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