Commit | Line | Data |
---|---|---|
2908d778 JB |
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 | ||
2908d778 | 25 | #include <linux/scatterlist.h> |
ba1fc175 | 26 | #include <linux/blkdev.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
2908d778 JB |
28 | |
29 | #include "sas_internal.h" | |
30 | ||
b52df417 | 31 | #include <scsi/sas_ata.h> |
2908d778 JB |
32 | #include <scsi/scsi_transport.h> |
33 | #include <scsi/scsi_transport_sas.h> | |
34 | #include "../scsi_sas_internal.h" | |
35 | ||
36 | static int sas_discover_expander(struct domain_device *dev); | |
37 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr); | |
38 | static int sas_configure_phy(struct domain_device *dev, int phy_id, | |
39 | u8 *sas_addr, int include); | |
40 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr); | |
41 | ||
2908d778 JB |
42 | /* ---------- SMP task management ---------- */ |
43 | ||
44 | static void smp_task_timedout(unsigned long _task) | |
45 | { | |
46 | struct sas_task *task = (void *) _task; | |
47 | unsigned long flags; | |
48 | ||
49 | spin_lock_irqsave(&task->task_state_lock, flags); | |
50 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
51 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
52 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
53 | ||
54 | complete(&task->completion); | |
55 | } | |
56 | ||
57 | static void smp_task_done(struct sas_task *task) | |
58 | { | |
59 | if (!del_timer(&task->timer)) | |
60 | return; | |
61 | complete(&task->completion); | |
62 | } | |
63 | ||
64 | /* Give it some long enough timeout. In seconds. */ | |
65 | #define SMP_TIMEOUT 10 | |
66 | ||
67 | static int smp_execute_task(struct domain_device *dev, void *req, int req_size, | |
68 | void *resp, int resp_size) | |
69 | { | |
42961ee8 | 70 | int res, retry; |
71 | struct sas_task *task = NULL; | |
2908d778 JB |
72 | struct sas_internal *i = |
73 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
74 | ||
89d3cf6a | 75 | mutex_lock(&dev->ex_dev.cmd_mutex); |
42961ee8 | 76 | for (retry = 0; retry < 3; retry++) { |
3a9c5560 DW |
77 | if (test_bit(SAS_DEV_GONE, &dev->state)) { |
78 | res = -ECOMM; | |
79 | break; | |
80 | } | |
81 | ||
42961ee8 | 82 | task = sas_alloc_task(GFP_KERNEL); |
89d3cf6a JS |
83 | if (!task) { |
84 | res = -ENOMEM; | |
85 | break; | |
86 | } | |
42961ee8 | 87 | task->dev = dev; |
88 | task->task_proto = dev->tproto; | |
89 | sg_init_one(&task->smp_task.smp_req, req, req_size); | |
90 | sg_init_one(&task->smp_task.smp_resp, resp, resp_size); | |
2908d778 | 91 | |
42961ee8 | 92 | task->task_done = smp_task_done; |
2908d778 | 93 | |
42961ee8 | 94 | task->timer.data = (unsigned long) task; |
95 | task->timer.function = smp_task_timedout; | |
96 | task->timer.expires = jiffies + SMP_TIMEOUT*HZ; | |
97 | add_timer(&task->timer); | |
2908d778 | 98 | |
42961ee8 | 99 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); |
2908d778 | 100 | |
42961ee8 | 101 | if (res) { |
102 | del_timer(&task->timer); | |
103 | SAS_DPRINTK("executing SMP task failed:%d\n", res); | |
89d3cf6a | 104 | break; |
2908d778 | 105 | } |
42961ee8 | 106 | |
107 | wait_for_completion(&task->completion); | |
32e8ae36 | 108 | res = -ECOMM; |
42961ee8 | 109 | if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { |
110 | SAS_DPRINTK("smp task timed out or aborted\n"); | |
111 | i->dft->lldd_abort_task(task); | |
112 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { | |
113 | SAS_DPRINTK("SMP task aborted and not done\n"); | |
89d3cf6a | 114 | break; |
42961ee8 | 115 | } |
116 | } | |
117 | if (task->task_status.resp == SAS_TASK_COMPLETE && | |
df64d3ca | 118 | task->task_status.stat == SAM_STAT_GOOD) { |
42961ee8 | 119 | res = 0; |
120 | break; | |
89d3cf6a JS |
121 | } |
122 | if (task->task_status.resp == SAS_TASK_COMPLETE && | |
123 | task->task_status.stat == SAS_DATA_UNDERRUN) { | |
2d4b63e1 JB |
124 | /* no error, but return the number of bytes of |
125 | * underrun */ | |
126 | res = task->task_status.residual; | |
127 | break; | |
89d3cf6a JS |
128 | } |
129 | if (task->task_status.resp == SAS_TASK_COMPLETE && | |
130 | task->task_status.stat == SAS_DATA_OVERRUN) { | |
2d4b63e1 JB |
131 | res = -EMSGSIZE; |
132 | break; | |
36a39947 DW |
133 | } |
134 | if (task->task_status.resp == SAS_TASK_UNDELIVERED && | |
135 | task->task_status.stat == SAS_DEVICE_UNKNOWN) | |
136 | break; | |
137 | else { | |
42961ee8 | 138 | SAS_DPRINTK("%s: task to dev %016llx response: 0x%x " |
cadbd4a5 | 139 | "status 0x%x\n", __func__, |
42961ee8 | 140 | SAS_ADDR(dev->sas_addr), |
141 | task->task_status.resp, | |
142 | task->task_status.stat); | |
143 | sas_free_task(task); | |
144 | task = NULL; | |
145 | } | |
2908d778 | 146 | } |
89d3cf6a JS |
147 | mutex_unlock(&dev->ex_dev.cmd_mutex); |
148 | ||
42961ee8 | 149 | BUG_ON(retry == 3 && task != NULL); |
89d3cf6a | 150 | sas_free_task(task); |
2908d778 JB |
151 | return res; |
152 | } | |
153 | ||
154 | /* ---------- Allocations ---------- */ | |
155 | ||
156 | static inline void *alloc_smp_req(int size) | |
157 | { | |
158 | u8 *p = kzalloc(size, GFP_KERNEL); | |
159 | if (p) | |
160 | p[0] = SMP_REQUEST; | |
161 | return p; | |
162 | } | |
163 | ||
164 | static inline void *alloc_smp_resp(int size) | |
165 | { | |
166 | return kzalloc(size, GFP_KERNEL); | |
167 | } | |
168 | ||
d214d81e DW |
169 | static char sas_route_char(struct domain_device *dev, struct ex_phy *phy) |
170 | { | |
171 | switch (phy->routing_attr) { | |
172 | case TABLE_ROUTING: | |
173 | if (dev->ex_dev.t2t_supp) | |
174 | return 'U'; | |
175 | else | |
176 | return 'T'; | |
177 | case DIRECT_ROUTING: | |
178 | return 'D'; | |
179 | case SUBTRACTIVE_ROUTING: | |
180 | return 'S'; | |
181 | default: | |
182 | return '?'; | |
183 | } | |
184 | } | |
2908d778 | 185 | |
354cf829 | 186 | static enum sas_dev_type to_dev_type(struct discover_resp *dr) |
2908d778 | 187 | { |
354cf829 DW |
188 | /* This is detecting a failure to transmit initial dev to host |
189 | * FIS as described in section J.5 of sas-2 r16 | |
190 | */ | |
191 | if (dr->attached_dev_type == NO_DEVICE && dr->attached_sata_dev && | |
192 | dr->linkrate >= SAS_LINK_RATE_1_5_GBPS) | |
193 | return SATA_PENDING; | |
194 | else | |
195 | return dr->attached_dev_type; | |
196 | } | |
197 | ||
198 | static void sas_set_ex_phy(struct domain_device *dev, int phy_id, void *rsp) | |
199 | { | |
200 | enum sas_dev_type dev_type; | |
201 | enum sas_linkrate linkrate; | |
202 | u8 sas_addr[SAS_ADDR_SIZE]; | |
203 | struct smp_resp *resp = rsp; | |
204 | struct discover_resp *dr = &resp->disc; | |
2908d778 JB |
205 | struct expander_device *ex = &dev->ex_dev; |
206 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
2908d778 | 207 | struct sas_rphy *rphy = dev->rphy; |
d214d81e DW |
208 | bool new_phy = !phy->phy; |
209 | char *type; | |
2908d778 | 210 | |
d214d81e | 211 | if (new_phy) { |
2908d778 JB |
212 | phy->phy = sas_phy_alloc(&rphy->dev, phy_id); |
213 | ||
214 | /* FIXME: error_handling */ | |
215 | BUG_ON(!phy->phy); | |
216 | } | |
217 | ||
218 | switch (resp->result) { | |
219 | case SMP_RESP_PHY_VACANT: | |
220 | phy->phy_state = PHY_VACANT; | |
2bc72c91 | 221 | break; |
2908d778 JB |
222 | default: |
223 | phy->phy_state = PHY_NOT_PRESENT; | |
2bc72c91 | 224 | break; |
2908d778 JB |
225 | case SMP_RESP_FUNC_ACC: |
226 | phy->phy_state = PHY_EMPTY; /* do not know yet */ | |
227 | break; | |
228 | } | |
229 | ||
354cf829 DW |
230 | /* check if anything important changed to squelch debug */ |
231 | dev_type = phy->attached_dev_type; | |
232 | linkrate = phy->linkrate; | |
233 | memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
234 | ||
235 | phy->attached_dev_type = to_dev_type(dr); | |
2908d778 | 236 | phy->phy_id = phy_id; |
2908d778 JB |
237 | phy->linkrate = dr->linkrate; |
238 | phy->attached_sata_host = dr->attached_sata_host; | |
239 | phy->attached_sata_dev = dr->attached_sata_dev; | |
240 | phy->attached_sata_ps = dr->attached_sata_ps; | |
241 | phy->attached_iproto = dr->iproto << 1; | |
242 | phy->attached_tproto = dr->tproto << 1; | |
243 | memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE); | |
244 | phy->attached_phy_id = dr->attached_phy_id; | |
245 | phy->phy_change_count = dr->change_count; | |
246 | phy->routing_attr = dr->routing_attr; | |
247 | phy->virtual = dr->virtual; | |
248 | phy->last_da_index = -1; | |
249 | ||
bb041a0e | 250 | phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr); |
354cf829 | 251 | phy->phy->identify.device_type = dr->attached_dev_type; |
2908d778 JB |
252 | phy->phy->identify.initiator_port_protocols = phy->attached_iproto; |
253 | phy->phy->identify.target_port_protocols = phy->attached_tproto; | |
254 | phy->phy->identify.phy_identifier = phy_id; | |
a01e70e5 JB |
255 | phy->phy->minimum_linkrate_hw = dr->hmin_linkrate; |
256 | phy->phy->maximum_linkrate_hw = dr->hmax_linkrate; | |
257 | phy->phy->minimum_linkrate = dr->pmin_linkrate; | |
258 | phy->phy->maximum_linkrate = dr->pmax_linkrate; | |
88edf746 | 259 | phy->phy->negotiated_linkrate = phy->linkrate; |
2908d778 | 260 | |
d214d81e | 261 | if (new_phy) |
2bc72c91 JW |
262 | if (sas_phy_add(phy->phy)) { |
263 | sas_phy_free(phy->phy); | |
264 | return; | |
265 | } | |
2908d778 | 266 | |
d214d81e | 267 | switch (phy->attached_dev_type) { |
354cf829 DW |
268 | case SATA_PENDING: |
269 | type = "stp pending"; | |
270 | break; | |
d214d81e DW |
271 | case NO_DEVICE: |
272 | type = "no device"; | |
273 | break; | |
274 | case SAS_END_DEV: | |
275 | if (phy->attached_iproto) { | |
276 | if (phy->attached_tproto) | |
277 | type = "host+target"; | |
278 | else | |
279 | type = "host"; | |
280 | } else { | |
281 | if (dr->attached_sata_dev) | |
282 | type = "stp"; | |
283 | else | |
284 | type = "ssp"; | |
285 | } | |
286 | break; | |
287 | case EDGE_DEV: | |
288 | case FANOUT_DEV: | |
289 | type = "smp"; | |
290 | break; | |
291 | default: | |
292 | type = "unknown"; | |
293 | } | |
2908d778 | 294 | |
354cf829 DW |
295 | /* this routine is polled by libata error recovery so filter |
296 | * unimportant messages | |
297 | */ | |
298 | if (new_phy || phy->attached_dev_type != dev_type || | |
299 | phy->linkrate != linkrate || | |
300 | SAS_ADDR(phy->attached_sas_addr) != SAS_ADDR(sas_addr)) | |
301 | /* pass */; | |
302 | else | |
303 | return; | |
304 | ||
d214d81e DW |
305 | SAS_DPRINTK("ex %016llx phy%02d:%c:%X attached: %016llx (%s)\n", |
306 | SAS_ADDR(dev->sas_addr), phy->phy_id, | |
307 | sas_route_char(dev, phy), phy->linkrate, | |
308 | SAS_ADDR(phy->attached_sas_addr), type); | |
2908d778 JB |
309 | } |
310 | ||
b52df417 | 311 | /* check if we have an existing attached ata device on this expander phy */ |
81c757bc | 312 | struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id) |
b52df417 DW |
313 | { |
314 | struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id]; | |
315 | struct domain_device *dev; | |
316 | struct sas_rphy *rphy; | |
317 | ||
318 | if (!ex_phy->port) | |
319 | return NULL; | |
320 | ||
321 | rphy = ex_phy->port->rphy; | |
322 | if (!rphy) | |
323 | return NULL; | |
324 | ||
325 | dev = sas_find_dev_by_rphy(rphy); | |
326 | ||
327 | if (dev && dev_is_sata(dev)) | |
328 | return dev; | |
329 | ||
330 | return NULL; | |
331 | } | |
332 | ||
2908d778 JB |
333 | #define DISCOVER_REQ_SIZE 16 |
334 | #define DISCOVER_RESP_SIZE 56 | |
335 | ||
1acce194 JB |
336 | static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req, |
337 | u8 *disc_resp, int single) | |
338 | { | |
354cf829 DW |
339 | struct discover_resp *dr; |
340 | int res; | |
1acce194 JB |
341 | |
342 | disc_req[9] = single; | |
1acce194 | 343 | |
354cf829 DW |
344 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, |
345 | disc_resp, DISCOVER_RESP_SIZE); | |
346 | if (res) | |
347 | return res; | |
348 | dr = &((struct smp_resp *)disc_resp)->disc; | |
349 | if (memcmp(dev->sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE) == 0) { | |
350 | sas_printk("Found loopback topology, just ignore it!\n"); | |
351 | return 0; | |
1acce194 JB |
352 | } |
353 | sas_set_ex_phy(dev, single, disc_resp); | |
354 | return 0; | |
355 | } | |
356 | ||
354cf829 | 357 | int sas_ex_phy_discover(struct domain_device *dev, int single) |
2908d778 JB |
358 | { |
359 | struct expander_device *ex = &dev->ex_dev; | |
360 | int res = 0; | |
361 | u8 *disc_req; | |
362 | u8 *disc_resp; | |
363 | ||
364 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); | |
365 | if (!disc_req) | |
366 | return -ENOMEM; | |
367 | ||
368 | disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE); | |
369 | if (!disc_resp) { | |
370 | kfree(disc_req); | |
371 | return -ENOMEM; | |
372 | } | |
373 | ||
374 | disc_req[1] = SMP_DISCOVER; | |
375 | ||
376 | if (0 <= single && single < ex->num_phys) { | |
1acce194 | 377 | res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single); |
2908d778 JB |
378 | } else { |
379 | int i; | |
380 | ||
381 | for (i = 0; i < ex->num_phys; i++) { | |
1acce194 JB |
382 | res = sas_ex_phy_discover_helper(dev, disc_req, |
383 | disc_resp, i); | |
2908d778 JB |
384 | if (res) |
385 | goto out_err; | |
2908d778 JB |
386 | } |
387 | } | |
388 | out_err: | |
389 | kfree(disc_resp); | |
390 | kfree(disc_req); | |
391 | return res; | |
392 | } | |
393 | ||
394 | static int sas_expander_discover(struct domain_device *dev) | |
395 | { | |
396 | struct expander_device *ex = &dev->ex_dev; | |
397 | int res = -ENOMEM; | |
398 | ||
399 | ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL); | |
400 | if (!ex->ex_phy) | |
401 | return -ENOMEM; | |
402 | ||
403 | res = sas_ex_phy_discover(dev, -1); | |
404 | if (res) | |
405 | goto out_err; | |
406 | ||
407 | return 0; | |
408 | out_err: | |
409 | kfree(ex->ex_phy); | |
410 | ex->ex_phy = NULL; | |
411 | return res; | |
412 | } | |
413 | ||
414 | #define MAX_EXPANDER_PHYS 128 | |
415 | ||
416 | static void ex_assign_report_general(struct domain_device *dev, | |
417 | struct smp_resp *resp) | |
418 | { | |
419 | struct report_general_resp *rg = &resp->rg; | |
420 | ||
421 | dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count); | |
422 | dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes); | |
423 | dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS); | |
ffaac8f4 | 424 | dev->ex_dev.t2t_supp = rg->t2t_supp; |
2908d778 JB |
425 | dev->ex_dev.conf_route_table = rg->conf_route_table; |
426 | dev->ex_dev.configuring = rg->configuring; | |
427 | memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8); | |
428 | } | |
429 | ||
430 | #define RG_REQ_SIZE 8 | |
431 | #define RG_RESP_SIZE 32 | |
432 | ||
433 | static int sas_ex_general(struct domain_device *dev) | |
434 | { | |
435 | u8 *rg_req; | |
436 | struct smp_resp *rg_resp; | |
437 | int res; | |
438 | int i; | |
439 | ||
440 | rg_req = alloc_smp_req(RG_REQ_SIZE); | |
441 | if (!rg_req) | |
442 | return -ENOMEM; | |
443 | ||
444 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); | |
445 | if (!rg_resp) { | |
446 | kfree(rg_req); | |
447 | return -ENOMEM; | |
448 | } | |
449 | ||
450 | rg_req[1] = SMP_REPORT_GENERAL; | |
451 | ||
452 | for (i = 0; i < 5; i++) { | |
453 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, | |
454 | RG_RESP_SIZE); | |
455 | ||
456 | if (res) { | |
457 | SAS_DPRINTK("RG to ex %016llx failed:0x%x\n", | |
458 | SAS_ADDR(dev->sas_addr), res); | |
459 | goto out; | |
460 | } else if (rg_resp->result != SMP_RESP_FUNC_ACC) { | |
461 | SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n", | |
462 | SAS_ADDR(dev->sas_addr), rg_resp->result); | |
463 | res = rg_resp->result; | |
464 | goto out; | |
465 | } | |
466 | ||
467 | ex_assign_report_general(dev, rg_resp); | |
468 | ||
469 | if (dev->ex_dev.configuring) { | |
470 | SAS_DPRINTK("RG: ex %llx self-configuring...\n", | |
471 | SAS_ADDR(dev->sas_addr)); | |
472 | schedule_timeout_interruptible(5*HZ); | |
473 | } else | |
474 | break; | |
475 | } | |
476 | out: | |
477 | kfree(rg_req); | |
478 | kfree(rg_resp); | |
479 | return res; | |
480 | } | |
481 | ||
482 | static void ex_assign_manuf_info(struct domain_device *dev, void | |
483 | *_mi_resp) | |
484 | { | |
485 | u8 *mi_resp = _mi_resp; | |
486 | struct sas_rphy *rphy = dev->rphy; | |
487 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); | |
488 | ||
489 | memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN); | |
490 | memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN); | |
491 | memcpy(edev->product_rev, mi_resp + 36, | |
492 | SAS_EXPANDER_PRODUCT_REV_LEN); | |
493 | ||
494 | if (mi_resp[8] & 1) { | |
495 | memcpy(edev->component_vendor_id, mi_resp + 40, | |
496 | SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN); | |
497 | edev->component_id = mi_resp[48] << 8 | mi_resp[49]; | |
498 | edev->component_revision_id = mi_resp[50]; | |
499 | } | |
500 | } | |
501 | ||
502 | #define MI_REQ_SIZE 8 | |
503 | #define MI_RESP_SIZE 64 | |
504 | ||
505 | static int sas_ex_manuf_info(struct domain_device *dev) | |
506 | { | |
507 | u8 *mi_req; | |
508 | u8 *mi_resp; | |
509 | int res; | |
510 | ||
511 | mi_req = alloc_smp_req(MI_REQ_SIZE); | |
512 | if (!mi_req) | |
513 | return -ENOMEM; | |
514 | ||
515 | mi_resp = alloc_smp_resp(MI_RESP_SIZE); | |
516 | if (!mi_resp) { | |
517 | kfree(mi_req); | |
518 | return -ENOMEM; | |
519 | } | |
520 | ||
521 | mi_req[1] = SMP_REPORT_MANUF_INFO; | |
522 | ||
523 | res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE); | |
524 | if (res) { | |
525 | SAS_DPRINTK("MI: ex %016llx failed:0x%x\n", | |
526 | SAS_ADDR(dev->sas_addr), res); | |
527 | goto out; | |
528 | } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) { | |
529 | SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n", | |
530 | SAS_ADDR(dev->sas_addr), mi_resp[2]); | |
531 | goto out; | |
532 | } | |
533 | ||
534 | ex_assign_manuf_info(dev, mi_resp); | |
535 | out: | |
536 | kfree(mi_req); | |
537 | kfree(mi_resp); | |
538 | return res; | |
539 | } | |
540 | ||
541 | #define PC_REQ_SIZE 44 | |
542 | #define PC_RESP_SIZE 8 | |
543 | ||
544 | int sas_smp_phy_control(struct domain_device *dev, int phy_id, | |
a01e70e5 JB |
545 | enum phy_func phy_func, |
546 | struct sas_phy_linkrates *rates) | |
2908d778 JB |
547 | { |
548 | u8 *pc_req; | |
549 | u8 *pc_resp; | |
550 | int res; | |
551 | ||
552 | pc_req = alloc_smp_req(PC_REQ_SIZE); | |
553 | if (!pc_req) | |
554 | return -ENOMEM; | |
555 | ||
556 | pc_resp = alloc_smp_resp(PC_RESP_SIZE); | |
557 | if (!pc_resp) { | |
558 | kfree(pc_req); | |
559 | return -ENOMEM; | |
560 | } | |
561 | ||
562 | pc_req[1] = SMP_PHY_CONTROL; | |
563 | pc_req[9] = phy_id; | |
564 | pc_req[10]= phy_func; | |
a01e70e5 JB |
565 | if (rates) { |
566 | pc_req[32] = rates->minimum_linkrate << 4; | |
567 | pc_req[33] = rates->maximum_linkrate << 4; | |
568 | } | |
2908d778 JB |
569 | |
570 | res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE); | |
571 | ||
572 | kfree(pc_resp); | |
573 | kfree(pc_req); | |
574 | return res; | |
575 | } | |
576 | ||
577 | static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) | |
578 | { | |
579 | struct expander_device *ex = &dev->ex_dev; | |
580 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
581 | ||
a01e70e5 | 582 | sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL); |
88edf746 | 583 | phy->linkrate = SAS_PHY_DISABLED; |
2908d778 JB |
584 | } |
585 | ||
586 | static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr) | |
587 | { | |
588 | struct expander_device *ex = &dev->ex_dev; | |
589 | int i; | |
590 | ||
591 | for (i = 0; i < ex->num_phys; i++) { | |
592 | struct ex_phy *phy = &ex->ex_phy[i]; | |
593 | ||
594 | if (phy->phy_state == PHY_VACANT || | |
595 | phy->phy_state == PHY_NOT_PRESENT) | |
596 | continue; | |
597 | ||
598 | if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr)) | |
599 | sas_ex_disable_phy(dev, i); | |
600 | } | |
601 | } | |
602 | ||
603 | static int sas_dev_present_in_domain(struct asd_sas_port *port, | |
604 | u8 *sas_addr) | |
605 | { | |
606 | struct domain_device *dev; | |
607 | ||
608 | if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr)) | |
609 | return 1; | |
610 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
611 | if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr)) | |
612 | return 1; | |
613 | } | |
614 | return 0; | |
615 | } | |
616 | ||
617 | #define RPEL_REQ_SIZE 16 | |
618 | #define RPEL_RESP_SIZE 32 | |
619 | int sas_smp_get_phy_events(struct sas_phy *phy) | |
620 | { | |
621 | int res; | |
92631fa4 JJ |
622 | u8 *req; |
623 | u8 *resp; | |
2908d778 JB |
624 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); |
625 | struct domain_device *dev = sas_find_dev_by_rphy(rphy); | |
2908d778 | 626 | |
92631fa4 JJ |
627 | req = alloc_smp_req(RPEL_REQ_SIZE); |
628 | if (!req) | |
2908d778 JB |
629 | return -ENOMEM; |
630 | ||
92631fa4 JJ |
631 | resp = alloc_smp_resp(RPEL_RESP_SIZE); |
632 | if (!resp) { | |
633 | kfree(req); | |
634 | return -ENOMEM; | |
635 | } | |
636 | ||
2908d778 JB |
637 | req[1] = SMP_REPORT_PHY_ERR_LOG; |
638 | req[9] = phy->number; | |
639 | ||
640 | res = smp_execute_task(dev, req, RPEL_REQ_SIZE, | |
641 | resp, RPEL_RESP_SIZE); | |
642 | ||
643 | if (!res) | |
644 | goto out; | |
645 | ||
646 | phy->invalid_dword_count = scsi_to_u32(&resp[12]); | |
647 | phy->running_disparity_error_count = scsi_to_u32(&resp[16]); | |
648 | phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]); | |
649 | phy->phy_reset_problem_count = scsi_to_u32(&resp[24]); | |
650 | ||
651 | out: | |
652 | kfree(resp); | |
653 | return res; | |
654 | ||
655 | } | |
656 | ||
b9142174 JB |
657 | #ifdef CONFIG_SCSI_SAS_ATA |
658 | ||
2908d778 JB |
659 | #define RPS_REQ_SIZE 16 |
660 | #define RPS_RESP_SIZE 60 | |
661 | ||
354cf829 DW |
662 | int sas_get_report_phy_sata(struct domain_device *dev, int phy_id, |
663 | struct smp_resp *rps_resp) | |
2908d778 JB |
664 | { |
665 | int res; | |
666 | u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE); | |
1acce194 | 667 | u8 *resp = (u8 *)rps_resp; |
2908d778 JB |
668 | |
669 | if (!rps_req) | |
670 | return -ENOMEM; | |
671 | ||
672 | rps_req[1] = SMP_REPORT_PHY_SATA; | |
673 | rps_req[9] = phy_id; | |
674 | ||
675 | res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE, | |
676 | rps_resp, RPS_RESP_SIZE); | |
677 | ||
1acce194 JB |
678 | /* 0x34 is the FIS type for the D2H fis. There's a potential |
679 | * standards cockup here. sas-2 explicitly specifies the FIS | |
680 | * should be encoded so that FIS type is in resp[24]. | |
681 | * However, some expanders endian reverse this. Undo the | |
682 | * reversal here */ | |
683 | if (!res && resp[27] == 0x34 && resp[24] != 0x34) { | |
684 | int i; | |
685 | ||
686 | for (i = 0; i < 5; i++) { | |
687 | int j = 24 + (i*4); | |
688 | u8 a, b; | |
689 | a = resp[j + 0]; | |
690 | b = resp[j + 1]; | |
691 | resp[j + 0] = resp[j + 3]; | |
692 | resp[j + 1] = resp[j + 2]; | |
693 | resp[j + 2] = b; | |
694 | resp[j + 3] = a; | |
695 | } | |
696 | } | |
697 | ||
2908d778 | 698 | kfree(rps_req); |
1acce194 | 699 | return res; |
2908d778 | 700 | } |
b9142174 | 701 | #endif |
2908d778 JB |
702 | |
703 | static void sas_ex_get_linkrate(struct domain_device *parent, | |
704 | struct domain_device *child, | |
705 | struct ex_phy *parent_phy) | |
706 | { | |
707 | struct expander_device *parent_ex = &parent->ex_dev; | |
708 | struct sas_port *port; | |
709 | int i; | |
710 | ||
711 | child->pathways = 0; | |
712 | ||
713 | port = parent_phy->port; | |
714 | ||
715 | for (i = 0; i < parent_ex->num_phys; i++) { | |
716 | struct ex_phy *phy = &parent_ex->ex_phy[i]; | |
717 | ||
718 | if (phy->phy_state == PHY_VACANT || | |
719 | phy->phy_state == PHY_NOT_PRESENT) | |
720 | continue; | |
721 | ||
722 | if (SAS_ADDR(phy->attached_sas_addr) == | |
723 | SAS_ADDR(child->sas_addr)) { | |
724 | ||
725 | child->min_linkrate = min(parent->min_linkrate, | |
726 | phy->linkrate); | |
727 | child->max_linkrate = max(parent->max_linkrate, | |
728 | phy->linkrate); | |
729 | child->pathways++; | |
730 | sas_port_add_phy(port, phy->phy); | |
731 | } | |
732 | } | |
733 | child->linkrate = min(parent_phy->linkrate, child->max_linkrate); | |
734 | child->pathways = min(child->pathways, parent->pathways); | |
735 | } | |
736 | ||
737 | static struct domain_device *sas_ex_discover_end_dev( | |
738 | struct domain_device *parent, int phy_id) | |
739 | { | |
740 | struct expander_device *parent_ex = &parent->ex_dev; | |
741 | struct ex_phy *phy = &parent_ex->ex_phy[phy_id]; | |
742 | struct domain_device *child = NULL; | |
743 | struct sas_rphy *rphy; | |
744 | int res; | |
745 | ||
746 | if (phy->attached_sata_host || phy->attached_sata_ps) | |
747 | return NULL; | |
748 | ||
735f7d2f | 749 | child = sas_alloc_device(); |
2908d778 JB |
750 | if (!child) |
751 | return NULL; | |
752 | ||
735f7d2f | 753 | kref_get(&parent->kref); |
2908d778 JB |
754 | child->parent = parent; |
755 | child->port = parent->port; | |
756 | child->iproto = phy->attached_iproto; | |
757 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
758 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); | |
024879ea JB |
759 | if (!phy->port) { |
760 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); | |
761 | if (unlikely(!phy->port)) | |
762 | goto out_err; | |
763 | if (unlikely(sas_port_add(phy->port) != 0)) { | |
764 | sas_port_free(phy->port); | |
765 | goto out_err; | |
766 | } | |
767 | } | |
2908d778 | 768 | sas_ex_get_linkrate(parent, child, phy); |
f41a0c44 | 769 | sas_device_set_phy(child, phy->port); |
2908d778 | 770 | |
b9142174 | 771 | #ifdef CONFIG_SCSI_SAS_ATA |
5929faf3 | 772 | if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) { |
354cf829 DW |
773 | res = sas_get_ata_info(child, phy); |
774 | if (res) | |
024879ea | 775 | goto out_free; |
1acce194 JB |
776 | |
777 | rphy = sas_end_device_alloc(phy->port); | |
528fd552 JB |
778 | if (unlikely(!rphy)) |
779 | goto out_free; | |
1acce194 | 780 | |
2908d778 | 781 | sas_init_dev(child); |
1acce194 JB |
782 | |
783 | child->rphy = rphy; | |
784 | ||
87c8331f | 785 | list_add_tail(&child->disco_list_node, &parent->port->disco_list); |
1acce194 | 786 | |
2908d778 JB |
787 | res = sas_discover_sata(child); |
788 | if (res) { | |
789 | SAS_DPRINTK("sas_discover_sata() for device %16llx at " | |
790 | "%016llx:0x%x returned 0x%x\n", | |
791 | SAS_ADDR(child->sas_addr), | |
792 | SAS_ADDR(parent->sas_addr), phy_id, res); | |
1acce194 | 793 | goto out_list_del; |
2908d778 | 794 | } |
b9142174 JB |
795 | } else |
796 | #endif | |
5929faf3 | 797 | if (phy->attached_tproto & SAS_PROTOCOL_SSP) { |
2908d778 JB |
798 | child->dev_type = SAS_END_DEV; |
799 | rphy = sas_end_device_alloc(phy->port); | |
800 | /* FIXME: error handling */ | |
024879ea JB |
801 | if (unlikely(!rphy)) |
802 | goto out_free; | |
2908d778 JB |
803 | child->tproto = phy->attached_tproto; |
804 | sas_init_dev(child); | |
805 | ||
806 | child->rphy = rphy; | |
807 | sas_fill_in_rphy(child, rphy); | |
808 | ||
9d720d82 | 809 | spin_lock_irq(&parent->port->dev_list_lock); |
2908d778 | 810 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
9d720d82 | 811 | spin_unlock_irq(&parent->port->dev_list_lock); |
2908d778 JB |
812 | |
813 | res = sas_discover_end_dev(child); | |
814 | if (res) { | |
815 | SAS_DPRINTK("sas_discover_end_dev() for device %16llx " | |
816 | "at %016llx:0x%x returned 0x%x\n", | |
817 | SAS_ADDR(child->sas_addr), | |
818 | SAS_ADDR(parent->sas_addr), phy_id, res); | |
024879ea | 819 | goto out_list_del; |
2908d778 JB |
820 | } |
821 | } else { | |
822 | SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n", | |
823 | phy->attached_tproto, SAS_ADDR(parent->sas_addr), | |
824 | phy_id); | |
b9142174 | 825 | goto out_free; |
2908d778 JB |
826 | } |
827 | ||
828 | list_add_tail(&child->siblings, &parent_ex->children); | |
829 | return child; | |
024879ea JB |
830 | |
831 | out_list_del: | |
6f63caae DW |
832 | sas_rphy_free(child->rphy); |
833 | child->rphy = NULL; | |
1a34c064 | 834 | |
87c8331f | 835 | list_del(&child->disco_list_node); |
1a34c064 | 836 | spin_lock_irq(&parent->port->dev_list_lock); |
024879ea | 837 | list_del(&child->dev_list_node); |
1a34c064 | 838 | spin_unlock_irq(&parent->port->dev_list_lock); |
024879ea JB |
839 | out_free: |
840 | sas_port_delete(phy->port); | |
841 | out_err: | |
842 | phy->port = NULL; | |
735f7d2f | 843 | sas_put_device(child); |
024879ea | 844 | return NULL; |
2908d778 JB |
845 | } |
846 | ||
423f7cf4 DW |
847 | /* See if this phy is part of a wide port */ |
848 | static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id) | |
849 | { | |
850 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; | |
851 | int i; | |
852 | ||
853 | for (i = 0; i < parent->ex_dev.num_phys; i++) { | |
854 | struct ex_phy *ephy = &parent->ex_dev.ex_phy[i]; | |
855 | ||
856 | if (ephy == phy) | |
857 | continue; | |
858 | ||
859 | if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr, | |
860 | SAS_ADDR_SIZE) && ephy->port) { | |
861 | sas_port_add_phy(ephy->port, phy->phy); | |
19252de6 | 862 | phy->port = ephy->port; |
423f7cf4 DW |
863 | phy->phy_state = PHY_DEVICE_DISCOVERED; |
864 | return 0; | |
865 | } | |
866 | } | |
867 | ||
868 | return -ENODEV; | |
869 | } | |
870 | ||
2908d778 JB |
871 | static struct domain_device *sas_ex_discover_expander( |
872 | struct domain_device *parent, int phy_id) | |
873 | { | |
874 | struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy); | |
875 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; | |
876 | struct domain_device *child = NULL; | |
877 | struct sas_rphy *rphy; | |
878 | struct sas_expander_device *edev; | |
879 | struct asd_sas_port *port; | |
880 | int res; | |
881 | ||
882 | if (phy->routing_attr == DIRECT_ROUTING) { | |
883 | SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not " | |
884 | "allowed\n", | |
885 | SAS_ADDR(parent->sas_addr), phy_id, | |
886 | SAS_ADDR(phy->attached_sas_addr), | |
887 | phy->attached_phy_id); | |
888 | return NULL; | |
889 | } | |
735f7d2f | 890 | child = sas_alloc_device(); |
2908d778 JB |
891 | if (!child) |
892 | return NULL; | |
893 | ||
894 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); | |
895 | /* FIXME: better error handling */ | |
896 | BUG_ON(sas_port_add(phy->port) != 0); | |
897 | ||
898 | ||
899 | switch (phy->attached_dev_type) { | |
900 | case EDGE_DEV: | |
901 | rphy = sas_expander_alloc(phy->port, | |
902 | SAS_EDGE_EXPANDER_DEVICE); | |
903 | break; | |
904 | case FANOUT_DEV: | |
905 | rphy = sas_expander_alloc(phy->port, | |
906 | SAS_FANOUT_EXPANDER_DEVICE); | |
907 | break; | |
908 | default: | |
909 | rphy = NULL; /* shut gcc up */ | |
910 | BUG(); | |
911 | } | |
912 | port = parent->port; | |
913 | child->rphy = rphy; | |
914 | edev = rphy_to_expander_device(rphy); | |
915 | child->dev_type = phy->attached_dev_type; | |
735f7d2f | 916 | kref_get(&parent->kref); |
2908d778 JB |
917 | child->parent = parent; |
918 | child->port = port; | |
919 | child->iproto = phy->attached_iproto; | |
920 | child->tproto = phy->attached_tproto; | |
921 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
922 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); | |
923 | sas_ex_get_linkrate(parent, child, phy); | |
924 | edev->level = parent_ex->level + 1; | |
925 | parent->port->disc.max_level = max(parent->port->disc.max_level, | |
926 | edev->level); | |
927 | sas_init_dev(child); | |
928 | sas_fill_in_rphy(child, rphy); | |
929 | sas_rphy_add(rphy); | |
930 | ||
9d720d82 | 931 | spin_lock_irq(&parent->port->dev_list_lock); |
2908d778 | 932 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
9d720d82 | 933 | spin_unlock_irq(&parent->port->dev_list_lock); |
2908d778 JB |
934 | |
935 | res = sas_discover_expander(child); | |
936 | if (res) { | |
5911e963 LT |
937 | spin_lock_irq(&parent->port->dev_list_lock); |
938 | list_del(&child->dev_list_node); | |
939 | spin_unlock_irq(&parent->port->dev_list_lock); | |
735f7d2f | 940 | sas_put_device(child); |
2908d778 JB |
941 | return NULL; |
942 | } | |
943 | list_add_tail(&child->siblings, &parent->ex_dev.children); | |
944 | return child; | |
945 | } | |
946 | ||
947 | static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) | |
948 | { | |
949 | struct expander_device *ex = &dev->ex_dev; | |
950 | struct ex_phy *ex_phy = &ex->ex_phy[phy_id]; | |
951 | struct domain_device *child = NULL; | |
952 | int res = 0; | |
953 | ||
954 | /* Phy state */ | |
88edf746 | 955 | if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) { |
a01e70e5 | 956 | if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL)) |
2908d778 JB |
957 | res = sas_ex_phy_discover(dev, phy_id); |
958 | if (res) | |
959 | return res; | |
960 | } | |
961 | ||
962 | /* Parent and domain coherency */ | |
963 | if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == | |
964 | SAS_ADDR(dev->port->sas_addr))) { | |
965 | sas_add_parent_port(dev, phy_id); | |
966 | return 0; | |
967 | } | |
968 | if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == | |
969 | SAS_ADDR(dev->parent->sas_addr))) { | |
970 | sas_add_parent_port(dev, phy_id); | |
971 | if (ex_phy->routing_attr == TABLE_ROUTING) | |
972 | sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1); | |
973 | return 0; | |
974 | } | |
975 | ||
976 | if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr)) | |
977 | sas_ex_disable_port(dev, ex_phy->attached_sas_addr); | |
978 | ||
979 | if (ex_phy->attached_dev_type == NO_DEVICE) { | |
980 | if (ex_phy->routing_attr == DIRECT_ROUTING) { | |
981 | memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE); | |
982 | sas_configure_routing(dev, ex_phy->attached_sas_addr); | |
983 | } | |
984 | return 0; | |
88edf746 | 985 | } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN) |
2908d778 JB |
986 | return 0; |
987 | ||
988 | if (ex_phy->attached_dev_type != SAS_END_DEV && | |
989 | ex_phy->attached_dev_type != FANOUT_DEV && | |
354cf829 DW |
990 | ex_phy->attached_dev_type != EDGE_DEV && |
991 | ex_phy->attached_dev_type != SATA_PENDING) { | |
2908d778 JB |
992 | SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx " |
993 | "phy 0x%x\n", 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, ex_phy->attached_sas_addr); | |
1000 | if (res) { | |
1001 | SAS_DPRINTK("configure routing for dev %016llx " | |
1002 | "reported 0x%x. Forgotten\n", | |
1003 | SAS_ADDR(ex_phy->attached_sas_addr), res); | |
1004 | sas_disable_routing(dev, ex_phy->attached_sas_addr); | |
1005 | return res; | |
1006 | } | |
1007 | ||
423f7cf4 DW |
1008 | res = sas_ex_join_wide_port(dev, phy_id); |
1009 | if (!res) { | |
1010 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", | |
1011 | phy_id, SAS_ADDR(ex_phy->attached_sas_addr)); | |
1012 | return res; | |
1013 | } | |
1014 | ||
2908d778 JB |
1015 | switch (ex_phy->attached_dev_type) { |
1016 | case SAS_END_DEV: | |
354cf829 | 1017 | case SATA_PENDING: |
2908d778 JB |
1018 | child = sas_ex_discover_end_dev(dev, phy_id); |
1019 | break; | |
1020 | case FANOUT_DEV: | |
1021 | if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) { | |
1022 | SAS_DPRINTK("second fanout expander %016llx phy 0x%x " | |
1023 | "attached to ex %016llx phy 0x%x\n", | |
1024 | SAS_ADDR(ex_phy->attached_sas_addr), | |
1025 | ex_phy->attached_phy_id, | |
1026 | SAS_ADDR(dev->sas_addr), | |
1027 | phy_id); | |
1028 | sas_ex_disable_phy(dev, phy_id); | |
1029 | break; | |
1030 | } else | |
1031 | memcpy(dev->port->disc.fanout_sas_addr, | |
1032 | ex_phy->attached_sas_addr, SAS_ADDR_SIZE); | |
1033 | /* fallthrough */ | |
1034 | case EDGE_DEV: | |
1035 | child = sas_ex_discover_expander(dev, phy_id); | |
1036 | break; | |
1037 | default: | |
1038 | break; | |
1039 | } | |
1040 | ||
1041 | if (child) { | |
1042 | int i; | |
1043 | ||
1044 | for (i = 0; i < ex->num_phys; i++) { | |
1045 | if (ex->ex_phy[i].phy_state == PHY_VACANT || | |
1046 | ex->ex_phy[i].phy_state == PHY_NOT_PRESENT) | |
1047 | continue; | |
19252de6 TP |
1048 | /* |
1049 | * Due to races, the phy might not get added to the | |
1050 | * wide port, so we add the phy to the wide port here. | |
1051 | */ | |
2908d778 | 1052 | if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) == |
19252de6 | 1053 | SAS_ADDR(child->sas_addr)) { |
2908d778 | 1054 | ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED; |
19252de6 TP |
1055 | res = sas_ex_join_wide_port(dev, i); |
1056 | if (!res) | |
1057 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", | |
1058 | i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr)); | |
1059 | ||
1060 | } | |
2908d778 JB |
1061 | } |
1062 | } | |
1063 | ||
1064 | return res; | |
1065 | } | |
1066 | ||
1067 | static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr) | |
1068 | { | |
1069 | struct expander_device *ex = &dev->ex_dev; | |
1070 | int i; | |
1071 | ||
1072 | for (i = 0; i < ex->num_phys; i++) { | |
1073 | struct ex_phy *phy = &ex->ex_phy[i]; | |
1074 | ||
1075 | if (phy->phy_state == PHY_VACANT || | |
1076 | phy->phy_state == PHY_NOT_PRESENT) | |
1077 | continue; | |
1078 | ||
1079 | if ((phy->attached_dev_type == EDGE_DEV || | |
1080 | phy->attached_dev_type == FANOUT_DEV) && | |
1081 | phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1082 | ||
1083 | memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE); | |
1084 | ||
1085 | return 1; | |
1086 | } | |
1087 | } | |
1088 | return 0; | |
1089 | } | |
1090 | ||
1091 | static int sas_check_level_subtractive_boundary(struct domain_device *dev) | |
1092 | { | |
1093 | struct expander_device *ex = &dev->ex_dev; | |
1094 | struct domain_device *child; | |
1095 | u8 sub_addr[8] = {0, }; | |
1096 | ||
1097 | list_for_each_entry(child, &ex->children, siblings) { | |
1098 | if (child->dev_type != EDGE_DEV && | |
1099 | child->dev_type != FANOUT_DEV) | |
1100 | continue; | |
1101 | if (sub_addr[0] == 0) { | |
1102 | sas_find_sub_addr(child, sub_addr); | |
1103 | continue; | |
1104 | } else { | |
1105 | u8 s2[8]; | |
1106 | ||
1107 | if (sas_find_sub_addr(child, s2) && | |
1108 | (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) { | |
1109 | ||
1110 | SAS_DPRINTK("ex %016llx->%016llx-?->%016llx " | |
1111 | "diverges from subtractive " | |
1112 | "boundary %016llx\n", | |
1113 | SAS_ADDR(dev->sas_addr), | |
1114 | SAS_ADDR(child->sas_addr), | |
1115 | SAS_ADDR(s2), | |
1116 | SAS_ADDR(sub_addr)); | |
1117 | ||
1118 | sas_ex_disable_port(child, s2); | |
1119 | } | |
1120 | } | |
1121 | } | |
1122 | return 0; | |
1123 | } | |
1124 | /** | |
1125 | * sas_ex_discover_devices -- discover devices attached to this expander | |
1126 | * dev: pointer to the expander domain device | |
1127 | * single: if you want to do a single phy, else set to -1; | |
1128 | * | |
1129 | * Configure this expander for use with its devices and register the | |
1130 | * devices of this expander. | |
1131 | */ | |
1132 | static int sas_ex_discover_devices(struct domain_device *dev, int single) | |
1133 | { | |
1134 | struct expander_device *ex = &dev->ex_dev; | |
1135 | int i = 0, end = ex->num_phys; | |
1136 | int res = 0; | |
1137 | ||
1138 | if (0 <= single && single < end) { | |
1139 | i = single; | |
1140 | end = i+1; | |
1141 | } | |
1142 | ||
1143 | for ( ; i < end; i++) { | |
1144 | struct ex_phy *ex_phy = &ex->ex_phy[i]; | |
1145 | ||
1146 | if (ex_phy->phy_state == PHY_VACANT || | |
1147 | ex_phy->phy_state == PHY_NOT_PRESENT || | |
1148 | ex_phy->phy_state == PHY_DEVICE_DISCOVERED) | |
1149 | continue; | |
1150 | ||
1151 | switch (ex_phy->linkrate) { | |
88edf746 JB |
1152 | case SAS_PHY_DISABLED: |
1153 | case SAS_PHY_RESET_PROBLEM: | |
1154 | case SAS_SATA_PORT_SELECTOR: | |
2908d778 JB |
1155 | continue; |
1156 | default: | |
1157 | res = sas_ex_discover_dev(dev, i); | |
1158 | if (res) | |
1159 | break; | |
1160 | continue; | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | if (!res) | |
1165 | sas_check_level_subtractive_boundary(dev); | |
1166 | ||
1167 | return res; | |
1168 | } | |
1169 | ||
1170 | static int sas_check_ex_subtractive_boundary(struct domain_device *dev) | |
1171 | { | |
1172 | struct expander_device *ex = &dev->ex_dev; | |
1173 | int i; | |
1174 | u8 *sub_sas_addr = NULL; | |
1175 | ||
1176 | if (dev->dev_type != EDGE_DEV) | |
1177 | return 0; | |
1178 | ||
1179 | for (i = 0; i < ex->num_phys; i++) { | |
1180 | struct ex_phy *phy = &ex->ex_phy[i]; | |
1181 | ||
1182 | if (phy->phy_state == PHY_VACANT || | |
1183 | phy->phy_state == PHY_NOT_PRESENT) | |
1184 | continue; | |
1185 | ||
1186 | if ((phy->attached_dev_type == FANOUT_DEV || | |
1187 | phy->attached_dev_type == EDGE_DEV) && | |
1188 | phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1189 | ||
1190 | if (!sub_sas_addr) | |
1191 | sub_sas_addr = &phy->attached_sas_addr[0]; | |
1192 | else if (SAS_ADDR(sub_sas_addr) != | |
1193 | SAS_ADDR(phy->attached_sas_addr)) { | |
1194 | ||
1195 | SAS_DPRINTK("ex %016llx phy 0x%x " | |
1196 | "diverges(%016llx) on subtractive " | |
1197 | "boundary(%016llx). Disabled\n", | |
1198 | SAS_ADDR(dev->sas_addr), i, | |
1199 | SAS_ADDR(phy->attached_sas_addr), | |
1200 | SAS_ADDR(sub_sas_addr)); | |
1201 | sas_ex_disable_phy(dev, i); | |
1202 | } | |
1203 | } | |
1204 | } | |
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | static void sas_print_parent_topology_bug(struct domain_device *child, | |
1209 | struct ex_phy *parent_phy, | |
1210 | struct ex_phy *child_phy) | |
1211 | { | |
2908d778 JB |
1212 | static const char *ex_type[] = { |
1213 | [EDGE_DEV] = "edge", | |
1214 | [FANOUT_DEV] = "fanout", | |
1215 | }; | |
1216 | struct domain_device *parent = child->parent; | |
1217 | ||
d214d81e DW |
1218 | sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx " |
1219 | "phy 0x%x has %c:%c routing link!\n", | |
2908d778 JB |
1220 | |
1221 | ex_type[parent->dev_type], | |
1222 | SAS_ADDR(parent->sas_addr), | |
1223 | parent_phy->phy_id, | |
1224 | ||
1225 | ex_type[child->dev_type], | |
1226 | SAS_ADDR(child->sas_addr), | |
1227 | child_phy->phy_id, | |
1228 | ||
d214d81e DW |
1229 | sas_route_char(parent, parent_phy), |
1230 | sas_route_char(child, child_phy)); | |
2908d778 JB |
1231 | } |
1232 | ||
1233 | static int sas_check_eeds(struct domain_device *child, | |
1234 | struct ex_phy *parent_phy, | |
1235 | struct ex_phy *child_phy) | |
1236 | { | |
1237 | int res = 0; | |
1238 | struct domain_device *parent = child->parent; | |
1239 | ||
1240 | if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) { | |
1241 | res = -ENODEV; | |
1242 | SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx " | |
1243 | "phy S:0x%x, while there is a fanout ex %016llx\n", | |
1244 | SAS_ADDR(parent->sas_addr), | |
1245 | parent_phy->phy_id, | |
1246 | SAS_ADDR(child->sas_addr), | |
1247 | child_phy->phy_id, | |
1248 | SAS_ADDR(parent->port->disc.fanout_sas_addr)); | |
1249 | } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) { | |
1250 | memcpy(parent->port->disc.eeds_a, parent->sas_addr, | |
1251 | SAS_ADDR_SIZE); | |
1252 | memcpy(parent->port->disc.eeds_b, child->sas_addr, | |
1253 | SAS_ADDR_SIZE); | |
1254 | } else if (((SAS_ADDR(parent->port->disc.eeds_a) == | |
1255 | SAS_ADDR(parent->sas_addr)) || | |
1256 | (SAS_ADDR(parent->port->disc.eeds_a) == | |
1257 | SAS_ADDR(child->sas_addr))) | |
1258 | && | |
1259 | ((SAS_ADDR(parent->port->disc.eeds_b) == | |
1260 | SAS_ADDR(parent->sas_addr)) || | |
1261 | (SAS_ADDR(parent->port->disc.eeds_b) == | |
1262 | SAS_ADDR(child->sas_addr)))) | |
1263 | ; | |
1264 | else { | |
1265 | res = -ENODEV; | |
1266 | SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx " | |
1267 | "phy 0x%x link forms a third EEDS!\n", | |
1268 | SAS_ADDR(parent->sas_addr), | |
1269 | parent_phy->phy_id, | |
1270 | SAS_ADDR(child->sas_addr), | |
1271 | child_phy->phy_id); | |
1272 | } | |
1273 | ||
1274 | return res; | |
1275 | } | |
1276 | ||
1277 | /* Here we spill over 80 columns. It is intentional. | |
1278 | */ | |
1279 | static int sas_check_parent_topology(struct domain_device *child) | |
1280 | { | |
1281 | struct expander_device *child_ex = &child->ex_dev; | |
1282 | struct expander_device *parent_ex; | |
1283 | int i; | |
1284 | int res = 0; | |
1285 | ||
1286 | if (!child->parent) | |
1287 | return 0; | |
1288 | ||
1289 | if (child->parent->dev_type != EDGE_DEV && | |
1290 | child->parent->dev_type != FANOUT_DEV) | |
1291 | return 0; | |
1292 | ||
1293 | parent_ex = &child->parent->ex_dev; | |
1294 | ||
1295 | for (i = 0; i < parent_ex->num_phys; i++) { | |
1296 | struct ex_phy *parent_phy = &parent_ex->ex_phy[i]; | |
1297 | struct ex_phy *child_phy; | |
1298 | ||
1299 | if (parent_phy->phy_state == PHY_VACANT || | |
1300 | parent_phy->phy_state == PHY_NOT_PRESENT) | |
1301 | continue; | |
1302 | ||
1303 | if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr)) | |
1304 | continue; | |
1305 | ||
1306 | child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; | |
1307 | ||
1308 | switch (child->parent->dev_type) { | |
1309 | case EDGE_DEV: | |
1310 | if (child->dev_type == FANOUT_DEV) { | |
1311 | if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || | |
1312 | child_phy->routing_attr != TABLE_ROUTING) { | |
1313 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1314 | res = -ENODEV; | |
1315 | } | |
1316 | } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1317 | if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1318 | res = sas_check_eeds(child, parent_phy, child_phy); | |
1319 | } else if (child_phy->routing_attr != TABLE_ROUTING) { | |
1320 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1321 | res = -ENODEV; | |
1322 | } | |
ffaac8f4 LT |
1323 | } else if (parent_phy->routing_attr == TABLE_ROUTING) { |
1324 | if (child_phy->routing_attr == SUBTRACTIVE_ROUTING || | |
1325 | (child_phy->routing_attr == TABLE_ROUTING && | |
1326 | child_ex->t2t_supp && parent_ex->t2t_supp)) { | |
1327 | /* All good */; | |
1328 | } else { | |
1329 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1330 | res = -ENODEV; | |
1331 | } | |
2908d778 JB |
1332 | } |
1333 | break; | |
1334 | case FANOUT_DEV: | |
1335 | if (parent_phy->routing_attr != TABLE_ROUTING || | |
1336 | child_phy->routing_attr != SUBTRACTIVE_ROUTING) { | |
1337 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1338 | res = -ENODEV; | |
1339 | } | |
1340 | break; | |
1341 | default: | |
1342 | break; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | return res; | |
1347 | } | |
1348 | ||
1349 | #define RRI_REQ_SIZE 16 | |
1350 | #define RRI_RESP_SIZE 44 | |
1351 | ||
1352 | static int sas_configure_present(struct domain_device *dev, int phy_id, | |
1353 | u8 *sas_addr, int *index, int *present) | |
1354 | { | |
1355 | int i, res = 0; | |
1356 | struct expander_device *ex = &dev->ex_dev; | |
1357 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
1358 | u8 *rri_req; | |
1359 | u8 *rri_resp; | |
1360 | ||
1361 | *present = 0; | |
1362 | *index = 0; | |
1363 | ||
1364 | rri_req = alloc_smp_req(RRI_REQ_SIZE); | |
1365 | if (!rri_req) | |
1366 | return -ENOMEM; | |
1367 | ||
1368 | rri_resp = alloc_smp_resp(RRI_RESP_SIZE); | |
1369 | if (!rri_resp) { | |
1370 | kfree(rri_req); | |
1371 | return -ENOMEM; | |
1372 | } | |
1373 | ||
1374 | rri_req[1] = SMP_REPORT_ROUTE_INFO; | |
1375 | rri_req[9] = phy_id; | |
1376 | ||
1377 | for (i = 0; i < ex->max_route_indexes ; i++) { | |
1378 | *(__be16 *)(rri_req+6) = cpu_to_be16(i); | |
1379 | res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp, | |
1380 | RRI_RESP_SIZE); | |
1381 | if (res) | |
1382 | goto out; | |
1383 | res = rri_resp[2]; | |
1384 | if (res == SMP_RESP_NO_INDEX) { | |
1385 | SAS_DPRINTK("overflow of indexes: dev %016llx " | |
1386 | "phy 0x%x index 0x%x\n", | |
1387 | SAS_ADDR(dev->sas_addr), phy_id, i); | |
1388 | goto out; | |
1389 | } else if (res != SMP_RESP_FUNC_ACC) { | |
1390 | SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x " | |
cadbd4a5 | 1391 | "result 0x%x\n", __func__, |
2908d778 JB |
1392 | SAS_ADDR(dev->sas_addr), phy_id, i, res); |
1393 | goto out; | |
1394 | } | |
1395 | if (SAS_ADDR(sas_addr) != 0) { | |
1396 | if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) { | |
1397 | *index = i; | |
1398 | if ((rri_resp[12] & 0x80) == 0x80) | |
1399 | *present = 0; | |
1400 | else | |
1401 | *present = 1; | |
1402 | goto out; | |
1403 | } else if (SAS_ADDR(rri_resp+16) == 0) { | |
1404 | *index = i; | |
1405 | *present = 0; | |
1406 | goto out; | |
1407 | } | |
1408 | } else if (SAS_ADDR(rri_resp+16) == 0 && | |
1409 | phy->last_da_index < i) { | |
1410 | phy->last_da_index = i; | |
1411 | *index = i; | |
1412 | *present = 0; | |
1413 | goto out; | |
1414 | } | |
1415 | } | |
1416 | res = -1; | |
1417 | out: | |
1418 | kfree(rri_req); | |
1419 | kfree(rri_resp); | |
1420 | return res; | |
1421 | } | |
1422 | ||
1423 | #define CRI_REQ_SIZE 44 | |
1424 | #define CRI_RESP_SIZE 8 | |
1425 | ||
1426 | static int sas_configure_set(struct domain_device *dev, int phy_id, | |
1427 | u8 *sas_addr, int index, int include) | |
1428 | { | |
1429 | int res; | |
1430 | u8 *cri_req; | |
1431 | u8 *cri_resp; | |
1432 | ||
1433 | cri_req = alloc_smp_req(CRI_REQ_SIZE); | |
1434 | if (!cri_req) | |
1435 | return -ENOMEM; | |
1436 | ||
1437 | cri_resp = alloc_smp_resp(CRI_RESP_SIZE); | |
1438 | if (!cri_resp) { | |
1439 | kfree(cri_req); | |
1440 | return -ENOMEM; | |
1441 | } | |
1442 | ||
1443 | cri_req[1] = SMP_CONF_ROUTE_INFO; | |
1444 | *(__be16 *)(cri_req+6) = cpu_to_be16(index); | |
1445 | cri_req[9] = phy_id; | |
1446 | if (SAS_ADDR(sas_addr) == 0 || !include) | |
1447 | cri_req[12] |= 0x80; | |
1448 | memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE); | |
1449 | ||
1450 | res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp, | |
1451 | CRI_RESP_SIZE); | |
1452 | if (res) | |
1453 | goto out; | |
1454 | res = cri_resp[2]; | |
1455 | if (res == SMP_RESP_NO_INDEX) { | |
1456 | SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x " | |
1457 | "index 0x%x\n", | |
1458 | SAS_ADDR(dev->sas_addr), phy_id, index); | |
1459 | } | |
1460 | out: | |
1461 | kfree(cri_req); | |
1462 | kfree(cri_resp); | |
1463 | return res; | |
1464 | } | |
1465 | ||
1466 | static int sas_configure_phy(struct domain_device *dev, int phy_id, | |
1467 | u8 *sas_addr, int include) | |
1468 | { | |
1469 | int index; | |
1470 | int present; | |
1471 | int res; | |
1472 | ||
1473 | res = sas_configure_present(dev, phy_id, sas_addr, &index, &present); | |
1474 | if (res) | |
1475 | return res; | |
1476 | if (include ^ present) | |
1477 | return sas_configure_set(dev, phy_id, sas_addr, index,include); | |
1478 | ||
1479 | return res; | |
1480 | } | |
1481 | ||
1482 | /** | |
1483 | * sas_configure_parent -- configure routing table of parent | |
1484 | * parent: parent expander | |
1485 | * child: child expander | |
1486 | * sas_addr: SAS port identifier of device directly attached to child | |
1487 | */ | |
1488 | static int sas_configure_parent(struct domain_device *parent, | |
1489 | struct domain_device *child, | |
1490 | u8 *sas_addr, int include) | |
1491 | { | |
1492 | struct expander_device *ex_parent = &parent->ex_dev; | |
1493 | int res = 0; | |
1494 | int i; | |
1495 | ||
1496 | if (parent->parent) { | |
1497 | res = sas_configure_parent(parent->parent, parent, sas_addr, | |
1498 | include); | |
1499 | if (res) | |
1500 | return res; | |
1501 | } | |
1502 | ||
1503 | if (ex_parent->conf_route_table == 0) { | |
1504 | SAS_DPRINTK("ex %016llx has self-configuring routing table\n", | |
1505 | SAS_ADDR(parent->sas_addr)); | |
1506 | return 0; | |
1507 | } | |
1508 | ||
1509 | for (i = 0; i < ex_parent->num_phys; i++) { | |
1510 | struct ex_phy *phy = &ex_parent->ex_phy[i]; | |
1511 | ||
1512 | if ((phy->routing_attr == TABLE_ROUTING) && | |
1513 | (SAS_ADDR(phy->attached_sas_addr) == | |
1514 | SAS_ADDR(child->sas_addr))) { | |
1515 | res = sas_configure_phy(parent, i, sas_addr, include); | |
1516 | if (res) | |
1517 | return res; | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | return res; | |
1522 | } | |
1523 | ||
1524 | /** | |
1525 | * sas_configure_routing -- configure routing | |
1526 | * dev: expander device | |
1527 | * sas_addr: port identifier of device directly attached to the expander device | |
1528 | */ | |
1529 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr) | |
1530 | { | |
1531 | if (dev->parent) | |
1532 | return sas_configure_parent(dev->parent, dev, sas_addr, 1); | |
1533 | return 0; | |
1534 | } | |
1535 | ||
1536 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr) | |
1537 | { | |
1538 | if (dev->parent) | |
1539 | return sas_configure_parent(dev->parent, dev, sas_addr, 0); | |
1540 | return 0; | |
1541 | } | |
1542 | ||
2908d778 JB |
1543 | /** |
1544 | * sas_discover_expander -- expander discovery | |
1545 | * @ex: pointer to expander domain device | |
1546 | * | |
1547 | * See comment in sas_discover_sata(). | |
1548 | */ | |
1549 | static int sas_discover_expander(struct domain_device *dev) | |
1550 | { | |
1551 | int res; | |
1552 | ||
1553 | res = sas_notify_lldd_dev_found(dev); | |
1554 | if (res) | |
1555 | return res; | |
1556 | ||
1557 | res = sas_ex_general(dev); | |
1558 | if (res) | |
1559 | goto out_err; | |
1560 | res = sas_ex_manuf_info(dev); | |
1561 | if (res) | |
1562 | goto out_err; | |
1563 | ||
1564 | res = sas_expander_discover(dev); | |
1565 | if (res) { | |
1566 | SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n", | |
1567 | SAS_ADDR(dev->sas_addr), res); | |
1568 | goto out_err; | |
1569 | } | |
1570 | ||
1571 | sas_check_ex_subtractive_boundary(dev); | |
1572 | res = sas_check_parent_topology(dev); | |
1573 | if (res) | |
1574 | goto out_err; | |
1575 | return 0; | |
1576 | out_err: | |
1577 | sas_notify_lldd_dev_gone(dev); | |
1578 | return res; | |
1579 | } | |
1580 | ||
1581 | static int sas_ex_level_discovery(struct asd_sas_port *port, const int level) | |
1582 | { | |
1583 | int res = 0; | |
1584 | struct domain_device *dev; | |
1585 | ||
1586 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
1587 | if (dev->dev_type == EDGE_DEV || | |
1588 | dev->dev_type == FANOUT_DEV) { | |
1589 | struct sas_expander_device *ex = | |
1590 | rphy_to_expander_device(dev->rphy); | |
1591 | ||
1592 | if (level == ex->level) | |
1593 | res = sas_ex_discover_devices(dev, -1); | |
1594 | else if (level > 0) | |
1595 | res = sas_ex_discover_devices(port->port_dev, -1); | |
1596 | ||
1597 | } | |
1598 | } | |
1599 | ||
1600 | return res; | |
1601 | } | |
1602 | ||
1603 | static int sas_ex_bfs_disc(struct asd_sas_port *port) | |
1604 | { | |
1605 | int res; | |
1606 | int level; | |
1607 | ||
1608 | do { | |
1609 | level = port->disc.max_level; | |
1610 | res = sas_ex_level_discovery(port, level); | |
1611 | mb(); | |
1612 | } while (level < port->disc.max_level); | |
1613 | ||
1614 | return res; | |
1615 | } | |
1616 | ||
1617 | int sas_discover_root_expander(struct domain_device *dev) | |
1618 | { | |
1619 | int res; | |
1620 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); | |
1621 | ||
bf451207 DW |
1622 | res = sas_rphy_add(dev->rphy); |
1623 | if (res) | |
1624 | goto out_err; | |
2908d778 JB |
1625 | |
1626 | ex->level = dev->port->disc.max_level; /* 0 */ | |
1627 | res = sas_discover_expander(dev); | |
bf451207 DW |
1628 | if (res) |
1629 | goto out_err2; | |
1630 | ||
1631 | sas_ex_bfs_disc(dev->port); | |
2908d778 JB |
1632 | |
1633 | return res; | |
bf451207 DW |
1634 | |
1635 | out_err2: | |
6f63caae | 1636 | sas_rphy_remove(dev->rphy); |
bf451207 | 1637 | out_err: |
bf451207 | 1638 | return res; |
2908d778 JB |
1639 | } |
1640 | ||
1641 | /* ---------- Domain revalidation ---------- */ | |
1642 | ||
1643 | static int sas_get_phy_discover(struct domain_device *dev, | |
1644 | int phy_id, struct smp_resp *disc_resp) | |
1645 | { | |
1646 | int res; | |
1647 | u8 *disc_req; | |
1648 | ||
1649 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); | |
1650 | if (!disc_req) | |
1651 | return -ENOMEM; | |
1652 | ||
1653 | disc_req[1] = SMP_DISCOVER; | |
1654 | disc_req[9] = phy_id; | |
1655 | ||
1656 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, | |
1657 | disc_resp, DISCOVER_RESP_SIZE); | |
1658 | if (res) | |
1659 | goto out; | |
1660 | else if (disc_resp->result != SMP_RESP_FUNC_ACC) { | |
1661 | res = disc_resp->result; | |
1662 | goto out; | |
1663 | } | |
1664 | out: | |
1665 | kfree(disc_req); | |
1666 | return res; | |
1667 | } | |
1668 | ||
1669 | static int sas_get_phy_change_count(struct domain_device *dev, | |
1670 | int phy_id, int *pcc) | |
1671 | { | |
1672 | int res; | |
1673 | struct smp_resp *disc_resp; | |
1674 | ||
1675 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); | |
1676 | if (!disc_resp) | |
1677 | return -ENOMEM; | |
1678 | ||
1679 | res = sas_get_phy_discover(dev, phy_id, disc_resp); | |
1680 | if (!res) | |
1681 | *pcc = disc_resp->disc.change_count; | |
1682 | ||
1683 | kfree(disc_resp); | |
1684 | return res; | |
1685 | } | |
1686 | ||
354cf829 DW |
1687 | static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id, |
1688 | u8 *sas_addr, enum sas_dev_type *type) | |
2908d778 JB |
1689 | { |
1690 | int res; | |
1691 | struct smp_resp *disc_resp; | |
1692 | struct discover_resp *dr; | |
1693 | ||
1694 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); | |
1695 | if (!disc_resp) | |
1696 | return -ENOMEM; | |
1697 | dr = &disc_resp->disc; | |
1698 | ||
1699 | res = sas_get_phy_discover(dev, phy_id, disc_resp); | |
354cf829 DW |
1700 | if (res == 0) { |
1701 | memcpy(sas_addr, disc_resp->disc.attached_sas_addr, 8); | |
1702 | *type = to_dev_type(dr); | |
1703 | if (*type == 0) | |
1704 | memset(sas_addr, 0, 8); | |
2908d778 JB |
1705 | } |
1706 | kfree(disc_resp); | |
1707 | return res; | |
1708 | } | |
1709 | ||
1710 | static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id, | |
19252de6 | 1711 | int from_phy, bool update) |
2908d778 JB |
1712 | { |
1713 | struct expander_device *ex = &dev->ex_dev; | |
1714 | int res = 0; | |
1715 | int i; | |
1716 | ||
1717 | for (i = from_phy; i < ex->num_phys; i++) { | |
1718 | int phy_change_count = 0; | |
1719 | ||
1720 | res = sas_get_phy_change_count(dev, i, &phy_change_count); | |
1721 | if (res) | |
1722 | goto out; | |
1723 | else if (phy_change_count != ex->ex_phy[i].phy_change_count) { | |
19252de6 TP |
1724 | if (update) |
1725 | ex->ex_phy[i].phy_change_count = | |
1726 | phy_change_count; | |
2908d778 JB |
1727 | *phy_id = i; |
1728 | return 0; | |
1729 | } | |
1730 | } | |
1731 | out: | |
1732 | return res; | |
1733 | } | |
1734 | ||
1735 | static int sas_get_ex_change_count(struct domain_device *dev, int *ecc) | |
1736 | { | |
1737 | int res; | |
1738 | u8 *rg_req; | |
1739 | struct smp_resp *rg_resp; | |
1740 | ||
1741 | rg_req = alloc_smp_req(RG_REQ_SIZE); | |
1742 | if (!rg_req) | |
1743 | return -ENOMEM; | |
1744 | ||
1745 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); | |
1746 | if (!rg_resp) { | |
1747 | kfree(rg_req); | |
1748 | return -ENOMEM; | |
1749 | } | |
1750 | ||
1751 | rg_req[1] = SMP_REPORT_GENERAL; | |
1752 | ||
1753 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, | |
1754 | RG_RESP_SIZE); | |
1755 | if (res) | |
1756 | goto out; | |
1757 | if (rg_resp->result != SMP_RESP_FUNC_ACC) { | |
1758 | res = rg_resp->result; | |
1759 | goto out; | |
1760 | } | |
1761 | ||
1762 | *ecc = be16_to_cpu(rg_resp->rg.change_count); | |
1763 | out: | |
1764 | kfree(rg_resp); | |
1765 | kfree(rg_req); | |
1766 | return res; | |
1767 | } | |
19252de6 TP |
1768 | /** |
1769 | * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE). | |
1770 | * @dev:domain device to be detect. | |
1771 | * @src_dev: the device which originated BROADCAST(CHANGE). | |
1772 | * | |
1773 | * Add self-configuration expander suport. Suppose two expander cascading, | |
1774 | * when the first level expander is self-configuring, hotplug the disks in | |
1775 | * second level expander, BROADCAST(CHANGE) will not only be originated | |
1776 | * in the second level expander, but also be originated in the first level | |
1777 | * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say, | |
1778 | * expander changed count in two level expanders will all increment at least | |
1779 | * once, but the phy which chang count has changed is the source device which | |
1780 | * we concerned. | |
1781 | */ | |
2908d778 JB |
1782 | |
1783 | static int sas_find_bcast_dev(struct domain_device *dev, | |
1784 | struct domain_device **src_dev) | |
1785 | { | |
1786 | struct expander_device *ex = &dev->ex_dev; | |
1787 | int ex_change_count = -1; | |
19252de6 | 1788 | int phy_id = -1; |
2908d778 | 1789 | int res; |
19252de6 | 1790 | struct domain_device *ch; |
2908d778 JB |
1791 | |
1792 | res = sas_get_ex_change_count(dev, &ex_change_count); | |
1793 | if (res) | |
1794 | goto out; | |
19252de6 TP |
1795 | if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) { |
1796 | /* Just detect if this expander phys phy change count changed, | |
1797 | * in order to determine if this expander originate BROADCAST, | |
1798 | * and do not update phy change count field in our structure. | |
1799 | */ | |
1800 | res = sas_find_bcast_phy(dev, &phy_id, 0, false); | |
1801 | if (phy_id != -1) { | |
1802 | *src_dev = dev; | |
1803 | ex->ex_change_count = ex_change_count; | |
1804 | SAS_DPRINTK("Expander phy change count has changed\n"); | |
1805 | return res; | |
1806 | } else | |
1807 | SAS_DPRINTK("Expander phys DID NOT change\n"); | |
1808 | } | |
1809 | list_for_each_entry(ch, &ex->children, siblings) { | |
1810 | if (ch->dev_type == EDGE_DEV || ch->dev_type == FANOUT_DEV) { | |
1811 | res = sas_find_bcast_dev(ch, src_dev); | |
24926dad | 1812 | if (*src_dev) |
19252de6 | 1813 | return res; |
2908d778 JB |
1814 | } |
1815 | } | |
1816 | out: | |
1817 | return res; | |
1818 | } | |
1819 | ||
1a34c064 | 1820 | static void sas_unregister_ex_tree(struct asd_sas_port *port, struct domain_device *dev) |
2908d778 JB |
1821 | { |
1822 | struct expander_device *ex = &dev->ex_dev; | |
1823 | struct domain_device *child, *n; | |
1824 | ||
1825 | list_for_each_entry_safe(child, n, &ex->children, siblings) { | |
e139942d | 1826 | set_bit(SAS_DEV_GONE, &child->state); |
2908d778 JB |
1827 | if (child->dev_type == EDGE_DEV || |
1828 | child->dev_type == FANOUT_DEV) | |
1a34c064 | 1829 | sas_unregister_ex_tree(port, child); |
2908d778 | 1830 | else |
1a34c064 | 1831 | sas_unregister_dev(port, child); |
2908d778 | 1832 | } |
1a34c064 | 1833 | sas_unregister_dev(port, dev); |
2908d778 JB |
1834 | } |
1835 | ||
1836 | static void sas_unregister_devs_sas_addr(struct domain_device *parent, | |
19252de6 | 1837 | int phy_id, bool last) |
2908d778 JB |
1838 | { |
1839 | struct expander_device *ex_dev = &parent->ex_dev; | |
1840 | struct ex_phy *phy = &ex_dev->ex_phy[phy_id]; | |
f41a0c44 | 1841 | struct domain_device *child, *n, *found = NULL; |
19252de6 TP |
1842 | if (last) { |
1843 | list_for_each_entry_safe(child, n, | |
1844 | &ex_dev->children, siblings) { | |
1845 | if (SAS_ADDR(child->sas_addr) == | |
1846 | SAS_ADDR(phy->attached_sas_addr)) { | |
e139942d | 1847 | set_bit(SAS_DEV_GONE, &child->state); |
19252de6 TP |
1848 | if (child->dev_type == EDGE_DEV || |
1849 | child->dev_type == FANOUT_DEV) | |
1a34c064 | 1850 | sas_unregister_ex_tree(parent->port, child); |
19252de6 | 1851 | else |
1a34c064 | 1852 | sas_unregister_dev(parent->port, child); |
f41a0c44 | 1853 | found = child; |
19252de6 TP |
1854 | break; |
1855 | } | |
2908d778 | 1856 | } |
19252de6 | 1857 | sas_disable_routing(parent, phy->attached_sas_addr); |
2908d778 | 1858 | } |
2908d778 | 1859 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |
a73914c3 MS |
1860 | if (phy->port) { |
1861 | sas_port_delete_phy(phy->port, phy->phy); | |
f41a0c44 | 1862 | sas_device_set_phy(found, phy->port); |
a73914c3 MS |
1863 | if (phy->port->num_phys == 0) |
1864 | sas_port_delete(phy->port); | |
1865 | phy->port = NULL; | |
1866 | } | |
2908d778 JB |
1867 | } |
1868 | ||
1869 | static int sas_discover_bfs_by_root_level(struct domain_device *root, | |
1870 | const int level) | |
1871 | { | |
1872 | struct expander_device *ex_root = &root->ex_dev; | |
1873 | struct domain_device *child; | |
1874 | int res = 0; | |
1875 | ||
1876 | list_for_each_entry(child, &ex_root->children, siblings) { | |
1877 | if (child->dev_type == EDGE_DEV || | |
1878 | child->dev_type == FANOUT_DEV) { | |
1879 | struct sas_expander_device *ex = | |
1880 | rphy_to_expander_device(child->rphy); | |
1881 | ||
1882 | if (level > ex->level) | |
1883 | res = sas_discover_bfs_by_root_level(child, | |
1884 | level); | |
1885 | else if (level == ex->level) | |
1886 | res = sas_ex_discover_devices(child, -1); | |
1887 | } | |
1888 | } | |
1889 | return res; | |
1890 | } | |
1891 | ||
1892 | static int sas_discover_bfs_by_root(struct domain_device *dev) | |
1893 | { | |
1894 | int res; | |
1895 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); | |
1896 | int level = ex->level+1; | |
1897 | ||
1898 | res = sas_ex_discover_devices(dev, -1); | |
1899 | if (res) | |
1900 | goto out; | |
1901 | do { | |
1902 | res = sas_discover_bfs_by_root_level(dev, level); | |
1903 | mb(); | |
1904 | level += 1; | |
1905 | } while (level <= dev->port->disc.max_level); | |
1906 | out: | |
1907 | return res; | |
1908 | } | |
1909 | ||
1910 | static int sas_discover_new(struct domain_device *dev, int phy_id) | |
1911 | { | |
1912 | struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id]; | |
1913 | struct domain_device *child; | |
19252de6 TP |
1914 | bool found = false; |
1915 | int res, i; | |
2908d778 JB |
1916 | |
1917 | SAS_DPRINTK("ex %016llx phy%d new device attached\n", | |
1918 | SAS_ADDR(dev->sas_addr), phy_id); | |
1919 | res = sas_ex_phy_discover(dev, phy_id); | |
1920 | if (res) | |
1921 | goto out; | |
19252de6 TP |
1922 | /* to support the wide port inserted */ |
1923 | for (i = 0; i < dev->ex_dev.num_phys; i++) { | |
1924 | struct ex_phy *ex_phy_temp = &dev->ex_dev.ex_phy[i]; | |
1925 | if (i == phy_id) | |
1926 | continue; | |
1927 | if (SAS_ADDR(ex_phy_temp->attached_sas_addr) == | |
1928 | SAS_ADDR(ex_phy->attached_sas_addr)) { | |
1929 | found = true; | |
1930 | break; | |
1931 | } | |
1932 | } | |
1933 | if (found) { | |
1934 | sas_ex_join_wide_port(dev, phy_id); | |
1935 | return 0; | |
1936 | } | |
2908d778 | 1937 | res = sas_ex_discover_devices(dev, phy_id); |
19252de6 | 1938 | if (!res) |
2908d778 JB |
1939 | goto out; |
1940 | list_for_each_entry(child, &dev->ex_dev.children, siblings) { | |
1941 | if (SAS_ADDR(child->sas_addr) == | |
1942 | SAS_ADDR(ex_phy->attached_sas_addr)) { | |
1943 | if (child->dev_type == EDGE_DEV || | |
1944 | child->dev_type == FANOUT_DEV) | |
1945 | res = sas_discover_bfs_by_root(child); | |
1946 | break; | |
1947 | } | |
1948 | } | |
1949 | out: | |
1950 | return res; | |
1951 | } | |
1952 | ||
354cf829 DW |
1953 | static bool dev_type_flutter(enum sas_dev_type new, enum sas_dev_type old) |
1954 | { | |
1955 | if (old == new) | |
1956 | return true; | |
1957 | ||
1958 | /* treat device directed resets as flutter, if we went | |
1959 | * SAS_END_DEV to SATA_PENDING the link needs recovery | |
1960 | */ | |
1961 | if ((old == SATA_PENDING && new == SAS_END_DEV) || | |
1962 | (old == SAS_END_DEV && new == SATA_PENDING)) | |
1963 | return true; | |
1964 | ||
1965 | return false; | |
1966 | } | |
1967 | ||
19252de6 | 1968 | static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last) |
2908d778 JB |
1969 | { |
1970 | struct expander_device *ex = &dev->ex_dev; | |
1971 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
354cf829 DW |
1972 | enum sas_dev_type type = NO_DEVICE; |
1973 | u8 sas_addr[8]; | |
2908d778 JB |
1974 | int res; |
1975 | ||
354cf829 | 1976 | res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type); |
2908d778 JB |
1977 | switch (res) { |
1978 | case SMP_RESP_NO_PHY: | |
1979 | phy->phy_state = PHY_NOT_PRESENT; | |
19252de6 | 1980 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
354cf829 | 1981 | return res; |
2908d778 JB |
1982 | case SMP_RESP_PHY_VACANT: |
1983 | phy->phy_state = PHY_VACANT; | |
19252de6 | 1984 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
354cf829 | 1985 | return res; |
2908d778 JB |
1986 | case SMP_RESP_FUNC_ACC: |
1987 | break; | |
1988 | } | |
1989 | ||
354cf829 | 1990 | if (SAS_ADDR(sas_addr) == 0) { |
2908d778 | 1991 | phy->phy_state = PHY_EMPTY; |
19252de6 | 1992 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
354cf829 DW |
1993 | return res; |
1994 | } else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) && | |
1995 | dev_type_flutter(type, phy->attached_dev_type)) { | |
1996 | struct domain_device *ata_dev = sas_ex_to_ata(dev, phy_id); | |
1997 | char *action = ""; | |
1998 | ||
a01e70e5 | 1999 | sas_ex_phy_discover(dev, phy_id); |
354cf829 DW |
2000 | |
2001 | if (ata_dev && phy->attached_dev_type == SATA_PENDING) | |
2002 | action = ", needs recovery"; | |
2003 | SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter%s\n", | |
2004 | SAS_ADDR(dev->sas_addr), phy_id, action); | |
2005 | return res; | |
2006 | } | |
2007 | ||
2008 | return sas_discover_new(dev, phy_id); | |
2908d778 JB |
2009 | } |
2010 | ||
19252de6 TP |
2011 | /** |
2012 | * sas_rediscover - revalidate the domain. | |
2013 | * @dev:domain device to be detect. | |
2014 | * @phy_id: the phy id will be detected. | |
2015 | * | |
2016 | * NOTE: this process _must_ quit (return) as soon as any connection | |
2017 | * errors are encountered. Connection recovery is done elsewhere. | |
2018 | * Discover process only interrogates devices in order to discover the | |
2019 | * domain.For plugging out, we un-register the device only when it is | |
2020 | * the last phy in the port, for other phys in this port, we just delete it | |
2021 | * from the port.For inserting, we do discovery when it is the | |
2022 | * first phy,for other phys in this port, we add it to the port to | |
2023 | * forming the wide-port. | |
2024 | */ | |
2908d778 JB |
2025 | static int sas_rediscover(struct domain_device *dev, const int phy_id) |
2026 | { | |
2027 | struct expander_device *ex = &dev->ex_dev; | |
2028 | struct ex_phy *changed_phy = &ex->ex_phy[phy_id]; | |
2029 | int res = 0; | |
2030 | int i; | |
19252de6 | 2031 | bool last = true; /* is this the last phy of the port */ |
2908d778 JB |
2032 | |
2033 | SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n", | |
2034 | SAS_ADDR(dev->sas_addr), phy_id); | |
2035 | ||
2036 | if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) { | |
2037 | for (i = 0; i < ex->num_phys; i++) { | |
2038 | struct ex_phy *phy = &ex->ex_phy[i]; | |
2039 | ||
2040 | if (i == phy_id) | |
2041 | continue; | |
2042 | if (SAS_ADDR(phy->attached_sas_addr) == | |
2043 | SAS_ADDR(changed_phy->attached_sas_addr)) { | |
2044 | SAS_DPRINTK("phy%d part of wide port with " | |
2045 | "phy%d\n", phy_id, i); | |
19252de6 TP |
2046 | last = false; |
2047 | break; | |
2908d778 JB |
2048 | } |
2049 | } | |
19252de6 | 2050 | res = sas_rediscover_dev(dev, phy_id, last); |
2908d778 JB |
2051 | } else |
2052 | res = sas_discover_new(dev, phy_id); | |
2908d778 JB |
2053 | return res; |
2054 | } | |
2055 | ||
2056 | /** | |
2057 | * sas_revalidate_domain -- revalidate the domain | |
2058 | * @port: port to the domain of interest | |
2059 | * | |
2060 | * NOTE: this process _must_ quit (return) as soon as any connection | |
2061 | * errors are encountered. Connection recovery is done elsewhere. | |
2062 | * Discover process only interrogates devices in order to discover the | |
2063 | * domain. | |
2064 | */ | |
2065 | int sas_ex_revalidate_domain(struct domain_device *port_dev) | |
2066 | { | |
2067 | int res; | |
2068 | struct domain_device *dev = NULL; | |
2069 | ||
2070 | res = sas_find_bcast_dev(port_dev, &dev); | |
2071 | if (res) | |
2072 | goto out; | |
2073 | if (dev) { | |
2074 | struct expander_device *ex = &dev->ex_dev; | |
2075 | int i = 0, phy_id; | |
2076 | ||
2077 | do { | |
2078 | phy_id = -1; | |
19252de6 | 2079 | res = sas_find_bcast_phy(dev, &phy_id, i, true); |
2908d778 JB |
2080 | if (phy_id == -1) |
2081 | break; | |
2082 | res = sas_rediscover(dev, phy_id); | |
2083 | i = phy_id + 1; | |
2084 | } while (i < ex->num_phys); | |
2085 | } | |
2086 | out: | |
2087 | return res; | |
2088 | } | |
2089 | ||
ba1fc175 FT |
2090 | int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, |
2091 | struct request *req) | |
2092 | { | |
2093 | struct domain_device *dev; | |
2cd614c8 | 2094 | int ret, type; |
ba1fc175 FT |
2095 | struct request *rsp = req->next_rq; |
2096 | ||
2097 | if (!rsp) { | |
2098 | printk("%s: space for a smp response is missing\n", | |
cadbd4a5 | 2099 | __func__); |
ba1fc175 FT |
2100 | return -EINVAL; |
2101 | } | |
2102 | ||
2cd614c8 | 2103 | /* no rphy means no smp target support (ie aic94xx host) */ |
b98e66fa JB |
2104 | if (!rphy) |
2105 | return sas_smp_host_handler(shost, req, rsp); | |
2106 | ||
2cd614c8 | 2107 | type = rphy->identify.device_type; |
ba1fc175 FT |
2108 | |
2109 | if (type != SAS_EDGE_EXPANDER_DEVICE && | |
2110 | type != SAS_FANOUT_EXPANDER_DEVICE) { | |
2111 | printk("%s: can we send a smp request to a device?\n", | |
cadbd4a5 | 2112 | __func__); |
ba1fc175 FT |
2113 | return -EINVAL; |
2114 | } | |
2115 | ||
2116 | dev = sas_find_dev_by_rphy(rphy); | |
2117 | if (!dev) { | |
cadbd4a5 | 2118 | printk("%s: fail to find a domain_device?\n", __func__); |
ba1fc175 FT |
2119 | return -EINVAL; |
2120 | } | |
2121 | ||
2122 | /* do we need to support multiple segments? */ | |
2123 | if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) { | |
2124 | printk("%s: multiple segments req %u %u, rsp %u %u\n", | |
b0790410 TH |
2125 | __func__, req->bio->bi_vcnt, blk_rq_bytes(req), |
2126 | rsp->bio->bi_vcnt, blk_rq_bytes(rsp)); | |
ba1fc175 FT |
2127 | return -EINVAL; |
2128 | } | |
2129 | ||
b0790410 TH |
2130 | ret = smp_execute_task(dev, bio_data(req->bio), blk_rq_bytes(req), |
2131 | bio_data(rsp->bio), blk_rq_bytes(rsp)); | |
2d4b63e1 JB |
2132 | if (ret > 0) { |
2133 | /* positive number is the untransferred residual */ | |
c3a4d78c | 2134 | rsp->resid_len = ret; |
5f49f631 | 2135 | req->resid_len = 0; |
2d4b63e1 | 2136 | ret = 0; |
5f49f631 TH |
2137 | } else if (ret == 0) { |
2138 | rsp->resid_len = 0; | |
2139 | req->resid_len = 0; | |
2d4b63e1 | 2140 | } |
ba1fc175 FT |
2141 | |
2142 | return ret; | |
2143 | } |