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> | |
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 | |
84b1fd10 | 67 | static int drm_map_handle(struct drm_device *dev, drm_hash_item_t *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 | } | |
180 | if (map->type == _DRM_REGISTERS) | |
004a7727 | 181 | map->handle = ioremap(map->offset, map->size); |
1da177e4 | 182 | break; |
1da177e4 | 183 | case _DRM_SHM: |
54ba2f76 DA |
184 | list = drm_find_matching_map(dev, map); |
185 | if (list != NULL) { | |
186 | if(list->map->size != map->size) { | |
187 | DRM_DEBUG("Matching maps of type %d with " | |
188 | "mismatched sizes, (%ld vs %ld)\n", | |
189 | map->type, map->size, list->map->size); | |
190 | list->map->size = map->size; | |
191 | } | |
192 | ||
193 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
194 | *maplist = list; | |
195 | return 0; | |
196 | } | |
f239b7b0 | 197 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
198 | DRM_DEBUG("%lu %d %p\n", |
199 | map->size, drm_order(map->size), map->handle); | |
200 | if (!map->handle) { | |
201 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
202 | return -ENOMEM; |
203 | } | |
204 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 205 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 LT |
206 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
207 | if (dev->lock.hw_lock != NULL) { | |
b5e89ed5 DA |
208 | vfree(map->handle); |
209 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
210 | return -EBUSY; |
211 | } | |
b5e89ed5 | 212 | dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
213 | } |
214 | break; | |
54ba2f76 | 215 | case _DRM_AGP: { |
55910517 | 216 | struct drm_agp_mem *entry; |
54ba2f76 DA |
217 | int valid = 0; |
218 | ||
219 | if (!drm_core_has_AGP(dev)) { | |
220 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
221 | return -EINVAL; | |
222 | } | |
1da177e4 | 223 | #ifdef __alpha__ |
54ba2f76 | 224 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 225 | #endif |
54ba2f76 DA |
226 | /* Note: dev->agp->base may actually be 0 when the DRM |
227 | * is not in control of AGP space. But if user space is | |
228 | * it should already have added the AGP base itself. | |
229 | */ | |
230 | map->offset += dev->agp->base; | |
231 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ | |
232 | ||
233 | /* This assumes the DRM is in total control of AGP space. | |
234 | * It's not always the case as AGP can be in the control | |
235 | * of user space (i.e. i810 driver). So this loop will get | |
236 | * skipped and we double check that dev->agp->memory is | |
237 | * actually set as well as being invalid before EPERM'ing | |
238 | */ | |
bd1b331f | 239 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
240 | if ((map->offset >= entry->bound) && |
241 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
242 | valid = 1; | |
243 | break; | |
244 | } | |
1da177e4 | 245 | } |
bd1b331f | 246 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
247 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
248 | return -EPERM; | |
249 | } | |
250 | DRM_DEBUG("AGP offset = 0x%08lx, size = 0x%08lx\n", map->offset, map->size); | |
251 | ||
1da177e4 | 252 | break; |
54ba2f76 | 253 | } |
1da177e4 LT |
254 | case _DRM_SCATTER_GATHER: |
255 | if (!dev->sg) { | |
256 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
257 | return -EINVAL; | |
258 | } | |
d1f2b55a | 259 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 260 | break; |
b5e89ed5 | 261 | case _DRM_CONSISTENT: |
2d0f9eaf | 262 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 263 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
264 | * casting it down to 32 bits is no problem, but we |
265 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
266 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
267 | if (!dmah) { | |
2d0f9eaf DA |
268 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
269 | return -ENOMEM; | |
270 | } | |
9c8da5eb DA |
271 | map->handle = dmah->vaddr; |
272 | map->offset = (unsigned long)dmah->busaddr; | |
273 | kfree(dmah); | |
2d0f9eaf | 274 | break; |
1da177e4 | 275 | default: |
b5e89ed5 | 276 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
277 | return -EINVAL; |
278 | } | |
279 | ||
280 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); | |
b5e89ed5 | 281 | if (!list) { |
85abb3f9 | 282 | if (map->type == _DRM_REGISTERS) |
004a7727 | 283 | iounmap(map->handle); |
1da177e4 LT |
284 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
285 | return -EINVAL; | |
286 | } | |
287 | memset(list, 0, sizeof(*list)); | |
288 | list->map = map; | |
289 | ||
30e2fb18 | 290 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 291 | list_add(&list->head, &dev->maplist); |
8d153f71 | 292 | |
d1f2b55a | 293 | /* Assign a 32-bit handle */ |
30e2fb18 | 294 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
295 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
296 | map->offset; | |
a1d0fcf5 | 297 | ret = drm_map_handle(dev, &list->hash, user_token, 0); |
8d153f71 | 298 | if (ret) { |
85abb3f9 | 299 | if (map->type == _DRM_REGISTERS) |
004a7727 | 300 | iounmap(map->handle); |
8d153f71 TH |
301 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
302 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); | |
303 | mutex_unlock(&dev->struct_mutex); | |
304 | return ret; | |
305 | } | |
306 | ||
1545085a | 307 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 308 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 309 | |
89625eb1 | 310 | *maplist = list; |
7ab98401 | 311 | return 0; |
54ba2f76 | 312 | } |
89625eb1 | 313 | |
84b1fd10 | 314 | int drm_addmap(struct drm_device * dev, unsigned int offset, |
c60ce623 DA |
315 | unsigned int size, enum drm_map_type type, |
316 | enum drm_map_flags flags, drm_local_map_t ** map_ptr) | |
89625eb1 | 317 | { |
55910517 | 318 | struct drm_map_list *list; |
89625eb1 DA |
319 | int rc; |
320 | ||
321 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
322 | if (!rc) | |
323 | *map_ptr = list->map; | |
324 | return rc; | |
325 | } | |
b5e89ed5 | 326 | |
7ab98401 DA |
327 | EXPORT_SYMBOL(drm_addmap); |
328 | ||
329 | int drm_addmap_ioctl(struct inode *inode, struct file *filp, | |
330 | unsigned int cmd, unsigned long arg) | |
331 | { | |
84b1fd10 DA |
332 | struct drm_file *priv = filp->private_data; |
333 | struct drm_device *dev = priv->head->dev; | |
c60ce623 | 334 | struct drm_map map; |
55910517 | 335 | struct drm_map_list *maplist; |
c60ce623 | 336 | struct drm_map __user *argp = (void __user *)arg; |
7ab98401 DA |
337 | int err; |
338 | ||
339 | if (!(filp->f_mode & 3)) | |
340 | return -EACCES; /* Require read/write */ | |
341 | ||
b5e89ed5 | 342 | if (copy_from_user(&map, argp, sizeof(map))) { |
1da177e4 | 343 | return -EFAULT; |
7ab98401 DA |
344 | } |
345 | ||
d985c108 DA |
346 | if (!(capable(CAP_SYS_ADMIN) || map.type == _DRM_AGP)) |
347 | return -EPERM; | |
348 | ||
89625eb1 DA |
349 | err = drm_addmap_core(dev, map.offset, map.size, map.type, map.flags, |
350 | &maplist); | |
7ab98401 | 351 | |
b5e89ed5 | 352 | if (err) |
7ab98401 | 353 | return err; |
d1f2b55a | 354 | |
c60ce623 | 355 | if (copy_to_user(argp, maplist->map, sizeof(struct drm_map))) |
d1f2b55a | 356 | return -EFAULT; |
67e1a014 DA |
357 | |
358 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ | |
359 | if (put_user((void *)(unsigned long)maplist->user_token, &argp->handle)) | |
d1f2b55a | 360 | return -EFAULT; |
1da177e4 | 361 | return 0; |
88f399cd | 362 | } |
1da177e4 | 363 | |
1da177e4 LT |
364 | /** |
365 | * Remove a map private from list and deallocate resources if the mapping | |
366 | * isn't in use. | |
367 | * | |
368 | * \param inode device inode. | |
369 | * \param filp file pointer. | |
370 | * \param cmd command. | |
c60ce623 | 371 | * \param arg pointer to a struct drm_map structure. |
1da177e4 LT |
372 | * \return zero on success or a negative value on error. |
373 | * | |
374 | * Searches the map on drm_device::maplist, removes it from the list, see if | |
375 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
376 | * being on use. | |
377 | * | |
7ab98401 | 378 | * \sa drm_addmap |
1da177e4 | 379 | */ |
84b1fd10 | 380 | int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map) |
1da177e4 | 381 | { |
55910517 | 382 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 383 | drm_dma_handle_t dmah; |
bd1b331f | 384 | int found = 0; |
1da177e4 | 385 | |
836cf046 | 386 | /* Find the list entry for the map and remove it */ |
bd1b331f | 387 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 388 | if (r_list->map == map) { |
bd1b331f | 389 | list_del(&r_list->head); |
1545085a TH |
390 | drm_ht_remove_key(&dev->map_hash, |
391 | r_list->user_token >> PAGE_SHIFT); | |
bd1b331f DA |
392 | drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS); |
393 | found = 1; | |
836cf046 DA |
394 | break; |
395 | } | |
1da177e4 LT |
396 | } |
397 | ||
bd1b331f | 398 | if (!found) |
1da177e4 | 399 | return -EINVAL; |
1da177e4 | 400 | |
836cf046 DA |
401 | switch (map->type) { |
402 | case _DRM_REGISTERS: | |
004a7727 | 403 | iounmap(map->handle); |
836cf046 DA |
404 | /* FALLTHROUGH */ |
405 | case _DRM_FRAME_BUFFER: | |
406 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
407 | int retcode; | |
b5e89ed5 DA |
408 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
409 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 410 | } |
836cf046 DA |
411 | break; |
412 | case _DRM_SHM: | |
413 | vfree(map->handle); | |
414 | break; | |
415 | case _DRM_AGP: | |
416 | case _DRM_SCATTER_GATHER: | |
417 | break; | |
418 | case _DRM_CONSISTENT: | |
419 | dmah.vaddr = map->handle; | |
420 | dmah.busaddr = map->offset; | |
421 | dmah.size = map->size; | |
422 | __drm_pci_free(dev, &dmah); | |
423 | break; | |
1da177e4 | 424 | } |
836cf046 DA |
425 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
426 | ||
1da177e4 LT |
427 | return 0; |
428 | } | |
836cf046 | 429 | |
84b1fd10 | 430 | int drm_rmmap(struct drm_device *dev, drm_local_map_t *map) |
836cf046 DA |
431 | { |
432 | int ret; | |
433 | ||
30e2fb18 | 434 | mutex_lock(&dev->struct_mutex); |
836cf046 | 435 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 436 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
437 | |
438 | return ret; | |
439 | } | |
7ab98401 | 440 | |
836cf046 DA |
441 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
442 | * the last close of the device, and this is necessary for cleanup when things | |
443 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
444 | * like a pointless exercise since they're going away anyway. | |
445 | * | |
446 | * One use case might be after addmap is allowed for normal users for SHM and | |
447 | * gets used by drivers that the server doesn't need to care about. This seems | |
448 | * unlikely. | |
449 | */ | |
7ab98401 DA |
450 | int drm_rmmap_ioctl(struct inode *inode, struct file *filp, |
451 | unsigned int cmd, unsigned long arg) | |
452 | { | |
84b1fd10 DA |
453 | struct drm_file *priv = filp->private_data; |
454 | struct drm_device *dev = priv->head->dev; | |
c60ce623 | 455 | struct drm_map request; |
836cf046 | 456 | drm_local_map_t *map = NULL; |
55910517 | 457 | struct drm_map_list *r_list; |
836cf046 | 458 | int ret; |
7ab98401 | 459 | |
c60ce623 | 460 | if (copy_from_user(&request, (struct drm_map __user *) arg, sizeof(request))) { |
7ab98401 DA |
461 | return -EFAULT; |
462 | } | |
463 | ||
30e2fb18 | 464 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 465 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 466 | if (r_list->map && |
b5e89ed5 | 467 | r_list->user_token == (unsigned long)request.handle && |
836cf046 DA |
468 | r_list->map->flags & _DRM_REMOVABLE) { |
469 | map = r_list->map; | |
470 | break; | |
471 | } | |
472 | } | |
473 | ||
474 | /* List has wrapped around to the head pointer, or its empty we didn't | |
475 | * find anything. | |
476 | */ | |
bd1b331f | 477 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 478 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
479 | return -EINVAL; |
480 | } | |
481 | ||
7a3f1f21 TH |
482 | if (!map) { |
483 | mutex_unlock(&dev->struct_mutex); | |
836cf046 | 484 | return -EINVAL; |
7a3f1f21 | 485 | } |
836cf046 DA |
486 | |
487 | /* Register and framebuffer maps are permanent */ | |
488 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 489 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
490 | return 0; |
491 | } | |
492 | ||
493 | ret = drm_rmmap_locked(dev, map); | |
494 | ||
30e2fb18 | 495 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
496 | |
497 | return ret; | |
7ab98401 | 498 | } |
1da177e4 LT |
499 | |
500 | /** | |
501 | * Cleanup after an error on one of the addbufs() functions. | |
502 | * | |
836cf046 | 503 | * \param dev DRM device. |
1da177e4 LT |
504 | * \param entry buffer entry where the error occurred. |
505 | * | |
506 | * Frees any pages and buffers associated with the given entry. | |
507 | */ | |
cdd55a29 DA |
508 | static void drm_cleanup_buf_error(struct drm_device * dev, |
509 | struct drm_buf_entry * entry) | |
1da177e4 LT |
510 | { |
511 | int i; | |
512 | ||
513 | if (entry->seg_count) { | |
514 | for (i = 0; i < entry->seg_count; i++) { | |
515 | if (entry->seglist[i]) { | |
ddf19b97 | 516 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
517 | } |
518 | } | |
519 | drm_free(entry->seglist, | |
b5e89ed5 DA |
520 | entry->seg_count * |
521 | sizeof(*entry->seglist), DRM_MEM_SEGS); | |
1da177e4 LT |
522 | |
523 | entry->seg_count = 0; | |
524 | } | |
525 | ||
b5e89ed5 DA |
526 | if (entry->buf_count) { |
527 | for (i = 0; i < entry->buf_count; i++) { | |
1da177e4 LT |
528 | if (entry->buflist[i].dev_private) { |
529 | drm_free(entry->buflist[i].dev_private, | |
b5e89ed5 DA |
530 | entry->buflist[i].dev_priv_size, |
531 | DRM_MEM_BUFS); | |
1da177e4 LT |
532 | } |
533 | } | |
534 | drm_free(entry->buflist, | |
b5e89ed5 DA |
535 | entry->buf_count * |
536 | sizeof(*entry->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
537 | |
538 | entry->buf_count = 0; | |
539 | } | |
540 | } | |
541 | ||
542 | #if __OS_HAS_AGP | |
543 | /** | |
d59431bf | 544 | * Add AGP buffers for DMA transfers. |
1da177e4 | 545 | * |
84b1fd10 | 546 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 547 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 548 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 549 | * |
1da177e4 LT |
550 | * After some sanity checks creates a drm_buf structure for each buffer and |
551 | * reallocates the buffer list of the same size order to accommodate the new | |
552 | * buffers. | |
553 | */ | |
84b1fd10 | 554 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 555 | { |
cdd55a29 DA |
556 | struct drm_device_dma *dma = dev->dma; |
557 | struct drm_buf_entry *entry; | |
55910517 | 558 | struct drm_agp_mem *agp_entry; |
056219e2 | 559 | struct drm_buf *buf; |
1da177e4 LT |
560 | unsigned long offset; |
561 | unsigned long agp_offset; | |
562 | int count; | |
563 | int order; | |
564 | int size; | |
565 | int alignment; | |
566 | int page_order; | |
567 | int total; | |
568 | int byte_count; | |
54ba2f76 | 569 | int i, valid; |
056219e2 | 570 | struct drm_buf **temp_buflist; |
1da177e4 | 571 | |
b5e89ed5 DA |
572 | if (!dma) |
573 | return -EINVAL; | |
1da177e4 | 574 | |
d59431bf DA |
575 | count = request->count; |
576 | order = drm_order(request->size); | |
1da177e4 LT |
577 | size = 1 << order; |
578 | ||
b5e89ed5 DA |
579 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
580 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
581 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
582 | total = PAGE_SIZE << page_order; | |
583 | ||
584 | byte_count = 0; | |
d59431bf | 585 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 586 | |
b5e89ed5 DA |
587 | DRM_DEBUG("count: %d\n", count); |
588 | DRM_DEBUG("order: %d\n", order); | |
589 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 590 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
591 | DRM_DEBUG("alignment: %d\n", alignment); |
592 | DRM_DEBUG("page_order: %d\n", page_order); | |
593 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 594 | |
b5e89ed5 DA |
595 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
596 | return -EINVAL; | |
597 | if (dev->queue_count) | |
598 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 599 | |
54ba2f76 DA |
600 | /* Make sure buffers are located in AGP memory that we own */ |
601 | valid = 0; | |
bd1b331f | 602 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
603 | if ((agp_offset >= agp_entry->bound) && |
604 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
605 | valid = 1; | |
606 | break; | |
607 | } | |
608 | } | |
bd1b331f | 609 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
610 | DRM_DEBUG("zone invalid\n"); |
611 | return -EINVAL; | |
612 | } | |
b5e89ed5 DA |
613 | spin_lock(&dev->count_lock); |
614 | if (dev->buf_use) { | |
615 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
616 | return -EBUSY; |
617 | } | |
b5e89ed5 DA |
618 | atomic_inc(&dev->buf_alloc); |
619 | spin_unlock(&dev->count_lock); | |
1da177e4 | 620 | |
30e2fb18 | 621 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 622 | entry = &dma->bufs[order]; |
b5e89ed5 | 623 | if (entry->buf_count) { |
30e2fb18 | 624 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
625 | atomic_dec(&dev->buf_alloc); |
626 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
627 | } |
628 | ||
629 | if (count < 0 || count > 4096) { | |
30e2fb18 | 630 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 631 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
632 | return -EINVAL; |
633 | } | |
634 | ||
b5e89ed5 DA |
635 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
636 | DRM_MEM_BUFS); | |
637 | if (!entry->buflist) { | |
30e2fb18 | 638 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 639 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
640 | return -ENOMEM; |
641 | } | |
b5e89ed5 | 642 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
643 | |
644 | entry->buf_size = size; | |
645 | entry->page_order = page_order; | |
646 | ||
647 | offset = 0; | |
648 | ||
b5e89ed5 DA |
649 | while (entry->buf_count < count) { |
650 | buf = &entry->buflist[entry->buf_count]; | |
651 | buf->idx = dma->buf_count + entry->buf_count; | |
652 | buf->total = alignment; | |
653 | buf->order = order; | |
654 | buf->used = 0; | |
1da177e4 | 655 | |
b5e89ed5 | 656 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
657 | buf->bus_address = agp_offset + offset; |
658 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 659 | buf->next = NULL; |
1da177e4 LT |
660 | buf->waiting = 0; |
661 | buf->pending = 0; | |
b5e89ed5 DA |
662 | init_waitqueue_head(&buf->dma_wait); |
663 | buf->filp = NULL; | |
1da177e4 LT |
664 | |
665 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
666 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
667 | if (!buf->dev_private) { | |
1da177e4 LT |
668 | /* Set count correctly so we free the proper amount. */ |
669 | entry->buf_count = count; | |
b5e89ed5 | 670 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 671 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 672 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
673 | return -ENOMEM; |
674 | } | |
b5e89ed5 | 675 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 676 | |
b5e89ed5 | 677 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
678 | |
679 | offset += alignment; | |
680 | entry->buf_count++; | |
681 | byte_count += PAGE_SIZE << page_order; | |
682 | } | |
683 | ||
b5e89ed5 | 684 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 685 | |
b5e89ed5 DA |
686 | temp_buflist = drm_realloc(dma->buflist, |
687 | dma->buf_count * sizeof(*dma->buflist), | |
688 | (dma->buf_count + entry->buf_count) | |
689 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
690 | if (!temp_buflist) { | |
1da177e4 | 691 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 692 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 693 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 694 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
695 | return -ENOMEM; |
696 | } | |
697 | dma->buflist = temp_buflist; | |
698 | ||
b5e89ed5 | 699 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
700 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
701 | } | |
702 | ||
703 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
704 | dma->seg_count += entry->seg_count; |
705 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
706 | dma->byte_count += byte_count; |
707 | ||
b5e89ed5 DA |
708 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
709 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 710 | |
30e2fb18 | 711 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 712 | |
d59431bf DA |
713 | request->count = entry->buf_count; |
714 | request->size = size; | |
1da177e4 LT |
715 | |
716 | dma->flags = _DRM_DMA_USE_AGP; | |
717 | ||
b5e89ed5 | 718 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
719 | return 0; |
720 | } | |
d84f76d3 | 721 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 722 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 723 | |
84b1fd10 | 724 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 725 | { |
cdd55a29 | 726 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
727 | int count; |
728 | int order; | |
729 | int size; | |
730 | int total; | |
731 | int page_order; | |
cdd55a29 | 732 | struct drm_buf_entry *entry; |
ddf19b97 | 733 | drm_dma_handle_t *dmah; |
056219e2 | 734 | struct drm_buf *buf; |
1da177e4 LT |
735 | int alignment; |
736 | unsigned long offset; | |
737 | int i; | |
738 | int byte_count; | |
739 | int page_count; | |
740 | unsigned long *temp_pagelist; | |
056219e2 | 741 | struct drm_buf **temp_buflist; |
1da177e4 | 742 | |
b5e89ed5 DA |
743 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
744 | return -EINVAL; | |
d985c108 | 745 | |
b5e89ed5 DA |
746 | if (!dma) |
747 | return -EINVAL; | |
1da177e4 | 748 | |
d985c108 DA |
749 | if (!capable(CAP_SYS_ADMIN)) |
750 | return -EPERM; | |
751 | ||
d59431bf DA |
752 | count = request->count; |
753 | order = drm_order(request->size); | |
1da177e4 LT |
754 | size = 1 << order; |
755 | ||
b5e89ed5 DA |
756 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
757 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 758 | |
b5e89ed5 DA |
759 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
760 | return -EINVAL; | |
761 | if (dev->queue_count) | |
762 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 763 | |
d59431bf | 764 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 765 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
766 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
767 | total = PAGE_SIZE << page_order; | |
768 | ||
b5e89ed5 DA |
769 | spin_lock(&dev->count_lock); |
770 | if (dev->buf_use) { | |
771 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
772 | return -EBUSY; |
773 | } | |
b5e89ed5 DA |
774 | atomic_inc(&dev->buf_alloc); |
775 | spin_unlock(&dev->count_lock); | |
1da177e4 | 776 | |
30e2fb18 | 777 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 778 | entry = &dma->bufs[order]; |
b5e89ed5 | 779 | if (entry->buf_count) { |
30e2fb18 | 780 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 781 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
782 | return -ENOMEM; /* May only call once for each order */ |
783 | } | |
784 | ||
785 | if (count < 0 || count > 4096) { | |
30e2fb18 | 786 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 787 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
788 | return -EINVAL; |
789 | } | |
790 | ||
b5e89ed5 DA |
791 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
792 | DRM_MEM_BUFS); | |
793 | if (!entry->buflist) { | |
30e2fb18 | 794 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 795 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
796 | return -ENOMEM; |
797 | } | |
b5e89ed5 DA |
798 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
799 | ||
800 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), | |
801 | DRM_MEM_SEGS); | |
802 | if (!entry->seglist) { | |
803 | drm_free(entry->buflist, | |
804 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
30e2fb18 | 805 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 806 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
807 | return -ENOMEM; |
808 | } | |
b5e89ed5 | 809 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
810 | |
811 | /* Keep the original pagelist until we know all the allocations | |
812 | * have succeeded | |
813 | */ | |
b5e89ed5 DA |
814 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
815 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
1da177e4 | 816 | if (!temp_pagelist) { |
b5e89ed5 DA |
817 | drm_free(entry->buflist, |
818 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
819 | drm_free(entry->seglist, | |
820 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); | |
30e2fb18 | 821 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 822 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
823 | return -ENOMEM; |
824 | } | |
825 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
826 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
827 | DRM_DEBUG("pagelist: %d entries\n", | |
828 | dma->page_count + (count << page_order)); | |
1da177e4 | 829 | |
b5e89ed5 | 830 | entry->buf_size = size; |
1da177e4 LT |
831 | entry->page_order = page_order; |
832 | byte_count = 0; | |
833 | page_count = 0; | |
834 | ||
b5e89ed5 | 835 | while (entry->buf_count < count) { |
ddf19b97 DA |
836 | |
837 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); | |
838 | ||
839 | if (!dmah) { | |
1da177e4 LT |
840 | /* Set count correctly so we free the proper amount. */ |
841 | entry->buf_count = count; | |
842 | entry->seg_count = count; | |
843 | drm_cleanup_buf_error(dev, entry); | |
b5e89ed5 DA |
844 | drm_free(temp_pagelist, |
845 | (dma->page_count + (count << page_order)) | |
846 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 847 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 848 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
849 | return -ENOMEM; |
850 | } | |
ddf19b97 | 851 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
852 | for (i = 0; i < (1 << page_order); i++) { |
853 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
854 | dma->page_count + page_count, | |
ddf19b97 | 855 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 856 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 857 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 858 | } |
b5e89ed5 DA |
859 | for (offset = 0; |
860 | offset + size <= total && entry->buf_count < count; | |
861 | offset += alignment, ++entry->buf_count) { | |
862 | buf = &entry->buflist[entry->buf_count]; | |
863 | buf->idx = dma->buf_count + entry->buf_count; | |
864 | buf->total = alignment; | |
865 | buf->order = order; | |
866 | buf->used = 0; | |
867 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
868 | buf->address = (void *)(dmah->vaddr + offset); |
869 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 870 | buf->next = NULL; |
1da177e4 LT |
871 | buf->waiting = 0; |
872 | buf->pending = 0; | |
b5e89ed5 DA |
873 | init_waitqueue_head(&buf->dma_wait); |
874 | buf->filp = NULL; | |
1da177e4 LT |
875 | |
876 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
877 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
878 | DRM_MEM_BUFS); | |
879 | if (!buf->dev_private) { | |
1da177e4 LT |
880 | /* Set count correctly so we free the proper amount. */ |
881 | entry->buf_count = count; | |
882 | entry->seg_count = count; | |
b5e89ed5 DA |
883 | drm_cleanup_buf_error(dev, entry); |
884 | drm_free(temp_pagelist, | |
885 | (dma->page_count + | |
886 | (count << page_order)) | |
887 | * sizeof(*dma->pagelist), | |
888 | DRM_MEM_PAGES); | |
30e2fb18 | 889 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 890 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
891 | return -ENOMEM; |
892 | } | |
b5e89ed5 | 893 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 894 | |
b5e89ed5 DA |
895 | DRM_DEBUG("buffer %d @ %p\n", |
896 | entry->buf_count, buf->address); | |
1da177e4 LT |
897 | } |
898 | byte_count += PAGE_SIZE << page_order; | |
899 | } | |
900 | ||
b5e89ed5 DA |
901 | temp_buflist = drm_realloc(dma->buflist, |
902 | dma->buf_count * sizeof(*dma->buflist), | |
903 | (dma->buf_count + entry->buf_count) | |
904 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
905 | if (!temp_buflist) { |
906 | /* Free the entry because it isn't valid */ | |
b5e89ed5 DA |
907 | drm_cleanup_buf_error(dev, entry); |
908 | drm_free(temp_pagelist, | |
909 | (dma->page_count + (count << page_order)) | |
910 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 911 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 912 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
913 | return -ENOMEM; |
914 | } | |
915 | dma->buflist = temp_buflist; | |
916 | ||
b5e89ed5 | 917 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
918 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
919 | } | |
920 | ||
921 | /* No allocations failed, so now we can replace the orginal pagelist | |
922 | * with the new one. | |
923 | */ | |
924 | if (dma->page_count) { | |
925 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
926 | dma->page_count * sizeof(*dma->pagelist), |
927 | DRM_MEM_PAGES); | |
1da177e4 LT |
928 | } |
929 | dma->pagelist = temp_pagelist; | |
930 | ||
931 | dma->buf_count += entry->buf_count; | |
932 | dma->seg_count += entry->seg_count; | |
933 | dma->page_count += entry->seg_count << page_order; | |
934 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
935 | ||
30e2fb18 | 936 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 937 | |
d59431bf DA |
938 | request->count = entry->buf_count; |
939 | request->size = size; | |
1da177e4 | 940 | |
3417f33e GS |
941 | if (request->flags & _DRM_PCI_BUFFER_RO) |
942 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
943 | ||
b5e89ed5 | 944 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
945 | return 0; |
946 | ||
947 | } | |
d84f76d3 | 948 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 949 | |
84b1fd10 | 950 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 951 | { |
cdd55a29 DA |
952 | struct drm_device_dma *dma = dev->dma; |
953 | struct drm_buf_entry *entry; | |
056219e2 | 954 | struct drm_buf *buf; |
1da177e4 LT |
955 | unsigned long offset; |
956 | unsigned long agp_offset; | |
957 | int count; | |
958 | int order; | |
959 | int size; | |
960 | int alignment; | |
961 | int page_order; | |
962 | int total; | |
963 | int byte_count; | |
964 | int i; | |
056219e2 | 965 | struct drm_buf **temp_buflist; |
1da177e4 | 966 | |
b5e89ed5 DA |
967 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
968 | return -EINVAL; | |
969 | ||
970 | if (!dma) | |
971 | return -EINVAL; | |
1da177e4 | 972 | |
d985c108 DA |
973 | if (!capable(CAP_SYS_ADMIN)) |
974 | return -EPERM; | |
975 | ||
d59431bf DA |
976 | count = request->count; |
977 | order = drm_order(request->size); | |
1da177e4 LT |
978 | size = 1 << order; |
979 | ||
b5e89ed5 DA |
980 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
981 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
982 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
983 | total = PAGE_SIZE << page_order; | |
984 | ||
985 | byte_count = 0; | |
d59431bf | 986 | agp_offset = request->agp_start; |
1da177e4 | 987 | |
b5e89ed5 DA |
988 | DRM_DEBUG("count: %d\n", count); |
989 | DRM_DEBUG("order: %d\n", order); | |
990 | DRM_DEBUG("size: %d\n", size); | |
991 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
992 | DRM_DEBUG("alignment: %d\n", alignment); | |
993 | DRM_DEBUG("page_order: %d\n", page_order); | |
994 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 995 | |
b5e89ed5 DA |
996 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
997 | return -EINVAL; | |
998 | if (dev->queue_count) | |
999 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1000 | |
b5e89ed5 DA |
1001 | spin_lock(&dev->count_lock); |
1002 | if (dev->buf_use) { | |
1003 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1004 | return -EBUSY; |
1005 | } | |
b5e89ed5 DA |
1006 | atomic_inc(&dev->buf_alloc); |
1007 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1008 | |
30e2fb18 | 1009 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1010 | entry = &dma->bufs[order]; |
b5e89ed5 | 1011 | if (entry->buf_count) { |
30e2fb18 | 1012 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1013 | atomic_dec(&dev->buf_alloc); |
1014 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1015 | } |
1016 | ||
1017 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1018 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1019 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1020 | return -EINVAL; |
1021 | } | |
1022 | ||
b5e89ed5 DA |
1023 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
1024 | DRM_MEM_BUFS); | |
1025 | if (!entry->buflist) { | |
30e2fb18 | 1026 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1027 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1028 | return -ENOMEM; |
1029 | } | |
b5e89ed5 | 1030 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
1031 | |
1032 | entry->buf_size = size; | |
1033 | entry->page_order = page_order; | |
1034 | ||
1035 | offset = 0; | |
1036 | ||
b5e89ed5 DA |
1037 | while (entry->buf_count < count) { |
1038 | buf = &entry->buflist[entry->buf_count]; | |
1039 | buf->idx = dma->buf_count + entry->buf_count; | |
1040 | buf->total = alignment; | |
1041 | buf->order = order; | |
1042 | buf->used = 0; | |
1da177e4 | 1043 | |
b5e89ed5 | 1044 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1045 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1046 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1047 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1048 | buf->next = NULL; |
1da177e4 LT |
1049 | buf->waiting = 0; |
1050 | buf->pending = 0; | |
b5e89ed5 DA |
1051 | init_waitqueue_head(&buf->dma_wait); |
1052 | buf->filp = NULL; | |
1da177e4 LT |
1053 | |
1054 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
1055 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
1056 | if (!buf->dev_private) { | |
1da177e4 LT |
1057 | /* Set count correctly so we free the proper amount. */ |
1058 | entry->buf_count = count; | |
b5e89ed5 | 1059 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1060 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1061 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1062 | return -ENOMEM; |
1063 | } | |
1064 | ||
b5e89ed5 | 1065 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1066 | |
b5e89ed5 | 1067 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1068 | |
1069 | offset += alignment; | |
1070 | entry->buf_count++; | |
1071 | byte_count += PAGE_SIZE << page_order; | |
1072 | } | |
1073 | ||
b5e89ed5 | 1074 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1075 | |
b5e89ed5 DA |
1076 | temp_buflist = drm_realloc(dma->buflist, |
1077 | dma->buf_count * sizeof(*dma->buflist), | |
1078 | (dma->buf_count + entry->buf_count) | |
1079 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1080 | if (!temp_buflist) { | |
1da177e4 | 1081 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1082 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1083 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1084 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1085 | return -ENOMEM; |
1086 | } | |
1087 | dma->buflist = temp_buflist; | |
1088 | ||
b5e89ed5 | 1089 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1090 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1091 | } | |
1092 | ||
1093 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1094 | dma->seg_count += entry->seg_count; |
1095 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1096 | dma->byte_count += byte_count; |
1097 | ||
b5e89ed5 DA |
1098 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1099 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1100 | |
30e2fb18 | 1101 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1102 | |
d59431bf DA |
1103 | request->count = entry->buf_count; |
1104 | request->size = size; | |
1da177e4 LT |
1105 | |
1106 | dma->flags = _DRM_DMA_USE_SG; | |
1107 | ||
b5e89ed5 | 1108 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1109 | return 0; |
1110 | } | |
1111 | ||
84b1fd10 | 1112 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1113 | { |
cdd55a29 DA |
1114 | struct drm_device_dma *dma = dev->dma; |
1115 | struct drm_buf_entry *entry; | |
056219e2 | 1116 | struct drm_buf *buf; |
b84397d6 DA |
1117 | unsigned long offset; |
1118 | unsigned long agp_offset; | |
1119 | int count; | |
1120 | int order; | |
1121 | int size; | |
1122 | int alignment; | |
1123 | int page_order; | |
1124 | int total; | |
1125 | int byte_count; | |
1126 | int i; | |
056219e2 | 1127 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1128 | |
1129 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1130 | return -EINVAL; | |
b5e89ed5 | 1131 | |
b84397d6 DA |
1132 | if (!dma) |
1133 | return -EINVAL; | |
1134 | ||
d985c108 DA |
1135 | if (!capable(CAP_SYS_ADMIN)) |
1136 | return -EPERM; | |
1137 | ||
d59431bf DA |
1138 | count = request->count; |
1139 | order = drm_order(request->size); | |
b84397d6 DA |
1140 | size = 1 << order; |
1141 | ||
d59431bf | 1142 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1143 | ? PAGE_ALIGN(size) : size; |
1144 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1145 | total = PAGE_SIZE << page_order; | |
1146 | ||
1147 | byte_count = 0; | |
d59431bf | 1148 | agp_offset = request->agp_start; |
b84397d6 DA |
1149 | |
1150 | DRM_DEBUG("count: %d\n", count); | |
1151 | DRM_DEBUG("order: %d\n", order); | |
1152 | DRM_DEBUG("size: %d\n", size); | |
1153 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1154 | DRM_DEBUG("alignment: %d\n", alignment); | |
1155 | DRM_DEBUG("page_order: %d\n", page_order); | |
1156 | DRM_DEBUG("total: %d\n", total); | |
1157 | ||
1158 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1159 | return -EINVAL; | |
1160 | if (dev->queue_count) | |
1161 | return -EBUSY; /* Not while in use */ | |
1162 | ||
1163 | spin_lock(&dev->count_lock); | |
1164 | if (dev->buf_use) { | |
1165 | spin_unlock(&dev->count_lock); | |
1166 | return -EBUSY; | |
1167 | } | |
1168 | atomic_inc(&dev->buf_alloc); | |
1169 | spin_unlock(&dev->count_lock); | |
1170 | ||
30e2fb18 | 1171 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1172 | entry = &dma->bufs[order]; |
1173 | if (entry->buf_count) { | |
30e2fb18 | 1174 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1175 | atomic_dec(&dev->buf_alloc); |
1176 | return -ENOMEM; /* May only call once for each order */ | |
1177 | } | |
1178 | ||
1179 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1180 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1181 | atomic_dec(&dev->buf_alloc); |
1182 | return -EINVAL; | |
1183 | } | |
1184 | ||
1185 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), | |
1186 | DRM_MEM_BUFS); | |
1187 | if (!entry->buflist) { | |
30e2fb18 | 1188 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1189 | atomic_dec(&dev->buf_alloc); |
1190 | return -ENOMEM; | |
1191 | } | |
1192 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1193 | ||
1194 | entry->buf_size = size; | |
1195 | entry->page_order = page_order; | |
1196 | ||
1197 | offset = 0; | |
1198 | ||
1199 | while (entry->buf_count < count) { | |
1200 | buf = &entry->buflist[entry->buf_count]; | |
1201 | buf->idx = dma->buf_count + entry->buf_count; | |
1202 | buf->total = alignment; | |
1203 | buf->order = order; | |
1204 | buf->used = 0; | |
1205 | ||
1206 | buf->offset = (dma->byte_count + offset); | |
1207 | buf->bus_address = agp_offset + offset; | |
1208 | buf->address = (void *)(agp_offset + offset); | |
1209 | buf->next = NULL; | |
1210 | buf->waiting = 0; | |
1211 | buf->pending = 0; | |
1212 | init_waitqueue_head(&buf->dma_wait); | |
1213 | buf->filp = NULL; | |
1214 | ||
1215 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
1216 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); | |
1217 | if (!buf->dev_private) { | |
1218 | /* Set count correctly so we free the proper amount. */ | |
1219 | entry->buf_count = count; | |
1220 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1221 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1222 | atomic_dec(&dev->buf_alloc); |
1223 | return -ENOMEM; | |
1224 | } | |
1225 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1226 | ||
1227 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1228 | ||
1229 | offset += alignment; | |
1230 | entry->buf_count++; | |
1231 | byte_count += PAGE_SIZE << page_order; | |
1232 | } | |
1233 | ||
1234 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1235 | ||
1236 | temp_buflist = drm_realloc(dma->buflist, | |
1237 | dma->buf_count * sizeof(*dma->buflist), | |
1238 | (dma->buf_count + entry->buf_count) | |
1239 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1240 | if (!temp_buflist) { | |
1241 | /* Free the entry because it isn't valid */ | |
1242 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1243 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1244 | atomic_dec(&dev->buf_alloc); |
1245 | return -ENOMEM; | |
1246 | } | |
1247 | dma->buflist = temp_buflist; | |
1248 | ||
1249 | for (i = 0; i < entry->buf_count; i++) { | |
1250 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1251 | } | |
1252 | ||
1253 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1254 | dma->seg_count += entry->seg_count; |
1255 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1256 | dma->byte_count += byte_count; |
1257 | ||
1258 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1259 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1260 | ||
30e2fb18 | 1261 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1262 | |
d59431bf DA |
1263 | request->count = entry->buf_count; |
1264 | request->size = size; | |
b84397d6 DA |
1265 | |
1266 | dma->flags = _DRM_DMA_USE_FB; | |
1267 | ||
1268 | atomic_dec(&dev->buf_alloc); | |
1269 | return 0; | |
1270 | } | |
d985c108 | 1271 | |
b84397d6 | 1272 | |
1da177e4 LT |
1273 | /** |
1274 | * Add buffers for DMA transfers (ioctl). | |
1275 | * | |
1276 | * \param inode device inode. | |
1277 | * \param filp file pointer. | |
1278 | * \param cmd command. | |
c60ce623 | 1279 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1280 | * \return zero on success or a negative number on failure. |
1281 | * | |
1282 | * According with the memory type specified in drm_buf_desc::flags and the | |
1283 | * build options, it dispatches the call either to addbufs_agp(), | |
1284 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1285 | * PCI memory respectively. | |
1286 | */ | |
b5e89ed5 DA |
1287 | int drm_addbufs(struct inode *inode, struct file *filp, |
1288 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1289 | { |
c60ce623 | 1290 | struct drm_buf_desc request; |
84b1fd10 DA |
1291 | struct drm_file *priv = filp->private_data; |
1292 | struct drm_device *dev = priv->head->dev; | |
d59431bf | 1293 | int ret; |
b5e89ed5 | 1294 | |
1da177e4 LT |
1295 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1296 | return -EINVAL; | |
1297 | ||
c60ce623 | 1298 | if (copy_from_user(&request, (struct drm_buf_desc __user *) arg, |
b5e89ed5 | 1299 | sizeof(request))) |
1da177e4 LT |
1300 | return -EFAULT; |
1301 | ||
1302 | #if __OS_HAS_AGP | |
b5e89ed5 DA |
1303 | if (request.flags & _DRM_AGP_BUFFER) |
1304 | ret = drm_addbufs_agp(dev, &request); | |
1da177e4 LT |
1305 | else |
1306 | #endif | |
b5e89ed5 DA |
1307 | if (request.flags & _DRM_SG_BUFFER) |
1308 | ret = drm_addbufs_sg(dev, &request); | |
1309 | else if (request.flags & _DRM_FB_BUFFER) | |
1310 | ret = drm_addbufs_fb(dev, &request); | |
1da177e4 | 1311 | else |
b5e89ed5 | 1312 | ret = drm_addbufs_pci(dev, &request); |
d59431bf | 1313 | |
b5e89ed5 DA |
1314 | if (ret == 0) { |
1315 | if (copy_to_user((void __user *)arg, &request, sizeof(request))) { | |
d59431bf DA |
1316 | ret = -EFAULT; |
1317 | } | |
1318 | } | |
1319 | return ret; | |
1da177e4 LT |
1320 | } |
1321 | ||
1da177e4 LT |
1322 | /** |
1323 | * Get information about the buffer mappings. | |
1324 | * | |
1325 | * This was originally mean for debugging purposes, or by a sophisticated | |
1326 | * client library to determine how best to use the available buffers (e.g., | |
1327 | * large buffers can be used for image transfer). | |
1328 | * | |
1329 | * \param inode device inode. | |
1330 | * \param filp file pointer. | |
1331 | * \param cmd command. | |
1332 | * \param arg pointer to a drm_buf_info structure. | |
1333 | * \return zero on success or a negative number on failure. | |
1334 | * | |
1335 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1336 | * lock, preventing of allocating more buffers after this call. Information | |
1337 | * about each requested buffer is then copied into user space. | |
1338 | */ | |
b5e89ed5 DA |
1339 | int drm_infobufs(struct inode *inode, struct file *filp, |
1340 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1341 | { |
84b1fd10 DA |
1342 | struct drm_file *priv = filp->private_data; |
1343 | struct drm_device *dev = priv->head->dev; | |
cdd55a29 | 1344 | struct drm_device_dma *dma = dev->dma; |
c60ce623 DA |
1345 | struct drm_buf_info request; |
1346 | struct drm_buf_info __user *argp = (void __user *)arg; | |
1da177e4 LT |
1347 | int i; |
1348 | int count; | |
1349 | ||
1350 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1351 | return -EINVAL; | |
1352 | ||
b5e89ed5 DA |
1353 | if (!dma) |
1354 | return -EINVAL; | |
1da177e4 | 1355 | |
b5e89ed5 DA |
1356 | spin_lock(&dev->count_lock); |
1357 | if (atomic_read(&dev->buf_alloc)) { | |
1358 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1359 | return -EBUSY; |
1360 | } | |
1361 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1362 | spin_unlock(&dev->count_lock); |
1da177e4 | 1363 | |
b5e89ed5 | 1364 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1365 | return -EFAULT; |
1366 | ||
b5e89ed5 DA |
1367 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1368 | if (dma->bufs[i].buf_count) | |
1369 | ++count; | |
1da177e4 LT |
1370 | } |
1371 | ||
b5e89ed5 | 1372 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1373 | |
b5e89ed5 DA |
1374 | if (request.count >= count) { |
1375 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { | |
1376 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1377 | struct drm_buf_desc __user *to = |
b5e89ed5 | 1378 | &request.list[count]; |
cdd55a29 DA |
1379 | struct drm_buf_entry *from = &dma->bufs[i]; |
1380 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1381 | if (copy_to_user(&to->count, |
1382 | &from->buf_count, | |
1383 | sizeof(from->buf_count)) || | |
1384 | copy_to_user(&to->size, | |
1385 | &from->buf_size, | |
1386 | sizeof(from->buf_size)) || | |
1387 | copy_to_user(&to->low_mark, | |
1388 | &list->low_mark, | |
1389 | sizeof(list->low_mark)) || | |
1390 | copy_to_user(&to->high_mark, | |
1391 | &list->high_mark, | |
1392 | sizeof(list->high_mark))) | |
1da177e4 LT |
1393 | return -EFAULT; |
1394 | ||
b5e89ed5 DA |
1395 | DRM_DEBUG("%d %d %d %d %d\n", |
1396 | i, | |
1397 | dma->bufs[i].buf_count, | |
1398 | dma->bufs[i].buf_size, | |
1399 | dma->bufs[i].freelist.low_mark, | |
1400 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1401 | ++count; |
1402 | } | |
1403 | } | |
1404 | } | |
1405 | request.count = count; | |
1406 | ||
b5e89ed5 | 1407 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1408 | return -EFAULT; |
1409 | ||
1410 | return 0; | |
1411 | } | |
1412 | ||
1413 | /** | |
1414 | * Specifies a low and high water mark for buffer allocation | |
1415 | * | |
1416 | * \param inode device inode. | |
1417 | * \param filp file pointer. | |
1418 | * \param cmd command. | |
1419 | * \param arg a pointer to a drm_buf_desc structure. | |
1420 | * \return zero on success or a negative number on failure. | |
1421 | * | |
1422 | * Verifies that the size order is bounded between the admissible orders and | |
1423 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1424 | * | |
1425 | * \note This ioctl is deprecated and mostly never used. | |
1426 | */ | |
b5e89ed5 DA |
1427 | int drm_markbufs(struct inode *inode, struct file *filp, |
1428 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1429 | { |
84b1fd10 DA |
1430 | struct drm_file *priv = filp->private_data; |
1431 | struct drm_device *dev = priv->head->dev; | |
cdd55a29 | 1432 | struct drm_device_dma *dma = dev->dma; |
c60ce623 | 1433 | struct drm_buf_desc request; |
1da177e4 | 1434 | int order; |
cdd55a29 | 1435 | struct drm_buf_entry *entry; |
1da177e4 LT |
1436 | |
1437 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1438 | return -EINVAL; | |
1439 | ||
b5e89ed5 DA |
1440 | if (!dma) |
1441 | return -EINVAL; | |
1da177e4 | 1442 | |
b5e89ed5 | 1443 | if (copy_from_user(&request, |
c60ce623 | 1444 | (struct drm_buf_desc __user *) arg, sizeof(request))) |
1da177e4 LT |
1445 | return -EFAULT; |
1446 | ||
b5e89ed5 DA |
1447 | DRM_DEBUG("%d, %d, %d\n", |
1448 | request.size, request.low_mark, request.high_mark); | |
1449 | order = drm_order(request.size); | |
1450 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1451 | return -EINVAL; | |
1da177e4 LT |
1452 | entry = &dma->bufs[order]; |
1453 | ||
b5e89ed5 | 1454 | if (request.low_mark < 0 || request.low_mark > entry->buf_count) |
1da177e4 | 1455 | return -EINVAL; |
b5e89ed5 | 1456 | if (request.high_mark < 0 || request.high_mark > entry->buf_count) |
1da177e4 LT |
1457 | return -EINVAL; |
1458 | ||
b5e89ed5 | 1459 | entry->freelist.low_mark = request.low_mark; |
1da177e4 LT |
1460 | entry->freelist.high_mark = request.high_mark; |
1461 | ||
1462 | return 0; | |
1463 | } | |
1464 | ||
1465 | /** | |
b5e89ed5 | 1466 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1467 | * |
1468 | * \param inode device inode. | |
1469 | * \param filp file pointer. | |
1470 | * \param cmd command. | |
1471 | * \param arg pointer to a drm_buf_free structure. | |
1472 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1473 | * |
1da177e4 LT |
1474 | * Calls free_buffer() for each used buffer. |
1475 | * This function is primarily used for debugging. | |
1476 | */ | |
b5e89ed5 DA |
1477 | int drm_freebufs(struct inode *inode, struct file *filp, |
1478 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1479 | { |
84b1fd10 DA |
1480 | struct drm_file *priv = filp->private_data; |
1481 | struct drm_device *dev = priv->head->dev; | |
cdd55a29 | 1482 | struct drm_device_dma *dma = dev->dma; |
c60ce623 | 1483 | struct drm_buf_free request; |
1da177e4 LT |
1484 | int i; |
1485 | int idx; | |
056219e2 | 1486 | struct drm_buf *buf; |
1da177e4 LT |
1487 | |
1488 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1489 | return -EINVAL; | |
1490 | ||
b5e89ed5 DA |
1491 | if (!dma) |
1492 | return -EINVAL; | |
1da177e4 | 1493 | |
b5e89ed5 | 1494 | if (copy_from_user(&request, |
c60ce623 | 1495 | (struct drm_buf_free __user *) arg, sizeof(request))) |
1da177e4 LT |
1496 | return -EFAULT; |
1497 | ||
b5e89ed5 DA |
1498 | DRM_DEBUG("%d\n", request.count); |
1499 | for (i = 0; i < request.count; i++) { | |
1500 | if (copy_from_user(&idx, &request.list[i], sizeof(idx))) | |
1da177e4 | 1501 | return -EFAULT; |
b5e89ed5 DA |
1502 | if (idx < 0 || idx >= dma->buf_count) { |
1503 | DRM_ERROR("Index %d (of %d max)\n", | |
1504 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1505 | return -EINVAL; |
1506 | } | |
1507 | buf = dma->buflist[idx]; | |
b5e89ed5 DA |
1508 | if (buf->filp != filp) { |
1509 | DRM_ERROR("Process %d freeing buffer not owned\n", | |
1510 | current->pid); | |
1da177e4 LT |
1511 | return -EINVAL; |
1512 | } | |
b5e89ed5 | 1513 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1514 | } |
1515 | ||
1516 | return 0; | |
1517 | } | |
1518 | ||
1519 | /** | |
1520 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1521 | * | |
1522 | * \param inode device inode. | |
1523 | * \param filp file pointer. | |
1524 | * \param cmd command. | |
1525 | * \param arg pointer to a drm_buf_map structure. | |
1526 | * \return zero on success or a negative number on failure. | |
1527 | * | |
3417f33e GS |
1528 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1529 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1530 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1531 | * drm_mmap_dma(). | |
1da177e4 | 1532 | */ |
b5e89ed5 DA |
1533 | int drm_mapbufs(struct inode *inode, struct file *filp, |
1534 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1535 | { |
84b1fd10 DA |
1536 | struct drm_file *priv = filp->private_data; |
1537 | struct drm_device *dev = priv->head->dev; | |
cdd55a29 | 1538 | struct drm_device_dma *dma = dev->dma; |
c60ce623 | 1539 | struct drm_buf_map __user *argp = (void __user *)arg; |
1da177e4 LT |
1540 | int retcode = 0; |
1541 | const int zero = 0; | |
1542 | unsigned long virtual; | |
1543 | unsigned long address; | |
c60ce623 | 1544 | struct drm_buf_map request; |
1da177e4 LT |
1545 | int i; |
1546 | ||
1547 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1548 | return -EINVAL; | |
1549 | ||
b5e89ed5 DA |
1550 | if (!dma) |
1551 | return -EINVAL; | |
1da177e4 | 1552 | |
b5e89ed5 DA |
1553 | spin_lock(&dev->count_lock); |
1554 | if (atomic_read(&dev->buf_alloc)) { | |
1555 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1556 | return -EBUSY; |
1557 | } | |
1558 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1559 | spin_unlock(&dev->count_lock); |
1da177e4 | 1560 | |
b5e89ed5 | 1561 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1562 | return -EFAULT; |
1563 | ||
b5e89ed5 | 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))) { | |
c60ce623 | 1570 | struct drm_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 | } | |
1577 | ||
b5e89ed5 DA |
1578 | down_write(¤t->mm->mmap_sem); |
1579 | virtual = do_mmap(filp, 0, map->size, | |
1580 | PROT_READ | PROT_WRITE, | |
1581 | MAP_SHARED, token); | |
1582 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1583 | } else { |
b5e89ed5 DA |
1584 | down_write(¤t->mm->mmap_sem); |
1585 | virtual = do_mmap(filp, 0, dma->byte_count, | |
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 | } | |
1595 | request.virtual = (void __user *)virtual; | |
1596 | ||
b5e89ed5 DA |
1597 | for (i = 0; i < dma->buf_count; i++) { |
1598 | if (copy_to_user(&request.list[i].idx, | |
1599 | &dma->buflist[i]->idx, | |
1600 | sizeof(request.list[0].idx))) { | |
1da177e4 LT |
1601 | retcode = -EFAULT; |
1602 | goto done; | |
1603 | } | |
b5e89ed5 DA |
1604 | if (copy_to_user(&request.list[i].total, |
1605 | &dma->buflist[i]->total, | |
1606 | sizeof(request.list[0].total))) { | |
1da177e4 LT |
1607 | retcode = -EFAULT; |
1608 | goto done; | |
1609 | } | |
b5e89ed5 DA |
1610 | if (copy_to_user(&request.list[i].used, |
1611 | &zero, sizeof(zero))) { | |
1da177e4 LT |
1612 | retcode = -EFAULT; |
1613 | goto done; | |
1614 | } | |
b5e89ed5 DA |
1615 | address = virtual + dma->buflist[i]->offset; /* *** */ |
1616 | if (copy_to_user(&request.list[i].address, | |
1617 | &address, sizeof(address))) { | |
1da177e4 LT |
1618 | retcode = -EFAULT; |
1619 | goto done; | |
1620 | } | |
1621 | } | |
1622 | } | |
b5e89ed5 | 1623 | done: |
1da177e4 | 1624 | request.count = dma->buf_count; |
b5e89ed5 | 1625 | DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode); |
1da177e4 | 1626 | |
b5e89ed5 | 1627 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1628 | return -EFAULT; |
1629 | ||
1630 | return retcode; | |
1631 | } | |
1632 | ||
836cf046 DA |
1633 | /** |
1634 | * Compute size order. Returns the exponent of the smaller power of two which | |
1635 | * is greater or equal to given number. | |
b5e89ed5 | 1636 | * |
836cf046 DA |
1637 | * \param size size. |
1638 | * \return order. | |
1639 | * | |
1640 | * \todo Can be made faster. | |
1641 | */ | |
b5e89ed5 | 1642 | int drm_order(unsigned long size) |
836cf046 DA |
1643 | { |
1644 | int order; | |
1645 | unsigned long tmp; | |
1646 | ||
b5e89ed5 | 1647 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1648 | |
1649 | if (size & (size - 1)) | |
1650 | ++order; | |
1651 | ||
1652 | return order; | |
1653 | } | |
1654 | EXPORT_SYMBOL(drm_order); | |
d985c108 DA |
1655 | |
1656 |