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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> | |
1da177e4 LT |
30 | #include <linux/spinlock.h> |
31 | #include <linux/pm.h> | |
b67ea761 | 32 | #include <linux/pm_runtime.h> |
1da177e4 | 33 | #include <linux/pci.h> |
990a7ac5 | 34 | #include <linux/pci-acpi.h> |
1da177e4 | 35 | #include <linux/acpi.h> |
5a0e3ad6 | 36 | #include <linux/slab.h> |
1da177e4 LT |
37 | #include <acpi/acpi_bus.h> |
38 | #include <acpi/acpi_drivers.h> | |
415e12b2 | 39 | #include <acpi/apei.h> |
1da177e4 | 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 | |
415e12b2 RW |
51 | #define ACPI_PCIE_REQ_SUPPORT (OSC_EXT_PCI_CONFIG_SUPPORT \ |
52 | | OSC_ACTIVE_STATE_PWR_SUPPORT \ | |
53 | | OSC_CLOCK_PWR_CAPABILITY_SUPPORT \ | |
54 | | OSC_MSI_SUPPORT) | |
55 | ||
c97adf9e | 56 | static const struct acpi_device_id root_device_ids[] = { |
1ba90e3a TR |
57 | {"PNP0A03", 0}, |
58 | {"", 0}, | |
59 | }; | |
60 | MODULE_DEVICE_TABLE(acpi, root_device_ids); | |
61 | ||
1da177e4 | 62 | static struct acpi_driver acpi_pci_root_driver = { |
c2b6705b | 63 | .name = "pci_root", |
4be44fcd | 64 | .class = ACPI_PCI_ROOT_CLASS, |
1ba90e3a | 65 | .ids = root_device_ids, |
4be44fcd LB |
66 | .ops = { |
67 | .add = acpi_pci_root_add, | |
68 | .remove = acpi_pci_root_remove, | |
69 | .start = acpi_pci_root_start, | |
70 | }, | |
1da177e4 LT |
71 | }; |
72 | ||
1da177e4 LT |
73 | static LIST_HEAD(acpi_pci_roots); |
74 | ||
75 | static struct acpi_pci_driver *sub_driver; | |
63f10f0f | 76 | static DEFINE_MUTEX(osc_lock); |
1da177e4 LT |
77 | |
78 | int acpi_pci_register_driver(struct acpi_pci_driver *driver) | |
79 | { | |
80 | int n = 0; | |
c1aec834 | 81 | struct acpi_pci_root *root; |
1da177e4 LT |
82 | |
83 | struct acpi_pci_driver **pptr = &sub_driver; | |
84 | while (*pptr) | |
85 | pptr = &(*pptr)->next; | |
86 | *pptr = driver; | |
87 | ||
88 | if (!driver->add) | |
89 | return 0; | |
90 | ||
c1aec834 | 91 | list_for_each_entry(root, &acpi_pci_roots, node) { |
2d1e0a02 | 92 | driver->add(root->device->handle); |
1da177e4 LT |
93 | n++; |
94 | } | |
95 | ||
96 | return n; | |
97 | } | |
4be44fcd | 98 | |
1da177e4 LT |
99 | EXPORT_SYMBOL(acpi_pci_register_driver); |
100 | ||
101 | void acpi_pci_unregister_driver(struct acpi_pci_driver *driver) | |
102 | { | |
c1aec834 | 103 | struct acpi_pci_root *root; |
1da177e4 LT |
104 | |
105 | struct acpi_pci_driver **pptr = &sub_driver; | |
106 | while (*pptr) { | |
f10bb254 AM |
107 | if (*pptr == driver) |
108 | break; | |
109 | pptr = &(*pptr)->next; | |
1da177e4 | 110 | } |
f10bb254 AM |
111 | BUG_ON(!*pptr); |
112 | *pptr = (*pptr)->next; | |
1da177e4 LT |
113 | |
114 | if (!driver->remove) | |
115 | return; | |
116 | ||
c1aec834 | 117 | list_for_each_entry(root, &acpi_pci_roots, node) |
2d1e0a02 | 118 | driver->remove(root->device->handle); |
1da177e4 | 119 | } |
4be44fcd | 120 | |
1da177e4 LT |
121 | EXPORT_SYMBOL(acpi_pci_unregister_driver); |
122 | ||
d91a0078 JC |
123 | acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus) |
124 | { | |
c1aec834 | 125 | struct acpi_pci_root *root; |
d91a0078 | 126 | |
c1aec834 | 127 | list_for_each_entry(root, &acpi_pci_roots, node) |
6ad95513 BH |
128 | if ((root->segment == (u16) seg) && |
129 | (root->secondary.start == (u16) bus)) | |
c1aec834 | 130 | return root->device->handle; |
d91a0078 JC |
131 | return NULL; |
132 | } | |
133 | ||
134 | EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle); | |
135 | ||
27558203 AC |
136 | /** |
137 | * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge | |
138 | * @handle - the ACPI CA node in question. | |
139 | * | |
140 | * Note: we could make this API take a struct acpi_device * instead, but | |
141 | * for now, it's more convenient to operate on an acpi_handle. | |
142 | */ | |
143 | int acpi_is_root_bridge(acpi_handle handle) | |
144 | { | |
145 | int ret; | |
146 | struct acpi_device *device; | |
147 | ||
148 | ret = acpi_bus_get_device(handle, &device); | |
149 | if (ret) | |
150 | return 0; | |
151 | ||
152 | ret = acpi_match_device_ids(device, root_device_ids); | |
153 | if (ret) | |
154 | return 0; | |
155 | else | |
156 | return 1; | |
157 | } | |
158 | EXPORT_SYMBOL_GPL(acpi_is_root_bridge); | |
159 | ||
1da177e4 | 160 | static acpi_status |
4be44fcd | 161 | get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) |
1da177e4 | 162 | { |
6ad95513 | 163 | struct resource *res = data; |
1da177e4 LT |
164 | struct acpi_resource_address64 address; |
165 | ||
50eca3eb BM |
166 | if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 && |
167 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 && | |
168 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS64) | |
1da177e4 LT |
169 | return AE_OK; |
170 | ||
171 | acpi_resource_to_address64(resource, &address); | |
4be44fcd | 172 | if ((address.address_length > 0) && |
6ad95513 BH |
173 | (address.resource_type == ACPI_BUS_NUMBER_RANGE)) { |
174 | res->start = address.minimum; | |
175 | res->end = address.minimum + address.address_length - 1; | |
176 | } | |
1da177e4 LT |
177 | |
178 | return AE_OK; | |
179 | } | |
180 | ||
f5eebbe1 | 181 | static acpi_status try_get_root_bridge_busnr(acpi_handle handle, |
6ad95513 | 182 | struct resource *res) |
1da177e4 LT |
183 | { |
184 | acpi_status status; | |
185 | ||
6ad95513 | 186 | res->start = -1; |
4be44fcd LB |
187 | status = |
188 | acpi_walk_resources(handle, METHOD_NAME__CRS, | |
6ad95513 | 189 | get_root_bridge_busnr_callback, res); |
1da177e4 LT |
190 | if (ACPI_FAILURE(status)) |
191 | return status; | |
6ad95513 | 192 | if (res->start == -1) |
1da177e4 LT |
193 | return AE_ERROR; |
194 | return AE_OK; | |
195 | } | |
196 | ||
2786f6e3 RZ |
197 | static void acpi_pci_bridge_scan(struct acpi_device *device) |
198 | { | |
199 | int status; | |
200 | struct acpi_device *child = NULL; | |
201 | ||
202 | if (device->flags.bus_address) | |
203 | if (device->parent && device->parent->ops.bind) { | |
204 | status = device->parent->ops.bind(device); | |
205 | if (!status) { | |
206 | list_for_each_entry(child, &device->children, node) | |
207 | acpi_pci_bridge_scan(child); | |
208 | } | |
209 | } | |
210 | } | |
211 | ||
3a9622dc | 212 | static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; |
63f10f0f KK |
213 | |
214 | static acpi_status acpi_pci_run_osc(acpi_handle handle, | |
215 | const u32 *capbuf, u32 *retval) | |
216 | { | |
3a9622dc SL |
217 | struct acpi_osc_context context = { |
218 | .uuid_str = pci_osc_uuid_str, | |
219 | .rev = 1, | |
220 | .cap.length = 12, | |
221 | .cap.pointer = (void *)capbuf, | |
222 | }; | |
63f10f0f | 223 | acpi_status status; |
63f10f0f | 224 | |
3a9622dc SL |
225 | status = acpi_run_osc(handle, &context); |
226 | if (ACPI_SUCCESS(status)) { | |
227 | *retval = *((u32 *)(context.ret.pointer + 8)); | |
228 | kfree(context.ret.pointer); | |
63f10f0f | 229 | } |
63f10f0f KK |
230 | return status; |
231 | } | |
232 | ||
ab8e8957 RW |
233 | static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, |
234 | u32 support, | |
235 | u32 *control) | |
63f10f0f KK |
236 | { |
237 | acpi_status status; | |
ab8e8957 RW |
238 | u32 result, capbuf[3]; |
239 | ||
240 | support &= OSC_PCI_SUPPORT_MASKS; | |
241 | support |= root->osc_support_set; | |
63f10f0f | 242 | |
63f10f0f | 243 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; |
ab8e8957 RW |
244 | capbuf[OSC_SUPPORT_TYPE] = support; |
245 | if (control) { | |
246 | *control &= OSC_PCI_CONTROL_MASKS; | |
247 | capbuf[OSC_CONTROL_TYPE] = *control | root->osc_control_set; | |
248 | } else { | |
249 | /* Run _OSC query for all possible controls. */ | |
250 | capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS; | |
251 | } | |
63f10f0f KK |
252 | |
253 | status = acpi_pci_run_osc(root->device->handle, capbuf, &result); | |
254 | if (ACPI_SUCCESS(status)) { | |
ab8e8957 | 255 | root->osc_support_set = support; |
2b8fd918 | 256 | if (control) |
ab8e8957 | 257 | *control = result; |
63f10f0f KK |
258 | } |
259 | return status; | |
260 | } | |
261 | ||
262 | static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) | |
263 | { | |
264 | acpi_status status; | |
265 | acpi_handle tmp; | |
266 | ||
267 | status = acpi_get_handle(root->device->handle, "_OSC", &tmp); | |
268 | if (ACPI_FAILURE(status)) | |
269 | return status; | |
270 | mutex_lock(&osc_lock); | |
ab8e8957 | 271 | status = acpi_pci_query_osc(root, flags, NULL); |
63f10f0f KK |
272 | mutex_unlock(&osc_lock); |
273 | return status; | |
274 | } | |
275 | ||
76d56de5 | 276 | struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) |
63f10f0f KK |
277 | { |
278 | struct acpi_pci_root *root; | |
c1aec834 | 279 | |
63f10f0f KK |
280 | list_for_each_entry(root, &acpi_pci_roots, node) { |
281 | if (root->device->handle == handle) | |
282 | return root; | |
283 | } | |
284 | return NULL; | |
285 | } | |
76d56de5 | 286 | EXPORT_SYMBOL_GPL(acpi_pci_find_root); |
63f10f0f | 287 | |
2f7bbceb AC |
288 | struct acpi_handle_node { |
289 | struct list_head node; | |
290 | acpi_handle handle; | |
291 | }; | |
292 | ||
293 | /** | |
294 | * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev | |
295 | * @handle: the handle in question | |
296 | * | |
297 | * Given an ACPI CA handle, the desired PCI device is located in the | |
298 | * list of PCI devices. | |
299 | * | |
300 | * If the device is found, its reference count is increased and this | |
301 | * function returns a pointer to its data structure. The caller must | |
302 | * decrement the reference count by calling pci_dev_put(). | |
303 | * If no device is found, %NULL is returned. | |
304 | */ | |
305 | struct pci_dev *acpi_get_pci_dev(acpi_handle handle) | |
306 | { | |
307 | int dev, fn; | |
308 | unsigned long long adr; | |
309 | acpi_status status; | |
310 | acpi_handle phandle; | |
311 | struct pci_bus *pbus; | |
312 | struct pci_dev *pdev = NULL; | |
313 | struct acpi_handle_node *node, *tmp; | |
314 | struct acpi_pci_root *root; | |
315 | LIST_HEAD(device_list); | |
316 | ||
317 | /* | |
318 | * Walk up the ACPI CA namespace until we reach a PCI root bridge. | |
319 | */ | |
320 | phandle = handle; | |
321 | while (!acpi_is_root_bridge(phandle)) { | |
322 | node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); | |
323 | if (!node) | |
324 | goto out; | |
325 | ||
326 | INIT_LIST_HEAD(&node->node); | |
327 | node->handle = phandle; | |
328 | list_add(&node->node, &device_list); | |
329 | ||
330 | status = acpi_get_parent(phandle, &phandle); | |
331 | if (ACPI_FAILURE(status)) | |
332 | goto out; | |
333 | } | |
334 | ||
335 | root = acpi_pci_find_root(phandle); | |
336 | if (!root) | |
337 | goto out; | |
338 | ||
339 | pbus = root->bus; | |
340 | ||
341 | /* | |
342 | * Now, walk back down the PCI device tree until we return to our | |
343 | * original handle. Assumes that everything between the PCI root | |
344 | * bridge and the device we're looking for must be a P2P bridge. | |
345 | */ | |
346 | list_for_each_entry(node, &device_list, node) { | |
347 | acpi_handle hnd = node->handle; | |
348 | status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); | |
349 | if (ACPI_FAILURE(status)) | |
350 | goto out; | |
351 | dev = (adr >> 16) & 0xffff; | |
352 | fn = adr & 0xffff; | |
353 | ||
354 | pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); | |
412af978 | 355 | if (!pdev || hnd == handle) |
2f7bbceb AC |
356 | break; |
357 | ||
358 | pbus = pdev->subordinate; | |
359 | pci_dev_put(pdev); | |
497fb54f RW |
360 | |
361 | /* | |
362 | * This function may be called for a non-PCI device that has a | |
363 | * PCI parent (eg. a disk under a PCI SATA controller). In that | |
364 | * case pdev->subordinate will be NULL for the parent. | |
365 | */ | |
366 | if (!pbus) { | |
367 | dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n"); | |
368 | pdev = NULL; | |
369 | break; | |
370 | } | |
2f7bbceb AC |
371 | } |
372 | out: | |
373 | list_for_each_entry_safe(node, tmp, &device_list, node) | |
374 | kfree(node); | |
375 | ||
376 | return pdev; | |
377 | } | |
378 | EXPORT_SYMBOL_GPL(acpi_get_pci_dev); | |
379 | ||
63f10f0f | 380 | /** |
75fb60f2 RW |
381 | * acpi_pci_osc_control_set - Request control of PCI root _OSC features. |
382 | * @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex). | |
383 | * @mask: Mask of _OSC bits to request control of, place to store control mask. | |
384 | * @req: Mask of _OSC bits the control of is essential to the caller. | |
63f10f0f | 385 | * |
75fb60f2 RW |
386 | * Run _OSC query for @mask and if that is successful, compare the returned |
387 | * mask of control bits with @req. If all of the @req bits are set in the | |
388 | * returned mask, run _OSC request for it. | |
389 | * | |
390 | * The variable at the @mask address may be modified regardless of whether or | |
391 | * not the function returns success. On success it will contain the mask of | |
392 | * _OSC bits the BIOS has granted control of, but its contents are meaningless | |
393 | * on failure. | |
63f10f0f | 394 | **/ |
75fb60f2 | 395 | acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req) |
63f10f0f | 396 | { |
75fb60f2 | 397 | struct acpi_pci_root *root; |
63f10f0f | 398 | acpi_status status; |
75fb60f2 | 399 | u32 ctrl, capbuf[3]; |
63f10f0f | 400 | acpi_handle tmp; |
63f10f0f | 401 | |
75fb60f2 RW |
402 | if (!mask) |
403 | return AE_BAD_PARAMETER; | |
404 | ||
405 | ctrl = *mask & OSC_PCI_CONTROL_MASKS; | |
406 | if ((ctrl & req) != req) | |
63f10f0f KK |
407 | return AE_TYPE; |
408 | ||
409 | root = acpi_pci_find_root(handle); | |
410 | if (!root) | |
411 | return AE_NOT_EXIST; | |
412 | ||
b879dc4b RW |
413 | status = acpi_get_handle(handle, "_OSC", &tmp); |
414 | if (ACPI_FAILURE(status)) | |
415 | return status; | |
416 | ||
63f10f0f | 417 | mutex_lock(&osc_lock); |
75fb60f2 RW |
418 | |
419 | *mask = ctrl | root->osc_control_set; | |
63f10f0f | 420 | /* No need to evaluate _OSC if the control was already granted. */ |
75fb60f2 | 421 | if ((root->osc_control_set & ctrl) == ctrl) |
63f10f0f KK |
422 | goto out; |
423 | ||
75fb60f2 RW |
424 | /* Need to check the available controls bits before requesting them. */ |
425 | while (*mask) { | |
426 | status = acpi_pci_query_osc(root, root->osc_support_set, mask); | |
427 | if (ACPI_FAILURE(status)) | |
428 | goto out; | |
429 | if (ctrl == *mask) | |
430 | break; | |
431 | ctrl = *mask; | |
432 | } | |
2b8fd918 | 433 | |
75fb60f2 | 434 | if ((ctrl & req) != req) { |
63f10f0f KK |
435 | status = AE_SUPPORT; |
436 | goto out; | |
437 | } | |
438 | ||
439 | capbuf[OSC_QUERY_TYPE] = 0; | |
440 | capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set; | |
75fb60f2 RW |
441 | capbuf[OSC_CONTROL_TYPE] = ctrl; |
442 | status = acpi_pci_run_osc(handle, capbuf, mask); | |
63f10f0f | 443 | if (ACPI_SUCCESS(status)) |
75fb60f2 | 444 | root->osc_control_set = *mask; |
63f10f0f KK |
445 | out: |
446 | mutex_unlock(&osc_lock); | |
447 | return status; | |
448 | } | |
9f5404d8 | 449 | EXPORT_SYMBOL(acpi_pci_osc_control_set); |
63f10f0f | 450 | |
b5678a34 | 451 | static int __devinit acpi_pci_root_add(struct acpi_device *device) |
1da177e4 | 452 | { |
f5eebbe1 BH |
453 | unsigned long long segment, bus; |
454 | acpi_status status; | |
455 | int result; | |
456 | struct acpi_pci_root *root; | |
457 | acpi_handle handle; | |
2786f6e3 | 458 | struct acpi_device *child; |
0ef5f8f6 | 459 | u32 flags, base_flags; |
1da177e4 | 460 | |
6ad95513 BH |
461 | root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); |
462 | if (!root) | |
463 | return -ENOMEM; | |
464 | ||
f5eebbe1 BH |
465 | segment = 0; |
466 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL, | |
467 | &segment); | |
468 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
469 | printk(KERN_ERR PREFIX "can't evaluate _SEG\n"); | |
6ad95513 BH |
470 | result = -ENODEV; |
471 | goto end; | |
f5eebbe1 | 472 | } |
1da177e4 | 473 | |
f5eebbe1 | 474 | /* Check _CRS first, then _BBN. If no _BBN, default to zero. */ |
6ad95513 BH |
475 | root->secondary.flags = IORESOURCE_BUS; |
476 | status = try_get_root_bridge_busnr(device->handle, &root->secondary); | |
f5eebbe1 | 477 | if (ACPI_FAILURE(status)) { |
6ad95513 BH |
478 | /* |
479 | * We need both the start and end of the downstream bus range | |
480 | * to interpret _CBA (MMCONFIG base address), so it really is | |
481 | * supposed to be in _CRS. If we don't find it there, all we | |
482 | * can do is assume [_BBN-0xFF] or [0-0xFF]. | |
483 | */ | |
484 | root->secondary.end = 0xFF; | |
485 | printk(KERN_WARNING FW_BUG PREFIX | |
486 | "no secondary bus range in _CRS\n"); | |
f5eebbe1 | 487 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, NULL, &bus); |
6ad95513 BH |
488 | if (ACPI_SUCCESS(status)) |
489 | root->secondary.start = bus; | |
490 | else if (status == AE_NOT_FOUND) | |
491 | root->secondary.start = 0; | |
492 | else { | |
493 | printk(KERN_ERR PREFIX "can't evaluate _BBN\n"); | |
494 | result = -ENODEV; | |
495 | goto end; | |
f5eebbe1 BH |
496 | } |
497 | } | |
1da177e4 | 498 | |
f5eebbe1 | 499 | INIT_LIST_HEAD(&root->node); |
32917e5b | 500 | root->device = device; |
0705495d | 501 | root->segment = segment & 0xFFFF; |
1da177e4 LT |
502 | strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); |
503 | strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); | |
db89b4f0 | 504 | device->driver_data = root; |
1da177e4 | 505 | |
990a7ac5 AP |
506 | /* |
507 | * All supported architectures that use ACPI have support for | |
508 | * PCI domains, so we indicate this in _OSC support capabilities. | |
509 | */ | |
0ef5f8f6 | 510 | flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; |
63f10f0f | 511 | acpi_pci_osc_support(root, flags); |
990a7ac5 | 512 | |
1da177e4 LT |
513 | /* |
514 | * TBD: Need PCI interface for enumeration/configuration of roots. | |
515 | */ | |
516 | ||
4be44fcd LB |
517 | /* TBD: Locking */ |
518 | list_add_tail(&root->node, &acpi_pci_roots); | |
1da177e4 | 519 | |
6ad95513 | 520 | printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n", |
4be44fcd | 521 | acpi_device_name(device), acpi_device_bid(device), |
6ad95513 | 522 | root->segment, &root->secondary); |
1da177e4 LT |
523 | |
524 | /* | |
525 | * Scan the Root Bridge | |
526 | * -------------------- | |
527 | * Must do this prior to any attempt to bind the root device, as the | |
528 | * PCI namespace does not get created until this call is made (and | |
529 | * thus the root bridge's pci_dev does not exist). | |
530 | */ | |
57283776 | 531 | root->bus = pci_acpi_scan_root(root); |
1da177e4 | 532 | if (!root->bus) { |
6468463a LB |
533 | printk(KERN_ERR PREFIX |
534 | "Bus %04x:%02x not present in PCI namespace\n", | |
6ad95513 | 535 | root->segment, (unsigned int)root->secondary.start); |
1da177e4 LT |
536 | result = -ENODEV; |
537 | goto end; | |
538 | } | |
539 | ||
540 | /* | |
541 | * Attach ACPI-PCI Context | |
542 | * ----------------------- | |
543 | * Thus binding the ACPI and PCI devices. | |
544 | */ | |
499650de | 545 | result = acpi_pci_bind_root(device); |
1da177e4 LT |
546 | if (result) |
547 | goto end; | |
548 | ||
549 | /* | |
550 | * PCI Routing Table | |
551 | * ----------------- | |
552 | * Evaluate and parse _PRT, if exists. | |
553 | */ | |
2d1e0a02 | 554 | status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); |
1da177e4 | 555 | if (ACPI_SUCCESS(status)) |
859a3f86 | 556 | result = acpi_pci_irq_add_prt(device->handle, root->bus); |
1da177e4 | 557 | |
2786f6e3 RZ |
558 | /* |
559 | * Scan and bind all _ADR-Based Devices | |
560 | */ | |
561 | list_for_each_entry(child, &device->children, node) | |
562 | acpi_pci_bridge_scan(child); | |
563 | ||
0ef5f8f6 AP |
564 | /* Indicate support for various _OSC capabilities. */ |
565 | if (pci_ext_cfg_avail(root->bus->self)) | |
566 | flags |= OSC_EXT_PCI_CONFIG_SUPPORT; | |
3e1b1600 AP |
567 | if (pcie_aspm_enabled()) |
568 | flags |= OSC_ACTIVE_STATE_PWR_SUPPORT | | |
569 | OSC_CLOCK_PWR_CAPABILITY_SUPPORT; | |
07ae95f9 AP |
570 | if (pci_msi_enabled()) |
571 | flags |= OSC_MSI_SUPPORT; | |
0ef5f8f6 | 572 | if (flags != base_flags) |
63f10f0f | 573 | acpi_pci_osc_support(root, flags); |
0ef5f8f6 | 574 | |
415e12b2 RW |
575 | if (!pcie_ports_disabled |
576 | && (flags & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) { | |
577 | flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL | |
578 | | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | |
579 | | OSC_PCI_EXPRESS_PME_CONTROL; | |
580 | ||
581 | if (pci_aer_available()) { | |
582 | if (aer_acpi_firmware_first()) | |
583 | dev_dbg(root->bus->bridge, | |
584 | "PCIe errors handled by BIOS.\n"); | |
585 | else | |
586 | flags |= OSC_PCI_EXPRESS_AER_CONTROL; | |
587 | } | |
588 | ||
589 | dev_info(root->bus->bridge, | |
590 | "Requesting ACPI _OSC control (0x%02x)\n", flags); | |
591 | ||
592 | status = acpi_pci_osc_control_set(device->handle, &flags, | |
593 | OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL); | |
594 | if (ACPI_SUCCESS(status)) | |
595 | dev_info(root->bus->bridge, | |
596 | "ACPI _OSC control (0x%02x) granted\n", flags); | |
597 | else | |
598 | dev_dbg(root->bus->bridge, | |
599 | "ACPI _OSC request failed (code %d)\n", status); | |
600 | } | |
601 | ||
b67ea761 RW |
602 | pci_acpi_add_bus_pm_notifier(device, root->bus); |
603 | if (device->wakeup.flags.run_wake) | |
604 | device_set_run_wake(root->bus->bridge, true); | |
605 | ||
f5eebbe1 | 606 | return 0; |
1da177e4 | 607 | |
f5eebbe1 BH |
608 | end: |
609 | if (!list_empty(&root->node)) | |
610 | list_del(&root->node); | |
611 | kfree(root); | |
d550d98d | 612 | return result; |
1da177e4 LT |
613 | } |
614 | ||
4be44fcd | 615 | static int acpi_pci_root_start(struct acpi_device *device) |
c431ada4 | 616 | { |
caf420c6 | 617 | struct acpi_pci_root *root = acpi_driver_data(device); |
c431ada4 | 618 | |
caf420c6 BH |
619 | pci_bus_add_devices(root->bus); |
620 | return 0; | |
c431ada4 | 621 | } |
1da177e4 | 622 | |
4be44fcd | 623 | static int acpi_pci_root_remove(struct acpi_device *device, int type) |
1da177e4 | 624 | { |
caf420c6 | 625 | struct acpi_pci_root *root = acpi_driver_data(device); |
1da177e4 | 626 | |
b67ea761 RW |
627 | device_set_run_wake(root->bus->bridge, false); |
628 | pci_acpi_remove_bus_pm_notifier(device); | |
629 | ||
1da177e4 | 630 | kfree(root); |
d550d98d | 631 | return 0; |
1da177e4 LT |
632 | } |
633 | ||
4be44fcd | 634 | static int __init acpi_pci_root_init(void) |
1da177e4 | 635 | { |
d3072e6a RW |
636 | acpi_hest_init(); |
637 | ||
1da177e4 | 638 | if (acpi_pci_disabled) |
d550d98d | 639 | return 0; |
1da177e4 | 640 | |
7bc5e3f2 | 641 | pci_acpi_crs_quirks(); |
1da177e4 | 642 | if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0) |
d550d98d | 643 | return -ENODEV; |
1da177e4 | 644 | |
d550d98d | 645 | return 0; |
1da177e4 LT |
646 | } |
647 | ||
648 | subsys_initcall(acpi_pci_root_init); |