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 | ||
2d1a8a48 | 31 | #include <linux/export.h> |
0500c04e SR |
32 | #include <linux/log2.h> |
33 | #include <linux/mm.h> | |
34 | #include <linux/mman.h> | |
35 | #include <linux/nospec.h> | |
625c18d7 | 36 | #include <linux/pci.h> |
0500c04e SR |
37 | #include <linux/slab.h> |
38 | #include <linux/uaccess.h> | |
39 | #include <linux/vmalloc.h> | |
40 | ||
f1a2a9b6 | 41 | #include <asm/shmparam.h> |
0500c04e | 42 | |
0500c04e SR |
43 | #include <drm/drm_device.h> |
44 | #include <drm/drm_drv.h> | |
45 | #include <drm/drm_file.h> | |
0500c04e SR |
46 | #include <drm/drm_print.h> |
47 | ||
9fc5cde7 | 48 | #include "drm_legacy.h" |
1da177e4 | 49 | |
a3780509 | 50 | |
55910517 | 51 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
f77d390c | 52 | struct drm_local_map *map) |
836cf046 | 53 | { |
55910517 | 54 | struct drm_map_list *entry; |
948de842 | 55 | |
bd1b331f | 56 | list_for_each_entry(entry, &dev->maplist, head) { |
41c2e75e BH |
57 | /* |
58 | * Because the kernel-userspace ABI is fixed at a 32-bit offset | |
66aa6962 TV |
59 | * while PCI resources may live above that, we only compare the |
60 | * lower 32 bits of the map offset for maps of type | |
61 | * _DRM_FRAMEBUFFER or _DRM_REGISTERS. | |
62 | * It is assumed that if a driver have more than one resource | |
63 | * of each type, the lower 32 bits are different. | |
41c2e75e BH |
64 | */ |
65 | if (!entry->map || | |
66 | map->type != entry->map->type || | |
95c081c1 | 67 | entry->master != dev->master) |
41c2e75e BH |
68 | continue; |
69 | switch (map->type) { | |
70 | case _DRM_SHM: | |
71 | if (map->flags != _DRM_CONTAINS_LOCK) | |
72 | break; | |
66aa6962 | 73 | return entry; |
41c2e75e BH |
74 | case _DRM_REGISTERS: |
75 | case _DRM_FRAME_BUFFER: | |
66aa6962 TV |
76 | if ((entry->map->offset & 0xffffffff) == |
77 | (map->offset & 0xffffffff)) | |
78 | return entry; | |
8ce9daf8 | 79 | break; |
41c2e75e | 80 | default: /* Make gcc happy */ |
42be7ca1 | 81 | break; |
836cf046 | 82 | } |
41c2e75e BH |
83 | if (entry->map->offset == map->offset) |
84 | return entry; | |
836cf046 DA |
85 | } |
86 | ||
87 | return NULL; | |
1da177e4 | 88 | } |
1da177e4 | 89 | |
e0be428e | 90 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
f1a2a9b6 | 91 | unsigned long user_token, int hashed_handle, int shm) |
d1f2b55a | 92 | { |
f1a2a9b6 DM |
93 | int use_hashed_handle, shift; |
94 | unsigned long add; | |
95 | ||
c2604ce0 | 96 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
97 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
98 | #elif (BITS_PER_LONG == 32) | |
99 | use_hashed_handle = hashed_handle; | |
100 | #else | |
101 | #error Unsupported long size. Neither 64 nor 32 bits. | |
102 | #endif | |
d1f2b55a | 103 | |
e08870c8 TH |
104 | if (!use_hashed_handle) { |
105 | int ret; | |
948de842 | 106 | |
1545085a | 107 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
108 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
109 | if (ret != -EINVAL) | |
110 | return ret; | |
d1f2b55a | 111 | } |
f1a2a9b6 DM |
112 | |
113 | shift = 0; | |
114 | add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT; | |
115 | if (shm && (SHMLBA > PAGE_SIZE)) { | |
116 | int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1; | |
117 | ||
118 | /* For shared memory, we have to preserve the SHMLBA | |
119 | * bits of the eventual vma->vm_pgoff value during | |
120 | * mmap(). Otherwise we run into cache aliasing problems | |
121 | * on some platforms. On these platforms, the pgoff of | |
122 | * a mmap() request is used to pick a suitable virtual | |
123 | * address for the mmap() region such that it will not | |
124 | * cause cache aliasing problems. | |
125 | * | |
126 | * Therefore, make sure the SHMLBA relevant bits of the | |
127 | * hash value we use are equal to those in the original | |
128 | * kernel virtual address. | |
129 | */ | |
130 | shift = bits; | |
131 | add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL)); | |
132 | } | |
133 | ||
e08870c8 TH |
134 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
135 | user_token, 32 - PAGE_SHIFT - 3, | |
f1a2a9b6 | 136 | shift, add); |
d1f2b55a | 137 | } |
9a186645 | 138 | |
abee5491 | 139 | /* |
f77d390c BH |
140 | * Core function to create a range of memory available for mapping by a |
141 | * non-root process. | |
1da177e4 LT |
142 | * |
143 | * Adjusts the memory offset to its absolute value according to the mapping | |
144 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
145 | * applicable and if supported by the kernel. | |
146 | */ | |
2bcfcbfc | 147 | static int drm_addmap_core(struct drm_device *dev, resource_size_t offset, |
c60ce623 | 148 | unsigned int size, enum drm_map_type type, |
55910517 | 149 | enum drm_map_flags flags, |
2bcfcbfc | 150 | struct drm_map_list **maplist) |
1da177e4 | 151 | { |
f77d390c | 152 | struct drm_local_map *map; |
55910517 | 153 | struct drm_map_list *list; |
8d153f71 TH |
154 | unsigned long user_token; |
155 | int ret; | |
1da177e4 | 156 | |
9a298b2a | 157 | map = kmalloc(sizeof(*map), GFP_KERNEL); |
b5e89ed5 | 158 | if (!map) |
1da177e4 LT |
159 | return -ENOMEM; |
160 | ||
7ab98401 DA |
161 | map->offset = offset; |
162 | map->size = size; | |
163 | map->flags = flags; | |
164 | map->type = type; | |
1da177e4 LT |
165 | |
166 | /* Only allow shared memory to be removable since we only keep enough | |
167 | * book keeping information about shared memory to allow for removal | |
168 | * when processes fork. | |
169 | */ | |
b5e89ed5 | 170 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
9a298b2a | 171 | kfree(map); |
1da177e4 LT |
172 | return -EINVAL; |
173 | } | |
41c2e75e BH |
174 | DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n", |
175 | (unsigned long long)map->offset, map->size, map->type); | |
b6741377 BH |
176 | |
177 | /* page-align _DRM_SHM maps. They are allocated here so there is no security | |
178 | * hole created by that and it works around various broken drivers that use | |
179 | * a non-aligned quantity to map the SAREA. --BenH | |
180 | */ | |
181 | if (map->type == _DRM_SHM) | |
182 | map->size = PAGE_ALIGN(map->size); | |
183 | ||
41c2e75e | 184 | if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) { |
9a298b2a | 185 | kfree(map); |
1da177e4 LT |
186 | return -EINVAL; |
187 | } | |
b5e89ed5 | 188 | map->mtrr = -1; |
1da177e4 LT |
189 | map->handle = NULL; |
190 | ||
b5e89ed5 | 191 | switch (map->type) { |
1da177e4 LT |
192 | case _DRM_REGISTERS: |
193 | case _DRM_FRAME_BUFFER: | |
4b7fb9b5 | 194 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__arm__) |
8d2ea625 | 195 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 | 196 | map->offset < virt_to_phys(high_memory)) { |
9a298b2a | 197 | kfree(map); |
1da177e4 LT |
198 | return -EINVAL; |
199 | } | |
1da177e4 | 200 | #endif |
836cf046 DA |
201 | /* Some drivers preinitialize some maps, without the X Server |
202 | * needing to be aware of it. Therefore, we just return success | |
203 | * when the server tries to create a duplicate map. | |
204 | */ | |
89625eb1 DA |
205 | list = drm_find_matching_map(dev, map); |
206 | if (list != NULL) { | |
207 | if (list->map->size != map->size) { | |
836cf046 | 208 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
209 | "mismatched sizes, (%ld vs %ld)\n", |
210 | map->type, map->size, | |
211 | list->map->size); | |
89625eb1 | 212 | list->map->size = map->size; |
836cf046 DA |
213 | } |
214 | ||
9a298b2a | 215 | kfree(map); |
89625eb1 | 216 | *maplist = list; |
836cf046 DA |
217 | return 0; |
218 | } | |
219 | ||
28185647 DV |
220 | if (map->type == _DRM_FRAME_BUFFER || |
221 | (map->flags & _DRM_WRITE_COMBINING)) { | |
222 | map->mtrr = | |
223 | arch_phys_wc_add(map->offset, map->size); | |
1da177e4 | 224 | } |
0769d39c | 225 | if (map->type == _DRM_REGISTERS) { |
ff47eaf2 AL |
226 | if (map->flags & _DRM_WRITE_COMBINING) |
227 | map->handle = ioremap_wc(map->offset, | |
228 | map->size); | |
229 | else | |
230 | map->handle = ioremap(map->offset, map->size); | |
0769d39c | 231 | if (!map->handle) { |
9a298b2a | 232 | kfree(map); |
0769d39c ST |
233 | return -ENOMEM; |
234 | } | |
235 | } | |
bc5f4523 | 236 | |
1da177e4 | 237 | break; |
1da177e4 | 238 | case _DRM_SHM: |
54ba2f76 DA |
239 | list = drm_find_matching_map(dev, map); |
240 | if (list != NULL) { | |
2bcfcbfc | 241 | if (list->map->size != map->size) { |
54ba2f76 DA |
242 | DRM_DEBUG("Matching maps of type %d with " |
243 | "mismatched sizes, (%ld vs %ld)\n", | |
244 | map->type, map->size, list->map->size); | |
245 | list->map->size = map->size; | |
246 | } | |
247 | ||
9a298b2a | 248 | kfree(map); |
54ba2f76 DA |
249 | *maplist = list; |
250 | return 0; | |
251 | } | |
f239b7b0 | 252 | map->handle = vmalloc_user(map->size); |
b5e89ed5 | 253 | DRM_DEBUG("%lu %d %p\n", |
04420c9c | 254 | map->size, order_base_2(map->size), map->handle); |
b5e89ed5 | 255 | if (!map->handle) { |
9a298b2a | 256 | kfree(map); |
1da177e4 LT |
257 | return -ENOMEM; |
258 | } | |
259 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 260 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 261 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
95c081c1 | 262 | if (dev->master->lock.hw_lock != NULL) { |
b5e89ed5 | 263 | vfree(map->handle); |
9a298b2a | 264 | kfree(map); |
1da177e4 LT |
265 | return -EBUSY; |
266 | } | |
95c081c1 | 267 | dev->sigdata.lock = dev->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
268 | } |
269 | break; | |
54ba2f76 | 270 | case _DRM_AGP: { |
55910517 | 271 | struct drm_agp_mem *entry; |
54ba2f76 DA |
272 | int valid = 0; |
273 | ||
d9906753 | 274 | if (!dev->agp) { |
9a298b2a | 275 | kfree(map); |
54ba2f76 DA |
276 | return -EINVAL; |
277 | } | |
1da177e4 | 278 | #ifdef __alpha__ |
54ba2f76 | 279 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 280 | #endif |
47a184a8 EA |
281 | /* In some cases (i810 driver), user space may have already |
282 | * added the AGP base itself, because dev->agp->base previously | |
283 | * only got set during AGP enable. So, only add the base | |
284 | * address if the map's offset isn't already within the | |
285 | * aperture. | |
54ba2f76 | 286 | */ |
47a184a8 EA |
287 | if (map->offset < dev->agp->base || |
288 | map->offset > dev->agp->base + | |
289 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
290 | map->offset += dev->agp->base; | |
291 | } | |
54ba2f76 DA |
292 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
293 | ||
294 | /* This assumes the DRM is in total control of AGP space. | |
295 | * It's not always the case as AGP can be in the control | |
296 | * of user space (i.e. i810 driver). So this loop will get | |
297 | * skipped and we double check that dev->agp->memory is | |
298 | * actually set as well as being invalid before EPERM'ing | |
299 | */ | |
bd1b331f | 300 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
301 | if ((map->offset >= entry->bound) && |
302 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
303 | valid = 1; | |
304 | break; | |
305 | } | |
1da177e4 | 306 | } |
bd1b331f | 307 | if (!list_empty(&dev->agp->memory) && !valid) { |
9a298b2a | 308 | kfree(map); |
54ba2f76 DA |
309 | return -EPERM; |
310 | } | |
41c2e75e BH |
311 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
312 | (unsigned long long)map->offset, map->size); | |
54ba2f76 | 313 | |
a2c0a97b | 314 | break; |
812c369d | 315 | } |
1da177e4 LT |
316 | case _DRM_SCATTER_GATHER: |
317 | if (!dev->sg) { | |
9a298b2a | 318 | kfree(map); |
1da177e4 LT |
319 | return -EINVAL; |
320 | } | |
d1f2b55a | 321 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 322 | break; |
b5e89ed5 | 323 | case _DRM_CONSISTENT: |
2d0f9eaf | 324 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 325 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf | 326 | * casting it down to 32 bits is no problem, but we |
ad6ce32a BMC |
327 | * need to point to a 64bit variable first. |
328 | */ | |
36b73b05 | 329 | map->handle = dma_alloc_coherent(dev->dev, |
8e4ff9b5 CW |
330 | map->size, |
331 | &map->offset, | |
332 | GFP_KERNEL); | |
333 | if (!map->handle) { | |
9a298b2a | 334 | kfree(map); |
2d0f9eaf DA |
335 | return -ENOMEM; |
336 | } | |
337 | break; | |
1da177e4 | 338 | default: |
9a298b2a | 339 | kfree(map); |
1da177e4 LT |
340 | return -EINVAL; |
341 | } | |
342 | ||
94e3370e | 343 | list = kzalloc(sizeof(*list), GFP_KERNEL); |
b5e89ed5 | 344 | if (!list) { |
85abb3f9 | 345 | if (map->type == _DRM_REGISTERS) |
004a7727 | 346 | iounmap(map->handle); |
9a298b2a | 347 | kfree(map); |
1da177e4 LT |
348 | return -EINVAL; |
349 | } | |
1da177e4 LT |
350 | list->map = map; |
351 | ||
30e2fb18 | 352 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 353 | list_add(&list->head, &dev->maplist); |
8d153f71 | 354 | |
d1f2b55a | 355 | /* Assign a 32-bit handle */ |
30e2fb18 | 356 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
357 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
358 | map->offset; | |
f1a2a9b6 DM |
359 | ret = drm_map_handle(dev, &list->hash, user_token, 0, |
360 | (map->type == _DRM_SHM)); | |
8d153f71 | 361 | if (ret) { |
85abb3f9 | 362 | if (map->type == _DRM_REGISTERS) |
004a7727 | 363 | iounmap(map->handle); |
9a298b2a EA |
364 | kfree(map); |
365 | kfree(list); | |
8d153f71 TH |
366 | mutex_unlock(&dev->struct_mutex); |
367 | return ret; | |
368 | } | |
369 | ||
1545085a | 370 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 371 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 372 | |
2ff2e8a3 | 373 | if (!(map->flags & _DRM_DRIVER)) |
95c081c1 | 374 | list->master = dev->master; |
89625eb1 | 375 | *maplist = list; |
7ab98401 | 376 | return 0; |
afe0f696 | 377 | } |
89625eb1 | 378 | |
2bcfcbfc | 379 | int drm_legacy_addmap(struct drm_device *dev, resource_size_t offset, |
9fc5cde7 DH |
380 | unsigned int size, enum drm_map_type type, |
381 | enum drm_map_flags flags, struct drm_local_map **map_ptr) | |
89625eb1 | 382 | { |
55910517 | 383 | struct drm_map_list *list; |
89625eb1 DA |
384 | int rc; |
385 | ||
386 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
387 | if (!rc) | |
388 | *map_ptr = list->map; | |
389 | return rc; | |
390 | } | |
9fc5cde7 | 391 | EXPORT_SYMBOL(drm_legacy_addmap); |
7ab98401 | 392 | |
c7642688 JN |
393 | struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, |
394 | unsigned int token) | |
395 | { | |
396 | struct drm_map_list *_entry; | |
948de842 | 397 | |
c7642688 JN |
398 | list_for_each_entry(_entry, &dev->maplist, head) |
399 | if (_entry->user_token == token) | |
400 | return _entry->map; | |
401 | return NULL; | |
402 | } | |
403 | EXPORT_SYMBOL(drm_legacy_findmap); | |
404 | ||
abee5491 | 405 | /* |
f77d390c BH |
406 | * Ioctl to specify a range of memory that is available for mapping by a |
407 | * non-root process. | |
408 | * | |
409 | * \param inode device inode. | |
410 | * \param file_priv DRM file private. | |
411 | * \param cmd command. | |
412 | * \param arg pointer to a drm_map structure. | |
413 | * \return zero on success or a negative value on error. | |
414 | * | |
415 | */ | |
9fc5cde7 DH |
416 | int drm_legacy_addmap_ioctl(struct drm_device *dev, void *data, |
417 | struct drm_file *file_priv) | |
7ab98401 | 418 | { |
c153f45f | 419 | struct drm_map *map = data; |
55910517 | 420 | struct drm_map_list *maplist; |
7ab98401 DA |
421 | int err; |
422 | ||
7c1c2871 | 423 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
424 | return -EPERM; |
425 | ||
e975eef0 | 426 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 427 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 428 | return -EOPNOTSUPP; |
e975eef0 | 429 | |
c153f45f EA |
430 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
431 | map->flags, &maplist); | |
7ab98401 | 432 | |
b5e89ed5 | 433 | if (err) |
7ab98401 | 434 | return err; |
d1f2b55a | 435 | |
67e1a014 | 436 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 437 | map->handle = (void *)(unsigned long)maplist->user_token; |
0dd99f1b AL |
438 | |
439 | /* | |
440 | * It appears that there are no users of this value whatsoever -- | |
441 | * drmAddMap just discards it. Let's not encourage its use. | |
442 | * (Keeping drm_addmap_core's returned mtrr value would be wrong -- | |
443 | * it's not a real mtrr index anymore.) | |
444 | */ | |
445 | map->mtrr = -1; | |
446 | ||
1da177e4 | 447 | return 0; |
88f399cd | 448 | } |
1da177e4 | 449 | |
ec1f52ef DV |
450 | /* |
451 | * Get a mapping information. | |
452 | * | |
453 | * \param inode device inode. | |
454 | * \param file_priv DRM file private. | |
455 | * \param cmd command. | |
456 | * \param arg user argument, pointing to a drm_map structure. | |
457 | * | |
458 | * \return zero on success or a negative number on failure. | |
459 | * | |
460 | * Searches for the mapping with the specified offset and copies its information | |
461 | * into userspace | |
462 | */ | |
463 | int drm_legacy_getmap_ioctl(struct drm_device *dev, void *data, | |
464 | struct drm_file *file_priv) | |
465 | { | |
466 | struct drm_map *map = data; | |
467 | struct drm_map_list *r_list = NULL; | |
468 | struct list_head *list; | |
469 | int idx; | |
470 | int i; | |
471 | ||
e975eef0 | 472 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 473 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 474 | return -EOPNOTSUPP; |
e975eef0 | 475 | |
ec1f52ef DV |
476 | idx = map->offset; |
477 | if (idx < 0) | |
478 | return -EINVAL; | |
479 | ||
480 | i = 0; | |
481 | mutex_lock(&dev->struct_mutex); | |
482 | list_for_each(list, &dev->maplist) { | |
483 | if (i == idx) { | |
484 | r_list = list_entry(list, struct drm_map_list, head); | |
485 | break; | |
486 | } | |
487 | i++; | |
488 | } | |
489 | if (!r_list || !r_list->map) { | |
490 | mutex_unlock(&dev->struct_mutex); | |
491 | return -EINVAL; | |
492 | } | |
493 | ||
494 | map->offset = r_list->map->offset; | |
495 | map->size = r_list->map->size; | |
496 | map->type = r_list->map->type; | |
497 | map->flags = r_list->map->flags; | |
498 | map->handle = (void *)(unsigned long) r_list->user_token; | |
499 | map->mtrr = arch_phys_wc_index(r_list->map->mtrr); | |
500 | ||
501 | mutex_unlock(&dev->struct_mutex); | |
502 | ||
503 | return 0; | |
504 | } | |
505 | ||
abee5491 | 506 | /* |
1da177e4 LT |
507 | * Remove a map private from list and deallocate resources if the mapping |
508 | * isn't in use. | |
509 | * | |
1da177e4 | 510 | * Searches the map on drm_device::maplist, removes it from the list, see if |
1e55a53a | 511 | * it's being used, and free any associated resource (such as MTRR's) if it's not |
1da177e4 LT |
512 | * being on use. |
513 | * | |
9fc5cde7 | 514 | * \sa drm_legacy_addmap |
1da177e4 | 515 | */ |
9fc5cde7 | 516 | int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 517 | { |
55910517 | 518 | struct drm_map_list *r_list = NULL, *list_t; |
bd1b331f | 519 | int found = 0; |
7c1c2871 | 520 | struct drm_master *master; |
1da177e4 | 521 | |
836cf046 | 522 | /* Find the list entry for the map and remove it */ |
bd1b331f | 523 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 524 | if (r_list->map == map) { |
7c1c2871 | 525 | master = r_list->master; |
bd1b331f | 526 | list_del(&r_list->head); |
1545085a TH |
527 | drm_ht_remove_key(&dev->map_hash, |
528 | r_list->user_token >> PAGE_SHIFT); | |
9a298b2a | 529 | kfree(r_list); |
bd1b331f | 530 | found = 1; |
836cf046 DA |
531 | break; |
532 | } | |
1da177e4 LT |
533 | } |
534 | ||
bd1b331f | 535 | if (!found) |
1da177e4 | 536 | return -EINVAL; |
1da177e4 | 537 | |
836cf046 DA |
538 | switch (map->type) { |
539 | case _DRM_REGISTERS: | |
004a7727 | 540 | iounmap(map->handle); |
df561f66 | 541 | fallthrough; |
836cf046 | 542 | case _DRM_FRAME_BUFFER: |
28185647 | 543 | arch_phys_wc_del(map->mtrr); |
836cf046 DA |
544 | break; |
545 | case _DRM_SHM: | |
546 | vfree(map->handle); | |
7c1c2871 DA |
547 | if (master) { |
548 | if (dev->sigdata.lock == master->lock.hw_lock) | |
549 | dev->sigdata.lock = NULL; | |
550 | master->lock.hw_lock = NULL; /* SHM removed */ | |
551 | master->lock.file_priv = NULL; | |
171901d1 | 552 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 553 | } |
836cf046 DA |
554 | break; |
555 | case _DRM_AGP: | |
556 | case _DRM_SCATTER_GATHER: | |
557 | break; | |
558 | case _DRM_CONSISTENT: | |
36b73b05 | 559 | dma_free_coherent(dev->dev, |
8e4ff9b5 CW |
560 | map->size, |
561 | map->handle, | |
562 | map->offset); | |
836cf046 | 563 | break; |
1da177e4 | 564 | } |
9a298b2a | 565 | kfree(map); |
836cf046 | 566 | |
1da177e4 LT |
567 | return 0; |
568 | } | |
9fc5cde7 | 569 | EXPORT_SYMBOL(drm_legacy_rmmap_locked); |
836cf046 | 570 | |
40647e45 | 571 | void drm_legacy_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 | 572 | { |
40647e45 | 573 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 574 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
40647e45 | 575 | return; |
836cf046 | 576 | |
30e2fb18 | 577 | mutex_lock(&dev->struct_mutex); |
40647e45 | 578 | drm_legacy_rmmap_locked(dev, map); |
30e2fb18 | 579 | mutex_unlock(&dev->struct_mutex); |
836cf046 | 580 | } |
9fc5cde7 | 581 | EXPORT_SYMBOL(drm_legacy_rmmap); |
7ab98401 | 582 | |
40647e45 DV |
583 | void drm_legacy_master_rmmaps(struct drm_device *dev, struct drm_master *master) |
584 | { | |
585 | struct drm_map_list *r_list, *list_temp; | |
586 | ||
fa538645 | 587 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
40647e45 DV |
588 | return; |
589 | ||
590 | mutex_lock(&dev->struct_mutex); | |
591 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { | |
592 | if (r_list->master == master) { | |
593 | drm_legacy_rmmap_locked(dev, r_list->map); | |
594 | r_list = NULL; | |
595 | } | |
596 | } | |
597 | mutex_unlock(&dev->struct_mutex); | |
598 | } | |
599 | ||
35a28021 DA |
600 | void drm_legacy_rmmaps(struct drm_device *dev) |
601 | { | |
602 | struct drm_map_list *r_list, *list_temp; | |
603 | ||
604 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) | |
605 | drm_legacy_rmmap(dev, r_list->map); | |
606 | } | |
607 | ||
836cf046 DA |
608 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
609 | * the last close of the device, and this is necessary for cleanup when things | |
610 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
611 | * like a pointless exercise since they're going away anyway. | |
612 | * | |
613 | * One use case might be after addmap is allowed for normal users for SHM and | |
614 | * gets used by drivers that the server doesn't need to care about. This seems | |
615 | * unlikely. | |
f77d390c BH |
616 | * |
617 | * \param inode device inode. | |
618 | * \param file_priv DRM file private. | |
619 | * \param cmd command. | |
620 | * \param arg pointer to a struct drm_map structure. | |
621 | * \return zero on success or a negative value on error. | |
836cf046 | 622 | */ |
9fc5cde7 DH |
623 | int drm_legacy_rmmap_ioctl(struct drm_device *dev, void *data, |
624 | struct drm_file *file_priv) | |
7ab98401 | 625 | { |
c153f45f | 626 | struct drm_map *request = data; |
f77d390c | 627 | struct drm_local_map *map = NULL; |
55910517 | 628 | struct drm_map_list *r_list; |
836cf046 | 629 | int ret; |
7ab98401 | 630 | |
e975eef0 | 631 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 632 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 633 | return -EOPNOTSUPP; |
e975eef0 | 634 | |
30e2fb18 | 635 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 636 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 637 | if (r_list->map && |
c153f45f | 638 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
639 | r_list->map->flags & _DRM_REMOVABLE) { |
640 | map = r_list->map; | |
641 | break; | |
642 | } | |
643 | } | |
644 | ||
1e55a53a | 645 | /* List has wrapped around to the head pointer, or it's empty we didn't |
836cf046 DA |
646 | * find anything. |
647 | */ | |
bd1b331f | 648 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 649 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
650 | return -EINVAL; |
651 | } | |
652 | ||
836cf046 DA |
653 | /* Register and framebuffer maps are permanent */ |
654 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 655 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
656 | return 0; |
657 | } | |
658 | ||
9fc5cde7 | 659 | ret = drm_legacy_rmmap_locked(dev, map); |
836cf046 | 660 | |
30e2fb18 | 661 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
662 | |
663 | return ret; | |
7ab98401 | 664 | } |
1da177e4 | 665 | |
abee5491 | 666 | /* |
1da177e4 LT |
667 | * Cleanup after an error on one of the addbufs() functions. |
668 | * | |
836cf046 | 669 | * \param dev DRM device. |
1da177e4 LT |
670 | * \param entry buffer entry where the error occurred. |
671 | * | |
672 | * Frees any pages and buffers associated with the given entry. | |
673 | */ | |
2bcfcbfc PM |
674 | static void drm_cleanup_buf_error(struct drm_device *dev, |
675 | struct drm_buf_entry *entry) | |
1da177e4 | 676 | { |
70556e24 | 677 | drm_dma_handle_t *dmah; |
1da177e4 LT |
678 | int i; |
679 | ||
680 | if (entry->seg_count) { | |
681 | for (i = 0; i < entry->seg_count; i++) { | |
682 | if (entry->seglist[i]) { | |
70556e24 JK |
683 | dmah = entry->seglist[i]; |
684 | dma_free_coherent(dev->dev, | |
685 | dmah->size, | |
686 | dmah->vaddr, | |
687 | dmah->busaddr); | |
5562f75c | 688 | kfree(dmah); |
1da177e4 LT |
689 | } |
690 | } | |
9a298b2a | 691 | kfree(entry->seglist); |
1da177e4 LT |
692 | |
693 | entry->seg_count = 0; | |
694 | } | |
695 | ||
b5e89ed5 DA |
696 | if (entry->buf_count) { |
697 | for (i = 0; i < entry->buf_count; i++) { | |
9a298b2a | 698 | kfree(entry->buflist[i].dev_private); |
1da177e4 | 699 | } |
9a298b2a | 700 | kfree(entry->buflist); |
1da177e4 LT |
701 | |
702 | entry->buf_count = 0; | |
703 | } | |
704 | } | |
705 | ||
a7fb8a23 | 706 | #if IS_ENABLED(CONFIG_AGP) |
abee5491 | 707 | /* |
d59431bf | 708 | * Add AGP buffers for DMA transfers. |
1da177e4 | 709 | * |
84b1fd10 | 710 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 711 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 712 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 713 | * |
1da177e4 LT |
714 | * After some sanity checks creates a drm_buf structure for each buffer and |
715 | * reallocates the buffer list of the same size order to accommodate the new | |
716 | * buffers. | |
717 | */ | |
9fc5cde7 DH |
718 | int drm_legacy_addbufs_agp(struct drm_device *dev, |
719 | struct drm_buf_desc *request) | |
1da177e4 | 720 | { |
cdd55a29 DA |
721 | struct drm_device_dma *dma = dev->dma; |
722 | struct drm_buf_entry *entry; | |
55910517 | 723 | struct drm_agp_mem *agp_entry; |
056219e2 | 724 | struct drm_buf *buf; |
1da177e4 LT |
725 | unsigned long offset; |
726 | unsigned long agp_offset; | |
727 | int count; | |
728 | int order; | |
729 | int size; | |
730 | int alignment; | |
731 | int page_order; | |
732 | int total; | |
733 | int byte_count; | |
54ba2f76 | 734 | int i, valid; |
056219e2 | 735 | struct drm_buf **temp_buflist; |
1da177e4 | 736 | |
b5e89ed5 DA |
737 | if (!dma) |
738 | return -EINVAL; | |
1da177e4 | 739 | |
d59431bf | 740 | count = request->count; |
04420c9c | 741 | order = order_base_2(request->size); |
1da177e4 LT |
742 | size = 1 << order; |
743 | ||
b5e89ed5 DA |
744 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
745 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
746 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
747 | total = PAGE_SIZE << page_order; | |
748 | ||
749 | byte_count = 0; | |
d59431bf | 750 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 751 | |
b5e89ed5 DA |
752 | DRM_DEBUG("count: %d\n", count); |
753 | DRM_DEBUG("order: %d\n", order); | |
754 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 755 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
756 | DRM_DEBUG("alignment: %d\n", alignment); |
757 | DRM_DEBUG("page_order: %d\n", page_order); | |
758 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 759 | |
b5e89ed5 DA |
760 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
761 | return -EINVAL; | |
1da177e4 | 762 | |
54ba2f76 DA |
763 | /* Make sure buffers are located in AGP memory that we own */ |
764 | valid = 0; | |
bd1b331f | 765 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
766 | if ((agp_offset >= agp_entry->bound) && |
767 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
768 | valid = 1; | |
769 | break; | |
770 | } | |
771 | } | |
bd1b331f | 772 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
773 | DRM_DEBUG("zone invalid\n"); |
774 | return -EINVAL; | |
775 | } | |
2177a218 | 776 | spin_lock(&dev->buf_lock); |
b5e89ed5 | 777 | if (dev->buf_use) { |
2177a218 | 778 | spin_unlock(&dev->buf_lock); |
1da177e4 LT |
779 | return -EBUSY; |
780 | } | |
b5e89ed5 | 781 | atomic_inc(&dev->buf_alloc); |
2177a218 | 782 | spin_unlock(&dev->buf_lock); |
1da177e4 | 783 | |
30e2fb18 | 784 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 785 | entry = &dma->bufs[order]; |
b5e89ed5 | 786 | if (entry->buf_count) { |
30e2fb18 | 787 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
788 | atomic_dec(&dev->buf_alloc); |
789 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
790 | } |
791 | ||
792 | if (count < 0 || count > 4096) { | |
30e2fb18 | 793 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 794 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
795 | return -EINVAL; |
796 | } | |
797 | ||
81a44137 | 798 | entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 799 | if (!entry->buflist) { |
30e2fb18 | 800 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 801 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
802 | return -ENOMEM; |
803 | } | |
1da177e4 LT |
804 | |
805 | entry->buf_size = size; | |
806 | entry->page_order = page_order; | |
807 | ||
808 | offset = 0; | |
809 | ||
b5e89ed5 DA |
810 | while (entry->buf_count < count) { |
811 | buf = &entry->buflist[entry->buf_count]; | |
812 | buf->idx = dma->buf_count + entry->buf_count; | |
813 | buf->total = alignment; | |
814 | buf->order = order; | |
815 | buf->used = 0; | |
1da177e4 | 816 | |
b5e89ed5 | 817 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
818 | buf->bus_address = agp_offset + offset; |
819 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 820 | buf->next = NULL; |
1da177e4 LT |
821 | buf->waiting = 0; |
822 | buf->pending = 0; | |
6c340eac | 823 | buf->file_priv = NULL; |
1da177e4 LT |
824 | |
825 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 826 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 827 | if (!buf->dev_private) { |
1da177e4 LT |
828 | /* Set count correctly so we free the proper amount. */ |
829 | entry->buf_count = count; | |
b5e89ed5 | 830 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 831 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 832 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
833 | return -ENOMEM; |
834 | } | |
1da177e4 | 835 | |
b5e89ed5 | 836 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
837 | |
838 | offset += alignment; | |
839 | entry->buf_count++; | |
840 | byte_count += PAGE_SIZE << page_order; | |
841 | } | |
842 | ||
b5e89ed5 | 843 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 844 | |
9a298b2a EA |
845 | temp_buflist = krealloc(dma->buflist, |
846 | (dma->buf_count + entry->buf_count) * | |
847 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 848 | if (!temp_buflist) { |
1da177e4 | 849 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 850 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 851 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 852 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
853 | return -ENOMEM; |
854 | } | |
855 | dma->buflist = temp_buflist; | |
856 | ||
b5e89ed5 | 857 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
858 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
859 | } | |
860 | ||
861 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
862 | dma->seg_count += entry->seg_count; |
863 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
864 | dma->byte_count += byte_count; |
865 | ||
b5e89ed5 DA |
866 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
867 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 868 | |
30e2fb18 | 869 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 870 | |
d59431bf DA |
871 | request->count = entry->buf_count; |
872 | request->size = size; | |
1da177e4 LT |
873 | |
874 | dma->flags = _DRM_DMA_USE_AGP; | |
875 | ||
b5e89ed5 | 876 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
877 | return 0; |
878 | } | |
9fc5cde7 | 879 | EXPORT_SYMBOL(drm_legacy_addbufs_agp); |
a7fb8a23 | 880 | #endif /* CONFIG_AGP */ |
1da177e4 | 881 | |
9fc5cde7 DH |
882 | int drm_legacy_addbufs_pci(struct drm_device *dev, |
883 | struct drm_buf_desc *request) | |
1da177e4 | 884 | { |
cdd55a29 | 885 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
886 | int count; |
887 | int order; | |
888 | int size; | |
889 | int total; | |
890 | int page_order; | |
cdd55a29 | 891 | struct drm_buf_entry *entry; |
ddf19b97 | 892 | drm_dma_handle_t *dmah; |
056219e2 | 893 | struct drm_buf *buf; |
1da177e4 LT |
894 | int alignment; |
895 | unsigned long offset; | |
896 | int i; | |
897 | int byte_count; | |
898 | int page_count; | |
899 | unsigned long *temp_pagelist; | |
056219e2 | 900 | struct drm_buf **temp_buflist; |
1da177e4 | 901 | |
b5e89ed5 | 902 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
69fdf420 | 903 | return -EOPNOTSUPP; |
d985c108 | 904 | |
b5e89ed5 DA |
905 | if (!dma) |
906 | return -EINVAL; | |
1da177e4 | 907 | |
d985c108 DA |
908 | if (!capable(CAP_SYS_ADMIN)) |
909 | return -EPERM; | |
910 | ||
d59431bf | 911 | count = request->count; |
04420c9c | 912 | order = order_base_2(request->size); |
1da177e4 LT |
913 | size = 1 << order; |
914 | ||
a344a7e7 DV |
915 | DRM_DEBUG("count=%d, size=%d (%d), order=%d\n", |
916 | request->count, request->size, size, order); | |
1da177e4 | 917 | |
b5e89ed5 DA |
918 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
919 | return -EINVAL; | |
1da177e4 | 920 | |
d59431bf | 921 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 922 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
923 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
924 | total = PAGE_SIZE << page_order; | |
925 | ||
2177a218 | 926 | spin_lock(&dev->buf_lock); |
b5e89ed5 | 927 | if (dev->buf_use) { |
2177a218 | 928 | spin_unlock(&dev->buf_lock); |
1da177e4 LT |
929 | return -EBUSY; |
930 | } | |
b5e89ed5 | 931 | atomic_inc(&dev->buf_alloc); |
2177a218 | 932 | spin_unlock(&dev->buf_lock); |
1da177e4 | 933 | |
30e2fb18 | 934 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 935 | entry = &dma->bufs[order]; |
b5e89ed5 | 936 | if (entry->buf_count) { |
30e2fb18 | 937 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 938 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
939 | return -ENOMEM; /* May only call once for each order */ |
940 | } | |
941 | ||
942 | if (count < 0 || count > 4096) { | |
30e2fb18 | 943 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 944 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
945 | return -EINVAL; |
946 | } | |
947 | ||
ed6dee41 | 948 | entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 949 | if (!entry->buflist) { |
30e2fb18 | 950 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 951 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
952 | return -ENOMEM; |
953 | } | |
b5e89ed5 | 954 | |
ed6dee41 | 955 | entry->seglist = kcalloc(count, sizeof(*entry->seglist), GFP_KERNEL); |
b5e89ed5 | 956 | if (!entry->seglist) { |
9a298b2a | 957 | kfree(entry->buflist); |
30e2fb18 | 958 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 959 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
960 | return -ENOMEM; |
961 | } | |
1da177e4 LT |
962 | |
963 | /* Keep the original pagelist until we know all the allocations | |
964 | * have succeeded | |
965 | */ | |
20274008 ME |
966 | temp_pagelist = kmalloc_array(dma->page_count + (count << page_order), |
967 | sizeof(*dma->pagelist), | |
968 | GFP_KERNEL); | |
1da177e4 | 969 | if (!temp_pagelist) { |
9a298b2a EA |
970 | kfree(entry->buflist); |
971 | kfree(entry->seglist); | |
30e2fb18 | 972 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 973 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
974 | return -ENOMEM; |
975 | } | |
976 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
977 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
978 | DRM_DEBUG("pagelist: %d entries\n", | |
979 | dma->page_count + (count << page_order)); | |
1da177e4 | 980 | |
b5e89ed5 | 981 | entry->buf_size = size; |
1da177e4 LT |
982 | entry->page_order = page_order; |
983 | byte_count = 0; | |
984 | page_count = 0; | |
985 | ||
b5e89ed5 | 986 | while (entry->buf_count < count) { |
70556e24 | 987 | dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL); |
ea8c9ed5 ZW |
988 | if (!dmah) { |
989 | /* Set count correctly so we free the proper amount. */ | |
990 | entry->buf_count = count; | |
991 | entry->seg_count = count; | |
992 | drm_cleanup_buf_error(dev, entry); | |
993 | kfree(temp_pagelist); | |
994 | mutex_unlock(&dev->struct_mutex); | |
995 | atomic_dec(&dev->buf_alloc); | |
70556e24 | 996 | return -ENOMEM; |
ea8c9ed5 | 997 | } |
bc5f4523 | 998 | |
70556e24 JK |
999 | dmah->size = total; |
1000 | dmah->vaddr = dma_alloc_coherent(dev->dev, | |
1001 | dmah->size, | |
1002 | &dmah->busaddr, | |
1003 | GFP_KERNEL); | |
1004 | if (!dmah->vaddr) { | |
1005 | kfree(dmah); | |
bc5f4523 | 1006 | |
1da177e4 LT |
1007 | /* Set count correctly so we free the proper amount. */ |
1008 | entry->buf_count = count; | |
1009 | entry->seg_count = count; | |
1010 | drm_cleanup_buf_error(dev, entry); | |
9a298b2a | 1011 | kfree(temp_pagelist); |
30e2fb18 | 1012 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1013 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1014 | return -ENOMEM; |
1015 | } | |
ddf19b97 | 1016 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
1017 | for (i = 0; i < (1 << page_order); i++) { |
1018 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
1019 | dma->page_count + page_count, | |
ddf19b97 | 1020 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 1021 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 1022 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 1023 | } |
b5e89ed5 DA |
1024 | for (offset = 0; |
1025 | offset + size <= total && entry->buf_count < count; | |
1026 | offset += alignment, ++entry->buf_count) { | |
1027 | buf = &entry->buflist[entry->buf_count]; | |
1028 | buf->idx = dma->buf_count + entry->buf_count; | |
1029 | buf->total = alignment; | |
1030 | buf->order = order; | |
1031 | buf->used = 0; | |
1032 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
1033 | buf->address = (void *)(dmah->vaddr + offset); |
1034 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 1035 | buf->next = NULL; |
1da177e4 LT |
1036 | buf->waiting = 0; |
1037 | buf->pending = 0; | |
6c340eac | 1038 | buf->file_priv = NULL; |
1da177e4 LT |
1039 | |
1040 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e DB |
1041 | buf->dev_private = kzalloc(buf->dev_priv_size, |
1042 | GFP_KERNEL); | |
b5e89ed5 | 1043 | if (!buf->dev_private) { |
1da177e4 LT |
1044 | /* Set count correctly so we free the proper amount. */ |
1045 | entry->buf_count = count; | |
1046 | entry->seg_count = count; | |
b5e89ed5 | 1047 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 1048 | kfree(temp_pagelist); |
30e2fb18 | 1049 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1050 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1051 | return -ENOMEM; |
1052 | } | |
1da177e4 | 1053 | |
b5e89ed5 DA |
1054 | DRM_DEBUG("buffer %d @ %p\n", |
1055 | entry->buf_count, buf->address); | |
1da177e4 LT |
1056 | } |
1057 | byte_count += PAGE_SIZE << page_order; | |
1058 | } | |
1059 | ||
9a298b2a EA |
1060 | temp_buflist = krealloc(dma->buflist, |
1061 | (dma->buf_count + entry->buf_count) * | |
1062 | sizeof(*dma->buflist), GFP_KERNEL); | |
1da177e4 LT |
1063 | if (!temp_buflist) { |
1064 | /* Free the entry because it isn't valid */ | |
b5e89ed5 | 1065 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 1066 | kfree(temp_pagelist); |
30e2fb18 | 1067 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1068 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1069 | return -ENOMEM; |
1070 | } | |
1071 | dma->buflist = temp_buflist; | |
1072 | ||
b5e89ed5 | 1073 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1074 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1075 | } | |
1076 | ||
88393161 | 1077 | /* No allocations failed, so now we can replace the original pagelist |
1da177e4 LT |
1078 | * with the new one. |
1079 | */ | |
1080 | if (dma->page_count) { | |
9a298b2a | 1081 | kfree(dma->pagelist); |
1da177e4 LT |
1082 | } |
1083 | dma->pagelist = temp_pagelist; | |
1084 | ||
1085 | dma->buf_count += entry->buf_count; | |
1086 | dma->seg_count += entry->seg_count; | |
1087 | dma->page_count += entry->seg_count << page_order; | |
1088 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
1089 | ||
30e2fb18 | 1090 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1091 | |
d59431bf DA |
1092 | request->count = entry->buf_count; |
1093 | request->size = size; | |
1da177e4 | 1094 | |
3417f33e GS |
1095 | if (request->flags & _DRM_PCI_BUFFER_RO) |
1096 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
1097 | ||
b5e89ed5 | 1098 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1099 | return 0; |
1100 | ||
1101 | } | |
9fc5cde7 | 1102 | EXPORT_SYMBOL(drm_legacy_addbufs_pci); |
1da177e4 | 1103 | |
9fc5cde7 DH |
1104 | static int drm_legacy_addbufs_sg(struct drm_device *dev, |
1105 | struct drm_buf_desc *request) | |
1da177e4 | 1106 | { |
cdd55a29 DA |
1107 | struct drm_device_dma *dma = dev->dma; |
1108 | struct drm_buf_entry *entry; | |
056219e2 | 1109 | struct drm_buf *buf; |
1da177e4 LT |
1110 | unsigned long offset; |
1111 | unsigned long agp_offset; | |
1112 | int count; | |
1113 | int order; | |
1114 | int size; | |
1115 | int alignment; | |
1116 | int page_order; | |
1117 | int total; | |
1118 | int byte_count; | |
1119 | int i; | |
056219e2 | 1120 | struct drm_buf **temp_buflist; |
1da177e4 | 1121 | |
b5e89ed5 | 1122 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
69fdf420 | 1123 | return -EOPNOTSUPP; |
b5e89ed5 DA |
1124 | |
1125 | if (!dma) | |
1126 | return -EINVAL; | |
1da177e4 | 1127 | |
d985c108 DA |
1128 | if (!capable(CAP_SYS_ADMIN)) |
1129 | return -EPERM; | |
1130 | ||
d59431bf | 1131 | count = request->count; |
04420c9c | 1132 | order = order_base_2(request->size); |
1da177e4 LT |
1133 | size = 1 << order; |
1134 | ||
b5e89ed5 DA |
1135 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
1136 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
1137 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
1138 | total = PAGE_SIZE << page_order; | |
1139 | ||
1140 | byte_count = 0; | |
d59431bf | 1141 | agp_offset = request->agp_start; |
1da177e4 | 1142 | |
b5e89ed5 DA |
1143 | DRM_DEBUG("count: %d\n", count); |
1144 | DRM_DEBUG("order: %d\n", order); | |
1145 | DRM_DEBUG("size: %d\n", size); | |
1146 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1147 | DRM_DEBUG("alignment: %d\n", alignment); | |
1148 | DRM_DEBUG("page_order: %d\n", page_order); | |
1149 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1150 | |
b5e89ed5 DA |
1151 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1152 | return -EINVAL; | |
1da177e4 | 1153 | |
2177a218 | 1154 | spin_lock(&dev->buf_lock); |
b5e89ed5 | 1155 | if (dev->buf_use) { |
2177a218 | 1156 | spin_unlock(&dev->buf_lock); |
1da177e4 LT |
1157 | return -EBUSY; |
1158 | } | |
b5e89ed5 | 1159 | atomic_inc(&dev->buf_alloc); |
2177a218 | 1160 | spin_unlock(&dev->buf_lock); |
1da177e4 | 1161 | |
30e2fb18 | 1162 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1163 | entry = &dma->bufs[order]; |
b5e89ed5 | 1164 | if (entry->buf_count) { |
30e2fb18 | 1165 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1166 | atomic_dec(&dev->buf_alloc); |
1167 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1168 | } |
1169 | ||
1170 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1171 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1172 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1173 | return -EINVAL; |
1174 | } | |
1175 | ||
b5a2ecd8 | 1176 | entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 1177 | if (!entry->buflist) { |
30e2fb18 | 1178 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1179 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1180 | return -ENOMEM; |
1181 | } | |
1da177e4 LT |
1182 | |
1183 | entry->buf_size = size; | |
1184 | entry->page_order = page_order; | |
1185 | ||
1186 | offset = 0; | |
1187 | ||
b5e89ed5 DA |
1188 | while (entry->buf_count < count) { |
1189 | buf = &entry->buflist[entry->buf_count]; | |
1190 | buf->idx = dma->buf_count + entry->buf_count; | |
1191 | buf->total = alignment; | |
1192 | buf->order = order; | |
1193 | buf->used = 0; | |
1da177e4 | 1194 | |
b5e89ed5 | 1195 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1196 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1197 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1198 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1199 | buf->next = NULL; |
1da177e4 LT |
1200 | buf->waiting = 0; |
1201 | buf->pending = 0; | |
6c340eac | 1202 | buf->file_priv = NULL; |
1da177e4 LT |
1203 | |
1204 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1205 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 1206 | if (!buf->dev_private) { |
1da177e4 LT |
1207 | /* Set count correctly so we free the proper amount. */ |
1208 | entry->buf_count = count; | |
b5e89ed5 | 1209 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1210 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1211 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1212 | return -ENOMEM; |
1213 | } | |
1214 | ||
b5e89ed5 | 1215 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1216 | |
1217 | offset += alignment; | |
1218 | entry->buf_count++; | |
1219 | byte_count += PAGE_SIZE << page_order; | |
1220 | } | |
1221 | ||
b5e89ed5 | 1222 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1223 | |
9a298b2a EA |
1224 | temp_buflist = krealloc(dma->buflist, |
1225 | (dma->buf_count + entry->buf_count) * | |
1226 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 1227 | if (!temp_buflist) { |
1da177e4 | 1228 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1229 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1230 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1231 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1232 | return -ENOMEM; |
1233 | } | |
1234 | dma->buflist = temp_buflist; | |
1235 | ||
b5e89ed5 | 1236 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1237 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1238 | } | |
1239 | ||
1240 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1241 | dma->seg_count += entry->seg_count; |
1242 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1243 | dma->byte_count += byte_count; |
1244 | ||
b5e89ed5 DA |
1245 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1246 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1247 | |
30e2fb18 | 1248 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1249 | |
d59431bf DA |
1250 | request->count = entry->buf_count; |
1251 | request->size = size; | |
1da177e4 LT |
1252 | |
1253 | dma->flags = _DRM_DMA_USE_SG; | |
1254 | ||
b5e89ed5 | 1255 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1256 | return 0; |
1257 | } | |
1258 | ||
abee5491 | 1259 | /* |
1da177e4 LT |
1260 | * Add buffers for DMA transfers (ioctl). |
1261 | * | |
1262 | * \param inode device inode. | |
6c340eac | 1263 | * \param file_priv DRM file private. |
1da177e4 | 1264 | * \param cmd command. |
c60ce623 | 1265 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1266 | * \return zero on success or a negative number on failure. |
1267 | * | |
1268 | * According with the memory type specified in drm_buf_desc::flags and the | |
1269 | * build options, it dispatches the call either to addbufs_agp(), | |
1270 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1271 | * PCI memory respectively. | |
1272 | */ | |
9fc5cde7 DH |
1273 | int drm_legacy_addbufs(struct drm_device *dev, void *data, |
1274 | struct drm_file *file_priv) | |
1da177e4 | 1275 | { |
c153f45f | 1276 | struct drm_buf_desc *request = data; |
d59431bf | 1277 | int ret; |
b5e89ed5 | 1278 | |
fa538645 | 1279 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 1280 | return -EOPNOTSUPP; |
8d38c4b4 | 1281 | |
1da177e4 | 1282 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
69fdf420 | 1283 | return -EOPNOTSUPP; |
1da177e4 | 1284 | |
a7fb8a23 | 1285 | #if IS_ENABLED(CONFIG_AGP) |
c153f45f | 1286 | if (request->flags & _DRM_AGP_BUFFER) |
9fc5cde7 | 1287 | ret = drm_legacy_addbufs_agp(dev, request); |
1da177e4 LT |
1288 | else |
1289 | #endif | |
c153f45f | 1290 | if (request->flags & _DRM_SG_BUFFER) |
9fc5cde7 | 1291 | ret = drm_legacy_addbufs_sg(dev, request); |
c153f45f | 1292 | else if (request->flags & _DRM_FB_BUFFER) |
687fbb2e | 1293 | ret = -EINVAL; |
1da177e4 | 1294 | else |
9fc5cde7 | 1295 | ret = drm_legacy_addbufs_pci(dev, request); |
d59431bf | 1296 | |
d59431bf | 1297 | return ret; |
1da177e4 LT |
1298 | } |
1299 | ||
abee5491 | 1300 | /* |
1da177e4 LT |
1301 | * Get information about the buffer mappings. |
1302 | * | |
1303 | * This was originally mean for debugging purposes, or by a sophisticated | |
1304 | * client library to determine how best to use the available buffers (e.g., | |
1305 | * large buffers can be used for image transfer). | |
1306 | * | |
1307 | * \param inode device inode. | |
6c340eac | 1308 | * \param file_priv DRM file private. |
1da177e4 LT |
1309 | * \param cmd command. |
1310 | * \param arg pointer to a drm_buf_info structure. | |
1311 | * \return zero on success or a negative number on failure. | |
1312 | * | |
2177a218 | 1313 | * Increments drm_device::buf_use while holding the drm_device::buf_lock |
1da177e4 LT |
1314 | * lock, preventing of allocating more buffers after this call. Information |
1315 | * about each requested buffer is then copied into user space. | |
1316 | */ | |
5c7640ab AV |
1317 | int __drm_legacy_infobufs(struct drm_device *dev, |
1318 | void *data, int *p, | |
1319 | int (*f)(void *, int, struct drm_buf_entry *)) | |
1da177e4 | 1320 | { |
cdd55a29 | 1321 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1322 | int i; |
1323 | int count; | |
1324 | ||
fa538645 | 1325 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 1326 | return -EOPNOTSUPP; |
8d38c4b4 | 1327 | |
1da177e4 | 1328 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
69fdf420 | 1329 | return -EOPNOTSUPP; |
1da177e4 | 1330 | |
b5e89ed5 DA |
1331 | if (!dma) |
1332 | return -EINVAL; | |
1da177e4 | 1333 | |
2177a218 | 1334 | spin_lock(&dev->buf_lock); |
b5e89ed5 | 1335 | if (atomic_read(&dev->buf_alloc)) { |
2177a218 | 1336 | spin_unlock(&dev->buf_lock); |
1da177e4 LT |
1337 | return -EBUSY; |
1338 | } | |
1339 | ++dev->buf_use; /* Can't allocate more after this call */ | |
2177a218 | 1340 | spin_unlock(&dev->buf_lock); |
1da177e4 | 1341 | |
b5e89ed5 DA |
1342 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1343 | if (dma->bufs[i].buf_count) | |
1344 | ++count; | |
1da177e4 LT |
1345 | } |
1346 | ||
b5e89ed5 | 1347 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1348 | |
5c7640ab | 1349 | if (*p >= count) { |
b5e89ed5 | 1350 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
5c7640ab | 1351 | struct drm_buf_entry *from = &dma->bufs[i]; |
948de842 | 1352 | |
5c7640ab AV |
1353 | if (from->buf_count) { |
1354 | if (f(data, count, from) < 0) | |
1da177e4 | 1355 | return -EFAULT; |
b5e89ed5 DA |
1356 | DRM_DEBUG("%d %d %d %d %d\n", |
1357 | i, | |
1358 | dma->bufs[i].buf_count, | |
1359 | dma->bufs[i].buf_size, | |
b008c0fc DH |
1360 | dma->bufs[i].low_mark, |
1361 | dma->bufs[i].high_mark); | |
1da177e4 LT |
1362 | ++count; |
1363 | } | |
1364 | } | |
1365 | } | |
5c7640ab | 1366 | *p = count; |
1da177e4 LT |
1367 | |
1368 | return 0; | |
1369 | } | |
1370 | ||
5c7640ab AV |
1371 | static int copy_one_buf(void *data, int count, struct drm_buf_entry *from) |
1372 | { | |
1373 | struct drm_buf_info *request = data; | |
1374 | struct drm_buf_desc __user *to = &request->list[count]; | |
1375 | struct drm_buf_desc v = {.count = from->buf_count, | |
1376 | .size = from->buf_size, | |
1377 | .low_mark = from->low_mark, | |
1378 | .high_mark = from->high_mark}; | |
74b67efa DC |
1379 | |
1380 | if (copy_to_user(to, &v, offsetof(struct drm_buf_desc, flags))) | |
1381 | return -EFAULT; | |
1382 | return 0; | |
5c7640ab AV |
1383 | } |
1384 | ||
1385 | int drm_legacy_infobufs(struct drm_device *dev, void *data, | |
1386 | struct drm_file *file_priv) | |
1387 | { | |
1388 | struct drm_buf_info *request = data; | |
948de842 | 1389 | |
5c7640ab AV |
1390 | return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf); |
1391 | } | |
1392 | ||
abee5491 | 1393 | /* |
1da177e4 LT |
1394 | * Specifies a low and high water mark for buffer allocation |
1395 | * | |
1396 | * \param inode device inode. | |
6c340eac | 1397 | * \param file_priv DRM file private. |
1da177e4 LT |
1398 | * \param cmd command. |
1399 | * \param arg a pointer to a drm_buf_desc structure. | |
1400 | * \return zero on success or a negative number on failure. | |
1401 | * | |
1402 | * Verifies that the size order is bounded between the admissible orders and | |
1403 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1404 | * | |
1405 | * \note This ioctl is deprecated and mostly never used. | |
1406 | */ | |
9fc5cde7 DH |
1407 | int drm_legacy_markbufs(struct drm_device *dev, void *data, |
1408 | struct drm_file *file_priv) | |
1da177e4 | 1409 | { |
cdd55a29 | 1410 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1411 | struct drm_buf_desc *request = data; |
1da177e4 | 1412 | int order; |
cdd55a29 | 1413 | struct drm_buf_entry *entry; |
1da177e4 | 1414 | |
fa538645 | 1415 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 1416 | return -EOPNOTSUPP; |
8d38c4b4 | 1417 | |
1da177e4 | 1418 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
69fdf420 | 1419 | return -EOPNOTSUPP; |
1da177e4 | 1420 | |
b5e89ed5 DA |
1421 | if (!dma) |
1422 | return -EINVAL; | |
1da177e4 | 1423 | |
b5e89ed5 | 1424 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f | 1425 | request->size, request->low_mark, request->high_mark); |
04420c9c | 1426 | order = order_base_2(request->size); |
b5e89ed5 DA |
1427 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1428 | return -EINVAL; | |
1da177e4 LT |
1429 | entry = &dma->bufs[order]; |
1430 | ||
c153f45f | 1431 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1432 | return -EINVAL; |
c153f45f | 1433 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1434 | return -EINVAL; |
1435 | ||
b008c0fc DH |
1436 | entry->low_mark = request->low_mark; |
1437 | entry->high_mark = request->high_mark; | |
1da177e4 LT |
1438 | |
1439 | return 0; | |
1440 | } | |
1441 | ||
abee5491 | 1442 | /* |
b5e89ed5 | 1443 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1444 | * |
1445 | * \param inode device inode. | |
6c340eac | 1446 | * \param file_priv DRM file private. |
1da177e4 LT |
1447 | * \param cmd command. |
1448 | * \param arg pointer to a drm_buf_free structure. | |
1449 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1450 | * |
1da177e4 LT |
1451 | * Calls free_buffer() for each used buffer. |
1452 | * This function is primarily used for debugging. | |
1453 | */ | |
9fc5cde7 DH |
1454 | int drm_legacy_freebufs(struct drm_device *dev, void *data, |
1455 | struct drm_file *file_priv) | |
1da177e4 | 1456 | { |
cdd55a29 | 1457 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1458 | struct drm_buf_free *request = data; |
1da177e4 LT |
1459 | int i; |
1460 | int idx; | |
056219e2 | 1461 | struct drm_buf *buf; |
1da177e4 | 1462 | |
fa538645 | 1463 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 1464 | return -EOPNOTSUPP; |
8d38c4b4 | 1465 | |
1da177e4 | 1466 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
69fdf420 | 1467 | return -EOPNOTSUPP; |
1da177e4 | 1468 | |
b5e89ed5 DA |
1469 | if (!dma) |
1470 | return -EINVAL; | |
1da177e4 | 1471 | |
c153f45f EA |
1472 | DRM_DEBUG("%d\n", request->count); |
1473 | for (i = 0; i < request->count; i++) { | |
1474 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1475 | return -EFAULT; |
b5e89ed5 DA |
1476 | if (idx < 0 || idx >= dma->buf_count) { |
1477 | DRM_ERROR("Index %d (of %d max)\n", | |
1478 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1479 | return -EINVAL; |
1480 | } | |
a3780509 | 1481 | idx = array_index_nospec(idx, dma->buf_count); |
1da177e4 | 1482 | buf = dma->buflist[idx]; |
6c340eac | 1483 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1484 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1485 | task_pid_nr(current)); |
1da177e4 LT |
1486 | return -EINVAL; |
1487 | } | |
a266162a | 1488 | drm_legacy_free_buffer(dev, buf); |
1da177e4 LT |
1489 | } |
1490 | ||
1491 | return 0; | |
1492 | } | |
1493 | ||
abee5491 | 1494 | /* |
1da177e4 LT |
1495 | * Maps all of the DMA buffers into client-virtual space (ioctl). |
1496 | * | |
1497 | * \param inode device inode. | |
6c340eac | 1498 | * \param file_priv DRM file private. |
1da177e4 LT |
1499 | * \param cmd command. |
1500 | * \param arg pointer to a drm_buf_map structure. | |
1501 | * \return zero on success or a negative number on failure. | |
1502 | * | |
6be5ceb0 LT |
1503 | * Maps the AGP, SG or PCI buffer region with vm_mmap(), and copies information |
1504 | * about each buffer into user space. For PCI buffers, it calls vm_mmap() with | |
0ae865ef | 1505 | * offset equal to 0, which drm_mmap() interprets as PCI buffers and calls |
3417f33e | 1506 | * drm_mmap_dma(). |
1da177e4 | 1507 | */ |
87d3ce11 AV |
1508 | int __drm_legacy_mapbufs(struct drm_device *dev, void *data, int *p, |
1509 | void __user **v, | |
1510 | int (*f)(void *, int, unsigned long, | |
2bcfcbfc PM |
1511 | struct drm_buf *), |
1512 | struct drm_file *file_priv) | |
1da177e4 | 1513 | { |
cdd55a29 | 1514 | struct drm_device_dma *dma = dev->dma; |
1da177e4 | 1515 | int retcode = 0; |
1da177e4 | 1516 | unsigned long virtual; |
1da177e4 LT |
1517 | int i; |
1518 | ||
fa538645 | 1519 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 1520 | return -EOPNOTSUPP; |
8d38c4b4 | 1521 | |
1da177e4 | 1522 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
69fdf420 | 1523 | return -EOPNOTSUPP; |
1da177e4 | 1524 | |
b5e89ed5 DA |
1525 | if (!dma) |
1526 | return -EINVAL; | |
1da177e4 | 1527 | |
2177a218 | 1528 | spin_lock(&dev->buf_lock); |
b5e89ed5 | 1529 | if (atomic_read(&dev->buf_alloc)) { |
2177a218 | 1530 | spin_unlock(&dev->buf_lock); |
1da177e4 LT |
1531 | return -EBUSY; |
1532 | } | |
1533 | dev->buf_use++; /* Can't allocate more after this call */ | |
2177a218 | 1534 | spin_unlock(&dev->buf_lock); |
1da177e4 | 1535 | |
87d3ce11 | 1536 | if (*p >= dma->buf_count) { |
d9906753 | 1537 | if ((dev->agp && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1538 | || (drm_core_check_feature(dev, DRIVER_SG) |
687fbb2e | 1539 | && (dma->flags & _DRM_DMA_USE_SG))) { |
f77d390c | 1540 | struct drm_local_map *map = dev->agp_buffer_map; |
d1f2b55a | 1541 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1542 | |
b5e89ed5 | 1543 | if (!map) { |
1da177e4 LT |
1544 | retcode = -EINVAL; |
1545 | goto done; | |
1546 | } | |
6be5ceb0 | 1547 | virtual = vm_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1548 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1549 | MAP_SHARED, |
1550 | token); | |
1da177e4 | 1551 | } else { |
6be5ceb0 | 1552 | virtual = vm_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1553 | PROT_READ | PROT_WRITE, |
1554 | MAP_SHARED, 0); | |
1da177e4 | 1555 | } |
b5e89ed5 | 1556 | if (virtual > -1024UL) { |
1da177e4 LT |
1557 | /* Real error */ |
1558 | retcode = (signed long)virtual; | |
1559 | goto done; | |
1560 | } | |
87d3ce11 | 1561 | *v = (void __user *)virtual; |
1da177e4 | 1562 | |
b5e89ed5 | 1563 | for (i = 0; i < dma->buf_count; i++) { |
87d3ce11 | 1564 | if (f(data, i, virtual, dma->buflist[i]) < 0) { |
1da177e4 LT |
1565 | retcode = -EFAULT; |
1566 | goto done; | |
1567 | } | |
1568 | } | |
1569 | } | |
b5e89ed5 | 1570 | done: |
87d3ce11 AV |
1571 | *p = dma->buf_count; |
1572 | DRM_DEBUG("%d buffers, retcode = %d\n", *p, retcode); | |
1da177e4 LT |
1573 | |
1574 | return retcode; | |
1575 | } | |
1576 | ||
87d3ce11 AV |
1577 | static int map_one_buf(void *data, int idx, unsigned long virtual, |
1578 | struct drm_buf *buf) | |
1579 | { | |
1580 | struct drm_buf_map *request = data; | |
1581 | unsigned long address = virtual + buf->offset; /* *** */ | |
1582 | ||
1583 | if (copy_to_user(&request->list[idx].idx, &buf->idx, | |
1584 | sizeof(request->list[0].idx))) | |
1585 | return -EFAULT; | |
1586 | if (copy_to_user(&request->list[idx].total, &buf->total, | |
1587 | sizeof(request->list[0].total))) | |
1588 | return -EFAULT; | |
1589 | if (clear_user(&request->list[idx].used, sizeof(int))) | |
1590 | return -EFAULT; | |
1591 | if (copy_to_user(&request->list[idx].address, &address, | |
1592 | sizeof(address))) | |
1593 | return -EFAULT; | |
1594 | return 0; | |
1595 | } | |
1596 | ||
1597 | int drm_legacy_mapbufs(struct drm_device *dev, void *data, | |
1598 | struct drm_file *file_priv) | |
1599 | { | |
1600 | struct drm_buf_map *request = data; | |
948de842 | 1601 | |
87d3ce11 AV |
1602 | return __drm_legacy_mapbufs(dev, data, &request->count, |
1603 | &request->virtual, map_one_buf, | |
1604 | file_priv); | |
1605 | } | |
1606 | ||
9fc5cde7 | 1607 | int drm_legacy_dma_ioctl(struct drm_device *dev, void *data, |
6eb9278a DV |
1608 | struct drm_file *file_priv) |
1609 | { | |
fa538645 | 1610 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 1611 | return -EOPNOTSUPP; |
6eb9278a DV |
1612 | |
1613 | if (dev->driver->dma_ioctl) | |
1614 | return dev->driver->dma_ioctl(dev, data, file_priv); | |
1615 | else | |
1616 | return -EINVAL; | |
1617 | } | |
1618 | ||
9fc5cde7 | 1619 | struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev) |
bd0c0cee DV |
1620 | { |
1621 | struct drm_map_list *entry; | |
1622 | ||
1623 | list_for_each_entry(entry, &dev->maplist, head) { | |
1624 | if (entry->map && entry->map->type == _DRM_SHM && | |
1625 | (entry->map->flags & _DRM_CONTAINS_LOCK)) { | |
1626 | return entry->map; | |
1627 | } | |
1628 | } | |
1629 | return NULL; | |
1630 | } | |
9fc5cde7 | 1631 | EXPORT_SYMBOL(drm_legacy_getsarea); |