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> |
2908d778 JB |
27 | |
28 | #include "sas_internal.h" | |
29 | ||
30 | #include <scsi/scsi_transport.h> | |
31 | #include <scsi/scsi_transport_sas.h> | |
32 | #include "../scsi_sas_internal.h" | |
33 | ||
34 | static int sas_discover_expander(struct domain_device *dev); | |
35 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr); | |
36 | static int sas_configure_phy(struct domain_device *dev, int phy_id, | |
37 | u8 *sas_addr, int include); | |
38 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr); | |
39 | ||
2908d778 JB |
40 | /* ---------- SMP task management ---------- */ |
41 | ||
42 | static void smp_task_timedout(unsigned long _task) | |
43 | { | |
44 | struct sas_task *task = (void *) _task; | |
45 | unsigned long flags; | |
46 | ||
47 | spin_lock_irqsave(&task->task_state_lock, flags); | |
48 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
49 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
50 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
51 | ||
52 | complete(&task->completion); | |
53 | } | |
54 | ||
55 | static void smp_task_done(struct sas_task *task) | |
56 | { | |
57 | if (!del_timer(&task->timer)) | |
58 | return; | |
59 | complete(&task->completion); | |
60 | } | |
61 | ||
62 | /* Give it some long enough timeout. In seconds. */ | |
63 | #define SMP_TIMEOUT 10 | |
64 | ||
65 | static int smp_execute_task(struct domain_device *dev, void *req, int req_size, | |
66 | void *resp, int resp_size) | |
67 | { | |
42961ee8 | 68 | int res, retry; |
69 | struct sas_task *task = NULL; | |
2908d778 JB |
70 | struct sas_internal *i = |
71 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
72 | ||
42961ee8 | 73 | for (retry = 0; retry < 3; retry++) { |
74 | task = sas_alloc_task(GFP_KERNEL); | |
75 | if (!task) | |
76 | return -ENOMEM; | |
2908d778 | 77 | |
42961ee8 | 78 | task->dev = dev; |
79 | task->task_proto = dev->tproto; | |
80 | sg_init_one(&task->smp_task.smp_req, req, req_size); | |
81 | sg_init_one(&task->smp_task.smp_resp, resp, resp_size); | |
2908d778 | 82 | |
42961ee8 | 83 | task->task_done = smp_task_done; |
2908d778 | 84 | |
42961ee8 | 85 | task->timer.data = (unsigned long) task; |
86 | task->timer.function = smp_task_timedout; | |
87 | task->timer.expires = jiffies + SMP_TIMEOUT*HZ; | |
88 | add_timer(&task->timer); | |
2908d778 | 89 | |
42961ee8 | 90 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); |
2908d778 | 91 | |
42961ee8 | 92 | if (res) { |
93 | del_timer(&task->timer); | |
94 | SAS_DPRINTK("executing SMP task failed:%d\n", res); | |
2908d778 JB |
95 | goto ex_err; |
96 | } | |
42961ee8 | 97 | |
98 | wait_for_completion(&task->completion); | |
32e8ae36 | 99 | res = -ECOMM; |
42961ee8 | 100 | if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { |
101 | SAS_DPRINTK("smp task timed out or aborted\n"); | |
102 | i->dft->lldd_abort_task(task); | |
103 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { | |
104 | SAS_DPRINTK("SMP task aborted and not done\n"); | |
105 | goto ex_err; | |
106 | } | |
107 | } | |
108 | if (task->task_status.resp == SAS_TASK_COMPLETE && | |
109 | task->task_status.stat == SAM_GOOD) { | |
110 | res = 0; | |
111 | break; | |
2d4b63e1 JB |
112 | } if (task->task_status.resp == SAS_TASK_COMPLETE && |
113 | task->task_status.stat == SAS_DATA_UNDERRUN) { | |
114 | /* no error, but return the number of bytes of | |
115 | * underrun */ | |
116 | res = task->task_status.residual; | |
117 | break; | |
118 | } if (task->task_status.resp == SAS_TASK_COMPLETE && | |
119 | task->task_status.stat == SAS_DATA_OVERRUN) { | |
120 | res = -EMSGSIZE; | |
121 | break; | |
42961ee8 | 122 | } else { |
123 | SAS_DPRINTK("%s: task to dev %016llx response: 0x%x " | |
cadbd4a5 | 124 | "status 0x%x\n", __func__, |
42961ee8 | 125 | SAS_ADDR(dev->sas_addr), |
126 | task->task_status.resp, | |
127 | task->task_status.stat); | |
128 | sas_free_task(task); | |
129 | task = NULL; | |
130 | } | |
2908d778 | 131 | } |
2908d778 | 132 | ex_err: |
42961ee8 | 133 | BUG_ON(retry == 3 && task != NULL); |
134 | if (task != NULL) { | |
135 | sas_free_task(task); | |
136 | } | |
2908d778 JB |
137 | return res; |
138 | } | |
139 | ||
140 | /* ---------- Allocations ---------- */ | |
141 | ||
142 | static inline void *alloc_smp_req(int size) | |
143 | { | |
144 | u8 *p = kzalloc(size, GFP_KERNEL); | |
145 | if (p) | |
146 | p[0] = SMP_REQUEST; | |
147 | return p; | |
148 | } | |
149 | ||
150 | static inline void *alloc_smp_resp(int size) | |
151 | { | |
152 | return kzalloc(size, GFP_KERNEL); | |
153 | } | |
154 | ||
155 | /* ---------- Expander configuration ---------- */ | |
156 | ||
157 | static void sas_set_ex_phy(struct domain_device *dev, int phy_id, | |
158 | void *disc_resp) | |
159 | { | |
160 | struct expander_device *ex = &dev->ex_dev; | |
161 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
162 | struct smp_resp *resp = disc_resp; | |
163 | struct discover_resp *dr = &resp->disc; | |
164 | struct sas_rphy *rphy = dev->rphy; | |
165 | int rediscover = (phy->phy != NULL); | |
166 | ||
167 | if (!rediscover) { | |
168 | phy->phy = sas_phy_alloc(&rphy->dev, phy_id); | |
169 | ||
170 | /* FIXME: error_handling */ | |
171 | BUG_ON(!phy->phy); | |
172 | } | |
173 | ||
174 | switch (resp->result) { | |
175 | case SMP_RESP_PHY_VACANT: | |
176 | phy->phy_state = PHY_VACANT; | |
177 | return; | |
178 | default: | |
179 | phy->phy_state = PHY_NOT_PRESENT; | |
180 | return; | |
181 | case SMP_RESP_FUNC_ACC: | |
182 | phy->phy_state = PHY_EMPTY; /* do not know yet */ | |
183 | break; | |
184 | } | |
185 | ||
186 | phy->phy_id = phy_id; | |
187 | phy->attached_dev_type = dr->attached_dev_type; | |
188 | phy->linkrate = dr->linkrate; | |
189 | phy->attached_sata_host = dr->attached_sata_host; | |
190 | phy->attached_sata_dev = dr->attached_sata_dev; | |
191 | phy->attached_sata_ps = dr->attached_sata_ps; | |
192 | phy->attached_iproto = dr->iproto << 1; | |
193 | phy->attached_tproto = dr->tproto << 1; | |
194 | memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE); | |
195 | phy->attached_phy_id = dr->attached_phy_id; | |
196 | phy->phy_change_count = dr->change_count; | |
197 | phy->routing_attr = dr->routing_attr; | |
198 | phy->virtual = dr->virtual; | |
199 | phy->last_da_index = -1; | |
200 | ||
201 | phy->phy->identify.initiator_port_protocols = phy->attached_iproto; | |
202 | phy->phy->identify.target_port_protocols = phy->attached_tproto; | |
203 | phy->phy->identify.phy_identifier = phy_id; | |
a01e70e5 JB |
204 | phy->phy->minimum_linkrate_hw = dr->hmin_linkrate; |
205 | phy->phy->maximum_linkrate_hw = dr->hmax_linkrate; | |
206 | phy->phy->minimum_linkrate = dr->pmin_linkrate; | |
207 | phy->phy->maximum_linkrate = dr->pmax_linkrate; | |
88edf746 | 208 | phy->phy->negotiated_linkrate = phy->linkrate; |
2908d778 JB |
209 | |
210 | if (!rediscover) | |
211 | sas_phy_add(phy->phy); | |
212 | ||
213 | SAS_DPRINTK("ex %016llx phy%02d:%c attached: %016llx\n", | |
214 | SAS_ADDR(dev->sas_addr), phy->phy_id, | |
215 | phy->routing_attr == TABLE_ROUTING ? 'T' : | |
216 | phy->routing_attr == DIRECT_ROUTING ? 'D' : | |
217 | phy->routing_attr == SUBTRACTIVE_ROUTING ? 'S' : '?', | |
218 | SAS_ADDR(phy->attached_sas_addr)); | |
219 | ||
220 | return; | |
221 | } | |
222 | ||
223 | #define DISCOVER_REQ_SIZE 16 | |
224 | #define DISCOVER_RESP_SIZE 56 | |
225 | ||
1acce194 JB |
226 | static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req, |
227 | u8 *disc_resp, int single) | |
228 | { | |
229 | int i, res; | |
230 | ||
231 | disc_req[9] = single; | |
232 | for (i = 1 ; i < 3; i++) { | |
233 | struct discover_resp *dr; | |
234 | ||
235 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, | |
236 | disc_resp, DISCOVER_RESP_SIZE); | |
237 | if (res) | |
238 | return res; | |
239 | /* This is detecting a failure to transmit inital | |
240 | * dev to host FIS as described in section G.5 of | |
241 | * sas-2 r 04b */ | |
242 | dr = &((struct smp_resp *)disc_resp)->disc; | |
243 | if (!(dr->attached_dev_type == 0 && | |
244 | dr->attached_sata_dev)) | |
245 | break; | |
246 | /* In order to generate the dev to host FIS, we | |
247 | * send a link reset to the expander port */ | |
38e2f035 | 248 | sas_smp_phy_control(dev, single, PHY_FUNC_LINK_RESET, NULL); |
1acce194 JB |
249 | /* Wait for the reset to trigger the negotiation */ |
250 | msleep(500); | |
251 | } | |
252 | sas_set_ex_phy(dev, single, disc_resp); | |
253 | return 0; | |
254 | } | |
255 | ||
2908d778 JB |
256 | static int sas_ex_phy_discover(struct domain_device *dev, int single) |
257 | { | |
258 | struct expander_device *ex = &dev->ex_dev; | |
259 | int res = 0; | |
260 | u8 *disc_req; | |
261 | u8 *disc_resp; | |
262 | ||
263 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); | |
264 | if (!disc_req) | |
265 | return -ENOMEM; | |
266 | ||
267 | disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE); | |
268 | if (!disc_resp) { | |
269 | kfree(disc_req); | |
270 | return -ENOMEM; | |
271 | } | |
272 | ||
273 | disc_req[1] = SMP_DISCOVER; | |
274 | ||
275 | if (0 <= single && single < ex->num_phys) { | |
1acce194 | 276 | res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single); |
2908d778 JB |
277 | } else { |
278 | int i; | |
279 | ||
280 | for (i = 0; i < ex->num_phys; i++) { | |
1acce194 JB |
281 | res = sas_ex_phy_discover_helper(dev, disc_req, |
282 | disc_resp, i); | |
2908d778 JB |
283 | if (res) |
284 | goto out_err; | |
2908d778 JB |
285 | } |
286 | } | |
287 | out_err: | |
288 | kfree(disc_resp); | |
289 | kfree(disc_req); | |
290 | return res; | |
291 | } | |
292 | ||
293 | static int sas_expander_discover(struct domain_device *dev) | |
294 | { | |
295 | struct expander_device *ex = &dev->ex_dev; | |
296 | int res = -ENOMEM; | |
297 | ||
298 | ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL); | |
299 | if (!ex->ex_phy) | |
300 | return -ENOMEM; | |
301 | ||
302 | res = sas_ex_phy_discover(dev, -1); | |
303 | if (res) | |
304 | goto out_err; | |
305 | ||
306 | return 0; | |
307 | out_err: | |
308 | kfree(ex->ex_phy); | |
309 | ex->ex_phy = NULL; | |
310 | return res; | |
311 | } | |
312 | ||
313 | #define MAX_EXPANDER_PHYS 128 | |
314 | ||
315 | static void ex_assign_report_general(struct domain_device *dev, | |
316 | struct smp_resp *resp) | |
317 | { | |
318 | struct report_general_resp *rg = &resp->rg; | |
319 | ||
320 | dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count); | |
321 | dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes); | |
322 | dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS); | |
323 | dev->ex_dev.conf_route_table = rg->conf_route_table; | |
324 | dev->ex_dev.configuring = rg->configuring; | |
325 | memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8); | |
326 | } | |
327 | ||
328 | #define RG_REQ_SIZE 8 | |
329 | #define RG_RESP_SIZE 32 | |
330 | ||
331 | static int sas_ex_general(struct domain_device *dev) | |
332 | { | |
333 | u8 *rg_req; | |
334 | struct smp_resp *rg_resp; | |
335 | int res; | |
336 | int i; | |
337 | ||
338 | rg_req = alloc_smp_req(RG_REQ_SIZE); | |
339 | if (!rg_req) | |
340 | return -ENOMEM; | |
341 | ||
342 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); | |
343 | if (!rg_resp) { | |
344 | kfree(rg_req); | |
345 | return -ENOMEM; | |
346 | } | |
347 | ||
348 | rg_req[1] = SMP_REPORT_GENERAL; | |
349 | ||
350 | for (i = 0; i < 5; i++) { | |
351 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, | |
352 | RG_RESP_SIZE); | |
353 | ||
354 | if (res) { | |
355 | SAS_DPRINTK("RG to ex %016llx failed:0x%x\n", | |
356 | SAS_ADDR(dev->sas_addr), res); | |
357 | goto out; | |
358 | } else if (rg_resp->result != SMP_RESP_FUNC_ACC) { | |
359 | SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n", | |
360 | SAS_ADDR(dev->sas_addr), rg_resp->result); | |
361 | res = rg_resp->result; | |
362 | goto out; | |
363 | } | |
364 | ||
365 | ex_assign_report_general(dev, rg_resp); | |
366 | ||
367 | if (dev->ex_dev.configuring) { | |
368 | SAS_DPRINTK("RG: ex %llx self-configuring...\n", | |
369 | SAS_ADDR(dev->sas_addr)); | |
370 | schedule_timeout_interruptible(5*HZ); | |
371 | } else | |
372 | break; | |
373 | } | |
374 | out: | |
375 | kfree(rg_req); | |
376 | kfree(rg_resp); | |
377 | return res; | |
378 | } | |
379 | ||
380 | static void ex_assign_manuf_info(struct domain_device *dev, void | |
381 | *_mi_resp) | |
382 | { | |
383 | u8 *mi_resp = _mi_resp; | |
384 | struct sas_rphy *rphy = dev->rphy; | |
385 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); | |
386 | ||
387 | memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN); | |
388 | memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN); | |
389 | memcpy(edev->product_rev, mi_resp + 36, | |
390 | SAS_EXPANDER_PRODUCT_REV_LEN); | |
391 | ||
392 | if (mi_resp[8] & 1) { | |
393 | memcpy(edev->component_vendor_id, mi_resp + 40, | |
394 | SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN); | |
395 | edev->component_id = mi_resp[48] << 8 | mi_resp[49]; | |
396 | edev->component_revision_id = mi_resp[50]; | |
397 | } | |
398 | } | |
399 | ||
400 | #define MI_REQ_SIZE 8 | |
401 | #define MI_RESP_SIZE 64 | |
402 | ||
403 | static int sas_ex_manuf_info(struct domain_device *dev) | |
404 | { | |
405 | u8 *mi_req; | |
406 | u8 *mi_resp; | |
407 | int res; | |
408 | ||
409 | mi_req = alloc_smp_req(MI_REQ_SIZE); | |
410 | if (!mi_req) | |
411 | return -ENOMEM; | |
412 | ||
413 | mi_resp = alloc_smp_resp(MI_RESP_SIZE); | |
414 | if (!mi_resp) { | |
415 | kfree(mi_req); | |
416 | return -ENOMEM; | |
417 | } | |
418 | ||
419 | mi_req[1] = SMP_REPORT_MANUF_INFO; | |
420 | ||
421 | res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE); | |
422 | if (res) { | |
423 | SAS_DPRINTK("MI: ex %016llx failed:0x%x\n", | |
424 | SAS_ADDR(dev->sas_addr), res); | |
425 | goto out; | |
426 | } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) { | |
427 | SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n", | |
428 | SAS_ADDR(dev->sas_addr), mi_resp[2]); | |
429 | goto out; | |
430 | } | |
431 | ||
432 | ex_assign_manuf_info(dev, mi_resp); | |
433 | out: | |
434 | kfree(mi_req); | |
435 | kfree(mi_resp); | |
436 | return res; | |
437 | } | |
438 | ||
439 | #define PC_REQ_SIZE 44 | |
440 | #define PC_RESP_SIZE 8 | |
441 | ||
442 | int sas_smp_phy_control(struct domain_device *dev, int phy_id, | |
a01e70e5 JB |
443 | enum phy_func phy_func, |
444 | struct sas_phy_linkrates *rates) | |
2908d778 JB |
445 | { |
446 | u8 *pc_req; | |
447 | u8 *pc_resp; | |
448 | int res; | |
449 | ||
450 | pc_req = alloc_smp_req(PC_REQ_SIZE); | |
451 | if (!pc_req) | |
452 | return -ENOMEM; | |
453 | ||
454 | pc_resp = alloc_smp_resp(PC_RESP_SIZE); | |
455 | if (!pc_resp) { | |
456 | kfree(pc_req); | |
457 | return -ENOMEM; | |
458 | } | |
459 | ||
460 | pc_req[1] = SMP_PHY_CONTROL; | |
461 | pc_req[9] = phy_id; | |
462 | pc_req[10]= phy_func; | |
a01e70e5 JB |
463 | if (rates) { |
464 | pc_req[32] = rates->minimum_linkrate << 4; | |
465 | pc_req[33] = rates->maximum_linkrate << 4; | |
466 | } | |
2908d778 JB |
467 | |
468 | res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE); | |
469 | ||
470 | kfree(pc_resp); | |
471 | kfree(pc_req); | |
472 | return res; | |
473 | } | |
474 | ||
475 | static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) | |
476 | { | |
477 | struct expander_device *ex = &dev->ex_dev; | |
478 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
479 | ||
a01e70e5 | 480 | sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL); |
88edf746 | 481 | phy->linkrate = SAS_PHY_DISABLED; |
2908d778 JB |
482 | } |
483 | ||
484 | static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr) | |
485 | { | |
486 | struct expander_device *ex = &dev->ex_dev; | |
487 | int i; | |
488 | ||
489 | for (i = 0; i < ex->num_phys; i++) { | |
490 | struct ex_phy *phy = &ex->ex_phy[i]; | |
491 | ||
492 | if (phy->phy_state == PHY_VACANT || | |
493 | phy->phy_state == PHY_NOT_PRESENT) | |
494 | continue; | |
495 | ||
496 | if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr)) | |
497 | sas_ex_disable_phy(dev, i); | |
498 | } | |
499 | } | |
500 | ||
501 | static int sas_dev_present_in_domain(struct asd_sas_port *port, | |
502 | u8 *sas_addr) | |
503 | { | |
504 | struct domain_device *dev; | |
505 | ||
506 | if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr)) | |
507 | return 1; | |
508 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
509 | if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr)) | |
510 | return 1; | |
511 | } | |
512 | return 0; | |
513 | } | |
514 | ||
515 | #define RPEL_REQ_SIZE 16 | |
516 | #define RPEL_RESP_SIZE 32 | |
517 | int sas_smp_get_phy_events(struct sas_phy *phy) | |
518 | { | |
519 | int res; | |
92631fa4 JJ |
520 | u8 *req; |
521 | u8 *resp; | |
2908d778 JB |
522 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); |
523 | struct domain_device *dev = sas_find_dev_by_rphy(rphy); | |
2908d778 | 524 | |
92631fa4 JJ |
525 | req = alloc_smp_req(RPEL_REQ_SIZE); |
526 | if (!req) | |
2908d778 JB |
527 | return -ENOMEM; |
528 | ||
92631fa4 JJ |
529 | resp = alloc_smp_resp(RPEL_RESP_SIZE); |
530 | if (!resp) { | |
531 | kfree(req); | |
532 | return -ENOMEM; | |
533 | } | |
534 | ||
2908d778 JB |
535 | req[1] = SMP_REPORT_PHY_ERR_LOG; |
536 | req[9] = phy->number; | |
537 | ||
538 | res = smp_execute_task(dev, req, RPEL_REQ_SIZE, | |
539 | resp, RPEL_RESP_SIZE); | |
540 | ||
541 | if (!res) | |
542 | goto out; | |
543 | ||
544 | phy->invalid_dword_count = scsi_to_u32(&resp[12]); | |
545 | phy->running_disparity_error_count = scsi_to_u32(&resp[16]); | |
546 | phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]); | |
547 | phy->phy_reset_problem_count = scsi_to_u32(&resp[24]); | |
548 | ||
549 | out: | |
550 | kfree(resp); | |
551 | return res; | |
552 | ||
553 | } | |
554 | ||
b9142174 JB |
555 | #ifdef CONFIG_SCSI_SAS_ATA |
556 | ||
2908d778 JB |
557 | #define RPS_REQ_SIZE 16 |
558 | #define RPS_RESP_SIZE 60 | |
559 | ||
560 | static int sas_get_report_phy_sata(struct domain_device *dev, | |
561 | int phy_id, | |
562 | struct smp_resp *rps_resp) | |
563 | { | |
564 | int res; | |
565 | u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE); | |
1acce194 | 566 | u8 *resp = (u8 *)rps_resp; |
2908d778 JB |
567 | |
568 | if (!rps_req) | |
569 | return -ENOMEM; | |
570 | ||
571 | rps_req[1] = SMP_REPORT_PHY_SATA; | |
572 | rps_req[9] = phy_id; | |
573 | ||
574 | res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE, | |
575 | rps_resp, RPS_RESP_SIZE); | |
576 | ||
1acce194 JB |
577 | /* 0x34 is the FIS type for the D2H fis. There's a potential |
578 | * standards cockup here. sas-2 explicitly specifies the FIS | |
579 | * should be encoded so that FIS type is in resp[24]. | |
580 | * However, some expanders endian reverse this. Undo the | |
581 | * reversal here */ | |
582 | if (!res && resp[27] == 0x34 && resp[24] != 0x34) { | |
583 | int i; | |
584 | ||
585 | for (i = 0; i < 5; i++) { | |
586 | int j = 24 + (i*4); | |
587 | u8 a, b; | |
588 | a = resp[j + 0]; | |
589 | b = resp[j + 1]; | |
590 | resp[j + 0] = resp[j + 3]; | |
591 | resp[j + 1] = resp[j + 2]; | |
592 | resp[j + 2] = b; | |
593 | resp[j + 3] = a; | |
594 | } | |
595 | } | |
596 | ||
2908d778 | 597 | kfree(rps_req); |
1acce194 | 598 | return res; |
2908d778 | 599 | } |
b9142174 | 600 | #endif |
2908d778 JB |
601 | |
602 | static void sas_ex_get_linkrate(struct domain_device *parent, | |
603 | struct domain_device *child, | |
604 | struct ex_phy *parent_phy) | |
605 | { | |
606 | struct expander_device *parent_ex = &parent->ex_dev; | |
607 | struct sas_port *port; | |
608 | int i; | |
609 | ||
610 | child->pathways = 0; | |
611 | ||
612 | port = parent_phy->port; | |
613 | ||
614 | for (i = 0; i < parent_ex->num_phys; i++) { | |
615 | struct ex_phy *phy = &parent_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) == | |
622 | SAS_ADDR(child->sas_addr)) { | |
623 | ||
624 | child->min_linkrate = min(parent->min_linkrate, | |
625 | phy->linkrate); | |
626 | child->max_linkrate = max(parent->max_linkrate, | |
627 | phy->linkrate); | |
628 | child->pathways++; | |
629 | sas_port_add_phy(port, phy->phy); | |
630 | } | |
631 | } | |
632 | child->linkrate = min(parent_phy->linkrate, child->max_linkrate); | |
633 | child->pathways = min(child->pathways, parent->pathways); | |
634 | } | |
635 | ||
636 | static struct domain_device *sas_ex_discover_end_dev( | |
637 | struct domain_device *parent, int phy_id) | |
638 | { | |
639 | struct expander_device *parent_ex = &parent->ex_dev; | |
640 | struct ex_phy *phy = &parent_ex->ex_phy[phy_id]; | |
641 | struct domain_device *child = NULL; | |
642 | struct sas_rphy *rphy; | |
643 | int res; | |
644 | ||
645 | if (phy->attached_sata_host || phy->attached_sata_ps) | |
646 | return NULL; | |
647 | ||
648 | child = kzalloc(sizeof(*child), GFP_KERNEL); | |
649 | if (!child) | |
650 | return NULL; | |
651 | ||
652 | child->parent = parent; | |
653 | child->port = parent->port; | |
654 | child->iproto = phy->attached_iproto; | |
655 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
656 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); | |
024879ea JB |
657 | if (!phy->port) { |
658 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); | |
659 | if (unlikely(!phy->port)) | |
660 | goto out_err; | |
661 | if (unlikely(sas_port_add(phy->port) != 0)) { | |
662 | sas_port_free(phy->port); | |
663 | goto out_err; | |
664 | } | |
665 | } | |
2908d778 JB |
666 | sas_ex_get_linkrate(parent, child, phy); |
667 | ||
b9142174 | 668 | #ifdef CONFIG_SCSI_SAS_ATA |
5929faf3 | 669 | if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) { |
2908d778 | 670 | child->dev_type = SATA_DEV; |
5929faf3 | 671 | if (phy->attached_tproto & SAS_PROTOCOL_STP) |
2908d778 JB |
672 | child->tproto = phy->attached_tproto; |
673 | if (phy->attached_sata_dev) | |
674 | child->tproto |= SATA_DEV; | |
675 | res = sas_get_report_phy_sata(parent, phy_id, | |
676 | &child->sata_dev.rps_resp); | |
677 | if (res) { | |
678 | SAS_DPRINTK("report phy sata to %016llx:0x%x returned " | |
679 | "0x%x\n", SAS_ADDR(parent->sas_addr), | |
680 | phy_id, res); | |
024879ea | 681 | goto out_free; |
2908d778 JB |
682 | } |
683 | memcpy(child->frame_rcvd, &child->sata_dev.rps_resp.rps.fis, | |
684 | sizeof(struct dev_to_host_fis)); | |
1acce194 JB |
685 | |
686 | rphy = sas_end_device_alloc(phy->port); | |
528fd552 JB |
687 | if (unlikely(!rphy)) |
688 | goto out_free; | |
1acce194 | 689 | |
2908d778 | 690 | sas_init_dev(child); |
1acce194 JB |
691 | |
692 | child->rphy = rphy; | |
693 | ||
9d720d82 | 694 | spin_lock_irq(&parent->port->dev_list_lock); |
1acce194 | 695 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
9d720d82 | 696 | spin_unlock_irq(&parent->port->dev_list_lock); |
1acce194 | 697 | |
2908d778 JB |
698 | res = sas_discover_sata(child); |
699 | if (res) { | |
700 | SAS_DPRINTK("sas_discover_sata() for device %16llx at " | |
701 | "%016llx:0x%x returned 0x%x\n", | |
702 | SAS_ADDR(child->sas_addr), | |
703 | SAS_ADDR(parent->sas_addr), phy_id, res); | |
1acce194 | 704 | goto out_list_del; |
2908d778 | 705 | } |
b9142174 JB |
706 | } else |
707 | #endif | |
5929faf3 | 708 | if (phy->attached_tproto & SAS_PROTOCOL_SSP) { |
2908d778 JB |
709 | child->dev_type = SAS_END_DEV; |
710 | rphy = sas_end_device_alloc(phy->port); | |
711 | /* FIXME: error handling */ | |
024879ea JB |
712 | if (unlikely(!rphy)) |
713 | goto out_free; | |
2908d778 JB |
714 | child->tproto = phy->attached_tproto; |
715 | sas_init_dev(child); | |
716 | ||
717 | child->rphy = rphy; | |
718 | sas_fill_in_rphy(child, rphy); | |
719 | ||
9d720d82 | 720 | spin_lock_irq(&parent->port->dev_list_lock); |
2908d778 | 721 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
9d720d82 | 722 | spin_unlock_irq(&parent->port->dev_list_lock); |
2908d778 JB |
723 | |
724 | res = sas_discover_end_dev(child); | |
725 | if (res) { | |
726 | SAS_DPRINTK("sas_discover_end_dev() for device %16llx " | |
727 | "at %016llx:0x%x returned 0x%x\n", | |
728 | SAS_ADDR(child->sas_addr), | |
729 | SAS_ADDR(parent->sas_addr), phy_id, res); | |
024879ea | 730 | goto out_list_del; |
2908d778 JB |
731 | } |
732 | } else { | |
733 | SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n", | |
734 | phy->attached_tproto, SAS_ADDR(parent->sas_addr), | |
735 | phy_id); | |
b9142174 | 736 | goto out_free; |
2908d778 JB |
737 | } |
738 | ||
739 | list_add_tail(&child->siblings, &parent_ex->children); | |
740 | return child; | |
024879ea JB |
741 | |
742 | out_list_del: | |
6f63caae DW |
743 | sas_rphy_free(child->rphy); |
744 | child->rphy = NULL; | |
024879ea | 745 | list_del(&child->dev_list_node); |
024879ea JB |
746 | out_free: |
747 | sas_port_delete(phy->port); | |
748 | out_err: | |
749 | phy->port = NULL; | |
750 | kfree(child); | |
751 | return NULL; | |
2908d778 JB |
752 | } |
753 | ||
423f7cf4 DW |
754 | /* See if this phy is part of a wide port */ |
755 | static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id) | |
756 | { | |
757 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; | |
758 | int i; | |
759 | ||
760 | for (i = 0; i < parent->ex_dev.num_phys; i++) { | |
761 | struct ex_phy *ephy = &parent->ex_dev.ex_phy[i]; | |
762 | ||
763 | if (ephy == phy) | |
764 | continue; | |
765 | ||
766 | if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr, | |
767 | SAS_ADDR_SIZE) && ephy->port) { | |
768 | sas_port_add_phy(ephy->port, phy->phy); | |
769 | phy->phy_state = PHY_DEVICE_DISCOVERED; | |
770 | return 0; | |
771 | } | |
772 | } | |
773 | ||
774 | return -ENODEV; | |
775 | } | |
776 | ||
2908d778 JB |
777 | static struct domain_device *sas_ex_discover_expander( |
778 | struct domain_device *parent, int phy_id) | |
779 | { | |
780 | struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy); | |
781 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; | |
782 | struct domain_device *child = NULL; | |
783 | struct sas_rphy *rphy; | |
784 | struct sas_expander_device *edev; | |
785 | struct asd_sas_port *port; | |
786 | int res; | |
787 | ||
788 | if (phy->routing_attr == DIRECT_ROUTING) { | |
789 | SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not " | |
790 | "allowed\n", | |
791 | SAS_ADDR(parent->sas_addr), phy_id, | |
792 | SAS_ADDR(phy->attached_sas_addr), | |
793 | phy->attached_phy_id); | |
794 | return NULL; | |
795 | } | |
796 | child = kzalloc(sizeof(*child), GFP_KERNEL); | |
797 | if (!child) | |
798 | return NULL; | |
799 | ||
800 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); | |
801 | /* FIXME: better error handling */ | |
802 | BUG_ON(sas_port_add(phy->port) != 0); | |
803 | ||
804 | ||
805 | switch (phy->attached_dev_type) { | |
806 | case EDGE_DEV: | |
807 | rphy = sas_expander_alloc(phy->port, | |
808 | SAS_EDGE_EXPANDER_DEVICE); | |
809 | break; | |
810 | case FANOUT_DEV: | |
811 | rphy = sas_expander_alloc(phy->port, | |
812 | SAS_FANOUT_EXPANDER_DEVICE); | |
813 | break; | |
814 | default: | |
815 | rphy = NULL; /* shut gcc up */ | |
816 | BUG(); | |
817 | } | |
818 | port = parent->port; | |
819 | child->rphy = rphy; | |
820 | edev = rphy_to_expander_device(rphy); | |
821 | child->dev_type = phy->attached_dev_type; | |
822 | child->parent = parent; | |
823 | child->port = port; | |
824 | child->iproto = phy->attached_iproto; | |
825 | child->tproto = phy->attached_tproto; | |
826 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
827 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); | |
828 | sas_ex_get_linkrate(parent, child, phy); | |
829 | edev->level = parent_ex->level + 1; | |
830 | parent->port->disc.max_level = max(parent->port->disc.max_level, | |
831 | edev->level); | |
832 | sas_init_dev(child); | |
833 | sas_fill_in_rphy(child, rphy); | |
834 | sas_rphy_add(rphy); | |
835 | ||
9d720d82 | 836 | spin_lock_irq(&parent->port->dev_list_lock); |
2908d778 | 837 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
9d720d82 | 838 | spin_unlock_irq(&parent->port->dev_list_lock); |
2908d778 JB |
839 | |
840 | res = sas_discover_expander(child); | |
841 | if (res) { | |
842 | kfree(child); | |
843 | return NULL; | |
844 | } | |
845 | list_add_tail(&child->siblings, &parent->ex_dev.children); | |
846 | return child; | |
847 | } | |
848 | ||
849 | static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) | |
850 | { | |
851 | struct expander_device *ex = &dev->ex_dev; | |
852 | struct ex_phy *ex_phy = &ex->ex_phy[phy_id]; | |
853 | struct domain_device *child = NULL; | |
854 | int res = 0; | |
855 | ||
856 | /* Phy state */ | |
88edf746 | 857 | if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) { |
a01e70e5 | 858 | if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL)) |
2908d778 JB |
859 | res = sas_ex_phy_discover(dev, phy_id); |
860 | if (res) | |
861 | return res; | |
862 | } | |
863 | ||
864 | /* Parent and domain coherency */ | |
865 | if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == | |
866 | SAS_ADDR(dev->port->sas_addr))) { | |
867 | sas_add_parent_port(dev, phy_id); | |
868 | return 0; | |
869 | } | |
870 | if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == | |
871 | SAS_ADDR(dev->parent->sas_addr))) { | |
872 | sas_add_parent_port(dev, phy_id); | |
873 | if (ex_phy->routing_attr == TABLE_ROUTING) | |
874 | sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1); | |
875 | return 0; | |
876 | } | |
877 | ||
878 | if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr)) | |
879 | sas_ex_disable_port(dev, ex_phy->attached_sas_addr); | |
880 | ||
881 | if (ex_phy->attached_dev_type == NO_DEVICE) { | |
882 | if (ex_phy->routing_attr == DIRECT_ROUTING) { | |
883 | memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE); | |
884 | sas_configure_routing(dev, ex_phy->attached_sas_addr); | |
885 | } | |
886 | return 0; | |
88edf746 | 887 | } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN) |
2908d778 JB |
888 | return 0; |
889 | ||
890 | if (ex_phy->attached_dev_type != SAS_END_DEV && | |
891 | ex_phy->attached_dev_type != FANOUT_DEV && | |
892 | ex_phy->attached_dev_type != EDGE_DEV) { | |
893 | SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx " | |
894 | "phy 0x%x\n", ex_phy->attached_dev_type, | |
895 | SAS_ADDR(dev->sas_addr), | |
896 | phy_id); | |
897 | return 0; | |
898 | } | |
899 | ||
900 | res = sas_configure_routing(dev, ex_phy->attached_sas_addr); | |
901 | if (res) { | |
902 | SAS_DPRINTK("configure routing for dev %016llx " | |
903 | "reported 0x%x. Forgotten\n", | |
904 | SAS_ADDR(ex_phy->attached_sas_addr), res); | |
905 | sas_disable_routing(dev, ex_phy->attached_sas_addr); | |
906 | return res; | |
907 | } | |
908 | ||
423f7cf4 DW |
909 | res = sas_ex_join_wide_port(dev, phy_id); |
910 | if (!res) { | |
911 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", | |
912 | phy_id, SAS_ADDR(ex_phy->attached_sas_addr)); | |
913 | return res; | |
914 | } | |
915 | ||
2908d778 JB |
916 | switch (ex_phy->attached_dev_type) { |
917 | case SAS_END_DEV: | |
918 | child = sas_ex_discover_end_dev(dev, phy_id); | |
919 | break; | |
920 | case FANOUT_DEV: | |
921 | if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) { | |
922 | SAS_DPRINTK("second fanout expander %016llx phy 0x%x " | |
923 | "attached to ex %016llx phy 0x%x\n", | |
924 | SAS_ADDR(ex_phy->attached_sas_addr), | |
925 | ex_phy->attached_phy_id, | |
926 | SAS_ADDR(dev->sas_addr), | |
927 | phy_id); | |
928 | sas_ex_disable_phy(dev, phy_id); | |
929 | break; | |
930 | } else | |
931 | memcpy(dev->port->disc.fanout_sas_addr, | |
932 | ex_phy->attached_sas_addr, SAS_ADDR_SIZE); | |
933 | /* fallthrough */ | |
934 | case EDGE_DEV: | |
935 | child = sas_ex_discover_expander(dev, phy_id); | |
936 | break; | |
937 | default: | |
938 | break; | |
939 | } | |
940 | ||
941 | if (child) { | |
942 | int i; | |
943 | ||
944 | for (i = 0; i < ex->num_phys; i++) { | |
945 | if (ex->ex_phy[i].phy_state == PHY_VACANT || | |
946 | ex->ex_phy[i].phy_state == PHY_NOT_PRESENT) | |
947 | continue; | |
948 | ||
949 | if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) == | |
950 | SAS_ADDR(child->sas_addr)) | |
951 | ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED; | |
952 | } | |
953 | } | |
954 | ||
955 | return res; | |
956 | } | |
957 | ||
958 | static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr) | |
959 | { | |
960 | struct expander_device *ex = &dev->ex_dev; | |
961 | int i; | |
962 | ||
963 | for (i = 0; i < ex->num_phys; i++) { | |
964 | struct ex_phy *phy = &ex->ex_phy[i]; | |
965 | ||
966 | if (phy->phy_state == PHY_VACANT || | |
967 | phy->phy_state == PHY_NOT_PRESENT) | |
968 | continue; | |
969 | ||
970 | if ((phy->attached_dev_type == EDGE_DEV || | |
971 | phy->attached_dev_type == FANOUT_DEV) && | |
972 | phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
973 | ||
974 | memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE); | |
975 | ||
976 | return 1; | |
977 | } | |
978 | } | |
979 | return 0; | |
980 | } | |
981 | ||
982 | static int sas_check_level_subtractive_boundary(struct domain_device *dev) | |
983 | { | |
984 | struct expander_device *ex = &dev->ex_dev; | |
985 | struct domain_device *child; | |
986 | u8 sub_addr[8] = {0, }; | |
987 | ||
988 | list_for_each_entry(child, &ex->children, siblings) { | |
989 | if (child->dev_type != EDGE_DEV && | |
990 | child->dev_type != FANOUT_DEV) | |
991 | continue; | |
992 | if (sub_addr[0] == 0) { | |
993 | sas_find_sub_addr(child, sub_addr); | |
994 | continue; | |
995 | } else { | |
996 | u8 s2[8]; | |
997 | ||
998 | if (sas_find_sub_addr(child, s2) && | |
999 | (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) { | |
1000 | ||
1001 | SAS_DPRINTK("ex %016llx->%016llx-?->%016llx " | |
1002 | "diverges from subtractive " | |
1003 | "boundary %016llx\n", | |
1004 | SAS_ADDR(dev->sas_addr), | |
1005 | SAS_ADDR(child->sas_addr), | |
1006 | SAS_ADDR(s2), | |
1007 | SAS_ADDR(sub_addr)); | |
1008 | ||
1009 | sas_ex_disable_port(child, s2); | |
1010 | } | |
1011 | } | |
1012 | } | |
1013 | return 0; | |
1014 | } | |
1015 | /** | |
1016 | * sas_ex_discover_devices -- discover devices attached to this expander | |
1017 | * dev: pointer to the expander domain device | |
1018 | * single: if you want to do a single phy, else set to -1; | |
1019 | * | |
1020 | * Configure this expander for use with its devices and register the | |
1021 | * devices of this expander. | |
1022 | */ | |
1023 | static int sas_ex_discover_devices(struct domain_device *dev, int single) | |
1024 | { | |
1025 | struct expander_device *ex = &dev->ex_dev; | |
1026 | int i = 0, end = ex->num_phys; | |
1027 | int res = 0; | |
1028 | ||
1029 | if (0 <= single && single < end) { | |
1030 | i = single; | |
1031 | end = i+1; | |
1032 | } | |
1033 | ||
1034 | for ( ; i < end; i++) { | |
1035 | struct ex_phy *ex_phy = &ex->ex_phy[i]; | |
1036 | ||
1037 | if (ex_phy->phy_state == PHY_VACANT || | |
1038 | ex_phy->phy_state == PHY_NOT_PRESENT || | |
1039 | ex_phy->phy_state == PHY_DEVICE_DISCOVERED) | |
1040 | continue; | |
1041 | ||
1042 | switch (ex_phy->linkrate) { | |
88edf746 JB |
1043 | case SAS_PHY_DISABLED: |
1044 | case SAS_PHY_RESET_PROBLEM: | |
1045 | case SAS_SATA_PORT_SELECTOR: | |
2908d778 JB |
1046 | continue; |
1047 | default: | |
1048 | res = sas_ex_discover_dev(dev, i); | |
1049 | if (res) | |
1050 | break; | |
1051 | continue; | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | if (!res) | |
1056 | sas_check_level_subtractive_boundary(dev); | |
1057 | ||
1058 | return res; | |
1059 | } | |
1060 | ||
1061 | static int sas_check_ex_subtractive_boundary(struct domain_device *dev) | |
1062 | { | |
1063 | struct expander_device *ex = &dev->ex_dev; | |
1064 | int i; | |
1065 | u8 *sub_sas_addr = NULL; | |
1066 | ||
1067 | if (dev->dev_type != EDGE_DEV) | |
1068 | return 0; | |
1069 | ||
1070 | for (i = 0; i < ex->num_phys; i++) { | |
1071 | struct ex_phy *phy = &ex->ex_phy[i]; | |
1072 | ||
1073 | if (phy->phy_state == PHY_VACANT || | |
1074 | phy->phy_state == PHY_NOT_PRESENT) | |
1075 | continue; | |
1076 | ||
1077 | if ((phy->attached_dev_type == FANOUT_DEV || | |
1078 | phy->attached_dev_type == EDGE_DEV) && | |
1079 | phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1080 | ||
1081 | if (!sub_sas_addr) | |
1082 | sub_sas_addr = &phy->attached_sas_addr[0]; | |
1083 | else if (SAS_ADDR(sub_sas_addr) != | |
1084 | SAS_ADDR(phy->attached_sas_addr)) { | |
1085 | ||
1086 | SAS_DPRINTK("ex %016llx phy 0x%x " | |
1087 | "diverges(%016llx) on subtractive " | |
1088 | "boundary(%016llx). Disabled\n", | |
1089 | SAS_ADDR(dev->sas_addr), i, | |
1090 | SAS_ADDR(phy->attached_sas_addr), | |
1091 | SAS_ADDR(sub_sas_addr)); | |
1092 | sas_ex_disable_phy(dev, i); | |
1093 | } | |
1094 | } | |
1095 | } | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static void sas_print_parent_topology_bug(struct domain_device *child, | |
1100 | struct ex_phy *parent_phy, | |
1101 | struct ex_phy *child_phy) | |
1102 | { | |
1103 | static const char ra_char[] = { | |
1104 | [DIRECT_ROUTING] = 'D', | |
1105 | [SUBTRACTIVE_ROUTING] = 'S', | |
1106 | [TABLE_ROUTING] = 'T', | |
1107 | }; | |
1108 | static const char *ex_type[] = { | |
1109 | [EDGE_DEV] = "edge", | |
1110 | [FANOUT_DEV] = "fanout", | |
1111 | }; | |
1112 | struct domain_device *parent = child->parent; | |
1113 | ||
1114 | sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx phy 0x%x " | |
1115 | "has %c:%c routing link!\n", | |
1116 | ||
1117 | ex_type[parent->dev_type], | |
1118 | SAS_ADDR(parent->sas_addr), | |
1119 | parent_phy->phy_id, | |
1120 | ||
1121 | ex_type[child->dev_type], | |
1122 | SAS_ADDR(child->sas_addr), | |
1123 | child_phy->phy_id, | |
1124 | ||
1125 | ra_char[parent_phy->routing_attr], | |
1126 | ra_char[child_phy->routing_attr]); | |
1127 | } | |
1128 | ||
1129 | static int sas_check_eeds(struct domain_device *child, | |
1130 | struct ex_phy *parent_phy, | |
1131 | struct ex_phy *child_phy) | |
1132 | { | |
1133 | int res = 0; | |
1134 | struct domain_device *parent = child->parent; | |
1135 | ||
1136 | if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) { | |
1137 | res = -ENODEV; | |
1138 | SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx " | |
1139 | "phy S:0x%x, while there is a fanout ex %016llx\n", | |
1140 | SAS_ADDR(parent->sas_addr), | |
1141 | parent_phy->phy_id, | |
1142 | SAS_ADDR(child->sas_addr), | |
1143 | child_phy->phy_id, | |
1144 | SAS_ADDR(parent->port->disc.fanout_sas_addr)); | |
1145 | } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) { | |
1146 | memcpy(parent->port->disc.eeds_a, parent->sas_addr, | |
1147 | SAS_ADDR_SIZE); | |
1148 | memcpy(parent->port->disc.eeds_b, child->sas_addr, | |
1149 | SAS_ADDR_SIZE); | |
1150 | } else if (((SAS_ADDR(parent->port->disc.eeds_a) == | |
1151 | SAS_ADDR(parent->sas_addr)) || | |
1152 | (SAS_ADDR(parent->port->disc.eeds_a) == | |
1153 | SAS_ADDR(child->sas_addr))) | |
1154 | && | |
1155 | ((SAS_ADDR(parent->port->disc.eeds_b) == | |
1156 | SAS_ADDR(parent->sas_addr)) || | |
1157 | (SAS_ADDR(parent->port->disc.eeds_b) == | |
1158 | SAS_ADDR(child->sas_addr)))) | |
1159 | ; | |
1160 | else { | |
1161 | res = -ENODEV; | |
1162 | SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx " | |
1163 | "phy 0x%x link forms a third EEDS!\n", | |
1164 | SAS_ADDR(parent->sas_addr), | |
1165 | parent_phy->phy_id, | |
1166 | SAS_ADDR(child->sas_addr), | |
1167 | child_phy->phy_id); | |
1168 | } | |
1169 | ||
1170 | return res; | |
1171 | } | |
1172 | ||
1173 | /* Here we spill over 80 columns. It is intentional. | |
1174 | */ | |
1175 | static int sas_check_parent_topology(struct domain_device *child) | |
1176 | { | |
1177 | struct expander_device *child_ex = &child->ex_dev; | |
1178 | struct expander_device *parent_ex; | |
1179 | int i; | |
1180 | int res = 0; | |
1181 | ||
1182 | if (!child->parent) | |
1183 | return 0; | |
1184 | ||
1185 | if (child->parent->dev_type != EDGE_DEV && | |
1186 | child->parent->dev_type != FANOUT_DEV) | |
1187 | return 0; | |
1188 | ||
1189 | parent_ex = &child->parent->ex_dev; | |
1190 | ||
1191 | for (i = 0; i < parent_ex->num_phys; i++) { | |
1192 | struct ex_phy *parent_phy = &parent_ex->ex_phy[i]; | |
1193 | struct ex_phy *child_phy; | |
1194 | ||
1195 | if (parent_phy->phy_state == PHY_VACANT || | |
1196 | parent_phy->phy_state == PHY_NOT_PRESENT) | |
1197 | continue; | |
1198 | ||
1199 | if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr)) | |
1200 | continue; | |
1201 | ||
1202 | child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; | |
1203 | ||
1204 | switch (child->parent->dev_type) { | |
1205 | case EDGE_DEV: | |
1206 | if (child->dev_type == FANOUT_DEV) { | |
1207 | if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || | |
1208 | child_phy->routing_attr != TABLE_ROUTING) { | |
1209 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1210 | res = -ENODEV; | |
1211 | } | |
1212 | } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1213 | if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1214 | res = sas_check_eeds(child, parent_phy, child_phy); | |
1215 | } else if (child_phy->routing_attr != TABLE_ROUTING) { | |
1216 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1217 | res = -ENODEV; | |
1218 | } | |
1219 | } else if (parent_phy->routing_attr == TABLE_ROUTING && | |
1220 | child_phy->routing_attr != SUBTRACTIVE_ROUTING) { | |
1221 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1222 | res = -ENODEV; | |
1223 | } | |
1224 | break; | |
1225 | case FANOUT_DEV: | |
1226 | if (parent_phy->routing_attr != TABLE_ROUTING || | |
1227 | child_phy->routing_attr != SUBTRACTIVE_ROUTING) { | |
1228 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1229 | res = -ENODEV; | |
1230 | } | |
1231 | break; | |
1232 | default: | |
1233 | break; | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | return res; | |
1238 | } | |
1239 | ||
1240 | #define RRI_REQ_SIZE 16 | |
1241 | #define RRI_RESP_SIZE 44 | |
1242 | ||
1243 | static int sas_configure_present(struct domain_device *dev, int phy_id, | |
1244 | u8 *sas_addr, int *index, int *present) | |
1245 | { | |
1246 | int i, res = 0; | |
1247 | struct expander_device *ex = &dev->ex_dev; | |
1248 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
1249 | u8 *rri_req; | |
1250 | u8 *rri_resp; | |
1251 | ||
1252 | *present = 0; | |
1253 | *index = 0; | |
1254 | ||
1255 | rri_req = alloc_smp_req(RRI_REQ_SIZE); | |
1256 | if (!rri_req) | |
1257 | return -ENOMEM; | |
1258 | ||
1259 | rri_resp = alloc_smp_resp(RRI_RESP_SIZE); | |
1260 | if (!rri_resp) { | |
1261 | kfree(rri_req); | |
1262 | return -ENOMEM; | |
1263 | } | |
1264 | ||
1265 | rri_req[1] = SMP_REPORT_ROUTE_INFO; | |
1266 | rri_req[9] = phy_id; | |
1267 | ||
1268 | for (i = 0; i < ex->max_route_indexes ; i++) { | |
1269 | *(__be16 *)(rri_req+6) = cpu_to_be16(i); | |
1270 | res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp, | |
1271 | RRI_RESP_SIZE); | |
1272 | if (res) | |
1273 | goto out; | |
1274 | res = rri_resp[2]; | |
1275 | if (res == SMP_RESP_NO_INDEX) { | |
1276 | SAS_DPRINTK("overflow of indexes: dev %016llx " | |
1277 | "phy 0x%x index 0x%x\n", | |
1278 | SAS_ADDR(dev->sas_addr), phy_id, i); | |
1279 | goto out; | |
1280 | } else if (res != SMP_RESP_FUNC_ACC) { | |
1281 | SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x " | |
cadbd4a5 | 1282 | "result 0x%x\n", __func__, |
2908d778 JB |
1283 | SAS_ADDR(dev->sas_addr), phy_id, i, res); |
1284 | goto out; | |
1285 | } | |
1286 | if (SAS_ADDR(sas_addr) != 0) { | |
1287 | if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) { | |
1288 | *index = i; | |
1289 | if ((rri_resp[12] & 0x80) == 0x80) | |
1290 | *present = 0; | |
1291 | else | |
1292 | *present = 1; | |
1293 | goto out; | |
1294 | } else if (SAS_ADDR(rri_resp+16) == 0) { | |
1295 | *index = i; | |
1296 | *present = 0; | |
1297 | goto out; | |
1298 | } | |
1299 | } else if (SAS_ADDR(rri_resp+16) == 0 && | |
1300 | phy->last_da_index < i) { | |
1301 | phy->last_da_index = i; | |
1302 | *index = i; | |
1303 | *present = 0; | |
1304 | goto out; | |
1305 | } | |
1306 | } | |
1307 | res = -1; | |
1308 | out: | |
1309 | kfree(rri_req); | |
1310 | kfree(rri_resp); | |
1311 | return res; | |
1312 | } | |
1313 | ||
1314 | #define CRI_REQ_SIZE 44 | |
1315 | #define CRI_RESP_SIZE 8 | |
1316 | ||
1317 | static int sas_configure_set(struct domain_device *dev, int phy_id, | |
1318 | u8 *sas_addr, int index, int include) | |
1319 | { | |
1320 | int res; | |
1321 | u8 *cri_req; | |
1322 | u8 *cri_resp; | |
1323 | ||
1324 | cri_req = alloc_smp_req(CRI_REQ_SIZE); | |
1325 | if (!cri_req) | |
1326 | return -ENOMEM; | |
1327 | ||
1328 | cri_resp = alloc_smp_resp(CRI_RESP_SIZE); | |
1329 | if (!cri_resp) { | |
1330 | kfree(cri_req); | |
1331 | return -ENOMEM; | |
1332 | } | |
1333 | ||
1334 | cri_req[1] = SMP_CONF_ROUTE_INFO; | |
1335 | *(__be16 *)(cri_req+6) = cpu_to_be16(index); | |
1336 | cri_req[9] = phy_id; | |
1337 | if (SAS_ADDR(sas_addr) == 0 || !include) | |
1338 | cri_req[12] |= 0x80; | |
1339 | memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE); | |
1340 | ||
1341 | res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp, | |
1342 | CRI_RESP_SIZE); | |
1343 | if (res) | |
1344 | goto out; | |
1345 | res = cri_resp[2]; | |
1346 | if (res == SMP_RESP_NO_INDEX) { | |
1347 | SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x " | |
1348 | "index 0x%x\n", | |
1349 | SAS_ADDR(dev->sas_addr), phy_id, index); | |
1350 | } | |
1351 | out: | |
1352 | kfree(cri_req); | |
1353 | kfree(cri_resp); | |
1354 | return res; | |
1355 | } | |
1356 | ||
1357 | static int sas_configure_phy(struct domain_device *dev, int phy_id, | |
1358 | u8 *sas_addr, int include) | |
1359 | { | |
1360 | int index; | |
1361 | int present; | |
1362 | int res; | |
1363 | ||
1364 | res = sas_configure_present(dev, phy_id, sas_addr, &index, &present); | |
1365 | if (res) | |
1366 | return res; | |
1367 | if (include ^ present) | |
1368 | return sas_configure_set(dev, phy_id, sas_addr, index,include); | |
1369 | ||
1370 | return res; | |
1371 | } | |
1372 | ||
1373 | /** | |
1374 | * sas_configure_parent -- configure routing table of parent | |
1375 | * parent: parent expander | |
1376 | * child: child expander | |
1377 | * sas_addr: SAS port identifier of device directly attached to child | |
1378 | */ | |
1379 | static int sas_configure_parent(struct domain_device *parent, | |
1380 | struct domain_device *child, | |
1381 | u8 *sas_addr, int include) | |
1382 | { | |
1383 | struct expander_device *ex_parent = &parent->ex_dev; | |
1384 | int res = 0; | |
1385 | int i; | |
1386 | ||
1387 | if (parent->parent) { | |
1388 | res = sas_configure_parent(parent->parent, parent, sas_addr, | |
1389 | include); | |
1390 | if (res) | |
1391 | return res; | |
1392 | } | |
1393 | ||
1394 | if (ex_parent->conf_route_table == 0) { | |
1395 | SAS_DPRINTK("ex %016llx has self-configuring routing table\n", | |
1396 | SAS_ADDR(parent->sas_addr)); | |
1397 | return 0; | |
1398 | } | |
1399 | ||
1400 | for (i = 0; i < ex_parent->num_phys; i++) { | |
1401 | struct ex_phy *phy = &ex_parent->ex_phy[i]; | |
1402 | ||
1403 | if ((phy->routing_attr == TABLE_ROUTING) && | |
1404 | (SAS_ADDR(phy->attached_sas_addr) == | |
1405 | SAS_ADDR(child->sas_addr))) { | |
1406 | res = sas_configure_phy(parent, i, sas_addr, include); | |
1407 | if (res) | |
1408 | return res; | |
1409 | } | |
1410 | } | |
1411 | ||
1412 | return res; | |
1413 | } | |
1414 | ||
1415 | /** | |
1416 | * sas_configure_routing -- configure routing | |
1417 | * dev: expander device | |
1418 | * sas_addr: port identifier of device directly attached to the expander device | |
1419 | */ | |
1420 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr) | |
1421 | { | |
1422 | if (dev->parent) | |
1423 | return sas_configure_parent(dev->parent, dev, sas_addr, 1); | |
1424 | return 0; | |
1425 | } | |
1426 | ||
1427 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr) | |
1428 | { | |
1429 | if (dev->parent) | |
1430 | return sas_configure_parent(dev->parent, dev, sas_addr, 0); | |
1431 | return 0; | |
1432 | } | |
1433 | ||
2908d778 JB |
1434 | /** |
1435 | * sas_discover_expander -- expander discovery | |
1436 | * @ex: pointer to expander domain device | |
1437 | * | |
1438 | * See comment in sas_discover_sata(). | |
1439 | */ | |
1440 | static int sas_discover_expander(struct domain_device *dev) | |
1441 | { | |
1442 | int res; | |
1443 | ||
1444 | res = sas_notify_lldd_dev_found(dev); | |
1445 | if (res) | |
1446 | return res; | |
1447 | ||
1448 | res = sas_ex_general(dev); | |
1449 | if (res) | |
1450 | goto out_err; | |
1451 | res = sas_ex_manuf_info(dev); | |
1452 | if (res) | |
1453 | goto out_err; | |
1454 | ||
1455 | res = sas_expander_discover(dev); | |
1456 | if (res) { | |
1457 | SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n", | |
1458 | SAS_ADDR(dev->sas_addr), res); | |
1459 | goto out_err; | |
1460 | } | |
1461 | ||
1462 | sas_check_ex_subtractive_boundary(dev); | |
1463 | res = sas_check_parent_topology(dev); | |
1464 | if (res) | |
1465 | goto out_err; | |
1466 | return 0; | |
1467 | out_err: | |
1468 | sas_notify_lldd_dev_gone(dev); | |
1469 | return res; | |
1470 | } | |
1471 | ||
1472 | static int sas_ex_level_discovery(struct asd_sas_port *port, const int level) | |
1473 | { | |
1474 | int res = 0; | |
1475 | struct domain_device *dev; | |
1476 | ||
1477 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
1478 | if (dev->dev_type == EDGE_DEV || | |
1479 | dev->dev_type == FANOUT_DEV) { | |
1480 | struct sas_expander_device *ex = | |
1481 | rphy_to_expander_device(dev->rphy); | |
1482 | ||
1483 | if (level == ex->level) | |
1484 | res = sas_ex_discover_devices(dev, -1); | |
1485 | else if (level > 0) | |
1486 | res = sas_ex_discover_devices(port->port_dev, -1); | |
1487 | ||
1488 | } | |
1489 | } | |
1490 | ||
1491 | return res; | |
1492 | } | |
1493 | ||
1494 | static int sas_ex_bfs_disc(struct asd_sas_port *port) | |
1495 | { | |
1496 | int res; | |
1497 | int level; | |
1498 | ||
1499 | do { | |
1500 | level = port->disc.max_level; | |
1501 | res = sas_ex_level_discovery(port, level); | |
1502 | mb(); | |
1503 | } while (level < port->disc.max_level); | |
1504 | ||
1505 | return res; | |
1506 | } | |
1507 | ||
1508 | int sas_discover_root_expander(struct domain_device *dev) | |
1509 | { | |
1510 | int res; | |
1511 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); | |
1512 | ||
bf451207 DW |
1513 | res = sas_rphy_add(dev->rphy); |
1514 | if (res) | |
1515 | goto out_err; | |
2908d778 JB |
1516 | |
1517 | ex->level = dev->port->disc.max_level; /* 0 */ | |
1518 | res = sas_discover_expander(dev); | |
bf451207 DW |
1519 | if (res) |
1520 | goto out_err2; | |
1521 | ||
1522 | sas_ex_bfs_disc(dev->port); | |
2908d778 JB |
1523 | |
1524 | return res; | |
bf451207 DW |
1525 | |
1526 | out_err2: | |
6f63caae | 1527 | sas_rphy_remove(dev->rphy); |
bf451207 | 1528 | out_err: |
bf451207 | 1529 | return res; |
2908d778 JB |
1530 | } |
1531 | ||
1532 | /* ---------- Domain revalidation ---------- */ | |
1533 | ||
1534 | static int sas_get_phy_discover(struct domain_device *dev, | |
1535 | int phy_id, struct smp_resp *disc_resp) | |
1536 | { | |
1537 | int res; | |
1538 | u8 *disc_req; | |
1539 | ||
1540 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); | |
1541 | if (!disc_req) | |
1542 | return -ENOMEM; | |
1543 | ||
1544 | disc_req[1] = SMP_DISCOVER; | |
1545 | disc_req[9] = phy_id; | |
1546 | ||
1547 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, | |
1548 | disc_resp, DISCOVER_RESP_SIZE); | |
1549 | if (res) | |
1550 | goto out; | |
1551 | else if (disc_resp->result != SMP_RESP_FUNC_ACC) { | |
1552 | res = disc_resp->result; | |
1553 | goto out; | |
1554 | } | |
1555 | out: | |
1556 | kfree(disc_req); | |
1557 | return res; | |
1558 | } | |
1559 | ||
1560 | static int sas_get_phy_change_count(struct domain_device *dev, | |
1561 | int phy_id, int *pcc) | |
1562 | { | |
1563 | int res; | |
1564 | struct smp_resp *disc_resp; | |
1565 | ||
1566 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); | |
1567 | if (!disc_resp) | |
1568 | return -ENOMEM; | |
1569 | ||
1570 | res = sas_get_phy_discover(dev, phy_id, disc_resp); | |
1571 | if (!res) | |
1572 | *pcc = disc_resp->disc.change_count; | |
1573 | ||
1574 | kfree(disc_resp); | |
1575 | return res; | |
1576 | } | |
1577 | ||
1578 | static int sas_get_phy_attached_sas_addr(struct domain_device *dev, | |
1579 | int phy_id, u8 *attached_sas_addr) | |
1580 | { | |
1581 | int res; | |
1582 | struct smp_resp *disc_resp; | |
1583 | struct discover_resp *dr; | |
1584 | ||
1585 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); | |
1586 | if (!disc_resp) | |
1587 | return -ENOMEM; | |
1588 | dr = &disc_resp->disc; | |
1589 | ||
1590 | res = sas_get_phy_discover(dev, phy_id, disc_resp); | |
1591 | if (!res) { | |
1592 | memcpy(attached_sas_addr,disc_resp->disc.attached_sas_addr,8); | |
1593 | if (dr->attached_dev_type == 0) | |
1594 | memset(attached_sas_addr, 0, 8); | |
1595 | } | |
1596 | kfree(disc_resp); | |
1597 | return res; | |
1598 | } | |
1599 | ||
1600 | static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id, | |
1601 | int from_phy) | |
1602 | { | |
1603 | struct expander_device *ex = &dev->ex_dev; | |
1604 | int res = 0; | |
1605 | int i; | |
1606 | ||
1607 | for (i = from_phy; i < ex->num_phys; i++) { | |
1608 | int phy_change_count = 0; | |
1609 | ||
1610 | res = sas_get_phy_change_count(dev, i, &phy_change_count); | |
1611 | if (res) | |
1612 | goto out; | |
1613 | else if (phy_change_count != ex->ex_phy[i].phy_change_count) { | |
1614 | ex->ex_phy[i].phy_change_count = phy_change_count; | |
1615 | *phy_id = i; | |
1616 | return 0; | |
1617 | } | |
1618 | } | |
1619 | out: | |
1620 | return res; | |
1621 | } | |
1622 | ||
1623 | static int sas_get_ex_change_count(struct domain_device *dev, int *ecc) | |
1624 | { | |
1625 | int res; | |
1626 | u8 *rg_req; | |
1627 | struct smp_resp *rg_resp; | |
1628 | ||
1629 | rg_req = alloc_smp_req(RG_REQ_SIZE); | |
1630 | if (!rg_req) | |
1631 | return -ENOMEM; | |
1632 | ||
1633 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); | |
1634 | if (!rg_resp) { | |
1635 | kfree(rg_req); | |
1636 | return -ENOMEM; | |
1637 | } | |
1638 | ||
1639 | rg_req[1] = SMP_REPORT_GENERAL; | |
1640 | ||
1641 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, | |
1642 | RG_RESP_SIZE); | |
1643 | if (res) | |
1644 | goto out; | |
1645 | if (rg_resp->result != SMP_RESP_FUNC_ACC) { | |
1646 | res = rg_resp->result; | |
1647 | goto out; | |
1648 | } | |
1649 | ||
1650 | *ecc = be16_to_cpu(rg_resp->rg.change_count); | |
1651 | out: | |
1652 | kfree(rg_resp); | |
1653 | kfree(rg_req); | |
1654 | return res; | |
1655 | } | |
1656 | ||
1657 | static int sas_find_bcast_dev(struct domain_device *dev, | |
1658 | struct domain_device **src_dev) | |
1659 | { | |
1660 | struct expander_device *ex = &dev->ex_dev; | |
1661 | int ex_change_count = -1; | |
1662 | int res; | |
1663 | ||
1664 | res = sas_get_ex_change_count(dev, &ex_change_count); | |
1665 | if (res) | |
1666 | goto out; | |
1667 | if (ex_change_count != -1 && | |
1668 | ex_change_count != ex->ex_change_count) { | |
1669 | *src_dev = dev; | |
1670 | ex->ex_change_count = ex_change_count; | |
1671 | } else { | |
1672 | struct domain_device *ch; | |
1673 | ||
1674 | list_for_each_entry(ch, &ex->children, siblings) { | |
1675 | if (ch->dev_type == EDGE_DEV || | |
1676 | ch->dev_type == FANOUT_DEV) { | |
1677 | res = sas_find_bcast_dev(ch, src_dev); | |
1678 | if (src_dev) | |
1679 | return res; | |
1680 | } | |
1681 | } | |
1682 | } | |
1683 | out: | |
1684 | return res; | |
1685 | } | |
1686 | ||
1687 | static void sas_unregister_ex_tree(struct domain_device *dev) | |
1688 | { | |
1689 | struct expander_device *ex = &dev->ex_dev; | |
1690 | struct domain_device *child, *n; | |
1691 | ||
1692 | list_for_each_entry_safe(child, n, &ex->children, siblings) { | |
1693 | if (child->dev_type == EDGE_DEV || | |
1694 | child->dev_type == FANOUT_DEV) | |
1695 | sas_unregister_ex_tree(child); | |
1696 | else | |
1697 | sas_unregister_dev(child); | |
1698 | } | |
1699 | sas_unregister_dev(dev); | |
1700 | } | |
1701 | ||
1702 | static void sas_unregister_devs_sas_addr(struct domain_device *parent, | |
1703 | int phy_id) | |
1704 | { | |
1705 | struct expander_device *ex_dev = &parent->ex_dev; | |
1706 | struct ex_phy *phy = &ex_dev->ex_phy[phy_id]; | |
1707 | struct domain_device *child, *n; | |
1708 | ||
1709 | list_for_each_entry_safe(child, n, &ex_dev->children, siblings) { | |
1710 | if (SAS_ADDR(child->sas_addr) == | |
1711 | SAS_ADDR(phy->attached_sas_addr)) { | |
1712 | if (child->dev_type == EDGE_DEV || | |
1713 | child->dev_type == FANOUT_DEV) | |
1714 | sas_unregister_ex_tree(child); | |
1715 | else | |
1716 | sas_unregister_dev(child); | |
1717 | break; | |
1718 | } | |
1719 | } | |
1720 | sas_disable_routing(parent, phy->attached_sas_addr); | |
1721 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); | |
1722 | sas_port_delete_phy(phy->port, phy->phy); | |
1723 | if (phy->port->num_phys == 0) | |
1724 | sas_port_delete(phy->port); | |
1725 | phy->port = NULL; | |
1726 | } | |
1727 | ||
1728 | static int sas_discover_bfs_by_root_level(struct domain_device *root, | |
1729 | const int level) | |
1730 | { | |
1731 | struct expander_device *ex_root = &root->ex_dev; | |
1732 | struct domain_device *child; | |
1733 | int res = 0; | |
1734 | ||
1735 | list_for_each_entry(child, &ex_root->children, siblings) { | |
1736 | if (child->dev_type == EDGE_DEV || | |
1737 | child->dev_type == FANOUT_DEV) { | |
1738 | struct sas_expander_device *ex = | |
1739 | rphy_to_expander_device(child->rphy); | |
1740 | ||
1741 | if (level > ex->level) | |
1742 | res = sas_discover_bfs_by_root_level(child, | |
1743 | level); | |
1744 | else if (level == ex->level) | |
1745 | res = sas_ex_discover_devices(child, -1); | |
1746 | } | |
1747 | } | |
1748 | return res; | |
1749 | } | |
1750 | ||
1751 | static int sas_discover_bfs_by_root(struct domain_device *dev) | |
1752 | { | |
1753 | int res; | |
1754 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); | |
1755 | int level = ex->level+1; | |
1756 | ||
1757 | res = sas_ex_discover_devices(dev, -1); | |
1758 | if (res) | |
1759 | goto out; | |
1760 | do { | |
1761 | res = sas_discover_bfs_by_root_level(dev, level); | |
1762 | mb(); | |
1763 | level += 1; | |
1764 | } while (level <= dev->port->disc.max_level); | |
1765 | out: | |
1766 | return res; | |
1767 | } | |
1768 | ||
1769 | static int sas_discover_new(struct domain_device *dev, int phy_id) | |
1770 | { | |
1771 | struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id]; | |
1772 | struct domain_device *child; | |
1773 | int res; | |
1774 | ||
1775 | SAS_DPRINTK("ex %016llx phy%d new device attached\n", | |
1776 | SAS_ADDR(dev->sas_addr), phy_id); | |
1777 | res = sas_ex_phy_discover(dev, phy_id); | |
1778 | if (res) | |
1779 | goto out; | |
1780 | res = sas_ex_discover_devices(dev, phy_id); | |
1781 | if (res) | |
1782 | goto out; | |
1783 | list_for_each_entry(child, &dev->ex_dev.children, siblings) { | |
1784 | if (SAS_ADDR(child->sas_addr) == | |
1785 | SAS_ADDR(ex_phy->attached_sas_addr)) { | |
1786 | if (child->dev_type == EDGE_DEV || | |
1787 | child->dev_type == FANOUT_DEV) | |
1788 | res = sas_discover_bfs_by_root(child); | |
1789 | break; | |
1790 | } | |
1791 | } | |
1792 | out: | |
1793 | return res; | |
1794 | } | |
1795 | ||
1796 | static int sas_rediscover_dev(struct domain_device *dev, int phy_id) | |
1797 | { | |
1798 | struct expander_device *ex = &dev->ex_dev; | |
1799 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
1800 | u8 attached_sas_addr[8]; | |
1801 | int res; | |
1802 | ||
1803 | res = sas_get_phy_attached_sas_addr(dev, phy_id, attached_sas_addr); | |
1804 | switch (res) { | |
1805 | case SMP_RESP_NO_PHY: | |
1806 | phy->phy_state = PHY_NOT_PRESENT; | |
1807 | sas_unregister_devs_sas_addr(dev, phy_id); | |
1808 | goto out; break; | |
1809 | case SMP_RESP_PHY_VACANT: | |
1810 | phy->phy_state = PHY_VACANT; | |
1811 | sas_unregister_devs_sas_addr(dev, phy_id); | |
1812 | goto out; break; | |
1813 | case SMP_RESP_FUNC_ACC: | |
1814 | break; | |
1815 | } | |
1816 | ||
1817 | if (SAS_ADDR(attached_sas_addr) == 0) { | |
1818 | phy->phy_state = PHY_EMPTY; | |
1819 | sas_unregister_devs_sas_addr(dev, phy_id); | |
1820 | } else if (SAS_ADDR(attached_sas_addr) == | |
1821 | SAS_ADDR(phy->attached_sas_addr)) { | |
1822 | SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n", | |
1823 | SAS_ADDR(dev->sas_addr), phy_id); | |
a01e70e5 | 1824 | sas_ex_phy_discover(dev, phy_id); |
2908d778 JB |
1825 | } else |
1826 | res = sas_discover_new(dev, phy_id); | |
1827 | out: | |
1828 | return res; | |
1829 | } | |
1830 | ||
1831 | static int sas_rediscover(struct domain_device *dev, const int phy_id) | |
1832 | { | |
1833 | struct expander_device *ex = &dev->ex_dev; | |
1834 | struct ex_phy *changed_phy = &ex->ex_phy[phy_id]; | |
1835 | int res = 0; | |
1836 | int i; | |
1837 | ||
1838 | SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n", | |
1839 | SAS_ADDR(dev->sas_addr), phy_id); | |
1840 | ||
1841 | if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) { | |
1842 | for (i = 0; i < ex->num_phys; i++) { | |
1843 | struct ex_phy *phy = &ex->ex_phy[i]; | |
1844 | ||
1845 | if (i == phy_id) | |
1846 | continue; | |
1847 | if (SAS_ADDR(phy->attached_sas_addr) == | |
1848 | SAS_ADDR(changed_phy->attached_sas_addr)) { | |
1849 | SAS_DPRINTK("phy%d part of wide port with " | |
1850 | "phy%d\n", phy_id, i); | |
1851 | goto out; | |
1852 | } | |
1853 | } | |
1854 | res = sas_rediscover_dev(dev, phy_id); | |
1855 | } else | |
1856 | res = sas_discover_new(dev, phy_id); | |
1857 | out: | |
1858 | return res; | |
1859 | } | |
1860 | ||
1861 | /** | |
1862 | * sas_revalidate_domain -- revalidate the domain | |
1863 | * @port: port to the domain of interest | |
1864 | * | |
1865 | * NOTE: this process _must_ quit (return) as soon as any connection | |
1866 | * errors are encountered. Connection recovery is done elsewhere. | |
1867 | * Discover process only interrogates devices in order to discover the | |
1868 | * domain. | |
1869 | */ | |
1870 | int sas_ex_revalidate_domain(struct domain_device *port_dev) | |
1871 | { | |
1872 | int res; | |
1873 | struct domain_device *dev = NULL; | |
1874 | ||
1875 | res = sas_find_bcast_dev(port_dev, &dev); | |
1876 | if (res) | |
1877 | goto out; | |
1878 | if (dev) { | |
1879 | struct expander_device *ex = &dev->ex_dev; | |
1880 | int i = 0, phy_id; | |
1881 | ||
1882 | do { | |
1883 | phy_id = -1; | |
1884 | res = sas_find_bcast_phy(dev, &phy_id, i); | |
1885 | if (phy_id == -1) | |
1886 | break; | |
1887 | res = sas_rediscover(dev, phy_id); | |
1888 | i = phy_id + 1; | |
1889 | } while (i < ex->num_phys); | |
1890 | } | |
1891 | out: | |
1892 | return res; | |
1893 | } | |
1894 | ||
ba1fc175 FT |
1895 | int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, |
1896 | struct request *req) | |
1897 | { | |
1898 | struct domain_device *dev; | |
2cd614c8 | 1899 | int ret, type; |
ba1fc175 FT |
1900 | struct request *rsp = req->next_rq; |
1901 | ||
1902 | if (!rsp) { | |
1903 | printk("%s: space for a smp response is missing\n", | |
cadbd4a5 | 1904 | __func__); |
ba1fc175 FT |
1905 | return -EINVAL; |
1906 | } | |
1907 | ||
2cd614c8 | 1908 | /* no rphy means no smp target support (ie aic94xx host) */ |
b98e66fa JB |
1909 | if (!rphy) |
1910 | return sas_smp_host_handler(shost, req, rsp); | |
1911 | ||
2cd614c8 | 1912 | type = rphy->identify.device_type; |
ba1fc175 FT |
1913 | |
1914 | if (type != SAS_EDGE_EXPANDER_DEVICE && | |
1915 | type != SAS_FANOUT_EXPANDER_DEVICE) { | |
1916 | printk("%s: can we send a smp request to a device?\n", | |
cadbd4a5 | 1917 | __func__); |
ba1fc175 FT |
1918 | return -EINVAL; |
1919 | } | |
1920 | ||
1921 | dev = sas_find_dev_by_rphy(rphy); | |
1922 | if (!dev) { | |
cadbd4a5 | 1923 | printk("%s: fail to find a domain_device?\n", __func__); |
ba1fc175 FT |
1924 | return -EINVAL; |
1925 | } | |
1926 | ||
1927 | /* do we need to support multiple segments? */ | |
1928 | if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) { | |
1929 | printk("%s: multiple segments req %u %u, rsp %u %u\n", | |
cadbd4a5 | 1930 | __func__, req->bio->bi_vcnt, req->data_len, |
ba1fc175 FT |
1931 | rsp->bio->bi_vcnt, rsp->data_len); |
1932 | return -EINVAL; | |
1933 | } | |
1934 | ||
1935 | ret = smp_execute_task(dev, bio_data(req->bio), req->data_len, | |
1936 | bio_data(rsp->bio), rsp->data_len); | |
2d4b63e1 JB |
1937 | if (ret > 0) { |
1938 | /* positive number is the untransferred residual */ | |
1939 | rsp->data_len = ret; | |
1940 | req->data_len = 0; | |
1941 | ret = 0; | |
1942 | } else if (ret == 0) { | |
1943 | rsp->data_len = 0; | |
1944 | req->data_len = 0; | |
1945 | } | |
ba1fc175 FT |
1946 | |
1947 | return ret; | |
1948 | } |