Merge tag 'asm-generic-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd...
[linux-2.6-block.git] / drivers / gpu / drm / drm_agpsupport.c
CommitLineData
45b2fda3 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
1da177e4 34#include <linux/module.h>
0500c04e 35#include <linux/pci.h>
5a0e3ad6 36#include <linux/slab.h>
1da177e4 37
eb185a32 38#if IS_ENABLED(CONFIG_AGP)
1bb88edb 39#include <asm/agp.h>
eb185a32 40#endif
1bb88edb 41
0500c04e
SR
42#include <drm/drm_device.h>
43#include <drm/drm_drv.h>
44#include <drm/drm_file.h>
45#include <drm/drm_print.h>
46
47#include "drm_legacy.h"
48
04dfe19a
TZ
49#if IS_ENABLED(CONFIG_AGP)
50
cec7638b 51/*
7ab98401 52 * Get AGP information.
1da177e4 53 *
1da177e4
LT
54 * \return zero on success or a negative number on failure.
55 *
56 * Verifies the AGP device has been initialized and acquired and fills in the
57 * drm_agp_info structure with the information in drm_agp_head::agp_info.
58 */
04dfe19a 59int drm_legacy_agp_info(struct drm_device *dev, struct drm_agp_info *info)
1da177e4 60{
d2e546b8 61 struct agp_kern_info *kern;
1da177e4
LT
62
63 if (!dev->agp || !dev->agp->acquired)
64 return -EINVAL;
65
b5e89ed5 66 kern = &dev->agp->agp_info;
7ab98401
DA
67 info->agp_version_major = kern->version.major;
68 info->agp_version_minor = kern->version.minor;
b5e89ed5
DA
69 info->mode = kern->mode;
70 info->aperture_base = kern->aper_base;
71 info->aperture_size = kern->aper_size * 1024 * 1024;
72 info->memory_allowed = kern->max_memory << PAGE_SHIFT;
73 info->memory_used = kern->current_memory << PAGE_SHIFT;
74 info->id_vendor = kern->device->vendor;
75 info->id_device = kern->device->device;
7ab98401
DA
76
77 return 0;
78}
04dfe19a 79EXPORT_SYMBOL(drm_legacy_agp_info);
7ab98401 80
04dfe19a
TZ
81int drm_legacy_agp_info_ioctl(struct drm_device *dev, void *data,
82 struct drm_file *file_priv)
7ab98401 83{
c153f45f 84 struct drm_agp_info *info = data;
7ab98401
DA
85 int err;
86
04dfe19a 87 err = drm_legacy_agp_info(dev, info);
7ab98401
DA
88 if (err)
89 return err;
b5e89ed5 90
1da177e4
LT
91 return 0;
92}
93
cec7638b 94/*
7ab98401 95 * Acquire the AGP device.
1da177e4 96 *
d985c108 97 * \param dev DRM device that is to acquire AGP.
b5e89ed5 98 * \return zero on success or a negative number on failure.
1da177e4
LT
99 *
100 * Verifies the AGP device hasn't been acquired before and calls
7ab98401 101 * \c agp_backend_acquire.
1da177e4 102 */
04dfe19a 103int drm_legacy_agp_acquire(struct drm_device *dev)
1da177e4 104{
36b73b05
TZ
105 struct pci_dev *pdev = to_pci_dev(dev->dev);
106
1da177e4
LT
107 if (!dev->agp)
108 return -ENODEV;
109 if (dev->agp->acquired)
110 return -EBUSY;
36b73b05 111 dev->agp->bridge = agp_backend_acquire(pdev);
182e61d1 112 if (!dev->agp->bridge)
1da177e4
LT
113 return -ENODEV;
114 dev->agp->acquired = 1;
115 return 0;
116}
04dfe19a 117EXPORT_SYMBOL(drm_legacy_agp_acquire);
1da177e4 118
cec7638b 119/*
7ab98401 120 * Acquire the AGP device (ioctl).
1da177e4 121 *
1da177e4
LT
122 * \return zero on success or a negative number on failure.
123 *
7ab98401
DA
124 * Verifies the AGP device hasn't been acquired before and calls
125 * \c agp_backend_acquire.
1da177e4 126 */
04dfe19a
TZ
127int drm_legacy_agp_acquire_ioctl(struct drm_device *dev, void *data,
128 struct drm_file *file_priv)
1da177e4 129{
04dfe19a 130 return drm_legacy_agp_acquire((struct drm_device *)file_priv->minor->dev);
7ab98401 131}
1da177e4 132
cec7638b 133/*
7ab98401
DA
134 * Release the AGP device.
135 *
d985c108 136 * \param dev DRM device that is to release AGP.
7ab98401
DA
137 * \return zero on success or a negative number on failure.
138 *
139 * Verifies the AGP device has been acquired and calls \c agp_backend_release.
140 */
04dfe19a 141int drm_legacy_agp_release(struct drm_device *dev)
7ab98401 142{
1da177e4
LT
143 if (!dev->agp || !dev->agp->acquired)
144 return -EINVAL;
145 agp_backend_release(dev->agp->bridge);
146 dev->agp->acquired = 0;
147 return 0;
1da177e4 148}
04dfe19a 149EXPORT_SYMBOL(drm_legacy_agp_release);
1da177e4 150
04dfe19a
TZ
151int drm_legacy_agp_release_ioctl(struct drm_device *dev, void *data,
152 struct drm_file *file_priv)
1da177e4 153{
04dfe19a 154 return drm_legacy_agp_release(dev);
1da177e4
LT
155}
156
cec7638b 157/*
1da177e4 158 * Enable the AGP bus.
b5e89ed5 159 *
7ab98401
DA
160 * \param dev DRM device that has previously acquired AGP.
161 * \param mode Requested AGP mode.
1da177e4
LT
162 * \return zero on success or a negative number on failure.
163 *
164 * Verifies the AGP device has been acquired but not enabled, and calls
7ab98401 165 * \c agp_enable.
1da177e4 166 */
04dfe19a 167int drm_legacy_agp_enable(struct drm_device *dev, struct drm_agp_mode mode)
1da177e4 168{
1da177e4
LT
169 if (!dev->agp || !dev->agp->acquired)
170 return -EINVAL;
171
b5e89ed5 172 dev->agp->mode = mode.mode;
1da177e4 173 agp_enable(dev->agp->bridge, mode.mode);
1da177e4
LT
174 dev->agp->enabled = 1;
175 return 0;
176}
04dfe19a 177EXPORT_SYMBOL(drm_legacy_agp_enable);
7ab98401 178
04dfe19a
TZ
179int drm_legacy_agp_enable_ioctl(struct drm_device *dev, void *data,
180 struct drm_file *file_priv)
7ab98401 181{
c153f45f 182 struct drm_agp_mode *mode = data;
7ab98401 183
04dfe19a 184 return drm_legacy_agp_enable(dev, *mode);
7ab98401 185}
1da177e4 186
cec7638b 187/*
1da177e4
LT
188 * Allocate AGP memory.
189 *
1da177e4 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 */
04dfe19a 195int drm_legacy_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
b8c8a859 208 pages = DIV_ROUND_UP(request->size, PAGE_SIZE);
efa58395 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}
04dfe19a 227EXPORT_SYMBOL(drm_legacy_agp_alloc);
efa58395 228
efa58395 229
04dfe19a 230int drm_legacy_agp_alloc_ioctl(struct drm_device *dev, void *data,
c153f45f
EA
231 struct drm_file *file_priv)
232{
233 struct drm_agp_buffer *request = data;
efa58395 234
04dfe19a 235 return drm_legacy_agp_alloc(dev, request);
1da177e4
LT
236}
237
cec7638b 238/*
1da177e4
LT
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 */
04dfe19a
TZ
247static struct drm_agp_mem *drm_legacy_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
cec7638b 259/*
1da177e4
LT
260 * Unbind AGP memory from the GATT (ioctl).
261 *
1da177e4
LT
262 * \return zero on success or a negative number on failure.
263 *
264 * Verifies the AGP device is present and acquired, looks-up the AGP memory
265 * entry and passes it to the unbind_agp() function.
266 */
04dfe19a 267int drm_legacy_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request)
1da177e4 268{
55910517 269 struct drm_agp_mem *entry;
1da177e4
LT
270 int ret;
271
272 if (!dev->agp || !dev->agp->acquired)
273 return -EINVAL;
04dfe19a 274 entry = drm_legacy_agp_lookup_entry(dev, request->handle);
182e61d1 275 if (!entry || !entry->bound)
1da177e4 276 return -EINVAL;
ff28a9f8 277 ret = agp_unbind_memory(entry->memory);
1da177e4 278 if (ret == 0)
b5e89ed5 279 entry->bound = 0;
1da177e4
LT
280 return ret;
281}
04dfe19a 282EXPORT_SYMBOL(drm_legacy_agp_unbind);
efa58395 283
efa58395 284
04dfe19a
TZ
285int drm_legacy_agp_unbind_ioctl(struct drm_device *dev, void *data,
286 struct drm_file *file_priv)
c153f45f
EA
287{
288 struct drm_agp_binding *request = data;
efa58395 289
04dfe19a 290 return drm_legacy_agp_unbind(dev, request);
efa58395 291}
1da177e4 292
cec7638b 293/*
1da177e4
LT
294 * Bind AGP memory into the GATT (ioctl)
295 *
1da177e4
LT
296 * \return zero on success or a negative number on failure.
297 *
298 * Verifies the AGP device is present and has been acquired and that no memory
299 * is currently bound into the GATT. Looks-up the AGP memory entry and passes
300 * it to bind_agp() function.
301 */
04dfe19a 302int drm_legacy_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
1da177e4 303{
55910517 304 struct drm_agp_mem *entry;
b5e89ed5
DA
305 int retcode;
306 int page;
1da177e4
LT
307
308 if (!dev->agp || !dev->agp->acquired)
309 return -EINVAL;
04dfe19a 310 entry = drm_legacy_agp_lookup_entry(dev, request->handle);
182e61d1 311 if (!entry || entry->bound)
1da177e4 312 return -EINVAL;
b8c8a859 313 page = DIV_ROUND_UP(request->offset, PAGE_SIZE);
ff28a9f8 314 retcode = agp_bind_memory(entry->memory, page);
182e61d1 315 if (retcode)
1da177e4
LT
316 return retcode;
317 entry->bound = dev->agp->base + (page << PAGE_SHIFT);
318 DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n",
319 dev->agp->base, entry->bound);
320 return 0;
321}
04dfe19a 322EXPORT_SYMBOL(drm_legacy_agp_bind);
efa58395 323
efa58395 324
04dfe19a
TZ
325int drm_legacy_agp_bind_ioctl(struct drm_device *dev, void *data,
326 struct drm_file *file_priv)
c153f45f
EA
327{
328 struct drm_agp_binding *request = data;
efa58395 329
04dfe19a 330 return drm_legacy_agp_bind(dev, request);
efa58395 331}
1da177e4 332
cec7638b 333/*
1da177e4
LT
334 * Free AGP memory (ioctl).
335 *
1da177e4
LT
336 * \return zero on success or a negative number on failure.
337 *
338 * Verifies the AGP device is present and has been acquired and looks up the
1e55a53a 339 * AGP memory entry. If the memory is currently bound, unbind it via
1da177e4
LT
340 * unbind_agp(). Frees it via free_agp() as well as the entry itself
341 * and unlinks from the doubly linked list it's inserted in.
342 */
04dfe19a 343int drm_legacy_agp_free(struct drm_device *dev, struct drm_agp_buffer *request)
1da177e4 344{
55910517 345 struct drm_agp_mem *entry;
1da177e4
LT
346
347 if (!dev->agp || !dev->agp->acquired)
348 return -EINVAL;
04dfe19a 349 entry = drm_legacy_agp_lookup_entry(dev, request->handle);
182e61d1 350 if (!entry)
1da177e4
LT
351 return -EINVAL;
352 if (entry->bound)
ff28a9f8 353 agp_unbind_memory(entry->memory);
1da177e4 354
bd1b331f 355 list_del(&entry->head);
1da177e4 356
ff28a9f8 357 agp_free_memory(entry->memory);
9a298b2a 358 kfree(entry);
1da177e4
LT
359 return 0;
360}
04dfe19a 361EXPORT_SYMBOL(drm_legacy_agp_free);
efa58395 362
efa58395 363
04dfe19a
TZ
364int drm_legacy_agp_free_ioctl(struct drm_device *dev, void *data,
365 struct drm_file *file_priv)
c153f45f
EA
366{
367 struct drm_agp_buffer *request = data;
368
04dfe19a 369 return drm_legacy_agp_free(dev, request);
efa58395 370}
1da177e4 371
cec7638b 372/*
1da177e4
LT
373 * Initialize the AGP resources.
374 *
375 * \return pointer to a drm_agp_head structure.
376 *
d985c108
DA
377 * Gets the drm_agp_t structure which is made available by the agpgart module
378 * via the inter_module_* functions. Creates and initializes a drm_agp_head
379 * structure.
d6e4b28b
DV
380 *
381 * Note that final cleanup of the kmalloced structure is directly done in
382 * drm_pci_agp_destroy.
1da177e4 383 */
04dfe19a 384struct drm_agp_head *drm_legacy_agp_init(struct drm_device *dev)
1da177e4 385{
36b73b05 386 struct pci_dev *pdev = to_pci_dev(dev->dev);
55910517 387 struct drm_agp_head *head = NULL;
1da177e4 388
182e61d1
MM
389 head = kzalloc(sizeof(*head), GFP_KERNEL);
390 if (!head)
1da177e4 391 return NULL;
36b73b05 392 head->bridge = agp_find_bridge(pdev);
1da177e4 393 if (!head->bridge) {
36b73b05 394 head->bridge = agp_backend_acquire(pdev);
182e61d1 395 if (!head->bridge) {
9a298b2a 396 kfree(head);
1da177e4
LT
397 return NULL;
398 }
399 agp_copy_info(head->bridge, &head->agp_info);
400 agp_backend_release(head->bridge);
401 } else {
402 agp_copy_info(head->bridge, &head->agp_info);
403 }
404 if (head->agp_info.chipset == NOT_SUPPORTED) {
9a298b2a 405 kfree(head);
1da177e4
LT
406 return NULL;
407 }
bd1b331f 408 INIT_LIST_HEAD(&head->memory);
1da177e4
LT
409 head->cant_use_aperture = head->agp_info.cant_use_aperture;
410 head->page_mask = head->agp_info.page_mask;
8b409580 411 head->base = head->agp_info.aper_base;
1da177e4
LT
412 return head;
413}
49d66d8d 414/* Only exported for i810.ko */
04dfe19a 415EXPORT_SYMBOL(drm_legacy_agp_init);
1da177e4 416
28ec711c 417/**
366884b1 418 * drm_legacy_agp_clear - Clear AGP resource list
28ec711c
DH
419 * @dev: DRM device
420 *
421 * Iterate over all AGP resources and remove them. But keep the AGP head
422 * intact so it can still be used. It is safe to call this if AGP is disabled or
423 * was already removed.
424 *
fa538645 425 * Cleanup is only done for drivers who have DRIVER_LEGACY set.
28ec711c 426 */
366884b1 427void drm_legacy_agp_clear(struct drm_device *dev)
28ec711c
DH
428{
429 struct drm_agp_mem *entry, *tempe;
430
d9906753 431 if (!dev->agp)
28ec711c 432 return;
fa538645 433 if (!drm_core_check_feature(dev, DRIVER_LEGACY))
28ec711c
DH
434 return;
435
436 list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) {
437 if (entry->bound)
ff28a9f8
TZ
438 agp_unbind_memory(entry->memory);
439 agp_free_memory(entry->memory);
28ec711c
DH
440 kfree(entry);
441 }
442 INIT_LIST_HEAD(&dev->agp->memory);
443
444 if (dev->agp->acquired)
04dfe19a 445 drm_legacy_agp_release(dev);
28ec711c
DH
446
447 dev->agp->acquired = 0;
448 dev->agp->enabled = 0;
449}
04dfe19a
TZ
450
451#endif