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1 /* 1
2 * Serial Attached SCSI (SAS) Expander discove
3 *
4 * Copyright (C) 2005 Adaptec, Inc. All right
5 * Copyright (C) 2005 Luben Tuikov <luben_tuik
6 *
7 * This file is licensed under GPLv2.
8 *
9 * This program is free software; you can redi
10 * modify it under the terms of the GNU Genera
11 * published by the Free Software Foundation;
12 * License, or (at your option) any later vers
13 *
14 * This program is distributed in the hope tha
15 * WITHOUT ANY WARRANTY; without even the impl
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU
20 * along with this program; if not, write to t
21 * Foundation, Inc., 51 Franklin St, Fifth Flo
22 *
23 */
24
25 #include <linux/scatterlist.h>
26 #include <linux/blkdev.h>
27
28 #include "sas_internal.h"
29
30 #include <scsi/scsi_transport.h>
31 #include <scsi/scsi_transport_sas.h>
32 #include "../scsi_sas_internal.h"
33
34 static int sas_discover_expander(struct domain
35 static int sas_configure_routing(struct domain
36 static int sas_configure_phy(struct domain_dev
37 u8 *sas_addr, int
38 static int sas_disable_routing(struct domain_d
39
40 /* ---------- SMP task management ---------- *
41
42 static void smp_task_timedout(unsigned long _t
43 {
44 struct sas_task *task = (void *) _task
45 unsigned long flags;
46
47 spin_lock_irqsave(&task->task_state_lo
48 if (!(task->task_state_flags & SAS_TAS
49 task->task_state_flags |= SAS_
50 spin_unlock_irqrestore(&task->task_sta
51
52 complete(&task->completion);
53 }
54
55 static void smp_task_done(struct sas_task *tas
56 {
57 if (!del_timer(&task->timer))
58 return;
59 complete(&task->completion);
60 }
61
62 /* Give it some long enough timeout. In second
63 #define SMP_TIMEOUT 10
64
65 static int smp_execute_task(struct domain_devi
66 void *resp, int re
67 {
68 int res, retry;
69 struct sas_task *task = NULL;
70 struct sas_internal *i =
71 to_sas_internal(dev->port->ha-
72
73 for (retry = 0; retry < 3; retry++) {
74 task = sas_alloc_task(GFP_KERN
75 if (!task)
76 return -ENOMEM;
77
78 task->dev = dev;
79 task->task_proto = dev->tproto
80 sg_init_one(&task->smp_task.sm
81 sg_init_one(&task->smp_task.sm
82
83 task->task_done = smp_task_don
84
85 task->timer.data = (unsigned l
86 task->timer.function = smp_tas
87 task->timer.expires = jiffies
88 add_timer(&task->timer);
89
90 res = i->dft->lldd_execute_tas
91
92 if (res) {
93 del_timer(&task->timer
94 SAS_DPRINTK("executing
95 goto ex_err;
96 }
97
98 wait_for_completion(&task->com
99 res = -ECOMM;
100 if ((task->task_state_flags &
101 SAS_DPRINTK("smp task
102 i->dft->lldd_abort_tas
103 if (!(task->task_state
104 SAS_DPRINTK("S
105 goto ex_err;
106 }
107 }
108 if (task->task_status.resp ==
109 task->task_status.stat ==
110 res = 0;
111 break;
112 } if (task->task_status.resp =
113 task->task_status.stat =
114 /* no error, but retur
115 * underrun */
116 res = task->task_statu
117 break;
118 } if (task->task_status.resp =
119 task->task_status.stat =
120 res = -EMSGSIZE;
121 break;
122 } else {
123 SAS_DPRINTK("%s: task
124 "status 0x
125 SAS_ADDR(d
126 task->task
127 task->task
128 sas_free_task(task);
129 task = NULL;
130 }
131 }
132 ex_err:
133 BUG_ON(retry == 3 && task != NULL);
134 if (task != NULL) {
135 sas_free_task(task);
136 }
137 return res;
138 }
139
140 /* ---------- Allocations ---------- */
141
142 static inline void *alloc_smp_req(int size)
143 {
144 u8 *p = kzalloc(size, GFP_KERNEL);
145 if (p)
146 p[0] = SMP_REQUEST;
147 return p;
148 }
149
150 static inline void *alloc_smp_resp(int size)
151 {
152 return kzalloc(size, GFP_KERNEL);
153 }
154
155 /* ---------- Expander configuration ---------
156
157 static void sas_set_ex_phy(struct domain_devic
158 void *disc_resp)
159 {
160 struct expander_device *ex = &dev->ex_
161 struct ex_phy *phy = &ex->ex_phy[phy_i
162 struct smp_resp *resp = disc_resp;
163 struct discover_resp *dr = &resp->disc
164 struct sas_rphy *rphy = dev->rphy;
165 int rediscover = (phy->phy != NULL);
166
167 if (!rediscover) {
168 phy->phy = sas_phy_alloc(&rphy
169
170 /* FIXME: error_handling */
171 BUG_ON(!phy->phy);
172 }
173
174 switch (resp->result) {
175 case SMP_RESP_PHY_VACANT:
176 phy->phy_state = PHY_VACANT;
177 return;
178 default:
179 phy->phy_state = PHY_NOT_PRESE
180 return;
181 case SMP_RESP_FUNC_ACC:
182 phy->phy_state = PHY_EMPTY; /*
183 break;
184 }
185
186 phy->phy_id = phy_id;
187 phy->attached_dev_type = dr->attached_
188 phy->linkrate = dr->linkrate;
189 phy->attached_sata_host = dr->attached
190 phy->attached_sata_dev = dr->attached
191 phy->attached_sata_ps = dr->attached
192 phy->attached_iproto = dr->iproto << 1
193 phy->attached_tproto = dr->tproto << 1
194 memcpy(phy->attached_sas_addr, dr->att
195 phy->attached_phy_id = dr->attached_ph
196 phy->phy_change_count = dr->change_cou
197 phy->routing_attr = dr->routing_attr;
198 phy->virtual = dr->virtual;
199 phy->last_da_index = -1;
200
201 phy->phy->identify.initiator_port_prot
202 phy->phy->identify.target_port_protoco
203 phy->phy->identify.phy_identifier = ph
204 phy->phy->minimum_linkrate_hw = dr->hm
205 phy->phy->maximum_linkrate_hw = dr->hm
206 phy->phy->minimum_linkrate = dr->pmin_
207 phy->phy->maximum_linkrate = dr->pmax_
208 phy->phy->negotiated_linkrate = phy->l
209
210 if (!rediscover)
211 sas_phy_add(phy->phy);
212
213 SAS_DPRINTK("ex %016llx phy%02d:%c att
214 SAS_ADDR(dev->sas_addr), p
215 phy->routing_attr == TABLE
216 phy->routing_attr == DIREC
217 phy->routing_attr == SUBTR
218 SAS_ADDR(phy->attached_sas
219
220 return;
221 }
222
223 #define DISCOVER_REQ_SIZE 16
224 #define DISCOVER_RESP_SIZE 56
225
226 static int sas_ex_phy_discover_helper(struct d
227 u8 *disc
228 {
229 int i, res;
230
231 disc_req[9] = single;
232 for (i = 1 ; i < 3; i++) {
233 struct discover_resp *dr;
234
235 res = smp_execute_task(dev, di
236 disc_re
237 if (res)
238 return res;
239 /* This is detecting a failure
240 * dev to host FIS as describe
241 * sas-2 r 04b */
242 dr = &((struct smp_resp *)disc
243 if (!(dr->attached_dev_type ==
244 dr->attached_sata_dev))
245 break;
246 /* In order to generate the de
247 * send a link reset to the ex
248 sas_smp_phy_control(dev, singl
249 /* Wait for the reset to trigg
250 msleep(500);
251 }
252 sas_set_ex_phy(dev, single, disc_resp)
253 return 0;
254 }
255
256 static int sas_ex_phy_discover(struct domain_d
257 {
258 struct expander_device *ex = &dev->ex_
259 int res = 0;
260 u8 *disc_req;
261 u8 *disc_resp;
262
263 disc_req = alloc_smp_req(DISCOVER_REQ_
264 if (!disc_req)
265 return -ENOMEM;
266
267 disc_resp = alloc_smp_req(DISCOVER_RES
268 if (!disc_resp) {
269 kfree(disc_req);
270 return -ENOMEM;
271 }
272
273 disc_req[1] = SMP_DISCOVER;
274
275 if (0 <= single && single < ex->num_ph
276 res = sas_ex_phy_discover_help
277 } else {
278 int i;
279
280 for (i = 0; i < ex->num_phys;
281 res = sas_ex_phy_disco
282
283 if (res)
284 goto out_err;
285 }
286 }
287 out_err:
288 kfree(disc_resp);
289 kfree(disc_req);
290 return res;
291 }
292
293 static int sas_expander_discover(struct domain
294 {
295 struct expander_device *ex = &dev->ex_
296 int res = -ENOMEM;
297
298 ex->ex_phy = kzalloc(sizeof(*ex->ex_ph
299 if (!ex->ex_phy)
300 return -ENOMEM;
301
302 res = sas_ex_phy_discover(dev, -1);
303 if (res)
304 goto out_err;
305
306 return 0;
307 out_err:
308 kfree(ex->ex_phy);
309 ex->ex_phy = NULL;
310 return res;
311 }
312
313 #define MAX_EXPANDER_PHYS 128
314
315 static void ex_assign_report_general(struct do
316 st
317 {
318 struct report_general_resp *rg = &resp
319
320 dev->ex_dev.ex_change_count = be16_to_
321 dev->ex_dev.max_route_indexes = be16_t
322 dev->ex_dev.num_phys = min(rg->num_phy
323 dev->ex_dev.conf_route_table = rg->con
324 dev->ex_dev.configuring = rg->configur
325 memcpy(dev->ex_dev.enclosure_logical_i
326 }
327
328 #define RG_REQ_SIZE 8
329 #define RG_RESP_SIZE 32
330
331 static int sas_ex_general(struct domain_device
332 {
333 u8 *rg_req;
334 struct smp_resp *rg_resp;
335 int res;
336 int i;
337
338 rg_req = alloc_smp_req(RG_REQ_SIZE);
339 if (!rg_req)
340 return -ENOMEM;
341
342 rg_resp = alloc_smp_resp(RG_RESP_SIZE)
343 if (!rg_resp) {
344 kfree(rg_req);
345 return -ENOMEM;
346 }
347
348 rg_req[1] = SMP_REPORT_GENERAL;
349
350 for (i = 0; i < 5; i++) {
351 res = smp_execute_task(dev, rg
352 RG_RESP
353
354 if (res) {
355 SAS_DPRINTK("RG to ex
356 SAS_ADDR(d
357 goto out;
358 } else if (rg_resp->result !=
359 SAS_DPRINTK("RG:ex %01
360 SAS_ADDR(d
361 res = rg_resp->result;
362 goto out;
363 }
364
365 ex_assign_report_general(dev,
366
367 if (dev->ex_dev.configuring) {
368 SAS_DPRINTK("RG: ex %l
369 SAS_ADDR(d
370 schedule_timeout_inter
371 } else
372 break;
373 }
374 out:
375 kfree(rg_req);
376 kfree(rg_resp);
377 return res;
378 }
379
380 static void ex_assign_manuf_info(struct domain
381 *_mi_r
382 {
383 u8 *mi_resp = _mi_resp;
384 struct sas_rphy *rphy = dev->rphy;
385 struct sas_expander_device *edev = rph
386
387 memcpy(edev->vendor_id, mi_resp + 12,
388 memcpy(edev->product_id, mi_resp + 20,
389 memcpy(edev->product_rev, mi_resp + 36
390 SAS_EXPANDER_PRODUCT_REV_LEN);
391
392 if (mi_resp[8] & 1) {
393 memcpy(edev->component_vendor_
394 SAS_EXPANDER_COMPONENT_
395 edev->component_id = mi_resp[4
396 edev->component_revision_id =
397 }
398 }
399
400 #define MI_REQ_SIZE 8
401 #define MI_RESP_SIZE 64
402
403 static int sas_ex_manuf_info(struct domain_dev
404 {
405 u8 *mi_req;
406 u8 *mi_resp;
407 int res;
408
409 mi_req = alloc_smp_req(MI_REQ_SIZE);
410 if (!mi_req)
411 return -ENOMEM;
412
413 mi_resp = alloc_smp_resp(MI_RESP_SIZE)
414 if (!mi_resp) {
415 kfree(mi_req);
416 return -ENOMEM;
417 }
418
419 mi_req[1] = SMP_REPORT_MANUF_INFO;
420
421 res = smp_execute_task(dev, mi_req, MI
422 if (res) {
423 SAS_DPRINTK("MI: ex %016llx fa
424 SAS_ADDR(dev->sas_
425 goto out;
426 } else if (mi_resp[2] != SMP_RESP_FUNC
427 SAS_DPRINTK("MI ex %016llx ret
428 SAS_ADDR(dev->sas_
429 goto out;
430 }
431
432 ex_assign_manuf_info(dev, mi_resp);
433 out:
434 kfree(mi_req);
435 kfree(mi_resp);
436 return res;
437 }
438
439 #define PC_REQ_SIZE 44
440 #define PC_RESP_SIZE 8
441
442 int sas_smp_phy_control(struct domain_device *
443 enum phy_func phy_func
444 struct sas_phy_linkrat
445 {
446 u8 *pc_req;
447 u8 *pc_resp;
448 int res;
449
450 pc_req = alloc_smp_req(PC_REQ_SIZE);
451 if (!pc_req)
452 return -ENOMEM;
453
454 pc_resp = alloc_smp_resp(PC_RESP_SIZE)
455 if (!pc_resp) {
456 kfree(pc_req);
457 return -ENOMEM;
458 }
459
460 pc_req[1] = SMP_PHY_CONTROL;
461 pc_req[9] = phy_id;
462 pc_req[10]= phy_func;
463 if (rates) {
464 pc_req[32] = rates->minimum_li
465 pc_req[33] = rates->maximum_li
466 }
467
468 res = smp_execute_task(dev, pc_req, PC
469
470 kfree(pc_resp);
471 kfree(pc_req);
472 return res;
473 }
474
475 static void sas_ex_disable_phy(struct domain_d
476 {
477 struct expander_device *ex = &dev->ex_
478 struct ex_phy *phy = &ex->ex_phy[phy_i
479
480 sas_smp_phy_control(dev, phy_id, PHY_F
481 phy->linkrate = SAS_PHY_DISABLED;
482 }
483
484 static void sas_ex_disable_port(struct domain_
485 {
486 struct expander_device *ex = &dev->ex_
487 int i;
488
489 for (i = 0; i < ex->num_phys; i++) {
490 struct ex_phy *phy = &ex->ex_p
491
492 if (phy->phy_state == PHY_VACA
493 phy->phy_state == PHY_NOT_
494 continue;
495
496 if (SAS_ADDR(phy->attached_sas
497 sas_ex_disable_phy(dev
498 }
499 }
500
501 static int sas_dev_present_in_domain(struct as
502 u8
503 {
504 struct domain_device *dev;
505
506 if (SAS_ADDR(port->sas_addr) == SAS_AD
507 return 1;
508 list_for_each_entry(dev, &port->dev_li
509 if (SAS_ADDR(dev->sas_addr) ==
510 return 1;
511 }
512 return 0;
513 }
514
515 #define RPEL_REQ_SIZE 16
516 #define RPEL_RESP_SIZE 32
517 int sas_smp_get_phy_events(struct sas_phy *phy
518 {
519 int res;
520 u8 *req;
521 u8 *resp;
522 struct sas_rphy *rphy = dev_to_rphy(ph
523 struct domain_device *dev = sas_find_d
524
525 req = alloc_smp_req(RPEL_REQ_SIZE);
526 if (!req)
527 return -ENOMEM;
528
529 resp = alloc_smp_resp(RPEL_RESP_SIZE);
530 if (!resp) {
531 kfree(req);
532 return -ENOMEM;
533 }
534
535 req[1] = SMP_REPORT_PHY_ERR_LOG;
536 req[9] = phy->number;
537
538 res = smp_execute_task(dev, req, RPEL_
539 resp, RPEL
540
541 if (!res)
542 goto out;
543
544 phy->invalid_dword_count = scsi_to_u32
545 phy->running_disparity_error_count = s
546 phy->loss_of_dword_sync_count = scsi_t
547 phy->phy_reset_problem_count = scsi_to
548
549 out:
550 kfree(resp);
551 return res;
552
553 }
554
555 #ifdef CONFIG_SCSI_SAS_ATA
556
557 #define RPS_REQ_SIZE 16
558 #define RPS_RESP_SIZE 60
559
560 static int sas_get_report_phy_sata(struct doma
561 int
562 stru
563 {
564 int res;
565 u8 *rps_req = alloc_smp_req(RPS_REQ_SI
566 u8 *resp = (u8 *)rps_resp;
567
568 if (!rps_req)
569 return -ENOMEM;
570
571 rps_req[1] = SMP_REPORT_PHY_SATA;
572 rps_req[9] = phy_id;
573
574 res = smp_execute_task(dev, rps_req, R
575 rps_resp,
576
577 /* 0x34 is the FIS type for the D2H fi
578 * standards cockup here. sas-2 expli
579 * should be encoded so that FIS type
580 * However, some expanders endian reve
581 * reversal here */
582 if (!res && resp[27] == 0x34 && resp[2
583 int i;
584
585 for (i = 0; i < 5; i++) {
586 int j = 24 + (i*4);
587 u8 a, b;
588 a = resp[j + 0];
589 b = resp[j + 1];
590 resp[j + 0] = resp[j +
591 resp[j + 1] = resp[j +
592 resp[j + 2] = b;
593 resp[j + 3] = a;
594 }
595 }
596
597 kfree(rps_req);
598 return res;
599 }
600 #endif
601
602 static void sas_ex_get_linkrate(struct domain_
603 struct
604 struct
605 {
606 struct expander_device *parent_ex = &p
607 struct sas_port *port;
608 int i;
609
610 child->pathways = 0;
611
612 port = parent_phy->port;
613
614 for (i = 0; i < parent_ex->num_phys; i
615 struct ex_phy *phy = &parent_e
616
617 if (phy->phy_state == PHY_VACA
618 phy->phy_state == PHY_NOT_
619 continue;
620
621 if (SAS_ADDR(phy->attached_sas
622 SAS_ADDR(child->sas_addr))
623
624 child->min_linkrate =
625
626 child->max_linkrate =
627
628 child->pathways++;
629 sas_port_add_phy(port,
630 }
631 }
632 child->linkrate = min(parent_phy->link
633 child->pathways = min(child->pathways,
634 }
635
636 static struct domain_device *sas_ex_discover_e
637 struct domain_device *parent, int phy_
638 {
639 struct expander_device *parent_ex = &p
640 struct ex_phy *phy = &parent_ex->ex_ph
641 struct domain_device *child = NULL;
642 struct sas_rphy *rphy;
643 int res;
644
645 if (phy->attached_sata_host || phy->at
646 return NULL;
647
648 child = kzalloc(sizeof(*child), GFP_KE
649 if (!child)
650 return NULL;
651
652 child->parent = parent;
653 child->port = parent->port;
654 child->iproto = phy->attached_iproto;
655 memcpy(child->sas_addr, phy->attached_
656 sas_hash_addr(child->hashed_sas_addr,
657 if (!phy->port) {
658 phy->port = sas_port_alloc(&pa
659 if (unlikely(!phy->port))
660 goto out_err;
661 if (unlikely(sas_port_add(phy-
662 sas_port_free(phy->por
663 goto out_err;
664 }
665 }
666 sas_ex_get_linkrate(parent, child, phy
667
668 #ifdef CONFIG_SCSI_SAS_ATA
669 if ((phy->attached_tproto & SAS_PROTOC
670 child->dev_type = SATA_DEV;
671 if (phy->attached_tproto & SAS
672 child->tproto = phy->a
673 if (phy->attached_sata_dev)
674 child->tproto |= SATA_
675 res = sas_get_report_phy_sata(
676
677 if (res) {
678 SAS_DPRINTK("report ph
679 "0x%x\n",
680 phy_id, re
681 goto out_free;
682 }
683 memcpy(child->frame_rcvd, &chi
684 sizeof(struct dev_to_ho
685
686 rphy = sas_end_device_alloc(ph
687 if (unlikely(!rphy))
688 goto out_free;
689
690 sas_init_dev(child);
691
692 child->rphy = rphy;
693
694 spin_lock_irq(&parent->port->d
695 list_add_tail(&child->dev_list
696 spin_unlock_irq(&parent->port-
697
698 res = sas_discover_sata(child)
699 if (res) {
700 SAS_DPRINTK("sas_disco
701 "%016llx:0
702 SAS_ADDR(c
703 SAS_ADDR(p
704 goto out_list_del;
705 }
706 } else
707 #endif
708 if (phy->attached_tproto & SAS_PROTO
709 child->dev_type = SAS_END_DEV;
710 rphy = sas_end_device_alloc(ph
711 /* FIXME: error handling */
712 if (unlikely(!rphy))
713 goto out_free;
714 child->tproto = phy->attached_
715 sas_init_dev(child);
716
717 child->rphy = rphy;
718 sas_fill_in_rphy(child, rphy);
719
720 spin_lock_irq(&parent->port->d
721 list_add_tail(&child->dev_list
722 spin_unlock_irq(&parent->port-
723
724 res = sas_discover_end_dev(chi
725 if (res) {
726 SAS_DPRINTK("sas_disco
727 "at %016ll
728 SAS_ADDR(c
729 SAS_ADDR(p
730 goto out_list_del;
731 }
732 } else {
733 SAS_DPRINTK("target proto 0x%x
734 phy->attached_tpro
735 phy_id);
736 goto out_free;
737 }
738
739 list_add_tail(&child->siblings, &paren
740 return child;
741
742 out_list_del:
743 sas_rphy_free(child->rphy);
744 child->rphy = NULL;
745 list_del(&child->dev_list_node);
746 out_free:
747 sas_port_delete(phy->port);
748 out_err:
749 phy->port = NULL;
750 kfree(child);
751 return NULL;
752 }
753
754 /* See if this phy is part of a wide port */
755 static int sas_ex_join_wide_port(struct domain
756 {
757 struct ex_phy *phy = &parent->ex_dev.e
758 int i;
759
760 for (i = 0; i < parent->ex_dev.num_phy
761 struct ex_phy *ephy = &parent-
762
763 if (ephy == phy)
764 continue;
765
766 if (!memcmp(phy->attached_sas_
767 SAS_ADDR_SIZE) &&
768 sas_port_add_phy(ephy-
769 phy->port = ephy->port
770 phy->phy_state = PHY_D
771 return 0;
772 }
773 }
774
775 return -ENODEV;
776 }
777
778 static struct domain_device *sas_ex_discover_e
779 struct domain_device *parent, int phy_
780 {
781 struct sas_expander_device *parent_ex
782 struct ex_phy *phy = &parent->ex_dev.e
783 struct domain_device *child = NULL;
784 struct sas_rphy *rphy;
785 struct sas_expander_device *edev;
786 struct asd_sas_port *port;
787 int res;
788
789 if (phy->routing_attr == DIRECT_ROUTIN
790 SAS_DPRINTK("ex %016llx:0x%x:D
791 "allowed\n",
792 SAS_ADDR(parent->s
793 SAS_ADDR(phy->atta
794 phy->attached_phy_
795 return NULL;
796 }
797 child = kzalloc(sizeof(*child), GFP_KE
798 if (!child)
799 return NULL;
800
801 phy->port = sas_port_alloc(&parent->rp
802 /* FIXME: better error handling */
803 BUG_ON(sas_port_add(phy->port) != 0);
804
805
806 switch (phy->attached_dev_type) {
807 case EDGE_DEV:
808 rphy = sas_expander_alloc(phy-
809 SAS_
810 break;
811 case FANOUT_DEV:
812 rphy = sas_expander_alloc(phy-
813 SAS_
814 break;
815 default:
816 rphy = NULL; /* shut gcc up
817 BUG();
818 }
819 port = parent->port;
820 child->rphy = rphy;
821 edev = rphy_to_expander_device(rphy);
822 child->dev_type = phy->attached_dev_ty
823 child->parent = parent;
824 child->port = port;
825 child->iproto = phy->attached_iproto;
826 child->tproto = phy->attached_tproto;
827 memcpy(child->sas_addr, phy->attached_
828 sas_hash_addr(child->hashed_sas_addr,
829 sas_ex_get_linkrate(parent, child, phy
830 edev->level = parent_ex->level + 1;
831 parent->port->disc.max_level = max(par
832 ede
833 sas_init_dev(child);
834 sas_fill_in_rphy(child, rphy);
835 sas_rphy_add(rphy);
836
837 spin_lock_irq(&parent->port->dev_list_
838 list_add_tail(&child->dev_list_node, &
839 spin_unlock_irq(&parent->port->dev_lis
840
841 res = sas_discover_expander(child);
842 if (res) {
843 kfree(child);
844 return NULL;
845 }
846 list_add_tail(&child->siblings, &paren
847 return child;
848 }
849
850 static int sas_ex_discover_dev(struct domain_d
851 {
852 struct expander_device *ex = &dev->ex_
853 struct ex_phy *ex_phy = &ex->ex_phy[ph
854 struct domain_device *child = NULL;
855 int res = 0;
856
857 /* Phy state */
858 if (ex_phy->linkrate == SAS_SATA_SPINU
859 if (!sas_smp_phy_control(dev,
860 res = sas_ex_phy_disco
861 if (res)
862 return res;
863 }
864
865 /* Parent and domain coherency */
866 if (!dev->parent && (SAS_ADDR(ex_phy->
867 SAS_ADDR(dev->por
868 sas_add_parent_port(dev, phy_i
869 return 0;
870 }
871 if (dev->parent && (SAS_ADDR(ex_phy->a
872 SAS_ADDR(dev->pare
873 sas_add_parent_port(dev, phy_i
874 if (ex_phy->routing_attr == TA
875 sas_configure_phy(dev,
876 return 0;
877 }
878
879 if (sas_dev_present_in_domain(dev->por
880 sas_ex_disable_port(dev, ex_ph
881
882 if (ex_phy->attached_dev_type == NO_DE
883 if (ex_phy->routing_attr == DI
884 memset(ex_phy->attache
885 sas_configure_routing(
886 }
887 return 0;
888 } else if (ex_phy->linkrate == SAS_LIN
889 return 0;
890
891 if (ex_phy->attached_dev_type != SAS_E
892 ex_phy->attached_dev_type != FANOU
893 ex_phy->attached_dev_type != EDGE_
894 SAS_DPRINTK("unknown device ty
895 "phy 0x%x\n", ex_p
896 SAS_ADDR(dev->sas_
897 phy_id);
898 return 0;
899 }
900
901 res = sas_configure_routing(dev, ex_ph
902 if (res) {
903 SAS_DPRINTK("configure routing
904 "reported 0x%x. Fo
905 SAS_ADDR(ex_phy->a
906 sas_disable_routing(dev, ex_ph
907 return res;
908 }
909
910 res = sas_ex_join_wide_port(dev, phy_i
911 if (!res) {
912 SAS_DPRINTK("Attaching ex phy%
913 phy_id, SAS_ADDR(e
914 return res;
915 }
916
917 switch (ex_phy->attached_dev_type) {
918 case SAS_END_DEV:
919 child = sas_ex_discover_end_de
920 break;
921 case FANOUT_DEV:
922 if (SAS_ADDR(dev->port->disc.f
923 SAS_DPRINTK("second fa
924 "attached
925 SAS_ADDR(e
926 ex_phy->at
927 SAS_ADDR(d
928 phy_id);
929 sas_ex_disable_phy(dev
930 break;
931 } else
932 memcpy(dev->port->disc
933 ex_phy->attache
934 /* fallthrough */
935 case EDGE_DEV:
936 child = sas_ex_discover_expand
937 break;
938 default:
939 break;
940 }
941
942 if (child) {
943 int i;
944
945 for (i = 0; i < ex->num_phys;
946 if (ex->ex_phy[i].phy_
947 ex->ex_phy[i].phy_
948 continue;
949 /*
950 * Due to races, the p
951 * wide port, so we ad
952 */
953 if (SAS_ADDR(ex->ex_ph
954 SAS_ADDR(child->sa
955 ex->ex_phy[i].
956 res = sas_ex_j
957 if (!res)
958 SAS_DP
959
960
961 }
962 }
963 res = 0;
964 }
965
966 return res;
967 }
968
969 static int sas_find_sub_addr(struct domain_dev
970 {
971 struct expander_device *ex = &dev->ex_
972 int i;
973
974 for (i = 0; i < ex->num_phys; i++) {
975 struct ex_phy *phy = &ex->ex_p
976
977 if (phy->phy_state == PHY_VACA
978 phy->phy_state == PHY_NOT_
979 continue;
980
981 if ((phy->attached_dev_type ==
982 phy->attached_dev_type ==
983 phy->routing_attr == SUBTR
984
985 memcpy(sub_addr, phy->
986
987 return 1;
988 }
989 }
990 return 0;
991 }
992
993 static int sas_check_level_subtractive_boundar
994 {
995 struct expander_device *ex = &dev->ex_
996 struct domain_device *child;
997 u8 sub_addr[8] = {0, };
998
999 list_for_each_entry(child, &ex->childr
1000 if (child->dev_type != EDGE_D
1001 child->dev_type != FANOUT
1002 continue;
1003 if (sub_addr[0] == 0) {
1004 sas_find_sub_addr(chi
1005 continue;
1006 } else {
1007 u8 s2[8];
1008
1009 if (sas_find_sub_addr
1010 (SAS_ADDR(sub_add
1011
1012 SAS_DPRINTK("
1013 "
1014 "
1015 S
1016 S
1017 S
1018 S
1019
1020 sas_ex_disabl
1021 }
1022 }
1023 }
1024 return 0;
1025 }
1026 /**
1027 * sas_ex_discover_devices -- discover device
1028 * dev: pointer to the expander domain device
1029 * single: if you want to do a single phy, el
1030 *
1031 * Configure this expander for use with its d
1032 * devices of this expander.
1033 */
1034 static int sas_ex_discover_devices(struct dom
1035 {
1036 struct expander_device *ex = &dev->ex
1037 int i = 0, end = ex->num_phys;
1038 int res = 0;
1039
1040 if (0 <= single && single < end) {
1041 i = single;
1042 end = i+1;
1043 }
1044
1045 for ( ; i < end; i++) {
1046 struct ex_phy *ex_phy = &ex->
1047
1048 if (ex_phy->phy_state == PHY_
1049 ex_phy->phy_state == PHY_
1050 ex_phy->phy_state == PHY_
1051 continue;
1052
1053 switch (ex_phy->linkrate) {
1054 case SAS_PHY_DISABLED:
1055 case SAS_PHY_RESET_PROBLEM:
1056 case SAS_SATA_PORT_SELECTOR:
1057 continue;
1058 default:
1059 res = sas_ex_discover
1060 if (res)
1061 break;
1062 continue;
1063 }
1064 }
1065
1066 if (!res)
1067 sas_check_level_subtractive_b
1068
1069 return res;
1070 }
1071
1072 static int sas_check_ex_subtractive_boundary(
1073 {
1074 struct expander_device *ex = &dev->ex
1075 int i;
1076 u8 *sub_sas_addr = NULL;
1077
1078 if (dev->dev_type != EDGE_DEV)
1079 return 0;
1080
1081 for (i = 0; i < ex->num_phys; i++) {
1082 struct ex_phy *phy = &ex->ex_
1083
1084 if (phy->phy_state == PHY_VAC
1085 phy->phy_state == PHY_NOT
1086 continue;
1087
1088 if ((phy->attached_dev_type =
1089 phy->attached_dev_type =
1090 phy->routing_attr == SUBT
1091
1092 if (!sub_sas_addr)
1093 sub_sas_addr
1094 else if (SAS_ADDR(sub
1095 SAS_ADDR(phy
1096
1097 SAS_DPRINTK("
1098 "
1099 "
1100 S
1101 S
1102 S
1103 sas_ex_disabl
1104 }
1105 }
1106 }
1107 return 0;
1108 }
1109
1110 static void sas_print_parent_topology_bug(str
1111
1112
1113 {
1114 static const char ra_char[] = {
1115 [DIRECT_ROUTING] = 'D',
1116 [SUBTRACTIVE_ROUTING] = 'S',
1117 [TABLE_ROUTING] = 'T',
1118 };
1119 static const char *ex_type[] = {
1120 [EDGE_DEV] = "edge",
1121 [FANOUT_DEV] = "fanout",
1122 };
1123 struct domain_device *parent = child-
1124
1125 sas_printk("%s ex %016llx phy 0x%x <-
1126 "has %c:%c routing link!\n
1127
1128 ex_type[parent->dev_type],
1129 SAS_ADDR(parent->sas_addr)
1130 parent_phy->phy_id,
1131
1132 ex_type[child->dev_type],
1133 SAS_ADDR(child->sas_addr),
1134 child_phy->phy_id,
1135
1136 ra_char[parent_phy->routin
1137 ra_char[child_phy->routing
1138 }
1139
1140 static int sas_check_eeds(struct domain_devic
1141 struct ex_ph
1142 struct ex_ph
1143 {
1144 int res = 0;
1145 struct domain_device *parent = child-
1146
1147 if (SAS_ADDR(parent->port->disc.fanou
1148 res = -ENODEV;
1149 SAS_DPRINTK("edge ex %016llx
1150 "phy S:0x%x, whil
1151 SAS_ADDR(parent->
1152 parent_phy->phy_i
1153 SAS_ADDR(child->s
1154 child_phy->phy_id
1155 SAS_ADDR(parent->
1156 } else if (SAS_ADDR(parent->port->dis
1157 memcpy(parent->port->disc.eed
1158 SAS_ADDR_SIZE);
1159 memcpy(parent->port->disc.eed
1160 SAS_ADDR_SIZE);
1161 } else if (((SAS_ADDR(parent->port->d
1162 SAS_ADDR(parent->sas_addr
1163 (SAS_ADDR(parent->port->di
1164 SAS_ADDR(child->sas_addr)
1165 &&
1166 ((SAS_ADDR(parent->port->d
1167 SAS_ADDR(parent->sas_add
1168 (SAS_ADDR(parent->port->d
1169 SAS_ADDR(child->sas_addr
1170 ;
1171 else {
1172 res = -ENODEV;
1173 SAS_DPRINTK("edge ex %016llx
1174 "phy 0x%x link fo
1175 SAS_ADDR(parent->
1176 parent_phy->phy_i
1177 SAS_ADDR(child->s
1178 child_phy->phy_id
1179 }
1180
1181 return res;
1182 }
1183
1184 /* Here we spill over 80 columns. It is inte
1185 */
1186 static int sas_check_parent_topology(struct d
1187 {
1188 struct expander_device *child_ex = &c
1189 struct expander_device *parent_ex;
1190 int i;
1191 int res = 0;
1192
1193 if (!child->parent)
1194 return 0;
1195
1196 if (child->parent->dev_type != EDGE_D
1197 child->parent->dev_type != FANOUT
1198 return 0;
1199
1200 parent_ex = &child->parent->ex_dev;
1201
1202 for (i = 0; i < parent_ex->num_phys;
1203 struct ex_phy *parent_phy = &
1204 struct ex_phy *child_phy;
1205
1206 if (parent_phy->phy_state ==
1207 parent_phy->phy_state ==
1208 continue;
1209
1210 if (SAS_ADDR(parent_phy->atta
1211 continue;
1212
1213 child_phy = &child_ex->ex_phy
1214
1215 switch (child->parent->dev_ty
1216 case EDGE_DEV:
1217 if (child->dev_type =
1218 if (parent_ph
1219 child_phy
1220 sas_p
1221 res =
1222 }
1223 } else if (parent_phy
1224 if (child_phy
1225 res =
1226 } else if (ch
1227 sas_p
1228 res =
1229 }
1230 } else if (parent_phy
1231 child_phy-
1232 sas_print_par
1233 res = -ENODEV
1234 }
1235 break;
1236 case FANOUT_DEV:
1237 if (parent_phy->routi
1238 child_phy->routin
1239 sas_print_par
1240 res = -ENODEV
1241 }
1242 break;
1243 default:
1244 break;
1245 }
1246 }
1247
1248 return res;
1249 }
1250
1251 #define RRI_REQ_SIZE 16
1252 #define RRI_RESP_SIZE 44
1253
1254 static int sas_configure_present(struct domai
1255 u8 *sas_addr
1256 {
1257 int i, res = 0;
1258 struct expander_device *ex = &dev->ex
1259 struct ex_phy *phy = &ex->ex_phy[phy_
1260 u8 *rri_req;
1261 u8 *rri_resp;
1262
1263 *present = 0;
1264 *index = 0;
1265
1266 rri_req = alloc_smp_req(RRI_REQ_SIZE)
1267 if (!rri_req)
1268 return -ENOMEM;
1269
1270 rri_resp = alloc_smp_resp(RRI_RESP_SI
1271 if (!rri_resp) {
1272 kfree(rri_req);
1273 return -ENOMEM;
1274 }
1275
1276 rri_req[1] = SMP_REPORT_ROUTE_INFO;
1277 rri_req[9] = phy_id;
1278
1279 for (i = 0; i < ex->max_route_indexes
1280 *(__be16 *)(rri_req+6) = cpu_
1281 res = smp_execute_task(dev, r
1282 RRI_RE
1283 if (res)
1284 goto out;
1285 res = rri_resp[2];
1286 if (res == SMP_RESP_NO_INDEX)
1287 SAS_DPRINTK("overflow
1288 "phy 0x%x
1289 SAS_ADDR(
1290 goto out;
1291 } else if (res != SMP_RESP_FU
1292 SAS_DPRINTK("%s: dev
1293 "result 0
1294 SAS_ADDR(
1295 goto out;
1296 }
1297 if (SAS_ADDR(sas_addr) != 0)
1298 if (SAS_ADDR(rri_resp
1299 *index = i;
1300 if ((rri_resp
1301 *pres
1302 else
1303 *pres
1304 goto out;
1305 } else if (SAS_ADDR(r
1306 *index = i;
1307 *present = 0;
1308 goto out;
1309 }
1310 } else if (SAS_ADDR(rri_resp+
1311 phy->last_da_index
1312 phy->last_da_index =
1313 *index = i;
1314 *present = 0;
1315 goto out;
1316 }
1317 }
1318 res = -1;
1319 out:
1320 kfree(rri_req);
1321 kfree(rri_resp);
1322 return res;
1323 }
1324
1325 #define CRI_REQ_SIZE 44
1326 #define CRI_RESP_SIZE 8
1327
1328 static int sas_configure_set(struct domain_de
1329 u8 *sas_addr, in
1330 {
1331 int res;
1332 u8 *cri_req;
1333 u8 *cri_resp;
1334
1335 cri_req = alloc_smp_req(CRI_REQ_SIZE)
1336 if (!cri_req)
1337 return -ENOMEM;
1338
1339 cri_resp = alloc_smp_resp(CRI_RESP_SI
1340 if (!cri_resp) {
1341 kfree(cri_req);
1342 return -ENOMEM;
1343 }
1344
1345 cri_req[1] = SMP_CONF_ROUTE_INFO;
1346 *(__be16 *)(cri_req+6) = cpu_to_be16(
1347 cri_req[9] = phy_id;
1348 if (SAS_ADDR(sas_addr) == 0 || !inclu
1349 cri_req[12] |= 0x80;
1350 memcpy(cri_req+16, sas_addr, SAS_ADDR
1351
1352 res = smp_execute_task(dev, cri_req,
1353 CRI_RESP_SIZE)
1354 if (res)
1355 goto out;
1356 res = cri_resp[2];
1357 if (res == SMP_RESP_NO_INDEX) {
1358 SAS_DPRINTK("overflow of inde
1359 "index 0x%x\n",
1360 SAS_ADDR(dev->sas
1361 }
1362 out:
1363 kfree(cri_req);
1364 kfree(cri_resp);
1365 return res;
1366 }
1367
1368 static int sas_configure_phy(struct domain_de
1369 u8 *sas_a
1370 {
1371 int index;
1372 int present;
1373 int res;
1374
1375 res = sas_configure_present(dev, phy_
1376 if (res)
1377 return res;
1378 if (include ^ present)
1379 return sas_configure_set(dev,
1380
1381 return res;
1382 }
1383
1384 /**
1385 * sas_configure_parent -- configure routing
1386 * parent: parent expander
1387 * child: child expander
1388 * sas_addr: SAS port identifier of device di
1389 */
1390 static int sas_configure_parent(struct domain
1391 struct domain
1392 u8 *sas_addr,
1393 {
1394 struct expander_device *ex_parent = &
1395 int res = 0;
1396 int i;
1397
1398 if (parent->parent) {
1399 res = sas_configure_parent(pa
1400 in
1401 if (res)
1402 return res;
1403 }
1404
1405 if (ex_parent->conf_route_table == 0)
1406 SAS_DPRINTK("ex %016llx has s
1407 SAS_ADDR(parent->
1408 return 0;
1409 }
1410
1411 for (i = 0; i < ex_parent->num_phys;
1412 struct ex_phy *phy = &ex_pare
1413
1414 if ((phy->routing_attr == TAB
1415 (SAS_ADDR(phy->attached_s
1416 SAS_ADDR(child->sas_addr
1417 res = sas_configure_p
1418 if (res)
1419 return res;
1420 }
1421 }
1422
1423 return res;
1424 }
1425
1426 /**
1427 * sas_configure_routing -- configure routing
1428 * dev: expander device
1429 * sas_addr: port identifier of device direct
1430 */
1431 static int sas_configure_routing(struct domai
1432 {
1433 if (dev->parent)
1434 return sas_configure_parent(d
1435 return 0;
1436 }
1437
1438 static int sas_disable_routing(struct domain_
1439 {
1440 if (dev->parent)
1441 return sas_configure_parent(d
1442 return 0;
1443 }
1444
1445 /**
1446 * sas_discover_expander -- expander discover
1447 * @ex: pointer to expander domain device
1448 *
1449 * See comment in sas_discover_sata().
1450 */
1451 static int sas_discover_expander(struct domai
1452 {
1453 int res;
1454
1455 res = sas_notify_lldd_dev_found(dev);
1456 if (res)
1457 return res;
1458
1459 res = sas_ex_general(dev);
1460 if (res)
1461 goto out_err;
1462 res = sas_ex_manuf_info(dev);
1463 if (res)
1464 goto out_err;
1465
1466 res = sas_expander_discover(dev);
1467 if (res) {
1468 SAS_DPRINTK("expander %016llx
1469 SAS_ADDR(dev->sas
1470 goto out_err;
1471 }
1472
1473 sas_check_ex_subtractive_boundary(dev
1474 res = sas_check_parent_topology(dev);
1475 if (res)
1476 goto out_err;
1477 return 0;
1478 out_err:
1479 sas_notify_lldd_dev_gone(dev);
1480 return res;
1481 }
1482
1483 static int sas_ex_level_discovery(struct asd_
1484 {
1485 int res = 0;
1486 struct domain_device *dev;
1487
1488 list_for_each_entry(dev, &port->dev_l
1489 if (dev->dev_type == EDGE_DEV
1490 dev->dev_type == FANOUT_D
1491 struct sas_expander_d
1492 rphy_to_expan
1493
1494 if (level == ex->leve
1495 res = sas_ex_
1496 else if (level > 0)
1497 res = sas_ex_
1498
1499 }
1500 }
1501
1502 return res;
1503 }
1504
1505 static int sas_ex_bfs_disc(struct asd_sas_por
1506 {
1507 int res;
1508 int level;
1509
1510 do {
1511 level = port->disc.max_level;
1512 res = sas_ex_level_discovery(
1513 mb();
1514 } while (level < port->disc.max_level
1515
1516 return res;
1517 }
1518
1519 int sas_discover_root_expander(struct domain_
1520 {
1521 int res;
1522 struct sas_expander_device *ex = rphy
1523
1524 res = sas_rphy_add(dev->rphy);
1525 if (res)
1526 goto out_err;
1527
1528 ex->level = dev->port->disc.max_level
1529 res = sas_discover_expander(dev);
1530 if (res)
1531 goto out_err2;
1532
1533 sas_ex_bfs_disc(dev->port);
1534
1535 return res;
1536
1537 out_err2:
1538 sas_rphy_remove(dev->rphy);
1539 out_err:
1540 return res;
1541 }
1542
1543 /* ---------- Domain revalidation ----------
1544
1545 static int sas_get_phy_discover(struct domain
1546 int phy_id, s
1547 {
1548 int res;
1549 u8 *disc_req;
1550
1551 disc_req = alloc_smp_req(DISCOVER_REQ
1552 if (!disc_req)
1553 return -ENOMEM;
1554
1555 disc_req[1] = SMP_DISCOVER;
1556 disc_req[9] = phy_id;
1557
1558 res = smp_execute_task(dev, disc_req,
1559 disc_resp, DIS
1560 if (res)
1561 goto out;
1562 else if (disc_resp->result != SMP_RES
1563 res = disc_resp->result;
1564 goto out;
1565 }
1566 out:
1567 kfree(disc_req);
1568 return res;
1569 }
1570
1571 static int sas_get_phy_change_count(struct do
1572 int phy_i
1573 {
1574 int res;
1575 struct smp_resp *disc_resp;
1576
1577 disc_resp = alloc_smp_resp(DISCOVER_R
1578 if (!disc_resp)
1579 return -ENOMEM;
1580
1581 res = sas_get_phy_discover(dev, phy_i
1582 if (!res)
1583 *pcc = disc_resp->disc.change
1584
1585 kfree(disc_resp);
1586 return res;
1587 }
1588
1589 static int sas_get_phy_attached_sas_addr(stru
1590 int
1591 {
1592 int res;
1593 struct smp_resp *disc_resp;
1594 struct discover_resp *dr;
1595
1596 disc_resp = alloc_smp_resp(DISCOVER_R
1597 if (!disc_resp)
1598 return -ENOMEM;
1599 dr = &disc_resp->disc;
1600
1601 res = sas_get_phy_discover(dev, phy_i
1602 if (!res) {
1603 memcpy(attached_sas_addr,disc
1604 if (dr->attached_dev_type ==
1605 memset(attached_sas_a
1606 }
1607 kfree(disc_resp);
1608 return res;
1609 }
1610
1611 static int sas_find_bcast_phy(struct domain_d
1612 int from_phy, b
1613 {
1614 struct expander_device *ex = &dev->ex
1615 int res = 0;
1616 int i;
1617
1618 for (i = from_phy; i < ex->num_phys;
1619 int phy_change_count = 0;
1620
1621 res = sas_get_phy_change_coun
1622 if (res)
1623 goto out;
1624 else if (phy_change_count !=
1625 if (update)
1626 ex->ex_phy[i]
1627 phy_c
1628 *phy_id = i;
1629 return 0;
1630 }
1631 }
1632 out:
1633 return res;
1634 }
1635
1636 static int sas_get_ex_change_count(struct dom
1637 {
1638 int res;
1639 u8 *rg_req;
1640 struct smp_resp *rg_resp;
1641
1642 rg_req = alloc_smp_req(RG_REQ_SIZE);
1643 if (!rg_req)
1644 return -ENOMEM;
1645
1646 rg_resp = alloc_smp_resp(RG_RESP_SIZE
1647 if (!rg_resp) {
1648 kfree(rg_req);
1649 return -ENOMEM;
1650 }
1651
1652 rg_req[1] = SMP_REPORT_GENERAL;
1653
1654 res = smp_execute_task(dev, rg_req, R
1655 RG_RESP_SIZE);
1656 if (res)
1657 goto out;
1658 if (rg_resp->result != SMP_RESP_FUNC_
1659 res = rg_resp->result;
1660 goto out;
1661 }
1662
1663 *ecc = be16_to_cpu(rg_resp->rg.change
1664 out:
1665 kfree(rg_resp);
1666 kfree(rg_req);
1667 return res;
1668 }
1669 /**
1670 * sas_find_bcast_dev - find the device issu
1671 * @dev:domain device to be detect.
1672 * @src_dev: the device which originated BROA
1673 *
1674 * Add self-configuration expander suport. Su
1675 * when the first level expander is self-conf
1676 * second level expander, BROADCAST(CHANGE) w
1677 * in the second level expander, but also be
1678 * expander (see SAS protocol SAS 2r-14, 7.11
1679 * expander changed count in two level expand
1680 * once, but the phy which chang count has ch
1681 * we concerned.
1682 */
1683
1684 static int sas_find_bcast_dev(struct domain_d
1685 struct domain_d
1686 {
1687 struct expander_device *ex = &dev->ex
1688 int ex_change_count = -1;
1689 int phy_id = -1;
1690 int res;
1691 struct domain_device *ch;
1692
1693 res = sas_get_ex_change_count(dev, &e
1694 if (res)
1695 goto out;
1696 if (ex_change_count != -1 && ex_chang
1697 /* Just detect if this expand
1698 * in order to determine if th
1699 * and do not update phy chang
1700 */
1701 res = sas_find_bcast_phy(dev,
1702 if (phy_id != -1) {
1703 *src_dev = dev;
1704 ex->ex_change_count =
1705 SAS_DPRINTK("Expander
1706 return res;
1707 } else
1708 SAS_DPRINTK("Expander
1709 }
1710 list_for_each_entry(ch, &ex->children
1711 if (ch->dev_type == EDGE_DEV
1712 res = sas_find_bcast_
1713 if (src_dev)
1714 return res;
1715 }
1716 }
1717 out:
1718 return res;
1719 }
1720
1721 static void sas_unregister_ex_tree(struct dom
1722 {
1723 struct expander_device *ex = &dev->ex
1724 struct domain_device *child, *n;
1725
1726 list_for_each_entry_safe(child, n, &e
1727 if (child->dev_type == EDGE_D
1728 child->dev_type == FANOUT
1729 sas_unregister_ex_tre
1730 else
1731 sas_unregister_dev(ch
1732 }
1733 sas_unregister_dev(dev);
1734 }
1735
1736 static void sas_unregister_devs_sas_addr(stru
1737 int
1738 {
1739 struct expander_device *ex_dev = &par
1740 struct ex_phy *phy = &ex_dev->ex_phy[
1741 struct domain_device *child, *n;
1742 if (last) {
1743 list_for_each_entry_safe(chil
1744 &ex_dev->children, si
1745 if (SAS_ADDR(child->s
1746 SAS_ADDR(phy->att
1747 if (child->de
1748 child->de
1749 sas_u
1750 else
1751 sas_u
1752 break;
1753 }
1754 }
1755 sas_disable_routing(parent, p
1756 }
1757 memset(phy->attached_sas_addr, 0, SAS
1758 sas_port_delete_phy(phy->port, phy->p
1759 if (phy->port->num_phys == 0)
1760 sas_port_delete(phy->port);
1761 phy->port = NULL;
1762 }
1763
1764 static int sas_discover_bfs_by_root_level(str
1765 con
1766 {
1767 struct expander_device *ex_root = &ro
1768 struct domain_device *child;
1769 int res = 0;
1770
1771 list_for_each_entry(child, &ex_root->
1772 if (child->dev_type == EDGE_D
1773 child->dev_type == FANOUT
1774 struct sas_expander_d
1775 rphy_to_expan
1776
1777 if (level > ex->level
1778 res = sas_dis
1779
1780 else if (level == ex-
1781 res = sas_ex_
1782 }
1783 }
1784 return res;
1785 }
1786
1787 static int sas_discover_bfs_by_root(struct do
1788 {
1789 int res;
1790 struct sas_expander_device *ex = rphy
1791 int level = ex->level+1;
1792
1793 res = sas_ex_discover_devices(dev, -1
1794 if (res)
1795 goto out;
1796 do {
1797 res = sas_discover_bfs_by_roo
1798 mb();
1799 level += 1;
1800 } while (level <= dev->port->disc.max
1801 out:
1802 return res;
1803 }
1804
1805 static int sas_discover_new(struct domain_dev
1806 {
1807 struct ex_phy *ex_phy = &dev->ex_dev.
1808 struct domain_device *child;
1809 bool found = false;
1810 int res, i;
1811
1812 SAS_DPRINTK("ex %016llx phy%d new dev
1813 SAS_ADDR(dev->sas_addr),
1814 res = sas_ex_phy_discover(dev, phy_id
1815 if (res)
1816 goto out;
1817 /* to support the wide port inserted
1818 for (i = 0; i < dev->ex_dev.num_phys;
1819 struct ex_phy *ex_phy_temp =
1820 if (i == phy_id)
1821 continue;
1822 if (SAS_ADDR(ex_phy_temp->att
1823 SAS_ADDR(ex_phy->attached
1824 found = true;
1825 break;
1826 }
1827 }
1828 if (found) {
1829 sas_ex_join_wide_port(dev, ph
1830 return 0;
1831 }
1832 res = sas_ex_discover_devices(dev, ph
1833 if (!res)
1834 goto out;
1835 list_for_each_entry(child, &dev->ex_d
1836 if (SAS_ADDR(child->sas_addr)
1837 SAS_ADDR(ex_phy->attached
1838 if (child->dev_type =
1839 child->dev_type =
1840 res = sas_dis
1841 break;
1842 }
1843 }
1844 out:
1845 return res;
1846 }
1847
1848 static int sas_rediscover_dev(struct domain_d
1849 {
1850 struct expander_device *ex = &dev->ex
1851 struct ex_phy *phy = &ex->ex_phy[phy_
1852 u8 attached_sas_addr[8];
1853 int res;
1854
1855 res = sas_get_phy_attached_sas_addr(d
1856 switch (res) {
1857 case SMP_RESP_NO_PHY:
1858 phy->phy_state = PHY_NOT_PRES
1859 sas_unregister_devs_sas_addr(
1860 goto out; break;
1861 case SMP_RESP_PHY_VACANT:
1862 phy->phy_state = PHY_VACANT;
1863 sas_unregister_devs_sas_addr(
1864 goto out; break;
1865 case SMP_RESP_FUNC_ACC:
1866 break;
1867 }
1868
1869 if (SAS_ADDR(attached_sas_addr) == 0)
1870 phy->phy_state = PHY_EMPTY;
1871 sas_unregister_devs_sas_addr(
1872 } else if (SAS_ADDR(attached_sas_addr
1873 SAS_ADDR(phy->attached_sas
1874 SAS_DPRINTK("ex %016llx phy 0
1875 SAS_ADDR(dev->sas
1876 sas_ex_phy_discover(dev, phy_
1877 } else
1878 res = sas_discover_new(dev, p
1879 out:
1880 return res;
1881 }
1882
1883 /**
1884 * sas_rediscover - revalidate the domain.
1885 * @dev:domain device to be detect.
1886 * @phy_id: the phy id will be detected.
1887 *
1888 * NOTE: this process _must_ quit (return) as
1889 * errors are encountered. Connection recove
1890 * Discover process only interrogates devices
1891 * domain.For plugging out, we un-register th
1892 * the last phy in the port, for other phys i
1893 * from the port.For inserting, we do discove
1894 * first phy,for other phys in this port, we
1895 * forming the wide-port.
1896 */
1897 static int sas_rediscover(struct domain_devic
1898 {
1899 struct expander_device *ex = &dev->ex
1900 struct ex_phy *changed_phy = &ex->ex_
1901 int res = 0;
1902 int i;
1903 bool last = true; /* is this th
1904
1905 SAS_DPRINTK("ex %016llx phy%d origina
1906 SAS_ADDR(dev->sas_addr),
1907
1908 if (SAS_ADDR(changed_phy->attached_sa
1909 for (i = 0; i < ex->num_phys;
1910 struct ex_phy *phy =
1911
1912 if (i == phy_id)
1913 continue;
1914 if (SAS_ADDR(phy->att
1915 SAS_ADDR(changed_
1916 SAS_DPRINTK("
1917 "
1918 last = false;
1919 break;
1920 }
1921 }
1922 res = sas_rediscover_dev(dev,
1923 } else
1924 res = sas_discover_new(dev, p
1925 return res;
1926 }
1927
1928 /**
1929 * sas_revalidate_domain -- revalidate the do
1930 * @port: port to the domain of interest
1931 *
1932 * NOTE: this process _must_ quit (return) as
1933 * errors are encountered. Connection recove
1934 * Discover process only interrogates devices
1935 * domain.
1936 */
1937 int sas_ex_revalidate_domain(struct domain_de
1938 {
1939 int res;
1940 struct domain_device *dev = NULL;
1941
1942 res = sas_find_bcast_dev(port_dev, &d
1943 if (res)
1944 goto out;
1945 if (dev) {
1946 struct expander_device *ex =
1947 int i = 0, phy_id;
1948
1949 do {
1950 phy_id = -1;
1951 res = sas_find_bcast_
1952 if (phy_id == -1)
1953 break;
1954 res = sas_rediscover(
1955 i = phy_id + 1;
1956 } while (i < ex->num_phys);
1957 }
1958 out:
1959 return res;
1960 }
1961
1962 int sas_smp_handler(struct Scsi_Host *shost,
1963 struct request *req)
1964 {
1965 struct domain_device *dev;
1966 int ret, type;
1967 struct request *rsp = req->next_rq;
1968
1969 if (!rsp) {
1970 printk("%s: space for a smp r
1971 __func__);
1972 return -EINVAL;
1973 }
1974
1975 /* no rphy means no smp target suppor
1976 if (!rphy)
1977 return sas_smp_host_handler(s
1978
1979 type = rphy->identify.device_type;
1980
1981 if (type != SAS_EDGE_EXPANDER_DEVICE
1982 type != SAS_FANOUT_EXPANDER_DEVIC
1983 printk("%s: can we send a smp
1984 __func__);
1985 return -EINVAL;
1986 }
1987
1988 dev = sas_find_dev_by_rphy(rphy);
1989 if (!dev) {
1990 printk("%s: fail to find a do
1991 return -EINVAL;
1992 }
1993
1994 /* do we need to support multiple seg
1995 if (req->bio->bi_vcnt > 1 || rsp->bio
1996 printk("%s: multiple segments
1997 __func__, req->bio->bi
1998 rsp->bio->bi_vcnt, blk
1999 return -EINVAL;
2000 }
2001
2002 ret = smp_execute_task(dev, bio_data(
2003 bio_data(rsp->
2004 if (ret > 0) {
2005 /* positive number is the unt
2006 rsp->resid_len = ret;
2007 req->resid_len = 0;
2008 ret = 0;
2009 } else if (ret == 0) {
2010 rsp->resid_len = 0;
2011 req->resid_len = 0;
2012 }
2013
2014 return ret;
2015 }
2016
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