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 | ||
1253f7aa SL |
172 | static struct acpi_dock_ops acpiphp_dock_ops = { |
173 | .handler = handle_hotplug_event_func, | |
174 | }; | |
1da177e4 LT |
175 | |
176 | /* callback routine to register each ACPI PCI slot object */ | |
177 | static acpi_status | |
178 | register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) | |
179 | { | |
180 | struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context; | |
181 | struct acpiphp_slot *slot; | |
182 | struct acpiphp_func *newfunc; | |
183 | acpi_handle tmp; | |
184 | acpi_status status = AE_OK; | |
27663c58 | 185 | unsigned long long adr, sun; |
e27da381 | 186 | int device, function, retval; |
1da177e4 LT |
187 | |
188 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr); | |
189 | ||
190 | if (ACPI_FAILURE(status)) | |
191 | return AE_OK; | |
192 | ||
193 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
194 | ||
4e8662bb | 195 | if (ACPI_FAILURE(status) && !(is_dock_device(handle))) |
1da177e4 LT |
196 | return AE_OK; |
197 | ||
198 | device = (adr >> 16) & 0xffff; | |
199 | function = adr & 0xffff; | |
200 | ||
f5afe806 | 201 | newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL); |
1da177e4 LT |
202 | if (!newfunc) |
203 | return AE_NO_MEMORY; | |
1da177e4 LT |
204 | |
205 | INIT_LIST_HEAD(&newfunc->sibling); | |
206 | newfunc->handle = handle; | |
207 | newfunc->function = function; | |
20416ea5 KA |
208 | if (ACPI_SUCCESS(status)) |
209 | newfunc->flags = FUNC_HAS_EJ0; | |
1da177e4 LT |
210 | |
211 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp))) | |
212 | newfunc->flags |= FUNC_HAS_STA; | |
213 | ||
214 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp))) | |
215 | newfunc->flags |= FUNC_HAS_PS0; | |
216 | ||
217 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) | |
218 | newfunc->flags |= FUNC_HAS_PS3; | |
219 | ||
4e8662bb | 220 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp))) |
20416ea5 | 221 | newfunc->flags |= FUNC_HAS_DCK; |
20416ea5 | 222 | |
1da177e4 | 223 | status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); |
95b38b3f KA |
224 | if (ACPI_FAILURE(status)) { |
225 | /* | |
226 | * use the count of the number of slots we've found | |
227 | * for the number of the slot | |
228 | */ | |
229 | sun = bridge->nr_slots+1; | |
230 | } | |
1da177e4 LT |
231 | |
232 | /* search for objects that share the same slot */ | |
233 | for (slot = bridge->slots; slot; slot = slot->next) | |
234 | if (slot->device == device) { | |
235 | if (slot->sun != sun) | |
236 | warn("sibling found, but _SUN doesn't match!\n"); | |
237 | break; | |
238 | } | |
239 | ||
240 | if (!slot) { | |
f5afe806 | 241 | slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); |
1da177e4 LT |
242 | if (!slot) { |
243 | kfree(newfunc); | |
244 | return AE_NO_MEMORY; | |
245 | } | |
246 | ||
1da177e4 | 247 | slot->bridge = bridge; |
1da177e4 LT |
248 | slot->device = device; |
249 | slot->sun = sun; | |
250 | INIT_LIST_HEAD(&slot->funcs); | |
6aa4cdd0 | 251 | mutex_init(&slot->crit_sect); |
1da177e4 LT |
252 | |
253 | slot->next = bridge->slots; | |
254 | bridge->slots = slot; | |
255 | ||
256 | bridge->nr_slots++; | |
257 | ||
b6adc195 | 258 | dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n", |
42f49a6a RS |
259 | slot->sun, pci_domain_nr(bridge->pci_bus), |
260 | bridge->pci_bus->number, slot->device); | |
e27da381 MT |
261 | retval = acpiphp_register_hotplug_slot(slot); |
262 | if (retval) { | |
f46753c5 | 263 | if (retval == -EBUSY) |
b6adc195 | 264 | warn("Slot %llu already registered by another " |
f46753c5 AC |
265 | "hotplug driver\n", slot->sun); |
266 | else | |
267 | warn("acpiphp_register_hotplug_slot failed " | |
268 | "(err code = 0x%x)\n", retval); | |
e27da381 MT |
269 | goto err_exit; |
270 | } | |
1da177e4 LT |
271 | } |
272 | ||
273 | newfunc->slot = slot; | |
274 | list_add_tail(&newfunc->sibling, &slot->funcs); | |
275 | ||
276 | /* associate corresponding pci_dev */ | |
42f49a6a | 277 | newfunc->pci_dev = pci_get_slot(bridge->pci_bus, |
1da177e4 LT |
278 | PCI_DEVFN(device, function)); |
279 | if (newfunc->pci_dev) { | |
1da177e4 LT |
280 | slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); |
281 | } | |
282 | ||
4e8662bb KA |
283 | if (is_dock_device(handle)) { |
284 | /* we don't want to call this device's _EJ0 | |
285 | * because we want the dock notify handler | |
286 | * to call it after it calls _DCK | |
20416ea5 KA |
287 | */ |
288 | newfunc->flags &= ~FUNC_HAS_EJ0; | |
4e8662bb | 289 | if (register_hotplug_dock_device(handle, |
1253f7aa | 290 | &acpiphp_dock_ops, newfunc)) |
4e8662bb KA |
291 | dbg("failed to register dock device\n"); |
292 | ||
293 | /* we need to be notified when dock events happen | |
294 | * outside of the hotplug operation, since we may | |
295 | * need to do fixups before we can hotplug. | |
296 | */ | |
297 | newfunc->nb.notifier_call = post_dock_fixups; | |
298 | if (register_dock_notifier(&newfunc->nb)) | |
299 | dbg("failed to register a dock notifier"); | |
20416ea5 KA |
300 | } |
301 | ||
1da177e4 | 302 | /* install notify handler */ |
20416ea5 KA |
303 | if (!(newfunc->flags & FUNC_HAS_DCK)) { |
304 | status = acpi_install_notify_handler(handle, | |
1da177e4 LT |
305 | ACPI_SYSTEM_NOTIFY, |
306 | handle_hotplug_event_func, | |
307 | newfunc); | |
308 | ||
20416ea5 KA |
309 | if (ACPI_FAILURE(status)) |
310 | err("failed to register interrupt notify handler\n"); | |
311 | } else | |
312 | status = AE_OK; | |
1da177e4 | 313 | |
20416ea5 | 314 | return status; |
e27da381 MT |
315 | |
316 | err_exit: | |
317 | bridge->nr_slots--; | |
318 | bridge->slots = slot->next; | |
319 | kfree(slot); | |
320 | kfree(newfunc); | |
321 | ||
322 | return AE_OK; | |
1da177e4 LT |
323 | } |
324 | ||
325 | ||
326 | /* see if it's worth looking at this bridge */ | |
327 | static int detect_ejectable_slots(acpi_handle *bridge_handle) | |
328 | { | |
329 | acpi_status status; | |
330 | int count; | |
331 | ||
332 | count = 0; | |
333 | ||
334 | /* only check slots defined directly below bridge object */ | |
335 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1, | |
336 | is_ejectable_slot, (void *)&count, NULL); | |
337 | ||
4e8662bb KA |
338 | /* |
339 | * we also need to add this bridge if there is a dock bridge or | |
340 | * other pci device on a dock station (removable) | |
341 | */ | |
342 | if (!count) | |
343 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, | |
344 | (u32)1, is_pci_dock_device, (void *)&count, | |
345 | NULL); | |
346 | ||
1da177e4 LT |
347 | return count; |
348 | } | |
349 | ||
350 | ||
1da177e4 LT |
351 | /* decode ACPI 2.0 _HPP hot plug parameters */ |
352 | static void decode_hpp(struct acpiphp_bridge *bridge) | |
353 | { | |
354 | acpi_status status; | |
1da177e4 | 355 | |
7430e34c | 356 | status = acpi_get_hp_params_from_firmware(bridge->pci_bus, &bridge->hpp); |
e22b7350 KK |
357 | if (ACPI_FAILURE(status) || |
358 | !bridge->hpp.t0 || (bridge->hpp.t0->revision > 1)) { | |
783c49fc | 359 | /* use default numbers */ |
e22b7350 KK |
360 | printk(KERN_WARNING |
361 | "%s: Could not get hotplug parameters. Use defaults\n", | |
66bef8c0 | 362 | __func__); |
e22b7350 KK |
363 | bridge->hpp.t0 = &bridge->hpp.type0_data; |
364 | bridge->hpp.t0->revision = 0; | |
365 | bridge->hpp.t0->cache_line_size = 0x10; | |
366 | bridge->hpp.t0->latency_timer = 0x40; | |
367 | bridge->hpp.t0->enable_serr = 0; | |
368 | bridge->hpp.t0->enable_perr = 0; | |
1da177e4 | 369 | } |
1da177e4 LT |
370 | } |
371 | ||
372 | ||
783c49fc | 373 | |
1da177e4 LT |
374 | /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */ |
375 | static void init_bridge_misc(struct acpiphp_bridge *bridge) | |
376 | { | |
377 | acpi_status status; | |
378 | ||
379 | /* decode ACPI 2.0 _HPP (hot plug parameters) */ | |
380 | decode_hpp(bridge); | |
381 | ||
e27da381 MT |
382 | /* must be added to the list prior to calling register_slot */ |
383 | list_add(&bridge->list, &bridge_list); | |
384 | ||
1da177e4 LT |
385 | /* register all slot objects under this bridge */ |
386 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1, | |
387 | register_slot, bridge, NULL); | |
e27da381 MT |
388 | if (ACPI_FAILURE(status)) { |
389 | list_del(&bridge->list); | |
390 | return; | |
391 | } | |
1da177e4 LT |
392 | |
393 | /* install notify handler */ | |
8e7561cf | 394 | if (bridge->type != BRIDGE_TYPE_HOST) { |
551bcb75 MT |
395 | if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) { |
396 | status = acpi_remove_notify_handler(bridge->func->handle, | |
397 | ACPI_SYSTEM_NOTIFY, | |
398 | handle_hotplug_event_func); | |
399 | if (ACPI_FAILURE(status)) | |
400 | err("failed to remove notify handler\n"); | |
401 | } | |
8e7561cf | 402 | status = acpi_install_notify_handler(bridge->handle, |
1da177e4 LT |
403 | ACPI_SYSTEM_NOTIFY, |
404 | handle_hotplug_event_bridge, | |
405 | bridge); | |
406 | ||
8e7561cf RS |
407 | if (ACPI_FAILURE(status)) { |
408 | err("failed to register interrupt notify handler\n"); | |
409 | } | |
1da177e4 | 410 | } |
1da177e4 LT |
411 | } |
412 | ||
413 | ||
551bcb75 MT |
414 | /* find acpiphp_func from acpiphp_bridge */ |
415 | static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle) | |
416 | { | |
417 | struct list_head *node, *l; | |
418 | struct acpiphp_bridge *bridge; | |
419 | struct acpiphp_slot *slot; | |
420 | struct acpiphp_func *func; | |
421 | ||
422 | list_for_each(node, &bridge_list) { | |
423 | bridge = list_entry(node, struct acpiphp_bridge, list); | |
424 | for (slot = bridge->slots; slot; slot = slot->next) { | |
425 | list_for_each(l, &slot->funcs) { | |
426 | func = list_entry(l, struct acpiphp_func, | |
427 | sibling); | |
428 | if (func->handle == handle) | |
429 | return func; | |
430 | } | |
431 | } | |
432 | } | |
433 | ||
434 | return NULL; | |
435 | } | |
436 | ||
437 | ||
438 | static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge) | |
439 | { | |
440 | acpi_handle dummy_handle; | |
441 | ||
442 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
443 | "_STA", &dummy_handle))) | |
444 | bridge->flags |= BRIDGE_HAS_STA; | |
445 | ||
446 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
447 | "_EJ0", &dummy_handle))) | |
448 | bridge->flags |= BRIDGE_HAS_EJ0; | |
449 | ||
450 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
451 | "_PS0", &dummy_handle))) | |
452 | bridge->flags |= BRIDGE_HAS_PS0; | |
453 | ||
454 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
455 | "_PS3", &dummy_handle))) | |
456 | bridge->flags |= BRIDGE_HAS_PS3; | |
457 | ||
458 | /* is this ejectable p2p bridge? */ | |
459 | if (bridge->flags & BRIDGE_HAS_EJ0) { | |
460 | struct acpiphp_func *func; | |
461 | ||
462 | dbg("found ejectable p2p bridge\n"); | |
463 | ||
464 | /* make link between PCI bridge and PCI function */ | |
465 | func = acpiphp_bridge_handle_to_function(bridge->handle); | |
466 | if (!func) | |
467 | return; | |
468 | bridge->func = func; | |
469 | func->bridge = bridge; | |
470 | } | |
471 | } | |
472 | ||
473 | ||
1da177e4 | 474 | /* allocate and initialize host bridge data structure */ |
42f49a6a | 475 | static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus) |
1da177e4 | 476 | { |
1da177e4 LT |
477 | struct acpiphp_bridge *bridge; |
478 | ||
f5afe806 | 479 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
480 | if (bridge == NULL) |
481 | return; | |
482 | ||
1da177e4 LT |
483 | bridge->type = BRIDGE_TYPE_HOST; |
484 | bridge->handle = handle; | |
1da177e4 | 485 | |
42f49a6a | 486 | bridge->pci_bus = pci_bus; |
1da177e4 LT |
487 | |
488 | spin_lock_init(&bridge->res_lock); | |
489 | ||
1da177e4 LT |
490 | init_bridge_misc(bridge); |
491 | } | |
492 | ||
493 | ||
494 | /* allocate and initialize PCI-to-PCI bridge data structure */ | |
42f49a6a | 495 | static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev) |
1da177e4 LT |
496 | { |
497 | struct acpiphp_bridge *bridge; | |
1da177e4 | 498 | |
f5afe806 | 499 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
500 | if (bridge == NULL) { |
501 | err("out of memory\n"); | |
502 | return; | |
503 | } | |
504 | ||
1da177e4 LT |
505 | bridge->type = BRIDGE_TYPE_P2P; |
506 | bridge->handle = handle; | |
551bcb75 | 507 | config_p2p_bridge_flags(bridge); |
1da177e4 | 508 | |
42f49a6a RS |
509 | bridge->pci_dev = pci_dev_get(pci_dev); |
510 | bridge->pci_bus = pci_dev->subordinate; | |
1da177e4 LT |
511 | if (!bridge->pci_bus) { |
512 | err("This is not a PCI-to-PCI bridge!\n"); | |
42f49a6a | 513 | goto err; |
1da177e4 LT |
514 | } |
515 | ||
516 | spin_lock_init(&bridge->res_lock); | |
517 | ||
1da177e4 | 518 | init_bridge_misc(bridge); |
42f49a6a RS |
519 | return; |
520 | err: | |
521 | pci_dev_put(pci_dev); | |
522 | kfree(bridge); | |
523 | return; | |
1da177e4 LT |
524 | } |
525 | ||
526 | ||
527 | /* callback routine to find P2P bridges */ | |
528 | static acpi_status | |
529 | find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
530 | { | |
531 | acpi_status status; | |
532 | acpi_handle dummy_handle; | |
27663c58 | 533 | unsigned long long tmp; |
42f49a6a | 534 | int device, function; |
1da177e4 | 535 | struct pci_dev *dev; |
42f49a6a | 536 | struct pci_bus *pci_bus = context; |
1da177e4 LT |
537 | |
538 | status = acpi_get_handle(handle, "_ADR", &dummy_handle); | |
539 | if (ACPI_FAILURE(status)) | |
540 | return AE_OK; /* continue */ | |
541 | ||
542 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp); | |
543 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 544 | dbg("%s: _ADR evaluation failure\n", __func__); |
1da177e4 LT |
545 | return AE_OK; |
546 | } | |
547 | ||
548 | device = (tmp >> 16) & 0xffff; | |
549 | function = tmp & 0xffff; | |
550 | ||
42f49a6a | 551 | dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function)); |
1da177e4 | 552 | |
42f49a6a RS |
553 | if (!dev || !dev->subordinate) |
554 | goto out; | |
1da177e4 LT |
555 | |
556 | /* check if this bridge has ejectable slots */ | |
4e8662bb | 557 | if ((detect_ejectable_slots(handle) > 0)) { |
1da177e4 | 558 | dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); |
42f49a6a | 559 | add_p2p_bridge(handle, dev); |
1da177e4 LT |
560 | } |
561 | ||
7c8f25da KK |
562 | /* search P2P bridges under this p2p bridge */ |
563 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
564 | find_p2p_bridge, dev->subordinate, NULL); | |
565 | if (ACPI_FAILURE(status)) | |
551bcb75 | 566 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
7c8f25da | 567 | |
42f49a6a RS |
568 | out: |
569 | pci_dev_put(dev); | |
1da177e4 LT |
570 | return AE_OK; |
571 | } | |
572 | ||
573 | ||
574 | /* find hot-pluggable slots, and then find P2P bridge */ | |
575 | static int add_bridge(acpi_handle handle) | |
576 | { | |
577 | acpi_status status; | |
27663c58 | 578 | unsigned long long tmp; |
1da177e4 LT |
579 | int seg, bus; |
580 | acpi_handle dummy_handle; | |
42f49a6a | 581 | struct pci_bus *pci_bus; |
1da177e4 LT |
582 | |
583 | /* if the bridge doesn't have _STA, we assume it is always there */ | |
584 | status = acpi_get_handle(handle, "_STA", &dummy_handle); | |
585 | if (ACPI_SUCCESS(status)) { | |
586 | status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp); | |
587 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 588 | dbg("%s: _STA evaluation failure\n", __func__); |
1da177e4 LT |
589 | return 0; |
590 | } | |
591 | if ((tmp & ACPI_STA_FUNCTIONING) == 0) | |
592 | /* don't register this object */ | |
593 | return 0; | |
594 | } | |
595 | ||
596 | /* get PCI segment number */ | |
597 | status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp); | |
598 | ||
599 | seg = ACPI_SUCCESS(status) ? tmp : 0; | |
600 | ||
601 | /* get PCI bus number */ | |
602 | status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp); | |
603 | ||
604 | if (ACPI_SUCCESS(status)) { | |
605 | bus = tmp; | |
606 | } else { | |
607 | warn("can't get bus number, assuming 0\n"); | |
608 | bus = 0; | |
609 | } | |
610 | ||
42f49a6a RS |
611 | pci_bus = pci_find_bus(seg, bus); |
612 | if (!pci_bus) { | |
613 | err("Can't find bus %04x:%02x\n", seg, bus); | |
614 | return 0; | |
615 | } | |
616 | ||
1da177e4 LT |
617 | /* check if this bridge has ejectable slots */ |
618 | if (detect_ejectable_slots(handle) > 0) { | |
619 | dbg("found PCI host-bus bridge with hot-pluggable slots\n"); | |
42f49a6a | 620 | add_host_bridge(handle, pci_bus); |
1da177e4 LT |
621 | } |
622 | ||
1da177e4 LT |
623 | /* search P2P bridges under this host bridge */ |
624 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
42f49a6a | 625 | find_p2p_bridge, pci_bus, NULL); |
1da177e4 LT |
626 | |
627 | if (ACPI_FAILURE(status)) | |
551bcb75 | 628 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
1da177e4 LT |
629 | |
630 | return 0; | |
631 | } | |
632 | ||
42f49a6a RS |
633 | static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle) |
634 | { | |
635 | struct list_head *head; | |
636 | list_for_each(head, &bridge_list) { | |
637 | struct acpiphp_bridge *bridge = list_entry(head, | |
638 | struct acpiphp_bridge, list); | |
639 | if (bridge->handle == handle) | |
640 | return bridge; | |
641 | } | |
642 | ||
643 | return NULL; | |
644 | } | |
1da177e4 | 645 | |
364d5094 | 646 | static void cleanup_bridge(struct acpiphp_bridge *bridge) |
1da177e4 | 647 | { |
42f49a6a | 648 | struct list_head *list, *tmp; |
42f49a6a RS |
649 | struct acpiphp_slot *slot; |
650 | acpi_status status; | |
364d5094 | 651 | acpi_handle handle = bridge->handle; |
42f49a6a RS |
652 | |
653 | status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
654 | handle_hotplug_event_bridge); | |
655 | if (ACPI_FAILURE(status)) | |
656 | err("failed to remove notify handler\n"); | |
657 | ||
551bcb75 MT |
658 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
659 | ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) { | |
660 | status = acpi_install_notify_handler(bridge->func->handle, | |
661 | ACPI_SYSTEM_NOTIFY, | |
662 | handle_hotplug_event_func, | |
663 | bridge->func); | |
664 | if (ACPI_FAILURE(status)) | |
665 | err("failed to install interrupt notify handler\n"); | |
666 | } | |
667 | ||
42f49a6a RS |
668 | slot = bridge->slots; |
669 | while (slot) { | |
670 | struct acpiphp_slot *next = slot->next; | |
671 | list_for_each_safe (list, tmp, &slot->funcs) { | |
672 | struct acpiphp_func *func; | |
673 | func = list_entry(list, struct acpiphp_func, sibling); | |
4e8662bb KA |
674 | if (is_dock_device(func->handle)) { |
675 | unregister_hotplug_dock_device(func->handle); | |
676 | unregister_dock_notifier(&func->nb); | |
677 | } | |
20416ea5 KA |
678 | if (!(func->flags & FUNC_HAS_DCK)) { |
679 | status = acpi_remove_notify_handler(func->handle, | |
42f49a6a RS |
680 | ACPI_SYSTEM_NOTIFY, |
681 | handle_hotplug_event_func); | |
20416ea5 KA |
682 | if (ACPI_FAILURE(status)) |
683 | err("failed to remove notify handler\n"); | |
684 | } | |
42f49a6a RS |
685 | pci_dev_put(func->pci_dev); |
686 | list_del(list); | |
687 | kfree(func); | |
688 | } | |
e27da381 MT |
689 | acpiphp_unregister_hotplug_slot(slot); |
690 | list_del(&slot->funcs); | |
42f49a6a RS |
691 | kfree(slot); |
692 | slot = next; | |
693 | } | |
694 | ||
695 | pci_dev_put(bridge->pci_dev); | |
696 | list_del(&bridge->list); | |
697 | kfree(bridge); | |
1da177e4 LT |
698 | } |
699 | ||
364d5094 RS |
700 | static acpi_status |
701 | cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
702 | { | |
703 | struct acpiphp_bridge *bridge; | |
704 | ||
551bcb75 MT |
705 | /* cleanup p2p bridges under this P2P bridge |
706 | in a depth-first manner */ | |
707 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
708 | cleanup_p2p_bridge, NULL, NULL); | |
709 | ||
a13307ce AC |
710 | bridge = acpiphp_handle_to_bridge(handle); |
711 | if (bridge) | |
712 | cleanup_bridge(bridge); | |
713 | ||
364d5094 RS |
714 | return AE_OK; |
715 | } | |
716 | ||
717 | static void remove_bridge(acpi_handle handle) | |
718 | { | |
719 | struct acpiphp_bridge *bridge; | |
720 | ||
551bcb75 MT |
721 | /* cleanup p2p bridges under this host bridge |
722 | in a depth-first manner */ | |
723 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
724 | (u32)1, cleanup_p2p_bridge, NULL, NULL); | |
725 | ||
a13307ce AC |
726 | /* |
727 | * On root bridges with hotplug slots directly underneath (ie, | |
728 | * no p2p bridge inbetween), we call cleanup_bridge(). | |
729 | * | |
730 | * The else clause cleans up root bridges that either had no | |
731 | * hotplug slots at all, or had a p2p bridge underneath. | |
732 | */ | |
364d5094 | 733 | bridge = acpiphp_handle_to_bridge(handle); |
551bcb75 | 734 | if (bridge) |
364d5094 | 735 | cleanup_bridge(bridge); |
a13307ce AC |
736 | else |
737 | acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
738 | handle_hotplug_event_bridge); | |
364d5094 | 739 | } |
1da177e4 | 740 | |
a0d399a8 KK |
741 | static struct pci_dev * get_apic_pci_info(acpi_handle handle) |
742 | { | |
743 | struct acpi_pci_id id; | |
744 | struct pci_bus *bus; | |
745 | struct pci_dev *dev; | |
746 | ||
747 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &id))) | |
748 | return NULL; | |
749 | ||
750 | bus = pci_find_bus(id.segment, id.bus); | |
751 | if (!bus) | |
752 | return NULL; | |
753 | ||
754 | dev = pci_get_slot(bus, PCI_DEVFN(id.device, id.function)); | |
755 | if (!dev) | |
756 | return NULL; | |
757 | ||
758 | if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) && | |
759 | (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC)) | |
760 | { | |
761 | pci_dev_put(dev); | |
762 | return NULL; | |
763 | } | |
764 | ||
765 | return dev; | |
766 | } | |
767 | ||
768 | static int get_gsi_base(acpi_handle handle, u32 *gsi_base) | |
769 | { | |
770 | acpi_status status; | |
771 | int result = -1; | |
27663c58 | 772 | unsigned long long gsb; |
a0d399a8 KK |
773 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
774 | union acpi_object *obj; | |
775 | void *table; | |
776 | ||
777 | status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb); | |
778 | if (ACPI_SUCCESS(status)) { | |
779 | *gsi_base = (u32)gsb; | |
780 | return 0; | |
781 | } | |
782 | ||
783 | status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer); | |
784 | if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer) | |
785 | return -1; | |
786 | ||
787 | obj = buffer.pointer; | |
788 | if (obj->type != ACPI_TYPE_BUFFER) | |
789 | goto out; | |
790 | ||
791 | table = obj->buffer.pointer; | |
15a58ed1 AS |
792 | switch (((struct acpi_subtable_header *)table)->type) { |
793 | case ACPI_MADT_TYPE_IO_SAPIC: | |
794 | *gsi_base = ((struct acpi_madt_io_sapic *)table)->global_irq_base; | |
a0d399a8 KK |
795 | result = 0; |
796 | break; | |
15a58ed1 AS |
797 | case ACPI_MADT_TYPE_IO_APIC: |
798 | *gsi_base = ((struct acpi_madt_io_apic *)table)->global_irq_base; | |
a0d399a8 KK |
799 | result = 0; |
800 | break; | |
801 | default: | |
802 | break; | |
803 | } | |
804 | out: | |
81b26bca | 805 | kfree(buffer.pointer); |
a0d399a8 KK |
806 | return result; |
807 | } | |
808 | ||
809 | static acpi_status | |
810 | ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv) | |
811 | { | |
812 | acpi_status status; | |
27663c58 | 813 | unsigned long long sta; |
a0d399a8 KK |
814 | acpi_handle tmp; |
815 | struct pci_dev *pdev; | |
816 | u32 gsi_base; | |
817 | u64 phys_addr; | |
600812ec | 818 | struct acpiphp_ioapic *ioapic; |
a0d399a8 KK |
819 | |
820 | /* Evaluate _STA if present */ | |
821 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
822 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
823 | return AE_CTRL_DEPTH; | |
824 | ||
825 | /* Scan only PCI bus scope */ | |
826 | status = acpi_get_handle(handle, "_HID", &tmp); | |
827 | if (ACPI_SUCCESS(status)) | |
828 | return AE_CTRL_DEPTH; | |
829 | ||
830 | if (get_gsi_base(handle, &gsi_base)) | |
831 | return AE_OK; | |
832 | ||
600812ec ST |
833 | ioapic = kmalloc(sizeof(*ioapic), GFP_KERNEL); |
834 | if (!ioapic) | |
835 | return AE_NO_MEMORY; | |
836 | ||
a0d399a8 KK |
837 | pdev = get_apic_pci_info(handle); |
838 | if (!pdev) | |
600812ec | 839 | goto exit_kfree; |
a0d399a8 | 840 | |
600812ec ST |
841 | if (pci_enable_device(pdev)) |
842 | goto exit_pci_dev_put; | |
a0d399a8 KK |
843 | |
844 | pci_set_master(pdev); | |
845 | ||
600812ec ST |
846 | if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)")) |
847 | goto exit_pci_disable_device; | |
a0d399a8 KK |
848 | |
849 | phys_addr = pci_resource_start(pdev, 0); | |
600812ec ST |
850 | if (acpi_register_ioapic(handle, phys_addr, gsi_base)) |
851 | goto exit_pci_release_region; | |
852 | ||
853 | ioapic->gsi_base = gsi_base; | |
854 | ioapic->dev = pdev; | |
855 | spin_lock(&ioapic_list_lock); | |
856 | list_add_tail(&ioapic->list, &ioapic_list); | |
857 | spin_unlock(&ioapic_list_lock); | |
858 | ||
859 | return AE_OK; | |
860 | ||
861 | exit_pci_release_region: | |
862 | pci_release_region(pdev, 0); | |
863 | exit_pci_disable_device: | |
864 | pci_disable_device(pdev); | |
865 | exit_pci_dev_put: | |
866 | pci_dev_put(pdev); | |
867 | exit_kfree: | |
868 | kfree(ioapic); | |
869 | ||
870 | return AE_OK; | |
871 | } | |
872 | ||
873 | static acpi_status | |
874 | ioapic_remove(acpi_handle handle, u32 lvl, void *context, void **rv) | |
875 | { | |
876 | acpi_status status; | |
27663c58 | 877 | unsigned long long sta; |
600812ec ST |
878 | acpi_handle tmp; |
879 | u32 gsi_base; | |
880 | struct acpiphp_ioapic *pos, *n, *ioapic = NULL; | |
881 | ||
882 | /* Evaluate _STA if present */ | |
883 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
884 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
885 | return AE_CTRL_DEPTH; | |
886 | ||
887 | /* Scan only PCI bus scope */ | |
888 | status = acpi_get_handle(handle, "_HID", &tmp); | |
889 | if (ACPI_SUCCESS(status)) | |
890 | return AE_CTRL_DEPTH; | |
891 | ||
892 | if (get_gsi_base(handle, &gsi_base)) | |
a0d399a8 | 893 | return AE_OK; |
600812ec ST |
894 | |
895 | acpi_unregister_ioapic(handle, gsi_base); | |
896 | ||
897 | spin_lock(&ioapic_list_lock); | |
898 | list_for_each_entry_safe(pos, n, &ioapic_list, list) { | |
899 | if (pos->gsi_base != gsi_base) | |
900 | continue; | |
901 | ioapic = pos; | |
902 | list_del(&ioapic->list); | |
903 | break; | |
a0d399a8 | 904 | } |
600812ec ST |
905 | spin_unlock(&ioapic_list_lock); |
906 | ||
907 | if (!ioapic) | |
908 | return AE_OK; | |
909 | ||
910 | pci_release_region(ioapic->dev, 0); | |
911 | pci_disable_device(ioapic->dev); | |
912 | pci_dev_put(ioapic->dev); | |
913 | kfree(ioapic); | |
a0d399a8 KK |
914 | |
915 | return AE_OK; | |
916 | } | |
917 | ||
918 | static int acpiphp_configure_ioapics(acpi_handle handle) | |
919 | { | |
9b1d19ee | 920 | ioapic_add(handle, 0, NULL, NULL); |
a0d399a8 KK |
921 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, |
922 | ACPI_UINT32_MAX, ioapic_add, NULL, NULL); | |
923 | return 0; | |
924 | } | |
925 | ||
600812ec ST |
926 | static int acpiphp_unconfigure_ioapics(acpi_handle handle) |
927 | { | |
928 | ioapic_remove(handle, 0, NULL, NULL); | |
929 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
930 | ACPI_UINT32_MAX, ioapic_remove, NULL, NULL); | |
931 | return 0; | |
932 | } | |
933 | ||
1da177e4 LT |
934 | static int power_on_slot(struct acpiphp_slot *slot) |
935 | { | |
936 | acpi_status status; | |
937 | struct acpiphp_func *func; | |
938 | struct list_head *l; | |
939 | int retval = 0; | |
940 | ||
941 | /* if already enabled, just skip */ | |
942 | if (slot->flags & SLOT_POWEREDON) | |
943 | goto err_exit; | |
944 | ||
945 | list_for_each (l, &slot->funcs) { | |
946 | func = list_entry(l, struct acpiphp_func, sibling); | |
947 | ||
948 | if (func->flags & FUNC_HAS_PS0) { | |
66bef8c0 | 949 | dbg("%s: executing _PS0\n", __func__); |
1da177e4 LT |
950 | status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); |
951 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 952 | warn("%s: _PS0 failed\n", __func__); |
1da177e4 LT |
953 | retval = -1; |
954 | goto err_exit; | |
955 | } else | |
956 | break; | |
957 | } | |
958 | } | |
959 | ||
960 | /* TBD: evaluate _STA to check if the slot is enabled */ | |
961 | ||
962 | slot->flags |= SLOT_POWEREDON; | |
963 | ||
964 | err_exit: | |
965 | return retval; | |
966 | } | |
967 | ||
968 | ||
969 | static int power_off_slot(struct acpiphp_slot *slot) | |
970 | { | |
971 | acpi_status status; | |
972 | struct acpiphp_func *func; | |
973 | struct list_head *l; | |
1da177e4 LT |
974 | |
975 | int retval = 0; | |
976 | ||
977 | /* if already disabled, just skip */ | |
978 | if ((slot->flags & SLOT_POWEREDON) == 0) | |
979 | goto err_exit; | |
980 | ||
981 | list_for_each (l, &slot->funcs) { | |
982 | func = list_entry(l, struct acpiphp_func, sibling); | |
983 | ||
2f523b15 | 984 | if (func->flags & FUNC_HAS_PS3) { |
1da177e4 LT |
985 | status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); |
986 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 987 | warn("%s: _PS3 failed\n", __func__); |
1da177e4 LT |
988 | retval = -1; |
989 | goto err_exit; | |
990 | } else | |
991 | break; | |
992 | } | |
993 | } | |
994 | ||
1da177e4 LT |
995 | /* TBD: evaluate _STA to check if the slot is disabled */ |
996 | ||
997 | slot->flags &= (~SLOT_POWEREDON); | |
998 | ||
999 | err_exit: | |
1000 | return retval; | |
1001 | } | |
1002 | ||
1003 | ||
15a1ae74 KA |
1004 | |
1005 | /** | |
26e6c66e | 1006 | * acpiphp_max_busnr - return the highest reserved bus number under the given bus. |
15a1ae74 | 1007 | * @bus: bus to start search with |
15a1ae74 KA |
1008 | */ |
1009 | static unsigned char acpiphp_max_busnr(struct pci_bus *bus) | |
1010 | { | |
1011 | struct list_head *tmp; | |
1012 | unsigned char max, n; | |
1013 | ||
1014 | /* | |
1015 | * pci_bus_max_busnr will return the highest | |
1016 | * reserved busnr for all these children. | |
1017 | * that is equivalent to the bus->subordinate | |
1018 | * value. We don't want to use the parent's | |
1019 | * bus->subordinate value because it could have | |
1020 | * padding in it. | |
1021 | */ | |
1022 | max = bus->secondary; | |
1023 | ||
1024 | list_for_each(tmp, &bus->children) { | |
1025 | n = pci_bus_max_busnr(pci_bus_b(tmp)); | |
1026 | if (n > max) | |
1027 | max = n; | |
1028 | } | |
1029 | return max; | |
1030 | } | |
1031 | ||
1032 | ||
15a1ae74 KA |
1033 | /** |
1034 | * acpiphp_bus_add - add a new bus to acpi subsystem | |
1035 | * @func: acpiphp_func of the bridge | |
15a1ae74 KA |
1036 | */ |
1037 | static int acpiphp_bus_add(struct acpiphp_func *func) | |
1038 | { | |
1039 | acpi_handle phandle; | |
1040 | struct acpi_device *device, *pdevice; | |
1041 | int ret_val; | |
1042 | ||
1043 | acpi_get_parent(func->handle, &phandle); | |
1044 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1045 | dbg("no parent device, assuming NULL\n"); | |
1046 | pdevice = NULL; | |
1047 | } | |
20416ea5 KA |
1048 | if (!acpi_bus_get_device(func->handle, &device)) { |
1049 | dbg("bus exists... trim\n"); | |
1050 | /* this shouldn't be in here, so remove | |
1051 | * the bus then re-add it... | |
1052 | */ | |
1053 | ret_val = acpi_bus_trim(device, 1); | |
1054 | dbg("acpi_bus_trim return %x\n", ret_val); | |
1055 | } | |
1056 | ||
1057 | ret_val = acpi_bus_add(&device, pdevice, func->handle, | |
1058 | ACPI_BUS_TYPE_DEVICE); | |
1059 | if (ret_val) { | |
1060 | dbg("error adding bus, %x\n", | |
1061 | -ret_val); | |
1062 | goto acpiphp_bus_add_out; | |
15a1ae74 KA |
1063 | } |
1064 | /* | |
1065 | * try to start anyway. We could have failed to add | |
1066 | * simply because this bus had previously been added | |
1067 | * on another add. Don't bother with the return value | |
1068 | * we just keep going. | |
1069 | */ | |
1070 | ret_val = acpi_bus_start(device); | |
1071 | ||
1072 | acpiphp_bus_add_out: | |
1073 | return ret_val; | |
1074 | } | |
1075 | ||
1076 | ||
92c9be95 MT |
1077 | /** |
1078 | * acpiphp_bus_trim - trim a bus from acpi subsystem | |
1079 | * @handle: handle to acpi namespace | |
92c9be95 | 1080 | */ |
6d47a5e4 | 1081 | static int acpiphp_bus_trim(acpi_handle handle) |
92c9be95 MT |
1082 | { |
1083 | struct acpi_device *device; | |
1084 | int retval; | |
1085 | ||
1086 | retval = acpi_bus_get_device(handle, &device); | |
1087 | if (retval) { | |
1088 | dbg("acpi_device not found\n"); | |
1089 | return retval; | |
1090 | } | |
1091 | ||
1092 | retval = acpi_bus_trim(device, 1); | |
1093 | if (retval) | |
1094 | err("cannot remove from acpi list\n"); | |
1095 | ||
1096 | return retval; | |
1097 | } | |
15a1ae74 | 1098 | |
1da177e4 LT |
1099 | /** |
1100 | * enable_device - enable, configure a slot | |
1101 | * @slot: slot to be enabled | |
1102 | * | |
1103 | * This function should be called per *physical slot*, | |
1104 | * not per each slot object in ACPI namespace. | |
1da177e4 | 1105 | */ |
0ab2b57f | 1106 | static int __ref enable_device(struct acpiphp_slot *slot) |
1da177e4 | 1107 | { |
1da177e4 | 1108 | struct pci_dev *dev; |
42f49a6a | 1109 | struct pci_bus *bus = slot->bridge->pci_bus; |
1da177e4 LT |
1110 | struct list_head *l; |
1111 | struct acpiphp_func *func; | |
1112 | int retval = 0; | |
42f49a6a | 1113 | int num, max, pass; |
551bcb75 | 1114 | acpi_status status; |
1da177e4 LT |
1115 | |
1116 | if (slot->flags & SLOT_ENABLED) | |
1117 | goto err_exit; | |
1118 | ||
1119 | /* sanity check: dev should be NULL when hot-plugged in */ | |
42f49a6a | 1120 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0)); |
1da177e4 LT |
1121 | if (dev) { |
1122 | /* This case shouldn't happen */ | |
1123 | err("pci_dev structure already exists.\n"); | |
42f49a6a | 1124 | pci_dev_put(dev); |
1da177e4 LT |
1125 | retval = -1; |
1126 | goto err_exit; | |
1127 | } | |
1128 | ||
42f49a6a RS |
1129 | num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0)); |
1130 | if (num == 0) { | |
1da177e4 LT |
1131 | err("No new device found\n"); |
1132 | retval = -1; | |
1133 | goto err_exit; | |
1134 | } | |
1135 | ||
15a1ae74 | 1136 | max = acpiphp_max_busnr(bus); |
42f49a6a RS |
1137 | for (pass = 0; pass < 2; pass++) { |
1138 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1139 | if (PCI_SLOT(dev->devfn) != slot->device) | |
1140 | continue; | |
1141 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || | |
c64b5eea | 1142 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
42f49a6a | 1143 | max = pci_scan_bridge(bus, dev, max, pass); |
92c9be95 | 1144 | if (pass && dev->subordinate) |
c64b5eea KA |
1145 | pci_bus_size_bridges(dev->subordinate); |
1146 | } | |
42f49a6a | 1147 | } |
1da177e4 LT |
1148 | } |
1149 | ||
92c9be95 MT |
1150 | list_for_each (l, &slot->funcs) { |
1151 | func = list_entry(l, struct acpiphp_func, sibling); | |
1152 | acpiphp_bus_add(func); | |
1153 | } | |
1154 | ||
42f49a6a | 1155 | pci_bus_assign_resources(bus); |
8e5dce35 | 1156 | acpiphp_sanitize_bus(bus); |
287af2fb | 1157 | acpiphp_set_hpp_values(slot->bridge->handle, bus); |
9b1d19ee ST |
1158 | list_for_each_entry(func, &slot->funcs, sibling) |
1159 | acpiphp_configure_ioapics(func->handle); | |
8e5dce35 | 1160 | pci_enable_bridges(bus); |
42f49a6a RS |
1161 | pci_bus_add_devices(bus); |
1162 | ||
1da177e4 LT |
1163 | /* associate pci_dev to our representation */ |
1164 | list_for_each (l, &slot->funcs) { | |
1165 | func = list_entry(l, struct acpiphp_func, sibling); | |
42f49a6a | 1166 | func->pci_dev = pci_get_slot(bus, PCI_DEVFN(slot->device, |
1da177e4 | 1167 | func->function)); |
551bcb75 MT |
1168 | if (!func->pci_dev) |
1169 | continue; | |
1170 | ||
1171 | if (func->pci_dev->hdr_type != PCI_HEADER_TYPE_BRIDGE && | |
1172 | func->pci_dev->hdr_type != PCI_HEADER_TYPE_CARDBUS) | |
1173 | continue; | |
1174 | ||
1175 | status = find_p2p_bridge(func->handle, (u32)1, bus, NULL); | |
1176 | if (ACPI_FAILURE(status)) | |
1177 | warn("find_p2p_bridge failed (error code = 0x%x)\n", | |
1178 | status); | |
1da177e4 LT |
1179 | } |
1180 | ||
1181 | slot->flags |= SLOT_ENABLED; | |
1182 | ||
1da177e4 LT |
1183 | err_exit: |
1184 | return retval; | |
1185 | } | |
1186 | ||
d5cdb672 ST |
1187 | static void disable_bridges(struct pci_bus *bus) |
1188 | { | |
1189 | struct pci_dev *dev; | |
1190 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1191 | if (dev->subordinate) { | |
1192 | disable_bridges(dev->subordinate); | |
1193 | pci_disable_device(dev); | |
1194 | } | |
1195 | } | |
1196 | } | |
1da177e4 LT |
1197 | |
1198 | /** | |
1199 | * disable_device - disable a slot | |
26e6c66e | 1200 | * @slot: ACPI PHP slot |
1da177e4 LT |
1201 | */ |
1202 | static int disable_device(struct acpiphp_slot *slot) | |
1203 | { | |
1204 | int retval = 0; | |
1205 | struct acpiphp_func *func; | |
1206 | struct list_head *l; | |
1207 | ||
1208 | /* is this slot already disabled? */ | |
1209 | if (!(slot->flags & SLOT_ENABLED)) | |
1210 | goto err_exit; | |
1211 | ||
1212 | list_for_each (l, &slot->funcs) { | |
1213 | func = list_entry(l, struct acpiphp_func, sibling); | |
92c9be95 | 1214 | |
551bcb75 MT |
1215 | if (func->bridge) { |
1216 | /* cleanup p2p bridges under this P2P bridge */ | |
1217 | cleanup_p2p_bridge(func->bridge->handle, | |
1218 | (u32)1, NULL, NULL); | |
1219 | func->bridge = NULL; | |
1220 | } | |
1221 | ||
d5cdb672 | 1222 | if (func->pci_dev) { |
0dad3510 | 1223 | pci_stop_bus_device(func->pci_dev); |
d5cdb672 ST |
1224 | if (func->pci_dev->subordinate) { |
1225 | disable_bridges(func->pci_dev->subordinate); | |
1226 | pci_disable_device(func->pci_dev); | |
1227 | } | |
1228 | } | |
600812ec ST |
1229 | } |
1230 | ||
1231 | list_for_each (l, &slot->funcs) { | |
1232 | func = list_entry(l, struct acpiphp_func, sibling); | |
0dad3510 | 1233 | |
600812ec | 1234 | acpiphp_unconfigure_ioapics(func->handle); |
92c9be95 MT |
1235 | acpiphp_bus_trim(func->handle); |
1236 | /* try to remove anyway. | |
1237 | * acpiphp_bus_add might have been failed */ | |
1238 | ||
42f49a6a RS |
1239 | if (!func->pci_dev) |
1240 | continue; | |
1da177e4 | 1241 | |
42f49a6a RS |
1242 | pci_remove_bus_device(func->pci_dev); |
1243 | pci_dev_put(func->pci_dev); | |
1244 | func->pci_dev = NULL; | |
1da177e4 LT |
1245 | } |
1246 | ||
1247 | slot->flags &= (~SLOT_ENABLED); | |
1248 | ||
1249 | err_exit: | |
1250 | return retval; | |
1251 | } | |
1252 | ||
1253 | ||
1254 | /** | |
1255 | * get_slot_status - get ACPI slot status | |
26e6c66e | 1256 | * @slot: ACPI PHP slot |
1da177e4 | 1257 | * |
26e6c66e RD |
1258 | * If a slot has _STA for each function and if any one of them |
1259 | * returned non-zero status, return it. | |
1da177e4 | 1260 | * |
26e6c66e RD |
1261 | * If a slot doesn't have _STA and if any one of its functions' |
1262 | * configuration space is configured, return 0x0f as a _STA. | |
1da177e4 | 1263 | * |
26e6c66e | 1264 | * Otherwise return 0. |
1da177e4 LT |
1265 | */ |
1266 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
1267 | { | |
1268 | acpi_status status; | |
27663c58 | 1269 | unsigned long long sta = 0; |
1da177e4 LT |
1270 | u32 dvid; |
1271 | struct list_head *l; | |
1272 | struct acpiphp_func *func; | |
1273 | ||
1274 | list_for_each (l, &slot->funcs) { | |
1275 | func = list_entry(l, struct acpiphp_func, sibling); | |
1276 | ||
1277 | if (func->flags & FUNC_HAS_STA) { | |
1278 | status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); | |
1279 | if (ACPI_SUCCESS(status) && sta) | |
1280 | break; | |
1281 | } else { | |
1282 | pci_bus_read_config_dword(slot->bridge->pci_bus, | |
1283 | PCI_DEVFN(slot->device, | |
1284 | func->function), | |
1285 | PCI_VENDOR_ID, &dvid); | |
1286 | if (dvid != 0xffffffff) { | |
1287 | sta = ACPI_STA_ALL; | |
1288 | break; | |
1289 | } | |
1290 | } | |
1291 | } | |
1292 | ||
1293 | return (unsigned int)sta; | |
1294 | } | |
1295 | ||
8d50e332 RS |
1296 | /** |
1297 | * acpiphp_eject_slot - physically eject the slot | |
26e6c66e | 1298 | * @slot: ACPI PHP slot |
8d50e332 | 1299 | */ |
bfceafc5 | 1300 | int acpiphp_eject_slot(struct acpiphp_slot *slot) |
8d50e332 RS |
1301 | { |
1302 | acpi_status status; | |
1303 | struct acpiphp_func *func; | |
1304 | struct list_head *l; | |
1305 | struct acpi_object_list arg_list; | |
1306 | union acpi_object arg; | |
1307 | ||
1308 | list_for_each (l, &slot->funcs) { | |
1309 | func = list_entry(l, struct acpiphp_func, sibling); | |
1310 | ||
1311 | /* We don't want to call _EJ0 on non-existing functions. */ | |
1312 | if ((func->flags & FUNC_HAS_EJ0)) { | |
1313 | /* _EJ0 method take one argument */ | |
1314 | arg_list.count = 1; | |
1315 | arg_list.pointer = &arg; | |
1316 | arg.type = ACPI_TYPE_INTEGER; | |
1317 | arg.integer.value = 1; | |
1318 | ||
1319 | status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); | |
1320 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 1321 | warn("%s: _EJ0 failed\n", __func__); |
8d50e332 RS |
1322 | return -1; |
1323 | } else | |
1324 | break; | |
1325 | } | |
1326 | } | |
1327 | return 0; | |
1328 | } | |
1329 | ||
1da177e4 LT |
1330 | /** |
1331 | * acpiphp_check_bridge - re-enumerate devices | |
26e6c66e | 1332 | * @bridge: where to begin re-enumeration |
1da177e4 LT |
1333 | * |
1334 | * Iterate over all slots under this bridge and make sure that if a | |
1335 | * card is present they are enabled, and if not they are disabled. | |
1336 | */ | |
1337 | static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) | |
1338 | { | |
1339 | struct acpiphp_slot *slot; | |
1340 | int retval = 0; | |
1341 | int enabled, disabled; | |
1342 | ||
1343 | enabled = disabled = 0; | |
1344 | ||
1345 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1346 | unsigned int status = get_slot_status(slot); | |
1347 | if (slot->flags & SLOT_ENABLED) { | |
1348 | if (status == ACPI_STA_ALL) | |
1349 | continue; | |
1350 | retval = acpiphp_disable_slot(slot); | |
1351 | if (retval) { | |
1352 | err("Error occurred in disabling\n"); | |
1353 | goto err_exit; | |
8d50e332 RS |
1354 | } else { |
1355 | acpiphp_eject_slot(slot); | |
1da177e4 LT |
1356 | } |
1357 | disabled++; | |
1358 | } else { | |
1359 | if (status != ACPI_STA_ALL) | |
1360 | continue; | |
1361 | retval = acpiphp_enable_slot(slot); | |
1362 | if (retval) { | |
1363 | err("Error occurred in enabling\n"); | |
1364 | goto err_exit; | |
1365 | } | |
1366 | enabled++; | |
1367 | } | |
1368 | } | |
1369 | ||
66bef8c0 | 1370 | dbg("%s: %d enabled, %d disabled\n", __func__, enabled, disabled); |
1da177e4 LT |
1371 | |
1372 | err_exit: | |
1373 | return retval; | |
1374 | } | |
1375 | ||
8e7561cf RS |
1376 | static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge) |
1377 | { | |
1378 | u16 pci_cmd, pci_bctl; | |
1379 | struct pci_dev *cdev; | |
1380 | ||
1381 | /* Program hpp values for this device */ | |
1382 | if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL || | |
1383 | (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE && | |
1384 | (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI))) | |
1385 | return; | |
e22b7350 | 1386 | |
9ef2241b GH |
1387 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST) |
1388 | return; | |
1389 | ||
8e7561cf | 1390 | pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, |
e22b7350 | 1391 | bridge->hpp.t0->cache_line_size); |
8e7561cf | 1392 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, |
e22b7350 | 1393 | bridge->hpp.t0->latency_timer); |
8e7561cf | 1394 | pci_read_config_word(dev, PCI_COMMAND, &pci_cmd); |
e22b7350 | 1395 | if (bridge->hpp.t0->enable_serr) |
8e7561cf RS |
1396 | pci_cmd |= PCI_COMMAND_SERR; |
1397 | else | |
1398 | pci_cmd &= ~PCI_COMMAND_SERR; | |
e22b7350 | 1399 | if (bridge->hpp.t0->enable_perr) |
8e7561cf RS |
1400 | pci_cmd |= PCI_COMMAND_PARITY; |
1401 | else | |
1402 | pci_cmd &= ~PCI_COMMAND_PARITY; | |
1403 | pci_write_config_word(dev, PCI_COMMAND, pci_cmd); | |
1404 | ||
1405 | /* Program bridge control value and child devices */ | |
1406 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { | |
1407 | pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, | |
e22b7350 | 1408 | bridge->hpp.t0->latency_timer); |
8e7561cf | 1409 | pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl); |
e22b7350 | 1410 | if (bridge->hpp.t0->enable_serr) |
8e7561cf RS |
1411 | pci_bctl |= PCI_BRIDGE_CTL_SERR; |
1412 | else | |
1413 | pci_bctl &= ~PCI_BRIDGE_CTL_SERR; | |
e22b7350 | 1414 | if (bridge->hpp.t0->enable_perr) |
8e7561cf RS |
1415 | pci_bctl |= PCI_BRIDGE_CTL_PARITY; |
1416 | else | |
1417 | pci_bctl &= ~PCI_BRIDGE_CTL_PARITY; | |
1418 | pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl); | |
1419 | if (dev->subordinate) { | |
1420 | list_for_each_entry(cdev, &dev->subordinate->devices, | |
1421 | bus_list) | |
1422 | program_hpp(cdev, bridge); | |
1423 | } | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus) | |
1428 | { | |
1429 | struct acpiphp_bridge bridge; | |
1430 | struct pci_dev *dev; | |
1431 | ||
1432 | memset(&bridge, 0, sizeof(bridge)); | |
1433 | bridge.handle = handle; | |
7430e34c | 1434 | bridge.pci_bus = bus; |
783c49fc | 1435 | bridge.pci_dev = bus->self; |
8e7561cf RS |
1436 | decode_hpp(&bridge); |
1437 | list_for_each_entry(dev, &bus->devices, bus_list) | |
1438 | program_hpp(dev, &bridge); | |
1439 | ||
1440 | } | |
1441 | ||
1442 | /* | |
1443 | * Remove devices for which we could not assign resources, call | |
1444 | * arch specific code to fix-up the bus | |
1445 | */ | |
1446 | static void acpiphp_sanitize_bus(struct pci_bus *bus) | |
1447 | { | |
1448 | struct pci_dev *dev; | |
1449 | int i; | |
1450 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; | |
1451 | ||
1452 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1453 | for (i=0; i<PCI_BRIDGE_RESOURCES; i++) { | |
1454 | struct resource *res = &dev->resource[i]; | |
1455 | if ((res->flags & type_mask) && !res->start && | |
1456 | res->end) { | |
1457 | /* Could not assign a required resources | |
1458 | * for this device, remove it */ | |
1459 | pci_remove_bus_device(dev); | |
1460 | break; | |
1461 | } | |
1462 | } | |
1463 | } | |
1464 | } | |
1465 | ||
1466 | /* Program resources in newly inserted bridge */ | |
1467 | static int acpiphp_configure_bridge (acpi_handle handle) | |
1468 | { | |
1469 | struct acpi_pci_id pci_id; | |
1470 | struct pci_bus *bus; | |
1471 | ||
1472 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &pci_id))) { | |
1473 | err("cannot get PCI domain and bus number for bridge\n"); | |
1474 | return -EINVAL; | |
1475 | } | |
1476 | bus = pci_find_bus(pci_id.segment, pci_id.bus); | |
1477 | if (!bus) { | |
1478 | err("cannot find bus %d:%d\n", | |
1479 | pci_id.segment, pci_id.bus); | |
1480 | return -EINVAL; | |
1481 | } | |
1482 | ||
1483 | pci_bus_size_bridges(bus); | |
1484 | pci_bus_assign_resources(bus); | |
1485 | acpiphp_sanitize_bus(bus); | |
1486 | acpiphp_set_hpp_values(handle, bus); | |
1487 | pci_enable_bridges(bus); | |
a0d399a8 | 1488 | acpiphp_configure_ioapics(handle); |
8e7561cf RS |
1489 | return 0; |
1490 | } | |
1491 | ||
1492 | static void handle_bridge_insertion(acpi_handle handle, u32 type) | |
1493 | { | |
1494 | struct acpi_device *device, *pdevice; | |
1495 | acpi_handle phandle; | |
1496 | ||
1497 | if ((type != ACPI_NOTIFY_BUS_CHECK) && | |
1498 | (type != ACPI_NOTIFY_DEVICE_CHECK)) { | |
1499 | err("unexpected notification type %d\n", type); | |
1500 | return; | |
1501 | } | |
1502 | ||
1503 | acpi_get_parent(handle, &phandle); | |
1504 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1505 | dbg("no parent device, assuming NULL\n"); | |
1506 | pdevice = NULL; | |
1507 | } | |
1508 | if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) { | |
1509 | err("cannot add bridge to acpi list\n"); | |
1510 | return; | |
1511 | } | |
1512 | if (!acpiphp_configure_bridge(handle) && | |
1513 | !acpi_bus_start(device)) | |
1514 | add_bridge(handle); | |
1515 | else | |
1516 | err("cannot configure and start bridge\n"); | |
1517 | ||
1518 | } | |
1519 | ||
1da177e4 LT |
1520 | /* |
1521 | * ACPI event handlers | |
1522 | */ | |
1523 | ||
0bbd6424 GH |
1524 | static acpi_status |
1525 | count_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1526 | { | |
1527 | int *count = (int *)context; | |
1528 | struct acpiphp_bridge *bridge; | |
1529 | ||
1530 | bridge = acpiphp_handle_to_bridge(handle); | |
1531 | if (bridge) | |
1532 | (*count)++; | |
1533 | return AE_OK ; | |
1534 | } | |
1535 | ||
1536 | static acpi_status | |
1537 | check_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1538 | { | |
1539 | struct acpiphp_bridge *bridge; | |
1540 | char objname[64]; | |
1541 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1542 | .pointer = objname }; | |
1543 | ||
1544 | bridge = acpiphp_handle_to_bridge(handle); | |
1545 | if (bridge) { | |
1546 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1547 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1548 | __func__, objname); |
0bbd6424 GH |
1549 | acpiphp_check_bridge(bridge); |
1550 | } | |
1551 | return AE_OK ; | |
1552 | } | |
1553 | ||
1da177e4 LT |
1554 | /** |
1555 | * handle_hotplug_event_bridge - handle ACPI event on bridges | |
1da177e4 LT |
1556 | * @handle: Notify()'ed acpi_handle |
1557 | * @type: Notify code | |
1558 | * @context: pointer to acpiphp_bridge structure | |
1559 | * | |
26e6c66e | 1560 | * Handles ACPI event notification on {host,p2p} bridges. |
1da177e4 LT |
1561 | */ |
1562 | static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context) | |
1563 | { | |
1564 | struct acpiphp_bridge *bridge; | |
1565 | char objname[64]; | |
1566 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1567 | .pointer = objname }; | |
8e7561cf | 1568 | struct acpi_device *device; |
0bbd6424 | 1569 | int num_sub_bridges = 0; |
1da177e4 | 1570 | |
8e7561cf RS |
1571 | if (acpi_bus_get_device(handle, &device)) { |
1572 | /* This bridge must have just been physically inserted */ | |
1573 | handle_bridge_insertion(handle, type); | |
1574 | return; | |
1575 | } | |
1576 | ||
1577 | bridge = acpiphp_handle_to_bridge(handle); | |
0bbd6424 GH |
1578 | if (type == ACPI_NOTIFY_BUS_CHECK) { |
1579 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, ACPI_UINT32_MAX, | |
1580 | count_sub_bridges, &num_sub_bridges, NULL); | |
1581 | } | |
1582 | ||
1583 | if (!bridge && !num_sub_bridges) { | |
8e7561cf RS |
1584 | err("cannot get bridge info\n"); |
1585 | return; | |
1586 | } | |
1da177e4 LT |
1587 | |
1588 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1589 | ||
1590 | switch (type) { | |
1591 | case ACPI_NOTIFY_BUS_CHECK: | |
1592 | /* bus re-enumerate */ | |
66bef8c0 | 1593 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
0bbd6424 GH |
1594 | if (bridge) { |
1595 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1596 | __func__, objname); |
0bbd6424 GH |
1597 | acpiphp_check_bridge(bridge); |
1598 | } | |
1599 | if (num_sub_bridges) | |
1600 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
1601 | ACPI_UINT32_MAX, check_sub_bridges, NULL, NULL); | |
1da177e4 LT |
1602 | break; |
1603 | ||
1604 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1605 | /* device check */ | |
66bef8c0 | 1606 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1607 | acpiphp_check_bridge(bridge); |
1608 | break; | |
1609 | ||
1610 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1611 | /* wake event */ | |
66bef8c0 | 1612 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1613 | break; |
1614 | ||
1615 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1616 | /* request device eject */ | |
66bef8c0 | 1617 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
551bcb75 MT |
1618 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
1619 | (bridge->flags & BRIDGE_HAS_EJ0)) { | |
1620 | struct acpiphp_slot *slot; | |
1621 | slot = bridge->func->slot; | |
1622 | if (!acpiphp_disable_slot(slot)) | |
1623 | acpiphp_eject_slot(slot); | |
1624 | } | |
1da177e4 LT |
1625 | break; |
1626 | ||
1627 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1628 | printk(KERN_ERR "Device %s cannot be configured due" | |
1629 | " to a frequency mismatch\n", objname); | |
1630 | break; | |
1631 | ||
1632 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1633 | printk(KERN_ERR "Device %s cannot be configured due" | |
1634 | " to a bus mode mismatch\n", objname); | |
1635 | break; | |
1636 | ||
1637 | case ACPI_NOTIFY_POWER_FAULT: | |
1638 | printk(KERN_ERR "Device %s has suffered a power fault\n", | |
1639 | objname); | |
1640 | break; | |
1641 | ||
1642 | default: | |
1643 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1644 | break; | |
1645 | } | |
1646 | } | |
1647 | ||
1da177e4 LT |
1648 | /** |
1649 | * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) | |
1da177e4 LT |
1650 | * @handle: Notify()'ed acpi_handle |
1651 | * @type: Notify code | |
1652 | * @context: pointer to acpiphp_func structure | |
1653 | * | |
26e6c66e | 1654 | * Handles ACPI event notification on slots. |
1da177e4 | 1655 | */ |
2b85e130 | 1656 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) |
1da177e4 LT |
1657 | { |
1658 | struct acpiphp_func *func; | |
1659 | char objname[64]; | |
1660 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1661 | .pointer = objname }; | |
1662 | ||
1663 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1664 | ||
1665 | func = (struct acpiphp_func *)context; | |
1666 | ||
1667 | switch (type) { | |
1668 | case ACPI_NOTIFY_BUS_CHECK: | |
1669 | /* bus re-enumerate */ | |
66bef8c0 | 1670 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
1da177e4 LT |
1671 | acpiphp_enable_slot(func->slot); |
1672 | break; | |
1673 | ||
1674 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1675 | /* device check : re-enumerate from parent bus */ | |
66bef8c0 | 1676 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1677 | acpiphp_check_bridge(func->slot->bridge); |
1678 | break; | |
1679 | ||
1680 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1681 | /* wake event */ | |
66bef8c0 | 1682 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1683 | break; |
1684 | ||
1685 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1686 | /* request device eject */ | |
66bef8c0 | 1687 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
8d50e332 RS |
1688 | if (!(acpiphp_disable_slot(func->slot))) |
1689 | acpiphp_eject_slot(func->slot); | |
1da177e4 LT |
1690 | break; |
1691 | ||
1692 | default: | |
1693 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1694 | break; | |
1695 | } | |
1696 | } | |
1697 | ||
8e7561cf RS |
1698 | |
1699 | static acpi_status | |
1700 | find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1701 | { | |
1702 | int *count = (int *)context; | |
1703 | ||
783c49fc | 1704 | if (acpi_root_bridge(handle)) { |
8e7561cf RS |
1705 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1706 | handle_hotplug_event_bridge, NULL); | |
1707 | (*count)++; | |
1708 | } | |
1709 | return AE_OK ; | |
1710 | } | |
1da177e4 LT |
1711 | |
1712 | static struct acpi_pci_driver acpi_pci_hp_driver = { | |
1713 | .add = add_bridge, | |
1714 | .remove = remove_bridge, | |
1715 | }; | |
1716 | ||
1717 | /** | |
1718 | * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures | |
1da177e4 LT |
1719 | */ |
1720 | int __init acpiphp_glue_init(void) | |
1721 | { | |
8e7561cf | 1722 | int num = 0; |
1da177e4 | 1723 | |
8e7561cf RS |
1724 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
1725 | ACPI_UINT32_MAX, find_root_bridges, &num, NULL); | |
1da177e4 LT |
1726 | |
1727 | if (num <= 0) | |
1728 | return -1; | |
8e7561cf RS |
1729 | else |
1730 | acpi_pci_register_driver(&acpi_pci_hp_driver); | |
1da177e4 LT |
1731 | |
1732 | return 0; | |
1733 | } | |
1734 | ||
1735 | ||
1736 | /** | |
1737 | * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures | |
1738 | * | |
26e6c66e | 1739 | * This function frees all data allocated in acpiphp_glue_init(). |
1da177e4 | 1740 | */ |
031f30d2 | 1741 | void acpiphp_glue_exit(void) |
1da177e4 | 1742 | { |
1da177e4 LT |
1743 | acpi_pci_unregister_driver(&acpi_pci_hp_driver); |
1744 | } | |
1745 | ||
1746 | ||
1747 | /** | |
1748 | * acpiphp_get_num_slots - count number of slots in a system | |
1749 | */ | |
1750 | int __init acpiphp_get_num_slots(void) | |
1751 | { | |
1da177e4 | 1752 | struct acpiphp_bridge *bridge; |
467c442f | 1753 | int num_slots = 0; |
1da177e4 | 1754 | |
467c442f | 1755 | list_for_each_entry (bridge, &bridge_list, list) { |
42f49a6a RS |
1756 | dbg("Bus %04x:%02x has %d slot%s\n", |
1757 | pci_domain_nr(bridge->pci_bus), | |
1758 | bridge->pci_bus->number, bridge->nr_slots, | |
1759 | bridge->nr_slots == 1 ? "" : "s"); | |
1da177e4 LT |
1760 | num_slots += bridge->nr_slots; |
1761 | } | |
1762 | ||
42f49a6a | 1763 | dbg("Total %d slots\n", num_slots); |
1da177e4 LT |
1764 | return num_slots; |
1765 | } | |
1766 | ||
1767 | ||
1768 | #if 0 | |
1769 | /** | |
1770 | * acpiphp_for_each_slot - call function for each slot | |
1771 | * @fn: callback function | |
1772 | * @data: context to be passed to callback function | |
1da177e4 LT |
1773 | */ |
1774 | static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) | |
1775 | { | |
1776 | struct list_head *node; | |
1777 | struct acpiphp_bridge *bridge; | |
1778 | struct acpiphp_slot *slot; | |
1779 | int retval = 0; | |
1780 | ||
1781 | list_for_each (node, &bridge_list) { | |
1782 | bridge = (struct acpiphp_bridge *)node; | |
1783 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1784 | retval = fn(slot, data); | |
1785 | if (!retval) | |
1786 | goto err_exit; | |
1787 | } | |
1788 | } | |
1789 | ||
1790 | err_exit: | |
1791 | return retval; | |
1792 | } | |
1793 | #endif | |
1794 | ||
1da177e4 LT |
1795 | |
1796 | /** | |
1797 | * acpiphp_enable_slot - power on slot | |
26e6c66e | 1798 | * @slot: ACPI PHP slot |
1da177e4 LT |
1799 | */ |
1800 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
1801 | { | |
1802 | int retval; | |
1803 | ||
6aa4cdd0 | 1804 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1805 | |
1806 | /* wake up all functions */ | |
1807 | retval = power_on_slot(slot); | |
1808 | if (retval) | |
1809 | goto err_exit; | |
1810 | ||
cde0e5d7 | 1811 | if (get_slot_status(slot) == ACPI_STA_ALL) { |
1da177e4 LT |
1812 | /* configure all functions */ |
1813 | retval = enable_device(slot); | |
cde0e5d7 MT |
1814 | if (retval) |
1815 | power_off_slot(slot); | |
1816 | } else { | |
66bef8c0 | 1817 | dbg("%s: Slot status is not ACPI_STA_ALL\n", __func__); |
cde0e5d7 MT |
1818 | power_off_slot(slot); |
1819 | } | |
1da177e4 LT |
1820 | |
1821 | err_exit: | |
6aa4cdd0 | 1822 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1823 | return retval; |
1824 | } | |
1825 | ||
1da177e4 LT |
1826 | /** |
1827 | * acpiphp_disable_slot - power off slot | |
26e6c66e | 1828 | * @slot: ACPI PHP slot |
1da177e4 LT |
1829 | */ |
1830 | int acpiphp_disable_slot(struct acpiphp_slot *slot) | |
1831 | { | |
1832 | int retval = 0; | |
1833 | ||
6aa4cdd0 | 1834 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1835 | |
1836 | /* unconfigure all functions */ | |
1837 | retval = disable_device(slot); | |
1838 | if (retval) | |
1839 | goto err_exit; | |
1840 | ||
1841 | /* power off all functions */ | |
1842 | retval = power_off_slot(slot); | |
1843 | if (retval) | |
1844 | goto err_exit; | |
1845 | ||
1da177e4 | 1846 | err_exit: |
6aa4cdd0 | 1847 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1848 | return retval; |
1849 | } | |
1850 | ||
1851 | ||
1852 | /* | |
1853 | * slot enabled: 1 | |
1854 | * slot disabled: 0 | |
1855 | */ | |
1856 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
1857 | { | |
8d50e332 | 1858 | return (slot->flags & SLOT_POWEREDON); |
1da177e4 LT |
1859 | } |
1860 | ||
1861 | ||
1862 | /* | |
35ae61a0 MT |
1863 | * latch open: 1 |
1864 | * latch closed: 0 | |
1da177e4 LT |
1865 | */ |
1866 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1867 | { | |
1868 | unsigned int sta; | |
1869 | ||
1870 | sta = get_slot_status(slot); | |
1871 | ||
35ae61a0 | 1872 | return (sta & ACPI_STA_SHOW_IN_UI) ? 0 : 1; |
1da177e4 LT |
1873 | } |
1874 | ||
1875 | ||
1876 | /* | |
1877 | * adapter presence : 1 | |
1878 | * absence : 0 | |
1879 | */ | |
1880 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1881 | { | |
1882 | unsigned int sta; | |
1883 | ||
1884 | sta = get_slot_status(slot); | |
1885 | ||
1886 | return (sta == 0) ? 0 : 1; | |
1887 | } |