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 | ||
760285e7 | 34 | #include <drm/drmP.h> |
1da177e4 | 35 | #include <linux/module.h> |
5a0e3ad6 | 36 | #include <linux/slab.h> |
cc5ea594 | 37 | #include "drm_legacy.h" |
1da177e4 LT |
38 | |
39 | #if __OS_HAS_AGP | |
40 | ||
1bb88edb EA |
41 | #include <asm/agp.h> |
42 | ||
1da177e4 | 43 | /** |
7ab98401 | 44 | * Get AGP information. |
1da177e4 LT |
45 | * |
46 | * \param inode device inode. | |
6c340eac | 47 | * \param file_priv DRM file private. |
1da177e4 LT |
48 | * \param cmd command. |
49 | * \param arg pointer to a (output) drm_agp_info structure. | |
50 | * \return zero on success or a negative number on failure. | |
51 | * | |
52 | * Verifies the AGP device has been initialized and acquired and fills in the | |
53 | * drm_agp_info structure with the information in drm_agp_head::agp_info. | |
54 | */ | |
84b1fd10 | 55 | int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info) |
1da177e4 | 56 | { |
d2e546b8 | 57 | struct agp_kern_info *kern; |
1da177e4 LT |
58 | |
59 | if (!dev->agp || !dev->agp->acquired) | |
60 | return -EINVAL; | |
61 | ||
b5e89ed5 | 62 | kern = &dev->agp->agp_info; |
7ab98401 DA |
63 | info->agp_version_major = kern->version.major; |
64 | info->agp_version_minor = kern->version.minor; | |
b5e89ed5 DA |
65 | info->mode = kern->mode; |
66 | info->aperture_base = kern->aper_base; | |
67 | info->aperture_size = kern->aper_size * 1024 * 1024; | |
68 | info->memory_allowed = kern->max_memory << PAGE_SHIFT; | |
69 | info->memory_used = kern->current_memory << PAGE_SHIFT; | |
70 | info->id_vendor = kern->device->vendor; | |
71 | info->id_device = kern->device->device; | |
7ab98401 DA |
72 | |
73 | return 0; | |
74 | } | |
b5e89ed5 | 75 | |
7ab98401 DA |
76 | EXPORT_SYMBOL(drm_agp_info); |
77 | ||
c153f45f EA |
78 | int drm_agp_info_ioctl(struct drm_device *dev, void *data, |
79 | struct drm_file *file_priv) | |
7ab98401 | 80 | { |
c153f45f | 81 | struct drm_agp_info *info = data; |
7ab98401 DA |
82 | int err; |
83 | ||
c153f45f | 84 | err = drm_agp_info(dev, info); |
7ab98401 DA |
85 | if (err) |
86 | return err; | |
b5e89ed5 | 87 | |
1da177e4 LT |
88 | return 0; |
89 | } | |
90 | ||
91 | /** | |
7ab98401 | 92 | * Acquire the AGP device. |
1da177e4 | 93 | * |
d985c108 | 94 | * \param dev DRM device that is to acquire AGP. |
b5e89ed5 | 95 | * \return zero on success or a negative number on failure. |
1da177e4 LT |
96 | * |
97 | * Verifies the AGP device hasn't been acquired before and calls | |
7ab98401 | 98 | * \c agp_backend_acquire. |
1da177e4 | 99 | */ |
84b1fd10 | 100 | int drm_agp_acquire(struct drm_device * dev) |
1da177e4 | 101 | { |
1da177e4 LT |
102 | if (!dev->agp) |
103 | return -ENODEV; | |
104 | if (dev->agp->acquired) | |
105 | return -EBUSY; | |
106 | if (!(dev->agp->bridge = agp_backend_acquire(dev->pdev))) | |
107 | return -ENODEV; | |
108 | dev->agp->acquired = 1; | |
109 | return 0; | |
110 | } | |
b5e89ed5 | 111 | |
7ab98401 | 112 | EXPORT_SYMBOL(drm_agp_acquire); |
1da177e4 LT |
113 | |
114 | /** | |
7ab98401 | 115 | * Acquire the AGP device (ioctl). |
1da177e4 LT |
116 | * |
117 | * \param inode device inode. | |
6c340eac | 118 | * \param file_priv DRM file private. |
1da177e4 LT |
119 | * \param cmd command. |
120 | * \param arg user argument. | |
121 | * \return zero on success or a negative number on failure. | |
122 | * | |
7ab98401 DA |
123 | * Verifies the AGP device hasn't been acquired before and calls |
124 | * \c agp_backend_acquire. | |
1da177e4 | 125 | */ |
c153f45f EA |
126 | int drm_agp_acquire_ioctl(struct drm_device *dev, void *data, |
127 | struct drm_file *file_priv) | |
1da177e4 | 128 | { |
2c14f28b | 129 | return drm_agp_acquire((struct drm_device *) file_priv->minor->dev); |
7ab98401 | 130 | } |
1da177e4 | 131 | |
7ab98401 DA |
132 | /** |
133 | * Release the AGP device. | |
134 | * | |
d985c108 | 135 | * \param dev DRM device that is to release AGP. |
7ab98401 DA |
136 | * \return zero on success or a negative number on failure. |
137 | * | |
138 | * Verifies the AGP device has been acquired and calls \c agp_backend_release. | |
139 | */ | |
84b1fd10 | 140 | int drm_agp_release(struct drm_device * dev) |
7ab98401 | 141 | { |
1da177e4 LT |
142 | if (!dev->agp || !dev->agp->acquired) |
143 | return -EINVAL; | |
144 | agp_backend_release(dev->agp->bridge); | |
145 | dev->agp->acquired = 0; | |
146 | return 0; | |
1da177e4 | 147 | } |
7ab98401 | 148 | EXPORT_SYMBOL(drm_agp_release); |
1da177e4 | 149 | |
c153f45f EA |
150 | int drm_agp_release_ioctl(struct drm_device *dev, void *data, |
151 | struct drm_file *file_priv) | |
1da177e4 | 152 | { |
7ab98401 | 153 | return drm_agp_release(dev); |
1da177e4 LT |
154 | } |
155 | ||
156 | /** | |
157 | * Enable the AGP bus. | |
b5e89ed5 | 158 | * |
7ab98401 DA |
159 | * \param dev DRM device that has previously acquired AGP. |
160 | * \param mode Requested AGP mode. | |
1da177e4 LT |
161 | * \return zero on success or a negative number on failure. |
162 | * | |
163 | * Verifies the AGP device has been acquired but not enabled, and calls | |
7ab98401 | 164 | * \c agp_enable. |
1da177e4 | 165 | */ |
84b1fd10 | 166 | int drm_agp_enable(struct drm_device * dev, struct drm_agp_mode mode) |
1da177e4 | 167 | { |
1da177e4 LT |
168 | if (!dev->agp || !dev->agp->acquired) |
169 | return -EINVAL; | |
170 | ||
b5e89ed5 | 171 | dev->agp->mode = mode.mode; |
1da177e4 | 172 | agp_enable(dev->agp->bridge, mode.mode); |
1da177e4 LT |
173 | dev->agp->enabled = 1; |
174 | return 0; | |
175 | } | |
b5e89ed5 | 176 | |
7ab98401 DA |
177 | EXPORT_SYMBOL(drm_agp_enable); |
178 | ||
c153f45f EA |
179 | int drm_agp_enable_ioctl(struct drm_device *dev, void *data, |
180 | struct drm_file *file_priv) | |
7ab98401 | 181 | { |
c153f45f | 182 | struct drm_agp_mode *mode = data; |
7ab98401 | 183 | |
c153f45f | 184 | return drm_agp_enable(dev, *mode); |
7ab98401 | 185 | } |
1da177e4 LT |
186 | |
187 | /** | |
188 | * Allocate AGP memory. | |
189 | * | |
190 | * \param inode device inode. | |
6c340eac | 191 | * \param file_priv file private pointer. |
1da177e4 LT |
192 | * \param cmd command. |
193 | * \param arg pointer to a drm_agp_buffer structure. | |
194 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 195 | * |
1da177e4 | 196 | * Verifies the AGP device is present and has been acquired, allocates the |
89c37264 | 197 | * memory via agp_allocate_memory() and creates a drm_agp_mem entry for it. |
1da177e4 | 198 | */ |
84b1fd10 | 199 | int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request) |
1da177e4 | 200 | { |
55910517 | 201 | struct drm_agp_mem *entry; |
d2e546b8 | 202 | struct agp_memory *memory; |
b5e89ed5 DA |
203 | unsigned long pages; |
204 | u32 type; | |
1da177e4 LT |
205 | |
206 | if (!dev->agp || !dev->agp->acquired) | |
207 | return -EINVAL; | |
d5e41ad3 | 208 | if (!(entry = kzalloc(sizeof(*entry), GFP_KERNEL))) |
1da177e4 LT |
209 | return -ENOMEM; |
210 | ||
efa58395 DA |
211 | pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; |
212 | type = (u32) request->type; | |
89c37264 | 213 | if (!(memory = agp_allocate_memory(dev->agp->bridge, pages, type))) { |
9a298b2a | 214 | kfree(entry); |
1da177e4 LT |
215 | return -ENOMEM; |
216 | } | |
217 | ||
b5e89ed5 DA |
218 | entry->handle = (unsigned long)memory->key + 1; |
219 | entry->memory = memory; | |
220 | entry->bound = 0; | |
221 | entry->pages = pages; | |
bd1b331f | 222 | list_add(&entry->head, &dev->agp->memory); |
1da177e4 | 223 | |
efa58395 DA |
224 | request->handle = entry->handle; |
225 | request->physical = memory->physical; | |
226 | ||
227 | return 0; | |
228 | } | |
229 | EXPORT_SYMBOL(drm_agp_alloc); | |
230 | ||
efa58395 | 231 | |
c153f45f EA |
232 | int drm_agp_alloc_ioctl(struct drm_device *dev, void *data, |
233 | struct drm_file *file_priv) | |
234 | { | |
235 | struct drm_agp_buffer *request = data; | |
efa58395 | 236 | |
c153f45f | 237 | return drm_agp_alloc(dev, request); |
1da177e4 LT |
238 | } |
239 | ||
240 | /** | |
241 | * Search for the AGP memory entry associated with a handle. | |
242 | * | |
243 | * \param dev DRM device structure. | |
244 | * \param handle AGP memory handle. | |
245 | * \return pointer to the drm_agp_mem structure associated with \p handle. | |
b5e89ed5 | 246 | * |
1da177e4 LT |
247 | * Walks through drm_agp_head::memory until finding a matching handle. |
248 | */ | |
55910517 | 249 | static struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device * dev, |
b5e89ed5 | 250 | unsigned long handle) |
1da177e4 | 251 | { |
55910517 | 252 | struct drm_agp_mem *entry; |
1da177e4 | 253 | |
bd1b331f | 254 | list_for_each_entry(entry, &dev->agp->memory, head) { |
1da177e4 LT |
255 | if (entry->handle == handle) |
256 | return entry; | |
257 | } | |
258 | return NULL; | |
259 | } | |
260 | ||
261 | /** | |
262 | * Unbind AGP memory from the GATT (ioctl). | |
263 | * | |
264 | * \param inode device inode. | |
6c340eac | 265 | * \param file_priv DRM file private. |
1da177e4 LT |
266 | * \param cmd command. |
267 | * \param arg pointer to a drm_agp_binding structure. | |
268 | * \return zero on success or a negative number on failure. | |
269 | * | |
270 | * Verifies the AGP device is present and acquired, looks-up the AGP memory | |
271 | * entry and passes it to the unbind_agp() function. | |
272 | */ | |
84b1fd10 | 273 | int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request) |
1da177e4 | 274 | { |
55910517 | 275 | struct drm_agp_mem *entry; |
1da177e4 LT |
276 | int ret; |
277 | ||
278 | if (!dev->agp || !dev->agp->acquired) | |
279 | return -EINVAL; | |
efa58395 | 280 | if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
1da177e4 LT |
281 | return -EINVAL; |
282 | if (!entry->bound) | |
283 | return -EINVAL; | |
284 | ret = drm_unbind_agp(entry->memory); | |
285 | if (ret == 0) | |
b5e89ed5 | 286 | entry->bound = 0; |
1da177e4 LT |
287 | return ret; |
288 | } | |
efa58395 DA |
289 | EXPORT_SYMBOL(drm_agp_unbind); |
290 | ||
efa58395 | 291 | |
c153f45f EA |
292 | int drm_agp_unbind_ioctl(struct drm_device *dev, void *data, |
293 | struct drm_file *file_priv) | |
294 | { | |
295 | struct drm_agp_binding *request = data; | |
efa58395 | 296 | |
c153f45f | 297 | return drm_agp_unbind(dev, request); |
efa58395 | 298 | } |
1da177e4 LT |
299 | |
300 | /** | |
301 | * Bind AGP memory into the GATT (ioctl) | |
302 | * | |
303 | * \param inode device inode. | |
6c340eac | 304 | * \param file_priv DRM file private. |
1da177e4 LT |
305 | * \param cmd command. |
306 | * \param arg pointer to a drm_agp_binding structure. | |
307 | * \return zero on success or a negative number on failure. | |
308 | * | |
309 | * Verifies the AGP device is present and has been acquired and that no memory | |
310 | * is currently bound into the GATT. Looks-up the AGP memory entry and passes | |
311 | * it to bind_agp() function. | |
312 | */ | |
84b1fd10 | 313 | int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request) |
1da177e4 | 314 | { |
55910517 | 315 | struct drm_agp_mem *entry; |
b5e89ed5 DA |
316 | int retcode; |
317 | int page; | |
1da177e4 LT |
318 | |
319 | if (!dev->agp || !dev->agp->acquired) | |
320 | return -EINVAL; | |
efa58395 | 321 | if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
1da177e4 LT |
322 | return -EINVAL; |
323 | if (entry->bound) | |
324 | return -EINVAL; | |
efa58395 | 325 | page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; |
1da177e4 LT |
326 | if ((retcode = drm_bind_agp(entry->memory, page))) |
327 | return retcode; | |
328 | entry->bound = dev->agp->base + (page << PAGE_SHIFT); | |
329 | DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n", | |
330 | dev->agp->base, entry->bound); | |
331 | return 0; | |
332 | } | |
efa58395 DA |
333 | EXPORT_SYMBOL(drm_agp_bind); |
334 | ||
efa58395 | 335 | |
c153f45f EA |
336 | int drm_agp_bind_ioctl(struct drm_device *dev, void *data, |
337 | struct drm_file *file_priv) | |
338 | { | |
339 | struct drm_agp_binding *request = data; | |
efa58395 | 340 | |
c153f45f | 341 | return drm_agp_bind(dev, request); |
efa58395 | 342 | } |
1da177e4 LT |
343 | |
344 | /** | |
345 | * Free AGP memory (ioctl). | |
346 | * | |
347 | * \param inode device inode. | |
6c340eac | 348 | * \param file_priv DRM file private. |
1da177e4 LT |
349 | * \param cmd command. |
350 | * \param arg pointer to a drm_agp_buffer structure. | |
351 | * \return zero on success or a negative number on failure. | |
352 | * | |
353 | * Verifies the AGP device is present and has been acquired and looks up the | |
354 | * AGP memory entry. If the memory it's currently bound, unbind it via | |
355 | * unbind_agp(). Frees it via free_agp() as well as the entry itself | |
356 | * and unlinks from the doubly linked list it's inserted in. | |
357 | */ | |
84b1fd10 | 358 | int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request) |
1da177e4 | 359 | { |
55910517 | 360 | struct drm_agp_mem *entry; |
1da177e4 LT |
361 | |
362 | if (!dev->agp || !dev->agp->acquired) | |
363 | return -EINVAL; | |
efa58395 | 364 | if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
1da177e4 LT |
365 | return -EINVAL; |
366 | if (entry->bound) | |
367 | drm_unbind_agp(entry->memory); | |
368 | ||
bd1b331f | 369 | list_del(&entry->head); |
1da177e4 LT |
370 | |
371 | drm_free_agp(entry->memory, entry->pages); | |
9a298b2a | 372 | kfree(entry); |
1da177e4 LT |
373 | return 0; |
374 | } | |
efa58395 DA |
375 | EXPORT_SYMBOL(drm_agp_free); |
376 | ||
efa58395 | 377 | |
efa58395 | 378 | |
c153f45f EA |
379 | int drm_agp_free_ioctl(struct drm_device *dev, void *data, |
380 | struct drm_file *file_priv) | |
381 | { | |
382 | struct drm_agp_buffer *request = data; | |
383 | ||
384 | return drm_agp_free(dev, request); | |
efa58395 | 385 | } |
1da177e4 LT |
386 | |
387 | /** | |
388 | * Initialize the AGP resources. | |
389 | * | |
390 | * \return pointer to a drm_agp_head structure. | |
391 | * | |
d985c108 DA |
392 | * Gets the drm_agp_t structure which is made available by the agpgart module |
393 | * via the inter_module_* functions. Creates and initializes a drm_agp_head | |
394 | * structure. | |
d6e4b28b DV |
395 | * |
396 | * Note that final cleanup of the kmalloced structure is directly done in | |
397 | * drm_pci_agp_destroy. | |
1da177e4 | 398 | */ |
55910517 | 399 | struct drm_agp_head *drm_agp_init(struct drm_device *dev) |
1da177e4 | 400 | { |
55910517 | 401 | struct drm_agp_head *head = NULL; |
1da177e4 | 402 | |
d5e41ad3 | 403 | if (!(head = kzalloc(sizeof(*head), GFP_KERNEL))) |
1da177e4 | 404 | return NULL; |
1da177e4 LT |
405 | head->bridge = agp_find_bridge(dev->pdev); |
406 | if (!head->bridge) { | |
407 | if (!(head->bridge = agp_backend_acquire(dev->pdev))) { | |
9a298b2a | 408 | kfree(head); |
1da177e4 LT |
409 | return NULL; |
410 | } | |
411 | agp_copy_info(head->bridge, &head->agp_info); | |
412 | agp_backend_release(head->bridge); | |
413 | } else { | |
414 | agp_copy_info(head->bridge, &head->agp_info); | |
415 | } | |
416 | if (head->agp_info.chipset == NOT_SUPPORTED) { | |
9a298b2a | 417 | kfree(head); |
1da177e4 LT |
418 | return NULL; |
419 | } | |
bd1b331f | 420 | INIT_LIST_HEAD(&head->memory); |
1da177e4 LT |
421 | head->cant_use_aperture = head->agp_info.cant_use_aperture; |
422 | head->page_mask = head->agp_info.page_mask; | |
8b409580 | 423 | head->base = head->agp_info.aper_base; |
1da177e4 LT |
424 | return head; |
425 | } | |
426 | ||
28ec711c DH |
427 | /** |
428 | * drm_agp_clear - Clear AGP resource list | |
429 | * @dev: DRM device | |
430 | * | |
431 | * Iterate over all AGP resources and remove them. But keep the AGP head | |
432 | * intact so it can still be used. It is safe to call this if AGP is disabled or | |
433 | * was already removed. | |
434 | * | |
435 | * If DRIVER_MODESET is active, nothing is done to protect the modesetting | |
436 | * resources from getting destroyed. Drivers are responsible of cleaning them up | |
437 | * during device shutdown. | |
438 | */ | |
439 | void drm_agp_clear(struct drm_device *dev) | |
440 | { | |
441 | struct drm_agp_mem *entry, *tempe; | |
442 | ||
d9906753 | 443 | if (!dev->agp) |
28ec711c DH |
444 | return; |
445 | if (drm_core_check_feature(dev, DRIVER_MODESET)) | |
446 | return; | |
447 | ||
448 | list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) { | |
449 | if (entry->bound) | |
450 | drm_unbind_agp(entry->memory); | |
451 | drm_free_agp(entry->memory, entry->pages); | |
452 | kfree(entry); | |
453 | } | |
454 | INIT_LIST_HEAD(&dev->agp->memory); | |
455 | ||
456 | if (dev->agp->acquired) | |
457 | drm_agp_release(dev); | |
458 | ||
459 | dev->agp->acquired = 0; | |
460 | dev->agp->enabled = 0; | |
461 | } | |
462 | ||
673a394b EA |
463 | /** |
464 | * Binds a collection of pages into AGP memory at the given offset, returning | |
465 | * the AGP memory structure containing them. | |
466 | * | |
467 | * No reference is held on the pages during this time -- it is up to the | |
468 | * caller to handle that. | |
469 | */ | |
d2e546b8 | 470 | struct agp_memory * |
673a394b EA |
471 | drm_agp_bind_pages(struct drm_device *dev, |
472 | struct page **pages, | |
473 | unsigned long num_pages, | |
ba1eb1d8 KP |
474 | uint32_t gtt_offset, |
475 | u32 type) | |
673a394b | 476 | { |
d2e546b8 | 477 | struct agp_memory *mem; |
673a394b EA |
478 | int ret, i; |
479 | ||
480 | DRM_DEBUG("\n"); | |
481 | ||
89c37264 | 482 | mem = agp_allocate_memory(dev->agp->bridge, num_pages, |
ba1eb1d8 | 483 | type); |
673a394b EA |
484 | if (mem == NULL) { |
485 | DRM_ERROR("Failed to allocate memory for %ld pages\n", | |
486 | num_pages); | |
487 | return NULL; | |
488 | } | |
489 | ||
490 | for (i = 0; i < num_pages; i++) | |
07613ba2 | 491 | mem->pages[i] = pages[i]; |
673a394b EA |
492 | mem->page_count = num_pages; |
493 | ||
494 | mem->is_flushed = true; | |
89c37264 | 495 | ret = agp_bind_memory(mem, gtt_offset / PAGE_SIZE); |
673a394b EA |
496 | if (ret != 0) { |
497 | DRM_ERROR("Failed to bind AGP memory: %d\n", ret); | |
498 | agp_free_memory(mem); | |
499 | return NULL; | |
500 | } | |
501 | ||
502 | return mem; | |
503 | } | |
504 | EXPORT_SYMBOL(drm_agp_bind_pages); | |
505 | ||
673a394b | 506 | #endif /* __OS_HAS_AGP */ |