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 | |
66aa6962 TV |
49 | * while PCI resources may live above that, we only compare the |
50 | * lower 32 bits of the map offset for maps of type | |
51 | * _DRM_FRAMEBUFFER or _DRM_REGISTERS. | |
52 | * It is assumed that if a driver have more than one resource | |
53 | * of each type, the lower 32 bits are different. | |
41c2e75e BH |
54 | */ |
55 | if (!entry->map || | |
56 | map->type != entry->map->type || | |
57 | entry->master != dev->primary->master) | |
58 | continue; | |
59 | switch (map->type) { | |
60 | case _DRM_SHM: | |
61 | if (map->flags != _DRM_CONTAINS_LOCK) | |
62 | break; | |
66aa6962 | 63 | return entry; |
41c2e75e BH |
64 | case _DRM_REGISTERS: |
65 | case _DRM_FRAME_BUFFER: | |
66aa6962 TV |
66 | if ((entry->map->offset & 0xffffffff) == |
67 | (map->offset & 0xffffffff)) | |
68 | return entry; | |
41c2e75e BH |
69 | default: /* Make gcc happy */ |
70 | ; | |
836cf046 | 71 | } |
41c2e75e BH |
72 | if (entry->map->offset == map->offset) |
73 | return entry; | |
836cf046 DA |
74 | } |
75 | ||
76 | return NULL; | |
1da177e4 | 77 | } |
1da177e4 | 78 | |
e0be428e | 79 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
f1a2a9b6 | 80 | unsigned long user_token, int hashed_handle, int shm) |
d1f2b55a | 81 | { |
f1a2a9b6 DM |
82 | int use_hashed_handle, shift; |
83 | unsigned long add; | |
84 | ||
c2604ce0 | 85 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
86 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
87 | #elif (BITS_PER_LONG == 32) | |
88 | use_hashed_handle = hashed_handle; | |
89 | #else | |
90 | #error Unsupported long size. Neither 64 nor 32 bits. | |
91 | #endif | |
d1f2b55a | 92 | |
e08870c8 TH |
93 | if (!use_hashed_handle) { |
94 | int ret; | |
1545085a | 95 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
96 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
97 | if (ret != -EINVAL) | |
98 | return ret; | |
d1f2b55a | 99 | } |
f1a2a9b6 DM |
100 | |
101 | shift = 0; | |
102 | add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT; | |
103 | if (shm && (SHMLBA > PAGE_SIZE)) { | |
104 | int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1; | |
105 | ||
106 | /* For shared memory, we have to preserve the SHMLBA | |
107 | * bits of the eventual vma->vm_pgoff value during | |
108 | * mmap(). Otherwise we run into cache aliasing problems | |
109 | * on some platforms. On these platforms, the pgoff of | |
110 | * a mmap() request is used to pick a suitable virtual | |
111 | * address for the mmap() region such that it will not | |
112 | * cause cache aliasing problems. | |
113 | * | |
114 | * Therefore, make sure the SHMLBA relevant bits of the | |
115 | * hash value we use are equal to those in the original | |
116 | * kernel virtual address. | |
117 | */ | |
118 | shift = bits; | |
119 | add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL)); | |
120 | } | |
121 | ||
e08870c8 TH |
122 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
123 | user_token, 32 - PAGE_SHIFT - 3, | |
f1a2a9b6 | 124 | shift, add); |
d1f2b55a | 125 | } |
9a186645 | 126 | |
1da177e4 | 127 | /** |
f77d390c BH |
128 | * Core function to create a range of memory available for mapping by a |
129 | * non-root process. | |
1da177e4 LT |
130 | * |
131 | * Adjusts the memory offset to its absolute value according to the mapping | |
132 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
133 | * applicable and if supported by the kernel. | |
134 | */ | |
41c2e75e | 135 | static int drm_addmap_core(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 136 | unsigned int size, enum drm_map_type type, |
55910517 DA |
137 | enum drm_map_flags flags, |
138 | struct drm_map_list ** maplist) | |
1da177e4 | 139 | { |
f77d390c | 140 | struct drm_local_map *map; |
55910517 | 141 | struct drm_map_list *list; |
9c8da5eb | 142 | drm_dma_handle_t *dmah; |
8d153f71 TH |
143 | unsigned long user_token; |
144 | int ret; | |
1da177e4 | 145 | |
9a298b2a | 146 | map = kmalloc(sizeof(*map), GFP_KERNEL); |
b5e89ed5 | 147 | if (!map) |
1da177e4 LT |
148 | return -ENOMEM; |
149 | ||
7ab98401 DA |
150 | map->offset = offset; |
151 | map->size = size; | |
152 | map->flags = flags; | |
153 | map->type = type; | |
1da177e4 LT |
154 | |
155 | /* Only allow shared memory to be removable since we only keep enough | |
156 | * book keeping information about shared memory to allow for removal | |
157 | * when processes fork. | |
158 | */ | |
b5e89ed5 | 159 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
9a298b2a | 160 | kfree(map); |
1da177e4 LT |
161 | return -EINVAL; |
162 | } | |
41c2e75e BH |
163 | DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n", |
164 | (unsigned long long)map->offset, map->size, map->type); | |
b6741377 BH |
165 | |
166 | /* page-align _DRM_SHM maps. They are allocated here so there is no security | |
167 | * hole created by that and it works around various broken drivers that use | |
168 | * a non-aligned quantity to map the SAREA. --BenH | |
169 | */ | |
170 | if (map->type == _DRM_SHM) | |
171 | map->size = PAGE_ALIGN(map->size); | |
172 | ||
41c2e75e | 173 | if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) { |
9a298b2a | 174 | kfree(map); |
1da177e4 LT |
175 | return -EINVAL; |
176 | } | |
b5e89ed5 | 177 | map->mtrr = -1; |
1da177e4 LT |
178 | map->handle = NULL; |
179 | ||
b5e89ed5 | 180 | switch (map->type) { |
1da177e4 LT |
181 | case _DRM_REGISTERS: |
182 | case _DRM_FRAME_BUFFER: | |
4b7fb9b5 | 183 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__arm__) |
8d2ea625 | 184 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 | 185 | map->offset < virt_to_phys(high_memory)) { |
9a298b2a | 186 | kfree(map); |
1da177e4 LT |
187 | return -EINVAL; |
188 | } | |
1da177e4 | 189 | #endif |
836cf046 DA |
190 | /* Some drivers preinitialize some maps, without the X Server |
191 | * needing to be aware of it. Therefore, we just return success | |
192 | * when the server tries to create a duplicate map. | |
193 | */ | |
89625eb1 DA |
194 | list = drm_find_matching_map(dev, map); |
195 | if (list != NULL) { | |
196 | if (list->map->size != map->size) { | |
836cf046 | 197 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
198 | "mismatched sizes, (%ld vs %ld)\n", |
199 | map->type, map->size, | |
200 | list->map->size); | |
89625eb1 | 201 | list->map->size = map->size; |
836cf046 DA |
202 | } |
203 | ||
9a298b2a | 204 | kfree(map); |
89625eb1 | 205 | *maplist = list; |
836cf046 DA |
206 | return 0; |
207 | } | |
208 | ||
1da177e4 | 209 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
210 | if (map->type == _DRM_FRAME_BUFFER || |
211 | (map->flags & _DRM_WRITE_COMBINING)) { | |
212 | map->mtrr = mtrr_add(map->offset, map->size, | |
213 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
214 | } |
215 | } | |
0769d39c | 216 | if (map->type == _DRM_REGISTERS) { |
004a7727 | 217 | map->handle = ioremap(map->offset, map->size); |
0769d39c | 218 | if (!map->handle) { |
9a298b2a | 219 | kfree(map); |
0769d39c ST |
220 | return -ENOMEM; |
221 | } | |
222 | } | |
bc5f4523 | 223 | |
1da177e4 | 224 | break; |
1da177e4 | 225 | case _DRM_SHM: |
54ba2f76 DA |
226 | list = drm_find_matching_map(dev, map); |
227 | if (list != NULL) { | |
228 | if(list->map->size != map->size) { | |
229 | DRM_DEBUG("Matching maps of type %d with " | |
230 | "mismatched sizes, (%ld vs %ld)\n", | |
231 | map->type, map->size, list->map->size); | |
232 | list->map->size = map->size; | |
233 | } | |
234 | ||
9a298b2a | 235 | kfree(map); |
54ba2f76 DA |
236 | *maplist = list; |
237 | return 0; | |
238 | } | |
f239b7b0 | 239 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
240 | DRM_DEBUG("%lu %d %p\n", |
241 | map->size, drm_order(map->size), map->handle); | |
242 | if (!map->handle) { | |
9a298b2a | 243 | kfree(map); |
1da177e4 LT |
244 | return -ENOMEM; |
245 | } | |
246 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 247 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 248 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
7c1c2871 | 249 | if (dev->primary->master->lock.hw_lock != NULL) { |
b5e89ed5 | 250 | vfree(map->handle); |
9a298b2a | 251 | kfree(map); |
1da177e4 LT |
252 | return -EBUSY; |
253 | } | |
7c1c2871 | 254 | dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
255 | } |
256 | break; | |
54ba2f76 | 257 | case _DRM_AGP: { |
55910517 | 258 | struct drm_agp_mem *entry; |
54ba2f76 DA |
259 | int valid = 0; |
260 | ||
261 | if (!drm_core_has_AGP(dev)) { | |
9a298b2a | 262 | kfree(map); |
54ba2f76 DA |
263 | return -EINVAL; |
264 | } | |
1da177e4 | 265 | #ifdef __alpha__ |
54ba2f76 | 266 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 267 | #endif |
47a184a8 EA |
268 | /* In some cases (i810 driver), user space may have already |
269 | * added the AGP base itself, because dev->agp->base previously | |
270 | * only got set during AGP enable. So, only add the base | |
271 | * address if the map's offset isn't already within the | |
272 | * aperture. | |
54ba2f76 | 273 | */ |
47a184a8 EA |
274 | if (map->offset < dev->agp->base || |
275 | map->offset > dev->agp->base + | |
276 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
277 | map->offset += dev->agp->base; | |
278 | } | |
54ba2f76 DA |
279 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
280 | ||
281 | /* This assumes the DRM is in total control of AGP space. | |
282 | * It's not always the case as AGP can be in the control | |
283 | * of user space (i.e. i810 driver). So this loop will get | |
284 | * skipped and we double check that dev->agp->memory is | |
285 | * actually set as well as being invalid before EPERM'ing | |
286 | */ | |
bd1b331f | 287 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
288 | if ((map->offset >= entry->bound) && |
289 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
290 | valid = 1; | |
291 | break; | |
292 | } | |
1da177e4 | 293 | } |
bd1b331f | 294 | if (!list_empty(&dev->agp->memory) && !valid) { |
9a298b2a | 295 | kfree(map); |
54ba2f76 DA |
296 | return -EPERM; |
297 | } | |
41c2e75e BH |
298 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
299 | (unsigned long long)map->offset, map->size); | |
54ba2f76 | 300 | |
a2c0a97b | 301 | break; |
812c369d | 302 | } |
a2c0a97b | 303 | case _DRM_GEM: |
812c369d | 304 | DRM_ERROR("tried to addmap GEM object\n"); |
1da177e4 LT |
305 | break; |
306 | case _DRM_SCATTER_GATHER: | |
307 | if (!dev->sg) { | |
9a298b2a | 308 | kfree(map); |
1da177e4 LT |
309 | return -EINVAL; |
310 | } | |
d1f2b55a | 311 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 312 | break; |
b5e89ed5 | 313 | case _DRM_CONSISTENT: |
2d0f9eaf | 314 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 315 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
316 | * casting it down to 32 bits is no problem, but we |
317 | * need to point to a 64bit variable first. */ | |
e6be8d9d | 318 | dmah = drm_pci_alloc(dev, map->size, map->size); |
9c8da5eb | 319 | if (!dmah) { |
9a298b2a | 320 | kfree(map); |
2d0f9eaf DA |
321 | return -ENOMEM; |
322 | } | |
9c8da5eb DA |
323 | map->handle = dmah->vaddr; |
324 | map->offset = (unsigned long)dmah->busaddr; | |
325 | kfree(dmah); | |
2d0f9eaf | 326 | break; |
1da177e4 | 327 | default: |
9a298b2a | 328 | kfree(map); |
1da177e4 LT |
329 | return -EINVAL; |
330 | } | |
331 | ||
94e3370e | 332 | list = kzalloc(sizeof(*list), GFP_KERNEL); |
b5e89ed5 | 333 | if (!list) { |
85abb3f9 | 334 | if (map->type == _DRM_REGISTERS) |
004a7727 | 335 | iounmap(map->handle); |
9a298b2a | 336 | kfree(map); |
1da177e4 LT |
337 | return -EINVAL; |
338 | } | |
1da177e4 LT |
339 | list->map = map; |
340 | ||
30e2fb18 | 341 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 342 | list_add(&list->head, &dev->maplist); |
8d153f71 | 343 | |
d1f2b55a | 344 | /* Assign a 32-bit handle */ |
30e2fb18 | 345 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
346 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
347 | map->offset; | |
f1a2a9b6 DM |
348 | ret = drm_map_handle(dev, &list->hash, user_token, 0, |
349 | (map->type == _DRM_SHM)); | |
8d153f71 | 350 | if (ret) { |
85abb3f9 | 351 | if (map->type == _DRM_REGISTERS) |
004a7727 | 352 | iounmap(map->handle); |
9a298b2a EA |
353 | kfree(map); |
354 | kfree(list); | |
8d153f71 TH |
355 | mutex_unlock(&dev->struct_mutex); |
356 | return ret; | |
357 | } | |
358 | ||
1545085a | 359 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 360 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 361 | |
2ff2e8a3 BS |
362 | if (!(map->flags & _DRM_DRIVER)) |
363 | list->master = dev->primary->master; | |
89625eb1 | 364 | *maplist = list; |
7ab98401 | 365 | return 0; |
54ba2f76 | 366 | } |
89625eb1 | 367 | |
41c2e75e | 368 | int drm_addmap(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 369 | unsigned int size, enum drm_map_type type, |
f77d390c | 370 | enum drm_map_flags flags, struct drm_local_map ** map_ptr) |
89625eb1 | 371 | { |
55910517 | 372 | struct drm_map_list *list; |
89625eb1 DA |
373 | int rc; |
374 | ||
375 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
376 | if (!rc) | |
377 | *map_ptr = list->map; | |
378 | return rc; | |
379 | } | |
b5e89ed5 | 380 | |
7ab98401 DA |
381 | EXPORT_SYMBOL(drm_addmap); |
382 | ||
f77d390c BH |
383 | /** |
384 | * Ioctl to specify a range of memory that is available for mapping by a | |
385 | * non-root process. | |
386 | * | |
387 | * \param inode device inode. | |
388 | * \param file_priv DRM file private. | |
389 | * \param cmd command. | |
390 | * \param arg pointer to a drm_map structure. | |
391 | * \return zero on success or a negative value on error. | |
392 | * | |
393 | */ | |
c153f45f EA |
394 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
395 | struct drm_file *file_priv) | |
7ab98401 | 396 | { |
c153f45f | 397 | struct drm_map *map = data; |
55910517 | 398 | struct drm_map_list *maplist; |
7ab98401 DA |
399 | int err; |
400 | ||
7c1c2871 | 401 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
402 | return -EPERM; |
403 | ||
c153f45f EA |
404 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
405 | map->flags, &maplist); | |
7ab98401 | 406 | |
b5e89ed5 | 407 | if (err) |
7ab98401 | 408 | return err; |
d1f2b55a | 409 | |
67e1a014 | 410 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 411 | map->handle = (void *)(unsigned long)maplist->user_token; |
1da177e4 | 412 | return 0; |
88f399cd | 413 | } |
1da177e4 | 414 | |
1da177e4 LT |
415 | /** |
416 | * Remove a map private from list and deallocate resources if the mapping | |
417 | * isn't in use. | |
418 | * | |
1da177e4 LT |
419 | * Searches the map on drm_device::maplist, removes it from the list, see if |
420 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
421 | * being on use. | |
422 | * | |
7ab98401 | 423 | * \sa drm_addmap |
1da177e4 | 424 | */ |
f77d390c | 425 | int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 426 | { |
55910517 | 427 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 428 | drm_dma_handle_t dmah; |
bd1b331f | 429 | int found = 0; |
7c1c2871 | 430 | struct drm_master *master; |
1da177e4 | 431 | |
836cf046 | 432 | /* Find the list entry for the map and remove it */ |
bd1b331f | 433 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 434 | if (r_list->map == map) { |
7c1c2871 | 435 | master = r_list->master; |
bd1b331f | 436 | list_del(&r_list->head); |
1545085a TH |
437 | drm_ht_remove_key(&dev->map_hash, |
438 | r_list->user_token >> PAGE_SHIFT); | |
9a298b2a | 439 | kfree(r_list); |
bd1b331f | 440 | found = 1; |
836cf046 DA |
441 | break; |
442 | } | |
1da177e4 LT |
443 | } |
444 | ||
bd1b331f | 445 | if (!found) |
1da177e4 | 446 | return -EINVAL; |
1da177e4 | 447 | |
836cf046 DA |
448 | switch (map->type) { |
449 | case _DRM_REGISTERS: | |
004a7727 | 450 | iounmap(map->handle); |
836cf046 DA |
451 | /* FALLTHROUGH */ |
452 | case _DRM_FRAME_BUFFER: | |
453 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
454 | int retcode; | |
b5e89ed5 DA |
455 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
456 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 457 | } |
836cf046 DA |
458 | break; |
459 | case _DRM_SHM: | |
460 | vfree(map->handle); | |
7c1c2871 DA |
461 | if (master) { |
462 | if (dev->sigdata.lock == master->lock.hw_lock) | |
463 | dev->sigdata.lock = NULL; | |
464 | master->lock.hw_lock = NULL; /* SHM removed */ | |
465 | master->lock.file_priv = NULL; | |
171901d1 | 466 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 467 | } |
836cf046 DA |
468 | break; |
469 | case _DRM_AGP: | |
470 | case _DRM_SCATTER_GATHER: | |
471 | break; | |
472 | case _DRM_CONSISTENT: | |
473 | dmah.vaddr = map->handle; | |
474 | dmah.busaddr = map->offset; | |
475 | dmah.size = map->size; | |
476 | __drm_pci_free(dev, &dmah); | |
477 | break; | |
a2c0a97b JB |
478 | case _DRM_GEM: |
479 | DRM_ERROR("tried to rmmap GEM object\n"); | |
480 | break; | |
1da177e4 | 481 | } |
9a298b2a | 482 | kfree(map); |
836cf046 | 483 | |
1da177e4 LT |
484 | return 0; |
485 | } | |
4e74f36d | 486 | EXPORT_SYMBOL(drm_rmmap_locked); |
836cf046 | 487 | |
f77d390c | 488 | int drm_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 DA |
489 | { |
490 | int ret; | |
491 | ||
30e2fb18 | 492 | mutex_lock(&dev->struct_mutex); |
836cf046 | 493 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 494 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
495 | |
496 | return ret; | |
497 | } | |
ba8bbcf6 | 498 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 499 | |
836cf046 DA |
500 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
501 | * the last close of the device, and this is necessary for cleanup when things | |
502 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
503 | * like a pointless exercise since they're going away anyway. | |
504 | * | |
505 | * One use case might be after addmap is allowed for normal users for SHM and | |
506 | * gets used by drivers that the server doesn't need to care about. This seems | |
507 | * unlikely. | |
f77d390c BH |
508 | * |
509 | * \param inode device inode. | |
510 | * \param file_priv DRM file private. | |
511 | * \param cmd command. | |
512 | * \param arg pointer to a struct drm_map structure. | |
513 | * \return zero on success or a negative value on error. | |
836cf046 | 514 | */ |
c153f45f EA |
515 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
516 | struct drm_file *file_priv) | |
7ab98401 | 517 | { |
c153f45f | 518 | struct drm_map *request = data; |
f77d390c | 519 | struct drm_local_map *map = NULL; |
55910517 | 520 | struct drm_map_list *r_list; |
836cf046 | 521 | int ret; |
7ab98401 | 522 | |
30e2fb18 | 523 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 524 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 525 | if (r_list->map && |
c153f45f | 526 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
527 | r_list->map->flags & _DRM_REMOVABLE) { |
528 | map = r_list->map; | |
529 | break; | |
530 | } | |
531 | } | |
532 | ||
533 | /* List has wrapped around to the head pointer, or its empty we didn't | |
534 | * find anything. | |
535 | */ | |
bd1b331f | 536 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 537 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
538 | return -EINVAL; |
539 | } | |
540 | ||
836cf046 DA |
541 | /* Register and framebuffer maps are permanent */ |
542 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 543 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
544 | return 0; |
545 | } | |
546 | ||
547 | ret = drm_rmmap_locked(dev, map); | |
548 | ||
30e2fb18 | 549 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
550 | |
551 | return ret; | |
7ab98401 | 552 | } |
1da177e4 LT |
553 | |
554 | /** | |
555 | * Cleanup after an error on one of the addbufs() functions. | |
556 | * | |
836cf046 | 557 | * \param dev DRM device. |
1da177e4 LT |
558 | * \param entry buffer entry where the error occurred. |
559 | * | |
560 | * Frees any pages and buffers associated with the given entry. | |
561 | */ | |
cdd55a29 DA |
562 | static void drm_cleanup_buf_error(struct drm_device * dev, |
563 | struct drm_buf_entry * entry) | |
1da177e4 LT |
564 | { |
565 | int i; | |
566 | ||
567 | if (entry->seg_count) { | |
568 | for (i = 0; i < entry->seg_count; i++) { | |
569 | if (entry->seglist[i]) { | |
ddf19b97 | 570 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
571 | } |
572 | } | |
9a298b2a | 573 | kfree(entry->seglist); |
1da177e4 LT |
574 | |
575 | entry->seg_count = 0; | |
576 | } | |
577 | ||
b5e89ed5 DA |
578 | if (entry->buf_count) { |
579 | for (i = 0; i < entry->buf_count; i++) { | |
9a298b2a | 580 | kfree(entry->buflist[i].dev_private); |
1da177e4 | 581 | } |
9a298b2a | 582 | kfree(entry->buflist); |
1da177e4 LT |
583 | |
584 | entry->buf_count = 0; | |
585 | } | |
586 | } | |
587 | ||
588 | #if __OS_HAS_AGP | |
589 | /** | |
d59431bf | 590 | * Add AGP buffers for DMA transfers. |
1da177e4 | 591 | * |
84b1fd10 | 592 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 593 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 594 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 595 | * |
1da177e4 LT |
596 | * After some sanity checks creates a drm_buf structure for each buffer and |
597 | * reallocates the buffer list of the same size order to accommodate the new | |
598 | * buffers. | |
599 | */ | |
84b1fd10 | 600 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 601 | { |
cdd55a29 DA |
602 | struct drm_device_dma *dma = dev->dma; |
603 | struct drm_buf_entry *entry; | |
55910517 | 604 | struct drm_agp_mem *agp_entry; |
056219e2 | 605 | struct drm_buf *buf; |
1da177e4 LT |
606 | unsigned long offset; |
607 | unsigned long agp_offset; | |
608 | int count; | |
609 | int order; | |
610 | int size; | |
611 | int alignment; | |
612 | int page_order; | |
613 | int total; | |
614 | int byte_count; | |
54ba2f76 | 615 | int i, valid; |
056219e2 | 616 | struct drm_buf **temp_buflist; |
1da177e4 | 617 | |
b5e89ed5 DA |
618 | if (!dma) |
619 | return -EINVAL; | |
1da177e4 | 620 | |
d59431bf DA |
621 | count = request->count; |
622 | order = drm_order(request->size); | |
1da177e4 LT |
623 | size = 1 << order; |
624 | ||
b5e89ed5 DA |
625 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
626 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
627 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
628 | total = PAGE_SIZE << page_order; | |
629 | ||
630 | byte_count = 0; | |
d59431bf | 631 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 632 | |
b5e89ed5 DA |
633 | DRM_DEBUG("count: %d\n", count); |
634 | DRM_DEBUG("order: %d\n", order); | |
635 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 636 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
637 | DRM_DEBUG("alignment: %d\n", alignment); |
638 | DRM_DEBUG("page_order: %d\n", page_order); | |
639 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 640 | |
b5e89ed5 DA |
641 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
642 | return -EINVAL; | |
643 | if (dev->queue_count) | |
644 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 645 | |
54ba2f76 DA |
646 | /* Make sure buffers are located in AGP memory that we own */ |
647 | valid = 0; | |
bd1b331f | 648 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
649 | if ((agp_offset >= agp_entry->bound) && |
650 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
651 | valid = 1; | |
652 | break; | |
653 | } | |
654 | } | |
bd1b331f | 655 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
656 | DRM_DEBUG("zone invalid\n"); |
657 | return -EINVAL; | |
658 | } | |
b5e89ed5 DA |
659 | spin_lock(&dev->count_lock); |
660 | if (dev->buf_use) { | |
661 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
662 | return -EBUSY; |
663 | } | |
b5e89ed5 DA |
664 | atomic_inc(&dev->buf_alloc); |
665 | spin_unlock(&dev->count_lock); | |
1da177e4 | 666 | |
30e2fb18 | 667 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 668 | entry = &dma->bufs[order]; |
b5e89ed5 | 669 | if (entry->buf_count) { |
30e2fb18 | 670 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
671 | atomic_dec(&dev->buf_alloc); |
672 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
673 | } |
674 | ||
675 | if (count < 0 || count > 4096) { | |
30e2fb18 | 676 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 677 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
678 | return -EINVAL; |
679 | } | |
680 | ||
94e3370e | 681 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 682 | if (!entry->buflist) { |
30e2fb18 | 683 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 684 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
685 | return -ENOMEM; |
686 | } | |
1da177e4 LT |
687 | |
688 | entry->buf_size = size; | |
689 | entry->page_order = page_order; | |
690 | ||
691 | offset = 0; | |
692 | ||
b5e89ed5 DA |
693 | while (entry->buf_count < count) { |
694 | buf = &entry->buflist[entry->buf_count]; | |
695 | buf->idx = dma->buf_count + entry->buf_count; | |
696 | buf->total = alignment; | |
697 | buf->order = order; | |
698 | buf->used = 0; | |
1da177e4 | 699 | |
b5e89ed5 | 700 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
701 | buf->bus_address = agp_offset + offset; |
702 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 703 | buf->next = NULL; |
1da177e4 LT |
704 | buf->waiting = 0; |
705 | buf->pending = 0; | |
b5e89ed5 | 706 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 707 | buf->file_priv = NULL; |
1da177e4 LT |
708 | |
709 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 710 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 711 | if (!buf->dev_private) { |
1da177e4 LT |
712 | /* Set count correctly so we free the proper amount. */ |
713 | entry->buf_count = count; | |
b5e89ed5 | 714 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 715 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 716 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
717 | return -ENOMEM; |
718 | } | |
1da177e4 | 719 | |
b5e89ed5 | 720 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
721 | |
722 | offset += alignment; | |
723 | entry->buf_count++; | |
724 | byte_count += PAGE_SIZE << page_order; | |
725 | } | |
726 | ||
b5e89ed5 | 727 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 728 | |
9a298b2a EA |
729 | temp_buflist = krealloc(dma->buflist, |
730 | (dma->buf_count + entry->buf_count) * | |
731 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 732 | if (!temp_buflist) { |
1da177e4 | 733 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 734 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 735 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 736 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
737 | return -ENOMEM; |
738 | } | |
739 | dma->buflist = temp_buflist; | |
740 | ||
b5e89ed5 | 741 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
742 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
743 | } | |
744 | ||
745 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
746 | dma->seg_count += entry->seg_count; |
747 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
748 | dma->byte_count += byte_count; |
749 | ||
b5e89ed5 DA |
750 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
751 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 752 | |
30e2fb18 | 753 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 754 | |
d59431bf DA |
755 | request->count = entry->buf_count; |
756 | request->size = size; | |
1da177e4 LT |
757 | |
758 | dma->flags = _DRM_DMA_USE_AGP; | |
759 | ||
b5e89ed5 | 760 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
761 | return 0; |
762 | } | |
d84f76d3 | 763 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 764 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 765 | |
84b1fd10 | 766 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 767 | { |
cdd55a29 | 768 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
769 | int count; |
770 | int order; | |
771 | int size; | |
772 | int total; | |
773 | int page_order; | |
cdd55a29 | 774 | struct drm_buf_entry *entry; |
ddf19b97 | 775 | drm_dma_handle_t *dmah; |
056219e2 | 776 | struct drm_buf *buf; |
1da177e4 LT |
777 | int alignment; |
778 | unsigned long offset; | |
779 | int i; | |
780 | int byte_count; | |
781 | int page_count; | |
782 | unsigned long *temp_pagelist; | |
056219e2 | 783 | struct drm_buf **temp_buflist; |
1da177e4 | 784 | |
b5e89ed5 DA |
785 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
786 | return -EINVAL; | |
d985c108 | 787 | |
b5e89ed5 DA |
788 | if (!dma) |
789 | return -EINVAL; | |
1da177e4 | 790 | |
d985c108 DA |
791 | if (!capable(CAP_SYS_ADMIN)) |
792 | return -EPERM; | |
793 | ||
d59431bf DA |
794 | count = request->count; |
795 | order = drm_order(request->size); | |
1da177e4 LT |
796 | size = 1 << order; |
797 | ||
b5e89ed5 DA |
798 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
799 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 800 | |
b5e89ed5 DA |
801 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
802 | return -EINVAL; | |
803 | if (dev->queue_count) | |
804 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 805 | |
d59431bf | 806 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 807 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
808 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
809 | total = PAGE_SIZE << page_order; | |
810 | ||
b5e89ed5 DA |
811 | spin_lock(&dev->count_lock); |
812 | if (dev->buf_use) { | |
813 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
814 | return -EBUSY; |
815 | } | |
b5e89ed5 DA |
816 | atomic_inc(&dev->buf_alloc); |
817 | spin_unlock(&dev->count_lock); | |
1da177e4 | 818 | |
30e2fb18 | 819 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 820 | entry = &dma->bufs[order]; |
b5e89ed5 | 821 | if (entry->buf_count) { |
30e2fb18 | 822 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 823 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
824 | return -ENOMEM; /* May only call once for each order */ |
825 | } | |
826 | ||
827 | if (count < 0 || count > 4096) { | |
30e2fb18 | 828 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 829 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
830 | return -EINVAL; |
831 | } | |
832 | ||
94e3370e | 833 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 834 | if (!entry->buflist) { |
30e2fb18 | 835 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 836 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
837 | return -ENOMEM; |
838 | } | |
b5e89ed5 | 839 | |
94e3370e | 840 | entry->seglist = kzalloc(count * sizeof(*entry->seglist), GFP_KERNEL); |
b5e89ed5 | 841 | if (!entry->seglist) { |
9a298b2a | 842 | kfree(entry->buflist); |
30e2fb18 | 843 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 844 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
845 | return -ENOMEM; |
846 | } | |
1da177e4 LT |
847 | |
848 | /* Keep the original pagelist until we know all the allocations | |
849 | * have succeeded | |
850 | */ | |
9a298b2a EA |
851 | temp_pagelist = kmalloc((dma->page_count + (count << page_order)) * |
852 | sizeof(*dma->pagelist), GFP_KERNEL); | |
1da177e4 | 853 | if (!temp_pagelist) { |
9a298b2a EA |
854 | kfree(entry->buflist); |
855 | kfree(entry->seglist); | |
30e2fb18 | 856 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 857 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
858 | return -ENOMEM; |
859 | } | |
860 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
861 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
862 | DRM_DEBUG("pagelist: %d entries\n", | |
863 | dma->page_count + (count << page_order)); | |
1da177e4 | 864 | |
b5e89ed5 | 865 | entry->buf_size = size; |
1da177e4 LT |
866 | entry->page_order = page_order; |
867 | byte_count = 0; | |
868 | page_count = 0; | |
869 | ||
b5e89ed5 | 870 | while (entry->buf_count < count) { |
bc5f4523 | 871 | |
e6be8d9d | 872 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000); |
bc5f4523 | 873 | |
ddf19b97 | 874 | if (!dmah) { |
1da177e4 LT |
875 | /* Set count correctly so we free the proper amount. */ |
876 | entry->buf_count = count; | |
877 | entry->seg_count = count; | |
878 | drm_cleanup_buf_error(dev, entry); | |
9a298b2a | 879 | kfree(temp_pagelist); |
30e2fb18 | 880 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 881 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
882 | return -ENOMEM; |
883 | } | |
ddf19b97 | 884 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
885 | for (i = 0; i < (1 << page_order); i++) { |
886 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
887 | dma->page_count + page_count, | |
ddf19b97 | 888 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 889 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 890 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 891 | } |
b5e89ed5 DA |
892 | for (offset = 0; |
893 | offset + size <= total && entry->buf_count < count; | |
894 | offset += alignment, ++entry->buf_count) { | |
895 | buf = &entry->buflist[entry->buf_count]; | |
896 | buf->idx = dma->buf_count + entry->buf_count; | |
897 | buf->total = alignment; | |
898 | buf->order = order; | |
899 | buf->used = 0; | |
900 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
901 | buf->address = (void *)(dmah->vaddr + offset); |
902 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 903 | buf->next = NULL; |
1da177e4 LT |
904 | buf->waiting = 0; |
905 | buf->pending = 0; | |
b5e89ed5 | 906 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 907 | buf->file_priv = NULL; |
1da177e4 LT |
908 | |
909 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e DB |
910 | buf->dev_private = kzalloc(buf->dev_priv_size, |
911 | GFP_KERNEL); | |
b5e89ed5 | 912 | if (!buf->dev_private) { |
1da177e4 LT |
913 | /* Set count correctly so we free the proper amount. */ |
914 | entry->buf_count = count; | |
915 | entry->seg_count = count; | |
b5e89ed5 | 916 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 917 | kfree(temp_pagelist); |
30e2fb18 | 918 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 919 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
920 | return -ENOMEM; |
921 | } | |
1da177e4 | 922 | |
b5e89ed5 DA |
923 | DRM_DEBUG("buffer %d @ %p\n", |
924 | entry->buf_count, buf->address); | |
1da177e4 LT |
925 | } |
926 | byte_count += PAGE_SIZE << page_order; | |
927 | } | |
928 | ||
9a298b2a EA |
929 | temp_buflist = krealloc(dma->buflist, |
930 | (dma->buf_count + entry->buf_count) * | |
931 | sizeof(*dma->buflist), GFP_KERNEL); | |
1da177e4 LT |
932 | if (!temp_buflist) { |
933 | /* Free the entry because it isn't valid */ | |
b5e89ed5 | 934 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 935 | kfree(temp_pagelist); |
30e2fb18 | 936 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 937 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
938 | return -ENOMEM; |
939 | } | |
940 | dma->buflist = temp_buflist; | |
941 | ||
b5e89ed5 | 942 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
943 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
944 | } | |
945 | ||
88393161 | 946 | /* No allocations failed, so now we can replace the original pagelist |
1da177e4 LT |
947 | * with the new one. |
948 | */ | |
949 | if (dma->page_count) { | |
9a298b2a | 950 | kfree(dma->pagelist); |
1da177e4 LT |
951 | } |
952 | dma->pagelist = temp_pagelist; | |
953 | ||
954 | dma->buf_count += entry->buf_count; | |
955 | dma->seg_count += entry->seg_count; | |
956 | dma->page_count += entry->seg_count << page_order; | |
957 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
958 | ||
30e2fb18 | 959 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 960 | |
d59431bf DA |
961 | request->count = entry->buf_count; |
962 | request->size = size; | |
1da177e4 | 963 | |
3417f33e GS |
964 | if (request->flags & _DRM_PCI_BUFFER_RO) |
965 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
966 | ||
b5e89ed5 | 967 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
968 | return 0; |
969 | ||
970 | } | |
d84f76d3 | 971 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 972 | |
84b1fd10 | 973 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 974 | { |
cdd55a29 DA |
975 | struct drm_device_dma *dma = dev->dma; |
976 | struct drm_buf_entry *entry; | |
056219e2 | 977 | struct drm_buf *buf; |
1da177e4 LT |
978 | unsigned long offset; |
979 | unsigned long agp_offset; | |
980 | int count; | |
981 | int order; | |
982 | int size; | |
983 | int alignment; | |
984 | int page_order; | |
985 | int total; | |
986 | int byte_count; | |
987 | int i; | |
056219e2 | 988 | struct drm_buf **temp_buflist; |
1da177e4 | 989 | |
b5e89ed5 DA |
990 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
991 | return -EINVAL; | |
992 | ||
993 | if (!dma) | |
994 | return -EINVAL; | |
1da177e4 | 995 | |
d985c108 DA |
996 | if (!capable(CAP_SYS_ADMIN)) |
997 | return -EPERM; | |
998 | ||
d59431bf DA |
999 | count = request->count; |
1000 | order = drm_order(request->size); | |
1da177e4 LT |
1001 | size = 1 << order; |
1002 | ||
b5e89ed5 DA |
1003 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
1004 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
1005 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
1006 | total = PAGE_SIZE << page_order; | |
1007 | ||
1008 | byte_count = 0; | |
d59431bf | 1009 | agp_offset = request->agp_start; |
1da177e4 | 1010 | |
b5e89ed5 DA |
1011 | DRM_DEBUG("count: %d\n", count); |
1012 | DRM_DEBUG("order: %d\n", order); | |
1013 | DRM_DEBUG("size: %d\n", size); | |
1014 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1015 | DRM_DEBUG("alignment: %d\n", alignment); | |
1016 | DRM_DEBUG("page_order: %d\n", page_order); | |
1017 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1018 | |
b5e89ed5 DA |
1019 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1020 | return -EINVAL; | |
1021 | if (dev->queue_count) | |
1022 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1023 | |
b5e89ed5 DA |
1024 | spin_lock(&dev->count_lock); |
1025 | if (dev->buf_use) { | |
1026 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1027 | return -EBUSY; |
1028 | } | |
b5e89ed5 DA |
1029 | atomic_inc(&dev->buf_alloc); |
1030 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1031 | |
30e2fb18 | 1032 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1033 | entry = &dma->bufs[order]; |
b5e89ed5 | 1034 | if (entry->buf_count) { |
30e2fb18 | 1035 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1036 | atomic_dec(&dev->buf_alloc); |
1037 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1038 | } |
1039 | ||
1040 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1041 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1042 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1043 | return -EINVAL; |
1044 | } | |
1045 | ||
94e3370e | 1046 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1047 | GFP_KERNEL); |
b5e89ed5 | 1048 | if (!entry->buflist) { |
30e2fb18 | 1049 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1050 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1051 | return -ENOMEM; |
1052 | } | |
1da177e4 LT |
1053 | |
1054 | entry->buf_size = size; | |
1055 | entry->page_order = page_order; | |
1056 | ||
1057 | offset = 0; | |
1058 | ||
b5e89ed5 DA |
1059 | while (entry->buf_count < count) { |
1060 | buf = &entry->buflist[entry->buf_count]; | |
1061 | buf->idx = dma->buf_count + entry->buf_count; | |
1062 | buf->total = alignment; | |
1063 | buf->order = order; | |
1064 | buf->used = 0; | |
1da177e4 | 1065 | |
b5e89ed5 | 1066 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1067 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1068 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1069 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1070 | buf->next = NULL; |
1da177e4 LT |
1071 | buf->waiting = 0; |
1072 | buf->pending = 0; | |
b5e89ed5 | 1073 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 1074 | buf->file_priv = NULL; |
1da177e4 LT |
1075 | |
1076 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1077 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 1078 | if (!buf->dev_private) { |
1da177e4 LT |
1079 | /* Set count correctly so we free the proper amount. */ |
1080 | entry->buf_count = count; | |
b5e89ed5 | 1081 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1082 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1083 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1084 | return -ENOMEM; |
1085 | } | |
1086 | ||
b5e89ed5 | 1087 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1088 | |
1089 | offset += alignment; | |
1090 | entry->buf_count++; | |
1091 | byte_count += PAGE_SIZE << page_order; | |
1092 | } | |
1093 | ||
b5e89ed5 | 1094 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1095 | |
9a298b2a EA |
1096 | temp_buflist = krealloc(dma->buflist, |
1097 | (dma->buf_count + entry->buf_count) * | |
1098 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 1099 | if (!temp_buflist) { |
1da177e4 | 1100 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1101 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1102 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1103 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1104 | return -ENOMEM; |
1105 | } | |
1106 | dma->buflist = temp_buflist; | |
1107 | ||
b5e89ed5 | 1108 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1109 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1110 | } | |
1111 | ||
1112 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1113 | dma->seg_count += entry->seg_count; |
1114 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1115 | dma->byte_count += byte_count; |
1116 | ||
b5e89ed5 DA |
1117 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1118 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1119 | |
30e2fb18 | 1120 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1121 | |
d59431bf DA |
1122 | request->count = entry->buf_count; |
1123 | request->size = size; | |
1da177e4 LT |
1124 | |
1125 | dma->flags = _DRM_DMA_USE_SG; | |
1126 | ||
b5e89ed5 | 1127 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1128 | return 0; |
1129 | } | |
1130 | ||
84b1fd10 | 1131 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1132 | { |
cdd55a29 DA |
1133 | struct drm_device_dma *dma = dev->dma; |
1134 | struct drm_buf_entry *entry; | |
056219e2 | 1135 | struct drm_buf *buf; |
b84397d6 DA |
1136 | unsigned long offset; |
1137 | unsigned long agp_offset; | |
1138 | int count; | |
1139 | int order; | |
1140 | int size; | |
1141 | int alignment; | |
1142 | int page_order; | |
1143 | int total; | |
1144 | int byte_count; | |
1145 | int i; | |
056219e2 | 1146 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1147 | |
1148 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1149 | return -EINVAL; | |
b5e89ed5 | 1150 | |
b84397d6 DA |
1151 | if (!dma) |
1152 | return -EINVAL; | |
1153 | ||
d985c108 DA |
1154 | if (!capable(CAP_SYS_ADMIN)) |
1155 | return -EPERM; | |
1156 | ||
d59431bf DA |
1157 | count = request->count; |
1158 | order = drm_order(request->size); | |
b84397d6 DA |
1159 | size = 1 << order; |
1160 | ||
d59431bf | 1161 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1162 | ? PAGE_ALIGN(size) : size; |
1163 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1164 | total = PAGE_SIZE << page_order; | |
1165 | ||
1166 | byte_count = 0; | |
d59431bf | 1167 | agp_offset = request->agp_start; |
b84397d6 DA |
1168 | |
1169 | DRM_DEBUG("count: %d\n", count); | |
1170 | DRM_DEBUG("order: %d\n", order); | |
1171 | DRM_DEBUG("size: %d\n", size); | |
1172 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1173 | DRM_DEBUG("alignment: %d\n", alignment); | |
1174 | DRM_DEBUG("page_order: %d\n", page_order); | |
1175 | DRM_DEBUG("total: %d\n", total); | |
1176 | ||
1177 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1178 | return -EINVAL; | |
1179 | if (dev->queue_count) | |
1180 | return -EBUSY; /* Not while in use */ | |
1181 | ||
1182 | spin_lock(&dev->count_lock); | |
1183 | if (dev->buf_use) { | |
1184 | spin_unlock(&dev->count_lock); | |
1185 | return -EBUSY; | |
1186 | } | |
1187 | atomic_inc(&dev->buf_alloc); | |
1188 | spin_unlock(&dev->count_lock); | |
1189 | ||
30e2fb18 | 1190 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1191 | entry = &dma->bufs[order]; |
1192 | if (entry->buf_count) { | |
30e2fb18 | 1193 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1194 | atomic_dec(&dev->buf_alloc); |
1195 | return -ENOMEM; /* May only call once for each order */ | |
1196 | } | |
1197 | ||
1198 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1199 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1200 | atomic_dec(&dev->buf_alloc); |
1201 | return -EINVAL; | |
1202 | } | |
1203 | ||
94e3370e | 1204 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1205 | GFP_KERNEL); |
b84397d6 | 1206 | if (!entry->buflist) { |
30e2fb18 | 1207 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1208 | atomic_dec(&dev->buf_alloc); |
1209 | return -ENOMEM; | |
1210 | } | |
b84397d6 DA |
1211 | |
1212 | entry->buf_size = size; | |
1213 | entry->page_order = page_order; | |
1214 | ||
1215 | offset = 0; | |
1216 | ||
1217 | while (entry->buf_count < count) { | |
1218 | buf = &entry->buflist[entry->buf_count]; | |
1219 | buf->idx = dma->buf_count + entry->buf_count; | |
1220 | buf->total = alignment; | |
1221 | buf->order = order; | |
1222 | buf->used = 0; | |
1223 | ||
1224 | buf->offset = (dma->byte_count + offset); | |
1225 | buf->bus_address = agp_offset + offset; | |
1226 | buf->address = (void *)(agp_offset + offset); | |
1227 | buf->next = NULL; | |
1228 | buf->waiting = 0; | |
1229 | buf->pending = 0; | |
1230 | init_waitqueue_head(&buf->dma_wait); | |
6c340eac | 1231 | buf->file_priv = NULL; |
b84397d6 DA |
1232 | |
1233 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1234 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b84397d6 DA |
1235 | if (!buf->dev_private) { |
1236 | /* Set count correctly so we free the proper amount. */ | |
1237 | entry->buf_count = count; | |
1238 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1239 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1240 | atomic_dec(&dev->buf_alloc); |
1241 | return -ENOMEM; | |
1242 | } | |
b84397d6 DA |
1243 | |
1244 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1245 | ||
1246 | offset += alignment; | |
1247 | entry->buf_count++; | |
1248 | byte_count += PAGE_SIZE << page_order; | |
1249 | } | |
1250 | ||
1251 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1252 | ||
9a298b2a EA |
1253 | temp_buflist = krealloc(dma->buflist, |
1254 | (dma->buf_count + entry->buf_count) * | |
1255 | sizeof(*dma->buflist), GFP_KERNEL); | |
b84397d6 DA |
1256 | if (!temp_buflist) { |
1257 | /* Free the entry because it isn't valid */ | |
1258 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1259 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1260 | atomic_dec(&dev->buf_alloc); |
1261 | return -ENOMEM; | |
1262 | } | |
1263 | dma->buflist = temp_buflist; | |
1264 | ||
1265 | for (i = 0; i < entry->buf_count; i++) { | |
1266 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1267 | } | |
1268 | ||
1269 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1270 | dma->seg_count += entry->seg_count; |
1271 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1272 | dma->byte_count += byte_count; |
1273 | ||
1274 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1275 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1276 | ||
30e2fb18 | 1277 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1278 | |
d59431bf DA |
1279 | request->count = entry->buf_count; |
1280 | request->size = size; | |
b84397d6 DA |
1281 | |
1282 | dma->flags = _DRM_DMA_USE_FB; | |
1283 | ||
1284 | atomic_dec(&dev->buf_alloc); | |
1285 | return 0; | |
1286 | } | |
d985c108 | 1287 | |
b84397d6 | 1288 | |
1da177e4 LT |
1289 | /** |
1290 | * Add buffers for DMA transfers (ioctl). | |
1291 | * | |
1292 | * \param inode device inode. | |
6c340eac | 1293 | * \param file_priv DRM file private. |
1da177e4 | 1294 | * \param cmd command. |
c60ce623 | 1295 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1296 | * \return zero on success or a negative number on failure. |
1297 | * | |
1298 | * According with the memory type specified in drm_buf_desc::flags and the | |
1299 | * build options, it dispatches the call either to addbufs_agp(), | |
1300 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1301 | * PCI memory respectively. | |
1302 | */ | |
c153f45f EA |
1303 | int drm_addbufs(struct drm_device *dev, void *data, |
1304 | struct drm_file *file_priv) | |
1da177e4 | 1305 | { |
c153f45f | 1306 | struct drm_buf_desc *request = data; |
d59431bf | 1307 | int ret; |
b5e89ed5 | 1308 | |
1da177e4 LT |
1309 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1310 | return -EINVAL; | |
1311 | ||
1da177e4 | 1312 | #if __OS_HAS_AGP |
c153f45f EA |
1313 | if (request->flags & _DRM_AGP_BUFFER) |
1314 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1315 | else |
1316 | #endif | |
c153f45f EA |
1317 | if (request->flags & _DRM_SG_BUFFER) |
1318 | ret = drm_addbufs_sg(dev, request); | |
1319 | else if (request->flags & _DRM_FB_BUFFER) | |
1320 | ret = drm_addbufs_fb(dev, request); | |
1da177e4 | 1321 | else |
c153f45f | 1322 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1323 | |
d59431bf | 1324 | return ret; |
1da177e4 LT |
1325 | } |
1326 | ||
1da177e4 LT |
1327 | /** |
1328 | * Get information about the buffer mappings. | |
1329 | * | |
1330 | * This was originally mean for debugging purposes, or by a sophisticated | |
1331 | * client library to determine how best to use the available buffers (e.g., | |
1332 | * large buffers can be used for image transfer). | |
1333 | * | |
1334 | * \param inode device inode. | |
6c340eac | 1335 | * \param file_priv DRM file private. |
1da177e4 LT |
1336 | * \param cmd command. |
1337 | * \param arg pointer to a drm_buf_info structure. | |
1338 | * \return zero on success or a negative number on failure. | |
1339 | * | |
1340 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1341 | * lock, preventing of allocating more buffers after this call. Information | |
1342 | * about each requested buffer is then copied into user space. | |
1343 | */ | |
c153f45f EA |
1344 | int drm_infobufs(struct drm_device *dev, void *data, |
1345 | struct drm_file *file_priv) | |
1da177e4 | 1346 | { |
cdd55a29 | 1347 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1348 | struct drm_buf_info *request = data; |
1da177e4 LT |
1349 | int i; |
1350 | int count; | |
1351 | ||
1352 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1353 | return -EINVAL; | |
1354 | ||
b5e89ed5 DA |
1355 | if (!dma) |
1356 | return -EINVAL; | |
1da177e4 | 1357 | |
b5e89ed5 DA |
1358 | spin_lock(&dev->count_lock); |
1359 | if (atomic_read(&dev->buf_alloc)) { | |
1360 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1361 | return -EBUSY; |
1362 | } | |
1363 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1364 | spin_unlock(&dev->count_lock); |
1da177e4 | 1365 | |
b5e89ed5 DA |
1366 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1367 | if (dma->bufs[i].buf_count) | |
1368 | ++count; | |
1da177e4 LT |
1369 | } |
1370 | ||
b5e89ed5 | 1371 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1372 | |
c153f45f | 1373 | if (request->count >= count) { |
b5e89ed5 DA |
1374 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1375 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1376 | struct drm_buf_desc __user *to = |
c153f45f | 1377 | &request->list[count]; |
cdd55a29 DA |
1378 | struct drm_buf_entry *from = &dma->bufs[i]; |
1379 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1380 | if (copy_to_user(&to->count, |
1381 | &from->buf_count, | |
1382 | sizeof(from->buf_count)) || | |
1383 | copy_to_user(&to->size, | |
1384 | &from->buf_size, | |
1385 | sizeof(from->buf_size)) || | |
1386 | copy_to_user(&to->low_mark, | |
1387 | &list->low_mark, | |
1388 | sizeof(list->low_mark)) || | |
1389 | copy_to_user(&to->high_mark, | |
1390 | &list->high_mark, | |
1391 | sizeof(list->high_mark))) | |
1da177e4 LT |
1392 | return -EFAULT; |
1393 | ||
b5e89ed5 DA |
1394 | DRM_DEBUG("%d %d %d %d %d\n", |
1395 | i, | |
1396 | dma->bufs[i].buf_count, | |
1397 | dma->bufs[i].buf_size, | |
1398 | dma->bufs[i].freelist.low_mark, | |
1399 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1400 | ++count; |
1401 | } | |
1402 | } | |
1403 | } | |
c153f45f | 1404 | request->count = count; |
1da177e4 LT |
1405 | |
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | /** | |
1410 | * Specifies a low and high water mark for buffer allocation | |
1411 | * | |
1412 | * \param inode device inode. | |
6c340eac | 1413 | * \param file_priv DRM file private. |
1da177e4 LT |
1414 | * \param cmd command. |
1415 | * \param arg a pointer to a drm_buf_desc structure. | |
1416 | * \return zero on success or a negative number on failure. | |
1417 | * | |
1418 | * Verifies that the size order is bounded between the admissible orders and | |
1419 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1420 | * | |
1421 | * \note This ioctl is deprecated and mostly never used. | |
1422 | */ | |
c153f45f EA |
1423 | int drm_markbufs(struct drm_device *dev, void *data, |
1424 | struct drm_file *file_priv) | |
1da177e4 | 1425 | { |
cdd55a29 | 1426 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1427 | struct drm_buf_desc *request = data; |
1da177e4 | 1428 | int order; |
cdd55a29 | 1429 | struct drm_buf_entry *entry; |
1da177e4 LT |
1430 | |
1431 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1432 | return -EINVAL; | |
1433 | ||
b5e89ed5 DA |
1434 | if (!dma) |
1435 | return -EINVAL; | |
1da177e4 | 1436 | |
b5e89ed5 | 1437 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f EA |
1438 | request->size, request->low_mark, request->high_mark); |
1439 | order = drm_order(request->size); | |
b5e89ed5 DA |
1440 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1441 | return -EINVAL; | |
1da177e4 LT |
1442 | entry = &dma->bufs[order]; |
1443 | ||
c153f45f | 1444 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1445 | return -EINVAL; |
c153f45f | 1446 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1447 | return -EINVAL; |
1448 | ||
c153f45f EA |
1449 | entry->freelist.low_mark = request->low_mark; |
1450 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1451 | |
1452 | return 0; | |
1453 | } | |
1454 | ||
1455 | /** | |
b5e89ed5 | 1456 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1457 | * |
1458 | * \param inode device inode. | |
6c340eac | 1459 | * \param file_priv DRM file private. |
1da177e4 LT |
1460 | * \param cmd command. |
1461 | * \param arg pointer to a drm_buf_free structure. | |
1462 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1463 | * |
1da177e4 LT |
1464 | * Calls free_buffer() for each used buffer. |
1465 | * This function is primarily used for debugging. | |
1466 | */ | |
c153f45f EA |
1467 | int drm_freebufs(struct drm_device *dev, void *data, |
1468 | struct drm_file *file_priv) | |
1da177e4 | 1469 | { |
cdd55a29 | 1470 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1471 | struct drm_buf_free *request = data; |
1da177e4 LT |
1472 | int i; |
1473 | int idx; | |
056219e2 | 1474 | struct drm_buf *buf; |
1da177e4 LT |
1475 | |
1476 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1477 | return -EINVAL; | |
1478 | ||
b5e89ed5 DA |
1479 | if (!dma) |
1480 | return -EINVAL; | |
1da177e4 | 1481 | |
c153f45f EA |
1482 | DRM_DEBUG("%d\n", request->count); |
1483 | for (i = 0; i < request->count; i++) { | |
1484 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1485 | return -EFAULT; |
b5e89ed5 DA |
1486 | if (idx < 0 || idx >= dma->buf_count) { |
1487 | DRM_ERROR("Index %d (of %d max)\n", | |
1488 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1489 | return -EINVAL; |
1490 | } | |
1491 | buf = dma->buflist[idx]; | |
6c340eac | 1492 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1493 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1494 | task_pid_nr(current)); |
1da177e4 LT |
1495 | return -EINVAL; |
1496 | } | |
b5e89ed5 | 1497 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1498 | } |
1499 | ||
1500 | return 0; | |
1501 | } | |
1502 | ||
1503 | /** | |
1504 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1505 | * | |
1506 | * \param inode device inode. | |
6c340eac | 1507 | * \param file_priv DRM file private. |
1da177e4 LT |
1508 | * \param cmd command. |
1509 | * \param arg pointer to a drm_buf_map structure. | |
1510 | * \return zero on success or a negative number on failure. | |
1511 | * | |
3417f33e GS |
1512 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1513 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1514 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1515 | * drm_mmap_dma(). | |
1da177e4 | 1516 | */ |
c153f45f EA |
1517 | int drm_mapbufs(struct drm_device *dev, void *data, |
1518 | struct drm_file *file_priv) | |
1da177e4 | 1519 | { |
cdd55a29 | 1520 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1521 | int retcode = 0; |
1522 | const int zero = 0; | |
1523 | unsigned long virtual; | |
1524 | unsigned long address; | |
c153f45f | 1525 | struct drm_buf_map *request = data; |
1da177e4 LT |
1526 | int i; |
1527 | ||
1528 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1529 | return -EINVAL; | |
1530 | ||
b5e89ed5 DA |
1531 | if (!dma) |
1532 | return -EINVAL; | |
1da177e4 | 1533 | |
b5e89ed5 DA |
1534 | spin_lock(&dev->count_lock); |
1535 | if (atomic_read(&dev->buf_alloc)) { | |
1536 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1537 | return -EBUSY; |
1538 | } | |
1539 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1540 | spin_unlock(&dev->count_lock); |
1da177e4 | 1541 | |
c153f45f | 1542 | if (request->count >= dma->buf_count) { |
b84397d6 | 1543 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1544 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1545 | && (dma->flags & _DRM_DMA_USE_SG)) |
1546 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1547 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
f77d390c | 1548 | struct drm_local_map *map = dev->agp_buffer_map; |
d1f2b55a | 1549 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1550 | |
b5e89ed5 | 1551 | if (!map) { |
1da177e4 LT |
1552 | retcode = -EINVAL; |
1553 | goto done; | |
1554 | } | |
b5e89ed5 | 1555 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1556 | virtual = do_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1557 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1558 | MAP_SHARED, |
1559 | token); | |
b5e89ed5 | 1560 | up_write(¤t->mm->mmap_sem); |
1da177e4 | 1561 | } else { |
b5e89ed5 | 1562 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1563 | virtual = do_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1564 | PROT_READ | PROT_WRITE, |
1565 | MAP_SHARED, 0); | |
1566 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1567 | } |
b5e89ed5 | 1568 | if (virtual > -1024UL) { |
1da177e4 LT |
1569 | /* Real error */ |
1570 | retcode = (signed long)virtual; | |
1571 | goto done; | |
1572 | } | |
c153f45f | 1573 | request->virtual = (void __user *)virtual; |
1da177e4 | 1574 | |
b5e89ed5 | 1575 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1576 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1577 | &dma->buflist[i]->idx, |
c153f45f | 1578 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1579 | retcode = -EFAULT; |
1580 | goto done; | |
1581 | } | |
c153f45f | 1582 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1583 | &dma->buflist[i]->total, |
c153f45f | 1584 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1585 | retcode = -EFAULT; |
1586 | goto done; | |
1587 | } | |
c153f45f | 1588 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1589 | &zero, sizeof(zero))) { |
1da177e4 LT |
1590 | retcode = -EFAULT; |
1591 | goto done; | |
1592 | } | |
b5e89ed5 | 1593 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1594 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1595 | &address, sizeof(address))) { |
1da177e4 LT |
1596 | retcode = -EFAULT; |
1597 | goto done; | |
1598 | } | |
1599 | } | |
1600 | } | |
b5e89ed5 | 1601 | done: |
c153f45f EA |
1602 | request->count = dma->buf_count; |
1603 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1604 | |
1605 | return retcode; | |
1606 | } | |
1607 | ||
836cf046 DA |
1608 | /** |
1609 | * Compute size order. Returns the exponent of the smaller power of two which | |
1610 | * is greater or equal to given number. | |
b5e89ed5 | 1611 | * |
836cf046 DA |
1612 | * \param size size. |
1613 | * \return order. | |
1614 | * | |
1615 | * \todo Can be made faster. | |
1616 | */ | |
b5e89ed5 | 1617 | int drm_order(unsigned long size) |
836cf046 DA |
1618 | { |
1619 | int order; | |
1620 | unsigned long tmp; | |
1621 | ||
b5e89ed5 | 1622 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1623 | |
1624 | if (size & (size - 1)) | |
1625 | ++order; | |
1626 | ||
1627 | return order; | |
1628 | } | |
1629 | EXPORT_SYMBOL(drm_order); |