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scsi: hisi_sas: fix return value of hisi_sas_task_prep()
[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(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
204 if (!task->lldd_task)
205 return;
206
207 task->lldd_task = NULL;
208
209 if (!sas_protocol_ata(task->task_proto))
210 if (slot->n_elem)
211 dma_unmap_sg(dev, task->scatter,
212 task->num_scatter,
213 task->data_dir);
214 }
215
216 if (slot->buf)
217 dma_pool_free(hisi_hba->buffer_pool, slot->buf, slot->buf_dma);
218
219 list_del_init(&slot->entry);
220 slot->buf = NULL;
221 slot->task = NULL;
222 slot->port = NULL;
223 hisi_sas_slot_index_free(hisi_hba, slot->idx);
224
225 /* slot memory is fully zeroed when it is reused */
226 }
227 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
228
229 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
230 struct hisi_sas_slot *slot)
231 {
232 return hisi_hba->hw->prep_smp(hisi_hba, slot);
233 }
234
235 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
236 struct hisi_sas_slot *slot, int is_tmf,
237 struct hisi_sas_tmf_task *tmf)
238 {
239 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
240 }
241
242 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
243 struct hisi_sas_slot *slot)
244 {
245 return hisi_hba->hw->prep_stp(hisi_hba, slot);
246 }
247
248 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
249 struct hisi_sas_slot *slot,
250 int device_id, int abort_flag, int tag_to_abort)
251 {
252 return hisi_hba->hw->prep_abort(hisi_hba, slot,
253 device_id, abort_flag, tag_to_abort);
254 }
255
256 /*
257 * This function will issue an abort TMF regardless of whether the
258 * task is in the sdev or not. Then it will do the task complete
259 * cleanup and callbacks.
260 */
261 static void hisi_sas_slot_abort(struct work_struct *work)
262 {
263 struct hisi_sas_slot *abort_slot =
264 container_of(work, struct hisi_sas_slot, abort_slot);
265 struct sas_task *task = abort_slot->task;
266 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
267 struct scsi_cmnd *cmnd = task->uldd_task;
268 struct hisi_sas_tmf_task tmf_task;
269 struct scsi_lun lun;
270 struct device *dev = hisi_hba->dev;
271 int tag = abort_slot->idx;
272 unsigned long flags;
273
274 if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
275 dev_err(dev, "cannot abort slot for non-ssp task\n");
276 goto out;
277 }
278
279 int_to_scsilun(cmnd->device->lun, &lun);
280 tmf_task.tmf = TMF_ABORT_TASK;
281 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
282
283 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
284 out:
285 /* Do cleanup for this task */
286 spin_lock_irqsave(&hisi_hba->lock, flags);
287 hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
288 spin_unlock_irqrestore(&hisi_hba->lock, flags);
289 if (task->task_done)
290 task->task_done(task);
291 }
292
293 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_sas_dq
294 *dq, int is_tmf, struct hisi_sas_tmf_task *tmf,
295 int *pass)
296 {
297 struct hisi_hba *hisi_hba = dq->hisi_hba;
298 struct domain_device *device = task->dev;
299 struct hisi_sas_device *sas_dev = device->lldd_dev;
300 struct hisi_sas_port *port;
301 struct hisi_sas_slot *slot;
302 struct hisi_sas_cmd_hdr *cmd_hdr_base;
303 struct asd_sas_port *sas_port = device->port;
304 struct device *dev = hisi_hba->dev;
305 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
306 unsigned long flags;
307
308 if (!sas_port) {
309 struct task_status_struct *ts = &task->task_status;
310
311 ts->resp = SAS_TASK_UNDELIVERED;
312 ts->stat = SAS_PHY_DOWN;
313 /*
314 * libsas will use dev->port, should
315 * not call task_done for sata
316 */
317 if (device->dev_type != SAS_SATA_DEV)
318 task->task_done(task);
319 return -ECOMM;
320 }
321
322 if (DEV_IS_GONE(sas_dev)) {
323 if (sas_dev)
324 dev_info(dev, "task prep: device %d not ready\n",
325 sas_dev->device_id);
326 else
327 dev_info(dev, "task prep: device %016llx not ready\n",
328 SAS_ADDR(device->sas_addr));
329
330 return -ECOMM;
331 }
332
333 port = to_hisi_sas_port(sas_port);
334 if (port && !port->port_attached) {
335 dev_info(dev, "task prep: %s port%d not attach device\n",
336 (dev_is_sata(device)) ?
337 "SATA/STP" : "SAS",
338 device->port->id);
339
340 return -ECOMM;
341 }
342
343 if (!sas_protocol_ata(task->task_proto)) {
344 if (task->num_scatter) {
345 n_elem = dma_map_sg(dev, task->scatter,
346 task->num_scatter, task->data_dir);
347 if (!n_elem) {
348 rc = -ENOMEM;
349 goto prep_out;
350 }
351 }
352 } else
353 n_elem = task->num_scatter;
354
355 spin_lock_irqsave(&hisi_hba->lock, flags);
356 if (hisi_hba->hw->slot_index_alloc)
357 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
358 device);
359 else
360 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
361 if (rc) {
362 spin_unlock_irqrestore(&hisi_hba->lock, flags);
363 goto err_out;
364 }
365 spin_unlock_irqrestore(&hisi_hba->lock, flags);
366
367 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
368 if (rc)
369 goto err_out_tag;
370
371 dlvry_queue = dq->id;
372 dlvry_queue_slot = dq->wr_point;
373 slot = &hisi_hba->slot_info[slot_idx];
374 memset(slot, 0, sizeof(struct hisi_sas_slot));
375
376 slot->idx = slot_idx;
377 slot->n_elem = n_elem;
378 slot->dlvry_queue = dlvry_queue;
379 slot->dlvry_queue_slot = dlvry_queue_slot;
380 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
381 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
382 slot->task = task;
383 slot->port = port;
384 task->lldd_task = slot;
385 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
386
387 slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
388 GFP_ATOMIC, &slot->buf_dma);
389 if (!slot->buf) {
390 rc = -ENOMEM;
391 goto err_out_slot_buf;
392 }
393 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
394 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
395 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
396
397 switch (task->task_proto) {
398 case SAS_PROTOCOL_SMP:
399 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
400 break;
401 case SAS_PROTOCOL_SSP:
402 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
403 break;
404 case SAS_PROTOCOL_SATA:
405 case SAS_PROTOCOL_STP:
406 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
407 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
408 break;
409 default:
410 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
411 task->task_proto);
412 rc = -EINVAL;
413 break;
414 }
415
416 if (rc) {
417 dev_err(dev, "task prep: rc = 0x%x\n", rc);
418 goto err_out_buf;
419 }
420
421 spin_lock_irqsave(&hisi_hba->lock, flags);
422 list_add_tail(&slot->entry, &sas_dev->list);
423 spin_unlock_irqrestore(&hisi_hba->lock, flags);
424 spin_lock_irqsave(&task->task_state_lock, flags);
425 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
426 spin_unlock_irqrestore(&task->task_state_lock, flags);
427
428 dq->slot_prep = slot;
429 ++(*pass);
430
431 return 0;
432
433 err_out_buf:
434 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
435 slot->buf_dma);
436 err_out_slot_buf:
437 /* Nothing to be done */
438 err_out_tag:
439 spin_lock_irqsave(&hisi_hba->lock, flags);
440 hisi_sas_slot_index_free(hisi_hba, slot_idx);
441 spin_unlock_irqrestore(&hisi_hba->lock, flags);
442 err_out:
443 dev_err(dev, "task prep: failed[%d]!\n", rc);
444 if (!sas_protocol_ata(task->task_proto))
445 if (n_elem)
446 dma_unmap_sg(dev, task->scatter,
447 task->num_scatter,
448 task->data_dir);
449 prep_out:
450 return rc;
451 }
452
453 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
454 int is_tmf, struct hisi_sas_tmf_task *tmf)
455 {
456 u32 rc;
457 u32 pass = 0;
458 unsigned long flags;
459 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
460 struct device *dev = hisi_hba->dev;
461 struct domain_device *device = task->dev;
462 struct hisi_sas_device *sas_dev = device->lldd_dev;
463 struct hisi_sas_dq *dq = sas_dev->dq;
464
465 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
466 return -EINVAL;
467
468 /* protect task_prep and start_delivery sequence */
469 spin_lock_irqsave(&dq->lock, flags);
470 rc = hisi_sas_task_prep(task, dq, is_tmf, tmf, &pass);
471 if (rc)
472 dev_err(dev, "task exec: failed[%d]!\n", rc);
473
474 if (likely(pass))
475 hisi_hba->hw->start_delivery(dq);
476 spin_unlock_irqrestore(&dq->lock, flags);
477
478 return rc;
479 }
480
481 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
482 {
483 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
484 struct asd_sas_phy *sas_phy = &phy->sas_phy;
485 struct sas_ha_struct *sas_ha;
486
487 if (!phy->phy_attached)
488 return;
489
490 sas_ha = &hisi_hba->sha;
491 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
492
493 if (sas_phy->phy) {
494 struct sas_phy *sphy = sas_phy->phy;
495
496 sphy->negotiated_linkrate = sas_phy->linkrate;
497 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
498 sphy->maximum_linkrate_hw =
499 hisi_hba->hw->phy_get_max_linkrate();
500 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
501 sphy->minimum_linkrate = phy->minimum_linkrate;
502
503 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
504 sphy->maximum_linkrate = phy->maximum_linkrate;
505 }
506
507 if (phy->phy_type & PORT_TYPE_SAS) {
508 struct sas_identify_frame *id;
509
510 id = (struct sas_identify_frame *)phy->frame_rcvd;
511 id->dev_type = phy->identify.device_type;
512 id->initiator_bits = SAS_PROTOCOL_ALL;
513 id->target_bits = phy->identify.target_port_protocols;
514 } else if (phy->phy_type & PORT_TYPE_SATA) {
515 /*Nothing*/
516 }
517
518 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
519 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
520 }
521
522 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
523 {
524 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
525 struct hisi_sas_device *sas_dev = NULL;
526 unsigned long flags;
527 int i;
528
529 spin_lock_irqsave(&hisi_hba->lock, flags);
530 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
531 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
532 int queue = i % hisi_hba->queue_count;
533 struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
534
535 hisi_hba->devices[i].device_id = i;
536 sas_dev = &hisi_hba->devices[i];
537 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
538 sas_dev->dev_type = device->dev_type;
539 sas_dev->hisi_hba = hisi_hba;
540 sas_dev->sas_device = device;
541 sas_dev->dq = dq;
542 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
543 break;
544 }
545 }
546 spin_unlock_irqrestore(&hisi_hba->lock, flags);
547
548 return sas_dev;
549 }
550
551 static int hisi_sas_dev_found(struct domain_device *device)
552 {
553 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
554 struct domain_device *parent_dev = device->parent;
555 struct hisi_sas_device *sas_dev;
556 struct device *dev = hisi_hba->dev;
557
558 if (hisi_hba->hw->alloc_dev)
559 sas_dev = hisi_hba->hw->alloc_dev(device);
560 else
561 sas_dev = hisi_sas_alloc_dev(device);
562 if (!sas_dev) {
563 dev_err(dev, "fail alloc dev: max support %d devices\n",
564 HISI_SAS_MAX_DEVICES);
565 return -EINVAL;
566 }
567
568 device->lldd_dev = sas_dev;
569 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
570
571 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
572 int phy_no;
573 u8 phy_num = parent_dev->ex_dev.num_phys;
574 struct ex_phy *phy;
575
576 for (phy_no = 0; phy_no < phy_num; phy_no++) {
577 phy = &parent_dev->ex_dev.ex_phy[phy_no];
578 if (SAS_ADDR(phy->attached_sas_addr) ==
579 SAS_ADDR(device->sas_addr)) {
580 sas_dev->attached_phy = phy_no;
581 break;
582 }
583 }
584
585 if (phy_no == phy_num) {
586 dev_info(dev, "dev found: no attached "
587 "dev:%016llx at ex:%016llx\n",
588 SAS_ADDR(device->sas_addr),
589 SAS_ADDR(parent_dev->sas_addr));
590 return -EINVAL;
591 }
592 }
593
594 dev_info(dev, "dev[%d:%x] found\n",
595 sas_dev->device_id, sas_dev->dev_type);
596
597 return 0;
598 }
599
600 static int hisi_sas_slave_configure(struct scsi_device *sdev)
601 {
602 struct domain_device *dev = sdev_to_domain_dev(sdev);
603 int ret = sas_slave_configure(sdev);
604
605 if (ret)
606 return ret;
607 if (!dev_is_sata(dev))
608 sas_change_queue_depth(sdev, 64);
609
610 return 0;
611 }
612
613 static void hisi_sas_scan_start(struct Scsi_Host *shost)
614 {
615 struct hisi_hba *hisi_hba = shost_priv(shost);
616
617 hisi_hba->hw->phys_init(hisi_hba);
618 }
619
620 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
621 {
622 struct hisi_hba *hisi_hba = shost_priv(shost);
623 struct sas_ha_struct *sha = &hisi_hba->sha;
624
625 /* Wait for PHY up interrupt to occur */
626 if (time < HZ)
627 return 0;
628
629 sas_drain_work(sha);
630 return 1;
631 }
632
633 static void hisi_sas_phyup_work(struct work_struct *work)
634 {
635 struct hisi_sas_phy *phy =
636 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
637 struct hisi_hba *hisi_hba = phy->hisi_hba;
638 struct asd_sas_phy *sas_phy = &phy->sas_phy;
639 int phy_no = sas_phy->id;
640
641 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
642 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
643 }
644
645 static void hisi_sas_linkreset_work(struct work_struct *work)
646 {
647 struct hisi_sas_phy *phy =
648 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
649 struct asd_sas_phy *sas_phy = &phy->sas_phy;
650
651 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
652 }
653
654 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
655 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
656 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
657 };
658
659 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
660 enum hisi_sas_phy_event event)
661 {
662 struct hisi_hba *hisi_hba = phy->hisi_hba;
663
664 if (WARN_ON(event >= HISI_PHYES_NUM))
665 return false;
666
667 return queue_work(hisi_hba->wq, &phy->works[event]);
668 }
669 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
670
671 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
672 {
673 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
674 struct asd_sas_phy *sas_phy = &phy->sas_phy;
675 int i;
676
677 phy->hisi_hba = hisi_hba;
678 phy->port = NULL;
679 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
680 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
681 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
682 sas_phy->class = SAS;
683 sas_phy->iproto = SAS_PROTOCOL_ALL;
684 sas_phy->tproto = 0;
685 sas_phy->type = PHY_TYPE_PHYSICAL;
686 sas_phy->role = PHY_ROLE_INITIATOR;
687 sas_phy->oob_mode = OOB_NOT_CONNECTED;
688 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
689 sas_phy->id = phy_no;
690 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
691 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
692 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
693 sas_phy->lldd_phy = phy;
694
695 for (i = 0; i < HISI_PHYES_NUM; i++)
696 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
697 }
698
699 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
700 {
701 struct sas_ha_struct *sas_ha = sas_phy->ha;
702 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
703 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
704 struct asd_sas_port *sas_port = sas_phy->port;
705 struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
706 unsigned long flags;
707
708 if (!sas_port)
709 return;
710
711 spin_lock_irqsave(&hisi_hba->lock, flags);
712 port->port_attached = 1;
713 port->id = phy->port_id;
714 phy->port = port;
715 sas_port->lldd_port = port;
716 spin_unlock_irqrestore(&hisi_hba->lock, flags);
717 }
718
719 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
720 struct hisi_sas_slot *slot)
721 {
722 if (task) {
723 unsigned long flags;
724 struct task_status_struct *ts;
725
726 ts = &task->task_status;
727
728 ts->resp = SAS_TASK_COMPLETE;
729 ts->stat = SAS_ABORTED_TASK;
730 spin_lock_irqsave(&task->task_state_lock, flags);
731 task->task_state_flags &=
732 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
733 task->task_state_flags |= SAS_TASK_STATE_DONE;
734 spin_unlock_irqrestore(&task->task_state_lock, flags);
735 }
736
737 hisi_sas_slot_task_free(hisi_hba, task, slot);
738 }
739
740 /* hisi_hba.lock should be locked */
741 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
742 struct domain_device *device)
743 {
744 struct hisi_sas_slot *slot, *slot2;
745 struct hisi_sas_device *sas_dev = device->lldd_dev;
746
747 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
748 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
749 }
750
751 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
752 {
753 struct hisi_sas_device *sas_dev;
754 struct domain_device *device;
755 int i;
756
757 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
758 sas_dev = &hisi_hba->devices[i];
759 device = sas_dev->sas_device;
760
761 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
762 !device)
763 continue;
764
765 hisi_sas_release_task(hisi_hba, device);
766 }
767 }
768 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
769
770 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
771 struct domain_device *device)
772 {
773 if (hisi_hba->hw->dereg_device)
774 hisi_hba->hw->dereg_device(hisi_hba, device);
775 }
776
777 static void hisi_sas_dev_gone(struct domain_device *device)
778 {
779 struct hisi_sas_device *sas_dev = device->lldd_dev;
780 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
781 struct device *dev = hisi_hba->dev;
782
783 dev_info(dev, "dev[%d:%x] is gone\n",
784 sas_dev->device_id, sas_dev->dev_type);
785
786 if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
787 hisi_sas_internal_task_abort(hisi_hba, device,
788 HISI_SAS_INT_ABT_DEV, 0);
789
790 hisi_sas_dereg_device(hisi_hba, device);
791
792 hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
793 device->lldd_dev = NULL;
794 }
795
796 if (hisi_hba->hw->free_device)
797 hisi_hba->hw->free_device(sas_dev);
798 sas_dev->dev_type = SAS_PHY_UNUSED;
799 }
800
801 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
802 {
803 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
804 }
805
806 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
807 void *funcdata)
808 {
809 struct sas_ha_struct *sas_ha = sas_phy->ha;
810 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
811 int phy_no = sas_phy->id;
812
813 switch (func) {
814 case PHY_FUNC_HARD_RESET:
815 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
816 break;
817
818 case PHY_FUNC_LINK_RESET:
819 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
820 msleep(100);
821 hisi_hba->hw->phy_start(hisi_hba, phy_no);
822 break;
823
824 case PHY_FUNC_DISABLE:
825 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
826 break;
827
828 case PHY_FUNC_SET_LINK_RATE:
829 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
830 break;
831 case PHY_FUNC_GET_EVENTS:
832 if (hisi_hba->hw->get_events) {
833 hisi_hba->hw->get_events(hisi_hba, phy_no);
834 break;
835 }
836 /* fallthru */
837 case PHY_FUNC_RELEASE_SPINUP_HOLD:
838 default:
839 return -EOPNOTSUPP;
840 }
841 return 0;
842 }
843
844 static void hisi_sas_task_done(struct sas_task *task)
845 {
846 if (!del_timer(&task->slow_task->timer))
847 return;
848 complete(&task->slow_task->completion);
849 }
850
851 static void hisi_sas_tmf_timedout(struct timer_list *t)
852 {
853 struct sas_task_slow *slow = from_timer(slow, t, timer);
854 struct sas_task *task = slow->task;
855 unsigned long flags;
856
857 spin_lock_irqsave(&task->task_state_lock, flags);
858 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
859 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
860 spin_unlock_irqrestore(&task->task_state_lock, flags);
861
862 complete(&task->slow_task->completion);
863 }
864
865 #define TASK_TIMEOUT 20
866 #define TASK_RETRY 3
867 #define INTERNAL_ABORT_TIMEOUT 6
868 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
869 void *parameter, u32 para_len,
870 struct hisi_sas_tmf_task *tmf)
871 {
872 struct hisi_sas_device *sas_dev = device->lldd_dev;
873 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
874 struct device *dev = hisi_hba->dev;
875 struct sas_task *task;
876 int res, retry;
877
878 for (retry = 0; retry < TASK_RETRY; retry++) {
879 task = sas_alloc_slow_task(GFP_KERNEL);
880 if (!task)
881 return -ENOMEM;
882
883 task->dev = device;
884 task->task_proto = device->tproto;
885
886 if (dev_is_sata(device)) {
887 task->ata_task.device_control_reg_update = 1;
888 memcpy(&task->ata_task.fis, parameter, para_len);
889 } else {
890 memcpy(&task->ssp_task, parameter, para_len);
891 }
892 task->task_done = hisi_sas_task_done;
893
894 task->slow_task->timer.function = hisi_sas_tmf_timedout;
895 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
896 add_timer(&task->slow_task->timer);
897
898 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
899
900 if (res) {
901 del_timer(&task->slow_task->timer);
902 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
903 res);
904 goto ex_err;
905 }
906
907 wait_for_completion(&task->slow_task->completion);
908 res = TMF_RESP_FUNC_FAILED;
909 /* Even TMF timed out, return direct. */
910 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
911 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
912 struct hisi_sas_slot *slot = task->lldd_task;
913
914 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
915 if (slot)
916 slot->task = NULL;
917
918 goto ex_err;
919 } else
920 dev_err(dev, "abort tmf: TMF task timeout\n");
921 }
922
923 if (task->task_status.resp == SAS_TASK_COMPLETE &&
924 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
925 res = TMF_RESP_FUNC_COMPLETE;
926 break;
927 }
928
929 if (task->task_status.resp == SAS_TASK_COMPLETE &&
930 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
931 res = TMF_RESP_FUNC_SUCC;
932 break;
933 }
934
935 if (task->task_status.resp == SAS_TASK_COMPLETE &&
936 task->task_status.stat == SAS_DATA_UNDERRUN) {
937 /* no error, but return the number of bytes of
938 * underrun
939 */
940 dev_warn(dev, "abort tmf: task to dev %016llx "
941 "resp: 0x%x sts 0x%x underrun\n",
942 SAS_ADDR(device->sas_addr),
943 task->task_status.resp,
944 task->task_status.stat);
945 res = task->task_status.residual;
946 break;
947 }
948
949 if (task->task_status.resp == SAS_TASK_COMPLETE &&
950 task->task_status.stat == SAS_DATA_OVERRUN) {
951 dev_warn(dev, "abort tmf: blocked task error\n");
952 res = -EMSGSIZE;
953 break;
954 }
955
956 dev_warn(dev, "abort tmf: task to dev "
957 "%016llx resp: 0x%x status 0x%x\n",
958 SAS_ADDR(device->sas_addr), task->task_status.resp,
959 task->task_status.stat);
960 sas_free_task(task);
961 task = NULL;
962 }
963 ex_err:
964 if (retry == TASK_RETRY)
965 dev_warn(dev, "abort tmf: executing internal task failed!\n");
966 sas_free_task(task);
967 return res;
968 }
969
970 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
971 bool reset, int pmp, u8 *fis)
972 {
973 struct ata_taskfile tf;
974
975 ata_tf_init(dev, &tf);
976 if (reset)
977 tf.ctl |= ATA_SRST;
978 else
979 tf.ctl &= ~ATA_SRST;
980 tf.command = ATA_CMD_DEV_RESET;
981 ata_tf_to_fis(&tf, pmp, 0, fis);
982 }
983
984 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
985 {
986 u8 fis[20] = {0};
987 struct ata_port *ap = device->sata_dev.ap;
988 struct ata_link *link;
989 int rc = TMF_RESP_FUNC_FAILED;
990 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
991 struct device *dev = hisi_hba->dev;
992 int s = sizeof(struct host_to_dev_fis);
993 unsigned long flags;
994
995 ata_for_each_link(link, ap, EDGE) {
996 int pmp = sata_srst_pmp(link);
997
998 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
999 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1000 if (rc != TMF_RESP_FUNC_COMPLETE)
1001 break;
1002 }
1003
1004 if (rc == TMF_RESP_FUNC_COMPLETE) {
1005 ata_for_each_link(link, ap, EDGE) {
1006 int pmp = sata_srst_pmp(link);
1007
1008 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1009 rc = hisi_sas_exec_internal_tmf_task(device, fis,
1010 s, NULL);
1011 if (rc != TMF_RESP_FUNC_COMPLETE)
1012 dev_err(dev, "ata disk de-reset failed\n");
1013 }
1014 } else {
1015 dev_err(dev, "ata disk reset failed\n");
1016 }
1017
1018 if (rc == TMF_RESP_FUNC_COMPLETE) {
1019 spin_lock_irqsave(&hisi_hba->lock, flags);
1020 hisi_sas_release_task(hisi_hba, device);
1021 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1022 }
1023
1024 return rc;
1025 }
1026
1027 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1028 u8 *lun, struct hisi_sas_tmf_task *tmf)
1029 {
1030 struct sas_ssp_task ssp_task;
1031
1032 if (!(device->tproto & SAS_PROTOCOL_SSP))
1033 return TMF_RESP_FUNC_ESUPP;
1034
1035 memcpy(ssp_task.LUN, lun, 8);
1036
1037 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1038 sizeof(ssp_task), tmf);
1039 }
1040
1041 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1042 {
1043 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1044 int i;
1045
1046 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1047 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1048 struct domain_device *device = sas_dev->sas_device;
1049 struct asd_sas_port *sas_port;
1050 struct hisi_sas_port *port;
1051 struct hisi_sas_phy *phy = NULL;
1052 struct asd_sas_phy *sas_phy;
1053
1054 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1055 || !device || !device->port)
1056 continue;
1057
1058 sas_port = device->port;
1059 port = to_hisi_sas_port(sas_port);
1060
1061 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1062 if (state & BIT(sas_phy->id)) {
1063 phy = sas_phy->lldd_phy;
1064 break;
1065 }
1066
1067 if (phy) {
1068 port->id = phy->port_id;
1069
1070 /* Update linkrate of directly attached device. */
1071 if (!device->parent)
1072 device->linkrate = phy->sas_phy.linkrate;
1073
1074 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1075 } else
1076 port->id = 0xff;
1077 }
1078 }
1079
1080 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1081 u32 state)
1082 {
1083 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1084 struct asd_sas_port *_sas_port = NULL;
1085 int phy_no;
1086
1087 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1088 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1089 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1090 struct asd_sas_port *sas_port = sas_phy->port;
1091 bool do_port_check = !!(_sas_port != sas_port);
1092
1093 if (!sas_phy->phy->enabled)
1094 continue;
1095
1096 /* Report PHY state change to libsas */
1097 if (state & BIT(phy_no)) {
1098 if (do_port_check && sas_port && sas_port->port_dev) {
1099 struct domain_device *dev = sas_port->port_dev;
1100
1101 _sas_port = sas_port;
1102
1103 if (DEV_IS_EXPANDER(dev->dev_type))
1104 sas_ha->notify_port_event(sas_phy,
1105 PORTE_BROADCAST_RCVD);
1106 }
1107 } else if (old_state & (1 << phy_no))
1108 /* PHY down but was up before */
1109 hisi_sas_phy_down(hisi_hba, phy_no, 0);
1110
1111 }
1112 }
1113
1114 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1115 {
1116 struct device *dev = hisi_hba->dev;
1117 struct Scsi_Host *shost = hisi_hba->shost;
1118 u32 old_state, state;
1119 unsigned long flags;
1120 int rc;
1121
1122 if (!hisi_hba->hw->soft_reset)
1123 return -1;
1124
1125 if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1126 return -1;
1127
1128 dev_info(dev, "controller resetting...\n");
1129 old_state = hisi_hba->hw->get_phys_state(hisi_hba);
1130
1131 scsi_block_requests(shost);
1132 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1133 rc = hisi_hba->hw->soft_reset(hisi_hba);
1134 if (rc) {
1135 dev_warn(dev, "controller reset failed (%d)\n", rc);
1136 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1137 scsi_unblock_requests(shost);
1138 goto out;
1139 }
1140 spin_lock_irqsave(&hisi_hba->lock, flags);
1141 hisi_sas_release_tasks(hisi_hba);
1142 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1143
1144 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1145
1146 /* Init and wait for PHYs to come up and all libsas event finished. */
1147 hisi_hba->hw->phys_init(hisi_hba);
1148 msleep(1000);
1149 hisi_sas_refresh_port_id(hisi_hba);
1150 scsi_unblock_requests(shost);
1151
1152 state = hisi_hba->hw->get_phys_state(hisi_hba);
1153 hisi_sas_rescan_topology(hisi_hba, old_state, state);
1154 dev_info(dev, "controller reset complete\n");
1155
1156 out:
1157 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1158
1159 return rc;
1160 }
1161
1162 static int hisi_sas_abort_task(struct sas_task *task)
1163 {
1164 struct scsi_lun lun;
1165 struct hisi_sas_tmf_task tmf_task;
1166 struct domain_device *device = task->dev;
1167 struct hisi_sas_device *sas_dev = device->lldd_dev;
1168 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
1169 struct device *dev = hisi_hba->dev;
1170 int rc = TMF_RESP_FUNC_FAILED;
1171 unsigned long flags;
1172
1173 if (!sas_dev) {
1174 dev_warn(dev, "Device has been removed\n");
1175 return TMF_RESP_FUNC_FAILED;
1176 }
1177
1178 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1179 rc = TMF_RESP_FUNC_COMPLETE;
1180 goto out;
1181 }
1182
1183 sas_dev->dev_status = HISI_SAS_DEV_EH;
1184 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1185 struct scsi_cmnd *cmnd = task->uldd_task;
1186 struct hisi_sas_slot *slot = task->lldd_task;
1187 u32 tag = slot->idx;
1188 int rc2;
1189
1190 int_to_scsilun(cmnd->device->lun, &lun);
1191 tmf_task.tmf = TMF_ABORT_TASK;
1192 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1193
1194 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1195 &tmf_task);
1196
1197 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1198 HISI_SAS_INT_ABT_CMD, tag);
1199 if (rc2 < 0) {
1200 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1201 return TMF_RESP_FUNC_FAILED;
1202 }
1203
1204 /*
1205 * If the TMF finds that the IO is not in the device and also
1206 * the internal abort does not succeed, then it is safe to
1207 * free the slot.
1208 * Note: if the internal abort succeeds then the slot
1209 * will have already been completed
1210 */
1211 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1212 if (task->lldd_task) {
1213 spin_lock_irqsave(&hisi_hba->lock, flags);
1214 hisi_sas_do_release_task(hisi_hba, task, slot);
1215 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1216 }
1217 }
1218 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1219 task->task_proto & SAS_PROTOCOL_STP) {
1220 if (task->dev->dev_type == SAS_SATA_DEV) {
1221 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1222 HISI_SAS_INT_ABT_DEV, 0);
1223 if (rc < 0) {
1224 dev_err(dev, "abort task: internal abort failed\n");
1225 goto out;
1226 }
1227 hisi_sas_dereg_device(hisi_hba, device);
1228 rc = hisi_sas_softreset_ata_disk(device);
1229 }
1230 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1231 /* SMP */
1232 struct hisi_sas_slot *slot = task->lldd_task;
1233 u32 tag = slot->idx;
1234
1235 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1236 HISI_SAS_INT_ABT_CMD, tag);
1237 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1238 task->lldd_task) {
1239 spin_lock_irqsave(&hisi_hba->lock, flags);
1240 hisi_sas_do_release_task(hisi_hba, task, slot);
1241 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1242 }
1243 }
1244
1245 out:
1246 if (rc != TMF_RESP_FUNC_COMPLETE)
1247 dev_notice(dev, "abort task: rc=%d\n", rc);
1248 return rc;
1249 }
1250
1251 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1252 {
1253 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1254 struct device *dev = hisi_hba->dev;
1255 struct hisi_sas_tmf_task tmf_task;
1256 int rc = TMF_RESP_FUNC_FAILED;
1257 unsigned long flags;
1258
1259 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1260 HISI_SAS_INT_ABT_DEV, 0);
1261 if (rc < 0) {
1262 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1263 return TMF_RESP_FUNC_FAILED;
1264 }
1265 hisi_sas_dereg_device(hisi_hba, device);
1266
1267 tmf_task.tmf = TMF_ABORT_TASK_SET;
1268 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1269
1270 if (rc == TMF_RESP_FUNC_COMPLETE) {
1271 spin_lock_irqsave(&hisi_hba->lock, flags);
1272 hisi_sas_release_task(hisi_hba, device);
1273 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1274 }
1275
1276 return rc;
1277 }
1278
1279 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1280 {
1281 int rc = TMF_RESP_FUNC_FAILED;
1282 struct hisi_sas_tmf_task tmf_task;
1283
1284 tmf_task.tmf = TMF_CLEAR_ACA;
1285 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1286
1287 return rc;
1288 }
1289
1290 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1291 {
1292 struct sas_phy *phy = sas_get_local_phy(device);
1293 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1294 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1295 rc = sas_phy_reset(phy, reset_type);
1296 sas_put_local_phy(phy);
1297 msleep(2000);
1298 return rc;
1299 }
1300
1301 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1302 {
1303 struct hisi_sas_device *sas_dev = device->lldd_dev;
1304 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1305 struct device *dev = hisi_hba->dev;
1306 int rc = TMF_RESP_FUNC_FAILED;
1307 unsigned long flags;
1308
1309 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
1310 return TMF_RESP_FUNC_FAILED;
1311 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1312
1313 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1314 HISI_SAS_INT_ABT_DEV, 0);
1315 if (rc < 0) {
1316 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1317 return TMF_RESP_FUNC_FAILED;
1318 }
1319 hisi_sas_dereg_device(hisi_hba, device);
1320
1321 rc = hisi_sas_debug_I_T_nexus_reset(device);
1322
1323 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV)) {
1324 spin_lock_irqsave(&hisi_hba->lock, flags);
1325 hisi_sas_release_task(hisi_hba, device);
1326 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1327 }
1328 return rc;
1329 }
1330
1331 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1332 {
1333 struct hisi_sas_device *sas_dev = device->lldd_dev;
1334 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1335 struct device *dev = hisi_hba->dev;
1336 unsigned long flags;
1337 int rc = TMF_RESP_FUNC_FAILED;
1338
1339 sas_dev->dev_status = HISI_SAS_DEV_EH;
1340 if (dev_is_sata(device)) {
1341 struct sas_phy *phy;
1342
1343 /* Clear internal IO and then hardreset */
1344 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1345 HISI_SAS_INT_ABT_DEV, 0);
1346 if (rc < 0) {
1347 dev_err(dev, "lu_reset: internal abort failed\n");
1348 goto out;
1349 }
1350 hisi_sas_dereg_device(hisi_hba, device);
1351
1352 phy = sas_get_local_phy(device);
1353
1354 rc = sas_phy_reset(phy, 1);
1355
1356 if (rc == 0) {
1357 spin_lock_irqsave(&hisi_hba->lock, flags);
1358 hisi_sas_release_task(hisi_hba, device);
1359 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1360 }
1361 sas_put_local_phy(phy);
1362 } else {
1363 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1364
1365 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1366 HISI_SAS_INT_ABT_DEV, 0);
1367 if (rc < 0) {
1368 dev_err(dev, "lu_reset: internal abort failed\n");
1369 goto out;
1370 }
1371 hisi_sas_dereg_device(hisi_hba, device);
1372
1373 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1374 if (rc == TMF_RESP_FUNC_COMPLETE) {
1375 spin_lock_irqsave(&hisi_hba->lock, flags);
1376 hisi_sas_release_task(hisi_hba, device);
1377 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1378 }
1379 }
1380 out:
1381 if (rc != TMF_RESP_FUNC_COMPLETE)
1382 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1383 sas_dev->device_id, rc);
1384 return rc;
1385 }
1386
1387 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1388 {
1389 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1390 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1391
1392 queue_work(hisi_hba->wq, &r.work);
1393 wait_for_completion(r.completion);
1394 if (r.done)
1395 return TMF_RESP_FUNC_COMPLETE;
1396
1397 return TMF_RESP_FUNC_FAILED;
1398 }
1399
1400 static int hisi_sas_query_task(struct sas_task *task)
1401 {
1402 struct scsi_lun lun;
1403 struct hisi_sas_tmf_task tmf_task;
1404 int rc = TMF_RESP_FUNC_FAILED;
1405
1406 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1407 struct scsi_cmnd *cmnd = task->uldd_task;
1408 struct domain_device *device = task->dev;
1409 struct hisi_sas_slot *slot = task->lldd_task;
1410 u32 tag = slot->idx;
1411
1412 int_to_scsilun(cmnd->device->lun, &lun);
1413 tmf_task.tmf = TMF_QUERY_TASK;
1414 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1415
1416 rc = hisi_sas_debug_issue_ssp_tmf(device,
1417 lun.scsi_lun,
1418 &tmf_task);
1419 switch (rc) {
1420 /* The task is still in Lun, release it then */
1421 case TMF_RESP_FUNC_SUCC:
1422 /* The task is not in Lun or failed, reset the phy */
1423 case TMF_RESP_FUNC_FAILED:
1424 case TMF_RESP_FUNC_COMPLETE:
1425 break;
1426 default:
1427 rc = TMF_RESP_FUNC_FAILED;
1428 break;
1429 }
1430 }
1431 return rc;
1432 }
1433
1434 static int
1435 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1436 struct sas_task *task, int abort_flag,
1437 int task_tag)
1438 {
1439 struct domain_device *device = task->dev;
1440 struct hisi_sas_device *sas_dev = device->lldd_dev;
1441 struct device *dev = hisi_hba->dev;
1442 struct hisi_sas_port *port;
1443 struct hisi_sas_slot *slot;
1444 struct asd_sas_port *sas_port = device->port;
1445 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1446 struct hisi_sas_dq *dq = sas_dev->dq;
1447 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1448 unsigned long flags, flags_dq;
1449
1450 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1451 return -EINVAL;
1452
1453 if (!device->port)
1454 return -1;
1455
1456 port = to_hisi_sas_port(sas_port);
1457
1458 /* simply get a slot and send abort command */
1459 spin_lock_irqsave(&hisi_hba->lock, flags);
1460 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1461 if (rc) {
1462 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1463 goto err_out;
1464 }
1465 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1466
1467 spin_lock_irqsave(&dq->lock, flags_dq);
1468 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1469 if (rc)
1470 goto err_out_tag;
1471
1472 dlvry_queue = dq->id;
1473 dlvry_queue_slot = dq->wr_point;
1474
1475 slot = &hisi_hba->slot_info[slot_idx];
1476 memset(slot, 0, sizeof(struct hisi_sas_slot));
1477
1478 slot->idx = slot_idx;
1479 slot->n_elem = n_elem;
1480 slot->dlvry_queue = dlvry_queue;
1481 slot->dlvry_queue_slot = dlvry_queue_slot;
1482 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1483 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1484 slot->task = task;
1485 slot->port = port;
1486 task->lldd_task = slot;
1487
1488 slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
1489 GFP_ATOMIC, &slot->buf_dma);
1490 if (!slot->buf) {
1491 rc = -ENOMEM;
1492 goto err_out_tag;
1493 }
1494
1495 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1496 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1497 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
1498
1499 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1500 abort_flag, task_tag);
1501 if (rc)
1502 goto err_out_buf;
1503
1504 spin_lock_irqsave(&hisi_hba->lock, flags);
1505 list_add_tail(&slot->entry, &sas_dev->list);
1506 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1507 spin_lock_irqsave(&task->task_state_lock, flags);
1508 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1509 spin_unlock_irqrestore(&task->task_state_lock, flags);
1510
1511 dq->slot_prep = slot;
1512
1513 /* send abort command to the chip */
1514 hisi_hba->hw->start_delivery(dq);
1515 spin_unlock_irqrestore(&dq->lock, flags_dq);
1516
1517 return 0;
1518
1519 err_out_buf:
1520 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
1521 slot->buf_dma);
1522 err_out_tag:
1523 spin_lock_irqsave(&hisi_hba->lock, flags);
1524 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1525 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1526 spin_unlock_irqrestore(&dq->lock, flags_dq);
1527 err_out:
1528 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1529
1530 return rc;
1531 }
1532
1533 /**
1534 * hisi_sas_internal_task_abort -- execute an internal
1535 * abort command for single IO command or a device
1536 * @hisi_hba: host controller struct
1537 * @device: domain device
1538 * @abort_flag: mode of operation, device or single IO
1539 * @tag: tag of IO to be aborted (only relevant to single
1540 * IO mode)
1541 */
1542 static int
1543 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1544 struct domain_device *device,
1545 int abort_flag, int tag)
1546 {
1547 struct sas_task *task;
1548 struct hisi_sas_device *sas_dev = device->lldd_dev;
1549 struct device *dev = hisi_hba->dev;
1550 int res;
1551
1552 /*
1553 * The interface is not realized means this HW don't support internal
1554 * abort, or don't need to do internal abort. Then here, we return
1555 * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
1556 * the internal abort has been executed and returned CQ.
1557 */
1558 if (!hisi_hba->hw->prep_abort)
1559 return TMF_RESP_FUNC_FAILED;
1560
1561 task = sas_alloc_slow_task(GFP_KERNEL);
1562 if (!task)
1563 return -ENOMEM;
1564
1565 task->dev = device;
1566 task->task_proto = device->tproto;
1567 task->task_done = hisi_sas_task_done;
1568 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1569 task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT*HZ;
1570 add_timer(&task->slow_task->timer);
1571
1572 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1573 task, abort_flag, tag);
1574 if (res) {
1575 del_timer(&task->slow_task->timer);
1576 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1577 res);
1578 goto exit;
1579 }
1580 wait_for_completion(&task->slow_task->completion);
1581 res = TMF_RESP_FUNC_FAILED;
1582
1583 /* Internal abort timed out */
1584 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1585 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1586 struct hisi_sas_slot *slot = task->lldd_task;
1587
1588 if (slot)
1589 slot->task = NULL;
1590 dev_err(dev, "internal task abort: timeout and not done.\n");
1591 res = -EIO;
1592 goto exit;
1593 } else
1594 dev_err(dev, "internal task abort: timeout.\n");
1595 }
1596
1597 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1598 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1599 res = TMF_RESP_FUNC_COMPLETE;
1600 goto exit;
1601 }
1602
1603 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1604 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1605 res = TMF_RESP_FUNC_SUCC;
1606 goto exit;
1607 }
1608
1609 exit:
1610 dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1611 "resp: 0x%x sts 0x%x\n",
1612 SAS_ADDR(device->sas_addr),
1613 task,
1614 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1615 task->task_status.stat);
1616 sas_free_task(task);
1617
1618 return res;
1619 }
1620
1621 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1622 {
1623 hisi_sas_port_notify_formed(sas_phy);
1624 }
1625
1626 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
1627 {
1628 }
1629
1630 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
1631 u8 reg_index, u8 reg_count, u8 *write_data)
1632 {
1633 struct hisi_hba *hisi_hba = sha->lldd_ha;
1634
1635 if (!hisi_hba->hw->write_gpio)
1636 return -EOPNOTSUPP;
1637
1638 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
1639 reg_index, reg_count, write_data);
1640 }
1641
1642 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1643 {
1644 phy->phy_attached = 0;
1645 phy->phy_type = 0;
1646 phy->port = NULL;
1647 }
1648
1649 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1650 {
1651 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1652 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1653 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1654
1655 if (rdy) {
1656 /* Phy down but ready */
1657 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1658 hisi_sas_port_notify_formed(sas_phy);
1659 } else {
1660 struct hisi_sas_port *port = phy->port;
1661
1662 /* Phy down and not ready */
1663 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1664 sas_phy_disconnected(sas_phy);
1665
1666 if (port) {
1667 if (phy->phy_type & PORT_TYPE_SAS) {
1668 int port_id = port->id;
1669
1670 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1671 port_id))
1672 port->port_attached = 0;
1673 } else if (phy->phy_type & PORT_TYPE_SATA)
1674 port->port_attached = 0;
1675 }
1676 hisi_sas_phy_disconnected(phy);
1677 }
1678 }
1679 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1680
1681 void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba)
1682 {
1683 int i;
1684
1685 for (i = 0; i < hisi_hba->queue_count; i++) {
1686 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1687
1688 tasklet_kill(&cq->tasklet);
1689 }
1690 }
1691 EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
1692
1693 struct scsi_transport_template *hisi_sas_stt;
1694 EXPORT_SYMBOL_GPL(hisi_sas_stt);
1695
1696 static struct device_attribute *host_attrs[] = {
1697 &dev_attr_phy_event_threshold,
1698 NULL,
1699 };
1700
1701 static struct scsi_host_template _hisi_sas_sht = {
1702 .module = THIS_MODULE,
1703 .name = DRV_NAME,
1704 .queuecommand = sas_queuecommand,
1705 .target_alloc = sas_target_alloc,
1706 .slave_configure = hisi_sas_slave_configure,
1707 .scan_finished = hisi_sas_scan_finished,
1708 .scan_start = hisi_sas_scan_start,
1709 .change_queue_depth = sas_change_queue_depth,
1710 .bios_param = sas_bios_param,
1711 .can_queue = 1,
1712 .this_id = -1,
1713 .sg_tablesize = SG_ALL,
1714 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1715 .use_clustering = ENABLE_CLUSTERING,
1716 .eh_device_reset_handler = sas_eh_device_reset_handler,
1717 .eh_target_reset_handler = sas_eh_target_reset_handler,
1718 .target_destroy = sas_target_destroy,
1719 .ioctl = sas_ioctl,
1720 .shost_attrs = host_attrs,
1721 };
1722 struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
1723 EXPORT_SYMBOL_GPL(hisi_sas_sht);
1724
1725 static struct sas_domain_function_template hisi_sas_transport_ops = {
1726 .lldd_dev_found = hisi_sas_dev_found,
1727 .lldd_dev_gone = hisi_sas_dev_gone,
1728 .lldd_execute_task = hisi_sas_queue_command,
1729 .lldd_control_phy = hisi_sas_control_phy,
1730 .lldd_abort_task = hisi_sas_abort_task,
1731 .lldd_abort_task_set = hisi_sas_abort_task_set,
1732 .lldd_clear_aca = hisi_sas_clear_aca,
1733 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1734 .lldd_lu_reset = hisi_sas_lu_reset,
1735 .lldd_query_task = hisi_sas_query_task,
1736 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
1737 .lldd_port_formed = hisi_sas_port_formed,
1738 .lldd_port_deformed = hisi_sas_port_deformed,
1739 .lldd_write_gpio = hisi_sas_write_gpio,
1740 };
1741
1742 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
1743 {
1744 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1745
1746 for (i = 0; i < hisi_hba->queue_count; i++) {
1747 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1748 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1749
1750 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1751 memset(hisi_hba->cmd_hdr[i], 0, s);
1752 dq->wr_point = 0;
1753
1754 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1755 memset(hisi_hba->complete_hdr[i], 0, s);
1756 cq->rd_point = 0;
1757 }
1758
1759 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
1760 memset(hisi_hba->initial_fis, 0, s);
1761
1762 s = max_command_entries * sizeof(struct hisi_sas_iost);
1763 memset(hisi_hba->iost, 0, s);
1764
1765 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1766 memset(hisi_hba->breakpoint, 0, s);
1767
1768 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1769 memset(hisi_hba->sata_breakpoint, 0, s);
1770 }
1771 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
1772
1773 int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1774 {
1775 struct device *dev = hisi_hba->dev;
1776 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1777
1778 spin_lock_init(&hisi_hba->lock);
1779 for (i = 0; i < hisi_hba->n_phy; i++) {
1780 hisi_sas_phy_init(hisi_hba, i);
1781 hisi_hba->port[i].port_attached = 0;
1782 hisi_hba->port[i].id = -1;
1783 }
1784
1785 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1786 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1787 hisi_hba->devices[i].device_id = i;
1788 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1789 }
1790
1791 for (i = 0; i < hisi_hba->queue_count; i++) {
1792 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1793 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1794
1795 /* Completion queue structure */
1796 cq->id = i;
1797 cq->hisi_hba = hisi_hba;
1798
1799 /* Delivery queue structure */
1800 dq->id = i;
1801 dq->hisi_hba = hisi_hba;
1802
1803 /* Delivery queue */
1804 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1805 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1806 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1807 if (!hisi_hba->cmd_hdr[i])
1808 goto err_out;
1809
1810 /* Completion queue */
1811 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1812 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1813 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1814 if (!hisi_hba->complete_hdr[i])
1815 goto err_out;
1816 }
1817
1818 s = sizeof(struct hisi_sas_slot_buf_table);
1819 hisi_hba->buffer_pool = dma_pool_create("dma_buffer", dev, s, 16, 0);
1820 if (!hisi_hba->buffer_pool)
1821 goto err_out;
1822
1823 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1824 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1825 GFP_KERNEL);
1826 if (!hisi_hba->itct)
1827 goto err_out;
1828
1829 memset(hisi_hba->itct, 0, s);
1830
1831 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1832 sizeof(struct hisi_sas_slot),
1833 GFP_KERNEL);
1834 if (!hisi_hba->slot_info)
1835 goto err_out;
1836
1837 s = max_command_entries * sizeof(struct hisi_sas_iost);
1838 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1839 GFP_KERNEL);
1840 if (!hisi_hba->iost)
1841 goto err_out;
1842
1843 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1844 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1845 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1846 if (!hisi_hba->breakpoint)
1847 goto err_out;
1848
1849 hisi_hba->slot_index_count = max_command_entries;
1850 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1851 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1852 if (!hisi_hba->slot_index_tags)
1853 goto err_out;
1854
1855 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1856 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1857 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1858 if (!hisi_hba->initial_fis)
1859 goto err_out;
1860
1861 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1862 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1863 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1864 if (!hisi_hba->sata_breakpoint)
1865 goto err_out;
1866 hisi_sas_init_mem(hisi_hba);
1867
1868 hisi_sas_slot_index_init(hisi_hba);
1869
1870 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1871 if (!hisi_hba->wq) {
1872 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1873 goto err_out;
1874 }
1875
1876 return 0;
1877 err_out:
1878 return -ENOMEM;
1879 }
1880 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
1881
1882 void hisi_sas_free(struct hisi_hba *hisi_hba)
1883 {
1884 struct device *dev = hisi_hba->dev;
1885 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1886
1887 for (i = 0; i < hisi_hba->queue_count; i++) {
1888 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1889 if (hisi_hba->cmd_hdr[i])
1890 dma_free_coherent(dev, s,
1891 hisi_hba->cmd_hdr[i],
1892 hisi_hba->cmd_hdr_dma[i]);
1893
1894 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1895 if (hisi_hba->complete_hdr[i])
1896 dma_free_coherent(dev, s,
1897 hisi_hba->complete_hdr[i],
1898 hisi_hba->complete_hdr_dma[i]);
1899 }
1900
1901 dma_pool_destroy(hisi_hba->buffer_pool);
1902
1903 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1904 if (hisi_hba->itct)
1905 dma_free_coherent(dev, s,
1906 hisi_hba->itct, hisi_hba->itct_dma);
1907
1908 s = max_command_entries * sizeof(struct hisi_sas_iost);
1909 if (hisi_hba->iost)
1910 dma_free_coherent(dev, s,
1911 hisi_hba->iost, hisi_hba->iost_dma);
1912
1913 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1914 if (hisi_hba->breakpoint)
1915 dma_free_coherent(dev, s,
1916 hisi_hba->breakpoint,
1917 hisi_hba->breakpoint_dma);
1918
1919
1920 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1921 if (hisi_hba->initial_fis)
1922 dma_free_coherent(dev, s,
1923 hisi_hba->initial_fis,
1924 hisi_hba->initial_fis_dma);
1925
1926 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1927 if (hisi_hba->sata_breakpoint)
1928 dma_free_coherent(dev, s,
1929 hisi_hba->sata_breakpoint,
1930 hisi_hba->sata_breakpoint_dma);
1931
1932 if (hisi_hba->wq)
1933 destroy_workqueue(hisi_hba->wq);
1934 }
1935 EXPORT_SYMBOL_GPL(hisi_sas_free);
1936
1937 void hisi_sas_rst_work_handler(struct work_struct *work)
1938 {
1939 struct hisi_hba *hisi_hba =
1940 container_of(work, struct hisi_hba, rst_work);
1941
1942 hisi_sas_controller_reset(hisi_hba);
1943 }
1944 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
1945
1946 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
1947 {
1948 struct hisi_sas_rst *rst =
1949 container_of(work, struct hisi_sas_rst, work);
1950
1951 if (!hisi_sas_controller_reset(rst->hisi_hba))
1952 rst->done = true;
1953 complete(rst->completion);
1954 }
1955 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
1956
1957 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
1958 {
1959 struct device *dev = hisi_hba->dev;
1960 struct platform_device *pdev = hisi_hba->platform_dev;
1961 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
1962 struct clk *refclk;
1963
1964 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1965 SAS_ADDR_SIZE)) {
1966 dev_err(dev, "could not get property sas-addr\n");
1967 return -ENOENT;
1968 }
1969
1970 if (np) {
1971 /*
1972 * These properties are only required for platform device-based
1973 * controller with DT firmware.
1974 */
1975 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1976 "hisilicon,sas-syscon");
1977 if (IS_ERR(hisi_hba->ctrl)) {
1978 dev_err(dev, "could not get syscon\n");
1979 return -ENOENT;
1980 }
1981
1982 if (device_property_read_u32(dev, "ctrl-reset-reg",
1983 &hisi_hba->ctrl_reset_reg)) {
1984 dev_err(dev,
1985 "could not get property ctrl-reset-reg\n");
1986 return -ENOENT;
1987 }
1988
1989 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1990 &hisi_hba->ctrl_reset_sts_reg)) {
1991 dev_err(dev,
1992 "could not get property ctrl-reset-sts-reg\n");
1993 return -ENOENT;
1994 }
1995
1996 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1997 &hisi_hba->ctrl_clock_ena_reg)) {
1998 dev_err(dev,
1999 "could not get property ctrl-clock-ena-reg\n");
2000 return -ENOENT;
2001 }
2002 }
2003
2004 refclk = devm_clk_get(dev, NULL);
2005 if (IS_ERR(refclk))
2006 dev_dbg(dev, "no ref clk property\n");
2007 else
2008 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2009
2010 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2011 dev_err(dev, "could not get property phy-count\n");
2012 return -ENOENT;
2013 }
2014
2015 if (device_property_read_u32(dev, "queue-count",
2016 &hisi_hba->queue_count)) {
2017 dev_err(dev, "could not get property queue-count\n");
2018 return -ENOENT;
2019 }
2020
2021 return 0;
2022 }
2023 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2024
2025 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2026 const struct hisi_sas_hw *hw)
2027 {
2028 struct resource *res;
2029 struct Scsi_Host *shost;
2030 struct hisi_hba *hisi_hba;
2031 struct device *dev = &pdev->dev;
2032
2033 shost = scsi_host_alloc(hisi_sas_sht, sizeof(*hisi_hba));
2034 if (!shost) {
2035 dev_err(dev, "scsi host alloc failed\n");
2036 return NULL;
2037 }
2038 hisi_hba = shost_priv(shost);
2039
2040 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2041 hisi_hba->hw = hw;
2042 hisi_hba->dev = dev;
2043 hisi_hba->platform_dev = pdev;
2044 hisi_hba->shost = shost;
2045 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2046
2047 timer_setup(&hisi_hba->timer, NULL, 0);
2048
2049 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2050 goto err_out;
2051
2052 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
2053 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
2054 dev_err(dev, "No usable DMA addressing method\n");
2055 goto err_out;
2056 }
2057
2058 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2059 hisi_hba->regs = devm_ioremap_resource(dev, res);
2060 if (IS_ERR(hisi_hba->regs))
2061 goto err_out;
2062
2063 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2064 if (res) {
2065 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2066 if (IS_ERR(hisi_hba->sgpio_regs))
2067 goto err_out;
2068 }
2069
2070 if (hisi_sas_alloc(hisi_hba, shost)) {
2071 hisi_sas_free(hisi_hba);
2072 goto err_out;
2073 }
2074
2075 return shost;
2076 err_out:
2077 scsi_host_put(shost);
2078 dev_err(dev, "shost alloc failed\n");
2079 return NULL;
2080 }
2081
2082 void hisi_sas_init_add(struct hisi_hba *hisi_hba)
2083 {
2084 int i;
2085
2086 for (i = 0; i < hisi_hba->n_phy; i++)
2087 memcpy(&hisi_hba->phy[i].dev_sas_addr,
2088 hisi_hba->sas_addr,
2089 SAS_ADDR_SIZE);
2090 }
2091 EXPORT_SYMBOL_GPL(hisi_sas_init_add);
2092
2093 int hisi_sas_probe(struct platform_device *pdev,
2094 const struct hisi_sas_hw *hw)
2095 {
2096 struct Scsi_Host *shost;
2097 struct hisi_hba *hisi_hba;
2098 struct device *dev = &pdev->dev;
2099 struct asd_sas_phy **arr_phy;
2100 struct asd_sas_port **arr_port;
2101 struct sas_ha_struct *sha;
2102 int rc, phy_nr, port_nr, i;
2103
2104 shost = hisi_sas_shost_alloc(pdev, hw);
2105 if (!shost)
2106 return -ENOMEM;
2107
2108 sha = SHOST_TO_SAS_HA(shost);
2109 hisi_hba = shost_priv(shost);
2110 platform_set_drvdata(pdev, sha);
2111
2112 phy_nr = port_nr = hisi_hba->n_phy;
2113
2114 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2115 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2116 if (!arr_phy || !arr_port) {
2117 rc = -ENOMEM;
2118 goto err_out_ha;
2119 }
2120
2121 sha->sas_phy = arr_phy;
2122 sha->sas_port = arr_port;
2123 sha->lldd_ha = hisi_hba;
2124
2125 shost->transportt = hisi_sas_stt;
2126 shost->max_id = HISI_SAS_MAX_DEVICES;
2127 shost->max_lun = ~0;
2128 shost->max_channel = 1;
2129 shost->max_cmd_len = 16;
2130 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
2131 shost->can_queue = hisi_hba->hw->max_command_entries;
2132 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
2133
2134 sha->sas_ha_name = DRV_NAME;
2135 sha->dev = hisi_hba->dev;
2136 sha->lldd_module = THIS_MODULE;
2137 sha->sas_addr = &hisi_hba->sas_addr[0];
2138 sha->num_phys = hisi_hba->n_phy;
2139 sha->core.shost = hisi_hba->shost;
2140
2141 for (i = 0; i < hisi_hba->n_phy; i++) {
2142 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2143 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2144 }
2145
2146 hisi_sas_init_add(hisi_hba);
2147
2148 rc = scsi_add_host(shost, &pdev->dev);
2149 if (rc)
2150 goto err_out_ha;
2151
2152 rc = sas_register_ha(sha);
2153 if (rc)
2154 goto err_out_register_ha;
2155
2156 rc = hisi_hba->hw->hw_init(hisi_hba);
2157 if (rc)
2158 goto err_out_register_ha;
2159
2160 scsi_scan_host(shost);
2161
2162 return 0;
2163
2164 err_out_register_ha:
2165 scsi_remove_host(shost);
2166 err_out_ha:
2167 hisi_sas_free(hisi_hba);
2168 scsi_host_put(shost);
2169 return rc;
2170 }
2171 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2172
2173 int hisi_sas_remove(struct platform_device *pdev)
2174 {
2175 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2176 struct hisi_hba *hisi_hba = sha->lldd_ha;
2177 struct Scsi_Host *shost = sha->core.shost;
2178
2179 sas_unregister_ha(sha);
2180 sas_remove_host(sha->core.shost);
2181
2182 hisi_sas_free(hisi_hba);
2183 scsi_host_put(shost);
2184 return 0;
2185 }
2186 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2187
2188 static __init int hisi_sas_init(void)
2189 {
2190 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2191 if (!hisi_sas_stt)
2192 return -ENOMEM;
2193
2194 return 0;
2195 }
2196
2197 static __exit void hisi_sas_exit(void)
2198 {
2199 sas_release_transport(hisi_sas_stt);
2200 }
2201
2202 module_init(hisi_sas_init);
2203 module_exit(hisi_sas_exit);
2204
2205 MODULE_LICENSE("GPL");
2206 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2207 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2208 MODULE_ALIAS("platform:" DRV_NAME);
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