Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com |
| 3 | * |
| 4 | * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. |
| 5 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| 6 | * All Rights Reserved. |
| 7 | * |
David Herrmann | ec8f112 | 2014-07-23 14:14:53 +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 | |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 31 | #include <drm/drmP.h> |
| 32 | #include <drm/drm_core.h> |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 33 | #include "drm_legacy.h" |
Daniel Vetter | 1888299 | 2014-09-10 08:16:10 +0200 | [diff] [blame] | 34 | #include "drm_internal.h" |
Daniel Vetter | a97df1c | 2014-12-18 22:49:02 +0100 | [diff] [blame] | 35 | #include "drm_crtc_internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 37 | #include <linux/pci.h> |
| 38 | #include <linux/export.h> |
Andy Lutomirski | 0dd99f1 | 2013-05-13 23:58:48 +0000 | [diff] [blame] | 39 | #ifdef CONFIG_X86 |
| 40 | #include <asm/mtrr.h> |
| 41 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
David Herrmann | ec8f112 | 2014-07-23 14:14:53 +0200 | [diff] [blame] | 43 | static int drm_version(struct drm_device *dev, void *data, |
| 44 | struct drm_file *file_priv); |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | /** |
| 47 | * Get the bus id. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 48 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 50 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | * \param cmd command. |
| 52 | * \param arg user argument, pointing to a drm_unique structure. |
| 53 | * \return zero on success or a negative number on failure. |
| 54 | * |
| 55 | * Copies the bus id from drm_device::unique into user space. |
| 56 | */ |
Daniel Vetter | 7823875 | 2014-09-10 12:43:55 +0200 | [diff] [blame] | 57 | static int drm_getunique(struct drm_device *dev, void *data, |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 58 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 60 | struct drm_unique *u = data; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 61 | struct drm_master *master = file_priv->master; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 63 | if (u->unique_len >= master->unique_len) { |
| 64 | if (copy_to_user(u->unique, master->unique, master->unique_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | return -EFAULT; |
| 66 | } |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 67 | u->unique_len = master->unique_len; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | return 0; |
| 70 | } |
| 71 | |
Chris Wilson | 3fb688f | 2010-08-04 11:09:42 +0100 | [diff] [blame] | 72 | static void |
| 73 | drm_unset_busid(struct drm_device *dev, |
| 74 | struct drm_master *master) |
| 75 | { |
Chris Wilson | 3fb688f | 2010-08-04 11:09:42 +0100 | [diff] [blame] | 76 | kfree(master->unique); |
| 77 | master->unique = NULL; |
| 78 | master->unique_len = 0; |
Chris Wilson | 3fb688f | 2010-08-04 11:09:42 +0100 | [diff] [blame] | 79 | } |
| 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | /** |
| 82 | * Set the bus id. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 83 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 85 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | * \param cmd command. |
| 87 | * \param arg user argument, pointing to a drm_unique structure. |
| 88 | * \return zero on success or a negative number on failure. |
| 89 | * |
| 90 | * Copies the bus id from userspace into drm_device::unique, and verifies that |
| 91 | * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated |
| 92 | * in interface version 1.1 and will return EBUSY when setversion has requested |
Daniel Vetter | 53bf2a2 | 2013-11-03 21:47:18 +0100 | [diff] [blame] | 93 | * version 1.1 or greater. Also note that KMS is all version 1.1 and later and |
| 94 | * UMS was only ever supported on pci devices. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | */ |
Daniel Vetter | 7823875 | 2014-09-10 12:43:55 +0200 | [diff] [blame] | 96 | static int drm_setunique(struct drm_device *dev, void *data, |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 97 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 99 | struct drm_unique *u = data; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 100 | struct drm_master *master = file_priv->master; |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 101 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 103 | if (master->unique_len || master->unique) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 104 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 106 | if (!u->unique_len || u->unique_len > 1024) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 107 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
Daniel Vetter | 53bf2a2 | 2013-11-03 21:47:18 +0100 | [diff] [blame] | 109 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
| 110 | return 0; |
| 111 | |
| 112 | if (WARN_ON(!dev->pdev)) |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 113 | return -EINVAL; |
| 114 | |
Daniel Vetter | 53bf2a2 | 2013-11-03 21:47:18 +0100 | [diff] [blame] | 115 | ret = drm_pci_set_unique(dev, master, u); |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 116 | if (ret) |
Chris Wilson | 3fb688f | 2010-08-04 11:09:42 +0100 | [diff] [blame] | 117 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
| 119 | return 0; |
Chris Wilson | 3fb688f | 2010-08-04 11:09:42 +0100 | [diff] [blame] | 120 | |
| 121 | err: |
| 122 | drm_unset_busid(dev, master); |
| 123 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | } |
| 125 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 126 | static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | { |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 128 | struct drm_master *master = file_priv->master; |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 129 | int ret; |
Chris Wilson | 3fb688f | 2010-08-04 11:09:42 +0100 | [diff] [blame] | 130 | |
| 131 | if (master->unique != NULL) |
| 132 | drm_unset_busid(dev, master); |
Dave Airlie | fe34765 | 2006-01-02 21:19:39 +1100 | [diff] [blame] | 133 | |
David Herrmann | 915b4d1 | 2014-08-29 12:12:43 +0200 | [diff] [blame] | 134 | if (dev->driver->set_busid) { |
| 135 | ret = dev->driver->set_busid(dev, master); |
| 136 | if (ret) { |
| 137 | drm_unset_busid(dev, master); |
| 138 | return ret; |
| 139 | } |
Thierry Reding | ca8e2ad | 2014-04-11 15:23:00 +0200 | [diff] [blame] | 140 | } else { |
| 141 | if (WARN(dev->unique == NULL, |
David Herrmann | c5786fe | 2014-08-29 12:12:44 +0200 | [diff] [blame] | 142 | "No drm_driver.set_busid() implementation provided by " |
Thierry Reding | ca8e2ad | 2014-04-11 15:23:00 +0200 | [diff] [blame] | 143 | "%ps. Use drm_dev_set_unique() to set the unique " |
| 144 | "name explicitly.", dev->driver)) |
| 145 | return -EINVAL; |
| 146 | |
| 147 | master->unique = kstrdup(dev->unique, GFP_KERNEL); |
| 148 | if (master->unique) |
| 149 | master->unique_len = strlen(dev->unique); |
| 150 | } |
| 151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | return 0; |
| 153 | } |
| 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | /** |
| 156 | * Get a mapping information. |
| 157 | * |
| 158 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 159 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | * \param cmd command. |
| 161 | * \param arg user argument, pointing to a drm_map structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 162 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | * \return zero on success or a negative number on failure. |
| 164 | * |
| 165 | * Searches for the mapping with the specified offset and copies its information |
| 166 | * into userspace |
| 167 | */ |
Daniel Vetter | 7823875 | 2014-09-10 12:43:55 +0200 | [diff] [blame] | 168 | static int drm_getmap(struct drm_device *dev, void *data, |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 169 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 171 | struct drm_map *map = data; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 172 | struct drm_map_list *r_list = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | struct list_head *list; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 174 | int idx; |
| 175 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 177 | idx = map->offset; |
Ilija Hadzic | 09b4ea4 | 2011-10-28 17:43:28 -0400 | [diff] [blame] | 178 | if (idx < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | i = 0; |
Ilija Hadzic | 09b4ea4 | 2011-10-28 17:43:28 -0400 | [diff] [blame] | 182 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 183 | list_for_each(list, &dev->maplist) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 184 | if (i == idx) { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 185 | r_list = list_entry(list, struct drm_map_list, head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | break; |
| 187 | } |
| 188 | i++; |
| 189 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 190 | if (!r_list || !r_list->map) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 191 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | return -EINVAL; |
| 193 | } |
| 194 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 195 | map->offset = r_list->map->offset; |
| 196 | map->size = r_list->map->size; |
| 197 | map->type = r_list->map->type; |
| 198 | map->flags = r_list->map->flags; |
| 199 | map->handle = (void *)(unsigned long) r_list->user_token; |
Andy Lutomirski | 0dd99f1 | 2013-05-13 23:58:48 +0000 | [diff] [blame] | 200 | |
| 201 | #ifdef CONFIG_X86 |
| 202 | /* |
| 203 | * There appears to be exactly one user of the mtrr index: dritest. |
| 204 | * It's easy enough to keep it working on non-PAT systems. |
| 205 | */ |
| 206 | map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr); |
| 207 | #else |
| 208 | map->mtrr = -1; |
| 209 | #endif |
| 210 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 211 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | /** |
| 217 | * Get client information. |
| 218 | * |
| 219 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 220 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | * \param cmd command. |
| 222 | * \param arg user argument, pointing to a drm_client structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 223 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | * \return zero on success or a negative number on failure. |
| 225 | * |
| 226 | * Searches for the client with the specified index and copies its information |
| 227 | * into userspace |
| 228 | */ |
Daniel Vetter | 7823875 | 2014-09-10 12:43:55 +0200 | [diff] [blame] | 229 | static int drm_getclient(struct drm_device *dev, void *data, |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 230 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 232 | struct drm_client *client = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
Daniel Vetter | 719524d | 2013-08-08 15:41:31 +0200 | [diff] [blame] | 234 | /* |
| 235 | * Hollowed-out getclient ioctl to keep some dead old drm tests/tools |
| 236 | * not breaking completely. Userspace tools stop enumerating one they |
| 237 | * get -EINVAL, hence this is the return value we need to hand back for |
| 238 | * no clients tracked. |
| 239 | * |
| 240 | * Unfortunately some clients (*cough* libva *cough*) use this in a fun |
| 241 | * attempt to figure out whether they're authenticated or not. Since |
| 242 | * that's the only thing they care about, give it to the directly |
| 243 | * instead of walking one giant list. |
| 244 | */ |
| 245 | if (client->idx == 0) { |
| 246 | client->auth = file_priv->authenticated; |
| 247 | client->pid = pid_vnr(file_priv->pid); |
| 248 | client->uid = from_kuid_munged(current_user_ns(), |
| 249 | file_priv->uid); |
| 250 | client->magic = 0; |
| 251 | client->iocs = 0; |
Ilija Hadzic | 09b4ea4 | 2011-10-28 17:43:28 -0400 | [diff] [blame] | 252 | |
Daniel Vetter | 719524d | 2013-08-08 15:41:31 +0200 | [diff] [blame] | 253 | return 0; |
| 254 | } else { |
| 255 | return -EINVAL; |
Eric Anholt | b018fcd | 2007-11-22 18:46:54 +1000 | [diff] [blame] | 256 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | } |
| 258 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 259 | /** |
| 260 | * Get statistics information. |
| 261 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 263 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | * \param cmd command. |
| 265 | * \param arg user argument, pointing to a drm_stats structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 266 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | * \return zero on success or a negative number on failure. |
| 268 | */ |
Daniel Vetter | 7823875 | 2014-09-10 12:43:55 +0200 | [diff] [blame] | 269 | static int drm_getstats(struct drm_device *dev, void *data, |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 270 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 272 | struct drm_stats *stats = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
Daniel Vetter | d79cdc8 | 2013-08-08 15:41:32 +0200 | [diff] [blame] | 274 | /* Clear stats to prevent userspace from eating its stack garbage. */ |
Li Zefan | 246a3d1 | 2007-11-05 12:53:09 +1000 | [diff] [blame] | 275 | memset(stats, 0, sizeof(*stats)); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | /** |
Ben Skeggs | 9f35421 | 2011-02-21 11:17:35 +1000 | [diff] [blame] | 281 | * Get device/driver capabilities |
| 282 | */ |
Daniel Vetter | 7823875 | 2014-09-10 12:43:55 +0200 | [diff] [blame] | 283 | static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) |
Ben Skeggs | 9f35421 | 2011-02-21 11:17:35 +1000 | [diff] [blame] | 284 | { |
| 285 | struct drm_get_cap *req = data; |
| 286 | |
| 287 | req->value = 0; |
Dave Airlie | e73f88a | 2011-03-04 14:50:28 +1000 | [diff] [blame] | 288 | switch (req->capability) { |
| 289 | case DRM_CAP_DUMB_BUFFER: |
| 290 | if (dev->driver->dumb_create) |
| 291 | req->value = 1; |
| 292 | break; |
Dave Airlie | 51eab41 | 2011-03-24 20:54:35 +1000 | [diff] [blame] | 293 | case DRM_CAP_VBLANK_HIGH_CRTC: |
Ilija Hadzic | 19b01b5 | 2011-03-18 16:58:04 -0500 | [diff] [blame] | 294 | req->value = 1; |
| 295 | break; |
Dave Airlie | 019d96c | 2011-09-29 16:20:42 +0100 | [diff] [blame] | 296 | case DRM_CAP_DUMB_PREFERRED_DEPTH: |
| 297 | req->value = dev->mode_config.preferred_depth; |
| 298 | break; |
| 299 | case DRM_CAP_DUMB_PREFER_SHADOW: |
| 300 | req->value = dev->mode_config.prefer_shadow; |
| 301 | break; |
Dave Airlie | 4271a40 | 2012-04-02 14:11:50 +0100 | [diff] [blame] | 302 | case DRM_CAP_PRIME: |
| 303 | req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0; |
| 304 | req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0; |
| 305 | break; |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 306 | case DRM_CAP_TIMESTAMP_MONOTONIC: |
| 307 | req->value = drm_timestamp_monotonic; |
| 308 | break; |
Keith Packard | 62f2104 | 2013-07-22 18:50:00 -0700 | [diff] [blame] | 309 | case DRM_CAP_ASYNC_PAGE_FLIP: |
| 310 | req->value = dev->mode_config.async_page_flip; |
| 311 | break; |
Alex Deucher | 8716ed4 | 2014-02-12 12:48:23 -0500 | [diff] [blame] | 312 | case DRM_CAP_CURSOR_WIDTH: |
| 313 | if (dev->mode_config.cursor_width) |
| 314 | req->value = dev->mode_config.cursor_width; |
| 315 | else |
| 316 | req->value = 64; |
| 317 | break; |
| 318 | case DRM_CAP_CURSOR_HEIGHT: |
| 319 | if (dev->mode_config.cursor_height) |
| 320 | req->value = dev->mode_config.cursor_height; |
| 321 | else |
| 322 | req->value = 64; |
| 323 | break; |
Rob Clark | e3eb325 | 2015-02-05 14:41:52 +0000 | [diff] [blame] | 324 | case DRM_CAP_ADDFB2_MODIFIERS: |
| 325 | req->value = dev->mode_config.allow_fb_modifiers; |
| 326 | break; |
Dave Airlie | e73f88a | 2011-03-04 14:50:28 +1000 | [diff] [blame] | 327 | default: |
| 328 | return -EINVAL; |
| 329 | } |
Ben Skeggs | 9f35421 | 2011-02-21 11:17:35 +1000 | [diff] [blame] | 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | /** |
Damien Lespiau | 1c0814f | 2013-09-25 16:45:20 +0100 | [diff] [blame] | 334 | * Set device/driver capabilities |
| 335 | */ |
Daniel Vetter | 7823875 | 2014-09-10 12:43:55 +0200 | [diff] [blame] | 336 | static int |
Damien Lespiau | 1c0814f | 2013-09-25 16:45:20 +0100 | [diff] [blame] | 337 | drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) |
| 338 | { |
Damien Lespiau | 61d8e32 | 2013-09-25 16:45:22 +0100 | [diff] [blame] | 339 | struct drm_set_client_cap *req = data; |
| 340 | |
| 341 | switch (req->capability) { |
| 342 | case DRM_CLIENT_CAP_STEREO_3D: |
| 343 | if (req->value > 1) |
| 344 | return -EINVAL; |
| 345 | file_priv->stereo_allowed = req->value; |
| 346 | break; |
Matt Roper | 681e7ec | 2014-04-01 15:22:42 -0700 | [diff] [blame] | 347 | case DRM_CLIENT_CAP_UNIVERSAL_PLANES: |
Matt Roper | 681e7ec | 2014-04-01 15:22:42 -0700 | [diff] [blame] | 348 | if (req->value > 1) |
| 349 | return -EINVAL; |
| 350 | file_priv->universal_planes = req->value; |
| 351 | break; |
Rob Clark | 88a48e2 | 2014-12-18 16:01:50 -0500 | [diff] [blame] | 352 | case DRM_CLIENT_CAP_ATOMIC: |
| 353 | /* for now, hide behind experimental drm.atomic moduleparam */ |
| 354 | if (!drm_atomic) |
| 355 | return -EINVAL; |
| 356 | if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) |
| 357 | return -EINVAL; |
| 358 | if (req->value > 1) |
| 359 | return -EINVAL; |
| 360 | file_priv->atomic = req->value; |
Daniel Vetter | 179f158 | 2014-12-19 10:33:52 +0100 | [diff] [blame] | 361 | file_priv->universal_planes = req->value; |
Rob Clark | 88a48e2 | 2014-12-18 16:01:50 -0500 | [diff] [blame] | 362 | break; |
Damien Lespiau | 61d8e32 | 2013-09-25 16:45:22 +0100 | [diff] [blame] | 363 | default: |
| 364 | return -EINVAL; |
| 365 | } |
| 366 | |
| 367 | return 0; |
Damien Lespiau | 1c0814f | 2013-09-25 16:45:20 +0100 | [diff] [blame] | 368 | } |
| 369 | |
| 370 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | * Setversion ioctl. |
| 372 | * |
| 373 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 374 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | * \param cmd command. |
| 376 | * \param arg user argument, pointing to a drm_lock structure. |
| 377 | * \return zero on success or negative number on failure. |
| 378 | * |
| 379 | * Sets the requested interface version |
| 380 | */ |
Daniel Vetter | 7823875 | 2014-09-10 12:43:55 +0200 | [diff] [blame] | 381 | static int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 383 | struct drm_set_version *sv = data; |
| 384 | int if_version, retcode = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 386 | if (sv->drm_di_major != -1) { |
| 387 | if (sv->drm_di_major != DRM_IF_MAJOR || |
| 388 | sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { |
| 389 | retcode = -EINVAL; |
| 390 | goto done; |
| 391 | } |
| 392 | if_version = DRM_IF_VERSION(sv->drm_di_major, |
| 393 | sv->drm_di_minor); |
Dave Airlie | 3d77461 | 2006-08-07 20:07:43 +1000 | [diff] [blame] | 394 | dev->if_version = max(if_version, dev->if_version); |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 395 | if (sv->drm_di_minor >= 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | /* |
| 397 | * Version 1.1 includes tying of DRM to specific device |
Benjamin Herrenschmidt | c17c2f8 | 2010-08-06 13:55:10 +1000 | [diff] [blame] | 398 | * Version 1.4 has proper PCI domain support |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | */ |
Chris Wilson | 3fb688f | 2010-08-04 11:09:42 +0100 | [diff] [blame] | 400 | retcode = drm_set_busid(dev, file_priv); |
| 401 | if (retcode) |
| 402 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } |
| 404 | } |
| 405 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 406 | if (sv->drm_dd_major != -1) { |
| 407 | if (sv->drm_dd_major != dev->driver->major || |
| 408 | sv->drm_dd_minor < 0 || sv->drm_dd_minor > |
| 409 | dev->driver->minor) { |
| 410 | retcode = -EINVAL; |
| 411 | goto done; |
| 412 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 414 | |
| 415 | done: |
| 416 | sv->drm_di_major = DRM_IF_MAJOR; |
| 417 | sv->drm_di_minor = DRM_IF_MINOR; |
| 418 | sv->drm_dd_major = dev->driver->major; |
| 419 | sv->drm_dd_minor = dev->driver->minor; |
| 420 | |
| 421 | return retcode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | /** No-op ioctl. */ |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 425 | int drm_noop(struct drm_device *dev, void *data, |
| 426 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | { |
| 428 | DRM_DEBUG("\n"); |
| 429 | return 0; |
| 430 | } |
Daniel Vetter | b2c606f | 2012-01-17 12:50:12 +0100 | [diff] [blame] | 431 | EXPORT_SYMBOL(drm_noop); |
David Herrmann | ec8f112 | 2014-07-23 14:14:53 +0200 | [diff] [blame] | 432 | |
| 433 | /** |
| 434 | * Copy and IOCTL return string to user space |
| 435 | */ |
| 436 | static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value) |
| 437 | { |
| 438 | int len; |
| 439 | |
| 440 | /* don't overflow userbuf */ |
| 441 | len = strlen(value); |
| 442 | if (len > *buf_len) |
| 443 | len = *buf_len; |
| 444 | |
| 445 | /* let userspace know exact length of driver value (which could be |
| 446 | * larger than the userspace-supplied buffer) */ |
| 447 | *buf_len = strlen(value); |
| 448 | |
| 449 | /* finally, try filling in the userbuf */ |
| 450 | if (len && buf) |
| 451 | if (copy_to_user(buf, value, len)) |
| 452 | return -EFAULT; |
| 453 | return 0; |
| 454 | } |
| 455 | |
| 456 | /** |
| 457 | * Get version information |
| 458 | * |
| 459 | * \param inode device inode. |
| 460 | * \param filp file pointer. |
| 461 | * \param cmd command. |
| 462 | * \param arg user argument, pointing to a drm_version structure. |
| 463 | * \return zero on success or negative number on failure. |
| 464 | * |
| 465 | * Fills in the version information in \p arg. |
| 466 | */ |
| 467 | static int drm_version(struct drm_device *dev, void *data, |
| 468 | struct drm_file *file_priv) |
| 469 | { |
| 470 | struct drm_version *version = data; |
| 471 | int err; |
| 472 | |
| 473 | version->version_major = dev->driver->major; |
| 474 | version->version_minor = dev->driver->minor; |
| 475 | version->version_patchlevel = dev->driver->patchlevel; |
| 476 | err = drm_copy_field(version->name, &version->name_len, |
| 477 | dev->driver->name); |
| 478 | if (!err) |
| 479 | err = drm_copy_field(version->date, &version->date_len, |
| 480 | dev->driver->date); |
| 481 | if (!err) |
| 482 | err = drm_copy_field(version->desc, &version->desc_len, |
| 483 | dev->driver->desc); |
| 484 | |
| 485 | return err; |
| 486 | } |
| 487 | |
| 488 | /** |
| 489 | * drm_ioctl_permit - Check ioctl permissions against caller |
| 490 | * |
| 491 | * @flags: ioctl permission flags. |
| 492 | * @file_priv: Pointer to struct drm_file identifying the caller. |
| 493 | * |
| 494 | * Checks whether the caller is allowed to run an ioctl with the |
| 495 | * indicated permissions. If so, returns zero. Otherwise returns an |
| 496 | * error code suitable for ioctl return. |
| 497 | */ |
| 498 | static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv) |
| 499 | { |
| 500 | /* ROOT_ONLY is only for CAP_SYS_ADMIN */ |
| 501 | if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN))) |
| 502 | return -EACCES; |
| 503 | |
| 504 | /* AUTH is only for authenticated or render client */ |
| 505 | if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) && |
| 506 | !file_priv->authenticated)) |
| 507 | return -EACCES; |
| 508 | |
| 509 | /* MASTER is only for master or control clients */ |
Dave Airlie | 7963e9d | 2014-08-08 07:30:53 +1000 | [diff] [blame] | 510 | if (unlikely((flags & DRM_MASTER) && !file_priv->is_master && |
David Herrmann | ec8f112 | 2014-07-23 14:14:53 +0200 | [diff] [blame] | 511 | !drm_is_control_client(file_priv))) |
| 512 | return -EACCES; |
| 513 | |
| 514 | /* Control clients must be explicitly allowed */ |
| 515 | if (unlikely(!(flags & DRM_CONTROL_ALLOW) && |
| 516 | drm_is_control_client(file_priv))) |
| 517 | return -EACCES; |
| 518 | |
| 519 | /* Render clients must be explicitly allowed */ |
| 520 | if (unlikely(!(flags & DRM_RENDER_ALLOW) && |
| 521 | drm_is_render_client(file_priv))) |
| 522 | return -EACCES; |
| 523 | |
| 524 | return 0; |
| 525 | } |
| 526 | |
Daniel Vetter | 7823875 | 2014-09-10 12:43:55 +0200 | [diff] [blame] | 527 | #define DRM_IOCTL_DEF(ioctl, _func, _flags) \ |
| 528 | [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl} |
| 529 | |
| 530 | /** Ioctl table */ |
| 531 | static const struct drm_ioctl_desc drm_ioctls[] = { |
| 532 | DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW), |
| 533 | DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), |
| 534 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0), |
| 535 | DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), |
| 536 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED), |
| 537 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED), |
| 538 | DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED), |
| 539 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW), |
| 540 | DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0), |
| 541 | DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER), |
| 542 | |
| 543 | DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 544 | DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 545 | DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 546 | DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER), |
| 547 | |
| 548 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 549 | DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH), |
| 550 | |
| 551 | DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 552 | DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH), |
| 553 | |
| 554 | DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY), |
| 555 | DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY), |
| 556 | |
| 557 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY), |
| 558 | DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 559 | DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 560 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH), |
| 561 | DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 562 | DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 563 | DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH), |
| 564 | |
| 565 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 566 | DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 567 | |
| 568 | DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_legacy_lock, DRM_AUTH), |
| 569 | DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_legacy_unlock, DRM_AUTH), |
| 570 | |
| 571 | DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), |
| 572 | |
| 573 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_legacy_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 574 | DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_legacy_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 575 | DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_legacy_infobufs, DRM_AUTH), |
| 576 | DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_legacy_mapbufs, DRM_AUTH), |
| 577 | DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_legacy_freebufs, DRM_AUTH), |
| 578 | DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_legacy_dma_ioctl, DRM_AUTH), |
| 579 | |
| 580 | DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 581 | |
| 582 | #if __OS_HAS_AGP |
| 583 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 584 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 585 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 586 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), |
| 587 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 588 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 589 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 590 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 591 | #endif |
| 592 | |
| 593 | DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_legacy_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 594 | DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_legacy_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 595 | |
| 596 | DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED), |
| 597 | |
| 598 | DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), |
| 599 | |
| 600 | DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
| 601 | |
| 602 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), |
| 603 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED), |
| 604 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED), |
| 605 | |
| 606 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 607 | |
| 608 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), |
| 609 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), |
| 610 | |
| 611 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 612 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 613 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 614 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 615 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 616 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 617 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED), |
| 618 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED), |
| 619 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 620 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 621 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 622 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 623 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 624 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 625 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 626 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 627 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 628 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 629 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 630 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 631 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 632 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 633 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 634 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 635 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 636 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
| 637 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
Rob Clark | d34f20d | 2014-12-18 16:01:56 -0500 | [diff] [blame] | 638 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC, drm_mode_atomic_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
Daniel Vetter | 7823875 | 2014-09-10 12:43:55 +0200 | [diff] [blame] | 639 | }; |
| 640 | |
| 641 | #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) |
| 642 | |
David Herrmann | ec8f112 | 2014-07-23 14:14:53 +0200 | [diff] [blame] | 643 | /** |
| 644 | * Called whenever a process performs an ioctl on /dev/drm. |
| 645 | * |
| 646 | * \param inode device inode. |
| 647 | * \param file_priv DRM file private. |
| 648 | * \param cmd command. |
| 649 | * \param arg user argument. |
| 650 | * \return zero on success or negative number on failure. |
| 651 | * |
| 652 | * Looks up the ioctl function in the ::ioctls table, checking for root |
| 653 | * previleges if so required, and dispatches to the respective function. |
| 654 | */ |
| 655 | long drm_ioctl(struct file *filp, |
| 656 | unsigned int cmd, unsigned long arg) |
| 657 | { |
| 658 | struct drm_file *file_priv = filp->private_data; |
| 659 | struct drm_device *dev; |
| 660 | const struct drm_ioctl_desc *ioctl = NULL; |
| 661 | drm_ioctl_t *func; |
| 662 | unsigned int nr = DRM_IOCTL_NR(cmd); |
| 663 | int retcode = -EINVAL; |
| 664 | char stack_kdata[128]; |
| 665 | char *kdata = NULL; |
| 666 | unsigned int usize, asize; |
| 667 | |
| 668 | dev = file_priv->minor->dev; |
| 669 | |
| 670 | if (drm_device_is_unplugged(dev)) |
| 671 | return -ENODEV; |
| 672 | |
| 673 | if ((nr >= DRM_CORE_IOCTL_COUNT) && |
| 674 | ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) |
| 675 | goto err_i1; |
| 676 | if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && |
| 677 | (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) { |
| 678 | u32 drv_size; |
| 679 | ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; |
| 680 | drv_size = _IOC_SIZE(ioctl->cmd_drv); |
| 681 | usize = asize = _IOC_SIZE(cmd); |
| 682 | if (drv_size > asize) |
| 683 | asize = drv_size; |
| 684 | cmd = ioctl->cmd_drv; |
| 685 | } |
| 686 | else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) { |
| 687 | u32 drv_size; |
| 688 | |
| 689 | ioctl = &drm_ioctls[nr]; |
| 690 | |
| 691 | drv_size = _IOC_SIZE(ioctl->cmd); |
| 692 | usize = asize = _IOC_SIZE(cmd); |
| 693 | if (drv_size > asize) |
| 694 | asize = drv_size; |
| 695 | |
| 696 | cmd = ioctl->cmd; |
| 697 | } else |
| 698 | goto err_i1; |
| 699 | |
| 700 | DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n", |
| 701 | task_pid_nr(current), |
| 702 | (long)old_encode_dev(file_priv->minor->kdev->devt), |
| 703 | file_priv->authenticated, ioctl->name); |
| 704 | |
| 705 | /* Do not trust userspace, use our own definition */ |
| 706 | func = ioctl->func; |
| 707 | |
| 708 | if (unlikely(!func)) { |
| 709 | DRM_DEBUG("no function\n"); |
| 710 | retcode = -EINVAL; |
| 711 | goto err_i1; |
| 712 | } |
| 713 | |
| 714 | retcode = drm_ioctl_permit(ioctl->flags, file_priv); |
| 715 | if (unlikely(retcode)) |
| 716 | goto err_i1; |
| 717 | |
| 718 | if (cmd & (IOC_IN | IOC_OUT)) { |
| 719 | if (asize <= sizeof(stack_kdata)) { |
| 720 | kdata = stack_kdata; |
| 721 | } else { |
| 722 | kdata = kmalloc(asize, GFP_KERNEL); |
| 723 | if (!kdata) { |
| 724 | retcode = -ENOMEM; |
| 725 | goto err_i1; |
| 726 | } |
| 727 | } |
| 728 | if (asize > usize) |
| 729 | memset(kdata + usize, 0, asize - usize); |
| 730 | } |
| 731 | |
| 732 | if (cmd & IOC_IN) { |
| 733 | if (copy_from_user(kdata, (void __user *)arg, |
| 734 | usize) != 0) { |
| 735 | retcode = -EFAULT; |
| 736 | goto err_i1; |
| 737 | } |
| 738 | } else if (cmd & IOC_OUT) { |
| 739 | memset(kdata, 0, usize); |
| 740 | } |
| 741 | |
| 742 | if (ioctl->flags & DRM_UNLOCKED) |
| 743 | retcode = func(dev, kdata, file_priv); |
| 744 | else { |
| 745 | mutex_lock(&drm_global_mutex); |
| 746 | retcode = func(dev, kdata, file_priv); |
| 747 | mutex_unlock(&drm_global_mutex); |
| 748 | } |
| 749 | |
| 750 | if (cmd & IOC_OUT) { |
| 751 | if (copy_to_user((void __user *)arg, kdata, |
| 752 | usize) != 0) |
| 753 | retcode = -EFAULT; |
| 754 | } |
| 755 | |
| 756 | err_i1: |
| 757 | if (!ioctl) |
| 758 | DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n", |
| 759 | task_pid_nr(current), |
| 760 | (long)old_encode_dev(file_priv->minor->kdev->devt), |
| 761 | file_priv->authenticated, cmd, nr); |
| 762 | |
| 763 | if (kdata != stack_kdata) |
| 764 | kfree(kdata); |
| 765 | if (retcode) |
| 766 | DRM_DEBUG("ret = %d\n", retcode); |
| 767 | return retcode; |
| 768 | } |
| 769 | EXPORT_SYMBOL(drm_ioctl); |
| 770 | |
| 771 | /** |
| 772 | * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags |
| 773 | * |
| 774 | * @nr: Ioctl number. |
| 775 | * @flags: Where to return the ioctl permission flags |
| 776 | */ |
| 777 | bool drm_ioctl_flags(unsigned int nr, unsigned int *flags) |
| 778 | { |
| 779 | if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) || |
| 780 | (nr < DRM_COMMAND_BASE)) { |
| 781 | *flags = drm_ioctls[nr].flags; |
| 782 | return true; |
| 783 | } |
| 784 | |
| 785 | return false; |
| 786 | } |
| 787 | EXPORT_SYMBOL(drm_ioctl_flags); |