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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 | ||
d883f7f1 | 39 | resource_size_t drm_get_resource_start(struct drm_device *dev, unsigned int resource) |
1da177e4 | 40 | { |
836cf046 DA |
41 | return pci_resource_start(dev->pdev, resource); |
42 | } | |
43 | EXPORT_SYMBOL(drm_get_resource_start); | |
1da177e4 | 44 | |
d883f7f1 | 45 | resource_size_t drm_get_resource_len(struct drm_device *dev, unsigned int resource) |
836cf046 DA |
46 | { |
47 | return pci_resource_len(dev->pdev, resource); | |
48 | } | |
b5e89ed5 | 49 | |
836cf046 | 50 | EXPORT_SYMBOL(drm_get_resource_len); |
1da177e4 | 51 | |
55910517 | 52 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
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 | ||
a2c0a97b JB |
264 | break; |
265 | case _DRM_GEM: | |
266 | DRM_ERROR("tried to rmmap GEM object\n"); | |
1da177e4 | 267 | break; |
54ba2f76 | 268 | } |
1da177e4 LT |
269 | case _DRM_SCATTER_GATHER: |
270 | if (!dev->sg) { | |
271 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
272 | return -EINVAL; | |
273 | } | |
d1f2b55a | 274 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 275 | break; |
b5e89ed5 | 276 | case _DRM_CONSISTENT: |
2d0f9eaf | 277 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 278 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
279 | * casting it down to 32 bits is no problem, but we |
280 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
281 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
282 | if (!dmah) { | |
2d0f9eaf DA |
283 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
284 | return -ENOMEM; | |
285 | } | |
9c8da5eb DA |
286 | map->handle = dmah->vaddr; |
287 | map->offset = (unsigned long)dmah->busaddr; | |
288 | kfree(dmah); | |
2d0f9eaf | 289 | break; |
1da177e4 | 290 | default: |
b5e89ed5 | 291 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
292 | return -EINVAL; |
293 | } | |
294 | ||
295 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); | |
b5e89ed5 | 296 | if (!list) { |
85abb3f9 | 297 | if (map->type == _DRM_REGISTERS) |
004a7727 | 298 | iounmap(map->handle); |
1da177e4 LT |
299 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
300 | return -EINVAL; | |
301 | } | |
302 | memset(list, 0, sizeof(*list)); | |
303 | list->map = map; | |
304 | ||
30e2fb18 | 305 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 306 | list_add(&list->head, &dev->maplist); |
8d153f71 | 307 | |
d1f2b55a | 308 | /* Assign a 32-bit handle */ |
30e2fb18 | 309 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
310 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
311 | map->offset; | |
a1d0fcf5 | 312 | ret = drm_map_handle(dev, &list->hash, user_token, 0); |
8d153f71 | 313 | if (ret) { |
85abb3f9 | 314 | if (map->type == _DRM_REGISTERS) |
004a7727 | 315 | iounmap(map->handle); |
8d153f71 TH |
316 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
317 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); | |
318 | mutex_unlock(&dev->struct_mutex); | |
319 | return ret; | |
320 | } | |
321 | ||
1545085a | 322 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 323 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 324 | |
7c1c2871 | 325 | list->master = dev->primary->master; |
89625eb1 | 326 | *maplist = list; |
7ab98401 | 327 | return 0; |
54ba2f76 | 328 | } |
89625eb1 | 329 | |
84b1fd10 | 330 | int drm_addmap(struct drm_device * dev, unsigned int offset, |
c60ce623 DA |
331 | unsigned int size, enum drm_map_type type, |
332 | enum drm_map_flags flags, drm_local_map_t ** map_ptr) | |
89625eb1 | 333 | { |
55910517 | 334 | struct drm_map_list *list; |
89625eb1 DA |
335 | int rc; |
336 | ||
337 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
338 | if (!rc) | |
339 | *map_ptr = list->map; | |
340 | return rc; | |
341 | } | |
b5e89ed5 | 342 | |
7ab98401 DA |
343 | EXPORT_SYMBOL(drm_addmap); |
344 | ||
c153f45f EA |
345 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
346 | struct drm_file *file_priv) | |
7ab98401 | 347 | { |
c153f45f | 348 | struct drm_map *map = data; |
55910517 | 349 | struct drm_map_list *maplist; |
7ab98401 DA |
350 | int err; |
351 | ||
7c1c2871 | 352 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
353 | return -EPERM; |
354 | ||
c153f45f EA |
355 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
356 | map->flags, &maplist); | |
7ab98401 | 357 | |
b5e89ed5 | 358 | if (err) |
7ab98401 | 359 | return err; |
d1f2b55a | 360 | |
67e1a014 | 361 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 362 | map->handle = (void *)(unsigned long)maplist->user_token; |
1da177e4 | 363 | return 0; |
88f399cd | 364 | } |
1da177e4 | 365 | |
1da177e4 LT |
366 | /** |
367 | * Remove a map private from list and deallocate resources if the mapping | |
368 | * isn't in use. | |
369 | * | |
370 | * \param inode device inode. | |
6c340eac | 371 | * \param file_priv DRM file private. |
1da177e4 | 372 | * \param cmd command. |
c60ce623 | 373 | * \param arg pointer to a struct drm_map structure. |
1da177e4 LT |
374 | * \return zero on success or a negative value on error. |
375 | * | |
376 | * Searches the map on drm_device::maplist, removes it from the list, see if | |
377 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
378 | * being on use. | |
379 | * | |
7ab98401 | 380 | * \sa drm_addmap |
1da177e4 | 381 | */ |
84b1fd10 | 382 | int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map) |
1da177e4 | 383 | { |
55910517 | 384 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 385 | drm_dma_handle_t dmah; |
bd1b331f | 386 | int found = 0; |
7c1c2871 | 387 | struct drm_master *master; |
1da177e4 | 388 | |
836cf046 | 389 | /* Find the list entry for the map and remove it */ |
bd1b331f | 390 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 391 | if (r_list->map == map) { |
7c1c2871 | 392 | master = r_list->master; |
bd1b331f | 393 | list_del(&r_list->head); |
1545085a TH |
394 | drm_ht_remove_key(&dev->map_hash, |
395 | r_list->user_token >> PAGE_SHIFT); | |
bd1b331f DA |
396 | drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS); |
397 | found = 1; | |
836cf046 DA |
398 | break; |
399 | } | |
1da177e4 LT |
400 | } |
401 | ||
bd1b331f | 402 | if (!found) |
1da177e4 | 403 | return -EINVAL; |
1da177e4 | 404 | |
836cf046 DA |
405 | switch (map->type) { |
406 | case _DRM_REGISTERS: | |
004a7727 | 407 | iounmap(map->handle); |
836cf046 DA |
408 | /* FALLTHROUGH */ |
409 | case _DRM_FRAME_BUFFER: | |
410 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
411 | int retcode; | |
b5e89ed5 DA |
412 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
413 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 414 | } |
836cf046 DA |
415 | break; |
416 | case _DRM_SHM: | |
417 | vfree(map->handle); | |
7c1c2871 DA |
418 | if (master) { |
419 | if (dev->sigdata.lock == master->lock.hw_lock) | |
420 | dev->sigdata.lock = NULL; | |
421 | master->lock.hw_lock = NULL; /* SHM removed */ | |
422 | master->lock.file_priv = NULL; | |
171901d1 | 423 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 424 | } |
836cf046 DA |
425 | break; |
426 | case _DRM_AGP: | |
427 | case _DRM_SCATTER_GATHER: | |
428 | break; | |
429 | case _DRM_CONSISTENT: | |
430 | dmah.vaddr = map->handle; | |
431 | dmah.busaddr = map->offset; | |
432 | dmah.size = map->size; | |
433 | __drm_pci_free(dev, &dmah); | |
434 | break; | |
a2c0a97b JB |
435 | case _DRM_GEM: |
436 | DRM_ERROR("tried to rmmap GEM object\n"); | |
437 | break; | |
1da177e4 | 438 | } |
836cf046 DA |
439 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
440 | ||
1da177e4 LT |
441 | return 0; |
442 | } | |
4e74f36d | 443 | EXPORT_SYMBOL(drm_rmmap_locked); |
836cf046 | 444 | |
84b1fd10 | 445 | int drm_rmmap(struct drm_device *dev, drm_local_map_t *map) |
836cf046 DA |
446 | { |
447 | int ret; | |
448 | ||
30e2fb18 | 449 | mutex_lock(&dev->struct_mutex); |
836cf046 | 450 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 451 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
452 | |
453 | return ret; | |
454 | } | |
ba8bbcf6 | 455 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 456 | |
836cf046 DA |
457 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
458 | * the last close of the device, and this is necessary for cleanup when things | |
459 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
460 | * like a pointless exercise since they're going away anyway. | |
461 | * | |
462 | * One use case might be after addmap is allowed for normal users for SHM and | |
463 | * gets used by drivers that the server doesn't need to care about. This seems | |
464 | * unlikely. | |
465 | */ | |
c153f45f EA |
466 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
467 | struct drm_file *file_priv) | |
7ab98401 | 468 | { |
c153f45f | 469 | struct drm_map *request = data; |
836cf046 | 470 | drm_local_map_t *map = NULL; |
55910517 | 471 | struct drm_map_list *r_list; |
836cf046 | 472 | int ret; |
7ab98401 | 473 | |
30e2fb18 | 474 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 475 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 476 | if (r_list->map && |
c153f45f | 477 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
478 | r_list->map->flags & _DRM_REMOVABLE) { |
479 | map = r_list->map; | |
480 | break; | |
481 | } | |
482 | } | |
483 | ||
484 | /* List has wrapped around to the head pointer, or its empty we didn't | |
485 | * find anything. | |
486 | */ | |
bd1b331f | 487 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 488 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
489 | return -EINVAL; |
490 | } | |
491 | ||
836cf046 DA |
492 | /* Register and framebuffer maps are permanent */ |
493 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 494 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
495 | return 0; |
496 | } | |
497 | ||
498 | ret = drm_rmmap_locked(dev, map); | |
499 | ||
30e2fb18 | 500 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
501 | |
502 | return ret; | |
7ab98401 | 503 | } |
1da177e4 LT |
504 | |
505 | /** | |
506 | * Cleanup after an error on one of the addbufs() functions. | |
507 | * | |
836cf046 | 508 | * \param dev DRM device. |
1da177e4 LT |
509 | * \param entry buffer entry where the error occurred. |
510 | * | |
511 | * Frees any pages and buffers associated with the given entry. | |
512 | */ | |
cdd55a29 DA |
513 | static void drm_cleanup_buf_error(struct drm_device * dev, |
514 | struct drm_buf_entry * entry) | |
1da177e4 LT |
515 | { |
516 | int i; | |
517 | ||
518 | if (entry->seg_count) { | |
519 | for (i = 0; i < entry->seg_count; i++) { | |
520 | if (entry->seglist[i]) { | |
ddf19b97 | 521 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
522 | } |
523 | } | |
524 | drm_free(entry->seglist, | |
b5e89ed5 DA |
525 | entry->seg_count * |
526 | sizeof(*entry->seglist), DRM_MEM_SEGS); | |
1da177e4 LT |
527 | |
528 | entry->seg_count = 0; | |
529 | } | |
530 | ||
b5e89ed5 DA |
531 | if (entry->buf_count) { |
532 | for (i = 0; i < entry->buf_count; i++) { | |
1da177e4 LT |
533 | if (entry->buflist[i].dev_private) { |
534 | drm_free(entry->buflist[i].dev_private, | |
b5e89ed5 DA |
535 | entry->buflist[i].dev_priv_size, |
536 | DRM_MEM_BUFS); | |
1da177e4 LT |
537 | } |
538 | } | |
539 | drm_free(entry->buflist, | |
b5e89ed5 DA |
540 | entry->buf_count * |
541 | sizeof(*entry->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
542 | |
543 | entry->buf_count = 0; | |
544 | } | |
545 | } | |
546 | ||
547 | #if __OS_HAS_AGP | |
548 | /** | |
d59431bf | 549 | * Add AGP buffers for DMA transfers. |
1da177e4 | 550 | * |
84b1fd10 | 551 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 552 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 553 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 554 | * |
1da177e4 LT |
555 | * After some sanity checks creates a drm_buf structure for each buffer and |
556 | * reallocates the buffer list of the same size order to accommodate the new | |
557 | * buffers. | |
558 | */ | |
84b1fd10 | 559 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 560 | { |
cdd55a29 DA |
561 | struct drm_device_dma *dma = dev->dma; |
562 | struct drm_buf_entry *entry; | |
55910517 | 563 | struct drm_agp_mem *agp_entry; |
056219e2 | 564 | struct drm_buf *buf; |
1da177e4 LT |
565 | unsigned long offset; |
566 | unsigned long agp_offset; | |
567 | int count; | |
568 | int order; | |
569 | int size; | |
570 | int alignment; | |
571 | int page_order; | |
572 | int total; | |
573 | int byte_count; | |
54ba2f76 | 574 | int i, valid; |
056219e2 | 575 | struct drm_buf **temp_buflist; |
1da177e4 | 576 | |
b5e89ed5 DA |
577 | if (!dma) |
578 | return -EINVAL; | |
1da177e4 | 579 | |
d59431bf DA |
580 | count = request->count; |
581 | order = drm_order(request->size); | |
1da177e4 LT |
582 | size = 1 << order; |
583 | ||
b5e89ed5 DA |
584 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
585 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
586 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
587 | total = PAGE_SIZE << page_order; | |
588 | ||
589 | byte_count = 0; | |
d59431bf | 590 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 591 | |
b5e89ed5 DA |
592 | DRM_DEBUG("count: %d\n", count); |
593 | DRM_DEBUG("order: %d\n", order); | |
594 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 595 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
596 | DRM_DEBUG("alignment: %d\n", alignment); |
597 | DRM_DEBUG("page_order: %d\n", page_order); | |
598 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 599 | |
b5e89ed5 DA |
600 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
601 | return -EINVAL; | |
602 | if (dev->queue_count) | |
603 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 604 | |
54ba2f76 DA |
605 | /* Make sure buffers are located in AGP memory that we own */ |
606 | valid = 0; | |
bd1b331f | 607 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
608 | if ((agp_offset >= agp_entry->bound) && |
609 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
610 | valid = 1; | |
611 | break; | |
612 | } | |
613 | } | |
bd1b331f | 614 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
615 | DRM_DEBUG("zone invalid\n"); |
616 | return -EINVAL; | |
617 | } | |
b5e89ed5 DA |
618 | spin_lock(&dev->count_lock); |
619 | if (dev->buf_use) { | |
620 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
621 | return -EBUSY; |
622 | } | |
b5e89ed5 DA |
623 | atomic_inc(&dev->buf_alloc); |
624 | spin_unlock(&dev->count_lock); | |
1da177e4 | 625 | |
30e2fb18 | 626 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 627 | entry = &dma->bufs[order]; |
b5e89ed5 | 628 | if (entry->buf_count) { |
30e2fb18 | 629 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
630 | atomic_dec(&dev->buf_alloc); |
631 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
632 | } |
633 | ||
634 | if (count < 0 || count > 4096) { | |
30e2fb18 | 635 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 636 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
637 | return -EINVAL; |
638 | } | |
639 | ||
b5e89ed5 DA |
640 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
641 | DRM_MEM_BUFS); | |
642 | if (!entry->buflist) { | |
30e2fb18 | 643 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 644 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
645 | return -ENOMEM; |
646 | } | |
b5e89ed5 | 647 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
648 | |
649 | entry->buf_size = size; | |
650 | entry->page_order = page_order; | |
651 | ||
652 | offset = 0; | |
653 | ||
b5e89ed5 DA |
654 | while (entry->buf_count < count) { |
655 | buf = &entry->buflist[entry->buf_count]; | |
656 | buf->idx = dma->buf_count + entry->buf_count; | |
657 | buf->total = alignment; | |
658 | buf->order = order; | |
659 | buf->used = 0; | |
1da177e4 | 660 | |
b5e89ed5 | 661 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
662 | buf->bus_address = agp_offset + offset; |
663 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 664 | buf->next = NULL; |
1da177e4 LT |
665 | buf->waiting = 0; |
666 | buf->pending = 0; | |
b5e89ed5 | 667 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 668 | buf->file_priv = NULL; |
1da177e4 LT |
669 | |
670 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
671 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
672 | if (!buf->dev_private) { | |
1da177e4 LT |
673 | /* Set count correctly so we free the proper amount. */ |
674 | entry->buf_count = count; | |
b5e89ed5 | 675 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 676 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 677 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
678 | return -ENOMEM; |
679 | } | |
b5e89ed5 | 680 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 681 | |
b5e89ed5 | 682 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
683 | |
684 | offset += alignment; | |
685 | entry->buf_count++; | |
686 | byte_count += PAGE_SIZE << page_order; | |
687 | } | |
688 | ||
b5e89ed5 | 689 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 690 | |
b5e89ed5 DA |
691 | temp_buflist = drm_realloc(dma->buflist, |
692 | dma->buf_count * sizeof(*dma->buflist), | |
693 | (dma->buf_count + entry->buf_count) | |
694 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
695 | if (!temp_buflist) { | |
1da177e4 | 696 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 697 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 698 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 699 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
700 | return -ENOMEM; |
701 | } | |
702 | dma->buflist = temp_buflist; | |
703 | ||
b5e89ed5 | 704 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
705 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
706 | } | |
707 | ||
708 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
709 | dma->seg_count += entry->seg_count; |
710 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
711 | dma->byte_count += byte_count; |
712 | ||
b5e89ed5 DA |
713 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
714 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 715 | |
30e2fb18 | 716 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 717 | |
d59431bf DA |
718 | request->count = entry->buf_count; |
719 | request->size = size; | |
1da177e4 LT |
720 | |
721 | dma->flags = _DRM_DMA_USE_AGP; | |
722 | ||
b5e89ed5 | 723 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
724 | return 0; |
725 | } | |
d84f76d3 | 726 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 727 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 728 | |
84b1fd10 | 729 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 730 | { |
cdd55a29 | 731 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
732 | int count; |
733 | int order; | |
734 | int size; | |
735 | int total; | |
736 | int page_order; | |
cdd55a29 | 737 | struct drm_buf_entry *entry; |
ddf19b97 | 738 | drm_dma_handle_t *dmah; |
056219e2 | 739 | struct drm_buf *buf; |
1da177e4 LT |
740 | int alignment; |
741 | unsigned long offset; | |
742 | int i; | |
743 | int byte_count; | |
744 | int page_count; | |
745 | unsigned long *temp_pagelist; | |
056219e2 | 746 | struct drm_buf **temp_buflist; |
1da177e4 | 747 | |
b5e89ed5 DA |
748 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
749 | return -EINVAL; | |
d985c108 | 750 | |
b5e89ed5 DA |
751 | if (!dma) |
752 | return -EINVAL; | |
1da177e4 | 753 | |
d985c108 DA |
754 | if (!capable(CAP_SYS_ADMIN)) |
755 | return -EPERM; | |
756 | ||
d59431bf DA |
757 | count = request->count; |
758 | order = drm_order(request->size); | |
1da177e4 LT |
759 | size = 1 << order; |
760 | ||
b5e89ed5 DA |
761 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
762 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 763 | |
b5e89ed5 DA |
764 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
765 | return -EINVAL; | |
766 | if (dev->queue_count) | |
767 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 768 | |
d59431bf | 769 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 770 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
771 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
772 | total = PAGE_SIZE << page_order; | |
773 | ||
b5e89ed5 DA |
774 | spin_lock(&dev->count_lock); |
775 | if (dev->buf_use) { | |
776 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
777 | return -EBUSY; |
778 | } | |
b5e89ed5 DA |
779 | atomic_inc(&dev->buf_alloc); |
780 | spin_unlock(&dev->count_lock); | |
1da177e4 | 781 | |
30e2fb18 | 782 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 783 | entry = &dma->bufs[order]; |
b5e89ed5 | 784 | if (entry->buf_count) { |
30e2fb18 | 785 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 786 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
787 | return -ENOMEM; /* May only call once for each order */ |
788 | } | |
789 | ||
790 | if (count < 0 || count > 4096) { | |
30e2fb18 | 791 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 792 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
793 | return -EINVAL; |
794 | } | |
795 | ||
b5e89ed5 DA |
796 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
797 | DRM_MEM_BUFS); | |
798 | if (!entry->buflist) { | |
30e2fb18 | 799 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 800 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
801 | return -ENOMEM; |
802 | } | |
b5e89ed5 DA |
803 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
804 | ||
805 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), | |
806 | DRM_MEM_SEGS); | |
807 | if (!entry->seglist) { | |
808 | drm_free(entry->buflist, | |
809 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
30e2fb18 | 810 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 811 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
812 | return -ENOMEM; |
813 | } | |
b5e89ed5 | 814 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
815 | |
816 | /* Keep the original pagelist until we know all the allocations | |
817 | * have succeeded | |
818 | */ | |
b5e89ed5 DA |
819 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
820 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
1da177e4 | 821 | if (!temp_pagelist) { |
b5e89ed5 DA |
822 | drm_free(entry->buflist, |
823 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
824 | drm_free(entry->seglist, | |
825 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); | |
30e2fb18 | 826 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 827 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
828 | return -ENOMEM; |
829 | } | |
830 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
831 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
832 | DRM_DEBUG("pagelist: %d entries\n", | |
833 | dma->page_count + (count << page_order)); | |
1da177e4 | 834 | |
b5e89ed5 | 835 | entry->buf_size = size; |
1da177e4 LT |
836 | entry->page_order = page_order; |
837 | byte_count = 0; | |
838 | page_count = 0; | |
839 | ||
b5e89ed5 | 840 | while (entry->buf_count < count) { |
bc5f4523 | 841 | |
ddf19b97 | 842 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); |
bc5f4523 | 843 | |
ddf19b97 | 844 | if (!dmah) { |
1da177e4 LT |
845 | /* Set count correctly so we free the proper amount. */ |
846 | entry->buf_count = count; | |
847 | entry->seg_count = count; | |
848 | drm_cleanup_buf_error(dev, entry); | |
b5e89ed5 DA |
849 | drm_free(temp_pagelist, |
850 | (dma->page_count + (count << page_order)) | |
851 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 852 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 853 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
854 | return -ENOMEM; |
855 | } | |
ddf19b97 | 856 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
857 | for (i = 0; i < (1 << page_order); i++) { |
858 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
859 | dma->page_count + page_count, | |
ddf19b97 | 860 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 861 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 862 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 863 | } |
b5e89ed5 DA |
864 | for (offset = 0; |
865 | offset + size <= total && entry->buf_count < count; | |
866 | offset += alignment, ++entry->buf_count) { | |
867 | buf = &entry->buflist[entry->buf_count]; | |
868 | buf->idx = dma->buf_count + entry->buf_count; | |
869 | buf->total = alignment; | |
870 | buf->order = order; | |
871 | buf->used = 0; | |
872 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
873 | buf->address = (void *)(dmah->vaddr + offset); |
874 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 875 | buf->next = NULL; |
1da177e4 LT |
876 | buf->waiting = 0; |
877 | buf->pending = 0; | |
b5e89ed5 | 878 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 879 | buf->file_priv = NULL; |
1da177e4 LT |
880 | |
881 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
882 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
883 | DRM_MEM_BUFS); | |
884 | if (!buf->dev_private) { | |
1da177e4 LT |
885 | /* Set count correctly so we free the proper amount. */ |
886 | entry->buf_count = count; | |
887 | entry->seg_count = count; | |
b5e89ed5 DA |
888 | drm_cleanup_buf_error(dev, entry); |
889 | drm_free(temp_pagelist, | |
890 | (dma->page_count + | |
891 | (count << page_order)) | |
892 | * sizeof(*dma->pagelist), | |
893 | DRM_MEM_PAGES); | |
30e2fb18 | 894 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 895 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
896 | return -ENOMEM; |
897 | } | |
b5e89ed5 | 898 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 899 | |
b5e89ed5 DA |
900 | DRM_DEBUG("buffer %d @ %p\n", |
901 | entry->buf_count, buf->address); | |
1da177e4 LT |
902 | } |
903 | byte_count += PAGE_SIZE << page_order; | |
904 | } | |
905 | ||
b5e89ed5 DA |
906 | temp_buflist = drm_realloc(dma->buflist, |
907 | dma->buf_count * sizeof(*dma->buflist), | |
908 | (dma->buf_count + entry->buf_count) | |
909 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
910 | if (!temp_buflist) { |
911 | /* Free the entry because it isn't valid */ | |
b5e89ed5 DA |
912 | drm_cleanup_buf_error(dev, entry); |
913 | drm_free(temp_pagelist, | |
914 | (dma->page_count + (count << page_order)) | |
915 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 916 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 917 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
918 | return -ENOMEM; |
919 | } | |
920 | dma->buflist = temp_buflist; | |
921 | ||
b5e89ed5 | 922 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
923 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
924 | } | |
925 | ||
926 | /* No allocations failed, so now we can replace the orginal pagelist | |
927 | * with the new one. | |
928 | */ | |
929 | if (dma->page_count) { | |
930 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
931 | dma->page_count * sizeof(*dma->pagelist), |
932 | DRM_MEM_PAGES); | |
1da177e4 LT |
933 | } |
934 | dma->pagelist = temp_pagelist; | |
935 | ||
936 | dma->buf_count += entry->buf_count; | |
937 | dma->seg_count += entry->seg_count; | |
938 | dma->page_count += entry->seg_count << page_order; | |
939 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
940 | ||
30e2fb18 | 941 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 942 | |
d59431bf DA |
943 | request->count = entry->buf_count; |
944 | request->size = size; | |
1da177e4 | 945 | |
3417f33e GS |
946 | if (request->flags & _DRM_PCI_BUFFER_RO) |
947 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
948 | ||
b5e89ed5 | 949 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
950 | return 0; |
951 | ||
952 | } | |
d84f76d3 | 953 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 954 | |
84b1fd10 | 955 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 956 | { |
cdd55a29 DA |
957 | struct drm_device_dma *dma = dev->dma; |
958 | struct drm_buf_entry *entry; | |
056219e2 | 959 | struct drm_buf *buf; |
1da177e4 LT |
960 | unsigned long offset; |
961 | unsigned long agp_offset; | |
962 | int count; | |
963 | int order; | |
964 | int size; | |
965 | int alignment; | |
966 | int page_order; | |
967 | int total; | |
968 | int byte_count; | |
969 | int i; | |
056219e2 | 970 | struct drm_buf **temp_buflist; |
1da177e4 | 971 | |
b5e89ed5 DA |
972 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
973 | return -EINVAL; | |
974 | ||
975 | if (!dma) | |
976 | return -EINVAL; | |
1da177e4 | 977 | |
d985c108 DA |
978 | if (!capable(CAP_SYS_ADMIN)) |
979 | return -EPERM; | |
980 | ||
d59431bf DA |
981 | count = request->count; |
982 | order = drm_order(request->size); | |
1da177e4 LT |
983 | size = 1 << order; |
984 | ||
b5e89ed5 DA |
985 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
986 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
987 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
988 | total = PAGE_SIZE << page_order; | |
989 | ||
990 | byte_count = 0; | |
d59431bf | 991 | agp_offset = request->agp_start; |
1da177e4 | 992 | |
b5e89ed5 DA |
993 | DRM_DEBUG("count: %d\n", count); |
994 | DRM_DEBUG("order: %d\n", order); | |
995 | DRM_DEBUG("size: %d\n", size); | |
996 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
997 | DRM_DEBUG("alignment: %d\n", alignment); | |
998 | DRM_DEBUG("page_order: %d\n", page_order); | |
999 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1000 | |
b5e89ed5 DA |
1001 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1002 | return -EINVAL; | |
1003 | if (dev->queue_count) | |
1004 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1005 | |
b5e89ed5 DA |
1006 | spin_lock(&dev->count_lock); |
1007 | if (dev->buf_use) { | |
1008 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1009 | return -EBUSY; |
1010 | } | |
b5e89ed5 DA |
1011 | atomic_inc(&dev->buf_alloc); |
1012 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1013 | |
30e2fb18 | 1014 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1015 | entry = &dma->bufs[order]; |
b5e89ed5 | 1016 | if (entry->buf_count) { |
30e2fb18 | 1017 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1018 | atomic_dec(&dev->buf_alloc); |
1019 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1020 | } |
1021 | ||
1022 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1023 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1024 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1025 | return -EINVAL; |
1026 | } | |
1027 | ||
b5e89ed5 DA |
1028 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
1029 | DRM_MEM_BUFS); | |
1030 | if (!entry->buflist) { | |
30e2fb18 | 1031 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1032 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1033 | return -ENOMEM; |
1034 | } | |
b5e89ed5 | 1035 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
1036 | |
1037 | entry->buf_size = size; | |
1038 | entry->page_order = page_order; | |
1039 | ||
1040 | offset = 0; | |
1041 | ||
b5e89ed5 DA |
1042 | while (entry->buf_count < count) { |
1043 | buf = &entry->buflist[entry->buf_count]; | |
1044 | buf->idx = dma->buf_count + entry->buf_count; | |
1045 | buf->total = alignment; | |
1046 | buf->order = order; | |
1047 | buf->used = 0; | |
1da177e4 | 1048 | |
b5e89ed5 | 1049 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1050 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1051 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1052 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1053 | buf->next = NULL; |
1da177e4 LT |
1054 | buf->waiting = 0; |
1055 | buf->pending = 0; | |
b5e89ed5 | 1056 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 1057 | buf->file_priv = NULL; |
1da177e4 LT |
1058 | |
1059 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
1060 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
1061 | if (!buf->dev_private) { | |
1da177e4 LT |
1062 | /* Set count correctly so we free the proper amount. */ |
1063 | entry->buf_count = count; | |
b5e89ed5 | 1064 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1065 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1066 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1067 | return -ENOMEM; |
1068 | } | |
1069 | ||
b5e89ed5 | 1070 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1071 | |
b5e89ed5 | 1072 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1073 | |
1074 | offset += alignment; | |
1075 | entry->buf_count++; | |
1076 | byte_count += PAGE_SIZE << page_order; | |
1077 | } | |
1078 | ||
b5e89ed5 | 1079 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1080 | |
b5e89ed5 DA |
1081 | temp_buflist = drm_realloc(dma->buflist, |
1082 | dma->buf_count * sizeof(*dma->buflist), | |
1083 | (dma->buf_count + entry->buf_count) | |
1084 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1085 | if (!temp_buflist) { | |
1da177e4 | 1086 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1087 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1088 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1089 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1090 | return -ENOMEM; |
1091 | } | |
1092 | dma->buflist = temp_buflist; | |
1093 | ||
b5e89ed5 | 1094 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1095 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1096 | } | |
1097 | ||
1098 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1099 | dma->seg_count += entry->seg_count; |
1100 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1101 | dma->byte_count += byte_count; |
1102 | ||
b5e89ed5 DA |
1103 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1104 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1105 | |
30e2fb18 | 1106 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1107 | |
d59431bf DA |
1108 | request->count = entry->buf_count; |
1109 | request->size = size; | |
1da177e4 LT |
1110 | |
1111 | dma->flags = _DRM_DMA_USE_SG; | |
1112 | ||
b5e89ed5 | 1113 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1114 | return 0; |
1115 | } | |
1116 | ||
84b1fd10 | 1117 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1118 | { |
cdd55a29 DA |
1119 | struct drm_device_dma *dma = dev->dma; |
1120 | struct drm_buf_entry *entry; | |
056219e2 | 1121 | struct drm_buf *buf; |
b84397d6 DA |
1122 | unsigned long offset; |
1123 | unsigned long agp_offset; | |
1124 | int count; | |
1125 | int order; | |
1126 | int size; | |
1127 | int alignment; | |
1128 | int page_order; | |
1129 | int total; | |
1130 | int byte_count; | |
1131 | int i; | |
056219e2 | 1132 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1133 | |
1134 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1135 | return -EINVAL; | |
b5e89ed5 | 1136 | |
b84397d6 DA |
1137 | if (!dma) |
1138 | return -EINVAL; | |
1139 | ||
d985c108 DA |
1140 | if (!capable(CAP_SYS_ADMIN)) |
1141 | return -EPERM; | |
1142 | ||
d59431bf DA |
1143 | count = request->count; |
1144 | order = drm_order(request->size); | |
b84397d6 DA |
1145 | size = 1 << order; |
1146 | ||
d59431bf | 1147 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1148 | ? PAGE_ALIGN(size) : size; |
1149 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1150 | total = PAGE_SIZE << page_order; | |
1151 | ||
1152 | byte_count = 0; | |
d59431bf | 1153 | agp_offset = request->agp_start; |
b84397d6 DA |
1154 | |
1155 | DRM_DEBUG("count: %d\n", count); | |
1156 | DRM_DEBUG("order: %d\n", order); | |
1157 | DRM_DEBUG("size: %d\n", size); | |
1158 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1159 | DRM_DEBUG("alignment: %d\n", alignment); | |
1160 | DRM_DEBUG("page_order: %d\n", page_order); | |
1161 | DRM_DEBUG("total: %d\n", total); | |
1162 | ||
1163 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1164 | return -EINVAL; | |
1165 | if (dev->queue_count) | |
1166 | return -EBUSY; /* Not while in use */ | |
1167 | ||
1168 | spin_lock(&dev->count_lock); | |
1169 | if (dev->buf_use) { | |
1170 | spin_unlock(&dev->count_lock); | |
1171 | return -EBUSY; | |
1172 | } | |
1173 | atomic_inc(&dev->buf_alloc); | |
1174 | spin_unlock(&dev->count_lock); | |
1175 | ||
30e2fb18 | 1176 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1177 | entry = &dma->bufs[order]; |
1178 | if (entry->buf_count) { | |
30e2fb18 | 1179 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1180 | atomic_dec(&dev->buf_alloc); |
1181 | return -ENOMEM; /* May only call once for each order */ | |
1182 | } | |
1183 | ||
1184 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1185 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1186 | atomic_dec(&dev->buf_alloc); |
1187 | return -EINVAL; | |
1188 | } | |
1189 | ||
1190 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), | |
1191 | DRM_MEM_BUFS); | |
1192 | if (!entry->buflist) { | |
30e2fb18 | 1193 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1194 | atomic_dec(&dev->buf_alloc); |
1195 | return -ENOMEM; | |
1196 | } | |
1197 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1198 | ||
1199 | entry->buf_size = size; | |
1200 | entry->page_order = page_order; | |
1201 | ||
1202 | offset = 0; | |
1203 | ||
1204 | while (entry->buf_count < count) { | |
1205 | buf = &entry->buflist[entry->buf_count]; | |
1206 | buf->idx = dma->buf_count + entry->buf_count; | |
1207 | buf->total = alignment; | |
1208 | buf->order = order; | |
1209 | buf->used = 0; | |
1210 | ||
1211 | buf->offset = (dma->byte_count + offset); | |
1212 | buf->bus_address = agp_offset + offset; | |
1213 | buf->address = (void *)(agp_offset + offset); | |
1214 | buf->next = NULL; | |
1215 | buf->waiting = 0; | |
1216 | buf->pending = 0; | |
1217 | init_waitqueue_head(&buf->dma_wait); | |
6c340eac | 1218 | buf->file_priv = NULL; |
b84397d6 DA |
1219 | |
1220 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
1221 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); | |
1222 | if (!buf->dev_private) { | |
1223 | /* Set count correctly so we free the proper amount. */ | |
1224 | entry->buf_count = count; | |
1225 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1226 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1227 | atomic_dec(&dev->buf_alloc); |
1228 | return -ENOMEM; | |
1229 | } | |
1230 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1231 | ||
1232 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1233 | ||
1234 | offset += alignment; | |
1235 | entry->buf_count++; | |
1236 | byte_count += PAGE_SIZE << page_order; | |
1237 | } | |
1238 | ||
1239 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1240 | ||
1241 | temp_buflist = drm_realloc(dma->buflist, | |
1242 | dma->buf_count * sizeof(*dma->buflist), | |
1243 | (dma->buf_count + entry->buf_count) | |
1244 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1245 | if (!temp_buflist) { | |
1246 | /* Free the entry because it isn't valid */ | |
1247 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1248 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1249 | atomic_dec(&dev->buf_alloc); |
1250 | return -ENOMEM; | |
1251 | } | |
1252 | dma->buflist = temp_buflist; | |
1253 | ||
1254 | for (i = 0; i < entry->buf_count; i++) { | |
1255 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1256 | } | |
1257 | ||
1258 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1259 | dma->seg_count += entry->seg_count; |
1260 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1261 | dma->byte_count += byte_count; |
1262 | ||
1263 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1264 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1265 | ||
30e2fb18 | 1266 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1267 | |
d59431bf DA |
1268 | request->count = entry->buf_count; |
1269 | request->size = size; | |
b84397d6 DA |
1270 | |
1271 | dma->flags = _DRM_DMA_USE_FB; | |
1272 | ||
1273 | atomic_dec(&dev->buf_alloc); | |
1274 | return 0; | |
1275 | } | |
d985c108 | 1276 | |
b84397d6 | 1277 | |
1da177e4 LT |
1278 | /** |
1279 | * Add buffers for DMA transfers (ioctl). | |
1280 | * | |
1281 | * \param inode device inode. | |
6c340eac | 1282 | * \param file_priv DRM file private. |
1da177e4 | 1283 | * \param cmd command. |
c60ce623 | 1284 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1285 | * \return zero on success or a negative number on failure. |
1286 | * | |
1287 | * According with the memory type specified in drm_buf_desc::flags and the | |
1288 | * build options, it dispatches the call either to addbufs_agp(), | |
1289 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1290 | * PCI memory respectively. | |
1291 | */ | |
c153f45f EA |
1292 | int drm_addbufs(struct drm_device *dev, void *data, |
1293 | struct drm_file *file_priv) | |
1da177e4 | 1294 | { |
c153f45f | 1295 | struct drm_buf_desc *request = data; |
d59431bf | 1296 | int ret; |
b5e89ed5 | 1297 | |
1da177e4 LT |
1298 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1299 | return -EINVAL; | |
1300 | ||
1da177e4 | 1301 | #if __OS_HAS_AGP |
c153f45f EA |
1302 | if (request->flags & _DRM_AGP_BUFFER) |
1303 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1304 | else |
1305 | #endif | |
c153f45f EA |
1306 | if (request->flags & _DRM_SG_BUFFER) |
1307 | ret = drm_addbufs_sg(dev, request); | |
1308 | else if (request->flags & _DRM_FB_BUFFER) | |
1309 | ret = drm_addbufs_fb(dev, request); | |
1da177e4 | 1310 | else |
c153f45f | 1311 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1312 | |
d59431bf | 1313 | return ret; |
1da177e4 LT |
1314 | } |
1315 | ||
1da177e4 LT |
1316 | /** |
1317 | * Get information about the buffer mappings. | |
1318 | * | |
1319 | * This was originally mean for debugging purposes, or by a sophisticated | |
1320 | * client library to determine how best to use the available buffers (e.g., | |
1321 | * large buffers can be used for image transfer). | |
1322 | * | |
1323 | * \param inode device inode. | |
6c340eac | 1324 | * \param file_priv DRM file private. |
1da177e4 LT |
1325 | * \param cmd command. |
1326 | * \param arg pointer to a drm_buf_info structure. | |
1327 | * \return zero on success or a negative number on failure. | |
1328 | * | |
1329 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1330 | * lock, preventing of allocating more buffers after this call. Information | |
1331 | * about each requested buffer is then copied into user space. | |
1332 | */ | |
c153f45f EA |
1333 | int drm_infobufs(struct drm_device *dev, void *data, |
1334 | struct drm_file *file_priv) | |
1da177e4 | 1335 | { |
cdd55a29 | 1336 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1337 | struct drm_buf_info *request = data; |
1da177e4 LT |
1338 | int i; |
1339 | int count; | |
1340 | ||
1341 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1342 | return -EINVAL; | |
1343 | ||
b5e89ed5 DA |
1344 | if (!dma) |
1345 | return -EINVAL; | |
1da177e4 | 1346 | |
b5e89ed5 DA |
1347 | spin_lock(&dev->count_lock); |
1348 | if (atomic_read(&dev->buf_alloc)) { | |
1349 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1350 | return -EBUSY; |
1351 | } | |
1352 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1353 | spin_unlock(&dev->count_lock); |
1da177e4 | 1354 | |
b5e89ed5 DA |
1355 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1356 | if (dma->bufs[i].buf_count) | |
1357 | ++count; | |
1da177e4 LT |
1358 | } |
1359 | ||
b5e89ed5 | 1360 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1361 | |
c153f45f | 1362 | if (request->count >= count) { |
b5e89ed5 DA |
1363 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1364 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1365 | struct drm_buf_desc __user *to = |
c153f45f | 1366 | &request->list[count]; |
cdd55a29 DA |
1367 | struct drm_buf_entry *from = &dma->bufs[i]; |
1368 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1369 | if (copy_to_user(&to->count, |
1370 | &from->buf_count, | |
1371 | sizeof(from->buf_count)) || | |
1372 | copy_to_user(&to->size, | |
1373 | &from->buf_size, | |
1374 | sizeof(from->buf_size)) || | |
1375 | copy_to_user(&to->low_mark, | |
1376 | &list->low_mark, | |
1377 | sizeof(list->low_mark)) || | |
1378 | copy_to_user(&to->high_mark, | |
1379 | &list->high_mark, | |
1380 | sizeof(list->high_mark))) | |
1da177e4 LT |
1381 | return -EFAULT; |
1382 | ||
b5e89ed5 DA |
1383 | DRM_DEBUG("%d %d %d %d %d\n", |
1384 | i, | |
1385 | dma->bufs[i].buf_count, | |
1386 | dma->bufs[i].buf_size, | |
1387 | dma->bufs[i].freelist.low_mark, | |
1388 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1389 | ++count; |
1390 | } | |
1391 | } | |
1392 | } | |
c153f45f | 1393 | request->count = count; |
1da177e4 LT |
1394 | |
1395 | return 0; | |
1396 | } | |
1397 | ||
1398 | /** | |
1399 | * Specifies a low and high water mark for buffer allocation | |
1400 | * | |
1401 | * \param inode device inode. | |
6c340eac | 1402 | * \param file_priv DRM file private. |
1da177e4 LT |
1403 | * \param cmd command. |
1404 | * \param arg a pointer to a drm_buf_desc structure. | |
1405 | * \return zero on success or a negative number on failure. | |
1406 | * | |
1407 | * Verifies that the size order is bounded between the admissible orders and | |
1408 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1409 | * | |
1410 | * \note This ioctl is deprecated and mostly never used. | |
1411 | */ | |
c153f45f EA |
1412 | int drm_markbufs(struct drm_device *dev, void *data, |
1413 | struct drm_file *file_priv) | |
1da177e4 | 1414 | { |
cdd55a29 | 1415 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1416 | struct drm_buf_desc *request = data; |
1da177e4 | 1417 | int order; |
cdd55a29 | 1418 | struct drm_buf_entry *entry; |
1da177e4 LT |
1419 | |
1420 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1421 | return -EINVAL; | |
1422 | ||
b5e89ed5 DA |
1423 | if (!dma) |
1424 | return -EINVAL; | |
1da177e4 | 1425 | |
b5e89ed5 | 1426 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f EA |
1427 | request->size, request->low_mark, request->high_mark); |
1428 | order = drm_order(request->size); | |
b5e89ed5 DA |
1429 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1430 | return -EINVAL; | |
1da177e4 LT |
1431 | entry = &dma->bufs[order]; |
1432 | ||
c153f45f | 1433 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1434 | return -EINVAL; |
c153f45f | 1435 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1436 | return -EINVAL; |
1437 | ||
c153f45f EA |
1438 | entry->freelist.low_mark = request->low_mark; |
1439 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1440 | |
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | /** | |
b5e89ed5 | 1445 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1446 | * |
1447 | * \param inode device inode. | |
6c340eac | 1448 | * \param file_priv DRM file private. |
1da177e4 LT |
1449 | * \param cmd command. |
1450 | * \param arg pointer to a drm_buf_free structure. | |
1451 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1452 | * |
1da177e4 LT |
1453 | * Calls free_buffer() for each used buffer. |
1454 | * This function is primarily used for debugging. | |
1455 | */ | |
c153f45f EA |
1456 | int drm_freebufs(struct drm_device *dev, void *data, |
1457 | struct drm_file *file_priv) | |
1da177e4 | 1458 | { |
cdd55a29 | 1459 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1460 | struct drm_buf_free *request = data; |
1da177e4 LT |
1461 | int i; |
1462 | int idx; | |
056219e2 | 1463 | struct drm_buf *buf; |
1da177e4 LT |
1464 | |
1465 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1466 | return -EINVAL; | |
1467 | ||
b5e89ed5 DA |
1468 | if (!dma) |
1469 | return -EINVAL; | |
1da177e4 | 1470 | |
c153f45f EA |
1471 | DRM_DEBUG("%d\n", request->count); |
1472 | for (i = 0; i < request->count; i++) { | |
1473 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1474 | return -EFAULT; |
b5e89ed5 DA |
1475 | if (idx < 0 || idx >= dma->buf_count) { |
1476 | DRM_ERROR("Index %d (of %d max)\n", | |
1477 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1478 | return -EINVAL; |
1479 | } | |
1480 | buf = dma->buflist[idx]; | |
6c340eac | 1481 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1482 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1483 | task_pid_nr(current)); |
1da177e4 LT |
1484 | return -EINVAL; |
1485 | } | |
b5e89ed5 | 1486 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1487 | } |
1488 | ||
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | /** | |
1493 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1494 | * | |
1495 | * \param inode device inode. | |
6c340eac | 1496 | * \param file_priv DRM file private. |
1da177e4 LT |
1497 | * \param cmd command. |
1498 | * \param arg pointer to a drm_buf_map structure. | |
1499 | * \return zero on success or a negative number on failure. | |
1500 | * | |
3417f33e GS |
1501 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1502 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1503 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1504 | * drm_mmap_dma(). | |
1da177e4 | 1505 | */ |
c153f45f EA |
1506 | int drm_mapbufs(struct drm_device *dev, void *data, |
1507 | struct drm_file *file_priv) | |
1da177e4 | 1508 | { |
cdd55a29 | 1509 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1510 | int retcode = 0; |
1511 | const int zero = 0; | |
1512 | unsigned long virtual; | |
1513 | unsigned long address; | |
c153f45f | 1514 | struct drm_buf_map *request = data; |
1da177e4 LT |
1515 | int i; |
1516 | ||
1517 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1518 | return -EINVAL; | |
1519 | ||
b5e89ed5 DA |
1520 | if (!dma) |
1521 | return -EINVAL; | |
1da177e4 | 1522 | |
b5e89ed5 DA |
1523 | spin_lock(&dev->count_lock); |
1524 | if (atomic_read(&dev->buf_alloc)) { | |
1525 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1526 | return -EBUSY; |
1527 | } | |
1528 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1529 | spin_unlock(&dev->count_lock); |
1da177e4 | 1530 | |
c153f45f | 1531 | if (request->count >= dma->buf_count) { |
b84397d6 | 1532 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1533 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1534 | && (dma->flags & _DRM_DMA_USE_SG)) |
1535 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1536 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
c60ce623 | 1537 | struct drm_map *map = dev->agp_buffer_map; |
d1f2b55a | 1538 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1539 | |
b5e89ed5 | 1540 | if (!map) { |
1da177e4 LT |
1541 | retcode = -EINVAL; |
1542 | goto done; | |
1543 | } | |
b5e89ed5 | 1544 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1545 | virtual = do_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1546 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1547 | MAP_SHARED, |
1548 | token); | |
b5e89ed5 | 1549 | up_write(¤t->mm->mmap_sem); |
1da177e4 | 1550 | } else { |
b5e89ed5 | 1551 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1552 | virtual = do_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1553 | PROT_READ | PROT_WRITE, |
1554 | MAP_SHARED, 0); | |
1555 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1556 | } |
b5e89ed5 | 1557 | if (virtual > -1024UL) { |
1da177e4 LT |
1558 | /* Real error */ |
1559 | retcode = (signed long)virtual; | |
1560 | goto done; | |
1561 | } | |
c153f45f | 1562 | request->virtual = (void __user *)virtual; |
1da177e4 | 1563 | |
b5e89ed5 | 1564 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1565 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1566 | &dma->buflist[i]->idx, |
c153f45f | 1567 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1568 | retcode = -EFAULT; |
1569 | goto done; | |
1570 | } | |
c153f45f | 1571 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1572 | &dma->buflist[i]->total, |
c153f45f | 1573 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1574 | retcode = -EFAULT; |
1575 | goto done; | |
1576 | } | |
c153f45f | 1577 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1578 | &zero, sizeof(zero))) { |
1da177e4 LT |
1579 | retcode = -EFAULT; |
1580 | goto done; | |
1581 | } | |
b5e89ed5 | 1582 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1583 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1584 | &address, sizeof(address))) { |
1da177e4 LT |
1585 | retcode = -EFAULT; |
1586 | goto done; | |
1587 | } | |
1588 | } | |
1589 | } | |
b5e89ed5 | 1590 | done: |
c153f45f EA |
1591 | request->count = dma->buf_count; |
1592 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1593 | |
1594 | return retcode; | |
1595 | } | |
1596 | ||
836cf046 DA |
1597 | /** |
1598 | * Compute size order. Returns the exponent of the smaller power of two which | |
1599 | * is greater or equal to given number. | |
b5e89ed5 | 1600 | * |
836cf046 DA |
1601 | * \param size size. |
1602 | * \return order. | |
1603 | * | |
1604 | * \todo Can be made faster. | |
1605 | */ | |
b5e89ed5 | 1606 | int drm_order(unsigned long size) |
836cf046 DA |
1607 | { |
1608 | int order; | |
1609 | unsigned long tmp; | |
1610 | ||
b5e89ed5 | 1611 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1612 | |
1613 | if (size & (size - 1)) | |
1614 | ++order; | |
1615 | ||
1616 | return order; | |
1617 | } | |
1618 | EXPORT_SYMBOL(drm_order); |