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[SCSI] aic94xx: new driver
[thirdparty/linux.git] / drivers / scsi / libsas / sas_discover.c
CommitLineData
2908d778
JB		 1/*
2 * Serial Attached SCSI (SAS) Discover process
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 *
23 */
24
25#include <linux/pci.h>
26#include <linux/scatterlist.h>
27#include <scsi/scsi_host.h>
28#include <scsi/scsi_eh.h>
29#include "sas_internal.h"
30
31#include <scsi/scsi_transport.h>
32#include <scsi/scsi_transport_sas.h>
33#include "../scsi_sas_internal.h"
34
35/* ---------- Basic task processing for discovery purposes ---------- */
36
37void sas_init_dev(struct domain_device *dev)
38{
39 INIT_LIST_HEAD(&dev->siblings);
40 INIT_LIST_HEAD(&dev->dev_list_node);
41 switch (dev->dev_type) {
42 case SAS_END_DEV:
43 break;
44 case EDGE_DEV:
45 case FANOUT_DEV:
46 INIT_LIST_HEAD(&dev->ex_dev.children);
47 break;
48 case SATA_DEV:
49 case SATA_PM:
50 case SATA_PM_PORT:
51 INIT_LIST_HEAD(&dev->sata_dev.children);
52 break;
53 default:
54 break;
55 }
56}
57
58static void sas_task_timedout(unsigned long _task)
59{
60 struct sas_task *task = (void *) _task;
61 unsigned long flags;
62
63 spin_lock_irqsave(&task->task_state_lock, flags);
64 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
65 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
66 spin_unlock_irqrestore(&task->task_state_lock, flags);
67
68 complete(&task->completion);
69}
70
71static void sas_disc_task_done(struct sas_task *task)
72{
73 if (!del_timer(&task->timer))
74 return;
75 complete(&task->completion);
76}
77
78#define SAS_DEV_TIMEOUT 10
79
80/**
81 * sas_execute_task -- Basic task processing for discovery
82 * @task: the task to be executed
83 * @buffer: pointer to buffer to do I/O
84 * @size: size of @buffer
85 * @pci_dma_dir: PCI_DMA_...
86 */
87static int sas_execute_task(struct sas_task *task, void *buffer, int size,
88 int pci_dma_dir)
89{
90 int res = 0;
91 struct scatterlist *scatter = NULL;
92 struct task_status_struct *ts = &task->task_status;
93 int num_scatter = 0;
94 int retries = 0;
95 struct sas_internal *i =
96 to_sas_internal(task->dev->port->ha->core.shost->transportt);
97
98 if (pci_dma_dir != PCI_DMA_NONE) {
99 scatter = kzalloc(sizeof(*scatter), GFP_KERNEL);
100 if (!scatter)
101 goto out;
102
103 sg_init_one(scatter, buffer, size);
104 num_scatter = 1;
105 }
106
107 task->task_proto = task->dev->tproto;
108 task->scatter = scatter;
109 task->num_scatter = num_scatter;
110 task->total_xfer_len = size;
111 task->data_dir = pci_dma_dir;
112 task->task_done = sas_disc_task_done;
113
114 for (retries = 0; retries < 5; retries++) {
115 task->task_state_flags = SAS_TASK_STATE_PENDING;
116 init_completion(&task->completion);
117
118 task->timer.data = (unsigned long) task;
119 task->timer.function = sas_task_timedout;
120 task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ;
121 add_timer(&task->timer);
122
123 res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
124 if (res) {
125 del_timer(&task->timer);
126 SAS_DPRINTK("executing SAS discovery task failed:%d\n",
127 res);
128 goto ex_err;
129 }
130 wait_for_completion(&task->completion);
131 res = -ETASK;
132 if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
133 int res2;
134 SAS_DPRINTK("task aborted, flags:0x%x\n",
135 task->task_state_flags);
136 res2 = i->dft->lldd_abort_task(task);
137 SAS_DPRINTK("came back from abort task\n");
138 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
139 if (res2 == TMF_RESP_FUNC_COMPLETE)
140 continue; /* Retry the task */
141 else
142 goto ex_err;
143 }
144 }
145 if (task->task_status.stat == SAM_BUSY ||
146 task->task_status.stat == SAM_TASK_SET_FULL ||
147 task->task_status.stat == SAS_QUEUE_FULL) {
148 SAS_DPRINTK("task: q busy, sleeping...\n");
149 schedule_timeout_interruptible(HZ);
150 } else if (task->task_status.stat == SAM_CHECK_COND) {
151 struct scsi_sense_hdr shdr;
152
153 if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size,
154 &shdr)) {
155 SAS_DPRINTK("couldn't normalize sense\n");
156 continue;
157 }
158 if ((shdr.sense_key == 6 && shdr.asc == 0x29) ||
159 (shdr.sense_key == 2 && shdr.asc == 4 &&
160 shdr.ascq == 1)) {
161 SAS_DPRINTK("device %016llx LUN: %016llx "
162 "powering up or not ready yet, "
163 "sleeping...\n",
164 SAS_ADDR(task->dev->sas_addr),
165 SAS_ADDR(task->ssp_task.LUN));
166
167 schedule_timeout_interruptible(5*HZ);
168 } else if (shdr.sense_key == 1) {
169 res = 0;
170 break;
171 } else if (shdr.sense_key == 5) {
172 break;
173 } else {
174 SAS_DPRINTK("dev %016llx LUN: %016llx "
175 "sense key:0x%x ASC:0x%x ASCQ:0x%x"
176 "\n",
177 SAS_ADDR(task->dev->sas_addr),
178 SAS_ADDR(task->ssp_task.LUN),
179 shdr.sense_key,
180 shdr.asc, shdr.ascq);
181 }
182 } else if (task->task_status.resp != SAS_TASK_COMPLETE ||
183 task->task_status.stat != SAM_GOOD) {
184 SAS_DPRINTK("task finished with resp:0x%x, "
185 "stat:0x%x\n",
186 task->task_status.resp,
187 task->task_status.stat);
188 goto ex_err;
189 } else {
190 res = 0;
191 break;
192 }
193 }
194ex_err:
195 if (pci_dma_dir != PCI_DMA_NONE)
196 kfree(scatter);
197out:
198 return res;
199}
200
201/* ---------- Domain device discovery ---------- */
202
203/**
204 * sas_get_port_device -- Discover devices which caused port creation
205 * @port: pointer to struct sas_port of interest
206 *
207 * Devices directly attached to a HA port, have no parent. This is
208 * how we know they are (domain) "root" devices. All other devices
209 * do, and should have their "parent" pointer set appropriately as
210 * soon as a child device is discovered.
211 */
212static int sas_get_port_device(struct asd_sas_port *port)
213{
214 unsigned long flags;
215 struct asd_sas_phy *phy;
216 struct sas_rphy *rphy;
217 struct domain_device *dev;
218
219 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
220 if (!dev)
221 return -ENOMEM;
222
223 spin_lock_irqsave(&port->phy_list_lock, flags);
224 if (list_empty(&port->phy_list)) {
225 spin_unlock_irqrestore(&port->phy_list_lock, flags);
226 kfree(dev);
227 return -ENODEV;
228 }
229 phy = container_of(port->phy_list.next, struct asd_sas_phy, port_phy_el);
230 spin_lock(&phy->frame_rcvd_lock);
231 memcpy(dev->frame_rcvd, phy->frame_rcvd, min(sizeof(dev->frame_rcvd),
232 (size_t)phy->frame_rcvd_size));
233 spin_unlock(&phy->frame_rcvd_lock);
234 spin_unlock_irqrestore(&port->phy_list_lock, flags);
235
236 if (dev->frame_rcvd[0] == 0x34 && port->oob_mode == SATA_OOB_MODE) {
237 struct dev_to_host_fis *fis =
238 (struct dev_to_host_fis *) dev->frame_rcvd;
239 if (fis->interrupt_reason == 1 && fis->lbal == 1 &&
240 fis->byte_count_low==0x69 && fis->byte_count_high == 0x96
241 && (fis->device & ~0x10) == 0)
242 dev->dev_type = SATA_PM;
243 else
244 dev->dev_type = SATA_DEV;
245 dev->tproto = SATA_PROTO;
246 } else {
247 struct sas_identify_frame *id =
248 (struct sas_identify_frame *) dev->frame_rcvd;
249 dev->dev_type = id->dev_type;
250 dev->iproto = id->initiator_bits;
251 dev->tproto = id->target_bits;
252 }
253
254 sas_init_dev(dev);
255
256 switch (dev->dev_type) {
257 case SAS_END_DEV:
258 rphy = sas_end_device_alloc(port->port);
259 break;
260 case EDGE_DEV:
261 rphy = sas_expander_alloc(port->port,
262 SAS_EDGE_EXPANDER_DEVICE);
263 break;
264 case FANOUT_DEV:
265 rphy = sas_expander_alloc(port->port,
266 SAS_FANOUT_EXPANDER_DEVICE);
267 break;
268 case SATA_DEV:
269 default:
270 printk("ERROR: Unidentified device type %d\n", dev->dev_type);
271 rphy = NULL;
272 break;
273 }
274
275 if (!rphy) {
276 kfree(dev);
277 return -ENODEV;
278 }
279 rphy->identify.phy_identifier = phy->phy->identify.phy_identifier;
280 memcpy(dev->sas_addr, port->attached_sas_addr, SAS_ADDR_SIZE);
281 sas_fill_in_rphy(dev, rphy);
282 sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
283 port->port_dev = dev;
284 dev->port = port;
285 dev->linkrate = port->linkrate;
286 dev->min_linkrate = port->linkrate;
287 dev->max_linkrate = port->linkrate;
288 dev->pathways = port->num_phys;
289 memset(port->disc.fanout_sas_addr, 0, SAS_ADDR_SIZE);
290 memset(port->disc.eeds_a, 0, SAS_ADDR_SIZE);
291 memset(port->disc.eeds_b, 0, SAS_ADDR_SIZE);
292 port->disc.max_level = 0;
293
294 dev->rphy = rphy;
295 spin_lock(&port->dev_list_lock);
296 list_add_tail(&dev->dev_list_node, &port->dev_list);
297 spin_unlock(&port->dev_list_lock);
298
299 return 0;
300}
301
302/* ---------- Discover and Revalidate ---------- */
303
304/* ---------- SATA ---------- */
305
306static void sas_get_ata_command_set(struct domain_device *dev)
307{
308 struct dev_to_host_fis *fis =
309 (struct dev_to_host_fis *) dev->frame_rcvd;
310
311 if ((fis->sector_count == 1 && /* ATA */
312 fis->lbal == 1 &&
313 fis->lbam == 0 &&
314 fis->lbah == 0 &&
315 fis->device == 0)
316 ||
317 (fis->sector_count == 0 && /* CE-ATA (mATA) */
318 fis->lbal == 0 &&
319 fis->lbam == 0xCE &&
320 fis->lbah == 0xAA &&
321 (fis->device & ~0x10) == 0))
322
323 dev->sata_dev.command_set = ATA_COMMAND_SET;
324
325 else if ((fis->interrupt_reason == 1 && /* ATAPI */
326 fis->lbal == 1 &&
327 fis->byte_count_low == 0x14 &&
328 fis->byte_count_high == 0xEB &&
329 (fis->device & ~0x10) == 0))
330
331 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
332
333 else if ((fis->sector_count == 1 && /* SEMB */
334 fis->lbal == 1 &&
335 fis->lbam == 0x3C &&
336 fis->lbah == 0xC3 &&
337 fis->device == 0)
338 ||
339 (fis->interrupt_reason == 1 && /* SATA PM */
340 fis->lbal == 1 &&
341 fis->byte_count_low == 0x69 &&
342 fis->byte_count_high == 0x96 &&
343 (fis->device & ~0x10) == 0))
344
345 /* Treat it as a superset? */
346 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
347}
348
349/**
350 * sas_issue_ata_cmd -- Basic SATA command processing for discovery
351 * @dev: the device to send the command to
352 * @command: the command register
353 * @features: the features register
354 * @buffer: pointer to buffer to do I/O
355 * @size: size of @buffer
356 * @pci_dma_dir: PCI_DMA_...
357 */
358static int sas_issue_ata_cmd(struct domain_device *dev, u8 command,
359 u8 features, void *buffer, int size,
360 int pci_dma_dir)
361{
362 int res = 0;
363 struct sas_task *task;
364 struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *)
365 &dev->frame_rcvd[0];
366
367 res = -ENOMEM;
368 task = sas_alloc_task(GFP_KERNEL);
369 if (!task)
370 goto out;
371
372 task->dev = dev;
373
374 task->ata_task.fis.command = command;
375 task->ata_task.fis.features = features;
376 task->ata_task.fis.device = d2h_fis->device;
377 task->ata_task.retry_count = 1;
378
379 res = sas_execute_task(task, buffer, size, pci_dma_dir);
380
381 sas_free_task(task);
382out:
383 return res;
384}
385
386static void sas_sata_propagate_sas_addr(struct domain_device *dev)
387{
388 unsigned long flags;
389 struct asd_sas_port *port = dev->port;
390 struct asd_sas_phy *phy;
391
392 BUG_ON(dev->parent);
393
394 memcpy(port->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
395 spin_lock_irqsave(&port->phy_list_lock, flags);
396 list_for_each_entry(phy, &port->phy_list, port_phy_el)
397 memcpy(phy->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
398 spin_unlock_irqrestore(&port->phy_list_lock, flags);
399}
400
401#define ATA_IDENTIFY_DEV 0xEC
402#define ATA_IDENTIFY_PACKET_DEV 0xA1
403#define ATA_SET_FEATURES 0xEF
404#define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07
405
406/**
407 * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV)
408 * @dev: STP/SATA device of interest (ATA/ATAPI)
409 *
410 * The LLDD has already been notified of this device, so that we can
411 * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY
412 * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its
413 * performance for this device.
414 */
415static int sas_discover_sata_dev(struct domain_device *dev)
416{
417 int res;
418 __le16 *identify_x;
419 u8 command;
420
421 identify_x = kzalloc(512, GFP_KERNEL);
422 if (!identify_x)
423 return -ENOMEM;
424
425 if (dev->sata_dev.command_set == ATA_COMMAND_SET) {
426 dev->sata_dev.identify_device = identify_x;
427 command = ATA_IDENTIFY_DEV;
428 } else {
429 dev->sata_dev.identify_packet_device = identify_x;
430 command = ATA_IDENTIFY_PACKET_DEV;
431 }
432
433 res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
434 PCI_DMA_FROMDEVICE);
435 if (res)
436 goto out_err;
437
438 /* lives on the media? */
439 if (le16_to_cpu(identify_x[0]) & 4) {
440 /* incomplete response */
441 SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to "
442 "dev %llx\n", SAS_ADDR(dev->sas_addr));
443 if (!le16_to_cpu(identify_x[83] & (1<<6)))
444 goto cont1;
445 res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES,
446 ATA_FEATURE_PUP_STBY_SPIN_UP,
447 NULL, 0, PCI_DMA_NONE);
448 if (res)
449 goto cont1;
450
451 schedule_timeout_interruptible(5*HZ); /* More time? */
452 res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
453 PCI_DMA_FROMDEVICE);
454 if (res)
455 goto out_err;
456 }
457cont1:
458 /* Get WWN */
459 if (dev->port->oob_mode != SATA_OOB_MODE) {
460 memcpy(dev->sas_addr, dev->sata_dev.rps_resp.rps.stp_sas_addr,
461 SAS_ADDR_SIZE);
462 } else if (dev->sata_dev.command_set == ATA_COMMAND_SET &&
463 (le16_to_cpu(dev->sata_dev.identify_device[108]) & 0xF000)
464 == 0x5000) {
465 int i;
466
467 for (i = 0; i < 4; i++) {
468 dev->sas_addr[2*i] =
469 (le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0xFF00) >> 8;
470 dev->sas_addr[2*i+1] =
471 le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0x00FF;
472 }
473 }
474 sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
475 if (!dev->parent)
476 sas_sata_propagate_sas_addr(dev);
477
478 /* XXX Hint: register this SATA device with SATL.
479 When this returns, dev->sata_dev->lu is alive and
480 present.
481 sas_satl_register_dev(dev);
482 */
483 return 0;
484out_err:
485 dev->sata_dev.identify_packet_device = NULL;
486 dev->sata_dev.identify_device = NULL;
487 kfree(identify_x);
488 return res;
489}
490
491static int sas_discover_sata_pm(struct domain_device *dev)
492{
493 return -ENODEV;
494}
495
496int sas_notify_lldd_dev_found(struct domain_device *dev)
497{
498 int res = 0;
499 struct sas_ha_struct *sas_ha = dev->port->ha;
500 struct Scsi_Host *shost = sas_ha->core.shost;
501 struct sas_internal *i = to_sas_internal(shost->transportt);
502
503 if (i->dft->lldd_dev_found) {
504 res = i->dft->lldd_dev_found(dev);
505 if (res) {
506 printk("sas: driver on pcidev %s cannot handle "
507 "device %llx, error:%d\n",
508 pci_name(sas_ha->pcidev),
509 SAS_ADDR(dev->sas_addr), res);
510 }
511 }
512 return res;
513}
514
515
516void sas_notify_lldd_dev_gone(struct domain_device *dev)
517{
518 struct sas_ha_struct *sas_ha = dev->port->ha;
519 struct Scsi_Host *shost = sas_ha->core.shost;
520 struct sas_internal *i = to_sas_internal(shost->transportt);
521
522 if (i->dft->lldd_dev_gone)
523 i->dft->lldd_dev_gone(dev);
524}
525
526/* ---------- Common/dispatchers ---------- */
527
528/**
529 * sas_discover_sata -- discover an STP/SATA domain device
530 * @dev: pointer to struct domain_device of interest
531 *
532 * First we notify the LLDD of this device, so we can send frames to
533 * it. Then depending on the type of device we call the appropriate
534 * discover functions. Once device discover is done, we notify the
535 * LLDD so that it can fine-tune its parameters for the device, by
536 * removing it and then adding it. That is, the second time around,
537 * the driver would have certain fields, that it is looking at, set.
538 * Finally we initialize the kobj so that the device can be added to
539 * the system at registration time. Devices directly attached to a HA
540 * port, have no parents. All other devices do, and should have their
541 * "parent" pointer set appropriately before calling this function.
542 */
543int sas_discover_sata(struct domain_device *dev)
544{
545 int res;
546
547 sas_get_ata_command_set(dev);
548
549 res = sas_notify_lldd_dev_found(dev);
550 if (res)
551 return res;
552
553 switch (dev->dev_type) {
554 case SATA_DEV:
555 res = sas_discover_sata_dev(dev);
556 break;
557 case SATA_PM:
558 res = sas_discover_sata_pm(dev);
559 break;
560 default:
561 break;
562 }
563
564 sas_notify_lldd_dev_gone(dev);
565 if (!res) {
566 sas_notify_lldd_dev_found(dev);
567 }
568 return res;
569}
570
571/**
572 * sas_discover_end_dev -- discover an end device (SSP, etc)
573 * @end: pointer to domain device of interest
574 *
575 * See comment in sas_discover_sata().
576 */
577int sas_discover_end_dev(struct domain_device *dev)
578{
579 int res;
580
581 res = sas_notify_lldd_dev_found(dev);
582 if (res)
583 return res;
584
585 res = sas_rphy_add(dev->rphy);
586 if (res)
587 goto out_err;
588
589 /* do this to get the end device port attributes which will have
590 * been scanned in sas_rphy_add */
591 sas_notify_lldd_dev_gone(dev);
592 sas_notify_lldd_dev_found(dev);
593
594 return 0;
595
596out_err:
597 sas_notify_lldd_dev_gone(dev);
598 return res;
599}
600
601/* ---------- Device registration and unregistration ---------- */
602
603static inline void sas_unregister_common_dev(struct domain_device *dev)
604{
605 sas_notify_lldd_dev_gone(dev);
606 if (!dev->parent)
607 dev->port->port_dev = NULL;
608 else
609 list_del_init(&dev->siblings);
610 list_del_init(&dev->dev_list_node);
611}
612
613void sas_unregister_dev(struct domain_device *dev)
614{
615 if (dev->rphy) {
616 sas_remove_children(&dev->rphy->dev);
617 sas_rphy_delete(dev->rphy);
618 dev->rphy = NULL;
619 }
620 if (dev->dev_type == EDGE_DEV || dev->dev_type == FANOUT_DEV) {
621 /* remove the phys and ports, everything else should be gone */
622 kfree(dev->ex_dev.ex_phy);
623 dev->ex_dev.ex_phy = NULL;
624 }
625 sas_unregister_common_dev(dev);
626}
627
628void sas_unregister_domain_devices(struct asd_sas_port *port)
629{
630 struct domain_device *dev, *n;
631
632 list_for_each_entry_safe_reverse(dev,n,&port->dev_list,dev_list_node)
633 sas_unregister_dev(dev);
634
635 port->port->rphy = NULL;
636
637}
638
639/* ---------- Discovery and Revalidation ---------- */
640
641/**
642 * sas_discover_domain -- discover the domain
643 * @port: port to the domain of interest
644 *
645 * NOTE: this process _must_ quit (return) as soon as any connection
646 * errors are encountered. Connection recovery is done elsewhere.
647 * Discover process only interrogates devices in order to discover the
648 * domain.
649 */
650static void sas_discover_domain(void *data)
651{
652 int error = 0;
653 struct asd_sas_port *port = data;
654
655 sas_begin_event(DISCE_DISCOVER_DOMAIN, &port->disc.disc_event_lock,
656 &port->disc.pending);
657
658 if (port->port_dev)
659 return ;
660 else {
661 error = sas_get_port_device(port);
662 if (error)
663 return;
664 }
665
666 SAS_DPRINTK("DOING DISCOVERY on port %d, pid:%d\n", port->id,
667 current->pid);
668
669 switch (port->port_dev->dev_type) {
670 case SAS_END_DEV:
671 error = sas_discover_end_dev(port->port_dev);
672 break;
673 case EDGE_DEV:
674 case FANOUT_DEV:
675 error = sas_discover_root_expander(port->port_dev);
676 break;
677 case SATA_DEV:
678 case SATA_PM:
679 error = sas_discover_sata(port->port_dev);
680 break;
681 default:
682 SAS_DPRINTK("unhandled device %d\n", port->port_dev->dev_type);
683 break;
684 }
685
686 if (error) {
687 kfree(port->port_dev); /* not kobject_register-ed yet */
688 port->port_dev = NULL;
689 }
690
691 SAS_DPRINTK("DONE DISCOVERY on port %d, pid:%d, result:%d\n", port->id,
692 current->pid, error);
693}
694
695static void sas_revalidate_domain(void *data)
696{
697 int res = 0;
698 struct asd_sas_port *port = data;
699
700 sas_begin_event(DISCE_REVALIDATE_DOMAIN, &port->disc.disc_event_lock,
701 &port->disc.pending);
702
703 SAS_DPRINTK("REVALIDATING DOMAIN on port %d, pid:%d\n", port->id,
704 current->pid);
705 if (port->port_dev)
706 res = sas_ex_revalidate_domain(port->port_dev);
707
708 SAS_DPRINTK("done REVALIDATING DOMAIN on port %d, pid:%d, res 0x%x\n",
709 port->id, current->pid, res);
710}
711
712/* ---------- Events ---------- */
713
714int sas_discover_event(struct asd_sas_port *port, enum discover_event ev)
715{
716 struct sas_discovery *disc;
717
718 if (!port)
719 return 0;
720 disc = &port->disc;
721
722 BUG_ON(ev >= DISC_NUM_EVENTS);
723
724 sas_queue_event(ev, &disc->disc_event_lock, &disc->pending,
725 &disc->disc_work[ev], port->ha->core.shost);
726
727 return 0;
728}
729
730/**
731 * sas_init_disc -- initialize the discovery struct in the port
732 * @port: pointer to struct port
733 *
734 * Called when the ports are being initialized.
735 */
736void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *port)
737{
738 int i;
739
740 static void (*sas_event_fns[DISC_NUM_EVENTS])(void *) = {
741 [DISCE_DISCOVER_DOMAIN] = sas_discover_domain,
742 [DISCE_REVALIDATE_DOMAIN] = sas_revalidate_domain,
743 };
744
745 spin_lock_init(&disc->disc_event_lock);
746 disc->pending = 0;
747 for (i = 0; i < DISC_NUM_EVENTS; i++)
748 INIT_WORK(&disc->disc_work[i], sas_event_fns[i], port);
749}
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