1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Serial Attached SCSI (SAS) Expander discovery and configuration |
4 | * |
5 | * Copyright (C) 2005 Adaptec, Inc. All rights reserved. |
6 | * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> |
7 | * |
8 | * This file is licensed under GPLv2. |
9 | */ |
10 | |
11 | #include <linux/scatterlist.h> |
12 | #include <linux/blkdev.h> |
13 | #include <linux/slab.h> |
14 | #include <asm/unaligned.h> |
15 | |
16 | #include "sas_internal.h" |
17 | |
18 | #include <scsi/sas_ata.h> |
19 | #include <scsi/scsi_transport.h> |
20 | #include <scsi/scsi_transport_sas.h> |
21 | #include "scsi_sas_internal.h" |
22 | |
23 | static int sas_discover_expander(struct domain_device *dev); |
24 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr); |
25 | static int sas_configure_phy(struct domain_device *dev, int phy_id, |
26 | u8 *sas_addr, int include); |
27 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr); |
28 | |
29 | /* ---------- SMP task management ---------- */ |
30 | |
31 | /* Give it some long enough timeout. In seconds. */ |
32 | #define SMP_TIMEOUT 10 |
33 | |
34 | static int smp_execute_task_sg(struct domain_device *dev, |
35 | struct scatterlist *req, struct scatterlist *resp) |
36 | { |
37 | int res, retry; |
38 | struct sas_task *task = NULL; |
39 | struct sas_internal *i = |
40 | to_sas_internal(dev->port->ha->shost->transportt); |
41 | struct sas_ha_struct *ha = dev->port->ha; |
42 | |
43 | pm_runtime_get_sync(dev: ha->dev); |
44 | mutex_lock(&dev->ex_dev.cmd_mutex); |
45 | for (retry = 0; retry < 3; retry++) { |
46 | if (test_bit(SAS_DEV_GONE, &dev->state)) { |
47 | res = -ECOMM; |
48 | break; |
49 | } |
50 | |
51 | task = sas_alloc_slow_task(GFP_KERNEL); |
52 | if (!task) { |
53 | res = -ENOMEM; |
54 | break; |
55 | } |
56 | task->dev = dev; |
57 | task->task_proto = dev->tproto; |
58 | task->smp_task.smp_req = *req; |
59 | task->smp_task.smp_resp = *resp; |
60 | |
61 | task->task_done = sas_task_internal_done; |
62 | |
63 | task->slow_task->timer.function = sas_task_internal_timedout; |
64 | task->slow_task->timer.expires = jiffies + SMP_TIMEOUT*HZ; |
65 | add_timer(timer: &task->slow_task->timer); |
66 | |
67 | res = i->dft->lldd_execute_task(task, GFP_KERNEL); |
68 | |
69 | if (res) { |
70 | del_timer_sync(timer: &task->slow_task->timer); |
71 | pr_notice("executing SMP task failed:%d\n" , res); |
72 | break; |
73 | } |
74 | |
75 | wait_for_completion(&task->slow_task->completion); |
76 | res = -ECOMM; |
77 | if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { |
78 | pr_notice("smp task timed out or aborted\n" ); |
79 | i->dft->lldd_abort_task(task); |
80 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { |
81 | pr_notice("SMP task aborted and not done\n" ); |
82 | break; |
83 | } |
84 | } |
85 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
86 | task->task_status.stat == SAS_SAM_STAT_GOOD) { |
87 | res = 0; |
88 | break; |
89 | } |
90 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
91 | task->task_status.stat == SAS_DATA_UNDERRUN) { |
92 | /* no error, but return the number of bytes of |
93 | * underrun */ |
94 | res = task->task_status.residual; |
95 | break; |
96 | } |
97 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
98 | task->task_status.stat == SAS_DATA_OVERRUN) { |
99 | res = -EMSGSIZE; |
100 | break; |
101 | } |
102 | if (task->task_status.resp == SAS_TASK_UNDELIVERED && |
103 | task->task_status.stat == SAS_DEVICE_UNKNOWN) |
104 | break; |
105 | else { |
106 | pr_notice("%s: task to dev %016llx response: 0x%x status 0x%x\n" , |
107 | __func__, |
108 | SAS_ADDR(dev->sas_addr), |
109 | task->task_status.resp, |
110 | task->task_status.stat); |
111 | sas_free_task(task); |
112 | task = NULL; |
113 | } |
114 | } |
115 | mutex_unlock(lock: &dev->ex_dev.cmd_mutex); |
116 | pm_runtime_put_sync(dev: ha->dev); |
117 | |
118 | BUG_ON(retry == 3 && task != NULL); |
119 | sas_free_task(task); |
120 | return res; |
121 | } |
122 | |
123 | static int smp_execute_task(struct domain_device *dev, void *req, int req_size, |
124 | void *resp, int resp_size) |
125 | { |
126 | struct scatterlist req_sg; |
127 | struct scatterlist resp_sg; |
128 | |
129 | sg_init_one(&req_sg, req, req_size); |
130 | sg_init_one(&resp_sg, resp, resp_size); |
131 | return smp_execute_task_sg(dev, req: &req_sg, resp: &resp_sg); |
132 | } |
133 | |
134 | /* ---------- Allocations ---------- */ |
135 | |
136 | static inline void *alloc_smp_req(int size) |
137 | { |
138 | u8 *p = kzalloc(size, GFP_KERNEL); |
139 | if (p) |
140 | p[0] = SMP_REQUEST; |
141 | return p; |
142 | } |
143 | |
144 | static inline void *alloc_smp_resp(int size) |
145 | { |
146 | return kzalloc(size, GFP_KERNEL); |
147 | } |
148 | |
149 | static char sas_route_char(struct domain_device *dev, struct ex_phy *phy) |
150 | { |
151 | switch (phy->routing_attr) { |
152 | case TABLE_ROUTING: |
153 | if (dev->ex_dev.t2t_supp) |
154 | return 'U'; |
155 | else |
156 | return 'T'; |
157 | case DIRECT_ROUTING: |
158 | return 'D'; |
159 | case SUBTRACTIVE_ROUTING: |
160 | return 'S'; |
161 | default: |
162 | return '?'; |
163 | } |
164 | } |
165 | |
166 | static enum sas_device_type to_dev_type(struct discover_resp *dr) |
167 | { |
168 | /* This is detecting a failure to transmit initial dev to host |
169 | * FIS as described in section J.5 of sas-2 r16 |
170 | */ |
171 | if (dr->attached_dev_type == SAS_PHY_UNUSED && dr->attached_sata_dev && |
172 | dr->linkrate >= SAS_LINK_RATE_1_5_GBPS) |
173 | return SAS_SATA_PENDING; |
174 | else |
175 | return dr->attached_dev_type; |
176 | } |
177 | |
178 | static void sas_set_ex_phy(struct domain_device *dev, int phy_id, |
179 | struct smp_disc_resp *disc_resp) |
180 | { |
181 | enum sas_device_type dev_type; |
182 | enum sas_linkrate linkrate; |
183 | u8 sas_addr[SAS_ADDR_SIZE]; |
184 | struct discover_resp *dr = &disc_resp->disc; |
185 | struct sas_ha_struct *ha = dev->port->ha; |
186 | struct expander_device *ex = &dev->ex_dev; |
187 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
188 | struct sas_rphy *rphy = dev->rphy; |
189 | bool new_phy = !phy->phy; |
190 | char *type; |
191 | |
192 | if (new_phy) { |
193 | if (WARN_ON_ONCE(test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state))) |
194 | return; |
195 | phy->phy = sas_phy_alloc(&rphy->dev, phy_id); |
196 | |
197 | /* FIXME: error_handling */ |
198 | BUG_ON(!phy->phy); |
199 | } |
200 | |
201 | switch (disc_resp->result) { |
202 | case SMP_RESP_PHY_VACANT: |
203 | phy->phy_state = PHY_VACANT; |
204 | break; |
205 | default: |
206 | phy->phy_state = PHY_NOT_PRESENT; |
207 | break; |
208 | case SMP_RESP_FUNC_ACC: |
209 | phy->phy_state = PHY_EMPTY; /* do not know yet */ |
210 | break; |
211 | } |
212 | |
213 | /* check if anything important changed to squelch debug */ |
214 | dev_type = phy->attached_dev_type; |
215 | linkrate = phy->linkrate; |
216 | memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); |
217 | |
218 | /* Handle vacant phy - rest of dr data is not valid so skip it */ |
219 | if (phy->phy_state == PHY_VACANT) { |
220 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |
221 | phy->attached_dev_type = SAS_PHY_UNUSED; |
222 | if (!test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) { |
223 | phy->phy_id = phy_id; |
224 | goto skip; |
225 | } else |
226 | goto out; |
227 | } |
228 | |
229 | phy->attached_dev_type = to_dev_type(dr); |
230 | if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) |
231 | goto out; |
232 | phy->phy_id = phy_id; |
233 | phy->linkrate = dr->linkrate; |
234 | phy->attached_sata_host = dr->attached_sata_host; |
235 | phy->attached_sata_dev = dr->attached_sata_dev; |
236 | phy->attached_sata_ps = dr->attached_sata_ps; |
237 | phy->attached_iproto = dr->iproto << 1; |
238 | phy->attached_tproto = dr->tproto << 1; |
239 | /* help some expanders that fail to zero sas_address in the 'no |
240 | * device' case |
241 | */ |
242 | if (phy->attached_dev_type == SAS_PHY_UNUSED || |
243 | phy->linkrate < SAS_LINK_RATE_1_5_GBPS) |
244 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |
245 | else |
246 | memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE); |
247 | phy->attached_phy_id = dr->attached_phy_id; |
248 | phy->phy_change_count = dr->change_count; |
249 | phy->routing_attr = dr->routing_attr; |
250 | phy->virtual = dr->virtual; |
251 | phy->last_da_index = -1; |
252 | |
253 | phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr); |
254 | phy->phy->identify.device_type = dr->attached_dev_type; |
255 | phy->phy->identify.initiator_port_protocols = phy->attached_iproto; |
256 | phy->phy->identify.target_port_protocols = phy->attached_tproto; |
257 | if (!phy->attached_tproto && dr->attached_sata_dev) |
258 | phy->phy->identify.target_port_protocols = SAS_PROTOCOL_SATA; |
259 | phy->phy->identify.phy_identifier = phy_id; |
260 | phy->phy->minimum_linkrate_hw = dr->hmin_linkrate; |
261 | phy->phy->maximum_linkrate_hw = dr->hmax_linkrate; |
262 | phy->phy->minimum_linkrate = dr->pmin_linkrate; |
263 | phy->phy->maximum_linkrate = dr->pmax_linkrate; |
264 | phy->phy->negotiated_linkrate = phy->linkrate; |
265 | phy->phy->enabled = (phy->linkrate != SAS_PHY_DISABLED); |
266 | |
267 | skip: |
268 | if (new_phy) |
269 | if (sas_phy_add(phy->phy)) { |
270 | sas_phy_free(phy->phy); |
271 | return; |
272 | } |
273 | |
274 | out: |
275 | switch (phy->attached_dev_type) { |
276 | case SAS_SATA_PENDING: |
277 | type = "stp pending" ; |
278 | break; |
279 | case SAS_PHY_UNUSED: |
280 | type = "no device" ; |
281 | break; |
282 | case SAS_END_DEVICE: |
283 | if (phy->attached_iproto) { |
284 | if (phy->attached_tproto) |
285 | type = "host+target" ; |
286 | else |
287 | type = "host" ; |
288 | } else { |
289 | if (dr->attached_sata_dev) |
290 | type = "stp" ; |
291 | else |
292 | type = "ssp" ; |
293 | } |
294 | break; |
295 | case SAS_EDGE_EXPANDER_DEVICE: |
296 | case SAS_FANOUT_EXPANDER_DEVICE: |
297 | type = "smp" ; |
298 | break; |
299 | default: |
300 | type = "unknown" ; |
301 | } |
302 | |
303 | /* this routine is polled by libata error recovery so filter |
304 | * unimportant messages |
305 | */ |
306 | if (new_phy || phy->attached_dev_type != dev_type || |
307 | phy->linkrate != linkrate || |
308 | SAS_ADDR(phy->attached_sas_addr) != SAS_ADDR(sas_addr)) |
309 | /* pass */; |
310 | else |
311 | return; |
312 | |
313 | /* if the attached device type changed and ata_eh is active, |
314 | * make sure we run revalidation when eh completes (see: |
315 | * sas_enable_revalidation) |
316 | */ |
317 | if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) |
318 | set_bit(nr: DISCE_REVALIDATE_DOMAIN, addr: &dev->port->disc.pending); |
319 | |
320 | pr_debug("%sex %016llx phy%02d:%c:%X attached: %016llx (%s)\n" , |
321 | test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state) ? "ata: " : "" , |
322 | SAS_ADDR(dev->sas_addr), phy->phy_id, |
323 | sas_route_char(dev, phy), phy->linkrate, |
324 | SAS_ADDR(phy->attached_sas_addr), type); |
325 | } |
326 | |
327 | /* check if we have an existing attached ata device on this expander phy */ |
328 | struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id) |
329 | { |
330 | struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id]; |
331 | struct domain_device *dev; |
332 | struct sas_rphy *rphy; |
333 | |
334 | if (!ex_phy->port) |
335 | return NULL; |
336 | |
337 | rphy = ex_phy->port->rphy; |
338 | if (!rphy) |
339 | return NULL; |
340 | |
341 | dev = sas_find_dev_by_rphy(rphy); |
342 | |
343 | if (dev && dev_is_sata(dev)) |
344 | return dev; |
345 | |
346 | return NULL; |
347 | } |
348 | |
349 | #define DISCOVER_REQ_SIZE 16 |
350 | #define DISCOVER_RESP_SIZE sizeof(struct smp_disc_resp) |
351 | |
352 | static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req, |
353 | struct smp_disc_resp *disc_resp, |
354 | int single) |
355 | { |
356 | struct discover_resp *dr = &disc_resp->disc; |
357 | int res; |
358 | |
359 | disc_req[9] = single; |
360 | |
361 | res = smp_execute_task(dev, req: disc_req, DISCOVER_REQ_SIZE, |
362 | resp: disc_resp, DISCOVER_RESP_SIZE); |
363 | if (res) |
364 | return res; |
365 | if (memcmp(p: dev->sas_addr, q: dr->attached_sas_addr, SAS_ADDR_SIZE) == 0) { |
366 | pr_notice("Found loopback topology, just ignore it!\n" ); |
367 | return 0; |
368 | } |
369 | sas_set_ex_phy(dev, phy_id: single, disc_resp); |
370 | return 0; |
371 | } |
372 | |
373 | int sas_ex_phy_discover(struct domain_device *dev, int single) |
374 | { |
375 | struct expander_device *ex = &dev->ex_dev; |
376 | int res = 0; |
377 | u8 *disc_req; |
378 | struct smp_disc_resp *disc_resp; |
379 | |
380 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); |
381 | if (!disc_req) |
382 | return -ENOMEM; |
383 | |
384 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); |
385 | if (!disc_resp) { |
386 | kfree(objp: disc_req); |
387 | return -ENOMEM; |
388 | } |
389 | |
390 | disc_req[1] = SMP_DISCOVER; |
391 | |
392 | if (0 <= single && single < ex->num_phys) { |
393 | res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single); |
394 | } else { |
395 | int i; |
396 | |
397 | for (i = 0; i < ex->num_phys; i++) { |
398 | res = sas_ex_phy_discover_helper(dev, disc_req, |
399 | disc_resp, single: i); |
400 | if (res) |
401 | goto out_err; |
402 | } |
403 | } |
404 | out_err: |
405 | kfree(objp: disc_resp); |
406 | kfree(objp: disc_req); |
407 | return res; |
408 | } |
409 | |
410 | static int sas_expander_discover(struct domain_device *dev) |
411 | { |
412 | struct expander_device *ex = &dev->ex_dev; |
413 | int res; |
414 | |
415 | ex->ex_phy = kcalloc(n: ex->num_phys, size: sizeof(*ex->ex_phy), GFP_KERNEL); |
416 | if (!ex->ex_phy) |
417 | return -ENOMEM; |
418 | |
419 | res = sas_ex_phy_discover(dev, single: -1); |
420 | if (res) |
421 | goto out_err; |
422 | |
423 | return 0; |
424 | out_err: |
425 | kfree(objp: ex->ex_phy); |
426 | ex->ex_phy = NULL; |
427 | return res; |
428 | } |
429 | |
430 | #define MAX_EXPANDER_PHYS 128 |
431 | |
432 | #define RG_REQ_SIZE 8 |
433 | #define RG_RESP_SIZE sizeof(struct smp_rg_resp) |
434 | |
435 | static int sas_ex_general(struct domain_device *dev) |
436 | { |
437 | u8 *rg_req; |
438 | struct smp_rg_resp *rg_resp; |
439 | struct report_general_resp *rg; |
440 | int res; |
441 | int i; |
442 | |
443 | rg_req = alloc_smp_req(RG_REQ_SIZE); |
444 | if (!rg_req) |
445 | return -ENOMEM; |
446 | |
447 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); |
448 | if (!rg_resp) { |
449 | kfree(objp: rg_req); |
450 | return -ENOMEM; |
451 | } |
452 | |
453 | rg_req[1] = SMP_REPORT_GENERAL; |
454 | |
455 | for (i = 0; i < 5; i++) { |
456 | res = smp_execute_task(dev, req: rg_req, RG_REQ_SIZE, resp: rg_resp, |
457 | RG_RESP_SIZE); |
458 | |
459 | if (res) { |
460 | pr_notice("RG to ex %016llx failed:0x%x\n" , |
461 | SAS_ADDR(dev->sas_addr), res); |
462 | goto out; |
463 | } else if (rg_resp->result != SMP_RESP_FUNC_ACC) { |
464 | pr_debug("RG:ex %016llx returned SMP result:0x%x\n" , |
465 | SAS_ADDR(dev->sas_addr), rg_resp->result); |
466 | res = rg_resp->result; |
467 | goto out; |
468 | } |
469 | |
470 | rg = &rg_resp->rg; |
471 | dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count); |
472 | dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes); |
473 | dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS); |
474 | dev->ex_dev.t2t_supp = rg->t2t_supp; |
475 | dev->ex_dev.conf_route_table = rg->conf_route_table; |
476 | dev->ex_dev.configuring = rg->configuring; |
477 | memcpy(dev->ex_dev.enclosure_logical_id, |
478 | rg->enclosure_logical_id, 8); |
479 | |
480 | if (dev->ex_dev.configuring) { |
481 | pr_debug("RG: ex %016llx self-configuring...\n" , |
482 | SAS_ADDR(dev->sas_addr)); |
483 | schedule_timeout_interruptible(timeout: 5*HZ); |
484 | } else |
485 | break; |
486 | } |
487 | out: |
488 | kfree(objp: rg_req); |
489 | kfree(objp: rg_resp); |
490 | return res; |
491 | } |
492 | |
493 | static void ex_assign_manuf_info(struct domain_device *dev, void |
494 | *_mi_resp) |
495 | { |
496 | u8 *mi_resp = _mi_resp; |
497 | struct sas_rphy *rphy = dev->rphy; |
498 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); |
499 | |
500 | memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN); |
501 | memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN); |
502 | memcpy(edev->product_rev, mi_resp + 36, |
503 | SAS_EXPANDER_PRODUCT_REV_LEN); |
504 | |
505 | if (mi_resp[8] & 1) { |
506 | memcpy(edev->component_vendor_id, mi_resp + 40, |
507 | SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN); |
508 | edev->component_id = mi_resp[48] << 8 | mi_resp[49]; |
509 | edev->component_revision_id = mi_resp[50]; |
510 | } |
511 | } |
512 | |
513 | #define MI_REQ_SIZE 8 |
514 | #define MI_RESP_SIZE 64 |
515 | |
516 | static int sas_ex_manuf_info(struct domain_device *dev) |
517 | { |
518 | u8 *mi_req; |
519 | u8 *mi_resp; |
520 | int res; |
521 | |
522 | mi_req = alloc_smp_req(MI_REQ_SIZE); |
523 | if (!mi_req) |
524 | return -ENOMEM; |
525 | |
526 | mi_resp = alloc_smp_resp(MI_RESP_SIZE); |
527 | if (!mi_resp) { |
528 | kfree(objp: mi_req); |
529 | return -ENOMEM; |
530 | } |
531 | |
532 | mi_req[1] = SMP_REPORT_MANUF_INFO; |
533 | |
534 | res = smp_execute_task(dev, req: mi_req, MI_REQ_SIZE, resp: mi_resp, MI_RESP_SIZE); |
535 | if (res) { |
536 | pr_notice("MI: ex %016llx failed:0x%x\n" , |
537 | SAS_ADDR(dev->sas_addr), res); |
538 | goto out; |
539 | } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) { |
540 | pr_debug("MI ex %016llx returned SMP result:0x%x\n" , |
541 | SAS_ADDR(dev->sas_addr), mi_resp[2]); |
542 | goto out; |
543 | } |
544 | |
545 | ex_assign_manuf_info(dev, mi_resp: mi_resp); |
546 | out: |
547 | kfree(objp: mi_req); |
548 | kfree(objp: mi_resp); |
549 | return res; |
550 | } |
551 | |
552 | #define PC_REQ_SIZE 44 |
553 | #define PC_RESP_SIZE 8 |
554 | |
555 | int sas_smp_phy_control(struct domain_device *dev, int phy_id, |
556 | enum phy_func phy_func, |
557 | struct sas_phy_linkrates *rates) |
558 | { |
559 | u8 *pc_req; |
560 | u8 *pc_resp; |
561 | int res; |
562 | |
563 | pc_req = alloc_smp_req(PC_REQ_SIZE); |
564 | if (!pc_req) |
565 | return -ENOMEM; |
566 | |
567 | pc_resp = alloc_smp_resp(PC_RESP_SIZE); |
568 | if (!pc_resp) { |
569 | kfree(objp: pc_req); |
570 | return -ENOMEM; |
571 | } |
572 | |
573 | pc_req[1] = SMP_PHY_CONTROL; |
574 | pc_req[9] = phy_id; |
575 | pc_req[10] = phy_func; |
576 | if (rates) { |
577 | pc_req[32] = rates->minimum_linkrate << 4; |
578 | pc_req[33] = rates->maximum_linkrate << 4; |
579 | } |
580 | |
581 | res = smp_execute_task(dev, req: pc_req, PC_REQ_SIZE, resp: pc_resp, PC_RESP_SIZE); |
582 | if (res) { |
583 | pr_err("ex %016llx phy%02d PHY control failed: %d\n" , |
584 | SAS_ADDR(dev->sas_addr), phy_id, res); |
585 | } else if (pc_resp[2] != SMP_RESP_FUNC_ACC) { |
586 | pr_err("ex %016llx phy%02d PHY control failed: function result 0x%x\n" , |
587 | SAS_ADDR(dev->sas_addr), phy_id, pc_resp[2]); |
588 | res = pc_resp[2]; |
589 | } |
590 | kfree(objp: pc_resp); |
591 | kfree(objp: pc_req); |
592 | return res; |
593 | } |
594 | |
595 | static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) |
596 | { |
597 | struct expander_device *ex = &dev->ex_dev; |
598 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
599 | |
600 | sas_smp_phy_control(dev, phy_id, phy_func: PHY_FUNC_DISABLE, NULL); |
601 | phy->linkrate = SAS_PHY_DISABLED; |
602 | } |
603 | |
604 | static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr) |
605 | { |
606 | struct expander_device *ex = &dev->ex_dev; |
607 | int i; |
608 | |
609 | for (i = 0; i < ex->num_phys; i++) { |
610 | struct ex_phy *phy = &ex->ex_phy[i]; |
611 | |
612 | if (phy->phy_state == PHY_VACANT || |
613 | phy->phy_state == PHY_NOT_PRESENT) |
614 | continue; |
615 | |
616 | if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr)) |
617 | sas_ex_disable_phy(dev, phy_id: i); |
618 | } |
619 | } |
620 | |
621 | static int sas_dev_present_in_domain(struct asd_sas_port *port, |
622 | u8 *sas_addr) |
623 | { |
624 | struct domain_device *dev; |
625 | |
626 | if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr)) |
627 | return 1; |
628 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { |
629 | if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr)) |
630 | return 1; |
631 | } |
632 | return 0; |
633 | } |
634 | |
635 | #define RPEL_REQ_SIZE 16 |
636 | #define RPEL_RESP_SIZE 32 |
637 | int sas_smp_get_phy_events(struct sas_phy *phy) |
638 | { |
639 | int res; |
640 | u8 *req; |
641 | u8 *resp; |
642 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); |
643 | struct domain_device *dev = sas_find_dev_by_rphy(rphy); |
644 | |
645 | req = alloc_smp_req(RPEL_REQ_SIZE); |
646 | if (!req) |
647 | return -ENOMEM; |
648 | |
649 | resp = alloc_smp_resp(RPEL_RESP_SIZE); |
650 | if (!resp) { |
651 | kfree(objp: req); |
652 | return -ENOMEM; |
653 | } |
654 | |
655 | req[1] = SMP_REPORT_PHY_ERR_LOG; |
656 | req[9] = phy->number; |
657 | |
658 | res = smp_execute_task(dev, req, RPEL_REQ_SIZE, |
659 | resp, RPEL_RESP_SIZE); |
660 | |
661 | if (res) |
662 | goto out; |
663 | |
664 | phy->invalid_dword_count = get_unaligned_be32(p: &resp[12]); |
665 | phy->running_disparity_error_count = get_unaligned_be32(p: &resp[16]); |
666 | phy->loss_of_dword_sync_count = get_unaligned_be32(p: &resp[20]); |
667 | phy->phy_reset_problem_count = get_unaligned_be32(p: &resp[24]); |
668 | |
669 | out: |
670 | kfree(objp: req); |
671 | kfree(objp: resp); |
672 | return res; |
673 | |
674 | } |
675 | |
676 | #ifdef CONFIG_SCSI_SAS_ATA |
677 | |
678 | #define RPS_REQ_SIZE 16 |
679 | #define RPS_RESP_SIZE sizeof(struct smp_rps_resp) |
680 | |
681 | int sas_get_report_phy_sata(struct domain_device *dev, int phy_id, |
682 | struct smp_rps_resp *rps_resp) |
683 | { |
684 | int res; |
685 | u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE); |
686 | u8 *resp = (u8 *)rps_resp; |
687 | |
688 | if (!rps_req) |
689 | return -ENOMEM; |
690 | |
691 | rps_req[1] = SMP_REPORT_PHY_SATA; |
692 | rps_req[9] = phy_id; |
693 | |
694 | res = smp_execute_task(dev, req: rps_req, RPS_REQ_SIZE, |
695 | resp: rps_resp, RPS_RESP_SIZE); |
696 | |
697 | /* 0x34 is the FIS type for the D2H fis. There's a potential |
698 | * standards cockup here. sas-2 explicitly specifies the FIS |
699 | * should be encoded so that FIS type is in resp[24]. |
700 | * However, some expanders endian reverse this. Undo the |
701 | * reversal here */ |
702 | if (!res && resp[27] == 0x34 && resp[24] != 0x34) { |
703 | int i; |
704 | |
705 | for (i = 0; i < 5; i++) { |
706 | int j = 24 + (i*4); |
707 | u8 a, b; |
708 | a = resp[j + 0]; |
709 | b = resp[j + 1]; |
710 | resp[j + 0] = resp[j + 3]; |
711 | resp[j + 1] = resp[j + 2]; |
712 | resp[j + 2] = b; |
713 | resp[j + 3] = a; |
714 | } |
715 | } |
716 | |
717 | kfree(objp: rps_req); |
718 | return res; |
719 | } |
720 | #endif |
721 | |
722 | static void sas_ex_get_linkrate(struct domain_device *parent, |
723 | struct domain_device *child, |
724 | struct ex_phy *parent_phy) |
725 | { |
726 | struct expander_device *parent_ex = &parent->ex_dev; |
727 | struct sas_port *port; |
728 | int i; |
729 | |
730 | child->pathways = 0; |
731 | |
732 | port = parent_phy->port; |
733 | |
734 | for (i = 0; i < parent_ex->num_phys; i++) { |
735 | struct ex_phy *phy = &parent_ex->ex_phy[i]; |
736 | |
737 | if (phy->phy_state == PHY_VACANT || |
738 | phy->phy_state == PHY_NOT_PRESENT) |
739 | continue; |
740 | |
741 | if (sas_phy_match_dev_addr(dev: child, phy)) { |
742 | child->min_linkrate = min(parent->min_linkrate, |
743 | phy->linkrate); |
744 | child->max_linkrate = max(parent->max_linkrate, |
745 | phy->linkrate); |
746 | child->pathways++; |
747 | sas_port_add_phy(port, phy->phy); |
748 | } |
749 | } |
750 | child->linkrate = min(parent_phy->linkrate, child->max_linkrate); |
751 | child->pathways = min(child->pathways, parent->pathways); |
752 | } |
753 | |
754 | static int sas_ex_add_dev(struct domain_device *parent, struct ex_phy *phy, |
755 | struct domain_device *child, int phy_id) |
756 | { |
757 | struct sas_rphy *rphy; |
758 | int res; |
759 | |
760 | child->dev_type = SAS_END_DEVICE; |
761 | rphy = sas_end_device_alloc(phy->port); |
762 | if (!rphy) |
763 | return -ENOMEM; |
764 | |
765 | child->tproto = phy->attached_tproto; |
766 | sas_init_dev(dev: child); |
767 | |
768 | child->rphy = rphy; |
769 | get_device(dev: &rphy->dev); |
770 | rphy->identify.phy_identifier = phy_id; |
771 | sas_fill_in_rphy(dev: child, rphy); |
772 | |
773 | list_add_tail(new: &child->disco_list_node, head: &parent->port->disco_list); |
774 | |
775 | res = sas_notify_lldd_dev_found(child); |
776 | if (res) { |
777 | pr_notice("notify lldd for device %016llx at %016llx:%02d returned 0x%x\n" , |
778 | SAS_ADDR(child->sas_addr), |
779 | SAS_ADDR(parent->sas_addr), phy_id, res); |
780 | sas_rphy_free(child->rphy); |
781 | list_del(entry: &child->disco_list_node); |
782 | return res; |
783 | } |
784 | |
785 | return 0; |
786 | } |
787 | |
788 | static struct domain_device *sas_ex_discover_end_dev( |
789 | struct domain_device *parent, int phy_id) |
790 | { |
791 | struct expander_device *parent_ex = &parent->ex_dev; |
792 | struct ex_phy *phy = &parent_ex->ex_phy[phy_id]; |
793 | struct domain_device *child = NULL; |
794 | int res; |
795 | |
796 | if (phy->attached_sata_host || phy->attached_sata_ps) |
797 | return NULL; |
798 | |
799 | child = sas_alloc_device(); |
800 | if (!child) |
801 | return NULL; |
802 | |
803 | kref_get(kref: &parent->kref); |
804 | child->parent = parent; |
805 | child->port = parent->port; |
806 | child->iproto = phy->attached_iproto; |
807 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); |
808 | sas_hash_addr(hashed: child->hashed_sas_addr, sas_addr: child->sas_addr); |
809 | if (!phy->port) { |
810 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); |
811 | if (unlikely(!phy->port)) |
812 | goto out_err; |
813 | if (unlikely(sas_port_add(phy->port) != 0)) { |
814 | sas_port_free(phy->port); |
815 | goto out_err; |
816 | } |
817 | } |
818 | sas_ex_get_linkrate(parent, child, parent_phy: phy); |
819 | sas_device_set_phy(dev: child, port: phy->port); |
820 | |
821 | if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) { |
822 | res = sas_ata_add_dev(parent, phy, child, phy_id); |
823 | } else if (phy->attached_tproto & SAS_PROTOCOL_SSP) { |
824 | res = sas_ex_add_dev(parent, phy, child, phy_id); |
825 | } else { |
826 | pr_notice("target proto 0x%x at %016llx:0x%x not handled\n" , |
827 | phy->attached_tproto, SAS_ADDR(parent->sas_addr), |
828 | phy_id); |
829 | res = -ENODEV; |
830 | } |
831 | |
832 | if (res) |
833 | goto out_free; |
834 | |
835 | list_add_tail(new: &child->siblings, head: &parent_ex->children); |
836 | return child; |
837 | |
838 | out_free: |
839 | sas_port_delete(phy->port); |
840 | out_err: |
841 | phy->port = NULL; |
842 | sas_put_device(dev: child); |
843 | return NULL; |
844 | } |
845 | |
846 | /* See if this phy is part of a wide port */ |
847 | static bool sas_ex_join_wide_port(struct domain_device *parent, int phy_id) |
848 | { |
849 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; |
850 | int i; |
851 | |
852 | for (i = 0; i < parent->ex_dev.num_phys; i++) { |
853 | struct ex_phy *ephy = &parent->ex_dev.ex_phy[i]; |
854 | |
855 | if (ephy == phy) |
856 | continue; |
857 | |
858 | if (!memcmp(p: phy->attached_sas_addr, q: ephy->attached_sas_addr, |
859 | SAS_ADDR_SIZE) && ephy->port) { |
860 | sas_port_add_phy(ephy->port, phy->phy); |
861 | phy->port = ephy->port; |
862 | phy->phy_state = PHY_DEVICE_DISCOVERED; |
863 | return true; |
864 | } |
865 | } |
866 | |
867 | return false; |
868 | } |
869 | |
870 | static struct domain_device *sas_ex_discover_expander( |
871 | struct domain_device *parent, int phy_id) |
872 | { |
873 | struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy); |
874 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; |
875 | struct domain_device *child = NULL; |
876 | struct sas_rphy *rphy; |
877 | struct sas_expander_device *edev; |
878 | struct asd_sas_port *port; |
879 | int res; |
880 | |
881 | if (phy->routing_attr == DIRECT_ROUTING) { |
882 | pr_warn("ex %016llx:%02d:D <--> ex %016llx:0x%x is not allowed\n" , |
883 | SAS_ADDR(parent->sas_addr), phy_id, |
884 | SAS_ADDR(phy->attached_sas_addr), |
885 | phy->attached_phy_id); |
886 | return NULL; |
887 | } |
888 | child = sas_alloc_device(); |
889 | if (!child) |
890 | return NULL; |
891 | |
892 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); |
893 | /* FIXME: better error handling */ |
894 | BUG_ON(sas_port_add(phy->port) != 0); |
895 | |
896 | |
897 | switch (phy->attached_dev_type) { |
898 | case SAS_EDGE_EXPANDER_DEVICE: |
899 | rphy = sas_expander_alloc(phy->port, |
900 | SAS_EDGE_EXPANDER_DEVICE); |
901 | break; |
902 | case SAS_FANOUT_EXPANDER_DEVICE: |
903 | rphy = sas_expander_alloc(phy->port, |
904 | SAS_FANOUT_EXPANDER_DEVICE); |
905 | break; |
906 | default: |
907 | rphy = NULL; /* shut gcc up */ |
908 | BUG(); |
909 | } |
910 | port = parent->port; |
911 | child->rphy = rphy; |
912 | get_device(dev: &rphy->dev); |
913 | edev = rphy_to_expander_device(rphy); |
914 | child->dev_type = phy->attached_dev_type; |
915 | kref_get(kref: &parent->kref); |
916 | child->parent = parent; |
917 | child->port = port; |
918 | child->iproto = phy->attached_iproto; |
919 | child->tproto = phy->attached_tproto; |
920 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); |
921 | sas_hash_addr(hashed: child->hashed_sas_addr, sas_addr: child->sas_addr); |
922 | sas_ex_get_linkrate(parent, child, parent_phy: phy); |
923 | edev->level = parent_ex->level + 1; |
924 | parent->port->disc.max_level = max(parent->port->disc.max_level, |
925 | edev->level); |
926 | sas_init_dev(dev: child); |
927 | sas_fill_in_rphy(dev: child, rphy); |
928 | sas_rphy_add(rphy); |
929 | |
930 | spin_lock_irq(lock: &parent->port->dev_list_lock); |
931 | list_add_tail(new: &child->dev_list_node, head: &parent->port->dev_list); |
932 | spin_unlock_irq(lock: &parent->port->dev_list_lock); |
933 | |
934 | res = sas_discover_expander(dev: child); |
935 | if (res) { |
936 | sas_rphy_delete(rphy); |
937 | spin_lock_irq(lock: &parent->port->dev_list_lock); |
938 | list_del(entry: &child->dev_list_node); |
939 | spin_unlock_irq(lock: &parent->port->dev_list_lock); |
940 | sas_put_device(dev: child); |
941 | sas_port_delete(phy->port); |
942 | phy->port = NULL; |
943 | return NULL; |
944 | } |
945 | list_add_tail(new: &child->siblings, head: &parent->ex_dev.children); |
946 | return child; |
947 | } |
948 | |
949 | static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) |
950 | { |
951 | struct expander_device *ex = &dev->ex_dev; |
952 | struct ex_phy *ex_phy = &ex->ex_phy[phy_id]; |
953 | struct domain_device *child = NULL; |
954 | int res = 0; |
955 | |
956 | /* Phy state */ |
957 | if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) { |
958 | if (!sas_smp_phy_control(dev, phy_id, phy_func: PHY_FUNC_LINK_RESET, NULL)) |
959 | res = sas_ex_phy_discover(dev, single: phy_id); |
960 | if (res) |
961 | return res; |
962 | } |
963 | |
964 | /* Parent and domain coherency */ |
965 | if (!dev->parent && sas_phy_match_port_addr(port: dev->port, phy: ex_phy)) { |
966 | sas_add_parent_port(dev, phy_id); |
967 | return 0; |
968 | } |
969 | if (dev->parent && sas_phy_match_dev_addr(dev: dev->parent, phy: ex_phy)) { |
970 | sas_add_parent_port(dev, phy_id); |
971 | if (ex_phy->routing_attr == TABLE_ROUTING) |
972 | sas_configure_phy(dev, phy_id, sas_addr: dev->port->sas_addr, include: 1); |
973 | return 0; |
974 | } |
975 | |
976 | if (sas_dev_present_in_domain(port: dev->port, sas_addr: ex_phy->attached_sas_addr)) |
977 | sas_ex_disable_port(dev, sas_addr: ex_phy->attached_sas_addr); |
978 | |
979 | if (ex_phy->attached_dev_type == SAS_PHY_UNUSED) { |
980 | if (ex_phy->routing_attr == DIRECT_ROUTING) { |
981 | memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |
982 | sas_configure_routing(dev, sas_addr: ex_phy->attached_sas_addr); |
983 | } |
984 | return 0; |
985 | } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN) |
986 | return 0; |
987 | |
988 | if (ex_phy->attached_dev_type != SAS_END_DEVICE && |
989 | ex_phy->attached_dev_type != SAS_FANOUT_EXPANDER_DEVICE && |
990 | ex_phy->attached_dev_type != SAS_EDGE_EXPANDER_DEVICE && |
991 | ex_phy->attached_dev_type != SAS_SATA_PENDING) { |
992 | pr_warn("unknown device type(0x%x) attached to ex %016llx phy%02d\n" , |
993 | ex_phy->attached_dev_type, |
994 | SAS_ADDR(dev->sas_addr), |
995 | phy_id); |
996 | return 0; |
997 | } |
998 | |
999 | res = sas_configure_routing(dev, sas_addr: ex_phy->attached_sas_addr); |
1000 | if (res) { |
1001 | pr_notice("configure routing for dev %016llx reported 0x%x. Forgotten\n" , |
1002 | SAS_ADDR(ex_phy->attached_sas_addr), res); |
1003 | sas_disable_routing(dev, sas_addr: ex_phy->attached_sas_addr); |
1004 | return res; |
1005 | } |
1006 | |
1007 | if (sas_ex_join_wide_port(parent: dev, phy_id)) { |
1008 | pr_debug("Attaching ex phy%02d to wide port %016llx\n" , |
1009 | phy_id, SAS_ADDR(ex_phy->attached_sas_addr)); |
1010 | return res; |
1011 | } |
1012 | |
1013 | switch (ex_phy->attached_dev_type) { |
1014 | case SAS_END_DEVICE: |
1015 | case SAS_SATA_PENDING: |
1016 | child = sas_ex_discover_end_dev(parent: dev, phy_id); |
1017 | break; |
1018 | case SAS_FANOUT_EXPANDER_DEVICE: |
1019 | if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) { |
1020 | pr_debug("second fanout expander %016llx phy%02d attached to ex %016llx phy%02d\n" , |
1021 | SAS_ADDR(ex_phy->attached_sas_addr), |
1022 | ex_phy->attached_phy_id, |
1023 | SAS_ADDR(dev->sas_addr), |
1024 | phy_id); |
1025 | sas_ex_disable_phy(dev, phy_id); |
1026 | return res; |
1027 | } else |
1028 | memcpy(dev->port->disc.fanout_sas_addr, |
1029 | ex_phy->attached_sas_addr, SAS_ADDR_SIZE); |
1030 | fallthrough; |
1031 | case SAS_EDGE_EXPANDER_DEVICE: |
1032 | child = sas_ex_discover_expander(parent: dev, phy_id); |
1033 | break; |
1034 | default: |
1035 | break; |
1036 | } |
1037 | |
1038 | if (!child) |
1039 | pr_notice("ex %016llx phy%02d failed to discover\n" , |
1040 | SAS_ADDR(dev->sas_addr), phy_id); |
1041 | return res; |
1042 | } |
1043 | |
1044 | static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr) |
1045 | { |
1046 | struct expander_device *ex = &dev->ex_dev; |
1047 | int i; |
1048 | |
1049 | for (i = 0; i < ex->num_phys; i++) { |
1050 | struct ex_phy *phy = &ex->ex_phy[i]; |
1051 | |
1052 | if (phy->phy_state == PHY_VACANT || |
1053 | phy->phy_state == PHY_NOT_PRESENT) |
1054 | continue; |
1055 | |
1056 | if (dev_is_expander(type: phy->attached_dev_type) && |
1057 | phy->routing_attr == SUBTRACTIVE_ROUTING) { |
1058 | |
1059 | memcpy(sub_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); |
1060 | |
1061 | return 1; |
1062 | } |
1063 | } |
1064 | return 0; |
1065 | } |
1066 | |
1067 | static int sas_check_level_subtractive_boundary(struct domain_device *dev) |
1068 | { |
1069 | struct expander_device *ex = &dev->ex_dev; |
1070 | struct domain_device *child; |
1071 | u8 sub_addr[SAS_ADDR_SIZE] = {0, }; |
1072 | |
1073 | list_for_each_entry(child, &ex->children, siblings) { |
1074 | if (!dev_is_expander(type: child->dev_type)) |
1075 | continue; |
1076 | if (sub_addr[0] == 0) { |
1077 | sas_find_sub_addr(dev: child, sub_addr); |
1078 | continue; |
1079 | } else { |
1080 | u8 s2[SAS_ADDR_SIZE]; |
1081 | |
1082 | if (sas_find_sub_addr(dev: child, sub_addr: s2) && |
1083 | (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) { |
1084 | |
1085 | pr_notice("ex %016llx->%016llx-?->%016llx diverges from subtractive boundary %016llx\n" , |
1086 | SAS_ADDR(dev->sas_addr), |
1087 | SAS_ADDR(child->sas_addr), |
1088 | SAS_ADDR(s2), |
1089 | SAS_ADDR(sub_addr)); |
1090 | |
1091 | sas_ex_disable_port(dev: child, sas_addr: s2); |
1092 | } |
1093 | } |
1094 | } |
1095 | return 0; |
1096 | } |
1097 | /** |
1098 | * sas_ex_discover_devices - discover devices attached to this expander |
1099 | * @dev: pointer to the expander domain device |
1100 | * @single: if you want to do a single phy, else set to -1; |
1101 | * |
1102 | * Configure this expander for use with its devices and register the |
1103 | * devices of this expander. |
1104 | */ |
1105 | static int sas_ex_discover_devices(struct domain_device *dev, int single) |
1106 | { |
1107 | struct expander_device *ex = &dev->ex_dev; |
1108 | int i = 0, end = ex->num_phys; |
1109 | int res = 0; |
1110 | |
1111 | if (0 <= single && single < end) { |
1112 | i = single; |
1113 | end = i+1; |
1114 | } |
1115 | |
1116 | for ( ; i < end; i++) { |
1117 | struct ex_phy *ex_phy = &ex->ex_phy[i]; |
1118 | |
1119 | if (ex_phy->phy_state == PHY_VACANT || |
1120 | ex_phy->phy_state == PHY_NOT_PRESENT || |
1121 | ex_phy->phy_state == PHY_DEVICE_DISCOVERED) |
1122 | continue; |
1123 | |
1124 | switch (ex_phy->linkrate) { |
1125 | case SAS_PHY_DISABLED: |
1126 | case SAS_PHY_RESET_PROBLEM: |
1127 | case SAS_SATA_PORT_SELECTOR: |
1128 | continue; |
1129 | default: |
1130 | res = sas_ex_discover_dev(dev, phy_id: i); |
1131 | if (res) |
1132 | break; |
1133 | continue; |
1134 | } |
1135 | } |
1136 | |
1137 | if (!res) |
1138 | sas_check_level_subtractive_boundary(dev); |
1139 | |
1140 | return res; |
1141 | } |
1142 | |
1143 | static int sas_check_ex_subtractive_boundary(struct domain_device *dev) |
1144 | { |
1145 | struct expander_device *ex = &dev->ex_dev; |
1146 | int i; |
1147 | u8 *sub_sas_addr = NULL; |
1148 | |
1149 | if (dev->dev_type != SAS_EDGE_EXPANDER_DEVICE) |
1150 | return 0; |
1151 | |
1152 | for (i = 0; i < ex->num_phys; i++) { |
1153 | struct ex_phy *phy = &ex->ex_phy[i]; |
1154 | |
1155 | if (phy->phy_state == PHY_VACANT || |
1156 | phy->phy_state == PHY_NOT_PRESENT) |
1157 | continue; |
1158 | |
1159 | if (dev_is_expander(type: phy->attached_dev_type) && |
1160 | phy->routing_attr == SUBTRACTIVE_ROUTING) { |
1161 | |
1162 | if (!sub_sas_addr) |
1163 | sub_sas_addr = &phy->attached_sas_addr[0]; |
1164 | else if (SAS_ADDR(sub_sas_addr) != |
1165 | SAS_ADDR(phy->attached_sas_addr)) { |
1166 | |
1167 | pr_notice("ex %016llx phy%02d diverges(%016llx) on subtractive boundary(%016llx). Disabled\n" , |
1168 | SAS_ADDR(dev->sas_addr), i, |
1169 | SAS_ADDR(phy->attached_sas_addr), |
1170 | SAS_ADDR(sub_sas_addr)); |
1171 | sas_ex_disable_phy(dev, phy_id: i); |
1172 | } |
1173 | } |
1174 | } |
1175 | return 0; |
1176 | } |
1177 | |
1178 | static void sas_print_parent_topology_bug(struct domain_device *child, |
1179 | struct ex_phy *parent_phy, |
1180 | struct ex_phy *child_phy) |
1181 | { |
1182 | static const char *ex_type[] = { |
1183 | [SAS_EDGE_EXPANDER_DEVICE] = "edge" , |
1184 | [SAS_FANOUT_EXPANDER_DEVICE] = "fanout" , |
1185 | }; |
1186 | struct domain_device *parent = child->parent; |
1187 | |
1188 | pr_notice("%s ex %016llx phy%02d <--> %s ex %016llx phy%02d has %c:%c routing link!\n" , |
1189 | ex_type[parent->dev_type], |
1190 | SAS_ADDR(parent->sas_addr), |
1191 | parent_phy->phy_id, |
1192 | |
1193 | ex_type[child->dev_type], |
1194 | SAS_ADDR(child->sas_addr), |
1195 | child_phy->phy_id, |
1196 | |
1197 | sas_route_char(parent, parent_phy), |
1198 | sas_route_char(child, child_phy)); |
1199 | } |
1200 | |
1201 | static bool sas_eeds_valid(struct domain_device *parent, |
1202 | struct domain_device *child) |
1203 | { |
1204 | struct sas_discovery *disc = &parent->port->disc; |
1205 | |
1206 | return (SAS_ADDR(disc->eeds_a) == SAS_ADDR(parent->sas_addr) || |
1207 | SAS_ADDR(disc->eeds_a) == SAS_ADDR(child->sas_addr)) && |
1208 | (SAS_ADDR(disc->eeds_b) == SAS_ADDR(parent->sas_addr) || |
1209 | SAS_ADDR(disc->eeds_b) == SAS_ADDR(child->sas_addr)); |
1210 | } |
1211 | |
1212 | static int sas_check_eeds(struct domain_device *child, |
1213 | struct ex_phy *parent_phy, |
1214 | struct ex_phy *child_phy) |
1215 | { |
1216 | int res = 0; |
1217 | struct domain_device *parent = child->parent; |
1218 | struct sas_discovery *disc = &parent->port->disc; |
1219 | |
1220 | if (SAS_ADDR(disc->fanout_sas_addr) != 0) { |
1221 | res = -ENODEV; |
1222 | pr_warn("edge ex %016llx phy S:%02d <--> edge ex %016llx phy S:%02d, while there is a fanout ex %016llx\n" , |
1223 | SAS_ADDR(parent->sas_addr), |
1224 | parent_phy->phy_id, |
1225 | SAS_ADDR(child->sas_addr), |
1226 | child_phy->phy_id, |
1227 | SAS_ADDR(disc->fanout_sas_addr)); |
1228 | } else if (SAS_ADDR(disc->eeds_a) == 0) { |
1229 | memcpy(disc->eeds_a, parent->sas_addr, SAS_ADDR_SIZE); |
1230 | memcpy(disc->eeds_b, child->sas_addr, SAS_ADDR_SIZE); |
1231 | } else if (!sas_eeds_valid(parent, child)) { |
1232 | res = -ENODEV; |
1233 | pr_warn("edge ex %016llx phy%02d <--> edge ex %016llx phy%02d link forms a third EEDS!\n" , |
1234 | SAS_ADDR(parent->sas_addr), |
1235 | parent_phy->phy_id, |
1236 | SAS_ADDR(child->sas_addr), |
1237 | child_phy->phy_id); |
1238 | } |
1239 | |
1240 | return res; |
1241 | } |
1242 | |
1243 | static int sas_check_edge_expander_topo(struct domain_device *child, |
1244 | struct ex_phy *parent_phy) |
1245 | { |
1246 | struct expander_device *child_ex = &child->ex_dev; |
1247 | struct expander_device *parent_ex = &child->parent->ex_dev; |
1248 | struct ex_phy *child_phy; |
1249 | |
1250 | child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; |
1251 | |
1252 | if (child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) { |
1253 | if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || |
1254 | child_phy->routing_attr != TABLE_ROUTING) |
1255 | goto error; |
1256 | } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { |
1257 | if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) |
1258 | return sas_check_eeds(child, parent_phy, child_phy); |
1259 | else if (child_phy->routing_attr != TABLE_ROUTING) |
1260 | goto error; |
1261 | } else if (parent_phy->routing_attr == TABLE_ROUTING) { |
1262 | if (child_phy->routing_attr != SUBTRACTIVE_ROUTING && |
1263 | (child_phy->routing_attr != TABLE_ROUTING || |
1264 | !child_ex->t2t_supp || !parent_ex->t2t_supp)) |
1265 | goto error; |
1266 | } |
1267 | |
1268 | return 0; |
1269 | error: |
1270 | sas_print_parent_topology_bug(child, parent_phy, child_phy); |
1271 | return -ENODEV; |
1272 | } |
1273 | |
1274 | static int sas_check_fanout_expander_topo(struct domain_device *child, |
1275 | struct ex_phy *parent_phy) |
1276 | { |
1277 | struct expander_device *child_ex = &child->ex_dev; |
1278 | struct ex_phy *child_phy; |
1279 | |
1280 | child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; |
1281 | |
1282 | if (parent_phy->routing_attr == TABLE_ROUTING && |
1283 | child_phy->routing_attr == SUBTRACTIVE_ROUTING) |
1284 | return 0; |
1285 | |
1286 | sas_print_parent_topology_bug(child, parent_phy, child_phy); |
1287 | |
1288 | return -ENODEV; |
1289 | } |
1290 | |
1291 | static int sas_check_parent_topology(struct domain_device *child) |
1292 | { |
1293 | struct expander_device *parent_ex; |
1294 | int i; |
1295 | int res = 0; |
1296 | |
1297 | if (!child->parent) |
1298 | return 0; |
1299 | |
1300 | if (!dev_is_expander(type: child->parent->dev_type)) |
1301 | return 0; |
1302 | |
1303 | parent_ex = &child->parent->ex_dev; |
1304 | |
1305 | for (i = 0; i < parent_ex->num_phys; i++) { |
1306 | struct ex_phy *parent_phy = &parent_ex->ex_phy[i]; |
1307 | |
1308 | if (parent_phy->phy_state == PHY_VACANT || |
1309 | parent_phy->phy_state == PHY_NOT_PRESENT) |
1310 | continue; |
1311 | |
1312 | if (!sas_phy_match_dev_addr(dev: child, phy: parent_phy)) |
1313 | continue; |
1314 | |
1315 | switch (child->parent->dev_type) { |
1316 | case SAS_EDGE_EXPANDER_DEVICE: |
1317 | if (sas_check_edge_expander_topo(child, parent_phy)) |
1318 | res = -ENODEV; |
1319 | break; |
1320 | case SAS_FANOUT_EXPANDER_DEVICE: |
1321 | if (sas_check_fanout_expander_topo(child, parent_phy)) |
1322 | res = -ENODEV; |
1323 | break; |
1324 | default: |
1325 | break; |
1326 | } |
1327 | } |
1328 | |
1329 | return res; |
1330 | } |
1331 | |
1332 | #define RRI_REQ_SIZE 16 |
1333 | #define RRI_RESP_SIZE 44 |
1334 | |
1335 | static int sas_configure_present(struct domain_device *dev, int phy_id, |
1336 | u8 *sas_addr, int *index, int *present) |
1337 | { |
1338 | int i, res = 0; |
1339 | struct expander_device *ex = &dev->ex_dev; |
1340 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
1341 | u8 *rri_req; |
1342 | u8 *rri_resp; |
1343 | |
1344 | *present = 0; |
1345 | *index = 0; |
1346 | |
1347 | rri_req = alloc_smp_req(RRI_REQ_SIZE); |
1348 | if (!rri_req) |
1349 | return -ENOMEM; |
1350 | |
1351 | rri_resp = alloc_smp_resp(RRI_RESP_SIZE); |
1352 | if (!rri_resp) { |
1353 | kfree(objp: rri_req); |
1354 | return -ENOMEM; |
1355 | } |
1356 | |
1357 | rri_req[1] = SMP_REPORT_ROUTE_INFO; |
1358 | rri_req[9] = phy_id; |
1359 | |
1360 | for (i = 0; i < ex->max_route_indexes ; i++) { |
1361 | *(__be16 *)(rri_req+6) = cpu_to_be16(i); |
1362 | res = smp_execute_task(dev, req: rri_req, RRI_REQ_SIZE, resp: rri_resp, |
1363 | RRI_RESP_SIZE); |
1364 | if (res) |
1365 | goto out; |
1366 | res = rri_resp[2]; |
1367 | if (res == SMP_RESP_NO_INDEX) { |
1368 | pr_warn("overflow of indexes: dev %016llx phy%02d index 0x%x\n" , |
1369 | SAS_ADDR(dev->sas_addr), phy_id, i); |
1370 | goto out; |
1371 | } else if (res != SMP_RESP_FUNC_ACC) { |
1372 | pr_notice("%s: dev %016llx phy%02d index 0x%x result 0x%x\n" , |
1373 | __func__, SAS_ADDR(dev->sas_addr), phy_id, |
1374 | i, res); |
1375 | goto out; |
1376 | } |
1377 | if (SAS_ADDR(sas_addr) != 0) { |
1378 | if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) { |
1379 | *index = i; |
1380 | if ((rri_resp[12] & 0x80) == 0x80) |
1381 | *present = 0; |
1382 | else |
1383 | *present = 1; |
1384 | goto out; |
1385 | } else if (SAS_ADDR(rri_resp+16) == 0) { |
1386 | *index = i; |
1387 | *present = 0; |
1388 | goto out; |
1389 | } |
1390 | } else if (SAS_ADDR(rri_resp+16) == 0 && |
1391 | phy->last_da_index < i) { |
1392 | phy->last_da_index = i; |
1393 | *index = i; |
1394 | *present = 0; |
1395 | goto out; |
1396 | } |
1397 | } |
1398 | res = -1; |
1399 | out: |
1400 | kfree(objp: rri_req); |
1401 | kfree(objp: rri_resp); |
1402 | return res; |
1403 | } |
1404 | |
1405 | #define CRI_REQ_SIZE 44 |
1406 | #define CRI_RESP_SIZE 8 |
1407 | |
1408 | static int sas_configure_set(struct domain_device *dev, int phy_id, |
1409 | u8 *sas_addr, int index, int include) |
1410 | { |
1411 | int res; |
1412 | u8 *cri_req; |
1413 | u8 *cri_resp; |
1414 | |
1415 | cri_req = alloc_smp_req(CRI_REQ_SIZE); |
1416 | if (!cri_req) |
1417 | return -ENOMEM; |
1418 | |
1419 | cri_resp = alloc_smp_resp(CRI_RESP_SIZE); |
1420 | if (!cri_resp) { |
1421 | kfree(objp: cri_req); |
1422 | return -ENOMEM; |
1423 | } |
1424 | |
1425 | cri_req[1] = SMP_CONF_ROUTE_INFO; |
1426 | *(__be16 *)(cri_req+6) = cpu_to_be16(index); |
1427 | cri_req[9] = phy_id; |
1428 | if (SAS_ADDR(sas_addr) == 0 || !include) |
1429 | cri_req[12] |= 0x80; |
1430 | memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE); |
1431 | |
1432 | res = smp_execute_task(dev, req: cri_req, CRI_REQ_SIZE, resp: cri_resp, |
1433 | CRI_RESP_SIZE); |
1434 | if (res) |
1435 | goto out; |
1436 | res = cri_resp[2]; |
1437 | if (res == SMP_RESP_NO_INDEX) { |
1438 | pr_warn("overflow of indexes: dev %016llx phy%02d index 0x%x\n" , |
1439 | SAS_ADDR(dev->sas_addr), phy_id, index); |
1440 | } |
1441 | out: |
1442 | kfree(objp: cri_req); |
1443 | kfree(objp: cri_resp); |
1444 | return res; |
1445 | } |
1446 | |
1447 | static int sas_configure_phy(struct domain_device *dev, int phy_id, |
1448 | u8 *sas_addr, int include) |
1449 | { |
1450 | int index; |
1451 | int present; |
1452 | int res; |
1453 | |
1454 | res = sas_configure_present(dev, phy_id, sas_addr, index: &index, present: &present); |
1455 | if (res) |
1456 | return res; |
1457 | if (include ^ present) |
1458 | return sas_configure_set(dev, phy_id, sas_addr, index, |
1459 | include); |
1460 | |
1461 | return res; |
1462 | } |
1463 | |
1464 | /** |
1465 | * sas_configure_parent - configure routing table of parent |
1466 | * @parent: parent expander |
1467 | * @child: child expander |
1468 | * @sas_addr: SAS port identifier of device directly attached to child |
1469 | * @include: whether or not to include @child in the expander routing table |
1470 | */ |
1471 | static int sas_configure_parent(struct domain_device *parent, |
1472 | struct domain_device *child, |
1473 | u8 *sas_addr, int include) |
1474 | { |
1475 | struct expander_device *ex_parent = &parent->ex_dev; |
1476 | int res = 0; |
1477 | int i; |
1478 | |
1479 | if (parent->parent) { |
1480 | res = sas_configure_parent(parent: parent->parent, child: parent, sas_addr, |
1481 | include); |
1482 | if (res) |
1483 | return res; |
1484 | } |
1485 | |
1486 | if (ex_parent->conf_route_table == 0) { |
1487 | pr_debug("ex %016llx has self-configuring routing table\n" , |
1488 | SAS_ADDR(parent->sas_addr)); |
1489 | return 0; |
1490 | } |
1491 | |
1492 | for (i = 0; i < ex_parent->num_phys; i++) { |
1493 | struct ex_phy *phy = &ex_parent->ex_phy[i]; |
1494 | |
1495 | if ((phy->routing_attr == TABLE_ROUTING) && |
1496 | sas_phy_match_dev_addr(dev: child, phy)) { |
1497 | res = sas_configure_phy(dev: parent, phy_id: i, sas_addr, include); |
1498 | if (res) |
1499 | return res; |
1500 | } |
1501 | } |
1502 | |
1503 | return res; |
1504 | } |
1505 | |
1506 | /** |
1507 | * sas_configure_routing - configure routing |
1508 | * @dev: expander device |
1509 | * @sas_addr: port identifier of device directly attached to the expander device |
1510 | */ |
1511 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr) |
1512 | { |
1513 | if (dev->parent) |
1514 | return sas_configure_parent(parent: dev->parent, child: dev, sas_addr, include: 1); |
1515 | return 0; |
1516 | } |
1517 | |
1518 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr) |
1519 | { |
1520 | if (dev->parent) |
1521 | return sas_configure_parent(parent: dev->parent, child: dev, sas_addr, include: 0); |
1522 | return 0; |
1523 | } |
1524 | |
1525 | /** |
1526 | * sas_discover_expander - expander discovery |
1527 | * @dev: pointer to expander domain device |
1528 | * |
1529 | * See comment in sas_discover_sata(). |
1530 | */ |
1531 | static int sas_discover_expander(struct domain_device *dev) |
1532 | { |
1533 | int res; |
1534 | |
1535 | res = sas_notify_lldd_dev_found(dev); |
1536 | if (res) |
1537 | return res; |
1538 | |
1539 | res = sas_ex_general(dev); |
1540 | if (res) |
1541 | goto out_err; |
1542 | res = sas_ex_manuf_info(dev); |
1543 | if (res) |
1544 | goto out_err; |
1545 | |
1546 | res = sas_expander_discover(dev); |
1547 | if (res) { |
1548 | pr_warn("expander %016llx discovery failed(0x%x)\n" , |
1549 | SAS_ADDR(dev->sas_addr), res); |
1550 | goto out_err; |
1551 | } |
1552 | |
1553 | sas_check_ex_subtractive_boundary(dev); |
1554 | res = sas_check_parent_topology(child: dev); |
1555 | if (res) |
1556 | goto out_err; |
1557 | return 0; |
1558 | out_err: |
1559 | sas_notify_lldd_dev_gone(dev); |
1560 | return res; |
1561 | } |
1562 | |
1563 | static int sas_ex_level_discovery(struct asd_sas_port *port, const int level) |
1564 | { |
1565 | int res = 0; |
1566 | struct domain_device *dev; |
1567 | |
1568 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { |
1569 | if (dev_is_expander(type: dev->dev_type)) { |
1570 | struct sas_expander_device *ex = |
1571 | rphy_to_expander_device(dev->rphy); |
1572 | |
1573 | if (level == ex->level) |
1574 | res = sas_ex_discover_devices(dev, single: -1); |
1575 | else if (level > 0) |
1576 | res = sas_ex_discover_devices(dev: port->port_dev, single: -1); |
1577 | |
1578 | } |
1579 | } |
1580 | |
1581 | return res; |
1582 | } |
1583 | |
1584 | static int sas_ex_bfs_disc(struct asd_sas_port *port) |
1585 | { |
1586 | int res; |
1587 | int level; |
1588 | |
1589 | do { |
1590 | level = port->disc.max_level; |
1591 | res = sas_ex_level_discovery(port, level); |
1592 | mb(); |
1593 | } while (level < port->disc.max_level); |
1594 | |
1595 | return res; |
1596 | } |
1597 | |
1598 | int sas_discover_root_expander(struct domain_device *dev) |
1599 | { |
1600 | int res; |
1601 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); |
1602 | |
1603 | res = sas_rphy_add(dev->rphy); |
1604 | if (res) |
1605 | goto out_err; |
1606 | |
1607 | ex->level = dev->port->disc.max_level; /* 0 */ |
1608 | res = sas_discover_expander(dev); |
1609 | if (res) |
1610 | goto out_err2; |
1611 | |
1612 | sas_ex_bfs_disc(port: dev->port); |
1613 | |
1614 | return res; |
1615 | |
1616 | out_err2: |
1617 | sas_rphy_remove(dev->rphy); |
1618 | out_err: |
1619 | return res; |
1620 | } |
1621 | |
1622 | /* ---------- Domain revalidation ---------- */ |
1623 | |
1624 | static int sas_get_phy_discover(struct domain_device *dev, |
1625 | int phy_id, struct smp_disc_resp *disc_resp) |
1626 | { |
1627 | int res; |
1628 | u8 *disc_req; |
1629 | |
1630 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); |
1631 | if (!disc_req) |
1632 | return -ENOMEM; |
1633 | |
1634 | disc_req[1] = SMP_DISCOVER; |
1635 | disc_req[9] = phy_id; |
1636 | |
1637 | res = smp_execute_task(dev, req: disc_req, DISCOVER_REQ_SIZE, |
1638 | resp: disc_resp, DISCOVER_RESP_SIZE); |
1639 | if (res) |
1640 | goto out; |
1641 | if (disc_resp->result != SMP_RESP_FUNC_ACC) |
1642 | res = disc_resp->result; |
1643 | out: |
1644 | kfree(objp: disc_req); |
1645 | return res; |
1646 | } |
1647 | |
1648 | static int sas_get_phy_change_count(struct domain_device *dev, |
1649 | int phy_id, int *pcc) |
1650 | { |
1651 | int res; |
1652 | struct smp_disc_resp *disc_resp; |
1653 | |
1654 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); |
1655 | if (!disc_resp) |
1656 | return -ENOMEM; |
1657 | |
1658 | res = sas_get_phy_discover(dev, phy_id, disc_resp); |
1659 | if (!res) |
1660 | *pcc = disc_resp->disc.change_count; |
1661 | |
1662 | kfree(objp: disc_resp); |
1663 | return res; |
1664 | } |
1665 | |
1666 | int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id, |
1667 | u8 *sas_addr, enum sas_device_type *type) |
1668 | { |
1669 | int res; |
1670 | struct smp_disc_resp *disc_resp; |
1671 | |
1672 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); |
1673 | if (!disc_resp) |
1674 | return -ENOMEM; |
1675 | |
1676 | res = sas_get_phy_discover(dev, phy_id, disc_resp); |
1677 | if (res == 0) { |
1678 | memcpy(sas_addr, disc_resp->disc.attached_sas_addr, |
1679 | SAS_ADDR_SIZE); |
1680 | *type = to_dev_type(dr: &disc_resp->disc); |
1681 | if (*type == 0) |
1682 | memset(sas_addr, 0, SAS_ADDR_SIZE); |
1683 | } |
1684 | kfree(objp: disc_resp); |
1685 | return res; |
1686 | } |
1687 | |
1688 | static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id, |
1689 | int from_phy, bool update) |
1690 | { |
1691 | struct expander_device *ex = &dev->ex_dev; |
1692 | int res = 0; |
1693 | int i; |
1694 | |
1695 | for (i = from_phy; i < ex->num_phys; i++) { |
1696 | int phy_change_count = 0; |
1697 | |
1698 | res = sas_get_phy_change_count(dev, phy_id: i, pcc: &phy_change_count); |
1699 | switch (res) { |
1700 | case SMP_RESP_PHY_VACANT: |
1701 | case SMP_RESP_NO_PHY: |
1702 | continue; |
1703 | case SMP_RESP_FUNC_ACC: |
1704 | break; |
1705 | default: |
1706 | return res; |
1707 | } |
1708 | |
1709 | if (phy_change_count != ex->ex_phy[i].phy_change_count) { |
1710 | if (update) |
1711 | ex->ex_phy[i].phy_change_count = |
1712 | phy_change_count; |
1713 | *phy_id = i; |
1714 | return 0; |
1715 | } |
1716 | } |
1717 | return 0; |
1718 | } |
1719 | |
1720 | static int sas_get_ex_change_count(struct domain_device *dev, int *ecc) |
1721 | { |
1722 | int res; |
1723 | u8 *rg_req; |
1724 | struct smp_rg_resp *rg_resp; |
1725 | |
1726 | rg_req = alloc_smp_req(RG_REQ_SIZE); |
1727 | if (!rg_req) |
1728 | return -ENOMEM; |
1729 | |
1730 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); |
1731 | if (!rg_resp) { |
1732 | kfree(objp: rg_req); |
1733 | return -ENOMEM; |
1734 | } |
1735 | |
1736 | rg_req[1] = SMP_REPORT_GENERAL; |
1737 | |
1738 | res = smp_execute_task(dev, req: rg_req, RG_REQ_SIZE, resp: rg_resp, |
1739 | RG_RESP_SIZE); |
1740 | if (res) |
1741 | goto out; |
1742 | if (rg_resp->result != SMP_RESP_FUNC_ACC) { |
1743 | res = rg_resp->result; |
1744 | goto out; |
1745 | } |
1746 | |
1747 | *ecc = be16_to_cpu(rg_resp->rg.change_count); |
1748 | out: |
1749 | kfree(objp: rg_resp); |
1750 | kfree(objp: rg_req); |
1751 | return res; |
1752 | } |
1753 | /** |
1754 | * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE). |
1755 | * @dev:domain device to be detect. |
1756 | * @src_dev: the device which originated BROADCAST(CHANGE). |
1757 | * |
1758 | * Add self-configuration expander support. Suppose two expander cascading, |
1759 | * when the first level expander is self-configuring, hotplug the disks in |
1760 | * second level expander, BROADCAST(CHANGE) will not only be originated |
1761 | * in the second level expander, but also be originated in the first level |
1762 | * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say, |
1763 | * expander changed count in two level expanders will all increment at least |
1764 | * once, but the phy which chang count has changed is the source device which |
1765 | * we concerned. |
1766 | */ |
1767 | |
1768 | static int sas_find_bcast_dev(struct domain_device *dev, |
1769 | struct domain_device **src_dev) |
1770 | { |
1771 | struct expander_device *ex = &dev->ex_dev; |
1772 | int ex_change_count = -1; |
1773 | int phy_id = -1; |
1774 | int res; |
1775 | struct domain_device *ch; |
1776 | |
1777 | res = sas_get_ex_change_count(dev, ecc: &ex_change_count); |
1778 | if (res) |
1779 | goto out; |
1780 | if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) { |
1781 | /* Just detect if this expander phys phy change count changed, |
1782 | * in order to determine if this expander originate BROADCAST, |
1783 | * and do not update phy change count field in our structure. |
1784 | */ |
1785 | res = sas_find_bcast_phy(dev, phy_id: &phy_id, from_phy: 0, update: false); |
1786 | if (phy_id != -1) { |
1787 | *src_dev = dev; |
1788 | ex->ex_change_count = ex_change_count; |
1789 | pr_info("ex %016llx phy%02d change count has changed\n" , |
1790 | SAS_ADDR(dev->sas_addr), phy_id); |
1791 | return res; |
1792 | } else |
1793 | pr_info("ex %016llx phys DID NOT change\n" , |
1794 | SAS_ADDR(dev->sas_addr)); |
1795 | } |
1796 | list_for_each_entry(ch, &ex->children, siblings) { |
1797 | if (dev_is_expander(type: ch->dev_type)) { |
1798 | res = sas_find_bcast_dev(dev: ch, src_dev); |
1799 | if (*src_dev) |
1800 | return res; |
1801 | } |
1802 | } |
1803 | out: |
1804 | return res; |
1805 | } |
1806 | |
1807 | static void sas_unregister_ex_tree(struct asd_sas_port *port, struct domain_device *dev) |
1808 | { |
1809 | struct expander_device *ex = &dev->ex_dev; |
1810 | struct domain_device *child, *n; |
1811 | |
1812 | list_for_each_entry_safe(child, n, &ex->children, siblings) { |
1813 | set_bit(nr: SAS_DEV_GONE, addr: &child->state); |
1814 | if (dev_is_expander(type: child->dev_type)) |
1815 | sas_unregister_ex_tree(port, dev: child); |
1816 | else |
1817 | sas_unregister_dev(port, dev: child); |
1818 | } |
1819 | sas_unregister_dev(port, dev); |
1820 | } |
1821 | |
1822 | static void sas_unregister_devs_sas_addr(struct domain_device *parent, |
1823 | int phy_id, bool last) |
1824 | { |
1825 | struct expander_device *ex_dev = &parent->ex_dev; |
1826 | struct ex_phy *phy = &ex_dev->ex_phy[phy_id]; |
1827 | struct domain_device *child, *n, *found = NULL; |
1828 | if (last) { |
1829 | list_for_each_entry_safe(child, n, |
1830 | &ex_dev->children, siblings) { |
1831 | if (sas_phy_match_dev_addr(dev: child, phy)) { |
1832 | set_bit(nr: SAS_DEV_GONE, addr: &child->state); |
1833 | if (dev_is_expander(type: child->dev_type)) |
1834 | sas_unregister_ex_tree(port: parent->port, dev: child); |
1835 | else |
1836 | sas_unregister_dev(port: parent->port, dev: child); |
1837 | found = child; |
1838 | break; |
1839 | } |
1840 | } |
1841 | sas_disable_routing(dev: parent, sas_addr: phy->attached_sas_addr); |
1842 | } |
1843 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |
1844 | if (phy->port) { |
1845 | sas_port_delete_phy(phy->port, phy->phy); |
1846 | sas_device_set_phy(dev: found, port: phy->port); |
1847 | if (phy->port->num_phys == 0) |
1848 | list_add_tail(new: &phy->port->del_list, |
1849 | head: &parent->port->sas_port_del_list); |
1850 | phy->port = NULL; |
1851 | } |
1852 | } |
1853 | |
1854 | static int sas_discover_bfs_by_root_level(struct domain_device *root, |
1855 | const int level) |
1856 | { |
1857 | struct expander_device *ex_root = &root->ex_dev; |
1858 | struct domain_device *child; |
1859 | int res = 0; |
1860 | |
1861 | list_for_each_entry(child, &ex_root->children, siblings) { |
1862 | if (dev_is_expander(type: child->dev_type)) { |
1863 | struct sas_expander_device *ex = |
1864 | rphy_to_expander_device(child->rphy); |
1865 | |
1866 | if (level > ex->level) |
1867 | res = sas_discover_bfs_by_root_level(root: child, |
1868 | level); |
1869 | else if (level == ex->level) |
1870 | res = sas_ex_discover_devices(dev: child, single: -1); |
1871 | } |
1872 | } |
1873 | return res; |
1874 | } |
1875 | |
1876 | static int sas_discover_bfs_by_root(struct domain_device *dev) |
1877 | { |
1878 | int res; |
1879 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); |
1880 | int level = ex->level+1; |
1881 | |
1882 | res = sas_ex_discover_devices(dev, single: -1); |
1883 | if (res) |
1884 | goto out; |
1885 | do { |
1886 | res = sas_discover_bfs_by_root_level(root: dev, level); |
1887 | mb(); |
1888 | level += 1; |
1889 | } while (level <= dev->port->disc.max_level); |
1890 | out: |
1891 | return res; |
1892 | } |
1893 | |
1894 | static int sas_discover_new(struct domain_device *dev, int phy_id) |
1895 | { |
1896 | struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id]; |
1897 | struct domain_device *child; |
1898 | int res; |
1899 | |
1900 | pr_debug("ex %016llx phy%02d new device attached\n" , |
1901 | SAS_ADDR(dev->sas_addr), phy_id); |
1902 | res = sas_ex_phy_discover(dev, single: phy_id); |
1903 | if (res) |
1904 | return res; |
1905 | |
1906 | if (sas_ex_join_wide_port(parent: dev, phy_id)) |
1907 | return 0; |
1908 | |
1909 | res = sas_ex_discover_devices(dev, single: phy_id); |
1910 | if (res) |
1911 | return res; |
1912 | list_for_each_entry(child, &dev->ex_dev.children, siblings) { |
1913 | if (sas_phy_match_dev_addr(dev: child, phy: ex_phy)) { |
1914 | if (dev_is_expander(type: child->dev_type)) |
1915 | res = sas_discover_bfs_by_root(dev: child); |
1916 | break; |
1917 | } |
1918 | } |
1919 | return res; |
1920 | } |
1921 | |
1922 | static bool dev_type_flutter(enum sas_device_type new, enum sas_device_type old) |
1923 | { |
1924 | if (old == new) |
1925 | return true; |
1926 | |
1927 | /* treat device directed resets as flutter, if we went |
1928 | * SAS_END_DEVICE to SAS_SATA_PENDING the link needs recovery |
1929 | */ |
1930 | if ((old == SAS_SATA_PENDING && new == SAS_END_DEVICE) || |
1931 | (old == SAS_END_DEVICE && new == SAS_SATA_PENDING)) |
1932 | return true; |
1933 | |
1934 | return false; |
1935 | } |
1936 | |
1937 | static int sas_rediscover_dev(struct domain_device *dev, int phy_id, |
1938 | bool last, int sibling) |
1939 | { |
1940 | struct expander_device *ex = &dev->ex_dev; |
1941 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
1942 | enum sas_device_type type = SAS_PHY_UNUSED; |
1943 | u8 sas_addr[SAS_ADDR_SIZE]; |
1944 | char msg[80] = "" ; |
1945 | int res; |
1946 | |
1947 | if (!last) |
1948 | sprintf(buf: msg, fmt: ", part of a wide port with phy%02d" , sibling); |
1949 | |
1950 | pr_debug("ex %016llx rediscovering phy%02d%s\n" , |
1951 | SAS_ADDR(dev->sas_addr), phy_id, msg); |
1952 | |
1953 | memset(sas_addr, 0, SAS_ADDR_SIZE); |
1954 | res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, type: &type); |
1955 | switch (res) { |
1956 | case SMP_RESP_NO_PHY: |
1957 | phy->phy_state = PHY_NOT_PRESENT; |
1958 | sas_unregister_devs_sas_addr(parent: dev, phy_id, last); |
1959 | return res; |
1960 | case SMP_RESP_PHY_VACANT: |
1961 | phy->phy_state = PHY_VACANT; |
1962 | sas_unregister_devs_sas_addr(parent: dev, phy_id, last); |
1963 | return res; |
1964 | case SMP_RESP_FUNC_ACC: |
1965 | break; |
1966 | case -ECOMM: |
1967 | break; |
1968 | default: |
1969 | return res; |
1970 | } |
1971 | |
1972 | if ((SAS_ADDR(sas_addr) == 0) || (res == -ECOMM)) { |
1973 | phy->phy_state = PHY_EMPTY; |
1974 | sas_unregister_devs_sas_addr(parent: dev, phy_id, last); |
1975 | /* |
1976 | * Even though the PHY is empty, for convenience we discover |
1977 | * the PHY to update the PHY info, like negotiated linkrate. |
1978 | */ |
1979 | sas_ex_phy_discover(dev, single: phy_id); |
1980 | return res; |
1981 | } else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) && |
1982 | dev_type_flutter(new: type, old: phy->attached_dev_type)) { |
1983 | struct domain_device *ata_dev = sas_ex_to_ata(ex_dev: dev, phy_id); |
1984 | char *action = "" ; |
1985 | |
1986 | sas_ex_phy_discover(dev, single: phy_id); |
1987 | |
1988 | if (ata_dev && phy->attached_dev_type == SAS_SATA_PENDING) |
1989 | action = ", needs recovery" ; |
1990 | pr_debug("ex %016llx phy%02d broadcast flutter%s\n" , |
1991 | SAS_ADDR(dev->sas_addr), phy_id, action); |
1992 | return res; |
1993 | } |
1994 | |
1995 | /* we always have to delete the old device when we went here */ |
1996 | pr_info("ex %016llx phy%02d replace %016llx\n" , |
1997 | SAS_ADDR(dev->sas_addr), phy_id, |
1998 | SAS_ADDR(phy->attached_sas_addr)); |
1999 | sas_unregister_devs_sas_addr(parent: dev, phy_id, last); |
2000 | |
2001 | return sas_discover_new(dev, phy_id); |
2002 | } |
2003 | |
2004 | /** |
2005 | * sas_rediscover - revalidate the domain. |
2006 | * @dev:domain device to be detect. |
2007 | * @phy_id: the phy id will be detected. |
2008 | * |
2009 | * NOTE: this process _must_ quit (return) as soon as any connection |
2010 | * errors are encountered. Connection recovery is done elsewhere. |
2011 | * Discover process only interrogates devices in order to discover the |
2012 | * domain.For plugging out, we un-register the device only when it is |
2013 | * the last phy in the port, for other phys in this port, we just delete it |
2014 | * from the port.For inserting, we do discovery when it is the |
2015 | * first phy,for other phys in this port, we add it to the port to |
2016 | * forming the wide-port. |
2017 | */ |
2018 | static int sas_rediscover(struct domain_device *dev, const int phy_id) |
2019 | { |
2020 | struct expander_device *ex = &dev->ex_dev; |
2021 | struct ex_phy *changed_phy = &ex->ex_phy[phy_id]; |
2022 | int res = 0; |
2023 | int i; |
2024 | bool last = true; /* is this the last phy of the port */ |
2025 | |
2026 | pr_debug("ex %016llx phy%02d originated BROADCAST(CHANGE)\n" , |
2027 | SAS_ADDR(dev->sas_addr), phy_id); |
2028 | |
2029 | if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) { |
2030 | for (i = 0; i < ex->num_phys; i++) { |
2031 | struct ex_phy *phy = &ex->ex_phy[i]; |
2032 | |
2033 | if (i == phy_id) |
2034 | continue; |
2035 | if (sas_phy_addr_match(p1: phy, p2: changed_phy)) { |
2036 | last = false; |
2037 | break; |
2038 | } |
2039 | } |
2040 | res = sas_rediscover_dev(dev, phy_id, last, sibling: i); |
2041 | } else |
2042 | res = sas_discover_new(dev, phy_id); |
2043 | return res; |
2044 | } |
2045 | |
2046 | /** |
2047 | * sas_ex_revalidate_domain - revalidate the domain |
2048 | * @port_dev: port domain device. |
2049 | * |
2050 | * NOTE: this process _must_ quit (return) as soon as any connection |
2051 | * errors are encountered. Connection recovery is done elsewhere. |
2052 | * Discover process only interrogates devices in order to discover the |
2053 | * domain. |
2054 | */ |
2055 | int sas_ex_revalidate_domain(struct domain_device *port_dev) |
2056 | { |
2057 | int res; |
2058 | struct domain_device *dev = NULL; |
2059 | |
2060 | res = sas_find_bcast_dev(dev: port_dev, src_dev: &dev); |
2061 | if (res == 0 && dev) { |
2062 | struct expander_device *ex = &dev->ex_dev; |
2063 | int i = 0, phy_id; |
2064 | |
2065 | do { |
2066 | phy_id = -1; |
2067 | res = sas_find_bcast_phy(dev, phy_id: &phy_id, from_phy: i, update: true); |
2068 | if (phy_id == -1) |
2069 | break; |
2070 | res = sas_rediscover(dev, phy_id); |
2071 | i = phy_id + 1; |
2072 | } while (i < ex->num_phys); |
2073 | } |
2074 | return res; |
2075 | } |
2076 | |
2077 | int sas_find_attached_phy_id(struct expander_device *ex_dev, |
2078 | struct domain_device *dev) |
2079 | { |
2080 | struct ex_phy *phy; |
2081 | int phy_id; |
2082 | |
2083 | for (phy_id = 0; phy_id < ex_dev->num_phys; phy_id++) { |
2084 | phy = &ex_dev->ex_phy[phy_id]; |
2085 | if (sas_phy_match_dev_addr(dev, phy)) |
2086 | return phy_id; |
2087 | } |
2088 | |
2089 | return -ENODEV; |
2090 | } |
2091 | EXPORT_SYMBOL_GPL(sas_find_attached_phy_id); |
2092 | |
2093 | void sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost, |
2094 | struct sas_rphy *rphy) |
2095 | { |
2096 | struct domain_device *dev; |
2097 | unsigned int rcvlen = 0; |
2098 | int ret = -EINVAL; |
2099 | |
2100 | /* no rphy means no smp target support (ie aic94xx host) */ |
2101 | if (!rphy) |
2102 | return sas_smp_host_handler(job, shost); |
2103 | |
2104 | switch (rphy->identify.device_type) { |
2105 | case SAS_EDGE_EXPANDER_DEVICE: |
2106 | case SAS_FANOUT_EXPANDER_DEVICE: |
2107 | break; |
2108 | default: |
2109 | pr_err("%s: can we send a smp request to a device?\n" , |
2110 | __func__); |
2111 | goto out; |
2112 | } |
2113 | |
2114 | dev = sas_find_dev_by_rphy(rphy); |
2115 | if (!dev) { |
2116 | pr_err("%s: fail to find a domain_device?\n" , __func__); |
2117 | goto out; |
2118 | } |
2119 | |
2120 | /* do we need to support multiple segments? */ |
2121 | if (job->request_payload.sg_cnt > 1 || |
2122 | job->reply_payload.sg_cnt > 1) { |
2123 | pr_info("%s: multiple segments req %u, rsp %u\n" , |
2124 | __func__, job->request_payload.payload_len, |
2125 | job->reply_payload.payload_len); |
2126 | goto out; |
2127 | } |
2128 | |
2129 | ret = smp_execute_task_sg(dev, req: job->request_payload.sg_list, |
2130 | resp: job->reply_payload.sg_list); |
2131 | if (ret >= 0) { |
2132 | /* bsg_job_done() requires the length received */ |
2133 | rcvlen = job->reply_payload.payload_len - ret; |
2134 | ret = 0; |
2135 | } |
2136 | |
2137 | out: |
2138 | bsg_job_done(job, result: ret, reply_payload_rcv_len: rcvlen); |
2139 | } |
2140 | |