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2908d778 JB |
1 | /* |
2 | * Serial Attached SCSI (SAS) class SCSI Host glue. | |
3 | * | |
4 | * Copyright (C) 2005 Adaptec, Inc. All rights reserved. | |
5 | * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> | |
6 | * | |
7 | * This file is licensed under GPLv2. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation; either version 2 of the | |
12 | * License, or (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | * | |
24 | */ | |
25 | ||
d7a54e30 | 26 | #include <linux/kthread.h> |
45e6cdf4 DW |
27 | #include <linux/firmware.h> |
28 | #include <linux/ctype.h> | |
d7a54e30 | 29 | |
2908d778 JB |
30 | #include "sas_internal.h" |
31 | ||
32 | #include <scsi/scsi_host.h> | |
33 | #include <scsi/scsi_device.h> | |
34 | #include <scsi/scsi_tcq.h> | |
35 | #include <scsi/scsi.h> | |
f456393e | 36 | #include <scsi/scsi_eh.h> |
2908d778 JB |
37 | #include <scsi/scsi_transport.h> |
38 | #include <scsi/scsi_transport_sas.h> | |
338ec570 | 39 | #include <scsi/sas_ata.h> |
2908d778 | 40 | #include "../scsi_sas_internal.h" |
79a5eb60 | 41 | #include "../scsi_transport_api.h" |
ad689233 | 42 | #include "../scsi_priv.h" |
2908d778 JB |
43 | |
44 | #include <linux/err.h> | |
45 | #include <linux/blkdev.h> | |
83144186 | 46 | #include <linux/freezer.h> |
5a0e3ad6 | 47 | #include <linux/gfp.h> |
2908d778 | 48 | #include <linux/scatterlist.h> |
fa1c1e8f | 49 | #include <linux/libata.h> |
2908d778 JB |
50 | |
51 | /* ---------- SCSI Host glue ---------- */ | |
52 | ||
2908d778 JB |
53 | static void sas_scsi_task_done(struct sas_task *task) |
54 | { | |
55 | struct task_status_struct *ts = &task->task_status; | |
56 | struct scsi_cmnd *sc = task->uldd_task; | |
2908d778 JB |
57 | int hs = 0, stat = 0; |
58 | ||
a8e14fec JB |
59 | if (unlikely(task->task_state_flags & SAS_TASK_STATE_ABORTED)) { |
60 | /* Aborted tasks will be completed by the error handler */ | |
61 | SAS_DPRINTK("task done but aborted\n"); | |
62 | return; | |
63 | } | |
64 | ||
2908d778 JB |
65 | if (unlikely(!sc)) { |
66 | SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n"); | |
67 | list_del_init(&task->list); | |
68 | sas_free_task(task); | |
69 | return; | |
70 | } | |
71 | ||
72 | if (ts->resp == SAS_TASK_UNDELIVERED) { | |
73 | /* transport error */ | |
74 | hs = DID_NO_CONNECT; | |
75 | } else { /* ts->resp == SAS_TASK_COMPLETE */ | |
76 | /* task delivered, what happened afterwards? */ | |
77 | switch (ts->stat) { | |
78 | case SAS_DEV_NO_RESPONSE: | |
79 | case SAS_INTERRUPTED: | |
80 | case SAS_PHY_DOWN: | |
81 | case SAS_NAK_R_ERR: | |
82 | case SAS_OPEN_TO: | |
83 | hs = DID_NO_CONNECT; | |
84 | break; | |
85 | case SAS_DATA_UNDERRUN: | |
c13e5566 FT |
86 | scsi_set_resid(sc, ts->residual); |
87 | if (scsi_bufflen(sc) - scsi_get_resid(sc) < sc->underflow) | |
2908d778 JB |
88 | hs = DID_ERROR; |
89 | break; | |
90 | case SAS_DATA_OVERRUN: | |
91 | hs = DID_ERROR; | |
92 | break; | |
93 | case SAS_QUEUE_FULL: | |
94 | hs = DID_SOFT_ERROR; /* retry */ | |
95 | break; | |
96 | case SAS_DEVICE_UNKNOWN: | |
97 | hs = DID_BAD_TARGET; | |
98 | break; | |
99 | case SAS_SG_ERR: | |
100 | hs = DID_PARITY; | |
101 | break; | |
102 | case SAS_OPEN_REJECT: | |
103 | if (ts->open_rej_reason == SAS_OREJ_RSVD_RETRY) | |
104 | hs = DID_SOFT_ERROR; /* retry */ | |
105 | else | |
106 | hs = DID_ERROR; | |
107 | break; | |
108 | case SAS_PROTO_RESPONSE: | |
109 | SAS_DPRINTK("LLDD:%s sent SAS_PROTO_RESP for an SSP " | |
110 | "task; please report this\n", | |
111 | task->dev->port->ha->sas_ha_name); | |
112 | break; | |
113 | case SAS_ABORTED_TASK: | |
114 | hs = DID_ABORT; | |
115 | break; | |
116 | case SAM_CHECK_COND: | |
117 | memcpy(sc->sense_buffer, ts->buf, | |
cc75e8ab | 118 | min(SCSI_SENSE_BUFFERSIZE, ts->buf_valid_size)); |
2908d778 JB |
119 | stat = SAM_CHECK_COND; |
120 | break; | |
121 | default: | |
122 | stat = ts->stat; | |
123 | break; | |
124 | } | |
125 | } | |
126 | ASSIGN_SAS_TASK(sc, NULL); | |
127 | sc->result = (hs << 16) | stat; | |
128 | list_del_init(&task->list); | |
129 | sas_free_task(task); | |
a8e14fec | 130 | sc->scsi_done(sc); |
2908d778 JB |
131 | } |
132 | ||
133 | static enum task_attribute sas_scsi_get_task_attr(struct scsi_cmnd *cmd) | |
134 | { | |
135 | enum task_attribute ta = TASK_ATTR_SIMPLE; | |
136 | if (cmd->request && blk_rq_tagged(cmd->request)) { | |
137 | if (cmd->device->ordered_tags && | |
1bdfd554 | 138 | (cmd->request->cmd_flags & REQ_HARDBARRIER)) |
63bb1bf0 | 139 | ta = TASK_ATTR_ORDERED; |
2908d778 JB |
140 | } |
141 | return ta; | |
142 | } | |
143 | ||
144 | static struct sas_task *sas_create_task(struct scsi_cmnd *cmd, | |
145 | struct domain_device *dev, | |
3cc27547 | 146 | gfp_t gfp_flags) |
2908d778 JB |
147 | { |
148 | struct sas_task *task = sas_alloc_task(gfp_flags); | |
149 | struct scsi_lun lun; | |
150 | ||
151 | if (!task) | |
152 | return NULL; | |
153 | ||
2908d778 JB |
154 | task->uldd_task = cmd; |
155 | ASSIGN_SAS_TASK(cmd, task); | |
156 | ||
157 | task->dev = dev; | |
158 | task->task_proto = task->dev->tproto; /* BUG_ON(!SSP) */ | |
159 | ||
160 | task->ssp_task.retry_count = 1; | |
161 | int_to_scsilun(cmd->device->lun, &lun); | |
162 | memcpy(task->ssp_task.LUN, &lun.scsi_lun, 8); | |
163 | task->ssp_task.task_attr = sas_scsi_get_task_attr(cmd); | |
164 | memcpy(task->ssp_task.cdb, cmd->cmnd, 16); | |
165 | ||
c13e5566 FT |
166 | task->scatter = scsi_sglist(cmd); |
167 | task->num_scatter = scsi_sg_count(cmd); | |
168 | task->total_xfer_len = scsi_bufflen(cmd); | |
2908d778 JB |
169 | task->data_dir = cmd->sc_data_direction; |
170 | ||
171 | task->task_done = sas_scsi_task_done; | |
172 | ||
173 | return task; | |
174 | } | |
175 | ||
338ec570 | 176 | int sas_queue_up(struct sas_task *task) |
2908d778 JB |
177 | { |
178 | struct sas_ha_struct *sas_ha = task->dev->port->ha; | |
179 | struct scsi_core *core = &sas_ha->core; | |
180 | unsigned long flags; | |
181 | LIST_HEAD(list); | |
182 | ||
183 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
184 | if (sas_ha->lldd_queue_size < core->task_queue_size + 1) { | |
185 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
186 | return -SAS_QUEUE_FULL; | |
187 | } | |
188 | list_add_tail(&task->list, &core->task_queue); | |
189 | core->task_queue_size += 1; | |
190 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
d7a54e30 | 191 | wake_up_process(core->queue_thread); |
2908d778 JB |
192 | |
193 | return 0; | |
194 | } | |
195 | ||
196 | /** | |
197 | * sas_queuecommand -- Enqueue a command for processing | |
198 | * @parameters: See SCSI Core documentation | |
199 | * | |
200 | * Note: XXX: Remove the host unlock/lock pair when SCSI Core can | |
201 | * call us without holding an IRQ spinlock... | |
202 | */ | |
203 | int sas_queuecommand(struct scsi_cmnd *cmd, | |
204 | void (*scsi_done)(struct scsi_cmnd *)) | |
8ee24023 DW |
205 | __releases(host->host_lock) |
206 | __acquires(dev->sata_dev.ap->lock) | |
207 | __releases(dev->sata_dev.ap->lock) | |
208 | __acquires(host->host_lock) | |
2908d778 JB |
209 | { |
210 | int res = 0; | |
211 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
212 | struct Scsi_Host *host = cmd->device->host; | |
213 | struct sas_internal *i = to_sas_internal(host->transportt); | |
214 | ||
215 | spin_unlock_irq(host->host_lock); | |
216 | ||
217 | { | |
218 | struct sas_ha_struct *sas_ha = dev->port->ha; | |
219 | struct sas_task *task; | |
220 | ||
fa1c1e8f | 221 | if (dev_is_sata(dev)) { |
3eb7a51a DW |
222 | unsigned long flags; |
223 | ||
224 | spin_lock_irqsave(dev->sata_dev.ap->lock, flags); | |
fa1c1e8f DW |
225 | res = ata_sas_queuecmd(cmd, scsi_done, |
226 | dev->sata_dev.ap); | |
3eb7a51a | 227 | spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags); |
fa1c1e8f DW |
228 | goto out; |
229 | } | |
230 | ||
2908d778 JB |
231 | res = -ENOMEM; |
232 | task = sas_create_task(cmd, dev, GFP_ATOMIC); | |
233 | if (!task) | |
234 | goto out; | |
235 | ||
236 | cmd->scsi_done = scsi_done; | |
237 | /* Queue up, Direct Mode or Task Collector Mode. */ | |
238 | if (sas_ha->lldd_max_execute_num < 2) | |
239 | res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); | |
240 | else | |
241 | res = sas_queue_up(task); | |
242 | ||
243 | /* Examine */ | |
244 | if (res) { | |
245 | SAS_DPRINTK("lldd_execute_task returned: %d\n", res); | |
246 | ASSIGN_SAS_TASK(cmd, NULL); | |
247 | sas_free_task(task); | |
248 | if (res == -SAS_QUEUE_FULL) { | |
249 | cmd->result = DID_SOFT_ERROR << 16; /* retry */ | |
250 | res = 0; | |
251 | scsi_done(cmd); | |
252 | } | |
253 | goto out; | |
254 | } | |
255 | } | |
256 | out: | |
257 | spin_lock_irq(host->host_lock); | |
258 | return res; | |
259 | } | |
260 | ||
a8e14fec JB |
261 | static void sas_eh_finish_cmd(struct scsi_cmnd *cmd) |
262 | { | |
263 | struct sas_task *task = TO_SAS_TASK(cmd); | |
264 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(cmd->device->host); | |
265 | ||
266 | /* remove the aborted task flag to allow the task to be | |
267 | * completed now. At this point, we only get called following | |
268 | * an actual abort of the task, so we should be guaranteed not | |
269 | * to be racing with any completions from the LLD (hence we | |
270 | * don't need the task state lock to clear the flag) */ | |
271 | task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; | |
272 | /* Now call task_done. However, task will be free'd after | |
273 | * this */ | |
274 | task->task_done(task); | |
275 | /* now finish the command and move it on to the error | |
276 | * handler done list, this also takes it off the | |
277 | * error handler pending list */ | |
278 | scsi_eh_finish_cmd(cmd, &sas_ha->eh_done_q); | |
279 | } | |
280 | ||
2908d778 JB |
281 | static void sas_scsi_clear_queue_lu(struct list_head *error_q, struct scsi_cmnd *my_cmd) |
282 | { | |
283 | struct scsi_cmnd *cmd, *n; | |
284 | ||
285 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
63e4563b JB |
286 | if (cmd->device->sdev_target == my_cmd->device->sdev_target && |
287 | cmd->device->lun == my_cmd->device->lun) | |
a8e14fec | 288 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
289 | } |
290 | } | |
291 | ||
292 | static void sas_scsi_clear_queue_I_T(struct list_head *error_q, | |
293 | struct domain_device *dev) | |
294 | { | |
295 | struct scsi_cmnd *cmd, *n; | |
296 | ||
297 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
298 | struct domain_device *x = cmd_to_domain_dev(cmd); | |
299 | ||
300 | if (x == dev) | |
a8e14fec | 301 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
302 | } |
303 | } | |
304 | ||
305 | static void sas_scsi_clear_queue_port(struct list_head *error_q, | |
306 | struct asd_sas_port *port) | |
307 | { | |
308 | struct scsi_cmnd *cmd, *n; | |
309 | ||
310 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
311 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
312 | struct asd_sas_port *x = dev->port; | |
313 | ||
314 | if (x == port) | |
a8e14fec | 315 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
316 | } |
317 | } | |
318 | ||
319 | enum task_disposition { | |
320 | TASK_IS_DONE, | |
321 | TASK_IS_ABORTED, | |
322 | TASK_IS_AT_LU, | |
323 | TASK_IS_NOT_AT_LU, | |
02cd743b | 324 | TASK_ABORT_FAILED, |
2908d778 JB |
325 | }; |
326 | ||
327 | static enum task_disposition sas_scsi_find_task(struct sas_task *task) | |
328 | { | |
329 | struct sas_ha_struct *ha = task->dev->port->ha; | |
330 | unsigned long flags; | |
331 | int i, res; | |
332 | struct sas_internal *si = | |
333 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
334 | ||
335 | if (ha->lldd_max_execute_num > 1) { | |
336 | struct scsi_core *core = &ha->core; | |
337 | struct sas_task *t, *n; | |
338 | ||
339 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
340 | list_for_each_entry_safe(t, n, &core->task_queue, list) { | |
341 | if (task == t) { | |
342 | list_del_init(&t->list); | |
343 | spin_unlock_irqrestore(&core->task_queue_lock, | |
344 | flags); | |
345 | SAS_DPRINTK("%s: task 0x%p aborted from " | |
346 | "task_queue\n", | |
cadbd4a5 | 347 | __func__, task); |
2908d778 JB |
348 | return TASK_IS_ABORTED; |
349 | } | |
350 | } | |
351 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
352 | } | |
353 | ||
354 | for (i = 0; i < 5; i++) { | |
cadbd4a5 | 355 | SAS_DPRINTK("%s: aborting task 0x%p\n", __func__, task); |
2908d778 JB |
356 | res = si->dft->lldd_abort_task(task); |
357 | ||
358 | spin_lock_irqsave(&task->task_state_lock, flags); | |
359 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { | |
360 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
cadbd4a5 | 361 | SAS_DPRINTK("%s: task 0x%p is done\n", __func__, |
2908d778 JB |
362 | task); |
363 | return TASK_IS_DONE; | |
364 | } | |
365 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
366 | ||
367 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
368 | SAS_DPRINTK("%s: task 0x%p is aborted\n", | |
cadbd4a5 | 369 | __func__, task); |
2908d778 JB |
370 | return TASK_IS_ABORTED; |
371 | } else if (si->dft->lldd_query_task) { | |
372 | SAS_DPRINTK("%s: querying task 0x%p\n", | |
cadbd4a5 | 373 | __func__, task); |
2908d778 | 374 | res = si->dft->lldd_query_task(task); |
02cd743b DW |
375 | switch (res) { |
376 | case TMF_RESP_FUNC_SUCC: | |
2908d778 | 377 | SAS_DPRINTK("%s: task 0x%p at LU\n", |
cadbd4a5 | 378 | __func__, task); |
2908d778 | 379 | return TASK_IS_AT_LU; |
02cd743b | 380 | case TMF_RESP_FUNC_COMPLETE: |
2908d778 | 381 | SAS_DPRINTK("%s: task 0x%p not at LU\n", |
cadbd4a5 | 382 | __func__, task); |
2908d778 | 383 | return TASK_IS_NOT_AT_LU; |
02cd743b DW |
384 | case TMF_RESP_FUNC_FAILED: |
385 | SAS_DPRINTK("%s: task 0x%p failed to abort\n", | |
cadbd4a5 | 386 | __func__, task); |
02cd743b DW |
387 | return TASK_ABORT_FAILED; |
388 | } | |
389 | ||
2908d778 JB |
390 | } |
391 | } | |
392 | return res; | |
393 | } | |
394 | ||
395 | static int sas_recover_lu(struct domain_device *dev, struct scsi_cmnd *cmd) | |
396 | { | |
397 | int res = TMF_RESP_FUNC_FAILED; | |
398 | struct scsi_lun lun; | |
399 | struct sas_internal *i = | |
400 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
401 | ||
402 | int_to_scsilun(cmd->device->lun, &lun); | |
403 | ||
404 | SAS_DPRINTK("eh: device %llx LUN %x has the task\n", | |
405 | SAS_ADDR(dev->sas_addr), | |
406 | cmd->device->lun); | |
407 | ||
408 | if (i->dft->lldd_abort_task_set) | |
409 | res = i->dft->lldd_abort_task_set(dev, lun.scsi_lun); | |
410 | ||
411 | if (res == TMF_RESP_FUNC_FAILED) { | |
412 | if (i->dft->lldd_clear_task_set) | |
413 | res = i->dft->lldd_clear_task_set(dev, lun.scsi_lun); | |
414 | } | |
415 | ||
416 | if (res == TMF_RESP_FUNC_FAILED) { | |
417 | if (i->dft->lldd_lu_reset) | |
418 | res = i->dft->lldd_lu_reset(dev, lun.scsi_lun); | |
419 | } | |
420 | ||
421 | return res; | |
422 | } | |
423 | ||
424 | static int sas_recover_I_T(struct domain_device *dev) | |
425 | { | |
426 | int res = TMF_RESP_FUNC_FAILED; | |
427 | struct sas_internal *i = | |
428 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
429 | ||
430 | SAS_DPRINTK("I_T nexus reset for dev %016llx\n", | |
431 | SAS_ADDR(dev->sas_addr)); | |
432 | ||
433 | if (i->dft->lldd_I_T_nexus_reset) | |
434 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
435 | ||
436 | return res; | |
437 | } | |
438 | ||
ad689233 | 439 | /* Find the sas_phy that's attached to this device */ |
5319578c | 440 | struct sas_phy *sas_find_local_phy(struct domain_device *dev) |
3ebf6922 | 441 | { |
ad689233 DW |
442 | struct domain_device *pdev = dev->parent; |
443 | struct ex_phy *exphy = NULL; | |
444 | int i; | |
445 | ||
446 | /* Directly attached device */ | |
447 | if (!pdev) | |
448 | return dev->port->phy; | |
3ebf6922 | 449 | |
ad689233 DW |
450 | /* Otherwise look in the expander */ |
451 | for (i = 0; i < pdev->ex_dev.num_phys; i++) | |
452 | if (!memcmp(dev->sas_addr, | |
453 | pdev->ex_dev.ex_phy[i].attached_sas_addr, | |
454 | SAS_ADDR_SIZE)) { | |
455 | exphy = &pdev->ex_dev.ex_phy[i]; | |
456 | break; | |
457 | } | |
3ebf6922 | 458 | |
ad689233 DW |
459 | BUG_ON(!exphy); |
460 | return exphy->phy; | |
3ebf6922 | 461 | } |
5319578c | 462 | EXPORT_SYMBOL_GPL(sas_find_local_phy); |
3ebf6922 | 463 | |
a9344e68 | 464 | /* Attempt to send a LUN reset message to a device */ |
ad689233 | 465 | int sas_eh_device_reset_handler(struct scsi_cmnd *cmd) |
a9344e68 DW |
466 | { |
467 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
468 | struct sas_internal *i = | |
469 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
470 | struct scsi_lun lun; | |
471 | int res; | |
472 | ||
473 | int_to_scsilun(cmd->device->lun, &lun); | |
474 | ||
475 | if (!i->dft->lldd_lu_reset) | |
476 | return FAILED; | |
477 | ||
478 | res = i->dft->lldd_lu_reset(dev, lun.scsi_lun); | |
479 | if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) | |
480 | return SUCCESS; | |
481 | ||
482 | return FAILED; | |
483 | } | |
484 | ||
485 | /* Attempt to send a phy (bus) reset */ | |
486 | int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd) | |
ad689233 DW |
487 | { |
488 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
5319578c | 489 | struct sas_phy *phy = sas_find_local_phy(dev); |
ad689233 DW |
490 | int res; |
491 | ||
492 | res = sas_phy_reset(phy, 1); | |
493 | if (res) | |
a9344e68 | 494 | SAS_DPRINTK("Bus reset of %s failed 0x%x\n", |
af5ca3f4 | 495 | kobject_name(&phy->dev.kobj), |
ad689233 DW |
496 | res); |
497 | if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) | |
498 | return SUCCESS; | |
499 | ||
500 | return FAILED; | |
501 | } | |
502 | ||
503 | /* Try to reset a device */ | |
8de3ef25 | 504 | static int try_to_reset_cmd_device(struct scsi_cmnd *cmd) |
ad689233 | 505 | { |
a9344e68 | 506 | int res; |
8de3ef25 | 507 | struct Scsi_Host *shost = cmd->device->host; |
a9344e68 | 508 | |
ad689233 | 509 | if (!shost->hostt->eh_device_reset_handler) |
a9344e68 DW |
510 | goto try_bus_reset; |
511 | ||
512 | res = shost->hostt->eh_device_reset_handler(cmd); | |
513 | if (res == SUCCESS) | |
514 | return res; | |
ad689233 | 515 | |
a9344e68 DW |
516 | try_bus_reset: |
517 | if (shost->hostt->eh_bus_reset_handler) | |
518 | return shost->hostt->eh_bus_reset_handler(cmd); | |
519 | ||
520 | return FAILED; | |
ad689233 DW |
521 | } |
522 | ||
523 | static int sas_eh_handle_sas_errors(struct Scsi_Host *shost, | |
524 | struct list_head *work_q, | |
525 | struct list_head *done_q) | |
2908d778 | 526 | { |
2908d778 JB |
527 | struct scsi_cmnd *cmd, *n; |
528 | enum task_disposition res = TASK_IS_DONE; | |
3ebf6922 | 529 | int tmf_resp, need_reset; |
2908d778 | 530 | struct sas_internal *i = to_sas_internal(shost->transportt); |
ad689233 DW |
531 | unsigned long flags; |
532 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
2908d778 | 533 | |
2908d778 | 534 | Again: |
ad689233 | 535 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
2908d778 JB |
536 | struct sas_task *task = TO_SAS_TASK(cmd); |
537 | ||
ad689233 | 538 | if (!task) |
f456393e | 539 | continue; |
ad689233 DW |
540 | |
541 | list_del_init(&cmd->eh_entry); | |
3ebf6922 DW |
542 | |
543 | spin_lock_irqsave(&task->task_state_lock, flags); | |
544 | need_reset = task->task_state_flags & SAS_TASK_NEED_DEV_RESET; | |
3ebf6922 DW |
545 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
546 | ||
8de3ef25 JB |
547 | if (need_reset) { |
548 | SAS_DPRINTK("%s: task 0x%p requests reset\n", | |
cadbd4a5 | 549 | __func__, task); |
8de3ef25 JB |
550 | goto reset; |
551 | } | |
552 | ||
2908d778 | 553 | SAS_DPRINTK("trying to find task 0x%p\n", task); |
2908d778 JB |
554 | res = sas_scsi_find_task(task); |
555 | ||
556 | cmd->eh_eflags = 0; | |
2908d778 JB |
557 | |
558 | switch (res) { | |
559 | case TASK_IS_DONE: | |
cadbd4a5 | 560 | SAS_DPRINTK("%s: task 0x%p is done\n", __func__, |
2908d778 | 561 | task); |
a8e14fec | 562 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
563 | continue; |
564 | case TASK_IS_ABORTED: | |
565 | SAS_DPRINTK("%s: task 0x%p is aborted\n", | |
cadbd4a5 | 566 | __func__, task); |
a8e14fec | 567 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
568 | continue; |
569 | case TASK_IS_AT_LU: | |
570 | SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task); | |
8de3ef25 | 571 | reset: |
2908d778 JB |
572 | tmf_resp = sas_recover_lu(task->dev, cmd); |
573 | if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { | |
574 | SAS_DPRINTK("dev %016llx LU %x is " | |
575 | "recovered\n", | |
576 | SAS_ADDR(task->dev), | |
577 | cmd->device->lun); | |
a8e14fec | 578 | sas_eh_finish_cmd(cmd); |
ad689233 | 579 | sas_scsi_clear_queue_lu(work_q, cmd); |
2908d778 JB |
580 | goto Again; |
581 | } | |
582 | /* fallthrough */ | |
583 | case TASK_IS_NOT_AT_LU: | |
02cd743b | 584 | case TASK_ABORT_FAILED: |
2908d778 JB |
585 | SAS_DPRINTK("task 0x%p is not at LU: I_T recover\n", |
586 | task); | |
587 | tmf_resp = sas_recover_I_T(task->dev); | |
588 | if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { | |
8de3ef25 | 589 | struct domain_device *dev = task->dev; |
2908d778 JB |
590 | SAS_DPRINTK("I_T %016llx recovered\n", |
591 | SAS_ADDR(task->dev->sas_addr)); | |
a8e14fec | 592 | sas_eh_finish_cmd(cmd); |
8de3ef25 | 593 | sas_scsi_clear_queue_I_T(work_q, dev); |
2908d778 JB |
594 | goto Again; |
595 | } | |
596 | /* Hammer time :-) */ | |
8de3ef25 | 597 | try_to_reset_cmd_device(cmd); |
2908d778 JB |
598 | if (i->dft->lldd_clear_nexus_port) { |
599 | struct asd_sas_port *port = task->dev->port; | |
600 | SAS_DPRINTK("clearing nexus for port:%d\n", | |
601 | port->id); | |
602 | res = i->dft->lldd_clear_nexus_port(port); | |
603 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
604 | SAS_DPRINTK("clear nexus port:%d " | |
605 | "succeeded\n", port->id); | |
a8e14fec | 606 | sas_eh_finish_cmd(cmd); |
ad689233 | 607 | sas_scsi_clear_queue_port(work_q, |
2908d778 JB |
608 | port); |
609 | goto Again; | |
610 | } | |
611 | } | |
612 | if (i->dft->lldd_clear_nexus_ha) { | |
613 | SAS_DPRINTK("clear nexus ha\n"); | |
614 | res = i->dft->lldd_clear_nexus_ha(ha); | |
615 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
616 | SAS_DPRINTK("clear nexus ha " | |
617 | "succeeded\n"); | |
a8e14fec | 618 | sas_eh_finish_cmd(cmd); |
a8e14fec | 619 | goto clear_q; |
2908d778 JB |
620 | } |
621 | } | |
622 | /* If we are here -- this means that no amount | |
623 | * of effort could recover from errors. Quite | |
624 | * possibly the HA just disappeared. | |
625 | */ | |
626 | SAS_DPRINTK("error from device %llx, LUN %x " | |
627 | "couldn't be recovered in any way\n", | |
628 | SAS_ADDR(task->dev->sas_addr), | |
629 | cmd->device->lun); | |
630 | ||
a8e14fec | 631 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
632 | goto clear_q; |
633 | } | |
634 | } | |
ad689233 | 635 | return list_empty(work_q); |
2908d778 | 636 | clear_q: |
cadbd4a5 | 637 | SAS_DPRINTK("--- Exit %s -- clear_q\n", __func__); |
a8e14fec JB |
638 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) |
639 | sas_eh_finish_cmd(cmd); | |
640 | ||
ad689233 DW |
641 | return list_empty(work_q); |
642 | } | |
643 | ||
644 | void sas_scsi_recover_host(struct Scsi_Host *shost) | |
645 | { | |
646 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
647 | unsigned long flags; | |
648 | LIST_HEAD(eh_work_q); | |
649 | ||
650 | spin_lock_irqsave(shost->host_lock, flags); | |
651 | list_splice_init(&shost->eh_cmd_q, &eh_work_q); | |
652 | spin_unlock_irqrestore(shost->host_lock, flags); | |
653 | ||
cadbd4a5 | 654 | SAS_DPRINTK("Enter %s\n", __func__); |
ad689233 DW |
655 | /* |
656 | * Deal with commands that still have SAS tasks (i.e. they didn't | |
657 | * complete via the normal sas_task completion mechanism) | |
658 | */ | |
659 | if (sas_eh_handle_sas_errors(shost, &eh_work_q, &ha->eh_done_q)) | |
660 | goto out; | |
661 | ||
662 | /* | |
663 | * Now deal with SCSI commands that completed ok but have a an error | |
664 | * code (and hopefully sense data) attached. This is roughly what | |
665 | * scsi_unjam_host does, but we skip scsi_eh_abort_cmds because any | |
666 | * command we see here has no sas_task and is thus unknown to the HA. | |
667 | */ | |
668 | if (!scsi_eh_get_sense(&eh_work_q, &ha->eh_done_q)) | |
669 | scsi_eh_ready_devs(shost, &eh_work_q, &ha->eh_done_q); | |
670 | ||
671 | out: | |
672 | scsi_eh_flush_done_q(&ha->eh_done_q); | |
cadbd4a5 | 673 | SAS_DPRINTK("--- Exit %s\n", __func__); |
ad689233 | 674 | return; |
2908d778 JB |
675 | } |
676 | ||
242f9dcb | 677 | enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd) |
2908d778 JB |
678 | { |
679 | struct sas_task *task = TO_SAS_TASK(cmd); | |
680 | unsigned long flags; | |
681 | ||
682 | if (!task) { | |
242f9dcb | 683 | cmd->request->timeout /= 2; |
6d4dcd4d | 684 | SAS_DPRINTK("command 0x%p, task 0x%p, gone: %s\n", |
242f9dcb JA |
685 | cmd, task, (cmd->request->timeout ? |
686 | "BLK_EH_RESET_TIMER" : "BLK_EH_NOT_HANDLED")); | |
687 | if (!cmd->request->timeout) | |
688 | return BLK_EH_NOT_HANDLED; | |
689 | return BLK_EH_RESET_TIMER; | |
2908d778 JB |
690 | } |
691 | ||
692 | spin_lock_irqsave(&task->task_state_lock, flags); | |
396819fb | 693 | BUG_ON(task->task_state_flags & SAS_TASK_STATE_ABORTED); |
2908d778 JB |
694 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { |
695 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
242f9dcb JA |
696 | SAS_DPRINTK("command 0x%p, task 0x%p, timed out: " |
697 | "BLK_EH_HANDLED\n", cmd, task); | |
698 | return BLK_EH_HANDLED; | |
2908d778 | 699 | } |
b218a0d8 DW |
700 | if (!(task->task_state_flags & SAS_TASK_AT_INITIATOR)) { |
701 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
702 | SAS_DPRINTK("command 0x%p, task 0x%p, not at initiator: " | |
242f9dcb | 703 | "BLK_EH_RESET_TIMER\n", |
b218a0d8 | 704 | cmd, task); |
242f9dcb | 705 | return BLK_EH_RESET_TIMER; |
b218a0d8 | 706 | } |
2908d778 JB |
707 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
708 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
709 | ||
242f9dcb | 710 | SAS_DPRINTK("command 0x%p, task 0x%p, timed out: BLK_EH_NOT_HANDLED\n", |
2908d778 JB |
711 | cmd, task); |
712 | ||
242f9dcb | 713 | return BLK_EH_NOT_HANDLED; |
2908d778 JB |
714 | } |
715 | ||
fa1c1e8f DW |
716 | int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg) |
717 | { | |
718 | struct domain_device *dev = sdev_to_domain_dev(sdev); | |
719 | ||
720 | if (dev_is_sata(dev)) | |
94be9a58 | 721 | return ata_sas_scsi_ioctl(dev->sata_dev.ap, sdev, cmd, arg); |
fa1c1e8f DW |
722 | |
723 | return -EINVAL; | |
724 | } | |
725 | ||
2908d778 JB |
726 | struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy) |
727 | { | |
728 | struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent); | |
729 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
730 | struct domain_device *found_dev = NULL; | |
731 | int i; | |
980fa2f9 | 732 | unsigned long flags; |
2908d778 | 733 | |
980fa2f9 | 734 | spin_lock_irqsave(&ha->phy_port_lock, flags); |
2908d778 JB |
735 | for (i = 0; i < ha->num_phys; i++) { |
736 | struct asd_sas_port *port = ha->sas_port[i]; | |
737 | struct domain_device *dev; | |
738 | ||
739 | spin_lock(&port->dev_list_lock); | |
740 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
741 | if (rphy == dev->rphy) { | |
742 | found_dev = dev; | |
743 | spin_unlock(&port->dev_list_lock); | |
744 | goto found; | |
745 | } | |
746 | } | |
747 | spin_unlock(&port->dev_list_lock); | |
748 | } | |
749 | found: | |
980fa2f9 | 750 | spin_unlock_irqrestore(&ha->phy_port_lock, flags); |
2908d778 JB |
751 | |
752 | return found_dev; | |
753 | } | |
754 | ||
755 | static inline struct domain_device *sas_find_target(struct scsi_target *starget) | |
756 | { | |
757 | struct sas_rphy *rphy = dev_to_rphy(starget->dev.parent); | |
758 | ||
759 | return sas_find_dev_by_rphy(rphy); | |
760 | } | |
761 | ||
762 | int sas_target_alloc(struct scsi_target *starget) | |
763 | { | |
764 | struct domain_device *found_dev = sas_find_target(starget); | |
338ec570 | 765 | int res; |
2908d778 JB |
766 | |
767 | if (!found_dev) | |
768 | return -ENODEV; | |
769 | ||
fa1c1e8f | 770 | if (dev_is_sata(found_dev)) { |
338ec570 DW |
771 | res = sas_ata_init_host_and_port(found_dev, starget); |
772 | if (res) | |
773 | return res; | |
fa1c1e8f DW |
774 | } |
775 | ||
2908d778 JB |
776 | starget->hostdata = found_dev; |
777 | return 0; | |
778 | } | |
779 | ||
780 | #define SAS_DEF_QD 32 | |
781 | #define SAS_MAX_QD 64 | |
782 | ||
783 | int sas_slave_configure(struct scsi_device *scsi_dev) | |
784 | { | |
785 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); | |
786 | struct sas_ha_struct *sas_ha; | |
787 | ||
788 | BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE); | |
789 | ||
fa1c1e8f DW |
790 | if (dev_is_sata(dev)) { |
791 | ata_sas_slave_configure(scsi_dev, dev->sata_dev.ap); | |
792 | return 0; | |
793 | } | |
794 | ||
2908d778 JB |
795 | sas_ha = dev->port->ha; |
796 | ||
797 | sas_read_port_mode_page(scsi_dev); | |
798 | ||
799 | if (scsi_dev->tagged_supported) { | |
800 | scsi_set_tag_type(scsi_dev, MSG_SIMPLE_TAG); | |
801 | scsi_activate_tcq(scsi_dev, SAS_DEF_QD); | |
802 | } else { | |
803 | SAS_DPRINTK("device %llx, LUN %x doesn't support " | |
804 | "TCQ\n", SAS_ADDR(dev->sas_addr), | |
805 | scsi_dev->lun); | |
806 | scsi_dev->tagged_supported = 0; | |
807 | scsi_set_tag_type(scsi_dev, 0); | |
808 | scsi_deactivate_tcq(scsi_dev, 1); | |
809 | } | |
810 | ||
f27708fc DW |
811 | scsi_dev->allow_restart = 1; |
812 | ||
2908d778 JB |
813 | return 0; |
814 | } | |
815 | ||
816 | void sas_slave_destroy(struct scsi_device *scsi_dev) | |
817 | { | |
fa1c1e8f DW |
818 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); |
819 | ||
820 | if (dev_is_sata(dev)) | |
821 | ata_port_disable(dev->sata_dev.ap); | |
2908d778 JB |
822 | } |
823 | ||
e881a172 MC |
824 | int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth, |
825 | int reason) | |
2908d778 JB |
826 | { |
827 | int res = min(new_depth, SAS_MAX_QD); | |
828 | ||
e881a172 MC |
829 | if (reason != SCSI_QDEPTH_DEFAULT) |
830 | return -EOPNOTSUPP; | |
831 | ||
2908d778 JB |
832 | if (scsi_dev->tagged_supported) |
833 | scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), | |
834 | res); | |
835 | else { | |
836 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); | |
837 | sas_printk("device %llx LUN %x queue depth changed to 1\n", | |
838 | SAS_ADDR(dev->sas_addr), | |
839 | scsi_dev->lun); | |
840 | scsi_adjust_queue_depth(scsi_dev, 0, 1); | |
841 | res = 1; | |
842 | } | |
843 | ||
844 | return res; | |
845 | } | |
846 | ||
847 | int sas_change_queue_type(struct scsi_device *scsi_dev, int qt) | |
848 | { | |
849 | if (!scsi_dev->tagged_supported) | |
850 | return 0; | |
851 | ||
852 | scsi_deactivate_tcq(scsi_dev, 1); | |
853 | ||
854 | scsi_set_tag_type(scsi_dev, qt); | |
855 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); | |
856 | ||
857 | return qt; | |
858 | } | |
859 | ||
860 | int sas_bios_param(struct scsi_device *scsi_dev, | |
861 | struct block_device *bdev, | |
862 | sector_t capacity, int *hsc) | |
863 | { | |
864 | hsc[0] = 255; | |
865 | hsc[1] = 63; | |
866 | sector_div(capacity, 255*63); | |
867 | hsc[2] = capacity; | |
868 | ||
869 | return 0; | |
870 | } | |
871 | ||
872 | /* ---------- Task Collector Thread implementation ---------- */ | |
873 | ||
874 | static void sas_queue(struct sas_ha_struct *sas_ha) | |
875 | { | |
876 | struct scsi_core *core = &sas_ha->core; | |
877 | unsigned long flags; | |
878 | LIST_HEAD(q); | |
879 | int can_queue; | |
880 | int res; | |
881 | struct sas_internal *i = to_sas_internal(core->shost->transportt); | |
882 | ||
883 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
d7a54e30 | 884 | while (!kthread_should_stop() && |
2908d778 JB |
885 | !list_empty(&core->task_queue)) { |
886 | ||
887 | can_queue = sas_ha->lldd_queue_size - core->task_queue_size; | |
888 | if (can_queue >= 0) { | |
889 | can_queue = core->task_queue_size; | |
890 | list_splice_init(&core->task_queue, &q); | |
891 | } else { | |
892 | struct list_head *a, *n; | |
893 | ||
894 | can_queue = sas_ha->lldd_queue_size; | |
895 | list_for_each_safe(a, n, &core->task_queue) { | |
896 | list_move_tail(a, &q); | |
897 | if (--can_queue == 0) | |
898 | break; | |
899 | } | |
900 | can_queue = sas_ha->lldd_queue_size; | |
901 | } | |
902 | core->task_queue_size -= can_queue; | |
903 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
904 | { | |
905 | struct sas_task *task = list_entry(q.next, | |
906 | struct sas_task, | |
907 | list); | |
908 | list_del_init(&q); | |
909 | res = i->dft->lldd_execute_task(task, can_queue, | |
910 | GFP_KERNEL); | |
911 | if (unlikely(res)) | |
912 | __list_add(&q, task->list.prev, &task->list); | |
913 | } | |
914 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
915 | if (res) { | |
916 | list_splice_init(&q, &core->task_queue); /*at head*/ | |
917 | core->task_queue_size += can_queue; | |
918 | } | |
919 | } | |
920 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
921 | } | |
922 | ||
2908d778 JB |
923 | /** |
924 | * sas_queue_thread -- The Task Collector thread | |
925 | * @_sas_ha: pointer to struct sas_ha | |
926 | */ | |
927 | static int sas_queue_thread(void *_sas_ha) | |
928 | { | |
929 | struct sas_ha_struct *sas_ha = _sas_ha; | |
2908d778 | 930 | |
2908d778 | 931 | while (1) { |
d7a54e30 CH |
932 | set_current_state(TASK_INTERRUPTIBLE); |
933 | schedule(); | |
2908d778 | 934 | sas_queue(sas_ha); |
d7a54e30 | 935 | if (kthread_should_stop()) |
2908d778 JB |
936 | break; |
937 | } | |
938 | ||
2908d778 JB |
939 | return 0; |
940 | } | |
941 | ||
942 | int sas_init_queue(struct sas_ha_struct *sas_ha) | |
943 | { | |
2908d778 JB |
944 | struct scsi_core *core = &sas_ha->core; |
945 | ||
946 | spin_lock_init(&core->task_queue_lock); | |
947 | core->task_queue_size = 0; | |
948 | INIT_LIST_HEAD(&core->task_queue); | |
2908d778 | 949 | |
d7a54e30 CH |
950 | core->queue_thread = kthread_run(sas_queue_thread, sas_ha, |
951 | "sas_queue_%d", core->shost->host_no); | |
952 | if (IS_ERR(core->queue_thread)) | |
953 | return PTR_ERR(core->queue_thread); | |
954 | return 0; | |
2908d778 JB |
955 | } |
956 | ||
957 | void sas_shutdown_queue(struct sas_ha_struct *sas_ha) | |
958 | { | |
959 | unsigned long flags; | |
960 | struct scsi_core *core = &sas_ha->core; | |
961 | struct sas_task *task, *n; | |
962 | ||
d7a54e30 | 963 | kthread_stop(core->queue_thread); |
2908d778 JB |
964 | |
965 | if (!list_empty(&core->task_queue)) | |
966 | SAS_DPRINTK("HA: %llx: scsi core task queue is NOT empty!?\n", | |
967 | SAS_ADDR(sas_ha->sas_addr)); | |
968 | ||
969 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
970 | list_for_each_entry_safe(task, n, &core->task_queue, list) { | |
971 | struct scsi_cmnd *cmd = task->uldd_task; | |
972 | ||
973 | list_del_init(&task->list); | |
974 | ||
975 | ASSIGN_SAS_TASK(cmd, NULL); | |
976 | sas_free_task(task); | |
977 | cmd->result = DID_ABORT << 16; | |
978 | cmd->scsi_done(cmd); | |
979 | } | |
980 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
981 | } | |
982 | ||
396819fb DW |
983 | /* |
984 | * Call the LLDD task abort routine directly. This function is intended for | |
985 | * use by upper layers that need to tell the LLDD to abort a task. | |
986 | */ | |
987 | int __sas_task_abort(struct sas_task *task) | |
79a5eb60 | 988 | { |
79a5eb60 DW |
989 | struct sas_internal *si = |
990 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
991 | unsigned long flags; | |
992 | int res; | |
993 | ||
994 | spin_lock_irqsave(&task->task_state_lock, flags); | |
396819fb DW |
995 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED || |
996 | task->task_state_flags & SAS_TASK_STATE_DONE) { | |
79a5eb60 | 997 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
cadbd4a5 | 998 | SAS_DPRINTK("%s: Task %p already finished.\n", __func__, |
79a5eb60 DW |
999 | task); |
1000 | return 0; | |
1001 | } | |
396819fb | 1002 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
79a5eb60 DW |
1003 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
1004 | ||
1005 | if (!si->dft->lldd_abort_task) | |
1006 | return -ENODEV; | |
1007 | ||
1008 | res = si->dft->lldd_abort_task(task); | |
396819fb DW |
1009 | |
1010 | spin_lock_irqsave(&task->task_state_lock, flags); | |
79a5eb60 DW |
1011 | if ((task->task_state_flags & SAS_TASK_STATE_DONE) || |
1012 | (res == TMF_RESP_FUNC_COMPLETE)) | |
1013 | { | |
396819fb DW |
1014 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
1015 | task->task_done(task); | |
79a5eb60 DW |
1016 | return 0; |
1017 | } | |
1018 | ||
79a5eb60 DW |
1019 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) |
1020 | task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; | |
1021 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
1022 | ||
1023 | return -EAGAIN; | |
1024 | } | |
1025 | ||
396819fb DW |
1026 | /* |
1027 | * Tell an upper layer that it needs to initiate an abort for a given task. | |
1028 | * This should only ever be called by an LLDD. | |
1029 | */ | |
1030 | void sas_task_abort(struct sas_task *task) | |
79a5eb60 | 1031 | { |
396819fb | 1032 | struct scsi_cmnd *sc = task->uldd_task; |
79a5eb60 | 1033 | |
396819fb DW |
1034 | /* Escape for libsas internal commands */ |
1035 | if (!sc) { | |
1036 | if (!del_timer(&task->timer)) | |
79a5eb60 | 1037 | return; |
396819fb DW |
1038 | task->timer.function(task->timer.data); |
1039 | return; | |
1040 | } | |
79a5eb60 | 1041 | |
3a2755af DW |
1042 | if (dev_is_sata(task->dev)) { |
1043 | sas_ata_task_abort(task); | |
1044 | return; | |
1045 | } | |
1046 | ||
242f9dcb | 1047 | blk_abort_request(sc->request); |
396819fb | 1048 | scsi_schedule_eh(sc->device->host); |
79a5eb60 DW |
1049 | } |
1050 | ||
fa1c1e8f DW |
1051 | int sas_slave_alloc(struct scsi_device *scsi_dev) |
1052 | { | |
1053 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); | |
1054 | ||
1055 | if (dev_is_sata(dev)) | |
1056 | return ata_sas_port_init(dev->sata_dev.ap); | |
1057 | ||
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | void sas_target_destroy(struct scsi_target *starget) | |
1062 | { | |
1063 | struct domain_device *found_dev = sas_find_target(starget); | |
1064 | ||
1065 | if (!found_dev) | |
1066 | return; | |
1067 | ||
1068 | if (dev_is_sata(found_dev)) | |
1069 | ata_sas_port_destroy(found_dev->sata_dev.ap); | |
1070 | ||
1071 | return; | |
1072 | } | |
1073 | ||
45e6cdf4 DW |
1074 | static void sas_parse_addr(u8 *sas_addr, const char *p) |
1075 | { | |
1076 | int i; | |
1077 | for (i = 0; i < SAS_ADDR_SIZE; i++) { | |
1078 | u8 h, l; | |
1079 | if (!*p) | |
1080 | break; | |
1081 | h = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10; | |
1082 | p++; | |
1083 | l = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10; | |
1084 | p++; | |
1085 | sas_addr[i] = (h<<4) | l; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | #define SAS_STRING_ADDR_SIZE 16 | |
1090 | ||
1091 | int sas_request_addr(struct Scsi_Host *shost, u8 *addr) | |
1092 | { | |
1093 | int res; | |
1094 | const struct firmware *fw; | |
1095 | ||
1096 | res = request_firmware(&fw, "sas_addr", &shost->shost_gendev); | |
1097 | if (res) | |
1098 | return res; | |
1099 | ||
1100 | if (fw->size < SAS_STRING_ADDR_SIZE) { | |
1101 | res = -ENODEV; | |
1102 | goto out; | |
1103 | } | |
1104 | ||
1105 | sas_parse_addr(addr, fw->data); | |
1106 | ||
1107 | out: | |
1108 | release_firmware(fw); | |
1109 | return res; | |
1110 | } | |
1111 | EXPORT_SYMBOL_GPL(sas_request_addr); | |
1112 | ||
2908d778 JB |
1113 | EXPORT_SYMBOL_GPL(sas_queuecommand); |
1114 | EXPORT_SYMBOL_GPL(sas_target_alloc); | |
1115 | EXPORT_SYMBOL_GPL(sas_slave_configure); | |
1116 | EXPORT_SYMBOL_GPL(sas_slave_destroy); | |
1117 | EXPORT_SYMBOL_GPL(sas_change_queue_depth); | |
1118 | EXPORT_SYMBOL_GPL(sas_change_queue_type); | |
1119 | EXPORT_SYMBOL_GPL(sas_bios_param); | |
396819fb | 1120 | EXPORT_SYMBOL_GPL(__sas_task_abort); |
79a5eb60 | 1121 | EXPORT_SYMBOL_GPL(sas_task_abort); |
dea22214 | 1122 | EXPORT_SYMBOL_GPL(sas_phy_reset); |
acbf167d | 1123 | EXPORT_SYMBOL_GPL(sas_phy_enable); |
ad689233 | 1124 | EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler); |
a9344e68 | 1125 | EXPORT_SYMBOL_GPL(sas_eh_bus_reset_handler); |
fa1c1e8f DW |
1126 | EXPORT_SYMBOL_GPL(sas_slave_alloc); |
1127 | EXPORT_SYMBOL_GPL(sas_target_destroy); | |
1128 | EXPORT_SYMBOL_GPL(sas_ioctl); |