Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 2 | * Legacy: Generic DRM Buffer Management |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. |
| 5 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| 6 | * All Rights Reserved. |
| 7 | * |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 8 | * Author: Rickard E. (Rik) Faith <faith@valinux.com> |
| 9 | * Author: Gareth Hughes <gareth@valinux.com> |
| 10 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 12 | * copy of this software and associated documentation files (the "Software"), |
| 13 | * to deal in the Software without restriction, including without limitation |
| 14 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 15 | * and/or sell copies of the Software, and to permit persons to whom the |
| 16 | * Software is furnished to do so, subject to the following conditions: |
| 17 | * |
| 18 | * The above copyright notice and this permission notice (including the next |
| 19 | * paragraph) shall be included in all copies or substantial portions of the |
| 20 | * Software. |
| 21 | * |
| 22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 25 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 26 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 27 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 28 | * OTHER DEALINGS IN THE SOFTWARE. |
| 29 | */ |
| 30 | |
Paul Gortmaker | 2d1a8a4 | 2011-08-30 18:16:33 -0400 | [diff] [blame] | 31 | #include <linux/export.h> |
Sam Ravnborg | 0500c04 | 2019-05-26 19:35:35 +0200 | [diff] [blame] | 32 | #include <linux/log2.h> |
| 33 | #include <linux/mm.h> |
| 34 | #include <linux/mman.h> |
| 35 | #include <linux/nospec.h> |
Daniel Vetter | 625c18d | 2020-04-03 13:06:10 +0200 | [diff] [blame] | 36 | #include <linux/pci.h> |
Sam Ravnborg | 0500c04 | 2019-05-26 19:35:35 +0200 | [diff] [blame] | 37 | #include <linux/slab.h> |
| 38 | #include <linux/uaccess.h> |
| 39 | #include <linux/vmalloc.h> |
| 40 | |
David Miller | f1a2a9b | 2009-02-18 15:41:02 -0800 | [diff] [blame] | 41 | #include <asm/shmparam.h> |
Sam Ravnborg | 0500c04 | 2019-05-26 19:35:35 +0200 | [diff] [blame] | 42 | |
| 43 | #include <drm/drm_agpsupport.h> |
| 44 | #include <drm/drm_device.h> |
| 45 | #include <drm/drm_drv.h> |
| 46 | #include <drm/drm_file.h> |
Sam Ravnborg | 0500c04 | 2019-05-26 19:35:35 +0200 | [diff] [blame] | 47 | #include <drm/drm_print.h> |
| 48 | |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 49 | #include "drm_legacy.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Gustavo A. R. Silva | a378050 | 2018-10-16 11:55:49 +0200 | [diff] [blame] | 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, |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 53 | struct drm_local_map *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; |
Suraj Upadhyay | 948de842 | 2020-07-02 18:53:32 +0530 | [diff] [blame] | 56 | |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 57 | list_for_each_entry(entry, &dev->maplist, head) { |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 58 | /* |
| 59 | * Because the kernel-userspace ABI is fixed at a 32-bit offset |
Tormod Volden | 66aa696 | 2011-05-30 19:45:43 +0000 | [diff] [blame] | 60 | * while PCI resources may live above that, we only compare the |
| 61 | * lower 32 bits of the map offset for maps of type |
| 62 | * _DRM_FRAMEBUFFER or _DRM_REGISTERS. |
| 63 | * It is assumed that if a driver have more than one resource |
| 64 | * of each type, the lower 32 bits are different. |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 65 | */ |
| 66 | if (!entry->map || |
| 67 | map->type != entry->map->type || |
Daniel Vetter | 95c081c | 2016-06-21 10:54:12 +0200 | [diff] [blame] | 68 | entry->master != dev->master) |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 69 | continue; |
| 70 | switch (map->type) { |
| 71 | case _DRM_SHM: |
| 72 | if (map->flags != _DRM_CONTAINS_LOCK) |
| 73 | break; |
Tormod Volden | 66aa696 | 2011-05-30 19:45:43 +0000 | [diff] [blame] | 74 | return entry; |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 75 | case _DRM_REGISTERS: |
| 76 | case _DRM_FRAME_BUFFER: |
Tormod Volden | 66aa696 | 2011-05-30 19:45:43 +0000 | [diff] [blame] | 77 | if ((entry->map->offset & 0xffffffff) == |
| 78 | (map->offset & 0xffffffff)) |
| 79 | return entry; |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 80 | default: /* Make gcc happy */ |
| 81 | ; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 82 | } |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 83 | if (entry->map->offset == map->offset) |
| 84 | return entry; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | return NULL; |
| 88 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Dave Airlie | e0be428 | 2007-07-12 10:26:44 +1000 | [diff] [blame] | 90 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
David Miller | f1a2a9b | 2009-02-18 15:41:02 -0800 | [diff] [blame] | 91 | unsigned long user_token, int hashed_handle, int shm) |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 92 | { |
David Miller | f1a2a9b | 2009-02-18 15:41:02 -0800 | [diff] [blame] | 93 | int use_hashed_handle, shift; |
| 94 | unsigned long add; |
| 95 | |
Dave Airlie | c2604ce | 2006-08-12 16:03:26 +1000 | [diff] [blame] | 96 | #if (BITS_PER_LONG == 64) |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 97 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
| 98 | #elif (BITS_PER_LONG == 32) |
| 99 | use_hashed_handle = hashed_handle; |
| 100 | #else |
| 101 | #error Unsupported long size. Neither 64 nor 32 bits. |
| 102 | #endif |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 103 | |
Thomas Hellstrom | e08870c | 2006-09-22 04:18:37 +1000 | [diff] [blame] | 104 | if (!use_hashed_handle) { |
| 105 | int ret; |
Suraj Upadhyay | 948de842 | 2020-07-02 18:53:32 +0530 | [diff] [blame] | 106 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 107 | hash->key = user_token >> PAGE_SHIFT; |
Thomas Hellstrom | e08870c | 2006-09-22 04:18:37 +1000 | [diff] [blame] | 108 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
| 109 | if (ret != -EINVAL) |
| 110 | return ret; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 111 | } |
David Miller | f1a2a9b | 2009-02-18 15:41:02 -0800 | [diff] [blame] | 112 | |
| 113 | shift = 0; |
| 114 | add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT; |
| 115 | if (shm && (SHMLBA > PAGE_SIZE)) { |
| 116 | int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1; |
| 117 | |
| 118 | /* For shared memory, we have to preserve the SHMLBA |
| 119 | * bits of the eventual vma->vm_pgoff value during |
| 120 | * mmap(). Otherwise we run into cache aliasing problems |
| 121 | * on some platforms. On these platforms, the pgoff of |
| 122 | * a mmap() request is used to pick a suitable virtual |
| 123 | * address for the mmap() region such that it will not |
| 124 | * cause cache aliasing problems. |
| 125 | * |
| 126 | * Therefore, make sure the SHMLBA relevant bits of the |
| 127 | * hash value we use are equal to those in the original |
| 128 | * kernel virtual address. |
| 129 | */ |
| 130 | shift = bits; |
| 131 | add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL)); |
| 132 | } |
| 133 | |
Thomas Hellstrom | e08870c | 2006-09-22 04:18:37 +1000 | [diff] [blame] | 134 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
| 135 | user_token, 32 - PAGE_SHIFT - 3, |
David Miller | f1a2a9b | 2009-02-18 15:41:02 -0800 | [diff] [blame] | 136 | shift, add); |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 137 | } |
Dave Airlie | 9a18664 | 2005-06-23 21:29:18 +1000 | [diff] [blame] | 138 | |
Benjamin Gaignard | abee549 | 2020-03-06 11:29:36 +0100 | [diff] [blame] | 139 | /* |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 140 | * Core function to create a range of memory available for mapping by a |
| 141 | * non-root process. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | * |
| 143 | * Adjusts the memory offset to its absolute value according to the mapping |
| 144 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where |
| 145 | * applicable and if supported by the kernel. |
| 146 | */ |
Paul McQuade | 2bcfcbf | 2018-03-19 00:52:22 +0000 | [diff] [blame] | 147 | static int drm_addmap_core(struct drm_device *dev, resource_size_t offset, |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 148 | unsigned int size, enum drm_map_type type, |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 149 | enum drm_map_flags flags, |
Paul McQuade | 2bcfcbf | 2018-03-19 00:52:22 +0000 | [diff] [blame] | 150 | struct drm_map_list **maplist) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | { |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 152 | struct drm_local_map *map; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 153 | struct drm_map_list *list; |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 154 | unsigned long user_token; |
| 155 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 157 | map = kmalloc(sizeof(*map), GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 158 | if (!map) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | return -ENOMEM; |
| 160 | |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 161 | map->offset = offset; |
| 162 | map->size = size; |
| 163 | map->flags = flags; |
| 164 | map->type = type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
| 166 | /* Only allow shared memory to be removable since we only keep enough |
| 167 | * book keeping information about shared memory to allow for removal |
| 168 | * when processes fork. |
| 169 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 170 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 171 | kfree(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | return -EINVAL; |
| 173 | } |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 174 | DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n", |
| 175 | (unsigned long long)map->offset, map->size, map->type); |
Benjamin Herrenschmidt | b674137 | 2009-05-18 11:56:16 +1000 | [diff] [blame] | 176 | |
| 177 | /* page-align _DRM_SHM maps. They are allocated here so there is no security |
| 178 | * hole created by that and it works around various broken drivers that use |
| 179 | * a non-aligned quantity to map the SAREA. --BenH |
| 180 | */ |
| 181 | if (map->type == _DRM_SHM) |
| 182 | map->size = PAGE_ALIGN(map->size); |
| 183 | |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 184 | if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 185 | kfree(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | return -EINVAL; |
| 187 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 188 | map->mtrr = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | map->handle = NULL; |
| 190 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 191 | switch (map->type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | case _DRM_REGISTERS: |
| 193 | case _DRM_FRAME_BUFFER: |
Jordan Crouse | 4b7fb9b | 2010-05-27 13:40:26 -0600 | [diff] [blame] | 194 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__arm__) |
Dave Airlie | 8d2ea62 | 2006-01-11 20:48:09 +1100 | [diff] [blame] | 195 | if (map->offset + (map->size-1) < map->offset || |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 196 | map->offset < virt_to_phys(high_memory)) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 197 | kfree(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | return -EINVAL; |
| 199 | } |
| 200 | #endif |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 201 | /* Some drivers preinitialize some maps, without the X Server |
| 202 | * needing to be aware of it. Therefore, we just return success |
| 203 | * when the server tries to create a duplicate map. |
| 204 | */ |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 205 | list = drm_find_matching_map(dev, map); |
| 206 | if (list != NULL) { |
| 207 | if (list->map->size != map->size) { |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 208 | DRM_DEBUG("Matching maps of type %d with " |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 209 | "mismatched sizes, (%ld vs %ld)\n", |
| 210 | map->type, map->size, |
| 211 | list->map->size); |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 212 | list->map->size = map->size; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 213 | } |
| 214 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 215 | kfree(map); |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 216 | *maplist = list; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 217 | return 0; |
| 218 | } |
| 219 | |
Daniel Vetter | 2818564 | 2013-08-08 15:41:27 +0200 | [diff] [blame] | 220 | if (map->type == _DRM_FRAME_BUFFER || |
| 221 | (map->flags & _DRM_WRITE_COMBINING)) { |
| 222 | map->mtrr = |
| 223 | arch_phys_wc_add(map->offset, map->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | } |
Scott Thompson | 0769d39 | 2007-08-25 18:17:49 +1000 | [diff] [blame] | 225 | if (map->type == _DRM_REGISTERS) { |
Andy Lutomirski | ff47eaf | 2013-05-13 23:58:42 +0000 | [diff] [blame] | 226 | if (map->flags & _DRM_WRITE_COMBINING) |
| 227 | map->handle = ioremap_wc(map->offset, |
| 228 | map->size); |
| 229 | else |
| 230 | map->handle = ioremap(map->offset, map->size); |
Scott Thompson | 0769d39 | 2007-08-25 18:17:49 +1000 | [diff] [blame] | 231 | if (!map->handle) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 232 | kfree(map); |
Scott Thompson | 0769d39 | 2007-08-25 18:17:49 +1000 | [diff] [blame] | 233 | return -ENOMEM; |
| 234 | } |
| 235 | } |
Dave Airlie | bc5f452 | 2007-11-05 12:50:58 +1000 | [diff] [blame] | 236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | case _DRM_SHM: |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 239 | list = drm_find_matching_map(dev, map); |
| 240 | if (list != NULL) { |
Paul McQuade | 2bcfcbf | 2018-03-19 00:52:22 +0000 | [diff] [blame] | 241 | if (list->map->size != map->size) { |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 242 | DRM_DEBUG("Matching maps of type %d with " |
| 243 | "mismatched sizes, (%ld vs %ld)\n", |
| 244 | map->type, map->size, list->map->size); |
| 245 | list->map->size = map->size; |
| 246 | } |
| 247 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 248 | kfree(map); |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 249 | *maplist = list; |
| 250 | return 0; |
| 251 | } |
Thomas Hellstrom | f239b7b | 2007-01-08 21:22:50 +1100 | [diff] [blame] | 252 | map->handle = vmalloc_user(map->size); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 253 | DRM_DEBUG("%lu %d %p\n", |
Daniel Vetter | 04420c9 | 2013-07-10 14:11:57 +0200 | [diff] [blame] | 254 | map->size, order_base_2(map->size), map->handle); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 255 | if (!map->handle) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 256 | kfree(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | return -ENOMEM; |
| 258 | } |
| 259 | map->offset = (unsigned long)map->handle; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 260 | if (map->flags & _DRM_CONTAINS_LOCK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
Daniel Vetter | 95c081c | 2016-06-21 10:54:12 +0200 | [diff] [blame] | 262 | if (dev->master->lock.hw_lock != NULL) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 263 | vfree(map->handle); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 264 | kfree(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | return -EBUSY; |
| 266 | } |
Daniel Vetter | 95c081c | 2016-06-21 10:54:12 +0200 | [diff] [blame] | 267 | dev->sigdata.lock = dev->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | } |
| 269 | break; |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 270 | case _DRM_AGP: { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 271 | struct drm_agp_mem *entry; |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 272 | int valid = 0; |
| 273 | |
Daniel Vetter | d990675 | 2013-12-11 11:34:35 +0100 | [diff] [blame] | 274 | if (!dev->agp) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 275 | kfree(map); |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 276 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | } |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 278 | #ifdef __alpha__ |
| 279 | map->offset += dev->hose->mem_space->start; |
| 280 | #endif |
Eric Anholt | 47a184a | 2007-11-22 16:55:15 +1000 | [diff] [blame] | 281 | /* In some cases (i810 driver), user space may have already |
| 282 | * added the AGP base itself, because dev->agp->base previously |
| 283 | * only got set during AGP enable. So, only add the base |
| 284 | * address if the map's offset isn't already within the |
| 285 | * aperture. |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 286 | */ |
Eric Anholt | 47a184a | 2007-11-22 16:55:15 +1000 | [diff] [blame] | 287 | if (map->offset < dev->agp->base || |
| 288 | map->offset > dev->agp->base + |
| 289 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { |
| 290 | map->offset += dev->agp->base; |
| 291 | } |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 292 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
| 293 | |
| 294 | /* This assumes the DRM is in total control of AGP space. |
| 295 | * It's not always the case as AGP can be in the control |
| 296 | * of user space (i.e. i810 driver). So this loop will get |
| 297 | * skipped and we double check that dev->agp->memory is |
| 298 | * actually set as well as being invalid before EPERM'ing |
| 299 | */ |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 300 | list_for_each_entry(entry, &dev->agp->memory, head) { |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 301 | if ((map->offset >= entry->bound) && |
| 302 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { |
| 303 | valid = 1; |
| 304 | break; |
| 305 | } |
| 306 | } |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 307 | if (!list_empty(&dev->agp->memory) && !valid) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 308 | kfree(map); |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 309 | return -EPERM; |
| 310 | } |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 311 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
| 312 | (unsigned long long)map->offset, map->size); |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | break; |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 315 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | case _DRM_SCATTER_GATHER: |
| 317 | if (!dev->sg) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 318 | kfree(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | return -EINVAL; |
| 320 | } |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 321 | map->offset += (unsigned long)dev->sg->virtual; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | break; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 323 | case _DRM_CONSISTENT: |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 324 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 325 | * As we're limiting the address to 2^32-1 (or less), |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 326 | * casting it down to 32 bits is no problem, but we |
| 327 | * need to point to a 64bit variable first. */ |
Chris Wilson | 8e4ff9b | 2020-02-02 17:16:32 +0000 | [diff] [blame] | 328 | map->handle = dma_alloc_coherent(&dev->pdev->dev, |
| 329 | map->size, |
| 330 | &map->offset, |
| 331 | GFP_KERNEL); |
| 332 | if (!map->handle) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 333 | kfree(map); |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 334 | return -ENOMEM; |
| 335 | } |
| 336 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | default: |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 338 | kfree(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | return -EINVAL; |
| 340 | } |
| 341 | |
Davidlohr Bueso | 94e3370 | 2010-08-11 09:18:52 -0400 | [diff] [blame] | 342 | list = kzalloc(sizeof(*list), GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 343 | if (!list) { |
Amol Lad | 85abb3f | 2006-10-25 09:55:34 -0700 | [diff] [blame] | 344 | if (map->type == _DRM_REGISTERS) |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 345 | iounmap(map->handle); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 346 | kfree(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | return -EINVAL; |
| 348 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | list->map = map; |
| 350 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 351 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 352 | list_add(&list->head, &dev->maplist); |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 353 | |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 354 | /* Assign a 32-bit handle */ |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 355 | /* We do it here so that dev->struct_mutex protects the increment */ |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 356 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
| 357 | map->offset; |
David Miller | f1a2a9b | 2009-02-18 15:41:02 -0800 | [diff] [blame] | 358 | ret = drm_map_handle(dev, &list->hash, user_token, 0, |
| 359 | (map->type == _DRM_SHM)); |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 360 | if (ret) { |
Amol Lad | 85abb3f | 2006-10-25 09:55:34 -0700 | [diff] [blame] | 361 | if (map->type == _DRM_REGISTERS) |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 362 | iounmap(map->handle); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 363 | kfree(map); |
| 364 | kfree(list); |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 365 | mutex_unlock(&dev->struct_mutex); |
| 366 | return ret; |
| 367 | } |
| 368 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 369 | list->user_token = list->hash.key << PAGE_SHIFT; |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 370 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
Ben Skeggs | 2ff2e8a3 | 2009-05-26 10:35:52 +1000 | [diff] [blame] | 372 | if (!(map->flags & _DRM_DRIVER)) |
Daniel Vetter | 95c081c | 2016-06-21 10:54:12 +0200 | [diff] [blame] | 373 | list->master = dev->master; |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 374 | *maplist = list; |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 375 | return 0; |
Thierry Reding | afe0f69 | 2014-04-29 11:44:38 +0200 | [diff] [blame] | 376 | } |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 377 | |
Paul McQuade | 2bcfcbf | 2018-03-19 00:52:22 +0000 | [diff] [blame] | 378 | int drm_legacy_addmap(struct drm_device *dev, resource_size_t offset, |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 379 | unsigned int size, enum drm_map_type type, |
| 380 | enum drm_map_flags flags, struct drm_local_map **map_ptr) |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 381 | { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 382 | struct drm_map_list *list; |
Dave Airlie | 89625eb | 2005-09-05 21:23:23 +1000 | [diff] [blame] | 383 | int rc; |
| 384 | |
| 385 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); |
| 386 | if (!rc) |
| 387 | *map_ptr = list->map; |
| 388 | return rc; |
| 389 | } |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 390 | EXPORT_SYMBOL(drm_legacy_addmap); |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 391 | |
Jani Nikula | c764268 | 2018-12-28 15:04:46 +0200 | [diff] [blame] | 392 | struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, |
| 393 | unsigned int token) |
| 394 | { |
| 395 | struct drm_map_list *_entry; |
Suraj Upadhyay | 948de842 | 2020-07-02 18:53:32 +0530 | [diff] [blame] | 396 | |
Jani Nikula | c764268 | 2018-12-28 15:04:46 +0200 | [diff] [blame] | 397 | list_for_each_entry(_entry, &dev->maplist, head) |
| 398 | if (_entry->user_token == token) |
| 399 | return _entry->map; |
| 400 | return NULL; |
| 401 | } |
| 402 | EXPORT_SYMBOL(drm_legacy_findmap); |
| 403 | |
Benjamin Gaignard | abee549 | 2020-03-06 11:29:36 +0100 | [diff] [blame] | 404 | /* |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 405 | * Ioctl to specify a range of memory that is available for mapping by a |
| 406 | * non-root process. |
| 407 | * |
| 408 | * \param inode device inode. |
| 409 | * \param file_priv DRM file private. |
| 410 | * \param cmd command. |
| 411 | * \param arg pointer to a drm_map structure. |
| 412 | * \return zero on success or a negative value on error. |
| 413 | * |
| 414 | */ |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 415 | int drm_legacy_addmap_ioctl(struct drm_device *dev, void *data, |
| 416 | struct drm_file *file_priv) |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 417 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 418 | struct drm_map *map = data; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 419 | struct drm_map_list *maplist; |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 420 | int err; |
| 421 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 422 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 423 | return -EPERM; |
| 424 | |
Daniel Vetter | e975eef | 2016-04-26 19:29:37 +0200 | [diff] [blame] | 425 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 426 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 427 | return -EOPNOTSUPP; |
Daniel Vetter | e975eef | 2016-04-26 19:29:37 +0200 | [diff] [blame] | 428 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 429 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
| 430 | map->flags, &maplist); |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 431 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 432 | if (err) |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 433 | return err; |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 434 | |
Dave Airlie | 67e1a01 | 2005-10-24 18:41:39 +1000 | [diff] [blame] | 435 | /* 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] | 436 | map->handle = (void *)(unsigned long)maplist->user_token; |
Andy Lutomirski | 0dd99f1 | 2013-05-13 23:58:48 +0000 | [diff] [blame] | 437 | |
| 438 | /* |
| 439 | * It appears that there are no users of this value whatsoever -- |
| 440 | * drmAddMap just discards it. Let's not encourage its use. |
| 441 | * (Keeping drm_addmap_core's returned mtrr value would be wrong -- |
| 442 | * it's not a real mtrr index anymore.) |
| 443 | */ |
| 444 | map->mtrr = -1; |
| 445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | return 0; |
Dave Airlie | 88f399c | 2005-08-20 17:43:33 +1000 | [diff] [blame] | 447 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | |
Daniel Vetter | ec1f52e | 2016-04-26 19:29:36 +0200 | [diff] [blame] | 449 | /* |
| 450 | * Get a mapping information. |
| 451 | * |
| 452 | * \param inode device inode. |
| 453 | * \param file_priv DRM file private. |
| 454 | * \param cmd command. |
| 455 | * \param arg user argument, pointing to a drm_map structure. |
| 456 | * |
| 457 | * \return zero on success or a negative number on failure. |
| 458 | * |
| 459 | * Searches for the mapping with the specified offset and copies its information |
| 460 | * into userspace |
| 461 | */ |
| 462 | int drm_legacy_getmap_ioctl(struct drm_device *dev, void *data, |
| 463 | struct drm_file *file_priv) |
| 464 | { |
| 465 | struct drm_map *map = data; |
| 466 | struct drm_map_list *r_list = NULL; |
| 467 | struct list_head *list; |
| 468 | int idx; |
| 469 | int i; |
| 470 | |
Daniel Vetter | e975eef | 2016-04-26 19:29:37 +0200 | [diff] [blame] | 471 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 472 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 473 | return -EOPNOTSUPP; |
Daniel Vetter | e975eef | 2016-04-26 19:29:37 +0200 | [diff] [blame] | 474 | |
Daniel Vetter | ec1f52e | 2016-04-26 19:29:36 +0200 | [diff] [blame] | 475 | idx = map->offset; |
| 476 | if (idx < 0) |
| 477 | return -EINVAL; |
| 478 | |
| 479 | i = 0; |
| 480 | mutex_lock(&dev->struct_mutex); |
| 481 | list_for_each(list, &dev->maplist) { |
| 482 | if (i == idx) { |
| 483 | r_list = list_entry(list, struct drm_map_list, head); |
| 484 | break; |
| 485 | } |
| 486 | i++; |
| 487 | } |
| 488 | if (!r_list || !r_list->map) { |
| 489 | mutex_unlock(&dev->struct_mutex); |
| 490 | return -EINVAL; |
| 491 | } |
| 492 | |
| 493 | map->offset = r_list->map->offset; |
| 494 | map->size = r_list->map->size; |
| 495 | map->type = r_list->map->type; |
| 496 | map->flags = r_list->map->flags; |
| 497 | map->handle = (void *)(unsigned long) r_list->user_token; |
| 498 | map->mtrr = arch_phys_wc_index(r_list->map->mtrr); |
| 499 | |
| 500 | mutex_unlock(&dev->struct_mutex); |
| 501 | |
| 502 | return 0; |
| 503 | } |
| 504 | |
Benjamin Gaignard | abee549 | 2020-03-06 11:29:36 +0100 | [diff] [blame] | 505 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | * Remove a map private from list and deallocate resources if the mapping |
| 507 | * isn't in use. |
| 508 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | * Searches the map on drm_device::maplist, removes it from the list, see if |
Matt Roper | 1e55a53 | 2019-02-01 17:23:26 -0800 | [diff] [blame] | 510 | * it's being used, and free any associated resource (such as MTRR's) if it's not |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | * being on use. |
| 512 | * |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 513 | * \sa drm_legacy_addmap |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | */ |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 515 | int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 517 | struct drm_map_list *r_list = NULL, *list_t; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 518 | int found = 0; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 519 | struct drm_master *master; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 521 | /* Find the list entry for the map and remove it */ |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 522 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 523 | if (r_list->map == map) { |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 524 | master = r_list->master; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 525 | list_del(&r_list->head); |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 526 | drm_ht_remove_key(&dev->map_hash, |
| 527 | r_list->user_token >> PAGE_SHIFT); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 528 | kfree(r_list); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 529 | found = 1; |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 530 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | } |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 533 | |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 534 | if (!found) |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 535 | return -EINVAL; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 536 | |
| 537 | switch (map->type) { |
| 538 | case _DRM_REGISTERS: |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 539 | iounmap(map->handle); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 540 | /* FALLTHROUGH */ |
| 541 | case _DRM_FRAME_BUFFER: |
Daniel Vetter | 2818564 | 2013-08-08 15:41:27 +0200 | [diff] [blame] | 542 | arch_phys_wc_del(map->mtrr); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 543 | break; |
| 544 | case _DRM_SHM: |
| 545 | vfree(map->handle); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 546 | if (master) { |
| 547 | if (dev->sigdata.lock == master->lock.hw_lock) |
| 548 | dev->sigdata.lock = NULL; |
| 549 | master->lock.hw_lock = NULL; /* SHM removed */ |
| 550 | master->lock.file_priv = NULL; |
Thomas Hellstrom | 171901d | 2009-03-02 11:10:55 +0100 | [diff] [blame] | 551 | wake_up_interruptible_all(&master->lock.lock_queue); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 552 | } |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 553 | break; |
| 554 | case _DRM_AGP: |
| 555 | case _DRM_SCATTER_GATHER: |
| 556 | break; |
| 557 | case _DRM_CONSISTENT: |
Chris Wilson | 8e4ff9b | 2020-02-02 17:16:32 +0000 | [diff] [blame] | 558 | dma_free_coherent(&dev->pdev->dev, |
| 559 | map->size, |
| 560 | map->handle, |
| 561 | map->offset); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 562 | break; |
| 563 | } |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 564 | kfree(map); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | return 0; |
| 567 | } |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 568 | EXPORT_SYMBOL(drm_legacy_rmmap_locked); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 569 | |
Daniel Vetter | 40647e4 | 2016-04-27 09:20:18 +0200 | [diff] [blame] | 570 | void drm_legacy_rmmap(struct drm_device *dev, struct drm_local_map *map) |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 571 | { |
Daniel Vetter | 40647e4 | 2016-04-27 09:20:18 +0200 | [diff] [blame] | 572 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 573 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
Daniel Vetter | 40647e4 | 2016-04-27 09:20:18 +0200 | [diff] [blame] | 574 | return; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 575 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 576 | mutex_lock(&dev->struct_mutex); |
Daniel Vetter | 40647e4 | 2016-04-27 09:20:18 +0200 | [diff] [blame] | 577 | drm_legacy_rmmap_locked(dev, map); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 578 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 579 | } |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 580 | EXPORT_SYMBOL(drm_legacy_rmmap); |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 581 | |
Daniel Vetter | 40647e4 | 2016-04-27 09:20:18 +0200 | [diff] [blame] | 582 | void drm_legacy_master_rmmaps(struct drm_device *dev, struct drm_master *master) |
| 583 | { |
| 584 | struct drm_map_list *r_list, *list_temp; |
| 585 | |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 586 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
Daniel Vetter | 40647e4 | 2016-04-27 09:20:18 +0200 | [diff] [blame] | 587 | return; |
| 588 | |
| 589 | mutex_lock(&dev->struct_mutex); |
| 590 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
| 591 | if (r_list->master == master) { |
| 592 | drm_legacy_rmmap_locked(dev, r_list->map); |
| 593 | r_list = NULL; |
| 594 | } |
| 595 | } |
| 596 | mutex_unlock(&dev->struct_mutex); |
| 597 | } |
| 598 | |
Dave Airlie | 35a2802 | 2019-04-23 08:45:12 +1000 | [diff] [blame] | 599 | void drm_legacy_rmmaps(struct drm_device *dev) |
| 600 | { |
| 601 | struct drm_map_list *r_list, *list_temp; |
| 602 | |
| 603 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) |
| 604 | drm_legacy_rmmap(dev, r_list->map); |
| 605 | } |
| 606 | |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 607 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
| 608 | * the last close of the device, and this is necessary for cleanup when things |
| 609 | * exit uncleanly. Therefore, having userland manually remove mappings seems |
| 610 | * like a pointless exercise since they're going away anyway. |
| 611 | * |
| 612 | * One use case might be after addmap is allowed for normal users for SHM and |
| 613 | * gets used by drivers that the server doesn't need to care about. This seems |
| 614 | * unlikely. |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 615 | * |
| 616 | * \param inode device inode. |
| 617 | * \param file_priv DRM file private. |
| 618 | * \param cmd command. |
| 619 | * \param arg pointer to a struct drm_map structure. |
| 620 | * \return zero on success or a negative value on error. |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 621 | */ |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 622 | int drm_legacy_rmmap_ioctl(struct drm_device *dev, void *data, |
| 623 | struct drm_file *file_priv) |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 624 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 625 | struct drm_map *request = data; |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 626 | struct drm_local_map *map = NULL; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 627 | struct drm_map_list *r_list; |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 628 | int ret; |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 629 | |
Daniel Vetter | e975eef | 2016-04-26 19:29:37 +0200 | [diff] [blame] | 630 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 631 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 632 | return -EOPNOTSUPP; |
Daniel Vetter | e975eef | 2016-04-26 19:29:37 +0200 | [diff] [blame] | 633 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 634 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 635 | list_for_each_entry(r_list, &dev->maplist, head) { |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 636 | if (r_list->map && |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 637 | r_list->user_token == (unsigned long)request->handle && |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 638 | r_list->map->flags & _DRM_REMOVABLE) { |
| 639 | map = r_list->map; |
| 640 | break; |
| 641 | } |
| 642 | } |
| 643 | |
Matt Roper | 1e55a53 | 2019-02-01 17:23:26 -0800 | [diff] [blame] | 644 | /* List has wrapped around to the head pointer, or it's empty we didn't |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 645 | * find anything. |
| 646 | */ |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 647 | if (list_empty(&dev->maplist) || !map) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 648 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 649 | return -EINVAL; |
| 650 | } |
| 651 | |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 652 | /* Register and framebuffer maps are permanent */ |
| 653 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 654 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 655 | return 0; |
| 656 | } |
| 657 | |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 658 | ret = drm_legacy_rmmap_locked(dev, map); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 659 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 660 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 661 | |
| 662 | return ret; |
Dave Airlie | 7ab9840 | 2005-07-10 16:56:52 +1000 | [diff] [blame] | 663 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | |
Benjamin Gaignard | abee549 | 2020-03-06 11:29:36 +0100 | [diff] [blame] | 665 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | * Cleanup after an error on one of the addbufs() functions. |
| 667 | * |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 668 | * \param dev DRM device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | * \param entry buffer entry where the error occurred. |
| 670 | * |
| 671 | * Frees any pages and buffers associated with the given entry. |
| 672 | */ |
Paul McQuade | 2bcfcbf | 2018-03-19 00:52:22 +0000 | [diff] [blame] | 673 | static void drm_cleanup_buf_error(struct drm_device *dev, |
| 674 | struct drm_buf_entry *entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | { |
| 676 | int i; |
| 677 | |
| 678 | if (entry->seg_count) { |
| 679 | for (i = 0; i < entry->seg_count; i++) { |
| 680 | if (entry->seglist[i]) { |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 681 | drm_pci_free(dev, entry->seglist[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | } |
| 683 | } |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 684 | kfree(entry->seglist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | |
| 686 | entry->seg_count = 0; |
| 687 | } |
| 688 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 689 | if (entry->buf_count) { |
| 690 | for (i = 0; i < entry->buf_count; i++) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 691 | kfree(entry->buflist[i].dev_private); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | } |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 693 | kfree(entry->buflist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
| 695 | entry->buf_count = 0; |
| 696 | } |
| 697 | } |
| 698 | |
Daniel Vetter | a7fb8a2 | 2015-09-09 16:45:52 +0200 | [diff] [blame] | 699 | #if IS_ENABLED(CONFIG_AGP) |
Benjamin Gaignard | abee549 | 2020-03-06 11:29:36 +0100 | [diff] [blame] | 700 | /* |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 701 | * Add AGP buffers for DMA transfers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | * |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 703 | * \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] | 704 | * \param request pointer to a struct drm_buf_desc describing the request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | * \return zero on success or a negative number on failure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 706 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | * After some sanity checks creates a drm_buf structure for each buffer and |
| 708 | * reallocates the buffer list of the same size order to accommodate the new |
| 709 | * buffers. |
| 710 | */ |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 711 | int drm_legacy_addbufs_agp(struct drm_device *dev, |
| 712 | struct drm_buf_desc *request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 714 | struct drm_device_dma *dma = dev->dma; |
| 715 | struct drm_buf_entry *entry; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 716 | struct drm_agp_mem *agp_entry; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 717 | struct drm_buf *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | unsigned long offset; |
| 719 | unsigned long agp_offset; |
| 720 | int count; |
| 721 | int order; |
| 722 | int size; |
| 723 | int alignment; |
| 724 | int page_order; |
| 725 | int total; |
| 726 | int byte_count; |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 727 | int i, valid; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 728 | struct drm_buf **temp_buflist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 730 | if (!dma) |
| 731 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 733 | count = request->count; |
Daniel Vetter | 04420c9 | 2013-07-10 14:11:57 +0200 | [diff] [blame] | 734 | order = order_base_2(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 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
| 738 | ? PAGE_ALIGN(size) : size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
| 740 | total = PAGE_SIZE << page_order; |
| 741 | |
| 742 | byte_count = 0; |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 743 | agp_offset = dev->agp->base + request->agp_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 745 | DRM_DEBUG("count: %d\n", count); |
| 746 | DRM_DEBUG("order: %d\n", order); |
| 747 | DRM_DEBUG("size: %d\n", size); |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 748 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 749 | DRM_DEBUG("alignment: %d\n", alignment); |
| 750 | DRM_DEBUG("page_order: %d\n", page_order); |
| 751 | DRM_DEBUG("total: %d\n", total); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 753 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
| 754 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 756 | /* Make sure buffers are located in AGP memory that we own */ |
| 757 | valid = 0; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 758 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 759 | if ((agp_offset >= agp_entry->bound) && |
| 760 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { |
| 761 | valid = 1; |
| 762 | break; |
| 763 | } |
| 764 | } |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 765 | if (!list_empty(&dev->agp->memory) && !valid) { |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 766 | DRM_DEBUG("zone invalid\n"); |
| 767 | return -EINVAL; |
| 768 | } |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 769 | spin_lock(&dev->buf_lock); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 770 | if (dev->buf_use) { |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 771 | spin_unlock(&dev->buf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | return -EBUSY; |
| 773 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 774 | atomic_inc(&dev->buf_alloc); |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 775 | spin_unlock(&dev->buf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 777 | mutex_lock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | entry = &dma->bufs[order]; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 779 | if (entry->buf_count) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 780 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 781 | atomic_dec(&dev->buf_alloc); |
| 782 | return -ENOMEM; /* May only call once for each order */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | } |
| 784 | |
| 785 | if (count < 0 || count > 4096) { |
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 -EINVAL; |
| 789 | } |
| 790 | |
Markus Elfring | 81a4413 | 2016-09-19 17:24:20 +0200 | [diff] [blame] | 791 | entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 792 | if (!entry->buflist) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 793 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 794 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | return -ENOMEM; |
| 796 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | |
| 798 | entry->buf_size = size; |
| 799 | entry->page_order = page_order; |
| 800 | |
| 801 | offset = 0; |
| 802 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 803 | while (entry->buf_count < count) { |
| 804 | buf = &entry->buflist[entry->buf_count]; |
| 805 | buf->idx = dma->buf_count + entry->buf_count; |
| 806 | buf->total = alignment; |
| 807 | buf->order = order; |
| 808 | buf->used = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 810 | buf->offset = (dma->byte_count + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | buf->bus_address = agp_offset + offset; |
| 812 | buf->address = (void *)(agp_offset + offset); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 813 | buf->next = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | buf->waiting = 0; |
| 815 | buf->pending = 0; |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 816 | buf->file_priv = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
| 818 | buf->dev_priv_size = dev->driver->dev_priv_size; |
Davidlohr Bueso | 94e3370 | 2010-08-11 09:18:52 -0400 | [diff] [blame] | 819 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 820 | if (!buf->dev_private) { |
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; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 823 | drm_cleanup_buf_error(dev, entry); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 824 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 825 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | return -ENOMEM; |
| 827 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 829 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | |
| 831 | offset += alignment; |
| 832 | entry->buf_count++; |
| 833 | byte_count += PAGE_SIZE << page_order; |
| 834 | } |
| 835 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 836 | DRM_DEBUG("byte_count: %d\n", byte_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 838 | temp_buflist = krealloc(dma->buflist, |
| 839 | (dma->buf_count + entry->buf_count) * |
| 840 | sizeof(*dma->buflist), GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 841 | if (!temp_buflist) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | /* Free the entry because it isn't valid */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 843 | drm_cleanup_buf_error(dev, entry); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 844 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 845 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | return -ENOMEM; |
| 847 | } |
| 848 | dma->buflist = temp_buflist; |
| 849 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 850 | for (i = 0; i < entry->buf_count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
| 852 | } |
| 853 | |
| 854 | dma->buf_count += entry->buf_count; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 855 | dma->seg_count += entry->seg_count; |
| 856 | dma->page_count += byte_count >> PAGE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | dma->byte_count += byte_count; |
| 858 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 859 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
| 860 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 862 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 864 | request->count = entry->buf_count; |
| 865 | request->size = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | |
| 867 | dma->flags = _DRM_DMA_USE_AGP; |
| 868 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 869 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | return 0; |
| 871 | } |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 872 | EXPORT_SYMBOL(drm_legacy_addbufs_agp); |
Daniel Vetter | a7fb8a2 | 2015-09-09 16:45:52 +0200 | [diff] [blame] | 873 | #endif /* CONFIG_AGP */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 874 | |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 875 | int drm_legacy_addbufs_pci(struct drm_device *dev, |
| 876 | struct drm_buf_desc *request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 878 | struct drm_device_dma *dma = dev->dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | int count; |
| 880 | int order; |
| 881 | int size; |
| 882 | int total; |
| 883 | int page_order; |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 884 | struct drm_buf_entry *entry; |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 885 | drm_dma_handle_t *dmah; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 886 | struct drm_buf *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | int alignment; |
| 888 | unsigned long offset; |
| 889 | int i; |
| 890 | int byte_count; |
| 891 | int page_count; |
| 892 | unsigned long *temp_pagelist; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 893 | struct drm_buf **temp_buflist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 895 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 896 | return -EOPNOTSUPP; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 897 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 898 | if (!dma) |
| 899 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 901 | if (!capable(CAP_SYS_ADMIN)) |
| 902 | return -EPERM; |
| 903 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 904 | count = request->count; |
Daniel Vetter | 04420c9 | 2013-07-10 14:11:57 +0200 | [diff] [blame] | 905 | order = order_base_2(request->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | size = 1 << order; |
| 907 | |
Daniel Vetter | a344a7e | 2011-10-26 00:54:41 +0200 | [diff] [blame] | 908 | DRM_DEBUG("count=%d, size=%d (%d), order=%d\n", |
| 909 | request->count, request->size, size, order); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 911 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
| 912 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 914 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 915 | ? PAGE_ALIGN(size) : size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
| 917 | total = PAGE_SIZE << page_order; |
| 918 | |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 919 | spin_lock(&dev->buf_lock); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 920 | if (dev->buf_use) { |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 921 | spin_unlock(&dev->buf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | return -EBUSY; |
| 923 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 924 | atomic_inc(&dev->buf_alloc); |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 925 | spin_unlock(&dev->buf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 927 | mutex_lock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | entry = &dma->bufs[order]; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 929 | if (entry->buf_count) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 930 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 931 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | return -ENOMEM; /* May only call once for each order */ |
| 933 | } |
| 934 | |
| 935 | if (count < 0 || count > 4096) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 936 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 937 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | return -EINVAL; |
| 939 | } |
| 940 | |
Markus Elfring | ed6dee4 | 2016-09-19 17:17:34 +0200 | [diff] [blame] | 941 | entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 942 | if (!entry->buflist) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 943 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 944 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | return -ENOMEM; |
| 946 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | |
Markus Elfring | ed6dee4 | 2016-09-19 17:17:34 +0200 | [diff] [blame] | 948 | entry->seglist = kcalloc(count, sizeof(*entry->seglist), GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 949 | if (!entry->seglist) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 950 | kfree(entry->buflist); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 951 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 952 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | return -ENOMEM; |
| 954 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | |
| 956 | /* Keep the original pagelist until we know all the allocations |
| 957 | * have succeeded |
| 958 | */ |
Markus Elfring | 2027400 | 2016-09-19 17:07:06 +0200 | [diff] [blame] | 959 | temp_pagelist = kmalloc_array(dma->page_count + (count << page_order), |
| 960 | sizeof(*dma->pagelist), |
| 961 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | if (!temp_pagelist) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 963 | kfree(entry->buflist); |
| 964 | kfree(entry->seglist); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 965 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 966 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | return -ENOMEM; |
| 968 | } |
| 969 | memcpy(temp_pagelist, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 970 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
| 971 | DRM_DEBUG("pagelist: %d entries\n", |
| 972 | dma->page_count + (count << page_order)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 974 | entry->buf_size = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | entry->page_order = page_order; |
| 976 | byte_count = 0; |
| 977 | page_count = 0; |
| 978 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 979 | while (entry->buf_count < count) { |
Dave Airlie | bc5f452 | 2007-11-05 12:50:58 +1000 | [diff] [blame] | 980 | |
Zhenyu Wang | e6be8d9 | 2010-01-05 11:25:05 +0800 | [diff] [blame] | 981 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000); |
Dave Airlie | bc5f452 | 2007-11-05 12:50:58 +1000 | [diff] [blame] | 982 | |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 983 | if (!dmah) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | /* Set count correctly so we free the proper amount. */ |
| 985 | entry->buf_count = count; |
| 986 | entry->seg_count = count; |
| 987 | drm_cleanup_buf_error(dev, entry); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 988 | kfree(temp_pagelist); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 989 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 990 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | return -ENOMEM; |
| 992 | } |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 993 | entry->seglist[entry->seg_count++] = dmah; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 994 | for (i = 0; i < (1 << page_order); i++) { |
| 995 | DRM_DEBUG("page %d @ 0x%08lx\n", |
| 996 | dma->page_count + page_count, |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 997 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | temp_pagelist[dma->page_count + page_count++] |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 999 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1001 | for (offset = 0; |
| 1002 | offset + size <= total && entry->buf_count < count; |
| 1003 | offset += alignment, ++entry->buf_count) { |
| 1004 | buf = &entry->buflist[entry->buf_count]; |
| 1005 | buf->idx = dma->buf_count + entry->buf_count; |
| 1006 | buf->total = alignment; |
| 1007 | buf->order = order; |
| 1008 | buf->used = 0; |
| 1009 | buf->offset = (dma->byte_count + byte_count + offset); |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 1010 | buf->address = (void *)(dmah->vaddr + offset); |
| 1011 | buf->bus_address = dmah->busaddr + offset; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1012 | buf->next = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | buf->waiting = 0; |
| 1014 | buf->pending = 0; |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1015 | buf->file_priv = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | |
| 1017 | buf->dev_priv_size = dev->driver->dev_priv_size; |
Davidlohr Bueso | 94e3370 | 2010-08-11 09:18:52 -0400 | [diff] [blame] | 1018 | buf->dev_private = kzalloc(buf->dev_priv_size, |
| 1019 | GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1020 | if (!buf->dev_private) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | /* Set count correctly so we free the proper amount. */ |
| 1022 | entry->buf_count = count; |
| 1023 | entry->seg_count = count; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1024 | drm_cleanup_buf_error(dev, entry); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 1025 | kfree(temp_pagelist); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1026 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1027 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | return -ENOMEM; |
| 1029 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1031 | DRM_DEBUG("buffer %d @ %p\n", |
| 1032 | entry->buf_count, buf->address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | } |
| 1034 | byte_count += PAGE_SIZE << page_order; |
| 1035 | } |
| 1036 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 1037 | temp_buflist = krealloc(dma->buflist, |
| 1038 | (dma->buf_count + entry->buf_count) * |
| 1039 | sizeof(*dma->buflist), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | if (!temp_buflist) { |
| 1041 | /* Free the entry because it isn't valid */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1042 | drm_cleanup_buf_error(dev, entry); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 1043 | kfree(temp_pagelist); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1044 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1045 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | return -ENOMEM; |
| 1047 | } |
| 1048 | dma->buflist = temp_buflist; |
| 1049 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1050 | for (i = 0; i < entry->buf_count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
| 1052 | } |
| 1053 | |
Thomas Weber | 8839316 | 2010-03-16 11:47:56 +0100 | [diff] [blame] | 1054 | /* No allocations failed, so now we can replace the original pagelist |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | * with the new one. |
| 1056 | */ |
| 1057 | if (dma->page_count) { |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 1058 | kfree(dma->pagelist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | } |
| 1060 | dma->pagelist = temp_pagelist; |
| 1061 | |
| 1062 | dma->buf_count += entry->buf_count; |
| 1063 | dma->seg_count += entry->seg_count; |
| 1064 | dma->page_count += entry->seg_count << page_order; |
| 1065 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); |
| 1066 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1067 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1069 | request->count = entry->buf_count; |
| 1070 | request->size = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | |
George Sapountzis | 3417f33 | 2006-10-24 12:03:04 -0700 | [diff] [blame] | 1072 | if (request->flags & _DRM_PCI_BUFFER_RO) |
| 1073 | dma->flags = _DRM_DMA_USE_PCI_RO; |
| 1074 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1075 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | return 0; |
| 1077 | |
| 1078 | } |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 1079 | EXPORT_SYMBOL(drm_legacy_addbufs_pci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 1081 | static int drm_legacy_addbufs_sg(struct drm_device *dev, |
| 1082 | struct drm_buf_desc *request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1084 | struct drm_device_dma *dma = dev->dma; |
| 1085 | struct drm_buf_entry *entry; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 1086 | struct drm_buf *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | unsigned long offset; |
| 1088 | unsigned long agp_offset; |
| 1089 | int count; |
| 1090 | int order; |
| 1091 | int size; |
| 1092 | int alignment; |
| 1093 | int page_order; |
| 1094 | int total; |
| 1095 | int byte_count; |
| 1096 | int i; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 1097 | struct drm_buf **temp_buflist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1099 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1100 | return -EOPNOTSUPP; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1101 | |
| 1102 | if (!dma) |
| 1103 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 1105 | if (!capable(CAP_SYS_ADMIN)) |
| 1106 | return -EPERM; |
| 1107 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1108 | count = request->count; |
Daniel Vetter | 04420c9 | 2013-07-10 14:11:57 +0200 | [diff] [blame] | 1109 | order = order_base_2(request->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | size = 1 << order; |
| 1111 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1112 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
| 1113 | ? PAGE_ALIGN(size) : size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
| 1115 | total = PAGE_SIZE << page_order; |
| 1116 | |
| 1117 | byte_count = 0; |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1118 | agp_offset = request->agp_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1120 | DRM_DEBUG("count: %d\n", count); |
| 1121 | DRM_DEBUG("order: %d\n", order); |
| 1122 | DRM_DEBUG("size: %d\n", size); |
| 1123 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); |
| 1124 | DRM_DEBUG("alignment: %d\n", alignment); |
| 1125 | DRM_DEBUG("page_order: %d\n", page_order); |
| 1126 | DRM_DEBUG("total: %d\n", total); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1128 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
| 1129 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 1131 | spin_lock(&dev->buf_lock); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1132 | if (dev->buf_use) { |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 1133 | spin_unlock(&dev->buf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | return -EBUSY; |
| 1135 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1136 | atomic_inc(&dev->buf_alloc); |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 1137 | spin_unlock(&dev->buf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1139 | mutex_lock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | entry = &dma->bufs[order]; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1141 | if (entry->buf_count) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1142 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1143 | atomic_dec(&dev->buf_alloc); |
| 1144 | return -ENOMEM; /* May only call once for each order */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | } |
| 1146 | |
| 1147 | if (count < 0 || count > 4096) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1148 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1149 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | return -EINVAL; |
| 1151 | } |
| 1152 | |
Markus Elfring | b5a2ecd | 2016-09-19 17:30:31 +0200 | [diff] [blame] | 1153 | entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1154 | if (!entry->buflist) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1155 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1156 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | return -ENOMEM; |
| 1158 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | |
| 1160 | entry->buf_size = size; |
| 1161 | entry->page_order = page_order; |
| 1162 | |
| 1163 | offset = 0; |
| 1164 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1165 | while (entry->buf_count < count) { |
| 1166 | buf = &entry->buflist[entry->buf_count]; |
| 1167 | buf->idx = dma->buf_count + entry->buf_count; |
| 1168 | buf->total = alignment; |
| 1169 | buf->order = order; |
| 1170 | buf->used = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1172 | buf->offset = (dma->byte_count + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | buf->bus_address = agp_offset + offset; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1174 | buf->address = (void *)(agp_offset + offset |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 1175 | + (unsigned long)dev->sg->virtual); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1176 | buf->next = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | buf->waiting = 0; |
| 1178 | buf->pending = 0; |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1179 | buf->file_priv = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | |
| 1181 | buf->dev_priv_size = dev->driver->dev_priv_size; |
Davidlohr Bueso | 94e3370 | 2010-08-11 09:18:52 -0400 | [diff] [blame] | 1182 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1183 | if (!buf->dev_private) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | /* Set count correctly so we free the proper amount. */ |
| 1185 | entry->buf_count = count; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1186 | drm_cleanup_buf_error(dev, entry); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1187 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1188 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | return -ENOMEM; |
| 1190 | } |
| 1191 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1192 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | |
| 1194 | offset += alignment; |
| 1195 | entry->buf_count++; |
| 1196 | byte_count += PAGE_SIZE << page_order; |
| 1197 | } |
| 1198 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1199 | DRM_DEBUG("byte_count: %d\n", byte_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 1201 | temp_buflist = krealloc(dma->buflist, |
| 1202 | (dma->buf_count + entry->buf_count) * |
| 1203 | sizeof(*dma->buflist), GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1204 | if (!temp_buflist) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | /* Free the entry because it isn't valid */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1206 | drm_cleanup_buf_error(dev, entry); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1207 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1208 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | return -ENOMEM; |
| 1210 | } |
| 1211 | dma->buflist = temp_buflist; |
| 1212 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1213 | for (i = 0; i < entry->buf_count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
| 1215 | } |
| 1216 | |
| 1217 | dma->buf_count += entry->buf_count; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 1218 | dma->seg_count += entry->seg_count; |
| 1219 | dma->page_count += byte_count >> PAGE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | dma->byte_count += byte_count; |
| 1221 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1222 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
| 1223 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 1225 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1227 | request->count = entry->buf_count; |
| 1228 | request->size = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | |
| 1230 | dma->flags = _DRM_DMA_USE_SG; |
| 1231 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1232 | atomic_dec(&dev->buf_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | return 0; |
| 1234 | } |
| 1235 | |
Benjamin Gaignard | abee549 | 2020-03-06 11:29:36 +0100 | [diff] [blame] | 1236 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | * Add buffers for DMA transfers (ioctl). |
| 1238 | * |
| 1239 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1240 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | * \param cmd command. |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 1242 | * \param arg pointer to a struct drm_buf_desc request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | * \return zero on success or a negative number on failure. |
| 1244 | * |
| 1245 | * According with the memory type specified in drm_buf_desc::flags and the |
| 1246 | * build options, it dispatches the call either to addbufs_agp(), |
| 1247 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent |
| 1248 | * PCI memory respectively. |
| 1249 | */ |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 1250 | int drm_legacy_addbufs(struct drm_device *dev, void *data, |
| 1251 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1253 | struct drm_buf_desc *request = data; |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1254 | int ret; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1255 | |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 1256 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1257 | return -EOPNOTSUPP; |
Daniel Vetter | 8d38c4b | 2013-08-08 15:41:20 +0200 | [diff] [blame] | 1258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1260 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | |
Daniel Vetter | a7fb8a2 | 2015-09-09 16:45:52 +0200 | [diff] [blame] | 1262 | #if IS_ENABLED(CONFIG_AGP) |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1263 | if (request->flags & _DRM_AGP_BUFFER) |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 1264 | ret = drm_legacy_addbufs_agp(dev, request); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | else |
| 1266 | #endif |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1267 | if (request->flags & _DRM_SG_BUFFER) |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 1268 | ret = drm_legacy_addbufs_sg(dev, request); |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1269 | else if (request->flags & _DRM_FB_BUFFER) |
Daniel Vetter | 687fbb2 | 2013-08-08 15:41:24 +0200 | [diff] [blame] | 1270 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | else |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 1272 | ret = drm_legacy_addbufs_pci(dev, request); |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1273 | |
Dave Airlie | d59431b | 2005-07-10 15:00:06 +1000 | [diff] [blame] | 1274 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | } |
| 1276 | |
Benjamin Gaignard | abee549 | 2020-03-06 11:29:36 +0100 | [diff] [blame] | 1277 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | * Get information about the buffer mappings. |
| 1279 | * |
| 1280 | * This was originally mean for debugging purposes, or by a sophisticated |
| 1281 | * client library to determine how best to use the available buffers (e.g., |
| 1282 | * large buffers can be used for image transfer). |
| 1283 | * |
| 1284 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1285 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | * \param cmd command. |
| 1287 | * \param arg pointer to a drm_buf_info structure. |
| 1288 | * \return zero on success or a negative number on failure. |
| 1289 | * |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 1290 | * Increments drm_device::buf_use while holding the drm_device::buf_lock |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | * lock, preventing of allocating more buffers after this call. Information |
| 1292 | * about each requested buffer is then copied into user space. |
| 1293 | */ |
Al Viro | 5c7640a | 2017-05-24 17:54:09 -0400 | [diff] [blame] | 1294 | int __drm_legacy_infobufs(struct drm_device *dev, |
| 1295 | void *data, int *p, |
| 1296 | int (*f)(void *, int, struct drm_buf_entry *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1298 | struct drm_device_dma *dma = dev->dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | int i; |
| 1300 | int count; |
| 1301 | |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 1302 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1303 | return -EOPNOTSUPP; |
Daniel Vetter | 8d38c4b | 2013-08-08 15:41:20 +0200 | [diff] [blame] | 1304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1306 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1308 | if (!dma) |
| 1309 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 1311 | spin_lock(&dev->buf_lock); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1312 | if (atomic_read(&dev->buf_alloc)) { |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 1313 | spin_unlock(&dev->buf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | return -EBUSY; |
| 1315 | } |
| 1316 | ++dev->buf_use; /* Can't allocate more after this call */ |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 1317 | spin_unlock(&dev->buf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1319 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
| 1320 | if (dma->bufs[i].buf_count) |
| 1321 | ++count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | } |
| 1323 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1324 | DRM_DEBUG("count = %d\n", count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | |
Al Viro | 5c7640a | 2017-05-24 17:54:09 -0400 | [diff] [blame] | 1326 | if (*p >= count) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1327 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
Al Viro | 5c7640a | 2017-05-24 17:54:09 -0400 | [diff] [blame] | 1328 | struct drm_buf_entry *from = &dma->bufs[i]; |
Suraj Upadhyay | 948de842 | 2020-07-02 18:53:32 +0530 | [diff] [blame] | 1329 | |
Al Viro | 5c7640a | 2017-05-24 17:54:09 -0400 | [diff] [blame] | 1330 | if (from->buf_count) { |
| 1331 | if (f(data, count, from) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | return -EFAULT; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1333 | DRM_DEBUG("%d %d %d %d %d\n", |
| 1334 | i, |
| 1335 | dma->bufs[i].buf_count, |
| 1336 | dma->bufs[i].buf_size, |
David Herrmann | b008c0f | 2014-07-23 17:26:36 +0200 | [diff] [blame] | 1337 | dma->bufs[i].low_mark, |
| 1338 | dma->bufs[i].high_mark); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | ++count; |
| 1340 | } |
| 1341 | } |
| 1342 | } |
Al Viro | 5c7640a | 2017-05-24 17:54:09 -0400 | [diff] [blame] | 1343 | *p = count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | |
| 1345 | return 0; |
| 1346 | } |
| 1347 | |
Al Viro | 5c7640a | 2017-05-24 17:54:09 -0400 | [diff] [blame] | 1348 | static int copy_one_buf(void *data, int count, struct drm_buf_entry *from) |
| 1349 | { |
| 1350 | struct drm_buf_info *request = data; |
| 1351 | struct drm_buf_desc __user *to = &request->list[count]; |
| 1352 | struct drm_buf_desc v = {.count = from->buf_count, |
| 1353 | .size = from->buf_size, |
| 1354 | .low_mark = from->low_mark, |
| 1355 | .high_mark = from->high_mark}; |
Dan Carpenter | 74b67ef | 2019-06-18 16:18:43 +0300 | [diff] [blame] | 1356 | |
| 1357 | if (copy_to_user(to, &v, offsetof(struct drm_buf_desc, flags))) |
| 1358 | return -EFAULT; |
| 1359 | return 0; |
Al Viro | 5c7640a | 2017-05-24 17:54:09 -0400 | [diff] [blame] | 1360 | } |
| 1361 | |
| 1362 | int drm_legacy_infobufs(struct drm_device *dev, void *data, |
| 1363 | struct drm_file *file_priv) |
| 1364 | { |
| 1365 | struct drm_buf_info *request = data; |
Suraj Upadhyay | 948de842 | 2020-07-02 18:53:32 +0530 | [diff] [blame] | 1366 | |
Al Viro | 5c7640a | 2017-05-24 17:54:09 -0400 | [diff] [blame] | 1367 | return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf); |
| 1368 | } |
| 1369 | |
Benjamin Gaignard | abee549 | 2020-03-06 11:29:36 +0100 | [diff] [blame] | 1370 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | * Specifies a low and high water mark for buffer allocation |
| 1372 | * |
| 1373 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1374 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | * \param cmd command. |
| 1376 | * \param arg a pointer to a drm_buf_desc structure. |
| 1377 | * \return zero on success or a negative number on failure. |
| 1378 | * |
| 1379 | * Verifies that the size order is bounded between the admissible orders and |
| 1380 | * updates the respective drm_device_dma::bufs entry low and high water mark. |
| 1381 | * |
| 1382 | * \note This ioctl is deprecated and mostly never used. |
| 1383 | */ |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 1384 | int drm_legacy_markbufs(struct drm_device *dev, void *data, |
| 1385 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1387 | struct drm_device_dma *dma = dev->dma; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1388 | struct drm_buf_desc *request = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | int order; |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1390 | struct drm_buf_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 1392 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1393 | return -EOPNOTSUPP; |
Daniel Vetter | 8d38c4b | 2013-08-08 15:41:20 +0200 | [diff] [blame] | 1394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1396 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1398 | if (!dma) |
| 1399 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1401 | DRM_DEBUG("%d, %d, %d\n", |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1402 | request->size, request->low_mark, request->high_mark); |
Daniel Vetter | 04420c9 | 2013-07-10 14:11:57 +0200 | [diff] [blame] | 1403 | order = order_base_2(request->size); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1404 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
| 1405 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | entry = &dma->bufs[order]; |
| 1407 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1408 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | return -EINVAL; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1410 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | return -EINVAL; |
| 1412 | |
David Herrmann | b008c0f | 2014-07-23 17:26:36 +0200 | [diff] [blame] | 1413 | entry->low_mark = request->low_mark; |
| 1414 | entry->high_mark = request->high_mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | |
| 1416 | return 0; |
| 1417 | } |
| 1418 | |
Benjamin Gaignard | abee549 | 2020-03-06 11:29:36 +0100 | [diff] [blame] | 1419 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1420 | * Unreserve the buffers in list, previously reserved using drmDMA. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | * |
| 1422 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1423 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | * \param cmd command. |
| 1425 | * \param arg pointer to a drm_buf_free structure. |
| 1426 | * \return zero on success or a negative number on failure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1427 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | * Calls free_buffer() for each used buffer. |
| 1429 | * This function is primarily used for debugging. |
| 1430 | */ |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 1431 | int drm_legacy_freebufs(struct drm_device *dev, void *data, |
| 1432 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1434 | struct drm_device_dma *dma = dev->dma; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1435 | struct drm_buf_free *request = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | int i; |
| 1437 | int idx; |
Dave Airlie | 056219e | 2007-07-11 16:17:42 +1000 | [diff] [blame] | 1438 | struct drm_buf *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 1440 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1441 | return -EOPNOTSUPP; |
Daniel Vetter | 8d38c4b | 2013-08-08 15:41:20 +0200 | [diff] [blame] | 1442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1444 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1446 | if (!dma) |
| 1447 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1449 | DRM_DEBUG("%d\n", request->count); |
| 1450 | for (i = 0; i < request->count; i++) { |
| 1451 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | return -EFAULT; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1453 | if (idx < 0 || idx >= dma->buf_count) { |
| 1454 | DRM_ERROR("Index %d (of %d max)\n", |
| 1455 | idx, dma->buf_count - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | return -EINVAL; |
| 1457 | } |
Gustavo A. R. Silva | a378050 | 2018-10-16 11:55:49 +0200 | [diff] [blame] | 1458 | idx = array_index_nospec(idx, dma->buf_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | buf = dma->buflist[idx]; |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1460 | if (buf->file_priv != file_priv) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1461 | DRM_ERROR("Process %d freeing buffer not owned\n", |
Pavel Emelyanov | ba25f9d | 2007-10-18 23:40:40 -0700 | [diff] [blame] | 1462 | task_pid_nr(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | return -EINVAL; |
| 1464 | } |
Daniel Vetter | a266162 | 2014-09-11 07:41:51 +0200 | [diff] [blame] | 1465 | drm_legacy_free_buffer(dev, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | } |
| 1467 | |
| 1468 | return 0; |
| 1469 | } |
| 1470 | |
Benjamin Gaignard | abee549 | 2020-03-06 11:29:36 +0100 | [diff] [blame] | 1471 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | * Maps all of the DMA buffers into client-virtual space (ioctl). |
| 1473 | * |
| 1474 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1475 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | * \param cmd command. |
| 1477 | * \param arg pointer to a drm_buf_map structure. |
| 1478 | * \return zero on success or a negative number on failure. |
| 1479 | * |
Linus Torvalds | 6be5ceb | 2012-04-20 17:13:58 -0700 | [diff] [blame] | 1480 | * Maps the AGP, SG or PCI buffer region with vm_mmap(), and copies information |
| 1481 | * about each buffer into user space. For PCI buffers, it calls vm_mmap() with |
George Sapountzis | 3417f33 | 2006-10-24 12:03:04 -0700 | [diff] [blame] | 1482 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls |
| 1483 | * drm_mmap_dma(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | */ |
Al Viro | 87d3ce1 | 2017-05-25 16:24:20 -0400 | [diff] [blame] | 1485 | int __drm_legacy_mapbufs(struct drm_device *dev, void *data, int *p, |
| 1486 | void __user **v, |
| 1487 | int (*f)(void *, int, unsigned long, |
Paul McQuade | 2bcfcbf | 2018-03-19 00:52:22 +0000 | [diff] [blame] | 1488 | struct drm_buf *), |
| 1489 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | { |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 1491 | struct drm_device_dma *dma = dev->dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | int retcode = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | unsigned long virtual; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | int i; |
| 1495 | |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 1496 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1497 | return -EOPNOTSUPP; |
Daniel Vetter | 8d38c4b | 2013-08-08 15:41:20 +0200 | [diff] [blame] | 1498 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1500 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1502 | if (!dma) |
| 1503 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 1505 | spin_lock(&dev->buf_lock); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1506 | if (atomic_read(&dev->buf_alloc)) { |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 1507 | spin_unlock(&dev->buf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | return -EBUSY; |
| 1509 | } |
| 1510 | dev->buf_use++; /* Can't allocate more after this call */ |
Daniel Vetter | 2177a21 | 2013-12-16 11:21:06 +0100 | [diff] [blame] | 1511 | spin_unlock(&dev->buf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | |
Al Viro | 87d3ce1 | 2017-05-25 16:24:20 -0400 | [diff] [blame] | 1513 | if (*p >= dma->buf_count) { |
Daniel Vetter | d990675 | 2013-12-11 11:34:35 +0100 | [diff] [blame] | 1514 | if ((dev->agp && (dma->flags & _DRM_DMA_USE_AGP)) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1515 | || (drm_core_check_feature(dev, DRIVER_SG) |
Daniel Vetter | 687fbb2 | 2013-08-08 15:41:24 +0200 | [diff] [blame] | 1516 | && (dma->flags & _DRM_DMA_USE_SG))) { |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 1517 | struct drm_local_map *map = dev->agp_buffer_map; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 1518 | unsigned long token = dev->agp_buffer_token; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1520 | if (!map) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | retcode = -EINVAL; |
| 1522 | goto done; |
| 1523 | } |
Linus Torvalds | 6be5ceb | 2012-04-20 17:13:58 -0700 | [diff] [blame] | 1524 | virtual = vm_mmap(file_priv->filp, 0, map->size, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1525 | PROT_READ | PROT_WRITE, |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1526 | MAP_SHARED, |
| 1527 | token); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | } else { |
Linus Torvalds | 6be5ceb | 2012-04-20 17:13:58 -0700 | [diff] [blame] | 1529 | virtual = vm_mmap(file_priv->filp, 0, dma->byte_count, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1530 | PROT_READ | PROT_WRITE, |
| 1531 | MAP_SHARED, 0); |
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 | } |
Al Viro | 87d3ce1 | 2017-05-25 16:24:20 -0400 | [diff] [blame] | 1538 | *v = (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++) { |
Al Viro | 87d3ce1 | 2017-05-25 16:24:20 -0400 | [diff] [blame] | 1541 | if (f(data, i, virtual, dma->buflist[i]) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | retcode = -EFAULT; |
| 1543 | goto done; |
| 1544 | } |
| 1545 | } |
| 1546 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1547 | done: |
Al Viro | 87d3ce1 | 2017-05-25 16:24:20 -0400 | [diff] [blame] | 1548 | *p = dma->buf_count; |
| 1549 | DRM_DEBUG("%d buffers, retcode = %d\n", *p, retcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | |
| 1551 | return retcode; |
| 1552 | } |
| 1553 | |
Al Viro | 87d3ce1 | 2017-05-25 16:24:20 -0400 | [diff] [blame] | 1554 | static int map_one_buf(void *data, int idx, unsigned long virtual, |
| 1555 | struct drm_buf *buf) |
| 1556 | { |
| 1557 | struct drm_buf_map *request = data; |
| 1558 | unsigned long address = virtual + buf->offset; /* *** */ |
| 1559 | |
| 1560 | if (copy_to_user(&request->list[idx].idx, &buf->idx, |
| 1561 | sizeof(request->list[0].idx))) |
| 1562 | return -EFAULT; |
| 1563 | if (copy_to_user(&request->list[idx].total, &buf->total, |
| 1564 | sizeof(request->list[0].total))) |
| 1565 | return -EFAULT; |
| 1566 | if (clear_user(&request->list[idx].used, sizeof(int))) |
| 1567 | return -EFAULT; |
| 1568 | if (copy_to_user(&request->list[idx].address, &address, |
| 1569 | sizeof(address))) |
| 1570 | return -EFAULT; |
| 1571 | return 0; |
| 1572 | } |
| 1573 | |
| 1574 | int drm_legacy_mapbufs(struct drm_device *dev, void *data, |
| 1575 | struct drm_file *file_priv) |
| 1576 | { |
| 1577 | struct drm_buf_map *request = data; |
Suraj Upadhyay | 948de842 | 2020-07-02 18:53:32 +0530 | [diff] [blame] | 1578 | |
Al Viro | 87d3ce1 | 2017-05-25 16:24:20 -0400 | [diff] [blame] | 1579 | return __drm_legacy_mapbufs(dev, data, &request->count, |
| 1580 | &request->virtual, map_one_buf, |
| 1581 | file_priv); |
| 1582 | } |
| 1583 | |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 1584 | int drm_legacy_dma_ioctl(struct drm_device *dev, void *data, |
Daniel Vetter | 6eb9278 | 2013-08-08 15:41:29 +0200 | [diff] [blame] | 1585 | struct drm_file *file_priv) |
| 1586 | { |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 1587 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
Chris Wilson | 69fdf42 | 2018-09-13 20:20:50 +0100 | [diff] [blame] | 1588 | return -EOPNOTSUPP; |
Daniel Vetter | 6eb9278 | 2013-08-08 15:41:29 +0200 | [diff] [blame] | 1589 | |
| 1590 | if (dev->driver->dma_ioctl) |
| 1591 | return dev->driver->dma_ioctl(dev, data, file_priv); |
| 1592 | else |
| 1593 | return -EINVAL; |
| 1594 | } |
| 1595 | |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 1596 | struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev) |
Daniel Vetter | bd0c0ce | 2013-07-10 14:11:56 +0200 | [diff] [blame] | 1597 | { |
| 1598 | struct drm_map_list *entry; |
| 1599 | |
| 1600 | list_for_each_entry(entry, &dev->maplist, head) { |
| 1601 | if (entry->map && entry->map->type == _DRM_SHM && |
| 1602 | (entry->map->flags & _DRM_CONTAINS_LOCK)) { |
| 1603 | return entry->map; |
| 1604 | } |
| 1605 | } |
| 1606 | return NULL; |
| 1607 | } |
David Herrmann | 9fc5cde | 2014-08-29 12:12:28 +0200 | [diff] [blame] | 1608 | EXPORT_SYMBOL(drm_legacy_getsarea); |