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> | |
f1a2a9b6 DM |
37 | #include <linux/log2.h> |
38 | #include <asm/shmparam.h> | |
1da177e4 LT |
39 | #include "drmP.h" |
40 | ||
d883f7f1 | 41 | resource_size_t drm_get_resource_start(struct drm_device *dev, unsigned int resource) |
1da177e4 | 42 | { |
836cf046 DA |
43 | return pci_resource_start(dev->pdev, resource); |
44 | } | |
45 | EXPORT_SYMBOL(drm_get_resource_start); | |
1da177e4 | 46 | |
d883f7f1 | 47 | resource_size_t drm_get_resource_len(struct drm_device *dev, unsigned int resource) |
836cf046 DA |
48 | { |
49 | return pci_resource_len(dev->pdev, resource); | |
50 | } | |
b5e89ed5 | 51 | |
836cf046 | 52 | EXPORT_SYMBOL(drm_get_resource_len); |
1da177e4 | 53 | |
55910517 | 54 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
f77d390c | 55 | struct drm_local_map *map) |
836cf046 | 56 | { |
55910517 | 57 | struct drm_map_list *entry; |
bd1b331f | 58 | list_for_each_entry(entry, &dev->maplist, head) { |
41c2e75e BH |
59 | /* |
60 | * Because the kernel-userspace ABI is fixed at a 32-bit offset | |
61 | * while PCI resources may live above that, we ignore the map | |
62 | * offset for maps of type _DRM_FRAMEBUFFER or _DRM_REGISTERS. | |
63 | * It is assumed that each driver will have only one resource of | |
64 | * each type. | |
65 | */ | |
66 | if (!entry->map || | |
67 | map->type != entry->map->type || | |
68 | entry->master != dev->primary->master) | |
69 | continue; | |
70 | switch (map->type) { | |
71 | case _DRM_SHM: | |
72 | if (map->flags != _DRM_CONTAINS_LOCK) | |
73 | break; | |
74 | case _DRM_REGISTERS: | |
75 | case _DRM_FRAME_BUFFER: | |
89625eb1 | 76 | return entry; |
41c2e75e BH |
77 | default: /* Make gcc happy */ |
78 | ; | |
836cf046 | 79 | } |
41c2e75e BH |
80 | if (entry->map->offset == map->offset) |
81 | return entry; | |
836cf046 DA |
82 | } |
83 | ||
84 | return NULL; | |
1da177e4 | 85 | } |
1da177e4 | 86 | |
e0be428e | 87 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
f1a2a9b6 | 88 | unsigned long user_token, int hashed_handle, int shm) |
d1f2b55a | 89 | { |
f1a2a9b6 DM |
90 | int use_hashed_handle, shift; |
91 | unsigned long add; | |
92 | ||
c2604ce0 | 93 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
94 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
95 | #elif (BITS_PER_LONG == 32) | |
96 | use_hashed_handle = hashed_handle; | |
97 | #else | |
98 | #error Unsupported long size. Neither 64 nor 32 bits. | |
99 | #endif | |
d1f2b55a | 100 | |
e08870c8 TH |
101 | if (!use_hashed_handle) { |
102 | int ret; | |
1545085a | 103 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
104 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
105 | if (ret != -EINVAL) | |
106 | return ret; | |
d1f2b55a | 107 | } |
f1a2a9b6 DM |
108 | |
109 | shift = 0; | |
110 | add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT; | |
111 | if (shm && (SHMLBA > PAGE_SIZE)) { | |
112 | int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1; | |
113 | ||
114 | /* For shared memory, we have to preserve the SHMLBA | |
115 | * bits of the eventual vma->vm_pgoff value during | |
116 | * mmap(). Otherwise we run into cache aliasing problems | |
117 | * on some platforms. On these platforms, the pgoff of | |
118 | * a mmap() request is used to pick a suitable virtual | |
119 | * address for the mmap() region such that it will not | |
120 | * cause cache aliasing problems. | |
121 | * | |
122 | * Therefore, make sure the SHMLBA relevant bits of the | |
123 | * hash value we use are equal to those in the original | |
124 | * kernel virtual address. | |
125 | */ | |
126 | shift = bits; | |
127 | add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL)); | |
128 | } | |
129 | ||
e08870c8 TH |
130 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
131 | user_token, 32 - PAGE_SHIFT - 3, | |
f1a2a9b6 | 132 | shift, add); |
d1f2b55a | 133 | } |
9a186645 | 134 | |
1da177e4 | 135 | /** |
f77d390c BH |
136 | * Core function to create a range of memory available for mapping by a |
137 | * non-root process. | |
1da177e4 LT |
138 | * |
139 | * Adjusts the memory offset to its absolute value according to the mapping | |
140 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
141 | * applicable and if supported by the kernel. | |
142 | */ | |
41c2e75e | 143 | static int drm_addmap_core(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 144 | unsigned int size, enum drm_map_type type, |
55910517 DA |
145 | enum drm_map_flags flags, |
146 | struct drm_map_list ** maplist) | |
1da177e4 | 147 | { |
f77d390c | 148 | struct drm_local_map *map; |
55910517 | 149 | struct drm_map_list *list; |
9c8da5eb | 150 | drm_dma_handle_t *dmah; |
8d153f71 TH |
151 | unsigned long user_token; |
152 | int ret; | |
1da177e4 | 153 | |
9a298b2a | 154 | map = kmalloc(sizeof(*map), GFP_KERNEL); |
b5e89ed5 | 155 | if (!map) |
1da177e4 LT |
156 | return -ENOMEM; |
157 | ||
7ab98401 DA |
158 | map->offset = offset; |
159 | map->size = size; | |
160 | map->flags = flags; | |
161 | map->type = type; | |
1da177e4 LT |
162 | |
163 | /* Only allow shared memory to be removable since we only keep enough | |
164 | * book keeping information about shared memory to allow for removal | |
165 | * when processes fork. | |
166 | */ | |
b5e89ed5 | 167 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
9a298b2a | 168 | kfree(map); |
1da177e4 LT |
169 | return -EINVAL; |
170 | } | |
41c2e75e BH |
171 | DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n", |
172 | (unsigned long long)map->offset, map->size, map->type); | |
b6741377 BH |
173 | |
174 | /* page-align _DRM_SHM maps. They are allocated here so there is no security | |
175 | * hole created by that and it works around various broken drivers that use | |
176 | * a non-aligned quantity to map the SAREA. --BenH | |
177 | */ | |
178 | if (map->type == _DRM_SHM) | |
179 | map->size = PAGE_ALIGN(map->size); | |
180 | ||
41c2e75e | 181 | if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) { |
9a298b2a | 182 | kfree(map); |
1da177e4 LT |
183 | return -EINVAL; |
184 | } | |
b5e89ed5 | 185 | map->mtrr = -1; |
1da177e4 LT |
186 | map->handle = NULL; |
187 | ||
b5e89ed5 | 188 | switch (map->type) { |
1da177e4 LT |
189 | case _DRM_REGISTERS: |
190 | case _DRM_FRAME_BUFFER: | |
88f399cd | 191 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) |
8d2ea625 | 192 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 | 193 | map->offset < virt_to_phys(high_memory)) { |
9a298b2a | 194 | kfree(map); |
1da177e4 LT |
195 | return -EINVAL; |
196 | } | |
197 | #endif | |
198 | #ifdef __alpha__ | |
199 | map->offset += dev->hose->mem_space->start; | |
200 | #endif | |
836cf046 DA |
201 | /* Some drivers preinitialize some maps, without the X Server |
202 | * needing to be aware of it. Therefore, we just return success | |
203 | * when the server tries to create a duplicate map. | |
204 | */ | |
89625eb1 DA |
205 | list = drm_find_matching_map(dev, map); |
206 | if (list != NULL) { | |
207 | if (list->map->size != map->size) { | |
836cf046 | 208 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
209 | "mismatched sizes, (%ld vs %ld)\n", |
210 | map->type, map->size, | |
211 | list->map->size); | |
89625eb1 | 212 | list->map->size = map->size; |
836cf046 DA |
213 | } |
214 | ||
9a298b2a | 215 | kfree(map); |
89625eb1 | 216 | *maplist = list; |
836cf046 DA |
217 | return 0; |
218 | } | |
219 | ||
1da177e4 | 220 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
221 | if (map->type == _DRM_FRAME_BUFFER || |
222 | (map->flags & _DRM_WRITE_COMBINING)) { | |
223 | map->mtrr = mtrr_add(map->offset, map->size, | |
224 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
225 | } |
226 | } | |
0769d39c | 227 | if (map->type == _DRM_REGISTERS) { |
004a7727 | 228 | map->handle = ioremap(map->offset, map->size); |
0769d39c | 229 | if (!map->handle) { |
9a298b2a | 230 | kfree(map); |
0769d39c ST |
231 | return -ENOMEM; |
232 | } | |
233 | } | |
bc5f4523 | 234 | |
1da177e4 | 235 | break; |
1da177e4 | 236 | case _DRM_SHM: |
54ba2f76 DA |
237 | list = drm_find_matching_map(dev, map); |
238 | if (list != NULL) { | |
239 | if(list->map->size != map->size) { | |
240 | DRM_DEBUG("Matching maps of type %d with " | |
241 | "mismatched sizes, (%ld vs %ld)\n", | |
242 | map->type, map->size, list->map->size); | |
243 | list->map->size = map->size; | |
244 | } | |
245 | ||
9a298b2a | 246 | kfree(map); |
54ba2f76 DA |
247 | *maplist = list; |
248 | return 0; | |
249 | } | |
f239b7b0 | 250 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
251 | DRM_DEBUG("%lu %d %p\n", |
252 | map->size, drm_order(map->size), map->handle); | |
253 | if (!map->handle) { | |
9a298b2a | 254 | kfree(map); |
1da177e4 LT |
255 | return -ENOMEM; |
256 | } | |
257 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 258 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 259 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
7c1c2871 | 260 | if (dev->primary->master->lock.hw_lock != NULL) { |
b5e89ed5 | 261 | vfree(map->handle); |
9a298b2a | 262 | kfree(map); |
1da177e4 LT |
263 | return -EBUSY; |
264 | } | |
7c1c2871 | 265 | dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
266 | } |
267 | break; | |
54ba2f76 | 268 | case _DRM_AGP: { |
55910517 | 269 | struct drm_agp_mem *entry; |
54ba2f76 DA |
270 | int valid = 0; |
271 | ||
272 | if (!drm_core_has_AGP(dev)) { | |
9a298b2a | 273 | kfree(map); |
54ba2f76 DA |
274 | return -EINVAL; |
275 | } | |
1da177e4 | 276 | #ifdef __alpha__ |
54ba2f76 | 277 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 278 | #endif |
47a184a8 EA |
279 | /* In some cases (i810 driver), user space may have already |
280 | * added the AGP base itself, because dev->agp->base previously | |
281 | * only got set during AGP enable. So, only add the base | |
282 | * address if the map's offset isn't already within the | |
283 | * aperture. | |
54ba2f76 | 284 | */ |
47a184a8 EA |
285 | if (map->offset < dev->agp->base || |
286 | map->offset > dev->agp->base + | |
287 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
288 | map->offset += dev->agp->base; | |
289 | } | |
54ba2f76 DA |
290 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
291 | ||
292 | /* This assumes the DRM is in total control of AGP space. | |
293 | * It's not always the case as AGP can be in the control | |
294 | * of user space (i.e. i810 driver). So this loop will get | |
295 | * skipped and we double check that dev->agp->memory is | |
296 | * actually set as well as being invalid before EPERM'ing | |
297 | */ | |
bd1b331f | 298 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
299 | if ((map->offset >= entry->bound) && |
300 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
301 | valid = 1; | |
302 | break; | |
303 | } | |
1da177e4 | 304 | } |
bd1b331f | 305 | if (!list_empty(&dev->agp->memory) && !valid) { |
9a298b2a | 306 | kfree(map); |
54ba2f76 DA |
307 | return -EPERM; |
308 | } | |
41c2e75e BH |
309 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
310 | (unsigned long long)map->offset, map->size); | |
54ba2f76 | 311 | |
a2c0a97b JB |
312 | break; |
313 | case _DRM_GEM: | |
314 | DRM_ERROR("tried to rmmap GEM object\n"); | |
1da177e4 | 315 | break; |
54ba2f76 | 316 | } |
1da177e4 LT |
317 | case _DRM_SCATTER_GATHER: |
318 | if (!dev->sg) { | |
9a298b2a | 319 | kfree(map); |
1da177e4 LT |
320 | return -EINVAL; |
321 | } | |
d1f2b55a | 322 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 323 | break; |
b5e89ed5 | 324 | case _DRM_CONSISTENT: |
2d0f9eaf | 325 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 326 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
327 | * casting it down to 32 bits is no problem, but we |
328 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
329 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
330 | if (!dmah) { | |
9a298b2a | 331 | kfree(map); |
2d0f9eaf DA |
332 | return -ENOMEM; |
333 | } | |
9c8da5eb DA |
334 | map->handle = dmah->vaddr; |
335 | map->offset = (unsigned long)dmah->busaddr; | |
336 | kfree(dmah); | |
2d0f9eaf | 337 | break; |
1da177e4 | 338 | default: |
9a298b2a | 339 | kfree(map); |
1da177e4 LT |
340 | return -EINVAL; |
341 | } | |
342 | ||
9a298b2a | 343 | list = kmalloc(sizeof(*list), GFP_KERNEL); |
b5e89ed5 | 344 | if (!list) { |
85abb3f9 | 345 | if (map->type == _DRM_REGISTERS) |
004a7727 | 346 | iounmap(map->handle); |
9a298b2a | 347 | kfree(map); |
1da177e4 LT |
348 | return -EINVAL; |
349 | } | |
350 | memset(list, 0, sizeof(*list)); | |
351 | list->map = map; | |
352 | ||
30e2fb18 | 353 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 354 | list_add(&list->head, &dev->maplist); |
8d153f71 | 355 | |
d1f2b55a | 356 | /* Assign a 32-bit handle */ |
30e2fb18 | 357 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
358 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
359 | map->offset; | |
f1a2a9b6 DM |
360 | ret = drm_map_handle(dev, &list->hash, user_token, 0, |
361 | (map->type == _DRM_SHM)); | |
8d153f71 | 362 | if (ret) { |
85abb3f9 | 363 | if (map->type == _DRM_REGISTERS) |
004a7727 | 364 | iounmap(map->handle); |
9a298b2a EA |
365 | kfree(map); |
366 | kfree(list); | |
8d153f71 TH |
367 | mutex_unlock(&dev->struct_mutex); |
368 | return ret; | |
369 | } | |
370 | ||
1545085a | 371 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 372 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 373 | |
2ff2e8a3 BS |
374 | if (!(map->flags & _DRM_DRIVER)) |
375 | list->master = dev->primary->master; | |
89625eb1 | 376 | *maplist = list; |
7ab98401 | 377 | return 0; |
54ba2f76 | 378 | } |
89625eb1 | 379 | |
41c2e75e | 380 | int drm_addmap(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 381 | unsigned int size, enum drm_map_type type, |
f77d390c | 382 | enum drm_map_flags flags, struct drm_local_map ** map_ptr) |
89625eb1 | 383 | { |
55910517 | 384 | struct drm_map_list *list; |
89625eb1 DA |
385 | int rc; |
386 | ||
387 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
388 | if (!rc) | |
389 | *map_ptr = list->map; | |
390 | return rc; | |
391 | } | |
b5e89ed5 | 392 | |
7ab98401 DA |
393 | EXPORT_SYMBOL(drm_addmap); |
394 | ||
f77d390c BH |
395 | /** |
396 | * Ioctl to specify a range of memory that is available for mapping by a | |
397 | * non-root process. | |
398 | * | |
399 | * \param inode device inode. | |
400 | * \param file_priv DRM file private. | |
401 | * \param cmd command. | |
402 | * \param arg pointer to a drm_map structure. | |
403 | * \return zero on success or a negative value on error. | |
404 | * | |
405 | */ | |
c153f45f EA |
406 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
407 | struct drm_file *file_priv) | |
7ab98401 | 408 | { |
c153f45f | 409 | struct drm_map *map = data; |
55910517 | 410 | struct drm_map_list *maplist; |
7ab98401 DA |
411 | int err; |
412 | ||
7c1c2871 | 413 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
414 | return -EPERM; |
415 | ||
c153f45f EA |
416 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
417 | map->flags, &maplist); | |
7ab98401 | 418 | |
b5e89ed5 | 419 | if (err) |
7ab98401 | 420 | return err; |
d1f2b55a | 421 | |
67e1a014 | 422 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 423 | map->handle = (void *)(unsigned long)maplist->user_token; |
1da177e4 | 424 | return 0; |
88f399cd | 425 | } |
1da177e4 | 426 | |
1da177e4 LT |
427 | /** |
428 | * Remove a map private from list and deallocate resources if the mapping | |
429 | * isn't in use. | |
430 | * | |
1da177e4 LT |
431 | * Searches the map on drm_device::maplist, removes it from the list, see if |
432 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
433 | * being on use. | |
434 | * | |
7ab98401 | 435 | * \sa drm_addmap |
1da177e4 | 436 | */ |
f77d390c | 437 | int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 438 | { |
55910517 | 439 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 440 | drm_dma_handle_t dmah; |
bd1b331f | 441 | int found = 0; |
7c1c2871 | 442 | struct drm_master *master; |
1da177e4 | 443 | |
836cf046 | 444 | /* Find the list entry for the map and remove it */ |
bd1b331f | 445 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 446 | if (r_list->map == map) { |
7c1c2871 | 447 | master = r_list->master; |
bd1b331f | 448 | list_del(&r_list->head); |
1545085a TH |
449 | drm_ht_remove_key(&dev->map_hash, |
450 | r_list->user_token >> PAGE_SHIFT); | |
9a298b2a | 451 | kfree(r_list); |
bd1b331f | 452 | found = 1; |
836cf046 DA |
453 | break; |
454 | } | |
1da177e4 LT |
455 | } |
456 | ||
bd1b331f | 457 | if (!found) |
1da177e4 | 458 | return -EINVAL; |
1da177e4 | 459 | |
836cf046 DA |
460 | switch (map->type) { |
461 | case _DRM_REGISTERS: | |
004a7727 | 462 | iounmap(map->handle); |
836cf046 DA |
463 | /* FALLTHROUGH */ |
464 | case _DRM_FRAME_BUFFER: | |
465 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
466 | int retcode; | |
b5e89ed5 DA |
467 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
468 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 469 | } |
836cf046 DA |
470 | break; |
471 | case _DRM_SHM: | |
472 | vfree(map->handle); | |
7c1c2871 DA |
473 | if (master) { |
474 | if (dev->sigdata.lock == master->lock.hw_lock) | |
475 | dev->sigdata.lock = NULL; | |
476 | master->lock.hw_lock = NULL; /* SHM removed */ | |
477 | master->lock.file_priv = NULL; | |
171901d1 | 478 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 479 | } |
836cf046 DA |
480 | break; |
481 | case _DRM_AGP: | |
482 | case _DRM_SCATTER_GATHER: | |
483 | break; | |
484 | case _DRM_CONSISTENT: | |
485 | dmah.vaddr = map->handle; | |
486 | dmah.busaddr = map->offset; | |
487 | dmah.size = map->size; | |
488 | __drm_pci_free(dev, &dmah); | |
489 | break; | |
a2c0a97b JB |
490 | case _DRM_GEM: |
491 | DRM_ERROR("tried to rmmap GEM object\n"); | |
492 | break; | |
1da177e4 | 493 | } |
9a298b2a | 494 | kfree(map); |
836cf046 | 495 | |
1da177e4 LT |
496 | return 0; |
497 | } | |
4e74f36d | 498 | EXPORT_SYMBOL(drm_rmmap_locked); |
836cf046 | 499 | |
f77d390c | 500 | int drm_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 DA |
501 | { |
502 | int ret; | |
503 | ||
30e2fb18 | 504 | mutex_lock(&dev->struct_mutex); |
836cf046 | 505 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 506 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
507 | |
508 | return ret; | |
509 | } | |
ba8bbcf6 | 510 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 511 | |
836cf046 DA |
512 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
513 | * the last close of the device, and this is necessary for cleanup when things | |
514 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
515 | * like a pointless exercise since they're going away anyway. | |
516 | * | |
517 | * One use case might be after addmap is allowed for normal users for SHM and | |
518 | * gets used by drivers that the server doesn't need to care about. This seems | |
519 | * unlikely. | |
f77d390c BH |
520 | * |
521 | * \param inode device inode. | |
522 | * \param file_priv DRM file private. | |
523 | * \param cmd command. | |
524 | * \param arg pointer to a struct drm_map structure. | |
525 | * \return zero on success or a negative value on error. | |
836cf046 | 526 | */ |
c153f45f EA |
527 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
528 | struct drm_file *file_priv) | |
7ab98401 | 529 | { |
c153f45f | 530 | struct drm_map *request = data; |
f77d390c | 531 | struct drm_local_map *map = NULL; |
55910517 | 532 | struct drm_map_list *r_list; |
836cf046 | 533 | int ret; |
7ab98401 | 534 | |
30e2fb18 | 535 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 536 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 537 | if (r_list->map && |
c153f45f | 538 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
539 | r_list->map->flags & _DRM_REMOVABLE) { |
540 | map = r_list->map; | |
541 | break; | |
542 | } | |
543 | } | |
544 | ||
545 | /* List has wrapped around to the head pointer, or its empty we didn't | |
546 | * find anything. | |
547 | */ | |
bd1b331f | 548 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 549 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
550 | return -EINVAL; |
551 | } | |
552 | ||
836cf046 DA |
553 | /* Register and framebuffer maps are permanent */ |
554 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 555 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
556 | return 0; |
557 | } | |
558 | ||
559 | ret = drm_rmmap_locked(dev, map); | |
560 | ||
30e2fb18 | 561 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
562 | |
563 | return ret; | |
7ab98401 | 564 | } |
1da177e4 LT |
565 | |
566 | /** | |
567 | * Cleanup after an error on one of the addbufs() functions. | |
568 | * | |
836cf046 | 569 | * \param dev DRM device. |
1da177e4 LT |
570 | * \param entry buffer entry where the error occurred. |
571 | * | |
572 | * Frees any pages and buffers associated with the given entry. | |
573 | */ | |
cdd55a29 DA |
574 | static void drm_cleanup_buf_error(struct drm_device * dev, |
575 | struct drm_buf_entry * entry) | |
1da177e4 LT |
576 | { |
577 | int i; | |
578 | ||
579 | if (entry->seg_count) { | |
580 | for (i = 0; i < entry->seg_count; i++) { | |
581 | if (entry->seglist[i]) { | |
ddf19b97 | 582 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
583 | } |
584 | } | |
9a298b2a | 585 | kfree(entry->seglist); |
1da177e4 LT |
586 | |
587 | entry->seg_count = 0; | |
588 | } | |
589 | ||
b5e89ed5 DA |
590 | if (entry->buf_count) { |
591 | for (i = 0; i < entry->buf_count; i++) { | |
9a298b2a | 592 | kfree(entry->buflist[i].dev_private); |
1da177e4 | 593 | } |
9a298b2a | 594 | kfree(entry->buflist); |
1da177e4 LT |
595 | |
596 | entry->buf_count = 0; | |
597 | } | |
598 | } | |
599 | ||
600 | #if __OS_HAS_AGP | |
601 | /** | |
d59431bf | 602 | * Add AGP buffers for DMA transfers. |
1da177e4 | 603 | * |
84b1fd10 | 604 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 605 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 606 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 607 | * |
1da177e4 LT |
608 | * After some sanity checks creates a drm_buf structure for each buffer and |
609 | * reallocates the buffer list of the same size order to accommodate the new | |
610 | * buffers. | |
611 | */ | |
84b1fd10 | 612 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 613 | { |
cdd55a29 DA |
614 | struct drm_device_dma *dma = dev->dma; |
615 | struct drm_buf_entry *entry; | |
55910517 | 616 | struct drm_agp_mem *agp_entry; |
056219e2 | 617 | struct drm_buf *buf; |
1da177e4 LT |
618 | unsigned long offset; |
619 | unsigned long agp_offset; | |
620 | int count; | |
621 | int order; | |
622 | int size; | |
623 | int alignment; | |
624 | int page_order; | |
625 | int total; | |
626 | int byte_count; | |
54ba2f76 | 627 | int i, valid; |
056219e2 | 628 | struct drm_buf **temp_buflist; |
1da177e4 | 629 | |
b5e89ed5 DA |
630 | if (!dma) |
631 | return -EINVAL; | |
1da177e4 | 632 | |
d59431bf DA |
633 | count = request->count; |
634 | order = drm_order(request->size); | |
1da177e4 LT |
635 | size = 1 << order; |
636 | ||
b5e89ed5 DA |
637 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
638 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
639 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
640 | total = PAGE_SIZE << page_order; | |
641 | ||
642 | byte_count = 0; | |
d59431bf | 643 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 644 | |
b5e89ed5 DA |
645 | DRM_DEBUG("count: %d\n", count); |
646 | DRM_DEBUG("order: %d\n", order); | |
647 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 648 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
649 | DRM_DEBUG("alignment: %d\n", alignment); |
650 | DRM_DEBUG("page_order: %d\n", page_order); | |
651 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 652 | |
b5e89ed5 DA |
653 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
654 | return -EINVAL; | |
655 | if (dev->queue_count) | |
656 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 657 | |
54ba2f76 DA |
658 | /* Make sure buffers are located in AGP memory that we own */ |
659 | valid = 0; | |
bd1b331f | 660 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
661 | if ((agp_offset >= agp_entry->bound) && |
662 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
663 | valid = 1; | |
664 | break; | |
665 | } | |
666 | } | |
bd1b331f | 667 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
668 | DRM_DEBUG("zone invalid\n"); |
669 | return -EINVAL; | |
670 | } | |
b5e89ed5 DA |
671 | spin_lock(&dev->count_lock); |
672 | if (dev->buf_use) { | |
673 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
674 | return -EBUSY; |
675 | } | |
b5e89ed5 DA |
676 | atomic_inc(&dev->buf_alloc); |
677 | spin_unlock(&dev->count_lock); | |
1da177e4 | 678 | |
30e2fb18 | 679 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 680 | entry = &dma->bufs[order]; |
b5e89ed5 | 681 | if (entry->buf_count) { |
30e2fb18 | 682 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
683 | atomic_dec(&dev->buf_alloc); |
684 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
685 | } |
686 | ||
687 | if (count < 0 || count > 4096) { | |
30e2fb18 | 688 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 689 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
690 | return -EINVAL; |
691 | } | |
692 | ||
9a298b2a | 693 | entry->buflist = kmalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 694 | if (!entry->buflist) { |
30e2fb18 | 695 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 696 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
697 | return -ENOMEM; |
698 | } | |
b5e89ed5 | 699 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
700 | |
701 | entry->buf_size = size; | |
702 | entry->page_order = page_order; | |
703 | ||
704 | offset = 0; | |
705 | ||
b5e89ed5 DA |
706 | while (entry->buf_count < count) { |
707 | buf = &entry->buflist[entry->buf_count]; | |
708 | buf->idx = dma->buf_count + entry->buf_count; | |
709 | buf->total = alignment; | |
710 | buf->order = order; | |
711 | buf->used = 0; | |
1da177e4 | 712 | |
b5e89ed5 | 713 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
714 | buf->bus_address = agp_offset + offset; |
715 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 716 | buf->next = NULL; |
1da177e4 LT |
717 | buf->waiting = 0; |
718 | buf->pending = 0; | |
b5e89ed5 | 719 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 720 | buf->file_priv = NULL; |
1da177e4 LT |
721 | |
722 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
9a298b2a | 723 | buf->dev_private = kmalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 724 | if (!buf->dev_private) { |
1da177e4 LT |
725 | /* Set count correctly so we free the proper amount. */ |
726 | entry->buf_count = count; | |
b5e89ed5 | 727 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 728 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 729 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
730 | return -ENOMEM; |
731 | } | |
b5e89ed5 | 732 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 733 | |
b5e89ed5 | 734 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
735 | |
736 | offset += alignment; | |
737 | entry->buf_count++; | |
738 | byte_count += PAGE_SIZE << page_order; | |
739 | } | |
740 | ||
b5e89ed5 | 741 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 742 | |
9a298b2a EA |
743 | temp_buflist = krealloc(dma->buflist, |
744 | (dma->buf_count + entry->buf_count) * | |
745 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 746 | if (!temp_buflist) { |
1da177e4 | 747 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 748 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 749 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 750 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
751 | return -ENOMEM; |
752 | } | |
753 | dma->buflist = temp_buflist; | |
754 | ||
b5e89ed5 | 755 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
756 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
757 | } | |
758 | ||
759 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
760 | dma->seg_count += entry->seg_count; |
761 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
762 | dma->byte_count += byte_count; |
763 | ||
b5e89ed5 DA |
764 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
765 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 766 | |
30e2fb18 | 767 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 768 | |
d59431bf DA |
769 | request->count = entry->buf_count; |
770 | request->size = size; | |
1da177e4 LT |
771 | |
772 | dma->flags = _DRM_DMA_USE_AGP; | |
773 | ||
b5e89ed5 | 774 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
775 | return 0; |
776 | } | |
d84f76d3 | 777 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 778 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 779 | |
84b1fd10 | 780 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 781 | { |
cdd55a29 | 782 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
783 | int count; |
784 | int order; | |
785 | int size; | |
786 | int total; | |
787 | int page_order; | |
cdd55a29 | 788 | struct drm_buf_entry *entry; |
ddf19b97 | 789 | drm_dma_handle_t *dmah; |
056219e2 | 790 | struct drm_buf *buf; |
1da177e4 LT |
791 | int alignment; |
792 | unsigned long offset; | |
793 | int i; | |
794 | int byte_count; | |
795 | int page_count; | |
796 | unsigned long *temp_pagelist; | |
056219e2 | 797 | struct drm_buf **temp_buflist; |
1da177e4 | 798 | |
b5e89ed5 DA |
799 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
800 | return -EINVAL; | |
d985c108 | 801 | |
b5e89ed5 DA |
802 | if (!dma) |
803 | return -EINVAL; | |
1da177e4 | 804 | |
d985c108 DA |
805 | if (!capable(CAP_SYS_ADMIN)) |
806 | return -EPERM; | |
807 | ||
d59431bf DA |
808 | count = request->count; |
809 | order = drm_order(request->size); | |
1da177e4 LT |
810 | size = 1 << order; |
811 | ||
b5e89ed5 DA |
812 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
813 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 814 | |
b5e89ed5 DA |
815 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
816 | return -EINVAL; | |
817 | if (dev->queue_count) | |
818 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 819 | |
d59431bf | 820 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 821 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
822 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
823 | total = PAGE_SIZE << page_order; | |
824 | ||
b5e89ed5 DA |
825 | spin_lock(&dev->count_lock); |
826 | if (dev->buf_use) { | |
827 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
828 | return -EBUSY; |
829 | } | |
b5e89ed5 DA |
830 | atomic_inc(&dev->buf_alloc); |
831 | spin_unlock(&dev->count_lock); | |
1da177e4 | 832 | |
30e2fb18 | 833 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 834 | entry = &dma->bufs[order]; |
b5e89ed5 | 835 | if (entry->buf_count) { |
30e2fb18 | 836 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 837 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
838 | return -ENOMEM; /* May only call once for each order */ |
839 | } | |
840 | ||
841 | if (count < 0 || count > 4096) { | |
30e2fb18 | 842 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 843 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
844 | return -EINVAL; |
845 | } | |
846 | ||
9a298b2a | 847 | entry->buflist = kmalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 848 | if (!entry->buflist) { |
30e2fb18 | 849 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 850 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
851 | return -ENOMEM; |
852 | } | |
b5e89ed5 DA |
853 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
854 | ||
9a298b2a | 855 | entry->seglist = kmalloc(count * sizeof(*entry->seglist), GFP_KERNEL); |
b5e89ed5 | 856 | if (!entry->seglist) { |
9a298b2a | 857 | kfree(entry->buflist); |
30e2fb18 | 858 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 859 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
860 | return -ENOMEM; |
861 | } | |
b5e89ed5 | 862 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
863 | |
864 | /* Keep the original pagelist until we know all the allocations | |
865 | * have succeeded | |
866 | */ | |
9a298b2a EA |
867 | temp_pagelist = kmalloc((dma->page_count + (count << page_order)) * |
868 | sizeof(*dma->pagelist), GFP_KERNEL); | |
1da177e4 | 869 | if (!temp_pagelist) { |
9a298b2a EA |
870 | kfree(entry->buflist); |
871 | kfree(entry->seglist); | |
30e2fb18 | 872 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 873 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
874 | return -ENOMEM; |
875 | } | |
876 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
877 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
878 | DRM_DEBUG("pagelist: %d entries\n", | |
879 | dma->page_count + (count << page_order)); | |
1da177e4 | 880 | |
b5e89ed5 | 881 | entry->buf_size = size; |
1da177e4 LT |
882 | entry->page_order = page_order; |
883 | byte_count = 0; | |
884 | page_count = 0; | |
885 | ||
b5e89ed5 | 886 | while (entry->buf_count < count) { |
bc5f4523 | 887 | |
ddf19b97 | 888 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); |
bc5f4523 | 889 | |
ddf19b97 | 890 | if (!dmah) { |
1da177e4 LT |
891 | /* Set count correctly so we free the proper amount. */ |
892 | entry->buf_count = count; | |
893 | entry->seg_count = count; | |
894 | drm_cleanup_buf_error(dev, entry); | |
9a298b2a | 895 | kfree(temp_pagelist); |
30e2fb18 | 896 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 897 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
898 | return -ENOMEM; |
899 | } | |
ddf19b97 | 900 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
901 | for (i = 0; i < (1 << page_order); i++) { |
902 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
903 | dma->page_count + page_count, | |
ddf19b97 | 904 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 905 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 906 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 907 | } |
b5e89ed5 DA |
908 | for (offset = 0; |
909 | offset + size <= total && entry->buf_count < count; | |
910 | offset += alignment, ++entry->buf_count) { | |
911 | buf = &entry->buflist[entry->buf_count]; | |
912 | buf->idx = dma->buf_count + entry->buf_count; | |
913 | buf->total = alignment; | |
914 | buf->order = order; | |
915 | buf->used = 0; | |
916 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
917 | buf->address = (void *)(dmah->vaddr + offset); |
918 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 919 | buf->next = NULL; |
1da177e4 LT |
920 | buf->waiting = 0; |
921 | buf->pending = 0; | |
b5e89ed5 | 922 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 923 | buf->file_priv = NULL; |
1da177e4 LT |
924 | |
925 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
9a298b2a EA |
926 | buf->dev_private = kmalloc(buf->dev_priv_size, |
927 | GFP_KERNEL); | |
b5e89ed5 | 928 | if (!buf->dev_private) { |
1da177e4 LT |
929 | /* Set count correctly so we free the proper amount. */ |
930 | entry->buf_count = count; | |
931 | entry->seg_count = count; | |
b5e89ed5 | 932 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 933 | kfree(temp_pagelist); |
30e2fb18 | 934 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 935 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
936 | return -ENOMEM; |
937 | } | |
b5e89ed5 | 938 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 939 | |
b5e89ed5 DA |
940 | DRM_DEBUG("buffer %d @ %p\n", |
941 | entry->buf_count, buf->address); | |
1da177e4 LT |
942 | } |
943 | byte_count += PAGE_SIZE << page_order; | |
944 | } | |
945 | ||
9a298b2a EA |
946 | temp_buflist = krealloc(dma->buflist, |
947 | (dma->buf_count + entry->buf_count) * | |
948 | sizeof(*dma->buflist), GFP_KERNEL); | |
1da177e4 LT |
949 | if (!temp_buflist) { |
950 | /* Free the entry because it isn't valid */ | |
b5e89ed5 | 951 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 952 | kfree(temp_pagelist); |
30e2fb18 | 953 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 954 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
955 | return -ENOMEM; |
956 | } | |
957 | dma->buflist = temp_buflist; | |
958 | ||
b5e89ed5 | 959 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
960 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
961 | } | |
962 | ||
963 | /* No allocations failed, so now we can replace the orginal pagelist | |
964 | * with the new one. | |
965 | */ | |
966 | if (dma->page_count) { | |
9a298b2a | 967 | kfree(dma->pagelist); |
1da177e4 LT |
968 | } |
969 | dma->pagelist = temp_pagelist; | |
970 | ||
971 | dma->buf_count += entry->buf_count; | |
972 | dma->seg_count += entry->seg_count; | |
973 | dma->page_count += entry->seg_count << page_order; | |
974 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
975 | ||
30e2fb18 | 976 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 977 | |
d59431bf DA |
978 | request->count = entry->buf_count; |
979 | request->size = size; | |
1da177e4 | 980 | |
3417f33e GS |
981 | if (request->flags & _DRM_PCI_BUFFER_RO) |
982 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
983 | ||
b5e89ed5 | 984 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
985 | return 0; |
986 | ||
987 | } | |
d84f76d3 | 988 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 989 | |
84b1fd10 | 990 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 991 | { |
cdd55a29 DA |
992 | struct drm_device_dma *dma = dev->dma; |
993 | struct drm_buf_entry *entry; | |
056219e2 | 994 | struct drm_buf *buf; |
1da177e4 LT |
995 | unsigned long offset; |
996 | unsigned long agp_offset; | |
997 | int count; | |
998 | int order; | |
999 | int size; | |
1000 | int alignment; | |
1001 | int page_order; | |
1002 | int total; | |
1003 | int byte_count; | |
1004 | int i; | |
056219e2 | 1005 | struct drm_buf **temp_buflist; |
1da177e4 | 1006 | |
b5e89ed5 DA |
1007 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
1008 | return -EINVAL; | |
1009 | ||
1010 | if (!dma) | |
1011 | return -EINVAL; | |
1da177e4 | 1012 | |
d985c108 DA |
1013 | if (!capable(CAP_SYS_ADMIN)) |
1014 | return -EPERM; | |
1015 | ||
d59431bf DA |
1016 | count = request->count; |
1017 | order = drm_order(request->size); | |
1da177e4 LT |
1018 | size = 1 << order; |
1019 | ||
b5e89ed5 DA |
1020 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
1021 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
1022 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
1023 | total = PAGE_SIZE << page_order; | |
1024 | ||
1025 | byte_count = 0; | |
d59431bf | 1026 | agp_offset = request->agp_start; |
1da177e4 | 1027 | |
b5e89ed5 DA |
1028 | DRM_DEBUG("count: %d\n", count); |
1029 | DRM_DEBUG("order: %d\n", order); | |
1030 | DRM_DEBUG("size: %d\n", size); | |
1031 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1032 | DRM_DEBUG("alignment: %d\n", alignment); | |
1033 | DRM_DEBUG("page_order: %d\n", page_order); | |
1034 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1035 | |
b5e89ed5 DA |
1036 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1037 | return -EINVAL; | |
1038 | if (dev->queue_count) | |
1039 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1040 | |
b5e89ed5 DA |
1041 | spin_lock(&dev->count_lock); |
1042 | if (dev->buf_use) { | |
1043 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1044 | return -EBUSY; |
1045 | } | |
b5e89ed5 DA |
1046 | atomic_inc(&dev->buf_alloc); |
1047 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1048 | |
30e2fb18 | 1049 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1050 | entry = &dma->bufs[order]; |
b5e89ed5 | 1051 | if (entry->buf_count) { |
30e2fb18 | 1052 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1053 | atomic_dec(&dev->buf_alloc); |
1054 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1055 | } |
1056 | ||
1057 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1058 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1059 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1060 | return -EINVAL; |
1061 | } | |
1062 | ||
9a298b2a EA |
1063 | entry->buflist = kmalloc(count * sizeof(*entry->buflist), |
1064 | GFP_KERNEL); | |
b5e89ed5 | 1065 | if (!entry->buflist) { |
30e2fb18 | 1066 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1067 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1068 | return -ENOMEM; |
1069 | } | |
b5e89ed5 | 1070 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
1071 | |
1072 | entry->buf_size = size; | |
1073 | entry->page_order = page_order; | |
1074 | ||
1075 | offset = 0; | |
1076 | ||
b5e89ed5 DA |
1077 | while (entry->buf_count < count) { |
1078 | buf = &entry->buflist[entry->buf_count]; | |
1079 | buf->idx = dma->buf_count + entry->buf_count; | |
1080 | buf->total = alignment; | |
1081 | buf->order = order; | |
1082 | buf->used = 0; | |
1da177e4 | 1083 | |
b5e89ed5 | 1084 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1085 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1086 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1087 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1088 | buf->next = NULL; |
1da177e4 LT |
1089 | buf->waiting = 0; |
1090 | buf->pending = 0; | |
b5e89ed5 | 1091 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 1092 | buf->file_priv = NULL; |
1da177e4 LT |
1093 | |
1094 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
9a298b2a | 1095 | buf->dev_private = kmalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 1096 | if (!buf->dev_private) { |
1da177e4 LT |
1097 | /* Set count correctly so we free the proper amount. */ |
1098 | entry->buf_count = count; | |
b5e89ed5 | 1099 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1100 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1101 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1102 | return -ENOMEM; |
1103 | } | |
1104 | ||
b5e89ed5 | 1105 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1106 | |
b5e89ed5 | 1107 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1108 | |
1109 | offset += alignment; | |
1110 | entry->buf_count++; | |
1111 | byte_count += PAGE_SIZE << page_order; | |
1112 | } | |
1113 | ||
b5e89ed5 | 1114 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1115 | |
9a298b2a EA |
1116 | temp_buflist = krealloc(dma->buflist, |
1117 | (dma->buf_count + entry->buf_count) * | |
1118 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 1119 | if (!temp_buflist) { |
1da177e4 | 1120 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1121 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1122 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1123 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1124 | return -ENOMEM; |
1125 | } | |
1126 | dma->buflist = temp_buflist; | |
1127 | ||
b5e89ed5 | 1128 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1129 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1130 | } | |
1131 | ||
1132 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1133 | dma->seg_count += entry->seg_count; |
1134 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1135 | dma->byte_count += byte_count; |
1136 | ||
b5e89ed5 DA |
1137 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1138 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1139 | |
30e2fb18 | 1140 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1141 | |
d59431bf DA |
1142 | request->count = entry->buf_count; |
1143 | request->size = size; | |
1da177e4 LT |
1144 | |
1145 | dma->flags = _DRM_DMA_USE_SG; | |
1146 | ||
b5e89ed5 | 1147 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1148 | return 0; |
1149 | } | |
1150 | ||
84b1fd10 | 1151 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1152 | { |
cdd55a29 DA |
1153 | struct drm_device_dma *dma = dev->dma; |
1154 | struct drm_buf_entry *entry; | |
056219e2 | 1155 | struct drm_buf *buf; |
b84397d6 DA |
1156 | unsigned long offset; |
1157 | unsigned long agp_offset; | |
1158 | int count; | |
1159 | int order; | |
1160 | int size; | |
1161 | int alignment; | |
1162 | int page_order; | |
1163 | int total; | |
1164 | int byte_count; | |
1165 | int i; | |
056219e2 | 1166 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1167 | |
1168 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1169 | return -EINVAL; | |
b5e89ed5 | 1170 | |
b84397d6 DA |
1171 | if (!dma) |
1172 | return -EINVAL; | |
1173 | ||
d985c108 DA |
1174 | if (!capable(CAP_SYS_ADMIN)) |
1175 | return -EPERM; | |
1176 | ||
d59431bf DA |
1177 | count = request->count; |
1178 | order = drm_order(request->size); | |
b84397d6 DA |
1179 | size = 1 << order; |
1180 | ||
d59431bf | 1181 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1182 | ? PAGE_ALIGN(size) : size; |
1183 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1184 | total = PAGE_SIZE << page_order; | |
1185 | ||
1186 | byte_count = 0; | |
d59431bf | 1187 | agp_offset = request->agp_start; |
b84397d6 DA |
1188 | |
1189 | DRM_DEBUG("count: %d\n", count); | |
1190 | DRM_DEBUG("order: %d\n", order); | |
1191 | DRM_DEBUG("size: %d\n", size); | |
1192 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1193 | DRM_DEBUG("alignment: %d\n", alignment); | |
1194 | DRM_DEBUG("page_order: %d\n", page_order); | |
1195 | DRM_DEBUG("total: %d\n", total); | |
1196 | ||
1197 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1198 | return -EINVAL; | |
1199 | if (dev->queue_count) | |
1200 | return -EBUSY; /* Not while in use */ | |
1201 | ||
1202 | spin_lock(&dev->count_lock); | |
1203 | if (dev->buf_use) { | |
1204 | spin_unlock(&dev->count_lock); | |
1205 | return -EBUSY; | |
1206 | } | |
1207 | atomic_inc(&dev->buf_alloc); | |
1208 | spin_unlock(&dev->count_lock); | |
1209 | ||
30e2fb18 | 1210 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1211 | entry = &dma->bufs[order]; |
1212 | if (entry->buf_count) { | |
30e2fb18 | 1213 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1214 | atomic_dec(&dev->buf_alloc); |
1215 | return -ENOMEM; /* May only call once for each order */ | |
1216 | } | |
1217 | ||
1218 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1219 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1220 | atomic_dec(&dev->buf_alloc); |
1221 | return -EINVAL; | |
1222 | } | |
1223 | ||
9a298b2a EA |
1224 | entry->buflist = kmalloc(count * sizeof(*entry->buflist), |
1225 | GFP_KERNEL); | |
b84397d6 | 1226 | if (!entry->buflist) { |
30e2fb18 | 1227 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1228 | atomic_dec(&dev->buf_alloc); |
1229 | return -ENOMEM; | |
1230 | } | |
1231 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1232 | ||
1233 | entry->buf_size = size; | |
1234 | entry->page_order = page_order; | |
1235 | ||
1236 | offset = 0; | |
1237 | ||
1238 | while (entry->buf_count < count) { | |
1239 | buf = &entry->buflist[entry->buf_count]; | |
1240 | buf->idx = dma->buf_count + entry->buf_count; | |
1241 | buf->total = alignment; | |
1242 | buf->order = order; | |
1243 | buf->used = 0; | |
1244 | ||
1245 | buf->offset = (dma->byte_count + offset); | |
1246 | buf->bus_address = agp_offset + offset; | |
1247 | buf->address = (void *)(agp_offset + offset); | |
1248 | buf->next = NULL; | |
1249 | buf->waiting = 0; | |
1250 | buf->pending = 0; | |
1251 | init_waitqueue_head(&buf->dma_wait); | |
6c340eac | 1252 | buf->file_priv = NULL; |
b84397d6 DA |
1253 | |
1254 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
9a298b2a | 1255 | buf->dev_private = kmalloc(buf->dev_priv_size, GFP_KERNEL); |
b84397d6 DA |
1256 | if (!buf->dev_private) { |
1257 | /* Set count correctly so we free the proper amount. */ | |
1258 | entry->buf_count = count; | |
1259 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1260 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1261 | atomic_dec(&dev->buf_alloc); |
1262 | return -ENOMEM; | |
1263 | } | |
1264 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1265 | ||
1266 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1267 | ||
1268 | offset += alignment; | |
1269 | entry->buf_count++; | |
1270 | byte_count += PAGE_SIZE << page_order; | |
1271 | } | |
1272 | ||
1273 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1274 | ||
9a298b2a EA |
1275 | temp_buflist = krealloc(dma->buflist, |
1276 | (dma->buf_count + entry->buf_count) * | |
1277 | sizeof(*dma->buflist), GFP_KERNEL); | |
b84397d6 DA |
1278 | if (!temp_buflist) { |
1279 | /* Free the entry because it isn't valid */ | |
1280 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1281 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1282 | atomic_dec(&dev->buf_alloc); |
1283 | return -ENOMEM; | |
1284 | } | |
1285 | dma->buflist = temp_buflist; | |
1286 | ||
1287 | for (i = 0; i < entry->buf_count; i++) { | |
1288 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1289 | } | |
1290 | ||
1291 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1292 | dma->seg_count += entry->seg_count; |
1293 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1294 | dma->byte_count += byte_count; |
1295 | ||
1296 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1297 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1298 | ||
30e2fb18 | 1299 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1300 | |
d59431bf DA |
1301 | request->count = entry->buf_count; |
1302 | request->size = size; | |
b84397d6 DA |
1303 | |
1304 | dma->flags = _DRM_DMA_USE_FB; | |
1305 | ||
1306 | atomic_dec(&dev->buf_alloc); | |
1307 | return 0; | |
1308 | } | |
d985c108 | 1309 | |
b84397d6 | 1310 | |
1da177e4 LT |
1311 | /** |
1312 | * Add buffers for DMA transfers (ioctl). | |
1313 | * | |
1314 | * \param inode device inode. | |
6c340eac | 1315 | * \param file_priv DRM file private. |
1da177e4 | 1316 | * \param cmd command. |
c60ce623 | 1317 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1318 | * \return zero on success or a negative number on failure. |
1319 | * | |
1320 | * According with the memory type specified in drm_buf_desc::flags and the | |
1321 | * build options, it dispatches the call either to addbufs_agp(), | |
1322 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1323 | * PCI memory respectively. | |
1324 | */ | |
c153f45f EA |
1325 | int drm_addbufs(struct drm_device *dev, void *data, |
1326 | struct drm_file *file_priv) | |
1da177e4 | 1327 | { |
c153f45f | 1328 | struct drm_buf_desc *request = data; |
d59431bf | 1329 | int ret; |
b5e89ed5 | 1330 | |
1da177e4 LT |
1331 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1332 | return -EINVAL; | |
1333 | ||
1da177e4 | 1334 | #if __OS_HAS_AGP |
c153f45f EA |
1335 | if (request->flags & _DRM_AGP_BUFFER) |
1336 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1337 | else |
1338 | #endif | |
c153f45f EA |
1339 | if (request->flags & _DRM_SG_BUFFER) |
1340 | ret = drm_addbufs_sg(dev, request); | |
1341 | else if (request->flags & _DRM_FB_BUFFER) | |
1342 | ret = drm_addbufs_fb(dev, request); | |
1da177e4 | 1343 | else |
c153f45f | 1344 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1345 | |
d59431bf | 1346 | return ret; |
1da177e4 LT |
1347 | } |
1348 | ||
1da177e4 LT |
1349 | /** |
1350 | * Get information about the buffer mappings. | |
1351 | * | |
1352 | * This was originally mean for debugging purposes, or by a sophisticated | |
1353 | * client library to determine how best to use the available buffers (e.g., | |
1354 | * large buffers can be used for image transfer). | |
1355 | * | |
1356 | * \param inode device inode. | |
6c340eac | 1357 | * \param file_priv DRM file private. |
1da177e4 LT |
1358 | * \param cmd command. |
1359 | * \param arg pointer to a drm_buf_info structure. | |
1360 | * \return zero on success or a negative number on failure. | |
1361 | * | |
1362 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1363 | * lock, preventing of allocating more buffers after this call. Information | |
1364 | * about each requested buffer is then copied into user space. | |
1365 | */ | |
c153f45f EA |
1366 | int drm_infobufs(struct drm_device *dev, void *data, |
1367 | struct drm_file *file_priv) | |
1da177e4 | 1368 | { |
cdd55a29 | 1369 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1370 | struct drm_buf_info *request = data; |
1da177e4 LT |
1371 | int i; |
1372 | int count; | |
1373 | ||
1374 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1375 | return -EINVAL; | |
1376 | ||
b5e89ed5 DA |
1377 | if (!dma) |
1378 | return -EINVAL; | |
1da177e4 | 1379 | |
b5e89ed5 DA |
1380 | spin_lock(&dev->count_lock); |
1381 | if (atomic_read(&dev->buf_alloc)) { | |
1382 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1383 | return -EBUSY; |
1384 | } | |
1385 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1386 | spin_unlock(&dev->count_lock); |
1da177e4 | 1387 | |
b5e89ed5 DA |
1388 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1389 | if (dma->bufs[i].buf_count) | |
1390 | ++count; | |
1da177e4 LT |
1391 | } |
1392 | ||
b5e89ed5 | 1393 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1394 | |
c153f45f | 1395 | if (request->count >= count) { |
b5e89ed5 DA |
1396 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1397 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1398 | struct drm_buf_desc __user *to = |
c153f45f | 1399 | &request->list[count]; |
cdd55a29 DA |
1400 | struct drm_buf_entry *from = &dma->bufs[i]; |
1401 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1402 | if (copy_to_user(&to->count, |
1403 | &from->buf_count, | |
1404 | sizeof(from->buf_count)) || | |
1405 | copy_to_user(&to->size, | |
1406 | &from->buf_size, | |
1407 | sizeof(from->buf_size)) || | |
1408 | copy_to_user(&to->low_mark, | |
1409 | &list->low_mark, | |
1410 | sizeof(list->low_mark)) || | |
1411 | copy_to_user(&to->high_mark, | |
1412 | &list->high_mark, | |
1413 | sizeof(list->high_mark))) | |
1da177e4 LT |
1414 | return -EFAULT; |
1415 | ||
b5e89ed5 DA |
1416 | DRM_DEBUG("%d %d %d %d %d\n", |
1417 | i, | |
1418 | dma->bufs[i].buf_count, | |
1419 | dma->bufs[i].buf_size, | |
1420 | dma->bufs[i].freelist.low_mark, | |
1421 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1422 | ++count; |
1423 | } | |
1424 | } | |
1425 | } | |
c153f45f | 1426 | request->count = count; |
1da177e4 LT |
1427 | |
1428 | return 0; | |
1429 | } | |
1430 | ||
1431 | /** | |
1432 | * Specifies a low and high water mark for buffer allocation | |
1433 | * | |
1434 | * \param inode device inode. | |
6c340eac | 1435 | * \param file_priv DRM file private. |
1da177e4 LT |
1436 | * \param cmd command. |
1437 | * \param arg a pointer to a drm_buf_desc structure. | |
1438 | * \return zero on success or a negative number on failure. | |
1439 | * | |
1440 | * Verifies that the size order is bounded between the admissible orders and | |
1441 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1442 | * | |
1443 | * \note This ioctl is deprecated and mostly never used. | |
1444 | */ | |
c153f45f EA |
1445 | int drm_markbufs(struct drm_device *dev, void *data, |
1446 | struct drm_file *file_priv) | |
1da177e4 | 1447 | { |
cdd55a29 | 1448 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1449 | struct drm_buf_desc *request = data; |
1da177e4 | 1450 | int order; |
cdd55a29 | 1451 | struct drm_buf_entry *entry; |
1da177e4 LT |
1452 | |
1453 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1454 | return -EINVAL; | |
1455 | ||
b5e89ed5 DA |
1456 | if (!dma) |
1457 | return -EINVAL; | |
1da177e4 | 1458 | |
b5e89ed5 | 1459 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f EA |
1460 | request->size, request->low_mark, request->high_mark); |
1461 | order = drm_order(request->size); | |
b5e89ed5 DA |
1462 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1463 | return -EINVAL; | |
1da177e4 LT |
1464 | entry = &dma->bufs[order]; |
1465 | ||
c153f45f | 1466 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1467 | return -EINVAL; |
c153f45f | 1468 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1469 | return -EINVAL; |
1470 | ||
c153f45f EA |
1471 | entry->freelist.low_mark = request->low_mark; |
1472 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1473 | |
1474 | return 0; | |
1475 | } | |
1476 | ||
1477 | /** | |
b5e89ed5 | 1478 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1479 | * |
1480 | * \param inode device inode. | |
6c340eac | 1481 | * \param file_priv DRM file private. |
1da177e4 LT |
1482 | * \param cmd command. |
1483 | * \param arg pointer to a drm_buf_free structure. | |
1484 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1485 | * |
1da177e4 LT |
1486 | * Calls free_buffer() for each used buffer. |
1487 | * This function is primarily used for debugging. | |
1488 | */ | |
c153f45f EA |
1489 | int drm_freebufs(struct drm_device *dev, void *data, |
1490 | struct drm_file *file_priv) | |
1da177e4 | 1491 | { |
cdd55a29 | 1492 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1493 | struct drm_buf_free *request = data; |
1da177e4 LT |
1494 | int i; |
1495 | int idx; | |
056219e2 | 1496 | struct drm_buf *buf; |
1da177e4 LT |
1497 | |
1498 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1499 | return -EINVAL; | |
1500 | ||
b5e89ed5 DA |
1501 | if (!dma) |
1502 | return -EINVAL; | |
1da177e4 | 1503 | |
c153f45f EA |
1504 | DRM_DEBUG("%d\n", request->count); |
1505 | for (i = 0; i < request->count; i++) { | |
1506 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1507 | return -EFAULT; |
b5e89ed5 DA |
1508 | if (idx < 0 || idx >= dma->buf_count) { |
1509 | DRM_ERROR("Index %d (of %d max)\n", | |
1510 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1511 | return -EINVAL; |
1512 | } | |
1513 | buf = dma->buflist[idx]; | |
6c340eac | 1514 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1515 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1516 | task_pid_nr(current)); |
1da177e4 LT |
1517 | return -EINVAL; |
1518 | } | |
b5e89ed5 | 1519 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1520 | } |
1521 | ||
1522 | return 0; | |
1523 | } | |
1524 | ||
1525 | /** | |
1526 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1527 | * | |
1528 | * \param inode device inode. | |
6c340eac | 1529 | * \param file_priv DRM file private. |
1da177e4 LT |
1530 | * \param cmd command. |
1531 | * \param arg pointer to a drm_buf_map structure. | |
1532 | * \return zero on success or a negative number on failure. | |
1533 | * | |
3417f33e GS |
1534 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1535 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1536 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1537 | * drm_mmap_dma(). | |
1da177e4 | 1538 | */ |
c153f45f EA |
1539 | int drm_mapbufs(struct drm_device *dev, void *data, |
1540 | struct drm_file *file_priv) | |
1da177e4 | 1541 | { |
cdd55a29 | 1542 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1543 | int retcode = 0; |
1544 | const int zero = 0; | |
1545 | unsigned long virtual; | |
1546 | unsigned long address; | |
c153f45f | 1547 | struct drm_buf_map *request = data; |
1da177e4 LT |
1548 | int i; |
1549 | ||
1550 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1551 | return -EINVAL; | |
1552 | ||
b5e89ed5 DA |
1553 | if (!dma) |
1554 | return -EINVAL; | |
1da177e4 | 1555 | |
b5e89ed5 DA |
1556 | spin_lock(&dev->count_lock); |
1557 | if (atomic_read(&dev->buf_alloc)) { | |
1558 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1559 | return -EBUSY; |
1560 | } | |
1561 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1562 | spin_unlock(&dev->count_lock); |
1da177e4 | 1563 | |
c153f45f | 1564 | if (request->count >= dma->buf_count) { |
b84397d6 | 1565 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1566 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1567 | && (dma->flags & _DRM_DMA_USE_SG)) |
1568 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1569 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
f77d390c | 1570 | struct drm_local_map *map = dev->agp_buffer_map; |
d1f2b55a | 1571 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1572 | |
b5e89ed5 | 1573 | if (!map) { |
1da177e4 LT |
1574 | retcode = -EINVAL; |
1575 | goto done; | |
1576 | } | |
b5e89ed5 | 1577 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1578 | virtual = do_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1579 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1580 | MAP_SHARED, |
1581 | token); | |
b5e89ed5 | 1582 | up_write(¤t->mm->mmap_sem); |
1da177e4 | 1583 | } else { |
b5e89ed5 | 1584 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1585 | virtual = do_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1586 | PROT_READ | PROT_WRITE, |
1587 | MAP_SHARED, 0); | |
1588 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1589 | } |
b5e89ed5 | 1590 | if (virtual > -1024UL) { |
1da177e4 LT |
1591 | /* Real error */ |
1592 | retcode = (signed long)virtual; | |
1593 | goto done; | |
1594 | } | |
c153f45f | 1595 | request->virtual = (void __user *)virtual; |
1da177e4 | 1596 | |
b5e89ed5 | 1597 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1598 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1599 | &dma->buflist[i]->idx, |
c153f45f | 1600 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1601 | retcode = -EFAULT; |
1602 | goto done; | |
1603 | } | |
c153f45f | 1604 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1605 | &dma->buflist[i]->total, |
c153f45f | 1606 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1607 | retcode = -EFAULT; |
1608 | goto done; | |
1609 | } | |
c153f45f | 1610 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1611 | &zero, sizeof(zero))) { |
1da177e4 LT |
1612 | retcode = -EFAULT; |
1613 | goto done; | |
1614 | } | |
b5e89ed5 | 1615 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1616 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1617 | &address, sizeof(address))) { |
1da177e4 LT |
1618 | retcode = -EFAULT; |
1619 | goto done; | |
1620 | } | |
1621 | } | |
1622 | } | |
b5e89ed5 | 1623 | done: |
c153f45f EA |
1624 | request->count = dma->buf_count; |
1625 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1626 | |
1627 | return retcode; | |
1628 | } | |
1629 | ||
836cf046 DA |
1630 | /** |
1631 | * Compute size order. Returns the exponent of the smaller power of two which | |
1632 | * is greater or equal to given number. | |
b5e89ed5 | 1633 | * |
836cf046 DA |
1634 | * \param size size. |
1635 | * \return order. | |
1636 | * | |
1637 | * \todo Can be made faster. | |
1638 | */ | |
b5e89ed5 | 1639 | int drm_order(unsigned long size) |
836cf046 DA |
1640 | { |
1641 | int order; | |
1642 | unsigned long tmp; | |
1643 | ||
b5e89ed5 | 1644 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1645 | |
1646 | if (size & (size - 1)) | |
1647 | ++order; | |
1648 | ||
1649 | return order; | |
1650 | } | |
1651 | EXPORT_SYMBOL(drm_order); |