Commit | Line | Data |
---|---|---|
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 | 59 | int 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 | 79 | EXPORT_SYMBOL(drm_legacy_agp_info); |
7ab98401 | 80 | |
04dfe19a TZ |
81 | int 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 | 103 | int 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 | 117 | EXPORT_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 |
127 | int 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 | 141 | int 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 | 149 | EXPORT_SYMBOL(drm_legacy_agp_release); |
1da177e4 | 150 | |
04dfe19a TZ |
151 | int 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 | 167 | int 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 | 177 | EXPORT_SYMBOL(drm_legacy_agp_enable); |
7ab98401 | 178 | |
04dfe19a TZ |
179 | int 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 | 195 | int 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 | 227 | EXPORT_SYMBOL(drm_legacy_agp_alloc); |
efa58395 | 228 | |
efa58395 | 229 | |
04dfe19a | 230 | int 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 |
247 | static 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 | 267 | int 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 | 282 | EXPORT_SYMBOL(drm_legacy_agp_unbind); |
efa58395 | 283 | |
efa58395 | 284 | |
04dfe19a TZ |
285 | int 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 | 302 | int 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 | 322 | EXPORT_SYMBOL(drm_legacy_agp_bind); |
efa58395 | 323 | |
efa58395 | 324 | |
04dfe19a TZ |
325 | int 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 | 343 | int 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 | 361 | EXPORT_SYMBOL(drm_legacy_agp_free); |
efa58395 | 362 | |
efa58395 | 363 | |
04dfe19a TZ |
364 | int 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 | 384 | struct 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 | 415 | EXPORT_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 | 427 | void 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 |