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 | } | |
185 | #endif | |
186 | #ifdef __alpha__ | |
187 | map->offset += dev->hose->mem_space->start; | |
188 | #endif | |
836cf046 DA |
189 | /* Some drivers preinitialize some maps, without the X Server |
190 | * needing to be aware of it. Therefore, we just return success | |
191 | * when the server tries to create a duplicate map. | |
192 | */ | |
89625eb1 DA |
193 | list = drm_find_matching_map(dev, map); |
194 | if (list != NULL) { | |
195 | if (list->map->size != map->size) { | |
836cf046 | 196 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
197 | "mismatched sizes, (%ld vs %ld)\n", |
198 | map->type, map->size, | |
199 | list->map->size); | |
89625eb1 | 200 | list->map->size = map->size; |
836cf046 DA |
201 | } |
202 | ||
9a298b2a | 203 | kfree(map); |
89625eb1 | 204 | *maplist = list; |
836cf046 DA |
205 | return 0; |
206 | } | |
207 | ||
1da177e4 | 208 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
209 | if (map->type == _DRM_FRAME_BUFFER || |
210 | (map->flags & _DRM_WRITE_COMBINING)) { | |
211 | map->mtrr = mtrr_add(map->offset, map->size, | |
212 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
213 | } |
214 | } | |
0769d39c | 215 | if (map->type == _DRM_REGISTERS) { |
004a7727 | 216 | map->handle = ioremap(map->offset, map->size); |
0769d39c | 217 | if (!map->handle) { |
9a298b2a | 218 | kfree(map); |
0769d39c ST |
219 | return -ENOMEM; |
220 | } | |
221 | } | |
bc5f4523 | 222 | |
1da177e4 | 223 | break; |
1da177e4 | 224 | case _DRM_SHM: |
54ba2f76 DA |
225 | list = drm_find_matching_map(dev, map); |
226 | if (list != NULL) { | |
227 | if(list->map->size != map->size) { | |
228 | DRM_DEBUG("Matching maps of type %d with " | |
229 | "mismatched sizes, (%ld vs %ld)\n", | |
230 | map->type, map->size, list->map->size); | |
231 | list->map->size = map->size; | |
232 | } | |
233 | ||
9a298b2a | 234 | kfree(map); |
54ba2f76 DA |
235 | *maplist = list; |
236 | return 0; | |
237 | } | |
f239b7b0 | 238 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
239 | DRM_DEBUG("%lu %d %p\n", |
240 | map->size, drm_order(map->size), map->handle); | |
241 | if (!map->handle) { | |
9a298b2a | 242 | kfree(map); |
1da177e4 LT |
243 | return -ENOMEM; |
244 | } | |
245 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 246 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 247 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
7c1c2871 | 248 | if (dev->primary->master->lock.hw_lock != NULL) { |
b5e89ed5 | 249 | vfree(map->handle); |
9a298b2a | 250 | kfree(map); |
1da177e4 LT |
251 | return -EBUSY; |
252 | } | |
7c1c2871 | 253 | dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
254 | } |
255 | break; | |
54ba2f76 | 256 | case _DRM_AGP: { |
55910517 | 257 | struct drm_agp_mem *entry; |
54ba2f76 DA |
258 | int valid = 0; |
259 | ||
260 | if (!drm_core_has_AGP(dev)) { | |
9a298b2a | 261 | kfree(map); |
54ba2f76 DA |
262 | return -EINVAL; |
263 | } | |
1da177e4 | 264 | #ifdef __alpha__ |
54ba2f76 | 265 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 266 | #endif |
47a184a8 EA |
267 | /* In some cases (i810 driver), user space may have already |
268 | * added the AGP base itself, because dev->agp->base previously | |
269 | * only got set during AGP enable. So, only add the base | |
270 | * address if the map's offset isn't already within the | |
271 | * aperture. | |
54ba2f76 | 272 | */ |
47a184a8 EA |
273 | if (map->offset < dev->agp->base || |
274 | map->offset > dev->agp->base + | |
275 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
276 | map->offset += dev->agp->base; | |
277 | } | |
54ba2f76 DA |
278 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
279 | ||
280 | /* This assumes the DRM is in total control of AGP space. | |
281 | * It's not always the case as AGP can be in the control | |
282 | * of user space (i.e. i810 driver). So this loop will get | |
283 | * skipped and we double check that dev->agp->memory is | |
284 | * actually set as well as being invalid before EPERM'ing | |
285 | */ | |
bd1b331f | 286 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
287 | if ((map->offset >= entry->bound) && |
288 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
289 | valid = 1; | |
290 | break; | |
291 | } | |
1da177e4 | 292 | } |
bd1b331f | 293 | if (!list_empty(&dev->agp->memory) && !valid) { |
9a298b2a | 294 | kfree(map); |
54ba2f76 DA |
295 | return -EPERM; |
296 | } | |
41c2e75e BH |
297 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
298 | (unsigned long long)map->offset, map->size); | |
54ba2f76 | 299 | |
a2c0a97b | 300 | break; |
812c369d | 301 | } |
a2c0a97b | 302 | case _DRM_GEM: |
812c369d | 303 | DRM_ERROR("tried to addmap GEM object\n"); |
1da177e4 LT |
304 | break; |
305 | case _DRM_SCATTER_GATHER: | |
306 | if (!dev->sg) { | |
9a298b2a | 307 | kfree(map); |
1da177e4 LT |
308 | return -EINVAL; |
309 | } | |
d1f2b55a | 310 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 311 | break; |
b5e89ed5 | 312 | case _DRM_CONSISTENT: |
2d0f9eaf | 313 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 314 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
315 | * casting it down to 32 bits is no problem, but we |
316 | * need to point to a 64bit variable first. */ | |
e6be8d9d | 317 | dmah = drm_pci_alloc(dev, map->size, map->size); |
9c8da5eb | 318 | if (!dmah) { |
9a298b2a | 319 | kfree(map); |
2d0f9eaf DA |
320 | return -ENOMEM; |
321 | } | |
9c8da5eb DA |
322 | map->handle = dmah->vaddr; |
323 | map->offset = (unsigned long)dmah->busaddr; | |
324 | kfree(dmah); | |
2d0f9eaf | 325 | break; |
1da177e4 | 326 | default: |
9a298b2a | 327 | kfree(map); |
1da177e4 LT |
328 | return -EINVAL; |
329 | } | |
330 | ||
94e3370e | 331 | list = kzalloc(sizeof(*list), GFP_KERNEL); |
b5e89ed5 | 332 | if (!list) { |
85abb3f9 | 333 | if (map->type == _DRM_REGISTERS) |
004a7727 | 334 | iounmap(map->handle); |
9a298b2a | 335 | kfree(map); |
1da177e4 LT |
336 | return -EINVAL; |
337 | } | |
1da177e4 LT |
338 | list->map = map; |
339 | ||
30e2fb18 | 340 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 341 | list_add(&list->head, &dev->maplist); |
8d153f71 | 342 | |
d1f2b55a | 343 | /* Assign a 32-bit handle */ |
30e2fb18 | 344 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
345 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
346 | map->offset; | |
f1a2a9b6 DM |
347 | ret = drm_map_handle(dev, &list->hash, user_token, 0, |
348 | (map->type == _DRM_SHM)); | |
8d153f71 | 349 | if (ret) { |
85abb3f9 | 350 | if (map->type == _DRM_REGISTERS) |
004a7727 | 351 | iounmap(map->handle); |
9a298b2a EA |
352 | kfree(map); |
353 | kfree(list); | |
8d153f71 TH |
354 | mutex_unlock(&dev->struct_mutex); |
355 | return ret; | |
356 | } | |
357 | ||
1545085a | 358 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 359 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 360 | |
2ff2e8a3 BS |
361 | if (!(map->flags & _DRM_DRIVER)) |
362 | list->master = dev->primary->master; | |
89625eb1 | 363 | *maplist = list; |
7ab98401 | 364 | return 0; |
54ba2f76 | 365 | } |
89625eb1 | 366 | |
41c2e75e | 367 | int drm_addmap(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 368 | unsigned int size, enum drm_map_type type, |
f77d390c | 369 | enum drm_map_flags flags, struct drm_local_map ** map_ptr) |
89625eb1 | 370 | { |
55910517 | 371 | struct drm_map_list *list; |
89625eb1 DA |
372 | int rc; |
373 | ||
374 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
375 | if (!rc) | |
376 | *map_ptr = list->map; | |
377 | return rc; | |
378 | } | |
b5e89ed5 | 379 | |
7ab98401 DA |
380 | EXPORT_SYMBOL(drm_addmap); |
381 | ||
f77d390c BH |
382 | /** |
383 | * Ioctl to specify a range of memory that is available for mapping by a | |
384 | * non-root process. | |
385 | * | |
386 | * \param inode device inode. | |
387 | * \param file_priv DRM file private. | |
388 | * \param cmd command. | |
389 | * \param arg pointer to a drm_map structure. | |
390 | * \return zero on success or a negative value on error. | |
391 | * | |
392 | */ | |
c153f45f EA |
393 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
394 | struct drm_file *file_priv) | |
7ab98401 | 395 | { |
c153f45f | 396 | struct drm_map *map = data; |
55910517 | 397 | struct drm_map_list *maplist; |
7ab98401 DA |
398 | int err; |
399 | ||
7c1c2871 | 400 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
401 | return -EPERM; |
402 | ||
c153f45f EA |
403 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
404 | map->flags, &maplist); | |
7ab98401 | 405 | |
b5e89ed5 | 406 | if (err) |
7ab98401 | 407 | return err; |
d1f2b55a | 408 | |
67e1a014 | 409 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 410 | map->handle = (void *)(unsigned long)maplist->user_token; |
1da177e4 | 411 | return 0; |
88f399cd | 412 | } |
1da177e4 | 413 | |
1da177e4 LT |
414 | /** |
415 | * Remove a map private from list and deallocate resources if the mapping | |
416 | * isn't in use. | |
417 | * | |
1da177e4 LT |
418 | * Searches the map on drm_device::maplist, removes it from the list, see if |
419 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
420 | * being on use. | |
421 | * | |
7ab98401 | 422 | * \sa drm_addmap |
1da177e4 | 423 | */ |
f77d390c | 424 | int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 425 | { |
55910517 | 426 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 427 | drm_dma_handle_t dmah; |
bd1b331f | 428 | int found = 0; |
7c1c2871 | 429 | struct drm_master *master; |
1da177e4 | 430 | |
836cf046 | 431 | /* Find the list entry for the map and remove it */ |
bd1b331f | 432 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 433 | if (r_list->map == map) { |
7c1c2871 | 434 | master = r_list->master; |
bd1b331f | 435 | list_del(&r_list->head); |
1545085a TH |
436 | drm_ht_remove_key(&dev->map_hash, |
437 | r_list->user_token >> PAGE_SHIFT); | |
9a298b2a | 438 | kfree(r_list); |
bd1b331f | 439 | found = 1; |
836cf046 DA |
440 | break; |
441 | } | |
1da177e4 LT |
442 | } |
443 | ||
bd1b331f | 444 | if (!found) |
1da177e4 | 445 | return -EINVAL; |
1da177e4 | 446 | |
836cf046 DA |
447 | switch (map->type) { |
448 | case _DRM_REGISTERS: | |
004a7727 | 449 | iounmap(map->handle); |
836cf046 DA |
450 | /* FALLTHROUGH */ |
451 | case _DRM_FRAME_BUFFER: | |
452 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
453 | int retcode; | |
b5e89ed5 DA |
454 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
455 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 456 | } |
836cf046 DA |
457 | break; |
458 | case _DRM_SHM: | |
459 | vfree(map->handle); | |
7c1c2871 DA |
460 | if (master) { |
461 | if (dev->sigdata.lock == master->lock.hw_lock) | |
462 | dev->sigdata.lock = NULL; | |
463 | master->lock.hw_lock = NULL; /* SHM removed */ | |
464 | master->lock.file_priv = NULL; | |
171901d1 | 465 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 466 | } |
836cf046 DA |
467 | break; |
468 | case _DRM_AGP: | |
469 | case _DRM_SCATTER_GATHER: | |
470 | break; | |
471 | case _DRM_CONSISTENT: | |
472 | dmah.vaddr = map->handle; | |
473 | dmah.busaddr = map->offset; | |
474 | dmah.size = map->size; | |
475 | __drm_pci_free(dev, &dmah); | |
476 | break; | |
a2c0a97b JB |
477 | case _DRM_GEM: |
478 | DRM_ERROR("tried to rmmap GEM object\n"); | |
479 | break; | |
1da177e4 | 480 | } |
9a298b2a | 481 | kfree(map); |
836cf046 | 482 | |
1da177e4 LT |
483 | return 0; |
484 | } | |
4e74f36d | 485 | EXPORT_SYMBOL(drm_rmmap_locked); |
836cf046 | 486 | |
f77d390c | 487 | int drm_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 DA |
488 | { |
489 | int ret; | |
490 | ||
30e2fb18 | 491 | mutex_lock(&dev->struct_mutex); |
836cf046 | 492 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 493 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
494 | |
495 | return ret; | |
496 | } | |
ba8bbcf6 | 497 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 498 | |
836cf046 DA |
499 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
500 | * the last close of the device, and this is necessary for cleanup when things | |
501 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
502 | * like a pointless exercise since they're going away anyway. | |
503 | * | |
504 | * One use case might be after addmap is allowed for normal users for SHM and | |
505 | * gets used by drivers that the server doesn't need to care about. This seems | |
506 | * unlikely. | |
f77d390c BH |
507 | * |
508 | * \param inode device inode. | |
509 | * \param file_priv DRM file private. | |
510 | * \param cmd command. | |
511 | * \param arg pointer to a struct drm_map structure. | |
512 | * \return zero on success or a negative value on error. | |
836cf046 | 513 | */ |
c153f45f EA |
514 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
515 | struct drm_file *file_priv) | |
7ab98401 | 516 | { |
c153f45f | 517 | struct drm_map *request = data; |
f77d390c | 518 | struct drm_local_map *map = NULL; |
55910517 | 519 | struct drm_map_list *r_list; |
836cf046 | 520 | int ret; |
7ab98401 | 521 | |
30e2fb18 | 522 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 523 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 524 | if (r_list->map && |
c153f45f | 525 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
526 | r_list->map->flags & _DRM_REMOVABLE) { |
527 | map = r_list->map; | |
528 | break; | |
529 | } | |
530 | } | |
531 | ||
532 | /* List has wrapped around to the head pointer, or its empty we didn't | |
533 | * find anything. | |
534 | */ | |
bd1b331f | 535 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 536 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
537 | return -EINVAL; |
538 | } | |
539 | ||
836cf046 DA |
540 | /* Register and framebuffer maps are permanent */ |
541 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 542 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
543 | return 0; |
544 | } | |
545 | ||
546 | ret = drm_rmmap_locked(dev, map); | |
547 | ||
30e2fb18 | 548 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
549 | |
550 | return ret; | |
7ab98401 | 551 | } |
1da177e4 LT |
552 | |
553 | /** | |
554 | * Cleanup after an error on one of the addbufs() functions. | |
555 | * | |
836cf046 | 556 | * \param dev DRM device. |
1da177e4 LT |
557 | * \param entry buffer entry where the error occurred. |
558 | * | |
559 | * Frees any pages and buffers associated with the given entry. | |
560 | */ | |
cdd55a29 DA |
561 | static void drm_cleanup_buf_error(struct drm_device * dev, |
562 | struct drm_buf_entry * entry) | |
1da177e4 LT |
563 | { |
564 | int i; | |
565 | ||
566 | if (entry->seg_count) { | |
567 | for (i = 0; i < entry->seg_count; i++) { | |
568 | if (entry->seglist[i]) { | |
ddf19b97 | 569 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
570 | } |
571 | } | |
9a298b2a | 572 | kfree(entry->seglist); |
1da177e4 LT |
573 | |
574 | entry->seg_count = 0; | |
575 | } | |
576 | ||
b5e89ed5 DA |
577 | if (entry->buf_count) { |
578 | for (i = 0; i < entry->buf_count; i++) { | |
9a298b2a | 579 | kfree(entry->buflist[i].dev_private); |
1da177e4 | 580 | } |
9a298b2a | 581 | kfree(entry->buflist); |
1da177e4 LT |
582 | |
583 | entry->buf_count = 0; | |
584 | } | |
585 | } | |
586 | ||
587 | #if __OS_HAS_AGP | |
588 | /** | |
d59431bf | 589 | * Add AGP buffers for DMA transfers. |
1da177e4 | 590 | * |
84b1fd10 | 591 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 592 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 593 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 594 | * |
1da177e4 LT |
595 | * After some sanity checks creates a drm_buf structure for each buffer and |
596 | * reallocates the buffer list of the same size order to accommodate the new | |
597 | * buffers. | |
598 | */ | |
84b1fd10 | 599 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 600 | { |
cdd55a29 DA |
601 | struct drm_device_dma *dma = dev->dma; |
602 | struct drm_buf_entry *entry; | |
55910517 | 603 | struct drm_agp_mem *agp_entry; |
056219e2 | 604 | struct drm_buf *buf; |
1da177e4 LT |
605 | unsigned long offset; |
606 | unsigned long agp_offset; | |
607 | int count; | |
608 | int order; | |
609 | int size; | |
610 | int alignment; | |
611 | int page_order; | |
612 | int total; | |
613 | int byte_count; | |
54ba2f76 | 614 | int i, valid; |
056219e2 | 615 | struct drm_buf **temp_buflist; |
1da177e4 | 616 | |
b5e89ed5 DA |
617 | if (!dma) |
618 | return -EINVAL; | |
1da177e4 | 619 | |
d59431bf DA |
620 | count = request->count; |
621 | order = drm_order(request->size); | |
1da177e4 LT |
622 | size = 1 << order; |
623 | ||
b5e89ed5 DA |
624 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
625 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
626 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
627 | total = PAGE_SIZE << page_order; | |
628 | ||
629 | byte_count = 0; | |
d59431bf | 630 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 631 | |
b5e89ed5 DA |
632 | DRM_DEBUG("count: %d\n", count); |
633 | DRM_DEBUG("order: %d\n", order); | |
634 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 635 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
636 | DRM_DEBUG("alignment: %d\n", alignment); |
637 | DRM_DEBUG("page_order: %d\n", page_order); | |
638 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 639 | |
b5e89ed5 DA |
640 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
641 | return -EINVAL; | |
642 | if (dev->queue_count) | |
643 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 644 | |
54ba2f76 DA |
645 | /* Make sure buffers are located in AGP memory that we own */ |
646 | valid = 0; | |
bd1b331f | 647 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
648 | if ((agp_offset >= agp_entry->bound) && |
649 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
650 | valid = 1; | |
651 | break; | |
652 | } | |
653 | } | |
bd1b331f | 654 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
655 | DRM_DEBUG("zone invalid\n"); |
656 | return -EINVAL; | |
657 | } | |
b5e89ed5 DA |
658 | spin_lock(&dev->count_lock); |
659 | if (dev->buf_use) { | |
660 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
661 | return -EBUSY; |
662 | } | |
b5e89ed5 DA |
663 | atomic_inc(&dev->buf_alloc); |
664 | spin_unlock(&dev->count_lock); | |
1da177e4 | 665 | |
30e2fb18 | 666 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 667 | entry = &dma->bufs[order]; |
b5e89ed5 | 668 | if (entry->buf_count) { |
30e2fb18 | 669 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
670 | atomic_dec(&dev->buf_alloc); |
671 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
672 | } |
673 | ||
674 | if (count < 0 || count > 4096) { | |
30e2fb18 | 675 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 676 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
677 | return -EINVAL; |
678 | } | |
679 | ||
94e3370e | 680 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 681 | if (!entry->buflist) { |
30e2fb18 | 682 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 683 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
684 | return -ENOMEM; |
685 | } | |
1da177e4 LT |
686 | |
687 | entry->buf_size = size; | |
688 | entry->page_order = page_order; | |
689 | ||
690 | offset = 0; | |
691 | ||
b5e89ed5 DA |
692 | while (entry->buf_count < count) { |
693 | buf = &entry->buflist[entry->buf_count]; | |
694 | buf->idx = dma->buf_count + entry->buf_count; | |
695 | buf->total = alignment; | |
696 | buf->order = order; | |
697 | buf->used = 0; | |
1da177e4 | 698 | |
b5e89ed5 | 699 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
700 | buf->bus_address = agp_offset + offset; |
701 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 702 | buf->next = NULL; |
1da177e4 LT |
703 | buf->waiting = 0; |
704 | buf->pending = 0; | |
b5e89ed5 | 705 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 706 | buf->file_priv = NULL; |
1da177e4 LT |
707 | |
708 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 709 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 710 | if (!buf->dev_private) { |
1da177e4 LT |
711 | /* Set count correctly so we free the proper amount. */ |
712 | entry->buf_count = count; | |
b5e89ed5 | 713 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 714 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 715 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
716 | return -ENOMEM; |
717 | } | |
1da177e4 | 718 | |
b5e89ed5 | 719 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
720 | |
721 | offset += alignment; | |
722 | entry->buf_count++; | |
723 | byte_count += PAGE_SIZE << page_order; | |
724 | } | |
725 | ||
b5e89ed5 | 726 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 727 | |
9a298b2a EA |
728 | temp_buflist = krealloc(dma->buflist, |
729 | (dma->buf_count + entry->buf_count) * | |
730 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 731 | if (!temp_buflist) { |
1da177e4 | 732 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 733 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 734 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 735 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
736 | return -ENOMEM; |
737 | } | |
738 | dma->buflist = temp_buflist; | |
739 | ||
b5e89ed5 | 740 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
741 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
742 | } | |
743 | ||
744 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
745 | dma->seg_count += entry->seg_count; |
746 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
747 | dma->byte_count += byte_count; |
748 | ||
b5e89ed5 DA |
749 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
750 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 751 | |
30e2fb18 | 752 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 753 | |
d59431bf DA |
754 | request->count = entry->buf_count; |
755 | request->size = size; | |
1da177e4 LT |
756 | |
757 | dma->flags = _DRM_DMA_USE_AGP; | |
758 | ||
b5e89ed5 | 759 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
760 | return 0; |
761 | } | |
d84f76d3 | 762 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 763 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 764 | |
84b1fd10 | 765 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 766 | { |
cdd55a29 | 767 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
768 | int count; |
769 | int order; | |
770 | int size; | |
771 | int total; | |
772 | int page_order; | |
cdd55a29 | 773 | struct drm_buf_entry *entry; |
ddf19b97 | 774 | drm_dma_handle_t *dmah; |
056219e2 | 775 | struct drm_buf *buf; |
1da177e4 LT |
776 | int alignment; |
777 | unsigned long offset; | |
778 | int i; | |
779 | int byte_count; | |
780 | int page_count; | |
781 | unsigned long *temp_pagelist; | |
056219e2 | 782 | struct drm_buf **temp_buflist; |
1da177e4 | 783 | |
b5e89ed5 DA |
784 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
785 | return -EINVAL; | |
d985c108 | 786 | |
b5e89ed5 DA |
787 | if (!dma) |
788 | return -EINVAL; | |
1da177e4 | 789 | |
d985c108 DA |
790 | if (!capable(CAP_SYS_ADMIN)) |
791 | return -EPERM; | |
792 | ||
d59431bf DA |
793 | count = request->count; |
794 | order = drm_order(request->size); | |
1da177e4 LT |
795 | size = 1 << order; |
796 | ||
b5e89ed5 DA |
797 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
798 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 799 | |
b5e89ed5 DA |
800 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
801 | return -EINVAL; | |
802 | if (dev->queue_count) | |
803 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 804 | |
d59431bf | 805 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 806 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
807 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
808 | total = PAGE_SIZE << page_order; | |
809 | ||
b5e89ed5 DA |
810 | spin_lock(&dev->count_lock); |
811 | if (dev->buf_use) { | |
812 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
813 | return -EBUSY; |
814 | } | |
b5e89ed5 DA |
815 | atomic_inc(&dev->buf_alloc); |
816 | spin_unlock(&dev->count_lock); | |
1da177e4 | 817 | |
30e2fb18 | 818 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 819 | entry = &dma->bufs[order]; |
b5e89ed5 | 820 | if (entry->buf_count) { |
30e2fb18 | 821 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 822 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
823 | return -ENOMEM; /* May only call once for each order */ |
824 | } | |
825 | ||
826 | if (count < 0 || count > 4096) { | |
30e2fb18 | 827 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 828 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
829 | return -EINVAL; |
830 | } | |
831 | ||
94e3370e | 832 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 833 | if (!entry->buflist) { |
30e2fb18 | 834 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 835 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
836 | return -ENOMEM; |
837 | } | |
b5e89ed5 | 838 | |
94e3370e | 839 | entry->seglist = kzalloc(count * sizeof(*entry->seglist), GFP_KERNEL); |
b5e89ed5 | 840 | if (!entry->seglist) { |
9a298b2a | 841 | kfree(entry->buflist); |
30e2fb18 | 842 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 843 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
844 | return -ENOMEM; |
845 | } | |
1da177e4 LT |
846 | |
847 | /* Keep the original pagelist until we know all the allocations | |
848 | * have succeeded | |
849 | */ | |
9a298b2a EA |
850 | temp_pagelist = kmalloc((dma->page_count + (count << page_order)) * |
851 | sizeof(*dma->pagelist), GFP_KERNEL); | |
1da177e4 | 852 | if (!temp_pagelist) { |
9a298b2a EA |
853 | kfree(entry->buflist); |
854 | kfree(entry->seglist); | |
30e2fb18 | 855 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 856 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
857 | return -ENOMEM; |
858 | } | |
859 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
860 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
861 | DRM_DEBUG("pagelist: %d entries\n", | |
862 | dma->page_count + (count << page_order)); | |
1da177e4 | 863 | |
b5e89ed5 | 864 | entry->buf_size = size; |
1da177e4 LT |
865 | entry->page_order = page_order; |
866 | byte_count = 0; | |
867 | page_count = 0; | |
868 | ||
b5e89ed5 | 869 | while (entry->buf_count < count) { |
bc5f4523 | 870 | |
e6be8d9d | 871 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000); |
bc5f4523 | 872 | |
ddf19b97 | 873 | if (!dmah) { |
1da177e4 LT |
874 | /* Set count correctly so we free the proper amount. */ |
875 | entry->buf_count = count; | |
876 | entry->seg_count = count; | |
877 | drm_cleanup_buf_error(dev, entry); | |
9a298b2a | 878 | kfree(temp_pagelist); |
30e2fb18 | 879 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 880 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
881 | return -ENOMEM; |
882 | } | |
ddf19b97 | 883 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
884 | for (i = 0; i < (1 << page_order); i++) { |
885 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
886 | dma->page_count + page_count, | |
ddf19b97 | 887 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 888 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 889 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 890 | } |
b5e89ed5 DA |
891 | for (offset = 0; |
892 | offset + size <= total && entry->buf_count < count; | |
893 | offset += alignment, ++entry->buf_count) { | |
894 | buf = &entry->buflist[entry->buf_count]; | |
895 | buf->idx = dma->buf_count + entry->buf_count; | |
896 | buf->total = alignment; | |
897 | buf->order = order; | |
898 | buf->used = 0; | |
899 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
900 | buf->address = (void *)(dmah->vaddr + offset); |
901 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 902 | buf->next = NULL; |
1da177e4 LT |
903 | buf->waiting = 0; |
904 | buf->pending = 0; | |
b5e89ed5 | 905 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 906 | buf->file_priv = NULL; |
1da177e4 LT |
907 | |
908 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e DB |
909 | buf->dev_private = kzalloc(buf->dev_priv_size, |
910 | GFP_KERNEL); | |
b5e89ed5 | 911 | if (!buf->dev_private) { |
1da177e4 LT |
912 | /* Set count correctly so we free the proper amount. */ |
913 | entry->buf_count = count; | |
914 | entry->seg_count = count; | |
b5e89ed5 | 915 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 916 | kfree(temp_pagelist); |
30e2fb18 | 917 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 918 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
919 | return -ENOMEM; |
920 | } | |
1da177e4 | 921 | |
b5e89ed5 DA |
922 | DRM_DEBUG("buffer %d @ %p\n", |
923 | entry->buf_count, buf->address); | |
1da177e4 LT |
924 | } |
925 | byte_count += PAGE_SIZE << page_order; | |
926 | } | |
927 | ||
9a298b2a EA |
928 | temp_buflist = krealloc(dma->buflist, |
929 | (dma->buf_count + entry->buf_count) * | |
930 | sizeof(*dma->buflist), GFP_KERNEL); | |
1da177e4 LT |
931 | if (!temp_buflist) { |
932 | /* Free the entry because it isn't valid */ | |
b5e89ed5 | 933 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 934 | kfree(temp_pagelist); |
30e2fb18 | 935 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 936 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
937 | return -ENOMEM; |
938 | } | |
939 | dma->buflist = temp_buflist; | |
940 | ||
b5e89ed5 | 941 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
942 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
943 | } | |
944 | ||
88393161 | 945 | /* No allocations failed, so now we can replace the original pagelist |
1da177e4 LT |
946 | * with the new one. |
947 | */ | |
948 | if (dma->page_count) { | |
9a298b2a | 949 | kfree(dma->pagelist); |
1da177e4 LT |
950 | } |
951 | dma->pagelist = temp_pagelist; | |
952 | ||
953 | dma->buf_count += entry->buf_count; | |
954 | dma->seg_count += entry->seg_count; | |
955 | dma->page_count += entry->seg_count << page_order; | |
956 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
957 | ||
30e2fb18 | 958 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 959 | |
d59431bf DA |
960 | request->count = entry->buf_count; |
961 | request->size = size; | |
1da177e4 | 962 | |
3417f33e GS |
963 | if (request->flags & _DRM_PCI_BUFFER_RO) |
964 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
965 | ||
b5e89ed5 | 966 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
967 | return 0; |
968 | ||
969 | } | |
d84f76d3 | 970 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 971 | |
84b1fd10 | 972 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 973 | { |
cdd55a29 DA |
974 | struct drm_device_dma *dma = dev->dma; |
975 | struct drm_buf_entry *entry; | |
056219e2 | 976 | struct drm_buf *buf; |
1da177e4 LT |
977 | unsigned long offset; |
978 | unsigned long agp_offset; | |
979 | int count; | |
980 | int order; | |
981 | int size; | |
982 | int alignment; | |
983 | int page_order; | |
984 | int total; | |
985 | int byte_count; | |
986 | int i; | |
056219e2 | 987 | struct drm_buf **temp_buflist; |
1da177e4 | 988 | |
b5e89ed5 DA |
989 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
990 | return -EINVAL; | |
991 | ||
992 | if (!dma) | |
993 | return -EINVAL; | |
1da177e4 | 994 | |
d985c108 DA |
995 | if (!capable(CAP_SYS_ADMIN)) |
996 | return -EPERM; | |
997 | ||
d59431bf DA |
998 | count = request->count; |
999 | order = drm_order(request->size); | |
1da177e4 LT |
1000 | size = 1 << order; |
1001 | ||
b5e89ed5 DA |
1002 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
1003 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
1004 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
1005 | total = PAGE_SIZE << page_order; | |
1006 | ||
1007 | byte_count = 0; | |
d59431bf | 1008 | agp_offset = request->agp_start; |
1da177e4 | 1009 | |
b5e89ed5 DA |
1010 | DRM_DEBUG("count: %d\n", count); |
1011 | DRM_DEBUG("order: %d\n", order); | |
1012 | DRM_DEBUG("size: %d\n", size); | |
1013 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1014 | DRM_DEBUG("alignment: %d\n", alignment); | |
1015 | DRM_DEBUG("page_order: %d\n", page_order); | |
1016 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1017 | |
b5e89ed5 DA |
1018 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1019 | return -EINVAL; | |
1020 | if (dev->queue_count) | |
1021 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1022 | |
b5e89ed5 DA |
1023 | spin_lock(&dev->count_lock); |
1024 | if (dev->buf_use) { | |
1025 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1026 | return -EBUSY; |
1027 | } | |
b5e89ed5 DA |
1028 | atomic_inc(&dev->buf_alloc); |
1029 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1030 | |
30e2fb18 | 1031 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1032 | entry = &dma->bufs[order]; |
b5e89ed5 | 1033 | if (entry->buf_count) { |
30e2fb18 | 1034 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1035 | atomic_dec(&dev->buf_alloc); |
1036 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1037 | } |
1038 | ||
1039 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1040 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1041 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1042 | return -EINVAL; |
1043 | } | |
1044 | ||
94e3370e | 1045 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1046 | GFP_KERNEL); |
b5e89ed5 | 1047 | if (!entry->buflist) { |
30e2fb18 | 1048 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1049 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1050 | return -ENOMEM; |
1051 | } | |
1da177e4 LT |
1052 | |
1053 | entry->buf_size = size; | |
1054 | entry->page_order = page_order; | |
1055 | ||
1056 | offset = 0; | |
1057 | ||
b5e89ed5 DA |
1058 | while (entry->buf_count < count) { |
1059 | buf = &entry->buflist[entry->buf_count]; | |
1060 | buf->idx = dma->buf_count + entry->buf_count; | |
1061 | buf->total = alignment; | |
1062 | buf->order = order; | |
1063 | buf->used = 0; | |
1da177e4 | 1064 | |
b5e89ed5 | 1065 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1066 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1067 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1068 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1069 | buf->next = NULL; |
1da177e4 LT |
1070 | buf->waiting = 0; |
1071 | buf->pending = 0; | |
b5e89ed5 | 1072 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 1073 | buf->file_priv = NULL; |
1da177e4 LT |
1074 | |
1075 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1076 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 1077 | if (!buf->dev_private) { |
1da177e4 LT |
1078 | /* Set count correctly so we free the proper amount. */ |
1079 | entry->buf_count = count; | |
b5e89ed5 | 1080 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1081 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1082 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1083 | return -ENOMEM; |
1084 | } | |
1085 | ||
b5e89ed5 | 1086 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1087 | |
1088 | offset += alignment; | |
1089 | entry->buf_count++; | |
1090 | byte_count += PAGE_SIZE << page_order; | |
1091 | } | |
1092 | ||
b5e89ed5 | 1093 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1094 | |
9a298b2a EA |
1095 | temp_buflist = krealloc(dma->buflist, |
1096 | (dma->buf_count + entry->buf_count) * | |
1097 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 1098 | if (!temp_buflist) { |
1da177e4 | 1099 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1100 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1101 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1102 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1103 | return -ENOMEM; |
1104 | } | |
1105 | dma->buflist = temp_buflist; | |
1106 | ||
b5e89ed5 | 1107 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1108 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1109 | } | |
1110 | ||
1111 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1112 | dma->seg_count += entry->seg_count; |
1113 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1114 | dma->byte_count += byte_count; |
1115 | ||
b5e89ed5 DA |
1116 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1117 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1118 | |
30e2fb18 | 1119 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1120 | |
d59431bf DA |
1121 | request->count = entry->buf_count; |
1122 | request->size = size; | |
1da177e4 LT |
1123 | |
1124 | dma->flags = _DRM_DMA_USE_SG; | |
1125 | ||
b5e89ed5 | 1126 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1127 | return 0; |
1128 | } | |
1129 | ||
84b1fd10 | 1130 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1131 | { |
cdd55a29 DA |
1132 | struct drm_device_dma *dma = dev->dma; |
1133 | struct drm_buf_entry *entry; | |
056219e2 | 1134 | struct drm_buf *buf; |
b84397d6 DA |
1135 | unsigned long offset; |
1136 | unsigned long agp_offset; | |
1137 | int count; | |
1138 | int order; | |
1139 | int size; | |
1140 | int alignment; | |
1141 | int page_order; | |
1142 | int total; | |
1143 | int byte_count; | |
1144 | int i; | |
056219e2 | 1145 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1146 | |
1147 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1148 | return -EINVAL; | |
b5e89ed5 | 1149 | |
b84397d6 DA |
1150 | if (!dma) |
1151 | return -EINVAL; | |
1152 | ||
d985c108 DA |
1153 | if (!capable(CAP_SYS_ADMIN)) |
1154 | return -EPERM; | |
1155 | ||
d59431bf DA |
1156 | count = request->count; |
1157 | order = drm_order(request->size); | |
b84397d6 DA |
1158 | size = 1 << order; |
1159 | ||
d59431bf | 1160 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1161 | ? PAGE_ALIGN(size) : size; |
1162 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1163 | total = PAGE_SIZE << page_order; | |
1164 | ||
1165 | byte_count = 0; | |
d59431bf | 1166 | agp_offset = request->agp_start; |
b84397d6 DA |
1167 | |
1168 | DRM_DEBUG("count: %d\n", count); | |
1169 | DRM_DEBUG("order: %d\n", order); | |
1170 | DRM_DEBUG("size: %d\n", size); | |
1171 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1172 | DRM_DEBUG("alignment: %d\n", alignment); | |
1173 | DRM_DEBUG("page_order: %d\n", page_order); | |
1174 | DRM_DEBUG("total: %d\n", total); | |
1175 | ||
1176 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1177 | return -EINVAL; | |
1178 | if (dev->queue_count) | |
1179 | return -EBUSY; /* Not while in use */ | |
1180 | ||
1181 | spin_lock(&dev->count_lock); | |
1182 | if (dev->buf_use) { | |
1183 | spin_unlock(&dev->count_lock); | |
1184 | return -EBUSY; | |
1185 | } | |
1186 | atomic_inc(&dev->buf_alloc); | |
1187 | spin_unlock(&dev->count_lock); | |
1188 | ||
30e2fb18 | 1189 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1190 | entry = &dma->bufs[order]; |
1191 | if (entry->buf_count) { | |
30e2fb18 | 1192 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1193 | atomic_dec(&dev->buf_alloc); |
1194 | return -ENOMEM; /* May only call once for each order */ | |
1195 | } | |
1196 | ||
1197 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1198 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1199 | atomic_dec(&dev->buf_alloc); |
1200 | return -EINVAL; | |
1201 | } | |
1202 | ||
94e3370e | 1203 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1204 | GFP_KERNEL); |
b84397d6 | 1205 | if (!entry->buflist) { |
30e2fb18 | 1206 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1207 | atomic_dec(&dev->buf_alloc); |
1208 | return -ENOMEM; | |
1209 | } | |
b84397d6 DA |
1210 | |
1211 | entry->buf_size = size; | |
1212 | entry->page_order = page_order; | |
1213 | ||
1214 | offset = 0; | |
1215 | ||
1216 | while (entry->buf_count < count) { | |
1217 | buf = &entry->buflist[entry->buf_count]; | |
1218 | buf->idx = dma->buf_count + entry->buf_count; | |
1219 | buf->total = alignment; | |
1220 | buf->order = order; | |
1221 | buf->used = 0; | |
1222 | ||
1223 | buf->offset = (dma->byte_count + offset); | |
1224 | buf->bus_address = agp_offset + offset; | |
1225 | buf->address = (void *)(agp_offset + offset); | |
1226 | buf->next = NULL; | |
1227 | buf->waiting = 0; | |
1228 | buf->pending = 0; | |
1229 | init_waitqueue_head(&buf->dma_wait); | |
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 | |
1da177e4 LT |
1308 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1309 | return -EINVAL; | |
1310 | ||
1da177e4 | 1311 | #if __OS_HAS_AGP |
c153f45f EA |
1312 | if (request->flags & _DRM_AGP_BUFFER) |
1313 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1314 | else |
1315 | #endif | |
c153f45f EA |
1316 | if (request->flags & _DRM_SG_BUFFER) |
1317 | ret = drm_addbufs_sg(dev, request); | |
1318 | else if (request->flags & _DRM_FB_BUFFER) | |
1319 | ret = drm_addbufs_fb(dev, request); | |
1da177e4 | 1320 | else |
c153f45f | 1321 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1322 | |
d59431bf | 1323 | return ret; |
1da177e4 LT |
1324 | } |
1325 | ||
1da177e4 LT |
1326 | /** |
1327 | * Get information about the buffer mappings. | |
1328 | * | |
1329 | * This was originally mean for debugging purposes, or by a sophisticated | |
1330 | * client library to determine how best to use the available buffers (e.g., | |
1331 | * large buffers can be used for image transfer). | |
1332 | * | |
1333 | * \param inode device inode. | |
6c340eac | 1334 | * \param file_priv DRM file private. |
1da177e4 LT |
1335 | * \param cmd command. |
1336 | * \param arg pointer to a drm_buf_info structure. | |
1337 | * \return zero on success or a negative number on failure. | |
1338 | * | |
1339 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1340 | * lock, preventing of allocating more buffers after this call. Information | |
1341 | * about each requested buffer is then copied into user space. | |
1342 | */ | |
c153f45f EA |
1343 | int drm_infobufs(struct drm_device *dev, void *data, |
1344 | struct drm_file *file_priv) | |
1da177e4 | 1345 | { |
cdd55a29 | 1346 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1347 | struct drm_buf_info *request = data; |
1da177e4 LT |
1348 | int i; |
1349 | int count; | |
1350 | ||
1351 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1352 | return -EINVAL; | |
1353 | ||
b5e89ed5 DA |
1354 | if (!dma) |
1355 | return -EINVAL; | |
1da177e4 | 1356 | |
b5e89ed5 DA |
1357 | spin_lock(&dev->count_lock); |
1358 | if (atomic_read(&dev->buf_alloc)) { | |
1359 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1360 | return -EBUSY; |
1361 | } | |
1362 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1363 | spin_unlock(&dev->count_lock); |
1da177e4 | 1364 | |
b5e89ed5 DA |
1365 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1366 | if (dma->bufs[i].buf_count) | |
1367 | ++count; | |
1da177e4 LT |
1368 | } |
1369 | ||
b5e89ed5 | 1370 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1371 | |
c153f45f | 1372 | if (request->count >= count) { |
b5e89ed5 DA |
1373 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1374 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1375 | struct drm_buf_desc __user *to = |
c153f45f | 1376 | &request->list[count]; |
cdd55a29 DA |
1377 | struct drm_buf_entry *from = &dma->bufs[i]; |
1378 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1379 | if (copy_to_user(&to->count, |
1380 | &from->buf_count, | |
1381 | sizeof(from->buf_count)) || | |
1382 | copy_to_user(&to->size, | |
1383 | &from->buf_size, | |
1384 | sizeof(from->buf_size)) || | |
1385 | copy_to_user(&to->low_mark, | |
1386 | &list->low_mark, | |
1387 | sizeof(list->low_mark)) || | |
1388 | copy_to_user(&to->high_mark, | |
1389 | &list->high_mark, | |
1390 | sizeof(list->high_mark))) | |
1da177e4 LT |
1391 | return -EFAULT; |
1392 | ||
b5e89ed5 DA |
1393 | DRM_DEBUG("%d %d %d %d %d\n", |
1394 | i, | |
1395 | dma->bufs[i].buf_count, | |
1396 | dma->bufs[i].buf_size, | |
1397 | dma->bufs[i].freelist.low_mark, | |
1398 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1399 | ++count; |
1400 | } | |
1401 | } | |
1402 | } | |
c153f45f | 1403 | request->count = count; |
1da177e4 LT |
1404 | |
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | /** | |
1409 | * Specifies a low and high water mark for buffer allocation | |
1410 | * | |
1411 | * \param inode device inode. | |
6c340eac | 1412 | * \param file_priv DRM file private. |
1da177e4 LT |
1413 | * \param cmd command. |
1414 | * \param arg a pointer to a drm_buf_desc structure. | |
1415 | * \return zero on success or a negative number on failure. | |
1416 | * | |
1417 | * Verifies that the size order is bounded between the admissible orders and | |
1418 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1419 | * | |
1420 | * \note This ioctl is deprecated and mostly never used. | |
1421 | */ | |
c153f45f EA |
1422 | int drm_markbufs(struct drm_device *dev, void *data, |
1423 | struct drm_file *file_priv) | |
1da177e4 | 1424 | { |
cdd55a29 | 1425 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1426 | struct drm_buf_desc *request = data; |
1da177e4 | 1427 | int order; |
cdd55a29 | 1428 | struct drm_buf_entry *entry; |
1da177e4 LT |
1429 | |
1430 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1431 | return -EINVAL; | |
1432 | ||
b5e89ed5 DA |
1433 | if (!dma) |
1434 | return -EINVAL; | |
1da177e4 | 1435 | |
b5e89ed5 | 1436 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f EA |
1437 | request->size, request->low_mark, request->high_mark); |
1438 | order = drm_order(request->size); | |
b5e89ed5 DA |
1439 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1440 | return -EINVAL; | |
1da177e4 LT |
1441 | entry = &dma->bufs[order]; |
1442 | ||
c153f45f | 1443 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1444 | return -EINVAL; |
c153f45f | 1445 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1446 | return -EINVAL; |
1447 | ||
c153f45f EA |
1448 | entry->freelist.low_mark = request->low_mark; |
1449 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1450 | |
1451 | return 0; | |
1452 | } | |
1453 | ||
1454 | /** | |
b5e89ed5 | 1455 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1456 | * |
1457 | * \param inode device inode. | |
6c340eac | 1458 | * \param file_priv DRM file private. |
1da177e4 LT |
1459 | * \param cmd command. |
1460 | * \param arg pointer to a drm_buf_free structure. | |
1461 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1462 | * |
1da177e4 LT |
1463 | * Calls free_buffer() for each used buffer. |
1464 | * This function is primarily used for debugging. | |
1465 | */ | |
c153f45f EA |
1466 | int drm_freebufs(struct drm_device *dev, void *data, |
1467 | struct drm_file *file_priv) | |
1da177e4 | 1468 | { |
cdd55a29 | 1469 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1470 | struct drm_buf_free *request = data; |
1da177e4 LT |
1471 | int i; |
1472 | int idx; | |
056219e2 | 1473 | struct drm_buf *buf; |
1da177e4 LT |
1474 | |
1475 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1476 | return -EINVAL; | |
1477 | ||
b5e89ed5 DA |
1478 | if (!dma) |
1479 | return -EINVAL; | |
1da177e4 | 1480 | |
c153f45f EA |
1481 | DRM_DEBUG("%d\n", request->count); |
1482 | for (i = 0; i < request->count; i++) { | |
1483 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1484 | return -EFAULT; |
b5e89ed5 DA |
1485 | if (idx < 0 || idx >= dma->buf_count) { |
1486 | DRM_ERROR("Index %d (of %d max)\n", | |
1487 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1488 | return -EINVAL; |
1489 | } | |
1490 | buf = dma->buflist[idx]; | |
6c340eac | 1491 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1492 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1493 | task_pid_nr(current)); |
1da177e4 LT |
1494 | return -EINVAL; |
1495 | } | |
b5e89ed5 | 1496 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1497 | } |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
1502 | /** | |
1503 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1504 | * | |
1505 | * \param inode device inode. | |
6c340eac | 1506 | * \param file_priv DRM file private. |
1da177e4 LT |
1507 | * \param cmd command. |
1508 | * \param arg pointer to a drm_buf_map structure. | |
1509 | * \return zero on success or a negative number on failure. | |
1510 | * | |
3417f33e GS |
1511 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1512 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1513 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1514 | * drm_mmap_dma(). | |
1da177e4 | 1515 | */ |
c153f45f EA |
1516 | int drm_mapbufs(struct drm_device *dev, void *data, |
1517 | struct drm_file *file_priv) | |
1da177e4 | 1518 | { |
cdd55a29 | 1519 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1520 | int retcode = 0; |
1521 | const int zero = 0; | |
1522 | unsigned long virtual; | |
1523 | unsigned long address; | |
c153f45f | 1524 | struct drm_buf_map *request = data; |
1da177e4 LT |
1525 | int i; |
1526 | ||
1527 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1528 | return -EINVAL; | |
1529 | ||
b5e89ed5 DA |
1530 | if (!dma) |
1531 | return -EINVAL; | |
1da177e4 | 1532 | |
b5e89ed5 DA |
1533 | spin_lock(&dev->count_lock); |
1534 | if (atomic_read(&dev->buf_alloc)) { | |
1535 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1536 | return -EBUSY; |
1537 | } | |
1538 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1539 | spin_unlock(&dev->count_lock); |
1da177e4 | 1540 | |
c153f45f | 1541 | if (request->count >= dma->buf_count) { |
b84397d6 | 1542 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1543 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1544 | && (dma->flags & _DRM_DMA_USE_SG)) |
1545 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1546 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
f77d390c | 1547 | struct drm_local_map *map = dev->agp_buffer_map; |
d1f2b55a | 1548 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1549 | |
b5e89ed5 | 1550 | if (!map) { |
1da177e4 LT |
1551 | retcode = -EINVAL; |
1552 | goto done; | |
1553 | } | |
b5e89ed5 | 1554 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1555 | virtual = do_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1556 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1557 | MAP_SHARED, |
1558 | token); | |
b5e89ed5 | 1559 | up_write(¤t->mm->mmap_sem); |
1da177e4 | 1560 | } else { |
b5e89ed5 | 1561 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1562 | virtual = do_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1563 | PROT_READ | PROT_WRITE, |
1564 | MAP_SHARED, 0); | |
1565 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1566 | } |
b5e89ed5 | 1567 | if (virtual > -1024UL) { |
1da177e4 LT |
1568 | /* Real error */ |
1569 | retcode = (signed long)virtual; | |
1570 | goto done; | |
1571 | } | |
c153f45f | 1572 | request->virtual = (void __user *)virtual; |
1da177e4 | 1573 | |
b5e89ed5 | 1574 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1575 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1576 | &dma->buflist[i]->idx, |
c153f45f | 1577 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1578 | retcode = -EFAULT; |
1579 | goto done; | |
1580 | } | |
c153f45f | 1581 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1582 | &dma->buflist[i]->total, |
c153f45f | 1583 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1584 | retcode = -EFAULT; |
1585 | goto done; | |
1586 | } | |
c153f45f | 1587 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1588 | &zero, sizeof(zero))) { |
1da177e4 LT |
1589 | retcode = -EFAULT; |
1590 | goto done; | |
1591 | } | |
b5e89ed5 | 1592 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1593 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1594 | &address, sizeof(address))) { |
1da177e4 LT |
1595 | retcode = -EFAULT; |
1596 | goto done; | |
1597 | } | |
1598 | } | |
1599 | } | |
b5e89ed5 | 1600 | done: |
c153f45f EA |
1601 | request->count = dma->buf_count; |
1602 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1603 | |
1604 | return retcode; | |
1605 | } | |
1606 | ||
836cf046 DA |
1607 | /** |
1608 | * Compute size order. Returns the exponent of the smaller power of two which | |
1609 | * is greater or equal to given number. | |
b5e89ed5 | 1610 | * |
836cf046 DA |
1611 | * \param size size. |
1612 | * \return order. | |
1613 | * | |
1614 | * \todo Can be made faster. | |
1615 | */ | |
b5e89ed5 | 1616 | int drm_order(unsigned long size) |
836cf046 DA |
1617 | { |
1618 | int order; | |
1619 | unsigned long tmp; | |
1620 | ||
b5e89ed5 | 1621 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1622 | |
1623 | if (size & (size - 1)) | |
1624 | ++order; | |
1625 | ||
1626 | return order; | |
1627 | } | |
1628 | EXPORT_SYMBOL(drm_order); |