Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_bufs.c |
1da177e4 | 3 | * Generic buffer template |
b5e89ed5 | 4 | * |
1da177e4 LT |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com | |
11 | * | |
12 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. | |
13 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
14 | * All Rights Reserved. | |
15 | * | |
16 | * Permission is hereby granted, free of charge, to any person obtaining a | |
17 | * copy of this software and associated documentation files (the "Software"), | |
18 | * to deal in the Software without restriction, including without limitation | |
19 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
20 | * and/or sell copies of the Software, and to permit persons to whom the | |
21 | * Software is furnished to do so, subject to the following conditions: | |
22 | * | |
23 | * The above copyright notice and this permission notice (including the next | |
24 | * paragraph) shall be included in all copies or substantial portions of the | |
25 | * Software. | |
26 | * | |
27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
28 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
29 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
30 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
31 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
32 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
33 | * OTHER DEALINGS IN THE SOFTWARE. | |
34 | */ | |
35 | ||
36 | #include <linux/vmalloc.h> | |
37 | #include "drmP.h" | |
38 | ||
d883f7f1 | 39 | resource_size_t drm_get_resource_start(struct drm_device *dev, unsigned int resource) |
1da177e4 | 40 | { |
836cf046 DA |
41 | return pci_resource_start(dev->pdev, resource); |
42 | } | |
43 | EXPORT_SYMBOL(drm_get_resource_start); | |
1da177e4 | 44 | |
d883f7f1 | 45 | resource_size_t drm_get_resource_len(struct drm_device *dev, unsigned int resource) |
836cf046 DA |
46 | { |
47 | return pci_resource_len(dev->pdev, resource); | |
48 | } | |
b5e89ed5 | 49 | |
836cf046 | 50 | EXPORT_SYMBOL(drm_get_resource_len); |
1da177e4 | 51 | |
55910517 | 52 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
f77d390c | 53 | struct drm_local_map *map) |
836cf046 | 54 | { |
55910517 | 55 | struct drm_map_list *entry; |
bd1b331f | 56 | list_for_each_entry(entry, &dev->maplist, head) { |
41c2e75e BH |
57 | /* |
58 | * Because the kernel-userspace ABI is fixed at a 32-bit offset | |
59 | * while PCI resources may live above that, we ignore the map | |
60 | * offset for maps of type _DRM_FRAMEBUFFER or _DRM_REGISTERS. | |
61 | * It is assumed that each driver will have only one resource of | |
62 | * each type. | |
63 | */ | |
64 | if (!entry->map || | |
65 | map->type != entry->map->type || | |
66 | entry->master != dev->primary->master) | |
67 | continue; | |
68 | switch (map->type) { | |
69 | case _DRM_SHM: | |
70 | if (map->flags != _DRM_CONTAINS_LOCK) | |
71 | break; | |
72 | case _DRM_REGISTERS: | |
73 | case _DRM_FRAME_BUFFER: | |
89625eb1 | 74 | return entry; |
41c2e75e BH |
75 | default: /* Make gcc happy */ |
76 | ; | |
836cf046 | 77 | } |
41c2e75e BH |
78 | if (entry->map->offset == map->offset) |
79 | return entry; | |
836cf046 DA |
80 | } |
81 | ||
82 | return NULL; | |
1da177e4 | 83 | } |
1da177e4 | 84 | |
e0be428e | 85 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
fb41e54b | 86 | unsigned long user_token, int hashed_handle) |
d1f2b55a | 87 | { |
8d153f71 | 88 | int use_hashed_handle; |
c2604ce0 | 89 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
90 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
91 | #elif (BITS_PER_LONG == 32) | |
92 | use_hashed_handle = hashed_handle; | |
93 | #else | |
94 | #error Unsupported long size. Neither 64 nor 32 bits. | |
95 | #endif | |
d1f2b55a | 96 | |
e08870c8 TH |
97 | if (!use_hashed_handle) { |
98 | int ret; | |
1545085a | 99 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
100 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
101 | if (ret != -EINVAL) | |
102 | return ret; | |
d1f2b55a | 103 | } |
e08870c8 TH |
104 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
105 | user_token, 32 - PAGE_SHIFT - 3, | |
1545085a | 106 | 0, DRM_MAP_HASH_OFFSET >> PAGE_SHIFT); |
d1f2b55a | 107 | } |
9a186645 | 108 | |
1da177e4 | 109 | /** |
f77d390c BH |
110 | * Core function to create a range of memory available for mapping by a |
111 | * non-root process. | |
1da177e4 LT |
112 | * |
113 | * Adjusts the memory offset to its absolute value according to the mapping | |
114 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
115 | * applicable and if supported by the kernel. | |
116 | */ | |
41c2e75e | 117 | static int drm_addmap_core(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 118 | unsigned int size, enum drm_map_type type, |
55910517 DA |
119 | enum drm_map_flags flags, |
120 | struct drm_map_list ** maplist) | |
1da177e4 | 121 | { |
f77d390c | 122 | struct drm_local_map *map; |
55910517 | 123 | struct drm_map_list *list; |
9c8da5eb | 124 | drm_dma_handle_t *dmah; |
8d153f71 TH |
125 | unsigned long user_token; |
126 | int ret; | |
1da177e4 | 127 | |
b5e89ed5 DA |
128 | map = drm_alloc(sizeof(*map), DRM_MEM_MAPS); |
129 | if (!map) | |
1da177e4 LT |
130 | return -ENOMEM; |
131 | ||
7ab98401 DA |
132 | map->offset = offset; |
133 | map->size = size; | |
134 | map->flags = flags; | |
135 | map->type = type; | |
1da177e4 LT |
136 | |
137 | /* Only allow shared memory to be removable since we only keep enough | |
138 | * book keeping information about shared memory to allow for removal | |
139 | * when processes fork. | |
140 | */ | |
b5e89ed5 DA |
141 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
142 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
143 | return -EINVAL; |
144 | } | |
41c2e75e BH |
145 | DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n", |
146 | (unsigned long long)map->offset, map->size, map->type); | |
147 | if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) { | |
b5e89ed5 | 148 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
149 | return -EINVAL; |
150 | } | |
b5e89ed5 | 151 | map->mtrr = -1; |
1da177e4 LT |
152 | map->handle = NULL; |
153 | ||
b5e89ed5 | 154 | switch (map->type) { |
1da177e4 LT |
155 | case _DRM_REGISTERS: |
156 | case _DRM_FRAME_BUFFER: | |
88f399cd | 157 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) |
8d2ea625 | 158 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 DA |
159 | map->offset < virt_to_phys(high_memory)) { |
160 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
161 | return -EINVAL; |
162 | } | |
163 | #endif | |
164 | #ifdef __alpha__ | |
165 | map->offset += dev->hose->mem_space->start; | |
166 | #endif | |
836cf046 DA |
167 | /* Some drivers preinitialize some maps, without the X Server |
168 | * needing to be aware of it. Therefore, we just return success | |
169 | * when the server tries to create a duplicate map. | |
170 | */ | |
89625eb1 DA |
171 | list = drm_find_matching_map(dev, map); |
172 | if (list != NULL) { | |
173 | if (list->map->size != map->size) { | |
836cf046 | 174 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
175 | "mismatched sizes, (%ld vs %ld)\n", |
176 | map->type, map->size, | |
177 | list->map->size); | |
89625eb1 | 178 | list->map->size = map->size; |
836cf046 DA |
179 | } |
180 | ||
181 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
89625eb1 | 182 | *maplist = list; |
836cf046 DA |
183 | return 0; |
184 | } | |
185 | ||
1da177e4 | 186 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
187 | if (map->type == _DRM_FRAME_BUFFER || |
188 | (map->flags & _DRM_WRITE_COMBINING)) { | |
189 | map->mtrr = mtrr_add(map->offset, map->size, | |
190 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
191 | } |
192 | } | |
0769d39c | 193 | if (map->type == _DRM_REGISTERS) { |
004a7727 | 194 | map->handle = ioremap(map->offset, map->size); |
0769d39c ST |
195 | if (!map->handle) { |
196 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
197 | return -ENOMEM; | |
198 | } | |
199 | } | |
bc5f4523 | 200 | |
1da177e4 | 201 | break; |
1da177e4 | 202 | case _DRM_SHM: |
54ba2f76 DA |
203 | list = drm_find_matching_map(dev, map); |
204 | if (list != NULL) { | |
205 | if(list->map->size != map->size) { | |
206 | DRM_DEBUG("Matching maps of type %d with " | |
207 | "mismatched sizes, (%ld vs %ld)\n", | |
208 | map->type, map->size, list->map->size); | |
209 | list->map->size = map->size; | |
210 | } | |
211 | ||
212 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
213 | *maplist = list; | |
214 | return 0; | |
215 | } | |
f239b7b0 | 216 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
217 | DRM_DEBUG("%lu %d %p\n", |
218 | map->size, drm_order(map->size), map->handle); | |
219 | if (!map->handle) { | |
220 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
221 | return -ENOMEM; |
222 | } | |
223 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 224 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 225 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
7c1c2871 | 226 | if (dev->primary->master->lock.hw_lock != NULL) { |
b5e89ed5 DA |
227 | vfree(map->handle); |
228 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
229 | return -EBUSY; |
230 | } | |
7c1c2871 | 231 | dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
232 | } |
233 | break; | |
54ba2f76 | 234 | case _DRM_AGP: { |
55910517 | 235 | struct drm_agp_mem *entry; |
54ba2f76 DA |
236 | int valid = 0; |
237 | ||
238 | if (!drm_core_has_AGP(dev)) { | |
239 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
240 | return -EINVAL; | |
241 | } | |
1da177e4 | 242 | #ifdef __alpha__ |
54ba2f76 | 243 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 244 | #endif |
47a184a8 EA |
245 | /* In some cases (i810 driver), user space may have already |
246 | * added the AGP base itself, because dev->agp->base previously | |
247 | * only got set during AGP enable. So, only add the base | |
248 | * address if the map's offset isn't already within the | |
249 | * aperture. | |
54ba2f76 | 250 | */ |
47a184a8 EA |
251 | if (map->offset < dev->agp->base || |
252 | map->offset > dev->agp->base + | |
253 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
254 | map->offset += dev->agp->base; | |
255 | } | |
54ba2f76 DA |
256 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
257 | ||
258 | /* This assumes the DRM is in total control of AGP space. | |
259 | * It's not always the case as AGP can be in the control | |
260 | * of user space (i.e. i810 driver). So this loop will get | |
261 | * skipped and we double check that dev->agp->memory is | |
262 | * actually set as well as being invalid before EPERM'ing | |
263 | */ | |
bd1b331f | 264 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
265 | if ((map->offset >= entry->bound) && |
266 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
267 | valid = 1; | |
268 | break; | |
269 | } | |
1da177e4 | 270 | } |
bd1b331f | 271 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
272 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
273 | return -EPERM; | |
274 | } | |
41c2e75e BH |
275 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
276 | (unsigned long long)map->offset, map->size); | |
54ba2f76 | 277 | |
a2c0a97b JB |
278 | break; |
279 | case _DRM_GEM: | |
280 | DRM_ERROR("tried to rmmap GEM object\n"); | |
1da177e4 | 281 | break; |
54ba2f76 | 282 | } |
1da177e4 LT |
283 | case _DRM_SCATTER_GATHER: |
284 | if (!dev->sg) { | |
285 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
286 | return -EINVAL; | |
287 | } | |
d1f2b55a | 288 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 289 | break; |
b5e89ed5 | 290 | case _DRM_CONSISTENT: |
2d0f9eaf | 291 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 292 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
293 | * casting it down to 32 bits is no problem, but we |
294 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
295 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
296 | if (!dmah) { | |
2d0f9eaf DA |
297 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
298 | return -ENOMEM; | |
299 | } | |
9c8da5eb DA |
300 | map->handle = dmah->vaddr; |
301 | map->offset = (unsigned long)dmah->busaddr; | |
302 | kfree(dmah); | |
2d0f9eaf | 303 | break; |
1da177e4 | 304 | default: |
b5e89ed5 | 305 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
306 | return -EINVAL; |
307 | } | |
308 | ||
309 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); | |
b5e89ed5 | 310 | if (!list) { |
85abb3f9 | 311 | if (map->type == _DRM_REGISTERS) |
004a7727 | 312 | iounmap(map->handle); |
1da177e4 LT |
313 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
314 | return -EINVAL; | |
315 | } | |
316 | memset(list, 0, sizeof(*list)); | |
317 | list->map = map; | |
318 | ||
30e2fb18 | 319 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 320 | list_add(&list->head, &dev->maplist); |
8d153f71 | 321 | |
d1f2b55a | 322 | /* Assign a 32-bit handle */ |
30e2fb18 | 323 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
324 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
325 | map->offset; | |
a1d0fcf5 | 326 | ret = drm_map_handle(dev, &list->hash, user_token, 0); |
8d153f71 | 327 | if (ret) { |
85abb3f9 | 328 | if (map->type == _DRM_REGISTERS) |
004a7727 | 329 | iounmap(map->handle); |
8d153f71 TH |
330 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
331 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); | |
332 | mutex_unlock(&dev->struct_mutex); | |
333 | return ret; | |
334 | } | |
335 | ||
1545085a | 336 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 337 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 338 | |
7c1c2871 | 339 | list->master = dev->primary->master; |
89625eb1 | 340 | *maplist = list; |
7ab98401 | 341 | return 0; |
54ba2f76 | 342 | } |
89625eb1 | 343 | |
41c2e75e | 344 | int drm_addmap(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 345 | unsigned int size, enum drm_map_type type, |
f77d390c | 346 | enum drm_map_flags flags, struct drm_local_map ** map_ptr) |
89625eb1 | 347 | { |
55910517 | 348 | struct drm_map_list *list; |
89625eb1 DA |
349 | int rc; |
350 | ||
351 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
352 | if (!rc) | |
353 | *map_ptr = list->map; | |
354 | return rc; | |
355 | } | |
b5e89ed5 | 356 | |
7ab98401 DA |
357 | EXPORT_SYMBOL(drm_addmap); |
358 | ||
f77d390c BH |
359 | /** |
360 | * Ioctl to specify a range of memory that is available for mapping by a | |
361 | * non-root process. | |
362 | * | |
363 | * \param inode device inode. | |
364 | * \param file_priv DRM file private. | |
365 | * \param cmd command. | |
366 | * \param arg pointer to a drm_map structure. | |
367 | * \return zero on success or a negative value on error. | |
368 | * | |
369 | */ | |
c153f45f EA |
370 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
371 | struct drm_file *file_priv) | |
7ab98401 | 372 | { |
c153f45f | 373 | struct drm_map *map = data; |
55910517 | 374 | struct drm_map_list *maplist; |
7ab98401 DA |
375 | int err; |
376 | ||
7c1c2871 | 377 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
378 | return -EPERM; |
379 | ||
c153f45f EA |
380 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
381 | map->flags, &maplist); | |
7ab98401 | 382 | |
b5e89ed5 | 383 | if (err) |
7ab98401 | 384 | return err; |
d1f2b55a | 385 | |
67e1a014 | 386 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 387 | map->handle = (void *)(unsigned long)maplist->user_token; |
1da177e4 | 388 | return 0; |
88f399cd | 389 | } |
1da177e4 | 390 | |
1da177e4 LT |
391 | /** |
392 | * Remove a map private from list and deallocate resources if the mapping | |
393 | * isn't in use. | |
394 | * | |
1da177e4 LT |
395 | * Searches the map on drm_device::maplist, removes it from the list, see if |
396 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
397 | * being on use. | |
398 | * | |
7ab98401 | 399 | * \sa drm_addmap |
1da177e4 | 400 | */ |
f77d390c | 401 | int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 402 | { |
55910517 | 403 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 404 | drm_dma_handle_t dmah; |
bd1b331f | 405 | int found = 0; |
7c1c2871 | 406 | struct drm_master *master; |
1da177e4 | 407 | |
836cf046 | 408 | /* Find the list entry for the map and remove it */ |
bd1b331f | 409 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 410 | if (r_list->map == map) { |
7c1c2871 | 411 | master = r_list->master; |
bd1b331f | 412 | list_del(&r_list->head); |
1545085a TH |
413 | drm_ht_remove_key(&dev->map_hash, |
414 | r_list->user_token >> PAGE_SHIFT); | |
bd1b331f DA |
415 | drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS); |
416 | found = 1; | |
836cf046 DA |
417 | break; |
418 | } | |
1da177e4 LT |
419 | } |
420 | ||
bd1b331f | 421 | if (!found) |
1da177e4 | 422 | return -EINVAL; |
1da177e4 | 423 | |
836cf046 DA |
424 | switch (map->type) { |
425 | case _DRM_REGISTERS: | |
004a7727 | 426 | iounmap(map->handle); |
836cf046 DA |
427 | /* FALLTHROUGH */ |
428 | case _DRM_FRAME_BUFFER: | |
429 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
430 | int retcode; | |
b5e89ed5 DA |
431 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
432 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 433 | } |
836cf046 DA |
434 | break; |
435 | case _DRM_SHM: | |
436 | vfree(map->handle); | |
7c1c2871 DA |
437 | if (master) { |
438 | if (dev->sigdata.lock == master->lock.hw_lock) | |
439 | dev->sigdata.lock = NULL; | |
440 | master->lock.hw_lock = NULL; /* SHM removed */ | |
441 | master->lock.file_priv = NULL; | |
171901d1 | 442 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 443 | } |
836cf046 DA |
444 | break; |
445 | case _DRM_AGP: | |
446 | case _DRM_SCATTER_GATHER: | |
447 | break; | |
448 | case _DRM_CONSISTENT: | |
449 | dmah.vaddr = map->handle; | |
450 | dmah.busaddr = map->offset; | |
451 | dmah.size = map->size; | |
452 | __drm_pci_free(dev, &dmah); | |
453 | break; | |
a2c0a97b JB |
454 | case _DRM_GEM: |
455 | DRM_ERROR("tried to rmmap GEM object\n"); | |
456 | break; | |
1da177e4 | 457 | } |
836cf046 DA |
458 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
459 | ||
1da177e4 LT |
460 | return 0; |
461 | } | |
4e74f36d | 462 | EXPORT_SYMBOL(drm_rmmap_locked); |
836cf046 | 463 | |
f77d390c | 464 | int drm_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 DA |
465 | { |
466 | int ret; | |
467 | ||
30e2fb18 | 468 | mutex_lock(&dev->struct_mutex); |
836cf046 | 469 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 470 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
471 | |
472 | return ret; | |
473 | } | |
ba8bbcf6 | 474 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 475 | |
836cf046 DA |
476 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
477 | * the last close of the device, and this is necessary for cleanup when things | |
478 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
479 | * like a pointless exercise since they're going away anyway. | |
480 | * | |
481 | * One use case might be after addmap is allowed for normal users for SHM and | |
482 | * gets used by drivers that the server doesn't need to care about. This seems | |
483 | * unlikely. | |
f77d390c BH |
484 | * |
485 | * \param inode device inode. | |
486 | * \param file_priv DRM file private. | |
487 | * \param cmd command. | |
488 | * \param arg pointer to a struct drm_map structure. | |
489 | * \return zero on success or a negative value on error. | |
836cf046 | 490 | */ |
c153f45f EA |
491 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
492 | struct drm_file *file_priv) | |
7ab98401 | 493 | { |
c153f45f | 494 | struct drm_map *request = data; |
f77d390c | 495 | struct drm_local_map *map = NULL; |
55910517 | 496 | struct drm_map_list *r_list; |
836cf046 | 497 | int ret; |
7ab98401 | 498 | |
30e2fb18 | 499 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 500 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 501 | if (r_list->map && |
c153f45f | 502 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
503 | r_list->map->flags & _DRM_REMOVABLE) { |
504 | map = r_list->map; | |
505 | break; | |
506 | } | |
507 | } | |
508 | ||
509 | /* List has wrapped around to the head pointer, or its empty we didn't | |
510 | * find anything. | |
511 | */ | |
bd1b331f | 512 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 513 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
514 | return -EINVAL; |
515 | } | |
516 | ||
836cf046 DA |
517 | /* Register and framebuffer maps are permanent */ |
518 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 519 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
520 | return 0; |
521 | } | |
522 | ||
523 | ret = drm_rmmap_locked(dev, map); | |
524 | ||
30e2fb18 | 525 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
526 | |
527 | return ret; | |
7ab98401 | 528 | } |
1da177e4 LT |
529 | |
530 | /** | |
531 | * Cleanup after an error on one of the addbufs() functions. | |
532 | * | |
836cf046 | 533 | * \param dev DRM device. |
1da177e4 LT |
534 | * \param entry buffer entry where the error occurred. |
535 | * | |
536 | * Frees any pages and buffers associated with the given entry. | |
537 | */ | |
cdd55a29 DA |
538 | static void drm_cleanup_buf_error(struct drm_device * dev, |
539 | struct drm_buf_entry * entry) | |
1da177e4 LT |
540 | { |
541 | int i; | |
542 | ||
543 | if (entry->seg_count) { | |
544 | for (i = 0; i < entry->seg_count; i++) { | |
545 | if (entry->seglist[i]) { | |
ddf19b97 | 546 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
547 | } |
548 | } | |
549 | drm_free(entry->seglist, | |
b5e89ed5 DA |
550 | entry->seg_count * |
551 | sizeof(*entry->seglist), DRM_MEM_SEGS); | |
1da177e4 LT |
552 | |
553 | entry->seg_count = 0; | |
554 | } | |
555 | ||
b5e89ed5 DA |
556 | if (entry->buf_count) { |
557 | for (i = 0; i < entry->buf_count; i++) { | |
1da177e4 LT |
558 | if (entry->buflist[i].dev_private) { |
559 | drm_free(entry->buflist[i].dev_private, | |
b5e89ed5 DA |
560 | entry->buflist[i].dev_priv_size, |
561 | DRM_MEM_BUFS); | |
1da177e4 LT |
562 | } |
563 | } | |
564 | drm_free(entry->buflist, | |
b5e89ed5 DA |
565 | entry->buf_count * |
566 | sizeof(*entry->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
567 | |
568 | entry->buf_count = 0; | |
569 | } | |
570 | } | |
571 | ||
572 | #if __OS_HAS_AGP | |
573 | /** | |
d59431bf | 574 | * Add AGP buffers for DMA transfers. |
1da177e4 | 575 | * |
84b1fd10 | 576 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 577 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 578 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 579 | * |
1da177e4 LT |
580 | * After some sanity checks creates a drm_buf structure for each buffer and |
581 | * reallocates the buffer list of the same size order to accommodate the new | |
582 | * buffers. | |
583 | */ | |
84b1fd10 | 584 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 585 | { |
cdd55a29 DA |
586 | struct drm_device_dma *dma = dev->dma; |
587 | struct drm_buf_entry *entry; | |
55910517 | 588 | struct drm_agp_mem *agp_entry; |
056219e2 | 589 | struct drm_buf *buf; |
1da177e4 LT |
590 | unsigned long offset; |
591 | unsigned long agp_offset; | |
592 | int count; | |
593 | int order; | |
594 | int size; | |
595 | int alignment; | |
596 | int page_order; | |
597 | int total; | |
598 | int byte_count; | |
54ba2f76 | 599 | int i, valid; |
056219e2 | 600 | struct drm_buf **temp_buflist; |
1da177e4 | 601 | |
b5e89ed5 DA |
602 | if (!dma) |
603 | return -EINVAL; | |
1da177e4 | 604 | |
d59431bf DA |
605 | count = request->count; |
606 | order = drm_order(request->size); | |
1da177e4 LT |
607 | size = 1 << order; |
608 | ||
b5e89ed5 DA |
609 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
610 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
611 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
612 | total = PAGE_SIZE << page_order; | |
613 | ||
614 | byte_count = 0; | |
d59431bf | 615 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 616 | |
b5e89ed5 DA |
617 | DRM_DEBUG("count: %d\n", count); |
618 | DRM_DEBUG("order: %d\n", order); | |
619 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 620 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
621 | DRM_DEBUG("alignment: %d\n", alignment); |
622 | DRM_DEBUG("page_order: %d\n", page_order); | |
623 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 624 | |
b5e89ed5 DA |
625 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
626 | return -EINVAL; | |
627 | if (dev->queue_count) | |
628 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 629 | |
54ba2f76 DA |
630 | /* Make sure buffers are located in AGP memory that we own */ |
631 | valid = 0; | |
bd1b331f | 632 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
633 | if ((agp_offset >= agp_entry->bound) && |
634 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
635 | valid = 1; | |
636 | break; | |
637 | } | |
638 | } | |
bd1b331f | 639 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
640 | DRM_DEBUG("zone invalid\n"); |
641 | return -EINVAL; | |
642 | } | |
b5e89ed5 DA |
643 | spin_lock(&dev->count_lock); |
644 | if (dev->buf_use) { | |
645 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
646 | return -EBUSY; |
647 | } | |
b5e89ed5 DA |
648 | atomic_inc(&dev->buf_alloc); |
649 | spin_unlock(&dev->count_lock); | |
1da177e4 | 650 | |
30e2fb18 | 651 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 652 | entry = &dma->bufs[order]; |
b5e89ed5 | 653 | if (entry->buf_count) { |
30e2fb18 | 654 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
655 | atomic_dec(&dev->buf_alloc); |
656 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
657 | } |
658 | ||
659 | if (count < 0 || count > 4096) { | |
30e2fb18 | 660 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 661 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
662 | return -EINVAL; |
663 | } | |
664 | ||
b5e89ed5 DA |
665 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
666 | DRM_MEM_BUFS); | |
667 | if (!entry->buflist) { | |
30e2fb18 | 668 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 669 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
670 | return -ENOMEM; |
671 | } | |
b5e89ed5 | 672 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
673 | |
674 | entry->buf_size = size; | |
675 | entry->page_order = page_order; | |
676 | ||
677 | offset = 0; | |
678 | ||
b5e89ed5 DA |
679 | while (entry->buf_count < count) { |
680 | buf = &entry->buflist[entry->buf_count]; | |
681 | buf->idx = dma->buf_count + entry->buf_count; | |
682 | buf->total = alignment; | |
683 | buf->order = order; | |
684 | buf->used = 0; | |
1da177e4 | 685 | |
b5e89ed5 | 686 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
687 | buf->bus_address = agp_offset + offset; |
688 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 689 | buf->next = NULL; |
1da177e4 LT |
690 | buf->waiting = 0; |
691 | buf->pending = 0; | |
b5e89ed5 | 692 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 693 | buf->file_priv = NULL; |
1da177e4 LT |
694 | |
695 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
696 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
697 | if (!buf->dev_private) { | |
1da177e4 LT |
698 | /* Set count correctly so we free the proper amount. */ |
699 | entry->buf_count = count; | |
b5e89ed5 | 700 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 701 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 702 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
703 | return -ENOMEM; |
704 | } | |
b5e89ed5 | 705 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 706 | |
b5e89ed5 | 707 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
708 | |
709 | offset += alignment; | |
710 | entry->buf_count++; | |
711 | byte_count += PAGE_SIZE << page_order; | |
712 | } | |
713 | ||
b5e89ed5 | 714 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 715 | |
b5e89ed5 DA |
716 | temp_buflist = drm_realloc(dma->buflist, |
717 | dma->buf_count * sizeof(*dma->buflist), | |
718 | (dma->buf_count + entry->buf_count) | |
719 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
720 | if (!temp_buflist) { | |
1da177e4 | 721 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 722 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 723 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 724 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
725 | return -ENOMEM; |
726 | } | |
727 | dma->buflist = temp_buflist; | |
728 | ||
b5e89ed5 | 729 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
730 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
731 | } | |
732 | ||
733 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
734 | dma->seg_count += entry->seg_count; |
735 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
736 | dma->byte_count += byte_count; |
737 | ||
b5e89ed5 DA |
738 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
739 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 740 | |
30e2fb18 | 741 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 742 | |
d59431bf DA |
743 | request->count = entry->buf_count; |
744 | request->size = size; | |
1da177e4 LT |
745 | |
746 | dma->flags = _DRM_DMA_USE_AGP; | |
747 | ||
b5e89ed5 | 748 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
749 | return 0; |
750 | } | |
d84f76d3 | 751 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 752 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 753 | |
84b1fd10 | 754 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 755 | { |
cdd55a29 | 756 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
757 | int count; |
758 | int order; | |
759 | int size; | |
760 | int total; | |
761 | int page_order; | |
cdd55a29 | 762 | struct drm_buf_entry *entry; |
ddf19b97 | 763 | drm_dma_handle_t *dmah; |
056219e2 | 764 | struct drm_buf *buf; |
1da177e4 LT |
765 | int alignment; |
766 | unsigned long offset; | |
767 | int i; | |
768 | int byte_count; | |
769 | int page_count; | |
770 | unsigned long *temp_pagelist; | |
056219e2 | 771 | struct drm_buf **temp_buflist; |
1da177e4 | 772 | |
b5e89ed5 DA |
773 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
774 | return -EINVAL; | |
d985c108 | 775 | |
b5e89ed5 DA |
776 | if (!dma) |
777 | return -EINVAL; | |
1da177e4 | 778 | |
d985c108 DA |
779 | if (!capable(CAP_SYS_ADMIN)) |
780 | return -EPERM; | |
781 | ||
d59431bf DA |
782 | count = request->count; |
783 | order = drm_order(request->size); | |
1da177e4 LT |
784 | size = 1 << order; |
785 | ||
b5e89ed5 DA |
786 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
787 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 788 | |
b5e89ed5 DA |
789 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
790 | return -EINVAL; | |
791 | if (dev->queue_count) | |
792 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 793 | |
d59431bf | 794 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 795 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
796 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
797 | total = PAGE_SIZE << page_order; | |
798 | ||
b5e89ed5 DA |
799 | spin_lock(&dev->count_lock); |
800 | if (dev->buf_use) { | |
801 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
802 | return -EBUSY; |
803 | } | |
b5e89ed5 DA |
804 | atomic_inc(&dev->buf_alloc); |
805 | spin_unlock(&dev->count_lock); | |
1da177e4 | 806 | |
30e2fb18 | 807 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 808 | entry = &dma->bufs[order]; |
b5e89ed5 | 809 | if (entry->buf_count) { |
30e2fb18 | 810 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 811 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
812 | return -ENOMEM; /* May only call once for each order */ |
813 | } | |
814 | ||
815 | if (count < 0 || count > 4096) { | |
30e2fb18 | 816 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 817 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
818 | return -EINVAL; |
819 | } | |
820 | ||
b5e89ed5 DA |
821 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
822 | DRM_MEM_BUFS); | |
823 | if (!entry->buflist) { | |
30e2fb18 | 824 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 825 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
826 | return -ENOMEM; |
827 | } | |
b5e89ed5 DA |
828 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
829 | ||
830 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), | |
831 | DRM_MEM_SEGS); | |
832 | if (!entry->seglist) { | |
833 | drm_free(entry->buflist, | |
834 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
30e2fb18 | 835 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 836 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
837 | return -ENOMEM; |
838 | } | |
b5e89ed5 | 839 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
840 | |
841 | /* Keep the original pagelist until we know all the allocations | |
842 | * have succeeded | |
843 | */ | |
b5e89ed5 DA |
844 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
845 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
1da177e4 | 846 | if (!temp_pagelist) { |
b5e89ed5 DA |
847 | drm_free(entry->buflist, |
848 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
849 | drm_free(entry->seglist, | |
850 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); | |
30e2fb18 | 851 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 852 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
853 | return -ENOMEM; |
854 | } | |
855 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
856 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
857 | DRM_DEBUG("pagelist: %d entries\n", | |
858 | dma->page_count + (count << page_order)); | |
1da177e4 | 859 | |
b5e89ed5 | 860 | entry->buf_size = size; |
1da177e4 LT |
861 | entry->page_order = page_order; |
862 | byte_count = 0; | |
863 | page_count = 0; | |
864 | ||
b5e89ed5 | 865 | while (entry->buf_count < count) { |
bc5f4523 | 866 | |
ddf19b97 | 867 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); |
bc5f4523 | 868 | |
ddf19b97 | 869 | if (!dmah) { |
1da177e4 LT |
870 | /* Set count correctly so we free the proper amount. */ |
871 | entry->buf_count = count; | |
872 | entry->seg_count = count; | |
873 | drm_cleanup_buf_error(dev, entry); | |
b5e89ed5 DA |
874 | drm_free(temp_pagelist, |
875 | (dma->page_count + (count << page_order)) | |
876 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 877 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 878 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
879 | return -ENOMEM; |
880 | } | |
ddf19b97 | 881 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
882 | for (i = 0; i < (1 << page_order); i++) { |
883 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
884 | dma->page_count + page_count, | |
ddf19b97 | 885 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 886 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 887 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 888 | } |
b5e89ed5 DA |
889 | for (offset = 0; |
890 | offset + size <= total && entry->buf_count < count; | |
891 | offset += alignment, ++entry->buf_count) { | |
892 | buf = &entry->buflist[entry->buf_count]; | |
893 | buf->idx = dma->buf_count + entry->buf_count; | |
894 | buf->total = alignment; | |
895 | buf->order = order; | |
896 | buf->used = 0; | |
897 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
898 | buf->address = (void *)(dmah->vaddr + offset); |
899 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 900 | buf->next = NULL; |
1da177e4 LT |
901 | buf->waiting = 0; |
902 | buf->pending = 0; | |
b5e89ed5 | 903 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 904 | buf->file_priv = NULL; |
1da177e4 LT |
905 | |
906 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
907 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
908 | DRM_MEM_BUFS); | |
909 | if (!buf->dev_private) { | |
1da177e4 LT |
910 | /* Set count correctly so we free the proper amount. */ |
911 | entry->buf_count = count; | |
912 | entry->seg_count = count; | |
b5e89ed5 DA |
913 | drm_cleanup_buf_error(dev, entry); |
914 | drm_free(temp_pagelist, | |
915 | (dma->page_count + | |
916 | (count << page_order)) | |
917 | * sizeof(*dma->pagelist), | |
918 | DRM_MEM_PAGES); | |
30e2fb18 | 919 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 920 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
921 | return -ENOMEM; |
922 | } | |
b5e89ed5 | 923 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 924 | |
b5e89ed5 DA |
925 | DRM_DEBUG("buffer %d @ %p\n", |
926 | entry->buf_count, buf->address); | |
1da177e4 LT |
927 | } |
928 | byte_count += PAGE_SIZE << page_order; | |
929 | } | |
930 | ||
b5e89ed5 DA |
931 | temp_buflist = drm_realloc(dma->buflist, |
932 | dma->buf_count * sizeof(*dma->buflist), | |
933 | (dma->buf_count + entry->buf_count) | |
934 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
935 | if (!temp_buflist) { |
936 | /* Free the entry because it isn't valid */ | |
b5e89ed5 DA |
937 | drm_cleanup_buf_error(dev, entry); |
938 | drm_free(temp_pagelist, | |
939 | (dma->page_count + (count << page_order)) | |
940 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 941 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 942 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
943 | return -ENOMEM; |
944 | } | |
945 | dma->buflist = temp_buflist; | |
946 | ||
b5e89ed5 | 947 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
948 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
949 | } | |
950 | ||
951 | /* No allocations failed, so now we can replace the orginal pagelist | |
952 | * with the new one. | |
953 | */ | |
954 | if (dma->page_count) { | |
955 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
956 | dma->page_count * sizeof(*dma->pagelist), |
957 | DRM_MEM_PAGES); | |
1da177e4 LT |
958 | } |
959 | dma->pagelist = temp_pagelist; | |
960 | ||
961 | dma->buf_count += entry->buf_count; | |
962 | dma->seg_count += entry->seg_count; | |
963 | dma->page_count += entry->seg_count << page_order; | |
964 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
965 | ||
30e2fb18 | 966 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 967 | |
d59431bf DA |
968 | request->count = entry->buf_count; |
969 | request->size = size; | |
1da177e4 | 970 | |
3417f33e GS |
971 | if (request->flags & _DRM_PCI_BUFFER_RO) |
972 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
973 | ||
b5e89ed5 | 974 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
975 | return 0; |
976 | ||
977 | } | |
d84f76d3 | 978 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 979 | |
84b1fd10 | 980 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 981 | { |
cdd55a29 DA |
982 | struct drm_device_dma *dma = dev->dma; |
983 | struct drm_buf_entry *entry; | |
056219e2 | 984 | struct drm_buf *buf; |
1da177e4 LT |
985 | unsigned long offset; |
986 | unsigned long agp_offset; | |
987 | int count; | |
988 | int order; | |
989 | int size; | |
990 | int alignment; | |
991 | int page_order; | |
992 | int total; | |
993 | int byte_count; | |
994 | int i; | |
056219e2 | 995 | struct drm_buf **temp_buflist; |
1da177e4 | 996 | |
b5e89ed5 DA |
997 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
998 | return -EINVAL; | |
999 | ||
1000 | if (!dma) | |
1001 | return -EINVAL; | |
1da177e4 | 1002 | |
d985c108 DA |
1003 | if (!capable(CAP_SYS_ADMIN)) |
1004 | return -EPERM; | |
1005 | ||
d59431bf DA |
1006 | count = request->count; |
1007 | order = drm_order(request->size); | |
1da177e4 LT |
1008 | size = 1 << order; |
1009 | ||
b5e89ed5 DA |
1010 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
1011 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
1012 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
1013 | total = PAGE_SIZE << page_order; | |
1014 | ||
1015 | byte_count = 0; | |
d59431bf | 1016 | agp_offset = request->agp_start; |
1da177e4 | 1017 | |
b5e89ed5 DA |
1018 | DRM_DEBUG("count: %d\n", count); |
1019 | DRM_DEBUG("order: %d\n", order); | |
1020 | DRM_DEBUG("size: %d\n", size); | |
1021 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1022 | DRM_DEBUG("alignment: %d\n", alignment); | |
1023 | DRM_DEBUG("page_order: %d\n", page_order); | |
1024 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1025 | |
b5e89ed5 DA |
1026 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1027 | return -EINVAL; | |
1028 | if (dev->queue_count) | |
1029 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1030 | |
b5e89ed5 DA |
1031 | spin_lock(&dev->count_lock); |
1032 | if (dev->buf_use) { | |
1033 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1034 | return -EBUSY; |
1035 | } | |
b5e89ed5 DA |
1036 | atomic_inc(&dev->buf_alloc); |
1037 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1038 | |
30e2fb18 | 1039 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1040 | entry = &dma->bufs[order]; |
b5e89ed5 | 1041 | if (entry->buf_count) { |
30e2fb18 | 1042 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1043 | atomic_dec(&dev->buf_alloc); |
1044 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1045 | } |
1046 | ||
1047 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1048 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1049 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1050 | return -EINVAL; |
1051 | } | |
1052 | ||
b5e89ed5 DA |
1053 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
1054 | DRM_MEM_BUFS); | |
1055 | if (!entry->buflist) { | |
30e2fb18 | 1056 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1057 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1058 | return -ENOMEM; |
1059 | } | |
b5e89ed5 | 1060 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
1061 | |
1062 | entry->buf_size = size; | |
1063 | entry->page_order = page_order; | |
1064 | ||
1065 | offset = 0; | |
1066 | ||
b5e89ed5 DA |
1067 | while (entry->buf_count < count) { |
1068 | buf = &entry->buflist[entry->buf_count]; | |
1069 | buf->idx = dma->buf_count + entry->buf_count; | |
1070 | buf->total = alignment; | |
1071 | buf->order = order; | |
1072 | buf->used = 0; | |
1da177e4 | 1073 | |
b5e89ed5 | 1074 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1075 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1076 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1077 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1078 | buf->next = NULL; |
1da177e4 LT |
1079 | buf->waiting = 0; |
1080 | buf->pending = 0; | |
b5e89ed5 | 1081 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 1082 | buf->file_priv = NULL; |
1da177e4 LT |
1083 | |
1084 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
1085 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
1086 | if (!buf->dev_private) { | |
1da177e4 LT |
1087 | /* Set count correctly so we free the proper amount. */ |
1088 | entry->buf_count = count; | |
b5e89ed5 | 1089 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1090 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1091 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1092 | return -ENOMEM; |
1093 | } | |
1094 | ||
b5e89ed5 | 1095 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1096 | |
b5e89ed5 | 1097 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1098 | |
1099 | offset += alignment; | |
1100 | entry->buf_count++; | |
1101 | byte_count += PAGE_SIZE << page_order; | |
1102 | } | |
1103 | ||
b5e89ed5 | 1104 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1105 | |
b5e89ed5 DA |
1106 | temp_buflist = drm_realloc(dma->buflist, |
1107 | dma->buf_count * sizeof(*dma->buflist), | |
1108 | (dma->buf_count + entry->buf_count) | |
1109 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1110 | if (!temp_buflist) { | |
1da177e4 | 1111 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1112 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1113 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1114 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1115 | return -ENOMEM; |
1116 | } | |
1117 | dma->buflist = temp_buflist; | |
1118 | ||
b5e89ed5 | 1119 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1120 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1121 | } | |
1122 | ||
1123 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1124 | dma->seg_count += entry->seg_count; |
1125 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1126 | dma->byte_count += byte_count; |
1127 | ||
b5e89ed5 DA |
1128 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1129 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1130 | |
30e2fb18 | 1131 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1132 | |
d59431bf DA |
1133 | request->count = entry->buf_count; |
1134 | request->size = size; | |
1da177e4 LT |
1135 | |
1136 | dma->flags = _DRM_DMA_USE_SG; | |
1137 | ||
b5e89ed5 | 1138 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1139 | return 0; |
1140 | } | |
1141 | ||
84b1fd10 | 1142 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1143 | { |
cdd55a29 DA |
1144 | struct drm_device_dma *dma = dev->dma; |
1145 | struct drm_buf_entry *entry; | |
056219e2 | 1146 | struct drm_buf *buf; |
b84397d6 DA |
1147 | unsigned long offset; |
1148 | unsigned long agp_offset; | |
1149 | int count; | |
1150 | int order; | |
1151 | int size; | |
1152 | int alignment; | |
1153 | int page_order; | |
1154 | int total; | |
1155 | int byte_count; | |
1156 | int i; | |
056219e2 | 1157 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1158 | |
1159 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1160 | return -EINVAL; | |
b5e89ed5 | 1161 | |
b84397d6 DA |
1162 | if (!dma) |
1163 | return -EINVAL; | |
1164 | ||
d985c108 DA |
1165 | if (!capable(CAP_SYS_ADMIN)) |
1166 | return -EPERM; | |
1167 | ||
d59431bf DA |
1168 | count = request->count; |
1169 | order = drm_order(request->size); | |
b84397d6 DA |
1170 | size = 1 << order; |
1171 | ||
d59431bf | 1172 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1173 | ? PAGE_ALIGN(size) : size; |
1174 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1175 | total = PAGE_SIZE << page_order; | |
1176 | ||
1177 | byte_count = 0; | |
d59431bf | 1178 | agp_offset = request->agp_start; |
b84397d6 DA |
1179 | |
1180 | DRM_DEBUG("count: %d\n", count); | |
1181 | DRM_DEBUG("order: %d\n", order); | |
1182 | DRM_DEBUG("size: %d\n", size); | |
1183 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1184 | DRM_DEBUG("alignment: %d\n", alignment); | |
1185 | DRM_DEBUG("page_order: %d\n", page_order); | |
1186 | DRM_DEBUG("total: %d\n", total); | |
1187 | ||
1188 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1189 | return -EINVAL; | |
1190 | if (dev->queue_count) | |
1191 | return -EBUSY; /* Not while in use */ | |
1192 | ||
1193 | spin_lock(&dev->count_lock); | |
1194 | if (dev->buf_use) { | |
1195 | spin_unlock(&dev->count_lock); | |
1196 | return -EBUSY; | |
1197 | } | |
1198 | atomic_inc(&dev->buf_alloc); | |
1199 | spin_unlock(&dev->count_lock); | |
1200 | ||
30e2fb18 | 1201 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1202 | entry = &dma->bufs[order]; |
1203 | if (entry->buf_count) { | |
30e2fb18 | 1204 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1205 | atomic_dec(&dev->buf_alloc); |
1206 | return -ENOMEM; /* May only call once for each order */ | |
1207 | } | |
1208 | ||
1209 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1210 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1211 | atomic_dec(&dev->buf_alloc); |
1212 | return -EINVAL; | |
1213 | } | |
1214 | ||
1215 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), | |
1216 | DRM_MEM_BUFS); | |
1217 | if (!entry->buflist) { | |
30e2fb18 | 1218 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1219 | atomic_dec(&dev->buf_alloc); |
1220 | return -ENOMEM; | |
1221 | } | |
1222 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1223 | ||
1224 | entry->buf_size = size; | |
1225 | entry->page_order = page_order; | |
1226 | ||
1227 | offset = 0; | |
1228 | ||
1229 | while (entry->buf_count < count) { | |
1230 | buf = &entry->buflist[entry->buf_count]; | |
1231 | buf->idx = dma->buf_count + entry->buf_count; | |
1232 | buf->total = alignment; | |
1233 | buf->order = order; | |
1234 | buf->used = 0; | |
1235 | ||
1236 | buf->offset = (dma->byte_count + offset); | |
1237 | buf->bus_address = agp_offset + offset; | |
1238 | buf->address = (void *)(agp_offset + offset); | |
1239 | buf->next = NULL; | |
1240 | buf->waiting = 0; | |
1241 | buf->pending = 0; | |
1242 | init_waitqueue_head(&buf->dma_wait); | |
6c340eac | 1243 | buf->file_priv = NULL; |
b84397d6 DA |
1244 | |
1245 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
1246 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); | |
1247 | if (!buf->dev_private) { | |
1248 | /* Set count correctly so we free the proper amount. */ | |
1249 | entry->buf_count = count; | |
1250 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1251 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1252 | atomic_dec(&dev->buf_alloc); |
1253 | return -ENOMEM; | |
1254 | } | |
1255 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1256 | ||
1257 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1258 | ||
1259 | offset += alignment; | |
1260 | entry->buf_count++; | |
1261 | byte_count += PAGE_SIZE << page_order; | |
1262 | } | |
1263 | ||
1264 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1265 | ||
1266 | temp_buflist = drm_realloc(dma->buflist, | |
1267 | dma->buf_count * sizeof(*dma->buflist), | |
1268 | (dma->buf_count + entry->buf_count) | |
1269 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1270 | if (!temp_buflist) { | |
1271 | /* Free the entry because it isn't valid */ | |
1272 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1273 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1274 | atomic_dec(&dev->buf_alloc); |
1275 | return -ENOMEM; | |
1276 | } | |
1277 | dma->buflist = temp_buflist; | |
1278 | ||
1279 | for (i = 0; i < entry->buf_count; i++) { | |
1280 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1281 | } | |
1282 | ||
1283 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1284 | dma->seg_count += entry->seg_count; |
1285 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1286 | dma->byte_count += byte_count; |
1287 | ||
1288 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1289 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1290 | ||
30e2fb18 | 1291 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1292 | |
d59431bf DA |
1293 | request->count = entry->buf_count; |
1294 | request->size = size; | |
b84397d6 DA |
1295 | |
1296 | dma->flags = _DRM_DMA_USE_FB; | |
1297 | ||
1298 | atomic_dec(&dev->buf_alloc); | |
1299 | return 0; | |
1300 | } | |
d985c108 | 1301 | |
b84397d6 | 1302 | |
1da177e4 LT |
1303 | /** |
1304 | * Add buffers for DMA transfers (ioctl). | |
1305 | * | |
1306 | * \param inode device inode. | |
6c340eac | 1307 | * \param file_priv DRM file private. |
1da177e4 | 1308 | * \param cmd command. |
c60ce623 | 1309 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1310 | * \return zero on success or a negative number on failure. |
1311 | * | |
1312 | * According with the memory type specified in drm_buf_desc::flags and the | |
1313 | * build options, it dispatches the call either to addbufs_agp(), | |
1314 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1315 | * PCI memory respectively. | |
1316 | */ | |
c153f45f EA |
1317 | int drm_addbufs(struct drm_device *dev, void *data, |
1318 | struct drm_file *file_priv) | |
1da177e4 | 1319 | { |
c153f45f | 1320 | struct drm_buf_desc *request = data; |
d59431bf | 1321 | int ret; |
b5e89ed5 | 1322 | |
1da177e4 LT |
1323 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1324 | return -EINVAL; | |
1325 | ||
1da177e4 | 1326 | #if __OS_HAS_AGP |
c153f45f EA |
1327 | if (request->flags & _DRM_AGP_BUFFER) |
1328 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1329 | else |
1330 | #endif | |
c153f45f EA |
1331 | if (request->flags & _DRM_SG_BUFFER) |
1332 | ret = drm_addbufs_sg(dev, request); | |
1333 | else if (request->flags & _DRM_FB_BUFFER) | |
1334 | ret = drm_addbufs_fb(dev, request); | |
1da177e4 | 1335 | else |
c153f45f | 1336 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1337 | |
d59431bf | 1338 | return ret; |
1da177e4 LT |
1339 | } |
1340 | ||
1da177e4 LT |
1341 | /** |
1342 | * Get information about the buffer mappings. | |
1343 | * | |
1344 | * This was originally mean for debugging purposes, or by a sophisticated | |
1345 | * client library to determine how best to use the available buffers (e.g., | |
1346 | * large buffers can be used for image transfer). | |
1347 | * | |
1348 | * \param inode device inode. | |
6c340eac | 1349 | * \param file_priv DRM file private. |
1da177e4 LT |
1350 | * \param cmd command. |
1351 | * \param arg pointer to a drm_buf_info structure. | |
1352 | * \return zero on success or a negative number on failure. | |
1353 | * | |
1354 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1355 | * lock, preventing of allocating more buffers after this call. Information | |
1356 | * about each requested buffer is then copied into user space. | |
1357 | */ | |
c153f45f EA |
1358 | int drm_infobufs(struct drm_device *dev, void *data, |
1359 | struct drm_file *file_priv) | |
1da177e4 | 1360 | { |
cdd55a29 | 1361 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1362 | struct drm_buf_info *request = data; |
1da177e4 LT |
1363 | int i; |
1364 | int count; | |
1365 | ||
1366 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1367 | return -EINVAL; | |
1368 | ||
b5e89ed5 DA |
1369 | if (!dma) |
1370 | return -EINVAL; | |
1da177e4 | 1371 | |
b5e89ed5 DA |
1372 | spin_lock(&dev->count_lock); |
1373 | if (atomic_read(&dev->buf_alloc)) { | |
1374 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1375 | return -EBUSY; |
1376 | } | |
1377 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1378 | spin_unlock(&dev->count_lock); |
1da177e4 | 1379 | |
b5e89ed5 DA |
1380 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1381 | if (dma->bufs[i].buf_count) | |
1382 | ++count; | |
1da177e4 LT |
1383 | } |
1384 | ||
b5e89ed5 | 1385 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1386 | |
c153f45f | 1387 | if (request->count >= count) { |
b5e89ed5 DA |
1388 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1389 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1390 | struct drm_buf_desc __user *to = |
c153f45f | 1391 | &request->list[count]; |
cdd55a29 DA |
1392 | struct drm_buf_entry *from = &dma->bufs[i]; |
1393 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1394 | if (copy_to_user(&to->count, |
1395 | &from->buf_count, | |
1396 | sizeof(from->buf_count)) || | |
1397 | copy_to_user(&to->size, | |
1398 | &from->buf_size, | |
1399 | sizeof(from->buf_size)) || | |
1400 | copy_to_user(&to->low_mark, | |
1401 | &list->low_mark, | |
1402 | sizeof(list->low_mark)) || | |
1403 | copy_to_user(&to->high_mark, | |
1404 | &list->high_mark, | |
1405 | sizeof(list->high_mark))) | |
1da177e4 LT |
1406 | return -EFAULT; |
1407 | ||
b5e89ed5 DA |
1408 | DRM_DEBUG("%d %d %d %d %d\n", |
1409 | i, | |
1410 | dma->bufs[i].buf_count, | |
1411 | dma->bufs[i].buf_size, | |
1412 | dma->bufs[i].freelist.low_mark, | |
1413 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1414 | ++count; |
1415 | } | |
1416 | } | |
1417 | } | |
c153f45f | 1418 | request->count = count; |
1da177e4 LT |
1419 | |
1420 | return 0; | |
1421 | } | |
1422 | ||
1423 | /** | |
1424 | * Specifies a low and high water mark for buffer allocation | |
1425 | * | |
1426 | * \param inode device inode. | |
6c340eac | 1427 | * \param file_priv DRM file private. |
1da177e4 LT |
1428 | * \param cmd command. |
1429 | * \param arg a pointer to a drm_buf_desc structure. | |
1430 | * \return zero on success or a negative number on failure. | |
1431 | * | |
1432 | * Verifies that the size order is bounded between the admissible orders and | |
1433 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1434 | * | |
1435 | * \note This ioctl is deprecated and mostly never used. | |
1436 | */ | |
c153f45f EA |
1437 | int drm_markbufs(struct drm_device *dev, void *data, |
1438 | struct drm_file *file_priv) | |
1da177e4 | 1439 | { |
cdd55a29 | 1440 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1441 | struct drm_buf_desc *request = data; |
1da177e4 | 1442 | int order; |
cdd55a29 | 1443 | struct drm_buf_entry *entry; |
1da177e4 LT |
1444 | |
1445 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1446 | return -EINVAL; | |
1447 | ||
b5e89ed5 DA |
1448 | if (!dma) |
1449 | return -EINVAL; | |
1da177e4 | 1450 | |
b5e89ed5 | 1451 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f EA |
1452 | request->size, request->low_mark, request->high_mark); |
1453 | order = drm_order(request->size); | |
b5e89ed5 DA |
1454 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1455 | return -EINVAL; | |
1da177e4 LT |
1456 | entry = &dma->bufs[order]; |
1457 | ||
c153f45f | 1458 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1459 | return -EINVAL; |
c153f45f | 1460 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1461 | return -EINVAL; |
1462 | ||
c153f45f EA |
1463 | entry->freelist.low_mark = request->low_mark; |
1464 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1465 | |
1466 | return 0; | |
1467 | } | |
1468 | ||
1469 | /** | |
b5e89ed5 | 1470 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1471 | * |
1472 | * \param inode device inode. | |
6c340eac | 1473 | * \param file_priv DRM file private. |
1da177e4 LT |
1474 | * \param cmd command. |
1475 | * \param arg pointer to a drm_buf_free structure. | |
1476 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1477 | * |
1da177e4 LT |
1478 | * Calls free_buffer() for each used buffer. |
1479 | * This function is primarily used for debugging. | |
1480 | */ | |
c153f45f EA |
1481 | int drm_freebufs(struct drm_device *dev, void *data, |
1482 | struct drm_file *file_priv) | |
1da177e4 | 1483 | { |
cdd55a29 | 1484 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1485 | struct drm_buf_free *request = data; |
1da177e4 LT |
1486 | int i; |
1487 | int idx; | |
056219e2 | 1488 | struct drm_buf *buf; |
1da177e4 LT |
1489 | |
1490 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1491 | return -EINVAL; | |
1492 | ||
b5e89ed5 DA |
1493 | if (!dma) |
1494 | return -EINVAL; | |
1da177e4 | 1495 | |
c153f45f EA |
1496 | DRM_DEBUG("%d\n", request->count); |
1497 | for (i = 0; i < request->count; i++) { | |
1498 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1499 | return -EFAULT; |
b5e89ed5 DA |
1500 | if (idx < 0 || idx >= dma->buf_count) { |
1501 | DRM_ERROR("Index %d (of %d max)\n", | |
1502 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1503 | return -EINVAL; |
1504 | } | |
1505 | buf = dma->buflist[idx]; | |
6c340eac | 1506 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1507 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1508 | task_pid_nr(current)); |
1da177e4 LT |
1509 | return -EINVAL; |
1510 | } | |
b5e89ed5 | 1511 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1512 | } |
1513 | ||
1514 | return 0; | |
1515 | } | |
1516 | ||
1517 | /** | |
1518 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1519 | * | |
1520 | * \param inode device inode. | |
6c340eac | 1521 | * \param file_priv DRM file private. |
1da177e4 LT |
1522 | * \param cmd command. |
1523 | * \param arg pointer to a drm_buf_map structure. | |
1524 | * \return zero on success or a negative number on failure. | |
1525 | * | |
3417f33e GS |
1526 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1527 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1528 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1529 | * drm_mmap_dma(). | |
1da177e4 | 1530 | */ |
c153f45f EA |
1531 | int drm_mapbufs(struct drm_device *dev, void *data, |
1532 | struct drm_file *file_priv) | |
1da177e4 | 1533 | { |
cdd55a29 | 1534 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1535 | int retcode = 0; |
1536 | const int zero = 0; | |
1537 | unsigned long virtual; | |
1538 | unsigned long address; | |
c153f45f | 1539 | struct drm_buf_map *request = data; |
1da177e4 LT |
1540 | int i; |
1541 | ||
1542 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1543 | return -EINVAL; | |
1544 | ||
b5e89ed5 DA |
1545 | if (!dma) |
1546 | return -EINVAL; | |
1da177e4 | 1547 | |
b5e89ed5 DA |
1548 | spin_lock(&dev->count_lock); |
1549 | if (atomic_read(&dev->buf_alloc)) { | |
1550 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1551 | return -EBUSY; |
1552 | } | |
1553 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1554 | spin_unlock(&dev->count_lock); |
1da177e4 | 1555 | |
c153f45f | 1556 | if (request->count >= dma->buf_count) { |
b84397d6 | 1557 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1558 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1559 | && (dma->flags & _DRM_DMA_USE_SG)) |
1560 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1561 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
f77d390c | 1562 | struct drm_local_map *map = dev->agp_buffer_map; |
d1f2b55a | 1563 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1564 | |
b5e89ed5 | 1565 | if (!map) { |
1da177e4 LT |
1566 | retcode = -EINVAL; |
1567 | goto done; | |
1568 | } | |
b5e89ed5 | 1569 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1570 | virtual = do_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1571 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1572 | MAP_SHARED, |
1573 | token); | |
b5e89ed5 | 1574 | up_write(¤t->mm->mmap_sem); |
1da177e4 | 1575 | } else { |
b5e89ed5 | 1576 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1577 | virtual = do_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1578 | PROT_READ | PROT_WRITE, |
1579 | MAP_SHARED, 0); | |
1580 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1581 | } |
b5e89ed5 | 1582 | if (virtual > -1024UL) { |
1da177e4 LT |
1583 | /* Real error */ |
1584 | retcode = (signed long)virtual; | |
1585 | goto done; | |
1586 | } | |
c153f45f | 1587 | request->virtual = (void __user *)virtual; |
1da177e4 | 1588 | |
b5e89ed5 | 1589 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1590 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1591 | &dma->buflist[i]->idx, |
c153f45f | 1592 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1593 | retcode = -EFAULT; |
1594 | goto done; | |
1595 | } | |
c153f45f | 1596 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1597 | &dma->buflist[i]->total, |
c153f45f | 1598 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1599 | retcode = -EFAULT; |
1600 | goto done; | |
1601 | } | |
c153f45f | 1602 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1603 | &zero, sizeof(zero))) { |
1da177e4 LT |
1604 | retcode = -EFAULT; |
1605 | goto done; | |
1606 | } | |
b5e89ed5 | 1607 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1608 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1609 | &address, sizeof(address))) { |
1da177e4 LT |
1610 | retcode = -EFAULT; |
1611 | goto done; | |
1612 | } | |
1613 | } | |
1614 | } | |
b5e89ed5 | 1615 | done: |
c153f45f EA |
1616 | request->count = dma->buf_count; |
1617 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1618 | |
1619 | return retcode; | |
1620 | } | |
1621 | ||
836cf046 DA |
1622 | /** |
1623 | * Compute size order. Returns the exponent of the smaller power of two which | |
1624 | * is greater or equal to given number. | |
b5e89ed5 | 1625 | * |
836cf046 DA |
1626 | * \param size size. |
1627 | * \return order. | |
1628 | * | |
1629 | * \todo Can be made faster. | |
1630 | */ | |
b5e89ed5 | 1631 | int drm_order(unsigned long size) |
836cf046 DA |
1632 | { |
1633 | int order; | |
1634 | unsigned long tmp; | |
1635 | ||
b5e89ed5 | 1636 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1637 | |
1638 | if (size & (size - 1)) | |
1639 | ++order; | |
1640 | ||
1641 | return order; | |
1642 | } | |
1643 | EXPORT_SYMBOL(drm_order); |