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 | ||
d985c108 | 39 | unsigned long drm_get_resource_start(drm_device_t *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 | |
d985c108 | 45 | unsigned long drm_get_resource_len(drm_device_t *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 | |
d985c108 DA |
52 | static drm_map_list_t *drm_find_matching_map(drm_device_t *dev, |
53 | drm_local_map_t *map) | |
836cf046 DA |
54 | { |
55 | struct list_head *list; | |
1da177e4 | 56 | |
836cf046 DA |
57 | list_for_each(list, &dev->maplist->head) { |
58 | drm_map_list_t *entry = list_entry(list, drm_map_list_t, head); | |
59 | if (entry->map && map->type == entry->map->type && | |
54ba2f76 DA |
60 | ((entry->map->offset == map->offset) || |
61 | (map->type == _DRM_SHM && map->flags==_DRM_CONTAINS_LOCK))) { | |
89625eb1 | 62 | return entry; |
836cf046 DA |
63 | } |
64 | } | |
65 | ||
66 | return NULL; | |
1da177e4 | 67 | } |
1da177e4 | 68 | |
fb41e54b AB |
69 | static int drm_map_handle(drm_device_t *dev, drm_hash_item_t *hash, |
70 | unsigned long user_token, int hashed_handle) | |
d1f2b55a | 71 | { |
8d153f71 | 72 | int use_hashed_handle; |
c2604ce0 | 73 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
74 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
75 | #elif (BITS_PER_LONG == 32) | |
76 | use_hashed_handle = hashed_handle; | |
77 | #else | |
78 | #error Unsupported long size. Neither 64 nor 32 bits. | |
79 | #endif | |
d1f2b55a | 80 | |
e08870c8 TH |
81 | if (!use_hashed_handle) { |
82 | int ret; | |
1545085a | 83 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
84 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
85 | if (ret != -EINVAL) | |
86 | return ret; | |
d1f2b55a | 87 | } |
e08870c8 TH |
88 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
89 | user_token, 32 - PAGE_SHIFT - 3, | |
1545085a | 90 | 0, DRM_MAP_HASH_OFFSET >> PAGE_SHIFT); |
d1f2b55a | 91 | } |
9a186645 | 92 | |
1da177e4 LT |
93 | /** |
94 | * Ioctl to specify a range of memory that is available for mapping by a non-root process. | |
95 | * | |
96 | * \param inode device inode. | |
97 | * \param filp file pointer. | |
98 | * \param cmd command. | |
99 | * \param arg pointer to a drm_map structure. | |
100 | * \return zero on success or a negative value on error. | |
101 | * | |
102 | * Adjusts the memory offset to its absolute value according to the mapping | |
103 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
104 | * applicable and if supported by the kernel. | |
105 | */ | |
b3a83639 DA |
106 | static int drm_addmap_core(drm_device_t * dev, unsigned int offset, |
107 | unsigned int size, drm_map_type_t type, | |
108 | drm_map_flags_t flags, drm_map_list_t ** maplist) | |
1da177e4 | 109 | { |
1da177e4 | 110 | drm_map_t *map; |
1da177e4 | 111 | drm_map_list_t *list; |
9c8da5eb | 112 | drm_dma_handle_t *dmah; |
8d153f71 TH |
113 | unsigned long user_token; |
114 | int ret; | |
1da177e4 | 115 | |
b5e89ed5 DA |
116 | map = drm_alloc(sizeof(*map), DRM_MEM_MAPS); |
117 | if (!map) | |
1da177e4 LT |
118 | return -ENOMEM; |
119 | ||
7ab98401 DA |
120 | map->offset = offset; |
121 | map->size = size; | |
122 | map->flags = flags; | |
123 | map->type = type; | |
1da177e4 LT |
124 | |
125 | /* Only allow shared memory to be removable since we only keep enough | |
126 | * book keeping information about shared memory to allow for removal | |
127 | * when processes fork. | |
128 | */ | |
b5e89ed5 DA |
129 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
130 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
131 | return -EINVAL; |
132 | } | |
b5e89ed5 DA |
133 | DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n", |
134 | map->offset, map->size, map->type); | |
135 | if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) { | |
136 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
137 | return -EINVAL; |
138 | } | |
b5e89ed5 | 139 | map->mtrr = -1; |
1da177e4 LT |
140 | map->handle = NULL; |
141 | ||
b5e89ed5 | 142 | switch (map->type) { |
1da177e4 LT |
143 | case _DRM_REGISTERS: |
144 | case _DRM_FRAME_BUFFER: | |
88f399cd | 145 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) |
8d2ea625 | 146 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 DA |
147 | map->offset < virt_to_phys(high_memory)) { |
148 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
149 | return -EINVAL; |
150 | } | |
151 | #endif | |
152 | #ifdef __alpha__ | |
153 | map->offset += dev->hose->mem_space->start; | |
154 | #endif | |
836cf046 DA |
155 | /* Some drivers preinitialize some maps, without the X Server |
156 | * needing to be aware of it. Therefore, we just return success | |
157 | * when the server tries to create a duplicate map. | |
158 | */ | |
89625eb1 DA |
159 | list = drm_find_matching_map(dev, map); |
160 | if (list != NULL) { | |
161 | if (list->map->size != map->size) { | |
836cf046 | 162 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
163 | "mismatched sizes, (%ld vs %ld)\n", |
164 | map->type, map->size, | |
165 | list->map->size); | |
89625eb1 | 166 | list->map->size = map->size; |
836cf046 DA |
167 | } |
168 | ||
169 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
89625eb1 | 170 | *maplist = list; |
836cf046 DA |
171 | return 0; |
172 | } | |
173 | ||
1da177e4 | 174 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
175 | if (map->type == _DRM_FRAME_BUFFER || |
176 | (map->flags & _DRM_WRITE_COMBINING)) { | |
177 | map->mtrr = mtrr_add(map->offset, map->size, | |
178 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
179 | } |
180 | } | |
181 | if (map->type == _DRM_REGISTERS) | |
004a7727 | 182 | map->handle = ioremap(map->offset, map->size); |
1da177e4 | 183 | break; |
1da177e4 | 184 | case _DRM_SHM: |
54ba2f76 DA |
185 | list = drm_find_matching_map(dev, map); |
186 | if (list != NULL) { | |
187 | if(list->map->size != map->size) { | |
188 | DRM_DEBUG("Matching maps of type %d with " | |
189 | "mismatched sizes, (%ld vs %ld)\n", | |
190 | map->type, map->size, list->map->size); | |
191 | list->map->size = map->size; | |
192 | } | |
193 | ||
194 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
195 | *maplist = list; | |
196 | return 0; | |
197 | } | |
f239b7b0 | 198 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
199 | DRM_DEBUG("%lu %d %p\n", |
200 | map->size, drm_order(map->size), map->handle); | |
201 | if (!map->handle) { | |
202 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
203 | return -ENOMEM; |
204 | } | |
205 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 206 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 LT |
207 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
208 | if (dev->lock.hw_lock != NULL) { | |
b5e89ed5 DA |
209 | vfree(map->handle); |
210 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
211 | return -EBUSY; |
212 | } | |
b5e89ed5 | 213 | dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
214 | } |
215 | break; | |
54ba2f76 DA |
216 | case _DRM_AGP: { |
217 | drm_agp_mem_t *entry; | |
218 | int valid = 0; | |
219 | ||
220 | if (!drm_core_has_AGP(dev)) { | |
221 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
222 | return -EINVAL; | |
223 | } | |
1da177e4 | 224 | #ifdef __alpha__ |
54ba2f76 | 225 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 226 | #endif |
54ba2f76 DA |
227 | /* Note: dev->agp->base may actually be 0 when the DRM |
228 | * is not in control of AGP space. But if user space is | |
229 | * it should already have added the AGP base itself. | |
230 | */ | |
231 | map->offset += dev->agp->base; | |
232 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ | |
233 | ||
234 | /* This assumes the DRM is in total control of AGP space. | |
235 | * It's not always the case as AGP can be in the control | |
236 | * of user space (i.e. i810 driver). So this loop will get | |
237 | * skipped and we double check that dev->agp->memory is | |
238 | * actually set as well as being invalid before EPERM'ing | |
239 | */ | |
240 | for (entry = dev->agp->memory; entry; entry = entry->next) { | |
241 | if ((map->offset >= entry->bound) && | |
242 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
243 | valid = 1; | |
244 | break; | |
245 | } | |
1da177e4 | 246 | } |
54ba2f76 DA |
247 | if (dev->agp->memory && !valid) { |
248 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
249 | return -EPERM; | |
250 | } | |
251 | DRM_DEBUG("AGP offset = 0x%08lx, size = 0x%08lx\n", map->offset, map->size); | |
252 | ||
1da177e4 | 253 | break; |
54ba2f76 | 254 | } |
1da177e4 LT |
255 | case _DRM_SCATTER_GATHER: |
256 | if (!dev->sg) { | |
257 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
258 | return -EINVAL; | |
259 | } | |
d1f2b55a | 260 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 261 | break; |
b5e89ed5 | 262 | case _DRM_CONSISTENT: |
2d0f9eaf | 263 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 264 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
265 | * casting it down to 32 bits is no problem, but we |
266 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
267 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
268 | if (!dmah) { | |
2d0f9eaf DA |
269 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
270 | return -ENOMEM; | |
271 | } | |
9c8da5eb DA |
272 | map->handle = dmah->vaddr; |
273 | map->offset = (unsigned long)dmah->busaddr; | |
274 | kfree(dmah); | |
2d0f9eaf | 275 | break; |
1da177e4 | 276 | default: |
b5e89ed5 | 277 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
278 | return -EINVAL; |
279 | } | |
280 | ||
281 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); | |
b5e89ed5 | 282 | if (!list) { |
85abb3f9 | 283 | if (map->type == _DRM_REGISTERS) |
004a7727 | 284 | iounmap(map->handle); |
1da177e4 LT |
285 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
286 | return -EINVAL; | |
287 | } | |
288 | memset(list, 0, sizeof(*list)); | |
289 | list->map = map; | |
290 | ||
30e2fb18 | 291 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 292 | list_add(&list->head, &dev->maplist->head); |
8d153f71 | 293 | |
d1f2b55a | 294 | /* Assign a 32-bit handle */ |
30e2fb18 | 295 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
296 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
297 | map->offset; | |
a1d0fcf5 | 298 | ret = drm_map_handle(dev, &list->hash, user_token, 0); |
8d153f71 | 299 | if (ret) { |
85abb3f9 | 300 | if (map->type == _DRM_REGISTERS) |
004a7727 | 301 | iounmap(map->handle); |
8d153f71 TH |
302 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
303 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); | |
304 | mutex_unlock(&dev->struct_mutex); | |
305 | return ret; | |
306 | } | |
307 | ||
1545085a | 308 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 309 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 310 | |
89625eb1 | 311 | *maplist = list; |
7ab98401 | 312 | return 0; |
54ba2f76 | 313 | } |
89625eb1 | 314 | |
b5e89ed5 | 315 | int drm_addmap(drm_device_t * dev, unsigned int offset, |
89625eb1 | 316 | unsigned int size, drm_map_type_t type, |
b5e89ed5 | 317 | drm_map_flags_t flags, drm_local_map_t ** map_ptr) |
89625eb1 DA |
318 | { |
319 | drm_map_list_t *list; | |
320 | int rc; | |
321 | ||
322 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
323 | if (!rc) | |
324 | *map_ptr = list->map; | |
325 | return rc; | |
326 | } | |
b5e89ed5 | 327 | |
7ab98401 DA |
328 | EXPORT_SYMBOL(drm_addmap); |
329 | ||
330 | int drm_addmap_ioctl(struct inode *inode, struct file *filp, | |
331 | unsigned int cmd, unsigned long arg) | |
332 | { | |
333 | drm_file_t *priv = filp->private_data; | |
334 | drm_device_t *dev = priv->head->dev; | |
335 | drm_map_t map; | |
89625eb1 | 336 | drm_map_list_t *maplist; |
7ab98401 DA |
337 | drm_map_t __user *argp = (void __user *)arg; |
338 | int err; | |
339 | ||
340 | if (!(filp->f_mode & 3)) | |
341 | return -EACCES; /* Require read/write */ | |
342 | ||
b5e89ed5 | 343 | if (copy_from_user(&map, argp, sizeof(map))) { |
1da177e4 | 344 | return -EFAULT; |
7ab98401 DA |
345 | } |
346 | ||
d985c108 DA |
347 | if (!(capable(CAP_SYS_ADMIN) || map.type == _DRM_AGP)) |
348 | return -EPERM; | |
349 | ||
89625eb1 DA |
350 | err = drm_addmap_core(dev, map.offset, map.size, map.type, map.flags, |
351 | &maplist); | |
7ab98401 | 352 | |
b5e89ed5 | 353 | if (err) |
7ab98401 | 354 | return err; |
d1f2b55a | 355 | |
89625eb1 | 356 | if (copy_to_user(argp, maplist->map, sizeof(drm_map_t))) |
d1f2b55a | 357 | return -EFAULT; |
67e1a014 DA |
358 | |
359 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ | |
360 | if (put_user((void *)(unsigned long)maplist->user_token, &argp->handle)) | |
d1f2b55a | 361 | return -EFAULT; |
1da177e4 | 362 | return 0; |
88f399cd | 363 | } |
1da177e4 | 364 | |
1da177e4 LT |
365 | /** |
366 | * Remove a map private from list and deallocate resources if the mapping | |
367 | * isn't in use. | |
368 | * | |
369 | * \param inode device inode. | |
370 | * \param filp file pointer. | |
371 | * \param cmd command. | |
372 | * \param arg pointer to a drm_map_t structure. | |
373 | * \return zero on success or a negative value on error. | |
374 | * | |
375 | * Searches the map on drm_device::maplist, removes it from the list, see if | |
376 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
377 | * being on use. | |
378 | * | |
7ab98401 | 379 | * \sa drm_addmap |
1da177e4 | 380 | */ |
d985c108 | 381 | int drm_rmmap_locked(drm_device_t *dev, drm_local_map_t *map) |
1da177e4 | 382 | { |
1da177e4 LT |
383 | struct list_head *list; |
384 | drm_map_list_t *r_list = NULL; | |
836cf046 | 385 | drm_dma_handle_t dmah; |
1da177e4 | 386 | |
836cf046 | 387 | /* Find the list entry for the map and remove it */ |
1da177e4 LT |
388 | list_for_each(list, &dev->maplist->head) { |
389 | r_list = list_entry(list, drm_map_list_t, head); | |
390 | ||
836cf046 DA |
391 | if (r_list->map == map) { |
392 | list_del(list); | |
1545085a TH |
393 | drm_ht_remove_key(&dev->map_hash, |
394 | r_list->user_token >> PAGE_SHIFT); | |
836cf046 DA |
395 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); |
396 | break; | |
397 | } | |
1da177e4 LT |
398 | } |
399 | ||
836cf046 DA |
400 | /* List has wrapped around to the head pointer, or it's empty and we |
401 | * didn't find anything. | |
1da177e4 | 402 | */ |
836cf046 | 403 | if (list == (&dev->maplist->head)) { |
1da177e4 LT |
404 | return -EINVAL; |
405 | } | |
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 | |
d985c108 | 436 | int drm_rmmap(drm_device_t *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 | { | |
459 | drm_file_t *priv = filp->private_data; | |
460 | drm_device_t *dev = priv->head->dev; | |
461 | drm_map_t request; | |
836cf046 DA |
462 | drm_local_map_t *map = NULL; |
463 | struct list_head *list; | |
464 | int ret; | |
7ab98401 | 465 | |
b5e89ed5 | 466 | if (copy_from_user(&request, (drm_map_t __user *) arg, sizeof(request))) { |
7ab98401 DA |
467 | return -EFAULT; |
468 | } | |
469 | ||
30e2fb18 | 470 | mutex_lock(&dev->struct_mutex); |
836cf046 DA |
471 | list_for_each(list, &dev->maplist->head) { |
472 | drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head); | |
473 | ||
474 | if (r_list->map && | |
b5e89ed5 | 475 | r_list->user_token == (unsigned long)request.handle && |
836cf046 DA |
476 | r_list->map->flags & _DRM_REMOVABLE) { |
477 | map = r_list->map; | |
478 | break; | |
479 | } | |
480 | } | |
481 | ||
482 | /* List has wrapped around to the head pointer, or its empty we didn't | |
483 | * find anything. | |
484 | */ | |
485 | if (list == (&dev->maplist->head)) { | |
30e2fb18 | 486 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
487 | return -EINVAL; |
488 | } | |
489 | ||
7a3f1f21 TH |
490 | if (!map) { |
491 | mutex_unlock(&dev->struct_mutex); | |
836cf046 | 492 | return -EINVAL; |
7a3f1f21 | 493 | } |
836cf046 DA |
494 | |
495 | /* Register and framebuffer maps are permanent */ | |
496 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 497 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
498 | return 0; |
499 | } | |
500 | ||
501 | ret = drm_rmmap_locked(dev, map); | |
502 | ||
30e2fb18 | 503 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
504 | |
505 | return ret; | |
7ab98401 | 506 | } |
1da177e4 LT |
507 | |
508 | /** | |
509 | * Cleanup after an error on one of the addbufs() functions. | |
510 | * | |
836cf046 | 511 | * \param dev DRM device. |
1da177e4 LT |
512 | * \param entry buffer entry where the error occurred. |
513 | * | |
514 | * Frees any pages and buffers associated with the given entry. | |
515 | */ | |
b5e89ed5 | 516 | static void drm_cleanup_buf_error(drm_device_t * dev, drm_buf_entry_t * entry) |
1da177e4 LT |
517 | { |
518 | int i; | |
519 | ||
520 | if (entry->seg_count) { | |
521 | for (i = 0; i < entry->seg_count; i++) { | |
522 | if (entry->seglist[i]) { | |
ddf19b97 | 523 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
524 | } |
525 | } | |
526 | drm_free(entry->seglist, | |
b5e89ed5 DA |
527 | entry->seg_count * |
528 | sizeof(*entry->seglist), DRM_MEM_SEGS); | |
1da177e4 LT |
529 | |
530 | entry->seg_count = 0; | |
531 | } | |
532 | ||
b5e89ed5 DA |
533 | if (entry->buf_count) { |
534 | for (i = 0; i < entry->buf_count; i++) { | |
1da177e4 LT |
535 | if (entry->buflist[i].dev_private) { |
536 | drm_free(entry->buflist[i].dev_private, | |
b5e89ed5 DA |
537 | entry->buflist[i].dev_priv_size, |
538 | DRM_MEM_BUFS); | |
1da177e4 LT |
539 | } |
540 | } | |
541 | drm_free(entry->buflist, | |
b5e89ed5 DA |
542 | entry->buf_count * |
543 | sizeof(*entry->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
544 | |
545 | entry->buf_count = 0; | |
546 | } | |
547 | } | |
548 | ||
549 | #if __OS_HAS_AGP | |
550 | /** | |
d59431bf | 551 | * Add AGP buffers for DMA transfers. |
1da177e4 | 552 | * |
d59431bf DA |
553 | * \param dev drm_device_t to which the buffers are to be added. |
554 | * \param request pointer to a drm_buf_desc_t describing the request. | |
1da177e4 | 555 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 556 | * |
1da177e4 LT |
557 | * After some sanity checks creates a drm_buf structure for each buffer and |
558 | * reallocates the buffer list of the same size order to accommodate the new | |
559 | * buffers. | |
560 | */ | |
b5e89ed5 | 561 | int drm_addbufs_agp(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 562 | { |
1da177e4 | 563 | drm_device_dma_t *dma = dev->dma; |
1da177e4 | 564 | drm_buf_entry_t *entry; |
54ba2f76 | 565 | drm_agp_mem_t *agp_entry; |
1da177e4 LT |
566 | drm_buf_t *buf; |
567 | unsigned long offset; | |
568 | unsigned long agp_offset; | |
569 | int count; | |
570 | int order; | |
571 | int size; | |
572 | int alignment; | |
573 | int page_order; | |
574 | int total; | |
575 | int byte_count; | |
54ba2f76 | 576 | int i, valid; |
1da177e4 | 577 | drm_buf_t **temp_buflist; |
1da177e4 | 578 | |
b5e89ed5 DA |
579 | if (!dma) |
580 | return -EINVAL; | |
1da177e4 | 581 | |
d59431bf DA |
582 | count = request->count; |
583 | order = drm_order(request->size); | |
1da177e4 LT |
584 | size = 1 << order; |
585 | ||
b5e89ed5 DA |
586 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
587 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
588 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
589 | total = PAGE_SIZE << page_order; | |
590 | ||
591 | byte_count = 0; | |
d59431bf | 592 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 593 | |
b5e89ed5 DA |
594 | DRM_DEBUG("count: %d\n", count); |
595 | DRM_DEBUG("order: %d\n", order); | |
596 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 597 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
598 | DRM_DEBUG("alignment: %d\n", alignment); |
599 | DRM_DEBUG("page_order: %d\n", page_order); | |
600 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 601 | |
b5e89ed5 DA |
602 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
603 | return -EINVAL; | |
604 | if (dev->queue_count) | |
605 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 606 | |
54ba2f76 DA |
607 | /* Make sure buffers are located in AGP memory that we own */ |
608 | valid = 0; | |
609 | for (agp_entry = dev->agp->memory; agp_entry; agp_entry = agp_entry->next) { | |
610 | if ((agp_offset >= agp_entry->bound) && | |
611 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
612 | valid = 1; | |
613 | break; | |
614 | } | |
615 | } | |
616 | if (dev->agp->memory && !valid) { | |
617 | DRM_DEBUG("zone invalid\n"); | |
618 | return -EINVAL; | |
619 | } | |
b5e89ed5 DA |
620 | spin_lock(&dev->count_lock); |
621 | if (dev->buf_use) { | |
622 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
623 | return -EBUSY; |
624 | } | |
b5e89ed5 DA |
625 | atomic_inc(&dev->buf_alloc); |
626 | spin_unlock(&dev->count_lock); | |
1da177e4 | 627 | |
30e2fb18 | 628 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 629 | entry = &dma->bufs[order]; |
b5e89ed5 | 630 | if (entry->buf_count) { |
30e2fb18 | 631 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
632 | atomic_dec(&dev->buf_alloc); |
633 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
634 | } |
635 | ||
636 | if (count < 0 || count > 4096) { | |
30e2fb18 | 637 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 638 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
639 | return -EINVAL; |
640 | } | |
641 | ||
b5e89ed5 DA |
642 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
643 | DRM_MEM_BUFS); | |
644 | if (!entry->buflist) { | |
30e2fb18 | 645 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 646 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
647 | return -ENOMEM; |
648 | } | |
b5e89ed5 | 649 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
650 | |
651 | entry->buf_size = size; | |
652 | entry->page_order = page_order; | |
653 | ||
654 | offset = 0; | |
655 | ||
b5e89ed5 DA |
656 | while (entry->buf_count < count) { |
657 | buf = &entry->buflist[entry->buf_count]; | |
658 | buf->idx = dma->buf_count + entry->buf_count; | |
659 | buf->total = alignment; | |
660 | buf->order = order; | |
661 | buf->used = 0; | |
1da177e4 | 662 | |
b5e89ed5 | 663 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
664 | buf->bus_address = agp_offset + offset; |
665 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 666 | buf->next = NULL; |
1da177e4 LT |
667 | buf->waiting = 0; |
668 | buf->pending = 0; | |
b5e89ed5 DA |
669 | init_waitqueue_head(&buf->dma_wait); |
670 | buf->filp = NULL; | |
1da177e4 LT |
671 | |
672 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
673 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
674 | if (!buf->dev_private) { | |
1da177e4 LT |
675 | /* Set count correctly so we free the proper amount. */ |
676 | entry->buf_count = count; | |
b5e89ed5 | 677 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 678 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 679 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
680 | return -ENOMEM; |
681 | } | |
b5e89ed5 | 682 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 683 | |
b5e89ed5 | 684 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
685 | |
686 | offset += alignment; | |
687 | entry->buf_count++; | |
688 | byte_count += PAGE_SIZE << page_order; | |
689 | } | |
690 | ||
b5e89ed5 | 691 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 692 | |
b5e89ed5 DA |
693 | temp_buflist = drm_realloc(dma->buflist, |
694 | dma->buf_count * sizeof(*dma->buflist), | |
695 | (dma->buf_count + entry->buf_count) | |
696 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
697 | if (!temp_buflist) { | |
1da177e4 | 698 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 699 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 700 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 701 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
702 | return -ENOMEM; |
703 | } | |
704 | dma->buflist = temp_buflist; | |
705 | ||
b5e89ed5 | 706 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
707 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
708 | } | |
709 | ||
710 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
711 | dma->seg_count += entry->seg_count; |
712 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
713 | dma->byte_count += byte_count; |
714 | ||
b5e89ed5 DA |
715 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
716 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 717 | |
30e2fb18 | 718 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 719 | |
d59431bf DA |
720 | request->count = entry->buf_count; |
721 | request->size = size; | |
1da177e4 LT |
722 | |
723 | dma->flags = _DRM_DMA_USE_AGP; | |
724 | ||
b5e89ed5 | 725 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
726 | return 0; |
727 | } | |
d84f76d3 | 728 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 729 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 730 | |
b5e89ed5 | 731 | int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 732 | { |
1da177e4 | 733 | drm_device_dma_t *dma = dev->dma; |
1da177e4 LT |
734 | int count; |
735 | int order; | |
736 | int size; | |
737 | int total; | |
738 | int page_order; | |
739 | drm_buf_entry_t *entry; | |
ddf19b97 | 740 | drm_dma_handle_t *dmah; |
1da177e4 LT |
741 | drm_buf_t *buf; |
742 | int alignment; | |
743 | unsigned long offset; | |
744 | int i; | |
745 | int byte_count; | |
746 | int page_count; | |
747 | unsigned long *temp_pagelist; | |
748 | drm_buf_t **temp_buflist; | |
1da177e4 | 749 | |
b5e89ed5 DA |
750 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
751 | return -EINVAL; | |
d985c108 | 752 | |
b5e89ed5 DA |
753 | if (!dma) |
754 | return -EINVAL; | |
1da177e4 | 755 | |
d985c108 DA |
756 | if (!capable(CAP_SYS_ADMIN)) |
757 | return -EPERM; | |
758 | ||
d59431bf DA |
759 | count = request->count; |
760 | order = drm_order(request->size); | |
1da177e4 LT |
761 | size = 1 << order; |
762 | ||
b5e89ed5 DA |
763 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
764 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 765 | |
b5e89ed5 DA |
766 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
767 | return -EINVAL; | |
768 | if (dev->queue_count) | |
769 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 770 | |
d59431bf | 771 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 772 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
773 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
774 | total = PAGE_SIZE << page_order; | |
775 | ||
b5e89ed5 DA |
776 | spin_lock(&dev->count_lock); |
777 | if (dev->buf_use) { | |
778 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
779 | return -EBUSY; |
780 | } | |
b5e89ed5 DA |
781 | atomic_inc(&dev->buf_alloc); |
782 | spin_unlock(&dev->count_lock); | |
1da177e4 | 783 | |
30e2fb18 | 784 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 785 | entry = &dma->bufs[order]; |
b5e89ed5 | 786 | if (entry->buf_count) { |
30e2fb18 | 787 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 788 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
789 | return -ENOMEM; /* May only call once for each order */ |
790 | } | |
791 | ||
792 | if (count < 0 || count > 4096) { | |
30e2fb18 | 793 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 794 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
795 | return -EINVAL; |
796 | } | |
797 | ||
b5e89ed5 DA |
798 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
799 | DRM_MEM_BUFS); | |
800 | if (!entry->buflist) { | |
30e2fb18 | 801 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 802 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
803 | return -ENOMEM; |
804 | } | |
b5e89ed5 DA |
805 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
806 | ||
807 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), | |
808 | DRM_MEM_SEGS); | |
809 | if (!entry->seglist) { | |
810 | drm_free(entry->buflist, | |
811 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
30e2fb18 | 812 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 813 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
814 | return -ENOMEM; |
815 | } | |
b5e89ed5 | 816 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
817 | |
818 | /* Keep the original pagelist until we know all the allocations | |
819 | * have succeeded | |
820 | */ | |
b5e89ed5 DA |
821 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
822 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
1da177e4 | 823 | if (!temp_pagelist) { |
b5e89ed5 DA |
824 | drm_free(entry->buflist, |
825 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
826 | drm_free(entry->seglist, | |
827 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); | |
30e2fb18 | 828 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 829 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
830 | return -ENOMEM; |
831 | } | |
832 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
833 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
834 | DRM_DEBUG("pagelist: %d entries\n", | |
835 | dma->page_count + (count << page_order)); | |
1da177e4 | 836 | |
b5e89ed5 | 837 | entry->buf_size = size; |
1da177e4 LT |
838 | entry->page_order = page_order; |
839 | byte_count = 0; | |
840 | page_count = 0; | |
841 | ||
b5e89ed5 | 842 | while (entry->buf_count < count) { |
ddf19b97 DA |
843 | |
844 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); | |
845 | ||
846 | if (!dmah) { | |
1da177e4 LT |
847 | /* Set count correctly so we free the proper amount. */ |
848 | entry->buf_count = count; | |
849 | entry->seg_count = count; | |
850 | drm_cleanup_buf_error(dev, entry); | |
b5e89ed5 DA |
851 | drm_free(temp_pagelist, |
852 | (dma->page_count + (count << page_order)) | |
853 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 854 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 855 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
856 | return -ENOMEM; |
857 | } | |
ddf19b97 | 858 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
859 | for (i = 0; i < (1 << page_order); i++) { |
860 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
861 | dma->page_count + page_count, | |
ddf19b97 | 862 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 863 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 864 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 865 | } |
b5e89ed5 DA |
866 | for (offset = 0; |
867 | offset + size <= total && entry->buf_count < count; | |
868 | offset += alignment, ++entry->buf_count) { | |
869 | buf = &entry->buflist[entry->buf_count]; | |
870 | buf->idx = dma->buf_count + entry->buf_count; | |
871 | buf->total = alignment; | |
872 | buf->order = order; | |
873 | buf->used = 0; | |
874 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
875 | buf->address = (void *)(dmah->vaddr + offset); |
876 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 877 | buf->next = NULL; |
1da177e4 LT |
878 | buf->waiting = 0; |
879 | buf->pending = 0; | |
b5e89ed5 DA |
880 | init_waitqueue_head(&buf->dma_wait); |
881 | buf->filp = NULL; | |
1da177e4 LT |
882 | |
883 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
884 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
885 | DRM_MEM_BUFS); | |
886 | if (!buf->dev_private) { | |
1da177e4 LT |
887 | /* Set count correctly so we free the proper amount. */ |
888 | entry->buf_count = count; | |
889 | entry->seg_count = count; | |
b5e89ed5 DA |
890 | drm_cleanup_buf_error(dev, entry); |
891 | drm_free(temp_pagelist, | |
892 | (dma->page_count + | |
893 | (count << page_order)) | |
894 | * sizeof(*dma->pagelist), | |
895 | DRM_MEM_PAGES); | |
30e2fb18 | 896 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 897 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
898 | return -ENOMEM; |
899 | } | |
b5e89ed5 | 900 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 901 | |
b5e89ed5 DA |
902 | DRM_DEBUG("buffer %d @ %p\n", |
903 | entry->buf_count, buf->address); | |
1da177e4 LT |
904 | } |
905 | byte_count += PAGE_SIZE << page_order; | |
906 | } | |
907 | ||
b5e89ed5 DA |
908 | temp_buflist = drm_realloc(dma->buflist, |
909 | dma->buf_count * sizeof(*dma->buflist), | |
910 | (dma->buf_count + entry->buf_count) | |
911 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
912 | if (!temp_buflist) { |
913 | /* Free the entry because it isn't valid */ | |
b5e89ed5 DA |
914 | drm_cleanup_buf_error(dev, entry); |
915 | drm_free(temp_pagelist, | |
916 | (dma->page_count + (count << page_order)) | |
917 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 918 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 919 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
920 | return -ENOMEM; |
921 | } | |
922 | dma->buflist = temp_buflist; | |
923 | ||
b5e89ed5 | 924 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
925 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
926 | } | |
927 | ||
928 | /* No allocations failed, so now we can replace the orginal pagelist | |
929 | * with the new one. | |
930 | */ | |
931 | if (dma->page_count) { | |
932 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
933 | dma->page_count * sizeof(*dma->pagelist), |
934 | DRM_MEM_PAGES); | |
1da177e4 LT |
935 | } |
936 | dma->pagelist = temp_pagelist; | |
937 | ||
938 | dma->buf_count += entry->buf_count; | |
939 | dma->seg_count += entry->seg_count; | |
940 | dma->page_count += entry->seg_count << page_order; | |
941 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
942 | ||
30e2fb18 | 943 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 944 | |
d59431bf DA |
945 | request->count = entry->buf_count; |
946 | request->size = size; | |
1da177e4 | 947 | |
3417f33e GS |
948 | if (request->flags & _DRM_PCI_BUFFER_RO) |
949 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
950 | ||
b5e89ed5 | 951 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
952 | return 0; |
953 | ||
954 | } | |
d84f76d3 | 955 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 956 | |
b5e89ed5 | 957 | static int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 958 | { |
1da177e4 | 959 | drm_device_dma_t *dma = dev->dma; |
1da177e4 LT |
960 | drm_buf_entry_t *entry; |
961 | drm_buf_t *buf; | |
962 | unsigned long offset; | |
963 | unsigned long agp_offset; | |
964 | int count; | |
965 | int order; | |
966 | int size; | |
967 | int alignment; | |
968 | int page_order; | |
969 | int total; | |
970 | int byte_count; | |
971 | int i; | |
972 | drm_buf_t **temp_buflist; | |
973 | ||
b5e89ed5 DA |
974 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
975 | return -EINVAL; | |
976 | ||
977 | if (!dma) | |
978 | return -EINVAL; | |
1da177e4 | 979 | |
d985c108 DA |
980 | if (!capable(CAP_SYS_ADMIN)) |
981 | return -EPERM; | |
982 | ||
d59431bf DA |
983 | count = request->count; |
984 | order = drm_order(request->size); | |
1da177e4 LT |
985 | size = 1 << order; |
986 | ||
b5e89ed5 DA |
987 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
988 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
989 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
990 | total = PAGE_SIZE << page_order; | |
991 | ||
992 | byte_count = 0; | |
d59431bf | 993 | agp_offset = request->agp_start; |
1da177e4 | 994 | |
b5e89ed5 DA |
995 | DRM_DEBUG("count: %d\n", count); |
996 | DRM_DEBUG("order: %d\n", order); | |
997 | DRM_DEBUG("size: %d\n", size); | |
998 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
999 | DRM_DEBUG("alignment: %d\n", alignment); | |
1000 | DRM_DEBUG("page_order: %d\n", page_order); | |
1001 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1002 | |
b5e89ed5 DA |
1003 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1004 | return -EINVAL; | |
1005 | if (dev->queue_count) | |
1006 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1007 | |
b5e89ed5 DA |
1008 | spin_lock(&dev->count_lock); |
1009 | if (dev->buf_use) { | |
1010 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1011 | return -EBUSY; |
1012 | } | |
b5e89ed5 DA |
1013 | atomic_inc(&dev->buf_alloc); |
1014 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1015 | |
30e2fb18 | 1016 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1017 | entry = &dma->bufs[order]; |
b5e89ed5 | 1018 | if (entry->buf_count) { |
30e2fb18 | 1019 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1020 | atomic_dec(&dev->buf_alloc); |
1021 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1022 | } |
1023 | ||
1024 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1025 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1026 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1027 | return -EINVAL; |
1028 | } | |
1029 | ||
b5e89ed5 DA |
1030 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
1031 | DRM_MEM_BUFS); | |
1032 | if (!entry->buflist) { | |
30e2fb18 | 1033 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1034 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1035 | return -ENOMEM; |
1036 | } | |
b5e89ed5 | 1037 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
1038 | |
1039 | entry->buf_size = size; | |
1040 | entry->page_order = page_order; | |
1041 | ||
1042 | offset = 0; | |
1043 | ||
b5e89ed5 DA |
1044 | while (entry->buf_count < count) { |
1045 | buf = &entry->buflist[entry->buf_count]; | |
1046 | buf->idx = dma->buf_count + entry->buf_count; | |
1047 | buf->total = alignment; | |
1048 | buf->order = order; | |
1049 | buf->used = 0; | |
1da177e4 | 1050 | |
b5e89ed5 | 1051 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1052 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1053 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1054 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1055 | buf->next = NULL; |
1da177e4 LT |
1056 | buf->waiting = 0; |
1057 | buf->pending = 0; | |
b5e89ed5 DA |
1058 | init_waitqueue_head(&buf->dma_wait); |
1059 | buf->filp = NULL; | |
1da177e4 LT |
1060 | |
1061 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
1062 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
1063 | if (!buf->dev_private) { | |
1da177e4 LT |
1064 | /* Set count correctly so we free the proper amount. */ |
1065 | entry->buf_count = count; | |
b5e89ed5 | 1066 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1067 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1068 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1069 | return -ENOMEM; |
1070 | } | |
1071 | ||
b5e89ed5 | 1072 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1073 | |
b5e89ed5 | 1074 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1075 | |
1076 | offset += alignment; | |
1077 | entry->buf_count++; | |
1078 | byte_count += PAGE_SIZE << page_order; | |
1079 | } | |
1080 | ||
b5e89ed5 | 1081 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1082 | |
b5e89ed5 DA |
1083 | temp_buflist = drm_realloc(dma->buflist, |
1084 | dma->buf_count * sizeof(*dma->buflist), | |
1085 | (dma->buf_count + entry->buf_count) | |
1086 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1087 | if (!temp_buflist) { | |
1da177e4 | 1088 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1089 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1090 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1091 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1092 | return -ENOMEM; |
1093 | } | |
1094 | dma->buflist = temp_buflist; | |
1095 | ||
b5e89ed5 | 1096 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1097 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1098 | } | |
1099 | ||
1100 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1101 | dma->seg_count += entry->seg_count; |
1102 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1103 | dma->byte_count += byte_count; |
1104 | ||
b5e89ed5 DA |
1105 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1106 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1107 | |
30e2fb18 | 1108 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1109 | |
d59431bf DA |
1110 | request->count = entry->buf_count; |
1111 | request->size = size; | |
1da177e4 LT |
1112 | |
1113 | dma->flags = _DRM_DMA_USE_SG; | |
1114 | ||
b5e89ed5 | 1115 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1116 | return 0; |
1117 | } | |
1118 | ||
5d23fafb | 1119 | static int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request) |
b84397d6 | 1120 | { |
b84397d6 | 1121 | drm_device_dma_t *dma = dev->dma; |
b84397d6 DA |
1122 | drm_buf_entry_t *entry; |
1123 | drm_buf_t *buf; | |
1124 | unsigned long offset; | |
1125 | unsigned long agp_offset; | |
1126 | int count; | |
1127 | int order; | |
1128 | int size; | |
1129 | int alignment; | |
1130 | int page_order; | |
1131 | int total; | |
1132 | int byte_count; | |
1133 | int i; | |
1134 | drm_buf_t **temp_buflist; | |
b84397d6 DA |
1135 | |
1136 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1137 | return -EINVAL; | |
b5e89ed5 | 1138 | |
b84397d6 DA |
1139 | if (!dma) |
1140 | return -EINVAL; | |
1141 | ||
d985c108 DA |
1142 | if (!capable(CAP_SYS_ADMIN)) |
1143 | return -EPERM; | |
1144 | ||
d59431bf DA |
1145 | count = request->count; |
1146 | order = drm_order(request->size); | |
b84397d6 DA |
1147 | size = 1 << order; |
1148 | ||
d59431bf | 1149 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1150 | ? PAGE_ALIGN(size) : size; |
1151 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1152 | total = PAGE_SIZE << page_order; | |
1153 | ||
1154 | byte_count = 0; | |
d59431bf | 1155 | agp_offset = request->agp_start; |
b84397d6 DA |
1156 | |
1157 | DRM_DEBUG("count: %d\n", count); | |
1158 | DRM_DEBUG("order: %d\n", order); | |
1159 | DRM_DEBUG("size: %d\n", size); | |
1160 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1161 | DRM_DEBUG("alignment: %d\n", alignment); | |
1162 | DRM_DEBUG("page_order: %d\n", page_order); | |
1163 | DRM_DEBUG("total: %d\n", total); | |
1164 | ||
1165 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1166 | return -EINVAL; | |
1167 | if (dev->queue_count) | |
1168 | return -EBUSY; /* Not while in use */ | |
1169 | ||
1170 | spin_lock(&dev->count_lock); | |
1171 | if (dev->buf_use) { | |
1172 | spin_unlock(&dev->count_lock); | |
1173 | return -EBUSY; | |
1174 | } | |
1175 | atomic_inc(&dev->buf_alloc); | |
1176 | spin_unlock(&dev->count_lock); | |
1177 | ||
30e2fb18 | 1178 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1179 | entry = &dma->bufs[order]; |
1180 | if (entry->buf_count) { | |
30e2fb18 | 1181 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1182 | atomic_dec(&dev->buf_alloc); |
1183 | return -ENOMEM; /* May only call once for each order */ | |
1184 | } | |
1185 | ||
1186 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1187 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1188 | atomic_dec(&dev->buf_alloc); |
1189 | return -EINVAL; | |
1190 | } | |
1191 | ||
1192 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), | |
1193 | DRM_MEM_BUFS); | |
1194 | if (!entry->buflist) { | |
30e2fb18 | 1195 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1196 | atomic_dec(&dev->buf_alloc); |
1197 | return -ENOMEM; | |
1198 | } | |
1199 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1200 | ||
1201 | entry->buf_size = size; | |
1202 | entry->page_order = page_order; | |
1203 | ||
1204 | offset = 0; | |
1205 | ||
1206 | while (entry->buf_count < count) { | |
1207 | buf = &entry->buflist[entry->buf_count]; | |
1208 | buf->idx = dma->buf_count + entry->buf_count; | |
1209 | buf->total = alignment; | |
1210 | buf->order = order; | |
1211 | buf->used = 0; | |
1212 | ||
1213 | buf->offset = (dma->byte_count + offset); | |
1214 | buf->bus_address = agp_offset + offset; | |
1215 | buf->address = (void *)(agp_offset + offset); | |
1216 | buf->next = NULL; | |
1217 | buf->waiting = 0; | |
1218 | buf->pending = 0; | |
1219 | init_waitqueue_head(&buf->dma_wait); | |
1220 | buf->filp = NULL; | |
1221 | ||
1222 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
1223 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); | |
1224 | if (!buf->dev_private) { | |
1225 | /* Set count correctly so we free the proper amount. */ | |
1226 | entry->buf_count = count; | |
1227 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1228 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1229 | atomic_dec(&dev->buf_alloc); |
1230 | return -ENOMEM; | |
1231 | } | |
1232 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1233 | ||
1234 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1235 | ||
1236 | offset += alignment; | |
1237 | entry->buf_count++; | |
1238 | byte_count += PAGE_SIZE << page_order; | |
1239 | } | |
1240 | ||
1241 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1242 | ||
1243 | temp_buflist = drm_realloc(dma->buflist, | |
1244 | dma->buf_count * sizeof(*dma->buflist), | |
1245 | (dma->buf_count + entry->buf_count) | |
1246 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1247 | if (!temp_buflist) { | |
1248 | /* Free the entry because it isn't valid */ | |
1249 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1250 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1251 | atomic_dec(&dev->buf_alloc); |
1252 | return -ENOMEM; | |
1253 | } | |
1254 | dma->buflist = temp_buflist; | |
1255 | ||
1256 | for (i = 0; i < entry->buf_count; i++) { | |
1257 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1258 | } | |
1259 | ||
1260 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1261 | dma->seg_count += entry->seg_count; |
1262 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1263 | dma->byte_count += byte_count; |
1264 | ||
1265 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1266 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1267 | ||
30e2fb18 | 1268 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1269 | |
d59431bf DA |
1270 | request->count = entry->buf_count; |
1271 | request->size = size; | |
b84397d6 DA |
1272 | |
1273 | dma->flags = _DRM_DMA_USE_FB; | |
1274 | ||
1275 | atomic_dec(&dev->buf_alloc); | |
1276 | return 0; | |
1277 | } | |
d985c108 | 1278 | |
b84397d6 | 1279 | |
1da177e4 LT |
1280 | /** |
1281 | * Add buffers for DMA transfers (ioctl). | |
1282 | * | |
1283 | * \param inode device inode. | |
1284 | * \param filp file pointer. | |
1285 | * \param cmd command. | |
1286 | * \param arg pointer to a drm_buf_desc_t request. | |
1287 | * \return zero on success or a negative number on failure. | |
1288 | * | |
1289 | * According with the memory type specified in drm_buf_desc::flags and the | |
1290 | * build options, it dispatches the call either to addbufs_agp(), | |
1291 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1292 | * PCI memory respectively. | |
1293 | */ | |
b5e89ed5 DA |
1294 | int drm_addbufs(struct inode *inode, struct file *filp, |
1295 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1296 | { |
1297 | drm_buf_desc_t request; | |
1298 | drm_file_t *priv = filp->private_data; | |
1299 | drm_device_t *dev = priv->head->dev; | |
d59431bf | 1300 | int ret; |
b5e89ed5 | 1301 | |
1da177e4 LT |
1302 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1303 | return -EINVAL; | |
1304 | ||
b5e89ed5 DA |
1305 | if (copy_from_user(&request, (drm_buf_desc_t __user *) arg, |
1306 | sizeof(request))) | |
1da177e4 LT |
1307 | return -EFAULT; |
1308 | ||
1309 | #if __OS_HAS_AGP | |
b5e89ed5 DA |
1310 | if (request.flags & _DRM_AGP_BUFFER) |
1311 | ret = drm_addbufs_agp(dev, &request); | |
1da177e4 LT |
1312 | else |
1313 | #endif | |
b5e89ed5 DA |
1314 | if (request.flags & _DRM_SG_BUFFER) |
1315 | ret = drm_addbufs_sg(dev, &request); | |
1316 | else if (request.flags & _DRM_FB_BUFFER) | |
1317 | ret = drm_addbufs_fb(dev, &request); | |
1da177e4 | 1318 | else |
b5e89ed5 | 1319 | ret = drm_addbufs_pci(dev, &request); |
d59431bf | 1320 | |
b5e89ed5 DA |
1321 | if (ret == 0) { |
1322 | if (copy_to_user((void __user *)arg, &request, sizeof(request))) { | |
d59431bf DA |
1323 | ret = -EFAULT; |
1324 | } | |
1325 | } | |
1326 | return ret; | |
1da177e4 LT |
1327 | } |
1328 | ||
1da177e4 LT |
1329 | /** |
1330 | * Get information about the buffer mappings. | |
1331 | * | |
1332 | * This was originally mean for debugging purposes, or by a sophisticated | |
1333 | * client library to determine how best to use the available buffers (e.g., | |
1334 | * large buffers can be used for image transfer). | |
1335 | * | |
1336 | * \param inode device inode. | |
1337 | * \param filp file pointer. | |
1338 | * \param cmd command. | |
1339 | * \param arg pointer to a drm_buf_info structure. | |
1340 | * \return zero on success or a negative number on failure. | |
1341 | * | |
1342 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1343 | * lock, preventing of allocating more buffers after this call. Information | |
1344 | * about each requested buffer is then copied into user space. | |
1345 | */ | |
b5e89ed5 DA |
1346 | int drm_infobufs(struct inode *inode, struct file *filp, |
1347 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1348 | { |
1349 | drm_file_t *priv = filp->private_data; | |
1350 | drm_device_t *dev = priv->head->dev; | |
1351 | drm_device_dma_t *dma = dev->dma; | |
1352 | drm_buf_info_t request; | |
1353 | drm_buf_info_t __user *argp = (void __user *)arg; | |
1354 | int i; | |
1355 | int count; | |
1356 | ||
1357 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1358 | return -EINVAL; | |
1359 | ||
b5e89ed5 DA |
1360 | if (!dma) |
1361 | return -EINVAL; | |
1da177e4 | 1362 | |
b5e89ed5 DA |
1363 | spin_lock(&dev->count_lock); |
1364 | if (atomic_read(&dev->buf_alloc)) { | |
1365 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1366 | return -EBUSY; |
1367 | } | |
1368 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1369 | spin_unlock(&dev->count_lock); |
1da177e4 | 1370 | |
b5e89ed5 | 1371 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1372 | return -EFAULT; |
1373 | ||
b5e89ed5 DA |
1374 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1375 | if (dma->bufs[i].buf_count) | |
1376 | ++count; | |
1da177e4 LT |
1377 | } |
1378 | ||
b5e89ed5 | 1379 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1380 | |
b5e89ed5 DA |
1381 | if (request.count >= count) { |
1382 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { | |
1383 | if (dma->bufs[i].buf_count) { | |
1384 | drm_buf_desc_t __user *to = | |
1385 | &request.list[count]; | |
1da177e4 LT |
1386 | drm_buf_entry_t *from = &dma->bufs[i]; |
1387 | drm_freelist_t *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1388 | if (copy_to_user(&to->count, |
1389 | &from->buf_count, | |
1390 | sizeof(from->buf_count)) || | |
1391 | copy_to_user(&to->size, | |
1392 | &from->buf_size, | |
1393 | sizeof(from->buf_size)) || | |
1394 | copy_to_user(&to->low_mark, | |
1395 | &list->low_mark, | |
1396 | sizeof(list->low_mark)) || | |
1397 | copy_to_user(&to->high_mark, | |
1398 | &list->high_mark, | |
1399 | sizeof(list->high_mark))) | |
1da177e4 LT |
1400 | return -EFAULT; |
1401 | ||
b5e89ed5 DA |
1402 | DRM_DEBUG("%d %d %d %d %d\n", |
1403 | i, | |
1404 | dma->bufs[i].buf_count, | |
1405 | dma->bufs[i].buf_size, | |
1406 | dma->bufs[i].freelist.low_mark, | |
1407 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1408 | ++count; |
1409 | } | |
1410 | } | |
1411 | } | |
1412 | request.count = count; | |
1413 | ||
b5e89ed5 | 1414 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1415 | return -EFAULT; |
1416 | ||
1417 | return 0; | |
1418 | } | |
1419 | ||
1420 | /** | |
1421 | * Specifies a low and high water mark for buffer allocation | |
1422 | * | |
1423 | * \param inode device inode. | |
1424 | * \param filp file pointer. | |
1425 | * \param cmd command. | |
1426 | * \param arg a pointer to a drm_buf_desc structure. | |
1427 | * \return zero on success or a negative number on failure. | |
1428 | * | |
1429 | * Verifies that the size order is bounded between the admissible orders and | |
1430 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1431 | * | |
1432 | * \note This ioctl is deprecated and mostly never used. | |
1433 | */ | |
b5e89ed5 DA |
1434 | int drm_markbufs(struct inode *inode, struct file *filp, |
1435 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1436 | { |
1437 | drm_file_t *priv = filp->private_data; | |
1438 | drm_device_t *dev = priv->head->dev; | |
1439 | drm_device_dma_t *dma = dev->dma; | |
1440 | drm_buf_desc_t request; | |
1441 | int order; | |
1442 | drm_buf_entry_t *entry; | |
1443 | ||
1444 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1445 | return -EINVAL; | |
1446 | ||
b5e89ed5 DA |
1447 | if (!dma) |
1448 | return -EINVAL; | |
1da177e4 | 1449 | |
b5e89ed5 DA |
1450 | if (copy_from_user(&request, |
1451 | (drm_buf_desc_t __user *) arg, sizeof(request))) | |
1da177e4 LT |
1452 | return -EFAULT; |
1453 | ||
b5e89ed5 DA |
1454 | DRM_DEBUG("%d, %d, %d\n", |
1455 | request.size, request.low_mark, request.high_mark); | |
1456 | order = drm_order(request.size); | |
1457 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1458 | return -EINVAL; | |
1da177e4 LT |
1459 | entry = &dma->bufs[order]; |
1460 | ||
b5e89ed5 | 1461 | if (request.low_mark < 0 || request.low_mark > entry->buf_count) |
1da177e4 | 1462 | return -EINVAL; |
b5e89ed5 | 1463 | if (request.high_mark < 0 || request.high_mark > entry->buf_count) |
1da177e4 LT |
1464 | return -EINVAL; |
1465 | ||
b5e89ed5 | 1466 | entry->freelist.low_mark = request.low_mark; |
1da177e4 LT |
1467 | entry->freelist.high_mark = request.high_mark; |
1468 | ||
1469 | return 0; | |
1470 | } | |
1471 | ||
1472 | /** | |
b5e89ed5 | 1473 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1474 | * |
1475 | * \param inode device inode. | |
1476 | * \param filp file pointer. | |
1477 | * \param cmd command. | |
1478 | * \param arg pointer to a drm_buf_free structure. | |
1479 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1480 | * |
1da177e4 LT |
1481 | * Calls free_buffer() for each used buffer. |
1482 | * This function is primarily used for debugging. | |
1483 | */ | |
b5e89ed5 DA |
1484 | int drm_freebufs(struct inode *inode, struct file *filp, |
1485 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1486 | { |
1487 | drm_file_t *priv = filp->private_data; | |
1488 | drm_device_t *dev = priv->head->dev; | |
1489 | drm_device_dma_t *dma = dev->dma; | |
1490 | drm_buf_free_t request; | |
1491 | int i; | |
1492 | int idx; | |
1493 | drm_buf_t *buf; | |
1494 | ||
1495 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1496 | return -EINVAL; | |
1497 | ||
b5e89ed5 DA |
1498 | if (!dma) |
1499 | return -EINVAL; | |
1da177e4 | 1500 | |
b5e89ed5 DA |
1501 | if (copy_from_user(&request, |
1502 | (drm_buf_free_t __user *) arg, sizeof(request))) | |
1da177e4 LT |
1503 | return -EFAULT; |
1504 | ||
b5e89ed5 DA |
1505 | DRM_DEBUG("%d\n", request.count); |
1506 | for (i = 0; i < request.count; i++) { | |
1507 | if (copy_from_user(&idx, &request.list[i], sizeof(idx))) | |
1da177e4 | 1508 | return -EFAULT; |
b5e89ed5 DA |
1509 | if (idx < 0 || idx >= dma->buf_count) { |
1510 | DRM_ERROR("Index %d (of %d max)\n", | |
1511 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1512 | return -EINVAL; |
1513 | } | |
1514 | buf = dma->buflist[idx]; | |
b5e89ed5 DA |
1515 | if (buf->filp != filp) { |
1516 | DRM_ERROR("Process %d freeing buffer not owned\n", | |
1517 | current->pid); | |
1da177e4 LT |
1518 | return -EINVAL; |
1519 | } | |
b5e89ed5 | 1520 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1521 | } |
1522 | ||
1523 | return 0; | |
1524 | } | |
1525 | ||
1526 | /** | |
1527 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1528 | * | |
1529 | * \param inode device inode. | |
1530 | * \param filp file pointer. | |
1531 | * \param cmd command. | |
1532 | * \param arg pointer to a drm_buf_map structure. | |
1533 | * \return zero on success or a negative number on failure. | |
1534 | * | |
3417f33e GS |
1535 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1536 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1537 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1538 | * drm_mmap_dma(). | |
1da177e4 | 1539 | */ |
b5e89ed5 DA |
1540 | int drm_mapbufs(struct inode *inode, struct file *filp, |
1541 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1542 | { |
1543 | drm_file_t *priv = filp->private_data; | |
1544 | drm_device_t *dev = priv->head->dev; | |
1545 | drm_device_dma_t *dma = dev->dma; | |
1546 | drm_buf_map_t __user *argp = (void __user *)arg; | |
1547 | int retcode = 0; | |
1548 | const int zero = 0; | |
1549 | unsigned long virtual; | |
1550 | unsigned long address; | |
1551 | drm_buf_map_t request; | |
1552 | int i; | |
1553 | ||
1554 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1555 | return -EINVAL; | |
1556 | ||
b5e89ed5 DA |
1557 | if (!dma) |
1558 | return -EINVAL; | |
1da177e4 | 1559 | |
b5e89ed5 DA |
1560 | spin_lock(&dev->count_lock); |
1561 | if (atomic_read(&dev->buf_alloc)) { | |
1562 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1563 | return -EBUSY; |
1564 | } | |
1565 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1566 | spin_unlock(&dev->count_lock); |
1da177e4 | 1567 | |
b5e89ed5 | 1568 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1569 | return -EFAULT; |
1570 | ||
b5e89ed5 | 1571 | if (request.count >= dma->buf_count) { |
b84397d6 | 1572 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1573 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1574 | && (dma->flags & _DRM_DMA_USE_SG)) |
1575 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1576 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
1da177e4 | 1577 | drm_map_t *map = dev->agp_buffer_map; |
d1f2b55a | 1578 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1579 | |
b5e89ed5 | 1580 | if (!map) { |
1da177e4 LT |
1581 | retcode = -EINVAL; |
1582 | goto done; | |
1583 | } | |
1584 | ||
b5e89ed5 DA |
1585 | down_write(¤t->mm->mmap_sem); |
1586 | virtual = do_mmap(filp, 0, map->size, | |
1587 | PROT_READ | PROT_WRITE, | |
1588 | MAP_SHARED, token); | |
1589 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1590 | } else { |
b5e89ed5 DA |
1591 | down_write(¤t->mm->mmap_sem); |
1592 | virtual = do_mmap(filp, 0, dma->byte_count, | |
1593 | PROT_READ | PROT_WRITE, | |
1594 | MAP_SHARED, 0); | |
1595 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1596 | } |
b5e89ed5 | 1597 | if (virtual > -1024UL) { |
1da177e4 LT |
1598 | /* Real error */ |
1599 | retcode = (signed long)virtual; | |
1600 | goto done; | |
1601 | } | |
1602 | request.virtual = (void __user *)virtual; | |
1603 | ||
b5e89ed5 DA |
1604 | for (i = 0; i < dma->buf_count; i++) { |
1605 | if (copy_to_user(&request.list[i].idx, | |
1606 | &dma->buflist[i]->idx, | |
1607 | sizeof(request.list[0].idx))) { | |
1da177e4 LT |
1608 | retcode = -EFAULT; |
1609 | goto done; | |
1610 | } | |
b5e89ed5 DA |
1611 | if (copy_to_user(&request.list[i].total, |
1612 | &dma->buflist[i]->total, | |
1613 | sizeof(request.list[0].total))) { | |
1da177e4 LT |
1614 | retcode = -EFAULT; |
1615 | goto done; | |
1616 | } | |
b5e89ed5 DA |
1617 | if (copy_to_user(&request.list[i].used, |
1618 | &zero, sizeof(zero))) { | |
1da177e4 LT |
1619 | retcode = -EFAULT; |
1620 | goto done; | |
1621 | } | |
b5e89ed5 DA |
1622 | address = virtual + dma->buflist[i]->offset; /* *** */ |
1623 | if (copy_to_user(&request.list[i].address, | |
1624 | &address, sizeof(address))) { | |
1da177e4 LT |
1625 | retcode = -EFAULT; |
1626 | goto done; | |
1627 | } | |
1628 | } | |
1629 | } | |
b5e89ed5 | 1630 | done: |
1da177e4 | 1631 | request.count = dma->buf_count; |
b5e89ed5 | 1632 | DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode); |
1da177e4 | 1633 | |
b5e89ed5 | 1634 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1635 | return -EFAULT; |
1636 | ||
1637 | return retcode; | |
1638 | } | |
1639 | ||
836cf046 DA |
1640 | /** |
1641 | * Compute size order. Returns the exponent of the smaller power of two which | |
1642 | * is greater or equal to given number. | |
b5e89ed5 | 1643 | * |
836cf046 DA |
1644 | * \param size size. |
1645 | * \return order. | |
1646 | * | |
1647 | * \todo Can be made faster. | |
1648 | */ | |
b5e89ed5 | 1649 | int drm_order(unsigned long size) |
836cf046 DA |
1650 | { |
1651 | int order; | |
1652 | unsigned long tmp; | |
1653 | ||
b5e89ed5 | 1654 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1655 | |
1656 | if (size & (size - 1)) | |
1657 | ++order; | |
1658 | ||
1659 | return order; | |
1660 | } | |
1661 | EXPORT_SYMBOL(drm_order); | |
d985c108 DA |
1662 | |
1663 |