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Commit | Line | Data |
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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 | 38 | |
1bb88edb EA |
39 | #include <asm/agp.h> |
40 | ||
1da177e4 | 41 | /** |
7ab98401 | 42 | * Get AGP information. |
1da177e4 LT |
43 | * |
44 | * \param inode device inode. | |
6c340eac | 45 | * \param file_priv DRM file private. |
1da177e4 LT |
46 | * \param cmd command. |
47 | * \param arg pointer to a (output) drm_agp_info structure. | |
48 | * \return zero on success or a negative number on failure. | |
49 | * | |
50 | * Verifies the AGP device has been initialized and acquired and fills in the | |
51 | * drm_agp_info structure with the information in drm_agp_head::agp_info. | |
52 | */ | |
84b1fd10 | 53 | int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info) |
1da177e4 | 54 | { |
d2e546b8 | 55 | struct agp_kern_info *kern; |
1da177e4 LT |
56 | |
57 | if (!dev->agp || !dev->agp->acquired) | |
58 | return -EINVAL; | |
59 | ||
b5e89ed5 | 60 | kern = &dev->agp->agp_info; |
7ab98401 DA |
61 | info->agp_version_major = kern->version.major; |
62 | info->agp_version_minor = kern->version.minor; | |
b5e89ed5 DA |
63 | info->mode = kern->mode; |
64 | info->aperture_base = kern->aper_base; | |
65 | info->aperture_size = kern->aper_size * 1024 * 1024; | |
66 | info->memory_allowed = kern->max_memory << PAGE_SHIFT; | |
67 | info->memory_used = kern->current_memory << PAGE_SHIFT; | |
68 | info->id_vendor = kern->device->vendor; | |
69 | info->id_device = kern->device->device; | |
7ab98401 DA |
70 | |
71 | return 0; | |
72 | } | |
73 | EXPORT_SYMBOL(drm_agp_info); | |
74 | ||
c153f45f EA |
75 | int drm_agp_info_ioctl(struct drm_device *dev, void *data, |
76 | struct drm_file *file_priv) | |
7ab98401 | 77 | { |
c153f45f | 78 | struct drm_agp_info *info = data; |
7ab98401 DA |
79 | int err; |
80 | ||
c153f45f | 81 | err = drm_agp_info(dev, info); |
7ab98401 DA |
82 | if (err) |
83 | return err; | |
b5e89ed5 | 84 | |
1da177e4 LT |
85 | return 0; |
86 | } | |
87 | ||
88 | /** | |
7ab98401 | 89 | * Acquire the AGP device. |
1da177e4 | 90 | * |
d985c108 | 91 | * \param dev DRM device that is to acquire AGP. |
b5e89ed5 | 92 | * \return zero on success or a negative number on failure. |
1da177e4 LT |
93 | * |
94 | * Verifies the AGP device hasn't been acquired before and calls | |
7ab98401 | 95 | * \c agp_backend_acquire. |
1da177e4 | 96 | */ |
e3cbeaf8 | 97 | int drm_agp_acquire(struct drm_device *dev) |
1da177e4 | 98 | { |
1da177e4 LT |
99 | if (!dev->agp) |
100 | return -ENODEV; | |
101 | if (dev->agp->acquired) | |
102 | return -EBUSY; | |
182e61d1 MM |
103 | dev->agp->bridge = agp_backend_acquire(dev->pdev); |
104 | if (!dev->agp->bridge) | |
1da177e4 LT |
105 | return -ENODEV; |
106 | dev->agp->acquired = 1; | |
107 | return 0; | |
108 | } | |
7ab98401 | 109 | EXPORT_SYMBOL(drm_agp_acquire); |
1da177e4 LT |
110 | |
111 | /** | |
7ab98401 | 112 | * Acquire the AGP device (ioctl). |
1da177e4 LT |
113 | * |
114 | * \param inode device inode. | |
6c340eac | 115 | * \param file_priv DRM file private. |
1da177e4 LT |
116 | * \param cmd command. |
117 | * \param arg user argument. | |
118 | * \return zero on success or a negative number on failure. | |
119 | * | |
7ab98401 DA |
120 | * Verifies the AGP device hasn't been acquired before and calls |
121 | * \c agp_backend_acquire. | |
1da177e4 | 122 | */ |
c153f45f EA |
123 | int drm_agp_acquire_ioctl(struct drm_device *dev, void *data, |
124 | struct drm_file *file_priv) | |
1da177e4 | 125 | { |
2c14f28b | 126 | return drm_agp_acquire((struct drm_device *) file_priv->minor->dev); |
7ab98401 | 127 | } |
1da177e4 | 128 | |
7ab98401 DA |
129 | /** |
130 | * Release the AGP device. | |
131 | * | |
d985c108 | 132 | * \param dev DRM device that is to release AGP. |
7ab98401 DA |
133 | * \return zero on success or a negative number on failure. |
134 | * | |
135 | * Verifies the AGP device has been acquired and calls \c agp_backend_release. | |
136 | */ | |
e3cbeaf8 | 137 | int drm_agp_release(struct drm_device *dev) |
7ab98401 | 138 | { |
1da177e4 LT |
139 | if (!dev->agp || !dev->agp->acquired) |
140 | return -EINVAL; | |
141 | agp_backend_release(dev->agp->bridge); | |
142 | dev->agp->acquired = 0; | |
143 | return 0; | |
1da177e4 | 144 | } |
7ab98401 | 145 | EXPORT_SYMBOL(drm_agp_release); |
1da177e4 | 146 | |
c153f45f EA |
147 | int drm_agp_release_ioctl(struct drm_device *dev, void *data, |
148 | struct drm_file *file_priv) | |
1da177e4 | 149 | { |
7ab98401 | 150 | return drm_agp_release(dev); |
1da177e4 LT |
151 | } |
152 | ||
153 | /** | |
154 | * Enable the AGP bus. | |
b5e89ed5 | 155 | * |
7ab98401 DA |
156 | * \param dev DRM device that has previously acquired AGP. |
157 | * \param mode Requested AGP mode. | |
1da177e4 LT |
158 | * \return zero on success or a negative number on failure. |
159 | * | |
160 | * Verifies the AGP device has been acquired but not enabled, and calls | |
7ab98401 | 161 | * \c agp_enable. |
1da177e4 | 162 | */ |
e3cbeaf8 | 163 | int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode) |
1da177e4 | 164 | { |
1da177e4 LT |
165 | if (!dev->agp || !dev->agp->acquired) |
166 | return -EINVAL; | |
167 | ||
b5e89ed5 | 168 | dev->agp->mode = mode.mode; |
1da177e4 | 169 | agp_enable(dev->agp->bridge, mode.mode); |
1da177e4 LT |
170 | dev->agp->enabled = 1; |
171 | return 0; | |
172 | } | |
7ab98401 DA |
173 | EXPORT_SYMBOL(drm_agp_enable); |
174 | ||
c153f45f EA |
175 | int drm_agp_enable_ioctl(struct drm_device *dev, void *data, |
176 | struct drm_file *file_priv) | |
7ab98401 | 177 | { |
c153f45f | 178 | struct drm_agp_mode *mode = data; |
7ab98401 | 179 | |
c153f45f | 180 | return drm_agp_enable(dev, *mode); |
7ab98401 | 181 | } |
1da177e4 LT |
182 | |
183 | /** | |
184 | * Allocate AGP memory. | |
185 | * | |
186 | * \param inode device inode. | |
6c340eac | 187 | * \param file_priv file private pointer. |
1da177e4 LT |
188 | * \param cmd command. |
189 | * \param arg pointer to a drm_agp_buffer structure. | |
190 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 191 | * |
1da177e4 | 192 | * Verifies the AGP device is present and has been acquired, allocates the |
89c37264 | 193 | * memory via agp_allocate_memory() and creates a drm_agp_mem entry for it. |
1da177e4 | 194 | */ |
84b1fd10 | 195 | int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request) |
1da177e4 | 196 | { |
55910517 | 197 | struct drm_agp_mem *entry; |
d2e546b8 | 198 | struct agp_memory *memory; |
b5e89ed5 DA |
199 | unsigned long pages; |
200 | u32 type; | |
1da177e4 LT |
201 | |
202 | if (!dev->agp || !dev->agp->acquired) | |
203 | return -EINVAL; | |
182e61d1 MM |
204 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
205 | if (!entry) | |
1da177e4 LT |
206 | return -ENOMEM; |
207 | ||
efa58395 DA |
208 | pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; |
209 | type = (u32) request->type; | |
182e61d1 MM |
210 | memory = agp_allocate_memory(dev->agp->bridge, pages, type); |
211 | if (!memory) { | |
9a298b2a | 212 | kfree(entry); |
1da177e4 LT |
213 | return -ENOMEM; |
214 | } | |
215 | ||
b5e89ed5 DA |
216 | entry->handle = (unsigned long)memory->key + 1; |
217 | entry->memory = memory; | |
218 | entry->bound = 0; | |
219 | entry->pages = pages; | |
bd1b331f | 220 | list_add(&entry->head, &dev->agp->memory); |
1da177e4 | 221 | |
efa58395 DA |
222 | request->handle = entry->handle; |
223 | request->physical = memory->physical; | |
224 | ||
225 | return 0; | |
226 | } | |
227 | EXPORT_SYMBOL(drm_agp_alloc); | |
228 | ||
efa58395 | 229 | |
c153f45f EA |
230 | int drm_agp_alloc_ioctl(struct drm_device *dev, void *data, |
231 | struct drm_file *file_priv) | |
232 | { | |
233 | struct drm_agp_buffer *request = data; | |
efa58395 | 234 | |
c153f45f | 235 | return drm_agp_alloc(dev, request); |
1da177e4 LT |
236 | } |
237 | ||
238 | /** | |
239 | * Search for the AGP memory entry associated with a handle. | |
240 | * | |
241 | * \param dev DRM device structure. | |
242 | * \param handle AGP memory handle. | |
243 | * \return pointer to the drm_agp_mem structure associated with \p handle. | |
b5e89ed5 | 244 | * |
1da177e4 LT |
245 | * Walks through drm_agp_head::memory until finding a matching handle. |
246 | */ | |
e3cbeaf8 MM |
247 | static struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device *dev, |
248 | unsigned long handle) | |
1da177e4 | 249 | { |
55910517 | 250 | struct drm_agp_mem *entry; |
1da177e4 | 251 | |
bd1b331f | 252 | list_for_each_entry(entry, &dev->agp->memory, head) { |
1da177e4 LT |
253 | if (entry->handle == handle) |
254 | return entry; | |
255 | } | |
256 | return NULL; | |
257 | } | |
258 | ||
259 | /** | |
260 | * Unbind AGP memory from the GATT (ioctl). | |
261 | * | |
262 | * \param inode device inode. | |
6c340eac | 263 | * \param file_priv DRM file private. |
1da177e4 LT |
264 | * \param cmd command. |
265 | * \param arg pointer to a drm_agp_binding structure. | |
266 | * \return zero on success or a negative number on failure. | |
267 | * | |
268 | * Verifies the AGP device is present and acquired, looks-up the AGP memory | |
269 | * entry and passes it to the unbind_agp() function. | |
270 | */ | |
84b1fd10 | 271 | int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request) |
1da177e4 | 272 | { |
55910517 | 273 | struct drm_agp_mem *entry; |
1da177e4 LT |
274 | int ret; |
275 | ||
276 | if (!dev->agp || !dev->agp->acquired) | |
277 | return -EINVAL; | |
182e61d1 MM |
278 | entry = drm_agp_lookup_entry(dev, request->handle); |
279 | if (!entry || !entry->bound) | |
1da177e4 LT |
280 | return -EINVAL; |
281 | ret = drm_unbind_agp(entry->memory); | |
282 | if (ret == 0) | |
b5e89ed5 | 283 | entry->bound = 0; |
1da177e4 LT |
284 | return ret; |
285 | } | |
efa58395 DA |
286 | EXPORT_SYMBOL(drm_agp_unbind); |
287 | ||
efa58395 | 288 | |
c153f45f EA |
289 | int drm_agp_unbind_ioctl(struct drm_device *dev, void *data, |
290 | struct drm_file *file_priv) | |
291 | { | |
292 | struct drm_agp_binding *request = data; | |
efa58395 | 293 | |
c153f45f | 294 | return drm_agp_unbind(dev, request); |
efa58395 | 295 | } |
1da177e4 LT |
296 | |
297 | /** | |
298 | * Bind AGP memory into the GATT (ioctl) | |
299 | * | |
300 | * \param inode device inode. | |
6c340eac | 301 | * \param file_priv DRM file private. |
1da177e4 LT |
302 | * \param cmd command. |
303 | * \param arg pointer to a drm_agp_binding structure. | |
304 | * \return zero on success or a negative number on failure. | |
305 | * | |
306 | * Verifies the AGP device is present and has been acquired and that no memory | |
307 | * is currently bound into the GATT. Looks-up the AGP memory entry and passes | |
308 | * it to bind_agp() function. | |
309 | */ | |
84b1fd10 | 310 | int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request) |
1da177e4 | 311 | { |
55910517 | 312 | struct drm_agp_mem *entry; |
b5e89ed5 DA |
313 | int retcode; |
314 | int page; | |
1da177e4 LT |
315 | |
316 | if (!dev->agp || !dev->agp->acquired) | |
317 | return -EINVAL; | |
182e61d1 MM |
318 | entry = drm_agp_lookup_entry(dev, request->handle); |
319 | if (!entry || entry->bound) | |
1da177e4 | 320 | return -EINVAL; |
efa58395 | 321 | page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; |
182e61d1 MM |
322 | retcode = drm_bind_agp(entry->memory, page); |
323 | if (retcode) | |
1da177e4 LT |
324 | return retcode; |
325 | entry->bound = dev->agp->base + (page << PAGE_SHIFT); | |
326 | DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n", | |
327 | dev->agp->base, entry->bound); | |
328 | return 0; | |
329 | } | |
efa58395 DA |
330 | EXPORT_SYMBOL(drm_agp_bind); |
331 | ||
efa58395 | 332 | |
c153f45f EA |
333 | int drm_agp_bind_ioctl(struct drm_device *dev, void *data, |
334 | struct drm_file *file_priv) | |
335 | { | |
336 | struct drm_agp_binding *request = data; | |
efa58395 | 337 | |
c153f45f | 338 | return drm_agp_bind(dev, request); |
efa58395 | 339 | } |
1da177e4 LT |
340 | |
341 | /** | |
342 | * Free AGP memory (ioctl). | |
343 | * | |
344 | * \param inode device inode. | |
6c340eac | 345 | * \param file_priv DRM file private. |
1da177e4 LT |
346 | * \param cmd command. |
347 | * \param arg pointer to a drm_agp_buffer structure. | |
348 | * \return zero on success or a negative number on failure. | |
349 | * | |
350 | * Verifies the AGP device is present and has been acquired and looks up the | |
351 | * AGP memory entry. If the memory it's currently bound, unbind it via | |
352 | * unbind_agp(). Frees it via free_agp() as well as the entry itself | |
353 | * and unlinks from the doubly linked list it's inserted in. | |
354 | */ | |
84b1fd10 | 355 | int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request) |
1da177e4 | 356 | { |
55910517 | 357 | struct drm_agp_mem *entry; |
1da177e4 LT |
358 | |
359 | if (!dev->agp || !dev->agp->acquired) | |
360 | return -EINVAL; | |
182e61d1 MM |
361 | entry = drm_agp_lookup_entry(dev, request->handle); |
362 | if (!entry) | |
1da177e4 LT |
363 | return -EINVAL; |
364 | if (entry->bound) | |
365 | drm_unbind_agp(entry->memory); | |
366 | ||
bd1b331f | 367 | list_del(&entry->head); |
1da177e4 LT |
368 | |
369 | drm_free_agp(entry->memory, entry->pages); | |
9a298b2a | 370 | kfree(entry); |
1da177e4 LT |
371 | return 0; |
372 | } | |
efa58395 DA |
373 | EXPORT_SYMBOL(drm_agp_free); |
374 | ||
efa58395 | 375 | |
c153f45f EA |
376 | int drm_agp_free_ioctl(struct drm_device *dev, void *data, |
377 | struct drm_file *file_priv) | |
378 | { | |
379 | struct drm_agp_buffer *request = data; | |
380 | ||
381 | return drm_agp_free(dev, request); | |
efa58395 | 382 | } |
1da177e4 LT |
383 | |
384 | /** | |
385 | * Initialize the AGP resources. | |
386 | * | |
387 | * \return pointer to a drm_agp_head structure. | |
388 | * | |
d985c108 DA |
389 | * Gets the drm_agp_t structure which is made available by the agpgart module |
390 | * via the inter_module_* functions. Creates and initializes a drm_agp_head | |
391 | * structure. | |
d6e4b28b DV |
392 | * |
393 | * Note that final cleanup of the kmalloced structure is directly done in | |
394 | * drm_pci_agp_destroy. | |
1da177e4 | 395 | */ |
55910517 | 396 | struct drm_agp_head *drm_agp_init(struct drm_device *dev) |
1da177e4 | 397 | { |
55910517 | 398 | struct drm_agp_head *head = NULL; |
1da177e4 | 399 | |
182e61d1 MM |
400 | head = kzalloc(sizeof(*head), GFP_KERNEL); |
401 | if (!head) | |
1da177e4 | 402 | return NULL; |
1da177e4 LT |
403 | head->bridge = agp_find_bridge(dev->pdev); |
404 | if (!head->bridge) { | |
182e61d1 MM |
405 | head->bridge = agp_backend_acquire(dev->pdev); |
406 | if (!head->bridge) { | |
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 | } | |
49d66d8d DV |
425 | /* Only exported for i810.ko */ |
426 | EXPORT_SYMBOL(drm_agp_init); | |
1da177e4 | 427 | |
28ec711c | 428 | /** |
366884b1 | 429 | * drm_legacy_agp_clear - Clear AGP resource list |
28ec711c DH |
430 | * @dev: DRM device |
431 | * | |
432 | * Iterate over all AGP resources and remove them. But keep the AGP head | |
433 | * intact so it can still be used. It is safe to call this if AGP is disabled or | |
434 | * was already removed. | |
435 | * | |
fa538645 | 436 | * Cleanup is only done for drivers who have DRIVER_LEGACY set. |
28ec711c | 437 | */ |
366884b1 | 438 | void drm_legacy_agp_clear(struct drm_device *dev) |
28ec711c DH |
439 | { |
440 | struct drm_agp_mem *entry, *tempe; | |
441 | ||
d9906753 | 442 | if (!dev->agp) |
28ec711c | 443 | return; |
fa538645 | 444 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
28ec711c DH |
445 | return; |
446 | ||
447 | list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) { | |
448 | if (entry->bound) | |
449 | drm_unbind_agp(entry->memory); | |
450 | drm_free_agp(entry->memory, entry->pages); | |
451 | kfree(entry); | |
452 | } | |
453 | INIT_LIST_HEAD(&dev->agp->memory); | |
454 | ||
455 | if (dev->agp->acquired) | |
456 | drm_agp_release(dev); | |
457 | ||
458 | dev->agp->acquired = 0; | |
459 | dev->agp->enabled = 0; | |
460 | } | |
461 | ||
673a394b EA |
462 | /** |
463 | * Binds a collection of pages into AGP memory at the given offset, returning | |
464 | * the AGP memory structure containing them. | |
465 | * | |
466 | * No reference is held on the pages during this time -- it is up to the | |
467 | * caller to handle that. | |
468 | */ | |
d2e546b8 | 469 | struct agp_memory * |
673a394b EA |
470 | drm_agp_bind_pages(struct drm_device *dev, |
471 | struct page **pages, | |
472 | unsigned long num_pages, | |
ba1eb1d8 KP |
473 | uint32_t gtt_offset, |
474 | u32 type) | |
673a394b | 475 | { |
d2e546b8 | 476 | struct agp_memory *mem; |
673a394b EA |
477 | int ret, i; |
478 | ||
479 | DRM_DEBUG("\n"); | |
480 | ||
89c37264 | 481 | mem = agp_allocate_memory(dev->agp->bridge, num_pages, |
ba1eb1d8 | 482 | type); |
673a394b EA |
483 | if (mem == NULL) { |
484 | DRM_ERROR("Failed to allocate memory for %ld pages\n", | |
485 | num_pages); | |
486 | return NULL; | |
487 | } | |
488 | ||
489 | for (i = 0; i < num_pages; i++) | |
07613ba2 | 490 | mem->pages[i] = pages[i]; |
673a394b EA |
491 | mem->page_count = num_pages; |
492 | ||
493 | mem->is_flushed = true; | |
89c37264 | 494 | ret = agp_bind_memory(mem, gtt_offset / PAGE_SIZE); |
673a394b EA |
495 | if (ret != 0) { |
496 | DRM_ERROR("Failed to bind AGP memory: %d\n", ret); | |
497 | agp_free_memory(mem); | |
498 | return NULL; | |
499 | } | |
500 | ||
501 | return mem; | |
502 | } | |
503 | EXPORT_SYMBOL(drm_agp_bind_pages); |