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vt: vt_ioctl: fix VT_DISALLOCATE freeing in-use virtual console
[linux/fpc-iii.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
blob33191673249c049f866470dbab617be9cac180a4
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 #include "../libsas/sas_internal.h"
14 #define DRV_NAME "hisi_sas"
15
16 #define DEV_IS_GONE(dev) \
17 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
18
19 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
20 u8 *lun, struct hisi_sas_tmf_task *tmf);
21 static int
22 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
23 struct domain_device *device,
24 int abort_flag, int tag);
25 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
26 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
27 void *funcdata);
28 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
29 struct domain_device *device);
30 static void hisi_sas_dev_gone(struct domain_device *device);
31
32 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
33 {
34 switch (fis->command) {
35 case ATA_CMD_FPDMA_WRITE:
36 case ATA_CMD_FPDMA_READ:
37 case ATA_CMD_FPDMA_RECV:
38 case ATA_CMD_FPDMA_SEND:
39 case ATA_CMD_NCQ_NON_DATA:
40 return HISI_SAS_SATA_PROTOCOL_FPDMA;
41
42 case ATA_CMD_DOWNLOAD_MICRO:
43 case ATA_CMD_ID_ATA:
44 case ATA_CMD_PMP_READ:
45 case ATA_CMD_READ_LOG_EXT:
46 case ATA_CMD_PIO_READ:
47 case ATA_CMD_PIO_READ_EXT:
48 case ATA_CMD_PMP_WRITE:
49 case ATA_CMD_WRITE_LOG_EXT:
50 case ATA_CMD_PIO_WRITE:
51 case ATA_CMD_PIO_WRITE_EXT:
52 return HISI_SAS_SATA_PROTOCOL_PIO;
53
54 case ATA_CMD_DSM:
55 case ATA_CMD_DOWNLOAD_MICRO_DMA:
56 case ATA_CMD_PMP_READ_DMA:
57 case ATA_CMD_PMP_WRITE_DMA:
58 case ATA_CMD_READ:
59 case ATA_CMD_READ_EXT:
60 case ATA_CMD_READ_LOG_DMA_EXT:
61 case ATA_CMD_READ_STREAM_DMA_EXT:
62 case ATA_CMD_TRUSTED_RCV_DMA:
63 case ATA_CMD_TRUSTED_SND_DMA:
64 case ATA_CMD_WRITE:
65 case ATA_CMD_WRITE_EXT:
66 case ATA_CMD_WRITE_FUA_EXT:
67 case ATA_CMD_WRITE_QUEUED:
68 case ATA_CMD_WRITE_LOG_DMA_EXT:
69 case ATA_CMD_WRITE_STREAM_DMA_EXT:
70 case ATA_CMD_ZAC_MGMT_IN:
71 return HISI_SAS_SATA_PROTOCOL_DMA;
72
73 case ATA_CMD_CHK_POWER:
74 case ATA_CMD_DEV_RESET:
75 case ATA_CMD_EDD:
76 case ATA_CMD_FLUSH:
77 case ATA_CMD_FLUSH_EXT:
78 case ATA_CMD_VERIFY:
79 case ATA_CMD_VERIFY_EXT:
80 case ATA_CMD_SET_FEATURES:
81 case ATA_CMD_STANDBY:
82 case ATA_CMD_STANDBYNOW1:
83 case ATA_CMD_ZAC_MGMT_OUT:
84 return HISI_SAS_SATA_PROTOCOL_NONDATA;
85
86 case ATA_CMD_SET_MAX:
87 switch (fis->features) {
88 case ATA_SET_MAX_PASSWD:
89 case ATA_SET_MAX_LOCK:
90 return HISI_SAS_SATA_PROTOCOL_PIO;
91
92 case ATA_SET_MAX_PASSWD_DMA:
93 case ATA_SET_MAX_UNLOCK_DMA:
94 return HISI_SAS_SATA_PROTOCOL_DMA;
95
96 default:
97 return HISI_SAS_SATA_PROTOCOL_NONDATA;
98 }
99
100 default:
101 {
102 if (direction == DMA_NONE)
103 return HISI_SAS_SATA_PROTOCOL_NONDATA;
104 return HISI_SAS_SATA_PROTOCOL_PIO;
105 }
106 }
107 }
108 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
109
110 void hisi_sas_sata_done(struct sas_task *task,
111 struct hisi_sas_slot *slot)
112 {
113 struct task_status_struct *ts = &task->task_status;
114 struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
115 struct hisi_sas_status_buffer *status_buf =
116 hisi_sas_status_buf_addr_mem(slot);
117 u8 *iu = &status_buf->iu[0];
118 struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu;
119
120 resp->frame_len = sizeof(struct dev_to_host_fis);
121 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
122
123 ts->buf_valid_size = sizeof(*resp);
124 }
125 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
126
127 int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag)
128 {
129 struct ata_queued_cmd *qc = task->uldd_task;
130
131 if (qc) {
132 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
133 qc->tf.command == ATA_CMD_FPDMA_READ) {
134 *tag = qc->tag;
135 return 1;
136 }
137 }
138 return 0;
139 }
140 EXPORT_SYMBOL_GPL(hisi_sas_get_ncq_tag);
141
142 /*
143 * This function assumes linkrate mask fits in 8 bits, which it
144 * does for all HW versions supported.
145 */
146 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
147 {
148 u16 rate = 0;
149 int i;
150
151 max -= SAS_LINK_RATE_1_5_GBPS;
152 for (i = 0; i <= max; i++)
153 rate |= 1 << (i * 2);
154 return rate;
155 }
156 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
157
158 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
159 {
160 return device->port->ha->lldd_ha;
161 }
162
163 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
164 {
165 return container_of(sas_port, struct hisi_sas_port, sas_port);
166 }
167 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
168
169 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
170 {
171 int phy_no;
172
173 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
174 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
175 }
176 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
177
178 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
179 {
180 void *bitmap = hisi_hba->slot_index_tags;
181
182 clear_bit(slot_idx, bitmap);
183 }
184
185 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
186 {
187 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
188 }
189
190 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
191 {
192 void *bitmap = hisi_hba->slot_index_tags;
193
194 set_bit(slot_idx, bitmap);
195 }
196
197 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
198 {
199 unsigned int index;
200 void *bitmap = hisi_hba->slot_index_tags;
201
202 index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
203 hisi_hba->last_slot_index + 1);
204 if (index >= hisi_hba->slot_index_count) {
205 index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
206 0);
207 if (index >= hisi_hba->slot_index_count)
208 return -SAS_QUEUE_FULL;
209 }
210 hisi_sas_slot_index_set(hisi_hba, index);
211 *slot_idx = index;
212 hisi_hba->last_slot_index = index;
213
214 return 0;
215 }
216
217 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
218 {
219 int i;
220
221 for (i = 0; i < hisi_hba->slot_index_count; ++i)
222 hisi_sas_slot_index_clear(hisi_hba, i);
223 }
224
225 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
226 struct hisi_sas_slot *slot)
227 {
228 struct hisi_sas_dq *dq = &hisi_hba->dq[slot->dlvry_queue];
229 unsigned long flags;
230
231 if (task) {
232 struct device *dev = hisi_hba->dev;
233
234 if (!task->lldd_task)
235 return;
236
237 task->lldd_task = NULL;
238
239 if (!sas_protocol_ata(task->task_proto))
240 if (slot->n_elem)
241 dma_unmap_sg(dev, task->scatter,
242 task->num_scatter,
243 task->data_dir);
244 }
245
246
247 spin_lock_irqsave(&dq->lock, flags);
248 list_del_init(&slot->entry);
249 spin_unlock_irqrestore(&dq->lock, flags);
250
251 memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
252
253 spin_lock_irqsave(&hisi_hba->lock, flags);
254 hisi_sas_slot_index_free(hisi_hba, slot->idx);
255 spin_unlock_irqrestore(&hisi_hba->lock, flags);
256 }
257 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
258
259 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
260 struct hisi_sas_slot *slot)
261 {
262 hisi_hba->hw->prep_smp(hisi_hba, slot);
263 }
264
265 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
266 struct hisi_sas_slot *slot)
267 {
268 hisi_hba->hw->prep_ssp(hisi_hba, slot);
269 }
270
271 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
272 struct hisi_sas_slot *slot)
273 {
274 hisi_hba->hw->prep_stp(hisi_hba, slot);
275 }
276
277 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
278 struct hisi_sas_slot *slot,
279 int device_id, int abort_flag, int tag_to_abort)
280 {
281 hisi_hba->hw->prep_abort(hisi_hba, slot,
282 device_id, abort_flag, tag_to_abort);
283 }
284
285 static int hisi_sas_task_prep(struct sas_task *task,
286 struct hisi_sas_dq **dq_pointer,
287 bool is_tmf, struct hisi_sas_tmf_task *tmf,
288 int *pass)
289 {
290 struct domain_device *device = task->dev;
291 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
292 struct hisi_sas_device *sas_dev = device->lldd_dev;
293 struct hisi_sas_port *port;
294 struct hisi_sas_slot *slot;
295 struct hisi_sas_cmd_hdr *cmd_hdr_base;
296 struct asd_sas_port *sas_port = device->port;
297 struct device *dev = hisi_hba->dev;
298 int dlvry_queue_slot, dlvry_queue, rc, slot_idx;
299 int n_elem = 0, n_elem_req = 0, n_elem_resp = 0;
300 struct hisi_sas_dq *dq;
301 unsigned long flags;
302 int wr_q_index;
303
304 if (!sas_port) {
305 struct task_status_struct *ts = &task->task_status;
306
307 ts->resp = SAS_TASK_UNDELIVERED;
308 ts->stat = SAS_PHY_DOWN;
309 /*
310 * libsas will use dev->port, should
311 * not call task_done for sata
312 */
313 if (device->dev_type != SAS_SATA_DEV)
314 task->task_done(task);
315 return -ECOMM;
316 }
317
318 if (DEV_IS_GONE(sas_dev)) {
319 if (sas_dev)
320 dev_info(dev, "task prep: device %d not ready\n",
321 sas_dev->device_id);
322 else
323 dev_info(dev, "task prep: device %016llx not ready\n",
324 SAS_ADDR(device->sas_addr));
325
326 return -ECOMM;
327 }
328
329 *dq_pointer = dq = sas_dev->dq;
330
331 port = to_hisi_sas_port(sas_port);
332 if (port && !port->port_attached) {
333 dev_info(dev, "task prep: %s port%d not attach device\n",
334 (dev_is_sata(device)) ?
335 "SATA/STP" : "SAS",
336 device->port->id);
337
338 return -ECOMM;
339 }
340
341 if (!sas_protocol_ata(task->task_proto)) {
342 unsigned int req_len, resp_len;
343
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 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
352 n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
353 1, DMA_TO_DEVICE);
354 if (!n_elem_req) {
355 rc = -ENOMEM;
356 goto prep_out;
357 }
358 req_len = sg_dma_len(&task->smp_task.smp_req);
359 if (req_len & 0x3) {
360 rc = -EINVAL;
361 goto err_out_dma_unmap;
362 }
363 n_elem_resp = dma_map_sg(dev, &task->smp_task.smp_resp,
364 1, DMA_FROM_DEVICE);
365 if (!n_elem_resp) {
366 rc = -ENOMEM;
367 goto err_out_dma_unmap;
368 }
369 resp_len = sg_dma_len(&task->smp_task.smp_resp);
370 if (resp_len & 0x3) {
371 rc = -EINVAL;
372 goto err_out_dma_unmap;
373 }
374 }
375 } else
376 n_elem = task->num_scatter;
377
378 if (n_elem > HISI_SAS_SGE_PAGE_CNT) {
379 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT",
380 n_elem);
381 rc = -EINVAL;
382 goto err_out_dma_unmap;
383 }
384
385 spin_lock_irqsave(&hisi_hba->lock, flags);
386 if (hisi_hba->hw->slot_index_alloc)
387 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
388 device);
389 else
390 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
391 spin_unlock_irqrestore(&hisi_hba->lock, flags);
392 if (rc)
393 goto err_out_dma_unmap;
394
395 slot = &hisi_hba->slot_info[slot_idx];
396
397 spin_lock_irqsave(&dq->lock, flags);
398 wr_q_index = hisi_hba->hw->get_free_slot(hisi_hba, dq);
399 if (wr_q_index < 0) {
400 spin_unlock_irqrestore(&dq->lock, flags);
401 rc = -EAGAIN;
402 goto err_out_tag;
403 }
404
405 list_add_tail(&slot->delivery, &dq->list);
406 list_add_tail(&slot->entry, &sas_dev->list);
407 spin_unlock_irqrestore(&dq->lock, flags);
408
409 dlvry_queue = dq->id;
410 dlvry_queue_slot = wr_q_index;
411
412 slot->n_elem = n_elem;
413 slot->dlvry_queue = dlvry_queue;
414 slot->dlvry_queue_slot = dlvry_queue_slot;
415 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
416 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
417 slot->task = task;
418 slot->port = port;
419 slot->tmf = tmf;
420 slot->is_internal = is_tmf;
421 task->lldd_task = slot;
422
423 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
424 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
425 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
426
427 switch (task->task_proto) {
428 case SAS_PROTOCOL_SMP:
429 hisi_sas_task_prep_smp(hisi_hba, slot);
430 break;
431 case SAS_PROTOCOL_SSP:
432 hisi_sas_task_prep_ssp(hisi_hba, slot);
433 break;
434 case SAS_PROTOCOL_SATA:
435 case SAS_PROTOCOL_STP:
436 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
437 hisi_sas_task_prep_ata(hisi_hba, slot);
438 break;
439 default:
440 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
441 task->task_proto);
442 break;
443 }
444
445 spin_lock_irqsave(&task->task_state_lock, flags);
446 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
447 spin_unlock_irqrestore(&task->task_state_lock, flags);
448
449 ++(*pass);
450 WRITE_ONCE(slot->ready, 1);
451
452 return 0;
453
454 err_out_tag:
455 spin_lock_irqsave(&hisi_hba->lock, flags);
456 hisi_sas_slot_index_free(hisi_hba, slot_idx);
457 spin_unlock_irqrestore(&hisi_hba->lock, flags);
458 err_out_dma_unmap:
459 if (!sas_protocol_ata(task->task_proto)) {
460 if (task->num_scatter) {
461 dma_unmap_sg(dev, task->scatter, task->num_scatter,
462 task->data_dir);
463 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
464 if (n_elem_req)
465 dma_unmap_sg(dev, &task->smp_task.smp_req,
466 1, DMA_TO_DEVICE);
467 if (n_elem_resp)
468 dma_unmap_sg(dev, &task->smp_task.smp_resp,
469 1, DMA_FROM_DEVICE);
470 }
471 }
472 prep_out:
473 dev_err(dev, "task prep: failed[%d]!\n", rc);
474 return rc;
475 }
476
477 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
478 bool is_tmf, struct hisi_sas_tmf_task *tmf)
479 {
480 u32 rc;
481 u32 pass = 0;
482 unsigned long flags;
483 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
484 struct device *dev = hisi_hba->dev;
485 struct hisi_sas_dq *dq = NULL;
486
487 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
488 /*
489 * For IOs from upper layer, it may already disable preempt
490 * in the IO path, if disable preempt again in down(),
491 * function schedule() will report schedule_bug(), so check
492 * preemptible() before goto down().
493 */
494 if (!preemptible())
495 return -EINVAL;
496
497 down(&hisi_hba->sem);
498 up(&hisi_hba->sem);
499 }
500
501 /* protect task_prep and start_delivery sequence */
502 rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf, &pass);
503 if (rc)
504 dev_err(dev, "task exec: failed[%d]!\n", rc);
505
506 if (likely(pass)) {
507 spin_lock_irqsave(&dq->lock, flags);
508 hisi_hba->hw->start_delivery(dq);
509 spin_unlock_irqrestore(&dq->lock, flags);
510 }
511
512 return rc;
513 }
514
515 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
516 {
517 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
518 struct asd_sas_phy *sas_phy = &phy->sas_phy;
519 struct sas_ha_struct *sas_ha;
520
521 if (!phy->phy_attached)
522 return;
523
524 sas_ha = &hisi_hba->sha;
525 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
526
527 if (sas_phy->phy) {
528 struct sas_phy *sphy = sas_phy->phy;
529
530 sphy->negotiated_linkrate = sas_phy->linkrate;
531 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
532 sphy->maximum_linkrate_hw =
533 hisi_hba->hw->phy_get_max_linkrate();
534 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
535 sphy->minimum_linkrate = phy->minimum_linkrate;
536
537 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
538 sphy->maximum_linkrate = phy->maximum_linkrate;
539 }
540
541 if (phy->phy_type & PORT_TYPE_SAS) {
542 struct sas_identify_frame *id;
543
544 id = (struct sas_identify_frame *)phy->frame_rcvd;
545 id->dev_type = phy->identify.device_type;
546 id->initiator_bits = SAS_PROTOCOL_ALL;
547 id->target_bits = phy->identify.target_port_protocols;
548 } else if (phy->phy_type & PORT_TYPE_SATA) {
549 /*Nothing*/
550 }
551
552 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
553 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
554 }
555
556 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
557 {
558 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
559 struct hisi_sas_device *sas_dev = NULL;
560 unsigned long flags;
561 int last = hisi_hba->last_dev_id;
562 int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
563 int i;
564
565 spin_lock_irqsave(&hisi_hba->lock, flags);
566 for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
567 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
568 int queue = i % hisi_hba->queue_count;
569 struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
570
571 hisi_hba->devices[i].device_id = i;
572 sas_dev = &hisi_hba->devices[i];
573 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
574 sas_dev->dev_type = device->dev_type;
575 sas_dev->hisi_hba = hisi_hba;
576 sas_dev->sas_device = device;
577 sas_dev->dq = dq;
578 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
579 break;
580 }
581 i++;
582 }
583 hisi_hba->last_dev_id = i;
584 spin_unlock_irqrestore(&hisi_hba->lock, flags);
585
586 return sas_dev;
587 }
588
589 #define HISI_SAS_SRST_ATA_DISK_CNT 3
590 static int hisi_sas_init_device(struct domain_device *device)
591 {
592 int rc = TMF_RESP_FUNC_COMPLETE;
593 struct scsi_lun lun;
594 struct hisi_sas_tmf_task tmf_task;
595 int retry = HISI_SAS_SRST_ATA_DISK_CNT;
596 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
597
598 switch (device->dev_type) {
599 case SAS_END_DEVICE:
600 int_to_scsilun(0, &lun);
601
602 tmf_task.tmf = TMF_CLEAR_TASK_SET;
603 rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
604 &tmf_task);
605 if (rc == TMF_RESP_FUNC_COMPLETE)
606 hisi_sas_release_task(hisi_hba, device);
607 break;
608 case SAS_SATA_DEV:
609 case SAS_SATA_PM:
610 case SAS_SATA_PM_PORT:
611 case SAS_SATA_PENDING:
612 while (retry-- > 0) {
613 rc = hisi_sas_softreset_ata_disk(device);
614 if (!rc)
615 break;
616 }
617 break;
618 default:
619 break;
620 }
621
622 return rc;
623 }
624
625 static int hisi_sas_dev_found(struct domain_device *device)
626 {
627 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
628 struct domain_device *parent_dev = device->parent;
629 struct hisi_sas_device *sas_dev;
630 struct device *dev = hisi_hba->dev;
631 int rc;
632
633 if (hisi_hba->hw->alloc_dev)
634 sas_dev = hisi_hba->hw->alloc_dev(device);
635 else
636 sas_dev = hisi_sas_alloc_dev(device);
637 if (!sas_dev) {
638 dev_err(dev, "fail alloc dev: max support %d devices\n",
639 HISI_SAS_MAX_DEVICES);
640 return -EINVAL;
641 }
642
643 device->lldd_dev = sas_dev;
644 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
645
646 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
647 int phy_no;
648 u8 phy_num = parent_dev->ex_dev.num_phys;
649 struct ex_phy *phy;
650
651 for (phy_no = 0; phy_no < phy_num; phy_no++) {
652 phy = &parent_dev->ex_dev.ex_phy[phy_no];
653 if (SAS_ADDR(phy->attached_sas_addr) ==
654 SAS_ADDR(device->sas_addr))
655 break;
656 }
657
658 if (phy_no == phy_num) {
659 dev_info(dev, "dev found: no attached "
660 "dev:%016llx at ex:%016llx\n",
661 SAS_ADDR(device->sas_addr),
662 SAS_ADDR(parent_dev->sas_addr));
663 rc = -EINVAL;
664 goto err_out;
665 }
666 }
667
668 dev_info(dev, "dev[%d:%x] found\n",
669 sas_dev->device_id, sas_dev->dev_type);
670
671 rc = hisi_sas_init_device(device);
672 if (rc)
673 goto err_out;
674 return 0;
675
676 err_out:
677 hisi_sas_dev_gone(device);
678 return rc;
679 }
680
681 int hisi_sas_slave_configure(struct scsi_device *sdev)
682 {
683 struct domain_device *dev = sdev_to_domain_dev(sdev);
684 int ret = sas_slave_configure(sdev);
685
686 if (ret)
687 return ret;
688 if (!dev_is_sata(dev))
689 sas_change_queue_depth(sdev, 64);
690
691 return 0;
692 }
693 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
694
695 void hisi_sas_scan_start(struct Scsi_Host *shost)
696 {
697 struct hisi_hba *hisi_hba = shost_priv(shost);
698
699 hisi_hba->hw->phys_init(hisi_hba);
700 }
701 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
702
703 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
704 {
705 struct hisi_hba *hisi_hba = shost_priv(shost);
706 struct sas_ha_struct *sha = &hisi_hba->sha;
707
708 /* Wait for PHY up interrupt to occur */
709 if (time < HZ)
710 return 0;
711
712 sas_drain_work(sha);
713 return 1;
714 }
715 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
716
717 static void hisi_sas_phyup_work(struct work_struct *work)
718 {
719 struct hisi_sas_phy *phy =
720 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
721 struct hisi_hba *hisi_hba = phy->hisi_hba;
722 struct asd_sas_phy *sas_phy = &phy->sas_phy;
723 int phy_no = sas_phy->id;
724
725 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
726 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
727 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
728 }
729
730 static void hisi_sas_linkreset_work(struct work_struct *work)
731 {
732 struct hisi_sas_phy *phy =
733 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
734 struct asd_sas_phy *sas_phy = &phy->sas_phy;
735
736 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
737 }
738
739 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
740 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
741 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
742 };
743
744 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
745 enum hisi_sas_phy_event event)
746 {
747 struct hisi_hba *hisi_hba = phy->hisi_hba;
748
749 if (WARN_ON(event >= HISI_PHYES_NUM))
750 return false;
751
752 return queue_work(hisi_hba->wq, &phy->works[event]);
753 }
754 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
755
756 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
757 {
758 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
759 struct asd_sas_phy *sas_phy = &phy->sas_phy;
760 int i;
761
762 phy->hisi_hba = hisi_hba;
763 phy->port = NULL;
764 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
765 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
766 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
767 sas_phy->class = SAS;
768 sas_phy->iproto = SAS_PROTOCOL_ALL;
769 sas_phy->tproto = 0;
770 sas_phy->type = PHY_TYPE_PHYSICAL;
771 sas_phy->role = PHY_ROLE_INITIATOR;
772 sas_phy->oob_mode = OOB_NOT_CONNECTED;
773 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
774 sas_phy->id = phy_no;
775 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
776 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
777 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
778 sas_phy->lldd_phy = phy;
779
780 for (i = 0; i < HISI_PHYES_NUM; i++)
781 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
782
783 spin_lock_init(&phy->lock);
784 }
785
786 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
787 {
788 struct sas_ha_struct *sas_ha = sas_phy->ha;
789 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
790 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
791 struct asd_sas_port *sas_port = sas_phy->port;
792 struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
793 unsigned long flags;
794
795 if (!sas_port)
796 return;
797
798 spin_lock_irqsave(&hisi_hba->lock, flags);
799 port->port_attached = 1;
800 port->id = phy->port_id;
801 phy->port = port;
802 sas_port->lldd_port = port;
803 spin_unlock_irqrestore(&hisi_hba->lock, flags);
804 }
805
806 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
807 struct hisi_sas_slot *slot)
808 {
809 if (task) {
810 unsigned long flags;
811 struct task_status_struct *ts;
812
813 ts = &task->task_status;
814
815 ts->resp = SAS_TASK_COMPLETE;
816 ts->stat = SAS_ABORTED_TASK;
817 spin_lock_irqsave(&task->task_state_lock, flags);
818 task->task_state_flags &=
819 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
820 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
821 task->task_state_flags |= SAS_TASK_STATE_DONE;
822 spin_unlock_irqrestore(&task->task_state_lock, flags);
823 }
824
825 hisi_sas_slot_task_free(hisi_hba, task, slot);
826 }
827
828 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
829 struct domain_device *device)
830 {
831 struct hisi_sas_slot *slot, *slot2;
832 struct hisi_sas_device *sas_dev = device->lldd_dev;
833
834 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
835 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
836 }
837
838 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
839 {
840 struct hisi_sas_device *sas_dev;
841 struct domain_device *device;
842 int i;
843
844 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
845 sas_dev = &hisi_hba->devices[i];
846 device = sas_dev->sas_device;
847
848 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
849 !device)
850 continue;
851
852 hisi_sas_release_task(hisi_hba, device);
853 }
854 }
855 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
856
857 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
858 struct domain_device *device)
859 {
860 if (hisi_hba->hw->dereg_device)
861 hisi_hba->hw->dereg_device(hisi_hba, device);
862 }
863
864 static void hisi_sas_dev_gone(struct domain_device *device)
865 {
866 struct hisi_sas_device *sas_dev = device->lldd_dev;
867 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
868 struct device *dev = hisi_hba->dev;
869
870 dev_info(dev, "dev[%d:%x] is gone\n",
871 sas_dev->device_id, sas_dev->dev_type);
872
873 if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
874 hisi_sas_internal_task_abort(hisi_hba, device,
875 HISI_SAS_INT_ABT_DEV, 0);
876
877 hisi_sas_dereg_device(hisi_hba, device);
878
879 down(&hisi_hba->sem);
880 hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
881 up(&hisi_hba->sem);
882 device->lldd_dev = NULL;
883 }
884
885 if (hisi_hba->hw->free_device)
886 hisi_hba->hw->free_device(sas_dev);
887 sas_dev->dev_type = SAS_PHY_UNUSED;
888 }
889
890 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
891 {
892 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
893 }
894
895 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
896 struct sas_phy_linkrates *r)
897 {
898 struct sas_phy_linkrates _r;
899
900 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
901 struct asd_sas_phy *sas_phy = &phy->sas_phy;
902 enum sas_linkrate min, max;
903
904 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
905 return -EINVAL;
906
907 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
908 max = sas_phy->phy->maximum_linkrate;
909 min = r->minimum_linkrate;
910 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
911 max = r->maximum_linkrate;
912 min = sas_phy->phy->minimum_linkrate;
913 } else
914 return -EINVAL;
915
916 _r.maximum_linkrate = max;
917 _r.minimum_linkrate = min;
918
919 sas_phy->phy->maximum_linkrate = max;
920 sas_phy->phy->minimum_linkrate = min;
921
922 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
923 msleep(100);
924 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
925 hisi_hba->hw->phy_start(hisi_hba, phy_no);
926
927 return 0;
928 }
929
930 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
931 void *funcdata)
932 {
933 struct sas_ha_struct *sas_ha = sas_phy->ha;
934 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
935 int phy_no = sas_phy->id;
936
937 switch (func) {
938 case PHY_FUNC_HARD_RESET:
939 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
940 break;
941
942 case PHY_FUNC_LINK_RESET:
943 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
944 msleep(100);
945 hisi_hba->hw->phy_start(hisi_hba, phy_no);
946 break;
947
948 case PHY_FUNC_DISABLE:
949 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
950 break;
951
952 case PHY_FUNC_SET_LINK_RATE:
953 return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
954 case PHY_FUNC_GET_EVENTS:
955 if (hisi_hba->hw->get_events) {
956 hisi_hba->hw->get_events(hisi_hba, phy_no);
957 break;
958 }
959 /* fallthru */
960 case PHY_FUNC_RELEASE_SPINUP_HOLD:
961 default:
962 return -EOPNOTSUPP;
963 }
964 return 0;
965 }
966
967 static void hisi_sas_task_done(struct sas_task *task)
968 {
969 del_timer(&task->slow_task->timer);
970 complete(&task->slow_task->completion);
971 }
972
973 static void hisi_sas_tmf_timedout(struct timer_list *t)
974 {
975 struct sas_task_slow *slow = from_timer(slow, t, timer);
976 struct sas_task *task = slow->task;
977 unsigned long flags;
978 bool is_completed = true;
979
980 spin_lock_irqsave(&task->task_state_lock, flags);
981 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
982 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
983 is_completed = false;
984 }
985 spin_unlock_irqrestore(&task->task_state_lock, flags);
986
987 if (!is_completed)
988 complete(&task->slow_task->completion);
989 }
990
991 #define TASK_TIMEOUT 20
992 #define TASK_RETRY 3
993 #define INTERNAL_ABORT_TIMEOUT 6
994 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
995 void *parameter, u32 para_len,
996 struct hisi_sas_tmf_task *tmf)
997 {
998 struct hisi_sas_device *sas_dev = device->lldd_dev;
999 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1000 struct device *dev = hisi_hba->dev;
1001 struct sas_task *task;
1002 int res, retry;
1003
1004 for (retry = 0; retry < TASK_RETRY; retry++) {
1005 task = sas_alloc_slow_task(GFP_KERNEL);
1006 if (!task)
1007 return -ENOMEM;
1008
1009 task->dev = device;
1010 task->task_proto = device->tproto;
1011
1012 if (dev_is_sata(device)) {
1013 task->ata_task.device_control_reg_update = 1;
1014 memcpy(&task->ata_task.fis, parameter, para_len);
1015 } else {
1016 memcpy(&task->ssp_task, parameter, para_len);
1017 }
1018 task->task_done = hisi_sas_task_done;
1019
1020 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1021 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
1022 add_timer(&task->slow_task->timer);
1023
1024 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
1025
1026 if (res) {
1027 del_timer(&task->slow_task->timer);
1028 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
1029 res);
1030 goto ex_err;
1031 }
1032
1033 wait_for_completion(&task->slow_task->completion);
1034 res = TMF_RESP_FUNC_FAILED;
1035 /* Even TMF timed out, return direct. */
1036 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1037 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1038 struct hisi_sas_slot *slot = task->lldd_task;
1039
1040 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1041 if (slot) {
1042 struct hisi_sas_cq *cq =
1043 &hisi_hba->cq[slot->dlvry_queue];
1044 /*
1045 * flush tasklet to avoid free'ing task
1046 * before using task in IO completion
1047 */
1048 tasklet_kill(&cq->tasklet);
1049 slot->task = NULL;
1050 }
1051
1052 goto ex_err;
1053 } else
1054 dev_err(dev, "abort tmf: TMF task timeout\n");
1055 }
1056
1057 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1058 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1059 res = TMF_RESP_FUNC_COMPLETE;
1060 break;
1061 }
1062
1063 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1064 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1065 res = TMF_RESP_FUNC_SUCC;
1066 break;
1067 }
1068
1069 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1070 task->task_status.stat == SAS_DATA_UNDERRUN) {
1071 /* no error, but return the number of bytes of
1072 * underrun
1073 */
1074 dev_warn(dev, "abort tmf: task to dev %016llx "
1075 "resp: 0x%x sts 0x%x underrun\n",
1076 SAS_ADDR(device->sas_addr),
1077 task->task_status.resp,
1078 task->task_status.stat);
1079 res = task->task_status.residual;
1080 break;
1081 }
1082
1083 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1084 task->task_status.stat == SAS_DATA_OVERRUN) {
1085 dev_warn(dev, "abort tmf: blocked task error\n");
1086 res = -EMSGSIZE;
1087 break;
1088 }
1089
1090 dev_warn(dev, "abort tmf: task to dev "
1091 "%016llx resp: 0x%x status 0x%x\n",
1092 SAS_ADDR(device->sas_addr), task->task_status.resp,
1093 task->task_status.stat);
1094 sas_free_task(task);
1095 task = NULL;
1096 }
1097 ex_err:
1098 if (retry == TASK_RETRY)
1099 dev_warn(dev, "abort tmf: executing internal task failed!\n");
1100 sas_free_task(task);
1101 return res;
1102 }
1103
1104 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1105 bool reset, int pmp, u8 *fis)
1106 {
1107 struct ata_taskfile tf;
1108
1109 ata_tf_init(dev, &tf);
1110 if (reset)
1111 tf.ctl |= ATA_SRST;
1112 else
1113 tf.ctl &= ~ATA_SRST;
1114 tf.command = ATA_CMD_DEV_RESET;
1115 ata_tf_to_fis(&tf, pmp, 0, fis);
1116 }
1117
1118 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1119 {
1120 u8 fis[20] = {0};
1121 struct ata_port *ap = device->sata_dev.ap;
1122 struct ata_link *link;
1123 int rc = TMF_RESP_FUNC_FAILED;
1124 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1125 struct device *dev = hisi_hba->dev;
1126 int s = sizeof(struct host_to_dev_fis);
1127
1128 ata_for_each_link(link, ap, EDGE) {
1129 int pmp = sata_srst_pmp(link);
1130
1131 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1132 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1133 if (rc != TMF_RESP_FUNC_COMPLETE)
1134 break;
1135 }
1136
1137 if (rc == TMF_RESP_FUNC_COMPLETE) {
1138 ata_for_each_link(link, ap, EDGE) {
1139 int pmp = sata_srst_pmp(link);
1140
1141 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1142 rc = hisi_sas_exec_internal_tmf_task(device, fis,
1143 s, NULL);
1144 if (rc != TMF_RESP_FUNC_COMPLETE)
1145 dev_err(dev, "ata disk de-reset failed\n");
1146 }
1147 } else {
1148 dev_err(dev, "ata disk reset failed\n");
1149 }
1150
1151 if (rc == TMF_RESP_FUNC_COMPLETE)
1152 hisi_sas_release_task(hisi_hba, device);
1153
1154 return rc;
1155 }
1156
1157 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1158 u8 *lun, struct hisi_sas_tmf_task *tmf)
1159 {
1160 struct sas_ssp_task ssp_task;
1161
1162 if (!(device->tproto & SAS_PROTOCOL_SSP))
1163 return TMF_RESP_FUNC_ESUPP;
1164
1165 memcpy(ssp_task.LUN, lun, 8);
1166
1167 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1168 sizeof(ssp_task), tmf);
1169 }
1170
1171 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1172 {
1173 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1174 int i;
1175
1176 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1177 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1178 struct domain_device *device = sas_dev->sas_device;
1179 struct asd_sas_port *sas_port;
1180 struct hisi_sas_port *port;
1181 struct hisi_sas_phy *phy = NULL;
1182 struct asd_sas_phy *sas_phy;
1183
1184 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1185 || !device || !device->port)
1186 continue;
1187
1188 sas_port = device->port;
1189 port = to_hisi_sas_port(sas_port);
1190
1191 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1192 if (state & BIT(sas_phy->id)) {
1193 phy = sas_phy->lldd_phy;
1194 break;
1195 }
1196
1197 if (phy) {
1198 port->id = phy->port_id;
1199
1200 /* Update linkrate of directly attached device. */
1201 if (!device->parent)
1202 device->linkrate = phy->sas_phy.linkrate;
1203
1204 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1205 } else
1206 port->id = 0xff;
1207 }
1208 }
1209
1210 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1211 u32 state)
1212 {
1213 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1214 struct asd_sas_port *_sas_port = NULL;
1215 int phy_no;
1216
1217 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1218 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1219 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1220 struct asd_sas_port *sas_port = sas_phy->port;
1221 bool do_port_check = !!(_sas_port != sas_port);
1222
1223 if (!sas_phy->phy->enabled)
1224 continue;
1225
1226 /* Report PHY state change to libsas */
1227 if (state & BIT(phy_no)) {
1228 if (do_port_check && sas_port && sas_port->port_dev) {
1229 struct domain_device *dev = sas_port->port_dev;
1230
1231 _sas_port = sas_port;
1232
1233 if (DEV_IS_EXPANDER(dev->dev_type))
1234 sas_ha->notify_port_event(sas_phy,
1235 PORTE_BROADCAST_RCVD);
1236 }
1237 } else if (old_state & (1 << phy_no))
1238 /* PHY down but was up before */
1239 hisi_sas_phy_down(hisi_hba, phy_no, 0);
1240
1241 }
1242 }
1243
1244 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1245 {
1246 struct hisi_sas_device *sas_dev;
1247 struct domain_device *device;
1248 int i;
1249
1250 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1251 sas_dev = &hisi_hba->devices[i];
1252 device = sas_dev->sas_device;
1253
1254 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1255 continue;
1256
1257 hisi_sas_init_device(device);
1258 }
1259 }
1260
1261 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1262 struct asd_sas_port *sas_port,
1263 struct domain_device *device)
1264 {
1265 struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
1266 struct ata_port *ap = device->sata_dev.ap;
1267 struct device *dev = hisi_hba->dev;
1268 int s = sizeof(struct host_to_dev_fis);
1269 int rc = TMF_RESP_FUNC_FAILED;
1270 struct asd_sas_phy *sas_phy;
1271 struct ata_link *link;
1272 u8 fis[20] = {0};
1273 u32 state;
1274
1275 state = hisi_hba->hw->get_phys_state(hisi_hba);
1276 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) {
1277 if (!(state & BIT(sas_phy->id)))
1278 continue;
1279
1280 ata_for_each_link(link, ap, EDGE) {
1281 int pmp = sata_srst_pmp(link);
1282
1283 tmf_task.phy_id = sas_phy->id;
1284 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1285 rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
1286 &tmf_task);
1287 if (rc != TMF_RESP_FUNC_COMPLETE) {
1288 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1289 sas_phy->id, rc);
1290 break;
1291 }
1292 }
1293 }
1294 }
1295
1296 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1297 {
1298 struct device *dev = hisi_hba->dev;
1299 int port_no, rc, i;
1300
1301 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1302 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1303 struct domain_device *device = sas_dev->sas_device;
1304
1305 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1306 continue;
1307
1308 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1309 HISI_SAS_INT_ABT_DEV, 0);
1310 if (rc < 0)
1311 dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1312 }
1313
1314 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1315 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1316 struct asd_sas_port *sas_port = &port->sas_port;
1317 struct domain_device *port_dev = sas_port->port_dev;
1318 struct domain_device *device;
1319
1320 if (!port_dev || !DEV_IS_EXPANDER(port_dev->dev_type))
1321 continue;
1322
1323 /* Try to find a SATA device */
1324 list_for_each_entry(device, &sas_port->dev_list,
1325 dev_list_node) {
1326 if (dev_is_sata(device)) {
1327 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1328 sas_port,
1329 device);
1330 break;
1331 }
1332 }
1333 }
1334 }
1335
1336 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1337 {
1338 struct Scsi_Host *shost = hisi_hba->shost;
1339
1340 down(&hisi_hba->sem);
1341 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1342
1343 scsi_block_requests(shost);
1344 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1345
1346 if (timer_pending(&hisi_hba->timer))
1347 del_timer_sync(&hisi_hba->timer);
1348
1349 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1350 }
1351 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1352
1353 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1354 {
1355 struct Scsi_Host *shost = hisi_hba->shost;
1356 u32 state;
1357
1358 /* Init and wait for PHYs to come up and all libsas event finished. */
1359 hisi_hba->hw->phys_init(hisi_hba);
1360 msleep(1000);
1361 hisi_sas_refresh_port_id(hisi_hba);
1362 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1363 up(&hisi_hba->sem);
1364
1365 if (hisi_hba->reject_stp_links_msk)
1366 hisi_sas_terminate_stp_reject(hisi_hba);
1367 hisi_sas_reset_init_all_devices(hisi_hba);
1368 scsi_unblock_requests(shost);
1369 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1370
1371 state = hisi_hba->hw->get_phys_state(hisi_hba);
1372 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state, state);
1373 }
1374 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1375
1376 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1377 {
1378 struct device *dev = hisi_hba->dev;
1379 struct Scsi_Host *shost = hisi_hba->shost;
1380 int rc;
1381
1382 if (!hisi_hba->hw->soft_reset)
1383 return -1;
1384
1385 if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1386 return -1;
1387
1388 dev_info(dev, "controller resetting...\n");
1389 hisi_sas_controller_reset_prepare(hisi_hba);
1390
1391 rc = hisi_hba->hw->soft_reset(hisi_hba);
1392 if (rc) {
1393 dev_warn(dev, "controller reset failed (%d)\n", rc);
1394 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1395 up(&hisi_hba->sem);
1396 scsi_unblock_requests(shost);
1397 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1398 return rc;
1399 }
1400
1401 hisi_sas_controller_reset_done(hisi_hba);
1402 dev_info(dev, "controller reset complete\n");
1403
1404 return 0;
1405 }
1406
1407 static int hisi_sas_abort_task(struct sas_task *task)
1408 {
1409 struct scsi_lun lun;
1410 struct hisi_sas_tmf_task tmf_task;
1411 struct domain_device *device = task->dev;
1412 struct hisi_sas_device *sas_dev = device->lldd_dev;
1413 struct hisi_hba *hisi_hba;
1414 struct device *dev;
1415 int rc = TMF_RESP_FUNC_FAILED;
1416 unsigned long flags;
1417
1418 if (!sas_dev)
1419 return TMF_RESP_FUNC_FAILED;
1420
1421 hisi_hba = dev_to_hisi_hba(task->dev);
1422 dev = hisi_hba->dev;
1423
1424 spin_lock_irqsave(&task->task_state_lock, flags);
1425 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1426 struct hisi_sas_slot *slot = task->lldd_task;
1427 struct hisi_sas_cq *cq;
1428
1429 if (slot) {
1430 /*
1431 * flush tasklet to avoid free'ing task
1432 * before using task in IO completion
1433 */
1434 cq = &hisi_hba->cq[slot->dlvry_queue];
1435 tasklet_kill(&cq->tasklet);
1436 }
1437 spin_unlock_irqrestore(&task->task_state_lock, flags);
1438 rc = TMF_RESP_FUNC_COMPLETE;
1439 goto out;
1440 }
1441 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1442 spin_unlock_irqrestore(&task->task_state_lock, flags);
1443
1444 sas_dev->dev_status = HISI_SAS_DEV_EH;
1445 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1446 struct scsi_cmnd *cmnd = task->uldd_task;
1447 struct hisi_sas_slot *slot = task->lldd_task;
1448 u32 tag = slot->idx;
1449 int rc2;
1450
1451 int_to_scsilun(cmnd->device->lun, &lun);
1452 tmf_task.tmf = TMF_ABORT_TASK;
1453 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1454
1455 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1456 &tmf_task);
1457
1458 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1459 HISI_SAS_INT_ABT_CMD, tag);
1460 if (rc2 < 0) {
1461 dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1462 return TMF_RESP_FUNC_FAILED;
1463 }
1464
1465 /*
1466 * If the TMF finds that the IO is not in the device and also
1467 * the internal abort does not succeed, then it is safe to
1468 * free the slot.
1469 * Note: if the internal abort succeeds then the slot
1470 * will have already been completed
1471 */
1472 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1473 if (task->lldd_task)
1474 hisi_sas_do_release_task(hisi_hba, task, slot);
1475 }
1476 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1477 task->task_proto & SAS_PROTOCOL_STP) {
1478 if (task->dev->dev_type == SAS_SATA_DEV) {
1479 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1480 HISI_SAS_INT_ABT_DEV, 0);
1481 if (rc < 0) {
1482 dev_err(dev, "abort task: internal abort failed\n");
1483 goto out;
1484 }
1485 hisi_sas_dereg_device(hisi_hba, device);
1486 rc = hisi_sas_softreset_ata_disk(device);
1487 }
1488 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1489 /* SMP */
1490 struct hisi_sas_slot *slot = task->lldd_task;
1491 u32 tag = slot->idx;
1492 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1493
1494 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1495 HISI_SAS_INT_ABT_CMD, tag);
1496 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1497 task->lldd_task) {
1498 /*
1499 * flush tasklet to avoid free'ing task
1500 * before using task in IO completion
1501 */
1502 tasklet_kill(&cq->tasklet);
1503 slot->task = NULL;
1504 }
1505 }
1506
1507 out:
1508 if (rc != TMF_RESP_FUNC_COMPLETE)
1509 dev_notice(dev, "abort task: rc=%d\n", rc);
1510 return rc;
1511 }
1512
1513 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1514 {
1515 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1516 struct device *dev = hisi_hba->dev;
1517 struct hisi_sas_tmf_task tmf_task;
1518 int rc = TMF_RESP_FUNC_FAILED;
1519
1520 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1521 HISI_SAS_INT_ABT_DEV, 0);
1522 if (rc < 0) {
1523 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1524 return TMF_RESP_FUNC_FAILED;
1525 }
1526 hisi_sas_dereg_device(hisi_hba, device);
1527
1528 tmf_task.tmf = TMF_ABORT_TASK_SET;
1529 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1530
1531 if (rc == TMF_RESP_FUNC_COMPLETE)
1532 hisi_sas_release_task(hisi_hba, device);
1533
1534 return rc;
1535 }
1536
1537 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1538 {
1539 int rc = TMF_RESP_FUNC_FAILED;
1540 struct hisi_sas_tmf_task tmf_task;
1541
1542 tmf_task.tmf = TMF_CLEAR_ACA;
1543 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1544
1545 return rc;
1546 }
1547
1548 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1549 {
1550 struct sas_phy *local_phy = sas_get_local_phy(device);
1551 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1552 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1553 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1554 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1555 struct asd_sas_phy *sas_phy = sas_ha->sas_phy[local_phy->number];
1556 struct hisi_sas_phy *phy = container_of(sas_phy,
1557 struct hisi_sas_phy, sas_phy);
1558 DECLARE_COMPLETION_ONSTACK(phyreset);
1559
1560 if (scsi_is_sas_phy_local(local_phy)) {
1561 phy->in_reset = 1;
1562 phy->reset_completion = &phyreset;
1563 }
1564
1565 rc = sas_phy_reset(local_phy, reset_type);
1566 sas_put_local_phy(local_phy);
1567
1568 if (scsi_is_sas_phy_local(local_phy)) {
1569 int ret = wait_for_completion_timeout(&phyreset, 2 * HZ);
1570 unsigned long flags;
1571
1572 spin_lock_irqsave(&phy->lock, flags);
1573 phy->reset_completion = NULL;
1574 phy->in_reset = 0;
1575 spin_unlock_irqrestore(&phy->lock, flags);
1576
1577 /* report PHY down if timed out */
1578 if (!ret)
1579 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0);
1580 } else
1581 msleep(2000);
1582
1583 return rc;
1584 }
1585
1586 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1587 {
1588 struct hisi_sas_device *sas_dev = device->lldd_dev;
1589 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1590 struct device *dev = hisi_hba->dev;
1591 int rc = TMF_RESP_FUNC_FAILED;
1592
1593 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
1594 return TMF_RESP_FUNC_FAILED;
1595 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1596
1597 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1598 HISI_SAS_INT_ABT_DEV, 0);
1599 if (rc < 0) {
1600 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1601 return TMF_RESP_FUNC_FAILED;
1602 }
1603 hisi_sas_dereg_device(hisi_hba, device);
1604
1605 rc = hisi_sas_debug_I_T_nexus_reset(device);
1606
1607 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1608 hisi_sas_release_task(hisi_hba, device);
1609
1610 return rc;
1611 }
1612
1613 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1614 {
1615 struct hisi_sas_device *sas_dev = device->lldd_dev;
1616 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1617 struct device *dev = hisi_hba->dev;
1618 int rc = TMF_RESP_FUNC_FAILED;
1619
1620 sas_dev->dev_status = HISI_SAS_DEV_EH;
1621 if (dev_is_sata(device)) {
1622 struct sas_phy *phy;
1623
1624 /* Clear internal IO and then hardreset */
1625 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1626 HISI_SAS_INT_ABT_DEV, 0);
1627 if (rc < 0) {
1628 dev_err(dev, "lu_reset: internal abort failed\n");
1629 goto out;
1630 }
1631 hisi_sas_dereg_device(hisi_hba, device);
1632
1633 phy = sas_get_local_phy(device);
1634
1635 rc = sas_phy_reset(phy, 1);
1636
1637 if (rc == 0)
1638 hisi_sas_release_task(hisi_hba, device);
1639 sas_put_local_phy(phy);
1640 } else {
1641 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1642
1643 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1644 HISI_SAS_INT_ABT_DEV, 0);
1645 if (rc < 0) {
1646 dev_err(dev, "lu_reset: internal abort failed\n");
1647 goto out;
1648 }
1649 hisi_sas_dereg_device(hisi_hba, device);
1650
1651 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1652 if (rc == TMF_RESP_FUNC_COMPLETE)
1653 hisi_sas_release_task(hisi_hba, device);
1654 }
1655 out:
1656 if (rc != TMF_RESP_FUNC_COMPLETE)
1657 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1658 sas_dev->device_id, rc);
1659 return rc;
1660 }
1661
1662 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1663 {
1664 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1665 struct device *dev = hisi_hba->dev;
1666 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1667 int rc, i;
1668
1669 queue_work(hisi_hba->wq, &r.work);
1670 wait_for_completion(r.completion);
1671 if (!r.done)
1672 return TMF_RESP_FUNC_FAILED;
1673
1674 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1675 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1676 struct domain_device *device = sas_dev->sas_device;
1677
1678 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1679 DEV_IS_EXPANDER(device->dev_type))
1680 continue;
1681
1682 rc = hisi_sas_debug_I_T_nexus_reset(device);
1683 if (rc != TMF_RESP_FUNC_COMPLETE)
1684 dev_info(dev, "clear nexus ha: for device[%d] rc=%d\n",
1685 sas_dev->device_id, rc);
1686 }
1687
1688 hisi_sas_release_tasks(hisi_hba);
1689
1690 return TMF_RESP_FUNC_COMPLETE;
1691 }
1692
1693 static int hisi_sas_query_task(struct sas_task *task)
1694 {
1695 struct scsi_lun lun;
1696 struct hisi_sas_tmf_task tmf_task;
1697 int rc = TMF_RESP_FUNC_FAILED;
1698
1699 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1700 struct scsi_cmnd *cmnd = task->uldd_task;
1701 struct domain_device *device = task->dev;
1702 struct hisi_sas_slot *slot = task->lldd_task;
1703 u32 tag = slot->idx;
1704
1705 int_to_scsilun(cmnd->device->lun, &lun);
1706 tmf_task.tmf = TMF_QUERY_TASK;
1707 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1708
1709 rc = hisi_sas_debug_issue_ssp_tmf(device,
1710 lun.scsi_lun,
1711 &tmf_task);
1712 switch (rc) {
1713 /* The task is still in Lun, release it then */
1714 case TMF_RESP_FUNC_SUCC:
1715 /* The task is not in Lun or failed, reset the phy */
1716 case TMF_RESP_FUNC_FAILED:
1717 case TMF_RESP_FUNC_COMPLETE:
1718 break;
1719 default:
1720 rc = TMF_RESP_FUNC_FAILED;
1721 break;
1722 }
1723 }
1724 return rc;
1725 }
1726
1727 static int
1728 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1729 struct sas_task *task, int abort_flag,
1730 int task_tag)
1731 {
1732 struct domain_device *device = task->dev;
1733 struct hisi_sas_device *sas_dev = device->lldd_dev;
1734 struct device *dev = hisi_hba->dev;
1735 struct hisi_sas_port *port;
1736 struct hisi_sas_slot *slot;
1737 struct asd_sas_port *sas_port = device->port;
1738 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1739 struct hisi_sas_dq *dq = sas_dev->dq;
1740 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1741 unsigned long flags, flags_dq = 0;
1742 int wr_q_index;
1743
1744 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1745 return -EINVAL;
1746
1747 if (!device->port)
1748 return -1;
1749
1750 port = to_hisi_sas_port(sas_port);
1751
1752 /* simply get a slot and send abort command */
1753 spin_lock_irqsave(&hisi_hba->lock, flags);
1754 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1755 if (rc) {
1756 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1757 goto err_out;
1758 }
1759 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1760
1761 slot = &hisi_hba->slot_info[slot_idx];
1762
1763 spin_lock_irqsave(&dq->lock, flags_dq);
1764 wr_q_index = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1765 if (wr_q_index < 0) {
1766 spin_unlock_irqrestore(&dq->lock, flags_dq);
1767 rc = -EAGAIN;
1768 goto err_out_tag;
1769 }
1770 list_add_tail(&slot->delivery, &dq->list);
1771 spin_unlock_irqrestore(&dq->lock, flags_dq);
1772
1773 dlvry_queue = dq->id;
1774 dlvry_queue_slot = wr_q_index;
1775
1776 slot->n_elem = n_elem;
1777 slot->dlvry_queue = dlvry_queue;
1778 slot->dlvry_queue_slot = dlvry_queue_slot;
1779 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1780 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1781 slot->task = task;
1782 slot->port = port;
1783 slot->is_internal = true;
1784 task->lldd_task = slot;
1785
1786 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1787 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1788 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
1789
1790 hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1791 abort_flag, task_tag);
1792
1793 spin_lock_irqsave(&task->task_state_lock, flags);
1794 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1795 spin_unlock_irqrestore(&task->task_state_lock, flags);
1796
1797 WRITE_ONCE(slot->ready, 1);
1798 /* send abort command to the chip */
1799 spin_lock_irqsave(&dq->lock, flags);
1800 list_add_tail(&slot->entry, &sas_dev->list);
1801 hisi_hba->hw->start_delivery(dq);
1802 spin_unlock_irqrestore(&dq->lock, flags);
1803
1804 return 0;
1805
1806 err_out_tag:
1807 spin_lock_irqsave(&hisi_hba->lock, flags);
1808 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1809 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1810 err_out:
1811 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1812
1813 return rc;
1814 }
1815
1816 /**
1817 * hisi_sas_internal_task_abort -- execute an internal
1818 * abort command for single IO command or a device
1819 * @hisi_hba: host controller struct
1820 * @device: domain device
1821 * @abort_flag: mode of operation, device or single IO
1822 * @tag: tag of IO to be aborted (only relevant to single
1823 * IO mode)
1824 */
1825 static int
1826 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1827 struct domain_device *device,
1828 int abort_flag, int tag)
1829 {
1830 struct sas_task *task;
1831 struct hisi_sas_device *sas_dev = device->lldd_dev;
1832 struct device *dev = hisi_hba->dev;
1833 int res;
1834
1835 /*
1836 * The interface is not realized means this HW don't support internal
1837 * abort, or don't need to do internal abort. Then here, we return
1838 * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
1839 * the internal abort has been executed and returned CQ.
1840 */
1841 if (!hisi_hba->hw->prep_abort)
1842 return TMF_RESP_FUNC_FAILED;
1843
1844 task = sas_alloc_slow_task(GFP_KERNEL);
1845 if (!task)
1846 return -ENOMEM;
1847
1848 task->dev = device;
1849 task->task_proto = device->tproto;
1850 task->task_done = hisi_sas_task_done;
1851 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1852 task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT*HZ;
1853 add_timer(&task->slow_task->timer);
1854
1855 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1856 task, abort_flag, tag);
1857 if (res) {
1858 del_timer(&task->slow_task->timer);
1859 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1860 res);
1861 goto exit;
1862 }
1863 wait_for_completion(&task->slow_task->completion);
1864 res = TMF_RESP_FUNC_FAILED;
1865
1866 /* Internal abort timed out */
1867 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1868 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1869 struct hisi_sas_slot *slot = task->lldd_task;
1870
1871 if (slot) {
1872 struct hisi_sas_cq *cq =
1873 &hisi_hba->cq[slot->dlvry_queue];
1874 /*
1875 * flush tasklet to avoid free'ing task
1876 * before using task in IO completion
1877 */
1878 tasklet_kill(&cq->tasklet);
1879 slot->task = NULL;
1880 }
1881 dev_err(dev, "internal task abort: timeout and not done.\n");
1882 res = -EIO;
1883 goto exit;
1884 } else
1885 dev_err(dev, "internal task abort: timeout.\n");
1886 }
1887
1888 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1889 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1890 res = TMF_RESP_FUNC_COMPLETE;
1891 goto exit;
1892 }
1893
1894 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1895 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1896 res = TMF_RESP_FUNC_SUCC;
1897 goto exit;
1898 }
1899
1900 exit:
1901 dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1902 "resp: 0x%x sts 0x%x\n",
1903 SAS_ADDR(device->sas_addr),
1904 task,
1905 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1906 task->task_status.stat);
1907 sas_free_task(task);
1908
1909 return res;
1910 }
1911
1912 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1913 {
1914 hisi_sas_port_notify_formed(sas_phy);
1915 }
1916
1917 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
1918 {
1919 }
1920
1921 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
1922 u8 reg_index, u8 reg_count, u8 *write_data)
1923 {
1924 struct hisi_hba *hisi_hba = sha->lldd_ha;
1925
1926 if (!hisi_hba->hw->write_gpio)
1927 return -EOPNOTSUPP;
1928
1929 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
1930 reg_index, reg_count, write_data);
1931 }
1932
1933 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1934 {
1935 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1936 struct sas_phy *sphy = sas_phy->phy;
1937 struct sas_phy_data *d = sphy->hostdata;
1938
1939 phy->phy_attached = 0;
1940 phy->phy_type = 0;
1941 phy->port = NULL;
1942
1943 if (d->enable)
1944 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
1945 else
1946 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
1947 }
1948
1949 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1950 {
1951 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1952 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1953 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1954 struct device *dev = hisi_hba->dev;
1955
1956 if (rdy) {
1957 /* Phy down but ready */
1958 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1959 hisi_sas_port_notify_formed(sas_phy);
1960 } else {
1961 struct hisi_sas_port *port = phy->port;
1962
1963 if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
1964 phy->in_reset) {
1965 dev_info(dev, "ignore flutter phy%d down\n", phy_no);
1966 return;
1967 }
1968 /* Phy down and not ready */
1969 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1970 sas_phy_disconnected(sas_phy);
1971
1972 if (port) {
1973 if (phy->phy_type & PORT_TYPE_SAS) {
1974 int port_id = port->id;
1975
1976 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1977 port_id))
1978 port->port_attached = 0;
1979 } else if (phy->phy_type & PORT_TYPE_SATA)
1980 port->port_attached = 0;
1981 }
1982 hisi_sas_phy_disconnected(phy);
1983 }
1984 }
1985 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1986
1987 void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba)
1988 {
1989 int i;
1990
1991 for (i = 0; i < hisi_hba->queue_count; i++) {
1992 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1993
1994 tasklet_kill(&cq->tasklet);
1995 }
1996 }
1997 EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
1998
1999 struct scsi_transport_template *hisi_sas_stt;
2000 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2001
2002 struct device_attribute *host_attrs[] = {
2003 &dev_attr_phy_event_threshold,
2004 NULL,
2005 };
2006 EXPORT_SYMBOL_GPL(host_attrs);
2007
2008 static struct sas_domain_function_template hisi_sas_transport_ops = {
2009 .lldd_dev_found = hisi_sas_dev_found,
2010 .lldd_dev_gone = hisi_sas_dev_gone,
2011 .lldd_execute_task = hisi_sas_queue_command,
2012 .lldd_control_phy = hisi_sas_control_phy,
2013 .lldd_abort_task = hisi_sas_abort_task,
2014 .lldd_abort_task_set = hisi_sas_abort_task_set,
2015 .lldd_clear_aca = hisi_sas_clear_aca,
2016 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
2017 .lldd_lu_reset = hisi_sas_lu_reset,
2018 .lldd_query_task = hisi_sas_query_task,
2019 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
2020 .lldd_port_formed = hisi_sas_port_formed,
2021 .lldd_port_deformed = hisi_sas_port_deformed,
2022 .lldd_write_gpio = hisi_sas_write_gpio,
2023 };
2024
2025 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2026 {
2027 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
2028
2029 for (i = 0; i < hisi_hba->queue_count; i++) {
2030 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2031 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2032
2033 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2034 memset(hisi_hba->cmd_hdr[i], 0, s);
2035 dq->wr_point = 0;
2036
2037 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2038 memset(hisi_hba->complete_hdr[i], 0, s);
2039 cq->rd_point = 0;
2040 }
2041
2042 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2043 memset(hisi_hba->initial_fis, 0, s);
2044
2045 s = max_command_entries * sizeof(struct hisi_sas_iost);
2046 memset(hisi_hba->iost, 0, s);
2047
2048 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2049 memset(hisi_hba->breakpoint, 0, s);
2050
2051 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2052 memset(hisi_hba->sata_breakpoint, 0, s);
2053 }
2054 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2055
2056 int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
2057 {
2058 struct device *dev = hisi_hba->dev;
2059 int i, j, s, max_command_entries = hisi_hba->hw->max_command_entries;
2060 int max_command_entries_ru, sz_slot_buf_ru;
2061 int blk_cnt, slots_per_blk;
2062
2063 sema_init(&hisi_hba->sem, 1);
2064 spin_lock_init(&hisi_hba->lock);
2065 for (i = 0; i < hisi_hba->n_phy; i++) {
2066 hisi_sas_phy_init(hisi_hba, i);
2067 hisi_hba->port[i].port_attached = 0;
2068 hisi_hba->port[i].id = -1;
2069 }
2070
2071 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2072 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2073 hisi_hba->devices[i].device_id = i;
2074 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
2075 }
2076
2077 for (i = 0; i < hisi_hba->queue_count; i++) {
2078 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2079 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2080
2081 /* Completion queue structure */
2082 cq->id = i;
2083 cq->hisi_hba = hisi_hba;
2084
2085 /* Delivery queue structure */
2086 spin_lock_init(&dq->lock);
2087 INIT_LIST_HEAD(&dq->list);
2088 dq->id = i;
2089 dq->hisi_hba = hisi_hba;
2090
2091 /* Delivery queue */
2092 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2093 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2094 &hisi_hba->cmd_hdr_dma[i],
2095 GFP_KERNEL);
2096 if (!hisi_hba->cmd_hdr[i])
2097 goto err_out;
2098
2099 /* Completion queue */
2100 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2101 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2102 &hisi_hba->complete_hdr_dma[i],
2103 GFP_KERNEL);
2104 if (!hisi_hba->complete_hdr[i])
2105 goto err_out;
2106 }
2107
2108 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2109 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2110 GFP_KERNEL);
2111 if (!hisi_hba->itct)
2112 goto err_out;
2113 memset(hisi_hba->itct, 0, s);
2114
2115 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2116 sizeof(struct hisi_sas_slot),
2117 GFP_KERNEL);
2118 if (!hisi_hba->slot_info)
2119 goto err_out;
2120
2121 /* roundup to avoid overly large block size */
2122 max_command_entries_ru = roundup(max_command_entries, 64);
2123 sz_slot_buf_ru = roundup(sizeof(struct hisi_sas_slot_buf_table), 64);
2124 s = lcm(max_command_entries_ru, sz_slot_buf_ru);
2125 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2126 slots_per_blk = s / sz_slot_buf_ru;
2127 for (i = 0; i < blk_cnt; i++) {
2128 struct hisi_sas_slot_buf_table *buf;
2129 dma_addr_t buf_dma;
2130 int slot_index = i * slots_per_blk;
2131
2132 buf = dmam_alloc_coherent(dev, s, &buf_dma, GFP_KERNEL);
2133 if (!buf)
2134 goto err_out;
2135 memset(buf, 0, s);
2136
2137 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2138 struct hisi_sas_slot *slot;
2139
2140 slot = &hisi_hba->slot_info[slot_index];
2141 slot->buf = buf;
2142 slot->buf_dma = buf_dma;
2143 slot->idx = slot_index;
2144
2145 buf++;
2146 buf_dma += sizeof(*buf);
2147 }
2148 }
2149
2150 s = max_command_entries * sizeof(struct hisi_sas_iost);
2151 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2152 GFP_KERNEL);
2153 if (!hisi_hba->iost)
2154 goto err_out;
2155
2156 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2157 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2158 &hisi_hba->breakpoint_dma,
2159 GFP_KERNEL);
2160 if (!hisi_hba->breakpoint)
2161 goto err_out;
2162
2163 hisi_hba->slot_index_count = max_command_entries;
2164 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
2165 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
2166 if (!hisi_hba->slot_index_tags)
2167 goto err_out;
2168
2169 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2170 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2171 &hisi_hba->initial_fis_dma,
2172 GFP_KERNEL);
2173 if (!hisi_hba->initial_fis)
2174 goto err_out;
2175
2176 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2177 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2178 &hisi_hba->sata_breakpoint_dma,
2179 GFP_KERNEL);
2180 if (!hisi_hba->sata_breakpoint)
2181 goto err_out;
2182 hisi_sas_init_mem(hisi_hba);
2183
2184 hisi_sas_slot_index_init(hisi_hba);
2185
2186 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2187 if (!hisi_hba->wq) {
2188 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2189 goto err_out;
2190 }
2191
2192 return 0;
2193 err_out:
2194 return -ENOMEM;
2195 }
2196 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2197
2198 void hisi_sas_free(struct hisi_hba *hisi_hba)
2199 {
2200 if (hisi_hba->wq)
2201 destroy_workqueue(hisi_hba->wq);
2202 }
2203 EXPORT_SYMBOL_GPL(hisi_sas_free);
2204
2205 void hisi_sas_rst_work_handler(struct work_struct *work)
2206 {
2207 struct hisi_hba *hisi_hba =
2208 container_of(work, struct hisi_hba, rst_work);
2209
2210 hisi_sas_controller_reset(hisi_hba);
2211 }
2212 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2213
2214 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2215 {
2216 struct hisi_sas_rst *rst =
2217 container_of(work, struct hisi_sas_rst, work);
2218
2219 if (!hisi_sas_controller_reset(rst->hisi_hba))
2220 rst->done = true;
2221 complete(rst->completion);
2222 }
2223 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2224
2225 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2226 {
2227 struct device *dev = hisi_hba->dev;
2228 struct platform_device *pdev = hisi_hba->platform_dev;
2229 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2230 struct clk *refclk;
2231
2232 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2233 SAS_ADDR_SIZE)) {
2234 dev_err(dev, "could not get property sas-addr\n");
2235 return -ENOENT;
2236 }
2237
2238 if (np) {
2239 /*
2240 * These properties are only required for platform device-based
2241 * controller with DT firmware.
2242 */
2243 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2244 "hisilicon,sas-syscon");
2245 if (IS_ERR(hisi_hba->ctrl)) {
2246 dev_err(dev, "could not get syscon\n");
2247 return -ENOENT;
2248 }
2249
2250 if (device_property_read_u32(dev, "ctrl-reset-reg",
2251 &hisi_hba->ctrl_reset_reg)) {
2252 dev_err(dev,
2253 "could not get property ctrl-reset-reg\n");
2254 return -ENOENT;
2255 }
2256
2257 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2258 &hisi_hba->ctrl_reset_sts_reg)) {
2259 dev_err(dev,
2260 "could not get property ctrl-reset-sts-reg\n");
2261 return -ENOENT;
2262 }
2263
2264 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2265 &hisi_hba->ctrl_clock_ena_reg)) {
2266 dev_err(dev,
2267 "could not get property ctrl-clock-ena-reg\n");
2268 return -ENOENT;
2269 }
2270 }
2271
2272 refclk = devm_clk_get(dev, NULL);
2273 if (IS_ERR(refclk))
2274 dev_dbg(dev, "no ref clk property\n");
2275 else
2276 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2277
2278 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2279 dev_err(dev, "could not get property phy-count\n");
2280 return -ENOENT;
2281 }
2282
2283 if (device_property_read_u32(dev, "queue-count",
2284 &hisi_hba->queue_count)) {
2285 dev_err(dev, "could not get property queue-count\n");
2286 return -ENOENT;
2287 }
2288
2289 return 0;
2290 }
2291 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2292
2293 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2294 const struct hisi_sas_hw *hw)
2295 {
2296 struct resource *res;
2297 struct Scsi_Host *shost;
2298 struct hisi_hba *hisi_hba;
2299 struct device *dev = &pdev->dev;
2300
2301 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2302 if (!shost) {
2303 dev_err(dev, "scsi host alloc failed\n");
2304 return NULL;
2305 }
2306 hisi_hba = shost_priv(shost);
2307
2308 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2309 hisi_hba->hw = hw;
2310 hisi_hba->dev = dev;
2311 hisi_hba->platform_dev = pdev;
2312 hisi_hba->shost = shost;
2313 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2314
2315 timer_setup(&hisi_hba->timer, NULL, 0);
2316
2317 if (hisi_sas_get_fw_info(hisi_hba) < 0)
2318 goto err_out;
2319
2320 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
2321 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
2322 dev_err(dev, "No usable DMA addressing method\n");
2323 goto err_out;
2324 }
2325
2326 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2327 hisi_hba->regs = devm_ioremap_resource(dev, res);
2328 if (IS_ERR(hisi_hba->regs))
2329 goto err_out;
2330
2331 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2332 if (res) {
2333 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2334 if (IS_ERR(hisi_hba->sgpio_regs))
2335 goto err_out;
2336 }
2337
2338 if (hisi_sas_alloc(hisi_hba, shost)) {
2339 hisi_sas_free(hisi_hba);
2340 goto err_out;
2341 }
2342
2343 return shost;
2344 err_out:
2345 scsi_host_put(shost);
2346 dev_err(dev, "shost alloc failed\n");
2347 return NULL;
2348 }
2349
2350 int hisi_sas_probe(struct platform_device *pdev,
2351 const struct hisi_sas_hw *hw)
2352 {
2353 struct Scsi_Host *shost;
2354 struct hisi_hba *hisi_hba;
2355 struct device *dev = &pdev->dev;
2356 struct asd_sas_phy **arr_phy;
2357 struct asd_sas_port **arr_port;
2358 struct sas_ha_struct *sha;
2359 int rc, phy_nr, port_nr, i;
2360
2361 shost = hisi_sas_shost_alloc(pdev, hw);
2362 if (!shost)
2363 return -ENOMEM;
2364
2365 sha = SHOST_TO_SAS_HA(shost);
2366 hisi_hba = shost_priv(shost);
2367 platform_set_drvdata(pdev, sha);
2368
2369 phy_nr = port_nr = hisi_hba->n_phy;
2370
2371 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2372 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2373 if (!arr_phy || !arr_port) {
2374 rc = -ENOMEM;
2375 goto err_out_ha;
2376 }
2377
2378 sha->sas_phy = arr_phy;
2379 sha->sas_port = arr_port;
2380 sha->lldd_ha = hisi_hba;
2381
2382 shost->transportt = hisi_sas_stt;
2383 shost->max_id = HISI_SAS_MAX_DEVICES;
2384 shost->max_lun = ~0;
2385 shost->max_channel = 1;
2386 shost->max_cmd_len = 16;
2387 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
2388 shost->can_queue = hisi_hba->hw->max_command_entries;
2389 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
2390
2391 sha->sas_ha_name = DRV_NAME;
2392 sha->dev = hisi_hba->dev;
2393 sha->lldd_module = THIS_MODULE;
2394 sha->sas_addr = &hisi_hba->sas_addr[0];
2395 sha->num_phys = hisi_hba->n_phy;
2396 sha->core.shost = hisi_hba->shost;
2397
2398 for (i = 0; i < hisi_hba->n_phy; i++) {
2399 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2400 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2401 }
2402
2403 rc = scsi_add_host(shost, &pdev->dev);
2404 if (rc)
2405 goto err_out_ha;
2406
2407 rc = sas_register_ha(sha);
2408 if (rc)
2409 goto err_out_register_ha;
2410
2411 rc = hisi_hba->hw->hw_init(hisi_hba);
2412 if (rc)
2413 goto err_out_register_ha;
2414
2415 scsi_scan_host(shost);
2416
2417 return 0;
2418
2419 err_out_register_ha:
2420 scsi_remove_host(shost);
2421 err_out_ha:
2422 hisi_sas_free(hisi_hba);
2423 scsi_host_put(shost);
2424 return rc;
2425 }
2426 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2427
2428 int hisi_sas_remove(struct platform_device *pdev)
2429 {
2430 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2431 struct hisi_hba *hisi_hba = sha->lldd_ha;
2432 struct Scsi_Host *shost = sha->core.shost;
2433
2434 if (timer_pending(&hisi_hba->timer))
2435 del_timer(&hisi_hba->timer);
2436
2437 sas_unregister_ha(sha);
2438 sas_remove_host(sha->core.shost);
2439
2440 hisi_sas_free(hisi_hba);
2441 scsi_host_put(shost);
2442 return 0;
2443 }
2444 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2445
2446 static __init int hisi_sas_init(void)
2447 {
2448 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2449 if (!hisi_sas_stt)
2450 return -ENOMEM;
2451
2452 return 0;
2453 }
2454
2455 static __exit void hisi_sas_exit(void)
2456 {
2457 sas_release_transport(hisi_sas_stt);
2458 }
2459
2460 module_init(hisi_sas_init);
2461 module_exit(hisi_sas_exit);
2462
2463 MODULE_LICENSE("GPL");
2464 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2465 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2466 MODULE_ALIAS("platform:" DRV_NAME);
Linux with added FPC-III support