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