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 DM |
38 | #include <linux/log2.h> |
39 | #include <asm/shmparam.h> | |
1da177e4 LT |
40 | #include "drmP.h" |
41 | ||
55910517 | 42 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
f77d390c | 43 | struct drm_local_map *map) |
836cf046 | 44 | { |
55910517 | 45 | struct drm_map_list *entry; |
bd1b331f | 46 | list_for_each_entry(entry, &dev->maplist, head) { |
41c2e75e BH |
47 | /* |
48 | * Because the kernel-userspace ABI is fixed at a 32-bit offset | |
49 | * while PCI resources may live above that, we ignore the map | |
50 | * offset for maps of type _DRM_FRAMEBUFFER or _DRM_REGISTERS. | |
51 | * It is assumed that each driver will have only one resource of | |
52 | * each type. | |
53 | */ | |
54 | if (!entry->map || | |
55 | map->type != entry->map->type || | |
56 | entry->master != dev->primary->master) | |
57 | continue; | |
58 | switch (map->type) { | |
59 | case _DRM_SHM: | |
60 | if (map->flags != _DRM_CONTAINS_LOCK) | |
61 | break; | |
62 | case _DRM_REGISTERS: | |
63 | case _DRM_FRAME_BUFFER: | |
89625eb1 | 64 | return entry; |
41c2e75e BH |
65 | default: /* Make gcc happy */ |
66 | ; | |
836cf046 | 67 | } |
41c2e75e BH |
68 | if (entry->map->offset == map->offset) |
69 | return entry; | |
836cf046 DA |
70 | } |
71 | ||
72 | return NULL; | |
1da177e4 | 73 | } |
1da177e4 | 74 | |
e0be428e | 75 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
f1a2a9b6 | 76 | unsigned long user_token, int hashed_handle, int shm) |
d1f2b55a | 77 | { |
f1a2a9b6 DM |
78 | int use_hashed_handle, shift; |
79 | unsigned long add; | |
80 | ||
c2604ce0 | 81 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
82 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
83 | #elif (BITS_PER_LONG == 32) | |
84 | use_hashed_handle = hashed_handle; | |
85 | #else | |
86 | #error Unsupported long size. Neither 64 nor 32 bits. | |
87 | #endif | |
d1f2b55a | 88 | |
e08870c8 TH |
89 | if (!use_hashed_handle) { |
90 | int ret; | |
1545085a | 91 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
92 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
93 | if (ret != -EINVAL) | |
94 | return ret; | |
d1f2b55a | 95 | } |
f1a2a9b6 DM |
96 | |
97 | shift = 0; | |
98 | add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT; | |
99 | if (shm && (SHMLBA > PAGE_SIZE)) { | |
100 | int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1; | |
101 | ||
102 | /* For shared memory, we have to preserve the SHMLBA | |
103 | * bits of the eventual vma->vm_pgoff value during | |
104 | * mmap(). Otherwise we run into cache aliasing problems | |
105 | * on some platforms. On these platforms, the pgoff of | |
106 | * a mmap() request is used to pick a suitable virtual | |
107 | * address for the mmap() region such that it will not | |
108 | * cause cache aliasing problems. | |
109 | * | |
110 | * Therefore, make sure the SHMLBA relevant bits of the | |
111 | * hash value we use are equal to those in the original | |
112 | * kernel virtual address. | |
113 | */ | |
114 | shift = bits; | |
115 | add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL)); | |
116 | } | |
117 | ||
e08870c8 TH |
118 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
119 | user_token, 32 - PAGE_SHIFT - 3, | |
f1a2a9b6 | 120 | shift, add); |
d1f2b55a | 121 | } |
9a186645 | 122 | |
1da177e4 | 123 | /** |
f77d390c BH |
124 | * Core function to create a range of memory available for mapping by a |
125 | * non-root process. | |
1da177e4 LT |
126 | * |
127 | * Adjusts the memory offset to its absolute value according to the mapping | |
128 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
129 | * applicable and if supported by the kernel. | |
130 | */ | |
41c2e75e | 131 | static int drm_addmap_core(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 132 | unsigned int size, enum drm_map_type type, |
55910517 DA |
133 | enum drm_map_flags flags, |
134 | struct drm_map_list ** maplist) | |
1da177e4 | 135 | { |
f77d390c | 136 | struct drm_local_map *map; |
55910517 | 137 | struct drm_map_list *list; |
9c8da5eb | 138 | drm_dma_handle_t *dmah; |
8d153f71 TH |
139 | unsigned long user_token; |
140 | int ret; | |
1da177e4 | 141 | |
9a298b2a | 142 | map = kmalloc(sizeof(*map), GFP_KERNEL); |
b5e89ed5 | 143 | if (!map) |
1da177e4 LT |
144 | return -ENOMEM; |
145 | ||
7ab98401 DA |
146 | map->offset = offset; |
147 | map->size = size; | |
148 | map->flags = flags; | |
149 | map->type = type; | |
1da177e4 LT |
150 | |
151 | /* Only allow shared memory to be removable since we only keep enough | |
152 | * book keeping information about shared memory to allow for removal | |
153 | * when processes fork. | |
154 | */ | |
b5e89ed5 | 155 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
9a298b2a | 156 | kfree(map); |
1da177e4 LT |
157 | return -EINVAL; |
158 | } | |
41c2e75e BH |
159 | DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n", |
160 | (unsigned long long)map->offset, map->size, map->type); | |
b6741377 BH |
161 | |
162 | /* page-align _DRM_SHM maps. They are allocated here so there is no security | |
163 | * hole created by that and it works around various broken drivers that use | |
164 | * a non-aligned quantity to map the SAREA. --BenH | |
165 | */ | |
166 | if (map->type == _DRM_SHM) | |
167 | map->size = PAGE_ALIGN(map->size); | |
168 | ||
41c2e75e | 169 | if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) { |
9a298b2a | 170 | kfree(map); |
1da177e4 LT |
171 | return -EINVAL; |
172 | } | |
b5e89ed5 | 173 | map->mtrr = -1; |
1da177e4 LT |
174 | map->handle = NULL; |
175 | ||
b5e89ed5 | 176 | switch (map->type) { |
1da177e4 LT |
177 | case _DRM_REGISTERS: |
178 | case _DRM_FRAME_BUFFER: | |
4b7fb9b5 | 179 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__arm__) |
8d2ea625 | 180 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 | 181 | map->offset < virt_to_phys(high_memory)) { |
9a298b2a | 182 | kfree(map); |
1da177e4 LT |
183 | return -EINVAL; |
184 | } | |
1da177e4 | 185 | #endif |
836cf046 DA |
186 | /* Some drivers preinitialize some maps, without the X Server |
187 | * needing to be aware of it. Therefore, we just return success | |
188 | * when the server tries to create a duplicate map. | |
189 | */ | |
89625eb1 DA |
190 | list = drm_find_matching_map(dev, map); |
191 | if (list != NULL) { | |
192 | if (list->map->size != map->size) { | |
836cf046 | 193 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
194 | "mismatched sizes, (%ld vs %ld)\n", |
195 | map->type, map->size, | |
196 | list->map->size); | |
89625eb1 | 197 | list->map->size = map->size; |
836cf046 DA |
198 | } |
199 | ||
9a298b2a | 200 | kfree(map); |
89625eb1 | 201 | *maplist = list; |
836cf046 DA |
202 | return 0; |
203 | } | |
204 | ||
1da177e4 | 205 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
206 | if (map->type == _DRM_FRAME_BUFFER || |
207 | (map->flags & _DRM_WRITE_COMBINING)) { | |
208 | map->mtrr = mtrr_add(map->offset, map->size, | |
209 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
210 | } |
211 | } | |
0769d39c | 212 | if (map->type == _DRM_REGISTERS) { |
004a7727 | 213 | map->handle = ioremap(map->offset, map->size); |
0769d39c | 214 | if (!map->handle) { |
9a298b2a | 215 | kfree(map); |
0769d39c ST |
216 | return -ENOMEM; |
217 | } | |
218 | } | |
bc5f4523 | 219 | |
1da177e4 | 220 | break; |
1da177e4 | 221 | case _DRM_SHM: |
54ba2f76 DA |
222 | list = drm_find_matching_map(dev, map); |
223 | if (list != NULL) { | |
224 | if(list->map->size != map->size) { | |
225 | DRM_DEBUG("Matching maps of type %d with " | |
226 | "mismatched sizes, (%ld vs %ld)\n", | |
227 | map->type, map->size, list->map->size); | |
228 | list->map->size = map->size; | |
229 | } | |
230 | ||
9a298b2a | 231 | kfree(map); |
54ba2f76 DA |
232 | *maplist = list; |
233 | return 0; | |
234 | } | |
f239b7b0 | 235 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
236 | DRM_DEBUG("%lu %d %p\n", |
237 | map->size, drm_order(map->size), map->handle); | |
238 | if (!map->handle) { | |
9a298b2a | 239 | kfree(map); |
1da177e4 LT |
240 | return -ENOMEM; |
241 | } | |
242 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 243 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 244 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
7c1c2871 | 245 | if (dev->primary->master->lock.hw_lock != NULL) { |
b5e89ed5 | 246 | vfree(map->handle); |
9a298b2a | 247 | kfree(map); |
1da177e4 LT |
248 | return -EBUSY; |
249 | } | |
7c1c2871 | 250 | dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
251 | } |
252 | break; | |
54ba2f76 | 253 | case _DRM_AGP: { |
55910517 | 254 | struct drm_agp_mem *entry; |
54ba2f76 DA |
255 | int valid = 0; |
256 | ||
257 | if (!drm_core_has_AGP(dev)) { | |
9a298b2a | 258 | kfree(map); |
54ba2f76 DA |
259 | return -EINVAL; |
260 | } | |
1da177e4 | 261 | #ifdef __alpha__ |
54ba2f76 | 262 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 263 | #endif |
47a184a8 EA |
264 | /* In some cases (i810 driver), user space may have already |
265 | * added the AGP base itself, because dev->agp->base previously | |
266 | * only got set during AGP enable. So, only add the base | |
267 | * address if the map's offset isn't already within the | |
268 | * aperture. | |
54ba2f76 | 269 | */ |
47a184a8 EA |
270 | if (map->offset < dev->agp->base || |
271 | map->offset > dev->agp->base + | |
272 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
273 | map->offset += dev->agp->base; | |
274 | } | |
54ba2f76 DA |
275 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
276 | ||
277 | /* This assumes the DRM is in total control of AGP space. | |
278 | * It's not always the case as AGP can be in the control | |
279 | * of user space (i.e. i810 driver). So this loop will get | |
280 | * skipped and we double check that dev->agp->memory is | |
281 | * actually set as well as being invalid before EPERM'ing | |
282 | */ | |
bd1b331f | 283 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
284 | if ((map->offset >= entry->bound) && |
285 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
286 | valid = 1; | |
287 | break; | |
288 | } | |
1da177e4 | 289 | } |
bd1b331f | 290 | if (!list_empty(&dev->agp->memory) && !valid) { |
9a298b2a | 291 | kfree(map); |
54ba2f76 DA |
292 | return -EPERM; |
293 | } | |
41c2e75e BH |
294 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
295 | (unsigned long long)map->offset, map->size); | |
54ba2f76 | 296 | |
a2c0a97b | 297 | break; |
812c369d | 298 | } |
a2c0a97b | 299 | case _DRM_GEM: |
812c369d | 300 | DRM_ERROR("tried to addmap GEM object\n"); |
1da177e4 LT |
301 | break; |
302 | case _DRM_SCATTER_GATHER: | |
303 | if (!dev->sg) { | |
9a298b2a | 304 | kfree(map); |
1da177e4 LT |
305 | return -EINVAL; |
306 | } | |
d1f2b55a | 307 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 308 | break; |
b5e89ed5 | 309 | case _DRM_CONSISTENT: |
2d0f9eaf | 310 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 311 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
312 | * casting it down to 32 bits is no problem, but we |
313 | * need to point to a 64bit variable first. */ | |
e6be8d9d | 314 | dmah = drm_pci_alloc(dev, map->size, map->size); |
9c8da5eb | 315 | if (!dmah) { |
9a298b2a | 316 | kfree(map); |
2d0f9eaf DA |
317 | return -ENOMEM; |
318 | } | |
9c8da5eb DA |
319 | map->handle = dmah->vaddr; |
320 | map->offset = (unsigned long)dmah->busaddr; | |
321 | kfree(dmah); | |
2d0f9eaf | 322 | break; |
1da177e4 | 323 | default: |
9a298b2a | 324 | kfree(map); |
1da177e4 LT |
325 | return -EINVAL; |
326 | } | |
327 | ||
94e3370e | 328 | list = kzalloc(sizeof(*list), GFP_KERNEL); |
b5e89ed5 | 329 | if (!list) { |
85abb3f9 | 330 | if (map->type == _DRM_REGISTERS) |
004a7727 | 331 | iounmap(map->handle); |
9a298b2a | 332 | kfree(map); |
1da177e4 LT |
333 | return -EINVAL; |
334 | } | |
1da177e4 LT |
335 | list->map = map; |
336 | ||
30e2fb18 | 337 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 338 | list_add(&list->head, &dev->maplist); |
8d153f71 | 339 | |
d1f2b55a | 340 | /* Assign a 32-bit handle */ |
30e2fb18 | 341 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
342 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
343 | map->offset; | |
f1a2a9b6 DM |
344 | ret = drm_map_handle(dev, &list->hash, user_token, 0, |
345 | (map->type == _DRM_SHM)); | |
8d153f71 | 346 | if (ret) { |
85abb3f9 | 347 | if (map->type == _DRM_REGISTERS) |
004a7727 | 348 | iounmap(map->handle); |
9a298b2a EA |
349 | kfree(map); |
350 | kfree(list); | |
8d153f71 TH |
351 | mutex_unlock(&dev->struct_mutex); |
352 | return ret; | |
353 | } | |
354 | ||
1545085a | 355 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 356 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 357 | |
2ff2e8a3 BS |
358 | if (!(map->flags & _DRM_DRIVER)) |
359 | list->master = dev->primary->master; | |
89625eb1 | 360 | *maplist = list; |
7ab98401 | 361 | return 0; |
54ba2f76 | 362 | } |
89625eb1 | 363 | |
41c2e75e | 364 | int drm_addmap(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 365 | unsigned int size, enum drm_map_type type, |
f77d390c | 366 | enum drm_map_flags flags, struct drm_local_map ** map_ptr) |
89625eb1 | 367 | { |
55910517 | 368 | struct drm_map_list *list; |
89625eb1 DA |
369 | int rc; |
370 | ||
371 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
372 | if (!rc) | |
373 | *map_ptr = list->map; | |
374 | return rc; | |
375 | } | |
b5e89ed5 | 376 | |
7ab98401 DA |
377 | EXPORT_SYMBOL(drm_addmap); |
378 | ||
f77d390c BH |
379 | /** |
380 | * Ioctl to specify a range of memory that is available for mapping by a | |
381 | * non-root process. | |
382 | * | |
383 | * \param inode device inode. | |
384 | * \param file_priv DRM file private. | |
385 | * \param cmd command. | |
386 | * \param arg pointer to a drm_map structure. | |
387 | * \return zero on success or a negative value on error. | |
388 | * | |
389 | */ | |
c153f45f EA |
390 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
391 | struct drm_file *file_priv) | |
7ab98401 | 392 | { |
c153f45f | 393 | struct drm_map *map = data; |
55910517 | 394 | struct drm_map_list *maplist; |
7ab98401 DA |
395 | int err; |
396 | ||
7c1c2871 | 397 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
398 | return -EPERM; |
399 | ||
c153f45f EA |
400 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
401 | map->flags, &maplist); | |
7ab98401 | 402 | |
b5e89ed5 | 403 | if (err) |
7ab98401 | 404 | return err; |
d1f2b55a | 405 | |
67e1a014 | 406 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 407 | map->handle = (void *)(unsigned long)maplist->user_token; |
1da177e4 | 408 | return 0; |
88f399cd | 409 | } |
1da177e4 | 410 | |
1da177e4 LT |
411 | /** |
412 | * Remove a map private from list and deallocate resources if the mapping | |
413 | * isn't in use. | |
414 | * | |
1da177e4 LT |
415 | * Searches the map on drm_device::maplist, removes it from the list, see if |
416 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
417 | * being on use. | |
418 | * | |
7ab98401 | 419 | * \sa drm_addmap |
1da177e4 | 420 | */ |
f77d390c | 421 | int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 422 | { |
55910517 | 423 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 424 | drm_dma_handle_t dmah; |
bd1b331f | 425 | int found = 0; |
7c1c2871 | 426 | struct drm_master *master; |
1da177e4 | 427 | |
836cf046 | 428 | /* Find the list entry for the map and remove it */ |
bd1b331f | 429 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 430 | if (r_list->map == map) { |
7c1c2871 | 431 | master = r_list->master; |
bd1b331f | 432 | list_del(&r_list->head); |
1545085a TH |
433 | drm_ht_remove_key(&dev->map_hash, |
434 | r_list->user_token >> PAGE_SHIFT); | |
9a298b2a | 435 | kfree(r_list); |
bd1b331f | 436 | found = 1; |
836cf046 DA |
437 | break; |
438 | } | |
1da177e4 LT |
439 | } |
440 | ||
bd1b331f | 441 | if (!found) |
1da177e4 | 442 | return -EINVAL; |
1da177e4 | 443 | |
836cf046 DA |
444 | switch (map->type) { |
445 | case _DRM_REGISTERS: | |
004a7727 | 446 | iounmap(map->handle); |
836cf046 DA |
447 | /* FALLTHROUGH */ |
448 | case _DRM_FRAME_BUFFER: | |
449 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
450 | int retcode; | |
b5e89ed5 DA |
451 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
452 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 453 | } |
836cf046 DA |
454 | break; |
455 | case _DRM_SHM: | |
456 | vfree(map->handle); | |
7c1c2871 DA |
457 | if (master) { |
458 | if (dev->sigdata.lock == master->lock.hw_lock) | |
459 | dev->sigdata.lock = NULL; | |
460 | master->lock.hw_lock = NULL; /* SHM removed */ | |
461 | master->lock.file_priv = NULL; | |
171901d1 | 462 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 463 | } |
836cf046 DA |
464 | break; |
465 | case _DRM_AGP: | |
466 | case _DRM_SCATTER_GATHER: | |
467 | break; | |
468 | case _DRM_CONSISTENT: | |
469 | dmah.vaddr = map->handle; | |
470 | dmah.busaddr = map->offset; | |
471 | dmah.size = map->size; | |
472 | __drm_pci_free(dev, &dmah); | |
473 | break; | |
a2c0a97b JB |
474 | case _DRM_GEM: |
475 | DRM_ERROR("tried to rmmap GEM object\n"); | |
476 | break; | |
1da177e4 | 477 | } |
9a298b2a | 478 | kfree(map); |
836cf046 | 479 | |
1da177e4 LT |
480 | return 0; |
481 | } | |
4e74f36d | 482 | EXPORT_SYMBOL(drm_rmmap_locked); |
836cf046 | 483 | |
f77d390c | 484 | int drm_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 DA |
485 | { |
486 | int ret; | |
487 | ||
30e2fb18 | 488 | mutex_lock(&dev->struct_mutex); |
836cf046 | 489 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 490 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
491 | |
492 | return ret; | |
493 | } | |
ba8bbcf6 | 494 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 495 | |
836cf046 DA |
496 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
497 | * the last close of the device, and this is necessary for cleanup when things | |
498 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
499 | * like a pointless exercise since they're going away anyway. | |
500 | * | |
501 | * One use case might be after addmap is allowed for normal users for SHM and | |
502 | * gets used by drivers that the server doesn't need to care about. This seems | |
503 | * unlikely. | |
f77d390c BH |
504 | * |
505 | * \param inode device inode. | |
506 | * \param file_priv DRM file private. | |
507 | * \param cmd command. | |
508 | * \param arg pointer to a struct drm_map structure. | |
509 | * \return zero on success or a negative value on error. | |
836cf046 | 510 | */ |
c153f45f EA |
511 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
512 | struct drm_file *file_priv) | |
7ab98401 | 513 | { |
c153f45f | 514 | struct drm_map *request = data; |
f77d390c | 515 | struct drm_local_map *map = NULL; |
55910517 | 516 | struct drm_map_list *r_list; |
836cf046 | 517 | int ret; |
7ab98401 | 518 | |
30e2fb18 | 519 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 520 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 521 | if (r_list->map && |
c153f45f | 522 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
523 | r_list->map->flags & _DRM_REMOVABLE) { |
524 | map = r_list->map; | |
525 | break; | |
526 | } | |
527 | } | |
528 | ||
529 | /* List has wrapped around to the head pointer, or its empty we didn't | |
530 | * find anything. | |
531 | */ | |
bd1b331f | 532 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 533 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
534 | return -EINVAL; |
535 | } | |
536 | ||
836cf046 DA |
537 | /* Register and framebuffer maps are permanent */ |
538 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 539 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
540 | return 0; |
541 | } | |
542 | ||
543 | ret = drm_rmmap_locked(dev, map); | |
544 | ||
30e2fb18 | 545 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
546 | |
547 | return ret; | |
7ab98401 | 548 | } |
1da177e4 LT |
549 | |
550 | /** | |
551 | * Cleanup after an error on one of the addbufs() functions. | |
552 | * | |
836cf046 | 553 | * \param dev DRM device. |
1da177e4 LT |
554 | * \param entry buffer entry where the error occurred. |
555 | * | |
556 | * Frees any pages and buffers associated with the given entry. | |
557 | */ | |
cdd55a29 DA |
558 | static void drm_cleanup_buf_error(struct drm_device * dev, |
559 | struct drm_buf_entry * entry) | |
1da177e4 LT |
560 | { |
561 | int i; | |
562 | ||
563 | if (entry->seg_count) { | |
564 | for (i = 0; i < entry->seg_count; i++) { | |
565 | if (entry->seglist[i]) { | |
ddf19b97 | 566 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
567 | } |
568 | } | |
9a298b2a | 569 | kfree(entry->seglist); |
1da177e4 LT |
570 | |
571 | entry->seg_count = 0; | |
572 | } | |
573 | ||
b5e89ed5 DA |
574 | if (entry->buf_count) { |
575 | for (i = 0; i < entry->buf_count; i++) { | |
9a298b2a | 576 | kfree(entry->buflist[i].dev_private); |
1da177e4 | 577 | } |
9a298b2a | 578 | kfree(entry->buflist); |
1da177e4 LT |
579 | |
580 | entry->buf_count = 0; | |
581 | } | |
582 | } | |
583 | ||
584 | #if __OS_HAS_AGP | |
585 | /** | |
d59431bf | 586 | * Add AGP buffers for DMA transfers. |
1da177e4 | 587 | * |
84b1fd10 | 588 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 589 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 590 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 591 | * |
1da177e4 LT |
592 | * After some sanity checks creates a drm_buf structure for each buffer and |
593 | * reallocates the buffer list of the same size order to accommodate the new | |
594 | * buffers. | |
595 | */ | |
84b1fd10 | 596 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 597 | { |
cdd55a29 DA |
598 | struct drm_device_dma *dma = dev->dma; |
599 | struct drm_buf_entry *entry; | |
55910517 | 600 | struct drm_agp_mem *agp_entry; |
056219e2 | 601 | struct drm_buf *buf; |
1da177e4 LT |
602 | unsigned long offset; |
603 | unsigned long agp_offset; | |
604 | int count; | |
605 | int order; | |
606 | int size; | |
607 | int alignment; | |
608 | int page_order; | |
609 | int total; | |
610 | int byte_count; | |
54ba2f76 | 611 | int i, valid; |
056219e2 | 612 | struct drm_buf **temp_buflist; |
1da177e4 | 613 | |
b5e89ed5 DA |
614 | if (!dma) |
615 | return -EINVAL; | |
1da177e4 | 616 | |
d59431bf DA |
617 | count = request->count; |
618 | order = drm_order(request->size); | |
1da177e4 LT |
619 | size = 1 << order; |
620 | ||
b5e89ed5 DA |
621 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
622 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
623 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
624 | total = PAGE_SIZE << page_order; | |
625 | ||
626 | byte_count = 0; | |
d59431bf | 627 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 628 | |
b5e89ed5 DA |
629 | DRM_DEBUG("count: %d\n", count); |
630 | DRM_DEBUG("order: %d\n", order); | |
631 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 632 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
633 | DRM_DEBUG("alignment: %d\n", alignment); |
634 | DRM_DEBUG("page_order: %d\n", page_order); | |
635 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 636 | |
b5e89ed5 DA |
637 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
638 | return -EINVAL; | |
639 | if (dev->queue_count) | |
640 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 641 | |
54ba2f76 DA |
642 | /* Make sure buffers are located in AGP memory that we own */ |
643 | valid = 0; | |
bd1b331f | 644 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
645 | if ((agp_offset >= agp_entry->bound) && |
646 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
647 | valid = 1; | |
648 | break; | |
649 | } | |
650 | } | |
bd1b331f | 651 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
652 | DRM_DEBUG("zone invalid\n"); |
653 | return -EINVAL; | |
654 | } | |
b5e89ed5 DA |
655 | spin_lock(&dev->count_lock); |
656 | if (dev->buf_use) { | |
657 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
658 | return -EBUSY; |
659 | } | |
b5e89ed5 DA |
660 | atomic_inc(&dev->buf_alloc); |
661 | spin_unlock(&dev->count_lock); | |
1da177e4 | 662 | |
30e2fb18 | 663 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 664 | entry = &dma->bufs[order]; |
b5e89ed5 | 665 | if (entry->buf_count) { |
30e2fb18 | 666 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
667 | atomic_dec(&dev->buf_alloc); |
668 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
669 | } |
670 | ||
671 | if (count < 0 || count > 4096) { | |
30e2fb18 | 672 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 673 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
674 | return -EINVAL; |
675 | } | |
676 | ||
94e3370e | 677 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 678 | if (!entry->buflist) { |
30e2fb18 | 679 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 680 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
681 | return -ENOMEM; |
682 | } | |
1da177e4 LT |
683 | |
684 | entry->buf_size = size; | |
685 | entry->page_order = page_order; | |
686 | ||
687 | offset = 0; | |
688 | ||
b5e89ed5 DA |
689 | while (entry->buf_count < count) { |
690 | buf = &entry->buflist[entry->buf_count]; | |
691 | buf->idx = dma->buf_count + entry->buf_count; | |
692 | buf->total = alignment; | |
693 | buf->order = order; | |
694 | buf->used = 0; | |
1da177e4 | 695 | |
b5e89ed5 | 696 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
697 | buf->bus_address = agp_offset + offset; |
698 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 699 | buf->next = NULL; |
1da177e4 LT |
700 | buf->waiting = 0; |
701 | buf->pending = 0; | |
b5e89ed5 | 702 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 703 | buf->file_priv = NULL; |
1da177e4 LT |
704 | |
705 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 706 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 707 | if (!buf->dev_private) { |
1da177e4 LT |
708 | /* Set count correctly so we free the proper amount. */ |
709 | entry->buf_count = count; | |
b5e89ed5 | 710 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 711 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 712 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
713 | return -ENOMEM; |
714 | } | |
1da177e4 | 715 | |
b5e89ed5 | 716 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
717 | |
718 | offset += alignment; | |
719 | entry->buf_count++; | |
720 | byte_count += PAGE_SIZE << page_order; | |
721 | } | |
722 | ||
b5e89ed5 | 723 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 724 | |
9a298b2a EA |
725 | temp_buflist = krealloc(dma->buflist, |
726 | (dma->buf_count + entry->buf_count) * | |
727 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 728 | if (!temp_buflist) { |
1da177e4 | 729 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 730 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 731 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 732 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
733 | return -ENOMEM; |
734 | } | |
735 | dma->buflist = temp_buflist; | |
736 | ||
b5e89ed5 | 737 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
738 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
739 | } | |
740 | ||
741 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
742 | dma->seg_count += entry->seg_count; |
743 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
744 | dma->byte_count += byte_count; |
745 | ||
b5e89ed5 DA |
746 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
747 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 748 | |
30e2fb18 | 749 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 750 | |
d59431bf DA |
751 | request->count = entry->buf_count; |
752 | request->size = size; | |
1da177e4 LT |
753 | |
754 | dma->flags = _DRM_DMA_USE_AGP; | |
755 | ||
b5e89ed5 | 756 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
757 | return 0; |
758 | } | |
d84f76d3 | 759 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 760 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 761 | |
84b1fd10 | 762 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 763 | { |
cdd55a29 | 764 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
765 | int count; |
766 | int order; | |
767 | int size; | |
768 | int total; | |
769 | int page_order; | |
cdd55a29 | 770 | struct drm_buf_entry *entry; |
ddf19b97 | 771 | drm_dma_handle_t *dmah; |
056219e2 | 772 | struct drm_buf *buf; |
1da177e4 LT |
773 | int alignment; |
774 | unsigned long offset; | |
775 | int i; | |
776 | int byte_count; | |
777 | int page_count; | |
778 | unsigned long *temp_pagelist; | |
056219e2 | 779 | struct drm_buf **temp_buflist; |
1da177e4 | 780 | |
b5e89ed5 DA |
781 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
782 | return -EINVAL; | |
d985c108 | 783 | |
b5e89ed5 DA |
784 | if (!dma) |
785 | return -EINVAL; | |
1da177e4 | 786 | |
d985c108 DA |
787 | if (!capable(CAP_SYS_ADMIN)) |
788 | return -EPERM; | |
789 | ||
d59431bf DA |
790 | count = request->count; |
791 | order = drm_order(request->size); | |
1da177e4 LT |
792 | size = 1 << order; |
793 | ||
b5e89ed5 DA |
794 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
795 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 796 | |
b5e89ed5 DA |
797 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
798 | return -EINVAL; | |
799 | if (dev->queue_count) | |
800 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 801 | |
d59431bf | 802 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 803 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
804 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
805 | total = PAGE_SIZE << page_order; | |
806 | ||
b5e89ed5 DA |
807 | spin_lock(&dev->count_lock); |
808 | if (dev->buf_use) { | |
809 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
810 | return -EBUSY; |
811 | } | |
b5e89ed5 DA |
812 | atomic_inc(&dev->buf_alloc); |
813 | spin_unlock(&dev->count_lock); | |
1da177e4 | 814 | |
30e2fb18 | 815 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 816 | entry = &dma->bufs[order]; |
b5e89ed5 | 817 | if (entry->buf_count) { |
30e2fb18 | 818 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 819 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
820 | return -ENOMEM; /* May only call once for each order */ |
821 | } | |
822 | ||
823 | if (count < 0 || count > 4096) { | |
30e2fb18 | 824 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 825 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
826 | return -EINVAL; |
827 | } | |
828 | ||
94e3370e | 829 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 830 | if (!entry->buflist) { |
30e2fb18 | 831 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 832 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
833 | return -ENOMEM; |
834 | } | |
b5e89ed5 | 835 | |
94e3370e | 836 | entry->seglist = kzalloc(count * sizeof(*entry->seglist), GFP_KERNEL); |
b5e89ed5 | 837 | if (!entry->seglist) { |
9a298b2a | 838 | kfree(entry->buflist); |
30e2fb18 | 839 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 840 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
841 | return -ENOMEM; |
842 | } | |
1da177e4 LT |
843 | |
844 | /* Keep the original pagelist until we know all the allocations | |
845 | * have succeeded | |
846 | */ | |
9a298b2a EA |
847 | temp_pagelist = kmalloc((dma->page_count + (count << page_order)) * |
848 | sizeof(*dma->pagelist), GFP_KERNEL); | |
1da177e4 | 849 | if (!temp_pagelist) { |
9a298b2a EA |
850 | kfree(entry->buflist); |
851 | kfree(entry->seglist); | |
30e2fb18 | 852 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 853 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
854 | return -ENOMEM; |
855 | } | |
856 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
857 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
858 | DRM_DEBUG("pagelist: %d entries\n", | |
859 | dma->page_count + (count << page_order)); | |
1da177e4 | 860 | |
b5e89ed5 | 861 | entry->buf_size = size; |
1da177e4 LT |
862 | entry->page_order = page_order; |
863 | byte_count = 0; | |
864 | page_count = 0; | |
865 | ||
b5e89ed5 | 866 | while (entry->buf_count < count) { |
bc5f4523 | 867 | |
e6be8d9d | 868 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000); |
bc5f4523 | 869 | |
ddf19b97 | 870 | if (!dmah) { |
1da177e4 LT |
871 | /* Set count correctly so we free the proper amount. */ |
872 | entry->buf_count = count; | |
873 | entry->seg_count = count; | |
874 | drm_cleanup_buf_error(dev, entry); | |
9a298b2a | 875 | kfree(temp_pagelist); |
30e2fb18 | 876 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 877 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
878 | return -ENOMEM; |
879 | } | |
ddf19b97 | 880 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
881 | for (i = 0; i < (1 << page_order); i++) { |
882 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
883 | dma->page_count + page_count, | |
ddf19b97 | 884 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 885 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 886 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 887 | } |
b5e89ed5 DA |
888 | for (offset = 0; |
889 | offset + size <= total && entry->buf_count < count; | |
890 | offset += alignment, ++entry->buf_count) { | |
891 | buf = &entry->buflist[entry->buf_count]; | |
892 | buf->idx = dma->buf_count + entry->buf_count; | |
893 | buf->total = alignment; | |
894 | buf->order = order; | |
895 | buf->used = 0; | |
896 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
897 | buf->address = (void *)(dmah->vaddr + offset); |
898 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 899 | buf->next = NULL; |
1da177e4 LT |
900 | buf->waiting = 0; |
901 | buf->pending = 0; | |
b5e89ed5 | 902 | init_waitqueue_head(&buf->dma_wait); |
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 DA |
995 | count = request->count; |
996 | order = drm_order(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; | |
1017 | if (dev->queue_count) | |
1018 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1019 | |
b5e89ed5 DA |
1020 | spin_lock(&dev->count_lock); |
1021 | if (dev->buf_use) { | |
1022 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1023 | return -EBUSY; |
1024 | } | |
b5e89ed5 DA |
1025 | atomic_inc(&dev->buf_alloc); |
1026 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1027 | |
30e2fb18 | 1028 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1029 | entry = &dma->bufs[order]; |
b5e89ed5 | 1030 | if (entry->buf_count) { |
30e2fb18 | 1031 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1032 | atomic_dec(&dev->buf_alloc); |
1033 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1034 | } |
1035 | ||
1036 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1037 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1038 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1039 | return -EINVAL; |
1040 | } | |
1041 | ||
94e3370e | 1042 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1043 | GFP_KERNEL); |
b5e89ed5 | 1044 | if (!entry->buflist) { |
30e2fb18 | 1045 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1046 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1047 | return -ENOMEM; |
1048 | } | |
1da177e4 LT |
1049 | |
1050 | entry->buf_size = size; | |
1051 | entry->page_order = page_order; | |
1052 | ||
1053 | offset = 0; | |
1054 | ||
b5e89ed5 DA |
1055 | while (entry->buf_count < count) { |
1056 | buf = &entry->buflist[entry->buf_count]; | |
1057 | buf->idx = dma->buf_count + entry->buf_count; | |
1058 | buf->total = alignment; | |
1059 | buf->order = order; | |
1060 | buf->used = 0; | |
1da177e4 | 1061 | |
b5e89ed5 | 1062 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1063 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1064 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1065 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1066 | buf->next = NULL; |
1da177e4 LT |
1067 | buf->waiting = 0; |
1068 | buf->pending = 0; | |
b5e89ed5 | 1069 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 1070 | buf->file_priv = NULL; |
1da177e4 LT |
1071 | |
1072 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1073 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 1074 | if (!buf->dev_private) { |
1da177e4 LT |
1075 | /* Set count correctly so we free the proper amount. */ |
1076 | entry->buf_count = count; | |
b5e89ed5 | 1077 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1078 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1079 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1080 | return -ENOMEM; |
1081 | } | |
1082 | ||
b5e89ed5 | 1083 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1084 | |
1085 | offset += alignment; | |
1086 | entry->buf_count++; | |
1087 | byte_count += PAGE_SIZE << page_order; | |
1088 | } | |
1089 | ||
b5e89ed5 | 1090 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1091 | |
9a298b2a EA |
1092 | temp_buflist = krealloc(dma->buflist, |
1093 | (dma->buf_count + entry->buf_count) * | |
1094 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 1095 | if (!temp_buflist) { |
1da177e4 | 1096 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1097 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1098 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1099 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1100 | return -ENOMEM; |
1101 | } | |
1102 | dma->buflist = temp_buflist; | |
1103 | ||
b5e89ed5 | 1104 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1105 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1106 | } | |
1107 | ||
1108 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1109 | dma->seg_count += entry->seg_count; |
1110 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1111 | dma->byte_count += byte_count; |
1112 | ||
b5e89ed5 DA |
1113 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1114 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1115 | |
30e2fb18 | 1116 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1117 | |
d59431bf DA |
1118 | request->count = entry->buf_count; |
1119 | request->size = size; | |
1da177e4 LT |
1120 | |
1121 | dma->flags = _DRM_DMA_USE_SG; | |
1122 | ||
b5e89ed5 | 1123 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1124 | return 0; |
1125 | } | |
1126 | ||
84b1fd10 | 1127 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1128 | { |
cdd55a29 DA |
1129 | struct drm_device_dma *dma = dev->dma; |
1130 | struct drm_buf_entry *entry; | |
056219e2 | 1131 | struct drm_buf *buf; |
b84397d6 DA |
1132 | unsigned long offset; |
1133 | unsigned long agp_offset; | |
1134 | int count; | |
1135 | int order; | |
1136 | int size; | |
1137 | int alignment; | |
1138 | int page_order; | |
1139 | int total; | |
1140 | int byte_count; | |
1141 | int i; | |
056219e2 | 1142 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1143 | |
1144 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1145 | return -EINVAL; | |
b5e89ed5 | 1146 | |
b84397d6 DA |
1147 | if (!dma) |
1148 | return -EINVAL; | |
1149 | ||
d985c108 DA |
1150 | if (!capable(CAP_SYS_ADMIN)) |
1151 | return -EPERM; | |
1152 | ||
d59431bf DA |
1153 | count = request->count; |
1154 | order = drm_order(request->size); | |
b84397d6 DA |
1155 | size = 1 << order; |
1156 | ||
d59431bf | 1157 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1158 | ? PAGE_ALIGN(size) : size; |
1159 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1160 | total = PAGE_SIZE << page_order; | |
1161 | ||
1162 | byte_count = 0; | |
d59431bf | 1163 | agp_offset = request->agp_start; |
b84397d6 DA |
1164 | |
1165 | DRM_DEBUG("count: %d\n", count); | |
1166 | DRM_DEBUG("order: %d\n", order); | |
1167 | DRM_DEBUG("size: %d\n", size); | |
1168 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1169 | DRM_DEBUG("alignment: %d\n", alignment); | |
1170 | DRM_DEBUG("page_order: %d\n", page_order); | |
1171 | DRM_DEBUG("total: %d\n", total); | |
1172 | ||
1173 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1174 | return -EINVAL; | |
1175 | if (dev->queue_count) | |
1176 | return -EBUSY; /* Not while in use */ | |
1177 | ||
1178 | spin_lock(&dev->count_lock); | |
1179 | if (dev->buf_use) { | |
1180 | spin_unlock(&dev->count_lock); | |
1181 | return -EBUSY; | |
1182 | } | |
1183 | atomic_inc(&dev->buf_alloc); | |
1184 | spin_unlock(&dev->count_lock); | |
1185 | ||
30e2fb18 | 1186 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1187 | entry = &dma->bufs[order]; |
1188 | if (entry->buf_count) { | |
30e2fb18 | 1189 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1190 | atomic_dec(&dev->buf_alloc); |
1191 | return -ENOMEM; /* May only call once for each order */ | |
1192 | } | |
1193 | ||
1194 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1195 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1196 | atomic_dec(&dev->buf_alloc); |
1197 | return -EINVAL; | |
1198 | } | |
1199 | ||
94e3370e | 1200 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1201 | GFP_KERNEL); |
b84397d6 | 1202 | if (!entry->buflist) { |
30e2fb18 | 1203 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1204 | atomic_dec(&dev->buf_alloc); |
1205 | return -ENOMEM; | |
1206 | } | |
b84397d6 DA |
1207 | |
1208 | entry->buf_size = size; | |
1209 | entry->page_order = page_order; | |
1210 | ||
1211 | offset = 0; | |
1212 | ||
1213 | while (entry->buf_count < count) { | |
1214 | buf = &entry->buflist[entry->buf_count]; | |
1215 | buf->idx = dma->buf_count + entry->buf_count; | |
1216 | buf->total = alignment; | |
1217 | buf->order = order; | |
1218 | buf->used = 0; | |
1219 | ||
1220 | buf->offset = (dma->byte_count + offset); | |
1221 | buf->bus_address = agp_offset + offset; | |
1222 | buf->address = (void *)(agp_offset + offset); | |
1223 | buf->next = NULL; | |
1224 | buf->waiting = 0; | |
1225 | buf->pending = 0; | |
1226 | init_waitqueue_head(&buf->dma_wait); | |
6c340eac | 1227 | buf->file_priv = NULL; |
b84397d6 DA |
1228 | |
1229 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1230 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b84397d6 DA |
1231 | if (!buf->dev_private) { |
1232 | /* Set count correctly so we free the proper amount. */ | |
1233 | entry->buf_count = count; | |
1234 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1235 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1236 | atomic_dec(&dev->buf_alloc); |
1237 | return -ENOMEM; | |
1238 | } | |
b84397d6 DA |
1239 | |
1240 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1241 | ||
1242 | offset += alignment; | |
1243 | entry->buf_count++; | |
1244 | byte_count += PAGE_SIZE << page_order; | |
1245 | } | |
1246 | ||
1247 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1248 | ||
9a298b2a EA |
1249 | temp_buflist = krealloc(dma->buflist, |
1250 | (dma->buf_count + entry->buf_count) * | |
1251 | sizeof(*dma->buflist), GFP_KERNEL); | |
b84397d6 DA |
1252 | if (!temp_buflist) { |
1253 | /* Free the entry because it isn't valid */ | |
1254 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1255 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1256 | atomic_dec(&dev->buf_alloc); |
1257 | return -ENOMEM; | |
1258 | } | |
1259 | dma->buflist = temp_buflist; | |
1260 | ||
1261 | for (i = 0; i < entry->buf_count; i++) { | |
1262 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1263 | } | |
1264 | ||
1265 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1266 | dma->seg_count += entry->seg_count; |
1267 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1268 | dma->byte_count += byte_count; |
1269 | ||
1270 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1271 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1272 | ||
30e2fb18 | 1273 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1274 | |
d59431bf DA |
1275 | request->count = entry->buf_count; |
1276 | request->size = size; | |
b84397d6 DA |
1277 | |
1278 | dma->flags = _DRM_DMA_USE_FB; | |
1279 | ||
1280 | atomic_dec(&dev->buf_alloc); | |
1281 | return 0; | |
1282 | } | |
d985c108 | 1283 | |
b84397d6 | 1284 | |
1da177e4 LT |
1285 | /** |
1286 | * Add buffers for DMA transfers (ioctl). | |
1287 | * | |
1288 | * \param inode device inode. | |
6c340eac | 1289 | * \param file_priv DRM file private. |
1da177e4 | 1290 | * \param cmd command. |
c60ce623 | 1291 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1292 | * \return zero on success or a negative number on failure. |
1293 | * | |
1294 | * According with the memory type specified in drm_buf_desc::flags and the | |
1295 | * build options, it dispatches the call either to addbufs_agp(), | |
1296 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1297 | * PCI memory respectively. | |
1298 | */ | |
c153f45f EA |
1299 | int drm_addbufs(struct drm_device *dev, void *data, |
1300 | struct drm_file *file_priv) | |
1da177e4 | 1301 | { |
c153f45f | 1302 | struct drm_buf_desc *request = data; |
d59431bf | 1303 | int ret; |
b5e89ed5 | 1304 | |
1da177e4 LT |
1305 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1306 | return -EINVAL; | |
1307 | ||
1da177e4 | 1308 | #if __OS_HAS_AGP |
c153f45f EA |
1309 | if (request->flags & _DRM_AGP_BUFFER) |
1310 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1311 | else |
1312 | #endif | |
c153f45f EA |
1313 | if (request->flags & _DRM_SG_BUFFER) |
1314 | ret = drm_addbufs_sg(dev, request); | |
1315 | else if (request->flags & _DRM_FB_BUFFER) | |
1316 | ret = drm_addbufs_fb(dev, request); | |
1da177e4 | 1317 | else |
c153f45f | 1318 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1319 | |
d59431bf | 1320 | return ret; |
1da177e4 LT |
1321 | } |
1322 | ||
1da177e4 LT |
1323 | /** |
1324 | * Get information about the buffer mappings. | |
1325 | * | |
1326 | * This was originally mean for debugging purposes, or by a sophisticated | |
1327 | * client library to determine how best to use the available buffers (e.g., | |
1328 | * large buffers can be used for image transfer). | |
1329 | * | |
1330 | * \param inode device inode. | |
6c340eac | 1331 | * \param file_priv DRM file private. |
1da177e4 LT |
1332 | * \param cmd command. |
1333 | * \param arg pointer to a drm_buf_info structure. | |
1334 | * \return zero on success or a negative number on failure. | |
1335 | * | |
1336 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1337 | * lock, preventing of allocating more buffers after this call. Information | |
1338 | * about each requested buffer is then copied into user space. | |
1339 | */ | |
c153f45f EA |
1340 | int drm_infobufs(struct drm_device *dev, void *data, |
1341 | struct drm_file *file_priv) | |
1da177e4 | 1342 | { |
cdd55a29 | 1343 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1344 | struct drm_buf_info *request = data; |
1da177e4 LT |
1345 | int i; |
1346 | int count; | |
1347 | ||
1348 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1349 | return -EINVAL; | |
1350 | ||
b5e89ed5 DA |
1351 | if (!dma) |
1352 | return -EINVAL; | |
1da177e4 | 1353 | |
b5e89ed5 DA |
1354 | spin_lock(&dev->count_lock); |
1355 | if (atomic_read(&dev->buf_alloc)) { | |
1356 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1357 | return -EBUSY; |
1358 | } | |
1359 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1360 | spin_unlock(&dev->count_lock); |
1da177e4 | 1361 | |
b5e89ed5 DA |
1362 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1363 | if (dma->bufs[i].buf_count) | |
1364 | ++count; | |
1da177e4 LT |
1365 | } |
1366 | ||
b5e89ed5 | 1367 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1368 | |
c153f45f | 1369 | if (request->count >= count) { |
b5e89ed5 DA |
1370 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1371 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1372 | struct drm_buf_desc __user *to = |
c153f45f | 1373 | &request->list[count]; |
cdd55a29 DA |
1374 | struct drm_buf_entry *from = &dma->bufs[i]; |
1375 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1376 | if (copy_to_user(&to->count, |
1377 | &from->buf_count, | |
1378 | sizeof(from->buf_count)) || | |
1379 | copy_to_user(&to->size, | |
1380 | &from->buf_size, | |
1381 | sizeof(from->buf_size)) || | |
1382 | copy_to_user(&to->low_mark, | |
1383 | &list->low_mark, | |
1384 | sizeof(list->low_mark)) || | |
1385 | copy_to_user(&to->high_mark, | |
1386 | &list->high_mark, | |
1387 | sizeof(list->high_mark))) | |
1da177e4 LT |
1388 | return -EFAULT; |
1389 | ||
b5e89ed5 DA |
1390 | DRM_DEBUG("%d %d %d %d %d\n", |
1391 | i, | |
1392 | dma->bufs[i].buf_count, | |
1393 | dma->bufs[i].buf_size, | |
1394 | dma->bufs[i].freelist.low_mark, | |
1395 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1396 | ++count; |
1397 | } | |
1398 | } | |
1399 | } | |
c153f45f | 1400 | request->count = count; |
1da177e4 LT |
1401 | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | /** | |
1406 | * Specifies a low and high water mark for buffer allocation | |
1407 | * | |
1408 | * \param inode device inode. | |
6c340eac | 1409 | * \param file_priv DRM file private. |
1da177e4 LT |
1410 | * \param cmd command. |
1411 | * \param arg a pointer to a drm_buf_desc structure. | |
1412 | * \return zero on success or a negative number on failure. | |
1413 | * | |
1414 | * Verifies that the size order is bounded between the admissible orders and | |
1415 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1416 | * | |
1417 | * \note This ioctl is deprecated and mostly never used. | |
1418 | */ | |
c153f45f EA |
1419 | int drm_markbufs(struct drm_device *dev, void *data, |
1420 | struct drm_file *file_priv) | |
1da177e4 | 1421 | { |
cdd55a29 | 1422 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1423 | struct drm_buf_desc *request = data; |
1da177e4 | 1424 | int order; |
cdd55a29 | 1425 | struct drm_buf_entry *entry; |
1da177e4 LT |
1426 | |
1427 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1428 | return -EINVAL; | |
1429 | ||
b5e89ed5 DA |
1430 | if (!dma) |
1431 | return -EINVAL; | |
1da177e4 | 1432 | |
b5e89ed5 | 1433 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f EA |
1434 | request->size, request->low_mark, request->high_mark); |
1435 | order = drm_order(request->size); | |
b5e89ed5 DA |
1436 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1437 | return -EINVAL; | |
1da177e4 LT |
1438 | entry = &dma->bufs[order]; |
1439 | ||
c153f45f | 1440 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1441 | return -EINVAL; |
c153f45f | 1442 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1443 | return -EINVAL; |
1444 | ||
c153f45f EA |
1445 | entry->freelist.low_mark = request->low_mark; |
1446 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1447 | |
1448 | return 0; | |
1449 | } | |
1450 | ||
1451 | /** | |
b5e89ed5 | 1452 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1453 | * |
1454 | * \param inode device inode. | |
6c340eac | 1455 | * \param file_priv DRM file private. |
1da177e4 LT |
1456 | * \param cmd command. |
1457 | * \param arg pointer to a drm_buf_free structure. | |
1458 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1459 | * |
1da177e4 LT |
1460 | * Calls free_buffer() for each used buffer. |
1461 | * This function is primarily used for debugging. | |
1462 | */ | |
c153f45f EA |
1463 | int drm_freebufs(struct drm_device *dev, void *data, |
1464 | struct drm_file *file_priv) | |
1da177e4 | 1465 | { |
cdd55a29 | 1466 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1467 | struct drm_buf_free *request = data; |
1da177e4 LT |
1468 | int i; |
1469 | int idx; | |
056219e2 | 1470 | struct drm_buf *buf; |
1da177e4 LT |
1471 | |
1472 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1473 | return -EINVAL; | |
1474 | ||
b5e89ed5 DA |
1475 | if (!dma) |
1476 | return -EINVAL; | |
1da177e4 | 1477 | |
c153f45f EA |
1478 | DRM_DEBUG("%d\n", request->count); |
1479 | for (i = 0; i < request->count; i++) { | |
1480 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1481 | return -EFAULT; |
b5e89ed5 DA |
1482 | if (idx < 0 || idx >= dma->buf_count) { |
1483 | DRM_ERROR("Index %d (of %d max)\n", | |
1484 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1485 | return -EINVAL; |
1486 | } | |
1487 | buf = dma->buflist[idx]; | |
6c340eac | 1488 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1489 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1490 | task_pid_nr(current)); |
1da177e4 LT |
1491 | return -EINVAL; |
1492 | } | |
b5e89ed5 | 1493 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1494 | } |
1495 | ||
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | /** | |
1500 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1501 | * | |
1502 | * \param inode device inode. | |
6c340eac | 1503 | * \param file_priv DRM file private. |
1da177e4 LT |
1504 | * \param cmd command. |
1505 | * \param arg pointer to a drm_buf_map structure. | |
1506 | * \return zero on success or a negative number on failure. | |
1507 | * | |
3417f33e GS |
1508 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1509 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1510 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1511 | * drm_mmap_dma(). | |
1da177e4 | 1512 | */ |
c153f45f EA |
1513 | int drm_mapbufs(struct drm_device *dev, void *data, |
1514 | struct drm_file *file_priv) | |
1da177e4 | 1515 | { |
cdd55a29 | 1516 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1517 | int retcode = 0; |
1518 | const int zero = 0; | |
1519 | unsigned long virtual; | |
1520 | unsigned long address; | |
c153f45f | 1521 | struct drm_buf_map *request = data; |
1da177e4 LT |
1522 | int i; |
1523 | ||
1524 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1525 | return -EINVAL; | |
1526 | ||
b5e89ed5 DA |
1527 | if (!dma) |
1528 | return -EINVAL; | |
1da177e4 | 1529 | |
b5e89ed5 DA |
1530 | spin_lock(&dev->count_lock); |
1531 | if (atomic_read(&dev->buf_alloc)) { | |
1532 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1533 | return -EBUSY; |
1534 | } | |
1535 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1536 | spin_unlock(&dev->count_lock); |
1da177e4 | 1537 | |
c153f45f | 1538 | if (request->count >= dma->buf_count) { |
b84397d6 | 1539 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1540 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1541 | && (dma->flags & _DRM_DMA_USE_SG)) |
1542 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1543 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
f77d390c | 1544 | struct drm_local_map *map = dev->agp_buffer_map; |
d1f2b55a | 1545 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1546 | |
b5e89ed5 | 1547 | if (!map) { |
1da177e4 LT |
1548 | retcode = -EINVAL; |
1549 | goto done; | |
1550 | } | |
b5e89ed5 | 1551 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1552 | virtual = do_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1553 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1554 | MAP_SHARED, |
1555 | token); | |
b5e89ed5 | 1556 | up_write(¤t->mm->mmap_sem); |
1da177e4 | 1557 | } else { |
b5e89ed5 | 1558 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1559 | virtual = do_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1560 | PROT_READ | PROT_WRITE, |
1561 | MAP_SHARED, 0); | |
1562 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1563 | } |
b5e89ed5 | 1564 | if (virtual > -1024UL) { |
1da177e4 LT |
1565 | /* Real error */ |
1566 | retcode = (signed long)virtual; | |
1567 | goto done; | |
1568 | } | |
c153f45f | 1569 | request->virtual = (void __user *)virtual; |
1da177e4 | 1570 | |
b5e89ed5 | 1571 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1572 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1573 | &dma->buflist[i]->idx, |
c153f45f | 1574 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1575 | retcode = -EFAULT; |
1576 | goto done; | |
1577 | } | |
c153f45f | 1578 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1579 | &dma->buflist[i]->total, |
c153f45f | 1580 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1581 | retcode = -EFAULT; |
1582 | goto done; | |
1583 | } | |
c153f45f | 1584 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1585 | &zero, sizeof(zero))) { |
1da177e4 LT |
1586 | retcode = -EFAULT; |
1587 | goto done; | |
1588 | } | |
b5e89ed5 | 1589 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1590 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1591 | &address, sizeof(address))) { |
1da177e4 LT |
1592 | retcode = -EFAULT; |
1593 | goto done; | |
1594 | } | |
1595 | } | |
1596 | } | |
b5e89ed5 | 1597 | done: |
c153f45f EA |
1598 | request->count = dma->buf_count; |
1599 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1600 | |
1601 | return retcode; | |
1602 | } | |
1603 | ||
836cf046 DA |
1604 | /** |
1605 | * Compute size order. Returns the exponent of the smaller power of two which | |
1606 | * is greater or equal to given number. | |
b5e89ed5 | 1607 | * |
836cf046 DA |
1608 | * \param size size. |
1609 | * \return order. | |
1610 | * | |
1611 | * \todo Can be made faster. | |
1612 | */ | |
b5e89ed5 | 1613 | int drm_order(unsigned long size) |
836cf046 DA |
1614 | { |
1615 | int order; | |
1616 | unsigned long tmp; | |
1617 | ||
b5e89ed5 | 1618 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1619 | |
1620 | if (size & (size - 1)) | |
1621 | ++order; | |
1622 | ||
1623 | return order; | |
1624 | } | |
1625 | EXPORT_SYMBOL(drm_order); |