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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; | |
df64d3ca | 116 | case SAM_STAT_CHECK_CONDITION: |
2908d778 | 117 | memcpy(sc->sense_buffer, ts->buf, |
cc75e8ab | 118 | min(SCSI_SENSE_BUFFERSIZE, ts->buf_valid_size)); |
df64d3ca | 119 | stat = SAM_STAT_CHECK_CONDITION; |
2908d778 JB |
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 | ||
2908d778 JB |
133 | static struct sas_task *sas_create_task(struct scsi_cmnd *cmd, |
134 | struct domain_device *dev, | |
3cc27547 | 135 | gfp_t gfp_flags) |
2908d778 JB |
136 | { |
137 | struct sas_task *task = sas_alloc_task(gfp_flags); | |
138 | struct scsi_lun lun; | |
139 | ||
140 | if (!task) | |
141 | return NULL; | |
142 | ||
2908d778 JB |
143 | task->uldd_task = cmd; |
144 | ASSIGN_SAS_TASK(cmd, task); | |
145 | ||
146 | task->dev = dev; | |
147 | task->task_proto = task->dev->tproto; /* BUG_ON(!SSP) */ | |
148 | ||
149 | task->ssp_task.retry_count = 1; | |
150 | int_to_scsilun(cmd->device->lun, &lun); | |
151 | memcpy(task->ssp_task.LUN, &lun.scsi_lun, 8); | |
9cbbdca4 | 152 | task->ssp_task.task_attr = TASK_ATTR_SIMPLE; |
2908d778 JB |
153 | memcpy(task->ssp_task.cdb, cmd->cmnd, 16); |
154 | ||
c13e5566 FT |
155 | task->scatter = scsi_sglist(cmd); |
156 | task->num_scatter = scsi_sg_count(cmd); | |
157 | task->total_xfer_len = scsi_bufflen(cmd); | |
2908d778 JB |
158 | task->data_dir = cmd->sc_data_direction; |
159 | ||
160 | task->task_done = sas_scsi_task_done; | |
161 | ||
162 | return task; | |
163 | } | |
164 | ||
338ec570 | 165 | int sas_queue_up(struct sas_task *task) |
2908d778 JB |
166 | { |
167 | struct sas_ha_struct *sas_ha = task->dev->port->ha; | |
168 | struct scsi_core *core = &sas_ha->core; | |
169 | unsigned long flags; | |
170 | LIST_HEAD(list); | |
171 | ||
172 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
173 | if (sas_ha->lldd_queue_size < core->task_queue_size + 1) { | |
174 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
175 | return -SAS_QUEUE_FULL; | |
176 | } | |
177 | list_add_tail(&task->list, &core->task_queue); | |
178 | core->task_queue_size += 1; | |
179 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
d7a54e30 | 180 | wake_up_process(core->queue_thread); |
2908d778 JB |
181 | |
182 | return 0; | |
183 | } | |
184 | ||
185 | /** | |
186 | * sas_queuecommand -- Enqueue a command for processing | |
187 | * @parameters: See SCSI Core documentation | |
188 | * | |
189 | * Note: XXX: Remove the host unlock/lock pair when SCSI Core can | |
190 | * call us without holding an IRQ spinlock... | |
191 | */ | |
f281233d | 192 | static int sas_queuecommand_lck(struct scsi_cmnd *cmd, |
2908d778 | 193 | void (*scsi_done)(struct scsi_cmnd *)) |
8ee24023 DW |
194 | __releases(host->host_lock) |
195 | __acquires(dev->sata_dev.ap->lock) | |
196 | __releases(dev->sata_dev.ap->lock) | |
197 | __acquires(host->host_lock) | |
2908d778 JB |
198 | { |
199 | int res = 0; | |
200 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
201 | struct Scsi_Host *host = cmd->device->host; | |
202 | struct sas_internal *i = to_sas_internal(host->transportt); | |
203 | ||
204 | spin_unlock_irq(host->host_lock); | |
205 | ||
206 | { | |
207 | struct sas_ha_struct *sas_ha = dev->port->ha; | |
208 | struct sas_task *task; | |
209 | ||
fa1c1e8f | 210 | if (dev_is_sata(dev)) { |
3eb7a51a DW |
211 | unsigned long flags; |
212 | ||
213 | spin_lock_irqsave(dev->sata_dev.ap->lock, flags); | |
b27dcfb0 | 214 | res = ata_sas_queuecmd(cmd, dev->sata_dev.ap); |
3eb7a51a | 215 | spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags); |
fa1c1e8f DW |
216 | goto out; |
217 | } | |
218 | ||
56dd2c06 DW |
219 | /* If the device fell off, no sense in issuing commands */ |
220 | if (dev->gone) { | |
221 | cmd->result = DID_BAD_TARGET << 16; | |
222 | scsi_done(cmd); | |
223 | goto out; | |
224 | } | |
225 | ||
2908d778 JB |
226 | res = -ENOMEM; |
227 | task = sas_create_task(cmd, dev, GFP_ATOMIC); | |
228 | if (!task) | |
229 | goto out; | |
230 | ||
231 | cmd->scsi_done = scsi_done; | |
232 | /* Queue up, Direct Mode or Task Collector Mode. */ | |
233 | if (sas_ha->lldd_max_execute_num < 2) | |
234 | res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); | |
235 | else | |
236 | res = sas_queue_up(task); | |
237 | ||
238 | /* Examine */ | |
239 | if (res) { | |
240 | SAS_DPRINTK("lldd_execute_task returned: %d\n", res); | |
241 | ASSIGN_SAS_TASK(cmd, NULL); | |
242 | sas_free_task(task); | |
243 | if (res == -SAS_QUEUE_FULL) { | |
244 | cmd->result = DID_SOFT_ERROR << 16; /* retry */ | |
245 | res = 0; | |
246 | scsi_done(cmd); | |
247 | } | |
248 | goto out; | |
249 | } | |
250 | } | |
251 | out: | |
252 | spin_lock_irq(host->host_lock); | |
253 | return res; | |
254 | } | |
255 | ||
f281233d JG |
256 | DEF_SCSI_QCMD(sas_queuecommand) |
257 | ||
a8e14fec JB |
258 | static void sas_eh_finish_cmd(struct scsi_cmnd *cmd) |
259 | { | |
260 | struct sas_task *task = TO_SAS_TASK(cmd); | |
261 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(cmd->device->host); | |
262 | ||
263 | /* remove the aborted task flag to allow the task to be | |
264 | * completed now. At this point, we only get called following | |
265 | * an actual abort of the task, so we should be guaranteed not | |
266 | * to be racing with any completions from the LLD (hence we | |
267 | * don't need the task state lock to clear the flag) */ | |
268 | task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; | |
269 | /* Now call task_done. However, task will be free'd after | |
270 | * this */ | |
271 | task->task_done(task); | |
272 | /* now finish the command and move it on to the error | |
273 | * handler done list, this also takes it off the | |
274 | * error handler pending list */ | |
275 | scsi_eh_finish_cmd(cmd, &sas_ha->eh_done_q); | |
276 | } | |
277 | ||
2908d778 JB |
278 | static void sas_scsi_clear_queue_lu(struct list_head *error_q, struct scsi_cmnd *my_cmd) |
279 | { | |
280 | struct scsi_cmnd *cmd, *n; | |
281 | ||
282 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
63e4563b JB |
283 | if (cmd->device->sdev_target == my_cmd->device->sdev_target && |
284 | cmd->device->lun == my_cmd->device->lun) | |
a8e14fec | 285 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
286 | } |
287 | } | |
288 | ||
289 | static void sas_scsi_clear_queue_I_T(struct list_head *error_q, | |
290 | struct domain_device *dev) | |
291 | { | |
292 | struct scsi_cmnd *cmd, *n; | |
293 | ||
294 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
295 | struct domain_device *x = cmd_to_domain_dev(cmd); | |
296 | ||
297 | if (x == dev) | |
a8e14fec | 298 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
299 | } |
300 | } | |
301 | ||
302 | static void sas_scsi_clear_queue_port(struct list_head *error_q, | |
303 | struct asd_sas_port *port) | |
304 | { | |
305 | struct scsi_cmnd *cmd, *n; | |
306 | ||
307 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
308 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
309 | struct asd_sas_port *x = dev->port; | |
310 | ||
311 | if (x == port) | |
a8e14fec | 312 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
313 | } |
314 | } | |
315 | ||
316 | enum task_disposition { | |
317 | TASK_IS_DONE, | |
318 | TASK_IS_ABORTED, | |
319 | TASK_IS_AT_LU, | |
320 | TASK_IS_NOT_AT_LU, | |
02cd743b | 321 | TASK_ABORT_FAILED, |
2908d778 JB |
322 | }; |
323 | ||
324 | static enum task_disposition sas_scsi_find_task(struct sas_task *task) | |
325 | { | |
326 | struct sas_ha_struct *ha = task->dev->port->ha; | |
327 | unsigned long flags; | |
328 | int i, res; | |
329 | struct sas_internal *si = | |
330 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
331 | ||
332 | if (ha->lldd_max_execute_num > 1) { | |
333 | struct scsi_core *core = &ha->core; | |
334 | struct sas_task *t, *n; | |
335 | ||
336 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
337 | list_for_each_entry_safe(t, n, &core->task_queue, list) { | |
338 | if (task == t) { | |
339 | list_del_init(&t->list); | |
340 | spin_unlock_irqrestore(&core->task_queue_lock, | |
341 | flags); | |
342 | SAS_DPRINTK("%s: task 0x%p aborted from " | |
343 | "task_queue\n", | |
cadbd4a5 | 344 | __func__, task); |
2908d778 JB |
345 | return TASK_IS_ABORTED; |
346 | } | |
347 | } | |
348 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
349 | } | |
350 | ||
351 | for (i = 0; i < 5; i++) { | |
cadbd4a5 | 352 | SAS_DPRINTK("%s: aborting task 0x%p\n", __func__, task); |
2908d778 JB |
353 | res = si->dft->lldd_abort_task(task); |
354 | ||
355 | spin_lock_irqsave(&task->task_state_lock, flags); | |
356 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { | |
357 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
cadbd4a5 | 358 | SAS_DPRINTK("%s: task 0x%p is done\n", __func__, |
2908d778 JB |
359 | task); |
360 | return TASK_IS_DONE; | |
361 | } | |
362 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
363 | ||
364 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
365 | SAS_DPRINTK("%s: task 0x%p is aborted\n", | |
cadbd4a5 | 366 | __func__, task); |
2908d778 JB |
367 | return TASK_IS_ABORTED; |
368 | } else if (si->dft->lldd_query_task) { | |
369 | SAS_DPRINTK("%s: querying task 0x%p\n", | |
cadbd4a5 | 370 | __func__, task); |
2908d778 | 371 | res = si->dft->lldd_query_task(task); |
02cd743b DW |
372 | switch (res) { |
373 | case TMF_RESP_FUNC_SUCC: | |
2908d778 | 374 | SAS_DPRINTK("%s: task 0x%p at LU\n", |
cadbd4a5 | 375 | __func__, task); |
2908d778 | 376 | return TASK_IS_AT_LU; |
02cd743b | 377 | case TMF_RESP_FUNC_COMPLETE: |
2908d778 | 378 | SAS_DPRINTK("%s: task 0x%p not at LU\n", |
cadbd4a5 | 379 | __func__, task); |
2908d778 | 380 | return TASK_IS_NOT_AT_LU; |
02cd743b DW |
381 | case TMF_RESP_FUNC_FAILED: |
382 | SAS_DPRINTK("%s: task 0x%p failed to abort\n", | |
cadbd4a5 | 383 | __func__, task); |
02cd743b DW |
384 | return TASK_ABORT_FAILED; |
385 | } | |
386 | ||
2908d778 JB |
387 | } |
388 | } | |
389 | return res; | |
390 | } | |
391 | ||
392 | static int sas_recover_lu(struct domain_device *dev, struct scsi_cmnd *cmd) | |
393 | { | |
394 | int res = TMF_RESP_FUNC_FAILED; | |
395 | struct scsi_lun lun; | |
396 | struct sas_internal *i = | |
397 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
398 | ||
399 | int_to_scsilun(cmd->device->lun, &lun); | |
400 | ||
401 | SAS_DPRINTK("eh: device %llx LUN %x has the task\n", | |
402 | SAS_ADDR(dev->sas_addr), | |
403 | cmd->device->lun); | |
404 | ||
405 | if (i->dft->lldd_abort_task_set) | |
406 | res = i->dft->lldd_abort_task_set(dev, lun.scsi_lun); | |
407 | ||
408 | if (res == TMF_RESP_FUNC_FAILED) { | |
409 | if (i->dft->lldd_clear_task_set) | |
410 | res = i->dft->lldd_clear_task_set(dev, lun.scsi_lun); | |
411 | } | |
412 | ||
413 | if (res == TMF_RESP_FUNC_FAILED) { | |
414 | if (i->dft->lldd_lu_reset) | |
415 | res = i->dft->lldd_lu_reset(dev, lun.scsi_lun); | |
416 | } | |
417 | ||
418 | return res; | |
419 | } | |
420 | ||
421 | static int sas_recover_I_T(struct domain_device *dev) | |
422 | { | |
423 | int res = TMF_RESP_FUNC_FAILED; | |
424 | struct sas_internal *i = | |
425 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
426 | ||
427 | SAS_DPRINTK("I_T nexus reset for dev %016llx\n", | |
428 | SAS_ADDR(dev->sas_addr)); | |
429 | ||
430 | if (i->dft->lldd_I_T_nexus_reset) | |
431 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
432 | ||
433 | return res; | |
434 | } | |
435 | ||
ad689233 | 436 | /* Find the sas_phy that's attached to this device */ |
5319578c | 437 | struct sas_phy *sas_find_local_phy(struct domain_device *dev) |
3ebf6922 | 438 | { |
ad689233 DW |
439 | struct domain_device *pdev = dev->parent; |
440 | struct ex_phy *exphy = NULL; | |
441 | int i; | |
442 | ||
443 | /* Directly attached device */ | |
444 | if (!pdev) | |
445 | return dev->port->phy; | |
3ebf6922 | 446 | |
ad689233 DW |
447 | /* Otherwise look in the expander */ |
448 | for (i = 0; i < pdev->ex_dev.num_phys; i++) | |
449 | if (!memcmp(dev->sas_addr, | |
450 | pdev->ex_dev.ex_phy[i].attached_sas_addr, | |
451 | SAS_ADDR_SIZE)) { | |
452 | exphy = &pdev->ex_dev.ex_phy[i]; | |
453 | break; | |
454 | } | |
3ebf6922 | 455 | |
ad689233 DW |
456 | BUG_ON(!exphy); |
457 | return exphy->phy; | |
3ebf6922 | 458 | } |
5319578c | 459 | EXPORT_SYMBOL_GPL(sas_find_local_phy); |
3ebf6922 | 460 | |
a9344e68 | 461 | /* Attempt to send a LUN reset message to a device */ |
ad689233 | 462 | int sas_eh_device_reset_handler(struct scsi_cmnd *cmd) |
a9344e68 DW |
463 | { |
464 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
465 | struct sas_internal *i = | |
466 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
467 | struct scsi_lun lun; | |
468 | int res; | |
469 | ||
470 | int_to_scsilun(cmd->device->lun, &lun); | |
471 | ||
472 | if (!i->dft->lldd_lu_reset) | |
473 | return FAILED; | |
474 | ||
475 | res = i->dft->lldd_lu_reset(dev, lun.scsi_lun); | |
476 | if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) | |
477 | return SUCCESS; | |
478 | ||
479 | return FAILED; | |
480 | } | |
481 | ||
482 | /* Attempt to send a phy (bus) reset */ | |
483 | int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd) | |
ad689233 DW |
484 | { |
485 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
5319578c | 486 | struct sas_phy *phy = sas_find_local_phy(dev); |
ad689233 DW |
487 | int res; |
488 | ||
489 | res = sas_phy_reset(phy, 1); | |
490 | if (res) | |
a9344e68 | 491 | SAS_DPRINTK("Bus reset of %s failed 0x%x\n", |
af5ca3f4 | 492 | kobject_name(&phy->dev.kobj), |
ad689233 DW |
493 | res); |
494 | if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) | |
495 | return SUCCESS; | |
496 | ||
497 | return FAILED; | |
498 | } | |
499 | ||
500 | /* Try to reset a device */ | |
8de3ef25 | 501 | static int try_to_reset_cmd_device(struct scsi_cmnd *cmd) |
ad689233 | 502 | { |
a9344e68 | 503 | int res; |
8de3ef25 | 504 | struct Scsi_Host *shost = cmd->device->host; |
a9344e68 | 505 | |
ad689233 | 506 | if (!shost->hostt->eh_device_reset_handler) |
a9344e68 DW |
507 | goto try_bus_reset; |
508 | ||
509 | res = shost->hostt->eh_device_reset_handler(cmd); | |
510 | if (res == SUCCESS) | |
511 | return res; | |
ad689233 | 512 | |
a9344e68 DW |
513 | try_bus_reset: |
514 | if (shost->hostt->eh_bus_reset_handler) | |
515 | return shost->hostt->eh_bus_reset_handler(cmd); | |
516 | ||
517 | return FAILED; | |
ad689233 DW |
518 | } |
519 | ||
520 | static int sas_eh_handle_sas_errors(struct Scsi_Host *shost, | |
521 | struct list_head *work_q, | |
522 | struct list_head *done_q) | |
2908d778 | 523 | { |
2908d778 JB |
524 | struct scsi_cmnd *cmd, *n; |
525 | enum task_disposition res = TASK_IS_DONE; | |
3ebf6922 | 526 | int tmf_resp, need_reset; |
2908d778 | 527 | struct sas_internal *i = to_sas_internal(shost->transportt); |
ad689233 DW |
528 | unsigned long flags; |
529 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
2908d778 | 530 | |
2908d778 | 531 | Again: |
ad689233 | 532 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
2908d778 JB |
533 | struct sas_task *task = TO_SAS_TASK(cmd); |
534 | ||
ad689233 | 535 | if (!task) |
f456393e | 536 | continue; |
ad689233 DW |
537 | |
538 | list_del_init(&cmd->eh_entry); | |
3ebf6922 DW |
539 | |
540 | spin_lock_irqsave(&task->task_state_lock, flags); | |
541 | need_reset = task->task_state_flags & SAS_TASK_NEED_DEV_RESET; | |
3ebf6922 DW |
542 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
543 | ||
8de3ef25 JB |
544 | if (need_reset) { |
545 | SAS_DPRINTK("%s: task 0x%p requests reset\n", | |
cadbd4a5 | 546 | __func__, task); |
8de3ef25 JB |
547 | goto reset; |
548 | } | |
549 | ||
2908d778 | 550 | SAS_DPRINTK("trying to find task 0x%p\n", task); |
2908d778 JB |
551 | res = sas_scsi_find_task(task); |
552 | ||
553 | cmd->eh_eflags = 0; | |
2908d778 JB |
554 | |
555 | switch (res) { | |
556 | case TASK_IS_DONE: | |
cadbd4a5 | 557 | SAS_DPRINTK("%s: task 0x%p is done\n", __func__, |
2908d778 | 558 | task); |
a8e14fec | 559 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
560 | continue; |
561 | case TASK_IS_ABORTED: | |
562 | SAS_DPRINTK("%s: task 0x%p is aborted\n", | |
cadbd4a5 | 563 | __func__, task); |
a8e14fec | 564 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
565 | continue; |
566 | case TASK_IS_AT_LU: | |
567 | SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task); | |
8de3ef25 | 568 | reset: |
2908d778 JB |
569 | tmf_resp = sas_recover_lu(task->dev, cmd); |
570 | if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { | |
571 | SAS_DPRINTK("dev %016llx LU %x is " | |
572 | "recovered\n", | |
573 | SAS_ADDR(task->dev), | |
574 | cmd->device->lun); | |
a8e14fec | 575 | sas_eh_finish_cmd(cmd); |
ad689233 | 576 | sas_scsi_clear_queue_lu(work_q, cmd); |
2908d778 JB |
577 | goto Again; |
578 | } | |
579 | /* fallthrough */ | |
580 | case TASK_IS_NOT_AT_LU: | |
02cd743b | 581 | case TASK_ABORT_FAILED: |
2908d778 JB |
582 | SAS_DPRINTK("task 0x%p is not at LU: I_T recover\n", |
583 | task); | |
584 | tmf_resp = sas_recover_I_T(task->dev); | |
585 | if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { | |
8de3ef25 | 586 | struct domain_device *dev = task->dev; |
2908d778 JB |
587 | SAS_DPRINTK("I_T %016llx recovered\n", |
588 | SAS_ADDR(task->dev->sas_addr)); | |
a8e14fec | 589 | sas_eh_finish_cmd(cmd); |
8de3ef25 | 590 | sas_scsi_clear_queue_I_T(work_q, dev); |
2908d778 JB |
591 | goto Again; |
592 | } | |
593 | /* Hammer time :-) */ | |
8de3ef25 | 594 | try_to_reset_cmd_device(cmd); |
2908d778 JB |
595 | if (i->dft->lldd_clear_nexus_port) { |
596 | struct asd_sas_port *port = task->dev->port; | |
597 | SAS_DPRINTK("clearing nexus for port:%d\n", | |
598 | port->id); | |
599 | res = i->dft->lldd_clear_nexus_port(port); | |
600 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
601 | SAS_DPRINTK("clear nexus port:%d " | |
602 | "succeeded\n", port->id); | |
a8e14fec | 603 | sas_eh_finish_cmd(cmd); |
ad689233 | 604 | sas_scsi_clear_queue_port(work_q, |
2908d778 JB |
605 | port); |
606 | goto Again; | |
607 | } | |
608 | } | |
609 | if (i->dft->lldd_clear_nexus_ha) { | |
610 | SAS_DPRINTK("clear nexus ha\n"); | |
611 | res = i->dft->lldd_clear_nexus_ha(ha); | |
612 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
613 | SAS_DPRINTK("clear nexus ha " | |
614 | "succeeded\n"); | |
a8e14fec | 615 | sas_eh_finish_cmd(cmd); |
a8e14fec | 616 | goto clear_q; |
2908d778 JB |
617 | } |
618 | } | |
619 | /* If we are here -- this means that no amount | |
620 | * of effort could recover from errors. Quite | |
621 | * possibly the HA just disappeared. | |
622 | */ | |
623 | SAS_DPRINTK("error from device %llx, LUN %x " | |
624 | "couldn't be recovered in any way\n", | |
625 | SAS_ADDR(task->dev->sas_addr), | |
626 | cmd->device->lun); | |
627 | ||
a8e14fec | 628 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
629 | goto clear_q; |
630 | } | |
631 | } | |
ad689233 | 632 | return list_empty(work_q); |
2908d778 | 633 | clear_q: |
cadbd4a5 | 634 | SAS_DPRINTK("--- Exit %s -- clear_q\n", __func__); |
a8e14fec JB |
635 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) |
636 | sas_eh_finish_cmd(cmd); | |
637 | ||
ad689233 DW |
638 | return list_empty(work_q); |
639 | } | |
640 | ||
641 | void sas_scsi_recover_host(struct Scsi_Host *shost) | |
642 | { | |
643 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
644 | unsigned long flags; | |
645 | LIST_HEAD(eh_work_q); | |
646 | ||
647 | spin_lock_irqsave(shost->host_lock, flags); | |
648 | list_splice_init(&shost->eh_cmd_q, &eh_work_q); | |
9ee91f7f | 649 | shost->host_eh_scheduled = 0; |
ad689233 DW |
650 | spin_unlock_irqrestore(shost->host_lock, flags); |
651 | ||
cadbd4a5 | 652 | SAS_DPRINTK("Enter %s\n", __func__); |
ad689233 DW |
653 | /* |
654 | * Deal with commands that still have SAS tasks (i.e. they didn't | |
655 | * complete via the normal sas_task completion mechanism) | |
656 | */ | |
657 | if (sas_eh_handle_sas_errors(shost, &eh_work_q, &ha->eh_done_q)) | |
658 | goto out; | |
659 | ||
660 | /* | |
661 | * Now deal with SCSI commands that completed ok but have a an error | |
662 | * code (and hopefully sense data) attached. This is roughly what | |
663 | * scsi_unjam_host does, but we skip scsi_eh_abort_cmds because any | |
664 | * command we see here has no sas_task and is thus unknown to the HA. | |
665 | */ | |
666 | if (!scsi_eh_get_sense(&eh_work_q, &ha->eh_done_q)) | |
667 | scsi_eh_ready_devs(shost, &eh_work_q, &ha->eh_done_q); | |
668 | ||
669 | out: | |
670 | scsi_eh_flush_done_q(&ha->eh_done_q); | |
cadbd4a5 | 671 | SAS_DPRINTK("--- Exit %s\n", __func__); |
ad689233 | 672 | return; |
2908d778 JB |
673 | } |
674 | ||
242f9dcb | 675 | enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd) |
2908d778 JB |
676 | { |
677 | struct sas_task *task = TO_SAS_TASK(cmd); | |
678 | unsigned long flags; | |
679 | ||
680 | if (!task) { | |
242f9dcb | 681 | cmd->request->timeout /= 2; |
6d4dcd4d | 682 | SAS_DPRINTK("command 0x%p, task 0x%p, gone: %s\n", |
242f9dcb JA |
683 | cmd, task, (cmd->request->timeout ? |
684 | "BLK_EH_RESET_TIMER" : "BLK_EH_NOT_HANDLED")); | |
685 | if (!cmd->request->timeout) | |
686 | return BLK_EH_NOT_HANDLED; | |
687 | return BLK_EH_RESET_TIMER; | |
2908d778 JB |
688 | } |
689 | ||
690 | spin_lock_irqsave(&task->task_state_lock, flags); | |
396819fb | 691 | BUG_ON(task->task_state_flags & SAS_TASK_STATE_ABORTED); |
2908d778 JB |
692 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { |
693 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
242f9dcb JA |
694 | SAS_DPRINTK("command 0x%p, task 0x%p, timed out: " |
695 | "BLK_EH_HANDLED\n", cmd, task); | |
696 | return BLK_EH_HANDLED; | |
2908d778 | 697 | } |
b218a0d8 DW |
698 | if (!(task->task_state_flags & SAS_TASK_AT_INITIATOR)) { |
699 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
700 | SAS_DPRINTK("command 0x%p, task 0x%p, not at initiator: " | |
242f9dcb | 701 | "BLK_EH_RESET_TIMER\n", |
b218a0d8 | 702 | cmd, task); |
242f9dcb | 703 | return BLK_EH_RESET_TIMER; |
b218a0d8 | 704 | } |
2908d778 JB |
705 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
706 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
707 | ||
242f9dcb | 708 | SAS_DPRINTK("command 0x%p, task 0x%p, timed out: BLK_EH_NOT_HANDLED\n", |
2908d778 JB |
709 | cmd, task); |
710 | ||
242f9dcb | 711 | return BLK_EH_NOT_HANDLED; |
2908d778 JB |
712 | } |
713 | ||
fa1c1e8f DW |
714 | int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg) |
715 | { | |
716 | struct domain_device *dev = sdev_to_domain_dev(sdev); | |
717 | ||
718 | if (dev_is_sata(dev)) | |
94be9a58 | 719 | return ata_sas_scsi_ioctl(dev->sata_dev.ap, sdev, cmd, arg); |
fa1c1e8f DW |
720 | |
721 | return -EINVAL; | |
722 | } | |
723 | ||
2908d778 JB |
724 | struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy) |
725 | { | |
726 | struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent); | |
727 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
728 | struct domain_device *found_dev = NULL; | |
729 | int i; | |
980fa2f9 | 730 | unsigned long flags; |
2908d778 | 731 | |
980fa2f9 | 732 | spin_lock_irqsave(&ha->phy_port_lock, flags); |
2908d778 JB |
733 | for (i = 0; i < ha->num_phys; i++) { |
734 | struct asd_sas_port *port = ha->sas_port[i]; | |
735 | struct domain_device *dev; | |
736 | ||
737 | spin_lock(&port->dev_list_lock); | |
738 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
739 | if (rphy == dev->rphy) { | |
740 | found_dev = dev; | |
741 | spin_unlock(&port->dev_list_lock); | |
742 | goto found; | |
743 | } | |
744 | } | |
745 | spin_unlock(&port->dev_list_lock); | |
746 | } | |
747 | found: | |
980fa2f9 | 748 | spin_unlock_irqrestore(&ha->phy_port_lock, flags); |
2908d778 JB |
749 | |
750 | return found_dev; | |
751 | } | |
752 | ||
753 | static inline struct domain_device *sas_find_target(struct scsi_target *starget) | |
754 | { | |
755 | struct sas_rphy *rphy = dev_to_rphy(starget->dev.parent); | |
756 | ||
757 | return sas_find_dev_by_rphy(rphy); | |
758 | } | |
759 | ||
760 | int sas_target_alloc(struct scsi_target *starget) | |
761 | { | |
762 | struct domain_device *found_dev = sas_find_target(starget); | |
338ec570 | 763 | int res; |
2908d778 JB |
764 | |
765 | if (!found_dev) | |
766 | return -ENODEV; | |
767 | ||
fa1c1e8f | 768 | if (dev_is_sata(found_dev)) { |
338ec570 DW |
769 | res = sas_ata_init_host_and_port(found_dev, starget); |
770 | if (res) | |
771 | return res; | |
fa1c1e8f DW |
772 | } |
773 | ||
2908d778 JB |
774 | starget->hostdata = found_dev; |
775 | return 0; | |
776 | } | |
777 | ||
778 | #define SAS_DEF_QD 32 | |
779 | #define SAS_MAX_QD 64 | |
780 | ||
781 | int sas_slave_configure(struct scsi_device *scsi_dev) | |
782 | { | |
783 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); | |
784 | struct sas_ha_struct *sas_ha; | |
785 | ||
786 | BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE); | |
787 | ||
fa1c1e8f DW |
788 | if (dev_is_sata(dev)) { |
789 | ata_sas_slave_configure(scsi_dev, dev->sata_dev.ap); | |
790 | return 0; | |
791 | } | |
792 | ||
2908d778 JB |
793 | sas_ha = dev->port->ha; |
794 | ||
795 | sas_read_port_mode_page(scsi_dev); | |
796 | ||
797 | if (scsi_dev->tagged_supported) { | |
798 | scsi_set_tag_type(scsi_dev, MSG_SIMPLE_TAG); | |
799 | scsi_activate_tcq(scsi_dev, SAS_DEF_QD); | |
800 | } else { | |
801 | SAS_DPRINTK("device %llx, LUN %x doesn't support " | |
802 | "TCQ\n", SAS_ADDR(dev->sas_addr), | |
803 | scsi_dev->lun); | |
804 | scsi_dev->tagged_supported = 0; | |
805 | scsi_set_tag_type(scsi_dev, 0); | |
806 | scsi_deactivate_tcq(scsi_dev, 1); | |
807 | } | |
808 | ||
f27708fc DW |
809 | scsi_dev->allow_restart = 1; |
810 | ||
2908d778 JB |
811 | return 0; |
812 | } | |
813 | ||
814 | void sas_slave_destroy(struct scsi_device *scsi_dev) | |
815 | { | |
fa1c1e8f DW |
816 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); |
817 | ||
818 | if (dev_is_sata(dev)) | |
3e4ec344 | 819 | dev->sata_dev.ap->link.device[0].class = ATA_DEV_NONE; |
2908d778 JB |
820 | } |
821 | ||
e881a172 MC |
822 | int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth, |
823 | int reason) | |
2908d778 JB |
824 | { |
825 | int res = min(new_depth, SAS_MAX_QD); | |
826 | ||
e881a172 MC |
827 | if (reason != SCSI_QDEPTH_DEFAULT) |
828 | return -EOPNOTSUPP; | |
829 | ||
2908d778 JB |
830 | if (scsi_dev->tagged_supported) |
831 | scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), | |
832 | res); | |
833 | else { | |
834 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); | |
835 | sas_printk("device %llx LUN %x queue depth changed to 1\n", | |
836 | SAS_ADDR(dev->sas_addr), | |
837 | scsi_dev->lun); | |
838 | scsi_adjust_queue_depth(scsi_dev, 0, 1); | |
839 | res = 1; | |
840 | } | |
841 | ||
842 | return res; | |
843 | } | |
844 | ||
845 | int sas_change_queue_type(struct scsi_device *scsi_dev, int qt) | |
846 | { | |
847 | if (!scsi_dev->tagged_supported) | |
848 | return 0; | |
849 | ||
850 | scsi_deactivate_tcq(scsi_dev, 1); | |
851 | ||
852 | scsi_set_tag_type(scsi_dev, qt); | |
853 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); | |
854 | ||
855 | return qt; | |
856 | } | |
857 | ||
858 | int sas_bios_param(struct scsi_device *scsi_dev, | |
859 | struct block_device *bdev, | |
860 | sector_t capacity, int *hsc) | |
861 | { | |
862 | hsc[0] = 255; | |
863 | hsc[1] = 63; | |
864 | sector_div(capacity, 255*63); | |
865 | hsc[2] = capacity; | |
866 | ||
867 | return 0; | |
868 | } | |
869 | ||
870 | /* ---------- Task Collector Thread implementation ---------- */ | |
871 | ||
872 | static void sas_queue(struct sas_ha_struct *sas_ha) | |
873 | { | |
874 | struct scsi_core *core = &sas_ha->core; | |
875 | unsigned long flags; | |
876 | LIST_HEAD(q); | |
877 | int can_queue; | |
878 | int res; | |
879 | struct sas_internal *i = to_sas_internal(core->shost->transportt); | |
880 | ||
881 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
d7a54e30 | 882 | while (!kthread_should_stop() && |
2908d778 JB |
883 | !list_empty(&core->task_queue)) { |
884 | ||
885 | can_queue = sas_ha->lldd_queue_size - core->task_queue_size; | |
886 | if (can_queue >= 0) { | |
887 | can_queue = core->task_queue_size; | |
888 | list_splice_init(&core->task_queue, &q); | |
889 | } else { | |
890 | struct list_head *a, *n; | |
891 | ||
892 | can_queue = sas_ha->lldd_queue_size; | |
893 | list_for_each_safe(a, n, &core->task_queue) { | |
894 | list_move_tail(a, &q); | |
895 | if (--can_queue == 0) | |
896 | break; | |
897 | } | |
898 | can_queue = sas_ha->lldd_queue_size; | |
899 | } | |
900 | core->task_queue_size -= can_queue; | |
901 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
902 | { | |
903 | struct sas_task *task = list_entry(q.next, | |
904 | struct sas_task, | |
905 | list); | |
906 | list_del_init(&q); | |
907 | res = i->dft->lldd_execute_task(task, can_queue, | |
908 | GFP_KERNEL); | |
909 | if (unlikely(res)) | |
910 | __list_add(&q, task->list.prev, &task->list); | |
911 | } | |
912 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
913 | if (res) { | |
914 | list_splice_init(&q, &core->task_queue); /*at head*/ | |
915 | core->task_queue_size += can_queue; | |
916 | } | |
917 | } | |
918 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
919 | } | |
920 | ||
2908d778 JB |
921 | /** |
922 | * sas_queue_thread -- The Task Collector thread | |
923 | * @_sas_ha: pointer to struct sas_ha | |
924 | */ | |
925 | static int sas_queue_thread(void *_sas_ha) | |
926 | { | |
927 | struct sas_ha_struct *sas_ha = _sas_ha; | |
2908d778 | 928 | |
2908d778 | 929 | while (1) { |
d7a54e30 CH |
930 | set_current_state(TASK_INTERRUPTIBLE); |
931 | schedule(); | |
2908d778 | 932 | sas_queue(sas_ha); |
d7a54e30 | 933 | if (kthread_should_stop()) |
2908d778 JB |
934 | break; |
935 | } | |
936 | ||
2908d778 JB |
937 | return 0; |
938 | } | |
939 | ||
940 | int sas_init_queue(struct sas_ha_struct *sas_ha) | |
941 | { | |
2908d778 JB |
942 | struct scsi_core *core = &sas_ha->core; |
943 | ||
944 | spin_lock_init(&core->task_queue_lock); | |
945 | core->task_queue_size = 0; | |
946 | INIT_LIST_HEAD(&core->task_queue); | |
2908d778 | 947 | |
d7a54e30 CH |
948 | core->queue_thread = kthread_run(sas_queue_thread, sas_ha, |
949 | "sas_queue_%d", core->shost->host_no); | |
950 | if (IS_ERR(core->queue_thread)) | |
951 | return PTR_ERR(core->queue_thread); | |
952 | return 0; | |
2908d778 JB |
953 | } |
954 | ||
955 | void sas_shutdown_queue(struct sas_ha_struct *sas_ha) | |
956 | { | |
957 | unsigned long flags; | |
958 | struct scsi_core *core = &sas_ha->core; | |
959 | struct sas_task *task, *n; | |
960 | ||
d7a54e30 | 961 | kthread_stop(core->queue_thread); |
2908d778 JB |
962 | |
963 | if (!list_empty(&core->task_queue)) | |
964 | SAS_DPRINTK("HA: %llx: scsi core task queue is NOT empty!?\n", | |
965 | SAS_ADDR(sas_ha->sas_addr)); | |
966 | ||
967 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
968 | list_for_each_entry_safe(task, n, &core->task_queue, list) { | |
969 | struct scsi_cmnd *cmd = task->uldd_task; | |
970 | ||
971 | list_del_init(&task->list); | |
972 | ||
973 | ASSIGN_SAS_TASK(cmd, NULL); | |
974 | sas_free_task(task); | |
975 | cmd->result = DID_ABORT << 16; | |
976 | cmd->scsi_done(cmd); | |
977 | } | |
978 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
979 | } | |
980 | ||
396819fb DW |
981 | /* |
982 | * Call the LLDD task abort routine directly. This function is intended for | |
983 | * use by upper layers that need to tell the LLDD to abort a task. | |
984 | */ | |
985 | int __sas_task_abort(struct sas_task *task) | |
79a5eb60 | 986 | { |
79a5eb60 DW |
987 | struct sas_internal *si = |
988 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
989 | unsigned long flags; | |
990 | int res; | |
991 | ||
992 | spin_lock_irqsave(&task->task_state_lock, flags); | |
396819fb DW |
993 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED || |
994 | task->task_state_flags & SAS_TASK_STATE_DONE) { | |
79a5eb60 | 995 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
cadbd4a5 | 996 | SAS_DPRINTK("%s: Task %p already finished.\n", __func__, |
79a5eb60 DW |
997 | task); |
998 | return 0; | |
999 | } | |
396819fb | 1000 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
79a5eb60 DW |
1001 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
1002 | ||
1003 | if (!si->dft->lldd_abort_task) | |
1004 | return -ENODEV; | |
1005 | ||
1006 | res = si->dft->lldd_abort_task(task); | |
396819fb DW |
1007 | |
1008 | spin_lock_irqsave(&task->task_state_lock, flags); | |
79a5eb60 DW |
1009 | if ((task->task_state_flags & SAS_TASK_STATE_DONE) || |
1010 | (res == TMF_RESP_FUNC_COMPLETE)) | |
1011 | { | |
396819fb DW |
1012 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
1013 | task->task_done(task); | |
79a5eb60 DW |
1014 | return 0; |
1015 | } | |
1016 | ||
79a5eb60 DW |
1017 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) |
1018 | task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; | |
1019 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
1020 | ||
1021 | return -EAGAIN; | |
1022 | } | |
1023 | ||
396819fb DW |
1024 | /* |
1025 | * Tell an upper layer that it needs to initiate an abort for a given task. | |
1026 | * This should only ever be called by an LLDD. | |
1027 | */ | |
1028 | void sas_task_abort(struct sas_task *task) | |
79a5eb60 | 1029 | { |
396819fb | 1030 | struct scsi_cmnd *sc = task->uldd_task; |
79a5eb60 | 1031 | |
396819fb DW |
1032 | /* Escape for libsas internal commands */ |
1033 | if (!sc) { | |
1034 | if (!del_timer(&task->timer)) | |
79a5eb60 | 1035 | return; |
396819fb DW |
1036 | task->timer.function(task->timer.data); |
1037 | return; | |
1038 | } | |
79a5eb60 | 1039 | |
3a2755af DW |
1040 | if (dev_is_sata(task->dev)) { |
1041 | sas_ata_task_abort(task); | |
1b4d0d8e JB |
1042 | } else { |
1043 | struct request_queue *q = sc->device->request_queue; | |
1044 | unsigned long flags; | |
3a2755af | 1045 | |
1b4d0d8e JB |
1046 | spin_lock_irqsave(q->queue_lock, flags); |
1047 | blk_abort_request(sc->request); | |
1048 | spin_unlock_irqrestore(q->queue_lock, flags); | |
1049 | scsi_schedule_eh(sc->device->host); | |
1050 | } | |
79a5eb60 DW |
1051 | } |
1052 | ||
fa1c1e8f DW |
1053 | int sas_slave_alloc(struct scsi_device *scsi_dev) |
1054 | { | |
1055 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); | |
1056 | ||
1057 | if (dev_is_sata(dev)) | |
1058 | return ata_sas_port_init(dev->sata_dev.ap); | |
1059 | ||
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | void sas_target_destroy(struct scsi_target *starget) | |
1064 | { | |
1065 | struct domain_device *found_dev = sas_find_target(starget); | |
1066 | ||
1067 | if (!found_dev) | |
1068 | return; | |
1069 | ||
1070 | if (dev_is_sata(found_dev)) | |
1071 | ata_sas_port_destroy(found_dev->sata_dev.ap); | |
1072 | ||
1073 | return; | |
1074 | } | |
1075 | ||
45e6cdf4 DW |
1076 | static void sas_parse_addr(u8 *sas_addr, const char *p) |
1077 | { | |
1078 | int i; | |
1079 | for (i = 0; i < SAS_ADDR_SIZE; i++) { | |
1080 | u8 h, l; | |
1081 | if (!*p) | |
1082 | break; | |
1083 | h = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10; | |
1084 | p++; | |
1085 | l = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10; | |
1086 | p++; | |
1087 | sas_addr[i] = (h<<4) | l; | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | #define SAS_STRING_ADDR_SIZE 16 | |
1092 | ||
1093 | int sas_request_addr(struct Scsi_Host *shost, u8 *addr) | |
1094 | { | |
1095 | int res; | |
1096 | const struct firmware *fw; | |
1097 | ||
1098 | res = request_firmware(&fw, "sas_addr", &shost->shost_gendev); | |
1099 | if (res) | |
1100 | return res; | |
1101 | ||
1102 | if (fw->size < SAS_STRING_ADDR_SIZE) { | |
1103 | res = -ENODEV; | |
1104 | goto out; | |
1105 | } | |
1106 | ||
1107 | sas_parse_addr(addr, fw->data); | |
1108 | ||
1109 | out: | |
1110 | release_firmware(fw); | |
1111 | return res; | |
1112 | } | |
1113 | EXPORT_SYMBOL_GPL(sas_request_addr); | |
1114 | ||
2908d778 JB |
1115 | EXPORT_SYMBOL_GPL(sas_queuecommand); |
1116 | EXPORT_SYMBOL_GPL(sas_target_alloc); | |
1117 | EXPORT_SYMBOL_GPL(sas_slave_configure); | |
1118 | EXPORT_SYMBOL_GPL(sas_slave_destroy); | |
1119 | EXPORT_SYMBOL_GPL(sas_change_queue_depth); | |
1120 | EXPORT_SYMBOL_GPL(sas_change_queue_type); | |
1121 | EXPORT_SYMBOL_GPL(sas_bios_param); | |
396819fb | 1122 | EXPORT_SYMBOL_GPL(__sas_task_abort); |
79a5eb60 | 1123 | EXPORT_SYMBOL_GPL(sas_task_abort); |
dea22214 | 1124 | EXPORT_SYMBOL_GPL(sas_phy_reset); |
acbf167d | 1125 | EXPORT_SYMBOL_GPL(sas_phy_enable); |
ad689233 | 1126 | EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler); |
a9344e68 | 1127 | EXPORT_SYMBOL_GPL(sas_eh_bus_reset_handler); |
fa1c1e8f DW |
1128 | EXPORT_SYMBOL_GPL(sas_slave_alloc); |
1129 | EXPORT_SYMBOL_GPL(sas_target_destroy); | |
1130 | EXPORT_SYMBOL_GPL(sas_ioctl); |