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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 | * | |
998be20f | 29 | * Send feedback to <kristen.c.accardi@intel.com> |
1da177e4 LT |
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> | |
7a54f25c | 48 | #include <linux/pci_hotplug.h> |
6aa4cdd0 | 49 | #include <linux/mutex.h> |
1da177e4 LT |
50 | |
51 | #include "../pci.h" | |
1da177e4 LT |
52 | #include "acpiphp.h" |
53 | ||
54 | static LIST_HEAD(bridge_list); | |
600812ec ST |
55 | static LIST_HEAD(ioapic_list); |
56 | static DEFINE_SPINLOCK(ioapic_list_lock); | |
1da177e4 LT |
57 | |
58 | #define MY_NAME "acpiphp_glue" | |
59 | ||
60 | static void handle_hotplug_event_bridge (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); | |
2b85e130 | 63 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context); |
8e5dce35 | 64 | |
1da177e4 LT |
65 | |
66 | /* | |
67 | * initialization & terminatation routines | |
68 | */ | |
69 | ||
70 | /** | |
71 | * is_ejectable - determine if a slot is ejectable | |
72 | * @handle: handle to acpi namespace | |
73 | * | |
74 | * Ejectable slot should satisfy at least these conditions: | |
75 | * | |
76 | * 1. has _ADR method | |
77 | * 2. has _EJ0 method | |
78 | * | |
79 | * optionally | |
80 | * | |
81 | * 1. has _STA method | |
82 | * 2. has _PS0 method | |
83 | * 3. has _PS3 method | |
84 | * 4. .. | |
1da177e4 LT |
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 | ||
5a340ed8 | 105 | /* callback routine to check for the existence of ejectable slots */ |
1da177e4 LT |
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 | ||
5a340ed8 | 120 | /* callback routine to check for the existence of a pci dock device */ |
4e8662bb KA |
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 | 221 | status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); |
95b38b3f KA |
222 | if (ACPI_FAILURE(status)) { |
223 | /* | |
224 | * use the count of the number of slots we've found | |
225 | * for the number of the slot | |
226 | */ | |
227 | sun = bridge->nr_slots+1; | |
228 | } | |
1da177e4 LT |
229 | |
230 | /* search for objects that share the same slot */ | |
231 | for (slot = bridge->slots; slot; slot = slot->next) | |
232 | if (slot->device == device) { | |
233 | if (slot->sun != sun) | |
234 | warn("sibling found, but _SUN doesn't match!\n"); | |
235 | break; | |
236 | } | |
237 | ||
238 | if (!slot) { | |
f5afe806 | 239 | slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); |
1da177e4 LT |
240 | if (!slot) { |
241 | kfree(newfunc); | |
242 | return AE_NO_MEMORY; | |
243 | } | |
244 | ||
1da177e4 | 245 | slot->bridge = bridge; |
1da177e4 LT |
246 | slot->device = device; |
247 | slot->sun = sun; | |
248 | INIT_LIST_HEAD(&slot->funcs); | |
6aa4cdd0 | 249 | mutex_init(&slot->crit_sect); |
1da177e4 LT |
250 | |
251 | slot->next = bridge->slots; | |
252 | bridge->slots = slot; | |
253 | ||
254 | bridge->nr_slots++; | |
255 | ||
42f49a6a RS |
256 | dbg("found ACPI PCI Hotplug slot %d at PCI %04x:%02x:%02x\n", |
257 | slot->sun, pci_domain_nr(bridge->pci_bus), | |
258 | bridge->pci_bus->number, slot->device); | |
e27da381 MT |
259 | retval = acpiphp_register_hotplug_slot(slot); |
260 | if (retval) { | |
f46753c5 AC |
261 | if (retval == -EBUSY) |
262 | warn("Slot %d already registered by another " | |
263 | "hotplug driver\n", slot->sun); | |
264 | else | |
265 | warn("acpiphp_register_hotplug_slot failed " | |
266 | "(err code = 0x%x)\n", retval); | |
e27da381 MT |
267 | goto err_exit; |
268 | } | |
1da177e4 LT |
269 | } |
270 | ||
271 | newfunc->slot = slot; | |
272 | list_add_tail(&newfunc->sibling, &slot->funcs); | |
273 | ||
274 | /* associate corresponding pci_dev */ | |
42f49a6a | 275 | newfunc->pci_dev = pci_get_slot(bridge->pci_bus, |
1da177e4 LT |
276 | PCI_DEVFN(device, function)); |
277 | if (newfunc->pci_dev) { | |
1da177e4 LT |
278 | slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); |
279 | } | |
280 | ||
4e8662bb KA |
281 | if (is_dock_device(handle)) { |
282 | /* we don't want to call this device's _EJ0 | |
283 | * because we want the dock notify handler | |
284 | * to call it after it calls _DCK | |
20416ea5 KA |
285 | */ |
286 | newfunc->flags &= ~FUNC_HAS_EJ0; | |
4e8662bb KA |
287 | if (register_hotplug_dock_device(handle, |
288 | handle_hotplug_event_func, newfunc)) | |
289 | dbg("failed to register dock device\n"); | |
290 | ||
291 | /* we need to be notified when dock events happen | |
292 | * outside of the hotplug operation, since we may | |
293 | * need to do fixups before we can hotplug. | |
294 | */ | |
295 | newfunc->nb.notifier_call = post_dock_fixups; | |
296 | if (register_dock_notifier(&newfunc->nb)) | |
297 | dbg("failed to register a dock notifier"); | |
20416ea5 KA |
298 | } |
299 | ||
1da177e4 | 300 | /* install notify handler */ |
20416ea5 KA |
301 | if (!(newfunc->flags & FUNC_HAS_DCK)) { |
302 | status = acpi_install_notify_handler(handle, | |
1da177e4 LT |
303 | ACPI_SYSTEM_NOTIFY, |
304 | handle_hotplug_event_func, | |
305 | newfunc); | |
306 | ||
20416ea5 KA |
307 | if (ACPI_FAILURE(status)) |
308 | err("failed to register interrupt notify handler\n"); | |
309 | } else | |
310 | status = AE_OK; | |
1da177e4 | 311 | |
20416ea5 | 312 | return status; |
e27da381 MT |
313 | |
314 | err_exit: | |
315 | bridge->nr_slots--; | |
316 | bridge->slots = slot->next; | |
317 | kfree(slot); | |
318 | kfree(newfunc); | |
319 | ||
320 | return AE_OK; | |
1da177e4 LT |
321 | } |
322 | ||
323 | ||
324 | /* see if it's worth looking at this bridge */ | |
325 | static int detect_ejectable_slots(acpi_handle *bridge_handle) | |
326 | { | |
327 | acpi_status status; | |
328 | int count; | |
329 | ||
330 | count = 0; | |
331 | ||
332 | /* only check slots defined directly below bridge object */ | |
333 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1, | |
334 | is_ejectable_slot, (void *)&count, NULL); | |
335 | ||
4e8662bb KA |
336 | /* |
337 | * we also need to add this bridge if there is a dock bridge or | |
338 | * other pci device on a dock station (removable) | |
339 | */ | |
340 | if (!count) | |
341 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, | |
342 | (u32)1, is_pci_dock_device, (void *)&count, | |
343 | NULL); | |
344 | ||
1da177e4 LT |
345 | return count; |
346 | } | |
347 | ||
348 | ||
1da177e4 LT |
349 | /* decode ACPI 2.0 _HPP hot plug parameters */ |
350 | static void decode_hpp(struct acpiphp_bridge *bridge) | |
351 | { | |
352 | acpi_status status; | |
1da177e4 | 353 | |
7430e34c | 354 | status = acpi_get_hp_params_from_firmware(bridge->pci_bus, &bridge->hpp); |
e22b7350 KK |
355 | if (ACPI_FAILURE(status) || |
356 | !bridge->hpp.t0 || (bridge->hpp.t0->revision > 1)) { | |
783c49fc | 357 | /* use default numbers */ |
e22b7350 KK |
358 | printk(KERN_WARNING |
359 | "%s: Could not get hotplug parameters. Use defaults\n", | |
66bef8c0 | 360 | __func__); |
e22b7350 KK |
361 | bridge->hpp.t0 = &bridge->hpp.type0_data; |
362 | bridge->hpp.t0->revision = 0; | |
363 | bridge->hpp.t0->cache_line_size = 0x10; | |
364 | bridge->hpp.t0->latency_timer = 0x40; | |
365 | bridge->hpp.t0->enable_serr = 0; | |
366 | bridge->hpp.t0->enable_perr = 0; | |
1da177e4 | 367 | } |
1da177e4 LT |
368 | } |
369 | ||
370 | ||
783c49fc | 371 | |
1da177e4 LT |
372 | /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */ |
373 | static void init_bridge_misc(struct acpiphp_bridge *bridge) | |
374 | { | |
375 | acpi_status status; | |
376 | ||
377 | /* decode ACPI 2.0 _HPP (hot plug parameters) */ | |
378 | decode_hpp(bridge); | |
379 | ||
e27da381 MT |
380 | /* must be added to the list prior to calling register_slot */ |
381 | list_add(&bridge->list, &bridge_list); | |
382 | ||
1da177e4 LT |
383 | /* register all slot objects under this bridge */ |
384 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1, | |
385 | register_slot, bridge, NULL); | |
e27da381 MT |
386 | if (ACPI_FAILURE(status)) { |
387 | list_del(&bridge->list); | |
388 | return; | |
389 | } | |
1da177e4 LT |
390 | |
391 | /* install notify handler */ | |
8e7561cf | 392 | if (bridge->type != BRIDGE_TYPE_HOST) { |
551bcb75 MT |
393 | if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) { |
394 | status = acpi_remove_notify_handler(bridge->func->handle, | |
395 | ACPI_SYSTEM_NOTIFY, | |
396 | handle_hotplug_event_func); | |
397 | if (ACPI_FAILURE(status)) | |
398 | err("failed to remove notify handler\n"); | |
399 | } | |
8e7561cf | 400 | status = acpi_install_notify_handler(bridge->handle, |
1da177e4 LT |
401 | ACPI_SYSTEM_NOTIFY, |
402 | handle_hotplug_event_bridge, | |
403 | bridge); | |
404 | ||
8e7561cf RS |
405 | if (ACPI_FAILURE(status)) { |
406 | err("failed to register interrupt notify handler\n"); | |
407 | } | |
1da177e4 | 408 | } |
1da177e4 LT |
409 | } |
410 | ||
411 | ||
551bcb75 MT |
412 | /* find acpiphp_func from acpiphp_bridge */ |
413 | static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle) | |
414 | { | |
415 | struct list_head *node, *l; | |
416 | struct acpiphp_bridge *bridge; | |
417 | struct acpiphp_slot *slot; | |
418 | struct acpiphp_func *func; | |
419 | ||
420 | list_for_each(node, &bridge_list) { | |
421 | bridge = list_entry(node, struct acpiphp_bridge, list); | |
422 | for (slot = bridge->slots; slot; slot = slot->next) { | |
423 | list_for_each(l, &slot->funcs) { | |
424 | func = list_entry(l, struct acpiphp_func, | |
425 | sibling); | |
426 | if (func->handle == handle) | |
427 | return func; | |
428 | } | |
429 | } | |
430 | } | |
431 | ||
432 | return NULL; | |
433 | } | |
434 | ||
435 | ||
436 | static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge) | |
437 | { | |
438 | acpi_handle dummy_handle; | |
439 | ||
440 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
441 | "_STA", &dummy_handle))) | |
442 | bridge->flags |= BRIDGE_HAS_STA; | |
443 | ||
444 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
445 | "_EJ0", &dummy_handle))) | |
446 | bridge->flags |= BRIDGE_HAS_EJ0; | |
447 | ||
448 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
449 | "_PS0", &dummy_handle))) | |
450 | bridge->flags |= BRIDGE_HAS_PS0; | |
451 | ||
452 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
453 | "_PS3", &dummy_handle))) | |
454 | bridge->flags |= BRIDGE_HAS_PS3; | |
455 | ||
456 | /* is this ejectable p2p bridge? */ | |
457 | if (bridge->flags & BRIDGE_HAS_EJ0) { | |
458 | struct acpiphp_func *func; | |
459 | ||
460 | dbg("found ejectable p2p bridge\n"); | |
461 | ||
462 | /* make link between PCI bridge and PCI function */ | |
463 | func = acpiphp_bridge_handle_to_function(bridge->handle); | |
464 | if (!func) | |
465 | return; | |
466 | bridge->func = func; | |
467 | func->bridge = bridge; | |
468 | } | |
469 | } | |
470 | ||
471 | ||
1da177e4 | 472 | /* allocate and initialize host bridge data structure */ |
42f49a6a | 473 | static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus) |
1da177e4 | 474 | { |
1da177e4 LT |
475 | struct acpiphp_bridge *bridge; |
476 | ||
f5afe806 | 477 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
478 | if (bridge == NULL) |
479 | return; | |
480 | ||
1da177e4 LT |
481 | bridge->type = BRIDGE_TYPE_HOST; |
482 | bridge->handle = handle; | |
1da177e4 | 483 | |
42f49a6a | 484 | bridge->pci_bus = pci_bus; |
1da177e4 LT |
485 | |
486 | spin_lock_init(&bridge->res_lock); | |
487 | ||
1da177e4 LT |
488 | init_bridge_misc(bridge); |
489 | } | |
490 | ||
491 | ||
492 | /* allocate and initialize PCI-to-PCI bridge data structure */ | |
42f49a6a | 493 | static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev) |
1da177e4 LT |
494 | { |
495 | struct acpiphp_bridge *bridge; | |
1da177e4 | 496 | |
f5afe806 | 497 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
498 | if (bridge == NULL) { |
499 | err("out of memory\n"); | |
500 | return; | |
501 | } | |
502 | ||
1da177e4 LT |
503 | bridge->type = BRIDGE_TYPE_P2P; |
504 | bridge->handle = handle; | |
551bcb75 | 505 | config_p2p_bridge_flags(bridge); |
1da177e4 | 506 | |
42f49a6a RS |
507 | bridge->pci_dev = pci_dev_get(pci_dev); |
508 | bridge->pci_bus = pci_dev->subordinate; | |
1da177e4 LT |
509 | if (!bridge->pci_bus) { |
510 | err("This is not a PCI-to-PCI bridge!\n"); | |
42f49a6a | 511 | goto err; |
1da177e4 LT |
512 | } |
513 | ||
514 | spin_lock_init(&bridge->res_lock); | |
515 | ||
1da177e4 | 516 | init_bridge_misc(bridge); |
42f49a6a RS |
517 | return; |
518 | err: | |
519 | pci_dev_put(pci_dev); | |
520 | kfree(bridge); | |
521 | return; | |
1da177e4 LT |
522 | } |
523 | ||
524 | ||
525 | /* callback routine to find P2P bridges */ | |
526 | static acpi_status | |
527 | find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
528 | { | |
529 | acpi_status status; | |
530 | acpi_handle dummy_handle; | |
1da177e4 | 531 | unsigned long tmp; |
42f49a6a | 532 | int device, function; |
1da177e4 | 533 | struct pci_dev *dev; |
42f49a6a | 534 | struct pci_bus *pci_bus = context; |
1da177e4 LT |
535 | |
536 | status = acpi_get_handle(handle, "_ADR", &dummy_handle); | |
537 | if (ACPI_FAILURE(status)) | |
538 | return AE_OK; /* continue */ | |
539 | ||
540 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp); | |
541 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 542 | dbg("%s: _ADR evaluation failure\n", __func__); |
1da177e4 LT |
543 | return AE_OK; |
544 | } | |
545 | ||
546 | device = (tmp >> 16) & 0xffff; | |
547 | function = tmp & 0xffff; | |
548 | ||
42f49a6a | 549 | dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function)); |
1da177e4 | 550 | |
42f49a6a RS |
551 | if (!dev || !dev->subordinate) |
552 | goto out; | |
1da177e4 LT |
553 | |
554 | /* check if this bridge has ejectable slots */ | |
4e8662bb | 555 | if ((detect_ejectable_slots(handle) > 0)) { |
1da177e4 | 556 | dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); |
42f49a6a | 557 | add_p2p_bridge(handle, dev); |
1da177e4 LT |
558 | } |
559 | ||
7c8f25da KK |
560 | /* search P2P bridges under this p2p bridge */ |
561 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
562 | find_p2p_bridge, dev->subordinate, NULL); | |
563 | if (ACPI_FAILURE(status)) | |
551bcb75 | 564 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
7c8f25da | 565 | |
42f49a6a RS |
566 | out: |
567 | pci_dev_put(dev); | |
1da177e4 LT |
568 | return AE_OK; |
569 | } | |
570 | ||
571 | ||
572 | /* find hot-pluggable slots, and then find P2P bridge */ | |
573 | static int add_bridge(acpi_handle handle) | |
574 | { | |
575 | acpi_status status; | |
576 | unsigned long tmp; | |
577 | int seg, bus; | |
578 | acpi_handle dummy_handle; | |
42f49a6a | 579 | struct pci_bus *pci_bus; |
1da177e4 LT |
580 | |
581 | /* if the bridge doesn't have _STA, we assume it is always there */ | |
582 | status = acpi_get_handle(handle, "_STA", &dummy_handle); | |
583 | if (ACPI_SUCCESS(status)) { | |
584 | status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp); | |
585 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 586 | dbg("%s: _STA evaluation failure\n", __func__); |
1da177e4 LT |
587 | return 0; |
588 | } | |
589 | if ((tmp & ACPI_STA_FUNCTIONING) == 0) | |
590 | /* don't register this object */ | |
591 | return 0; | |
592 | } | |
593 | ||
594 | /* get PCI segment number */ | |
595 | status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp); | |
596 | ||
597 | seg = ACPI_SUCCESS(status) ? tmp : 0; | |
598 | ||
599 | /* get PCI bus number */ | |
600 | status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp); | |
601 | ||
602 | if (ACPI_SUCCESS(status)) { | |
603 | bus = tmp; | |
604 | } else { | |
605 | warn("can't get bus number, assuming 0\n"); | |
606 | bus = 0; | |
607 | } | |
608 | ||
42f49a6a RS |
609 | pci_bus = pci_find_bus(seg, bus); |
610 | if (!pci_bus) { | |
611 | err("Can't find bus %04x:%02x\n", seg, bus); | |
612 | return 0; | |
613 | } | |
614 | ||
1da177e4 LT |
615 | /* check if this bridge has ejectable slots */ |
616 | if (detect_ejectable_slots(handle) > 0) { | |
617 | dbg("found PCI host-bus bridge with hot-pluggable slots\n"); | |
42f49a6a | 618 | add_host_bridge(handle, pci_bus); |
1da177e4 LT |
619 | } |
620 | ||
1da177e4 LT |
621 | /* search P2P bridges under this host bridge */ |
622 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
42f49a6a | 623 | find_p2p_bridge, pci_bus, NULL); |
1da177e4 LT |
624 | |
625 | if (ACPI_FAILURE(status)) | |
551bcb75 | 626 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
1da177e4 LT |
627 | |
628 | return 0; | |
629 | } | |
630 | ||
42f49a6a RS |
631 | static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle) |
632 | { | |
633 | struct list_head *head; | |
634 | list_for_each(head, &bridge_list) { | |
635 | struct acpiphp_bridge *bridge = list_entry(head, | |
636 | struct acpiphp_bridge, list); | |
637 | if (bridge->handle == handle) | |
638 | return bridge; | |
639 | } | |
640 | ||
641 | return NULL; | |
642 | } | |
1da177e4 | 643 | |
364d5094 | 644 | static void cleanup_bridge(struct acpiphp_bridge *bridge) |
1da177e4 | 645 | { |
42f49a6a | 646 | struct list_head *list, *tmp; |
42f49a6a RS |
647 | struct acpiphp_slot *slot; |
648 | acpi_status status; | |
364d5094 | 649 | acpi_handle handle = bridge->handle; |
42f49a6a RS |
650 | |
651 | status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
652 | handle_hotplug_event_bridge); | |
653 | if (ACPI_FAILURE(status)) | |
654 | err("failed to remove notify handler\n"); | |
655 | ||
551bcb75 MT |
656 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
657 | ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) { | |
658 | status = acpi_install_notify_handler(bridge->func->handle, | |
659 | ACPI_SYSTEM_NOTIFY, | |
660 | handle_hotplug_event_func, | |
661 | bridge->func); | |
662 | if (ACPI_FAILURE(status)) | |
663 | err("failed to install interrupt notify handler\n"); | |
664 | } | |
665 | ||
42f49a6a RS |
666 | slot = bridge->slots; |
667 | while (slot) { | |
668 | struct acpiphp_slot *next = slot->next; | |
669 | list_for_each_safe (list, tmp, &slot->funcs) { | |
670 | struct acpiphp_func *func; | |
671 | func = list_entry(list, struct acpiphp_func, sibling); | |
4e8662bb KA |
672 | if (is_dock_device(func->handle)) { |
673 | unregister_hotplug_dock_device(func->handle); | |
674 | unregister_dock_notifier(&func->nb); | |
675 | } | |
20416ea5 KA |
676 | if (!(func->flags & FUNC_HAS_DCK)) { |
677 | status = acpi_remove_notify_handler(func->handle, | |
42f49a6a RS |
678 | ACPI_SYSTEM_NOTIFY, |
679 | handle_hotplug_event_func); | |
20416ea5 KA |
680 | if (ACPI_FAILURE(status)) |
681 | err("failed to remove notify handler\n"); | |
682 | } | |
42f49a6a RS |
683 | pci_dev_put(func->pci_dev); |
684 | list_del(list); | |
685 | kfree(func); | |
686 | } | |
e27da381 MT |
687 | acpiphp_unregister_hotplug_slot(slot); |
688 | list_del(&slot->funcs); | |
42f49a6a RS |
689 | kfree(slot); |
690 | slot = next; | |
691 | } | |
692 | ||
693 | pci_dev_put(bridge->pci_dev); | |
694 | list_del(&bridge->list); | |
695 | kfree(bridge); | |
1da177e4 LT |
696 | } |
697 | ||
364d5094 RS |
698 | static acpi_status |
699 | cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
700 | { | |
701 | struct acpiphp_bridge *bridge; | |
702 | ||
551bcb75 MT |
703 | /* cleanup p2p bridges under this P2P bridge |
704 | in a depth-first manner */ | |
705 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
706 | cleanup_p2p_bridge, NULL, NULL); | |
707 | ||
364d5094 RS |
708 | if (!(bridge = acpiphp_handle_to_bridge(handle))) |
709 | return AE_OK; | |
710 | cleanup_bridge(bridge); | |
711 | return AE_OK; | |
712 | } | |
713 | ||
714 | static void remove_bridge(acpi_handle handle) | |
715 | { | |
716 | struct acpiphp_bridge *bridge; | |
717 | ||
551bcb75 MT |
718 | /* cleanup p2p bridges under this host bridge |
719 | in a depth-first manner */ | |
720 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
721 | (u32)1, cleanup_p2p_bridge, NULL, NULL); | |
722 | ||
364d5094 | 723 | bridge = acpiphp_handle_to_bridge(handle); |
551bcb75 | 724 | if (bridge) |
364d5094 | 725 | cleanup_bridge(bridge); |
364d5094 | 726 | } |
1da177e4 | 727 | |
a0d399a8 KK |
728 | static struct pci_dev * get_apic_pci_info(acpi_handle handle) |
729 | { | |
730 | struct acpi_pci_id id; | |
731 | struct pci_bus *bus; | |
732 | struct pci_dev *dev; | |
733 | ||
734 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &id))) | |
735 | return NULL; | |
736 | ||
737 | bus = pci_find_bus(id.segment, id.bus); | |
738 | if (!bus) | |
739 | return NULL; | |
740 | ||
741 | dev = pci_get_slot(bus, PCI_DEVFN(id.device, id.function)); | |
742 | if (!dev) | |
743 | return NULL; | |
744 | ||
745 | if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) && | |
746 | (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC)) | |
747 | { | |
748 | pci_dev_put(dev); | |
749 | return NULL; | |
750 | } | |
751 | ||
752 | return dev; | |
753 | } | |
754 | ||
755 | static int get_gsi_base(acpi_handle handle, u32 *gsi_base) | |
756 | { | |
757 | acpi_status status; | |
758 | int result = -1; | |
759 | unsigned long gsb; | |
760 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
761 | union acpi_object *obj; | |
762 | void *table; | |
763 | ||
764 | status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb); | |
765 | if (ACPI_SUCCESS(status)) { | |
766 | *gsi_base = (u32)gsb; | |
767 | return 0; | |
768 | } | |
769 | ||
770 | status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer); | |
771 | if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer) | |
772 | return -1; | |
773 | ||
774 | obj = buffer.pointer; | |
775 | if (obj->type != ACPI_TYPE_BUFFER) | |
776 | goto out; | |
777 | ||
778 | table = obj->buffer.pointer; | |
15a58ed1 AS |
779 | switch (((struct acpi_subtable_header *)table)->type) { |
780 | case ACPI_MADT_TYPE_IO_SAPIC: | |
781 | *gsi_base = ((struct acpi_madt_io_sapic *)table)->global_irq_base; | |
a0d399a8 KK |
782 | result = 0; |
783 | break; | |
15a58ed1 AS |
784 | case ACPI_MADT_TYPE_IO_APIC: |
785 | *gsi_base = ((struct acpi_madt_io_apic *)table)->global_irq_base; | |
a0d399a8 KK |
786 | result = 0; |
787 | break; | |
788 | default: | |
789 | break; | |
790 | } | |
791 | out: | |
81b26bca | 792 | kfree(buffer.pointer); |
a0d399a8 KK |
793 | return result; |
794 | } | |
795 | ||
796 | static acpi_status | |
797 | ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv) | |
798 | { | |
799 | acpi_status status; | |
800 | unsigned long sta; | |
801 | acpi_handle tmp; | |
802 | struct pci_dev *pdev; | |
803 | u32 gsi_base; | |
804 | u64 phys_addr; | |
600812ec | 805 | struct acpiphp_ioapic *ioapic; |
a0d399a8 KK |
806 | |
807 | /* Evaluate _STA if present */ | |
808 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
809 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
810 | return AE_CTRL_DEPTH; | |
811 | ||
812 | /* Scan only PCI bus scope */ | |
813 | status = acpi_get_handle(handle, "_HID", &tmp); | |
814 | if (ACPI_SUCCESS(status)) | |
815 | return AE_CTRL_DEPTH; | |
816 | ||
817 | if (get_gsi_base(handle, &gsi_base)) | |
818 | return AE_OK; | |
819 | ||
600812ec ST |
820 | ioapic = kmalloc(sizeof(*ioapic), GFP_KERNEL); |
821 | if (!ioapic) | |
822 | return AE_NO_MEMORY; | |
823 | ||
a0d399a8 KK |
824 | pdev = get_apic_pci_info(handle); |
825 | if (!pdev) | |
600812ec | 826 | goto exit_kfree; |
a0d399a8 | 827 | |
600812ec ST |
828 | if (pci_enable_device(pdev)) |
829 | goto exit_pci_dev_put; | |
a0d399a8 KK |
830 | |
831 | pci_set_master(pdev); | |
832 | ||
600812ec ST |
833 | if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)")) |
834 | goto exit_pci_disable_device; | |
a0d399a8 KK |
835 | |
836 | phys_addr = pci_resource_start(pdev, 0); | |
600812ec ST |
837 | if (acpi_register_ioapic(handle, phys_addr, gsi_base)) |
838 | goto exit_pci_release_region; | |
839 | ||
840 | ioapic->gsi_base = gsi_base; | |
841 | ioapic->dev = pdev; | |
842 | spin_lock(&ioapic_list_lock); | |
843 | list_add_tail(&ioapic->list, &ioapic_list); | |
844 | spin_unlock(&ioapic_list_lock); | |
845 | ||
846 | return AE_OK; | |
847 | ||
848 | exit_pci_release_region: | |
849 | pci_release_region(pdev, 0); | |
850 | exit_pci_disable_device: | |
851 | pci_disable_device(pdev); | |
852 | exit_pci_dev_put: | |
853 | pci_dev_put(pdev); | |
854 | exit_kfree: | |
855 | kfree(ioapic); | |
856 | ||
857 | return AE_OK; | |
858 | } | |
859 | ||
860 | static acpi_status | |
861 | ioapic_remove(acpi_handle handle, u32 lvl, void *context, void **rv) | |
862 | { | |
863 | acpi_status status; | |
864 | unsigned long sta; | |
865 | acpi_handle tmp; | |
866 | u32 gsi_base; | |
867 | struct acpiphp_ioapic *pos, *n, *ioapic = NULL; | |
868 | ||
869 | /* Evaluate _STA if present */ | |
870 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
871 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
872 | return AE_CTRL_DEPTH; | |
873 | ||
874 | /* Scan only PCI bus scope */ | |
875 | status = acpi_get_handle(handle, "_HID", &tmp); | |
876 | if (ACPI_SUCCESS(status)) | |
877 | return AE_CTRL_DEPTH; | |
878 | ||
879 | if (get_gsi_base(handle, &gsi_base)) | |
a0d399a8 | 880 | return AE_OK; |
600812ec ST |
881 | |
882 | acpi_unregister_ioapic(handle, gsi_base); | |
883 | ||
884 | spin_lock(&ioapic_list_lock); | |
885 | list_for_each_entry_safe(pos, n, &ioapic_list, list) { | |
886 | if (pos->gsi_base != gsi_base) | |
887 | continue; | |
888 | ioapic = pos; | |
889 | list_del(&ioapic->list); | |
890 | break; | |
a0d399a8 | 891 | } |
600812ec ST |
892 | spin_unlock(&ioapic_list_lock); |
893 | ||
894 | if (!ioapic) | |
895 | return AE_OK; | |
896 | ||
897 | pci_release_region(ioapic->dev, 0); | |
898 | pci_disable_device(ioapic->dev); | |
899 | pci_dev_put(ioapic->dev); | |
900 | kfree(ioapic); | |
a0d399a8 KK |
901 | |
902 | return AE_OK; | |
903 | } | |
904 | ||
905 | static int acpiphp_configure_ioapics(acpi_handle handle) | |
906 | { | |
9b1d19ee | 907 | ioapic_add(handle, 0, NULL, NULL); |
a0d399a8 KK |
908 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, |
909 | ACPI_UINT32_MAX, ioapic_add, NULL, NULL); | |
910 | return 0; | |
911 | } | |
912 | ||
600812ec ST |
913 | static int acpiphp_unconfigure_ioapics(acpi_handle handle) |
914 | { | |
915 | ioapic_remove(handle, 0, NULL, NULL); | |
916 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
917 | ACPI_UINT32_MAX, ioapic_remove, NULL, NULL); | |
918 | return 0; | |
919 | } | |
920 | ||
1da177e4 LT |
921 | static int power_on_slot(struct acpiphp_slot *slot) |
922 | { | |
923 | acpi_status status; | |
924 | struct acpiphp_func *func; | |
925 | struct list_head *l; | |
926 | int retval = 0; | |
927 | ||
928 | /* if already enabled, just skip */ | |
929 | if (slot->flags & SLOT_POWEREDON) | |
930 | goto err_exit; | |
931 | ||
932 | list_for_each (l, &slot->funcs) { | |
933 | func = list_entry(l, struct acpiphp_func, sibling); | |
934 | ||
935 | if (func->flags & FUNC_HAS_PS0) { | |
66bef8c0 | 936 | dbg("%s: executing _PS0\n", __func__); |
1da177e4 LT |
937 | status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); |
938 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 939 | warn("%s: _PS0 failed\n", __func__); |
1da177e4 LT |
940 | retval = -1; |
941 | goto err_exit; | |
942 | } else | |
943 | break; | |
944 | } | |
945 | } | |
946 | ||
947 | /* TBD: evaluate _STA to check if the slot is enabled */ | |
948 | ||
949 | slot->flags |= SLOT_POWEREDON; | |
950 | ||
951 | err_exit: | |
952 | return retval; | |
953 | } | |
954 | ||
955 | ||
956 | static int power_off_slot(struct acpiphp_slot *slot) | |
957 | { | |
958 | acpi_status status; | |
959 | struct acpiphp_func *func; | |
960 | struct list_head *l; | |
1da177e4 LT |
961 | |
962 | int retval = 0; | |
963 | ||
964 | /* if already disabled, just skip */ | |
965 | if ((slot->flags & SLOT_POWEREDON) == 0) | |
966 | goto err_exit; | |
967 | ||
968 | list_for_each (l, &slot->funcs) { | |
969 | func = list_entry(l, struct acpiphp_func, sibling); | |
970 | ||
2f523b15 | 971 | if (func->flags & FUNC_HAS_PS3) { |
1da177e4 LT |
972 | status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); |
973 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 974 | warn("%s: _PS3 failed\n", __func__); |
1da177e4 LT |
975 | retval = -1; |
976 | goto err_exit; | |
977 | } else | |
978 | break; | |
979 | } | |
980 | } | |
981 | ||
1da177e4 LT |
982 | /* TBD: evaluate _STA to check if the slot is disabled */ |
983 | ||
984 | slot->flags &= (~SLOT_POWEREDON); | |
985 | ||
986 | err_exit: | |
987 | return retval; | |
988 | } | |
989 | ||
990 | ||
15a1ae74 KA |
991 | |
992 | /** | |
26e6c66e | 993 | * acpiphp_max_busnr - return the highest reserved bus number under the given bus. |
15a1ae74 | 994 | * @bus: bus to start search with |
15a1ae74 KA |
995 | */ |
996 | static unsigned char acpiphp_max_busnr(struct pci_bus *bus) | |
997 | { | |
998 | struct list_head *tmp; | |
999 | unsigned char max, n; | |
1000 | ||
1001 | /* | |
1002 | * pci_bus_max_busnr will return the highest | |
1003 | * reserved busnr for all these children. | |
1004 | * that is equivalent to the bus->subordinate | |
1005 | * value. We don't want to use the parent's | |
1006 | * bus->subordinate value because it could have | |
1007 | * padding in it. | |
1008 | */ | |
1009 | max = bus->secondary; | |
1010 | ||
1011 | list_for_each(tmp, &bus->children) { | |
1012 | n = pci_bus_max_busnr(pci_bus_b(tmp)); | |
1013 | if (n > max) | |
1014 | max = n; | |
1015 | } | |
1016 | return max; | |
1017 | } | |
1018 | ||
1019 | ||
15a1ae74 KA |
1020 | /** |
1021 | * acpiphp_bus_add - add a new bus to acpi subsystem | |
1022 | * @func: acpiphp_func of the bridge | |
15a1ae74 KA |
1023 | */ |
1024 | static int acpiphp_bus_add(struct acpiphp_func *func) | |
1025 | { | |
1026 | acpi_handle phandle; | |
1027 | struct acpi_device *device, *pdevice; | |
1028 | int ret_val; | |
1029 | ||
1030 | acpi_get_parent(func->handle, &phandle); | |
1031 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1032 | dbg("no parent device, assuming NULL\n"); | |
1033 | pdevice = NULL; | |
1034 | } | |
20416ea5 KA |
1035 | if (!acpi_bus_get_device(func->handle, &device)) { |
1036 | dbg("bus exists... trim\n"); | |
1037 | /* this shouldn't be in here, so remove | |
1038 | * the bus then re-add it... | |
1039 | */ | |
1040 | ret_val = acpi_bus_trim(device, 1); | |
1041 | dbg("acpi_bus_trim return %x\n", ret_val); | |
1042 | } | |
1043 | ||
1044 | ret_val = acpi_bus_add(&device, pdevice, func->handle, | |
1045 | ACPI_BUS_TYPE_DEVICE); | |
1046 | if (ret_val) { | |
1047 | dbg("error adding bus, %x\n", | |
1048 | -ret_val); | |
1049 | goto acpiphp_bus_add_out; | |
15a1ae74 KA |
1050 | } |
1051 | /* | |
1052 | * try to start anyway. We could have failed to add | |
1053 | * simply because this bus had previously been added | |
1054 | * on another add. Don't bother with the return value | |
1055 | * we just keep going. | |
1056 | */ | |
1057 | ret_val = acpi_bus_start(device); | |
1058 | ||
1059 | acpiphp_bus_add_out: | |
1060 | return ret_val; | |
1061 | } | |
1062 | ||
1063 | ||
92c9be95 MT |
1064 | /** |
1065 | * acpiphp_bus_trim - trim a bus from acpi subsystem | |
1066 | * @handle: handle to acpi namespace | |
92c9be95 | 1067 | */ |
6d47a5e4 | 1068 | static int acpiphp_bus_trim(acpi_handle handle) |
92c9be95 MT |
1069 | { |
1070 | struct acpi_device *device; | |
1071 | int retval; | |
1072 | ||
1073 | retval = acpi_bus_get_device(handle, &device); | |
1074 | if (retval) { | |
1075 | dbg("acpi_device not found\n"); | |
1076 | return retval; | |
1077 | } | |
1078 | ||
1079 | retval = acpi_bus_trim(device, 1); | |
1080 | if (retval) | |
1081 | err("cannot remove from acpi list\n"); | |
1082 | ||
1083 | return retval; | |
1084 | } | |
15a1ae74 | 1085 | |
1da177e4 LT |
1086 | /** |
1087 | * enable_device - enable, configure a slot | |
1088 | * @slot: slot to be enabled | |
1089 | * | |
1090 | * This function should be called per *physical slot*, | |
1091 | * not per each slot object in ACPI namespace. | |
1da177e4 | 1092 | */ |
0ab2b57f | 1093 | static int __ref enable_device(struct acpiphp_slot *slot) |
1da177e4 | 1094 | { |
1da177e4 | 1095 | struct pci_dev *dev; |
42f49a6a | 1096 | struct pci_bus *bus = slot->bridge->pci_bus; |
1da177e4 LT |
1097 | struct list_head *l; |
1098 | struct acpiphp_func *func; | |
1099 | int retval = 0; | |
42f49a6a | 1100 | int num, max, pass; |
551bcb75 | 1101 | acpi_status status; |
1da177e4 LT |
1102 | |
1103 | if (slot->flags & SLOT_ENABLED) | |
1104 | goto err_exit; | |
1105 | ||
1106 | /* sanity check: dev should be NULL when hot-plugged in */ | |
42f49a6a | 1107 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0)); |
1da177e4 LT |
1108 | if (dev) { |
1109 | /* This case shouldn't happen */ | |
1110 | err("pci_dev structure already exists.\n"); | |
42f49a6a | 1111 | pci_dev_put(dev); |
1da177e4 LT |
1112 | retval = -1; |
1113 | goto err_exit; | |
1114 | } | |
1115 | ||
42f49a6a RS |
1116 | num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0)); |
1117 | if (num == 0) { | |
1da177e4 LT |
1118 | err("No new device found\n"); |
1119 | retval = -1; | |
1120 | goto err_exit; | |
1121 | } | |
1122 | ||
15a1ae74 | 1123 | max = acpiphp_max_busnr(bus); |
42f49a6a RS |
1124 | for (pass = 0; pass < 2; pass++) { |
1125 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1126 | if (PCI_SLOT(dev->devfn) != slot->device) | |
1127 | continue; | |
1128 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || | |
c64b5eea | 1129 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
42f49a6a | 1130 | max = pci_scan_bridge(bus, dev, max, pass); |
92c9be95 | 1131 | if (pass && dev->subordinate) |
c64b5eea KA |
1132 | pci_bus_size_bridges(dev->subordinate); |
1133 | } | |
42f49a6a | 1134 | } |
1da177e4 LT |
1135 | } |
1136 | ||
92c9be95 MT |
1137 | list_for_each (l, &slot->funcs) { |
1138 | func = list_entry(l, struct acpiphp_func, sibling); | |
1139 | acpiphp_bus_add(func); | |
1140 | } | |
1141 | ||
42f49a6a | 1142 | pci_bus_assign_resources(bus); |
8e5dce35 | 1143 | acpiphp_sanitize_bus(bus); |
287af2fb | 1144 | acpiphp_set_hpp_values(slot->bridge->handle, bus); |
9b1d19ee ST |
1145 | list_for_each_entry(func, &slot->funcs, sibling) |
1146 | acpiphp_configure_ioapics(func->handle); | |
8e5dce35 | 1147 | pci_enable_bridges(bus); |
42f49a6a RS |
1148 | pci_bus_add_devices(bus); |
1149 | ||
1da177e4 LT |
1150 | /* associate pci_dev to our representation */ |
1151 | list_for_each (l, &slot->funcs) { | |
1152 | func = list_entry(l, struct acpiphp_func, sibling); | |
42f49a6a | 1153 | func->pci_dev = pci_get_slot(bus, PCI_DEVFN(slot->device, |
1da177e4 | 1154 | func->function)); |
551bcb75 MT |
1155 | if (!func->pci_dev) |
1156 | continue; | |
1157 | ||
1158 | if (func->pci_dev->hdr_type != PCI_HEADER_TYPE_BRIDGE && | |
1159 | func->pci_dev->hdr_type != PCI_HEADER_TYPE_CARDBUS) | |
1160 | continue; | |
1161 | ||
1162 | status = find_p2p_bridge(func->handle, (u32)1, bus, NULL); | |
1163 | if (ACPI_FAILURE(status)) | |
1164 | warn("find_p2p_bridge failed (error code = 0x%x)\n", | |
1165 | status); | |
1da177e4 LT |
1166 | } |
1167 | ||
1168 | slot->flags |= SLOT_ENABLED; | |
1169 | ||
1da177e4 LT |
1170 | err_exit: |
1171 | return retval; | |
1172 | } | |
1173 | ||
d5cdb672 ST |
1174 | static void disable_bridges(struct pci_bus *bus) |
1175 | { | |
1176 | struct pci_dev *dev; | |
1177 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1178 | if (dev->subordinate) { | |
1179 | disable_bridges(dev->subordinate); | |
1180 | pci_disable_device(dev); | |
1181 | } | |
1182 | } | |
1183 | } | |
1da177e4 LT |
1184 | |
1185 | /** | |
1186 | * disable_device - disable a slot | |
26e6c66e | 1187 | * @slot: ACPI PHP slot |
1da177e4 LT |
1188 | */ |
1189 | static int disable_device(struct acpiphp_slot *slot) | |
1190 | { | |
1191 | int retval = 0; | |
1192 | struct acpiphp_func *func; | |
1193 | struct list_head *l; | |
1194 | ||
1195 | /* is this slot already disabled? */ | |
1196 | if (!(slot->flags & SLOT_ENABLED)) | |
1197 | goto err_exit; | |
1198 | ||
1199 | list_for_each (l, &slot->funcs) { | |
1200 | func = list_entry(l, struct acpiphp_func, sibling); | |
92c9be95 | 1201 | |
551bcb75 MT |
1202 | if (func->bridge) { |
1203 | /* cleanup p2p bridges under this P2P bridge */ | |
1204 | cleanup_p2p_bridge(func->bridge->handle, | |
1205 | (u32)1, NULL, NULL); | |
1206 | func->bridge = NULL; | |
1207 | } | |
1208 | ||
d5cdb672 | 1209 | if (func->pci_dev) { |
0dad3510 | 1210 | pci_stop_bus_device(func->pci_dev); |
d5cdb672 ST |
1211 | if (func->pci_dev->subordinate) { |
1212 | disable_bridges(func->pci_dev->subordinate); | |
1213 | pci_disable_device(func->pci_dev); | |
1214 | } | |
1215 | } | |
600812ec ST |
1216 | } |
1217 | ||
1218 | list_for_each (l, &slot->funcs) { | |
1219 | func = list_entry(l, struct acpiphp_func, sibling); | |
0dad3510 | 1220 | |
600812ec | 1221 | acpiphp_unconfigure_ioapics(func->handle); |
92c9be95 MT |
1222 | acpiphp_bus_trim(func->handle); |
1223 | /* try to remove anyway. | |
1224 | * acpiphp_bus_add might have been failed */ | |
1225 | ||
42f49a6a RS |
1226 | if (!func->pci_dev) |
1227 | continue; | |
1da177e4 | 1228 | |
42f49a6a RS |
1229 | pci_remove_bus_device(func->pci_dev); |
1230 | pci_dev_put(func->pci_dev); | |
1231 | func->pci_dev = NULL; | |
1da177e4 LT |
1232 | } |
1233 | ||
1234 | slot->flags &= (~SLOT_ENABLED); | |
1235 | ||
1236 | err_exit: | |
1237 | return retval; | |
1238 | } | |
1239 | ||
1240 | ||
1241 | /** | |
1242 | * get_slot_status - get ACPI slot status | |
26e6c66e | 1243 | * @slot: ACPI PHP slot |
1da177e4 | 1244 | * |
26e6c66e RD |
1245 | * If a slot has _STA for each function and if any one of them |
1246 | * returned non-zero status, return it. | |
1da177e4 | 1247 | * |
26e6c66e RD |
1248 | * If a slot doesn't have _STA and if any one of its functions' |
1249 | * configuration space is configured, return 0x0f as a _STA. | |
1da177e4 | 1250 | * |
26e6c66e | 1251 | * Otherwise return 0. |
1da177e4 LT |
1252 | */ |
1253 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
1254 | { | |
1255 | acpi_status status; | |
1256 | unsigned long sta = 0; | |
1257 | u32 dvid; | |
1258 | struct list_head *l; | |
1259 | struct acpiphp_func *func; | |
1260 | ||
1261 | list_for_each (l, &slot->funcs) { | |
1262 | func = list_entry(l, struct acpiphp_func, sibling); | |
1263 | ||
1264 | if (func->flags & FUNC_HAS_STA) { | |
1265 | status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); | |
1266 | if (ACPI_SUCCESS(status) && sta) | |
1267 | break; | |
1268 | } else { | |
1269 | pci_bus_read_config_dword(slot->bridge->pci_bus, | |
1270 | PCI_DEVFN(slot->device, | |
1271 | func->function), | |
1272 | PCI_VENDOR_ID, &dvid); | |
1273 | if (dvid != 0xffffffff) { | |
1274 | sta = ACPI_STA_ALL; | |
1275 | break; | |
1276 | } | |
1277 | } | |
1278 | } | |
1279 | ||
1280 | return (unsigned int)sta; | |
1281 | } | |
1282 | ||
8d50e332 RS |
1283 | /** |
1284 | * acpiphp_eject_slot - physically eject the slot | |
26e6c66e | 1285 | * @slot: ACPI PHP slot |
8d50e332 | 1286 | */ |
bfceafc5 | 1287 | int acpiphp_eject_slot(struct acpiphp_slot *slot) |
8d50e332 RS |
1288 | { |
1289 | acpi_status status; | |
1290 | struct acpiphp_func *func; | |
1291 | struct list_head *l; | |
1292 | struct acpi_object_list arg_list; | |
1293 | union acpi_object arg; | |
1294 | ||
1295 | list_for_each (l, &slot->funcs) { | |
1296 | func = list_entry(l, struct acpiphp_func, sibling); | |
1297 | ||
1298 | /* We don't want to call _EJ0 on non-existing functions. */ | |
1299 | if ((func->flags & FUNC_HAS_EJ0)) { | |
1300 | /* _EJ0 method take one argument */ | |
1301 | arg_list.count = 1; | |
1302 | arg_list.pointer = &arg; | |
1303 | arg.type = ACPI_TYPE_INTEGER; | |
1304 | arg.integer.value = 1; | |
1305 | ||
1306 | status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); | |
1307 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 1308 | warn("%s: _EJ0 failed\n", __func__); |
8d50e332 RS |
1309 | return -1; |
1310 | } else | |
1311 | break; | |
1312 | } | |
1313 | } | |
1314 | return 0; | |
1315 | } | |
1316 | ||
1da177e4 LT |
1317 | /** |
1318 | * acpiphp_check_bridge - re-enumerate devices | |
26e6c66e | 1319 | * @bridge: where to begin re-enumeration |
1da177e4 LT |
1320 | * |
1321 | * Iterate over all slots under this bridge and make sure that if a | |
1322 | * card is present they are enabled, and if not they are disabled. | |
1323 | */ | |
1324 | static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) | |
1325 | { | |
1326 | struct acpiphp_slot *slot; | |
1327 | int retval = 0; | |
1328 | int enabled, disabled; | |
1329 | ||
1330 | enabled = disabled = 0; | |
1331 | ||
1332 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1333 | unsigned int status = get_slot_status(slot); | |
1334 | if (slot->flags & SLOT_ENABLED) { | |
1335 | if (status == ACPI_STA_ALL) | |
1336 | continue; | |
1337 | retval = acpiphp_disable_slot(slot); | |
1338 | if (retval) { | |
1339 | err("Error occurred in disabling\n"); | |
1340 | goto err_exit; | |
8d50e332 RS |
1341 | } else { |
1342 | acpiphp_eject_slot(slot); | |
1da177e4 LT |
1343 | } |
1344 | disabled++; | |
1345 | } else { | |
1346 | if (status != ACPI_STA_ALL) | |
1347 | continue; | |
1348 | retval = acpiphp_enable_slot(slot); | |
1349 | if (retval) { | |
1350 | err("Error occurred in enabling\n"); | |
1351 | goto err_exit; | |
1352 | } | |
1353 | enabled++; | |
1354 | } | |
1355 | } | |
1356 | ||
66bef8c0 | 1357 | dbg("%s: %d enabled, %d disabled\n", __func__, enabled, disabled); |
1da177e4 LT |
1358 | |
1359 | err_exit: | |
1360 | return retval; | |
1361 | } | |
1362 | ||
8e7561cf RS |
1363 | static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge) |
1364 | { | |
1365 | u16 pci_cmd, pci_bctl; | |
1366 | struct pci_dev *cdev; | |
1367 | ||
1368 | /* Program hpp values for this device */ | |
1369 | if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL || | |
1370 | (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE && | |
1371 | (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI))) | |
1372 | return; | |
e22b7350 | 1373 | |
9ef2241b GH |
1374 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST) |
1375 | return; | |
1376 | ||
8e7561cf | 1377 | pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, |
e22b7350 | 1378 | bridge->hpp.t0->cache_line_size); |
8e7561cf | 1379 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, |
e22b7350 | 1380 | bridge->hpp.t0->latency_timer); |
8e7561cf | 1381 | pci_read_config_word(dev, PCI_COMMAND, &pci_cmd); |
e22b7350 | 1382 | if (bridge->hpp.t0->enable_serr) |
8e7561cf RS |
1383 | pci_cmd |= PCI_COMMAND_SERR; |
1384 | else | |
1385 | pci_cmd &= ~PCI_COMMAND_SERR; | |
e22b7350 | 1386 | if (bridge->hpp.t0->enable_perr) |
8e7561cf RS |
1387 | pci_cmd |= PCI_COMMAND_PARITY; |
1388 | else | |
1389 | pci_cmd &= ~PCI_COMMAND_PARITY; | |
1390 | pci_write_config_word(dev, PCI_COMMAND, pci_cmd); | |
1391 | ||
1392 | /* Program bridge control value and child devices */ | |
1393 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { | |
1394 | pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, | |
e22b7350 | 1395 | bridge->hpp.t0->latency_timer); |
8e7561cf | 1396 | pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl); |
e22b7350 | 1397 | if (bridge->hpp.t0->enable_serr) |
8e7561cf RS |
1398 | pci_bctl |= PCI_BRIDGE_CTL_SERR; |
1399 | else | |
1400 | pci_bctl &= ~PCI_BRIDGE_CTL_SERR; | |
e22b7350 | 1401 | if (bridge->hpp.t0->enable_perr) |
8e7561cf RS |
1402 | pci_bctl |= PCI_BRIDGE_CTL_PARITY; |
1403 | else | |
1404 | pci_bctl &= ~PCI_BRIDGE_CTL_PARITY; | |
1405 | pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl); | |
1406 | if (dev->subordinate) { | |
1407 | list_for_each_entry(cdev, &dev->subordinate->devices, | |
1408 | bus_list) | |
1409 | program_hpp(cdev, bridge); | |
1410 | } | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus) | |
1415 | { | |
1416 | struct acpiphp_bridge bridge; | |
1417 | struct pci_dev *dev; | |
1418 | ||
1419 | memset(&bridge, 0, sizeof(bridge)); | |
1420 | bridge.handle = handle; | |
7430e34c | 1421 | bridge.pci_bus = bus; |
783c49fc | 1422 | bridge.pci_dev = bus->self; |
8e7561cf RS |
1423 | decode_hpp(&bridge); |
1424 | list_for_each_entry(dev, &bus->devices, bus_list) | |
1425 | program_hpp(dev, &bridge); | |
1426 | ||
1427 | } | |
1428 | ||
1429 | /* | |
1430 | * Remove devices for which we could not assign resources, call | |
1431 | * arch specific code to fix-up the bus | |
1432 | */ | |
1433 | static void acpiphp_sanitize_bus(struct pci_bus *bus) | |
1434 | { | |
1435 | struct pci_dev *dev; | |
1436 | int i; | |
1437 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; | |
1438 | ||
1439 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1440 | for (i=0; i<PCI_BRIDGE_RESOURCES; i++) { | |
1441 | struct resource *res = &dev->resource[i]; | |
1442 | if ((res->flags & type_mask) && !res->start && | |
1443 | res->end) { | |
1444 | /* Could not assign a required resources | |
1445 | * for this device, remove it */ | |
1446 | pci_remove_bus_device(dev); | |
1447 | break; | |
1448 | } | |
1449 | } | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | /* Program resources in newly inserted bridge */ | |
1454 | static int acpiphp_configure_bridge (acpi_handle handle) | |
1455 | { | |
1456 | struct acpi_pci_id pci_id; | |
1457 | struct pci_bus *bus; | |
1458 | ||
1459 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &pci_id))) { | |
1460 | err("cannot get PCI domain and bus number for bridge\n"); | |
1461 | return -EINVAL; | |
1462 | } | |
1463 | bus = pci_find_bus(pci_id.segment, pci_id.bus); | |
1464 | if (!bus) { | |
1465 | err("cannot find bus %d:%d\n", | |
1466 | pci_id.segment, pci_id.bus); | |
1467 | return -EINVAL; | |
1468 | } | |
1469 | ||
1470 | pci_bus_size_bridges(bus); | |
1471 | pci_bus_assign_resources(bus); | |
1472 | acpiphp_sanitize_bus(bus); | |
1473 | acpiphp_set_hpp_values(handle, bus); | |
1474 | pci_enable_bridges(bus); | |
a0d399a8 | 1475 | acpiphp_configure_ioapics(handle); |
8e7561cf RS |
1476 | return 0; |
1477 | } | |
1478 | ||
1479 | static void handle_bridge_insertion(acpi_handle handle, u32 type) | |
1480 | { | |
1481 | struct acpi_device *device, *pdevice; | |
1482 | acpi_handle phandle; | |
1483 | ||
1484 | if ((type != ACPI_NOTIFY_BUS_CHECK) && | |
1485 | (type != ACPI_NOTIFY_DEVICE_CHECK)) { | |
1486 | err("unexpected notification type %d\n", type); | |
1487 | return; | |
1488 | } | |
1489 | ||
1490 | acpi_get_parent(handle, &phandle); | |
1491 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1492 | dbg("no parent device, assuming NULL\n"); | |
1493 | pdevice = NULL; | |
1494 | } | |
1495 | if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) { | |
1496 | err("cannot add bridge to acpi list\n"); | |
1497 | return; | |
1498 | } | |
1499 | if (!acpiphp_configure_bridge(handle) && | |
1500 | !acpi_bus_start(device)) | |
1501 | add_bridge(handle); | |
1502 | else | |
1503 | err("cannot configure and start bridge\n"); | |
1504 | ||
1505 | } | |
1506 | ||
1da177e4 LT |
1507 | /* |
1508 | * ACPI event handlers | |
1509 | */ | |
1510 | ||
0bbd6424 GH |
1511 | static acpi_status |
1512 | count_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1513 | { | |
1514 | int *count = (int *)context; | |
1515 | struct acpiphp_bridge *bridge; | |
1516 | ||
1517 | bridge = acpiphp_handle_to_bridge(handle); | |
1518 | if (bridge) | |
1519 | (*count)++; | |
1520 | return AE_OK ; | |
1521 | } | |
1522 | ||
1523 | static acpi_status | |
1524 | check_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1525 | { | |
1526 | struct acpiphp_bridge *bridge; | |
1527 | char objname[64]; | |
1528 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1529 | .pointer = objname }; | |
1530 | ||
1531 | bridge = acpiphp_handle_to_bridge(handle); | |
1532 | if (bridge) { | |
1533 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1534 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1535 | __func__, objname); |
0bbd6424 GH |
1536 | acpiphp_check_bridge(bridge); |
1537 | } | |
1538 | return AE_OK ; | |
1539 | } | |
1540 | ||
1da177e4 LT |
1541 | /** |
1542 | * handle_hotplug_event_bridge - handle ACPI event on bridges | |
1da177e4 LT |
1543 | * @handle: Notify()'ed acpi_handle |
1544 | * @type: Notify code | |
1545 | * @context: pointer to acpiphp_bridge structure | |
1546 | * | |
26e6c66e | 1547 | * Handles ACPI event notification on {host,p2p} bridges. |
1da177e4 LT |
1548 | */ |
1549 | static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context) | |
1550 | { | |
1551 | struct acpiphp_bridge *bridge; | |
1552 | char objname[64]; | |
1553 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1554 | .pointer = objname }; | |
8e7561cf | 1555 | struct acpi_device *device; |
0bbd6424 | 1556 | int num_sub_bridges = 0; |
1da177e4 | 1557 | |
8e7561cf RS |
1558 | if (acpi_bus_get_device(handle, &device)) { |
1559 | /* This bridge must have just been physically inserted */ | |
1560 | handle_bridge_insertion(handle, type); | |
1561 | return; | |
1562 | } | |
1563 | ||
1564 | bridge = acpiphp_handle_to_bridge(handle); | |
0bbd6424 GH |
1565 | if (type == ACPI_NOTIFY_BUS_CHECK) { |
1566 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, ACPI_UINT32_MAX, | |
1567 | count_sub_bridges, &num_sub_bridges, NULL); | |
1568 | } | |
1569 | ||
1570 | if (!bridge && !num_sub_bridges) { | |
8e7561cf RS |
1571 | err("cannot get bridge info\n"); |
1572 | return; | |
1573 | } | |
1da177e4 LT |
1574 | |
1575 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1576 | ||
1577 | switch (type) { | |
1578 | case ACPI_NOTIFY_BUS_CHECK: | |
1579 | /* bus re-enumerate */ | |
66bef8c0 | 1580 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
0bbd6424 GH |
1581 | if (bridge) { |
1582 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1583 | __func__, objname); |
0bbd6424 GH |
1584 | acpiphp_check_bridge(bridge); |
1585 | } | |
1586 | if (num_sub_bridges) | |
1587 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
1588 | ACPI_UINT32_MAX, check_sub_bridges, NULL, NULL); | |
1da177e4 LT |
1589 | break; |
1590 | ||
1591 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1592 | /* device check */ | |
66bef8c0 | 1593 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1594 | acpiphp_check_bridge(bridge); |
1595 | break; | |
1596 | ||
1597 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1598 | /* wake event */ | |
66bef8c0 | 1599 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1600 | break; |
1601 | ||
1602 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1603 | /* request device eject */ | |
66bef8c0 | 1604 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
551bcb75 MT |
1605 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
1606 | (bridge->flags & BRIDGE_HAS_EJ0)) { | |
1607 | struct acpiphp_slot *slot; | |
1608 | slot = bridge->func->slot; | |
1609 | if (!acpiphp_disable_slot(slot)) | |
1610 | acpiphp_eject_slot(slot); | |
1611 | } | |
1da177e4 LT |
1612 | break; |
1613 | ||
1614 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1615 | printk(KERN_ERR "Device %s cannot be configured due" | |
1616 | " to a frequency mismatch\n", objname); | |
1617 | break; | |
1618 | ||
1619 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1620 | printk(KERN_ERR "Device %s cannot be configured due" | |
1621 | " to a bus mode mismatch\n", objname); | |
1622 | break; | |
1623 | ||
1624 | case ACPI_NOTIFY_POWER_FAULT: | |
1625 | printk(KERN_ERR "Device %s has suffered a power fault\n", | |
1626 | objname); | |
1627 | break; | |
1628 | ||
1629 | default: | |
1630 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1631 | break; | |
1632 | } | |
1633 | } | |
1634 | ||
1da177e4 LT |
1635 | /** |
1636 | * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) | |
1da177e4 LT |
1637 | * @handle: Notify()'ed acpi_handle |
1638 | * @type: Notify code | |
1639 | * @context: pointer to acpiphp_func structure | |
1640 | * | |
26e6c66e | 1641 | * Handles ACPI event notification on slots. |
1da177e4 | 1642 | */ |
2b85e130 | 1643 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) |
1da177e4 LT |
1644 | { |
1645 | struct acpiphp_func *func; | |
1646 | char objname[64]; | |
1647 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1648 | .pointer = objname }; | |
1649 | ||
1650 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1651 | ||
1652 | func = (struct acpiphp_func *)context; | |
1653 | ||
1654 | switch (type) { | |
1655 | case ACPI_NOTIFY_BUS_CHECK: | |
1656 | /* bus re-enumerate */ | |
66bef8c0 | 1657 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
1da177e4 LT |
1658 | acpiphp_enable_slot(func->slot); |
1659 | break; | |
1660 | ||
1661 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1662 | /* device check : re-enumerate from parent bus */ | |
66bef8c0 | 1663 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1664 | acpiphp_check_bridge(func->slot->bridge); |
1665 | break; | |
1666 | ||
1667 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1668 | /* wake event */ | |
66bef8c0 | 1669 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1670 | break; |
1671 | ||
1672 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1673 | /* request device eject */ | |
66bef8c0 | 1674 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
8d50e332 RS |
1675 | if (!(acpiphp_disable_slot(func->slot))) |
1676 | acpiphp_eject_slot(func->slot); | |
1da177e4 LT |
1677 | break; |
1678 | ||
1679 | default: | |
1680 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1681 | break; | |
1682 | } | |
1683 | } | |
1684 | ||
8e7561cf RS |
1685 | |
1686 | static acpi_status | |
1687 | find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1688 | { | |
1689 | int *count = (int *)context; | |
1690 | ||
783c49fc | 1691 | if (acpi_root_bridge(handle)) { |
8e7561cf RS |
1692 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1693 | handle_hotplug_event_bridge, NULL); | |
1694 | (*count)++; | |
1695 | } | |
1696 | return AE_OK ; | |
1697 | } | |
1da177e4 LT |
1698 | |
1699 | static struct acpi_pci_driver acpi_pci_hp_driver = { | |
1700 | .add = add_bridge, | |
1701 | .remove = remove_bridge, | |
1702 | }; | |
1703 | ||
1704 | /** | |
1705 | * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures | |
1da177e4 LT |
1706 | */ |
1707 | int __init acpiphp_glue_init(void) | |
1708 | { | |
8e7561cf | 1709 | int num = 0; |
1da177e4 | 1710 | |
8e7561cf RS |
1711 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
1712 | ACPI_UINT32_MAX, find_root_bridges, &num, NULL); | |
1da177e4 LT |
1713 | |
1714 | if (num <= 0) | |
1715 | return -1; | |
8e7561cf RS |
1716 | else |
1717 | acpi_pci_register_driver(&acpi_pci_hp_driver); | |
1da177e4 LT |
1718 | |
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | ||
1723 | /** | |
1724 | * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures | |
1725 | * | |
26e6c66e | 1726 | * This function frees all data allocated in acpiphp_glue_init(). |
1da177e4 | 1727 | */ |
031f30d2 | 1728 | void acpiphp_glue_exit(void) |
1da177e4 | 1729 | { |
1da177e4 LT |
1730 | acpi_pci_unregister_driver(&acpi_pci_hp_driver); |
1731 | } | |
1732 | ||
1733 | ||
1734 | /** | |
1735 | * acpiphp_get_num_slots - count number of slots in a system | |
1736 | */ | |
1737 | int __init acpiphp_get_num_slots(void) | |
1738 | { | |
1da177e4 | 1739 | struct acpiphp_bridge *bridge; |
467c442f | 1740 | int num_slots = 0; |
1da177e4 | 1741 | |
467c442f | 1742 | list_for_each_entry (bridge, &bridge_list, list) { |
42f49a6a RS |
1743 | dbg("Bus %04x:%02x has %d slot%s\n", |
1744 | pci_domain_nr(bridge->pci_bus), | |
1745 | bridge->pci_bus->number, bridge->nr_slots, | |
1746 | bridge->nr_slots == 1 ? "" : "s"); | |
1da177e4 LT |
1747 | num_slots += bridge->nr_slots; |
1748 | } | |
1749 | ||
42f49a6a | 1750 | dbg("Total %d slots\n", num_slots); |
1da177e4 LT |
1751 | return num_slots; |
1752 | } | |
1753 | ||
1754 | ||
1755 | #if 0 | |
1756 | /** | |
1757 | * acpiphp_for_each_slot - call function for each slot | |
1758 | * @fn: callback function | |
1759 | * @data: context to be passed to callback function | |
1da177e4 LT |
1760 | */ |
1761 | static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) | |
1762 | { | |
1763 | struct list_head *node; | |
1764 | struct acpiphp_bridge *bridge; | |
1765 | struct acpiphp_slot *slot; | |
1766 | int retval = 0; | |
1767 | ||
1768 | list_for_each (node, &bridge_list) { | |
1769 | bridge = (struct acpiphp_bridge *)node; | |
1770 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1771 | retval = fn(slot, data); | |
1772 | if (!retval) | |
1773 | goto err_exit; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | err_exit: | |
1778 | return retval; | |
1779 | } | |
1780 | #endif | |
1781 | ||
1da177e4 LT |
1782 | |
1783 | /** | |
1784 | * acpiphp_enable_slot - power on slot | |
26e6c66e | 1785 | * @slot: ACPI PHP slot |
1da177e4 LT |
1786 | */ |
1787 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
1788 | { | |
1789 | int retval; | |
1790 | ||
6aa4cdd0 | 1791 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1792 | |
1793 | /* wake up all functions */ | |
1794 | retval = power_on_slot(slot); | |
1795 | if (retval) | |
1796 | goto err_exit; | |
1797 | ||
cde0e5d7 | 1798 | if (get_slot_status(slot) == ACPI_STA_ALL) { |
1da177e4 LT |
1799 | /* configure all functions */ |
1800 | retval = enable_device(slot); | |
cde0e5d7 MT |
1801 | if (retval) |
1802 | power_off_slot(slot); | |
1803 | } else { | |
66bef8c0 | 1804 | dbg("%s: Slot status is not ACPI_STA_ALL\n", __func__); |
cde0e5d7 MT |
1805 | power_off_slot(slot); |
1806 | } | |
1da177e4 LT |
1807 | |
1808 | err_exit: | |
6aa4cdd0 | 1809 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1810 | return retval; |
1811 | } | |
1812 | ||
1da177e4 LT |
1813 | /** |
1814 | * acpiphp_disable_slot - power off slot | |
26e6c66e | 1815 | * @slot: ACPI PHP slot |
1da177e4 LT |
1816 | */ |
1817 | int acpiphp_disable_slot(struct acpiphp_slot *slot) | |
1818 | { | |
1819 | int retval = 0; | |
1820 | ||
6aa4cdd0 | 1821 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1822 | |
1823 | /* unconfigure all functions */ | |
1824 | retval = disable_device(slot); | |
1825 | if (retval) | |
1826 | goto err_exit; | |
1827 | ||
1828 | /* power off all functions */ | |
1829 | retval = power_off_slot(slot); | |
1830 | if (retval) | |
1831 | goto err_exit; | |
1832 | ||
1da177e4 | 1833 | err_exit: |
6aa4cdd0 | 1834 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1835 | return retval; |
1836 | } | |
1837 | ||
1838 | ||
1839 | /* | |
1840 | * slot enabled: 1 | |
1841 | * slot disabled: 0 | |
1842 | */ | |
1843 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
1844 | { | |
8d50e332 | 1845 | return (slot->flags & SLOT_POWEREDON); |
1da177e4 LT |
1846 | } |
1847 | ||
1848 | ||
1849 | /* | |
35ae61a0 MT |
1850 | * latch open: 1 |
1851 | * latch closed: 0 | |
1da177e4 LT |
1852 | */ |
1853 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1854 | { | |
1855 | unsigned int sta; | |
1856 | ||
1857 | sta = get_slot_status(slot); | |
1858 | ||
35ae61a0 | 1859 | return (sta & ACPI_STA_SHOW_IN_UI) ? 0 : 1; |
1da177e4 LT |
1860 | } |
1861 | ||
1862 | ||
1863 | /* | |
1864 | * adapter presence : 1 | |
1865 | * absence : 0 | |
1866 | */ | |
1867 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1868 | { | |
1869 | unsigned int sta; | |
1870 | ||
1871 | sta = get_slot_status(slot); | |
1872 | ||
1873 | return (sta == 0) ? 0 : 1; | |
1874 | } |