blob: 14796594e5d95044283d928c05a270e4a5577e21 [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
34#include "drmP.h"
35#include <linux/module.h>
36
37#if __OS_HAS_AGP
38
Eric Anholt1bb88ed2009-01-15 01:16:25 -080039#include <asm/agp.h>
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041/**
Dave Airlie7ab98402005-07-10 16:56:52 +100042 * Get AGP information.
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 *
44 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +100045 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 * \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 */
Dave Airlie84b1fd12007-07-11 15:53:27 +100053int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -070054{
Dave Airlieb5e89ed2005-09-25 14:28:13 +100055 DRM_AGP_KERN *kern;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57 if (!dev->agp || !dev->agp->acquired)
58 return -EINVAL;
59
Dave Airlieb5e89ed2005-09-25 14:28:13 +100060 kern = &dev->agp->agp_info;
Dave Airlie7ab98402005-07-10 16:56:52 +100061 info->agp_version_major = kern->version.major;
62 info->agp_version_minor = kern->version.minor;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100063 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Dave Airlie7ab98402005-07-10 16:56:52 +100071 return 0;
72}
Dave Airlieb5e89ed2005-09-25 14:28:13 +100073
Dave Airlie7ab98402005-07-10 16:56:52 +100074EXPORT_SYMBOL(drm_agp_info);
75
Eric Anholtc153f452007-09-03 12:06:45 +100076int drm_agp_info_ioctl(struct drm_device *dev, void *data,
77 struct drm_file *file_priv)
Dave Airlie7ab98402005-07-10 16:56:52 +100078{
Eric Anholtc153f452007-09-03 12:06:45 +100079 struct drm_agp_info *info = data;
Dave Airlie7ab98402005-07-10 16:56:52 +100080 int err;
81
Eric Anholtc153f452007-09-03 12:06:45 +100082 err = drm_agp_info(dev, info);
Dave Airlie7ab98402005-07-10 16:56:52 +100083 if (err)
84 return err;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100085
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 return 0;
87}
88
89/**
Dave Airlie7ab98402005-07-10 16:56:52 +100090 * Acquire the AGP device.
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 *
Dave Airlied985c102006-01-02 21:32:48 +110092 * \param dev DRM device that is to acquire AGP.
Dave Airlieb5e89ed2005-09-25 14:28:13 +100093 * \return zero on success or a negative number on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 *
95 * Verifies the AGP device hasn't been acquired before and calls
Dave Airlie7ab98402005-07-10 16:56:52 +100096 * \c agp_backend_acquire.
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 */
Dave Airlie84b1fd12007-07-11 15:53:27 +100098int drm_agp_acquire(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070099{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 if (!dev->agp)
101 return -ENODEV;
102 if (dev->agp->acquired)
103 return -EBUSY;
104 if (!(dev->agp->bridge = agp_backend_acquire(dev->pdev)))
105 return -ENODEV;
106 dev->agp->acquired = 1;
107 return 0;
108}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000109
Dave Airlie7ab98402005-07-10 16:56:52 +1000110EXPORT_SYMBOL(drm_agp_acquire);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
112/**
Dave Airlie7ab98402005-07-10 16:56:52 +1000113 * Acquire the AGP device (ioctl).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 *
115 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000116 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 * \param cmd command.
118 * \param arg user argument.
119 * \return zero on success or a negative number on failure.
120 *
Dave Airlie7ab98402005-07-10 16:56:52 +1000121 * Verifies the AGP device hasn't been acquired before and calls
122 * \c agp_backend_acquire.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 */
Eric Anholtc153f452007-09-03 12:06:45 +1000124int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
125 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126{
Dave Airlie2c14f282008-04-21 16:47:32 +1000127 return drm_agp_acquire((struct drm_device *) file_priv->minor->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128}
129
130/**
131 * Release the AGP device.
132 *
Dave Airlied985c102006-01-02 21:32:48 +1100133 * \param dev DRM device that is to release AGP.
Dave Airlie7ab98402005-07-10 16:56:52 +1000134 * \return zero on success or a negative number on failure.
135 *
136 * Verifies the AGP device has been acquired and calls \c agp_backend_release.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000138int drm_agp_release(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139{
Dave Airlie7ab98402005-07-10 16:56:52 +1000140 if (!dev->agp || !dev->agp->acquired)
141 return -EINVAL;
142 agp_backend_release(dev->agp->bridge);
143 dev->agp->acquired = 0;
144 return 0;
145}
146EXPORT_SYMBOL(drm_agp_release);
147
Eric Anholtc153f452007-09-03 12:06:45 +1000148int drm_agp_release_ioctl(struct drm_device *dev, void *data,
149 struct drm_file *file_priv)
Dave Airlie7ab98402005-07-10 16:56:52 +1000150{
Dave Airlie7ab98402005-07-10 16:56:52 +1000151 return drm_agp_release(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152}
153
154/**
155 * Enable the AGP bus.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000156 *
Dave Airlie7ab98402005-07-10 16:56:52 +1000157 * \param dev DRM device that has previously acquired AGP.
158 * \param mode Requested AGP mode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 * \return zero on success or a negative number on failure.
160 *
161 * Verifies the AGP device has been acquired but not enabled, and calls
Dave Airlie7ab98402005-07-10 16:56:52 +1000162 * \c agp_enable.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000164int drm_agp_enable(struct drm_device * dev, struct drm_agp_mode mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 if (!dev->agp || !dev->agp->acquired)
167 return -EINVAL;
168
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000169 dev->agp->mode = mode.mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 agp_enable(dev->agp->bridge, mode.mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 dev->agp->enabled = 1;
172 return 0;
173}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000174
Dave Airlie7ab98402005-07-10 16:56:52 +1000175EXPORT_SYMBOL(drm_agp_enable);
176
Eric Anholtc153f452007-09-03 12:06:45 +1000177int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
178 struct drm_file *file_priv)
Dave Airlie7ab98402005-07-10 16:56:52 +1000179{
Eric Anholtc153f452007-09-03 12:06:45 +1000180 struct drm_agp_mode *mode = data;
Dave Airlie7ab98402005-07-10 16:56:52 +1000181
Eric Anholtc153f452007-09-03 12:06:45 +1000182 return drm_agp_enable(dev, *mode);
Dave Airlie7ab98402005-07-10 16:56:52 +1000183}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
185/**
186 * Allocate AGP memory.
187 *
188 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000189 * \param file_priv file private pointer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 * \param cmd command.
191 * \param arg pointer to a drm_agp_buffer structure.
192 * \return zero on success or a negative number on failure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000193 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 * Verifies the AGP device is present and has been acquired, allocates the
195 * memory via alloc_agp() and creates a drm_agp_mem entry for it.
196 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000197int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198{
Dave Airlie55910512007-07-11 16:53:40 +1000199 struct drm_agp_mem *entry;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000200 DRM_AGP_MEM *memory;
201 unsigned long pages;
202 u32 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
204 if (!dev->agp || !dev->agp->acquired)
205 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 if (!(entry = drm_alloc(sizeof(*entry), DRM_MEM_AGPLISTS)))
207 return -ENOMEM;
208
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000209 memset(entry, 0, sizeof(*entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
Dave Airlieefa58392005-11-11 22:33:39 +1100211 pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
212 type = (u32) request->type;
Dave Airlieb5d499c2005-07-10 18:17:42 +1000213 if (!(memory = drm_alloc_agp(dev, pages, type))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
215 return -ENOMEM;
216 }
217
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000218 entry->handle = (unsigned long)memory->key + 1;
219 entry->memory = memory;
220 entry->bound = 0;
221 entry->pages = pages;
Dave Airliebd1b3312007-05-26 05:01:51 +1000222 list_add(&entry->head, &dev->agp->memory);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Dave Airlieefa58392005-11-11 22:33:39 +1100224 request->handle = entry->handle;
225 request->physical = memory->physical;
226
227 return 0;
228}
229EXPORT_SYMBOL(drm_agp_alloc);
230
Eric Anholtc153f452007-09-03 12:06:45 +1000231
232int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
233 struct drm_file *file_priv)
Dave Airlieefa58392005-11-11 22:33:39 +1100234{
Eric Anholtc153f452007-09-03 12:06:45 +1000235 struct drm_agp_buffer *request = data;
Dave Airlieefa58392005-11-11 22:33:39 +1100236
Eric Anholtc153f452007-09-03 12:06:45 +1000237 return drm_agp_alloc(dev, request);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238}
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.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000246 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 * Walks through drm_agp_head::memory until finding a matching handle.
248 */
Dave Airlie55910512007-07-11 16:53:40 +1000249static struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device * dev,
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000250 unsigned long handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251{
Dave Airlie55910512007-07-11 16:53:40 +1000252 struct drm_agp_mem *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Dave Airliebd1b3312007-05-26 05:01:51 +1000254 list_for_each_entry(entry, &dev->agp->memory, head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 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.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000265 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 * \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 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000273int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274{
Dave Airlie55910512007-07-11 16:53:40 +1000275 struct drm_agp_mem *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 int ret;
277
278 if (!dev->agp || !dev->agp->acquired)
279 return -EINVAL;
Dave Airlieefa58392005-11-11 22:33:39 +1100280 if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 return -EINVAL;
282 if (!entry->bound)
283 return -EINVAL;
284 ret = drm_unbind_agp(entry->memory);
285 if (ret == 0)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000286 entry->bound = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 return ret;
288}
Dave Airlieefa58392005-11-11 22:33:39 +1100289EXPORT_SYMBOL(drm_agp_unbind);
290
Eric Anholtc153f452007-09-03 12:06:45 +1000291
292int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
293 struct drm_file *file_priv)
Dave Airlieefa58392005-11-11 22:33:39 +1100294{
Eric Anholtc153f452007-09-03 12:06:45 +1000295 struct drm_agp_binding *request = data;
Dave Airlieefa58392005-11-11 22:33:39 +1100296
Eric Anholtc153f452007-09-03 12:06:45 +1000297 return drm_agp_unbind(dev, request);
Dave Airlieefa58392005-11-11 22:33:39 +1100298}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
300/**
301 * Bind AGP memory into the GATT (ioctl)
302 *
303 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000304 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 * \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 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000313int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314{
Dave Airlie55910512007-07-11 16:53:40 +1000315 struct drm_agp_mem *entry;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000316 int retcode;
317 int page;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
319 if (!dev->agp || !dev->agp->acquired)
320 return -EINVAL;
Dave Airlieefa58392005-11-11 22:33:39 +1100321 if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 return -EINVAL;
323 if (entry->bound)
324 return -EINVAL;
Dave Airlieefa58392005-11-11 22:33:39 +1100325 page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 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}
Dave Airlieefa58392005-11-11 22:33:39 +1100333EXPORT_SYMBOL(drm_agp_bind);
334
Eric Anholtc153f452007-09-03 12:06:45 +1000335
336int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
337 struct drm_file *file_priv)
Dave Airlieefa58392005-11-11 22:33:39 +1100338{
Eric Anholtc153f452007-09-03 12:06:45 +1000339 struct drm_agp_binding *request = data;
Dave Airlieefa58392005-11-11 22:33:39 +1100340
Eric Anholtc153f452007-09-03 12:06:45 +1000341 return drm_agp_bind(dev, request);
Dave Airlieefa58392005-11-11 22:33:39 +1100342}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344/**
345 * Free AGP memory (ioctl).
346 *
347 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000348 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 * \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 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000358int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
Dave Airlie55910512007-07-11 16:53:40 +1000360 struct drm_agp_mem *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362 if (!dev->agp || !dev->agp->acquired)
363 return -EINVAL;
Dave Airlieefa58392005-11-11 22:33:39 +1100364 if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 return -EINVAL;
366 if (entry->bound)
367 drm_unbind_agp(entry->memory);
368
Dave Airliebd1b3312007-05-26 05:01:51 +1000369 list_del(&entry->head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
371 drm_free_agp(entry->memory, entry->pages);
372 drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
373 return 0;
374}
Dave Airlieefa58392005-11-11 22:33:39 +1100375EXPORT_SYMBOL(drm_agp_free);
376
Eric Anholtc153f452007-09-03 12:06:45 +1000377
378
379int drm_agp_free_ioctl(struct drm_device *dev, void *data,
380 struct drm_file *file_priv)
Dave Airlieefa58392005-11-11 22:33:39 +1100381{
Eric Anholtc153f452007-09-03 12:06:45 +1000382 struct drm_agp_buffer *request = data;
Dave Airlieefa58392005-11-11 22:33:39 +1100383
Eric Anholtc153f452007-09-03 12:06:45 +1000384 return drm_agp_free(dev, request);
Dave Airlieefa58392005-11-11 22:33:39 +1100385}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
387/**
388 * Initialize the AGP resources.
389 *
390 * \return pointer to a drm_agp_head structure.
391 *
Dave Airlied985c102006-01-02 21:32:48 +1100392 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 */
Dave Airlie55910512007-07-11 16:53:40 +1000396struct drm_agp_head *drm_agp_init(struct drm_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397{
Dave Airlie55910512007-07-11 16:53:40 +1000398 struct drm_agp_head *head = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
400 if (!(head = drm_alloc(sizeof(*head), DRM_MEM_AGPLISTS)))
401 return NULL;
402 memset((void *)head, 0, sizeof(*head));
403 head->bridge = agp_find_bridge(dev->pdev);
404 if (!head->bridge) {
405 if (!(head->bridge = agp_backend_acquire(dev->pdev))) {
406 drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
407 return NULL;
408 }
409 agp_copy_info(head->bridge, &head->agp_info);
410 agp_backend_release(head->bridge);
411 } else {
412 agp_copy_info(head->bridge, &head->agp_info);
413 }
414 if (head->agp_info.chipset == NOT_SUPPORTED) {
415 drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
416 return NULL;
417 }
Dave Airliebd1b3312007-05-26 05:01:51 +1000418 INIT_LIST_HEAD(&head->memory);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 head->cant_use_aperture = head->agp_info.cant_use_aperture;
420 head->page_mask = head->agp_info.page_mask;
Eric Anholt8b409582007-11-22 16:40:37 +1000421 head->base = head->agp_info.aper_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 return head;
423}
424
425/** Calls agp_allocate_memory() */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000426DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data * bridge,
427 size_t pages, u32 type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428{
429 return agp_allocate_memory(bridge, pages, type);
430}
431
432/** Calls agp_free_memory() */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000433int drm_agp_free_memory(DRM_AGP_MEM * handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434{
435 if (!handle)
436 return 0;
437 agp_free_memory(handle);
438 return 1;
439}
440
441/** Calls agp_bind_memory() */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000442int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443{
444 if (!handle)
445 return -EINVAL;
446 return agp_bind_memory(handle, start);
447}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000448
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449/** Calls agp_unbind_memory() */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000450int drm_agp_unbind_memory(DRM_AGP_MEM * handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451{
452 if (!handle)
453 return -EINVAL;
454 return agp_unbind_memory(handle);
455}
456
Eric Anholt673a3942008-07-30 12:06:12 -0700457/**
458 * Binds a collection of pages into AGP memory at the given offset, returning
459 * the AGP memory structure containing them.
460 *
461 * No reference is held on the pages during this time -- it is up to the
462 * caller to handle that.
463 */
464DRM_AGP_MEM *
465drm_agp_bind_pages(struct drm_device *dev,
466 struct page **pages,
467 unsigned long num_pages,
Keith Packardba1eb1d2008-10-14 19:55:10 -0700468 uint32_t gtt_offset,
469 u32 type)
Eric Anholt673a3942008-07-30 12:06:12 -0700470{
471 DRM_AGP_MEM *mem;
472 int ret, i;
473
474 DRM_DEBUG("\n");
475
476 mem = drm_agp_allocate_memory(dev->agp->bridge, num_pages,
Keith Packardba1eb1d2008-10-14 19:55:10 -0700477 type);
Eric Anholt673a3942008-07-30 12:06:12 -0700478 if (mem == NULL) {
479 DRM_ERROR("Failed to allocate memory for %ld pages\n",
480 num_pages);
481 return NULL;
482 }
483
484 for (i = 0; i < num_pages; i++)
485 mem->memory[i] = phys_to_gart(page_to_phys(pages[i]));
486 mem->page_count = num_pages;
487
488 mem->is_flushed = true;
489 ret = drm_agp_bind_memory(mem, gtt_offset / PAGE_SIZE);
490 if (ret != 0) {
491 DRM_ERROR("Failed to bind AGP memory: %d\n", ret);
492 agp_free_memory(mem);
493 return NULL;
494 }
495
496 return mem;
497}
498EXPORT_SYMBOL(drm_agp_bind_pages);
499
500void drm_agp_chipset_flush(struct drm_device *dev)
501{
502 agp_flush_chipset(dev->agp->bridge);
503}
504EXPORT_SYMBOL(drm_agp_chipset_flush);
505
506#endif /* __OS_HAS_AGP */