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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> |
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) |
6ad95513 BH |
123 | if ((root->segment == (u16) seg) && |
124 | (root->secondary.start == (u16) bus)) | |
c1aec834 | 125 | return root->device->handle; |
d91a0078 JC |
126 | return NULL; |
127 | } | |
128 | ||
129 | EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle); | |
130 | ||
27558203 AC |
131 | /** |
132 | * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge | |
133 | * @handle - the ACPI CA node in question. | |
134 | * | |
135 | * Note: we could make this API take a struct acpi_device * instead, but | |
136 | * for now, it's more convenient to operate on an acpi_handle. | |
137 | */ | |
138 | int acpi_is_root_bridge(acpi_handle handle) | |
139 | { | |
140 | int ret; | |
141 | struct acpi_device *device; | |
142 | ||
143 | ret = acpi_bus_get_device(handle, &device); | |
144 | if (ret) | |
145 | return 0; | |
146 | ||
147 | ret = acpi_match_device_ids(device, root_device_ids); | |
148 | if (ret) | |
149 | return 0; | |
150 | else | |
151 | return 1; | |
152 | } | |
153 | EXPORT_SYMBOL_GPL(acpi_is_root_bridge); | |
154 | ||
1da177e4 | 155 | static acpi_status |
4be44fcd | 156 | get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) |
1da177e4 | 157 | { |
6ad95513 | 158 | struct resource *res = data; |
1da177e4 LT |
159 | struct acpi_resource_address64 address; |
160 | ||
50eca3eb BM |
161 | if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 && |
162 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 && | |
163 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS64) | |
1da177e4 LT |
164 | return AE_OK; |
165 | ||
166 | acpi_resource_to_address64(resource, &address); | |
4be44fcd | 167 | if ((address.address_length > 0) && |
6ad95513 BH |
168 | (address.resource_type == ACPI_BUS_NUMBER_RANGE)) { |
169 | res->start = address.minimum; | |
170 | res->end = address.minimum + address.address_length - 1; | |
171 | } | |
1da177e4 LT |
172 | |
173 | return AE_OK; | |
174 | } | |
175 | ||
f5eebbe1 | 176 | static acpi_status try_get_root_bridge_busnr(acpi_handle handle, |
6ad95513 | 177 | struct resource *res) |
1da177e4 LT |
178 | { |
179 | acpi_status status; | |
180 | ||
6ad95513 | 181 | res->start = -1; |
4be44fcd LB |
182 | status = |
183 | acpi_walk_resources(handle, METHOD_NAME__CRS, | |
6ad95513 | 184 | get_root_bridge_busnr_callback, res); |
1da177e4 LT |
185 | if (ACPI_FAILURE(status)) |
186 | return status; | |
6ad95513 | 187 | if (res->start == -1) |
1da177e4 LT |
188 | return AE_ERROR; |
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 | ||
ab8e8957 RW |
228 | static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, |
229 | u32 support, | |
230 | u32 *control) | |
63f10f0f KK |
231 | { |
232 | acpi_status status; | |
ab8e8957 RW |
233 | u32 result, capbuf[3]; |
234 | ||
235 | support &= OSC_PCI_SUPPORT_MASKS; | |
236 | support |= root->osc_support_set; | |
63f10f0f | 237 | |
63f10f0f | 238 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; |
ab8e8957 RW |
239 | capbuf[OSC_SUPPORT_TYPE] = support; |
240 | if (control) { | |
241 | *control &= OSC_PCI_CONTROL_MASKS; | |
242 | capbuf[OSC_CONTROL_TYPE] = *control | root->osc_control_set; | |
243 | } else { | |
244 | /* Run _OSC query for all possible controls. */ | |
245 | capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS; | |
246 | } | |
63f10f0f KK |
247 | |
248 | status = acpi_pci_run_osc(root->device->handle, capbuf, &result); | |
249 | if (ACPI_SUCCESS(status)) { | |
ab8e8957 | 250 | root->osc_support_set = support; |
2b8fd918 | 251 | if (control) |
ab8e8957 | 252 | *control = result; |
63f10f0f KK |
253 | } |
254 | return status; | |
255 | } | |
256 | ||
257 | static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) | |
258 | { | |
259 | acpi_status status; | |
260 | acpi_handle tmp; | |
261 | ||
262 | status = acpi_get_handle(root->device->handle, "_OSC", &tmp); | |
263 | if (ACPI_FAILURE(status)) | |
264 | return status; | |
265 | mutex_lock(&osc_lock); | |
ab8e8957 | 266 | status = acpi_pci_query_osc(root, flags, NULL); |
63f10f0f KK |
267 | mutex_unlock(&osc_lock); |
268 | return status; | |
269 | } | |
270 | ||
76d56de5 | 271 | struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) |
63f10f0f KK |
272 | { |
273 | struct acpi_pci_root *root; | |
c1aec834 | 274 | |
63f10f0f KK |
275 | list_for_each_entry(root, &acpi_pci_roots, node) { |
276 | if (root->device->handle == handle) | |
277 | return root; | |
278 | } | |
279 | return NULL; | |
280 | } | |
76d56de5 | 281 | EXPORT_SYMBOL_GPL(acpi_pci_find_root); |
63f10f0f | 282 | |
2f7bbceb AC |
283 | struct acpi_handle_node { |
284 | struct list_head node; | |
285 | acpi_handle handle; | |
286 | }; | |
287 | ||
288 | /** | |
289 | * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev | |
290 | * @handle: the handle in question | |
291 | * | |
292 | * Given an ACPI CA handle, the desired PCI device is located in the | |
293 | * list of PCI devices. | |
294 | * | |
295 | * If the device is found, its reference count is increased and this | |
296 | * function returns a pointer to its data structure. The caller must | |
297 | * decrement the reference count by calling pci_dev_put(). | |
298 | * If no device is found, %NULL is returned. | |
299 | */ | |
300 | struct pci_dev *acpi_get_pci_dev(acpi_handle handle) | |
301 | { | |
302 | int dev, fn; | |
303 | unsigned long long adr; | |
304 | acpi_status status; | |
305 | acpi_handle phandle; | |
306 | struct pci_bus *pbus; | |
307 | struct pci_dev *pdev = NULL; | |
308 | struct acpi_handle_node *node, *tmp; | |
309 | struct acpi_pci_root *root; | |
310 | LIST_HEAD(device_list); | |
311 | ||
312 | /* | |
313 | * Walk up the ACPI CA namespace until we reach a PCI root bridge. | |
314 | */ | |
315 | phandle = handle; | |
316 | while (!acpi_is_root_bridge(phandle)) { | |
317 | node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); | |
318 | if (!node) | |
319 | goto out; | |
320 | ||
321 | INIT_LIST_HEAD(&node->node); | |
322 | node->handle = phandle; | |
323 | list_add(&node->node, &device_list); | |
324 | ||
325 | status = acpi_get_parent(phandle, &phandle); | |
326 | if (ACPI_FAILURE(status)) | |
327 | goto out; | |
328 | } | |
329 | ||
330 | root = acpi_pci_find_root(phandle); | |
331 | if (!root) | |
332 | goto out; | |
333 | ||
334 | pbus = root->bus; | |
335 | ||
336 | /* | |
337 | * Now, walk back down the PCI device tree until we return to our | |
338 | * original handle. Assumes that everything between the PCI root | |
339 | * bridge and the device we're looking for must be a P2P bridge. | |
340 | */ | |
341 | list_for_each_entry(node, &device_list, node) { | |
342 | acpi_handle hnd = node->handle; | |
343 | status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); | |
344 | if (ACPI_FAILURE(status)) | |
345 | goto out; | |
346 | dev = (adr >> 16) & 0xffff; | |
347 | fn = adr & 0xffff; | |
348 | ||
349 | pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); | |
412af978 | 350 | if (!pdev || hnd == handle) |
2f7bbceb AC |
351 | break; |
352 | ||
353 | pbus = pdev->subordinate; | |
354 | pci_dev_put(pdev); | |
497fb54f RW |
355 | |
356 | /* | |
357 | * This function may be called for a non-PCI device that has a | |
358 | * PCI parent (eg. a disk under a PCI SATA controller). In that | |
359 | * case pdev->subordinate will be NULL for the parent. | |
360 | */ | |
361 | if (!pbus) { | |
362 | dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n"); | |
363 | pdev = NULL; | |
364 | break; | |
365 | } | |
2f7bbceb AC |
366 | } |
367 | out: | |
368 | list_for_each_entry_safe(node, tmp, &device_list, node) | |
369 | kfree(node); | |
370 | ||
371 | return pdev; | |
372 | } | |
373 | EXPORT_SYMBOL_GPL(acpi_get_pci_dev); | |
374 | ||
63f10f0f | 375 | /** |
75fb60f2 RW |
376 | * acpi_pci_osc_control_set - Request control of PCI root _OSC features. |
377 | * @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex). | |
378 | * @mask: Mask of _OSC bits to request control of, place to store control mask. | |
379 | * @req: Mask of _OSC bits the control of is essential to the caller. | |
63f10f0f | 380 | * |
75fb60f2 RW |
381 | * Run _OSC query for @mask and if that is successful, compare the returned |
382 | * mask of control bits with @req. If all of the @req bits are set in the | |
383 | * returned mask, run _OSC request for it. | |
384 | * | |
385 | * The variable at the @mask address may be modified regardless of whether or | |
386 | * not the function returns success. On success it will contain the mask of | |
387 | * _OSC bits the BIOS has granted control of, but its contents are meaningless | |
388 | * on failure. | |
63f10f0f | 389 | **/ |
75fb60f2 | 390 | acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req) |
63f10f0f | 391 | { |
75fb60f2 | 392 | struct acpi_pci_root *root; |
63f10f0f | 393 | acpi_status status; |
75fb60f2 | 394 | u32 ctrl, capbuf[3]; |
63f10f0f | 395 | acpi_handle tmp; |
63f10f0f | 396 | |
75fb60f2 RW |
397 | if (!mask) |
398 | return AE_BAD_PARAMETER; | |
399 | ||
400 | ctrl = *mask & OSC_PCI_CONTROL_MASKS; | |
401 | if ((ctrl & req) != req) | |
63f10f0f KK |
402 | return AE_TYPE; |
403 | ||
404 | root = acpi_pci_find_root(handle); | |
405 | if (!root) | |
406 | return AE_NOT_EXIST; | |
407 | ||
b879dc4b RW |
408 | status = acpi_get_handle(handle, "_OSC", &tmp); |
409 | if (ACPI_FAILURE(status)) | |
410 | return status; | |
411 | ||
63f10f0f | 412 | mutex_lock(&osc_lock); |
75fb60f2 RW |
413 | |
414 | *mask = ctrl | root->osc_control_set; | |
63f10f0f | 415 | /* No need to evaluate _OSC if the control was already granted. */ |
75fb60f2 | 416 | if ((root->osc_control_set & ctrl) == ctrl) |
63f10f0f KK |
417 | goto out; |
418 | ||
75fb60f2 RW |
419 | /* Need to check the available controls bits before requesting them. */ |
420 | while (*mask) { | |
421 | status = acpi_pci_query_osc(root, root->osc_support_set, mask); | |
422 | if (ACPI_FAILURE(status)) | |
423 | goto out; | |
424 | if (ctrl == *mask) | |
425 | break; | |
426 | ctrl = *mask; | |
427 | } | |
2b8fd918 | 428 | |
75fb60f2 | 429 | if ((ctrl & req) != req) { |
63f10f0f KK |
430 | status = AE_SUPPORT; |
431 | goto out; | |
432 | } | |
433 | ||
434 | capbuf[OSC_QUERY_TYPE] = 0; | |
435 | capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set; | |
75fb60f2 RW |
436 | capbuf[OSC_CONTROL_TYPE] = ctrl; |
437 | status = acpi_pci_run_osc(handle, capbuf, mask); | |
63f10f0f | 438 | if (ACPI_SUCCESS(status)) |
75fb60f2 | 439 | root->osc_control_set = *mask; |
63f10f0f KK |
440 | out: |
441 | mutex_unlock(&osc_lock); | |
442 | return status; | |
443 | } | |
9f5404d8 | 444 | EXPORT_SYMBOL(acpi_pci_osc_control_set); |
63f10f0f | 445 | |
b5678a34 | 446 | static int __devinit acpi_pci_root_add(struct acpi_device *device) |
1da177e4 | 447 | { |
f5eebbe1 BH |
448 | unsigned long long segment, bus; |
449 | acpi_status status; | |
450 | int result; | |
451 | struct acpi_pci_root *root; | |
452 | acpi_handle handle; | |
2786f6e3 | 453 | struct acpi_device *child; |
0ef5f8f6 | 454 | u32 flags, base_flags; |
1da177e4 | 455 | |
6ad95513 BH |
456 | root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); |
457 | if (!root) | |
458 | return -ENOMEM; | |
459 | ||
f5eebbe1 BH |
460 | segment = 0; |
461 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL, | |
462 | &segment); | |
463 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
464 | printk(KERN_ERR PREFIX "can't evaluate _SEG\n"); | |
6ad95513 BH |
465 | result = -ENODEV; |
466 | goto end; | |
f5eebbe1 | 467 | } |
1da177e4 | 468 | |
f5eebbe1 | 469 | /* Check _CRS first, then _BBN. If no _BBN, default to zero. */ |
6ad95513 BH |
470 | root->secondary.flags = IORESOURCE_BUS; |
471 | status = try_get_root_bridge_busnr(device->handle, &root->secondary); | |
f5eebbe1 | 472 | if (ACPI_FAILURE(status)) { |
6ad95513 BH |
473 | /* |
474 | * We need both the start and end of the downstream bus range | |
475 | * to interpret _CBA (MMCONFIG base address), so it really is | |
476 | * supposed to be in _CRS. If we don't find it there, all we | |
477 | * can do is assume [_BBN-0xFF] or [0-0xFF]. | |
478 | */ | |
479 | root->secondary.end = 0xFF; | |
480 | printk(KERN_WARNING FW_BUG PREFIX | |
481 | "no secondary bus range in _CRS\n"); | |
f5eebbe1 | 482 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, NULL, &bus); |
6ad95513 BH |
483 | if (ACPI_SUCCESS(status)) |
484 | root->secondary.start = bus; | |
485 | else if (status == AE_NOT_FOUND) | |
486 | root->secondary.start = 0; | |
487 | else { | |
488 | printk(KERN_ERR PREFIX "can't evaluate _BBN\n"); | |
489 | result = -ENODEV; | |
490 | goto end; | |
f5eebbe1 BH |
491 | } |
492 | } | |
1da177e4 | 493 | |
f5eebbe1 | 494 | INIT_LIST_HEAD(&root->node); |
32917e5b | 495 | root->device = device; |
0705495d | 496 | root->segment = segment & 0xFFFF; |
1da177e4 LT |
497 | strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); |
498 | strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); | |
db89b4f0 | 499 | device->driver_data = root; |
1da177e4 | 500 | |
990a7ac5 AP |
501 | /* |
502 | * All supported architectures that use ACPI have support for | |
503 | * PCI domains, so we indicate this in _OSC support capabilities. | |
504 | */ | |
0ef5f8f6 | 505 | flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; |
63f10f0f | 506 | acpi_pci_osc_support(root, flags); |
990a7ac5 | 507 | |
1da177e4 LT |
508 | /* |
509 | * TBD: Need PCI interface for enumeration/configuration of roots. | |
510 | */ | |
511 | ||
4be44fcd LB |
512 | /* TBD: Locking */ |
513 | list_add_tail(&root->node, &acpi_pci_roots); | |
1da177e4 | 514 | |
6ad95513 | 515 | printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n", |
4be44fcd | 516 | acpi_device_name(device), acpi_device_bid(device), |
6ad95513 | 517 | root->segment, &root->secondary); |
1da177e4 LT |
518 | |
519 | /* | |
520 | * Scan the Root Bridge | |
521 | * -------------------- | |
522 | * Must do this prior to any attempt to bind the root device, as the | |
523 | * PCI namespace does not get created until this call is made (and | |
524 | * thus the root bridge's pci_dev does not exist). | |
525 | */ | |
57283776 | 526 | root->bus = pci_acpi_scan_root(root); |
1da177e4 | 527 | if (!root->bus) { |
6468463a LB |
528 | printk(KERN_ERR PREFIX |
529 | "Bus %04x:%02x not present in PCI namespace\n", | |
6ad95513 | 530 | root->segment, (unsigned int)root->secondary.start); |
1da177e4 LT |
531 | result = -ENODEV; |
532 | goto end; | |
533 | } | |
534 | ||
535 | /* | |
536 | * Attach ACPI-PCI Context | |
537 | * ----------------------- | |
538 | * Thus binding the ACPI and PCI devices. | |
539 | */ | |
499650de | 540 | result = acpi_pci_bind_root(device); |
1da177e4 LT |
541 | if (result) |
542 | goto end; | |
543 | ||
544 | /* | |
545 | * PCI Routing Table | |
546 | * ----------------- | |
547 | * Evaluate and parse _PRT, if exists. | |
548 | */ | |
2d1e0a02 | 549 | status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); |
1da177e4 | 550 | if (ACPI_SUCCESS(status)) |
859a3f86 | 551 | result = acpi_pci_irq_add_prt(device->handle, root->bus); |
1da177e4 | 552 | |
2786f6e3 RZ |
553 | /* |
554 | * Scan and bind all _ADR-Based Devices | |
555 | */ | |
556 | list_for_each_entry(child, &device->children, node) | |
557 | acpi_pci_bridge_scan(child); | |
558 | ||
0ef5f8f6 AP |
559 | /* Indicate support for various _OSC capabilities. */ |
560 | if (pci_ext_cfg_avail(root->bus->self)) | |
561 | flags |= OSC_EXT_PCI_CONFIG_SUPPORT; | |
3e1b1600 AP |
562 | if (pcie_aspm_enabled()) |
563 | flags |= OSC_ACTIVE_STATE_PWR_SUPPORT | | |
564 | OSC_CLOCK_PWR_CAPABILITY_SUPPORT; | |
07ae95f9 AP |
565 | if (pci_msi_enabled()) |
566 | flags |= OSC_MSI_SUPPORT; | |
0ef5f8f6 | 567 | if (flags != base_flags) |
63f10f0f | 568 | acpi_pci_osc_support(root, flags); |
0ef5f8f6 | 569 | |
b67ea761 RW |
570 | pci_acpi_add_bus_pm_notifier(device, root->bus); |
571 | if (device->wakeup.flags.run_wake) | |
572 | device_set_run_wake(root->bus->bridge, true); | |
573 | ||
f5eebbe1 | 574 | return 0; |
1da177e4 | 575 | |
f5eebbe1 BH |
576 | end: |
577 | if (!list_empty(&root->node)) | |
578 | list_del(&root->node); | |
579 | kfree(root); | |
d550d98d | 580 | return result; |
1da177e4 LT |
581 | } |
582 | ||
4be44fcd | 583 | static int acpi_pci_root_start(struct acpi_device *device) |
c431ada4 | 584 | { |
caf420c6 | 585 | struct acpi_pci_root *root = acpi_driver_data(device); |
c431ada4 | 586 | |
caf420c6 BH |
587 | pci_bus_add_devices(root->bus); |
588 | return 0; | |
c431ada4 | 589 | } |
1da177e4 | 590 | |
4be44fcd | 591 | static int acpi_pci_root_remove(struct acpi_device *device, int type) |
1da177e4 | 592 | { |
caf420c6 | 593 | struct acpi_pci_root *root = acpi_driver_data(device); |
1da177e4 | 594 | |
b67ea761 RW |
595 | device_set_run_wake(root->bus->bridge, false); |
596 | pci_acpi_remove_bus_pm_notifier(device); | |
597 | ||
1da177e4 | 598 | kfree(root); |
d550d98d | 599 | return 0; |
1da177e4 LT |
600 | } |
601 | ||
4be44fcd | 602 | static int __init acpi_pci_root_init(void) |
1da177e4 | 603 | { |
1da177e4 | 604 | if (acpi_pci_disabled) |
d550d98d | 605 | return 0; |
1da177e4 | 606 | |
7bc5e3f2 | 607 | pci_acpi_crs_quirks(); |
1da177e4 | 608 | if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0) |
d550d98d | 609 | return -ENODEV; |
1da177e4 | 610 | |
d550d98d | 611 | return 0; |
1da177e4 LT |
612 | } |
613 | ||
614 | subsys_initcall(acpi_pci_root_init); |