Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /** |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 2 | * \file drm_bufs.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Generic buffer template |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 4 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 39 | unsigned long drm_get_resource_start(struct drm_device *dev, unsigned int resource) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | { |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 41 | return pci_resource_start(dev->pdev, resource); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | } |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 43 | EXPORT_SYMBOL(drm_get_resource_start); |
| 44 | |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 45 | unsigned long drm_get_resource_len(struct drm_device *dev, unsigned int resource) |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 46 | { |
| 47 | return pci_resource_len(dev->pdev, resource); |
| 48 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 49 | |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 50 | EXPORT_SYMBOL(drm_get_resource_len); |
| 51 | |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 52 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 53 | drm_local_map_t *map) |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 54 | { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 55 | struct drm_map_list *entry; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 56 | list_for_each_entry(entry, &dev->maplist, head) { |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 57 | if (entry->map && map->type == entry->map->type && |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 58 | ((entry->map->offset == map->offset) || |
| 59 | (map->type == _DRM_SHM && map->flags==_DRM_CONTAINS_LOCK))) { |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 60 | return entry; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 61 | } |
| 62 | } |
| 63 | |
| 64 | return NULL; |
| 65 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
Dave Airlie | e0be428 | 2007-07-12 10:26:44 +1000 | [diff] [blame] | 67 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
Adrian Bunk | fb41e54 | 2006-08-16 11:55:18 +1000 | [diff] [blame] | 68 | unsigned long user_token, int hashed_handle) |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 69 | { |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 70 | int use_hashed_handle; |
Dave Airlie | c2604ce | 2006-08-12 16:03:26 +1000 | [diff] [blame] | 71 | #if (BITS_PER_LONG == 64) |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 72 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
| 73 | #elif (BITS_PER_LONG == 32) |
| 74 | use_hashed_handle = hashed_handle; |
| 75 | #else |
| 76 | #error Unsupported long size. Neither 64 nor 32 bits. |
| 77 | #endif |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 78 | |
Thomas Hellstrom | e08870c | 2006-09-22 04:18:37 +1000 | [diff] [blame] | 79 | if (!use_hashed_handle) { |
| 80 | int ret; |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 81 | hash->key = user_token >> PAGE_SHIFT; |
Thomas Hellstrom | e08870c | 2006-09-22 04:18:37 +1000 | [diff] [blame] | 82 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
| 83 | if (ret != -EINVAL) |
| 84 | return ret; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 85 | } |
Thomas Hellstrom | e08870c | 2006-09-22 04:18:37 +1000 | [diff] [blame] | 86 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
| 87 | user_token, 32 - PAGE_SHIFT - 3, |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 88 | 0, DRM_MAP_HASH_OFFSET >> PAGE_SHIFT); |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 89 | } |
Dave Airlie | 9a18664 | 2005-06-23 21:29:18 +1000 | [diff] [blame] | 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | /** |
| 92 | * Ioctl to specify a range of memory that is available for mapping by a non-root process. |
| 93 | * |
| 94 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 95 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | * \param cmd command. |
| 97 | * \param arg pointer to a drm_map structure. |
| 98 | * \return zero on success or a negative value on error. |
| 99 | * |
| 100 | * Adjusts the memory offset to its absolute value according to the mapping |
| 101 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where |
| 102 | * applicable and if supported by the kernel. |
| 103 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 104 | static int drm_addmap_core(struct drm_device * dev, unsigned int offset, |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 105 | unsigned int size, enum drm_map_type type, |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 106 | enum drm_map_flags flags, |
| 107 | struct drm_map_list ** maplist) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | { |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 109 | struct drm_map *map; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 110 | struct drm_map_list *list; |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 111 | drm_dma_handle_t *dmah; |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 112 | unsigned long user_token; |
| 113 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 115 | map = drm_alloc(sizeof(*map), DRM_MEM_MAPS); |
| 116 | if (!map) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | return -ENOMEM; |
| 118 | |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 119 | map->offset = offset; |
| 120 | map->size = size; |
| 121 | map->flags = flags; |
| 122 | map->type = type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 128 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
| 129 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | return -EINVAL; |
| 131 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | return -EINVAL; |
| 137 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 138 | map->mtrr = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | map->handle = NULL; |
| 140 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 141 | switch (map->type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | case _DRM_REGISTERS: |
| 143 | case _DRM_FRAME_BUFFER: |
Dave Airlie | 88f399c | 2005-08-20 17:43:33 +1000 | [diff] [blame] | 144 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) |
Dave Airlie | 8d2ea62 | 2006-01-11 20:48:09 +1100 | [diff] [blame] | 145 | if (map->offset + (map->size-1) < map->offset || |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 146 | map->offset < virt_to_phys(high_memory)) { |
| 147 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | return -EINVAL; |
| 149 | } |
| 150 | #endif |
| 151 | #ifdef __alpha__ |
| 152 | map->offset += dev->hose->mem_space->start; |
| 153 | #endif |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 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 | */ |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 158 | list = drm_find_matching_map(dev, map); |
| 159 | if (list != NULL) { |
| 160 | if (list->map->size != map->size) { |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 161 | DRM_DEBUG("Matching maps of type %d with " |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 162 | "mismatched sizes, (%ld vs %ld)\n", |
| 163 | map->type, map->size, |
| 164 | list->map->size); |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 165 | list->map->size = map->size; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 169 | *maplist = list; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 170 | return 0; |
| 171 | } |
| 172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | if (drm_core_has_MTRR(dev)) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | } |
| 179 | } |
Scott Thompson | 0769d39 | 2007-08-25 18:17:49 +1000 | [diff] [blame] | 180 | if (map->type == _DRM_REGISTERS) { |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 181 | map->handle = ioremap(map->offset, map->size); |
Scott Thompson | 0769d39 | 2007-08-25 18:17:49 +1000 | [diff] [blame] | 182 | if (!map->handle) { |
| 183 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 184 | return -ENOMEM; |
| 185 | } |
| 186 | } |
Dave Airlie | bc5f452 | 2007-11-05 12:50:58 +1000 | [diff] [blame^] | 187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | case _DRM_SHM: |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 190 | list = drm_find_matching_map(dev, map); |
| 191 | if (list != NULL) { |
| 192 | if(list->map->size != map->size) { |
| 193 | DRM_DEBUG("Matching maps of type %d with " |
| 194 | "mismatched sizes, (%ld vs %ld)\n", |
| 195 | map->type, map->size, list->map->size); |
| 196 | list->map->size = map->size; |
| 197 | } |
| 198 | |
| 199 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 200 | *maplist = list; |
| 201 | return 0; |
| 202 | } |
Thomas Hellstrom | f239b7b | 2007-01-08 21:22:50 +1100 | [diff] [blame] | 203 | map->handle = vmalloc_user(map->size); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 204 | DRM_DEBUG("%lu %d %p\n", |
| 205 | map->size, drm_order(map->size), map->handle); |
| 206 | if (!map->handle) { |
| 207 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | return -ENOMEM; |
| 209 | } |
| 210 | map->offset = (unsigned long)map->handle; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 211 | if (map->flags & _DRM_CONTAINS_LOCK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
| 213 | if (dev->lock.hw_lock != NULL) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 214 | vfree(map->handle); |
| 215 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | return -EBUSY; |
| 217 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 218 | dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | } |
| 220 | break; |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 221 | case _DRM_AGP: { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 222 | struct drm_agp_mem *entry; |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 223 | int valid = 0; |
| 224 | |
| 225 | if (!drm_core_has_AGP(dev)) { |
| 226 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 227 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | } |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 229 | #ifdef __alpha__ |
| 230 | map->offset += dev->hose->mem_space->start; |
| 231 | #endif |
| 232 | /* Note: dev->agp->base may actually be 0 when the DRM |
| 233 | * is not in control of AGP space. But if user space is |
| 234 | * it should already have added the AGP base itself. |
| 235 | */ |
| 236 | map->offset += dev->agp->base; |
| 237 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
| 238 | |
| 239 | /* This assumes the DRM is in total control of AGP space. |
| 240 | * It's not always the case as AGP can be in the control |
| 241 | * of user space (i.e. i810 driver). So this loop will get |
| 242 | * skipped and we double check that dev->agp->memory is |
| 243 | * actually set as well as being invalid before EPERM'ing |
| 244 | */ |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 245 | list_for_each_entry(entry, &dev->agp->memory, head) { |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 246 | if ((map->offset >= entry->bound) && |
| 247 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { |
| 248 | valid = 1; |
| 249 | break; |
| 250 | } |
| 251 | } |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 252 | if (!list_empty(&dev->agp->memory) && !valid) { |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 253 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 254 | return -EPERM; |
| 255 | } |
| 256 | DRM_DEBUG("AGP offset = 0x%08lx, size = 0x%08lx\n", map->offset, map->size); |
| 257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | break; |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 259 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | case _DRM_SCATTER_GATHER: |
| 261 | if (!dev->sg) { |
| 262 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 263 | return -EINVAL; |
| 264 | } |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 265 | map->offset += (unsigned long)dev->sg->virtual; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | break; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 267 | case _DRM_CONSISTENT: |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 268 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 269 | * As we're limiting the address to 2^32-1 (or less), |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 270 | * casting it down to 32 bits is no problem, but we |
| 271 | * need to point to a 64bit variable first. */ |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 272 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
| 273 | if (!dmah) { |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 274 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 275 | return -ENOMEM; |
| 276 | } |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 277 | map->handle = dmah->vaddr; |
| 278 | map->offset = (unsigned long)dmah->busaddr; |
| 279 | kfree(dmah); |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 280 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | default: |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 282 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | return -EINVAL; |
| 284 | } |
| 285 | |
| 286 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 287 | if (!list) { |
Amol Lad | 85abb3f | 2006-10-25 09:55:34 -0700 | [diff] [blame] | 288 | if (map->type == _DRM_REGISTERS) |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 289 | iounmap(map->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 291 | return -EINVAL; |
| 292 | } |
| 293 | memset(list, 0, sizeof(*list)); |
| 294 | list->map = map; |
| 295 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 296 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 297 | list_add(&list->head, &dev->maplist); |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 298 | |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 299 | /* Assign a 32-bit handle */ |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 300 | /* We do it here so that dev->struct_mutex protects the increment */ |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 301 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
| 302 | map->offset; |
Andrew Morton | a1d0fcf | 2006-08-14 11:35:15 +1000 | [diff] [blame] | 303 | ret = drm_map_handle(dev, &list->hash, user_token, 0); |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 304 | if (ret) { |
Amol Lad | 85abb3f | 2006-10-25 09:55:34 -0700 | [diff] [blame] | 305 | if (map->type == _DRM_REGISTERS) |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 306 | iounmap(map->handle); |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 307 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 308 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); |
| 309 | mutex_unlock(&dev->struct_mutex); |
| 310 | return ret; |
| 311 | } |
| 312 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 313 | list->user_token = list->hash.key << PAGE_SHIFT; |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 314 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 316 | *maplist = list; |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 317 | return 0; |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 318 | } |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 319 | |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 320 | int drm_addmap(struct drm_device * dev, unsigned int offset, |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 321 | unsigned int size, enum drm_map_type type, |
| 322 | enum drm_map_flags flags, drm_local_map_t ** map_ptr) |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 323 | { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 324 | struct drm_map_list *list; |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 325 | int rc; |
| 326 | |
| 327 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); |
| 328 | if (!rc) |
| 329 | *map_ptr = list->map; |
| 330 | return rc; |
| 331 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 332 | |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 333 | EXPORT_SYMBOL(drm_addmap); |
| 334 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 335 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
| 336 | struct drm_file *file_priv) |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 337 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 338 | struct drm_map *map = data; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 339 | struct drm_map_list *maplist; |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 340 | int err; |
| 341 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 342 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP)) |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 343 | return -EPERM; |
| 344 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 345 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
| 346 | map->flags, &maplist); |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 347 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 348 | if (err) |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 349 | return err; |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 350 | |
Dave Airlie | 67e1a01 | 2005-10-24 18:41:39 +1000 | [diff] [blame] | 351 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 352 | map->handle = (void *)(unsigned long)maplist->user_token; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | return 0; |
Dave Airlie | 88f399c | 2005-08-20 17:43:33 +1000 | [diff] [blame] | 354 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | /** |
| 357 | * Remove a map private from list and deallocate resources if the mapping |
| 358 | * isn't in use. |
| 359 | * |
| 360 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 361 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | * \param cmd command. |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 363 | * \param arg pointer to a struct drm_map structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | * \return zero on success or a negative value on error. |
| 365 | * |
| 366 | * Searches the map on drm_device::maplist, removes it from the list, see if |
| 367 | * its being used, and free any associate resource (such as MTRR's) if it's not |
| 368 | * being on use. |
| 369 | * |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 370 | * \sa drm_addmap |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 372 | int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 374 | struct drm_map_list *r_list = NULL, *list_t; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 375 | drm_dma_handle_t dmah; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 376 | int found = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 378 | /* Find the list entry for the map and remove it */ |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 379 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 380 | if (r_list->map == map) { |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 381 | list_del(&r_list->head); |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 382 | drm_ht_remove_key(&dev->map_hash, |
| 383 | r_list->user_token >> PAGE_SHIFT); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 384 | drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS); |
| 385 | found = 1; |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 386 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 389 | |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 390 | if (!found) |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 391 | return -EINVAL; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 392 | |
| 393 | switch (map->type) { |
| 394 | case _DRM_REGISTERS: |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 395 | iounmap(map->handle); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 396 | /* FALLTHROUGH */ |
| 397 | case _DRM_FRAME_BUFFER: |
| 398 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { |
| 399 | int retcode; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 400 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
| 401 | DRM_DEBUG("mtrr_del=%d\n", retcode); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 402 | } |
| 403 | break; |
| 404 | case _DRM_SHM: |
| 405 | vfree(map->handle); |
| 406 | break; |
| 407 | case _DRM_AGP: |
| 408 | case _DRM_SCATTER_GATHER: |
| 409 | break; |
| 410 | case _DRM_CONSISTENT: |
| 411 | dmah.vaddr = map->handle; |
| 412 | dmah.busaddr = map->offset; |
| 413 | dmah.size = map->size; |
| 414 | __drm_pci_free(dev, &dmah); |
| 415 | break; |
| 416 | } |
| 417 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | return 0; |
| 420 | } |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 421 | |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 422 | int drm_rmmap(struct drm_device *dev, drm_local_map_t *map) |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 423 | { |
| 424 | int ret; |
| 425 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 426 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 427 | ret = drm_rmmap_locked(dev, map); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 428 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 429 | |
| 430 | return ret; |
| 431 | } |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 432 | |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 433 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
| 434 | * the last close of the device, and this is necessary for cleanup when things |
| 435 | * exit uncleanly. Therefore, having userland manually remove mappings seems |
| 436 | * like a pointless exercise since they're going away anyway. |
| 437 | * |
| 438 | * One use case might be after addmap is allowed for normal users for SHM and |
| 439 | * gets used by drivers that the server doesn't need to care about. This seems |
| 440 | * unlikely. |
| 441 | */ |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 442 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
| 443 | struct drm_file *file_priv) |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 444 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 445 | struct drm_map *request = data; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 446 | drm_local_map_t *map = NULL; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 447 | struct drm_map_list *r_list; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 448 | int ret; |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 449 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 450 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 451 | list_for_each_entry(r_list, &dev->maplist, head) { |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 452 | if (r_list->map && |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 453 | r_list->user_token == (unsigned long)request->handle && |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 454 | r_list->map->flags & _DRM_REMOVABLE) { |
| 455 | map = r_list->map; |
| 456 | break; |
| 457 | } |
| 458 | } |
| 459 | |
| 460 | /* List has wrapped around to the head pointer, or its empty we didn't |
| 461 | * find anything. |
| 462 | */ |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 463 | if (list_empty(&dev->maplist) || !map) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 464 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 465 | return -EINVAL; |
| 466 | } |
| 467 | |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 468 | /* Register and framebuffer maps are permanent */ |
| 469 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 470 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | ret = drm_rmmap_locked(dev, map); |
| 475 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 476 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 477 | |
| 478 | return ret; |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 479 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
| 481 | /** |
| 482 | * Cleanup after an error on one of the addbufs() functions. |
| 483 | * |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 484 | * \param dev DRM device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | * \param entry buffer entry where the error occurred. |
| 486 | * |
| 487 | * Frees any pages and buffers associated with the given entry. |
| 488 | */ |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 489 | static void drm_cleanup_buf_error(struct drm_device * dev, |
| 490 | struct drm_buf_entry * entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | { |
| 492 | int i; |
| 493 | |
| 494 | if (entry->seg_count) { |
| 495 | for (i = 0; i < entry->seg_count; i++) { |
| 496 | if (entry->seglist[i]) { |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 497 | drm_pci_free(dev, entry->seglist[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | } |
| 499 | } |
| 500 | drm_free(entry->seglist, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 501 | entry->seg_count * |
| 502 | sizeof(*entry->seglist), DRM_MEM_SEGS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
| 504 | entry->seg_count = 0; |
| 505 | } |
| 506 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 507 | if (entry->buf_count) { |
| 508 | for (i = 0; i < entry->buf_count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | if (entry->buflist[i].dev_private) { |
| 510 | drm_free(entry->buflist[i].dev_private, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 511 | entry->buflist[i].dev_priv_size, |
| 512 | DRM_MEM_BUFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | } |
| 514 | } |
| 515 | drm_free(entry->buflist, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 516 | entry->buf_count * |
| 517 | sizeof(*entry->buflist), DRM_MEM_BUFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | |
| 519 | entry->buf_count = 0; |
| 520 | } |
| 521 | } |
| 522 | |
| 523 | #if __OS_HAS_AGP |
| 524 | /** |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 525 | * Add AGP buffers for DMA transfers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | * |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 527 | * \param dev struct drm_device to which the buffers are to be added. |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 528 | * \param request pointer to a struct drm_buf_desc describing the request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | * \return zero on success or a negative number on failure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 530 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | * After some sanity checks creates a drm_buf structure for each buffer and |
| 532 | * reallocates the buffer list of the same size order to accommodate the new |
| 533 | * buffers. |
| 534 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 535 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 537 | struct drm_device_dma *dma = dev->dma; |
| 538 | struct drm_buf_entry *entry; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 539 | struct drm_agp_mem *agp_entry; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 540 | struct drm_buf *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | unsigned long offset; |
| 542 | unsigned long agp_offset; |
| 543 | int count; |
| 544 | int order; |
| 545 | int size; |
| 546 | int alignment; |
| 547 | int page_order; |
| 548 | int total; |
| 549 | int byte_count; |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 550 | int i, valid; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 551 | struct drm_buf **temp_buflist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 553 | if (!dma) |
| 554 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 556 | count = request->count; |
| 557 | order = drm_order(request->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | size = 1 << order; |
| 559 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 560 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
| 561 | ? PAGE_ALIGN(size) : size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
| 563 | total = PAGE_SIZE << page_order; |
| 564 | |
| 565 | byte_count = 0; |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 566 | agp_offset = dev->agp->base + request->agp_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 568 | DRM_DEBUG("count: %d\n", count); |
| 569 | DRM_DEBUG("order: %d\n", order); |
| 570 | DRM_DEBUG("size: %d\n", size); |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 571 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 572 | DRM_DEBUG("alignment: %d\n", alignment); |
| 573 | DRM_DEBUG("page_order: %d\n", page_order); |
| 574 | DRM_DEBUG("total: %d\n", total); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 576 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
| 577 | return -EINVAL; |
| 578 | if (dev->queue_count) |
| 579 | return -EBUSY; /* Not while in use */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 581 | /* Make sure buffers are located in AGP memory that we own */ |
| 582 | valid = 0; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 583 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 584 | if ((agp_offset >= agp_entry->bound) && |
| 585 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { |
| 586 | valid = 1; |
| 587 | break; |
| 588 | } |
| 589 | } |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 590 | if (!list_empty(&dev->agp->memory) && !valid) { |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 591 | DRM_DEBUG("zone invalid\n"); |
| 592 | return -EINVAL; |
| 593 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 594 | spin_lock(&dev->count_lock); |
| 595 | if (dev->buf_use) { |
| 596 | spin_unlock(&dev->count_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | return -EBUSY; |
| 598 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 599 | atomic_inc(&dev->buf_alloc); |
| 600 | spin_unlock(&dev->count_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 602 | mutex_lock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | entry = &dma->bufs[order]; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 604 | if (entry->buf_count) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 605 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 606 | atomic_dec(&dev->buf_alloc); |
| 607 | return -ENOMEM; /* May only call once for each order */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | } |
| 609 | |
| 610 | if (count < 0 || count > 4096) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 611 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 612 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | return -EINVAL; |
| 614 | } |
| 615 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 616 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
| 617 | DRM_MEM_BUFS); |
| 618 | if (!entry->buflist) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 619 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 620 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | return -ENOMEM; |
| 622 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 623 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | |
| 625 | entry->buf_size = size; |
| 626 | entry->page_order = page_order; |
| 627 | |
| 628 | offset = 0; |
| 629 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 630 | while (entry->buf_count < count) { |
| 631 | buf = &entry->buflist[entry->buf_count]; |
| 632 | buf->idx = dma->buf_count + entry->buf_count; |
| 633 | buf->total = alignment; |
| 634 | buf->order = order; |
| 635 | buf->used = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 637 | buf->offset = (dma->byte_count + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | buf->bus_address = agp_offset + offset; |
| 639 | buf->address = (void *)(agp_offset + offset); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 640 | buf->next = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | buf->waiting = 0; |
| 642 | buf->pending = 0; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 643 | init_waitqueue_head(&buf->dma_wait); |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 644 | buf->file_priv = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | |
| 646 | buf->dev_priv_size = dev->driver->dev_priv_size; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 647 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
| 648 | if (!buf->dev_private) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | /* Set count correctly so we free the proper amount. */ |
| 650 | entry->buf_count = count; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 651 | drm_cleanup_buf_error(dev, entry); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 652 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 653 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | return -ENOMEM; |
| 655 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 656 | memset(buf->dev_private, 0, buf->dev_priv_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 658 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | |
| 660 | offset += alignment; |
| 661 | entry->buf_count++; |
| 662 | byte_count += PAGE_SIZE << page_order; |
| 663 | } |
| 664 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 665 | DRM_DEBUG("byte_count: %d\n", byte_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 667 | temp_buflist = drm_realloc(dma->buflist, |
| 668 | dma->buf_count * sizeof(*dma->buflist), |
| 669 | (dma->buf_count + entry->buf_count) |
| 670 | * sizeof(*dma->buflist), DRM_MEM_BUFS); |
| 671 | if (!temp_buflist) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | /* Free the entry because it isn't valid */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 673 | drm_cleanup_buf_error(dev, entry); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 674 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 675 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | return -ENOMEM; |
| 677 | } |
| 678 | dma->buflist = temp_buflist; |
| 679 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 680 | for (i = 0; i < entry->buf_count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
| 682 | } |
| 683 | |
| 684 | dma->buf_count += entry->buf_count; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 685 | dma->seg_count += entry->seg_count; |
| 686 | dma->page_count += byte_count >> PAGE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | dma->byte_count += byte_count; |
| 688 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 689 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
| 690 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 692 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 694 | request->count = entry->buf_count; |
| 695 | request->size = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | |
| 697 | dma->flags = _DRM_DMA_USE_AGP; |
| 698 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 699 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | return 0; |
| 701 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 702 | EXPORT_SYMBOL(drm_addbufs_agp); |
| 703 | #endif /* __OS_HAS_AGP */ |
| 704 | |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 705 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 707 | struct drm_device_dma *dma = dev->dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | int count; |
| 709 | int order; |
| 710 | int size; |
| 711 | int total; |
| 712 | int page_order; |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 713 | struct drm_buf_entry *entry; |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 714 | drm_dma_handle_t *dmah; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 715 | struct drm_buf *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | int alignment; |
| 717 | unsigned long offset; |
| 718 | int i; |
| 719 | int byte_count; |
| 720 | int page_count; |
| 721 | unsigned long *temp_pagelist; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 722 | struct drm_buf **temp_buflist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 724 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
| 725 | return -EINVAL; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 726 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 727 | if (!dma) |
| 728 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 730 | if (!capable(CAP_SYS_ADMIN)) |
| 731 | return -EPERM; |
| 732 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 733 | count = request->count; |
| 734 | order = drm_order(request->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | size = 1 << order; |
| 736 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 737 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
| 738 | request->count, request->size, size, order, dev->queue_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 740 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
| 741 | return -EINVAL; |
| 742 | if (dev->queue_count) |
| 743 | return -EBUSY; /* Not while in use */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 745 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 746 | ? PAGE_ALIGN(size) : size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
| 748 | total = PAGE_SIZE << page_order; |
| 749 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 750 | spin_lock(&dev->count_lock); |
| 751 | if (dev->buf_use) { |
| 752 | spin_unlock(&dev->count_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | return -EBUSY; |
| 754 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 755 | atomic_inc(&dev->buf_alloc); |
| 756 | spin_unlock(&dev->count_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 758 | mutex_lock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | entry = &dma->bufs[order]; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 760 | if (entry->buf_count) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 761 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 762 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | return -ENOMEM; /* May only call once for each order */ |
| 764 | } |
| 765 | |
| 766 | if (count < 0 || count > 4096) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 767 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 768 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | return -EINVAL; |
| 770 | } |
| 771 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 772 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
| 773 | DRM_MEM_BUFS); |
| 774 | if (!entry->buflist) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 775 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 776 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | return -ENOMEM; |
| 778 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 779 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 781 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), |
| 782 | DRM_MEM_SEGS); |
| 783 | if (!entry->seglist) { |
| 784 | drm_free(entry->buflist, |
| 785 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 786 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 787 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | return -ENOMEM; |
| 789 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 790 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | |
| 792 | /* Keep the original pagelist until we know all the allocations |
| 793 | * have succeeded |
| 794 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 795 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
| 796 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | if (!temp_pagelist) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 798 | drm_free(entry->buflist, |
| 799 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); |
| 800 | drm_free(entry->seglist, |
| 801 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 802 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 803 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | return -ENOMEM; |
| 805 | } |
| 806 | memcpy(temp_pagelist, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 807 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
| 808 | DRM_DEBUG("pagelist: %d entries\n", |
| 809 | dma->page_count + (count << page_order)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 811 | entry->buf_size = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | entry->page_order = page_order; |
| 813 | byte_count = 0; |
| 814 | page_count = 0; |
| 815 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 816 | while (entry->buf_count < count) { |
Dave Airlie | bc5f452 | 2007-11-05 12:50:58 +1000 | [diff] [blame^] | 817 | |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 818 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); |
Dave Airlie | bc5f452 | 2007-11-05 12:50:58 +1000 | [diff] [blame^] | 819 | |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 820 | if (!dmah) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | /* Set count correctly so we free the proper amount. */ |
| 822 | entry->buf_count = count; |
| 823 | entry->seg_count = count; |
| 824 | drm_cleanup_buf_error(dev, entry); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 825 | drm_free(temp_pagelist, |
| 826 | (dma->page_count + (count << page_order)) |
| 827 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 828 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 829 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | return -ENOMEM; |
| 831 | } |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 832 | entry->seglist[entry->seg_count++] = dmah; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 833 | for (i = 0; i < (1 << page_order); i++) { |
| 834 | DRM_DEBUG("page %d @ 0x%08lx\n", |
| 835 | dma->page_count + page_count, |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 836 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | temp_pagelist[dma->page_count + page_count++] |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 838 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 840 | for (offset = 0; |
| 841 | offset + size <= total && entry->buf_count < count; |
| 842 | offset += alignment, ++entry->buf_count) { |
| 843 | buf = &entry->buflist[entry->buf_count]; |
| 844 | buf->idx = dma->buf_count + entry->buf_count; |
| 845 | buf->total = alignment; |
| 846 | buf->order = order; |
| 847 | buf->used = 0; |
| 848 | buf->offset = (dma->byte_count + byte_count + offset); |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 849 | buf->address = (void *)(dmah->vaddr + offset); |
| 850 | buf->bus_address = dmah->busaddr + offset; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 851 | buf->next = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | buf->waiting = 0; |
| 853 | buf->pending = 0; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 854 | init_waitqueue_head(&buf->dma_wait); |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 855 | buf->file_priv = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | |
| 857 | buf->dev_priv_size = dev->driver->dev_priv_size; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 858 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
| 859 | DRM_MEM_BUFS); |
| 860 | if (!buf->dev_private) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | /* Set count correctly so we free the proper amount. */ |
| 862 | entry->buf_count = count; |
| 863 | entry->seg_count = count; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 864 | drm_cleanup_buf_error(dev, entry); |
| 865 | drm_free(temp_pagelist, |
| 866 | (dma->page_count + |
| 867 | (count << page_order)) |
| 868 | * sizeof(*dma->pagelist), |
| 869 | DRM_MEM_PAGES); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 870 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 871 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | return -ENOMEM; |
| 873 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 874 | memset(buf->dev_private, 0, buf->dev_priv_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 876 | DRM_DEBUG("buffer %d @ %p\n", |
| 877 | entry->buf_count, buf->address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | } |
| 879 | byte_count += PAGE_SIZE << page_order; |
| 880 | } |
| 881 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 882 | temp_buflist = drm_realloc(dma->buflist, |
| 883 | dma->buf_count * sizeof(*dma->buflist), |
| 884 | (dma->buf_count + entry->buf_count) |
| 885 | * sizeof(*dma->buflist), DRM_MEM_BUFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | if (!temp_buflist) { |
| 887 | /* Free the entry because it isn't valid */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 888 | drm_cleanup_buf_error(dev, entry); |
| 889 | drm_free(temp_pagelist, |
| 890 | (dma->page_count + (count << page_order)) |
| 891 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 892 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 893 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | return -ENOMEM; |
| 895 | } |
| 896 | dma->buflist = temp_buflist; |
| 897 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 898 | for (i = 0; i < entry->buf_count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
| 900 | } |
| 901 | |
| 902 | /* No allocations failed, so now we can replace the orginal pagelist |
| 903 | * with the new one. |
| 904 | */ |
| 905 | if (dma->page_count) { |
| 906 | drm_free(dma->pagelist, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 907 | dma->page_count * sizeof(*dma->pagelist), |
| 908 | DRM_MEM_PAGES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | } |
| 910 | dma->pagelist = temp_pagelist; |
| 911 | |
| 912 | dma->buf_count += entry->buf_count; |
| 913 | dma->seg_count += entry->seg_count; |
| 914 | dma->page_count += entry->seg_count << page_order; |
| 915 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); |
| 916 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 917 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 919 | request->count = entry->buf_count; |
| 920 | request->size = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
George Sapountzis | 3417f33 | 2006-10-24 12:03:04 -0700 | [diff] [blame] | 922 | if (request->flags & _DRM_PCI_BUFFER_RO) |
| 923 | dma->flags = _DRM_DMA_USE_PCI_RO; |
| 924 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 925 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | return 0; |
| 927 | |
| 928 | } |
Dave Airlie | d84f76d | 2005-07-10 17:04:22 +1000 | [diff] [blame] | 929 | EXPORT_SYMBOL(drm_addbufs_pci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 931 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 933 | struct drm_device_dma *dma = dev->dma; |
| 934 | struct drm_buf_entry *entry; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 935 | struct drm_buf *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | unsigned long offset; |
| 937 | unsigned long agp_offset; |
| 938 | int count; |
| 939 | int order; |
| 940 | int size; |
| 941 | int alignment; |
| 942 | int page_order; |
| 943 | int total; |
| 944 | int byte_count; |
| 945 | int i; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 946 | struct drm_buf **temp_buflist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 948 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
| 949 | return -EINVAL; |
| 950 | |
| 951 | if (!dma) |
| 952 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 954 | if (!capable(CAP_SYS_ADMIN)) |
| 955 | return -EPERM; |
| 956 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 957 | count = request->count; |
| 958 | order = drm_order(request->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | size = 1 << order; |
| 960 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 961 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
| 962 | ? PAGE_ALIGN(size) : size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
| 964 | total = PAGE_SIZE << page_order; |
| 965 | |
| 966 | byte_count = 0; |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 967 | agp_offset = request->agp_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 969 | DRM_DEBUG("count: %d\n", count); |
| 970 | DRM_DEBUG("order: %d\n", order); |
| 971 | DRM_DEBUG("size: %d\n", size); |
| 972 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); |
| 973 | DRM_DEBUG("alignment: %d\n", alignment); |
| 974 | DRM_DEBUG("page_order: %d\n", page_order); |
| 975 | DRM_DEBUG("total: %d\n", total); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 977 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
| 978 | return -EINVAL; |
| 979 | if (dev->queue_count) |
| 980 | return -EBUSY; /* Not while in use */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 982 | spin_lock(&dev->count_lock); |
| 983 | if (dev->buf_use) { |
| 984 | spin_unlock(&dev->count_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | return -EBUSY; |
| 986 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 987 | atomic_inc(&dev->buf_alloc); |
| 988 | spin_unlock(&dev->count_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 990 | mutex_lock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | entry = &dma->bufs[order]; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 992 | if (entry->buf_count) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 993 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 994 | atomic_dec(&dev->buf_alloc); |
| 995 | return -ENOMEM; /* May only call once for each order */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | } |
| 997 | |
| 998 | if (count < 0 || count > 4096) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 999 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1000 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | return -EINVAL; |
| 1002 | } |
| 1003 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1004 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
| 1005 | DRM_MEM_BUFS); |
| 1006 | if (!entry->buflist) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1007 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1008 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | return -ENOMEM; |
| 1010 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1011 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
| 1013 | entry->buf_size = size; |
| 1014 | entry->page_order = page_order; |
| 1015 | |
| 1016 | offset = 0; |
| 1017 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1018 | while (entry->buf_count < count) { |
| 1019 | buf = &entry->buflist[entry->buf_count]; |
| 1020 | buf->idx = dma->buf_count + entry->buf_count; |
| 1021 | buf->total = alignment; |
| 1022 | buf->order = order; |
| 1023 | buf->used = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1025 | buf->offset = (dma->byte_count + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | buf->bus_address = agp_offset + offset; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1027 | buf->address = (void *)(agp_offset + offset |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 1028 | + (unsigned long)dev->sg->virtual); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1029 | buf->next = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | buf->waiting = 0; |
| 1031 | buf->pending = 0; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1032 | init_waitqueue_head(&buf->dma_wait); |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1033 | buf->file_priv = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | |
| 1035 | buf->dev_priv_size = dev->driver->dev_priv_size; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1036 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
| 1037 | if (!buf->dev_private) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | /* Set count correctly so we free the proper amount. */ |
| 1039 | entry->buf_count = count; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1040 | drm_cleanup_buf_error(dev, entry); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1041 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1042 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | return -ENOMEM; |
| 1044 | } |
| 1045 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1046 | memset(buf->dev_private, 0, buf->dev_priv_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1048 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | |
| 1050 | offset += alignment; |
| 1051 | entry->buf_count++; |
| 1052 | byte_count += PAGE_SIZE << page_order; |
| 1053 | } |
| 1054 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1055 | DRM_DEBUG("byte_count: %d\n", byte_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1057 | temp_buflist = drm_realloc(dma->buflist, |
| 1058 | dma->buf_count * sizeof(*dma->buflist), |
| 1059 | (dma->buf_count + entry->buf_count) |
| 1060 | * sizeof(*dma->buflist), DRM_MEM_BUFS); |
| 1061 | if (!temp_buflist) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | /* Free the entry because it isn't valid */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1063 | drm_cleanup_buf_error(dev, entry); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1064 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1065 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | return -ENOMEM; |
| 1067 | } |
| 1068 | dma->buflist = temp_buflist; |
| 1069 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1070 | for (i = 0; i < entry->buf_count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
| 1072 | } |
| 1073 | |
| 1074 | dma->buf_count += entry->buf_count; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 1075 | dma->seg_count += entry->seg_count; |
| 1076 | dma->page_count += byte_count >> PAGE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | dma->byte_count += byte_count; |
| 1078 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1079 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
| 1080 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1082 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1084 | request->count = entry->buf_count; |
| 1085 | request->size = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | |
| 1087 | dma->flags = _DRM_DMA_USE_SG; |
| 1088 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1089 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | return 0; |
| 1091 | } |
| 1092 | |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 1093 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1094 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1095 | struct drm_device_dma *dma = dev->dma; |
| 1096 | struct drm_buf_entry *entry; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 1097 | struct drm_buf *buf; |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1098 | unsigned long offset; |
| 1099 | unsigned long agp_offset; |
| 1100 | int count; |
| 1101 | int order; |
| 1102 | int size; |
| 1103 | int alignment; |
| 1104 | int page_order; |
| 1105 | int total; |
| 1106 | int byte_count; |
| 1107 | int i; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 1108 | struct drm_buf **temp_buflist; |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1109 | |
| 1110 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) |
| 1111 | return -EINVAL; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1112 | |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1113 | if (!dma) |
| 1114 | return -EINVAL; |
| 1115 | |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 1116 | if (!capable(CAP_SYS_ADMIN)) |
| 1117 | return -EPERM; |
| 1118 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1119 | count = request->count; |
| 1120 | order = drm_order(request->size); |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1121 | size = 1 << order; |
| 1122 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1123 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1124 | ? PAGE_ALIGN(size) : size; |
| 1125 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
| 1126 | total = PAGE_SIZE << page_order; |
| 1127 | |
| 1128 | byte_count = 0; |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1129 | agp_offset = request->agp_start; |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1130 | |
| 1131 | DRM_DEBUG("count: %d\n", count); |
| 1132 | DRM_DEBUG("order: %d\n", order); |
| 1133 | DRM_DEBUG("size: %d\n", size); |
| 1134 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); |
| 1135 | DRM_DEBUG("alignment: %d\n", alignment); |
| 1136 | DRM_DEBUG("page_order: %d\n", page_order); |
| 1137 | DRM_DEBUG("total: %d\n", total); |
| 1138 | |
| 1139 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
| 1140 | return -EINVAL; |
| 1141 | if (dev->queue_count) |
| 1142 | return -EBUSY; /* Not while in use */ |
| 1143 | |
| 1144 | spin_lock(&dev->count_lock); |
| 1145 | if (dev->buf_use) { |
| 1146 | spin_unlock(&dev->count_lock); |
| 1147 | return -EBUSY; |
| 1148 | } |
| 1149 | atomic_inc(&dev->buf_alloc); |
| 1150 | spin_unlock(&dev->count_lock); |
| 1151 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1152 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1153 | entry = &dma->bufs[order]; |
| 1154 | if (entry->buf_count) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1155 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1156 | atomic_dec(&dev->buf_alloc); |
| 1157 | return -ENOMEM; /* May only call once for each order */ |
| 1158 | } |
| 1159 | |
| 1160 | if (count < 0 || count > 4096) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1161 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1162 | atomic_dec(&dev->buf_alloc); |
| 1163 | return -EINVAL; |
| 1164 | } |
| 1165 | |
| 1166 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
| 1167 | DRM_MEM_BUFS); |
| 1168 | if (!entry->buflist) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1169 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1170 | atomic_dec(&dev->buf_alloc); |
| 1171 | return -ENOMEM; |
| 1172 | } |
| 1173 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
| 1174 | |
| 1175 | entry->buf_size = size; |
| 1176 | entry->page_order = page_order; |
| 1177 | |
| 1178 | offset = 0; |
| 1179 | |
| 1180 | while (entry->buf_count < count) { |
| 1181 | buf = &entry->buflist[entry->buf_count]; |
| 1182 | buf->idx = dma->buf_count + entry->buf_count; |
| 1183 | buf->total = alignment; |
| 1184 | buf->order = order; |
| 1185 | buf->used = 0; |
| 1186 | |
| 1187 | buf->offset = (dma->byte_count + offset); |
| 1188 | buf->bus_address = agp_offset + offset; |
| 1189 | buf->address = (void *)(agp_offset + offset); |
| 1190 | buf->next = NULL; |
| 1191 | buf->waiting = 0; |
| 1192 | buf->pending = 0; |
| 1193 | init_waitqueue_head(&buf->dma_wait); |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1194 | buf->file_priv = NULL; |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1195 | |
| 1196 | buf->dev_priv_size = dev->driver->dev_priv_size; |
| 1197 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
| 1198 | if (!buf->dev_private) { |
| 1199 | /* Set count correctly so we free the proper amount. */ |
| 1200 | entry->buf_count = count; |
| 1201 | drm_cleanup_buf_error(dev, entry); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1202 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1203 | atomic_dec(&dev->buf_alloc); |
| 1204 | return -ENOMEM; |
| 1205 | } |
| 1206 | memset(buf->dev_private, 0, buf->dev_priv_size); |
| 1207 | |
| 1208 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
| 1209 | |
| 1210 | offset += alignment; |
| 1211 | entry->buf_count++; |
| 1212 | byte_count += PAGE_SIZE << page_order; |
| 1213 | } |
| 1214 | |
| 1215 | DRM_DEBUG("byte_count: %d\n", byte_count); |
| 1216 | |
| 1217 | temp_buflist = drm_realloc(dma->buflist, |
| 1218 | dma->buf_count * sizeof(*dma->buflist), |
| 1219 | (dma->buf_count + entry->buf_count) |
| 1220 | * sizeof(*dma->buflist), DRM_MEM_BUFS); |
| 1221 | if (!temp_buflist) { |
| 1222 | /* Free the entry because it isn't valid */ |
| 1223 | drm_cleanup_buf_error(dev, entry); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1224 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1225 | atomic_dec(&dev->buf_alloc); |
| 1226 | return -ENOMEM; |
| 1227 | } |
| 1228 | dma->buflist = temp_buflist; |
| 1229 | |
| 1230 | for (i = 0; i < entry->buf_count; i++) { |
| 1231 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
| 1232 | } |
| 1233 | |
| 1234 | dma->buf_count += entry->buf_count; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 1235 | dma->seg_count += entry->seg_count; |
| 1236 | dma->page_count += byte_count >> PAGE_SHIFT; |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1237 | dma->byte_count += byte_count; |
| 1238 | |
| 1239 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
| 1240 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); |
| 1241 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1242 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1243 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1244 | request->count = entry->buf_count; |
| 1245 | request->size = size; |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1246 | |
| 1247 | dma->flags = _DRM_DMA_USE_FB; |
| 1248 | |
| 1249 | atomic_dec(&dev->buf_alloc); |
| 1250 | return 0; |
| 1251 | } |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 1252 | |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | /** |
| 1255 | * Add buffers for DMA transfers (ioctl). |
| 1256 | * |
| 1257 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1258 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | * \param cmd command. |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 1260 | * \param arg pointer to a struct drm_buf_desc request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | * \return zero on success or a negative number on failure. |
| 1262 | * |
| 1263 | * According with the memory type specified in drm_buf_desc::flags and the |
| 1264 | * build options, it dispatches the call either to addbufs_agp(), |
| 1265 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent |
| 1266 | * PCI memory respectively. |
| 1267 | */ |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1268 | int drm_addbufs(struct drm_device *dev, void *data, |
| 1269 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1271 | struct drm_buf_desc *request = data; |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1272 | int ret; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| 1275 | return -EINVAL; |
| 1276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | #if __OS_HAS_AGP |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1278 | if (request->flags & _DRM_AGP_BUFFER) |
| 1279 | ret = drm_addbufs_agp(dev, request); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | else |
| 1281 | #endif |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1282 | if (request->flags & _DRM_SG_BUFFER) |
| 1283 | ret = drm_addbufs_sg(dev, request); |
| 1284 | else if (request->flags & _DRM_FB_BUFFER) |
| 1285 | ret = drm_addbufs_fb(dev, request); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | else |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1287 | ret = drm_addbufs_pci(dev, request); |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1288 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1289 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | } |
| 1291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | /** |
| 1293 | * Get information about the buffer mappings. |
| 1294 | * |
| 1295 | * This was originally mean for debugging purposes, or by a sophisticated |
| 1296 | * client library to determine how best to use the available buffers (e.g., |
| 1297 | * large buffers can be used for image transfer). |
| 1298 | * |
| 1299 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1300 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | * \param cmd command. |
| 1302 | * \param arg pointer to a drm_buf_info structure. |
| 1303 | * \return zero on success or a negative number on failure. |
| 1304 | * |
| 1305 | * Increments drm_device::buf_use while holding the drm_device::count_lock |
| 1306 | * lock, preventing of allocating more buffers after this call. Information |
| 1307 | * about each requested buffer is then copied into user space. |
| 1308 | */ |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1309 | int drm_infobufs(struct drm_device *dev, void *data, |
| 1310 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1312 | struct drm_device_dma *dma = dev->dma; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1313 | struct drm_buf_info *request = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | int i; |
| 1315 | int count; |
| 1316 | |
| 1317 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| 1318 | return -EINVAL; |
| 1319 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1320 | if (!dma) |
| 1321 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1323 | spin_lock(&dev->count_lock); |
| 1324 | if (atomic_read(&dev->buf_alloc)) { |
| 1325 | spin_unlock(&dev->count_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | return -EBUSY; |
| 1327 | } |
| 1328 | ++dev->buf_use; /* Can't allocate more after this call */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1329 | spin_unlock(&dev->count_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1331 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
| 1332 | if (dma->bufs[i].buf_count) |
| 1333 | ++count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | } |
| 1335 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1336 | DRM_DEBUG("count = %d\n", count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1338 | if (request->count >= count) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1339 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
| 1340 | if (dma->bufs[i].buf_count) { |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 1341 | struct drm_buf_desc __user *to = |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1342 | &request->list[count]; |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1343 | struct drm_buf_entry *from = &dma->bufs[i]; |
| 1344 | struct drm_freelist *list = &dma->bufs[i].freelist; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1345 | if (copy_to_user(&to->count, |
| 1346 | &from->buf_count, |
| 1347 | sizeof(from->buf_count)) || |
| 1348 | copy_to_user(&to->size, |
| 1349 | &from->buf_size, |
| 1350 | sizeof(from->buf_size)) || |
| 1351 | copy_to_user(&to->low_mark, |
| 1352 | &list->low_mark, |
| 1353 | sizeof(list->low_mark)) || |
| 1354 | copy_to_user(&to->high_mark, |
| 1355 | &list->high_mark, |
| 1356 | sizeof(list->high_mark))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | return -EFAULT; |
| 1358 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1359 | DRM_DEBUG("%d %d %d %d %d\n", |
| 1360 | i, |
| 1361 | dma->bufs[i].buf_count, |
| 1362 | dma->bufs[i].buf_size, |
| 1363 | dma->bufs[i].freelist.low_mark, |
| 1364 | dma->bufs[i].freelist.high_mark); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | ++count; |
| 1366 | } |
| 1367 | } |
| 1368 | } |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1369 | request->count = count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | |
| 1371 | return 0; |
| 1372 | } |
| 1373 | |
| 1374 | /** |
| 1375 | * Specifies a low and high water mark for buffer allocation |
| 1376 | * |
| 1377 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1378 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | * \param cmd command. |
| 1380 | * \param arg a pointer to a drm_buf_desc structure. |
| 1381 | * \return zero on success or a negative number on failure. |
| 1382 | * |
| 1383 | * Verifies that the size order is bounded between the admissible orders and |
| 1384 | * updates the respective drm_device_dma::bufs entry low and high water mark. |
| 1385 | * |
| 1386 | * \note This ioctl is deprecated and mostly never used. |
| 1387 | */ |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1388 | int drm_markbufs(struct drm_device *dev, void *data, |
| 1389 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1391 | struct drm_device_dma *dma = dev->dma; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1392 | struct drm_buf_desc *request = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | int order; |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1394 | struct drm_buf_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | |
| 1396 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| 1397 | return -EINVAL; |
| 1398 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1399 | if (!dma) |
| 1400 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1402 | DRM_DEBUG("%d, %d, %d\n", |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1403 | request->size, request->low_mark, request->high_mark); |
| 1404 | order = drm_order(request->size); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1405 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
| 1406 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | entry = &dma->bufs[order]; |
| 1408 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1409 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | return -EINVAL; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1411 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | return -EINVAL; |
| 1413 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1414 | entry->freelist.low_mark = request->low_mark; |
| 1415 | entry->freelist.high_mark = request->high_mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | |
| 1417 | return 0; |
| 1418 | } |
| 1419 | |
| 1420 | /** |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1421 | * Unreserve the buffers in list, previously reserved using drmDMA. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | * |
| 1423 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1424 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | * \param cmd command. |
| 1426 | * \param arg pointer to a drm_buf_free structure. |
| 1427 | * \return zero on success or a negative number on failure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1428 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | * Calls free_buffer() for each used buffer. |
| 1430 | * This function is primarily used for debugging. |
| 1431 | */ |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1432 | int drm_freebufs(struct drm_device *dev, void *data, |
| 1433 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1435 | struct drm_device_dma *dma = dev->dma; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1436 | struct drm_buf_free *request = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | int i; |
| 1438 | int idx; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 1439 | struct drm_buf *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
| 1441 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| 1442 | return -EINVAL; |
| 1443 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1444 | if (!dma) |
| 1445 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 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))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | return -EFAULT; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1451 | if (idx < 0 || idx >= dma->buf_count) { |
| 1452 | DRM_ERROR("Index %d (of %d max)\n", |
| 1453 | idx, dma->buf_count - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | return -EINVAL; |
| 1455 | } |
| 1456 | buf = dma->buflist[idx]; |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1457 | if (buf->file_priv != file_priv) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1458 | DRM_ERROR("Process %d freeing buffer not owned\n", |
Pavel Emelyanov | ba25f9d | 2007-10-18 23:40:40 -0700 | [diff] [blame] | 1459 | task_pid_nr(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | return -EINVAL; |
| 1461 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1462 | drm_free_buffer(dev, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1472 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
George Sapountzis | 3417f33 | 2006-10-24 12:03:04 -0700 | [diff] [blame] | 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(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | */ |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1482 | int drm_mapbufs(struct drm_device *dev, void *data, |
| 1483 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1485 | struct drm_device_dma *dma = dev->dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | int retcode = 0; |
| 1487 | const int zero = 0; |
| 1488 | unsigned long virtual; |
| 1489 | unsigned long address; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1490 | struct drm_buf_map *request = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | int i; |
| 1492 | |
| 1493 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| 1494 | return -EINVAL; |
| 1495 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1496 | if (!dma) |
| 1497 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1499 | spin_lock(&dev->count_lock); |
| 1500 | if (atomic_read(&dev->buf_alloc)) { |
| 1501 | spin_unlock(&dev->count_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | return -EBUSY; |
| 1503 | } |
| 1504 | dev->buf_use++; /* Can't allocate more after this call */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1505 | spin_unlock(&dev->count_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1507 | if (request->count >= dma->buf_count) { |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1508 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1509 | || (drm_core_check_feature(dev, DRIVER_SG) |
Dave Airlie | b84397d6 | 2005-07-10 14:46:12 +1000 | [diff] [blame] | 1510 | && (dma->flags & _DRM_DMA_USE_SG)) |
| 1511 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) |
| 1512 | && (dma->flags & _DRM_DMA_USE_FB))) { |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 1513 | struct drm_map *map = dev->agp_buffer_map; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 1514 | unsigned long token = dev->agp_buffer_token; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1515 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1516 | if (!map) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | retcode = -EINVAL; |
| 1518 | goto done; |
| 1519 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1520 | down_write(¤t->mm->mmap_sem); |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1521 | virtual = do_mmap(file_priv->filp, 0, map->size, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1522 | PROT_READ | PROT_WRITE, |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1523 | MAP_SHARED, |
| 1524 | token); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1525 | up_write(¤t->mm->mmap_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | } else { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1527 | down_write(¤t->mm->mmap_sem); |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1528 | virtual = do_mmap(file_priv->filp, 0, dma->byte_count, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1529 | PROT_READ | PROT_WRITE, |
| 1530 | MAP_SHARED, 0); |
| 1531 | up_write(¤t->mm->mmap_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1533 | if (virtual > -1024UL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | /* Real error */ |
| 1535 | retcode = (signed long)virtual; |
| 1536 | goto done; |
| 1537 | } |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1538 | request->virtual = (void __user *)virtual; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1540 | for (i = 0; i < dma->buf_count; i++) { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1541 | if (copy_to_user(&request->list[i].idx, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1542 | &dma->buflist[i]->idx, |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1543 | sizeof(request->list[0].idx))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | retcode = -EFAULT; |
| 1545 | goto done; |
| 1546 | } |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1547 | if (copy_to_user(&request->list[i].total, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1548 | &dma->buflist[i]->total, |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1549 | sizeof(request->list[0].total))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | retcode = -EFAULT; |
| 1551 | goto done; |
| 1552 | } |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1553 | if (copy_to_user(&request->list[i].used, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1554 | &zero, sizeof(zero))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | retcode = -EFAULT; |
| 1556 | goto done; |
| 1557 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1558 | address = virtual + dma->buflist[i]->offset; /* *** */ |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1559 | if (copy_to_user(&request->list[i].address, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1560 | &address, sizeof(address))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | retcode = -EFAULT; |
| 1562 | goto done; |
| 1563 | } |
| 1564 | } |
| 1565 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1566 | done: |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1567 | request->count = dma->buf_count; |
| 1568 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | |
| 1570 | return retcode; |
| 1571 | } |
| 1572 | |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 1573 | /** |
| 1574 | * Compute size order. Returns the exponent of the smaller power of two which |
| 1575 | * is greater or equal to given number. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1576 | * |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 1577 | * \param size size. |
| 1578 | * \return order. |
| 1579 | * |
| 1580 | * \todo Can be made faster. |
| 1581 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1582 | int drm_order(unsigned long size) |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 1583 | { |
| 1584 | int order; |
| 1585 | unsigned long tmp; |
| 1586 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1587 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 1588 | |
| 1589 | if (size & (size - 1)) |
| 1590 | ++order; |
| 1591 | |
| 1592 | return order; |
| 1593 | } |
| 1594 | EXPORT_SYMBOL(drm_order); |