Commit | Line | Data |
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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 | ||
f0bf750c | 54 | complete(&task->slow_task->completion); |
2908d778 JB |
55 | } |
56 | ||
57 | static void smp_task_done(struct sas_task *task) | |
58 | { | |
f0bf750c | 59 | if (!del_timer(&task->slow_task->timer)) |
2908d778 | 60 | return; |
f0bf750c | 61 | complete(&task->slow_task->completion); |
2908d778 JB |
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 | ||
f0bf750c | 82 | task = sas_alloc_slow_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 | |
f0bf750c DW |
94 | task->slow_task->timer.data = (unsigned long) task; |
95 | task->slow_task->timer.function = smp_task_timedout; | |
96 | task->slow_task->timer.expires = jiffies + SMP_TIMEOUT*HZ; | |
97 | add_timer(&task->slow_task->timer); | |
2908d778 | 98 | |
42961ee8 | 99 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); |
2908d778 | 100 | |
42961ee8 | 101 | if (res) { |
f0bf750c | 102 | del_timer(&task->slow_task->timer); |
42961ee8 | 103 | SAS_DPRINTK("executing SMP task failed:%d\n", res); |
89d3cf6a | 104 | break; |
2908d778 | 105 | } |
42961ee8 | 106 | |
f0bf750c | 107 | wait_for_completion(&task->slow_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; | |
0f3fce5c | 205 | struct sas_ha_struct *ha = dev->port->ha; |
2908d778 JB |
206 | struct expander_device *ex = &dev->ex_dev; |
207 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
2908d778 | 208 | struct sas_rphy *rphy = dev->rphy; |
d214d81e DW |
209 | bool new_phy = !phy->phy; |
210 | char *type; | |
2908d778 | 211 | |
d214d81e | 212 | if (new_phy) { |
0f3fce5c DW |
213 | if (WARN_ON_ONCE(test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state))) |
214 | return; | |
2908d778 JB |
215 | phy->phy = sas_phy_alloc(&rphy->dev, phy_id); |
216 | ||
217 | /* FIXME: error_handling */ | |
218 | BUG_ON(!phy->phy); | |
219 | } | |
220 | ||
221 | switch (resp->result) { | |
222 | case SMP_RESP_PHY_VACANT: | |
223 | phy->phy_state = PHY_VACANT; | |
2bc72c91 | 224 | break; |
2908d778 JB |
225 | default: |
226 | phy->phy_state = PHY_NOT_PRESENT; | |
2bc72c91 | 227 | break; |
2908d778 JB |
228 | case SMP_RESP_FUNC_ACC: |
229 | phy->phy_state = PHY_EMPTY; /* do not know yet */ | |
230 | break; | |
231 | } | |
232 | ||
354cf829 DW |
233 | /* check if anything important changed to squelch debug */ |
234 | dev_type = phy->attached_dev_type; | |
235 | linkrate = phy->linkrate; | |
236 | memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
237 | ||
238 | phy->attached_dev_type = to_dev_type(dr); | |
0f3fce5c DW |
239 | if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) |
240 | goto out; | |
2908d778 | 241 | phy->phy_id = phy_id; |
2908d778 JB |
242 | phy->linkrate = dr->linkrate; |
243 | phy->attached_sata_host = dr->attached_sata_host; | |
244 | phy->attached_sata_dev = dr->attached_sata_dev; | |
245 | phy->attached_sata_ps = dr->attached_sata_ps; | |
246 | phy->attached_iproto = dr->iproto << 1; | |
247 | phy->attached_tproto = dr->tproto << 1; | |
7d1d8651 DW |
248 | /* help some expanders that fail to zero sas_address in the 'no |
249 | * device' case | |
250 | */ | |
251 | if (phy->attached_dev_type == NO_DEVICE || | |
252 | phy->linkrate < SAS_LINK_RATE_1_5_GBPS) | |
253 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); | |
254 | else | |
255 | memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE); | |
2908d778 JB |
256 | phy->attached_phy_id = dr->attached_phy_id; |
257 | phy->phy_change_count = dr->change_count; | |
258 | phy->routing_attr = dr->routing_attr; | |
259 | phy->virtual = dr->virtual; | |
260 | phy->last_da_index = -1; | |
261 | ||
bb041a0e | 262 | phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr); |
354cf829 | 263 | phy->phy->identify.device_type = dr->attached_dev_type; |
2908d778 JB |
264 | phy->phy->identify.initiator_port_protocols = phy->attached_iproto; |
265 | phy->phy->identify.target_port_protocols = phy->attached_tproto; | |
77c309f3 DW |
266 | if (!phy->attached_tproto && dr->attached_sata_dev) |
267 | phy->phy->identify.target_port_protocols = SAS_PROTOCOL_SATA; | |
2908d778 | 268 | phy->phy->identify.phy_identifier = phy_id; |
a01e70e5 JB |
269 | phy->phy->minimum_linkrate_hw = dr->hmin_linkrate; |
270 | phy->phy->maximum_linkrate_hw = dr->hmax_linkrate; | |
271 | phy->phy->minimum_linkrate = dr->pmin_linkrate; | |
272 | phy->phy->maximum_linkrate = dr->pmax_linkrate; | |
88edf746 | 273 | phy->phy->negotiated_linkrate = phy->linkrate; |
2908d778 | 274 | |
d214d81e | 275 | if (new_phy) |
2bc72c91 JW |
276 | if (sas_phy_add(phy->phy)) { |
277 | sas_phy_free(phy->phy); | |
278 | return; | |
279 | } | |
2908d778 | 280 | |
0f3fce5c | 281 | out: |
d214d81e | 282 | switch (phy->attached_dev_type) { |
354cf829 DW |
283 | case SATA_PENDING: |
284 | type = "stp pending"; | |
285 | break; | |
d214d81e DW |
286 | case NO_DEVICE: |
287 | type = "no device"; | |
288 | break; | |
289 | case SAS_END_DEV: | |
290 | if (phy->attached_iproto) { | |
291 | if (phy->attached_tproto) | |
292 | type = "host+target"; | |
293 | else | |
294 | type = "host"; | |
295 | } else { | |
296 | if (dr->attached_sata_dev) | |
297 | type = "stp"; | |
298 | else | |
299 | type = "ssp"; | |
300 | } | |
301 | break; | |
302 | case EDGE_DEV: | |
303 | case FANOUT_DEV: | |
304 | type = "smp"; | |
305 | break; | |
306 | default: | |
307 | type = "unknown"; | |
308 | } | |
2908d778 | 309 | |
354cf829 DW |
310 | /* this routine is polled by libata error recovery so filter |
311 | * unimportant messages | |
312 | */ | |
313 | if (new_phy || phy->attached_dev_type != dev_type || | |
314 | phy->linkrate != linkrate || | |
315 | SAS_ADDR(phy->attached_sas_addr) != SAS_ADDR(sas_addr)) | |
316 | /* pass */; | |
317 | else | |
318 | return; | |
319 | ||
0f3fce5c DW |
320 | /* if the attached device type changed and ata_eh is active, |
321 | * make sure we run revalidation when eh completes (see: | |
322 | * sas_enable_revalidation) | |
323 | */ | |
324 | if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) | |
325 | set_bit(DISCE_REVALIDATE_DOMAIN, &dev->port->disc.pending); | |
326 | ||
327 | SAS_DPRINTK("%sex %016llx phy%02d:%c:%X attached: %016llx (%s)\n", | |
328 | test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state) ? "ata: " : "", | |
d214d81e DW |
329 | SAS_ADDR(dev->sas_addr), phy->phy_id, |
330 | sas_route_char(dev, phy), phy->linkrate, | |
331 | SAS_ADDR(phy->attached_sas_addr), type); | |
2908d778 JB |
332 | } |
333 | ||
b52df417 | 334 | /* check if we have an existing attached ata device on this expander phy */ |
81c757bc | 335 | struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id) |
b52df417 DW |
336 | { |
337 | struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id]; | |
338 | struct domain_device *dev; | |
339 | struct sas_rphy *rphy; | |
340 | ||
341 | if (!ex_phy->port) | |
342 | return NULL; | |
343 | ||
344 | rphy = ex_phy->port->rphy; | |
345 | if (!rphy) | |
346 | return NULL; | |
347 | ||
348 | dev = sas_find_dev_by_rphy(rphy); | |
349 | ||
350 | if (dev && dev_is_sata(dev)) | |
351 | return dev; | |
352 | ||
353 | return NULL; | |
354 | } | |
355 | ||
2908d778 JB |
356 | #define DISCOVER_REQ_SIZE 16 |
357 | #define DISCOVER_RESP_SIZE 56 | |
358 | ||
1acce194 JB |
359 | static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req, |
360 | u8 *disc_resp, int single) | |
361 | { | |
354cf829 DW |
362 | struct discover_resp *dr; |
363 | int res; | |
1acce194 JB |
364 | |
365 | disc_req[9] = single; | |
1acce194 | 366 | |
354cf829 DW |
367 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, |
368 | disc_resp, DISCOVER_RESP_SIZE); | |
369 | if (res) | |
370 | return res; | |
371 | dr = &((struct smp_resp *)disc_resp)->disc; | |
372 | if (memcmp(dev->sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE) == 0) { | |
373 | sas_printk("Found loopback topology, just ignore it!\n"); | |
374 | return 0; | |
1acce194 JB |
375 | } |
376 | sas_set_ex_phy(dev, single, disc_resp); | |
377 | return 0; | |
378 | } | |
379 | ||
354cf829 | 380 | int sas_ex_phy_discover(struct domain_device *dev, int single) |
2908d778 JB |
381 | { |
382 | struct expander_device *ex = &dev->ex_dev; | |
383 | int res = 0; | |
384 | u8 *disc_req; | |
385 | u8 *disc_resp; | |
386 | ||
387 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); | |
388 | if (!disc_req) | |
389 | return -ENOMEM; | |
390 | ||
391 | disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE); | |
392 | if (!disc_resp) { | |
393 | kfree(disc_req); | |
394 | return -ENOMEM; | |
395 | } | |
396 | ||
397 | disc_req[1] = SMP_DISCOVER; | |
398 | ||
399 | if (0 <= single && single < ex->num_phys) { | |
1acce194 | 400 | res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single); |
2908d778 JB |
401 | } else { |
402 | int i; | |
403 | ||
404 | for (i = 0; i < ex->num_phys; i++) { | |
1acce194 JB |
405 | res = sas_ex_phy_discover_helper(dev, disc_req, |
406 | disc_resp, i); | |
2908d778 JB |
407 | if (res) |
408 | goto out_err; | |
2908d778 JB |
409 | } |
410 | } | |
411 | out_err: | |
412 | kfree(disc_resp); | |
413 | kfree(disc_req); | |
414 | return res; | |
415 | } | |
416 | ||
417 | static int sas_expander_discover(struct domain_device *dev) | |
418 | { | |
419 | struct expander_device *ex = &dev->ex_dev; | |
420 | int res = -ENOMEM; | |
421 | ||
422 | ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL); | |
423 | if (!ex->ex_phy) | |
424 | return -ENOMEM; | |
425 | ||
426 | res = sas_ex_phy_discover(dev, -1); | |
427 | if (res) | |
428 | goto out_err; | |
429 | ||
430 | return 0; | |
431 | out_err: | |
432 | kfree(ex->ex_phy); | |
433 | ex->ex_phy = NULL; | |
434 | return res; | |
435 | } | |
436 | ||
437 | #define MAX_EXPANDER_PHYS 128 | |
438 | ||
439 | static void ex_assign_report_general(struct domain_device *dev, | |
440 | struct smp_resp *resp) | |
441 | { | |
442 | struct report_general_resp *rg = &resp->rg; | |
443 | ||
444 | dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count); | |
445 | dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes); | |
446 | dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS); | |
ffaac8f4 | 447 | dev->ex_dev.t2t_supp = rg->t2t_supp; |
2908d778 JB |
448 | dev->ex_dev.conf_route_table = rg->conf_route_table; |
449 | dev->ex_dev.configuring = rg->configuring; | |
450 | memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8); | |
451 | } | |
452 | ||
453 | #define RG_REQ_SIZE 8 | |
454 | #define RG_RESP_SIZE 32 | |
455 | ||
456 | static int sas_ex_general(struct domain_device *dev) | |
457 | { | |
458 | u8 *rg_req; | |
459 | struct smp_resp *rg_resp; | |
460 | int res; | |
461 | int i; | |
462 | ||
463 | rg_req = alloc_smp_req(RG_REQ_SIZE); | |
464 | if (!rg_req) | |
465 | return -ENOMEM; | |
466 | ||
467 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); | |
468 | if (!rg_resp) { | |
469 | kfree(rg_req); | |
470 | return -ENOMEM; | |
471 | } | |
472 | ||
473 | rg_req[1] = SMP_REPORT_GENERAL; | |
474 | ||
475 | for (i = 0; i < 5; i++) { | |
476 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, | |
477 | RG_RESP_SIZE); | |
478 | ||
479 | if (res) { | |
480 | SAS_DPRINTK("RG to ex %016llx failed:0x%x\n", | |
481 | SAS_ADDR(dev->sas_addr), res); | |
482 | goto out; | |
483 | } else if (rg_resp->result != SMP_RESP_FUNC_ACC) { | |
484 | SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n", | |
485 | SAS_ADDR(dev->sas_addr), rg_resp->result); | |
486 | res = rg_resp->result; | |
487 | goto out; | |
488 | } | |
489 | ||
490 | ex_assign_report_general(dev, rg_resp); | |
491 | ||
492 | if (dev->ex_dev.configuring) { | |
493 | SAS_DPRINTK("RG: ex %llx self-configuring...\n", | |
494 | SAS_ADDR(dev->sas_addr)); | |
495 | schedule_timeout_interruptible(5*HZ); | |
496 | } else | |
497 | break; | |
498 | } | |
499 | out: | |
500 | kfree(rg_req); | |
501 | kfree(rg_resp); | |
502 | return res; | |
503 | } | |
504 | ||
505 | static void ex_assign_manuf_info(struct domain_device *dev, void | |
506 | *_mi_resp) | |
507 | { | |
508 | u8 *mi_resp = _mi_resp; | |
509 | struct sas_rphy *rphy = dev->rphy; | |
510 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); | |
511 | ||
512 | memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN); | |
513 | memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN); | |
514 | memcpy(edev->product_rev, mi_resp + 36, | |
515 | SAS_EXPANDER_PRODUCT_REV_LEN); | |
516 | ||
517 | if (mi_resp[8] & 1) { | |
518 | memcpy(edev->component_vendor_id, mi_resp + 40, | |
519 | SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN); | |
520 | edev->component_id = mi_resp[48] << 8 | mi_resp[49]; | |
521 | edev->component_revision_id = mi_resp[50]; | |
522 | } | |
523 | } | |
524 | ||
525 | #define MI_REQ_SIZE 8 | |
526 | #define MI_RESP_SIZE 64 | |
527 | ||
528 | static int sas_ex_manuf_info(struct domain_device *dev) | |
529 | { | |
530 | u8 *mi_req; | |
531 | u8 *mi_resp; | |
532 | int res; | |
533 | ||
534 | mi_req = alloc_smp_req(MI_REQ_SIZE); | |
535 | if (!mi_req) | |
536 | return -ENOMEM; | |
537 | ||
538 | mi_resp = alloc_smp_resp(MI_RESP_SIZE); | |
539 | if (!mi_resp) { | |
540 | kfree(mi_req); | |
541 | return -ENOMEM; | |
542 | } | |
543 | ||
544 | mi_req[1] = SMP_REPORT_MANUF_INFO; | |
545 | ||
546 | res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE); | |
547 | if (res) { | |
548 | SAS_DPRINTK("MI: ex %016llx failed:0x%x\n", | |
549 | SAS_ADDR(dev->sas_addr), res); | |
550 | goto out; | |
551 | } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) { | |
552 | SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n", | |
553 | SAS_ADDR(dev->sas_addr), mi_resp[2]); | |
554 | goto out; | |
555 | } | |
556 | ||
557 | ex_assign_manuf_info(dev, mi_resp); | |
558 | out: | |
559 | kfree(mi_req); | |
560 | kfree(mi_resp); | |
561 | return res; | |
562 | } | |
563 | ||
564 | #define PC_REQ_SIZE 44 | |
565 | #define PC_RESP_SIZE 8 | |
566 | ||
567 | int sas_smp_phy_control(struct domain_device *dev, int phy_id, | |
a01e70e5 JB |
568 | enum phy_func phy_func, |
569 | struct sas_phy_linkrates *rates) | |
2908d778 JB |
570 | { |
571 | u8 *pc_req; | |
572 | u8 *pc_resp; | |
573 | int res; | |
574 | ||
575 | pc_req = alloc_smp_req(PC_REQ_SIZE); | |
576 | if (!pc_req) | |
577 | return -ENOMEM; | |
578 | ||
579 | pc_resp = alloc_smp_resp(PC_RESP_SIZE); | |
580 | if (!pc_resp) { | |
581 | kfree(pc_req); | |
582 | return -ENOMEM; | |
583 | } | |
584 | ||
585 | pc_req[1] = SMP_PHY_CONTROL; | |
586 | pc_req[9] = phy_id; | |
587 | pc_req[10]= phy_func; | |
a01e70e5 JB |
588 | if (rates) { |
589 | pc_req[32] = rates->minimum_linkrate << 4; | |
590 | pc_req[33] = rates->maximum_linkrate << 4; | |
591 | } | |
2908d778 JB |
592 | |
593 | res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE); | |
594 | ||
595 | kfree(pc_resp); | |
596 | kfree(pc_req); | |
597 | return res; | |
598 | } | |
599 | ||
600 | static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) | |
601 | { | |
602 | struct expander_device *ex = &dev->ex_dev; | |
603 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
604 | ||
a01e70e5 | 605 | sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL); |
88edf746 | 606 | phy->linkrate = SAS_PHY_DISABLED; |
2908d778 JB |
607 | } |
608 | ||
609 | static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr) | |
610 | { | |
611 | struct expander_device *ex = &dev->ex_dev; | |
612 | int i; | |
613 | ||
614 | for (i = 0; i < ex->num_phys; i++) { | |
615 | struct ex_phy *phy = &ex->ex_phy[i]; | |
616 | ||
617 | if (phy->phy_state == PHY_VACANT || | |
618 | phy->phy_state == PHY_NOT_PRESENT) | |
619 | continue; | |
620 | ||
621 | if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr)) | |
622 | sas_ex_disable_phy(dev, i); | |
623 | } | |
624 | } | |
625 | ||
626 | static int sas_dev_present_in_domain(struct asd_sas_port *port, | |
627 | u8 *sas_addr) | |
628 | { | |
629 | struct domain_device *dev; | |
630 | ||
631 | if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr)) | |
632 | return 1; | |
633 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
634 | if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr)) | |
635 | return 1; | |
636 | } | |
637 | return 0; | |
638 | } | |
639 | ||
640 | #define RPEL_REQ_SIZE 16 | |
641 | #define RPEL_RESP_SIZE 32 | |
642 | int sas_smp_get_phy_events(struct sas_phy *phy) | |
643 | { | |
644 | int res; | |
92631fa4 JJ |
645 | u8 *req; |
646 | u8 *resp; | |
2908d778 JB |
647 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); |
648 | struct domain_device *dev = sas_find_dev_by_rphy(rphy); | |
2908d778 | 649 | |
92631fa4 JJ |
650 | req = alloc_smp_req(RPEL_REQ_SIZE); |
651 | if (!req) | |
2908d778 JB |
652 | return -ENOMEM; |
653 | ||
92631fa4 JJ |
654 | resp = alloc_smp_resp(RPEL_RESP_SIZE); |
655 | if (!resp) { | |
656 | kfree(req); | |
657 | return -ENOMEM; | |
658 | } | |
659 | ||
2908d778 JB |
660 | req[1] = SMP_REPORT_PHY_ERR_LOG; |
661 | req[9] = phy->number; | |
662 | ||
663 | res = smp_execute_task(dev, req, RPEL_REQ_SIZE, | |
664 | resp, RPEL_RESP_SIZE); | |
665 | ||
666 | if (!res) | |
667 | goto out; | |
668 | ||
669 | phy->invalid_dword_count = scsi_to_u32(&resp[12]); | |
670 | phy->running_disparity_error_count = scsi_to_u32(&resp[16]); | |
671 | phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]); | |
672 | phy->phy_reset_problem_count = scsi_to_u32(&resp[24]); | |
673 | ||
674 | out: | |
675 | kfree(resp); | |
676 | return res; | |
677 | ||
678 | } | |
679 | ||
b9142174 JB |
680 | #ifdef CONFIG_SCSI_SAS_ATA |
681 | ||
2908d778 JB |
682 | #define RPS_REQ_SIZE 16 |
683 | #define RPS_RESP_SIZE 60 | |
684 | ||
354cf829 DW |
685 | int sas_get_report_phy_sata(struct domain_device *dev, int phy_id, |
686 | struct smp_resp *rps_resp) | |
2908d778 JB |
687 | { |
688 | int res; | |
689 | u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE); | |
1acce194 | 690 | u8 *resp = (u8 *)rps_resp; |
2908d778 JB |
691 | |
692 | if (!rps_req) | |
693 | return -ENOMEM; | |
694 | ||
695 | rps_req[1] = SMP_REPORT_PHY_SATA; | |
696 | rps_req[9] = phy_id; | |
697 | ||
698 | res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE, | |
699 | rps_resp, RPS_RESP_SIZE); | |
700 | ||
1acce194 JB |
701 | /* 0x34 is the FIS type for the D2H fis. There's a potential |
702 | * standards cockup here. sas-2 explicitly specifies the FIS | |
703 | * should be encoded so that FIS type is in resp[24]. | |
704 | * However, some expanders endian reverse this. Undo the | |
705 | * reversal here */ | |
706 | if (!res && resp[27] == 0x34 && resp[24] != 0x34) { | |
707 | int i; | |
708 | ||
709 | for (i = 0; i < 5; i++) { | |
710 | int j = 24 + (i*4); | |
711 | u8 a, b; | |
712 | a = resp[j + 0]; | |
713 | b = resp[j + 1]; | |
714 | resp[j + 0] = resp[j + 3]; | |
715 | resp[j + 1] = resp[j + 2]; | |
716 | resp[j + 2] = b; | |
717 | resp[j + 3] = a; | |
718 | } | |
719 | } | |
720 | ||
2908d778 | 721 | kfree(rps_req); |
1acce194 | 722 | return res; |
2908d778 | 723 | } |
b9142174 | 724 | #endif |
2908d778 JB |
725 | |
726 | static void sas_ex_get_linkrate(struct domain_device *parent, | |
727 | struct domain_device *child, | |
728 | struct ex_phy *parent_phy) | |
729 | { | |
730 | struct expander_device *parent_ex = &parent->ex_dev; | |
731 | struct sas_port *port; | |
732 | int i; | |
733 | ||
734 | child->pathways = 0; | |
735 | ||
736 | port = parent_phy->port; | |
737 | ||
738 | for (i = 0; i < parent_ex->num_phys; i++) { | |
739 | struct ex_phy *phy = &parent_ex->ex_phy[i]; | |
740 | ||
741 | if (phy->phy_state == PHY_VACANT || | |
742 | phy->phy_state == PHY_NOT_PRESENT) | |
743 | continue; | |
744 | ||
745 | if (SAS_ADDR(phy->attached_sas_addr) == | |
746 | SAS_ADDR(child->sas_addr)) { | |
747 | ||
748 | child->min_linkrate = min(parent->min_linkrate, | |
749 | phy->linkrate); | |
750 | child->max_linkrate = max(parent->max_linkrate, | |
751 | phy->linkrate); | |
752 | child->pathways++; | |
753 | sas_port_add_phy(port, phy->phy); | |
754 | } | |
755 | } | |
756 | child->linkrate = min(parent_phy->linkrate, child->max_linkrate); | |
757 | child->pathways = min(child->pathways, parent->pathways); | |
758 | } | |
759 | ||
760 | static struct domain_device *sas_ex_discover_end_dev( | |
761 | struct domain_device *parent, int phy_id) | |
762 | { | |
763 | struct expander_device *parent_ex = &parent->ex_dev; | |
764 | struct ex_phy *phy = &parent_ex->ex_phy[phy_id]; | |
765 | struct domain_device *child = NULL; | |
766 | struct sas_rphy *rphy; | |
767 | int res; | |
768 | ||
769 | if (phy->attached_sata_host || phy->attached_sata_ps) | |
770 | return NULL; | |
771 | ||
735f7d2f | 772 | child = sas_alloc_device(); |
2908d778 JB |
773 | if (!child) |
774 | return NULL; | |
775 | ||
735f7d2f | 776 | kref_get(&parent->kref); |
2908d778 JB |
777 | child->parent = parent; |
778 | child->port = parent->port; | |
779 | child->iproto = phy->attached_iproto; | |
780 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
781 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); | |
024879ea JB |
782 | if (!phy->port) { |
783 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); | |
784 | if (unlikely(!phy->port)) | |
785 | goto out_err; | |
786 | if (unlikely(sas_port_add(phy->port) != 0)) { | |
787 | sas_port_free(phy->port); | |
788 | goto out_err; | |
789 | } | |
790 | } | |
2908d778 | 791 | sas_ex_get_linkrate(parent, child, phy); |
f41a0c44 | 792 | sas_device_set_phy(child, phy->port); |
2908d778 | 793 | |
b9142174 | 794 | #ifdef CONFIG_SCSI_SAS_ATA |
5929faf3 | 795 | if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) { |
354cf829 DW |
796 | res = sas_get_ata_info(child, phy); |
797 | if (res) | |
024879ea | 798 | goto out_free; |
1acce194 | 799 | |
b2024459 DW |
800 | sas_init_dev(child); |
801 | res = sas_ata_init(child); | |
802 | if (res) | |
803 | goto out_free; | |
1acce194 | 804 | rphy = sas_end_device_alloc(phy->port); |
b2024459 | 805 | if (!rphy) |
528fd552 | 806 | goto out_free; |
1acce194 | 807 | |
1acce194 | 808 | child->rphy = rphy; |
9487669f | 809 | get_device(&rphy->dev); |
1acce194 | 810 | |
87c8331f | 811 | list_add_tail(&child->disco_list_node, &parent->port->disco_list); |
1acce194 | 812 | |
2908d778 JB |
813 | res = sas_discover_sata(child); |
814 | if (res) { | |
815 | SAS_DPRINTK("sas_discover_sata() for device %16llx at " | |
816 | "%016llx:0x%x returned 0x%x\n", | |
817 | SAS_ADDR(child->sas_addr), | |
818 | SAS_ADDR(parent->sas_addr), phy_id, res); | |
1acce194 | 819 | goto out_list_del; |
2908d778 | 820 | } |
b9142174 JB |
821 | } else |
822 | #endif | |
5929faf3 | 823 | if (phy->attached_tproto & SAS_PROTOCOL_SSP) { |
2908d778 JB |
824 | child->dev_type = SAS_END_DEV; |
825 | rphy = sas_end_device_alloc(phy->port); | |
826 | /* FIXME: error handling */ | |
024879ea JB |
827 | if (unlikely(!rphy)) |
828 | goto out_free; | |
2908d778 JB |
829 | child->tproto = phy->attached_tproto; |
830 | sas_init_dev(child); | |
831 | ||
832 | child->rphy = rphy; | |
9487669f | 833 | get_device(&rphy->dev); |
2908d778 JB |
834 | sas_fill_in_rphy(child, rphy); |
835 | ||
92625f9b | 836 | list_add_tail(&child->disco_list_node, &parent->port->disco_list); |
2908d778 JB |
837 | |
838 | res = sas_discover_end_dev(child); | |
839 | if (res) { | |
840 | SAS_DPRINTK("sas_discover_end_dev() for device %16llx " | |
841 | "at %016llx:0x%x returned 0x%x\n", | |
842 | SAS_ADDR(child->sas_addr), | |
843 | SAS_ADDR(parent->sas_addr), phy_id, res); | |
024879ea | 844 | goto out_list_del; |
2908d778 JB |
845 | } |
846 | } else { | |
847 | SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n", | |
848 | phy->attached_tproto, SAS_ADDR(parent->sas_addr), | |
849 | phy_id); | |
b9142174 | 850 | goto out_free; |
2908d778 JB |
851 | } |
852 | ||
853 | list_add_tail(&child->siblings, &parent_ex->children); | |
854 | return child; | |
024879ea JB |
855 | |
856 | out_list_del: | |
6f63caae | 857 | sas_rphy_free(child->rphy); |
87c8331f | 858 | list_del(&child->disco_list_node); |
1a34c064 | 859 | spin_lock_irq(&parent->port->dev_list_lock); |
024879ea | 860 | list_del(&child->dev_list_node); |
1a34c064 | 861 | spin_unlock_irq(&parent->port->dev_list_lock); |
024879ea JB |
862 | out_free: |
863 | sas_port_delete(phy->port); | |
864 | out_err: | |
865 | phy->port = NULL; | |
735f7d2f | 866 | sas_put_device(child); |
024879ea | 867 | return NULL; |
2908d778 JB |
868 | } |
869 | ||
423f7cf4 | 870 | /* See if this phy is part of a wide port */ |
b17caa17 | 871 | static bool sas_ex_join_wide_port(struct domain_device *parent, int phy_id) |
423f7cf4 DW |
872 | { |
873 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; | |
874 | int i; | |
875 | ||
876 | for (i = 0; i < parent->ex_dev.num_phys; i++) { | |
877 | struct ex_phy *ephy = &parent->ex_dev.ex_phy[i]; | |
878 | ||
879 | if (ephy == phy) | |
880 | continue; | |
881 | ||
882 | if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr, | |
883 | SAS_ADDR_SIZE) && ephy->port) { | |
884 | sas_port_add_phy(ephy->port, phy->phy); | |
19252de6 | 885 | phy->port = ephy->port; |
423f7cf4 | 886 | phy->phy_state = PHY_DEVICE_DISCOVERED; |
b17caa17 | 887 | return true; |
423f7cf4 DW |
888 | } |
889 | } | |
890 | ||
b17caa17 | 891 | return false; |
423f7cf4 DW |
892 | } |
893 | ||
2908d778 JB |
894 | static struct domain_device *sas_ex_discover_expander( |
895 | struct domain_device *parent, int phy_id) | |
896 | { | |
897 | struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy); | |
898 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; | |
899 | struct domain_device *child = NULL; | |
900 | struct sas_rphy *rphy; | |
901 | struct sas_expander_device *edev; | |
902 | struct asd_sas_port *port; | |
903 | int res; | |
904 | ||
905 | if (phy->routing_attr == DIRECT_ROUTING) { | |
906 | SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not " | |
907 | "allowed\n", | |
908 | SAS_ADDR(parent->sas_addr), phy_id, | |
909 | SAS_ADDR(phy->attached_sas_addr), | |
910 | phy->attached_phy_id); | |
911 | return NULL; | |
912 | } | |
735f7d2f | 913 | child = sas_alloc_device(); |
2908d778 JB |
914 | if (!child) |
915 | return NULL; | |
916 | ||
917 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); | |
918 | /* FIXME: better error handling */ | |
919 | BUG_ON(sas_port_add(phy->port) != 0); | |
920 | ||
921 | ||
922 | switch (phy->attached_dev_type) { | |
923 | case EDGE_DEV: | |
924 | rphy = sas_expander_alloc(phy->port, | |
925 | SAS_EDGE_EXPANDER_DEVICE); | |
926 | break; | |
927 | case FANOUT_DEV: | |
928 | rphy = sas_expander_alloc(phy->port, | |
929 | SAS_FANOUT_EXPANDER_DEVICE); | |
930 | break; | |
931 | default: | |
932 | rphy = NULL; /* shut gcc up */ | |
933 | BUG(); | |
934 | } | |
935 | port = parent->port; | |
936 | child->rphy = rphy; | |
9487669f | 937 | get_device(&rphy->dev); |
2908d778 JB |
938 | edev = rphy_to_expander_device(rphy); |
939 | child->dev_type = phy->attached_dev_type; | |
735f7d2f | 940 | kref_get(&parent->kref); |
2908d778 JB |
941 | child->parent = parent; |
942 | child->port = port; | |
943 | child->iproto = phy->attached_iproto; | |
944 | child->tproto = phy->attached_tproto; | |
945 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
946 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); | |
947 | sas_ex_get_linkrate(parent, child, phy); | |
948 | edev->level = parent_ex->level + 1; | |
949 | parent->port->disc.max_level = max(parent->port->disc.max_level, | |
950 | edev->level); | |
951 | sas_init_dev(child); | |
952 | sas_fill_in_rphy(child, rphy); | |
953 | sas_rphy_add(rphy); | |
954 | ||
9d720d82 | 955 | spin_lock_irq(&parent->port->dev_list_lock); |
2908d778 | 956 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
9d720d82 | 957 | spin_unlock_irq(&parent->port->dev_list_lock); |
2908d778 JB |
958 | |
959 | res = sas_discover_expander(child); | |
960 | if (res) { | |
9487669f | 961 | sas_rphy_delete(rphy); |
5911e963 LT |
962 | spin_lock_irq(&parent->port->dev_list_lock); |
963 | list_del(&child->dev_list_node); | |
964 | spin_unlock_irq(&parent->port->dev_list_lock); | |
735f7d2f | 965 | sas_put_device(child); |
2908d778 JB |
966 | return NULL; |
967 | } | |
968 | list_add_tail(&child->siblings, &parent->ex_dev.children); | |
969 | return child; | |
970 | } | |
971 | ||
972 | static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) | |
973 | { | |
974 | struct expander_device *ex = &dev->ex_dev; | |
975 | struct ex_phy *ex_phy = &ex->ex_phy[phy_id]; | |
976 | struct domain_device *child = NULL; | |
977 | int res = 0; | |
978 | ||
979 | /* Phy state */ | |
88edf746 | 980 | if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) { |
a01e70e5 | 981 | if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL)) |
2908d778 JB |
982 | res = sas_ex_phy_discover(dev, phy_id); |
983 | if (res) | |
984 | return res; | |
985 | } | |
986 | ||
987 | /* Parent and domain coherency */ | |
988 | if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == | |
989 | SAS_ADDR(dev->port->sas_addr))) { | |
990 | sas_add_parent_port(dev, phy_id); | |
991 | return 0; | |
992 | } | |
993 | if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == | |
994 | SAS_ADDR(dev->parent->sas_addr))) { | |
995 | sas_add_parent_port(dev, phy_id); | |
996 | if (ex_phy->routing_attr == TABLE_ROUTING) | |
997 | sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1); | |
998 | return 0; | |
999 | } | |
1000 | ||
1001 | if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr)) | |
1002 | sas_ex_disable_port(dev, ex_phy->attached_sas_addr); | |
1003 | ||
1004 | if (ex_phy->attached_dev_type == NO_DEVICE) { | |
1005 | if (ex_phy->routing_attr == DIRECT_ROUTING) { | |
1006 | memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE); | |
1007 | sas_configure_routing(dev, ex_phy->attached_sas_addr); | |
1008 | } | |
1009 | return 0; | |
88edf746 | 1010 | } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN) |
2908d778 JB |
1011 | return 0; |
1012 | ||
1013 | if (ex_phy->attached_dev_type != SAS_END_DEV && | |
1014 | ex_phy->attached_dev_type != FANOUT_DEV && | |
354cf829 DW |
1015 | ex_phy->attached_dev_type != EDGE_DEV && |
1016 | ex_phy->attached_dev_type != SATA_PENDING) { | |
2908d778 JB |
1017 | SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx " |
1018 | "phy 0x%x\n", ex_phy->attached_dev_type, | |
1019 | SAS_ADDR(dev->sas_addr), | |
1020 | phy_id); | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | res = sas_configure_routing(dev, ex_phy->attached_sas_addr); | |
1025 | if (res) { | |
1026 | SAS_DPRINTK("configure routing for dev %016llx " | |
1027 | "reported 0x%x. Forgotten\n", | |
1028 | SAS_ADDR(ex_phy->attached_sas_addr), res); | |
1029 | sas_disable_routing(dev, ex_phy->attached_sas_addr); | |
1030 | return res; | |
1031 | } | |
1032 | ||
b17caa17 | 1033 | if (sas_ex_join_wide_port(dev, phy_id)) { |
423f7cf4 DW |
1034 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", |
1035 | phy_id, SAS_ADDR(ex_phy->attached_sas_addr)); | |
1036 | return res; | |
1037 | } | |
1038 | ||
2908d778 JB |
1039 | switch (ex_phy->attached_dev_type) { |
1040 | case SAS_END_DEV: | |
354cf829 | 1041 | case SATA_PENDING: |
2908d778 JB |
1042 | child = sas_ex_discover_end_dev(dev, phy_id); |
1043 | break; | |
1044 | case FANOUT_DEV: | |
1045 | if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) { | |
1046 | SAS_DPRINTK("second fanout expander %016llx phy 0x%x " | |
1047 | "attached to ex %016llx phy 0x%x\n", | |
1048 | SAS_ADDR(ex_phy->attached_sas_addr), | |
1049 | ex_phy->attached_phy_id, | |
1050 | SAS_ADDR(dev->sas_addr), | |
1051 | phy_id); | |
1052 | sas_ex_disable_phy(dev, phy_id); | |
1053 | break; | |
1054 | } else | |
1055 | memcpy(dev->port->disc.fanout_sas_addr, | |
1056 | ex_phy->attached_sas_addr, SAS_ADDR_SIZE); | |
1057 | /* fallthrough */ | |
1058 | case EDGE_DEV: | |
1059 | child = sas_ex_discover_expander(dev, phy_id); | |
1060 | break; | |
1061 | default: | |
1062 | break; | |
1063 | } | |
1064 | ||
1065 | if (child) { | |
1066 | int i; | |
1067 | ||
1068 | for (i = 0; i < ex->num_phys; i++) { | |
1069 | if (ex->ex_phy[i].phy_state == PHY_VACANT || | |
1070 | ex->ex_phy[i].phy_state == PHY_NOT_PRESENT) | |
1071 | continue; | |
19252de6 TP |
1072 | /* |
1073 | * Due to races, the phy might not get added to the | |
1074 | * wide port, so we add the phy to the wide port here. | |
1075 | */ | |
2908d778 | 1076 | if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) == |
19252de6 | 1077 | SAS_ADDR(child->sas_addr)) { |
2908d778 | 1078 | ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED; |
b17caa17 | 1079 | if (sas_ex_join_wide_port(dev, i)) |
19252de6 TP |
1080 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", |
1081 | i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr)); | |
1082 | ||
1083 | } | |
2908d778 JB |
1084 | } |
1085 | } | |
1086 | ||
1087 | return res; | |
1088 | } | |
1089 | ||
1090 | static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr) | |
1091 | { | |
1092 | struct expander_device *ex = &dev->ex_dev; | |
1093 | int i; | |
1094 | ||
1095 | for (i = 0; i < ex->num_phys; i++) { | |
1096 | struct ex_phy *phy = &ex->ex_phy[i]; | |
1097 | ||
1098 | if (phy->phy_state == PHY_VACANT || | |
1099 | phy->phy_state == PHY_NOT_PRESENT) | |
1100 | continue; | |
1101 | ||
1102 | if ((phy->attached_dev_type == EDGE_DEV || | |
1103 | phy->attached_dev_type == FANOUT_DEV) && | |
1104 | phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1105 | ||
1106 | memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE); | |
1107 | ||
1108 | return 1; | |
1109 | } | |
1110 | } | |
1111 | return 0; | |
1112 | } | |
1113 | ||
1114 | static int sas_check_level_subtractive_boundary(struct domain_device *dev) | |
1115 | { | |
1116 | struct expander_device *ex = &dev->ex_dev; | |
1117 | struct domain_device *child; | |
1118 | u8 sub_addr[8] = {0, }; | |
1119 | ||
1120 | list_for_each_entry(child, &ex->children, siblings) { | |
1121 | if (child->dev_type != EDGE_DEV && | |
1122 | child->dev_type != FANOUT_DEV) | |
1123 | continue; | |
1124 | if (sub_addr[0] == 0) { | |
1125 | sas_find_sub_addr(child, sub_addr); | |
1126 | continue; | |
1127 | } else { | |
1128 | u8 s2[8]; | |
1129 | ||
1130 | if (sas_find_sub_addr(child, s2) && | |
1131 | (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) { | |
1132 | ||
1133 | SAS_DPRINTK("ex %016llx->%016llx-?->%016llx " | |
1134 | "diverges from subtractive " | |
1135 | "boundary %016llx\n", | |
1136 | SAS_ADDR(dev->sas_addr), | |
1137 | SAS_ADDR(child->sas_addr), | |
1138 | SAS_ADDR(s2), | |
1139 | SAS_ADDR(sub_addr)); | |
1140 | ||
1141 | sas_ex_disable_port(child, s2); | |
1142 | } | |
1143 | } | |
1144 | } | |
1145 | return 0; | |
1146 | } | |
1147 | /** | |
1148 | * sas_ex_discover_devices -- discover devices attached to this expander | |
1149 | * dev: pointer to the expander domain device | |
1150 | * single: if you want to do a single phy, else set to -1; | |
1151 | * | |
1152 | * Configure this expander for use with its devices and register the | |
1153 | * devices of this expander. | |
1154 | */ | |
1155 | static int sas_ex_discover_devices(struct domain_device *dev, int single) | |
1156 | { | |
1157 | struct expander_device *ex = &dev->ex_dev; | |
1158 | int i = 0, end = ex->num_phys; | |
1159 | int res = 0; | |
1160 | ||
1161 | if (0 <= single && single < end) { | |
1162 | i = single; | |
1163 | end = i+1; | |
1164 | } | |
1165 | ||
1166 | for ( ; i < end; i++) { | |
1167 | struct ex_phy *ex_phy = &ex->ex_phy[i]; | |
1168 | ||
1169 | if (ex_phy->phy_state == PHY_VACANT || | |
1170 | ex_phy->phy_state == PHY_NOT_PRESENT || | |
1171 | ex_phy->phy_state == PHY_DEVICE_DISCOVERED) | |
1172 | continue; | |
1173 | ||
1174 | switch (ex_phy->linkrate) { | |
88edf746 JB |
1175 | case SAS_PHY_DISABLED: |
1176 | case SAS_PHY_RESET_PROBLEM: | |
1177 | case SAS_SATA_PORT_SELECTOR: | |
2908d778 JB |
1178 | continue; |
1179 | default: | |
1180 | res = sas_ex_discover_dev(dev, i); | |
1181 | if (res) | |
1182 | break; | |
1183 | continue; | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | if (!res) | |
1188 | sas_check_level_subtractive_boundary(dev); | |
1189 | ||
1190 | return res; | |
1191 | } | |
1192 | ||
1193 | static int sas_check_ex_subtractive_boundary(struct domain_device *dev) | |
1194 | { | |
1195 | struct expander_device *ex = &dev->ex_dev; | |
1196 | int i; | |
1197 | u8 *sub_sas_addr = NULL; | |
1198 | ||
1199 | if (dev->dev_type != EDGE_DEV) | |
1200 | return 0; | |
1201 | ||
1202 | for (i = 0; i < ex->num_phys; i++) { | |
1203 | struct ex_phy *phy = &ex->ex_phy[i]; | |
1204 | ||
1205 | if (phy->phy_state == PHY_VACANT || | |
1206 | phy->phy_state == PHY_NOT_PRESENT) | |
1207 | continue; | |
1208 | ||
1209 | if ((phy->attached_dev_type == FANOUT_DEV || | |
1210 | phy->attached_dev_type == EDGE_DEV) && | |
1211 | phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1212 | ||
1213 | if (!sub_sas_addr) | |
1214 | sub_sas_addr = &phy->attached_sas_addr[0]; | |
1215 | else if (SAS_ADDR(sub_sas_addr) != | |
1216 | SAS_ADDR(phy->attached_sas_addr)) { | |
1217 | ||
1218 | SAS_DPRINTK("ex %016llx phy 0x%x " | |
1219 | "diverges(%016llx) on subtractive " | |
1220 | "boundary(%016llx). Disabled\n", | |
1221 | SAS_ADDR(dev->sas_addr), i, | |
1222 | SAS_ADDR(phy->attached_sas_addr), | |
1223 | SAS_ADDR(sub_sas_addr)); | |
1224 | sas_ex_disable_phy(dev, i); | |
1225 | } | |
1226 | } | |
1227 | } | |
1228 | return 0; | |
1229 | } | |
1230 | ||
1231 | static void sas_print_parent_topology_bug(struct domain_device *child, | |
1232 | struct ex_phy *parent_phy, | |
1233 | struct ex_phy *child_phy) | |
1234 | { | |
2908d778 JB |
1235 | static const char *ex_type[] = { |
1236 | [EDGE_DEV] = "edge", | |
1237 | [FANOUT_DEV] = "fanout", | |
1238 | }; | |
1239 | struct domain_device *parent = child->parent; | |
1240 | ||
d214d81e DW |
1241 | sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx " |
1242 | "phy 0x%x has %c:%c routing link!\n", | |
2908d778 JB |
1243 | |
1244 | ex_type[parent->dev_type], | |
1245 | SAS_ADDR(parent->sas_addr), | |
1246 | parent_phy->phy_id, | |
1247 | ||
1248 | ex_type[child->dev_type], | |
1249 | SAS_ADDR(child->sas_addr), | |
1250 | child_phy->phy_id, | |
1251 | ||
d214d81e DW |
1252 | sas_route_char(parent, parent_phy), |
1253 | sas_route_char(child, child_phy)); | |
2908d778 JB |
1254 | } |
1255 | ||
1256 | static int sas_check_eeds(struct domain_device *child, | |
1257 | struct ex_phy *parent_phy, | |
1258 | struct ex_phy *child_phy) | |
1259 | { | |
1260 | int res = 0; | |
1261 | struct domain_device *parent = child->parent; | |
1262 | ||
1263 | if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) { | |
1264 | res = -ENODEV; | |
1265 | SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx " | |
1266 | "phy S:0x%x, while there is a fanout ex %016llx\n", | |
1267 | SAS_ADDR(parent->sas_addr), | |
1268 | parent_phy->phy_id, | |
1269 | SAS_ADDR(child->sas_addr), | |
1270 | child_phy->phy_id, | |
1271 | SAS_ADDR(parent->port->disc.fanout_sas_addr)); | |
1272 | } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) { | |
1273 | memcpy(parent->port->disc.eeds_a, parent->sas_addr, | |
1274 | SAS_ADDR_SIZE); | |
1275 | memcpy(parent->port->disc.eeds_b, child->sas_addr, | |
1276 | SAS_ADDR_SIZE); | |
1277 | } else if (((SAS_ADDR(parent->port->disc.eeds_a) == | |
1278 | SAS_ADDR(parent->sas_addr)) || | |
1279 | (SAS_ADDR(parent->port->disc.eeds_a) == | |
1280 | SAS_ADDR(child->sas_addr))) | |
1281 | && | |
1282 | ((SAS_ADDR(parent->port->disc.eeds_b) == | |
1283 | SAS_ADDR(parent->sas_addr)) || | |
1284 | (SAS_ADDR(parent->port->disc.eeds_b) == | |
1285 | SAS_ADDR(child->sas_addr)))) | |
1286 | ; | |
1287 | else { | |
1288 | res = -ENODEV; | |
1289 | SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx " | |
1290 | "phy 0x%x link forms a third EEDS!\n", | |
1291 | SAS_ADDR(parent->sas_addr), | |
1292 | parent_phy->phy_id, | |
1293 | SAS_ADDR(child->sas_addr), | |
1294 | child_phy->phy_id); | |
1295 | } | |
1296 | ||
1297 | return res; | |
1298 | } | |
1299 | ||
1300 | /* Here we spill over 80 columns. It is intentional. | |
1301 | */ | |
1302 | static int sas_check_parent_topology(struct domain_device *child) | |
1303 | { | |
1304 | struct expander_device *child_ex = &child->ex_dev; | |
1305 | struct expander_device *parent_ex; | |
1306 | int i; | |
1307 | int res = 0; | |
1308 | ||
1309 | if (!child->parent) | |
1310 | return 0; | |
1311 | ||
1312 | if (child->parent->dev_type != EDGE_DEV && | |
1313 | child->parent->dev_type != FANOUT_DEV) | |
1314 | return 0; | |
1315 | ||
1316 | parent_ex = &child->parent->ex_dev; | |
1317 | ||
1318 | for (i = 0; i < parent_ex->num_phys; i++) { | |
1319 | struct ex_phy *parent_phy = &parent_ex->ex_phy[i]; | |
1320 | struct ex_phy *child_phy; | |
1321 | ||
1322 | if (parent_phy->phy_state == PHY_VACANT || | |
1323 | parent_phy->phy_state == PHY_NOT_PRESENT) | |
1324 | continue; | |
1325 | ||
1326 | if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr)) | |
1327 | continue; | |
1328 | ||
1329 | child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; | |
1330 | ||
1331 | switch (child->parent->dev_type) { | |
1332 | case EDGE_DEV: | |
1333 | if (child->dev_type == FANOUT_DEV) { | |
1334 | if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || | |
1335 | child_phy->routing_attr != TABLE_ROUTING) { | |
1336 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1337 | res = -ENODEV; | |
1338 | } | |
1339 | } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1340 | if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1341 | res = sas_check_eeds(child, parent_phy, child_phy); | |
1342 | } else if (child_phy->routing_attr != TABLE_ROUTING) { | |
1343 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1344 | res = -ENODEV; | |
1345 | } | |
ffaac8f4 LT |
1346 | } else if (parent_phy->routing_attr == TABLE_ROUTING) { |
1347 | if (child_phy->routing_attr == SUBTRACTIVE_ROUTING || | |
1348 | (child_phy->routing_attr == TABLE_ROUTING && | |
1349 | child_ex->t2t_supp && parent_ex->t2t_supp)) { | |
1350 | /* All good */; | |
1351 | } else { | |
1352 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1353 | res = -ENODEV; | |
1354 | } | |
2908d778 JB |
1355 | } |
1356 | break; | |
1357 | case FANOUT_DEV: | |
1358 | if (parent_phy->routing_attr != TABLE_ROUTING || | |
1359 | child_phy->routing_attr != SUBTRACTIVE_ROUTING) { | |
1360 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1361 | res = -ENODEV; | |
1362 | } | |
1363 | break; | |
1364 | default: | |
1365 | break; | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | return res; | |
1370 | } | |
1371 | ||
1372 | #define RRI_REQ_SIZE 16 | |
1373 | #define RRI_RESP_SIZE 44 | |
1374 | ||
1375 | static int sas_configure_present(struct domain_device *dev, int phy_id, | |
1376 | u8 *sas_addr, int *index, int *present) | |
1377 | { | |
1378 | int i, res = 0; | |
1379 | struct expander_device *ex = &dev->ex_dev; | |
1380 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
1381 | u8 *rri_req; | |
1382 | u8 *rri_resp; | |
1383 | ||
1384 | *present = 0; | |
1385 | *index = 0; | |
1386 | ||
1387 | rri_req = alloc_smp_req(RRI_REQ_SIZE); | |
1388 | if (!rri_req) | |
1389 | return -ENOMEM; | |
1390 | ||
1391 | rri_resp = alloc_smp_resp(RRI_RESP_SIZE); | |
1392 | if (!rri_resp) { | |
1393 | kfree(rri_req); | |
1394 | return -ENOMEM; | |
1395 | } | |
1396 | ||
1397 | rri_req[1] = SMP_REPORT_ROUTE_INFO; | |
1398 | rri_req[9] = phy_id; | |
1399 | ||
1400 | for (i = 0; i < ex->max_route_indexes ; i++) { | |
1401 | *(__be16 *)(rri_req+6) = cpu_to_be16(i); | |
1402 | res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp, | |
1403 | RRI_RESP_SIZE); | |
1404 | if (res) | |
1405 | goto out; | |
1406 | res = rri_resp[2]; | |
1407 | if (res == SMP_RESP_NO_INDEX) { | |
1408 | SAS_DPRINTK("overflow of indexes: dev %016llx " | |
1409 | "phy 0x%x index 0x%x\n", | |
1410 | SAS_ADDR(dev->sas_addr), phy_id, i); | |
1411 | goto out; | |
1412 | } else if (res != SMP_RESP_FUNC_ACC) { | |
1413 | SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x " | |
cadbd4a5 | 1414 | "result 0x%x\n", __func__, |
2908d778 JB |
1415 | SAS_ADDR(dev->sas_addr), phy_id, i, res); |
1416 | goto out; | |
1417 | } | |
1418 | if (SAS_ADDR(sas_addr) != 0) { | |
1419 | if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) { | |
1420 | *index = i; | |
1421 | if ((rri_resp[12] & 0x80) == 0x80) | |
1422 | *present = 0; | |
1423 | else | |
1424 | *present = 1; | |
1425 | goto out; | |
1426 | } else if (SAS_ADDR(rri_resp+16) == 0) { | |
1427 | *index = i; | |
1428 | *present = 0; | |
1429 | goto out; | |
1430 | } | |
1431 | } else if (SAS_ADDR(rri_resp+16) == 0 && | |
1432 | phy->last_da_index < i) { | |
1433 | phy->last_da_index = i; | |
1434 | *index = i; | |
1435 | *present = 0; | |
1436 | goto out; | |
1437 | } | |
1438 | } | |
1439 | res = -1; | |
1440 | out: | |
1441 | kfree(rri_req); | |
1442 | kfree(rri_resp); | |
1443 | return res; | |
1444 | } | |
1445 | ||
1446 | #define CRI_REQ_SIZE 44 | |
1447 | #define CRI_RESP_SIZE 8 | |
1448 | ||
1449 | static int sas_configure_set(struct domain_device *dev, int phy_id, | |
1450 | u8 *sas_addr, int index, int include) | |
1451 | { | |
1452 | int res; | |
1453 | u8 *cri_req; | |
1454 | u8 *cri_resp; | |
1455 | ||
1456 | cri_req = alloc_smp_req(CRI_REQ_SIZE); | |
1457 | if (!cri_req) | |
1458 | return -ENOMEM; | |
1459 | ||
1460 | cri_resp = alloc_smp_resp(CRI_RESP_SIZE); | |
1461 | if (!cri_resp) { | |
1462 | kfree(cri_req); | |
1463 | return -ENOMEM; | |
1464 | } | |
1465 | ||
1466 | cri_req[1] = SMP_CONF_ROUTE_INFO; | |
1467 | *(__be16 *)(cri_req+6) = cpu_to_be16(index); | |
1468 | cri_req[9] = phy_id; | |
1469 | if (SAS_ADDR(sas_addr) == 0 || !include) | |
1470 | cri_req[12] |= 0x80; | |
1471 | memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE); | |
1472 | ||
1473 | res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp, | |
1474 | CRI_RESP_SIZE); | |
1475 | if (res) | |
1476 | goto out; | |
1477 | res = cri_resp[2]; | |
1478 | if (res == SMP_RESP_NO_INDEX) { | |
1479 | SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x " | |
1480 | "index 0x%x\n", | |
1481 | SAS_ADDR(dev->sas_addr), phy_id, index); | |
1482 | } | |
1483 | out: | |
1484 | kfree(cri_req); | |
1485 | kfree(cri_resp); | |
1486 | return res; | |
1487 | } | |
1488 | ||
1489 | static int sas_configure_phy(struct domain_device *dev, int phy_id, | |
1490 | u8 *sas_addr, int include) | |
1491 | { | |
1492 | int index; | |
1493 | int present; | |
1494 | int res; | |
1495 | ||
1496 | res = sas_configure_present(dev, phy_id, sas_addr, &index, &present); | |
1497 | if (res) | |
1498 | return res; | |
1499 | if (include ^ present) | |
1500 | return sas_configure_set(dev, phy_id, sas_addr, index,include); | |
1501 | ||
1502 | return res; | |
1503 | } | |
1504 | ||
1505 | /** | |
1506 | * sas_configure_parent -- configure routing table of parent | |
1507 | * parent: parent expander | |
1508 | * child: child expander | |
1509 | * sas_addr: SAS port identifier of device directly attached to child | |
1510 | */ | |
1511 | static int sas_configure_parent(struct domain_device *parent, | |
1512 | struct domain_device *child, | |
1513 | u8 *sas_addr, int include) | |
1514 | { | |
1515 | struct expander_device *ex_parent = &parent->ex_dev; | |
1516 | int res = 0; | |
1517 | int i; | |
1518 | ||
1519 | if (parent->parent) { | |
1520 | res = sas_configure_parent(parent->parent, parent, sas_addr, | |
1521 | include); | |
1522 | if (res) | |
1523 | return res; | |
1524 | } | |
1525 | ||
1526 | if (ex_parent->conf_route_table == 0) { | |
1527 | SAS_DPRINTK("ex %016llx has self-configuring routing table\n", | |
1528 | SAS_ADDR(parent->sas_addr)); | |
1529 | return 0; | |
1530 | } | |
1531 | ||
1532 | for (i = 0; i < ex_parent->num_phys; i++) { | |
1533 | struct ex_phy *phy = &ex_parent->ex_phy[i]; | |
1534 | ||
1535 | if ((phy->routing_attr == TABLE_ROUTING) && | |
1536 | (SAS_ADDR(phy->attached_sas_addr) == | |
1537 | SAS_ADDR(child->sas_addr))) { | |
1538 | res = sas_configure_phy(parent, i, sas_addr, include); | |
1539 | if (res) | |
1540 | return res; | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | return res; | |
1545 | } | |
1546 | ||
1547 | /** | |
1548 | * sas_configure_routing -- configure routing | |
1549 | * dev: expander device | |
1550 | * sas_addr: port identifier of device directly attached to the expander device | |
1551 | */ | |
1552 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr) | |
1553 | { | |
1554 | if (dev->parent) | |
1555 | return sas_configure_parent(dev->parent, dev, sas_addr, 1); | |
1556 | return 0; | |
1557 | } | |
1558 | ||
1559 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr) | |
1560 | { | |
1561 | if (dev->parent) | |
1562 | return sas_configure_parent(dev->parent, dev, sas_addr, 0); | |
1563 | return 0; | |
1564 | } | |
1565 | ||
2908d778 JB |
1566 | /** |
1567 | * sas_discover_expander -- expander discovery | |
1568 | * @ex: pointer to expander domain device | |
1569 | * | |
1570 | * See comment in sas_discover_sata(). | |
1571 | */ | |
1572 | static int sas_discover_expander(struct domain_device *dev) | |
1573 | { | |
1574 | int res; | |
1575 | ||
1576 | res = sas_notify_lldd_dev_found(dev); | |
1577 | if (res) | |
1578 | return res; | |
1579 | ||
1580 | res = sas_ex_general(dev); | |
1581 | if (res) | |
1582 | goto out_err; | |
1583 | res = sas_ex_manuf_info(dev); | |
1584 | if (res) | |
1585 | goto out_err; | |
1586 | ||
1587 | res = sas_expander_discover(dev); | |
1588 | if (res) { | |
1589 | SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n", | |
1590 | SAS_ADDR(dev->sas_addr), res); | |
1591 | goto out_err; | |
1592 | } | |
1593 | ||
1594 | sas_check_ex_subtractive_boundary(dev); | |
1595 | res = sas_check_parent_topology(dev); | |
1596 | if (res) | |
1597 | goto out_err; | |
1598 | return 0; | |
1599 | out_err: | |
1600 | sas_notify_lldd_dev_gone(dev); | |
1601 | return res; | |
1602 | } | |
1603 | ||
1604 | static int sas_ex_level_discovery(struct asd_sas_port *port, const int level) | |
1605 | { | |
1606 | int res = 0; | |
1607 | struct domain_device *dev; | |
1608 | ||
1609 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
1610 | if (dev->dev_type == EDGE_DEV || | |
1611 | dev->dev_type == FANOUT_DEV) { | |
1612 | struct sas_expander_device *ex = | |
1613 | rphy_to_expander_device(dev->rphy); | |
1614 | ||
1615 | if (level == ex->level) | |
1616 | res = sas_ex_discover_devices(dev, -1); | |
1617 | else if (level > 0) | |
1618 | res = sas_ex_discover_devices(port->port_dev, -1); | |
1619 | ||
1620 | } | |
1621 | } | |
1622 | ||
1623 | return res; | |
1624 | } | |
1625 | ||
1626 | static int sas_ex_bfs_disc(struct asd_sas_port *port) | |
1627 | { | |
1628 | int res; | |
1629 | int level; | |
1630 | ||
1631 | do { | |
1632 | level = port->disc.max_level; | |
1633 | res = sas_ex_level_discovery(port, level); | |
1634 | mb(); | |
1635 | } while (level < port->disc.max_level); | |
1636 | ||
1637 | return res; | |
1638 | } | |
1639 | ||
1640 | int sas_discover_root_expander(struct domain_device *dev) | |
1641 | { | |
1642 | int res; | |
1643 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); | |
1644 | ||
bf451207 DW |
1645 | res = sas_rphy_add(dev->rphy); |
1646 | if (res) | |
1647 | goto out_err; | |
2908d778 JB |
1648 | |
1649 | ex->level = dev->port->disc.max_level; /* 0 */ | |
1650 | res = sas_discover_expander(dev); | |
bf451207 DW |
1651 | if (res) |
1652 | goto out_err2; | |
1653 | ||
1654 | sas_ex_bfs_disc(dev->port); | |
2908d778 JB |
1655 | |
1656 | return res; | |
bf451207 DW |
1657 | |
1658 | out_err2: | |
6f63caae | 1659 | sas_rphy_remove(dev->rphy); |
bf451207 | 1660 | out_err: |
bf451207 | 1661 | return res; |
2908d778 JB |
1662 | } |
1663 | ||
1664 | /* ---------- Domain revalidation ---------- */ | |
1665 | ||
1666 | static int sas_get_phy_discover(struct domain_device *dev, | |
1667 | int phy_id, struct smp_resp *disc_resp) | |
1668 | { | |
1669 | int res; | |
1670 | u8 *disc_req; | |
1671 | ||
1672 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); | |
1673 | if (!disc_req) | |
1674 | return -ENOMEM; | |
1675 | ||
1676 | disc_req[1] = SMP_DISCOVER; | |
1677 | disc_req[9] = phy_id; | |
1678 | ||
1679 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, | |
1680 | disc_resp, DISCOVER_RESP_SIZE); | |
1681 | if (res) | |
1682 | goto out; | |
1683 | else if (disc_resp->result != SMP_RESP_FUNC_ACC) { | |
1684 | res = disc_resp->result; | |
1685 | goto out; | |
1686 | } | |
1687 | out: | |
1688 | kfree(disc_req); | |
1689 | return res; | |
1690 | } | |
1691 | ||
1692 | static int sas_get_phy_change_count(struct domain_device *dev, | |
1693 | int phy_id, int *pcc) | |
1694 | { | |
1695 | int res; | |
1696 | struct smp_resp *disc_resp; | |
1697 | ||
1698 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); | |
1699 | if (!disc_resp) | |
1700 | return -ENOMEM; | |
1701 | ||
1702 | res = sas_get_phy_discover(dev, phy_id, disc_resp); | |
1703 | if (!res) | |
1704 | *pcc = disc_resp->disc.change_count; | |
1705 | ||
1706 | kfree(disc_resp); | |
1707 | return res; | |
1708 | } | |
1709 | ||
354cf829 DW |
1710 | static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id, |
1711 | u8 *sas_addr, enum sas_dev_type *type) | |
2908d778 JB |
1712 | { |
1713 | int res; | |
1714 | struct smp_resp *disc_resp; | |
1715 | struct discover_resp *dr; | |
1716 | ||
1717 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); | |
1718 | if (!disc_resp) | |
1719 | return -ENOMEM; | |
1720 | dr = &disc_resp->disc; | |
1721 | ||
1722 | res = sas_get_phy_discover(dev, phy_id, disc_resp); | |
354cf829 DW |
1723 | if (res == 0) { |
1724 | memcpy(sas_addr, disc_resp->disc.attached_sas_addr, 8); | |
1725 | *type = to_dev_type(dr); | |
1726 | if (*type == 0) | |
1727 | memset(sas_addr, 0, 8); | |
2908d778 JB |
1728 | } |
1729 | kfree(disc_resp); | |
1730 | return res; | |
1731 | } | |
1732 | ||
1733 | static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id, | |
19252de6 | 1734 | int from_phy, bool update) |
2908d778 JB |
1735 | { |
1736 | struct expander_device *ex = &dev->ex_dev; | |
1737 | int res = 0; | |
1738 | int i; | |
1739 | ||
1740 | for (i = from_phy; i < ex->num_phys; i++) { | |
1741 | int phy_change_count = 0; | |
1742 | ||
1743 | res = sas_get_phy_change_count(dev, i, &phy_change_count); | |
1699490d TJ |
1744 | switch (res) { |
1745 | case SMP_RESP_PHY_VACANT: | |
1746 | case SMP_RESP_NO_PHY: | |
1747 | continue; | |
1748 | case SMP_RESP_FUNC_ACC: | |
1749 | break; | |
1750 | default: | |
1751 | return res; | |
1752 | } | |
1753 | ||
1754 | if (phy_change_count != ex->ex_phy[i].phy_change_count) { | |
19252de6 TP |
1755 | if (update) |
1756 | ex->ex_phy[i].phy_change_count = | |
1757 | phy_change_count; | |
2908d778 JB |
1758 | *phy_id = i; |
1759 | return 0; | |
1760 | } | |
1761 | } | |
1699490d | 1762 | return 0; |
2908d778 JB |
1763 | } |
1764 | ||
1765 | static int sas_get_ex_change_count(struct domain_device *dev, int *ecc) | |
1766 | { | |
1767 | int res; | |
1768 | u8 *rg_req; | |
1769 | struct smp_resp *rg_resp; | |
1770 | ||
1771 | rg_req = alloc_smp_req(RG_REQ_SIZE); | |
1772 | if (!rg_req) | |
1773 | return -ENOMEM; | |
1774 | ||
1775 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); | |
1776 | if (!rg_resp) { | |
1777 | kfree(rg_req); | |
1778 | return -ENOMEM; | |
1779 | } | |
1780 | ||
1781 | rg_req[1] = SMP_REPORT_GENERAL; | |
1782 | ||
1783 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, | |
1784 | RG_RESP_SIZE); | |
1785 | if (res) | |
1786 | goto out; | |
1787 | if (rg_resp->result != SMP_RESP_FUNC_ACC) { | |
1788 | res = rg_resp->result; | |
1789 | goto out; | |
1790 | } | |
1791 | ||
1792 | *ecc = be16_to_cpu(rg_resp->rg.change_count); | |
1793 | out: | |
1794 | kfree(rg_resp); | |
1795 | kfree(rg_req); | |
1796 | return res; | |
1797 | } | |
19252de6 TP |
1798 | /** |
1799 | * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE). | |
1800 | * @dev:domain device to be detect. | |
1801 | * @src_dev: the device which originated BROADCAST(CHANGE). | |
1802 | * | |
1803 | * Add self-configuration expander suport. Suppose two expander cascading, | |
1804 | * when the first level expander is self-configuring, hotplug the disks in | |
1805 | * second level expander, BROADCAST(CHANGE) will not only be originated | |
1806 | * in the second level expander, but also be originated in the first level | |
1807 | * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say, | |
1808 | * expander changed count in two level expanders will all increment at least | |
1809 | * once, but the phy which chang count has changed is the source device which | |
1810 | * we concerned. | |
1811 | */ | |
2908d778 JB |
1812 | |
1813 | static int sas_find_bcast_dev(struct domain_device *dev, | |
1814 | struct domain_device **src_dev) | |
1815 | { | |
1816 | struct expander_device *ex = &dev->ex_dev; | |
1817 | int ex_change_count = -1; | |
19252de6 | 1818 | int phy_id = -1; |
2908d778 | 1819 | int res; |
19252de6 | 1820 | struct domain_device *ch; |
2908d778 JB |
1821 | |
1822 | res = sas_get_ex_change_count(dev, &ex_change_count); | |
1823 | if (res) | |
1824 | goto out; | |
19252de6 TP |
1825 | if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) { |
1826 | /* Just detect if this expander phys phy change count changed, | |
1827 | * in order to determine if this expander originate BROADCAST, | |
1828 | * and do not update phy change count field in our structure. | |
1829 | */ | |
1830 | res = sas_find_bcast_phy(dev, &phy_id, 0, false); | |
1831 | if (phy_id != -1) { | |
1832 | *src_dev = dev; | |
1833 | ex->ex_change_count = ex_change_count; | |
1834 | SAS_DPRINTK("Expander phy change count has changed\n"); | |
1835 | return res; | |
1836 | } else | |
1837 | SAS_DPRINTK("Expander phys DID NOT change\n"); | |
1838 | } | |
1839 | list_for_each_entry(ch, &ex->children, siblings) { | |
1840 | if (ch->dev_type == EDGE_DEV || ch->dev_type == FANOUT_DEV) { | |
1841 | res = sas_find_bcast_dev(ch, src_dev); | |
24926dad | 1842 | if (*src_dev) |
19252de6 | 1843 | return res; |
2908d778 JB |
1844 | } |
1845 | } | |
1846 | out: | |
1847 | return res; | |
1848 | } | |
1849 | ||
1a34c064 | 1850 | static void sas_unregister_ex_tree(struct asd_sas_port *port, struct domain_device *dev) |
2908d778 JB |
1851 | { |
1852 | struct expander_device *ex = &dev->ex_dev; | |
1853 | struct domain_device *child, *n; | |
1854 | ||
1855 | list_for_each_entry_safe(child, n, &ex->children, siblings) { | |
e139942d | 1856 | set_bit(SAS_DEV_GONE, &child->state); |
2908d778 JB |
1857 | if (child->dev_type == EDGE_DEV || |
1858 | child->dev_type == FANOUT_DEV) | |
1a34c064 | 1859 | sas_unregister_ex_tree(port, child); |
2908d778 | 1860 | else |
1a34c064 | 1861 | sas_unregister_dev(port, child); |
2908d778 | 1862 | } |
1a34c064 | 1863 | sas_unregister_dev(port, dev); |
2908d778 JB |
1864 | } |
1865 | ||
1866 | static void sas_unregister_devs_sas_addr(struct domain_device *parent, | |
19252de6 | 1867 | int phy_id, bool last) |
2908d778 JB |
1868 | { |
1869 | struct expander_device *ex_dev = &parent->ex_dev; | |
1870 | struct ex_phy *phy = &ex_dev->ex_phy[phy_id]; | |
f41a0c44 | 1871 | struct domain_device *child, *n, *found = NULL; |
19252de6 TP |
1872 | if (last) { |
1873 | list_for_each_entry_safe(child, n, | |
1874 | &ex_dev->children, siblings) { | |
1875 | if (SAS_ADDR(child->sas_addr) == | |
1876 | SAS_ADDR(phy->attached_sas_addr)) { | |
e139942d | 1877 | set_bit(SAS_DEV_GONE, &child->state); |
19252de6 TP |
1878 | if (child->dev_type == EDGE_DEV || |
1879 | child->dev_type == FANOUT_DEV) | |
1a34c064 | 1880 | sas_unregister_ex_tree(parent->port, child); |
19252de6 | 1881 | else |
1a34c064 | 1882 | sas_unregister_dev(parent->port, child); |
f41a0c44 | 1883 | found = child; |
19252de6 TP |
1884 | break; |
1885 | } | |
2908d778 | 1886 | } |
19252de6 | 1887 | sas_disable_routing(parent, phy->attached_sas_addr); |
2908d778 | 1888 | } |
2908d778 | 1889 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |
a73914c3 MS |
1890 | if (phy->port) { |
1891 | sas_port_delete_phy(phy->port, phy->phy); | |
f41a0c44 | 1892 | sas_device_set_phy(found, phy->port); |
a73914c3 MS |
1893 | if (phy->port->num_phys == 0) |
1894 | sas_port_delete(phy->port); | |
1895 | phy->port = NULL; | |
1896 | } | |
2908d778 JB |
1897 | } |
1898 | ||
1899 | static int sas_discover_bfs_by_root_level(struct domain_device *root, | |
1900 | const int level) | |
1901 | { | |
1902 | struct expander_device *ex_root = &root->ex_dev; | |
1903 | struct domain_device *child; | |
1904 | int res = 0; | |
1905 | ||
1906 | list_for_each_entry(child, &ex_root->children, siblings) { | |
1907 | if (child->dev_type == EDGE_DEV || | |
1908 | child->dev_type == FANOUT_DEV) { | |
1909 | struct sas_expander_device *ex = | |
1910 | rphy_to_expander_device(child->rphy); | |
1911 | ||
1912 | if (level > ex->level) | |
1913 | res = sas_discover_bfs_by_root_level(child, | |
1914 | level); | |
1915 | else if (level == ex->level) | |
1916 | res = sas_ex_discover_devices(child, -1); | |
1917 | } | |
1918 | } | |
1919 | return res; | |
1920 | } | |
1921 | ||
1922 | static int sas_discover_bfs_by_root(struct domain_device *dev) | |
1923 | { | |
1924 | int res; | |
1925 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); | |
1926 | int level = ex->level+1; | |
1927 | ||
1928 | res = sas_ex_discover_devices(dev, -1); | |
1929 | if (res) | |
1930 | goto out; | |
1931 | do { | |
1932 | res = sas_discover_bfs_by_root_level(dev, level); | |
1933 | mb(); | |
1934 | level += 1; | |
1935 | } while (level <= dev->port->disc.max_level); | |
1936 | out: | |
1937 | return res; | |
1938 | } | |
1939 | ||
1940 | static int sas_discover_new(struct domain_device *dev, int phy_id) | |
1941 | { | |
1942 | struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id]; | |
1943 | struct domain_device *child; | |
b17caa17 | 1944 | int res; |
2908d778 JB |
1945 | |
1946 | SAS_DPRINTK("ex %016llx phy%d new device attached\n", | |
1947 | SAS_ADDR(dev->sas_addr), phy_id); | |
1948 | res = sas_ex_phy_discover(dev, phy_id); | |
1949 | if (res) | |
b17caa17 DW |
1950 | return res; |
1951 | ||
1952 | if (sas_ex_join_wide_port(dev, phy_id)) | |
19252de6 | 1953 | return 0; |
b17caa17 | 1954 | |
2908d778 | 1955 | res = sas_ex_discover_devices(dev, phy_id); |
b17caa17 DW |
1956 | if (res) |
1957 | return res; | |
2908d778 JB |
1958 | list_for_each_entry(child, &dev->ex_dev.children, siblings) { |
1959 | if (SAS_ADDR(child->sas_addr) == | |
1960 | SAS_ADDR(ex_phy->attached_sas_addr)) { | |
1961 | if (child->dev_type == EDGE_DEV || | |
1962 | child->dev_type == FANOUT_DEV) | |
1963 | res = sas_discover_bfs_by_root(child); | |
1964 | break; | |
1965 | } | |
1966 | } | |
2908d778 JB |
1967 | return res; |
1968 | } | |
1969 | ||
354cf829 DW |
1970 | static bool dev_type_flutter(enum sas_dev_type new, enum sas_dev_type old) |
1971 | { | |
1972 | if (old == new) | |
1973 | return true; | |
1974 | ||
1975 | /* treat device directed resets as flutter, if we went | |
1976 | * SAS_END_DEV to SATA_PENDING the link needs recovery | |
1977 | */ | |
1978 | if ((old == SATA_PENDING && new == SAS_END_DEV) || | |
1979 | (old == SAS_END_DEV && new == SATA_PENDING)) | |
1980 | return true; | |
1981 | ||
1982 | return false; | |
1983 | } | |
1984 | ||
19252de6 | 1985 | static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last) |
2908d778 JB |
1986 | { |
1987 | struct expander_device *ex = &dev->ex_dev; | |
1988 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
354cf829 DW |
1989 | enum sas_dev_type type = NO_DEVICE; |
1990 | u8 sas_addr[8]; | |
2908d778 JB |
1991 | int res; |
1992 | ||
b2311a28 | 1993 | memset(sas_addr, 0, 8); |
354cf829 | 1994 | res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type); |
2908d778 JB |
1995 | switch (res) { |
1996 | case SMP_RESP_NO_PHY: | |
1997 | phy->phy_state = PHY_NOT_PRESENT; | |
19252de6 | 1998 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
354cf829 | 1999 | return res; |
2908d778 JB |
2000 | case SMP_RESP_PHY_VACANT: |
2001 | phy->phy_state = PHY_VACANT; | |
19252de6 | 2002 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
354cf829 | 2003 | return res; |
2908d778 JB |
2004 | case SMP_RESP_FUNC_ACC: |
2005 | break; | |
b2311a28 JS |
2006 | case -ECOMM: |
2007 | break; | |
2008 | default: | |
2009 | return res; | |
2908d778 JB |
2010 | } |
2011 | ||
b2311a28 | 2012 | if ((SAS_ADDR(sas_addr) == 0) || (res == -ECOMM)) { |
2908d778 | 2013 | phy->phy_state = PHY_EMPTY; |
19252de6 | 2014 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
354cf829 DW |
2015 | return res; |
2016 | } else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) && | |
2017 | dev_type_flutter(type, phy->attached_dev_type)) { | |
2018 | struct domain_device *ata_dev = sas_ex_to_ata(dev, phy_id); | |
2019 | char *action = ""; | |
2020 | ||
a01e70e5 | 2021 | sas_ex_phy_discover(dev, phy_id); |
354cf829 DW |
2022 | |
2023 | if (ata_dev && phy->attached_dev_type == SATA_PENDING) | |
2024 | action = ", needs recovery"; | |
2025 | SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter%s\n", | |
2026 | SAS_ADDR(dev->sas_addr), phy_id, action); | |
2027 | return res; | |
2028 | } | |
2029 | ||
c666aae6 DW |
2030 | /* delete the old link */ |
2031 | if (SAS_ADDR(phy->attached_sas_addr) && | |
2032 | SAS_ADDR(sas_addr) != SAS_ADDR(phy->attached_sas_addr)) { | |
2033 | SAS_DPRINTK("ex %016llx phy 0x%x replace %016llx\n", | |
2034 | SAS_ADDR(dev->sas_addr), phy_id, | |
2035 | SAS_ADDR(phy->attached_sas_addr)); | |
2036 | sas_unregister_devs_sas_addr(dev, phy_id, last); | |
2037 | } | |
2038 | ||
354cf829 | 2039 | return sas_discover_new(dev, phy_id); |
2908d778 JB |
2040 | } |
2041 | ||
19252de6 TP |
2042 | /** |
2043 | * sas_rediscover - revalidate the domain. | |
2044 | * @dev:domain device to be detect. | |
2045 | * @phy_id: the phy id will be detected. | |
2046 | * | |
2047 | * NOTE: this process _must_ quit (return) as soon as any connection | |
2048 | * errors are encountered. Connection recovery is done elsewhere. | |
2049 | * Discover process only interrogates devices in order to discover the | |
2050 | * domain.For plugging out, we un-register the device only when it is | |
2051 | * the last phy in the port, for other phys in this port, we just delete it | |
2052 | * from the port.For inserting, we do discovery when it is the | |
2053 | * first phy,for other phys in this port, we add it to the port to | |
2054 | * forming the wide-port. | |
2055 | */ | |
2908d778 JB |
2056 | static int sas_rediscover(struct domain_device *dev, const int phy_id) |
2057 | { | |
2058 | struct expander_device *ex = &dev->ex_dev; | |
2059 | struct ex_phy *changed_phy = &ex->ex_phy[phy_id]; | |
2060 | int res = 0; | |
2061 | int i; | |
19252de6 | 2062 | bool last = true; /* is this the last phy of the port */ |
2908d778 JB |
2063 | |
2064 | SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n", | |
2065 | SAS_ADDR(dev->sas_addr), phy_id); | |
2066 | ||
2067 | if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) { | |
2068 | for (i = 0; i < ex->num_phys; i++) { | |
2069 | struct ex_phy *phy = &ex->ex_phy[i]; | |
2070 | ||
2071 | if (i == phy_id) | |
2072 | continue; | |
2073 | if (SAS_ADDR(phy->attached_sas_addr) == | |
2074 | SAS_ADDR(changed_phy->attached_sas_addr)) { | |
2075 | SAS_DPRINTK("phy%d part of wide port with " | |
2076 | "phy%d\n", phy_id, i); | |
19252de6 TP |
2077 | last = false; |
2078 | break; | |
2908d778 JB |
2079 | } |
2080 | } | |
19252de6 | 2081 | res = sas_rediscover_dev(dev, phy_id, last); |
2908d778 JB |
2082 | } else |
2083 | res = sas_discover_new(dev, phy_id); | |
2908d778 JB |
2084 | return res; |
2085 | } | |
2086 | ||
2087 | /** | |
2088 | * sas_revalidate_domain -- revalidate the domain | |
2089 | * @port: port to the domain of interest | |
2090 | * | |
2091 | * NOTE: this process _must_ quit (return) as soon as any connection | |
2092 | * errors are encountered. Connection recovery is done elsewhere. | |
2093 | * Discover process only interrogates devices in order to discover the | |
2094 | * domain. | |
2095 | */ | |
2096 | int sas_ex_revalidate_domain(struct domain_device *port_dev) | |
2097 | { | |
2098 | int res; | |
2099 | struct domain_device *dev = NULL; | |
2100 | ||
2101 | res = sas_find_bcast_dev(port_dev, &dev); | |
26f2f199 | 2102 | while (res == 0 && dev) { |
2908d778 JB |
2103 | struct expander_device *ex = &dev->ex_dev; |
2104 | int i = 0, phy_id; | |
2105 | ||
2106 | do { | |
2107 | phy_id = -1; | |
19252de6 | 2108 | res = sas_find_bcast_phy(dev, &phy_id, i, true); |
2908d778 JB |
2109 | if (phy_id == -1) |
2110 | break; | |
2111 | res = sas_rediscover(dev, phy_id); | |
2112 | i = phy_id + 1; | |
2113 | } while (i < ex->num_phys); | |
26f2f199 DW |
2114 | |
2115 | dev = NULL; | |
2116 | res = sas_find_bcast_dev(port_dev, &dev); | |
2908d778 | 2117 | } |
2908d778 JB |
2118 | return res; |
2119 | } | |
2120 | ||
ba1fc175 FT |
2121 | int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, |
2122 | struct request *req) | |
2123 | { | |
2124 | struct domain_device *dev; | |
2cd614c8 | 2125 | int ret, type; |
ba1fc175 FT |
2126 | struct request *rsp = req->next_rq; |
2127 | ||
2128 | if (!rsp) { | |
2129 | printk("%s: space for a smp response is missing\n", | |
cadbd4a5 | 2130 | __func__); |
ba1fc175 FT |
2131 | return -EINVAL; |
2132 | } | |
2133 | ||
2cd614c8 | 2134 | /* no rphy means no smp target support (ie aic94xx host) */ |
b98e66fa JB |
2135 | if (!rphy) |
2136 | return sas_smp_host_handler(shost, req, rsp); | |
2137 | ||
2cd614c8 | 2138 | type = rphy->identify.device_type; |
ba1fc175 FT |
2139 | |
2140 | if (type != SAS_EDGE_EXPANDER_DEVICE && | |
2141 | type != SAS_FANOUT_EXPANDER_DEVICE) { | |
2142 | printk("%s: can we send a smp request to a device?\n", | |
cadbd4a5 | 2143 | __func__); |
ba1fc175 FT |
2144 | return -EINVAL; |
2145 | } | |
2146 | ||
2147 | dev = sas_find_dev_by_rphy(rphy); | |
2148 | if (!dev) { | |
cadbd4a5 | 2149 | printk("%s: fail to find a domain_device?\n", __func__); |
ba1fc175 FT |
2150 | return -EINVAL; |
2151 | } | |
2152 | ||
2153 | /* do we need to support multiple segments? */ | |
2154 | if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) { | |
2155 | printk("%s: multiple segments req %u %u, rsp %u %u\n", | |
b0790410 TH |
2156 | __func__, req->bio->bi_vcnt, blk_rq_bytes(req), |
2157 | rsp->bio->bi_vcnt, blk_rq_bytes(rsp)); | |
ba1fc175 FT |
2158 | return -EINVAL; |
2159 | } | |
2160 | ||
b0790410 TH |
2161 | ret = smp_execute_task(dev, bio_data(req->bio), blk_rq_bytes(req), |
2162 | bio_data(rsp->bio), blk_rq_bytes(rsp)); | |
2d4b63e1 JB |
2163 | if (ret > 0) { |
2164 | /* positive number is the untransferred residual */ | |
c3a4d78c | 2165 | rsp->resid_len = ret; |
5f49f631 | 2166 | req->resid_len = 0; |
2d4b63e1 | 2167 | ret = 0; |
5f49f631 TH |
2168 | } else if (ret == 0) { |
2169 | rsp->resid_len = 0; | |
2170 | req->resid_len = 0; | |
2d4b63e1 | 2171 | } |
ba1fc175 FT |
2172 | |
2173 | return ret; | |
2174 | } |