Commit | Line | Data |
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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> | |
d0020f65 | 30 | #include <linux/mutex.h> |
1da177e4 | 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> |
eca67315 | 35 | #include <linux/pci-aspm.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> | |
415e12b2 | 40 | #include <acpi/apei.h> |
1da177e4 | 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 | |
415e12b2 RW |
52 | #define ACPI_PCIE_REQ_SUPPORT (OSC_EXT_PCI_CONFIG_SUPPORT \ |
53 | | OSC_ACTIVE_STATE_PWR_SUPPORT \ | |
54 | | OSC_CLOCK_PWR_CAPABILITY_SUPPORT \ | |
55 | | OSC_MSI_SUPPORT) | |
56 | ||
c97adf9e | 57 | static const struct acpi_device_id root_device_ids[] = { |
1ba90e3a TR |
58 | {"PNP0A03", 0}, |
59 | {"", 0}, | |
60 | }; | |
61 | MODULE_DEVICE_TABLE(acpi, root_device_ids); | |
62 | ||
1da177e4 | 63 | static struct acpi_driver acpi_pci_root_driver = { |
c2b6705b | 64 | .name = "pci_root", |
4be44fcd | 65 | .class = ACPI_PCI_ROOT_CLASS, |
1ba90e3a | 66 | .ids = root_device_ids, |
4be44fcd LB |
67 | .ops = { |
68 | .add = acpi_pci_root_add, | |
69 | .remove = acpi_pci_root_remove, | |
70 | .start = acpi_pci_root_start, | |
71 | }, | |
1da177e4 LT |
72 | }; |
73 | ||
d0020f65 TI |
74 | /* Lock to protect both acpi_pci_roots and acpi_pci_drivers lists */ |
75 | static DEFINE_MUTEX(acpi_pci_root_lock); | |
1da177e4 | 76 | static LIST_HEAD(acpi_pci_roots); |
8ee5bdf3 | 77 | static LIST_HEAD(acpi_pci_drivers); |
1da177e4 | 78 | |
63f10f0f | 79 | static DEFINE_MUTEX(osc_lock); |
1da177e4 LT |
80 | |
81 | int acpi_pci_register_driver(struct acpi_pci_driver *driver) | |
82 | { | |
83 | int n = 0; | |
c1aec834 | 84 | struct acpi_pci_root *root; |
1da177e4 | 85 | |
d0020f65 | 86 | mutex_lock(&acpi_pci_root_lock); |
8ee5bdf3 | 87 | list_add_tail(&driver->node, &acpi_pci_drivers); |
d0020f65 TI |
88 | if (driver->add) |
89 | list_for_each_entry(root, &acpi_pci_roots, node) { | |
55bfe3c0 | 90 | driver->add(root); |
d0020f65 TI |
91 | n++; |
92 | } | |
93 | mutex_unlock(&acpi_pci_root_lock); | |
1da177e4 LT |
94 | |
95 | return n; | |
96 | } | |
97 | EXPORT_SYMBOL(acpi_pci_register_driver); | |
98 | ||
99 | void acpi_pci_unregister_driver(struct acpi_pci_driver *driver) | |
100 | { | |
c1aec834 | 101 | struct acpi_pci_root *root; |
1da177e4 | 102 | |
d0020f65 | 103 | mutex_lock(&acpi_pci_root_lock); |
8ee5bdf3 | 104 | list_del(&driver->node); |
d0020f65 TI |
105 | if (driver->remove) |
106 | list_for_each_entry(root, &acpi_pci_roots, node) | |
55bfe3c0 | 107 | driver->remove(root); |
d0020f65 | 108 | mutex_unlock(&acpi_pci_root_lock); |
1da177e4 LT |
109 | } |
110 | EXPORT_SYMBOL(acpi_pci_unregister_driver); | |
111 | ||
d91a0078 JC |
112 | acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus) |
113 | { | |
c1aec834 | 114 | struct acpi_pci_root *root; |
d91a0078 | 115 | |
c1aec834 | 116 | list_for_each_entry(root, &acpi_pci_roots, node) |
6ad95513 BH |
117 | if ((root->segment == (u16) seg) && |
118 | (root->secondary.start == (u16) bus)) | |
c1aec834 | 119 | return root->device->handle; |
d91a0078 JC |
120 | return NULL; |
121 | } | |
122 | ||
123 | EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle); | |
124 | ||
27558203 AC |
125 | /** |
126 | * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge | |
127 | * @handle - the ACPI CA node in question. | |
128 | * | |
129 | * Note: we could make this API take a struct acpi_device * instead, but | |
130 | * for now, it's more convenient to operate on an acpi_handle. | |
131 | */ | |
132 | int acpi_is_root_bridge(acpi_handle handle) | |
133 | { | |
134 | int ret; | |
135 | struct acpi_device *device; | |
136 | ||
137 | ret = acpi_bus_get_device(handle, &device); | |
138 | if (ret) | |
139 | return 0; | |
140 | ||
141 | ret = acpi_match_device_ids(device, root_device_ids); | |
142 | if (ret) | |
143 | return 0; | |
144 | else | |
145 | return 1; | |
146 | } | |
147 | EXPORT_SYMBOL_GPL(acpi_is_root_bridge); | |
148 | ||
1da177e4 | 149 | static acpi_status |
4be44fcd | 150 | get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) |
1da177e4 | 151 | { |
6ad95513 | 152 | struct resource *res = data; |
1da177e4 LT |
153 | struct acpi_resource_address64 address; |
154 | ||
50eca3eb BM |
155 | if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 && |
156 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 && | |
157 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS64) | |
1da177e4 LT |
158 | return AE_OK; |
159 | ||
160 | acpi_resource_to_address64(resource, &address); | |
4be44fcd | 161 | if ((address.address_length > 0) && |
6ad95513 BH |
162 | (address.resource_type == ACPI_BUS_NUMBER_RANGE)) { |
163 | res->start = address.minimum; | |
164 | res->end = address.minimum + address.address_length - 1; | |
165 | } | |
1da177e4 LT |
166 | |
167 | return AE_OK; | |
168 | } | |
169 | ||
f5eebbe1 | 170 | static acpi_status try_get_root_bridge_busnr(acpi_handle handle, |
6ad95513 | 171 | struct resource *res) |
1da177e4 LT |
172 | { |
173 | acpi_status status; | |
174 | ||
6ad95513 | 175 | res->start = -1; |
4be44fcd LB |
176 | status = |
177 | acpi_walk_resources(handle, METHOD_NAME__CRS, | |
6ad95513 | 178 | get_root_bridge_busnr_callback, res); |
1da177e4 LT |
179 | if (ACPI_FAILURE(status)) |
180 | return status; | |
6ad95513 | 181 | if (res->start == -1) |
1da177e4 LT |
182 | return AE_ERROR; |
183 | return AE_OK; | |
184 | } | |
185 | ||
2786f6e3 RZ |
186 | static void acpi_pci_bridge_scan(struct acpi_device *device) |
187 | { | |
188 | int status; | |
189 | struct acpi_device *child = NULL; | |
190 | ||
191 | if (device->flags.bus_address) | |
192 | if (device->parent && device->parent->ops.bind) { | |
193 | status = device->parent->ops.bind(device); | |
194 | if (!status) { | |
195 | list_for_each_entry(child, &device->children, node) | |
196 | acpi_pci_bridge_scan(child); | |
197 | } | |
198 | } | |
199 | } | |
200 | ||
3a9622dc | 201 | static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; |
63f10f0f KK |
202 | |
203 | static acpi_status acpi_pci_run_osc(acpi_handle handle, | |
204 | const u32 *capbuf, u32 *retval) | |
205 | { | |
3a9622dc SL |
206 | struct acpi_osc_context context = { |
207 | .uuid_str = pci_osc_uuid_str, | |
208 | .rev = 1, | |
209 | .cap.length = 12, | |
210 | .cap.pointer = (void *)capbuf, | |
211 | }; | |
63f10f0f | 212 | acpi_status status; |
63f10f0f | 213 | |
3a9622dc SL |
214 | status = acpi_run_osc(handle, &context); |
215 | if (ACPI_SUCCESS(status)) { | |
216 | *retval = *((u32 *)(context.ret.pointer + 8)); | |
217 | kfree(context.ret.pointer); | |
63f10f0f | 218 | } |
63f10f0f KK |
219 | return status; |
220 | } | |
221 | ||
ab8e8957 RW |
222 | static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, |
223 | u32 support, | |
224 | u32 *control) | |
63f10f0f KK |
225 | { |
226 | acpi_status status; | |
ab8e8957 RW |
227 | u32 result, capbuf[3]; |
228 | ||
229 | support &= OSC_PCI_SUPPORT_MASKS; | |
230 | support |= root->osc_support_set; | |
63f10f0f | 231 | |
63f10f0f | 232 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; |
ab8e8957 RW |
233 | capbuf[OSC_SUPPORT_TYPE] = support; |
234 | if (control) { | |
235 | *control &= OSC_PCI_CONTROL_MASKS; | |
236 | capbuf[OSC_CONTROL_TYPE] = *control | root->osc_control_set; | |
237 | } else { | |
238 | /* Run _OSC query for all possible controls. */ | |
239 | capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS; | |
240 | } | |
63f10f0f KK |
241 | |
242 | status = acpi_pci_run_osc(root->device->handle, capbuf, &result); | |
243 | if (ACPI_SUCCESS(status)) { | |
ab8e8957 | 244 | root->osc_support_set = support; |
2b8fd918 | 245 | if (control) |
ab8e8957 | 246 | *control = result; |
63f10f0f KK |
247 | } |
248 | return status; | |
249 | } | |
250 | ||
251 | static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) | |
252 | { | |
253 | acpi_status status; | |
254 | acpi_handle tmp; | |
255 | ||
256 | status = acpi_get_handle(root->device->handle, "_OSC", &tmp); | |
257 | if (ACPI_FAILURE(status)) | |
258 | return status; | |
259 | mutex_lock(&osc_lock); | |
ab8e8957 | 260 | status = acpi_pci_query_osc(root, flags, NULL); |
63f10f0f KK |
261 | mutex_unlock(&osc_lock); |
262 | return status; | |
263 | } | |
264 | ||
76d56de5 | 265 | struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) |
63f10f0f KK |
266 | { |
267 | struct acpi_pci_root *root; | |
c1aec834 | 268 | |
63f10f0f KK |
269 | list_for_each_entry(root, &acpi_pci_roots, node) { |
270 | if (root->device->handle == handle) | |
271 | return root; | |
272 | } | |
273 | return NULL; | |
274 | } | |
76d56de5 | 275 | EXPORT_SYMBOL_GPL(acpi_pci_find_root); |
63f10f0f | 276 | |
2f7bbceb AC |
277 | struct acpi_handle_node { |
278 | struct list_head node; | |
279 | acpi_handle handle; | |
280 | }; | |
281 | ||
282 | /** | |
283 | * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev | |
284 | * @handle: the handle in question | |
285 | * | |
286 | * Given an ACPI CA handle, the desired PCI device is located in the | |
287 | * list of PCI devices. | |
288 | * | |
289 | * If the device is found, its reference count is increased and this | |
290 | * function returns a pointer to its data structure. The caller must | |
291 | * decrement the reference count by calling pci_dev_put(). | |
292 | * If no device is found, %NULL is returned. | |
293 | */ | |
294 | struct pci_dev *acpi_get_pci_dev(acpi_handle handle) | |
295 | { | |
296 | int dev, fn; | |
297 | unsigned long long adr; | |
298 | acpi_status status; | |
299 | acpi_handle phandle; | |
300 | struct pci_bus *pbus; | |
301 | struct pci_dev *pdev = NULL; | |
302 | struct acpi_handle_node *node, *tmp; | |
303 | struct acpi_pci_root *root; | |
304 | LIST_HEAD(device_list); | |
305 | ||
306 | /* | |
307 | * Walk up the ACPI CA namespace until we reach a PCI root bridge. | |
308 | */ | |
309 | phandle = handle; | |
310 | while (!acpi_is_root_bridge(phandle)) { | |
311 | node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); | |
312 | if (!node) | |
313 | goto out; | |
314 | ||
315 | INIT_LIST_HEAD(&node->node); | |
316 | node->handle = phandle; | |
317 | list_add(&node->node, &device_list); | |
318 | ||
319 | status = acpi_get_parent(phandle, &phandle); | |
320 | if (ACPI_FAILURE(status)) | |
321 | goto out; | |
322 | } | |
323 | ||
324 | root = acpi_pci_find_root(phandle); | |
325 | if (!root) | |
326 | goto out; | |
327 | ||
328 | pbus = root->bus; | |
329 | ||
330 | /* | |
331 | * Now, walk back down the PCI device tree until we return to our | |
332 | * original handle. Assumes that everything between the PCI root | |
333 | * bridge and the device we're looking for must be a P2P bridge. | |
334 | */ | |
335 | list_for_each_entry(node, &device_list, node) { | |
336 | acpi_handle hnd = node->handle; | |
337 | status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); | |
338 | if (ACPI_FAILURE(status)) | |
339 | goto out; | |
340 | dev = (adr >> 16) & 0xffff; | |
341 | fn = adr & 0xffff; | |
342 | ||
343 | pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); | |
412af978 | 344 | if (!pdev || hnd == handle) |
2f7bbceb AC |
345 | break; |
346 | ||
347 | pbus = pdev->subordinate; | |
348 | pci_dev_put(pdev); | |
497fb54f RW |
349 | |
350 | /* | |
351 | * This function may be called for a non-PCI device that has a | |
352 | * PCI parent (eg. a disk under a PCI SATA controller). In that | |
353 | * case pdev->subordinate will be NULL for the parent. | |
354 | */ | |
355 | if (!pbus) { | |
356 | dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n"); | |
357 | pdev = NULL; | |
358 | break; | |
359 | } | |
2f7bbceb AC |
360 | } |
361 | out: | |
362 | list_for_each_entry_safe(node, tmp, &device_list, node) | |
363 | kfree(node); | |
364 | ||
365 | return pdev; | |
366 | } | |
367 | EXPORT_SYMBOL_GPL(acpi_get_pci_dev); | |
368 | ||
63f10f0f | 369 | /** |
75fb60f2 RW |
370 | * acpi_pci_osc_control_set - Request control of PCI root _OSC features. |
371 | * @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex). | |
372 | * @mask: Mask of _OSC bits to request control of, place to store control mask. | |
373 | * @req: Mask of _OSC bits the control of is essential to the caller. | |
63f10f0f | 374 | * |
75fb60f2 RW |
375 | * Run _OSC query for @mask and if that is successful, compare the returned |
376 | * mask of control bits with @req. If all of the @req bits are set in the | |
377 | * returned mask, run _OSC request for it. | |
378 | * | |
379 | * The variable at the @mask address may be modified regardless of whether or | |
380 | * not the function returns success. On success it will contain the mask of | |
381 | * _OSC bits the BIOS has granted control of, but its contents are meaningless | |
382 | * on failure. | |
63f10f0f | 383 | **/ |
75fb60f2 | 384 | acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req) |
63f10f0f | 385 | { |
75fb60f2 | 386 | struct acpi_pci_root *root; |
63f10f0f | 387 | acpi_status status; |
75fb60f2 | 388 | u32 ctrl, capbuf[3]; |
63f10f0f | 389 | acpi_handle tmp; |
63f10f0f | 390 | |
75fb60f2 RW |
391 | if (!mask) |
392 | return AE_BAD_PARAMETER; | |
393 | ||
394 | ctrl = *mask & OSC_PCI_CONTROL_MASKS; | |
395 | if ((ctrl & req) != req) | |
63f10f0f KK |
396 | return AE_TYPE; |
397 | ||
398 | root = acpi_pci_find_root(handle); | |
399 | if (!root) | |
400 | return AE_NOT_EXIST; | |
401 | ||
b879dc4b RW |
402 | status = acpi_get_handle(handle, "_OSC", &tmp); |
403 | if (ACPI_FAILURE(status)) | |
404 | return status; | |
405 | ||
63f10f0f | 406 | mutex_lock(&osc_lock); |
75fb60f2 RW |
407 | |
408 | *mask = ctrl | root->osc_control_set; | |
63f10f0f | 409 | /* No need to evaluate _OSC if the control was already granted. */ |
75fb60f2 | 410 | if ((root->osc_control_set & ctrl) == ctrl) |
63f10f0f KK |
411 | goto out; |
412 | ||
75fb60f2 RW |
413 | /* Need to check the available controls bits before requesting them. */ |
414 | while (*mask) { | |
415 | status = acpi_pci_query_osc(root, root->osc_support_set, mask); | |
416 | if (ACPI_FAILURE(status)) | |
417 | goto out; | |
418 | if (ctrl == *mask) | |
419 | break; | |
420 | ctrl = *mask; | |
421 | } | |
2b8fd918 | 422 | |
75fb60f2 | 423 | if ((ctrl & req) != req) { |
63f10f0f KK |
424 | status = AE_SUPPORT; |
425 | goto out; | |
426 | } | |
427 | ||
428 | capbuf[OSC_QUERY_TYPE] = 0; | |
429 | capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set; | |
75fb60f2 RW |
430 | capbuf[OSC_CONTROL_TYPE] = ctrl; |
431 | status = acpi_pci_run_osc(handle, capbuf, mask); | |
63f10f0f | 432 | if (ACPI_SUCCESS(status)) |
75fb60f2 | 433 | root->osc_control_set = *mask; |
63f10f0f KK |
434 | out: |
435 | mutex_unlock(&osc_lock); | |
436 | return status; | |
437 | } | |
9f5404d8 | 438 | EXPORT_SYMBOL(acpi_pci_osc_control_set); |
63f10f0f | 439 | |
b5678a34 | 440 | static int __devinit acpi_pci_root_add(struct acpi_device *device) |
1da177e4 | 441 | { |
f5eebbe1 BH |
442 | unsigned long long segment, bus; |
443 | acpi_status status; | |
444 | int result; | |
445 | struct acpi_pci_root *root; | |
446 | acpi_handle handle; | |
2786f6e3 | 447 | struct acpi_device *child; |
0ef5f8f6 | 448 | u32 flags, base_flags; |
1da177e4 | 449 | |
6ad95513 BH |
450 | root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); |
451 | if (!root) | |
452 | return -ENOMEM; | |
453 | ||
f5eebbe1 BH |
454 | segment = 0; |
455 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL, | |
456 | &segment); | |
457 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
458 | printk(KERN_ERR PREFIX "can't evaluate _SEG\n"); | |
6ad95513 BH |
459 | result = -ENODEV; |
460 | goto end; | |
f5eebbe1 | 461 | } |
1da177e4 | 462 | |
f5eebbe1 | 463 | /* Check _CRS first, then _BBN. If no _BBN, default to zero. */ |
6ad95513 BH |
464 | root->secondary.flags = IORESOURCE_BUS; |
465 | status = try_get_root_bridge_busnr(device->handle, &root->secondary); | |
f5eebbe1 | 466 | if (ACPI_FAILURE(status)) { |
6ad95513 BH |
467 | /* |
468 | * We need both the start and end of the downstream bus range | |
469 | * to interpret _CBA (MMCONFIG base address), so it really is | |
470 | * supposed to be in _CRS. If we don't find it there, all we | |
471 | * can do is assume [_BBN-0xFF] or [0-0xFF]. | |
472 | */ | |
473 | root->secondary.end = 0xFF; | |
474 | printk(KERN_WARNING FW_BUG PREFIX | |
475 | "no secondary bus range in _CRS\n"); | |
e545b55a JM |
476 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, |
477 | NULL, &bus); | |
6ad95513 BH |
478 | if (ACPI_SUCCESS(status)) |
479 | root->secondary.start = bus; | |
480 | else if (status == AE_NOT_FOUND) | |
481 | root->secondary.start = 0; | |
482 | else { | |
483 | printk(KERN_ERR PREFIX "can't evaluate _BBN\n"); | |
484 | result = -ENODEV; | |
485 | goto end; | |
f5eebbe1 BH |
486 | } |
487 | } | |
1da177e4 | 488 | |
f5eebbe1 | 489 | INIT_LIST_HEAD(&root->node); |
32917e5b | 490 | root->device = device; |
0705495d | 491 | root->segment = segment & 0xFFFF; |
1da177e4 LT |
492 | strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); |
493 | strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); | |
db89b4f0 | 494 | device->driver_data = root; |
1da177e4 | 495 | |
f4b57a3b JL |
496 | root->mcfg_addr = acpi_pci_root_get_mcfg_addr(device->handle); |
497 | ||
990a7ac5 AP |
498 | /* |
499 | * All supported architectures that use ACPI have support for | |
500 | * PCI domains, so we indicate this in _OSC support capabilities. | |
501 | */ | |
0ef5f8f6 | 502 | flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; |
63f10f0f | 503 | acpi_pci_osc_support(root, flags); |
990a7ac5 | 504 | |
1da177e4 LT |
505 | /* |
506 | * TBD: Need PCI interface for enumeration/configuration of roots. | |
507 | */ | |
508 | ||
4be44fcd LB |
509 | /* TBD: Locking */ |
510 | list_add_tail(&root->node, &acpi_pci_roots); | |
1da177e4 | 511 | |
6ad95513 | 512 | printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n", |
4be44fcd | 513 | acpi_device_name(device), acpi_device_bid(device), |
6ad95513 | 514 | root->segment, &root->secondary); |
1da177e4 LT |
515 | |
516 | /* | |
517 | * Scan the Root Bridge | |
518 | * -------------------- | |
519 | * Must do this prior to any attempt to bind the root device, as the | |
520 | * PCI namespace does not get created until this call is made (and | |
521 | * thus the root bridge's pci_dev does not exist). | |
522 | */ | |
57283776 | 523 | root->bus = pci_acpi_scan_root(root); |
1da177e4 | 524 | if (!root->bus) { |
6468463a LB |
525 | printk(KERN_ERR PREFIX |
526 | "Bus %04x:%02x not present in PCI namespace\n", | |
6ad95513 | 527 | root->segment, (unsigned int)root->secondary.start); |
1da177e4 LT |
528 | result = -ENODEV; |
529 | goto end; | |
530 | } | |
531 | ||
532 | /* | |
533 | * Attach ACPI-PCI Context | |
534 | * ----------------------- | |
535 | * Thus binding the ACPI and PCI devices. | |
536 | */ | |
499650de | 537 | result = acpi_pci_bind_root(device); |
1da177e4 LT |
538 | if (result) |
539 | goto end; | |
540 | ||
541 | /* | |
542 | * PCI Routing Table | |
543 | * ----------------- | |
544 | * Evaluate and parse _PRT, if exists. | |
545 | */ | |
2d1e0a02 | 546 | status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); |
1da177e4 | 547 | if (ACPI_SUCCESS(status)) |
859a3f86 | 548 | result = acpi_pci_irq_add_prt(device->handle, root->bus); |
1da177e4 | 549 | |
2786f6e3 RZ |
550 | /* |
551 | * Scan and bind all _ADR-Based Devices | |
552 | */ | |
553 | list_for_each_entry(child, &device->children, node) | |
554 | acpi_pci_bridge_scan(child); | |
555 | ||
0ef5f8f6 AP |
556 | /* Indicate support for various _OSC capabilities. */ |
557 | if (pci_ext_cfg_avail(root->bus->self)) | |
558 | flags |= OSC_EXT_PCI_CONFIG_SUPPORT; | |
8b8bae90 | 559 | if (pcie_aspm_support_enabled()) |
3e1b1600 AP |
560 | flags |= OSC_ACTIVE_STATE_PWR_SUPPORT | |
561 | OSC_CLOCK_PWR_CAPABILITY_SUPPORT; | |
07ae95f9 AP |
562 | if (pci_msi_enabled()) |
563 | flags |= OSC_MSI_SUPPORT; | |
0ef5f8f6 | 564 | if (flags != base_flags) |
63f10f0f | 565 | acpi_pci_osc_support(root, flags); |
0ef5f8f6 | 566 | |
415e12b2 RW |
567 | if (!pcie_ports_disabled |
568 | && (flags & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) { | |
569 | flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL | |
570 | | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | |
571 | | OSC_PCI_EXPRESS_PME_CONTROL; | |
572 | ||
573 | if (pci_aer_available()) { | |
574 | if (aer_acpi_firmware_first()) | |
575 | dev_dbg(root->bus->bridge, | |
576 | "PCIe errors handled by BIOS.\n"); | |
577 | else | |
578 | flags |= OSC_PCI_EXPRESS_AER_CONTROL; | |
579 | } | |
580 | ||
581 | dev_info(root->bus->bridge, | |
582 | "Requesting ACPI _OSC control (0x%02x)\n", flags); | |
583 | ||
584 | status = acpi_pci_osc_control_set(device->handle, &flags, | |
585 | OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL); | |
eca67315 | 586 | if (ACPI_SUCCESS(status)) { |
415e12b2 RW |
587 | dev_info(root->bus->bridge, |
588 | "ACPI _OSC control (0x%02x) granted\n", flags); | |
3c076351 MG |
589 | if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { |
590 | /* | |
591 | * We have ASPM control, but the FADT indicates | |
592 | * that it's unsupported. Clear it. | |
593 | */ | |
594 | pcie_clear_aspm(root->bus); | |
595 | } | |
eca67315 | 596 | } else { |
a246670d RW |
597 | dev_info(root->bus->bridge, |
598 | "ACPI _OSC request failed (%s), " | |
599 | "returned control mask: 0x%02x\n", | |
600 | acpi_format_exception(status), flags); | |
601 | pr_info("ACPI _OSC control for PCIe not granted, " | |
602 | "disabling ASPM\n"); | |
eca67315 NC |
603 | pcie_no_aspm(); |
604 | } | |
a246670d RW |
605 | } else { |
606 | dev_info(root->bus->bridge, | |
607 | "Unable to request _OSC control " | |
608 | "(_OSC support mask: 0x%02x)\n", flags); | |
415e12b2 RW |
609 | } |
610 | ||
b67ea761 RW |
611 | pci_acpi_add_bus_pm_notifier(device, root->bus); |
612 | if (device->wakeup.flags.run_wake) | |
613 | device_set_run_wake(root->bus->bridge, true); | |
614 | ||
f5eebbe1 | 615 | return 0; |
1da177e4 | 616 | |
f5eebbe1 BH |
617 | end: |
618 | if (!list_empty(&root->node)) | |
619 | list_del(&root->node); | |
620 | kfree(root); | |
d550d98d | 621 | return result; |
1da177e4 LT |
622 | } |
623 | ||
4be44fcd | 624 | static int acpi_pci_root_start(struct acpi_device *device) |
c431ada4 | 625 | { |
caf420c6 | 626 | struct acpi_pci_root *root = acpi_driver_data(device); |
c8e9afb1 JL |
627 | struct acpi_pci_driver *driver; |
628 | ||
d0020f65 | 629 | mutex_lock(&acpi_pci_root_lock); |
c8e9afb1 JL |
630 | list_for_each_entry(driver, &acpi_pci_drivers, node) |
631 | if (driver->add) | |
55bfe3c0 | 632 | driver->add(root); |
d0020f65 | 633 | mutex_unlock(&acpi_pci_root_lock); |
c431ada4 | 634 | |
caf420c6 | 635 | pci_bus_add_devices(root->bus); |
c8e9afb1 | 636 | |
caf420c6 | 637 | return 0; |
c431ada4 | 638 | } |
1da177e4 | 639 | |
4be44fcd | 640 | static int acpi_pci_root_remove(struct acpi_device *device, int type) |
1da177e4 | 641 | { |
caf420c6 | 642 | struct acpi_pci_root *root = acpi_driver_data(device); |
c8e9afb1 JL |
643 | struct acpi_pci_driver *driver; |
644 | ||
d0020f65 | 645 | mutex_lock(&acpi_pci_root_lock); |
c8e9afb1 JL |
646 | list_for_each_entry(driver, &acpi_pci_drivers, node) |
647 | if (driver->remove) | |
55bfe3c0 | 648 | driver->remove(root); |
d0020f65 | 649 | mutex_unlock(&acpi_pci_root_lock); |
1da177e4 | 650 | |
b67ea761 RW |
651 | device_set_run_wake(root->bus->bridge, false); |
652 | pci_acpi_remove_bus_pm_notifier(device); | |
653 | ||
1da177e4 | 654 | kfree(root); |
d550d98d | 655 | return 0; |
1da177e4 LT |
656 | } |
657 | ||
4be44fcd | 658 | static int __init acpi_pci_root_init(void) |
1da177e4 | 659 | { |
d3072e6a RW |
660 | acpi_hest_init(); |
661 | ||
1da177e4 | 662 | if (acpi_pci_disabled) |
d550d98d | 663 | return 0; |
1da177e4 | 664 | |
7bc5e3f2 | 665 | pci_acpi_crs_quirks(); |
1da177e4 | 666 | if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0) |
d550d98d | 667 | return -ENODEV; |
1da177e4 | 668 | |
d550d98d | 669 | return 0; |
1da177e4 LT |
670 | } |
671 | ||
672 | subsys_initcall(acpi_pci_root_init); |