Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
9fc5cde7 | 2 | * Legacy: Generic DRM Buffer Management |
1da177e4 LT |
3 | * |
4 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. | |
5 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
6 | * All Rights Reserved. | |
7 | * | |
9fc5cde7 DH |
8 | * Author: Rickard E. (Rik) Faith <faith@valinux.com> |
9 | * Author: Gareth Hughes <gareth@valinux.com> | |
10 | * | |
1da177e4 LT |
11 | * Permission is hereby granted, free of charge, to any person obtaining a |
12 | * copy of this software and associated documentation files (the "Software"), | |
13 | * to deal in the Software without restriction, including without limitation | |
14 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
15 | * and/or sell copies of the Software, and to permit persons to whom the | |
16 | * Software is furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice (including the next | |
19 | * paragraph) shall be included in all copies or substantial portions of the | |
20 | * Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
25 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
26 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
27 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
28 | * OTHER DEALINGS IN THE SOFTWARE. | |
29 | */ | |
30 | ||
31 | #include <linux/vmalloc.h> | |
5a0e3ad6 | 32 | #include <linux/slab.h> |
f1a2a9b6 | 33 | #include <linux/log2.h> |
2d1a8a48 | 34 | #include <linux/export.h> |
f1a2a9b6 | 35 | #include <asm/shmparam.h> |
760285e7 | 36 | #include <drm/drmP.h> |
9fc5cde7 | 37 | #include "drm_legacy.h" |
1da177e4 | 38 | |
55910517 | 39 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
f77d390c | 40 | struct drm_local_map *map) |
836cf046 | 41 | { |
55910517 | 42 | struct drm_map_list *entry; |
bd1b331f | 43 | list_for_each_entry(entry, &dev->maplist, head) { |
41c2e75e BH |
44 | /* |
45 | * Because the kernel-userspace ABI is fixed at a 32-bit offset | |
66aa6962 TV |
46 | * while PCI resources may live above that, we only compare the |
47 | * lower 32 bits of the map offset for maps of type | |
48 | * _DRM_FRAMEBUFFER or _DRM_REGISTERS. | |
49 | * It is assumed that if a driver have more than one resource | |
50 | * of each type, the lower 32 bits are different. | |
41c2e75e BH |
51 | */ |
52 | if (!entry->map || | |
53 | map->type != entry->map->type || | |
54 | entry->master != dev->primary->master) | |
55 | continue; | |
56 | switch (map->type) { | |
57 | case _DRM_SHM: | |
58 | if (map->flags != _DRM_CONTAINS_LOCK) | |
59 | break; | |
66aa6962 | 60 | return entry; |
41c2e75e BH |
61 | case _DRM_REGISTERS: |
62 | case _DRM_FRAME_BUFFER: | |
66aa6962 TV |
63 | if ((entry->map->offset & 0xffffffff) == |
64 | (map->offset & 0xffffffff)) | |
65 | return entry; | |
41c2e75e BH |
66 | default: /* Make gcc happy */ |
67 | ; | |
836cf046 | 68 | } |
41c2e75e BH |
69 | if (entry->map->offset == map->offset) |
70 | return entry; | |
836cf046 DA |
71 | } |
72 | ||
73 | return NULL; | |
1da177e4 | 74 | } |
1da177e4 | 75 | |
e0be428e | 76 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
f1a2a9b6 | 77 | unsigned long user_token, int hashed_handle, int shm) |
d1f2b55a | 78 | { |
f1a2a9b6 DM |
79 | int use_hashed_handle, shift; |
80 | unsigned long add; | |
81 | ||
c2604ce0 | 82 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
83 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
84 | #elif (BITS_PER_LONG == 32) | |
85 | use_hashed_handle = hashed_handle; | |
86 | #else | |
87 | #error Unsupported long size. Neither 64 nor 32 bits. | |
88 | #endif | |
d1f2b55a | 89 | |
e08870c8 TH |
90 | if (!use_hashed_handle) { |
91 | int ret; | |
1545085a | 92 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
93 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
94 | if (ret != -EINVAL) | |
95 | return ret; | |
d1f2b55a | 96 | } |
f1a2a9b6 DM |
97 | |
98 | shift = 0; | |
99 | add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT; | |
100 | if (shm && (SHMLBA > PAGE_SIZE)) { | |
101 | int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1; | |
102 | ||
103 | /* For shared memory, we have to preserve the SHMLBA | |
104 | * bits of the eventual vma->vm_pgoff value during | |
105 | * mmap(). Otherwise we run into cache aliasing problems | |
106 | * on some platforms. On these platforms, the pgoff of | |
107 | * a mmap() request is used to pick a suitable virtual | |
108 | * address for the mmap() region such that it will not | |
109 | * cause cache aliasing problems. | |
110 | * | |
111 | * Therefore, make sure the SHMLBA relevant bits of the | |
112 | * hash value we use are equal to those in the original | |
113 | * kernel virtual address. | |
114 | */ | |
115 | shift = bits; | |
116 | add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL)); | |
117 | } | |
118 | ||
e08870c8 TH |
119 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
120 | user_token, 32 - PAGE_SHIFT - 3, | |
f1a2a9b6 | 121 | shift, add); |
d1f2b55a | 122 | } |
9a186645 | 123 | |
1da177e4 | 124 | /** |
f77d390c BH |
125 | * Core function to create a range of memory available for mapping by a |
126 | * non-root process. | |
1da177e4 LT |
127 | * |
128 | * Adjusts the memory offset to its absolute value according to the mapping | |
129 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
130 | * applicable and if supported by the kernel. | |
131 | */ | |
41c2e75e | 132 | static int drm_addmap_core(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 133 | unsigned int size, enum drm_map_type type, |
55910517 DA |
134 | enum drm_map_flags flags, |
135 | struct drm_map_list ** maplist) | |
1da177e4 | 136 | { |
f77d390c | 137 | struct drm_local_map *map; |
55910517 | 138 | struct drm_map_list *list; |
9c8da5eb | 139 | drm_dma_handle_t *dmah; |
8d153f71 TH |
140 | unsigned long user_token; |
141 | int ret; | |
1da177e4 | 142 | |
9a298b2a | 143 | map = kmalloc(sizeof(*map), GFP_KERNEL); |
b5e89ed5 | 144 | if (!map) |
1da177e4 LT |
145 | return -ENOMEM; |
146 | ||
7ab98401 DA |
147 | map->offset = offset; |
148 | map->size = size; | |
149 | map->flags = flags; | |
150 | map->type = type; | |
1da177e4 LT |
151 | |
152 | /* Only allow shared memory to be removable since we only keep enough | |
153 | * book keeping information about shared memory to allow for removal | |
154 | * when processes fork. | |
155 | */ | |
b5e89ed5 | 156 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
9a298b2a | 157 | kfree(map); |
1da177e4 LT |
158 | return -EINVAL; |
159 | } | |
41c2e75e BH |
160 | DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n", |
161 | (unsigned long long)map->offset, map->size, map->type); | |
b6741377 BH |
162 | |
163 | /* page-align _DRM_SHM maps. They are allocated here so there is no security | |
164 | * hole created by that and it works around various broken drivers that use | |
165 | * a non-aligned quantity to map the SAREA. --BenH | |
166 | */ | |
167 | if (map->type == _DRM_SHM) | |
168 | map->size = PAGE_ALIGN(map->size); | |
169 | ||
41c2e75e | 170 | if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) { |
9a298b2a | 171 | kfree(map); |
1da177e4 LT |
172 | return -EINVAL; |
173 | } | |
b5e89ed5 | 174 | map->mtrr = -1; |
1da177e4 LT |
175 | map->handle = NULL; |
176 | ||
b5e89ed5 | 177 | switch (map->type) { |
1da177e4 LT |
178 | case _DRM_REGISTERS: |
179 | case _DRM_FRAME_BUFFER: | |
4b7fb9b5 | 180 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__arm__) |
8d2ea625 | 181 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 | 182 | map->offset < virt_to_phys(high_memory)) { |
9a298b2a | 183 | kfree(map); |
1da177e4 LT |
184 | return -EINVAL; |
185 | } | |
1da177e4 | 186 | #endif |
836cf046 DA |
187 | /* Some drivers preinitialize some maps, without the X Server |
188 | * needing to be aware of it. Therefore, we just return success | |
189 | * when the server tries to create a duplicate map. | |
190 | */ | |
89625eb1 DA |
191 | list = drm_find_matching_map(dev, map); |
192 | if (list != NULL) { | |
193 | if (list->map->size != map->size) { | |
836cf046 | 194 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
195 | "mismatched sizes, (%ld vs %ld)\n", |
196 | map->type, map->size, | |
197 | list->map->size); | |
89625eb1 | 198 | list->map->size = map->size; |
836cf046 DA |
199 | } |
200 | ||
9a298b2a | 201 | kfree(map); |
89625eb1 | 202 | *maplist = list; |
836cf046 DA |
203 | return 0; |
204 | } | |
205 | ||
28185647 DV |
206 | if (map->type == _DRM_FRAME_BUFFER || |
207 | (map->flags & _DRM_WRITE_COMBINING)) { | |
208 | map->mtrr = | |
209 | arch_phys_wc_add(map->offset, map->size); | |
1da177e4 | 210 | } |
0769d39c | 211 | if (map->type == _DRM_REGISTERS) { |
ff47eaf2 AL |
212 | if (map->flags & _DRM_WRITE_COMBINING) |
213 | map->handle = ioremap_wc(map->offset, | |
214 | map->size); | |
215 | else | |
216 | map->handle = ioremap(map->offset, map->size); | |
0769d39c | 217 | if (!map->handle) { |
9a298b2a | 218 | kfree(map); |
0769d39c ST |
219 | return -ENOMEM; |
220 | } | |
221 | } | |
bc5f4523 | 222 | |
1da177e4 | 223 | break; |
1da177e4 | 224 | case _DRM_SHM: |
54ba2f76 DA |
225 | list = drm_find_matching_map(dev, map); |
226 | if (list != NULL) { | |
227 | if(list->map->size != map->size) { | |
228 | DRM_DEBUG("Matching maps of type %d with " | |
229 | "mismatched sizes, (%ld vs %ld)\n", | |
230 | map->type, map->size, list->map->size); | |
231 | list->map->size = map->size; | |
232 | } | |
233 | ||
9a298b2a | 234 | kfree(map); |
54ba2f76 DA |
235 | *maplist = list; |
236 | return 0; | |
237 | } | |
f239b7b0 | 238 | map->handle = vmalloc_user(map->size); |
b5e89ed5 | 239 | DRM_DEBUG("%lu %d %p\n", |
04420c9c | 240 | map->size, order_base_2(map->size), map->handle); |
b5e89ed5 | 241 | if (!map->handle) { |
9a298b2a | 242 | kfree(map); |
1da177e4 LT |
243 | return -ENOMEM; |
244 | } | |
245 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 246 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 247 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
7c1c2871 | 248 | if (dev->primary->master->lock.hw_lock != NULL) { |
b5e89ed5 | 249 | vfree(map->handle); |
9a298b2a | 250 | kfree(map); |
1da177e4 LT |
251 | return -EBUSY; |
252 | } | |
7c1c2871 | 253 | dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
254 | } |
255 | break; | |
54ba2f76 | 256 | case _DRM_AGP: { |
55910517 | 257 | struct drm_agp_mem *entry; |
54ba2f76 DA |
258 | int valid = 0; |
259 | ||
d9906753 | 260 | if (!dev->agp) { |
9a298b2a | 261 | kfree(map); |
54ba2f76 DA |
262 | return -EINVAL; |
263 | } | |
1da177e4 | 264 | #ifdef __alpha__ |
54ba2f76 | 265 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 266 | #endif |
47a184a8 EA |
267 | /* In some cases (i810 driver), user space may have already |
268 | * added the AGP base itself, because dev->agp->base previously | |
269 | * only got set during AGP enable. So, only add the base | |
270 | * address if the map's offset isn't already within the | |
271 | * aperture. | |
54ba2f76 | 272 | */ |
47a184a8 EA |
273 | if (map->offset < dev->agp->base || |
274 | map->offset > dev->agp->base + | |
275 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
276 | map->offset += dev->agp->base; | |
277 | } | |
54ba2f76 DA |
278 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
279 | ||
280 | /* This assumes the DRM is in total control of AGP space. | |
281 | * It's not always the case as AGP can be in the control | |
282 | * of user space (i.e. i810 driver). So this loop will get | |
283 | * skipped and we double check that dev->agp->memory is | |
284 | * actually set as well as being invalid before EPERM'ing | |
285 | */ | |
bd1b331f | 286 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
287 | if ((map->offset >= entry->bound) && |
288 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
289 | valid = 1; | |
290 | break; | |
291 | } | |
1da177e4 | 292 | } |
bd1b331f | 293 | if (!list_empty(&dev->agp->memory) && !valid) { |
9a298b2a | 294 | kfree(map); |
54ba2f76 DA |
295 | return -EPERM; |
296 | } | |
41c2e75e BH |
297 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
298 | (unsigned long long)map->offset, map->size); | |
54ba2f76 | 299 | |
a2c0a97b | 300 | break; |
812c369d | 301 | } |
1da177e4 LT |
302 | case _DRM_SCATTER_GATHER: |
303 | if (!dev->sg) { | |
9a298b2a | 304 | kfree(map); |
1da177e4 LT |
305 | return -EINVAL; |
306 | } | |
d1f2b55a | 307 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 308 | break; |
b5e89ed5 | 309 | case _DRM_CONSISTENT: |
2d0f9eaf | 310 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 311 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
312 | * casting it down to 32 bits is no problem, but we |
313 | * need to point to a 64bit variable first. */ | |
e6be8d9d | 314 | dmah = drm_pci_alloc(dev, map->size, map->size); |
9c8da5eb | 315 | if (!dmah) { |
9a298b2a | 316 | kfree(map); |
2d0f9eaf DA |
317 | return -ENOMEM; |
318 | } | |
9c8da5eb DA |
319 | map->handle = dmah->vaddr; |
320 | map->offset = (unsigned long)dmah->busaddr; | |
321 | kfree(dmah); | |
2d0f9eaf | 322 | break; |
1da177e4 | 323 | default: |
9a298b2a | 324 | kfree(map); |
1da177e4 LT |
325 | return -EINVAL; |
326 | } | |
327 | ||
94e3370e | 328 | list = kzalloc(sizeof(*list), GFP_KERNEL); |
b5e89ed5 | 329 | if (!list) { |
85abb3f9 | 330 | if (map->type == _DRM_REGISTERS) |
004a7727 | 331 | iounmap(map->handle); |
9a298b2a | 332 | kfree(map); |
1da177e4 LT |
333 | return -EINVAL; |
334 | } | |
1da177e4 LT |
335 | list->map = map; |
336 | ||
30e2fb18 | 337 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 338 | list_add(&list->head, &dev->maplist); |
8d153f71 | 339 | |
d1f2b55a | 340 | /* Assign a 32-bit handle */ |
30e2fb18 | 341 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
342 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
343 | map->offset; | |
f1a2a9b6 DM |
344 | ret = drm_map_handle(dev, &list->hash, user_token, 0, |
345 | (map->type == _DRM_SHM)); | |
8d153f71 | 346 | if (ret) { |
85abb3f9 | 347 | if (map->type == _DRM_REGISTERS) |
004a7727 | 348 | iounmap(map->handle); |
9a298b2a EA |
349 | kfree(map); |
350 | kfree(list); | |
8d153f71 TH |
351 | mutex_unlock(&dev->struct_mutex); |
352 | return ret; | |
353 | } | |
354 | ||
1545085a | 355 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 356 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 357 | |
2ff2e8a3 BS |
358 | if (!(map->flags & _DRM_DRIVER)) |
359 | list->master = dev->primary->master; | |
89625eb1 | 360 | *maplist = list; |
7ab98401 | 361 | return 0; |
afe0f696 | 362 | } |
89625eb1 | 363 | |
9fc5cde7 DH |
364 | int drm_legacy_addmap(struct drm_device * dev, resource_size_t offset, |
365 | unsigned int size, enum drm_map_type type, | |
366 | enum drm_map_flags flags, struct drm_local_map **map_ptr) | |
89625eb1 | 367 | { |
55910517 | 368 | struct drm_map_list *list; |
89625eb1 DA |
369 | int rc; |
370 | ||
371 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
372 | if (!rc) | |
373 | *map_ptr = list->map; | |
374 | return rc; | |
375 | } | |
9fc5cde7 | 376 | EXPORT_SYMBOL(drm_legacy_addmap); |
7ab98401 | 377 | |
f77d390c BH |
378 | /** |
379 | * Ioctl to specify a range of memory that is available for mapping by a | |
380 | * non-root process. | |
381 | * | |
382 | * \param inode device inode. | |
383 | * \param file_priv DRM file private. | |
384 | * \param cmd command. | |
385 | * \param arg pointer to a drm_map structure. | |
386 | * \return zero on success or a negative value on error. | |
387 | * | |
388 | */ | |
9fc5cde7 DH |
389 | int drm_legacy_addmap_ioctl(struct drm_device *dev, void *data, |
390 | struct drm_file *file_priv) | |
7ab98401 | 391 | { |
c153f45f | 392 | struct drm_map *map = data; |
55910517 | 393 | struct drm_map_list *maplist; |
7ab98401 DA |
394 | int err; |
395 | ||
7c1c2871 | 396 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
397 | return -EPERM; |
398 | ||
e975eef0 DV |
399 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
400 | drm_core_check_feature(dev, DRIVER_MODESET)) | |
401 | return -EINVAL; | |
402 | ||
c153f45f EA |
403 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
404 | map->flags, &maplist); | |
7ab98401 | 405 | |
b5e89ed5 | 406 | if (err) |
7ab98401 | 407 | return err; |
d1f2b55a | 408 | |
67e1a014 | 409 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 410 | map->handle = (void *)(unsigned long)maplist->user_token; |
0dd99f1b AL |
411 | |
412 | /* | |
413 | * It appears that there are no users of this value whatsoever -- | |
414 | * drmAddMap just discards it. Let's not encourage its use. | |
415 | * (Keeping drm_addmap_core's returned mtrr value would be wrong -- | |
416 | * it's not a real mtrr index anymore.) | |
417 | */ | |
418 | map->mtrr = -1; | |
419 | ||
1da177e4 | 420 | return 0; |
88f399cd | 421 | } |
1da177e4 | 422 | |
ec1f52ef DV |
423 | /* |
424 | * Get a mapping information. | |
425 | * | |
426 | * \param inode device inode. | |
427 | * \param file_priv DRM file private. | |
428 | * \param cmd command. | |
429 | * \param arg user argument, pointing to a drm_map structure. | |
430 | * | |
431 | * \return zero on success or a negative number on failure. | |
432 | * | |
433 | * Searches for the mapping with the specified offset and copies its information | |
434 | * into userspace | |
435 | */ | |
436 | int drm_legacy_getmap_ioctl(struct drm_device *dev, void *data, | |
437 | struct drm_file *file_priv) | |
438 | { | |
439 | struct drm_map *map = data; | |
440 | struct drm_map_list *r_list = NULL; | |
441 | struct list_head *list; | |
442 | int idx; | |
443 | int i; | |
444 | ||
e975eef0 DV |
445 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
446 | drm_core_check_feature(dev, DRIVER_MODESET)) | |
447 | return -EINVAL; | |
448 | ||
ec1f52ef DV |
449 | idx = map->offset; |
450 | if (idx < 0) | |
451 | return -EINVAL; | |
452 | ||
453 | i = 0; | |
454 | mutex_lock(&dev->struct_mutex); | |
455 | list_for_each(list, &dev->maplist) { | |
456 | if (i == idx) { | |
457 | r_list = list_entry(list, struct drm_map_list, head); | |
458 | break; | |
459 | } | |
460 | i++; | |
461 | } | |
462 | if (!r_list || !r_list->map) { | |
463 | mutex_unlock(&dev->struct_mutex); | |
464 | return -EINVAL; | |
465 | } | |
466 | ||
467 | map->offset = r_list->map->offset; | |
468 | map->size = r_list->map->size; | |
469 | map->type = r_list->map->type; | |
470 | map->flags = r_list->map->flags; | |
471 | map->handle = (void *)(unsigned long) r_list->user_token; | |
472 | map->mtrr = arch_phys_wc_index(r_list->map->mtrr); | |
473 | ||
474 | mutex_unlock(&dev->struct_mutex); | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
1da177e4 LT |
479 | /** |
480 | * Remove a map private from list and deallocate resources if the mapping | |
481 | * isn't in use. | |
482 | * | |
1da177e4 LT |
483 | * Searches the map on drm_device::maplist, removes it from the list, see if |
484 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
485 | * being on use. | |
486 | * | |
9fc5cde7 | 487 | * \sa drm_legacy_addmap |
1da177e4 | 488 | */ |
9fc5cde7 | 489 | int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 490 | { |
55910517 | 491 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 492 | drm_dma_handle_t dmah; |
bd1b331f | 493 | int found = 0; |
7c1c2871 | 494 | struct drm_master *master; |
1da177e4 | 495 | |
836cf046 | 496 | /* Find the list entry for the map and remove it */ |
bd1b331f | 497 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 498 | if (r_list->map == map) { |
7c1c2871 | 499 | master = r_list->master; |
bd1b331f | 500 | list_del(&r_list->head); |
1545085a TH |
501 | drm_ht_remove_key(&dev->map_hash, |
502 | r_list->user_token >> PAGE_SHIFT); | |
9a298b2a | 503 | kfree(r_list); |
bd1b331f | 504 | found = 1; |
836cf046 DA |
505 | break; |
506 | } | |
1da177e4 LT |
507 | } |
508 | ||
bd1b331f | 509 | if (!found) |
1da177e4 | 510 | return -EINVAL; |
1da177e4 | 511 | |
836cf046 DA |
512 | switch (map->type) { |
513 | case _DRM_REGISTERS: | |
004a7727 | 514 | iounmap(map->handle); |
836cf046 DA |
515 | /* FALLTHROUGH */ |
516 | case _DRM_FRAME_BUFFER: | |
28185647 | 517 | arch_phys_wc_del(map->mtrr); |
836cf046 DA |
518 | break; |
519 | case _DRM_SHM: | |
520 | vfree(map->handle); | |
7c1c2871 DA |
521 | if (master) { |
522 | if (dev->sigdata.lock == master->lock.hw_lock) | |
523 | dev->sigdata.lock = NULL; | |
524 | master->lock.hw_lock = NULL; /* SHM removed */ | |
525 | master->lock.file_priv = NULL; | |
171901d1 | 526 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 527 | } |
836cf046 DA |
528 | break; |
529 | case _DRM_AGP: | |
530 | case _DRM_SCATTER_GATHER: | |
531 | break; | |
532 | case _DRM_CONSISTENT: | |
533 | dmah.vaddr = map->handle; | |
534 | dmah.busaddr = map->offset; | |
535 | dmah.size = map->size; | |
1c96e84e | 536 | __drm_legacy_pci_free(dev, &dmah); |
836cf046 | 537 | break; |
1da177e4 | 538 | } |
9a298b2a | 539 | kfree(map); |
836cf046 | 540 | |
1da177e4 LT |
541 | return 0; |
542 | } | |
9fc5cde7 | 543 | EXPORT_SYMBOL(drm_legacy_rmmap_locked); |
836cf046 | 544 | |
9fc5cde7 | 545 | int drm_legacy_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 DA |
546 | { |
547 | int ret; | |
548 | ||
30e2fb18 | 549 | mutex_lock(&dev->struct_mutex); |
9fc5cde7 | 550 | ret = drm_legacy_rmmap_locked(dev, map); |
30e2fb18 | 551 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
552 | |
553 | return ret; | |
554 | } | |
9fc5cde7 | 555 | EXPORT_SYMBOL(drm_legacy_rmmap); |
7ab98401 | 556 | |
836cf046 DA |
557 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
558 | * the last close of the device, and this is necessary for cleanup when things | |
559 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
560 | * like a pointless exercise since they're going away anyway. | |
561 | * | |
562 | * One use case might be after addmap is allowed for normal users for SHM and | |
563 | * gets used by drivers that the server doesn't need to care about. This seems | |
564 | * unlikely. | |
f77d390c BH |
565 | * |
566 | * \param inode device inode. | |
567 | * \param file_priv DRM file private. | |
568 | * \param cmd command. | |
569 | * \param arg pointer to a struct drm_map structure. | |
570 | * \return zero on success or a negative value on error. | |
836cf046 | 571 | */ |
9fc5cde7 DH |
572 | int drm_legacy_rmmap_ioctl(struct drm_device *dev, void *data, |
573 | struct drm_file *file_priv) | |
7ab98401 | 574 | { |
c153f45f | 575 | struct drm_map *request = data; |
f77d390c | 576 | struct drm_local_map *map = NULL; |
55910517 | 577 | struct drm_map_list *r_list; |
836cf046 | 578 | int ret; |
7ab98401 | 579 | |
e975eef0 DV |
580 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
581 | drm_core_check_feature(dev, DRIVER_MODESET)) | |
582 | return -EINVAL; | |
583 | ||
30e2fb18 | 584 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 585 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 586 | if (r_list->map && |
c153f45f | 587 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
588 | r_list->map->flags & _DRM_REMOVABLE) { |
589 | map = r_list->map; | |
590 | break; | |
591 | } | |
592 | } | |
593 | ||
594 | /* List has wrapped around to the head pointer, or its empty we didn't | |
595 | * find anything. | |
596 | */ | |
bd1b331f | 597 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 598 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
599 | return -EINVAL; |
600 | } | |
601 | ||
836cf046 DA |
602 | /* Register and framebuffer maps are permanent */ |
603 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 604 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
605 | return 0; |
606 | } | |
607 | ||
9fc5cde7 | 608 | ret = drm_legacy_rmmap_locked(dev, map); |
836cf046 | 609 | |
30e2fb18 | 610 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
611 | |
612 | return ret; | |
7ab98401 | 613 | } |
1da177e4 LT |
614 | |
615 | /** | |
616 | * Cleanup after an error on one of the addbufs() functions. | |
617 | * | |
836cf046 | 618 | * \param dev DRM device. |
1da177e4 LT |
619 | * \param entry buffer entry where the error occurred. |
620 | * | |
621 | * Frees any pages and buffers associated with the given entry. | |
622 | */ | |
cdd55a29 DA |
623 | static void drm_cleanup_buf_error(struct drm_device * dev, |
624 | struct drm_buf_entry * entry) | |
1da177e4 LT |
625 | { |
626 | int i; | |
627 | ||
628 | if (entry->seg_count) { | |
629 | for (i = 0; i < entry->seg_count; i++) { | |
630 | if (entry->seglist[i]) { | |
ddf19b97 | 631 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
632 | } |
633 | } | |
9a298b2a | 634 | kfree(entry->seglist); |
1da177e4 LT |
635 | |
636 | entry->seg_count = 0; | |
637 | } | |
638 | ||
b5e89ed5 DA |
639 | if (entry->buf_count) { |
640 | for (i = 0; i < entry->buf_count; i++) { | |
9a298b2a | 641 | kfree(entry->buflist[i].dev_private); |
1da177e4 | 642 | } |
9a298b2a | 643 | kfree(entry->buflist); |
1da177e4 LT |
644 | |
645 | entry->buf_count = 0; | |
646 | } | |
647 | } | |
648 | ||
a7fb8a23 | 649 | #if IS_ENABLED(CONFIG_AGP) |
1da177e4 | 650 | /** |
d59431bf | 651 | * Add AGP buffers for DMA transfers. |
1da177e4 | 652 | * |
84b1fd10 | 653 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 654 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 655 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 656 | * |
1da177e4 LT |
657 | * After some sanity checks creates a drm_buf structure for each buffer and |
658 | * reallocates the buffer list of the same size order to accommodate the new | |
659 | * buffers. | |
660 | */ | |
9fc5cde7 DH |
661 | int drm_legacy_addbufs_agp(struct drm_device *dev, |
662 | struct drm_buf_desc *request) | |
1da177e4 | 663 | { |
cdd55a29 DA |
664 | struct drm_device_dma *dma = dev->dma; |
665 | struct drm_buf_entry *entry; | |
55910517 | 666 | struct drm_agp_mem *agp_entry; |
056219e2 | 667 | struct drm_buf *buf; |
1da177e4 LT |
668 | unsigned long offset; |
669 | unsigned long agp_offset; | |
670 | int count; | |
671 | int order; | |
672 | int size; | |
673 | int alignment; | |
674 | int page_order; | |
675 | int total; | |
676 | int byte_count; | |
54ba2f76 | 677 | int i, valid; |
056219e2 | 678 | struct drm_buf **temp_buflist; |
1da177e4 | 679 | |
b5e89ed5 DA |
680 | if (!dma) |
681 | return -EINVAL; | |
1da177e4 | 682 | |
d59431bf | 683 | count = request->count; |
04420c9c | 684 | order = order_base_2(request->size); |
1da177e4 LT |
685 | size = 1 << order; |
686 | ||
b5e89ed5 DA |
687 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
688 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
689 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
690 | total = PAGE_SIZE << page_order; | |
691 | ||
692 | byte_count = 0; | |
d59431bf | 693 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 694 | |
b5e89ed5 DA |
695 | DRM_DEBUG("count: %d\n", count); |
696 | DRM_DEBUG("order: %d\n", order); | |
697 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 698 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
699 | DRM_DEBUG("alignment: %d\n", alignment); |
700 | DRM_DEBUG("page_order: %d\n", page_order); | |
701 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 702 | |
b5e89ed5 DA |
703 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
704 | return -EINVAL; | |
1da177e4 | 705 | |
54ba2f76 DA |
706 | /* Make sure buffers are located in AGP memory that we own */ |
707 | valid = 0; | |
bd1b331f | 708 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
709 | if ((agp_offset >= agp_entry->bound) && |
710 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
711 | valid = 1; | |
712 | break; | |
713 | } | |
714 | } | |
bd1b331f | 715 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
716 | DRM_DEBUG("zone invalid\n"); |
717 | return -EINVAL; | |
718 | } | |
2177a218 | 719 | spin_lock(&dev->buf_lock); |
b5e89ed5 | 720 | if (dev->buf_use) { |
2177a218 | 721 | spin_unlock(&dev->buf_lock); |
1da177e4 LT |
722 | return -EBUSY; |
723 | } | |
b5e89ed5 | 724 | atomic_inc(&dev->buf_alloc); |
2177a218 | 725 | spin_unlock(&dev->buf_lock); |
1da177e4 | 726 | |
30e2fb18 | 727 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 728 | entry = &dma->bufs[order]; |
b5e89ed5 | 729 | if (entry->buf_count) { |
30e2fb18 | 730 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
731 | atomic_dec(&dev->buf_alloc); |
732 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
733 | } |
734 | ||
735 | if (count < 0 || count > 4096) { | |
30e2fb18 | 736 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 737 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
738 | return -EINVAL; |
739 | } | |
740 | ||
94e3370e | 741 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 742 | if (!entry->buflist) { |
30e2fb18 | 743 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 744 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
745 | return -ENOMEM; |
746 | } | |
1da177e4 LT |
747 | |
748 | entry->buf_size = size; | |
749 | entry->page_order = page_order; | |
750 | ||
751 | offset = 0; | |
752 | ||
b5e89ed5 DA |
753 | while (entry->buf_count < count) { |
754 | buf = &entry->buflist[entry->buf_count]; | |
755 | buf->idx = dma->buf_count + entry->buf_count; | |
756 | buf->total = alignment; | |
757 | buf->order = order; | |
758 | buf->used = 0; | |
1da177e4 | 759 | |
b5e89ed5 | 760 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
761 | buf->bus_address = agp_offset + offset; |
762 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 763 | buf->next = NULL; |
1da177e4 LT |
764 | buf->waiting = 0; |
765 | buf->pending = 0; | |
6c340eac | 766 | buf->file_priv = NULL; |
1da177e4 LT |
767 | |
768 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 769 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 770 | if (!buf->dev_private) { |
1da177e4 LT |
771 | /* Set count correctly so we free the proper amount. */ |
772 | entry->buf_count = count; | |
b5e89ed5 | 773 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 774 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 775 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
776 | return -ENOMEM; |
777 | } | |
1da177e4 | 778 | |
b5e89ed5 | 779 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
780 | |
781 | offset += alignment; | |
782 | entry->buf_count++; | |
783 | byte_count += PAGE_SIZE << page_order; | |
784 | } | |
785 | ||
b5e89ed5 | 786 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 787 | |
9a298b2a EA |
788 | temp_buflist = krealloc(dma->buflist, |
789 | (dma->buf_count + entry->buf_count) * | |
790 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 791 | if (!temp_buflist) { |
1da177e4 | 792 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 793 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 794 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 795 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
796 | return -ENOMEM; |
797 | } | |
798 | dma->buflist = temp_buflist; | |
799 | ||
b5e89ed5 | 800 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
801 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
802 | } | |
803 | ||
804 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
805 | dma->seg_count += entry->seg_count; |
806 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
807 | dma->byte_count += byte_count; |
808 | ||
b5e89ed5 DA |
809 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
810 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 811 | |
30e2fb18 | 812 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 813 | |
d59431bf DA |
814 | request->count = entry->buf_count; |
815 | request->size = size; | |
1da177e4 LT |
816 | |
817 | dma->flags = _DRM_DMA_USE_AGP; | |
818 | ||
b5e89ed5 | 819 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
820 | return 0; |
821 | } | |
9fc5cde7 | 822 | EXPORT_SYMBOL(drm_legacy_addbufs_agp); |
a7fb8a23 | 823 | #endif /* CONFIG_AGP */ |
1da177e4 | 824 | |
9fc5cde7 DH |
825 | int drm_legacy_addbufs_pci(struct drm_device *dev, |
826 | struct drm_buf_desc *request) | |
1da177e4 | 827 | { |
cdd55a29 | 828 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
829 | int count; |
830 | int order; | |
831 | int size; | |
832 | int total; | |
833 | int page_order; | |
cdd55a29 | 834 | struct drm_buf_entry *entry; |
ddf19b97 | 835 | drm_dma_handle_t *dmah; |
056219e2 | 836 | struct drm_buf *buf; |
1da177e4 LT |
837 | int alignment; |
838 | unsigned long offset; | |
839 | int i; | |
840 | int byte_count; | |
841 | int page_count; | |
842 | unsigned long *temp_pagelist; | |
056219e2 | 843 | struct drm_buf **temp_buflist; |
1da177e4 | 844 | |
b5e89ed5 DA |
845 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
846 | return -EINVAL; | |
d985c108 | 847 | |
b5e89ed5 DA |
848 | if (!dma) |
849 | return -EINVAL; | |
1da177e4 | 850 | |
d985c108 DA |
851 | if (!capable(CAP_SYS_ADMIN)) |
852 | return -EPERM; | |
853 | ||
d59431bf | 854 | count = request->count; |
04420c9c | 855 | order = order_base_2(request->size); |
1da177e4 LT |
856 | size = 1 << order; |
857 | ||
a344a7e7 DV |
858 | DRM_DEBUG("count=%d, size=%d (%d), order=%d\n", |
859 | request->count, request->size, size, order); | |
1da177e4 | 860 | |
b5e89ed5 DA |
861 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
862 | return -EINVAL; | |
1da177e4 | 863 | |
d59431bf | 864 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 865 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
866 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
867 | total = PAGE_SIZE << page_order; | |
868 | ||
2177a218 | 869 | spin_lock(&dev->buf_lock); |
b5e89ed5 | 870 | if (dev->buf_use) { |
2177a218 | 871 | spin_unlock(&dev->buf_lock); |
1da177e4 LT |
872 | return -EBUSY; |
873 | } | |
b5e89ed5 | 874 | atomic_inc(&dev->buf_alloc); |
2177a218 | 875 | spin_unlock(&dev->buf_lock); |
1da177e4 | 876 | |
30e2fb18 | 877 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 878 | entry = &dma->bufs[order]; |
b5e89ed5 | 879 | if (entry->buf_count) { |
30e2fb18 | 880 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 881 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
882 | return -ENOMEM; /* May only call once for each order */ |
883 | } | |
884 | ||
885 | if (count < 0 || count > 4096) { | |
30e2fb18 | 886 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 887 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
888 | return -EINVAL; |
889 | } | |
890 | ||
94e3370e | 891 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 892 | if (!entry->buflist) { |
30e2fb18 | 893 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 894 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
895 | return -ENOMEM; |
896 | } | |
b5e89ed5 | 897 | |
94e3370e | 898 | entry->seglist = kzalloc(count * sizeof(*entry->seglist), GFP_KERNEL); |
b5e89ed5 | 899 | if (!entry->seglist) { |
9a298b2a | 900 | kfree(entry->buflist); |
30e2fb18 | 901 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 902 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
903 | return -ENOMEM; |
904 | } | |
1da177e4 LT |
905 | |
906 | /* Keep the original pagelist until we know all the allocations | |
907 | * have succeeded | |
908 | */ | |
9a298b2a EA |
909 | temp_pagelist = kmalloc((dma->page_count + (count << page_order)) * |
910 | sizeof(*dma->pagelist), GFP_KERNEL); | |
1da177e4 | 911 | if (!temp_pagelist) { |
9a298b2a EA |
912 | kfree(entry->buflist); |
913 | kfree(entry->seglist); | |
30e2fb18 | 914 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 915 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
916 | return -ENOMEM; |
917 | } | |
918 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
919 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
920 | DRM_DEBUG("pagelist: %d entries\n", | |
921 | dma->page_count + (count << page_order)); | |
1da177e4 | 922 | |
b5e89ed5 | 923 | entry->buf_size = size; |
1da177e4 LT |
924 | entry->page_order = page_order; |
925 | byte_count = 0; | |
926 | page_count = 0; | |
927 | ||
b5e89ed5 | 928 | while (entry->buf_count < count) { |
bc5f4523 | 929 | |
e6be8d9d | 930 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000); |
bc5f4523 | 931 | |
ddf19b97 | 932 | if (!dmah) { |
1da177e4 LT |
933 | /* Set count correctly so we free the proper amount. */ |
934 | entry->buf_count = count; | |
935 | entry->seg_count = count; | |
936 | drm_cleanup_buf_error(dev, entry); | |
9a298b2a | 937 | kfree(temp_pagelist); |
30e2fb18 | 938 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 939 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
940 | return -ENOMEM; |
941 | } | |
ddf19b97 | 942 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
943 | for (i = 0; i < (1 << page_order); i++) { |
944 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
945 | dma->page_count + page_count, | |
ddf19b97 | 946 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 947 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 948 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 949 | } |
b5e89ed5 DA |
950 | for (offset = 0; |
951 | offset + size <= total && entry->buf_count < count; | |
952 | offset += alignment, ++entry->buf_count) { | |
953 | buf = &entry->buflist[entry->buf_count]; | |
954 | buf->idx = dma->buf_count + entry->buf_count; | |
955 | buf->total = alignment; | |
956 | buf->order = order; | |
957 | buf->used = 0; | |
958 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
959 | buf->address = (void *)(dmah->vaddr + offset); |
960 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 961 | buf->next = NULL; |
1da177e4 LT |
962 | buf->waiting = 0; |
963 | buf->pending = 0; | |
6c340eac | 964 | buf->file_priv = NULL; |
1da177e4 LT |
965 | |
966 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e DB |
967 | buf->dev_private = kzalloc(buf->dev_priv_size, |
968 | GFP_KERNEL); | |
b5e89ed5 | 969 | if (!buf->dev_private) { |
1da177e4 LT |
970 | /* Set count correctly so we free the proper amount. */ |
971 | entry->buf_count = count; | |
972 | entry->seg_count = count; | |
b5e89ed5 | 973 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 974 | kfree(temp_pagelist); |
30e2fb18 | 975 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 976 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
977 | return -ENOMEM; |
978 | } | |
1da177e4 | 979 | |
b5e89ed5 DA |
980 | DRM_DEBUG("buffer %d @ %p\n", |
981 | entry->buf_count, buf->address); | |
1da177e4 LT |
982 | } |
983 | byte_count += PAGE_SIZE << page_order; | |
984 | } | |
985 | ||
9a298b2a EA |
986 | temp_buflist = krealloc(dma->buflist, |
987 | (dma->buf_count + entry->buf_count) * | |
988 | sizeof(*dma->buflist), GFP_KERNEL); | |
1da177e4 LT |
989 | if (!temp_buflist) { |
990 | /* Free the entry because it isn't valid */ | |
b5e89ed5 | 991 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 992 | kfree(temp_pagelist); |
30e2fb18 | 993 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 994 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
995 | return -ENOMEM; |
996 | } | |
997 | dma->buflist = temp_buflist; | |
998 | ||
b5e89ed5 | 999 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1000 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1001 | } | |
1002 | ||
88393161 | 1003 | /* No allocations failed, so now we can replace the original pagelist |
1da177e4 LT |
1004 | * with the new one. |
1005 | */ | |
1006 | if (dma->page_count) { | |
9a298b2a | 1007 | kfree(dma->pagelist); |
1da177e4 LT |
1008 | } |
1009 | dma->pagelist = temp_pagelist; | |
1010 | ||
1011 | dma->buf_count += entry->buf_count; | |
1012 | dma->seg_count += entry->seg_count; | |
1013 | dma->page_count += entry->seg_count << page_order; | |
1014 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
1015 | ||
30e2fb18 | 1016 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1017 | |
d59431bf DA |
1018 | request->count = entry->buf_count; |
1019 | request->size = size; | |
1da177e4 | 1020 | |
3417f33e GS |
1021 | if (request->flags & _DRM_PCI_BUFFER_RO) |
1022 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
1023 | ||
b5e89ed5 | 1024 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1025 | return 0; |
1026 | ||
1027 | } | |
9fc5cde7 | 1028 | EXPORT_SYMBOL(drm_legacy_addbufs_pci); |
1da177e4 | 1029 | |
9fc5cde7 DH |
1030 | static int drm_legacy_addbufs_sg(struct drm_device *dev, |
1031 | struct drm_buf_desc *request) | |
1da177e4 | 1032 | { |
cdd55a29 DA |
1033 | struct drm_device_dma *dma = dev->dma; |
1034 | struct drm_buf_entry *entry; | |
056219e2 | 1035 | struct drm_buf *buf; |
1da177e4 LT |
1036 | unsigned long offset; |
1037 | unsigned long agp_offset; | |
1038 | int count; | |
1039 | int order; | |
1040 | int size; | |
1041 | int alignment; | |
1042 | int page_order; | |
1043 | int total; | |
1044 | int byte_count; | |
1045 | int i; | |
056219e2 | 1046 | struct drm_buf **temp_buflist; |
1da177e4 | 1047 | |
b5e89ed5 DA |
1048 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
1049 | return -EINVAL; | |
1050 | ||
1051 | if (!dma) | |
1052 | return -EINVAL; | |
1da177e4 | 1053 | |
d985c108 DA |
1054 | if (!capable(CAP_SYS_ADMIN)) |
1055 | return -EPERM; | |
1056 | ||
d59431bf | 1057 | count = request->count; |
04420c9c | 1058 | order = order_base_2(request->size); |
1da177e4 LT |
1059 | size = 1 << order; |
1060 | ||
b5e89ed5 DA |
1061 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
1062 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
1063 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
1064 | total = PAGE_SIZE << page_order; | |
1065 | ||
1066 | byte_count = 0; | |
d59431bf | 1067 | agp_offset = request->agp_start; |
1da177e4 | 1068 | |
b5e89ed5 DA |
1069 | DRM_DEBUG("count: %d\n", count); |
1070 | DRM_DEBUG("order: %d\n", order); | |
1071 | DRM_DEBUG("size: %d\n", size); | |
1072 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1073 | DRM_DEBUG("alignment: %d\n", alignment); | |
1074 | DRM_DEBUG("page_order: %d\n", page_order); | |
1075 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1076 | |
b5e89ed5 DA |
1077 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1078 | return -EINVAL; | |
1da177e4 | 1079 | |
2177a218 | 1080 | spin_lock(&dev->buf_lock); |
b5e89ed5 | 1081 | if (dev->buf_use) { |
2177a218 | 1082 | spin_unlock(&dev->buf_lock); |
1da177e4 LT |
1083 | return -EBUSY; |
1084 | } | |
b5e89ed5 | 1085 | atomic_inc(&dev->buf_alloc); |
2177a218 | 1086 | spin_unlock(&dev->buf_lock); |
1da177e4 | 1087 | |
30e2fb18 | 1088 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1089 | entry = &dma->bufs[order]; |
b5e89ed5 | 1090 | if (entry->buf_count) { |
30e2fb18 | 1091 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1092 | atomic_dec(&dev->buf_alloc); |
1093 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1094 | } |
1095 | ||
1096 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1097 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1098 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1099 | return -EINVAL; |
1100 | } | |
1101 | ||
94e3370e | 1102 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1103 | GFP_KERNEL); |
b5e89ed5 | 1104 | if (!entry->buflist) { |
30e2fb18 | 1105 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1106 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1107 | return -ENOMEM; |
1108 | } | |
1da177e4 LT |
1109 | |
1110 | entry->buf_size = size; | |
1111 | entry->page_order = page_order; | |
1112 | ||
1113 | offset = 0; | |
1114 | ||
b5e89ed5 DA |
1115 | while (entry->buf_count < count) { |
1116 | buf = &entry->buflist[entry->buf_count]; | |
1117 | buf->idx = dma->buf_count + entry->buf_count; | |
1118 | buf->total = alignment; | |
1119 | buf->order = order; | |
1120 | buf->used = 0; | |
1da177e4 | 1121 | |
b5e89ed5 | 1122 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1123 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1124 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1125 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1126 | buf->next = NULL; |
1da177e4 LT |
1127 | buf->waiting = 0; |
1128 | buf->pending = 0; | |
6c340eac | 1129 | buf->file_priv = NULL; |
1da177e4 LT |
1130 | |
1131 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1132 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 1133 | if (!buf->dev_private) { |
1da177e4 LT |
1134 | /* Set count correctly so we free the proper amount. */ |
1135 | entry->buf_count = count; | |
b5e89ed5 | 1136 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1137 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1138 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1139 | return -ENOMEM; |
1140 | } | |
1141 | ||
b5e89ed5 | 1142 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1143 | |
1144 | offset += alignment; | |
1145 | entry->buf_count++; | |
1146 | byte_count += PAGE_SIZE << page_order; | |
1147 | } | |
1148 | ||
b5e89ed5 | 1149 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1150 | |
9a298b2a EA |
1151 | temp_buflist = krealloc(dma->buflist, |
1152 | (dma->buf_count + entry->buf_count) * | |
1153 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 1154 | if (!temp_buflist) { |
1da177e4 | 1155 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1156 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1157 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1158 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1159 | return -ENOMEM; |
1160 | } | |
1161 | dma->buflist = temp_buflist; | |
1162 | ||
b5e89ed5 | 1163 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1164 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1165 | } | |
1166 | ||
1167 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1168 | dma->seg_count += entry->seg_count; |
1169 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1170 | dma->byte_count += byte_count; |
1171 | ||
b5e89ed5 DA |
1172 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1173 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1174 | |
30e2fb18 | 1175 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1176 | |
d59431bf DA |
1177 | request->count = entry->buf_count; |
1178 | request->size = size; | |
1da177e4 LT |
1179 | |
1180 | dma->flags = _DRM_DMA_USE_SG; | |
1181 | ||
b5e89ed5 | 1182 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1183 | return 0; |
1184 | } | |
1185 | ||
1186 | /** | |
1187 | * Add buffers for DMA transfers (ioctl). | |
1188 | * | |
1189 | * \param inode device inode. | |
6c340eac | 1190 | * \param file_priv DRM file private. |
1da177e4 | 1191 | * \param cmd command. |
c60ce623 | 1192 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1193 | * \return zero on success or a negative number on failure. |
1194 | * | |
1195 | * According with the memory type specified in drm_buf_desc::flags and the | |
1196 | * build options, it dispatches the call either to addbufs_agp(), | |
1197 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1198 | * PCI memory respectively. | |
1199 | */ | |
9fc5cde7 DH |
1200 | int drm_legacy_addbufs(struct drm_device *dev, void *data, |
1201 | struct drm_file *file_priv) | |
1da177e4 | 1202 | { |
c153f45f | 1203 | struct drm_buf_desc *request = data; |
d59431bf | 1204 | int ret; |
b5e89ed5 | 1205 | |
8d38c4b4 DV |
1206 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1207 | return -EINVAL; | |
1208 | ||
1da177e4 LT |
1209 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1210 | return -EINVAL; | |
1211 | ||
a7fb8a23 | 1212 | #if IS_ENABLED(CONFIG_AGP) |
c153f45f | 1213 | if (request->flags & _DRM_AGP_BUFFER) |
9fc5cde7 | 1214 | ret = drm_legacy_addbufs_agp(dev, request); |
1da177e4 LT |
1215 | else |
1216 | #endif | |
c153f45f | 1217 | if (request->flags & _DRM_SG_BUFFER) |
9fc5cde7 | 1218 | ret = drm_legacy_addbufs_sg(dev, request); |
c153f45f | 1219 | else if (request->flags & _DRM_FB_BUFFER) |
687fbb2e | 1220 | ret = -EINVAL; |
1da177e4 | 1221 | else |
9fc5cde7 | 1222 | ret = drm_legacy_addbufs_pci(dev, request); |
d59431bf | 1223 | |
d59431bf | 1224 | return ret; |
1da177e4 LT |
1225 | } |
1226 | ||
1da177e4 LT |
1227 | /** |
1228 | * Get information about the buffer mappings. | |
1229 | * | |
1230 | * This was originally mean for debugging purposes, or by a sophisticated | |
1231 | * client library to determine how best to use the available buffers (e.g., | |
1232 | * large buffers can be used for image transfer). | |
1233 | * | |
1234 | * \param inode device inode. | |
6c340eac | 1235 | * \param file_priv DRM file private. |
1da177e4 LT |
1236 | * \param cmd command. |
1237 | * \param arg pointer to a drm_buf_info structure. | |
1238 | * \return zero on success or a negative number on failure. | |
1239 | * | |
2177a218 | 1240 | * Increments drm_device::buf_use while holding the drm_device::buf_lock |
1da177e4 LT |
1241 | * lock, preventing of allocating more buffers after this call. Information |
1242 | * about each requested buffer is then copied into user space. | |
1243 | */ | |
9fc5cde7 DH |
1244 | int drm_legacy_infobufs(struct drm_device *dev, void *data, |
1245 | struct drm_file *file_priv) | |
1da177e4 | 1246 | { |
cdd55a29 | 1247 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1248 | struct drm_buf_info *request = data; |
1da177e4 LT |
1249 | int i; |
1250 | int count; | |
1251 | ||
8d38c4b4 DV |
1252 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1253 | return -EINVAL; | |
1254 | ||
1da177e4 LT |
1255 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1256 | return -EINVAL; | |
1257 | ||
b5e89ed5 DA |
1258 | if (!dma) |
1259 | return -EINVAL; | |
1da177e4 | 1260 | |
2177a218 | 1261 | spin_lock(&dev->buf_lock); |
b5e89ed5 | 1262 | if (atomic_read(&dev->buf_alloc)) { |
2177a218 | 1263 | spin_unlock(&dev->buf_lock); |
1da177e4 LT |
1264 | return -EBUSY; |
1265 | } | |
1266 | ++dev->buf_use; /* Can't allocate more after this call */ | |
2177a218 | 1267 | spin_unlock(&dev->buf_lock); |
1da177e4 | 1268 | |
b5e89ed5 DA |
1269 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1270 | if (dma->bufs[i].buf_count) | |
1271 | ++count; | |
1da177e4 LT |
1272 | } |
1273 | ||
b5e89ed5 | 1274 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1275 | |
c153f45f | 1276 | if (request->count >= count) { |
b5e89ed5 DA |
1277 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1278 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1279 | struct drm_buf_desc __user *to = |
c153f45f | 1280 | &request->list[count]; |
cdd55a29 | 1281 | struct drm_buf_entry *from = &dma->bufs[i]; |
b5e89ed5 DA |
1282 | if (copy_to_user(&to->count, |
1283 | &from->buf_count, | |
1284 | sizeof(from->buf_count)) || | |
1285 | copy_to_user(&to->size, | |
1286 | &from->buf_size, | |
1287 | sizeof(from->buf_size)) || | |
1288 | copy_to_user(&to->low_mark, | |
b008c0fc DH |
1289 | &from->low_mark, |
1290 | sizeof(from->low_mark)) || | |
b5e89ed5 | 1291 | copy_to_user(&to->high_mark, |
b008c0fc DH |
1292 | &from->high_mark, |
1293 | sizeof(from->high_mark))) | |
1da177e4 LT |
1294 | return -EFAULT; |
1295 | ||
b5e89ed5 DA |
1296 | DRM_DEBUG("%d %d %d %d %d\n", |
1297 | i, | |
1298 | dma->bufs[i].buf_count, | |
1299 | dma->bufs[i].buf_size, | |
b008c0fc DH |
1300 | dma->bufs[i].low_mark, |
1301 | dma->bufs[i].high_mark); | |
1da177e4 LT |
1302 | ++count; |
1303 | } | |
1304 | } | |
1305 | } | |
c153f45f | 1306 | request->count = count; |
1da177e4 LT |
1307 | |
1308 | return 0; | |
1309 | } | |
1310 | ||
1311 | /** | |
1312 | * Specifies a low and high water mark for buffer allocation | |
1313 | * | |
1314 | * \param inode device inode. | |
6c340eac | 1315 | * \param file_priv DRM file private. |
1da177e4 LT |
1316 | * \param cmd command. |
1317 | * \param arg a pointer to a drm_buf_desc structure. | |
1318 | * \return zero on success or a negative number on failure. | |
1319 | * | |
1320 | * Verifies that the size order is bounded between the admissible orders and | |
1321 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1322 | * | |
1323 | * \note This ioctl is deprecated and mostly never used. | |
1324 | */ | |
9fc5cde7 DH |
1325 | int drm_legacy_markbufs(struct drm_device *dev, void *data, |
1326 | struct drm_file *file_priv) | |
1da177e4 | 1327 | { |
cdd55a29 | 1328 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1329 | struct drm_buf_desc *request = data; |
1da177e4 | 1330 | int order; |
cdd55a29 | 1331 | struct drm_buf_entry *entry; |
1da177e4 | 1332 | |
8d38c4b4 DV |
1333 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1334 | return -EINVAL; | |
1335 | ||
1da177e4 LT |
1336 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1337 | return -EINVAL; | |
1338 | ||
b5e89ed5 DA |
1339 | if (!dma) |
1340 | return -EINVAL; | |
1da177e4 | 1341 | |
b5e89ed5 | 1342 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f | 1343 | request->size, request->low_mark, request->high_mark); |
04420c9c | 1344 | order = order_base_2(request->size); |
b5e89ed5 DA |
1345 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1346 | return -EINVAL; | |
1da177e4 LT |
1347 | entry = &dma->bufs[order]; |
1348 | ||
c153f45f | 1349 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1350 | return -EINVAL; |
c153f45f | 1351 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1352 | return -EINVAL; |
1353 | ||
b008c0fc DH |
1354 | entry->low_mark = request->low_mark; |
1355 | entry->high_mark = request->high_mark; | |
1da177e4 LT |
1356 | |
1357 | return 0; | |
1358 | } | |
1359 | ||
1360 | /** | |
b5e89ed5 | 1361 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1362 | * |
1363 | * \param inode device inode. | |
6c340eac | 1364 | * \param file_priv DRM file private. |
1da177e4 LT |
1365 | * \param cmd command. |
1366 | * \param arg pointer to a drm_buf_free structure. | |
1367 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1368 | * |
1da177e4 LT |
1369 | * Calls free_buffer() for each used buffer. |
1370 | * This function is primarily used for debugging. | |
1371 | */ | |
9fc5cde7 DH |
1372 | int drm_legacy_freebufs(struct drm_device *dev, void *data, |
1373 | struct drm_file *file_priv) | |
1da177e4 | 1374 | { |
cdd55a29 | 1375 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1376 | struct drm_buf_free *request = data; |
1da177e4 LT |
1377 | int i; |
1378 | int idx; | |
056219e2 | 1379 | struct drm_buf *buf; |
1da177e4 | 1380 | |
8d38c4b4 DV |
1381 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1382 | return -EINVAL; | |
1383 | ||
1da177e4 LT |
1384 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1385 | return -EINVAL; | |
1386 | ||
b5e89ed5 DA |
1387 | if (!dma) |
1388 | return -EINVAL; | |
1da177e4 | 1389 | |
c153f45f EA |
1390 | DRM_DEBUG("%d\n", request->count); |
1391 | for (i = 0; i < request->count; i++) { | |
1392 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1393 | return -EFAULT; |
b5e89ed5 DA |
1394 | if (idx < 0 || idx >= dma->buf_count) { |
1395 | DRM_ERROR("Index %d (of %d max)\n", | |
1396 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1397 | return -EINVAL; |
1398 | } | |
1399 | buf = dma->buflist[idx]; | |
6c340eac | 1400 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1401 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1402 | task_pid_nr(current)); |
1da177e4 LT |
1403 | return -EINVAL; |
1404 | } | |
a266162a | 1405 | drm_legacy_free_buffer(dev, buf); |
1da177e4 LT |
1406 | } |
1407 | ||
1408 | return 0; | |
1409 | } | |
1410 | ||
1411 | /** | |
1412 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1413 | * | |
1414 | * \param inode device inode. | |
6c340eac | 1415 | * \param file_priv DRM file private. |
1da177e4 LT |
1416 | * \param cmd command. |
1417 | * \param arg pointer to a drm_buf_map structure. | |
1418 | * \return zero on success or a negative number on failure. | |
1419 | * | |
6be5ceb0 LT |
1420 | * Maps the AGP, SG or PCI buffer region with vm_mmap(), and copies information |
1421 | * about each buffer into user space. For PCI buffers, it calls vm_mmap() with | |
3417f33e GS |
1422 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls |
1423 | * drm_mmap_dma(). | |
1da177e4 | 1424 | */ |
9fc5cde7 DH |
1425 | int drm_legacy_mapbufs(struct drm_device *dev, void *data, |
1426 | struct drm_file *file_priv) | |
1da177e4 | 1427 | { |
cdd55a29 | 1428 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1429 | int retcode = 0; |
1430 | const int zero = 0; | |
1431 | unsigned long virtual; | |
1432 | unsigned long address; | |
c153f45f | 1433 | struct drm_buf_map *request = data; |
1da177e4 LT |
1434 | int i; |
1435 | ||
8d38c4b4 DV |
1436 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
1437 | return -EINVAL; | |
1438 | ||
1da177e4 LT |
1439 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1440 | return -EINVAL; | |
1441 | ||
b5e89ed5 DA |
1442 | if (!dma) |
1443 | return -EINVAL; | |
1da177e4 | 1444 | |
2177a218 | 1445 | spin_lock(&dev->buf_lock); |
b5e89ed5 | 1446 | if (atomic_read(&dev->buf_alloc)) { |
2177a218 | 1447 | spin_unlock(&dev->buf_lock); |
1da177e4 LT |
1448 | return -EBUSY; |
1449 | } | |
1450 | dev->buf_use++; /* Can't allocate more after this call */ | |
2177a218 | 1451 | spin_unlock(&dev->buf_lock); |
1da177e4 | 1452 | |
c153f45f | 1453 | if (request->count >= dma->buf_count) { |
d9906753 | 1454 | if ((dev->agp && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1455 | || (drm_core_check_feature(dev, DRIVER_SG) |
687fbb2e | 1456 | && (dma->flags & _DRM_DMA_USE_SG))) { |
f77d390c | 1457 | struct drm_local_map *map = dev->agp_buffer_map; |
d1f2b55a | 1458 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1459 | |
b5e89ed5 | 1460 | if (!map) { |
1da177e4 LT |
1461 | retcode = -EINVAL; |
1462 | goto done; | |
1463 | } | |
6be5ceb0 | 1464 | virtual = vm_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1465 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1466 | MAP_SHARED, |
1467 | token); | |
1da177e4 | 1468 | } else { |
6be5ceb0 | 1469 | virtual = vm_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1470 | PROT_READ | PROT_WRITE, |
1471 | MAP_SHARED, 0); | |
1da177e4 | 1472 | } |
b5e89ed5 | 1473 | if (virtual > -1024UL) { |
1da177e4 LT |
1474 | /* Real error */ |
1475 | retcode = (signed long)virtual; | |
1476 | goto done; | |
1477 | } | |
c153f45f | 1478 | request->virtual = (void __user *)virtual; |
1da177e4 | 1479 | |
b5e89ed5 | 1480 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1481 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1482 | &dma->buflist[i]->idx, |
c153f45f | 1483 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1484 | retcode = -EFAULT; |
1485 | goto done; | |
1486 | } | |
c153f45f | 1487 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1488 | &dma->buflist[i]->total, |
c153f45f | 1489 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1490 | retcode = -EFAULT; |
1491 | goto done; | |
1492 | } | |
c153f45f | 1493 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1494 | &zero, sizeof(zero))) { |
1da177e4 LT |
1495 | retcode = -EFAULT; |
1496 | goto done; | |
1497 | } | |
b5e89ed5 | 1498 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1499 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1500 | &address, sizeof(address))) { |
1da177e4 LT |
1501 | retcode = -EFAULT; |
1502 | goto done; | |
1503 | } | |
1504 | } | |
1505 | } | |
b5e89ed5 | 1506 | done: |
c153f45f EA |
1507 | request->count = dma->buf_count; |
1508 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1509 | |
1510 | return retcode; | |
1511 | } | |
1512 | ||
9fc5cde7 | 1513 | int drm_legacy_dma_ioctl(struct drm_device *dev, void *data, |
6eb9278a DV |
1514 | struct drm_file *file_priv) |
1515 | { | |
1516 | if (drm_core_check_feature(dev, DRIVER_MODESET)) | |
1517 | return -EINVAL; | |
1518 | ||
1519 | if (dev->driver->dma_ioctl) | |
1520 | return dev->driver->dma_ioctl(dev, data, file_priv); | |
1521 | else | |
1522 | return -EINVAL; | |
1523 | } | |
1524 | ||
9fc5cde7 | 1525 | struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev) |
bd0c0cee DV |
1526 | { |
1527 | struct drm_map_list *entry; | |
1528 | ||
1529 | list_for_each_entry(entry, &dev->maplist, head) { | |
1530 | if (entry->map && entry->map->type == _DRM_SHM && | |
1531 | (entry->map->flags & _DRM_CONTAINS_LOCK)) { | |
1532 | return entry->map; | |
1533 | } | |
1534 | } | |
1535 | return NULL; | |
1536 | } | |
9fc5cde7 | 1537 | EXPORT_SYMBOL(drm_legacy_getsarea); |