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Commit | Line | Data |
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2908d778 JB |
1 | /* |
2 | * Serial Attached SCSI (SAS) Expander discovery and configuration | |
3 | * | |
4 | * Copyright (C) 2005 Adaptec, Inc. All rights reserved. | |
5 | * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> | |
6 | * | |
7 | * This file is licensed under GPLv2. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation; either version 2 of the | |
12 | * License, or (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | * | |
23 | */ | |
24 | ||
2908d778 | 25 | #include <linux/scatterlist.h> |
ba1fc175 | 26 | #include <linux/blkdev.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
2908d778 JB |
28 | |
29 | #include "sas_internal.h" | |
30 | ||
31 | #include <scsi/scsi_transport.h> | |
32 | #include <scsi/scsi_transport_sas.h> | |
33 | #include "../scsi_sas_internal.h" | |
34 | ||
35 | static int sas_discover_expander(struct domain_device *dev); | |
36 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr); | |
37 | static int sas_configure_phy(struct domain_device *dev, int phy_id, | |
38 | u8 *sas_addr, int include); | |
39 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr); | |
40 | ||
2908d778 JB |
41 | /* ---------- SMP task management ---------- */ |
42 | ||
43 | static void smp_task_timedout(unsigned long _task) | |
44 | { | |
45 | struct sas_task *task = (void *) _task; | |
46 | unsigned long flags; | |
47 | ||
48 | spin_lock_irqsave(&task->task_state_lock, flags); | |
49 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
50 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
51 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
52 | ||
53 | complete(&task->completion); | |
54 | } | |
55 | ||
56 | static void smp_task_done(struct sas_task *task) | |
57 | { | |
58 | if (!del_timer(&task->timer)) | |
59 | return; | |
60 | complete(&task->completion); | |
61 | } | |
62 | ||
63 | /* Give it some long enough timeout. In seconds. */ | |
64 | #define SMP_TIMEOUT 10 | |
65 | ||
66 | static int smp_execute_task(struct domain_device *dev, void *req, int req_size, | |
67 | void *resp, int resp_size) | |
68 | { | |
42961ee8 | 69 | int res, retry; |
70 | struct sas_task *task = NULL; | |
2908d778 JB |
71 | struct sas_internal *i = |
72 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
73 | ||
42961ee8 | 74 | for (retry = 0; retry < 3; retry++) { |
75 | task = sas_alloc_task(GFP_KERNEL); | |
76 | if (!task) | |
77 | return -ENOMEM; | |
2908d778 | 78 | |
42961ee8 | 79 | task->dev = dev; |
80 | task->task_proto = dev->tproto; | |
81 | sg_init_one(&task->smp_task.smp_req, req, req_size); | |
82 | sg_init_one(&task->smp_task.smp_resp, resp, resp_size); | |
2908d778 | 83 | |
42961ee8 | 84 | task->task_done = smp_task_done; |
2908d778 | 85 | |
42961ee8 | 86 | task->timer.data = (unsigned long) task; |
87 | task->timer.function = smp_task_timedout; | |
88 | task->timer.expires = jiffies + SMP_TIMEOUT*HZ; | |
89 | add_timer(&task->timer); | |
2908d778 | 90 | |
42961ee8 | 91 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); |
2908d778 | 92 | |
42961ee8 | 93 | if (res) { |
94 | del_timer(&task->timer); | |
95 | SAS_DPRINTK("executing SMP task failed:%d\n", res); | |
2908d778 JB |
96 | goto ex_err; |
97 | } | |
42961ee8 | 98 | |
99 | wait_for_completion(&task->completion); | |
32e8ae36 | 100 | res = -ECOMM; |
42961ee8 | 101 | if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { |
102 | SAS_DPRINTK("smp task timed out or aborted\n"); | |
103 | i->dft->lldd_abort_task(task); | |
104 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { | |
105 | SAS_DPRINTK("SMP task aborted and not done\n"); | |
106 | goto ex_err; | |
107 | } | |
108 | } | |
109 | if (task->task_status.resp == SAS_TASK_COMPLETE && | |
df64d3ca | 110 | task->task_status.stat == SAM_STAT_GOOD) { |
42961ee8 | 111 | res = 0; |
112 | break; | |
2d4b63e1 JB |
113 | } if (task->task_status.resp == SAS_TASK_COMPLETE && |
114 | task->task_status.stat == SAS_DATA_UNDERRUN) { | |
115 | /* no error, but return the number of bytes of | |
116 | * underrun */ | |
117 | res = task->task_status.residual; | |
118 | break; | |
119 | } if (task->task_status.resp == SAS_TASK_COMPLETE && | |
120 | task->task_status.stat == SAS_DATA_OVERRUN) { | |
121 | res = -EMSGSIZE; | |
122 | break; | |
42961ee8 | 123 | } else { |
124 | SAS_DPRINTK("%s: task to dev %016llx response: 0x%x " | |
cadbd4a5 | 125 | "status 0x%x\n", __func__, |
42961ee8 | 126 | SAS_ADDR(dev->sas_addr), |
127 | task->task_status.resp, | |
128 | task->task_status.stat); | |
129 | sas_free_task(task); | |
130 | task = NULL; | |
131 | } | |
2908d778 | 132 | } |
2908d778 | 133 | ex_err: |
42961ee8 | 134 | BUG_ON(retry == 3 && task != NULL); |
135 | if (task != NULL) { | |
136 | sas_free_task(task); | |
137 | } | |
2908d778 JB |
138 | return res; |
139 | } | |
140 | ||
141 | /* ---------- Allocations ---------- */ | |
142 | ||
143 | static inline void *alloc_smp_req(int size) | |
144 | { | |
145 | u8 *p = kzalloc(size, GFP_KERNEL); | |
146 | if (p) | |
147 | p[0] = SMP_REQUEST; | |
148 | return p; | |
149 | } | |
150 | ||
151 | static inline void *alloc_smp_resp(int size) | |
152 | { | |
153 | return kzalloc(size, GFP_KERNEL); | |
154 | } | |
155 | ||
156 | /* ---------- Expander configuration ---------- */ | |
157 | ||
158 | static void sas_set_ex_phy(struct domain_device *dev, int phy_id, | |
159 | void *disc_resp) | |
160 | { | |
161 | struct expander_device *ex = &dev->ex_dev; | |
162 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
163 | struct smp_resp *resp = disc_resp; | |
164 | struct discover_resp *dr = &resp->disc; | |
165 | struct sas_rphy *rphy = dev->rphy; | |
166 | int rediscover = (phy->phy != NULL); | |
167 | ||
168 | if (!rediscover) { | |
169 | phy->phy = sas_phy_alloc(&rphy->dev, phy_id); | |
170 | ||
171 | /* FIXME: error_handling */ | |
172 | BUG_ON(!phy->phy); | |
173 | } | |
174 | ||
175 | switch (resp->result) { | |
176 | case SMP_RESP_PHY_VACANT: | |
177 | phy->phy_state = PHY_VACANT; | |
2bc72c91 | 178 | break; |
2908d778 JB |
179 | default: |
180 | phy->phy_state = PHY_NOT_PRESENT; | |
2bc72c91 | 181 | break; |
2908d778 JB |
182 | case SMP_RESP_FUNC_ACC: |
183 | phy->phy_state = PHY_EMPTY; /* do not know yet */ | |
184 | break; | |
185 | } | |
186 | ||
187 | phy->phy_id = phy_id; | |
188 | phy->attached_dev_type = dr->attached_dev_type; | |
189 | phy->linkrate = dr->linkrate; | |
190 | phy->attached_sata_host = dr->attached_sata_host; | |
191 | phy->attached_sata_dev = dr->attached_sata_dev; | |
192 | phy->attached_sata_ps = dr->attached_sata_ps; | |
193 | phy->attached_iproto = dr->iproto << 1; | |
194 | phy->attached_tproto = dr->tproto << 1; | |
195 | memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE); | |
196 | phy->attached_phy_id = dr->attached_phy_id; | |
197 | phy->phy_change_count = dr->change_count; | |
198 | phy->routing_attr = dr->routing_attr; | |
199 | phy->virtual = dr->virtual; | |
200 | phy->last_da_index = -1; | |
201 | ||
202 | phy->phy->identify.initiator_port_protocols = phy->attached_iproto; | |
203 | phy->phy->identify.target_port_protocols = phy->attached_tproto; | |
204 | phy->phy->identify.phy_identifier = phy_id; | |
a01e70e5 JB |
205 | phy->phy->minimum_linkrate_hw = dr->hmin_linkrate; |
206 | phy->phy->maximum_linkrate_hw = dr->hmax_linkrate; | |
207 | phy->phy->minimum_linkrate = dr->pmin_linkrate; | |
208 | phy->phy->maximum_linkrate = dr->pmax_linkrate; | |
88edf746 | 209 | phy->phy->negotiated_linkrate = phy->linkrate; |
2908d778 JB |
210 | |
211 | if (!rediscover) | |
2bc72c91 JW |
212 | if (sas_phy_add(phy->phy)) { |
213 | sas_phy_free(phy->phy); | |
214 | return; | |
215 | } | |
2908d778 JB |
216 | |
217 | SAS_DPRINTK("ex %016llx phy%02d:%c attached: %016llx\n", | |
218 | SAS_ADDR(dev->sas_addr), phy->phy_id, | |
219 | phy->routing_attr == TABLE_ROUTING ? 'T' : | |
220 | phy->routing_attr == DIRECT_ROUTING ? 'D' : | |
221 | phy->routing_attr == SUBTRACTIVE_ROUTING ? 'S' : '?', | |
222 | SAS_ADDR(phy->attached_sas_addr)); | |
223 | ||
224 | return; | |
225 | } | |
226 | ||
227 | #define DISCOVER_REQ_SIZE 16 | |
228 | #define DISCOVER_RESP_SIZE 56 | |
229 | ||
1acce194 JB |
230 | static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req, |
231 | u8 *disc_resp, int single) | |
232 | { | |
233 | int i, res; | |
234 | ||
235 | disc_req[9] = single; | |
236 | for (i = 1 ; i < 3; i++) { | |
237 | struct discover_resp *dr; | |
238 | ||
239 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, | |
240 | disc_resp, DISCOVER_RESP_SIZE); | |
241 | if (res) | |
242 | return res; | |
243 | /* This is detecting a failure to transmit inital | |
244 | * dev to host FIS as described in section G.5 of | |
245 | * sas-2 r 04b */ | |
246 | dr = &((struct smp_resp *)disc_resp)->disc; | |
183ce896 | 247 | if (memcmp(dev->sas_addr, dr->attached_sas_addr, |
248 | SAS_ADDR_SIZE) == 0) { | |
249 | sas_printk("Found loopback topology, just ignore it!\n"); | |
250 | return 0; | |
251 | } | |
1acce194 JB |
252 | if (!(dr->attached_dev_type == 0 && |
253 | dr->attached_sata_dev)) | |
254 | break; | |
255 | /* In order to generate the dev to host FIS, we | |
256 | * send a link reset to the expander port */ | |
38e2f035 | 257 | sas_smp_phy_control(dev, single, PHY_FUNC_LINK_RESET, NULL); |
1acce194 JB |
258 | /* Wait for the reset to trigger the negotiation */ |
259 | msleep(500); | |
260 | } | |
261 | sas_set_ex_phy(dev, single, disc_resp); | |
262 | return 0; | |
263 | } | |
264 | ||
2908d778 JB |
265 | static int sas_ex_phy_discover(struct domain_device *dev, int single) |
266 | { | |
267 | struct expander_device *ex = &dev->ex_dev; | |
268 | int res = 0; | |
269 | u8 *disc_req; | |
270 | u8 *disc_resp; | |
271 | ||
272 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); | |
273 | if (!disc_req) | |
274 | return -ENOMEM; | |
275 | ||
276 | disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE); | |
277 | if (!disc_resp) { | |
278 | kfree(disc_req); | |
279 | return -ENOMEM; | |
280 | } | |
281 | ||
282 | disc_req[1] = SMP_DISCOVER; | |
283 | ||
284 | if (0 <= single && single < ex->num_phys) { | |
1acce194 | 285 | res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single); |
2908d778 JB |
286 | } else { |
287 | int i; | |
288 | ||
289 | for (i = 0; i < ex->num_phys; i++) { | |
1acce194 JB |
290 | res = sas_ex_phy_discover_helper(dev, disc_req, |
291 | disc_resp, i); | |
2908d778 JB |
292 | if (res) |
293 | goto out_err; | |
2908d778 JB |
294 | } |
295 | } | |
296 | out_err: | |
297 | kfree(disc_resp); | |
298 | kfree(disc_req); | |
299 | return res; | |
300 | } | |
301 | ||
302 | static int sas_expander_discover(struct domain_device *dev) | |
303 | { | |
304 | struct expander_device *ex = &dev->ex_dev; | |
305 | int res = -ENOMEM; | |
306 | ||
307 | ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL); | |
308 | if (!ex->ex_phy) | |
309 | return -ENOMEM; | |
310 | ||
311 | res = sas_ex_phy_discover(dev, -1); | |
312 | if (res) | |
313 | goto out_err; | |
314 | ||
315 | return 0; | |
316 | out_err: | |
317 | kfree(ex->ex_phy); | |
318 | ex->ex_phy = NULL; | |
319 | return res; | |
320 | } | |
321 | ||
322 | #define MAX_EXPANDER_PHYS 128 | |
323 | ||
324 | static void ex_assign_report_general(struct domain_device *dev, | |
325 | struct smp_resp *resp) | |
326 | { | |
327 | struct report_general_resp *rg = &resp->rg; | |
328 | ||
329 | dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count); | |
330 | dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes); | |
331 | dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS); | |
332 | dev->ex_dev.conf_route_table = rg->conf_route_table; | |
333 | dev->ex_dev.configuring = rg->configuring; | |
334 | memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8); | |
335 | } | |
336 | ||
337 | #define RG_REQ_SIZE 8 | |
338 | #define RG_RESP_SIZE 32 | |
339 | ||
340 | static int sas_ex_general(struct domain_device *dev) | |
341 | { | |
342 | u8 *rg_req; | |
343 | struct smp_resp *rg_resp; | |
344 | int res; | |
345 | int i; | |
346 | ||
347 | rg_req = alloc_smp_req(RG_REQ_SIZE); | |
348 | if (!rg_req) | |
349 | return -ENOMEM; | |
350 | ||
351 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); | |
352 | if (!rg_resp) { | |
353 | kfree(rg_req); | |
354 | return -ENOMEM; | |
355 | } | |
356 | ||
357 | rg_req[1] = SMP_REPORT_GENERAL; | |
358 | ||
359 | for (i = 0; i < 5; i++) { | |
360 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, | |
361 | RG_RESP_SIZE); | |
362 | ||
363 | if (res) { | |
364 | SAS_DPRINTK("RG to ex %016llx failed:0x%x\n", | |
365 | SAS_ADDR(dev->sas_addr), res); | |
366 | goto out; | |
367 | } else if (rg_resp->result != SMP_RESP_FUNC_ACC) { | |
368 | SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n", | |
369 | SAS_ADDR(dev->sas_addr), rg_resp->result); | |
370 | res = rg_resp->result; | |
371 | goto out; | |
372 | } | |
373 | ||
374 | ex_assign_report_general(dev, rg_resp); | |
375 | ||
376 | if (dev->ex_dev.configuring) { | |
377 | SAS_DPRINTK("RG: ex %llx self-configuring...\n", | |
378 | SAS_ADDR(dev->sas_addr)); | |
379 | schedule_timeout_interruptible(5*HZ); | |
380 | } else | |
381 | break; | |
382 | } | |
383 | out: | |
384 | kfree(rg_req); | |
385 | kfree(rg_resp); | |
386 | return res; | |
387 | } | |
388 | ||
389 | static void ex_assign_manuf_info(struct domain_device *dev, void | |
390 | *_mi_resp) | |
391 | { | |
392 | u8 *mi_resp = _mi_resp; | |
393 | struct sas_rphy *rphy = dev->rphy; | |
394 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); | |
395 | ||
396 | memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN); | |
397 | memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN); | |
398 | memcpy(edev->product_rev, mi_resp + 36, | |
399 | SAS_EXPANDER_PRODUCT_REV_LEN); | |
400 | ||
401 | if (mi_resp[8] & 1) { | |
402 | memcpy(edev->component_vendor_id, mi_resp + 40, | |
403 | SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN); | |
404 | edev->component_id = mi_resp[48] << 8 | mi_resp[49]; | |
405 | edev->component_revision_id = mi_resp[50]; | |
406 | } | |
407 | } | |
408 | ||
409 | #define MI_REQ_SIZE 8 | |
410 | #define MI_RESP_SIZE 64 | |
411 | ||
412 | static int sas_ex_manuf_info(struct domain_device *dev) | |
413 | { | |
414 | u8 *mi_req; | |
415 | u8 *mi_resp; | |
416 | int res; | |
417 | ||
418 | mi_req = alloc_smp_req(MI_REQ_SIZE); | |
419 | if (!mi_req) | |
420 | return -ENOMEM; | |
421 | ||
422 | mi_resp = alloc_smp_resp(MI_RESP_SIZE); | |
423 | if (!mi_resp) { | |
424 | kfree(mi_req); | |
425 | return -ENOMEM; | |
426 | } | |
427 | ||
428 | mi_req[1] = SMP_REPORT_MANUF_INFO; | |
429 | ||
430 | res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE); | |
431 | if (res) { | |
432 | SAS_DPRINTK("MI: ex %016llx failed:0x%x\n", | |
433 | SAS_ADDR(dev->sas_addr), res); | |
434 | goto out; | |
435 | } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) { | |
436 | SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n", | |
437 | SAS_ADDR(dev->sas_addr), mi_resp[2]); | |
438 | goto out; | |
439 | } | |
440 | ||
441 | ex_assign_manuf_info(dev, mi_resp); | |
442 | out: | |
443 | kfree(mi_req); | |
444 | kfree(mi_resp); | |
445 | return res; | |
446 | } | |
447 | ||
448 | #define PC_REQ_SIZE 44 | |
449 | #define PC_RESP_SIZE 8 | |
450 | ||
451 | int sas_smp_phy_control(struct domain_device *dev, int phy_id, | |
a01e70e5 JB |
452 | enum phy_func phy_func, |
453 | struct sas_phy_linkrates *rates) | |
2908d778 JB |
454 | { |
455 | u8 *pc_req; | |
456 | u8 *pc_resp; | |
457 | int res; | |
458 | ||
459 | pc_req = alloc_smp_req(PC_REQ_SIZE); | |
460 | if (!pc_req) | |
461 | return -ENOMEM; | |
462 | ||
463 | pc_resp = alloc_smp_resp(PC_RESP_SIZE); | |
464 | if (!pc_resp) { | |
465 | kfree(pc_req); | |
466 | return -ENOMEM; | |
467 | } | |
468 | ||
469 | pc_req[1] = SMP_PHY_CONTROL; | |
470 | pc_req[9] = phy_id; | |
471 | pc_req[10]= phy_func; | |
a01e70e5 JB |
472 | if (rates) { |
473 | pc_req[32] = rates->minimum_linkrate << 4; | |
474 | pc_req[33] = rates->maximum_linkrate << 4; | |
475 | } | |
2908d778 JB |
476 | |
477 | res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE); | |
478 | ||
479 | kfree(pc_resp); | |
480 | kfree(pc_req); | |
481 | return res; | |
482 | } | |
483 | ||
484 | static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) | |
485 | { | |
486 | struct expander_device *ex = &dev->ex_dev; | |
487 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
488 | ||
a01e70e5 | 489 | sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL); |
88edf746 | 490 | phy->linkrate = SAS_PHY_DISABLED; |
2908d778 JB |
491 | } |
492 | ||
493 | static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr) | |
494 | { | |
495 | struct expander_device *ex = &dev->ex_dev; | |
496 | int i; | |
497 | ||
498 | for (i = 0; i < ex->num_phys; i++) { | |
499 | struct ex_phy *phy = &ex->ex_phy[i]; | |
500 | ||
501 | if (phy->phy_state == PHY_VACANT || | |
502 | phy->phy_state == PHY_NOT_PRESENT) | |
503 | continue; | |
504 | ||
505 | if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr)) | |
506 | sas_ex_disable_phy(dev, i); | |
507 | } | |
508 | } | |
509 | ||
510 | static int sas_dev_present_in_domain(struct asd_sas_port *port, | |
511 | u8 *sas_addr) | |
512 | { | |
513 | struct domain_device *dev; | |
514 | ||
515 | if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr)) | |
516 | return 1; | |
517 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
518 | if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr)) | |
519 | return 1; | |
520 | } | |
521 | return 0; | |
522 | } | |
523 | ||
524 | #define RPEL_REQ_SIZE 16 | |
525 | #define RPEL_RESP_SIZE 32 | |
526 | int sas_smp_get_phy_events(struct sas_phy *phy) | |
527 | { | |
528 | int res; | |
92631fa4 JJ |
529 | u8 *req; |
530 | u8 *resp; | |
2908d778 JB |
531 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); |
532 | struct domain_device *dev = sas_find_dev_by_rphy(rphy); | |
2908d778 | 533 | |
92631fa4 JJ |
534 | req = alloc_smp_req(RPEL_REQ_SIZE); |
535 | if (!req) | |
2908d778 JB |
536 | return -ENOMEM; |
537 | ||
92631fa4 JJ |
538 | resp = alloc_smp_resp(RPEL_RESP_SIZE); |
539 | if (!resp) { | |
540 | kfree(req); | |
541 | return -ENOMEM; | |
542 | } | |
543 | ||
2908d778 JB |
544 | req[1] = SMP_REPORT_PHY_ERR_LOG; |
545 | req[9] = phy->number; | |
546 | ||
547 | res = smp_execute_task(dev, req, RPEL_REQ_SIZE, | |
548 | resp, RPEL_RESP_SIZE); | |
549 | ||
550 | if (!res) | |
551 | goto out; | |
552 | ||
553 | phy->invalid_dword_count = scsi_to_u32(&resp[12]); | |
554 | phy->running_disparity_error_count = scsi_to_u32(&resp[16]); | |
555 | phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]); | |
556 | phy->phy_reset_problem_count = scsi_to_u32(&resp[24]); | |
557 | ||
558 | out: | |
559 | kfree(resp); | |
560 | return res; | |
561 | ||
562 | } | |
563 | ||
b9142174 JB |
564 | #ifdef CONFIG_SCSI_SAS_ATA |
565 | ||
2908d778 JB |
566 | #define RPS_REQ_SIZE 16 |
567 | #define RPS_RESP_SIZE 60 | |
568 | ||
569 | static int sas_get_report_phy_sata(struct domain_device *dev, | |
570 | int phy_id, | |
571 | struct smp_resp *rps_resp) | |
572 | { | |
573 | int res; | |
574 | u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE); | |
1acce194 | 575 | u8 *resp = (u8 *)rps_resp; |
2908d778 JB |
576 | |
577 | if (!rps_req) | |
578 | return -ENOMEM; | |
579 | ||
580 | rps_req[1] = SMP_REPORT_PHY_SATA; | |
581 | rps_req[9] = phy_id; | |
582 | ||
583 | res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE, | |
584 | rps_resp, RPS_RESP_SIZE); | |
585 | ||
1acce194 JB |
586 | /* 0x34 is the FIS type for the D2H fis. There's a potential |
587 | * standards cockup here. sas-2 explicitly specifies the FIS | |
588 | * should be encoded so that FIS type is in resp[24]. | |
589 | * However, some expanders endian reverse this. Undo the | |
590 | * reversal here */ | |
591 | if (!res && resp[27] == 0x34 && resp[24] != 0x34) { | |
592 | int i; | |
593 | ||
594 | for (i = 0; i < 5; i++) { | |
595 | int j = 24 + (i*4); | |
596 | u8 a, b; | |
597 | a = resp[j + 0]; | |
598 | b = resp[j + 1]; | |
599 | resp[j + 0] = resp[j + 3]; | |
600 | resp[j + 1] = resp[j + 2]; | |
601 | resp[j + 2] = b; | |
602 | resp[j + 3] = a; | |
603 | } | |
604 | } | |
605 | ||
2908d778 | 606 | kfree(rps_req); |
1acce194 | 607 | return res; |
2908d778 | 608 | } |
b9142174 | 609 | #endif |
2908d778 JB |
610 | |
611 | static void sas_ex_get_linkrate(struct domain_device *parent, | |
612 | struct domain_device *child, | |
613 | struct ex_phy *parent_phy) | |
614 | { | |
615 | struct expander_device *parent_ex = &parent->ex_dev; | |
616 | struct sas_port *port; | |
617 | int i; | |
618 | ||
619 | child->pathways = 0; | |
620 | ||
621 | port = parent_phy->port; | |
622 | ||
623 | for (i = 0; i < parent_ex->num_phys; i++) { | |
624 | struct ex_phy *phy = &parent_ex->ex_phy[i]; | |
625 | ||
626 | if (phy->phy_state == PHY_VACANT || | |
627 | phy->phy_state == PHY_NOT_PRESENT) | |
628 | continue; | |
629 | ||
630 | if (SAS_ADDR(phy->attached_sas_addr) == | |
631 | SAS_ADDR(child->sas_addr)) { | |
632 | ||
633 | child->min_linkrate = min(parent->min_linkrate, | |
634 | phy->linkrate); | |
635 | child->max_linkrate = max(parent->max_linkrate, | |
636 | phy->linkrate); | |
637 | child->pathways++; | |
638 | sas_port_add_phy(port, phy->phy); | |
639 | } | |
640 | } | |
641 | child->linkrate = min(parent_phy->linkrate, child->max_linkrate); | |
642 | child->pathways = min(child->pathways, parent->pathways); | |
643 | } | |
644 | ||
645 | static struct domain_device *sas_ex_discover_end_dev( | |
646 | struct domain_device *parent, int phy_id) | |
647 | { | |
648 | struct expander_device *parent_ex = &parent->ex_dev; | |
649 | struct ex_phy *phy = &parent_ex->ex_phy[phy_id]; | |
650 | struct domain_device *child = NULL; | |
651 | struct sas_rphy *rphy; | |
652 | int res; | |
653 | ||
654 | if (phy->attached_sata_host || phy->attached_sata_ps) | |
655 | return NULL; | |
656 | ||
657 | child = kzalloc(sizeof(*child), GFP_KERNEL); | |
658 | if (!child) | |
659 | return NULL; | |
660 | ||
661 | child->parent = parent; | |
662 | child->port = parent->port; | |
663 | child->iproto = phy->attached_iproto; | |
664 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
665 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); | |
024879ea JB |
666 | if (!phy->port) { |
667 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); | |
668 | if (unlikely(!phy->port)) | |
669 | goto out_err; | |
670 | if (unlikely(sas_port_add(phy->port) != 0)) { | |
671 | sas_port_free(phy->port); | |
672 | goto out_err; | |
673 | } | |
674 | } | |
2908d778 JB |
675 | sas_ex_get_linkrate(parent, child, phy); |
676 | ||
b9142174 | 677 | #ifdef CONFIG_SCSI_SAS_ATA |
5929faf3 | 678 | if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) { |
2908d778 | 679 | child->dev_type = SATA_DEV; |
5929faf3 | 680 | if (phy->attached_tproto & SAS_PROTOCOL_STP) |
2908d778 JB |
681 | child->tproto = phy->attached_tproto; |
682 | if (phy->attached_sata_dev) | |
683 | child->tproto |= SATA_DEV; | |
684 | res = sas_get_report_phy_sata(parent, phy_id, | |
685 | &child->sata_dev.rps_resp); | |
686 | if (res) { | |
687 | SAS_DPRINTK("report phy sata to %016llx:0x%x returned " | |
688 | "0x%x\n", SAS_ADDR(parent->sas_addr), | |
689 | phy_id, res); | |
024879ea | 690 | goto out_free; |
2908d778 JB |
691 | } |
692 | memcpy(child->frame_rcvd, &child->sata_dev.rps_resp.rps.fis, | |
693 | sizeof(struct dev_to_host_fis)); | |
1acce194 JB |
694 | |
695 | rphy = sas_end_device_alloc(phy->port); | |
528fd552 JB |
696 | if (unlikely(!rphy)) |
697 | goto out_free; | |
1acce194 | 698 | |
2908d778 | 699 | sas_init_dev(child); |
1acce194 JB |
700 | |
701 | child->rphy = rphy; | |
702 | ||
9d720d82 | 703 | spin_lock_irq(&parent->port->dev_list_lock); |
1acce194 | 704 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
9d720d82 | 705 | spin_unlock_irq(&parent->port->dev_list_lock); |
1acce194 | 706 | |
2908d778 JB |
707 | res = sas_discover_sata(child); |
708 | if (res) { | |
709 | SAS_DPRINTK("sas_discover_sata() for device %16llx at " | |
710 | "%016llx:0x%x returned 0x%x\n", | |
711 | SAS_ADDR(child->sas_addr), | |
712 | SAS_ADDR(parent->sas_addr), phy_id, res); | |
1acce194 | 713 | goto out_list_del; |
2908d778 | 714 | } |
b9142174 JB |
715 | } else |
716 | #endif | |
5929faf3 | 717 | if (phy->attached_tproto & SAS_PROTOCOL_SSP) { |
2908d778 JB |
718 | child->dev_type = SAS_END_DEV; |
719 | rphy = sas_end_device_alloc(phy->port); | |
720 | /* FIXME: error handling */ | |
024879ea JB |
721 | if (unlikely(!rphy)) |
722 | goto out_free; | |
2908d778 JB |
723 | child->tproto = phy->attached_tproto; |
724 | sas_init_dev(child); | |
725 | ||
726 | child->rphy = rphy; | |
727 | sas_fill_in_rphy(child, rphy); | |
728 | ||
9d720d82 | 729 | spin_lock_irq(&parent->port->dev_list_lock); |
2908d778 | 730 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
9d720d82 | 731 | spin_unlock_irq(&parent->port->dev_list_lock); |
2908d778 JB |
732 | |
733 | res = sas_discover_end_dev(child); | |
734 | if (res) { | |
735 | SAS_DPRINTK("sas_discover_end_dev() for device %16llx " | |
736 | "at %016llx:0x%x returned 0x%x\n", | |
737 | SAS_ADDR(child->sas_addr), | |
738 | SAS_ADDR(parent->sas_addr), phy_id, res); | |
024879ea | 739 | goto out_list_del; |
2908d778 JB |
740 | } |
741 | } else { | |
742 | SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n", | |
743 | phy->attached_tproto, SAS_ADDR(parent->sas_addr), | |
744 | phy_id); | |
b9142174 | 745 | goto out_free; |
2908d778 JB |
746 | } |
747 | ||
748 | list_add_tail(&child->siblings, &parent_ex->children); | |
749 | return child; | |
024879ea JB |
750 | |
751 | out_list_del: | |
6f63caae DW |
752 | sas_rphy_free(child->rphy); |
753 | child->rphy = NULL; | |
024879ea | 754 | list_del(&child->dev_list_node); |
024879ea JB |
755 | out_free: |
756 | sas_port_delete(phy->port); | |
757 | out_err: | |
758 | phy->port = NULL; | |
759 | kfree(child); | |
760 | return NULL; | |
2908d778 JB |
761 | } |
762 | ||
423f7cf4 DW |
763 | /* See if this phy is part of a wide port */ |
764 | static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id) | |
765 | { | |
766 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; | |
767 | int i; | |
768 | ||
769 | for (i = 0; i < parent->ex_dev.num_phys; i++) { | |
770 | struct ex_phy *ephy = &parent->ex_dev.ex_phy[i]; | |
771 | ||
772 | if (ephy == phy) | |
773 | continue; | |
774 | ||
775 | if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr, | |
776 | SAS_ADDR_SIZE) && ephy->port) { | |
777 | sas_port_add_phy(ephy->port, phy->phy); | |
19252de6 | 778 | phy->port = ephy->port; |
423f7cf4 DW |
779 | phy->phy_state = PHY_DEVICE_DISCOVERED; |
780 | return 0; | |
781 | } | |
782 | } | |
783 | ||
784 | return -ENODEV; | |
785 | } | |
786 | ||
2908d778 JB |
787 | static struct domain_device *sas_ex_discover_expander( |
788 | struct domain_device *parent, int phy_id) | |
789 | { | |
790 | struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy); | |
791 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; | |
792 | struct domain_device *child = NULL; | |
793 | struct sas_rphy *rphy; | |
794 | struct sas_expander_device *edev; | |
795 | struct asd_sas_port *port; | |
796 | int res; | |
797 | ||
798 | if (phy->routing_attr == DIRECT_ROUTING) { | |
799 | SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not " | |
800 | "allowed\n", | |
801 | SAS_ADDR(parent->sas_addr), phy_id, | |
802 | SAS_ADDR(phy->attached_sas_addr), | |
803 | phy->attached_phy_id); | |
804 | return NULL; | |
805 | } | |
806 | child = kzalloc(sizeof(*child), GFP_KERNEL); | |
807 | if (!child) | |
808 | return NULL; | |
809 | ||
810 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); | |
811 | /* FIXME: better error handling */ | |
812 | BUG_ON(sas_port_add(phy->port) != 0); | |
813 | ||
814 | ||
815 | switch (phy->attached_dev_type) { | |
816 | case EDGE_DEV: | |
817 | rphy = sas_expander_alloc(phy->port, | |
818 | SAS_EDGE_EXPANDER_DEVICE); | |
819 | break; | |
820 | case FANOUT_DEV: | |
821 | rphy = sas_expander_alloc(phy->port, | |
822 | SAS_FANOUT_EXPANDER_DEVICE); | |
823 | break; | |
824 | default: | |
825 | rphy = NULL; /* shut gcc up */ | |
826 | BUG(); | |
827 | } | |
828 | port = parent->port; | |
829 | child->rphy = rphy; | |
830 | edev = rphy_to_expander_device(rphy); | |
831 | child->dev_type = phy->attached_dev_type; | |
832 | child->parent = parent; | |
833 | child->port = port; | |
834 | child->iproto = phy->attached_iproto; | |
835 | child->tproto = phy->attached_tproto; | |
836 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); | |
837 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); | |
838 | sas_ex_get_linkrate(parent, child, phy); | |
839 | edev->level = parent_ex->level + 1; | |
840 | parent->port->disc.max_level = max(parent->port->disc.max_level, | |
841 | edev->level); | |
842 | sas_init_dev(child); | |
843 | sas_fill_in_rphy(child, rphy); | |
844 | sas_rphy_add(rphy); | |
845 | ||
9d720d82 | 846 | spin_lock_irq(&parent->port->dev_list_lock); |
2908d778 | 847 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
9d720d82 | 848 | spin_unlock_irq(&parent->port->dev_list_lock); |
2908d778 JB |
849 | |
850 | res = sas_discover_expander(child); | |
851 | if (res) { | |
852 | kfree(child); | |
853 | return NULL; | |
854 | } | |
855 | list_add_tail(&child->siblings, &parent->ex_dev.children); | |
856 | return child; | |
857 | } | |
858 | ||
859 | static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) | |
860 | { | |
861 | struct expander_device *ex = &dev->ex_dev; | |
862 | struct ex_phy *ex_phy = &ex->ex_phy[phy_id]; | |
863 | struct domain_device *child = NULL; | |
864 | int res = 0; | |
865 | ||
866 | /* Phy state */ | |
88edf746 | 867 | if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) { |
a01e70e5 | 868 | if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL)) |
2908d778 JB |
869 | res = sas_ex_phy_discover(dev, phy_id); |
870 | if (res) | |
871 | return res; | |
872 | } | |
873 | ||
874 | /* Parent and domain coherency */ | |
875 | if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == | |
876 | SAS_ADDR(dev->port->sas_addr))) { | |
877 | sas_add_parent_port(dev, phy_id); | |
878 | return 0; | |
879 | } | |
880 | if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == | |
881 | SAS_ADDR(dev->parent->sas_addr))) { | |
882 | sas_add_parent_port(dev, phy_id); | |
883 | if (ex_phy->routing_attr == TABLE_ROUTING) | |
884 | sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1); | |
885 | return 0; | |
886 | } | |
887 | ||
888 | if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr)) | |
889 | sas_ex_disable_port(dev, ex_phy->attached_sas_addr); | |
890 | ||
891 | if (ex_phy->attached_dev_type == NO_DEVICE) { | |
892 | if (ex_phy->routing_attr == DIRECT_ROUTING) { | |
893 | memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE); | |
894 | sas_configure_routing(dev, ex_phy->attached_sas_addr); | |
895 | } | |
896 | return 0; | |
88edf746 | 897 | } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN) |
2908d778 JB |
898 | return 0; |
899 | ||
900 | if (ex_phy->attached_dev_type != SAS_END_DEV && | |
901 | ex_phy->attached_dev_type != FANOUT_DEV && | |
902 | ex_phy->attached_dev_type != EDGE_DEV) { | |
903 | SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx " | |
904 | "phy 0x%x\n", ex_phy->attached_dev_type, | |
905 | SAS_ADDR(dev->sas_addr), | |
906 | phy_id); | |
907 | return 0; | |
908 | } | |
909 | ||
910 | res = sas_configure_routing(dev, ex_phy->attached_sas_addr); | |
911 | if (res) { | |
912 | SAS_DPRINTK("configure routing for dev %016llx " | |
913 | "reported 0x%x. Forgotten\n", | |
914 | SAS_ADDR(ex_phy->attached_sas_addr), res); | |
915 | sas_disable_routing(dev, ex_phy->attached_sas_addr); | |
916 | return res; | |
917 | } | |
918 | ||
423f7cf4 DW |
919 | res = sas_ex_join_wide_port(dev, phy_id); |
920 | if (!res) { | |
921 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", | |
922 | phy_id, SAS_ADDR(ex_phy->attached_sas_addr)); | |
923 | return res; | |
924 | } | |
925 | ||
2908d778 JB |
926 | switch (ex_phy->attached_dev_type) { |
927 | case SAS_END_DEV: | |
928 | child = sas_ex_discover_end_dev(dev, phy_id); | |
929 | break; | |
930 | case FANOUT_DEV: | |
931 | if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) { | |
932 | SAS_DPRINTK("second fanout expander %016llx phy 0x%x " | |
933 | "attached to ex %016llx phy 0x%x\n", | |
934 | SAS_ADDR(ex_phy->attached_sas_addr), | |
935 | ex_phy->attached_phy_id, | |
936 | SAS_ADDR(dev->sas_addr), | |
937 | phy_id); | |
938 | sas_ex_disable_phy(dev, phy_id); | |
939 | break; | |
940 | } else | |
941 | memcpy(dev->port->disc.fanout_sas_addr, | |
942 | ex_phy->attached_sas_addr, SAS_ADDR_SIZE); | |
943 | /* fallthrough */ | |
944 | case EDGE_DEV: | |
945 | child = sas_ex_discover_expander(dev, phy_id); | |
946 | break; | |
947 | default: | |
948 | break; | |
949 | } | |
950 | ||
951 | if (child) { | |
952 | int i; | |
953 | ||
954 | for (i = 0; i < ex->num_phys; i++) { | |
955 | if (ex->ex_phy[i].phy_state == PHY_VACANT || | |
956 | ex->ex_phy[i].phy_state == PHY_NOT_PRESENT) | |
957 | continue; | |
19252de6 TP |
958 | /* |
959 | * Due to races, the phy might not get added to the | |
960 | * wide port, so we add the phy to the wide port here. | |
961 | */ | |
2908d778 | 962 | if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) == |
19252de6 | 963 | SAS_ADDR(child->sas_addr)) { |
2908d778 | 964 | ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED; |
19252de6 TP |
965 | res = sas_ex_join_wide_port(dev, i); |
966 | if (!res) | |
967 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", | |
968 | i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr)); | |
969 | ||
970 | } | |
2908d778 JB |
971 | } |
972 | } | |
973 | ||
974 | return res; | |
975 | } | |
976 | ||
977 | static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr) | |
978 | { | |
979 | struct expander_device *ex = &dev->ex_dev; | |
980 | int i; | |
981 | ||
982 | for (i = 0; i < ex->num_phys; i++) { | |
983 | struct ex_phy *phy = &ex->ex_phy[i]; | |
984 | ||
985 | if (phy->phy_state == PHY_VACANT || | |
986 | phy->phy_state == PHY_NOT_PRESENT) | |
987 | continue; | |
988 | ||
989 | if ((phy->attached_dev_type == EDGE_DEV || | |
990 | phy->attached_dev_type == FANOUT_DEV) && | |
991 | phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
992 | ||
993 | memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE); | |
994 | ||
995 | return 1; | |
996 | } | |
997 | } | |
998 | return 0; | |
999 | } | |
1000 | ||
1001 | static int sas_check_level_subtractive_boundary(struct domain_device *dev) | |
1002 | { | |
1003 | struct expander_device *ex = &dev->ex_dev; | |
1004 | struct domain_device *child; | |
1005 | u8 sub_addr[8] = {0, }; | |
1006 | ||
1007 | list_for_each_entry(child, &ex->children, siblings) { | |
1008 | if (child->dev_type != EDGE_DEV && | |
1009 | child->dev_type != FANOUT_DEV) | |
1010 | continue; | |
1011 | if (sub_addr[0] == 0) { | |
1012 | sas_find_sub_addr(child, sub_addr); | |
1013 | continue; | |
1014 | } else { | |
1015 | u8 s2[8]; | |
1016 | ||
1017 | if (sas_find_sub_addr(child, s2) && | |
1018 | (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) { | |
1019 | ||
1020 | SAS_DPRINTK("ex %016llx->%016llx-?->%016llx " | |
1021 | "diverges from subtractive " | |
1022 | "boundary %016llx\n", | |
1023 | SAS_ADDR(dev->sas_addr), | |
1024 | SAS_ADDR(child->sas_addr), | |
1025 | SAS_ADDR(s2), | |
1026 | SAS_ADDR(sub_addr)); | |
1027 | ||
1028 | sas_ex_disable_port(child, s2); | |
1029 | } | |
1030 | } | |
1031 | } | |
1032 | return 0; | |
1033 | } | |
1034 | /** | |
1035 | * sas_ex_discover_devices -- discover devices attached to this expander | |
1036 | * dev: pointer to the expander domain device | |
1037 | * single: if you want to do a single phy, else set to -1; | |
1038 | * | |
1039 | * Configure this expander for use with its devices and register the | |
1040 | * devices of this expander. | |
1041 | */ | |
1042 | static int sas_ex_discover_devices(struct domain_device *dev, int single) | |
1043 | { | |
1044 | struct expander_device *ex = &dev->ex_dev; | |
1045 | int i = 0, end = ex->num_phys; | |
1046 | int res = 0; | |
1047 | ||
1048 | if (0 <= single && single < end) { | |
1049 | i = single; | |
1050 | end = i+1; | |
1051 | } | |
1052 | ||
1053 | for ( ; i < end; i++) { | |
1054 | struct ex_phy *ex_phy = &ex->ex_phy[i]; | |
1055 | ||
1056 | if (ex_phy->phy_state == PHY_VACANT || | |
1057 | ex_phy->phy_state == PHY_NOT_PRESENT || | |
1058 | ex_phy->phy_state == PHY_DEVICE_DISCOVERED) | |
1059 | continue; | |
1060 | ||
1061 | switch (ex_phy->linkrate) { | |
88edf746 JB |
1062 | case SAS_PHY_DISABLED: |
1063 | case SAS_PHY_RESET_PROBLEM: | |
1064 | case SAS_SATA_PORT_SELECTOR: | |
2908d778 JB |
1065 | continue; |
1066 | default: | |
1067 | res = sas_ex_discover_dev(dev, i); | |
1068 | if (res) | |
1069 | break; | |
1070 | continue; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | if (!res) | |
1075 | sas_check_level_subtractive_boundary(dev); | |
1076 | ||
1077 | return res; | |
1078 | } | |
1079 | ||
1080 | static int sas_check_ex_subtractive_boundary(struct domain_device *dev) | |
1081 | { | |
1082 | struct expander_device *ex = &dev->ex_dev; | |
1083 | int i; | |
1084 | u8 *sub_sas_addr = NULL; | |
1085 | ||
1086 | if (dev->dev_type != EDGE_DEV) | |
1087 | return 0; | |
1088 | ||
1089 | for (i = 0; i < ex->num_phys; i++) { | |
1090 | struct ex_phy *phy = &ex->ex_phy[i]; | |
1091 | ||
1092 | if (phy->phy_state == PHY_VACANT || | |
1093 | phy->phy_state == PHY_NOT_PRESENT) | |
1094 | continue; | |
1095 | ||
1096 | if ((phy->attached_dev_type == FANOUT_DEV || | |
1097 | phy->attached_dev_type == EDGE_DEV) && | |
1098 | phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1099 | ||
1100 | if (!sub_sas_addr) | |
1101 | sub_sas_addr = &phy->attached_sas_addr[0]; | |
1102 | else if (SAS_ADDR(sub_sas_addr) != | |
1103 | SAS_ADDR(phy->attached_sas_addr)) { | |
1104 | ||
1105 | SAS_DPRINTK("ex %016llx phy 0x%x " | |
1106 | "diverges(%016llx) on subtractive " | |
1107 | "boundary(%016llx). Disabled\n", | |
1108 | SAS_ADDR(dev->sas_addr), i, | |
1109 | SAS_ADDR(phy->attached_sas_addr), | |
1110 | SAS_ADDR(sub_sas_addr)); | |
1111 | sas_ex_disable_phy(dev, i); | |
1112 | } | |
1113 | } | |
1114 | } | |
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | static void sas_print_parent_topology_bug(struct domain_device *child, | |
1119 | struct ex_phy *parent_phy, | |
1120 | struct ex_phy *child_phy) | |
1121 | { | |
1122 | static const char ra_char[] = { | |
1123 | [DIRECT_ROUTING] = 'D', | |
1124 | [SUBTRACTIVE_ROUTING] = 'S', | |
1125 | [TABLE_ROUTING] = 'T', | |
1126 | }; | |
1127 | static const char *ex_type[] = { | |
1128 | [EDGE_DEV] = "edge", | |
1129 | [FANOUT_DEV] = "fanout", | |
1130 | }; | |
1131 | struct domain_device *parent = child->parent; | |
1132 | ||
1133 | sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx phy 0x%x " | |
1134 | "has %c:%c routing link!\n", | |
1135 | ||
1136 | ex_type[parent->dev_type], | |
1137 | SAS_ADDR(parent->sas_addr), | |
1138 | parent_phy->phy_id, | |
1139 | ||
1140 | ex_type[child->dev_type], | |
1141 | SAS_ADDR(child->sas_addr), | |
1142 | child_phy->phy_id, | |
1143 | ||
1144 | ra_char[parent_phy->routing_attr], | |
1145 | ra_char[child_phy->routing_attr]); | |
1146 | } | |
1147 | ||
1148 | static int sas_check_eeds(struct domain_device *child, | |
1149 | struct ex_phy *parent_phy, | |
1150 | struct ex_phy *child_phy) | |
1151 | { | |
1152 | int res = 0; | |
1153 | struct domain_device *parent = child->parent; | |
1154 | ||
1155 | if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) { | |
1156 | res = -ENODEV; | |
1157 | SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx " | |
1158 | "phy S:0x%x, while there is a fanout ex %016llx\n", | |
1159 | SAS_ADDR(parent->sas_addr), | |
1160 | parent_phy->phy_id, | |
1161 | SAS_ADDR(child->sas_addr), | |
1162 | child_phy->phy_id, | |
1163 | SAS_ADDR(parent->port->disc.fanout_sas_addr)); | |
1164 | } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) { | |
1165 | memcpy(parent->port->disc.eeds_a, parent->sas_addr, | |
1166 | SAS_ADDR_SIZE); | |
1167 | memcpy(parent->port->disc.eeds_b, child->sas_addr, | |
1168 | SAS_ADDR_SIZE); | |
1169 | } else if (((SAS_ADDR(parent->port->disc.eeds_a) == | |
1170 | SAS_ADDR(parent->sas_addr)) || | |
1171 | (SAS_ADDR(parent->port->disc.eeds_a) == | |
1172 | SAS_ADDR(child->sas_addr))) | |
1173 | && | |
1174 | ((SAS_ADDR(parent->port->disc.eeds_b) == | |
1175 | SAS_ADDR(parent->sas_addr)) || | |
1176 | (SAS_ADDR(parent->port->disc.eeds_b) == | |
1177 | SAS_ADDR(child->sas_addr)))) | |
1178 | ; | |
1179 | else { | |
1180 | res = -ENODEV; | |
1181 | SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx " | |
1182 | "phy 0x%x link forms a third EEDS!\n", | |
1183 | SAS_ADDR(parent->sas_addr), | |
1184 | parent_phy->phy_id, | |
1185 | SAS_ADDR(child->sas_addr), | |
1186 | child_phy->phy_id); | |
1187 | } | |
1188 | ||
1189 | return res; | |
1190 | } | |
1191 | ||
1192 | /* Here we spill over 80 columns. It is intentional. | |
1193 | */ | |
1194 | static int sas_check_parent_topology(struct domain_device *child) | |
1195 | { | |
1196 | struct expander_device *child_ex = &child->ex_dev; | |
1197 | struct expander_device *parent_ex; | |
1198 | int i; | |
1199 | int res = 0; | |
1200 | ||
1201 | if (!child->parent) | |
1202 | return 0; | |
1203 | ||
1204 | if (child->parent->dev_type != EDGE_DEV && | |
1205 | child->parent->dev_type != FANOUT_DEV) | |
1206 | return 0; | |
1207 | ||
1208 | parent_ex = &child->parent->ex_dev; | |
1209 | ||
1210 | for (i = 0; i < parent_ex->num_phys; i++) { | |
1211 | struct ex_phy *parent_phy = &parent_ex->ex_phy[i]; | |
1212 | struct ex_phy *child_phy; | |
1213 | ||
1214 | if (parent_phy->phy_state == PHY_VACANT || | |
1215 | parent_phy->phy_state == PHY_NOT_PRESENT) | |
1216 | continue; | |
1217 | ||
1218 | if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr)) | |
1219 | continue; | |
1220 | ||
1221 | child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; | |
1222 | ||
1223 | switch (child->parent->dev_type) { | |
1224 | case EDGE_DEV: | |
1225 | if (child->dev_type == FANOUT_DEV) { | |
1226 | if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || | |
1227 | child_phy->routing_attr != TABLE_ROUTING) { | |
1228 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1229 | res = -ENODEV; | |
1230 | } | |
1231 | } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1232 | if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) { | |
1233 | res = sas_check_eeds(child, parent_phy, child_phy); | |
1234 | } else if (child_phy->routing_attr != TABLE_ROUTING) { | |
1235 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1236 | res = -ENODEV; | |
1237 | } | |
1238 | } else if (parent_phy->routing_attr == TABLE_ROUTING && | |
1239 | child_phy->routing_attr != SUBTRACTIVE_ROUTING) { | |
1240 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1241 | res = -ENODEV; | |
1242 | } | |
1243 | break; | |
1244 | case FANOUT_DEV: | |
1245 | if (parent_phy->routing_attr != TABLE_ROUTING || | |
1246 | child_phy->routing_attr != SUBTRACTIVE_ROUTING) { | |
1247 | sas_print_parent_topology_bug(child, parent_phy, child_phy); | |
1248 | res = -ENODEV; | |
1249 | } | |
1250 | break; | |
1251 | default: | |
1252 | break; | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | return res; | |
1257 | } | |
1258 | ||
1259 | #define RRI_REQ_SIZE 16 | |
1260 | #define RRI_RESP_SIZE 44 | |
1261 | ||
1262 | static int sas_configure_present(struct domain_device *dev, int phy_id, | |
1263 | u8 *sas_addr, int *index, int *present) | |
1264 | { | |
1265 | int i, res = 0; | |
1266 | struct expander_device *ex = &dev->ex_dev; | |
1267 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
1268 | u8 *rri_req; | |
1269 | u8 *rri_resp; | |
1270 | ||
1271 | *present = 0; | |
1272 | *index = 0; | |
1273 | ||
1274 | rri_req = alloc_smp_req(RRI_REQ_SIZE); | |
1275 | if (!rri_req) | |
1276 | return -ENOMEM; | |
1277 | ||
1278 | rri_resp = alloc_smp_resp(RRI_RESP_SIZE); | |
1279 | if (!rri_resp) { | |
1280 | kfree(rri_req); | |
1281 | return -ENOMEM; | |
1282 | } | |
1283 | ||
1284 | rri_req[1] = SMP_REPORT_ROUTE_INFO; | |
1285 | rri_req[9] = phy_id; | |
1286 | ||
1287 | for (i = 0; i < ex->max_route_indexes ; i++) { | |
1288 | *(__be16 *)(rri_req+6) = cpu_to_be16(i); | |
1289 | res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp, | |
1290 | RRI_RESP_SIZE); | |
1291 | if (res) | |
1292 | goto out; | |
1293 | res = rri_resp[2]; | |
1294 | if (res == SMP_RESP_NO_INDEX) { | |
1295 | SAS_DPRINTK("overflow of indexes: dev %016llx " | |
1296 | "phy 0x%x index 0x%x\n", | |
1297 | SAS_ADDR(dev->sas_addr), phy_id, i); | |
1298 | goto out; | |
1299 | } else if (res != SMP_RESP_FUNC_ACC) { | |
1300 | SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x " | |
cadbd4a5 | 1301 | "result 0x%x\n", __func__, |
2908d778 JB |
1302 | SAS_ADDR(dev->sas_addr), phy_id, i, res); |
1303 | goto out; | |
1304 | } | |
1305 | if (SAS_ADDR(sas_addr) != 0) { | |
1306 | if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) { | |
1307 | *index = i; | |
1308 | if ((rri_resp[12] & 0x80) == 0x80) | |
1309 | *present = 0; | |
1310 | else | |
1311 | *present = 1; | |
1312 | goto out; | |
1313 | } else if (SAS_ADDR(rri_resp+16) == 0) { | |
1314 | *index = i; | |
1315 | *present = 0; | |
1316 | goto out; | |
1317 | } | |
1318 | } else if (SAS_ADDR(rri_resp+16) == 0 && | |
1319 | phy->last_da_index < i) { | |
1320 | phy->last_da_index = i; | |
1321 | *index = i; | |
1322 | *present = 0; | |
1323 | goto out; | |
1324 | } | |
1325 | } | |
1326 | res = -1; | |
1327 | out: | |
1328 | kfree(rri_req); | |
1329 | kfree(rri_resp); | |
1330 | return res; | |
1331 | } | |
1332 | ||
1333 | #define CRI_REQ_SIZE 44 | |
1334 | #define CRI_RESP_SIZE 8 | |
1335 | ||
1336 | static int sas_configure_set(struct domain_device *dev, int phy_id, | |
1337 | u8 *sas_addr, int index, int include) | |
1338 | { | |
1339 | int res; | |
1340 | u8 *cri_req; | |
1341 | u8 *cri_resp; | |
1342 | ||
1343 | cri_req = alloc_smp_req(CRI_REQ_SIZE); | |
1344 | if (!cri_req) | |
1345 | return -ENOMEM; | |
1346 | ||
1347 | cri_resp = alloc_smp_resp(CRI_RESP_SIZE); | |
1348 | if (!cri_resp) { | |
1349 | kfree(cri_req); | |
1350 | return -ENOMEM; | |
1351 | } | |
1352 | ||
1353 | cri_req[1] = SMP_CONF_ROUTE_INFO; | |
1354 | *(__be16 *)(cri_req+6) = cpu_to_be16(index); | |
1355 | cri_req[9] = phy_id; | |
1356 | if (SAS_ADDR(sas_addr) == 0 || !include) | |
1357 | cri_req[12] |= 0x80; | |
1358 | memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE); | |
1359 | ||
1360 | res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp, | |
1361 | CRI_RESP_SIZE); | |
1362 | if (res) | |
1363 | goto out; | |
1364 | res = cri_resp[2]; | |
1365 | if (res == SMP_RESP_NO_INDEX) { | |
1366 | SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x " | |
1367 | "index 0x%x\n", | |
1368 | SAS_ADDR(dev->sas_addr), phy_id, index); | |
1369 | } | |
1370 | out: | |
1371 | kfree(cri_req); | |
1372 | kfree(cri_resp); | |
1373 | return res; | |
1374 | } | |
1375 | ||
1376 | static int sas_configure_phy(struct domain_device *dev, int phy_id, | |
1377 | u8 *sas_addr, int include) | |
1378 | { | |
1379 | int index; | |
1380 | int present; | |
1381 | int res; | |
1382 | ||
1383 | res = sas_configure_present(dev, phy_id, sas_addr, &index, &present); | |
1384 | if (res) | |
1385 | return res; | |
1386 | if (include ^ present) | |
1387 | return sas_configure_set(dev, phy_id, sas_addr, index,include); | |
1388 | ||
1389 | return res; | |
1390 | } | |
1391 | ||
1392 | /** | |
1393 | * sas_configure_parent -- configure routing table of parent | |
1394 | * parent: parent expander | |
1395 | * child: child expander | |
1396 | * sas_addr: SAS port identifier of device directly attached to child | |
1397 | */ | |
1398 | static int sas_configure_parent(struct domain_device *parent, | |
1399 | struct domain_device *child, | |
1400 | u8 *sas_addr, int include) | |
1401 | { | |
1402 | struct expander_device *ex_parent = &parent->ex_dev; | |
1403 | int res = 0; | |
1404 | int i; | |
1405 | ||
1406 | if (parent->parent) { | |
1407 | res = sas_configure_parent(parent->parent, parent, sas_addr, | |
1408 | include); | |
1409 | if (res) | |
1410 | return res; | |
1411 | } | |
1412 | ||
1413 | if (ex_parent->conf_route_table == 0) { | |
1414 | SAS_DPRINTK("ex %016llx has self-configuring routing table\n", | |
1415 | SAS_ADDR(parent->sas_addr)); | |
1416 | return 0; | |
1417 | } | |
1418 | ||
1419 | for (i = 0; i < ex_parent->num_phys; i++) { | |
1420 | struct ex_phy *phy = &ex_parent->ex_phy[i]; | |
1421 | ||
1422 | if ((phy->routing_attr == TABLE_ROUTING) && | |
1423 | (SAS_ADDR(phy->attached_sas_addr) == | |
1424 | SAS_ADDR(child->sas_addr))) { | |
1425 | res = sas_configure_phy(parent, i, sas_addr, include); | |
1426 | if (res) | |
1427 | return res; | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | return res; | |
1432 | } | |
1433 | ||
1434 | /** | |
1435 | * sas_configure_routing -- configure routing | |
1436 | * dev: expander device | |
1437 | * sas_addr: port identifier of device directly attached to the expander device | |
1438 | */ | |
1439 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr) | |
1440 | { | |
1441 | if (dev->parent) | |
1442 | return sas_configure_parent(dev->parent, dev, sas_addr, 1); | |
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr) | |
1447 | { | |
1448 | if (dev->parent) | |
1449 | return sas_configure_parent(dev->parent, dev, sas_addr, 0); | |
1450 | return 0; | |
1451 | } | |
1452 | ||
2908d778 JB |
1453 | /** |
1454 | * sas_discover_expander -- expander discovery | |
1455 | * @ex: pointer to expander domain device | |
1456 | * | |
1457 | * See comment in sas_discover_sata(). | |
1458 | */ | |
1459 | static int sas_discover_expander(struct domain_device *dev) | |
1460 | { | |
1461 | int res; | |
1462 | ||
1463 | res = sas_notify_lldd_dev_found(dev); | |
1464 | if (res) | |
1465 | return res; | |
1466 | ||
1467 | res = sas_ex_general(dev); | |
1468 | if (res) | |
1469 | goto out_err; | |
1470 | res = sas_ex_manuf_info(dev); | |
1471 | if (res) | |
1472 | goto out_err; | |
1473 | ||
1474 | res = sas_expander_discover(dev); | |
1475 | if (res) { | |
1476 | SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n", | |
1477 | SAS_ADDR(dev->sas_addr), res); | |
1478 | goto out_err; | |
1479 | } | |
1480 | ||
1481 | sas_check_ex_subtractive_boundary(dev); | |
1482 | res = sas_check_parent_topology(dev); | |
1483 | if (res) | |
1484 | goto out_err; | |
1485 | return 0; | |
1486 | out_err: | |
1487 | sas_notify_lldd_dev_gone(dev); | |
1488 | return res; | |
1489 | } | |
1490 | ||
1491 | static int sas_ex_level_discovery(struct asd_sas_port *port, const int level) | |
1492 | { | |
1493 | int res = 0; | |
1494 | struct domain_device *dev; | |
1495 | ||
1496 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
1497 | if (dev->dev_type == EDGE_DEV || | |
1498 | dev->dev_type == FANOUT_DEV) { | |
1499 | struct sas_expander_device *ex = | |
1500 | rphy_to_expander_device(dev->rphy); | |
1501 | ||
1502 | if (level == ex->level) | |
1503 | res = sas_ex_discover_devices(dev, -1); | |
1504 | else if (level > 0) | |
1505 | res = sas_ex_discover_devices(port->port_dev, -1); | |
1506 | ||
1507 | } | |
1508 | } | |
1509 | ||
1510 | return res; | |
1511 | } | |
1512 | ||
1513 | static int sas_ex_bfs_disc(struct asd_sas_port *port) | |
1514 | { | |
1515 | int res; | |
1516 | int level; | |
1517 | ||
1518 | do { | |
1519 | level = port->disc.max_level; | |
1520 | res = sas_ex_level_discovery(port, level); | |
1521 | mb(); | |
1522 | } while (level < port->disc.max_level); | |
1523 | ||
1524 | return res; | |
1525 | } | |
1526 | ||
1527 | int sas_discover_root_expander(struct domain_device *dev) | |
1528 | { | |
1529 | int res; | |
1530 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); | |
1531 | ||
bf451207 DW |
1532 | res = sas_rphy_add(dev->rphy); |
1533 | if (res) | |
1534 | goto out_err; | |
2908d778 JB |
1535 | |
1536 | ex->level = dev->port->disc.max_level; /* 0 */ | |
1537 | res = sas_discover_expander(dev); | |
bf451207 DW |
1538 | if (res) |
1539 | goto out_err2; | |
1540 | ||
1541 | sas_ex_bfs_disc(dev->port); | |
2908d778 JB |
1542 | |
1543 | return res; | |
bf451207 DW |
1544 | |
1545 | out_err2: | |
6f63caae | 1546 | sas_rphy_remove(dev->rphy); |
bf451207 | 1547 | out_err: |
bf451207 | 1548 | return res; |
2908d778 JB |
1549 | } |
1550 | ||
1551 | /* ---------- Domain revalidation ---------- */ | |
1552 | ||
1553 | static int sas_get_phy_discover(struct domain_device *dev, | |
1554 | int phy_id, struct smp_resp *disc_resp) | |
1555 | { | |
1556 | int res; | |
1557 | u8 *disc_req; | |
1558 | ||
1559 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); | |
1560 | if (!disc_req) | |
1561 | return -ENOMEM; | |
1562 | ||
1563 | disc_req[1] = SMP_DISCOVER; | |
1564 | disc_req[9] = phy_id; | |
1565 | ||
1566 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, | |
1567 | disc_resp, DISCOVER_RESP_SIZE); | |
1568 | if (res) | |
1569 | goto out; | |
1570 | else if (disc_resp->result != SMP_RESP_FUNC_ACC) { | |
1571 | res = disc_resp->result; | |
1572 | goto out; | |
1573 | } | |
1574 | out: | |
1575 | kfree(disc_req); | |
1576 | return res; | |
1577 | } | |
1578 | ||
1579 | static int sas_get_phy_change_count(struct domain_device *dev, | |
1580 | int phy_id, int *pcc) | |
1581 | { | |
1582 | int res; | |
1583 | struct smp_resp *disc_resp; | |
1584 | ||
1585 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); | |
1586 | if (!disc_resp) | |
1587 | return -ENOMEM; | |
1588 | ||
1589 | res = sas_get_phy_discover(dev, phy_id, disc_resp); | |
1590 | if (!res) | |
1591 | *pcc = disc_resp->disc.change_count; | |
1592 | ||
1593 | kfree(disc_resp); | |
1594 | return res; | |
1595 | } | |
1596 | ||
1597 | static int sas_get_phy_attached_sas_addr(struct domain_device *dev, | |
1598 | int phy_id, u8 *attached_sas_addr) | |
1599 | { | |
1600 | int res; | |
1601 | struct smp_resp *disc_resp; | |
1602 | struct discover_resp *dr; | |
1603 | ||
1604 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); | |
1605 | if (!disc_resp) | |
1606 | return -ENOMEM; | |
1607 | dr = &disc_resp->disc; | |
1608 | ||
1609 | res = sas_get_phy_discover(dev, phy_id, disc_resp); | |
1610 | if (!res) { | |
1611 | memcpy(attached_sas_addr,disc_resp->disc.attached_sas_addr,8); | |
1612 | if (dr->attached_dev_type == 0) | |
1613 | memset(attached_sas_addr, 0, 8); | |
1614 | } | |
1615 | kfree(disc_resp); | |
1616 | return res; | |
1617 | } | |
1618 | ||
1619 | static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id, | |
19252de6 | 1620 | int from_phy, bool update) |
2908d778 JB |
1621 | { |
1622 | struct expander_device *ex = &dev->ex_dev; | |
1623 | int res = 0; | |
1624 | int i; | |
1625 | ||
1626 | for (i = from_phy; i < ex->num_phys; i++) { | |
1627 | int phy_change_count = 0; | |
1628 | ||
1629 | res = sas_get_phy_change_count(dev, i, &phy_change_count); | |
1630 | if (res) | |
1631 | goto out; | |
1632 | else if (phy_change_count != ex->ex_phy[i].phy_change_count) { | |
19252de6 TP |
1633 | if (update) |
1634 | ex->ex_phy[i].phy_change_count = | |
1635 | phy_change_count; | |
2908d778 JB |
1636 | *phy_id = i; |
1637 | return 0; | |
1638 | } | |
1639 | } | |
1640 | out: | |
1641 | return res; | |
1642 | } | |
1643 | ||
1644 | static int sas_get_ex_change_count(struct domain_device *dev, int *ecc) | |
1645 | { | |
1646 | int res; | |
1647 | u8 *rg_req; | |
1648 | struct smp_resp *rg_resp; | |
1649 | ||
1650 | rg_req = alloc_smp_req(RG_REQ_SIZE); | |
1651 | if (!rg_req) | |
1652 | return -ENOMEM; | |
1653 | ||
1654 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); | |
1655 | if (!rg_resp) { | |
1656 | kfree(rg_req); | |
1657 | return -ENOMEM; | |
1658 | } | |
1659 | ||
1660 | rg_req[1] = SMP_REPORT_GENERAL; | |
1661 | ||
1662 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, | |
1663 | RG_RESP_SIZE); | |
1664 | if (res) | |
1665 | goto out; | |
1666 | if (rg_resp->result != SMP_RESP_FUNC_ACC) { | |
1667 | res = rg_resp->result; | |
1668 | goto out; | |
1669 | } | |
1670 | ||
1671 | *ecc = be16_to_cpu(rg_resp->rg.change_count); | |
1672 | out: | |
1673 | kfree(rg_resp); | |
1674 | kfree(rg_req); | |
1675 | return res; | |
1676 | } | |
19252de6 TP |
1677 | /** |
1678 | * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE). | |
1679 | * @dev:domain device to be detect. | |
1680 | * @src_dev: the device which originated BROADCAST(CHANGE). | |
1681 | * | |
1682 | * Add self-configuration expander suport. Suppose two expander cascading, | |
1683 | * when the first level expander is self-configuring, hotplug the disks in | |
1684 | * second level expander, BROADCAST(CHANGE) will not only be originated | |
1685 | * in the second level expander, but also be originated in the first level | |
1686 | * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say, | |
1687 | * expander changed count in two level expanders will all increment at least | |
1688 | * once, but the phy which chang count has changed is the source device which | |
1689 | * we concerned. | |
1690 | */ | |
2908d778 JB |
1691 | |
1692 | static int sas_find_bcast_dev(struct domain_device *dev, | |
1693 | struct domain_device **src_dev) | |
1694 | { | |
1695 | struct expander_device *ex = &dev->ex_dev; | |
1696 | int ex_change_count = -1; | |
19252de6 | 1697 | int phy_id = -1; |
2908d778 | 1698 | int res; |
19252de6 | 1699 | struct domain_device *ch; |
2908d778 JB |
1700 | |
1701 | res = sas_get_ex_change_count(dev, &ex_change_count); | |
1702 | if (res) | |
1703 | goto out; | |
19252de6 TP |
1704 | if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) { |
1705 | /* Just detect if this expander phys phy change count changed, | |
1706 | * in order to determine if this expander originate BROADCAST, | |
1707 | * and do not update phy change count field in our structure. | |
1708 | */ | |
1709 | res = sas_find_bcast_phy(dev, &phy_id, 0, false); | |
1710 | if (phy_id != -1) { | |
1711 | *src_dev = dev; | |
1712 | ex->ex_change_count = ex_change_count; | |
1713 | SAS_DPRINTK("Expander phy change count has changed\n"); | |
1714 | return res; | |
1715 | } else | |
1716 | SAS_DPRINTK("Expander phys DID NOT change\n"); | |
1717 | } | |
1718 | list_for_each_entry(ch, &ex->children, siblings) { | |
1719 | if (ch->dev_type == EDGE_DEV || ch->dev_type == FANOUT_DEV) { | |
1720 | res = sas_find_bcast_dev(ch, src_dev); | |
1721 | if (src_dev) | |
1722 | return res; | |
2908d778 JB |
1723 | } |
1724 | } | |
1725 | out: | |
1726 | return res; | |
1727 | } | |
1728 | ||
1729 | static void sas_unregister_ex_tree(struct domain_device *dev) | |
1730 | { | |
1731 | struct expander_device *ex = &dev->ex_dev; | |
1732 | struct domain_device *child, *n; | |
1733 | ||
1734 | list_for_each_entry_safe(child, n, &ex->children, siblings) { | |
56dd2c06 | 1735 | child->gone = 1; |
2908d778 JB |
1736 | if (child->dev_type == EDGE_DEV || |
1737 | child->dev_type == FANOUT_DEV) | |
1738 | sas_unregister_ex_tree(child); | |
1739 | else | |
1740 | sas_unregister_dev(child); | |
1741 | } | |
1742 | sas_unregister_dev(dev); | |
1743 | } | |
1744 | ||
1745 | static void sas_unregister_devs_sas_addr(struct domain_device *parent, | |
19252de6 | 1746 | int phy_id, bool last) |
2908d778 JB |
1747 | { |
1748 | struct expander_device *ex_dev = &parent->ex_dev; | |
1749 | struct ex_phy *phy = &ex_dev->ex_phy[phy_id]; | |
1750 | struct domain_device *child, *n; | |
19252de6 TP |
1751 | if (last) { |
1752 | list_for_each_entry_safe(child, n, | |
1753 | &ex_dev->children, siblings) { | |
1754 | if (SAS_ADDR(child->sas_addr) == | |
1755 | SAS_ADDR(phy->attached_sas_addr)) { | |
56dd2c06 | 1756 | child->gone = 1; |
19252de6 TP |
1757 | if (child->dev_type == EDGE_DEV || |
1758 | child->dev_type == FANOUT_DEV) | |
1759 | sas_unregister_ex_tree(child); | |
1760 | else | |
1761 | sas_unregister_dev(child); | |
1762 | break; | |
1763 | } | |
2908d778 | 1764 | } |
56dd2c06 | 1765 | parent->gone = 1; |
19252de6 | 1766 | sas_disable_routing(parent, phy->attached_sas_addr); |
2908d778 | 1767 | } |
2908d778 JB |
1768 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |
1769 | sas_port_delete_phy(phy->port, phy->phy); | |
1770 | if (phy->port->num_phys == 0) | |
1771 | sas_port_delete(phy->port); | |
1772 | phy->port = NULL; | |
1773 | } | |
1774 | ||
1775 | static int sas_discover_bfs_by_root_level(struct domain_device *root, | |
1776 | const int level) | |
1777 | { | |
1778 | struct expander_device *ex_root = &root->ex_dev; | |
1779 | struct domain_device *child; | |
1780 | int res = 0; | |
1781 | ||
1782 | list_for_each_entry(child, &ex_root->children, siblings) { | |
1783 | if (child->dev_type == EDGE_DEV || | |
1784 | child->dev_type == FANOUT_DEV) { | |
1785 | struct sas_expander_device *ex = | |
1786 | rphy_to_expander_device(child->rphy); | |
1787 | ||
1788 | if (level > ex->level) | |
1789 | res = sas_discover_bfs_by_root_level(child, | |
1790 | level); | |
1791 | else if (level == ex->level) | |
1792 | res = sas_ex_discover_devices(child, -1); | |
1793 | } | |
1794 | } | |
1795 | return res; | |
1796 | } | |
1797 | ||
1798 | static int sas_discover_bfs_by_root(struct domain_device *dev) | |
1799 | { | |
1800 | int res; | |
1801 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); | |
1802 | int level = ex->level+1; | |
1803 | ||
1804 | res = sas_ex_discover_devices(dev, -1); | |
1805 | if (res) | |
1806 | goto out; | |
1807 | do { | |
1808 | res = sas_discover_bfs_by_root_level(dev, level); | |
1809 | mb(); | |
1810 | level += 1; | |
1811 | } while (level <= dev->port->disc.max_level); | |
1812 | out: | |
1813 | return res; | |
1814 | } | |
1815 | ||
1816 | static int sas_discover_new(struct domain_device *dev, int phy_id) | |
1817 | { | |
1818 | struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id]; | |
1819 | struct domain_device *child; | |
19252de6 TP |
1820 | bool found = false; |
1821 | int res, i; | |
2908d778 JB |
1822 | |
1823 | SAS_DPRINTK("ex %016llx phy%d new device attached\n", | |
1824 | SAS_ADDR(dev->sas_addr), phy_id); | |
1825 | res = sas_ex_phy_discover(dev, phy_id); | |
1826 | if (res) | |
1827 | goto out; | |
19252de6 TP |
1828 | /* to support the wide port inserted */ |
1829 | for (i = 0; i < dev->ex_dev.num_phys; i++) { | |
1830 | struct ex_phy *ex_phy_temp = &dev->ex_dev.ex_phy[i]; | |
1831 | if (i == phy_id) | |
1832 | continue; | |
1833 | if (SAS_ADDR(ex_phy_temp->attached_sas_addr) == | |
1834 | SAS_ADDR(ex_phy->attached_sas_addr)) { | |
1835 | found = true; | |
1836 | break; | |
1837 | } | |
1838 | } | |
1839 | if (found) { | |
1840 | sas_ex_join_wide_port(dev, phy_id); | |
1841 | return 0; | |
1842 | } | |
2908d778 | 1843 | res = sas_ex_discover_devices(dev, phy_id); |
19252de6 | 1844 | if (!res) |
2908d778 JB |
1845 | goto out; |
1846 | list_for_each_entry(child, &dev->ex_dev.children, siblings) { | |
1847 | if (SAS_ADDR(child->sas_addr) == | |
1848 | SAS_ADDR(ex_phy->attached_sas_addr)) { | |
1849 | if (child->dev_type == EDGE_DEV || | |
1850 | child->dev_type == FANOUT_DEV) | |
1851 | res = sas_discover_bfs_by_root(child); | |
1852 | break; | |
1853 | } | |
1854 | } | |
1855 | out: | |
1856 | return res; | |
1857 | } | |
1858 | ||
19252de6 | 1859 | static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last) |
2908d778 JB |
1860 | { |
1861 | struct expander_device *ex = &dev->ex_dev; | |
1862 | struct ex_phy *phy = &ex->ex_phy[phy_id]; | |
1863 | u8 attached_sas_addr[8]; | |
1864 | int res; | |
1865 | ||
1866 | res = sas_get_phy_attached_sas_addr(dev, phy_id, attached_sas_addr); | |
1867 | switch (res) { | |
1868 | case SMP_RESP_NO_PHY: | |
1869 | phy->phy_state = PHY_NOT_PRESENT; | |
19252de6 | 1870 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
2908d778 JB |
1871 | goto out; break; |
1872 | case SMP_RESP_PHY_VACANT: | |
1873 | phy->phy_state = PHY_VACANT; | |
19252de6 | 1874 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
2908d778 JB |
1875 | goto out; break; |
1876 | case SMP_RESP_FUNC_ACC: | |
1877 | break; | |
1878 | } | |
1879 | ||
1880 | if (SAS_ADDR(attached_sas_addr) == 0) { | |
1881 | phy->phy_state = PHY_EMPTY; | |
19252de6 | 1882 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
2908d778 JB |
1883 | } else if (SAS_ADDR(attached_sas_addr) == |
1884 | SAS_ADDR(phy->attached_sas_addr)) { | |
1885 | SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n", | |
1886 | SAS_ADDR(dev->sas_addr), phy_id); | |
a01e70e5 | 1887 | sas_ex_phy_discover(dev, phy_id); |
2908d778 JB |
1888 | } else |
1889 | res = sas_discover_new(dev, phy_id); | |
1890 | out: | |
1891 | return res; | |
1892 | } | |
1893 | ||
19252de6 TP |
1894 | /** |
1895 | * sas_rediscover - revalidate the domain. | |
1896 | * @dev:domain device to be detect. | |
1897 | * @phy_id: the phy id will be detected. | |
1898 | * | |
1899 | * NOTE: this process _must_ quit (return) as soon as any connection | |
1900 | * errors are encountered. Connection recovery is done elsewhere. | |
1901 | * Discover process only interrogates devices in order to discover the | |
1902 | * domain.For plugging out, we un-register the device only when it is | |
1903 | * the last phy in the port, for other phys in this port, we just delete it | |
1904 | * from the port.For inserting, we do discovery when it is the | |
1905 | * first phy,for other phys in this port, we add it to the port to | |
1906 | * forming the wide-port. | |
1907 | */ | |
2908d778 JB |
1908 | static int sas_rediscover(struct domain_device *dev, const int phy_id) |
1909 | { | |
1910 | struct expander_device *ex = &dev->ex_dev; | |
1911 | struct ex_phy *changed_phy = &ex->ex_phy[phy_id]; | |
1912 | int res = 0; | |
1913 | int i; | |
19252de6 | 1914 | bool last = true; /* is this the last phy of the port */ |
2908d778 JB |
1915 | |
1916 | SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n", | |
1917 | SAS_ADDR(dev->sas_addr), phy_id); | |
1918 | ||
1919 | if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) { | |
1920 | for (i = 0; i < ex->num_phys; i++) { | |
1921 | struct ex_phy *phy = &ex->ex_phy[i]; | |
1922 | ||
1923 | if (i == phy_id) | |
1924 | continue; | |
1925 | if (SAS_ADDR(phy->attached_sas_addr) == | |
1926 | SAS_ADDR(changed_phy->attached_sas_addr)) { | |
1927 | SAS_DPRINTK("phy%d part of wide port with " | |
1928 | "phy%d\n", phy_id, i); | |
19252de6 TP |
1929 | last = false; |
1930 | break; | |
2908d778 JB |
1931 | } |
1932 | } | |
19252de6 | 1933 | res = sas_rediscover_dev(dev, phy_id, last); |
2908d778 JB |
1934 | } else |
1935 | res = sas_discover_new(dev, phy_id); | |
2908d778 JB |
1936 | return res; |
1937 | } | |
1938 | ||
1939 | /** | |
1940 | * sas_revalidate_domain -- revalidate the domain | |
1941 | * @port: port to the domain of interest | |
1942 | * | |
1943 | * NOTE: this process _must_ quit (return) as soon as any connection | |
1944 | * errors are encountered. Connection recovery is done elsewhere. | |
1945 | * Discover process only interrogates devices in order to discover the | |
1946 | * domain. | |
1947 | */ | |
1948 | int sas_ex_revalidate_domain(struct domain_device *port_dev) | |
1949 | { | |
1950 | int res; | |
1951 | struct domain_device *dev = NULL; | |
1952 | ||
1953 | res = sas_find_bcast_dev(port_dev, &dev); | |
1954 | if (res) | |
1955 | goto out; | |
1956 | if (dev) { | |
1957 | struct expander_device *ex = &dev->ex_dev; | |
1958 | int i = 0, phy_id; | |
1959 | ||
1960 | do { | |
1961 | phy_id = -1; | |
19252de6 | 1962 | res = sas_find_bcast_phy(dev, &phy_id, i, true); |
2908d778 JB |
1963 | if (phy_id == -1) |
1964 | break; | |
1965 | res = sas_rediscover(dev, phy_id); | |
1966 | i = phy_id + 1; | |
1967 | } while (i < ex->num_phys); | |
1968 | } | |
1969 | out: | |
1970 | return res; | |
1971 | } | |
1972 | ||
ba1fc175 FT |
1973 | int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, |
1974 | struct request *req) | |
1975 | { | |
1976 | struct domain_device *dev; | |
2cd614c8 | 1977 | int ret, type; |
ba1fc175 FT |
1978 | struct request *rsp = req->next_rq; |
1979 | ||
1980 | if (!rsp) { | |
1981 | printk("%s: space for a smp response is missing\n", | |
cadbd4a5 | 1982 | __func__); |
ba1fc175 FT |
1983 | return -EINVAL; |
1984 | } | |
1985 | ||
2cd614c8 | 1986 | /* no rphy means no smp target support (ie aic94xx host) */ |
b98e66fa JB |
1987 | if (!rphy) |
1988 | return sas_smp_host_handler(shost, req, rsp); | |
1989 | ||
2cd614c8 | 1990 | type = rphy->identify.device_type; |
ba1fc175 FT |
1991 | |
1992 | if (type != SAS_EDGE_EXPANDER_DEVICE && | |
1993 | type != SAS_FANOUT_EXPANDER_DEVICE) { | |
1994 | printk("%s: can we send a smp request to a device?\n", | |
cadbd4a5 | 1995 | __func__); |
ba1fc175 FT |
1996 | return -EINVAL; |
1997 | } | |
1998 | ||
1999 | dev = sas_find_dev_by_rphy(rphy); | |
2000 | if (!dev) { | |
cadbd4a5 | 2001 | printk("%s: fail to find a domain_device?\n", __func__); |
ba1fc175 FT |
2002 | return -EINVAL; |
2003 | } | |
2004 | ||
2005 | /* do we need to support multiple segments? */ | |
2006 | if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) { | |
2007 | printk("%s: multiple segments req %u %u, rsp %u %u\n", | |
b0790410 TH |
2008 | __func__, req->bio->bi_vcnt, blk_rq_bytes(req), |
2009 | rsp->bio->bi_vcnt, blk_rq_bytes(rsp)); | |
ba1fc175 FT |
2010 | return -EINVAL; |
2011 | } | |
2012 | ||
b0790410 TH |
2013 | ret = smp_execute_task(dev, bio_data(req->bio), blk_rq_bytes(req), |
2014 | bio_data(rsp->bio), blk_rq_bytes(rsp)); | |
2d4b63e1 JB |
2015 | if (ret > 0) { |
2016 | /* positive number is the untransferred residual */ | |
c3a4d78c | 2017 | rsp->resid_len = ret; |
5f49f631 | 2018 | req->resid_len = 0; |
2d4b63e1 | 2019 | ret = 0; |
5f49f631 TH |
2020 | } else if (ret == 0) { |
2021 | rsp->resid_len = 0; | |
2022 | req->resid_len = 0; | |
2d4b63e1 | 2023 | } |
ba1fc175 FT |
2024 | |
2025 | return ret; | |
2026 | } |