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Commit | Line | Data |
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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> | |
37 | #include "drmP.h" | |
38 | ||
84b1fd10 | 39 | unsigned long drm_get_resource_start(struct drm_device *dev, unsigned int resource) |
1da177e4 | 40 | { |
836cf046 DA |
41 | return pci_resource_start(dev->pdev, resource); |
42 | } | |
43 | EXPORT_SYMBOL(drm_get_resource_start); | |
1da177e4 | 44 | |
84b1fd10 | 45 | unsigned long drm_get_resource_len(struct drm_device *dev, unsigned int resource) |
836cf046 DA |
46 | { |
47 | return pci_resource_len(dev->pdev, resource); | |
48 | } | |
b5e89ed5 | 49 | |
836cf046 | 50 | EXPORT_SYMBOL(drm_get_resource_len); |
1da177e4 | 51 | |
55910517 | 52 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
d985c108 | 53 | drm_local_map_t *map) |
836cf046 | 54 | { |
55910517 | 55 | struct drm_map_list *entry; |
bd1b331f | 56 | list_for_each_entry(entry, &dev->maplist, head) { |
836cf046 | 57 | if (entry->map && map->type == entry->map->type && |
54ba2f76 DA |
58 | ((entry->map->offset == map->offset) || |
59 | (map->type == _DRM_SHM && map->flags==_DRM_CONTAINS_LOCK))) { | |
89625eb1 | 60 | return entry; |
836cf046 DA |
61 | } |
62 | } | |
63 | ||
64 | return NULL; | |
1da177e4 | 65 | } |
1da177e4 | 66 | |
e0be428e | 67 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
fb41e54b | 68 | unsigned long user_token, int hashed_handle) |
d1f2b55a | 69 | { |
8d153f71 | 70 | int use_hashed_handle; |
c2604ce0 | 71 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
72 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
73 | #elif (BITS_PER_LONG == 32) | |
74 | use_hashed_handle = hashed_handle; | |
75 | #else | |
76 | #error Unsupported long size. Neither 64 nor 32 bits. | |
77 | #endif | |
d1f2b55a | 78 | |
e08870c8 TH |
79 | if (!use_hashed_handle) { |
80 | int ret; | |
1545085a | 81 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
82 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
83 | if (ret != -EINVAL) | |
84 | return ret; | |
d1f2b55a | 85 | } |
e08870c8 TH |
86 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
87 | user_token, 32 - PAGE_SHIFT - 3, | |
1545085a | 88 | 0, DRM_MAP_HASH_OFFSET >> PAGE_SHIFT); |
d1f2b55a | 89 | } |
9a186645 | 90 | |
1da177e4 LT |
91 | /** |
92 | * Ioctl to specify a range of memory that is available for mapping by a non-root process. | |
93 | * | |
94 | * \param inode device inode. | |
95 | * \param filp file pointer. | |
96 | * \param cmd command. | |
97 | * \param arg pointer to a drm_map structure. | |
98 | * \return zero on success or a negative value on error. | |
99 | * | |
100 | * Adjusts the memory offset to its absolute value according to the mapping | |
101 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
102 | * applicable and if supported by the kernel. | |
103 | */ | |
84b1fd10 | 104 | static int drm_addmap_core(struct drm_device * dev, unsigned int offset, |
c60ce623 | 105 | unsigned int size, enum drm_map_type type, |
55910517 DA |
106 | enum drm_map_flags flags, |
107 | struct drm_map_list ** maplist) | |
1da177e4 | 108 | { |
c60ce623 | 109 | struct drm_map *map; |
55910517 | 110 | struct drm_map_list *list; |
9c8da5eb | 111 | drm_dma_handle_t *dmah; |
8d153f71 TH |
112 | unsigned long user_token; |
113 | int ret; | |
1da177e4 | 114 | |
b5e89ed5 DA |
115 | map = drm_alloc(sizeof(*map), DRM_MEM_MAPS); |
116 | if (!map) | |
1da177e4 LT |
117 | return -ENOMEM; |
118 | ||
7ab98401 DA |
119 | map->offset = offset; |
120 | map->size = size; | |
121 | map->flags = flags; | |
122 | map->type = type; | |
1da177e4 LT |
123 | |
124 | /* Only allow shared memory to be removable since we only keep enough | |
125 | * book keeping information about shared memory to allow for removal | |
126 | * when processes fork. | |
127 | */ | |
b5e89ed5 DA |
128 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
129 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
130 | return -EINVAL; |
131 | } | |
b5e89ed5 DA |
132 | DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n", |
133 | map->offset, map->size, map->type); | |
134 | if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) { | |
135 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
136 | return -EINVAL; |
137 | } | |
b5e89ed5 | 138 | map->mtrr = -1; |
1da177e4 LT |
139 | map->handle = NULL; |
140 | ||
b5e89ed5 | 141 | switch (map->type) { |
1da177e4 LT |
142 | case _DRM_REGISTERS: |
143 | case _DRM_FRAME_BUFFER: | |
88f399cd | 144 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) |
8d2ea625 | 145 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 DA |
146 | map->offset < virt_to_phys(high_memory)) { |
147 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
148 | return -EINVAL; |
149 | } | |
150 | #endif | |
151 | #ifdef __alpha__ | |
152 | map->offset += dev->hose->mem_space->start; | |
153 | #endif | |
836cf046 DA |
154 | /* Some drivers preinitialize some maps, without the X Server |
155 | * needing to be aware of it. Therefore, we just return success | |
156 | * when the server tries to create a duplicate map. | |
157 | */ | |
89625eb1 DA |
158 | list = drm_find_matching_map(dev, map); |
159 | if (list != NULL) { | |
160 | if (list->map->size != map->size) { | |
836cf046 | 161 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
162 | "mismatched sizes, (%ld vs %ld)\n", |
163 | map->type, map->size, | |
164 | list->map->size); | |
89625eb1 | 165 | list->map->size = map->size; |
836cf046 DA |
166 | } |
167 | ||
168 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
89625eb1 | 169 | *maplist = list; |
836cf046 DA |
170 | return 0; |
171 | } | |
172 | ||
1da177e4 | 173 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
174 | if (map->type == _DRM_FRAME_BUFFER || |
175 | (map->flags & _DRM_WRITE_COMBINING)) { | |
176 | map->mtrr = mtrr_add(map->offset, map->size, | |
177 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
178 | } |
179 | } | |
0769d39c | 180 | if (map->type == _DRM_REGISTERS) { |
004a7727 | 181 | map->handle = ioremap(map->offset, map->size); |
0769d39c ST |
182 | if (!map->handle) { |
183 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
184 | return -ENOMEM; | |
185 | } | |
186 | } | |
187 | ||
1da177e4 | 188 | break; |
1da177e4 | 189 | case _DRM_SHM: |
54ba2f76 DA |
190 | list = drm_find_matching_map(dev, map); |
191 | if (list != NULL) { | |
192 | if(list->map->size != map->size) { | |
193 | DRM_DEBUG("Matching maps of type %d with " | |
194 | "mismatched sizes, (%ld vs %ld)\n", | |
195 | map->type, map->size, list->map->size); | |
196 | list->map->size = map->size; | |
197 | } | |
198 | ||
199 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
200 | *maplist = list; | |
201 | return 0; | |
202 | } | |
f239b7b0 | 203 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
204 | DRM_DEBUG("%lu %d %p\n", |
205 | map->size, drm_order(map->size), map->handle); | |
206 | if (!map->handle) { | |
207 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
208 | return -ENOMEM; |
209 | } | |
210 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 211 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 LT |
212 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
213 | if (dev->lock.hw_lock != NULL) { | |
b5e89ed5 DA |
214 | vfree(map->handle); |
215 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
216 | return -EBUSY; |
217 | } | |
b5e89ed5 | 218 | dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
219 | } |
220 | break; | |
54ba2f76 | 221 | case _DRM_AGP: { |
55910517 | 222 | struct drm_agp_mem *entry; |
54ba2f76 DA |
223 | int valid = 0; |
224 | ||
225 | if (!drm_core_has_AGP(dev)) { | |
226 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
227 | return -EINVAL; | |
228 | } | |
1da177e4 | 229 | #ifdef __alpha__ |
54ba2f76 | 230 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 231 | #endif |
54ba2f76 DA |
232 | /* Note: dev->agp->base may actually be 0 when the DRM |
233 | * is not in control of AGP space. But if user space is | |
234 | * it should already have added the AGP base itself. | |
235 | */ | |
236 | map->offset += dev->agp->base; | |
237 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ | |
238 | ||
239 | /* This assumes the DRM is in total control of AGP space. | |
240 | * It's not always the case as AGP can be in the control | |
241 | * of user space (i.e. i810 driver). So this loop will get | |
242 | * skipped and we double check that dev->agp->memory is | |
243 | * actually set as well as being invalid before EPERM'ing | |
244 | */ | |
bd1b331f | 245 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
246 | if ((map->offset >= entry->bound) && |
247 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
248 | valid = 1; | |
249 | break; | |
250 | } | |
1da177e4 | 251 | } |
bd1b331f | 252 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
253 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
254 | return -EPERM; | |
255 | } | |
256 | DRM_DEBUG("AGP offset = 0x%08lx, size = 0x%08lx\n", map->offset, map->size); | |
257 | ||
1da177e4 | 258 | break; |
54ba2f76 | 259 | } |
1da177e4 LT |
260 | case _DRM_SCATTER_GATHER: |
261 | if (!dev->sg) { | |
262 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
263 | return -EINVAL; | |
264 | } | |
d1f2b55a | 265 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 266 | break; |
b5e89ed5 | 267 | case _DRM_CONSISTENT: |
2d0f9eaf | 268 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 269 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
270 | * casting it down to 32 bits is no problem, but we |
271 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
272 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
273 | if (!dmah) { | |
2d0f9eaf DA |
274 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
275 | return -ENOMEM; | |
276 | } | |
9c8da5eb DA |
277 | map->handle = dmah->vaddr; |
278 | map->offset = (unsigned long)dmah->busaddr; | |
279 | kfree(dmah); | |
2d0f9eaf | 280 | break; |
1da177e4 | 281 | default: |
b5e89ed5 | 282 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
283 | return -EINVAL; |
284 | } | |
285 | ||
286 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); | |
b5e89ed5 | 287 | if (!list) { |
85abb3f9 | 288 | if (map->type == _DRM_REGISTERS) |
004a7727 | 289 | iounmap(map->handle); |
1da177e4 LT |
290 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
291 | return -EINVAL; | |
292 | } | |
293 | memset(list, 0, sizeof(*list)); | |
294 | list->map = map; | |
295 | ||
30e2fb18 | 296 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 297 | list_add(&list->head, &dev->maplist); |
8d153f71 | 298 | |
d1f2b55a | 299 | /* Assign a 32-bit handle */ |
30e2fb18 | 300 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
301 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
302 | map->offset; | |
a1d0fcf5 | 303 | ret = drm_map_handle(dev, &list->hash, user_token, 0); |
8d153f71 | 304 | if (ret) { |
85abb3f9 | 305 | if (map->type == _DRM_REGISTERS) |
004a7727 | 306 | iounmap(map->handle); |
8d153f71 TH |
307 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
308 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); | |
309 | mutex_unlock(&dev->struct_mutex); | |
310 | return ret; | |
311 | } | |
312 | ||
1545085a | 313 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 314 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 315 | |
89625eb1 | 316 | *maplist = list; |
7ab98401 | 317 | return 0; |
54ba2f76 | 318 | } |
89625eb1 | 319 | |
84b1fd10 | 320 | int drm_addmap(struct drm_device * dev, unsigned int offset, |
c60ce623 DA |
321 | unsigned int size, enum drm_map_type type, |
322 | enum drm_map_flags flags, drm_local_map_t ** map_ptr) | |
89625eb1 | 323 | { |
55910517 | 324 | struct drm_map_list *list; |
89625eb1 DA |
325 | int rc; |
326 | ||
327 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
328 | if (!rc) | |
329 | *map_ptr = list->map; | |
330 | return rc; | |
331 | } | |
b5e89ed5 | 332 | |
7ab98401 DA |
333 | EXPORT_SYMBOL(drm_addmap); |
334 | ||
335 | int drm_addmap_ioctl(struct inode *inode, struct file *filp, | |
336 | unsigned int cmd, unsigned long arg) | |
337 | { | |
84b1fd10 DA |
338 | struct drm_file *priv = filp->private_data; |
339 | struct drm_device *dev = priv->head->dev; | |
c60ce623 | 340 | struct drm_map map; |
55910517 | 341 | struct drm_map_list *maplist; |
c60ce623 | 342 | struct drm_map __user *argp = (void __user *)arg; |
7ab98401 DA |
343 | int err; |
344 | ||
345 | if (!(filp->f_mode & 3)) | |
346 | return -EACCES; /* Require read/write */ | |
347 | ||
b5e89ed5 | 348 | if (copy_from_user(&map, argp, sizeof(map))) { |
1da177e4 | 349 | return -EFAULT; |
7ab98401 DA |
350 | } |
351 | ||
d985c108 DA |
352 | if (!(capable(CAP_SYS_ADMIN) || map.type == _DRM_AGP)) |
353 | return -EPERM; | |
354 | ||
89625eb1 DA |
355 | err = drm_addmap_core(dev, map.offset, map.size, map.type, map.flags, |
356 | &maplist); | |
7ab98401 | 357 | |
b5e89ed5 | 358 | if (err) |
7ab98401 | 359 | return err; |
d1f2b55a | 360 | |
c60ce623 | 361 | if (copy_to_user(argp, maplist->map, sizeof(struct drm_map))) |
d1f2b55a | 362 | return -EFAULT; |
67e1a014 DA |
363 | |
364 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ | |
365 | if (put_user((void *)(unsigned long)maplist->user_token, &argp->handle)) | |
d1f2b55a | 366 | return -EFAULT; |
1da177e4 | 367 | return 0; |
88f399cd | 368 | } |
1da177e4 | 369 | |
1da177e4 LT |
370 | /** |
371 | * Remove a map private from list and deallocate resources if the mapping | |
372 | * isn't in use. | |
373 | * | |
374 | * \param inode device inode. | |
375 | * \param filp file pointer. | |
376 | * \param cmd command. | |
c60ce623 | 377 | * \param arg pointer to a struct drm_map structure. |
1da177e4 LT |
378 | * \return zero on success or a negative value on error. |
379 | * | |
380 | * Searches the map on drm_device::maplist, removes it from the list, see if | |
381 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
382 | * being on use. | |
383 | * | |
7ab98401 | 384 | * \sa drm_addmap |
1da177e4 | 385 | */ |
84b1fd10 | 386 | int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map) |
1da177e4 | 387 | { |
55910517 | 388 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 389 | drm_dma_handle_t dmah; |
bd1b331f | 390 | int found = 0; |
1da177e4 | 391 | |
836cf046 | 392 | /* Find the list entry for the map and remove it */ |
bd1b331f | 393 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 394 | if (r_list->map == map) { |
bd1b331f | 395 | list_del(&r_list->head); |
1545085a TH |
396 | drm_ht_remove_key(&dev->map_hash, |
397 | r_list->user_token >> PAGE_SHIFT); | |
bd1b331f DA |
398 | drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS); |
399 | found = 1; | |
836cf046 DA |
400 | break; |
401 | } | |
1da177e4 LT |
402 | } |
403 | ||
bd1b331f | 404 | if (!found) |
1da177e4 | 405 | return -EINVAL; |
1da177e4 | 406 | |
836cf046 DA |
407 | switch (map->type) { |
408 | case _DRM_REGISTERS: | |
004a7727 | 409 | iounmap(map->handle); |
836cf046 DA |
410 | /* FALLTHROUGH */ |
411 | case _DRM_FRAME_BUFFER: | |
412 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
413 | int retcode; | |
b5e89ed5 DA |
414 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
415 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 416 | } |
836cf046 DA |
417 | break; |
418 | case _DRM_SHM: | |
419 | vfree(map->handle); | |
420 | break; | |
421 | case _DRM_AGP: | |
422 | case _DRM_SCATTER_GATHER: | |
423 | break; | |
424 | case _DRM_CONSISTENT: | |
425 | dmah.vaddr = map->handle; | |
426 | dmah.busaddr = map->offset; | |
427 | dmah.size = map->size; | |
428 | __drm_pci_free(dev, &dmah); | |
429 | break; | |
1da177e4 | 430 | } |
836cf046 DA |
431 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
432 | ||
1da177e4 LT |
433 | return 0; |
434 | } | |
836cf046 | 435 | |
84b1fd10 | 436 | int drm_rmmap(struct drm_device *dev, drm_local_map_t *map) |
836cf046 DA |
437 | { |
438 | int ret; | |
439 | ||
30e2fb18 | 440 | mutex_lock(&dev->struct_mutex); |
836cf046 | 441 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 442 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
443 | |
444 | return ret; | |
445 | } | |
7ab98401 | 446 | |
836cf046 DA |
447 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
448 | * the last close of the device, and this is necessary for cleanup when things | |
449 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
450 | * like a pointless exercise since they're going away anyway. | |
451 | * | |
452 | * One use case might be after addmap is allowed for normal users for SHM and | |
453 | * gets used by drivers that the server doesn't need to care about. This seems | |
454 | * unlikely. | |
455 | */ | |
7ab98401 DA |
456 | int drm_rmmap_ioctl(struct inode *inode, struct file *filp, |
457 | unsigned int cmd, unsigned long arg) | |
458 | { | |
84b1fd10 DA |
459 | struct drm_file *priv = filp->private_data; |
460 | struct drm_device *dev = priv->head->dev; | |
c60ce623 | 461 | struct drm_map request; |
836cf046 | 462 | drm_local_map_t *map = NULL; |
55910517 | 463 | struct drm_map_list *r_list; |
836cf046 | 464 | int ret; |
7ab98401 | 465 | |
c60ce623 | 466 | if (copy_from_user(&request, (struct drm_map __user *) arg, sizeof(request))) { |
7ab98401 DA |
467 | return -EFAULT; |
468 | } | |
469 | ||
30e2fb18 | 470 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 471 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 472 | if (r_list->map && |
b5e89ed5 | 473 | r_list->user_token == (unsigned long)request.handle && |
836cf046 DA |
474 | r_list->map->flags & _DRM_REMOVABLE) { |
475 | map = r_list->map; | |
476 | break; | |
477 | } | |
478 | } | |
479 | ||
480 | /* List has wrapped around to the head pointer, or its empty we didn't | |
481 | * find anything. | |
482 | */ | |
bd1b331f | 483 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 484 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
485 | return -EINVAL; |
486 | } | |
487 | ||
836cf046 DA |
488 | /* Register and framebuffer maps are permanent */ |
489 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 490 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
491 | return 0; |
492 | } | |
493 | ||
494 | ret = drm_rmmap_locked(dev, map); | |
495 | ||
30e2fb18 | 496 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
497 | |
498 | return ret; | |
7ab98401 | 499 | } |
1da177e4 LT |
500 | |
501 | /** | |
502 | * Cleanup after an error on one of the addbufs() functions. | |
503 | * | |
836cf046 | 504 | * \param dev DRM device. |
1da177e4 LT |
505 | * \param entry buffer entry where the error occurred. |
506 | * | |
507 | * Frees any pages and buffers associated with the given entry. | |
508 | */ | |
cdd55a29 DA |
509 | static void drm_cleanup_buf_error(struct drm_device * dev, |
510 | struct drm_buf_entry * entry) | |
1da177e4 LT |
511 | { |
512 | int i; | |
513 | ||
514 | if (entry->seg_count) { | |
515 | for (i = 0; i < entry->seg_count; i++) { | |
516 | if (entry->seglist[i]) { | |
ddf19b97 | 517 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
518 | } |
519 | } | |
520 | drm_free(entry->seglist, | |
b5e89ed5 DA |
521 | entry->seg_count * |
522 | sizeof(*entry->seglist), DRM_MEM_SEGS); | |
1da177e4 LT |
523 | |
524 | entry->seg_count = 0; | |
525 | } | |
526 | ||
b5e89ed5 DA |
527 | if (entry->buf_count) { |
528 | for (i = 0; i < entry->buf_count; i++) { | |
1da177e4 LT |
529 | if (entry->buflist[i].dev_private) { |
530 | drm_free(entry->buflist[i].dev_private, | |
b5e89ed5 DA |
531 | entry->buflist[i].dev_priv_size, |
532 | DRM_MEM_BUFS); | |
1da177e4 LT |
533 | } |
534 | } | |
535 | drm_free(entry->buflist, | |
b5e89ed5 DA |
536 | entry->buf_count * |
537 | sizeof(*entry->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
538 | |
539 | entry->buf_count = 0; | |
540 | } | |
541 | } | |
542 | ||
543 | #if __OS_HAS_AGP | |
544 | /** | |
d59431bf | 545 | * Add AGP buffers for DMA transfers. |
1da177e4 | 546 | * |
84b1fd10 | 547 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 548 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 549 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 550 | * |
1da177e4 LT |
551 | * After some sanity checks creates a drm_buf structure for each buffer and |
552 | * reallocates the buffer list of the same size order to accommodate the new | |
553 | * buffers. | |
554 | */ | |
84b1fd10 | 555 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 556 | { |
cdd55a29 DA |
557 | struct drm_device_dma *dma = dev->dma; |
558 | struct drm_buf_entry *entry; | |
55910517 | 559 | struct drm_agp_mem *agp_entry; |
056219e2 | 560 | struct drm_buf *buf; |
1da177e4 LT |
561 | unsigned long offset; |
562 | unsigned long agp_offset; | |
563 | int count; | |
564 | int order; | |
565 | int size; | |
566 | int alignment; | |
567 | int page_order; | |
568 | int total; | |
569 | int byte_count; | |
54ba2f76 | 570 | int i, valid; |
056219e2 | 571 | struct drm_buf **temp_buflist; |
1da177e4 | 572 | |
b5e89ed5 DA |
573 | if (!dma) |
574 | return -EINVAL; | |
1da177e4 | 575 | |
d59431bf DA |
576 | count = request->count; |
577 | order = drm_order(request->size); | |
1da177e4 LT |
578 | size = 1 << order; |
579 | ||
b5e89ed5 DA |
580 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
581 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
582 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
583 | total = PAGE_SIZE << page_order; | |
584 | ||
585 | byte_count = 0; | |
d59431bf | 586 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 587 | |
b5e89ed5 DA |
588 | DRM_DEBUG("count: %d\n", count); |
589 | DRM_DEBUG("order: %d\n", order); | |
590 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 591 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
592 | DRM_DEBUG("alignment: %d\n", alignment); |
593 | DRM_DEBUG("page_order: %d\n", page_order); | |
594 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 595 | |
b5e89ed5 DA |
596 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
597 | return -EINVAL; | |
598 | if (dev->queue_count) | |
599 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 600 | |
54ba2f76 DA |
601 | /* Make sure buffers are located in AGP memory that we own */ |
602 | valid = 0; | |
bd1b331f | 603 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
604 | if ((agp_offset >= agp_entry->bound) && |
605 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
606 | valid = 1; | |
607 | break; | |
608 | } | |
609 | } | |
bd1b331f | 610 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
611 | DRM_DEBUG("zone invalid\n"); |
612 | return -EINVAL; | |
613 | } | |
b5e89ed5 DA |
614 | spin_lock(&dev->count_lock); |
615 | if (dev->buf_use) { | |
616 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
617 | return -EBUSY; |
618 | } | |
b5e89ed5 DA |
619 | atomic_inc(&dev->buf_alloc); |
620 | spin_unlock(&dev->count_lock); | |
1da177e4 | 621 | |
30e2fb18 | 622 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 623 | entry = &dma->bufs[order]; |
b5e89ed5 | 624 | if (entry->buf_count) { |
30e2fb18 | 625 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
626 | atomic_dec(&dev->buf_alloc); |
627 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
628 | } |
629 | ||
630 | if (count < 0 || count > 4096) { | |
30e2fb18 | 631 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 632 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
633 | return -EINVAL; |
634 | } | |
635 | ||
b5e89ed5 DA |
636 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
637 | DRM_MEM_BUFS); | |
638 | if (!entry->buflist) { | |
30e2fb18 | 639 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 640 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
641 | return -ENOMEM; |
642 | } | |
b5e89ed5 | 643 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
644 | |
645 | entry->buf_size = size; | |
646 | entry->page_order = page_order; | |
647 | ||
648 | offset = 0; | |
649 | ||
b5e89ed5 DA |
650 | while (entry->buf_count < count) { |
651 | buf = &entry->buflist[entry->buf_count]; | |
652 | buf->idx = dma->buf_count + entry->buf_count; | |
653 | buf->total = alignment; | |
654 | buf->order = order; | |
655 | buf->used = 0; | |
1da177e4 | 656 | |
b5e89ed5 | 657 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
658 | buf->bus_address = agp_offset + offset; |
659 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 660 | buf->next = NULL; |
1da177e4 LT |
661 | buf->waiting = 0; |
662 | buf->pending = 0; | |
b5e89ed5 DA |
663 | init_waitqueue_head(&buf->dma_wait); |
664 | buf->filp = NULL; | |
1da177e4 LT |
665 | |
666 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
667 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
668 | if (!buf->dev_private) { | |
1da177e4 LT |
669 | /* Set count correctly so we free the proper amount. */ |
670 | entry->buf_count = count; | |
b5e89ed5 | 671 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 672 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 673 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
674 | return -ENOMEM; |
675 | } | |
b5e89ed5 | 676 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 677 | |
b5e89ed5 | 678 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
679 | |
680 | offset += alignment; | |
681 | entry->buf_count++; | |
682 | byte_count += PAGE_SIZE << page_order; | |
683 | } | |
684 | ||
b5e89ed5 | 685 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 686 | |
b5e89ed5 DA |
687 | temp_buflist = drm_realloc(dma->buflist, |
688 | dma->buf_count * sizeof(*dma->buflist), | |
689 | (dma->buf_count + entry->buf_count) | |
690 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
691 | if (!temp_buflist) { | |
1da177e4 | 692 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 693 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 694 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 695 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
696 | return -ENOMEM; |
697 | } | |
698 | dma->buflist = temp_buflist; | |
699 | ||
b5e89ed5 | 700 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
701 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
702 | } | |
703 | ||
704 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
705 | dma->seg_count += entry->seg_count; |
706 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
707 | dma->byte_count += byte_count; |
708 | ||
b5e89ed5 DA |
709 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
710 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 711 | |
30e2fb18 | 712 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 713 | |
d59431bf DA |
714 | request->count = entry->buf_count; |
715 | request->size = size; | |
1da177e4 LT |
716 | |
717 | dma->flags = _DRM_DMA_USE_AGP; | |
718 | ||
b5e89ed5 | 719 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
720 | return 0; |
721 | } | |
d84f76d3 | 722 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 723 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 724 | |
84b1fd10 | 725 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 726 | { |
cdd55a29 | 727 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
728 | int count; |
729 | int order; | |
730 | int size; | |
731 | int total; | |
732 | int page_order; | |
cdd55a29 | 733 | struct drm_buf_entry *entry; |
ddf19b97 | 734 | drm_dma_handle_t *dmah; |
056219e2 | 735 | struct drm_buf *buf; |
1da177e4 LT |
736 | int alignment; |
737 | unsigned long offset; | |
738 | int i; | |
739 | int byte_count; | |
740 | int page_count; | |
741 | unsigned long *temp_pagelist; | |
056219e2 | 742 | struct drm_buf **temp_buflist; |
1da177e4 | 743 | |
b5e89ed5 DA |
744 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
745 | return -EINVAL; | |
d985c108 | 746 | |
b5e89ed5 DA |
747 | if (!dma) |
748 | return -EINVAL; | |
1da177e4 | 749 | |
d985c108 DA |
750 | if (!capable(CAP_SYS_ADMIN)) |
751 | return -EPERM; | |
752 | ||
d59431bf DA |
753 | count = request->count; |
754 | order = drm_order(request->size); | |
1da177e4 LT |
755 | size = 1 << order; |
756 | ||
b5e89ed5 DA |
757 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
758 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 759 | |
b5e89ed5 DA |
760 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
761 | return -EINVAL; | |
762 | if (dev->queue_count) | |
763 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 764 | |
d59431bf | 765 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 766 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
767 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
768 | total = PAGE_SIZE << page_order; | |
769 | ||
b5e89ed5 DA |
770 | spin_lock(&dev->count_lock); |
771 | if (dev->buf_use) { | |
772 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
773 | return -EBUSY; |
774 | } | |
b5e89ed5 DA |
775 | atomic_inc(&dev->buf_alloc); |
776 | spin_unlock(&dev->count_lock); | |
1da177e4 | 777 | |
30e2fb18 | 778 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 779 | entry = &dma->bufs[order]; |
b5e89ed5 | 780 | if (entry->buf_count) { |
30e2fb18 | 781 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 782 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
783 | return -ENOMEM; /* May only call once for each order */ |
784 | } | |
785 | ||
786 | if (count < 0 || count > 4096) { | |
30e2fb18 | 787 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 788 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
789 | return -EINVAL; |
790 | } | |
791 | ||
b5e89ed5 DA |
792 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
793 | DRM_MEM_BUFS); | |
794 | if (!entry->buflist) { | |
30e2fb18 | 795 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 796 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
797 | return -ENOMEM; |
798 | } | |
b5e89ed5 DA |
799 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
800 | ||
801 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), | |
802 | DRM_MEM_SEGS); | |
803 | if (!entry->seglist) { | |
804 | drm_free(entry->buflist, | |
805 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
30e2fb18 | 806 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 807 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
808 | return -ENOMEM; |
809 | } | |
b5e89ed5 | 810 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
811 | |
812 | /* Keep the original pagelist until we know all the allocations | |
813 | * have succeeded | |
814 | */ | |
b5e89ed5 DA |
815 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
816 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
1da177e4 | 817 | if (!temp_pagelist) { |
b5e89ed5 DA |
818 | drm_free(entry->buflist, |
819 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
820 | drm_free(entry->seglist, | |
821 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); | |
30e2fb18 | 822 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 823 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
824 | return -ENOMEM; |
825 | } | |
826 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
827 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
828 | DRM_DEBUG("pagelist: %d entries\n", | |
829 | dma->page_count + (count << page_order)); | |
1da177e4 | 830 | |
b5e89ed5 | 831 | entry->buf_size = size; |
1da177e4 LT |
832 | entry->page_order = page_order; |
833 | byte_count = 0; | |
834 | page_count = 0; | |
835 | ||
b5e89ed5 | 836 | while (entry->buf_count < count) { |
ddf19b97 DA |
837 | |
838 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); | |
839 | ||
840 | if (!dmah) { | |
1da177e4 LT |
841 | /* Set count correctly so we free the proper amount. */ |
842 | entry->buf_count = count; | |
843 | entry->seg_count = count; | |
844 | drm_cleanup_buf_error(dev, entry); | |
b5e89ed5 DA |
845 | drm_free(temp_pagelist, |
846 | (dma->page_count + (count << page_order)) | |
847 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 848 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 849 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
850 | return -ENOMEM; |
851 | } | |
ddf19b97 | 852 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
853 | for (i = 0; i < (1 << page_order); i++) { |
854 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
855 | dma->page_count + page_count, | |
ddf19b97 | 856 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 857 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 858 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 859 | } |
b5e89ed5 DA |
860 | for (offset = 0; |
861 | offset + size <= total && entry->buf_count < count; | |
862 | offset += alignment, ++entry->buf_count) { | |
863 | buf = &entry->buflist[entry->buf_count]; | |
864 | buf->idx = dma->buf_count + entry->buf_count; | |
865 | buf->total = alignment; | |
866 | buf->order = order; | |
867 | buf->used = 0; | |
868 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
869 | buf->address = (void *)(dmah->vaddr + offset); |
870 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 871 | buf->next = NULL; |
1da177e4 LT |
872 | buf->waiting = 0; |
873 | buf->pending = 0; | |
b5e89ed5 DA |
874 | init_waitqueue_head(&buf->dma_wait); |
875 | buf->filp = NULL; | |
1da177e4 LT |
876 | |
877 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
878 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
879 | DRM_MEM_BUFS); | |
880 | if (!buf->dev_private) { | |
1da177e4 LT |
881 | /* Set count correctly so we free the proper amount. */ |
882 | entry->buf_count = count; | |
883 | entry->seg_count = count; | |
b5e89ed5 DA |
884 | drm_cleanup_buf_error(dev, entry); |
885 | drm_free(temp_pagelist, | |
886 | (dma->page_count + | |
887 | (count << page_order)) | |
888 | * sizeof(*dma->pagelist), | |
889 | DRM_MEM_PAGES); | |
30e2fb18 | 890 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 891 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
892 | return -ENOMEM; |
893 | } | |
b5e89ed5 | 894 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 895 | |
b5e89ed5 DA |
896 | DRM_DEBUG("buffer %d @ %p\n", |
897 | entry->buf_count, buf->address); | |
1da177e4 LT |
898 | } |
899 | byte_count += PAGE_SIZE << page_order; | |
900 | } | |
901 | ||
b5e89ed5 DA |
902 | temp_buflist = drm_realloc(dma->buflist, |
903 | dma->buf_count * sizeof(*dma->buflist), | |
904 | (dma->buf_count + entry->buf_count) | |
905 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
906 | if (!temp_buflist) { |
907 | /* Free the entry because it isn't valid */ | |
b5e89ed5 DA |
908 | drm_cleanup_buf_error(dev, entry); |
909 | drm_free(temp_pagelist, | |
910 | (dma->page_count + (count << page_order)) | |
911 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 912 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 913 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
914 | return -ENOMEM; |
915 | } | |
916 | dma->buflist = temp_buflist; | |
917 | ||
b5e89ed5 | 918 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
919 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
920 | } | |
921 | ||
922 | /* No allocations failed, so now we can replace the orginal pagelist | |
923 | * with the new one. | |
924 | */ | |
925 | if (dma->page_count) { | |
926 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
927 | dma->page_count * sizeof(*dma->pagelist), |
928 | DRM_MEM_PAGES); | |
1da177e4 LT |
929 | } |
930 | dma->pagelist = temp_pagelist; | |
931 | ||
932 | dma->buf_count += entry->buf_count; | |
933 | dma->seg_count += entry->seg_count; | |
934 | dma->page_count += entry->seg_count << page_order; | |
935 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
936 | ||
30e2fb18 | 937 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 938 | |
d59431bf DA |
939 | request->count = entry->buf_count; |
940 | request->size = size; | |
1da177e4 | 941 | |
3417f33e GS |
942 | if (request->flags & _DRM_PCI_BUFFER_RO) |
943 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
944 | ||
b5e89ed5 | 945 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
946 | return 0; |
947 | ||
948 | } | |
d84f76d3 | 949 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 950 | |
84b1fd10 | 951 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 952 | { |
cdd55a29 DA |
953 | struct drm_device_dma *dma = dev->dma; |
954 | struct drm_buf_entry *entry; | |
056219e2 | 955 | struct drm_buf *buf; |
1da177e4 LT |
956 | unsigned long offset; |
957 | unsigned long agp_offset; | |
958 | int count; | |
959 | int order; | |
960 | int size; | |
961 | int alignment; | |
962 | int page_order; | |
963 | int total; | |
964 | int byte_count; | |
965 | int i; | |
056219e2 | 966 | struct drm_buf **temp_buflist; |
1da177e4 | 967 | |
b5e89ed5 DA |
968 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
969 | return -EINVAL; | |
970 | ||
971 | if (!dma) | |
972 | return -EINVAL; | |
1da177e4 | 973 | |
d985c108 DA |
974 | if (!capable(CAP_SYS_ADMIN)) |
975 | return -EPERM; | |
976 | ||
d59431bf DA |
977 | count = request->count; |
978 | order = drm_order(request->size); | |
1da177e4 LT |
979 | size = 1 << order; |
980 | ||
b5e89ed5 DA |
981 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
982 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
983 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
984 | total = PAGE_SIZE << page_order; | |
985 | ||
986 | byte_count = 0; | |
d59431bf | 987 | agp_offset = request->agp_start; |
1da177e4 | 988 | |
b5e89ed5 DA |
989 | DRM_DEBUG("count: %d\n", count); |
990 | DRM_DEBUG("order: %d\n", order); | |
991 | DRM_DEBUG("size: %d\n", size); | |
992 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
993 | DRM_DEBUG("alignment: %d\n", alignment); | |
994 | DRM_DEBUG("page_order: %d\n", page_order); | |
995 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 996 | |
b5e89ed5 DA |
997 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
998 | return -EINVAL; | |
999 | if (dev->queue_count) | |
1000 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1001 | |
b5e89ed5 DA |
1002 | spin_lock(&dev->count_lock); |
1003 | if (dev->buf_use) { | |
1004 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1005 | return -EBUSY; |
1006 | } | |
b5e89ed5 DA |
1007 | atomic_inc(&dev->buf_alloc); |
1008 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1009 | |
30e2fb18 | 1010 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1011 | entry = &dma->bufs[order]; |
b5e89ed5 | 1012 | if (entry->buf_count) { |
30e2fb18 | 1013 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1014 | atomic_dec(&dev->buf_alloc); |
1015 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1016 | } |
1017 | ||
1018 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1019 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1020 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1021 | return -EINVAL; |
1022 | } | |
1023 | ||
b5e89ed5 DA |
1024 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
1025 | DRM_MEM_BUFS); | |
1026 | if (!entry->buflist) { | |
30e2fb18 | 1027 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1028 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1029 | return -ENOMEM; |
1030 | } | |
b5e89ed5 | 1031 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
1032 | |
1033 | entry->buf_size = size; | |
1034 | entry->page_order = page_order; | |
1035 | ||
1036 | offset = 0; | |
1037 | ||
b5e89ed5 DA |
1038 | while (entry->buf_count < count) { |
1039 | buf = &entry->buflist[entry->buf_count]; | |
1040 | buf->idx = dma->buf_count + entry->buf_count; | |
1041 | buf->total = alignment; | |
1042 | buf->order = order; | |
1043 | buf->used = 0; | |
1da177e4 | 1044 | |
b5e89ed5 | 1045 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1046 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1047 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1048 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1049 | buf->next = NULL; |
1da177e4 LT |
1050 | buf->waiting = 0; |
1051 | buf->pending = 0; | |
b5e89ed5 DA |
1052 | init_waitqueue_head(&buf->dma_wait); |
1053 | buf->filp = NULL; | |
1da177e4 LT |
1054 | |
1055 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
1056 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
1057 | if (!buf->dev_private) { | |
1da177e4 LT |
1058 | /* Set count correctly so we free the proper amount. */ |
1059 | entry->buf_count = count; | |
b5e89ed5 | 1060 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1061 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1062 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1063 | return -ENOMEM; |
1064 | } | |
1065 | ||
b5e89ed5 | 1066 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1067 | |
b5e89ed5 | 1068 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1069 | |
1070 | offset += alignment; | |
1071 | entry->buf_count++; | |
1072 | byte_count += PAGE_SIZE << page_order; | |
1073 | } | |
1074 | ||
b5e89ed5 | 1075 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1076 | |
b5e89ed5 DA |
1077 | temp_buflist = drm_realloc(dma->buflist, |
1078 | dma->buf_count * sizeof(*dma->buflist), | |
1079 | (dma->buf_count + entry->buf_count) | |
1080 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1081 | if (!temp_buflist) { | |
1da177e4 | 1082 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1083 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1084 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1085 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1086 | return -ENOMEM; |
1087 | } | |
1088 | dma->buflist = temp_buflist; | |
1089 | ||
b5e89ed5 | 1090 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1091 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1092 | } | |
1093 | ||
1094 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1095 | dma->seg_count += entry->seg_count; |
1096 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1097 | dma->byte_count += byte_count; |
1098 | ||
b5e89ed5 DA |
1099 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1100 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1101 | |
30e2fb18 | 1102 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1103 | |
d59431bf DA |
1104 | request->count = entry->buf_count; |
1105 | request->size = size; | |
1da177e4 LT |
1106 | |
1107 | dma->flags = _DRM_DMA_USE_SG; | |
1108 | ||
b5e89ed5 | 1109 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1110 | return 0; |
1111 | } | |
1112 | ||
84b1fd10 | 1113 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1114 | { |
cdd55a29 DA |
1115 | struct drm_device_dma *dma = dev->dma; |
1116 | struct drm_buf_entry *entry; | |
056219e2 | 1117 | struct drm_buf *buf; |
b84397d6 DA |
1118 | unsigned long offset; |
1119 | unsigned long agp_offset; | |
1120 | int count; | |
1121 | int order; | |
1122 | int size; | |
1123 | int alignment; | |
1124 | int page_order; | |
1125 | int total; | |
1126 | int byte_count; | |
1127 | int i; | |
056219e2 | 1128 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1129 | |
1130 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1131 | return -EINVAL; | |
b5e89ed5 | 1132 | |
b84397d6 DA |
1133 | if (!dma) |
1134 | return -EINVAL; | |
1135 | ||
d985c108 DA |
1136 | if (!capable(CAP_SYS_ADMIN)) |
1137 | return -EPERM; | |
1138 | ||
d59431bf DA |
1139 | count = request->count; |
1140 | order = drm_order(request->size); | |
b84397d6 DA |
1141 | size = 1 << order; |
1142 | ||
d59431bf | 1143 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1144 | ? PAGE_ALIGN(size) : size; |
1145 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1146 | total = PAGE_SIZE << page_order; | |
1147 | ||
1148 | byte_count = 0; | |
d59431bf | 1149 | agp_offset = request->agp_start; |
b84397d6 DA |
1150 | |
1151 | DRM_DEBUG("count: %d\n", count); | |
1152 | DRM_DEBUG("order: %d\n", order); | |
1153 | DRM_DEBUG("size: %d\n", size); | |
1154 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1155 | DRM_DEBUG("alignment: %d\n", alignment); | |
1156 | DRM_DEBUG("page_order: %d\n", page_order); | |
1157 | DRM_DEBUG("total: %d\n", total); | |
1158 | ||
1159 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1160 | return -EINVAL; | |
1161 | if (dev->queue_count) | |
1162 | return -EBUSY; /* Not while in use */ | |
1163 | ||
1164 | spin_lock(&dev->count_lock); | |
1165 | if (dev->buf_use) { | |
1166 | spin_unlock(&dev->count_lock); | |
1167 | return -EBUSY; | |
1168 | } | |
1169 | atomic_inc(&dev->buf_alloc); | |
1170 | spin_unlock(&dev->count_lock); | |
1171 | ||
30e2fb18 | 1172 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1173 | entry = &dma->bufs[order]; |
1174 | if (entry->buf_count) { | |
30e2fb18 | 1175 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1176 | atomic_dec(&dev->buf_alloc); |
1177 | return -ENOMEM; /* May only call once for each order */ | |
1178 | } | |
1179 | ||
1180 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1181 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1182 | atomic_dec(&dev->buf_alloc); |
1183 | return -EINVAL; | |
1184 | } | |
1185 | ||
1186 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), | |
1187 | DRM_MEM_BUFS); | |
1188 | if (!entry->buflist) { | |
30e2fb18 | 1189 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1190 | atomic_dec(&dev->buf_alloc); |
1191 | return -ENOMEM; | |
1192 | } | |
1193 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1194 | ||
1195 | entry->buf_size = size; | |
1196 | entry->page_order = page_order; | |
1197 | ||
1198 | offset = 0; | |
1199 | ||
1200 | while (entry->buf_count < count) { | |
1201 | buf = &entry->buflist[entry->buf_count]; | |
1202 | buf->idx = dma->buf_count + entry->buf_count; | |
1203 | buf->total = alignment; | |
1204 | buf->order = order; | |
1205 | buf->used = 0; | |
1206 | ||
1207 | buf->offset = (dma->byte_count + offset); | |
1208 | buf->bus_address = agp_offset + offset; | |
1209 | buf->address = (void *)(agp_offset + offset); | |
1210 | buf->next = NULL; | |
1211 | buf->waiting = 0; | |
1212 | buf->pending = 0; | |
1213 | init_waitqueue_head(&buf->dma_wait); | |
1214 | buf->filp = NULL; | |
1215 | ||
1216 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
1217 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); | |
1218 | if (!buf->dev_private) { | |
1219 | /* Set count correctly so we free the proper amount. */ | |
1220 | entry->buf_count = count; | |
1221 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1222 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1223 | atomic_dec(&dev->buf_alloc); |
1224 | return -ENOMEM; | |
1225 | } | |
1226 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1227 | ||
1228 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1229 | ||
1230 | offset += alignment; | |
1231 | entry->buf_count++; | |
1232 | byte_count += PAGE_SIZE << page_order; | |
1233 | } | |
1234 | ||
1235 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1236 | ||
1237 | temp_buflist = drm_realloc(dma->buflist, | |
1238 | dma->buf_count * sizeof(*dma->buflist), | |
1239 | (dma->buf_count + entry->buf_count) | |
1240 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1241 | if (!temp_buflist) { | |
1242 | /* Free the entry because it isn't valid */ | |
1243 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1244 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1245 | atomic_dec(&dev->buf_alloc); |
1246 | return -ENOMEM; | |
1247 | } | |
1248 | dma->buflist = temp_buflist; | |
1249 | ||
1250 | for (i = 0; i < entry->buf_count; i++) { | |
1251 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1252 | } | |
1253 | ||
1254 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1255 | dma->seg_count += entry->seg_count; |
1256 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1257 | dma->byte_count += byte_count; |
1258 | ||
1259 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1260 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1261 | ||
30e2fb18 | 1262 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1263 | |
d59431bf DA |
1264 | request->count = entry->buf_count; |
1265 | request->size = size; | |
b84397d6 DA |
1266 | |
1267 | dma->flags = _DRM_DMA_USE_FB; | |
1268 | ||
1269 | atomic_dec(&dev->buf_alloc); | |
1270 | return 0; | |
1271 | } | |
d985c108 | 1272 | |
b84397d6 | 1273 | |
1da177e4 LT |
1274 | /** |
1275 | * Add buffers for DMA transfers (ioctl). | |
1276 | * | |
1277 | * \param inode device inode. | |
1278 | * \param filp file pointer. | |
1279 | * \param cmd command. | |
c60ce623 | 1280 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1281 | * \return zero on success or a negative number on failure. |
1282 | * | |
1283 | * According with the memory type specified in drm_buf_desc::flags and the | |
1284 | * build options, it dispatches the call either to addbufs_agp(), | |
1285 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1286 | * PCI memory respectively. | |
1287 | */ | |
b5e89ed5 DA |
1288 | int drm_addbufs(struct inode *inode, struct file *filp, |
1289 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1290 | { |
c60ce623 | 1291 | struct drm_buf_desc request; |
84b1fd10 DA |
1292 | struct drm_file *priv = filp->private_data; |
1293 | struct drm_device *dev = priv->head->dev; | |
d59431bf | 1294 | int ret; |
b5e89ed5 | 1295 | |
1da177e4 LT |
1296 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1297 | return -EINVAL; | |
1298 | ||
c60ce623 | 1299 | if (copy_from_user(&request, (struct drm_buf_desc __user *) arg, |
b5e89ed5 | 1300 | sizeof(request))) |
1da177e4 LT |
1301 | return -EFAULT; |
1302 | ||
1303 | #if __OS_HAS_AGP | |
b5e89ed5 DA |
1304 | if (request.flags & _DRM_AGP_BUFFER) |
1305 | ret = drm_addbufs_agp(dev, &request); | |
1da177e4 LT |
1306 | else |
1307 | #endif | |
b5e89ed5 DA |
1308 | if (request.flags & _DRM_SG_BUFFER) |
1309 | ret = drm_addbufs_sg(dev, &request); | |
1310 | else if (request.flags & _DRM_FB_BUFFER) | |
1311 | ret = drm_addbufs_fb(dev, &request); | |
1da177e4 | 1312 | else |
b5e89ed5 | 1313 | ret = drm_addbufs_pci(dev, &request); |
d59431bf | 1314 | |
b5e89ed5 DA |
1315 | if (ret == 0) { |
1316 | if (copy_to_user((void __user *)arg, &request, sizeof(request))) { | |
d59431bf DA |
1317 | ret = -EFAULT; |
1318 | } | |
1319 | } | |
1320 | return ret; | |
1da177e4 LT |
1321 | } |
1322 | ||
1da177e4 LT |
1323 | /** |
1324 | * Get information about the buffer mappings. | |
1325 | * | |
1326 | * This was originally mean for debugging purposes, or by a sophisticated | |
1327 | * client library to determine how best to use the available buffers (e.g., | |
1328 | * large buffers can be used for image transfer). | |
1329 | * | |
1330 | * \param inode device inode. | |
1331 | * \param filp file pointer. | |
1332 | * \param cmd command. | |
1333 | * \param arg pointer to a drm_buf_info structure. | |
1334 | * \return zero on success or a negative number on failure. | |
1335 | * | |
1336 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1337 | * lock, preventing of allocating more buffers after this call. Information | |
1338 | * about each requested buffer is then copied into user space. | |
1339 | */ | |
b5e89ed5 DA |
1340 | int drm_infobufs(struct inode *inode, struct file *filp, |
1341 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1342 | { |
84b1fd10 DA |
1343 | struct drm_file *priv = filp->private_data; |
1344 | struct drm_device *dev = priv->head->dev; | |
cdd55a29 | 1345 | struct drm_device_dma *dma = dev->dma; |
c60ce623 DA |
1346 | struct drm_buf_info request; |
1347 | struct drm_buf_info __user *argp = (void __user *)arg; | |
1da177e4 LT |
1348 | int i; |
1349 | int count; | |
1350 | ||
1351 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1352 | return -EINVAL; | |
1353 | ||
b5e89ed5 DA |
1354 | if (!dma) |
1355 | return -EINVAL; | |
1da177e4 | 1356 | |
b5e89ed5 DA |
1357 | spin_lock(&dev->count_lock); |
1358 | if (atomic_read(&dev->buf_alloc)) { | |
1359 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1360 | return -EBUSY; |
1361 | } | |
1362 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1363 | spin_unlock(&dev->count_lock); |
1da177e4 | 1364 | |
b5e89ed5 | 1365 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1366 | return -EFAULT; |
1367 | ||
b5e89ed5 DA |
1368 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1369 | if (dma->bufs[i].buf_count) | |
1370 | ++count; | |
1da177e4 LT |
1371 | } |
1372 | ||
b5e89ed5 | 1373 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1374 | |
b5e89ed5 DA |
1375 | if (request.count >= count) { |
1376 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { | |
1377 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1378 | struct drm_buf_desc __user *to = |
b5e89ed5 | 1379 | &request.list[count]; |
cdd55a29 DA |
1380 | struct drm_buf_entry *from = &dma->bufs[i]; |
1381 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1382 | if (copy_to_user(&to->count, |
1383 | &from->buf_count, | |
1384 | sizeof(from->buf_count)) || | |
1385 | copy_to_user(&to->size, | |
1386 | &from->buf_size, | |
1387 | sizeof(from->buf_size)) || | |
1388 | copy_to_user(&to->low_mark, | |
1389 | &list->low_mark, | |
1390 | sizeof(list->low_mark)) || | |
1391 | copy_to_user(&to->high_mark, | |
1392 | &list->high_mark, | |
1393 | sizeof(list->high_mark))) | |
1da177e4 LT |
1394 | return -EFAULT; |
1395 | ||
b5e89ed5 DA |
1396 | DRM_DEBUG("%d %d %d %d %d\n", |
1397 | i, | |
1398 | dma->bufs[i].buf_count, | |
1399 | dma->bufs[i].buf_size, | |
1400 | dma->bufs[i].freelist.low_mark, | |
1401 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1402 | ++count; |
1403 | } | |
1404 | } | |
1405 | } | |
1406 | request.count = count; | |
1407 | ||
b5e89ed5 | 1408 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1409 | return -EFAULT; |
1410 | ||
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | /** | |
1415 | * Specifies a low and high water mark for buffer allocation | |
1416 | * | |
1417 | * \param inode device inode. | |
1418 | * \param filp file pointer. | |
1419 | * \param cmd command. | |
1420 | * \param arg a pointer to a drm_buf_desc structure. | |
1421 | * \return zero on success or a negative number on failure. | |
1422 | * | |
1423 | * Verifies that the size order is bounded between the admissible orders and | |
1424 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1425 | * | |
1426 | * \note This ioctl is deprecated and mostly never used. | |
1427 | */ | |
b5e89ed5 DA |
1428 | int drm_markbufs(struct inode *inode, struct file *filp, |
1429 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1430 | { |
84b1fd10 DA |
1431 | struct drm_file *priv = filp->private_data; |
1432 | struct drm_device *dev = priv->head->dev; | |
cdd55a29 | 1433 | struct drm_device_dma *dma = dev->dma; |
c60ce623 | 1434 | struct drm_buf_desc request; |
1da177e4 | 1435 | int order; |
cdd55a29 | 1436 | struct drm_buf_entry *entry; |
1da177e4 LT |
1437 | |
1438 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1439 | return -EINVAL; | |
1440 | ||
b5e89ed5 DA |
1441 | if (!dma) |
1442 | return -EINVAL; | |
1da177e4 | 1443 | |
b5e89ed5 | 1444 | if (copy_from_user(&request, |
c60ce623 | 1445 | (struct drm_buf_desc __user *) arg, sizeof(request))) |
1da177e4 LT |
1446 | return -EFAULT; |
1447 | ||
b5e89ed5 DA |
1448 | DRM_DEBUG("%d, %d, %d\n", |
1449 | request.size, request.low_mark, request.high_mark); | |
1450 | order = drm_order(request.size); | |
1451 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1452 | return -EINVAL; | |
1da177e4 LT |
1453 | entry = &dma->bufs[order]; |
1454 | ||
b5e89ed5 | 1455 | if (request.low_mark < 0 || request.low_mark > entry->buf_count) |
1da177e4 | 1456 | return -EINVAL; |
b5e89ed5 | 1457 | if (request.high_mark < 0 || request.high_mark > entry->buf_count) |
1da177e4 LT |
1458 | return -EINVAL; |
1459 | ||
b5e89ed5 | 1460 | entry->freelist.low_mark = request.low_mark; |
1da177e4 LT |
1461 | entry->freelist.high_mark = request.high_mark; |
1462 | ||
1463 | return 0; | |
1464 | } | |
1465 | ||
1466 | /** | |
b5e89ed5 | 1467 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1468 | * |
1469 | * \param inode device inode. | |
1470 | * \param filp file pointer. | |
1471 | * \param cmd command. | |
1472 | * \param arg pointer to a drm_buf_free structure. | |
1473 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1474 | * |
1da177e4 LT |
1475 | * Calls free_buffer() for each used buffer. |
1476 | * This function is primarily used for debugging. | |
1477 | */ | |
b5e89ed5 DA |
1478 | int drm_freebufs(struct inode *inode, struct file *filp, |
1479 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1480 | { |
84b1fd10 DA |
1481 | struct drm_file *priv = filp->private_data; |
1482 | struct drm_device *dev = priv->head->dev; | |
cdd55a29 | 1483 | struct drm_device_dma *dma = dev->dma; |
c60ce623 | 1484 | struct drm_buf_free request; |
1da177e4 LT |
1485 | int i; |
1486 | int idx; | |
056219e2 | 1487 | struct drm_buf *buf; |
1da177e4 LT |
1488 | |
1489 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1490 | return -EINVAL; | |
1491 | ||
b5e89ed5 DA |
1492 | if (!dma) |
1493 | return -EINVAL; | |
1da177e4 | 1494 | |
b5e89ed5 | 1495 | if (copy_from_user(&request, |
c60ce623 | 1496 | (struct drm_buf_free __user *) arg, sizeof(request))) |
1da177e4 LT |
1497 | return -EFAULT; |
1498 | ||
b5e89ed5 DA |
1499 | DRM_DEBUG("%d\n", request.count); |
1500 | for (i = 0; i < request.count; i++) { | |
1501 | if (copy_from_user(&idx, &request.list[i], sizeof(idx))) | |
1da177e4 | 1502 | return -EFAULT; |
b5e89ed5 DA |
1503 | if (idx < 0 || idx >= dma->buf_count) { |
1504 | DRM_ERROR("Index %d (of %d max)\n", | |
1505 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1506 | return -EINVAL; |
1507 | } | |
1508 | buf = dma->buflist[idx]; | |
b5e89ed5 DA |
1509 | if (buf->filp != filp) { |
1510 | DRM_ERROR("Process %d freeing buffer not owned\n", | |
1511 | current->pid); | |
1da177e4 LT |
1512 | return -EINVAL; |
1513 | } | |
b5e89ed5 | 1514 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1515 | } |
1516 | ||
1517 | return 0; | |
1518 | } | |
1519 | ||
1520 | /** | |
1521 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1522 | * | |
1523 | * \param inode device inode. | |
1524 | * \param filp file pointer. | |
1525 | * \param cmd command. | |
1526 | * \param arg pointer to a drm_buf_map structure. | |
1527 | * \return zero on success or a negative number on failure. | |
1528 | * | |
3417f33e GS |
1529 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1530 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1531 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1532 | * drm_mmap_dma(). | |
1da177e4 | 1533 | */ |
b5e89ed5 DA |
1534 | int drm_mapbufs(struct inode *inode, struct file *filp, |
1535 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1536 | { |
84b1fd10 DA |
1537 | struct drm_file *priv = filp->private_data; |
1538 | struct drm_device *dev = priv->head->dev; | |
cdd55a29 | 1539 | struct drm_device_dma *dma = dev->dma; |
c60ce623 | 1540 | struct drm_buf_map __user *argp = (void __user *)arg; |
1da177e4 LT |
1541 | int retcode = 0; |
1542 | const int zero = 0; | |
1543 | unsigned long virtual; | |
1544 | unsigned long address; | |
c60ce623 | 1545 | struct drm_buf_map request; |
1da177e4 LT |
1546 | int i; |
1547 | ||
1548 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1549 | return -EINVAL; | |
1550 | ||
b5e89ed5 DA |
1551 | if (!dma) |
1552 | return -EINVAL; | |
1da177e4 | 1553 | |
b5e89ed5 DA |
1554 | spin_lock(&dev->count_lock); |
1555 | if (atomic_read(&dev->buf_alloc)) { | |
1556 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1557 | return -EBUSY; |
1558 | } | |
1559 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1560 | spin_unlock(&dev->count_lock); |
1da177e4 | 1561 | |
b5e89ed5 | 1562 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1563 | return -EFAULT; |
1564 | ||
b5e89ed5 | 1565 | if (request.count >= dma->buf_count) { |
b84397d6 | 1566 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1567 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1568 | && (dma->flags & _DRM_DMA_USE_SG)) |
1569 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1570 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
c60ce623 | 1571 | struct drm_map *map = dev->agp_buffer_map; |
d1f2b55a | 1572 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1573 | |
b5e89ed5 | 1574 | if (!map) { |
1da177e4 LT |
1575 | retcode = -EINVAL; |
1576 | goto done; | |
1577 | } | |
1578 | ||
b5e89ed5 DA |
1579 | down_write(¤t->mm->mmap_sem); |
1580 | virtual = do_mmap(filp, 0, map->size, | |
1581 | PROT_READ | PROT_WRITE, | |
1582 | MAP_SHARED, token); | |
1583 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1584 | } else { |
b5e89ed5 DA |
1585 | down_write(¤t->mm->mmap_sem); |
1586 | virtual = do_mmap(filp, 0, dma->byte_count, | |
1587 | PROT_READ | PROT_WRITE, | |
1588 | MAP_SHARED, 0); | |
1589 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1590 | } |
b5e89ed5 | 1591 | if (virtual > -1024UL) { |
1da177e4 LT |
1592 | /* Real error */ |
1593 | retcode = (signed long)virtual; | |
1594 | goto done; | |
1595 | } | |
1596 | request.virtual = (void __user *)virtual; | |
1597 | ||
b5e89ed5 DA |
1598 | for (i = 0; i < dma->buf_count; i++) { |
1599 | if (copy_to_user(&request.list[i].idx, | |
1600 | &dma->buflist[i]->idx, | |
1601 | sizeof(request.list[0].idx))) { | |
1da177e4 LT |
1602 | retcode = -EFAULT; |
1603 | goto done; | |
1604 | } | |
b5e89ed5 DA |
1605 | if (copy_to_user(&request.list[i].total, |
1606 | &dma->buflist[i]->total, | |
1607 | sizeof(request.list[0].total))) { | |
1da177e4 LT |
1608 | retcode = -EFAULT; |
1609 | goto done; | |
1610 | } | |
b5e89ed5 DA |
1611 | if (copy_to_user(&request.list[i].used, |
1612 | &zero, sizeof(zero))) { | |
1da177e4 LT |
1613 | retcode = -EFAULT; |
1614 | goto done; | |
1615 | } | |
b5e89ed5 DA |
1616 | address = virtual + dma->buflist[i]->offset; /* *** */ |
1617 | if (copy_to_user(&request.list[i].address, | |
1618 | &address, sizeof(address))) { | |
1da177e4 LT |
1619 | retcode = -EFAULT; |
1620 | goto done; | |
1621 | } | |
1622 | } | |
1623 | } | |
b5e89ed5 | 1624 | done: |
1da177e4 | 1625 | request.count = dma->buf_count; |
b5e89ed5 | 1626 | DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode); |
1da177e4 | 1627 | |
b5e89ed5 | 1628 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1629 | return -EFAULT; |
1630 | ||
1631 | return retcode; | |
1632 | } | |
1633 | ||
836cf046 DA |
1634 | /** |
1635 | * Compute size order. Returns the exponent of the smaller power of two which | |
1636 | * is greater or equal to given number. | |
b5e89ed5 | 1637 | * |
836cf046 DA |
1638 | * \param size size. |
1639 | * \return order. | |
1640 | * | |
1641 | * \todo Can be made faster. | |
1642 | */ | |
b5e89ed5 | 1643 | int drm_order(unsigned long size) |
836cf046 DA |
1644 | { |
1645 | int order; | |
1646 | unsigned long tmp; | |
1647 | ||
b5e89ed5 | 1648 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1649 | |
1650 | if (size & (size - 1)) | |
1651 | ++order; | |
1652 | ||
1653 | return order; | |
1654 | } | |
1655 | EXPORT_SYMBOL(drm_order); | |
d985c108 DA |
1656 | |
1657 |