blob: 3d8fed1797972fdff1e449a70afcfcefb7dc4cde [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
Dave Airlied985c102006-01-02 21:32:48 +11002 * \file drm_agpsupport.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * DRM support for AGP/GART backend
Dave Airlieb5e89ed2005-09-25 14:28:13 +10004 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * \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
David Howells760285e2012-10-02 18:01:07 +010034#include <drm/drmP.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090036#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38#if __OS_HAS_AGP
39
Eric Anholt1bb88ed2009-01-15 01:16:25 -080040#include <asm/agp.h>
41
Linus Torvalds1da177e2005-04-16 15:20:36 -070042/**
Dave Airlie7ab98402005-07-10 16:56:52 +100043 * Get AGP information.
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 *
45 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +100046 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 * \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 */
Dave Airlie84b1fd12007-07-11 15:53:27 +100054int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -070055{
Dave Airlieb5e89ed2005-09-25 14:28:13 +100056 DRM_AGP_KERN *kern;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58 if (!dev->agp || !dev->agp->acquired)
59 return -EINVAL;
60
Dave Airlieb5e89ed2005-09-25 14:28:13 +100061 kern = &dev->agp->agp_info;
Dave Airlie7ab98402005-07-10 16:56:52 +100062 info->agp_version_major = kern->version.major;
63 info->agp_version_minor = kern->version.minor;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100064 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Dave Airlie7ab98402005-07-10 16:56:52 +100072 return 0;
73}
Dave Airlieb5e89ed2005-09-25 14:28:13 +100074
Dave Airlie7ab98402005-07-10 16:56:52 +100075EXPORT_SYMBOL(drm_agp_info);
76
Eric Anholtc153f452007-09-03 12:06:45 +100077int drm_agp_info_ioctl(struct drm_device *dev, void *data,
78 struct drm_file *file_priv)
Dave Airlie7ab98402005-07-10 16:56:52 +100079{
Eric Anholtc153f452007-09-03 12:06:45 +100080 struct drm_agp_info *info = data;
Dave Airlie7ab98402005-07-10 16:56:52 +100081 int err;
82
Eric Anholtc153f452007-09-03 12:06:45 +100083 err = drm_agp_info(dev, info);
Dave Airlie7ab98402005-07-10 16:56:52 +100084 if (err)
85 return err;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100086
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 return 0;
88}
89
90/**
Dave Airlie7ab98402005-07-10 16:56:52 +100091 * Acquire the AGP device.
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 *
Dave Airlied985c102006-01-02 21:32:48 +110093 * \param dev DRM device that is to acquire AGP.
Dave Airlieb5e89ed2005-09-25 14:28:13 +100094 * \return zero on success or a negative number on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 *
96 * Verifies the AGP device hasn't been acquired before and calls
Dave Airlie7ab98402005-07-10 16:56:52 +100097 * \c agp_backend_acquire.
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 */
Dave Airlie84b1fd12007-07-11 15:53:27 +100099int drm_agp_acquire(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 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}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000110
Dave Airlie7ab98402005-07-10 16:56:52 +1000111EXPORT_SYMBOL(drm_agp_acquire);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
113/**
Dave Airlie7ab98402005-07-10 16:56:52 +1000114 * Acquire the AGP device (ioctl).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 *
116 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000117 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 * \param cmd command.
119 * \param arg user argument.
120 * \return zero on success or a negative number on failure.
121 *
Dave Airlie7ab98402005-07-10 16:56:52 +1000122 * Verifies the AGP device hasn't been acquired before and calls
123 * \c agp_backend_acquire.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 */
Eric Anholtc153f452007-09-03 12:06:45 +1000125int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
126 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127{
Dave Airlie2c14f282008-04-21 16:47:32 +1000128 return drm_agp_acquire((struct drm_device *) file_priv->minor->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129}
130
131/**
132 * Release the AGP device.
133 *
Dave Airlied985c102006-01-02 21:32:48 +1100134 * \param dev DRM device that is to release AGP.
Dave Airlie7ab98402005-07-10 16:56:52 +1000135 * \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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000139int drm_agp_release(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140{
Dave Airlie7ab98402005-07-10 16:56:52 +1000141 if (!dev->agp || !dev->agp->acquired)
142 return -EINVAL;
143 agp_backend_release(dev->agp->bridge);
144 dev->agp->acquired = 0;
145 return 0;
146}
147EXPORT_SYMBOL(drm_agp_release);
148
Eric Anholtc153f452007-09-03 12:06:45 +1000149int drm_agp_release_ioctl(struct drm_device *dev, void *data,
150 struct drm_file *file_priv)
Dave Airlie7ab98402005-07-10 16:56:52 +1000151{
Dave Airlie7ab98402005-07-10 16:56:52 +1000152 return drm_agp_release(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153}
154
155/**
156 * Enable the AGP bus.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000157 *
Dave Airlie7ab98402005-07-10 16:56:52 +1000158 * \param dev DRM device that has previously acquired AGP.
159 * \param mode Requested AGP mode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 * \return zero on success or a negative number on failure.
161 *
162 * Verifies the AGP device has been acquired but not enabled, and calls
Dave Airlie7ab98402005-07-10 16:56:52 +1000163 * \c agp_enable.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000165int drm_agp_enable(struct drm_device * dev, struct drm_agp_mode mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 if (!dev->agp || !dev->agp->acquired)
168 return -EINVAL;
169
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000170 dev->agp->mode = mode.mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 agp_enable(dev->agp->bridge, mode.mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 dev->agp->enabled = 1;
173 return 0;
174}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000175
Dave Airlie7ab98402005-07-10 16:56:52 +1000176EXPORT_SYMBOL(drm_agp_enable);
177
Eric Anholtc153f452007-09-03 12:06:45 +1000178int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
179 struct drm_file *file_priv)
Dave Airlie7ab98402005-07-10 16:56:52 +1000180{
Eric Anholtc153f452007-09-03 12:06:45 +1000181 struct drm_agp_mode *mode = data;
Dave Airlie7ab98402005-07-10 16:56:52 +1000182
Eric Anholtc153f452007-09-03 12:06:45 +1000183 return drm_agp_enable(dev, *mode);
Dave Airlie7ab98402005-07-10 16:56:52 +1000184}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
186/**
187 * Allocate AGP memory.
188 *
189 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000190 * \param file_priv file private pointer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 * \param cmd command.
192 * \param arg pointer to a drm_agp_buffer structure.
193 * \return zero on success or a negative number on failure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000194 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 * Verifies the AGP device is present and has been acquired, allocates the
Daniel Vetter89c37262010-08-23 22:53:36 +0200196 * memory via agp_allocate_memory() and creates a drm_agp_mem entry for it.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000198int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199{
Dave Airlie55910512007-07-11 16:53:40 +1000200 struct drm_agp_mem *entry;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000201 DRM_AGP_MEM *memory;
202 unsigned long pages;
203 u32 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
205 if (!dev->agp || !dev->agp->acquired)
206 return -EINVAL;
Eric Anholt9a298b22009-03-24 12:23:04 -0700207 if (!(entry = kmalloc(sizeof(*entry), GFP_KERNEL)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 return -ENOMEM;
209
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000210 memset(entry, 0, sizeof(*entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
Dave Airlieefa58392005-11-11 22:33:39 +1100212 pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
213 type = (u32) request->type;
Daniel Vetter89c37262010-08-23 22:53:36 +0200214 if (!(memory = agp_allocate_memory(dev->agp->bridge, pages, type))) {
Eric Anholt9a298b22009-03-24 12:23:04 -0700215 kfree(entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 return -ENOMEM;
217 }
218
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000219 entry->handle = (unsigned long)memory->key + 1;
220 entry->memory = memory;
221 entry->bound = 0;
222 entry->pages = pages;
Dave Airliebd1b3312007-05-26 05:01:51 +1000223 list_add(&entry->head, &dev->agp->memory);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Dave Airlieefa58392005-11-11 22:33:39 +1100225 request->handle = entry->handle;
226 request->physical = memory->physical;
227
228 return 0;
229}
230EXPORT_SYMBOL(drm_agp_alloc);
231
Eric Anholtc153f452007-09-03 12:06:45 +1000232
233int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
234 struct drm_file *file_priv)
Dave Airlieefa58392005-11-11 22:33:39 +1100235{
Eric Anholtc153f452007-09-03 12:06:45 +1000236 struct drm_agp_buffer *request = data;
Dave Airlieefa58392005-11-11 22:33:39 +1100237
Eric Anholtc153f452007-09-03 12:06:45 +1000238 return drm_agp_alloc(dev, request);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239}
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.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000247 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 * Walks through drm_agp_head::memory until finding a matching handle.
249 */
Dave Airlie55910512007-07-11 16:53:40 +1000250static struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device * dev,
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000251 unsigned long handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
Dave Airlie55910512007-07-11 16:53:40 +1000253 struct drm_agp_mem *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Dave Airliebd1b3312007-05-26 05:01:51 +1000255 list_for_each_entry(entry, &dev->agp->memory, head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 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.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000266 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 * \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 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000274int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275{
Dave Airlie55910512007-07-11 16:53:40 +1000276 struct drm_agp_mem *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 int ret;
278
279 if (!dev->agp || !dev->agp->acquired)
280 return -EINVAL;
Dave Airlieefa58392005-11-11 22:33:39 +1100281 if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 return -EINVAL;
283 if (!entry->bound)
284 return -EINVAL;
285 ret = drm_unbind_agp(entry->memory);
286 if (ret == 0)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000287 entry->bound = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 return ret;
289}
Dave Airlieefa58392005-11-11 22:33:39 +1100290EXPORT_SYMBOL(drm_agp_unbind);
291
Eric Anholtc153f452007-09-03 12:06:45 +1000292
293int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
294 struct drm_file *file_priv)
Dave Airlieefa58392005-11-11 22:33:39 +1100295{
Eric Anholtc153f452007-09-03 12:06:45 +1000296 struct drm_agp_binding *request = data;
Dave Airlieefa58392005-11-11 22:33:39 +1100297
Eric Anholtc153f452007-09-03 12:06:45 +1000298 return drm_agp_unbind(dev, request);
Dave Airlieefa58392005-11-11 22:33:39 +1100299}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
301/**
302 * Bind AGP memory into the GATT (ioctl)
303 *
304 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000305 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 * \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 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000314int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315{
Dave Airlie55910512007-07-11 16:53:40 +1000316 struct drm_agp_mem *entry;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000317 int retcode;
318 int page;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
320 if (!dev->agp || !dev->agp->acquired)
321 return -EINVAL;
Dave Airlieefa58392005-11-11 22:33:39 +1100322 if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 return -EINVAL;
324 if (entry->bound)
325 return -EINVAL;
Dave Airlieefa58392005-11-11 22:33:39 +1100326 page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 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}
Dave Airlieefa58392005-11-11 22:33:39 +1100334EXPORT_SYMBOL(drm_agp_bind);
335
Eric Anholtc153f452007-09-03 12:06:45 +1000336
337int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
338 struct drm_file *file_priv)
Dave Airlieefa58392005-11-11 22:33:39 +1100339{
Eric Anholtc153f452007-09-03 12:06:45 +1000340 struct drm_agp_binding *request = data;
Dave Airlieefa58392005-11-11 22:33:39 +1100341
Eric Anholtc153f452007-09-03 12:06:45 +1000342 return drm_agp_bind(dev, request);
Dave Airlieefa58392005-11-11 22:33:39 +1100343}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345/**
346 * Free AGP memory (ioctl).
347 *
348 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000349 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 * \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 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000359int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360{
Dave Airlie55910512007-07-11 16:53:40 +1000361 struct drm_agp_mem *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
363 if (!dev->agp || !dev->agp->acquired)
364 return -EINVAL;
Dave Airlieefa58392005-11-11 22:33:39 +1100365 if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 return -EINVAL;
367 if (entry->bound)
368 drm_unbind_agp(entry->memory);
369
Dave Airliebd1b3312007-05-26 05:01:51 +1000370 list_del(&entry->head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
372 drm_free_agp(entry->memory, entry->pages);
Eric Anholt9a298b22009-03-24 12:23:04 -0700373 kfree(entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 return 0;
375}
Dave Airlieefa58392005-11-11 22:33:39 +1100376EXPORT_SYMBOL(drm_agp_free);
377
Eric Anholtc153f452007-09-03 12:06:45 +1000378
379
380int drm_agp_free_ioctl(struct drm_device *dev, void *data,
381 struct drm_file *file_priv)
Dave Airlieefa58392005-11-11 22:33:39 +1100382{
Eric Anholtc153f452007-09-03 12:06:45 +1000383 struct drm_agp_buffer *request = data;
Dave Airlieefa58392005-11-11 22:33:39 +1100384
Eric Anholtc153f452007-09-03 12:06:45 +1000385 return drm_agp_free(dev, request);
Dave Airlieefa58392005-11-11 22:33:39 +1100386}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
388/**
389 * Initialize the AGP resources.
390 *
391 * \return pointer to a drm_agp_head structure.
392 *
Dave Airlied985c102006-01-02 21:32:48 +1100393 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 */
Dave Airlie55910512007-07-11 16:53:40 +1000397struct drm_agp_head *drm_agp_init(struct drm_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398{
Dave Airlie55910512007-07-11 16:53:40 +1000399 struct drm_agp_head *head = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
Eric Anholt9a298b22009-03-24 12:23:04 -0700401 if (!(head = kmalloc(sizeof(*head), GFP_KERNEL)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 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))) {
Eric Anholt9a298b22009-03-24 12:23:04 -0700407 kfree(head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 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) {
Eric Anholt9a298b22009-03-24 12:23:04 -0700416 kfree(head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 return NULL;
418 }
Dave Airliebd1b3312007-05-26 05:01:51 +1000419 INIT_LIST_HEAD(&head->memory);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 head->cant_use_aperture = head->agp_info.cant_use_aperture;
421 head->page_mask = head->agp_info.page_mask;
Eric Anholt8b409582007-11-22 16:40:37 +1000422 head->base = head->agp_info.aper_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 return head;
424}
425
Eric Anholt673a3942008-07-30 12:06:12 -0700426/**
427 * Binds a collection of pages into AGP memory at the given offset, returning
428 * the AGP memory structure containing them.
429 *
430 * No reference is held on the pages during this time -- it is up to the
431 * caller to handle that.
432 */
433DRM_AGP_MEM *
434drm_agp_bind_pages(struct drm_device *dev,
435 struct page **pages,
436 unsigned long num_pages,
Keith Packardba1eb1d2008-10-14 19:55:10 -0700437 uint32_t gtt_offset,
438 u32 type)
Eric Anholt673a3942008-07-30 12:06:12 -0700439{
440 DRM_AGP_MEM *mem;
441 int ret, i;
442
443 DRM_DEBUG("\n");
444
Daniel Vetter89c37262010-08-23 22:53:36 +0200445 mem = agp_allocate_memory(dev->agp->bridge, num_pages,
Keith Packardba1eb1d2008-10-14 19:55:10 -0700446 type);
Eric Anholt673a3942008-07-30 12:06:12 -0700447 if (mem == NULL) {
448 DRM_ERROR("Failed to allocate memory for %ld pages\n",
449 num_pages);
450 return NULL;
451 }
452
453 for (i = 0; i < num_pages; i++)
Dave Airlie07613ba2009-06-12 14:11:41 +1000454 mem->pages[i] = pages[i];
Eric Anholt673a3942008-07-30 12:06:12 -0700455 mem->page_count = num_pages;
456
457 mem->is_flushed = true;
Daniel Vetter89c37262010-08-23 22:53:36 +0200458 ret = agp_bind_memory(mem, gtt_offset / PAGE_SIZE);
Eric Anholt673a3942008-07-30 12:06:12 -0700459 if (ret != 0) {
460 DRM_ERROR("Failed to bind AGP memory: %d\n", ret);
461 agp_free_memory(mem);
462 return NULL;
463 }
464
465 return mem;
466}
467EXPORT_SYMBOL(drm_agp_bind_pages);
468
Eric Anholt673a3942008-07-30 12:06:12 -0700469#endif /* __OS_HAS_AGP */