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