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> | |
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 | ||
1da177e4 | 210 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
211 | if (map->type == _DRM_FRAME_BUFFER || |
212 | (map->flags & _DRM_WRITE_COMBINING)) { | |
ff47eaf2 AL |
213 | map->mtrr = |
214 | arch_phys_wc_add(map->offset, map->size); | |
1da177e4 LT |
215 | } |
216 | } | |
0769d39c | 217 | if (map->type == _DRM_REGISTERS) { |
ff47eaf2 AL |
218 | if (map->flags & _DRM_WRITE_COMBINING) |
219 | map->handle = ioremap_wc(map->offset, | |
220 | map->size); | |
221 | else | |
222 | map->handle = ioremap(map->offset, map->size); | |
0769d39c | 223 | if (!map->handle) { |
9a298b2a | 224 | kfree(map); |
0769d39c ST |
225 | return -ENOMEM; |
226 | } | |
227 | } | |
bc5f4523 | 228 | |
1da177e4 | 229 | break; |
1da177e4 | 230 | case _DRM_SHM: |
54ba2f76 DA |
231 | list = drm_find_matching_map(dev, map); |
232 | if (list != NULL) { | |
233 | if(list->map->size != map->size) { | |
234 | DRM_DEBUG("Matching maps of type %d with " | |
235 | "mismatched sizes, (%ld vs %ld)\n", | |
236 | map->type, map->size, list->map->size); | |
237 | list->map->size = map->size; | |
238 | } | |
239 | ||
9a298b2a | 240 | kfree(map); |
54ba2f76 DA |
241 | *maplist = list; |
242 | return 0; | |
243 | } | |
f239b7b0 | 244 | map->handle = vmalloc_user(map->size); |
b5e89ed5 | 245 | DRM_DEBUG("%lu %d %p\n", |
04420c9c | 246 | map->size, order_base_2(map->size), map->handle); |
b5e89ed5 | 247 | if (!map->handle) { |
9a298b2a | 248 | kfree(map); |
1da177e4 LT |
249 | return -ENOMEM; |
250 | } | |
251 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 252 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 253 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
7c1c2871 | 254 | if (dev->primary->master->lock.hw_lock != NULL) { |
b5e89ed5 | 255 | vfree(map->handle); |
9a298b2a | 256 | kfree(map); |
1da177e4 LT |
257 | return -EBUSY; |
258 | } | |
7c1c2871 | 259 | dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
260 | } |
261 | break; | |
54ba2f76 | 262 | case _DRM_AGP: { |
55910517 | 263 | struct drm_agp_mem *entry; |
54ba2f76 DA |
264 | int valid = 0; |
265 | ||
266 | if (!drm_core_has_AGP(dev)) { | |
9a298b2a | 267 | kfree(map); |
54ba2f76 DA |
268 | return -EINVAL; |
269 | } | |
1da177e4 | 270 | #ifdef __alpha__ |
54ba2f76 | 271 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 272 | #endif |
47a184a8 EA |
273 | /* In some cases (i810 driver), user space may have already |
274 | * added the AGP base itself, because dev->agp->base previously | |
275 | * only got set during AGP enable. So, only add the base | |
276 | * address if the map's offset isn't already within the | |
277 | * aperture. | |
54ba2f76 | 278 | */ |
47a184a8 EA |
279 | if (map->offset < dev->agp->base || |
280 | map->offset > dev->agp->base + | |
281 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
282 | map->offset += dev->agp->base; | |
283 | } | |
54ba2f76 DA |
284 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
285 | ||
286 | /* This assumes the DRM is in total control of AGP space. | |
287 | * It's not always the case as AGP can be in the control | |
288 | * of user space (i.e. i810 driver). So this loop will get | |
289 | * skipped and we double check that dev->agp->memory is | |
290 | * actually set as well as being invalid before EPERM'ing | |
291 | */ | |
bd1b331f | 292 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
293 | if ((map->offset >= entry->bound) && |
294 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
295 | valid = 1; | |
296 | break; | |
297 | } | |
1da177e4 | 298 | } |
bd1b331f | 299 | if (!list_empty(&dev->agp->memory) && !valid) { |
9a298b2a | 300 | kfree(map); |
54ba2f76 DA |
301 | return -EPERM; |
302 | } | |
41c2e75e BH |
303 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
304 | (unsigned long long)map->offset, map->size); | |
54ba2f76 | 305 | |
a2c0a97b | 306 | break; |
812c369d | 307 | } |
a2c0a97b | 308 | case _DRM_GEM: |
812c369d | 309 | DRM_ERROR("tried to addmap GEM object\n"); |
1da177e4 LT |
310 | break; |
311 | case _DRM_SCATTER_GATHER: | |
312 | if (!dev->sg) { | |
9a298b2a | 313 | kfree(map); |
1da177e4 LT |
314 | return -EINVAL; |
315 | } | |
d1f2b55a | 316 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 317 | break; |
b5e89ed5 | 318 | case _DRM_CONSISTENT: |
2d0f9eaf | 319 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 320 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
321 | * casting it down to 32 bits is no problem, but we |
322 | * need to point to a 64bit variable first. */ | |
e6be8d9d | 323 | dmah = drm_pci_alloc(dev, map->size, map->size); |
9c8da5eb | 324 | if (!dmah) { |
9a298b2a | 325 | kfree(map); |
2d0f9eaf DA |
326 | return -ENOMEM; |
327 | } | |
9c8da5eb DA |
328 | map->handle = dmah->vaddr; |
329 | map->offset = (unsigned long)dmah->busaddr; | |
330 | kfree(dmah); | |
2d0f9eaf | 331 | break; |
1da177e4 | 332 | default: |
9a298b2a | 333 | kfree(map); |
1da177e4 LT |
334 | return -EINVAL; |
335 | } | |
336 | ||
94e3370e | 337 | list = kzalloc(sizeof(*list), GFP_KERNEL); |
b5e89ed5 | 338 | if (!list) { |
85abb3f9 | 339 | if (map->type == _DRM_REGISTERS) |
004a7727 | 340 | iounmap(map->handle); |
9a298b2a | 341 | kfree(map); |
1da177e4 LT |
342 | return -EINVAL; |
343 | } | |
1da177e4 LT |
344 | list->map = map; |
345 | ||
30e2fb18 | 346 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 347 | list_add(&list->head, &dev->maplist); |
8d153f71 | 348 | |
d1f2b55a | 349 | /* Assign a 32-bit handle */ |
30e2fb18 | 350 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
351 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
352 | map->offset; | |
f1a2a9b6 DM |
353 | ret = drm_map_handle(dev, &list->hash, user_token, 0, |
354 | (map->type == _DRM_SHM)); | |
8d153f71 | 355 | if (ret) { |
85abb3f9 | 356 | if (map->type == _DRM_REGISTERS) |
004a7727 | 357 | iounmap(map->handle); |
9a298b2a EA |
358 | kfree(map); |
359 | kfree(list); | |
8d153f71 TH |
360 | mutex_unlock(&dev->struct_mutex); |
361 | return ret; | |
362 | } | |
363 | ||
1545085a | 364 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 365 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 366 | |
2ff2e8a3 BS |
367 | if (!(map->flags & _DRM_DRIVER)) |
368 | list->master = dev->primary->master; | |
89625eb1 | 369 | *maplist = list; |
7ab98401 | 370 | return 0; |
54ba2f76 | 371 | } |
89625eb1 | 372 | |
41c2e75e | 373 | int drm_addmap(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 374 | unsigned int size, enum drm_map_type type, |
f77d390c | 375 | enum drm_map_flags flags, struct drm_local_map ** map_ptr) |
89625eb1 | 376 | { |
55910517 | 377 | struct drm_map_list *list; |
89625eb1 DA |
378 | int rc; |
379 | ||
380 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
381 | if (!rc) | |
382 | *map_ptr = list->map; | |
383 | return rc; | |
384 | } | |
b5e89ed5 | 385 | |
7ab98401 DA |
386 | EXPORT_SYMBOL(drm_addmap); |
387 | ||
f77d390c BH |
388 | /** |
389 | * Ioctl to specify a range of memory that is available for mapping by a | |
390 | * non-root process. | |
391 | * | |
392 | * \param inode device inode. | |
393 | * \param file_priv DRM file private. | |
394 | * \param cmd command. | |
395 | * \param arg pointer to a drm_map structure. | |
396 | * \return zero on success or a negative value on error. | |
397 | * | |
398 | */ | |
c153f45f EA |
399 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
400 | struct drm_file *file_priv) | |
7ab98401 | 401 | { |
c153f45f | 402 | struct drm_map *map = data; |
55910517 | 403 | struct drm_map_list *maplist; |
7ab98401 DA |
404 | int err; |
405 | ||
7c1c2871 | 406 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
407 | return -EPERM; |
408 | ||
c153f45f EA |
409 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
410 | map->flags, &maplist); | |
7ab98401 | 411 | |
b5e89ed5 | 412 | if (err) |
7ab98401 | 413 | return err; |
d1f2b55a | 414 | |
67e1a014 | 415 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 416 | map->handle = (void *)(unsigned long)maplist->user_token; |
0dd99f1b AL |
417 | |
418 | /* | |
419 | * It appears that there are no users of this value whatsoever -- | |
420 | * drmAddMap just discards it. Let's not encourage its use. | |
421 | * (Keeping drm_addmap_core's returned mtrr value would be wrong -- | |
422 | * it's not a real mtrr index anymore.) | |
423 | */ | |
424 | map->mtrr = -1; | |
425 | ||
1da177e4 | 426 | return 0; |
88f399cd | 427 | } |
1da177e4 | 428 | |
1da177e4 LT |
429 | /** |
430 | * Remove a map private from list and deallocate resources if the mapping | |
431 | * isn't in use. | |
432 | * | |
1da177e4 LT |
433 | * Searches the map on drm_device::maplist, removes it from the list, see if |
434 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
435 | * being on use. | |
436 | * | |
7ab98401 | 437 | * \sa drm_addmap |
1da177e4 | 438 | */ |
f77d390c | 439 | int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 440 | { |
55910517 | 441 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 442 | drm_dma_handle_t dmah; |
bd1b331f | 443 | int found = 0; |
7c1c2871 | 444 | struct drm_master *master; |
1da177e4 | 445 | |
836cf046 | 446 | /* Find the list entry for the map and remove it */ |
bd1b331f | 447 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 448 | if (r_list->map == map) { |
7c1c2871 | 449 | master = r_list->master; |
bd1b331f | 450 | list_del(&r_list->head); |
1545085a TH |
451 | drm_ht_remove_key(&dev->map_hash, |
452 | r_list->user_token >> PAGE_SHIFT); | |
9a298b2a | 453 | kfree(r_list); |
bd1b331f | 454 | found = 1; |
836cf046 DA |
455 | break; |
456 | } | |
1da177e4 LT |
457 | } |
458 | ||
bd1b331f | 459 | if (!found) |
1da177e4 | 460 | return -EINVAL; |
1da177e4 | 461 | |
836cf046 DA |
462 | switch (map->type) { |
463 | case _DRM_REGISTERS: | |
004a7727 | 464 | iounmap(map->handle); |
836cf046 DA |
465 | /* FALLTHROUGH */ |
466 | case _DRM_FRAME_BUFFER: | |
ff47eaf2 AL |
467 | if (drm_core_has_MTRR(dev)) |
468 | arch_phys_wc_del(map->mtrr); | |
836cf046 DA |
469 | break; |
470 | case _DRM_SHM: | |
471 | vfree(map->handle); | |
7c1c2871 DA |
472 | if (master) { |
473 | if (dev->sigdata.lock == master->lock.hw_lock) | |
474 | dev->sigdata.lock = NULL; | |
475 | master->lock.hw_lock = NULL; /* SHM removed */ | |
476 | master->lock.file_priv = NULL; | |
171901d1 | 477 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 478 | } |
836cf046 DA |
479 | break; |
480 | case _DRM_AGP: | |
481 | case _DRM_SCATTER_GATHER: | |
482 | break; | |
483 | case _DRM_CONSISTENT: | |
484 | dmah.vaddr = map->handle; | |
485 | dmah.busaddr = map->offset; | |
486 | dmah.size = map->size; | |
487 | __drm_pci_free(dev, &dmah); | |
488 | break; | |
a2c0a97b JB |
489 | case _DRM_GEM: |
490 | DRM_ERROR("tried to rmmap GEM object\n"); | |
491 | break; | |
1da177e4 | 492 | } |
9a298b2a | 493 | kfree(map); |
836cf046 | 494 | |
1da177e4 LT |
495 | return 0; |
496 | } | |
4e74f36d | 497 | EXPORT_SYMBOL(drm_rmmap_locked); |
836cf046 | 498 | |
f77d390c | 499 | int drm_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 DA |
500 | { |
501 | int ret; | |
502 | ||
30e2fb18 | 503 | mutex_lock(&dev->struct_mutex); |
836cf046 | 504 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 505 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
506 | |
507 | return ret; | |
508 | } | |
ba8bbcf6 | 509 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 510 | |
836cf046 DA |
511 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
512 | * the last close of the device, and this is necessary for cleanup when things | |
513 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
514 | * like a pointless exercise since they're going away anyway. | |
515 | * | |
516 | * One use case might be after addmap is allowed for normal users for SHM and | |
517 | * gets used by drivers that the server doesn't need to care about. This seems | |
518 | * unlikely. | |
f77d390c BH |
519 | * |
520 | * \param inode device inode. | |
521 | * \param file_priv DRM file private. | |
522 | * \param cmd command. | |
523 | * \param arg pointer to a struct drm_map structure. | |
524 | * \return zero on success or a negative value on error. | |
836cf046 | 525 | */ |
c153f45f EA |
526 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
527 | struct drm_file *file_priv) | |
7ab98401 | 528 | { |
c153f45f | 529 | struct drm_map *request = data; |
f77d390c | 530 | struct drm_local_map *map = NULL; |
55910517 | 531 | struct drm_map_list *r_list; |
836cf046 | 532 | int ret; |
7ab98401 | 533 | |
30e2fb18 | 534 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 535 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 536 | if (r_list->map && |
c153f45f | 537 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
538 | r_list->map->flags & _DRM_REMOVABLE) { |
539 | map = r_list->map; | |
540 | break; | |
541 | } | |
542 | } | |
543 | ||
544 | /* List has wrapped around to the head pointer, or its empty we didn't | |
545 | * find anything. | |
546 | */ | |
bd1b331f | 547 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 548 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
549 | return -EINVAL; |
550 | } | |
551 | ||
836cf046 DA |
552 | /* Register and framebuffer maps are permanent */ |
553 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 554 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
555 | return 0; |
556 | } | |
557 | ||
558 | ret = drm_rmmap_locked(dev, map); | |
559 | ||
30e2fb18 | 560 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
561 | |
562 | return ret; | |
7ab98401 | 563 | } |
1da177e4 LT |
564 | |
565 | /** | |
566 | * Cleanup after an error on one of the addbufs() functions. | |
567 | * | |
836cf046 | 568 | * \param dev DRM device. |
1da177e4 LT |
569 | * \param entry buffer entry where the error occurred. |
570 | * | |
571 | * Frees any pages and buffers associated with the given entry. | |
572 | */ | |
cdd55a29 DA |
573 | static void drm_cleanup_buf_error(struct drm_device * dev, |
574 | struct drm_buf_entry * entry) | |
1da177e4 LT |
575 | { |
576 | int i; | |
577 | ||
578 | if (entry->seg_count) { | |
579 | for (i = 0; i < entry->seg_count; i++) { | |
580 | if (entry->seglist[i]) { | |
ddf19b97 | 581 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
582 | } |
583 | } | |
9a298b2a | 584 | kfree(entry->seglist); |
1da177e4 LT |
585 | |
586 | entry->seg_count = 0; | |
587 | } | |
588 | ||
b5e89ed5 DA |
589 | if (entry->buf_count) { |
590 | for (i = 0; i < entry->buf_count; i++) { | |
9a298b2a | 591 | kfree(entry->buflist[i].dev_private); |
1da177e4 | 592 | } |
9a298b2a | 593 | kfree(entry->buflist); |
1da177e4 LT |
594 | |
595 | entry->buf_count = 0; | |
596 | } | |
597 | } | |
598 | ||
599 | #if __OS_HAS_AGP | |
600 | /** | |
d59431bf | 601 | * Add AGP buffers for DMA transfers. |
1da177e4 | 602 | * |
84b1fd10 | 603 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 604 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 605 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 606 | * |
1da177e4 LT |
607 | * After some sanity checks creates a drm_buf structure for each buffer and |
608 | * reallocates the buffer list of the same size order to accommodate the new | |
609 | * buffers. | |
610 | */ | |
84b1fd10 | 611 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 612 | { |
cdd55a29 DA |
613 | struct drm_device_dma *dma = dev->dma; |
614 | struct drm_buf_entry *entry; | |
55910517 | 615 | struct drm_agp_mem *agp_entry; |
056219e2 | 616 | struct drm_buf *buf; |
1da177e4 LT |
617 | unsigned long offset; |
618 | unsigned long agp_offset; | |
619 | int count; | |
620 | int order; | |
621 | int size; | |
622 | int alignment; | |
623 | int page_order; | |
624 | int total; | |
625 | int byte_count; | |
54ba2f76 | 626 | int i, valid; |
056219e2 | 627 | struct drm_buf **temp_buflist; |
1da177e4 | 628 | |
b5e89ed5 DA |
629 | if (!dma) |
630 | return -EINVAL; | |
1da177e4 | 631 | |
d59431bf | 632 | count = request->count; |
04420c9c | 633 | order = order_base_2(request->size); |
1da177e4 LT |
634 | size = 1 << order; |
635 | ||
b5e89ed5 DA |
636 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
637 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
638 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
639 | total = PAGE_SIZE << page_order; | |
640 | ||
641 | byte_count = 0; | |
d59431bf | 642 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 643 | |
b5e89ed5 DA |
644 | DRM_DEBUG("count: %d\n", count); |
645 | DRM_DEBUG("order: %d\n", order); | |
646 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 647 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
648 | DRM_DEBUG("alignment: %d\n", alignment); |
649 | DRM_DEBUG("page_order: %d\n", page_order); | |
650 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 651 | |
b5e89ed5 DA |
652 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
653 | return -EINVAL; | |
1da177e4 | 654 | |
54ba2f76 DA |
655 | /* Make sure buffers are located in AGP memory that we own */ |
656 | valid = 0; | |
bd1b331f | 657 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
658 | if ((agp_offset >= agp_entry->bound) && |
659 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
660 | valid = 1; | |
661 | break; | |
662 | } | |
663 | } | |
bd1b331f | 664 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
665 | DRM_DEBUG("zone invalid\n"); |
666 | return -EINVAL; | |
667 | } | |
b5e89ed5 DA |
668 | spin_lock(&dev->count_lock); |
669 | if (dev->buf_use) { | |
670 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
671 | return -EBUSY; |
672 | } | |
b5e89ed5 DA |
673 | atomic_inc(&dev->buf_alloc); |
674 | spin_unlock(&dev->count_lock); | |
1da177e4 | 675 | |
30e2fb18 | 676 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 677 | entry = &dma->bufs[order]; |
b5e89ed5 | 678 | if (entry->buf_count) { |
30e2fb18 | 679 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
680 | atomic_dec(&dev->buf_alloc); |
681 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
682 | } |
683 | ||
684 | if (count < 0 || count > 4096) { | |
30e2fb18 | 685 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 686 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
687 | return -EINVAL; |
688 | } | |
689 | ||
94e3370e | 690 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 691 | if (!entry->buflist) { |
30e2fb18 | 692 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 693 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
694 | return -ENOMEM; |
695 | } | |
1da177e4 LT |
696 | |
697 | entry->buf_size = size; | |
698 | entry->page_order = page_order; | |
699 | ||
700 | offset = 0; | |
701 | ||
b5e89ed5 DA |
702 | while (entry->buf_count < count) { |
703 | buf = &entry->buflist[entry->buf_count]; | |
704 | buf->idx = dma->buf_count + entry->buf_count; | |
705 | buf->total = alignment; | |
706 | buf->order = order; | |
707 | buf->used = 0; | |
1da177e4 | 708 | |
b5e89ed5 | 709 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
710 | buf->bus_address = agp_offset + offset; |
711 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 712 | buf->next = NULL; |
1da177e4 LT |
713 | buf->waiting = 0; |
714 | buf->pending = 0; | |
6c340eac | 715 | buf->file_priv = NULL; |
1da177e4 LT |
716 | |
717 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 718 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 719 | if (!buf->dev_private) { |
1da177e4 LT |
720 | /* Set count correctly so we free the proper amount. */ |
721 | entry->buf_count = count; | |
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 | } | |
1da177e4 | 727 | |
b5e89ed5 | 728 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
729 | |
730 | offset += alignment; | |
731 | entry->buf_count++; | |
732 | byte_count += PAGE_SIZE << page_order; | |
733 | } | |
734 | ||
b5e89ed5 | 735 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 736 | |
9a298b2a EA |
737 | temp_buflist = krealloc(dma->buflist, |
738 | (dma->buf_count + entry->buf_count) * | |
739 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 740 | if (!temp_buflist) { |
1da177e4 | 741 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 742 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 743 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 744 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
745 | return -ENOMEM; |
746 | } | |
747 | dma->buflist = temp_buflist; | |
748 | ||
b5e89ed5 | 749 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
750 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
751 | } | |
752 | ||
753 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
754 | dma->seg_count += entry->seg_count; |
755 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
756 | dma->byte_count += byte_count; |
757 | ||
b5e89ed5 DA |
758 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
759 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 760 | |
30e2fb18 | 761 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 762 | |
d59431bf DA |
763 | request->count = entry->buf_count; |
764 | request->size = size; | |
1da177e4 LT |
765 | |
766 | dma->flags = _DRM_DMA_USE_AGP; | |
767 | ||
b5e89ed5 | 768 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
769 | return 0; |
770 | } | |
d84f76d3 | 771 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 772 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 773 | |
84b1fd10 | 774 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 775 | { |
cdd55a29 | 776 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
777 | int count; |
778 | int order; | |
779 | int size; | |
780 | int total; | |
781 | int page_order; | |
cdd55a29 | 782 | struct drm_buf_entry *entry; |
ddf19b97 | 783 | drm_dma_handle_t *dmah; |
056219e2 | 784 | struct drm_buf *buf; |
1da177e4 LT |
785 | int alignment; |
786 | unsigned long offset; | |
787 | int i; | |
788 | int byte_count; | |
789 | int page_count; | |
790 | unsigned long *temp_pagelist; | |
056219e2 | 791 | struct drm_buf **temp_buflist; |
1da177e4 | 792 | |
b5e89ed5 DA |
793 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
794 | return -EINVAL; | |
d985c108 | 795 | |
b5e89ed5 DA |
796 | if (!dma) |
797 | return -EINVAL; | |
1da177e4 | 798 | |
d985c108 DA |
799 | if (!capable(CAP_SYS_ADMIN)) |
800 | return -EPERM; | |
801 | ||
d59431bf | 802 | count = request->count; |
04420c9c | 803 | order = order_base_2(request->size); |
1da177e4 LT |
804 | size = 1 << order; |
805 | ||
a344a7e7 DV |
806 | DRM_DEBUG("count=%d, size=%d (%d), order=%d\n", |
807 | request->count, request->size, size, order); | |
1da177e4 | 808 | |
b5e89ed5 DA |
809 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
810 | return -EINVAL; | |
1da177e4 | 811 | |
d59431bf | 812 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 813 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
814 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
815 | total = PAGE_SIZE << page_order; | |
816 | ||
b5e89ed5 DA |
817 | spin_lock(&dev->count_lock); |
818 | if (dev->buf_use) { | |
819 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
820 | return -EBUSY; |
821 | } | |
b5e89ed5 DA |
822 | atomic_inc(&dev->buf_alloc); |
823 | spin_unlock(&dev->count_lock); | |
1da177e4 | 824 | |
30e2fb18 | 825 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 826 | entry = &dma->bufs[order]; |
b5e89ed5 | 827 | if (entry->buf_count) { |
30e2fb18 | 828 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 829 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
830 | return -ENOMEM; /* May only call once for each order */ |
831 | } | |
832 | ||
833 | if (count < 0 || count > 4096) { | |
30e2fb18 | 834 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 835 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
836 | return -EINVAL; |
837 | } | |
838 | ||
94e3370e | 839 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 840 | if (!entry->buflist) { |
30e2fb18 | 841 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 842 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
843 | return -ENOMEM; |
844 | } | |
b5e89ed5 | 845 | |
94e3370e | 846 | entry->seglist = kzalloc(count * sizeof(*entry->seglist), GFP_KERNEL); |
b5e89ed5 | 847 | if (!entry->seglist) { |
9a298b2a | 848 | kfree(entry->buflist); |
30e2fb18 | 849 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 850 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
851 | return -ENOMEM; |
852 | } | |
1da177e4 LT |
853 | |
854 | /* Keep the original pagelist until we know all the allocations | |
855 | * have succeeded | |
856 | */ | |
9a298b2a EA |
857 | temp_pagelist = kmalloc((dma->page_count + (count << page_order)) * |
858 | sizeof(*dma->pagelist), GFP_KERNEL); | |
1da177e4 | 859 | if (!temp_pagelist) { |
9a298b2a EA |
860 | kfree(entry->buflist); |
861 | kfree(entry->seglist); | |
30e2fb18 | 862 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 863 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
864 | return -ENOMEM; |
865 | } | |
866 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
867 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
868 | DRM_DEBUG("pagelist: %d entries\n", | |
869 | dma->page_count + (count << page_order)); | |
1da177e4 | 870 | |
b5e89ed5 | 871 | entry->buf_size = size; |
1da177e4 LT |
872 | entry->page_order = page_order; |
873 | byte_count = 0; | |
874 | page_count = 0; | |
875 | ||
b5e89ed5 | 876 | while (entry->buf_count < count) { |
bc5f4523 | 877 | |
e6be8d9d | 878 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000); |
bc5f4523 | 879 | |
ddf19b97 | 880 | if (!dmah) { |
1da177e4 LT |
881 | /* Set count correctly so we free the proper amount. */ |
882 | entry->buf_count = count; | |
883 | entry->seg_count = count; | |
884 | drm_cleanup_buf_error(dev, entry); | |
9a298b2a | 885 | kfree(temp_pagelist); |
30e2fb18 | 886 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 887 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
888 | return -ENOMEM; |
889 | } | |
ddf19b97 | 890 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
891 | for (i = 0; i < (1 << page_order); i++) { |
892 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
893 | dma->page_count + page_count, | |
ddf19b97 | 894 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 895 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 896 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 897 | } |
b5e89ed5 DA |
898 | for (offset = 0; |
899 | offset + size <= total && entry->buf_count < count; | |
900 | offset += alignment, ++entry->buf_count) { | |
901 | buf = &entry->buflist[entry->buf_count]; | |
902 | buf->idx = dma->buf_count + entry->buf_count; | |
903 | buf->total = alignment; | |
904 | buf->order = order; | |
905 | buf->used = 0; | |
906 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
907 | buf->address = (void *)(dmah->vaddr + offset); |
908 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 909 | buf->next = NULL; |
1da177e4 LT |
910 | buf->waiting = 0; |
911 | buf->pending = 0; | |
6c340eac | 912 | buf->file_priv = NULL; |
1da177e4 LT |
913 | |
914 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e DB |
915 | buf->dev_private = kzalloc(buf->dev_priv_size, |
916 | GFP_KERNEL); | |
b5e89ed5 | 917 | if (!buf->dev_private) { |
1da177e4 LT |
918 | /* Set count correctly so we free the proper amount. */ |
919 | entry->buf_count = count; | |
920 | entry->seg_count = count; | |
b5e89ed5 | 921 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 922 | kfree(temp_pagelist); |
30e2fb18 | 923 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 924 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
925 | return -ENOMEM; |
926 | } | |
1da177e4 | 927 | |
b5e89ed5 DA |
928 | DRM_DEBUG("buffer %d @ %p\n", |
929 | entry->buf_count, buf->address); | |
1da177e4 LT |
930 | } |
931 | byte_count += PAGE_SIZE << page_order; | |
932 | } | |
933 | ||
9a298b2a EA |
934 | temp_buflist = krealloc(dma->buflist, |
935 | (dma->buf_count + entry->buf_count) * | |
936 | sizeof(*dma->buflist), GFP_KERNEL); | |
1da177e4 LT |
937 | if (!temp_buflist) { |
938 | /* Free the entry because it isn't valid */ | |
b5e89ed5 | 939 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 940 | kfree(temp_pagelist); |
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 | ||
88393161 | 951 | /* No allocations failed, so now we can replace the original pagelist |
1da177e4 LT |
952 | * with the new one. |
953 | */ | |
954 | if (dma->page_count) { | |
9a298b2a | 955 | kfree(dma->pagelist); |
1da177e4 LT |
956 | } |
957 | dma->pagelist = temp_pagelist; | |
958 | ||
959 | dma->buf_count += entry->buf_count; | |
960 | dma->seg_count += entry->seg_count; | |
961 | dma->page_count += entry->seg_count << page_order; | |
962 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
963 | ||
30e2fb18 | 964 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 965 | |
d59431bf DA |
966 | request->count = entry->buf_count; |
967 | request->size = size; | |
1da177e4 | 968 | |
3417f33e GS |
969 | if (request->flags & _DRM_PCI_BUFFER_RO) |
970 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
971 | ||
b5e89ed5 | 972 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
973 | return 0; |
974 | ||
975 | } | |
d84f76d3 | 976 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 977 | |
84b1fd10 | 978 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 979 | { |
cdd55a29 DA |
980 | struct drm_device_dma *dma = dev->dma; |
981 | struct drm_buf_entry *entry; | |
056219e2 | 982 | struct drm_buf *buf; |
1da177e4 LT |
983 | unsigned long offset; |
984 | unsigned long agp_offset; | |
985 | int count; | |
986 | int order; | |
987 | int size; | |
988 | int alignment; | |
989 | int page_order; | |
990 | int total; | |
991 | int byte_count; | |
992 | int i; | |
056219e2 | 993 | struct drm_buf **temp_buflist; |
1da177e4 | 994 | |
b5e89ed5 DA |
995 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
996 | return -EINVAL; | |
997 | ||
998 | if (!dma) | |
999 | return -EINVAL; | |
1da177e4 | 1000 | |
d985c108 DA |
1001 | if (!capable(CAP_SYS_ADMIN)) |
1002 | return -EPERM; | |
1003 | ||
d59431bf | 1004 | count = request->count; |
04420c9c | 1005 | order = order_base_2(request->size); |
1da177e4 LT |
1006 | size = 1 << order; |
1007 | ||
b5e89ed5 DA |
1008 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
1009 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
1010 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
1011 | total = PAGE_SIZE << page_order; | |
1012 | ||
1013 | byte_count = 0; | |
d59431bf | 1014 | agp_offset = request->agp_start; |
1da177e4 | 1015 | |
b5e89ed5 DA |
1016 | DRM_DEBUG("count: %d\n", count); |
1017 | DRM_DEBUG("order: %d\n", order); | |
1018 | DRM_DEBUG("size: %d\n", size); | |
1019 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1020 | DRM_DEBUG("alignment: %d\n", alignment); | |
1021 | DRM_DEBUG("page_order: %d\n", page_order); | |
1022 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1023 | |
b5e89ed5 DA |
1024 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1025 | return -EINVAL; | |
1da177e4 | 1026 | |
b5e89ed5 DA |
1027 | spin_lock(&dev->count_lock); |
1028 | if (dev->buf_use) { | |
1029 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1030 | return -EBUSY; |
1031 | } | |
b5e89ed5 DA |
1032 | atomic_inc(&dev->buf_alloc); |
1033 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1034 | |
30e2fb18 | 1035 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1036 | entry = &dma->bufs[order]; |
b5e89ed5 | 1037 | if (entry->buf_count) { |
30e2fb18 | 1038 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1039 | atomic_dec(&dev->buf_alloc); |
1040 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1041 | } |
1042 | ||
1043 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1044 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1045 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1046 | return -EINVAL; |
1047 | } | |
1048 | ||
94e3370e | 1049 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1050 | GFP_KERNEL); |
b5e89ed5 | 1051 | if (!entry->buflist) { |
30e2fb18 | 1052 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1053 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1054 | return -ENOMEM; |
1055 | } | |
1da177e4 LT |
1056 | |
1057 | entry->buf_size = size; | |
1058 | entry->page_order = page_order; | |
1059 | ||
1060 | offset = 0; | |
1061 | ||
b5e89ed5 DA |
1062 | while (entry->buf_count < count) { |
1063 | buf = &entry->buflist[entry->buf_count]; | |
1064 | buf->idx = dma->buf_count + entry->buf_count; | |
1065 | buf->total = alignment; | |
1066 | buf->order = order; | |
1067 | buf->used = 0; | |
1da177e4 | 1068 | |
b5e89ed5 | 1069 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1070 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1071 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1072 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1073 | buf->next = NULL; |
1da177e4 LT |
1074 | buf->waiting = 0; |
1075 | buf->pending = 0; | |
6c340eac | 1076 | buf->file_priv = NULL; |
1da177e4 LT |
1077 | |
1078 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1079 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 1080 | if (!buf->dev_private) { |
1da177e4 LT |
1081 | /* Set count correctly so we free the proper amount. */ |
1082 | entry->buf_count = count; | |
b5e89ed5 | 1083 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1084 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1085 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1086 | return -ENOMEM; |
1087 | } | |
1088 | ||
b5e89ed5 | 1089 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1090 | |
1091 | offset += alignment; | |
1092 | entry->buf_count++; | |
1093 | byte_count += PAGE_SIZE << page_order; | |
1094 | } | |
1095 | ||
b5e89ed5 | 1096 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1097 | |
9a298b2a EA |
1098 | temp_buflist = krealloc(dma->buflist, |
1099 | (dma->buf_count + entry->buf_count) * | |
1100 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 1101 | if (!temp_buflist) { |
1da177e4 | 1102 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1103 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1104 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1105 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1106 | return -ENOMEM; |
1107 | } | |
1108 | dma->buflist = temp_buflist; | |
1109 | ||
b5e89ed5 | 1110 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1111 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1112 | } | |
1113 | ||
1114 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1115 | dma->seg_count += entry->seg_count; |
1116 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1117 | dma->byte_count += byte_count; |
1118 | ||
b5e89ed5 DA |
1119 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1120 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1121 | |
30e2fb18 | 1122 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1123 | |
d59431bf DA |
1124 | request->count = entry->buf_count; |
1125 | request->size = size; | |
1da177e4 LT |
1126 | |
1127 | dma->flags = _DRM_DMA_USE_SG; | |
1128 | ||
b5e89ed5 | 1129 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1130 | return 0; |
1131 | } | |
1132 | ||
84b1fd10 | 1133 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1134 | { |
cdd55a29 DA |
1135 | struct drm_device_dma *dma = dev->dma; |
1136 | struct drm_buf_entry *entry; | |
056219e2 | 1137 | struct drm_buf *buf; |
b84397d6 DA |
1138 | unsigned long offset; |
1139 | unsigned long agp_offset; | |
1140 | int count; | |
1141 | int order; | |
1142 | int size; | |
1143 | int alignment; | |
1144 | int page_order; | |
1145 | int total; | |
1146 | int byte_count; | |
1147 | int i; | |
056219e2 | 1148 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1149 | |
1150 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1151 | return -EINVAL; | |
b5e89ed5 | 1152 | |
b84397d6 DA |
1153 | if (!dma) |
1154 | return -EINVAL; | |
1155 | ||
d985c108 DA |
1156 | if (!capable(CAP_SYS_ADMIN)) |
1157 | return -EPERM; | |
1158 | ||
d59431bf | 1159 | count = request->count; |
04420c9c | 1160 | order = order_base_2(request->size); |
b84397d6 DA |
1161 | size = 1 << order; |
1162 | ||
d59431bf | 1163 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1164 | ? PAGE_ALIGN(size) : size; |
1165 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1166 | total = PAGE_SIZE << page_order; | |
1167 | ||
1168 | byte_count = 0; | |
d59431bf | 1169 | agp_offset = request->agp_start; |
b84397d6 DA |
1170 | |
1171 | DRM_DEBUG("count: %d\n", count); | |
1172 | DRM_DEBUG("order: %d\n", order); | |
1173 | DRM_DEBUG("size: %d\n", size); | |
1174 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1175 | DRM_DEBUG("alignment: %d\n", alignment); | |
1176 | DRM_DEBUG("page_order: %d\n", page_order); | |
1177 | DRM_DEBUG("total: %d\n", total); | |
1178 | ||
1179 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1180 | return -EINVAL; | |
b84397d6 DA |
1181 | |
1182 | spin_lock(&dev->count_lock); | |
1183 | if (dev->buf_use) { | |
1184 | spin_unlock(&dev->count_lock); | |
1185 | return -EBUSY; | |
1186 | } | |
1187 | atomic_inc(&dev->buf_alloc); | |
1188 | spin_unlock(&dev->count_lock); | |
1189 | ||
30e2fb18 | 1190 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1191 | entry = &dma->bufs[order]; |
1192 | if (entry->buf_count) { | |
30e2fb18 | 1193 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1194 | atomic_dec(&dev->buf_alloc); |
1195 | return -ENOMEM; /* May only call once for each order */ | |
1196 | } | |
1197 | ||
1198 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1199 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1200 | atomic_dec(&dev->buf_alloc); |
1201 | return -EINVAL; | |
1202 | } | |
1203 | ||
94e3370e | 1204 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1205 | GFP_KERNEL); |
b84397d6 | 1206 | if (!entry->buflist) { |
30e2fb18 | 1207 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1208 | atomic_dec(&dev->buf_alloc); |
1209 | return -ENOMEM; | |
1210 | } | |
b84397d6 DA |
1211 | |
1212 | entry->buf_size = size; | |
1213 | entry->page_order = page_order; | |
1214 | ||
1215 | offset = 0; | |
1216 | ||
1217 | while (entry->buf_count < count) { | |
1218 | buf = &entry->buflist[entry->buf_count]; | |
1219 | buf->idx = dma->buf_count + entry->buf_count; | |
1220 | buf->total = alignment; | |
1221 | buf->order = order; | |
1222 | buf->used = 0; | |
1223 | ||
1224 | buf->offset = (dma->byte_count + offset); | |
1225 | buf->bus_address = agp_offset + offset; | |
1226 | buf->address = (void *)(agp_offset + offset); | |
1227 | buf->next = NULL; | |
1228 | buf->waiting = 0; | |
1229 | buf->pending = 0; | |
6c340eac | 1230 | buf->file_priv = NULL; |
b84397d6 DA |
1231 | |
1232 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1233 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b84397d6 DA |
1234 | if (!buf->dev_private) { |
1235 | /* Set count correctly so we free the proper amount. */ | |
1236 | entry->buf_count = count; | |
1237 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1238 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1239 | atomic_dec(&dev->buf_alloc); |
1240 | return -ENOMEM; | |
1241 | } | |
b84397d6 DA |
1242 | |
1243 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1244 | ||
1245 | offset += alignment; | |
1246 | entry->buf_count++; | |
1247 | byte_count += PAGE_SIZE << page_order; | |
1248 | } | |
1249 | ||
1250 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1251 | ||
9a298b2a EA |
1252 | temp_buflist = krealloc(dma->buflist, |
1253 | (dma->buf_count + entry->buf_count) * | |
1254 | sizeof(*dma->buflist), GFP_KERNEL); | |
b84397d6 DA |
1255 | if (!temp_buflist) { |
1256 | /* Free the entry because it isn't valid */ | |
1257 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1258 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1259 | atomic_dec(&dev->buf_alloc); |
1260 | return -ENOMEM; | |
1261 | } | |
1262 | dma->buflist = temp_buflist; | |
1263 | ||
1264 | for (i = 0; i < entry->buf_count; i++) { | |
1265 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1266 | } | |
1267 | ||
1268 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1269 | dma->seg_count += entry->seg_count; |
1270 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1271 | dma->byte_count += byte_count; |
1272 | ||
1273 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1274 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1275 | ||
30e2fb18 | 1276 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1277 | |
d59431bf DA |
1278 | request->count = entry->buf_count; |
1279 | request->size = size; | |
b84397d6 DA |
1280 | |
1281 | dma->flags = _DRM_DMA_USE_FB; | |
1282 | ||
1283 | atomic_dec(&dev->buf_alloc); | |
1284 | return 0; | |
1285 | } | |
d985c108 | 1286 | |
b84397d6 | 1287 | |
1da177e4 LT |
1288 | /** |
1289 | * Add buffers for DMA transfers (ioctl). | |
1290 | * | |
1291 | * \param inode device inode. | |
6c340eac | 1292 | * \param file_priv DRM file private. |
1da177e4 | 1293 | * \param cmd command. |
c60ce623 | 1294 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1295 | * \return zero on success or a negative number on failure. |
1296 | * | |
1297 | * According with the memory type specified in drm_buf_desc::flags and the | |
1298 | * build options, it dispatches the call either to addbufs_agp(), | |
1299 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1300 | * PCI memory respectively. | |
1301 | */ | |
c153f45f EA |
1302 | int drm_addbufs(struct drm_device *dev, void *data, |
1303 | struct drm_file *file_priv) | |
1da177e4 | 1304 | { |
c153f45f | 1305 | struct drm_buf_desc *request = data; |
d59431bf | 1306 | int ret; |
b5e89ed5 | 1307 | |
8d38c4b4 DV |
1308 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1309 | return -EINVAL; | |
1310 | ||
1da177e4 LT |
1311 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1312 | return -EINVAL; | |
1313 | ||
1da177e4 | 1314 | #if __OS_HAS_AGP |
c153f45f EA |
1315 | if (request->flags & _DRM_AGP_BUFFER) |
1316 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1317 | else |
1318 | #endif | |
c153f45f EA |
1319 | if (request->flags & _DRM_SG_BUFFER) |
1320 | ret = drm_addbufs_sg(dev, request); | |
1321 | else if (request->flags & _DRM_FB_BUFFER) | |
1322 | ret = drm_addbufs_fb(dev, request); | |
1da177e4 | 1323 | else |
c153f45f | 1324 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1325 | |
d59431bf | 1326 | return ret; |
1da177e4 LT |
1327 | } |
1328 | ||
1da177e4 LT |
1329 | /** |
1330 | * Get information about the buffer mappings. | |
1331 | * | |
1332 | * This was originally mean for debugging purposes, or by a sophisticated | |
1333 | * client library to determine how best to use the available buffers (e.g., | |
1334 | * large buffers can be used for image transfer). | |
1335 | * | |
1336 | * \param inode device inode. | |
6c340eac | 1337 | * \param file_priv DRM file private. |
1da177e4 LT |
1338 | * \param cmd command. |
1339 | * \param arg pointer to a drm_buf_info structure. | |
1340 | * \return zero on success or a negative number on failure. | |
1341 | * | |
1342 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1343 | * lock, preventing of allocating more buffers after this call. Information | |
1344 | * about each requested buffer is then copied into user space. | |
1345 | */ | |
c153f45f EA |
1346 | int drm_infobufs(struct drm_device *dev, void *data, |
1347 | struct drm_file *file_priv) | |
1da177e4 | 1348 | { |
cdd55a29 | 1349 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1350 | struct drm_buf_info *request = data; |
1da177e4 LT |
1351 | int i; |
1352 | int count; | |
1353 | ||
8d38c4b4 DV |
1354 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1355 | return -EINVAL; | |
1356 | ||
1da177e4 LT |
1357 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1358 | return -EINVAL; | |
1359 | ||
b5e89ed5 DA |
1360 | if (!dma) |
1361 | return -EINVAL; | |
1da177e4 | 1362 | |
b5e89ed5 DA |
1363 | spin_lock(&dev->count_lock); |
1364 | if (atomic_read(&dev->buf_alloc)) { | |
1365 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1366 | return -EBUSY; |
1367 | } | |
1368 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1369 | spin_unlock(&dev->count_lock); |
1da177e4 | 1370 | |
b5e89ed5 DA |
1371 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1372 | if (dma->bufs[i].buf_count) | |
1373 | ++count; | |
1da177e4 LT |
1374 | } |
1375 | ||
b5e89ed5 | 1376 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1377 | |
c153f45f | 1378 | if (request->count >= count) { |
b5e89ed5 DA |
1379 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1380 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1381 | struct drm_buf_desc __user *to = |
c153f45f | 1382 | &request->list[count]; |
cdd55a29 DA |
1383 | struct drm_buf_entry *from = &dma->bufs[i]; |
1384 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1385 | if (copy_to_user(&to->count, |
1386 | &from->buf_count, | |
1387 | sizeof(from->buf_count)) || | |
1388 | copy_to_user(&to->size, | |
1389 | &from->buf_size, | |
1390 | sizeof(from->buf_size)) || | |
1391 | copy_to_user(&to->low_mark, | |
1392 | &list->low_mark, | |
1393 | sizeof(list->low_mark)) || | |
1394 | copy_to_user(&to->high_mark, | |
1395 | &list->high_mark, | |
1396 | sizeof(list->high_mark))) | |
1da177e4 LT |
1397 | return -EFAULT; |
1398 | ||
b5e89ed5 DA |
1399 | DRM_DEBUG("%d %d %d %d %d\n", |
1400 | i, | |
1401 | dma->bufs[i].buf_count, | |
1402 | dma->bufs[i].buf_size, | |
1403 | dma->bufs[i].freelist.low_mark, | |
1404 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1405 | ++count; |
1406 | } | |
1407 | } | |
1408 | } | |
c153f45f | 1409 | request->count = count; |
1da177e4 LT |
1410 | |
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | /** | |
1415 | * Specifies a low and high water mark for buffer allocation | |
1416 | * | |
1417 | * \param inode device inode. | |
6c340eac | 1418 | * \param file_priv DRM file private. |
1da177e4 LT |
1419 | * \param cmd command. |
1420 | * \param arg a pointer to a drm_buf_desc structure. | |
1421 | * \return zero on success or a negative number on failure. | |
1422 | * | |
1423 | * Verifies that the size order is bounded between the admissible orders and | |
1424 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1425 | * | |
1426 | * \note This ioctl is deprecated and mostly never used. | |
1427 | */ | |
c153f45f EA |
1428 | int drm_markbufs(struct drm_device *dev, void *data, |
1429 | struct drm_file *file_priv) | |
1da177e4 | 1430 | { |
cdd55a29 | 1431 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1432 | struct drm_buf_desc *request = data; |
1da177e4 | 1433 | int order; |
cdd55a29 | 1434 | struct drm_buf_entry *entry; |
1da177e4 | 1435 | |
8d38c4b4 DV |
1436 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1437 | return -EINVAL; | |
1438 | ||
1da177e4 LT |
1439 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1440 | return -EINVAL; | |
1441 | ||
b5e89ed5 DA |
1442 | if (!dma) |
1443 | return -EINVAL; | |
1da177e4 | 1444 | |
b5e89ed5 | 1445 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f | 1446 | request->size, request->low_mark, request->high_mark); |
04420c9c | 1447 | order = order_base_2(request->size); |
b5e89ed5 DA |
1448 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1449 | return -EINVAL; | |
1da177e4 LT |
1450 | entry = &dma->bufs[order]; |
1451 | ||
c153f45f | 1452 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1453 | return -EINVAL; |
c153f45f | 1454 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1455 | return -EINVAL; |
1456 | ||
c153f45f EA |
1457 | entry->freelist.low_mark = request->low_mark; |
1458 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1459 | |
1460 | return 0; | |
1461 | } | |
1462 | ||
1463 | /** | |
b5e89ed5 | 1464 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1465 | * |
1466 | * \param inode device inode. | |
6c340eac | 1467 | * \param file_priv DRM file private. |
1da177e4 LT |
1468 | * \param cmd command. |
1469 | * \param arg pointer to a drm_buf_free structure. | |
1470 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1471 | * |
1da177e4 LT |
1472 | * Calls free_buffer() for each used buffer. |
1473 | * This function is primarily used for debugging. | |
1474 | */ | |
c153f45f EA |
1475 | int drm_freebufs(struct drm_device *dev, void *data, |
1476 | struct drm_file *file_priv) | |
1da177e4 | 1477 | { |
cdd55a29 | 1478 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1479 | struct drm_buf_free *request = data; |
1da177e4 LT |
1480 | int i; |
1481 | int idx; | |
056219e2 | 1482 | struct drm_buf *buf; |
1da177e4 | 1483 | |
8d38c4b4 DV |
1484 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1485 | return -EINVAL; | |
1486 | ||
1da177e4 LT |
1487 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1488 | return -EINVAL; | |
1489 | ||
b5e89ed5 DA |
1490 | if (!dma) |
1491 | return -EINVAL; | |
1da177e4 | 1492 | |
c153f45f EA |
1493 | DRM_DEBUG("%d\n", request->count); |
1494 | for (i = 0; i < request->count; i++) { | |
1495 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1496 | return -EFAULT; |
b5e89ed5 DA |
1497 | if (idx < 0 || idx >= dma->buf_count) { |
1498 | DRM_ERROR("Index %d (of %d max)\n", | |
1499 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1500 | return -EINVAL; |
1501 | } | |
1502 | buf = dma->buflist[idx]; | |
6c340eac | 1503 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1504 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1505 | task_pid_nr(current)); |
1da177e4 LT |
1506 | return -EINVAL; |
1507 | } | |
b5e89ed5 | 1508 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1509 | } |
1510 | ||
1511 | return 0; | |
1512 | } | |
1513 | ||
1514 | /** | |
1515 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1516 | * | |
1517 | * \param inode device inode. | |
6c340eac | 1518 | * \param file_priv DRM file private. |
1da177e4 LT |
1519 | * \param cmd command. |
1520 | * \param arg pointer to a drm_buf_map structure. | |
1521 | * \return zero on success or a negative number on failure. | |
1522 | * | |
6be5ceb0 LT |
1523 | * Maps the AGP, SG or PCI buffer region with vm_mmap(), and copies information |
1524 | * about each buffer into user space. For PCI buffers, it calls vm_mmap() with | |
3417f33e GS |
1525 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls |
1526 | * drm_mmap_dma(). | |
1da177e4 | 1527 | */ |
c153f45f EA |
1528 | int drm_mapbufs(struct drm_device *dev, void *data, |
1529 | struct drm_file *file_priv) | |
1da177e4 | 1530 | { |
cdd55a29 | 1531 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1532 | int retcode = 0; |
1533 | const int zero = 0; | |
1534 | unsigned long virtual; | |
1535 | unsigned long address; | |
c153f45f | 1536 | struct drm_buf_map *request = data; |
1da177e4 LT |
1537 | int i; |
1538 | ||
8d38c4b4 DV |
1539 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1540 | return -EINVAL; | |
1541 | ||
1da177e4 LT |
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 | } | |
6be5ceb0 | 1569 | virtual = vm_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1570 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1571 | MAP_SHARED, |
1572 | token); | |
1da177e4 | 1573 | } else { |
6be5ceb0 | 1574 | virtual = vm_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1575 | PROT_READ | PROT_WRITE, |
1576 | MAP_SHARED, 0); | |
1da177e4 | 1577 | } |
b5e89ed5 | 1578 | if (virtual > -1024UL) { |
1da177e4 LT |
1579 | /* Real error */ |
1580 | retcode = (signed long)virtual; | |
1581 | goto done; | |
1582 | } | |
c153f45f | 1583 | request->virtual = (void __user *)virtual; |
1da177e4 | 1584 | |
b5e89ed5 | 1585 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1586 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1587 | &dma->buflist[i]->idx, |
c153f45f | 1588 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1589 | retcode = -EFAULT; |
1590 | goto done; | |
1591 | } | |
c153f45f | 1592 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1593 | &dma->buflist[i]->total, |
c153f45f | 1594 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1595 | retcode = -EFAULT; |
1596 | goto done; | |
1597 | } | |
c153f45f | 1598 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1599 | &zero, sizeof(zero))) { |
1da177e4 LT |
1600 | retcode = -EFAULT; |
1601 | goto done; | |
1602 | } | |
b5e89ed5 | 1603 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1604 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1605 | &address, sizeof(address))) { |
1da177e4 LT |
1606 | retcode = -EFAULT; |
1607 | goto done; | |
1608 | } | |
1609 | } | |
1610 | } | |
b5e89ed5 | 1611 | done: |
c153f45f EA |
1612 | request->count = dma->buf_count; |
1613 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1614 | |
1615 | return retcode; | |
1616 | } | |
1617 | ||
bd0c0cee DV |
1618 | struct drm_local_map *drm_getsarea(struct drm_device *dev) |
1619 | { | |
1620 | struct drm_map_list *entry; | |
1621 | ||
1622 | list_for_each_entry(entry, &dev->maplist, head) { | |
1623 | if (entry->map && entry->map->type == _DRM_SHM && | |
1624 | (entry->map->flags & _DRM_CONTAINS_LOCK)) { | |
1625 | return entry->map; | |
1626 | } | |
1627 | } | |
1628 | return NULL; | |
1629 | } | |
1630 | EXPORT_SYMBOL(drm_getsarea); |