Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /** |
d985c108 | 2 | * \file drm_agpsupport.c |
1da177e4 | 3 | * DRM support for AGP/GART backend |
b5e89ed5 | 4 | * |
1da177e4 LT |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. | |
11 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
12 | * All Rights Reserved. | |
13 | * | |
14 | * Permission is hereby granted, free of charge, to any person obtaining a | |
15 | * copy of this software and associated documentation files (the "Software"), | |
16 | * to deal in the Software without restriction, including without limitation | |
17 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
18 | * and/or sell copies of the Software, and to permit persons to whom the | |
19 | * Software is furnished to do so, subject to the following conditions: | |
20 | * | |
21 | * The above copyright notice and this permission notice (including the next | |
22 | * paragraph) shall be included in all copies or substantial portions of the | |
23 | * Software. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
26 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
27 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
28 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
29 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
30 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
31 | * OTHER DEALINGS IN THE SOFTWARE. | |
32 | */ | |
33 | ||
34 | #include "drmP.h" | |
35 | #include <linux/module.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
1da177e4 LT |
37 | |
38 | #if __OS_HAS_AGP | |
39 | ||
1bb88edb EA |
40 | #include <asm/agp.h> |
41 | ||
1da177e4 | 42 | /** |
7ab98401 | 43 | * Get AGP information. |
1da177e4 LT |
44 | * |
45 | * \param inode device inode. | |
6c340eac | 46 | * \param file_priv DRM file private. |
1da177e4 LT |
47 | * \param cmd command. |
48 | * \param arg pointer to a (output) drm_agp_info structure. | |
49 | * \return zero on success or a negative number on failure. | |
50 | * | |
51 | * Verifies the AGP device has been initialized and acquired and fills in the | |
52 | * drm_agp_info structure with the information in drm_agp_head::agp_info. | |
53 | */ | |
84b1fd10 | 54 | int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info) |
1da177e4 | 55 | { |
b5e89ed5 | 56 | DRM_AGP_KERN *kern; |
1da177e4 LT |
57 | |
58 | if (!dev->agp || !dev->agp->acquired) | |
59 | return -EINVAL; | |
60 | ||
b5e89ed5 | 61 | kern = &dev->agp->agp_info; |
7ab98401 DA |
62 | info->agp_version_major = kern->version.major; |
63 | info->agp_version_minor = kern->version.minor; | |
b5e89ed5 DA |
64 | info->mode = kern->mode; |
65 | info->aperture_base = kern->aper_base; | |
66 | info->aperture_size = kern->aper_size * 1024 * 1024; | |
67 | info->memory_allowed = kern->max_memory << PAGE_SHIFT; | |
68 | info->memory_used = kern->current_memory << PAGE_SHIFT; | |
69 | info->id_vendor = kern->device->vendor; | |
70 | info->id_device = kern->device->device; | |
7ab98401 DA |
71 | |
72 | return 0; | |
73 | } | |
b5e89ed5 | 74 | |
7ab98401 DA |
75 | EXPORT_SYMBOL(drm_agp_info); |
76 | ||
c153f45f EA |
77 | int drm_agp_info_ioctl(struct drm_device *dev, void *data, |
78 | struct drm_file *file_priv) | |
7ab98401 | 79 | { |
c153f45f | 80 | struct drm_agp_info *info = data; |
7ab98401 DA |
81 | int err; |
82 | ||
c153f45f | 83 | err = drm_agp_info(dev, info); |
7ab98401 DA |
84 | if (err) |
85 | return err; | |
b5e89ed5 | 86 | |
1da177e4 LT |
87 | return 0; |
88 | } | |
89 | ||
90 | /** | |
7ab98401 | 91 | * Acquire the AGP device. |
1da177e4 | 92 | * |
d985c108 | 93 | * \param dev DRM device that is to acquire AGP. |
b5e89ed5 | 94 | * \return zero on success or a negative number on failure. |
1da177e4 LT |
95 | * |
96 | * Verifies the AGP device hasn't been acquired before and calls | |
7ab98401 | 97 | * \c agp_backend_acquire. |
1da177e4 | 98 | */ |
84b1fd10 | 99 | int drm_agp_acquire(struct drm_device * dev) |
1da177e4 | 100 | { |
1da177e4 LT |
101 | if (!dev->agp) |
102 | return -ENODEV; | |
103 | if (dev->agp->acquired) | |
104 | return -EBUSY; | |
105 | if (!(dev->agp->bridge = agp_backend_acquire(dev->pdev))) | |
106 | return -ENODEV; | |
107 | dev->agp->acquired = 1; | |
108 | return 0; | |
109 | } | |
b5e89ed5 | 110 | |
7ab98401 | 111 | EXPORT_SYMBOL(drm_agp_acquire); |
1da177e4 LT |
112 | |
113 | /** | |
7ab98401 | 114 | * Acquire the AGP device (ioctl). |
1da177e4 LT |
115 | * |
116 | * \param inode device inode. | |
6c340eac | 117 | * \param file_priv DRM file private. |
1da177e4 LT |
118 | * \param cmd command. |
119 | * \param arg user argument. | |
120 | * \return zero on success or a negative number on failure. | |
121 | * | |
7ab98401 DA |
122 | * Verifies the AGP device hasn't been acquired before and calls |
123 | * \c agp_backend_acquire. | |
1da177e4 | 124 | */ |
c153f45f EA |
125 | int drm_agp_acquire_ioctl(struct drm_device *dev, void *data, |
126 | struct drm_file *file_priv) | |
1da177e4 | 127 | { |
2c14f28b | 128 | return drm_agp_acquire((struct drm_device *) file_priv->minor->dev); |
7ab98401 | 129 | } |
1da177e4 | 130 | |
7ab98401 DA |
131 | /** |
132 | * Release the AGP device. | |
133 | * | |
d985c108 | 134 | * \param dev DRM device that is to release AGP. |
7ab98401 DA |
135 | * \return zero on success or a negative number on failure. |
136 | * | |
137 | * Verifies the AGP device has been acquired and calls \c agp_backend_release. | |
138 | */ | |
84b1fd10 | 139 | int drm_agp_release(struct drm_device * dev) |
7ab98401 | 140 | { |
1da177e4 LT |
141 | if (!dev->agp || !dev->agp->acquired) |
142 | return -EINVAL; | |
143 | agp_backend_release(dev->agp->bridge); | |
144 | dev->agp->acquired = 0; | |
145 | return 0; | |
1da177e4 | 146 | } |
7ab98401 | 147 | EXPORT_SYMBOL(drm_agp_release); |
1da177e4 | 148 | |
c153f45f EA |
149 | int drm_agp_release_ioctl(struct drm_device *dev, void *data, |
150 | struct drm_file *file_priv) | |
1da177e4 | 151 | { |
7ab98401 | 152 | return drm_agp_release(dev); |
1da177e4 LT |
153 | } |
154 | ||
155 | /** | |
156 | * Enable the AGP bus. | |
b5e89ed5 | 157 | * |
7ab98401 DA |
158 | * \param dev DRM device that has previously acquired AGP. |
159 | * \param mode Requested AGP mode. | |
1da177e4 LT |
160 | * \return zero on success or a negative number on failure. |
161 | * | |
162 | * Verifies the AGP device has been acquired but not enabled, and calls | |
7ab98401 | 163 | * \c agp_enable. |
1da177e4 | 164 | */ |
84b1fd10 | 165 | int drm_agp_enable(struct drm_device * dev, struct drm_agp_mode mode) |
1da177e4 | 166 | { |
1da177e4 LT |
167 | if (!dev->agp || !dev->agp->acquired) |
168 | return -EINVAL; | |
169 | ||
b5e89ed5 | 170 | dev->agp->mode = mode.mode; |
1da177e4 | 171 | agp_enable(dev->agp->bridge, mode.mode); |
1da177e4 LT |
172 | dev->agp->enabled = 1; |
173 | return 0; | |
174 | } | |
b5e89ed5 | 175 | |
7ab98401 DA |
176 | EXPORT_SYMBOL(drm_agp_enable); |
177 | ||
c153f45f EA |
178 | int drm_agp_enable_ioctl(struct drm_device *dev, void *data, |
179 | struct drm_file *file_priv) | |
7ab98401 | 180 | { |
c153f45f | 181 | struct drm_agp_mode *mode = data; |
7ab98401 | 182 | |
c153f45f | 183 | return drm_agp_enable(dev, *mode); |
7ab98401 | 184 | } |
1da177e4 LT |
185 | |
186 | /** | |
187 | * Allocate AGP memory. | |
188 | * | |
189 | * \param inode device inode. | |
6c340eac | 190 | * \param file_priv file private pointer. |
1da177e4 LT |
191 | * \param cmd command. |
192 | * \param arg pointer to a drm_agp_buffer structure. | |
193 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 194 | * |
1da177e4 LT |
195 | * Verifies the AGP device is present and has been acquired, allocates the |
196 | * memory via alloc_agp() and creates a drm_agp_mem entry for it. | |
197 | */ | |
84b1fd10 | 198 | int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request) |
1da177e4 | 199 | { |
55910517 | 200 | struct drm_agp_mem *entry; |
b5e89ed5 DA |
201 | DRM_AGP_MEM *memory; |
202 | unsigned long pages; | |
203 | u32 type; | |
1da177e4 LT |
204 | |
205 | if (!dev->agp || !dev->agp->acquired) | |
206 | return -EINVAL; | |
9a298b2a | 207 | if (!(entry = kmalloc(sizeof(*entry), GFP_KERNEL))) |
1da177e4 LT |
208 | return -ENOMEM; |
209 | ||
b5e89ed5 | 210 | memset(entry, 0, sizeof(*entry)); |
1da177e4 | 211 | |
efa58395 DA |
212 | pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; |
213 | type = (u32) request->type; | |
b5d499cf | 214 | if (!(memory = drm_alloc_agp(dev, pages, type))) { |
9a298b2a | 215 | kfree(entry); |
1da177e4 LT |
216 | return -ENOMEM; |
217 | } | |
218 | ||
b5e89ed5 DA |
219 | entry->handle = (unsigned long)memory->key + 1; |
220 | entry->memory = memory; | |
221 | entry->bound = 0; | |
222 | entry->pages = pages; | |
bd1b331f | 223 | list_add(&entry->head, &dev->agp->memory); |
1da177e4 | 224 | |
efa58395 DA |
225 | request->handle = entry->handle; |
226 | request->physical = memory->physical; | |
227 | ||
228 | return 0; | |
229 | } | |
230 | EXPORT_SYMBOL(drm_agp_alloc); | |
231 | ||
efa58395 | 232 | |
c153f45f EA |
233 | int drm_agp_alloc_ioctl(struct drm_device *dev, void *data, |
234 | struct drm_file *file_priv) | |
235 | { | |
236 | struct drm_agp_buffer *request = data; | |
efa58395 | 237 | |
c153f45f | 238 | return drm_agp_alloc(dev, request); |
1da177e4 LT |
239 | } |
240 | ||
241 | /** | |
242 | * Search for the AGP memory entry associated with a handle. | |
243 | * | |
244 | * \param dev DRM device structure. | |
245 | * \param handle AGP memory handle. | |
246 | * \return pointer to the drm_agp_mem structure associated with \p handle. | |
b5e89ed5 | 247 | * |
1da177e4 LT |
248 | * Walks through drm_agp_head::memory until finding a matching handle. |
249 | */ | |
55910517 | 250 | static struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device * dev, |
b5e89ed5 | 251 | unsigned long handle) |
1da177e4 | 252 | { |
55910517 | 253 | struct drm_agp_mem *entry; |
1da177e4 | 254 | |
bd1b331f | 255 | list_for_each_entry(entry, &dev->agp->memory, head) { |
1da177e4 LT |
256 | if (entry->handle == handle) |
257 | return entry; | |
258 | } | |
259 | return NULL; | |
260 | } | |
261 | ||
262 | /** | |
263 | * Unbind AGP memory from the GATT (ioctl). | |
264 | * | |
265 | * \param inode device inode. | |
6c340eac | 266 | * \param file_priv DRM file private. |
1da177e4 LT |
267 | * \param cmd command. |
268 | * \param arg pointer to a drm_agp_binding structure. | |
269 | * \return zero on success or a negative number on failure. | |
270 | * | |
271 | * Verifies the AGP device is present and acquired, looks-up the AGP memory | |
272 | * entry and passes it to the unbind_agp() function. | |
273 | */ | |
84b1fd10 | 274 | int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request) |
1da177e4 | 275 | { |
55910517 | 276 | struct drm_agp_mem *entry; |
1da177e4 LT |
277 | int ret; |
278 | ||
279 | if (!dev->agp || !dev->agp->acquired) | |
280 | return -EINVAL; | |
efa58395 | 281 | if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
1da177e4 LT |
282 | return -EINVAL; |
283 | if (!entry->bound) | |
284 | return -EINVAL; | |
285 | ret = drm_unbind_agp(entry->memory); | |
286 | if (ret == 0) | |
b5e89ed5 | 287 | entry->bound = 0; |
1da177e4 LT |
288 | return ret; |
289 | } | |
efa58395 DA |
290 | EXPORT_SYMBOL(drm_agp_unbind); |
291 | ||
efa58395 | 292 | |
c153f45f EA |
293 | int drm_agp_unbind_ioctl(struct drm_device *dev, void *data, |
294 | struct drm_file *file_priv) | |
295 | { | |
296 | struct drm_agp_binding *request = data; | |
efa58395 | 297 | |
c153f45f | 298 | return drm_agp_unbind(dev, request); |
efa58395 | 299 | } |
1da177e4 LT |
300 | |
301 | /** | |
302 | * Bind AGP memory into the GATT (ioctl) | |
303 | * | |
304 | * \param inode device inode. | |
6c340eac | 305 | * \param file_priv DRM file private. |
1da177e4 LT |
306 | * \param cmd command. |
307 | * \param arg pointer to a drm_agp_binding structure. | |
308 | * \return zero on success or a negative number on failure. | |
309 | * | |
310 | * Verifies the AGP device is present and has been acquired and that no memory | |
311 | * is currently bound into the GATT. Looks-up the AGP memory entry and passes | |
312 | * it to bind_agp() function. | |
313 | */ | |
84b1fd10 | 314 | int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request) |
1da177e4 | 315 | { |
55910517 | 316 | struct drm_agp_mem *entry; |
b5e89ed5 DA |
317 | int retcode; |
318 | int page; | |
1da177e4 LT |
319 | |
320 | if (!dev->agp || !dev->agp->acquired) | |
321 | return -EINVAL; | |
efa58395 | 322 | if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
1da177e4 LT |
323 | return -EINVAL; |
324 | if (entry->bound) | |
325 | return -EINVAL; | |
efa58395 | 326 | page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; |
1da177e4 LT |
327 | if ((retcode = drm_bind_agp(entry->memory, page))) |
328 | return retcode; | |
329 | entry->bound = dev->agp->base + (page << PAGE_SHIFT); | |
330 | DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n", | |
331 | dev->agp->base, entry->bound); | |
332 | return 0; | |
333 | } | |
efa58395 DA |
334 | EXPORT_SYMBOL(drm_agp_bind); |
335 | ||
efa58395 | 336 | |
c153f45f EA |
337 | int drm_agp_bind_ioctl(struct drm_device *dev, void *data, |
338 | struct drm_file *file_priv) | |
339 | { | |
340 | struct drm_agp_binding *request = data; | |
efa58395 | 341 | |
c153f45f | 342 | return drm_agp_bind(dev, request); |
efa58395 | 343 | } |
1da177e4 LT |
344 | |
345 | /** | |
346 | * Free AGP memory (ioctl). | |
347 | * | |
348 | * \param inode device inode. | |
6c340eac | 349 | * \param file_priv DRM file private. |
1da177e4 LT |
350 | * \param cmd command. |
351 | * \param arg pointer to a drm_agp_buffer structure. | |
352 | * \return zero on success or a negative number on failure. | |
353 | * | |
354 | * Verifies the AGP device is present and has been acquired and looks up the | |
355 | * AGP memory entry. If the memory it's currently bound, unbind it via | |
356 | * unbind_agp(). Frees it via free_agp() as well as the entry itself | |
357 | * and unlinks from the doubly linked list it's inserted in. | |
358 | */ | |
84b1fd10 | 359 | int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request) |
1da177e4 | 360 | { |
55910517 | 361 | struct drm_agp_mem *entry; |
1da177e4 LT |
362 | |
363 | if (!dev->agp || !dev->agp->acquired) | |
364 | return -EINVAL; | |
efa58395 | 365 | if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
1da177e4 LT |
366 | return -EINVAL; |
367 | if (entry->bound) | |
368 | drm_unbind_agp(entry->memory); | |
369 | ||
bd1b331f | 370 | list_del(&entry->head); |
1da177e4 LT |
371 | |
372 | drm_free_agp(entry->memory, entry->pages); | |
9a298b2a | 373 | kfree(entry); |
1da177e4 LT |
374 | return 0; |
375 | } | |
efa58395 DA |
376 | EXPORT_SYMBOL(drm_agp_free); |
377 | ||
efa58395 | 378 | |
efa58395 | 379 | |
c153f45f EA |
380 | int drm_agp_free_ioctl(struct drm_device *dev, void *data, |
381 | struct drm_file *file_priv) | |
382 | { | |
383 | struct drm_agp_buffer *request = data; | |
384 | ||
385 | return drm_agp_free(dev, request); | |
efa58395 | 386 | } |
1da177e4 LT |
387 | |
388 | /** | |
389 | * Initialize the AGP resources. | |
390 | * | |
391 | * \return pointer to a drm_agp_head structure. | |
392 | * | |
d985c108 DA |
393 | * Gets the drm_agp_t structure which is made available by the agpgart module |
394 | * via the inter_module_* functions. Creates and initializes a drm_agp_head | |
395 | * structure. | |
1da177e4 | 396 | */ |
55910517 | 397 | struct drm_agp_head *drm_agp_init(struct drm_device *dev) |
1da177e4 | 398 | { |
55910517 | 399 | struct drm_agp_head *head = NULL; |
1da177e4 | 400 | |
9a298b2a | 401 | if (!(head = kmalloc(sizeof(*head), GFP_KERNEL))) |
1da177e4 LT |
402 | return NULL; |
403 | memset((void *)head, 0, sizeof(*head)); | |
404 | head->bridge = agp_find_bridge(dev->pdev); | |
405 | if (!head->bridge) { | |
406 | if (!(head->bridge = agp_backend_acquire(dev->pdev))) { | |
9a298b2a | 407 | kfree(head); |
1da177e4 LT |
408 | return NULL; |
409 | } | |
410 | agp_copy_info(head->bridge, &head->agp_info); | |
411 | agp_backend_release(head->bridge); | |
412 | } else { | |
413 | agp_copy_info(head->bridge, &head->agp_info); | |
414 | } | |
415 | if (head->agp_info.chipset == NOT_SUPPORTED) { | |
9a298b2a | 416 | kfree(head); |
1da177e4 LT |
417 | return NULL; |
418 | } | |
bd1b331f | 419 | INIT_LIST_HEAD(&head->memory); |
1da177e4 LT |
420 | head->cant_use_aperture = head->agp_info.cant_use_aperture; |
421 | head->page_mask = head->agp_info.page_mask; | |
8b409580 | 422 | head->base = head->agp_info.aper_base; |
1da177e4 LT |
423 | return head; |
424 | } | |
425 | ||
426 | /** Calls agp_allocate_memory() */ | |
b5e89ed5 DA |
427 | DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data * bridge, |
428 | size_t pages, u32 type) | |
1da177e4 LT |
429 | { |
430 | return agp_allocate_memory(bridge, pages, type); | |
431 | } | |
432 | ||
433 | /** Calls agp_free_memory() */ | |
b5e89ed5 | 434 | int drm_agp_free_memory(DRM_AGP_MEM * handle) |
1da177e4 LT |
435 | { |
436 | if (!handle) | |
437 | return 0; | |
438 | agp_free_memory(handle); | |
439 | return 1; | |
440 | } | |
441 | ||
442 | /** Calls agp_bind_memory() */ | |
b5e89ed5 | 443 | int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start) |
1da177e4 LT |
444 | { |
445 | if (!handle) | |
446 | return -EINVAL; | |
447 | return agp_bind_memory(handle, start); | |
448 | } | |
b5e89ed5 | 449 | |
1da177e4 | 450 | /** Calls agp_unbind_memory() */ |
b5e89ed5 | 451 | int drm_agp_unbind_memory(DRM_AGP_MEM * handle) |
1da177e4 LT |
452 | { |
453 | if (!handle) | |
454 | return -EINVAL; | |
455 | return agp_unbind_memory(handle); | |
456 | } | |
457 | ||
673a394b EA |
458 | /** |
459 | * Binds a collection of pages into AGP memory at the given offset, returning | |
460 | * the AGP memory structure containing them. | |
461 | * | |
462 | * No reference is held on the pages during this time -- it is up to the | |
463 | * caller to handle that. | |
464 | */ | |
465 | DRM_AGP_MEM * | |
466 | drm_agp_bind_pages(struct drm_device *dev, | |
467 | struct page **pages, | |
468 | unsigned long num_pages, | |
ba1eb1d8 KP |
469 | uint32_t gtt_offset, |
470 | u32 type) | |
673a394b EA |
471 | { |
472 | DRM_AGP_MEM *mem; | |
473 | int ret, i; | |
474 | ||
475 | DRM_DEBUG("\n"); | |
476 | ||
477 | mem = drm_agp_allocate_memory(dev->agp->bridge, num_pages, | |
ba1eb1d8 | 478 | type); |
673a394b EA |
479 | if (mem == NULL) { |
480 | DRM_ERROR("Failed to allocate memory for %ld pages\n", | |
481 | num_pages); | |
482 | return NULL; | |
483 | } | |
484 | ||
485 | for (i = 0; i < num_pages; i++) | |
07613ba2 | 486 | mem->pages[i] = pages[i]; |
673a394b EA |
487 | mem->page_count = num_pages; |
488 | ||
489 | mem->is_flushed = true; | |
490 | ret = drm_agp_bind_memory(mem, gtt_offset / PAGE_SIZE); | |
491 | if (ret != 0) { | |
492 | DRM_ERROR("Failed to bind AGP memory: %d\n", ret); | |
493 | agp_free_memory(mem); | |
494 | return NULL; | |
495 | } | |
496 | ||
497 | return mem; | |
498 | } | |
499 | EXPORT_SYMBOL(drm_agp_bind_pages); | |
500 | ||
501 | void drm_agp_chipset_flush(struct drm_device *dev) | |
502 | { | |
503 | agp_flush_chipset(dev->agp->bridge); | |
504 | } | |
505 | EXPORT_SYMBOL(drm_agp_chipset_flush); | |
506 | ||
507 | #endif /* __OS_HAS_AGP */ |