drm_ioctl.c revision 1.3.4.3
1 1.3.4.2 tls /** 2 1.3.4.2 tls * \file drm_ioctl.c 3 1.3.4.2 tls * IOCTL processing for DRM 4 1.3.4.2 tls * 5 1.3.4.2 tls * \author Rickard E. (Rik) Faith <faith (at) valinux.com> 6 1.3.4.2 tls * \author Gareth Hughes <gareth (at) valinux.com> 7 1.3.4.2 tls */ 8 1.3.4.2 tls 9 1.3.4.2 tls /* 10 1.3.4.2 tls * Created: Fri Jan 8 09:01:26 1999 by faith (at) valinux.com 11 1.3.4.2 tls * 12 1.3.4.2 tls * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 13 1.3.4.2 tls * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 14 1.3.4.2 tls * All Rights Reserved. 15 1.3.4.2 tls * 16 1.3.4.2 tls * Permission is hereby granted, free of charge, to any person obtaining a 17 1.3.4.2 tls * copy of this software and associated documentation files (the "Software"), 18 1.3.4.2 tls * to deal in the Software without restriction, including without limitation 19 1.3.4.2 tls * the rights to use, copy, modify, merge, publish, distribute, sublicense, 20 1.3.4.2 tls * and/or sell copies of the Software, and to permit persons to whom the 21 1.3.4.2 tls * Software is furnished to do so, subject to the following conditions: 22 1.3.4.2 tls * 23 1.3.4.2 tls * The above copyright notice and this permission notice (including the next 24 1.3.4.2 tls * paragraph) shall be included in all copies or substantial portions of the 25 1.3.4.2 tls * Software. 26 1.3.4.2 tls * 27 1.3.4.2 tls * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 28 1.3.4.2 tls * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 29 1.3.4.2 tls * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 30 1.3.4.2 tls * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 31 1.3.4.2 tls * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 32 1.3.4.2 tls * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 33 1.3.4.2 tls * OTHER DEALINGS IN THE SOFTWARE. 34 1.3.4.2 tls */ 35 1.3.4.2 tls 36 1.3.4.2 tls #include <drm/drmP.h> 37 1.3.4.2 tls #include <drm/drm_core.h> 38 1.3.4.2 tls 39 1.3.4.2 tls #include <linux/pci.h> 40 1.3.4.2 tls #include <linux/export.h> 41 1.3.4.2 tls #ifdef CONFIG_X86 42 1.3.4.2 tls #include <asm/mtrr.h> 43 1.3.4.2 tls #endif 44 1.3.4.2 tls 45 1.3.4.2 tls /** 46 1.3.4.2 tls * Get the bus id. 47 1.3.4.2 tls * 48 1.3.4.2 tls * \param inode device inode. 49 1.3.4.2 tls * \param file_priv DRM file private. 50 1.3.4.2 tls * \param cmd command. 51 1.3.4.2 tls * \param arg user argument, pointing to a drm_unique structure. 52 1.3.4.2 tls * \return zero on success or a negative number on failure. 53 1.3.4.2 tls * 54 1.3.4.2 tls * Copies the bus id from drm_device::unique into user space. 55 1.3.4.2 tls */ 56 1.3.4.2 tls int drm_getunique(struct drm_device *dev, void *data, 57 1.3.4.2 tls struct drm_file *file_priv) 58 1.3.4.2 tls { 59 1.3.4.2 tls struct drm_unique *u = data; 60 1.3.4.2 tls struct drm_master *master = file_priv->master; 61 1.3.4.2 tls 62 1.3.4.2 tls if (u->unique_len >= master->unique_len) { 63 1.3.4.2 tls if (copy_to_user(u->unique, master->unique, master->unique_len)) 64 1.3.4.2 tls return -EFAULT; 65 1.3.4.2 tls } 66 1.3.4.2 tls u->unique_len = master->unique_len; 67 1.3.4.2 tls 68 1.3.4.2 tls return 0; 69 1.3.4.2 tls } 70 1.3.4.2 tls 71 1.3.4.2 tls static void 72 1.3.4.2 tls drm_unset_busid(struct drm_device *dev, 73 1.3.4.2 tls struct drm_master *master) 74 1.3.4.2 tls { 75 1.3.4.2 tls kfree(dev->devname); 76 1.3.4.2 tls dev->devname = NULL; 77 1.3.4.2 tls 78 1.3.4.2 tls kfree(master->unique); 79 1.3.4.2 tls master->unique = NULL; 80 1.3.4.2 tls master->unique_len = 0; 81 1.3.4.2 tls master->unique_size = 0; 82 1.3.4.2 tls } 83 1.3.4.2 tls 84 1.3.4.2 tls /** 85 1.3.4.2 tls * Set the bus id. 86 1.3.4.2 tls * 87 1.3.4.2 tls * \param inode device inode. 88 1.3.4.2 tls * \param file_priv DRM file private. 89 1.3.4.2 tls * \param cmd command. 90 1.3.4.2 tls * \param arg user argument, pointing to a drm_unique structure. 91 1.3.4.2 tls * \return zero on success or a negative number on failure. 92 1.3.4.2 tls * 93 1.3.4.2 tls * Copies the bus id from userspace into drm_device::unique, and verifies that 94 1.3.4.2 tls * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated 95 1.3.4.2 tls * in interface version 1.1 and will return EBUSY when setversion has requested 96 1.3.4.2 tls * version 1.1 or greater. 97 1.3.4.2 tls */ 98 1.3.4.2 tls int drm_setunique(struct drm_device *dev, void *data, 99 1.3.4.2 tls struct drm_file *file_priv) 100 1.3.4.2 tls { 101 1.3.4.2 tls struct drm_unique *u = data; 102 1.3.4.2 tls struct drm_master *master = file_priv->master; 103 1.3.4.2 tls int ret; 104 1.3.4.2 tls 105 1.3.4.2 tls if (master->unique_len || master->unique) 106 1.3.4.2 tls return -EBUSY; 107 1.3.4.2 tls 108 1.3.4.2 tls if (!u->unique_len || u->unique_len > 1024) 109 1.3.4.2 tls return -EINVAL; 110 1.3.4.2 tls 111 1.3.4.2 tls if (!dev->driver->bus->set_unique) 112 1.3.4.2 tls return -EINVAL; 113 1.3.4.2 tls 114 1.3.4.2 tls ret = dev->driver->bus->set_unique(dev, master, u); 115 1.3.4.2 tls if (ret) 116 1.3.4.2 tls goto err; 117 1.3.4.2 tls 118 1.3.4.2 tls return 0; 119 1.3.4.2 tls 120 1.3.4.2 tls err: 121 1.3.4.2 tls drm_unset_busid(dev, master); 122 1.3.4.2 tls return ret; 123 1.3.4.2 tls } 124 1.3.4.2 tls 125 1.3.4.2 tls static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) 126 1.3.4.2 tls { 127 1.3.4.2 tls struct drm_master *master = file_priv->master; 128 1.3.4.2 tls int ret; 129 1.3.4.2 tls 130 1.3.4.2 tls if (master->unique != NULL) 131 1.3.4.2 tls drm_unset_busid(dev, master); 132 1.3.4.2 tls 133 1.3.4.2 tls ret = dev->driver->bus->set_busid(dev, master); 134 1.3.4.2 tls if (ret) 135 1.3.4.2 tls goto err; 136 1.3.4.2 tls return 0; 137 1.3.4.2 tls err: 138 1.3.4.2 tls drm_unset_busid(dev, master); 139 1.3.4.2 tls return ret; 140 1.3.4.2 tls } 141 1.3.4.2 tls 142 1.3.4.2 tls /** 143 1.3.4.2 tls * Get a mapping information. 144 1.3.4.2 tls * 145 1.3.4.2 tls * \param inode device inode. 146 1.3.4.2 tls * \param file_priv DRM file private. 147 1.3.4.2 tls * \param cmd command. 148 1.3.4.2 tls * \param arg user argument, pointing to a drm_map structure. 149 1.3.4.2 tls * 150 1.3.4.2 tls * \return zero on success or a negative number on failure. 151 1.3.4.2 tls * 152 1.3.4.2 tls * Searches for the mapping with the specified offset and copies its information 153 1.3.4.2 tls * into userspace 154 1.3.4.2 tls */ 155 1.3.4.2 tls int drm_getmap(struct drm_device *dev, void *data, 156 1.3.4.2 tls struct drm_file *file_priv) 157 1.3.4.2 tls { 158 1.3.4.2 tls struct drm_map *map = data; 159 1.3.4.2 tls struct drm_map_list *r_list = NULL; 160 1.3.4.2 tls struct list_head *list; 161 1.3.4.2 tls int idx; 162 1.3.4.2 tls int i; 163 1.3.4.2 tls 164 1.3.4.2 tls idx = map->offset; 165 1.3.4.2 tls if (idx < 0) 166 1.3.4.2 tls return -EINVAL; 167 1.3.4.2 tls 168 1.3.4.2 tls i = 0; 169 1.3.4.2 tls mutex_lock(&dev->struct_mutex); 170 1.3.4.2 tls list_for_each(list, &dev->maplist) { 171 1.3.4.2 tls if (i == idx) { 172 1.3.4.2 tls r_list = list_entry(list, struct drm_map_list, head); 173 1.3.4.2 tls break; 174 1.3.4.2 tls } 175 1.3.4.2 tls i++; 176 1.3.4.2 tls } 177 1.3.4.2 tls if (!r_list || !r_list->map) { 178 1.3.4.2 tls mutex_unlock(&dev->struct_mutex); 179 1.3.4.2 tls return -EINVAL; 180 1.3.4.2 tls } 181 1.3.4.2 tls 182 1.3.4.2 tls map->offset = r_list->map->offset; 183 1.3.4.2 tls map->size = r_list->map->size; 184 1.3.4.2 tls map->type = r_list->map->type; 185 1.3.4.2 tls map->flags = r_list->map->flags; 186 1.3.4.2 tls map->handle = (void *)(unsigned long) r_list->user_token; 187 1.3.4.2 tls 188 1.3.4.2 tls #ifdef CONFIG_X86 189 1.3.4.2 tls /* 190 1.3.4.2 tls * There appears to be exactly one user of the mtrr index: dritest. 191 1.3.4.2 tls * It's easy enough to keep it working on non-PAT systems. 192 1.3.4.2 tls */ 193 1.3.4.2 tls map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr); 194 1.3.4.2 tls #else 195 1.3.4.2 tls map->mtrr = -1; 196 1.3.4.2 tls #endif 197 1.3.4.2 tls 198 1.3.4.2 tls mutex_unlock(&dev->struct_mutex); 199 1.3.4.2 tls 200 1.3.4.2 tls return 0; 201 1.3.4.2 tls } 202 1.3.4.2 tls 203 1.3.4.2 tls /** 204 1.3.4.2 tls * Get client information. 205 1.3.4.2 tls * 206 1.3.4.2 tls * \param inode device inode. 207 1.3.4.2 tls * \param file_priv DRM file private. 208 1.3.4.2 tls * \param cmd command. 209 1.3.4.2 tls * \param arg user argument, pointing to a drm_client structure. 210 1.3.4.2 tls * 211 1.3.4.2 tls * \return zero on success or a negative number on failure. 212 1.3.4.2 tls * 213 1.3.4.2 tls * Searches for the client with the specified index and copies its information 214 1.3.4.2 tls * into userspace 215 1.3.4.2 tls */ 216 1.3.4.2 tls int drm_getclient(struct drm_device *dev, void *data, 217 1.3.4.2 tls struct drm_file *file_priv) 218 1.3.4.2 tls { 219 1.3.4.2 tls struct drm_client *client = data; 220 1.3.4.2 tls 221 1.3.4.2 tls /* 222 1.3.4.2 tls * Hollowed-out getclient ioctl to keep some dead old drm tests/tools 223 1.3.4.2 tls * not breaking completely. Userspace tools stop enumerating one they 224 1.3.4.2 tls * get -EINVAL, hence this is the return value we need to hand back for 225 1.3.4.2 tls * no clients tracked. 226 1.3.4.2 tls * 227 1.3.4.2 tls * Unfortunately some clients (*cough* libva *cough*) use this in a fun 228 1.3.4.2 tls * attempt to figure out whether they're authenticated or not. Since 229 1.3.4.2 tls * that's the only thing they care about, give it to the directly 230 1.3.4.2 tls * instead of walking one giant list. 231 1.3.4.2 tls */ 232 1.3.4.2 tls if (client->idx == 0) { 233 1.3.4.2 tls client->auth = file_priv->authenticated; 234 1.3.4.2 tls #ifdef __NetBSD__ /* XXX Too scary to contemplate. */ 235 1.3.4.3 jdolecek client->pid = curproc->p_pid; 236 1.3.4.3 jdolecek client->uid = kauth_cred_geteuid(curproc->p_cred); 237 1.3.4.2 tls #else 238 1.3.4.2 tls client->pid = pid_vnr(file_priv->pid); 239 1.3.4.2 tls client->uid = from_kuid_munged(current_user_ns(), 240 1.3.4.2 tls file_priv->uid); 241 1.3.4.2 tls #endif 242 1.3.4.2 tls client->magic = 0; 243 1.3.4.2 tls client->iocs = 0; 244 1.3.4.2 tls 245 1.3.4.2 tls return 0; 246 1.3.4.2 tls } else { 247 1.3.4.2 tls return -EINVAL; 248 1.3.4.2 tls } 249 1.3.4.2 tls } 250 1.3.4.2 tls 251 1.3.4.2 tls /** 252 1.3.4.2 tls * Get statistics information. 253 1.3.4.2 tls * 254 1.3.4.2 tls * \param inode device inode. 255 1.3.4.2 tls * \param file_priv DRM file private. 256 1.3.4.2 tls * \param cmd command. 257 1.3.4.2 tls * \param arg user argument, pointing to a drm_stats structure. 258 1.3.4.2 tls * 259 1.3.4.2 tls * \return zero on success or a negative number on failure. 260 1.3.4.2 tls */ 261 1.3.4.2 tls int drm_getstats(struct drm_device *dev, void *data, 262 1.3.4.2 tls struct drm_file *file_priv) 263 1.3.4.2 tls { 264 1.3.4.2 tls struct drm_stats *stats = data; 265 1.3.4.2 tls 266 1.3.4.2 tls /* Clear stats to prevent userspace from eating its stack garbage. */ 267 1.3.4.2 tls memset(stats, 0, sizeof(*stats)); 268 1.3.4.2 tls 269 1.3.4.2 tls return 0; 270 1.3.4.2 tls } 271 1.3.4.2 tls 272 1.3.4.2 tls /** 273 1.3.4.2 tls * Get device/driver capabilities 274 1.3.4.2 tls */ 275 1.3.4.2 tls int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) 276 1.3.4.2 tls { 277 1.3.4.2 tls struct drm_get_cap *req = data; 278 1.3.4.2 tls 279 1.3.4.2 tls req->value = 0; 280 1.3.4.2 tls switch (req->capability) { 281 1.3.4.2 tls case DRM_CAP_DUMB_BUFFER: 282 1.3.4.2 tls if (dev->driver->dumb_create) 283 1.3.4.2 tls req->value = 1; 284 1.3.4.2 tls break; 285 1.3.4.2 tls case DRM_CAP_VBLANK_HIGH_CRTC: 286 1.3.4.2 tls req->value = 1; 287 1.3.4.2 tls break; 288 1.3.4.2 tls case DRM_CAP_DUMB_PREFERRED_DEPTH: 289 1.3.4.2 tls req->value = dev->mode_config.preferred_depth; 290 1.3.4.2 tls break; 291 1.3.4.2 tls case DRM_CAP_DUMB_PREFER_SHADOW: 292 1.3.4.2 tls req->value = dev->mode_config.prefer_shadow; 293 1.3.4.2 tls break; 294 1.3.4.2 tls case DRM_CAP_PRIME: 295 1.3.4.2 tls req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0; 296 1.3.4.2 tls req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0; 297 1.3.4.2 tls break; 298 1.3.4.2 tls case DRM_CAP_TIMESTAMP_MONOTONIC: 299 1.3.4.2 tls req->value = drm_timestamp_monotonic; 300 1.3.4.2 tls break; 301 1.3.4.2 tls case DRM_CAP_ASYNC_PAGE_FLIP: 302 1.3.4.2 tls req->value = dev->mode_config.async_page_flip; 303 1.3.4.2 tls break; 304 1.3.4.2 tls case DRM_CAP_CURSOR_WIDTH: 305 1.3.4.2 tls if (dev->mode_config.cursor_width) 306 1.3.4.2 tls req->value = dev->mode_config.cursor_width; 307 1.3.4.2 tls else 308 1.3.4.2 tls req->value = 64; 309 1.3.4.2 tls break; 310 1.3.4.2 tls case DRM_CAP_CURSOR_HEIGHT: 311 1.3.4.2 tls if (dev->mode_config.cursor_height) 312 1.3.4.2 tls req->value = dev->mode_config.cursor_height; 313 1.3.4.2 tls else 314 1.3.4.2 tls req->value = 64; 315 1.3.4.2 tls break; 316 1.3.4.2 tls default: 317 1.3.4.2 tls return -EINVAL; 318 1.3.4.2 tls } 319 1.3.4.2 tls return 0; 320 1.3.4.2 tls } 321 1.3.4.2 tls 322 1.3.4.2 tls /** 323 1.3.4.2 tls * Set device/driver capabilities 324 1.3.4.2 tls */ 325 1.3.4.2 tls int 326 1.3.4.2 tls drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) 327 1.3.4.2 tls { 328 1.3.4.2 tls struct drm_set_client_cap *req = data; 329 1.3.4.2 tls 330 1.3.4.2 tls switch (req->capability) { 331 1.3.4.2 tls case DRM_CLIENT_CAP_STEREO_3D: 332 1.3.4.2 tls if (req->value > 1) 333 1.3.4.2 tls return -EINVAL; 334 1.3.4.2 tls file_priv->stereo_allowed = req->value; 335 1.3.4.2 tls break; 336 1.3.4.2 tls case DRM_CLIENT_CAP_UNIVERSAL_PLANES: 337 1.3.4.2 tls if (!drm_universal_planes) 338 1.3.4.2 tls return -EINVAL; 339 1.3.4.2 tls if (req->value > 1) 340 1.3.4.2 tls return -EINVAL; 341 1.3.4.2 tls file_priv->universal_planes = req->value; 342 1.3.4.2 tls break; 343 1.3.4.2 tls default: 344 1.3.4.2 tls return -EINVAL; 345 1.3.4.2 tls } 346 1.3.4.2 tls 347 1.3.4.2 tls return 0; 348 1.3.4.2 tls } 349 1.3.4.2 tls 350 1.3.4.2 tls /** 351 1.3.4.2 tls * Setversion ioctl. 352 1.3.4.2 tls * 353 1.3.4.2 tls * \param inode device inode. 354 1.3.4.2 tls * \param file_priv DRM file private. 355 1.3.4.2 tls * \param cmd command. 356 1.3.4.2 tls * \param arg user argument, pointing to a drm_lock structure. 357 1.3.4.2 tls * \return zero on success or negative number on failure. 358 1.3.4.2 tls * 359 1.3.4.2 tls * Sets the requested interface version 360 1.3.4.2 tls */ 361 1.3.4.2 tls int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) 362 1.3.4.2 tls { 363 1.3.4.2 tls struct drm_set_version *sv = data; 364 1.3.4.2 tls int if_version, retcode = 0; 365 1.3.4.2 tls 366 1.3.4.2 tls if (sv->drm_di_major != -1) { 367 1.3.4.2 tls if (sv->drm_di_major != DRM_IF_MAJOR || 368 1.3.4.2 tls sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { 369 1.3.4.2 tls retcode = -EINVAL; 370 1.3.4.2 tls goto done; 371 1.3.4.2 tls } 372 1.3.4.2 tls if_version = DRM_IF_VERSION(sv->drm_di_major, 373 1.3.4.2 tls sv->drm_di_minor); 374 1.3.4.2 tls dev->if_version = max(if_version, dev->if_version); 375 1.3.4.2 tls if (sv->drm_di_minor >= 1) { 376 1.3.4.2 tls /* 377 1.3.4.2 tls * Version 1.1 includes tying of DRM to specific device 378 1.3.4.2 tls * Version 1.4 has proper PCI domain support 379 1.3.4.2 tls */ 380 1.3.4.2 tls retcode = drm_set_busid(dev, file_priv); 381 1.3.4.2 tls if (retcode) 382 1.3.4.2 tls goto done; 383 1.3.4.2 tls } 384 1.3.4.2 tls } 385 1.3.4.2 tls 386 1.3.4.2 tls if (sv->drm_dd_major != -1) { 387 1.3.4.2 tls if (sv->drm_dd_major != dev->driver->major || 388 1.3.4.2 tls sv->drm_dd_minor < 0 || sv->drm_dd_minor > 389 1.3.4.2 tls dev->driver->minor) { 390 1.3.4.2 tls retcode = -EINVAL; 391 1.3.4.2 tls goto done; 392 1.3.4.2 tls } 393 1.3.4.2 tls } 394 1.3.4.2 tls 395 1.3.4.2 tls done: 396 1.3.4.2 tls sv->drm_di_major = DRM_IF_MAJOR; 397 1.3.4.2 tls sv->drm_di_minor = DRM_IF_MINOR; 398 1.3.4.2 tls sv->drm_dd_major = dev->driver->major; 399 1.3.4.2 tls sv->drm_dd_minor = dev->driver->minor; 400 1.3.4.2 tls 401 1.3.4.2 tls return retcode; 402 1.3.4.2 tls } 403 1.3.4.2 tls 404 1.3.4.2 tls /** No-op ioctl. */ 405 1.3.4.2 tls int drm_noop(struct drm_device *dev, void *data, 406 1.3.4.2 tls struct drm_file *file_priv) 407 1.3.4.2 tls { 408 1.3.4.2 tls DRM_DEBUG("\n"); 409 1.3.4.2 tls return 0; 410 1.3.4.2 tls } 411 1.3.4.2 tls EXPORT_SYMBOL(drm_noop); 412
Indexes created Sun Oct 19 02:09:48 GMT 2025