Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * pci_root.c - ACPI PCI Root Bridge Driver ($Revision: 40 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/proc_fs.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/pm.h> | |
b67ea761 | 33 | #include <linux/pm_runtime.h> |
1da177e4 | 34 | #include <linux/pci.h> |
990a7ac5 | 35 | #include <linux/pci-acpi.h> |
1da177e4 | 36 | #include <linux/acpi.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
1da177e4 LT |
38 | #include <acpi/acpi_bus.h> |
39 | #include <acpi/acpi_drivers.h> | |
40 | ||
a192a958 LB |
41 | #define PREFIX "ACPI: " |
42 | ||
1da177e4 | 43 | #define _COMPONENT ACPI_PCI_COMPONENT |
f52fd66d | 44 | ACPI_MODULE_NAME("pci_root"); |
1da177e4 | 45 | #define ACPI_PCI_ROOT_CLASS "pci_bridge" |
1da177e4 | 46 | #define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge" |
4be44fcd LB |
47 | static int acpi_pci_root_add(struct acpi_device *device); |
48 | static int acpi_pci_root_remove(struct acpi_device *device, int type); | |
49 | static int acpi_pci_root_start(struct acpi_device *device); | |
1da177e4 | 50 | |
c97adf9e | 51 | static const struct acpi_device_id root_device_ids[] = { |
1ba90e3a TR |
52 | {"PNP0A03", 0}, |
53 | {"", 0}, | |
54 | }; | |
55 | MODULE_DEVICE_TABLE(acpi, root_device_ids); | |
56 | ||
1da177e4 | 57 | static struct acpi_driver acpi_pci_root_driver = { |
c2b6705b | 58 | .name = "pci_root", |
4be44fcd | 59 | .class = ACPI_PCI_ROOT_CLASS, |
1ba90e3a | 60 | .ids = root_device_ids, |
4be44fcd LB |
61 | .ops = { |
62 | .add = acpi_pci_root_add, | |
63 | .remove = acpi_pci_root_remove, | |
64 | .start = acpi_pci_root_start, | |
65 | }, | |
1da177e4 LT |
66 | }; |
67 | ||
1da177e4 LT |
68 | static LIST_HEAD(acpi_pci_roots); |
69 | ||
70 | static struct acpi_pci_driver *sub_driver; | |
63f10f0f | 71 | static DEFINE_MUTEX(osc_lock); |
1da177e4 LT |
72 | |
73 | int acpi_pci_register_driver(struct acpi_pci_driver *driver) | |
74 | { | |
75 | int n = 0; | |
c1aec834 | 76 | struct acpi_pci_root *root; |
1da177e4 LT |
77 | |
78 | struct acpi_pci_driver **pptr = &sub_driver; | |
79 | while (*pptr) | |
80 | pptr = &(*pptr)->next; | |
81 | *pptr = driver; | |
82 | ||
83 | if (!driver->add) | |
84 | return 0; | |
85 | ||
c1aec834 | 86 | list_for_each_entry(root, &acpi_pci_roots, node) { |
2d1e0a02 | 87 | driver->add(root->device->handle); |
1da177e4 LT |
88 | n++; |
89 | } | |
90 | ||
91 | return n; | |
92 | } | |
4be44fcd | 93 | |
1da177e4 LT |
94 | EXPORT_SYMBOL(acpi_pci_register_driver); |
95 | ||
96 | void acpi_pci_unregister_driver(struct acpi_pci_driver *driver) | |
97 | { | |
c1aec834 | 98 | struct acpi_pci_root *root; |
1da177e4 LT |
99 | |
100 | struct acpi_pci_driver **pptr = &sub_driver; | |
101 | while (*pptr) { | |
f10bb254 AM |
102 | if (*pptr == driver) |
103 | break; | |
104 | pptr = &(*pptr)->next; | |
1da177e4 | 105 | } |
f10bb254 AM |
106 | BUG_ON(!*pptr); |
107 | *pptr = (*pptr)->next; | |
1da177e4 LT |
108 | |
109 | if (!driver->remove) | |
110 | return; | |
111 | ||
c1aec834 | 112 | list_for_each_entry(root, &acpi_pci_roots, node) |
2d1e0a02 | 113 | driver->remove(root->device->handle); |
1da177e4 | 114 | } |
4be44fcd | 115 | |
1da177e4 LT |
116 | EXPORT_SYMBOL(acpi_pci_unregister_driver); |
117 | ||
d91a0078 JC |
118 | acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus) |
119 | { | |
c1aec834 | 120 | struct acpi_pci_root *root; |
d91a0078 | 121 | |
c1aec834 | 122 | list_for_each_entry(root, &acpi_pci_roots, node) |
0705495d | 123 | if ((root->segment == (u16) seg) && (root->bus_nr == (u16) bus)) |
c1aec834 | 124 | return root->device->handle; |
d91a0078 JC |
125 | return NULL; |
126 | } | |
127 | ||
128 | EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle); | |
129 | ||
27558203 AC |
130 | /** |
131 | * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge | |
132 | * @handle - the ACPI CA node in question. | |
133 | * | |
134 | * Note: we could make this API take a struct acpi_device * instead, but | |
135 | * for now, it's more convenient to operate on an acpi_handle. | |
136 | */ | |
137 | int acpi_is_root_bridge(acpi_handle handle) | |
138 | { | |
139 | int ret; | |
140 | struct acpi_device *device; | |
141 | ||
142 | ret = acpi_bus_get_device(handle, &device); | |
143 | if (ret) | |
144 | return 0; | |
145 | ||
146 | ret = acpi_match_device_ids(device, root_device_ids); | |
147 | if (ret) | |
148 | return 0; | |
149 | else | |
150 | return 1; | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(acpi_is_root_bridge); | |
153 | ||
1da177e4 | 154 | static acpi_status |
4be44fcd | 155 | get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) |
1da177e4 | 156 | { |
50dd0969 | 157 | int *busnr = data; |
1da177e4 LT |
158 | struct acpi_resource_address64 address; |
159 | ||
50eca3eb BM |
160 | if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 && |
161 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 && | |
162 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS64) | |
1da177e4 LT |
163 | return AE_OK; |
164 | ||
165 | acpi_resource_to_address64(resource, &address); | |
4be44fcd LB |
166 | if ((address.address_length > 0) && |
167 | (address.resource_type == ACPI_BUS_NUMBER_RANGE)) | |
50eca3eb | 168 | *busnr = address.minimum; |
1da177e4 LT |
169 | |
170 | return AE_OK; | |
171 | } | |
172 | ||
f5eebbe1 BH |
173 | static acpi_status try_get_root_bridge_busnr(acpi_handle handle, |
174 | unsigned long long *bus) | |
1da177e4 LT |
175 | { |
176 | acpi_status status; | |
f5eebbe1 | 177 | int busnum; |
1da177e4 | 178 | |
f5eebbe1 | 179 | busnum = -1; |
4be44fcd LB |
180 | status = |
181 | acpi_walk_resources(handle, METHOD_NAME__CRS, | |
f5eebbe1 | 182 | get_root_bridge_busnr_callback, &busnum); |
1da177e4 LT |
183 | if (ACPI_FAILURE(status)) |
184 | return status; | |
185 | /* Check if we really get a bus number from _CRS */ | |
f5eebbe1 | 186 | if (busnum == -1) |
1da177e4 | 187 | return AE_ERROR; |
f5eebbe1 | 188 | *bus = busnum; |
1da177e4 LT |
189 | return AE_OK; |
190 | } | |
191 | ||
2786f6e3 RZ |
192 | static void acpi_pci_bridge_scan(struct acpi_device *device) |
193 | { | |
194 | int status; | |
195 | struct acpi_device *child = NULL; | |
196 | ||
197 | if (device->flags.bus_address) | |
198 | if (device->parent && device->parent->ops.bind) { | |
199 | status = device->parent->ops.bind(device); | |
200 | if (!status) { | |
201 | list_for_each_entry(child, &device->children, node) | |
202 | acpi_pci_bridge_scan(child); | |
203 | } | |
204 | } | |
205 | } | |
206 | ||
3a9622dc | 207 | static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; |
63f10f0f KK |
208 | |
209 | static acpi_status acpi_pci_run_osc(acpi_handle handle, | |
210 | const u32 *capbuf, u32 *retval) | |
211 | { | |
3a9622dc SL |
212 | struct acpi_osc_context context = { |
213 | .uuid_str = pci_osc_uuid_str, | |
214 | .rev = 1, | |
215 | .cap.length = 12, | |
216 | .cap.pointer = (void *)capbuf, | |
217 | }; | |
63f10f0f | 218 | acpi_status status; |
63f10f0f | 219 | |
3a9622dc SL |
220 | status = acpi_run_osc(handle, &context); |
221 | if (ACPI_SUCCESS(status)) { | |
222 | *retval = *((u32 *)(context.ret.pointer + 8)); | |
223 | kfree(context.ret.pointer); | |
63f10f0f | 224 | } |
63f10f0f KK |
225 | return status; |
226 | } | |
227 | ||
228 | static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags) | |
229 | { | |
230 | acpi_status status; | |
231 | u32 support_set, result, capbuf[3]; | |
232 | ||
233 | /* do _OSC query for all possible controls */ | |
3a9622dc | 234 | support_set = root->osc_support_set | (flags & OSC_PCI_SUPPORT_MASKS); |
63f10f0f KK |
235 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; |
236 | capbuf[OSC_SUPPORT_TYPE] = support_set; | |
3a9622dc | 237 | capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS; |
63f10f0f KK |
238 | |
239 | status = acpi_pci_run_osc(root->device->handle, capbuf, &result); | |
240 | if (ACPI_SUCCESS(status)) { | |
241 | root->osc_support_set = support_set; | |
242 | root->osc_control_qry = result; | |
243 | root->osc_queried = 1; | |
244 | } | |
245 | return status; | |
246 | } | |
247 | ||
248 | static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) | |
249 | { | |
250 | acpi_status status; | |
251 | acpi_handle tmp; | |
252 | ||
253 | status = acpi_get_handle(root->device->handle, "_OSC", &tmp); | |
254 | if (ACPI_FAILURE(status)) | |
255 | return status; | |
256 | mutex_lock(&osc_lock); | |
257 | status = acpi_pci_query_osc(root, flags); | |
258 | mutex_unlock(&osc_lock); | |
259 | return status; | |
260 | } | |
261 | ||
76d56de5 | 262 | struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) |
63f10f0f KK |
263 | { |
264 | struct acpi_pci_root *root; | |
c1aec834 | 265 | |
63f10f0f KK |
266 | list_for_each_entry(root, &acpi_pci_roots, node) { |
267 | if (root->device->handle == handle) | |
268 | return root; | |
269 | } | |
270 | return NULL; | |
271 | } | |
76d56de5 | 272 | EXPORT_SYMBOL_GPL(acpi_pci_find_root); |
63f10f0f | 273 | |
2f7bbceb AC |
274 | struct acpi_handle_node { |
275 | struct list_head node; | |
276 | acpi_handle handle; | |
277 | }; | |
278 | ||
279 | /** | |
280 | * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev | |
281 | * @handle: the handle in question | |
282 | * | |
283 | * Given an ACPI CA handle, the desired PCI device is located in the | |
284 | * list of PCI devices. | |
285 | * | |
286 | * If the device is found, its reference count is increased and this | |
287 | * function returns a pointer to its data structure. The caller must | |
288 | * decrement the reference count by calling pci_dev_put(). | |
289 | * If no device is found, %NULL is returned. | |
290 | */ | |
291 | struct pci_dev *acpi_get_pci_dev(acpi_handle handle) | |
292 | { | |
293 | int dev, fn; | |
294 | unsigned long long adr; | |
295 | acpi_status status; | |
296 | acpi_handle phandle; | |
297 | struct pci_bus *pbus; | |
298 | struct pci_dev *pdev = NULL; | |
299 | struct acpi_handle_node *node, *tmp; | |
300 | struct acpi_pci_root *root; | |
301 | LIST_HEAD(device_list); | |
302 | ||
303 | /* | |
304 | * Walk up the ACPI CA namespace until we reach a PCI root bridge. | |
305 | */ | |
306 | phandle = handle; | |
307 | while (!acpi_is_root_bridge(phandle)) { | |
308 | node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); | |
309 | if (!node) | |
310 | goto out; | |
311 | ||
312 | INIT_LIST_HEAD(&node->node); | |
313 | node->handle = phandle; | |
314 | list_add(&node->node, &device_list); | |
315 | ||
316 | status = acpi_get_parent(phandle, &phandle); | |
317 | if (ACPI_FAILURE(status)) | |
318 | goto out; | |
319 | } | |
320 | ||
321 | root = acpi_pci_find_root(phandle); | |
322 | if (!root) | |
323 | goto out; | |
324 | ||
325 | pbus = root->bus; | |
326 | ||
327 | /* | |
328 | * Now, walk back down the PCI device tree until we return to our | |
329 | * original handle. Assumes that everything between the PCI root | |
330 | * bridge and the device we're looking for must be a P2P bridge. | |
331 | */ | |
332 | list_for_each_entry(node, &device_list, node) { | |
333 | acpi_handle hnd = node->handle; | |
334 | status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); | |
335 | if (ACPI_FAILURE(status)) | |
336 | goto out; | |
337 | dev = (adr >> 16) & 0xffff; | |
338 | fn = adr & 0xffff; | |
339 | ||
340 | pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); | |
412af978 | 341 | if (!pdev || hnd == handle) |
2f7bbceb AC |
342 | break; |
343 | ||
344 | pbus = pdev->subordinate; | |
345 | pci_dev_put(pdev); | |
497fb54f RW |
346 | |
347 | /* | |
348 | * This function may be called for a non-PCI device that has a | |
349 | * PCI parent (eg. a disk under a PCI SATA controller). In that | |
350 | * case pdev->subordinate will be NULL for the parent. | |
351 | */ | |
352 | if (!pbus) { | |
353 | dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n"); | |
354 | pdev = NULL; | |
355 | break; | |
356 | } | |
2f7bbceb AC |
357 | } |
358 | out: | |
359 | list_for_each_entry_safe(node, tmp, &device_list, node) | |
360 | kfree(node); | |
361 | ||
362 | return pdev; | |
363 | } | |
364 | EXPORT_SYMBOL_GPL(acpi_get_pci_dev); | |
365 | ||
63f10f0f | 366 | /** |
9f5404d8 | 367 | * acpi_pci_osc_control_set - commit requested control to Firmware |
63f10f0f KK |
368 | * @handle: acpi_handle for the target ACPI object |
369 | * @flags: driver's requested control bits | |
370 | * | |
371 | * Attempt to take control from Firmware on requested control bits. | |
372 | **/ | |
9f5404d8 | 373 | acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags) |
63f10f0f KK |
374 | { |
375 | acpi_status status; | |
376 | u32 control_req, result, capbuf[3]; | |
377 | acpi_handle tmp; | |
378 | struct acpi_pci_root *root; | |
379 | ||
380 | status = acpi_get_handle(handle, "_OSC", &tmp); | |
381 | if (ACPI_FAILURE(status)) | |
382 | return status; | |
383 | ||
3a9622dc | 384 | control_req = (flags & OSC_PCI_CONTROL_MASKS); |
63f10f0f KK |
385 | if (!control_req) |
386 | return AE_TYPE; | |
387 | ||
388 | root = acpi_pci_find_root(handle); | |
389 | if (!root) | |
390 | return AE_NOT_EXIST; | |
391 | ||
392 | mutex_lock(&osc_lock); | |
393 | /* No need to evaluate _OSC if the control was already granted. */ | |
394 | if ((root->osc_control_set & control_req) == control_req) | |
395 | goto out; | |
396 | ||
397 | /* Need to query controls first before requesting them */ | |
398 | if (!root->osc_queried) { | |
399 | status = acpi_pci_query_osc(root, root->osc_support_set); | |
400 | if (ACPI_FAILURE(status)) | |
401 | goto out; | |
402 | } | |
403 | if ((root->osc_control_qry & control_req) != control_req) { | |
404 | printk(KERN_DEBUG | |
405 | "Firmware did not grant requested _OSC control\n"); | |
406 | status = AE_SUPPORT; | |
407 | goto out; | |
408 | } | |
409 | ||
410 | capbuf[OSC_QUERY_TYPE] = 0; | |
411 | capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set; | |
412 | capbuf[OSC_CONTROL_TYPE] = root->osc_control_set | control_req; | |
413 | status = acpi_pci_run_osc(handle, capbuf, &result); | |
414 | if (ACPI_SUCCESS(status)) | |
415 | root->osc_control_set = result; | |
416 | out: | |
417 | mutex_unlock(&osc_lock); | |
418 | return status; | |
419 | } | |
9f5404d8 | 420 | EXPORT_SYMBOL(acpi_pci_osc_control_set); |
63f10f0f | 421 | |
b5678a34 | 422 | static int __devinit acpi_pci_root_add(struct acpi_device *device) |
1da177e4 | 423 | { |
f5eebbe1 BH |
424 | unsigned long long segment, bus; |
425 | acpi_status status; | |
426 | int result; | |
427 | struct acpi_pci_root *root; | |
428 | acpi_handle handle; | |
2786f6e3 | 429 | struct acpi_device *child; |
0ef5f8f6 | 430 | u32 flags, base_flags; |
1da177e4 | 431 | |
f5eebbe1 BH |
432 | segment = 0; |
433 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL, | |
434 | &segment); | |
435 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
436 | printk(KERN_ERR PREFIX "can't evaluate _SEG\n"); | |
437 | return -ENODEV; | |
438 | } | |
1da177e4 | 439 | |
f5eebbe1 BH |
440 | /* Check _CRS first, then _BBN. If no _BBN, default to zero. */ |
441 | bus = 0; | |
442 | status = try_get_root_bridge_busnr(device->handle, &bus); | |
443 | if (ACPI_FAILURE(status)) { | |
444 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, NULL, &bus); | |
445 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
446 | printk(KERN_ERR PREFIX | |
447 | "no bus number in _CRS and can't evaluate _BBN\n"); | |
448 | return -ENODEV; | |
449 | } | |
450 | } | |
1da177e4 | 451 | |
36bcbec7 | 452 | root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); |
1da177e4 | 453 | if (!root) |
d550d98d | 454 | return -ENOMEM; |
1da177e4 | 455 | |
f5eebbe1 | 456 | INIT_LIST_HEAD(&root->node); |
32917e5b | 457 | root->device = device; |
0705495d BH |
458 | root->segment = segment & 0xFFFF; |
459 | root->bus_nr = bus & 0xFF; | |
1da177e4 LT |
460 | strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); |
461 | strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); | |
db89b4f0 | 462 | device->driver_data = root; |
1da177e4 | 463 | |
990a7ac5 AP |
464 | /* |
465 | * All supported architectures that use ACPI have support for | |
466 | * PCI domains, so we indicate this in _OSC support capabilities. | |
467 | */ | |
0ef5f8f6 | 468 | flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; |
63f10f0f | 469 | acpi_pci_osc_support(root, flags); |
990a7ac5 | 470 | |
1da177e4 LT |
471 | /* |
472 | * TBD: Need PCI interface for enumeration/configuration of roots. | |
473 | */ | |
474 | ||
4be44fcd LB |
475 | /* TBD: Locking */ |
476 | list_add_tail(&root->node, &acpi_pci_roots); | |
1da177e4 | 477 | |
4be44fcd LB |
478 | printk(KERN_INFO PREFIX "%s [%s] (%04x:%02x)\n", |
479 | acpi_device_name(device), acpi_device_bid(device), | |
0705495d | 480 | root->segment, root->bus_nr); |
1da177e4 LT |
481 | |
482 | /* | |
483 | * Scan the Root Bridge | |
484 | * -------------------- | |
485 | * Must do this prior to any attempt to bind the root device, as the | |
486 | * PCI namespace does not get created until this call is made (and | |
487 | * thus the root bridge's pci_dev does not exist). | |
488 | */ | |
0705495d | 489 | root->bus = pci_acpi_scan_root(device, segment, bus); |
1da177e4 | 490 | if (!root->bus) { |
6468463a LB |
491 | printk(KERN_ERR PREFIX |
492 | "Bus %04x:%02x not present in PCI namespace\n", | |
0705495d | 493 | root->segment, root->bus_nr); |
1da177e4 LT |
494 | result = -ENODEV; |
495 | goto end; | |
496 | } | |
497 | ||
498 | /* | |
499 | * Attach ACPI-PCI Context | |
500 | * ----------------------- | |
501 | * Thus binding the ACPI and PCI devices. | |
502 | */ | |
499650de | 503 | result = acpi_pci_bind_root(device); |
1da177e4 LT |
504 | if (result) |
505 | goto end; | |
506 | ||
507 | /* | |
508 | * PCI Routing Table | |
509 | * ----------------- | |
510 | * Evaluate and parse _PRT, if exists. | |
511 | */ | |
2d1e0a02 | 512 | status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); |
1da177e4 | 513 | if (ACPI_SUCCESS(status)) |
859a3f86 | 514 | result = acpi_pci_irq_add_prt(device->handle, root->bus); |
1da177e4 | 515 | |
2786f6e3 RZ |
516 | /* |
517 | * Scan and bind all _ADR-Based Devices | |
518 | */ | |
519 | list_for_each_entry(child, &device->children, node) | |
520 | acpi_pci_bridge_scan(child); | |
521 | ||
0ef5f8f6 AP |
522 | /* Indicate support for various _OSC capabilities. */ |
523 | if (pci_ext_cfg_avail(root->bus->self)) | |
524 | flags |= OSC_EXT_PCI_CONFIG_SUPPORT; | |
3e1b1600 AP |
525 | if (pcie_aspm_enabled()) |
526 | flags |= OSC_ACTIVE_STATE_PWR_SUPPORT | | |
527 | OSC_CLOCK_PWR_CAPABILITY_SUPPORT; | |
07ae95f9 AP |
528 | if (pci_msi_enabled()) |
529 | flags |= OSC_MSI_SUPPORT; | |
0ef5f8f6 | 530 | if (flags != base_flags) |
63f10f0f | 531 | acpi_pci_osc_support(root, flags); |
0ef5f8f6 | 532 | |
b67ea761 RW |
533 | pci_acpi_add_bus_pm_notifier(device, root->bus); |
534 | if (device->wakeup.flags.run_wake) | |
535 | device_set_run_wake(root->bus->bridge, true); | |
536 | ||
f5eebbe1 | 537 | return 0; |
1da177e4 | 538 | |
f5eebbe1 BH |
539 | end: |
540 | if (!list_empty(&root->node)) | |
541 | list_del(&root->node); | |
542 | kfree(root); | |
d550d98d | 543 | return result; |
1da177e4 LT |
544 | } |
545 | ||
4be44fcd | 546 | static int acpi_pci_root_start(struct acpi_device *device) |
c431ada4 | 547 | { |
caf420c6 | 548 | struct acpi_pci_root *root = acpi_driver_data(device); |
c431ada4 | 549 | |
caf420c6 BH |
550 | pci_bus_add_devices(root->bus); |
551 | return 0; | |
c431ada4 | 552 | } |
1da177e4 | 553 | |
4be44fcd | 554 | static int acpi_pci_root_remove(struct acpi_device *device, int type) |
1da177e4 | 555 | { |
caf420c6 | 556 | struct acpi_pci_root *root = acpi_driver_data(device); |
1da177e4 | 557 | |
b67ea761 RW |
558 | device_set_run_wake(root->bus->bridge, false); |
559 | pci_acpi_remove_bus_pm_notifier(device); | |
560 | ||
1da177e4 | 561 | kfree(root); |
d550d98d | 562 | return 0; |
1da177e4 LT |
563 | } |
564 | ||
4be44fcd | 565 | static int __init acpi_pci_root_init(void) |
1da177e4 | 566 | { |
1da177e4 | 567 | if (acpi_pci_disabled) |
d550d98d | 568 | return 0; |
1da177e4 | 569 | |
7bc5e3f2 | 570 | pci_acpi_crs_quirks(); |
1da177e4 | 571 | if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0) |
d550d98d | 572 | return -ENODEV; |
1da177e4 | 573 | |
d550d98d | 574 | return 0; |
1da177e4 LT |
575 | } |
576 | ||
577 | subsys_initcall(acpi_pci_root_init); |