1 /** 2 * \file drm_ioctl.c 3 * IOCTL processing for DRM 4 * 5 * \author Rickard E. (Rik) Faith <faith@valinux.com> 6 * \author Gareth Hughes <gareth@valinux.com> 7 */ 8 9 /* 10 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com 11 * 12 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 14 * All Rights Reserved. 15 * 16 * Permission is hereby granted, free of charge, to any person obtaining a 17 * copy of this software and associated documentation files (the "Software"), 18 * to deal in the Software without restriction, including without limitation 19 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 20 * and/or sell copies of the Software, and to permit persons to whom the 21 * Software is furnished to do so, subject to the following conditions: 22 * 23 * The above copyright notice and this permission notice (including the next 24 * paragraph) shall be included in all copies or substantial portions of the 25 * Software. 26 * 27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 33 * OTHER DEALINGS IN THE SOFTWARE. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <dev/drm2/drmP.h> 40 #include <dev/drm2/drm_core.h> 41 42 /** 43 * Get the bus id. 44 * 45 * \param inode device inode. 46 * \param file_priv DRM file private. 47 * \param cmd command. 48 * \param arg user argument, pointing to a drm_unique structure. 49 * \return zero on success or a negative number on failure. 50 * 51 * Copies the bus id from drm_device::unique into user space. 52 */ 53 int drm_getunique(struct drm_device *dev, void *data, 54 struct drm_file *file_priv) 55 { 56 struct drm_unique *u = data; 57 struct drm_master *master = file_priv->master; 58 59 if (u->unique_len >= master->unique_len) { 60 if (copy_to_user(u->unique, master->unique, master->unique_len)) 61 return -EFAULT; 62 } 63 u->unique_len = master->unique_len; 64 65 return 0; 66 } 67 68 static void 69 drm_unset_busid(struct drm_device *dev, 70 struct drm_master *master) 71 { 72 73 free(master->unique, DRM_MEM_DRIVER); 74 master->unique = NULL; 75 master->unique_len = 0; 76 master->unique_size = 0; 77 } 78 79 /** 80 * Set the bus id. 81 * 82 * \param inode device inode. 83 * \param file_priv DRM file private. 84 * \param cmd command. 85 * \param arg user argument, pointing to a drm_unique structure. 86 * \return zero on success or a negative number on failure. 87 * 88 * Copies the bus id from userspace into drm_device::unique, and verifies that 89 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated 90 * in interface version 1.1 and will return EBUSY when setversion has requested 91 * version 1.1 or greater. 92 */ 93 int drm_setunique(struct drm_device *dev, void *data, 94 struct drm_file *file_priv) 95 { 96 struct drm_unique *u = data; 97 struct drm_master *master = file_priv->master; 98 int ret; 99 100 if (master->unique_len || master->unique) 101 return -EBUSY; 102 103 if (!u->unique_len || u->unique_len > 1024) 104 return -EINVAL; 105 106 if (!dev->driver->bus->set_unique) 107 return -EINVAL; 108 109 ret = dev->driver->bus->set_unique(dev, master, u); 110 if (ret) 111 goto err; 112 113 return 0; 114 115 err: 116 drm_unset_busid(dev, master); 117 return ret; 118 } 119 120 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) 121 { 122 struct drm_master *master = file_priv->master; 123 int ret; 124 125 if (master->unique != NULL) 126 drm_unset_busid(dev, master); 127 128 ret = dev->driver->bus->set_busid(dev, master); 129 if (ret) 130 goto err; 131 return 0; 132 err: 133 drm_unset_busid(dev, master); 134 return ret; 135 } 136 137 /** 138 * Get a mapping information. 139 * 140 * \param inode device inode. 141 * \param file_priv DRM file private. 142 * \param cmd command. 143 * \param arg user argument, pointing to a drm_map structure. 144 * 145 * \return zero on success or a negative number on failure. 146 * 147 * Searches for the mapping with the specified offset and copies its information 148 * into userspace 149 */ 150 int drm_getmap(struct drm_device *dev, void *data, 151 struct drm_file *file_priv) 152 { 153 struct drm_map *map = data; 154 struct drm_map_list *r_list = NULL; 155 struct list_head *list; 156 int idx; 157 int i; 158 159 idx = map->offset; 160 if (idx < 0) 161 return -EINVAL; 162 163 i = 0; 164 DRM_LOCK(dev); 165 list_for_each(list, &dev->maplist) { 166 if (i == idx) { 167 r_list = list_entry(list, struct drm_map_list, head); 168 break; 169 } 170 i++; 171 } 172 if (!r_list || !r_list->map) { 173 DRM_UNLOCK(dev); 174 return -EINVAL; 175 } 176 177 map->offset = r_list->map->offset; 178 map->size = r_list->map->size; 179 map->type = r_list->map->type; 180 map->flags = r_list->map->flags; 181 map->handle = (void *)(unsigned long) r_list->user_token; 182 map->mtrr = r_list->map->mtrr; 183 DRM_UNLOCK(dev); 184 185 return 0; 186 } 187 188 /** 189 * Get client information. 190 * 191 * \param inode device inode. 192 * \param file_priv DRM file private. 193 * \param cmd command. 194 * \param arg user argument, pointing to a drm_client structure. 195 * 196 * \return zero on success or a negative number on failure. 197 * 198 * Searches for the client with the specified index and copies its information 199 * into userspace 200 */ 201 int drm_getclient(struct drm_device *dev, void *data, 202 struct drm_file *file_priv) 203 { 204 struct drm_client *client = data; 205 struct drm_file *pt; 206 int idx; 207 int i; 208 209 idx = client->idx; 210 i = 0; 211 212 DRM_LOCK(dev); 213 list_for_each_entry(pt, &dev->filelist, lhead) { 214 if (i++ >= idx) { 215 client->auth = pt->authenticated; 216 client->pid = pt->pid; 217 client->uid = pt->uid; 218 client->magic = pt->magic; 219 client->iocs = pt->ioctl_count; 220 DRM_UNLOCK(dev); 221 222 return 0; 223 } 224 } 225 DRM_UNLOCK(dev); 226 227 return -EINVAL; 228 } 229 230 /** 231 * Get statistics information. 232 * 233 * \param inode device inode. 234 * \param file_priv DRM file private. 235 * \param cmd command. 236 * \param arg user argument, pointing to a drm_stats structure. 237 * 238 * \return zero on success or a negative number on failure. 239 */ 240 int drm_getstats(struct drm_device *dev, void *data, 241 struct drm_file *file_priv) 242 { 243 struct drm_stats *stats = data; 244 int i; 245 246 memset(stats, 0, sizeof(*stats)); 247 248 for (i = 0; i < dev->counters; i++) { 249 if (dev->types[i] == _DRM_STAT_LOCK) 250 stats->data[i].value = 251 (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0); 252 else 253 stats->data[i].value = atomic_read(&dev->counts[i]); 254 stats->data[i].type = dev->types[i]; 255 } 256 257 stats->count = dev->counters; 258 259 return 0; 260 } 261 262 /** 263 * Get device/driver capabilities 264 */ 265 int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) 266 { 267 struct drm_get_cap *req = data; 268 269 req->value = 0; 270 switch (req->capability) { 271 case DRM_CAP_DUMB_BUFFER: 272 if (dev->driver->dumb_create) 273 req->value = 1; 274 break; 275 case DRM_CAP_VBLANK_HIGH_CRTC: 276 req->value = 1; 277 break; 278 case DRM_CAP_DUMB_PREFERRED_DEPTH: 279 req->value = dev->mode_config.preferred_depth; 280 break; 281 case DRM_CAP_DUMB_PREFER_SHADOW: 282 req->value = dev->mode_config.prefer_shadow; 283 break; 284 case DRM_CAP_PRIME: 285 req->value |= false /* XXXKIB dev->driver->prime_fd_to_handle */ ? DRM_PRIME_CAP_IMPORT : 0; 286 req->value |= false /* XXXKIB dev->driver->prime_handle_to_fd */ ? DRM_PRIME_CAP_EXPORT : 0; 287 break; 288 case DRM_CAP_TIMESTAMP_MONOTONIC: 289 req->value = drm_timestamp_monotonic; 290 break; 291 default: 292 return -EINVAL; 293 } 294 return 0; 295 } 296 297 /** 298 * Setversion ioctl. 299 * 300 * \param inode device inode. 301 * \param file_priv DRM file private. 302 * \param cmd command. 303 * \param arg user argument, pointing to a drm_lock structure. 304 * \return zero on success or negative number on failure. 305 * 306 * Sets the requested interface version 307 */ 308 int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) 309 { 310 struct drm_set_version *sv = data; 311 int if_version, retcode = 0; 312 313 if (sv->drm_di_major != -1) { 314 if (sv->drm_di_major != DRM_IF_MAJOR || 315 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { 316 retcode = -EINVAL; 317 goto done; 318 } 319 if_version = DRM_IF_VERSION(sv->drm_di_major, 320 sv->drm_di_minor); 321 dev->if_version = max(if_version, dev->if_version); 322 if (sv->drm_di_minor >= 1) { 323 /* 324 * Version 1.1 includes tying of DRM to specific device 325 * Version 1.4 has proper PCI domain support 326 */ 327 retcode = drm_set_busid(dev, file_priv); 328 if (retcode) 329 goto done; 330 } 331 } 332 333 if (sv->drm_dd_major != -1) { 334 if (sv->drm_dd_major != dev->driver->major || 335 sv->drm_dd_minor < 0 || sv->drm_dd_minor > 336 dev->driver->minor) { 337 retcode = -EINVAL; 338 goto done; 339 } 340 341 if (dev->driver->set_version) 342 dev->driver->set_version(dev, sv); 343 } 344 345 done: 346 sv->drm_di_major = DRM_IF_MAJOR; 347 sv->drm_di_minor = DRM_IF_MINOR; 348 sv->drm_dd_major = dev->driver->major; 349 sv->drm_dd_minor = dev->driver->minor; 350 351 return retcode; 352 } 353 354 /** No-op ioctl. */ 355 int drm_noop(struct drm_device *dev, void *data, 356 struct drm_file *file_priv) 357 { 358 DRM_DEBUG("\n"); 359 return 0; 360 } 361 EXPORT_SYMBOL(drm_noop); 362