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 | ||
d883f7f1 | 39 | resource_size_t 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 | |
d883f7f1 | 45 | resource_size_t 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, |
f77d390c | 53 | struct drm_local_map *map) |
836cf046 | 54 | { |
55910517 | 55 | struct drm_map_list *entry; |
bd1b331f | 56 | list_for_each_entry(entry, &dev->maplist, head) { |
7c1c2871 | 57 | if (entry->map && (entry->master == dev->primary->master) && (map->type == entry->map->type) && |
54ba2f76 | 58 | ((entry->map->offset == map->offset) || |
7c1c2871 | 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 | 91 | /** |
f77d390c BH |
92 | * Core function to create a range of memory available for mapping by a |
93 | * non-root process. | |
1da177e4 LT |
94 | * |
95 | * Adjusts the memory offset to its absolute value according to the mapping | |
96 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
97 | * applicable and if supported by the kernel. | |
98 | */ | |
84b1fd10 | 99 | static int drm_addmap_core(struct drm_device * dev, unsigned int offset, |
c60ce623 | 100 | unsigned int size, enum drm_map_type type, |
55910517 DA |
101 | enum drm_map_flags flags, |
102 | struct drm_map_list ** maplist) | |
1da177e4 | 103 | { |
f77d390c | 104 | struct drm_local_map *map; |
55910517 | 105 | struct drm_map_list *list; |
9c8da5eb | 106 | drm_dma_handle_t *dmah; |
8d153f71 TH |
107 | unsigned long user_token; |
108 | int ret; | |
1da177e4 | 109 | |
b5e89ed5 DA |
110 | map = drm_alloc(sizeof(*map), DRM_MEM_MAPS); |
111 | if (!map) | |
1da177e4 LT |
112 | return -ENOMEM; |
113 | ||
7ab98401 DA |
114 | map->offset = offset; |
115 | map->size = size; | |
116 | map->flags = flags; | |
117 | map->type = type; | |
1da177e4 LT |
118 | |
119 | /* Only allow shared memory to be removable since we only keep enough | |
120 | * book keeping information about shared memory to allow for removal | |
121 | * when processes fork. | |
122 | */ | |
b5e89ed5 DA |
123 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
124 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
125 | return -EINVAL; |
126 | } | |
b5e89ed5 DA |
127 | DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n", |
128 | map->offset, map->size, map->type); | |
129 | if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) { | |
130 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
131 | return -EINVAL; |
132 | } | |
b5e89ed5 | 133 | map->mtrr = -1; |
1da177e4 LT |
134 | map->handle = NULL; |
135 | ||
b5e89ed5 | 136 | switch (map->type) { |
1da177e4 LT |
137 | case _DRM_REGISTERS: |
138 | case _DRM_FRAME_BUFFER: | |
88f399cd | 139 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) |
8d2ea625 | 140 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 DA |
141 | map->offset < virt_to_phys(high_memory)) { |
142 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
143 | return -EINVAL; |
144 | } | |
145 | #endif | |
146 | #ifdef __alpha__ | |
147 | map->offset += dev->hose->mem_space->start; | |
148 | #endif | |
836cf046 DA |
149 | /* Some drivers preinitialize some maps, without the X Server |
150 | * needing to be aware of it. Therefore, we just return success | |
151 | * when the server tries to create a duplicate map. | |
152 | */ | |
89625eb1 DA |
153 | list = drm_find_matching_map(dev, map); |
154 | if (list != NULL) { | |
155 | if (list->map->size != map->size) { | |
836cf046 | 156 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
157 | "mismatched sizes, (%ld vs %ld)\n", |
158 | map->type, map->size, | |
159 | list->map->size); | |
89625eb1 | 160 | list->map->size = map->size; |
836cf046 DA |
161 | } |
162 | ||
163 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
89625eb1 | 164 | *maplist = list; |
836cf046 DA |
165 | return 0; |
166 | } | |
167 | ||
1da177e4 | 168 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
169 | if (map->type == _DRM_FRAME_BUFFER || |
170 | (map->flags & _DRM_WRITE_COMBINING)) { | |
171 | map->mtrr = mtrr_add(map->offset, map->size, | |
172 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
173 | } |
174 | } | |
0769d39c | 175 | if (map->type == _DRM_REGISTERS) { |
004a7727 | 176 | map->handle = ioremap(map->offset, map->size); |
0769d39c ST |
177 | if (!map->handle) { |
178 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
179 | return -ENOMEM; | |
180 | } | |
181 | } | |
bc5f4523 | 182 | |
1da177e4 | 183 | break; |
1da177e4 | 184 | case _DRM_SHM: |
54ba2f76 DA |
185 | list = drm_find_matching_map(dev, map); |
186 | if (list != NULL) { | |
187 | if(list->map->size != map->size) { | |
188 | DRM_DEBUG("Matching maps of type %d with " | |
189 | "mismatched sizes, (%ld vs %ld)\n", | |
190 | map->type, map->size, list->map->size); | |
191 | list->map->size = map->size; | |
192 | } | |
193 | ||
194 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
195 | *maplist = list; | |
196 | return 0; | |
197 | } | |
f239b7b0 | 198 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
199 | DRM_DEBUG("%lu %d %p\n", |
200 | map->size, drm_order(map->size), map->handle); | |
201 | if (!map->handle) { | |
202 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
203 | return -ENOMEM; |
204 | } | |
205 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 206 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 207 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
7c1c2871 | 208 | if (dev->primary->master->lock.hw_lock != NULL) { |
b5e89ed5 DA |
209 | vfree(map->handle); |
210 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
211 | return -EBUSY; |
212 | } | |
7c1c2871 | 213 | dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
214 | } |
215 | break; | |
54ba2f76 | 216 | case _DRM_AGP: { |
55910517 | 217 | struct drm_agp_mem *entry; |
54ba2f76 DA |
218 | int valid = 0; |
219 | ||
220 | if (!drm_core_has_AGP(dev)) { | |
221 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
222 | return -EINVAL; | |
223 | } | |
1da177e4 | 224 | #ifdef __alpha__ |
54ba2f76 | 225 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 226 | #endif |
47a184a8 EA |
227 | /* In some cases (i810 driver), user space may have already |
228 | * added the AGP base itself, because dev->agp->base previously | |
229 | * only got set during AGP enable. So, only add the base | |
230 | * address if the map's offset isn't already within the | |
231 | * aperture. | |
54ba2f76 | 232 | */ |
47a184a8 EA |
233 | if (map->offset < dev->agp->base || |
234 | map->offset > dev->agp->base + | |
235 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
236 | map->offset += dev->agp->base; | |
237 | } | |
54ba2f76 DA |
238 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
239 | ||
240 | /* This assumes the DRM is in total control of AGP space. | |
241 | * It's not always the case as AGP can be in the control | |
242 | * of user space (i.e. i810 driver). So this loop will get | |
243 | * skipped and we double check that dev->agp->memory is | |
244 | * actually set as well as being invalid before EPERM'ing | |
245 | */ | |
bd1b331f | 246 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
247 | if ((map->offset >= entry->bound) && |
248 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
249 | valid = 1; | |
250 | break; | |
251 | } | |
1da177e4 | 252 | } |
bd1b331f | 253 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
254 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
255 | return -EPERM; | |
256 | } | |
257 | DRM_DEBUG("AGP offset = 0x%08lx, size = 0x%08lx\n", map->offset, map->size); | |
258 | ||
a2c0a97b JB |
259 | break; |
260 | case _DRM_GEM: | |
261 | DRM_ERROR("tried to rmmap GEM object\n"); | |
1da177e4 | 262 | break; |
54ba2f76 | 263 | } |
1da177e4 LT |
264 | case _DRM_SCATTER_GATHER: |
265 | if (!dev->sg) { | |
266 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
267 | return -EINVAL; | |
268 | } | |
d1f2b55a | 269 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 270 | break; |
b5e89ed5 | 271 | case _DRM_CONSISTENT: |
2d0f9eaf | 272 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 273 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
274 | * casting it down to 32 bits is no problem, but we |
275 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
276 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
277 | if (!dmah) { | |
2d0f9eaf DA |
278 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
279 | return -ENOMEM; | |
280 | } | |
9c8da5eb DA |
281 | map->handle = dmah->vaddr; |
282 | map->offset = (unsigned long)dmah->busaddr; | |
283 | kfree(dmah); | |
2d0f9eaf | 284 | break; |
1da177e4 | 285 | default: |
b5e89ed5 | 286 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
287 | return -EINVAL; |
288 | } | |
289 | ||
290 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); | |
b5e89ed5 | 291 | if (!list) { |
85abb3f9 | 292 | if (map->type == _DRM_REGISTERS) |
004a7727 | 293 | iounmap(map->handle); |
1da177e4 LT |
294 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
295 | return -EINVAL; | |
296 | } | |
297 | memset(list, 0, sizeof(*list)); | |
298 | list->map = map; | |
299 | ||
30e2fb18 | 300 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 301 | list_add(&list->head, &dev->maplist); |
8d153f71 | 302 | |
d1f2b55a | 303 | /* Assign a 32-bit handle */ |
30e2fb18 | 304 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
305 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
306 | map->offset; | |
a1d0fcf5 | 307 | ret = drm_map_handle(dev, &list->hash, user_token, 0); |
8d153f71 | 308 | if (ret) { |
85abb3f9 | 309 | if (map->type == _DRM_REGISTERS) |
004a7727 | 310 | iounmap(map->handle); |
8d153f71 TH |
311 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
312 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); | |
313 | mutex_unlock(&dev->struct_mutex); | |
314 | return ret; | |
315 | } | |
316 | ||
1545085a | 317 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 318 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 319 | |
7c1c2871 | 320 | list->master = dev->primary->master; |
89625eb1 | 321 | *maplist = list; |
7ab98401 | 322 | return 0; |
54ba2f76 | 323 | } |
89625eb1 | 324 | |
84b1fd10 | 325 | int drm_addmap(struct drm_device * dev, unsigned int offset, |
c60ce623 | 326 | unsigned int size, enum drm_map_type type, |
f77d390c | 327 | enum drm_map_flags flags, struct drm_local_map ** map_ptr) |
89625eb1 | 328 | { |
55910517 | 329 | struct drm_map_list *list; |
89625eb1 DA |
330 | int rc; |
331 | ||
332 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
333 | if (!rc) | |
334 | *map_ptr = list->map; | |
335 | return rc; | |
336 | } | |
b5e89ed5 | 337 | |
7ab98401 DA |
338 | EXPORT_SYMBOL(drm_addmap); |
339 | ||
f77d390c BH |
340 | /** |
341 | * Ioctl to specify a range of memory that is available for mapping by a | |
342 | * non-root process. | |
343 | * | |
344 | * \param inode device inode. | |
345 | * \param file_priv DRM file private. | |
346 | * \param cmd command. | |
347 | * \param arg pointer to a drm_map structure. | |
348 | * \return zero on success or a negative value on error. | |
349 | * | |
350 | */ | |
c153f45f EA |
351 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
352 | struct drm_file *file_priv) | |
7ab98401 | 353 | { |
c153f45f | 354 | struct drm_map *map = data; |
55910517 | 355 | struct drm_map_list *maplist; |
7ab98401 DA |
356 | int err; |
357 | ||
7c1c2871 | 358 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
359 | return -EPERM; |
360 | ||
c153f45f EA |
361 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
362 | map->flags, &maplist); | |
7ab98401 | 363 | |
b5e89ed5 | 364 | if (err) |
7ab98401 | 365 | return err; |
d1f2b55a | 366 | |
67e1a014 | 367 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 368 | map->handle = (void *)(unsigned long)maplist->user_token; |
1da177e4 | 369 | return 0; |
88f399cd | 370 | } |
1da177e4 | 371 | |
1da177e4 LT |
372 | /** |
373 | * Remove a map private from list and deallocate resources if the mapping | |
374 | * isn't in use. | |
375 | * | |
1da177e4 LT |
376 | * Searches the map on drm_device::maplist, removes it from the list, see if |
377 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
378 | * being on use. | |
379 | * | |
7ab98401 | 380 | * \sa drm_addmap |
1da177e4 | 381 | */ |
f77d390c | 382 | int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 383 | { |
55910517 | 384 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 385 | drm_dma_handle_t dmah; |
bd1b331f | 386 | int found = 0; |
7c1c2871 | 387 | struct drm_master *master; |
1da177e4 | 388 | |
836cf046 | 389 | /* Find the list entry for the map and remove it */ |
bd1b331f | 390 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 391 | if (r_list->map == map) { |
7c1c2871 | 392 | master = r_list->master; |
bd1b331f | 393 | list_del(&r_list->head); |
1545085a TH |
394 | drm_ht_remove_key(&dev->map_hash, |
395 | r_list->user_token >> PAGE_SHIFT); | |
bd1b331f DA |
396 | drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS); |
397 | found = 1; | |
836cf046 DA |
398 | break; |
399 | } | |
1da177e4 LT |
400 | } |
401 | ||
bd1b331f | 402 | if (!found) |
1da177e4 | 403 | return -EINVAL; |
1da177e4 | 404 | |
836cf046 DA |
405 | switch (map->type) { |
406 | case _DRM_REGISTERS: | |
004a7727 | 407 | iounmap(map->handle); |
836cf046 DA |
408 | /* FALLTHROUGH */ |
409 | case _DRM_FRAME_BUFFER: | |
410 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
411 | int retcode; | |
b5e89ed5 DA |
412 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
413 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 414 | } |
836cf046 DA |
415 | break; |
416 | case _DRM_SHM: | |
417 | vfree(map->handle); | |
7c1c2871 DA |
418 | if (master) { |
419 | if (dev->sigdata.lock == master->lock.hw_lock) | |
420 | dev->sigdata.lock = NULL; | |
421 | master->lock.hw_lock = NULL; /* SHM removed */ | |
422 | master->lock.file_priv = NULL; | |
171901d1 | 423 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 424 | } |
836cf046 DA |
425 | break; |
426 | case _DRM_AGP: | |
427 | case _DRM_SCATTER_GATHER: | |
428 | break; | |
429 | case _DRM_CONSISTENT: | |
430 | dmah.vaddr = map->handle; | |
431 | dmah.busaddr = map->offset; | |
432 | dmah.size = map->size; | |
433 | __drm_pci_free(dev, &dmah); | |
434 | break; | |
a2c0a97b JB |
435 | case _DRM_GEM: |
436 | DRM_ERROR("tried to rmmap GEM object\n"); | |
437 | break; | |
1da177e4 | 438 | } |
836cf046 DA |
439 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
440 | ||
1da177e4 LT |
441 | return 0; |
442 | } | |
4e74f36d | 443 | EXPORT_SYMBOL(drm_rmmap_locked); |
836cf046 | 444 | |
f77d390c | 445 | int drm_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 DA |
446 | { |
447 | int ret; | |
448 | ||
30e2fb18 | 449 | mutex_lock(&dev->struct_mutex); |
836cf046 | 450 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 451 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
452 | |
453 | return ret; | |
454 | } | |
ba8bbcf6 | 455 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 456 | |
836cf046 DA |
457 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
458 | * the last close of the device, and this is necessary for cleanup when things | |
459 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
460 | * like a pointless exercise since they're going away anyway. | |
461 | * | |
462 | * One use case might be after addmap is allowed for normal users for SHM and | |
463 | * gets used by drivers that the server doesn't need to care about. This seems | |
464 | * unlikely. | |
f77d390c BH |
465 | * |
466 | * \param inode device inode. | |
467 | * \param file_priv DRM file private. | |
468 | * \param cmd command. | |
469 | * \param arg pointer to a struct drm_map structure. | |
470 | * \return zero on success or a negative value on error. | |
836cf046 | 471 | */ |
c153f45f EA |
472 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
473 | struct drm_file *file_priv) | |
7ab98401 | 474 | { |
c153f45f | 475 | struct drm_map *request = data; |
f77d390c | 476 | struct drm_local_map *map = NULL; |
55910517 | 477 | struct drm_map_list *r_list; |
836cf046 | 478 | int ret; |
7ab98401 | 479 | |
30e2fb18 | 480 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 481 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 482 | if (r_list->map && |
c153f45f | 483 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
484 | r_list->map->flags & _DRM_REMOVABLE) { |
485 | map = r_list->map; | |
486 | break; | |
487 | } | |
488 | } | |
489 | ||
490 | /* List has wrapped around to the head pointer, or its empty we didn't | |
491 | * find anything. | |
492 | */ | |
bd1b331f | 493 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 494 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
495 | return -EINVAL; |
496 | } | |
497 | ||
836cf046 DA |
498 | /* Register and framebuffer maps are permanent */ |
499 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 500 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
501 | return 0; |
502 | } | |
503 | ||
504 | ret = drm_rmmap_locked(dev, map); | |
505 | ||
30e2fb18 | 506 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
507 | |
508 | return ret; | |
7ab98401 | 509 | } |
1da177e4 LT |
510 | |
511 | /** | |
512 | * Cleanup after an error on one of the addbufs() functions. | |
513 | * | |
836cf046 | 514 | * \param dev DRM device. |
1da177e4 LT |
515 | * \param entry buffer entry where the error occurred. |
516 | * | |
517 | * Frees any pages and buffers associated with the given entry. | |
518 | */ | |
cdd55a29 DA |
519 | static void drm_cleanup_buf_error(struct drm_device * dev, |
520 | struct drm_buf_entry * entry) | |
1da177e4 LT |
521 | { |
522 | int i; | |
523 | ||
524 | if (entry->seg_count) { | |
525 | for (i = 0; i < entry->seg_count; i++) { | |
526 | if (entry->seglist[i]) { | |
ddf19b97 | 527 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
528 | } |
529 | } | |
530 | drm_free(entry->seglist, | |
b5e89ed5 DA |
531 | entry->seg_count * |
532 | sizeof(*entry->seglist), DRM_MEM_SEGS); | |
1da177e4 LT |
533 | |
534 | entry->seg_count = 0; | |
535 | } | |
536 | ||
b5e89ed5 DA |
537 | if (entry->buf_count) { |
538 | for (i = 0; i < entry->buf_count; i++) { | |
1da177e4 LT |
539 | if (entry->buflist[i].dev_private) { |
540 | drm_free(entry->buflist[i].dev_private, | |
b5e89ed5 DA |
541 | entry->buflist[i].dev_priv_size, |
542 | DRM_MEM_BUFS); | |
1da177e4 LT |
543 | } |
544 | } | |
545 | drm_free(entry->buflist, | |
b5e89ed5 DA |
546 | entry->buf_count * |
547 | sizeof(*entry->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
548 | |
549 | entry->buf_count = 0; | |
550 | } | |
551 | } | |
552 | ||
553 | #if __OS_HAS_AGP | |
554 | /** | |
d59431bf | 555 | * Add AGP buffers for DMA transfers. |
1da177e4 | 556 | * |
84b1fd10 | 557 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 558 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 559 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 560 | * |
1da177e4 LT |
561 | * After some sanity checks creates a drm_buf structure for each buffer and |
562 | * reallocates the buffer list of the same size order to accommodate the new | |
563 | * buffers. | |
564 | */ | |
84b1fd10 | 565 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 566 | { |
cdd55a29 DA |
567 | struct drm_device_dma *dma = dev->dma; |
568 | struct drm_buf_entry *entry; | |
55910517 | 569 | struct drm_agp_mem *agp_entry; |
056219e2 | 570 | struct drm_buf *buf; |
1da177e4 LT |
571 | unsigned long offset; |
572 | unsigned long agp_offset; | |
573 | int count; | |
574 | int order; | |
575 | int size; | |
576 | int alignment; | |
577 | int page_order; | |
578 | int total; | |
579 | int byte_count; | |
54ba2f76 | 580 | int i, valid; |
056219e2 | 581 | struct drm_buf **temp_buflist; |
1da177e4 | 582 | |
b5e89ed5 DA |
583 | if (!dma) |
584 | return -EINVAL; | |
1da177e4 | 585 | |
d59431bf DA |
586 | count = request->count; |
587 | order = drm_order(request->size); | |
1da177e4 LT |
588 | size = 1 << order; |
589 | ||
b5e89ed5 DA |
590 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
591 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
592 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
593 | total = PAGE_SIZE << page_order; | |
594 | ||
595 | byte_count = 0; | |
d59431bf | 596 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 597 | |
b5e89ed5 DA |
598 | DRM_DEBUG("count: %d\n", count); |
599 | DRM_DEBUG("order: %d\n", order); | |
600 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 601 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
602 | DRM_DEBUG("alignment: %d\n", alignment); |
603 | DRM_DEBUG("page_order: %d\n", page_order); | |
604 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 605 | |
b5e89ed5 DA |
606 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
607 | return -EINVAL; | |
608 | if (dev->queue_count) | |
609 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 610 | |
54ba2f76 DA |
611 | /* Make sure buffers are located in AGP memory that we own */ |
612 | valid = 0; | |
bd1b331f | 613 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
614 | if ((agp_offset >= agp_entry->bound) && |
615 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
616 | valid = 1; | |
617 | break; | |
618 | } | |
619 | } | |
bd1b331f | 620 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
621 | DRM_DEBUG("zone invalid\n"); |
622 | return -EINVAL; | |
623 | } | |
b5e89ed5 DA |
624 | spin_lock(&dev->count_lock); |
625 | if (dev->buf_use) { | |
626 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
627 | return -EBUSY; |
628 | } | |
b5e89ed5 DA |
629 | atomic_inc(&dev->buf_alloc); |
630 | spin_unlock(&dev->count_lock); | |
1da177e4 | 631 | |
30e2fb18 | 632 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 633 | entry = &dma->bufs[order]; |
b5e89ed5 | 634 | if (entry->buf_count) { |
30e2fb18 | 635 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
636 | atomic_dec(&dev->buf_alloc); |
637 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
638 | } |
639 | ||
640 | if (count < 0 || count > 4096) { | |
30e2fb18 | 641 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 642 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
643 | return -EINVAL; |
644 | } | |
645 | ||
b5e89ed5 DA |
646 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
647 | DRM_MEM_BUFS); | |
648 | if (!entry->buflist) { | |
30e2fb18 | 649 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 650 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
651 | return -ENOMEM; |
652 | } | |
b5e89ed5 | 653 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
654 | |
655 | entry->buf_size = size; | |
656 | entry->page_order = page_order; | |
657 | ||
658 | offset = 0; | |
659 | ||
b5e89ed5 DA |
660 | while (entry->buf_count < count) { |
661 | buf = &entry->buflist[entry->buf_count]; | |
662 | buf->idx = dma->buf_count + entry->buf_count; | |
663 | buf->total = alignment; | |
664 | buf->order = order; | |
665 | buf->used = 0; | |
1da177e4 | 666 | |
b5e89ed5 | 667 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
668 | buf->bus_address = agp_offset + offset; |
669 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 670 | buf->next = NULL; |
1da177e4 LT |
671 | buf->waiting = 0; |
672 | buf->pending = 0; | |
b5e89ed5 | 673 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 674 | buf->file_priv = NULL; |
1da177e4 LT |
675 | |
676 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
677 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
678 | if (!buf->dev_private) { | |
1da177e4 LT |
679 | /* Set count correctly so we free the proper amount. */ |
680 | entry->buf_count = count; | |
b5e89ed5 | 681 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 682 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 683 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
684 | return -ENOMEM; |
685 | } | |
b5e89ed5 | 686 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 687 | |
b5e89ed5 | 688 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
689 | |
690 | offset += alignment; | |
691 | entry->buf_count++; | |
692 | byte_count += PAGE_SIZE << page_order; | |
693 | } | |
694 | ||
b5e89ed5 | 695 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 696 | |
b5e89ed5 DA |
697 | temp_buflist = drm_realloc(dma->buflist, |
698 | dma->buf_count * sizeof(*dma->buflist), | |
699 | (dma->buf_count + entry->buf_count) | |
700 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
701 | if (!temp_buflist) { | |
1da177e4 | 702 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 703 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 704 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 705 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
706 | return -ENOMEM; |
707 | } | |
708 | dma->buflist = temp_buflist; | |
709 | ||
b5e89ed5 | 710 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
711 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
712 | } | |
713 | ||
714 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
715 | dma->seg_count += entry->seg_count; |
716 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
717 | dma->byte_count += byte_count; |
718 | ||
b5e89ed5 DA |
719 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
720 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 721 | |
30e2fb18 | 722 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 723 | |
d59431bf DA |
724 | request->count = entry->buf_count; |
725 | request->size = size; | |
1da177e4 LT |
726 | |
727 | dma->flags = _DRM_DMA_USE_AGP; | |
728 | ||
b5e89ed5 | 729 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
730 | return 0; |
731 | } | |
d84f76d3 | 732 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 733 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 734 | |
84b1fd10 | 735 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 736 | { |
cdd55a29 | 737 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
738 | int count; |
739 | int order; | |
740 | int size; | |
741 | int total; | |
742 | int page_order; | |
cdd55a29 | 743 | struct drm_buf_entry *entry; |
ddf19b97 | 744 | drm_dma_handle_t *dmah; |
056219e2 | 745 | struct drm_buf *buf; |
1da177e4 LT |
746 | int alignment; |
747 | unsigned long offset; | |
748 | int i; | |
749 | int byte_count; | |
750 | int page_count; | |
751 | unsigned long *temp_pagelist; | |
056219e2 | 752 | struct drm_buf **temp_buflist; |
1da177e4 | 753 | |
b5e89ed5 DA |
754 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
755 | return -EINVAL; | |
d985c108 | 756 | |
b5e89ed5 DA |
757 | if (!dma) |
758 | return -EINVAL; | |
1da177e4 | 759 | |
d985c108 DA |
760 | if (!capable(CAP_SYS_ADMIN)) |
761 | return -EPERM; | |
762 | ||
d59431bf DA |
763 | count = request->count; |
764 | order = drm_order(request->size); | |
1da177e4 LT |
765 | size = 1 << order; |
766 | ||
b5e89ed5 DA |
767 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
768 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 769 | |
b5e89ed5 DA |
770 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
771 | return -EINVAL; | |
772 | if (dev->queue_count) | |
773 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 774 | |
d59431bf | 775 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 776 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
777 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
778 | total = PAGE_SIZE << page_order; | |
779 | ||
b5e89ed5 DA |
780 | spin_lock(&dev->count_lock); |
781 | if (dev->buf_use) { | |
782 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
783 | return -EBUSY; |
784 | } | |
b5e89ed5 DA |
785 | atomic_inc(&dev->buf_alloc); |
786 | spin_unlock(&dev->count_lock); | |
1da177e4 | 787 | |
30e2fb18 | 788 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 789 | entry = &dma->bufs[order]; |
b5e89ed5 | 790 | if (entry->buf_count) { |
30e2fb18 | 791 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 792 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
793 | return -ENOMEM; /* May only call once for each order */ |
794 | } | |
795 | ||
796 | if (count < 0 || count > 4096) { | |
30e2fb18 | 797 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 798 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
799 | return -EINVAL; |
800 | } | |
801 | ||
b5e89ed5 DA |
802 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
803 | DRM_MEM_BUFS); | |
804 | if (!entry->buflist) { | |
30e2fb18 | 805 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 806 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
807 | return -ENOMEM; |
808 | } | |
b5e89ed5 DA |
809 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
810 | ||
811 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), | |
812 | DRM_MEM_SEGS); | |
813 | if (!entry->seglist) { | |
814 | drm_free(entry->buflist, | |
815 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
30e2fb18 | 816 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 817 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
818 | return -ENOMEM; |
819 | } | |
b5e89ed5 | 820 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
821 | |
822 | /* Keep the original pagelist until we know all the allocations | |
823 | * have succeeded | |
824 | */ | |
b5e89ed5 DA |
825 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
826 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
1da177e4 | 827 | if (!temp_pagelist) { |
b5e89ed5 DA |
828 | drm_free(entry->buflist, |
829 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
830 | drm_free(entry->seglist, | |
831 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); | |
30e2fb18 | 832 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 833 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
834 | return -ENOMEM; |
835 | } | |
836 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
837 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
838 | DRM_DEBUG("pagelist: %d entries\n", | |
839 | dma->page_count + (count << page_order)); | |
1da177e4 | 840 | |
b5e89ed5 | 841 | entry->buf_size = size; |
1da177e4 LT |
842 | entry->page_order = page_order; |
843 | byte_count = 0; | |
844 | page_count = 0; | |
845 | ||
b5e89ed5 | 846 | while (entry->buf_count < count) { |
bc5f4523 | 847 | |
ddf19b97 | 848 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); |
bc5f4523 | 849 | |
ddf19b97 | 850 | if (!dmah) { |
1da177e4 LT |
851 | /* Set count correctly so we free the proper amount. */ |
852 | entry->buf_count = count; | |
853 | entry->seg_count = count; | |
854 | drm_cleanup_buf_error(dev, entry); | |
b5e89ed5 DA |
855 | drm_free(temp_pagelist, |
856 | (dma->page_count + (count << page_order)) | |
857 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 858 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 859 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
860 | return -ENOMEM; |
861 | } | |
ddf19b97 | 862 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
863 | for (i = 0; i < (1 << page_order); i++) { |
864 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
865 | dma->page_count + page_count, | |
ddf19b97 | 866 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 867 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 868 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 869 | } |
b5e89ed5 DA |
870 | for (offset = 0; |
871 | offset + size <= total && entry->buf_count < count; | |
872 | offset += alignment, ++entry->buf_count) { | |
873 | buf = &entry->buflist[entry->buf_count]; | |
874 | buf->idx = dma->buf_count + entry->buf_count; | |
875 | buf->total = alignment; | |
876 | buf->order = order; | |
877 | buf->used = 0; | |
878 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
879 | buf->address = (void *)(dmah->vaddr + offset); |
880 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 881 | buf->next = NULL; |
1da177e4 LT |
882 | buf->waiting = 0; |
883 | buf->pending = 0; | |
b5e89ed5 | 884 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 885 | buf->file_priv = NULL; |
1da177e4 LT |
886 | |
887 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
888 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
889 | DRM_MEM_BUFS); | |
890 | if (!buf->dev_private) { | |
1da177e4 LT |
891 | /* Set count correctly so we free the proper amount. */ |
892 | entry->buf_count = count; | |
893 | entry->seg_count = count; | |
b5e89ed5 DA |
894 | drm_cleanup_buf_error(dev, entry); |
895 | drm_free(temp_pagelist, | |
896 | (dma->page_count + | |
897 | (count << page_order)) | |
898 | * sizeof(*dma->pagelist), | |
899 | DRM_MEM_PAGES); | |
30e2fb18 | 900 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 901 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
902 | return -ENOMEM; |
903 | } | |
b5e89ed5 | 904 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 905 | |
b5e89ed5 DA |
906 | DRM_DEBUG("buffer %d @ %p\n", |
907 | entry->buf_count, buf->address); | |
1da177e4 LT |
908 | } |
909 | byte_count += PAGE_SIZE << page_order; | |
910 | } | |
911 | ||
b5e89ed5 DA |
912 | temp_buflist = drm_realloc(dma->buflist, |
913 | dma->buf_count * sizeof(*dma->buflist), | |
914 | (dma->buf_count + entry->buf_count) | |
915 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
916 | if (!temp_buflist) { |
917 | /* Free the entry because it isn't valid */ | |
b5e89ed5 DA |
918 | drm_cleanup_buf_error(dev, entry); |
919 | drm_free(temp_pagelist, | |
920 | (dma->page_count + (count << page_order)) | |
921 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 922 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 923 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
924 | return -ENOMEM; |
925 | } | |
926 | dma->buflist = temp_buflist; | |
927 | ||
b5e89ed5 | 928 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
929 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
930 | } | |
931 | ||
932 | /* No allocations failed, so now we can replace the orginal pagelist | |
933 | * with the new one. | |
934 | */ | |
935 | if (dma->page_count) { | |
936 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
937 | dma->page_count * sizeof(*dma->pagelist), |
938 | DRM_MEM_PAGES); | |
1da177e4 LT |
939 | } |
940 | dma->pagelist = temp_pagelist; | |
941 | ||
942 | dma->buf_count += entry->buf_count; | |
943 | dma->seg_count += entry->seg_count; | |
944 | dma->page_count += entry->seg_count << page_order; | |
945 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
946 | ||
30e2fb18 | 947 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 948 | |
d59431bf DA |
949 | request->count = entry->buf_count; |
950 | request->size = size; | |
1da177e4 | 951 | |
3417f33e GS |
952 | if (request->flags & _DRM_PCI_BUFFER_RO) |
953 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
954 | ||
b5e89ed5 | 955 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
956 | return 0; |
957 | ||
958 | } | |
d84f76d3 | 959 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 960 | |
84b1fd10 | 961 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 962 | { |
cdd55a29 DA |
963 | struct drm_device_dma *dma = dev->dma; |
964 | struct drm_buf_entry *entry; | |
056219e2 | 965 | struct drm_buf *buf; |
1da177e4 LT |
966 | unsigned long offset; |
967 | unsigned long agp_offset; | |
968 | int count; | |
969 | int order; | |
970 | int size; | |
971 | int alignment; | |
972 | int page_order; | |
973 | int total; | |
974 | int byte_count; | |
975 | int i; | |
056219e2 | 976 | struct drm_buf **temp_buflist; |
1da177e4 | 977 | |
b5e89ed5 DA |
978 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
979 | return -EINVAL; | |
980 | ||
981 | if (!dma) | |
982 | return -EINVAL; | |
1da177e4 | 983 | |
d985c108 DA |
984 | if (!capable(CAP_SYS_ADMIN)) |
985 | return -EPERM; | |
986 | ||
d59431bf DA |
987 | count = request->count; |
988 | order = drm_order(request->size); | |
1da177e4 LT |
989 | size = 1 << order; |
990 | ||
b5e89ed5 DA |
991 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
992 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
993 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
994 | total = PAGE_SIZE << page_order; | |
995 | ||
996 | byte_count = 0; | |
d59431bf | 997 | agp_offset = request->agp_start; |
1da177e4 | 998 | |
b5e89ed5 DA |
999 | DRM_DEBUG("count: %d\n", count); |
1000 | DRM_DEBUG("order: %d\n", order); | |
1001 | DRM_DEBUG("size: %d\n", size); | |
1002 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1003 | DRM_DEBUG("alignment: %d\n", alignment); | |
1004 | DRM_DEBUG("page_order: %d\n", page_order); | |
1005 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1006 | |
b5e89ed5 DA |
1007 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1008 | return -EINVAL; | |
1009 | if (dev->queue_count) | |
1010 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1011 | |
b5e89ed5 DA |
1012 | spin_lock(&dev->count_lock); |
1013 | if (dev->buf_use) { | |
1014 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1015 | return -EBUSY; |
1016 | } | |
b5e89ed5 DA |
1017 | atomic_inc(&dev->buf_alloc); |
1018 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1019 | |
30e2fb18 | 1020 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1021 | entry = &dma->bufs[order]; |
b5e89ed5 | 1022 | if (entry->buf_count) { |
30e2fb18 | 1023 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1024 | atomic_dec(&dev->buf_alloc); |
1025 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1026 | } |
1027 | ||
1028 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1029 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1030 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1031 | return -EINVAL; |
1032 | } | |
1033 | ||
b5e89ed5 DA |
1034 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
1035 | DRM_MEM_BUFS); | |
1036 | if (!entry->buflist) { | |
30e2fb18 | 1037 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1038 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1039 | return -ENOMEM; |
1040 | } | |
b5e89ed5 | 1041 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
1042 | |
1043 | entry->buf_size = size; | |
1044 | entry->page_order = page_order; | |
1045 | ||
1046 | offset = 0; | |
1047 | ||
b5e89ed5 DA |
1048 | while (entry->buf_count < count) { |
1049 | buf = &entry->buflist[entry->buf_count]; | |
1050 | buf->idx = dma->buf_count + entry->buf_count; | |
1051 | buf->total = alignment; | |
1052 | buf->order = order; | |
1053 | buf->used = 0; | |
1da177e4 | 1054 | |
b5e89ed5 | 1055 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1056 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1057 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1058 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1059 | buf->next = NULL; |
1da177e4 LT |
1060 | buf->waiting = 0; |
1061 | buf->pending = 0; | |
b5e89ed5 | 1062 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 1063 | buf->file_priv = NULL; |
1da177e4 LT |
1064 | |
1065 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
1066 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
1067 | if (!buf->dev_private) { | |
1da177e4 LT |
1068 | /* Set count correctly so we free the proper amount. */ |
1069 | entry->buf_count = count; | |
b5e89ed5 | 1070 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1071 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1072 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1073 | return -ENOMEM; |
1074 | } | |
1075 | ||
b5e89ed5 | 1076 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1077 | |
b5e89ed5 | 1078 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1079 | |
1080 | offset += alignment; | |
1081 | entry->buf_count++; | |
1082 | byte_count += PAGE_SIZE << page_order; | |
1083 | } | |
1084 | ||
b5e89ed5 | 1085 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1086 | |
b5e89ed5 DA |
1087 | temp_buflist = drm_realloc(dma->buflist, |
1088 | dma->buf_count * sizeof(*dma->buflist), | |
1089 | (dma->buf_count + entry->buf_count) | |
1090 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1091 | if (!temp_buflist) { | |
1da177e4 | 1092 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1093 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1094 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1095 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1096 | return -ENOMEM; |
1097 | } | |
1098 | dma->buflist = temp_buflist; | |
1099 | ||
b5e89ed5 | 1100 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1101 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1102 | } | |
1103 | ||
1104 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1105 | dma->seg_count += entry->seg_count; |
1106 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1107 | dma->byte_count += byte_count; |
1108 | ||
b5e89ed5 DA |
1109 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1110 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1111 | |
30e2fb18 | 1112 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1113 | |
d59431bf DA |
1114 | request->count = entry->buf_count; |
1115 | request->size = size; | |
1da177e4 LT |
1116 | |
1117 | dma->flags = _DRM_DMA_USE_SG; | |
1118 | ||
b5e89ed5 | 1119 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1120 | return 0; |
1121 | } | |
1122 | ||
84b1fd10 | 1123 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1124 | { |
cdd55a29 DA |
1125 | struct drm_device_dma *dma = dev->dma; |
1126 | struct drm_buf_entry *entry; | |
056219e2 | 1127 | struct drm_buf *buf; |
b84397d6 DA |
1128 | unsigned long offset; |
1129 | unsigned long agp_offset; | |
1130 | int count; | |
1131 | int order; | |
1132 | int size; | |
1133 | int alignment; | |
1134 | int page_order; | |
1135 | int total; | |
1136 | int byte_count; | |
1137 | int i; | |
056219e2 | 1138 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1139 | |
1140 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1141 | return -EINVAL; | |
b5e89ed5 | 1142 | |
b84397d6 DA |
1143 | if (!dma) |
1144 | return -EINVAL; | |
1145 | ||
d985c108 DA |
1146 | if (!capable(CAP_SYS_ADMIN)) |
1147 | return -EPERM; | |
1148 | ||
d59431bf DA |
1149 | count = request->count; |
1150 | order = drm_order(request->size); | |
b84397d6 DA |
1151 | size = 1 << order; |
1152 | ||
d59431bf | 1153 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1154 | ? PAGE_ALIGN(size) : size; |
1155 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1156 | total = PAGE_SIZE << page_order; | |
1157 | ||
1158 | byte_count = 0; | |
d59431bf | 1159 | agp_offset = request->agp_start; |
b84397d6 DA |
1160 | |
1161 | DRM_DEBUG("count: %d\n", count); | |
1162 | DRM_DEBUG("order: %d\n", order); | |
1163 | DRM_DEBUG("size: %d\n", size); | |
1164 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1165 | DRM_DEBUG("alignment: %d\n", alignment); | |
1166 | DRM_DEBUG("page_order: %d\n", page_order); | |
1167 | DRM_DEBUG("total: %d\n", total); | |
1168 | ||
1169 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1170 | return -EINVAL; | |
1171 | if (dev->queue_count) | |
1172 | return -EBUSY; /* Not while in use */ | |
1173 | ||
1174 | spin_lock(&dev->count_lock); | |
1175 | if (dev->buf_use) { | |
1176 | spin_unlock(&dev->count_lock); | |
1177 | return -EBUSY; | |
1178 | } | |
1179 | atomic_inc(&dev->buf_alloc); | |
1180 | spin_unlock(&dev->count_lock); | |
1181 | ||
30e2fb18 | 1182 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1183 | entry = &dma->bufs[order]; |
1184 | if (entry->buf_count) { | |
30e2fb18 | 1185 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1186 | atomic_dec(&dev->buf_alloc); |
1187 | return -ENOMEM; /* May only call once for each order */ | |
1188 | } | |
1189 | ||
1190 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1191 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1192 | atomic_dec(&dev->buf_alloc); |
1193 | return -EINVAL; | |
1194 | } | |
1195 | ||
1196 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), | |
1197 | DRM_MEM_BUFS); | |
1198 | if (!entry->buflist) { | |
30e2fb18 | 1199 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1200 | atomic_dec(&dev->buf_alloc); |
1201 | return -ENOMEM; | |
1202 | } | |
1203 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1204 | ||
1205 | entry->buf_size = size; | |
1206 | entry->page_order = page_order; | |
1207 | ||
1208 | offset = 0; | |
1209 | ||
1210 | while (entry->buf_count < count) { | |
1211 | buf = &entry->buflist[entry->buf_count]; | |
1212 | buf->idx = dma->buf_count + entry->buf_count; | |
1213 | buf->total = alignment; | |
1214 | buf->order = order; | |
1215 | buf->used = 0; | |
1216 | ||
1217 | buf->offset = (dma->byte_count + offset); | |
1218 | buf->bus_address = agp_offset + offset; | |
1219 | buf->address = (void *)(agp_offset + offset); | |
1220 | buf->next = NULL; | |
1221 | buf->waiting = 0; | |
1222 | buf->pending = 0; | |
1223 | init_waitqueue_head(&buf->dma_wait); | |
6c340eac | 1224 | buf->file_priv = NULL; |
b84397d6 DA |
1225 | |
1226 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
1227 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); | |
1228 | if (!buf->dev_private) { | |
1229 | /* Set count correctly so we free the proper amount. */ | |
1230 | entry->buf_count = count; | |
1231 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1232 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1233 | atomic_dec(&dev->buf_alloc); |
1234 | return -ENOMEM; | |
1235 | } | |
1236 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1237 | ||
1238 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1239 | ||
1240 | offset += alignment; | |
1241 | entry->buf_count++; | |
1242 | byte_count += PAGE_SIZE << page_order; | |
1243 | } | |
1244 | ||
1245 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1246 | ||
1247 | temp_buflist = drm_realloc(dma->buflist, | |
1248 | dma->buf_count * sizeof(*dma->buflist), | |
1249 | (dma->buf_count + entry->buf_count) | |
1250 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1251 | if (!temp_buflist) { | |
1252 | /* Free the entry because it isn't valid */ | |
1253 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1254 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1255 | atomic_dec(&dev->buf_alloc); |
1256 | return -ENOMEM; | |
1257 | } | |
1258 | dma->buflist = temp_buflist; | |
1259 | ||
1260 | for (i = 0; i < entry->buf_count; i++) { | |
1261 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1262 | } | |
1263 | ||
1264 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1265 | dma->seg_count += entry->seg_count; |
1266 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1267 | dma->byte_count += byte_count; |
1268 | ||
1269 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1270 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1271 | ||
30e2fb18 | 1272 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1273 | |
d59431bf DA |
1274 | request->count = entry->buf_count; |
1275 | request->size = size; | |
b84397d6 DA |
1276 | |
1277 | dma->flags = _DRM_DMA_USE_FB; | |
1278 | ||
1279 | atomic_dec(&dev->buf_alloc); | |
1280 | return 0; | |
1281 | } | |
d985c108 | 1282 | |
b84397d6 | 1283 | |
1da177e4 LT |
1284 | /** |
1285 | * Add buffers for DMA transfers (ioctl). | |
1286 | * | |
1287 | * \param inode device inode. | |
6c340eac | 1288 | * \param file_priv DRM file private. |
1da177e4 | 1289 | * \param cmd command. |
c60ce623 | 1290 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1291 | * \return zero on success or a negative number on failure. |
1292 | * | |
1293 | * According with the memory type specified in drm_buf_desc::flags and the | |
1294 | * build options, it dispatches the call either to addbufs_agp(), | |
1295 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1296 | * PCI memory respectively. | |
1297 | */ | |
c153f45f EA |
1298 | int drm_addbufs(struct drm_device *dev, void *data, |
1299 | struct drm_file *file_priv) | |
1da177e4 | 1300 | { |
c153f45f | 1301 | struct drm_buf_desc *request = data; |
d59431bf | 1302 | int ret; |
b5e89ed5 | 1303 | |
1da177e4 LT |
1304 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1305 | return -EINVAL; | |
1306 | ||
1da177e4 | 1307 | #if __OS_HAS_AGP |
c153f45f EA |
1308 | if (request->flags & _DRM_AGP_BUFFER) |
1309 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1310 | else |
1311 | #endif | |
c153f45f EA |
1312 | if (request->flags & _DRM_SG_BUFFER) |
1313 | ret = drm_addbufs_sg(dev, request); | |
1314 | else if (request->flags & _DRM_FB_BUFFER) | |
1315 | ret = drm_addbufs_fb(dev, request); | |
1da177e4 | 1316 | else |
c153f45f | 1317 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1318 | |
d59431bf | 1319 | return ret; |
1da177e4 LT |
1320 | } |
1321 | ||
1da177e4 LT |
1322 | /** |
1323 | * Get information about the buffer mappings. | |
1324 | * | |
1325 | * This was originally mean for debugging purposes, or by a sophisticated | |
1326 | * client library to determine how best to use the available buffers (e.g., | |
1327 | * large buffers can be used for image transfer). | |
1328 | * | |
1329 | * \param inode device inode. | |
6c340eac | 1330 | * \param file_priv DRM file private. |
1da177e4 LT |
1331 | * \param cmd command. |
1332 | * \param arg pointer to a drm_buf_info structure. | |
1333 | * \return zero on success or a negative number on failure. | |
1334 | * | |
1335 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1336 | * lock, preventing of allocating more buffers after this call. Information | |
1337 | * about each requested buffer is then copied into user space. | |
1338 | */ | |
c153f45f EA |
1339 | int drm_infobufs(struct drm_device *dev, void *data, |
1340 | struct drm_file *file_priv) | |
1da177e4 | 1341 | { |
cdd55a29 | 1342 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1343 | struct drm_buf_info *request = data; |
1da177e4 LT |
1344 | int i; |
1345 | int count; | |
1346 | ||
1347 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1348 | return -EINVAL; | |
1349 | ||
b5e89ed5 DA |
1350 | if (!dma) |
1351 | return -EINVAL; | |
1da177e4 | 1352 | |
b5e89ed5 DA |
1353 | spin_lock(&dev->count_lock); |
1354 | if (atomic_read(&dev->buf_alloc)) { | |
1355 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1356 | return -EBUSY; |
1357 | } | |
1358 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1359 | spin_unlock(&dev->count_lock); |
1da177e4 | 1360 | |
b5e89ed5 DA |
1361 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1362 | if (dma->bufs[i].buf_count) | |
1363 | ++count; | |
1da177e4 LT |
1364 | } |
1365 | ||
b5e89ed5 | 1366 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1367 | |
c153f45f | 1368 | if (request->count >= count) { |
b5e89ed5 DA |
1369 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1370 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1371 | struct drm_buf_desc __user *to = |
c153f45f | 1372 | &request->list[count]; |
cdd55a29 DA |
1373 | struct drm_buf_entry *from = &dma->bufs[i]; |
1374 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1375 | if (copy_to_user(&to->count, |
1376 | &from->buf_count, | |
1377 | sizeof(from->buf_count)) || | |
1378 | copy_to_user(&to->size, | |
1379 | &from->buf_size, | |
1380 | sizeof(from->buf_size)) || | |
1381 | copy_to_user(&to->low_mark, | |
1382 | &list->low_mark, | |
1383 | sizeof(list->low_mark)) || | |
1384 | copy_to_user(&to->high_mark, | |
1385 | &list->high_mark, | |
1386 | sizeof(list->high_mark))) | |
1da177e4 LT |
1387 | return -EFAULT; |
1388 | ||
b5e89ed5 DA |
1389 | DRM_DEBUG("%d %d %d %d %d\n", |
1390 | i, | |
1391 | dma->bufs[i].buf_count, | |
1392 | dma->bufs[i].buf_size, | |
1393 | dma->bufs[i].freelist.low_mark, | |
1394 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1395 | ++count; |
1396 | } | |
1397 | } | |
1398 | } | |
c153f45f | 1399 | request->count = count; |
1da177e4 LT |
1400 | |
1401 | return 0; | |
1402 | } | |
1403 | ||
1404 | /** | |
1405 | * Specifies a low and high water mark for buffer allocation | |
1406 | * | |
1407 | * \param inode device inode. | |
6c340eac | 1408 | * \param file_priv DRM file private. |
1da177e4 LT |
1409 | * \param cmd command. |
1410 | * \param arg a pointer to a drm_buf_desc structure. | |
1411 | * \return zero on success or a negative number on failure. | |
1412 | * | |
1413 | * Verifies that the size order is bounded between the admissible orders and | |
1414 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1415 | * | |
1416 | * \note This ioctl is deprecated and mostly never used. | |
1417 | */ | |
c153f45f EA |
1418 | int drm_markbufs(struct drm_device *dev, void *data, |
1419 | struct drm_file *file_priv) | |
1da177e4 | 1420 | { |
cdd55a29 | 1421 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1422 | struct drm_buf_desc *request = data; |
1da177e4 | 1423 | int order; |
cdd55a29 | 1424 | struct drm_buf_entry *entry; |
1da177e4 LT |
1425 | |
1426 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1427 | return -EINVAL; | |
1428 | ||
b5e89ed5 DA |
1429 | if (!dma) |
1430 | return -EINVAL; | |
1da177e4 | 1431 | |
b5e89ed5 | 1432 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f EA |
1433 | request->size, request->low_mark, request->high_mark); |
1434 | order = drm_order(request->size); | |
b5e89ed5 DA |
1435 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1436 | return -EINVAL; | |
1da177e4 LT |
1437 | entry = &dma->bufs[order]; |
1438 | ||
c153f45f | 1439 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1440 | return -EINVAL; |
c153f45f | 1441 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1442 | return -EINVAL; |
1443 | ||
c153f45f EA |
1444 | entry->freelist.low_mark = request->low_mark; |
1445 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1446 | |
1447 | return 0; | |
1448 | } | |
1449 | ||
1450 | /** | |
b5e89ed5 | 1451 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1452 | * |
1453 | * \param inode device inode. | |
6c340eac | 1454 | * \param file_priv DRM file private. |
1da177e4 LT |
1455 | * \param cmd command. |
1456 | * \param arg pointer to a drm_buf_free structure. | |
1457 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1458 | * |
1da177e4 LT |
1459 | * Calls free_buffer() for each used buffer. |
1460 | * This function is primarily used for debugging. | |
1461 | */ | |
c153f45f EA |
1462 | int drm_freebufs(struct drm_device *dev, void *data, |
1463 | struct drm_file *file_priv) | |
1da177e4 | 1464 | { |
cdd55a29 | 1465 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1466 | struct drm_buf_free *request = data; |
1da177e4 LT |
1467 | int i; |
1468 | int idx; | |
056219e2 | 1469 | struct drm_buf *buf; |
1da177e4 LT |
1470 | |
1471 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1472 | return -EINVAL; | |
1473 | ||
b5e89ed5 DA |
1474 | if (!dma) |
1475 | return -EINVAL; | |
1da177e4 | 1476 | |
c153f45f EA |
1477 | DRM_DEBUG("%d\n", request->count); |
1478 | for (i = 0; i < request->count; i++) { | |
1479 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1480 | return -EFAULT; |
b5e89ed5 DA |
1481 | if (idx < 0 || idx >= dma->buf_count) { |
1482 | DRM_ERROR("Index %d (of %d max)\n", | |
1483 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1484 | return -EINVAL; |
1485 | } | |
1486 | buf = dma->buflist[idx]; | |
6c340eac | 1487 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1488 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1489 | task_pid_nr(current)); |
1da177e4 LT |
1490 | return -EINVAL; |
1491 | } | |
b5e89ed5 | 1492 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1493 | } |
1494 | ||
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | /** | |
1499 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1500 | * | |
1501 | * \param inode device inode. | |
6c340eac | 1502 | * \param file_priv DRM file private. |
1da177e4 LT |
1503 | * \param cmd command. |
1504 | * \param arg pointer to a drm_buf_map structure. | |
1505 | * \return zero on success or a negative number on failure. | |
1506 | * | |
3417f33e GS |
1507 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1508 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1509 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1510 | * drm_mmap_dma(). | |
1da177e4 | 1511 | */ |
c153f45f EA |
1512 | int drm_mapbufs(struct drm_device *dev, void *data, |
1513 | struct drm_file *file_priv) | |
1da177e4 | 1514 | { |
cdd55a29 | 1515 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1516 | int retcode = 0; |
1517 | const int zero = 0; | |
1518 | unsigned long virtual; | |
1519 | unsigned long address; | |
c153f45f | 1520 | struct drm_buf_map *request = data; |
1da177e4 LT |
1521 | int i; |
1522 | ||
1523 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1524 | return -EINVAL; | |
1525 | ||
b5e89ed5 DA |
1526 | if (!dma) |
1527 | return -EINVAL; | |
1da177e4 | 1528 | |
b5e89ed5 DA |
1529 | spin_lock(&dev->count_lock); |
1530 | if (atomic_read(&dev->buf_alloc)) { | |
1531 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1532 | return -EBUSY; |
1533 | } | |
1534 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1535 | spin_unlock(&dev->count_lock); |
1da177e4 | 1536 | |
c153f45f | 1537 | if (request->count >= dma->buf_count) { |
b84397d6 | 1538 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1539 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1540 | && (dma->flags & _DRM_DMA_USE_SG)) |
1541 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1542 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
f77d390c | 1543 | struct drm_local_map *map = dev->agp_buffer_map; |
d1f2b55a | 1544 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1545 | |
b5e89ed5 | 1546 | if (!map) { |
1da177e4 LT |
1547 | retcode = -EINVAL; |
1548 | goto done; | |
1549 | } | |
b5e89ed5 | 1550 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1551 | virtual = do_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1552 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1553 | MAP_SHARED, |
1554 | token); | |
b5e89ed5 | 1555 | up_write(¤t->mm->mmap_sem); |
1da177e4 | 1556 | } else { |
b5e89ed5 | 1557 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1558 | virtual = do_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1559 | PROT_READ | PROT_WRITE, |
1560 | MAP_SHARED, 0); | |
1561 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1562 | } |
b5e89ed5 | 1563 | if (virtual > -1024UL) { |
1da177e4 LT |
1564 | /* Real error */ |
1565 | retcode = (signed long)virtual; | |
1566 | goto done; | |
1567 | } | |
c153f45f | 1568 | request->virtual = (void __user *)virtual; |
1da177e4 | 1569 | |
b5e89ed5 | 1570 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1571 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1572 | &dma->buflist[i]->idx, |
c153f45f | 1573 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1574 | retcode = -EFAULT; |
1575 | goto done; | |
1576 | } | |
c153f45f | 1577 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1578 | &dma->buflist[i]->total, |
c153f45f | 1579 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1580 | retcode = -EFAULT; |
1581 | goto done; | |
1582 | } | |
c153f45f | 1583 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1584 | &zero, sizeof(zero))) { |
1da177e4 LT |
1585 | retcode = -EFAULT; |
1586 | goto done; | |
1587 | } | |
b5e89ed5 | 1588 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1589 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1590 | &address, sizeof(address))) { |
1da177e4 LT |
1591 | retcode = -EFAULT; |
1592 | goto done; | |
1593 | } | |
1594 | } | |
1595 | } | |
b5e89ed5 | 1596 | done: |
c153f45f EA |
1597 | request->count = dma->buf_count; |
1598 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1599 | |
1600 | return retcode; | |
1601 | } | |
1602 | ||
836cf046 DA |
1603 | /** |
1604 | * Compute size order. Returns the exponent of the smaller power of two which | |
1605 | * is greater or equal to given number. | |
b5e89ed5 | 1606 | * |
836cf046 DA |
1607 | * \param size size. |
1608 | * \return order. | |
1609 | * | |
1610 | * \todo Can be made faster. | |
1611 | */ | |
b5e89ed5 | 1612 | int drm_order(unsigned long size) |
836cf046 DA |
1613 | { |
1614 | int order; | |
1615 | unsigned long tmp; | |
1616 | ||
b5e89ed5 | 1617 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1618 | |
1619 | if (size & (size - 1)) | |
1620 | ++order; | |
1621 | ||
1622 | return order; | |
1623 | } | |
1624 | EXPORT_SYMBOL(drm_order); |