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: | |
42f49a6a RS |
35 | * - The one in acpiphp_bridge has its refcount elevated by pci_get_slot() |
36 | * when the bridge is scanned and it loses a refcount when the bridge | |
37 | * is removed. | |
5d4a4b25 AC |
38 | * - When a P2P bridge is present, we elevate the refcount on the subordinate |
39 | * bus. It loses the refcount when the the driver unloads. | |
42f49a6a RS |
40 | */ |
41 | ||
bd950799 LT |
42 | #define pr_fmt(fmt) "acpiphp_glue: " fmt |
43 | ||
1da177e4 LT |
44 | #include <linux/module.h> |
45 | ||
46 | #include <linux/kernel.h> | |
47 | #include <linux/pci.h> | |
7a54f25c | 48 | #include <linux/pci_hotplug.h> |
e8c331e9 | 49 | #include <linux/pci-acpi.h> |
4ebe3450 | 50 | #include <linux/pm_runtime.h> |
6aa4cdd0 | 51 | #include <linux/mutex.h> |
5a0e3ad6 | 52 | #include <linux/slab.h> |
6af8bef1 | 53 | #include <linux/acpi.h> |
1da177e4 LT |
54 | |
55 | #include "../pci.h" | |
1da177e4 LT |
56 | #include "acpiphp.h" |
57 | ||
58 | static LIST_HEAD(bridge_list); | |
3d54a316 | 59 | static DEFINE_MUTEX(bridge_mutex); |
1da177e4 | 60 | |
be27b3dc | 61 | static int acpiphp_hotplug_notify(struct acpi_device *adev, u32 type); |
edf5bf34 | 62 | static void acpiphp_post_dock_fixup(struct acpi_device *adev); |
8e5dce35 | 63 | static void acpiphp_sanitize_bus(struct pci_bus *bus); |
d3a1ebb0 | 64 | static void hotplug_event(u32 type, struct acpiphp_context *context); |
3d54a316 | 65 | static void free_bridge(struct kref *kref); |
8e5dce35 | 66 | |
cb7b8ced RW |
67 | /** |
68 | * acpiphp_init_context - Create hotplug context and grab a reference to it. | |
bbcbfc0e | 69 | * @adev: ACPI device object to create the context for. |
cb7b8ced | 70 | * |
e525506f | 71 | * Call under acpi_hp_context_lock. |
cb7b8ced | 72 | */ |
bbcbfc0e | 73 | static struct acpiphp_context *acpiphp_init_context(struct acpi_device *adev) |
cb7b8ced RW |
74 | { |
75 | struct acpiphp_context *context; | |
cb7b8ced RW |
76 | |
77 | context = kzalloc(sizeof(*context), GFP_KERNEL); | |
78 | if (!context) | |
79 | return NULL; | |
80 | ||
cb7b8ced | 81 | context->refcount = 1; |
ba574dc8 RW |
82 | context->hp.notify = acpiphp_hotplug_notify; |
83 | context->hp.fixup = acpiphp_post_dock_fixup; | |
84 | acpi_set_hp_context(adev, &context->hp); | |
cb7b8ced RW |
85 | return context; |
86 | } | |
87 | ||
88 | /** | |
89 | * acpiphp_get_context - Get hotplug context and grab a reference to it. | |
3c2cc7ff | 90 | * @adev: ACPI device object to get the context for. |
cb7b8ced | 91 | * |
e525506f | 92 | * Call under acpi_hp_context_lock. |
cb7b8ced | 93 | */ |
3c2cc7ff | 94 | static struct acpiphp_context *acpiphp_get_context(struct acpi_device *adev) |
cb7b8ced | 95 | { |
3c2cc7ff | 96 | struct acpiphp_context *context; |
cb7b8ced | 97 | |
3c2cc7ff RW |
98 | if (!adev->hp) |
99 | return NULL; | |
100 | ||
101 | context = to_acpiphp_context(adev->hp); | |
102 | context->refcount++; | |
cb7b8ced RW |
103 | return context; |
104 | } | |
105 | ||
106 | /** | |
107 | * acpiphp_put_context - Drop a reference to ACPI hotplug context. | |
bbcbfc0e | 108 | * @context: ACPI hotplug context to drop a reference to. |
cb7b8ced RW |
109 | * |
110 | * The context object is removed if there are no more references to it. | |
111 | * | |
e525506f | 112 | * Call under acpi_hp_context_lock. |
cb7b8ced RW |
113 | */ |
114 | static void acpiphp_put_context(struct acpiphp_context *context) | |
115 | { | |
116 | if (--context->refcount) | |
117 | return; | |
118 | ||
bd4674df | 119 | WARN_ON(context->bridge); |
3c2cc7ff | 120 | context->hp.self->hp = NULL; |
cb7b8ced RW |
121 | kfree(context); |
122 | } | |
123 | ||
3d54a316 JL |
124 | static inline void get_bridge(struct acpiphp_bridge *bridge) |
125 | { | |
126 | kref_get(&bridge->ref); | |
127 | } | |
128 | ||
129 | static inline void put_bridge(struct acpiphp_bridge *bridge) | |
130 | { | |
131 | kref_put(&bridge->ref, free_bridge); | |
132 | } | |
133 | ||
edf5bf34 RW |
134 | static struct acpiphp_context *acpiphp_grab_context(struct acpi_device *adev) |
135 | { | |
136 | struct acpiphp_context *context; | |
137 | ||
138 | acpi_lock_hp_context(); | |
139 | context = acpiphp_get_context(adev); | |
140 | if (!context || context->func.parent->is_going_away) { | |
141 | acpi_unlock_hp_context(); | |
142 | return NULL; | |
143 | } | |
144 | get_bridge(context->func.parent); | |
145 | acpiphp_put_context(context); | |
146 | acpi_unlock_hp_context(); | |
147 | return context; | |
148 | } | |
149 | ||
150 | static void acpiphp_let_context_go(struct acpiphp_context *context) | |
151 | { | |
152 | put_bridge(context->func.parent); | |
153 | } | |
154 | ||
3d54a316 JL |
155 | static void free_bridge(struct kref *kref) |
156 | { | |
cb7b8ced | 157 | struct acpiphp_context *context; |
3d54a316 JL |
158 | struct acpiphp_bridge *bridge; |
159 | struct acpiphp_slot *slot, *next; | |
160 | struct acpiphp_func *func, *tmp; | |
161 | ||
e525506f | 162 | acpi_lock_hp_context(); |
cb7b8ced | 163 | |
3d54a316 JL |
164 | bridge = container_of(kref, struct acpiphp_bridge, ref); |
165 | ||
166 | list_for_each_entry_safe(slot, next, &bridge->slots, node) { | |
bd4674df RW |
167 | list_for_each_entry_safe(func, tmp, &slot->funcs, sibling) |
168 | acpiphp_put_context(func_to_context(func)); | |
169 | ||
3d54a316 JL |
170 | kfree(slot); |
171 | } | |
172 | ||
87831273 | 173 | context = bridge->context; |
bbd34fcd RW |
174 | /* Root bridges will not have hotplug context. */ |
175 | if (context) { | |
176 | /* Release the reference taken by acpiphp_enumerate_slots(). */ | |
bda46dbb | 177 | put_bridge(context->func.parent); |
bbd34fcd RW |
178 | context->bridge = NULL; |
179 | acpiphp_put_context(context); | |
180 | } | |
cb7b8ced | 181 | |
3d54a316 JL |
182 | put_device(&bridge->pci_bus->dev); |
183 | pci_dev_put(bridge->pci_dev); | |
184 | kfree(bridge); | |
cb7b8ced | 185 | |
e525506f | 186 | acpi_unlock_hp_context(); |
3d54a316 JL |
187 | } |
188 | ||
edf5bf34 RW |
189 | /** |
190 | * acpiphp_post_dock_fixup - Post-dock fixups for PCI devices. | |
191 | * @adev: ACPI device object corresponding to a PCI device. | |
4e8662bb | 192 | * |
edf5bf34 | 193 | * TBD - figure out a way to only call fixups for systems that require them. |
4e8662bb | 194 | */ |
edf5bf34 | 195 | static void acpiphp_post_dock_fixup(struct acpi_device *adev) |
4e8662bb | 196 | { |
edf5bf34 RW |
197 | struct acpiphp_context *context = acpiphp_grab_context(adev); |
198 | struct pci_bus *bus; | |
4e8662bb KA |
199 | u32 buses; |
200 | ||
edf5bf34 | 201 | if (!context) |
f09ce741 | 202 | return; |
4e8662bb | 203 | |
edf5bf34 RW |
204 | bus = context->func.slot->bus; |
205 | if (!bus->self) | |
206 | goto out; | |
207 | ||
4e8662bb KA |
208 | /* fixup bad _DCK function that rewrites |
209 | * secondary bridge on slot | |
210 | */ | |
edf5bf34 | 211 | pci_read_config_dword(bus->self, PCI_PRIMARY_BUS, &buses); |
4e8662bb | 212 | |
b918c62e | 213 | if (((buses >> 8) & 0xff) != bus->busn_res.start) { |
4e8662bb | 214 | buses = (buses & 0xff000000) |
2a9d3521 | 215 | | ((unsigned int)(bus->primary) << 0) |
b918c62e YL |
216 | | ((unsigned int)(bus->busn_res.start) << 8) |
217 | | ((unsigned int)(bus->busn_res.end) << 16); | |
4e8662bb KA |
218 | pci_write_config_dword(bus->self, PCI_PRIMARY_BUS, buses); |
219 | } | |
4e8662bb | 220 | |
edf5bf34 RW |
221 | out: |
222 | acpiphp_let_context_go(context); | |
af9d8adc | 223 | } |
4e8662bb | 224 | |
3799c5a0 RW |
225 | /** |
226 | * acpiphp_add_context - Add ACPIPHP context to an ACPI device object. | |
227 | * @handle: ACPI handle of the object to add a context to. | |
228 | * @lvl: Not used. | |
229 | * @data: The object's parent ACPIPHP bridge. | |
230 | * @rv: Not used. | |
231 | */ | |
232 | static acpi_status acpiphp_add_context(acpi_handle handle, u32 lvl, void *data, | |
233 | void **rv) | |
1da177e4 | 234 | { |
cb7b8ced RW |
235 | struct acpiphp_bridge *bridge = data; |
236 | struct acpiphp_context *context; | |
bbcbfc0e | 237 | struct acpi_device *adev; |
1da177e4 LT |
238 | struct acpiphp_slot *slot; |
239 | struct acpiphp_func *newfunc; | |
1da177e4 | 240 | acpi_status status = AE_OK; |
bbd34fcd RW |
241 | unsigned long long adr; |
242 | int device, function; | |
e8c331e9 | 243 | struct pci_bus *pbus = bridge->pci_bus; |
bbd34fcd | 244 | struct pci_dev *pdev = bridge->pci_dev; |
3b63aaa7 | 245 | u32 val; |
1da177e4 | 246 | |
dfb117b3 BH |
247 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr); |
248 | if (ACPI_FAILURE(status)) { | |
f26ca1d6 TK |
249 | if (status != AE_NOT_FOUND) |
250 | acpi_handle_warn(handle, | |
251 | "can't evaluate _ADR (%#x)\n", status); | |
dfb117b3 BH |
252 | return AE_OK; |
253 | } | |
bbcbfc0e RW |
254 | if (acpi_bus_get_device(handle, &adev)) |
255 | return AE_OK; | |
dfb117b3 BH |
256 | |
257 | device = (adr >> 16) & 0xffff; | |
258 | function = adr & 0xffff; | |
259 | ||
e525506f | 260 | acpi_lock_hp_context(); |
bbcbfc0e | 261 | context = acpiphp_init_context(adev); |
cb7b8ced | 262 | if (!context) { |
e525506f | 263 | acpi_unlock_hp_context(); |
cb7b8ced | 264 | acpi_handle_err(handle, "No hotplug context\n"); |
cb7b8ced RW |
265 | return AE_NOT_EXIST; |
266 | } | |
bd4674df | 267 | newfunc = &context->func; |
bd4674df | 268 | newfunc->function = function; |
bda46dbb | 269 | newfunc->parent = bridge; |
edf5bf34 | 270 | acpi_unlock_hp_context(); |
cb7b8ced | 271 | |
edf5bf34 RW |
272 | /* |
273 | * If this is a dock device, its _EJ0 should be executed by the dock | |
274 | * notify handler after calling _DCK. | |
275 | */ | |
276 | if (!is_dock_device(adev) && acpi_has_method(handle, "_EJ0")) | |
20416ea5 | 277 | newfunc->flags = FUNC_HAS_EJ0; |
1da177e4 | 278 | |
ecd046da | 279 | if (acpi_has_method(handle, "_STA")) |
1da177e4 LT |
280 | newfunc->flags |= FUNC_HAS_STA; |
281 | ||
1da177e4 | 282 | /* search for objects that share the same slot */ |
ad41dd9d | 283 | list_for_each_entry(slot, &bridge->slots, node) |
bbd34fcd | 284 | if (slot->device == device) |
ac372338 | 285 | goto slot_found; |
1da177e4 | 286 | |
ac372338 RW |
287 | slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); |
288 | if (!slot) { | |
e525506f | 289 | acpi_lock_hp_context(); |
146fc68a | 290 | acpiphp_put_context(context); |
e525506f | 291 | acpi_unlock_hp_context(); |
146fc68a | 292 | return AE_NO_MEMORY; |
ac372338 RW |
293 | } |
294 | ||
bda46dbb | 295 | slot->bus = bridge->pci_bus; |
ac372338 | 296 | slot->device = device; |
ac372338 | 297 | INIT_LIST_HEAD(&slot->funcs); |
ac372338 | 298 | |
ac372338 | 299 | list_add_tail(&slot->node, &bridge->slots); |
1da177e4 | 300 | |
cc6254e0 RW |
301 | /* |
302 | * Expose slots to user space for functions that have _EJ0 or _RMV or | |
303 | * are located in dock stations. Do not expose them for devices handled | |
304 | * by the native PCIe hotplug (PCIeHP), becuase that code is supposed to | |
305 | * expose slots to user space in those cases. | |
306 | */ | |
3b52b21f | 307 | if ((acpi_pci_check_ejectable(pbus, handle) || is_dock_device(adev)) |
437eb7bf | 308 | && !(pdev && pdev->is_hotplug_bridge && pciehp_is_native(pdev))) { |
bbd34fcd RW |
309 | unsigned long long sun; |
310 | int retval; | |
ac372338 | 311 | |
bbd34fcd RW |
312 | bridge->nr_slots++; |
313 | status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); | |
314 | if (ACPI_FAILURE(status)) | |
315 | sun = bridge->nr_slots; | |
316 | ||
bd950799 | 317 | pr_debug("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n", |
7342798d | 318 | sun, pci_domain_nr(pbus), pbus->number, device); |
bbd34fcd | 319 | |
7342798d | 320 | retval = acpiphp_register_hotplug_slot(slot, sun); |
bbd34fcd | 321 | if (retval) { |
1aaac071 | 322 | slot->slot = NULL; |
bbd34fcd RW |
323 | bridge->nr_slots--; |
324 | if (retval == -EBUSY) | |
227f0647 | 325 | pr_warn("Slot %llu already registered by another hotplug driver\n", sun); |
bbd34fcd | 326 | else |
227f0647 | 327 | pr_warn("acpiphp_register_hotplug_slot failed (err code = 0x%x)\n", retval); |
bbd34fcd RW |
328 | } |
329 | /* Even if the slot registration fails, we can still use it. */ | |
1da177e4 LT |
330 | } |
331 | ||
ac372338 | 332 | slot_found: |
1da177e4 LT |
333 | newfunc->slot = slot; |
334 | list_add_tail(&newfunc->sibling, &slot->funcs); | |
335 | ||
3b63aaa7 JL |
336 | if (pci_bus_read_dev_vendor_id(pbus, PCI_DEVFN(device, function), |
337 | &val, 60*1000)) | |
bc805a55 | 338 | slot->flags |= SLOT_ENABLED; |
1da177e4 | 339 | |
2e862c51 | 340 | return AE_OK; |
1da177e4 LT |
341 | } |
342 | ||
364d5094 | 343 | static void cleanup_bridge(struct acpiphp_bridge *bridge) |
1da177e4 | 344 | { |
3d54a316 JL |
345 | struct acpiphp_slot *slot; |
346 | struct acpiphp_func *func; | |
42f49a6a | 347 | |
3d54a316 JL |
348 | list_for_each_entry(slot, &bridge->slots, node) { |
349 | list_for_each_entry(func, &slot->funcs, sibling) { | |
1a699476 | 350 | struct acpi_device *adev = func_to_acpi_device(func); |
5a3bc573 | 351 | |
1a699476 | 352 | acpi_lock_hp_context(); |
be27b3dc | 353 | adev->hp->notify = NULL; |
edf5bf34 | 354 | adev->hp->fixup = NULL; |
1a699476 | 355 | acpi_unlock_hp_context(); |
42f49a6a | 356 | } |
9217a984 | 357 | slot->flags |= SLOT_IS_GOING_AWAY; |
1aaac071 RW |
358 | if (slot->slot) |
359 | acpiphp_unregister_hotplug_slot(slot); | |
42f49a6a RS |
360 | } |
361 | ||
3d54a316 | 362 | mutex_lock(&bridge_mutex); |
42f49a6a | 363 | list_del(&bridge->list); |
3d54a316 | 364 | mutex_unlock(&bridge_mutex); |
9217a984 | 365 | |
e525506f | 366 | acpi_lock_hp_context(); |
9217a984 | 367 | bridge->is_going_away = true; |
e525506f | 368 | acpi_unlock_hp_context(); |
1da177e4 LT |
369 | } |
370 | ||
15a1ae74 | 371 | /** |
26e6c66e | 372 | * acpiphp_max_busnr - return the highest reserved bus number under the given bus. |
15a1ae74 | 373 | * @bus: bus to start search with |
15a1ae74 KA |
374 | */ |
375 | static unsigned char acpiphp_max_busnr(struct pci_bus *bus) | |
376 | { | |
c6f0d5ad | 377 | struct pci_bus *tmp; |
15a1ae74 KA |
378 | unsigned char max, n; |
379 | ||
380 | /* | |
381 | * pci_bus_max_busnr will return the highest | |
382 | * reserved busnr for all these children. | |
383 | * that is equivalent to the bus->subordinate | |
384 | * value. We don't want to use the parent's | |
385 | * bus->subordinate value because it could have | |
386 | * padding in it. | |
387 | */ | |
b918c62e | 388 | max = bus->busn_res.start; |
15a1ae74 | 389 | |
c6f0d5ad YW |
390 | list_for_each_entry(tmp, &bus->children, node) { |
391 | n = pci_bus_max_busnr(tmp); | |
15a1ae74 KA |
392 | if (n > max) |
393 | max = n; | |
394 | } | |
395 | return max; | |
396 | } | |
397 | ||
d0607050 SL |
398 | static void acpiphp_set_acpi_region(struct acpiphp_slot *slot) |
399 | { | |
400 | struct acpiphp_func *func; | |
401 | union acpi_object params[2]; | |
402 | struct acpi_object_list arg_list; | |
403 | ||
404 | list_for_each_entry(func, &slot->funcs, sibling) { | |
405 | arg_list.count = 2; | |
406 | arg_list.pointer = params; | |
407 | params[0].type = ACPI_TYPE_INTEGER; | |
408 | params[0].integer.value = ACPI_ADR_SPACE_PCI_CONFIG; | |
409 | params[1].type = ACPI_TYPE_INTEGER; | |
410 | params[1].integer.value = 1; | |
411 | /* _REG is optional, we don't care about if there is failure */ | |
5a3bc573 RW |
412 | acpi_evaluate_object(func_to_handle(func), "_REG", &arg_list, |
413 | NULL); | |
d0607050 SL |
414 | } |
415 | } | |
416 | ||
1f96a965 YL |
417 | static void check_hotplug_bridge(struct acpiphp_slot *slot, struct pci_dev *dev) |
418 | { | |
419 | struct acpiphp_func *func; | |
420 | ||
1f96a965 YL |
421 | /* quirk, or pcie could set it already */ |
422 | if (dev->is_hotplug_bridge) | |
423 | return; | |
424 | ||
1f96a965 YL |
425 | list_for_each_entry(func, &slot->funcs, sibling) { |
426 | if (PCI_FUNC(dev->devfn) == func->function) { | |
bbd34fcd | 427 | dev->is_hotplug_bridge = 1; |
1f96a965 YL |
428 | break; |
429 | } | |
430 | } | |
431 | } | |
3b63aaa7 | 432 | |
a47d8c8e RW |
433 | static int acpiphp_rescan_slot(struct acpiphp_slot *slot) |
434 | { | |
435 | struct acpiphp_func *func; | |
436 | ||
b6708fbf RW |
437 | list_for_each_entry(func, &slot->funcs, sibling) { |
438 | struct acpi_device *adev = func_to_acpi_device(func); | |
a47d8c8e | 439 | |
b6708fbf RW |
440 | acpi_bus_scan(adev->handle); |
441 | if (acpi_device_enumerated(adev)) | |
442 | acpi_device_set_power(adev, ACPI_STATE_D0); | |
443 | } | |
a47d8c8e RW |
444 | return pci_scan_slot(slot->bus, PCI_DEVFN(slot->device, 0)); |
445 | } | |
446 | ||
1da177e4 | 447 | /** |
a1d0abce | 448 | * enable_slot - enable, configure a slot |
1da177e4 LT |
449 | * @slot: slot to be enabled |
450 | * | |
451 | * This function should be called per *physical slot*, | |
452 | * not per each slot object in ACPI namespace. | |
1da177e4 | 453 | */ |
10874f5a | 454 | static void enable_slot(struct acpiphp_slot *slot) |
1da177e4 | 455 | { |
1da177e4 | 456 | struct pci_dev *dev; |
bda46dbb | 457 | struct pci_bus *bus = slot->bus; |
1da177e4 | 458 | struct acpiphp_func *func; |
b91182a6 | 459 | int max, pass; |
d66ecb72 | 460 | LIST_HEAD(add_list); |
1da177e4 | 461 | |
ab122590 | 462 | acpiphp_rescan_slot(slot); |
15a1ae74 | 463 | max = acpiphp_max_busnr(bus); |
42f49a6a | 464 | for (pass = 0; pass < 2; pass++) { |
24a0c654 | 465 | for_each_pci_bridge(dev, bus) { |
42f49a6a RS |
466 | if (PCI_SLOT(dev->devfn) != slot->device) |
467 | continue; | |
a1d0abce | 468 | |
24a0c654 AS |
469 | max = pci_scan_bridge(bus, dev, max, pass); |
470 | if (pass && dev->subordinate) { | |
471 | check_hotplug_bridge(slot, dev); | |
472 | pcibios_resource_survey_bus(dev->subordinate); | |
473 | __pci_bus_size_bridges(dev->subordinate, &add_list); | |
c64b5eea | 474 | } |
42f49a6a | 475 | } |
1da177e4 | 476 | } |
d66ecb72 | 477 | __pci_bus_assign_resources(bus, &add_list, NULL); |
2dc41281 | 478 | |
8e5dce35 | 479 | acpiphp_sanitize_bus(bus); |
81ee5732 | 480 | pcie_bus_configure_settings(bus); |
d0607050 | 481 | acpiphp_set_acpi_region(slot); |
69643e48 IC |
482 | |
483 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
484 | /* Assume that newly added devices are powered on already. */ | |
485 | if (!dev->is_added) | |
486 | dev->current_state = PCI_D0; | |
487 | } | |
488 | ||
42f49a6a RS |
489 | pci_bus_add_devices(bus); |
490 | ||
f382a086 | 491 | slot->flags |= SLOT_ENABLED; |
58c08628 | 492 | list_for_each_entry(func, &slot->funcs, sibling) { |
9d911d79 AC |
493 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, |
494 | func->function)); | |
f382a086 AK |
495 | if (!dev) { |
496 | /* Do not set SLOT_ENABLED flag if some funcs | |
497 | are not added. */ | |
498 | slot->flags &= (~SLOT_ENABLED); | |
551bcb75 | 499 | continue; |
f382a086 | 500 | } |
1da177e4 | 501 | } |
1da177e4 LT |
502 | } |
503 | ||
1da177e4 | 504 | /** |
a1d0abce | 505 | * disable_slot - disable a slot |
26e6c66e | 506 | * @slot: ACPI PHP slot |
1da177e4 | 507 | */ |
a1d0abce | 508 | static void disable_slot(struct acpiphp_slot *slot) |
1da177e4 | 509 | { |
1c0c5443 RW |
510 | struct pci_bus *bus = slot->bus; |
511 | struct pci_dev *dev, *prev; | |
1da177e4 | 512 | struct acpiphp_func *func; |
551bcb75 | 513 | |
ce29ca3e | 514 | /* |
a1d0abce | 515 | * enable_slot() enumerates all functions in this device via |
ce29ca3e AK |
516 | * pci_scan_slot(), whether they have associated ACPI hotplug |
517 | * methods (_EJ0, etc.) or not. Therefore, we remove all functions | |
518 | * here. | |
519 | */ | |
1c0c5443 RW |
520 | list_for_each_entry_safe_reverse(dev, prev, &bus->devices, bus_list) |
521 | if (PCI_SLOT(dev->devfn) == slot->device) | |
522 | pci_stop_and_remove_bus_device(dev); | |
600812ec | 523 | |
5a3bc573 | 524 | list_for_each_entry(func, &slot->funcs, sibling) |
bbcbfc0e | 525 | acpi_bus_trim(func_to_acpi_device(func)); |
1da177e4 LT |
526 | |
527 | slot->flags &= (~SLOT_ENABLED); | |
1da177e4 LT |
528 | } |
529 | ||
f244d8b6 RW |
530 | static bool slot_no_hotplug(struct acpiphp_slot *slot) |
531 | { | |
b440bde7 BH |
532 | struct pci_bus *bus = slot->bus; |
533 | struct pci_dev *dev; | |
f244d8b6 | 534 | |
b440bde7 BH |
535 | list_for_each_entry(dev, &bus->devices, bus_list) { |
536 | if (PCI_SLOT(dev->devfn) == slot->device && dev->ignore_hotplug) | |
f244d8b6 | 537 | return true; |
b440bde7 | 538 | } |
f244d8b6 RW |
539 | return false; |
540 | } | |
1da177e4 LT |
541 | |
542 | /** | |
543 | * get_slot_status - get ACPI slot status | |
26e6c66e | 544 | * @slot: ACPI PHP slot |
1da177e4 | 545 | * |
26e6c66e RD |
546 | * If a slot has _STA for each function and if any one of them |
547 | * returned non-zero status, return it. | |
1da177e4 | 548 | * |
26e6c66e RD |
549 | * If a slot doesn't have _STA and if any one of its functions' |
550 | * configuration space is configured, return 0x0f as a _STA. | |
1da177e4 | 551 | * |
26e6c66e | 552 | * Otherwise return 0. |
1da177e4 LT |
553 | */ |
554 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
555 | { | |
27663c58 | 556 | unsigned long long sta = 0; |
1da177e4 LT |
557 | struct acpiphp_func *func; |
558 | ||
58c08628 | 559 | list_for_each_entry(func, &slot->funcs, sibling) { |
1da177e4 | 560 | if (func->flags & FUNC_HAS_STA) { |
5a3bc573 RW |
561 | acpi_status status; |
562 | ||
563 | status = acpi_evaluate_integer(func_to_handle(func), | |
564 | "_STA", NULL, &sta); | |
1da177e4 LT |
565 | if (ACPI_SUCCESS(status) && sta) |
566 | break; | |
567 | } else { | |
5a3bc573 RW |
568 | u32 dvid; |
569 | ||
bda46dbb | 570 | pci_bus_read_config_dword(slot->bus, |
1da177e4 LT |
571 | PCI_DEVFN(slot->device, |
572 | func->function), | |
573 | PCI_VENDOR_ID, &dvid); | |
574 | if (dvid != 0xffffffff) { | |
575 | sta = ACPI_STA_ALL; | |
576 | break; | |
577 | } | |
578 | } | |
579 | } | |
580 | ||
581 | return (unsigned int)sta; | |
582 | } | |
583 | ||
72820594 MW |
584 | static inline bool device_status_valid(unsigned int sta) |
585 | { | |
586 | /* | |
587 | * ACPI spec says that _STA may return bit 0 clear with bit 3 set | |
588 | * if the device is valid but does not require a device driver to be | |
589 | * loaded (Section 6.3.7 of ACPI 5.0A). | |
590 | */ | |
591 | unsigned int mask = ACPI_STA_DEVICE_ENABLED | ACPI_STA_DEVICE_FUNCTIONING; | |
592 | return (sta & mask) == mask; | |
593 | } | |
594 | ||
4ebe3450 RW |
595 | /** |
596 | * trim_stale_devices - remove PCI devices that are not responding. | |
597 | * @dev: PCI device to start walking the hierarchy from. | |
598 | */ | |
599 | static void trim_stale_devices(struct pci_dev *dev) | |
600 | { | |
4dc3082d | 601 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
4ebe3450 | 602 | struct pci_bus *bus = dev->subordinate; |
d41be346 | 603 | bool alive = dev->ignore_hotplug; |
4ebe3450 | 604 | |
4dc3082d | 605 | if (adev) { |
4ebe3450 RW |
606 | acpi_status status; |
607 | unsigned long long sta; | |
608 | ||
b2118d6a | 609 | status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta); |
d41be346 | 610 | alive = alive || (ACPI_SUCCESS(status) && device_status_valid(sta)); |
4ebe3450 | 611 | } |
b8a62d54 RW |
612 | if (!alive) |
613 | alive = pci_device_is_present(dev); | |
4ebe3450 | 614 | |
4ebe3450 RW |
615 | if (!alive) { |
616 | pci_stop_and_remove_bus_device(dev); | |
4dc3082d RW |
617 | if (adev) |
618 | acpi_bus_trim(adev); | |
4ebe3450 RW |
619 | } else if (bus) { |
620 | struct pci_dev *child, *tmp; | |
621 | ||
622 | /* The device is a bridge. so check the bus below it. */ | |
623 | pm_runtime_get_sync(&dev->dev); | |
2d7c1b77 | 624 | list_for_each_entry_safe_reverse(child, tmp, &bus->devices, bus_list) |
4ebe3450 RW |
625 | trim_stale_devices(child); |
626 | ||
627 | pm_runtime_put(&dev->dev); | |
628 | } | |
629 | } | |
630 | ||
1da177e4 LT |
631 | /** |
632 | * acpiphp_check_bridge - re-enumerate devices | |
26e6c66e | 633 | * @bridge: where to begin re-enumeration |
1da177e4 LT |
634 | * |
635 | * Iterate over all slots under this bridge and make sure that if a | |
636 | * card is present they are enabled, and if not they are disabled. | |
637 | */ | |
4ebe3450 | 638 | static void acpiphp_check_bridge(struct acpiphp_bridge *bridge) |
1da177e4 LT |
639 | { |
640 | struct acpiphp_slot *slot; | |
1da177e4 | 641 | |
9217a984 RW |
642 | /* Bail out if the bridge is going away. */ |
643 | if (bridge->is_going_away) | |
644 | return; | |
645 | ||
dd7fd3a8 RW |
646 | if (bridge->pci_dev) |
647 | pm_runtime_get_sync(&bridge->pci_dev->dev); | |
648 | ||
ad41dd9d | 649 | list_for_each_entry(slot, &bridge->slots, node) { |
4ebe3450 RW |
650 | struct pci_bus *bus = slot->bus; |
651 | struct pci_dev *dev, *tmp; | |
652 | ||
f244d8b6 RW |
653 | if (slot_no_hotplug(slot)) { |
654 | ; /* do nothing */ | |
72820594 | 655 | } else if (device_status_valid(get_slot_status(slot))) { |
4ebe3450 | 656 | /* remove stale devices if any */ |
2d7c1b77 RW |
657 | list_for_each_entry_safe_reverse(dev, tmp, |
658 | &bus->devices, bus_list) | |
4ebe3450 RW |
659 | if (PCI_SLOT(dev->devfn) == slot->device) |
660 | trim_stale_devices(dev); | |
661 | ||
662 | /* configure all functions */ | |
a1d0abce | 663 | enable_slot(slot); |
1da177e4 | 664 | } else { |
a1d0abce | 665 | disable_slot(slot); |
1da177e4 LT |
666 | } |
667 | } | |
dd7fd3a8 RW |
668 | |
669 | if (bridge->pci_dev) | |
670 | pm_runtime_put(&bridge->pci_dev->dev); | |
1da177e4 LT |
671 | } |
672 | ||
8e7561cf RS |
673 | /* |
674 | * Remove devices for which we could not assign resources, call | |
675 | * arch specific code to fix-up the bus | |
676 | */ | |
677 | static void acpiphp_sanitize_bus(struct pci_bus *bus) | |
678 | { | |
d65eba6a | 679 | struct pci_dev *dev, *tmp; |
8e7561cf RS |
680 | int i; |
681 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; | |
682 | ||
2d7c1b77 | 683 | list_for_each_entry_safe_reverse(dev, tmp, &bus->devices, bus_list) { |
ff3ce480 | 684 | for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) { |
8e7561cf RS |
685 | struct resource *res = &dev->resource[i]; |
686 | if ((res->flags & type_mask) && !res->start && | |
687 | res->end) { | |
688 | /* Could not assign a required resources | |
689 | * for this device, remove it */ | |
210647af | 690 | pci_stop_and_remove_bus_device(dev); |
8e7561cf RS |
691 | break; |
692 | } | |
693 | } | |
694 | } | |
695 | } | |
696 | ||
1da177e4 LT |
697 | /* |
698 | * ACPI event handlers | |
699 | */ | |
700 | ||
1f7c164b | 701 | void acpiphp_check_host_bridge(struct acpi_device *adev) |
3f327e39 | 702 | { |
86f5f3ca | 703 | struct acpiphp_bridge *bridge = NULL; |
3f327e39 | 704 | |
86f5f3ca RW |
705 | acpi_lock_hp_context(); |
706 | if (adev->hp) { | |
707 | bridge = to_acpiphp_root_context(adev->hp)->root_bridge; | |
708 | if (bridge) | |
709 | get_bridge(bridge); | |
710 | } | |
711 | acpi_unlock_hp_context(); | |
3f327e39 | 712 | if (bridge) { |
d42f5da2 RW |
713 | pci_lock_rescan_remove(); |
714 | ||
3f327e39 | 715 | acpiphp_check_bridge(bridge); |
d42f5da2 RW |
716 | |
717 | pci_unlock_rescan_remove(); | |
3f327e39 YL |
718 | put_bridge(bridge); |
719 | } | |
3f327e39 YL |
720 | } |
721 | ||
9217a984 RW |
722 | static int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot); |
723 | ||
d3a1ebb0 | 724 | static void hotplug_event(u32 type, struct acpiphp_context *context) |
1da177e4 | 725 | { |
3c2cc7ff | 726 | acpi_handle handle = context->hp.self->handle; |
bd4674df | 727 | struct acpiphp_func *func = &context->func; |
b75cece1 | 728 | struct acpiphp_slot *slot = func->slot; |
1da177e4 | 729 | struct acpiphp_bridge *bridge; |
6af8bef1 | 730 | |
e525506f | 731 | acpi_lock_hp_context(); |
c8ebcf1f | 732 | bridge = context->bridge; |
43e5c091 RW |
733 | if (bridge) |
734 | get_bridge(bridge); | |
1da177e4 | 735 | |
e525506f | 736 | acpi_unlock_hp_context(); |
3757b948 | 737 | |
f41b3261 | 738 | pci_lock_rescan_remove(); |
1da177e4 LT |
739 | |
740 | switch (type) { | |
741 | case ACPI_NOTIFY_BUS_CHECK: | |
742 | /* bus re-enumerate */ | |
1d4a5b61 | 743 | acpi_handle_debug(handle, "Bus check in %s()\n", __func__); |
b75cece1 | 744 | if (bridge) |
43e5c091 | 745 | acpiphp_check_bridge(bridge); |
b75cece1 | 746 | else if (!(slot->flags & SLOT_IS_GOING_AWAY)) |
a1d0abce | 747 | enable_slot(slot); |
4ebe3450 | 748 | |
1da177e4 LT |
749 | break; |
750 | ||
751 | case ACPI_NOTIFY_DEVICE_CHECK: | |
752 | /* device check */ | |
1d4a5b61 | 753 | acpi_handle_debug(handle, "Device check in %s()\n", __func__); |
a47d8c8e | 754 | if (bridge) { |
43e5c091 | 755 | acpiphp_check_bridge(bridge); |
b75cece1 | 756 | } else if (!(slot->flags & SLOT_IS_GOING_AWAY)) { |
a47d8c8e RW |
757 | /* |
758 | * Check if anything has changed in the slot and rescan | |
759 | * from the parent if that's the case. | |
760 | */ | |
661b4064 | 761 | if (acpiphp_rescan_slot(slot)) |
a47d8c8e RW |
762 | acpiphp_check_bridge(func->parent); |
763 | } | |
1da177e4 LT |
764 | break; |
765 | ||
1da177e4 LT |
766 | case ACPI_NOTIFY_EJECT_REQUEST: |
767 | /* request device eject */ | |
1d4a5b61 | 768 | acpi_handle_debug(handle, "Eject request in %s()\n", __func__); |
b75cece1 | 769 | acpiphp_disable_and_eject_slot(slot); |
1da177e4 | 770 | break; |
1da177e4 | 771 | } |
6af8bef1 | 772 | |
f41b3261 | 773 | pci_unlock_rescan_remove(); |
43e5c091 RW |
774 | if (bridge) |
775 | put_bridge(bridge); | |
21a31013 RW |
776 | } |
777 | ||
be27b3dc | 778 | static int acpiphp_hotplug_notify(struct acpi_device *adev, u32 type) |
6af8bef1 | 779 | { |
87831273 | 780 | struct acpiphp_context *context; |
87831273 | 781 | |
edf5bf34 RW |
782 | context = acpiphp_grab_context(adev); |
783 | if (!context) | |
3c2cc7ff | 784 | return -ENODATA; |
1b360f44 | 785 | |
3c2cc7ff | 786 | hotplug_event(type, context); |
edf5bf34 | 787 | acpiphp_let_context_go(context); |
3c2cc7ff | 788 | return 0; |
8e7561cf | 789 | } |
1da177e4 | 790 | |
454481ad RW |
791 | /** |
792 | * acpiphp_enumerate_slots - Enumerate PCI slots for a given bus. | |
793 | * @bus: PCI bus to enumerate the slots for. | |
794 | * | |
795 | * A "slot" is an object associated with a PCI device number. All functions | |
796 | * (PCI devices) with the same bus and device number belong to the same slot. | |
1da177e4 | 797 | */ |
be1c9de9 | 798 | void acpiphp_enumerate_slots(struct pci_bus *bus) |
1da177e4 | 799 | { |
3b63aaa7 | 800 | struct acpiphp_bridge *bridge; |
bbcbfc0e | 801 | struct acpi_device *adev; |
2552002a RW |
802 | acpi_handle handle; |
803 | acpi_status status; | |
1da177e4 | 804 | |
3b63aaa7 JL |
805 | if (acpiphp_disabled) |
806 | return; | |
1da177e4 | 807 | |
bbcbfc0e RW |
808 | adev = ACPI_COMPANION(bus->bridge); |
809 | if (!adev) | |
3b63aaa7 | 810 | return; |
1da177e4 | 811 | |
bbcbfc0e | 812 | handle = adev->handle; |
3b63aaa7 | 813 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
cb7b8ced RW |
814 | if (!bridge) { |
815 | acpi_handle_err(handle, "No memory for bridge object\n"); | |
3b63aaa7 JL |
816 | return; |
817 | } | |
818 | ||
ad41dd9d | 819 | INIT_LIST_HEAD(&bridge->slots); |
3d54a316 | 820 | kref_init(&bridge->ref); |
3b63aaa7 JL |
821 | bridge->pci_dev = pci_dev_get(bus->self); |
822 | bridge->pci_bus = bus; | |
823 | ||
824 | /* | |
825 | * Grab a ref to the subordinate PCI bus in case the bus is | |
826 | * removed via PCI core logical hotplug. The ref pins the bus | |
827 | * (which we access during module unload). | |
828 | */ | |
829 | get_device(&bus->dev); | |
830 | ||
882d18a7 RW |
831 | acpi_lock_hp_context(); |
832 | if (pci_is_root_bus(bridge->pci_bus)) { | |
833 | struct acpiphp_root_context *root_context; | |
834 | ||
835 | root_context = kzalloc(sizeof(*root_context), GFP_KERNEL); | |
836 | if (!root_context) | |
837 | goto err; | |
838 | ||
839 | root_context->root_bridge = bridge; | |
ba574dc8 | 840 | acpi_set_hp_context(adev, &root_context->hp); |
882d18a7 | 841 | } else { |
bbd34fcd RW |
842 | struct acpiphp_context *context; |
843 | ||
844 | /* | |
845 | * This bridge should have been registered as a hotplug function | |
fd3cfebe RW |
846 | * under its parent, so the context should be there, unless the |
847 | * parent is going to be handled by pciehp, in which case this | |
848 | * bridge is not interesting to us either. | |
bbd34fcd | 849 | */ |
3c2cc7ff | 850 | context = acpiphp_get_context(adev); |
882d18a7 RW |
851 | if (!context) |
852 | goto err; | |
853 | ||
bbd34fcd RW |
854 | bridge->context = context; |
855 | context->bridge = bridge; | |
856 | /* Get a reference to the parent bridge. */ | |
bda46dbb | 857 | get_bridge(context->func.parent); |
bbd34fcd | 858 | } |
882d18a7 | 859 | acpi_unlock_hp_context(); |
bbd34fcd | 860 | |
3799c5a0 | 861 | /* Must be added to the list prior to calling acpiphp_add_context(). */ |
2552002a RW |
862 | mutex_lock(&bridge_mutex); |
863 | list_add(&bridge->list, &bridge_list); | |
864 | mutex_unlock(&bridge_mutex); | |
865 | ||
866 | /* register all slot objects under this bridge */ | |
89373a55 | 867 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1, |
3799c5a0 | 868 | acpiphp_add_context, NULL, bridge, NULL); |
2552002a | 869 | if (ACPI_FAILURE(status)) { |
89373a55 | 870 | acpi_handle_err(handle, "failed to register slots\n"); |
bbd34fcd RW |
871 | cleanup_bridge(bridge); |
872 | put_bridge(bridge); | |
2552002a | 873 | } |
882d18a7 RW |
874 | return; |
875 | ||
876 | err: | |
877 | acpi_unlock_hp_context(); | |
878 | put_device(&bus->dev); | |
879 | pci_dev_put(bridge->pci_dev); | |
880 | kfree(bridge); | |
881 | } | |
882 | ||
902ee490 | 883 | static void acpiphp_drop_bridge(struct acpiphp_bridge *bridge) |
882d18a7 RW |
884 | { |
885 | if (pci_is_root_bus(bridge->pci_bus)) { | |
886 | struct acpiphp_root_context *root_context; | |
887 | struct acpi_device *adev; | |
888 | ||
889 | acpi_lock_hp_context(); | |
890 | adev = ACPI_COMPANION(bridge->pci_bus->bridge); | |
891 | root_context = to_acpiphp_root_context(adev->hp); | |
892 | adev->hp = NULL; | |
893 | acpi_unlock_hp_context(); | |
894 | kfree(root_context); | |
895 | } | |
896 | cleanup_bridge(bridge); | |
897 | put_bridge(bridge); | |
3b63aaa7 JL |
898 | } |
899 | ||
454481ad RW |
900 | /** |
901 | * acpiphp_remove_slots - Remove slot objects associated with a given bus. | |
902 | * @bus: PCI bus to remove the slot objects for. | |
903 | */ | |
3b63aaa7 | 904 | void acpiphp_remove_slots(struct pci_bus *bus) |
1da177e4 | 905 | { |
ff181e5a | 906 | struct acpiphp_bridge *bridge; |
3b63aaa7 JL |
907 | |
908 | if (acpiphp_disabled) | |
909 | return; | |
910 | ||
ff181e5a RW |
911 | mutex_lock(&bridge_mutex); |
912 | list_for_each_entry(bridge, &bridge_list, list) | |
3b63aaa7 | 913 | if (bridge->pci_bus == bus) { |
ff181e5a | 914 | mutex_unlock(&bridge_mutex); |
882d18a7 | 915 | acpiphp_drop_bridge(bridge); |
ff181e5a | 916 | return; |
3b63aaa7 | 917 | } |
ff181e5a RW |
918 | |
919 | mutex_unlock(&bridge_mutex); | |
1da177e4 LT |
920 | } |
921 | ||
1da177e4 LT |
922 | /** |
923 | * acpiphp_enable_slot - power on slot | |
26e6c66e | 924 | * @slot: ACPI PHP slot |
1da177e4 LT |
925 | */ |
926 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
927 | { | |
9217a984 RW |
928 | pci_lock_rescan_remove(); |
929 | ||
2c3033a0 IY |
930 | if (slot->flags & SLOT_IS_GOING_AWAY) { |
931 | pci_unlock_rescan_remove(); | |
9217a984 | 932 | return -ENODEV; |
2c3033a0 | 933 | } |
9217a984 | 934 | |
bc805a55 | 935 | /* configure all functions */ |
55502ddb | 936 | if (!(slot->flags & SLOT_ENABLED)) |
a1d0abce | 937 | enable_slot(slot); |
55502ddb | 938 | |
9217a984 | 939 | pci_unlock_rescan_remove(); |
a1d0abce | 940 | return 0; |
1da177e4 LT |
941 | } |
942 | ||
1da177e4 | 943 | /** |
ad21d2d0 | 944 | * acpiphp_disable_and_eject_slot - power off and eject slot |
26e6c66e | 945 | * @slot: ACPI PHP slot |
1da177e4 | 946 | */ |
9217a984 | 947 | static int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot) |
1da177e4 | 948 | { |
ad21d2d0 | 949 | struct acpiphp_func *func; |
9217a984 RW |
950 | |
951 | if (slot->flags & SLOT_IS_GOING_AWAY) | |
952 | return -ENODEV; | |
1da177e4 | 953 | |
1da177e4 | 954 | /* unconfigure all functions */ |
a1d0abce | 955 | disable_slot(slot); |
1da177e4 | 956 | |
ad21d2d0 MW |
957 | list_for_each_entry(func, &slot->funcs, sibling) |
958 | if (func->flags & FUNC_HAS_EJ0) { | |
959 | acpi_handle handle = func_to_handle(func); | |
960 | ||
961 | if (ACPI_FAILURE(acpi_evaluate_ej0(handle))) | |
962 | acpi_handle_err(handle, "_EJ0 failed\n"); | |
963 | ||
964 | break; | |
965 | } | |
966 | ||
9217a984 | 967 | return 0; |
1da177e4 LT |
968 | } |
969 | ||
9217a984 RW |
970 | int acpiphp_disable_slot(struct acpiphp_slot *slot) |
971 | { | |
972 | int ret; | |
973 | ||
21369c77 RW |
974 | /* |
975 | * Acquire acpi_scan_lock to ensure that the execution of _EJ0 in | |
976 | * acpiphp_disable_and_eject_slot() will be synchronized properly. | |
977 | */ | |
978 | acpi_scan_lock_acquire(); | |
9217a984 RW |
979 | pci_lock_rescan_remove(); |
980 | ret = acpiphp_disable_and_eject_slot(slot); | |
981 | pci_unlock_rescan_remove(); | |
21369c77 | 982 | acpi_scan_lock_release(); |
9217a984 RW |
983 | return ret; |
984 | } | |
1da177e4 LT |
985 | |
986 | /* | |
987 | * slot enabled: 1 | |
988 | * slot disabled: 0 | |
989 | */ | |
990 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
991 | { | |
bc805a55 | 992 | return (slot->flags & SLOT_ENABLED); |
1da177e4 LT |
993 | } |
994 | ||
1da177e4 | 995 | /* |
35ae61a0 MT |
996 | * latch open: 1 |
997 | * latch closed: 0 | |
1da177e4 LT |
998 | */ |
999 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1000 | { | |
1ad3790a | 1001 | return !(get_slot_status(slot) & ACPI_STA_DEVICE_UI); |
1da177e4 LT |
1002 | } |
1003 | ||
1da177e4 LT |
1004 | /* |
1005 | * adapter presence : 1 | |
1006 | * absence : 0 | |
1007 | */ | |
1008 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1009 | { | |
1ad3790a | 1010 | return !!get_slot_status(slot); |
1da177e4 | 1011 | } |