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[SCSI] libsas: Don't BUG when connecting two expanders via wide port
[linux-2.6/mini2440.git] / drivers / scsi / libsas / sas_expander.c
blobdc70c180e1155ee98c88ab0e7b03975190145d87
1 /*
2 * Serial Attached SCSI (SAS) Expander discovery and configuration
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
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_device *dev);
35 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr);
36 static int sas_configure_phy(struct domain_device *dev, int phy_id,
37 u8 *sas_addr, int include);
38 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr);
39
40 #if 0
41 /* FIXME: smp needs to migrate into the sas class */
42 static ssize_t smp_portal_read(struct kobject *, char *, loff_t, size_t);
43 static ssize_t smp_portal_write(struct kobject *, char *, loff_t, size_t);
44 #endif
45
46 /* ---------- SMP task management ---------- */
47
48 static void smp_task_timedout(unsigned long _task)
49 {
50 struct sas_task *task = (void *) _task;
51 unsigned long flags;
52
53 spin_lock_irqsave(&task->task_state_lock, flags);
54 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
55 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
56 spin_unlock_irqrestore(&task->task_state_lock, flags);
57
58 complete(&task->completion);
59 }
60
61 static void smp_task_done(struct sas_task *task)
62 {
63 if (!del_timer(&task->timer))
64 return;
65 complete(&task->completion);
66 }
67
68 /* Give it some long enough timeout. In seconds. */
69 #define SMP_TIMEOUT 10
70
71 static int smp_execute_task(struct domain_device *dev, void *req, int req_size,
72 void *resp, int resp_size)
73 {
74 int res, retry;
75 struct sas_task *task = NULL;
76 struct sas_internal *i =
77 to_sas_internal(dev->port->ha->core.shost->transportt);
78
79 for (retry = 0; retry < 3; retry++) {
80 task = sas_alloc_task(GFP_KERNEL);
81 if (!task)
82 return -ENOMEM;
83
84 task->dev = dev;
85 task->task_proto = dev->tproto;
86 sg_init_one(&task->smp_task.smp_req, req, req_size);
87 sg_init_one(&task->smp_task.smp_resp, resp, resp_size);
88
89 task->task_done = smp_task_done;
90
91 task->timer.data = (unsigned long) task;
92 task->timer.function = smp_task_timedout;
93 task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
94 add_timer(&task->timer);
95
96 res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
97
98 if (res) {
99 del_timer(&task->timer);
100 SAS_DPRINTK("executing SMP task failed:%d\n", res);
101 goto ex_err;
102 }
103
104 wait_for_completion(&task->completion);
105 res = -ETASK;
106 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
107 SAS_DPRINTK("smp task timed out or aborted\n");
108 i->dft->lldd_abort_task(task);
109 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
110 SAS_DPRINTK("SMP task aborted and not done\n");
111 goto ex_err;
112 }
113 }
114 if (task->task_status.resp == SAS_TASK_COMPLETE &&
115 task->task_status.stat == SAM_GOOD) {
116 res = 0;
117 break;
118 } else {
119 SAS_DPRINTK("%s: task to dev %016llx response: 0x%x "
120 "status 0x%x\n", __FUNCTION__,
121 SAS_ADDR(dev->sas_addr),
122 task->task_status.resp,
123 task->task_status.stat);
124 sas_free_task(task);
125 task = NULL;
126 }
127 }
128 ex_err:
129 BUG_ON(retry == 3 && task != NULL);
130 if (task != NULL) {
131 sas_free_task(task);
132 }
133 return res;
134 }
135
136 /* ---------- Allocations ---------- */
137
138 static inline void *alloc_smp_req(int size)
139 {
140 u8 *p = kzalloc(size, GFP_KERNEL);
141 if (p)
142 p[0] = SMP_REQUEST;
143 return p;
144 }
145
146 static inline void *alloc_smp_resp(int size)
147 {
148 return kzalloc(size, GFP_KERNEL);
149 }
150
151 /* ---------- Expander configuration ---------- */
152
153 static void sas_set_ex_phy(struct domain_device *dev, int phy_id,
154 void *disc_resp)
155 {
156 struct expander_device *ex = &dev->ex_dev;
157 struct ex_phy *phy = &ex->ex_phy[phy_id];
158 struct smp_resp *resp = disc_resp;
159 struct discover_resp *dr = &resp->disc;
160 struct sas_rphy *rphy = dev->rphy;
161 int rediscover = (phy->phy != NULL);
162
163 if (!rediscover) {
164 phy->phy = sas_phy_alloc(&rphy->dev, phy_id);
165
166 /* FIXME: error_handling */
167 BUG_ON(!phy->phy);
168 }
169
170 switch (resp->result) {
171 case SMP_RESP_PHY_VACANT:
172 phy->phy_state = PHY_VACANT;
173 return;
174 default:
175 phy->phy_state = PHY_NOT_PRESENT;
176 return;
177 case SMP_RESP_FUNC_ACC:
178 phy->phy_state = PHY_EMPTY; /* do not know yet */
179 break;
180 }
181
182 phy->phy_id = phy_id;
183 phy->attached_dev_type = dr->attached_dev_type;
184 phy->linkrate = dr->linkrate;
185 phy->attached_sata_host = dr->attached_sata_host;
186 phy->attached_sata_dev = dr->attached_sata_dev;
187 phy->attached_sata_ps = dr->attached_sata_ps;
188 phy->attached_iproto = dr->iproto << 1;
189 phy->attached_tproto = dr->tproto << 1;
190 memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE);
191 phy->attached_phy_id = dr->attached_phy_id;
192 phy->phy_change_count = dr->change_count;
193 phy->routing_attr = dr->routing_attr;
194 phy->virtual = dr->virtual;
195 phy->last_da_index = -1;
196
197 phy->phy->identify.initiator_port_protocols = phy->attached_iproto;
198 phy->phy->identify.target_port_protocols = phy->attached_tproto;
199 phy->phy->identify.phy_identifier = phy_id;
200 phy->phy->minimum_linkrate_hw = dr->hmin_linkrate;
201 phy->phy->maximum_linkrate_hw = dr->hmax_linkrate;
202 phy->phy->minimum_linkrate = dr->pmin_linkrate;
203 phy->phy->maximum_linkrate = dr->pmax_linkrate;
204 phy->phy->negotiated_linkrate = phy->linkrate;
205
206 if (!rediscover)
207 sas_phy_add(phy->phy);
208
209 SAS_DPRINTK("ex %016llx phy%02d:%c attached: %016llx\n",
210 SAS_ADDR(dev->sas_addr), phy->phy_id,
211 phy->routing_attr == TABLE_ROUTING ? 'T' :
212 phy->routing_attr == DIRECT_ROUTING ? 'D' :
213 phy->routing_attr == SUBTRACTIVE_ROUTING ? 'S' : '?',
214 SAS_ADDR(phy->attached_sas_addr));
215
216 return;
217 }
218
219 #define DISCOVER_REQ_SIZE 16
220 #define DISCOVER_RESP_SIZE 56
221
222 static int sas_ex_phy_discover(struct domain_device *dev, int single)
223 {
224 struct expander_device *ex = &dev->ex_dev;
225 int res = 0;
226 u8 *disc_req;
227 u8 *disc_resp;
228
229 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
230 if (!disc_req)
231 return -ENOMEM;
232
233 disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE);
234 if (!disc_resp) {
235 kfree(disc_req);
236 return -ENOMEM;
237 }
238
239 disc_req[1] = SMP_DISCOVER;
240
241 if (0 <= single && single < ex->num_phys) {
242 disc_req[9] = single;
243 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
244 disc_resp, DISCOVER_RESP_SIZE);
245 if (res)
246 goto out_err;
247 sas_set_ex_phy(dev, single, disc_resp);
248 } else {
249 int i;
250
251 for (i = 0; i < ex->num_phys; i++) {
252 disc_req[9] = i;
253 res = smp_execute_task(dev, disc_req,
254 DISCOVER_REQ_SIZE, disc_resp,
255 DISCOVER_RESP_SIZE);
256 if (res)
257 goto out_err;
258 sas_set_ex_phy(dev, i, disc_resp);
259 }
260 }
261 out_err:
262 kfree(disc_resp);
263 kfree(disc_req);
264 return res;
265 }
266
267 static int sas_expander_discover(struct domain_device *dev)
268 {
269 struct expander_device *ex = &dev->ex_dev;
270 int res = -ENOMEM;
271
272 ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL);
273 if (!ex->ex_phy)
274 return -ENOMEM;
275
276 res = sas_ex_phy_discover(dev, -1);
277 if (res)
278 goto out_err;
279
280 return 0;
281 out_err:
282 kfree(ex->ex_phy);
283 ex->ex_phy = NULL;
284 return res;
285 }
286
287 #define MAX_EXPANDER_PHYS 128
288
289 static void ex_assign_report_general(struct domain_device *dev,
290 struct smp_resp *resp)
291 {
292 struct report_general_resp *rg = &resp->rg;
293
294 dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count);
295 dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes);
296 dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS);
297 dev->ex_dev.conf_route_table = rg->conf_route_table;
298 dev->ex_dev.configuring = rg->configuring;
299 memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8);
300 }
301
302 #define RG_REQ_SIZE 8
303 #define RG_RESP_SIZE 32
304
305 static int sas_ex_general(struct domain_device *dev)
306 {
307 u8 *rg_req;
308 struct smp_resp *rg_resp;
309 int res;
310 int i;
311
312 rg_req = alloc_smp_req(RG_REQ_SIZE);
313 if (!rg_req)
314 return -ENOMEM;
315
316 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
317 if (!rg_resp) {
318 kfree(rg_req);
319 return -ENOMEM;
320 }
321
322 rg_req[1] = SMP_REPORT_GENERAL;
323
324 for (i = 0; i < 5; i++) {
325 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
326 RG_RESP_SIZE);
327
328 if (res) {
329 SAS_DPRINTK("RG to ex %016llx failed:0x%x\n",
330 SAS_ADDR(dev->sas_addr), res);
331 goto out;
332 } else if (rg_resp->result != SMP_RESP_FUNC_ACC) {
333 SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n",
334 SAS_ADDR(dev->sas_addr), rg_resp->result);
335 res = rg_resp->result;
336 goto out;
337 }
338
339 ex_assign_report_general(dev, rg_resp);
340
341 if (dev->ex_dev.configuring) {
342 SAS_DPRINTK("RG: ex %llx self-configuring...\n",
343 SAS_ADDR(dev->sas_addr));
344 schedule_timeout_interruptible(5*HZ);
345 } else
346 break;
347 }
348 out:
349 kfree(rg_req);
350 kfree(rg_resp);
351 return res;
352 }
353
354 static void ex_assign_manuf_info(struct domain_device *dev, void
355 *_mi_resp)
356 {
357 u8 *mi_resp = _mi_resp;
358 struct sas_rphy *rphy = dev->rphy;
359 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
360
361 memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN);
362 memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN);
363 memcpy(edev->product_rev, mi_resp + 36,
364 SAS_EXPANDER_PRODUCT_REV_LEN);
365
366 if (mi_resp[8] & 1) {
367 memcpy(edev->component_vendor_id, mi_resp + 40,
368 SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
369 edev->component_id = mi_resp[48] << 8 | mi_resp[49];
370 edev->component_revision_id = mi_resp[50];
371 }
372 }
373
374 #define MI_REQ_SIZE 8
375 #define MI_RESP_SIZE 64
376
377 static int sas_ex_manuf_info(struct domain_device *dev)
378 {
379 u8 *mi_req;
380 u8 *mi_resp;
381 int res;
382
383 mi_req = alloc_smp_req(MI_REQ_SIZE);
384 if (!mi_req)
385 return -ENOMEM;
386
387 mi_resp = alloc_smp_resp(MI_RESP_SIZE);
388 if (!mi_resp) {
389 kfree(mi_req);
390 return -ENOMEM;
391 }
392
393 mi_req[1] = SMP_REPORT_MANUF_INFO;
394
395 res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE);
396 if (res) {
397 SAS_DPRINTK("MI: ex %016llx failed:0x%x\n",
398 SAS_ADDR(dev->sas_addr), res);
399 goto out;
400 } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) {
401 SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n",
402 SAS_ADDR(dev->sas_addr), mi_resp[2]);
403 goto out;
404 }
405
406 ex_assign_manuf_info(dev, mi_resp);
407 out:
408 kfree(mi_req);
409 kfree(mi_resp);
410 return res;
411 }
412
413 #define PC_REQ_SIZE 44
414 #define PC_RESP_SIZE 8
415
416 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
417 enum phy_func phy_func,
418 struct sas_phy_linkrates *rates)
419 {
420 u8 *pc_req;
421 u8 *pc_resp;
422 int res;
423
424 pc_req = alloc_smp_req(PC_REQ_SIZE);
425 if (!pc_req)
426 return -ENOMEM;
427
428 pc_resp = alloc_smp_resp(PC_RESP_SIZE);
429 if (!pc_resp) {
430 kfree(pc_req);
431 return -ENOMEM;
432 }
433
434 pc_req[1] = SMP_PHY_CONTROL;
435 pc_req[9] = phy_id;
436 pc_req[10]= phy_func;
437 if (rates) {
438 pc_req[32] = rates->minimum_linkrate << 4;
439 pc_req[33] = rates->maximum_linkrate << 4;
440 }
441
442 res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE);
443
444 kfree(pc_resp);
445 kfree(pc_req);
446 return res;
447 }
448
449 static void sas_ex_disable_phy(struct domain_device *dev, int phy_id)
450 {
451 struct expander_device *ex = &dev->ex_dev;
452 struct ex_phy *phy = &ex->ex_phy[phy_id];
453
454 sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL);
455 phy->linkrate = SAS_PHY_DISABLED;
456 }
457
458 static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr)
459 {
460 struct expander_device *ex = &dev->ex_dev;
461 int i;
462
463 for (i = 0; i < ex->num_phys; i++) {
464 struct ex_phy *phy = &ex->ex_phy[i];
465
466 if (phy->phy_state == PHY_VACANT ||
467 phy->phy_state == PHY_NOT_PRESENT)
468 continue;
469
470 if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr))
471 sas_ex_disable_phy(dev, i);
472 }
473 }
474
475 static int sas_dev_present_in_domain(struct asd_sas_port *port,
476 u8 *sas_addr)
477 {
478 struct domain_device *dev;
479
480 if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr))
481 return 1;
482 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
483 if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr))
484 return 1;
485 }
486 return 0;
487 }
488
489 #define RPEL_REQ_SIZE 16
490 #define RPEL_RESP_SIZE 32
491 int sas_smp_get_phy_events(struct sas_phy *phy)
492 {
493 int res;
494 struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
495 struct domain_device *dev = sas_find_dev_by_rphy(rphy);
496 u8 *req = alloc_smp_req(RPEL_REQ_SIZE);
497 u8 *resp = kzalloc(RPEL_RESP_SIZE, GFP_KERNEL);
498
499 if (!resp)
500 return -ENOMEM;
501
502 req[1] = SMP_REPORT_PHY_ERR_LOG;
503 req[9] = phy->number;
504
505 res = smp_execute_task(dev, req, RPEL_REQ_SIZE,
506 resp, RPEL_RESP_SIZE);
507
508 if (!res)
509 goto out;
510
511 phy->invalid_dword_count = scsi_to_u32(&resp[12]);
512 phy->running_disparity_error_count = scsi_to_u32(&resp[16]);
513 phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]);
514 phy->phy_reset_problem_count = scsi_to_u32(&resp[24]);
515
516 out:
517 kfree(resp);
518 return res;
519
520 }
521
522 #define RPS_REQ_SIZE 16
523 #define RPS_RESP_SIZE 60
524
525 static int sas_get_report_phy_sata(struct domain_device *dev,
526 int phy_id,
527 struct smp_resp *rps_resp)
528 {
529 int res;
530 u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE);
531
532 if (!rps_req)
533 return -ENOMEM;
534
535 rps_req[1] = SMP_REPORT_PHY_SATA;
536 rps_req[9] = phy_id;
537
538 res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE,
539 rps_resp, RPS_RESP_SIZE);
540
541 kfree(rps_req);
542 return 0;
543 }
544
545 static void sas_ex_get_linkrate(struct domain_device *parent,
546 struct domain_device *child,
547 struct ex_phy *parent_phy)
548 {
549 struct expander_device *parent_ex = &parent->ex_dev;
550 struct sas_port *port;
551 int i;
552
553 child->pathways = 0;
554
555 port = parent_phy->port;
556
557 for (i = 0; i < parent_ex->num_phys; i++) {
558 struct ex_phy *phy = &parent_ex->ex_phy[i];
559
560 if (phy->phy_state == PHY_VACANT ||
561 phy->phy_state == PHY_NOT_PRESENT)
562 continue;
563
564 if (SAS_ADDR(phy->attached_sas_addr) ==
565 SAS_ADDR(child->sas_addr)) {
566
567 child->min_linkrate = min(parent->min_linkrate,
568 phy->linkrate);
569 child->max_linkrate = max(parent->max_linkrate,
570 phy->linkrate);
571 child->pathways++;
572 sas_port_add_phy(port, phy->phy);
573 }
574 }
575 child->linkrate = min(parent_phy->linkrate, child->max_linkrate);
576 child->pathways = min(child->pathways, parent->pathways);
577 }
578
579 static struct domain_device *sas_ex_discover_end_dev(
580 struct domain_device *parent, int phy_id)
581 {
582 struct expander_device *parent_ex = &parent->ex_dev;
583 struct ex_phy *phy = &parent_ex->ex_phy[phy_id];
584 struct domain_device *child = NULL;
585 struct sas_rphy *rphy;
586 int res;
587
588 if (phy->attached_sata_host || phy->attached_sata_ps)
589 return NULL;
590
591 child = kzalloc(sizeof(*child), GFP_KERNEL);
592 if (!child)
593 return NULL;
594
595 child->parent = parent;
596 child->port = parent->port;
597 child->iproto = phy->attached_iproto;
598 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
599 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
600 if (!phy->port) {
601 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
602 if (unlikely(!phy->port))
603 goto out_err;
604 if (unlikely(sas_port_add(phy->port) != 0)) {
605 sas_port_free(phy->port);
606 goto out_err;
607 }
608 }
609 sas_ex_get_linkrate(parent, child, phy);
610
611 if ((phy->attached_tproto & SAS_PROTO_STP) || phy->attached_sata_dev) {
612 child->dev_type = SATA_DEV;
613 if (phy->attached_tproto & SAS_PROTO_STP)
614 child->tproto = phy->attached_tproto;
615 if (phy->attached_sata_dev)
616 child->tproto |= SATA_DEV;
617 res = sas_get_report_phy_sata(parent, phy_id,
618 &child->sata_dev.rps_resp);
619 if (res) {
620 SAS_DPRINTK("report phy sata to %016llx:0x%x returned "
621 "0x%x\n", SAS_ADDR(parent->sas_addr),
622 phy_id, res);
623 goto out_free;
624 }
625 memcpy(child->frame_rcvd, &child->sata_dev.rps_resp.rps.fis,
626 sizeof(struct dev_to_host_fis));
627 sas_init_dev(child);
628 res = sas_discover_sata(child);
629 if (res) {
630 SAS_DPRINTK("sas_discover_sata() for device %16llx at "
631 "%016llx:0x%x returned 0x%x\n",
632 SAS_ADDR(child->sas_addr),
633 SAS_ADDR(parent->sas_addr), phy_id, res);
634 goto out_free;
635 }
636 } else if (phy->attached_tproto & SAS_PROTO_SSP) {
637 child->dev_type = SAS_END_DEV;
638 rphy = sas_end_device_alloc(phy->port);
639 /* FIXME: error handling */
640 if (unlikely(!rphy))
641 goto out_free;
642 child->tproto = phy->attached_tproto;
643 sas_init_dev(child);
644
645 child->rphy = rphy;
646 sas_fill_in_rphy(child, rphy);
647
648 spin_lock(&parent->port->dev_list_lock);
649 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
650 spin_unlock(&parent->port->dev_list_lock);
651
652 res = sas_discover_end_dev(child);
653 if (res) {
654 SAS_DPRINTK("sas_discover_end_dev() for device %16llx "
655 "at %016llx:0x%x returned 0x%x\n",
656 SAS_ADDR(child->sas_addr),
657 SAS_ADDR(parent->sas_addr), phy_id, res);
658 goto out_list_del;
659 }
660 } else {
661 SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n",
662 phy->attached_tproto, SAS_ADDR(parent->sas_addr),
663 phy_id);
664 }
665
666 list_add_tail(&child->siblings, &parent_ex->children);
667 return child;
668
669 out_list_del:
670 sas_rphy_free(child->rphy);
671 child->rphy = NULL;
672 list_del(&child->dev_list_node);
673 out_free:
674 sas_port_delete(phy->port);
675 out_err:
676 phy->port = NULL;
677 kfree(child);
678 return NULL;
679 }
680
681 /* See if this phy is part of a wide port */
682 static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id)
683 {
684 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
685 int i;
686
687 for (i = 0; i < parent->ex_dev.num_phys; i++) {
688 struct ex_phy *ephy = &parent->ex_dev.ex_phy[i];
689
690 if (ephy == phy)
691 continue;
692
693 if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr,
694 SAS_ADDR_SIZE) && ephy->port) {
695 sas_port_add_phy(ephy->port, phy->phy);
696 phy->phy_state = PHY_DEVICE_DISCOVERED;
697 return 0;
698 }
699 }
700
701 return -ENODEV;
702 }
703
704 static struct domain_device *sas_ex_discover_expander(
705 struct domain_device *parent, int phy_id)
706 {
707 struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy);
708 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
709 struct domain_device *child = NULL;
710 struct sas_rphy *rphy;
711 struct sas_expander_device *edev;
712 struct asd_sas_port *port;
713 int res;
714
715 if (phy->routing_attr == DIRECT_ROUTING) {
716 SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not "
717 "allowed\n",
718 SAS_ADDR(parent->sas_addr), phy_id,
719 SAS_ADDR(phy->attached_sas_addr),
720 phy->attached_phy_id);
721 return NULL;
722 }
723 child = kzalloc(sizeof(*child), GFP_KERNEL);
724 if (!child)
725 return NULL;
726
727 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
728 /* FIXME: better error handling */
729 BUG_ON(sas_port_add(phy->port) != 0);
730
731
732 switch (phy->attached_dev_type) {
733 case EDGE_DEV:
734 rphy = sas_expander_alloc(phy->port,
735 SAS_EDGE_EXPANDER_DEVICE);
736 break;
737 case FANOUT_DEV:
738 rphy = sas_expander_alloc(phy->port,
739 SAS_FANOUT_EXPANDER_DEVICE);
740 break;
741 default:
742 rphy = NULL; /* shut gcc up */
743 BUG();
744 }
745 port = parent->port;
746 child->rphy = rphy;
747 edev = rphy_to_expander_device(rphy);
748 child->dev_type = phy->attached_dev_type;
749 child->parent = parent;
750 child->port = port;
751 child->iproto = phy->attached_iproto;
752 child->tproto = phy->attached_tproto;
753 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
754 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
755 sas_ex_get_linkrate(parent, child, phy);
756 edev->level = parent_ex->level + 1;
757 parent->port->disc.max_level = max(parent->port->disc.max_level,
758 edev->level);
759 sas_init_dev(child);
760 sas_fill_in_rphy(child, rphy);
761 sas_rphy_add(rphy);
762
763 spin_lock(&parent->port->dev_list_lock);
764 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
765 spin_unlock(&parent->port->dev_list_lock);
766
767 res = sas_discover_expander(child);
768 if (res) {
769 kfree(child);
770 return NULL;
771 }
772 list_add_tail(&child->siblings, &parent->ex_dev.children);
773 return child;
774 }
775
776 static int sas_ex_discover_dev(struct domain_device *dev, int phy_id)
777 {
778 struct expander_device *ex = &dev->ex_dev;
779 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
780 struct domain_device *child = NULL;
781 int res = 0;
782
783 /* Phy state */
784 if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) {
785 if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL))
786 res = sas_ex_phy_discover(dev, phy_id);
787 if (res)
788 return res;
789 }
790
791 /* Parent and domain coherency */
792 if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
793 SAS_ADDR(dev->port->sas_addr))) {
794 sas_add_parent_port(dev, phy_id);
795 return 0;
796 }
797 if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
798 SAS_ADDR(dev->parent->sas_addr))) {
799 sas_add_parent_port(dev, phy_id);
800 if (ex_phy->routing_attr == TABLE_ROUTING)
801 sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1);
802 return 0;
803 }
804
805 if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr))
806 sas_ex_disable_port(dev, ex_phy->attached_sas_addr);
807
808 if (ex_phy->attached_dev_type == NO_DEVICE) {
809 if (ex_phy->routing_attr == DIRECT_ROUTING) {
810 memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
811 sas_configure_routing(dev, ex_phy->attached_sas_addr);
812 }
813 return 0;
814 } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN)
815 return 0;
816
817 if (ex_phy->attached_dev_type != SAS_END_DEV &&
818 ex_phy->attached_dev_type != FANOUT_DEV &&
819 ex_phy->attached_dev_type != EDGE_DEV) {
820 SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx "
821 "phy 0x%x\n", ex_phy->attached_dev_type,
822 SAS_ADDR(dev->sas_addr),
823 phy_id);
824 return 0;
825 }
826
827 res = sas_configure_routing(dev, ex_phy->attached_sas_addr);
828 if (res) {
829 SAS_DPRINTK("configure routing for dev %016llx "
830 "reported 0x%x. Forgotten\n",
831 SAS_ADDR(ex_phy->attached_sas_addr), res);
832 sas_disable_routing(dev, ex_phy->attached_sas_addr);
833 return res;
834 }
835
836 res = sas_ex_join_wide_port(dev, phy_id);
837 if (!res) {
838 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
839 phy_id, SAS_ADDR(ex_phy->attached_sas_addr));
840 return res;
841 }
842
843 switch (ex_phy->attached_dev_type) {
844 case SAS_END_DEV:
845 child = sas_ex_discover_end_dev(dev, phy_id);
846 break;
847 case FANOUT_DEV:
848 if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) {
849 SAS_DPRINTK("second fanout expander %016llx phy 0x%x "
850 "attached to ex %016llx phy 0x%x\n",
851 SAS_ADDR(ex_phy->attached_sas_addr),
852 ex_phy->attached_phy_id,
853 SAS_ADDR(dev->sas_addr),
854 phy_id);
855 sas_ex_disable_phy(dev, phy_id);
856 break;
857 } else
858 memcpy(dev->port->disc.fanout_sas_addr,
859 ex_phy->attached_sas_addr, SAS_ADDR_SIZE);
860 /* fallthrough */
861 case EDGE_DEV:
862 child = sas_ex_discover_expander(dev, phy_id);
863 break;
864 default:
865 break;
866 }
867
868 if (child) {
869 int i;
870
871 for (i = 0; i < ex->num_phys; i++) {
872 if (ex->ex_phy[i].phy_state == PHY_VACANT ||
873 ex->ex_phy[i].phy_state == PHY_NOT_PRESENT)
874 continue;
875
876 if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) ==
877 SAS_ADDR(child->sas_addr))
878 ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED;
879 }
880 }
881
882 return res;
883 }
884
885 static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr)
886 {
887 struct expander_device *ex = &dev->ex_dev;
888 int i;
889
890 for (i = 0; i < ex->num_phys; i++) {
891 struct ex_phy *phy = &ex->ex_phy[i];
892
893 if (phy->phy_state == PHY_VACANT ||
894 phy->phy_state == PHY_NOT_PRESENT)
895 continue;
896
897 if ((phy->attached_dev_type == EDGE_DEV ||
898 phy->attached_dev_type == FANOUT_DEV) &&
899 phy->routing_attr == SUBTRACTIVE_ROUTING) {
900
901 memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE);
902
903 return 1;
904 }
905 }
906 return 0;
907 }
908
909 static int sas_check_level_subtractive_boundary(struct domain_device *dev)
910 {
911 struct expander_device *ex = &dev->ex_dev;
912 struct domain_device *child;
913 u8 sub_addr[8] = {0, };
914
915 list_for_each_entry(child, &ex->children, siblings) {
916 if (child->dev_type != EDGE_DEV &&
917 child->dev_type != FANOUT_DEV)
918 continue;
919 if (sub_addr[0] == 0) {
920 sas_find_sub_addr(child, sub_addr);
921 continue;
922 } else {
923 u8 s2[8];
924
925 if (sas_find_sub_addr(child, s2) &&
926 (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) {
927
928 SAS_DPRINTK("ex %016llx->%016llx-?->%016llx "
929 "diverges from subtractive "
930 "boundary %016llx\n",
931 SAS_ADDR(dev->sas_addr),
932 SAS_ADDR(child->sas_addr),
933 SAS_ADDR(s2),
934 SAS_ADDR(sub_addr));
935
936 sas_ex_disable_port(child, s2);
937 }
938 }
939 }
940 return 0;
941 }
942 /**
943 * sas_ex_discover_devices -- discover devices attached to this expander
944 * dev: pointer to the expander domain device
945 * single: if you want to do a single phy, else set to -1;
946 *
947 * Configure this expander for use with its devices and register the
948 * devices of this expander.
949 */
950 static int sas_ex_discover_devices(struct domain_device *dev, int single)
951 {
952 struct expander_device *ex = &dev->ex_dev;
953 int i = 0, end = ex->num_phys;
954 int res = 0;
955
956 if (0 <= single && single < end) {
957 i = single;
958 end = i+1;
959 }
960
961 for ( ; i < end; i++) {
962 struct ex_phy *ex_phy = &ex->ex_phy[i];
963
964 if (ex_phy->phy_state == PHY_VACANT ||
965 ex_phy->phy_state == PHY_NOT_PRESENT ||
966 ex_phy->phy_state == PHY_DEVICE_DISCOVERED)
967 continue;
968
969 switch (ex_phy->linkrate) {
970 case SAS_PHY_DISABLED:
971 case SAS_PHY_RESET_PROBLEM:
972 case SAS_SATA_PORT_SELECTOR:
973 continue;
974 default:
975 res = sas_ex_discover_dev(dev, i);
976 if (res)
977 break;
978 continue;
979 }
980 }
981
982 if (!res)
983 sas_check_level_subtractive_boundary(dev);
984
985 return res;
986 }
987
988 static int sas_check_ex_subtractive_boundary(struct domain_device *dev)
989 {
990 struct expander_device *ex = &dev->ex_dev;
991 int i;
992 u8 *sub_sas_addr = NULL;
993
994 if (dev->dev_type != EDGE_DEV)
995 return 0;
996
997 for (i = 0; i < ex->num_phys; i++) {
998 struct ex_phy *phy = &ex->ex_phy[i];
999
1000 if (phy->phy_state == PHY_VACANT ||
1001 phy->phy_state == PHY_NOT_PRESENT)
1002 continue;
1003
1004 if ((phy->attached_dev_type == FANOUT_DEV ||
1005 phy->attached_dev_type == EDGE_DEV) &&
1006 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1007
1008 if (!sub_sas_addr)
1009 sub_sas_addr = &phy->attached_sas_addr[0];
1010 else if (SAS_ADDR(sub_sas_addr) !=
1011 SAS_ADDR(phy->attached_sas_addr)) {
1012
1013 SAS_DPRINTK("ex %016llx phy 0x%x "
1014 "diverges(%016llx) on subtractive "
1015 "boundary(%016llx). Disabled\n",
1016 SAS_ADDR(dev->sas_addr), i,
1017 SAS_ADDR(phy->attached_sas_addr),
1018 SAS_ADDR(sub_sas_addr));
1019 sas_ex_disable_phy(dev, i);
1020 }
1021 }
1022 }
1023 return 0;
1024 }
1025
1026 static void sas_print_parent_topology_bug(struct domain_device *child,
1027 struct ex_phy *parent_phy,
1028 struct ex_phy *child_phy)
1029 {
1030 static const char ra_char[] = {
1031 [DIRECT_ROUTING] = 'D',
1032 [SUBTRACTIVE_ROUTING] = 'S',
1033 [TABLE_ROUTING] = 'T',
1034 };
1035 static const char *ex_type[] = {
1036 [EDGE_DEV] = "edge",
1037 [FANOUT_DEV] = "fanout",
1038 };
1039 struct domain_device *parent = child->parent;
1040
1041 sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx phy 0x%x "
1042 "has %c:%c routing link!\n",
1043
1044 ex_type[parent->dev_type],
1045 SAS_ADDR(parent->sas_addr),
1046 parent_phy->phy_id,
1047
1048 ex_type[child->dev_type],
1049 SAS_ADDR(child->sas_addr),
1050 child_phy->phy_id,
1051
1052 ra_char[parent_phy->routing_attr],
1053 ra_char[child_phy->routing_attr]);
1054 }
1055
1056 static int sas_check_eeds(struct domain_device *child,
1057 struct ex_phy *parent_phy,
1058 struct ex_phy *child_phy)
1059 {
1060 int res = 0;
1061 struct domain_device *parent = child->parent;
1062
1063 if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) {
1064 res = -ENODEV;
1065 SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx "
1066 "phy S:0x%x, while there is a fanout ex %016llx\n",
1067 SAS_ADDR(parent->sas_addr),
1068 parent_phy->phy_id,
1069 SAS_ADDR(child->sas_addr),
1070 child_phy->phy_id,
1071 SAS_ADDR(parent->port->disc.fanout_sas_addr));
1072 } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) {
1073 memcpy(parent->port->disc.eeds_a, parent->sas_addr,
1074 SAS_ADDR_SIZE);
1075 memcpy(parent->port->disc.eeds_b, child->sas_addr,
1076 SAS_ADDR_SIZE);
1077 } else if (((SAS_ADDR(parent->port->disc.eeds_a) ==
1078 SAS_ADDR(parent->sas_addr)) ||
1079 (SAS_ADDR(parent->port->disc.eeds_a) ==
1080 SAS_ADDR(child->sas_addr)))
1081 &&
1082 ((SAS_ADDR(parent->port->disc.eeds_b) ==
1083 SAS_ADDR(parent->sas_addr)) ||
1084 (SAS_ADDR(parent->port->disc.eeds_b) ==
1085 SAS_ADDR(child->sas_addr))))
1086 ;
1087 else {
1088 res = -ENODEV;
1089 SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx "
1090 "phy 0x%x link forms a third EEDS!\n",
1091 SAS_ADDR(parent->sas_addr),
1092 parent_phy->phy_id,
1093 SAS_ADDR(child->sas_addr),
1094 child_phy->phy_id);
1095 }
1096
1097 return res;
1098 }
1099
1100 /* Here we spill over 80 columns. It is intentional.
1101 */
1102 static int sas_check_parent_topology(struct domain_device *child)
1103 {
1104 struct expander_device *child_ex = &child->ex_dev;
1105 struct expander_device *parent_ex;
1106 int i;
1107 int res = 0;
1108
1109 if (!child->parent)
1110 return 0;
1111
1112 if (child->parent->dev_type != EDGE_DEV &&
1113 child->parent->dev_type != FANOUT_DEV)
1114 return 0;
1115
1116 parent_ex = &child->parent->ex_dev;
1117
1118 for (i = 0; i < parent_ex->num_phys; i++) {
1119 struct ex_phy *parent_phy = &parent_ex->ex_phy[i];
1120 struct ex_phy *child_phy;
1121
1122 if (parent_phy->phy_state == PHY_VACANT ||
1123 parent_phy->phy_state == PHY_NOT_PRESENT)
1124 continue;
1125
1126 if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr))
1127 continue;
1128
1129 child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
1130
1131 switch (child->parent->dev_type) {
1132 case EDGE_DEV:
1133 if (child->dev_type == FANOUT_DEV) {
1134 if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING ||
1135 child_phy->routing_attr != TABLE_ROUTING) {
1136 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1137 res = -ENODEV;
1138 }
1139 } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1140 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1141 res = sas_check_eeds(child, parent_phy, child_phy);
1142 } else if (child_phy->routing_attr != TABLE_ROUTING) {
1143 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1144 res = -ENODEV;
1145 }
1146 } else if (parent_phy->routing_attr == TABLE_ROUTING &&
1147 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1148 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1149 res = -ENODEV;
1150 }
1151 break;
1152 case FANOUT_DEV:
1153 if (parent_phy->routing_attr != TABLE_ROUTING ||
1154 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1155 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1156 res = -ENODEV;
1157 }
1158 break;
1159 default:
1160 break;
1161 }
1162 }
1163
1164 return res;
1165 }
1166
1167 #define RRI_REQ_SIZE 16
1168 #define RRI_RESP_SIZE 44
1169
1170 static int sas_configure_present(struct domain_device *dev, int phy_id,
1171 u8 *sas_addr, int *index, int *present)
1172 {
1173 int i, res = 0;
1174 struct expander_device *ex = &dev->ex_dev;
1175 struct ex_phy *phy = &ex->ex_phy[phy_id];
1176 u8 *rri_req;
1177 u8 *rri_resp;
1178
1179 *present = 0;
1180 *index = 0;
1181
1182 rri_req = alloc_smp_req(RRI_REQ_SIZE);
1183 if (!rri_req)
1184 return -ENOMEM;
1185
1186 rri_resp = alloc_smp_resp(RRI_RESP_SIZE);
1187 if (!rri_resp) {
1188 kfree(rri_req);
1189 return -ENOMEM;
1190 }
1191
1192 rri_req[1] = SMP_REPORT_ROUTE_INFO;
1193 rri_req[9] = phy_id;
1194
1195 for (i = 0; i < ex->max_route_indexes ; i++) {
1196 *(__be16 *)(rri_req+6) = cpu_to_be16(i);
1197 res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp,
1198 RRI_RESP_SIZE);
1199 if (res)
1200 goto out;
1201 res = rri_resp[2];
1202 if (res == SMP_RESP_NO_INDEX) {
1203 SAS_DPRINTK("overflow of indexes: dev %016llx "
1204 "phy 0x%x index 0x%x\n",
1205 SAS_ADDR(dev->sas_addr), phy_id, i);
1206 goto out;
1207 } else if (res != SMP_RESP_FUNC_ACC) {
1208 SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x "
1209 "result 0x%x\n", __FUNCTION__,
1210 SAS_ADDR(dev->sas_addr), phy_id, i, res);
1211 goto out;
1212 }
1213 if (SAS_ADDR(sas_addr) != 0) {
1214 if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) {
1215 *index = i;
1216 if ((rri_resp[12] & 0x80) == 0x80)
1217 *present = 0;
1218 else
1219 *present = 1;
1220 goto out;
1221 } else if (SAS_ADDR(rri_resp+16) == 0) {
1222 *index = i;
1223 *present = 0;
1224 goto out;
1225 }
1226 } else if (SAS_ADDR(rri_resp+16) == 0 &&
1227 phy->last_da_index < i) {
1228 phy->last_da_index = i;
1229 *index = i;
1230 *present = 0;
1231 goto out;
1232 }
1233 }
1234 res = -1;
1235 out:
1236 kfree(rri_req);
1237 kfree(rri_resp);
1238 return res;
1239 }
1240
1241 #define CRI_REQ_SIZE 44
1242 #define CRI_RESP_SIZE 8
1243
1244 static int sas_configure_set(struct domain_device *dev, int phy_id,
1245 u8 *sas_addr, int index, int include)
1246 {
1247 int res;
1248 u8 *cri_req;
1249 u8 *cri_resp;
1250
1251 cri_req = alloc_smp_req(CRI_REQ_SIZE);
1252 if (!cri_req)
1253 return -ENOMEM;
1254
1255 cri_resp = alloc_smp_resp(CRI_RESP_SIZE);
1256 if (!cri_resp) {
1257 kfree(cri_req);
1258 return -ENOMEM;
1259 }
1260
1261 cri_req[1] = SMP_CONF_ROUTE_INFO;
1262 *(__be16 *)(cri_req+6) = cpu_to_be16(index);
1263 cri_req[9] = phy_id;
1264 if (SAS_ADDR(sas_addr) == 0 || !include)
1265 cri_req[12] |= 0x80;
1266 memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE);
1267
1268 res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp,
1269 CRI_RESP_SIZE);
1270 if (res)
1271 goto out;
1272 res = cri_resp[2];
1273 if (res == SMP_RESP_NO_INDEX) {
1274 SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x "
1275 "index 0x%x\n",
1276 SAS_ADDR(dev->sas_addr), phy_id, index);
1277 }
1278 out:
1279 kfree(cri_req);
1280 kfree(cri_resp);
1281 return res;
1282 }
1283
1284 static int sas_configure_phy(struct domain_device *dev, int phy_id,
1285 u8 *sas_addr, int include)
1286 {
1287 int index;
1288 int present;
1289 int res;
1290
1291 res = sas_configure_present(dev, phy_id, sas_addr, &index, &present);
1292 if (res)
1293 return res;
1294 if (include ^ present)
1295 return sas_configure_set(dev, phy_id, sas_addr, index,include);
1296
1297 return res;
1298 }
1299
1300 /**
1301 * sas_configure_parent -- configure routing table of parent
1302 * parent: parent expander
1303 * child: child expander
1304 * sas_addr: SAS port identifier of device directly attached to child
1305 */
1306 static int sas_configure_parent(struct domain_device *parent,
1307 struct domain_device *child,
1308 u8 *sas_addr, int include)
1309 {
1310 struct expander_device *ex_parent = &parent->ex_dev;
1311 int res = 0;
1312 int i;
1313
1314 if (parent->parent) {
1315 res = sas_configure_parent(parent->parent, parent, sas_addr,
1316 include);
1317 if (res)
1318 return res;
1319 }
1320
1321 if (ex_parent->conf_route_table == 0) {
1322 SAS_DPRINTK("ex %016llx has self-configuring routing table\n",
1323 SAS_ADDR(parent->sas_addr));
1324 return 0;
1325 }
1326
1327 for (i = 0; i < ex_parent->num_phys; i++) {
1328 struct ex_phy *phy = &ex_parent->ex_phy[i];
1329
1330 if ((phy->routing_attr == TABLE_ROUTING) &&
1331 (SAS_ADDR(phy->attached_sas_addr) ==
1332 SAS_ADDR(child->sas_addr))) {
1333 res = sas_configure_phy(parent, i, sas_addr, include);
1334 if (res)
1335 return res;
1336 }
1337 }
1338
1339 return res;
1340 }
1341
1342 /**
1343 * sas_configure_routing -- configure routing
1344 * dev: expander device
1345 * sas_addr: port identifier of device directly attached to the expander device
1346 */
1347 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr)
1348 {
1349 if (dev->parent)
1350 return sas_configure_parent(dev->parent, dev, sas_addr, 1);
1351 return 0;
1352 }
1353
1354 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr)
1355 {
1356 if (dev->parent)
1357 return sas_configure_parent(dev->parent, dev, sas_addr, 0);
1358 return 0;
1359 }
1360
1361 #if 0
1362 #define SMP_BIN_ATTR_NAME "smp_portal"
1363
1364 static void sas_ex_smp_hook(struct domain_device *dev)
1365 {
1366 struct expander_device *ex_dev = &dev->ex_dev;
1367 struct bin_attribute *bin_attr = &ex_dev->smp_bin_attr;
1368
1369 memset(bin_attr, 0, sizeof(*bin_attr));
1370
1371 bin_attr->attr.name = SMP_BIN_ATTR_NAME;
1372 bin_attr->attr.owner = THIS_MODULE;
1373 bin_attr->attr.mode = 0600;
1374
1375 bin_attr->size = 0;
1376 bin_attr->private = NULL;
1377 bin_attr->read = smp_portal_read;
1378 bin_attr->write= smp_portal_write;
1379 bin_attr->mmap = NULL;
1380
1381 ex_dev->smp_portal_pid = -1;
1382 init_MUTEX(&ex_dev->smp_sema);
1383 }
1384 #endif
1385
1386 /**
1387 * sas_discover_expander -- expander discovery
1388 * @ex: pointer to expander domain device
1389 *
1390 * See comment in sas_discover_sata().
1391 */
1392 static int sas_discover_expander(struct domain_device *dev)
1393 {
1394 int res;
1395
1396 res = sas_notify_lldd_dev_found(dev);
1397 if (res)
1398 return res;
1399
1400 res = sas_ex_general(dev);
1401 if (res)
1402 goto out_err;
1403 res = sas_ex_manuf_info(dev);
1404 if (res)
1405 goto out_err;
1406
1407 res = sas_expander_discover(dev);
1408 if (res) {
1409 SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n",
1410 SAS_ADDR(dev->sas_addr), res);
1411 goto out_err;
1412 }
1413
1414 sas_check_ex_subtractive_boundary(dev);
1415 res = sas_check_parent_topology(dev);
1416 if (res)
1417 goto out_err;
1418 return 0;
1419 out_err:
1420 sas_notify_lldd_dev_gone(dev);
1421 return res;
1422 }
1423
1424 static int sas_ex_level_discovery(struct asd_sas_port *port, const int level)
1425 {
1426 int res = 0;
1427 struct domain_device *dev;
1428
1429 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
1430 if (dev->dev_type == EDGE_DEV ||
1431 dev->dev_type == FANOUT_DEV) {
1432 struct sas_expander_device *ex =
1433 rphy_to_expander_device(dev->rphy);
1434
1435 if (level == ex->level)
1436 res = sas_ex_discover_devices(dev, -1);
1437 else if (level > 0)
1438 res = sas_ex_discover_devices(port->port_dev, -1);
1439
1440 }
1441 }
1442
1443 return res;
1444 }
1445
1446 static int sas_ex_bfs_disc(struct asd_sas_port *port)
1447 {
1448 int res;
1449 int level;
1450
1451 do {
1452 level = port->disc.max_level;
1453 res = sas_ex_level_discovery(port, level);
1454 mb();
1455 } while (level < port->disc.max_level);
1456
1457 return res;
1458 }
1459
1460 int sas_discover_root_expander(struct domain_device *dev)
1461 {
1462 int res;
1463 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1464
1465 res = sas_rphy_add(dev->rphy);
1466 if (res)
1467 goto out_err;
1468
1469 ex->level = dev->port->disc.max_level; /* 0 */
1470 res = sas_discover_expander(dev);
1471 if (res)
1472 goto out_err2;
1473
1474 sas_ex_bfs_disc(dev->port);
1475
1476 return res;
1477
1478 out_err2:
1479 sas_rphy_remove(dev->rphy);
1480 out_err:
1481 return res;
1482 }
1483
1484 /* ---------- Domain revalidation ---------- */
1485
1486 static int sas_get_phy_discover(struct domain_device *dev,
1487 int phy_id, struct smp_resp *disc_resp)
1488 {
1489 int res;
1490 u8 *disc_req;
1491
1492 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
1493 if (!disc_req)
1494 return -ENOMEM;
1495
1496 disc_req[1] = SMP_DISCOVER;
1497 disc_req[9] = phy_id;
1498
1499 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
1500 disc_resp, DISCOVER_RESP_SIZE);
1501 if (res)
1502 goto out;
1503 else if (disc_resp->result != SMP_RESP_FUNC_ACC) {
1504 res = disc_resp->result;
1505 goto out;
1506 }
1507 out:
1508 kfree(disc_req);
1509 return res;
1510 }
1511
1512 static int sas_get_phy_change_count(struct domain_device *dev,
1513 int phy_id, int *pcc)
1514 {
1515 int res;
1516 struct smp_resp *disc_resp;
1517
1518 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1519 if (!disc_resp)
1520 return -ENOMEM;
1521
1522 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1523 if (!res)
1524 *pcc = disc_resp->disc.change_count;
1525
1526 kfree(disc_resp);
1527 return res;
1528 }
1529
1530 static int sas_get_phy_attached_sas_addr(struct domain_device *dev,
1531 int phy_id, u8 *attached_sas_addr)
1532 {
1533 int res;
1534 struct smp_resp *disc_resp;
1535 struct discover_resp *dr;
1536
1537 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1538 if (!disc_resp)
1539 return -ENOMEM;
1540 dr = &disc_resp->disc;
1541
1542 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1543 if (!res) {
1544 memcpy(attached_sas_addr,disc_resp->disc.attached_sas_addr,8);
1545 if (dr->attached_dev_type == 0)
1546 memset(attached_sas_addr, 0, 8);
1547 }
1548 kfree(disc_resp);
1549 return res;
1550 }
1551
1552 static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id,
1553 int from_phy)
1554 {
1555 struct expander_device *ex = &dev->ex_dev;
1556 int res = 0;
1557 int i;
1558
1559 for (i = from_phy; i < ex->num_phys; i++) {
1560 int phy_change_count = 0;
1561
1562 res = sas_get_phy_change_count(dev, i, &phy_change_count);
1563 if (res)
1564 goto out;
1565 else if (phy_change_count != ex->ex_phy[i].phy_change_count) {
1566 ex->ex_phy[i].phy_change_count = phy_change_count;
1567 *phy_id = i;
1568 return 0;
1569 }
1570 }
1571 out:
1572 return res;
1573 }
1574
1575 static int sas_get_ex_change_count(struct domain_device *dev, int *ecc)
1576 {
1577 int res;
1578 u8 *rg_req;
1579 struct smp_resp *rg_resp;
1580
1581 rg_req = alloc_smp_req(RG_REQ_SIZE);
1582 if (!rg_req)
1583 return -ENOMEM;
1584
1585 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
1586 if (!rg_resp) {
1587 kfree(rg_req);
1588 return -ENOMEM;
1589 }
1590
1591 rg_req[1] = SMP_REPORT_GENERAL;
1592
1593 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
1594 RG_RESP_SIZE);
1595 if (res)
1596 goto out;
1597 if (rg_resp->result != SMP_RESP_FUNC_ACC) {
1598 res = rg_resp->result;
1599 goto out;
1600 }
1601
1602 *ecc = be16_to_cpu(rg_resp->rg.change_count);
1603 out:
1604 kfree(rg_resp);
1605 kfree(rg_req);
1606 return res;
1607 }
1608
1609 static int sas_find_bcast_dev(struct domain_device *dev,
1610 struct domain_device **src_dev)
1611 {
1612 struct expander_device *ex = &dev->ex_dev;
1613 int ex_change_count = -1;
1614 int res;
1615
1616 res = sas_get_ex_change_count(dev, &ex_change_count);
1617 if (res)
1618 goto out;
1619 if (ex_change_count != -1 &&
1620 ex_change_count != ex->ex_change_count) {
1621 *src_dev = dev;
1622 ex->ex_change_count = ex_change_count;
1623 } else {
1624 struct domain_device *ch;
1625
1626 list_for_each_entry(ch, &ex->children, siblings) {
1627 if (ch->dev_type == EDGE_DEV ||
1628 ch->dev_type == FANOUT_DEV) {
1629 res = sas_find_bcast_dev(ch, src_dev);
1630 if (src_dev)
1631 return res;
1632 }
1633 }
1634 }
1635 out:
1636 return res;
1637 }
1638
1639 static void sas_unregister_ex_tree(struct domain_device *dev)
1640 {
1641 struct expander_device *ex = &dev->ex_dev;
1642 struct domain_device *child, *n;
1643
1644 list_for_each_entry_safe(child, n, &ex->children, siblings) {
1645 if (child->dev_type == EDGE_DEV ||
1646 child->dev_type == FANOUT_DEV)
1647 sas_unregister_ex_tree(child);
1648 else
1649 sas_unregister_dev(child);
1650 }
1651 sas_unregister_dev(dev);
1652 }
1653
1654 static void sas_unregister_devs_sas_addr(struct domain_device *parent,
1655 int phy_id)
1656 {
1657 struct expander_device *ex_dev = &parent->ex_dev;
1658 struct ex_phy *phy = &ex_dev->ex_phy[phy_id];
1659 struct domain_device *child, *n;
1660
1661 list_for_each_entry_safe(child, n, &ex_dev->children, siblings) {
1662 if (SAS_ADDR(child->sas_addr) ==
1663 SAS_ADDR(phy->attached_sas_addr)) {
1664 if (child->dev_type == EDGE_DEV ||
1665 child->dev_type == FANOUT_DEV)
1666 sas_unregister_ex_tree(child);
1667 else
1668 sas_unregister_dev(child);
1669 break;
1670 }
1671 }
1672 sas_disable_routing(parent, phy->attached_sas_addr);
1673 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1674 sas_port_delete_phy(phy->port, phy->phy);
1675 if (phy->port->num_phys == 0)
1676 sas_port_delete(phy->port);
1677 phy->port = NULL;
1678 }
1679
1680 static int sas_discover_bfs_by_root_level(struct domain_device *root,
1681 const int level)
1682 {
1683 struct expander_device *ex_root = &root->ex_dev;
1684 struct domain_device *child;
1685 int res = 0;
1686
1687 list_for_each_entry(child, &ex_root->children, siblings) {
1688 if (child->dev_type == EDGE_DEV ||
1689 child->dev_type == FANOUT_DEV) {
1690 struct sas_expander_device *ex =
1691 rphy_to_expander_device(child->rphy);
1692
1693 if (level > ex->level)
1694 res = sas_discover_bfs_by_root_level(child,
1695 level);
1696 else if (level == ex->level)
1697 res = sas_ex_discover_devices(child, -1);
1698 }
1699 }
1700 return res;
1701 }
1702
1703 static int sas_discover_bfs_by_root(struct domain_device *dev)
1704 {
1705 int res;
1706 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1707 int level = ex->level+1;
1708
1709 res = sas_ex_discover_devices(dev, -1);
1710 if (res)
1711 goto out;
1712 do {
1713 res = sas_discover_bfs_by_root_level(dev, level);
1714 mb();
1715 level += 1;
1716 } while (level <= dev->port->disc.max_level);
1717 out:
1718 return res;
1719 }
1720
1721 static int sas_discover_new(struct domain_device *dev, int phy_id)
1722 {
1723 struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id];
1724 struct domain_device *child;
1725 int res;
1726
1727 SAS_DPRINTK("ex %016llx phy%d new device attached\n",
1728 SAS_ADDR(dev->sas_addr), phy_id);
1729 res = sas_ex_phy_discover(dev, phy_id);
1730 if (res)
1731 goto out;
1732 res = sas_ex_discover_devices(dev, phy_id);
1733 if (res)
1734 goto out;
1735 list_for_each_entry(child, &dev->ex_dev.children, siblings) {
1736 if (SAS_ADDR(child->sas_addr) ==
1737 SAS_ADDR(ex_phy->attached_sas_addr)) {
1738 if (child->dev_type == EDGE_DEV ||
1739 child->dev_type == FANOUT_DEV)
1740 res = sas_discover_bfs_by_root(child);
1741 break;
1742 }
1743 }
1744 out:
1745 return res;
1746 }
1747
1748 static int sas_rediscover_dev(struct domain_device *dev, int phy_id)
1749 {
1750 struct expander_device *ex = &dev->ex_dev;
1751 struct ex_phy *phy = &ex->ex_phy[phy_id];
1752 u8 attached_sas_addr[8];
1753 int res;
1754
1755 res = sas_get_phy_attached_sas_addr(dev, phy_id, attached_sas_addr);
1756 switch (res) {
1757 case SMP_RESP_NO_PHY:
1758 phy->phy_state = PHY_NOT_PRESENT;
1759 sas_unregister_devs_sas_addr(dev, phy_id);
1760 goto out; break;
1761 case SMP_RESP_PHY_VACANT:
1762 phy->phy_state = PHY_VACANT;
1763 sas_unregister_devs_sas_addr(dev, phy_id);
1764 goto out; break;
1765 case SMP_RESP_FUNC_ACC:
1766 break;
1767 }
1768
1769 if (SAS_ADDR(attached_sas_addr) == 0) {
1770 phy->phy_state = PHY_EMPTY;
1771 sas_unregister_devs_sas_addr(dev, phy_id);
1772 } else if (SAS_ADDR(attached_sas_addr) ==
1773 SAS_ADDR(phy->attached_sas_addr)) {
1774 SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n",
1775 SAS_ADDR(dev->sas_addr), phy_id);
1776 sas_ex_phy_discover(dev, phy_id);
1777 } else
1778 res = sas_discover_new(dev, phy_id);
1779 out:
1780 return res;
1781 }
1782
1783 static int sas_rediscover(struct domain_device *dev, const int phy_id)
1784 {
1785 struct expander_device *ex = &dev->ex_dev;
1786 struct ex_phy *changed_phy = &ex->ex_phy[phy_id];
1787 int res = 0;
1788 int i;
1789
1790 SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n",
1791 SAS_ADDR(dev->sas_addr), phy_id);
1792
1793 if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) {
1794 for (i = 0; i < ex->num_phys; i++) {
1795 struct ex_phy *phy = &ex->ex_phy[i];
1796
1797 if (i == phy_id)
1798 continue;
1799 if (SAS_ADDR(phy->attached_sas_addr) ==
1800 SAS_ADDR(changed_phy->attached_sas_addr)) {
1801 SAS_DPRINTK("phy%d part of wide port with "
1802 "phy%d\n", phy_id, i);
1803 goto out;
1804 }
1805 }
1806 res = sas_rediscover_dev(dev, phy_id);
1807 } else
1808 res = sas_discover_new(dev, phy_id);
1809 out:
1810 return res;
1811 }
1812
1813 /**
1814 * sas_revalidate_domain -- revalidate the domain
1815 * @port: port to the domain of interest
1816 *
1817 * NOTE: this process _must_ quit (return) as soon as any connection
1818 * errors are encountered. Connection recovery is done elsewhere.
1819 * Discover process only interrogates devices in order to discover the
1820 * domain.
1821 */
1822 int sas_ex_revalidate_domain(struct domain_device *port_dev)
1823 {
1824 int res;
1825 struct domain_device *dev = NULL;
1826
1827 res = sas_find_bcast_dev(port_dev, &dev);
1828 if (res)
1829 goto out;
1830 if (dev) {
1831 struct expander_device *ex = &dev->ex_dev;
1832 int i = 0, phy_id;
1833
1834 do {
1835 phy_id = -1;
1836 res = sas_find_bcast_phy(dev, &phy_id, i);
1837 if (phy_id == -1)
1838 break;
1839 res = sas_rediscover(dev, phy_id);
1840 i = phy_id + 1;
1841 } while (i < ex->num_phys);
1842 }
1843 out:
1844 return res;
1845 }
1846
1847 #if 0
1848 /* ---------- SMP portal ---------- */
1849
1850 static ssize_t smp_portal_write(struct kobject *kobj, char *buf, loff_t offs,
1851 size_t size)
1852 {
1853 struct domain_device *dev = to_dom_device(kobj);
1854 struct expander_device *ex = &dev->ex_dev;
1855
1856 if (offs != 0)
1857 return -EFBIG;
1858 else if (size == 0)
1859 return 0;
1860
1861 down_interruptible(&ex->smp_sema);
1862 if (ex->smp_req)
1863 kfree(ex->smp_req);
1864 ex->smp_req = kzalloc(size, GFP_USER);
1865 if (!ex->smp_req) {
1866 up(&ex->smp_sema);
1867 return -ENOMEM;
1868 }
1869 memcpy(ex->smp_req, buf, size);
1870 ex->smp_req_size = size;
1871 ex->smp_portal_pid = current->pid;
1872 up(&ex->smp_sema);
1873
1874 return size;
1875 }
1876
1877 static ssize_t smp_portal_read(struct kobject *kobj, char *buf, loff_t offs,
1878 size_t size)
1879 {
1880 struct domain_device *dev = to_dom_device(kobj);
1881 struct expander_device *ex = &dev->ex_dev;
1882 u8 *smp_resp;
1883 int res = -EINVAL;
1884
1885 /* XXX: sysfs gives us an offset of 0x10 or 0x8 while in fact
1886 * it should be 0.
1887 */
1888
1889 down_interruptible(&ex->smp_sema);
1890 if (!ex->smp_req || ex->smp_portal_pid != current->pid)
1891 goto out;
1892
1893 res = 0;
1894 if (size == 0)
1895 goto out;
1896
1897 res = -ENOMEM;
1898 smp_resp = alloc_smp_resp(size);
1899 if (!smp_resp)
1900 goto out;
1901 res = smp_execute_task(dev, ex->smp_req, ex->smp_req_size,
1902 smp_resp, size);
1903 if (!res) {
1904 memcpy(buf, smp_resp, size);
1905 res = size;
1906 }
1907
1908 kfree(smp_resp);
1909 out:
1910 kfree(ex->smp_req);
1911 ex->smp_req = NULL;
1912 ex->smp_req_size = 0;
1913 ex->smp_portal_pid = -1;
1914 up(&ex->smp_sema);
1915 return res;
1916 }
1917 #endif
Support for the Chinese Samsung S3C2440 based development boards