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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> | |
33 | #include <linux/pci.h> | |
990a7ac5 | 34 | #include <linux/pci-acpi.h> |
1da177e4 LT |
35 | #include <linux/acpi.h> |
36 | #include <acpi/acpi_bus.h> | |
37 | #include <acpi/acpi_drivers.h> | |
38 | ||
1da177e4 | 39 | #define _COMPONENT ACPI_PCI_COMPONENT |
f52fd66d | 40 | ACPI_MODULE_NAME("pci_root"); |
1da177e4 | 41 | #define ACPI_PCI_ROOT_CLASS "pci_bridge" |
1da177e4 | 42 | #define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge" |
4be44fcd LB |
43 | static int acpi_pci_root_add(struct acpi_device *device); |
44 | static int acpi_pci_root_remove(struct acpi_device *device, int type); | |
45 | static int acpi_pci_root_start(struct acpi_device *device); | |
1da177e4 | 46 | |
1ba90e3a TR |
47 | static struct acpi_device_id root_device_ids[] = { |
48 | {"PNP0A03", 0}, | |
49 | {"", 0}, | |
50 | }; | |
51 | MODULE_DEVICE_TABLE(acpi, root_device_ids); | |
52 | ||
1da177e4 | 53 | static struct acpi_driver acpi_pci_root_driver = { |
c2b6705b | 54 | .name = "pci_root", |
4be44fcd | 55 | .class = ACPI_PCI_ROOT_CLASS, |
1ba90e3a | 56 | .ids = root_device_ids, |
4be44fcd LB |
57 | .ops = { |
58 | .add = acpi_pci_root_add, | |
59 | .remove = acpi_pci_root_remove, | |
60 | .start = acpi_pci_root_start, | |
61 | }, | |
1da177e4 LT |
62 | }; |
63 | ||
64 | struct acpi_pci_root { | |
4be44fcd | 65 | struct list_head node; |
32917e5b | 66 | struct acpi_device * device; |
4be44fcd LB |
67 | struct acpi_pci_id id; |
68 | struct pci_bus *bus; | |
63f10f0f KK |
69 | |
70 | u32 osc_support_set; /* _OSC state of support bits */ | |
71 | u32 osc_control_set; /* _OSC state of control bits */ | |
72 | u32 osc_control_qry; /* the latest _OSC query result */ | |
73 | ||
74 | u32 osc_queried:1; /* has _OSC control been queried? */ | |
1da177e4 LT |
75 | }; |
76 | ||
77 | static LIST_HEAD(acpi_pci_roots); | |
78 | ||
79 | static struct acpi_pci_driver *sub_driver; | |
63f10f0f | 80 | static DEFINE_MUTEX(osc_lock); |
1da177e4 LT |
81 | |
82 | int acpi_pci_register_driver(struct acpi_pci_driver *driver) | |
83 | { | |
84 | int n = 0; | |
85 | struct list_head *entry; | |
86 | ||
87 | struct acpi_pci_driver **pptr = &sub_driver; | |
88 | while (*pptr) | |
89 | pptr = &(*pptr)->next; | |
90 | *pptr = driver; | |
91 | ||
92 | if (!driver->add) | |
93 | return 0; | |
94 | ||
95 | list_for_each(entry, &acpi_pci_roots) { | |
96 | struct acpi_pci_root *root; | |
97 | root = list_entry(entry, struct acpi_pci_root, node); | |
2d1e0a02 | 98 | driver->add(root->device->handle); |
1da177e4 LT |
99 | n++; |
100 | } | |
101 | ||
102 | return n; | |
103 | } | |
4be44fcd | 104 | |
1da177e4 LT |
105 | EXPORT_SYMBOL(acpi_pci_register_driver); |
106 | ||
107 | void acpi_pci_unregister_driver(struct acpi_pci_driver *driver) | |
108 | { | |
109 | struct list_head *entry; | |
110 | ||
111 | struct acpi_pci_driver **pptr = &sub_driver; | |
112 | while (*pptr) { | |
f10bb254 AM |
113 | if (*pptr == driver) |
114 | break; | |
115 | pptr = &(*pptr)->next; | |
1da177e4 | 116 | } |
f10bb254 AM |
117 | BUG_ON(!*pptr); |
118 | *pptr = (*pptr)->next; | |
1da177e4 LT |
119 | |
120 | if (!driver->remove) | |
121 | return; | |
122 | ||
123 | list_for_each(entry, &acpi_pci_roots) { | |
124 | struct acpi_pci_root *root; | |
125 | root = list_entry(entry, struct acpi_pci_root, node); | |
2d1e0a02 | 126 | driver->remove(root->device->handle); |
1da177e4 LT |
127 | } |
128 | } | |
4be44fcd | 129 | |
1da177e4 LT |
130 | EXPORT_SYMBOL(acpi_pci_unregister_driver); |
131 | ||
d91a0078 JC |
132 | acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus) |
133 | { | |
134 | struct acpi_pci_root *tmp; | |
135 | ||
136 | list_for_each_entry(tmp, &acpi_pci_roots, node) { | |
137 | if ((tmp->id.segment == (u16) seg) && (tmp->id.bus == (u16) bus)) | |
138 | return tmp->device->handle; | |
139 | } | |
140 | return NULL; | |
141 | } | |
142 | ||
143 | EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle); | |
144 | ||
1da177e4 | 145 | static acpi_status |
4be44fcd | 146 | get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) |
1da177e4 | 147 | { |
50dd0969 | 148 | int *busnr = data; |
1da177e4 LT |
149 | struct acpi_resource_address64 address; |
150 | ||
50eca3eb BM |
151 | if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 && |
152 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 && | |
153 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS64) | |
1da177e4 LT |
154 | return AE_OK; |
155 | ||
156 | acpi_resource_to_address64(resource, &address); | |
4be44fcd LB |
157 | if ((address.address_length > 0) && |
158 | (address.resource_type == ACPI_BUS_NUMBER_RANGE)) | |
50eca3eb | 159 | *busnr = address.minimum; |
1da177e4 LT |
160 | |
161 | return AE_OK; | |
162 | } | |
163 | ||
4be44fcd | 164 | static acpi_status try_get_root_bridge_busnr(acpi_handle handle, int *busnum) |
1da177e4 LT |
165 | { |
166 | acpi_status status; | |
167 | ||
168 | *busnum = -1; | |
4be44fcd LB |
169 | status = |
170 | acpi_walk_resources(handle, METHOD_NAME__CRS, | |
171 | get_root_bridge_busnr_callback, busnum); | |
1da177e4 LT |
172 | if (ACPI_FAILURE(status)) |
173 | return status; | |
174 | /* Check if we really get a bus number from _CRS */ | |
175 | if (*busnum == -1) | |
176 | return AE_ERROR; | |
177 | return AE_OK; | |
178 | } | |
179 | ||
2786f6e3 RZ |
180 | static void acpi_pci_bridge_scan(struct acpi_device *device) |
181 | { | |
182 | int status; | |
183 | struct acpi_device *child = NULL; | |
184 | ||
185 | if (device->flags.bus_address) | |
186 | if (device->parent && device->parent->ops.bind) { | |
187 | status = device->parent->ops.bind(device); | |
188 | if (!status) { | |
189 | list_for_each_entry(child, &device->children, node) | |
190 | acpi_pci_bridge_scan(child); | |
191 | } | |
192 | } | |
193 | } | |
194 | ||
63f10f0f KK |
195 | static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, |
196 | 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66}; | |
197 | ||
198 | static acpi_status acpi_pci_run_osc(acpi_handle handle, | |
199 | const u32 *capbuf, u32 *retval) | |
200 | { | |
201 | acpi_status status; | |
202 | struct acpi_object_list input; | |
203 | union acpi_object in_params[4]; | |
204 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; | |
205 | union acpi_object *out_obj; | |
206 | u32 errors; | |
207 | ||
208 | /* Setting up input parameters */ | |
209 | input.count = 4; | |
210 | input.pointer = in_params; | |
211 | in_params[0].type = ACPI_TYPE_BUFFER; | |
212 | in_params[0].buffer.length = 16; | |
213 | in_params[0].buffer.pointer = OSC_UUID; | |
214 | in_params[1].type = ACPI_TYPE_INTEGER; | |
215 | in_params[1].integer.value = 1; | |
216 | in_params[2].type = ACPI_TYPE_INTEGER; | |
217 | in_params[2].integer.value = 3; | |
218 | in_params[3].type = ACPI_TYPE_BUFFER; | |
219 | in_params[3].buffer.length = 12; | |
220 | in_params[3].buffer.pointer = (u8 *)capbuf; | |
221 | ||
222 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); | |
223 | if (ACPI_FAILURE(status)) | |
224 | return status; | |
225 | ||
226 | if (!output.length) | |
227 | return AE_NULL_OBJECT; | |
228 | ||
229 | out_obj = output.pointer; | |
230 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
231 | printk(KERN_DEBUG "_OSC evaluation returned wrong type\n"); | |
232 | status = AE_TYPE; | |
233 | goto out_kfree; | |
234 | } | |
235 | /* Need to ignore the bit0 in result code */ | |
236 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
237 | if (errors) { | |
238 | if (errors & OSC_REQUEST_ERROR) | |
239 | printk(KERN_DEBUG "_OSC request failed\n"); | |
240 | if (errors & OSC_INVALID_UUID_ERROR) | |
241 | printk(KERN_DEBUG "_OSC invalid UUID\n"); | |
242 | if (errors & OSC_INVALID_REVISION_ERROR) | |
243 | printk(KERN_DEBUG "_OSC invalid revision\n"); | |
244 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
245 | if (capbuf[OSC_QUERY_TYPE] & OSC_QUERY_ENABLE) | |
246 | goto out_success; | |
247 | printk(KERN_DEBUG | |
248 | "Firmware did not grant requested _OSC control\n"); | |
249 | status = AE_SUPPORT; | |
250 | goto out_kfree; | |
251 | } | |
252 | status = AE_ERROR; | |
253 | goto out_kfree; | |
254 | } | |
255 | out_success: | |
256 | *retval = *((u32 *)(out_obj->buffer.pointer + 8)); | |
257 | status = AE_OK; | |
258 | ||
259 | out_kfree: | |
260 | kfree(output.pointer); | |
261 | return status; | |
262 | } | |
263 | ||
264 | static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags) | |
265 | { | |
266 | acpi_status status; | |
267 | u32 support_set, result, capbuf[3]; | |
268 | ||
269 | /* do _OSC query for all possible controls */ | |
270 | support_set = root->osc_support_set | (flags & OSC_SUPPORT_MASKS); | |
271 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; | |
272 | capbuf[OSC_SUPPORT_TYPE] = support_set; | |
273 | capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS; | |
274 | ||
275 | status = acpi_pci_run_osc(root->device->handle, capbuf, &result); | |
276 | if (ACPI_SUCCESS(status)) { | |
277 | root->osc_support_set = support_set; | |
278 | root->osc_control_qry = result; | |
279 | root->osc_queried = 1; | |
280 | } | |
281 | return status; | |
282 | } | |
283 | ||
284 | static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) | |
285 | { | |
286 | acpi_status status; | |
287 | acpi_handle tmp; | |
288 | ||
289 | status = acpi_get_handle(root->device->handle, "_OSC", &tmp); | |
290 | if (ACPI_FAILURE(status)) | |
291 | return status; | |
292 | mutex_lock(&osc_lock); | |
293 | status = acpi_pci_query_osc(root, flags); | |
294 | mutex_unlock(&osc_lock); | |
295 | return status; | |
296 | } | |
297 | ||
298 | static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) | |
299 | { | |
300 | struct acpi_pci_root *root; | |
301 | list_for_each_entry(root, &acpi_pci_roots, node) { | |
302 | if (root->device->handle == handle) | |
303 | return root; | |
304 | } | |
305 | return NULL; | |
306 | } | |
307 | ||
308 | /** | |
9f5404d8 | 309 | * acpi_pci_osc_control_set - commit requested control to Firmware |
63f10f0f KK |
310 | * @handle: acpi_handle for the target ACPI object |
311 | * @flags: driver's requested control bits | |
312 | * | |
313 | * Attempt to take control from Firmware on requested control bits. | |
314 | **/ | |
9f5404d8 | 315 | acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags) |
63f10f0f KK |
316 | { |
317 | acpi_status status; | |
318 | u32 control_req, result, capbuf[3]; | |
319 | acpi_handle tmp; | |
320 | struct acpi_pci_root *root; | |
321 | ||
322 | status = acpi_get_handle(handle, "_OSC", &tmp); | |
323 | if (ACPI_FAILURE(status)) | |
324 | return status; | |
325 | ||
326 | control_req = (flags & OSC_CONTROL_MASKS); | |
327 | if (!control_req) | |
328 | return AE_TYPE; | |
329 | ||
330 | root = acpi_pci_find_root(handle); | |
331 | if (!root) | |
332 | return AE_NOT_EXIST; | |
333 | ||
334 | mutex_lock(&osc_lock); | |
335 | /* No need to evaluate _OSC if the control was already granted. */ | |
336 | if ((root->osc_control_set & control_req) == control_req) | |
337 | goto out; | |
338 | ||
339 | /* Need to query controls first before requesting them */ | |
340 | if (!root->osc_queried) { | |
341 | status = acpi_pci_query_osc(root, root->osc_support_set); | |
342 | if (ACPI_FAILURE(status)) | |
343 | goto out; | |
344 | } | |
345 | if ((root->osc_control_qry & control_req) != control_req) { | |
346 | printk(KERN_DEBUG | |
347 | "Firmware did not grant requested _OSC control\n"); | |
348 | status = AE_SUPPORT; | |
349 | goto out; | |
350 | } | |
351 | ||
352 | capbuf[OSC_QUERY_TYPE] = 0; | |
353 | capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set; | |
354 | capbuf[OSC_CONTROL_TYPE] = root->osc_control_set | control_req; | |
355 | status = acpi_pci_run_osc(handle, capbuf, &result); | |
356 | if (ACPI_SUCCESS(status)) | |
357 | root->osc_control_set = result; | |
358 | out: | |
359 | mutex_unlock(&osc_lock); | |
360 | return status; | |
361 | } | |
9f5404d8 | 362 | EXPORT_SYMBOL(acpi_pci_osc_control_set); |
63f10f0f | 363 | |
b5678a34 | 364 | static int __devinit acpi_pci_root_add(struct acpi_device *device) |
1da177e4 | 365 | { |
4be44fcd LB |
366 | int result = 0; |
367 | struct acpi_pci_root *root = NULL; | |
368 | struct acpi_pci_root *tmp; | |
369 | acpi_status status = AE_OK; | |
27663c58 | 370 | unsigned long long value = 0; |
4be44fcd | 371 | acpi_handle handle = NULL; |
2786f6e3 | 372 | struct acpi_device *child; |
0ef5f8f6 | 373 | u32 flags, base_flags; |
1da177e4 | 374 | |
1da177e4 LT |
375 | |
376 | if (!device) | |
d550d98d | 377 | return -EINVAL; |
1da177e4 | 378 | |
36bcbec7 | 379 | root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); |
1da177e4 | 380 | if (!root) |
d550d98d | 381 | return -ENOMEM; |
c431ada4 | 382 | INIT_LIST_HEAD(&root->node); |
1da177e4 | 383 | |
32917e5b | 384 | root->device = device; |
1da177e4 LT |
385 | strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); |
386 | strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); | |
db89b4f0 | 387 | device->driver_data = root; |
1da177e4 | 388 | |
1da177e4 LT |
389 | device->ops.bind = acpi_pci_bind; |
390 | ||
990a7ac5 AP |
391 | /* |
392 | * All supported architectures that use ACPI have support for | |
393 | * PCI domains, so we indicate this in _OSC support capabilities. | |
394 | */ | |
0ef5f8f6 | 395 | flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; |
63f10f0f | 396 | acpi_pci_osc_support(root, flags); |
990a7ac5 | 397 | |
1da177e4 LT |
398 | /* |
399 | * Segment | |
400 | * ------- | |
401 | * Obtained via _SEG, if exists, otherwise assumed to be zero (0). | |
402 | */ | |
2d1e0a02 | 403 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL, |
4be44fcd | 404 | &value); |
1da177e4 LT |
405 | switch (status) { |
406 | case AE_OK: | |
407 | root->id.segment = (u16) value; | |
408 | break; | |
409 | case AE_NOT_FOUND: | |
4be44fcd LB |
410 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
411 | "Assuming segment 0 (no _SEG)\n")); | |
1da177e4 LT |
412 | root->id.segment = 0; |
413 | break; | |
414 | default: | |
a6fc6720 | 415 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _SEG")); |
1da177e4 LT |
416 | result = -ENODEV; |
417 | goto end; | |
418 | } | |
419 | ||
420 | /* | |
421 | * Bus | |
422 | * --- | |
423 | * Obtained via _BBN, if exists, otherwise assumed to be zero (0). | |
424 | */ | |
2d1e0a02 | 425 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, NULL, |
4be44fcd | 426 | &value); |
1da177e4 LT |
427 | switch (status) { |
428 | case AE_OK: | |
429 | root->id.bus = (u16) value; | |
430 | break; | |
431 | case AE_NOT_FOUND: | |
432 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Assuming bus 0 (no _BBN)\n")); | |
433 | root->id.bus = 0; | |
434 | break; | |
435 | default: | |
a6fc6720 | 436 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BBN")); |
1da177e4 LT |
437 | result = -ENODEV; |
438 | goto end; | |
439 | } | |
440 | ||
441 | /* Some systems have wrong _BBN */ | |
442 | list_for_each_entry(tmp, &acpi_pci_roots, node) { | |
443 | if ((tmp->id.segment == root->id.segment) | |
4be44fcd | 444 | && (tmp->id.bus == root->id.bus)) { |
1da177e4 LT |
445 | int bus = 0; |
446 | acpi_status status; | |
447 | ||
6468463a | 448 | printk(KERN_ERR PREFIX |
a6fc6720 | 449 | "Wrong _BBN value, reboot" |
6468463a | 450 | " and use option 'pci=noacpi'\n"); |
1da177e4 | 451 | |
2d1e0a02 | 452 | status = try_get_root_bridge_busnr(device->handle, &bus); |
1da177e4 LT |
453 | if (ACPI_FAILURE(status)) |
454 | break; | |
455 | if (bus != root->id.bus) { | |
4be44fcd LB |
456 | printk(KERN_INFO PREFIX |
457 | "PCI _CRS %d overrides _BBN 0\n", bus); | |
1da177e4 LT |
458 | root->id.bus = bus; |
459 | } | |
460 | break; | |
461 | } | |
462 | } | |
463 | /* | |
464 | * Device & Function | |
465 | * ----------------- | |
466 | * Obtained from _ADR (which has already been evaluated for us). | |
467 | */ | |
468 | root->id.device = device->pnp.bus_address >> 16; | |
469 | root->id.function = device->pnp.bus_address & 0xFFFF; | |
470 | ||
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), | |
480 | root->id.segment, root->id.bus); | |
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 | */ | |
489 | root->bus = pci_acpi_scan_root(device, root->id.segment, root->id.bus); | |
490 | if (!root->bus) { | |
6468463a LB |
491 | printk(KERN_ERR PREFIX |
492 | "Bus %04x:%02x not present in PCI namespace\n", | |
493 | root->id.segment, root->id.bus); | |
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 | */ | |
503 | result = acpi_pci_bind_root(device, &root->id, root->bus); | |
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)) |
2d1e0a02 | 514 | result = acpi_pci_irq_add_prt(device->handle, root->id.segment, |
4be44fcd | 515 | root->id.bus); |
1da177e4 | 516 | |
2786f6e3 RZ |
517 | /* |
518 | * Scan and bind all _ADR-Based Devices | |
519 | */ | |
520 | list_for_each_entry(child, &device->children, node) | |
521 | acpi_pci_bridge_scan(child); | |
522 | ||
0ef5f8f6 AP |
523 | /* Indicate support for various _OSC capabilities. */ |
524 | if (pci_ext_cfg_avail(root->bus->self)) | |
525 | flags |= OSC_EXT_PCI_CONFIG_SUPPORT; | |
3e1b1600 AP |
526 | if (pcie_aspm_enabled()) |
527 | flags |= OSC_ACTIVE_STATE_PWR_SUPPORT | | |
528 | OSC_CLOCK_PWR_CAPABILITY_SUPPORT; | |
07ae95f9 AP |
529 | if (pci_msi_enabled()) |
530 | flags |= OSC_MSI_SUPPORT; | |
0ef5f8f6 | 531 | if (flags != base_flags) |
63f10f0f | 532 | acpi_pci_osc_support(root, flags); |
0ef5f8f6 | 533 | |
4be44fcd | 534 | end: |
c431ada4 RS |
535 | if (result) { |
536 | if (!list_empty(&root->node)) | |
537 | list_del(&root->node); | |
1da177e4 | 538 | kfree(root); |
c431ada4 | 539 | } |
1da177e4 | 540 | |
d550d98d | 541 | return result; |
1da177e4 LT |
542 | } |
543 | ||
4be44fcd | 544 | static int acpi_pci_root_start(struct acpi_device *device) |
c431ada4 | 545 | { |
4be44fcd | 546 | struct acpi_pci_root *root; |
c431ada4 | 547 | |
c431ada4 RS |
548 | |
549 | list_for_each_entry(root, &acpi_pci_roots, node) { | |
432bfaba | 550 | if (root->device == device) { |
c431ada4 | 551 | pci_bus_add_devices(root->bus); |
d550d98d | 552 | return 0; |
c431ada4 RS |
553 | } |
554 | } | |
d550d98d | 555 | return -ENODEV; |
c431ada4 | 556 | } |
1da177e4 | 557 | |
4be44fcd | 558 | static int acpi_pci_root_remove(struct acpi_device *device, int type) |
1da177e4 | 559 | { |
4be44fcd | 560 | struct acpi_pci_root *root = NULL; |
1da177e4 | 561 | |
1da177e4 LT |
562 | |
563 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 564 | return -EINVAL; |
1da177e4 | 565 | |
50dd0969 | 566 | root = acpi_driver_data(device); |
1da177e4 LT |
567 | |
568 | kfree(root); | |
569 | ||
d550d98d | 570 | return 0; |
1da177e4 LT |
571 | } |
572 | ||
4be44fcd | 573 | static int __init acpi_pci_root_init(void) |
1da177e4 | 574 | { |
1da177e4 | 575 | if (acpi_pci_disabled) |
d550d98d | 576 | return 0; |
1da177e4 | 577 | |
1da177e4 | 578 | if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0) |
d550d98d | 579 | return -ENODEV; |
1da177e4 | 580 | |
d550d98d | 581 | return 0; |
1da177e4 LT |
582 | } |
583 | ||
584 | subsys_initcall(acpi_pci_root_init); |