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 * 8 * Author Rickard E. (Rik) Faith <faith@valinux.com> 9 * Author Gareth Hughes <gareth@valinux.com> 10 * 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 31 #include <sys/devfs.h> 32 33 #include <drm/drmP.h> 34 #include <drm/drm_core.h> 35 #include "drm_legacy.h" 36 37 #include <linux/export.h> 38 39 static int drm_version(struct drm_device *dev, void *data, 40 struct drm_file *file_priv); 41 42 #define DRM_IOCTL_DEF(ioctl, _func, _flags) \ 43 [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl} 44 45 /** Ioctl table */ 46 static const struct drm_ioctl_desc drm_ioctls[] = { 47 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED), 48 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), 49 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0), 50 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), 51 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED), 52 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED), 53 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED), 54 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED), 55 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER), 56 57 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 58 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 59 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 60 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER), 61 62 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 63 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH), 64 65 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 66 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH), 67 68 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY), 69 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY), 70 71 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY), 72 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 73 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 74 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH), 75 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 76 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 77 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH), 78 79 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 80 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 81 82 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH), 83 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH), 84 85 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), 86 87 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_legacy_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 88 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_legacy_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 89 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_legacy_infobufs, DRM_AUTH), 90 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_legacy_mapbufs, DRM_AUTH), 91 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_legacy_freebufs, DRM_AUTH), 92 DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_legacy_dma_ioctl, DRM_AUTH), 93 94 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 95 96 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 97 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 98 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 99 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), 100 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 101 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 102 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 103 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 104 105 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_legacy_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 106 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_legacy_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 107 108 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED), 109 110 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), 111 112 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 113 114 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED), 115 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED), 116 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED), 117 118 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 119 120 #if 0 121 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED), 122 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED), 123 #endif 124 125 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 126 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 127 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 128 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 129 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 130 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 131 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED), 132 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED), 133 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 134 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 135 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 136 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 137 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 138 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 139 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 140 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 141 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 142 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 146 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 147 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 148 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 149 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 150 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 151 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 152 }; 153 154 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) 155 156 /** 157 * Get the bus id. 158 * 159 * \param inode device inode. 160 * \param file_priv DRM file private. 161 * \param cmd command. 162 * \param arg user argument, pointing to a drm_unique structure. 163 * \return zero on success or a negative number on failure. 164 * 165 * Copies the bus id from drm_device::unique into user space. 166 */ 167 int drm_getunique(struct drm_device *dev, void *data, 168 struct drm_file *file_priv) 169 { 170 struct drm_unique *u = data; 171 172 if (u->unique_len >= dev->unique_len) { 173 if (copy_to_user(u->unique, dev->unique, dev->unique_len)) 174 return -EFAULT; 175 } 176 u->unique_len = dev->unique_len; 177 178 return 0; 179 } 180 181 /** 182 * Set the bus id. 183 * 184 * \param inode device inode. 185 * \param file_priv DRM file private. 186 * \param cmd command. 187 * \param arg user argument, pointing to a drm_unique structure. 188 * \return zero on success or a negative number on failure. 189 * 190 * Copies the bus id from userspace into drm_device::unique, and verifies that 191 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated 192 * in interface version 1.1 and will return EBUSY when setversion has requested 193 * version 1.1 or greater. 194 */ 195 int drm_setunique(struct drm_device *dev, void *data, 196 struct drm_file *file_priv) 197 { 198 struct drm_unique *u = data; 199 int domain, bus, slot, func, ret; 200 char *busid; 201 202 /* Check and copy in the submitted Bus ID */ 203 if (!u->unique_len || u->unique_len > 1024) 204 return -EINVAL; 205 206 busid = kmalloc(u->unique_len + 1, M_DRM, M_WAITOK); 207 if (busid == NULL) 208 return -ENOMEM; 209 210 if (copy_from_user(busid, u->unique, u->unique_len)) { 211 drm_free(busid, M_DRM); 212 return -EFAULT; 213 } 214 busid[u->unique_len] = '\0'; 215 216 /* Return error if the busid submitted doesn't match the device's actual 217 * busid. 218 */ 219 ret = ksscanf(busid, "PCI:%d:%d:%d", &bus, &slot, &func); 220 if (ret != 3) { 221 drm_free(busid, M_DRM); 222 return -EINVAL; 223 } 224 domain = bus >> 8; 225 bus &= 0xff; 226 227 if ((domain != dev->pci_domain) || 228 (bus != dev->pci_bus) || 229 (slot != dev->pci_slot) || 230 (func != dev->pci_func)) { 231 drm_free(busid, M_DRM); 232 return -EINVAL; 233 } 234 235 /* Actually set the device's busid now. */ 236 DRM_LOCK(dev); 237 if (dev->unique_len || dev->unique) { 238 DRM_UNLOCK(dev); 239 return -EBUSY; 240 } 241 242 dev->unique_len = u->unique_len; 243 dev->unique = busid; 244 DRM_UNLOCK(dev); 245 246 return 0; 247 } 248 249 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) 250 { 251 252 DRM_LOCK(dev); 253 254 dev->unique_len = 20; 255 dev->unique = kmalloc(dev->unique_len + 1, M_DRM, M_WAITOK | M_NULLOK); 256 if (dev->unique == NULL) { 257 DRM_UNLOCK(dev); 258 return -ENOMEM; 259 } 260 261 ksnprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%1x", 262 dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func); 263 264 DRM_UNLOCK(dev); 265 266 return 0; 267 } 268 269 /** 270 * Get a mapping information. 271 * 272 * \param inode device inode. 273 * \param file_priv DRM file private. 274 * \param cmd command. 275 * \param arg user argument, pointing to a drm_map structure. 276 * 277 * \return zero on success or a negative number on failure. 278 * 279 * Searches for the mapping with the specified offset and copies its information 280 * into userspace 281 */ 282 int drm_getmap(struct drm_device *dev, void *data, 283 struct drm_file *file_priv) 284 { 285 struct drm_map *map = data; 286 struct drm_map_list *r_list = NULL; 287 struct list_head *list; 288 int idx; 289 int i; 290 291 idx = map->offset; 292 if (idx < 0) { 293 return -EINVAL; 294 } 295 296 i = 0; 297 DRM_LOCK(dev); 298 list_for_each(list, &dev->maplist) { 299 if (i == idx) { 300 r_list = list_entry(list, struct drm_map_list, head); 301 break; 302 } 303 i++; 304 } 305 if (!r_list || !r_list->map) { 306 DRM_UNLOCK(dev); 307 return -EINVAL; 308 } 309 310 map->offset = r_list->map->offset; 311 map->size = r_list->map->size; 312 map->type = r_list->map->type; 313 map->flags = r_list->map->flags; 314 map->handle = r_list->map->handle; 315 map->mtrr = r_list->map->mtrr; 316 DRM_UNLOCK(dev); 317 318 return 0; 319 } 320 321 /** 322 * Get client information. 323 * 324 * \param inode device inode. 325 * \param file_priv DRM file private. 326 * \param cmd command. 327 * \param arg user argument, pointing to a drm_client structure. 328 * 329 * \return zero on success or a negative number on failure. 330 * 331 * Searches for the client with the specified index and copies its information 332 * into userspace 333 */ 334 int drm_getclient(struct drm_device *dev, void *data, 335 struct drm_file *file_priv) 336 { 337 struct drm_client *client = data; 338 struct drm_file *pt; 339 int idx; 340 int i = 0; 341 342 idx = client->idx; 343 DRM_LOCK(dev); 344 list_for_each_entry(pt, &dev->filelist, lhead) { 345 if (i++ >= idx) { 346 client->auth = pt->authenticated; 347 client->pid = pt->pid; 348 client->uid = pt->uid; 349 client->magic = pt->magic; 350 client->iocs = pt->ioctl_count; 351 DRM_UNLOCK(dev); 352 353 return 0; 354 } 355 } 356 DRM_UNLOCK(dev); 357 358 return -EINVAL; 359 } 360 361 /** 362 * Get statistics information. 363 * 364 * \param inode device inode. 365 * \param file_priv DRM file private. 366 * \param cmd command. 367 * \param arg user argument, pointing to a drm_stats structure. 368 * 369 * \return zero on success or a negative number on failure. 370 */ 371 int drm_getstats(struct drm_device *dev, void *data, struct drm_file *file_priv) 372 { 373 struct drm_stats *stats = data; 374 int i; 375 376 memset(stats, 0, sizeof(struct drm_stats)); 377 378 DRM_LOCK(dev); 379 380 for (i = 0; i < dev->counters; i++) { 381 if (dev->types[i] == _DRM_STAT_LOCK) 382 stats->data[i].value = 383 (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0); 384 else 385 stats->data[i].value = atomic_read(&dev->counts[i]); 386 stats->data[i].type = dev->types[i]; 387 } 388 389 stats->count = dev->counters; 390 391 DRM_UNLOCK(dev); 392 393 return 0; 394 } 395 396 /** 397 * Get device/driver capabilities 398 */ 399 int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) 400 { 401 struct drm_get_cap *req = data; 402 403 req->value = 0; 404 switch (req->capability) { 405 case DRM_CAP_DUMB_BUFFER: 406 if (dev->driver->dumb_create) 407 req->value = 1; 408 break; 409 case DRM_CAP_VBLANK_HIGH_CRTC: 410 req->value = 1; 411 break; 412 case DRM_CAP_DUMB_PREFERRED_DEPTH: 413 req->value = dev->mode_config.preferred_depth; 414 break; 415 case DRM_CAP_DUMB_PREFER_SHADOW: 416 req->value = dev->mode_config.prefer_shadow; 417 break; 418 case DRM_CAP_TIMESTAMP_MONOTONIC: 419 req->value = drm_timestamp_monotonic; 420 break; 421 case DRM_CAP_CURSOR_WIDTH: 422 if (dev->mode_config.cursor_width) 423 req->value = dev->mode_config.cursor_width; 424 else 425 req->value = 64; 426 break; 427 case DRM_CAP_CURSOR_HEIGHT: 428 if (dev->mode_config.cursor_height) 429 req->value = dev->mode_config.cursor_height; 430 else 431 req->value = 64; 432 break; 433 default: 434 return -EINVAL; 435 } 436 return 0; 437 } 438 439 /** 440 * Set device/driver capabilities 441 */ 442 int 443 drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) 444 { 445 struct drm_set_client_cap *req = data; 446 447 switch (req->capability) { 448 case DRM_CLIENT_CAP_STEREO_3D: 449 if (req->value > 1) 450 return -EINVAL; 451 file_priv->stereo_allowed = req->value; 452 break; 453 case DRM_CLIENT_CAP_UNIVERSAL_PLANES: 454 if (req->value > 1) 455 return -EINVAL; 456 file_priv->universal_planes = req->value; 457 break; 458 default: 459 return -EINVAL; 460 } 461 462 return 0; 463 } 464 465 /** 466 * Setversion ioctl. 467 * 468 * \param inode device inode. 469 * \param file_priv DRM file private. 470 * \param cmd command. 471 * \param arg user argument, pointing to a drm_lock structure. 472 * \return zero on success or negative number on failure. 473 * 474 * Sets the requested interface version 475 */ 476 int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) 477 { 478 struct drm_set_version *sv = data; 479 struct drm_set_version ver; 480 int if_version, retcode = 0; 481 482 /* Save the incoming data, and set the response before continuing 483 * any further. 484 */ 485 ver = *sv; 486 sv->drm_di_major = DRM_IF_MAJOR; 487 sv->drm_di_minor = DRM_IF_MINOR; 488 sv->drm_dd_major = dev->driver->major; 489 sv->drm_dd_minor = dev->driver->minor; 490 491 if (ver.drm_di_major != -1) { 492 if (ver.drm_di_major != DRM_IF_MAJOR || 493 ver.drm_di_minor < 0 || ver.drm_di_minor > DRM_IF_MINOR) { 494 return -EINVAL; 495 } 496 if_version = DRM_IF_VERSION(ver.drm_di_major, 497 ver.drm_dd_minor); 498 dev->if_version = DRM_MAX(if_version, dev->if_version); 499 if (ver.drm_di_minor >= 1) { 500 /* 501 * Version 1.1 includes tying of DRM to specific device 502 * Version 1.4 has proper PCI domain support 503 */ 504 retcode = drm_set_busid(dev, file_priv); 505 if (retcode) 506 return retcode; 507 } 508 } 509 510 if (ver.drm_dd_major != -1) { 511 if (ver.drm_dd_major != dev->driver->major || 512 ver.drm_dd_minor < 0 || 513 ver.drm_dd_minor > dev->driver->minor) 514 { 515 return -EINVAL; 516 } 517 } 518 519 return 0; 520 } 521 522 /** No-op ioctl. */ 523 int drm_noop(struct drm_device *dev, void *data, 524 struct drm_file *file_priv) 525 { 526 DRM_DEBUG("\n"); 527 return 0; 528 } 529 EXPORT_SYMBOL(drm_noop); 530 531 /** 532 * Copy and IOCTL return string to user space 533 */ 534 static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value) 535 { 536 int len; 537 538 /* don't overflow userbuf */ 539 len = strlen(value); 540 if (len > *buf_len) 541 len = *buf_len; 542 543 /* let userspace know exact length of driver value (which could be 544 * larger than the userspace-supplied buffer) */ 545 *buf_len = strlen(value); 546 547 /* finally, try filling in the userbuf */ 548 if (len && buf) 549 if (copy_to_user(buf, value, len)) 550 return -EFAULT; 551 return 0; 552 } 553 554 /** 555 * Get version information 556 * 557 * \param inode device inode. 558 * \param filp file pointer. 559 * \param cmd command. 560 * \param arg user argument, pointing to a drm_version structure. 561 * \return zero on success or negative number on failure. 562 * 563 * Fills in the version information in \p arg. 564 */ 565 static int drm_version(struct drm_device *dev, void *data, 566 struct drm_file *file_priv) 567 { 568 struct drm_version *version = data; 569 int err; 570 571 version->version_major = dev->driver->major; 572 version->version_minor = dev->driver->minor; 573 version->version_patchlevel = dev->driver->patchlevel; 574 err = drm_copy_field(version->name, &version->name_len, 575 dev->driver->name); 576 if (!err) 577 err = drm_copy_field(version->date, &version->date_len, 578 dev->driver->date); 579 if (!err) 580 err = drm_copy_field(version->desc, &version->desc_len, 581 dev->driver->desc); 582 583 return err; 584 } 585 586 /** 587 * drm_ioctl_permit - Check ioctl permissions against caller 588 * 589 * @flags: ioctl permission flags. 590 * @file_priv: Pointer to struct drm_file identifying the caller. 591 * 592 * Checks whether the caller is allowed to run an ioctl with the 593 * indicated permissions. If so, returns zero. Otherwise returns an 594 * error code suitable for ioctl return. 595 */ 596 #if 0 597 static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv) 598 { 599 /* ROOT_ONLY is only for CAP_SYS_ADMIN */ 600 if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN))) 601 return -EACCES; 602 603 /* AUTH is only for authenticated or render client */ 604 if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) && 605 !file_priv->authenticated)) 606 return -EACCES; 607 608 /* MASTER is only for master or control clients */ 609 if (unlikely((flags & DRM_MASTER) && !file_priv->is_master && 610 !drm_is_control_client(file_priv))) 611 return -EACCES; 612 613 /* Control clients must be explicitly allowed */ 614 if (unlikely(!(flags & DRM_CONTROL_ALLOW) && 615 drm_is_control_client(file_priv))) 616 return -EACCES; 617 618 /* Render clients must be explicitly allowed */ 619 if (unlikely(!(flags & DRM_RENDER_ALLOW) && 620 drm_is_render_client(file_priv))) 621 return -EACCES; 622 623 return 0; 624 } 625 #endif 626 627 /** 628 * Called whenever a process performs an ioctl on /dev/drm. 629 * 630 * \param inode device inode. 631 * \param file_priv DRM file private. 632 * \param cmd command. 633 * \param arg user argument. 634 * \return zero on success or negative number on failure. 635 * 636 * Looks up the ioctl function in the ::ioctls table, checking for root 637 * previleges if so required, and dispatches to the respective function. 638 */ 639 int drm_ioctl(struct dev_ioctl_args *ap) 640 { 641 struct cdev *kdev = ap->a_head.a_dev; 642 struct drm_device *dev; 643 const struct drm_ioctl_desc *ioctl = NULL; 644 u_long cmd = ap->a_cmd; 645 unsigned int nr = DRM_IOCTL_NR(cmd); 646 int retcode = 0; 647 caddr_t data = ap->a_data; 648 int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv); 649 int is_driver_ioctl = 0; 650 struct drm_file *file_priv; 651 652 dev = drm_get_device_from_kdev(kdev); 653 654 retcode = devfs_get_cdevpriv(ap->a_fp, (void **)&file_priv); 655 if (retcode !=0) { 656 DRM_ERROR("can't find authenticator\n"); 657 return EINVAL; 658 } 659 660 atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]); 661 662 if (drm_device_is_unplugged(dev)) 663 return ENODEV; 664 665 if (IOCGROUP(cmd) != DRM_IOCTL_BASE) { 666 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd)); 667 return EINVAL; 668 } 669 670 ioctl = &drm_ioctls[nr]; 671 /* It's not a core DRM ioctl, try driver-specific. */ 672 if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) { 673 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */ 674 nr -= DRM_COMMAND_BASE; 675 if (nr >= dev->driver->num_ioctls) { 676 return EINVAL; 677 } 678 ioctl = &dev->driver->ioctls[nr]; 679 is_driver_ioctl = 1; 680 } 681 682 DRM_DEBUG_VERBOSE("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n", 683 DRM_CURRENTPID, cmd, nr, (long)dev->dev, 684 file_priv->authenticated); 685 686 /* Do not trust userspace, use our own definition */ 687 func = ioctl->func; 688 689 if (func == NULL) { 690 DRM_DEBUG("no function\n"); 691 return EINVAL; 692 } 693 694 if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) || 695 ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) || 696 ((ioctl->flags & DRM_MASTER) && !file_priv->master)) 697 return EACCES; 698 699 if (is_driver_ioctl) { 700 if ((ioctl->flags & DRM_UNLOCKED) == 0) 701 mutex_lock(&drm_global_mutex); 702 /* shared code returns -errno */ 703 retcode = -func(dev, data, file_priv); 704 if (retcode == ERESTARTSYS) 705 retcode = EINTR; 706 if ((ioctl->flags & DRM_UNLOCKED) == 0) 707 mutex_unlock(&drm_global_mutex); 708 } else { 709 retcode = -func(dev, data, file_priv); 710 if (retcode == ERESTARTSYS) 711 retcode = EINTR; 712 } 713 714 if (!ioctl) 715 DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02lx, nr=0x%02x\n", 716 DRM_CURRENTPID, 717 (long)dev->dev, 718 file_priv->authenticated, cmd, nr); 719 720 if (retcode) 721 DRM_DEBUG("ret = %d\n", retcode); 722 return retcode; 723 } 724 725 /** 726 * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags 727 * 728 * @nr: Ioctl number. 729 * @flags: Where to return the ioctl permission flags 730 */ 731 bool drm_ioctl_flags(unsigned int nr, unsigned int *flags) 732 { 733 if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) || 734 (nr < DRM_COMMAND_BASE)) { 735 *flags = drm_ioctls[nr].flags; 736 return true; 737 } 738 739 return false; 740 } 741 EXPORT_SYMBOL(drm_ioctl_flags); 742