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2908d778 JB |
1 | /* |
2 | * Serial Attached SCSI (SAS) Transport Layer initialization | |
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 | ||
26 | #include <linux/module.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
2908d778 JB |
28 | #include <linux/init.h> |
29 | #include <linux/device.h> | |
30 | #include <linux/spinlock.h> | |
81c757bc | 31 | #include <scsi/sas_ata.h> |
2908d778 JB |
32 | #include <scsi/scsi_host.h> |
33 | #include <scsi/scsi_device.h> | |
34 | #include <scsi/scsi_transport.h> | |
35 | #include <scsi/scsi_transport_sas.h> | |
36 | ||
37 | #include "sas_internal.h" | |
38 | ||
39 | #include "../scsi_sas_internal.h" | |
40 | ||
4fcf812c DW |
41 | static struct kmem_cache *sas_task_cache; |
42 | ||
43 | struct sas_task *sas_alloc_task(gfp_t flags) | |
44 | { | |
45 | struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags); | |
46 | ||
47 | if (task) { | |
48 | INIT_LIST_HEAD(&task->list); | |
49 | spin_lock_init(&task->task_state_lock); | |
50 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
4fcf812c DW |
51 | } |
52 | ||
53 | return task; | |
54 | } | |
55 | EXPORT_SYMBOL_GPL(sas_alloc_task); | |
56 | ||
f0bf750c DW |
57 | struct sas_task *sas_alloc_slow_task(gfp_t flags) |
58 | { | |
59 | struct sas_task *task = sas_alloc_task(flags); | |
60 | struct sas_task_slow *slow = kmalloc(sizeof(*slow), flags); | |
61 | ||
62 | if (!task || !slow) { | |
63 | if (task) | |
64 | kmem_cache_free(sas_task_cache, task); | |
65 | kfree(slow); | |
66 | return NULL; | |
67 | } | |
68 | ||
69 | task->slow_task = slow; | |
70 | init_timer(&slow->timer); | |
71 | init_completion(&slow->completion); | |
72 | ||
73 | return task; | |
74 | } | |
75 | EXPORT_SYMBOL_GPL(sas_alloc_slow_task); | |
76 | ||
4fcf812c DW |
77 | void sas_free_task(struct sas_task *task) |
78 | { | |
79 | if (task) { | |
80 | BUG_ON(!list_empty(&task->list)); | |
f0bf750c | 81 | kfree(task->slow_task); |
4fcf812c DW |
82 | kmem_cache_free(sas_task_cache, task); |
83 | } | |
84 | } | |
85 | EXPORT_SYMBOL_GPL(sas_free_task); | |
2908d778 JB |
86 | |
87 | /*------------ SAS addr hash -----------*/ | |
88 | void sas_hash_addr(u8 *hashed, const u8 *sas_addr) | |
89 | { | |
90 | const u32 poly = 0x00DB2777; | |
91 | u32 r = 0; | |
92 | int i; | |
93 | ||
94 | for (i = 0; i < 8; i++) { | |
95 | int b; | |
96 | for (b = 7; b >= 0; b--) { | |
97 | r <<= 1; | |
98 | if ((1 << b) & sas_addr[i]) { | |
99 | if (!(r & 0x01000000)) | |
100 | r ^= poly; | |
101 | } else if (r & 0x01000000) | |
102 | r ^= poly; | |
103 | } | |
104 | } | |
105 | ||
106 | hashed[0] = (r >> 16) & 0xFF; | |
107 | hashed[1] = (r >> 8) & 0xFF ; | |
108 | hashed[2] = r & 0xFF; | |
109 | } | |
110 | ||
111 | ||
112 | /* ---------- HA events ---------- */ | |
113 | ||
c4028958 | 114 | void sas_hae_reset(struct work_struct *work) |
2908d778 | 115 | { |
22b9153f | 116 | struct sas_ha_event *ev = to_sas_ha_event(work); |
c4028958 | 117 | struct sas_ha_struct *ha = ev->ha; |
2908d778 | 118 | |
b15ebe0b | 119 | clear_bit(HAE_RESET, &ha->pending); |
2908d778 JB |
120 | } |
121 | ||
122 | int sas_register_ha(struct sas_ha_struct *sas_ha) | |
123 | { | |
124 | int error = 0; | |
125 | ||
87c8331f | 126 | mutex_init(&sas_ha->disco_mutex); |
2908d778 JB |
127 | spin_lock_init(&sas_ha->phy_port_lock); |
128 | sas_hash_addr(sas_ha->hashed_sas_addr, sas_ha->sas_addr); | |
129 | ||
130 | if (sas_ha->lldd_queue_size == 0) | |
131 | sas_ha->lldd_queue_size = 1; | |
132 | else if (sas_ha->lldd_queue_size == -1) | |
133 | sas_ha->lldd_queue_size = 128; /* Sanity */ | |
134 | ||
f8daa6e6 | 135 | set_bit(SAS_HA_REGISTERED, &sas_ha->state); |
e4a9c373 | 136 | spin_lock_init(&sas_ha->lock); |
b1124cd3 | 137 | mutex_init(&sas_ha->drain_mutex); |
5db45bdc | 138 | init_waitqueue_head(&sas_ha->eh_wait_q); |
b1124cd3 | 139 | INIT_LIST_HEAD(&sas_ha->defer_q); |
5db45bdc | 140 | INIT_LIST_HEAD(&sas_ha->eh_dev_q); |
6b0efb85 | 141 | |
2908d778 JB |
142 | error = sas_register_phys(sas_ha); |
143 | if (error) { | |
144 | printk(KERN_NOTICE "couldn't register sas phys:%d\n", error); | |
145 | return error; | |
146 | } | |
147 | ||
148 | error = sas_register_ports(sas_ha); | |
149 | if (error) { | |
150 | printk(KERN_NOTICE "couldn't register sas ports:%d\n", error); | |
151 | goto Undo_phys; | |
152 | } | |
153 | ||
154 | error = sas_init_events(sas_ha); | |
155 | if (error) { | |
156 | printk(KERN_NOTICE "couldn't start event thread:%d\n", error); | |
157 | goto Undo_ports; | |
158 | } | |
159 | ||
160 | if (sas_ha->lldd_max_execute_num > 1) { | |
161 | error = sas_init_queue(sas_ha); | |
162 | if (error) { | |
163 | printk(KERN_NOTICE "couldn't start queue thread:%d, " | |
164 | "running in direct mode\n", error); | |
165 | sas_ha->lldd_max_execute_num = 1; | |
166 | } | |
167 | } | |
168 | ||
f456393e | 169 | INIT_LIST_HEAD(&sas_ha->eh_done_q); |
3944f509 | 170 | INIT_LIST_HEAD(&sas_ha->eh_ata_q); |
f456393e | 171 | |
2908d778 JB |
172 | return 0; |
173 | ||
174 | Undo_ports: | |
175 | sas_unregister_ports(sas_ha); | |
176 | Undo_phys: | |
177 | ||
178 | return error; | |
179 | } | |
180 | ||
303694ee | 181 | static void sas_disable_events(struct sas_ha_struct *sas_ha) |
2908d778 | 182 | { |
b1124cd3 | 183 | /* Set the state to unregistered to avoid further unchained |
5d7f6d10 | 184 | * events to be queued, and flush any in-progress drainers |
b1124cd3 | 185 | */ |
5d7f6d10 | 186 | mutex_lock(&sas_ha->drain_mutex); |
e4a9c373 | 187 | spin_lock_irq(&sas_ha->lock); |
f8daa6e6 | 188 | clear_bit(SAS_HA_REGISTERED, &sas_ha->state); |
e4a9c373 | 189 | spin_unlock_irq(&sas_ha->lock); |
5d7f6d10 DW |
190 | __sas_drain_work(sas_ha); |
191 | mutex_unlock(&sas_ha->drain_mutex); | |
303694ee | 192 | } |
6b0efb85 | 193 | |
303694ee DW |
194 | int sas_unregister_ha(struct sas_ha_struct *sas_ha) |
195 | { | |
196 | sas_disable_events(sas_ha); | |
cde3f74b | 197 | sas_unregister_ports(sas_ha); |
5d7f6d10 DW |
198 | |
199 | /* flush unregistration work */ | |
200 | mutex_lock(&sas_ha->drain_mutex); | |
201 | __sas_drain_work(sas_ha); | |
202 | mutex_unlock(&sas_ha->drain_mutex); | |
cde3f74b | 203 | |
2908d778 JB |
204 | if (sas_ha->lldd_max_execute_num > 1) { |
205 | sas_shutdown_queue(sas_ha); | |
cde3f74b | 206 | sas_ha->lldd_max_execute_num = 1; |
2908d778 JB |
207 | } |
208 | ||
2908d778 JB |
209 | return 0; |
210 | } | |
211 | ||
212 | static int sas_get_linkerrors(struct sas_phy *phy) | |
213 | { | |
ac013ed1 DW |
214 | if (scsi_is_sas_phy_local(phy)) { |
215 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
216 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); | |
217 | struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number]; | |
218 | struct sas_internal *i = | |
219 | to_sas_internal(sas_ha->core.shost->transportt); | |
220 | ||
221 | return i->dft->lldd_control_phy(asd_phy, PHY_FUNC_GET_EVENTS, NULL); | |
222 | } | |
2908d778 JB |
223 | |
224 | return sas_smp_get_phy_events(phy); | |
225 | } | |
226 | ||
ab526633 DW |
227 | int sas_try_ata_reset(struct asd_sas_phy *asd_phy) |
228 | { | |
229 | struct domain_device *dev = NULL; | |
230 | ||
231 | /* try to route user requested link resets through libata */ | |
232 | if (asd_phy->port) | |
233 | dev = asd_phy->port->port_dev; | |
234 | ||
235 | /* validate that dev has been probed */ | |
236 | if (dev) | |
237 | dev = sas_find_dev_by_rphy(dev->rphy); | |
238 | ||
239 | if (dev && dev_is_sata(dev)) { | |
240 | sas_ata_schedule_reset(dev); | |
241 | sas_ata_wait_eh(dev); | |
242 | return 0; | |
243 | } | |
244 | ||
245 | return -ENODEV; | |
246 | } | |
247 | ||
81c757bc DW |
248 | /** |
249 | * transport_sas_phy_reset - reset a phy and permit libata to manage the link | |
250 | * | |
251 | * phy reset request via sysfs in host workqueue context so we know we | |
252 | * can block on eh and safely traverse the domain_device topology | |
253 | */ | |
254 | static int transport_sas_phy_reset(struct sas_phy *phy, int hard_reset) | |
255 | { | |
81c757bc DW |
256 | enum phy_func reset_type; |
257 | ||
258 | if (hard_reset) | |
259 | reset_type = PHY_FUNC_HARD_RESET; | |
260 | else | |
261 | reset_type = PHY_FUNC_LINK_RESET; | |
262 | ||
263 | if (scsi_is_sas_phy_local(phy)) { | |
264 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
265 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); | |
266 | struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number]; | |
267 | struct sas_internal *i = | |
268 | to_sas_internal(sas_ha->core.shost->transportt); | |
81c757bc | 269 | |
ab526633 DW |
270 | if (!hard_reset && sas_try_ata_reset(asd_phy) == 0) |
271 | return 0; | |
272 | return i->dft->lldd_control_phy(asd_phy, reset_type, NULL); | |
81c757bc DW |
273 | } else { |
274 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); | |
275 | struct domain_device *ddev = sas_find_dev_by_rphy(rphy); | |
276 | struct domain_device *ata_dev = sas_ex_to_ata(ddev, phy->number); | |
277 | ||
278 | if (ata_dev && !hard_reset) { | |
279 | sas_ata_schedule_reset(ata_dev); | |
280 | sas_ata_wait_eh(ata_dev); | |
ab526633 | 281 | return 0; |
81c757bc | 282 | } else |
ab526633 | 283 | return sas_smp_phy_control(ddev, phy->number, reset_type, NULL); |
81c757bc | 284 | } |
81c757bc DW |
285 | } |
286 | ||
2a559f4b | 287 | static int sas_phy_enable(struct sas_phy *phy, int enable) |
acbf167d DW |
288 | { |
289 | int ret; | |
2a559f4b | 290 | enum phy_func cmd; |
acbf167d DW |
291 | |
292 | if (enable) | |
2a559f4b | 293 | cmd = PHY_FUNC_LINK_RESET; |
acbf167d | 294 | else |
2a559f4b | 295 | cmd = PHY_FUNC_DISABLE; |
acbf167d DW |
296 | |
297 | if (scsi_is_sas_phy_local(phy)) { | |
298 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
299 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); | |
300 | struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number]; | |
301 | struct sas_internal *i = | |
302 | to_sas_internal(sas_ha->core.shost->transportt); | |
303 | ||
2a559f4b DW |
304 | if (enable) |
305 | ret = transport_sas_phy_reset(phy, 0); | |
1f4fe89c | 306 | else |
2a559f4b | 307 | ret = i->dft->lldd_control_phy(asd_phy, cmd, NULL); |
acbf167d DW |
308 | } else { |
309 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); | |
310 | struct domain_device *ddev = sas_find_dev_by_rphy(rphy); | |
2a559f4b DW |
311 | |
312 | if (enable) | |
313 | ret = transport_sas_phy_reset(phy, 0); | |
314 | else | |
315 | ret = sas_smp_phy_control(ddev, phy->number, cmd, NULL); | |
acbf167d DW |
316 | } |
317 | return ret; | |
318 | } | |
319 | ||
dea22214 | 320 | int sas_phy_reset(struct sas_phy *phy, int hard_reset) |
2908d778 JB |
321 | { |
322 | int ret; | |
323 | enum phy_func reset_type; | |
324 | ||
26a2e68f DW |
325 | if (!phy->enabled) |
326 | return -ENODEV; | |
327 | ||
2908d778 JB |
328 | if (hard_reset) |
329 | reset_type = PHY_FUNC_HARD_RESET; | |
330 | else | |
331 | reset_type = PHY_FUNC_LINK_RESET; | |
332 | ||
333 | if (scsi_is_sas_phy_local(phy)) { | |
334 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
335 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); | |
336 | struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number]; | |
337 | struct sas_internal *i = | |
338 | to_sas_internal(sas_ha->core.shost->transportt); | |
339 | ||
a01e70e5 | 340 | ret = i->dft->lldd_control_phy(asd_phy, reset_type, NULL); |
2908d778 JB |
341 | } else { |
342 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); | |
343 | struct domain_device *ddev = sas_find_dev_by_rphy(rphy); | |
a01e70e5 | 344 | ret = sas_smp_phy_control(ddev, phy->number, reset_type, NULL); |
2908d778 JB |
345 | } |
346 | return ret; | |
347 | } | |
348 | ||
acbf167d DW |
349 | int sas_set_phy_speed(struct sas_phy *phy, |
350 | struct sas_phy_linkrates *rates) | |
a01e70e5 JB |
351 | { |
352 | int ret; | |
353 | ||
354 | if ((rates->minimum_linkrate && | |
355 | rates->minimum_linkrate > phy->maximum_linkrate) || | |
356 | (rates->maximum_linkrate && | |
357 | rates->maximum_linkrate < phy->minimum_linkrate)) | |
358 | return -EINVAL; | |
359 | ||
360 | if (rates->minimum_linkrate && | |
361 | rates->minimum_linkrate < phy->minimum_linkrate_hw) | |
362 | rates->minimum_linkrate = phy->minimum_linkrate_hw; | |
363 | ||
364 | if (rates->maximum_linkrate && | |
365 | rates->maximum_linkrate > phy->maximum_linkrate_hw) | |
366 | rates->maximum_linkrate = phy->maximum_linkrate_hw; | |
367 | ||
368 | if (scsi_is_sas_phy_local(phy)) { | |
369 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
370 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); | |
371 | struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number]; | |
372 | struct sas_internal *i = | |
373 | to_sas_internal(sas_ha->core.shost->transportt); | |
374 | ||
375 | ret = i->dft->lldd_control_phy(asd_phy, PHY_FUNC_SET_LINK_RATE, | |
376 | rates); | |
377 | } else { | |
378 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); | |
379 | struct domain_device *ddev = sas_find_dev_by_rphy(rphy); | |
380 | ret = sas_smp_phy_control(ddev, phy->number, | |
381 | PHY_FUNC_LINK_RESET, rates); | |
382 | ||
383 | } | |
384 | ||
385 | return ret; | |
386 | } | |
387 | ||
303694ee DW |
388 | void sas_prep_resume_ha(struct sas_ha_struct *ha) |
389 | { | |
390 | int i; | |
391 | ||
392 | set_bit(SAS_HA_REGISTERED, &ha->state); | |
393 | ||
394 | /* clear out any stale link events/data from the suspension path */ | |
395 | for (i = 0; i < ha->num_phys; i++) { | |
396 | struct asd_sas_phy *phy = ha->sas_phy[i]; | |
397 | ||
398 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); | |
399 | phy->port_events_pending = 0; | |
400 | phy->phy_events_pending = 0; | |
401 | phy->frame_rcvd_size = 0; | |
402 | } | |
403 | } | |
404 | EXPORT_SYMBOL(sas_prep_resume_ha); | |
405 | ||
406 | static int phys_suspended(struct sas_ha_struct *ha) | |
407 | { | |
408 | int i, rc = 0; | |
409 | ||
410 | for (i = 0; i < ha->num_phys; i++) { | |
411 | struct asd_sas_phy *phy = ha->sas_phy[i]; | |
412 | ||
413 | if (phy->suspended) | |
414 | rc++; | |
415 | } | |
416 | ||
417 | return rc; | |
418 | } | |
419 | ||
420 | void sas_resume_ha(struct sas_ha_struct *ha) | |
421 | { | |
422 | const unsigned long tmo = msecs_to_jiffies(25000); | |
423 | int i; | |
424 | ||
425 | /* deform ports on phys that did not resume | |
426 | * at this point we may be racing the phy coming back (as posted | |
427 | * by the lldd). So we post the event and once we are in the | |
428 | * libsas context check that the phy remains suspended before | |
429 | * tearing it down. | |
430 | */ | |
431 | i = phys_suspended(ha); | |
432 | if (i) | |
433 | dev_info(ha->dev, "waiting up to 25 seconds for %d phy%s to resume\n", | |
434 | i, i > 1 ? "s" : ""); | |
435 | wait_event_timeout(ha->eh_wait_q, phys_suspended(ha) == 0, tmo); | |
436 | for (i = 0; i < ha->num_phys; i++) { | |
437 | struct asd_sas_phy *phy = ha->sas_phy[i]; | |
438 | ||
439 | if (phy->suspended) { | |
440 | dev_warn(&phy->phy->dev, "resume timeout\n"); | |
441 | sas_notify_phy_event(phy, PHYE_RESUME_TIMEOUT); | |
442 | } | |
443 | } | |
444 | ||
445 | /* all phys are back up or timed out, turn on i/o so we can | |
446 | * flush out disks that did not return | |
447 | */ | |
448 | scsi_unblock_requests(ha->core.shost); | |
449 | sas_drain_work(ha); | |
450 | } | |
451 | EXPORT_SYMBOL(sas_resume_ha); | |
452 | ||
453 | void sas_suspend_ha(struct sas_ha_struct *ha) | |
454 | { | |
455 | int i; | |
456 | ||
457 | sas_disable_events(ha); | |
458 | scsi_block_requests(ha->core.shost); | |
459 | for (i = 0; i < ha->num_phys; i++) { | |
460 | struct asd_sas_port *port = ha->sas_port[i]; | |
461 | ||
462 | sas_discover_event(port, DISCE_SUSPEND); | |
463 | } | |
464 | ||
465 | /* flush suspend events while unregistered */ | |
466 | mutex_lock(&ha->drain_mutex); | |
467 | __sas_drain_work(ha); | |
468 | mutex_unlock(&ha->drain_mutex); | |
469 | } | |
470 | EXPORT_SYMBOL(sas_suspend_ha); | |
471 | ||
0b3e09da DW |
472 | static void sas_phy_release(struct sas_phy *phy) |
473 | { | |
474 | kfree(phy->hostdata); | |
475 | phy->hostdata = NULL; | |
476 | } | |
477 | ||
478 | static void phy_reset_work(struct work_struct *work) | |
479 | { | |
22b9153f | 480 | struct sas_phy_data *d = container_of(work, typeof(*d), reset_work.work); |
0b3e09da | 481 | |
81c757bc | 482 | d->reset_result = transport_sas_phy_reset(d->phy, d->hard_reset); |
0b3e09da DW |
483 | } |
484 | ||
2a559f4b DW |
485 | static void phy_enable_work(struct work_struct *work) |
486 | { | |
22b9153f | 487 | struct sas_phy_data *d = container_of(work, typeof(*d), enable_work.work); |
2a559f4b DW |
488 | |
489 | d->enable_result = sas_phy_enable(d->phy, d->enable); | |
490 | } | |
491 | ||
0b3e09da DW |
492 | static int sas_phy_setup(struct sas_phy *phy) |
493 | { | |
494 | struct sas_phy_data *d = kzalloc(sizeof(*d), GFP_KERNEL); | |
495 | ||
496 | if (!d) | |
497 | return -ENOMEM; | |
498 | ||
499 | mutex_init(&d->event_lock); | |
22b9153f DW |
500 | INIT_SAS_WORK(&d->reset_work, phy_reset_work); |
501 | INIT_SAS_WORK(&d->enable_work, phy_enable_work); | |
0b3e09da DW |
502 | d->phy = phy; |
503 | phy->hostdata = d; | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static int queue_phy_reset(struct sas_phy *phy, int hard_reset) | |
509 | { | |
510 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
511 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
512 | struct sas_phy_data *d = phy->hostdata; | |
513 | int rc; | |
514 | ||
515 | if (!d) | |
516 | return -ENOMEM; | |
517 | ||
518 | /* libsas workqueue coordinates ata-eh reset with discovery */ | |
519 | mutex_lock(&d->event_lock); | |
520 | d->reset_result = 0; | |
521 | d->hard_reset = hard_reset; | |
522 | ||
e4a9c373 | 523 | spin_lock_irq(&ha->lock); |
0b3e09da | 524 | sas_queue_work(ha, &d->reset_work); |
e4a9c373 | 525 | spin_unlock_irq(&ha->lock); |
0b3e09da DW |
526 | |
527 | rc = sas_drain_work(ha); | |
528 | if (rc == 0) | |
529 | rc = d->reset_result; | |
530 | mutex_unlock(&d->event_lock); | |
531 | ||
532 | return rc; | |
533 | } | |
534 | ||
2a559f4b DW |
535 | static int queue_phy_enable(struct sas_phy *phy, int enable) |
536 | { | |
537 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
538 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
539 | struct sas_phy_data *d = phy->hostdata; | |
540 | int rc; | |
541 | ||
542 | if (!d) | |
543 | return -ENOMEM; | |
544 | ||
545 | /* libsas workqueue coordinates ata-eh reset with discovery */ | |
546 | mutex_lock(&d->event_lock); | |
547 | d->enable_result = 0; | |
548 | d->enable = enable; | |
549 | ||
e4a9c373 | 550 | spin_lock_irq(&ha->lock); |
2a559f4b | 551 | sas_queue_work(ha, &d->enable_work); |
e4a9c373 | 552 | spin_unlock_irq(&ha->lock); |
2a559f4b DW |
553 | |
554 | rc = sas_drain_work(ha); | |
555 | if (rc == 0) | |
556 | rc = d->enable_result; | |
557 | mutex_unlock(&d->event_lock); | |
558 | ||
559 | return rc; | |
560 | } | |
561 | ||
2908d778 | 562 | static struct sas_function_template sft = { |
2a559f4b | 563 | .phy_enable = queue_phy_enable, |
0b3e09da DW |
564 | .phy_reset = queue_phy_reset, |
565 | .phy_setup = sas_phy_setup, | |
566 | .phy_release = sas_phy_release, | |
a01e70e5 | 567 | .set_phy_speed = sas_set_phy_speed, |
2908d778 | 568 | .get_linkerrors = sas_get_linkerrors, |
ba1fc175 | 569 | .smp_handler = sas_smp_handler, |
2908d778 JB |
570 | }; |
571 | ||
572 | struct scsi_transport_template * | |
573 | sas_domain_attach_transport(struct sas_domain_function_template *dft) | |
574 | { | |
575 | struct scsi_transport_template *stt = sas_attach_transport(&sft); | |
576 | struct sas_internal *i; | |
577 | ||
578 | if (!stt) | |
579 | return stt; | |
580 | ||
581 | i = to_sas_internal(stt); | |
582 | i->dft = dft; | |
583 | stt->create_work_queue = 1; | |
584 | stt->eh_timed_out = sas_scsi_timed_out; | |
585 | stt->eh_strategy_handler = sas_scsi_recover_host; | |
586 | ||
587 | return stt; | |
588 | } | |
589 | EXPORT_SYMBOL_GPL(sas_domain_attach_transport); | |
590 | ||
591 | ||
592 | void sas_domain_release_transport(struct scsi_transport_template *stt) | |
593 | { | |
594 | sas_release_transport(stt); | |
595 | } | |
596 | EXPORT_SYMBOL_GPL(sas_domain_release_transport); | |
597 | ||
598 | /* ---------- SAS Class register/unregister ---------- */ | |
599 | ||
600 | static int __init sas_class_init(void) | |
601 | { | |
4fcf812c | 602 | sas_task_cache = KMEM_CACHE(sas_task, SLAB_HWCACHE_ALIGN); |
2908d778 JB |
603 | if (!sas_task_cache) |
604 | return -ENOMEM; | |
605 | ||
606 | return 0; | |
607 | } | |
608 | ||
609 | static void __exit sas_class_exit(void) | |
610 | { | |
611 | kmem_cache_destroy(sas_task_cache); | |
612 | } | |
613 | ||
614 | MODULE_AUTHOR("Luben Tuikov <luben_tuikov@adaptec.com>"); | |
615 | MODULE_DESCRIPTION("SAS Transport Layer"); | |
616 | MODULE_LICENSE("GPL v2"); | |
617 | ||
618 | module_init(sas_class_init); | |
619 | module_exit(sas_class_exit); | |
620 | ||
621 | EXPORT_SYMBOL_GPL(sas_register_ha); | |
622 | EXPORT_SYMBOL_GPL(sas_unregister_ha); |