Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/drm2/drm_drv.c
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1 /** 2 * \file drm_drv.c 3 * Generic driver template 4 * 5 * \author Rickard E. (Rik) Faith <faith@valinux.com> 6 * \author Gareth Hughes <gareth@valinux.com> 7 * 8 * To use this template, you must at least define the following (samples 9 * given for the MGA driver): 10 * 11 * \code 12 * #define DRIVER_AUTHOR "VA Linux Systems, Inc." 13 * 14 * #define DRIVER_NAME "mga" 15 * #define DRIVER_DESC "Matrox G200/G400" 16 * #define DRIVER_DATE "20001127" 17 * 18 * #define drm_x mga_##x 19 * \endcode 20 */ 21 22 /* 23 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com 24 * 25 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. 26 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 27 * All Rights Reserved. 28 * 29 * Permission is hereby granted, free of charge, to any person obtaining a 30 * copy of this software and associated documentation files (the "Software"), 31 * to deal in the Software without restriction, including without limitation 32 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 33 * and/or sell copies of the Software, and to permit persons to whom the 34 * Software is furnished to do so, subject to the following conditions: 35 * 36 * The above copyright notice and this permission notice (including the next 37 * paragraph) shall be included in all copies or substantial portions of the 38 * Software. 39 * 40 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 41 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 42 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 43 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 44 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 45 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 46 * OTHER DEALINGS IN THE SOFTWARE. 47 */ 48 49 #include <sys/cdefs.h> 50 __FBSDID("$FreeBSD$"); 51 52 #include <sys/sysent.h> 53 54 #include <dev/drm2/drmP.h> 55 #include <dev/drm2/drm_core.h> 56 #include <dev/drm2/drm_global.h> 57 58 struct sx drm_global_mutex; 59 60 /** Ioctl table */ 61 static struct drm_ioctl_desc drm_ioctls[] = { 62 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED), 63 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), 64 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0), 65 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), 66 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED), 67 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED), 68 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED), 69 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED), 70 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER), 71 72 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 73 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 74 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 75 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER), 76 77 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 78 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH), 79 80 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 81 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH), 82 83 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY), 84 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY), 85 86 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY), 87 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 88 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 89 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH), 90 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 91 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 92 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH), 93 94 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 95 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 96 97 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH), 98 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH), 99 100 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), 101 102 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 103 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 104 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH), 105 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH), 106 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH), 107 /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */ 108 DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH), 109 110 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 111 112 #if __OS_HAS_AGP 113 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 114 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 115 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 116 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), 117 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 118 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 119 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 120 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 121 #endif 122 123 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 124 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 125 126 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED), 127 128 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), 129 130 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 131 132 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED), 133 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED), 134 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED), 135 136 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 137 138 #ifdef FREEBSD_NOTYET 139 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED), 140 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED), 141 #endif /* FREEBSD_NOTYET */ 142 143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 146 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 147 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 148 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 149 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED), 150 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED), 151 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 152 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 153 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 154 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 155 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 156 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 157 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 158 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 159 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 160 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 161 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 162 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 163 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 164 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 165 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 166 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 167 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 168 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 169 }; 170 171 #ifdef COMPAT_FREEBSD32 172 extern struct drm_ioctl_desc drm_compat_ioctls[]; 173 #endif 174 175 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) 176 177 /** 178 * Take down the DRM device. 179 * 180 * \param dev DRM device structure. 181 * 182 * Frees every resource in \p dev. 183 * 184 * \sa drm_device 185 */ 186 int drm_lastclose(struct drm_device * dev) 187 { 188 #ifdef __linux__ 189 struct drm_vma_entry *vma, *vma_temp; 190 #endif 191 192 DRM_DEBUG("\n"); 193 194 if (dev->driver->lastclose) 195 dev->driver->lastclose(dev); 196 DRM_DEBUG("driver lastclose completed\n"); 197 198 if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET)) 199 drm_irq_uninstall(dev); 200 201 DRM_LOCK(dev); 202 203 /* Clear AGP information */ 204 if (drm_core_has_AGP(dev) && dev->agp && 205 !drm_core_check_feature(dev, DRIVER_MODESET)) { 206 struct drm_agp_mem *entry, *tempe; 207 208 /* Remove AGP resources, but leave dev->agp 209 intact until drv_cleanup is called. */ 210 list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) { 211 if (entry->bound) 212 drm_unbind_agp(entry->memory); 213 drm_free_agp(entry->memory, entry->pages); 214 free(entry, DRM_MEM_AGPLISTS); 215 } 216 INIT_LIST_HEAD(&dev->agp->memory); 217 218 if (dev->agp->acquired) 219 drm_agp_release(dev); 220 221 dev->agp->acquired = 0; 222 dev->agp->enabled = 0; 223 } 224 if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg && 225 !drm_core_check_feature(dev, DRIVER_MODESET)) { 226 drm_sg_cleanup(dev->sg); 227 dev->sg = NULL; 228 } 229 230 #ifdef __linux__ 231 /* Clear vma list (only built for debugging) */ 232 list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { 233 list_del(&vma->head); 234 kfree(vma); 235 } 236 #endif 237 238 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && 239 !drm_core_check_feature(dev, DRIVER_MODESET)) 240 drm_dma_takedown(dev); 241 242 DRM_UNLOCK(dev); 243 244 DRM_DEBUG("lastclose completed\n"); 245 return 0; 246 } 247 248 #ifdef __linux__ 249 /** File operations structure */ 250 static const struct file_operations drm_stub_fops = { 251 .owner = THIS_MODULE, 252 .open = drm_stub_open, 253 .llseek = noop_llseek, 254 }; 255 #endif 256 257 static int __init drm_core_init(void) 258 { 259 260 sx_init(&drm_global_mutex, "drm_global_mutex"); 261 262 drm_global_init(); 263 264 #if DRM_LINUX 265 linux_ioctl_register_handler(&drm_handler); 266 #endif /* DRM_LINUX */ 267 268 DRM_INFO("Initialized %s %d.%d.%d %s\n", 269 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); 270 return 0; 271 } 272 273 static void __exit drm_core_exit(void) 274 { 275 276 #if DRM_LINUX 277 linux_ioctl_unregister_handler(&drm_handler); 278 #endif /* DRM_LINUX */ 279 280 drm_global_release(); 281 282 sx_destroy(&drm_global_mutex); 283 } 284 285 SYSINIT(drm_register, SI_SUB_KLD, SI_ORDER_MIDDLE, 286 drm_core_init, NULL); 287 SYSUNINIT(drm_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE, 288 drm_core_exit, NULL); 289 290 /** 291 * Copy and IOCTL return string to user space 292 */ 293 static int drm_copy_field(char *buf, size_t *buf_len, const char *value) 294 { 295 int len; 296 297 /* don't overflow userbuf */ 298 len = strlen(value); 299 if (len > *buf_len) 300 len = *buf_len; 301 302 /* let userspace know exact length of driver value (which could be 303 * larger than the userspace-supplied buffer) */ 304 *buf_len = strlen(value); 305 306 /* finally, try filling in the userbuf */ 307 if (len && buf) 308 if (copy_to_user(buf, value, len)) 309 return -EFAULT; 310 return 0; 311 } 312 313 /** 314 * Get version information 315 * 316 * \param inode device inode. 317 * \param filp file pointer. 318 * \param cmd command. 319 * \param arg user argument, pointing to a drm_version structure. 320 * \return zero on success or negative number on failure. 321 * 322 * Fills in the version information in \p arg. 323 */ 324 int drm_version(struct drm_device *dev, void *data, 325 struct drm_file *file_priv) 326 { 327 struct drm_version *version = data; 328 int err; 329 330 version->version_major = dev->driver->major; 331 version->version_minor = dev->driver->minor; 332 version->version_patchlevel = dev->driver->patchlevel; 333 err = drm_copy_field(version->name, &version->name_len, 334 dev->driver->name); 335 if (!err) 336 err = drm_copy_field(version->date, &version->date_len, 337 dev->driver->date); 338 if (!err) 339 err = drm_copy_field(version->desc, &version->desc_len, 340 dev->driver->desc); 341 342 return err; 343 } 344 345 /** 346 * Called whenever a process performs an ioctl on /dev/drm. 347 * 348 * \param inode device inode. 349 * \param file_priv DRM file private. 350 * \param cmd command. 351 * \param arg user argument. 352 * \return zero on success or negative number on failure. 353 * 354 * Looks up the ioctl function in the ::ioctls table, checking for root 355 * previleges if so required, and dispatches to the respective function. 356 */ 357 int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags, 358 DRM_STRUCTPROC *p) 359 { 360 struct drm_file *file_priv; 361 struct drm_device *dev; 362 struct drm_ioctl_desc *ioctl; 363 drm_ioctl_t *func; 364 unsigned int nr = DRM_IOCTL_NR(cmd); 365 int retcode; 366 367 dev = drm_get_device_from_kdev(kdev); 368 369 retcode = devfs_get_cdevpriv((void **)&file_priv); 370 if (retcode != 0) { 371 DRM_ERROR("can't find authenticator\n"); 372 return EINVAL; 373 } 374 375 retcode = -EINVAL; 376 377 atomic_inc(&dev->ioctl_count); 378 atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]); 379 ++file_priv->ioctl_count; 380 381 DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n", 382 DRM_CURRENTPID, cmd, nr, 383 (long)file_priv->minor->device, 384 file_priv->authenticated); 385 386 switch (cmd) { 387 case FIONBIO: 388 case FIOASYNC: 389 atomic_dec(&dev->ioctl_count); 390 return 0; 391 392 case FIOSETOWN: 393 atomic_dec(&dev->ioctl_count); 394 return fsetown(*(int *)data, &file_priv->minor->buf_sigio); 395 396 case FIOGETOWN: 397 atomic_dec(&dev->ioctl_count); 398 *(int *) data = fgetown(&file_priv->minor->buf_sigio); 399 return 0; 400 } 401 402 if (IOCGROUP(cmd) != DRM_IOCTL_BASE) { 403 atomic_dec(&dev->ioctl_count); 404 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd)); 405 return EINVAL; 406 } 407 408 if ((nr >= DRM_CORE_IOCTL_COUNT) && 409 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) 410 goto err_i1; 411 #ifdef COMPAT_FREEBSD32 412 if (SV_CURPROC_FLAG(SV_ILP32) && 413 (nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && 414 (nr < DRM_COMMAND_BASE + *dev->driver->num_compat_ioctls) && 415 (dev->driver->compat_ioctls[nr - DRM_COMMAND_BASE].func != NULL)) { 416 ioctl = &dev->driver->compat_ioctls[nr - DRM_COMMAND_BASE]; 417 } else 418 #endif 419 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && 420 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) { 421 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; 422 } 423 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) { 424 #ifdef COMPAT_FREEBSD32 425 /* 426 * Called whenever a 32-bit process running under a 64-bit 427 * kernel performs an ioctl on /dev/drm. 428 */ 429 if (SV_CURPROC_FLAG(SV_ILP32) && drm_compat_ioctls[nr].func != NULL) 430 /* 431 * Assume that ioctls without an explicit compat 432 * routine will just work. This may not always be a 433 * good assumption, but it's better than always 434 * failing. 435 */ 436 ioctl = &drm_compat_ioctls[nr]; 437 else 438 #endif 439 ioctl = &drm_ioctls[nr]; 440 } else 441 goto err_i1; 442 443 /* Do not trust userspace, use our own definition */ 444 func = ioctl->func; 445 /* is there a local override? */ 446 #ifdef FREEBSD_NOTYET 447 #ifdef COMPAT_FREEBSD32 448 if (SV_CURPROC_FLAG(SV_ILP32) && 449 (nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_compat_ioctl) 450 func = dev->driver->dma_compat_ioctl; 451 else 452 #endif 453 #endif /* FREEBSD_NOTYET */ 454 if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl) 455 func = dev->driver->dma_ioctl; 456 457 if (!func) { 458 DRM_DEBUG("no function\n"); 459 retcode = -EINVAL; 460 } else if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) || 461 ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) || 462 ((ioctl->flags & DRM_MASTER) && !file_priv->is_master) || 463 (!(ioctl->flags & DRM_CONTROL_ALLOW) && (file_priv->minor->type == DRM_MINOR_CONTROL))) { 464 retcode = -EACCES; 465 } else { 466 if (ioctl->flags & DRM_UNLOCKED) 467 retcode = func(dev, data, file_priv); 468 else { 469 sx_xlock(&drm_global_mutex); 470 retcode = func(dev, data, file_priv); 471 sx_xunlock(&drm_global_mutex); 472 } 473 } 474 475 err_i1: 476 atomic_dec(&dev->ioctl_count); 477 if (retcode == -ERESTARTSYS) { 478 /* 479 * FIXME: Find where in i915 ERESTARTSYS should be 480 * converted to EINTR. 481 */ 482 DRM_DEBUG("ret = %d -> %d\n", retcode, -EINTR); 483 retcode = -EINTR; 484 } 485 if (retcode) 486 DRM_DEBUG("ret = %d\n", retcode); 487 if (retcode != 0 && 488 (drm_debug & DRM_DEBUGBITS_FAILED_IOCTL) != 0) { 489 printf( 490 "pid %d, cmd 0x%02lx, nr 0x%02x, dev 0x%lx, auth %d, res %d\n", 491 DRM_CURRENTPID, cmd, nr, (long)file_priv->minor->device, 492 file_priv->authenticated, -retcode); 493 } 494 495 return -retcode; 496 } 497 EXPORT_SYMBOL(drm_ioctl); 498 499 struct drm_local_map *drm_getsarea(struct drm_device *dev) 500 { 501 struct drm_map_list *entry; 502 503 list_for_each_entry(entry, &dev->maplist, head) { 504 if (entry->map && entry->map->type == _DRM_SHM && 505 (entry->map->flags & _DRM_CONTAINS_LOCK)) { 506 return entry->map; 507 } 508 } 509 return NULL; 510 } 511 EXPORT_SYMBOL(drm_getsarea);
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