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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> |
852972ac | 36 | #include <linux/pci-aspm.h> |
1da177e4 | 37 | #include <linux/acpi.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
1da177e4 LT |
39 | #include <acpi/acpi_bus.h> |
40 | #include <acpi/acpi_drivers.h> | |
41 | ||
a192a958 LB |
42 | #define PREFIX "ACPI: " |
43 | ||
1da177e4 | 44 | #define _COMPONENT ACPI_PCI_COMPONENT |
f52fd66d | 45 | ACPI_MODULE_NAME("pci_root"); |
1da177e4 | 46 | #define ACPI_PCI_ROOT_CLASS "pci_bridge" |
1da177e4 | 47 | #define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge" |
4be44fcd LB |
48 | static int acpi_pci_root_add(struct acpi_device *device); |
49 | static int acpi_pci_root_remove(struct acpi_device *device, int type); | |
50 | static int acpi_pci_root_start(struct acpi_device *device); | |
1da177e4 | 51 | |
c97adf9e | 52 | static const struct acpi_device_id root_device_ids[] = { |
1ba90e3a TR |
53 | {"PNP0A03", 0}, |
54 | {"", 0}, | |
55 | }; | |
56 | MODULE_DEVICE_TABLE(acpi, root_device_ids); | |
57 | ||
1da177e4 | 58 | static struct acpi_driver acpi_pci_root_driver = { |
c2b6705b | 59 | .name = "pci_root", |
4be44fcd | 60 | .class = ACPI_PCI_ROOT_CLASS, |
1ba90e3a | 61 | .ids = root_device_ids, |
4be44fcd LB |
62 | .ops = { |
63 | .add = acpi_pci_root_add, | |
64 | .remove = acpi_pci_root_remove, | |
65 | .start = acpi_pci_root_start, | |
66 | }, | |
1da177e4 LT |
67 | }; |
68 | ||
1da177e4 LT |
69 | static LIST_HEAD(acpi_pci_roots); |
70 | ||
71 | static struct acpi_pci_driver *sub_driver; | |
63f10f0f | 72 | static DEFINE_MUTEX(osc_lock); |
1da177e4 LT |
73 | |
74 | int acpi_pci_register_driver(struct acpi_pci_driver *driver) | |
75 | { | |
76 | int n = 0; | |
c1aec834 | 77 | struct acpi_pci_root *root; |
1da177e4 LT |
78 | |
79 | struct acpi_pci_driver **pptr = &sub_driver; | |
80 | while (*pptr) | |
81 | pptr = &(*pptr)->next; | |
82 | *pptr = driver; | |
83 | ||
84 | if (!driver->add) | |
85 | return 0; | |
86 | ||
c1aec834 | 87 | list_for_each_entry(root, &acpi_pci_roots, node) { |
2d1e0a02 | 88 | driver->add(root->device->handle); |
1da177e4 LT |
89 | n++; |
90 | } | |
91 | ||
92 | return n; | |
93 | } | |
4be44fcd | 94 | |
1da177e4 LT |
95 | EXPORT_SYMBOL(acpi_pci_register_driver); |
96 | ||
97 | void acpi_pci_unregister_driver(struct acpi_pci_driver *driver) | |
98 | { | |
c1aec834 | 99 | struct acpi_pci_root *root; |
1da177e4 LT |
100 | |
101 | struct acpi_pci_driver **pptr = &sub_driver; | |
102 | while (*pptr) { | |
f10bb254 AM |
103 | if (*pptr == driver) |
104 | break; | |
105 | pptr = &(*pptr)->next; | |
1da177e4 | 106 | } |
f10bb254 AM |
107 | BUG_ON(!*pptr); |
108 | *pptr = (*pptr)->next; | |
1da177e4 LT |
109 | |
110 | if (!driver->remove) | |
111 | return; | |
112 | ||
c1aec834 | 113 | list_for_each_entry(root, &acpi_pci_roots, node) |
2d1e0a02 | 114 | driver->remove(root->device->handle); |
1da177e4 | 115 | } |
4be44fcd | 116 | |
1da177e4 LT |
117 | EXPORT_SYMBOL(acpi_pci_unregister_driver); |
118 | ||
d91a0078 JC |
119 | acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus) |
120 | { | |
c1aec834 | 121 | struct acpi_pci_root *root; |
d91a0078 | 122 | |
c1aec834 | 123 | list_for_each_entry(root, &acpi_pci_roots, node) |
6ad95513 BH |
124 | if ((root->segment == (u16) seg) && |
125 | (root->secondary.start == (u16) bus)) | |
c1aec834 | 126 | return root->device->handle; |
d91a0078 JC |
127 | return NULL; |
128 | } | |
129 | ||
130 | EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle); | |
131 | ||
27558203 AC |
132 | /** |
133 | * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge | |
134 | * @handle - the ACPI CA node in question. | |
135 | * | |
136 | * Note: we could make this API take a struct acpi_device * instead, but | |
137 | * for now, it's more convenient to operate on an acpi_handle. | |
138 | */ | |
139 | int acpi_is_root_bridge(acpi_handle handle) | |
140 | { | |
141 | int ret; | |
142 | struct acpi_device *device; | |
143 | ||
144 | ret = acpi_bus_get_device(handle, &device); | |
145 | if (ret) | |
146 | return 0; | |
147 | ||
148 | ret = acpi_match_device_ids(device, root_device_ids); | |
149 | if (ret) | |
150 | return 0; | |
151 | else | |
152 | return 1; | |
153 | } | |
154 | EXPORT_SYMBOL_GPL(acpi_is_root_bridge); | |
155 | ||
1da177e4 | 156 | static acpi_status |
4be44fcd | 157 | get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) |
1da177e4 | 158 | { |
6ad95513 | 159 | struct resource *res = data; |
1da177e4 LT |
160 | struct acpi_resource_address64 address; |
161 | ||
50eca3eb BM |
162 | if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 && |
163 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 && | |
164 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS64) | |
1da177e4 LT |
165 | return AE_OK; |
166 | ||
167 | acpi_resource_to_address64(resource, &address); | |
4be44fcd | 168 | if ((address.address_length > 0) && |
6ad95513 BH |
169 | (address.resource_type == ACPI_BUS_NUMBER_RANGE)) { |
170 | res->start = address.minimum; | |
171 | res->end = address.minimum + address.address_length - 1; | |
172 | } | |
1da177e4 LT |
173 | |
174 | return AE_OK; | |
175 | } | |
176 | ||
f5eebbe1 | 177 | static acpi_status try_get_root_bridge_busnr(acpi_handle handle, |
6ad95513 | 178 | struct resource *res) |
1da177e4 LT |
179 | { |
180 | acpi_status status; | |
181 | ||
6ad95513 | 182 | res->start = -1; |
4be44fcd LB |
183 | status = |
184 | acpi_walk_resources(handle, METHOD_NAME__CRS, | |
6ad95513 | 185 | get_root_bridge_busnr_callback, res); |
1da177e4 LT |
186 | if (ACPI_FAILURE(status)) |
187 | return status; | |
6ad95513 | 188 | if (res->start == -1) |
1da177e4 LT |
189 | return AE_ERROR; |
190 | return AE_OK; | |
191 | } | |
192 | ||
2786f6e3 RZ |
193 | static void acpi_pci_bridge_scan(struct acpi_device *device) |
194 | { | |
195 | int status; | |
196 | struct acpi_device *child = NULL; | |
197 | ||
198 | if (device->flags.bus_address) | |
199 | if (device->parent && device->parent->ops.bind) { | |
200 | status = device->parent->ops.bind(device); | |
201 | if (!status) { | |
202 | list_for_each_entry(child, &device->children, node) | |
203 | acpi_pci_bridge_scan(child); | |
204 | } | |
205 | } | |
206 | } | |
207 | ||
3a9622dc | 208 | static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; |
63f10f0f KK |
209 | |
210 | static acpi_status acpi_pci_run_osc(acpi_handle handle, | |
211 | const u32 *capbuf, u32 *retval) | |
212 | { | |
3a9622dc SL |
213 | struct acpi_osc_context context = { |
214 | .uuid_str = pci_osc_uuid_str, | |
215 | .rev = 1, | |
216 | .cap.length = 12, | |
217 | .cap.pointer = (void *)capbuf, | |
218 | }; | |
63f10f0f | 219 | acpi_status status; |
63f10f0f | 220 | |
3a9622dc SL |
221 | status = acpi_run_osc(handle, &context); |
222 | if (ACPI_SUCCESS(status)) { | |
223 | *retval = *((u32 *)(context.ret.pointer + 8)); | |
224 | kfree(context.ret.pointer); | |
63f10f0f | 225 | } |
63f10f0f KK |
226 | return status; |
227 | } | |
228 | ||
229 | static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags) | |
230 | { | |
231 | acpi_status status; | |
232 | u32 support_set, result, capbuf[3]; | |
233 | ||
234 | /* do _OSC query for all possible controls */ | |
3a9622dc | 235 | support_set = root->osc_support_set | (flags & OSC_PCI_SUPPORT_MASKS); |
63f10f0f KK |
236 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; |
237 | capbuf[OSC_SUPPORT_TYPE] = support_set; | |
3a9622dc | 238 | capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS; |
63f10f0f KK |
239 | |
240 | status = acpi_pci_run_osc(root->device->handle, capbuf, &result); | |
241 | if (ACPI_SUCCESS(status)) { | |
242 | root->osc_support_set = support_set; | |
243 | root->osc_control_qry = result; | |
244 | root->osc_queried = 1; | |
245 | } | |
246 | return status; | |
247 | } | |
248 | ||
249 | static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) | |
250 | { | |
251 | acpi_status status; | |
252 | acpi_handle tmp; | |
253 | ||
254 | status = acpi_get_handle(root->device->handle, "_OSC", &tmp); | |
255 | if (ACPI_FAILURE(status)) | |
256 | return status; | |
257 | mutex_lock(&osc_lock); | |
258 | status = acpi_pci_query_osc(root, flags); | |
259 | mutex_unlock(&osc_lock); | |
260 | return status; | |
261 | } | |
262 | ||
76d56de5 | 263 | struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) |
63f10f0f KK |
264 | { |
265 | struct acpi_pci_root *root; | |
c1aec834 | 266 | |
63f10f0f KK |
267 | list_for_each_entry(root, &acpi_pci_roots, node) { |
268 | if (root->device->handle == handle) | |
269 | return root; | |
270 | } | |
271 | return NULL; | |
272 | } | |
76d56de5 | 273 | EXPORT_SYMBOL_GPL(acpi_pci_find_root); |
63f10f0f | 274 | |
2f7bbceb AC |
275 | struct acpi_handle_node { |
276 | struct list_head node; | |
277 | acpi_handle handle; | |
278 | }; | |
279 | ||
280 | /** | |
281 | * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev | |
282 | * @handle: the handle in question | |
283 | * | |
284 | * Given an ACPI CA handle, the desired PCI device is located in the | |
285 | * list of PCI devices. | |
286 | * | |
287 | * If the device is found, its reference count is increased and this | |
288 | * function returns a pointer to its data structure. The caller must | |
289 | * decrement the reference count by calling pci_dev_put(). | |
290 | * If no device is found, %NULL is returned. | |
291 | */ | |
292 | struct pci_dev *acpi_get_pci_dev(acpi_handle handle) | |
293 | { | |
294 | int dev, fn; | |
295 | unsigned long long adr; | |
296 | acpi_status status; | |
297 | acpi_handle phandle; | |
298 | struct pci_bus *pbus; | |
299 | struct pci_dev *pdev = NULL; | |
300 | struct acpi_handle_node *node, *tmp; | |
301 | struct acpi_pci_root *root; | |
302 | LIST_HEAD(device_list); | |
303 | ||
304 | /* | |
305 | * Walk up the ACPI CA namespace until we reach a PCI root bridge. | |
306 | */ | |
307 | phandle = handle; | |
308 | while (!acpi_is_root_bridge(phandle)) { | |
309 | node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); | |
310 | if (!node) | |
311 | goto out; | |
312 | ||
313 | INIT_LIST_HEAD(&node->node); | |
314 | node->handle = phandle; | |
315 | list_add(&node->node, &device_list); | |
316 | ||
317 | status = acpi_get_parent(phandle, &phandle); | |
318 | if (ACPI_FAILURE(status)) | |
319 | goto out; | |
320 | } | |
321 | ||
322 | root = acpi_pci_find_root(phandle); | |
323 | if (!root) | |
324 | goto out; | |
325 | ||
326 | pbus = root->bus; | |
327 | ||
328 | /* | |
329 | * Now, walk back down the PCI device tree until we return to our | |
330 | * original handle. Assumes that everything between the PCI root | |
331 | * bridge and the device we're looking for must be a P2P bridge. | |
332 | */ | |
333 | list_for_each_entry(node, &device_list, node) { | |
334 | acpi_handle hnd = node->handle; | |
335 | status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); | |
336 | if (ACPI_FAILURE(status)) | |
337 | goto out; | |
338 | dev = (adr >> 16) & 0xffff; | |
339 | fn = adr & 0xffff; | |
340 | ||
341 | pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); | |
412af978 | 342 | if (!pdev || hnd == handle) |
2f7bbceb AC |
343 | break; |
344 | ||
345 | pbus = pdev->subordinate; | |
346 | pci_dev_put(pdev); | |
497fb54f RW |
347 | |
348 | /* | |
349 | * This function may be called for a non-PCI device that has a | |
350 | * PCI parent (eg. a disk under a PCI SATA controller). In that | |
351 | * case pdev->subordinate will be NULL for the parent. | |
352 | */ | |
353 | if (!pbus) { | |
354 | dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n"); | |
355 | pdev = NULL; | |
356 | break; | |
357 | } | |
2f7bbceb AC |
358 | } |
359 | out: | |
360 | list_for_each_entry_safe(node, tmp, &device_list, node) | |
361 | kfree(node); | |
362 | ||
363 | return pdev; | |
364 | } | |
365 | EXPORT_SYMBOL_GPL(acpi_get_pci_dev); | |
366 | ||
63f10f0f | 367 | /** |
9f5404d8 | 368 | * acpi_pci_osc_control_set - commit requested control to Firmware |
63f10f0f KK |
369 | * @handle: acpi_handle for the target ACPI object |
370 | * @flags: driver's requested control bits | |
371 | * | |
372 | * Attempt to take control from Firmware on requested control bits. | |
373 | **/ | |
9f5404d8 | 374 | acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags) |
63f10f0f KK |
375 | { |
376 | acpi_status status; | |
377 | u32 control_req, result, capbuf[3]; | |
378 | acpi_handle tmp; | |
379 | struct acpi_pci_root *root; | |
380 | ||
3a9622dc | 381 | control_req = (flags & OSC_PCI_CONTROL_MASKS); |
63f10f0f KK |
382 | if (!control_req) |
383 | return AE_TYPE; | |
384 | ||
385 | root = acpi_pci_find_root(handle); | |
386 | if (!root) | |
387 | return AE_NOT_EXIST; | |
388 | ||
b879dc4b RW |
389 | status = acpi_get_handle(handle, "_OSC", &tmp); |
390 | if (ACPI_FAILURE(status)) | |
391 | return status; | |
392 | ||
63f10f0f KK |
393 | mutex_lock(&osc_lock); |
394 | /* No need to evaluate _OSC if the control was already granted. */ | |
395 | if ((root->osc_control_set & control_req) == control_req) | |
396 | goto out; | |
397 | ||
398 | /* Need to query controls first before requesting them */ | |
399 | if (!root->osc_queried) { | |
400 | status = acpi_pci_query_osc(root, root->osc_support_set); | |
401 | if (ACPI_FAILURE(status)) | |
402 | goto out; | |
403 | } | |
404 | if ((root->osc_control_qry & control_req) != control_req) { | |
405 | printk(KERN_DEBUG | |
406 | "Firmware did not grant requested _OSC control\n"); | |
407 | status = AE_SUPPORT; | |
408 | goto out; | |
409 | } | |
410 | ||
411 | capbuf[OSC_QUERY_TYPE] = 0; | |
412 | capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set; | |
413 | capbuf[OSC_CONTROL_TYPE] = root->osc_control_set | control_req; | |
414 | status = acpi_pci_run_osc(handle, capbuf, &result); | |
415 | if (ACPI_SUCCESS(status)) | |
416 | root->osc_control_set = result; | |
417 | out: | |
418 | mutex_unlock(&osc_lock); | |
419 | return status; | |
420 | } | |
9f5404d8 | 421 | EXPORT_SYMBOL(acpi_pci_osc_control_set); |
63f10f0f | 422 | |
b5678a34 | 423 | static int __devinit acpi_pci_root_add(struct acpi_device *device) |
1da177e4 | 424 | { |
f5eebbe1 BH |
425 | unsigned long long segment, bus; |
426 | acpi_status status; | |
427 | int result; | |
428 | struct acpi_pci_root *root; | |
429 | acpi_handle handle; | |
2786f6e3 | 430 | struct acpi_device *child; |
0ef5f8f6 | 431 | u32 flags, base_flags; |
1da177e4 | 432 | |
6ad95513 BH |
433 | root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); |
434 | if (!root) | |
435 | return -ENOMEM; | |
436 | ||
f5eebbe1 BH |
437 | segment = 0; |
438 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL, | |
439 | &segment); | |
440 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
441 | printk(KERN_ERR PREFIX "can't evaluate _SEG\n"); | |
6ad95513 BH |
442 | result = -ENODEV; |
443 | goto end; | |
f5eebbe1 | 444 | } |
1da177e4 | 445 | |
f5eebbe1 | 446 | /* Check _CRS first, then _BBN. If no _BBN, default to zero. */ |
6ad95513 BH |
447 | root->secondary.flags = IORESOURCE_BUS; |
448 | status = try_get_root_bridge_busnr(device->handle, &root->secondary); | |
f5eebbe1 | 449 | if (ACPI_FAILURE(status)) { |
6ad95513 BH |
450 | /* |
451 | * We need both the start and end of the downstream bus range | |
452 | * to interpret _CBA (MMCONFIG base address), so it really is | |
453 | * supposed to be in _CRS. If we don't find it there, all we | |
454 | * can do is assume [_BBN-0xFF] or [0-0xFF]. | |
455 | */ | |
456 | root->secondary.end = 0xFF; | |
457 | printk(KERN_WARNING FW_BUG PREFIX | |
458 | "no secondary bus range in _CRS\n"); | |
f5eebbe1 | 459 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, NULL, &bus); |
6ad95513 BH |
460 | if (ACPI_SUCCESS(status)) |
461 | root->secondary.start = bus; | |
462 | else if (status == AE_NOT_FOUND) | |
463 | root->secondary.start = 0; | |
464 | else { | |
465 | printk(KERN_ERR PREFIX "can't evaluate _BBN\n"); | |
466 | result = -ENODEV; | |
467 | goto end; | |
f5eebbe1 BH |
468 | } |
469 | } | |
1da177e4 | 470 | |
f5eebbe1 | 471 | INIT_LIST_HEAD(&root->node); |
32917e5b | 472 | root->device = device; |
0705495d | 473 | root->segment = segment & 0xFFFF; |
1da177e4 LT |
474 | strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); |
475 | strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); | |
db89b4f0 | 476 | device->driver_data = root; |
1da177e4 | 477 | |
990a7ac5 AP |
478 | /* |
479 | * All supported architectures that use ACPI have support for | |
480 | * PCI domains, so we indicate this in _OSC support capabilities. | |
481 | */ | |
0ef5f8f6 | 482 | flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; |
63f10f0f | 483 | acpi_pci_osc_support(root, flags); |
990a7ac5 | 484 | |
1da177e4 LT |
485 | /* |
486 | * TBD: Need PCI interface for enumeration/configuration of roots. | |
487 | */ | |
488 | ||
4be44fcd LB |
489 | /* TBD: Locking */ |
490 | list_add_tail(&root->node, &acpi_pci_roots); | |
1da177e4 | 491 | |
6ad95513 | 492 | printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n", |
4be44fcd | 493 | acpi_device_name(device), acpi_device_bid(device), |
6ad95513 | 494 | root->segment, &root->secondary); |
1da177e4 LT |
495 | |
496 | /* | |
497 | * Scan the Root Bridge | |
498 | * -------------------- | |
499 | * Must do this prior to any attempt to bind the root device, as the | |
500 | * PCI namespace does not get created until this call is made (and | |
501 | * thus the root bridge's pci_dev does not exist). | |
502 | */ | |
57283776 | 503 | root->bus = pci_acpi_scan_root(root); |
1da177e4 | 504 | if (!root->bus) { |
6468463a LB |
505 | printk(KERN_ERR PREFIX |
506 | "Bus %04x:%02x not present in PCI namespace\n", | |
6ad95513 | 507 | root->segment, (unsigned int)root->secondary.start); |
1da177e4 LT |
508 | result = -ENODEV; |
509 | goto end; | |
510 | } | |
511 | ||
512 | /* | |
513 | * Attach ACPI-PCI Context | |
514 | * ----------------------- | |
515 | * Thus binding the ACPI and PCI devices. | |
516 | */ | |
499650de | 517 | result = acpi_pci_bind_root(device); |
1da177e4 LT |
518 | if (result) |
519 | goto end; | |
520 | ||
521 | /* | |
522 | * PCI Routing Table | |
523 | * ----------------- | |
524 | * Evaluate and parse _PRT, if exists. | |
525 | */ | |
2d1e0a02 | 526 | status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); |
1da177e4 | 527 | if (ACPI_SUCCESS(status)) |
859a3f86 | 528 | result = acpi_pci_irq_add_prt(device->handle, root->bus); |
1da177e4 | 529 | |
2786f6e3 RZ |
530 | /* |
531 | * Scan and bind all _ADR-Based Devices | |
532 | */ | |
533 | list_for_each_entry(child, &device->children, node) | |
534 | acpi_pci_bridge_scan(child); | |
535 | ||
0ef5f8f6 AP |
536 | /* Indicate support for various _OSC capabilities. */ |
537 | if (pci_ext_cfg_avail(root->bus->self)) | |
538 | flags |= OSC_EXT_PCI_CONFIG_SUPPORT; | |
3e1b1600 AP |
539 | if (pcie_aspm_enabled()) |
540 | flags |= OSC_ACTIVE_STATE_PWR_SUPPORT | | |
541 | OSC_CLOCK_PWR_CAPABILITY_SUPPORT; | |
07ae95f9 AP |
542 | if (pci_msi_enabled()) |
543 | flags |= OSC_MSI_SUPPORT; | |
0ef5f8f6 | 544 | if (flags != base_flags) |
63f10f0f | 545 | acpi_pci_osc_support(root, flags); |
0ef5f8f6 | 546 | |
852972ac MG |
547 | status = acpi_pci_osc_control_set(root->device->handle, |
548 | OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL); | |
549 | ||
550 | if (ACPI_FAILURE(status)) { | |
551 | printk(KERN_INFO "Unable to assume PCIe control: Disabling ASPM\n"); | |
552 | pcie_no_aspm(); | |
553 | } | |
554 | ||
b67ea761 RW |
555 | pci_acpi_add_bus_pm_notifier(device, root->bus); |
556 | if (device->wakeup.flags.run_wake) | |
557 | device_set_run_wake(root->bus->bridge, true); | |
558 | ||
f5eebbe1 | 559 | return 0; |
1da177e4 | 560 | |
f5eebbe1 BH |
561 | end: |
562 | if (!list_empty(&root->node)) | |
563 | list_del(&root->node); | |
564 | kfree(root); | |
d550d98d | 565 | return result; |
1da177e4 LT |
566 | } |
567 | ||
4be44fcd | 568 | static int acpi_pci_root_start(struct acpi_device *device) |
c431ada4 | 569 | { |
caf420c6 | 570 | struct acpi_pci_root *root = acpi_driver_data(device); |
c431ada4 | 571 | |
caf420c6 BH |
572 | pci_bus_add_devices(root->bus); |
573 | return 0; | |
c431ada4 | 574 | } |
1da177e4 | 575 | |
4be44fcd | 576 | static int acpi_pci_root_remove(struct acpi_device *device, int type) |
1da177e4 | 577 | { |
caf420c6 | 578 | struct acpi_pci_root *root = acpi_driver_data(device); |
1da177e4 | 579 | |
b67ea761 RW |
580 | device_set_run_wake(root->bus->bridge, false); |
581 | pci_acpi_remove_bus_pm_notifier(device); | |
582 | ||
1da177e4 | 583 | kfree(root); |
d550d98d | 584 | return 0; |
1da177e4 LT |
585 | } |
586 | ||
4be44fcd | 587 | static int __init acpi_pci_root_init(void) |
1da177e4 | 588 | { |
1da177e4 | 589 | if (acpi_pci_disabled) |
d550d98d | 590 | return 0; |
1da177e4 | 591 | |
7bc5e3f2 | 592 | pci_acpi_crs_quirks(); |
1da177e4 | 593 | if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0) |
d550d98d | 594 | return -ENODEV; |
1da177e4 | 595 | |
d550d98d | 596 | return 0; |
1da177e4 LT |
597 | } |
598 | ||
599 | subsys_initcall(acpi_pci_root_init); |