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 #include <dev/drm2/drmP.h> 38 #include <dev/drm2/drm_core.h> 39 40 /** 41 * Get the bus id. 42 * 43 * \param inode device inode. 44 * \param file_priv DRM file private. 45 * \param cmd command. 46 * \param arg user argument, pointing to a drm_unique structure. 47 * \return zero on success or a negative number on failure. 48 * 49 * Copies the bus id from drm_device::unique into user space. 50 */ 51 int drm_getunique(struct drm_device *dev, void *data, 52 struct drm_file *file_priv) 53 { 54 struct drm_unique *u = data; 55 struct drm_master *master = file_priv->master; 56 57 if (u->unique_len >= master->unique_len) { 58 if (copy_to_user(u->unique, master->unique, master->unique_len)) 59 return -EFAULT; 60 } 61 u->unique_len = master->unique_len; 62 63 return 0; 64 } 65 66 static void 67 drm_unset_busid(struct drm_device *dev, 68 struct drm_master *master) 69 { 70 71 free(master->unique, DRM_MEM_DRIVER); 72 master->unique = NULL; 73 master->unique_len = 0; 74 master->unique_size = 0; 75 } 76 77 /** 78 * Set the bus id. 79 * 80 * \param inode device inode. 81 * \param file_priv DRM file private. 82 * \param cmd command. 83 * \param arg user argument, pointing to a drm_unique structure. 84 * \return zero on success or a negative number on failure. 85 * 86 * Copies the bus id from userspace into drm_device::unique, and verifies that 87 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated 88 * in interface version 1.1 and will return EBUSY when setversion has requested 89 * version 1.1 or greater. 90 */ 91 int drm_setunique(struct drm_device *dev, void *data, 92 struct drm_file *file_priv) 93 { 94 struct drm_unique *u = data; 95 struct drm_master *master = file_priv->master; 96 int ret; 97 98 if (master->unique_len || master->unique) 99 return -EBUSY; 100 101 if (!u->unique_len || u->unique_len > 1024) 102 return -EINVAL; 103 104 if (!dev->driver->bus->set_unique) 105 return -EINVAL; 106 107 ret = dev->driver->bus->set_unique(dev, master, u); 108 if (ret) 109 goto err; 110 111 return 0; 112 113 err: 114 drm_unset_busid(dev, master); 115 return ret; 116 } 117 118 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) 119 { 120 struct drm_master *master = file_priv->master; 121 int ret; 122 123 if (master->unique != NULL) 124 drm_unset_busid(dev, master); 125 126 ret = dev->driver->bus->set_busid(dev, master); 127 if (ret) 128 goto err; 129 return 0; 130 err: 131 drm_unset_busid(dev, master); 132 return ret; 133 } 134 135 /** 136 * Get a mapping information. 137 * 138 * \param inode device inode. 139 * \param file_priv DRM file private. 140 * \param cmd command. 141 * \param arg user argument, pointing to a drm_map structure. 142 * 143 * \return zero on success or a negative number on failure. 144 * 145 * Searches for the mapping with the specified offset and copies its information 146 * into userspace 147 */ 148 int drm_getmap(struct drm_device *dev, void *data, 149 struct drm_file *file_priv) 150 { 151 struct drm_map *map = data; 152 struct drm_map_list *r_list = NULL; 153 struct list_head *list; 154 int idx; 155 int i; 156 157 idx = map->offset; 158 if (idx < 0) 159 return -EINVAL; 160 161 i = 0; 162 DRM_LOCK(dev); 163 list_for_each(list, &dev->maplist) { 164 if (i == idx) { 165 r_list = list_entry(list, struct drm_map_list, head); 166 break; 167 } 168 i++; 169 } 170 if (!r_list || !r_list->map) { 171 DRM_UNLOCK(dev); 172 return -EINVAL; 173 } 174 175 map->offset = r_list->map->offset; 176 map->size = r_list->map->size; 177 map->type = r_list->map->type; 178 map->flags = r_list->map->flags; 179 map->handle = (void *)(unsigned long) r_list->user_token; 180 map->mtrr = r_list->map->mtrr; 181 DRM_UNLOCK(dev); 182 183 return 0; 184 } 185 186 /** 187 * Get client information. 188 * 189 * \param inode device inode. 190 * \param file_priv DRM file private. 191 * \param cmd command. 192 * \param arg user argument, pointing to a drm_client structure. 193 * 194 * \return zero on success or a negative number on failure. 195 * 196 * Searches for the client with the specified index and copies its information 197 * into userspace 198 */ 199 int drm_getclient(struct drm_device *dev, void *data, 200 struct drm_file *file_priv) 201 { 202 struct drm_client *client = data; 203 struct drm_file *pt; 204 int idx; 205 int i; 206 207 idx = client->idx; 208 i = 0; 209 210 DRM_LOCK(dev); 211 list_for_each_entry(pt, &dev->filelist, lhead) { 212 if (i++ >= idx) { 213 client->auth = pt->authenticated; 214 client->pid = pt->pid; 215 client->uid = pt->uid; 216 client->magic = pt->magic; 217 client->iocs = pt->ioctl_count; 218 DRM_UNLOCK(dev); 219 220 return 0; 221 } 222 } 223 DRM_UNLOCK(dev); 224 225 return -EINVAL; 226 } 227 228 /** 229 * Get statistics information. 230 * 231 * \param inode device inode. 232 * \param file_priv DRM file private. 233 * \param cmd command. 234 * \param arg user argument, pointing to a drm_stats structure. 235 * 236 * \return zero on success or a negative number on failure. 237 */ 238 int drm_getstats(struct drm_device *dev, void *data, 239 struct drm_file *file_priv) 240 { 241 struct drm_stats *stats = data; 242 int i; 243 244 memset(stats, 0, sizeof(*stats)); 245 246 for (i = 0; i < dev->counters; i++) { 247 if (dev->types[i] == _DRM_STAT_LOCK) 248 stats->data[i].value = 249 (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0); 250 else 251 stats->data[i].value = atomic_read(&dev->counts[i]); 252 stats->data[i].type = dev->types[i]; 253 } 254 255 stats->count = dev->counters; 256 257 return 0; 258 } 259 260 /** 261 * Get device/driver capabilities 262 */ 263 int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) 264 { 265 struct drm_get_cap *req = data; 266 267 req->value = 0; 268 switch (req->capability) { 269 case DRM_CAP_DUMB_BUFFER: 270 if (dev->driver->dumb_create) 271 req->value = 1; 272 break; 273 case DRM_CAP_VBLANK_HIGH_CRTC: 274 req->value = 1; 275 break; 276 case DRM_CAP_DUMB_PREFERRED_DEPTH: 277 req->value = dev->mode_config.preferred_depth; 278 break; 279 case DRM_CAP_DUMB_PREFER_SHADOW: 280 req->value = dev->mode_config.prefer_shadow; 281 break; 282 case DRM_CAP_PRIME: 283 req->value |= false /* XXXKIB dev->driver->prime_fd_to_handle */ ? DRM_PRIME_CAP_IMPORT : 0; 284 req->value |= false /* XXXKIB dev->driver->prime_handle_to_fd */ ? DRM_PRIME_CAP_EXPORT : 0; 285 break; 286 case DRM_CAP_TIMESTAMP_MONOTONIC: 287 req->value = drm_timestamp_monotonic; 288 break; 289 default: 290 return -EINVAL; 291 } 292 return 0; 293 } 294 295 /** 296 * Setversion ioctl. 297 * 298 * \param inode device inode. 299 * \param file_priv DRM file private. 300 * \param cmd command. 301 * \param arg user argument, pointing to a drm_lock structure. 302 * \return zero on success or negative number on failure. 303 * 304 * Sets the requested interface version 305 */ 306 int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) 307 { 308 struct drm_set_version *sv = data; 309 int if_version, retcode = 0; 310 311 if (sv->drm_di_major != -1) { 312 if (sv->drm_di_major != DRM_IF_MAJOR || 313 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { 314 retcode = -EINVAL; 315 goto done; 316 } 317 if_version = DRM_IF_VERSION(sv->drm_di_major, 318 sv->drm_di_minor); 319 dev->if_version = max(if_version, dev->if_version); 320 if (sv->drm_di_minor >= 1) { 321 /* 322 * Version 1.1 includes tying of DRM to specific device 323 * Version 1.4 has proper PCI domain support 324 */ 325 retcode = drm_set_busid(dev, file_priv); 326 if (retcode) 327 goto done; 328 } 329 } 330 331 if (sv->drm_dd_major != -1) { 332 if (sv->drm_dd_major != dev->driver->major || 333 sv->drm_dd_minor < 0 || sv->drm_dd_minor > 334 dev->driver->minor) { 335 retcode = -EINVAL; 336 goto done; 337 } 338 339 if (dev->driver->set_version) 340 dev->driver->set_version(dev, sv); 341 } 342 343 done: 344 sv->drm_di_major = DRM_IF_MAJOR; 345 sv->drm_di_minor = DRM_IF_MINOR; 346 sv->drm_dd_major = dev->driver->major; 347 sv->drm_dd_minor = dev->driver->minor; 348 349 return retcode; 350 } 351 352 /** No-op ioctl. */ 353 int drm_noop(struct drm_device *dev, void *data, 354 struct drm_file *file_priv) 355 { 356 DRM_DEBUG("\n"); 357 return 0; 358 } 359 EXPORT_SYMBOL(drm_noop); 360