Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_bufs.c |
1da177e4 | 3 | * Generic buffer template |
b5e89ed5 | 4 | * |
1da177e4 LT |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com | |
11 | * | |
12 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. | |
13 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
14 | * All Rights Reserved. | |
15 | * | |
16 | * Permission is hereby granted, free of charge, to any person obtaining a | |
17 | * copy of this software and associated documentation files (the "Software"), | |
18 | * to deal in the Software without restriction, including without limitation | |
19 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
20 | * and/or sell copies of the Software, and to permit persons to whom the | |
21 | * Software is furnished to do so, subject to the following conditions: | |
22 | * | |
23 | * The above copyright notice and this permission notice (including the next | |
24 | * paragraph) shall be included in all copies or substantial portions of the | |
25 | * Software. | |
26 | * | |
27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
28 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
29 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
30 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
31 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
32 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
33 | * OTHER DEALINGS IN THE SOFTWARE. | |
34 | */ | |
35 | ||
36 | #include <linux/vmalloc.h> | |
f1a2a9b6 DM |
37 | #include <linux/log2.h> |
38 | #include <asm/shmparam.h> | |
1da177e4 LT |
39 | #include "drmP.h" |
40 | ||
d883f7f1 | 41 | resource_size_t drm_get_resource_start(struct drm_device *dev, unsigned int resource) |
1da177e4 | 42 | { |
836cf046 DA |
43 | return pci_resource_start(dev->pdev, resource); |
44 | } | |
45 | EXPORT_SYMBOL(drm_get_resource_start); | |
1da177e4 | 46 | |
d883f7f1 | 47 | resource_size_t drm_get_resource_len(struct drm_device *dev, unsigned int resource) |
836cf046 DA |
48 | { |
49 | return pci_resource_len(dev->pdev, resource); | |
50 | } | |
b5e89ed5 | 51 | |
836cf046 | 52 | EXPORT_SYMBOL(drm_get_resource_len); |
1da177e4 | 53 | |
55910517 | 54 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
f77d390c | 55 | struct drm_local_map *map) |
836cf046 | 56 | { |
55910517 | 57 | struct drm_map_list *entry; |
bd1b331f | 58 | list_for_each_entry(entry, &dev->maplist, head) { |
41c2e75e BH |
59 | /* |
60 | * Because the kernel-userspace ABI is fixed at a 32-bit offset | |
61 | * while PCI resources may live above that, we ignore the map | |
62 | * offset for maps of type _DRM_FRAMEBUFFER or _DRM_REGISTERS. | |
63 | * It is assumed that each driver will have only one resource of | |
64 | * each type. | |
65 | */ | |
66 | if (!entry->map || | |
67 | map->type != entry->map->type || | |
68 | entry->master != dev->primary->master) | |
69 | continue; | |
70 | switch (map->type) { | |
71 | case _DRM_SHM: | |
72 | if (map->flags != _DRM_CONTAINS_LOCK) | |
73 | break; | |
74 | case _DRM_REGISTERS: | |
75 | case _DRM_FRAME_BUFFER: | |
89625eb1 | 76 | return entry; |
41c2e75e BH |
77 | default: /* Make gcc happy */ |
78 | ; | |
836cf046 | 79 | } |
41c2e75e BH |
80 | if (entry->map->offset == map->offset) |
81 | return entry; | |
836cf046 DA |
82 | } |
83 | ||
84 | return NULL; | |
1da177e4 | 85 | } |
1da177e4 | 86 | |
e0be428e | 87 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
f1a2a9b6 | 88 | unsigned long user_token, int hashed_handle, int shm) |
d1f2b55a | 89 | { |
f1a2a9b6 DM |
90 | int use_hashed_handle, shift; |
91 | unsigned long add; | |
92 | ||
c2604ce0 | 93 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
94 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
95 | #elif (BITS_PER_LONG == 32) | |
96 | use_hashed_handle = hashed_handle; | |
97 | #else | |
98 | #error Unsupported long size. Neither 64 nor 32 bits. | |
99 | #endif | |
d1f2b55a | 100 | |
e08870c8 TH |
101 | if (!use_hashed_handle) { |
102 | int ret; | |
1545085a | 103 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
104 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
105 | if (ret != -EINVAL) | |
106 | return ret; | |
d1f2b55a | 107 | } |
f1a2a9b6 DM |
108 | |
109 | shift = 0; | |
110 | add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT; | |
111 | if (shm && (SHMLBA > PAGE_SIZE)) { | |
112 | int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1; | |
113 | ||
114 | /* For shared memory, we have to preserve the SHMLBA | |
115 | * bits of the eventual vma->vm_pgoff value during | |
116 | * mmap(). Otherwise we run into cache aliasing problems | |
117 | * on some platforms. On these platforms, the pgoff of | |
118 | * a mmap() request is used to pick a suitable virtual | |
119 | * address for the mmap() region such that it will not | |
120 | * cause cache aliasing problems. | |
121 | * | |
122 | * Therefore, make sure the SHMLBA relevant bits of the | |
123 | * hash value we use are equal to those in the original | |
124 | * kernel virtual address. | |
125 | */ | |
126 | shift = bits; | |
127 | add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL)); | |
128 | } | |
129 | ||
e08870c8 TH |
130 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
131 | user_token, 32 - PAGE_SHIFT - 3, | |
f1a2a9b6 | 132 | shift, add); |
d1f2b55a | 133 | } |
9a186645 | 134 | |
1da177e4 | 135 | /** |
f77d390c BH |
136 | * Core function to create a range of memory available for mapping by a |
137 | * non-root process. | |
1da177e4 LT |
138 | * |
139 | * Adjusts the memory offset to its absolute value according to the mapping | |
140 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
141 | * applicable and if supported by the kernel. | |
142 | */ | |
41c2e75e | 143 | static int drm_addmap_core(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 144 | unsigned int size, enum drm_map_type type, |
55910517 DA |
145 | enum drm_map_flags flags, |
146 | struct drm_map_list ** maplist) | |
1da177e4 | 147 | { |
f77d390c | 148 | struct drm_local_map *map; |
55910517 | 149 | struct drm_map_list *list; |
9c8da5eb | 150 | drm_dma_handle_t *dmah; |
8d153f71 TH |
151 | unsigned long user_token; |
152 | int ret; | |
1da177e4 | 153 | |
b5e89ed5 DA |
154 | map = drm_alloc(sizeof(*map), DRM_MEM_MAPS); |
155 | if (!map) | |
1da177e4 LT |
156 | return -ENOMEM; |
157 | ||
7ab98401 DA |
158 | map->offset = offset; |
159 | map->size = size; | |
160 | map->flags = flags; | |
161 | map->type = type; | |
1da177e4 LT |
162 | |
163 | /* Only allow shared memory to be removable since we only keep enough | |
164 | * book keeping information about shared memory to allow for removal | |
165 | * when processes fork. | |
166 | */ | |
b5e89ed5 DA |
167 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
168 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
169 | return -EINVAL; |
170 | } | |
41c2e75e BH |
171 | DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n", |
172 | (unsigned long long)map->offset, map->size, map->type); | |
173 | if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) { | |
b5e89ed5 | 174 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
175 | return -EINVAL; |
176 | } | |
b5e89ed5 | 177 | map->mtrr = -1; |
1da177e4 LT |
178 | map->handle = NULL; |
179 | ||
b5e89ed5 | 180 | switch (map->type) { |
1da177e4 LT |
181 | case _DRM_REGISTERS: |
182 | case _DRM_FRAME_BUFFER: | |
88f399cd | 183 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) |
8d2ea625 | 184 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 DA |
185 | map->offset < virt_to_phys(high_memory)) { |
186 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
187 | return -EINVAL; |
188 | } | |
189 | #endif | |
190 | #ifdef __alpha__ | |
191 | map->offset += dev->hose->mem_space->start; | |
192 | #endif | |
836cf046 DA |
193 | /* Some drivers preinitialize some maps, without the X Server |
194 | * needing to be aware of it. Therefore, we just return success | |
195 | * when the server tries to create a duplicate map. | |
196 | */ | |
89625eb1 DA |
197 | list = drm_find_matching_map(dev, map); |
198 | if (list != NULL) { | |
199 | if (list->map->size != map->size) { | |
836cf046 | 200 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
201 | "mismatched sizes, (%ld vs %ld)\n", |
202 | map->type, map->size, | |
203 | list->map->size); | |
89625eb1 | 204 | list->map->size = map->size; |
836cf046 DA |
205 | } |
206 | ||
207 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
89625eb1 | 208 | *maplist = list; |
836cf046 DA |
209 | return 0; |
210 | } | |
211 | ||
1da177e4 | 212 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
213 | if (map->type == _DRM_FRAME_BUFFER || |
214 | (map->flags & _DRM_WRITE_COMBINING)) { | |
215 | map->mtrr = mtrr_add(map->offset, map->size, | |
216 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
217 | } |
218 | } | |
0769d39c | 219 | if (map->type == _DRM_REGISTERS) { |
004a7727 | 220 | map->handle = ioremap(map->offset, map->size); |
0769d39c ST |
221 | if (!map->handle) { |
222 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
223 | return -ENOMEM; | |
224 | } | |
225 | } | |
bc5f4523 | 226 | |
1da177e4 | 227 | break; |
1da177e4 | 228 | case _DRM_SHM: |
54ba2f76 DA |
229 | list = drm_find_matching_map(dev, map); |
230 | if (list != NULL) { | |
231 | if(list->map->size != map->size) { | |
232 | DRM_DEBUG("Matching maps of type %d with " | |
233 | "mismatched sizes, (%ld vs %ld)\n", | |
234 | map->type, map->size, list->map->size); | |
235 | list->map->size = map->size; | |
236 | } | |
237 | ||
238 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
239 | *maplist = list; | |
240 | return 0; | |
241 | } | |
f239b7b0 | 242 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
243 | DRM_DEBUG("%lu %d %p\n", |
244 | map->size, drm_order(map->size), map->handle); | |
245 | if (!map->handle) { | |
246 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
247 | return -ENOMEM; |
248 | } | |
249 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 250 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 251 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
7c1c2871 | 252 | if (dev->primary->master->lock.hw_lock != NULL) { |
b5e89ed5 DA |
253 | vfree(map->handle); |
254 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
255 | return -EBUSY; |
256 | } | |
7c1c2871 | 257 | dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
258 | } |
259 | break; | |
54ba2f76 | 260 | case _DRM_AGP: { |
55910517 | 261 | struct drm_agp_mem *entry; |
54ba2f76 DA |
262 | int valid = 0; |
263 | ||
264 | if (!drm_core_has_AGP(dev)) { | |
265 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
266 | return -EINVAL; | |
267 | } | |
1da177e4 | 268 | #ifdef __alpha__ |
54ba2f76 | 269 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 270 | #endif |
47a184a8 EA |
271 | /* In some cases (i810 driver), user space may have already |
272 | * added the AGP base itself, because dev->agp->base previously | |
273 | * only got set during AGP enable. So, only add the base | |
274 | * address if the map's offset isn't already within the | |
275 | * aperture. | |
54ba2f76 | 276 | */ |
47a184a8 EA |
277 | if (map->offset < dev->agp->base || |
278 | map->offset > dev->agp->base + | |
279 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
280 | map->offset += dev->agp->base; | |
281 | } | |
54ba2f76 DA |
282 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
283 | ||
284 | /* This assumes the DRM is in total control of AGP space. | |
285 | * It's not always the case as AGP can be in the control | |
286 | * of user space (i.e. i810 driver). So this loop will get | |
287 | * skipped and we double check that dev->agp->memory is | |
288 | * actually set as well as being invalid before EPERM'ing | |
289 | */ | |
bd1b331f | 290 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
291 | if ((map->offset >= entry->bound) && |
292 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
293 | valid = 1; | |
294 | break; | |
295 | } | |
1da177e4 | 296 | } |
bd1b331f | 297 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
298 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
299 | return -EPERM; | |
300 | } | |
41c2e75e BH |
301 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
302 | (unsigned long long)map->offset, map->size); | |
54ba2f76 | 303 | |
a2c0a97b JB |
304 | break; |
305 | case _DRM_GEM: | |
306 | DRM_ERROR("tried to rmmap GEM object\n"); | |
1da177e4 | 307 | break; |
54ba2f76 | 308 | } |
1da177e4 LT |
309 | case _DRM_SCATTER_GATHER: |
310 | if (!dev->sg) { | |
311 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
312 | return -EINVAL; | |
313 | } | |
d1f2b55a | 314 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 315 | break; |
b5e89ed5 | 316 | case _DRM_CONSISTENT: |
2d0f9eaf | 317 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 318 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
319 | * casting it down to 32 bits is no problem, but we |
320 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
321 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
322 | if (!dmah) { | |
2d0f9eaf DA |
323 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
324 | return -ENOMEM; | |
325 | } | |
9c8da5eb DA |
326 | map->handle = dmah->vaddr; |
327 | map->offset = (unsigned long)dmah->busaddr; | |
328 | kfree(dmah); | |
2d0f9eaf | 329 | break; |
1da177e4 | 330 | default: |
b5e89ed5 | 331 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
332 | return -EINVAL; |
333 | } | |
334 | ||
335 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); | |
b5e89ed5 | 336 | if (!list) { |
85abb3f9 | 337 | if (map->type == _DRM_REGISTERS) |
004a7727 | 338 | iounmap(map->handle); |
1da177e4 LT |
339 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
340 | return -EINVAL; | |
341 | } | |
342 | memset(list, 0, sizeof(*list)); | |
343 | list->map = map; | |
344 | ||
30e2fb18 | 345 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 346 | list_add(&list->head, &dev->maplist); |
8d153f71 | 347 | |
d1f2b55a | 348 | /* Assign a 32-bit handle */ |
30e2fb18 | 349 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
350 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
351 | map->offset; | |
f1a2a9b6 DM |
352 | ret = drm_map_handle(dev, &list->hash, user_token, 0, |
353 | (map->type == _DRM_SHM)); | |
8d153f71 | 354 | if (ret) { |
85abb3f9 | 355 | if (map->type == _DRM_REGISTERS) |
004a7727 | 356 | iounmap(map->handle); |
8d153f71 TH |
357 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
358 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); | |
359 | mutex_unlock(&dev->struct_mutex); | |
360 | return ret; | |
361 | } | |
362 | ||
1545085a | 363 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 364 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 365 | |
7c1c2871 | 366 | list->master = dev->primary->master; |
89625eb1 | 367 | *maplist = list; |
7ab98401 | 368 | return 0; |
54ba2f76 | 369 | } |
89625eb1 | 370 | |
41c2e75e | 371 | int drm_addmap(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 372 | unsigned int size, enum drm_map_type type, |
f77d390c | 373 | enum drm_map_flags flags, struct drm_local_map ** map_ptr) |
89625eb1 | 374 | { |
55910517 | 375 | struct drm_map_list *list; |
89625eb1 DA |
376 | int rc; |
377 | ||
378 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
379 | if (!rc) | |
380 | *map_ptr = list->map; | |
381 | return rc; | |
382 | } | |
b5e89ed5 | 383 | |
7ab98401 DA |
384 | EXPORT_SYMBOL(drm_addmap); |
385 | ||
f77d390c BH |
386 | /** |
387 | * Ioctl to specify a range of memory that is available for mapping by a | |
388 | * non-root process. | |
389 | * | |
390 | * \param inode device inode. | |
391 | * \param file_priv DRM file private. | |
392 | * \param cmd command. | |
393 | * \param arg pointer to a drm_map structure. | |
394 | * \return zero on success or a negative value on error. | |
395 | * | |
396 | */ | |
c153f45f EA |
397 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
398 | struct drm_file *file_priv) | |
7ab98401 | 399 | { |
c153f45f | 400 | struct drm_map *map = data; |
55910517 | 401 | struct drm_map_list *maplist; |
7ab98401 DA |
402 | int err; |
403 | ||
7c1c2871 | 404 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
405 | return -EPERM; |
406 | ||
c153f45f EA |
407 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
408 | map->flags, &maplist); | |
7ab98401 | 409 | |
b5e89ed5 | 410 | if (err) |
7ab98401 | 411 | return err; |
d1f2b55a | 412 | |
67e1a014 | 413 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 414 | map->handle = (void *)(unsigned long)maplist->user_token; |
1da177e4 | 415 | return 0; |
88f399cd | 416 | } |
1da177e4 | 417 | |
1da177e4 LT |
418 | /** |
419 | * Remove a map private from list and deallocate resources if the mapping | |
420 | * isn't in use. | |
421 | * | |
1da177e4 LT |
422 | * Searches the map on drm_device::maplist, removes it from the list, see if |
423 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
424 | * being on use. | |
425 | * | |
7ab98401 | 426 | * \sa drm_addmap |
1da177e4 | 427 | */ |
f77d390c | 428 | int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 429 | { |
55910517 | 430 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 431 | drm_dma_handle_t dmah; |
bd1b331f | 432 | int found = 0; |
7c1c2871 | 433 | struct drm_master *master; |
1da177e4 | 434 | |
836cf046 | 435 | /* Find the list entry for the map and remove it */ |
bd1b331f | 436 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 437 | if (r_list->map == map) { |
7c1c2871 | 438 | master = r_list->master; |
bd1b331f | 439 | list_del(&r_list->head); |
1545085a TH |
440 | drm_ht_remove_key(&dev->map_hash, |
441 | r_list->user_token >> PAGE_SHIFT); | |
bd1b331f DA |
442 | drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS); |
443 | found = 1; | |
836cf046 DA |
444 | break; |
445 | } | |
1da177e4 LT |
446 | } |
447 | ||
bd1b331f | 448 | if (!found) |
1da177e4 | 449 | return -EINVAL; |
1da177e4 | 450 | |
836cf046 DA |
451 | switch (map->type) { |
452 | case _DRM_REGISTERS: | |
004a7727 | 453 | iounmap(map->handle); |
836cf046 DA |
454 | /* FALLTHROUGH */ |
455 | case _DRM_FRAME_BUFFER: | |
456 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
457 | int retcode; | |
b5e89ed5 DA |
458 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
459 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 460 | } |
836cf046 DA |
461 | break; |
462 | case _DRM_SHM: | |
463 | vfree(map->handle); | |
7c1c2871 DA |
464 | if (master) { |
465 | if (dev->sigdata.lock == master->lock.hw_lock) | |
466 | dev->sigdata.lock = NULL; | |
467 | master->lock.hw_lock = NULL; /* SHM removed */ | |
468 | master->lock.file_priv = NULL; | |
171901d1 | 469 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 470 | } |
836cf046 DA |
471 | break; |
472 | case _DRM_AGP: | |
473 | case _DRM_SCATTER_GATHER: | |
474 | break; | |
475 | case _DRM_CONSISTENT: | |
476 | dmah.vaddr = map->handle; | |
477 | dmah.busaddr = map->offset; | |
478 | dmah.size = map->size; | |
479 | __drm_pci_free(dev, &dmah); | |
480 | break; | |
a2c0a97b JB |
481 | case _DRM_GEM: |
482 | DRM_ERROR("tried to rmmap GEM object\n"); | |
483 | break; | |
1da177e4 | 484 | } |
836cf046 DA |
485 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
486 | ||
1da177e4 LT |
487 | return 0; |
488 | } | |
4e74f36d | 489 | EXPORT_SYMBOL(drm_rmmap_locked); |
836cf046 | 490 | |
f77d390c | 491 | int drm_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 DA |
492 | { |
493 | int ret; | |
494 | ||
30e2fb18 | 495 | mutex_lock(&dev->struct_mutex); |
836cf046 | 496 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 497 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
498 | |
499 | return ret; | |
500 | } | |
ba8bbcf6 | 501 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 502 | |
836cf046 DA |
503 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
504 | * the last close of the device, and this is necessary for cleanup when things | |
505 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
506 | * like a pointless exercise since they're going away anyway. | |
507 | * | |
508 | * One use case might be after addmap is allowed for normal users for SHM and | |
509 | * gets used by drivers that the server doesn't need to care about. This seems | |
510 | * unlikely. | |
f77d390c BH |
511 | * |
512 | * \param inode device inode. | |
513 | * \param file_priv DRM file private. | |
514 | * \param cmd command. | |
515 | * \param arg pointer to a struct drm_map structure. | |
516 | * \return zero on success or a negative value on error. | |
836cf046 | 517 | */ |
c153f45f EA |
518 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
519 | struct drm_file *file_priv) | |
7ab98401 | 520 | { |
c153f45f | 521 | struct drm_map *request = data; |
f77d390c | 522 | struct drm_local_map *map = NULL; |
55910517 | 523 | struct drm_map_list *r_list; |
836cf046 | 524 | int ret; |
7ab98401 | 525 | |
30e2fb18 | 526 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 527 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 528 | if (r_list->map && |
c153f45f | 529 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
530 | r_list->map->flags & _DRM_REMOVABLE) { |
531 | map = r_list->map; | |
532 | break; | |
533 | } | |
534 | } | |
535 | ||
536 | /* List has wrapped around to the head pointer, or its empty we didn't | |
537 | * find anything. | |
538 | */ | |
bd1b331f | 539 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 540 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
541 | return -EINVAL; |
542 | } | |
543 | ||
836cf046 DA |
544 | /* Register and framebuffer maps are permanent */ |
545 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 546 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
547 | return 0; |
548 | } | |
549 | ||
550 | ret = drm_rmmap_locked(dev, map); | |
551 | ||
30e2fb18 | 552 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
553 | |
554 | return ret; | |
7ab98401 | 555 | } |
1da177e4 LT |
556 | |
557 | /** | |
558 | * Cleanup after an error on one of the addbufs() functions. | |
559 | * | |
836cf046 | 560 | * \param dev DRM device. |
1da177e4 LT |
561 | * \param entry buffer entry where the error occurred. |
562 | * | |
563 | * Frees any pages and buffers associated with the given entry. | |
564 | */ | |
cdd55a29 DA |
565 | static void drm_cleanup_buf_error(struct drm_device * dev, |
566 | struct drm_buf_entry * entry) | |
1da177e4 LT |
567 | { |
568 | int i; | |
569 | ||
570 | if (entry->seg_count) { | |
571 | for (i = 0; i < entry->seg_count; i++) { | |
572 | if (entry->seglist[i]) { | |
ddf19b97 | 573 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
574 | } |
575 | } | |
576 | drm_free(entry->seglist, | |
b5e89ed5 DA |
577 | entry->seg_count * |
578 | sizeof(*entry->seglist), DRM_MEM_SEGS); | |
1da177e4 LT |
579 | |
580 | entry->seg_count = 0; | |
581 | } | |
582 | ||
b5e89ed5 DA |
583 | if (entry->buf_count) { |
584 | for (i = 0; i < entry->buf_count; i++) { | |
1da177e4 LT |
585 | if (entry->buflist[i].dev_private) { |
586 | drm_free(entry->buflist[i].dev_private, | |
b5e89ed5 DA |
587 | entry->buflist[i].dev_priv_size, |
588 | DRM_MEM_BUFS); | |
1da177e4 LT |
589 | } |
590 | } | |
591 | drm_free(entry->buflist, | |
b5e89ed5 DA |
592 | entry->buf_count * |
593 | sizeof(*entry->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
594 | |
595 | entry->buf_count = 0; | |
596 | } | |
597 | } | |
598 | ||
599 | #if __OS_HAS_AGP | |
600 | /** | |
d59431bf | 601 | * Add AGP buffers for DMA transfers. |
1da177e4 | 602 | * |
84b1fd10 | 603 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 604 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 605 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 606 | * |
1da177e4 LT |
607 | * After some sanity checks creates a drm_buf structure for each buffer and |
608 | * reallocates the buffer list of the same size order to accommodate the new | |
609 | * buffers. | |
610 | */ | |
84b1fd10 | 611 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 612 | { |
cdd55a29 DA |
613 | struct drm_device_dma *dma = dev->dma; |
614 | struct drm_buf_entry *entry; | |
55910517 | 615 | struct drm_agp_mem *agp_entry; |
056219e2 | 616 | struct drm_buf *buf; |
1da177e4 LT |
617 | unsigned long offset; |
618 | unsigned long agp_offset; | |
619 | int count; | |
620 | int order; | |
621 | int size; | |
622 | int alignment; | |
623 | int page_order; | |
624 | int total; | |
625 | int byte_count; | |
54ba2f76 | 626 | int i, valid; |
056219e2 | 627 | struct drm_buf **temp_buflist; |
1da177e4 | 628 | |
b5e89ed5 DA |
629 | if (!dma) |
630 | return -EINVAL; | |
1da177e4 | 631 | |
d59431bf DA |
632 | count = request->count; |
633 | order = drm_order(request->size); | |
1da177e4 LT |
634 | size = 1 << order; |
635 | ||
b5e89ed5 DA |
636 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
637 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
638 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
639 | total = PAGE_SIZE << page_order; | |
640 | ||
641 | byte_count = 0; | |
d59431bf | 642 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 643 | |
b5e89ed5 DA |
644 | DRM_DEBUG("count: %d\n", count); |
645 | DRM_DEBUG("order: %d\n", order); | |
646 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 647 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
648 | DRM_DEBUG("alignment: %d\n", alignment); |
649 | DRM_DEBUG("page_order: %d\n", page_order); | |
650 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 651 | |
b5e89ed5 DA |
652 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
653 | return -EINVAL; | |
654 | if (dev->queue_count) | |
655 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 656 | |
54ba2f76 DA |
657 | /* Make sure buffers are located in AGP memory that we own */ |
658 | valid = 0; | |
bd1b331f | 659 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
660 | if ((agp_offset >= agp_entry->bound) && |
661 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
662 | valid = 1; | |
663 | break; | |
664 | } | |
665 | } | |
bd1b331f | 666 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
667 | DRM_DEBUG("zone invalid\n"); |
668 | return -EINVAL; | |
669 | } | |
b5e89ed5 DA |
670 | spin_lock(&dev->count_lock); |
671 | if (dev->buf_use) { | |
672 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
673 | return -EBUSY; |
674 | } | |
b5e89ed5 DA |
675 | atomic_inc(&dev->buf_alloc); |
676 | spin_unlock(&dev->count_lock); | |
1da177e4 | 677 | |
30e2fb18 | 678 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 679 | entry = &dma->bufs[order]; |
b5e89ed5 | 680 | if (entry->buf_count) { |
30e2fb18 | 681 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
682 | atomic_dec(&dev->buf_alloc); |
683 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
684 | } |
685 | ||
686 | if (count < 0 || count > 4096) { | |
30e2fb18 | 687 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 688 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
689 | return -EINVAL; |
690 | } | |
691 | ||
b5e89ed5 DA |
692 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
693 | DRM_MEM_BUFS); | |
694 | if (!entry->buflist) { | |
30e2fb18 | 695 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 696 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
697 | return -ENOMEM; |
698 | } | |
b5e89ed5 | 699 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
700 | |
701 | entry->buf_size = size; | |
702 | entry->page_order = page_order; | |
703 | ||
704 | offset = 0; | |
705 | ||
b5e89ed5 DA |
706 | while (entry->buf_count < count) { |
707 | buf = &entry->buflist[entry->buf_count]; | |
708 | buf->idx = dma->buf_count + entry->buf_count; | |
709 | buf->total = alignment; | |
710 | buf->order = order; | |
711 | buf->used = 0; | |
1da177e4 | 712 | |
b5e89ed5 | 713 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
714 | buf->bus_address = agp_offset + offset; |
715 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 716 | buf->next = NULL; |
1da177e4 LT |
717 | buf->waiting = 0; |
718 | buf->pending = 0; | |
b5e89ed5 | 719 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 720 | buf->file_priv = NULL; |
1da177e4 LT |
721 | |
722 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
723 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
724 | if (!buf->dev_private) { | |
1da177e4 LT |
725 | /* Set count correctly so we free the proper amount. */ |
726 | entry->buf_count = count; | |
b5e89ed5 | 727 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 728 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 729 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
730 | return -ENOMEM; |
731 | } | |
b5e89ed5 | 732 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 733 | |
b5e89ed5 | 734 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
735 | |
736 | offset += alignment; | |
737 | entry->buf_count++; | |
738 | byte_count += PAGE_SIZE << page_order; | |
739 | } | |
740 | ||
b5e89ed5 | 741 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 742 | |
b5e89ed5 DA |
743 | temp_buflist = drm_realloc(dma->buflist, |
744 | dma->buf_count * sizeof(*dma->buflist), | |
745 | (dma->buf_count + entry->buf_count) | |
746 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
747 | if (!temp_buflist) { | |
1da177e4 | 748 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 749 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 750 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 751 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
752 | return -ENOMEM; |
753 | } | |
754 | dma->buflist = temp_buflist; | |
755 | ||
b5e89ed5 | 756 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
757 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
758 | } | |
759 | ||
760 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
761 | dma->seg_count += entry->seg_count; |
762 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
763 | dma->byte_count += byte_count; |
764 | ||
b5e89ed5 DA |
765 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
766 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 767 | |
30e2fb18 | 768 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 769 | |
d59431bf DA |
770 | request->count = entry->buf_count; |
771 | request->size = size; | |
1da177e4 LT |
772 | |
773 | dma->flags = _DRM_DMA_USE_AGP; | |
774 | ||
b5e89ed5 | 775 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
776 | return 0; |
777 | } | |
d84f76d3 | 778 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 779 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 780 | |
84b1fd10 | 781 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 782 | { |
cdd55a29 | 783 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
784 | int count; |
785 | int order; | |
786 | int size; | |
787 | int total; | |
788 | int page_order; | |
cdd55a29 | 789 | struct drm_buf_entry *entry; |
ddf19b97 | 790 | drm_dma_handle_t *dmah; |
056219e2 | 791 | struct drm_buf *buf; |
1da177e4 LT |
792 | int alignment; |
793 | unsigned long offset; | |
794 | int i; | |
795 | int byte_count; | |
796 | int page_count; | |
797 | unsigned long *temp_pagelist; | |
056219e2 | 798 | struct drm_buf **temp_buflist; |
1da177e4 | 799 | |
b5e89ed5 DA |
800 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
801 | return -EINVAL; | |
d985c108 | 802 | |
b5e89ed5 DA |
803 | if (!dma) |
804 | return -EINVAL; | |
1da177e4 | 805 | |
d985c108 DA |
806 | if (!capable(CAP_SYS_ADMIN)) |
807 | return -EPERM; | |
808 | ||
d59431bf DA |
809 | count = request->count; |
810 | order = drm_order(request->size); | |
1da177e4 LT |
811 | size = 1 << order; |
812 | ||
b5e89ed5 DA |
813 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
814 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 815 | |
b5e89ed5 DA |
816 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
817 | return -EINVAL; | |
818 | if (dev->queue_count) | |
819 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 820 | |
d59431bf | 821 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 822 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
823 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
824 | total = PAGE_SIZE << page_order; | |
825 | ||
b5e89ed5 DA |
826 | spin_lock(&dev->count_lock); |
827 | if (dev->buf_use) { | |
828 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
829 | return -EBUSY; |
830 | } | |
b5e89ed5 DA |
831 | atomic_inc(&dev->buf_alloc); |
832 | spin_unlock(&dev->count_lock); | |
1da177e4 | 833 | |
30e2fb18 | 834 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 835 | entry = &dma->bufs[order]; |
b5e89ed5 | 836 | if (entry->buf_count) { |
30e2fb18 | 837 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 838 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
839 | return -ENOMEM; /* May only call once for each order */ |
840 | } | |
841 | ||
842 | if (count < 0 || count > 4096) { | |
30e2fb18 | 843 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 844 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
845 | return -EINVAL; |
846 | } | |
847 | ||
b5e89ed5 DA |
848 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
849 | DRM_MEM_BUFS); | |
850 | if (!entry->buflist) { | |
30e2fb18 | 851 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 852 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
853 | return -ENOMEM; |
854 | } | |
b5e89ed5 DA |
855 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
856 | ||
857 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), | |
858 | DRM_MEM_SEGS); | |
859 | if (!entry->seglist) { | |
860 | drm_free(entry->buflist, | |
861 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
30e2fb18 | 862 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 863 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
864 | return -ENOMEM; |
865 | } | |
b5e89ed5 | 866 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
867 | |
868 | /* Keep the original pagelist until we know all the allocations | |
869 | * have succeeded | |
870 | */ | |
b5e89ed5 DA |
871 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
872 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
1da177e4 | 873 | if (!temp_pagelist) { |
b5e89ed5 DA |
874 | drm_free(entry->buflist, |
875 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
876 | drm_free(entry->seglist, | |
877 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); | |
30e2fb18 | 878 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 879 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
880 | return -ENOMEM; |
881 | } | |
882 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
883 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
884 | DRM_DEBUG("pagelist: %d entries\n", | |
885 | dma->page_count + (count << page_order)); | |
1da177e4 | 886 | |
b5e89ed5 | 887 | entry->buf_size = size; |
1da177e4 LT |
888 | entry->page_order = page_order; |
889 | byte_count = 0; | |
890 | page_count = 0; | |
891 | ||
b5e89ed5 | 892 | while (entry->buf_count < count) { |
bc5f4523 | 893 | |
ddf19b97 | 894 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); |
bc5f4523 | 895 | |
ddf19b97 | 896 | if (!dmah) { |
1da177e4 LT |
897 | /* Set count correctly so we free the proper amount. */ |
898 | entry->buf_count = count; | |
899 | entry->seg_count = count; | |
900 | drm_cleanup_buf_error(dev, entry); | |
b5e89ed5 DA |
901 | drm_free(temp_pagelist, |
902 | (dma->page_count + (count << page_order)) | |
903 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 904 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 905 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
906 | return -ENOMEM; |
907 | } | |
ddf19b97 | 908 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
909 | for (i = 0; i < (1 << page_order); i++) { |
910 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
911 | dma->page_count + page_count, | |
ddf19b97 | 912 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 913 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 914 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 915 | } |
b5e89ed5 DA |
916 | for (offset = 0; |
917 | offset + size <= total && entry->buf_count < count; | |
918 | offset += alignment, ++entry->buf_count) { | |
919 | buf = &entry->buflist[entry->buf_count]; | |
920 | buf->idx = dma->buf_count + entry->buf_count; | |
921 | buf->total = alignment; | |
922 | buf->order = order; | |
923 | buf->used = 0; | |
924 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
925 | buf->address = (void *)(dmah->vaddr + offset); |
926 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 927 | buf->next = NULL; |
1da177e4 LT |
928 | buf->waiting = 0; |
929 | buf->pending = 0; | |
b5e89ed5 | 930 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 931 | buf->file_priv = NULL; |
1da177e4 LT |
932 | |
933 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
934 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
935 | DRM_MEM_BUFS); | |
936 | if (!buf->dev_private) { | |
1da177e4 LT |
937 | /* Set count correctly so we free the proper amount. */ |
938 | entry->buf_count = count; | |
939 | entry->seg_count = count; | |
b5e89ed5 DA |
940 | drm_cleanup_buf_error(dev, entry); |
941 | drm_free(temp_pagelist, | |
942 | (dma->page_count + | |
943 | (count << page_order)) | |
944 | * sizeof(*dma->pagelist), | |
945 | DRM_MEM_PAGES); | |
30e2fb18 | 946 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 947 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
948 | return -ENOMEM; |
949 | } | |
b5e89ed5 | 950 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 951 | |
b5e89ed5 DA |
952 | DRM_DEBUG("buffer %d @ %p\n", |
953 | entry->buf_count, buf->address); | |
1da177e4 LT |
954 | } |
955 | byte_count += PAGE_SIZE << page_order; | |
956 | } | |
957 | ||
b5e89ed5 DA |
958 | temp_buflist = drm_realloc(dma->buflist, |
959 | dma->buf_count * sizeof(*dma->buflist), | |
960 | (dma->buf_count + entry->buf_count) | |
961 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
962 | if (!temp_buflist) { |
963 | /* Free the entry because it isn't valid */ | |
b5e89ed5 DA |
964 | drm_cleanup_buf_error(dev, entry); |
965 | drm_free(temp_pagelist, | |
966 | (dma->page_count + (count << page_order)) | |
967 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 968 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 969 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
970 | return -ENOMEM; |
971 | } | |
972 | dma->buflist = temp_buflist; | |
973 | ||
b5e89ed5 | 974 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
975 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
976 | } | |
977 | ||
978 | /* No allocations failed, so now we can replace the orginal pagelist | |
979 | * with the new one. | |
980 | */ | |
981 | if (dma->page_count) { | |
982 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
983 | dma->page_count * sizeof(*dma->pagelist), |
984 | DRM_MEM_PAGES); | |
1da177e4 LT |
985 | } |
986 | dma->pagelist = temp_pagelist; | |
987 | ||
988 | dma->buf_count += entry->buf_count; | |
989 | dma->seg_count += entry->seg_count; | |
990 | dma->page_count += entry->seg_count << page_order; | |
991 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
992 | ||
30e2fb18 | 993 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 994 | |
d59431bf DA |
995 | request->count = entry->buf_count; |
996 | request->size = size; | |
1da177e4 | 997 | |
3417f33e GS |
998 | if (request->flags & _DRM_PCI_BUFFER_RO) |
999 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
1000 | ||
b5e89ed5 | 1001 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1002 | return 0; |
1003 | ||
1004 | } | |
d84f76d3 | 1005 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 1006 | |
84b1fd10 | 1007 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 1008 | { |
cdd55a29 DA |
1009 | struct drm_device_dma *dma = dev->dma; |
1010 | struct drm_buf_entry *entry; | |
056219e2 | 1011 | struct drm_buf *buf; |
1da177e4 LT |
1012 | unsigned long offset; |
1013 | unsigned long agp_offset; | |
1014 | int count; | |
1015 | int order; | |
1016 | int size; | |
1017 | int alignment; | |
1018 | int page_order; | |
1019 | int total; | |
1020 | int byte_count; | |
1021 | int i; | |
056219e2 | 1022 | struct drm_buf **temp_buflist; |
1da177e4 | 1023 | |
b5e89ed5 DA |
1024 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
1025 | return -EINVAL; | |
1026 | ||
1027 | if (!dma) | |
1028 | return -EINVAL; | |
1da177e4 | 1029 | |
d985c108 DA |
1030 | if (!capable(CAP_SYS_ADMIN)) |
1031 | return -EPERM; | |
1032 | ||
d59431bf DA |
1033 | count = request->count; |
1034 | order = drm_order(request->size); | |
1da177e4 LT |
1035 | size = 1 << order; |
1036 | ||
b5e89ed5 DA |
1037 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
1038 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
1039 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
1040 | total = PAGE_SIZE << page_order; | |
1041 | ||
1042 | byte_count = 0; | |
d59431bf | 1043 | agp_offset = request->agp_start; |
1da177e4 | 1044 | |
b5e89ed5 DA |
1045 | DRM_DEBUG("count: %d\n", count); |
1046 | DRM_DEBUG("order: %d\n", order); | |
1047 | DRM_DEBUG("size: %d\n", size); | |
1048 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1049 | DRM_DEBUG("alignment: %d\n", alignment); | |
1050 | DRM_DEBUG("page_order: %d\n", page_order); | |
1051 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1052 | |
b5e89ed5 DA |
1053 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1054 | return -EINVAL; | |
1055 | if (dev->queue_count) | |
1056 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1057 | |
b5e89ed5 DA |
1058 | spin_lock(&dev->count_lock); |
1059 | if (dev->buf_use) { | |
1060 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1061 | return -EBUSY; |
1062 | } | |
b5e89ed5 DA |
1063 | atomic_inc(&dev->buf_alloc); |
1064 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1065 | |
30e2fb18 | 1066 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1067 | entry = &dma->bufs[order]; |
b5e89ed5 | 1068 | if (entry->buf_count) { |
30e2fb18 | 1069 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1070 | atomic_dec(&dev->buf_alloc); |
1071 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1072 | } |
1073 | ||
1074 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1075 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1076 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1077 | return -EINVAL; |
1078 | } | |
1079 | ||
b5e89ed5 DA |
1080 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
1081 | DRM_MEM_BUFS); | |
1082 | if (!entry->buflist) { | |
30e2fb18 | 1083 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1084 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1085 | return -ENOMEM; |
1086 | } | |
b5e89ed5 | 1087 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
1088 | |
1089 | entry->buf_size = size; | |
1090 | entry->page_order = page_order; | |
1091 | ||
1092 | offset = 0; | |
1093 | ||
b5e89ed5 DA |
1094 | while (entry->buf_count < count) { |
1095 | buf = &entry->buflist[entry->buf_count]; | |
1096 | buf->idx = dma->buf_count + entry->buf_count; | |
1097 | buf->total = alignment; | |
1098 | buf->order = order; | |
1099 | buf->used = 0; | |
1da177e4 | 1100 | |
b5e89ed5 | 1101 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1102 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1103 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1104 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1105 | buf->next = NULL; |
1da177e4 LT |
1106 | buf->waiting = 0; |
1107 | buf->pending = 0; | |
b5e89ed5 | 1108 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 1109 | buf->file_priv = NULL; |
1da177e4 LT |
1110 | |
1111 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
1112 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
1113 | if (!buf->dev_private) { | |
1da177e4 LT |
1114 | /* Set count correctly so we free the proper amount. */ |
1115 | entry->buf_count = count; | |
b5e89ed5 | 1116 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1117 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1118 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1119 | return -ENOMEM; |
1120 | } | |
1121 | ||
b5e89ed5 | 1122 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1123 | |
b5e89ed5 | 1124 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1125 | |
1126 | offset += alignment; | |
1127 | entry->buf_count++; | |
1128 | byte_count += PAGE_SIZE << page_order; | |
1129 | } | |
1130 | ||
b5e89ed5 | 1131 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1132 | |
b5e89ed5 DA |
1133 | temp_buflist = drm_realloc(dma->buflist, |
1134 | dma->buf_count * sizeof(*dma->buflist), | |
1135 | (dma->buf_count + entry->buf_count) | |
1136 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1137 | if (!temp_buflist) { | |
1da177e4 | 1138 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1139 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1140 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1141 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1142 | return -ENOMEM; |
1143 | } | |
1144 | dma->buflist = temp_buflist; | |
1145 | ||
b5e89ed5 | 1146 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1147 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1148 | } | |
1149 | ||
1150 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1151 | dma->seg_count += entry->seg_count; |
1152 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1153 | dma->byte_count += byte_count; |
1154 | ||
b5e89ed5 DA |
1155 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1156 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1157 | |
30e2fb18 | 1158 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1159 | |
d59431bf DA |
1160 | request->count = entry->buf_count; |
1161 | request->size = size; | |
1da177e4 LT |
1162 | |
1163 | dma->flags = _DRM_DMA_USE_SG; | |
1164 | ||
b5e89ed5 | 1165 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1166 | return 0; |
1167 | } | |
1168 | ||
84b1fd10 | 1169 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1170 | { |
cdd55a29 DA |
1171 | struct drm_device_dma *dma = dev->dma; |
1172 | struct drm_buf_entry *entry; | |
056219e2 | 1173 | struct drm_buf *buf; |
b84397d6 DA |
1174 | unsigned long offset; |
1175 | unsigned long agp_offset; | |
1176 | int count; | |
1177 | int order; | |
1178 | int size; | |
1179 | int alignment; | |
1180 | int page_order; | |
1181 | int total; | |
1182 | int byte_count; | |
1183 | int i; | |
056219e2 | 1184 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1185 | |
1186 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1187 | return -EINVAL; | |
b5e89ed5 | 1188 | |
b84397d6 DA |
1189 | if (!dma) |
1190 | return -EINVAL; | |
1191 | ||
d985c108 DA |
1192 | if (!capable(CAP_SYS_ADMIN)) |
1193 | return -EPERM; | |
1194 | ||
d59431bf DA |
1195 | count = request->count; |
1196 | order = drm_order(request->size); | |
b84397d6 DA |
1197 | size = 1 << order; |
1198 | ||
d59431bf | 1199 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1200 | ? PAGE_ALIGN(size) : size; |
1201 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1202 | total = PAGE_SIZE << page_order; | |
1203 | ||
1204 | byte_count = 0; | |
d59431bf | 1205 | agp_offset = request->agp_start; |
b84397d6 DA |
1206 | |
1207 | DRM_DEBUG("count: %d\n", count); | |
1208 | DRM_DEBUG("order: %d\n", order); | |
1209 | DRM_DEBUG("size: %d\n", size); | |
1210 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1211 | DRM_DEBUG("alignment: %d\n", alignment); | |
1212 | DRM_DEBUG("page_order: %d\n", page_order); | |
1213 | DRM_DEBUG("total: %d\n", total); | |
1214 | ||
1215 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1216 | return -EINVAL; | |
1217 | if (dev->queue_count) | |
1218 | return -EBUSY; /* Not while in use */ | |
1219 | ||
1220 | spin_lock(&dev->count_lock); | |
1221 | if (dev->buf_use) { | |
1222 | spin_unlock(&dev->count_lock); | |
1223 | return -EBUSY; | |
1224 | } | |
1225 | atomic_inc(&dev->buf_alloc); | |
1226 | spin_unlock(&dev->count_lock); | |
1227 | ||
30e2fb18 | 1228 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1229 | entry = &dma->bufs[order]; |
1230 | if (entry->buf_count) { | |
30e2fb18 | 1231 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1232 | atomic_dec(&dev->buf_alloc); |
1233 | return -ENOMEM; /* May only call once for each order */ | |
1234 | } | |
1235 | ||
1236 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1237 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1238 | atomic_dec(&dev->buf_alloc); |
1239 | return -EINVAL; | |
1240 | } | |
1241 | ||
1242 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), | |
1243 | DRM_MEM_BUFS); | |
1244 | if (!entry->buflist) { | |
30e2fb18 | 1245 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1246 | atomic_dec(&dev->buf_alloc); |
1247 | return -ENOMEM; | |
1248 | } | |
1249 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1250 | ||
1251 | entry->buf_size = size; | |
1252 | entry->page_order = page_order; | |
1253 | ||
1254 | offset = 0; | |
1255 | ||
1256 | while (entry->buf_count < count) { | |
1257 | buf = &entry->buflist[entry->buf_count]; | |
1258 | buf->idx = dma->buf_count + entry->buf_count; | |
1259 | buf->total = alignment; | |
1260 | buf->order = order; | |
1261 | buf->used = 0; | |
1262 | ||
1263 | buf->offset = (dma->byte_count + offset); | |
1264 | buf->bus_address = agp_offset + offset; | |
1265 | buf->address = (void *)(agp_offset + offset); | |
1266 | buf->next = NULL; | |
1267 | buf->waiting = 0; | |
1268 | buf->pending = 0; | |
1269 | init_waitqueue_head(&buf->dma_wait); | |
6c340eac | 1270 | buf->file_priv = NULL; |
b84397d6 DA |
1271 | |
1272 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
1273 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); | |
1274 | if (!buf->dev_private) { | |
1275 | /* Set count correctly so we free the proper amount. */ | |
1276 | entry->buf_count = count; | |
1277 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1278 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1279 | atomic_dec(&dev->buf_alloc); |
1280 | return -ENOMEM; | |
1281 | } | |
1282 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1283 | ||
1284 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1285 | ||
1286 | offset += alignment; | |
1287 | entry->buf_count++; | |
1288 | byte_count += PAGE_SIZE << page_order; | |
1289 | } | |
1290 | ||
1291 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1292 | ||
1293 | temp_buflist = drm_realloc(dma->buflist, | |
1294 | dma->buf_count * sizeof(*dma->buflist), | |
1295 | (dma->buf_count + entry->buf_count) | |
1296 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1297 | if (!temp_buflist) { | |
1298 | /* Free the entry because it isn't valid */ | |
1299 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1300 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1301 | atomic_dec(&dev->buf_alloc); |
1302 | return -ENOMEM; | |
1303 | } | |
1304 | dma->buflist = temp_buflist; | |
1305 | ||
1306 | for (i = 0; i < entry->buf_count; i++) { | |
1307 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1308 | } | |
1309 | ||
1310 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1311 | dma->seg_count += entry->seg_count; |
1312 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1313 | dma->byte_count += byte_count; |
1314 | ||
1315 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1316 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1317 | ||
30e2fb18 | 1318 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1319 | |
d59431bf DA |
1320 | request->count = entry->buf_count; |
1321 | request->size = size; | |
b84397d6 DA |
1322 | |
1323 | dma->flags = _DRM_DMA_USE_FB; | |
1324 | ||
1325 | atomic_dec(&dev->buf_alloc); | |
1326 | return 0; | |
1327 | } | |
d985c108 | 1328 | |
b84397d6 | 1329 | |
1da177e4 LT |
1330 | /** |
1331 | * Add buffers for DMA transfers (ioctl). | |
1332 | * | |
1333 | * \param inode device inode. | |
6c340eac | 1334 | * \param file_priv DRM file private. |
1da177e4 | 1335 | * \param cmd command. |
c60ce623 | 1336 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1337 | * \return zero on success or a negative number on failure. |
1338 | * | |
1339 | * According with the memory type specified in drm_buf_desc::flags and the | |
1340 | * build options, it dispatches the call either to addbufs_agp(), | |
1341 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1342 | * PCI memory respectively. | |
1343 | */ | |
c153f45f EA |
1344 | int drm_addbufs(struct drm_device *dev, void *data, |
1345 | struct drm_file *file_priv) | |
1da177e4 | 1346 | { |
c153f45f | 1347 | struct drm_buf_desc *request = data; |
d59431bf | 1348 | int ret; |
b5e89ed5 | 1349 | |
1da177e4 LT |
1350 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1351 | return -EINVAL; | |
1352 | ||
1da177e4 | 1353 | #if __OS_HAS_AGP |
c153f45f EA |
1354 | if (request->flags & _DRM_AGP_BUFFER) |
1355 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1356 | else |
1357 | #endif | |
c153f45f EA |
1358 | if (request->flags & _DRM_SG_BUFFER) |
1359 | ret = drm_addbufs_sg(dev, request); | |
1360 | else if (request->flags & _DRM_FB_BUFFER) | |
1361 | ret = drm_addbufs_fb(dev, request); | |
1da177e4 | 1362 | else |
c153f45f | 1363 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1364 | |
d59431bf | 1365 | return ret; |
1da177e4 LT |
1366 | } |
1367 | ||
1da177e4 LT |
1368 | /** |
1369 | * Get information about the buffer mappings. | |
1370 | * | |
1371 | * This was originally mean for debugging purposes, or by a sophisticated | |
1372 | * client library to determine how best to use the available buffers (e.g., | |
1373 | * large buffers can be used for image transfer). | |
1374 | * | |
1375 | * \param inode device inode. | |
6c340eac | 1376 | * \param file_priv DRM file private. |
1da177e4 LT |
1377 | * \param cmd command. |
1378 | * \param arg pointer to a drm_buf_info structure. | |
1379 | * \return zero on success or a negative number on failure. | |
1380 | * | |
1381 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1382 | * lock, preventing of allocating more buffers after this call. Information | |
1383 | * about each requested buffer is then copied into user space. | |
1384 | */ | |
c153f45f EA |
1385 | int drm_infobufs(struct drm_device *dev, void *data, |
1386 | struct drm_file *file_priv) | |
1da177e4 | 1387 | { |
cdd55a29 | 1388 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1389 | struct drm_buf_info *request = data; |
1da177e4 LT |
1390 | int i; |
1391 | int count; | |
1392 | ||
1393 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1394 | return -EINVAL; | |
1395 | ||
b5e89ed5 DA |
1396 | if (!dma) |
1397 | return -EINVAL; | |
1da177e4 | 1398 | |
b5e89ed5 DA |
1399 | spin_lock(&dev->count_lock); |
1400 | if (atomic_read(&dev->buf_alloc)) { | |
1401 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1402 | return -EBUSY; |
1403 | } | |
1404 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1405 | spin_unlock(&dev->count_lock); |
1da177e4 | 1406 | |
b5e89ed5 DA |
1407 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1408 | if (dma->bufs[i].buf_count) | |
1409 | ++count; | |
1da177e4 LT |
1410 | } |
1411 | ||
b5e89ed5 | 1412 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1413 | |
c153f45f | 1414 | if (request->count >= count) { |
b5e89ed5 DA |
1415 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1416 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1417 | struct drm_buf_desc __user *to = |
c153f45f | 1418 | &request->list[count]; |
cdd55a29 DA |
1419 | struct drm_buf_entry *from = &dma->bufs[i]; |
1420 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1421 | if (copy_to_user(&to->count, |
1422 | &from->buf_count, | |
1423 | sizeof(from->buf_count)) || | |
1424 | copy_to_user(&to->size, | |
1425 | &from->buf_size, | |
1426 | sizeof(from->buf_size)) || | |
1427 | copy_to_user(&to->low_mark, | |
1428 | &list->low_mark, | |
1429 | sizeof(list->low_mark)) || | |
1430 | copy_to_user(&to->high_mark, | |
1431 | &list->high_mark, | |
1432 | sizeof(list->high_mark))) | |
1da177e4 LT |
1433 | return -EFAULT; |
1434 | ||
b5e89ed5 DA |
1435 | DRM_DEBUG("%d %d %d %d %d\n", |
1436 | i, | |
1437 | dma->bufs[i].buf_count, | |
1438 | dma->bufs[i].buf_size, | |
1439 | dma->bufs[i].freelist.low_mark, | |
1440 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1441 | ++count; |
1442 | } | |
1443 | } | |
1444 | } | |
c153f45f | 1445 | request->count = count; |
1da177e4 LT |
1446 | |
1447 | return 0; | |
1448 | } | |
1449 | ||
1450 | /** | |
1451 | * Specifies a low and high water mark for buffer allocation | |
1452 | * | |
1453 | * \param inode device inode. | |
6c340eac | 1454 | * \param file_priv DRM file private. |
1da177e4 LT |
1455 | * \param cmd command. |
1456 | * \param arg a pointer to a drm_buf_desc structure. | |
1457 | * \return zero on success or a negative number on failure. | |
1458 | * | |
1459 | * Verifies that the size order is bounded between the admissible orders and | |
1460 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1461 | * | |
1462 | * \note This ioctl is deprecated and mostly never used. | |
1463 | */ | |
c153f45f EA |
1464 | int drm_markbufs(struct drm_device *dev, void *data, |
1465 | struct drm_file *file_priv) | |
1da177e4 | 1466 | { |
cdd55a29 | 1467 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1468 | struct drm_buf_desc *request = data; |
1da177e4 | 1469 | int order; |
cdd55a29 | 1470 | struct drm_buf_entry *entry; |
1da177e4 LT |
1471 | |
1472 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1473 | return -EINVAL; | |
1474 | ||
b5e89ed5 DA |
1475 | if (!dma) |
1476 | return -EINVAL; | |
1da177e4 | 1477 | |
b5e89ed5 | 1478 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f EA |
1479 | request->size, request->low_mark, request->high_mark); |
1480 | order = drm_order(request->size); | |
b5e89ed5 DA |
1481 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1482 | return -EINVAL; | |
1da177e4 LT |
1483 | entry = &dma->bufs[order]; |
1484 | ||
c153f45f | 1485 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1486 | return -EINVAL; |
c153f45f | 1487 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1488 | return -EINVAL; |
1489 | ||
c153f45f EA |
1490 | entry->freelist.low_mark = request->low_mark; |
1491 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1492 | |
1493 | return 0; | |
1494 | } | |
1495 | ||
1496 | /** | |
b5e89ed5 | 1497 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1498 | * |
1499 | * \param inode device inode. | |
6c340eac | 1500 | * \param file_priv DRM file private. |
1da177e4 LT |
1501 | * \param cmd command. |
1502 | * \param arg pointer to a drm_buf_free structure. | |
1503 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1504 | * |
1da177e4 LT |
1505 | * Calls free_buffer() for each used buffer. |
1506 | * This function is primarily used for debugging. | |
1507 | */ | |
c153f45f EA |
1508 | int drm_freebufs(struct drm_device *dev, void *data, |
1509 | struct drm_file *file_priv) | |
1da177e4 | 1510 | { |
cdd55a29 | 1511 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1512 | struct drm_buf_free *request = data; |
1da177e4 LT |
1513 | int i; |
1514 | int idx; | |
056219e2 | 1515 | struct drm_buf *buf; |
1da177e4 LT |
1516 | |
1517 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1518 | return -EINVAL; | |
1519 | ||
b5e89ed5 DA |
1520 | if (!dma) |
1521 | return -EINVAL; | |
1da177e4 | 1522 | |
c153f45f EA |
1523 | DRM_DEBUG("%d\n", request->count); |
1524 | for (i = 0; i < request->count; i++) { | |
1525 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1526 | return -EFAULT; |
b5e89ed5 DA |
1527 | if (idx < 0 || idx >= dma->buf_count) { |
1528 | DRM_ERROR("Index %d (of %d max)\n", | |
1529 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1530 | return -EINVAL; |
1531 | } | |
1532 | buf = dma->buflist[idx]; | |
6c340eac | 1533 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1534 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1535 | task_pid_nr(current)); |
1da177e4 LT |
1536 | return -EINVAL; |
1537 | } | |
b5e89ed5 | 1538 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1539 | } |
1540 | ||
1541 | return 0; | |
1542 | } | |
1543 | ||
1544 | /** | |
1545 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1546 | * | |
1547 | * \param inode device inode. | |
6c340eac | 1548 | * \param file_priv DRM file private. |
1da177e4 LT |
1549 | * \param cmd command. |
1550 | * \param arg pointer to a drm_buf_map structure. | |
1551 | * \return zero on success or a negative number on failure. | |
1552 | * | |
3417f33e GS |
1553 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1554 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1555 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1556 | * drm_mmap_dma(). | |
1da177e4 | 1557 | */ |
c153f45f EA |
1558 | int drm_mapbufs(struct drm_device *dev, void *data, |
1559 | struct drm_file *file_priv) | |
1da177e4 | 1560 | { |
cdd55a29 | 1561 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1562 | int retcode = 0; |
1563 | const int zero = 0; | |
1564 | unsigned long virtual; | |
1565 | unsigned long address; | |
c153f45f | 1566 | struct drm_buf_map *request = data; |
1da177e4 LT |
1567 | int i; |
1568 | ||
1569 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1570 | return -EINVAL; | |
1571 | ||
b5e89ed5 DA |
1572 | if (!dma) |
1573 | return -EINVAL; | |
1da177e4 | 1574 | |
b5e89ed5 DA |
1575 | spin_lock(&dev->count_lock); |
1576 | if (atomic_read(&dev->buf_alloc)) { | |
1577 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1578 | return -EBUSY; |
1579 | } | |
1580 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1581 | spin_unlock(&dev->count_lock); |
1da177e4 | 1582 | |
c153f45f | 1583 | if (request->count >= dma->buf_count) { |
b84397d6 | 1584 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1585 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1586 | && (dma->flags & _DRM_DMA_USE_SG)) |
1587 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1588 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
f77d390c | 1589 | struct drm_local_map *map = dev->agp_buffer_map; |
d1f2b55a | 1590 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1591 | |
b5e89ed5 | 1592 | if (!map) { |
1da177e4 LT |
1593 | retcode = -EINVAL; |
1594 | goto done; | |
1595 | } | |
b5e89ed5 | 1596 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1597 | virtual = do_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1598 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1599 | MAP_SHARED, |
1600 | token); | |
b5e89ed5 | 1601 | up_write(¤t->mm->mmap_sem); |
1da177e4 | 1602 | } else { |
b5e89ed5 | 1603 | down_write(¤t->mm->mmap_sem); |
6c340eac | 1604 | virtual = do_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1605 | PROT_READ | PROT_WRITE, |
1606 | MAP_SHARED, 0); | |
1607 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1608 | } |
b5e89ed5 | 1609 | if (virtual > -1024UL) { |
1da177e4 LT |
1610 | /* Real error */ |
1611 | retcode = (signed long)virtual; | |
1612 | goto done; | |
1613 | } | |
c153f45f | 1614 | request->virtual = (void __user *)virtual; |
1da177e4 | 1615 | |
b5e89ed5 | 1616 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1617 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1618 | &dma->buflist[i]->idx, |
c153f45f | 1619 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1620 | retcode = -EFAULT; |
1621 | goto done; | |
1622 | } | |
c153f45f | 1623 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1624 | &dma->buflist[i]->total, |
c153f45f | 1625 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1626 | retcode = -EFAULT; |
1627 | goto done; | |
1628 | } | |
c153f45f | 1629 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1630 | &zero, sizeof(zero))) { |
1da177e4 LT |
1631 | retcode = -EFAULT; |
1632 | goto done; | |
1633 | } | |
b5e89ed5 | 1634 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1635 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1636 | &address, sizeof(address))) { |
1da177e4 LT |
1637 | retcode = -EFAULT; |
1638 | goto done; | |
1639 | } | |
1640 | } | |
1641 | } | |
b5e89ed5 | 1642 | done: |
c153f45f EA |
1643 | request->count = dma->buf_count; |
1644 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1645 | |
1646 | return retcode; | |
1647 | } | |
1648 | ||
836cf046 DA |
1649 | /** |
1650 | * Compute size order. Returns the exponent of the smaller power of two which | |
1651 | * is greater or equal to given number. | |
b5e89ed5 | 1652 | * |
836cf046 DA |
1653 | * \param size size. |
1654 | * \return order. | |
1655 | * | |
1656 | * \todo Can be made faster. | |
1657 | */ | |
b5e89ed5 | 1658 | int drm_order(unsigned long size) |
836cf046 DA |
1659 | { |
1660 | int order; | |
1661 | unsigned long tmp; | |
1662 | ||
b5e89ed5 | 1663 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1664 | |
1665 | if (size & (size - 1)) | |
1666 | ++order; | |
1667 | ||
1668 | return order; | |
1669 | } | |
1670 | EXPORT_SYMBOL(drm_order); |