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 | ||
34 | #include "drmP.h" | |
35 | #include <linux/module.h> | |
36 | ||
37 | #if __OS_HAS_AGP | |
38 | ||
39 | /** | |
7ab98401 | 40 | * Get AGP information. |
1da177e4 LT |
41 | * |
42 | * \param inode device inode. | |
6c340eac | 43 | * \param file_priv DRM file private. |
1da177e4 LT |
44 | * \param cmd command. |
45 | * \param arg pointer to a (output) drm_agp_info structure. | |
46 | * \return zero on success or a negative number on failure. | |
47 | * | |
48 | * Verifies the AGP device has been initialized and acquired and fills in the | |
49 | * drm_agp_info structure with the information in drm_agp_head::agp_info. | |
50 | */ | |
84b1fd10 | 51 | int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info) |
1da177e4 | 52 | { |
b5e89ed5 | 53 | DRM_AGP_KERN *kern; |
1da177e4 LT |
54 | |
55 | if (!dev->agp || !dev->agp->acquired) | |
56 | return -EINVAL; | |
57 | ||
b5e89ed5 | 58 | kern = &dev->agp->agp_info; |
7ab98401 DA |
59 | info->agp_version_major = kern->version.major; |
60 | info->agp_version_minor = kern->version.minor; | |
b5e89ed5 DA |
61 | info->mode = kern->mode; |
62 | info->aperture_base = kern->aper_base; | |
63 | info->aperture_size = kern->aper_size * 1024 * 1024; | |
64 | info->memory_allowed = kern->max_memory << PAGE_SHIFT; | |
65 | info->memory_used = kern->current_memory << PAGE_SHIFT; | |
66 | info->id_vendor = kern->device->vendor; | |
67 | info->id_device = kern->device->device; | |
7ab98401 DA |
68 | |
69 | return 0; | |
70 | } | |
b5e89ed5 | 71 | |
7ab98401 DA |
72 | EXPORT_SYMBOL(drm_agp_info); |
73 | ||
c153f45f EA |
74 | int drm_agp_info_ioctl(struct drm_device *dev, void *data, |
75 | struct drm_file *file_priv) | |
7ab98401 | 76 | { |
c153f45f | 77 | struct drm_agp_info *info = data; |
7ab98401 DA |
78 | int err; |
79 | ||
c153f45f | 80 | err = drm_agp_info(dev, info); |
7ab98401 DA |
81 | if (err) |
82 | return err; | |
b5e89ed5 | 83 | |
1da177e4 LT |
84 | return 0; |
85 | } | |
86 | ||
87 | /** | |
7ab98401 | 88 | * Acquire the AGP device. |
1da177e4 | 89 | * |
d985c108 | 90 | * \param dev DRM device that is to acquire AGP. |
b5e89ed5 | 91 | * \return zero on success or a negative number on failure. |
1da177e4 LT |
92 | * |
93 | * Verifies the AGP device hasn't been acquired before and calls | |
7ab98401 | 94 | * \c agp_backend_acquire. |
1da177e4 | 95 | */ |
84b1fd10 | 96 | int drm_agp_acquire(struct drm_device * dev) |
1da177e4 | 97 | { |
1da177e4 LT |
98 | if (!dev->agp) |
99 | return -ENODEV; | |
100 | if (dev->agp->acquired) | |
101 | return -EBUSY; | |
102 | if (!(dev->agp->bridge = agp_backend_acquire(dev->pdev))) | |
103 | return -ENODEV; | |
104 | dev->agp->acquired = 1; | |
105 | return 0; | |
106 | } | |
b5e89ed5 | 107 | |
7ab98401 | 108 | EXPORT_SYMBOL(drm_agp_acquire); |
1da177e4 LT |
109 | |
110 | /** | |
7ab98401 | 111 | * Acquire the AGP device (ioctl). |
1da177e4 LT |
112 | * |
113 | * \param inode device inode. | |
6c340eac | 114 | * \param file_priv DRM file private. |
1da177e4 LT |
115 | * \param cmd command. |
116 | * \param arg user argument. | |
117 | * \return zero on success or a negative number on failure. | |
118 | * | |
7ab98401 DA |
119 | * Verifies the AGP device hasn't been acquired before and calls |
120 | * \c agp_backend_acquire. | |
1da177e4 | 121 | */ |
c153f45f EA |
122 | int drm_agp_acquire_ioctl(struct drm_device *dev, void *data, |
123 | struct drm_file *file_priv) | |
1da177e4 | 124 | { |
6c340eac | 125 | return drm_agp_acquire((struct drm_device *) file_priv->head->dev); |
7ab98401 | 126 | } |
1da177e4 | 127 | |
7ab98401 DA |
128 | /** |
129 | * Release the AGP device. | |
130 | * | |
d985c108 | 131 | * \param dev DRM device that is to release AGP. |
7ab98401 DA |
132 | * \return zero on success or a negative number on failure. |
133 | * | |
134 | * Verifies the AGP device has been acquired and calls \c agp_backend_release. | |
135 | */ | |
84b1fd10 | 136 | int drm_agp_release(struct drm_device * dev) |
7ab98401 | 137 | { |
1da177e4 LT |
138 | if (!dev->agp || !dev->agp->acquired) |
139 | return -EINVAL; | |
140 | agp_backend_release(dev->agp->bridge); | |
141 | dev->agp->acquired = 0; | |
142 | return 0; | |
1da177e4 | 143 | } |
7ab98401 | 144 | EXPORT_SYMBOL(drm_agp_release); |
1da177e4 | 145 | |
c153f45f EA |
146 | int drm_agp_release_ioctl(struct drm_device *dev, void *data, |
147 | struct drm_file *file_priv) | |
1da177e4 | 148 | { |
7ab98401 | 149 | return drm_agp_release(dev); |
1da177e4 LT |
150 | } |
151 | ||
152 | /** | |
153 | * Enable the AGP bus. | |
b5e89ed5 | 154 | * |
7ab98401 DA |
155 | * \param dev DRM device that has previously acquired AGP. |
156 | * \param mode Requested AGP mode. | |
1da177e4 LT |
157 | * \return zero on success or a negative number on failure. |
158 | * | |
159 | * Verifies the AGP device has been acquired but not enabled, and calls | |
7ab98401 | 160 | * \c agp_enable. |
1da177e4 | 161 | */ |
84b1fd10 | 162 | int drm_agp_enable(struct drm_device * dev, struct drm_agp_mode mode) |
1da177e4 | 163 | { |
1da177e4 LT |
164 | if (!dev->agp || !dev->agp->acquired) |
165 | return -EINVAL; | |
166 | ||
b5e89ed5 | 167 | dev->agp->mode = mode.mode; |
1da177e4 | 168 | agp_enable(dev->agp->bridge, mode.mode); |
1da177e4 LT |
169 | dev->agp->enabled = 1; |
170 | return 0; | |
171 | } | |
b5e89ed5 | 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 LT |
192 | * Verifies the AGP device is present and has been acquired, allocates the |
193 | * memory via alloc_agp() and creates a drm_agp_mem entry for it. | |
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; |
b5e89ed5 DA |
198 | DRM_AGP_MEM *memory; |
199 | unsigned long pages; | |
200 | u32 type; | |
1da177e4 LT |
201 | |
202 | if (!dev->agp || !dev->agp->acquired) | |
203 | return -EINVAL; | |
1da177e4 LT |
204 | if (!(entry = drm_alloc(sizeof(*entry), DRM_MEM_AGPLISTS))) |
205 | return -ENOMEM; | |
206 | ||
b5e89ed5 | 207 | memset(entry, 0, sizeof(*entry)); |
1da177e4 | 208 | |
efa58395 DA |
209 | pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; |
210 | type = (u32) request->type; | |
b5d499cf | 211 | if (!(memory = drm_alloc_agp(dev, pages, type))) { |
1da177e4 LT |
212 | drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); |
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 | */ | |
55910517 | 247 | static struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device * dev, |
b5e89ed5 | 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; | |
efa58395 | 278 | if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
1da177e4 LT |
279 | return -EINVAL; |
280 | if (!entry->bound) | |
281 | return -EINVAL; | |
282 | ret = drm_unbind_agp(entry->memory); | |
283 | if (ret == 0) | |
b5e89ed5 | 284 | entry->bound = 0; |
1da177e4 LT |
285 | return ret; |
286 | } | |
efa58395 DA |
287 | EXPORT_SYMBOL(drm_agp_unbind); |
288 | ||
efa58395 | 289 | |
c153f45f EA |
290 | int drm_agp_unbind_ioctl(struct drm_device *dev, void *data, |
291 | struct drm_file *file_priv) | |
292 | { | |
293 | struct drm_agp_binding *request = data; | |
efa58395 | 294 | |
c153f45f | 295 | return drm_agp_unbind(dev, request); |
efa58395 | 296 | } |
1da177e4 LT |
297 | |
298 | /** | |
299 | * Bind AGP memory into the GATT (ioctl) | |
300 | * | |
301 | * \param inode device inode. | |
6c340eac | 302 | * \param file_priv DRM file private. |
1da177e4 LT |
303 | * \param cmd command. |
304 | * \param arg pointer to a drm_agp_binding structure. | |
305 | * \return zero on success or a negative number on failure. | |
306 | * | |
307 | * Verifies the AGP device is present and has been acquired and that no memory | |
308 | * is currently bound into the GATT. Looks-up the AGP memory entry and passes | |
309 | * it to bind_agp() function. | |
310 | */ | |
84b1fd10 | 311 | int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request) |
1da177e4 | 312 | { |
55910517 | 313 | struct drm_agp_mem *entry; |
b5e89ed5 DA |
314 | int retcode; |
315 | int page; | |
1da177e4 LT |
316 | |
317 | if (!dev->agp || !dev->agp->acquired) | |
318 | return -EINVAL; | |
efa58395 | 319 | if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
1da177e4 LT |
320 | return -EINVAL; |
321 | if (entry->bound) | |
322 | return -EINVAL; | |
efa58395 | 323 | page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; |
1da177e4 LT |
324 | if ((retcode = drm_bind_agp(entry->memory, page))) |
325 | return retcode; | |
326 | entry->bound = dev->agp->base + (page << PAGE_SHIFT); | |
327 | DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n", | |
328 | dev->agp->base, entry->bound); | |
329 | return 0; | |
330 | } | |
efa58395 DA |
331 | EXPORT_SYMBOL(drm_agp_bind); |
332 | ||
efa58395 | 333 | |
c153f45f EA |
334 | int drm_agp_bind_ioctl(struct drm_device *dev, void *data, |
335 | struct drm_file *file_priv) | |
336 | { | |
337 | struct drm_agp_binding *request = data; | |
efa58395 | 338 | |
c153f45f | 339 | return drm_agp_bind(dev, request); |
efa58395 | 340 | } |
1da177e4 LT |
341 | |
342 | /** | |
343 | * Free AGP memory (ioctl). | |
344 | * | |
345 | * \param inode device inode. | |
6c340eac | 346 | * \param file_priv DRM file private. |
1da177e4 LT |
347 | * \param cmd command. |
348 | * \param arg pointer to a drm_agp_buffer structure. | |
349 | * \return zero on success or a negative number on failure. | |
350 | * | |
351 | * Verifies the AGP device is present and has been acquired and looks up the | |
352 | * AGP memory entry. If the memory it's currently bound, unbind it via | |
353 | * unbind_agp(). Frees it via free_agp() as well as the entry itself | |
354 | * and unlinks from the doubly linked list it's inserted in. | |
355 | */ | |
84b1fd10 | 356 | int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request) |
1da177e4 | 357 | { |
55910517 | 358 | struct drm_agp_mem *entry; |
1da177e4 LT |
359 | |
360 | if (!dev->agp || !dev->agp->acquired) | |
361 | return -EINVAL; | |
efa58395 | 362 | if (!(entry = drm_agp_lookup_entry(dev, request->handle))) |
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); | |
370 | drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); | |
371 | return 0; | |
372 | } | |
efa58395 DA |
373 | EXPORT_SYMBOL(drm_agp_free); |
374 | ||
efa58395 | 375 | |
efa58395 | 376 | |
c153f45f EA |
377 | int drm_agp_free_ioctl(struct drm_device *dev, void *data, |
378 | struct drm_file *file_priv) | |
379 | { | |
380 | struct drm_agp_buffer *request = data; | |
381 | ||
382 | return drm_agp_free(dev, request); | |
efa58395 | 383 | } |
1da177e4 LT |
384 | |
385 | /** | |
386 | * Initialize the AGP resources. | |
387 | * | |
388 | * \return pointer to a drm_agp_head structure. | |
389 | * | |
d985c108 DA |
390 | * Gets the drm_agp_t structure which is made available by the agpgart module |
391 | * via the inter_module_* functions. Creates and initializes a drm_agp_head | |
392 | * structure. | |
1da177e4 | 393 | */ |
55910517 | 394 | struct drm_agp_head *drm_agp_init(struct drm_device *dev) |
1da177e4 | 395 | { |
55910517 | 396 | struct drm_agp_head *head = NULL; |
1da177e4 LT |
397 | |
398 | if (!(head = drm_alloc(sizeof(*head), DRM_MEM_AGPLISTS))) | |
399 | return NULL; | |
400 | memset((void *)head, 0, sizeof(*head)); | |
401 | head->bridge = agp_find_bridge(dev->pdev); | |
402 | if (!head->bridge) { | |
403 | if (!(head->bridge = agp_backend_acquire(dev->pdev))) { | |
404 | drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS); | |
405 | return NULL; | |
406 | } | |
407 | agp_copy_info(head->bridge, &head->agp_info); | |
408 | agp_backend_release(head->bridge); | |
409 | } else { | |
410 | agp_copy_info(head->bridge, &head->agp_info); | |
411 | } | |
412 | if (head->agp_info.chipset == NOT_SUPPORTED) { | |
413 | drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS); | |
414 | return NULL; | |
415 | } | |
bd1b331f | 416 | INIT_LIST_HEAD(&head->memory); |
1da177e4 LT |
417 | head->cant_use_aperture = head->agp_info.cant_use_aperture; |
418 | head->page_mask = head->agp_info.page_mask; | |
8b409580 | 419 | head->base = head->agp_info.aper_base; |
1da177e4 LT |
420 | return head; |
421 | } | |
422 | ||
423 | /** Calls agp_allocate_memory() */ | |
b5e89ed5 DA |
424 | DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data * bridge, |
425 | size_t pages, u32 type) | |
1da177e4 LT |
426 | { |
427 | return agp_allocate_memory(bridge, pages, type); | |
428 | } | |
429 | ||
430 | /** Calls agp_free_memory() */ | |
b5e89ed5 | 431 | int drm_agp_free_memory(DRM_AGP_MEM * handle) |
1da177e4 LT |
432 | { |
433 | if (!handle) | |
434 | return 0; | |
435 | agp_free_memory(handle); | |
436 | return 1; | |
437 | } | |
438 | ||
439 | /** Calls agp_bind_memory() */ | |
b5e89ed5 | 440 | int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start) |
1da177e4 LT |
441 | { |
442 | if (!handle) | |
443 | return -EINVAL; | |
444 | return agp_bind_memory(handle, start); | |
445 | } | |
b5e89ed5 | 446 | |
1da177e4 | 447 | /** Calls agp_unbind_memory() */ |
b5e89ed5 | 448 | int drm_agp_unbind_memory(DRM_AGP_MEM * handle) |
1da177e4 LT |
449 | { |
450 | if (!handle) | |
451 | return -EINVAL; | |
452 | return agp_unbind_memory(handle); | |
453 | } | |
454 | ||
b5e89ed5 | 455 | #endif /* __OS_HAS_AGP */ |