 }
1170
1171 sas_dev->dev_status = HISI_SAS_DEV_EH;
1172 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1173 struct scsi_cmnd *cmnd = task->uldd_task;
1174 struct hisi_sas_slot *slot = task->lldd_task;
1175 u32 tag = slot->idx;
1176 int rc2;
1177
1178 int_to_scsilun(cmnd->device->lun, &lun);
1179 tmf_task.tmf = TMF_ABORT_TASK;
1180 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1181
1182 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1183 &tmf_task);
1184
1185 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1186 HISI_SAS_INT_ABT_CMD, tag);
1187 if (rc2 < 0) {
1188 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1189 return TMF_RESP_FUNC_FAILED;
1190 }
1191
1192 /*
1193 * If the TMF finds that the IO is not in the device and also
1194 * the internal abort does not succeed, then it is safe to
1195 * free the slot.
1196 * Note: if the internal abort succeeds then the slot
1197 * will have already been completed
1198 */
1199 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1200 if (task->lldd_task) {
1201 spin_lock_irqsave(&hisi_hba->lock, flags);
1202 hisi_sas_do_release_task(hisi_hba, task, slot);
1203 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1204 }
1205 }
1206 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1207 task->task_proto & SAS_PROTOCOL_STP) {
1208 if (task->dev->dev_type == SAS_SATA_DEV) {
1209 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1210 HISI_SAS_INT_ABT_DEV, 0);
1211 if (rc < 0) {
1212 dev_err(dev, "abort task: internal abort failed\n");
1213 goto out;
1214 }
1215 hisi_sas_dereg_device(hisi_hba, device);
1216 rc = hisi_sas_softreset_ata_disk(device);
1217 }
1218 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1219 /* SMP */
1220 struct hisi_sas_slot *slot = task->lldd_task;
1221 u32 tag = slot->idx;
1222
1223 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1224 HISI_SAS_INT_ABT_CMD, tag);
1225 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1226 task->lldd_task) {
1227 spin_lock_irqsave(&hisi_hba->lock, flags);
1228 hisi_sas_do_release_task(hisi_hba, task, slot);
1229 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1230 }
1231 }
1232
1233 out:
1234 if (rc != TMF_RESP_FUNC_COMPLETE)
1235 dev_notice(dev, "abort task: rc=%d\n", rc);
1236 return rc;
1237 }
1238
1239 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1240 {
1241 struct hisi_sas_tmf_task tmf_task;
1242 int rc = TMF_RESP_FUNC_FAILED;
1243
1244 tmf_task.tmf = TMF_ABORT_TASK_SET;
1245 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1246
1247 return rc;
1248 }
1249
1250 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1251 {
1252 int rc = TMF_RESP_FUNC_FAILED;
1253 struct hisi_sas_tmf_task tmf_task;
1254
1255 tmf_task.tmf = TMF_CLEAR_ACA;
1256 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1257
1258 return rc;
1259 }
1260
1261 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1262 {
1263 struct sas_phy *phy = sas_get_local_phy(device);
1264 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1265 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1266 rc = sas_phy_reset(phy, reset_type);
1267 sas_put_local_phy(phy);
1268 msleep(2000);
1269 return rc;
1270 }
1271
1272 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1273 {
1274 struct hisi_sas_device *sas_dev = device->lldd_dev;
1275 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1276 struct device *dev = hisi_hba->dev;
1277 int rc = TMF_RESP_FUNC_FAILED;
1278 unsigned long flags;
1279
1280 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
1281 return TMF_RESP_FUNC_FAILED;
1282 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1283
1284 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1285 HISI_SAS_INT_ABT_DEV, 0);
1286 if (rc < 0) {
1287 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1288 return TMF_RESP_FUNC_FAILED;
1289 }
1290 hisi_sas_dereg_device(hisi_hba, device);
1291
1292 rc = hisi_sas_debug_I_T_nexus_reset(device);
1293
1294 if (rc == TMF_RESP_FUNC_COMPLETE) {
1295 spin_lock_irqsave(&hisi_hba->lock, flags);
1296 hisi_sas_release_task(hisi_hba, device);
1297 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1298 }
1299 return rc;
1300 }
1301
1302 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1303 {
1304 struct hisi_sas_device *sas_dev = device->lldd_dev;
1305 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1306 struct device *dev = hisi_hba->dev;
1307 unsigned long flags;
1308 int rc = TMF_RESP_FUNC_FAILED;
1309
1310 sas_dev->dev_status = HISI_SAS_DEV_EH;
1311 if (dev_is_sata(device)) {
1312 struct sas_phy *phy;
1313
1314 /* Clear internal IO and then hardreset */
1315 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1316 HISI_SAS_INT_ABT_DEV, 0);
1317 if (rc < 0) {
1318 dev_err(dev, "lu_reset: internal abort failed\n");
1319 goto out;
1320 }
1321 hisi_sas_dereg_device(hisi_hba, device);
1322
1323 phy = sas_get_local_phy(device);
1324
1325 rc = sas_phy_reset(phy, 1);
1326
1327 if (rc == 0) {
1328 spin_lock_irqsave(&hisi_hba->lock, flags);
1329 hisi_sas_release_task(hisi_hba, device);
1330 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1331 }
1332 sas_put_local_phy(phy);
1333 } else {
1334 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1335
1336 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1337 if (rc == TMF_RESP_FUNC_COMPLETE) {
1338 spin_lock_irqsave(&hisi_hba->lock, flags);
1339 hisi_sas_release_task(hisi_hba, device);
1340 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1341 }
1342 }
1343 out:
1344 if (rc != TMF_RESP_FUNC_COMPLETE)
1345 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1346 sas_dev->device_id, rc);
1347 return rc;
1348 }
1349
1350 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1351 {
1352 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1353 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1354
1355 queue_work(hisi_hba->wq, &r.work);
1356 wait_for_completion(r.completion);
1357 if (r.done)
1358 return TMF_RESP_FUNC_COMPLETE;
1359
1360 return TMF_RESP_FUNC_FAILED;
1361 }
1362
1363 static int hisi_sas_query_task(struct sas_task *task)
1364 {
1365 struct scsi_lun lun;
1366 struct hisi_sas_tmf_task tmf_task;
1367 int rc = TMF_RESP_FUNC_FAILED;
1368
1369 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1370 struct scsi_cmnd *cmnd = task->uldd_task;
1371 struct domain_device *device = task->dev;
1372 struct hisi_sas_slot *slot = task->lldd_task;
1373 u32 tag = slot->idx;
1374
1375 int_to_scsilun(cmnd->device->lun, &lun);
1376 tmf_task.tmf = TMF_QUERY_TASK;
1377 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1378
1379 rc = hisi_sas_debug_issue_ssp_tmf(device,
1380 lun.scsi_lun,
1381 &tmf_task);
1382 switch (rc) {
1383 /* The task is still in Lun, release it then */
1384 case TMF_RESP_FUNC_SUCC:
1385 /* The task is not in Lun or failed, reset the phy */
1386 case TMF_RESP_FUNC_FAILED:
1387 case TMF_RESP_FUNC_COMPLETE:
1388 break;
1389 default:
1390 rc = TMF_RESP_FUNC_FAILED;
1391 break;
1392 }
1393 }
1394 return rc;
1395 }
1396
1397 static int
1398 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1399 struct sas_task *task, int abort_flag,
1400 int task_tag)
1401 {
1402 struct domain_device *device = task->dev;
1403 struct hisi_sas_device *sas_dev = device->lldd_dev;
1404 struct device *dev = hisi_hba->dev;
1405 struct hisi_sas_port *port;
1406 struct hisi_sas_slot *slot;
1407 struct asd_sas_port *sas_port = device->port;
1408 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1409 struct hisi_sas_dq *dq = sas_dev->dq;
1410 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1411 unsigned long flags, flags_dq;
1412
1413 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1414 return -EINVAL;
1415
1416 if (!device->port)
1417 return -1;
1418
1419 port = to_hisi_sas_port(sas_port);
1420
1421 /* simply get a slot and send abort command */
1422 spin_lock_irqsave(&hisi_hba->lock, flags);
1423 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1424 if (rc) {
1425 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1426 goto err_out;
1427 }
1428 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1429
1430 spin_lock_irqsave(&dq->lock, flags_dq);
1431 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1432 if (rc)
1433 goto err_out_tag;
1434
1435 dlvry_queue = dq->id;
1436 dlvry_queue_slot = dq->wr_point;
1437
1438 slot = &hisi_hba->slot_info[slot_idx];
1439 memset(slot, 0, sizeof(struct hisi_sas_slot));
1440
1441 slot->idx = slot_idx;
1442 slot->n_elem = n_elem;
1443 slot->dlvry_queue = dlvry_queue;
1444 slot->dlvry_queue_slot = dlvry_queue_slot;
1445 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1446 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1447 slot->task = task;
1448 slot->port = port;
1449 task->lldd_task = slot;
1450
1451 slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
1452 GFP_ATOMIC, &slot->buf_dma);
1453 if (!slot->buf) {
1454 rc = -ENOMEM;
1455 goto err_out_tag;
1456 }
1457
1458 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1459 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1460 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
1461
1462 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1463 abort_flag, task_tag);
1464 if (rc)
1465 goto err_out_buf;
1466
1467 spin_lock_irqsave(&hisi_hba->lock, flags);
1468 list_add_tail(&slot->entry, &sas_dev->list);
1469 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1470 spin_lock_irqsave(&task->task_state_lock, flags);
1471 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1472 spin_unlock_irqrestore(&task->task_state_lock, flags);
1473
1474 dq->slot_prep = slot;
1475
1476 atomic64_inc(&sas_dev->running_req);
1477
1478 /* send abort command to the chip */
1479 hisi_hba->hw->start_delivery(dq);
1480 spin_unlock_irqrestore(&dq->lock, flags_dq);
1481
1482 return 0;
1483
1484 err_out_buf:
1485 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
1486 slot->buf_dma);
1487 err_out_tag:
1488 spin_lock_irqsave(&hisi_hba->lock, flags);
1489 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1490 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1491 spin_unlock_irqrestore(&dq->lock, flags_dq);
1492 err_out:
1493 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1494
1495 return rc;
1496 }
1497
1498 /**
1499 * hisi_sas_internal_task_abort -- execute an internal
1500 * abort command for single IO command or a device
1501 * @hisi_hba: host controller struct
1502 * @device: domain device
1503 * @abort_flag: mode of operation, device or single IO
1504 * @tag: tag of IO to be aborted (only relevant to single
1505 * IO mode)
1506 */
1507 static int
1508 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1509 struct domain_device *device,
1510 int abort_flag, int tag)
1511 {
1512 struct sas_task *task;
1513 struct hisi_sas_device *sas_dev = device->lldd_dev;
1514 struct device *dev = hisi_hba->dev;
1515 int res;
1516
1517 /*
1518 * The interface is not realized means this HW don't support internal
1519 * abort, or don't need to do internal abort. Then here, we return
1520 * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
1521 * the internal abort has been executed and returned CQ.
1522 */
1523 if (!hisi_hba->hw->prep_abort)
1524 return TMF_RESP_FUNC_FAILED;
1525
1526 task = sas_alloc_slow_task(GFP_KERNEL);
1527 if (!task)
1528 return -ENOMEM;
1529
1530 task->dev = device;
1531 task->task_proto = device->tproto;
1532 task->task_done = hisi_sas_task_done;
1533 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1534 task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
1535 add_timer(&task->slow_task->timer);
1536
1537 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1538 task, abort_flag, tag);
1539 if (res) {
1540 del_timer(&task->slow_task->timer);
1541 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1542 res);
1543 goto exit;
1544 }
1545 wait_for_completion(&task->slow_task->completion);
1546 res = TMF_RESP_FUNC_FAILED;
1547
1548 /* Internal abort timed out */
1549 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1550 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1551 struct hisi_sas_slot *slot = task->lldd_task;
1552
1553 if (slot)
1554 slot->task = NULL;
1555 dev_err(dev, "internal task abort: timeout and not done.\n");
1556 res = -EIO;
1557 goto exit;
1558 } else
1559 dev_err(dev, "internal task abort: timeout.\n");
1560 }
1561
1562 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1563 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1564 res = TMF_RESP_FUNC_COMPLETE;
1565 goto exit;
1566 }
1567
1568 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1569 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1570 res = TMF_RESP_FUNC_SUCC;
1571 goto exit;
1572 }
1573
1574 exit:
1575 dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1576 "resp: 0x%x sts 0x%x\n",
1577 SAS_ADDR(device->sas_addr),
1578 task,
1579 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1580 task->task_status.stat);
1581 sas_free_task(task);
1582
1583 return res;
1584 }
1585
1586 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1587 {
1588 hisi_sas_port_notify_formed(sas_phy);
1589 }
1590
1591 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
1592 u8 reg_index, u8 reg_count, u8 *write_data)
1593 {
1594 struct hisi_hba *hisi_hba = sha->lldd_ha;
1595
1596 if (!hisi_hba->hw->write_gpio)
1597 return -EOPNOTSUPP;
1598
1599 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
1600 reg_index, reg_count, write_data);
1601 }
1602
1603 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1604 {
1605 phy->phy_attached = 0;
1606 phy->phy_type = 0;
1607 phy->port = NULL;
1608 }
1609
1610 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1611 {
1612 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1613 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1614 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1615
1616 if (rdy) {
1617 /* Phy down but ready */
1618 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1619 hisi_sas_port_notify_formed(sas_phy);
1620 } else {
1621 struct hisi_sas_port *port = phy->port;
1622
1623 /* Phy down and not ready */
1624 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1625 sas_phy_disconnected(sas_phy);
1626
1627 if (port) {
1628 if (phy->phy_type & PORT_TYPE_SAS) {
1629 int port_id = port->id;
1630
1631 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1632 port_id))
1633 port->port_attached = 0;
1634 } else if (phy->phy_type & PORT_TYPE_SATA)
1635 port->port_attached = 0;
1636 }
1637 hisi_sas_phy_disconnected(phy);
1638 }
1639 }
1640 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1641
1642 void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba)
1643 {
1644 int i;
1645
1646 for (i = 0; i < hisi_hba->queue_count; i++) {
1647 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1648
1649 tasklet_kill(&cq->tasklet);
1650 }
1651 }
1652 EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
1653
1654 struct scsi_transport_template *hisi_sas_stt;
1655 EXPORT_SYMBOL_GPL(hisi_sas_stt);
1656
1657 struct device_attribute *host_attrs[] = {
1658 &dev_attr_phy_event_threshold,
1659 NULL,
1660 };
1661
1662 static struct scsi_host_template _hisi_sas_sht = {
1663 .module = THIS_MODULE,
1664 .name = DRV_NAME,
1665 .queuecommand = sas_queuecommand,
1666 .target_alloc = sas_target_alloc,
1667 .slave_configure = hisi_sas_slave_configure,
1668 .scan_finished = hisi_sas_scan_finished,
1669 .scan_start = hisi_sas_scan_start,
1670 .change_queue_depth = sas_change_queue_depth,
1671 .bios_param = sas_bios_param,
1672 .can_queue = 1,
1673 .this_id = -1,
1674 .sg_tablesize = SG_ALL,
1675 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1676 .use_clustering = ENABLE_CLUSTERING,
1677 .eh_device_reset_handler = sas_eh_device_reset_handler,
1678 .eh_target_reset_handler = sas_eh_target_reset_handler,
1679 .target_destroy = sas_target_destroy,
1680 .ioctl = sas_ioctl,
1681 .shost_attrs = host_attrs,
1682 };
1683 struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
1684 EXPORT_SYMBOL_GPL(hisi_sas_sht);
1685
1686 static struct sas_domain_function_template hisi_sas_transport_ops = {
1687 .lldd_dev_found = hisi_sas_dev_found,
1688 .lldd_dev_gone = hisi_sas_dev_gone,
1689 .lldd_execute_task = hisi_sas_queue_command,
1690 .lldd_control_phy = hisi_sas_control_phy,
1691 .lldd_abort_task = hisi_sas_abort_task,
1692 .lldd_abort_task_set = hisi_sas_abort_task_set,
1693 .lldd_clear_aca = hisi_sas_clear_aca,
1694 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1695 .lldd_lu_reset = hisi_sas_lu_reset,
1696 .lldd_query_task = hisi_sas_query_task,
1697 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
1698 .lldd_port_formed = hisi_sas_port_formed,
1699 .lldd_write_gpio = hisi_sas_write_gpio,
1700 };
1701
1702 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
1703 {
1704 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1705
1706 for (i = 0; i < hisi_hba->queue_count; i++) {
1707 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1708 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1709
1710 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1711 memset(hisi_hba->cmd_hdr[i], 0, s);
1712 dq->wr_point = 0;
1713
1714 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1715 memset(hisi_hba->complete_hdr[i], 0, s);
1716 cq->rd_point = 0;
1717 }
1718
1719 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
1720 memset(hisi_hba->initial_fis, 0, s);
1721
1722 s = max_command_entries * sizeof(struct hisi_sas_iost);
1723 memset(hisi_hba->iost, 0, s);
1724
1725 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1726 memset(hisi_hba->breakpoint, 0, s);
1727
1728 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1729 memset(hisi_hba->sata_breakpoint, 0, s);
1730 }
1731 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
1732
1733 int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1734 {
1735 struct device *dev = hisi_hba->dev;
1736 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1737
1738 spin_lock_init(&hisi_hba->lock);
1739 for (i = 0; i < hisi_hba->n_phy; i++) {
1740 hisi_sas_phy_init(hisi_hba, i);
1741 hisi_hba->port[i].port_attached = 0;
1742 hisi_hba->port[i].id = -1;
1743 }
1744
1745 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1746 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1747 hisi_hba->devices[i].device_id = i;
1748 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1749 }
1750
1751 for (i = 0; i < hisi_hba->queue_count; i++) {
1752 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1753 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1754
1755 /* Completion queue structure */
1756 cq->id = i;
1757 cq->hisi_hba = hisi_hba;
1758
1759 /* Delivery queue structure */
1760 dq->id = i;
1761 dq->hisi_hba = hisi_hba;
1762
1763 /* Delivery queue */
1764 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1765 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1766 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1767 if (!hisi_hba->cmd_hdr[i])
1768 goto err_out;
1769
1770 /* Completion queue */
1771 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1772 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1773 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1774 if (!hisi_hba->complete_hdr[i])
1775 goto err_out;
1776 }
1777
1778 s = sizeof(struct hisi_sas_slot_buf_table);
1779 hisi_hba->buffer_pool = dma_pool_create("dma_buffer", dev, s, 16, 0);
1780 if (!hisi_hba->buffer_pool)
1781 goto err_out;
1782
1783 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1784 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1785 GFP_KERNEL);
1786 if (!hisi_hba->itct)
1787 goto err_out;
1788
1789 memset(hisi_hba->itct, 0, s);
1790
1791 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1792 sizeof(struct hisi_sas_slot),
1793 GFP_KERNEL);
1794 if (!hisi_hba->slot_info)
1795 goto err_out;
1796
1797 s = max_command_entries * sizeof(struct hisi_sas_iost);
1798 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1799 GFP_KERNEL);
1800 if (!hisi_hba->iost)
1801 goto err_out;
1802
1803 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1804 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1805 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1806 if (!hisi_hba->breakpoint)
1807 goto err_out;
1808
1809 hisi_hba->slot_index_count = max_command_entries;
1810 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1811 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1812 if (!hisi_hba->slot_index_tags)
1813 goto err_out;
1814
1815 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1816 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1817 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1818 if (!hisi_hba->initial_fis)
1819 goto err_out;
1820
1821 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1822 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1823 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1824 if (!hisi_hba->sata_breakpoint)
1825 goto err_out;
1826 hisi_sas_init_mem(hisi_hba);
1827
1828 hisi_sas_slot_index_init(hisi_hba);
1829
1830 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1831 if (!hisi_hba->wq) {
1832 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1833 goto err_out;
1834 }
1835
1836 return 0;
1837 err_out:
1838 return -ENOMEM;
1839 }
1840 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
1841
1842 void hisi_sas_free(struct hisi_hba *hisi_hba)
1843 {
1844 struct device *dev = hisi_hba->dev;
1845 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1846
1847 for (i = 0; i < hisi_hba->queue_count; i++) {
1848 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1849 if (hisi_hba->cmd_hdr[i])
1850 dma_free_coherent(dev, s,
1851 hisi_hba->cmd_hdr[i],
1852 hisi_hba->cmd_hdr_dma[i]);
1853
1854 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1855 if (hisi_hba->complete_hdr[i])
1856 dma_free_coherent(dev, s,
1857 hisi_hba->complete_hdr[i],
1858 hisi_hba->complete_hdr_dma[i]);
1859 }
1860
1861 dma_pool_destroy(hisi_hba->buffer_pool);
1862
1863 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1864 if (hisi_hba->itct)
1865 dma_free_coherent(dev, s,
1866 hisi_hba->itct, hisi_hba->itct_dma);
1867
1868 s = max_command_entries * sizeof(struct hisi_sas_iost);
1869 if (hisi_hba->iost)
1870 dma_free_coherent(dev, s,
1871 hisi_hba->iost, hisi_hba->iost_dma);
1872
1873 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1874 if (hisi_hba->breakpoint)
1875 dma_free_coherent(dev, s,
1876 hisi_hba->breakpoint,
1877 hisi_hba->breakpoint_dma);
1878
1879
1880 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1881 if (hisi_hba->initial_fis)
1882 dma_free_coherent(dev, s,
1883 hisi_hba->initial_fis,
1884 hisi_hba->initial_fis_dma);
1885
1886 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1887 if (hisi_hba->sata_breakpoint)
1888 dma_free_coherent(dev, s,
1889 hisi_hba->sata_breakpoint,
1890 hisi_hba->sata_breakpoint_dma);
1891
1892 if (hisi_hba->wq)
1893 destroy_workqueue(hisi_hba->wq);
1894 }
1895 EXPORT_SYMBOL_GPL(hisi_sas_free);
1896
1897 void hisi_sas_rst_work_handler(struct work_struct *work)
1898 {
1899 struct hisi_hba *hisi_hba =
1900 container_of(work, struct hisi_hba, rst_work);
1901
1902 hisi_sas_controller_reset(hisi_hba);
1903 }
1904 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
1905
1906 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
1907 {
1908 struct hisi_sas_rst *rst =
1909 container_of(work, struct hisi_sas_rst, work);
1910
1911 if (!hisi_sas_controller_reset(rst->hisi_hba))
1912 rst->done = true;
1913 complete(rst->completion);
1914 }
1915 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
1916
1917 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
1918 {
1919 struct device *dev = hisi_hba->dev;
1920 struct platform_device *pdev = hisi_hba->platform_dev;
1921 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
1922 struct clk *refclk;
1923
1924 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1925 SAS_ADDR_SIZE)) {
1926 dev_err(dev, "could not get property sas-addr\n");
1927 return -ENOENT;
1928 }
1929
1930 if (np) {
1931 /*
1932 * These properties are only required for platform device-based
1933 * controller with DT firmware.
1934 */
1935 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1936 "hisilicon,sas-syscon");
1937 if (IS_ERR(hisi_hba->ctrl)) {
1938 dev_err(dev, "could not get syscon\n");
1939 return -ENOENT;
1940 }
1941
1942 if (device_property_read_u32(dev, "ctrl-reset-reg",
1943 &hisi_hba->ctrl_reset_reg)) {
1944 dev_err(dev,
1945 "could not get property ctrl-reset-reg\n");
1946 return -ENOENT;
1947 }
1948
1949 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1950 &hisi_hba->ctrl_reset_sts_reg)) {
1951 dev_err(dev,
1952 "could not get property ctrl-reset-sts-reg\n");
1953 return -ENOENT;
1954 }
1955
1956 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1957 &hisi_hba->ctrl_clock_ena_reg)) {
1958 dev_err(dev,
1959 "could not get property ctrl-clock-ena-reg\n");
1960 return -ENOENT;
1961 }
1962 }
1963
1964 refclk = devm_clk_get(dev, NULL);
1965 if (IS_ERR(refclk))
1966 dev_dbg(dev, "no ref clk property\n");
1967 else
1968 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
1969
1970 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
1971 dev_err(dev, "could not get property phy-count\n");
1972 return -ENOENT;
1973 }
1974
1975 if (device_property_read_u32(dev, "queue-count",
1976 &hisi_hba->queue_count)) {
1977 dev_err(dev, "could not get property queue-count\n");
1978 return -ENOENT;
1979 }
1980
1981 return 0;
1982 }
1983 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
1984
1985 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1986 const struct hisi_sas_hw *hw)
1987 {
1988 struct resource *res;
1989 struct Scsi_Host *shost;
1990 struct hisi_hba *hisi_hba;
1991 struct device *dev = &pdev->dev;
1992
1993 shost = scsi_host_alloc(hisi_sas_sht, sizeof(*hisi_hba));
1994 if (!shost) {
1995 dev_err(dev, "scsi host alloc failed\n");
1996 return NULL;
1997 }
1998 hisi_hba = shost_priv(shost);
1999
2000 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2001 hisi_hba->hw = hw;
2002 hisi_hba->dev = dev;
2003 hisi_hba->platform_dev = pdev;
2004 hisi_hba->shost = shost;
2005 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2006
2007 timer_setup(&hisi_hba->timer, NULL, 0);
2008
2009 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2010 goto err_out;
2011
2012 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
2013 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
2014 dev_err(dev, "No usable DMA addressing method\n");
2015 goto err_out;
2016 }
2017
2018 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2019 hisi_hba->regs = devm_ioremap_resource(dev, res);
2020 if (IS_ERR(hisi_hba->regs))
2021 goto err_out;
2022
2023 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2024 if (res) {
2025 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2026 if (IS_ERR(hisi_hba->sgpio_regs))
2027 goto err_out;
2028 }
2029
2030 if (hisi_sas_alloc(hisi_hba, shost)) {
2031 hisi_sas_free(hisi_hba);
2032 goto err_out;
2033 }
2034
2035 return shost;
2036 err_out:
2037 scsi_host_put(shost);
2038 dev_err(dev, "shost alloc failed\n");
2039 return NULL;
2040 }
2041
2042 void hisi_sas_init_add(struct hisi_hba *hisi_hba)
2043 {
2044 int i;
2045
2046 for (i = 0; i < hisi_hba->n_phy; i++)
2047 memcpy(&hisi_hba->phy[i].dev_sas_addr,
2048 hisi_hba->sas_addr,
2049 SAS_ADDR_SIZE);
2050 }
2051 EXPORT_SYMBOL_GPL(hisi_sas_init_add);
2052
2053 int hisi_sas_probe(struct platform_device *pdev,
2054 const struct hisi_sas_hw *hw)
2055 {
2056 struct Scsi_Host *shost;
2057 struct hisi_hba *hisi_hba;
2058 struct device *dev = &pdev->dev;
2059 struct asd_sas_phy **arr_phy;
2060 struct asd_sas_port **arr_port;
2061 struct sas_ha_struct *sha;
2062 int rc, phy_nr, port_nr, i;
2063
2064 shost = hisi_sas_shost_alloc(pdev, hw);
2065 if (!shost)
2066 return -ENOMEM;
2067
2068 sha = SHOST_TO_SAS_HA(shost);
2069 hisi_hba = shost_priv(shost);
2070 platform_set_drvdata(pdev, sha);
2071
2072 phy_nr = port_nr = hisi_hba->n_phy;
2073
2074 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2075 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2076 if (!arr_phy || !arr_port) {
2077 rc = -ENOMEM;
2078 goto err_out_ha;
2079 }
2080
2081 sha->sas_phy = arr_phy;
2082 sha->sas_port = arr_port;
2083 sha->lldd_ha = hisi_hba;
2084
2085 shost->transportt = hisi_sas_stt;
2086 shost->max_id = HISI_SAS_MAX_DEVICES;
2087 shost->max_lun = ~0;
2088 shost->max_channel = 1;
2089 shost->max_cmd_len = 16;
2090 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
2091 shost->can_queue = hisi_hba->hw->max_command_entries;
2092 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
2093
2094 sha->sas_ha_name = DRV_NAME;
2095 sha->dev = hisi_hba->dev;
2096 sha->lldd_module = THIS_MODULE;
2097 sha->sas_addr = &hisi_hba->sas_addr[0];
2098 sha->num_phys = hisi_hba->n_phy;
2099 sha->core.shost = hisi_hba->shost;
2100
2101 for (i = 0; i < hisi_hba->n_phy; i++) {
2102 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2103 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2104 }
2105
2106 hisi_sas_init_add(hisi_hba);
2107
2108 rc = scsi_add_host(shost, &pdev->dev);
2109 if (rc)
2110 goto err_out_ha;
2111
2112 rc = sas_register_ha(sha);
2113 if (rc)
2114 goto err_out_register_ha;
2115
2116 rc = hisi_hba->hw->hw_init(hisi_hba);
2117 if (rc)
2118 goto err_out_register_ha;
2119
2120 scsi_scan_host(shost);
2121
2122 return 0;
2123
2124 err_out_register_ha:
2125 scsi_remove_host(shost);
2126 err_out_ha:
2127 hisi_sas_free(hisi_hba);
2128 scsi_host_put(shost);
2129 return rc;
2130 }
2131 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2132
2133 int hisi_sas_remove(struct platform_device *pdev)
2134 {
2135 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2136 struct hisi_hba *hisi_hba = sha->lldd_ha;
2137 struct Scsi_Host *shost = sha->core.shost;
2138
2139 sas_unregister_ha(sha);
2140 sas_remove_host(sha->core.shost);
2141
2142 hisi_sas_free(hisi_hba);
2143 scsi_host_put(shost);
2144 return 0;
2145 }
2146 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2147
2148 static __init int hisi_sas_init(void)
2149 {
2150 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2151 if (!hisi_sas_stt)
2152 return -ENOMEM;
2153
2154 return 0;
2155 }
2156
2157 static __exit void hisi_sas_exit(void)
2158 {
2159 sas_release_transport(hisi_sas_stt);
2160 }
2161
2162 module_init(hisi_sas_init);
2163 module_exit(hisi_sas_exit);
2164
2165 MODULE_LICENSE("GPL");
2166 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2167 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2168 MODULE_ALIAS("platform:" DRV_NAME);
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