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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 | 27 | #include <linux/firmware.h> |
09703660 | 28 | #include <linux/export.h> |
45e6cdf4 | 29 | #include <linux/ctype.h> |
d7a54e30 | 30 | |
2908d778 JB |
31 | #include "sas_internal.h" |
32 | ||
33 | #include <scsi/scsi_host.h> | |
34 | #include <scsi/scsi_device.h> | |
35 | #include <scsi/scsi_tcq.h> | |
36 | #include <scsi/scsi.h> | |
f456393e | 37 | #include <scsi/scsi_eh.h> |
2908d778 JB |
38 | #include <scsi/scsi_transport.h> |
39 | #include <scsi/scsi_transport_sas.h> | |
338ec570 | 40 | #include <scsi/sas_ata.h> |
2908d778 | 41 | #include "../scsi_sas_internal.h" |
79a5eb60 | 42 | #include "../scsi_transport_api.h" |
ad689233 | 43 | #include "../scsi_priv.h" |
2908d778 JB |
44 | |
45 | #include <linux/err.h> | |
46 | #include <linux/blkdev.h> | |
83144186 | 47 | #include <linux/freezer.h> |
5a0e3ad6 | 48 | #include <linux/gfp.h> |
2908d778 | 49 | #include <linux/scatterlist.h> |
fa1c1e8f | 50 | #include <linux/libata.h> |
2908d778 | 51 | |
a3a14252 DW |
52 | /* record final status and free the task */ |
53 | static void sas_end_task(struct scsi_cmnd *sc, struct sas_task *task) | |
2908d778 JB |
54 | { |
55 | struct task_status_struct *ts = &task->task_status; | |
2908d778 JB |
56 | int hs = 0, stat = 0; |
57 | ||
2908d778 JB |
58 | if (ts->resp == SAS_TASK_UNDELIVERED) { |
59 | /* transport error */ | |
60 | hs = DID_NO_CONNECT; | |
61 | } else { /* ts->resp == SAS_TASK_COMPLETE */ | |
62 | /* task delivered, what happened afterwards? */ | |
63 | switch (ts->stat) { | |
64 | case SAS_DEV_NO_RESPONSE: | |
65 | case SAS_INTERRUPTED: | |
66 | case SAS_PHY_DOWN: | |
67 | case SAS_NAK_R_ERR: | |
68 | case SAS_OPEN_TO: | |
69 | hs = DID_NO_CONNECT; | |
70 | break; | |
71 | case SAS_DATA_UNDERRUN: | |
c13e5566 FT |
72 | scsi_set_resid(sc, ts->residual); |
73 | if (scsi_bufflen(sc) - scsi_get_resid(sc) < sc->underflow) | |
2908d778 JB |
74 | hs = DID_ERROR; |
75 | break; | |
76 | case SAS_DATA_OVERRUN: | |
77 | hs = DID_ERROR; | |
78 | break; | |
79 | case SAS_QUEUE_FULL: | |
80 | hs = DID_SOFT_ERROR; /* retry */ | |
81 | break; | |
82 | case SAS_DEVICE_UNKNOWN: | |
83 | hs = DID_BAD_TARGET; | |
84 | break; | |
85 | case SAS_SG_ERR: | |
86 | hs = DID_PARITY; | |
87 | break; | |
88 | case SAS_OPEN_REJECT: | |
89 | if (ts->open_rej_reason == SAS_OREJ_RSVD_RETRY) | |
90 | hs = DID_SOFT_ERROR; /* retry */ | |
91 | else | |
92 | hs = DID_ERROR; | |
93 | break; | |
94 | case SAS_PROTO_RESPONSE: | |
95 | SAS_DPRINTK("LLDD:%s sent SAS_PROTO_RESP for an SSP " | |
96 | "task; please report this\n", | |
97 | task->dev->port->ha->sas_ha_name); | |
98 | break; | |
99 | case SAS_ABORTED_TASK: | |
100 | hs = DID_ABORT; | |
101 | break; | |
df64d3ca | 102 | case SAM_STAT_CHECK_CONDITION: |
2908d778 | 103 | memcpy(sc->sense_buffer, ts->buf, |
cc75e8ab | 104 | min(SCSI_SENSE_BUFFERSIZE, ts->buf_valid_size)); |
df64d3ca | 105 | stat = SAM_STAT_CHECK_CONDITION; |
2908d778 JB |
106 | break; |
107 | default: | |
108 | stat = ts->stat; | |
109 | break; | |
110 | } | |
111 | } | |
a3a14252 | 112 | |
2908d778 | 113 | sc->result = (hs << 16) | stat; |
a3a14252 | 114 | ASSIGN_SAS_TASK(sc, NULL); |
2908d778 JB |
115 | list_del_init(&task->list); |
116 | sas_free_task(task); | |
a3a14252 DW |
117 | } |
118 | ||
119 | static void sas_scsi_task_done(struct sas_task *task) | |
120 | { | |
121 | struct scsi_cmnd *sc = task->uldd_task; | |
122 | ||
123 | if (unlikely(task->task_state_flags & SAS_TASK_STATE_ABORTED)) { | |
124 | /* Aborted tasks will be completed by the error handler */ | |
125 | SAS_DPRINTK("task done but aborted\n"); | |
126 | return; | |
127 | } | |
128 | ||
129 | if (unlikely(!sc)) { | |
130 | SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n"); | |
131 | list_del_init(&task->list); | |
132 | sas_free_task(task); | |
133 | return; | |
134 | } | |
135 | ||
136 | ASSIGN_SAS_TASK(sc, NULL); | |
137 | sas_end_task(sc, task); | |
a8e14fec | 138 | sc->scsi_done(sc); |
2908d778 JB |
139 | } |
140 | ||
2908d778 JB |
141 | static struct sas_task *sas_create_task(struct scsi_cmnd *cmd, |
142 | struct domain_device *dev, | |
3cc27547 | 143 | gfp_t gfp_flags) |
2908d778 JB |
144 | { |
145 | struct sas_task *task = sas_alloc_task(gfp_flags); | |
146 | struct scsi_lun lun; | |
147 | ||
148 | if (!task) | |
149 | return NULL; | |
150 | ||
2908d778 JB |
151 | task->uldd_task = cmd; |
152 | ASSIGN_SAS_TASK(cmd, task); | |
153 | ||
154 | task->dev = dev; | |
155 | task->task_proto = task->dev->tproto; /* BUG_ON(!SSP) */ | |
156 | ||
157 | task->ssp_task.retry_count = 1; | |
158 | int_to_scsilun(cmd->device->lun, &lun); | |
159 | memcpy(task->ssp_task.LUN, &lun.scsi_lun, 8); | |
9cbbdca4 | 160 | task->ssp_task.task_attr = TASK_ATTR_SIMPLE; |
2908d778 JB |
161 | memcpy(task->ssp_task.cdb, cmd->cmnd, 16); |
162 | ||
c13e5566 FT |
163 | task->scatter = scsi_sglist(cmd); |
164 | task->num_scatter = scsi_sg_count(cmd); | |
165 | task->total_xfer_len = scsi_bufflen(cmd); | |
2908d778 JB |
166 | task->data_dir = cmd->sc_data_direction; |
167 | ||
168 | task->task_done = sas_scsi_task_done; | |
169 | ||
170 | return task; | |
171 | } | |
172 | ||
338ec570 | 173 | int sas_queue_up(struct sas_task *task) |
2908d778 JB |
174 | { |
175 | struct sas_ha_struct *sas_ha = task->dev->port->ha; | |
176 | struct scsi_core *core = &sas_ha->core; | |
177 | unsigned long flags; | |
178 | LIST_HEAD(list); | |
179 | ||
180 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
181 | if (sas_ha->lldd_queue_size < core->task_queue_size + 1) { | |
182 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
183 | return -SAS_QUEUE_FULL; | |
184 | } | |
185 | list_add_tail(&task->list, &core->task_queue); | |
186 | core->task_queue_size += 1; | |
187 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
d7a54e30 | 188 | wake_up_process(core->queue_thread); |
2908d778 JB |
189 | |
190 | return 0; | |
191 | } | |
192 | ||
92bd401b | 193 | int sas_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) |
2908d778 | 194 | { |
2908d778 | 195 | struct sas_internal *i = to_sas_internal(host->transportt); |
a923f756 CH |
196 | struct domain_device *dev = cmd_to_domain_dev(cmd); |
197 | struct sas_ha_struct *sas_ha = dev->port->ha; | |
198 | struct sas_task *task; | |
199 | int res = 0; | |
2908d778 | 200 | |
a923f756 | 201 | /* If the device fell off, no sense in issuing commands */ |
e139942d | 202 | if (test_bit(SAS_DEV_GONE, &dev->state)) { |
a923f756 CH |
203 | cmd->result = DID_BAD_TARGET << 16; |
204 | goto out_done; | |
205 | } | |
2908d778 | 206 | |
a923f756 | 207 | if (dev_is_sata(dev)) { |
312d3e56 | 208 | spin_lock_irq(dev->sata_dev.ap->lock); |
a923f756 | 209 | res = ata_sas_queuecmd(cmd, dev->sata_dev.ap); |
312d3e56 | 210 | spin_unlock_irq(dev->sata_dev.ap->lock); |
a923f756 CH |
211 | return res; |
212 | } | |
3eb7a51a | 213 | |
a923f756 CH |
214 | task = sas_create_task(cmd, dev, GFP_ATOMIC); |
215 | if (!task) | |
ac81c6a8 | 216 | return SCSI_MLQUEUE_HOST_BUSY; |
fa1c1e8f | 217 | |
a923f756 CH |
218 | /* Queue up, Direct Mode or Task Collector Mode. */ |
219 | if (sas_ha->lldd_max_execute_num < 2) | |
220 | res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); | |
221 | else | |
222 | res = sas_queue_up(task); | |
223 | ||
224 | if (res) | |
225 | goto out_free_task; | |
226 | return 0; | |
227 | ||
228 | out_free_task: | |
229 | SAS_DPRINTK("lldd_execute_task returned: %d\n", res); | |
230 | ASSIGN_SAS_TASK(cmd, NULL); | |
231 | sas_free_task(task); | |
ac81c6a8 CH |
232 | if (res == -SAS_QUEUE_FULL) |
233 | cmd->result = DID_SOFT_ERROR << 16; /* retry */ | |
234 | else | |
235 | cmd->result = DID_ERROR << 16; | |
a923f756 CH |
236 | out_done: |
237 | cmd->scsi_done(cmd); | |
238 | return 0; | |
2908d778 JB |
239 | } |
240 | ||
a8e14fec JB |
241 | static void sas_eh_finish_cmd(struct scsi_cmnd *cmd) |
242 | { | |
243 | struct sas_task *task = TO_SAS_TASK(cmd); | |
244 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(cmd->device->host); | |
245 | ||
a3a14252 DW |
246 | /* At this point, we only get called following an actual abort |
247 | * of the task, so we should be guaranteed not to be racing with | |
248 | * any completions from the LLD. Task is freed after this. | |
249 | */ | |
250 | sas_end_task(cmd, task); | |
251 | ||
a8e14fec JB |
252 | /* now finish the command and move it on to the error |
253 | * handler done list, this also takes it off the | |
a3a14252 DW |
254 | * error handler pending list. |
255 | */ | |
a8e14fec JB |
256 | scsi_eh_finish_cmd(cmd, &sas_ha->eh_done_q); |
257 | } | |
258 | ||
2908d778 JB |
259 | static void sas_scsi_clear_queue_lu(struct list_head *error_q, struct scsi_cmnd *my_cmd) |
260 | { | |
261 | struct scsi_cmnd *cmd, *n; | |
262 | ||
263 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
63e4563b JB |
264 | if (cmd->device->sdev_target == my_cmd->device->sdev_target && |
265 | cmd->device->lun == my_cmd->device->lun) | |
a8e14fec | 266 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
267 | } |
268 | } | |
269 | ||
270 | static void sas_scsi_clear_queue_I_T(struct list_head *error_q, | |
271 | struct domain_device *dev) | |
272 | { | |
273 | struct scsi_cmnd *cmd, *n; | |
274 | ||
275 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
276 | struct domain_device *x = cmd_to_domain_dev(cmd); | |
277 | ||
278 | if (x == dev) | |
a8e14fec | 279 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
280 | } |
281 | } | |
282 | ||
283 | static void sas_scsi_clear_queue_port(struct list_head *error_q, | |
284 | struct asd_sas_port *port) | |
285 | { | |
286 | struct scsi_cmnd *cmd, *n; | |
287 | ||
288 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
289 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
290 | struct asd_sas_port *x = dev->port; | |
291 | ||
292 | if (x == port) | |
a8e14fec | 293 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
294 | } |
295 | } | |
296 | ||
297 | enum task_disposition { | |
298 | TASK_IS_DONE, | |
299 | TASK_IS_ABORTED, | |
300 | TASK_IS_AT_LU, | |
301 | TASK_IS_NOT_AT_LU, | |
02cd743b | 302 | TASK_ABORT_FAILED, |
2908d778 JB |
303 | }; |
304 | ||
305 | static enum task_disposition sas_scsi_find_task(struct sas_task *task) | |
306 | { | |
307 | struct sas_ha_struct *ha = task->dev->port->ha; | |
308 | unsigned long flags; | |
309 | int i, res; | |
310 | struct sas_internal *si = | |
311 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
312 | ||
313 | if (ha->lldd_max_execute_num > 1) { | |
314 | struct scsi_core *core = &ha->core; | |
315 | struct sas_task *t, *n; | |
316 | ||
317 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
318 | list_for_each_entry_safe(t, n, &core->task_queue, list) { | |
319 | if (task == t) { | |
320 | list_del_init(&t->list); | |
321 | spin_unlock_irqrestore(&core->task_queue_lock, | |
322 | flags); | |
323 | SAS_DPRINTK("%s: task 0x%p aborted from " | |
324 | "task_queue\n", | |
cadbd4a5 | 325 | __func__, task); |
2908d778 JB |
326 | return TASK_IS_ABORTED; |
327 | } | |
328 | } | |
329 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
330 | } | |
331 | ||
332 | for (i = 0; i < 5; i++) { | |
cadbd4a5 | 333 | SAS_DPRINTK("%s: aborting task 0x%p\n", __func__, task); |
2908d778 JB |
334 | res = si->dft->lldd_abort_task(task); |
335 | ||
336 | spin_lock_irqsave(&task->task_state_lock, flags); | |
337 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { | |
338 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
cadbd4a5 | 339 | SAS_DPRINTK("%s: task 0x%p is done\n", __func__, |
2908d778 JB |
340 | task); |
341 | return TASK_IS_DONE; | |
342 | } | |
343 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
344 | ||
345 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
346 | SAS_DPRINTK("%s: task 0x%p is aborted\n", | |
cadbd4a5 | 347 | __func__, task); |
2908d778 JB |
348 | return TASK_IS_ABORTED; |
349 | } else if (si->dft->lldd_query_task) { | |
350 | SAS_DPRINTK("%s: querying task 0x%p\n", | |
cadbd4a5 | 351 | __func__, task); |
2908d778 | 352 | res = si->dft->lldd_query_task(task); |
02cd743b DW |
353 | switch (res) { |
354 | case TMF_RESP_FUNC_SUCC: | |
2908d778 | 355 | SAS_DPRINTK("%s: task 0x%p at LU\n", |
cadbd4a5 | 356 | __func__, task); |
2908d778 | 357 | return TASK_IS_AT_LU; |
02cd743b | 358 | case TMF_RESP_FUNC_COMPLETE: |
2908d778 | 359 | SAS_DPRINTK("%s: task 0x%p not at LU\n", |
cadbd4a5 | 360 | __func__, task); |
2908d778 | 361 | return TASK_IS_NOT_AT_LU; |
02cd743b DW |
362 | case TMF_RESP_FUNC_FAILED: |
363 | SAS_DPRINTK("%s: task 0x%p failed to abort\n", | |
cadbd4a5 | 364 | __func__, task); |
02cd743b DW |
365 | return TASK_ABORT_FAILED; |
366 | } | |
367 | ||
2908d778 JB |
368 | } |
369 | } | |
370 | return res; | |
371 | } | |
372 | ||
373 | static int sas_recover_lu(struct domain_device *dev, struct scsi_cmnd *cmd) | |
374 | { | |
375 | int res = TMF_RESP_FUNC_FAILED; | |
376 | struct scsi_lun lun; | |
377 | struct sas_internal *i = | |
378 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
379 | ||
380 | int_to_scsilun(cmd->device->lun, &lun); | |
381 | ||
382 | SAS_DPRINTK("eh: device %llx LUN %x has the task\n", | |
383 | SAS_ADDR(dev->sas_addr), | |
384 | cmd->device->lun); | |
385 | ||
386 | if (i->dft->lldd_abort_task_set) | |
387 | res = i->dft->lldd_abort_task_set(dev, lun.scsi_lun); | |
388 | ||
389 | if (res == TMF_RESP_FUNC_FAILED) { | |
390 | if (i->dft->lldd_clear_task_set) | |
391 | res = i->dft->lldd_clear_task_set(dev, lun.scsi_lun); | |
392 | } | |
393 | ||
394 | if (res == TMF_RESP_FUNC_FAILED) { | |
395 | if (i->dft->lldd_lu_reset) | |
396 | res = i->dft->lldd_lu_reset(dev, lun.scsi_lun); | |
397 | } | |
398 | ||
399 | return res; | |
400 | } | |
401 | ||
402 | static int sas_recover_I_T(struct domain_device *dev) | |
403 | { | |
404 | int res = TMF_RESP_FUNC_FAILED; | |
405 | struct sas_internal *i = | |
406 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
407 | ||
408 | SAS_DPRINTK("I_T nexus reset for dev %016llx\n", | |
409 | SAS_ADDR(dev->sas_addr)); | |
410 | ||
411 | if (i->dft->lldd_I_T_nexus_reset) | |
412 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
413 | ||
414 | return res; | |
415 | } | |
416 | ||
ad689233 | 417 | /* Find the sas_phy that's attached to this device */ |
5319578c | 418 | struct sas_phy *sas_find_local_phy(struct domain_device *dev) |
3ebf6922 | 419 | { |
ad689233 DW |
420 | struct domain_device *pdev = dev->parent; |
421 | struct ex_phy *exphy = NULL; | |
422 | int i; | |
423 | ||
424 | /* Directly attached device */ | |
425 | if (!pdev) | |
426 | return dev->port->phy; | |
3ebf6922 | 427 | |
ad689233 DW |
428 | /* Otherwise look in the expander */ |
429 | for (i = 0; i < pdev->ex_dev.num_phys; i++) | |
430 | if (!memcmp(dev->sas_addr, | |
431 | pdev->ex_dev.ex_phy[i].attached_sas_addr, | |
432 | SAS_ADDR_SIZE)) { | |
433 | exphy = &pdev->ex_dev.ex_phy[i]; | |
434 | break; | |
435 | } | |
3ebf6922 | 436 | |
ad689233 DW |
437 | BUG_ON(!exphy); |
438 | return exphy->phy; | |
3ebf6922 | 439 | } |
5319578c | 440 | EXPORT_SYMBOL_GPL(sas_find_local_phy); |
3ebf6922 | 441 | |
a9344e68 | 442 | /* Attempt to send a LUN reset message to a device */ |
ad689233 | 443 | int sas_eh_device_reset_handler(struct scsi_cmnd *cmd) |
a9344e68 DW |
444 | { |
445 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
446 | struct sas_internal *i = | |
447 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
448 | struct scsi_lun lun; | |
449 | int res; | |
450 | ||
451 | int_to_scsilun(cmd->device->lun, &lun); | |
452 | ||
453 | if (!i->dft->lldd_lu_reset) | |
454 | return FAILED; | |
455 | ||
456 | res = i->dft->lldd_lu_reset(dev, lun.scsi_lun); | |
457 | if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) | |
458 | return SUCCESS; | |
459 | ||
460 | return FAILED; | |
461 | } | |
462 | ||
463 | /* Attempt to send a phy (bus) reset */ | |
464 | int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd) | |
ad689233 DW |
465 | { |
466 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
5319578c | 467 | struct sas_phy *phy = sas_find_local_phy(dev); |
ad689233 DW |
468 | int res; |
469 | ||
470 | res = sas_phy_reset(phy, 1); | |
471 | if (res) | |
a9344e68 | 472 | SAS_DPRINTK("Bus reset of %s failed 0x%x\n", |
af5ca3f4 | 473 | kobject_name(&phy->dev.kobj), |
ad689233 DW |
474 | res); |
475 | if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) | |
476 | return SUCCESS; | |
477 | ||
478 | return FAILED; | |
479 | } | |
480 | ||
481 | /* Try to reset a device */ | |
8de3ef25 | 482 | static int try_to_reset_cmd_device(struct scsi_cmnd *cmd) |
ad689233 | 483 | { |
a9344e68 | 484 | int res; |
8de3ef25 | 485 | struct Scsi_Host *shost = cmd->device->host; |
a9344e68 | 486 | |
ad689233 | 487 | if (!shost->hostt->eh_device_reset_handler) |
a9344e68 DW |
488 | goto try_bus_reset; |
489 | ||
490 | res = shost->hostt->eh_device_reset_handler(cmd); | |
491 | if (res == SUCCESS) | |
492 | return res; | |
ad689233 | 493 | |
a9344e68 DW |
494 | try_bus_reset: |
495 | if (shost->hostt->eh_bus_reset_handler) | |
496 | return shost->hostt->eh_bus_reset_handler(cmd); | |
497 | ||
498 | return FAILED; | |
ad689233 DW |
499 | } |
500 | ||
501 | static int sas_eh_handle_sas_errors(struct Scsi_Host *shost, | |
502 | struct list_head *work_q, | |
503 | struct list_head *done_q) | |
2908d778 | 504 | { |
2908d778 JB |
505 | struct scsi_cmnd *cmd, *n; |
506 | enum task_disposition res = TASK_IS_DONE; | |
3ebf6922 | 507 | int tmf_resp, need_reset; |
2908d778 | 508 | struct sas_internal *i = to_sas_internal(shost->transportt); |
ad689233 DW |
509 | unsigned long flags; |
510 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
2908d778 | 511 | |
2908d778 | 512 | Again: |
ad689233 | 513 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
2908d778 JB |
514 | struct sas_task *task = TO_SAS_TASK(cmd); |
515 | ||
ad689233 | 516 | if (!task) |
f456393e | 517 | continue; |
ad689233 DW |
518 | |
519 | list_del_init(&cmd->eh_entry); | |
3ebf6922 DW |
520 | |
521 | spin_lock_irqsave(&task->task_state_lock, flags); | |
522 | need_reset = task->task_state_flags & SAS_TASK_NEED_DEV_RESET; | |
3ebf6922 DW |
523 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
524 | ||
8de3ef25 JB |
525 | if (need_reset) { |
526 | SAS_DPRINTK("%s: task 0x%p requests reset\n", | |
cadbd4a5 | 527 | __func__, task); |
8de3ef25 JB |
528 | goto reset; |
529 | } | |
530 | ||
2908d778 | 531 | SAS_DPRINTK("trying to find task 0x%p\n", task); |
2908d778 JB |
532 | res = sas_scsi_find_task(task); |
533 | ||
534 | cmd->eh_eflags = 0; | |
2908d778 JB |
535 | |
536 | switch (res) { | |
537 | case TASK_IS_DONE: | |
cadbd4a5 | 538 | SAS_DPRINTK("%s: task 0x%p is done\n", __func__, |
2908d778 | 539 | task); |
a8e14fec | 540 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
541 | continue; |
542 | case TASK_IS_ABORTED: | |
543 | SAS_DPRINTK("%s: task 0x%p is aborted\n", | |
cadbd4a5 | 544 | __func__, task); |
a8e14fec | 545 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
546 | continue; |
547 | case TASK_IS_AT_LU: | |
548 | SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task); | |
8de3ef25 | 549 | reset: |
2908d778 JB |
550 | tmf_resp = sas_recover_lu(task->dev, cmd); |
551 | if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { | |
552 | SAS_DPRINTK("dev %016llx LU %x is " | |
553 | "recovered\n", | |
554 | SAS_ADDR(task->dev), | |
555 | cmd->device->lun); | |
a8e14fec | 556 | sas_eh_finish_cmd(cmd); |
ad689233 | 557 | sas_scsi_clear_queue_lu(work_q, cmd); |
2908d778 JB |
558 | goto Again; |
559 | } | |
560 | /* fallthrough */ | |
561 | case TASK_IS_NOT_AT_LU: | |
02cd743b | 562 | case TASK_ABORT_FAILED: |
2908d778 JB |
563 | SAS_DPRINTK("task 0x%p is not at LU: I_T recover\n", |
564 | task); | |
565 | tmf_resp = sas_recover_I_T(task->dev); | |
566 | if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { | |
8de3ef25 | 567 | struct domain_device *dev = task->dev; |
2908d778 JB |
568 | SAS_DPRINTK("I_T %016llx recovered\n", |
569 | SAS_ADDR(task->dev->sas_addr)); | |
a8e14fec | 570 | sas_eh_finish_cmd(cmd); |
8de3ef25 | 571 | sas_scsi_clear_queue_I_T(work_q, dev); |
2908d778 JB |
572 | goto Again; |
573 | } | |
574 | /* Hammer time :-) */ | |
8de3ef25 | 575 | try_to_reset_cmd_device(cmd); |
2908d778 JB |
576 | if (i->dft->lldd_clear_nexus_port) { |
577 | struct asd_sas_port *port = task->dev->port; | |
578 | SAS_DPRINTK("clearing nexus for port:%d\n", | |
579 | port->id); | |
580 | res = i->dft->lldd_clear_nexus_port(port); | |
581 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
582 | SAS_DPRINTK("clear nexus port:%d " | |
583 | "succeeded\n", port->id); | |
a8e14fec | 584 | sas_eh_finish_cmd(cmd); |
ad689233 | 585 | sas_scsi_clear_queue_port(work_q, |
2908d778 JB |
586 | port); |
587 | goto Again; | |
588 | } | |
589 | } | |
590 | if (i->dft->lldd_clear_nexus_ha) { | |
591 | SAS_DPRINTK("clear nexus ha\n"); | |
592 | res = i->dft->lldd_clear_nexus_ha(ha); | |
593 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
594 | SAS_DPRINTK("clear nexus ha " | |
595 | "succeeded\n"); | |
a8e14fec | 596 | sas_eh_finish_cmd(cmd); |
a8e14fec | 597 | goto clear_q; |
2908d778 JB |
598 | } |
599 | } | |
600 | /* If we are here -- this means that no amount | |
601 | * of effort could recover from errors. Quite | |
602 | * possibly the HA just disappeared. | |
603 | */ | |
604 | SAS_DPRINTK("error from device %llx, LUN %x " | |
605 | "couldn't be recovered in any way\n", | |
606 | SAS_ADDR(task->dev->sas_addr), | |
607 | cmd->device->lun); | |
608 | ||
a8e14fec | 609 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
610 | goto clear_q; |
611 | } | |
612 | } | |
ad689233 | 613 | return list_empty(work_q); |
2908d778 | 614 | clear_q: |
cadbd4a5 | 615 | SAS_DPRINTK("--- Exit %s -- clear_q\n", __func__); |
a8e14fec JB |
616 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) |
617 | sas_eh_finish_cmd(cmd); | |
618 | ||
ad689233 DW |
619 | return list_empty(work_q); |
620 | } | |
621 | ||
622 | void sas_scsi_recover_host(struct Scsi_Host *shost) | |
623 | { | |
624 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
625 | unsigned long flags; | |
626 | LIST_HEAD(eh_work_q); | |
627 | ||
628 | spin_lock_irqsave(shost->host_lock, flags); | |
629 | list_splice_init(&shost->eh_cmd_q, &eh_work_q); | |
9ee91f7f | 630 | shost->host_eh_scheduled = 0; |
ad689233 DW |
631 | spin_unlock_irqrestore(shost->host_lock, flags); |
632 | ||
cadbd4a5 | 633 | SAS_DPRINTK("Enter %s\n", __func__); |
ad689233 DW |
634 | /* |
635 | * Deal with commands that still have SAS tasks (i.e. they didn't | |
636 | * complete via the normal sas_task completion mechanism) | |
637 | */ | |
638 | if (sas_eh_handle_sas_errors(shost, &eh_work_q, &ha->eh_done_q)) | |
639 | goto out; | |
640 | ||
641 | /* | |
642 | * Now deal with SCSI commands that completed ok but have a an error | |
643 | * code (and hopefully sense data) attached. This is roughly what | |
644 | * scsi_unjam_host does, but we skip scsi_eh_abort_cmds because any | |
645 | * command we see here has no sas_task and is thus unknown to the HA. | |
646 | */ | |
00dd4998 JB |
647 | if (!sas_ata_eh(shost, &eh_work_q, &ha->eh_done_q)) |
648 | if (!scsi_eh_get_sense(&eh_work_q, &ha->eh_done_q)) | |
649 | scsi_eh_ready_devs(shost, &eh_work_q, &ha->eh_done_q); | |
ad689233 DW |
650 | |
651 | out: | |
00dd4998 JB |
652 | /* now link into libata eh --- if we have any ata devices */ |
653 | sas_ata_strategy_handler(shost); | |
654 | ||
ad689233 | 655 | scsi_eh_flush_done_q(&ha->eh_done_q); |
00dd4998 | 656 | |
cadbd4a5 | 657 | SAS_DPRINTK("--- Exit %s\n", __func__); |
ad689233 | 658 | return; |
2908d778 JB |
659 | } |
660 | ||
242f9dcb | 661 | enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd) |
2908d778 JB |
662 | { |
663 | struct sas_task *task = TO_SAS_TASK(cmd); | |
664 | unsigned long flags; | |
c299190b | 665 | enum blk_eh_timer_return rtn; |
00dd4998 JB |
666 | |
667 | if (sas_ata_timed_out(cmd, task, &rtn)) | |
668 | return rtn; | |
2908d778 JB |
669 | |
670 | if (!task) { | |
242f9dcb | 671 | cmd->request->timeout /= 2; |
6d4dcd4d | 672 | SAS_DPRINTK("command 0x%p, task 0x%p, gone: %s\n", |
242f9dcb JA |
673 | cmd, task, (cmd->request->timeout ? |
674 | "BLK_EH_RESET_TIMER" : "BLK_EH_NOT_HANDLED")); | |
675 | if (!cmd->request->timeout) | |
676 | return BLK_EH_NOT_HANDLED; | |
677 | return BLK_EH_RESET_TIMER; | |
2908d778 JB |
678 | } |
679 | ||
680 | spin_lock_irqsave(&task->task_state_lock, flags); | |
396819fb | 681 | BUG_ON(task->task_state_flags & SAS_TASK_STATE_ABORTED); |
2908d778 JB |
682 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { |
683 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
242f9dcb JA |
684 | SAS_DPRINTK("command 0x%p, task 0x%p, timed out: " |
685 | "BLK_EH_HANDLED\n", cmd, task); | |
686 | return BLK_EH_HANDLED; | |
2908d778 | 687 | } |
b218a0d8 DW |
688 | if (!(task->task_state_flags & SAS_TASK_AT_INITIATOR)) { |
689 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
690 | SAS_DPRINTK("command 0x%p, task 0x%p, not at initiator: " | |
242f9dcb | 691 | "BLK_EH_RESET_TIMER\n", |
b218a0d8 | 692 | cmd, task); |
242f9dcb | 693 | return BLK_EH_RESET_TIMER; |
b218a0d8 | 694 | } |
2908d778 JB |
695 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
696 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
697 | ||
242f9dcb | 698 | SAS_DPRINTK("command 0x%p, task 0x%p, timed out: BLK_EH_NOT_HANDLED\n", |
2908d778 JB |
699 | cmd, task); |
700 | ||
242f9dcb | 701 | return BLK_EH_NOT_HANDLED; |
2908d778 JB |
702 | } |
703 | ||
fa1c1e8f DW |
704 | int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg) |
705 | { | |
706 | struct domain_device *dev = sdev_to_domain_dev(sdev); | |
707 | ||
708 | if (dev_is_sata(dev)) | |
94be9a58 | 709 | return ata_sas_scsi_ioctl(dev->sata_dev.ap, sdev, cmd, arg); |
fa1c1e8f DW |
710 | |
711 | return -EINVAL; | |
712 | } | |
713 | ||
2908d778 JB |
714 | struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy) |
715 | { | |
716 | struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent); | |
717 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
718 | struct domain_device *found_dev = NULL; | |
719 | int i; | |
980fa2f9 | 720 | unsigned long flags; |
2908d778 | 721 | |
980fa2f9 | 722 | spin_lock_irqsave(&ha->phy_port_lock, flags); |
2908d778 JB |
723 | for (i = 0; i < ha->num_phys; i++) { |
724 | struct asd_sas_port *port = ha->sas_port[i]; | |
725 | struct domain_device *dev; | |
726 | ||
727 | spin_lock(&port->dev_list_lock); | |
728 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
729 | if (rphy == dev->rphy) { | |
730 | found_dev = dev; | |
731 | spin_unlock(&port->dev_list_lock); | |
732 | goto found; | |
733 | } | |
734 | } | |
735 | spin_unlock(&port->dev_list_lock); | |
736 | } | |
737 | found: | |
980fa2f9 | 738 | spin_unlock_irqrestore(&ha->phy_port_lock, flags); |
2908d778 JB |
739 | |
740 | return found_dev; | |
741 | } | |
742 | ||
2908d778 JB |
743 | int sas_target_alloc(struct scsi_target *starget) |
744 | { | |
735f7d2f DW |
745 | struct sas_rphy *rphy = dev_to_rphy(starget->dev.parent); |
746 | struct domain_device *found_dev = sas_find_dev_by_rphy(rphy); | |
338ec570 | 747 | int res; |
2908d778 JB |
748 | |
749 | if (!found_dev) | |
750 | return -ENODEV; | |
751 | ||
fa1c1e8f | 752 | if (dev_is_sata(found_dev)) { |
338ec570 DW |
753 | res = sas_ata_init_host_and_port(found_dev, starget); |
754 | if (res) | |
755 | return res; | |
fa1c1e8f DW |
756 | } |
757 | ||
735f7d2f | 758 | kref_get(&found_dev->kref); |
2908d778 JB |
759 | starget->hostdata = found_dev; |
760 | return 0; | |
761 | } | |
762 | ||
97a1420d | 763 | #define SAS_DEF_QD 256 |
2908d778 JB |
764 | |
765 | int sas_slave_configure(struct scsi_device *scsi_dev) | |
766 | { | |
767 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); | |
768 | struct sas_ha_struct *sas_ha; | |
769 | ||
770 | BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE); | |
771 | ||
fa1c1e8f DW |
772 | if (dev_is_sata(dev)) { |
773 | ata_sas_slave_configure(scsi_dev, dev->sata_dev.ap); | |
774 | return 0; | |
775 | } | |
776 | ||
2908d778 JB |
777 | sas_ha = dev->port->ha; |
778 | ||
779 | sas_read_port_mode_page(scsi_dev); | |
780 | ||
781 | if (scsi_dev->tagged_supported) { | |
782 | scsi_set_tag_type(scsi_dev, MSG_SIMPLE_TAG); | |
783 | scsi_activate_tcq(scsi_dev, SAS_DEF_QD); | |
784 | } else { | |
785 | SAS_DPRINTK("device %llx, LUN %x doesn't support " | |
786 | "TCQ\n", SAS_ADDR(dev->sas_addr), | |
787 | scsi_dev->lun); | |
788 | scsi_dev->tagged_supported = 0; | |
789 | scsi_set_tag_type(scsi_dev, 0); | |
790 | scsi_deactivate_tcq(scsi_dev, 1); | |
791 | } | |
792 | ||
f27708fc DW |
793 | scsi_dev->allow_restart = 1; |
794 | ||
2908d778 JB |
795 | return 0; |
796 | } | |
797 | ||
97a1420d | 798 | int sas_change_queue_depth(struct scsi_device *sdev, int depth, int reason) |
2908d778 | 799 | { |
97a1420d | 800 | struct domain_device *dev = sdev_to_domain_dev(sdev); |
2908d778 | 801 | |
f6e67035 | 802 | if (dev_is_sata(dev)) |
97a1420d DW |
803 | return __ata_change_queue_depth(dev->sata_dev.ap, sdev, depth, |
804 | reason); | |
805 | ||
806 | switch (reason) { | |
807 | case SCSI_QDEPTH_DEFAULT: | |
808 | case SCSI_QDEPTH_RAMP_UP: | |
809 | if (!sdev->tagged_supported) | |
810 | depth = 1; | |
811 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
812 | break; | |
813 | case SCSI_QDEPTH_QFULL: | |
814 | scsi_track_queue_full(sdev, depth); | |
815 | break; | |
816 | default: | |
e881a172 | 817 | return -EOPNOTSUPP; |
2908d778 JB |
818 | } |
819 | ||
97a1420d | 820 | return depth; |
2908d778 JB |
821 | } |
822 | ||
823 | int sas_change_queue_type(struct scsi_device *scsi_dev, int qt) | |
824 | { | |
f6e67035 DW |
825 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); |
826 | ||
827 | if (dev_is_sata(dev)) | |
828 | return -EINVAL; | |
829 | ||
2908d778 JB |
830 | if (!scsi_dev->tagged_supported) |
831 | return 0; | |
832 | ||
833 | scsi_deactivate_tcq(scsi_dev, 1); | |
834 | ||
835 | scsi_set_tag_type(scsi_dev, qt); | |
836 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); | |
837 | ||
838 | return qt; | |
839 | } | |
840 | ||
841 | int sas_bios_param(struct scsi_device *scsi_dev, | |
842 | struct block_device *bdev, | |
843 | sector_t capacity, int *hsc) | |
844 | { | |
845 | hsc[0] = 255; | |
846 | hsc[1] = 63; | |
847 | sector_div(capacity, 255*63); | |
848 | hsc[2] = capacity; | |
849 | ||
850 | return 0; | |
851 | } | |
852 | ||
853 | /* ---------- Task Collector Thread implementation ---------- */ | |
854 | ||
855 | static void sas_queue(struct sas_ha_struct *sas_ha) | |
856 | { | |
857 | struct scsi_core *core = &sas_ha->core; | |
858 | unsigned long flags; | |
859 | LIST_HEAD(q); | |
860 | int can_queue; | |
861 | int res; | |
862 | struct sas_internal *i = to_sas_internal(core->shost->transportt); | |
863 | ||
864 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
d7a54e30 | 865 | while (!kthread_should_stop() && |
2908d778 JB |
866 | !list_empty(&core->task_queue)) { |
867 | ||
868 | can_queue = sas_ha->lldd_queue_size - core->task_queue_size; | |
869 | if (can_queue >= 0) { | |
870 | can_queue = core->task_queue_size; | |
871 | list_splice_init(&core->task_queue, &q); | |
872 | } else { | |
873 | struct list_head *a, *n; | |
874 | ||
875 | can_queue = sas_ha->lldd_queue_size; | |
876 | list_for_each_safe(a, n, &core->task_queue) { | |
877 | list_move_tail(a, &q); | |
878 | if (--can_queue == 0) | |
879 | break; | |
880 | } | |
881 | can_queue = sas_ha->lldd_queue_size; | |
882 | } | |
883 | core->task_queue_size -= can_queue; | |
884 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
885 | { | |
886 | struct sas_task *task = list_entry(q.next, | |
887 | struct sas_task, | |
888 | list); | |
889 | list_del_init(&q); | |
890 | res = i->dft->lldd_execute_task(task, can_queue, | |
891 | GFP_KERNEL); | |
892 | if (unlikely(res)) | |
893 | __list_add(&q, task->list.prev, &task->list); | |
894 | } | |
895 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
896 | if (res) { | |
897 | list_splice_init(&q, &core->task_queue); /*at head*/ | |
898 | core->task_queue_size += can_queue; | |
899 | } | |
900 | } | |
901 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
902 | } | |
903 | ||
2908d778 JB |
904 | /** |
905 | * sas_queue_thread -- The Task Collector thread | |
906 | * @_sas_ha: pointer to struct sas_ha | |
907 | */ | |
908 | static int sas_queue_thread(void *_sas_ha) | |
909 | { | |
910 | struct sas_ha_struct *sas_ha = _sas_ha; | |
2908d778 | 911 | |
2908d778 | 912 | while (1) { |
d7a54e30 CH |
913 | set_current_state(TASK_INTERRUPTIBLE); |
914 | schedule(); | |
2908d778 | 915 | sas_queue(sas_ha); |
d7a54e30 | 916 | if (kthread_should_stop()) |
2908d778 JB |
917 | break; |
918 | } | |
919 | ||
2908d778 JB |
920 | return 0; |
921 | } | |
922 | ||
923 | int sas_init_queue(struct sas_ha_struct *sas_ha) | |
924 | { | |
2908d778 JB |
925 | struct scsi_core *core = &sas_ha->core; |
926 | ||
927 | spin_lock_init(&core->task_queue_lock); | |
928 | core->task_queue_size = 0; | |
929 | INIT_LIST_HEAD(&core->task_queue); | |
2908d778 | 930 | |
d7a54e30 CH |
931 | core->queue_thread = kthread_run(sas_queue_thread, sas_ha, |
932 | "sas_queue_%d", core->shost->host_no); | |
933 | if (IS_ERR(core->queue_thread)) | |
934 | return PTR_ERR(core->queue_thread); | |
935 | return 0; | |
2908d778 JB |
936 | } |
937 | ||
938 | void sas_shutdown_queue(struct sas_ha_struct *sas_ha) | |
939 | { | |
940 | unsigned long flags; | |
941 | struct scsi_core *core = &sas_ha->core; | |
942 | struct sas_task *task, *n; | |
943 | ||
d7a54e30 | 944 | kthread_stop(core->queue_thread); |
2908d778 JB |
945 | |
946 | if (!list_empty(&core->task_queue)) | |
947 | SAS_DPRINTK("HA: %llx: scsi core task queue is NOT empty!?\n", | |
948 | SAS_ADDR(sas_ha->sas_addr)); | |
949 | ||
950 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
951 | list_for_each_entry_safe(task, n, &core->task_queue, list) { | |
952 | struct scsi_cmnd *cmd = task->uldd_task; | |
953 | ||
954 | list_del_init(&task->list); | |
955 | ||
956 | ASSIGN_SAS_TASK(cmd, NULL); | |
957 | sas_free_task(task); | |
958 | cmd->result = DID_ABORT << 16; | |
959 | cmd->scsi_done(cmd); | |
960 | } | |
961 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
962 | } | |
963 | ||
396819fb DW |
964 | /* |
965 | * Tell an upper layer that it needs to initiate an abort for a given task. | |
966 | * This should only ever be called by an LLDD. | |
967 | */ | |
968 | void sas_task_abort(struct sas_task *task) | |
79a5eb60 | 969 | { |
396819fb | 970 | struct scsi_cmnd *sc = task->uldd_task; |
79a5eb60 | 971 | |
396819fb DW |
972 | /* Escape for libsas internal commands */ |
973 | if (!sc) { | |
974 | if (!del_timer(&task->timer)) | |
79a5eb60 | 975 | return; |
396819fb DW |
976 | task->timer.function(task->timer.data); |
977 | return; | |
978 | } | |
79a5eb60 | 979 | |
3a2755af DW |
980 | if (dev_is_sata(task->dev)) { |
981 | sas_ata_task_abort(task); | |
1b4d0d8e JB |
982 | } else { |
983 | struct request_queue *q = sc->device->request_queue; | |
984 | unsigned long flags; | |
3a2755af | 985 | |
1b4d0d8e JB |
986 | spin_lock_irqsave(q->queue_lock, flags); |
987 | blk_abort_request(sc->request); | |
988 | spin_unlock_irqrestore(q->queue_lock, flags); | |
989 | scsi_schedule_eh(sc->device->host); | |
990 | } | |
79a5eb60 DW |
991 | } |
992 | ||
fa1c1e8f DW |
993 | int sas_slave_alloc(struct scsi_device *scsi_dev) |
994 | { | |
995 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); | |
996 | ||
997 | if (dev_is_sata(dev)) | |
998 | return ata_sas_port_init(dev->sata_dev.ap); | |
999 | ||
1000 | return 0; | |
1001 | } | |
1002 | ||
1003 | void sas_target_destroy(struct scsi_target *starget) | |
1004 | { | |
735f7d2f | 1005 | struct domain_device *found_dev = starget->hostdata; |
fa1c1e8f DW |
1006 | |
1007 | if (!found_dev) | |
1008 | return; | |
1009 | ||
1010 | if (dev_is_sata(found_dev)) | |
1011 | ata_sas_port_destroy(found_dev->sata_dev.ap); | |
1012 | ||
735f7d2f DW |
1013 | starget->hostdata = NULL; |
1014 | sas_put_device(found_dev); | |
fa1c1e8f DW |
1015 | } |
1016 | ||
45e6cdf4 DW |
1017 | static void sas_parse_addr(u8 *sas_addr, const char *p) |
1018 | { | |
1019 | int i; | |
1020 | for (i = 0; i < SAS_ADDR_SIZE; i++) { | |
1021 | u8 h, l; | |
1022 | if (!*p) | |
1023 | break; | |
1024 | h = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10; | |
1025 | p++; | |
1026 | l = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10; | |
1027 | p++; | |
1028 | sas_addr[i] = (h<<4) | l; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | #define SAS_STRING_ADDR_SIZE 16 | |
1033 | ||
1034 | int sas_request_addr(struct Scsi_Host *shost, u8 *addr) | |
1035 | { | |
1036 | int res; | |
1037 | const struct firmware *fw; | |
1038 | ||
1039 | res = request_firmware(&fw, "sas_addr", &shost->shost_gendev); | |
1040 | if (res) | |
1041 | return res; | |
1042 | ||
1043 | if (fw->size < SAS_STRING_ADDR_SIZE) { | |
1044 | res = -ENODEV; | |
1045 | goto out; | |
1046 | } | |
1047 | ||
1048 | sas_parse_addr(addr, fw->data); | |
1049 | ||
1050 | out: | |
1051 | release_firmware(fw); | |
1052 | return res; | |
1053 | } | |
1054 | EXPORT_SYMBOL_GPL(sas_request_addr); | |
1055 | ||
2908d778 JB |
1056 | EXPORT_SYMBOL_GPL(sas_queuecommand); |
1057 | EXPORT_SYMBOL_GPL(sas_target_alloc); | |
1058 | EXPORT_SYMBOL_GPL(sas_slave_configure); | |
2908d778 JB |
1059 | EXPORT_SYMBOL_GPL(sas_change_queue_depth); |
1060 | EXPORT_SYMBOL_GPL(sas_change_queue_type); | |
1061 | EXPORT_SYMBOL_GPL(sas_bios_param); | |
79a5eb60 | 1062 | EXPORT_SYMBOL_GPL(sas_task_abort); |
dea22214 | 1063 | EXPORT_SYMBOL_GPL(sas_phy_reset); |
acbf167d | 1064 | EXPORT_SYMBOL_GPL(sas_phy_enable); |
ad689233 | 1065 | EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler); |
a9344e68 | 1066 | EXPORT_SYMBOL_GPL(sas_eh_bus_reset_handler); |
fa1c1e8f DW |
1067 | EXPORT_SYMBOL_GPL(sas_slave_alloc); |
1068 | EXPORT_SYMBOL_GPL(sas_target_destroy); | |
1069 | EXPORT_SYMBOL_GPL(sas_ioctl); |