Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ACPI PCI HotPlug glue functions to ACPI CA subsystem | |
3 | * | |
4 | * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com) | |
5 | * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com) | |
6 | * Copyright (C) 2002,2003 NEC Corporation | |
42f49a6a RS |
7 | * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com) |
8 | * Copyright (C) 2003-2005 Hewlett Packard | |
8e7561cf RS |
9 | * Copyright (C) 2005 Rajesh Shah (rajesh.shah@intel.com) |
10 | * Copyright (C) 2005 Intel Corporation | |
1da177e4 LT |
11 | * |
12 | * All rights reserved. | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or (at | |
17 | * your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, but | |
20 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
22 | * NON INFRINGEMENT. See the GNU General Public License for more | |
23 | * details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
28 | * | |
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; | |
27663c58 | 183 | unsigned long 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; | |
27663c58 | 531 | unsigned long 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; | |
27663c58 | 576 | unsigned long long tmp; |
1da177e4 LT |
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 | ||
a13307ce AC |
708 | bridge = acpiphp_handle_to_bridge(handle); |
709 | if (bridge) | |
710 | cleanup_bridge(bridge); | |
711 | ||
364d5094 RS |
712 | return AE_OK; |
713 | } | |
714 | ||
715 | static void remove_bridge(acpi_handle handle) | |
716 | { | |
717 | struct acpiphp_bridge *bridge; | |
718 | ||
551bcb75 MT |
719 | /* cleanup p2p bridges under this host bridge |
720 | in a depth-first manner */ | |
721 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
722 | (u32)1, cleanup_p2p_bridge, NULL, NULL); | |
723 | ||
a13307ce AC |
724 | /* |
725 | * On root bridges with hotplug slots directly underneath (ie, | |
726 | * no p2p bridge inbetween), we call cleanup_bridge(). | |
727 | * | |
728 | * The else clause cleans up root bridges that either had no | |
729 | * hotplug slots at all, or had a p2p bridge underneath. | |
730 | */ | |
364d5094 | 731 | bridge = acpiphp_handle_to_bridge(handle); |
551bcb75 | 732 | if (bridge) |
364d5094 | 733 | cleanup_bridge(bridge); |
a13307ce AC |
734 | else |
735 | acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
736 | handle_hotplug_event_bridge); | |
364d5094 | 737 | } |
1da177e4 | 738 | |
a0d399a8 KK |
739 | static struct pci_dev * get_apic_pci_info(acpi_handle handle) |
740 | { | |
741 | struct acpi_pci_id id; | |
742 | struct pci_bus *bus; | |
743 | struct pci_dev *dev; | |
744 | ||
745 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &id))) | |
746 | return NULL; | |
747 | ||
748 | bus = pci_find_bus(id.segment, id.bus); | |
749 | if (!bus) | |
750 | return NULL; | |
751 | ||
752 | dev = pci_get_slot(bus, PCI_DEVFN(id.device, id.function)); | |
753 | if (!dev) | |
754 | return NULL; | |
755 | ||
756 | if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) && | |
757 | (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC)) | |
758 | { | |
759 | pci_dev_put(dev); | |
760 | return NULL; | |
761 | } | |
762 | ||
763 | return dev; | |
764 | } | |
765 | ||
766 | static int get_gsi_base(acpi_handle handle, u32 *gsi_base) | |
767 | { | |
768 | acpi_status status; | |
769 | int result = -1; | |
27663c58 | 770 | unsigned long long gsb; |
a0d399a8 KK |
771 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
772 | union acpi_object *obj; | |
773 | void *table; | |
774 | ||
775 | status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb); | |
776 | if (ACPI_SUCCESS(status)) { | |
777 | *gsi_base = (u32)gsb; | |
778 | return 0; | |
779 | } | |
780 | ||
781 | status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer); | |
782 | if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer) | |
783 | return -1; | |
784 | ||
785 | obj = buffer.pointer; | |
786 | if (obj->type != ACPI_TYPE_BUFFER) | |
787 | goto out; | |
788 | ||
789 | table = obj->buffer.pointer; | |
15a58ed1 AS |
790 | switch (((struct acpi_subtable_header *)table)->type) { |
791 | case ACPI_MADT_TYPE_IO_SAPIC: | |
792 | *gsi_base = ((struct acpi_madt_io_sapic *)table)->global_irq_base; | |
a0d399a8 KK |
793 | result = 0; |
794 | break; | |
15a58ed1 AS |
795 | case ACPI_MADT_TYPE_IO_APIC: |
796 | *gsi_base = ((struct acpi_madt_io_apic *)table)->global_irq_base; | |
a0d399a8 KK |
797 | result = 0; |
798 | break; | |
799 | default: | |
800 | break; | |
801 | } | |
802 | out: | |
81b26bca | 803 | kfree(buffer.pointer); |
a0d399a8 KK |
804 | return result; |
805 | } | |
806 | ||
807 | static acpi_status | |
808 | ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv) | |
809 | { | |
810 | acpi_status status; | |
27663c58 | 811 | unsigned long long sta; |
a0d399a8 KK |
812 | acpi_handle tmp; |
813 | struct pci_dev *pdev; | |
814 | u32 gsi_base; | |
815 | u64 phys_addr; | |
600812ec | 816 | struct acpiphp_ioapic *ioapic; |
a0d399a8 KK |
817 | |
818 | /* Evaluate _STA if present */ | |
819 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
820 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
821 | return AE_CTRL_DEPTH; | |
822 | ||
823 | /* Scan only PCI bus scope */ | |
824 | status = acpi_get_handle(handle, "_HID", &tmp); | |
825 | if (ACPI_SUCCESS(status)) | |
826 | return AE_CTRL_DEPTH; | |
827 | ||
828 | if (get_gsi_base(handle, &gsi_base)) | |
829 | return AE_OK; | |
830 | ||
600812ec ST |
831 | ioapic = kmalloc(sizeof(*ioapic), GFP_KERNEL); |
832 | if (!ioapic) | |
833 | return AE_NO_MEMORY; | |
834 | ||
a0d399a8 KK |
835 | pdev = get_apic_pci_info(handle); |
836 | if (!pdev) | |
600812ec | 837 | goto exit_kfree; |
a0d399a8 | 838 | |
600812ec ST |
839 | if (pci_enable_device(pdev)) |
840 | goto exit_pci_dev_put; | |
a0d399a8 KK |
841 | |
842 | pci_set_master(pdev); | |
843 | ||
600812ec ST |
844 | if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)")) |
845 | goto exit_pci_disable_device; | |
a0d399a8 KK |
846 | |
847 | phys_addr = pci_resource_start(pdev, 0); | |
600812ec ST |
848 | if (acpi_register_ioapic(handle, phys_addr, gsi_base)) |
849 | goto exit_pci_release_region; | |
850 | ||
851 | ioapic->gsi_base = gsi_base; | |
852 | ioapic->dev = pdev; | |
853 | spin_lock(&ioapic_list_lock); | |
854 | list_add_tail(&ioapic->list, &ioapic_list); | |
855 | spin_unlock(&ioapic_list_lock); | |
856 | ||
857 | return AE_OK; | |
858 | ||
859 | exit_pci_release_region: | |
860 | pci_release_region(pdev, 0); | |
861 | exit_pci_disable_device: | |
862 | pci_disable_device(pdev); | |
863 | exit_pci_dev_put: | |
864 | pci_dev_put(pdev); | |
865 | exit_kfree: | |
866 | kfree(ioapic); | |
867 | ||
868 | return AE_OK; | |
869 | } | |
870 | ||
871 | static acpi_status | |
872 | ioapic_remove(acpi_handle handle, u32 lvl, void *context, void **rv) | |
873 | { | |
874 | acpi_status status; | |
27663c58 | 875 | unsigned long long sta; |
600812ec ST |
876 | acpi_handle tmp; |
877 | u32 gsi_base; | |
878 | struct acpiphp_ioapic *pos, *n, *ioapic = NULL; | |
879 | ||
880 | /* Evaluate _STA if present */ | |
881 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
882 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
883 | return AE_CTRL_DEPTH; | |
884 | ||
885 | /* Scan only PCI bus scope */ | |
886 | status = acpi_get_handle(handle, "_HID", &tmp); | |
887 | if (ACPI_SUCCESS(status)) | |
888 | return AE_CTRL_DEPTH; | |
889 | ||
890 | if (get_gsi_base(handle, &gsi_base)) | |
a0d399a8 | 891 | return AE_OK; |
600812ec ST |
892 | |
893 | acpi_unregister_ioapic(handle, gsi_base); | |
894 | ||
895 | spin_lock(&ioapic_list_lock); | |
896 | list_for_each_entry_safe(pos, n, &ioapic_list, list) { | |
897 | if (pos->gsi_base != gsi_base) | |
898 | continue; | |
899 | ioapic = pos; | |
900 | list_del(&ioapic->list); | |
901 | break; | |
a0d399a8 | 902 | } |
600812ec ST |
903 | spin_unlock(&ioapic_list_lock); |
904 | ||
905 | if (!ioapic) | |
906 | return AE_OK; | |
907 | ||
908 | pci_release_region(ioapic->dev, 0); | |
909 | pci_disable_device(ioapic->dev); | |
910 | pci_dev_put(ioapic->dev); | |
911 | kfree(ioapic); | |
a0d399a8 KK |
912 | |
913 | return AE_OK; | |
914 | } | |
915 | ||
916 | static int acpiphp_configure_ioapics(acpi_handle handle) | |
917 | { | |
9b1d19ee | 918 | ioapic_add(handle, 0, NULL, NULL); |
a0d399a8 KK |
919 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, |
920 | ACPI_UINT32_MAX, ioapic_add, NULL, NULL); | |
921 | return 0; | |
922 | } | |
923 | ||
600812ec ST |
924 | static int acpiphp_unconfigure_ioapics(acpi_handle handle) |
925 | { | |
926 | ioapic_remove(handle, 0, NULL, NULL); | |
927 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
928 | ACPI_UINT32_MAX, ioapic_remove, NULL, NULL); | |
929 | return 0; | |
930 | } | |
931 | ||
1da177e4 LT |
932 | static int power_on_slot(struct acpiphp_slot *slot) |
933 | { | |
934 | acpi_status status; | |
935 | struct acpiphp_func *func; | |
936 | struct list_head *l; | |
937 | int retval = 0; | |
938 | ||
939 | /* if already enabled, just skip */ | |
940 | if (slot->flags & SLOT_POWEREDON) | |
941 | goto err_exit; | |
942 | ||
943 | list_for_each (l, &slot->funcs) { | |
944 | func = list_entry(l, struct acpiphp_func, sibling); | |
945 | ||
946 | if (func->flags & FUNC_HAS_PS0) { | |
66bef8c0 | 947 | dbg("%s: executing _PS0\n", __func__); |
1da177e4 LT |
948 | status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); |
949 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 950 | warn("%s: _PS0 failed\n", __func__); |
1da177e4 LT |
951 | retval = -1; |
952 | goto err_exit; | |
953 | } else | |
954 | break; | |
955 | } | |
956 | } | |
957 | ||
958 | /* TBD: evaluate _STA to check if the slot is enabled */ | |
959 | ||
960 | slot->flags |= SLOT_POWEREDON; | |
961 | ||
962 | err_exit: | |
963 | return retval; | |
964 | } | |
965 | ||
966 | ||
967 | static int power_off_slot(struct acpiphp_slot *slot) | |
968 | { | |
969 | acpi_status status; | |
970 | struct acpiphp_func *func; | |
971 | struct list_head *l; | |
1da177e4 LT |
972 | |
973 | int retval = 0; | |
974 | ||
975 | /* if already disabled, just skip */ | |
976 | if ((slot->flags & SLOT_POWEREDON) == 0) | |
977 | goto err_exit; | |
978 | ||
979 | list_for_each (l, &slot->funcs) { | |
980 | func = list_entry(l, struct acpiphp_func, sibling); | |
981 | ||
2f523b15 | 982 | if (func->flags & FUNC_HAS_PS3) { |
1da177e4 LT |
983 | status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); |
984 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 985 | warn("%s: _PS3 failed\n", __func__); |
1da177e4 LT |
986 | retval = -1; |
987 | goto err_exit; | |
988 | } else | |
989 | break; | |
990 | } | |
991 | } | |
992 | ||
1da177e4 LT |
993 | /* TBD: evaluate _STA to check if the slot is disabled */ |
994 | ||
995 | slot->flags &= (~SLOT_POWEREDON); | |
996 | ||
997 | err_exit: | |
998 | return retval; | |
999 | } | |
1000 | ||
1001 | ||
15a1ae74 KA |
1002 | |
1003 | /** | |
26e6c66e | 1004 | * acpiphp_max_busnr - return the highest reserved bus number under the given bus. |
15a1ae74 | 1005 | * @bus: bus to start search with |
15a1ae74 KA |
1006 | */ |
1007 | static unsigned char acpiphp_max_busnr(struct pci_bus *bus) | |
1008 | { | |
1009 | struct list_head *tmp; | |
1010 | unsigned char max, n; | |
1011 | ||
1012 | /* | |
1013 | * pci_bus_max_busnr will return the highest | |
1014 | * reserved busnr for all these children. | |
1015 | * that is equivalent to the bus->subordinate | |
1016 | * value. We don't want to use the parent's | |
1017 | * bus->subordinate value because it could have | |
1018 | * padding in it. | |
1019 | */ | |
1020 | max = bus->secondary; | |
1021 | ||
1022 | list_for_each(tmp, &bus->children) { | |
1023 | n = pci_bus_max_busnr(pci_bus_b(tmp)); | |
1024 | if (n > max) | |
1025 | max = n; | |
1026 | } | |
1027 | return max; | |
1028 | } | |
1029 | ||
1030 | ||
15a1ae74 KA |
1031 | /** |
1032 | * acpiphp_bus_add - add a new bus to acpi subsystem | |
1033 | * @func: acpiphp_func of the bridge | |
15a1ae74 KA |
1034 | */ |
1035 | static int acpiphp_bus_add(struct acpiphp_func *func) | |
1036 | { | |
1037 | acpi_handle phandle; | |
1038 | struct acpi_device *device, *pdevice; | |
1039 | int ret_val; | |
1040 | ||
1041 | acpi_get_parent(func->handle, &phandle); | |
1042 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1043 | dbg("no parent device, assuming NULL\n"); | |
1044 | pdevice = NULL; | |
1045 | } | |
20416ea5 KA |
1046 | if (!acpi_bus_get_device(func->handle, &device)) { |
1047 | dbg("bus exists... trim\n"); | |
1048 | /* this shouldn't be in here, so remove | |
1049 | * the bus then re-add it... | |
1050 | */ | |
1051 | ret_val = acpi_bus_trim(device, 1); | |
1052 | dbg("acpi_bus_trim return %x\n", ret_val); | |
1053 | } | |
1054 | ||
1055 | ret_val = acpi_bus_add(&device, pdevice, func->handle, | |
1056 | ACPI_BUS_TYPE_DEVICE); | |
1057 | if (ret_val) { | |
1058 | dbg("error adding bus, %x\n", | |
1059 | -ret_val); | |
1060 | goto acpiphp_bus_add_out; | |
15a1ae74 KA |
1061 | } |
1062 | /* | |
1063 | * try to start anyway. We could have failed to add | |
1064 | * simply because this bus had previously been added | |
1065 | * on another add. Don't bother with the return value | |
1066 | * we just keep going. | |
1067 | */ | |
1068 | ret_val = acpi_bus_start(device); | |
1069 | ||
1070 | acpiphp_bus_add_out: | |
1071 | return ret_val; | |
1072 | } | |
1073 | ||
1074 | ||
92c9be95 MT |
1075 | /** |
1076 | * acpiphp_bus_trim - trim a bus from acpi subsystem | |
1077 | * @handle: handle to acpi namespace | |
92c9be95 | 1078 | */ |
6d47a5e4 | 1079 | static int acpiphp_bus_trim(acpi_handle handle) |
92c9be95 MT |
1080 | { |
1081 | struct acpi_device *device; | |
1082 | int retval; | |
1083 | ||
1084 | retval = acpi_bus_get_device(handle, &device); | |
1085 | if (retval) { | |
1086 | dbg("acpi_device not found\n"); | |
1087 | return retval; | |
1088 | } | |
1089 | ||
1090 | retval = acpi_bus_trim(device, 1); | |
1091 | if (retval) | |
1092 | err("cannot remove from acpi list\n"); | |
1093 | ||
1094 | return retval; | |
1095 | } | |
15a1ae74 | 1096 | |
1da177e4 LT |
1097 | /** |
1098 | * enable_device - enable, configure a slot | |
1099 | * @slot: slot to be enabled | |
1100 | * | |
1101 | * This function should be called per *physical slot*, | |
1102 | * not per each slot object in ACPI namespace. | |
1da177e4 | 1103 | */ |
0ab2b57f | 1104 | static int __ref enable_device(struct acpiphp_slot *slot) |
1da177e4 | 1105 | { |
1da177e4 | 1106 | struct pci_dev *dev; |
42f49a6a | 1107 | struct pci_bus *bus = slot->bridge->pci_bus; |
1da177e4 LT |
1108 | struct list_head *l; |
1109 | struct acpiphp_func *func; | |
1110 | int retval = 0; | |
42f49a6a | 1111 | int num, max, pass; |
551bcb75 | 1112 | acpi_status status; |
1da177e4 LT |
1113 | |
1114 | if (slot->flags & SLOT_ENABLED) | |
1115 | goto err_exit; | |
1116 | ||
1117 | /* sanity check: dev should be NULL when hot-plugged in */ | |
42f49a6a | 1118 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0)); |
1da177e4 LT |
1119 | if (dev) { |
1120 | /* This case shouldn't happen */ | |
1121 | err("pci_dev structure already exists.\n"); | |
42f49a6a | 1122 | pci_dev_put(dev); |
1da177e4 LT |
1123 | retval = -1; |
1124 | goto err_exit; | |
1125 | } | |
1126 | ||
42f49a6a RS |
1127 | num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0)); |
1128 | if (num == 0) { | |
1da177e4 LT |
1129 | err("No new device found\n"); |
1130 | retval = -1; | |
1131 | goto err_exit; | |
1132 | } | |
1133 | ||
15a1ae74 | 1134 | max = acpiphp_max_busnr(bus); |
42f49a6a RS |
1135 | for (pass = 0; pass < 2; pass++) { |
1136 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1137 | if (PCI_SLOT(dev->devfn) != slot->device) | |
1138 | continue; | |
1139 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || | |
c64b5eea | 1140 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
42f49a6a | 1141 | max = pci_scan_bridge(bus, dev, max, pass); |
92c9be95 | 1142 | if (pass && dev->subordinate) |
c64b5eea KA |
1143 | pci_bus_size_bridges(dev->subordinate); |
1144 | } | |
42f49a6a | 1145 | } |
1da177e4 LT |
1146 | } |
1147 | ||
92c9be95 MT |
1148 | list_for_each (l, &slot->funcs) { |
1149 | func = list_entry(l, struct acpiphp_func, sibling); | |
1150 | acpiphp_bus_add(func); | |
1151 | } | |
1152 | ||
42f49a6a | 1153 | pci_bus_assign_resources(bus); |
8e5dce35 | 1154 | acpiphp_sanitize_bus(bus); |
287af2fb | 1155 | acpiphp_set_hpp_values(slot->bridge->handle, bus); |
9b1d19ee ST |
1156 | list_for_each_entry(func, &slot->funcs, sibling) |
1157 | acpiphp_configure_ioapics(func->handle); | |
8e5dce35 | 1158 | pci_enable_bridges(bus); |
42f49a6a RS |
1159 | pci_bus_add_devices(bus); |
1160 | ||
1da177e4 LT |
1161 | /* associate pci_dev to our representation */ |
1162 | list_for_each (l, &slot->funcs) { | |
1163 | func = list_entry(l, struct acpiphp_func, sibling); | |
42f49a6a | 1164 | func->pci_dev = pci_get_slot(bus, PCI_DEVFN(slot->device, |
1da177e4 | 1165 | func->function)); |
551bcb75 MT |
1166 | if (!func->pci_dev) |
1167 | continue; | |
1168 | ||
1169 | if (func->pci_dev->hdr_type != PCI_HEADER_TYPE_BRIDGE && | |
1170 | func->pci_dev->hdr_type != PCI_HEADER_TYPE_CARDBUS) | |
1171 | continue; | |
1172 | ||
1173 | status = find_p2p_bridge(func->handle, (u32)1, bus, NULL); | |
1174 | if (ACPI_FAILURE(status)) | |
1175 | warn("find_p2p_bridge failed (error code = 0x%x)\n", | |
1176 | status); | |
1da177e4 LT |
1177 | } |
1178 | ||
1179 | slot->flags |= SLOT_ENABLED; | |
1180 | ||
1da177e4 LT |
1181 | err_exit: |
1182 | return retval; | |
1183 | } | |
1184 | ||
d5cdb672 ST |
1185 | static void disable_bridges(struct pci_bus *bus) |
1186 | { | |
1187 | struct pci_dev *dev; | |
1188 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1189 | if (dev->subordinate) { | |
1190 | disable_bridges(dev->subordinate); | |
1191 | pci_disable_device(dev); | |
1192 | } | |
1193 | } | |
1194 | } | |
1da177e4 LT |
1195 | |
1196 | /** | |
1197 | * disable_device - disable a slot | |
26e6c66e | 1198 | * @slot: ACPI PHP slot |
1da177e4 LT |
1199 | */ |
1200 | static int disable_device(struct acpiphp_slot *slot) | |
1201 | { | |
1202 | int retval = 0; | |
1203 | struct acpiphp_func *func; | |
1204 | struct list_head *l; | |
1205 | ||
1206 | /* is this slot already disabled? */ | |
1207 | if (!(slot->flags & SLOT_ENABLED)) | |
1208 | goto err_exit; | |
1209 | ||
1210 | list_for_each (l, &slot->funcs) { | |
1211 | func = list_entry(l, struct acpiphp_func, sibling); | |
92c9be95 | 1212 | |
551bcb75 MT |
1213 | if (func->bridge) { |
1214 | /* cleanup p2p bridges under this P2P bridge */ | |
1215 | cleanup_p2p_bridge(func->bridge->handle, | |
1216 | (u32)1, NULL, NULL); | |
1217 | func->bridge = NULL; | |
1218 | } | |
1219 | ||
d5cdb672 | 1220 | if (func->pci_dev) { |
0dad3510 | 1221 | pci_stop_bus_device(func->pci_dev); |
d5cdb672 ST |
1222 | if (func->pci_dev->subordinate) { |
1223 | disable_bridges(func->pci_dev->subordinate); | |
1224 | pci_disable_device(func->pci_dev); | |
1225 | } | |
1226 | } | |
600812ec ST |
1227 | } |
1228 | ||
1229 | list_for_each (l, &slot->funcs) { | |
1230 | func = list_entry(l, struct acpiphp_func, sibling); | |
0dad3510 | 1231 | |
600812ec | 1232 | acpiphp_unconfigure_ioapics(func->handle); |
92c9be95 MT |
1233 | acpiphp_bus_trim(func->handle); |
1234 | /* try to remove anyway. | |
1235 | * acpiphp_bus_add might have been failed */ | |
1236 | ||
42f49a6a RS |
1237 | if (!func->pci_dev) |
1238 | continue; | |
1da177e4 | 1239 | |
42f49a6a RS |
1240 | pci_remove_bus_device(func->pci_dev); |
1241 | pci_dev_put(func->pci_dev); | |
1242 | func->pci_dev = NULL; | |
1da177e4 LT |
1243 | } |
1244 | ||
1245 | slot->flags &= (~SLOT_ENABLED); | |
1246 | ||
1247 | err_exit: | |
1248 | return retval; | |
1249 | } | |
1250 | ||
1251 | ||
1252 | /** | |
1253 | * get_slot_status - get ACPI slot status | |
26e6c66e | 1254 | * @slot: ACPI PHP slot |
1da177e4 | 1255 | * |
26e6c66e RD |
1256 | * If a slot has _STA for each function and if any one of them |
1257 | * returned non-zero status, return it. | |
1da177e4 | 1258 | * |
26e6c66e RD |
1259 | * If a slot doesn't have _STA and if any one of its functions' |
1260 | * configuration space is configured, return 0x0f as a _STA. | |
1da177e4 | 1261 | * |
26e6c66e | 1262 | * Otherwise return 0. |
1da177e4 LT |
1263 | */ |
1264 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
1265 | { | |
1266 | acpi_status status; | |
27663c58 | 1267 | unsigned long long sta = 0; |
1da177e4 LT |
1268 | u32 dvid; |
1269 | struct list_head *l; | |
1270 | struct acpiphp_func *func; | |
1271 | ||
1272 | list_for_each (l, &slot->funcs) { | |
1273 | func = list_entry(l, struct acpiphp_func, sibling); | |
1274 | ||
1275 | if (func->flags & FUNC_HAS_STA) { | |
1276 | status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); | |
1277 | if (ACPI_SUCCESS(status) && sta) | |
1278 | break; | |
1279 | } else { | |
1280 | pci_bus_read_config_dword(slot->bridge->pci_bus, | |
1281 | PCI_DEVFN(slot->device, | |
1282 | func->function), | |
1283 | PCI_VENDOR_ID, &dvid); | |
1284 | if (dvid != 0xffffffff) { | |
1285 | sta = ACPI_STA_ALL; | |
1286 | break; | |
1287 | } | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | return (unsigned int)sta; | |
1292 | } | |
1293 | ||
8d50e332 RS |
1294 | /** |
1295 | * acpiphp_eject_slot - physically eject the slot | |
26e6c66e | 1296 | * @slot: ACPI PHP slot |
8d50e332 | 1297 | */ |
bfceafc5 | 1298 | int acpiphp_eject_slot(struct acpiphp_slot *slot) |
8d50e332 RS |
1299 | { |
1300 | acpi_status status; | |
1301 | struct acpiphp_func *func; | |
1302 | struct list_head *l; | |
1303 | struct acpi_object_list arg_list; | |
1304 | union acpi_object arg; | |
1305 | ||
1306 | list_for_each (l, &slot->funcs) { | |
1307 | func = list_entry(l, struct acpiphp_func, sibling); | |
1308 | ||
1309 | /* We don't want to call _EJ0 on non-existing functions. */ | |
1310 | if ((func->flags & FUNC_HAS_EJ0)) { | |
1311 | /* _EJ0 method take one argument */ | |
1312 | arg_list.count = 1; | |
1313 | arg_list.pointer = &arg; | |
1314 | arg.type = ACPI_TYPE_INTEGER; | |
1315 | arg.integer.value = 1; | |
1316 | ||
1317 | status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); | |
1318 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 1319 | warn("%s: _EJ0 failed\n", __func__); |
8d50e332 RS |
1320 | return -1; |
1321 | } else | |
1322 | break; | |
1323 | } | |
1324 | } | |
1325 | return 0; | |
1326 | } | |
1327 | ||
1da177e4 LT |
1328 | /** |
1329 | * acpiphp_check_bridge - re-enumerate devices | |
26e6c66e | 1330 | * @bridge: where to begin re-enumeration |
1da177e4 LT |
1331 | * |
1332 | * Iterate over all slots under this bridge and make sure that if a | |
1333 | * card is present they are enabled, and if not they are disabled. | |
1334 | */ | |
1335 | static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) | |
1336 | { | |
1337 | struct acpiphp_slot *slot; | |
1338 | int retval = 0; | |
1339 | int enabled, disabled; | |
1340 | ||
1341 | enabled = disabled = 0; | |
1342 | ||
1343 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1344 | unsigned int status = get_slot_status(slot); | |
1345 | if (slot->flags & SLOT_ENABLED) { | |
1346 | if (status == ACPI_STA_ALL) | |
1347 | continue; | |
1348 | retval = acpiphp_disable_slot(slot); | |
1349 | if (retval) { | |
1350 | err("Error occurred in disabling\n"); | |
1351 | goto err_exit; | |
8d50e332 RS |
1352 | } else { |
1353 | acpiphp_eject_slot(slot); | |
1da177e4 LT |
1354 | } |
1355 | disabled++; | |
1356 | } else { | |
1357 | if (status != ACPI_STA_ALL) | |
1358 | continue; | |
1359 | retval = acpiphp_enable_slot(slot); | |
1360 | if (retval) { | |
1361 | err("Error occurred in enabling\n"); | |
1362 | goto err_exit; | |
1363 | } | |
1364 | enabled++; | |
1365 | } | |
1366 | } | |
1367 | ||
66bef8c0 | 1368 | dbg("%s: %d enabled, %d disabled\n", __func__, enabled, disabled); |
1da177e4 LT |
1369 | |
1370 | err_exit: | |
1371 | return retval; | |
1372 | } | |
1373 | ||
8e7561cf RS |
1374 | static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge) |
1375 | { | |
1376 | u16 pci_cmd, pci_bctl; | |
1377 | struct pci_dev *cdev; | |
1378 | ||
1379 | /* Program hpp values for this device */ | |
1380 | if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL || | |
1381 | (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE && | |
1382 | (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI))) | |
1383 | return; | |
e22b7350 | 1384 | |
9ef2241b GH |
1385 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST) |
1386 | return; | |
1387 | ||
8e7561cf | 1388 | pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, |
e22b7350 | 1389 | bridge->hpp.t0->cache_line_size); |
8e7561cf | 1390 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, |
e22b7350 | 1391 | bridge->hpp.t0->latency_timer); |
8e7561cf | 1392 | pci_read_config_word(dev, PCI_COMMAND, &pci_cmd); |
e22b7350 | 1393 | if (bridge->hpp.t0->enable_serr) |
8e7561cf RS |
1394 | pci_cmd |= PCI_COMMAND_SERR; |
1395 | else | |
1396 | pci_cmd &= ~PCI_COMMAND_SERR; | |
e22b7350 | 1397 | if (bridge->hpp.t0->enable_perr) |
8e7561cf RS |
1398 | pci_cmd |= PCI_COMMAND_PARITY; |
1399 | else | |
1400 | pci_cmd &= ~PCI_COMMAND_PARITY; | |
1401 | pci_write_config_word(dev, PCI_COMMAND, pci_cmd); | |
1402 | ||
1403 | /* Program bridge control value and child devices */ | |
1404 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { | |
1405 | pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, | |
e22b7350 | 1406 | bridge->hpp.t0->latency_timer); |
8e7561cf | 1407 | pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl); |
e22b7350 | 1408 | if (bridge->hpp.t0->enable_serr) |
8e7561cf RS |
1409 | pci_bctl |= PCI_BRIDGE_CTL_SERR; |
1410 | else | |
1411 | pci_bctl &= ~PCI_BRIDGE_CTL_SERR; | |
e22b7350 | 1412 | if (bridge->hpp.t0->enable_perr) |
8e7561cf RS |
1413 | pci_bctl |= PCI_BRIDGE_CTL_PARITY; |
1414 | else | |
1415 | pci_bctl &= ~PCI_BRIDGE_CTL_PARITY; | |
1416 | pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl); | |
1417 | if (dev->subordinate) { | |
1418 | list_for_each_entry(cdev, &dev->subordinate->devices, | |
1419 | bus_list) | |
1420 | program_hpp(cdev, bridge); | |
1421 | } | |
1422 | } | |
1423 | } | |
1424 | ||
1425 | static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus) | |
1426 | { | |
1427 | struct acpiphp_bridge bridge; | |
1428 | struct pci_dev *dev; | |
1429 | ||
1430 | memset(&bridge, 0, sizeof(bridge)); | |
1431 | bridge.handle = handle; | |
7430e34c | 1432 | bridge.pci_bus = bus; |
783c49fc | 1433 | bridge.pci_dev = bus->self; |
8e7561cf RS |
1434 | decode_hpp(&bridge); |
1435 | list_for_each_entry(dev, &bus->devices, bus_list) | |
1436 | program_hpp(dev, &bridge); | |
1437 | ||
1438 | } | |
1439 | ||
1440 | /* | |
1441 | * Remove devices for which we could not assign resources, call | |
1442 | * arch specific code to fix-up the bus | |
1443 | */ | |
1444 | static void acpiphp_sanitize_bus(struct pci_bus *bus) | |
1445 | { | |
1446 | struct pci_dev *dev; | |
1447 | int i; | |
1448 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; | |
1449 | ||
1450 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1451 | for (i=0; i<PCI_BRIDGE_RESOURCES; i++) { | |
1452 | struct resource *res = &dev->resource[i]; | |
1453 | if ((res->flags & type_mask) && !res->start && | |
1454 | res->end) { | |
1455 | /* Could not assign a required resources | |
1456 | * for this device, remove it */ | |
1457 | pci_remove_bus_device(dev); | |
1458 | break; | |
1459 | } | |
1460 | } | |
1461 | } | |
1462 | } | |
1463 | ||
1464 | /* Program resources in newly inserted bridge */ | |
1465 | static int acpiphp_configure_bridge (acpi_handle handle) | |
1466 | { | |
1467 | struct acpi_pci_id pci_id; | |
1468 | struct pci_bus *bus; | |
1469 | ||
1470 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &pci_id))) { | |
1471 | err("cannot get PCI domain and bus number for bridge\n"); | |
1472 | return -EINVAL; | |
1473 | } | |
1474 | bus = pci_find_bus(pci_id.segment, pci_id.bus); | |
1475 | if (!bus) { | |
1476 | err("cannot find bus %d:%d\n", | |
1477 | pci_id.segment, pci_id.bus); | |
1478 | return -EINVAL; | |
1479 | } | |
1480 | ||
1481 | pci_bus_size_bridges(bus); | |
1482 | pci_bus_assign_resources(bus); | |
1483 | acpiphp_sanitize_bus(bus); | |
1484 | acpiphp_set_hpp_values(handle, bus); | |
1485 | pci_enable_bridges(bus); | |
a0d399a8 | 1486 | acpiphp_configure_ioapics(handle); |
8e7561cf RS |
1487 | return 0; |
1488 | } | |
1489 | ||
1490 | static void handle_bridge_insertion(acpi_handle handle, u32 type) | |
1491 | { | |
1492 | struct acpi_device *device, *pdevice; | |
1493 | acpi_handle phandle; | |
1494 | ||
1495 | if ((type != ACPI_NOTIFY_BUS_CHECK) && | |
1496 | (type != ACPI_NOTIFY_DEVICE_CHECK)) { | |
1497 | err("unexpected notification type %d\n", type); | |
1498 | return; | |
1499 | } | |
1500 | ||
1501 | acpi_get_parent(handle, &phandle); | |
1502 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1503 | dbg("no parent device, assuming NULL\n"); | |
1504 | pdevice = NULL; | |
1505 | } | |
1506 | if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) { | |
1507 | err("cannot add bridge to acpi list\n"); | |
1508 | return; | |
1509 | } | |
1510 | if (!acpiphp_configure_bridge(handle) && | |
1511 | !acpi_bus_start(device)) | |
1512 | add_bridge(handle); | |
1513 | else | |
1514 | err("cannot configure and start bridge\n"); | |
1515 | ||
1516 | } | |
1517 | ||
1da177e4 LT |
1518 | /* |
1519 | * ACPI event handlers | |
1520 | */ | |
1521 | ||
0bbd6424 GH |
1522 | static acpi_status |
1523 | count_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1524 | { | |
1525 | int *count = (int *)context; | |
1526 | struct acpiphp_bridge *bridge; | |
1527 | ||
1528 | bridge = acpiphp_handle_to_bridge(handle); | |
1529 | if (bridge) | |
1530 | (*count)++; | |
1531 | return AE_OK ; | |
1532 | } | |
1533 | ||
1534 | static acpi_status | |
1535 | check_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1536 | { | |
1537 | struct acpiphp_bridge *bridge; | |
1538 | char objname[64]; | |
1539 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1540 | .pointer = objname }; | |
1541 | ||
1542 | bridge = acpiphp_handle_to_bridge(handle); | |
1543 | if (bridge) { | |
1544 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1545 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1546 | __func__, objname); |
0bbd6424 GH |
1547 | acpiphp_check_bridge(bridge); |
1548 | } | |
1549 | return AE_OK ; | |
1550 | } | |
1551 | ||
1da177e4 LT |
1552 | /** |
1553 | * handle_hotplug_event_bridge - handle ACPI event on bridges | |
1da177e4 LT |
1554 | * @handle: Notify()'ed acpi_handle |
1555 | * @type: Notify code | |
1556 | * @context: pointer to acpiphp_bridge structure | |
1557 | * | |
26e6c66e | 1558 | * Handles ACPI event notification on {host,p2p} bridges. |
1da177e4 LT |
1559 | */ |
1560 | static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context) | |
1561 | { | |
1562 | struct acpiphp_bridge *bridge; | |
1563 | char objname[64]; | |
1564 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1565 | .pointer = objname }; | |
8e7561cf | 1566 | struct acpi_device *device; |
0bbd6424 | 1567 | int num_sub_bridges = 0; |
1da177e4 | 1568 | |
8e7561cf RS |
1569 | if (acpi_bus_get_device(handle, &device)) { |
1570 | /* This bridge must have just been physically inserted */ | |
1571 | handle_bridge_insertion(handle, type); | |
1572 | return; | |
1573 | } | |
1574 | ||
1575 | bridge = acpiphp_handle_to_bridge(handle); | |
0bbd6424 GH |
1576 | if (type == ACPI_NOTIFY_BUS_CHECK) { |
1577 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, ACPI_UINT32_MAX, | |
1578 | count_sub_bridges, &num_sub_bridges, NULL); | |
1579 | } | |
1580 | ||
1581 | if (!bridge && !num_sub_bridges) { | |
8e7561cf RS |
1582 | err("cannot get bridge info\n"); |
1583 | return; | |
1584 | } | |
1da177e4 LT |
1585 | |
1586 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1587 | ||
1588 | switch (type) { | |
1589 | case ACPI_NOTIFY_BUS_CHECK: | |
1590 | /* bus re-enumerate */ | |
66bef8c0 | 1591 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
0bbd6424 GH |
1592 | if (bridge) { |
1593 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1594 | __func__, objname); |
0bbd6424 GH |
1595 | acpiphp_check_bridge(bridge); |
1596 | } | |
1597 | if (num_sub_bridges) | |
1598 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
1599 | ACPI_UINT32_MAX, check_sub_bridges, NULL, NULL); | |
1da177e4 LT |
1600 | break; |
1601 | ||
1602 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1603 | /* device check */ | |
66bef8c0 | 1604 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1605 | acpiphp_check_bridge(bridge); |
1606 | break; | |
1607 | ||
1608 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1609 | /* wake event */ | |
66bef8c0 | 1610 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1611 | break; |
1612 | ||
1613 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1614 | /* request device eject */ | |
66bef8c0 | 1615 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
551bcb75 MT |
1616 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
1617 | (bridge->flags & BRIDGE_HAS_EJ0)) { | |
1618 | struct acpiphp_slot *slot; | |
1619 | slot = bridge->func->slot; | |
1620 | if (!acpiphp_disable_slot(slot)) | |
1621 | acpiphp_eject_slot(slot); | |
1622 | } | |
1da177e4 LT |
1623 | break; |
1624 | ||
1625 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1626 | printk(KERN_ERR "Device %s cannot be configured due" | |
1627 | " to a frequency mismatch\n", objname); | |
1628 | break; | |
1629 | ||
1630 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1631 | printk(KERN_ERR "Device %s cannot be configured due" | |
1632 | " to a bus mode mismatch\n", objname); | |
1633 | break; | |
1634 | ||
1635 | case ACPI_NOTIFY_POWER_FAULT: | |
1636 | printk(KERN_ERR "Device %s has suffered a power fault\n", | |
1637 | objname); | |
1638 | break; | |
1639 | ||
1640 | default: | |
1641 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1642 | break; | |
1643 | } | |
1644 | } | |
1645 | ||
1da177e4 LT |
1646 | /** |
1647 | * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) | |
1da177e4 LT |
1648 | * @handle: Notify()'ed acpi_handle |
1649 | * @type: Notify code | |
1650 | * @context: pointer to acpiphp_func structure | |
1651 | * | |
26e6c66e | 1652 | * Handles ACPI event notification on slots. |
1da177e4 | 1653 | */ |
2b85e130 | 1654 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) |
1da177e4 LT |
1655 | { |
1656 | struct acpiphp_func *func; | |
1657 | char objname[64]; | |
1658 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1659 | .pointer = objname }; | |
1660 | ||
1661 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1662 | ||
1663 | func = (struct acpiphp_func *)context; | |
1664 | ||
1665 | switch (type) { | |
1666 | case ACPI_NOTIFY_BUS_CHECK: | |
1667 | /* bus re-enumerate */ | |
66bef8c0 | 1668 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
1da177e4 LT |
1669 | acpiphp_enable_slot(func->slot); |
1670 | break; | |
1671 | ||
1672 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1673 | /* device check : re-enumerate from parent bus */ | |
66bef8c0 | 1674 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1675 | acpiphp_check_bridge(func->slot->bridge); |
1676 | break; | |
1677 | ||
1678 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1679 | /* wake event */ | |
66bef8c0 | 1680 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1681 | break; |
1682 | ||
1683 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1684 | /* request device eject */ | |
66bef8c0 | 1685 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
8d50e332 RS |
1686 | if (!(acpiphp_disable_slot(func->slot))) |
1687 | acpiphp_eject_slot(func->slot); | |
1da177e4 LT |
1688 | break; |
1689 | ||
1690 | default: | |
1691 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1692 | break; | |
1693 | } | |
1694 | } | |
1695 | ||
8e7561cf RS |
1696 | |
1697 | static acpi_status | |
1698 | find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1699 | { | |
1700 | int *count = (int *)context; | |
1701 | ||
783c49fc | 1702 | if (acpi_root_bridge(handle)) { |
8e7561cf RS |
1703 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1704 | handle_hotplug_event_bridge, NULL); | |
1705 | (*count)++; | |
1706 | } | |
1707 | return AE_OK ; | |
1708 | } | |
1da177e4 LT |
1709 | |
1710 | static struct acpi_pci_driver acpi_pci_hp_driver = { | |
1711 | .add = add_bridge, | |
1712 | .remove = remove_bridge, | |
1713 | }; | |
1714 | ||
1715 | /** | |
1716 | * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures | |
1da177e4 LT |
1717 | */ |
1718 | int __init acpiphp_glue_init(void) | |
1719 | { | |
8e7561cf | 1720 | int num = 0; |
1da177e4 | 1721 | |
8e7561cf RS |
1722 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
1723 | ACPI_UINT32_MAX, find_root_bridges, &num, NULL); | |
1da177e4 LT |
1724 | |
1725 | if (num <= 0) | |
1726 | return -1; | |
8e7561cf RS |
1727 | else |
1728 | acpi_pci_register_driver(&acpi_pci_hp_driver); | |
1da177e4 LT |
1729 | |
1730 | return 0; | |
1731 | } | |
1732 | ||
1733 | ||
1734 | /** | |
1735 | * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures | |
1736 | * | |
26e6c66e | 1737 | * This function frees all data allocated in acpiphp_glue_init(). |
1da177e4 | 1738 | */ |
031f30d2 | 1739 | void acpiphp_glue_exit(void) |
1da177e4 | 1740 | { |
1da177e4 LT |
1741 | acpi_pci_unregister_driver(&acpi_pci_hp_driver); |
1742 | } | |
1743 | ||
1744 | ||
1745 | /** | |
1746 | * acpiphp_get_num_slots - count number of slots in a system | |
1747 | */ | |
1748 | int __init acpiphp_get_num_slots(void) | |
1749 | { | |
1da177e4 | 1750 | struct acpiphp_bridge *bridge; |
467c442f | 1751 | int num_slots = 0; |
1da177e4 | 1752 | |
467c442f | 1753 | list_for_each_entry (bridge, &bridge_list, list) { |
42f49a6a RS |
1754 | dbg("Bus %04x:%02x has %d slot%s\n", |
1755 | pci_domain_nr(bridge->pci_bus), | |
1756 | bridge->pci_bus->number, bridge->nr_slots, | |
1757 | bridge->nr_slots == 1 ? "" : "s"); | |
1da177e4 LT |
1758 | num_slots += bridge->nr_slots; |
1759 | } | |
1760 | ||
42f49a6a | 1761 | dbg("Total %d slots\n", num_slots); |
1da177e4 LT |
1762 | return num_slots; |
1763 | } | |
1764 | ||
1765 | ||
1766 | #if 0 | |
1767 | /** | |
1768 | * acpiphp_for_each_slot - call function for each slot | |
1769 | * @fn: callback function | |
1770 | * @data: context to be passed to callback function | |
1da177e4 LT |
1771 | */ |
1772 | static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) | |
1773 | { | |
1774 | struct list_head *node; | |
1775 | struct acpiphp_bridge *bridge; | |
1776 | struct acpiphp_slot *slot; | |
1777 | int retval = 0; | |
1778 | ||
1779 | list_for_each (node, &bridge_list) { | |
1780 | bridge = (struct acpiphp_bridge *)node; | |
1781 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1782 | retval = fn(slot, data); | |
1783 | if (!retval) | |
1784 | goto err_exit; | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | err_exit: | |
1789 | return retval; | |
1790 | } | |
1791 | #endif | |
1792 | ||
1da177e4 LT |
1793 | |
1794 | /** | |
1795 | * acpiphp_enable_slot - power on slot | |
26e6c66e | 1796 | * @slot: ACPI PHP slot |
1da177e4 LT |
1797 | */ |
1798 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
1799 | { | |
1800 | int retval; | |
1801 | ||
6aa4cdd0 | 1802 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1803 | |
1804 | /* wake up all functions */ | |
1805 | retval = power_on_slot(slot); | |
1806 | if (retval) | |
1807 | goto err_exit; | |
1808 | ||
cde0e5d7 | 1809 | if (get_slot_status(slot) == ACPI_STA_ALL) { |
1da177e4 LT |
1810 | /* configure all functions */ |
1811 | retval = enable_device(slot); | |
cde0e5d7 MT |
1812 | if (retval) |
1813 | power_off_slot(slot); | |
1814 | } else { | |
66bef8c0 | 1815 | dbg("%s: Slot status is not ACPI_STA_ALL\n", __func__); |
cde0e5d7 MT |
1816 | power_off_slot(slot); |
1817 | } | |
1da177e4 LT |
1818 | |
1819 | err_exit: | |
6aa4cdd0 | 1820 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1821 | return retval; |
1822 | } | |
1823 | ||
1da177e4 LT |
1824 | /** |
1825 | * acpiphp_disable_slot - power off slot | |
26e6c66e | 1826 | * @slot: ACPI PHP slot |
1da177e4 LT |
1827 | */ |
1828 | int acpiphp_disable_slot(struct acpiphp_slot *slot) | |
1829 | { | |
1830 | int retval = 0; | |
1831 | ||
6aa4cdd0 | 1832 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1833 | |
1834 | /* unconfigure all functions */ | |
1835 | retval = disable_device(slot); | |
1836 | if (retval) | |
1837 | goto err_exit; | |
1838 | ||
1839 | /* power off all functions */ | |
1840 | retval = power_off_slot(slot); | |
1841 | if (retval) | |
1842 | goto err_exit; | |
1843 | ||
1da177e4 | 1844 | err_exit: |
6aa4cdd0 | 1845 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1846 | return retval; |
1847 | } | |
1848 | ||
1849 | ||
1850 | /* | |
1851 | * slot enabled: 1 | |
1852 | * slot disabled: 0 | |
1853 | */ | |
1854 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
1855 | { | |
8d50e332 | 1856 | return (slot->flags & SLOT_POWEREDON); |
1da177e4 LT |
1857 | } |
1858 | ||
1859 | ||
1860 | /* | |
35ae61a0 MT |
1861 | * latch open: 1 |
1862 | * latch closed: 0 | |
1da177e4 LT |
1863 | */ |
1864 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1865 | { | |
1866 | unsigned int sta; | |
1867 | ||
1868 | sta = get_slot_status(slot); | |
1869 | ||
35ae61a0 | 1870 | return (sta & ACPI_STA_SHOW_IN_UI) ? 0 : 1; |
1da177e4 LT |
1871 | } |
1872 | ||
1873 | ||
1874 | /* | |
1875 | * adapter presence : 1 | |
1876 | * absence : 0 | |
1877 | */ | |
1878 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1879 | { | |
1880 | unsigned int sta; | |
1881 | ||
1882 | sta = get_slot_status(slot); | |
1883 | ||
1884 | return (sta == 0) ? 0 : 1; | |
1885 | } |