Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ACPI PCI HotPlug glue functions to ACPI CA subsystem | |
3 | * | |
4 | * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com) | |
5 | * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com) | |
6 | * Copyright (C) 2002,2003 NEC Corporation | |
42f49a6a RS |
7 | * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com) |
8 | * Copyright (C) 2003-2005 Hewlett Packard | |
8e7561cf RS |
9 | * Copyright (C) 2005 Rajesh Shah (rajesh.shah@intel.com) |
10 | * Copyright (C) 2005 Intel Corporation | |
1da177e4 LT |
11 | * |
12 | * All rights reserved. | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or (at | |
17 | * your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, but | |
20 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
22 | * NON INFRINGEMENT. See the GNU General Public License for more | |
23 | * details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
28 | * | |
29 | * Send feedback to <t-kochi@bq.jp.nec.com> | |
30 | * | |
31 | */ | |
32 | ||
42f49a6a RS |
33 | /* |
34 | * Lifetime rules for pci_dev: | |
35 | * - The one in acpiphp_func has its refcount elevated by pci_get_slot() | |
36 | * when the driver is loaded or when an insertion event occurs. It loses | |
37 | * a refcount when its ejected or the driver unloads. | |
38 | * - The one in acpiphp_bridge has its refcount elevated by pci_get_slot() | |
39 | * when the bridge is scanned and it loses a refcount when the bridge | |
40 | * is removed. | |
41 | */ | |
42 | ||
1da177e4 LT |
43 | #include <linux/init.h> |
44 | #include <linux/module.h> | |
45 | ||
46 | #include <linux/kernel.h> | |
47 | #include <linux/pci.h> | |
48 | #include <linux/smp_lock.h> | |
49 | #include <asm/semaphore.h> | |
50 | ||
51 | #include "../pci.h" | |
52 | #include "pci_hotplug.h" | |
53 | #include "acpiphp.h" | |
54 | ||
55 | static LIST_HEAD(bridge_list); | |
56 | ||
57 | #define MY_NAME "acpiphp_glue" | |
58 | ||
59 | static void handle_hotplug_event_bridge (acpi_handle, u32, void *); | |
60 | static void handle_hotplug_event_func (acpi_handle, u32, void *); | |
8e5dce35 KA |
61 | static void acpiphp_sanitize_bus(struct pci_bus *bus); |
62 | static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus); | |
63 | ||
1da177e4 LT |
64 | |
65 | /* | |
66 | * initialization & terminatation routines | |
67 | */ | |
68 | ||
69 | /** | |
70 | * is_ejectable - determine if a slot is ejectable | |
71 | * @handle: handle to acpi namespace | |
72 | * | |
73 | * Ejectable slot should satisfy at least these conditions: | |
74 | * | |
75 | * 1. has _ADR method | |
76 | * 2. has _EJ0 method | |
77 | * | |
78 | * optionally | |
79 | * | |
80 | * 1. has _STA method | |
81 | * 2. has _PS0 method | |
82 | * 3. has _PS3 method | |
83 | * 4. .. | |
84 | * | |
85 | */ | |
86 | static int is_ejectable(acpi_handle handle) | |
87 | { | |
88 | acpi_status status; | |
89 | acpi_handle tmp; | |
90 | ||
91 | status = acpi_get_handle(handle, "_ADR", &tmp); | |
92 | if (ACPI_FAILURE(status)) { | |
93 | return 0; | |
94 | } | |
95 | ||
96 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
97 | if (ACPI_FAILURE(status)) { | |
98 | return 0; | |
99 | } | |
100 | ||
101 | return 1; | |
102 | } | |
103 | ||
104 | ||
105 | /* callback routine to check the existence of ejectable slots */ | |
106 | static acpi_status | |
107 | is_ejectable_slot(acpi_handle handle, u32 lvl, void *context, void **rv) | |
108 | { | |
109 | int *count = (int *)context; | |
110 | ||
111 | if (is_ejectable(handle)) { | |
112 | (*count)++; | |
113 | /* only one ejectable slot is enough */ | |
114 | return AE_CTRL_TERMINATE; | |
115 | } else { | |
116 | return AE_OK; | |
117 | } | |
118 | } | |
119 | ||
120 | ||
121 | /* callback routine to register each ACPI PCI slot object */ | |
122 | static acpi_status | |
123 | register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) | |
124 | { | |
125 | struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context; | |
126 | struct acpiphp_slot *slot; | |
127 | struct acpiphp_func *newfunc; | |
128 | acpi_handle tmp; | |
129 | acpi_status status = AE_OK; | |
130 | unsigned long adr, sun; | |
131 | int device, function; | |
132 | static int num_slots = 0; /* XXX if we support I/O node hotplug... */ | |
133 | ||
134 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr); | |
135 | ||
136 | if (ACPI_FAILURE(status)) | |
137 | return AE_OK; | |
138 | ||
139 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
140 | ||
141 | if (ACPI_FAILURE(status)) | |
142 | return AE_OK; | |
143 | ||
144 | device = (adr >> 16) & 0xffff; | |
145 | function = adr & 0xffff; | |
146 | ||
147 | newfunc = kmalloc(sizeof(struct acpiphp_func), GFP_KERNEL); | |
148 | if (!newfunc) | |
149 | return AE_NO_MEMORY; | |
150 | memset(newfunc, 0, sizeof(struct acpiphp_func)); | |
151 | ||
152 | INIT_LIST_HEAD(&newfunc->sibling); | |
153 | newfunc->handle = handle; | |
154 | newfunc->function = function; | |
155 | newfunc->flags = FUNC_HAS_EJ0; | |
156 | ||
157 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp))) | |
158 | newfunc->flags |= FUNC_HAS_STA; | |
159 | ||
160 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp))) | |
161 | newfunc->flags |= FUNC_HAS_PS0; | |
162 | ||
163 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) | |
164 | newfunc->flags |= FUNC_HAS_PS3; | |
165 | ||
166 | status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); | |
167 | if (ACPI_FAILURE(status)) | |
168 | sun = -1; | |
169 | ||
170 | /* search for objects that share the same slot */ | |
171 | for (slot = bridge->slots; slot; slot = slot->next) | |
172 | if (slot->device == device) { | |
173 | if (slot->sun != sun) | |
174 | warn("sibling found, but _SUN doesn't match!\n"); | |
175 | break; | |
176 | } | |
177 | ||
178 | if (!slot) { | |
179 | slot = kmalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); | |
180 | if (!slot) { | |
181 | kfree(newfunc); | |
182 | return AE_NO_MEMORY; | |
183 | } | |
184 | ||
185 | memset(slot, 0, sizeof(struct acpiphp_slot)); | |
186 | slot->bridge = bridge; | |
187 | slot->id = num_slots++; | |
188 | slot->device = device; | |
189 | slot->sun = sun; | |
190 | INIT_LIST_HEAD(&slot->funcs); | |
191 | init_MUTEX(&slot->crit_sect); | |
192 | ||
193 | slot->next = bridge->slots; | |
194 | bridge->slots = slot; | |
195 | ||
196 | bridge->nr_slots++; | |
197 | ||
42f49a6a RS |
198 | dbg("found ACPI PCI Hotplug slot %d at PCI %04x:%02x:%02x\n", |
199 | slot->sun, pci_domain_nr(bridge->pci_bus), | |
200 | bridge->pci_bus->number, slot->device); | |
1da177e4 LT |
201 | } |
202 | ||
203 | newfunc->slot = slot; | |
204 | list_add_tail(&newfunc->sibling, &slot->funcs); | |
205 | ||
206 | /* associate corresponding pci_dev */ | |
42f49a6a | 207 | newfunc->pci_dev = pci_get_slot(bridge->pci_bus, |
1da177e4 LT |
208 | PCI_DEVFN(device, function)); |
209 | if (newfunc->pci_dev) { | |
1da177e4 LT |
210 | slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); |
211 | } | |
212 | ||
213 | /* install notify handler */ | |
214 | status = acpi_install_notify_handler(handle, | |
215 | ACPI_SYSTEM_NOTIFY, | |
216 | handle_hotplug_event_func, | |
217 | newfunc); | |
218 | ||
219 | if (ACPI_FAILURE(status)) { | |
220 | err("failed to register interrupt notify handler\n"); | |
221 | return status; | |
222 | } | |
223 | ||
224 | return AE_OK; | |
225 | } | |
226 | ||
227 | ||
228 | /* see if it's worth looking at this bridge */ | |
229 | static int detect_ejectable_slots(acpi_handle *bridge_handle) | |
230 | { | |
231 | acpi_status status; | |
232 | int count; | |
233 | ||
234 | count = 0; | |
235 | ||
236 | /* only check slots defined directly below bridge object */ | |
237 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1, | |
238 | is_ejectable_slot, (void *)&count, NULL); | |
239 | ||
240 | return count; | |
241 | } | |
242 | ||
243 | ||
1da177e4 LT |
244 | /* decode ACPI 2.0 _HPP hot plug parameters */ |
245 | static void decode_hpp(struct acpiphp_bridge *bridge) | |
246 | { | |
247 | acpi_status status; | |
248 | struct acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER, | |
249 | .pointer = NULL}; | |
250 | union acpi_object *package; | |
251 | int i; | |
252 | ||
253 | /* default numbers */ | |
254 | bridge->hpp.cache_line_size = 0x10; | |
255 | bridge->hpp.latency_timer = 0x40; | |
256 | bridge->hpp.enable_SERR = 0; | |
257 | bridge->hpp.enable_PERR = 0; | |
258 | ||
259 | status = acpi_evaluate_object(bridge->handle, "_HPP", NULL, &buffer); | |
260 | ||
261 | if (ACPI_FAILURE(status)) { | |
262 | dbg("_HPP evaluation failed\n"); | |
263 | return; | |
264 | } | |
265 | ||
266 | package = (union acpi_object *) buffer.pointer; | |
267 | ||
268 | if (!package || package->type != ACPI_TYPE_PACKAGE || | |
269 | package->package.count != 4 || !package->package.elements) { | |
270 | err("invalid _HPP object; ignoring\n"); | |
271 | goto err_exit; | |
272 | } | |
273 | ||
274 | for (i = 0; i < 4; i++) { | |
275 | if (package->package.elements[i].type != ACPI_TYPE_INTEGER) { | |
276 | err("invalid _HPP parameter type; ignoring\n"); | |
277 | goto err_exit; | |
278 | } | |
279 | } | |
280 | ||
281 | bridge->hpp.cache_line_size = package->package.elements[0].integer.value; | |
282 | bridge->hpp.latency_timer = package->package.elements[1].integer.value; | |
283 | bridge->hpp.enable_SERR = package->package.elements[2].integer.value; | |
284 | bridge->hpp.enable_PERR = package->package.elements[3].integer.value; | |
285 | ||
286 | dbg("_HPP parameter = (%02x, %02x, %02x, %02x)\n", | |
287 | bridge->hpp.cache_line_size, | |
288 | bridge->hpp.latency_timer, | |
289 | bridge->hpp.enable_SERR, | |
290 | bridge->hpp.enable_PERR); | |
291 | ||
292 | bridge->flags |= BRIDGE_HAS_HPP; | |
293 | ||
294 | err_exit: | |
295 | kfree(buffer.pointer); | |
296 | } | |
297 | ||
298 | ||
299 | /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */ | |
300 | static void init_bridge_misc(struct acpiphp_bridge *bridge) | |
301 | { | |
302 | acpi_status status; | |
303 | ||
304 | /* decode ACPI 2.0 _HPP (hot plug parameters) */ | |
305 | decode_hpp(bridge); | |
306 | ||
1da177e4 LT |
307 | /* register all slot objects under this bridge */ |
308 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1, | |
309 | register_slot, bridge, NULL); | |
310 | ||
311 | /* install notify handler */ | |
8e7561cf RS |
312 | if (bridge->type != BRIDGE_TYPE_HOST) { |
313 | status = acpi_install_notify_handler(bridge->handle, | |
1da177e4 LT |
314 | ACPI_SYSTEM_NOTIFY, |
315 | handle_hotplug_event_bridge, | |
316 | bridge); | |
317 | ||
8e7561cf RS |
318 | if (ACPI_FAILURE(status)) { |
319 | err("failed to register interrupt notify handler\n"); | |
320 | } | |
1da177e4 LT |
321 | } |
322 | ||
323 | list_add(&bridge->list, &bridge_list); | |
1da177e4 LT |
324 | } |
325 | ||
326 | ||
327 | /* allocate and initialize host bridge data structure */ | |
42f49a6a | 328 | static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus) |
1da177e4 | 329 | { |
1da177e4 LT |
330 | struct acpiphp_bridge *bridge; |
331 | ||
332 | bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); | |
333 | if (bridge == NULL) | |
334 | return; | |
335 | ||
336 | memset(bridge, 0, sizeof(struct acpiphp_bridge)); | |
337 | ||
338 | bridge->type = BRIDGE_TYPE_HOST; | |
339 | bridge->handle = handle; | |
1da177e4 | 340 | |
42f49a6a | 341 | bridge->pci_bus = pci_bus; |
1da177e4 LT |
342 | |
343 | spin_lock_init(&bridge->res_lock); | |
344 | ||
1da177e4 LT |
345 | init_bridge_misc(bridge); |
346 | } | |
347 | ||
348 | ||
349 | /* allocate and initialize PCI-to-PCI bridge data structure */ | |
42f49a6a | 350 | static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev) |
1da177e4 LT |
351 | { |
352 | struct acpiphp_bridge *bridge; | |
1da177e4 LT |
353 | |
354 | bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); | |
355 | if (bridge == NULL) { | |
356 | err("out of memory\n"); | |
357 | return; | |
358 | } | |
359 | ||
360 | memset(bridge, 0, sizeof(struct acpiphp_bridge)); | |
361 | ||
362 | bridge->type = BRIDGE_TYPE_P2P; | |
363 | bridge->handle = handle; | |
1da177e4 | 364 | |
42f49a6a RS |
365 | bridge->pci_dev = pci_dev_get(pci_dev); |
366 | bridge->pci_bus = pci_dev->subordinate; | |
1da177e4 LT |
367 | if (!bridge->pci_bus) { |
368 | err("This is not a PCI-to-PCI bridge!\n"); | |
42f49a6a | 369 | goto err; |
1da177e4 LT |
370 | } |
371 | ||
372 | spin_lock_init(&bridge->res_lock); | |
373 | ||
1da177e4 | 374 | init_bridge_misc(bridge); |
42f49a6a RS |
375 | return; |
376 | err: | |
377 | pci_dev_put(pci_dev); | |
378 | kfree(bridge); | |
379 | return; | |
1da177e4 LT |
380 | } |
381 | ||
382 | ||
383 | /* callback routine to find P2P bridges */ | |
384 | static acpi_status | |
385 | find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
386 | { | |
387 | acpi_status status; | |
388 | acpi_handle dummy_handle; | |
1da177e4 | 389 | unsigned long tmp; |
42f49a6a | 390 | int device, function; |
1da177e4 | 391 | struct pci_dev *dev; |
42f49a6a | 392 | struct pci_bus *pci_bus = context; |
1da177e4 LT |
393 | |
394 | status = acpi_get_handle(handle, "_ADR", &dummy_handle); | |
395 | if (ACPI_FAILURE(status)) | |
396 | return AE_OK; /* continue */ | |
397 | ||
398 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp); | |
399 | if (ACPI_FAILURE(status)) { | |
400 | dbg("%s: _ADR evaluation failure\n", __FUNCTION__); | |
401 | return AE_OK; | |
402 | } | |
403 | ||
404 | device = (tmp >> 16) & 0xffff; | |
405 | function = tmp & 0xffff; | |
406 | ||
42f49a6a | 407 | dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function)); |
1da177e4 | 408 | |
42f49a6a RS |
409 | if (!dev || !dev->subordinate) |
410 | goto out; | |
1da177e4 LT |
411 | |
412 | /* check if this bridge has ejectable slots */ | |
413 | if (detect_ejectable_slots(handle) > 0) { | |
414 | dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); | |
42f49a6a | 415 | add_p2p_bridge(handle, dev); |
1da177e4 LT |
416 | } |
417 | ||
42f49a6a RS |
418 | out: |
419 | pci_dev_put(dev); | |
1da177e4 LT |
420 | return AE_OK; |
421 | } | |
422 | ||
423 | ||
424 | /* find hot-pluggable slots, and then find P2P bridge */ | |
425 | static int add_bridge(acpi_handle handle) | |
426 | { | |
427 | acpi_status status; | |
428 | unsigned long tmp; | |
429 | int seg, bus; | |
430 | acpi_handle dummy_handle; | |
42f49a6a | 431 | struct pci_bus *pci_bus; |
1da177e4 LT |
432 | |
433 | /* if the bridge doesn't have _STA, we assume it is always there */ | |
434 | status = acpi_get_handle(handle, "_STA", &dummy_handle); | |
435 | if (ACPI_SUCCESS(status)) { | |
436 | status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp); | |
437 | if (ACPI_FAILURE(status)) { | |
438 | dbg("%s: _STA evaluation failure\n", __FUNCTION__); | |
439 | return 0; | |
440 | } | |
441 | if ((tmp & ACPI_STA_FUNCTIONING) == 0) | |
442 | /* don't register this object */ | |
443 | return 0; | |
444 | } | |
445 | ||
446 | /* get PCI segment number */ | |
447 | status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp); | |
448 | ||
449 | seg = ACPI_SUCCESS(status) ? tmp : 0; | |
450 | ||
451 | /* get PCI bus number */ | |
452 | status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp); | |
453 | ||
454 | if (ACPI_SUCCESS(status)) { | |
455 | bus = tmp; | |
456 | } else { | |
457 | warn("can't get bus number, assuming 0\n"); | |
458 | bus = 0; | |
459 | } | |
460 | ||
42f49a6a RS |
461 | pci_bus = pci_find_bus(seg, bus); |
462 | if (!pci_bus) { | |
463 | err("Can't find bus %04x:%02x\n", seg, bus); | |
464 | return 0; | |
465 | } | |
466 | ||
1da177e4 LT |
467 | /* check if this bridge has ejectable slots */ |
468 | if (detect_ejectable_slots(handle) > 0) { | |
469 | dbg("found PCI host-bus bridge with hot-pluggable slots\n"); | |
42f49a6a | 470 | add_host_bridge(handle, pci_bus); |
1da177e4 LT |
471 | return 0; |
472 | } | |
473 | ||
1da177e4 LT |
474 | /* search P2P bridges under this host bridge */ |
475 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
42f49a6a | 476 | find_p2p_bridge, pci_bus, NULL); |
1da177e4 LT |
477 | |
478 | if (ACPI_FAILURE(status)) | |
479 | warn("find_p2p_bridge faied (error code = 0x%x)\n",status); | |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
42f49a6a RS |
484 | static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle) |
485 | { | |
486 | struct list_head *head; | |
487 | list_for_each(head, &bridge_list) { | |
488 | struct acpiphp_bridge *bridge = list_entry(head, | |
489 | struct acpiphp_bridge, list); | |
490 | if (bridge->handle == handle) | |
491 | return bridge; | |
492 | } | |
493 | ||
494 | return NULL; | |
495 | } | |
1da177e4 | 496 | |
364d5094 | 497 | static void cleanup_bridge(struct acpiphp_bridge *bridge) |
1da177e4 | 498 | { |
42f49a6a | 499 | struct list_head *list, *tmp; |
42f49a6a RS |
500 | struct acpiphp_slot *slot; |
501 | acpi_status status; | |
364d5094 | 502 | acpi_handle handle = bridge->handle; |
42f49a6a RS |
503 | |
504 | status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
505 | handle_hotplug_event_bridge); | |
506 | if (ACPI_FAILURE(status)) | |
507 | err("failed to remove notify handler\n"); | |
508 | ||
509 | slot = bridge->slots; | |
510 | while (slot) { | |
511 | struct acpiphp_slot *next = slot->next; | |
512 | list_for_each_safe (list, tmp, &slot->funcs) { | |
513 | struct acpiphp_func *func; | |
514 | func = list_entry(list, struct acpiphp_func, sibling); | |
515 | status = acpi_remove_notify_handler(func->handle, | |
516 | ACPI_SYSTEM_NOTIFY, | |
517 | handle_hotplug_event_func); | |
518 | if (ACPI_FAILURE(status)) | |
519 | err("failed to remove notify handler\n"); | |
520 | pci_dev_put(func->pci_dev); | |
521 | list_del(list); | |
522 | kfree(func); | |
523 | } | |
524 | kfree(slot); | |
525 | slot = next; | |
526 | } | |
527 | ||
528 | pci_dev_put(bridge->pci_dev); | |
529 | list_del(&bridge->list); | |
530 | kfree(bridge); | |
1da177e4 LT |
531 | } |
532 | ||
364d5094 RS |
533 | static acpi_status |
534 | cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
535 | { | |
536 | struct acpiphp_bridge *bridge; | |
537 | ||
538 | if (!(bridge = acpiphp_handle_to_bridge(handle))) | |
539 | return AE_OK; | |
540 | cleanup_bridge(bridge); | |
541 | return AE_OK; | |
542 | } | |
543 | ||
544 | static void remove_bridge(acpi_handle handle) | |
545 | { | |
546 | struct acpiphp_bridge *bridge; | |
547 | ||
548 | bridge = acpiphp_handle_to_bridge(handle); | |
549 | if (bridge) { | |
550 | cleanup_bridge(bridge); | |
551 | } else { | |
552 | /* clean-up p2p bridges under this host bridge */ | |
553 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
554 | (u32)1, cleanup_p2p_bridge, NULL, NULL); | |
555 | } | |
556 | } | |
1da177e4 | 557 | |
a0d399a8 KK |
558 | static struct pci_dev * get_apic_pci_info(acpi_handle handle) |
559 | { | |
560 | struct acpi_pci_id id; | |
561 | struct pci_bus *bus; | |
562 | struct pci_dev *dev; | |
563 | ||
564 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &id))) | |
565 | return NULL; | |
566 | ||
567 | bus = pci_find_bus(id.segment, id.bus); | |
568 | if (!bus) | |
569 | return NULL; | |
570 | ||
571 | dev = pci_get_slot(bus, PCI_DEVFN(id.device, id.function)); | |
572 | if (!dev) | |
573 | return NULL; | |
574 | ||
575 | if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) && | |
576 | (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC)) | |
577 | { | |
578 | pci_dev_put(dev); | |
579 | return NULL; | |
580 | } | |
581 | ||
582 | return dev; | |
583 | } | |
584 | ||
585 | static int get_gsi_base(acpi_handle handle, u32 *gsi_base) | |
586 | { | |
587 | acpi_status status; | |
588 | int result = -1; | |
589 | unsigned long gsb; | |
590 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
591 | union acpi_object *obj; | |
592 | void *table; | |
593 | ||
594 | status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb); | |
595 | if (ACPI_SUCCESS(status)) { | |
596 | *gsi_base = (u32)gsb; | |
597 | return 0; | |
598 | } | |
599 | ||
600 | status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer); | |
601 | if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer) | |
602 | return -1; | |
603 | ||
604 | obj = buffer.pointer; | |
605 | if (obj->type != ACPI_TYPE_BUFFER) | |
606 | goto out; | |
607 | ||
608 | table = obj->buffer.pointer; | |
609 | switch (((acpi_table_entry_header *)table)->type) { | |
610 | case ACPI_MADT_IOSAPIC: | |
611 | *gsi_base = ((struct acpi_table_iosapic *)table)->global_irq_base; | |
612 | result = 0; | |
613 | break; | |
614 | case ACPI_MADT_IOAPIC: | |
615 | *gsi_base = ((struct acpi_table_ioapic *)table)->global_irq_base; | |
616 | result = 0; | |
617 | break; | |
618 | default: | |
619 | break; | |
620 | } | |
621 | out: | |
622 | acpi_os_free(buffer.pointer); | |
623 | return result; | |
624 | } | |
625 | ||
626 | static acpi_status | |
627 | ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv) | |
628 | { | |
629 | acpi_status status; | |
630 | unsigned long sta; | |
631 | acpi_handle tmp; | |
632 | struct pci_dev *pdev; | |
633 | u32 gsi_base; | |
634 | u64 phys_addr; | |
635 | ||
636 | /* Evaluate _STA if present */ | |
637 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
638 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
639 | return AE_CTRL_DEPTH; | |
640 | ||
641 | /* Scan only PCI bus scope */ | |
642 | status = acpi_get_handle(handle, "_HID", &tmp); | |
643 | if (ACPI_SUCCESS(status)) | |
644 | return AE_CTRL_DEPTH; | |
645 | ||
646 | if (get_gsi_base(handle, &gsi_base)) | |
647 | return AE_OK; | |
648 | ||
649 | pdev = get_apic_pci_info(handle); | |
650 | if (!pdev) | |
651 | return AE_OK; | |
652 | ||
653 | if (pci_enable_device(pdev)) { | |
654 | pci_dev_put(pdev); | |
655 | return AE_OK; | |
656 | } | |
657 | ||
658 | pci_set_master(pdev); | |
659 | ||
660 | if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)")) { | |
661 | pci_disable_device(pdev); | |
662 | pci_dev_put(pdev); | |
663 | return AE_OK; | |
664 | } | |
665 | ||
666 | phys_addr = pci_resource_start(pdev, 0); | |
667 | if (acpi_register_ioapic(handle, phys_addr, gsi_base)) { | |
668 | pci_release_region(pdev, 0); | |
669 | pci_disable_device(pdev); | |
670 | pci_dev_put(pdev); | |
671 | return AE_OK; | |
672 | } | |
673 | ||
674 | return AE_OK; | |
675 | } | |
676 | ||
677 | static int acpiphp_configure_ioapics(acpi_handle handle) | |
678 | { | |
679 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
680 | ACPI_UINT32_MAX, ioapic_add, NULL, NULL); | |
681 | return 0; | |
682 | } | |
683 | ||
1da177e4 LT |
684 | static int power_on_slot(struct acpiphp_slot *slot) |
685 | { | |
686 | acpi_status status; | |
687 | struct acpiphp_func *func; | |
688 | struct list_head *l; | |
689 | int retval = 0; | |
690 | ||
691 | /* if already enabled, just skip */ | |
692 | if (slot->flags & SLOT_POWEREDON) | |
693 | goto err_exit; | |
694 | ||
695 | list_for_each (l, &slot->funcs) { | |
696 | func = list_entry(l, struct acpiphp_func, sibling); | |
697 | ||
698 | if (func->flags & FUNC_HAS_PS0) { | |
699 | dbg("%s: executing _PS0\n", __FUNCTION__); | |
700 | status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); | |
701 | if (ACPI_FAILURE(status)) { | |
702 | warn("%s: _PS0 failed\n", __FUNCTION__); | |
703 | retval = -1; | |
704 | goto err_exit; | |
705 | } else | |
706 | break; | |
707 | } | |
708 | } | |
709 | ||
710 | /* TBD: evaluate _STA to check if the slot is enabled */ | |
711 | ||
712 | slot->flags |= SLOT_POWEREDON; | |
713 | ||
714 | err_exit: | |
715 | return retval; | |
716 | } | |
717 | ||
718 | ||
719 | static int power_off_slot(struct acpiphp_slot *slot) | |
720 | { | |
721 | acpi_status status; | |
722 | struct acpiphp_func *func; | |
723 | struct list_head *l; | |
1da177e4 LT |
724 | |
725 | int retval = 0; | |
726 | ||
727 | /* if already disabled, just skip */ | |
728 | if ((slot->flags & SLOT_POWEREDON) == 0) | |
729 | goto err_exit; | |
730 | ||
731 | list_for_each (l, &slot->funcs) { | |
732 | func = list_entry(l, struct acpiphp_func, sibling); | |
733 | ||
2f523b15 | 734 | if (func->flags & FUNC_HAS_PS3) { |
1da177e4 LT |
735 | status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); |
736 | if (ACPI_FAILURE(status)) { | |
737 | warn("%s: _PS3 failed\n", __FUNCTION__); | |
738 | retval = -1; | |
739 | goto err_exit; | |
740 | } else | |
741 | break; | |
742 | } | |
743 | } | |
744 | ||
1da177e4 LT |
745 | /* TBD: evaluate _STA to check if the slot is disabled */ |
746 | ||
747 | slot->flags &= (~SLOT_POWEREDON); | |
748 | ||
749 | err_exit: | |
750 | return retval; | |
751 | } | |
752 | ||
753 | ||
754 | /** | |
755 | * enable_device - enable, configure a slot | |
756 | * @slot: slot to be enabled | |
757 | * | |
758 | * This function should be called per *physical slot*, | |
759 | * not per each slot object in ACPI namespace. | |
760 | * | |
761 | */ | |
762 | static int enable_device(struct acpiphp_slot *slot) | |
763 | { | |
1da177e4 | 764 | struct pci_dev *dev; |
42f49a6a | 765 | struct pci_bus *bus = slot->bridge->pci_bus; |
1da177e4 LT |
766 | struct list_head *l; |
767 | struct acpiphp_func *func; | |
768 | int retval = 0; | |
42f49a6a | 769 | int num, max, pass; |
1da177e4 LT |
770 | |
771 | if (slot->flags & SLOT_ENABLED) | |
772 | goto err_exit; | |
773 | ||
774 | /* sanity check: dev should be NULL when hot-plugged in */ | |
42f49a6a | 775 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0)); |
1da177e4 LT |
776 | if (dev) { |
777 | /* This case shouldn't happen */ | |
778 | err("pci_dev structure already exists.\n"); | |
42f49a6a | 779 | pci_dev_put(dev); |
1da177e4 LT |
780 | retval = -1; |
781 | goto err_exit; | |
782 | } | |
783 | ||
42f49a6a RS |
784 | num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0)); |
785 | if (num == 0) { | |
1da177e4 LT |
786 | err("No new device found\n"); |
787 | retval = -1; | |
788 | goto err_exit; | |
789 | } | |
790 | ||
42f49a6a RS |
791 | max = bus->secondary; |
792 | for (pass = 0; pass < 2; pass++) { | |
793 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
794 | if (PCI_SLOT(dev->devfn) != slot->device) | |
795 | continue; | |
796 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || | |
797 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) | |
798 | max = pci_scan_bridge(bus, dev, max, pass); | |
799 | } | |
1da177e4 LT |
800 | } |
801 | ||
8e5dce35 | 802 | pci_bus_size_bridges(bus); |
42f49a6a | 803 | pci_bus_assign_resources(bus); |
8e5dce35 KA |
804 | acpiphp_sanitize_bus(bus); |
805 | pci_enable_bridges(bus); | |
42f49a6a | 806 | pci_bus_add_devices(bus); |
8e5dce35 KA |
807 | acpiphp_set_hpp_values(DEVICE_ACPI_HANDLE(&bus->self->dev), bus); |
808 | acpiphp_configure_ioapics(DEVICE_ACPI_HANDLE(&bus->self->dev)); | |
42f49a6a | 809 | |
1da177e4 LT |
810 | /* associate pci_dev to our representation */ |
811 | list_for_each (l, &slot->funcs) { | |
812 | func = list_entry(l, struct acpiphp_func, sibling); | |
42f49a6a | 813 | func->pci_dev = pci_get_slot(bus, PCI_DEVFN(slot->device, |
1da177e4 | 814 | func->function)); |
1da177e4 LT |
815 | } |
816 | ||
817 | slot->flags |= SLOT_ENABLED; | |
818 | ||
1da177e4 LT |
819 | err_exit: |
820 | return retval; | |
821 | } | |
822 | ||
823 | ||
824 | /** | |
825 | * disable_device - disable a slot | |
826 | */ | |
827 | static int disable_device(struct acpiphp_slot *slot) | |
828 | { | |
829 | int retval = 0; | |
830 | struct acpiphp_func *func; | |
831 | struct list_head *l; | |
832 | ||
833 | /* is this slot already disabled? */ | |
834 | if (!(slot->flags & SLOT_ENABLED)) | |
835 | goto err_exit; | |
836 | ||
837 | list_for_each (l, &slot->funcs) { | |
838 | func = list_entry(l, struct acpiphp_func, sibling); | |
42f49a6a RS |
839 | if (!func->pci_dev) |
840 | continue; | |
1da177e4 | 841 | |
42f49a6a RS |
842 | pci_remove_bus_device(func->pci_dev); |
843 | pci_dev_put(func->pci_dev); | |
844 | func->pci_dev = NULL; | |
1da177e4 LT |
845 | } |
846 | ||
847 | slot->flags &= (~SLOT_ENABLED); | |
848 | ||
849 | err_exit: | |
850 | return retval; | |
851 | } | |
852 | ||
853 | ||
854 | /** | |
855 | * get_slot_status - get ACPI slot status | |
856 | * | |
857 | * if a slot has _STA for each function and if any one of them | |
858 | * returned non-zero status, return it | |
859 | * | |
860 | * if a slot doesn't have _STA and if any one of its functions' | |
861 | * configuration space is configured, return 0x0f as a _STA | |
862 | * | |
863 | * otherwise return 0 | |
864 | */ | |
865 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
866 | { | |
867 | acpi_status status; | |
868 | unsigned long sta = 0; | |
869 | u32 dvid; | |
870 | struct list_head *l; | |
871 | struct acpiphp_func *func; | |
872 | ||
873 | list_for_each (l, &slot->funcs) { | |
874 | func = list_entry(l, struct acpiphp_func, sibling); | |
875 | ||
876 | if (func->flags & FUNC_HAS_STA) { | |
877 | status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); | |
878 | if (ACPI_SUCCESS(status) && sta) | |
879 | break; | |
880 | } else { | |
881 | pci_bus_read_config_dword(slot->bridge->pci_bus, | |
882 | PCI_DEVFN(slot->device, | |
883 | func->function), | |
884 | PCI_VENDOR_ID, &dvid); | |
885 | if (dvid != 0xffffffff) { | |
886 | sta = ACPI_STA_ALL; | |
887 | break; | |
888 | } | |
889 | } | |
890 | } | |
891 | ||
892 | return (unsigned int)sta; | |
893 | } | |
894 | ||
8d50e332 RS |
895 | /** |
896 | * acpiphp_eject_slot - physically eject the slot | |
897 | */ | |
898 | static int acpiphp_eject_slot(struct acpiphp_slot *slot) | |
899 | { | |
900 | acpi_status status; | |
901 | struct acpiphp_func *func; | |
902 | struct list_head *l; | |
903 | struct acpi_object_list arg_list; | |
904 | union acpi_object arg; | |
905 | ||
906 | list_for_each (l, &slot->funcs) { | |
907 | func = list_entry(l, struct acpiphp_func, sibling); | |
908 | ||
909 | /* We don't want to call _EJ0 on non-existing functions. */ | |
910 | if ((func->flags & FUNC_HAS_EJ0)) { | |
911 | /* _EJ0 method take one argument */ | |
912 | arg_list.count = 1; | |
913 | arg_list.pointer = &arg; | |
914 | arg.type = ACPI_TYPE_INTEGER; | |
915 | arg.integer.value = 1; | |
916 | ||
917 | status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); | |
918 | if (ACPI_FAILURE(status)) { | |
919 | warn("%s: _EJ0 failed\n", __FUNCTION__); | |
920 | return -1; | |
921 | } else | |
922 | break; | |
923 | } | |
924 | } | |
925 | return 0; | |
926 | } | |
927 | ||
1da177e4 LT |
928 | /** |
929 | * acpiphp_check_bridge - re-enumerate devices | |
930 | * | |
931 | * Iterate over all slots under this bridge and make sure that if a | |
932 | * card is present they are enabled, and if not they are disabled. | |
933 | */ | |
934 | static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) | |
935 | { | |
936 | struct acpiphp_slot *slot; | |
937 | int retval = 0; | |
938 | int enabled, disabled; | |
939 | ||
940 | enabled = disabled = 0; | |
941 | ||
942 | for (slot = bridge->slots; slot; slot = slot->next) { | |
943 | unsigned int status = get_slot_status(slot); | |
944 | if (slot->flags & SLOT_ENABLED) { | |
945 | if (status == ACPI_STA_ALL) | |
946 | continue; | |
947 | retval = acpiphp_disable_slot(slot); | |
948 | if (retval) { | |
949 | err("Error occurred in disabling\n"); | |
950 | goto err_exit; | |
8d50e332 RS |
951 | } else { |
952 | acpiphp_eject_slot(slot); | |
1da177e4 LT |
953 | } |
954 | disabled++; | |
955 | } else { | |
956 | if (status != ACPI_STA_ALL) | |
957 | continue; | |
958 | retval = acpiphp_enable_slot(slot); | |
959 | if (retval) { | |
960 | err("Error occurred in enabling\n"); | |
961 | goto err_exit; | |
962 | } | |
963 | enabled++; | |
964 | } | |
965 | } | |
966 | ||
967 | dbg("%s: %d enabled, %d disabled\n", __FUNCTION__, enabled, disabled); | |
968 | ||
969 | err_exit: | |
970 | return retval; | |
971 | } | |
972 | ||
8e7561cf RS |
973 | static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge) |
974 | { | |
975 | u16 pci_cmd, pci_bctl; | |
976 | struct pci_dev *cdev; | |
977 | ||
978 | /* Program hpp values for this device */ | |
979 | if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL || | |
980 | (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE && | |
981 | (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI))) | |
982 | return; | |
983 | pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, | |
984 | bridge->hpp.cache_line_size); | |
985 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, | |
986 | bridge->hpp.latency_timer); | |
987 | pci_read_config_word(dev, PCI_COMMAND, &pci_cmd); | |
988 | if (bridge->hpp.enable_SERR) | |
989 | pci_cmd |= PCI_COMMAND_SERR; | |
990 | else | |
991 | pci_cmd &= ~PCI_COMMAND_SERR; | |
992 | if (bridge->hpp.enable_PERR) | |
993 | pci_cmd |= PCI_COMMAND_PARITY; | |
994 | else | |
995 | pci_cmd &= ~PCI_COMMAND_PARITY; | |
996 | pci_write_config_word(dev, PCI_COMMAND, pci_cmd); | |
997 | ||
998 | /* Program bridge control value and child devices */ | |
999 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { | |
1000 | pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, | |
1001 | bridge->hpp.latency_timer); | |
1002 | pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl); | |
1003 | if (bridge->hpp.enable_SERR) | |
1004 | pci_bctl |= PCI_BRIDGE_CTL_SERR; | |
1005 | else | |
1006 | pci_bctl &= ~PCI_BRIDGE_CTL_SERR; | |
1007 | if (bridge->hpp.enable_PERR) | |
1008 | pci_bctl |= PCI_BRIDGE_CTL_PARITY; | |
1009 | else | |
1010 | pci_bctl &= ~PCI_BRIDGE_CTL_PARITY; | |
1011 | pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl); | |
1012 | if (dev->subordinate) { | |
1013 | list_for_each_entry(cdev, &dev->subordinate->devices, | |
1014 | bus_list) | |
1015 | program_hpp(cdev, bridge); | |
1016 | } | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus) | |
1021 | { | |
1022 | struct acpiphp_bridge bridge; | |
1023 | struct pci_dev *dev; | |
1024 | ||
1025 | memset(&bridge, 0, sizeof(bridge)); | |
1026 | bridge.handle = handle; | |
1027 | decode_hpp(&bridge); | |
1028 | list_for_each_entry(dev, &bus->devices, bus_list) | |
1029 | program_hpp(dev, &bridge); | |
1030 | ||
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * Remove devices for which we could not assign resources, call | |
1035 | * arch specific code to fix-up the bus | |
1036 | */ | |
1037 | static void acpiphp_sanitize_bus(struct pci_bus *bus) | |
1038 | { | |
1039 | struct pci_dev *dev; | |
1040 | int i; | |
1041 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; | |
1042 | ||
1043 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1044 | for (i=0; i<PCI_BRIDGE_RESOURCES; i++) { | |
1045 | struct resource *res = &dev->resource[i]; | |
1046 | if ((res->flags & type_mask) && !res->start && | |
1047 | res->end) { | |
1048 | /* Could not assign a required resources | |
1049 | * for this device, remove it */ | |
1050 | pci_remove_bus_device(dev); | |
1051 | break; | |
1052 | } | |
1053 | } | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | /* Program resources in newly inserted bridge */ | |
1058 | static int acpiphp_configure_bridge (acpi_handle handle) | |
1059 | { | |
1060 | struct acpi_pci_id pci_id; | |
1061 | struct pci_bus *bus; | |
1062 | ||
1063 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &pci_id))) { | |
1064 | err("cannot get PCI domain and bus number for bridge\n"); | |
1065 | return -EINVAL; | |
1066 | } | |
1067 | bus = pci_find_bus(pci_id.segment, pci_id.bus); | |
1068 | if (!bus) { | |
1069 | err("cannot find bus %d:%d\n", | |
1070 | pci_id.segment, pci_id.bus); | |
1071 | return -EINVAL; | |
1072 | } | |
1073 | ||
1074 | pci_bus_size_bridges(bus); | |
1075 | pci_bus_assign_resources(bus); | |
1076 | acpiphp_sanitize_bus(bus); | |
1077 | acpiphp_set_hpp_values(handle, bus); | |
1078 | pci_enable_bridges(bus); | |
a0d399a8 | 1079 | acpiphp_configure_ioapics(handle); |
8e7561cf RS |
1080 | return 0; |
1081 | } | |
1082 | ||
1083 | static void handle_bridge_insertion(acpi_handle handle, u32 type) | |
1084 | { | |
1085 | struct acpi_device *device, *pdevice; | |
1086 | acpi_handle phandle; | |
1087 | ||
1088 | if ((type != ACPI_NOTIFY_BUS_CHECK) && | |
1089 | (type != ACPI_NOTIFY_DEVICE_CHECK)) { | |
1090 | err("unexpected notification type %d\n", type); | |
1091 | return; | |
1092 | } | |
1093 | ||
1094 | acpi_get_parent(handle, &phandle); | |
1095 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1096 | dbg("no parent device, assuming NULL\n"); | |
1097 | pdevice = NULL; | |
1098 | } | |
1099 | if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) { | |
1100 | err("cannot add bridge to acpi list\n"); | |
1101 | return; | |
1102 | } | |
1103 | if (!acpiphp_configure_bridge(handle) && | |
1104 | !acpi_bus_start(device)) | |
1105 | add_bridge(handle); | |
1106 | else | |
1107 | err("cannot configure and start bridge\n"); | |
1108 | ||
1109 | } | |
1110 | ||
1da177e4 LT |
1111 | /* |
1112 | * ACPI event handlers | |
1113 | */ | |
1114 | ||
1115 | /** | |
1116 | * handle_hotplug_event_bridge - handle ACPI event on bridges | |
1117 | * | |
1118 | * @handle: Notify()'ed acpi_handle | |
1119 | * @type: Notify code | |
1120 | * @context: pointer to acpiphp_bridge structure | |
1121 | * | |
1122 | * handles ACPI event notification on {host,p2p} bridges | |
1123 | * | |
1124 | */ | |
1125 | static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context) | |
1126 | { | |
1127 | struct acpiphp_bridge *bridge; | |
1128 | char objname[64]; | |
1129 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1130 | .pointer = objname }; | |
8e7561cf | 1131 | struct acpi_device *device; |
1da177e4 | 1132 | |
8e7561cf RS |
1133 | if (acpi_bus_get_device(handle, &device)) { |
1134 | /* This bridge must have just been physically inserted */ | |
1135 | handle_bridge_insertion(handle, type); | |
1136 | return; | |
1137 | } | |
1138 | ||
1139 | bridge = acpiphp_handle_to_bridge(handle); | |
1140 | if (!bridge) { | |
1141 | err("cannot get bridge info\n"); | |
1142 | return; | |
1143 | } | |
1da177e4 LT |
1144 | |
1145 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1146 | ||
1147 | switch (type) { | |
1148 | case ACPI_NOTIFY_BUS_CHECK: | |
1149 | /* bus re-enumerate */ | |
1150 | dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname); | |
1151 | acpiphp_check_bridge(bridge); | |
1152 | break; | |
1153 | ||
1154 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1155 | /* device check */ | |
1156 | dbg("%s: Device check notify on %s\n", __FUNCTION__, objname); | |
1157 | acpiphp_check_bridge(bridge); | |
1158 | break; | |
1159 | ||
1160 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1161 | /* wake event */ | |
1162 | dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname); | |
1163 | break; | |
1164 | ||
1165 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1166 | /* request device eject */ | |
1167 | dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname); | |
1168 | break; | |
1169 | ||
1170 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1171 | printk(KERN_ERR "Device %s cannot be configured due" | |
1172 | " to a frequency mismatch\n", objname); | |
1173 | break; | |
1174 | ||
1175 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1176 | printk(KERN_ERR "Device %s cannot be configured due" | |
1177 | " to a bus mode mismatch\n", objname); | |
1178 | break; | |
1179 | ||
1180 | case ACPI_NOTIFY_POWER_FAULT: | |
1181 | printk(KERN_ERR "Device %s has suffered a power fault\n", | |
1182 | objname); | |
1183 | break; | |
1184 | ||
1185 | default: | |
1186 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1187 | break; | |
1188 | } | |
1189 | } | |
1190 | ||
1da177e4 LT |
1191 | /** |
1192 | * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) | |
1193 | * | |
1194 | * @handle: Notify()'ed acpi_handle | |
1195 | * @type: Notify code | |
1196 | * @context: pointer to acpiphp_func structure | |
1197 | * | |
1198 | * handles ACPI event notification on slots | |
1199 | * | |
1200 | */ | |
1201 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) | |
1202 | { | |
1203 | struct acpiphp_func *func; | |
1204 | char objname[64]; | |
1205 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1206 | .pointer = objname }; | |
1207 | ||
1208 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1209 | ||
1210 | func = (struct acpiphp_func *)context; | |
1211 | ||
1212 | switch (type) { | |
1213 | case ACPI_NOTIFY_BUS_CHECK: | |
1214 | /* bus re-enumerate */ | |
1215 | dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname); | |
1216 | acpiphp_enable_slot(func->slot); | |
1217 | break; | |
1218 | ||
1219 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1220 | /* device check : re-enumerate from parent bus */ | |
1221 | dbg("%s: Device check notify on %s\n", __FUNCTION__, objname); | |
1222 | acpiphp_check_bridge(func->slot->bridge); | |
1223 | break; | |
1224 | ||
1225 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1226 | /* wake event */ | |
1227 | dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname); | |
1228 | break; | |
1229 | ||
1230 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1231 | /* request device eject */ | |
1232 | dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname); | |
8d50e332 RS |
1233 | if (!(acpiphp_disable_slot(func->slot))) |
1234 | acpiphp_eject_slot(func->slot); | |
1da177e4 LT |
1235 | break; |
1236 | ||
1237 | default: | |
1238 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1239 | break; | |
1240 | } | |
1241 | } | |
1242 | ||
8e7561cf RS |
1243 | static int is_root_bridge(acpi_handle handle) |
1244 | { | |
1245 | acpi_status status; | |
1246 | struct acpi_device_info *info; | |
1247 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1248 | int i; | |
1249 | ||
1250 | status = acpi_get_object_info(handle, &buffer); | |
1251 | if (ACPI_SUCCESS(status)) { | |
1252 | info = buffer.pointer; | |
1253 | if ((info->valid & ACPI_VALID_HID) && | |
1254 | !strcmp(PCI_ROOT_HID_STRING, | |
1255 | info->hardware_id.value)) { | |
1256 | acpi_os_free(buffer.pointer); | |
1257 | return 1; | |
1258 | } | |
1259 | if (info->valid & ACPI_VALID_CID) { | |
1260 | for (i=0; i < info->compatibility_id.count; i++) { | |
1261 | if (!strcmp(PCI_ROOT_HID_STRING, | |
1262 | info->compatibility_id.id[i].value)) { | |
1263 | acpi_os_free(buffer.pointer); | |
1264 | return 1; | |
1265 | } | |
1266 | } | |
1267 | } | |
1268 | } | |
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | static acpi_status | |
1273 | find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1274 | { | |
1275 | int *count = (int *)context; | |
1276 | ||
1277 | if (is_root_bridge(handle)) { | |
1278 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
1279 | handle_hotplug_event_bridge, NULL); | |
1280 | (*count)++; | |
1281 | } | |
1282 | return AE_OK ; | |
1283 | } | |
1da177e4 LT |
1284 | |
1285 | static struct acpi_pci_driver acpi_pci_hp_driver = { | |
1286 | .add = add_bridge, | |
1287 | .remove = remove_bridge, | |
1288 | }; | |
1289 | ||
1290 | /** | |
1291 | * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures | |
1292 | * | |
1293 | */ | |
1294 | int __init acpiphp_glue_init(void) | |
1295 | { | |
8e7561cf | 1296 | int num = 0; |
1da177e4 | 1297 | |
8e7561cf RS |
1298 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
1299 | ACPI_UINT32_MAX, find_root_bridges, &num, NULL); | |
1da177e4 LT |
1300 | |
1301 | if (num <= 0) | |
1302 | return -1; | |
8e7561cf RS |
1303 | else |
1304 | acpi_pci_register_driver(&acpi_pci_hp_driver); | |
1da177e4 LT |
1305 | |
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | ||
1310 | /** | |
1311 | * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures | |
1312 | * | |
1313 | * This function frees all data allocated in acpiphp_glue_init() | |
1314 | */ | |
1315 | void __exit acpiphp_glue_exit(void) | |
1316 | { | |
1da177e4 LT |
1317 | acpi_pci_unregister_driver(&acpi_pci_hp_driver); |
1318 | } | |
1319 | ||
1320 | ||
1321 | /** | |
1322 | * acpiphp_get_num_slots - count number of slots in a system | |
1323 | */ | |
1324 | int __init acpiphp_get_num_slots(void) | |
1325 | { | |
1326 | struct list_head *node; | |
1327 | struct acpiphp_bridge *bridge; | |
1328 | int num_slots; | |
1329 | ||
1330 | num_slots = 0; | |
1331 | ||
1332 | list_for_each (node, &bridge_list) { | |
1333 | bridge = (struct acpiphp_bridge *)node; | |
42f49a6a RS |
1334 | dbg("Bus %04x:%02x has %d slot%s\n", |
1335 | pci_domain_nr(bridge->pci_bus), | |
1336 | bridge->pci_bus->number, bridge->nr_slots, | |
1337 | bridge->nr_slots == 1 ? "" : "s"); | |
1da177e4 LT |
1338 | num_slots += bridge->nr_slots; |
1339 | } | |
1340 | ||
42f49a6a | 1341 | dbg("Total %d slots\n", num_slots); |
1da177e4 LT |
1342 | return num_slots; |
1343 | } | |
1344 | ||
1345 | ||
1346 | #if 0 | |
1347 | /** | |
1348 | * acpiphp_for_each_slot - call function for each slot | |
1349 | * @fn: callback function | |
1350 | * @data: context to be passed to callback function | |
1351 | * | |
1352 | */ | |
1353 | static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) | |
1354 | { | |
1355 | struct list_head *node; | |
1356 | struct acpiphp_bridge *bridge; | |
1357 | struct acpiphp_slot *slot; | |
1358 | int retval = 0; | |
1359 | ||
1360 | list_for_each (node, &bridge_list) { | |
1361 | bridge = (struct acpiphp_bridge *)node; | |
1362 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1363 | retval = fn(slot, data); | |
1364 | if (!retval) | |
1365 | goto err_exit; | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | err_exit: | |
1370 | return retval; | |
1371 | } | |
1372 | #endif | |
1373 | ||
1374 | /* search matching slot from id */ | |
1375 | struct acpiphp_slot *get_slot_from_id(int id) | |
1376 | { | |
1377 | struct list_head *node; | |
1378 | struct acpiphp_bridge *bridge; | |
1379 | struct acpiphp_slot *slot; | |
1380 | ||
1381 | list_for_each (node, &bridge_list) { | |
1382 | bridge = (struct acpiphp_bridge *)node; | |
1383 | for (slot = bridge->slots; slot; slot = slot->next) | |
1384 | if (slot->id == id) | |
1385 | return slot; | |
1386 | } | |
1387 | ||
1388 | /* should never happen! */ | |
1389 | err("%s: no object for id %d\n", __FUNCTION__, id); | |
1390 | WARN_ON(1); | |
1391 | return NULL; | |
1392 | } | |
1393 | ||
1394 | ||
1395 | /** | |
1396 | * acpiphp_enable_slot - power on slot | |
1397 | */ | |
1398 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
1399 | { | |
1400 | int retval; | |
1401 | ||
1402 | down(&slot->crit_sect); | |
1403 | ||
1404 | /* wake up all functions */ | |
1405 | retval = power_on_slot(slot); | |
1406 | if (retval) | |
1407 | goto err_exit; | |
1408 | ||
1409 | if (get_slot_status(slot) == ACPI_STA_ALL) | |
1410 | /* configure all functions */ | |
1411 | retval = enable_device(slot); | |
1412 | ||
1413 | err_exit: | |
1414 | up(&slot->crit_sect); | |
1415 | return retval; | |
1416 | } | |
1417 | ||
1da177e4 LT |
1418 | /** |
1419 | * acpiphp_disable_slot - power off slot | |
1420 | */ | |
1421 | int acpiphp_disable_slot(struct acpiphp_slot *slot) | |
1422 | { | |
1423 | int retval = 0; | |
1424 | ||
1425 | down(&slot->crit_sect); | |
1426 | ||
1427 | /* unconfigure all functions */ | |
1428 | retval = disable_device(slot); | |
1429 | if (retval) | |
1430 | goto err_exit; | |
1431 | ||
1432 | /* power off all functions */ | |
1433 | retval = power_off_slot(slot); | |
1434 | if (retval) | |
1435 | goto err_exit; | |
1436 | ||
1da177e4 LT |
1437 | err_exit: |
1438 | up(&slot->crit_sect); | |
1439 | return retval; | |
1440 | } | |
1441 | ||
1442 | ||
1443 | /* | |
1444 | * slot enabled: 1 | |
1445 | * slot disabled: 0 | |
1446 | */ | |
1447 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
1448 | { | |
8d50e332 | 1449 | return (slot->flags & SLOT_POWEREDON); |
1da177e4 LT |
1450 | } |
1451 | ||
1452 | ||
1453 | /* | |
1454 | * latch closed: 1 | |
1455 | * latch open: 0 | |
1456 | */ | |
1457 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1458 | { | |
1459 | unsigned int sta; | |
1460 | ||
1461 | sta = get_slot_status(slot); | |
1462 | ||
1463 | return (sta & ACPI_STA_SHOW_IN_UI) ? 1 : 0; | |
1464 | } | |
1465 | ||
1466 | ||
1467 | /* | |
1468 | * adapter presence : 1 | |
1469 | * absence : 0 | |
1470 | */ | |
1471 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1472 | { | |
1473 | unsigned int sta; | |
1474 | ||
1475 | sta = get_slot_status(slot); | |
1476 | ||
1477 | return (sta == 0) ? 0 : 1; | |
1478 | } | |
1479 | ||
1480 | ||
1481 | /* | |
1482 | * pci address (seg/bus/dev) | |
1483 | */ | |
1484 | u32 acpiphp_get_address(struct acpiphp_slot *slot) | |
1485 | { | |
1486 | u32 address; | |
42f49a6a | 1487 | struct pci_bus *pci_bus = slot->bridge->pci_bus; |
1da177e4 | 1488 | |
42f49a6a RS |
1489 | address = (pci_domain_nr(pci_bus) << 16) | |
1490 | (pci_bus->number << 8) | | |
1da177e4 LT |
1491 | slot->device; |
1492 | ||
1493 | return address; | |
1494 | } |