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> |
1da177e4 LT |
50 | |
51 | #include "../pci.h" | |
1da177e4 LT |
52 | #include "acpiphp.h" |
53 | ||
54 | static LIST_HEAD(bridge_list); | |
600812ec ST |
55 | static LIST_HEAD(ioapic_list); |
56 | static DEFINE_SPINLOCK(ioapic_list_lock); | |
1da177e4 LT |
57 | |
58 | #define MY_NAME "acpiphp_glue" | |
59 | ||
60 | static void handle_hotplug_event_bridge (acpi_handle, u32, void *); | |
8e5dce35 | 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 | ||
103 | if (((buses >> 8) & 0xff) != bus->secondary) { | |
104 | buses = (buses & 0xff000000) | |
2a9d3521 AC |
105 | | ((unsigned int)(bus->primary) << 0) |
106 | | ((unsigned int)(bus->secondary) << 8) | |
107 | | ((unsigned int)(bus->subordinate) << 16); | |
4e8662bb KA |
108 | pci_write_config_dword(bus->self, PCI_PRIMARY_BUS, buses); |
109 | } | |
110 | return NOTIFY_OK; | |
111 | } | |
112 | ||
113 | ||
1253f7aa SL |
114 | static struct acpi_dock_ops acpiphp_dock_ops = { |
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 | ||
56ee325e | 135 | acpi_evaluate_integer(handle, "_ADR", NULL, &adr); |
1da177e4 LT |
136 | device = (adr >> 16) & 0xffff; |
137 | function = adr & 0xffff; | |
138 | ||
f5afe806 | 139 | newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL); |
1da177e4 LT |
140 | if (!newfunc) |
141 | return AE_NO_MEMORY; | |
1da177e4 LT |
142 | |
143 | INIT_LIST_HEAD(&newfunc->sibling); | |
144 | newfunc->handle = handle; | |
145 | newfunc->function = function; | |
56ee325e MG |
146 | |
147 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp))) | |
20416ea5 | 148 | newfunc->flags = FUNC_HAS_EJ0; |
1da177e4 LT |
149 | |
150 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp))) | |
151 | newfunc->flags |= FUNC_HAS_STA; | |
152 | ||
153 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp))) | |
154 | newfunc->flags |= FUNC_HAS_PS0; | |
155 | ||
156 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) | |
157 | newfunc->flags |= FUNC_HAS_PS3; | |
158 | ||
4e8662bb | 159 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp))) |
20416ea5 | 160 | newfunc->flags |= FUNC_HAS_DCK; |
20416ea5 | 161 | |
1da177e4 | 162 | status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); |
95b38b3f KA |
163 | if (ACPI_FAILURE(status)) { |
164 | /* | |
165 | * use the count of the number of slots we've found | |
166 | * for the number of the slot | |
167 | */ | |
168 | sun = bridge->nr_slots+1; | |
169 | } | |
1da177e4 LT |
170 | |
171 | /* search for objects that share the same slot */ | |
172 | for (slot = bridge->slots; slot; slot = slot->next) | |
173 | if (slot->device == device) { | |
174 | if (slot->sun != sun) | |
175 | warn("sibling found, but _SUN doesn't match!\n"); | |
176 | break; | |
177 | } | |
178 | ||
179 | if (!slot) { | |
f5afe806 | 180 | slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); |
1da177e4 LT |
181 | if (!slot) { |
182 | kfree(newfunc); | |
183 | return AE_NO_MEMORY; | |
184 | } | |
185 | ||
1da177e4 | 186 | slot->bridge = bridge; |
1da177e4 LT |
187 | slot->device = device; |
188 | slot->sun = sun; | |
189 | INIT_LIST_HEAD(&slot->funcs); | |
6aa4cdd0 | 190 | mutex_init(&slot->crit_sect); |
1da177e4 LT |
191 | |
192 | slot->next = bridge->slots; | |
193 | bridge->slots = slot; | |
194 | ||
195 | bridge->nr_slots++; | |
196 | ||
b6adc195 | 197 | dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n", |
e8c331e9 | 198 | slot->sun, pci_domain_nr(pbus), pbus->number, device); |
e27da381 MT |
199 | retval = acpiphp_register_hotplug_slot(slot); |
200 | if (retval) { | |
f46753c5 | 201 | if (retval == -EBUSY) |
b6adc195 | 202 | warn("Slot %llu already registered by another " |
f46753c5 AC |
203 | "hotplug driver\n", slot->sun); |
204 | else | |
205 | warn("acpiphp_register_hotplug_slot failed " | |
206 | "(err code = 0x%x)\n", retval); | |
e27da381 MT |
207 | goto err_exit; |
208 | } | |
1da177e4 LT |
209 | } |
210 | ||
211 | newfunc->slot = slot; | |
212 | list_add_tail(&newfunc->sibling, &slot->funcs); | |
213 | ||
9d911d79 AC |
214 | pdev = pci_get_slot(pbus, PCI_DEVFN(device, function)); |
215 | if (pdev) { | |
1da177e4 | 216 | slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); |
9d911d79 | 217 | pci_dev_put(pdev); |
1da177e4 LT |
218 | } |
219 | ||
4e8662bb KA |
220 | if (is_dock_device(handle)) { |
221 | /* we don't want to call this device's _EJ0 | |
222 | * because we want the dock notify handler | |
223 | * to call it after it calls _DCK | |
20416ea5 KA |
224 | */ |
225 | newfunc->flags &= ~FUNC_HAS_EJ0; | |
4e8662bb | 226 | if (register_hotplug_dock_device(handle, |
1253f7aa | 227 | &acpiphp_dock_ops, newfunc)) |
4e8662bb KA |
228 | dbg("failed to register dock device\n"); |
229 | ||
230 | /* we need to be notified when dock events happen | |
231 | * outside of the hotplug operation, since we may | |
232 | * need to do fixups before we can hotplug. | |
233 | */ | |
234 | newfunc->nb.notifier_call = post_dock_fixups; | |
235 | if (register_dock_notifier(&newfunc->nb)) | |
236 | dbg("failed to register a dock notifier"); | |
20416ea5 KA |
237 | } |
238 | ||
1da177e4 | 239 | /* install notify handler */ |
20416ea5 KA |
240 | if (!(newfunc->flags & FUNC_HAS_DCK)) { |
241 | status = acpi_install_notify_handler(handle, | |
1da177e4 LT |
242 | ACPI_SYSTEM_NOTIFY, |
243 | handle_hotplug_event_func, | |
244 | newfunc); | |
245 | ||
20416ea5 KA |
246 | if (ACPI_FAILURE(status)) |
247 | err("failed to register interrupt notify handler\n"); | |
248 | } else | |
249 | status = AE_OK; | |
1da177e4 | 250 | |
20416ea5 | 251 | return status; |
e27da381 MT |
252 | |
253 | err_exit: | |
254 | bridge->nr_slots--; | |
255 | bridge->slots = slot->next; | |
256 | kfree(slot); | |
257 | kfree(newfunc); | |
258 | ||
259 | return AE_OK; | |
1da177e4 LT |
260 | } |
261 | ||
262 | ||
263 | /* see if it's worth looking at this bridge */ | |
6edd7679 | 264 | static int detect_ejectable_slots(acpi_handle handle) |
1da177e4 | 265 | { |
7f538669 | 266 | int found = acpi_pci_detect_ejectable(handle); |
e8c331e9 | 267 | if (!found) { |
6edd7679 | 268 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, |
e8c331e9 KK |
269 | is_pci_dock_device, (void *)&found, NULL); |
270 | } | |
271 | return found; | |
1da177e4 LT |
272 | } |
273 | ||
1da177e4 LT |
274 | /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */ |
275 | static void init_bridge_misc(struct acpiphp_bridge *bridge) | |
276 | { | |
277 | acpi_status status; | |
278 | ||
e27da381 MT |
279 | /* must be added to the list prior to calling register_slot */ |
280 | list_add(&bridge->list, &bridge_list); | |
281 | ||
1da177e4 LT |
282 | /* register all slot objects under this bridge */ |
283 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1, | |
284 | register_slot, bridge, NULL); | |
e27da381 MT |
285 | if (ACPI_FAILURE(status)) { |
286 | list_del(&bridge->list); | |
287 | return; | |
288 | } | |
1da177e4 LT |
289 | |
290 | /* install notify handler */ | |
8e7561cf | 291 | if (bridge->type != BRIDGE_TYPE_HOST) { |
551bcb75 MT |
292 | if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) { |
293 | status = acpi_remove_notify_handler(bridge->func->handle, | |
294 | ACPI_SYSTEM_NOTIFY, | |
295 | handle_hotplug_event_func); | |
296 | if (ACPI_FAILURE(status)) | |
297 | err("failed to remove notify handler\n"); | |
298 | } | |
8e7561cf | 299 | status = acpi_install_notify_handler(bridge->handle, |
1da177e4 LT |
300 | ACPI_SYSTEM_NOTIFY, |
301 | handle_hotplug_event_bridge, | |
302 | bridge); | |
303 | ||
8e7561cf RS |
304 | if (ACPI_FAILURE(status)) { |
305 | err("failed to register interrupt notify handler\n"); | |
306 | } | |
1da177e4 | 307 | } |
1da177e4 LT |
308 | } |
309 | ||
310 | ||
551bcb75 MT |
311 | /* find acpiphp_func from acpiphp_bridge */ |
312 | static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle) | |
313 | { | |
314 | struct list_head *node, *l; | |
315 | struct acpiphp_bridge *bridge; | |
316 | struct acpiphp_slot *slot; | |
317 | struct acpiphp_func *func; | |
318 | ||
319 | list_for_each(node, &bridge_list) { | |
320 | bridge = list_entry(node, struct acpiphp_bridge, list); | |
321 | for (slot = bridge->slots; slot; slot = slot->next) { | |
322 | list_for_each(l, &slot->funcs) { | |
323 | func = list_entry(l, struct acpiphp_func, | |
324 | sibling); | |
325 | if (func->handle == handle) | |
326 | return func; | |
327 | } | |
328 | } | |
329 | } | |
330 | ||
331 | return NULL; | |
332 | } | |
333 | ||
334 | ||
335 | static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge) | |
336 | { | |
337 | acpi_handle dummy_handle; | |
338 | ||
339 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
340 | "_STA", &dummy_handle))) | |
341 | bridge->flags |= BRIDGE_HAS_STA; | |
342 | ||
343 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
344 | "_EJ0", &dummy_handle))) | |
345 | bridge->flags |= BRIDGE_HAS_EJ0; | |
346 | ||
347 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
348 | "_PS0", &dummy_handle))) | |
349 | bridge->flags |= BRIDGE_HAS_PS0; | |
350 | ||
351 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
352 | "_PS3", &dummy_handle))) | |
353 | bridge->flags |= BRIDGE_HAS_PS3; | |
354 | ||
355 | /* is this ejectable p2p bridge? */ | |
356 | if (bridge->flags & BRIDGE_HAS_EJ0) { | |
357 | struct acpiphp_func *func; | |
358 | ||
359 | dbg("found ejectable p2p bridge\n"); | |
360 | ||
361 | /* make link between PCI bridge and PCI function */ | |
362 | func = acpiphp_bridge_handle_to_function(bridge->handle); | |
363 | if (!func) | |
364 | return; | |
365 | bridge->func = func; | |
366 | func->bridge = bridge; | |
367 | } | |
368 | } | |
369 | ||
370 | ||
1da177e4 | 371 | /* allocate and initialize host bridge data structure */ |
6edd7679 | 372 | static void add_host_bridge(acpi_handle *handle) |
1da177e4 | 373 | { |
1da177e4 | 374 | struct acpiphp_bridge *bridge; |
6edd7679 | 375 | struct acpi_pci_root *root = acpi_pci_find_root(handle); |
1da177e4 | 376 | |
f5afe806 | 377 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
378 | if (bridge == NULL) |
379 | return; | |
380 | ||
1da177e4 LT |
381 | bridge->type = BRIDGE_TYPE_HOST; |
382 | bridge->handle = handle; | |
1da177e4 | 383 | |
6edd7679 | 384 | bridge->pci_bus = root->bus; |
1da177e4 LT |
385 | |
386 | spin_lock_init(&bridge->res_lock); | |
387 | ||
1da177e4 LT |
388 | init_bridge_misc(bridge); |
389 | } | |
390 | ||
391 | ||
392 | /* allocate and initialize PCI-to-PCI bridge data structure */ | |
6edd7679 | 393 | static void add_p2p_bridge(acpi_handle *handle) |
1da177e4 LT |
394 | { |
395 | struct acpiphp_bridge *bridge; | |
1da177e4 | 396 | |
f5afe806 | 397 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
398 | if (bridge == NULL) { |
399 | err("out of memory\n"); | |
400 | return; | |
401 | } | |
402 | ||
1da177e4 LT |
403 | bridge->type = BRIDGE_TYPE_P2P; |
404 | bridge->handle = handle; | |
551bcb75 | 405 | config_p2p_bridge_flags(bridge); |
1da177e4 | 406 | |
6edd7679 AC |
407 | bridge->pci_dev = acpi_get_pci_dev(handle); |
408 | bridge->pci_bus = bridge->pci_dev->subordinate; | |
1da177e4 LT |
409 | if (!bridge->pci_bus) { |
410 | err("This is not a PCI-to-PCI bridge!\n"); | |
42f49a6a | 411 | goto err; |
1da177e4 LT |
412 | } |
413 | ||
5d4a4b25 AC |
414 | /* |
415 | * Grab a ref to the subordinate PCI bus in case the bus is | |
416 | * removed via PCI core logical hotplug. The ref pins the bus | |
417 | * (which we access during module unload). | |
418 | */ | |
419 | get_device(&bridge->pci_bus->dev); | |
1da177e4 LT |
420 | spin_lock_init(&bridge->res_lock); |
421 | ||
1da177e4 | 422 | init_bridge_misc(bridge); |
42f49a6a RS |
423 | return; |
424 | err: | |
6edd7679 | 425 | pci_dev_put(bridge->pci_dev); |
42f49a6a RS |
426 | kfree(bridge); |
427 | return; | |
1da177e4 LT |
428 | } |
429 | ||
430 | ||
431 | /* callback routine to find P2P bridges */ | |
432 | static acpi_status | |
433 | find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
434 | { | |
435 | acpi_status status; | |
1da177e4 | 436 | struct pci_dev *dev; |
1da177e4 | 437 | |
6edd7679 | 438 | dev = acpi_get_pci_dev(handle); |
42f49a6a RS |
439 | if (!dev || !dev->subordinate) |
440 | goto out; | |
1da177e4 LT |
441 | |
442 | /* check if this bridge has ejectable slots */ | |
6edd7679 | 443 | if ((detect_ejectable_slots(handle) > 0)) { |
1da177e4 | 444 | dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); |
6edd7679 | 445 | add_p2p_bridge(handle); |
1da177e4 LT |
446 | } |
447 | ||
7c8f25da KK |
448 | /* search P2P bridges under this p2p bridge */ |
449 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
6edd7679 | 450 | find_p2p_bridge, NULL, NULL); |
7c8f25da | 451 | if (ACPI_FAILURE(status)) |
551bcb75 | 452 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
7c8f25da | 453 | |
42f49a6a RS |
454 | out: |
455 | pci_dev_put(dev); | |
1da177e4 LT |
456 | return AE_OK; |
457 | } | |
458 | ||
459 | ||
460 | /* find hot-pluggable slots, and then find P2P bridge */ | |
461 | static int add_bridge(acpi_handle handle) | |
462 | { | |
463 | acpi_status status; | |
27663c58 | 464 | unsigned long long tmp; |
1da177e4 LT |
465 | acpi_handle dummy_handle; |
466 | ||
467 | /* if the bridge doesn't have _STA, we assume it is always there */ | |
468 | status = acpi_get_handle(handle, "_STA", &dummy_handle); | |
469 | if (ACPI_SUCCESS(status)) { | |
470 | status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp); | |
471 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 472 | dbg("%s: _STA evaluation failure\n", __func__); |
1da177e4 LT |
473 | return 0; |
474 | } | |
475 | if ((tmp & ACPI_STA_FUNCTIONING) == 0) | |
476 | /* don't register this object */ | |
477 | return 0; | |
478 | } | |
479 | ||
1da177e4 | 480 | /* check if this bridge has ejectable slots */ |
6edd7679 | 481 | if (detect_ejectable_slots(handle) > 0) { |
1da177e4 | 482 | dbg("found PCI host-bus bridge with hot-pluggable slots\n"); |
6edd7679 | 483 | add_host_bridge(handle); |
1da177e4 LT |
484 | } |
485 | ||
1da177e4 LT |
486 | /* search P2P bridges under this host bridge */ |
487 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
6edd7679 | 488 | find_p2p_bridge, NULL, NULL); |
1da177e4 LT |
489 | |
490 | if (ACPI_FAILURE(status)) | |
551bcb75 | 491 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
1da177e4 LT |
492 | |
493 | return 0; | |
494 | } | |
495 | ||
42f49a6a RS |
496 | static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle) |
497 | { | |
498 | struct list_head *head; | |
499 | list_for_each(head, &bridge_list) { | |
500 | struct acpiphp_bridge *bridge = list_entry(head, | |
501 | struct acpiphp_bridge, list); | |
502 | if (bridge->handle == handle) | |
503 | return bridge; | |
504 | } | |
505 | ||
506 | return NULL; | |
507 | } | |
1da177e4 | 508 | |
364d5094 | 509 | static void cleanup_bridge(struct acpiphp_bridge *bridge) |
1da177e4 | 510 | { |
42f49a6a | 511 | struct list_head *list, *tmp; |
42f49a6a RS |
512 | struct acpiphp_slot *slot; |
513 | acpi_status status; | |
364d5094 | 514 | acpi_handle handle = bridge->handle; |
42f49a6a RS |
515 | |
516 | status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
517 | handle_hotplug_event_bridge); | |
518 | if (ACPI_FAILURE(status)) | |
519 | err("failed to remove notify handler\n"); | |
520 | ||
551bcb75 MT |
521 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
522 | ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) { | |
523 | status = acpi_install_notify_handler(bridge->func->handle, | |
524 | ACPI_SYSTEM_NOTIFY, | |
525 | handle_hotplug_event_func, | |
526 | bridge->func); | |
527 | if (ACPI_FAILURE(status)) | |
528 | err("failed to install interrupt notify handler\n"); | |
529 | } | |
530 | ||
42f49a6a RS |
531 | slot = bridge->slots; |
532 | while (slot) { | |
533 | struct acpiphp_slot *next = slot->next; | |
534 | list_for_each_safe (list, tmp, &slot->funcs) { | |
535 | struct acpiphp_func *func; | |
536 | func = list_entry(list, struct acpiphp_func, sibling); | |
4e8662bb KA |
537 | if (is_dock_device(func->handle)) { |
538 | unregister_hotplug_dock_device(func->handle); | |
539 | unregister_dock_notifier(&func->nb); | |
540 | } | |
20416ea5 KA |
541 | if (!(func->flags & FUNC_HAS_DCK)) { |
542 | status = acpi_remove_notify_handler(func->handle, | |
42f49a6a RS |
543 | ACPI_SYSTEM_NOTIFY, |
544 | handle_hotplug_event_func); | |
20416ea5 KA |
545 | if (ACPI_FAILURE(status)) |
546 | err("failed to remove notify handler\n"); | |
547 | } | |
42f49a6a RS |
548 | list_del(list); |
549 | kfree(func); | |
550 | } | |
e27da381 MT |
551 | acpiphp_unregister_hotplug_slot(slot); |
552 | list_del(&slot->funcs); | |
42f49a6a RS |
553 | kfree(slot); |
554 | slot = next; | |
555 | } | |
556 | ||
5d4a4b25 AC |
557 | /* |
558 | * Only P2P bridges have a pci_dev | |
559 | */ | |
560 | if (bridge->pci_dev) | |
561 | put_device(&bridge->pci_bus->dev); | |
562 | ||
42f49a6a RS |
563 | pci_dev_put(bridge->pci_dev); |
564 | list_del(&bridge->list); | |
565 | kfree(bridge); | |
1da177e4 LT |
566 | } |
567 | ||
364d5094 RS |
568 | static acpi_status |
569 | cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
570 | { | |
571 | struct acpiphp_bridge *bridge; | |
572 | ||
551bcb75 MT |
573 | /* cleanup p2p bridges under this P2P bridge |
574 | in a depth-first manner */ | |
575 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
576 | cleanup_p2p_bridge, NULL, NULL); | |
577 | ||
a13307ce AC |
578 | bridge = acpiphp_handle_to_bridge(handle); |
579 | if (bridge) | |
580 | cleanup_bridge(bridge); | |
581 | ||
364d5094 RS |
582 | return AE_OK; |
583 | } | |
584 | ||
585 | static void remove_bridge(acpi_handle handle) | |
586 | { | |
587 | struct acpiphp_bridge *bridge; | |
588 | ||
551bcb75 MT |
589 | /* cleanup p2p bridges under this host bridge |
590 | in a depth-first manner */ | |
591 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
592 | (u32)1, cleanup_p2p_bridge, NULL, NULL); | |
593 | ||
a13307ce AC |
594 | /* |
595 | * On root bridges with hotplug slots directly underneath (ie, | |
596 | * no p2p bridge inbetween), we call cleanup_bridge(). | |
597 | * | |
598 | * The else clause cleans up root bridges that either had no | |
599 | * hotplug slots at all, or had a p2p bridge underneath. | |
600 | */ | |
364d5094 | 601 | bridge = acpiphp_handle_to_bridge(handle); |
551bcb75 | 602 | if (bridge) |
364d5094 | 603 | cleanup_bridge(bridge); |
a13307ce AC |
604 | else |
605 | acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
606 | handle_hotplug_event_bridge); | |
364d5094 | 607 | } |
1da177e4 | 608 | |
a0d399a8 KK |
609 | static struct pci_dev * get_apic_pci_info(acpi_handle handle) |
610 | { | |
a0d399a8 KK |
611 | struct pci_dev *dev; |
612 | ||
d6aa484c | 613 | dev = acpi_get_pci_dev(handle); |
a0d399a8 KK |
614 | if (!dev) |
615 | return NULL; | |
616 | ||
617 | if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) && | |
618 | (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC)) | |
619 | { | |
620 | pci_dev_put(dev); | |
621 | return NULL; | |
622 | } | |
623 | ||
624 | return dev; | |
625 | } | |
626 | ||
627 | static int get_gsi_base(acpi_handle handle, u32 *gsi_base) | |
628 | { | |
629 | acpi_status status; | |
630 | int result = -1; | |
27663c58 | 631 | unsigned long long gsb; |
a0d399a8 KK |
632 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
633 | union acpi_object *obj; | |
634 | void *table; | |
635 | ||
636 | status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb); | |
637 | if (ACPI_SUCCESS(status)) { | |
638 | *gsi_base = (u32)gsb; | |
639 | return 0; | |
640 | } | |
641 | ||
642 | status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer); | |
643 | if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer) | |
644 | return -1; | |
645 | ||
646 | obj = buffer.pointer; | |
647 | if (obj->type != ACPI_TYPE_BUFFER) | |
648 | goto out; | |
649 | ||
650 | table = obj->buffer.pointer; | |
15a58ed1 AS |
651 | switch (((struct acpi_subtable_header *)table)->type) { |
652 | case ACPI_MADT_TYPE_IO_SAPIC: | |
653 | *gsi_base = ((struct acpi_madt_io_sapic *)table)->global_irq_base; | |
a0d399a8 KK |
654 | result = 0; |
655 | break; | |
15a58ed1 AS |
656 | case ACPI_MADT_TYPE_IO_APIC: |
657 | *gsi_base = ((struct acpi_madt_io_apic *)table)->global_irq_base; | |
a0d399a8 KK |
658 | result = 0; |
659 | break; | |
660 | default: | |
661 | break; | |
662 | } | |
663 | out: | |
81b26bca | 664 | kfree(buffer.pointer); |
a0d399a8 KK |
665 | return result; |
666 | } | |
667 | ||
668 | static acpi_status | |
669 | ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv) | |
670 | { | |
671 | acpi_status status; | |
27663c58 | 672 | unsigned long long sta; |
a0d399a8 KK |
673 | acpi_handle tmp; |
674 | struct pci_dev *pdev; | |
675 | u32 gsi_base; | |
676 | u64 phys_addr; | |
600812ec | 677 | struct acpiphp_ioapic *ioapic; |
a0d399a8 KK |
678 | |
679 | /* Evaluate _STA if present */ | |
680 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
681 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
682 | return AE_CTRL_DEPTH; | |
683 | ||
684 | /* Scan only PCI bus scope */ | |
685 | status = acpi_get_handle(handle, "_HID", &tmp); | |
686 | if (ACPI_SUCCESS(status)) | |
687 | return AE_CTRL_DEPTH; | |
688 | ||
689 | if (get_gsi_base(handle, &gsi_base)) | |
690 | return AE_OK; | |
691 | ||
600812ec ST |
692 | ioapic = kmalloc(sizeof(*ioapic), GFP_KERNEL); |
693 | if (!ioapic) | |
694 | return AE_NO_MEMORY; | |
695 | ||
a0d399a8 KK |
696 | pdev = get_apic_pci_info(handle); |
697 | if (!pdev) | |
600812ec | 698 | goto exit_kfree; |
a0d399a8 | 699 | |
600812ec ST |
700 | if (pci_enable_device(pdev)) |
701 | goto exit_pci_dev_put; | |
a0d399a8 KK |
702 | |
703 | pci_set_master(pdev); | |
704 | ||
600812ec ST |
705 | if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)")) |
706 | goto exit_pci_disable_device; | |
a0d399a8 KK |
707 | |
708 | phys_addr = pci_resource_start(pdev, 0); | |
600812ec ST |
709 | if (acpi_register_ioapic(handle, phys_addr, gsi_base)) |
710 | goto exit_pci_release_region; | |
711 | ||
712 | ioapic->gsi_base = gsi_base; | |
713 | ioapic->dev = pdev; | |
714 | spin_lock(&ioapic_list_lock); | |
715 | list_add_tail(&ioapic->list, &ioapic_list); | |
716 | spin_unlock(&ioapic_list_lock); | |
717 | ||
718 | return AE_OK; | |
719 | ||
720 | exit_pci_release_region: | |
721 | pci_release_region(pdev, 0); | |
722 | exit_pci_disable_device: | |
723 | pci_disable_device(pdev); | |
724 | exit_pci_dev_put: | |
725 | pci_dev_put(pdev); | |
726 | exit_kfree: | |
727 | kfree(ioapic); | |
728 | ||
729 | return AE_OK; | |
730 | } | |
731 | ||
732 | static acpi_status | |
733 | ioapic_remove(acpi_handle handle, u32 lvl, void *context, void **rv) | |
734 | { | |
735 | acpi_status status; | |
27663c58 | 736 | unsigned long long sta; |
600812ec ST |
737 | acpi_handle tmp; |
738 | u32 gsi_base; | |
739 | struct acpiphp_ioapic *pos, *n, *ioapic = NULL; | |
740 | ||
741 | /* Evaluate _STA if present */ | |
742 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
743 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
744 | return AE_CTRL_DEPTH; | |
745 | ||
746 | /* Scan only PCI bus scope */ | |
747 | status = acpi_get_handle(handle, "_HID", &tmp); | |
748 | if (ACPI_SUCCESS(status)) | |
749 | return AE_CTRL_DEPTH; | |
750 | ||
751 | if (get_gsi_base(handle, &gsi_base)) | |
a0d399a8 | 752 | return AE_OK; |
600812ec ST |
753 | |
754 | acpi_unregister_ioapic(handle, gsi_base); | |
755 | ||
756 | spin_lock(&ioapic_list_lock); | |
757 | list_for_each_entry_safe(pos, n, &ioapic_list, list) { | |
758 | if (pos->gsi_base != gsi_base) | |
759 | continue; | |
760 | ioapic = pos; | |
761 | list_del(&ioapic->list); | |
762 | break; | |
a0d399a8 | 763 | } |
600812ec ST |
764 | spin_unlock(&ioapic_list_lock); |
765 | ||
766 | if (!ioapic) | |
767 | return AE_OK; | |
768 | ||
769 | pci_release_region(ioapic->dev, 0); | |
770 | pci_disable_device(ioapic->dev); | |
771 | pci_dev_put(ioapic->dev); | |
772 | kfree(ioapic); | |
a0d399a8 KK |
773 | |
774 | return AE_OK; | |
775 | } | |
776 | ||
777 | static int acpiphp_configure_ioapics(acpi_handle handle) | |
778 | { | |
9b1d19ee | 779 | ioapic_add(handle, 0, NULL, NULL); |
a0d399a8 KK |
780 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, |
781 | ACPI_UINT32_MAX, ioapic_add, NULL, NULL); | |
782 | return 0; | |
783 | } | |
784 | ||
600812ec ST |
785 | static int acpiphp_unconfigure_ioapics(acpi_handle handle) |
786 | { | |
787 | ioapic_remove(handle, 0, NULL, NULL); | |
788 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
789 | ACPI_UINT32_MAX, ioapic_remove, NULL, NULL); | |
790 | return 0; | |
791 | } | |
792 | ||
1da177e4 LT |
793 | static int power_on_slot(struct acpiphp_slot *slot) |
794 | { | |
795 | acpi_status status; | |
796 | struct acpiphp_func *func; | |
797 | struct list_head *l; | |
798 | int retval = 0; | |
799 | ||
800 | /* if already enabled, just skip */ | |
801 | if (slot->flags & SLOT_POWEREDON) | |
802 | goto err_exit; | |
803 | ||
804 | list_for_each (l, &slot->funcs) { | |
805 | func = list_entry(l, struct acpiphp_func, sibling); | |
806 | ||
807 | if (func->flags & FUNC_HAS_PS0) { | |
66bef8c0 | 808 | dbg("%s: executing _PS0\n", __func__); |
1da177e4 LT |
809 | status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); |
810 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 811 | warn("%s: _PS0 failed\n", __func__); |
1da177e4 LT |
812 | retval = -1; |
813 | goto err_exit; | |
814 | } else | |
815 | break; | |
816 | } | |
817 | } | |
818 | ||
819 | /* TBD: evaluate _STA to check if the slot is enabled */ | |
820 | ||
821 | slot->flags |= SLOT_POWEREDON; | |
822 | ||
823 | err_exit: | |
824 | return retval; | |
825 | } | |
826 | ||
827 | ||
828 | static int power_off_slot(struct acpiphp_slot *slot) | |
829 | { | |
830 | acpi_status status; | |
831 | struct acpiphp_func *func; | |
832 | struct list_head *l; | |
1da177e4 LT |
833 | |
834 | int retval = 0; | |
835 | ||
836 | /* if already disabled, just skip */ | |
837 | if ((slot->flags & SLOT_POWEREDON) == 0) | |
838 | goto err_exit; | |
839 | ||
840 | list_for_each (l, &slot->funcs) { | |
841 | func = list_entry(l, struct acpiphp_func, sibling); | |
842 | ||
2f523b15 | 843 | if (func->flags & FUNC_HAS_PS3) { |
1da177e4 LT |
844 | status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); |
845 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 846 | warn("%s: _PS3 failed\n", __func__); |
1da177e4 LT |
847 | retval = -1; |
848 | goto err_exit; | |
849 | } else | |
850 | break; | |
851 | } | |
852 | } | |
853 | ||
1da177e4 LT |
854 | /* TBD: evaluate _STA to check if the slot is disabled */ |
855 | ||
856 | slot->flags &= (~SLOT_POWEREDON); | |
857 | ||
858 | err_exit: | |
859 | return retval; | |
860 | } | |
861 | ||
862 | ||
15a1ae74 KA |
863 | |
864 | /** | |
26e6c66e | 865 | * acpiphp_max_busnr - return the highest reserved bus number under the given bus. |
15a1ae74 | 866 | * @bus: bus to start search with |
15a1ae74 KA |
867 | */ |
868 | static unsigned char acpiphp_max_busnr(struct pci_bus *bus) | |
869 | { | |
870 | struct list_head *tmp; | |
871 | unsigned char max, n; | |
872 | ||
873 | /* | |
874 | * pci_bus_max_busnr will return the highest | |
875 | * reserved busnr for all these children. | |
876 | * that is equivalent to the bus->subordinate | |
877 | * value. We don't want to use the parent's | |
878 | * bus->subordinate value because it could have | |
879 | * padding in it. | |
880 | */ | |
881 | max = bus->secondary; | |
882 | ||
883 | list_for_each(tmp, &bus->children) { | |
884 | n = pci_bus_max_busnr(pci_bus_b(tmp)); | |
885 | if (n > max) | |
886 | max = n; | |
887 | } | |
888 | return max; | |
889 | } | |
890 | ||
891 | ||
15a1ae74 KA |
892 | /** |
893 | * acpiphp_bus_add - add a new bus to acpi subsystem | |
894 | * @func: acpiphp_func of the bridge | |
15a1ae74 KA |
895 | */ |
896 | static int acpiphp_bus_add(struct acpiphp_func *func) | |
897 | { | |
898 | acpi_handle phandle; | |
899 | struct acpi_device *device, *pdevice; | |
900 | int ret_val; | |
901 | ||
902 | acpi_get_parent(func->handle, &phandle); | |
903 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
904 | dbg("no parent device, assuming NULL\n"); | |
905 | pdevice = NULL; | |
906 | } | |
20416ea5 KA |
907 | if (!acpi_bus_get_device(func->handle, &device)) { |
908 | dbg("bus exists... trim\n"); | |
909 | /* this shouldn't be in here, so remove | |
910 | * the bus then re-add it... | |
911 | */ | |
912 | ret_val = acpi_bus_trim(device, 1); | |
913 | dbg("acpi_bus_trim return %x\n", ret_val); | |
914 | } | |
915 | ||
916 | ret_val = acpi_bus_add(&device, pdevice, func->handle, | |
917 | ACPI_BUS_TYPE_DEVICE); | |
918 | if (ret_val) { | |
919 | dbg("error adding bus, %x\n", | |
920 | -ret_val); | |
921 | goto acpiphp_bus_add_out; | |
15a1ae74 KA |
922 | } |
923 | /* | |
924 | * try to start anyway. We could have failed to add | |
925 | * simply because this bus had previously been added | |
926 | * on another add. Don't bother with the return value | |
927 | * we just keep going. | |
928 | */ | |
929 | ret_val = acpi_bus_start(device); | |
930 | ||
931 | acpiphp_bus_add_out: | |
932 | return ret_val; | |
933 | } | |
934 | ||
935 | ||
92c9be95 MT |
936 | /** |
937 | * acpiphp_bus_trim - trim a bus from acpi subsystem | |
938 | * @handle: handle to acpi namespace | |
92c9be95 | 939 | */ |
6d47a5e4 | 940 | static int acpiphp_bus_trim(acpi_handle handle) |
92c9be95 MT |
941 | { |
942 | struct acpi_device *device; | |
943 | int retval; | |
944 | ||
945 | retval = acpi_bus_get_device(handle, &device); | |
946 | if (retval) { | |
947 | dbg("acpi_device not found\n"); | |
948 | return retval; | |
949 | } | |
950 | ||
951 | retval = acpi_bus_trim(device, 1); | |
952 | if (retval) | |
953 | err("cannot remove from acpi list\n"); | |
954 | ||
955 | return retval; | |
956 | } | |
15a1ae74 | 957 | |
1da177e4 LT |
958 | /** |
959 | * enable_device - enable, configure a slot | |
960 | * @slot: slot to be enabled | |
961 | * | |
962 | * This function should be called per *physical slot*, | |
963 | * not per each slot object in ACPI namespace. | |
1da177e4 | 964 | */ |
0ab2b57f | 965 | static int __ref enable_device(struct acpiphp_slot *slot) |
1da177e4 | 966 | { |
1da177e4 | 967 | struct pci_dev *dev; |
42f49a6a | 968 | struct pci_bus *bus = slot->bridge->pci_bus; |
1da177e4 LT |
969 | struct list_head *l; |
970 | struct acpiphp_func *func; | |
971 | int retval = 0; | |
42f49a6a | 972 | int num, max, pass; |
551bcb75 | 973 | acpi_status status; |
1da177e4 LT |
974 | |
975 | if (slot->flags & SLOT_ENABLED) | |
976 | goto err_exit; | |
977 | ||
978 | /* sanity check: dev should be NULL when hot-plugged in */ | |
42f49a6a | 979 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0)); |
1da177e4 LT |
980 | if (dev) { |
981 | /* This case shouldn't happen */ | |
982 | err("pci_dev structure already exists.\n"); | |
42f49a6a | 983 | pci_dev_put(dev); |
1da177e4 LT |
984 | retval = -1; |
985 | goto err_exit; | |
986 | } | |
987 | ||
42f49a6a RS |
988 | num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0)); |
989 | if (num == 0) { | |
1da177e4 LT |
990 | err("No new device found\n"); |
991 | retval = -1; | |
992 | goto err_exit; | |
993 | } | |
994 | ||
15a1ae74 | 995 | max = acpiphp_max_busnr(bus); |
42f49a6a RS |
996 | for (pass = 0; pass < 2; pass++) { |
997 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
998 | if (PCI_SLOT(dev->devfn) != slot->device) | |
999 | continue; | |
1000 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || | |
c64b5eea | 1001 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
42f49a6a | 1002 | max = pci_scan_bridge(bus, dev, max, pass); |
92c9be95 | 1003 | if (pass && dev->subordinate) |
c64b5eea KA |
1004 | pci_bus_size_bridges(dev->subordinate); |
1005 | } | |
42f49a6a | 1006 | } |
1da177e4 LT |
1007 | } |
1008 | ||
92c9be95 MT |
1009 | list_for_each (l, &slot->funcs) { |
1010 | func = list_entry(l, struct acpiphp_func, sibling); | |
1011 | acpiphp_bus_add(func); | |
1012 | } | |
1013 | ||
42f49a6a | 1014 | pci_bus_assign_resources(bus); |
8e5dce35 | 1015 | acpiphp_sanitize_bus(bus); |
fca6825a | 1016 | acpiphp_set_hpp_values(bus); |
9b1d19ee ST |
1017 | list_for_each_entry(func, &slot->funcs, sibling) |
1018 | acpiphp_configure_ioapics(func->handle); | |
8e5dce35 | 1019 | pci_enable_bridges(bus); |
42f49a6a RS |
1020 | pci_bus_add_devices(bus); |
1021 | ||
1da177e4 LT |
1022 | list_for_each (l, &slot->funcs) { |
1023 | func = list_entry(l, struct acpiphp_func, sibling); | |
9d911d79 AC |
1024 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, |
1025 | func->function)); | |
1026 | if (!dev) | |
551bcb75 MT |
1027 | continue; |
1028 | ||
9d911d79 AC |
1029 | if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE && |
1030 | dev->hdr_type != PCI_HEADER_TYPE_CARDBUS) { | |
1031 | pci_dev_put(dev); | |
551bcb75 | 1032 | continue; |
9d911d79 | 1033 | } |
551bcb75 MT |
1034 | |
1035 | status = find_p2p_bridge(func->handle, (u32)1, bus, NULL); | |
1036 | if (ACPI_FAILURE(status)) | |
1037 | warn("find_p2p_bridge failed (error code = 0x%x)\n", | |
1038 | status); | |
9d911d79 | 1039 | pci_dev_put(dev); |
1da177e4 LT |
1040 | } |
1041 | ||
1042 | slot->flags |= SLOT_ENABLED; | |
1043 | ||
1da177e4 LT |
1044 | err_exit: |
1045 | return retval; | |
1046 | } | |
1047 | ||
d5cdb672 ST |
1048 | static void disable_bridges(struct pci_bus *bus) |
1049 | { | |
1050 | struct pci_dev *dev; | |
1051 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1052 | if (dev->subordinate) { | |
1053 | disable_bridges(dev->subordinate); | |
1054 | pci_disable_device(dev); | |
1055 | } | |
1056 | } | |
1057 | } | |
1da177e4 LT |
1058 | |
1059 | /** | |
1060 | * disable_device - disable a slot | |
26e6c66e | 1061 | * @slot: ACPI PHP slot |
1da177e4 LT |
1062 | */ |
1063 | static int disable_device(struct acpiphp_slot *slot) | |
1064 | { | |
1da177e4 | 1065 | struct acpiphp_func *func; |
9d911d79 | 1066 | struct pci_dev *pdev; |
1da177e4 LT |
1067 | |
1068 | /* is this slot already disabled? */ | |
1069 | if (!(slot->flags & SLOT_ENABLED)) | |
1070 | goto err_exit; | |
1071 | ||
9d911d79 | 1072 | list_for_each_entry(func, &slot->funcs, sibling) { |
551bcb75 MT |
1073 | if (func->bridge) { |
1074 | /* cleanup p2p bridges under this P2P bridge */ | |
1075 | cleanup_p2p_bridge(func->bridge->handle, | |
1076 | (u32)1, NULL, NULL); | |
1077 | func->bridge = NULL; | |
1078 | } | |
1079 | ||
9d911d79 AC |
1080 | pdev = pci_get_slot(slot->bridge->pci_bus, |
1081 | PCI_DEVFN(slot->device, func->function)); | |
1082 | if (pdev) { | |
1083 | pci_stop_bus_device(pdev); | |
1084 | if (pdev->subordinate) { | |
1085 | disable_bridges(pdev->subordinate); | |
1086 | pci_disable_device(pdev); | |
d5cdb672 | 1087 | } |
9d911d79 AC |
1088 | pci_remove_bus_device(pdev); |
1089 | pci_dev_put(pdev); | |
d5cdb672 | 1090 | } |
600812ec ST |
1091 | } |
1092 | ||
9d911d79 | 1093 | list_for_each_entry(func, &slot->funcs, sibling) { |
600812ec | 1094 | acpiphp_unconfigure_ioapics(func->handle); |
92c9be95 | 1095 | acpiphp_bus_trim(func->handle); |
1da177e4 LT |
1096 | } |
1097 | ||
1098 | slot->flags &= (~SLOT_ENABLED); | |
1099 | ||
9d911d79 AC |
1100 | err_exit: |
1101 | return 0; | |
1da177e4 LT |
1102 | } |
1103 | ||
1104 | ||
1105 | /** | |
1106 | * get_slot_status - get ACPI slot status | |
26e6c66e | 1107 | * @slot: ACPI PHP slot |
1da177e4 | 1108 | * |
26e6c66e RD |
1109 | * If a slot has _STA for each function and if any one of them |
1110 | * returned non-zero status, return it. | |
1da177e4 | 1111 | * |
26e6c66e RD |
1112 | * If a slot doesn't have _STA and if any one of its functions' |
1113 | * configuration space is configured, return 0x0f as a _STA. | |
1da177e4 | 1114 | * |
26e6c66e | 1115 | * Otherwise return 0. |
1da177e4 LT |
1116 | */ |
1117 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
1118 | { | |
1119 | acpi_status status; | |
27663c58 | 1120 | unsigned long long sta = 0; |
1da177e4 LT |
1121 | u32 dvid; |
1122 | struct list_head *l; | |
1123 | struct acpiphp_func *func; | |
1124 | ||
1125 | list_for_each (l, &slot->funcs) { | |
1126 | func = list_entry(l, struct acpiphp_func, sibling); | |
1127 | ||
1128 | if (func->flags & FUNC_HAS_STA) { | |
1129 | status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); | |
1130 | if (ACPI_SUCCESS(status) && sta) | |
1131 | break; | |
1132 | } else { | |
1133 | pci_bus_read_config_dword(slot->bridge->pci_bus, | |
1134 | PCI_DEVFN(slot->device, | |
1135 | func->function), | |
1136 | PCI_VENDOR_ID, &dvid); | |
1137 | if (dvid != 0xffffffff) { | |
1138 | sta = ACPI_STA_ALL; | |
1139 | break; | |
1140 | } | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | return (unsigned int)sta; | |
1145 | } | |
1146 | ||
8d50e332 RS |
1147 | /** |
1148 | * acpiphp_eject_slot - physically eject the slot | |
26e6c66e | 1149 | * @slot: ACPI PHP slot |
8d50e332 | 1150 | */ |
bfceafc5 | 1151 | int acpiphp_eject_slot(struct acpiphp_slot *slot) |
8d50e332 RS |
1152 | { |
1153 | acpi_status status; | |
1154 | struct acpiphp_func *func; | |
1155 | struct list_head *l; | |
1156 | struct acpi_object_list arg_list; | |
1157 | union acpi_object arg; | |
1158 | ||
1159 | list_for_each (l, &slot->funcs) { | |
1160 | func = list_entry(l, struct acpiphp_func, sibling); | |
1161 | ||
1162 | /* We don't want to call _EJ0 on non-existing functions. */ | |
1163 | if ((func->flags & FUNC_HAS_EJ0)) { | |
1164 | /* _EJ0 method take one argument */ | |
1165 | arg_list.count = 1; | |
1166 | arg_list.pointer = &arg; | |
1167 | arg.type = ACPI_TYPE_INTEGER; | |
1168 | arg.integer.value = 1; | |
1169 | ||
1170 | status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); | |
1171 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 1172 | warn("%s: _EJ0 failed\n", __func__); |
8d50e332 RS |
1173 | return -1; |
1174 | } else | |
1175 | break; | |
1176 | } | |
1177 | } | |
1178 | return 0; | |
1179 | } | |
1180 | ||
1da177e4 LT |
1181 | /** |
1182 | * acpiphp_check_bridge - re-enumerate devices | |
26e6c66e | 1183 | * @bridge: where to begin re-enumeration |
1da177e4 LT |
1184 | * |
1185 | * Iterate over all slots under this bridge and make sure that if a | |
1186 | * card is present they are enabled, and if not they are disabled. | |
1187 | */ | |
1188 | static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) | |
1189 | { | |
1190 | struct acpiphp_slot *slot; | |
1191 | int retval = 0; | |
1192 | int enabled, disabled; | |
1193 | ||
1194 | enabled = disabled = 0; | |
1195 | ||
1196 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1197 | unsigned int status = get_slot_status(slot); | |
1198 | if (slot->flags & SLOT_ENABLED) { | |
1199 | if (status == ACPI_STA_ALL) | |
1200 | continue; | |
1201 | retval = acpiphp_disable_slot(slot); | |
1202 | if (retval) { | |
1203 | err("Error occurred in disabling\n"); | |
1204 | goto err_exit; | |
8d50e332 RS |
1205 | } else { |
1206 | acpiphp_eject_slot(slot); | |
1da177e4 LT |
1207 | } |
1208 | disabled++; | |
1209 | } else { | |
1210 | if (status != ACPI_STA_ALL) | |
1211 | continue; | |
1212 | retval = acpiphp_enable_slot(slot); | |
1213 | if (retval) { | |
1214 | err("Error occurred in enabling\n"); | |
1215 | goto err_exit; | |
1216 | } | |
1217 | enabled++; | |
1218 | } | |
1219 | } | |
1220 | ||
66bef8c0 | 1221 | dbg("%s: %d enabled, %d disabled\n", __func__, enabled, disabled); |
1da177e4 LT |
1222 | |
1223 | err_exit: | |
1224 | return retval; | |
1225 | } | |
1226 | ||
fca6825a | 1227 | static void acpiphp_set_hpp_values(struct pci_bus *bus) |
8e7561cf | 1228 | { |
8e7561cf RS |
1229 | struct pci_dev *dev; |
1230 | ||
e81995bb BH |
1231 | list_for_each_entry(dev, &bus->devices, bus_list) |
1232 | pci_configure_slot(dev); | |
8e7561cf RS |
1233 | } |
1234 | ||
1235 | /* | |
1236 | * Remove devices for which we could not assign resources, call | |
1237 | * arch specific code to fix-up the bus | |
1238 | */ | |
1239 | static void acpiphp_sanitize_bus(struct pci_bus *bus) | |
1240 | { | |
1241 | struct pci_dev *dev; | |
1242 | int i; | |
1243 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; | |
1244 | ||
1245 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1246 | for (i=0; i<PCI_BRIDGE_RESOURCES; i++) { | |
1247 | struct resource *res = &dev->resource[i]; | |
1248 | if ((res->flags & type_mask) && !res->start && | |
1249 | res->end) { | |
1250 | /* Could not assign a required resources | |
1251 | * for this device, remove it */ | |
1252 | pci_remove_bus_device(dev); | |
1253 | break; | |
1254 | } | |
1255 | } | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | /* Program resources in newly inserted bridge */ | |
1260 | static int acpiphp_configure_bridge (acpi_handle handle) | |
1261 | { | |
7f538669 AC |
1262 | struct pci_bus *bus; |
1263 | ||
1264 | if (acpi_is_root_bridge(handle)) { | |
1265 | struct acpi_pci_root *root = acpi_pci_find_root(handle); | |
1266 | bus = root->bus; | |
1267 | } else { | |
1268 | struct pci_dev *pdev = acpi_get_pci_dev(handle); | |
1269 | bus = pdev->subordinate; | |
1270 | pci_dev_put(pdev); | |
1271 | } | |
8e7561cf RS |
1272 | |
1273 | pci_bus_size_bridges(bus); | |
1274 | pci_bus_assign_resources(bus); | |
1275 | acpiphp_sanitize_bus(bus); | |
fca6825a | 1276 | acpiphp_set_hpp_values(bus); |
8e7561cf | 1277 | pci_enable_bridges(bus); |
a0d399a8 | 1278 | acpiphp_configure_ioapics(handle); |
8e7561cf RS |
1279 | return 0; |
1280 | } | |
1281 | ||
1282 | static void handle_bridge_insertion(acpi_handle handle, u32 type) | |
1283 | { | |
1284 | struct acpi_device *device, *pdevice; | |
1285 | acpi_handle phandle; | |
1286 | ||
1287 | if ((type != ACPI_NOTIFY_BUS_CHECK) && | |
1288 | (type != ACPI_NOTIFY_DEVICE_CHECK)) { | |
1289 | err("unexpected notification type %d\n", type); | |
1290 | return; | |
1291 | } | |
1292 | ||
1293 | acpi_get_parent(handle, &phandle); | |
1294 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1295 | dbg("no parent device, assuming NULL\n"); | |
1296 | pdevice = NULL; | |
1297 | } | |
1298 | if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) { | |
1299 | err("cannot add bridge to acpi list\n"); | |
1300 | return; | |
1301 | } | |
1302 | if (!acpiphp_configure_bridge(handle) && | |
1303 | !acpi_bus_start(device)) | |
1304 | add_bridge(handle); | |
1305 | else | |
1306 | err("cannot configure and start bridge\n"); | |
1307 | ||
1308 | } | |
1309 | ||
1da177e4 LT |
1310 | /* |
1311 | * ACPI event handlers | |
1312 | */ | |
1313 | ||
0bbd6424 GH |
1314 | static acpi_status |
1315 | count_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1316 | { | |
1317 | int *count = (int *)context; | |
1318 | struct acpiphp_bridge *bridge; | |
1319 | ||
1320 | bridge = acpiphp_handle_to_bridge(handle); | |
1321 | if (bridge) | |
1322 | (*count)++; | |
1323 | return AE_OK ; | |
1324 | } | |
1325 | ||
1326 | static acpi_status | |
1327 | check_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1328 | { | |
1329 | struct acpiphp_bridge *bridge; | |
1330 | char objname[64]; | |
1331 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1332 | .pointer = objname }; | |
1333 | ||
1334 | bridge = acpiphp_handle_to_bridge(handle); | |
1335 | if (bridge) { | |
1336 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1337 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1338 | __func__, objname); |
0bbd6424 GH |
1339 | acpiphp_check_bridge(bridge); |
1340 | } | |
1341 | return AE_OK ; | |
1342 | } | |
1343 | ||
1da177e4 LT |
1344 | /** |
1345 | * handle_hotplug_event_bridge - handle ACPI event on bridges | |
1da177e4 LT |
1346 | * @handle: Notify()'ed acpi_handle |
1347 | * @type: Notify code | |
1348 | * @context: pointer to acpiphp_bridge structure | |
1349 | * | |
26e6c66e | 1350 | * Handles ACPI event notification on {host,p2p} bridges. |
1da177e4 LT |
1351 | */ |
1352 | static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context) | |
1353 | { | |
1354 | struct acpiphp_bridge *bridge; | |
1355 | char objname[64]; | |
1356 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1357 | .pointer = objname }; | |
8e7561cf | 1358 | struct acpi_device *device; |
0bbd6424 | 1359 | int num_sub_bridges = 0; |
1da177e4 | 1360 | |
8e7561cf RS |
1361 | if (acpi_bus_get_device(handle, &device)) { |
1362 | /* This bridge must have just been physically inserted */ | |
1363 | handle_bridge_insertion(handle, type); | |
1364 | return; | |
1365 | } | |
1366 | ||
1367 | bridge = acpiphp_handle_to_bridge(handle); | |
0bbd6424 GH |
1368 | if (type == ACPI_NOTIFY_BUS_CHECK) { |
1369 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, ACPI_UINT32_MAX, | |
1370 | count_sub_bridges, &num_sub_bridges, NULL); | |
1371 | } | |
1372 | ||
1373 | if (!bridge && !num_sub_bridges) { | |
8e7561cf RS |
1374 | err("cannot get bridge info\n"); |
1375 | return; | |
1376 | } | |
1da177e4 LT |
1377 | |
1378 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1379 | ||
1380 | switch (type) { | |
1381 | case ACPI_NOTIFY_BUS_CHECK: | |
1382 | /* bus re-enumerate */ | |
66bef8c0 | 1383 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
0bbd6424 GH |
1384 | if (bridge) { |
1385 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1386 | __func__, objname); |
0bbd6424 GH |
1387 | acpiphp_check_bridge(bridge); |
1388 | } | |
1389 | if (num_sub_bridges) | |
1390 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
1391 | ACPI_UINT32_MAX, check_sub_bridges, NULL, NULL); | |
1da177e4 LT |
1392 | break; |
1393 | ||
1394 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1395 | /* device check */ | |
66bef8c0 | 1396 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1397 | acpiphp_check_bridge(bridge); |
1398 | break; | |
1399 | ||
1400 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1401 | /* wake event */ | |
66bef8c0 | 1402 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1403 | break; |
1404 | ||
1405 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1406 | /* request device eject */ | |
66bef8c0 | 1407 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
551bcb75 MT |
1408 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
1409 | (bridge->flags & BRIDGE_HAS_EJ0)) { | |
1410 | struct acpiphp_slot *slot; | |
1411 | slot = bridge->func->slot; | |
1412 | if (!acpiphp_disable_slot(slot)) | |
1413 | acpiphp_eject_slot(slot); | |
1414 | } | |
1da177e4 LT |
1415 | break; |
1416 | ||
1417 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1418 | printk(KERN_ERR "Device %s cannot be configured due" | |
1419 | " to a frequency mismatch\n", objname); | |
1420 | break; | |
1421 | ||
1422 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1423 | printk(KERN_ERR "Device %s cannot be configured due" | |
1424 | " to a bus mode mismatch\n", objname); | |
1425 | break; | |
1426 | ||
1427 | case ACPI_NOTIFY_POWER_FAULT: | |
1428 | printk(KERN_ERR "Device %s has suffered a power fault\n", | |
1429 | objname); | |
1430 | break; | |
1431 | ||
1432 | default: | |
1433 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1434 | break; | |
1435 | } | |
1436 | } | |
1437 | ||
1da177e4 LT |
1438 | /** |
1439 | * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) | |
1da177e4 LT |
1440 | * @handle: Notify()'ed acpi_handle |
1441 | * @type: Notify code | |
1442 | * @context: pointer to acpiphp_func structure | |
1443 | * | |
26e6c66e | 1444 | * Handles ACPI event notification on slots. |
1da177e4 | 1445 | */ |
2b85e130 | 1446 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) |
1da177e4 LT |
1447 | { |
1448 | struct acpiphp_func *func; | |
1449 | char objname[64]; | |
1450 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1451 | .pointer = objname }; | |
1452 | ||
1453 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1454 | ||
1455 | func = (struct acpiphp_func *)context; | |
1456 | ||
1457 | switch (type) { | |
1458 | case ACPI_NOTIFY_BUS_CHECK: | |
1459 | /* bus re-enumerate */ | |
66bef8c0 | 1460 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
1da177e4 LT |
1461 | acpiphp_enable_slot(func->slot); |
1462 | break; | |
1463 | ||
1464 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1465 | /* device check : re-enumerate from parent bus */ | |
66bef8c0 | 1466 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1467 | acpiphp_check_bridge(func->slot->bridge); |
1468 | break; | |
1469 | ||
1470 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1471 | /* wake event */ | |
66bef8c0 | 1472 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1473 | break; |
1474 | ||
1475 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1476 | /* request device eject */ | |
66bef8c0 | 1477 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
8d50e332 RS |
1478 | if (!(acpiphp_disable_slot(func->slot))) |
1479 | acpiphp_eject_slot(func->slot); | |
1da177e4 LT |
1480 | break; |
1481 | ||
1482 | default: | |
1483 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1484 | break; | |
1485 | } | |
1486 | } | |
1487 | ||
8e7561cf RS |
1488 | |
1489 | static acpi_status | |
1490 | find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1491 | { | |
1492 | int *count = (int *)context; | |
1493 | ||
27558203 | 1494 | if (acpi_is_root_bridge(handle)) { |
8e7561cf RS |
1495 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1496 | handle_hotplug_event_bridge, NULL); | |
1497 | (*count)++; | |
1498 | } | |
1499 | return AE_OK ; | |
1500 | } | |
1da177e4 LT |
1501 | |
1502 | static struct acpi_pci_driver acpi_pci_hp_driver = { | |
1503 | .add = add_bridge, | |
1504 | .remove = remove_bridge, | |
1505 | }; | |
1506 | ||
1507 | /** | |
1508 | * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures | |
1da177e4 LT |
1509 | */ |
1510 | int __init acpiphp_glue_init(void) | |
1511 | { | |
8e7561cf | 1512 | int num = 0; |
1da177e4 | 1513 | |
8e7561cf RS |
1514 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
1515 | ACPI_UINT32_MAX, find_root_bridges, &num, NULL); | |
1da177e4 LT |
1516 | |
1517 | if (num <= 0) | |
1518 | return -1; | |
8e7561cf RS |
1519 | else |
1520 | acpi_pci_register_driver(&acpi_pci_hp_driver); | |
1da177e4 LT |
1521 | |
1522 | return 0; | |
1523 | } | |
1524 | ||
1525 | ||
1526 | /** | |
1527 | * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures | |
1528 | * | |
26e6c66e | 1529 | * This function frees all data allocated in acpiphp_glue_init(). |
1da177e4 | 1530 | */ |
031f30d2 | 1531 | void acpiphp_glue_exit(void) |
1da177e4 | 1532 | { |
1da177e4 LT |
1533 | acpi_pci_unregister_driver(&acpi_pci_hp_driver); |
1534 | } | |
1535 | ||
1536 | ||
1537 | /** | |
1538 | * acpiphp_get_num_slots - count number of slots in a system | |
1539 | */ | |
1540 | int __init acpiphp_get_num_slots(void) | |
1541 | { | |
1da177e4 | 1542 | struct acpiphp_bridge *bridge; |
467c442f | 1543 | int num_slots = 0; |
1da177e4 | 1544 | |
467c442f | 1545 | list_for_each_entry (bridge, &bridge_list, list) { |
42f49a6a RS |
1546 | dbg("Bus %04x:%02x has %d slot%s\n", |
1547 | pci_domain_nr(bridge->pci_bus), | |
1548 | bridge->pci_bus->number, bridge->nr_slots, | |
1549 | bridge->nr_slots == 1 ? "" : "s"); | |
1da177e4 LT |
1550 | num_slots += bridge->nr_slots; |
1551 | } | |
1552 | ||
42f49a6a | 1553 | dbg("Total %d slots\n", num_slots); |
1da177e4 LT |
1554 | return num_slots; |
1555 | } | |
1556 | ||
1557 | ||
1558 | #if 0 | |
1559 | /** | |
1560 | * acpiphp_for_each_slot - call function for each slot | |
1561 | * @fn: callback function | |
1562 | * @data: context to be passed to callback function | |
1da177e4 LT |
1563 | */ |
1564 | static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) | |
1565 | { | |
1566 | struct list_head *node; | |
1567 | struct acpiphp_bridge *bridge; | |
1568 | struct acpiphp_slot *slot; | |
1569 | int retval = 0; | |
1570 | ||
1571 | list_for_each (node, &bridge_list) { | |
1572 | bridge = (struct acpiphp_bridge *)node; | |
1573 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1574 | retval = fn(slot, data); | |
1575 | if (!retval) | |
1576 | goto err_exit; | |
1577 | } | |
1578 | } | |
1579 | ||
1580 | err_exit: | |
1581 | return retval; | |
1582 | } | |
1583 | #endif | |
1584 | ||
1da177e4 LT |
1585 | |
1586 | /** | |
1587 | * acpiphp_enable_slot - power on slot | |
26e6c66e | 1588 | * @slot: ACPI PHP slot |
1da177e4 LT |
1589 | */ |
1590 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
1591 | { | |
1592 | int retval; | |
1593 | ||
6aa4cdd0 | 1594 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1595 | |
1596 | /* wake up all functions */ | |
1597 | retval = power_on_slot(slot); | |
1598 | if (retval) | |
1599 | goto err_exit; | |
1600 | ||
cde0e5d7 | 1601 | if (get_slot_status(slot) == ACPI_STA_ALL) { |
1da177e4 LT |
1602 | /* configure all functions */ |
1603 | retval = enable_device(slot); | |
cde0e5d7 MT |
1604 | if (retval) |
1605 | power_off_slot(slot); | |
1606 | } else { | |
66bef8c0 | 1607 | dbg("%s: Slot status is not ACPI_STA_ALL\n", __func__); |
cde0e5d7 MT |
1608 | power_off_slot(slot); |
1609 | } | |
1da177e4 LT |
1610 | |
1611 | err_exit: | |
6aa4cdd0 | 1612 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1613 | return retval; |
1614 | } | |
1615 | ||
1da177e4 LT |
1616 | /** |
1617 | * acpiphp_disable_slot - power off slot | |
26e6c66e | 1618 | * @slot: ACPI PHP slot |
1da177e4 LT |
1619 | */ |
1620 | int acpiphp_disable_slot(struct acpiphp_slot *slot) | |
1621 | { | |
1622 | int retval = 0; | |
1623 | ||
6aa4cdd0 | 1624 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1625 | |
1626 | /* unconfigure all functions */ | |
1627 | retval = disable_device(slot); | |
1628 | if (retval) | |
1629 | goto err_exit; | |
1630 | ||
1631 | /* power off all functions */ | |
1632 | retval = power_off_slot(slot); | |
1633 | if (retval) | |
1634 | goto err_exit; | |
1635 | ||
1da177e4 | 1636 | err_exit: |
6aa4cdd0 | 1637 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1638 | return retval; |
1639 | } | |
1640 | ||
1641 | ||
1642 | /* | |
1643 | * slot enabled: 1 | |
1644 | * slot disabled: 0 | |
1645 | */ | |
1646 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
1647 | { | |
8d50e332 | 1648 | return (slot->flags & SLOT_POWEREDON); |
1da177e4 LT |
1649 | } |
1650 | ||
1651 | ||
1652 | /* | |
35ae61a0 MT |
1653 | * latch open: 1 |
1654 | * latch closed: 0 | |
1da177e4 LT |
1655 | */ |
1656 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1657 | { | |
1658 | unsigned int sta; | |
1659 | ||
1660 | sta = get_slot_status(slot); | |
1661 | ||
35ae61a0 | 1662 | return (sta & ACPI_STA_SHOW_IN_UI) ? 0 : 1; |
1da177e4 LT |
1663 | } |
1664 | ||
1665 | ||
1666 | /* | |
1667 | * adapter presence : 1 | |
1668 | * absence : 0 | |
1669 | */ | |
1670 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1671 | { | |
1672 | unsigned int sta; | |
1673 | ||
1674 | sta = get_slot_status(slot); | |
1675 | ||
1676 | return (sta == 0) ? 0 : 1; | |
1677 | } |