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 | |
8d153f71 TH |
80 | if (use_hashed_handle) { |
81 | return drm_ht_just_insert_please(&dev->map_hash, hash, | |
82 | user_token, 32 - PAGE_SHIFT - 3, | |
83 | PAGE_SHIFT, DRM_MAP_HASH_OFFSET); | |
84 | } else { | |
85 | hash->key = user_token; | |
86 | return drm_ht_insert_item(&dev->map_hash, hash); | |
d1f2b55a DA |
87 | } |
88 | } | |
9a186645 | 89 | |
1da177e4 LT |
90 | /** |
91 | * Ioctl to specify a range of memory that is available for mapping by a non-root process. | |
92 | * | |
93 | * \param inode device inode. | |
94 | * \param filp file pointer. | |
95 | * \param cmd command. | |
96 | * \param arg pointer to a drm_map structure. | |
97 | * \return zero on success or a negative value on error. | |
98 | * | |
99 | * Adjusts the memory offset to its absolute value according to the mapping | |
100 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
101 | * applicable and if supported by the kernel. | |
102 | */ | |
b3a83639 DA |
103 | static int drm_addmap_core(drm_device_t * dev, unsigned int offset, |
104 | unsigned int size, drm_map_type_t type, | |
105 | drm_map_flags_t flags, drm_map_list_t ** maplist) | |
1da177e4 | 106 | { |
1da177e4 | 107 | drm_map_t *map; |
1da177e4 | 108 | drm_map_list_t *list; |
9c8da5eb | 109 | drm_dma_handle_t *dmah; |
8d153f71 TH |
110 | unsigned long user_token; |
111 | int ret; | |
1da177e4 | 112 | |
b5e89ed5 DA |
113 | map = drm_alloc(sizeof(*map), DRM_MEM_MAPS); |
114 | if (!map) | |
1da177e4 LT |
115 | return -ENOMEM; |
116 | ||
7ab98401 DA |
117 | map->offset = offset; |
118 | map->size = size; | |
119 | map->flags = flags; | |
120 | map->type = type; | |
1da177e4 LT |
121 | |
122 | /* Only allow shared memory to be removable since we only keep enough | |
123 | * book keeping information about shared memory to allow for removal | |
124 | * when processes fork. | |
125 | */ | |
b5e89ed5 DA |
126 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
127 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
128 | return -EINVAL; |
129 | } | |
b5e89ed5 DA |
130 | DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n", |
131 | map->offset, map->size, map->type); | |
132 | if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) { | |
133 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
134 | return -EINVAL; |
135 | } | |
b5e89ed5 | 136 | map->mtrr = -1; |
1da177e4 LT |
137 | map->handle = NULL; |
138 | ||
b5e89ed5 | 139 | switch (map->type) { |
1da177e4 LT |
140 | case _DRM_REGISTERS: |
141 | case _DRM_FRAME_BUFFER: | |
88f399cd | 142 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) |
8d2ea625 | 143 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 DA |
144 | map->offset < virt_to_phys(high_memory)) { |
145 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
146 | return -EINVAL; |
147 | } | |
148 | #endif | |
149 | #ifdef __alpha__ | |
150 | map->offset += dev->hose->mem_space->start; | |
151 | #endif | |
836cf046 DA |
152 | /* Some drivers preinitialize some maps, without the X Server |
153 | * needing to be aware of it. Therefore, we just return success | |
154 | * when the server tries to create a duplicate map. | |
155 | */ | |
89625eb1 DA |
156 | list = drm_find_matching_map(dev, map); |
157 | if (list != NULL) { | |
158 | if (list->map->size != map->size) { | |
836cf046 | 159 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
160 | "mismatched sizes, (%ld vs %ld)\n", |
161 | map->type, map->size, | |
162 | list->map->size); | |
89625eb1 | 163 | list->map->size = map->size; |
836cf046 DA |
164 | } |
165 | ||
166 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
89625eb1 | 167 | *maplist = list; |
836cf046 DA |
168 | return 0; |
169 | } | |
170 | ||
1da177e4 | 171 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
172 | if (map->type == _DRM_FRAME_BUFFER || |
173 | (map->flags & _DRM_WRITE_COMBINING)) { | |
174 | map->mtrr = mtrr_add(map->offset, map->size, | |
175 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
176 | } |
177 | } | |
178 | if (map->type == _DRM_REGISTERS) | |
b5e89ed5 | 179 | map->handle = drm_ioremap(map->offset, map->size, dev); |
1da177e4 LT |
180 | break; |
181 | ||
182 | case _DRM_SHM: | |
183 | map->handle = vmalloc_32(map->size); | |
b5e89ed5 DA |
184 | DRM_DEBUG("%lu %d %p\n", |
185 | map->size, drm_order(map->size), map->handle); | |
186 | if (!map->handle) { | |
187 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
188 | return -ENOMEM; |
189 | } | |
190 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 191 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 LT |
192 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
193 | if (dev->lock.hw_lock != NULL) { | |
b5e89ed5 DA |
194 | vfree(map->handle); |
195 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
196 | return -EBUSY; |
197 | } | |
b5e89ed5 | 198 | dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
199 | } |
200 | break; | |
201 | case _DRM_AGP: | |
202 | if (drm_core_has_AGP(dev)) { | |
203 | #ifdef __alpha__ | |
204 | map->offset += dev->hose->mem_space->start; | |
205 | #endif | |
206 | map->offset += dev->agp->base; | |
b5e89ed5 | 207 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
1da177e4 LT |
208 | } |
209 | break; | |
210 | case _DRM_SCATTER_GATHER: | |
211 | if (!dev->sg) { | |
212 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
213 | return -EINVAL; | |
214 | } | |
d1f2b55a | 215 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 216 | break; |
b5e89ed5 | 217 | case _DRM_CONSISTENT: |
2d0f9eaf | 218 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 219 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
220 | * casting it down to 32 bits is no problem, but we |
221 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
222 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
223 | if (!dmah) { | |
2d0f9eaf DA |
224 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
225 | return -ENOMEM; | |
226 | } | |
9c8da5eb DA |
227 | map->handle = dmah->vaddr; |
228 | map->offset = (unsigned long)dmah->busaddr; | |
229 | kfree(dmah); | |
2d0f9eaf | 230 | break; |
1da177e4 | 231 | default: |
b5e89ed5 | 232 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
233 | return -EINVAL; |
234 | } | |
235 | ||
236 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); | |
b5e89ed5 | 237 | if (!list) { |
1da177e4 LT |
238 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
239 | return -EINVAL; | |
240 | } | |
241 | memset(list, 0, sizeof(*list)); | |
242 | list->map = map; | |
243 | ||
30e2fb18 | 244 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 245 | list_add(&list->head, &dev->maplist->head); |
8d153f71 | 246 | |
d1f2b55a | 247 | /* Assign a 32-bit handle */ |
30e2fb18 | 248 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
249 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
250 | map->offset; | |
a1d0fcf5 | 251 | ret = drm_map_handle(dev, &list->hash, user_token, 0); |
8d153f71 TH |
252 | if (ret) { |
253 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
254 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); | |
255 | mutex_unlock(&dev->struct_mutex); | |
256 | return ret; | |
257 | } | |
258 | ||
259 | list->user_token = list->hash.key; | |
30e2fb18 | 260 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 261 | |
89625eb1 | 262 | *maplist = list; |
7ab98401 DA |
263 | return 0; |
264 | } | |
89625eb1 | 265 | |
b5e89ed5 | 266 | int drm_addmap(drm_device_t * dev, unsigned int offset, |
89625eb1 | 267 | unsigned int size, drm_map_type_t type, |
b5e89ed5 | 268 | drm_map_flags_t flags, drm_local_map_t ** map_ptr) |
89625eb1 DA |
269 | { |
270 | drm_map_list_t *list; | |
271 | int rc; | |
272 | ||
273 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
274 | if (!rc) | |
275 | *map_ptr = list->map; | |
276 | return rc; | |
277 | } | |
b5e89ed5 | 278 | |
7ab98401 DA |
279 | EXPORT_SYMBOL(drm_addmap); |
280 | ||
281 | int drm_addmap_ioctl(struct inode *inode, struct file *filp, | |
282 | unsigned int cmd, unsigned long arg) | |
283 | { | |
284 | drm_file_t *priv = filp->private_data; | |
285 | drm_device_t *dev = priv->head->dev; | |
286 | drm_map_t map; | |
89625eb1 | 287 | drm_map_list_t *maplist; |
7ab98401 DA |
288 | drm_map_t __user *argp = (void __user *)arg; |
289 | int err; | |
290 | ||
291 | if (!(filp->f_mode & 3)) | |
292 | return -EACCES; /* Require read/write */ | |
293 | ||
b5e89ed5 | 294 | if (copy_from_user(&map, argp, sizeof(map))) { |
1da177e4 | 295 | return -EFAULT; |
7ab98401 DA |
296 | } |
297 | ||
d985c108 DA |
298 | if (!(capable(CAP_SYS_ADMIN) || map.type == _DRM_AGP)) |
299 | return -EPERM; | |
300 | ||
89625eb1 DA |
301 | err = drm_addmap_core(dev, map.offset, map.size, map.type, map.flags, |
302 | &maplist); | |
7ab98401 | 303 | |
b5e89ed5 | 304 | if (err) |
7ab98401 | 305 | return err; |
d1f2b55a | 306 | |
89625eb1 | 307 | if (copy_to_user(argp, maplist->map, sizeof(drm_map_t))) |
d1f2b55a | 308 | return -EFAULT; |
67e1a014 DA |
309 | |
310 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ | |
311 | if (put_user((void *)(unsigned long)maplist->user_token, &argp->handle)) | |
d1f2b55a | 312 | return -EFAULT; |
1da177e4 | 313 | return 0; |
88f399cd | 314 | } |
1da177e4 | 315 | |
1da177e4 LT |
316 | /** |
317 | * Remove a map private from list and deallocate resources if the mapping | |
318 | * isn't in use. | |
319 | * | |
320 | * \param inode device inode. | |
321 | * \param filp file pointer. | |
322 | * \param cmd command. | |
323 | * \param arg pointer to a drm_map_t structure. | |
324 | * \return zero on success or a negative value on error. | |
325 | * | |
326 | * Searches the map on drm_device::maplist, removes it from the list, see if | |
327 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
328 | * being on use. | |
329 | * | |
7ab98401 | 330 | * \sa drm_addmap |
1da177e4 | 331 | */ |
d985c108 | 332 | int drm_rmmap_locked(drm_device_t *dev, drm_local_map_t *map) |
1da177e4 | 333 | { |
1da177e4 LT |
334 | struct list_head *list; |
335 | drm_map_list_t *r_list = NULL; | |
836cf046 | 336 | drm_dma_handle_t dmah; |
1da177e4 | 337 | |
836cf046 | 338 | /* Find the list entry for the map and remove it */ |
1da177e4 LT |
339 | list_for_each(list, &dev->maplist->head) { |
340 | r_list = list_entry(list, drm_map_list_t, head); | |
341 | ||
836cf046 DA |
342 | if (r_list->map == map) { |
343 | list_del(list); | |
8d153f71 | 344 | drm_ht_remove_key(&dev->map_hash, r_list->user_token); |
836cf046 DA |
345 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); |
346 | break; | |
347 | } | |
1da177e4 LT |
348 | } |
349 | ||
836cf046 DA |
350 | /* List has wrapped around to the head pointer, or it's empty and we |
351 | * didn't find anything. | |
1da177e4 | 352 | */ |
836cf046 | 353 | if (list == (&dev->maplist->head)) { |
1da177e4 LT |
354 | return -EINVAL; |
355 | } | |
1da177e4 | 356 | |
836cf046 DA |
357 | switch (map->type) { |
358 | case _DRM_REGISTERS: | |
359 | drm_ioremapfree(map->handle, map->size, dev); | |
360 | /* FALLTHROUGH */ | |
361 | case _DRM_FRAME_BUFFER: | |
362 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
363 | int retcode; | |
b5e89ed5 DA |
364 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
365 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 366 | } |
836cf046 DA |
367 | break; |
368 | case _DRM_SHM: | |
369 | vfree(map->handle); | |
370 | break; | |
371 | case _DRM_AGP: | |
372 | case _DRM_SCATTER_GATHER: | |
373 | break; | |
374 | case _DRM_CONSISTENT: | |
375 | dmah.vaddr = map->handle; | |
376 | dmah.busaddr = map->offset; | |
377 | dmah.size = map->size; | |
378 | __drm_pci_free(dev, &dmah); | |
379 | break; | |
1da177e4 | 380 | } |
836cf046 DA |
381 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
382 | ||
1da177e4 LT |
383 | return 0; |
384 | } | |
836cf046 | 385 | |
d985c108 | 386 | int drm_rmmap(drm_device_t *dev, drm_local_map_t *map) |
836cf046 DA |
387 | { |
388 | int ret; | |
389 | ||
30e2fb18 | 390 | mutex_lock(&dev->struct_mutex); |
836cf046 | 391 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 392 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
393 | |
394 | return ret; | |
395 | } | |
7ab98401 | 396 | |
836cf046 DA |
397 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
398 | * the last close of the device, and this is necessary for cleanup when things | |
399 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
400 | * like a pointless exercise since they're going away anyway. | |
401 | * | |
402 | * One use case might be after addmap is allowed for normal users for SHM and | |
403 | * gets used by drivers that the server doesn't need to care about. This seems | |
404 | * unlikely. | |
405 | */ | |
7ab98401 DA |
406 | int drm_rmmap_ioctl(struct inode *inode, struct file *filp, |
407 | unsigned int cmd, unsigned long arg) | |
408 | { | |
409 | drm_file_t *priv = filp->private_data; | |
410 | drm_device_t *dev = priv->head->dev; | |
411 | drm_map_t request; | |
836cf046 DA |
412 | drm_local_map_t *map = NULL; |
413 | struct list_head *list; | |
414 | int ret; | |
7ab98401 | 415 | |
b5e89ed5 | 416 | if (copy_from_user(&request, (drm_map_t __user *) arg, sizeof(request))) { |
7ab98401 DA |
417 | return -EFAULT; |
418 | } | |
419 | ||
30e2fb18 | 420 | mutex_lock(&dev->struct_mutex); |
836cf046 DA |
421 | list_for_each(list, &dev->maplist->head) { |
422 | drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head); | |
423 | ||
424 | if (r_list->map && | |
b5e89ed5 | 425 | r_list->user_token == (unsigned long)request.handle && |
836cf046 DA |
426 | r_list->map->flags & _DRM_REMOVABLE) { |
427 | map = r_list->map; | |
428 | break; | |
429 | } | |
430 | } | |
431 | ||
432 | /* List has wrapped around to the head pointer, or its empty we didn't | |
433 | * find anything. | |
434 | */ | |
435 | if (list == (&dev->maplist->head)) { | |
30e2fb18 | 436 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
437 | return -EINVAL; |
438 | } | |
439 | ||
7a3f1f21 TH |
440 | if (!map) { |
441 | mutex_unlock(&dev->struct_mutex); | |
836cf046 | 442 | return -EINVAL; |
7a3f1f21 | 443 | } |
836cf046 DA |
444 | |
445 | /* Register and framebuffer maps are permanent */ | |
446 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 447 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
448 | return 0; |
449 | } | |
450 | ||
451 | ret = drm_rmmap_locked(dev, map); | |
452 | ||
30e2fb18 | 453 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
454 | |
455 | return ret; | |
7ab98401 | 456 | } |
1da177e4 LT |
457 | |
458 | /** | |
459 | * Cleanup after an error on one of the addbufs() functions. | |
460 | * | |
836cf046 | 461 | * \param dev DRM device. |
1da177e4 LT |
462 | * \param entry buffer entry where the error occurred. |
463 | * | |
464 | * Frees any pages and buffers associated with the given entry. | |
465 | */ | |
b5e89ed5 | 466 | static void drm_cleanup_buf_error(drm_device_t * dev, drm_buf_entry_t * entry) |
1da177e4 LT |
467 | { |
468 | int i; | |
469 | ||
470 | if (entry->seg_count) { | |
471 | for (i = 0; i < entry->seg_count; i++) { | |
472 | if (entry->seglist[i]) { | |
ddf19b97 | 473 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
474 | } |
475 | } | |
476 | drm_free(entry->seglist, | |
b5e89ed5 DA |
477 | entry->seg_count * |
478 | sizeof(*entry->seglist), DRM_MEM_SEGS); | |
1da177e4 LT |
479 | |
480 | entry->seg_count = 0; | |
481 | } | |
482 | ||
b5e89ed5 DA |
483 | if (entry->buf_count) { |
484 | for (i = 0; i < entry->buf_count; i++) { | |
1da177e4 LT |
485 | if (entry->buflist[i].dev_private) { |
486 | drm_free(entry->buflist[i].dev_private, | |
b5e89ed5 DA |
487 | entry->buflist[i].dev_priv_size, |
488 | DRM_MEM_BUFS); | |
1da177e4 LT |
489 | } |
490 | } | |
491 | drm_free(entry->buflist, | |
b5e89ed5 DA |
492 | entry->buf_count * |
493 | sizeof(*entry->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
494 | |
495 | entry->buf_count = 0; | |
496 | } | |
497 | } | |
498 | ||
499 | #if __OS_HAS_AGP | |
500 | /** | |
d59431bf | 501 | * Add AGP buffers for DMA transfers. |
1da177e4 | 502 | * |
d59431bf DA |
503 | * \param dev drm_device_t to which the buffers are to be added. |
504 | * \param request pointer to a drm_buf_desc_t describing the request. | |
1da177e4 | 505 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 506 | * |
1da177e4 LT |
507 | * After some sanity checks creates a drm_buf structure for each buffer and |
508 | * reallocates the buffer list of the same size order to accommodate the new | |
509 | * buffers. | |
510 | */ | |
b5e89ed5 | 511 | int drm_addbufs_agp(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 512 | { |
1da177e4 | 513 | drm_device_dma_t *dma = dev->dma; |
1da177e4 LT |
514 | drm_buf_entry_t *entry; |
515 | drm_buf_t *buf; | |
516 | unsigned long offset; | |
517 | unsigned long agp_offset; | |
518 | int count; | |
519 | int order; | |
520 | int size; | |
521 | int alignment; | |
522 | int page_order; | |
523 | int total; | |
524 | int byte_count; | |
525 | int i; | |
526 | drm_buf_t **temp_buflist; | |
1da177e4 | 527 | |
b5e89ed5 DA |
528 | if (!dma) |
529 | return -EINVAL; | |
1da177e4 | 530 | |
d59431bf DA |
531 | count = request->count; |
532 | order = drm_order(request->size); | |
1da177e4 LT |
533 | size = 1 << order; |
534 | ||
b5e89ed5 DA |
535 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
536 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
537 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
538 | total = PAGE_SIZE << page_order; | |
539 | ||
540 | byte_count = 0; | |
d59431bf | 541 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 542 | |
b5e89ed5 DA |
543 | DRM_DEBUG("count: %d\n", count); |
544 | DRM_DEBUG("order: %d\n", order); | |
545 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 546 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
547 | DRM_DEBUG("alignment: %d\n", alignment); |
548 | DRM_DEBUG("page_order: %d\n", page_order); | |
549 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 550 | |
b5e89ed5 DA |
551 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
552 | return -EINVAL; | |
553 | if (dev->queue_count) | |
554 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 555 | |
b5e89ed5 DA |
556 | spin_lock(&dev->count_lock); |
557 | if (dev->buf_use) { | |
558 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
559 | return -EBUSY; |
560 | } | |
b5e89ed5 DA |
561 | atomic_inc(&dev->buf_alloc); |
562 | spin_unlock(&dev->count_lock); | |
1da177e4 | 563 | |
30e2fb18 | 564 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 565 | entry = &dma->bufs[order]; |
b5e89ed5 | 566 | if (entry->buf_count) { |
30e2fb18 | 567 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
568 | atomic_dec(&dev->buf_alloc); |
569 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
570 | } |
571 | ||
572 | if (count < 0 || count > 4096) { | |
30e2fb18 | 573 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 574 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
575 | return -EINVAL; |
576 | } | |
577 | ||
b5e89ed5 DA |
578 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
579 | DRM_MEM_BUFS); | |
580 | if (!entry->buflist) { | |
30e2fb18 | 581 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 582 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
583 | return -ENOMEM; |
584 | } | |
b5e89ed5 | 585 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
586 | |
587 | entry->buf_size = size; | |
588 | entry->page_order = page_order; | |
589 | ||
590 | offset = 0; | |
591 | ||
b5e89ed5 DA |
592 | while (entry->buf_count < count) { |
593 | buf = &entry->buflist[entry->buf_count]; | |
594 | buf->idx = dma->buf_count + entry->buf_count; | |
595 | buf->total = alignment; | |
596 | buf->order = order; | |
597 | buf->used = 0; | |
1da177e4 | 598 | |
b5e89ed5 | 599 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
600 | buf->bus_address = agp_offset + offset; |
601 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 602 | buf->next = NULL; |
1da177e4 LT |
603 | buf->waiting = 0; |
604 | buf->pending = 0; | |
b5e89ed5 DA |
605 | init_waitqueue_head(&buf->dma_wait); |
606 | buf->filp = NULL; | |
1da177e4 LT |
607 | |
608 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
609 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
610 | if (!buf->dev_private) { | |
1da177e4 LT |
611 | /* Set count correctly so we free the proper amount. */ |
612 | entry->buf_count = count; | |
b5e89ed5 | 613 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 614 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 615 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
616 | return -ENOMEM; |
617 | } | |
b5e89ed5 | 618 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 619 | |
b5e89ed5 | 620 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
621 | |
622 | offset += alignment; | |
623 | entry->buf_count++; | |
624 | byte_count += PAGE_SIZE << page_order; | |
625 | } | |
626 | ||
b5e89ed5 | 627 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 628 | |
b5e89ed5 DA |
629 | temp_buflist = drm_realloc(dma->buflist, |
630 | dma->buf_count * sizeof(*dma->buflist), | |
631 | (dma->buf_count + entry->buf_count) | |
632 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
633 | if (!temp_buflist) { | |
1da177e4 | 634 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 635 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 636 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 637 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
638 | return -ENOMEM; |
639 | } | |
640 | dma->buflist = temp_buflist; | |
641 | ||
b5e89ed5 | 642 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
643 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
644 | } | |
645 | ||
646 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
647 | dma->seg_count += entry->seg_count; |
648 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
649 | dma->byte_count += byte_count; |
650 | ||
b5e89ed5 DA |
651 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
652 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 653 | |
30e2fb18 | 654 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 655 | |
d59431bf DA |
656 | request->count = entry->buf_count; |
657 | request->size = size; | |
1da177e4 LT |
658 | |
659 | dma->flags = _DRM_DMA_USE_AGP; | |
660 | ||
b5e89ed5 | 661 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
662 | return 0; |
663 | } | |
d84f76d3 | 664 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 665 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 666 | |
b5e89ed5 | 667 | int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 668 | { |
1da177e4 | 669 | drm_device_dma_t *dma = dev->dma; |
1da177e4 LT |
670 | int count; |
671 | int order; | |
672 | int size; | |
673 | int total; | |
674 | int page_order; | |
675 | drm_buf_entry_t *entry; | |
ddf19b97 | 676 | drm_dma_handle_t *dmah; |
1da177e4 LT |
677 | drm_buf_t *buf; |
678 | int alignment; | |
679 | unsigned long offset; | |
680 | int i; | |
681 | int byte_count; | |
682 | int page_count; | |
683 | unsigned long *temp_pagelist; | |
684 | drm_buf_t **temp_buflist; | |
1da177e4 | 685 | |
b5e89ed5 DA |
686 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
687 | return -EINVAL; | |
d985c108 | 688 | |
b5e89ed5 DA |
689 | if (!dma) |
690 | return -EINVAL; | |
1da177e4 | 691 | |
d985c108 DA |
692 | if (!capable(CAP_SYS_ADMIN)) |
693 | return -EPERM; | |
694 | ||
d59431bf DA |
695 | count = request->count; |
696 | order = drm_order(request->size); | |
1da177e4 LT |
697 | size = 1 << order; |
698 | ||
b5e89ed5 DA |
699 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
700 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 701 | |
b5e89ed5 DA |
702 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
703 | return -EINVAL; | |
704 | if (dev->queue_count) | |
705 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 706 | |
d59431bf | 707 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 708 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
709 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
710 | total = PAGE_SIZE << page_order; | |
711 | ||
b5e89ed5 DA |
712 | spin_lock(&dev->count_lock); |
713 | if (dev->buf_use) { | |
714 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
715 | return -EBUSY; |
716 | } | |
b5e89ed5 DA |
717 | atomic_inc(&dev->buf_alloc); |
718 | spin_unlock(&dev->count_lock); | |
1da177e4 | 719 | |
30e2fb18 | 720 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 721 | entry = &dma->bufs[order]; |
b5e89ed5 | 722 | if (entry->buf_count) { |
30e2fb18 | 723 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 724 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
725 | return -ENOMEM; /* May only call once for each order */ |
726 | } | |
727 | ||
728 | if (count < 0 || count > 4096) { | |
30e2fb18 | 729 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 730 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
731 | return -EINVAL; |
732 | } | |
733 | ||
b5e89ed5 DA |
734 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
735 | DRM_MEM_BUFS); | |
736 | if (!entry->buflist) { | |
30e2fb18 | 737 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 738 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
739 | return -ENOMEM; |
740 | } | |
b5e89ed5 DA |
741 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
742 | ||
743 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), | |
744 | DRM_MEM_SEGS); | |
745 | if (!entry->seglist) { | |
746 | drm_free(entry->buflist, | |
747 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
30e2fb18 | 748 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 749 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
750 | return -ENOMEM; |
751 | } | |
b5e89ed5 | 752 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
753 | |
754 | /* Keep the original pagelist until we know all the allocations | |
755 | * have succeeded | |
756 | */ | |
b5e89ed5 DA |
757 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
758 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
1da177e4 | 759 | if (!temp_pagelist) { |
b5e89ed5 DA |
760 | drm_free(entry->buflist, |
761 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
762 | drm_free(entry->seglist, | |
763 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); | |
30e2fb18 | 764 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 765 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
766 | return -ENOMEM; |
767 | } | |
768 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
769 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
770 | DRM_DEBUG("pagelist: %d entries\n", | |
771 | dma->page_count + (count << page_order)); | |
1da177e4 | 772 | |
b5e89ed5 | 773 | entry->buf_size = size; |
1da177e4 LT |
774 | entry->page_order = page_order; |
775 | byte_count = 0; | |
776 | page_count = 0; | |
777 | ||
b5e89ed5 | 778 | while (entry->buf_count < count) { |
ddf19b97 DA |
779 | |
780 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); | |
781 | ||
782 | if (!dmah) { | |
1da177e4 LT |
783 | /* Set count correctly so we free the proper amount. */ |
784 | entry->buf_count = count; | |
785 | entry->seg_count = count; | |
786 | drm_cleanup_buf_error(dev, entry); | |
b5e89ed5 DA |
787 | drm_free(temp_pagelist, |
788 | (dma->page_count + (count << page_order)) | |
789 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 790 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 791 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
792 | return -ENOMEM; |
793 | } | |
ddf19b97 | 794 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
795 | for (i = 0; i < (1 << page_order); i++) { |
796 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
797 | dma->page_count + page_count, | |
ddf19b97 | 798 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 799 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 800 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 801 | } |
b5e89ed5 DA |
802 | for (offset = 0; |
803 | offset + size <= total && entry->buf_count < count; | |
804 | offset += alignment, ++entry->buf_count) { | |
805 | buf = &entry->buflist[entry->buf_count]; | |
806 | buf->idx = dma->buf_count + entry->buf_count; | |
807 | buf->total = alignment; | |
808 | buf->order = order; | |
809 | buf->used = 0; | |
810 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
811 | buf->address = (void *)(dmah->vaddr + offset); |
812 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 813 | buf->next = NULL; |
1da177e4 LT |
814 | buf->waiting = 0; |
815 | buf->pending = 0; | |
b5e89ed5 DA |
816 | init_waitqueue_head(&buf->dma_wait); |
817 | buf->filp = NULL; | |
1da177e4 LT |
818 | |
819 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
820 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
821 | DRM_MEM_BUFS); | |
822 | if (!buf->dev_private) { | |
1da177e4 LT |
823 | /* Set count correctly so we free the proper amount. */ |
824 | entry->buf_count = count; | |
825 | entry->seg_count = count; | |
b5e89ed5 DA |
826 | drm_cleanup_buf_error(dev, entry); |
827 | drm_free(temp_pagelist, | |
828 | (dma->page_count + | |
829 | (count << page_order)) | |
830 | * sizeof(*dma->pagelist), | |
831 | DRM_MEM_PAGES); | |
30e2fb18 | 832 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 833 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
834 | return -ENOMEM; |
835 | } | |
b5e89ed5 | 836 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 837 | |
b5e89ed5 DA |
838 | DRM_DEBUG("buffer %d @ %p\n", |
839 | entry->buf_count, buf->address); | |
1da177e4 LT |
840 | } |
841 | byte_count += PAGE_SIZE << page_order; | |
842 | } | |
843 | ||
b5e89ed5 DA |
844 | temp_buflist = drm_realloc(dma->buflist, |
845 | dma->buf_count * sizeof(*dma->buflist), | |
846 | (dma->buf_count + entry->buf_count) | |
847 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
848 | if (!temp_buflist) { |
849 | /* Free the entry because it isn't valid */ | |
b5e89ed5 DA |
850 | drm_cleanup_buf_error(dev, entry); |
851 | drm_free(temp_pagelist, | |
852 | (dma->page_count + (count << page_order)) | |
853 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 854 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 855 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
856 | return -ENOMEM; |
857 | } | |
858 | dma->buflist = temp_buflist; | |
859 | ||
b5e89ed5 | 860 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
861 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
862 | } | |
863 | ||
864 | /* No allocations failed, so now we can replace the orginal pagelist | |
865 | * with the new one. | |
866 | */ | |
867 | if (dma->page_count) { | |
868 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
869 | dma->page_count * sizeof(*dma->pagelist), |
870 | DRM_MEM_PAGES); | |
1da177e4 LT |
871 | } |
872 | dma->pagelist = temp_pagelist; | |
873 | ||
874 | dma->buf_count += entry->buf_count; | |
875 | dma->seg_count += entry->seg_count; | |
876 | dma->page_count += entry->seg_count << page_order; | |
877 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
878 | ||
30e2fb18 | 879 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 880 | |
d59431bf DA |
881 | request->count = entry->buf_count; |
882 | request->size = size; | |
1da177e4 | 883 | |
b5e89ed5 | 884 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
885 | return 0; |
886 | ||
887 | } | |
d84f76d3 | 888 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 889 | |
b5e89ed5 | 890 | static int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 891 | { |
1da177e4 | 892 | drm_device_dma_t *dma = dev->dma; |
1da177e4 LT |
893 | drm_buf_entry_t *entry; |
894 | drm_buf_t *buf; | |
895 | unsigned long offset; | |
896 | unsigned long agp_offset; | |
897 | int count; | |
898 | int order; | |
899 | int size; | |
900 | int alignment; | |
901 | int page_order; | |
902 | int total; | |
903 | int byte_count; | |
904 | int i; | |
905 | drm_buf_t **temp_buflist; | |
906 | ||
b5e89ed5 DA |
907 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
908 | return -EINVAL; | |
909 | ||
910 | if (!dma) | |
911 | return -EINVAL; | |
1da177e4 | 912 | |
d985c108 DA |
913 | if (!capable(CAP_SYS_ADMIN)) |
914 | return -EPERM; | |
915 | ||
d59431bf DA |
916 | count = request->count; |
917 | order = drm_order(request->size); | |
1da177e4 LT |
918 | size = 1 << order; |
919 | ||
b5e89ed5 DA |
920 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
921 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
922 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
923 | total = PAGE_SIZE << page_order; | |
924 | ||
925 | byte_count = 0; | |
d59431bf | 926 | agp_offset = request->agp_start; |
1da177e4 | 927 | |
b5e89ed5 DA |
928 | DRM_DEBUG("count: %d\n", count); |
929 | DRM_DEBUG("order: %d\n", order); | |
930 | DRM_DEBUG("size: %d\n", size); | |
931 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
932 | DRM_DEBUG("alignment: %d\n", alignment); | |
933 | DRM_DEBUG("page_order: %d\n", page_order); | |
934 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 935 | |
b5e89ed5 DA |
936 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
937 | return -EINVAL; | |
938 | if (dev->queue_count) | |
939 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 940 | |
b5e89ed5 DA |
941 | spin_lock(&dev->count_lock); |
942 | if (dev->buf_use) { | |
943 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
944 | return -EBUSY; |
945 | } | |
b5e89ed5 DA |
946 | atomic_inc(&dev->buf_alloc); |
947 | spin_unlock(&dev->count_lock); | |
1da177e4 | 948 | |
30e2fb18 | 949 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 950 | entry = &dma->bufs[order]; |
b5e89ed5 | 951 | if (entry->buf_count) { |
30e2fb18 | 952 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
953 | atomic_dec(&dev->buf_alloc); |
954 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
955 | } |
956 | ||
957 | if (count < 0 || count > 4096) { | |
30e2fb18 | 958 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 959 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
960 | return -EINVAL; |
961 | } | |
962 | ||
b5e89ed5 DA |
963 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
964 | DRM_MEM_BUFS); | |
965 | if (!entry->buflist) { | |
30e2fb18 | 966 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 967 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
968 | return -ENOMEM; |
969 | } | |
b5e89ed5 | 970 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
971 | |
972 | entry->buf_size = size; | |
973 | entry->page_order = page_order; | |
974 | ||
975 | offset = 0; | |
976 | ||
b5e89ed5 DA |
977 | while (entry->buf_count < count) { |
978 | buf = &entry->buflist[entry->buf_count]; | |
979 | buf->idx = dma->buf_count + entry->buf_count; | |
980 | buf->total = alignment; | |
981 | buf->order = order; | |
982 | buf->used = 0; | |
1da177e4 | 983 | |
b5e89ed5 | 984 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 985 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 986 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 987 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 988 | buf->next = NULL; |
1da177e4 LT |
989 | buf->waiting = 0; |
990 | buf->pending = 0; | |
b5e89ed5 DA |
991 | init_waitqueue_head(&buf->dma_wait); |
992 | buf->filp = NULL; | |
1da177e4 LT |
993 | |
994 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
995 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
996 | if (!buf->dev_private) { | |
1da177e4 LT |
997 | /* Set count correctly so we free the proper amount. */ |
998 | entry->buf_count = count; | |
b5e89ed5 | 999 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1000 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1001 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1002 | return -ENOMEM; |
1003 | } | |
1004 | ||
b5e89ed5 | 1005 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1006 | |
b5e89ed5 | 1007 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1008 | |
1009 | offset += alignment; | |
1010 | entry->buf_count++; | |
1011 | byte_count += PAGE_SIZE << page_order; | |
1012 | } | |
1013 | ||
b5e89ed5 | 1014 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1015 | |
b5e89ed5 DA |
1016 | temp_buflist = drm_realloc(dma->buflist, |
1017 | dma->buf_count * sizeof(*dma->buflist), | |
1018 | (dma->buf_count + entry->buf_count) | |
1019 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1020 | if (!temp_buflist) { | |
1da177e4 | 1021 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1022 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1023 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1024 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1025 | return -ENOMEM; |
1026 | } | |
1027 | dma->buflist = temp_buflist; | |
1028 | ||
b5e89ed5 | 1029 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1030 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1031 | } | |
1032 | ||
1033 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1034 | dma->seg_count += entry->seg_count; |
1035 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1036 | dma->byte_count += byte_count; |
1037 | ||
b5e89ed5 DA |
1038 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1039 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1040 | |
30e2fb18 | 1041 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1042 | |
d59431bf DA |
1043 | request->count = entry->buf_count; |
1044 | request->size = size; | |
1da177e4 LT |
1045 | |
1046 | dma->flags = _DRM_DMA_USE_SG; | |
1047 | ||
b5e89ed5 | 1048 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1049 | return 0; |
1050 | } | |
1051 | ||
5d23fafb | 1052 | static int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request) |
b84397d6 | 1053 | { |
b84397d6 | 1054 | drm_device_dma_t *dma = dev->dma; |
b84397d6 DA |
1055 | drm_buf_entry_t *entry; |
1056 | drm_buf_t *buf; | |
1057 | unsigned long offset; | |
1058 | unsigned long agp_offset; | |
1059 | int count; | |
1060 | int order; | |
1061 | int size; | |
1062 | int alignment; | |
1063 | int page_order; | |
1064 | int total; | |
1065 | int byte_count; | |
1066 | int i; | |
1067 | drm_buf_t **temp_buflist; | |
b84397d6 DA |
1068 | |
1069 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1070 | return -EINVAL; | |
b5e89ed5 | 1071 | |
b84397d6 DA |
1072 | if (!dma) |
1073 | return -EINVAL; | |
1074 | ||
d985c108 DA |
1075 | if (!capable(CAP_SYS_ADMIN)) |
1076 | return -EPERM; | |
1077 | ||
d59431bf DA |
1078 | count = request->count; |
1079 | order = drm_order(request->size); | |
b84397d6 DA |
1080 | size = 1 << order; |
1081 | ||
d59431bf | 1082 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1083 | ? PAGE_ALIGN(size) : size; |
1084 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1085 | total = PAGE_SIZE << page_order; | |
1086 | ||
1087 | byte_count = 0; | |
d59431bf | 1088 | agp_offset = request->agp_start; |
b84397d6 DA |
1089 | |
1090 | DRM_DEBUG("count: %d\n", count); | |
1091 | DRM_DEBUG("order: %d\n", order); | |
1092 | DRM_DEBUG("size: %d\n", size); | |
1093 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1094 | DRM_DEBUG("alignment: %d\n", alignment); | |
1095 | DRM_DEBUG("page_order: %d\n", page_order); | |
1096 | DRM_DEBUG("total: %d\n", total); | |
1097 | ||
1098 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1099 | return -EINVAL; | |
1100 | if (dev->queue_count) | |
1101 | return -EBUSY; /* Not while in use */ | |
1102 | ||
1103 | spin_lock(&dev->count_lock); | |
1104 | if (dev->buf_use) { | |
1105 | spin_unlock(&dev->count_lock); | |
1106 | return -EBUSY; | |
1107 | } | |
1108 | atomic_inc(&dev->buf_alloc); | |
1109 | spin_unlock(&dev->count_lock); | |
1110 | ||
30e2fb18 | 1111 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1112 | entry = &dma->bufs[order]; |
1113 | if (entry->buf_count) { | |
30e2fb18 | 1114 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1115 | atomic_dec(&dev->buf_alloc); |
1116 | return -ENOMEM; /* May only call once for each order */ | |
1117 | } | |
1118 | ||
1119 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1120 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1121 | atomic_dec(&dev->buf_alloc); |
1122 | return -EINVAL; | |
1123 | } | |
1124 | ||
1125 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), | |
1126 | DRM_MEM_BUFS); | |
1127 | if (!entry->buflist) { | |
30e2fb18 | 1128 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1129 | atomic_dec(&dev->buf_alloc); |
1130 | return -ENOMEM; | |
1131 | } | |
1132 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1133 | ||
1134 | entry->buf_size = size; | |
1135 | entry->page_order = page_order; | |
1136 | ||
1137 | offset = 0; | |
1138 | ||
1139 | while (entry->buf_count < count) { | |
1140 | buf = &entry->buflist[entry->buf_count]; | |
1141 | buf->idx = dma->buf_count + entry->buf_count; | |
1142 | buf->total = alignment; | |
1143 | buf->order = order; | |
1144 | buf->used = 0; | |
1145 | ||
1146 | buf->offset = (dma->byte_count + offset); | |
1147 | buf->bus_address = agp_offset + offset; | |
1148 | buf->address = (void *)(agp_offset + offset); | |
1149 | buf->next = NULL; | |
1150 | buf->waiting = 0; | |
1151 | buf->pending = 0; | |
1152 | init_waitqueue_head(&buf->dma_wait); | |
1153 | buf->filp = NULL; | |
1154 | ||
1155 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
1156 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); | |
1157 | if (!buf->dev_private) { | |
1158 | /* Set count correctly so we free the proper amount. */ | |
1159 | entry->buf_count = count; | |
1160 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1161 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1162 | atomic_dec(&dev->buf_alloc); |
1163 | return -ENOMEM; | |
1164 | } | |
1165 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1166 | ||
1167 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1168 | ||
1169 | offset += alignment; | |
1170 | entry->buf_count++; | |
1171 | byte_count += PAGE_SIZE << page_order; | |
1172 | } | |
1173 | ||
1174 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1175 | ||
1176 | temp_buflist = drm_realloc(dma->buflist, | |
1177 | dma->buf_count * sizeof(*dma->buflist), | |
1178 | (dma->buf_count + entry->buf_count) | |
1179 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1180 | if (!temp_buflist) { | |
1181 | /* Free the entry because it isn't valid */ | |
1182 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1183 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1184 | atomic_dec(&dev->buf_alloc); |
1185 | return -ENOMEM; | |
1186 | } | |
1187 | dma->buflist = temp_buflist; | |
1188 | ||
1189 | for (i = 0; i < entry->buf_count; i++) { | |
1190 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1191 | } | |
1192 | ||
1193 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1194 | dma->seg_count += entry->seg_count; |
1195 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1196 | dma->byte_count += byte_count; |
1197 | ||
1198 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1199 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1200 | ||
30e2fb18 | 1201 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1202 | |
d59431bf DA |
1203 | request->count = entry->buf_count; |
1204 | request->size = size; | |
b84397d6 DA |
1205 | |
1206 | dma->flags = _DRM_DMA_USE_FB; | |
1207 | ||
1208 | atomic_dec(&dev->buf_alloc); | |
1209 | return 0; | |
1210 | } | |
d985c108 | 1211 | |
b84397d6 | 1212 | |
1da177e4 LT |
1213 | /** |
1214 | * Add buffers for DMA transfers (ioctl). | |
1215 | * | |
1216 | * \param inode device inode. | |
1217 | * \param filp file pointer. | |
1218 | * \param cmd command. | |
1219 | * \param arg pointer to a drm_buf_desc_t request. | |
1220 | * \return zero on success or a negative number on failure. | |
1221 | * | |
1222 | * According with the memory type specified in drm_buf_desc::flags and the | |
1223 | * build options, it dispatches the call either to addbufs_agp(), | |
1224 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1225 | * PCI memory respectively. | |
1226 | */ | |
b5e89ed5 DA |
1227 | int drm_addbufs(struct inode *inode, struct file *filp, |
1228 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1229 | { |
1230 | drm_buf_desc_t request; | |
1231 | drm_file_t *priv = filp->private_data; | |
1232 | drm_device_t *dev = priv->head->dev; | |
d59431bf | 1233 | int ret; |
b5e89ed5 | 1234 | |
1da177e4 LT |
1235 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1236 | return -EINVAL; | |
1237 | ||
b5e89ed5 DA |
1238 | if (copy_from_user(&request, (drm_buf_desc_t __user *) arg, |
1239 | sizeof(request))) | |
1da177e4 LT |
1240 | return -EFAULT; |
1241 | ||
1242 | #if __OS_HAS_AGP | |
b5e89ed5 DA |
1243 | if (request.flags & _DRM_AGP_BUFFER) |
1244 | ret = drm_addbufs_agp(dev, &request); | |
1da177e4 LT |
1245 | else |
1246 | #endif | |
b5e89ed5 DA |
1247 | if (request.flags & _DRM_SG_BUFFER) |
1248 | ret = drm_addbufs_sg(dev, &request); | |
1249 | else if (request.flags & _DRM_FB_BUFFER) | |
1250 | ret = drm_addbufs_fb(dev, &request); | |
1da177e4 | 1251 | else |
b5e89ed5 | 1252 | ret = drm_addbufs_pci(dev, &request); |
d59431bf | 1253 | |
b5e89ed5 DA |
1254 | if (ret == 0) { |
1255 | if (copy_to_user((void __user *)arg, &request, sizeof(request))) { | |
d59431bf DA |
1256 | ret = -EFAULT; |
1257 | } | |
1258 | } | |
1259 | return ret; | |
1da177e4 LT |
1260 | } |
1261 | ||
1da177e4 LT |
1262 | /** |
1263 | * Get information about the buffer mappings. | |
1264 | * | |
1265 | * This was originally mean for debugging purposes, or by a sophisticated | |
1266 | * client library to determine how best to use the available buffers (e.g., | |
1267 | * large buffers can be used for image transfer). | |
1268 | * | |
1269 | * \param inode device inode. | |
1270 | * \param filp file pointer. | |
1271 | * \param cmd command. | |
1272 | * \param arg pointer to a drm_buf_info structure. | |
1273 | * \return zero on success or a negative number on failure. | |
1274 | * | |
1275 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1276 | * lock, preventing of allocating more buffers after this call. Information | |
1277 | * about each requested buffer is then copied into user space. | |
1278 | */ | |
b5e89ed5 DA |
1279 | int drm_infobufs(struct inode *inode, struct file *filp, |
1280 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1281 | { |
1282 | drm_file_t *priv = filp->private_data; | |
1283 | drm_device_t *dev = priv->head->dev; | |
1284 | drm_device_dma_t *dma = dev->dma; | |
1285 | drm_buf_info_t request; | |
1286 | drm_buf_info_t __user *argp = (void __user *)arg; | |
1287 | int i; | |
1288 | int count; | |
1289 | ||
1290 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1291 | return -EINVAL; | |
1292 | ||
b5e89ed5 DA |
1293 | if (!dma) |
1294 | return -EINVAL; | |
1da177e4 | 1295 | |
b5e89ed5 DA |
1296 | spin_lock(&dev->count_lock); |
1297 | if (atomic_read(&dev->buf_alloc)) { | |
1298 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1299 | return -EBUSY; |
1300 | } | |
1301 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1302 | spin_unlock(&dev->count_lock); |
1da177e4 | 1303 | |
b5e89ed5 | 1304 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1305 | return -EFAULT; |
1306 | ||
b5e89ed5 DA |
1307 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1308 | if (dma->bufs[i].buf_count) | |
1309 | ++count; | |
1da177e4 LT |
1310 | } |
1311 | ||
b5e89ed5 | 1312 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1313 | |
b5e89ed5 DA |
1314 | if (request.count >= count) { |
1315 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { | |
1316 | if (dma->bufs[i].buf_count) { | |
1317 | drm_buf_desc_t __user *to = | |
1318 | &request.list[count]; | |
1da177e4 LT |
1319 | drm_buf_entry_t *from = &dma->bufs[i]; |
1320 | drm_freelist_t *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1321 | if (copy_to_user(&to->count, |
1322 | &from->buf_count, | |
1323 | sizeof(from->buf_count)) || | |
1324 | copy_to_user(&to->size, | |
1325 | &from->buf_size, | |
1326 | sizeof(from->buf_size)) || | |
1327 | copy_to_user(&to->low_mark, | |
1328 | &list->low_mark, | |
1329 | sizeof(list->low_mark)) || | |
1330 | copy_to_user(&to->high_mark, | |
1331 | &list->high_mark, | |
1332 | sizeof(list->high_mark))) | |
1da177e4 LT |
1333 | return -EFAULT; |
1334 | ||
b5e89ed5 DA |
1335 | DRM_DEBUG("%d %d %d %d %d\n", |
1336 | i, | |
1337 | dma->bufs[i].buf_count, | |
1338 | dma->bufs[i].buf_size, | |
1339 | dma->bufs[i].freelist.low_mark, | |
1340 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1341 | ++count; |
1342 | } | |
1343 | } | |
1344 | } | |
1345 | request.count = count; | |
1346 | ||
b5e89ed5 | 1347 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1348 | return -EFAULT; |
1349 | ||
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | /** | |
1354 | * Specifies a low and high water mark for buffer allocation | |
1355 | * | |
1356 | * \param inode device inode. | |
1357 | * \param filp file pointer. | |
1358 | * \param cmd command. | |
1359 | * \param arg a pointer to a drm_buf_desc structure. | |
1360 | * \return zero on success or a negative number on failure. | |
1361 | * | |
1362 | * Verifies that the size order is bounded between the admissible orders and | |
1363 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1364 | * | |
1365 | * \note This ioctl is deprecated and mostly never used. | |
1366 | */ | |
b5e89ed5 DA |
1367 | int drm_markbufs(struct inode *inode, struct file *filp, |
1368 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1369 | { |
1370 | drm_file_t *priv = filp->private_data; | |
1371 | drm_device_t *dev = priv->head->dev; | |
1372 | drm_device_dma_t *dma = dev->dma; | |
1373 | drm_buf_desc_t request; | |
1374 | int order; | |
1375 | drm_buf_entry_t *entry; | |
1376 | ||
1377 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1378 | return -EINVAL; | |
1379 | ||
b5e89ed5 DA |
1380 | if (!dma) |
1381 | return -EINVAL; | |
1da177e4 | 1382 | |
b5e89ed5 DA |
1383 | if (copy_from_user(&request, |
1384 | (drm_buf_desc_t __user *) arg, sizeof(request))) | |
1da177e4 LT |
1385 | return -EFAULT; |
1386 | ||
b5e89ed5 DA |
1387 | DRM_DEBUG("%d, %d, %d\n", |
1388 | request.size, request.low_mark, request.high_mark); | |
1389 | order = drm_order(request.size); | |
1390 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1391 | return -EINVAL; | |
1da177e4 LT |
1392 | entry = &dma->bufs[order]; |
1393 | ||
b5e89ed5 | 1394 | if (request.low_mark < 0 || request.low_mark > entry->buf_count) |
1da177e4 | 1395 | return -EINVAL; |
b5e89ed5 | 1396 | if (request.high_mark < 0 || request.high_mark > entry->buf_count) |
1da177e4 LT |
1397 | return -EINVAL; |
1398 | ||
b5e89ed5 | 1399 | entry->freelist.low_mark = request.low_mark; |
1da177e4 LT |
1400 | entry->freelist.high_mark = request.high_mark; |
1401 | ||
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | /** | |
b5e89ed5 | 1406 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1407 | * |
1408 | * \param inode device inode. | |
1409 | * \param filp file pointer. | |
1410 | * \param cmd command. | |
1411 | * \param arg pointer to a drm_buf_free structure. | |
1412 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1413 | * |
1da177e4 LT |
1414 | * Calls free_buffer() for each used buffer. |
1415 | * This function is primarily used for debugging. | |
1416 | */ | |
b5e89ed5 DA |
1417 | int drm_freebufs(struct inode *inode, struct file *filp, |
1418 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1419 | { |
1420 | drm_file_t *priv = filp->private_data; | |
1421 | drm_device_t *dev = priv->head->dev; | |
1422 | drm_device_dma_t *dma = dev->dma; | |
1423 | drm_buf_free_t request; | |
1424 | int i; | |
1425 | int idx; | |
1426 | drm_buf_t *buf; | |
1427 | ||
1428 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1429 | return -EINVAL; | |
1430 | ||
b5e89ed5 DA |
1431 | if (!dma) |
1432 | return -EINVAL; | |
1da177e4 | 1433 | |
b5e89ed5 DA |
1434 | if (copy_from_user(&request, |
1435 | (drm_buf_free_t __user *) arg, sizeof(request))) | |
1da177e4 LT |
1436 | return -EFAULT; |
1437 | ||
b5e89ed5 DA |
1438 | DRM_DEBUG("%d\n", request.count); |
1439 | for (i = 0; i < request.count; i++) { | |
1440 | if (copy_from_user(&idx, &request.list[i], sizeof(idx))) | |
1da177e4 | 1441 | return -EFAULT; |
b5e89ed5 DA |
1442 | if (idx < 0 || idx >= dma->buf_count) { |
1443 | DRM_ERROR("Index %d (of %d max)\n", | |
1444 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1445 | return -EINVAL; |
1446 | } | |
1447 | buf = dma->buflist[idx]; | |
b5e89ed5 DA |
1448 | if (buf->filp != filp) { |
1449 | DRM_ERROR("Process %d freeing buffer not owned\n", | |
1450 | current->pid); | |
1da177e4 LT |
1451 | return -EINVAL; |
1452 | } | |
b5e89ed5 | 1453 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1454 | } |
1455 | ||
1456 | return 0; | |
1457 | } | |
1458 | ||
1459 | /** | |
1460 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1461 | * | |
1462 | * \param inode device inode. | |
1463 | * \param filp file pointer. | |
1464 | * \param cmd command. | |
1465 | * \param arg pointer to a drm_buf_map structure. | |
1466 | * \return zero on success or a negative number on failure. | |
1467 | * | |
1468 | * Maps the AGP or SG buffer region with do_mmap(), and copies information | |
1469 | * about each buffer into user space. The PCI buffers are already mapped on the | |
1470 | * addbufs_pci() call. | |
1471 | */ | |
b5e89ed5 DA |
1472 | int drm_mapbufs(struct inode *inode, struct file *filp, |
1473 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1474 | { |
1475 | drm_file_t *priv = filp->private_data; | |
1476 | drm_device_t *dev = priv->head->dev; | |
1477 | drm_device_dma_t *dma = dev->dma; | |
1478 | drm_buf_map_t __user *argp = (void __user *)arg; | |
1479 | int retcode = 0; | |
1480 | const int zero = 0; | |
1481 | unsigned long virtual; | |
1482 | unsigned long address; | |
1483 | drm_buf_map_t request; | |
1484 | int i; | |
1485 | ||
1486 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1487 | return -EINVAL; | |
1488 | ||
b5e89ed5 DA |
1489 | if (!dma) |
1490 | return -EINVAL; | |
1da177e4 | 1491 | |
b5e89ed5 DA |
1492 | spin_lock(&dev->count_lock); |
1493 | if (atomic_read(&dev->buf_alloc)) { | |
1494 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1495 | return -EBUSY; |
1496 | } | |
1497 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1498 | spin_unlock(&dev->count_lock); |
1da177e4 | 1499 | |
b5e89ed5 | 1500 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1501 | return -EFAULT; |
1502 | ||
b5e89ed5 | 1503 | if (request.count >= dma->buf_count) { |
b84397d6 | 1504 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1505 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1506 | && (dma->flags & _DRM_DMA_USE_SG)) |
1507 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1508 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
1da177e4 | 1509 | drm_map_t *map = dev->agp_buffer_map; |
d1f2b55a | 1510 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1511 | |
b5e89ed5 | 1512 | if (!map) { |
1da177e4 LT |
1513 | retcode = -EINVAL; |
1514 | goto done; | |
1515 | } | |
1516 | ||
b5e89ed5 DA |
1517 | down_write(¤t->mm->mmap_sem); |
1518 | virtual = do_mmap(filp, 0, map->size, | |
1519 | PROT_READ | PROT_WRITE, | |
1520 | MAP_SHARED, token); | |
1521 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1522 | } else { |
b5e89ed5 DA |
1523 | down_write(¤t->mm->mmap_sem); |
1524 | virtual = do_mmap(filp, 0, dma->byte_count, | |
1525 | PROT_READ | PROT_WRITE, | |
1526 | MAP_SHARED, 0); | |
1527 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1528 | } |
b5e89ed5 | 1529 | if (virtual > -1024UL) { |
1da177e4 LT |
1530 | /* Real error */ |
1531 | retcode = (signed long)virtual; | |
1532 | goto done; | |
1533 | } | |
1534 | request.virtual = (void __user *)virtual; | |
1535 | ||
b5e89ed5 DA |
1536 | for (i = 0; i < dma->buf_count; i++) { |
1537 | if (copy_to_user(&request.list[i].idx, | |
1538 | &dma->buflist[i]->idx, | |
1539 | sizeof(request.list[0].idx))) { | |
1da177e4 LT |
1540 | retcode = -EFAULT; |
1541 | goto done; | |
1542 | } | |
b5e89ed5 DA |
1543 | if (copy_to_user(&request.list[i].total, |
1544 | &dma->buflist[i]->total, | |
1545 | sizeof(request.list[0].total))) { | |
1da177e4 LT |
1546 | retcode = -EFAULT; |
1547 | goto done; | |
1548 | } | |
b5e89ed5 DA |
1549 | if (copy_to_user(&request.list[i].used, |
1550 | &zero, sizeof(zero))) { | |
1da177e4 LT |
1551 | retcode = -EFAULT; |
1552 | goto done; | |
1553 | } | |
b5e89ed5 DA |
1554 | address = virtual + dma->buflist[i]->offset; /* *** */ |
1555 | if (copy_to_user(&request.list[i].address, | |
1556 | &address, sizeof(address))) { | |
1da177e4 LT |
1557 | retcode = -EFAULT; |
1558 | goto done; | |
1559 | } | |
1560 | } | |
1561 | } | |
b5e89ed5 | 1562 | done: |
1da177e4 | 1563 | request.count = dma->buf_count; |
b5e89ed5 | 1564 | DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode); |
1da177e4 | 1565 | |
b5e89ed5 | 1566 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1567 | return -EFAULT; |
1568 | ||
1569 | return retcode; | |
1570 | } | |
1571 | ||
836cf046 DA |
1572 | /** |
1573 | * Compute size order. Returns the exponent of the smaller power of two which | |
1574 | * is greater or equal to given number. | |
b5e89ed5 | 1575 | * |
836cf046 DA |
1576 | * \param size size. |
1577 | * \return order. | |
1578 | * | |
1579 | * \todo Can be made faster. | |
1580 | */ | |
b5e89ed5 | 1581 | int drm_order(unsigned long size) |
836cf046 DA |
1582 | { |
1583 | int order; | |
1584 | unsigned long tmp; | |
1585 | ||
b5e89ed5 | 1586 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1587 | |
1588 | if (size & (size - 1)) | |
1589 | ++order; | |
1590 | ||
1591 | return order; | |
1592 | } | |
1593 | EXPORT_SYMBOL(drm_order); | |
d985c108 DA |
1594 | |
1595 |