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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> | |
5a0e3ad6 | 37 | #include <linux/slab.h> |
f1a2a9b6 | 38 | #include <linux/log2.h> |
2d1a8a48 | 39 | #include <linux/export.h> |
f1a2a9b6 | 40 | #include <asm/shmparam.h> |
760285e7 | 41 | #include <drm/drmP.h> |
1da177e4 | 42 | |
55910517 | 43 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
f77d390c | 44 | struct drm_local_map *map) |
836cf046 | 45 | { |
55910517 | 46 | struct drm_map_list *entry; |
bd1b331f | 47 | list_for_each_entry(entry, &dev->maplist, head) { |
41c2e75e BH |
48 | /* |
49 | * Because the kernel-userspace ABI is fixed at a 32-bit offset | |
66aa6962 TV |
50 | * while PCI resources may live above that, we only compare the |
51 | * lower 32 bits of the map offset for maps of type | |
52 | * _DRM_FRAMEBUFFER or _DRM_REGISTERS. | |
53 | * It is assumed that if a driver have more than one resource | |
54 | * of each type, the lower 32 bits are different. | |
41c2e75e BH |
55 | */ |
56 | if (!entry->map || | |
57 | map->type != entry->map->type || | |
58 | entry->master != dev->primary->master) | |
59 | continue; | |
60 | switch (map->type) { | |
61 | case _DRM_SHM: | |
62 | if (map->flags != _DRM_CONTAINS_LOCK) | |
63 | break; | |
66aa6962 | 64 | return entry; |
41c2e75e BH |
65 | case _DRM_REGISTERS: |
66 | case _DRM_FRAME_BUFFER: | |
66aa6962 TV |
67 | if ((entry->map->offset & 0xffffffff) == |
68 | (map->offset & 0xffffffff)) | |
69 | return entry; | |
41c2e75e BH |
70 | default: /* Make gcc happy */ |
71 | ; | |
836cf046 | 72 | } |
41c2e75e BH |
73 | if (entry->map->offset == map->offset) |
74 | return entry; | |
836cf046 DA |
75 | } |
76 | ||
77 | return NULL; | |
1da177e4 | 78 | } |
1da177e4 | 79 | |
e0be428e | 80 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
f1a2a9b6 | 81 | unsigned long user_token, int hashed_handle, int shm) |
d1f2b55a | 82 | { |
f1a2a9b6 DM |
83 | int use_hashed_handle, shift; |
84 | unsigned long add; | |
85 | ||
c2604ce0 | 86 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
87 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
88 | #elif (BITS_PER_LONG == 32) | |
89 | use_hashed_handle = hashed_handle; | |
90 | #else | |
91 | #error Unsupported long size. Neither 64 nor 32 bits. | |
92 | #endif | |
d1f2b55a | 93 | |
e08870c8 TH |
94 | if (!use_hashed_handle) { |
95 | int ret; | |
1545085a | 96 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
97 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
98 | if (ret != -EINVAL) | |
99 | return ret; | |
d1f2b55a | 100 | } |
f1a2a9b6 DM |
101 | |
102 | shift = 0; | |
103 | add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT; | |
104 | if (shm && (SHMLBA > PAGE_SIZE)) { | |
105 | int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1; | |
106 | ||
107 | /* For shared memory, we have to preserve the SHMLBA | |
108 | * bits of the eventual vma->vm_pgoff value during | |
109 | * mmap(). Otherwise we run into cache aliasing problems | |
110 | * on some platforms. On these platforms, the pgoff of | |
111 | * a mmap() request is used to pick a suitable virtual | |
112 | * address for the mmap() region such that it will not | |
113 | * cause cache aliasing problems. | |
114 | * | |
115 | * Therefore, make sure the SHMLBA relevant bits of the | |
116 | * hash value we use are equal to those in the original | |
117 | * kernel virtual address. | |
118 | */ | |
119 | shift = bits; | |
120 | add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL)); | |
121 | } | |
122 | ||
e08870c8 TH |
123 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
124 | user_token, 32 - PAGE_SHIFT - 3, | |
f1a2a9b6 | 125 | shift, add); |
d1f2b55a | 126 | } |
9a186645 | 127 | |
1da177e4 | 128 | /** |
f77d390c BH |
129 | * Core function to create a range of memory available for mapping by a |
130 | * non-root process. | |
1da177e4 LT |
131 | * |
132 | * Adjusts the memory offset to its absolute value according to the mapping | |
133 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
134 | * applicable and if supported by the kernel. | |
135 | */ | |
41c2e75e | 136 | static int drm_addmap_core(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 137 | unsigned int size, enum drm_map_type type, |
55910517 DA |
138 | enum drm_map_flags flags, |
139 | struct drm_map_list ** maplist) | |
1da177e4 | 140 | { |
f77d390c | 141 | struct drm_local_map *map; |
55910517 | 142 | struct drm_map_list *list; |
9c8da5eb | 143 | drm_dma_handle_t *dmah; |
8d153f71 TH |
144 | unsigned long user_token; |
145 | int ret; | |
1da177e4 | 146 | |
9a298b2a | 147 | map = kmalloc(sizeof(*map), GFP_KERNEL); |
b5e89ed5 | 148 | if (!map) |
1da177e4 LT |
149 | return -ENOMEM; |
150 | ||
7ab98401 DA |
151 | map->offset = offset; |
152 | map->size = size; | |
153 | map->flags = flags; | |
154 | map->type = type; | |
1da177e4 LT |
155 | |
156 | /* Only allow shared memory to be removable since we only keep enough | |
157 | * book keeping information about shared memory to allow for removal | |
158 | * when processes fork. | |
159 | */ | |
b5e89ed5 | 160 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
9a298b2a | 161 | kfree(map); |
1da177e4 LT |
162 | return -EINVAL; |
163 | } | |
41c2e75e BH |
164 | DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n", |
165 | (unsigned long long)map->offset, map->size, map->type); | |
b6741377 BH |
166 | |
167 | /* page-align _DRM_SHM maps. They are allocated here so there is no security | |
168 | * hole created by that and it works around various broken drivers that use | |
169 | * a non-aligned quantity to map the SAREA. --BenH | |
170 | */ | |
171 | if (map->type == _DRM_SHM) | |
172 | map->size = PAGE_ALIGN(map->size); | |
173 | ||
41c2e75e | 174 | if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) { |
9a298b2a | 175 | kfree(map); |
1da177e4 LT |
176 | return -EINVAL; |
177 | } | |
b5e89ed5 | 178 | map->mtrr = -1; |
1da177e4 LT |
179 | map->handle = NULL; |
180 | ||
b5e89ed5 | 181 | switch (map->type) { |
1da177e4 LT |
182 | case _DRM_REGISTERS: |
183 | case _DRM_FRAME_BUFFER: | |
4b7fb9b5 | 184 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__arm__) |
8d2ea625 | 185 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 | 186 | map->offset < virt_to_phys(high_memory)) { |
9a298b2a | 187 | kfree(map); |
1da177e4 LT |
188 | return -EINVAL; |
189 | } | |
1da177e4 | 190 | #endif |
836cf046 DA |
191 | /* Some drivers preinitialize some maps, without the X Server |
192 | * needing to be aware of it. Therefore, we just return success | |
193 | * when the server tries to create a duplicate map. | |
194 | */ | |
89625eb1 DA |
195 | list = drm_find_matching_map(dev, map); |
196 | if (list != NULL) { | |
197 | if (list->map->size != map->size) { | |
836cf046 | 198 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
199 | "mismatched sizes, (%ld vs %ld)\n", |
200 | map->type, map->size, | |
201 | list->map->size); | |
89625eb1 | 202 | list->map->size = map->size; |
836cf046 DA |
203 | } |
204 | ||
9a298b2a | 205 | kfree(map); |
89625eb1 | 206 | *maplist = list; |
836cf046 DA |
207 | return 0; |
208 | } | |
209 | ||
28185647 DV |
210 | if (map->type == _DRM_FRAME_BUFFER || |
211 | (map->flags & _DRM_WRITE_COMBINING)) { | |
212 | map->mtrr = | |
213 | arch_phys_wc_add(map->offset, map->size); | |
1da177e4 | 214 | } |
0769d39c | 215 | if (map->type == _DRM_REGISTERS) { |
ff47eaf2 AL |
216 | if (map->flags & _DRM_WRITE_COMBINING) |
217 | map->handle = ioremap_wc(map->offset, | |
218 | map->size); | |
219 | else | |
220 | map->handle = ioremap(map->offset, map->size); | |
0769d39c | 221 | if (!map->handle) { |
9a298b2a | 222 | kfree(map); |
0769d39c ST |
223 | return -ENOMEM; |
224 | } | |
225 | } | |
bc5f4523 | 226 | |
1da177e4 | 227 | break; |
1da177e4 | 228 | case _DRM_SHM: |
54ba2f76 DA |
229 | list = drm_find_matching_map(dev, map); |
230 | if (list != NULL) { | |
231 | if(list->map->size != map->size) { | |
232 | DRM_DEBUG("Matching maps of type %d with " | |
233 | "mismatched sizes, (%ld vs %ld)\n", | |
234 | map->type, map->size, list->map->size); | |
235 | list->map->size = map->size; | |
236 | } | |
237 | ||
9a298b2a | 238 | kfree(map); |
54ba2f76 DA |
239 | *maplist = list; |
240 | return 0; | |
241 | } | |
f239b7b0 | 242 | map->handle = vmalloc_user(map->size); |
b5e89ed5 | 243 | DRM_DEBUG("%lu %d %p\n", |
04420c9c | 244 | map->size, order_base_2(map->size), map->handle); |
b5e89ed5 | 245 | if (!map->handle) { |
9a298b2a | 246 | kfree(map); |
1da177e4 LT |
247 | return -ENOMEM; |
248 | } | |
249 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 250 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 251 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
7c1c2871 | 252 | if (dev->primary->master->lock.hw_lock != NULL) { |
b5e89ed5 | 253 | vfree(map->handle); |
9a298b2a | 254 | kfree(map); |
1da177e4 LT |
255 | return -EBUSY; |
256 | } | |
7c1c2871 | 257 | dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
258 | } |
259 | break; | |
54ba2f76 | 260 | case _DRM_AGP: { |
55910517 | 261 | struct drm_agp_mem *entry; |
54ba2f76 DA |
262 | int valid = 0; |
263 | ||
d9906753 | 264 | if (!dev->agp) { |
9a298b2a | 265 | kfree(map); |
54ba2f76 DA |
266 | return -EINVAL; |
267 | } | |
1da177e4 | 268 | #ifdef __alpha__ |
54ba2f76 | 269 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 270 | #endif |
47a184a8 EA |
271 | /* In some cases (i810 driver), user space may have already |
272 | * added the AGP base itself, because dev->agp->base previously | |
273 | * only got set during AGP enable. So, only add the base | |
274 | * address if the map's offset isn't already within the | |
275 | * aperture. | |
54ba2f76 | 276 | */ |
47a184a8 EA |
277 | if (map->offset < dev->agp->base || |
278 | map->offset > dev->agp->base + | |
279 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
280 | map->offset += dev->agp->base; | |
281 | } | |
54ba2f76 DA |
282 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
283 | ||
284 | /* This assumes the DRM is in total control of AGP space. | |
285 | * It's not always the case as AGP can be in the control | |
286 | * of user space (i.e. i810 driver). So this loop will get | |
287 | * skipped and we double check that dev->agp->memory is | |
288 | * actually set as well as being invalid before EPERM'ing | |
289 | */ | |
bd1b331f | 290 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
291 | if ((map->offset >= entry->bound) && |
292 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
293 | valid = 1; | |
294 | break; | |
295 | } | |
1da177e4 | 296 | } |
bd1b331f | 297 | if (!list_empty(&dev->agp->memory) && !valid) { |
9a298b2a | 298 | kfree(map); |
54ba2f76 DA |
299 | return -EPERM; |
300 | } | |
41c2e75e BH |
301 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
302 | (unsigned long long)map->offset, map->size); | |
54ba2f76 | 303 | |
a2c0a97b | 304 | break; |
812c369d | 305 | } |
1da177e4 LT |
306 | case _DRM_SCATTER_GATHER: |
307 | if (!dev->sg) { | |
9a298b2a | 308 | kfree(map); |
1da177e4 LT |
309 | return -EINVAL; |
310 | } | |
d1f2b55a | 311 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 312 | break; |
b5e89ed5 | 313 | case _DRM_CONSISTENT: |
2d0f9eaf | 314 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 315 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
316 | * casting it down to 32 bits is no problem, but we |
317 | * need to point to a 64bit variable first. */ | |
e6be8d9d | 318 | dmah = drm_pci_alloc(dev, map->size, map->size); |
9c8da5eb | 319 | if (!dmah) { |
9a298b2a | 320 | kfree(map); |
2d0f9eaf DA |
321 | return -ENOMEM; |
322 | } | |
9c8da5eb DA |
323 | map->handle = dmah->vaddr; |
324 | map->offset = (unsigned long)dmah->busaddr; | |
325 | kfree(dmah); | |
2d0f9eaf | 326 | break; |
1da177e4 | 327 | default: |
9a298b2a | 328 | kfree(map); |
1da177e4 LT |
329 | return -EINVAL; |
330 | } | |
331 | ||
94e3370e | 332 | list = kzalloc(sizeof(*list), GFP_KERNEL); |
b5e89ed5 | 333 | if (!list) { |
85abb3f9 | 334 | if (map->type == _DRM_REGISTERS) |
004a7727 | 335 | iounmap(map->handle); |
9a298b2a | 336 | kfree(map); |
1da177e4 LT |
337 | return -EINVAL; |
338 | } | |
1da177e4 LT |
339 | list->map = map; |
340 | ||
30e2fb18 | 341 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 342 | list_add(&list->head, &dev->maplist); |
8d153f71 | 343 | |
d1f2b55a | 344 | /* Assign a 32-bit handle */ |
30e2fb18 | 345 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
346 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
347 | map->offset; | |
f1a2a9b6 DM |
348 | ret = drm_map_handle(dev, &list->hash, user_token, 0, |
349 | (map->type == _DRM_SHM)); | |
8d153f71 | 350 | if (ret) { |
85abb3f9 | 351 | if (map->type == _DRM_REGISTERS) |
004a7727 | 352 | iounmap(map->handle); |
9a298b2a EA |
353 | kfree(map); |
354 | kfree(list); | |
8d153f71 TH |
355 | mutex_unlock(&dev->struct_mutex); |
356 | return ret; | |
357 | } | |
358 | ||
1545085a | 359 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 360 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 361 | |
2ff2e8a3 BS |
362 | if (!(map->flags & _DRM_DRIVER)) |
363 | list->master = dev->primary->master; | |
89625eb1 | 364 | *maplist = list; |
7ab98401 | 365 | return 0; |
54ba2f76 | 366 | } |
89625eb1 | 367 | |
41c2e75e | 368 | int drm_addmap(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 369 | unsigned int size, enum drm_map_type type, |
f77d390c | 370 | enum drm_map_flags flags, struct drm_local_map ** map_ptr) |
89625eb1 | 371 | { |
55910517 | 372 | struct drm_map_list *list; |
89625eb1 DA |
373 | int rc; |
374 | ||
375 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
376 | if (!rc) | |
377 | *map_ptr = list->map; | |
378 | return rc; | |
379 | } | |
b5e89ed5 | 380 | |
7ab98401 DA |
381 | EXPORT_SYMBOL(drm_addmap); |
382 | ||
f77d390c BH |
383 | /** |
384 | * Ioctl to specify a range of memory that is available for mapping by a | |
385 | * non-root process. | |
386 | * | |
387 | * \param inode device inode. | |
388 | * \param file_priv DRM file private. | |
389 | * \param cmd command. | |
390 | * \param arg pointer to a drm_map structure. | |
391 | * \return zero on success or a negative value on error. | |
392 | * | |
393 | */ | |
c153f45f EA |
394 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
395 | struct drm_file *file_priv) | |
7ab98401 | 396 | { |
c153f45f | 397 | struct drm_map *map = data; |
55910517 | 398 | struct drm_map_list *maplist; |
7ab98401 DA |
399 | int err; |
400 | ||
7c1c2871 | 401 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
402 | return -EPERM; |
403 | ||
c153f45f EA |
404 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
405 | map->flags, &maplist); | |
7ab98401 | 406 | |
b5e89ed5 | 407 | if (err) |
7ab98401 | 408 | return err; |
d1f2b55a | 409 | |
67e1a014 | 410 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 411 | map->handle = (void *)(unsigned long)maplist->user_token; |
0dd99f1b AL |
412 | |
413 | /* | |
414 | * It appears that there are no users of this value whatsoever -- | |
415 | * drmAddMap just discards it. Let's not encourage its use. | |
416 | * (Keeping drm_addmap_core's returned mtrr value would be wrong -- | |
417 | * it's not a real mtrr index anymore.) | |
418 | */ | |
419 | map->mtrr = -1; | |
420 | ||
1da177e4 | 421 | return 0; |
88f399cd | 422 | } |
1da177e4 | 423 | |
1da177e4 LT |
424 | /** |
425 | * Remove a map private from list and deallocate resources if the mapping | |
426 | * isn't in use. | |
427 | * | |
1da177e4 LT |
428 | * Searches the map on drm_device::maplist, removes it from the list, see if |
429 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
430 | * being on use. | |
431 | * | |
7ab98401 | 432 | * \sa drm_addmap |
1da177e4 | 433 | */ |
f77d390c | 434 | int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 435 | { |
55910517 | 436 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 437 | drm_dma_handle_t dmah; |
bd1b331f | 438 | int found = 0; |
7c1c2871 | 439 | struct drm_master *master; |
1da177e4 | 440 | |
836cf046 | 441 | /* Find the list entry for the map and remove it */ |
bd1b331f | 442 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 443 | if (r_list->map == map) { |
7c1c2871 | 444 | master = r_list->master; |
bd1b331f | 445 | list_del(&r_list->head); |
1545085a TH |
446 | drm_ht_remove_key(&dev->map_hash, |
447 | r_list->user_token >> PAGE_SHIFT); | |
9a298b2a | 448 | kfree(r_list); |
bd1b331f | 449 | found = 1; |
836cf046 DA |
450 | break; |
451 | } | |
1da177e4 LT |
452 | } |
453 | ||
bd1b331f | 454 | if (!found) |
1da177e4 | 455 | return -EINVAL; |
1da177e4 | 456 | |
836cf046 DA |
457 | switch (map->type) { |
458 | case _DRM_REGISTERS: | |
004a7727 | 459 | iounmap(map->handle); |
836cf046 DA |
460 | /* FALLTHROUGH */ |
461 | case _DRM_FRAME_BUFFER: | |
28185647 | 462 | arch_phys_wc_del(map->mtrr); |
836cf046 DA |
463 | break; |
464 | case _DRM_SHM: | |
465 | vfree(map->handle); | |
7c1c2871 DA |
466 | if (master) { |
467 | if (dev->sigdata.lock == master->lock.hw_lock) | |
468 | dev->sigdata.lock = NULL; | |
469 | master->lock.hw_lock = NULL; /* SHM removed */ | |
470 | master->lock.file_priv = NULL; | |
171901d1 | 471 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 472 | } |
836cf046 DA |
473 | break; |
474 | case _DRM_AGP: | |
475 | case _DRM_SCATTER_GATHER: | |
476 | break; | |
477 | case _DRM_CONSISTENT: | |
478 | dmah.vaddr = map->handle; | |
479 | dmah.busaddr = map->offset; | |
480 | dmah.size = map->size; | |
481 | __drm_pci_free(dev, &dmah); | |
482 | break; | |
1da177e4 | 483 | } |
9a298b2a | 484 | kfree(map); |
836cf046 | 485 | |
1da177e4 LT |
486 | return 0; |
487 | } | |
4e74f36d | 488 | EXPORT_SYMBOL(drm_rmmap_locked); |
836cf046 | 489 | |
f77d390c | 490 | int drm_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 DA |
491 | { |
492 | int ret; | |
493 | ||
30e2fb18 | 494 | mutex_lock(&dev->struct_mutex); |
836cf046 | 495 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 496 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
497 | |
498 | return ret; | |
499 | } | |
ba8bbcf6 | 500 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 501 | |
836cf046 DA |
502 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
503 | * the last close of the device, and this is necessary for cleanup when things | |
504 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
505 | * like a pointless exercise since they're going away anyway. | |
506 | * | |
507 | * One use case might be after addmap is allowed for normal users for SHM and | |
508 | * gets used by drivers that the server doesn't need to care about. This seems | |
509 | * unlikely. | |
f77d390c BH |
510 | * |
511 | * \param inode device inode. | |
512 | * \param file_priv DRM file private. | |
513 | * \param cmd command. | |
514 | * \param arg pointer to a struct drm_map structure. | |
515 | * \return zero on success or a negative value on error. | |
836cf046 | 516 | */ |
c153f45f EA |
517 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
518 | struct drm_file *file_priv) | |
7ab98401 | 519 | { |
c153f45f | 520 | struct drm_map *request = data; |
f77d390c | 521 | struct drm_local_map *map = NULL; |
55910517 | 522 | struct drm_map_list *r_list; |
836cf046 | 523 | int ret; |
7ab98401 | 524 | |
30e2fb18 | 525 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 526 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 527 | if (r_list->map && |
c153f45f | 528 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
529 | r_list->map->flags & _DRM_REMOVABLE) { |
530 | map = r_list->map; | |
531 | break; | |
532 | } | |
533 | } | |
534 | ||
535 | /* List has wrapped around to the head pointer, or its empty we didn't | |
536 | * find anything. | |
537 | */ | |
bd1b331f | 538 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 539 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
540 | return -EINVAL; |
541 | } | |
542 | ||
836cf046 DA |
543 | /* Register and framebuffer maps are permanent */ |
544 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 545 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
546 | return 0; |
547 | } | |
548 | ||
549 | ret = drm_rmmap_locked(dev, map); | |
550 | ||
30e2fb18 | 551 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
552 | |
553 | return ret; | |
7ab98401 | 554 | } |
1da177e4 LT |
555 | |
556 | /** | |
557 | * Cleanup after an error on one of the addbufs() functions. | |
558 | * | |
836cf046 | 559 | * \param dev DRM device. |
1da177e4 LT |
560 | * \param entry buffer entry where the error occurred. |
561 | * | |
562 | * Frees any pages and buffers associated with the given entry. | |
563 | */ | |
cdd55a29 DA |
564 | static void drm_cleanup_buf_error(struct drm_device * dev, |
565 | struct drm_buf_entry * entry) | |
1da177e4 LT |
566 | { |
567 | int i; | |
568 | ||
569 | if (entry->seg_count) { | |
570 | for (i = 0; i < entry->seg_count; i++) { | |
571 | if (entry->seglist[i]) { | |
ddf19b97 | 572 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
573 | } |
574 | } | |
9a298b2a | 575 | kfree(entry->seglist); |
1da177e4 LT |
576 | |
577 | entry->seg_count = 0; | |
578 | } | |
579 | ||
b5e89ed5 DA |
580 | if (entry->buf_count) { |
581 | for (i = 0; i < entry->buf_count; i++) { | |
9a298b2a | 582 | kfree(entry->buflist[i].dev_private); |
1da177e4 | 583 | } |
9a298b2a | 584 | kfree(entry->buflist); |
1da177e4 LT |
585 | |
586 | entry->buf_count = 0; | |
587 | } | |
588 | } | |
589 | ||
590 | #if __OS_HAS_AGP | |
591 | /** | |
d59431bf | 592 | * Add AGP buffers for DMA transfers. |
1da177e4 | 593 | * |
84b1fd10 | 594 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 595 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 596 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 597 | * |
1da177e4 LT |
598 | * After some sanity checks creates a drm_buf structure for each buffer and |
599 | * reallocates the buffer list of the same size order to accommodate the new | |
600 | * buffers. | |
601 | */ | |
84b1fd10 | 602 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 603 | { |
cdd55a29 DA |
604 | struct drm_device_dma *dma = dev->dma; |
605 | struct drm_buf_entry *entry; | |
55910517 | 606 | struct drm_agp_mem *agp_entry; |
056219e2 | 607 | struct drm_buf *buf; |
1da177e4 LT |
608 | unsigned long offset; |
609 | unsigned long agp_offset; | |
610 | int count; | |
611 | int order; | |
612 | int size; | |
613 | int alignment; | |
614 | int page_order; | |
615 | int total; | |
616 | int byte_count; | |
54ba2f76 | 617 | int i, valid; |
056219e2 | 618 | struct drm_buf **temp_buflist; |
1da177e4 | 619 | |
b5e89ed5 DA |
620 | if (!dma) |
621 | return -EINVAL; | |
1da177e4 | 622 | |
d59431bf | 623 | count = request->count; |
04420c9c | 624 | order = order_base_2(request->size); |
1da177e4 LT |
625 | size = 1 << order; |
626 | ||
b5e89ed5 DA |
627 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
628 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
629 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
630 | total = PAGE_SIZE << page_order; | |
631 | ||
632 | byte_count = 0; | |
d59431bf | 633 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 634 | |
b5e89ed5 DA |
635 | DRM_DEBUG("count: %d\n", count); |
636 | DRM_DEBUG("order: %d\n", order); | |
637 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 638 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
639 | DRM_DEBUG("alignment: %d\n", alignment); |
640 | DRM_DEBUG("page_order: %d\n", page_order); | |
641 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 642 | |
b5e89ed5 DA |
643 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
644 | return -EINVAL; | |
1da177e4 | 645 | |
54ba2f76 DA |
646 | /* Make sure buffers are located in AGP memory that we own */ |
647 | valid = 0; | |
bd1b331f | 648 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
649 | if ((agp_offset >= agp_entry->bound) && |
650 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
651 | valid = 1; | |
652 | break; | |
653 | } | |
654 | } | |
bd1b331f | 655 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
656 | DRM_DEBUG("zone invalid\n"); |
657 | return -EINVAL; | |
658 | } | |
b5e89ed5 DA |
659 | spin_lock(&dev->count_lock); |
660 | if (dev->buf_use) { | |
661 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
662 | return -EBUSY; |
663 | } | |
b5e89ed5 DA |
664 | atomic_inc(&dev->buf_alloc); |
665 | spin_unlock(&dev->count_lock); | |
1da177e4 | 666 | |
30e2fb18 | 667 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 668 | entry = &dma->bufs[order]; |
b5e89ed5 | 669 | if (entry->buf_count) { |
30e2fb18 | 670 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
671 | atomic_dec(&dev->buf_alloc); |
672 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
673 | } |
674 | ||
675 | if (count < 0 || count > 4096) { | |
30e2fb18 | 676 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 677 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
678 | return -EINVAL; |
679 | } | |
680 | ||
94e3370e | 681 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 682 | if (!entry->buflist) { |
30e2fb18 | 683 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 684 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
685 | return -ENOMEM; |
686 | } | |
1da177e4 LT |
687 | |
688 | entry->buf_size = size; | |
689 | entry->page_order = page_order; | |
690 | ||
691 | offset = 0; | |
692 | ||
b5e89ed5 DA |
693 | while (entry->buf_count < count) { |
694 | buf = &entry->buflist[entry->buf_count]; | |
695 | buf->idx = dma->buf_count + entry->buf_count; | |
696 | buf->total = alignment; | |
697 | buf->order = order; | |
698 | buf->used = 0; | |
1da177e4 | 699 | |
b5e89ed5 | 700 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
701 | buf->bus_address = agp_offset + offset; |
702 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 703 | buf->next = NULL; |
1da177e4 LT |
704 | buf->waiting = 0; |
705 | buf->pending = 0; | |
6c340eac | 706 | buf->file_priv = NULL; |
1da177e4 LT |
707 | |
708 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 709 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 710 | if (!buf->dev_private) { |
1da177e4 LT |
711 | /* Set count correctly so we free the proper amount. */ |
712 | entry->buf_count = count; | |
b5e89ed5 | 713 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 714 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 715 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
716 | return -ENOMEM; |
717 | } | |
1da177e4 | 718 | |
b5e89ed5 | 719 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
720 | |
721 | offset += alignment; | |
722 | entry->buf_count++; | |
723 | byte_count += PAGE_SIZE << page_order; | |
724 | } | |
725 | ||
b5e89ed5 | 726 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 727 | |
9a298b2a EA |
728 | temp_buflist = krealloc(dma->buflist, |
729 | (dma->buf_count + entry->buf_count) * | |
730 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 731 | if (!temp_buflist) { |
1da177e4 | 732 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 733 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 734 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 735 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
736 | return -ENOMEM; |
737 | } | |
738 | dma->buflist = temp_buflist; | |
739 | ||
b5e89ed5 | 740 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
741 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
742 | } | |
743 | ||
744 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
745 | dma->seg_count += entry->seg_count; |
746 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
747 | dma->byte_count += byte_count; |
748 | ||
b5e89ed5 DA |
749 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
750 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 751 | |
30e2fb18 | 752 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 753 | |
d59431bf DA |
754 | request->count = entry->buf_count; |
755 | request->size = size; | |
1da177e4 LT |
756 | |
757 | dma->flags = _DRM_DMA_USE_AGP; | |
758 | ||
b5e89ed5 | 759 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
760 | return 0; |
761 | } | |
d84f76d3 | 762 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 763 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 764 | |
84b1fd10 | 765 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 766 | { |
cdd55a29 | 767 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
768 | int count; |
769 | int order; | |
770 | int size; | |
771 | int total; | |
772 | int page_order; | |
cdd55a29 | 773 | struct drm_buf_entry *entry; |
ddf19b97 | 774 | drm_dma_handle_t *dmah; |
056219e2 | 775 | struct drm_buf *buf; |
1da177e4 LT |
776 | int alignment; |
777 | unsigned long offset; | |
778 | int i; | |
779 | int byte_count; | |
780 | int page_count; | |
781 | unsigned long *temp_pagelist; | |
056219e2 | 782 | struct drm_buf **temp_buflist; |
1da177e4 | 783 | |
b5e89ed5 DA |
784 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
785 | return -EINVAL; | |
d985c108 | 786 | |
b5e89ed5 DA |
787 | if (!dma) |
788 | return -EINVAL; | |
1da177e4 | 789 | |
d985c108 DA |
790 | if (!capable(CAP_SYS_ADMIN)) |
791 | return -EPERM; | |
792 | ||
d59431bf | 793 | count = request->count; |
04420c9c | 794 | order = order_base_2(request->size); |
1da177e4 LT |
795 | size = 1 << order; |
796 | ||
a344a7e7 DV |
797 | DRM_DEBUG("count=%d, size=%d (%d), order=%d\n", |
798 | request->count, request->size, size, order); | |
1da177e4 | 799 | |
b5e89ed5 DA |
800 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
801 | return -EINVAL; | |
1da177e4 | 802 | |
d59431bf | 803 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 804 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
805 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
806 | total = PAGE_SIZE << page_order; | |
807 | ||
b5e89ed5 DA |
808 | spin_lock(&dev->count_lock); |
809 | if (dev->buf_use) { | |
810 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
811 | return -EBUSY; |
812 | } | |
b5e89ed5 DA |
813 | atomic_inc(&dev->buf_alloc); |
814 | spin_unlock(&dev->count_lock); | |
1da177e4 | 815 | |
30e2fb18 | 816 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 817 | entry = &dma->bufs[order]; |
b5e89ed5 | 818 | if (entry->buf_count) { |
30e2fb18 | 819 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 820 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
821 | return -ENOMEM; /* May only call once for each order */ |
822 | } | |
823 | ||
824 | if (count < 0 || count > 4096) { | |
30e2fb18 | 825 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 826 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
827 | return -EINVAL; |
828 | } | |
829 | ||
94e3370e | 830 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 831 | if (!entry->buflist) { |
30e2fb18 | 832 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 833 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
834 | return -ENOMEM; |
835 | } | |
b5e89ed5 | 836 | |
94e3370e | 837 | entry->seglist = kzalloc(count * sizeof(*entry->seglist), GFP_KERNEL); |
b5e89ed5 | 838 | if (!entry->seglist) { |
9a298b2a | 839 | kfree(entry->buflist); |
30e2fb18 | 840 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 841 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
842 | return -ENOMEM; |
843 | } | |
1da177e4 LT |
844 | |
845 | /* Keep the original pagelist until we know all the allocations | |
846 | * have succeeded | |
847 | */ | |
9a298b2a EA |
848 | temp_pagelist = kmalloc((dma->page_count + (count << page_order)) * |
849 | sizeof(*dma->pagelist), GFP_KERNEL); | |
1da177e4 | 850 | if (!temp_pagelist) { |
9a298b2a EA |
851 | kfree(entry->buflist); |
852 | kfree(entry->seglist); | |
30e2fb18 | 853 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 854 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
855 | return -ENOMEM; |
856 | } | |
857 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
858 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
859 | DRM_DEBUG("pagelist: %d entries\n", | |
860 | dma->page_count + (count << page_order)); | |
1da177e4 | 861 | |
b5e89ed5 | 862 | entry->buf_size = size; |
1da177e4 LT |
863 | entry->page_order = page_order; |
864 | byte_count = 0; | |
865 | page_count = 0; | |
866 | ||
b5e89ed5 | 867 | while (entry->buf_count < count) { |
bc5f4523 | 868 | |
e6be8d9d | 869 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000); |
bc5f4523 | 870 | |
ddf19b97 | 871 | if (!dmah) { |
1da177e4 LT |
872 | /* Set count correctly so we free the proper amount. */ |
873 | entry->buf_count = count; | |
874 | entry->seg_count = count; | |
875 | drm_cleanup_buf_error(dev, entry); | |
9a298b2a | 876 | kfree(temp_pagelist); |
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; | |
6c340eac | 903 | buf->file_priv = NULL; |
1da177e4 LT |
904 | |
905 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e DB |
906 | buf->dev_private = kzalloc(buf->dev_priv_size, |
907 | GFP_KERNEL); | |
b5e89ed5 | 908 | if (!buf->dev_private) { |
1da177e4 LT |
909 | /* Set count correctly so we free the proper amount. */ |
910 | entry->buf_count = count; | |
911 | entry->seg_count = count; | |
b5e89ed5 | 912 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 913 | kfree(temp_pagelist); |
30e2fb18 | 914 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 915 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
916 | return -ENOMEM; |
917 | } | |
1da177e4 | 918 | |
b5e89ed5 DA |
919 | DRM_DEBUG("buffer %d @ %p\n", |
920 | entry->buf_count, buf->address); | |
1da177e4 LT |
921 | } |
922 | byte_count += PAGE_SIZE << page_order; | |
923 | } | |
924 | ||
9a298b2a EA |
925 | temp_buflist = krealloc(dma->buflist, |
926 | (dma->buf_count + entry->buf_count) * | |
927 | sizeof(*dma->buflist), GFP_KERNEL); | |
1da177e4 LT |
928 | if (!temp_buflist) { |
929 | /* Free the entry because it isn't valid */ | |
b5e89ed5 | 930 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 931 | kfree(temp_pagelist); |
30e2fb18 | 932 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 933 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
934 | return -ENOMEM; |
935 | } | |
936 | dma->buflist = temp_buflist; | |
937 | ||
b5e89ed5 | 938 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
939 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
940 | } | |
941 | ||
88393161 | 942 | /* No allocations failed, so now we can replace the original pagelist |
1da177e4 LT |
943 | * with the new one. |
944 | */ | |
945 | if (dma->page_count) { | |
9a298b2a | 946 | kfree(dma->pagelist); |
1da177e4 LT |
947 | } |
948 | dma->pagelist = temp_pagelist; | |
949 | ||
950 | dma->buf_count += entry->buf_count; | |
951 | dma->seg_count += entry->seg_count; | |
952 | dma->page_count += entry->seg_count << page_order; | |
953 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
954 | ||
30e2fb18 | 955 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 956 | |
d59431bf DA |
957 | request->count = entry->buf_count; |
958 | request->size = size; | |
1da177e4 | 959 | |
3417f33e GS |
960 | if (request->flags & _DRM_PCI_BUFFER_RO) |
961 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
962 | ||
b5e89ed5 | 963 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
964 | return 0; |
965 | ||
966 | } | |
d84f76d3 | 967 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 968 | |
84b1fd10 | 969 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 970 | { |
cdd55a29 DA |
971 | struct drm_device_dma *dma = dev->dma; |
972 | struct drm_buf_entry *entry; | |
056219e2 | 973 | struct drm_buf *buf; |
1da177e4 LT |
974 | unsigned long offset; |
975 | unsigned long agp_offset; | |
976 | int count; | |
977 | int order; | |
978 | int size; | |
979 | int alignment; | |
980 | int page_order; | |
981 | int total; | |
982 | int byte_count; | |
983 | int i; | |
056219e2 | 984 | struct drm_buf **temp_buflist; |
1da177e4 | 985 | |
b5e89ed5 DA |
986 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
987 | return -EINVAL; | |
988 | ||
989 | if (!dma) | |
990 | return -EINVAL; | |
1da177e4 | 991 | |
d985c108 DA |
992 | if (!capable(CAP_SYS_ADMIN)) |
993 | return -EPERM; | |
994 | ||
d59431bf | 995 | count = request->count; |
04420c9c | 996 | order = order_base_2(request->size); |
1da177e4 LT |
997 | size = 1 << order; |
998 | ||
b5e89ed5 DA |
999 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
1000 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
1001 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
1002 | total = PAGE_SIZE << page_order; | |
1003 | ||
1004 | byte_count = 0; | |
d59431bf | 1005 | agp_offset = request->agp_start; |
1da177e4 | 1006 | |
b5e89ed5 DA |
1007 | DRM_DEBUG("count: %d\n", count); |
1008 | DRM_DEBUG("order: %d\n", order); | |
1009 | DRM_DEBUG("size: %d\n", size); | |
1010 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1011 | DRM_DEBUG("alignment: %d\n", alignment); | |
1012 | DRM_DEBUG("page_order: %d\n", page_order); | |
1013 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1014 | |
b5e89ed5 DA |
1015 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1016 | return -EINVAL; | |
1da177e4 | 1017 | |
b5e89ed5 DA |
1018 | spin_lock(&dev->count_lock); |
1019 | if (dev->buf_use) { | |
1020 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1021 | return -EBUSY; |
1022 | } | |
b5e89ed5 DA |
1023 | atomic_inc(&dev->buf_alloc); |
1024 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1025 | |
30e2fb18 | 1026 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1027 | entry = &dma->bufs[order]; |
b5e89ed5 | 1028 | if (entry->buf_count) { |
30e2fb18 | 1029 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1030 | atomic_dec(&dev->buf_alloc); |
1031 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1032 | } |
1033 | ||
1034 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1035 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1036 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1037 | return -EINVAL; |
1038 | } | |
1039 | ||
94e3370e | 1040 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1041 | GFP_KERNEL); |
b5e89ed5 | 1042 | if (!entry->buflist) { |
30e2fb18 | 1043 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1044 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1045 | return -ENOMEM; |
1046 | } | |
1da177e4 LT |
1047 | |
1048 | entry->buf_size = size; | |
1049 | entry->page_order = page_order; | |
1050 | ||
1051 | offset = 0; | |
1052 | ||
b5e89ed5 DA |
1053 | while (entry->buf_count < count) { |
1054 | buf = &entry->buflist[entry->buf_count]; | |
1055 | buf->idx = dma->buf_count + entry->buf_count; | |
1056 | buf->total = alignment; | |
1057 | buf->order = order; | |
1058 | buf->used = 0; | |
1da177e4 | 1059 | |
b5e89ed5 | 1060 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1061 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1062 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1063 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1064 | buf->next = NULL; |
1da177e4 LT |
1065 | buf->waiting = 0; |
1066 | buf->pending = 0; | |
6c340eac | 1067 | buf->file_priv = NULL; |
1da177e4 LT |
1068 | |
1069 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1070 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 1071 | if (!buf->dev_private) { |
1da177e4 LT |
1072 | /* Set count correctly so we free the proper amount. */ |
1073 | entry->buf_count = count; | |
b5e89ed5 | 1074 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1075 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1076 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1077 | return -ENOMEM; |
1078 | } | |
1079 | ||
b5e89ed5 | 1080 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1081 | |
1082 | offset += alignment; | |
1083 | entry->buf_count++; | |
1084 | byte_count += PAGE_SIZE << page_order; | |
1085 | } | |
1086 | ||
b5e89ed5 | 1087 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1088 | |
9a298b2a EA |
1089 | temp_buflist = krealloc(dma->buflist, |
1090 | (dma->buf_count + entry->buf_count) * | |
1091 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 1092 | if (!temp_buflist) { |
1da177e4 | 1093 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1094 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1095 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1096 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1097 | return -ENOMEM; |
1098 | } | |
1099 | dma->buflist = temp_buflist; | |
1100 | ||
b5e89ed5 | 1101 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1102 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1103 | } | |
1104 | ||
1105 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1106 | dma->seg_count += entry->seg_count; |
1107 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1108 | dma->byte_count += byte_count; |
1109 | ||
b5e89ed5 DA |
1110 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1111 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1112 | |
30e2fb18 | 1113 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1114 | |
d59431bf DA |
1115 | request->count = entry->buf_count; |
1116 | request->size = size; | |
1da177e4 LT |
1117 | |
1118 | dma->flags = _DRM_DMA_USE_SG; | |
1119 | ||
b5e89ed5 | 1120 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1121 | return 0; |
1122 | } | |
1123 | ||
1124 | /** | |
1125 | * Add buffers for DMA transfers (ioctl). | |
1126 | * | |
1127 | * \param inode device inode. | |
6c340eac | 1128 | * \param file_priv DRM file private. |
1da177e4 | 1129 | * \param cmd command. |
c60ce623 | 1130 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1131 | * \return zero on success or a negative number on failure. |
1132 | * | |
1133 | * According with the memory type specified in drm_buf_desc::flags and the | |
1134 | * build options, it dispatches the call either to addbufs_agp(), | |
1135 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1136 | * PCI memory respectively. | |
1137 | */ | |
c153f45f EA |
1138 | int drm_addbufs(struct drm_device *dev, void *data, |
1139 | struct drm_file *file_priv) | |
1da177e4 | 1140 | { |
c153f45f | 1141 | struct drm_buf_desc *request = data; |
d59431bf | 1142 | int ret; |
b5e89ed5 | 1143 | |
8d38c4b4 DV |
1144 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1145 | return -EINVAL; | |
1146 | ||
1da177e4 LT |
1147 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1148 | return -EINVAL; | |
1149 | ||
1da177e4 | 1150 | #if __OS_HAS_AGP |
c153f45f EA |
1151 | if (request->flags & _DRM_AGP_BUFFER) |
1152 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1153 | else |
1154 | #endif | |
c153f45f EA |
1155 | if (request->flags & _DRM_SG_BUFFER) |
1156 | ret = drm_addbufs_sg(dev, request); | |
1157 | else if (request->flags & _DRM_FB_BUFFER) | |
687fbb2e | 1158 | ret = -EINVAL; |
1da177e4 | 1159 | else |
c153f45f | 1160 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1161 | |
d59431bf | 1162 | return ret; |
1da177e4 LT |
1163 | } |
1164 | ||
1da177e4 LT |
1165 | /** |
1166 | * Get information about the buffer mappings. | |
1167 | * | |
1168 | * This was originally mean for debugging purposes, or by a sophisticated | |
1169 | * client library to determine how best to use the available buffers (e.g., | |
1170 | * large buffers can be used for image transfer). | |
1171 | * | |
1172 | * \param inode device inode. | |
6c340eac | 1173 | * \param file_priv DRM file private. |
1da177e4 LT |
1174 | * \param cmd command. |
1175 | * \param arg pointer to a drm_buf_info structure. | |
1176 | * \return zero on success or a negative number on failure. | |
1177 | * | |
1178 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1179 | * lock, preventing of allocating more buffers after this call. Information | |
1180 | * about each requested buffer is then copied into user space. | |
1181 | */ | |
c153f45f EA |
1182 | int drm_infobufs(struct drm_device *dev, void *data, |
1183 | struct drm_file *file_priv) | |
1da177e4 | 1184 | { |
cdd55a29 | 1185 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1186 | struct drm_buf_info *request = data; |
1da177e4 LT |
1187 | int i; |
1188 | int count; | |
1189 | ||
8d38c4b4 DV |
1190 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1191 | return -EINVAL; | |
1192 | ||
1da177e4 LT |
1193 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1194 | return -EINVAL; | |
1195 | ||
b5e89ed5 DA |
1196 | if (!dma) |
1197 | return -EINVAL; | |
1da177e4 | 1198 | |
b5e89ed5 DA |
1199 | spin_lock(&dev->count_lock); |
1200 | if (atomic_read(&dev->buf_alloc)) { | |
1201 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1202 | return -EBUSY; |
1203 | } | |
1204 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1205 | spin_unlock(&dev->count_lock); |
1da177e4 | 1206 | |
b5e89ed5 DA |
1207 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1208 | if (dma->bufs[i].buf_count) | |
1209 | ++count; | |
1da177e4 LT |
1210 | } |
1211 | ||
b5e89ed5 | 1212 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1213 | |
c153f45f | 1214 | if (request->count >= count) { |
b5e89ed5 DA |
1215 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1216 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1217 | struct drm_buf_desc __user *to = |
c153f45f | 1218 | &request->list[count]; |
cdd55a29 DA |
1219 | struct drm_buf_entry *from = &dma->bufs[i]; |
1220 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1221 | if (copy_to_user(&to->count, |
1222 | &from->buf_count, | |
1223 | sizeof(from->buf_count)) || | |
1224 | copy_to_user(&to->size, | |
1225 | &from->buf_size, | |
1226 | sizeof(from->buf_size)) || | |
1227 | copy_to_user(&to->low_mark, | |
1228 | &list->low_mark, | |
1229 | sizeof(list->low_mark)) || | |
1230 | copy_to_user(&to->high_mark, | |
1231 | &list->high_mark, | |
1232 | sizeof(list->high_mark))) | |
1da177e4 LT |
1233 | return -EFAULT; |
1234 | ||
b5e89ed5 DA |
1235 | DRM_DEBUG("%d %d %d %d %d\n", |
1236 | i, | |
1237 | dma->bufs[i].buf_count, | |
1238 | dma->bufs[i].buf_size, | |
1239 | dma->bufs[i].freelist.low_mark, | |
1240 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1241 | ++count; |
1242 | } | |
1243 | } | |
1244 | } | |
c153f45f | 1245 | request->count = count; |
1da177e4 LT |
1246 | |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | /** | |
1251 | * Specifies a low and high water mark for buffer allocation | |
1252 | * | |
1253 | * \param inode device inode. | |
6c340eac | 1254 | * \param file_priv DRM file private. |
1da177e4 LT |
1255 | * \param cmd command. |
1256 | * \param arg a pointer to a drm_buf_desc structure. | |
1257 | * \return zero on success or a negative number on failure. | |
1258 | * | |
1259 | * Verifies that the size order is bounded between the admissible orders and | |
1260 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1261 | * | |
1262 | * \note This ioctl is deprecated and mostly never used. | |
1263 | */ | |
c153f45f EA |
1264 | int drm_markbufs(struct drm_device *dev, void *data, |
1265 | struct drm_file *file_priv) | |
1da177e4 | 1266 | { |
cdd55a29 | 1267 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1268 | struct drm_buf_desc *request = data; |
1da177e4 | 1269 | int order; |
cdd55a29 | 1270 | struct drm_buf_entry *entry; |
1da177e4 | 1271 | |
8d38c4b4 DV |
1272 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1273 | return -EINVAL; | |
1274 | ||
1da177e4 LT |
1275 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1276 | return -EINVAL; | |
1277 | ||
b5e89ed5 DA |
1278 | if (!dma) |
1279 | return -EINVAL; | |
1da177e4 | 1280 | |
b5e89ed5 | 1281 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f | 1282 | request->size, request->low_mark, request->high_mark); |
04420c9c | 1283 | order = order_base_2(request->size); |
b5e89ed5 DA |
1284 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1285 | return -EINVAL; | |
1da177e4 LT |
1286 | entry = &dma->bufs[order]; |
1287 | ||
c153f45f | 1288 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1289 | return -EINVAL; |
c153f45f | 1290 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1291 | return -EINVAL; |
1292 | ||
c153f45f EA |
1293 | entry->freelist.low_mark = request->low_mark; |
1294 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1295 | |
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | /** | |
b5e89ed5 | 1300 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1301 | * |
1302 | * \param inode device inode. | |
6c340eac | 1303 | * \param file_priv DRM file private. |
1da177e4 LT |
1304 | * \param cmd command. |
1305 | * \param arg pointer to a drm_buf_free structure. | |
1306 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1307 | * |
1da177e4 LT |
1308 | * Calls free_buffer() for each used buffer. |
1309 | * This function is primarily used for debugging. | |
1310 | */ | |
c153f45f EA |
1311 | int drm_freebufs(struct drm_device *dev, void *data, |
1312 | struct drm_file *file_priv) | |
1da177e4 | 1313 | { |
cdd55a29 | 1314 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1315 | struct drm_buf_free *request = data; |
1da177e4 LT |
1316 | int i; |
1317 | int idx; | |
056219e2 | 1318 | struct drm_buf *buf; |
1da177e4 | 1319 | |
8d38c4b4 DV |
1320 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1321 | return -EINVAL; | |
1322 | ||
1da177e4 LT |
1323 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1324 | return -EINVAL; | |
1325 | ||
b5e89ed5 DA |
1326 | if (!dma) |
1327 | return -EINVAL; | |
1da177e4 | 1328 | |
c153f45f EA |
1329 | DRM_DEBUG("%d\n", request->count); |
1330 | for (i = 0; i < request->count; i++) { | |
1331 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1332 | return -EFAULT; |
b5e89ed5 DA |
1333 | if (idx < 0 || idx >= dma->buf_count) { |
1334 | DRM_ERROR("Index %d (of %d max)\n", | |
1335 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1336 | return -EINVAL; |
1337 | } | |
1338 | buf = dma->buflist[idx]; | |
6c340eac | 1339 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1340 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1341 | task_pid_nr(current)); |
1da177e4 LT |
1342 | return -EINVAL; |
1343 | } | |
b5e89ed5 | 1344 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1345 | } |
1346 | ||
1347 | return 0; | |
1348 | } | |
1349 | ||
1350 | /** | |
1351 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1352 | * | |
1353 | * \param inode device inode. | |
6c340eac | 1354 | * \param file_priv DRM file private. |
1da177e4 LT |
1355 | * \param cmd command. |
1356 | * \param arg pointer to a drm_buf_map structure. | |
1357 | * \return zero on success or a negative number on failure. | |
1358 | * | |
6be5ceb0 LT |
1359 | * Maps the AGP, SG or PCI buffer region with vm_mmap(), and copies information |
1360 | * about each buffer into user space. For PCI buffers, it calls vm_mmap() with | |
3417f33e GS |
1361 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls |
1362 | * drm_mmap_dma(). | |
1da177e4 | 1363 | */ |
c153f45f EA |
1364 | int drm_mapbufs(struct drm_device *dev, void *data, |
1365 | struct drm_file *file_priv) | |
1da177e4 | 1366 | { |
cdd55a29 | 1367 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1368 | int retcode = 0; |
1369 | const int zero = 0; | |
1370 | unsigned long virtual; | |
1371 | unsigned long address; | |
c153f45f | 1372 | struct drm_buf_map *request = data; |
1da177e4 LT |
1373 | int i; |
1374 | ||
8d38c4b4 DV |
1375 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1376 | return -EINVAL; | |
1377 | ||
1da177e4 LT |
1378 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1379 | return -EINVAL; | |
1380 | ||
b5e89ed5 DA |
1381 | if (!dma) |
1382 | return -EINVAL; | |
1da177e4 | 1383 | |
b5e89ed5 DA |
1384 | spin_lock(&dev->count_lock); |
1385 | if (atomic_read(&dev->buf_alloc)) { | |
1386 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1387 | return -EBUSY; |
1388 | } | |
1389 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1390 | spin_unlock(&dev->count_lock); |
1da177e4 | 1391 | |
c153f45f | 1392 | if (request->count >= dma->buf_count) { |
d9906753 | 1393 | if ((dev->agp && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1394 | || (drm_core_check_feature(dev, DRIVER_SG) |
687fbb2e | 1395 | && (dma->flags & _DRM_DMA_USE_SG))) { |
f77d390c | 1396 | struct drm_local_map *map = dev->agp_buffer_map; |
d1f2b55a | 1397 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1398 | |
b5e89ed5 | 1399 | if (!map) { |
1da177e4 LT |
1400 | retcode = -EINVAL; |
1401 | goto done; | |
1402 | } | |
6be5ceb0 | 1403 | virtual = vm_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1404 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1405 | MAP_SHARED, |
1406 | token); | |
1da177e4 | 1407 | } else { |
6be5ceb0 | 1408 | virtual = vm_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1409 | PROT_READ | PROT_WRITE, |
1410 | MAP_SHARED, 0); | |
1da177e4 | 1411 | } |
b5e89ed5 | 1412 | if (virtual > -1024UL) { |
1da177e4 LT |
1413 | /* Real error */ |
1414 | retcode = (signed long)virtual; | |
1415 | goto done; | |
1416 | } | |
c153f45f | 1417 | request->virtual = (void __user *)virtual; |
1da177e4 | 1418 | |
b5e89ed5 | 1419 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1420 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1421 | &dma->buflist[i]->idx, |
c153f45f | 1422 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1423 | retcode = -EFAULT; |
1424 | goto done; | |
1425 | } | |
c153f45f | 1426 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1427 | &dma->buflist[i]->total, |
c153f45f | 1428 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1429 | retcode = -EFAULT; |
1430 | goto done; | |
1431 | } | |
c153f45f | 1432 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1433 | &zero, sizeof(zero))) { |
1da177e4 LT |
1434 | retcode = -EFAULT; |
1435 | goto done; | |
1436 | } | |
b5e89ed5 | 1437 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1438 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1439 | &address, sizeof(address))) { |
1da177e4 LT |
1440 | retcode = -EFAULT; |
1441 | goto done; | |
1442 | } | |
1443 | } | |
1444 | } | |
b5e89ed5 | 1445 | done: |
c153f45f EA |
1446 | request->count = dma->buf_count; |
1447 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1448 | |
1449 | return retcode; | |
1450 | } | |
1451 | ||
6eb9278a DV |
1452 | int drm_dma_ioctl(struct drm_device *dev, void *data, |
1453 | struct drm_file *file_priv) | |
1454 | { | |
1455 | if (drm_core_check_feature(dev, DRIVER_MODESET)) | |
1456 | return -EINVAL; | |
1457 | ||
1458 | if (dev->driver->dma_ioctl) | |
1459 | return dev->driver->dma_ioctl(dev, data, file_priv); | |
1460 | else | |
1461 | return -EINVAL; | |
1462 | } | |
1463 | ||
bd0c0cee DV |
1464 | struct drm_local_map *drm_getsarea(struct drm_device *dev) |
1465 | { | |
1466 | struct drm_map_list *entry; | |
1467 | ||
1468 | list_for_each_entry(entry, &dev->maplist, head) { | |
1469 | if (entry->map && entry->map->type == _DRM_SHM && | |
1470 | (entry->map->flags & _DRM_CONTAINS_LOCK)) { | |
1471 | return entry->map; | |
1472 | } | |
1473 | } | |
1474 | return NULL; | |
1475 | } | |
1476 | EXPORT_SYMBOL(drm_getsarea); |