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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
blob2d4dbed03ee36d2cd86efe34ac1174ce86f062fa
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(struct host_to_dev_fis *fis, int direction)
29 {
30 switch (fis->command) {
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 {
83 if (fis->command == ATA_CMD_SET_MAX) {
84 switch (fis->features) {
85 case ATA_SET_MAX_PASSWD:
86 case ATA_SET_MAX_LOCK:
87 return HISI_SAS_SATA_PROTOCOL_PIO;
88
89 case ATA_SET_MAX_PASSWD_DMA:
90 case ATA_SET_MAX_UNLOCK_DMA:
91 return HISI_SAS_SATA_PROTOCOL_DMA;
92
93 default:
94 return HISI_SAS_SATA_PROTOCOL_NONDATA;
95 }
96 }
97 if (direction == DMA_NONE)
98 return HISI_SAS_SATA_PROTOCOL_NONDATA;
99 return HISI_SAS_SATA_PROTOCOL_PIO;
100 }
101 }
102 }
103 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
104
105 void hisi_sas_sata_done(struct sas_task *task,
106 struct hisi_sas_slot *slot)
107 {
108 struct task_status_struct *ts = &task->task_status;
109 struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
110 struct hisi_sas_status_buffer *status_buf =
111 hisi_sas_status_buf_addr_mem(slot);
112 u8 *iu = &status_buf->iu[0];
113 struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu;
114
115 resp->frame_len = sizeof(struct dev_to_host_fis);
116 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
117
118 ts->buf_valid_size = sizeof(*resp);
119 }
120 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
121
122 int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag)
123 {
124 struct ata_queued_cmd *qc = task->uldd_task;
125
126 if (qc) {
127 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
128 qc->tf.command == ATA_CMD_FPDMA_READ) {
129 *tag = qc->tag;
130 return 1;
131 }
132 }
133 return 0;
134 }
135 EXPORT_SYMBOL_GPL(hisi_sas_get_ncq_tag);
136
137 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
138 {
139 return device->port->ha->lldd_ha;
140 }
141
142 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
143 {
144 return container_of(sas_port, struct hisi_sas_port, sas_port);
145 }
146 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
147
148 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
149 {
150 int phy_no;
151
152 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
153 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
154 }
155 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
156
157 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
158 {
159 void *bitmap = hisi_hba->slot_index_tags;
160
161 clear_bit(slot_idx, bitmap);
162 }
163
164 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
165 {
166 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
167 }
168
169 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
170 {
171 void *bitmap = hisi_hba->slot_index_tags;
172
173 set_bit(slot_idx, bitmap);
174 }
175
176 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
177 {
178 unsigned int index;
179 void *bitmap = hisi_hba->slot_index_tags;
180
181 index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
182 if (index >= hisi_hba->slot_index_count)
183 return -SAS_QUEUE_FULL;
184 hisi_sas_slot_index_set(hisi_hba, index);
185 *slot_idx = index;
186 return 0;
187 }
188
189 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
190 {
191 int i;
192
193 for (i = 0; i < hisi_hba->slot_index_count; ++i)
194 hisi_sas_slot_index_clear(hisi_hba, i);
195 }
196
197 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
198 struct hisi_sas_slot *slot)
199 {
200
201 if (task) {
202 struct device *dev = hisi_hba->dev;
203 struct domain_device *device = task->dev;
204 struct hisi_sas_device *sas_dev = device->lldd_dev;
205
206 if (!task->lldd_task)
207 return;
208
209 task->lldd_task = NULL;
210
211 if (!sas_protocol_ata(task->task_proto))
212 if (slot->n_elem)
213 dma_unmap_sg(dev, task->scatter,
214 task->num_scatter,
215 task->data_dir);
216
217 if (sas_dev)
218 atomic64_dec(&sas_dev->running_req);
219 }
220
221 if (slot->buf)
222 dma_pool_free(hisi_hba->buffer_pool, slot->buf, slot->buf_dma);
223
224 list_del_init(&slot->entry);
225 slot->buf = NULL;
226 slot->task = NULL;
227 slot->port = NULL;
228 hisi_sas_slot_index_free(hisi_hba, slot->idx);
229
230 /* slot memory is fully zeroed when it is reused */
231 }
232 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
233
234 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
235 struct hisi_sas_slot *slot)
236 {
237 return hisi_hba->hw->prep_smp(hisi_hba, slot);
238 }
239
240 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
241 struct hisi_sas_slot *slot, int is_tmf,
242 struct hisi_sas_tmf_task *tmf)
243 {
244 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
245 }
246
247 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
248 struct hisi_sas_slot *slot)
249 {
250 return hisi_hba->hw->prep_stp(hisi_hba, slot);
251 }
252
253 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
254 struct hisi_sas_slot *slot,
255 int device_id, int abort_flag, int tag_to_abort)
256 {
257 return hisi_hba->hw->prep_abort(hisi_hba, slot,
258 device_id, abort_flag, tag_to_abort);
259 }
260
261 /*
262 * This function will issue an abort TMF regardless of whether the
263 * task is in the sdev or not. Then it will do the task complete
264 * cleanup and callbacks.
265 */
266 static void hisi_sas_slot_abort(struct work_struct *work)
267 {
268 struct hisi_sas_slot *abort_slot =
269 container_of(work, struct hisi_sas_slot, abort_slot);
270 struct sas_task *task = abort_slot->task;
271 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
272 struct scsi_cmnd *cmnd = task->uldd_task;
273 struct hisi_sas_tmf_task tmf_task;
274 struct scsi_lun lun;
275 struct device *dev = hisi_hba->dev;
276 int tag = abort_slot->idx;
277 unsigned long flags;
278
279 if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
280 dev_err(dev, "cannot abort slot for non-ssp task\n");
281 goto out;
282 }
283
284 int_to_scsilun(cmnd->device->lun, &lun);
285 tmf_task.tmf = TMF_ABORT_TASK;
286 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
287
288 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
289 out:
290 /* Do cleanup for this task */
291 spin_lock_irqsave(&hisi_hba->lock, flags);
292 hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
293 spin_unlock_irqrestore(&hisi_hba->lock, flags);
294 if (task->task_done)
295 task->task_done(task);
296 }
297
298 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_sas_dq
299 *dq, int is_tmf, struct hisi_sas_tmf_task *tmf,
300 int *pass)
301 {
302 struct hisi_hba *hisi_hba = dq->hisi_hba;
303 struct domain_device *device = task->dev;
304 struct hisi_sas_device *sas_dev = device->lldd_dev;
305 struct hisi_sas_port *port;
306 struct hisi_sas_slot *slot;
307 struct hisi_sas_cmd_hdr *cmd_hdr_base;
308 struct asd_sas_port *sas_port = device->port;
309 struct device *dev = hisi_hba->dev;
310 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
311 unsigned long flags;
312
313 if (!sas_port) {
314 struct task_status_struct *ts = &task->task_status;
315
316 ts->resp = SAS_TASK_UNDELIVERED;
317 ts->stat = SAS_PHY_DOWN;
318 /*
319 * libsas will use dev->port, should
320 * not call task_done for sata
321 */
322 if (device->dev_type != SAS_SATA_DEV)
323 task->task_done(task);
324 return SAS_PHY_DOWN;
325 }
326
327 if (DEV_IS_GONE(sas_dev)) {
328 if (sas_dev)
329 dev_info(dev, "task prep: device %d not ready\n",
330 sas_dev->device_id);
331 else
332 dev_info(dev, "task prep: device %016llx not ready\n",
333 SAS_ADDR(device->sas_addr));
334
335 return SAS_PHY_DOWN;
336 }
337
338 port = to_hisi_sas_port(sas_port);
339 if (port && !port->port_attached) {
340 dev_info(dev, "task prep: %s port%d not attach device\n",
341 (dev_is_sata(device)) ?
342 "SATA/STP" : "SAS",
343 device->port->id);
344
345 return SAS_PHY_DOWN;
346 }
347
348 if (!sas_protocol_ata(task->task_proto)) {
349 if (task->num_scatter) {
350 n_elem = dma_map_sg(dev, task->scatter,
351 task->num_scatter, task->data_dir);
352 if (!n_elem) {
353 rc = -ENOMEM;
354 goto prep_out;
355 }
356 }
357 } else
358 n_elem = task->num_scatter;
359
360 spin_lock_irqsave(&hisi_hba->lock, flags);
361 if (hisi_hba->hw->slot_index_alloc)
362 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
363 device);
364 else
365 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
366 if (rc) {
367 spin_unlock_irqrestore(&hisi_hba->lock, flags);
368 goto err_out;
369 }
370 spin_unlock_irqrestore(&hisi_hba->lock, flags);
371
372 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
373 if (rc)
374 goto err_out_tag;
375
376 dlvry_queue = dq->id;
377 dlvry_queue_slot = dq->wr_point;
378 slot = &hisi_hba->slot_info[slot_idx];
379 memset(slot, 0, sizeof(struct hisi_sas_slot));
380
381 slot->idx = slot_idx;
382 slot->n_elem = n_elem;
383 slot->dlvry_queue = dlvry_queue;
384 slot->dlvry_queue_slot = dlvry_queue_slot;
385 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
386 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
387 slot->task = task;
388 slot->port = port;
389 task->lldd_task = slot;
390 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
391
392 slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
393 GFP_ATOMIC, &slot->buf_dma);
394 if (!slot->buf) {
395 rc = -ENOMEM;
396 goto err_out_slot_buf;
397 }
398 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
399 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
400 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
401
402 switch (task->task_proto) {
403 case SAS_PROTOCOL_SMP:
404 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
405 break;
406 case SAS_PROTOCOL_SSP:
407 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
408 break;
409 case SAS_PROTOCOL_SATA:
410 case SAS_PROTOCOL_STP:
411 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
412 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
413 break;
414 default:
415 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
416 task->task_proto);
417 rc = -EINVAL;
418 break;
419 }
420
421 if (rc) {
422 dev_err(dev, "task prep: rc = 0x%x\n", rc);
423 goto err_out_buf;
424 }
425
426 spin_lock_irqsave(&hisi_hba->lock, flags);
427 list_add_tail(&slot->entry, &sas_dev->list);
428 spin_unlock_irqrestore(&hisi_hba->lock, flags);
429 spin_lock_irqsave(&task->task_state_lock, flags);
430 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
431 spin_unlock_irqrestore(&task->task_state_lock, flags);
432
433 dq->slot_prep = slot;
434
435 atomic64_inc(&sas_dev->running_req);
436 ++(*pass);
437
438 return 0;
439
440 err_out_buf:
441 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
442 slot->buf_dma);
443 err_out_slot_buf:
444 /* Nothing to be done */
445 err_out_tag:
446 spin_lock_irqsave(&hisi_hba->lock, flags);
447 hisi_sas_slot_index_free(hisi_hba, slot_idx);
448 spin_unlock_irqrestore(&hisi_hba->lock, flags);
449 err_out:
450 dev_err(dev, "task prep: failed[%d]!\n", rc);
451 if (!sas_protocol_ata(task->task_proto))
452 if (n_elem)
453 dma_unmap_sg(dev, task->scatter,
454 task->num_scatter,
455 task->data_dir);
456 prep_out:
457 return rc;
458 }
459
460 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
461 int is_tmf, struct hisi_sas_tmf_task *tmf)
462 {
463 u32 rc;
464 u32 pass = 0;
465 unsigned long flags;
466 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
467 struct device *dev = hisi_hba->dev;
468 struct domain_device *device = task->dev;
469 struct hisi_sas_device *sas_dev = device->lldd_dev;
470 struct hisi_sas_dq *dq = sas_dev->dq;
471
472 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
473 return -EINVAL;
474
475 /* protect task_prep and start_delivery sequence */
476 spin_lock_irqsave(&dq->lock, flags);
477 rc = hisi_sas_task_prep(task, dq, is_tmf, tmf, &pass);
478 if (rc)
479 dev_err(dev, "task exec: failed[%d]!\n", rc);
480
481 if (likely(pass))
482 hisi_hba->hw->start_delivery(dq);
483 spin_unlock_irqrestore(&dq->lock, flags);
484
485 return rc;
486 }
487
488 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
489 {
490 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
491 struct asd_sas_phy *sas_phy = &phy->sas_phy;
492 struct sas_ha_struct *sas_ha;
493
494 if (!phy->phy_attached)
495 return;
496
497 sas_ha = &hisi_hba->sha;
498 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
499
500 if (sas_phy->phy) {
501 struct sas_phy *sphy = sas_phy->phy;
502
503 sphy->negotiated_linkrate = sas_phy->linkrate;
504 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
505 sphy->maximum_linkrate_hw =
506 hisi_hba->hw->phy_get_max_linkrate();
507 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
508 sphy->minimum_linkrate = phy->minimum_linkrate;
509
510 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
511 sphy->maximum_linkrate = phy->maximum_linkrate;
512 }
513
514 if (phy->phy_type & PORT_TYPE_SAS) {
515 struct sas_identify_frame *id;
516
517 id = (struct sas_identify_frame *)phy->frame_rcvd;
518 id->dev_type = phy->identify.device_type;
519 id->initiator_bits = SAS_PROTOCOL_ALL;
520 id->target_bits = phy->identify.target_port_protocols;
521 } else if (phy->phy_type & PORT_TYPE_SATA) {
522 /*Nothing*/
523 }
524
525 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
526 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
527 }
528
529 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
530 {
531 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
532 struct hisi_sas_device *sas_dev = NULL;
533 unsigned long flags;
534 int i;
535
536 spin_lock_irqsave(&hisi_hba->lock, flags);
537 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
538 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
539 int queue = i % hisi_hba->queue_count;
540 struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
541
542 hisi_hba->devices[i].device_id = i;
543 sas_dev = &hisi_hba->devices[i];
544 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
545 sas_dev->dev_type = device->dev_type;
546 sas_dev->hisi_hba = hisi_hba;
547 sas_dev->sas_device = device;
548 sas_dev->dq = dq;
549 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
550 break;
551 }
552 }
553 spin_unlock_irqrestore(&hisi_hba->lock, flags);
554
555 return sas_dev;
556 }
557
558 static int hisi_sas_dev_found(struct domain_device *device)
559 {
560 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
561 struct domain_device *parent_dev = device->parent;
562 struct hisi_sas_device *sas_dev;
563 struct device *dev = hisi_hba->dev;
564
565 if (hisi_hba->hw->alloc_dev)
566 sas_dev = hisi_hba->hw->alloc_dev(device);
567 else
568 sas_dev = hisi_sas_alloc_dev(device);
569 if (!sas_dev) {
570 dev_err(dev, "fail alloc dev: max support %d devices\n",
571 HISI_SAS_MAX_DEVICES);
572 return -EINVAL;
573 }
574
575 device->lldd_dev = sas_dev;
576 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
577
578 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
579 int phy_no;
580 u8 phy_num = parent_dev->ex_dev.num_phys;
581 struct ex_phy *phy;
582
583 for (phy_no = 0; phy_no < phy_num; phy_no++) {
584 phy = &parent_dev->ex_dev.ex_phy[phy_no];
585 if (SAS_ADDR(phy->attached_sas_addr) ==
586 SAS_ADDR(device->sas_addr)) {
587 sas_dev->attached_phy = phy_no;
588 break;
589 }
590 }
591
592 if (phy_no == phy_num) {
593 dev_info(dev, "dev found: no attached "
594 "dev:%016llx at ex:%016llx\n",
595 SAS_ADDR(device->sas_addr),
596 SAS_ADDR(parent_dev->sas_addr));
597 return -EINVAL;
598 }
599 }
600
601 dev_info(dev, "dev[%d:%x] found\n",
602 sas_dev->device_id, sas_dev->dev_type);
603
604 return 0;
605 }
606
607 static int hisi_sas_slave_configure(struct scsi_device *sdev)
608 {
609 struct domain_device *dev = sdev_to_domain_dev(sdev);
610 int ret = sas_slave_configure(sdev);
611
612 if (ret)
613 return ret;
614 if (!dev_is_sata(dev))
615 sas_change_queue_depth(sdev, 64);
616
617 return 0;
618 }
619
620 static void hisi_sas_scan_start(struct Scsi_Host *shost)
621 {
622 struct hisi_hba *hisi_hba = shost_priv(shost);
623
624 hisi_hba->hw->phys_init(hisi_hba);
625 }
626
627 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
628 {
629 struct hisi_hba *hisi_hba = shost_priv(shost);
630 struct sas_ha_struct *sha = &hisi_hba->sha;
631
632 /* Wait for PHY up interrupt to occur */
633 if (time < HZ)
634 return 0;
635
636 sas_drain_work(sha);
637 return 1;
638 }
639
640 static void hisi_sas_phyup_work(struct work_struct *work)
641 {
642 struct hisi_sas_phy *phy =
643 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
644 struct hisi_hba *hisi_hba = phy->hisi_hba;
645 struct asd_sas_phy *sas_phy = &phy->sas_phy;
646 int phy_no = sas_phy->id;
647
648 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
649 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
650 }
651
652 static void hisi_sas_linkreset_work(struct work_struct *work)
653 {
654 struct hisi_sas_phy *phy =
655 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
656 struct asd_sas_phy *sas_phy = &phy->sas_phy;
657
658 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
659 }
660
661 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
662 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
663 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
664 };
665
666 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
667 enum hisi_sas_phy_event event)
668 {
669 struct hisi_hba *hisi_hba = phy->hisi_hba;
670
671 if (WARN_ON(event >= HISI_PHYES_NUM))
672 return false;
673
674 return queue_work(hisi_hba->wq, &phy->works[event]);
675 }
676 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
677
678 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
679 {
680 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
681 struct asd_sas_phy *sas_phy = &phy->sas_phy;
682 int i;
683
684 phy->hisi_hba = hisi_hba;
685 phy->port = NULL;
686 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
687 sas_phy->class = SAS;
688 sas_phy->iproto = SAS_PROTOCOL_ALL;
689 sas_phy->tproto = 0;
690 sas_phy->type = PHY_TYPE_PHYSICAL;
691 sas_phy->role = PHY_ROLE_INITIATOR;
692 sas_phy->oob_mode = OOB_NOT_CONNECTED;
693 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
694 sas_phy->id = phy_no;
695 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
696 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
697 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
698 sas_phy->lldd_phy = phy;
699
700 for (i = 0; i < HISI_PHYES_NUM; i++)
701 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
702 }
703
704 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
705 {
706 struct sas_ha_struct *sas_ha = sas_phy->ha;
707 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
708 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
709 struct asd_sas_port *sas_port = sas_phy->port;
710 struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
711 unsigned long flags;
712
713 if (!sas_port)
714 return;
715
716 spin_lock_irqsave(&hisi_hba->lock, flags);
717 port->port_attached = 1;
718 port->id = phy->port_id;
719 phy->port = port;
720 sas_port->lldd_port = port;
721 spin_unlock_irqrestore(&hisi_hba->lock, flags);
722 }
723
724 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
725 struct hisi_sas_slot *slot)
726 {
727 if (task) {
728 unsigned long flags;
729 struct task_status_struct *ts;
730
731 ts = &task->task_status;
732
733 ts->resp = SAS_TASK_COMPLETE;
734 ts->stat = SAS_ABORTED_TASK;
735 spin_lock_irqsave(&task->task_state_lock, flags);
736 task->task_state_flags &=
737 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
738 task->task_state_flags |= SAS_TASK_STATE_DONE;
739 spin_unlock_irqrestore(&task->task_state_lock, flags);
740 }
741
742 hisi_sas_slot_task_free(hisi_hba, task, slot);
743 }
744
745 /* hisi_hba.lock should be locked */
746 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
747 struct domain_device *device)
748 {
749 struct hisi_sas_slot *slot, *slot2;
750 struct hisi_sas_device *sas_dev = device->lldd_dev;
751
752 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
753 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
754 }
755
756 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
757 {
758 struct hisi_sas_device *sas_dev;
759 struct domain_device *device;
760 int i;
761
762 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
763 sas_dev = &hisi_hba->devices[i];
764 device = sas_dev->sas_device;
765
766 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
767 !device)
768 continue;
769
770 hisi_sas_release_task(hisi_hba, device);
771 }
772 }
773 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
774
775 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
776 struct domain_device *device)
777 {
778 if (hisi_hba->hw->dereg_device)
779 hisi_hba->hw->dereg_device(hisi_hba, device);
780 }
781
782 static void hisi_sas_dev_gone(struct domain_device *device)
783 {
784 struct hisi_sas_device *sas_dev = device->lldd_dev;
785 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
786 struct device *dev = hisi_hba->dev;
787
788 dev_info(dev, "dev[%d:%x] is gone\n",
789 sas_dev->device_id, sas_dev->dev_type);
790
791 if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
792 hisi_sas_internal_task_abort(hisi_hba, device,
793 HISI_SAS_INT_ABT_DEV, 0);
794
795 hisi_sas_dereg_device(hisi_hba, device);
796
797 hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
798 device->lldd_dev = NULL;
799 }
800
801 if (hisi_hba->hw->free_device)
802 hisi_hba->hw->free_device(sas_dev);
803 sas_dev->dev_type = SAS_PHY_UNUSED;
804 }
805
806 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
807 {
808 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
809 }
810
811 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
812 void *funcdata)
813 {
814 struct sas_ha_struct *sas_ha = sas_phy->ha;
815 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
816 int phy_no = sas_phy->id;
817
818 switch (func) {
819 case PHY_FUNC_HARD_RESET:
820 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
821 break;
822
823 case PHY_FUNC_LINK_RESET:
824 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
825 msleep(100);
826 hisi_hba->hw->phy_start(hisi_hba, phy_no);
827 break;
828
829 case PHY_FUNC_DISABLE:
830 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
831 break;
832
833 case PHY_FUNC_SET_LINK_RATE:
834 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
835 break;
836 case PHY_FUNC_GET_EVENTS:
837 if (hisi_hba->hw->get_events) {
838 hisi_hba->hw->get_events(hisi_hba, phy_no);
839 break;
840 }
841 /* fallthru */
842 case PHY_FUNC_RELEASE_SPINUP_HOLD:
843 default:
844 return -EOPNOTSUPP;
845 }
846 return 0;
847 }
848
849 static void hisi_sas_task_done(struct sas_task *task)
850 {
851 if (!del_timer(&task->slow_task->timer))
852 return;
853 complete(&task->slow_task->completion);
854 }
855
856 static void hisi_sas_tmf_timedout(struct timer_list *t)
857 {
858 struct sas_task_slow *slow = from_timer(slow, t, timer);
859 struct sas_task *task = slow->task;
860 unsigned long flags;
861
862 spin_lock_irqsave(&task->task_state_lock, flags);
863 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
864 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
865 spin_unlock_irqrestore(&task->task_state_lock, flags);
866
867 complete(&task->slow_task->completion);
868 }
869
870 #define TASK_TIMEOUT 20
871 #define TASK_RETRY 3
872 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
873 void *parameter, u32 para_len,
874 struct hisi_sas_tmf_task *tmf)
875 {
876 struct hisi_sas_device *sas_dev = device->lldd_dev;
877 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
878 struct device *dev = hisi_hba->dev;
879 struct sas_task *task;
880 int res, retry;
881
882 for (retry = 0; retry < TASK_RETRY; retry++) {
883 task = sas_alloc_slow_task(GFP_KERNEL);
884 if (!task)
885 return -ENOMEM;
886
887 task->dev = device;
888 task->task_proto = device->tproto;
889
890 if (dev_is_sata(device)) {
891 task->ata_task.device_control_reg_update = 1;
892 memcpy(&task->ata_task.fis, parameter, para_len);
893 } else {
894 memcpy(&task->ssp_task, parameter, para_len);
895 }
896 task->task_done = hisi_sas_task_done;
897
898 task->slow_task->timer.function = hisi_sas_tmf_timedout;
899 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
900 add_timer(&task->slow_task->timer);
901
902 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
903
904 if (res) {
905 del_timer(&task->slow_task->timer);
906 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
907 res);
908 goto ex_err;
909 }
910
911 wait_for_completion(&task->slow_task->completion);
912 res = TMF_RESP_FUNC_FAILED;
913 /* Even TMF timed out, return direct. */
914 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
915 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
916 struct hisi_sas_slot *slot = task->lldd_task;
917
918 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
919 if (slot)
920 slot->task = NULL;
921
922 goto ex_err;
923 } else
924 dev_err(dev, "abort tmf: TMF task timeout\n");
925 }
926
927 if (task->task_status.resp == SAS_TASK_COMPLETE &&
928 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
929 res = TMF_RESP_FUNC_COMPLETE;
930 break;
931 }
932
933 if (task->task_status.resp == SAS_TASK_COMPLETE &&
934 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
935 res = TMF_RESP_FUNC_SUCC;
936 break;
937 }
938
939 if (task->task_status.resp == SAS_TASK_COMPLETE &&
940 task->task_status.stat == SAS_DATA_UNDERRUN) {
941 /* no error, but return the number of bytes of
942 * underrun
943 */
944 dev_warn(dev, "abort tmf: task to dev %016llx "
945 "resp: 0x%x sts 0x%x underrun\n",
946 SAS_ADDR(device->sas_addr),
947 task->task_status.resp,
948 task->task_status.stat);
949 res = task->task_status.residual;
950 break;
951 }
952
953 if (task->task_status.resp == SAS_TASK_COMPLETE &&
954 task->task_status.stat == SAS_DATA_OVERRUN) {
955 dev_warn(dev, "abort tmf: blocked task error\n");
956 res = -EMSGSIZE;
957 break;
958 }
959
960 dev_warn(dev, "abort tmf: task to dev "
961 "%016llx resp: 0x%x status 0x%x\n",
962 SAS_ADDR(device->sas_addr), task->task_status.resp,
963 task->task_status.stat);
964 sas_free_task(task);
965 task = NULL;
966 }
967 ex_err:
968 if (retry == TASK_RETRY)
969 dev_warn(dev, "abort tmf: executing internal task failed!\n");
970 sas_free_task(task);
971 return res;
972 }
973
974 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
975 bool reset, int pmp, u8 *fis)
976 {
977 struct ata_taskfile tf;
978
979 ata_tf_init(dev, &tf);
980 if (reset)
981 tf.ctl |= ATA_SRST;
982 else
983 tf.ctl &= ~ATA_SRST;
984 tf.command = ATA_CMD_DEV_RESET;
985 ata_tf_to_fis(&tf, pmp, 0, fis);
986 }
987
988 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
989 {
990 u8 fis[20] = {0};
991 struct ata_port *ap = device->sata_dev.ap;
992 struct ata_link *link;
993 int rc = TMF_RESP_FUNC_FAILED;
994 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
995 struct device *dev = hisi_hba->dev;
996 int s = sizeof(struct host_to_dev_fis);
997 unsigned long flags;
998
999 ata_for_each_link(link, ap, EDGE) {
1000 int pmp = sata_srst_pmp(link);
1001
1002 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1003 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1004 if (rc != TMF_RESP_FUNC_COMPLETE)
1005 break;
1006 }
1007
1008 if (rc == TMF_RESP_FUNC_COMPLETE) {
1009 ata_for_each_link(link, ap, EDGE) {
1010 int pmp = sata_srst_pmp(link);
1011
1012 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1013 rc = hisi_sas_exec_internal_tmf_task(device, fis,
1014 s, NULL);
1015 if (rc != TMF_RESP_FUNC_COMPLETE)
1016 dev_err(dev, "ata disk de-reset failed\n");
1017 }
1018 } else {
1019 dev_err(dev, "ata disk reset failed\n");
1020 }
1021
1022 if (rc == TMF_RESP_FUNC_COMPLETE) {
1023 spin_lock_irqsave(&hisi_hba->lock, flags);
1024 hisi_sas_release_task(hisi_hba, device);
1025 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1026 }
1027
1028 return rc;
1029 }
1030
1031 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1032 u8 *lun, struct hisi_sas_tmf_task *tmf)
1033 {
1034 struct sas_ssp_task ssp_task;
1035
1036 if (!(device->tproto & SAS_PROTOCOL_SSP))
1037 return TMF_RESP_FUNC_ESUPP;
1038
1039 memcpy(ssp_task.LUN, lun, 8);
1040
1041 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1042 sizeof(ssp_task), tmf);
1043 }
1044
1045 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1046 {
1047 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1048 int i;
1049
1050 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1051 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1052 struct domain_device *device = sas_dev->sas_device;
1053 struct asd_sas_port *sas_port;
1054 struct hisi_sas_port *port;
1055 struct hisi_sas_phy *phy = NULL;
1056 struct asd_sas_phy *sas_phy;
1057
1058 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1059 || !device || !device->port)
1060 continue;
1061
1062 sas_port = device->port;
1063 port = to_hisi_sas_port(sas_port);
1064
1065 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1066 if (state & BIT(sas_phy->id)) {
1067 phy = sas_phy->lldd_phy;
1068 break;
1069 }
1070
1071 if (phy) {
1072 port->id = phy->port_id;
1073
1074 /* Update linkrate of directly attached device. */
1075 if (!device->parent)
1076 device->linkrate = phy->sas_phy.linkrate;
1077
1078 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1079 } else
1080 port->id = 0xff;
1081 }
1082 }
1083
1084 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1085 u32 state)
1086 {
1087 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1088 struct asd_sas_port *_sas_port = NULL;
1089 int phy_no;
1090
1091 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1092 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1093 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1094 struct asd_sas_port *sas_port = sas_phy->port;
1095 bool do_port_check = !!(_sas_port != sas_port);
1096
1097 if (!sas_phy->phy->enabled)
1098 continue;
1099
1100 /* Report PHY state change to libsas */
1101 if (state & BIT(phy_no)) {
1102 if (do_port_check && sas_port && sas_port->port_dev) {
1103 struct domain_device *dev = sas_port->port_dev;
1104
1105 _sas_port = sas_port;
1106
1107 if (DEV_IS_EXPANDER(dev->dev_type))
1108 sas_ha->notify_port_event(sas_phy,
1109 PORTE_BROADCAST_RCVD);
1110 }
1111 } else if (old_state & (1 << phy_no))
1112 /* PHY down but was up before */
1113 hisi_sas_phy_down(hisi_hba, phy_no, 0);
1114
1115 }
1116 }
1117
1118 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1119 {
1120 struct device *dev = hisi_hba->dev;
1121 struct Scsi_Host *shost = hisi_hba->shost;
1122 u32 old_state, state;
1123 unsigned long flags;
1124 int rc;
1125
1126 if (!hisi_hba->hw->soft_reset)
1127 return -1;
1128
1129 if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1130 return -1;
1131
1132 dev_info(dev, "controller resetting...\n");
1133 old_state = hisi_hba->hw->get_phys_state(hisi_hba);
1134
1135 scsi_block_requests(shost);
1136 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1137 rc = hisi_hba->hw->soft_reset(hisi_hba);
1138 if (rc) {
1139 dev_warn(dev, "controller reset failed (%d)\n", rc);
1140 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1141 scsi_unblock_requests(shost);
1142 goto out;
1143 }
1144 spin_lock_irqsave(&hisi_hba->lock, flags);
1145 hisi_sas_release_tasks(hisi_hba);
1146 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1147
1148 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1149
1150 /* Init and wait for PHYs to come up and all libsas event finished. */
1151 hisi_hba->hw->phys_init(hisi_hba);
1152 msleep(1000);
1153 hisi_sas_refresh_port_id(hisi_hba);
1154 scsi_unblock_requests(shost);
1155
1156 state = hisi_hba->hw->get_phys_state(hisi_hba);
1157 hisi_sas_rescan_topology(hisi_hba, old_state, state);
1158 dev_info(dev, "controller reset complete\n");
1159
1160 out:
1161 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1162
1163 return rc;
1164 }
1165
1166 static int hisi_sas_abort_task(struct sas_task *task)
1167 {
1168 struct scsi_lun lun;
1169 struct hisi_sas_tmf_task tmf_task;
1170 struct domain_device *device = task->dev;
1171 struct hisi_sas_device *sas_dev = device->lldd_dev;
1172 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
1173 struct device *dev = hisi_hba->dev;
1174 int rc = TMF_RESP_FUNC_FAILED;
1175 unsigned long flags;
1176
1177 if (!sas_dev) {
1178 dev_warn(dev, "Device has been removed\n");
1179 return TMF_RESP_FUNC_FAILED;
1180 }
1181
1182 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1183 rc = TMF_RESP_FUNC_COMPLETE;
1184 goto out;
1185 }
1186
1187 sas_dev->dev_status = HISI_SAS_DEV_EH;
1188 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1189 struct scsi_cmnd *cmnd = task->uldd_task;
1190 struct hisi_sas_slot *slot = task->lldd_task;
1191 u32 tag = slot->idx;
1192 int rc2;
1193
1194 int_to_scsilun(cmnd->device->lun, &lun);
1195 tmf_task.tmf = TMF_ABORT_TASK;
1196 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1197
1198 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1199 &tmf_task);
1200
1201 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1202 HISI_SAS_INT_ABT_CMD, tag);
1203 if (rc2 < 0) {
1204 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1205 return TMF_RESP_FUNC_FAILED;
1206 }
1207
1208 /*
1209 * If the TMF finds that the IO is not in the device and also
1210 * the internal abort does not succeed, then it is safe to
1211 * free the slot.
1212 * Note: if the internal abort succeeds then the slot
1213 * will have already been completed
1214 */
1215 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1216 if (task->lldd_task) {
1217 spin_lock_irqsave(&hisi_hba->lock, flags);
1218 hisi_sas_do_release_task(hisi_hba, task, slot);
1219 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1220 }
1221 }
1222 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1223 task->task_proto & SAS_PROTOCOL_STP) {
1224 if (task->dev->dev_type == SAS_SATA_DEV) {
1225 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1226 HISI_SAS_INT_ABT_DEV, 0);
1227 if (rc < 0) {
1228 dev_err(dev, "abort task: internal abort failed\n");
1229 goto out;
1230 }
1231 hisi_sas_dereg_device(hisi_hba, device);
1232 rc = hisi_sas_softreset_ata_disk(device);
1233 }
1234 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1235 /* SMP */
1236 struct hisi_sas_slot *slot = task->lldd_task;
1237 u32 tag = slot->idx;
1238
1239 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1240 HISI_SAS_INT_ABT_CMD, tag);
1241 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1242 task->lldd_task) {
1243 spin_lock_irqsave(&hisi_hba->lock, flags);
1244 hisi_sas_do_release_task(hisi_hba, task, slot);
1245 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1246 }
1247 }
1248
1249 out:
1250 if (rc != TMF_RESP_FUNC_COMPLETE)
1251 dev_notice(dev, "abort task: rc=%d\n", rc);
1252 return rc;
1253 }
1254
1255 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1256 {
1257 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1258 struct device *dev = hisi_hba->dev;
1259 struct hisi_sas_tmf_task tmf_task;
1260 int rc = TMF_RESP_FUNC_FAILED;
1261 unsigned long flags;
1262
1263 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1264 HISI_SAS_INT_ABT_DEV, 0);
1265 if (rc < 0) {
1266 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1267 return TMF_RESP_FUNC_FAILED;
1268 }
1269 hisi_sas_dereg_device(hisi_hba, device);
1270
1271 tmf_task.tmf = TMF_ABORT_TASK_SET;
1272 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1273
1274 if (rc == TMF_RESP_FUNC_COMPLETE) {
1275 spin_lock_irqsave(&hisi_hba->lock, flags);
1276 hisi_sas_release_task(hisi_hba, device);
1277 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1278 }
1279
1280 return rc;
1281 }
1282
1283 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1284 {
1285 int rc = TMF_RESP_FUNC_FAILED;
1286 struct hisi_sas_tmf_task tmf_task;
1287
1288 tmf_task.tmf = TMF_CLEAR_ACA;
1289 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1290
1291 return rc;
1292 }
1293
1294 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1295 {
1296 struct sas_phy *phy = sas_get_local_phy(device);
1297 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1298 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1299 rc = sas_phy_reset(phy, reset_type);
1300 sas_put_local_phy(phy);
1301 msleep(2000);
1302 return rc;
1303 }
1304
1305 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1306 {
1307 struct hisi_sas_device *sas_dev = device->lldd_dev;
1308 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1309 struct device *dev = hisi_hba->dev;
1310 int rc = TMF_RESP_FUNC_FAILED;
1311 unsigned long flags;
1312
1313 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
1314 return TMF_RESP_FUNC_FAILED;
1315 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1316
1317 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1318 HISI_SAS_INT_ABT_DEV, 0);
1319 if (rc < 0) {
1320 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1321 return TMF_RESP_FUNC_FAILED;
1322 }
1323 hisi_sas_dereg_device(hisi_hba, device);
1324
1325 rc = hisi_sas_debug_I_T_nexus_reset(device);
1326
1327 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV)) {
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 return rc;
1333 }
1334
1335 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1336 {
1337 struct hisi_sas_device *sas_dev = device->lldd_dev;
1338 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1339 struct device *dev = hisi_hba->dev;
1340 unsigned long flags;
1341 int rc = TMF_RESP_FUNC_FAILED;
1342
1343 sas_dev->dev_status = HISI_SAS_DEV_EH;
1344 if (dev_is_sata(device)) {
1345 struct sas_phy *phy;
1346
1347 /* Clear internal IO and then hardreset */
1348 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1349 HISI_SAS_INT_ABT_DEV, 0);
1350 if (rc < 0) {
1351 dev_err(dev, "lu_reset: internal abort failed\n");
1352 goto out;
1353 }
1354 hisi_sas_dereg_device(hisi_hba, device);
1355
1356 phy = sas_get_local_phy(device);
1357
1358 rc = sas_phy_reset(phy, 1);
1359
1360 if (rc == 0) {
1361 spin_lock_irqsave(&hisi_hba->lock, flags);
1362 hisi_sas_release_task(hisi_hba, device);
1363 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1364 }
1365 sas_put_local_phy(phy);
1366 } else {
1367 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1368
1369 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1370 HISI_SAS_INT_ABT_DEV, 0);
1371 if (rc < 0) {
1372 dev_err(dev, "lu_reset: internal abort failed\n");
1373 goto out;
1374 }
1375 hisi_sas_dereg_device(hisi_hba, device);
1376
1377 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1378 if (rc == TMF_RESP_FUNC_COMPLETE) {
1379 spin_lock_irqsave(&hisi_hba->lock, flags);
1380 hisi_sas_release_task(hisi_hba, device);
1381 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1382 }
1383 }
1384 out:
1385 if (rc != TMF_RESP_FUNC_COMPLETE)
1386 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1387 sas_dev->device_id, rc);
1388 return rc;
1389 }
1390
1391 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1392 {
1393 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1394 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1395
1396 queue_work(hisi_hba->wq, &r.work);
1397 wait_for_completion(r.completion);
1398 if (r.done)
1399 return TMF_RESP_FUNC_COMPLETE;
1400
1401 return TMF_RESP_FUNC_FAILED;
1402 }
1403
1404 static int hisi_sas_query_task(struct sas_task *task)
1405 {
1406 struct scsi_lun lun;
1407 struct hisi_sas_tmf_task tmf_task;
1408 int rc = TMF_RESP_FUNC_FAILED;
1409
1410 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1411 struct scsi_cmnd *cmnd = task->uldd_task;
1412 struct domain_device *device = task->dev;
1413 struct hisi_sas_slot *slot = task->lldd_task;
1414 u32 tag = slot->idx;
1415
1416 int_to_scsilun(cmnd->device->lun, &lun);
1417 tmf_task.tmf = TMF_QUERY_TASK;
1418 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1419
1420 rc = hisi_sas_debug_issue_ssp_tmf(device,
1421 lun.scsi_lun,
1422 &tmf_task);
1423 switch (rc) {
1424 /* The task is still in Lun, release it then */
1425 case TMF_RESP_FUNC_SUCC:
1426 /* The task is not in Lun or failed, reset the phy */
1427 case TMF_RESP_FUNC_FAILED:
1428 case TMF_RESP_FUNC_COMPLETE:
1429 break;
1430 default:
1431 rc = TMF_RESP_FUNC_FAILED;
1432 break;
1433 }
1434 }
1435 return rc;
1436 }
1437
1438 static int
1439 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1440 struct sas_task *task, int abort_flag,
1441 int task_tag)
1442 {
1443 struct domain_device *device = task->dev;
1444 struct hisi_sas_device *sas_dev = device->lldd_dev;
1445 struct device *dev = hisi_hba->dev;
1446 struct hisi_sas_port *port;
1447 struct hisi_sas_slot *slot;
1448 struct asd_sas_port *sas_port = device->port;
1449 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1450 struct hisi_sas_dq *dq = sas_dev->dq;
1451 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1452 unsigned long flags, flags_dq;
1453
1454 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1455 return -EINVAL;
1456
1457 if (!device->port)
1458 return -1;
1459
1460 port = to_hisi_sas_port(sas_port);
1461
1462 /* simply get a slot and send abort command */
1463 spin_lock_irqsave(&hisi_hba->lock, flags);
1464 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1465 if (rc) {
1466 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1467 goto err_out;
1468 }
1469 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1470
1471 spin_lock_irqsave(&dq->lock, flags_dq);
1472 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1473 if (rc)
1474 goto err_out_tag;
1475
1476 dlvry_queue = dq->id;
1477 dlvry_queue_slot = dq->wr_point;
1478
1479 slot = &hisi_hba->slot_info[slot_idx];
1480 memset(slot, 0, sizeof(struct hisi_sas_slot));
1481
1482 slot->idx = slot_idx;
1483 slot->n_elem = n_elem;
1484 slot->dlvry_queue = dlvry_queue;
1485 slot->dlvry_queue_slot = dlvry_queue_slot;
1486 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1487 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1488 slot->task = task;
1489 slot->port = port;
1490 task->lldd_task = slot;
1491
1492 slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
1493 GFP_ATOMIC, &slot->buf_dma);
1494 if (!slot->buf) {
1495 rc = -ENOMEM;
1496 goto err_out_tag;
1497 }
1498
1499 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1500 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1501 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
1502
1503 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1504 abort_flag, task_tag);
1505 if (rc)
1506 goto err_out_buf;
1507
1508 spin_lock_irqsave(&hisi_hba->lock, flags);
1509 list_add_tail(&slot->entry, &sas_dev->list);
1510 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1511 spin_lock_irqsave(&task->task_state_lock, flags);
1512 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1513 spin_unlock_irqrestore(&task->task_state_lock, flags);
1514
1515 dq->slot_prep = slot;
1516
1517 atomic64_inc(&sas_dev->running_req);
1518
1519 /* send abort command to the chip */
1520 hisi_hba->hw->start_delivery(dq);
1521 spin_unlock_irqrestore(&dq->lock, flags_dq);
1522
1523 return 0;
1524
1525 err_out_buf:
1526 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
1527 slot->buf_dma);
1528 err_out_tag:
1529 spin_lock_irqsave(&hisi_hba->lock, flags);
1530 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1531 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1532 spin_unlock_irqrestore(&dq->lock, flags_dq);
1533 err_out:
1534 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1535
1536 return rc;
1537 }
1538
1539 /**
1540 * hisi_sas_internal_task_abort -- execute an internal
1541 * abort command for single IO command or a device
1542 * @hisi_hba: host controller struct
1543 * @device: domain device
1544 * @abort_flag: mode of operation, device or single IO
1545 * @tag: tag of IO to be aborted (only relevant to single
1546 * IO mode)
1547 */
1548 static int
1549 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1550 struct domain_device *device,
1551 int abort_flag, int tag)
1552 {
1553 struct sas_task *task;
1554 struct hisi_sas_device *sas_dev = device->lldd_dev;
1555 struct device *dev = hisi_hba->dev;
1556 int res;
1557
1558 /*
1559 * The interface is not realized means this HW don't support internal
1560 * abort, or don't need to do internal abort. Then here, we return
1561 * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
1562 * the internal abort has been executed and returned CQ.
1563 */
1564 if (!hisi_hba->hw->prep_abort)
1565 return TMF_RESP_FUNC_FAILED;
1566
1567 task = sas_alloc_slow_task(GFP_KERNEL);
1568 if (!task)
1569 return -ENOMEM;
1570
1571 task->dev = device;
1572 task->task_proto = device->tproto;
1573 task->task_done = hisi_sas_task_done;
1574 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1575 task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
1576 add_timer(&task->slow_task->timer);
1577
1578 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1579 task, abort_flag, tag);
1580 if (res) {
1581 del_timer(&task->slow_task->timer);
1582 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1583 res);
1584 goto exit;
1585 }
1586 wait_for_completion(&task->slow_task->completion);
1587 res = TMF_RESP_FUNC_FAILED;
1588
1589 /* Internal abort timed out */
1590 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1591 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1592 struct hisi_sas_slot *slot = task->lldd_task;
1593
1594 if (slot)
1595 slot->task = NULL;
1596 dev_err(dev, "internal task abort: timeout and not done.\n");
1597 res = -EIO;
1598 goto exit;
1599 } else
1600 dev_err(dev, "internal task abort: timeout.\n");
1601 }
1602
1603 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1604 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1605 res = TMF_RESP_FUNC_COMPLETE;
1606 goto exit;
1607 }
1608
1609 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1610 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1611 res = TMF_RESP_FUNC_SUCC;
1612 goto exit;
1613 }
1614
1615 exit:
1616 dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1617 "resp: 0x%x sts 0x%x\n",
1618 SAS_ADDR(device->sas_addr),
1619 task,
1620 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1621 task->task_status.stat);
1622 sas_free_task(task);
1623
1624 return res;
1625 }
1626
1627 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1628 {
1629 hisi_sas_port_notify_formed(sas_phy);
1630 }
1631
1632 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
1633 {
1634 }
1635
1636 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
1637 u8 reg_index, u8 reg_count, u8 *write_data)
1638 {
1639 struct hisi_hba *hisi_hba = sha->lldd_ha;
1640
1641 if (!hisi_hba->hw->write_gpio)
1642 return -EOPNOTSUPP;
1643
1644 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
1645 reg_index, reg_count, write_data);
1646 }
1647
1648 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1649 {
1650 phy->phy_attached = 0;
1651 phy->phy_type = 0;
1652 phy->port = NULL;
1653 }
1654
1655 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1656 {
1657 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1658 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1659 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1660
1661 if (rdy) {
1662 /* Phy down but ready */
1663 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1664 hisi_sas_port_notify_formed(sas_phy);
1665 } else {
1666 struct hisi_sas_port *port = phy->port;
1667
1668 /* Phy down and not ready */
1669 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1670 sas_phy_disconnected(sas_phy);
1671
1672 if (port) {
1673 if (phy->phy_type & PORT_TYPE_SAS) {
1674 int port_id = port->id;
1675
1676 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1677 port_id))
1678 port->port_attached = 0;
1679 } else if (phy->phy_type & PORT_TYPE_SATA)
1680 port->port_attached = 0;
1681 }
1682 hisi_sas_phy_disconnected(phy);
1683 }
1684 }
1685 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1686
1687 void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba)
1688 {
1689 int i;
1690
1691 for (i = 0; i < hisi_hba->queue_count; i++) {
1692 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1693
1694 tasklet_kill(&cq->tasklet);
1695 }
1696 }
1697 EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
1698
1699 struct scsi_transport_template *hisi_sas_stt;
1700 EXPORT_SYMBOL_GPL(hisi_sas_stt);
1701
1702 static struct device_attribute *host_attrs[] = {
1703 &dev_attr_phy_event_threshold,
1704 NULL,
1705 };
1706
1707 static struct scsi_host_template _hisi_sas_sht = {
1708 .module = THIS_MODULE,
1709 .name = DRV_NAME,
1710 .queuecommand = sas_queuecommand,
1711 .target_alloc = sas_target_alloc,
1712 .slave_configure = hisi_sas_slave_configure,
1713 .scan_finished = hisi_sas_scan_finished,
1714 .scan_start = hisi_sas_scan_start,
1715 .change_queue_depth = sas_change_queue_depth,
1716 .bios_param = sas_bios_param,
1717 .can_queue = 1,
1718 .this_id = -1,
1719 .sg_tablesize = SG_ALL,
1720 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1721 .use_clustering = ENABLE_CLUSTERING,
1722 .eh_device_reset_handler = sas_eh_device_reset_handler,
1723 .eh_target_reset_handler = sas_eh_target_reset_handler,
1724 .target_destroy = sas_target_destroy,
1725 .ioctl = sas_ioctl,
1726 .shost_attrs = host_attrs,
1727 };
1728 struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
1729 EXPORT_SYMBOL_GPL(hisi_sas_sht);
1730
1731 static struct sas_domain_function_template hisi_sas_transport_ops = {
1732 .lldd_dev_found = hisi_sas_dev_found,
1733 .lldd_dev_gone = hisi_sas_dev_gone,
1734 .lldd_execute_task = hisi_sas_queue_command,
1735 .lldd_control_phy = hisi_sas_control_phy,
1736 .lldd_abort_task = hisi_sas_abort_task,
1737 .lldd_abort_task_set = hisi_sas_abort_task_set,
1738 .lldd_clear_aca = hisi_sas_clear_aca,
1739 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1740 .lldd_lu_reset = hisi_sas_lu_reset,
1741 .lldd_query_task = hisi_sas_query_task,
1742 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
1743 .lldd_port_formed = hisi_sas_port_formed,
1744 .lldd_port_deformed = hisi_sas_port_deformed,
1745 .lldd_write_gpio = hisi_sas_write_gpio,
1746 };
1747
1748 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
1749 {
1750 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1751
1752 for (i = 0; i < hisi_hba->queue_count; i++) {
1753 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1754 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1755
1756 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1757 memset(hisi_hba->cmd_hdr[i], 0, s);
1758 dq->wr_point = 0;
1759
1760 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1761 memset(hisi_hba->complete_hdr[i], 0, s);
1762 cq->rd_point = 0;
1763 }
1764
1765 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
1766 memset(hisi_hba->initial_fis, 0, s);
1767
1768 s = max_command_entries * sizeof(struct hisi_sas_iost);
1769 memset(hisi_hba->iost, 0, s);
1770
1771 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1772 memset(hisi_hba->breakpoint, 0, s);
1773
1774 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1775 memset(hisi_hba->sata_breakpoint, 0, s);
1776 }
1777 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
1778
1779 int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1780 {
1781 struct device *dev = hisi_hba->dev;
1782 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1783
1784 spin_lock_init(&hisi_hba->lock);
1785 for (i = 0; i < hisi_hba->n_phy; i++) {
1786 hisi_sas_phy_init(hisi_hba, i);
1787 hisi_hba->port[i].port_attached = 0;
1788 hisi_hba->port[i].id = -1;
1789 }
1790
1791 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1792 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1793 hisi_hba->devices[i].device_id = i;
1794 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1795 }
1796
1797 for (i = 0; i < hisi_hba->queue_count; i++) {
1798 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1799 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1800
1801 /* Completion queue structure */
1802 cq->id = i;
1803 cq->hisi_hba = hisi_hba;
1804
1805 /* Delivery queue structure */
1806 spin_lock_init(&dq->lock);
1807 dq->id = i;
1808 dq->hisi_hba = hisi_hba;
1809
1810 /* Delivery queue */
1811 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1812 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1813 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1814 if (!hisi_hba->cmd_hdr[i])
1815 goto err_out;
1816
1817 /* Completion queue */
1818 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1819 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1820 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1821 if (!hisi_hba->complete_hdr[i])
1822 goto err_out;
1823 }
1824
1825 s = sizeof(struct hisi_sas_slot_buf_table);
1826 hisi_hba->buffer_pool = dma_pool_create("dma_buffer", dev, s, 16, 0);
1827 if (!hisi_hba->buffer_pool)
1828 goto err_out;
1829
1830 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1831 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1832 GFP_KERNEL);
1833 if (!hisi_hba->itct)
1834 goto err_out;
1835
1836 memset(hisi_hba->itct, 0, s);
1837
1838 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1839 sizeof(struct hisi_sas_slot),
1840 GFP_KERNEL);
1841 if (!hisi_hba->slot_info)
1842 goto err_out;
1843
1844 s = max_command_entries * sizeof(struct hisi_sas_iost);
1845 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1846 GFP_KERNEL);
1847 if (!hisi_hba->iost)
1848 goto err_out;
1849
1850 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1851 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1852 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1853 if (!hisi_hba->breakpoint)
1854 goto err_out;
1855
1856 hisi_hba->slot_index_count = max_command_entries;
1857 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1858 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1859 if (!hisi_hba->slot_index_tags)
1860 goto err_out;
1861
1862 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1863 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1864 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1865 if (!hisi_hba->initial_fis)
1866 goto err_out;
1867
1868 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1869 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1870 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1871 if (!hisi_hba->sata_breakpoint)
1872 goto err_out;
1873 hisi_sas_init_mem(hisi_hba);
1874
1875 hisi_sas_slot_index_init(hisi_hba);
1876
1877 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1878 if (!hisi_hba->wq) {
1879 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1880 goto err_out;
1881 }
1882
1883 return 0;
1884 err_out:
1885 return -ENOMEM;
1886 }
1887 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
1888
1889 void hisi_sas_free(struct hisi_hba *hisi_hba)
1890 {
1891 struct device *dev = hisi_hba->dev;
1892 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1893
1894 for (i = 0; i < hisi_hba->queue_count; i++) {
1895 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1896 if (hisi_hba->cmd_hdr[i])
1897 dma_free_coherent(dev, s,
1898 hisi_hba->cmd_hdr[i],
1899 hisi_hba->cmd_hdr_dma[i]);
1900
1901 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1902 if (hisi_hba->complete_hdr[i])
1903 dma_free_coherent(dev, s,
1904 hisi_hba->complete_hdr[i],
1905 hisi_hba->complete_hdr_dma[i]);
1906 }
1907
1908 dma_pool_destroy(hisi_hba->buffer_pool);
1909
1910 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1911 if (hisi_hba->itct)
1912 dma_free_coherent(dev, s,
1913 hisi_hba->itct, hisi_hba->itct_dma);
1914
1915 s = max_command_entries * sizeof(struct hisi_sas_iost);
1916 if (hisi_hba->iost)
1917 dma_free_coherent(dev, s,
1918 hisi_hba->iost, hisi_hba->iost_dma);
1919
1920 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1921 if (hisi_hba->breakpoint)
1922 dma_free_coherent(dev, s,
1923 hisi_hba->breakpoint,
1924 hisi_hba->breakpoint_dma);
1925
1926
1927 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1928 if (hisi_hba->initial_fis)
1929 dma_free_coherent(dev, s,
1930 hisi_hba->initial_fis,
1931 hisi_hba->initial_fis_dma);
1932
1933 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1934 if (hisi_hba->sata_breakpoint)
1935 dma_free_coherent(dev, s,
1936 hisi_hba->sata_breakpoint,
1937 hisi_hba->sata_breakpoint_dma);
1938
1939 if (hisi_hba->wq)
1940 destroy_workqueue(hisi_hba->wq);
1941 }
1942 EXPORT_SYMBOL_GPL(hisi_sas_free);
1943
1944 void hisi_sas_rst_work_handler(struct work_struct *work)
1945 {
1946 struct hisi_hba *hisi_hba =
1947 container_of(work, struct hisi_hba, rst_work);
1948
1949 hisi_sas_controller_reset(hisi_hba);
1950 }
1951 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
1952
1953 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
1954 {
1955 struct hisi_sas_rst *rst =
1956 container_of(work, struct hisi_sas_rst, work);
1957
1958 if (!hisi_sas_controller_reset(rst->hisi_hba))
1959 rst->done = true;
1960 complete(rst->completion);
1961 }
1962 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
1963
1964 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
1965 {
1966 struct device *dev = hisi_hba->dev;
1967 struct platform_device *pdev = hisi_hba->platform_dev;
1968 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
1969 struct clk *refclk;
1970
1971 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1972 SAS_ADDR_SIZE)) {
1973 dev_err(dev, "could not get property sas-addr\n");
1974 return -ENOENT;
1975 }
1976
1977 if (np) {
1978 /*
1979 * These properties are only required for platform device-based
1980 * controller with DT firmware.
1981 */
1982 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1983 "hisilicon,sas-syscon");
1984 if (IS_ERR(hisi_hba->ctrl)) {
1985 dev_err(dev, "could not get syscon\n");
1986 return -ENOENT;
1987 }
1988
1989 if (device_property_read_u32(dev, "ctrl-reset-reg",
1990 &hisi_hba->ctrl_reset_reg)) {
1991 dev_err(dev,
1992 "could not get property ctrl-reset-reg\n");
1993 return -ENOENT;
1994 }
1995
1996 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1997 &hisi_hba->ctrl_reset_sts_reg)) {
1998 dev_err(dev,
1999 "could not get property ctrl-reset-sts-reg\n");
2000 return -ENOENT;
2001 }
2002
2003 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2004 &hisi_hba->ctrl_clock_ena_reg)) {
2005 dev_err(dev,
2006 "could not get property ctrl-clock-ena-reg\n");
2007 return -ENOENT;
2008 }
2009 }
2010
2011 refclk = devm_clk_get(dev, NULL);
2012 if (IS_ERR(refclk))
2013 dev_dbg(dev, "no ref clk property\n");
2014 else
2015 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2016
2017 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2018 dev_err(dev, "could not get property phy-count\n");
2019 return -ENOENT;
2020 }
2021
2022 if (device_property_read_u32(dev, "queue-count",
2023 &hisi_hba->queue_count)) {
2024 dev_err(dev, "could not get property queue-count\n");
2025 return -ENOENT;
2026 }
2027
2028 return 0;
2029 }
2030 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2031
2032 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2033 const struct hisi_sas_hw *hw)
2034 {
2035 struct resource *res;
2036 struct Scsi_Host *shost;
2037 struct hisi_hba *hisi_hba;
2038 struct device *dev = &pdev->dev;
2039
2040 shost = scsi_host_alloc(hisi_sas_sht, sizeof(*hisi_hba));
2041 if (!shost) {
2042 dev_err(dev, "scsi host alloc failed\n");
2043 return NULL;
2044 }
2045 hisi_hba = shost_priv(shost);
2046
2047 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2048 hisi_hba->hw = hw;
2049 hisi_hba->dev = dev;
2050 hisi_hba->platform_dev = pdev;
2051 hisi_hba->shost = shost;
2052 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2053
2054 timer_setup(&hisi_hba->timer, NULL, 0);
2055
2056 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2057 goto err_out;
2058
2059 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
2060 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
2061 dev_err(dev, "No usable DMA addressing method\n");
2062 goto err_out;
2063 }
2064
2065 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2066 hisi_hba->regs = devm_ioremap_resource(dev, res);
2067 if (IS_ERR(hisi_hba->regs))
2068 goto err_out;
2069
2070 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2071 if (res) {
2072 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2073 if (IS_ERR(hisi_hba->sgpio_regs))
2074 goto err_out;
2075 }
2076
2077 if (hisi_sas_alloc(hisi_hba, shost)) {
2078 hisi_sas_free(hisi_hba);
2079 goto err_out;
2080 }
2081
2082 return shost;
2083 err_out:
2084 scsi_host_put(shost);
2085 dev_err(dev, "shost alloc failed\n");
2086 return NULL;
2087 }
2088
2089 void hisi_sas_init_add(struct hisi_hba *hisi_hba)
2090 {
2091 int i;
2092
2093 for (i = 0; i < hisi_hba->n_phy; i++)
2094 memcpy(&hisi_hba->phy[i].dev_sas_addr,
2095 hisi_hba->sas_addr,
2096 SAS_ADDR_SIZE);
2097 }
2098 EXPORT_SYMBOL_GPL(hisi_sas_init_add);
2099
2100 int hisi_sas_probe(struct platform_device *pdev,
2101 const struct hisi_sas_hw *hw)
2102 {
2103 struct Scsi_Host *shost;
2104 struct hisi_hba *hisi_hba;
2105 struct device *dev = &pdev->dev;
2106 struct asd_sas_phy **arr_phy;
2107 struct asd_sas_port **arr_port;
2108 struct sas_ha_struct *sha;
2109 int rc, phy_nr, port_nr, i;
2110
2111 shost = hisi_sas_shost_alloc(pdev, hw);
2112 if (!shost)
2113 return -ENOMEM;
2114
2115 sha = SHOST_TO_SAS_HA(shost);
2116 hisi_hba = shost_priv(shost);
2117 platform_set_drvdata(pdev, sha);
2118
2119 phy_nr = port_nr = hisi_hba->n_phy;
2120
2121 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2122 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2123 if (!arr_phy || !arr_port) {
2124 rc = -ENOMEM;
2125 goto err_out_ha;
2126 }
2127
2128 sha->sas_phy = arr_phy;
2129 sha->sas_port = arr_port;
2130 sha->lldd_ha = hisi_hba;
2131
2132 shost->transportt = hisi_sas_stt;
2133 shost->max_id = HISI_SAS_MAX_DEVICES;
2134 shost->max_lun = ~0;
2135 shost->max_channel = 1;
2136 shost->max_cmd_len = 16;
2137 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
2138 shost->can_queue = hisi_hba->hw->max_command_entries;
2139 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
2140
2141 sha->sas_ha_name = DRV_NAME;
2142 sha->dev = hisi_hba->dev;
2143 sha->lldd_module = THIS_MODULE;
2144 sha->sas_addr = &hisi_hba->sas_addr[0];
2145 sha->num_phys = hisi_hba->n_phy;
2146 sha->core.shost = hisi_hba->shost;
2147
2148 for (i = 0; i < hisi_hba->n_phy; i++) {
2149 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2150 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2151 }
2152
2153 hisi_sas_init_add(hisi_hba);
2154
2155 rc = scsi_add_host(shost, &pdev->dev);
2156 if (rc)
2157 goto err_out_ha;
2158
2159 rc = sas_register_ha(sha);
2160 if (rc)
2161 goto err_out_register_ha;
2162
2163 rc = hisi_hba->hw->hw_init(hisi_hba);
2164 if (rc)
2165 goto err_out_register_ha;
2166
2167 scsi_scan_host(shost);
2168
2169 return 0;
2170
2171 err_out_register_ha:
2172 scsi_remove_host(shost);
2173 err_out_ha:
2174 hisi_sas_free(hisi_hba);
2175 scsi_host_put(shost);
2176 return rc;
2177 }
2178 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2179
2180 int hisi_sas_remove(struct platform_device *pdev)
2181 {
2182 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2183 struct hisi_hba *hisi_hba = sha->lldd_ha;
2184 struct Scsi_Host *shost = sha->core.shost;
2185
2186 sas_unregister_ha(sha);
2187 sas_remove_host(sha->core.shost);
2188
2189 hisi_sas_free(hisi_hba);
2190 scsi_host_put(shost);
2191 return 0;
2192 }
2193 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2194
2195 static __init int hisi_sas_init(void)
2196 {
2197 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2198 if (!hisi_sas_stt)
2199 return -ENOMEM;
2200
2201 return 0;
2202 }
2203
2204 static __exit void hisi_sas_exit(void)
2205 {
2206 sas_release_transport(hisi_sas_stt);
2207 }
2208
2209 module_init(hisi_sas_init);
2210 module_exit(hisi_sas_exit);
2211
2212 MODULE_LICENSE("GPL");
2213 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2214 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2215 MODULE_ALIAS("platform:" DRV_NAME);
CRIS linux kernel tree