Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_bufs.c |
1da177e4 | 3 | * Generic buffer template |
b5e89ed5 | 4 | * |
1da177e4 LT |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com | |
11 | * | |
12 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. | |
13 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
14 | * All Rights Reserved. | |
15 | * | |
16 | * Permission is hereby granted, free of charge, to any person obtaining a | |
17 | * copy of this software and associated documentation files (the "Software"), | |
18 | * to deal in the Software without restriction, including without limitation | |
19 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
20 | * and/or sell copies of the Software, and to permit persons to whom the | |
21 | * Software is furnished to do so, subject to the following conditions: | |
22 | * | |
23 | * The above copyright notice and this permission notice (including the next | |
24 | * paragraph) shall be included in all copies or substantial portions of the | |
25 | * Software. | |
26 | * | |
27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
28 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
29 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
30 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
31 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
32 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
33 | * OTHER DEALINGS IN THE SOFTWARE. | |
34 | */ | |
35 | ||
36 | #include <linux/vmalloc.h> | |
37 | #include "drmP.h" | |
38 | ||
d985c108 | 39 | unsigned long drm_get_resource_start(drm_device_t *dev, unsigned int resource) |
1da177e4 | 40 | { |
836cf046 DA |
41 | return pci_resource_start(dev->pdev, resource); |
42 | } | |
43 | EXPORT_SYMBOL(drm_get_resource_start); | |
1da177e4 | 44 | |
d985c108 | 45 | unsigned long drm_get_resource_len(drm_device_t *dev, unsigned int resource) |
836cf046 DA |
46 | { |
47 | return pci_resource_len(dev->pdev, resource); | |
48 | } | |
b5e89ed5 | 49 | |
836cf046 | 50 | EXPORT_SYMBOL(drm_get_resource_len); |
1da177e4 | 51 | |
d985c108 DA |
52 | static drm_map_list_t *drm_find_matching_map(drm_device_t *dev, |
53 | drm_local_map_t *map) | |
836cf046 DA |
54 | { |
55 | struct list_head *list; | |
1da177e4 | 56 | |
836cf046 DA |
57 | list_for_each(list, &dev->maplist->head) { |
58 | drm_map_list_t *entry = list_entry(list, drm_map_list_t, head); | |
59 | if (entry->map && map->type == entry->map->type && | |
60 | entry->map->offset == map->offset) { | |
89625eb1 | 61 | return entry; |
836cf046 DA |
62 | } |
63 | } | |
64 | ||
65 | return NULL; | |
1da177e4 | 66 | } |
1da177e4 | 67 | |
fb41e54b AB |
68 | static int drm_map_handle(drm_device_t *dev, drm_hash_item_t *hash, |
69 | unsigned long user_token, int hashed_handle) | |
d1f2b55a | 70 | { |
8d153f71 | 71 | int use_hashed_handle; |
c2604ce0 | 72 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
73 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
74 | #elif (BITS_PER_LONG == 32) | |
75 | use_hashed_handle = hashed_handle; | |
76 | #else | |
77 | #error Unsupported long size. Neither 64 nor 32 bits. | |
78 | #endif | |
d1f2b55a | 79 | |
e08870c8 TH |
80 | if (!use_hashed_handle) { |
81 | int ret; | |
8d153f71 | 82 | hash->key = user_token; |
e08870c8 TH |
83 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
84 | if (ret != -EINVAL) | |
85 | return ret; | |
d1f2b55a | 86 | } |
e08870c8 TH |
87 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
88 | user_token, 32 - PAGE_SHIFT - 3, | |
89 | PAGE_SHIFT, DRM_MAP_HASH_OFFSET); | |
d1f2b55a | 90 | } |
9a186645 | 91 | |
1da177e4 LT |
92 | /** |
93 | * Ioctl to specify a range of memory that is available for mapping by a non-root process. | |
94 | * | |
95 | * \param inode device inode. | |
96 | * \param filp file pointer. | |
97 | * \param cmd command. | |
98 | * \param arg pointer to a drm_map structure. | |
99 | * \return zero on success or a negative value on error. | |
100 | * | |
101 | * Adjusts the memory offset to its absolute value according to the mapping | |
102 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
103 | * applicable and if supported by the kernel. | |
104 | */ | |
b3a83639 DA |
105 | static int drm_addmap_core(drm_device_t * dev, unsigned int offset, |
106 | unsigned int size, drm_map_type_t type, | |
107 | drm_map_flags_t flags, drm_map_list_t ** maplist) | |
1da177e4 | 108 | { |
1da177e4 | 109 | drm_map_t *map; |
1da177e4 | 110 | drm_map_list_t *list; |
9c8da5eb | 111 | drm_dma_handle_t *dmah; |
8d153f71 TH |
112 | unsigned long user_token; |
113 | int ret; | |
1da177e4 | 114 | |
b5e89ed5 DA |
115 | map = drm_alloc(sizeof(*map), DRM_MEM_MAPS); |
116 | if (!map) | |
1da177e4 LT |
117 | return -ENOMEM; |
118 | ||
7ab98401 DA |
119 | map->offset = offset; |
120 | map->size = size; | |
121 | map->flags = flags; | |
122 | map->type = type; | |
1da177e4 LT |
123 | |
124 | /* Only allow shared memory to be removable since we only keep enough | |
125 | * book keeping information about shared memory to allow for removal | |
126 | * when processes fork. | |
127 | */ | |
b5e89ed5 DA |
128 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
129 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
130 | return -EINVAL; |
131 | } | |
b5e89ed5 DA |
132 | DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n", |
133 | map->offset, map->size, map->type); | |
134 | if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) { | |
135 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
136 | return -EINVAL; |
137 | } | |
b5e89ed5 | 138 | map->mtrr = -1; |
1da177e4 LT |
139 | map->handle = NULL; |
140 | ||
b5e89ed5 | 141 | switch (map->type) { |
1da177e4 LT |
142 | case _DRM_REGISTERS: |
143 | case _DRM_FRAME_BUFFER: | |
88f399cd | 144 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) |
8d2ea625 | 145 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 DA |
146 | map->offset < virt_to_phys(high_memory)) { |
147 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
148 | return -EINVAL; |
149 | } | |
150 | #endif | |
151 | #ifdef __alpha__ | |
152 | map->offset += dev->hose->mem_space->start; | |
153 | #endif | |
836cf046 DA |
154 | /* Some drivers preinitialize some maps, without the X Server |
155 | * needing to be aware of it. Therefore, we just return success | |
156 | * when the server tries to create a duplicate map. | |
157 | */ | |
89625eb1 DA |
158 | list = drm_find_matching_map(dev, map); |
159 | if (list != NULL) { | |
160 | if (list->map->size != map->size) { | |
836cf046 | 161 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
162 | "mismatched sizes, (%ld vs %ld)\n", |
163 | map->type, map->size, | |
164 | list->map->size); | |
89625eb1 | 165 | list->map->size = map->size; |
836cf046 DA |
166 | } |
167 | ||
168 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
89625eb1 | 169 | *maplist = list; |
836cf046 DA |
170 | return 0; |
171 | } | |
172 | ||
1da177e4 | 173 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
174 | if (map->type == _DRM_FRAME_BUFFER || |
175 | (map->flags & _DRM_WRITE_COMBINING)) { | |
176 | map->mtrr = mtrr_add(map->offset, map->size, | |
177 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
178 | } |
179 | } | |
180 | if (map->type == _DRM_REGISTERS) | |
b5e89ed5 | 181 | map->handle = drm_ioremap(map->offset, map->size, dev); |
1da177e4 LT |
182 | break; |
183 | ||
184 | case _DRM_SHM: | |
185 | map->handle = vmalloc_32(map->size); | |
b5e89ed5 DA |
186 | DRM_DEBUG("%lu %d %p\n", |
187 | map->size, drm_order(map->size), map->handle); | |
188 | if (!map->handle) { | |
189 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
190 | return -ENOMEM; |
191 | } | |
192 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 193 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 LT |
194 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
195 | if (dev->lock.hw_lock != NULL) { | |
b5e89ed5 DA |
196 | vfree(map->handle); |
197 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
198 | return -EBUSY; |
199 | } | |
b5e89ed5 | 200 | dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
201 | } |
202 | break; | |
203 | case _DRM_AGP: | |
204 | if (drm_core_has_AGP(dev)) { | |
205 | #ifdef __alpha__ | |
206 | map->offset += dev->hose->mem_space->start; | |
207 | #endif | |
208 | map->offset += dev->agp->base; | |
b5e89ed5 | 209 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
1da177e4 LT |
210 | } |
211 | break; | |
212 | case _DRM_SCATTER_GATHER: | |
213 | if (!dev->sg) { | |
214 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
215 | return -EINVAL; | |
216 | } | |
d1f2b55a | 217 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 218 | break; |
b5e89ed5 | 219 | case _DRM_CONSISTENT: |
2d0f9eaf | 220 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 221 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
222 | * casting it down to 32 bits is no problem, but we |
223 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
224 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
225 | if (!dmah) { | |
2d0f9eaf DA |
226 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
227 | return -ENOMEM; | |
228 | } | |
9c8da5eb DA |
229 | map->handle = dmah->vaddr; |
230 | map->offset = (unsigned long)dmah->busaddr; | |
231 | kfree(dmah); | |
2d0f9eaf | 232 | break; |
1da177e4 | 233 | default: |
b5e89ed5 | 234 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
235 | return -EINVAL; |
236 | } | |
237 | ||
238 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); | |
b5e89ed5 | 239 | if (!list) { |
85abb3f9 AL |
240 | if (map->type == _DRM_REGISTERS) |
241 | drm_ioremapfree(map->handle, map->size, dev); | |
1da177e4 LT |
242 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
243 | return -EINVAL; | |
244 | } | |
245 | memset(list, 0, sizeof(*list)); | |
246 | list->map = map; | |
247 | ||
30e2fb18 | 248 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 249 | list_add(&list->head, &dev->maplist->head); |
8d153f71 | 250 | |
d1f2b55a | 251 | /* Assign a 32-bit handle */ |
30e2fb18 | 252 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
253 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
254 | map->offset; | |
a1d0fcf5 | 255 | ret = drm_map_handle(dev, &list->hash, user_token, 0); |
8d153f71 | 256 | if (ret) { |
85abb3f9 AL |
257 | if (map->type == _DRM_REGISTERS) |
258 | drm_ioremapfree(map->handle, map->size, dev); | |
8d153f71 TH |
259 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
260 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); | |
261 | mutex_unlock(&dev->struct_mutex); | |
262 | return ret; | |
263 | } | |
264 | ||
265 | list->user_token = list->hash.key; | |
30e2fb18 | 266 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 267 | |
89625eb1 | 268 | *maplist = list; |
7ab98401 DA |
269 | return 0; |
270 | } | |
89625eb1 | 271 | |
b5e89ed5 | 272 | int drm_addmap(drm_device_t * dev, unsigned int offset, |
89625eb1 | 273 | unsigned int size, drm_map_type_t type, |
b5e89ed5 | 274 | drm_map_flags_t flags, drm_local_map_t ** map_ptr) |
89625eb1 DA |
275 | { |
276 | drm_map_list_t *list; | |
277 | int rc; | |
278 | ||
279 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
280 | if (!rc) | |
281 | *map_ptr = list->map; | |
282 | return rc; | |
283 | } | |
b5e89ed5 | 284 | |
7ab98401 DA |
285 | EXPORT_SYMBOL(drm_addmap); |
286 | ||
287 | int drm_addmap_ioctl(struct inode *inode, struct file *filp, | |
288 | unsigned int cmd, unsigned long arg) | |
289 | { | |
290 | drm_file_t *priv = filp->private_data; | |
291 | drm_device_t *dev = priv->head->dev; | |
292 | drm_map_t map; | |
89625eb1 | 293 | drm_map_list_t *maplist; |
7ab98401 DA |
294 | drm_map_t __user *argp = (void __user *)arg; |
295 | int err; | |
296 | ||
297 | if (!(filp->f_mode & 3)) | |
298 | return -EACCES; /* Require read/write */ | |
299 | ||
b5e89ed5 | 300 | if (copy_from_user(&map, argp, sizeof(map))) { |
1da177e4 | 301 | return -EFAULT; |
7ab98401 DA |
302 | } |
303 | ||
d985c108 DA |
304 | if (!(capable(CAP_SYS_ADMIN) || map.type == _DRM_AGP)) |
305 | return -EPERM; | |
306 | ||
89625eb1 DA |
307 | err = drm_addmap_core(dev, map.offset, map.size, map.type, map.flags, |
308 | &maplist); | |
7ab98401 | 309 | |
b5e89ed5 | 310 | if (err) |
7ab98401 | 311 | return err; |
d1f2b55a | 312 | |
89625eb1 | 313 | if (copy_to_user(argp, maplist->map, sizeof(drm_map_t))) |
d1f2b55a | 314 | return -EFAULT; |
67e1a014 DA |
315 | |
316 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ | |
317 | if (put_user((void *)(unsigned long)maplist->user_token, &argp->handle)) | |
d1f2b55a | 318 | return -EFAULT; |
1da177e4 | 319 | return 0; |
88f399cd | 320 | } |
1da177e4 | 321 | |
1da177e4 LT |
322 | /** |
323 | * Remove a map private from list and deallocate resources if the mapping | |
324 | * isn't in use. | |
325 | * | |
326 | * \param inode device inode. | |
327 | * \param filp file pointer. | |
328 | * \param cmd command. | |
329 | * \param arg pointer to a drm_map_t structure. | |
330 | * \return zero on success or a negative value on error. | |
331 | * | |
332 | * Searches the map on drm_device::maplist, removes it from the list, see if | |
333 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
334 | * being on use. | |
335 | * | |
7ab98401 | 336 | * \sa drm_addmap |
1da177e4 | 337 | */ |
d985c108 | 338 | int drm_rmmap_locked(drm_device_t *dev, drm_local_map_t *map) |
1da177e4 | 339 | { |
1da177e4 LT |
340 | struct list_head *list; |
341 | drm_map_list_t *r_list = NULL; | |
836cf046 | 342 | drm_dma_handle_t dmah; |
1da177e4 | 343 | |
836cf046 | 344 | /* Find the list entry for the map and remove it */ |
1da177e4 LT |
345 | list_for_each(list, &dev->maplist->head) { |
346 | r_list = list_entry(list, drm_map_list_t, head); | |
347 | ||
836cf046 DA |
348 | if (r_list->map == map) { |
349 | list_del(list); | |
8d153f71 | 350 | drm_ht_remove_key(&dev->map_hash, r_list->user_token); |
836cf046 DA |
351 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); |
352 | break; | |
353 | } | |
1da177e4 LT |
354 | } |
355 | ||
836cf046 DA |
356 | /* List has wrapped around to the head pointer, or it's empty and we |
357 | * didn't find anything. | |
1da177e4 | 358 | */ |
836cf046 | 359 | if (list == (&dev->maplist->head)) { |
1da177e4 LT |
360 | return -EINVAL; |
361 | } | |
1da177e4 | 362 | |
836cf046 DA |
363 | switch (map->type) { |
364 | case _DRM_REGISTERS: | |
365 | drm_ioremapfree(map->handle, map->size, dev); | |
366 | /* FALLTHROUGH */ | |
367 | case _DRM_FRAME_BUFFER: | |
368 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
369 | int retcode; | |
b5e89ed5 DA |
370 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
371 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 372 | } |
836cf046 DA |
373 | break; |
374 | case _DRM_SHM: | |
375 | vfree(map->handle); | |
376 | break; | |
377 | case _DRM_AGP: | |
378 | case _DRM_SCATTER_GATHER: | |
379 | break; | |
380 | case _DRM_CONSISTENT: | |
381 | dmah.vaddr = map->handle; | |
382 | dmah.busaddr = map->offset; | |
383 | dmah.size = map->size; | |
384 | __drm_pci_free(dev, &dmah); | |
385 | break; | |
1da177e4 | 386 | } |
836cf046 DA |
387 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
388 | ||
1da177e4 LT |
389 | return 0; |
390 | } | |
836cf046 | 391 | |
d985c108 | 392 | int drm_rmmap(drm_device_t *dev, drm_local_map_t *map) |
836cf046 DA |
393 | { |
394 | int ret; | |
395 | ||
30e2fb18 | 396 | mutex_lock(&dev->struct_mutex); |
836cf046 | 397 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 398 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
399 | |
400 | return ret; | |
401 | } | |
7ab98401 | 402 | |
836cf046 DA |
403 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
404 | * the last close of the device, and this is necessary for cleanup when things | |
405 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
406 | * like a pointless exercise since they're going away anyway. | |
407 | * | |
408 | * One use case might be after addmap is allowed for normal users for SHM and | |
409 | * gets used by drivers that the server doesn't need to care about. This seems | |
410 | * unlikely. | |
411 | */ | |
7ab98401 DA |
412 | int drm_rmmap_ioctl(struct inode *inode, struct file *filp, |
413 | unsigned int cmd, unsigned long arg) | |
414 | { | |
415 | drm_file_t *priv = filp->private_data; | |
416 | drm_device_t *dev = priv->head->dev; | |
417 | drm_map_t request; | |
836cf046 DA |
418 | drm_local_map_t *map = NULL; |
419 | struct list_head *list; | |
420 | int ret; | |
7ab98401 | 421 | |
b5e89ed5 | 422 | if (copy_from_user(&request, (drm_map_t __user *) arg, sizeof(request))) { |
7ab98401 DA |
423 | return -EFAULT; |
424 | } | |
425 | ||
30e2fb18 | 426 | mutex_lock(&dev->struct_mutex); |
836cf046 DA |
427 | list_for_each(list, &dev->maplist->head) { |
428 | drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head); | |
429 | ||
430 | if (r_list->map && | |
b5e89ed5 | 431 | r_list->user_token == (unsigned long)request.handle && |
836cf046 DA |
432 | r_list->map->flags & _DRM_REMOVABLE) { |
433 | map = r_list->map; | |
434 | break; | |
435 | } | |
436 | } | |
437 | ||
438 | /* List has wrapped around to the head pointer, or its empty we didn't | |
439 | * find anything. | |
440 | */ | |
441 | if (list == (&dev->maplist->head)) { | |
30e2fb18 | 442 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
443 | return -EINVAL; |
444 | } | |
445 | ||
7a3f1f21 TH |
446 | if (!map) { |
447 | mutex_unlock(&dev->struct_mutex); | |
836cf046 | 448 | return -EINVAL; |
7a3f1f21 | 449 | } |
836cf046 DA |
450 | |
451 | /* Register and framebuffer maps are permanent */ | |
452 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 453 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
454 | return 0; |
455 | } | |
456 | ||
457 | ret = drm_rmmap_locked(dev, map); | |
458 | ||
30e2fb18 | 459 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
460 | |
461 | return ret; | |
7ab98401 | 462 | } |
1da177e4 LT |
463 | |
464 | /** | |
465 | * Cleanup after an error on one of the addbufs() functions. | |
466 | * | |
836cf046 | 467 | * \param dev DRM device. |
1da177e4 LT |
468 | * \param entry buffer entry where the error occurred. |
469 | * | |
470 | * Frees any pages and buffers associated with the given entry. | |
471 | */ | |
b5e89ed5 | 472 | static void drm_cleanup_buf_error(drm_device_t * dev, drm_buf_entry_t * entry) |
1da177e4 LT |
473 | { |
474 | int i; | |
475 | ||
476 | if (entry->seg_count) { | |
477 | for (i = 0; i < entry->seg_count; i++) { | |
478 | if (entry->seglist[i]) { | |
ddf19b97 | 479 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
480 | } |
481 | } | |
482 | drm_free(entry->seglist, | |
b5e89ed5 DA |
483 | entry->seg_count * |
484 | sizeof(*entry->seglist), DRM_MEM_SEGS); | |
1da177e4 LT |
485 | |
486 | entry->seg_count = 0; | |
487 | } | |
488 | ||
b5e89ed5 DA |
489 | if (entry->buf_count) { |
490 | for (i = 0; i < entry->buf_count; i++) { | |
1da177e4 LT |
491 | if (entry->buflist[i].dev_private) { |
492 | drm_free(entry->buflist[i].dev_private, | |
b5e89ed5 DA |
493 | entry->buflist[i].dev_priv_size, |
494 | DRM_MEM_BUFS); | |
1da177e4 LT |
495 | } |
496 | } | |
497 | drm_free(entry->buflist, | |
b5e89ed5 DA |
498 | entry->buf_count * |
499 | sizeof(*entry->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
500 | |
501 | entry->buf_count = 0; | |
502 | } | |
503 | } | |
504 | ||
505 | #if __OS_HAS_AGP | |
506 | /** | |
d59431bf | 507 | * Add AGP buffers for DMA transfers. |
1da177e4 | 508 | * |
d59431bf DA |
509 | * \param dev drm_device_t to which the buffers are to be added. |
510 | * \param request pointer to a drm_buf_desc_t describing the request. | |
1da177e4 | 511 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 512 | * |
1da177e4 LT |
513 | * After some sanity checks creates a drm_buf structure for each buffer and |
514 | * reallocates the buffer list of the same size order to accommodate the new | |
515 | * buffers. | |
516 | */ | |
b5e89ed5 | 517 | int drm_addbufs_agp(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 518 | { |
1da177e4 | 519 | drm_device_dma_t *dma = dev->dma; |
1da177e4 LT |
520 | drm_buf_entry_t *entry; |
521 | drm_buf_t *buf; | |
522 | unsigned long offset; | |
523 | unsigned long agp_offset; | |
524 | int count; | |
525 | int order; | |
526 | int size; | |
527 | int alignment; | |
528 | int page_order; | |
529 | int total; | |
530 | int byte_count; | |
531 | int i; | |
532 | drm_buf_t **temp_buflist; | |
1da177e4 | 533 | |
b5e89ed5 DA |
534 | if (!dma) |
535 | return -EINVAL; | |
1da177e4 | 536 | |
d59431bf DA |
537 | count = request->count; |
538 | order = drm_order(request->size); | |
1da177e4 LT |
539 | size = 1 << order; |
540 | ||
b5e89ed5 DA |
541 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
542 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
543 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
544 | total = PAGE_SIZE << page_order; | |
545 | ||
546 | byte_count = 0; | |
d59431bf | 547 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 548 | |
b5e89ed5 DA |
549 | DRM_DEBUG("count: %d\n", count); |
550 | DRM_DEBUG("order: %d\n", order); | |
551 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 552 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
553 | DRM_DEBUG("alignment: %d\n", alignment); |
554 | DRM_DEBUG("page_order: %d\n", page_order); | |
555 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 556 | |
b5e89ed5 DA |
557 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
558 | return -EINVAL; | |
559 | if (dev->queue_count) | |
560 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 561 | |
b5e89ed5 DA |
562 | spin_lock(&dev->count_lock); |
563 | if (dev->buf_use) { | |
564 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
565 | return -EBUSY; |
566 | } | |
b5e89ed5 DA |
567 | atomic_inc(&dev->buf_alloc); |
568 | spin_unlock(&dev->count_lock); | |
1da177e4 | 569 | |
30e2fb18 | 570 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 571 | entry = &dma->bufs[order]; |
b5e89ed5 | 572 | if (entry->buf_count) { |
30e2fb18 | 573 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
574 | atomic_dec(&dev->buf_alloc); |
575 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
576 | } |
577 | ||
578 | if (count < 0 || count > 4096) { | |
30e2fb18 | 579 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 580 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
581 | return -EINVAL; |
582 | } | |
583 | ||
b5e89ed5 DA |
584 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
585 | DRM_MEM_BUFS); | |
586 | if (!entry->buflist) { | |
30e2fb18 | 587 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 588 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
589 | return -ENOMEM; |
590 | } | |
b5e89ed5 | 591 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
592 | |
593 | entry->buf_size = size; | |
594 | entry->page_order = page_order; | |
595 | ||
596 | offset = 0; | |
597 | ||
b5e89ed5 DA |
598 | while (entry->buf_count < count) { |
599 | buf = &entry->buflist[entry->buf_count]; | |
600 | buf->idx = dma->buf_count + entry->buf_count; | |
601 | buf->total = alignment; | |
602 | buf->order = order; | |
603 | buf->used = 0; | |
1da177e4 | 604 | |
b5e89ed5 | 605 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
606 | buf->bus_address = agp_offset + offset; |
607 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 608 | buf->next = NULL; |
1da177e4 LT |
609 | buf->waiting = 0; |
610 | buf->pending = 0; | |
b5e89ed5 DA |
611 | init_waitqueue_head(&buf->dma_wait); |
612 | buf->filp = NULL; | |
1da177e4 LT |
613 | |
614 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
615 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
616 | if (!buf->dev_private) { | |
1da177e4 LT |
617 | /* Set count correctly so we free the proper amount. */ |
618 | entry->buf_count = count; | |
b5e89ed5 | 619 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 620 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 621 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
622 | return -ENOMEM; |
623 | } | |
b5e89ed5 | 624 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 625 | |
b5e89ed5 | 626 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
627 | |
628 | offset += alignment; | |
629 | entry->buf_count++; | |
630 | byte_count += PAGE_SIZE << page_order; | |
631 | } | |
632 | ||
b5e89ed5 | 633 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 634 | |
b5e89ed5 DA |
635 | temp_buflist = drm_realloc(dma->buflist, |
636 | dma->buf_count * sizeof(*dma->buflist), | |
637 | (dma->buf_count + entry->buf_count) | |
638 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
639 | if (!temp_buflist) { | |
1da177e4 | 640 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 641 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 642 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 643 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
644 | return -ENOMEM; |
645 | } | |
646 | dma->buflist = temp_buflist; | |
647 | ||
b5e89ed5 | 648 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
649 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
650 | } | |
651 | ||
652 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
653 | dma->seg_count += entry->seg_count; |
654 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
655 | dma->byte_count += byte_count; |
656 | ||
b5e89ed5 DA |
657 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
658 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 659 | |
30e2fb18 | 660 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 661 | |
d59431bf DA |
662 | request->count = entry->buf_count; |
663 | request->size = size; | |
1da177e4 LT |
664 | |
665 | dma->flags = _DRM_DMA_USE_AGP; | |
666 | ||
b5e89ed5 | 667 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
668 | return 0; |
669 | } | |
d84f76d3 | 670 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 671 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 672 | |
b5e89ed5 | 673 | int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 674 | { |
1da177e4 | 675 | drm_device_dma_t *dma = dev->dma; |
1da177e4 LT |
676 | int count; |
677 | int order; | |
678 | int size; | |
679 | int total; | |
680 | int page_order; | |
681 | drm_buf_entry_t *entry; | |
ddf19b97 | 682 | drm_dma_handle_t *dmah; |
1da177e4 LT |
683 | drm_buf_t *buf; |
684 | int alignment; | |
685 | unsigned long offset; | |
686 | int i; | |
687 | int byte_count; | |
688 | int page_count; | |
689 | unsigned long *temp_pagelist; | |
690 | drm_buf_t **temp_buflist; | |
1da177e4 | 691 | |
b5e89ed5 DA |
692 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
693 | return -EINVAL; | |
d985c108 | 694 | |
b5e89ed5 DA |
695 | if (!dma) |
696 | return -EINVAL; | |
1da177e4 | 697 | |
d985c108 DA |
698 | if (!capable(CAP_SYS_ADMIN)) |
699 | return -EPERM; | |
700 | ||
d59431bf DA |
701 | count = request->count; |
702 | order = drm_order(request->size); | |
1da177e4 LT |
703 | size = 1 << order; |
704 | ||
b5e89ed5 DA |
705 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
706 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 707 | |
b5e89ed5 DA |
708 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
709 | return -EINVAL; | |
710 | if (dev->queue_count) | |
711 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 712 | |
d59431bf | 713 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 714 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
715 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
716 | total = PAGE_SIZE << page_order; | |
717 | ||
b5e89ed5 DA |
718 | spin_lock(&dev->count_lock); |
719 | if (dev->buf_use) { | |
720 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
721 | return -EBUSY; |
722 | } | |
b5e89ed5 DA |
723 | atomic_inc(&dev->buf_alloc); |
724 | spin_unlock(&dev->count_lock); | |
1da177e4 | 725 | |
30e2fb18 | 726 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 727 | entry = &dma->bufs[order]; |
b5e89ed5 | 728 | if (entry->buf_count) { |
30e2fb18 | 729 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 730 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
731 | return -ENOMEM; /* May only call once for each order */ |
732 | } | |
733 | ||
734 | if (count < 0 || count > 4096) { | |
30e2fb18 | 735 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 736 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
737 | return -EINVAL; |
738 | } | |
739 | ||
b5e89ed5 DA |
740 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
741 | DRM_MEM_BUFS); | |
742 | if (!entry->buflist) { | |
30e2fb18 | 743 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 744 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
745 | return -ENOMEM; |
746 | } | |
b5e89ed5 DA |
747 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
748 | ||
749 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), | |
750 | DRM_MEM_SEGS); | |
751 | if (!entry->seglist) { | |
752 | drm_free(entry->buflist, | |
753 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
30e2fb18 | 754 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 755 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
756 | return -ENOMEM; |
757 | } | |
b5e89ed5 | 758 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
759 | |
760 | /* Keep the original pagelist until we know all the allocations | |
761 | * have succeeded | |
762 | */ | |
b5e89ed5 DA |
763 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
764 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
1da177e4 | 765 | if (!temp_pagelist) { |
b5e89ed5 DA |
766 | drm_free(entry->buflist, |
767 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
768 | drm_free(entry->seglist, | |
769 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); | |
30e2fb18 | 770 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 771 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
772 | return -ENOMEM; |
773 | } | |
774 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
775 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
776 | DRM_DEBUG("pagelist: %d entries\n", | |
777 | dma->page_count + (count << page_order)); | |
1da177e4 | 778 | |
b5e89ed5 | 779 | entry->buf_size = size; |
1da177e4 LT |
780 | entry->page_order = page_order; |
781 | byte_count = 0; | |
782 | page_count = 0; | |
783 | ||
b5e89ed5 | 784 | while (entry->buf_count < count) { |
ddf19b97 DA |
785 | |
786 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); | |
787 | ||
788 | if (!dmah) { | |
1da177e4 LT |
789 | /* Set count correctly so we free the proper amount. */ |
790 | entry->buf_count = count; | |
791 | entry->seg_count = count; | |
792 | drm_cleanup_buf_error(dev, entry); | |
b5e89ed5 DA |
793 | drm_free(temp_pagelist, |
794 | (dma->page_count + (count << page_order)) | |
795 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 796 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 797 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
798 | return -ENOMEM; |
799 | } | |
ddf19b97 | 800 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
801 | for (i = 0; i < (1 << page_order); i++) { |
802 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
803 | dma->page_count + page_count, | |
ddf19b97 | 804 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 805 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 806 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 807 | } |
b5e89ed5 DA |
808 | for (offset = 0; |
809 | offset + size <= total && entry->buf_count < count; | |
810 | offset += alignment, ++entry->buf_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; | |
816 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
817 | buf->address = (void *)(dmah->vaddr + offset); |
818 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 819 | buf->next = NULL; |
1da177e4 LT |
820 | buf->waiting = 0; |
821 | buf->pending = 0; | |
b5e89ed5 DA |
822 | init_waitqueue_head(&buf->dma_wait); |
823 | buf->filp = NULL; | |
1da177e4 LT |
824 | |
825 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
826 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
827 | DRM_MEM_BUFS); | |
828 | if (!buf->dev_private) { | |
1da177e4 LT |
829 | /* Set count correctly so we free the proper amount. */ |
830 | entry->buf_count = count; | |
831 | entry->seg_count = count; | |
b5e89ed5 DA |
832 | drm_cleanup_buf_error(dev, entry); |
833 | drm_free(temp_pagelist, | |
834 | (dma->page_count + | |
835 | (count << page_order)) | |
836 | * sizeof(*dma->pagelist), | |
837 | DRM_MEM_PAGES); | |
30e2fb18 | 838 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 839 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
840 | return -ENOMEM; |
841 | } | |
b5e89ed5 | 842 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 843 | |
b5e89ed5 DA |
844 | DRM_DEBUG("buffer %d @ %p\n", |
845 | entry->buf_count, buf->address); | |
1da177e4 LT |
846 | } |
847 | byte_count += PAGE_SIZE << page_order; | |
848 | } | |
849 | ||
b5e89ed5 DA |
850 | temp_buflist = drm_realloc(dma->buflist, |
851 | dma->buf_count * sizeof(*dma->buflist), | |
852 | (dma->buf_count + entry->buf_count) | |
853 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
854 | if (!temp_buflist) { |
855 | /* Free the entry because it isn't valid */ | |
b5e89ed5 DA |
856 | drm_cleanup_buf_error(dev, entry); |
857 | drm_free(temp_pagelist, | |
858 | (dma->page_count + (count << page_order)) | |
859 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 860 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 861 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
862 | return -ENOMEM; |
863 | } | |
864 | dma->buflist = temp_buflist; | |
865 | ||
b5e89ed5 | 866 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
867 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
868 | } | |
869 | ||
870 | /* No allocations failed, so now we can replace the orginal pagelist | |
871 | * with the new one. | |
872 | */ | |
873 | if (dma->page_count) { | |
874 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
875 | dma->page_count * sizeof(*dma->pagelist), |
876 | DRM_MEM_PAGES); | |
1da177e4 LT |
877 | } |
878 | dma->pagelist = temp_pagelist; | |
879 | ||
880 | dma->buf_count += entry->buf_count; | |
881 | dma->seg_count += entry->seg_count; | |
882 | dma->page_count += entry->seg_count << page_order; | |
883 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
884 | ||
30e2fb18 | 885 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 886 | |
d59431bf DA |
887 | request->count = entry->buf_count; |
888 | request->size = size; | |
1da177e4 | 889 | |
3417f33e GS |
890 | if (request->flags & _DRM_PCI_BUFFER_RO) |
891 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
892 | ||
b5e89ed5 | 893 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
894 | return 0; |
895 | ||
896 | } | |
d84f76d3 | 897 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 898 | |
b5e89ed5 | 899 | static int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 900 | { |
1da177e4 | 901 | drm_device_dma_t *dma = dev->dma; |
1da177e4 LT |
902 | drm_buf_entry_t *entry; |
903 | drm_buf_t *buf; | |
904 | unsigned long offset; | |
905 | unsigned long agp_offset; | |
906 | int count; | |
907 | int order; | |
908 | int size; | |
909 | int alignment; | |
910 | int page_order; | |
911 | int total; | |
912 | int byte_count; | |
913 | int i; | |
914 | drm_buf_t **temp_buflist; | |
915 | ||
b5e89ed5 DA |
916 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
917 | return -EINVAL; | |
918 | ||
919 | if (!dma) | |
920 | return -EINVAL; | |
1da177e4 | 921 | |
d985c108 DA |
922 | if (!capable(CAP_SYS_ADMIN)) |
923 | return -EPERM; | |
924 | ||
d59431bf DA |
925 | count = request->count; |
926 | order = drm_order(request->size); | |
1da177e4 LT |
927 | size = 1 << order; |
928 | ||
b5e89ed5 DA |
929 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
930 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
931 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
932 | total = PAGE_SIZE << page_order; | |
933 | ||
934 | byte_count = 0; | |
d59431bf | 935 | agp_offset = request->agp_start; |
1da177e4 | 936 | |
b5e89ed5 DA |
937 | DRM_DEBUG("count: %d\n", count); |
938 | DRM_DEBUG("order: %d\n", order); | |
939 | DRM_DEBUG("size: %d\n", size); | |
940 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
941 | DRM_DEBUG("alignment: %d\n", alignment); | |
942 | DRM_DEBUG("page_order: %d\n", page_order); | |
943 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 944 | |
b5e89ed5 DA |
945 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
946 | return -EINVAL; | |
947 | if (dev->queue_count) | |
948 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 949 | |
b5e89ed5 DA |
950 | spin_lock(&dev->count_lock); |
951 | if (dev->buf_use) { | |
952 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
953 | return -EBUSY; |
954 | } | |
b5e89ed5 DA |
955 | atomic_inc(&dev->buf_alloc); |
956 | spin_unlock(&dev->count_lock); | |
1da177e4 | 957 | |
30e2fb18 | 958 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 959 | entry = &dma->bufs[order]; |
b5e89ed5 | 960 | if (entry->buf_count) { |
30e2fb18 | 961 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
962 | atomic_dec(&dev->buf_alloc); |
963 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
964 | } |
965 | ||
966 | if (count < 0 || count > 4096) { | |
30e2fb18 | 967 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 968 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
969 | return -EINVAL; |
970 | } | |
971 | ||
b5e89ed5 DA |
972 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
973 | DRM_MEM_BUFS); | |
974 | if (!entry->buflist) { | |
30e2fb18 | 975 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 976 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
977 | return -ENOMEM; |
978 | } | |
b5e89ed5 | 979 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
980 | |
981 | entry->buf_size = size; | |
982 | entry->page_order = page_order; | |
983 | ||
984 | offset = 0; | |
985 | ||
b5e89ed5 DA |
986 | while (entry->buf_count < count) { |
987 | buf = &entry->buflist[entry->buf_count]; | |
988 | buf->idx = dma->buf_count + entry->buf_count; | |
989 | buf->total = alignment; | |
990 | buf->order = order; | |
991 | buf->used = 0; | |
1da177e4 | 992 | |
b5e89ed5 | 993 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 994 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 995 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 996 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 997 | buf->next = NULL; |
1da177e4 LT |
998 | buf->waiting = 0; |
999 | buf->pending = 0; | |
b5e89ed5 DA |
1000 | init_waitqueue_head(&buf->dma_wait); |
1001 | buf->filp = NULL; | |
1da177e4 LT |
1002 | |
1003 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
1004 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
1005 | if (!buf->dev_private) { | |
1da177e4 LT |
1006 | /* Set count correctly so we free the proper amount. */ |
1007 | entry->buf_count = count; | |
b5e89ed5 | 1008 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1009 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1010 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1011 | return -ENOMEM; |
1012 | } | |
1013 | ||
b5e89ed5 | 1014 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1015 | |
b5e89ed5 | 1016 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1017 | |
1018 | offset += alignment; | |
1019 | entry->buf_count++; | |
1020 | byte_count += PAGE_SIZE << page_order; | |
1021 | } | |
1022 | ||
b5e89ed5 | 1023 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1024 | |
b5e89ed5 DA |
1025 | temp_buflist = drm_realloc(dma->buflist, |
1026 | dma->buf_count * sizeof(*dma->buflist), | |
1027 | (dma->buf_count + entry->buf_count) | |
1028 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1029 | if (!temp_buflist) { | |
1da177e4 | 1030 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1031 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1032 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1033 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1034 | return -ENOMEM; |
1035 | } | |
1036 | dma->buflist = temp_buflist; | |
1037 | ||
b5e89ed5 | 1038 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1039 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1040 | } | |
1041 | ||
1042 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1043 | dma->seg_count += entry->seg_count; |
1044 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1045 | dma->byte_count += byte_count; |
1046 | ||
b5e89ed5 DA |
1047 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1048 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1049 | |
30e2fb18 | 1050 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1051 | |
d59431bf DA |
1052 | request->count = entry->buf_count; |
1053 | request->size = size; | |
1da177e4 LT |
1054 | |
1055 | dma->flags = _DRM_DMA_USE_SG; | |
1056 | ||
b5e89ed5 | 1057 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1058 | return 0; |
1059 | } | |
1060 | ||
5d23fafb | 1061 | static int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request) |
b84397d6 | 1062 | { |
b84397d6 | 1063 | drm_device_dma_t *dma = dev->dma; |
b84397d6 DA |
1064 | drm_buf_entry_t *entry; |
1065 | drm_buf_t *buf; | |
1066 | unsigned long offset; | |
1067 | unsigned long agp_offset; | |
1068 | int count; | |
1069 | int order; | |
1070 | int size; | |
1071 | int alignment; | |
1072 | int page_order; | |
1073 | int total; | |
1074 | int byte_count; | |
1075 | int i; | |
1076 | drm_buf_t **temp_buflist; | |
b84397d6 DA |
1077 | |
1078 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1079 | return -EINVAL; | |
b5e89ed5 | 1080 | |
b84397d6 DA |
1081 | if (!dma) |
1082 | return -EINVAL; | |
1083 | ||
d985c108 DA |
1084 | if (!capable(CAP_SYS_ADMIN)) |
1085 | return -EPERM; | |
1086 | ||
d59431bf DA |
1087 | count = request->count; |
1088 | order = drm_order(request->size); | |
b84397d6 DA |
1089 | size = 1 << order; |
1090 | ||
d59431bf | 1091 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1092 | ? PAGE_ALIGN(size) : size; |
1093 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1094 | total = PAGE_SIZE << page_order; | |
1095 | ||
1096 | byte_count = 0; | |
d59431bf | 1097 | agp_offset = request->agp_start; |
b84397d6 DA |
1098 | |
1099 | DRM_DEBUG("count: %d\n", count); | |
1100 | DRM_DEBUG("order: %d\n", order); | |
1101 | DRM_DEBUG("size: %d\n", size); | |
1102 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1103 | DRM_DEBUG("alignment: %d\n", alignment); | |
1104 | DRM_DEBUG("page_order: %d\n", page_order); | |
1105 | DRM_DEBUG("total: %d\n", total); | |
1106 | ||
1107 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1108 | return -EINVAL; | |
1109 | if (dev->queue_count) | |
1110 | return -EBUSY; /* Not while in use */ | |
1111 | ||
1112 | spin_lock(&dev->count_lock); | |
1113 | if (dev->buf_use) { | |
1114 | spin_unlock(&dev->count_lock); | |
1115 | return -EBUSY; | |
1116 | } | |
1117 | atomic_inc(&dev->buf_alloc); | |
1118 | spin_unlock(&dev->count_lock); | |
1119 | ||
30e2fb18 | 1120 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1121 | entry = &dma->bufs[order]; |
1122 | if (entry->buf_count) { | |
30e2fb18 | 1123 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1124 | atomic_dec(&dev->buf_alloc); |
1125 | return -ENOMEM; /* May only call once for each order */ | |
1126 | } | |
1127 | ||
1128 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1129 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1130 | atomic_dec(&dev->buf_alloc); |
1131 | return -EINVAL; | |
1132 | } | |
1133 | ||
1134 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), | |
1135 | DRM_MEM_BUFS); | |
1136 | if (!entry->buflist) { | |
30e2fb18 | 1137 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1138 | atomic_dec(&dev->buf_alloc); |
1139 | return -ENOMEM; | |
1140 | } | |
1141 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1142 | ||
1143 | entry->buf_size = size; | |
1144 | entry->page_order = page_order; | |
1145 | ||
1146 | offset = 0; | |
1147 | ||
1148 | while (entry->buf_count < count) { | |
1149 | buf = &entry->buflist[entry->buf_count]; | |
1150 | buf->idx = dma->buf_count + entry->buf_count; | |
1151 | buf->total = alignment; | |
1152 | buf->order = order; | |
1153 | buf->used = 0; | |
1154 | ||
1155 | buf->offset = (dma->byte_count + offset); | |
1156 | buf->bus_address = agp_offset + offset; | |
1157 | buf->address = (void *)(agp_offset + offset); | |
1158 | buf->next = NULL; | |
1159 | buf->waiting = 0; | |
1160 | buf->pending = 0; | |
1161 | init_waitqueue_head(&buf->dma_wait); | |
1162 | buf->filp = NULL; | |
1163 | ||
1164 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
1165 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); | |
1166 | if (!buf->dev_private) { | |
1167 | /* Set count correctly so we free the proper amount. */ | |
1168 | entry->buf_count = count; | |
1169 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1170 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1171 | atomic_dec(&dev->buf_alloc); |
1172 | return -ENOMEM; | |
1173 | } | |
1174 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1175 | ||
1176 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1177 | ||
1178 | offset += alignment; | |
1179 | entry->buf_count++; | |
1180 | byte_count += PAGE_SIZE << page_order; | |
1181 | } | |
1182 | ||
1183 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1184 | ||
1185 | temp_buflist = drm_realloc(dma->buflist, | |
1186 | dma->buf_count * sizeof(*dma->buflist), | |
1187 | (dma->buf_count + entry->buf_count) | |
1188 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1189 | if (!temp_buflist) { | |
1190 | /* Free the entry because it isn't valid */ | |
1191 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1192 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1193 | atomic_dec(&dev->buf_alloc); |
1194 | return -ENOMEM; | |
1195 | } | |
1196 | dma->buflist = temp_buflist; | |
1197 | ||
1198 | for (i = 0; i < entry->buf_count; i++) { | |
1199 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1200 | } | |
1201 | ||
1202 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1203 | dma->seg_count += entry->seg_count; |
1204 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1205 | dma->byte_count += byte_count; |
1206 | ||
1207 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1208 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1209 | ||
30e2fb18 | 1210 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1211 | |
d59431bf DA |
1212 | request->count = entry->buf_count; |
1213 | request->size = size; | |
b84397d6 DA |
1214 | |
1215 | dma->flags = _DRM_DMA_USE_FB; | |
1216 | ||
1217 | atomic_dec(&dev->buf_alloc); | |
1218 | return 0; | |
1219 | } | |
d985c108 | 1220 | |
b84397d6 | 1221 | |
1da177e4 LT |
1222 | /** |
1223 | * Add buffers for DMA transfers (ioctl). | |
1224 | * | |
1225 | * \param inode device inode. | |
1226 | * \param filp file pointer. | |
1227 | * \param cmd command. | |
1228 | * \param arg pointer to a drm_buf_desc_t request. | |
1229 | * \return zero on success or a negative number on failure. | |
1230 | * | |
1231 | * According with the memory type specified in drm_buf_desc::flags and the | |
1232 | * build options, it dispatches the call either to addbufs_agp(), | |
1233 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1234 | * PCI memory respectively. | |
1235 | */ | |
b5e89ed5 DA |
1236 | int drm_addbufs(struct inode *inode, struct file *filp, |
1237 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1238 | { |
1239 | drm_buf_desc_t request; | |
1240 | drm_file_t *priv = filp->private_data; | |
1241 | drm_device_t *dev = priv->head->dev; | |
d59431bf | 1242 | int ret; |
b5e89ed5 | 1243 | |
1da177e4 LT |
1244 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1245 | return -EINVAL; | |
1246 | ||
b5e89ed5 DA |
1247 | if (copy_from_user(&request, (drm_buf_desc_t __user *) arg, |
1248 | sizeof(request))) | |
1da177e4 LT |
1249 | return -EFAULT; |
1250 | ||
1251 | #if __OS_HAS_AGP | |
b5e89ed5 DA |
1252 | if (request.flags & _DRM_AGP_BUFFER) |
1253 | ret = drm_addbufs_agp(dev, &request); | |
1da177e4 LT |
1254 | else |
1255 | #endif | |
b5e89ed5 DA |
1256 | if (request.flags & _DRM_SG_BUFFER) |
1257 | ret = drm_addbufs_sg(dev, &request); | |
1258 | else if (request.flags & _DRM_FB_BUFFER) | |
1259 | ret = drm_addbufs_fb(dev, &request); | |
1da177e4 | 1260 | else |
b5e89ed5 | 1261 | ret = drm_addbufs_pci(dev, &request); |
d59431bf | 1262 | |
b5e89ed5 DA |
1263 | if (ret == 0) { |
1264 | if (copy_to_user((void __user *)arg, &request, sizeof(request))) { | |
d59431bf DA |
1265 | ret = -EFAULT; |
1266 | } | |
1267 | } | |
1268 | return ret; | |
1da177e4 LT |
1269 | } |
1270 | ||
1da177e4 LT |
1271 | /** |
1272 | * Get information about the buffer mappings. | |
1273 | * | |
1274 | * This was originally mean for debugging purposes, or by a sophisticated | |
1275 | * client library to determine how best to use the available buffers (e.g., | |
1276 | * large buffers can be used for image transfer). | |
1277 | * | |
1278 | * \param inode device inode. | |
1279 | * \param filp file pointer. | |
1280 | * \param cmd command. | |
1281 | * \param arg pointer to a drm_buf_info structure. | |
1282 | * \return zero on success or a negative number on failure. | |
1283 | * | |
1284 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1285 | * lock, preventing of allocating more buffers after this call. Information | |
1286 | * about each requested buffer is then copied into user space. | |
1287 | */ | |
b5e89ed5 DA |
1288 | int drm_infobufs(struct inode *inode, struct file *filp, |
1289 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1290 | { |
1291 | drm_file_t *priv = filp->private_data; | |
1292 | drm_device_t *dev = priv->head->dev; | |
1293 | drm_device_dma_t *dma = dev->dma; | |
1294 | drm_buf_info_t request; | |
1295 | drm_buf_info_t __user *argp = (void __user *)arg; | |
1296 | int i; | |
1297 | int count; | |
1298 | ||
1299 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1300 | return -EINVAL; | |
1301 | ||
b5e89ed5 DA |
1302 | if (!dma) |
1303 | return -EINVAL; | |
1da177e4 | 1304 | |
b5e89ed5 DA |
1305 | spin_lock(&dev->count_lock); |
1306 | if (atomic_read(&dev->buf_alloc)) { | |
1307 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1308 | return -EBUSY; |
1309 | } | |
1310 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1311 | spin_unlock(&dev->count_lock); |
1da177e4 | 1312 | |
b5e89ed5 | 1313 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1314 | return -EFAULT; |
1315 | ||
b5e89ed5 DA |
1316 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1317 | if (dma->bufs[i].buf_count) | |
1318 | ++count; | |
1da177e4 LT |
1319 | } |
1320 | ||
b5e89ed5 | 1321 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1322 | |
b5e89ed5 DA |
1323 | if (request.count >= count) { |
1324 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { | |
1325 | if (dma->bufs[i].buf_count) { | |
1326 | drm_buf_desc_t __user *to = | |
1327 | &request.list[count]; | |
1da177e4 LT |
1328 | drm_buf_entry_t *from = &dma->bufs[i]; |
1329 | drm_freelist_t *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1330 | if (copy_to_user(&to->count, |
1331 | &from->buf_count, | |
1332 | sizeof(from->buf_count)) || | |
1333 | copy_to_user(&to->size, | |
1334 | &from->buf_size, | |
1335 | sizeof(from->buf_size)) || | |
1336 | copy_to_user(&to->low_mark, | |
1337 | &list->low_mark, | |
1338 | sizeof(list->low_mark)) || | |
1339 | copy_to_user(&to->high_mark, | |
1340 | &list->high_mark, | |
1341 | sizeof(list->high_mark))) | |
1da177e4 LT |
1342 | return -EFAULT; |
1343 | ||
b5e89ed5 DA |
1344 | DRM_DEBUG("%d %d %d %d %d\n", |
1345 | i, | |
1346 | dma->bufs[i].buf_count, | |
1347 | dma->bufs[i].buf_size, | |
1348 | dma->bufs[i].freelist.low_mark, | |
1349 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1350 | ++count; |
1351 | } | |
1352 | } | |
1353 | } | |
1354 | request.count = count; | |
1355 | ||
b5e89ed5 | 1356 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1357 | return -EFAULT; |
1358 | ||
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | /** | |
1363 | * Specifies a low and high water mark for buffer allocation | |
1364 | * | |
1365 | * \param inode device inode. | |
1366 | * \param filp file pointer. | |
1367 | * \param cmd command. | |
1368 | * \param arg a pointer to a drm_buf_desc structure. | |
1369 | * \return zero on success or a negative number on failure. | |
1370 | * | |
1371 | * Verifies that the size order is bounded between the admissible orders and | |
1372 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1373 | * | |
1374 | * \note This ioctl is deprecated and mostly never used. | |
1375 | */ | |
b5e89ed5 DA |
1376 | int drm_markbufs(struct inode *inode, struct file *filp, |
1377 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1378 | { |
1379 | drm_file_t *priv = filp->private_data; | |
1380 | drm_device_t *dev = priv->head->dev; | |
1381 | drm_device_dma_t *dma = dev->dma; | |
1382 | drm_buf_desc_t request; | |
1383 | int order; | |
1384 | drm_buf_entry_t *entry; | |
1385 | ||
1386 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1387 | return -EINVAL; | |
1388 | ||
b5e89ed5 DA |
1389 | if (!dma) |
1390 | return -EINVAL; | |
1da177e4 | 1391 | |
b5e89ed5 DA |
1392 | if (copy_from_user(&request, |
1393 | (drm_buf_desc_t __user *) arg, sizeof(request))) | |
1da177e4 LT |
1394 | return -EFAULT; |
1395 | ||
b5e89ed5 DA |
1396 | DRM_DEBUG("%d, %d, %d\n", |
1397 | request.size, request.low_mark, request.high_mark); | |
1398 | order = drm_order(request.size); | |
1399 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1400 | return -EINVAL; | |
1da177e4 LT |
1401 | entry = &dma->bufs[order]; |
1402 | ||
b5e89ed5 | 1403 | if (request.low_mark < 0 || request.low_mark > entry->buf_count) |
1da177e4 | 1404 | return -EINVAL; |
b5e89ed5 | 1405 | if (request.high_mark < 0 || request.high_mark > entry->buf_count) |
1da177e4 LT |
1406 | return -EINVAL; |
1407 | ||
b5e89ed5 | 1408 | entry->freelist.low_mark = request.low_mark; |
1da177e4 LT |
1409 | entry->freelist.high_mark = request.high_mark; |
1410 | ||
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | /** | |
b5e89ed5 | 1415 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1416 | * |
1417 | * \param inode device inode. | |
1418 | * \param filp file pointer. | |
1419 | * \param cmd command. | |
1420 | * \param arg pointer to a drm_buf_free structure. | |
1421 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1422 | * |
1da177e4 LT |
1423 | * Calls free_buffer() for each used buffer. |
1424 | * This function is primarily used for debugging. | |
1425 | */ | |
b5e89ed5 DA |
1426 | int drm_freebufs(struct inode *inode, struct file *filp, |
1427 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1428 | { |
1429 | drm_file_t *priv = filp->private_data; | |
1430 | drm_device_t *dev = priv->head->dev; | |
1431 | drm_device_dma_t *dma = dev->dma; | |
1432 | drm_buf_free_t request; | |
1433 | int i; | |
1434 | int idx; | |
1435 | drm_buf_t *buf; | |
1436 | ||
1437 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1438 | return -EINVAL; | |
1439 | ||
b5e89ed5 DA |
1440 | if (!dma) |
1441 | return -EINVAL; | |
1da177e4 | 1442 | |
b5e89ed5 DA |
1443 | if (copy_from_user(&request, |
1444 | (drm_buf_free_t __user *) arg, sizeof(request))) | |
1da177e4 LT |
1445 | return -EFAULT; |
1446 | ||
b5e89ed5 DA |
1447 | DRM_DEBUG("%d\n", request.count); |
1448 | for (i = 0; i < request.count; i++) { | |
1449 | if (copy_from_user(&idx, &request.list[i], sizeof(idx))) | |
1da177e4 | 1450 | return -EFAULT; |
b5e89ed5 DA |
1451 | if (idx < 0 || idx >= dma->buf_count) { |
1452 | DRM_ERROR("Index %d (of %d max)\n", | |
1453 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1454 | return -EINVAL; |
1455 | } | |
1456 | buf = dma->buflist[idx]; | |
b5e89ed5 DA |
1457 | if (buf->filp != filp) { |
1458 | DRM_ERROR("Process %d freeing buffer not owned\n", | |
1459 | current->pid); | |
1da177e4 LT |
1460 | return -EINVAL; |
1461 | } | |
b5e89ed5 | 1462 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1463 | } |
1464 | ||
1465 | return 0; | |
1466 | } | |
1467 | ||
1468 | /** | |
1469 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1470 | * | |
1471 | * \param inode device inode. | |
1472 | * \param filp file pointer. | |
1473 | * \param cmd command. | |
1474 | * \param arg pointer to a drm_buf_map structure. | |
1475 | * \return zero on success or a negative number on failure. | |
1476 | * | |
3417f33e GS |
1477 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1478 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1479 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1480 | * drm_mmap_dma(). | |
1da177e4 | 1481 | */ |
b5e89ed5 DA |
1482 | int drm_mapbufs(struct inode *inode, struct file *filp, |
1483 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1484 | { |
1485 | drm_file_t *priv = filp->private_data; | |
1486 | drm_device_t *dev = priv->head->dev; | |
1487 | drm_device_dma_t *dma = dev->dma; | |
1488 | drm_buf_map_t __user *argp = (void __user *)arg; | |
1489 | int retcode = 0; | |
1490 | const int zero = 0; | |
1491 | unsigned long virtual; | |
1492 | unsigned long address; | |
1493 | drm_buf_map_t request; | |
1494 | int i; | |
1495 | ||
1496 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1497 | return -EINVAL; | |
1498 | ||
b5e89ed5 DA |
1499 | if (!dma) |
1500 | return -EINVAL; | |
1da177e4 | 1501 | |
b5e89ed5 DA |
1502 | spin_lock(&dev->count_lock); |
1503 | if (atomic_read(&dev->buf_alloc)) { | |
1504 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1505 | return -EBUSY; |
1506 | } | |
1507 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1508 | spin_unlock(&dev->count_lock); |
1da177e4 | 1509 | |
b5e89ed5 | 1510 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1511 | return -EFAULT; |
1512 | ||
b5e89ed5 | 1513 | if (request.count >= dma->buf_count) { |
b84397d6 | 1514 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1515 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1516 | && (dma->flags & _DRM_DMA_USE_SG)) |
1517 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1518 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
1da177e4 | 1519 | drm_map_t *map = dev->agp_buffer_map; |
d1f2b55a | 1520 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1521 | |
b5e89ed5 | 1522 | if (!map) { |
1da177e4 LT |
1523 | retcode = -EINVAL; |
1524 | goto done; | |
1525 | } | |
1526 | ||
b5e89ed5 DA |
1527 | down_write(¤t->mm->mmap_sem); |
1528 | virtual = do_mmap(filp, 0, map->size, | |
1529 | PROT_READ | PROT_WRITE, | |
1530 | MAP_SHARED, token); | |
1531 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1532 | } else { |
b5e89ed5 DA |
1533 | down_write(¤t->mm->mmap_sem); |
1534 | virtual = do_mmap(filp, 0, dma->byte_count, | |
1535 | PROT_READ | PROT_WRITE, | |
1536 | MAP_SHARED, 0); | |
1537 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1538 | } |
b5e89ed5 | 1539 | if (virtual > -1024UL) { |
1da177e4 LT |
1540 | /* Real error */ |
1541 | retcode = (signed long)virtual; | |
1542 | goto done; | |
1543 | } | |
1544 | request.virtual = (void __user *)virtual; | |
1545 | ||
b5e89ed5 DA |
1546 | for (i = 0; i < dma->buf_count; i++) { |
1547 | if (copy_to_user(&request.list[i].idx, | |
1548 | &dma->buflist[i]->idx, | |
1549 | sizeof(request.list[0].idx))) { | |
1da177e4 LT |
1550 | retcode = -EFAULT; |
1551 | goto done; | |
1552 | } | |
b5e89ed5 DA |
1553 | if (copy_to_user(&request.list[i].total, |
1554 | &dma->buflist[i]->total, | |
1555 | sizeof(request.list[0].total))) { | |
1da177e4 LT |
1556 | retcode = -EFAULT; |
1557 | goto done; | |
1558 | } | |
b5e89ed5 DA |
1559 | if (copy_to_user(&request.list[i].used, |
1560 | &zero, sizeof(zero))) { | |
1da177e4 LT |
1561 | retcode = -EFAULT; |
1562 | goto done; | |
1563 | } | |
b5e89ed5 DA |
1564 | address = virtual + dma->buflist[i]->offset; /* *** */ |
1565 | if (copy_to_user(&request.list[i].address, | |
1566 | &address, sizeof(address))) { | |
1da177e4 LT |
1567 | retcode = -EFAULT; |
1568 | goto done; | |
1569 | } | |
1570 | } | |
1571 | } | |
b5e89ed5 | 1572 | done: |
1da177e4 | 1573 | request.count = dma->buf_count; |
b5e89ed5 | 1574 | DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode); |
1da177e4 | 1575 | |
b5e89ed5 | 1576 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1577 | return -EFAULT; |
1578 | ||
1579 | return retcode; | |
1580 | } | |
1581 | ||
836cf046 DA |
1582 | /** |
1583 | * Compute size order. Returns the exponent of the smaller power of two which | |
1584 | * is greater or equal to given number. | |
b5e89ed5 | 1585 | * |
836cf046 DA |
1586 | * \param size size. |
1587 | * \return order. | |
1588 | * | |
1589 | * \todo Can be made faster. | |
1590 | */ | |
b5e89ed5 | 1591 | int drm_order(unsigned long size) |
836cf046 DA |
1592 | { |
1593 | int order; | |
1594 | unsigned long tmp; | |
1595 | ||
b5e89ed5 | 1596 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1597 | |
1598 | if (size & (size - 1)) | |
1599 | ++order; | |
1600 | ||
1601 | return order; | |
1602 | } | |
1603 | EXPORT_SYMBOL(drm_order); | |
d985c108 DA |
1604 | |
1605 |