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scsi: hisi_sas: Add some checks to avoid free'ing a sas_task twice
[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 spin_lock_irqsave(&task->task_state_lock, flags);
1179 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1180 spin_unlock_irqrestore(&task->task_state_lock, flags);
1181 rc = TMF_RESP_FUNC_COMPLETE;
1182 goto out;
1183 }
1184 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1185 spin_unlock_irqrestore(&task->task_state_lock, flags);
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 /* send abort command to the chip */
1518 hisi_hba->hw->start_delivery(dq);
1519 spin_unlock_irqrestore(&dq->lock, flags_dq);
1520
1521 return 0;
1522
1523 err_out_buf:
1524 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
1525 slot->buf_dma);
1526 err_out_tag:
1527 spin_lock_irqsave(&hisi_hba->lock, flags);
1528 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1529 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1530 spin_unlock_irqrestore(&dq->lock, flags_dq);
1531 err_out:
1532 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1533
1534 return rc;
1535 }
1536
1537 /**
1538 * hisi_sas_internal_task_abort -- execute an internal
1539 * abort command for single IO command or a device
1540 * @hisi_hba: host controller struct
1541 * @device: domain device
1542 * @abort_flag: mode of operation, device or single IO
1543 * @tag: tag of IO to be aborted (only relevant to single
1544 * IO mode)
1545 */
1546 static int
1547 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1548 struct domain_device *device,
1549 int abort_flag, int tag)
1550 {
1551 struct sas_task *task;
1552 struct hisi_sas_device *sas_dev = device->lldd_dev;
1553 struct device *dev = hisi_hba->dev;
1554 int res;
1555
1556 /*
1557 * The interface is not realized means this HW don't support internal
1558 * abort, or don't need to do internal abort. Then here, we return
1559 * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
1560 * the internal abort has been executed and returned CQ.
1561 */
1562 if (!hisi_hba->hw->prep_abort)
1563 return TMF_RESP_FUNC_FAILED;
1564
1565 task = sas_alloc_slow_task(GFP_KERNEL);
1566 if (!task)
1567 return -ENOMEM;
1568
1569 task->dev = device;
1570 task->task_proto = device->tproto;
1571 task->task_done = hisi_sas_task_done;
1572 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1573 task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT*HZ;
1574 add_timer(&task->slow_task->timer);
1575
1576 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1577 task, abort_flag, tag);
1578 if (res) {
1579 del_timer(&task->slow_task->timer);
1580 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1581 res);
1582 goto exit;
1583 }
1584 wait_for_completion(&task->slow_task->completion);
1585 res = TMF_RESP_FUNC_FAILED;
1586
1587 /* Internal abort timed out */
1588 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1589 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1590 struct hisi_sas_slot *slot = task->lldd_task;
1591
1592 if (slot)
1593 slot->task = NULL;
1594 dev_err(dev, "internal task abort: timeout and not done.\n");
1595 res = -EIO;
1596 goto exit;
1597 } else
1598 dev_err(dev, "internal task abort: timeout.\n");
1599 }
1600
1601 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1602 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1603 res = TMF_RESP_FUNC_COMPLETE;
1604 goto exit;
1605 }
1606
1607 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1608 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1609 res = TMF_RESP_FUNC_SUCC;
1610 goto exit;
1611 }
1612
1613 exit:
1614 dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1615 "resp: 0x%x sts 0x%x\n",
1616 SAS_ADDR(device->sas_addr),
1617 task,
1618 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1619 task->task_status.stat);
1620 sas_free_task(task);
1621
1622 return res;
1623 }
1624
1625 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1626 {
1627 hisi_sas_port_notify_formed(sas_phy);
1628 }
1629
1630 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
1631 {
1632 }
1633
1634 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
1635 u8 reg_index, u8 reg_count, u8 *write_data)
1636 {
1637 struct hisi_hba *hisi_hba = sha->lldd_ha;
1638
1639 if (!hisi_hba->hw->write_gpio)
1640 return -EOPNOTSUPP;
1641
1642 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
1643 reg_index, reg_count, write_data);
1644 }
1645
1646 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1647 {
1648 phy->phy_attached = 0;
1649 phy->phy_type = 0;
1650 phy->port = NULL;
1651 }
1652
1653 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1654 {
1655 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1656 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1657 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1658
1659 if (rdy) {
1660 /* Phy down but ready */
1661 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1662 hisi_sas_port_notify_formed(sas_phy);
1663 } else {
1664 struct hisi_sas_port *port = phy->port;
1665
1666 /* Phy down and not ready */
1667 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1668 sas_phy_disconnected(sas_phy);
1669
1670 if (port) {
1671 if (phy->phy_type & PORT_TYPE_SAS) {
1672 int port_id = port->id;
1673
1674 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1675 port_id))
1676 port->port_attached = 0;
1677 } else if (phy->phy_type & PORT_TYPE_SATA)
1678 port->port_attached = 0;
1679 }
1680 hisi_sas_phy_disconnected(phy);
1681 }
1682 }
1683 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1684
1685 void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba)
1686 {
1687 int i;
1688
1689 for (i = 0; i < hisi_hba->queue_count; i++) {
1690 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1691
1692 tasklet_kill(&cq->tasklet);
1693 }
1694 }
1695 EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
1696
1697 struct scsi_transport_template *hisi_sas_stt;
1698 EXPORT_SYMBOL_GPL(hisi_sas_stt);
1699
1700 static struct device_attribute *host_attrs[] = {
1701 &dev_attr_phy_event_threshold,
1702 NULL,
1703 };
1704
1705 static struct scsi_host_template _hisi_sas_sht = {
1706 .module = THIS_MODULE,
1707 .name = DRV_NAME,
1708 .queuecommand = sas_queuecommand,
1709 .target_alloc = sas_target_alloc,
1710 .slave_configure = hisi_sas_slave_configure,
1711 .scan_finished = hisi_sas_scan_finished,
1712 .scan_start = hisi_sas_scan_start,
1713 .change_queue_depth = sas_change_queue_depth,
1714 .bios_param = sas_bios_param,
1715 .can_queue = 1,
1716 .this_id = -1,
1717 .sg_tablesize = SG_ALL,
1718 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1719 .use_clustering = ENABLE_CLUSTERING,
1720 .eh_device_reset_handler = sas_eh_device_reset_handler,
1721 .eh_target_reset_handler = sas_eh_target_reset_handler,
1722 .target_destroy = sas_target_destroy,
1723 .ioctl = sas_ioctl,
1724 .shost_attrs = host_attrs,
1725 };
1726 struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
1727 EXPORT_SYMBOL_GPL(hisi_sas_sht);
1728
1729 static struct sas_domain_function_template hisi_sas_transport_ops = {
1730 .lldd_dev_found = hisi_sas_dev_found,
1731 .lldd_dev_gone = hisi_sas_dev_gone,
1732 .lldd_execute_task = hisi_sas_queue_command,
1733 .lldd_control_phy = hisi_sas_control_phy,
1734 .lldd_abort_task = hisi_sas_abort_task,
1735 .lldd_abort_task_set = hisi_sas_abort_task_set,
1736 .lldd_clear_aca = hisi_sas_clear_aca,
1737 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1738 .lldd_lu_reset = hisi_sas_lu_reset,
1739 .lldd_query_task = hisi_sas_query_task,
1740 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
1741 .lldd_port_formed = hisi_sas_port_formed,
1742 .lldd_port_deformed = hisi_sas_port_deformed,
1743 .lldd_write_gpio = hisi_sas_write_gpio,
1744 };
1745
1746 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
1747 {
1748 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1749
1750 for (i = 0; i < hisi_hba->queue_count; i++) {
1751 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1752 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1753
1754 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1755 memset(hisi_hba->cmd_hdr[i], 0, s);
1756 dq->wr_point = 0;
1757
1758 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1759 memset(hisi_hba->complete_hdr[i], 0, s);
1760 cq->rd_point = 0;
1761 }
1762
1763 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
1764 memset(hisi_hba->initial_fis, 0, s);
1765
1766 s = max_command_entries * sizeof(struct hisi_sas_iost);
1767 memset(hisi_hba->iost, 0, s);
1768
1769 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1770 memset(hisi_hba->breakpoint, 0, s);
1771
1772 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1773 memset(hisi_hba->sata_breakpoint, 0, s);
1774 }
1775 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
1776
1777 int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1778 {
1779 struct device *dev = hisi_hba->dev;
1780 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1781
1782 spin_lock_init(&hisi_hba->lock);
1783 for (i = 0; i < hisi_hba->n_phy; i++) {
1784 hisi_sas_phy_init(hisi_hba, i);
1785 hisi_hba->port[i].port_attached = 0;
1786 hisi_hba->port[i].id = -1;
1787 }
1788
1789 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1790 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1791 hisi_hba->devices[i].device_id = i;
1792 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1793 }
1794
1795 for (i = 0; i < hisi_hba->queue_count; i++) {
1796 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1797 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1798
1799 /* Completion queue structure */
1800 cq->id = i;
1801 cq->hisi_hba = hisi_hba;
1802
1803 /* Delivery queue structure */
1804 spin_lock_init(&dq->lock);
1805 dq->id = i;
1806 dq->hisi_hba = hisi_hba;
1807
1808 /* Delivery queue */
1809 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1810 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1811 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1812 if (!hisi_hba->cmd_hdr[i])
1813 goto err_out;
1814
1815 /* Completion queue */
1816 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1817 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1818 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1819 if (!hisi_hba->complete_hdr[i])
1820 goto err_out;
1821 }
1822
1823 s = sizeof(struct hisi_sas_slot_buf_table);
1824 hisi_hba->buffer_pool = dma_pool_create("dma_buffer", dev, s, 16, 0);
1825 if (!hisi_hba->buffer_pool)
1826 goto err_out;
1827
1828 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1829 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1830 GFP_KERNEL);
1831 if (!hisi_hba->itct)
1832 goto err_out;
1833
1834 memset(hisi_hba->itct, 0, s);
1835
1836 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1837 sizeof(struct hisi_sas_slot),
1838 GFP_KERNEL);
1839 if (!hisi_hba->slot_info)
1840 goto err_out;
1841
1842 s = max_command_entries * sizeof(struct hisi_sas_iost);
1843 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1844 GFP_KERNEL);
1845 if (!hisi_hba->iost)
1846 goto err_out;
1847
1848 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1849 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1850 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1851 if (!hisi_hba->breakpoint)
1852 goto err_out;
1853
1854 hisi_hba->slot_index_count = max_command_entries;
1855 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1856 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1857 if (!hisi_hba->slot_index_tags)
1858 goto err_out;
1859
1860 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1861 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1862 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1863 if (!hisi_hba->initial_fis)
1864 goto err_out;
1865
1866 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1867 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1868 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1869 if (!hisi_hba->sata_breakpoint)
1870 goto err_out;
1871 hisi_sas_init_mem(hisi_hba);
1872
1873 hisi_sas_slot_index_init(hisi_hba);
1874
1875 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1876 if (!hisi_hba->wq) {
1877 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1878 goto err_out;
1879 }
1880
1881 return 0;
1882 err_out:
1883 return -ENOMEM;
1884 }
1885 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
1886
1887 void hisi_sas_free(struct hisi_hba *hisi_hba)
1888 {
1889 struct device *dev = hisi_hba->dev;
1890 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1891
1892 for (i = 0; i < hisi_hba->queue_count; i++) {
1893 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1894 if (hisi_hba->cmd_hdr[i])
1895 dma_free_coherent(dev, s,
1896 hisi_hba->cmd_hdr[i],
1897 hisi_hba->cmd_hdr_dma[i]);
1898
1899 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1900 if (hisi_hba->complete_hdr[i])
1901 dma_free_coherent(dev, s,
1902 hisi_hba->complete_hdr[i],
1903 hisi_hba->complete_hdr_dma[i]);
1904 }
1905
1906 dma_pool_destroy(hisi_hba->buffer_pool);
1907
1908 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1909 if (hisi_hba->itct)
1910 dma_free_coherent(dev, s,
1911 hisi_hba->itct, hisi_hba->itct_dma);
1912
1913 s = max_command_entries * sizeof(struct hisi_sas_iost);
1914 if (hisi_hba->iost)
1915 dma_free_coherent(dev, s,
1916 hisi_hba->iost, hisi_hba->iost_dma);
1917
1918 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1919 if (hisi_hba->breakpoint)
1920 dma_free_coherent(dev, s,
1921 hisi_hba->breakpoint,
1922 hisi_hba->breakpoint_dma);
1923
1924
1925 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1926 if (hisi_hba->initial_fis)
1927 dma_free_coherent(dev, s,
1928 hisi_hba->initial_fis,
1929 hisi_hba->initial_fis_dma);
1930
1931 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1932 if (hisi_hba->sata_breakpoint)
1933 dma_free_coherent(dev, s,
1934 hisi_hba->sata_breakpoint,
1935 hisi_hba->sata_breakpoint_dma);
1936
1937 if (hisi_hba->wq)
1938 destroy_workqueue(hisi_hba->wq);
1939 }
1940 EXPORT_SYMBOL_GPL(hisi_sas_free);
1941
1942 void hisi_sas_rst_work_handler(struct work_struct *work)
1943 {
1944 struct hisi_hba *hisi_hba =
1945 container_of(work, struct hisi_hba, rst_work);
1946
1947 hisi_sas_controller_reset(hisi_hba);
1948 }
1949 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
1950
1951 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
1952 {
1953 struct hisi_sas_rst *rst =
1954 container_of(work, struct hisi_sas_rst, work);
1955
1956 if (!hisi_sas_controller_reset(rst->hisi_hba))
1957 rst->done = true;
1958 complete(rst->completion);
1959 }
1960 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
1961
1962 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
1963 {
1964 struct device *dev = hisi_hba->dev;
1965 struct platform_device *pdev = hisi_hba->platform_dev;
1966 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
1967 struct clk *refclk;
1968
1969 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1970 SAS_ADDR_SIZE)) {
1971 dev_err(dev, "could not get property sas-addr\n");
1972 return -ENOENT;
1973 }
1974
1975 if (np) {
1976 /*
1977 * These properties are only required for platform device-based
1978 * controller with DT firmware.
1979 */
1980 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1981 "hisilicon,sas-syscon");
1982 if (IS_ERR(hisi_hba->ctrl)) {
1983 dev_err(dev, "could not get syscon\n");
1984 return -ENOENT;
1985 }
1986
1987 if (device_property_read_u32(dev, "ctrl-reset-reg",
1988 &hisi_hba->ctrl_reset_reg)) {
1989 dev_err(dev,
1990 "could not get property ctrl-reset-reg\n");
1991 return -ENOENT;
1992 }
1993
1994 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1995 &hisi_hba->ctrl_reset_sts_reg)) {
1996 dev_err(dev,
1997 "could not get property ctrl-reset-sts-reg\n");
1998 return -ENOENT;
1999 }
2000
2001 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2002 &hisi_hba->ctrl_clock_ena_reg)) {
2003 dev_err(dev,
2004 "could not get property ctrl-clock-ena-reg\n");
2005 return -ENOENT;
2006 }
2007 }
2008
2009 refclk = devm_clk_get(dev, NULL);
2010 if (IS_ERR(refclk))
2011 dev_dbg(dev, "no ref clk property\n");
2012 else
2013 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2014
2015 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2016 dev_err(dev, "could not get property phy-count\n");
2017 return -ENOENT;
2018 }
2019
2020 if (device_property_read_u32(dev, "queue-count",
2021 &hisi_hba->queue_count)) {
2022 dev_err(dev, "could not get property queue-count\n");
2023 return -ENOENT;
2024 }
2025
2026 return 0;
2027 }
2028 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2029
2030 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2031 const struct hisi_sas_hw *hw)
2032 {
2033 struct resource *res;
2034 struct Scsi_Host *shost;
2035 struct hisi_hba *hisi_hba;
2036 struct device *dev = &pdev->dev;
2037
2038 shost = scsi_host_alloc(hisi_sas_sht, sizeof(*hisi_hba));
2039 if (!shost) {
2040 dev_err(dev, "scsi host alloc failed\n");
2041 return NULL;
2042 }
2043 hisi_hba = shost_priv(shost);
2044
2045 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2046 hisi_hba->hw = hw;
2047 hisi_hba->dev = dev;
2048 hisi_hba->platform_dev = pdev;
2049 hisi_hba->shost = shost;
2050 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2051
2052 timer_setup(&hisi_hba->timer, NULL, 0);
2053
2054 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2055 goto err_out;
2056
2057 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
2058 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
2059 dev_err(dev, "No usable DMA addressing method\n");
2060 goto err_out;
2061 }
2062
2063 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2064 hisi_hba->regs = devm_ioremap_resource(dev, res);
2065 if (IS_ERR(hisi_hba->regs))
2066 goto err_out;
2067
2068 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2069 if (res) {
2070 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2071 if (IS_ERR(hisi_hba->sgpio_regs))
2072 goto err_out;
2073 }
2074
2075 if (hisi_sas_alloc(hisi_hba, shost)) {
2076 hisi_sas_free(hisi_hba);
2077 goto err_out;
2078 }
2079
2080 return shost;
2081 err_out:
2082 scsi_host_put(shost);
2083 dev_err(dev, "shost alloc failed\n");
2084 return NULL;
2085 }
2086
2087 void hisi_sas_init_add(struct hisi_hba *hisi_hba)
2088 {
2089 int i;
2090
2091 for (i = 0; i < hisi_hba->n_phy; i++)
2092 memcpy(&hisi_hba->phy[i].dev_sas_addr,
2093 hisi_hba->sas_addr,
2094 SAS_ADDR_SIZE);
2095 }
2096 EXPORT_SYMBOL_GPL(hisi_sas_init_add);
2097
2098 int hisi_sas_probe(struct platform_device *pdev,
2099 const struct hisi_sas_hw *hw)
2100 {
2101 struct Scsi_Host *shost;
2102 struct hisi_hba *hisi_hba;
2103 struct device *dev = &pdev->dev;
2104 struct asd_sas_phy **arr_phy;
2105 struct asd_sas_port **arr_port;
2106 struct sas_ha_struct *sha;
2107 int rc, phy_nr, port_nr, i;
2108
2109 shost = hisi_sas_shost_alloc(pdev, hw);
2110 if (!shost)
2111 return -ENOMEM;
2112
2113 sha = SHOST_TO_SAS_HA(shost);
2114 hisi_hba = shost_priv(shost);
2115 platform_set_drvdata(pdev, sha);
2116
2117 phy_nr = port_nr = hisi_hba->n_phy;
2118
2119 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2120 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2121 if (!arr_phy || !arr_port) {
2122 rc = -ENOMEM;
2123 goto err_out_ha;
2124 }
2125
2126 sha->sas_phy = arr_phy;
2127 sha->sas_port = arr_port;
2128 sha->lldd_ha = hisi_hba;
2129
2130 shost->transportt = hisi_sas_stt;
2131 shost->max_id = HISI_SAS_MAX_DEVICES;
2132 shost->max_lun = ~0;
2133 shost->max_channel = 1;
2134 shost->max_cmd_len = 16;
2135 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
2136 shost->can_queue = hisi_hba->hw->max_command_entries;
2137 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
2138
2139 sha->sas_ha_name = DRV_NAME;
2140 sha->dev = hisi_hba->dev;
2141 sha->lldd_module = THIS_MODULE;
2142 sha->sas_addr = &hisi_hba->sas_addr[0];
2143 sha->num_phys = hisi_hba->n_phy;
2144 sha->core.shost = hisi_hba->shost;
2145
2146 for (i = 0; i < hisi_hba->n_phy; i++) {
2147 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2148 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2149 }
2150
2151 hisi_sas_init_add(hisi_hba);
2152
2153 rc = scsi_add_host(shost, &pdev->dev);
2154 if (rc)
2155 goto err_out_ha;
2156
2157 rc = sas_register_ha(sha);
2158 if (rc)
2159 goto err_out_register_ha;
2160
2161 rc = hisi_hba->hw->hw_init(hisi_hba);
2162 if (rc)
2163 goto err_out_register_ha;
2164
2165 scsi_scan_host(shost);
2166
2167 return 0;
2168
2169 err_out_register_ha:
2170 scsi_remove_host(shost);
2171 err_out_ha:
2172 hisi_sas_free(hisi_hba);
2173 scsi_host_put(shost);
2174 return rc;
2175 }
2176 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2177
2178 int hisi_sas_remove(struct platform_device *pdev)
2179 {
2180 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2181 struct hisi_hba *hisi_hba = sha->lldd_ha;
2182 struct Scsi_Host *shost = sha->core.shost;
2183
2184 if (timer_pending(&hisi_hba->timer))
2185 del_timer(&hisi_hba->timer);
2186
2187 sas_unregister_ha(sha);
2188 sas_remove_host(sha->core.shost);
2189
2190 hisi_sas_free(hisi_hba);
2191 scsi_host_put(shost);
2192 return 0;
2193 }
2194 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2195
2196 static __init int hisi_sas_init(void)
2197 {
2198 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2199 if (!hisi_sas_stt)
2200 return -ENOMEM;
2201
2202 return 0;
2203 }
2204
2205 static __exit void hisi_sas_exit(void)
2206 {
2207 sas_release_transport(hisi_sas_stt);
2208 }
2209
2210 module_init(hisi_sas_init);
2211 module_exit(hisi_sas_exit);
2212
2213 MODULE_LICENSE("GPL");
2214 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2215 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2216 MODULE_ALIAS("platform:" DRV_NAME);
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