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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> | |
6aa4cdd0 | 49 | #include <linux/mutex.h> |
1da177e4 LT |
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 *); | |
8e5dce35 KA |
60 | static void acpiphp_sanitize_bus(struct pci_bus *bus); |
61 | static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus); | |
2b85e130 | 62 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context); |
8e5dce35 | 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 | ||
4e8662bb KA |
120 | /* callback routine to check for the existance of a pci dock device */ |
121 | static acpi_status | |
122 | is_pci_dock_device(acpi_handle handle, u32 lvl, void *context, void **rv) | |
123 | { | |
124 | int *count = (int *)context; | |
125 | ||
126 | if (is_dock_device(handle)) { | |
127 | (*count)++; | |
128 | return AE_CTRL_TERMINATE; | |
129 | } else { | |
130 | return AE_OK; | |
131 | } | |
132 | } | |
133 | ||
134 | ||
135 | ||
136 | ||
137 | /* | |
138 | * the _DCK method can do funny things... and sometimes not | |
139 | * hah-hah funny. | |
140 | * | |
141 | * TBD - figure out a way to only call fixups for | |
142 | * systems that require them. | |
143 | */ | |
144 | static int post_dock_fixups(struct notifier_block *nb, unsigned long val, | |
145 | void *v) | |
146 | { | |
147 | struct acpiphp_func *func = container_of(nb, struct acpiphp_func, nb); | |
148 | struct pci_bus *bus = func->slot->bridge->pci_bus; | |
149 | u32 buses; | |
150 | ||
151 | if (!bus->self) | |
152 | return NOTIFY_OK; | |
153 | ||
154 | /* fixup bad _DCK function that rewrites | |
155 | * secondary bridge on slot | |
156 | */ | |
157 | pci_read_config_dword(bus->self, | |
158 | PCI_PRIMARY_BUS, | |
159 | &buses); | |
160 | ||
161 | if (((buses >> 8) & 0xff) != bus->secondary) { | |
162 | buses = (buses & 0xff000000) | |
163 | | ((unsigned int)(bus->primary) << 0) | |
164 | | ((unsigned int)(bus->secondary) << 8) | |
165 | | ((unsigned int)(bus->subordinate) << 16); | |
166 | pci_write_config_dword(bus->self, PCI_PRIMARY_BUS, buses); | |
167 | } | |
168 | return NOTIFY_OK; | |
169 | } | |
170 | ||
171 | ||
172 | ||
1da177e4 LT |
173 | |
174 | /* callback routine to register each ACPI PCI slot object */ | |
175 | static acpi_status | |
176 | register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) | |
177 | { | |
178 | struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context; | |
179 | struct acpiphp_slot *slot; | |
180 | struct acpiphp_func *newfunc; | |
181 | acpi_handle tmp; | |
182 | acpi_status status = AE_OK; | |
183 | unsigned long adr, sun; | |
e27da381 | 184 | int device, function, retval; |
1da177e4 LT |
185 | |
186 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr); | |
187 | ||
188 | if (ACPI_FAILURE(status)) | |
189 | return AE_OK; | |
190 | ||
191 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
192 | ||
4e8662bb | 193 | if (ACPI_FAILURE(status) && !(is_dock_device(handle))) |
1da177e4 LT |
194 | return AE_OK; |
195 | ||
196 | device = (adr >> 16) & 0xffff; | |
197 | function = adr & 0xffff; | |
198 | ||
f5afe806 | 199 | newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL); |
1da177e4 LT |
200 | if (!newfunc) |
201 | return AE_NO_MEMORY; | |
1da177e4 LT |
202 | |
203 | INIT_LIST_HEAD(&newfunc->sibling); | |
204 | newfunc->handle = handle; | |
205 | newfunc->function = function; | |
20416ea5 KA |
206 | if (ACPI_SUCCESS(status)) |
207 | newfunc->flags = FUNC_HAS_EJ0; | |
1da177e4 LT |
208 | |
209 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp))) | |
210 | newfunc->flags |= FUNC_HAS_STA; | |
211 | ||
212 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp))) | |
213 | newfunc->flags |= FUNC_HAS_PS0; | |
214 | ||
215 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) | |
216 | newfunc->flags |= FUNC_HAS_PS3; | |
217 | ||
4e8662bb | 218 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp))) |
20416ea5 | 219 | newfunc->flags |= FUNC_HAS_DCK; |
20416ea5 | 220 | |
1da177e4 LT |
221 | status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); |
222 | if (ACPI_FAILURE(status)) | |
223 | sun = -1; | |
224 | ||
225 | /* search for objects that share the same slot */ | |
226 | for (slot = bridge->slots; slot; slot = slot->next) | |
227 | if (slot->device == device) { | |
228 | if (slot->sun != sun) | |
229 | warn("sibling found, but _SUN doesn't match!\n"); | |
230 | break; | |
231 | } | |
232 | ||
233 | if (!slot) { | |
f5afe806 | 234 | slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); |
1da177e4 LT |
235 | if (!slot) { |
236 | kfree(newfunc); | |
237 | return AE_NO_MEMORY; | |
238 | } | |
239 | ||
1da177e4 | 240 | slot->bridge = bridge; |
1da177e4 LT |
241 | slot->device = device; |
242 | slot->sun = sun; | |
243 | INIT_LIST_HEAD(&slot->funcs); | |
6aa4cdd0 | 244 | mutex_init(&slot->crit_sect); |
1da177e4 LT |
245 | |
246 | slot->next = bridge->slots; | |
247 | bridge->slots = slot; | |
248 | ||
249 | bridge->nr_slots++; | |
250 | ||
42f49a6a RS |
251 | dbg("found ACPI PCI Hotplug slot %d at PCI %04x:%02x:%02x\n", |
252 | slot->sun, pci_domain_nr(bridge->pci_bus), | |
253 | bridge->pci_bus->number, slot->device); | |
e27da381 MT |
254 | retval = acpiphp_register_hotplug_slot(slot); |
255 | if (retval) { | |
256 | warn("acpiphp_register_hotplug_slot failed(err code = 0x%x)\n", retval); | |
257 | goto err_exit; | |
258 | } | |
1da177e4 LT |
259 | } |
260 | ||
261 | newfunc->slot = slot; | |
262 | list_add_tail(&newfunc->sibling, &slot->funcs); | |
263 | ||
264 | /* associate corresponding pci_dev */ | |
42f49a6a | 265 | newfunc->pci_dev = pci_get_slot(bridge->pci_bus, |
1da177e4 LT |
266 | PCI_DEVFN(device, function)); |
267 | if (newfunc->pci_dev) { | |
1da177e4 LT |
268 | slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); |
269 | } | |
270 | ||
4e8662bb KA |
271 | if (is_dock_device(handle)) { |
272 | /* we don't want to call this device's _EJ0 | |
273 | * because we want the dock notify handler | |
274 | * to call it after it calls _DCK | |
20416ea5 KA |
275 | */ |
276 | newfunc->flags &= ~FUNC_HAS_EJ0; | |
4e8662bb KA |
277 | if (register_hotplug_dock_device(handle, |
278 | handle_hotplug_event_func, newfunc)) | |
279 | dbg("failed to register dock device\n"); | |
280 | ||
281 | /* we need to be notified when dock events happen | |
282 | * outside of the hotplug operation, since we may | |
283 | * need to do fixups before we can hotplug. | |
284 | */ | |
285 | newfunc->nb.notifier_call = post_dock_fixups; | |
286 | if (register_dock_notifier(&newfunc->nb)) | |
287 | dbg("failed to register a dock notifier"); | |
20416ea5 KA |
288 | } |
289 | ||
1da177e4 | 290 | /* install notify handler */ |
20416ea5 KA |
291 | if (!(newfunc->flags & FUNC_HAS_DCK)) { |
292 | status = acpi_install_notify_handler(handle, | |
1da177e4 LT |
293 | ACPI_SYSTEM_NOTIFY, |
294 | handle_hotplug_event_func, | |
295 | newfunc); | |
296 | ||
20416ea5 KA |
297 | if (ACPI_FAILURE(status)) |
298 | err("failed to register interrupt notify handler\n"); | |
299 | } else | |
300 | status = AE_OK; | |
1da177e4 | 301 | |
20416ea5 | 302 | return status; |
e27da381 MT |
303 | |
304 | err_exit: | |
305 | bridge->nr_slots--; | |
306 | bridge->slots = slot->next; | |
307 | kfree(slot); | |
308 | kfree(newfunc); | |
309 | ||
310 | return AE_OK; | |
1da177e4 LT |
311 | } |
312 | ||
313 | ||
314 | /* see if it's worth looking at this bridge */ | |
315 | static int detect_ejectable_slots(acpi_handle *bridge_handle) | |
316 | { | |
317 | acpi_status status; | |
318 | int count; | |
319 | ||
320 | count = 0; | |
321 | ||
322 | /* only check slots defined directly below bridge object */ | |
323 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1, | |
324 | is_ejectable_slot, (void *)&count, NULL); | |
325 | ||
4e8662bb KA |
326 | /* |
327 | * we also need to add this bridge if there is a dock bridge or | |
328 | * other pci device on a dock station (removable) | |
329 | */ | |
330 | if (!count) | |
331 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, | |
332 | (u32)1, is_pci_dock_device, (void *)&count, | |
333 | NULL); | |
334 | ||
1da177e4 LT |
335 | return count; |
336 | } | |
337 | ||
338 | ||
1da177e4 LT |
339 | /* decode ACPI 2.0 _HPP hot plug parameters */ |
340 | static void decode_hpp(struct acpiphp_bridge *bridge) | |
341 | { | |
342 | acpi_status status; | |
1da177e4 | 343 | |
7430e34c | 344 | status = acpi_get_hp_params_from_firmware(bridge->pci_bus, &bridge->hpp); |
e22b7350 KK |
345 | if (ACPI_FAILURE(status) || |
346 | !bridge->hpp.t0 || (bridge->hpp.t0->revision > 1)) { | |
783c49fc | 347 | /* use default numbers */ |
e22b7350 KK |
348 | printk(KERN_WARNING |
349 | "%s: Could not get hotplug parameters. Use defaults\n", | |
350 | __FUNCTION__); | |
351 | bridge->hpp.t0 = &bridge->hpp.type0_data; | |
352 | bridge->hpp.t0->revision = 0; | |
353 | bridge->hpp.t0->cache_line_size = 0x10; | |
354 | bridge->hpp.t0->latency_timer = 0x40; | |
355 | bridge->hpp.t0->enable_serr = 0; | |
356 | bridge->hpp.t0->enable_perr = 0; | |
1da177e4 | 357 | } |
1da177e4 LT |
358 | } |
359 | ||
360 | ||
783c49fc | 361 | |
1da177e4 LT |
362 | /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */ |
363 | static void init_bridge_misc(struct acpiphp_bridge *bridge) | |
364 | { | |
365 | acpi_status status; | |
366 | ||
367 | /* decode ACPI 2.0 _HPP (hot plug parameters) */ | |
368 | decode_hpp(bridge); | |
369 | ||
e27da381 MT |
370 | /* must be added to the list prior to calling register_slot */ |
371 | list_add(&bridge->list, &bridge_list); | |
372 | ||
1da177e4 LT |
373 | /* register all slot objects under this bridge */ |
374 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1, | |
375 | register_slot, bridge, NULL); | |
e27da381 MT |
376 | if (ACPI_FAILURE(status)) { |
377 | list_del(&bridge->list); | |
378 | return; | |
379 | } | |
1da177e4 LT |
380 | |
381 | /* install notify handler */ | |
8e7561cf | 382 | if (bridge->type != BRIDGE_TYPE_HOST) { |
551bcb75 MT |
383 | if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) { |
384 | status = acpi_remove_notify_handler(bridge->func->handle, | |
385 | ACPI_SYSTEM_NOTIFY, | |
386 | handle_hotplug_event_func); | |
387 | if (ACPI_FAILURE(status)) | |
388 | err("failed to remove notify handler\n"); | |
389 | } | |
8e7561cf | 390 | status = acpi_install_notify_handler(bridge->handle, |
1da177e4 LT |
391 | ACPI_SYSTEM_NOTIFY, |
392 | handle_hotplug_event_bridge, | |
393 | bridge); | |
394 | ||
8e7561cf RS |
395 | if (ACPI_FAILURE(status)) { |
396 | err("failed to register interrupt notify handler\n"); | |
397 | } | |
1da177e4 | 398 | } |
1da177e4 LT |
399 | } |
400 | ||
401 | ||
551bcb75 MT |
402 | /* find acpiphp_func from acpiphp_bridge */ |
403 | static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle) | |
404 | { | |
405 | struct list_head *node, *l; | |
406 | struct acpiphp_bridge *bridge; | |
407 | struct acpiphp_slot *slot; | |
408 | struct acpiphp_func *func; | |
409 | ||
410 | list_for_each(node, &bridge_list) { | |
411 | bridge = list_entry(node, struct acpiphp_bridge, list); | |
412 | for (slot = bridge->slots; slot; slot = slot->next) { | |
413 | list_for_each(l, &slot->funcs) { | |
414 | func = list_entry(l, struct acpiphp_func, | |
415 | sibling); | |
416 | if (func->handle == handle) | |
417 | return func; | |
418 | } | |
419 | } | |
420 | } | |
421 | ||
422 | return NULL; | |
423 | } | |
424 | ||
425 | ||
426 | static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge) | |
427 | { | |
428 | acpi_handle dummy_handle; | |
429 | ||
430 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
431 | "_STA", &dummy_handle))) | |
432 | bridge->flags |= BRIDGE_HAS_STA; | |
433 | ||
434 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
435 | "_EJ0", &dummy_handle))) | |
436 | bridge->flags |= BRIDGE_HAS_EJ0; | |
437 | ||
438 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
439 | "_PS0", &dummy_handle))) | |
440 | bridge->flags |= BRIDGE_HAS_PS0; | |
441 | ||
442 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
443 | "_PS3", &dummy_handle))) | |
444 | bridge->flags |= BRIDGE_HAS_PS3; | |
445 | ||
446 | /* is this ejectable p2p bridge? */ | |
447 | if (bridge->flags & BRIDGE_HAS_EJ0) { | |
448 | struct acpiphp_func *func; | |
449 | ||
450 | dbg("found ejectable p2p bridge\n"); | |
451 | ||
452 | /* make link between PCI bridge and PCI function */ | |
453 | func = acpiphp_bridge_handle_to_function(bridge->handle); | |
454 | if (!func) | |
455 | return; | |
456 | bridge->func = func; | |
457 | func->bridge = bridge; | |
458 | } | |
459 | } | |
460 | ||
461 | ||
1da177e4 | 462 | /* allocate and initialize host bridge data structure */ |
42f49a6a | 463 | static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus) |
1da177e4 | 464 | { |
1da177e4 LT |
465 | struct acpiphp_bridge *bridge; |
466 | ||
f5afe806 | 467 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
468 | if (bridge == NULL) |
469 | return; | |
470 | ||
1da177e4 LT |
471 | bridge->type = BRIDGE_TYPE_HOST; |
472 | bridge->handle = handle; | |
1da177e4 | 473 | |
42f49a6a | 474 | bridge->pci_bus = pci_bus; |
1da177e4 LT |
475 | |
476 | spin_lock_init(&bridge->res_lock); | |
477 | ||
1da177e4 LT |
478 | init_bridge_misc(bridge); |
479 | } | |
480 | ||
481 | ||
482 | /* allocate and initialize PCI-to-PCI bridge data structure */ | |
42f49a6a | 483 | static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev) |
1da177e4 LT |
484 | { |
485 | struct acpiphp_bridge *bridge; | |
1da177e4 | 486 | |
f5afe806 | 487 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
488 | if (bridge == NULL) { |
489 | err("out of memory\n"); | |
490 | return; | |
491 | } | |
492 | ||
1da177e4 LT |
493 | bridge->type = BRIDGE_TYPE_P2P; |
494 | bridge->handle = handle; | |
551bcb75 | 495 | config_p2p_bridge_flags(bridge); |
1da177e4 | 496 | |
42f49a6a RS |
497 | bridge->pci_dev = pci_dev_get(pci_dev); |
498 | bridge->pci_bus = pci_dev->subordinate; | |
1da177e4 LT |
499 | if (!bridge->pci_bus) { |
500 | err("This is not a PCI-to-PCI bridge!\n"); | |
42f49a6a | 501 | goto err; |
1da177e4 LT |
502 | } |
503 | ||
504 | spin_lock_init(&bridge->res_lock); | |
505 | ||
1da177e4 | 506 | init_bridge_misc(bridge); |
42f49a6a RS |
507 | return; |
508 | err: | |
509 | pci_dev_put(pci_dev); | |
510 | kfree(bridge); | |
511 | return; | |
1da177e4 LT |
512 | } |
513 | ||
514 | ||
515 | /* callback routine to find P2P bridges */ | |
516 | static acpi_status | |
517 | find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
518 | { | |
519 | acpi_status status; | |
520 | acpi_handle dummy_handle; | |
1da177e4 | 521 | unsigned long tmp; |
42f49a6a | 522 | int device, function; |
1da177e4 | 523 | struct pci_dev *dev; |
42f49a6a | 524 | struct pci_bus *pci_bus = context; |
1da177e4 LT |
525 | |
526 | status = acpi_get_handle(handle, "_ADR", &dummy_handle); | |
527 | if (ACPI_FAILURE(status)) | |
528 | return AE_OK; /* continue */ | |
529 | ||
530 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp); | |
531 | if (ACPI_FAILURE(status)) { | |
532 | dbg("%s: _ADR evaluation failure\n", __FUNCTION__); | |
533 | return AE_OK; | |
534 | } | |
535 | ||
536 | device = (tmp >> 16) & 0xffff; | |
537 | function = tmp & 0xffff; | |
538 | ||
42f49a6a | 539 | dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function)); |
1da177e4 | 540 | |
42f49a6a RS |
541 | if (!dev || !dev->subordinate) |
542 | goto out; | |
1da177e4 LT |
543 | |
544 | /* check if this bridge has ejectable slots */ | |
4e8662bb | 545 | if ((detect_ejectable_slots(handle) > 0)) { |
1da177e4 | 546 | dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); |
42f49a6a | 547 | add_p2p_bridge(handle, dev); |
1da177e4 LT |
548 | } |
549 | ||
7c8f25da KK |
550 | /* search P2P bridges under this p2p bridge */ |
551 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
552 | find_p2p_bridge, dev->subordinate, NULL); | |
553 | if (ACPI_FAILURE(status)) | |
551bcb75 | 554 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
7c8f25da | 555 | |
42f49a6a RS |
556 | out: |
557 | pci_dev_put(dev); | |
1da177e4 LT |
558 | return AE_OK; |
559 | } | |
560 | ||
561 | ||
562 | /* find hot-pluggable slots, and then find P2P bridge */ | |
563 | static int add_bridge(acpi_handle handle) | |
564 | { | |
565 | acpi_status status; | |
566 | unsigned long tmp; | |
567 | int seg, bus; | |
568 | acpi_handle dummy_handle; | |
42f49a6a | 569 | struct pci_bus *pci_bus; |
1da177e4 LT |
570 | |
571 | /* if the bridge doesn't have _STA, we assume it is always there */ | |
572 | status = acpi_get_handle(handle, "_STA", &dummy_handle); | |
573 | if (ACPI_SUCCESS(status)) { | |
574 | status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp); | |
575 | if (ACPI_FAILURE(status)) { | |
576 | dbg("%s: _STA evaluation failure\n", __FUNCTION__); | |
577 | return 0; | |
578 | } | |
579 | if ((tmp & ACPI_STA_FUNCTIONING) == 0) | |
580 | /* don't register this object */ | |
581 | return 0; | |
582 | } | |
583 | ||
584 | /* get PCI segment number */ | |
585 | status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp); | |
586 | ||
587 | seg = ACPI_SUCCESS(status) ? tmp : 0; | |
588 | ||
589 | /* get PCI bus number */ | |
590 | status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp); | |
591 | ||
592 | if (ACPI_SUCCESS(status)) { | |
593 | bus = tmp; | |
594 | } else { | |
595 | warn("can't get bus number, assuming 0\n"); | |
596 | bus = 0; | |
597 | } | |
598 | ||
42f49a6a RS |
599 | pci_bus = pci_find_bus(seg, bus); |
600 | if (!pci_bus) { | |
601 | err("Can't find bus %04x:%02x\n", seg, bus); | |
602 | return 0; | |
603 | } | |
604 | ||
1da177e4 LT |
605 | /* check if this bridge has ejectable slots */ |
606 | if (detect_ejectable_slots(handle) > 0) { | |
607 | dbg("found PCI host-bus bridge with hot-pluggable slots\n"); | |
42f49a6a | 608 | add_host_bridge(handle, pci_bus); |
1da177e4 LT |
609 | } |
610 | ||
1da177e4 LT |
611 | /* search P2P bridges under this host bridge */ |
612 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
42f49a6a | 613 | find_p2p_bridge, pci_bus, NULL); |
1da177e4 LT |
614 | |
615 | if (ACPI_FAILURE(status)) | |
551bcb75 | 616 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
1da177e4 LT |
617 | |
618 | return 0; | |
619 | } | |
620 | ||
42f49a6a RS |
621 | static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle) |
622 | { | |
623 | struct list_head *head; | |
624 | list_for_each(head, &bridge_list) { | |
625 | struct acpiphp_bridge *bridge = list_entry(head, | |
626 | struct acpiphp_bridge, list); | |
627 | if (bridge->handle == handle) | |
628 | return bridge; | |
629 | } | |
630 | ||
631 | return NULL; | |
632 | } | |
1da177e4 | 633 | |
364d5094 | 634 | static void cleanup_bridge(struct acpiphp_bridge *bridge) |
1da177e4 | 635 | { |
42f49a6a | 636 | struct list_head *list, *tmp; |
42f49a6a RS |
637 | struct acpiphp_slot *slot; |
638 | acpi_status status; | |
364d5094 | 639 | acpi_handle handle = bridge->handle; |
42f49a6a RS |
640 | |
641 | status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
642 | handle_hotplug_event_bridge); | |
643 | if (ACPI_FAILURE(status)) | |
644 | err("failed to remove notify handler\n"); | |
645 | ||
551bcb75 MT |
646 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
647 | ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) { | |
648 | status = acpi_install_notify_handler(bridge->func->handle, | |
649 | ACPI_SYSTEM_NOTIFY, | |
650 | handle_hotplug_event_func, | |
651 | bridge->func); | |
652 | if (ACPI_FAILURE(status)) | |
653 | err("failed to install interrupt notify handler\n"); | |
654 | } | |
655 | ||
42f49a6a RS |
656 | slot = bridge->slots; |
657 | while (slot) { | |
658 | struct acpiphp_slot *next = slot->next; | |
659 | list_for_each_safe (list, tmp, &slot->funcs) { | |
660 | struct acpiphp_func *func; | |
661 | func = list_entry(list, struct acpiphp_func, sibling); | |
4e8662bb KA |
662 | if (is_dock_device(func->handle)) { |
663 | unregister_hotplug_dock_device(func->handle); | |
664 | unregister_dock_notifier(&func->nb); | |
665 | } | |
20416ea5 KA |
666 | if (!(func->flags & FUNC_HAS_DCK)) { |
667 | status = acpi_remove_notify_handler(func->handle, | |
42f49a6a RS |
668 | ACPI_SYSTEM_NOTIFY, |
669 | handle_hotplug_event_func); | |
20416ea5 KA |
670 | if (ACPI_FAILURE(status)) |
671 | err("failed to remove notify handler\n"); | |
672 | } | |
42f49a6a RS |
673 | pci_dev_put(func->pci_dev); |
674 | list_del(list); | |
675 | kfree(func); | |
676 | } | |
e27da381 MT |
677 | acpiphp_unregister_hotplug_slot(slot); |
678 | list_del(&slot->funcs); | |
42f49a6a RS |
679 | kfree(slot); |
680 | slot = next; | |
681 | } | |
682 | ||
683 | pci_dev_put(bridge->pci_dev); | |
684 | list_del(&bridge->list); | |
685 | kfree(bridge); | |
1da177e4 LT |
686 | } |
687 | ||
364d5094 RS |
688 | static acpi_status |
689 | cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
690 | { | |
691 | struct acpiphp_bridge *bridge; | |
692 | ||
551bcb75 MT |
693 | /* cleanup p2p bridges under this P2P bridge |
694 | in a depth-first manner */ | |
695 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
696 | cleanup_p2p_bridge, NULL, NULL); | |
697 | ||
364d5094 RS |
698 | if (!(bridge = acpiphp_handle_to_bridge(handle))) |
699 | return AE_OK; | |
700 | cleanup_bridge(bridge); | |
701 | return AE_OK; | |
702 | } | |
703 | ||
704 | static void remove_bridge(acpi_handle handle) | |
705 | { | |
706 | struct acpiphp_bridge *bridge; | |
707 | ||
551bcb75 MT |
708 | /* cleanup p2p bridges under this host bridge |
709 | in a depth-first manner */ | |
710 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
711 | (u32)1, cleanup_p2p_bridge, NULL, NULL); | |
712 | ||
364d5094 | 713 | bridge = acpiphp_handle_to_bridge(handle); |
551bcb75 | 714 | if (bridge) |
364d5094 | 715 | cleanup_bridge(bridge); |
364d5094 | 716 | } |
1da177e4 | 717 | |
a0d399a8 KK |
718 | static struct pci_dev * get_apic_pci_info(acpi_handle handle) |
719 | { | |
720 | struct acpi_pci_id id; | |
721 | struct pci_bus *bus; | |
722 | struct pci_dev *dev; | |
723 | ||
724 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &id))) | |
725 | return NULL; | |
726 | ||
727 | bus = pci_find_bus(id.segment, id.bus); | |
728 | if (!bus) | |
729 | return NULL; | |
730 | ||
731 | dev = pci_get_slot(bus, PCI_DEVFN(id.device, id.function)); | |
732 | if (!dev) | |
733 | return NULL; | |
734 | ||
735 | if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) && | |
736 | (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC)) | |
737 | { | |
738 | pci_dev_put(dev); | |
739 | return NULL; | |
740 | } | |
741 | ||
742 | return dev; | |
743 | } | |
744 | ||
745 | static int get_gsi_base(acpi_handle handle, u32 *gsi_base) | |
746 | { | |
747 | acpi_status status; | |
748 | int result = -1; | |
749 | unsigned long gsb; | |
750 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
751 | union acpi_object *obj; | |
752 | void *table; | |
753 | ||
754 | status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb); | |
755 | if (ACPI_SUCCESS(status)) { | |
756 | *gsi_base = (u32)gsb; | |
757 | return 0; | |
758 | } | |
759 | ||
760 | status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer); | |
761 | if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer) | |
762 | return -1; | |
763 | ||
764 | obj = buffer.pointer; | |
765 | if (obj->type != ACPI_TYPE_BUFFER) | |
766 | goto out; | |
767 | ||
768 | table = obj->buffer.pointer; | |
769 | switch (((acpi_table_entry_header *)table)->type) { | |
770 | case ACPI_MADT_IOSAPIC: | |
771 | *gsi_base = ((struct acpi_table_iosapic *)table)->global_irq_base; | |
772 | result = 0; | |
773 | break; | |
774 | case ACPI_MADT_IOAPIC: | |
775 | *gsi_base = ((struct acpi_table_ioapic *)table)->global_irq_base; | |
776 | result = 0; | |
777 | break; | |
778 | default: | |
779 | break; | |
780 | } | |
781 | out: | |
81b26bca | 782 | kfree(buffer.pointer); |
a0d399a8 KK |
783 | return result; |
784 | } | |
785 | ||
786 | static acpi_status | |
787 | ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv) | |
788 | { | |
789 | acpi_status status; | |
790 | unsigned long sta; | |
791 | acpi_handle tmp; | |
792 | struct pci_dev *pdev; | |
793 | u32 gsi_base; | |
794 | u64 phys_addr; | |
795 | ||
796 | /* Evaluate _STA if present */ | |
797 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
798 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
799 | return AE_CTRL_DEPTH; | |
800 | ||
801 | /* Scan only PCI bus scope */ | |
802 | status = acpi_get_handle(handle, "_HID", &tmp); | |
803 | if (ACPI_SUCCESS(status)) | |
804 | return AE_CTRL_DEPTH; | |
805 | ||
806 | if (get_gsi_base(handle, &gsi_base)) | |
807 | return AE_OK; | |
808 | ||
809 | pdev = get_apic_pci_info(handle); | |
810 | if (!pdev) | |
811 | return AE_OK; | |
812 | ||
813 | if (pci_enable_device(pdev)) { | |
814 | pci_dev_put(pdev); | |
815 | return AE_OK; | |
816 | } | |
817 | ||
818 | pci_set_master(pdev); | |
819 | ||
820 | if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)")) { | |
821 | pci_disable_device(pdev); | |
822 | pci_dev_put(pdev); | |
823 | return AE_OK; | |
824 | } | |
825 | ||
826 | phys_addr = pci_resource_start(pdev, 0); | |
827 | if (acpi_register_ioapic(handle, phys_addr, gsi_base)) { | |
828 | pci_release_region(pdev, 0); | |
829 | pci_disable_device(pdev); | |
830 | pci_dev_put(pdev); | |
831 | return AE_OK; | |
832 | } | |
833 | ||
834 | return AE_OK; | |
835 | } | |
836 | ||
837 | static int acpiphp_configure_ioapics(acpi_handle handle) | |
838 | { | |
839 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
840 | ACPI_UINT32_MAX, ioapic_add, NULL, NULL); | |
841 | return 0; | |
842 | } | |
843 | ||
1da177e4 LT |
844 | static int power_on_slot(struct acpiphp_slot *slot) |
845 | { | |
846 | acpi_status status; | |
847 | struct acpiphp_func *func; | |
848 | struct list_head *l; | |
849 | int retval = 0; | |
850 | ||
851 | /* if already enabled, just skip */ | |
852 | if (slot->flags & SLOT_POWEREDON) | |
853 | goto err_exit; | |
854 | ||
855 | list_for_each (l, &slot->funcs) { | |
856 | func = list_entry(l, struct acpiphp_func, sibling); | |
857 | ||
858 | if (func->flags & FUNC_HAS_PS0) { | |
859 | dbg("%s: executing _PS0\n", __FUNCTION__); | |
860 | status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); | |
861 | if (ACPI_FAILURE(status)) { | |
862 | warn("%s: _PS0 failed\n", __FUNCTION__); | |
863 | retval = -1; | |
864 | goto err_exit; | |
865 | } else | |
866 | break; | |
867 | } | |
868 | } | |
869 | ||
870 | /* TBD: evaluate _STA to check if the slot is enabled */ | |
871 | ||
872 | slot->flags |= SLOT_POWEREDON; | |
873 | ||
874 | err_exit: | |
875 | return retval; | |
876 | } | |
877 | ||
878 | ||
879 | static int power_off_slot(struct acpiphp_slot *slot) | |
880 | { | |
881 | acpi_status status; | |
882 | struct acpiphp_func *func; | |
883 | struct list_head *l; | |
1da177e4 LT |
884 | |
885 | int retval = 0; | |
886 | ||
887 | /* if already disabled, just skip */ | |
888 | if ((slot->flags & SLOT_POWEREDON) == 0) | |
889 | goto err_exit; | |
890 | ||
891 | list_for_each (l, &slot->funcs) { | |
892 | func = list_entry(l, struct acpiphp_func, sibling); | |
893 | ||
2f523b15 | 894 | if (func->flags & FUNC_HAS_PS3) { |
1da177e4 LT |
895 | status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); |
896 | if (ACPI_FAILURE(status)) { | |
897 | warn("%s: _PS3 failed\n", __FUNCTION__); | |
898 | retval = -1; | |
899 | goto err_exit; | |
900 | } else | |
901 | break; | |
902 | } | |
903 | } | |
904 | ||
1da177e4 LT |
905 | /* TBD: evaluate _STA to check if the slot is disabled */ |
906 | ||
907 | slot->flags &= (~SLOT_POWEREDON); | |
908 | ||
909 | err_exit: | |
910 | return retval; | |
911 | } | |
912 | ||
913 | ||
15a1ae74 KA |
914 | |
915 | /** | |
916 | * acpiphp_max_busnr - return the highest reserved bus number under | |
917 | * the given bus. | |
918 | * @bus: bus to start search with | |
919 | * | |
920 | */ | |
921 | static unsigned char acpiphp_max_busnr(struct pci_bus *bus) | |
922 | { | |
923 | struct list_head *tmp; | |
924 | unsigned char max, n; | |
925 | ||
926 | /* | |
927 | * pci_bus_max_busnr will return the highest | |
928 | * reserved busnr for all these children. | |
929 | * that is equivalent to the bus->subordinate | |
930 | * value. We don't want to use the parent's | |
931 | * bus->subordinate value because it could have | |
932 | * padding in it. | |
933 | */ | |
934 | max = bus->secondary; | |
935 | ||
936 | list_for_each(tmp, &bus->children) { | |
937 | n = pci_bus_max_busnr(pci_bus_b(tmp)); | |
938 | if (n > max) | |
939 | max = n; | |
940 | } | |
941 | return max; | |
942 | } | |
943 | ||
944 | ||
15a1ae74 KA |
945 | /** |
946 | * acpiphp_bus_add - add a new bus to acpi subsystem | |
947 | * @func: acpiphp_func of the bridge | |
948 | * | |
949 | */ | |
950 | static int acpiphp_bus_add(struct acpiphp_func *func) | |
951 | { | |
952 | acpi_handle phandle; | |
953 | struct acpi_device *device, *pdevice; | |
954 | int ret_val; | |
955 | ||
956 | acpi_get_parent(func->handle, &phandle); | |
957 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
958 | dbg("no parent device, assuming NULL\n"); | |
959 | pdevice = NULL; | |
960 | } | |
20416ea5 KA |
961 | if (!acpi_bus_get_device(func->handle, &device)) { |
962 | dbg("bus exists... trim\n"); | |
963 | /* this shouldn't be in here, so remove | |
964 | * the bus then re-add it... | |
965 | */ | |
966 | ret_val = acpi_bus_trim(device, 1); | |
967 | dbg("acpi_bus_trim return %x\n", ret_val); | |
968 | } | |
969 | ||
970 | ret_val = acpi_bus_add(&device, pdevice, func->handle, | |
971 | ACPI_BUS_TYPE_DEVICE); | |
972 | if (ret_val) { | |
973 | dbg("error adding bus, %x\n", | |
974 | -ret_val); | |
975 | goto acpiphp_bus_add_out; | |
15a1ae74 KA |
976 | } |
977 | /* | |
978 | * try to start anyway. We could have failed to add | |
979 | * simply because this bus had previously been added | |
980 | * on another add. Don't bother with the return value | |
981 | * we just keep going. | |
982 | */ | |
983 | ret_val = acpi_bus_start(device); | |
984 | ||
985 | acpiphp_bus_add_out: | |
986 | return ret_val; | |
987 | } | |
988 | ||
989 | ||
92c9be95 MT |
990 | /** |
991 | * acpiphp_bus_trim - trim a bus from acpi subsystem | |
992 | * @handle: handle to acpi namespace | |
993 | * | |
994 | */ | |
995 | int acpiphp_bus_trim(acpi_handle handle) | |
996 | { | |
997 | struct acpi_device *device; | |
998 | int retval; | |
999 | ||
1000 | retval = acpi_bus_get_device(handle, &device); | |
1001 | if (retval) { | |
1002 | dbg("acpi_device not found\n"); | |
1003 | return retval; | |
1004 | } | |
1005 | ||
1006 | retval = acpi_bus_trim(device, 1); | |
1007 | if (retval) | |
1008 | err("cannot remove from acpi list\n"); | |
1009 | ||
1010 | return retval; | |
1011 | } | |
15a1ae74 | 1012 | |
1da177e4 LT |
1013 | /** |
1014 | * enable_device - enable, configure a slot | |
1015 | * @slot: slot to be enabled | |
1016 | * | |
1017 | * This function should be called per *physical slot*, | |
1018 | * not per each slot object in ACPI namespace. | |
1019 | * | |
1020 | */ | |
1021 | static int enable_device(struct acpiphp_slot *slot) | |
1022 | { | |
1da177e4 | 1023 | struct pci_dev *dev; |
42f49a6a | 1024 | struct pci_bus *bus = slot->bridge->pci_bus; |
1da177e4 LT |
1025 | struct list_head *l; |
1026 | struct acpiphp_func *func; | |
1027 | int retval = 0; | |
42f49a6a | 1028 | int num, max, pass; |
551bcb75 | 1029 | acpi_status status; |
1da177e4 LT |
1030 | |
1031 | if (slot->flags & SLOT_ENABLED) | |
1032 | goto err_exit; | |
1033 | ||
1034 | /* sanity check: dev should be NULL when hot-plugged in */ | |
42f49a6a | 1035 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0)); |
1da177e4 LT |
1036 | if (dev) { |
1037 | /* This case shouldn't happen */ | |
1038 | err("pci_dev structure already exists.\n"); | |
42f49a6a | 1039 | pci_dev_put(dev); |
1da177e4 LT |
1040 | retval = -1; |
1041 | goto err_exit; | |
1042 | } | |
1043 | ||
42f49a6a RS |
1044 | num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0)); |
1045 | if (num == 0) { | |
1da177e4 LT |
1046 | err("No new device found\n"); |
1047 | retval = -1; | |
1048 | goto err_exit; | |
1049 | } | |
1050 | ||
15a1ae74 | 1051 | max = acpiphp_max_busnr(bus); |
42f49a6a RS |
1052 | for (pass = 0; pass < 2; pass++) { |
1053 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1054 | if (PCI_SLOT(dev->devfn) != slot->device) | |
1055 | continue; | |
1056 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || | |
c64b5eea | 1057 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
42f49a6a | 1058 | max = pci_scan_bridge(bus, dev, max, pass); |
92c9be95 | 1059 | if (pass && dev->subordinate) |
c64b5eea KA |
1060 | pci_bus_size_bridges(dev->subordinate); |
1061 | } | |
42f49a6a | 1062 | } |
1da177e4 LT |
1063 | } |
1064 | ||
92c9be95 MT |
1065 | list_for_each (l, &slot->funcs) { |
1066 | func = list_entry(l, struct acpiphp_func, sibling); | |
1067 | acpiphp_bus_add(func); | |
1068 | } | |
1069 | ||
42f49a6a | 1070 | pci_bus_assign_resources(bus); |
8e5dce35 KA |
1071 | acpiphp_sanitize_bus(bus); |
1072 | pci_enable_bridges(bus); | |
42f49a6a | 1073 | pci_bus_add_devices(bus); |
0cccd0c2 MT |
1074 | acpiphp_set_hpp_values(slot->bridge->handle, bus); |
1075 | acpiphp_configure_ioapics(slot->bridge->handle); | |
42f49a6a | 1076 | |
1da177e4 LT |
1077 | /* associate pci_dev to our representation */ |
1078 | list_for_each (l, &slot->funcs) { | |
1079 | func = list_entry(l, struct acpiphp_func, sibling); | |
42f49a6a | 1080 | func->pci_dev = pci_get_slot(bus, PCI_DEVFN(slot->device, |
1da177e4 | 1081 | func->function)); |
551bcb75 MT |
1082 | if (!func->pci_dev) |
1083 | continue; | |
1084 | ||
1085 | if (func->pci_dev->hdr_type != PCI_HEADER_TYPE_BRIDGE && | |
1086 | func->pci_dev->hdr_type != PCI_HEADER_TYPE_CARDBUS) | |
1087 | continue; | |
1088 | ||
1089 | status = find_p2p_bridge(func->handle, (u32)1, bus, NULL); | |
1090 | if (ACPI_FAILURE(status)) | |
1091 | warn("find_p2p_bridge failed (error code = 0x%x)\n", | |
1092 | status); | |
1da177e4 LT |
1093 | } |
1094 | ||
1095 | slot->flags |= SLOT_ENABLED; | |
1096 | ||
1da177e4 LT |
1097 | err_exit: |
1098 | return retval; | |
1099 | } | |
1100 | ||
1101 | ||
1102 | /** | |
1103 | * disable_device - disable a slot | |
1104 | */ | |
1105 | static int disable_device(struct acpiphp_slot *slot) | |
1106 | { | |
1107 | int retval = 0; | |
1108 | struct acpiphp_func *func; | |
1109 | struct list_head *l; | |
1110 | ||
1111 | /* is this slot already disabled? */ | |
1112 | if (!(slot->flags & SLOT_ENABLED)) | |
1113 | goto err_exit; | |
1114 | ||
1115 | list_for_each (l, &slot->funcs) { | |
1116 | func = list_entry(l, struct acpiphp_func, sibling); | |
92c9be95 | 1117 | |
551bcb75 MT |
1118 | if (func->bridge) { |
1119 | /* cleanup p2p bridges under this P2P bridge */ | |
1120 | cleanup_p2p_bridge(func->bridge->handle, | |
1121 | (u32)1, NULL, NULL); | |
1122 | func->bridge = NULL; | |
1123 | } | |
1124 | ||
92c9be95 MT |
1125 | acpiphp_bus_trim(func->handle); |
1126 | /* try to remove anyway. | |
1127 | * acpiphp_bus_add might have been failed */ | |
1128 | ||
42f49a6a RS |
1129 | if (!func->pci_dev) |
1130 | continue; | |
1da177e4 | 1131 | |
42f49a6a RS |
1132 | pci_remove_bus_device(func->pci_dev); |
1133 | pci_dev_put(func->pci_dev); | |
1134 | func->pci_dev = NULL; | |
1da177e4 LT |
1135 | } |
1136 | ||
1137 | slot->flags &= (~SLOT_ENABLED); | |
1138 | ||
1139 | err_exit: | |
1140 | return retval; | |
1141 | } | |
1142 | ||
1143 | ||
1144 | /** | |
1145 | * get_slot_status - get ACPI slot status | |
1146 | * | |
1147 | * if a slot has _STA for each function and if any one of them | |
1148 | * returned non-zero status, return it | |
1149 | * | |
1150 | * if a slot doesn't have _STA and if any one of its functions' | |
1151 | * configuration space is configured, return 0x0f as a _STA | |
1152 | * | |
1153 | * otherwise return 0 | |
1154 | */ | |
1155 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
1156 | { | |
1157 | acpi_status status; | |
1158 | unsigned long sta = 0; | |
1159 | u32 dvid; | |
1160 | struct list_head *l; | |
1161 | struct acpiphp_func *func; | |
1162 | ||
1163 | list_for_each (l, &slot->funcs) { | |
1164 | func = list_entry(l, struct acpiphp_func, sibling); | |
1165 | ||
1166 | if (func->flags & FUNC_HAS_STA) { | |
1167 | status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); | |
1168 | if (ACPI_SUCCESS(status) && sta) | |
1169 | break; | |
1170 | } else { | |
1171 | pci_bus_read_config_dword(slot->bridge->pci_bus, | |
1172 | PCI_DEVFN(slot->device, | |
1173 | func->function), | |
1174 | PCI_VENDOR_ID, &dvid); | |
1175 | if (dvid != 0xffffffff) { | |
1176 | sta = ACPI_STA_ALL; | |
1177 | break; | |
1178 | } | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | return (unsigned int)sta; | |
1183 | } | |
1184 | ||
8d50e332 RS |
1185 | /** |
1186 | * acpiphp_eject_slot - physically eject the slot | |
1187 | */ | |
1188 | static int acpiphp_eject_slot(struct acpiphp_slot *slot) | |
1189 | { | |
1190 | acpi_status status; | |
1191 | struct acpiphp_func *func; | |
1192 | struct list_head *l; | |
1193 | struct acpi_object_list arg_list; | |
1194 | union acpi_object arg; | |
1195 | ||
1196 | list_for_each (l, &slot->funcs) { | |
1197 | func = list_entry(l, struct acpiphp_func, sibling); | |
1198 | ||
1199 | /* We don't want to call _EJ0 on non-existing functions. */ | |
1200 | if ((func->flags & FUNC_HAS_EJ0)) { | |
1201 | /* _EJ0 method take one argument */ | |
1202 | arg_list.count = 1; | |
1203 | arg_list.pointer = &arg; | |
1204 | arg.type = ACPI_TYPE_INTEGER; | |
1205 | arg.integer.value = 1; | |
1206 | ||
1207 | status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); | |
1208 | if (ACPI_FAILURE(status)) { | |
1209 | warn("%s: _EJ0 failed\n", __FUNCTION__); | |
1210 | return -1; | |
1211 | } else | |
1212 | break; | |
1213 | } | |
1214 | } | |
1215 | return 0; | |
1216 | } | |
1217 | ||
1da177e4 LT |
1218 | /** |
1219 | * acpiphp_check_bridge - re-enumerate devices | |
1220 | * | |
1221 | * Iterate over all slots under this bridge and make sure that if a | |
1222 | * card is present they are enabled, and if not they are disabled. | |
1223 | */ | |
1224 | static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) | |
1225 | { | |
1226 | struct acpiphp_slot *slot; | |
1227 | int retval = 0; | |
1228 | int enabled, disabled; | |
1229 | ||
1230 | enabled = disabled = 0; | |
1231 | ||
1232 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1233 | unsigned int status = get_slot_status(slot); | |
1234 | if (slot->flags & SLOT_ENABLED) { | |
1235 | if (status == ACPI_STA_ALL) | |
1236 | continue; | |
1237 | retval = acpiphp_disable_slot(slot); | |
1238 | if (retval) { | |
1239 | err("Error occurred in disabling\n"); | |
1240 | goto err_exit; | |
8d50e332 RS |
1241 | } else { |
1242 | acpiphp_eject_slot(slot); | |
1da177e4 LT |
1243 | } |
1244 | disabled++; | |
1245 | } else { | |
1246 | if (status != ACPI_STA_ALL) | |
1247 | continue; | |
1248 | retval = acpiphp_enable_slot(slot); | |
1249 | if (retval) { | |
1250 | err("Error occurred in enabling\n"); | |
1251 | goto err_exit; | |
1252 | } | |
1253 | enabled++; | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | dbg("%s: %d enabled, %d disabled\n", __FUNCTION__, enabled, disabled); | |
1258 | ||
1259 | err_exit: | |
1260 | return retval; | |
1261 | } | |
1262 | ||
8e7561cf RS |
1263 | static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge) |
1264 | { | |
1265 | u16 pci_cmd, pci_bctl; | |
1266 | struct pci_dev *cdev; | |
1267 | ||
1268 | /* Program hpp values for this device */ | |
1269 | if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL || | |
1270 | (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE && | |
1271 | (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI))) | |
1272 | return; | |
e22b7350 | 1273 | |
8e7561cf | 1274 | pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, |
e22b7350 | 1275 | bridge->hpp.t0->cache_line_size); |
8e7561cf | 1276 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, |
e22b7350 | 1277 | bridge->hpp.t0->latency_timer); |
8e7561cf | 1278 | pci_read_config_word(dev, PCI_COMMAND, &pci_cmd); |
e22b7350 | 1279 | if (bridge->hpp.t0->enable_serr) |
8e7561cf RS |
1280 | pci_cmd |= PCI_COMMAND_SERR; |
1281 | else | |
1282 | pci_cmd &= ~PCI_COMMAND_SERR; | |
e22b7350 | 1283 | if (bridge->hpp.t0->enable_perr) |
8e7561cf RS |
1284 | pci_cmd |= PCI_COMMAND_PARITY; |
1285 | else | |
1286 | pci_cmd &= ~PCI_COMMAND_PARITY; | |
1287 | pci_write_config_word(dev, PCI_COMMAND, pci_cmd); | |
1288 | ||
1289 | /* Program bridge control value and child devices */ | |
1290 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { | |
1291 | pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, | |
e22b7350 | 1292 | bridge->hpp.t0->latency_timer); |
8e7561cf | 1293 | pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl); |
e22b7350 | 1294 | if (bridge->hpp.t0->enable_serr) |
8e7561cf RS |
1295 | pci_bctl |= PCI_BRIDGE_CTL_SERR; |
1296 | else | |
1297 | pci_bctl &= ~PCI_BRIDGE_CTL_SERR; | |
e22b7350 | 1298 | if (bridge->hpp.t0->enable_perr) |
8e7561cf RS |
1299 | pci_bctl |= PCI_BRIDGE_CTL_PARITY; |
1300 | else | |
1301 | pci_bctl &= ~PCI_BRIDGE_CTL_PARITY; | |
1302 | pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl); | |
1303 | if (dev->subordinate) { | |
1304 | list_for_each_entry(cdev, &dev->subordinate->devices, | |
1305 | bus_list) | |
1306 | program_hpp(cdev, bridge); | |
1307 | } | |
1308 | } | |
1309 | } | |
1310 | ||
1311 | static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus) | |
1312 | { | |
1313 | struct acpiphp_bridge bridge; | |
1314 | struct pci_dev *dev; | |
1315 | ||
1316 | memset(&bridge, 0, sizeof(bridge)); | |
1317 | bridge.handle = handle; | |
7430e34c | 1318 | bridge.pci_bus = bus; |
783c49fc | 1319 | bridge.pci_dev = bus->self; |
8e7561cf RS |
1320 | decode_hpp(&bridge); |
1321 | list_for_each_entry(dev, &bus->devices, bus_list) | |
1322 | program_hpp(dev, &bridge); | |
1323 | ||
1324 | } | |
1325 | ||
1326 | /* | |
1327 | * Remove devices for which we could not assign resources, call | |
1328 | * arch specific code to fix-up the bus | |
1329 | */ | |
1330 | static void acpiphp_sanitize_bus(struct pci_bus *bus) | |
1331 | { | |
1332 | struct pci_dev *dev; | |
1333 | int i; | |
1334 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; | |
1335 | ||
1336 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1337 | for (i=0; i<PCI_BRIDGE_RESOURCES; i++) { | |
1338 | struct resource *res = &dev->resource[i]; | |
1339 | if ((res->flags & type_mask) && !res->start && | |
1340 | res->end) { | |
1341 | /* Could not assign a required resources | |
1342 | * for this device, remove it */ | |
1343 | pci_remove_bus_device(dev); | |
1344 | break; | |
1345 | } | |
1346 | } | |
1347 | } | |
1348 | } | |
1349 | ||
1350 | /* Program resources in newly inserted bridge */ | |
1351 | static int acpiphp_configure_bridge (acpi_handle handle) | |
1352 | { | |
1353 | struct acpi_pci_id pci_id; | |
1354 | struct pci_bus *bus; | |
1355 | ||
1356 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &pci_id))) { | |
1357 | err("cannot get PCI domain and bus number for bridge\n"); | |
1358 | return -EINVAL; | |
1359 | } | |
1360 | bus = pci_find_bus(pci_id.segment, pci_id.bus); | |
1361 | if (!bus) { | |
1362 | err("cannot find bus %d:%d\n", | |
1363 | pci_id.segment, pci_id.bus); | |
1364 | return -EINVAL; | |
1365 | } | |
1366 | ||
1367 | pci_bus_size_bridges(bus); | |
1368 | pci_bus_assign_resources(bus); | |
1369 | acpiphp_sanitize_bus(bus); | |
1370 | acpiphp_set_hpp_values(handle, bus); | |
1371 | pci_enable_bridges(bus); | |
a0d399a8 | 1372 | acpiphp_configure_ioapics(handle); |
8e7561cf RS |
1373 | return 0; |
1374 | } | |
1375 | ||
1376 | static void handle_bridge_insertion(acpi_handle handle, u32 type) | |
1377 | { | |
1378 | struct acpi_device *device, *pdevice; | |
1379 | acpi_handle phandle; | |
1380 | ||
1381 | if ((type != ACPI_NOTIFY_BUS_CHECK) && | |
1382 | (type != ACPI_NOTIFY_DEVICE_CHECK)) { | |
1383 | err("unexpected notification type %d\n", type); | |
1384 | return; | |
1385 | } | |
1386 | ||
1387 | acpi_get_parent(handle, &phandle); | |
1388 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1389 | dbg("no parent device, assuming NULL\n"); | |
1390 | pdevice = NULL; | |
1391 | } | |
1392 | if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) { | |
1393 | err("cannot add bridge to acpi list\n"); | |
1394 | return; | |
1395 | } | |
1396 | if (!acpiphp_configure_bridge(handle) && | |
1397 | !acpi_bus_start(device)) | |
1398 | add_bridge(handle); | |
1399 | else | |
1400 | err("cannot configure and start bridge\n"); | |
1401 | ||
1402 | } | |
1403 | ||
1da177e4 LT |
1404 | /* |
1405 | * ACPI event handlers | |
1406 | */ | |
1407 | ||
1408 | /** | |
1409 | * handle_hotplug_event_bridge - handle ACPI event on bridges | |
1410 | * | |
1411 | * @handle: Notify()'ed acpi_handle | |
1412 | * @type: Notify code | |
1413 | * @context: pointer to acpiphp_bridge structure | |
1414 | * | |
1415 | * handles ACPI event notification on {host,p2p} bridges | |
1416 | * | |
1417 | */ | |
1418 | static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context) | |
1419 | { | |
1420 | struct acpiphp_bridge *bridge; | |
1421 | char objname[64]; | |
1422 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1423 | .pointer = objname }; | |
8e7561cf | 1424 | struct acpi_device *device; |
1da177e4 | 1425 | |
8e7561cf RS |
1426 | if (acpi_bus_get_device(handle, &device)) { |
1427 | /* This bridge must have just been physically inserted */ | |
1428 | handle_bridge_insertion(handle, type); | |
1429 | return; | |
1430 | } | |
1431 | ||
1432 | bridge = acpiphp_handle_to_bridge(handle); | |
1433 | if (!bridge) { | |
1434 | err("cannot get bridge info\n"); | |
1435 | return; | |
1436 | } | |
1da177e4 LT |
1437 | |
1438 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1439 | ||
1440 | switch (type) { | |
1441 | case ACPI_NOTIFY_BUS_CHECK: | |
1442 | /* bus re-enumerate */ | |
1443 | dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname); | |
1444 | acpiphp_check_bridge(bridge); | |
1445 | break; | |
1446 | ||
1447 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1448 | /* device check */ | |
1449 | dbg("%s: Device check notify on %s\n", __FUNCTION__, objname); | |
1450 | acpiphp_check_bridge(bridge); | |
1451 | break; | |
1452 | ||
1453 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1454 | /* wake event */ | |
1455 | dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname); | |
1456 | break; | |
1457 | ||
1458 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1459 | /* request device eject */ | |
1460 | dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname); | |
551bcb75 MT |
1461 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
1462 | (bridge->flags & BRIDGE_HAS_EJ0)) { | |
1463 | struct acpiphp_slot *slot; | |
1464 | slot = bridge->func->slot; | |
1465 | if (!acpiphp_disable_slot(slot)) | |
1466 | acpiphp_eject_slot(slot); | |
1467 | } | |
1da177e4 LT |
1468 | break; |
1469 | ||
1470 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1471 | printk(KERN_ERR "Device %s cannot be configured due" | |
1472 | " to a frequency mismatch\n", objname); | |
1473 | break; | |
1474 | ||
1475 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1476 | printk(KERN_ERR "Device %s cannot be configured due" | |
1477 | " to a bus mode mismatch\n", objname); | |
1478 | break; | |
1479 | ||
1480 | case ACPI_NOTIFY_POWER_FAULT: | |
1481 | printk(KERN_ERR "Device %s has suffered a power fault\n", | |
1482 | objname); | |
1483 | break; | |
1484 | ||
1485 | default: | |
1486 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1487 | break; | |
1488 | } | |
1489 | } | |
1490 | ||
1da177e4 LT |
1491 | /** |
1492 | * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) | |
1493 | * | |
1494 | * @handle: Notify()'ed acpi_handle | |
1495 | * @type: Notify code | |
1496 | * @context: pointer to acpiphp_func structure | |
1497 | * | |
1498 | * handles ACPI event notification on slots | |
1499 | * | |
1500 | */ | |
2b85e130 | 1501 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) |
1da177e4 LT |
1502 | { |
1503 | struct acpiphp_func *func; | |
1504 | char objname[64]; | |
1505 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1506 | .pointer = objname }; | |
1507 | ||
1508 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1509 | ||
1510 | func = (struct acpiphp_func *)context; | |
1511 | ||
1512 | switch (type) { | |
1513 | case ACPI_NOTIFY_BUS_CHECK: | |
1514 | /* bus re-enumerate */ | |
1515 | dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname); | |
1516 | acpiphp_enable_slot(func->slot); | |
1517 | break; | |
1518 | ||
1519 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1520 | /* device check : re-enumerate from parent bus */ | |
1521 | dbg("%s: Device check notify on %s\n", __FUNCTION__, objname); | |
1522 | acpiphp_check_bridge(func->slot->bridge); | |
1523 | break; | |
1524 | ||
1525 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1526 | /* wake event */ | |
1527 | dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname); | |
1528 | break; | |
1529 | ||
1530 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1531 | /* request device eject */ | |
1532 | dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname); | |
8d50e332 RS |
1533 | if (!(acpiphp_disable_slot(func->slot))) |
1534 | acpiphp_eject_slot(func->slot); | |
1da177e4 LT |
1535 | break; |
1536 | ||
1537 | default: | |
1538 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1539 | break; | |
1540 | } | |
1541 | } | |
1542 | ||
8e7561cf RS |
1543 | |
1544 | static acpi_status | |
1545 | find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1546 | { | |
1547 | int *count = (int *)context; | |
1548 | ||
783c49fc | 1549 | if (acpi_root_bridge(handle)) { |
8e7561cf RS |
1550 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1551 | handle_hotplug_event_bridge, NULL); | |
1552 | (*count)++; | |
1553 | } | |
1554 | return AE_OK ; | |
1555 | } | |
1da177e4 LT |
1556 | |
1557 | static struct acpi_pci_driver acpi_pci_hp_driver = { | |
1558 | .add = add_bridge, | |
1559 | .remove = remove_bridge, | |
1560 | }; | |
1561 | ||
1562 | /** | |
1563 | * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures | |
1564 | * | |
1565 | */ | |
1566 | int __init acpiphp_glue_init(void) | |
1567 | { | |
8e7561cf | 1568 | int num = 0; |
1da177e4 | 1569 | |
8e7561cf RS |
1570 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
1571 | ACPI_UINT32_MAX, find_root_bridges, &num, NULL); | |
1da177e4 LT |
1572 | |
1573 | if (num <= 0) | |
1574 | return -1; | |
8e7561cf RS |
1575 | else |
1576 | acpi_pci_register_driver(&acpi_pci_hp_driver); | |
1da177e4 LT |
1577 | |
1578 | return 0; | |
1579 | } | |
1580 | ||
1581 | ||
1582 | /** | |
1583 | * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures | |
1584 | * | |
1585 | * This function frees all data allocated in acpiphp_glue_init() | |
1586 | */ | |
1587 | void __exit acpiphp_glue_exit(void) | |
1588 | { | |
1da177e4 LT |
1589 | acpi_pci_unregister_driver(&acpi_pci_hp_driver); |
1590 | } | |
1591 | ||
1592 | ||
1593 | /** | |
1594 | * acpiphp_get_num_slots - count number of slots in a system | |
1595 | */ | |
1596 | int __init acpiphp_get_num_slots(void) | |
1597 | { | |
1598 | struct list_head *node; | |
1599 | struct acpiphp_bridge *bridge; | |
1600 | int num_slots; | |
1601 | ||
1602 | num_slots = 0; | |
1603 | ||
1604 | list_for_each (node, &bridge_list) { | |
1605 | bridge = (struct acpiphp_bridge *)node; | |
42f49a6a RS |
1606 | dbg("Bus %04x:%02x has %d slot%s\n", |
1607 | pci_domain_nr(bridge->pci_bus), | |
1608 | bridge->pci_bus->number, bridge->nr_slots, | |
1609 | bridge->nr_slots == 1 ? "" : "s"); | |
1da177e4 LT |
1610 | num_slots += bridge->nr_slots; |
1611 | } | |
1612 | ||
42f49a6a | 1613 | dbg("Total %d slots\n", num_slots); |
1da177e4 LT |
1614 | return num_slots; |
1615 | } | |
1616 | ||
1617 | ||
1618 | #if 0 | |
1619 | /** | |
1620 | * acpiphp_for_each_slot - call function for each slot | |
1621 | * @fn: callback function | |
1622 | * @data: context to be passed to callback function | |
1623 | * | |
1624 | */ | |
1625 | static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) | |
1626 | { | |
1627 | struct list_head *node; | |
1628 | struct acpiphp_bridge *bridge; | |
1629 | struct acpiphp_slot *slot; | |
1630 | int retval = 0; | |
1631 | ||
1632 | list_for_each (node, &bridge_list) { | |
1633 | bridge = (struct acpiphp_bridge *)node; | |
1634 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1635 | retval = fn(slot, data); | |
1636 | if (!retval) | |
1637 | goto err_exit; | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | err_exit: | |
1642 | return retval; | |
1643 | } | |
1644 | #endif | |
1645 | ||
1da177e4 LT |
1646 | |
1647 | /** | |
1648 | * acpiphp_enable_slot - power on slot | |
1649 | */ | |
1650 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
1651 | { | |
1652 | int retval; | |
1653 | ||
6aa4cdd0 | 1654 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1655 | |
1656 | /* wake up all functions */ | |
1657 | retval = power_on_slot(slot); | |
1658 | if (retval) | |
1659 | goto err_exit; | |
1660 | ||
cde0e5d7 | 1661 | if (get_slot_status(slot) == ACPI_STA_ALL) { |
1da177e4 LT |
1662 | /* configure all functions */ |
1663 | retval = enable_device(slot); | |
cde0e5d7 MT |
1664 | if (retval) |
1665 | power_off_slot(slot); | |
1666 | } else { | |
1667 | dbg("%s: Slot status is not ACPI_STA_ALL\n", __FUNCTION__); | |
1668 | power_off_slot(slot); | |
1669 | } | |
1da177e4 LT |
1670 | |
1671 | err_exit: | |
6aa4cdd0 | 1672 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1673 | return retval; |
1674 | } | |
1675 | ||
1da177e4 LT |
1676 | /** |
1677 | * acpiphp_disable_slot - power off slot | |
1678 | */ | |
1679 | int acpiphp_disable_slot(struct acpiphp_slot *slot) | |
1680 | { | |
1681 | int retval = 0; | |
1682 | ||
6aa4cdd0 | 1683 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1684 | |
1685 | /* unconfigure all functions */ | |
1686 | retval = disable_device(slot); | |
1687 | if (retval) | |
1688 | goto err_exit; | |
1689 | ||
1690 | /* power off all functions */ | |
1691 | retval = power_off_slot(slot); | |
1692 | if (retval) | |
1693 | goto err_exit; | |
1694 | ||
1da177e4 | 1695 | err_exit: |
6aa4cdd0 | 1696 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1697 | return retval; |
1698 | } | |
1699 | ||
1700 | ||
1701 | /* | |
1702 | * slot enabled: 1 | |
1703 | * slot disabled: 0 | |
1704 | */ | |
1705 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
1706 | { | |
8d50e332 | 1707 | return (slot->flags & SLOT_POWEREDON); |
1da177e4 LT |
1708 | } |
1709 | ||
1710 | ||
1711 | /* | |
1712 | * latch closed: 1 | |
1713 | * latch open: 0 | |
1714 | */ | |
1715 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1716 | { | |
1717 | unsigned int sta; | |
1718 | ||
1719 | sta = get_slot_status(slot); | |
1720 | ||
1721 | return (sta & ACPI_STA_SHOW_IN_UI) ? 1 : 0; | |
1722 | } | |
1723 | ||
1724 | ||
1725 | /* | |
1726 | * adapter presence : 1 | |
1727 | * absence : 0 | |
1728 | */ | |
1729 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1730 | { | |
1731 | unsigned int sta; | |
1732 | ||
1733 | sta = get_slot_status(slot); | |
1734 | ||
1735 | return (sta == 0) ? 0 : 1; | |
1736 | } | |
1737 | ||
1738 | ||
1739 | /* | |
1740 | * pci address (seg/bus/dev) | |
1741 | */ | |
1742 | u32 acpiphp_get_address(struct acpiphp_slot *slot) | |
1743 | { | |
1744 | u32 address; | |
42f49a6a | 1745 | struct pci_bus *pci_bus = slot->bridge->pci_bus; |
1da177e4 | 1746 | |
42f49a6a RS |
1747 | address = (pci_domain_nr(pci_bus) << 16) | |
1748 | (pci_bus->number << 8) | | |
1da177e4 LT |
1749 | slot->device; |
1750 | ||
1751 | return address; | |
1752 | } |