blob: 2a83e6bdab6a17ffd478e051da7d15d4cd2327a5 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Rajesh Shah42f49a62005-04-28 00:25:53 -07007 * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
8 * Copyright (C) 2003-2005 Hewlett Packard
Rajesh Shah8e7561c2005-04-28 00:25:56 -07009 * Copyright (C) 2005 Rajesh Shah (rajesh.shah@intel.com)
10 * Copyright (C) 2005 Intel Corporation
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 *
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 *
29 * Send feedback to <t-kochi@bq.jp.nec.com>
30 *
31 */
32
Rajesh Shah42f49a62005-04-28 00:25:53 -070033/*
34 * Lifetime rules for pci_dev:
35 * - The one in acpiphp_func has its refcount elevated by pci_get_slot()
36 * when the driver is loaded or when an insertion event occurs. It loses
37 * a refcount when its ejected or the driver unloads.
38 * - The one in acpiphp_bridge has its refcount elevated by pci_get_slot()
39 * when the bridge is scanned and it loses a refcount when the bridge
40 * is removed.
41 */
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/init.h>
44#include <linux/module.h>
45
46#include <linux/kernel.h>
47#include <linux/pci.h>
48#include <linux/smp_lock.h>
Ingo Molnar6aa4cdd2006-01-13 16:02:15 +010049#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51#include "../pci.h"
52#include "pci_hotplug.h"
53#include "acpiphp.h"
54
55static LIST_HEAD(bridge_list);
56
57#define MY_NAME "acpiphp_glue"
58
59static void handle_hotplug_event_bridge (acpi_handle, u32, void *);
Kristen Accardi8e5dce32005-10-18 17:21:40 -070060static void acpiphp_sanitize_bus(struct pci_bus *bus);
61static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus);
62
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64/*
65 * initialization & terminatation routines
66 */
67
68/**
69 * is_ejectable - determine if a slot is ejectable
70 * @handle: handle to acpi namespace
71 *
72 * Ejectable slot should satisfy at least these conditions:
73 *
74 * 1. has _ADR method
75 * 2. has _EJ0 method
76 *
77 * optionally
78 *
79 * 1. has _STA method
80 * 2. has _PS0 method
81 * 3. has _PS3 method
82 * 4. ..
83 *
84 */
85static int is_ejectable(acpi_handle handle)
86{
87 acpi_status status;
88 acpi_handle tmp;
89
90 status = acpi_get_handle(handle, "_ADR", &tmp);
91 if (ACPI_FAILURE(status)) {
92 return 0;
93 }
94
95 status = acpi_get_handle(handle, "_EJ0", &tmp);
96 if (ACPI_FAILURE(status)) {
97 return 0;
98 }
99
100 return 1;
101}
102
103
104/* callback routine to check the existence of ejectable slots */
105static acpi_status
106is_ejectable_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
107{
108 int *count = (int *)context;
109
110 if (is_ejectable(handle)) {
111 (*count)++;
112 /* only one ejectable slot is enough */
113 return AE_CTRL_TERMINATE;
114 } else {
115 return AE_OK;
116 }
117}
118
119
120/* callback routine to register each ACPI PCI slot object */
121static acpi_status
122register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
123{
124 struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context;
125 struct acpiphp_slot *slot;
126 struct acpiphp_func *newfunc;
Kristen Accardi20416ea2006-02-23 17:56:03 -0800127 struct dependent_device *dd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 acpi_handle tmp;
129 acpi_status status = AE_OK;
130 unsigned long adr, sun;
MUNEDA Takahiroe27da382006-02-23 17:56:08 -0800131 int device, function, retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
133 status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
134
135 if (ACPI_FAILURE(status))
136 return AE_OK;
137
138 status = acpi_get_handle(handle, "_EJ0", &tmp);
139
Kristen Accardi20416ea2006-02-23 17:56:03 -0800140 if (ACPI_FAILURE(status) && !(is_dependent_device(handle)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 return AE_OK;
142
143 device = (adr >> 16) & 0xffff;
144 function = adr & 0xffff;
145
Eric Sesterhennf5afe802006-02-28 15:34:49 +0100146 newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 if (!newfunc)
148 return AE_NO_MEMORY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
150 INIT_LIST_HEAD(&newfunc->sibling);
151 newfunc->handle = handle;
152 newfunc->function = function;
Kristen Accardi20416ea2006-02-23 17:56:03 -0800153 if (ACPI_SUCCESS(status))
154 newfunc->flags = FUNC_HAS_EJ0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156 if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp)))
157 newfunc->flags |= FUNC_HAS_STA;
158
159 if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp)))
160 newfunc->flags |= FUNC_HAS_PS0;
161
162 if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp)))
163 newfunc->flags |= FUNC_HAS_PS3;
164
Kristen Accardi20416ea2006-02-23 17:56:03 -0800165 if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp))) {
166 newfunc->flags |= FUNC_HAS_DCK;
167 /* add to devices dependent on dock station,
168 * because this may actually be the dock bridge
169 */
170 dd = alloc_dependent_device(handle);
171 if (!dd)
172 err("Can't allocate memory for "
173 "new dependent device!\n");
174 else
175 add_dependent_device(dd);
176 }
177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun);
179 if (ACPI_FAILURE(status))
180 sun = -1;
181
182 /* search for objects that share the same slot */
183 for (slot = bridge->slots; slot; slot = slot->next)
184 if (slot->device == device) {
185 if (slot->sun != sun)
186 warn("sibling found, but _SUN doesn't match!\n");
187 break;
188 }
189
190 if (!slot) {
Eric Sesterhennf5afe802006-02-28 15:34:49 +0100191 slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 if (!slot) {
193 kfree(newfunc);
194 return AE_NO_MEMORY;
195 }
196
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 slot->bridge = bridge;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 slot->device = device;
199 slot->sun = sun;
200 INIT_LIST_HEAD(&slot->funcs);
Ingo Molnar6aa4cdd2006-01-13 16:02:15 +0100201 mutex_init(&slot->crit_sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203 slot->next = bridge->slots;
204 bridge->slots = slot;
205
206 bridge->nr_slots++;
207
Rajesh Shah42f49a62005-04-28 00:25:53 -0700208 dbg("found ACPI PCI Hotplug slot %d at PCI %04x:%02x:%02x\n",
209 slot->sun, pci_domain_nr(bridge->pci_bus),
210 bridge->pci_bus->number, slot->device);
MUNEDA Takahiroe27da382006-02-23 17:56:08 -0800211 retval = acpiphp_register_hotplug_slot(slot);
212 if (retval) {
213 warn("acpiphp_register_hotplug_slot failed(err code = 0x%x)\n", retval);
214 goto err_exit;
215 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 }
217
218 newfunc->slot = slot;
219 list_add_tail(&newfunc->sibling, &slot->funcs);
220
221 /* associate corresponding pci_dev */
Rajesh Shah42f49a62005-04-28 00:25:53 -0700222 newfunc->pci_dev = pci_get_slot(bridge->pci_bus,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 PCI_DEVFN(device, function));
224 if (newfunc->pci_dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON);
226 }
227
Kristen Accardi20416ea2006-02-23 17:56:03 -0800228 /* if this is a device dependent on a dock station,
229 * associate the acpiphp_func to the dependent_device
230 * struct.
231 */
232 if ((dd = get_dependent_device(handle))) {
233 newfunc->flags |= FUNC_IS_DD;
234 /*
235 * we don't want any devices which is dependent
236 * on the dock to have it's _EJ0 method executed.
237 * because we need to run _DCK first.
238 */
239 newfunc->flags &= ~FUNC_HAS_EJ0;
240 dd->func = newfunc;
241 add_pci_dependent_device(dd);
242 }
243
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 /* install notify handler */
Kristen Accardi20416ea2006-02-23 17:56:03 -0800245 if (!(newfunc->flags & FUNC_HAS_DCK)) {
246 status = acpi_install_notify_handler(handle,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 ACPI_SYSTEM_NOTIFY,
248 handle_hotplug_event_func,
249 newfunc);
250
Kristen Accardi20416ea2006-02-23 17:56:03 -0800251 if (ACPI_FAILURE(status))
252 err("failed to register interrupt notify handler\n");
253 } else
254 status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Kristen Accardi20416ea2006-02-23 17:56:03 -0800256 return status;
MUNEDA Takahiroe27da382006-02-23 17:56:08 -0800257
258 err_exit:
259 bridge->nr_slots--;
260 bridge->slots = slot->next;
261 kfree(slot);
262 kfree(newfunc);
263
264 return AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265}
266
267
268/* see if it's worth looking at this bridge */
269static int detect_ejectable_slots(acpi_handle *bridge_handle)
270{
271 acpi_status status;
272 int count;
273
274 count = 0;
275
276 /* only check slots defined directly below bridge object */
277 status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1,
278 is_ejectable_slot, (void *)&count, NULL);
279
280 return count;
281}
282
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284/* decode ACPI 2.0 _HPP hot plug parameters */
285static void decode_hpp(struct acpiphp_bridge *bridge)
286{
287 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Kristen Accardi783c49f2006-03-03 10:16:05 -0800289 status = acpi_get_hp_params_from_firmware(bridge->pci_dev, &bridge->hpp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 if (ACPI_FAILURE(status)) {
Kristen Accardi783c49f2006-03-03 10:16:05 -0800291 /* use default numbers */
292 bridge->hpp.cache_line_size = 0x10;
293 bridge->hpp.latency_timer = 0x40;
294 bridge->hpp.enable_serr = 0;
295 bridge->hpp.enable_perr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297}
298
299
Kristen Accardi783c49f2006-03-03 10:16:05 -0800300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301/* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */
302static void init_bridge_misc(struct acpiphp_bridge *bridge)
303{
304 acpi_status status;
305
306 /* decode ACPI 2.0 _HPP (hot plug parameters) */
307 decode_hpp(bridge);
308
MUNEDA Takahiroe27da382006-02-23 17:56:08 -0800309 /* must be added to the list prior to calling register_slot */
310 list_add(&bridge->list, &bridge_list);
311
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 /* register all slot objects under this bridge */
313 status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1,
314 register_slot, bridge, NULL);
MUNEDA Takahiroe27da382006-02-23 17:56:08 -0800315 if (ACPI_FAILURE(status)) {
316 list_del(&bridge->list);
317 return;
318 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
320 /* install notify handler */
Rajesh Shah8e7561c2005-04-28 00:25:56 -0700321 if (bridge->type != BRIDGE_TYPE_HOST) {
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +0900322 if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) {
323 status = acpi_remove_notify_handler(bridge->func->handle,
324 ACPI_SYSTEM_NOTIFY,
325 handle_hotplug_event_func);
326 if (ACPI_FAILURE(status))
327 err("failed to remove notify handler\n");
328 }
Rajesh Shah8e7561c2005-04-28 00:25:56 -0700329 status = acpi_install_notify_handler(bridge->handle,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 ACPI_SYSTEM_NOTIFY,
331 handle_hotplug_event_bridge,
332 bridge);
333
Rajesh Shah8e7561c2005-04-28 00:25:56 -0700334 if (ACPI_FAILURE(status)) {
335 err("failed to register interrupt notify handler\n");
336 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338}
339
340
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +0900341/* find acpiphp_func from acpiphp_bridge */
342static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle)
343{
344 struct list_head *node, *l;
345 struct acpiphp_bridge *bridge;
346 struct acpiphp_slot *slot;
347 struct acpiphp_func *func;
348
349 list_for_each(node, &bridge_list) {
350 bridge = list_entry(node, struct acpiphp_bridge, list);
351 for (slot = bridge->slots; slot; slot = slot->next) {
352 list_for_each(l, &slot->funcs) {
353 func = list_entry(l, struct acpiphp_func,
354 sibling);
355 if (func->handle == handle)
356 return func;
357 }
358 }
359 }
360
361 return NULL;
362}
363
364
365static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge)
366{
367 acpi_handle dummy_handle;
368
369 if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
370 "_STA", &dummy_handle)))
371 bridge->flags |= BRIDGE_HAS_STA;
372
373 if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
374 "_EJ0", &dummy_handle)))
375 bridge->flags |= BRIDGE_HAS_EJ0;
376
377 if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
378 "_PS0", &dummy_handle)))
379 bridge->flags |= BRIDGE_HAS_PS0;
380
381 if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
382 "_PS3", &dummy_handle)))
383 bridge->flags |= BRIDGE_HAS_PS3;
384
385 /* is this ejectable p2p bridge? */
386 if (bridge->flags & BRIDGE_HAS_EJ0) {
387 struct acpiphp_func *func;
388
389 dbg("found ejectable p2p bridge\n");
390
391 /* make link between PCI bridge and PCI function */
392 func = acpiphp_bridge_handle_to_function(bridge->handle);
393 if (!func)
394 return;
395 bridge->func = func;
396 func->bridge = bridge;
397 }
398}
399
400
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401/* allocate and initialize host bridge data structure */
Rajesh Shah42f49a62005-04-28 00:25:53 -0700402static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 struct acpiphp_bridge *bridge;
405
Eric Sesterhennf5afe802006-02-28 15:34:49 +0100406 bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 if (bridge == NULL)
408 return;
409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 bridge->type = BRIDGE_TYPE_HOST;
411 bridge->handle = handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
Rajesh Shah42f49a62005-04-28 00:25:53 -0700413 bridge->pci_bus = pci_bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
415 spin_lock_init(&bridge->res_lock);
416
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 init_bridge_misc(bridge);
418}
419
420
421/* allocate and initialize PCI-to-PCI bridge data structure */
Rajesh Shah42f49a62005-04-28 00:25:53 -0700422static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423{
424 struct acpiphp_bridge *bridge;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Eric Sesterhennf5afe802006-02-28 15:34:49 +0100426 bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 if (bridge == NULL) {
428 err("out of memory\n");
429 return;
430 }
431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 bridge->type = BRIDGE_TYPE_P2P;
433 bridge->handle = handle;
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +0900434 config_p2p_bridge_flags(bridge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
Rajesh Shah42f49a62005-04-28 00:25:53 -0700436 bridge->pci_dev = pci_dev_get(pci_dev);
437 bridge->pci_bus = pci_dev->subordinate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 if (!bridge->pci_bus) {
439 err("This is not a PCI-to-PCI bridge!\n");
Rajesh Shah42f49a62005-04-28 00:25:53 -0700440 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 }
442
443 spin_lock_init(&bridge->res_lock);
444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 init_bridge_misc(bridge);
Rajesh Shah42f49a62005-04-28 00:25:53 -0700446 return;
447 err:
448 pci_dev_put(pci_dev);
449 kfree(bridge);
450 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451}
452
453
454/* callback routine to find P2P bridges */
455static acpi_status
456find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
457{
458 acpi_status status;
459 acpi_handle dummy_handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 unsigned long tmp;
Rajesh Shah42f49a62005-04-28 00:25:53 -0700461 int device, function;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 struct pci_dev *dev;
Rajesh Shah42f49a62005-04-28 00:25:53 -0700463 struct pci_bus *pci_bus = context;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464
465 status = acpi_get_handle(handle, "_ADR", &dummy_handle);
466 if (ACPI_FAILURE(status))
467 return AE_OK; /* continue */
468
469 status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp);
470 if (ACPI_FAILURE(status)) {
471 dbg("%s: _ADR evaluation failure\n", __FUNCTION__);
472 return AE_OK;
473 }
474
475 device = (tmp >> 16) & 0xffff;
476 function = tmp & 0xffff;
477
Rajesh Shah42f49a62005-04-28 00:25:53 -0700478 dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Rajesh Shah42f49a62005-04-28 00:25:53 -0700480 if (!dev || !dev->subordinate)
481 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
483 /* check if this bridge has ejectable slots */
Kristen Accardi20416ea2006-02-23 17:56:03 -0800484 if ((detect_ejectable_slots(handle) > 0) ||
485 (detect_dependent_devices(handle) > 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev));
Rajesh Shah42f49a62005-04-28 00:25:53 -0700487 add_p2p_bridge(handle, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 }
489
Kenji Kaneshige7c8f25d2006-02-27 22:15:49 +0900490 /* search P2P bridges under this p2p bridge */
491 status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
492 find_p2p_bridge, dev->subordinate, NULL);
493 if (ACPI_FAILURE(status))
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +0900494 warn("find_p2p_bridge failed (error code = 0x%x)\n", status);
Kenji Kaneshige7c8f25d2006-02-27 22:15:49 +0900495
Rajesh Shah42f49a62005-04-28 00:25:53 -0700496 out:
497 pci_dev_put(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 return AE_OK;
499}
500
501
502/* find hot-pluggable slots, and then find P2P bridge */
503static int add_bridge(acpi_handle handle)
504{
505 acpi_status status;
506 unsigned long tmp;
507 int seg, bus;
508 acpi_handle dummy_handle;
Rajesh Shah42f49a62005-04-28 00:25:53 -0700509 struct pci_bus *pci_bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
511 /* if the bridge doesn't have _STA, we assume it is always there */
512 status = acpi_get_handle(handle, "_STA", &dummy_handle);
513 if (ACPI_SUCCESS(status)) {
514 status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp);
515 if (ACPI_FAILURE(status)) {
516 dbg("%s: _STA evaluation failure\n", __FUNCTION__);
517 return 0;
518 }
519 if ((tmp & ACPI_STA_FUNCTIONING) == 0)
520 /* don't register this object */
521 return 0;
522 }
523
524 /* get PCI segment number */
525 status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp);
526
527 seg = ACPI_SUCCESS(status) ? tmp : 0;
528
529 /* get PCI bus number */
530 status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp);
531
532 if (ACPI_SUCCESS(status)) {
533 bus = tmp;
534 } else {
535 warn("can't get bus number, assuming 0\n");
536 bus = 0;
537 }
538
Rajesh Shah42f49a62005-04-28 00:25:53 -0700539 pci_bus = pci_find_bus(seg, bus);
540 if (!pci_bus) {
541 err("Can't find bus %04x:%02x\n", seg, bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 return 0;
543 }
544
Rajesh Shah42f49a62005-04-28 00:25:53 -0700545 /* check if this bridge has ejectable slots */
546 if (detect_ejectable_slots(handle) > 0) {
547 dbg("found PCI host-bus bridge with hot-pluggable slots\n");
548 add_host_bridge(handle, pci_bus);
Rajesh Shah42f49a62005-04-28 00:25:53 -0700549 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
551 /* search P2P bridges under this host bridge */
552 status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
Rajesh Shah42f49a62005-04-28 00:25:53 -0700553 find_p2p_bridge, pci_bus, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554
555 if (ACPI_FAILURE(status))
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +0900556 warn("find_p2p_bridge failed (error code = 0x%x)\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
558 return 0;
559}
560
Rajesh Shah42f49a62005-04-28 00:25:53 -0700561static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle)
562{
563 struct list_head *head;
564 list_for_each(head, &bridge_list) {
565 struct acpiphp_bridge *bridge = list_entry(head,
566 struct acpiphp_bridge, list);
567 if (bridge->handle == handle)
568 return bridge;
569 }
570
571 return NULL;
572}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
Rajesh Shah364d5092005-04-28 00:25:54 -0700574static void cleanup_bridge(struct acpiphp_bridge *bridge)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575{
Rajesh Shah42f49a62005-04-28 00:25:53 -0700576 struct list_head *list, *tmp;
Rajesh Shah42f49a62005-04-28 00:25:53 -0700577 struct acpiphp_slot *slot;
578 acpi_status status;
Rajesh Shah364d5092005-04-28 00:25:54 -0700579 acpi_handle handle = bridge->handle;
Rajesh Shah42f49a62005-04-28 00:25:53 -0700580
581 status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
582 handle_hotplug_event_bridge);
583 if (ACPI_FAILURE(status))
584 err("failed to remove notify handler\n");
585
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +0900586 if ((bridge->type != BRIDGE_TYPE_HOST) &&
587 ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) {
588 status = acpi_install_notify_handler(bridge->func->handle,
589 ACPI_SYSTEM_NOTIFY,
590 handle_hotplug_event_func,
591 bridge->func);
592 if (ACPI_FAILURE(status))
593 err("failed to install interrupt notify handler\n");
594 }
595
Rajesh Shah42f49a62005-04-28 00:25:53 -0700596 slot = bridge->slots;
597 while (slot) {
598 struct acpiphp_slot *next = slot->next;
599 list_for_each_safe (list, tmp, &slot->funcs) {
600 struct acpiphp_func *func;
601 func = list_entry(list, struct acpiphp_func, sibling);
Kristen Accardi20416ea2006-02-23 17:56:03 -0800602 if (!(func->flags & FUNC_HAS_DCK)) {
603 status = acpi_remove_notify_handler(func->handle,
Rajesh Shah42f49a62005-04-28 00:25:53 -0700604 ACPI_SYSTEM_NOTIFY,
605 handle_hotplug_event_func);
Kristen Accardi20416ea2006-02-23 17:56:03 -0800606 if (ACPI_FAILURE(status))
607 err("failed to remove notify handler\n");
608 }
Rajesh Shah42f49a62005-04-28 00:25:53 -0700609 pci_dev_put(func->pci_dev);
610 list_del(list);
611 kfree(func);
612 }
MUNEDA Takahiroe27da382006-02-23 17:56:08 -0800613 acpiphp_unregister_hotplug_slot(slot);
614 list_del(&slot->funcs);
Rajesh Shah42f49a62005-04-28 00:25:53 -0700615 kfree(slot);
616 slot = next;
617 }
618
619 pci_dev_put(bridge->pci_dev);
620 list_del(&bridge->list);
621 kfree(bridge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622}
623
Rajesh Shah364d5092005-04-28 00:25:54 -0700624static acpi_status
625cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
626{
627 struct acpiphp_bridge *bridge;
628
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +0900629 /* cleanup p2p bridges under this P2P bridge
630 in a depth-first manner */
631 acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
632 cleanup_p2p_bridge, NULL, NULL);
633
Rajesh Shah364d5092005-04-28 00:25:54 -0700634 if (!(bridge = acpiphp_handle_to_bridge(handle)))
635 return AE_OK;
636 cleanup_bridge(bridge);
637 return AE_OK;
638}
639
640static void remove_bridge(acpi_handle handle)
641{
642 struct acpiphp_bridge *bridge;
643
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +0900644 /* cleanup p2p bridges under this host bridge
645 in a depth-first manner */
646 acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
647 (u32)1, cleanup_p2p_bridge, NULL, NULL);
648
Rajesh Shah364d5092005-04-28 00:25:54 -0700649 bridge = acpiphp_handle_to_bridge(handle);
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +0900650 if (bridge)
Rajesh Shah364d5092005-04-28 00:25:54 -0700651 cleanup_bridge(bridge);
Rajesh Shah364d5092005-04-28 00:25:54 -0700652}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
Kenji Kaneshigea0d399a2005-04-28 00:25:59 -0700654static struct pci_dev * get_apic_pci_info(acpi_handle handle)
655{
656 struct acpi_pci_id id;
657 struct pci_bus *bus;
658 struct pci_dev *dev;
659
660 if (ACPI_FAILURE(acpi_get_pci_id(handle, &id)))
661 return NULL;
662
663 bus = pci_find_bus(id.segment, id.bus);
664 if (!bus)
665 return NULL;
666
667 dev = pci_get_slot(bus, PCI_DEVFN(id.device, id.function));
668 if (!dev)
669 return NULL;
670
671 if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) &&
672 (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC))
673 {
674 pci_dev_put(dev);
675 return NULL;
676 }
677
678 return dev;
679}
680
681static int get_gsi_base(acpi_handle handle, u32 *gsi_base)
682{
683 acpi_status status;
684 int result = -1;
685 unsigned long gsb;
686 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
687 union acpi_object *obj;
688 void *table;
689
690 status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb);
691 if (ACPI_SUCCESS(status)) {
692 *gsi_base = (u32)gsb;
693 return 0;
694 }
695
696 status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer);
697 if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer)
698 return -1;
699
700 obj = buffer.pointer;
701 if (obj->type != ACPI_TYPE_BUFFER)
702 goto out;
703
704 table = obj->buffer.pointer;
705 switch (((acpi_table_entry_header *)table)->type) {
706 case ACPI_MADT_IOSAPIC:
707 *gsi_base = ((struct acpi_table_iosapic *)table)->global_irq_base;
708 result = 0;
709 break;
710 case ACPI_MADT_IOAPIC:
711 *gsi_base = ((struct acpi_table_ioapic *)table)->global_irq_base;
712 result = 0;
713 break;
714 default:
715 break;
716 }
717 out:
Kristen Accardi81b26bc2006-04-18 14:36:43 -0700718 kfree(buffer.pointer);
Kenji Kaneshigea0d399a2005-04-28 00:25:59 -0700719 return result;
720}
721
722static acpi_status
723ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv)
724{
725 acpi_status status;
726 unsigned long sta;
727 acpi_handle tmp;
728 struct pci_dev *pdev;
729 u32 gsi_base;
730 u64 phys_addr;
731
732 /* Evaluate _STA if present */
733 status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
734 if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL)
735 return AE_CTRL_DEPTH;
736
737 /* Scan only PCI bus scope */
738 status = acpi_get_handle(handle, "_HID", &tmp);
739 if (ACPI_SUCCESS(status))
740 return AE_CTRL_DEPTH;
741
742 if (get_gsi_base(handle, &gsi_base))
743 return AE_OK;
744
745 pdev = get_apic_pci_info(handle);
746 if (!pdev)
747 return AE_OK;
748
749 if (pci_enable_device(pdev)) {
750 pci_dev_put(pdev);
751 return AE_OK;
752 }
753
754 pci_set_master(pdev);
755
756 if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)")) {
757 pci_disable_device(pdev);
758 pci_dev_put(pdev);
759 return AE_OK;
760 }
761
762 phys_addr = pci_resource_start(pdev, 0);
763 if (acpi_register_ioapic(handle, phys_addr, gsi_base)) {
764 pci_release_region(pdev, 0);
765 pci_disable_device(pdev);
766 pci_dev_put(pdev);
767 return AE_OK;
768 }
769
770 return AE_OK;
771}
772
773static int acpiphp_configure_ioapics(acpi_handle handle)
774{
775 acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
776 ACPI_UINT32_MAX, ioapic_add, NULL, NULL);
777 return 0;
778}
779
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780static int power_on_slot(struct acpiphp_slot *slot)
781{
782 acpi_status status;
783 struct acpiphp_func *func;
784 struct list_head *l;
785 int retval = 0;
786
787 /* if already enabled, just skip */
788 if (slot->flags & SLOT_POWEREDON)
789 goto err_exit;
790
791 list_for_each (l, &slot->funcs) {
792 func = list_entry(l, struct acpiphp_func, sibling);
793
794 if (func->flags & FUNC_HAS_PS0) {
795 dbg("%s: executing _PS0\n", __FUNCTION__);
796 status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL);
797 if (ACPI_FAILURE(status)) {
798 warn("%s: _PS0 failed\n", __FUNCTION__);
799 retval = -1;
800 goto err_exit;
801 } else
802 break;
803 }
804 }
805
806 /* TBD: evaluate _STA to check if the slot is enabled */
807
808 slot->flags |= SLOT_POWEREDON;
809
810 err_exit:
811 return retval;
812}
813
814
815static int power_off_slot(struct acpiphp_slot *slot)
816{
817 acpi_status status;
818 struct acpiphp_func *func;
819 struct list_head *l;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
821 int retval = 0;
822
823 /* if already disabled, just skip */
824 if ((slot->flags & SLOT_POWEREDON) == 0)
825 goto err_exit;
826
827 list_for_each (l, &slot->funcs) {
828 func = list_entry(l, struct acpiphp_func, sibling);
829
Rajesh Shah2f523b12005-04-28 00:25:55 -0700830 if (func->flags & FUNC_HAS_PS3) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL);
832 if (ACPI_FAILURE(status)) {
833 warn("%s: _PS3 failed\n", __FUNCTION__);
834 retval = -1;
835 goto err_exit;
836 } else
837 break;
838 }
839 }
840
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 /* TBD: evaluate _STA to check if the slot is disabled */
842
843 slot->flags &= (~SLOT_POWEREDON);
844
845 err_exit:
846 return retval;
847}
848
849
Kristen Accardi15a1ae72006-02-23 17:55:58 -0800850
851/**
852 * acpiphp_max_busnr - return the highest reserved bus number under
853 * the given bus.
854 * @bus: bus to start search with
855 *
856 */
857static unsigned char acpiphp_max_busnr(struct pci_bus *bus)
858{
859 struct list_head *tmp;
860 unsigned char max, n;
861
862 /*
863 * pci_bus_max_busnr will return the highest
864 * reserved busnr for all these children.
865 * that is equivalent to the bus->subordinate
866 * value. We don't want to use the parent's
867 * bus->subordinate value because it could have
868 * padding in it.
869 */
870 max = bus->secondary;
871
872 list_for_each(tmp, &bus->children) {
873 n = pci_bus_max_busnr(pci_bus_b(tmp));
874 if (n > max)
875 max = n;
876 }
877 return max;
878}
879
880
Kristen Accardi15a1ae72006-02-23 17:55:58 -0800881/**
882 * acpiphp_bus_add - add a new bus to acpi subsystem
883 * @func: acpiphp_func of the bridge
884 *
885 */
886static int acpiphp_bus_add(struct acpiphp_func *func)
887{
888 acpi_handle phandle;
889 struct acpi_device *device, *pdevice;
890 int ret_val;
891
892 acpi_get_parent(func->handle, &phandle);
893 if (acpi_bus_get_device(phandle, &pdevice)) {
894 dbg("no parent device, assuming NULL\n");
895 pdevice = NULL;
896 }
Kristen Accardi20416ea2006-02-23 17:56:03 -0800897 if (!acpi_bus_get_device(func->handle, &device)) {
898 dbg("bus exists... trim\n");
899 /* this shouldn't be in here, so remove
900 * the bus then re-add it...
901 */
902 ret_val = acpi_bus_trim(device, 1);
903 dbg("acpi_bus_trim return %x\n", ret_val);
904 }
905
906 ret_val = acpi_bus_add(&device, pdevice, func->handle,
907 ACPI_BUS_TYPE_DEVICE);
908 if (ret_val) {
909 dbg("error adding bus, %x\n",
910 -ret_val);
911 goto acpiphp_bus_add_out;
Kristen Accardi15a1ae72006-02-23 17:55:58 -0800912 }
913 /*
914 * try to start anyway. We could have failed to add
915 * simply because this bus had previously been added
916 * on another add. Don't bother with the return value
917 * we just keep going.
918 */
919 ret_val = acpi_bus_start(device);
920
921acpiphp_bus_add_out:
922 return ret_val;
923}
924
925
MUNEDA Takahiro92c9be92006-03-22 14:49:09 +0900926/**
927 * acpiphp_bus_trim - trim a bus from acpi subsystem
928 * @handle: handle to acpi namespace
929 *
930 */
931int acpiphp_bus_trim(acpi_handle handle)
932{
933 struct acpi_device *device;
934 int retval;
935
936 retval = acpi_bus_get_device(handle, &device);
937 if (retval) {
938 dbg("acpi_device not found\n");
939 return retval;
940 }
941
942 retval = acpi_bus_trim(device, 1);
943 if (retval)
944 err("cannot remove from acpi list\n");
945
946 return retval;
947}
Kristen Accardi15a1ae72006-02-23 17:55:58 -0800948
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949/**
950 * enable_device - enable, configure a slot
951 * @slot: slot to be enabled
952 *
953 * This function should be called per *physical slot*,
954 * not per each slot object in ACPI namespace.
955 *
956 */
957static int enable_device(struct acpiphp_slot *slot)
958{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 struct pci_dev *dev;
Rajesh Shah42f49a62005-04-28 00:25:53 -0700960 struct pci_bus *bus = slot->bridge->pci_bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 struct list_head *l;
962 struct acpiphp_func *func;
963 int retval = 0;
Rajesh Shah42f49a62005-04-28 00:25:53 -0700964 int num, max, pass;
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +0900965 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966
967 if (slot->flags & SLOT_ENABLED)
968 goto err_exit;
969
970 /* sanity check: dev should be NULL when hot-plugged in */
Rajesh Shah42f49a62005-04-28 00:25:53 -0700971 dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 if (dev) {
973 /* This case shouldn't happen */
974 err("pci_dev structure already exists.\n");
Rajesh Shah42f49a62005-04-28 00:25:53 -0700975 pci_dev_put(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 retval = -1;
977 goto err_exit;
978 }
979
Rajesh Shah42f49a62005-04-28 00:25:53 -0700980 num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0));
981 if (num == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 err("No new device found\n");
983 retval = -1;
984 goto err_exit;
985 }
986
Kristen Accardi15a1ae72006-02-23 17:55:58 -0800987 max = acpiphp_max_busnr(bus);
Rajesh Shah42f49a62005-04-28 00:25:53 -0700988 for (pass = 0; pass < 2; pass++) {
989 list_for_each_entry(dev, &bus->devices, bus_list) {
990 if (PCI_SLOT(dev->devfn) != slot->device)
991 continue;
992 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
Kristen Accardic64b5ee2005-12-14 09:37:26 -0800993 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
Rajesh Shah42f49a62005-04-28 00:25:53 -0700994 max = pci_scan_bridge(bus, dev, max, pass);
MUNEDA Takahiro92c9be92006-03-22 14:49:09 +0900995 if (pass && dev->subordinate)
Kristen Accardic64b5ee2005-12-14 09:37:26 -0800996 pci_bus_size_bridges(dev->subordinate);
997 }
Rajesh Shah42f49a62005-04-28 00:25:53 -0700998 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 }
1000
MUNEDA Takahiro92c9be92006-03-22 14:49:09 +09001001 list_for_each (l, &slot->funcs) {
1002 func = list_entry(l, struct acpiphp_func, sibling);
1003 acpiphp_bus_add(func);
1004 }
1005
Rajesh Shah42f49a62005-04-28 00:25:53 -07001006 pci_bus_assign_resources(bus);
Kristen Accardi8e5dce32005-10-18 17:21:40 -07001007 acpiphp_sanitize_bus(bus);
1008 pci_enable_bridges(bus);
Rajesh Shah42f49a62005-04-28 00:25:53 -07001009 pci_bus_add_devices(bus);
MUNEDA Takahiro0cccd0c2006-02-24 17:46:04 +09001010 acpiphp_set_hpp_values(slot->bridge->handle, bus);
1011 acpiphp_configure_ioapics(slot->bridge->handle);
Rajesh Shah42f49a62005-04-28 00:25:53 -07001012
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 /* associate pci_dev to our representation */
1014 list_for_each (l, &slot->funcs) {
1015 func = list_entry(l, struct acpiphp_func, sibling);
Rajesh Shah42f49a62005-04-28 00:25:53 -07001016 func->pci_dev = pci_get_slot(bus, PCI_DEVFN(slot->device,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 func->function));
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +09001018 if (!func->pci_dev)
1019 continue;
1020
1021 if (func->pci_dev->hdr_type != PCI_HEADER_TYPE_BRIDGE &&
1022 func->pci_dev->hdr_type != PCI_HEADER_TYPE_CARDBUS)
1023 continue;
1024
1025 status = find_p2p_bridge(func->handle, (u32)1, bus, NULL);
1026 if (ACPI_FAILURE(status))
1027 warn("find_p2p_bridge failed (error code = 0x%x)\n",
1028 status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 }
1030
1031 slot->flags |= SLOT_ENABLED;
1032
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 err_exit:
1034 return retval;
1035}
1036
1037
1038/**
1039 * disable_device - disable a slot
1040 */
1041static int disable_device(struct acpiphp_slot *slot)
1042{
1043 int retval = 0;
1044 struct acpiphp_func *func;
1045 struct list_head *l;
1046
1047 /* is this slot already disabled? */
1048 if (!(slot->flags & SLOT_ENABLED))
1049 goto err_exit;
1050
1051 list_for_each (l, &slot->funcs) {
1052 func = list_entry(l, struct acpiphp_func, sibling);
MUNEDA Takahiro92c9be92006-03-22 14:49:09 +09001053
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +09001054 if (func->bridge) {
1055 /* cleanup p2p bridges under this P2P bridge */
1056 cleanup_p2p_bridge(func->bridge->handle,
1057 (u32)1, NULL, NULL);
1058 func->bridge = NULL;
1059 }
1060
MUNEDA Takahiro92c9be92006-03-22 14:49:09 +09001061 acpiphp_bus_trim(func->handle);
1062 /* try to remove anyway.
1063 * acpiphp_bus_add might have been failed */
1064
Rajesh Shah42f49a62005-04-28 00:25:53 -07001065 if (!func->pci_dev)
1066 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067
Rajesh Shah42f49a62005-04-28 00:25:53 -07001068 pci_remove_bus_device(func->pci_dev);
1069 pci_dev_put(func->pci_dev);
1070 func->pci_dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 }
1072
1073 slot->flags &= (~SLOT_ENABLED);
1074
1075 err_exit:
1076 return retval;
1077}
1078
1079
1080/**
1081 * get_slot_status - get ACPI slot status
1082 *
1083 * if a slot has _STA for each function and if any one of them
1084 * returned non-zero status, return it
1085 *
1086 * if a slot doesn't have _STA and if any one of its functions'
1087 * configuration space is configured, return 0x0f as a _STA
1088 *
1089 * otherwise return 0
1090 */
1091static unsigned int get_slot_status(struct acpiphp_slot *slot)
1092{
1093 acpi_status status;
1094 unsigned long sta = 0;
1095 u32 dvid;
1096 struct list_head *l;
1097 struct acpiphp_func *func;
1098
1099 list_for_each (l, &slot->funcs) {
1100 func = list_entry(l, struct acpiphp_func, sibling);
1101
1102 if (func->flags & FUNC_HAS_STA) {
1103 status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta);
1104 if (ACPI_SUCCESS(status) && sta)
1105 break;
1106 } else {
1107 pci_bus_read_config_dword(slot->bridge->pci_bus,
1108 PCI_DEVFN(slot->device,
1109 func->function),
1110 PCI_VENDOR_ID, &dvid);
1111 if (dvid != 0xffffffff) {
1112 sta = ACPI_STA_ALL;
1113 break;
1114 }
1115 }
1116 }
1117
1118 return (unsigned int)sta;
1119}
1120
1121/**
Rajesh Shah8d50e332005-04-28 00:25:57 -07001122 * acpiphp_eject_slot - physically eject the slot
1123 */
1124static int acpiphp_eject_slot(struct acpiphp_slot *slot)
1125{
1126 acpi_status status;
1127 struct acpiphp_func *func;
1128 struct list_head *l;
1129 struct acpi_object_list arg_list;
1130 union acpi_object arg;
1131
1132 list_for_each (l, &slot->funcs) {
1133 func = list_entry(l, struct acpiphp_func, sibling);
1134
1135 /* We don't want to call _EJ0 on non-existing functions. */
1136 if ((func->flags & FUNC_HAS_EJ0)) {
1137 /* _EJ0 method take one argument */
1138 arg_list.count = 1;
1139 arg_list.pointer = &arg;
1140 arg.type = ACPI_TYPE_INTEGER;
1141 arg.integer.value = 1;
1142
1143 status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL);
1144 if (ACPI_FAILURE(status)) {
1145 warn("%s: _EJ0 failed\n", __FUNCTION__);
1146 return -1;
1147 } else
1148 break;
1149 }
1150 }
1151 return 0;
1152}
1153
1154/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 * acpiphp_check_bridge - re-enumerate devices
1156 *
1157 * Iterate over all slots under this bridge and make sure that if a
1158 * card is present they are enabled, and if not they are disabled.
1159 */
1160static int acpiphp_check_bridge(struct acpiphp_bridge *bridge)
1161{
1162 struct acpiphp_slot *slot;
1163 int retval = 0;
1164 int enabled, disabled;
1165
1166 enabled = disabled = 0;
1167
1168 for (slot = bridge->slots; slot; slot = slot->next) {
1169 unsigned int status = get_slot_status(slot);
1170 if (slot->flags & SLOT_ENABLED) {
1171 if (status == ACPI_STA_ALL)
1172 continue;
1173 retval = acpiphp_disable_slot(slot);
1174 if (retval) {
1175 err("Error occurred in disabling\n");
1176 goto err_exit;
Rajesh Shah8d50e332005-04-28 00:25:57 -07001177 } else {
1178 acpiphp_eject_slot(slot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 }
1180 disabled++;
1181 } else {
1182 if (status != ACPI_STA_ALL)
1183 continue;
1184 retval = acpiphp_enable_slot(slot);
1185 if (retval) {
1186 err("Error occurred in enabling\n");
1187 goto err_exit;
1188 }
1189 enabled++;
1190 }
1191 }
1192
1193 dbg("%s: %d enabled, %d disabled\n", __FUNCTION__, enabled, disabled);
1194
1195 err_exit:
1196 return retval;
1197}
1198
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001199static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge)
1200{
1201 u16 pci_cmd, pci_bctl;
1202 struct pci_dev *cdev;
1203
1204 /* Program hpp values for this device */
1205 if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL ||
1206 (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
1207 (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)))
1208 return;
1209 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
1210 bridge->hpp.cache_line_size);
1211 pci_write_config_byte(dev, PCI_LATENCY_TIMER,
1212 bridge->hpp.latency_timer);
1213 pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
Kristen Accardi783c49f2006-03-03 10:16:05 -08001214 if (bridge->hpp.enable_serr)
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001215 pci_cmd |= PCI_COMMAND_SERR;
1216 else
1217 pci_cmd &= ~PCI_COMMAND_SERR;
Kristen Accardi783c49f2006-03-03 10:16:05 -08001218 if (bridge->hpp.enable_perr)
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001219 pci_cmd |= PCI_COMMAND_PARITY;
1220 else
1221 pci_cmd &= ~PCI_COMMAND_PARITY;
1222 pci_write_config_word(dev, PCI_COMMAND, pci_cmd);
1223
1224 /* Program bridge control value and child devices */
1225 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
1226 pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER,
1227 bridge->hpp.latency_timer);
1228 pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl);
Kristen Accardi783c49f2006-03-03 10:16:05 -08001229 if (bridge->hpp.enable_serr)
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001230 pci_bctl |= PCI_BRIDGE_CTL_SERR;
1231 else
1232 pci_bctl &= ~PCI_BRIDGE_CTL_SERR;
Kristen Accardi783c49f2006-03-03 10:16:05 -08001233 if (bridge->hpp.enable_perr)
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001234 pci_bctl |= PCI_BRIDGE_CTL_PARITY;
1235 else
1236 pci_bctl &= ~PCI_BRIDGE_CTL_PARITY;
1237 pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl);
1238 if (dev->subordinate) {
1239 list_for_each_entry(cdev, &dev->subordinate->devices,
1240 bus_list)
1241 program_hpp(cdev, bridge);
1242 }
1243 }
1244}
1245
1246static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus)
1247{
1248 struct acpiphp_bridge bridge;
1249 struct pci_dev *dev;
1250
1251 memset(&bridge, 0, sizeof(bridge));
1252 bridge.handle = handle;
Kristen Accardi783c49f2006-03-03 10:16:05 -08001253 bridge.pci_dev = bus->self;
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001254 decode_hpp(&bridge);
1255 list_for_each_entry(dev, &bus->devices, bus_list)
1256 program_hpp(dev, &bridge);
1257
1258}
1259
1260/*
1261 * Remove devices for which we could not assign resources, call
1262 * arch specific code to fix-up the bus
1263 */
1264static void acpiphp_sanitize_bus(struct pci_bus *bus)
1265{
1266 struct pci_dev *dev;
1267 int i;
1268 unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM;
1269
1270 list_for_each_entry(dev, &bus->devices, bus_list) {
1271 for (i=0; i<PCI_BRIDGE_RESOURCES; i++) {
1272 struct resource *res = &dev->resource[i];
1273 if ((res->flags & type_mask) && !res->start &&
1274 res->end) {
1275 /* Could not assign a required resources
1276 * for this device, remove it */
1277 pci_remove_bus_device(dev);
1278 break;
1279 }
1280 }
1281 }
1282}
1283
1284/* Program resources in newly inserted bridge */
1285static int acpiphp_configure_bridge (acpi_handle handle)
1286{
1287 struct acpi_pci_id pci_id;
1288 struct pci_bus *bus;
1289
1290 if (ACPI_FAILURE(acpi_get_pci_id(handle, &pci_id))) {
1291 err("cannot get PCI domain and bus number for bridge\n");
1292 return -EINVAL;
1293 }
1294 bus = pci_find_bus(pci_id.segment, pci_id.bus);
1295 if (!bus) {
1296 err("cannot find bus %d:%d\n",
1297 pci_id.segment, pci_id.bus);
1298 return -EINVAL;
1299 }
1300
1301 pci_bus_size_bridges(bus);
1302 pci_bus_assign_resources(bus);
1303 acpiphp_sanitize_bus(bus);
1304 acpiphp_set_hpp_values(handle, bus);
1305 pci_enable_bridges(bus);
Kenji Kaneshigea0d399a2005-04-28 00:25:59 -07001306 acpiphp_configure_ioapics(handle);
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001307 return 0;
1308}
1309
1310static void handle_bridge_insertion(acpi_handle handle, u32 type)
1311{
1312 struct acpi_device *device, *pdevice;
1313 acpi_handle phandle;
1314
1315 if ((type != ACPI_NOTIFY_BUS_CHECK) &&
1316 (type != ACPI_NOTIFY_DEVICE_CHECK)) {
1317 err("unexpected notification type %d\n", type);
1318 return;
1319 }
1320
1321 acpi_get_parent(handle, &phandle);
1322 if (acpi_bus_get_device(phandle, &pdevice)) {
1323 dbg("no parent device, assuming NULL\n");
1324 pdevice = NULL;
1325 }
1326 if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) {
1327 err("cannot add bridge to acpi list\n");
1328 return;
1329 }
1330 if (!acpiphp_configure_bridge(handle) &&
1331 !acpi_bus_start(device))
1332 add_bridge(handle);
1333 else
1334 err("cannot configure and start bridge\n");
1335
1336}
1337
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338/*
1339 * ACPI event handlers
1340 */
1341
1342/**
1343 * handle_hotplug_event_bridge - handle ACPI event on bridges
1344 *
1345 * @handle: Notify()'ed acpi_handle
1346 * @type: Notify code
1347 * @context: pointer to acpiphp_bridge structure
1348 *
1349 * handles ACPI event notification on {host,p2p} bridges
1350 *
1351 */
1352static 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 };
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001358 struct acpi_device *device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001360 if (acpi_bus_get_device(handle, &device)) {
1361 /* This bridge must have just been physically inserted */
1362 handle_bridge_insertion(handle, type);
1363 return;
1364 }
1365
1366 bridge = acpiphp_handle_to_bridge(handle);
1367 if (!bridge) {
1368 err("cannot get bridge info\n");
1369 return;
1370 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371
1372 acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
1373
1374 switch (type) {
1375 case ACPI_NOTIFY_BUS_CHECK:
1376 /* bus re-enumerate */
1377 dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname);
1378 acpiphp_check_bridge(bridge);
1379 break;
1380
1381 case ACPI_NOTIFY_DEVICE_CHECK:
1382 /* device check */
1383 dbg("%s: Device check notify on %s\n", __FUNCTION__, objname);
1384 acpiphp_check_bridge(bridge);
1385 break;
1386
1387 case ACPI_NOTIFY_DEVICE_WAKE:
1388 /* wake event */
1389 dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname);
1390 break;
1391
1392 case ACPI_NOTIFY_EJECT_REQUEST:
1393 /* request device eject */
1394 dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname);
MUNEDA Takahiro551bcb72006-03-22 14:49:20 +09001395 if ((bridge->type != BRIDGE_TYPE_HOST) &&
1396 (bridge->flags & BRIDGE_HAS_EJ0)) {
1397 struct acpiphp_slot *slot;
1398 slot = bridge->func->slot;
1399 if (!acpiphp_disable_slot(slot))
1400 acpiphp_eject_slot(slot);
1401 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402 break;
1403
1404 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
1405 printk(KERN_ERR "Device %s cannot be configured due"
1406 " to a frequency mismatch\n", objname);
1407 break;
1408
1409 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
1410 printk(KERN_ERR "Device %s cannot be configured due"
1411 " to a bus mode mismatch\n", objname);
1412 break;
1413
1414 case ACPI_NOTIFY_POWER_FAULT:
1415 printk(KERN_ERR "Device %s has suffered a power fault\n",
1416 objname);
1417 break;
1418
1419 default:
1420 warn("notify_handler: unknown event type 0x%x for %s\n", type, objname);
1421 break;
1422 }
1423}
1424
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425/**
1426 * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots)
1427 *
1428 * @handle: Notify()'ed acpi_handle
1429 * @type: Notify code
1430 * @context: pointer to acpiphp_func structure
1431 *
1432 * handles ACPI event notification on slots
1433 *
1434 */
Kristen Accardi20416ea2006-02-23 17:56:03 -08001435void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436{
1437 struct acpiphp_func *func;
1438 char objname[64];
1439 struct acpi_buffer buffer = { .length = sizeof(objname),
1440 .pointer = objname };
1441
1442 acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
1443
1444 func = (struct acpiphp_func *)context;
1445
1446 switch (type) {
1447 case ACPI_NOTIFY_BUS_CHECK:
1448 /* bus re-enumerate */
1449 dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname);
1450 acpiphp_enable_slot(func->slot);
1451 break;
1452
1453 case ACPI_NOTIFY_DEVICE_CHECK:
1454 /* device check : re-enumerate from parent bus */
1455 dbg("%s: Device check notify on %s\n", __FUNCTION__, objname);
1456 acpiphp_check_bridge(func->slot->bridge);
1457 break;
1458
1459 case ACPI_NOTIFY_DEVICE_WAKE:
1460 /* wake event */
1461 dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname);
1462 break;
1463
1464 case ACPI_NOTIFY_EJECT_REQUEST:
1465 /* request device eject */
1466 dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname);
Rajesh Shah8d50e332005-04-28 00:25:57 -07001467 if (!(acpiphp_disable_slot(func->slot)))
1468 acpiphp_eject_slot(func->slot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 break;
1470
1471 default:
1472 warn("notify_handler: unknown event type 0x%x for %s\n", type, objname);
1473 break;
1474 }
1475}
1476
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001477
1478static acpi_status
1479find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
1480{
1481 int *count = (int *)context;
1482
Kristen Accardi783c49f2006-03-03 10:16:05 -08001483 if (acpi_root_bridge(handle)) {
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001484 acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
1485 handle_hotplug_event_bridge, NULL);
1486 (*count)++;
1487 }
1488 return AE_OK ;
1489}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490
1491static struct acpi_pci_driver acpi_pci_hp_driver = {
1492 .add = add_bridge,
1493 .remove = remove_bridge,
1494};
1495
1496/**
1497 * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures
1498 *
1499 */
1500int __init acpiphp_glue_init(void)
1501{
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001502 int num = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001504 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
1505 ACPI_UINT32_MAX, find_root_bridges, &num, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506
1507 if (num <= 0)
1508 return -1;
Rajesh Shah8e7561c2005-04-28 00:25:56 -07001509 else
1510 acpi_pci_register_driver(&acpi_pci_hp_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511
1512 return 0;
1513}
1514
1515
1516/**
1517 * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures
1518 *
1519 * This function frees all data allocated in acpiphp_glue_init()
1520 */
1521void __exit acpiphp_glue_exit(void)
1522{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523 acpi_pci_unregister_driver(&acpi_pci_hp_driver);
1524}
1525
1526
1527/**
1528 * acpiphp_get_num_slots - count number of slots in a system
1529 */
1530int __init acpiphp_get_num_slots(void)
1531{
1532 struct list_head *node;
1533 struct acpiphp_bridge *bridge;
1534 int num_slots;
1535
1536 num_slots = 0;
1537
1538 list_for_each (node, &bridge_list) {
1539 bridge = (struct acpiphp_bridge *)node;
Rajesh Shah42f49a62005-04-28 00:25:53 -07001540 dbg("Bus %04x:%02x has %d slot%s\n",
1541 pci_domain_nr(bridge->pci_bus),
1542 bridge->pci_bus->number, bridge->nr_slots,
1543 bridge->nr_slots == 1 ? "" : "s");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544 num_slots += bridge->nr_slots;
1545 }
1546
Rajesh Shah42f49a62005-04-28 00:25:53 -07001547 dbg("Total %d slots\n", num_slots);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 return num_slots;
1549}
1550
1551
1552#if 0
1553/**
1554 * acpiphp_for_each_slot - call function for each slot
1555 * @fn: callback function
1556 * @data: context to be passed to callback function
1557 *
1558 */
1559static int acpiphp_for_each_slot(acpiphp_callback fn, void *data)
1560{
1561 struct list_head *node;
1562 struct acpiphp_bridge *bridge;
1563 struct acpiphp_slot *slot;
1564 int retval = 0;
1565
1566 list_for_each (node, &bridge_list) {
1567 bridge = (struct acpiphp_bridge *)node;
1568 for (slot = bridge->slots; slot; slot = slot->next) {
1569 retval = fn(slot, data);
1570 if (!retval)
1571 goto err_exit;
1572 }
1573 }
1574
1575 err_exit:
1576 return retval;
1577}
1578#endif
1579
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580
1581/**
1582 * acpiphp_enable_slot - power on slot
1583 */
1584int acpiphp_enable_slot(struct acpiphp_slot *slot)
1585{
1586 int retval;
1587
Ingo Molnar6aa4cdd2006-01-13 16:02:15 +01001588 mutex_lock(&slot->crit_sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589
1590 /* wake up all functions */
1591 retval = power_on_slot(slot);
1592 if (retval)
1593 goto err_exit;
1594
MUNEDA Takahirocde0e5d2006-03-22 14:49:33 +09001595 if (get_slot_status(slot) == ACPI_STA_ALL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596 /* configure all functions */
1597 retval = enable_device(slot);
MUNEDA Takahirocde0e5d2006-03-22 14:49:33 +09001598 if (retval)
1599 power_off_slot(slot);
1600 } else {
1601 dbg("%s: Slot status is not ACPI_STA_ALL\n", __FUNCTION__);
1602 power_off_slot(slot);
1603 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604
1605 err_exit:
Ingo Molnar6aa4cdd2006-01-13 16:02:15 +01001606 mutex_unlock(&slot->crit_sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 return retval;
1608}
1609
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610/**
1611 * acpiphp_disable_slot - power off slot
1612 */
1613int acpiphp_disable_slot(struct acpiphp_slot *slot)
1614{
1615 int retval = 0;
1616
Ingo Molnar6aa4cdd2006-01-13 16:02:15 +01001617 mutex_lock(&slot->crit_sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618
1619 /* unconfigure all functions */
1620 retval = disable_device(slot);
1621 if (retval)
1622 goto err_exit;
1623
1624 /* power off all functions */
1625 retval = power_off_slot(slot);
1626 if (retval)
1627 goto err_exit;
1628
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629 err_exit:
Ingo Molnar6aa4cdd2006-01-13 16:02:15 +01001630 mutex_unlock(&slot->crit_sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631 return retval;
1632}
1633
1634
1635/*
1636 * slot enabled: 1
1637 * slot disabled: 0
1638 */
1639u8 acpiphp_get_power_status(struct acpiphp_slot *slot)
1640{
Rajesh Shah8d50e332005-04-28 00:25:57 -07001641 return (slot->flags & SLOT_POWEREDON);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642}
1643
1644
1645/*
1646 * latch closed: 1
1647 * latch open: 0
1648 */
1649u8 acpiphp_get_latch_status(struct acpiphp_slot *slot)
1650{
1651 unsigned int sta;
1652
1653 sta = get_slot_status(slot);
1654
1655 return (sta & ACPI_STA_SHOW_IN_UI) ? 1 : 0;
1656}
1657
1658
1659/*
1660 * adapter presence : 1
1661 * absence : 0
1662 */
1663u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot)
1664{
1665 unsigned int sta;
1666
1667 sta = get_slot_status(slot);
1668
1669 return (sta == 0) ? 0 : 1;
1670}
1671
1672
1673/*
1674 * pci address (seg/bus/dev)
1675 */
1676u32 acpiphp_get_address(struct acpiphp_slot *slot)
1677{
1678 u32 address;
Rajesh Shah42f49a62005-04-28 00:25:53 -07001679 struct pci_bus *pci_bus = slot->bridge->pci_bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680
Rajesh Shah42f49a62005-04-28 00:25:53 -07001681 address = (pci_domain_nr(pci_bus) << 16) |
1682 (pci_bus->number << 8) |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 slot->device;
1684
1685 return address;
1686}