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 JB |
25 | #include <linux/scatterlist.h> |
26 | ||
27 | #include "sas_internal.h" | |
28 | ||
29 | #include <scsi/scsi_transport.h> | |
30 | #include <scsi/scsi_transport_sas.h> | |
31 | #include "../scsi_sas_internal.h" | |
32 | ||
33 | static int sas_discover_expander(struct domain_device *dev); | |
34 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr); | |
35 | static int sas_configure_phy(struct domain_device *dev, int phy_id, | |
36 | u8 *sas_addr, int include); | |
37 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr); | |
38 | ||
39 | #if 0 | |
40 | /* FIXME: smp needs to migrate into the sas class */ | |
91a69029 ZR |
41 | static ssize_t smp_portal_read(struct kobject *, struct bin_attribute *, |
42 | char *, loff_t, size_t); | |
43 | static ssize_t smp_portal_write(struct kobject *, struct bin_attribute *, | |
44 | char *, loff_t, size_t); | |
2908d778 JB |
45 | #endif |
46 | ||
47 | /* ---------- SMP task management ---------- */ | |
48 | ||
49 | static void smp_task_timedout(unsigned long _task) | |
50 | { | |
51 | struct sas_task *task = (void *) _task; | |
52 | unsigned long flags; | |
53 | ||
54 | spin_lock_irqsave(&task->task_state_lock, flags); | |
55 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
56 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
57 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
58 | ||
59 | complete(&task->completion); | |
60 | } | |
61 | ||
62 | static void smp_task_done(struct sas_task *task) | |
63 | { | |
64 | if (!del_timer(&task->timer)) | |
65 | return; | |
66 | complete(&task->completion); | |
67 | } | |
68 | ||
69 | /* Give it some long enough timeout. In seconds. */ | |
70 | #define SMP_TIMEOUT 10 | |
71 | ||
72 | static int smp_execute_task(struct domain_device *dev, void *req, int req_size, | |
73 | void *resp, int resp_size) | |
74 | { | |
42961ee8 | 75 | int res, retry; |
76 | struct sas_task *task = NULL; | |
2908d778 JB |
77 | struct sas_internal *i = |
78 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
79 | ||
42961ee8 | 80 | for (retry = 0; retry < 3; retry++) { |
81 | task = sas_alloc_task(GFP_KERNEL); | |
82 | if (!task) | |
83 | return -ENOMEM; | |
2908d778 | 84 | |
42961ee8 | 85 | task->dev = dev; |
86 | task->task_proto = dev->tproto; | |
87 | sg_init_one(&task->smp_task.smp_req, req, req_size); | |
88 | sg_init_one(&task->smp_task.smp_resp, resp, resp_size); | |
2908d778 | 89 | |
42961ee8 | 90 | task->task_done = smp_task_done; |
2908d778 | 91 | |
42961ee8 | 92 | task->timer.data = (unsigned long) task; |
93 | task->timer.function = smp_task_timedout; | |
94 | task->timer.expires = jiffies + SMP_TIMEOUT*HZ; | |
95 | add_timer(&task->timer); | |
2908d778 | 96 | |
42961ee8 | 97 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); |
2908d778 | 98 | |
42961ee8 | 99 | if (res) { |
100 | del_timer(&task->timer); | |
101 | SAS_DPRINTK("executing SMP task failed:%d\n", res); | |
2908d778 JB |
102 | goto ex_err; |
103 | } | |
42961ee8 | 104 | |
105 | wait_for_completion(&task->completion); | |
106 | res = -ETASK; | |
107 | if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { | |
108 | SAS_DPRINTK("smp task timed out or aborted\n"); | |
109 | i->dft->lldd_abort_task(task); | |
110 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { | |
111 | SAS_DPRINTK("SMP task aborted and not done\n"); | |
112 | goto ex_err; | |
113 | } | |
114 | } | |
115 | if (task->task_status.resp == SAS_TASK_COMPLETE && | |
116 | task->task_status.stat == SAM_GOOD) { | |
117 | res = 0; | |
118 | break; | |
119 | } else { | |
120 | SAS_DPRINTK("%s: task to dev %016llx response: 0x%x " | |
121 | "status 0x%x\n", __FUNCTION__, | |
122 | SAS_ADDR(dev->sas_addr), | |
123 | task->task_status.resp, | |
124 | task->task_status.stat); | |
125 | sas_free_task(task); | |
126 | task = NULL; | |
127 | } | |
2908d778 | 128 | } |
2908d778 | 129 | ex_err: |
42961ee8 | 130 | BUG_ON(retry == 3 && task != NULL); |
131 | if (task != NULL) { | |
132 | sas_free_task(task); | |
133 | } | |
2908d778 JB |
134 | return res; |
135 | } | |
136 | ||
137 | /* ---------- Allocations ---------- */ | |
138 | ||
139 | static inline void *alloc_smp_req(int size) | |
140 | { | |
141 | u8 *p = kzalloc(size, GFP_KERNEL); | |
142 | if (p) | |
143 | p[0] = SMP_REQUEST; | |
144 | return p; | |
145 | } | |
146 | ||
147 | static inline void *alloc_smp_resp(int size) | |
148 | { | |
149 | return kzalloc(size, GFP_KERNEL); | |
150 | } | |
151 | ||
152 | /* ---------- Expander configuration ---------- */ | |
153 | ||
154 | static void sas_set_ex_phy(struct domain_device *dev, int phy_id, | |
155 | void *disc_resp) | |
156 | { | |
157 | struct expander_device *ex = &dev->ex_dev; | |
158 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
159 | struct smp_resp *resp = disc_resp; | |
160 | struct discover_resp *dr = &resp->disc; | |
161 | struct sas_rphy *rphy = dev->rphy; | |
162 | int rediscover = (phy->phy != NULL); | |
163 | ||
164 | if (!rediscover) { | |
165 | phy->phy = sas_phy_alloc(&rphy->dev, phy_id); | |
166 | ||
167 | /* FIXME: error_handling */ | |
168 | BUG_ON(!phy->phy); | |
169 | } | |
170 | ||
171 | switch (resp->result) { | |
172 | case SMP_RESP_PHY_VACANT: | |
173 | phy->phy_state = PHY_VACANT; | |
174 | return; | |
175 | default: | |
176 | phy->phy_state = PHY_NOT_PRESENT; | |
177 | return; | |
178 | case SMP_RESP_FUNC_ACC: | |
179 | phy->phy_state = PHY_EMPTY; /* do not know yet */ | |
180 | break; | |
181 | } | |
182 | ||
183 | phy->phy_id = phy_id; | |
184 | phy->attached_dev_type = dr->attached_dev_type; | |
185 | phy->linkrate = dr->linkrate; | |
186 | phy->attached_sata_host = dr->attached_sata_host; | |
187 | phy->attached_sata_dev = dr->attached_sata_dev; | |
188 | phy->attached_sata_ps = dr->attached_sata_ps; | |
189 | phy->attached_iproto = dr->iproto << 1; | |
190 | phy->attached_tproto = dr->tproto << 1; | |
191 | memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE); | |
192 | phy->attached_phy_id = dr->attached_phy_id; | |
193 | phy->phy_change_count = dr->change_count; | |
194 | phy->routing_attr = dr->routing_attr; | |
195 | phy->virtual = dr->virtual; | |
196 | phy->last_da_index = -1; | |
197 | ||
198 | phy->phy->identify.initiator_port_protocols = phy->attached_iproto; | |
199 | phy->phy->identify.target_port_protocols = phy->attached_tproto; | |
200 | phy->phy->identify.phy_identifier = phy_id; | |
a01e70e5 JB |
201 | phy->phy->minimum_linkrate_hw = dr->hmin_linkrate; |
202 | phy->phy->maximum_linkrate_hw = dr->hmax_linkrate; | |
203 | phy->phy->minimum_linkrate = dr->pmin_linkrate; | |
204 | phy->phy->maximum_linkrate = dr->pmax_linkrate; | |
88edf746 | 205 | phy->phy->negotiated_linkrate = phy->linkrate; |
2908d778 JB |
206 | |
207 | if (!rediscover) | |
208 | sas_phy_add(phy->phy); | |
209 | ||
210 | SAS_DPRINTK("ex %016llx phy%02d:%c attached: %016llx\n", | |
211 | SAS_ADDR(dev->sas_addr), phy->phy_id, | |
212 | phy->routing_attr == TABLE_ROUTING ? 'T' : | |
213 | phy->routing_attr == DIRECT_ROUTING ? 'D' : | |
214 | phy->routing_attr == SUBTRACTIVE_ROUTING ? 'S' : '?', | |
215 | SAS_ADDR(phy->attached_sas_addr)); | |
216 | ||
217 | return; | |
218 | } | |
219 | ||
220 | #define DISCOVER_REQ_SIZE 16 | |
221 | #define DISCOVER_RESP_SIZE 56 | |
222 | ||
1acce194 JB |
223 | static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req, |
224 | u8 *disc_resp, int single) | |
225 | { | |
226 | int i, res; | |
227 | ||
228 | disc_req[9] = single; | |
229 | for (i = 1 ; i < 3; i++) { | |
230 | struct discover_resp *dr; | |
231 | ||
232 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, | |
233 | disc_resp, DISCOVER_RESP_SIZE); | |
234 | if (res) | |
235 | return res; | |
236 | /* This is detecting a failure to transmit inital | |
237 | * dev to host FIS as described in section G.5 of | |
238 | * sas-2 r 04b */ | |
239 | dr = &((struct smp_resp *)disc_resp)->disc; | |
240 | if (!(dr->attached_dev_type == 0 && | |
241 | dr->attached_sata_dev)) | |
242 | break; | |
243 | /* In order to generate the dev to host FIS, we | |
244 | * send a link reset to the expander port */ | |
38e2f035 | 245 | sas_smp_phy_control(dev, single, PHY_FUNC_LINK_RESET, NULL); |
1acce194 JB |
246 | /* Wait for the reset to trigger the negotiation */ |
247 | msleep(500); | |
248 | } | |
249 | sas_set_ex_phy(dev, single, disc_resp); | |
250 | return 0; | |
251 | } | |
252 | ||
2908d778 JB |
253 | static int sas_ex_phy_discover(struct domain_device *dev, int single) |
254 | { | |
255 | struct expander_device *ex = &dev->ex_dev; | |
256 | int res = 0; | |
257 | u8 *disc_req; | |
258 | u8 *disc_resp; | |
259 | ||
260 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); | |
261 | if (!disc_req) | |
262 | return -ENOMEM; | |
263 | ||
264 | disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE); | |
265 | if (!disc_resp) { | |
266 | kfree(disc_req); | |
267 | return -ENOMEM; | |
268 | } | |
269 | ||
270 | disc_req[1] = SMP_DISCOVER; | |
271 | ||
272 | if (0 <= single && single < ex->num_phys) { | |
1acce194 | 273 | res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single); |
2908d778 JB |
274 | } else { |
275 | int i; | |
276 | ||
277 | for (i = 0; i < ex->num_phys; i++) { | |
1acce194 JB |
278 | res = sas_ex_phy_discover_helper(dev, disc_req, |
279 | disc_resp, i); | |
2908d778 JB |
280 | if (res) |
281 | goto out_err; | |
2908d778 JB |
282 | } |
283 | } | |
284 | out_err: | |
285 | kfree(disc_resp); | |
286 | kfree(disc_req); | |
287 | return res; | |
288 | } | |
289 | ||
290 | static int sas_expander_discover(struct domain_device *dev) | |
291 | { | |
292 | struct expander_device *ex = &dev->ex_dev; | |
293 | int res = -ENOMEM; | |
294 | ||
295 | ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL); | |
296 | if (!ex->ex_phy) | |
297 | return -ENOMEM; | |
298 | ||
299 | res = sas_ex_phy_discover(dev, -1); | |
300 | if (res) | |
301 | goto out_err; | |
302 | ||
303 | return 0; | |
304 | out_err: | |
305 | kfree(ex->ex_phy); | |
306 | ex->ex_phy = NULL; | |
307 | return res; | |
308 | } | |
309 | ||
310 | #define MAX_EXPANDER_PHYS 128 | |
311 | ||
312 | static void ex_assign_report_general(struct domain_device *dev, | |
313 | struct smp_resp *resp) | |
314 | { | |
315 | struct report_general_resp *rg = &resp->rg; | |
316 | ||
317 | dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count); | |
318 | dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes); | |
319 | dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS); | |
320 | dev->ex_dev.conf_route_table = rg->conf_route_table; | |
321 | dev->ex_dev.configuring = rg->configuring; | |
322 | memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8); | |
323 | } | |
324 | ||
325 | #define RG_REQ_SIZE 8 | |
326 | #define RG_RESP_SIZE 32 | |
327 | ||
328 | static int sas_ex_general(struct domain_device *dev) | |
329 | { | |
330 | u8 *rg_req; | |
331 | struct smp_resp *rg_resp; | |
332 | int res; | |
333 | int i; | |
334 | ||
335 | rg_req = alloc_smp_req(RG_REQ_SIZE); | |
336 | if (!rg_req) | |
337 | return -ENOMEM; | |
338 | ||
339 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); | |
340 | if (!rg_resp) { | |
341 | kfree(rg_req); | |
342 | return -ENOMEM; | |
343 | } | |
344 | ||
345 | rg_req[1] = SMP_REPORT_GENERAL; | |
346 | ||
347 | for (i = 0; i < 5; i++) { | |
348 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, | |
349 | RG_RESP_SIZE); | |
350 | ||
351 | if (res) { | |
352 | SAS_DPRINTK("RG to ex %016llx failed:0x%x\n", | |
353 | SAS_ADDR(dev->sas_addr), res); | |
354 | goto out; | |
355 | } else if (rg_resp->result != SMP_RESP_FUNC_ACC) { | |
356 | SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n", | |
357 | SAS_ADDR(dev->sas_addr), rg_resp->result); | |
358 | res = rg_resp->result; | |
359 | goto out; | |
360 | } | |
361 | ||
362 | ex_assign_report_general(dev, rg_resp); | |
363 | ||
364 | if (dev->ex_dev.configuring) { | |
365 | SAS_DPRINTK("RG: ex %llx self-configuring...\n", | |
366 | SAS_ADDR(dev->sas_addr)); | |
367 | schedule_timeout_interruptible(5*HZ); | |
368 | } else | |
369 | break; | |
370 | } | |
371 | out: | |
372 | kfree(rg_req); | |
373 | kfree(rg_resp); | |
374 | return res; | |
375 | } | |
376 | ||
377 | static void ex_assign_manuf_info(struct domain_device *dev, void | |
378 | *_mi_resp) | |
379 | { | |
380 | u8 *mi_resp = _mi_resp; | |
381 | struct sas_rphy *rphy = dev->rphy; | |
382 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); | |
383 | ||
384 | memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN); | |
385 | memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN); | |
386 | memcpy(edev->product_rev, mi_resp + 36, | |
387 | SAS_EXPANDER_PRODUCT_REV_LEN); | |
388 | ||
389 | if (mi_resp[8] & 1) { | |
390 | memcpy(edev->component_vendor_id, mi_resp + 40, | |
391 | SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN); | |
392 | edev->component_id = mi_resp[48] << 8 | mi_resp[49]; | |
393 | edev->component_revision_id = mi_resp[50]; | |
394 | } | |
395 | } | |
396 | ||
397 | #define MI_REQ_SIZE 8 | |
398 | #define MI_RESP_SIZE 64 | |
399 | ||
400 | static int sas_ex_manuf_info(struct domain_device *dev) | |
401 | { | |
402 | u8 *mi_req; | |
403 | u8 *mi_resp; | |
404 | int res; | |
405 | ||
406 | mi_req = alloc_smp_req(MI_REQ_SIZE); | |
407 | if (!mi_req) | |
408 | return -ENOMEM; | |
409 | ||
410 | mi_resp = alloc_smp_resp(MI_RESP_SIZE); | |
411 | if (!mi_resp) { | |
412 | kfree(mi_req); | |
413 | return -ENOMEM; | |
414 | } | |
415 | ||
416 | mi_req[1] = SMP_REPORT_MANUF_INFO; | |
417 | ||
418 | res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE); | |
419 | if (res) { | |
420 | SAS_DPRINTK("MI: ex %016llx failed:0x%x\n", | |
421 | SAS_ADDR(dev->sas_addr), res); | |
422 | goto out; | |
423 | } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) { | |
424 | SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n", | |
425 | SAS_ADDR(dev->sas_addr), mi_resp[2]); | |
426 | goto out; | |
427 | } | |
428 | ||
429 | ex_assign_manuf_info(dev, mi_resp); | |
430 | out: | |
431 | kfree(mi_req); | |
432 | kfree(mi_resp); | |
433 | return res; | |
434 | } | |
435 | ||
436 | #define PC_REQ_SIZE 44 | |
437 | #define PC_RESP_SIZE 8 | |
438 | ||
439 | int sas_smp_phy_control(struct domain_device *dev, int phy_id, | |
a01e70e5 JB |
440 | enum phy_func phy_func, |
441 | struct sas_phy_linkrates *rates) | |
2908d778 JB |
442 | { |
443 | u8 *pc_req; | |
444 | u8 *pc_resp; | |
445 | int res; | |
446 | ||
447 | pc_req = alloc_smp_req(PC_REQ_SIZE); | |
448 | if (!pc_req) | |
449 | return -ENOMEM; | |
450 | ||
451 | pc_resp = alloc_smp_resp(PC_RESP_SIZE); | |
452 | if (!pc_resp) { | |
453 | kfree(pc_req); | |
454 | return -ENOMEM; | |
455 | } | |
456 | ||
457 | pc_req[1] = SMP_PHY_CONTROL; | |
458 | pc_req[9] = phy_id; | |
459 | pc_req[10]= phy_func; | |
a01e70e5 JB |
460 | if (rates) { |
461 | pc_req[32] = rates->minimum_linkrate << 4; | |
462 | pc_req[33] = rates->maximum_linkrate << 4; | |
463 | } | |
2908d778 JB |
464 | |
465 | res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE); | |
466 | ||
467 | kfree(pc_resp); | |
468 | kfree(pc_req); | |
469 | return res; | |
470 | } | |
471 | ||
472 | static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) | |
473 | { | |
474 | struct expander_device *ex = &dev->ex_dev; | |
475 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
476 | ||
a01e70e5 | 477 | sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL); |
88edf746 | 478 | phy->linkrate = SAS_PHY_DISABLED; |
2908d778 JB |
479 | } |
480 | ||
481 | static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr) | |
482 | { | |
483 | struct expander_device *ex = &dev->ex_dev; | |
484 | int i; | |
485 | ||
486 | for (i = 0; i < ex->num_phys; i++) { | |
487 | struct ex_phy *phy = &ex->ex_phy[i]; | |
488 | ||
489 | if (phy->phy_state == PHY_VACANT || | |
490 | phy->phy_state == PHY_NOT_PRESENT) | |
491 | continue; | |
492 | ||
493 | if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr)) | |
494 | sas_ex_disable_phy(dev, i); | |
495 | } | |
496 | } | |
497 | ||
498 | static int sas_dev_present_in_domain(struct asd_sas_port *port, | |
499 | u8 *sas_addr) | |
500 | { | |
501 | struct domain_device *dev; | |
502 | ||
503 | if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr)) | |
504 | return 1; | |
505 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
506 | if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr)) | |
507 | return 1; | |
508 | } | |
509 | return 0; | |
510 | } | |
511 | ||
512 | #define RPEL_REQ_SIZE 16 | |
513 | #define RPEL_RESP_SIZE 32 | |
514 | int sas_smp_get_phy_events(struct sas_phy *phy) | |
515 | { | |
516 | int res; | |
517 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); | |
518 | struct domain_device *dev = sas_find_dev_by_rphy(rphy); | |
519 | u8 *req = alloc_smp_req(RPEL_REQ_SIZE); | |
520 | u8 *resp = kzalloc(RPEL_RESP_SIZE, GFP_KERNEL); | |
521 | ||
522 | if (!resp) | |
523 | return -ENOMEM; | |
524 | ||
525 | req[1] = SMP_REPORT_PHY_ERR_LOG; | |
526 | req[9] = phy->number; | |
527 | ||
528 | res = smp_execute_task(dev, req, RPEL_REQ_SIZE, | |
529 | resp, RPEL_RESP_SIZE); | |
530 | ||
531 | if (!res) | |
532 | goto out; | |
533 | ||
534 | phy->invalid_dword_count = scsi_to_u32(&resp[12]); | |
535 | phy->running_disparity_error_count = scsi_to_u32(&resp[16]); | |
536 | phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]); | |
537 | phy->phy_reset_problem_count = scsi_to_u32(&resp[24]); | |
538 | ||
539 | out: | |
540 | kfree(resp); | |
541 | return res; | |
542 | ||
543 | } | |
544 | ||
545 | #define RPS_REQ_SIZE 16 | |
546 | #define RPS_RESP_SIZE 60 | |
547 | ||
548 | static int sas_get_report_phy_sata(struct domain_device *dev, | |
549 | int phy_id, | |
550 | struct smp_resp *rps_resp) | |
551 | { | |
552 | int res; | |
553 | u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE); | |
1acce194 | 554 | u8 *resp = (u8 *)rps_resp; |
2908d778 JB |
555 | |
556 | if (!rps_req) | |
557 | return -ENOMEM; | |
558 | ||
559 | rps_req[1] = SMP_REPORT_PHY_SATA; | |
560 | rps_req[9] = phy_id; | |
561 | ||
562 | res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE, | |
563 | rps_resp, RPS_RESP_SIZE); | |
564 | ||
1acce194 JB |
565 | /* 0x34 is the FIS type for the D2H fis. There's a potential |
566 | * standards cockup here. sas-2 explicitly specifies the FIS | |
567 | * should be encoded so that FIS type is in resp[24]. | |
568 | * However, some expanders endian reverse this. Undo the | |
569 | * reversal here */ | |
570 | if (!res && resp[27] == 0x34 && resp[24] != 0x34) { | |
571 | int i; | |
572 | ||
573 | for (i = 0; i < 5; i++) { | |
574 | int j = 24 + (i*4); | |
575 | u8 a, b; | |
576 | a = resp[j + 0]; | |
577 | b = resp[j + 1]; | |
578 | resp[j + 0] = resp[j + 3]; | |
579 | resp[j + 1] = resp[j + 2]; | |
580 | resp[j + 2] = b; | |
581 | resp[j + 3] = a; | |
582 | } | |
583 | } | |
584 | ||
2908d778 | 585 | kfree(rps_req); |
1acce194 | 586 | return res; |
2908d778 JB |
587 | } |
588 | ||
589 | static void sas_ex_get_linkrate(struct domain_device *parent, | |
590 | struct domain_device *child, | |
591 | struct ex_phy *parent_phy) | |
592 | { | |
593 | struct expander_device *parent_ex = &parent->ex_dev; | |
594 | struct sas_port *port; | |
595 | int i; | |
596 | ||
597 | child->pathways = 0; | |
598 | ||
599 | port = parent_phy->port; | |
600 | ||
601 | for (i = 0; i < parent_ex->num_phys; i++) { | |
602 | struct ex_phy *phy = &parent_ex->ex_phy[i]; | |
603 | ||
604 | if (phy->phy_state == PHY_VACANT || | |
605 | phy->phy_state == PHY_NOT_PRESENT) | |
606 | continue; | |
607 | ||
608 | if (SAS_ADDR(phy->attached_sas_addr) == | |
609 | SAS_ADDR(child->sas_addr)) { | |
610 | ||
611 | child->min_linkrate = min(parent->min_linkrate, | |
612 | phy->linkrate); | |
613 | child->max_linkrate = max(parent->max_linkrate, | |
614 | phy->linkrate); | |
615 | child->pathways++; | |
616 | sas_port_add_phy(port, phy->phy); | |
617 | } | |
618 | } | |
619 | child->linkrate = min(parent_phy->linkrate, child->max_linkrate); | |
620 | child->pathways = min(child->pathways, parent->pathways); | |
621 | } | |
622 | ||
623 | static struct domain_device *sas_ex_discover_end_dev( | |
624 | struct domain_device *parent, int phy_id) | |
625 | { | |
626 | struct expander_device *parent_ex = &parent->ex_dev; | |
627 | struct ex_phy *phy = &parent_ex->ex_phy[phy_id]; | |
628 | struct domain_device *child = NULL; | |
629 | struct sas_rphy *rphy; | |
630 | int res; | |
631 | ||
632 | if (phy->attached_sata_host || phy->attached_sata_ps) | |
633 | return NULL; | |
634 | ||
635 | child = kzalloc(sizeof(*child), GFP_KERNEL); | |
636 | if (!child) | |
637 | return NULL; | |
638 | ||
639 | child->parent = parent; | |
640 | child->port = parent->port; | |
641 | child->iproto = phy->attached_iproto; | |
642 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
643 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); | |
024879ea JB |
644 | if (!phy->port) { |
645 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); | |
646 | if (unlikely(!phy->port)) | |
647 | goto out_err; | |
648 | if (unlikely(sas_port_add(phy->port) != 0)) { | |
649 | sas_port_free(phy->port); | |
650 | goto out_err; | |
651 | } | |
652 | } | |
2908d778 JB |
653 | sas_ex_get_linkrate(parent, child, phy); |
654 | ||
655 | if ((phy->attached_tproto & SAS_PROTO_STP) || phy->attached_sata_dev) { | |
656 | child->dev_type = SATA_DEV; | |
657 | if (phy->attached_tproto & SAS_PROTO_STP) | |
658 | child->tproto = phy->attached_tproto; | |
659 | if (phy->attached_sata_dev) | |
660 | child->tproto |= SATA_DEV; | |
661 | res = sas_get_report_phy_sata(parent, phy_id, | |
662 | &child->sata_dev.rps_resp); | |
663 | if (res) { | |
664 | SAS_DPRINTK("report phy sata to %016llx:0x%x returned " | |
665 | "0x%x\n", SAS_ADDR(parent->sas_addr), | |
666 | phy_id, res); | |
024879ea | 667 | goto out_free; |
2908d778 JB |
668 | } |
669 | memcpy(child->frame_rcvd, &child->sata_dev.rps_resp.rps.fis, | |
670 | sizeof(struct dev_to_host_fis)); | |
1acce194 JB |
671 | |
672 | rphy = sas_end_device_alloc(phy->port); | |
673 | /* FIXME: error handling */ | |
674 | BUG_ON(!rphy); | |
675 | ||
2908d778 | 676 | sas_init_dev(child); |
1acce194 JB |
677 | |
678 | child->rphy = rphy; | |
679 | ||
680 | spin_lock(&parent->port->dev_list_lock); | |
681 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); | |
682 | spin_unlock(&parent->port->dev_list_lock); | |
683 | ||
2908d778 JB |
684 | res = sas_discover_sata(child); |
685 | if (res) { | |
686 | SAS_DPRINTK("sas_discover_sata() for device %16llx at " | |
687 | "%016llx:0x%x returned 0x%x\n", | |
688 | SAS_ADDR(child->sas_addr), | |
689 | SAS_ADDR(parent->sas_addr), phy_id, res); | |
1acce194 | 690 | goto out_list_del; |
2908d778 JB |
691 | } |
692 | } else if (phy->attached_tproto & SAS_PROTO_SSP) { | |
693 | child->dev_type = SAS_END_DEV; | |
694 | rphy = sas_end_device_alloc(phy->port); | |
695 | /* FIXME: error handling */ | |
024879ea JB |
696 | if (unlikely(!rphy)) |
697 | goto out_free; | |
2908d778 JB |
698 | child->tproto = phy->attached_tproto; |
699 | sas_init_dev(child); | |
700 | ||
701 | child->rphy = rphy; | |
702 | sas_fill_in_rphy(child, rphy); | |
703 | ||
704 | spin_lock(&parent->port->dev_list_lock); | |
705 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); | |
706 | spin_unlock(&parent->port->dev_list_lock); | |
707 | ||
708 | res = sas_discover_end_dev(child); | |
709 | if (res) { | |
710 | SAS_DPRINTK("sas_discover_end_dev() for device %16llx " | |
711 | "at %016llx:0x%x returned 0x%x\n", | |
712 | SAS_ADDR(child->sas_addr), | |
713 | SAS_ADDR(parent->sas_addr), phy_id, res); | |
024879ea | 714 | goto out_list_del; |
2908d778 JB |
715 | } |
716 | } else { | |
717 | SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n", | |
718 | phy->attached_tproto, SAS_ADDR(parent->sas_addr), | |
719 | phy_id); | |
720 | } | |
721 | ||
722 | list_add_tail(&child->siblings, &parent_ex->children); | |
723 | return child; | |
024879ea JB |
724 | |
725 | out_list_del: | |
6f63caae DW |
726 | sas_rphy_free(child->rphy); |
727 | child->rphy = NULL; | |
024879ea | 728 | list_del(&child->dev_list_node); |
024879ea JB |
729 | out_free: |
730 | sas_port_delete(phy->port); | |
731 | out_err: | |
732 | phy->port = NULL; | |
733 | kfree(child); | |
734 | return NULL; | |
2908d778 JB |
735 | } |
736 | ||
423f7cf4 DW |
737 | /* See if this phy is part of a wide port */ |
738 | static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id) | |
739 | { | |
740 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; | |
741 | int i; | |
742 | ||
743 | for (i = 0; i < parent->ex_dev.num_phys; i++) { | |
744 | struct ex_phy *ephy = &parent->ex_dev.ex_phy[i]; | |
745 | ||
746 | if (ephy == phy) | |
747 | continue; | |
748 | ||
749 | if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr, | |
750 | SAS_ADDR_SIZE) && ephy->port) { | |
751 | sas_port_add_phy(ephy->port, phy->phy); | |
752 | phy->phy_state = PHY_DEVICE_DISCOVERED; | |
753 | return 0; | |
754 | } | |
755 | } | |
756 | ||
757 | return -ENODEV; | |
758 | } | |
759 | ||
2908d778 JB |
760 | static struct domain_device *sas_ex_discover_expander( |
761 | struct domain_device *parent, int phy_id) | |
762 | { | |
763 | struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy); | |
764 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; | |
765 | struct domain_device *child = NULL; | |
766 | struct sas_rphy *rphy; | |
767 | struct sas_expander_device *edev; | |
768 | struct asd_sas_port *port; | |
769 | int res; | |
770 | ||
771 | if (phy->routing_attr == DIRECT_ROUTING) { | |
772 | SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not " | |
773 | "allowed\n", | |
774 | SAS_ADDR(parent->sas_addr), phy_id, | |
775 | SAS_ADDR(phy->attached_sas_addr), | |
776 | phy->attached_phy_id); | |
777 | return NULL; | |
778 | } | |
779 | child = kzalloc(sizeof(*child), GFP_KERNEL); | |
780 | if (!child) | |
781 | return NULL; | |
782 | ||
783 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); | |
784 | /* FIXME: better error handling */ | |
785 | BUG_ON(sas_port_add(phy->port) != 0); | |
786 | ||
787 | ||
788 | switch (phy->attached_dev_type) { | |
789 | case EDGE_DEV: | |
790 | rphy = sas_expander_alloc(phy->port, | |
791 | SAS_EDGE_EXPANDER_DEVICE); | |
792 | break; | |
793 | case FANOUT_DEV: | |
794 | rphy = sas_expander_alloc(phy->port, | |
795 | SAS_FANOUT_EXPANDER_DEVICE); | |
796 | break; | |
797 | default: | |
798 | rphy = NULL; /* shut gcc up */ | |
799 | BUG(); | |
800 | } | |
801 | port = parent->port; | |
802 | child->rphy = rphy; | |
803 | edev = rphy_to_expander_device(rphy); | |
804 | child->dev_type = phy->attached_dev_type; | |
805 | child->parent = parent; | |
806 | child->port = port; | |
807 | child->iproto = phy->attached_iproto; | |
808 | child->tproto = phy->attached_tproto; | |
809 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
810 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); | |
811 | sas_ex_get_linkrate(parent, child, phy); | |
812 | edev->level = parent_ex->level + 1; | |
813 | parent->port->disc.max_level = max(parent->port->disc.max_level, | |
814 | edev->level); | |
815 | sas_init_dev(child); | |
816 | sas_fill_in_rphy(child, rphy); | |
817 | sas_rphy_add(rphy); | |
818 | ||
819 | spin_lock(&parent->port->dev_list_lock); | |
820 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); | |
821 | spin_unlock(&parent->port->dev_list_lock); | |
822 | ||
823 | res = sas_discover_expander(child); | |
824 | if (res) { | |
825 | kfree(child); | |
826 | return NULL; | |
827 | } | |
828 | list_add_tail(&child->siblings, &parent->ex_dev.children); | |
829 | return child; | |
830 | } | |
831 | ||
832 | static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) | |
833 | { | |
834 | struct expander_device *ex = &dev->ex_dev; | |
835 | struct ex_phy *ex_phy = &ex->ex_phy[phy_id]; | |
836 | struct domain_device *child = NULL; | |
837 | int res = 0; | |
838 | ||
839 | /* Phy state */ | |
88edf746 | 840 | if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) { |
a01e70e5 | 841 | if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL)) |
2908d778 JB |
842 | res = sas_ex_phy_discover(dev, phy_id); |
843 | if (res) | |
844 | return res; | |
845 | } | |
846 | ||
847 | /* Parent and domain coherency */ | |
848 | if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == | |
849 | SAS_ADDR(dev->port->sas_addr))) { | |
850 | sas_add_parent_port(dev, phy_id); | |
851 | return 0; | |
852 | } | |
853 | if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == | |
854 | SAS_ADDR(dev->parent->sas_addr))) { | |
855 | sas_add_parent_port(dev, phy_id); | |
856 | if (ex_phy->routing_attr == TABLE_ROUTING) | |
857 | sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1); | |
858 | return 0; | |
859 | } | |
860 | ||
861 | if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr)) | |
862 | sas_ex_disable_port(dev, ex_phy->attached_sas_addr); | |
863 | ||
864 | if (ex_phy->attached_dev_type == NO_DEVICE) { | |
865 | if (ex_phy->routing_attr == DIRECT_ROUTING) { | |
866 | memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE); | |
867 | sas_configure_routing(dev, ex_phy->attached_sas_addr); | |
868 | } | |
869 | return 0; | |
88edf746 | 870 | } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN) |
2908d778 JB |
871 | return 0; |
872 | ||
873 | if (ex_phy->attached_dev_type != SAS_END_DEV && | |
874 | ex_phy->attached_dev_type != FANOUT_DEV && | |
875 | ex_phy->attached_dev_type != EDGE_DEV) { | |
876 | SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx " | |
877 | "phy 0x%x\n", ex_phy->attached_dev_type, | |
878 | SAS_ADDR(dev->sas_addr), | |
879 | phy_id); | |
880 | return 0; | |
881 | } | |
882 | ||
883 | res = sas_configure_routing(dev, ex_phy->attached_sas_addr); | |
884 | if (res) { | |
885 | SAS_DPRINTK("configure routing for dev %016llx " | |
886 | "reported 0x%x. Forgotten\n", | |
887 | SAS_ADDR(ex_phy->attached_sas_addr), res); | |
888 | sas_disable_routing(dev, ex_phy->attached_sas_addr); | |
889 | return res; | |
890 | } | |
891 | ||
423f7cf4 DW |
892 | res = sas_ex_join_wide_port(dev, phy_id); |
893 | if (!res) { | |
894 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", | |
895 | phy_id, SAS_ADDR(ex_phy->attached_sas_addr)); | |
896 | return res; | |
897 | } | |
898 | ||
2908d778 JB |
899 | switch (ex_phy->attached_dev_type) { |
900 | case SAS_END_DEV: | |
901 | child = sas_ex_discover_end_dev(dev, phy_id); | |
902 | break; | |
903 | case FANOUT_DEV: | |
904 | if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) { | |
905 | SAS_DPRINTK("second fanout expander %016llx phy 0x%x " | |
906 | "attached to ex %016llx phy 0x%x\n", | |
907 | SAS_ADDR(ex_phy->attached_sas_addr), | |
908 | ex_phy->attached_phy_id, | |
909 | SAS_ADDR(dev->sas_addr), | |
910 | phy_id); | |
911 | sas_ex_disable_phy(dev, phy_id); | |
912 | break; | |
913 | } else | |
914 | memcpy(dev->port->disc.fanout_sas_addr, | |
915 | ex_phy->attached_sas_addr, SAS_ADDR_SIZE); | |
916 | /* fallthrough */ | |
917 | case EDGE_DEV: | |
918 | child = sas_ex_discover_expander(dev, phy_id); | |
919 | break; | |
920 | default: | |
921 | break; | |
922 | } | |
923 | ||
924 | if (child) { | |
925 | int i; | |
926 | ||
927 | for (i = 0; i < ex->num_phys; i++) { | |
928 | if (ex->ex_phy[i].phy_state == PHY_VACANT || | |
929 | ex->ex_phy[i].phy_state == PHY_NOT_PRESENT) | |
930 | continue; | |
931 | ||
932 | if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) == | |
933 | SAS_ADDR(child->sas_addr)) | |
934 | ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED; | |
935 | } | |
936 | } | |
937 | ||
938 | return res; | |
939 | } | |
940 | ||
941 | static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr) | |
942 | { | |
943 | struct expander_device *ex = &dev->ex_dev; | |
944 | int i; | |
945 | ||
946 | for (i = 0; i < ex->num_phys; i++) { | |
947 | struct ex_phy *phy = &ex->ex_phy[i]; | |
948 | ||
949 | if (phy->phy_state == PHY_VACANT || | |
950 | phy->phy_state == PHY_NOT_PRESENT) | |
951 | continue; | |
952 | ||
953 | if ((phy->attached_dev_type == EDGE_DEV || | |
954 | phy->attached_dev_type == FANOUT_DEV) && | |
955 | phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
956 | ||
957 | memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE); | |
958 | ||
959 | return 1; | |
960 | } | |
961 | } | |
962 | return 0; | |
963 | } | |
964 | ||
965 | static int sas_check_level_subtractive_boundary(struct domain_device *dev) | |
966 | { | |
967 | struct expander_device *ex = &dev->ex_dev; | |
968 | struct domain_device *child; | |
969 | u8 sub_addr[8] = {0, }; | |
970 | ||
971 | list_for_each_entry(child, &ex->children, siblings) { | |
972 | if (child->dev_type != EDGE_DEV && | |
973 | child->dev_type != FANOUT_DEV) | |
974 | continue; | |
975 | if (sub_addr[0] == 0) { | |
976 | sas_find_sub_addr(child, sub_addr); | |
977 | continue; | |
978 | } else { | |
979 | u8 s2[8]; | |
980 | ||
981 | if (sas_find_sub_addr(child, s2) && | |
982 | (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) { | |
983 | ||
984 | SAS_DPRINTK("ex %016llx->%016llx-?->%016llx " | |
985 | "diverges from subtractive " | |
986 | "boundary %016llx\n", | |
987 | SAS_ADDR(dev->sas_addr), | |
988 | SAS_ADDR(child->sas_addr), | |
989 | SAS_ADDR(s2), | |
990 | SAS_ADDR(sub_addr)); | |
991 | ||
992 | sas_ex_disable_port(child, s2); | |
993 | } | |
994 | } | |
995 | } | |
996 | return 0; | |
997 | } | |
998 | /** | |
999 | * sas_ex_discover_devices -- discover devices attached to this expander | |
1000 | * dev: pointer to the expander domain device | |
1001 | * single: if you want to do a single phy, else set to -1; | |
1002 | * | |
1003 | * Configure this expander for use with its devices and register the | |
1004 | * devices of this expander. | |
1005 | */ | |
1006 | static int sas_ex_discover_devices(struct domain_device *dev, int single) | |
1007 | { | |
1008 | struct expander_device *ex = &dev->ex_dev; | |
1009 | int i = 0, end = ex->num_phys; | |
1010 | int res = 0; | |
1011 | ||
1012 | if (0 <= single && single < end) { | |
1013 | i = single; | |
1014 | end = i+1; | |
1015 | } | |
1016 | ||
1017 | for ( ; i < end; i++) { | |
1018 | struct ex_phy *ex_phy = &ex->ex_phy[i]; | |
1019 | ||
1020 | if (ex_phy->phy_state == PHY_VACANT || | |
1021 | ex_phy->phy_state == PHY_NOT_PRESENT || | |
1022 | ex_phy->phy_state == PHY_DEVICE_DISCOVERED) | |
1023 | continue; | |
1024 | ||
1025 | switch (ex_phy->linkrate) { | |
88edf746 JB |
1026 | case SAS_PHY_DISABLED: |
1027 | case SAS_PHY_RESET_PROBLEM: | |
1028 | case SAS_SATA_PORT_SELECTOR: | |
2908d778 JB |
1029 | continue; |
1030 | default: | |
1031 | res = sas_ex_discover_dev(dev, i); | |
1032 | if (res) | |
1033 | break; | |
1034 | continue; | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | if (!res) | |
1039 | sas_check_level_subtractive_boundary(dev); | |
1040 | ||
1041 | return res; | |
1042 | } | |
1043 | ||
1044 | static int sas_check_ex_subtractive_boundary(struct domain_device *dev) | |
1045 | { | |
1046 | struct expander_device *ex = &dev->ex_dev; | |
1047 | int i; | |
1048 | u8 *sub_sas_addr = NULL; | |
1049 | ||
1050 | if (dev->dev_type != EDGE_DEV) | |
1051 | return 0; | |
1052 | ||
1053 | for (i = 0; i < ex->num_phys; i++) { | |
1054 | struct ex_phy *phy = &ex->ex_phy[i]; | |
1055 | ||
1056 | if (phy->phy_state == PHY_VACANT || | |
1057 | phy->phy_state == PHY_NOT_PRESENT) | |
1058 | continue; | |
1059 | ||
1060 | if ((phy->attached_dev_type == FANOUT_DEV || | |
1061 | phy->attached_dev_type == EDGE_DEV) && | |
1062 | phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1063 | ||
1064 | if (!sub_sas_addr) | |
1065 | sub_sas_addr = &phy->attached_sas_addr[0]; | |
1066 | else if (SAS_ADDR(sub_sas_addr) != | |
1067 | SAS_ADDR(phy->attached_sas_addr)) { | |
1068 | ||
1069 | SAS_DPRINTK("ex %016llx phy 0x%x " | |
1070 | "diverges(%016llx) on subtractive " | |
1071 | "boundary(%016llx). Disabled\n", | |
1072 | SAS_ADDR(dev->sas_addr), i, | |
1073 | SAS_ADDR(phy->attached_sas_addr), | |
1074 | SAS_ADDR(sub_sas_addr)); | |
1075 | sas_ex_disable_phy(dev, i); | |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | return 0; | |
1080 | } | |
1081 | ||
1082 | static void sas_print_parent_topology_bug(struct domain_device *child, | |
1083 | struct ex_phy *parent_phy, | |
1084 | struct ex_phy *child_phy) | |
1085 | { | |
1086 | static const char ra_char[] = { | |
1087 | [DIRECT_ROUTING] = 'D', | |
1088 | [SUBTRACTIVE_ROUTING] = 'S', | |
1089 | [TABLE_ROUTING] = 'T', | |
1090 | }; | |
1091 | static const char *ex_type[] = { | |
1092 | [EDGE_DEV] = "edge", | |
1093 | [FANOUT_DEV] = "fanout", | |
1094 | }; | |
1095 | struct domain_device *parent = child->parent; | |
1096 | ||
1097 | sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx phy 0x%x " | |
1098 | "has %c:%c routing link!\n", | |
1099 | ||
1100 | ex_type[parent->dev_type], | |
1101 | SAS_ADDR(parent->sas_addr), | |
1102 | parent_phy->phy_id, | |
1103 | ||
1104 | ex_type[child->dev_type], | |
1105 | SAS_ADDR(child->sas_addr), | |
1106 | child_phy->phy_id, | |
1107 | ||
1108 | ra_char[parent_phy->routing_attr], | |
1109 | ra_char[child_phy->routing_attr]); | |
1110 | } | |
1111 | ||
1112 | static int sas_check_eeds(struct domain_device *child, | |
1113 | struct ex_phy *parent_phy, | |
1114 | struct ex_phy *child_phy) | |
1115 | { | |
1116 | int res = 0; | |
1117 | struct domain_device *parent = child->parent; | |
1118 | ||
1119 | if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) { | |
1120 | res = -ENODEV; | |
1121 | SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx " | |
1122 | "phy S:0x%x, while there is a fanout ex %016llx\n", | |
1123 | SAS_ADDR(parent->sas_addr), | |
1124 | parent_phy->phy_id, | |
1125 | SAS_ADDR(child->sas_addr), | |
1126 | child_phy->phy_id, | |
1127 | SAS_ADDR(parent->port->disc.fanout_sas_addr)); | |
1128 | } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) { | |
1129 | memcpy(parent->port->disc.eeds_a, parent->sas_addr, | |
1130 | SAS_ADDR_SIZE); | |
1131 | memcpy(parent->port->disc.eeds_b, child->sas_addr, | |
1132 | SAS_ADDR_SIZE); | |
1133 | } else if (((SAS_ADDR(parent->port->disc.eeds_a) == | |
1134 | SAS_ADDR(parent->sas_addr)) || | |
1135 | (SAS_ADDR(parent->port->disc.eeds_a) == | |
1136 | SAS_ADDR(child->sas_addr))) | |
1137 | && | |
1138 | ((SAS_ADDR(parent->port->disc.eeds_b) == | |
1139 | SAS_ADDR(parent->sas_addr)) || | |
1140 | (SAS_ADDR(parent->port->disc.eeds_b) == | |
1141 | SAS_ADDR(child->sas_addr)))) | |
1142 | ; | |
1143 | else { | |
1144 | res = -ENODEV; | |
1145 | SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx " | |
1146 | "phy 0x%x link forms a third EEDS!\n", | |
1147 | SAS_ADDR(parent->sas_addr), | |
1148 | parent_phy->phy_id, | |
1149 | SAS_ADDR(child->sas_addr), | |
1150 | child_phy->phy_id); | |
1151 | } | |
1152 | ||
1153 | return res; | |
1154 | } | |
1155 | ||
1156 | /* Here we spill over 80 columns. It is intentional. | |
1157 | */ | |
1158 | static int sas_check_parent_topology(struct domain_device *child) | |
1159 | { | |
1160 | struct expander_device *child_ex = &child->ex_dev; | |
1161 | struct expander_device *parent_ex; | |
1162 | int i; | |
1163 | int res = 0; | |
1164 | ||
1165 | if (!child->parent) | |
1166 | return 0; | |
1167 | ||
1168 | if (child->parent->dev_type != EDGE_DEV && | |
1169 | child->parent->dev_type != FANOUT_DEV) | |
1170 | return 0; | |
1171 | ||
1172 | parent_ex = &child->parent->ex_dev; | |
1173 | ||
1174 | for (i = 0; i < parent_ex->num_phys; i++) { | |
1175 | struct ex_phy *parent_phy = &parent_ex->ex_phy[i]; | |
1176 | struct ex_phy *child_phy; | |
1177 | ||
1178 | if (parent_phy->phy_state == PHY_VACANT || | |
1179 | parent_phy->phy_state == PHY_NOT_PRESENT) | |
1180 | continue; | |
1181 | ||
1182 | if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr)) | |
1183 | continue; | |
1184 | ||
1185 | child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; | |
1186 | ||
1187 | switch (child->parent->dev_type) { | |
1188 | case EDGE_DEV: | |
1189 | if (child->dev_type == FANOUT_DEV) { | |
1190 | if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || | |
1191 | child_phy->routing_attr != TABLE_ROUTING) { | |
1192 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1193 | res = -ENODEV; | |
1194 | } | |
1195 | } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1196 | if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1197 | res = sas_check_eeds(child, parent_phy, child_phy); | |
1198 | } else if (child_phy->routing_attr != TABLE_ROUTING) { | |
1199 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1200 | res = -ENODEV; | |
1201 | } | |
1202 | } else if (parent_phy->routing_attr == TABLE_ROUTING && | |
1203 | child_phy->routing_attr != SUBTRACTIVE_ROUTING) { | |
1204 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1205 | res = -ENODEV; | |
1206 | } | |
1207 | break; | |
1208 | case FANOUT_DEV: | |
1209 | if (parent_phy->routing_attr != TABLE_ROUTING || | |
1210 | child_phy->routing_attr != SUBTRACTIVE_ROUTING) { | |
1211 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1212 | res = -ENODEV; | |
1213 | } | |
1214 | break; | |
1215 | default: | |
1216 | break; | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | return res; | |
1221 | } | |
1222 | ||
1223 | #define RRI_REQ_SIZE 16 | |
1224 | #define RRI_RESP_SIZE 44 | |
1225 | ||
1226 | static int sas_configure_present(struct domain_device *dev, int phy_id, | |
1227 | u8 *sas_addr, int *index, int *present) | |
1228 | { | |
1229 | int i, res = 0; | |
1230 | struct expander_device *ex = &dev->ex_dev; | |
1231 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
1232 | u8 *rri_req; | |
1233 | u8 *rri_resp; | |
1234 | ||
1235 | *present = 0; | |
1236 | *index = 0; | |
1237 | ||
1238 | rri_req = alloc_smp_req(RRI_REQ_SIZE); | |
1239 | if (!rri_req) | |
1240 | return -ENOMEM; | |
1241 | ||
1242 | rri_resp = alloc_smp_resp(RRI_RESP_SIZE); | |
1243 | if (!rri_resp) { | |
1244 | kfree(rri_req); | |
1245 | return -ENOMEM; | |
1246 | } | |
1247 | ||
1248 | rri_req[1] = SMP_REPORT_ROUTE_INFO; | |
1249 | rri_req[9] = phy_id; | |
1250 | ||
1251 | for (i = 0; i < ex->max_route_indexes ; i++) { | |
1252 | *(__be16 *)(rri_req+6) = cpu_to_be16(i); | |
1253 | res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp, | |
1254 | RRI_RESP_SIZE); | |
1255 | if (res) | |
1256 | goto out; | |
1257 | res = rri_resp[2]; | |
1258 | if (res == SMP_RESP_NO_INDEX) { | |
1259 | SAS_DPRINTK("overflow of indexes: dev %016llx " | |
1260 | "phy 0x%x index 0x%x\n", | |
1261 | SAS_ADDR(dev->sas_addr), phy_id, i); | |
1262 | goto out; | |
1263 | } else if (res != SMP_RESP_FUNC_ACC) { | |
1264 | SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x " | |
1265 | "result 0x%x\n", __FUNCTION__, | |
1266 | SAS_ADDR(dev->sas_addr), phy_id, i, res); | |
1267 | goto out; | |
1268 | } | |
1269 | if (SAS_ADDR(sas_addr) != 0) { | |
1270 | if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) { | |
1271 | *index = i; | |
1272 | if ((rri_resp[12] & 0x80) == 0x80) | |
1273 | *present = 0; | |
1274 | else | |
1275 | *present = 1; | |
1276 | goto out; | |
1277 | } else if (SAS_ADDR(rri_resp+16) == 0) { | |
1278 | *index = i; | |
1279 | *present = 0; | |
1280 | goto out; | |
1281 | } | |
1282 | } else if (SAS_ADDR(rri_resp+16) == 0 && | |
1283 | phy->last_da_index < i) { | |
1284 | phy->last_da_index = i; | |
1285 | *index = i; | |
1286 | *present = 0; | |
1287 | goto out; | |
1288 | } | |
1289 | } | |
1290 | res = -1; | |
1291 | out: | |
1292 | kfree(rri_req); | |
1293 | kfree(rri_resp); | |
1294 | return res; | |
1295 | } | |
1296 | ||
1297 | #define CRI_REQ_SIZE 44 | |
1298 | #define CRI_RESP_SIZE 8 | |
1299 | ||
1300 | static int sas_configure_set(struct domain_device *dev, int phy_id, | |
1301 | u8 *sas_addr, int index, int include) | |
1302 | { | |
1303 | int res; | |
1304 | u8 *cri_req; | |
1305 | u8 *cri_resp; | |
1306 | ||
1307 | cri_req = alloc_smp_req(CRI_REQ_SIZE); | |
1308 | if (!cri_req) | |
1309 | return -ENOMEM; | |
1310 | ||
1311 | cri_resp = alloc_smp_resp(CRI_RESP_SIZE); | |
1312 | if (!cri_resp) { | |
1313 | kfree(cri_req); | |
1314 | return -ENOMEM; | |
1315 | } | |
1316 | ||
1317 | cri_req[1] = SMP_CONF_ROUTE_INFO; | |
1318 | *(__be16 *)(cri_req+6) = cpu_to_be16(index); | |
1319 | cri_req[9] = phy_id; | |
1320 | if (SAS_ADDR(sas_addr) == 0 || !include) | |
1321 | cri_req[12] |= 0x80; | |
1322 | memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE); | |
1323 | ||
1324 | res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp, | |
1325 | CRI_RESP_SIZE); | |
1326 | if (res) | |
1327 | goto out; | |
1328 | res = cri_resp[2]; | |
1329 | if (res == SMP_RESP_NO_INDEX) { | |
1330 | SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x " | |
1331 | "index 0x%x\n", | |
1332 | SAS_ADDR(dev->sas_addr), phy_id, index); | |
1333 | } | |
1334 | out: | |
1335 | kfree(cri_req); | |
1336 | kfree(cri_resp); | |
1337 | return res; | |
1338 | } | |
1339 | ||
1340 | static int sas_configure_phy(struct domain_device *dev, int phy_id, | |
1341 | u8 *sas_addr, int include) | |
1342 | { | |
1343 | int index; | |
1344 | int present; | |
1345 | int res; | |
1346 | ||
1347 | res = sas_configure_present(dev, phy_id, sas_addr, &index, &present); | |
1348 | if (res) | |
1349 | return res; | |
1350 | if (include ^ present) | |
1351 | return sas_configure_set(dev, phy_id, sas_addr, index,include); | |
1352 | ||
1353 | return res; | |
1354 | } | |
1355 | ||
1356 | /** | |
1357 | * sas_configure_parent -- configure routing table of parent | |
1358 | * parent: parent expander | |
1359 | * child: child expander | |
1360 | * sas_addr: SAS port identifier of device directly attached to child | |
1361 | */ | |
1362 | static int sas_configure_parent(struct domain_device *parent, | |
1363 | struct domain_device *child, | |
1364 | u8 *sas_addr, int include) | |
1365 | { | |
1366 | struct expander_device *ex_parent = &parent->ex_dev; | |
1367 | int res = 0; | |
1368 | int i; | |
1369 | ||
1370 | if (parent->parent) { | |
1371 | res = sas_configure_parent(parent->parent, parent, sas_addr, | |
1372 | include); | |
1373 | if (res) | |
1374 | return res; | |
1375 | } | |
1376 | ||
1377 | if (ex_parent->conf_route_table == 0) { | |
1378 | SAS_DPRINTK("ex %016llx has self-configuring routing table\n", | |
1379 | SAS_ADDR(parent->sas_addr)); | |
1380 | return 0; | |
1381 | } | |
1382 | ||
1383 | for (i = 0; i < ex_parent->num_phys; i++) { | |
1384 | struct ex_phy *phy = &ex_parent->ex_phy[i]; | |
1385 | ||
1386 | if ((phy->routing_attr == TABLE_ROUTING) && | |
1387 | (SAS_ADDR(phy->attached_sas_addr) == | |
1388 | SAS_ADDR(child->sas_addr))) { | |
1389 | res = sas_configure_phy(parent, i, sas_addr, include); | |
1390 | if (res) | |
1391 | return res; | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | return res; | |
1396 | } | |
1397 | ||
1398 | /** | |
1399 | * sas_configure_routing -- configure routing | |
1400 | * dev: expander device | |
1401 | * sas_addr: port identifier of device directly attached to the expander device | |
1402 | */ | |
1403 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr) | |
1404 | { | |
1405 | if (dev->parent) | |
1406 | return sas_configure_parent(dev->parent, dev, sas_addr, 1); | |
1407 | return 0; | |
1408 | } | |
1409 | ||
1410 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr) | |
1411 | { | |
1412 | if (dev->parent) | |
1413 | return sas_configure_parent(dev->parent, dev, sas_addr, 0); | |
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | #if 0 | |
1418 | #define SMP_BIN_ATTR_NAME "smp_portal" | |
1419 | ||
1420 | static void sas_ex_smp_hook(struct domain_device *dev) | |
1421 | { | |
1422 | struct expander_device *ex_dev = &dev->ex_dev; | |
1423 | struct bin_attribute *bin_attr = &ex_dev->smp_bin_attr; | |
1424 | ||
1425 | memset(bin_attr, 0, sizeof(*bin_attr)); | |
1426 | ||
1427 | bin_attr->attr.name = SMP_BIN_ATTR_NAME; | |
2908d778 JB |
1428 | bin_attr->attr.mode = 0600; |
1429 | ||
1430 | bin_attr->size = 0; | |
1431 | bin_attr->private = NULL; | |
1432 | bin_attr->read = smp_portal_read; | |
1433 | bin_attr->write= smp_portal_write; | |
1434 | bin_attr->mmap = NULL; | |
1435 | ||
1436 | ex_dev->smp_portal_pid = -1; | |
1437 | init_MUTEX(&ex_dev->smp_sema); | |
1438 | } | |
1439 | #endif | |
1440 | ||
1441 | /** | |
1442 | * sas_discover_expander -- expander discovery | |
1443 | * @ex: pointer to expander domain device | |
1444 | * | |
1445 | * See comment in sas_discover_sata(). | |
1446 | */ | |
1447 | static int sas_discover_expander(struct domain_device *dev) | |
1448 | { | |
1449 | int res; | |
1450 | ||
1451 | res = sas_notify_lldd_dev_found(dev); | |
1452 | if (res) | |
1453 | return res; | |
1454 | ||
1455 | res = sas_ex_general(dev); | |
1456 | if (res) | |
1457 | goto out_err; | |
1458 | res = sas_ex_manuf_info(dev); | |
1459 | if (res) | |
1460 | goto out_err; | |
1461 | ||
1462 | res = sas_expander_discover(dev); | |
1463 | if (res) { | |
1464 | SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n", | |
1465 | SAS_ADDR(dev->sas_addr), res); | |
1466 | goto out_err; | |
1467 | } | |
1468 | ||
1469 | sas_check_ex_subtractive_boundary(dev); | |
1470 | res = sas_check_parent_topology(dev); | |
1471 | if (res) | |
1472 | goto out_err; | |
1473 | return 0; | |
1474 | out_err: | |
1475 | sas_notify_lldd_dev_gone(dev); | |
1476 | return res; | |
1477 | } | |
1478 | ||
1479 | static int sas_ex_level_discovery(struct asd_sas_port *port, const int level) | |
1480 | { | |
1481 | int res = 0; | |
1482 | struct domain_device *dev; | |
1483 | ||
1484 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
1485 | if (dev->dev_type == EDGE_DEV || | |
1486 | dev->dev_type == FANOUT_DEV) { | |
1487 | struct sas_expander_device *ex = | |
1488 | rphy_to_expander_device(dev->rphy); | |
1489 | ||
1490 | if (level == ex->level) | |
1491 | res = sas_ex_discover_devices(dev, -1); | |
1492 | else if (level > 0) | |
1493 | res = sas_ex_discover_devices(port->port_dev, -1); | |
1494 | ||
1495 | } | |
1496 | } | |
1497 | ||
1498 | return res; | |
1499 | } | |
1500 | ||
1501 | static int sas_ex_bfs_disc(struct asd_sas_port *port) | |
1502 | { | |
1503 | int res; | |
1504 | int level; | |
1505 | ||
1506 | do { | |
1507 | level = port->disc.max_level; | |
1508 | res = sas_ex_level_discovery(port, level); | |
1509 | mb(); | |
1510 | } while (level < port->disc.max_level); | |
1511 | ||
1512 | return res; | |
1513 | } | |
1514 | ||
1515 | int sas_discover_root_expander(struct domain_device *dev) | |
1516 | { | |
1517 | int res; | |
1518 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); | |
1519 | ||
bf451207 DW |
1520 | res = sas_rphy_add(dev->rphy); |
1521 | if (res) | |
1522 | goto out_err; | |
2908d778 JB |
1523 | |
1524 | ex->level = dev->port->disc.max_level; /* 0 */ | |
1525 | res = sas_discover_expander(dev); | |
bf451207 DW |
1526 | if (res) |
1527 | goto out_err2; | |
1528 | ||
1529 | sas_ex_bfs_disc(dev->port); | |
2908d778 JB |
1530 | |
1531 | return res; | |
bf451207 DW |
1532 | |
1533 | out_err2: | |
6f63caae | 1534 | sas_rphy_remove(dev->rphy); |
bf451207 | 1535 | out_err: |
bf451207 | 1536 | return res; |
2908d778 JB |
1537 | } |
1538 | ||
1539 | /* ---------- Domain revalidation ---------- */ | |
1540 | ||
1541 | static int sas_get_phy_discover(struct domain_device *dev, | |
1542 | int phy_id, struct smp_resp *disc_resp) | |
1543 | { | |
1544 | int res; | |
1545 | u8 *disc_req; | |
1546 | ||
1547 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); | |
1548 | if (!disc_req) | |
1549 | return -ENOMEM; | |
1550 | ||
1551 | disc_req[1] = SMP_DISCOVER; | |
1552 | disc_req[9] = phy_id; | |
1553 | ||
1554 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, | |
1555 | disc_resp, DISCOVER_RESP_SIZE); | |
1556 | if (res) | |
1557 | goto out; | |
1558 | else if (disc_resp->result != SMP_RESP_FUNC_ACC) { | |
1559 | res = disc_resp->result; | |
1560 | goto out; | |
1561 | } | |
1562 | out: | |
1563 | kfree(disc_req); | |
1564 | return res; | |
1565 | } | |
1566 | ||
1567 | static int sas_get_phy_change_count(struct domain_device *dev, | |
1568 | int phy_id, int *pcc) | |
1569 | { | |
1570 | int res; | |
1571 | struct smp_resp *disc_resp; | |
1572 | ||
1573 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); | |
1574 | if (!disc_resp) | |
1575 | return -ENOMEM; | |
1576 | ||
1577 | res = sas_get_phy_discover(dev, phy_id, disc_resp); | |
1578 | if (!res) | |
1579 | *pcc = disc_resp->disc.change_count; | |
1580 | ||
1581 | kfree(disc_resp); | |
1582 | return res; | |
1583 | } | |
1584 | ||
1585 | static int sas_get_phy_attached_sas_addr(struct domain_device *dev, | |
1586 | int phy_id, u8 *attached_sas_addr) | |
1587 | { | |
1588 | int res; | |
1589 | struct smp_resp *disc_resp; | |
1590 | struct discover_resp *dr; | |
1591 | ||
1592 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); | |
1593 | if (!disc_resp) | |
1594 | return -ENOMEM; | |
1595 | dr = &disc_resp->disc; | |
1596 | ||
1597 | res = sas_get_phy_discover(dev, phy_id, disc_resp); | |
1598 | if (!res) { | |
1599 | memcpy(attached_sas_addr,disc_resp->disc.attached_sas_addr,8); | |
1600 | if (dr->attached_dev_type == 0) | |
1601 | memset(attached_sas_addr, 0, 8); | |
1602 | } | |
1603 | kfree(disc_resp); | |
1604 | return res; | |
1605 | } | |
1606 | ||
1607 | static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id, | |
1608 | int from_phy) | |
1609 | { | |
1610 | struct expander_device *ex = &dev->ex_dev; | |
1611 | int res = 0; | |
1612 | int i; | |
1613 | ||
1614 | for (i = from_phy; i < ex->num_phys; i++) { | |
1615 | int phy_change_count = 0; | |
1616 | ||
1617 | res = sas_get_phy_change_count(dev, i, &phy_change_count); | |
1618 | if (res) | |
1619 | goto out; | |
1620 | else if (phy_change_count != ex->ex_phy[i].phy_change_count) { | |
1621 | ex->ex_phy[i].phy_change_count = phy_change_count; | |
1622 | *phy_id = i; | |
1623 | return 0; | |
1624 | } | |
1625 | } | |
1626 | out: | |
1627 | return res; | |
1628 | } | |
1629 | ||
1630 | static int sas_get_ex_change_count(struct domain_device *dev, int *ecc) | |
1631 | { | |
1632 | int res; | |
1633 | u8 *rg_req; | |
1634 | struct smp_resp *rg_resp; | |
1635 | ||
1636 | rg_req = alloc_smp_req(RG_REQ_SIZE); | |
1637 | if (!rg_req) | |
1638 | return -ENOMEM; | |
1639 | ||
1640 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); | |
1641 | if (!rg_resp) { | |
1642 | kfree(rg_req); | |
1643 | return -ENOMEM; | |
1644 | } | |
1645 | ||
1646 | rg_req[1] = SMP_REPORT_GENERAL; | |
1647 | ||
1648 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, | |
1649 | RG_RESP_SIZE); | |
1650 | if (res) | |
1651 | goto out; | |
1652 | if (rg_resp->result != SMP_RESP_FUNC_ACC) { | |
1653 | res = rg_resp->result; | |
1654 | goto out; | |
1655 | } | |
1656 | ||
1657 | *ecc = be16_to_cpu(rg_resp->rg.change_count); | |
1658 | out: | |
1659 | kfree(rg_resp); | |
1660 | kfree(rg_req); | |
1661 | return res; | |
1662 | } | |
1663 | ||
1664 | static int sas_find_bcast_dev(struct domain_device *dev, | |
1665 | struct domain_device **src_dev) | |
1666 | { | |
1667 | struct expander_device *ex = &dev->ex_dev; | |
1668 | int ex_change_count = -1; | |
1669 | int res; | |
1670 | ||
1671 | res = sas_get_ex_change_count(dev, &ex_change_count); | |
1672 | if (res) | |
1673 | goto out; | |
1674 | if (ex_change_count != -1 && | |
1675 | ex_change_count != ex->ex_change_count) { | |
1676 | *src_dev = dev; | |
1677 | ex->ex_change_count = ex_change_count; | |
1678 | } else { | |
1679 | struct domain_device *ch; | |
1680 | ||
1681 | list_for_each_entry(ch, &ex->children, siblings) { | |
1682 | if (ch->dev_type == EDGE_DEV || | |
1683 | ch->dev_type == FANOUT_DEV) { | |
1684 | res = sas_find_bcast_dev(ch, src_dev); | |
1685 | if (src_dev) | |
1686 | return res; | |
1687 | } | |
1688 | } | |
1689 | } | |
1690 | out: | |
1691 | return res; | |
1692 | } | |
1693 | ||
1694 | static void sas_unregister_ex_tree(struct domain_device *dev) | |
1695 | { | |
1696 | struct expander_device *ex = &dev->ex_dev; | |
1697 | struct domain_device *child, *n; | |
1698 | ||
1699 | list_for_each_entry_safe(child, n, &ex->children, siblings) { | |
1700 | if (child->dev_type == EDGE_DEV || | |
1701 | child->dev_type == FANOUT_DEV) | |
1702 | sas_unregister_ex_tree(child); | |
1703 | else | |
1704 | sas_unregister_dev(child); | |
1705 | } | |
1706 | sas_unregister_dev(dev); | |
1707 | } | |
1708 | ||
1709 | static void sas_unregister_devs_sas_addr(struct domain_device *parent, | |
1710 | int phy_id) | |
1711 | { | |
1712 | struct expander_device *ex_dev = &parent->ex_dev; | |
1713 | struct ex_phy *phy = &ex_dev->ex_phy[phy_id]; | |
1714 | struct domain_device *child, *n; | |
1715 | ||
1716 | list_for_each_entry_safe(child, n, &ex_dev->children, siblings) { | |
1717 | if (SAS_ADDR(child->sas_addr) == | |
1718 | SAS_ADDR(phy->attached_sas_addr)) { | |
1719 | if (child->dev_type == EDGE_DEV || | |
1720 | child->dev_type == FANOUT_DEV) | |
1721 | sas_unregister_ex_tree(child); | |
1722 | else | |
1723 | sas_unregister_dev(child); | |
1724 | break; | |
1725 | } | |
1726 | } | |
1727 | sas_disable_routing(parent, phy->attached_sas_addr); | |
1728 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); | |
1729 | sas_port_delete_phy(phy->port, phy->phy); | |
1730 | if (phy->port->num_phys == 0) | |
1731 | sas_port_delete(phy->port); | |
1732 | phy->port = NULL; | |
1733 | } | |
1734 | ||
1735 | static int sas_discover_bfs_by_root_level(struct domain_device *root, | |
1736 | const int level) | |
1737 | { | |
1738 | struct expander_device *ex_root = &root->ex_dev; | |
1739 | struct domain_device *child; | |
1740 | int res = 0; | |
1741 | ||
1742 | list_for_each_entry(child, &ex_root->children, siblings) { | |
1743 | if (child->dev_type == EDGE_DEV || | |
1744 | child->dev_type == FANOUT_DEV) { | |
1745 | struct sas_expander_device *ex = | |
1746 | rphy_to_expander_device(child->rphy); | |
1747 | ||
1748 | if (level > ex->level) | |
1749 | res = sas_discover_bfs_by_root_level(child, | |
1750 | level); | |
1751 | else if (level == ex->level) | |
1752 | res = sas_ex_discover_devices(child, -1); | |
1753 | } | |
1754 | } | |
1755 | return res; | |
1756 | } | |
1757 | ||
1758 | static int sas_discover_bfs_by_root(struct domain_device *dev) | |
1759 | { | |
1760 | int res; | |
1761 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); | |
1762 | int level = ex->level+1; | |
1763 | ||
1764 | res = sas_ex_discover_devices(dev, -1); | |
1765 | if (res) | |
1766 | goto out; | |
1767 | do { | |
1768 | res = sas_discover_bfs_by_root_level(dev, level); | |
1769 | mb(); | |
1770 | level += 1; | |
1771 | } while (level <= dev->port->disc.max_level); | |
1772 | out: | |
1773 | return res; | |
1774 | } | |
1775 | ||
1776 | static int sas_discover_new(struct domain_device *dev, int phy_id) | |
1777 | { | |
1778 | struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id]; | |
1779 | struct domain_device *child; | |
1780 | int res; | |
1781 | ||
1782 | SAS_DPRINTK("ex %016llx phy%d new device attached\n", | |
1783 | SAS_ADDR(dev->sas_addr), phy_id); | |
1784 | res = sas_ex_phy_discover(dev, phy_id); | |
1785 | if (res) | |
1786 | goto out; | |
1787 | res = sas_ex_discover_devices(dev, phy_id); | |
1788 | if (res) | |
1789 | goto out; | |
1790 | list_for_each_entry(child, &dev->ex_dev.children, siblings) { | |
1791 | if (SAS_ADDR(child->sas_addr) == | |
1792 | SAS_ADDR(ex_phy->attached_sas_addr)) { | |
1793 | if (child->dev_type == EDGE_DEV || | |
1794 | child->dev_type == FANOUT_DEV) | |
1795 | res = sas_discover_bfs_by_root(child); | |
1796 | break; | |
1797 | } | |
1798 | } | |
1799 | out: | |
1800 | return res; | |
1801 | } | |
1802 | ||
1803 | static int sas_rediscover_dev(struct domain_device *dev, int phy_id) | |
1804 | { | |
1805 | struct expander_device *ex = &dev->ex_dev; | |
1806 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
1807 | u8 attached_sas_addr[8]; | |
1808 | int res; | |
1809 | ||
1810 | res = sas_get_phy_attached_sas_addr(dev, phy_id, attached_sas_addr); | |
1811 | switch (res) { | |
1812 | case SMP_RESP_NO_PHY: | |
1813 | phy->phy_state = PHY_NOT_PRESENT; | |
1814 | sas_unregister_devs_sas_addr(dev, phy_id); | |
1815 | goto out; break; | |
1816 | case SMP_RESP_PHY_VACANT: | |
1817 | phy->phy_state = PHY_VACANT; | |
1818 | sas_unregister_devs_sas_addr(dev, phy_id); | |
1819 | goto out; break; | |
1820 | case SMP_RESP_FUNC_ACC: | |
1821 | break; | |
1822 | } | |
1823 | ||
1824 | if (SAS_ADDR(attached_sas_addr) == 0) { | |
1825 | phy->phy_state = PHY_EMPTY; | |
1826 | sas_unregister_devs_sas_addr(dev, phy_id); | |
1827 | } else if (SAS_ADDR(attached_sas_addr) == | |
1828 | SAS_ADDR(phy->attached_sas_addr)) { | |
1829 | SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n", | |
1830 | SAS_ADDR(dev->sas_addr), phy_id); | |
a01e70e5 | 1831 | sas_ex_phy_discover(dev, phy_id); |
2908d778 JB |
1832 | } else |
1833 | res = sas_discover_new(dev, phy_id); | |
1834 | out: | |
1835 | return res; | |
1836 | } | |
1837 | ||
1838 | static int sas_rediscover(struct domain_device *dev, const int phy_id) | |
1839 | { | |
1840 | struct expander_device *ex = &dev->ex_dev; | |
1841 | struct ex_phy *changed_phy = &ex->ex_phy[phy_id]; | |
1842 | int res = 0; | |
1843 | int i; | |
1844 | ||
1845 | SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n", | |
1846 | SAS_ADDR(dev->sas_addr), phy_id); | |
1847 | ||
1848 | if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) { | |
1849 | for (i = 0; i < ex->num_phys; i++) { | |
1850 | struct ex_phy *phy = &ex->ex_phy[i]; | |
1851 | ||
1852 | if (i == phy_id) | |
1853 | continue; | |
1854 | if (SAS_ADDR(phy->attached_sas_addr) == | |
1855 | SAS_ADDR(changed_phy->attached_sas_addr)) { | |
1856 | SAS_DPRINTK("phy%d part of wide port with " | |
1857 | "phy%d\n", phy_id, i); | |
1858 | goto out; | |
1859 | } | |
1860 | } | |
1861 | res = sas_rediscover_dev(dev, phy_id); | |
1862 | } else | |
1863 | res = sas_discover_new(dev, phy_id); | |
1864 | out: | |
1865 | return res; | |
1866 | } | |
1867 | ||
1868 | /** | |
1869 | * sas_revalidate_domain -- revalidate the domain | |
1870 | * @port: port to the domain of interest | |
1871 | * | |
1872 | * NOTE: this process _must_ quit (return) as soon as any connection | |
1873 | * errors are encountered. Connection recovery is done elsewhere. | |
1874 | * Discover process only interrogates devices in order to discover the | |
1875 | * domain. | |
1876 | */ | |
1877 | int sas_ex_revalidate_domain(struct domain_device *port_dev) | |
1878 | { | |
1879 | int res; | |
1880 | struct domain_device *dev = NULL; | |
1881 | ||
1882 | res = sas_find_bcast_dev(port_dev, &dev); | |
1883 | if (res) | |
1884 | goto out; | |
1885 | if (dev) { | |
1886 | struct expander_device *ex = &dev->ex_dev; | |
1887 | int i = 0, phy_id; | |
1888 | ||
1889 | do { | |
1890 | phy_id = -1; | |
1891 | res = sas_find_bcast_phy(dev, &phy_id, i); | |
1892 | if (phy_id == -1) | |
1893 | break; | |
1894 | res = sas_rediscover(dev, phy_id); | |
1895 | i = phy_id + 1; | |
1896 | } while (i < ex->num_phys); | |
1897 | } | |
1898 | out: | |
1899 | return res; | |
1900 | } | |
1901 | ||
1902 | #if 0 | |
1903 | /* ---------- SMP portal ---------- */ | |
1904 | ||
91a69029 ZR |
1905 | static ssize_t smp_portal_write(struct kobject *kobj, |
1906 | struct bin_attribute *bin_attr, | |
1907 | char *buf, loff_t offs, size_t size) | |
2908d778 JB |
1908 | { |
1909 | struct domain_device *dev = to_dom_device(kobj); | |
1910 | struct expander_device *ex = &dev->ex_dev; | |
1911 | ||
1912 | if (offs != 0) | |
1913 | return -EFBIG; | |
1914 | else if (size == 0) | |
1915 | return 0; | |
1916 | ||
1917 | down_interruptible(&ex->smp_sema); | |
1918 | if (ex->smp_req) | |
1919 | kfree(ex->smp_req); | |
1920 | ex->smp_req = kzalloc(size, GFP_USER); | |
1921 | if (!ex->smp_req) { | |
1922 | up(&ex->smp_sema); | |
1923 | return -ENOMEM; | |
1924 | } | |
1925 | memcpy(ex->smp_req, buf, size); | |
1926 | ex->smp_req_size = size; | |
1927 | ex->smp_portal_pid = current->pid; | |
1928 | up(&ex->smp_sema); | |
1929 | ||
1930 | return size; | |
1931 | } | |
1932 | ||
91a69029 ZR |
1933 | static ssize_t smp_portal_read(struct kobject *kobj, |
1934 | struct bin_attribute *bin_attr, | |
1935 | char *buf, loff_t offs, size_t size) | |
2908d778 JB |
1936 | { |
1937 | struct domain_device *dev = to_dom_device(kobj); | |
1938 | struct expander_device *ex = &dev->ex_dev; | |
1939 | u8 *smp_resp; | |
1940 | int res = -EINVAL; | |
1941 | ||
1942 | /* XXX: sysfs gives us an offset of 0x10 or 0x8 while in fact | |
1943 | * it should be 0. | |
1944 | */ | |
1945 | ||
1946 | down_interruptible(&ex->smp_sema); | |
1947 | if (!ex->smp_req || ex->smp_portal_pid != current->pid) | |
1948 | goto out; | |
1949 | ||
1950 | res = 0; | |
1951 | if (size == 0) | |
1952 | goto out; | |
1953 | ||
1954 | res = -ENOMEM; | |
1955 | smp_resp = alloc_smp_resp(size); | |
1956 | if (!smp_resp) | |
1957 | goto out; | |
1958 | res = smp_execute_task(dev, ex->smp_req, ex->smp_req_size, | |
1959 | smp_resp, size); | |
1960 | if (!res) { | |
1961 | memcpy(buf, smp_resp, size); | |
1962 | res = size; | |
1963 | } | |
1964 | ||
1965 | kfree(smp_resp); | |
1966 | out: | |
1967 | kfree(ex->smp_req); | |
1968 | ex->smp_req = NULL; | |
1969 | ex->smp_req_size = 0; | |
1970 | ex->smp_portal_pid = -1; | |
1971 | up(&ex->smp_sema); | |
1972 | return res; | |
1973 | } | |
1974 | #endif |