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