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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 JB |
51 | |
52 | /* ---------- SCSI Host glue ---------- */ | |
53 | ||
2908d778 JB |
54 | static void sas_scsi_task_done(struct sas_task *task) |
55 | { | |
56 | struct task_status_struct *ts = &task->task_status; | |
57 | struct scsi_cmnd *sc = task->uldd_task; | |
2908d778 JB |
58 | int hs = 0, stat = 0; |
59 | ||
a8e14fec JB |
60 | if (unlikely(task->task_state_flags & SAS_TASK_STATE_ABORTED)) { |
61 | /* Aborted tasks will be completed by the error handler */ | |
62 | SAS_DPRINTK("task done but aborted\n"); | |
63 | return; | |
64 | } | |
65 | ||
2908d778 JB |
66 | if (unlikely(!sc)) { |
67 | SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n"); | |
68 | list_del_init(&task->list); | |
69 | sas_free_task(task); | |
70 | return; | |
71 | } | |
72 | ||
73 | if (ts->resp == SAS_TASK_UNDELIVERED) { | |
74 | /* transport error */ | |
75 | hs = DID_NO_CONNECT; | |
76 | } else { /* ts->resp == SAS_TASK_COMPLETE */ | |
77 | /* task delivered, what happened afterwards? */ | |
78 | switch (ts->stat) { | |
79 | case SAS_DEV_NO_RESPONSE: | |
80 | case SAS_INTERRUPTED: | |
81 | case SAS_PHY_DOWN: | |
82 | case SAS_NAK_R_ERR: | |
83 | case SAS_OPEN_TO: | |
84 | hs = DID_NO_CONNECT; | |
85 | break; | |
86 | case SAS_DATA_UNDERRUN: | |
c13e5566 FT |
87 | scsi_set_resid(sc, ts->residual); |
88 | if (scsi_bufflen(sc) - scsi_get_resid(sc) < sc->underflow) | |
2908d778 JB |
89 | hs = DID_ERROR; |
90 | break; | |
91 | case SAS_DATA_OVERRUN: | |
92 | hs = DID_ERROR; | |
93 | break; | |
94 | case SAS_QUEUE_FULL: | |
95 | hs = DID_SOFT_ERROR; /* retry */ | |
96 | break; | |
97 | case SAS_DEVICE_UNKNOWN: | |
98 | hs = DID_BAD_TARGET; | |
99 | break; | |
100 | case SAS_SG_ERR: | |
101 | hs = DID_PARITY; | |
102 | break; | |
103 | case SAS_OPEN_REJECT: | |
104 | if (ts->open_rej_reason == SAS_OREJ_RSVD_RETRY) | |
105 | hs = DID_SOFT_ERROR; /* retry */ | |
106 | else | |
107 | hs = DID_ERROR; | |
108 | break; | |
109 | case SAS_PROTO_RESPONSE: | |
110 | SAS_DPRINTK("LLDD:%s sent SAS_PROTO_RESP for an SSP " | |
111 | "task; please report this\n", | |
112 | task->dev->port->ha->sas_ha_name); | |
113 | break; | |
114 | case SAS_ABORTED_TASK: | |
115 | hs = DID_ABORT; | |
116 | break; | |
df64d3ca | 117 | case SAM_STAT_CHECK_CONDITION: |
2908d778 | 118 | memcpy(sc->sense_buffer, ts->buf, |
cc75e8ab | 119 | min(SCSI_SENSE_BUFFERSIZE, ts->buf_valid_size)); |
df64d3ca | 120 | stat = SAM_STAT_CHECK_CONDITION; |
2908d778 JB |
121 | break; |
122 | default: | |
123 | stat = ts->stat; | |
124 | break; | |
125 | } | |
126 | } | |
127 | ASSIGN_SAS_TASK(sc, NULL); | |
128 | sc->result = (hs << 16) | stat; | |
129 | list_del_init(&task->list); | |
130 | sas_free_task(task); | |
a8e14fec | 131 | sc->scsi_done(sc); |
2908d778 JB |
132 | } |
133 | ||
2908d778 JB |
134 | static struct sas_task *sas_create_task(struct scsi_cmnd *cmd, |
135 | struct domain_device *dev, | |
3cc27547 | 136 | gfp_t gfp_flags) |
2908d778 JB |
137 | { |
138 | struct sas_task *task = sas_alloc_task(gfp_flags); | |
139 | struct scsi_lun lun; | |
140 | ||
141 | if (!task) | |
142 | return NULL; | |
143 | ||
2908d778 JB |
144 | task->uldd_task = cmd; |
145 | ASSIGN_SAS_TASK(cmd, task); | |
146 | ||
147 | task->dev = dev; | |
148 | task->task_proto = task->dev->tproto; /* BUG_ON(!SSP) */ | |
149 | ||
150 | task->ssp_task.retry_count = 1; | |
151 | int_to_scsilun(cmd->device->lun, &lun); | |
152 | memcpy(task->ssp_task.LUN, &lun.scsi_lun, 8); | |
9cbbdca4 | 153 | task->ssp_task.task_attr = TASK_ATTR_SIMPLE; |
2908d778 JB |
154 | memcpy(task->ssp_task.cdb, cmd->cmnd, 16); |
155 | ||
c13e5566 FT |
156 | task->scatter = scsi_sglist(cmd); |
157 | task->num_scatter = scsi_sg_count(cmd); | |
158 | task->total_xfer_len = scsi_bufflen(cmd); | |
2908d778 JB |
159 | task->data_dir = cmd->sc_data_direction; |
160 | ||
161 | task->task_done = sas_scsi_task_done; | |
162 | ||
163 | return task; | |
164 | } | |
165 | ||
338ec570 | 166 | int sas_queue_up(struct sas_task *task) |
2908d778 JB |
167 | { |
168 | struct sas_ha_struct *sas_ha = task->dev->port->ha; | |
169 | struct scsi_core *core = &sas_ha->core; | |
170 | unsigned long flags; | |
171 | LIST_HEAD(list); | |
172 | ||
173 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
174 | if (sas_ha->lldd_queue_size < core->task_queue_size + 1) { | |
175 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
176 | return -SAS_QUEUE_FULL; | |
177 | } | |
178 | list_add_tail(&task->list, &core->task_queue); | |
179 | core->task_queue_size += 1; | |
180 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
d7a54e30 | 181 | wake_up_process(core->queue_thread); |
2908d778 JB |
182 | |
183 | return 0; | |
184 | } | |
185 | ||
92bd401b | 186 | int sas_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) |
2908d778 | 187 | { |
2908d778 | 188 | struct sas_internal *i = to_sas_internal(host->transportt); |
a923f756 CH |
189 | struct domain_device *dev = cmd_to_domain_dev(cmd); |
190 | struct sas_ha_struct *sas_ha = dev->port->ha; | |
191 | struct sas_task *task; | |
192 | int res = 0; | |
2908d778 | 193 | |
a923f756 CH |
194 | /* If the device fell off, no sense in issuing commands */ |
195 | if (dev->gone) { | |
196 | cmd->result = DID_BAD_TARGET << 16; | |
197 | goto out_done; | |
198 | } | |
2908d778 | 199 | |
a923f756 CH |
200 | if (dev_is_sata(dev)) { |
201 | unsigned long flags; | |
3673f4bf | 202 | |
a923f756 CH |
203 | spin_lock_irqsave(dev->sata_dev.ap->lock, flags); |
204 | res = ata_sas_queuecmd(cmd, dev->sata_dev.ap); | |
205 | spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags); | |
206 | return res; | |
207 | } | |
3eb7a51a | 208 | |
a923f756 CH |
209 | task = sas_create_task(cmd, dev, GFP_ATOMIC); |
210 | if (!task) | |
ac81c6a8 | 211 | return SCSI_MLQUEUE_HOST_BUSY; |
fa1c1e8f | 212 | |
a923f756 CH |
213 | /* Queue up, Direct Mode or Task Collector Mode. */ |
214 | if (sas_ha->lldd_max_execute_num < 2) | |
215 | res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); | |
216 | else | |
217 | res = sas_queue_up(task); | |
218 | ||
219 | if (res) | |
220 | goto out_free_task; | |
221 | return 0; | |
222 | ||
223 | out_free_task: | |
224 | SAS_DPRINTK("lldd_execute_task returned: %d\n", res); | |
225 | ASSIGN_SAS_TASK(cmd, NULL); | |
226 | sas_free_task(task); | |
ac81c6a8 CH |
227 | if (res == -SAS_QUEUE_FULL) |
228 | cmd->result = DID_SOFT_ERROR << 16; /* retry */ | |
229 | else | |
230 | cmd->result = DID_ERROR << 16; | |
a923f756 CH |
231 | out_done: |
232 | cmd->scsi_done(cmd); | |
233 | return 0; | |
2908d778 JB |
234 | } |
235 | ||
a8e14fec JB |
236 | static void sas_eh_finish_cmd(struct scsi_cmnd *cmd) |
237 | { | |
238 | struct sas_task *task = TO_SAS_TASK(cmd); | |
239 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(cmd->device->host); | |
240 | ||
241 | /* remove the aborted task flag to allow the task to be | |
242 | * completed now. At this point, we only get called following | |
243 | * an actual abort of the task, so we should be guaranteed not | |
244 | * to be racing with any completions from the LLD (hence we | |
245 | * don't need the task state lock to clear the flag) */ | |
246 | task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; | |
247 | /* Now call task_done. However, task will be free'd after | |
248 | * this */ | |
249 | task->task_done(task); | |
250 | /* now finish the command and move it on to the error | |
251 | * handler done list, this also takes it off the | |
252 | * error handler pending list */ | |
253 | scsi_eh_finish_cmd(cmd, &sas_ha->eh_done_q); | |
254 | } | |
255 | ||
2908d778 JB |
256 | static void sas_scsi_clear_queue_lu(struct list_head *error_q, struct scsi_cmnd *my_cmd) |
257 | { | |
258 | struct scsi_cmnd *cmd, *n; | |
259 | ||
260 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
63e4563b JB |
261 | if (cmd->device->sdev_target == my_cmd->device->sdev_target && |
262 | cmd->device->lun == my_cmd->device->lun) | |
a8e14fec | 263 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
264 | } |
265 | } | |
266 | ||
267 | static void sas_scsi_clear_queue_I_T(struct list_head *error_q, | |
268 | struct domain_device *dev) | |
269 | { | |
270 | struct scsi_cmnd *cmd, *n; | |
271 | ||
272 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
273 | struct domain_device *x = cmd_to_domain_dev(cmd); | |
274 | ||
275 | if (x == dev) | |
a8e14fec | 276 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
277 | } |
278 | } | |
279 | ||
280 | static void sas_scsi_clear_queue_port(struct list_head *error_q, | |
281 | struct asd_sas_port *port) | |
282 | { | |
283 | struct scsi_cmnd *cmd, *n; | |
284 | ||
285 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { | |
286 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
287 | struct asd_sas_port *x = dev->port; | |
288 | ||
289 | if (x == port) | |
a8e14fec | 290 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
291 | } |
292 | } | |
293 | ||
294 | enum task_disposition { | |
295 | TASK_IS_DONE, | |
296 | TASK_IS_ABORTED, | |
297 | TASK_IS_AT_LU, | |
298 | TASK_IS_NOT_AT_LU, | |
02cd743b | 299 | TASK_ABORT_FAILED, |
2908d778 JB |
300 | }; |
301 | ||
302 | static enum task_disposition sas_scsi_find_task(struct sas_task *task) | |
303 | { | |
304 | struct sas_ha_struct *ha = task->dev->port->ha; | |
305 | unsigned long flags; | |
306 | int i, res; | |
307 | struct sas_internal *si = | |
308 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
309 | ||
310 | if (ha->lldd_max_execute_num > 1) { | |
311 | struct scsi_core *core = &ha->core; | |
312 | struct sas_task *t, *n; | |
313 | ||
314 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
315 | list_for_each_entry_safe(t, n, &core->task_queue, list) { | |
316 | if (task == t) { | |
317 | list_del_init(&t->list); | |
318 | spin_unlock_irqrestore(&core->task_queue_lock, | |
319 | flags); | |
320 | SAS_DPRINTK("%s: task 0x%p aborted from " | |
321 | "task_queue\n", | |
cadbd4a5 | 322 | __func__, task); |
2908d778 JB |
323 | return TASK_IS_ABORTED; |
324 | } | |
325 | } | |
326 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
327 | } | |
328 | ||
329 | for (i = 0; i < 5; i++) { | |
cadbd4a5 | 330 | SAS_DPRINTK("%s: aborting task 0x%p\n", __func__, task); |
2908d778 JB |
331 | res = si->dft->lldd_abort_task(task); |
332 | ||
333 | spin_lock_irqsave(&task->task_state_lock, flags); | |
334 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { | |
335 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
cadbd4a5 | 336 | SAS_DPRINTK("%s: task 0x%p is done\n", __func__, |
2908d778 JB |
337 | task); |
338 | return TASK_IS_DONE; | |
339 | } | |
340 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
341 | ||
342 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
343 | SAS_DPRINTK("%s: task 0x%p is aborted\n", | |
cadbd4a5 | 344 | __func__, task); |
2908d778 JB |
345 | return TASK_IS_ABORTED; |
346 | } else if (si->dft->lldd_query_task) { | |
347 | SAS_DPRINTK("%s: querying task 0x%p\n", | |
cadbd4a5 | 348 | __func__, task); |
2908d778 | 349 | res = si->dft->lldd_query_task(task); |
02cd743b DW |
350 | switch (res) { |
351 | case TMF_RESP_FUNC_SUCC: | |
2908d778 | 352 | SAS_DPRINTK("%s: task 0x%p at LU\n", |
cadbd4a5 | 353 | __func__, task); |
2908d778 | 354 | return TASK_IS_AT_LU; |
02cd743b | 355 | case TMF_RESP_FUNC_COMPLETE: |
2908d778 | 356 | SAS_DPRINTK("%s: task 0x%p not at LU\n", |
cadbd4a5 | 357 | __func__, task); |
2908d778 | 358 | return TASK_IS_NOT_AT_LU; |
02cd743b DW |
359 | case TMF_RESP_FUNC_FAILED: |
360 | SAS_DPRINTK("%s: task 0x%p failed to abort\n", | |
cadbd4a5 | 361 | __func__, task); |
02cd743b DW |
362 | return TASK_ABORT_FAILED; |
363 | } | |
364 | ||
2908d778 JB |
365 | } |
366 | } | |
367 | return res; | |
368 | } | |
369 | ||
370 | static int sas_recover_lu(struct domain_device *dev, struct scsi_cmnd *cmd) | |
371 | { | |
372 | int res = TMF_RESP_FUNC_FAILED; | |
373 | struct scsi_lun lun; | |
374 | struct sas_internal *i = | |
375 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
376 | ||
377 | int_to_scsilun(cmd->device->lun, &lun); | |
378 | ||
379 | SAS_DPRINTK("eh: device %llx LUN %x has the task\n", | |
380 | SAS_ADDR(dev->sas_addr), | |
381 | cmd->device->lun); | |
382 | ||
383 | if (i->dft->lldd_abort_task_set) | |
384 | res = i->dft->lldd_abort_task_set(dev, lun.scsi_lun); | |
385 | ||
386 | if (res == TMF_RESP_FUNC_FAILED) { | |
387 | if (i->dft->lldd_clear_task_set) | |
388 | res = i->dft->lldd_clear_task_set(dev, lun.scsi_lun); | |
389 | } | |
390 | ||
391 | if (res == TMF_RESP_FUNC_FAILED) { | |
392 | if (i->dft->lldd_lu_reset) | |
393 | res = i->dft->lldd_lu_reset(dev, lun.scsi_lun); | |
394 | } | |
395 | ||
396 | return res; | |
397 | } | |
398 | ||
399 | static int sas_recover_I_T(struct domain_device *dev) | |
400 | { | |
401 | int res = TMF_RESP_FUNC_FAILED; | |
402 | struct sas_internal *i = | |
403 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
404 | ||
405 | SAS_DPRINTK("I_T nexus reset for dev %016llx\n", | |
406 | SAS_ADDR(dev->sas_addr)); | |
407 | ||
408 | if (i->dft->lldd_I_T_nexus_reset) | |
409 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
410 | ||
411 | return res; | |
412 | } | |
413 | ||
ad689233 | 414 | /* Find the sas_phy that's attached to this device */ |
5319578c | 415 | struct sas_phy *sas_find_local_phy(struct domain_device *dev) |
3ebf6922 | 416 | { |
ad689233 DW |
417 | struct domain_device *pdev = dev->parent; |
418 | struct ex_phy *exphy = NULL; | |
419 | int i; | |
420 | ||
421 | /* Directly attached device */ | |
422 | if (!pdev) | |
423 | return dev->port->phy; | |
3ebf6922 | 424 | |
ad689233 DW |
425 | /* Otherwise look in the expander */ |
426 | for (i = 0; i < pdev->ex_dev.num_phys; i++) | |
427 | if (!memcmp(dev->sas_addr, | |
428 | pdev->ex_dev.ex_phy[i].attached_sas_addr, | |
429 | SAS_ADDR_SIZE)) { | |
430 | exphy = &pdev->ex_dev.ex_phy[i]; | |
431 | break; | |
432 | } | |
3ebf6922 | 433 | |
ad689233 DW |
434 | BUG_ON(!exphy); |
435 | return exphy->phy; | |
3ebf6922 | 436 | } |
5319578c | 437 | EXPORT_SYMBOL_GPL(sas_find_local_phy); |
3ebf6922 | 438 | |
a9344e68 | 439 | /* Attempt to send a LUN reset message to a device */ |
ad689233 | 440 | int sas_eh_device_reset_handler(struct scsi_cmnd *cmd) |
a9344e68 DW |
441 | { |
442 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
443 | struct sas_internal *i = | |
444 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
445 | struct scsi_lun lun; | |
446 | int res; | |
447 | ||
448 | int_to_scsilun(cmd->device->lun, &lun); | |
449 | ||
450 | if (!i->dft->lldd_lu_reset) | |
451 | return FAILED; | |
452 | ||
453 | res = i->dft->lldd_lu_reset(dev, lun.scsi_lun); | |
454 | if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) | |
455 | return SUCCESS; | |
456 | ||
457 | return FAILED; | |
458 | } | |
459 | ||
460 | /* Attempt to send a phy (bus) reset */ | |
461 | int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd) | |
ad689233 DW |
462 | { |
463 | struct domain_device *dev = cmd_to_domain_dev(cmd); | |
5319578c | 464 | struct sas_phy *phy = sas_find_local_phy(dev); |
ad689233 DW |
465 | int res; |
466 | ||
467 | res = sas_phy_reset(phy, 1); | |
468 | if (res) | |
a9344e68 | 469 | SAS_DPRINTK("Bus reset of %s failed 0x%x\n", |
af5ca3f4 | 470 | kobject_name(&phy->dev.kobj), |
ad689233 DW |
471 | res); |
472 | if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) | |
473 | return SUCCESS; | |
474 | ||
475 | return FAILED; | |
476 | } | |
477 | ||
478 | /* Try to reset a device */ | |
8de3ef25 | 479 | static int try_to_reset_cmd_device(struct scsi_cmnd *cmd) |
ad689233 | 480 | { |
a9344e68 | 481 | int res; |
8de3ef25 | 482 | struct Scsi_Host *shost = cmd->device->host; |
a9344e68 | 483 | |
ad689233 | 484 | if (!shost->hostt->eh_device_reset_handler) |
a9344e68 DW |
485 | goto try_bus_reset; |
486 | ||
487 | res = shost->hostt->eh_device_reset_handler(cmd); | |
488 | if (res == SUCCESS) | |
489 | return res; | |
ad689233 | 490 | |
a9344e68 DW |
491 | try_bus_reset: |
492 | if (shost->hostt->eh_bus_reset_handler) | |
493 | return shost->hostt->eh_bus_reset_handler(cmd); | |
494 | ||
495 | return FAILED; | |
ad689233 DW |
496 | } |
497 | ||
498 | static int sas_eh_handle_sas_errors(struct Scsi_Host *shost, | |
499 | struct list_head *work_q, | |
500 | struct list_head *done_q) | |
2908d778 | 501 | { |
2908d778 JB |
502 | struct scsi_cmnd *cmd, *n; |
503 | enum task_disposition res = TASK_IS_DONE; | |
3ebf6922 | 504 | int tmf_resp, need_reset; |
2908d778 | 505 | struct sas_internal *i = to_sas_internal(shost->transportt); |
ad689233 DW |
506 | unsigned long flags; |
507 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
2908d778 | 508 | |
2908d778 | 509 | Again: |
ad689233 | 510 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
2908d778 JB |
511 | struct sas_task *task = TO_SAS_TASK(cmd); |
512 | ||
ad689233 | 513 | if (!task) |
f456393e | 514 | continue; |
ad689233 DW |
515 | |
516 | list_del_init(&cmd->eh_entry); | |
3ebf6922 DW |
517 | |
518 | spin_lock_irqsave(&task->task_state_lock, flags); | |
519 | need_reset = task->task_state_flags & SAS_TASK_NEED_DEV_RESET; | |
3ebf6922 DW |
520 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
521 | ||
8de3ef25 JB |
522 | if (need_reset) { |
523 | SAS_DPRINTK("%s: task 0x%p requests reset\n", | |
cadbd4a5 | 524 | __func__, task); |
8de3ef25 JB |
525 | goto reset; |
526 | } | |
527 | ||
2908d778 | 528 | SAS_DPRINTK("trying to find task 0x%p\n", task); |
2908d778 JB |
529 | res = sas_scsi_find_task(task); |
530 | ||
531 | cmd->eh_eflags = 0; | |
2908d778 JB |
532 | |
533 | switch (res) { | |
534 | case TASK_IS_DONE: | |
cadbd4a5 | 535 | SAS_DPRINTK("%s: task 0x%p is done\n", __func__, |
2908d778 | 536 | task); |
a8e14fec | 537 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
538 | continue; |
539 | case TASK_IS_ABORTED: | |
540 | SAS_DPRINTK("%s: task 0x%p is aborted\n", | |
cadbd4a5 | 541 | __func__, task); |
a8e14fec | 542 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
543 | continue; |
544 | case TASK_IS_AT_LU: | |
545 | SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task); | |
8de3ef25 | 546 | reset: |
2908d778 JB |
547 | tmf_resp = sas_recover_lu(task->dev, cmd); |
548 | if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { | |
549 | SAS_DPRINTK("dev %016llx LU %x is " | |
550 | "recovered\n", | |
551 | SAS_ADDR(task->dev), | |
552 | cmd->device->lun); | |
a8e14fec | 553 | sas_eh_finish_cmd(cmd); |
ad689233 | 554 | sas_scsi_clear_queue_lu(work_q, cmd); |
2908d778 JB |
555 | goto Again; |
556 | } | |
557 | /* fallthrough */ | |
558 | case TASK_IS_NOT_AT_LU: | |
02cd743b | 559 | case TASK_ABORT_FAILED: |
2908d778 JB |
560 | SAS_DPRINTK("task 0x%p is not at LU: I_T recover\n", |
561 | task); | |
562 | tmf_resp = sas_recover_I_T(task->dev); | |
563 | if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { | |
8de3ef25 | 564 | struct domain_device *dev = task->dev; |
2908d778 JB |
565 | SAS_DPRINTK("I_T %016llx recovered\n", |
566 | SAS_ADDR(task->dev->sas_addr)); | |
a8e14fec | 567 | sas_eh_finish_cmd(cmd); |
8de3ef25 | 568 | sas_scsi_clear_queue_I_T(work_q, dev); |
2908d778 JB |
569 | goto Again; |
570 | } | |
571 | /* Hammer time :-) */ | |
8de3ef25 | 572 | try_to_reset_cmd_device(cmd); |
2908d778 JB |
573 | if (i->dft->lldd_clear_nexus_port) { |
574 | struct asd_sas_port *port = task->dev->port; | |
575 | SAS_DPRINTK("clearing nexus for port:%d\n", | |
576 | port->id); | |
577 | res = i->dft->lldd_clear_nexus_port(port); | |
578 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
579 | SAS_DPRINTK("clear nexus port:%d " | |
580 | "succeeded\n", port->id); | |
a8e14fec | 581 | sas_eh_finish_cmd(cmd); |
ad689233 | 582 | sas_scsi_clear_queue_port(work_q, |
2908d778 JB |
583 | port); |
584 | goto Again; | |
585 | } | |
586 | } | |
587 | if (i->dft->lldd_clear_nexus_ha) { | |
588 | SAS_DPRINTK("clear nexus ha\n"); | |
589 | res = i->dft->lldd_clear_nexus_ha(ha); | |
590 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
591 | SAS_DPRINTK("clear nexus ha " | |
592 | "succeeded\n"); | |
a8e14fec | 593 | sas_eh_finish_cmd(cmd); |
a8e14fec | 594 | goto clear_q; |
2908d778 JB |
595 | } |
596 | } | |
597 | /* If we are here -- this means that no amount | |
598 | * of effort could recover from errors. Quite | |
599 | * possibly the HA just disappeared. | |
600 | */ | |
601 | SAS_DPRINTK("error from device %llx, LUN %x " | |
602 | "couldn't be recovered in any way\n", | |
603 | SAS_ADDR(task->dev->sas_addr), | |
604 | cmd->device->lun); | |
605 | ||
a8e14fec | 606 | sas_eh_finish_cmd(cmd); |
2908d778 JB |
607 | goto clear_q; |
608 | } | |
609 | } | |
ad689233 | 610 | return list_empty(work_q); |
2908d778 | 611 | clear_q: |
cadbd4a5 | 612 | SAS_DPRINTK("--- Exit %s -- clear_q\n", __func__); |
a8e14fec JB |
613 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) |
614 | sas_eh_finish_cmd(cmd); | |
615 | ||
ad689233 DW |
616 | return list_empty(work_q); |
617 | } | |
618 | ||
619 | void sas_scsi_recover_host(struct Scsi_Host *shost) | |
620 | { | |
621 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
622 | unsigned long flags; | |
623 | LIST_HEAD(eh_work_q); | |
624 | ||
625 | spin_lock_irqsave(shost->host_lock, flags); | |
626 | list_splice_init(&shost->eh_cmd_q, &eh_work_q); | |
9ee91f7f | 627 | shost->host_eh_scheduled = 0; |
ad689233 DW |
628 | spin_unlock_irqrestore(shost->host_lock, flags); |
629 | ||
cadbd4a5 | 630 | SAS_DPRINTK("Enter %s\n", __func__); |
ad689233 DW |
631 | /* |
632 | * Deal with commands that still have SAS tasks (i.e. they didn't | |
633 | * complete via the normal sas_task completion mechanism) | |
634 | */ | |
635 | if (sas_eh_handle_sas_errors(shost, &eh_work_q, &ha->eh_done_q)) | |
636 | goto out; | |
637 | ||
638 | /* | |
639 | * Now deal with SCSI commands that completed ok but have a an error | |
640 | * code (and hopefully sense data) attached. This is roughly what | |
641 | * scsi_unjam_host does, but we skip scsi_eh_abort_cmds because any | |
642 | * command we see here has no sas_task and is thus unknown to the HA. | |
643 | */ | |
00dd4998 JB |
644 | if (!sas_ata_eh(shost, &eh_work_q, &ha->eh_done_q)) |
645 | if (!scsi_eh_get_sense(&eh_work_q, &ha->eh_done_q)) | |
646 | scsi_eh_ready_devs(shost, &eh_work_q, &ha->eh_done_q); | |
ad689233 DW |
647 | |
648 | out: | |
00dd4998 JB |
649 | /* now link into libata eh --- if we have any ata devices */ |
650 | sas_ata_strategy_handler(shost); | |
651 | ||
ad689233 | 652 | scsi_eh_flush_done_q(&ha->eh_done_q); |
00dd4998 | 653 | |
cadbd4a5 | 654 | SAS_DPRINTK("--- Exit %s\n", __func__); |
ad689233 | 655 | return; |
2908d778 JB |
656 | } |
657 | ||
242f9dcb | 658 | enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd) |
2908d778 JB |
659 | { |
660 | struct sas_task *task = TO_SAS_TASK(cmd); | |
661 | unsigned long flags; | |
c299190b | 662 | enum blk_eh_timer_return rtn; |
00dd4998 JB |
663 | |
664 | if (sas_ata_timed_out(cmd, task, &rtn)) | |
665 | return rtn; | |
2908d778 JB |
666 | |
667 | if (!task) { | |
242f9dcb | 668 | cmd->request->timeout /= 2; |
6d4dcd4d | 669 | SAS_DPRINTK("command 0x%p, task 0x%p, gone: %s\n", |
242f9dcb JA |
670 | cmd, task, (cmd->request->timeout ? |
671 | "BLK_EH_RESET_TIMER" : "BLK_EH_NOT_HANDLED")); | |
672 | if (!cmd->request->timeout) | |
673 | return BLK_EH_NOT_HANDLED; | |
674 | return BLK_EH_RESET_TIMER; | |
2908d778 JB |
675 | } |
676 | ||
677 | spin_lock_irqsave(&task->task_state_lock, flags); | |
396819fb | 678 | BUG_ON(task->task_state_flags & SAS_TASK_STATE_ABORTED); |
2908d778 JB |
679 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { |
680 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
242f9dcb JA |
681 | SAS_DPRINTK("command 0x%p, task 0x%p, timed out: " |
682 | "BLK_EH_HANDLED\n", cmd, task); | |
683 | return BLK_EH_HANDLED; | |
2908d778 | 684 | } |
b218a0d8 DW |
685 | if (!(task->task_state_flags & SAS_TASK_AT_INITIATOR)) { |
686 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
687 | SAS_DPRINTK("command 0x%p, task 0x%p, not at initiator: " | |
242f9dcb | 688 | "BLK_EH_RESET_TIMER\n", |
b218a0d8 | 689 | cmd, task); |
242f9dcb | 690 | return BLK_EH_RESET_TIMER; |
b218a0d8 | 691 | } |
2908d778 JB |
692 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
693 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
694 | ||
242f9dcb | 695 | SAS_DPRINTK("command 0x%p, task 0x%p, timed out: BLK_EH_NOT_HANDLED\n", |
2908d778 JB |
696 | cmd, task); |
697 | ||
242f9dcb | 698 | return BLK_EH_NOT_HANDLED; |
2908d778 JB |
699 | } |
700 | ||
fa1c1e8f DW |
701 | int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg) |
702 | { | |
703 | struct domain_device *dev = sdev_to_domain_dev(sdev); | |
704 | ||
705 | if (dev_is_sata(dev)) | |
94be9a58 | 706 | return ata_sas_scsi_ioctl(dev->sata_dev.ap, sdev, cmd, arg); |
fa1c1e8f DW |
707 | |
708 | return -EINVAL; | |
709 | } | |
710 | ||
2908d778 JB |
711 | struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy) |
712 | { | |
713 | struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent); | |
714 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
715 | struct domain_device *found_dev = NULL; | |
716 | int i; | |
980fa2f9 | 717 | unsigned long flags; |
2908d778 | 718 | |
980fa2f9 | 719 | spin_lock_irqsave(&ha->phy_port_lock, flags); |
2908d778 JB |
720 | for (i = 0; i < ha->num_phys; i++) { |
721 | struct asd_sas_port *port = ha->sas_port[i]; | |
722 | struct domain_device *dev; | |
723 | ||
724 | spin_lock(&port->dev_list_lock); | |
725 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
726 | if (rphy == dev->rphy) { | |
727 | found_dev = dev; | |
728 | spin_unlock(&port->dev_list_lock); | |
729 | goto found; | |
730 | } | |
731 | } | |
732 | spin_unlock(&port->dev_list_lock); | |
733 | } | |
734 | found: | |
980fa2f9 | 735 | spin_unlock_irqrestore(&ha->phy_port_lock, flags); |
2908d778 JB |
736 | |
737 | return found_dev; | |
738 | } | |
739 | ||
740 | static inline struct domain_device *sas_find_target(struct scsi_target *starget) | |
741 | { | |
742 | struct sas_rphy *rphy = dev_to_rphy(starget->dev.parent); | |
743 | ||
744 | return sas_find_dev_by_rphy(rphy); | |
745 | } | |
746 | ||
747 | int sas_target_alloc(struct scsi_target *starget) | |
748 | { | |
749 | struct domain_device *found_dev = sas_find_target(starget); | |
338ec570 | 750 | int res; |
2908d778 JB |
751 | |
752 | if (!found_dev) | |
753 | return -ENODEV; | |
754 | ||
fa1c1e8f | 755 | if (dev_is_sata(found_dev)) { |
338ec570 DW |
756 | res = sas_ata_init_host_and_port(found_dev, starget); |
757 | if (res) | |
758 | return res; | |
fa1c1e8f DW |
759 | } |
760 | ||
2908d778 JB |
761 | starget->hostdata = found_dev; |
762 | return 0; | |
763 | } | |
764 | ||
97a1420d | 765 | #define SAS_DEF_QD 256 |
2908d778 JB |
766 | |
767 | int sas_slave_configure(struct scsi_device *scsi_dev) | |
768 | { | |
769 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); | |
770 | struct sas_ha_struct *sas_ha; | |
771 | ||
772 | BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE); | |
773 | ||
fa1c1e8f DW |
774 | if (dev_is_sata(dev)) { |
775 | ata_sas_slave_configure(scsi_dev, dev->sata_dev.ap); | |
776 | return 0; | |
777 | } | |
778 | ||
2908d778 JB |
779 | sas_ha = dev->port->ha; |
780 | ||
781 | sas_read_port_mode_page(scsi_dev); | |
782 | ||
783 | if (scsi_dev->tagged_supported) { | |
784 | scsi_set_tag_type(scsi_dev, MSG_SIMPLE_TAG); | |
785 | scsi_activate_tcq(scsi_dev, SAS_DEF_QD); | |
786 | } else { | |
787 | SAS_DPRINTK("device %llx, LUN %x doesn't support " | |
788 | "TCQ\n", SAS_ADDR(dev->sas_addr), | |
789 | scsi_dev->lun); | |
790 | scsi_dev->tagged_supported = 0; | |
791 | scsi_set_tag_type(scsi_dev, 0); | |
792 | scsi_deactivate_tcq(scsi_dev, 1); | |
793 | } | |
794 | ||
f27708fc DW |
795 | scsi_dev->allow_restart = 1; |
796 | ||
2908d778 JB |
797 | return 0; |
798 | } | |
799 | ||
800 | void sas_slave_destroy(struct scsi_device *scsi_dev) | |
801 | { | |
fa1c1e8f DW |
802 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); |
803 | ||
804 | if (dev_is_sata(dev)) | |
b50102d3 | 805 | sas_to_ata_dev(dev)->class = ATA_DEV_NONE; |
2908d778 JB |
806 | } |
807 | ||
97a1420d | 808 | int sas_change_queue_depth(struct scsi_device *sdev, int depth, int reason) |
2908d778 | 809 | { |
97a1420d | 810 | struct domain_device *dev = sdev_to_domain_dev(sdev); |
2908d778 | 811 | |
f6e67035 | 812 | if (dev_is_sata(dev)) |
97a1420d DW |
813 | return __ata_change_queue_depth(dev->sata_dev.ap, sdev, depth, |
814 | reason); | |
815 | ||
816 | switch (reason) { | |
817 | case SCSI_QDEPTH_DEFAULT: | |
818 | case SCSI_QDEPTH_RAMP_UP: | |
819 | if (!sdev->tagged_supported) | |
820 | depth = 1; | |
821 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
822 | break; | |
823 | case SCSI_QDEPTH_QFULL: | |
824 | scsi_track_queue_full(sdev, depth); | |
825 | break; | |
826 | default: | |
e881a172 | 827 | return -EOPNOTSUPP; |
2908d778 JB |
828 | } |
829 | ||
97a1420d | 830 | return depth; |
2908d778 JB |
831 | } |
832 | ||
833 | int sas_change_queue_type(struct scsi_device *scsi_dev, int qt) | |
834 | { | |
f6e67035 DW |
835 | struct domain_device *dev = sdev_to_domain_dev(scsi_dev); |
836 | ||
837 | if (dev_is_sata(dev)) | |
838 | return -EINVAL; | |
839 | ||
2908d778 JB |
840 | if (!scsi_dev->tagged_supported) |
841 | return 0; | |
842 | ||
843 | scsi_deactivate_tcq(scsi_dev, 1); | |
844 | ||
845 | scsi_set_tag_type(scsi_dev, qt); | |
846 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); | |
847 | ||
848 | return qt; | |
849 | } | |
850 | ||
851 | int sas_bios_param(struct scsi_device *scsi_dev, | |
852 | struct block_device *bdev, | |
853 | sector_t capacity, int *hsc) | |
854 | { | |
855 | hsc[0] = 255; | |
856 | hsc[1] = 63; | |
857 | sector_div(capacity, 255*63); | |
858 | hsc[2] = capacity; | |
859 | ||
860 | return 0; | |
861 | } | |
862 | ||
863 | /* ---------- Task Collector Thread implementation ---------- */ | |
864 | ||
865 | static void sas_queue(struct sas_ha_struct *sas_ha) | |
866 | { | |
867 | struct scsi_core *core = &sas_ha->core; | |
868 | unsigned long flags; | |
869 | LIST_HEAD(q); | |
870 | int can_queue; | |
871 | int res; | |
872 | struct sas_internal *i = to_sas_internal(core->shost->transportt); | |
873 | ||
874 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
d7a54e30 | 875 | while (!kthread_should_stop() && |
2908d778 JB |
876 | !list_empty(&core->task_queue)) { |
877 | ||
878 | can_queue = sas_ha->lldd_queue_size - core->task_queue_size; | |
879 | if (can_queue >= 0) { | |
880 | can_queue = core->task_queue_size; | |
881 | list_splice_init(&core->task_queue, &q); | |
882 | } else { | |
883 | struct list_head *a, *n; | |
884 | ||
885 | can_queue = sas_ha->lldd_queue_size; | |
886 | list_for_each_safe(a, n, &core->task_queue) { | |
887 | list_move_tail(a, &q); | |
888 | if (--can_queue == 0) | |
889 | break; | |
890 | } | |
891 | can_queue = sas_ha->lldd_queue_size; | |
892 | } | |
893 | core->task_queue_size -= can_queue; | |
894 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
895 | { | |
896 | struct sas_task *task = list_entry(q.next, | |
897 | struct sas_task, | |
898 | list); | |
899 | list_del_init(&q); | |
900 | res = i->dft->lldd_execute_task(task, can_queue, | |
901 | GFP_KERNEL); | |
902 | if (unlikely(res)) | |
903 | __list_add(&q, task->list.prev, &task->list); | |
904 | } | |
905 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
906 | if (res) { | |
907 | list_splice_init(&q, &core->task_queue); /*at head*/ | |
908 | core->task_queue_size += can_queue; | |
909 | } | |
910 | } | |
911 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
912 | } | |
913 | ||
2908d778 JB |
914 | /** |
915 | * sas_queue_thread -- The Task Collector thread | |
916 | * @_sas_ha: pointer to struct sas_ha | |
917 | */ | |
918 | static int sas_queue_thread(void *_sas_ha) | |
919 | { | |
920 | struct sas_ha_struct *sas_ha = _sas_ha; | |
2908d778 | 921 | |
2908d778 | 922 | while (1) { |
d7a54e30 CH |
923 | set_current_state(TASK_INTERRUPTIBLE); |
924 | schedule(); | |
2908d778 | 925 | sas_queue(sas_ha); |
d7a54e30 | 926 | if (kthread_should_stop()) |
2908d778 JB |
927 | break; |
928 | } | |
929 | ||
2908d778 JB |
930 | return 0; |
931 | } | |
932 | ||
933 | int sas_init_queue(struct sas_ha_struct *sas_ha) | |
934 | { | |
2908d778 JB |
935 | struct scsi_core *core = &sas_ha->core; |
936 | ||
937 | spin_lock_init(&core->task_queue_lock); | |
938 | core->task_queue_size = 0; | |
939 | INIT_LIST_HEAD(&core->task_queue); | |
2908d778 | 940 | |
d7a54e30 CH |
941 | core->queue_thread = kthread_run(sas_queue_thread, sas_ha, |
942 | "sas_queue_%d", core->shost->host_no); | |
943 | if (IS_ERR(core->queue_thread)) | |
944 | return PTR_ERR(core->queue_thread); | |
945 | return 0; | |
2908d778 JB |
946 | } |
947 | ||
948 | void sas_shutdown_queue(struct sas_ha_struct *sas_ha) | |
949 | { | |
950 | unsigned long flags; | |
951 | struct scsi_core *core = &sas_ha->core; | |
952 | struct sas_task *task, *n; | |
953 | ||
d7a54e30 | 954 | kthread_stop(core->queue_thread); |
2908d778 JB |
955 | |
956 | if (!list_empty(&core->task_queue)) | |
957 | SAS_DPRINTK("HA: %llx: scsi core task queue is NOT empty!?\n", | |
958 | SAS_ADDR(sas_ha->sas_addr)); | |
959 | ||
960 | spin_lock_irqsave(&core->task_queue_lock, flags); | |
961 | list_for_each_entry_safe(task, n, &core->task_queue, list) { | |
962 | struct scsi_cmnd *cmd = task->uldd_task; | |
963 | ||
964 | list_del_init(&task->list); | |
965 | ||
966 | ASSIGN_SAS_TASK(cmd, NULL); | |
967 | sas_free_task(task); | |
968 | cmd->result = DID_ABORT << 16; | |
969 | cmd->scsi_done(cmd); | |
970 | } | |
971 | spin_unlock_irqrestore(&core->task_queue_lock, flags); | |
972 | } | |
973 | ||
396819fb DW |
974 | /* |
975 | * Call the LLDD task abort routine directly. This function is intended for | |
976 | * use by upper layers that need to tell the LLDD to abort a task. | |
977 | */ | |
978 | int __sas_task_abort(struct sas_task *task) | |
79a5eb60 | 979 | { |
79a5eb60 DW |
980 | struct sas_internal *si = |
981 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
982 | unsigned long flags; | |
983 | int res; | |
984 | ||
985 | spin_lock_irqsave(&task->task_state_lock, flags); | |
396819fb DW |
986 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED || |
987 | task->task_state_flags & SAS_TASK_STATE_DONE) { | |
79a5eb60 | 988 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
cadbd4a5 | 989 | SAS_DPRINTK("%s: Task %p already finished.\n", __func__, |
79a5eb60 DW |
990 | task); |
991 | return 0; | |
992 | } | |
396819fb | 993 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
79a5eb60 DW |
994 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
995 | ||
996 | if (!si->dft->lldd_abort_task) | |
997 | return -ENODEV; | |
998 | ||
999 | res = si->dft->lldd_abort_task(task); | |
396819fb DW |
1000 | |
1001 | spin_lock_irqsave(&task->task_state_lock, flags); | |
79a5eb60 DW |
1002 | if ((task->task_state_flags & SAS_TASK_STATE_DONE) || |
1003 | (res == TMF_RESP_FUNC_COMPLETE)) | |
1004 | { | |
396819fb DW |
1005 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
1006 | task->task_done(task); | |
79a5eb60 DW |
1007 | return 0; |
1008 | } | |
1009 | ||
79a5eb60 DW |
1010 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) |
1011 | task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; | |
1012 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
1013 | ||
1014 | return -EAGAIN; | |
1015 | } | |
1016 | ||
396819fb DW |
1017 | /* |
1018 | * Tell an upper layer that it needs to initiate an abort for a given task. | |
1019 | * This should only ever be called by an LLDD. | |
1020 | */ | |
1021 | void sas_task_abort(struct sas_task *task) | |
79a5eb60 | 1022 | { |
396819fb | 1023 | struct scsi_cmnd *sc = task->uldd_task; |
79a5eb60 | 1024 | |
396819fb DW |
1025 | /* Escape for libsas internal commands */ |
1026 | if (!sc) { | |
1027 | if (!del_timer(&task->timer)) | |
79a5eb60 | 1028 | return; |
396819fb DW |
1029 | task->timer.function(task->timer.data); |
1030 | return; | |
1031 | } | |
79a5eb60 | 1032 | |
3a2755af DW |
1033 | if (dev_is_sata(task->dev)) { |
1034 | sas_ata_task_abort(task); | |
1b4d0d8e JB |
1035 | } else { |
1036 | struct request_queue *q = sc->device->request_queue; | |
1037 | unsigned long flags; | |
3a2755af | 1038 | |
1b4d0d8e JB |
1039 | spin_lock_irqsave(q->queue_lock, flags); |
1040 | blk_abort_request(sc->request); | |
1041 | spin_unlock_irqrestore(q->queue_lock, flags); | |
1042 | scsi_schedule_eh(sc->device->host); | |
1043 | } | |
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); |