Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_bufs.c |
1da177e4 | 3 | * Generic buffer template |
b5e89ed5 | 4 | * |
1da177e4 LT |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com | |
11 | * | |
12 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. | |
13 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
14 | * All Rights Reserved. | |
15 | * | |
16 | * Permission is hereby granted, free of charge, to any person obtaining a | |
17 | * copy of this software and associated documentation files (the "Software"), | |
18 | * to deal in the Software without restriction, including without limitation | |
19 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
20 | * and/or sell copies of the Software, and to permit persons to whom the | |
21 | * Software is furnished to do so, subject to the following conditions: | |
22 | * | |
23 | * The above copyright notice and this permission notice (including the next | |
24 | * paragraph) shall be included in all copies or substantial portions of the | |
25 | * Software. | |
26 | * | |
27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
28 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
29 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
30 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
31 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
32 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
33 | * OTHER DEALINGS IN THE SOFTWARE. | |
34 | */ | |
35 | ||
36 | #include <linux/vmalloc.h> | |
37 | #include "drmP.h" | |
38 | ||
84b1fd10 | 39 | unsigned long drm_get_resource_start(struct drm_device *dev, unsigned int resource) |
1da177e4 | 40 | { |
836cf046 DA |
41 | return pci_resource_start(dev->pdev, resource); |
42 | } | |
43 | EXPORT_SYMBOL(drm_get_resource_start); | |
1da177e4 | 44 | |
84b1fd10 | 45 | unsigned long drm_get_resource_len(struct drm_device *dev, unsigned int resource) |
836cf046 DA |
46 | { |
47 | return pci_resource_len(dev->pdev, resource); | |
48 | } | |
b5e89ed5 | 49 | |
836cf046 | 50 | EXPORT_SYMBOL(drm_get_resource_len); |
1da177e4 | 51 | |
55910517 | 52 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
d985c108 | 53 | drm_local_map_t *map) |
836cf046 | 54 | { |
55910517 | 55 | struct drm_map_list *entry; |
bd1b331f | 56 | list_for_each_entry(entry, &dev->maplist, head) { |
836cf046 | 57 | if (entry->map && map->type == entry->map->type && |
54ba2f76 DA |
58 | ((entry->map->offset == map->offset) || |
59 | (map->type == _DRM_SHM && map->flags==_DRM_CONTAINS_LOCK))) { | |
89625eb1 | 60 | return entry; |
836cf046 DA |
61 | } |
62 | } | |
63 | ||
64 | return NULL; | |
1da177e4 | 65 | } |
1da177e4 | 66 | |
e0be428e | 67 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
fb41e54b | 68 | unsigned long user_token, int hashed_handle) |
d1f2b55a | 69 | { |
8d153f71 | 70 | int use_hashed_handle; |
c2604ce0 | 71 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
72 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
73 | #elif (BITS_PER_LONG == 32) | |
74 | use_hashed_handle = hashed_handle; | |
75 | #else | |
76 | #error Unsupported long size. Neither 64 nor 32 bits. | |
77 | #endif | |
d1f2b55a | 78 | |
e08870c8 TH |
79 | if (!use_hashed_handle) { |
80 | int ret; | |
1545085a | 81 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
82 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
83 | if (ret != -EINVAL) | |
84 | return ret; | |
d1f2b55a | 85 | } |
e08870c8 TH |
86 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
87 | user_token, 32 - PAGE_SHIFT - 3, | |
1545085a | 88 | 0, DRM_MAP_HASH_OFFSET >> PAGE_SHIFT); |
d1f2b55a | 89 | } |
9a186645 | 90 | |
1da177e4 LT |
91 | /** |
92 | * Ioctl to specify a range of memory that is available for mapping by a non-root process. | |
93 | * | |
94 | * \param inode device inode. | |
6c340eac | 95 | * \param file_priv DRM file private. |
1da177e4 LT |
96 | * \param cmd command. |
97 | * \param arg pointer to a drm_map structure. | |
98 | * \return zero on success or a negative value on error. | |
99 | * | |
100 | * Adjusts the memory offset to its absolute value according to the mapping | |
101 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
102 | * applicable and if supported by the kernel. | |
103 | */ | |
84b1fd10 | 104 | static int drm_addmap_core(struct drm_device * dev, unsigned int offset, |
c60ce623 | 105 | unsigned int size, enum drm_map_type type, |
55910517 DA |
106 | enum drm_map_flags flags, |
107 | struct drm_map_list ** maplist) | |
1da177e4 | 108 | { |
c60ce623 | 109 | struct drm_map *map; |
55910517 | 110 | struct drm_map_list *list; |
9c8da5eb | 111 | drm_dma_handle_t *dmah; |
8d153f71 TH |
112 | unsigned long user_token; |
113 | int ret; | |
1da177e4 | 114 | |
b5e89ed5 DA |
115 | map = drm_alloc(sizeof(*map), DRM_MEM_MAPS); |
116 | if (!map) | |
1da177e4 LT |
117 | return -ENOMEM; |
118 | ||
7ab98401 DA |
119 | map->offset = offset; |
120 | map->size = size; | |
121 | map->flags = flags; | |
122 | map->type = type; | |
1da177e4 LT |
123 | |
124 | /* Only allow shared memory to be removable since we only keep enough | |
125 | * book keeping information about shared memory to allow for removal | |
126 | * when processes fork. | |
127 | */ | |
b5e89ed5 DA |
128 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
129 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
130 | return -EINVAL; |
131 | } | |
b5e89ed5 DA |
132 | DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n", |
133 | map->offset, map->size, map->type); | |
134 | if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) { | |
135 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
136 | return -EINVAL; |
137 | } | |
b5e89ed5 | 138 | map->mtrr = -1; |
1da177e4 LT |
139 | map->handle = NULL; |
140 | ||
b5e89ed5 | 141 | switch (map->type) { |
1da177e4 LT |
142 | case _DRM_REGISTERS: |
143 | case _DRM_FRAME_BUFFER: | |
88f399cd | 144 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) |
8d2ea625 | 145 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 DA |
146 | map->offset < virt_to_phys(high_memory)) { |
147 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
148 | return -EINVAL; |
149 | } | |
150 | #endif | |
151 | #ifdef __alpha__ | |
152 | map->offset += dev->hose->mem_space->start; | |
153 | #endif | |
836cf046 DA |
154 | /* Some drivers preinitialize some maps, without the X Server |
155 | * needing to be aware of it. Therefore, we just return success | |
156 | * when the server tries to create a duplicate map. | |
157 | */ | |
89625eb1 DA |
158 | list = drm_find_matching_map(dev, map); |
159 | if (list != NULL) { | |
160 | if (list->map->size != map->size) { | |
836cf046 | 161 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
162 | "mismatched sizes, (%ld vs %ld)\n", |
163 | map->type, map->size, | |
164 | list->map->size); | |
89625eb1 | 165 | list->map->size = map->size; |
836cf046 DA |
166 | } |
167 | ||
168 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
89625eb1 | 169 | *maplist = list; |
836cf046 DA |
170 | return 0; |
171 | } | |
172 | ||
1da177e4 | 173 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
174 | if (map->type == _DRM_FRAME_BUFFER || |
175 | (map->flags & _DRM_WRITE_COMBINING)) { | |
176 | map->mtrr = mtrr_add(map->offset, map->size, | |
177 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
178 | } |
179 | } | |
0769d39c | 180 | if (map->type == _DRM_REGISTERS) { |
004a7727 | 181 | map->handle = ioremap(map->offset, map->size); |
0769d39c ST |
182 | if (!map->handle) { |
183 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
184 | return -ENOMEM; | |
185 | } | |
186 | } | |
bc5f4523 | 187 | |
1da177e4 | 188 | break; |
1da177e4 | 189 | case _DRM_SHM: |
54ba2f76 DA |
190 | list = drm_find_matching_map(dev, map); |
191 | if (list != NULL) { | |
192 | if(list->map->size != map->size) { | |
193 | DRM_DEBUG("Matching maps of type %d with " | |
194 | "mismatched sizes, (%ld vs %ld)\n", | |
195 | map->type, map->size, list->map->size); | |
196 | list->map->size = map->size; | |
197 | } | |
198 | ||
199 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
200 | *maplist = list; | |
201 | return 0; | |
202 | } | |
f239b7b0 | 203 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
204 | DRM_DEBUG("%lu %d %p\n", |
205 | map->size, drm_order(map->size), map->handle); | |
206 | if (!map->handle) { | |
207 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
208 | return -ENOMEM; |
209 | } | |
210 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 211 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 LT |
212 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
213 | if (dev->lock.hw_lock != NULL) { | |
b5e89ed5 DA |
214 | vfree(map->handle); |
215 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
216 | return -EBUSY; |
217 | } | |
b5e89ed5 | 218 | dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
219 | } |
220 | break; | |
54ba2f76 | 221 | case _DRM_AGP: { |
55910517 | 222 | struct drm_agp_mem *entry; |
54ba2f76 DA |
223 | int valid = 0; |
224 | ||
225 | if (!drm_core_has_AGP(dev)) { | |
226 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
227 | return -EINVAL; | |
228 | } | |
1da177e4 | 229 | #ifdef __alpha__ |
54ba2f76 | 230 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 231 | #endif |
54ba2f76 DA |
232 | /* Note: dev->agp->base may actually be 0 when the DRM |
233 | * is not in control of AGP space. But if user space is | |
234 | * it should already have added the AGP base itself. | |
235 | */ | |
236 | map->offset += dev->agp->base; | |
237 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ | |
238 | ||
239 | /* This assumes the DRM is in total control of AGP space. | |
240 | * It's not always the case as AGP can be in the control | |
241 | * of user space (i.e. i810 driver). So this loop will get | |
242 | * skipped and we double check that dev->agp->memory is | |
243 | * actually set as well as being invalid before EPERM'ing | |
244 | */ | |
bd1b331f | 245 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
246 | if ((map->offset >= entry->bound) && |
247 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
248 | valid = 1; | |
249 | break; | |
250 | } | |
1da177e4 | 251 | } |
bd1b331f | 252 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
253 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
254 | return -EPERM; | |
255 | } | |
256 | DRM_DEBUG("AGP offset = 0x%08lx, size = 0x%08lx\n", map->offset, map->size); | |
257 | ||
1da177e4 | 258 | break; |
54ba2f76 | 259 | } |
1da177e4 LT |
260 | case _DRM_SCATTER_GATHER: |
261 | if (!dev->sg) { | |
262 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
263 | return -EINVAL; | |
264 | } | |
d1f2b55a | 265 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 266 | break; |
b5e89ed5 | 267 | case _DRM_CONSISTENT: |
2d0f9eaf | 268 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 269 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
270 | * casting it down to 32 bits is no problem, but we |
271 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
272 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
273 | if (!dmah) { | |
2d0f9eaf DA |
274 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
275 | return -ENOMEM; | |
276 | } | |
9c8da5eb DA |
277 | map->handle = dmah->vaddr; |
278 | map->offset = (unsigned long)dmah->busaddr; | |
279 | kfree(dmah); | |
2d0f9eaf | 280 | break; |
1da177e4 | 281 | default: |
b5e89ed5 | 282 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
283 | return -EINVAL; |
284 | } | |
285 | ||
286 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); | |
b5e89ed5 | 287 | if (!list) { |
85abb3f9 | 288 | if (map->type == _DRM_REGISTERS) |
004a7727 | 289 | iounmap(map->handle); |
1da177e4 LT |
290 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
291 | return -EINVAL; | |
292 | } | |
293 | memset(list, 0, sizeof(*list)); | |
294 | list->map = map; | |
295 | ||
30e2fb18 | 296 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 297 | list_add(&list->head, &dev->maplist); |
8d153f71 | 298 | |
d1f2b55a | 299 | /* Assign a 32-bit handle */ |
30e2fb18 | 300 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
301 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
302 | map->offset; | |
a1d0fcf5 | 303 | ret = drm_map_handle(dev, &list->hash, user_token, 0); |
8d153f71 | 304 | if (ret) { |
85abb3f9 | 305 | if (map->type == _DRM_REGISTERS) |
004a7727 | 306 | iounmap(map->handle); |
8d153f71 TH |
307 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
308 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); | |
309 | mutex_unlock(&dev->struct_mutex); | |
310 | return ret; | |
311 | } | |
312 | ||
1545085a | 313 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 314 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 315 | |
89625eb1 | 316 | *maplist = list; |
7ab98401 | 317 | return 0; |
54ba2f76 | 318 | } |
89625eb1 | 319 | |
84b1fd10 | 320 | int drm_addmap(struct drm_device * dev, unsigned int offset, |
c60ce623 DA |
321 | unsigned int size, enum drm_map_type type, |
322 | enum drm_map_flags flags, drm_local_map_t ** map_ptr) | |
89625eb1 | 323 | { |
55910517 | 324 | struct drm_map_list *list; |
89625eb1 DA |
325 | int rc; |
326 | ||
327 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
328 | if (!rc) | |
329 | *map_ptr = list->map; | |
330 | return rc; | |
331 | } | |
b5e89ed5 | 332 | |
7ab98401 DA |
333 | EXPORT_SYMBOL(drm_addmap); |
334 | ||
c153f45f EA |
335 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
336 | struct drm_file *file_priv) | |
7ab98401 | 337 | { |
c153f45f | 338 | struct drm_map *map = data; |
55910517 | 339 | struct drm_map_list *maplist; |
7ab98401 DA |
340 | int err; |
341 | ||
c153f45f | 342 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP)) |
d985c108 DA |
343 | return -EPERM; |
344 | ||
c153f45f EA |
345 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
346 | map->flags, &maplist); | |
7ab98401 | 347 | |
b5e89ed5 | 348 | if (err) |
7ab98401 | 349 | return err; |
d1f2b55a | 350 | |
67e1a014 | 351 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 352 | map->handle = (void *)(unsigned long)maplist->user_token; |
1da177e4 | 353 | return 0; |
88f399cd | 354 | } |
1da177e4 | 355 | |
1da177e4 LT |
356 | /** |
357 | * Remove a map private from list and deallocate resources if the mapping | |
358 | * isn't in use. | |
359 | * | |
360 | * \param inode device inode. | |
6c340eac | 361 | * \param file_priv DRM file private. |
1da177e4 | 362 | * \param cmd command. |
c60ce623 | 363 | * \param arg pointer to a struct drm_map structure. |
1da177e4 LT |
364 | * \return zero on success or a negative value on error. |
365 | * | |
366 | * Searches the map on drm_device::maplist, removes it from the list, see if | |
367 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
368 | * being on use. | |
369 | * | |
7ab98401 | 370 | * \sa drm_addmap |
1da177e4 | 371 | */ |
84b1fd10 | 372 | int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map) |
1da177e4 | 373 | { |
55910517 | 374 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 375 | drm_dma_handle_t dmah; |
bd1b331f | 376 | int found = 0; |
1da177e4 | 377 | |
836cf046 | 378 | /* Find the list entry for the map and remove it */ |
bd1b331f | 379 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 380 | if (r_list->map == map) { |
bd1b331f | 381 | list_del(&r_list->head); |
1545085a TH |
382 | drm_ht_remove_key(&dev->map_hash, |
383 | r_list->user_token >> PAGE_SHIFT); | |
bd1b331f DA |
384 | drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS); |
385 | found = 1; | |
836cf046 DA |
386 | break; |
387 | } | |
1da177e4 LT |
388 | } |
389 | ||
bd1b331f | 390 | if (!found) |
1da177e4 | 391 | return -EINVAL; |
1da177e4 | 392 | |
836cf046 DA |
393 | switch (map->type) { |
394 | case _DRM_REGISTERS: | |
004a7727 | 395 | iounmap(map->handle); |
836cf046 DA |
396 | /* FALLTHROUGH */ |
397 | case _DRM_FRAME_BUFFER: | |
398 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
399 | int retcode; | |
b5e89ed5 DA |
400 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
401 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 402 | } |
836cf046 DA |
403 | break; |
404 | case _DRM_SHM: | |
405 | vfree(map->handle); | |
406 | break; | |
407 | case _DRM_AGP: | |
408 | case _DRM_SCATTER_GATHER: | |
409 | break; | |
410 | case _DRM_CONSISTENT: | |
411 | dmah.vaddr = map->handle; | |
412 | dmah.busaddr = map->offset; | |
413 | dmah.size = map->size; | |
414 | __drm_pci_free(dev, &dmah); | |
415 | break; | |
1da177e4 | 416 | } |
836cf046 DA |
417 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
418 | ||
1da177e4 LT |
419 | return 0; |
420 | } | |
836cf046 | 421 | |
84b1fd10 | 422 | int drm_rmmap(struct drm_device *dev, drm_local_map_t *map) |
836cf046 DA |
423 | { |
424 | int ret; | |
425 | ||
30e2fb18 | 426 | mutex_lock(&dev->struct_mutex); |
836cf046 | 427 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 428 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
429 | |
430 | return ret; | |
431 | } | |
ba8bbcf6 | 432 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 433 | |
836cf046 DA |
434 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
435 | * the last close of the device, and this is necessary for cleanup when things | |
436 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
437 | * like a pointless exercise since they're going away anyway. | |
438 | * | |
439 | * One use case might be after addmap is allowed for normal users for SHM and | |
440 | * gets used by drivers that the server doesn't need to care about. This seems | |
441 | * unlikely. | |
442 | */ | |
c153f45f EA |
443 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
444 | struct drm_file *file_priv) | |
7ab98401 | 445 | { |
c153f45f | 446 | struct drm_map *request = data; |
836cf046 | 447 | drm_local_map_t *map = NULL; |
55910517 | 448 | struct drm_map_list *r_list; |
836cf046 | 449 | int ret; |
7ab98401 | 450 | |
30e2fb18 | 451 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 452 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 453 | if (r_list->map && |
c153f45f | 454 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
455 | r_list->map->flags & _DRM_REMOVABLE) { |
456 | map = r_list->map; | |
457 | break; | |
458 | } | |
459 | } | |
460 | ||
461 | /* List has wrapped around to the head pointer, or its empty we didn't | |
462 | * find anything. | |
463 | */ | |
bd1b331f | 464 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 465 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
466 | return -EINVAL; |
467 | } | |
468 | ||
836cf046 DA |
469 | /* Register and framebuffer maps are permanent */ |
470 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 471 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
472 | return 0; |
473 | } | |
474 | ||
475 | ret = drm_rmmap_locked(dev, map); | |
476 | ||
30e2fb18 | 477 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
478 | |
479 | return ret; | |
7ab98401 | 480 | } |
1da177e4 LT |
481 | |
482 | /** | |
483 | * Cleanup after an error on one of the addbufs() functions. | |
484 | * | |
836cf046 | 485 | * \param dev DRM device. |
1da177e4 LT |
486 | * \param entry buffer entry where the error occurred. |
487 | * | |
488 | * Frees any pages and buffers associated with the given entry. | |
489 | */ | |
cdd55a29 DA |
490 | static void drm_cleanup_buf_error(struct drm_device * dev, |
491 | struct drm_buf_entry * entry) | |
1da177e4 LT |
492 | { |
493 | int i; | |
494 | ||
495 | if (entry->seg_count) { | |
496 | for (i = 0; i < entry->seg_count; i++) { | |
497 | if (entry->seglist[i]) { | |
ddf19b97 | 498 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
499 | } |
500 | } | |
501 | drm_free(entry->seglist, | |
b5e89ed5 DA |
502 | entry->seg_count * |
503 | sizeof(*entry->seglist), DRM_MEM_SEGS); | |
1da177e4 LT |
504 | |
505 | entry->seg_count = 0; | |
506 | } | |
507 | ||
b5e89ed5 DA |
508 | if (entry->buf_count) { |
509 | for (i = 0; i < entry->buf_count; i++) { | |
1da177e4 LT |
510 | if (entry->buflist[i].dev_private) { |
511 | drm_free(entry->buflist[i].dev_private, | |
b5e89ed5 DA |
512 | entry->buflist[i].dev_priv_size, |
513 | DRM_MEM_BUFS); | |
1da177e4 LT |
514 | } |
515 | } | |
516 | drm_free(entry->buflist, | |
b5e89ed5 DA |
517 | entry->buf_count * |
518 | sizeof(*entry->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
519 | |
520 | entry->buf_count = 0; | |
521 | } | |
522 | } | |
523 | ||
524 | #if __OS_HAS_AGP | |
525 | /** | |
d59431bf | 526 | * Add AGP buffers for DMA transfers. |
1da177e4 | 527 | * |
84b1fd10 | 528 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 529 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 530 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 531 | * |
1da177e4 LT |
532 | * After some sanity checks creates a drm_buf structure for each buffer and |
533 | * reallocates the buffer list of the same size order to accommodate the new | |
534 | * buffers. | |
535 | */ | |
84b1fd10 | 536 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 537 | { |
cdd55a29 DA |
538 | struct drm_device_dma *dma = dev->dma; |
539 | struct drm_buf_entry *entry; | |
55910517 | 540 | struct drm_agp_mem *agp_entry; |
056219e2 | 541 | struct drm_buf *buf; |
1da177e4 LT |
542 | unsigned long offset; |
543 | unsigned long agp_offset; | |
544 | int count; | |
545 | int order; | |
546 | int size; | |
547 | int alignment; | |
548 | int page_order; | |
549 | int total; | |
550 | int byte_count; | |
54ba2f76 | 551 | int i, valid; |
056219e2 | 552 | struct drm_buf **temp_buflist; |
1da177e4 | 553 | |
b5e89ed5 DA |
554 | if (!dma) |
555 | return -EINVAL; | |
1da177e4 | 556 | |
d59431bf DA |
557 | count = request->count; |
558 | order = drm_order(request->size); | |
1da177e4 LT |
559 | size = 1 << order; |
560 | ||
b5e89ed5 DA |
561 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
562 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
563 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
564 | total = PAGE_SIZE << page_order; | |
565 | ||
566 | byte_count = 0; | |
d59431bf | 567 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 568 | |
b5e89ed5 DA |
569 | DRM_DEBUG("count: %d\n", count); |
570 | DRM_DEBUG("order: %d\n", order); | |
571 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 572 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
573 | DRM_DEBUG("alignment: %d\n", alignment); |
574 | DRM_DEBUG("page_order: %d\n", page_order); | |
575 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 576 | |
b5e89ed5 DA |
577 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
578 | return -EINVAL; | |
579 | if (dev->queue_count) | |
580 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 581 | |
54ba2f76 DA |
582 | /* Make sure buffers are located in AGP memory that we own */ |
583 | valid = 0; | |
bd1b331f | 584 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
585 | if ((agp_offset >= agp_entry->bound) && |
586 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
587 | valid = 1; | |
588 | break; | |
589 | } | |
590 | } | |
bd1b331f | 591 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
592 | DRM_DEBUG("zone invalid\n"); |
593 | return -EINVAL; | |
594 | } | |
b5e89ed5 DA |
595 | spin_lock(&dev->count_lock); |
596 | if (dev->buf_use) { | |
597 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
598 | return -EBUSY; |
599 | } | |
b5e89ed5 DA |
600 | atomic_inc(&dev->buf_alloc); |
601 | spin_unlock(&dev->count_lock); | |
1da177e4 | 602 | |
30e2fb18 | 603 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 604 | entry = &dma->bufs[order]; |
b5e89ed5 | 605 | if (entry->buf_count) { |
30e2fb18 | 606 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
607 | atomic_dec(&dev->buf_alloc); |
608 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
609 | } |
610 | ||
611 | if (count < 0 || count > 4096) { | |
30e2fb18 | 612 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 613 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
614 | return -EINVAL; |
615 | } | |
616 | ||
b5e89ed5 DA |
617 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
618 | DRM_MEM_BUFS); | |
619 | if (!entry->buflist) { | |
30e2fb18 | 620 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 621 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
622 | return -ENOMEM; |
623 | } | |
b5e89ed5 | 624 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
625 | |
626 | entry->buf_size = size; | |
627 | entry->page_order = page_order; | |
628 | ||
629 | offset = 0; | |
630 | ||
b5e89ed5 DA |
631 | while (entry->buf_count < count) { |
632 | buf = &entry->buflist[entry->buf_count]; | |
633 | buf->idx = dma->buf_count + entry->buf_count; | |
634 | buf->total = alignment; | |
635 | buf->order = order; | |
636 | buf->used = 0; | |
1da177e4 | 637 | |
b5e89ed5 | 638 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
639 | buf->bus_address = agp_offset + offset; |
640 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 641 | buf->next = NULL; |
1da177e4 LT |
642 | buf->waiting = 0; |
643 | buf->pending = 0; | |
b5e89ed5 | 644 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 645 | buf->file_priv = NULL; |
1da177e4 LT |
646 | |
647 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
648 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
649 | if (!buf->dev_private) { | |
1da177e4 LT |
650 | /* Set count correctly so we free the proper amount. */ |
651 | entry->buf_count = count; | |
b5e89ed5 | 652 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 653 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 654 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
655 | return -ENOMEM; |
656 | } | |
b5e89ed5 | 657 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 658 | |
b5e89ed5 | 659 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
660 | |
661 | offset += alignment; | |
662 | entry->buf_count++; | |
663 | byte_count += PAGE_SIZE << page_order; | |
664 | } | |
665 | ||
b5e89ed5 | 666 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 667 | |
b5e89ed5 DA |
668 | temp_buflist = drm_realloc(dma->buflist, |
669 | dma->buf_count * sizeof(*dma->buflist), | |
670 | (dma->buf_count + entry->buf_count) | |
671 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
672 | if (!temp_buflist) { | |
1da177e4 | 673 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 674 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 675 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 676 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
677 | return -ENOMEM; |
678 | } | |
679 | dma->buflist = temp_buflist; | |
680 | ||
b5e89ed5 | 681 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
682 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
683 | } | |
684 | ||
685 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
686 | dma->seg_count += entry->seg_count; |
687 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
688 | dma->byte_count += byte_count; |
689 | ||
b5e89ed5 DA |
690 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
691 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 692 | |
30e2fb18 | 693 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 694 | |
d59431bf DA |
695 | request->count = entry->buf_count; |
696 | request->size = size; | |
1da177e4 LT |
697 | |
698 | dma->flags = _DRM_DMA_USE_AGP; | |
699 | ||
b5e89ed5 | 700 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
701 | return 0; |
702 | } | |
d84f76d3 | 703 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 704 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 705 | |
84b1fd10 | 706 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 707 | { |
cdd55a29 | 708 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
709 | int count; |
710 | int order; | |
711 | int size; | |
712 | int total; | |
713 | int page_order; | |
cdd55a29 | 714 | struct drm_buf_entry *entry; |
ddf19b97 | 715 | drm_dma_handle_t *dmah; |
056219e2 | 716 | struct drm_buf *buf; |
1da177e4 LT |
717 | int alignment; |
718 | unsigned long offset; | |
719 | int i; | |
720 | int byte_count; | |
721 | int page_count; | |
722 | unsigned long *temp_pagelist; | |
056219e2 | 723 | struct drm_buf **temp_buflist; |
1da177e4 | 724 | |
b5e89ed5 DA |
725 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
726 | return -EINVAL; | |
d985c108 | 727 | |
b5e89ed5 DA |
728 | if (!dma) |
729 | return -EINVAL; | |
1da177e4 | 730 | |
d985c108 DA |
731 | if (!capable(CAP_SYS_ADMIN)) |
732 | return -EPERM; | |
733 | ||
d59431bf DA |
734 | count = request->count; |
735 | order = drm_order(request->size); | |
1da177e4 LT |
736 | size = 1 << order; |
737 | ||
b5e89ed5 DA |
738 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
739 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 740 | |
b5e89ed5 DA |
741 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
742 | return -EINVAL; | |
743 | if (dev->queue_count) | |
744 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 745 | |
d59431bf | 746 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 747 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
748 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
749 | total = PAGE_SIZE << page_order; | |
750 | ||
b5e89ed5 DA |
751 | spin_lock(&dev->count_lock); |
752 | if (dev->buf_use) { | |
753 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
754 | return -EBUSY; |
755 | } | |
b5e89ed5 DA |
756 | atomic_inc(&dev->buf_alloc); |
757 | spin_unlock(&dev->count_lock); | |
1da177e4 | 758 | |
30e2fb18 | 759 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 760 | entry = &dma->bufs[order]; |
b5e89ed5 | 761 | if (entry->buf_count) { |
30e2fb18 | 762 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 763 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
764 | return -ENOMEM; /* May only call once for each order */ |
765 | } | |
766 | ||
767 | if (count < 0 || count > 4096) { | |
30e2fb18 | 768 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 769 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
770 | return -EINVAL; |
771 | } | |
772 | ||
b5e89ed5 DA |
773 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
774 | DRM_MEM_BUFS); | |
775 | if (!entry->buflist) { | |
30e2fb18 | 776 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 777 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
778 | return -ENOMEM; |
779 | } | |
b5e89ed5 DA |
780 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
781 | ||
782 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), | |
783 | DRM_MEM_SEGS); | |
784 | if (!entry->seglist) { | |
785 | drm_free(entry->buflist, | |
786 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
30e2fb18 | 787 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 788 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
789 | return -ENOMEM; |
790 | } | |
b5e89ed5 | 791 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
792 | |
793 | /* Keep the original pagelist until we know all the allocations | |
794 | * have succeeded | |
795 | */ | |
b5e89ed5 DA |
796 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
797 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
1da177e4 | 798 | if (!temp_pagelist) { |
b5e89ed5 DA |
799 | drm_free(entry->buflist, |
800 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
801 | drm_free(entry->seglist, | |
802 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); | |
30e2fb18 | 803 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 804 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
805 | return -ENOMEM; |
806 | } | |
807 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
808 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
809 | DRM_DEBUG("pagelist: %d entries\n", | |
810 | dma->page_count + (count << page_order)); | |
1da177e4 | 811 | |
b5e89ed5 | 812 | entry->buf_size = size; |
1da177e4 LT |
813 | entry->page_order = page_order; |
814 | byte_count = 0; | |
815 | page_count = 0; | |
816 | ||
b5e89ed5 | 817 | while (entry->buf_count < count) { |
bc5f4523 | 818 | |
ddf19b97 | 819 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); |
bc5f4523 | 820 | |
ddf19b97 | 821 | if (!dmah) { |
1da177e4 LT |
822 | /* Set count correctly so we free the proper amount. */ |
823 | entry->buf_count = count; | |
824 | entry->seg_count = count; | |
825 | drm_cleanup_buf_error(dev, entry); | |
b5e89ed5 DA |
826 | drm_free(temp_pagelist, |
827 | (dma->page_count + (count << page_order)) | |
828 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 829 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 830 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
831 | return -ENOMEM; |
832 | } | |
ddf19b97 | 833 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
834 | for (i = 0; i < (1 << page_order); i++) { |
835 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
836 | dma->page_count + page_count, | |
ddf19b97 | 837 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 838 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 839 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 840 | } |
b5e89ed5 DA |
841 | for (offset = 0; |
842 | offset + size <= total && entry->buf_count < count; | |
843 | offset += alignment, ++entry->buf_count) { | |
844 | buf = &entry->buflist[entry->buf_count]; | |
845 | buf->idx = dma->buf_count + entry->buf_count; | |
846 | buf->total = alignment; | |
847 | buf->order = order; | |
848 | buf->used = 0; | |
849 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
850 | buf->address = (void *)(dmah->vaddr + offset); |
851 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 852 | buf->next = NULL; |
1da177e4 LT |
853 | buf->waiting = 0; |
854 | buf->pending = 0; | |
b5e89ed5 | 855 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 856 | buf->file_priv = NULL; |
1da177e4 LT |
857 | |
858 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
859 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
860 | DRM_MEM_BUFS); | |
861 | if (!buf->dev_private) { | |
1da177e4 LT |
862 | /* Set count correctly so we free the proper amount. */ |
863 | entry->buf_count = count; | |
864 | entry->seg_count = count; | |
b5e89ed5 DA |
865 | drm_cleanup_buf_error(dev, entry); |
866 | drm_free(temp_pagelist, | |
867 | (dma->page_count + | |
868 | (count << page_order)) | |
869 | * sizeof(*dma->pagelist), | |
870 | DRM_MEM_PAGES); | |
30e2fb18 | 871 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 872 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
873 | return -ENOMEM; |
874 | } | |
b5e89ed5 | 875 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 876 | |
b5e89ed5 DA |
877 | DRM_DEBUG("buffer %d @ %p\n", |
878 | entry->buf_count, buf->address); | |
1da177e4 LT |
879 | } |
880 | byte_count += PAGE_SIZE << page_order; | |
881 | } | |
882 | ||
b5e89ed5 DA |
883 | temp_buflist = drm_realloc(dma->buflist, |
884 | dma->buf_count * sizeof(*dma->buflist), | |
885 | (dma->buf_count + entry->buf_count) | |
886 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
887 | if (!temp_buflist) { |
888 | /* Free the entry because it isn't valid */ | |
b5e89ed5 DA |
889 | drm_cleanup_buf_error(dev, entry); |
890 | drm_free(temp_pagelist, | |
891 | (dma->page_count + (count << page_order)) | |
892 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 893 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 894 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
895 | return -ENOMEM; |
896 | } | |
897 | dma->buflist = temp_buflist; | |
898 | ||
b5e89ed5 | 899 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
900 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
901 | } | |
902 | ||
903 | /* No allocations failed, so now we can replace the orginal pagelist | |
904 | * with the new one. | |
905 | */ | |
906 | if (dma->page_count) { | |
907 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
908 | dma->page_count * sizeof(*dma->pagelist), |
909 | DRM_MEM_PAGES); | |
1da177e4 LT |
910 | } |
911 | dma->pagelist = temp_pagelist; | |
912 | ||
913 | dma->buf_count += entry->buf_count; | |
914 | dma->seg_count += entry->seg_count; | |
915 | dma->page_count += entry->seg_count << page_order; | |
916 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
917 | ||
30e2fb18 | 918 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 919 | |
d59431bf DA |
920 | request->count = entry->buf_count; |
921 | request->size = size; | |
1da177e4 | 922 | |
3417f33e GS |
923 | if (request->flags & _DRM_PCI_BUFFER_RO) |
924 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
925 | ||
b5e89ed5 | 926 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
927 | return 0; |
928 | ||
929 | } | |
d84f76d3 | 930 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 931 | |
84b1fd10 | 932 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 933 | { |
cdd55a29 DA |
934 | struct drm_device_dma *dma = dev->dma; |
935 | struct drm_buf_entry *entry; | |
056219e2 | 936 | struct drm_buf *buf; |
1da177e4 LT |
937 | unsigned long offset; |
938 | unsigned long agp_offset; | |
939 | int count; | |
940 | int order; | |
941 | int size; | |
942 | int alignment; | |
943 | int page_order; | |
944 | int total; | |
945 | int byte_count; | |
946 | int i; | |
056219e2 | 947 | struct drm_buf **temp_buflist; |
1da177e4 | 948 | |
b5e89ed5 DA |
949 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
950 | return -EINVAL; | |
951 | ||
952 | if (!dma) | |
953 | return -EINVAL; | |
1da177e4 | 954 | |
d985c108 DA |
955 | if (!capable(CAP_SYS_ADMIN)) |
956 | return -EPERM; | |
957 | ||
d59431bf DA |
958 | count = request->count; |
959 | order = drm_order(request->size); | |
1da177e4 LT |
960 | size = 1 << order; |
961 | ||
b5e89ed5 DA |
962 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
963 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
964 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
965 | total = PAGE_SIZE << page_order; | |
966 | ||
967 | byte_count = 0; | |
d59431bf | 968 | agp_offset = request->agp_start; |
1da177e4 | 969 | |
b5e89ed5 DA |
970 | DRM_DEBUG("count: %d\n", count); |
971 | DRM_DEBUG("order: %d\n", order); | |
972 | DRM_DEBUG("size: %d\n", size); | |
973 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
974 | DRM_DEBUG("alignment: %d\n", alignment); | |
975 | DRM_DEBUG("page_order: %d\n", page_order); | |
976 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 977 | |
b5e89ed5 DA |
978 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
979 | return -EINVAL; | |
980 | if (dev->queue_count) | |
981 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 982 | |
b5e89ed5 DA |
983 | spin_lock(&dev->count_lock); |
984 | if (dev->buf_use) { | |
985 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
986 | return -EBUSY; |
987 | } | |
b5e89ed5 DA |
988 | atomic_inc(&dev->buf_alloc); |
989 | spin_unlock(&dev->count_lock); | |
1da177e4 | 990 | |
30e2fb18 | 991 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 992 | entry = &dma->bufs[order]; |
b5e89ed5 | 993 | if (entry->buf_count) { |
30e2fb18 | 994 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
995 | atomic_dec(&dev->buf_alloc); |
996 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
997 | } |
998 | ||
999 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1000 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1001 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1002 | return -EINVAL; |
1003 | } | |
1004 | ||
b5e89ed5 DA |
1005 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
1006 | DRM_MEM_BUFS); | |
1007 | if (!entry->buflist) { | |
30e2fb18 | 1008 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1009 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1010 | return -ENOMEM; |
1011 | } | |
b5e89ed5 | 1012 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
1013 | |
1014 | entry->buf_size = size; | |
1015 | entry->page_order = page_order; | |
1016 | ||
1017 | offset = 0; | |
1018 | ||
b5e89ed5 DA |
1019 | while (entry->buf_count < count) { |
1020 | buf = &entry->buflist[entry->buf_count]; | |
1021 | buf->idx = dma->buf_count + entry->buf_count; | |
1022 | buf->total = alignment; | |
1023 | buf->order = order; | |
1024 | buf->used = 0; | |
1da177e4 | 1025 | |
b5e89ed5 | 1026 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1027 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1028 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1029 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1030 | buf->next = NULL; |
1da177e4 LT |
1031 | buf->waiting = 0; |
1032 | buf->pending = 0; | |
b5e89ed5 | 1033 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 1034 | buf->file_priv = NULL; |
1da177e4 LT |
1035 | |
1036 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
1037 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
1038 | if (!buf->dev_private) { | |
1da177e4 LT |
1039 | /* Set count correctly so we free the proper amount. */ |
1040 | entry->buf_count = count; | |
b5e89ed5 | 1041 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1042 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1043 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1044 | return -ENOMEM; |
1045 | } | |
1046 | ||
b5e89ed5 | 1047 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1048 | |
b5e89ed5 | 1049 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1050 | |
1051 | offset += alignment; | |
1052 | entry->buf_count++; | |
1053 | byte_count += PAGE_SIZE << page_order; | |
1054 | } | |
1055 | ||
b5e89ed5 | 1056 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1057 | |
b5e89ed5 DA |
1058 | temp_buflist = drm_realloc(dma->buflist, |
1059 | dma->buf_count * sizeof(*dma->buflist), | |
1060 | (dma->buf_count + entry->buf_count) | |
1061 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1062 | if (!temp_buflist) { | |
1da177e4 | 1063 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1064 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1065 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1066 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1067 | return -ENOMEM; |
1068 | } | |
1069 | dma->buflist = temp_buflist; | |
1070 | ||
b5e89ed5 | 1071 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1072 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1073 | } | |
1074 | ||
1075 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1076 | dma->seg_count += entry->seg_count; |
1077 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1078 | dma->byte_count += byte_count; |
1079 | ||
b5e89ed5 DA |
1080 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1081 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1082 | |
30e2fb18 | 1083 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1084 | |
d59431bf DA |
1085 | request->count = entry->buf_count; |
1086 | request->size = size; | |
1da177e4 LT |
1087 | |
1088 | dma->flags = _DRM_DMA_USE_SG; | |
1089 | ||
b5e89ed5 | 1090 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1091 | return 0; |
1092 | } | |
1093 | ||
84b1fd10 | 1094 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1095 | { |
cdd55a29 DA |
1096 | struct drm_device_dma *dma = dev->dma; |
1097 | struct drm_buf_entry *entry; | |
056219e2 | 1098 | struct drm_buf *buf; |
b84397d6 DA |
1099 | unsigned long offset; |
1100 | unsigned long agp_offset; | |
1101 | int count; | |
1102 | int order; | |
1103 | int size; | |
1104 | int alignment; | |
1105 | int page_order; | |
1106 | int total; | |
1107 | int byte_count; | |
1108 | int i; | |
056219e2 | 1109 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1110 | |
1111 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1112 | return -EINVAL; | |
b5e89ed5 | 1113 | |
b84397d6 DA |
1114 | if (!dma) |
1115 | return -EINVAL; | |
1116 | ||
d985c108 DA |
1117 | if (!capable(CAP_SYS_ADMIN)) |
1118 | return -EPERM; | |
1119 | ||
d59431bf DA |
1120 | count = request->count; |
1121 | order = drm_order(request->size); | |
b84397d6 DA |
1122 | size = 1 << order; |
1123 | ||
d59431bf | 1124 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1125 | ? PAGE_ALIGN(size) : size; |
1126 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1127 | total = PAGE_SIZE << page_order; | |
1128 | ||
1129 | byte_count = 0; | |
d59431bf | 1130 | agp_offset = request->agp_start; |
b84397d6 DA |
1131 | |
1132 | DRM_DEBUG("count: %d\n", count); | |
1133 | DRM_DEBUG("order: %d\n", order); | |
1134 | DRM_DEBUG("size: %d\n", size); | |
1135 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1136 | DRM_DEBUG("alignment: %d\n", alignment); | |
1137 | DRM_DEBUG("page_order: %d\n", page_order); | |
1138 | DRM_DEBUG("total: %d\n", total); | |
1139 | ||
1140 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1141 | return -EINVAL; | |
1142 | if (dev->queue_count) | |
1143 | return -EBUSY; /* Not while in use */ | |
1144 | ||
1145 | spin_lock(&dev->count_lock); | |
1146 | if (dev->buf_use) { | |
1147 | spin_unlock(&dev->count_lock); | |
1148 | return -EBUSY; | |
1149 | } | |
1150 | atomic_inc(&dev->buf_alloc); | |
1151 | spin_unlock(&dev->count_lock); | |
1152 | ||
30e2fb18 | 1153 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1154 | entry = &dma->bufs[order]; |
1155 | if (entry->buf_count) { | |
30e2fb18 | 1156 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1157 | atomic_dec(&dev->buf_alloc); |
1158 | return -ENOMEM; /* May only call once for each order */ | |
1159 | } | |
1160 | ||
1161 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1162 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1163 | atomic_dec(&dev->buf_alloc); |
1164 | return -EINVAL; | |
1165 | } | |
1166 | ||
1167 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), | |
1168 | DRM_MEM_BUFS); | |
1169 | if (!entry->buflist) { | |
30e2fb18 | 1170 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1171 | atomic_dec(&dev->buf_alloc); |
1172 | return -ENOMEM; | |
1173 | } | |
1174 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1175 | ||
1176 | entry->buf_size = size; | |
1177 | entry->page_order = page_order; | |
1178 | ||
1179 | offset = 0; | |
1180 | ||
1181 | while (entry->buf_count < count) { | |
1182 | buf = &entry->buflist[entry->buf_count]; | |
1183 | buf->idx = dma->buf_count + entry->buf_count; | |
1184 | buf->total = alignment; | |
1185 | buf->order = order; | |
1186 | buf->used = 0; | |
1187 | ||
1188 | buf->offset = (dma->byte_count + offset); | |
1189 | buf->bus_address = agp_offset + offset; | |
1190 | buf->address = (void *)(agp_offset + offset); | |
1191 | buf->next = NULL; | |
1192 | buf->waiting = 0; | |
1193 | buf->pending = 0; | |
1194 | init_waitqueue_head(&buf->dma_wait); | |
6c340eac | 1195 | buf->file_priv = NULL; |
b84397d6 DA |
1196 | |
1197 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
1198 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); | |
1199 | if (!buf->dev_private) { | |
1200 | /* Set count correctly so we free the proper amount. */ | |
1201 | entry->buf_count = count; | |
1202 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1203 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1204 | atomic_dec(&dev->buf_alloc); |
1205 | return -ENOMEM; | |
1206 | } | |
1207 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1208 | ||
1209 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1210 | ||
1211 | offset += alignment; | |
1212 | entry->buf_count++; | |
1213 | byte_count += PAGE_SIZE << page_order; | |
1214 | } | |
1215 | ||
1216 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1217 | ||
1218 | temp_buflist = drm_realloc(dma->buflist, | |
1219 | dma->buf_count * sizeof(*dma->buflist), | |
1220 | (dma->buf_count + entry->buf_count) | |
1221 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1222 | if (!temp_buflist) { | |
1223 | /* Free the entry because it isn't valid */ | |
1224 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1225 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1226 | atomic_dec(&dev->buf_alloc); |
1227 | return -ENOMEM; | |
1228 | } | |
1229 | dma->buflist = temp_buflist; | |
1230 | ||
1231 | for (i = 0; i < entry->buf_count; i++) { | |
1232 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1233 | } | |
1234 | ||
1235 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1236 | dma->seg_count += entry->seg_count; |
1237 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1238 | dma->byte_count += byte_count; |
1239 | ||
1240 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1241 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1242 | ||
30e2fb18 | 1243 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1244 | |
d59431bf DA |
1245 | request->count = entry->buf_count; |
1246 | request->size = size; | |
b84397d6 DA |
1247 | |
1248 | dma->flags = _DRM_DMA_USE_FB; | |
1249 | ||
1250 | atomic_dec(&dev->buf_alloc); | |
1251 | return 0; | |
1252 | } | |
d985c108 | 1253 | |
b84397d6 | 1254 | |
1da177e4 LT |
1255 | /** |
1256 | * Add buffers for DMA transfers (ioctl). | |
1257 | * | |
1258 | * \param inode device inode. | |
6c340eac | 1259 | * \param file_priv DRM file private. |
1da177e4 | 1260 | * \param cmd command. |
c60ce623 | 1261 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1262 | * \return zero on success or a negative number on failure. |
1263 | * | |
1264 | * According with the memory type specified in drm_buf_desc::flags and the | |
1265 | * build options, it dispatches the call either to addbufs_agp(), | |
1266 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1267 | * PCI memory respectively. | |
1268 | */ | |
c153f45f EA |
1269 | int drm_addbufs(struct drm_device *dev, void *data, |
1270 | struct drm_file *file_priv) | |
1da177e4 | 1271 | { |
c153f45f | 1272 | struct drm_buf_desc *request = data; |
d59431bf | 1273 | int ret; |
b5e89ed5 | 1274 | |
1da177e4 LT |
1275 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1276 | return -EINVAL; | |
1277 | ||
1da177e4 | 1278 | #if __OS_HAS_AGP |
c153f45f EA |
1279 | if (request->flags & _DRM_AGP_BUFFER) |
1280 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1281 | else |
1282 | #endif | |
c153f45f EA |
1283 | if (request->flags & _DRM_SG_BUFFER) |
1284 | ret = drm_addbufs_sg(dev, request); | |
1285 | else if (request->flags & _DRM_FB_BUFFER) | |
1286 | ret = drm_addbufs_fb(dev, request); | |
1da177e4 | 1287 | else |
c153f45f | 1288 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1289 | |
d59431bf | 1290 | return ret; |
1da177e4 LT |
1291 | } |
1292 | ||
1da177e4 LT |
1293 | /** |
1294 | * Get information about the buffer mappings. | |
1295 | * | |
1296 | * This was originally mean for debugging purposes, or by a sophisticated | |
1297 | * client library to determine how best to use the available buffers (e.g., | |
1298 | * large buffers can be used for image transfer). | |
1299 | * | |
1300 | * \param inode device inode. | |
6c340eac | 1301 | * \param file_priv DRM file private. |
1da177e4 LT |
1302 | * \param cmd command. |
1303 | * \param arg pointer to a drm_buf_info structure. | |
1304 | * \return zero on success or a negative number on failure. | |
1305 | * | |
1306 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1307 | * lock, preventing of allocating more buffers after this call. Information | |
1308 | * about each requested buffer is then copied into user space. | |
1309 | */ | |
c153f45f EA |
1310 | int drm_infobufs(struct drm_device *dev, void *data, |
1311 | struct drm_file *file_priv) | |
1da177e4 | 1312 | { |
cdd55a29 | 1313 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1314 | struct drm_buf_info *request = data; |
1da177e4 LT |
1315 | int i; |
1316 | int count; | |
1317 | ||
1318 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1319 | return -EINVAL; | |
1320 | ||
b5e89ed5 DA |
1321 | if (!dma) |
1322 | return -EINVAL; | |
1da177e4 | 1323 | |
b5e89ed5 DA |
1324 | spin_lock(&dev->count_lock); |
1325 | if (atomic_read(&dev->buf_alloc)) { | |
1326 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1327 | return -EBUSY; |
1328 | } | |
1329 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1330 | spin_unlock(&dev->count_lock); |
1da177e4 | 1331 | |
b5e89ed5 DA |
1332 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1333 | if (dma->bufs[i].buf_count) | |
1334 | ++count; | |
1da177e4 LT |
1335 | } |
1336 | ||
b5e89ed5 | 1337 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1338 | |
c153f45f | 1339 | if (request->count >= count) { |
b5e89ed5 DA |
1340 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1341 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1342 | struct drm_buf_desc __user *to = |
c153f45f | 1343 | &request->list[count]; |
cdd55a29 DA |
1344 | struct drm_buf_entry *from = &dma->bufs[i]; |
1345 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1346 | if (copy_to_user(&to->count, |
1347 | &from->buf_count, | |
1348 | sizeof(from->buf_count)) || | |
1349 | copy_to_user(&to->size, | |
1350 | &from->buf_size, | |
1351 | sizeof(from->buf_size)) || | |
1352 | copy_to_user(&to->low_mark, | |
1353 | &list->low_mark, | |
1354 | sizeof(list->low_mark)) || | |
1355 | copy_to_user(&to->high_mark, | |
1356 | &list->high_mark, | |
1357 | sizeof(list->high_mark))) | |
1da177e4 LT |
1358 | return -EFAULT; |
1359 | ||
b5e89ed5 DA |
1360 | DRM_DEBUG("%d %d %d %d %d\n", |
1361 | i, | |
1362 | dma->bufs[i].buf_count, | |
1363 | dma->bufs[i].buf_size, | |
1364 | dma->bufs[i].freelist.low_mark, | |
1365 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1366 | ++count; |
1367 | } | |
1368 | } | |
1369 | } | |
c153f45f | 1370 | request->count = count; |
1da177e4 LT |
1371 | |
1372 | return 0; | |
1373 | } | |
1374 | ||
1375 | /** | |
1376 | * Specifies a low and high water mark for buffer allocation | |
1377 | * | |
1378 | * \param inode device inode. | |
6c340eac | 1379 | * \param file_priv DRM file private. |
1da177e4 LT |
1380 | * \param cmd command. |
1381 | * \param arg a pointer to a drm_buf_desc structure. | |
1382 | * \return zero on success or a negative number on failure. | |
1383 | * | |
1384 | * Verifies that the size order is bounded between the admissible orders and | |
1385 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1386 | * | |
1387 | * \note This ioctl is deprecated and mostly never used. | |
1388 | */ | |
c153f45f EA |
1389 | int drm_markbufs(struct drm_device *dev, void *data, |
1390 | struct drm_file *file_priv) | |
1da177e4 | 1391 | { |
cdd55a29 | 1392 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1393 | struct drm_buf_desc *request = data; |
1da177e4 | 1394 | int order; |
cdd55a29 | 1395 | struct drm_buf_entry *entry; |
1da177e4 LT |
1396 | |
1397 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1398 | return -EINVAL; | |
1399 | ||
b5e89ed5 DA |
1400 | if (!dma) |
1401 | return -EINVAL; | |
1da177e4 | 1402 | |
b5e89ed5 | 1403 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f EA |
1404 | request->size, request->low_mark, request->high_mark); |
1405 | order = drm_order(request->size); | |
b5e89ed5 DA |
1406 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1407 | return -EINVAL; | |
1da177e4 LT |
1408 | entry = &dma->bufs[order]; |
1409 | ||
c153f45f | 1410 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1411 | return -EINVAL; |
c153f45f | 1412 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1413 | return -EINVAL; |
1414 | ||
c153f45f EA |
1415 | entry->freelist.low_mark = request->low_mark; |
1416 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1417 | |
1418 | return 0; | |
1419 | } | |
1420 | ||
1421 | /** | |
b5e89ed5 | 1422 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1423 | * |
1424 | * \param inode device inode. | |
6c340eac | 1425 | * \param file_priv DRM file private. |
1da177e4 LT |
1426 | * \param cmd command. |
1427 | * \param arg pointer to a drm_buf_free structure. | |
1428 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1429 | * |
1da177e4 LT |
1430 | * Calls free_buffer() for each used buffer. |
1431 | * This function is primarily used for debugging. | |
1432 | */ | |
c153f45f EA |
1433 | int drm_freebufs(struct drm_device *dev, void *data, |
1434 | struct drm_file *file_priv) | |
1da177e4 | 1435 | { |
cdd55a29 | 1436 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1437 | struct drm_buf_free *request = data; |
1da177e4 LT |
1438 | int i; |
1439 | int idx; | |
056219e2 | 1440 | struct drm_buf *buf; |
1da177e4 LT |
1441 | |
1442 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1443 | return -EINVAL; | |
1444 | ||
b5e89ed5 DA |
1445 | if (!dma) |
1446 | return -EINVAL; | |
1da177e4 | 1447 | |
c153f45f EA |
1448 | DRM_DEBUG("%d\n", request->count); |
1449 | for (i = 0; i < request->count; i++) { | |
1450 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1451 | return -EFAULT; |
b5e89ed5 DA |
1452 | if (idx < 0 || idx >= dma->buf_count) { |
1453 | DRM_ERROR("Index %d (of %d max)\n", | |
1454 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1455 | return -EINVAL; |
1456 | } | |
1457 | buf = dma->buflist[idx]; | |
6c340eac | 1458 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1459 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1460 | task_pid_nr(current)); |
1da177e4 LT |
1461 | return -EINVAL; |
1462 | } | |
b5e89ed5 | 1463 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1464 | } |
1465 | ||
1466 | return 0; | |
1467 | } | |
1468 | ||
1469 | /** | |
1470 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1471 | * | |
1472 | * \param inode device inode. | |
6c340eac | 1473 | * \param file_priv DRM file private. |
1da177e4 LT |
1474 | * \param cmd command. |
1475 | * \param arg pointer to a drm_buf_map structure. | |
1476 | * \return zero on success or a negative number on failure. | |
1477 | * | |
3417f33e GS |
1478 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1479 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1480 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1481 | * drm_mmap_dma(). | |
1da177e4 | 1482 | */ |
c153f45f EA |
1483 | int drm_mapbufs(struct drm_device *dev, void *data, |
1484 | struct drm_file *file_priv) | |
1da177e4 | 1485 | { |
cdd55a29 | 1486 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1487 | int retcode = 0; |
1488 | const int zero = 0; | |
1489 | unsigned long virtual; | |
1490 | unsigned long address; | |
c153f45f | 1491 | struct drm_buf_map *request = data; |
1da177e4 LT |
1492 | int i; |
1493 | ||
1494 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1495 | return -EINVAL; | |
1496 | ||
b5e89ed5 DA |
1497 | if (!dma) |
1498 | return -EINVAL; | |
1da177e4 | 1499 | |
b5e89ed5 DA |
1500 | spin_lock(&dev->count_lock); |
1501 | if (atomic_read(&dev->buf_alloc)) { | |
1502 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1503 | return -EBUSY; |
1504 | } | |
1505 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1506 | spin_unlock(&dev->count_lock); |
1da177e4 | 1507 | |
c153f45f | 1508 | if (request->count >= dma->buf_count) { |
b84397d6 | 1509 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1510 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1511 | && (dma->flags & _DRM_DMA_USE_SG)) |
1512 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1513 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
c60ce623 | 1514 | struct drm_map *map = dev->agp_buffer_map; |
d1f2b55a | 1515 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1516 | |
b5e89ed5 | 1517 | if (!map) { |
1da177e4 LT |
1518 | retcode = -EINVAL; |
1519 | goto done; | |
1520 | } | |
b5e89ed5 | 1521 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1522 | virtual = do_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1523 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1524 | MAP_SHARED, |
1525 | token); | |
b5e89ed5 | 1526 | up_write(¤t->mm->mmap_sem); |
1da177e4 | 1527 | } else { |
b5e89ed5 | 1528 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1529 | virtual = do_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1530 | PROT_READ | PROT_WRITE, |
1531 | MAP_SHARED, 0); | |
1532 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1533 | } |
b5e89ed5 | 1534 | if (virtual > -1024UL) { |
1da177e4 LT |
1535 | /* Real error */ |
1536 | retcode = (signed long)virtual; | |
1537 | goto done; | |
1538 | } | |
c153f45f | 1539 | request->virtual = (void __user *)virtual; |
1da177e4 | 1540 | |
b5e89ed5 | 1541 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1542 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1543 | &dma->buflist[i]->idx, |
c153f45f | 1544 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1545 | retcode = -EFAULT; |
1546 | goto done; | |
1547 | } | |
c153f45f | 1548 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1549 | &dma->buflist[i]->total, |
c153f45f | 1550 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1551 | retcode = -EFAULT; |
1552 | goto done; | |
1553 | } | |
c153f45f | 1554 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1555 | &zero, sizeof(zero))) { |
1da177e4 LT |
1556 | retcode = -EFAULT; |
1557 | goto done; | |
1558 | } | |
b5e89ed5 | 1559 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1560 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1561 | &address, sizeof(address))) { |
1da177e4 LT |
1562 | retcode = -EFAULT; |
1563 | goto done; | |
1564 | } | |
1565 | } | |
1566 | } | |
b5e89ed5 | 1567 | done: |
c153f45f EA |
1568 | request->count = dma->buf_count; |
1569 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1570 | |
1571 | return retcode; | |
1572 | } | |
1573 | ||
836cf046 DA |
1574 | /** |
1575 | * Compute size order. Returns the exponent of the smaller power of two which | |
1576 | * is greater or equal to given number. | |
b5e89ed5 | 1577 | * |
836cf046 DA |
1578 | * \param size size. |
1579 | * \return order. | |
1580 | * | |
1581 | * \todo Can be made faster. | |
1582 | */ | |
b5e89ed5 | 1583 | int drm_order(unsigned long size) |
836cf046 DA |
1584 | { |
1585 | int order; | |
1586 | unsigned long tmp; | |
1587 | ||
b5e89ed5 | 1588 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1589 | |
1590 | if (size & (size - 1)) | |
1591 | ++order; | |
1592 | ||
1593 | return order; | |
1594 | } | |
1595 | EXPORT_SYMBOL(drm_order); |