blob: 4b2b4aa5033ba1d6988f4f2c7dfc1ae605d82da5 [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>
David Herrmanncc5ea592014-08-29 12:12:32 +020037#include "drm_legacy.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39#if __OS_HAS_AGP
40
Eric Anholt1bb88ed2009-01-15 01:16:25 -080041#include <asm/agp.h>
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043/**
Dave Airlie7ab98402005-07-10 16:56:52 +100044 * Get AGP information.
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 *
46 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +100047 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 * \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 */
Dave Airlie84b1fd12007-07-11 15:53:27 +100055int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -070056{
Daniel Vetterd2e546b2013-12-11 11:34:40 +010057 struct agp_kern_info *kern;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59 if (!dev->agp || !dev->agp->acquired)
60 return -EINVAL;
61
Dave Airlieb5e89ed2005-09-25 14:28:13 +100062 kern = &dev->agp->agp_info;
Dave Airlie7ab98402005-07-10 16:56:52 +100063 info->agp_version_major = kern->version.major;
64 info->agp_version_minor = kern->version.minor;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100065 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Dave Airlie7ab98402005-07-10 16:56:52 +100073 return 0;
74}
Dave Airlieb5e89ed2005-09-25 14:28:13 +100075
Dave Airlie7ab98402005-07-10 16:56:52 +100076EXPORT_SYMBOL(drm_agp_info);
77
Eric Anholtc153f452007-09-03 12:06:45 +100078int drm_agp_info_ioctl(struct drm_device *dev, void *data,
79 struct drm_file *file_priv)
Dave Airlie7ab98402005-07-10 16:56:52 +100080{
Eric Anholtc153f452007-09-03 12:06:45 +100081 struct drm_agp_info *info = data;
Dave Airlie7ab98402005-07-10 16:56:52 +100082 int err;
83
Eric Anholtc153f452007-09-03 12:06:45 +100084 err = drm_agp_info(dev, info);
Dave Airlie7ab98402005-07-10 16:56:52 +100085 if (err)
86 return err;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100087
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 return 0;
89}
90
91/**
Dave Airlie7ab98402005-07-10 16:56:52 +100092 * Acquire the AGP device.
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 *
Dave Airlied985c102006-01-02 21:32:48 +110094 * \param dev DRM device that is to acquire AGP.
Dave Airlieb5e89ed2005-09-25 14:28:13 +100095 * \return zero on success or a negative number on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 *
97 * Verifies the AGP device hasn't been acquired before and calls
Dave Airlie7ab98402005-07-10 16:56:52 +100098 * \c agp_backend_acquire.
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000100int drm_agp_acquire(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 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}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000111
Dave Airlie7ab98402005-07-10 16:56:52 +1000112EXPORT_SYMBOL(drm_agp_acquire);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114/**
Dave Airlie7ab98402005-07-10 16:56:52 +1000115 * Acquire the AGP device (ioctl).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 *
117 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000118 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 * \param cmd command.
120 * \param arg user argument.
121 * \return zero on success or a negative number on failure.
122 *
Dave Airlie7ab98402005-07-10 16:56:52 +1000123 * Verifies the AGP device hasn't been acquired before and calls
124 * \c agp_backend_acquire.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 */
Eric Anholtc153f452007-09-03 12:06:45 +1000126int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
127 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128{
Dave Airlie2c14f282008-04-21 16:47:32 +1000129 return drm_agp_acquire((struct drm_device *) file_priv->minor->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130}
131
132/**
133 * Release the AGP device.
134 *
Dave Airlied985c102006-01-02 21:32:48 +1100135 * \param dev DRM device that is to release AGP.
Dave Airlie7ab98402005-07-10 16:56:52 +1000136 * \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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000140int drm_agp_release(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141{
Dave Airlie7ab98402005-07-10 16:56:52 +1000142 if (!dev->agp || !dev->agp->acquired)
143 return -EINVAL;
144 agp_backend_release(dev->agp->bridge);
145 dev->agp->acquired = 0;
146 return 0;
147}
148EXPORT_SYMBOL(drm_agp_release);
149
Eric Anholtc153f452007-09-03 12:06:45 +1000150int drm_agp_release_ioctl(struct drm_device *dev, void *data,
151 struct drm_file *file_priv)
Dave Airlie7ab98402005-07-10 16:56:52 +1000152{
Dave Airlie7ab98402005-07-10 16:56:52 +1000153 return drm_agp_release(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154}
155
156/**
157 * Enable the AGP bus.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000158 *
Dave Airlie7ab98402005-07-10 16:56:52 +1000159 * \param dev DRM device that has previously acquired AGP.
160 * \param mode Requested AGP mode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 * \return zero on success or a negative number on failure.
162 *
163 * Verifies the AGP device has been acquired but not enabled, and calls
Dave Airlie7ab98402005-07-10 16:56:52 +1000164 * \c agp_enable.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000166int drm_agp_enable(struct drm_device * dev, struct drm_agp_mode mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 if (!dev->agp || !dev->agp->acquired)
169 return -EINVAL;
170
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000171 dev->agp->mode = mode.mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 agp_enable(dev->agp->bridge, mode.mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 dev->agp->enabled = 1;
174 return 0;
175}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000176
Dave Airlie7ab98402005-07-10 16:56:52 +1000177EXPORT_SYMBOL(drm_agp_enable);
178
Eric Anholtc153f452007-09-03 12:06:45 +1000179int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
180 struct drm_file *file_priv)
Dave Airlie7ab98402005-07-10 16:56:52 +1000181{
Eric Anholtc153f452007-09-03 12:06:45 +1000182 struct drm_agp_mode *mode = data;
Dave Airlie7ab98402005-07-10 16:56:52 +1000183
Eric Anholtc153f452007-09-03 12:06:45 +1000184 return drm_agp_enable(dev, *mode);
Dave Airlie7ab98402005-07-10 16:56:52 +1000185}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
187/**
188 * Allocate AGP memory.
189 *
190 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000191 * \param file_priv file private pointer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 * \param cmd command.
193 * \param arg pointer to a drm_agp_buffer structure.
194 * \return zero on success or a negative number on failure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000195 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 * Verifies the AGP device is present and has been acquired, allocates the
Daniel Vetter89c37262010-08-23 22:53:36 +0200197 * memory via agp_allocate_memory() and creates a drm_agp_mem entry for it.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000199int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200{
Dave Airlie55910512007-07-11 16:53:40 +1000201 struct drm_agp_mem *entry;
Daniel Vetterd2e546b2013-12-11 11:34:40 +0100202 struct agp_memory *memory;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000203 unsigned long pages;
204 u32 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
206 if (!dev->agp || !dev->agp->acquired)
207 return -EINVAL;
Dave Airlied5e41ad2013-12-18 11:27:06 +1000208 if (!(entry = kzalloc(sizeof(*entry), GFP_KERNEL)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 return -ENOMEM;
210
Dave Airlieefa58392005-11-11 22:33:39 +1100211 pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
212 type = (u32) request->type;
Daniel Vetter89c37262010-08-23 22:53:36 +0200213 if (!(memory = agp_allocate_memory(dev->agp->bridge, pages, type))) {
Eric Anholt9a298b22009-03-24 12:23:04 -0700214 kfree(entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 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);
Eric Anholt9a298b22009-03-24 12:23:04 -0700372 kfree(entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 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.
Daniel Vetterd6e4b282013-12-11 11:34:37 +0100395 *
396 * Note that final cleanup of the kmalloced structure is directly done in
397 * drm_pci_agp_destroy.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 */
Dave Airlie55910512007-07-11 16:53:40 +1000399struct drm_agp_head *drm_agp_init(struct drm_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400{
Dave Airlie55910512007-07-11 16:53:40 +1000401 struct drm_agp_head *head = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
Dave Airlied5e41ad2013-12-18 11:27:06 +1000403 if (!(head = kzalloc(sizeof(*head), GFP_KERNEL)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 head->bridge = agp_find_bridge(dev->pdev);
406 if (!head->bridge) {
407 if (!(head->bridge = agp_backend_acquire(dev->pdev))) {
Eric Anholt9a298b22009-03-24 12:23:04 -0700408 kfree(head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 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) {
Eric Anholt9a298b22009-03-24 12:23:04 -0700417 kfree(head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 return NULL;
419 }
Dave Airliebd1b3312007-05-26 05:01:51 +1000420 INIT_LIST_HEAD(&head->memory);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 head->cant_use_aperture = head->agp_info.cant_use_aperture;
422 head->page_mask = head->agp_info.page_mask;
Eric Anholt8b409582007-11-22 16:40:37 +1000423 head->base = head->agp_info.aper_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 return head;
425}
426
Eric Anholt673a3942008-07-30 12:06:12 -0700427/**
David Herrmann28ec7112013-07-27 16:37:00 +0200428 * 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 */
439void drm_agp_clear(struct drm_device *dev)
440{
441 struct drm_agp_mem *entry, *tempe;
442
Daniel Vetterd9906752013-12-11 11:34:35 +0100443 if (!dev->agp)
David Herrmann28ec7112013-07-27 16:37:00 +0200444 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
463/**
Eric Anholt673a3942008-07-30 12:06:12 -0700464 * 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 */
Daniel Vetterd2e546b2013-12-11 11:34:40 +0100470struct agp_memory *
Eric Anholt673a3942008-07-30 12:06:12 -0700471drm_agp_bind_pages(struct drm_device *dev,
472 struct page **pages,
473 unsigned long num_pages,
Keith Packardba1eb1d2008-10-14 19:55:10 -0700474 uint32_t gtt_offset,
475 u32 type)
Eric Anholt673a3942008-07-30 12:06:12 -0700476{
Daniel Vetterd2e546b2013-12-11 11:34:40 +0100477 struct agp_memory *mem;
Eric Anholt673a3942008-07-30 12:06:12 -0700478 int ret, i;
479
480 DRM_DEBUG("\n");
481
Daniel Vetter89c37262010-08-23 22:53:36 +0200482 mem = agp_allocate_memory(dev->agp->bridge, num_pages,
Keith Packardba1eb1d2008-10-14 19:55:10 -0700483 type);
Eric Anholt673a3942008-07-30 12:06:12 -0700484 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++)
Dave Airlie07613ba2009-06-12 14:11:41 +1000491 mem->pages[i] = pages[i];
Eric Anholt673a3942008-07-30 12:06:12 -0700492 mem->page_count = num_pages;
493
494 mem->is_flushed = true;
Daniel Vetter89c37262010-08-23 22:53:36 +0200495 ret = agp_bind_memory(mem, gtt_offset / PAGE_SIZE);
Eric Anholt673a3942008-07-30 12:06:12 -0700496 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}
504EXPORT_SYMBOL(drm_agp_bind_pages);
505
Eric Anholt673a3942008-07-30 12:06:12 -0700506#endif /* __OS_HAS_AGP */