Commit | Line | Data |
---|---|---|
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 | ||
1da177e4 LT |
42 | #include <linux/init.h> |
43 | #include <linux/module.h> | |
44 | ||
45 | #include <linux/kernel.h> | |
46 | #include <linux/pci.h> | |
7a54f25c | 47 | #include <linux/pci_hotplug.h> |
e8c331e9 | 48 | #include <linux/pci-acpi.h> |
6aa4cdd0 | 49 | #include <linux/mutex.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
6af8bef1 | 51 | #include <linux/acpi.h> |
1da177e4 LT |
52 | |
53 | #include "../pci.h" | |
1da177e4 LT |
54 | #include "acpiphp.h" |
55 | ||
56 | static LIST_HEAD(bridge_list); | |
57 | ||
58 | #define MY_NAME "acpiphp_glue" | |
59 | ||
60 | static void handle_hotplug_event_bridge (acpi_handle, u32, void *); | |
8e5dce35 | 61 | static void acpiphp_sanitize_bus(struct pci_bus *bus); |
fca6825a | 62 | static void acpiphp_set_hpp_values(struct pci_bus *bus); |
2b85e130 | 63 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context); |
8e5dce35 | 64 | |
5a340ed8 | 65 | /* callback routine to check for the existence of a pci dock device */ |
4e8662bb KA |
66 | static acpi_status |
67 | is_pci_dock_device(acpi_handle handle, u32 lvl, void *context, void **rv) | |
68 | { | |
69 | int *count = (int *)context; | |
70 | ||
71 | if (is_dock_device(handle)) { | |
72 | (*count)++; | |
73 | return AE_CTRL_TERMINATE; | |
74 | } else { | |
75 | return AE_OK; | |
76 | } | |
77 | } | |
78 | ||
4e8662bb KA |
79 | /* |
80 | * the _DCK method can do funny things... and sometimes not | |
81 | * hah-hah funny. | |
82 | * | |
83 | * TBD - figure out a way to only call fixups for | |
84 | * systems that require them. | |
85 | */ | |
86 | static int post_dock_fixups(struct notifier_block *nb, unsigned long val, | |
87 | void *v) | |
88 | { | |
89 | struct acpiphp_func *func = container_of(nb, struct acpiphp_func, nb); | |
90 | struct pci_bus *bus = func->slot->bridge->pci_bus; | |
91 | u32 buses; | |
92 | ||
93 | if (!bus->self) | |
94 | return NOTIFY_OK; | |
95 | ||
96 | /* fixup bad _DCK function that rewrites | |
97 | * secondary bridge on slot | |
98 | */ | |
99 | pci_read_config_dword(bus->self, | |
100 | PCI_PRIMARY_BUS, | |
101 | &buses); | |
102 | ||
b918c62e | 103 | if (((buses >> 8) & 0xff) != bus->busn_res.start) { |
4e8662bb | 104 | buses = (buses & 0xff000000) |
2a9d3521 | 105 | | ((unsigned int)(bus->primary) << 0) |
b918c62e YL |
106 | | ((unsigned int)(bus->busn_res.start) << 8) |
107 | | ((unsigned int)(bus->busn_res.end) << 16); | |
4e8662bb KA |
108 | pci_write_config_dword(bus->self, PCI_PRIMARY_BUS, buses); |
109 | } | |
110 | return NOTIFY_OK; | |
111 | } | |
112 | ||
113 | ||
9c8b04be | 114 | static const struct acpi_dock_ops acpiphp_dock_ops = { |
1253f7aa SL |
115 | .handler = handle_hotplug_event_func, |
116 | }; | |
1da177e4 LT |
117 | |
118 | /* callback routine to register each ACPI PCI slot object */ | |
119 | static acpi_status | |
120 | register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) | |
121 | { | |
122 | struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context; | |
123 | struct acpiphp_slot *slot; | |
124 | struct acpiphp_func *newfunc; | |
125 | acpi_handle tmp; | |
126 | acpi_status status = AE_OK; | |
27663c58 | 127 | unsigned long long adr, sun; |
e27da381 | 128 | int device, function, retval; |
e8c331e9 | 129 | struct pci_bus *pbus = bridge->pci_bus; |
9d911d79 | 130 | struct pci_dev *pdev; |
1da177e4 | 131 | |
e8c331e9 | 132 | if (!acpi_pci_check_ejectable(pbus, handle) && !is_dock_device(handle)) |
1da177e4 LT |
133 | return AE_OK; |
134 | ||
dfb117b3 BH |
135 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr); |
136 | if (ACPI_FAILURE(status)) { | |
137 | warn("can't evaluate _ADR (%#x)\n", status); | |
138 | return AE_OK; | |
139 | } | |
140 | ||
141 | device = (adr >> 16) & 0xffff; | |
142 | function = adr & 0xffff; | |
143 | ||
619a5182 RW |
144 | pdev = pbus->self; |
145 | if (pdev && pci_is_pcie(pdev)) { | |
146 | tmp = acpi_find_root_bridge_handle(pdev); | |
147 | if (tmp) { | |
148 | struct acpi_pci_root *root = acpi_pci_find_root(tmp); | |
149 | ||
150 | if (root && (root->osc_control_set & | |
151 | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL)) | |
152 | return AE_OK; | |
153 | } | |
154 | } | |
155 | ||
f5afe806 | 156 | newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL); |
1da177e4 LT |
157 | if (!newfunc) |
158 | return AE_NO_MEMORY; | |
1da177e4 LT |
159 | |
160 | INIT_LIST_HEAD(&newfunc->sibling); | |
161 | newfunc->handle = handle; | |
162 | newfunc->function = function; | |
56ee325e MG |
163 | |
164 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp))) | |
20416ea5 | 165 | newfunc->flags = FUNC_HAS_EJ0; |
1da177e4 LT |
166 | |
167 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp))) | |
168 | newfunc->flags |= FUNC_HAS_STA; | |
169 | ||
170 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp))) | |
171 | newfunc->flags |= FUNC_HAS_PS0; | |
172 | ||
173 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) | |
174 | newfunc->flags |= FUNC_HAS_PS3; | |
175 | ||
4e8662bb | 176 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp))) |
20416ea5 | 177 | newfunc->flags |= FUNC_HAS_DCK; |
20416ea5 | 178 | |
1da177e4 | 179 | status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); |
95b38b3f KA |
180 | if (ACPI_FAILURE(status)) { |
181 | /* | |
182 | * use the count of the number of slots we've found | |
183 | * for the number of the slot | |
184 | */ | |
185 | sun = bridge->nr_slots+1; | |
186 | } | |
1da177e4 LT |
187 | |
188 | /* search for objects that share the same slot */ | |
189 | for (slot = bridge->slots; slot; slot = slot->next) | |
190 | if (slot->device == device) { | |
191 | if (slot->sun != sun) | |
192 | warn("sibling found, but _SUN doesn't match!\n"); | |
193 | break; | |
194 | } | |
195 | ||
196 | if (!slot) { | |
f5afe806 | 197 | slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); |
1da177e4 LT |
198 | if (!slot) { |
199 | kfree(newfunc); | |
200 | return AE_NO_MEMORY; | |
201 | } | |
202 | ||
1da177e4 | 203 | slot->bridge = bridge; |
1da177e4 LT |
204 | slot->device = device; |
205 | slot->sun = sun; | |
206 | INIT_LIST_HEAD(&slot->funcs); | |
6aa4cdd0 | 207 | mutex_init(&slot->crit_sect); |
1da177e4 LT |
208 | |
209 | slot->next = bridge->slots; | |
210 | bridge->slots = slot; | |
211 | ||
212 | bridge->nr_slots++; | |
213 | ||
b6adc195 | 214 | dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n", |
e8c331e9 | 215 | slot->sun, pci_domain_nr(pbus), pbus->number, device); |
e27da381 MT |
216 | retval = acpiphp_register_hotplug_slot(slot); |
217 | if (retval) { | |
f46753c5 | 218 | if (retval == -EBUSY) |
b6adc195 | 219 | warn("Slot %llu already registered by another " |
f46753c5 AC |
220 | "hotplug driver\n", slot->sun); |
221 | else | |
222 | warn("acpiphp_register_hotplug_slot failed " | |
223 | "(err code = 0x%x)\n", retval); | |
e27da381 MT |
224 | goto err_exit; |
225 | } | |
1da177e4 LT |
226 | } |
227 | ||
228 | newfunc->slot = slot; | |
229 | list_add_tail(&newfunc->sibling, &slot->funcs); | |
230 | ||
9d911d79 AC |
231 | pdev = pci_get_slot(pbus, PCI_DEVFN(device, function)); |
232 | if (pdev) { | |
1da177e4 | 233 | slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); |
9d911d79 | 234 | pci_dev_put(pdev); |
1da177e4 LT |
235 | } |
236 | ||
4e8662bb KA |
237 | if (is_dock_device(handle)) { |
238 | /* we don't want to call this device's _EJ0 | |
239 | * because we want the dock notify handler | |
240 | * to call it after it calls _DCK | |
20416ea5 KA |
241 | */ |
242 | newfunc->flags &= ~FUNC_HAS_EJ0; | |
4e8662bb | 243 | if (register_hotplug_dock_device(handle, |
1253f7aa | 244 | &acpiphp_dock_ops, newfunc)) |
4e8662bb KA |
245 | dbg("failed to register dock device\n"); |
246 | ||
247 | /* we need to be notified when dock events happen | |
248 | * outside of the hotplug operation, since we may | |
249 | * need to do fixups before we can hotplug. | |
250 | */ | |
251 | newfunc->nb.notifier_call = post_dock_fixups; | |
252 | if (register_dock_notifier(&newfunc->nb)) | |
253 | dbg("failed to register a dock notifier"); | |
20416ea5 KA |
254 | } |
255 | ||
1da177e4 | 256 | /* install notify handler */ |
20416ea5 KA |
257 | if (!(newfunc->flags & FUNC_HAS_DCK)) { |
258 | status = acpi_install_notify_handler(handle, | |
1da177e4 LT |
259 | ACPI_SYSTEM_NOTIFY, |
260 | handle_hotplug_event_func, | |
261 | newfunc); | |
262 | ||
20416ea5 KA |
263 | if (ACPI_FAILURE(status)) |
264 | err("failed to register interrupt notify handler\n"); | |
265 | } else | |
266 | status = AE_OK; | |
1da177e4 | 267 | |
20416ea5 | 268 | return status; |
e27da381 MT |
269 | |
270 | err_exit: | |
271 | bridge->nr_slots--; | |
272 | bridge->slots = slot->next; | |
273 | kfree(slot); | |
274 | kfree(newfunc); | |
275 | ||
276 | return AE_OK; | |
1da177e4 LT |
277 | } |
278 | ||
279 | ||
280 | /* see if it's worth looking at this bridge */ | |
6edd7679 | 281 | static int detect_ejectable_slots(acpi_handle handle) |
1da177e4 | 282 | { |
7f538669 | 283 | int found = acpi_pci_detect_ejectable(handle); |
e8c331e9 | 284 | if (!found) { |
6edd7679 | 285 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, |
2263576c | 286 | is_pci_dock_device, NULL, (void *)&found, NULL); |
e8c331e9 KK |
287 | } |
288 | return found; | |
1da177e4 LT |
289 | } |
290 | ||
1da177e4 LT |
291 | /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */ |
292 | static void init_bridge_misc(struct acpiphp_bridge *bridge) | |
293 | { | |
294 | acpi_status status; | |
295 | ||
e27da381 MT |
296 | /* must be added to the list prior to calling register_slot */ |
297 | list_add(&bridge->list, &bridge_list); | |
298 | ||
1da177e4 LT |
299 | /* register all slot objects under this bridge */ |
300 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1, | |
2263576c | 301 | register_slot, NULL, bridge, NULL); |
e27da381 MT |
302 | if (ACPI_FAILURE(status)) { |
303 | list_del(&bridge->list); | |
304 | return; | |
305 | } | |
1da177e4 LT |
306 | |
307 | /* install notify handler */ | |
8e7561cf | 308 | if (bridge->type != BRIDGE_TYPE_HOST) { |
551bcb75 MT |
309 | if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) { |
310 | status = acpi_remove_notify_handler(bridge->func->handle, | |
311 | ACPI_SYSTEM_NOTIFY, | |
312 | handle_hotplug_event_func); | |
313 | if (ACPI_FAILURE(status)) | |
314 | err("failed to remove notify handler\n"); | |
315 | } | |
8e7561cf | 316 | status = acpi_install_notify_handler(bridge->handle, |
1da177e4 LT |
317 | ACPI_SYSTEM_NOTIFY, |
318 | handle_hotplug_event_bridge, | |
319 | bridge); | |
320 | ||
8e7561cf RS |
321 | if (ACPI_FAILURE(status)) { |
322 | err("failed to register interrupt notify handler\n"); | |
323 | } | |
1da177e4 | 324 | } |
1da177e4 LT |
325 | } |
326 | ||
327 | ||
551bcb75 MT |
328 | /* find acpiphp_func from acpiphp_bridge */ |
329 | static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle) | |
330 | { | |
551bcb75 MT |
331 | struct acpiphp_bridge *bridge; |
332 | struct acpiphp_slot *slot; | |
333 | struct acpiphp_func *func; | |
334 | ||
58c08628 | 335 | list_for_each_entry(bridge, &bridge_list, list) { |
551bcb75 | 336 | for (slot = bridge->slots; slot; slot = slot->next) { |
58c08628 | 337 | list_for_each_entry(func, &slot->funcs, sibling) { |
551bcb75 MT |
338 | if (func->handle == handle) |
339 | return func; | |
340 | } | |
341 | } | |
342 | } | |
343 | ||
344 | return NULL; | |
345 | } | |
346 | ||
347 | ||
348 | static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge) | |
349 | { | |
350 | acpi_handle dummy_handle; | |
351 | ||
352 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
353 | "_STA", &dummy_handle))) | |
354 | bridge->flags |= BRIDGE_HAS_STA; | |
355 | ||
356 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
357 | "_EJ0", &dummy_handle))) | |
358 | bridge->flags |= BRIDGE_HAS_EJ0; | |
359 | ||
360 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
361 | "_PS0", &dummy_handle))) | |
362 | bridge->flags |= BRIDGE_HAS_PS0; | |
363 | ||
364 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
365 | "_PS3", &dummy_handle))) | |
366 | bridge->flags |= BRIDGE_HAS_PS3; | |
367 | ||
368 | /* is this ejectable p2p bridge? */ | |
369 | if (bridge->flags & BRIDGE_HAS_EJ0) { | |
370 | struct acpiphp_func *func; | |
371 | ||
372 | dbg("found ejectable p2p bridge\n"); | |
373 | ||
374 | /* make link between PCI bridge and PCI function */ | |
375 | func = acpiphp_bridge_handle_to_function(bridge->handle); | |
376 | if (!func) | |
377 | return; | |
378 | bridge->func = func; | |
379 | func->bridge = bridge; | |
380 | } | |
381 | } | |
382 | ||
383 | ||
1da177e4 | 384 | /* allocate and initialize host bridge data structure */ |
55bfe3c0 | 385 | static void add_host_bridge(struct acpi_pci_root *root) |
1da177e4 | 386 | { |
1da177e4 | 387 | struct acpiphp_bridge *bridge; |
55bfe3c0 | 388 | acpi_handle handle = root->device->handle; |
1da177e4 | 389 | |
f5afe806 | 390 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
391 | if (bridge == NULL) |
392 | return; | |
393 | ||
1da177e4 LT |
394 | bridge->type = BRIDGE_TYPE_HOST; |
395 | bridge->handle = handle; | |
1da177e4 | 396 | |
6edd7679 | 397 | bridge->pci_bus = root->bus; |
1da177e4 | 398 | |
1da177e4 LT |
399 | init_bridge_misc(bridge); |
400 | } | |
401 | ||
402 | ||
403 | /* allocate and initialize PCI-to-PCI bridge data structure */ | |
6edd7679 | 404 | static void add_p2p_bridge(acpi_handle *handle) |
1da177e4 LT |
405 | { |
406 | struct acpiphp_bridge *bridge; | |
1da177e4 | 407 | |
f5afe806 | 408 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
409 | if (bridge == NULL) { |
410 | err("out of memory\n"); | |
411 | return; | |
412 | } | |
413 | ||
1da177e4 LT |
414 | bridge->type = BRIDGE_TYPE_P2P; |
415 | bridge->handle = handle; | |
551bcb75 | 416 | config_p2p_bridge_flags(bridge); |
1da177e4 | 417 | |
6edd7679 AC |
418 | bridge->pci_dev = acpi_get_pci_dev(handle); |
419 | bridge->pci_bus = bridge->pci_dev->subordinate; | |
1da177e4 LT |
420 | if (!bridge->pci_bus) { |
421 | err("This is not a PCI-to-PCI bridge!\n"); | |
42f49a6a | 422 | goto err; |
1da177e4 LT |
423 | } |
424 | ||
5d4a4b25 AC |
425 | /* |
426 | * Grab a ref to the subordinate PCI bus in case the bus is | |
427 | * removed via PCI core logical hotplug. The ref pins the bus | |
428 | * (which we access during module unload). | |
429 | */ | |
430 | get_device(&bridge->pci_bus->dev); | |
1da177e4 | 431 | |
1da177e4 | 432 | init_bridge_misc(bridge); |
42f49a6a RS |
433 | return; |
434 | err: | |
6edd7679 | 435 | pci_dev_put(bridge->pci_dev); |
42f49a6a RS |
436 | kfree(bridge); |
437 | return; | |
1da177e4 LT |
438 | } |
439 | ||
440 | ||
441 | /* callback routine to find P2P bridges */ | |
442 | static acpi_status | |
443 | find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
444 | { | |
445 | acpi_status status; | |
1da177e4 | 446 | struct pci_dev *dev; |
1da177e4 | 447 | |
6edd7679 | 448 | dev = acpi_get_pci_dev(handle); |
42f49a6a RS |
449 | if (!dev || !dev->subordinate) |
450 | goto out; | |
1da177e4 LT |
451 | |
452 | /* check if this bridge has ejectable slots */ | |
6edd7679 | 453 | if ((detect_ejectable_slots(handle) > 0)) { |
1da177e4 | 454 | dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); |
6edd7679 | 455 | add_p2p_bridge(handle); |
1da177e4 LT |
456 | } |
457 | ||
7c8f25da KK |
458 | /* search P2P bridges under this p2p bridge */ |
459 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
2263576c | 460 | find_p2p_bridge, NULL, NULL, NULL); |
7c8f25da | 461 | if (ACPI_FAILURE(status)) |
551bcb75 | 462 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
7c8f25da | 463 | |
42f49a6a RS |
464 | out: |
465 | pci_dev_put(dev); | |
1da177e4 LT |
466 | return AE_OK; |
467 | } | |
468 | ||
469 | ||
470 | /* find hot-pluggable slots, and then find P2P bridge */ | |
55bfe3c0 | 471 | static int add_bridge(struct acpi_pci_root *root) |
1da177e4 LT |
472 | { |
473 | acpi_status status; | |
27663c58 | 474 | unsigned long long tmp; |
1da177e4 | 475 | acpi_handle dummy_handle; |
55bfe3c0 | 476 | acpi_handle handle = root->device->handle; |
1da177e4 LT |
477 | |
478 | /* if the bridge doesn't have _STA, we assume it is always there */ | |
479 | status = acpi_get_handle(handle, "_STA", &dummy_handle); | |
480 | if (ACPI_SUCCESS(status)) { | |
481 | status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp); | |
482 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 483 | dbg("%s: _STA evaluation failure\n", __func__); |
1da177e4 LT |
484 | return 0; |
485 | } | |
486 | if ((tmp & ACPI_STA_FUNCTIONING) == 0) | |
487 | /* don't register this object */ | |
488 | return 0; | |
489 | } | |
490 | ||
1da177e4 | 491 | /* check if this bridge has ejectable slots */ |
6edd7679 | 492 | if (detect_ejectable_slots(handle) > 0) { |
1da177e4 | 493 | dbg("found PCI host-bus bridge with hot-pluggable slots\n"); |
55bfe3c0 | 494 | add_host_bridge(root); |
1da177e4 LT |
495 | } |
496 | ||
1da177e4 LT |
497 | /* search P2P bridges under this host bridge */ |
498 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
2263576c | 499 | find_p2p_bridge, NULL, NULL, NULL); |
1da177e4 LT |
500 | |
501 | if (ACPI_FAILURE(status)) | |
551bcb75 | 502 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
1da177e4 LT |
503 | |
504 | return 0; | |
505 | } | |
506 | ||
42f49a6a RS |
507 | static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle) |
508 | { | |
58c08628 AC |
509 | struct acpiphp_bridge *bridge; |
510 | ||
511 | list_for_each_entry(bridge, &bridge_list, list) | |
42f49a6a RS |
512 | if (bridge->handle == handle) |
513 | return bridge; | |
42f49a6a RS |
514 | |
515 | return NULL; | |
516 | } | |
1da177e4 | 517 | |
364d5094 | 518 | static void cleanup_bridge(struct acpiphp_bridge *bridge) |
1da177e4 | 519 | { |
58c08628 AC |
520 | struct acpiphp_slot *slot, *next; |
521 | struct acpiphp_func *func, *tmp; | |
42f49a6a | 522 | acpi_status status; |
364d5094 | 523 | acpi_handle handle = bridge->handle; |
42f49a6a RS |
524 | |
525 | status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
526 | handle_hotplug_event_bridge); | |
527 | if (ACPI_FAILURE(status)) | |
528 | err("failed to remove notify handler\n"); | |
529 | ||
551bcb75 MT |
530 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
531 | ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) { | |
532 | status = acpi_install_notify_handler(bridge->func->handle, | |
533 | ACPI_SYSTEM_NOTIFY, | |
534 | handle_hotplug_event_func, | |
535 | bridge->func); | |
536 | if (ACPI_FAILURE(status)) | |
537 | err("failed to install interrupt notify handler\n"); | |
538 | } | |
539 | ||
42f49a6a RS |
540 | slot = bridge->slots; |
541 | while (slot) { | |
58c08628 AC |
542 | next = slot->next; |
543 | list_for_each_entry_safe(func, tmp, &slot->funcs, sibling) { | |
4e8662bb KA |
544 | if (is_dock_device(func->handle)) { |
545 | unregister_hotplug_dock_device(func->handle); | |
546 | unregister_dock_notifier(&func->nb); | |
547 | } | |
20416ea5 KA |
548 | if (!(func->flags & FUNC_HAS_DCK)) { |
549 | status = acpi_remove_notify_handler(func->handle, | |
42f49a6a RS |
550 | ACPI_SYSTEM_NOTIFY, |
551 | handle_hotplug_event_func); | |
20416ea5 KA |
552 | if (ACPI_FAILURE(status)) |
553 | err("failed to remove notify handler\n"); | |
554 | } | |
58c08628 | 555 | list_del(&func->sibling); |
42f49a6a RS |
556 | kfree(func); |
557 | } | |
e27da381 MT |
558 | acpiphp_unregister_hotplug_slot(slot); |
559 | list_del(&slot->funcs); | |
42f49a6a RS |
560 | kfree(slot); |
561 | slot = next; | |
562 | } | |
563 | ||
5d4a4b25 AC |
564 | /* |
565 | * Only P2P bridges have a pci_dev | |
566 | */ | |
567 | if (bridge->pci_dev) | |
568 | put_device(&bridge->pci_bus->dev); | |
569 | ||
42f49a6a RS |
570 | pci_dev_put(bridge->pci_dev); |
571 | list_del(&bridge->list); | |
572 | kfree(bridge); | |
1da177e4 LT |
573 | } |
574 | ||
364d5094 RS |
575 | static acpi_status |
576 | cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
577 | { | |
578 | struct acpiphp_bridge *bridge; | |
579 | ||
551bcb75 MT |
580 | /* cleanup p2p bridges under this P2P bridge |
581 | in a depth-first manner */ | |
582 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
2263576c | 583 | cleanup_p2p_bridge, NULL, NULL, NULL); |
551bcb75 | 584 | |
a13307ce AC |
585 | bridge = acpiphp_handle_to_bridge(handle); |
586 | if (bridge) | |
587 | cleanup_bridge(bridge); | |
588 | ||
364d5094 RS |
589 | return AE_OK; |
590 | } | |
591 | ||
55bfe3c0 | 592 | static void remove_bridge(struct acpi_pci_root *root) |
364d5094 RS |
593 | { |
594 | struct acpiphp_bridge *bridge; | |
55bfe3c0 | 595 | acpi_handle handle = root->device->handle; |
364d5094 | 596 | |
551bcb75 MT |
597 | /* cleanup p2p bridges under this host bridge |
598 | in a depth-first manner */ | |
599 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
2263576c | 600 | (u32)1, cleanup_p2p_bridge, NULL, NULL, NULL); |
551bcb75 | 601 | |
a13307ce AC |
602 | /* |
603 | * On root bridges with hotplug slots directly underneath (ie, | |
25985edc | 604 | * no p2p bridge between), we call cleanup_bridge(). |
a13307ce AC |
605 | * |
606 | * The else clause cleans up root bridges that either had no | |
607 | * hotplug slots at all, or had a p2p bridge underneath. | |
608 | */ | |
364d5094 | 609 | bridge = acpiphp_handle_to_bridge(handle); |
551bcb75 | 610 | if (bridge) |
364d5094 | 611 | cleanup_bridge(bridge); |
a13307ce AC |
612 | else |
613 | acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
614 | handle_hotplug_event_bridge); | |
364d5094 | 615 | } |
1da177e4 LT |
616 | |
617 | static int power_on_slot(struct acpiphp_slot *slot) | |
618 | { | |
619 | acpi_status status; | |
620 | struct acpiphp_func *func; | |
1da177e4 LT |
621 | int retval = 0; |
622 | ||
623 | /* if already enabled, just skip */ | |
624 | if (slot->flags & SLOT_POWEREDON) | |
625 | goto err_exit; | |
626 | ||
58c08628 | 627 | list_for_each_entry(func, &slot->funcs, sibling) { |
1da177e4 | 628 | if (func->flags & FUNC_HAS_PS0) { |
66bef8c0 | 629 | dbg("%s: executing _PS0\n", __func__); |
1da177e4 LT |
630 | status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); |
631 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 632 | warn("%s: _PS0 failed\n", __func__); |
1da177e4 LT |
633 | retval = -1; |
634 | goto err_exit; | |
635 | } else | |
636 | break; | |
637 | } | |
638 | } | |
639 | ||
640 | /* TBD: evaluate _STA to check if the slot is enabled */ | |
641 | ||
642 | slot->flags |= SLOT_POWEREDON; | |
643 | ||
644 | err_exit: | |
645 | return retval; | |
646 | } | |
647 | ||
648 | ||
649 | static int power_off_slot(struct acpiphp_slot *slot) | |
650 | { | |
651 | acpi_status status; | |
652 | struct acpiphp_func *func; | |
1da177e4 LT |
653 | |
654 | int retval = 0; | |
655 | ||
656 | /* if already disabled, just skip */ | |
657 | if ((slot->flags & SLOT_POWEREDON) == 0) | |
658 | goto err_exit; | |
659 | ||
58c08628 | 660 | list_for_each_entry(func, &slot->funcs, sibling) { |
2f523b15 | 661 | if (func->flags & FUNC_HAS_PS3) { |
1da177e4 LT |
662 | status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); |
663 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 664 | warn("%s: _PS3 failed\n", __func__); |
1da177e4 LT |
665 | retval = -1; |
666 | goto err_exit; | |
667 | } else | |
668 | break; | |
669 | } | |
670 | } | |
671 | ||
1da177e4 LT |
672 | /* TBD: evaluate _STA to check if the slot is disabled */ |
673 | ||
674 | slot->flags &= (~SLOT_POWEREDON); | |
675 | ||
676 | err_exit: | |
677 | return retval; | |
678 | } | |
679 | ||
680 | ||
15a1ae74 KA |
681 | |
682 | /** | |
26e6c66e | 683 | * acpiphp_max_busnr - return the highest reserved bus number under the given bus. |
15a1ae74 | 684 | * @bus: bus to start search with |
15a1ae74 KA |
685 | */ |
686 | static unsigned char acpiphp_max_busnr(struct pci_bus *bus) | |
687 | { | |
688 | struct list_head *tmp; | |
689 | unsigned char max, n; | |
690 | ||
691 | /* | |
692 | * pci_bus_max_busnr will return the highest | |
693 | * reserved busnr for all these children. | |
694 | * that is equivalent to the bus->subordinate | |
695 | * value. We don't want to use the parent's | |
696 | * bus->subordinate value because it could have | |
697 | * padding in it. | |
698 | */ | |
b918c62e | 699 | max = bus->busn_res.start; |
15a1ae74 KA |
700 | |
701 | list_for_each(tmp, &bus->children) { | |
702 | n = pci_bus_max_busnr(pci_bus_b(tmp)); | |
703 | if (n > max) | |
704 | max = n; | |
705 | } | |
706 | return max; | |
707 | } | |
708 | ||
709 | ||
15a1ae74 KA |
710 | /** |
711 | * acpiphp_bus_add - add a new bus to acpi subsystem | |
712 | * @func: acpiphp_func of the bridge | |
15a1ae74 KA |
713 | */ |
714 | static int acpiphp_bus_add(struct acpiphp_func *func) | |
715 | { | |
716 | acpi_handle phandle; | |
717 | struct acpi_device *device, *pdevice; | |
718 | int ret_val; | |
719 | ||
720 | acpi_get_parent(func->handle, &phandle); | |
721 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
722 | dbg("no parent device, assuming NULL\n"); | |
723 | pdevice = NULL; | |
724 | } | |
20416ea5 KA |
725 | if (!acpi_bus_get_device(func->handle, &device)) { |
726 | dbg("bus exists... trim\n"); | |
727 | /* this shouldn't be in here, so remove | |
728 | * the bus then re-add it... | |
729 | */ | |
730 | ret_val = acpi_bus_trim(device, 1); | |
731 | dbg("acpi_bus_trim return %x\n", ret_val); | |
732 | } | |
733 | ||
734 | ret_val = acpi_bus_add(&device, pdevice, func->handle, | |
735 | ACPI_BUS_TYPE_DEVICE); | |
736 | if (ret_val) { | |
737 | dbg("error adding bus, %x\n", | |
738 | -ret_val); | |
739 | goto acpiphp_bus_add_out; | |
15a1ae74 | 740 | } |
15a1ae74 KA |
741 | ret_val = acpi_bus_start(device); |
742 | ||
743 | acpiphp_bus_add_out: | |
744 | return ret_val; | |
745 | } | |
746 | ||
747 | ||
92c9be95 MT |
748 | /** |
749 | * acpiphp_bus_trim - trim a bus from acpi subsystem | |
750 | * @handle: handle to acpi namespace | |
92c9be95 | 751 | */ |
6d47a5e4 | 752 | static int acpiphp_bus_trim(acpi_handle handle) |
92c9be95 MT |
753 | { |
754 | struct acpi_device *device; | |
755 | int retval; | |
756 | ||
757 | retval = acpi_bus_get_device(handle, &device); | |
758 | if (retval) { | |
759 | dbg("acpi_device not found\n"); | |
760 | return retval; | |
761 | } | |
762 | ||
763 | retval = acpi_bus_trim(device, 1); | |
764 | if (retval) | |
765 | err("cannot remove from acpi list\n"); | |
766 | ||
767 | return retval; | |
768 | } | |
15a1ae74 | 769 | |
d0607050 SL |
770 | static void acpiphp_set_acpi_region(struct acpiphp_slot *slot) |
771 | { | |
772 | struct acpiphp_func *func; | |
773 | union acpi_object params[2]; | |
774 | struct acpi_object_list arg_list; | |
775 | ||
776 | list_for_each_entry(func, &slot->funcs, sibling) { | |
777 | arg_list.count = 2; | |
778 | arg_list.pointer = params; | |
779 | params[0].type = ACPI_TYPE_INTEGER; | |
780 | params[0].integer.value = ACPI_ADR_SPACE_PCI_CONFIG; | |
781 | params[1].type = ACPI_TYPE_INTEGER; | |
782 | params[1].integer.value = 1; | |
783 | /* _REG is optional, we don't care about if there is failure */ | |
784 | acpi_evaluate_object(func->handle, "_REG", &arg_list, NULL); | |
785 | } | |
786 | } | |
787 | ||
1da177e4 LT |
788 | /** |
789 | * enable_device - enable, configure a slot | |
790 | * @slot: slot to be enabled | |
791 | * | |
792 | * This function should be called per *physical slot*, | |
793 | * not per each slot object in ACPI namespace. | |
1da177e4 | 794 | */ |
0ab2b57f | 795 | static int __ref enable_device(struct acpiphp_slot *slot) |
1da177e4 | 796 | { |
1da177e4 | 797 | struct pci_dev *dev; |
42f49a6a | 798 | struct pci_bus *bus = slot->bridge->pci_bus; |
1da177e4 LT |
799 | struct acpiphp_func *func; |
800 | int retval = 0; | |
42f49a6a | 801 | int num, max, pass; |
551bcb75 | 802 | acpi_status status; |
1da177e4 LT |
803 | |
804 | if (slot->flags & SLOT_ENABLED) | |
805 | goto err_exit; | |
806 | ||
42f49a6a RS |
807 | num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0)); |
808 | if (num == 0) { | |
f382a086 AK |
809 | /* Maybe only part of funcs are added. */ |
810 | dbg("No new device found\n"); | |
1da177e4 LT |
811 | goto err_exit; |
812 | } | |
813 | ||
15a1ae74 | 814 | max = acpiphp_max_busnr(bus); |
42f49a6a RS |
815 | for (pass = 0; pass < 2; pass++) { |
816 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
817 | if (PCI_SLOT(dev->devfn) != slot->device) | |
818 | continue; | |
819 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || | |
c64b5eea | 820 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
42f49a6a | 821 | max = pci_scan_bridge(bus, dev, max, pass); |
92c9be95 | 822 | if (pass && dev->subordinate) |
c64b5eea KA |
823 | pci_bus_size_bridges(dev->subordinate); |
824 | } | |
42f49a6a | 825 | } |
1da177e4 LT |
826 | } |
827 | ||
58c08628 | 828 | list_for_each_entry(func, &slot->funcs, sibling) |
92c9be95 | 829 | acpiphp_bus_add(func); |
92c9be95 | 830 | |
42f49a6a | 831 | pci_bus_assign_resources(bus); |
8e5dce35 | 832 | acpiphp_sanitize_bus(bus); |
fca6825a | 833 | acpiphp_set_hpp_values(bus); |
d0607050 | 834 | acpiphp_set_acpi_region(slot); |
8e5dce35 | 835 | pci_enable_bridges(bus); |
69643e48 IC |
836 | |
837 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
838 | /* Assume that newly added devices are powered on already. */ | |
839 | if (!dev->is_added) | |
840 | dev->current_state = PCI_D0; | |
841 | } | |
842 | ||
42f49a6a RS |
843 | pci_bus_add_devices(bus); |
844 | ||
f382a086 | 845 | slot->flags |= SLOT_ENABLED; |
58c08628 | 846 | list_for_each_entry(func, &slot->funcs, sibling) { |
9d911d79 AC |
847 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, |
848 | func->function)); | |
f382a086 AK |
849 | if (!dev) { |
850 | /* Do not set SLOT_ENABLED flag if some funcs | |
851 | are not added. */ | |
852 | slot->flags &= (~SLOT_ENABLED); | |
551bcb75 | 853 | continue; |
f382a086 | 854 | } |
551bcb75 | 855 | |
9d911d79 AC |
856 | if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE && |
857 | dev->hdr_type != PCI_HEADER_TYPE_CARDBUS) { | |
858 | pci_dev_put(dev); | |
551bcb75 | 859 | continue; |
9d911d79 | 860 | } |
551bcb75 MT |
861 | |
862 | status = find_p2p_bridge(func->handle, (u32)1, bus, NULL); | |
863 | if (ACPI_FAILURE(status)) | |
864 | warn("find_p2p_bridge failed (error code = 0x%x)\n", | |
865 | status); | |
9d911d79 | 866 | pci_dev_put(dev); |
1da177e4 LT |
867 | } |
868 | ||
1da177e4 | 869 | |
1da177e4 LT |
870 | err_exit: |
871 | return retval; | |
872 | } | |
873 | ||
ce29ca3e AK |
874 | /* return first device in slot, acquiring a reference on it */ |
875 | static struct pci_dev *dev_in_slot(struct acpiphp_slot *slot) | |
876 | { | |
877 | struct pci_bus *bus = slot->bridge->pci_bus; | |
878 | struct pci_dev *dev; | |
879 | struct pci_dev *ret = NULL; | |
880 | ||
881 | down_read(&pci_bus_sem); | |
882 | list_for_each_entry(dev, &bus->devices, bus_list) | |
883 | if (PCI_SLOT(dev->devfn) == slot->device) { | |
884 | ret = pci_dev_get(dev); | |
885 | break; | |
886 | } | |
887 | up_read(&pci_bus_sem); | |
888 | ||
889 | return ret; | |
890 | } | |
891 | ||
1da177e4 LT |
892 | /** |
893 | * disable_device - disable a slot | |
26e6c66e | 894 | * @slot: ACPI PHP slot |
1da177e4 LT |
895 | */ |
896 | static int disable_device(struct acpiphp_slot *slot) | |
897 | { | |
1da177e4 | 898 | struct acpiphp_func *func; |
9d911d79 | 899 | struct pci_dev *pdev; |
f382a086 | 900 | struct pci_bus *bus = slot->bridge->pci_bus; |
1da177e4 | 901 | |
f382a086 AK |
902 | /* The slot will be enabled when func 0 is added, so check |
903 | func 0 before disable the slot. */ | |
904 | pdev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0)); | |
905 | if (!pdev) | |
1da177e4 | 906 | goto err_exit; |
638f2933 | 907 | pci_dev_put(pdev); |
1da177e4 | 908 | |
9d911d79 | 909 | list_for_each_entry(func, &slot->funcs, sibling) { |
551bcb75 MT |
910 | if (func->bridge) { |
911 | /* cleanup p2p bridges under this P2P bridge */ | |
912 | cleanup_p2p_bridge(func->bridge->handle, | |
913 | (u32)1, NULL, NULL); | |
914 | func->bridge = NULL; | |
915 | } | |
ce29ca3e | 916 | } |
551bcb75 | 917 | |
ce29ca3e AK |
918 | /* |
919 | * enable_device() enumerates all functions in this device via | |
920 | * pci_scan_slot(), whether they have associated ACPI hotplug | |
921 | * methods (_EJ0, etc.) or not. Therefore, we remove all functions | |
922 | * here. | |
923 | */ | |
924 | while ((pdev = dev_in_slot(slot))) { | |
34e54843 | 925 | pci_stop_and_remove_bus_device(pdev); |
ce29ca3e | 926 | pci_dev_put(pdev); |
600812ec ST |
927 | } |
928 | ||
9d911d79 | 929 | list_for_each_entry(func, &slot->funcs, sibling) { |
92c9be95 | 930 | acpiphp_bus_trim(func->handle); |
1da177e4 LT |
931 | } |
932 | ||
933 | slot->flags &= (~SLOT_ENABLED); | |
934 | ||
9d911d79 AC |
935 | err_exit: |
936 | return 0; | |
1da177e4 LT |
937 | } |
938 | ||
939 | ||
940 | /** | |
941 | * get_slot_status - get ACPI slot status | |
26e6c66e | 942 | * @slot: ACPI PHP slot |
1da177e4 | 943 | * |
26e6c66e RD |
944 | * If a slot has _STA for each function and if any one of them |
945 | * returned non-zero status, return it. | |
1da177e4 | 946 | * |
26e6c66e RD |
947 | * If a slot doesn't have _STA and if any one of its functions' |
948 | * configuration space is configured, return 0x0f as a _STA. | |
1da177e4 | 949 | * |
26e6c66e | 950 | * Otherwise return 0. |
1da177e4 LT |
951 | */ |
952 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
953 | { | |
954 | acpi_status status; | |
27663c58 | 955 | unsigned long long sta = 0; |
1da177e4 | 956 | u32 dvid; |
1da177e4 LT |
957 | struct acpiphp_func *func; |
958 | ||
58c08628 | 959 | list_for_each_entry(func, &slot->funcs, sibling) { |
1da177e4 LT |
960 | if (func->flags & FUNC_HAS_STA) { |
961 | status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); | |
962 | if (ACPI_SUCCESS(status) && sta) | |
963 | break; | |
964 | } else { | |
965 | pci_bus_read_config_dword(slot->bridge->pci_bus, | |
966 | PCI_DEVFN(slot->device, | |
967 | func->function), | |
968 | PCI_VENDOR_ID, &dvid); | |
969 | if (dvid != 0xffffffff) { | |
970 | sta = ACPI_STA_ALL; | |
971 | break; | |
972 | } | |
973 | } | |
974 | } | |
975 | ||
976 | return (unsigned int)sta; | |
977 | } | |
978 | ||
8d50e332 RS |
979 | /** |
980 | * acpiphp_eject_slot - physically eject the slot | |
26e6c66e | 981 | * @slot: ACPI PHP slot |
8d50e332 | 982 | */ |
bfceafc5 | 983 | int acpiphp_eject_slot(struct acpiphp_slot *slot) |
8d50e332 RS |
984 | { |
985 | acpi_status status; | |
986 | struct acpiphp_func *func; | |
8d50e332 RS |
987 | struct acpi_object_list arg_list; |
988 | union acpi_object arg; | |
989 | ||
58c08628 | 990 | list_for_each_entry(func, &slot->funcs, sibling) { |
8d50e332 RS |
991 | /* We don't want to call _EJ0 on non-existing functions. */ |
992 | if ((func->flags & FUNC_HAS_EJ0)) { | |
993 | /* _EJ0 method take one argument */ | |
994 | arg_list.count = 1; | |
995 | arg_list.pointer = &arg; | |
996 | arg.type = ACPI_TYPE_INTEGER; | |
997 | arg.integer.value = 1; | |
998 | ||
999 | status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); | |
1000 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 1001 | warn("%s: _EJ0 failed\n", __func__); |
8d50e332 RS |
1002 | return -1; |
1003 | } else | |
1004 | break; | |
1005 | } | |
1006 | } | |
1007 | return 0; | |
1008 | } | |
1009 | ||
1da177e4 LT |
1010 | /** |
1011 | * acpiphp_check_bridge - re-enumerate devices | |
26e6c66e | 1012 | * @bridge: where to begin re-enumeration |
1da177e4 LT |
1013 | * |
1014 | * Iterate over all slots under this bridge and make sure that if a | |
1015 | * card is present they are enabled, and if not they are disabled. | |
1016 | */ | |
1017 | static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) | |
1018 | { | |
1019 | struct acpiphp_slot *slot; | |
1020 | int retval = 0; | |
1021 | int enabled, disabled; | |
1022 | ||
1023 | enabled = disabled = 0; | |
1024 | ||
1025 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1026 | unsigned int status = get_slot_status(slot); | |
1027 | if (slot->flags & SLOT_ENABLED) { | |
1028 | if (status == ACPI_STA_ALL) | |
1029 | continue; | |
1030 | retval = acpiphp_disable_slot(slot); | |
1031 | if (retval) { | |
1032 | err("Error occurred in disabling\n"); | |
1033 | goto err_exit; | |
8d50e332 RS |
1034 | } else { |
1035 | acpiphp_eject_slot(slot); | |
1da177e4 LT |
1036 | } |
1037 | disabled++; | |
1038 | } else { | |
1039 | if (status != ACPI_STA_ALL) | |
1040 | continue; | |
1041 | retval = acpiphp_enable_slot(slot); | |
1042 | if (retval) { | |
1043 | err("Error occurred in enabling\n"); | |
1044 | goto err_exit; | |
1045 | } | |
1046 | enabled++; | |
1047 | } | |
1048 | } | |
1049 | ||
66bef8c0 | 1050 | dbg("%s: %d enabled, %d disabled\n", __func__, enabled, disabled); |
1da177e4 LT |
1051 | |
1052 | err_exit: | |
1053 | return retval; | |
1054 | } | |
1055 | ||
fca6825a | 1056 | static void acpiphp_set_hpp_values(struct pci_bus *bus) |
8e7561cf | 1057 | { |
8e7561cf RS |
1058 | struct pci_dev *dev; |
1059 | ||
e81995bb BH |
1060 | list_for_each_entry(dev, &bus->devices, bus_list) |
1061 | pci_configure_slot(dev); | |
8e7561cf RS |
1062 | } |
1063 | ||
1064 | /* | |
1065 | * Remove devices for which we could not assign resources, call | |
1066 | * arch specific code to fix-up the bus | |
1067 | */ | |
1068 | static void acpiphp_sanitize_bus(struct pci_bus *bus) | |
1069 | { | |
1070 | struct pci_dev *dev; | |
1071 | int i; | |
1072 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; | |
1073 | ||
1074 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1075 | for (i=0; i<PCI_BRIDGE_RESOURCES; i++) { | |
1076 | struct resource *res = &dev->resource[i]; | |
1077 | if ((res->flags & type_mask) && !res->start && | |
1078 | res->end) { | |
1079 | /* Could not assign a required resources | |
1080 | * for this device, remove it */ | |
210647af | 1081 | pci_stop_and_remove_bus_device(dev); |
8e7561cf RS |
1082 | break; |
1083 | } | |
1084 | } | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | /* Program resources in newly inserted bridge */ | |
1089 | static int acpiphp_configure_bridge (acpi_handle handle) | |
1090 | { | |
7f538669 AC |
1091 | struct pci_bus *bus; |
1092 | ||
1093 | if (acpi_is_root_bridge(handle)) { | |
1094 | struct acpi_pci_root *root = acpi_pci_find_root(handle); | |
1095 | bus = root->bus; | |
1096 | } else { | |
1097 | struct pci_dev *pdev = acpi_get_pci_dev(handle); | |
1098 | bus = pdev->subordinate; | |
1099 | pci_dev_put(pdev); | |
1100 | } | |
8e7561cf RS |
1101 | |
1102 | pci_bus_size_bridges(bus); | |
1103 | pci_bus_assign_resources(bus); | |
1104 | acpiphp_sanitize_bus(bus); | |
fca6825a | 1105 | acpiphp_set_hpp_values(bus); |
8e7561cf RS |
1106 | pci_enable_bridges(bus); |
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | static void handle_bridge_insertion(acpi_handle handle, u32 type) | |
1111 | { | |
1112 | struct acpi_device *device, *pdevice; | |
1113 | acpi_handle phandle; | |
1114 | ||
1115 | if ((type != ACPI_NOTIFY_BUS_CHECK) && | |
1116 | (type != ACPI_NOTIFY_DEVICE_CHECK)) { | |
1117 | err("unexpected notification type %d\n", type); | |
1118 | return; | |
1119 | } | |
1120 | ||
1121 | acpi_get_parent(handle, &phandle); | |
1122 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1123 | dbg("no parent device, assuming NULL\n"); | |
1124 | pdevice = NULL; | |
1125 | } | |
1126 | if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) { | |
1127 | err("cannot add bridge to acpi list\n"); | |
1128 | return; | |
1129 | } | |
1130 | if (!acpiphp_configure_bridge(handle) && | |
1131 | !acpi_bus_start(device)) | |
1132 | add_bridge(handle); | |
1133 | else | |
1134 | err("cannot configure and start bridge\n"); | |
1135 | ||
1136 | } | |
1137 | ||
1da177e4 LT |
1138 | /* |
1139 | * ACPI event handlers | |
1140 | */ | |
1141 | ||
0bbd6424 GH |
1142 | static acpi_status |
1143 | count_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1144 | { | |
1145 | int *count = (int *)context; | |
1146 | struct acpiphp_bridge *bridge; | |
1147 | ||
1148 | bridge = acpiphp_handle_to_bridge(handle); | |
1149 | if (bridge) | |
1150 | (*count)++; | |
1151 | return AE_OK ; | |
1152 | } | |
1153 | ||
1154 | static acpi_status | |
1155 | check_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1156 | { | |
1157 | struct acpiphp_bridge *bridge; | |
1158 | char objname[64]; | |
1159 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1160 | .pointer = objname }; | |
1161 | ||
1162 | bridge = acpiphp_handle_to_bridge(handle); | |
1163 | if (bridge) { | |
1164 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1165 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1166 | __func__, objname); |
0bbd6424 GH |
1167 | acpiphp_check_bridge(bridge); |
1168 | } | |
1169 | return AE_OK ; | |
1170 | } | |
1171 | ||
6af8bef1 PB |
1172 | struct acpiphp_hp_work { |
1173 | struct work_struct work; | |
1174 | acpi_handle handle; | |
1175 | u32 type; | |
1176 | void *context; | |
1177 | }; | |
1178 | ||
1179 | static void alloc_acpiphp_hp_work(acpi_handle handle, u32 type, | |
1180 | void *context, | |
1181 | void (*func)(struct work_struct *work)) | |
1182 | { | |
1183 | struct acpiphp_hp_work *hp_work; | |
1184 | int ret; | |
1185 | ||
1186 | hp_work = kmalloc(sizeof(*hp_work), GFP_KERNEL); | |
1187 | if (!hp_work) | |
1188 | return; | |
1189 | ||
1190 | hp_work->handle = handle; | |
1191 | hp_work->type = type; | |
1192 | hp_work->context = context; | |
1193 | ||
1194 | INIT_WORK(&hp_work->work, func); | |
1195 | ret = queue_work(kacpi_hotplug_wq, &hp_work->work); | |
1196 | if (!ret) | |
1197 | kfree(hp_work); | |
1198 | } | |
1199 | ||
1200 | static void _handle_hotplug_event_bridge(struct work_struct *work) | |
1da177e4 LT |
1201 | { |
1202 | struct acpiphp_bridge *bridge; | |
1203 | char objname[64]; | |
1204 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1205 | .pointer = objname }; | |
8e7561cf | 1206 | struct acpi_device *device; |
0bbd6424 | 1207 | int num_sub_bridges = 0; |
6af8bef1 PB |
1208 | struct acpiphp_hp_work *hp_work; |
1209 | acpi_handle handle; | |
1210 | u32 type; | |
1211 | ||
1212 | hp_work = container_of(work, struct acpiphp_hp_work, work); | |
1213 | handle = hp_work->handle; | |
1214 | type = hp_work->type; | |
1da177e4 | 1215 | |
8e7561cf RS |
1216 | if (acpi_bus_get_device(handle, &device)) { |
1217 | /* This bridge must have just been physically inserted */ | |
1218 | handle_bridge_insertion(handle, type); | |
6af8bef1 | 1219 | goto out; |
8e7561cf RS |
1220 | } |
1221 | ||
1222 | bridge = acpiphp_handle_to_bridge(handle); | |
0bbd6424 GH |
1223 | if (type == ACPI_NOTIFY_BUS_CHECK) { |
1224 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, ACPI_UINT32_MAX, | |
2263576c | 1225 | count_sub_bridges, NULL, &num_sub_bridges, NULL); |
0bbd6424 GH |
1226 | } |
1227 | ||
1228 | if (!bridge && !num_sub_bridges) { | |
8e7561cf | 1229 | err("cannot get bridge info\n"); |
6af8bef1 | 1230 | goto out; |
8e7561cf | 1231 | } |
1da177e4 LT |
1232 | |
1233 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1234 | ||
1235 | switch (type) { | |
1236 | case ACPI_NOTIFY_BUS_CHECK: | |
1237 | /* bus re-enumerate */ | |
66bef8c0 | 1238 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
0bbd6424 GH |
1239 | if (bridge) { |
1240 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1241 | __func__, objname); |
0bbd6424 GH |
1242 | acpiphp_check_bridge(bridge); |
1243 | } | |
1244 | if (num_sub_bridges) | |
1245 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
2263576c | 1246 | ACPI_UINT32_MAX, check_sub_bridges, NULL, NULL, NULL); |
1da177e4 LT |
1247 | break; |
1248 | ||
1249 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1250 | /* device check */ | |
66bef8c0 | 1251 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1252 | acpiphp_check_bridge(bridge); |
1253 | break; | |
1254 | ||
1255 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1256 | /* wake event */ | |
66bef8c0 | 1257 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1258 | break; |
1259 | ||
1260 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1261 | /* request device eject */ | |
66bef8c0 | 1262 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
551bcb75 MT |
1263 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
1264 | (bridge->flags & BRIDGE_HAS_EJ0)) { | |
1265 | struct acpiphp_slot *slot; | |
1266 | slot = bridge->func->slot; | |
1267 | if (!acpiphp_disable_slot(slot)) | |
1268 | acpiphp_eject_slot(slot); | |
1269 | } | |
1da177e4 LT |
1270 | break; |
1271 | ||
1272 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1273 | printk(KERN_ERR "Device %s cannot be configured due" | |
1274 | " to a frequency mismatch\n", objname); | |
1275 | break; | |
1276 | ||
1277 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1278 | printk(KERN_ERR "Device %s cannot be configured due" | |
1279 | " to a bus mode mismatch\n", objname); | |
1280 | break; | |
1281 | ||
1282 | case ACPI_NOTIFY_POWER_FAULT: | |
1283 | printk(KERN_ERR "Device %s has suffered a power fault\n", | |
1284 | objname); | |
1285 | break; | |
1286 | ||
1287 | default: | |
1288 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1289 | break; | |
1290 | } | |
6af8bef1 PB |
1291 | |
1292 | out: | |
1293 | kfree(hp_work); /* allocated in handle_hotplug_event_bridge */ | |
1da177e4 LT |
1294 | } |
1295 | ||
1da177e4 | 1296 | /** |
6af8bef1 | 1297 | * handle_hotplug_event_bridge - handle ACPI event on bridges |
1da177e4 LT |
1298 | * @handle: Notify()'ed acpi_handle |
1299 | * @type: Notify code | |
6af8bef1 | 1300 | * @context: pointer to acpiphp_bridge structure |
1da177e4 | 1301 | * |
6af8bef1 | 1302 | * Handles ACPI event notification on {host,p2p} bridges. |
1da177e4 | 1303 | */ |
6af8bef1 PB |
1304 | static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, |
1305 | void *context) | |
1306 | { | |
1307 | /* | |
1308 | * Currently the code adds all hotplug events to the kacpid_wq | |
1309 | * queue when it should add hotplug events to the kacpi_hotplug_wq. | |
1310 | * The proper way to fix this is to reorganize the code so that | |
1311 | * drivers (dock, etc.) do not call acpi_os_execute(), etc. | |
1312 | * For now just re-add this work to the kacpi_hotplug_wq so we | |
1313 | * don't deadlock on hotplug actions. | |
1314 | */ | |
1315 | alloc_acpiphp_hp_work(handle, type, context, | |
1316 | _handle_hotplug_event_bridge); | |
1317 | } | |
1318 | ||
1319 | static void _handle_hotplug_event_func(struct work_struct *work) | |
1da177e4 LT |
1320 | { |
1321 | struct acpiphp_func *func; | |
1322 | char objname[64]; | |
1323 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1324 | .pointer = objname }; | |
6af8bef1 PB |
1325 | struct acpiphp_hp_work *hp_work; |
1326 | acpi_handle handle; | |
1327 | u32 type; | |
1328 | void *context; | |
1329 | ||
1330 | hp_work = container_of(work, struct acpiphp_hp_work, work); | |
1331 | handle = hp_work->handle; | |
1332 | type = hp_work->type; | |
1333 | context = hp_work->context; | |
1da177e4 LT |
1334 | |
1335 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1336 | ||
1337 | func = (struct acpiphp_func *)context; | |
1338 | ||
1339 | switch (type) { | |
1340 | case ACPI_NOTIFY_BUS_CHECK: | |
1341 | /* bus re-enumerate */ | |
66bef8c0 | 1342 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
1da177e4 LT |
1343 | acpiphp_enable_slot(func->slot); |
1344 | break; | |
1345 | ||
1346 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1347 | /* device check : re-enumerate from parent bus */ | |
66bef8c0 | 1348 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1349 | acpiphp_check_bridge(func->slot->bridge); |
1350 | break; | |
1351 | ||
1352 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1353 | /* wake event */ | |
66bef8c0 | 1354 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1355 | break; |
1356 | ||
1357 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1358 | /* request device eject */ | |
66bef8c0 | 1359 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
8d50e332 RS |
1360 | if (!(acpiphp_disable_slot(func->slot))) |
1361 | acpiphp_eject_slot(func->slot); | |
1da177e4 LT |
1362 | break; |
1363 | ||
1364 | default: | |
1365 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1366 | break; | |
1367 | } | |
6af8bef1 PB |
1368 | |
1369 | kfree(hp_work); /* allocated in handle_hotplug_event_func */ | |
1da177e4 LT |
1370 | } |
1371 | ||
6af8bef1 PB |
1372 | /** |
1373 | * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) | |
1374 | * @handle: Notify()'ed acpi_handle | |
1375 | * @type: Notify code | |
1376 | * @context: pointer to acpiphp_func structure | |
1377 | * | |
1378 | * Handles ACPI event notification on slots. | |
1379 | */ | |
1380 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, | |
1381 | void *context) | |
1382 | { | |
1383 | /* | |
1384 | * Currently the code adds all hotplug events to the kacpid_wq | |
1385 | * queue when it should add hotplug events to the kacpi_hotplug_wq. | |
1386 | * The proper way to fix this is to reorganize the code so that | |
1387 | * drivers (dock, etc.) do not call acpi_os_execute(), etc. | |
1388 | * For now just re-add this work to the kacpi_hotplug_wq so we | |
1389 | * don't deadlock on hotplug actions. | |
1390 | */ | |
1391 | alloc_acpiphp_hp_work(handle, type, context, | |
1392 | _handle_hotplug_event_func); | |
1393 | } | |
8e7561cf RS |
1394 | |
1395 | static acpi_status | |
1396 | find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1397 | { | |
1398 | int *count = (int *)context; | |
1399 | ||
0d52f54e RW |
1400 | if (!acpi_is_root_bridge(handle)) |
1401 | return AE_OK; | |
1402 | ||
0d52f54e RW |
1403 | (*count)++; |
1404 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
1405 | handle_hotplug_event_bridge, NULL); | |
1406 | ||
8e7561cf RS |
1407 | return AE_OK ; |
1408 | } | |
1da177e4 LT |
1409 | |
1410 | static struct acpi_pci_driver acpi_pci_hp_driver = { | |
1411 | .add = add_bridge, | |
1412 | .remove = remove_bridge, | |
1413 | }; | |
1414 | ||
1415 | /** | |
1416 | * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures | |
1da177e4 LT |
1417 | */ |
1418 | int __init acpiphp_glue_init(void) | |
1419 | { | |
8e7561cf | 1420 | int num = 0; |
1da177e4 | 1421 | |
8e7561cf | 1422 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
2263576c | 1423 | ACPI_UINT32_MAX, find_root_bridges, NULL, &num, NULL); |
1da177e4 LT |
1424 | |
1425 | if (num <= 0) | |
1426 | return -1; | |
8e7561cf RS |
1427 | else |
1428 | acpi_pci_register_driver(&acpi_pci_hp_driver); | |
1da177e4 LT |
1429 | |
1430 | return 0; | |
1431 | } | |
1432 | ||
1433 | ||
1434 | /** | |
1435 | * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures | |
1436 | * | |
26e6c66e | 1437 | * This function frees all data allocated in acpiphp_glue_init(). |
1da177e4 | 1438 | */ |
031f30d2 | 1439 | void acpiphp_glue_exit(void) |
1da177e4 | 1440 | { |
1da177e4 LT |
1441 | acpi_pci_unregister_driver(&acpi_pci_hp_driver); |
1442 | } | |
1443 | ||
1444 | ||
1445 | /** | |
1446 | * acpiphp_get_num_slots - count number of slots in a system | |
1447 | */ | |
1448 | int __init acpiphp_get_num_slots(void) | |
1449 | { | |
1da177e4 | 1450 | struct acpiphp_bridge *bridge; |
467c442f | 1451 | int num_slots = 0; |
1da177e4 | 1452 | |
58c08628 | 1453 | list_for_each_entry(bridge, &bridge_list, list) { |
42f49a6a RS |
1454 | dbg("Bus %04x:%02x has %d slot%s\n", |
1455 | pci_domain_nr(bridge->pci_bus), | |
1456 | bridge->pci_bus->number, bridge->nr_slots, | |
1457 | bridge->nr_slots == 1 ? "" : "s"); | |
1da177e4 LT |
1458 | num_slots += bridge->nr_slots; |
1459 | } | |
1460 | ||
42f49a6a | 1461 | dbg("Total %d slots\n", num_slots); |
1da177e4 LT |
1462 | return num_slots; |
1463 | } | |
1464 | ||
1465 | ||
1da177e4 LT |
1466 | /** |
1467 | * acpiphp_enable_slot - power on slot | |
26e6c66e | 1468 | * @slot: ACPI PHP slot |
1da177e4 LT |
1469 | */ |
1470 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
1471 | { | |
1472 | int retval; | |
1473 | ||
6aa4cdd0 | 1474 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1475 | |
1476 | /* wake up all functions */ | |
1477 | retval = power_on_slot(slot); | |
1478 | if (retval) | |
1479 | goto err_exit; | |
1480 | ||
cde0e5d7 | 1481 | if (get_slot_status(slot) == ACPI_STA_ALL) { |
1da177e4 LT |
1482 | /* configure all functions */ |
1483 | retval = enable_device(slot); | |
cde0e5d7 MT |
1484 | if (retval) |
1485 | power_off_slot(slot); | |
1486 | } else { | |
66bef8c0 | 1487 | dbg("%s: Slot status is not ACPI_STA_ALL\n", __func__); |
cde0e5d7 MT |
1488 | power_off_slot(slot); |
1489 | } | |
1da177e4 LT |
1490 | |
1491 | err_exit: | |
6aa4cdd0 | 1492 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1493 | return retval; |
1494 | } | |
1495 | ||
1da177e4 LT |
1496 | /** |
1497 | * acpiphp_disable_slot - power off slot | |
26e6c66e | 1498 | * @slot: ACPI PHP slot |
1da177e4 LT |
1499 | */ |
1500 | int acpiphp_disable_slot(struct acpiphp_slot *slot) | |
1501 | { | |
1502 | int retval = 0; | |
1503 | ||
6aa4cdd0 | 1504 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1505 | |
1506 | /* unconfigure all functions */ | |
1507 | retval = disable_device(slot); | |
1508 | if (retval) | |
1509 | goto err_exit; | |
1510 | ||
1511 | /* power off all functions */ | |
1512 | retval = power_off_slot(slot); | |
1513 | if (retval) | |
1514 | goto err_exit; | |
1515 | ||
1da177e4 | 1516 | err_exit: |
6aa4cdd0 | 1517 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1518 | return retval; |
1519 | } | |
1520 | ||
1521 | ||
1522 | /* | |
1523 | * slot enabled: 1 | |
1524 | * slot disabled: 0 | |
1525 | */ | |
1526 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
1527 | { | |
8d50e332 | 1528 | return (slot->flags & SLOT_POWEREDON); |
1da177e4 LT |
1529 | } |
1530 | ||
1531 | ||
1532 | /* | |
35ae61a0 MT |
1533 | * latch open: 1 |
1534 | * latch closed: 0 | |
1da177e4 LT |
1535 | */ |
1536 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1537 | { | |
1538 | unsigned int sta; | |
1539 | ||
1540 | sta = get_slot_status(slot); | |
1541 | ||
35ae61a0 | 1542 | return (sta & ACPI_STA_SHOW_IN_UI) ? 0 : 1; |
1da177e4 LT |
1543 | } |
1544 | ||
1545 | ||
1546 | /* | |
1547 | * adapter presence : 1 | |
1548 | * absence : 0 | |
1549 | */ | |
1550 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1551 | { | |
1552 | unsigned int sta; | |
1553 | ||
1554 | sta = get_slot_status(slot); | |
1555 | ||
1556 | return (sta == 0) ? 0 : 1; | |
1557 | } |