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 "drmP.h" 37 #include "drm_core.h" 38 39 #include "linux/pci.h" 40 41 /** 42 * Get the bus id. 43 * 44 * \param inode device inode. 45 * \param file_priv DRM file private. 46 * \param cmd command. 47 * \param arg user argument, pointing to a drm_unique structure. 48 * \return zero on success or a negative number on failure. 49 * 50 * Copies the bus id from drm_device::unique into user space. 51 */ 52 int drm_getunique(struct drm_device *dev, void *data, 53 struct drm_file *file_priv) 54 { 55 struct drm_unique *u = data; 56 struct drm_master *master = file_priv->master; 57 58 if (u->unique_len >= master->unique_len) { 59 if (copy_to_user(u->unique, master->unique, master->unique_len)) 60 return -EFAULT; 61 } 62 u->unique_len = master->unique_len; 63 64 return 0; 65 } 66 67 /** 68 * Set the bus id. 69 * 70 * \param inode device inode. 71 * \param file_priv DRM file private. 72 * \param cmd command. 73 * \param arg user argument, pointing to a drm_unique structure. 74 * \return zero on success or a negative number on failure. 75 * 76 * Copies the bus id from userspace into drm_device::unique, and verifies that 77 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated 78 * in interface version 1.1 and will return EBUSY when setversion has requested 79 * version 1.1 or greater. 80 */ 81 int drm_setunique(struct drm_device *dev, void *data, 82 struct drm_file *file_priv) 83 { 84 struct drm_unique *u = data; 85 struct drm_master *master = file_priv->master; 86 int domain, bus, slot, func, ret; 87 88 if (master->unique_len || master->unique) 89 return -EBUSY; 90 91 if (!u->unique_len || u->unique_len > 1024) 92 return -EINVAL; 93 94 master->unique_len = u->unique_len; 95 master->unique_size = u->unique_len + 1; 96 master->unique = drm_alloc(master->unique_size, DRM_MEM_DRIVER); 97 if (!master->unique) 98 return -ENOMEM; 99 if (copy_from_user(master->unique, u->unique, master->unique_len)) 100 return -EFAULT; 101 102 master->unique[master->unique_len] = '\0'; 103 104 dev->devname = 105 drm_alloc(strlen(dev->driver->pci_driver.name) + 106 strlen(master->unique) + 2, DRM_MEM_DRIVER); 107 if (!dev->devname) 108 return -ENOMEM; 109 110 sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, 111 master->unique); 112 113 /* Return error if the busid submitted doesn't match the device's actual 114 * busid. 115 */ 116 ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func); 117 if (ret != 3) 118 return -EINVAL; 119 domain = bus >> 8; 120 bus &= 0xff; 121 122 if ((domain != drm_get_pci_domain(dev)) || 123 (bus != dev->pdev->bus->number) || 124 (slot != PCI_SLOT(dev->pdev->devfn)) || 125 (func != PCI_FUNC(dev->pdev->devfn))) 126 return -EINVAL; 127 128 return 0; 129 } 130 131 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) 132 { 133 struct drm_master *master = file_priv->master; 134 int len; 135 136 if (master->unique != NULL) 137 return -EBUSY; 138 139 master->unique_len = 40; 140 master->unique_size = master->unique_len; 141 master->unique = drm_alloc(master->unique_size, DRM_MEM_DRIVER); 142 if (master->unique == NULL) 143 return -ENOMEM; 144 145 len = snprintf(master->unique, master->unique_len, "pci:%04x:%02x:%02x.%d", 146 drm_get_pci_domain(dev), 147 dev->pdev->bus->number, 148 PCI_SLOT(dev->pdev->devfn), 149 PCI_FUNC(dev->pdev->devfn)); 150 if (len >= master->unique_len) 151 DRM_ERROR("buffer overflow"); 152 else 153 master->unique_len = len; 154 155 dev->devname = 156 drm_alloc(strlen(dev->driver->pci_driver.name) + master->unique_len + 157 2, DRM_MEM_DRIVER); 158 if (dev->devname == NULL) 159 return -ENOMEM; 160 161 sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, 162 master->unique); 163 164 return 0; 165 } 166 167 /** 168 * Get a mapping information. 169 * 170 * \param inode device inode. 171 * \param file_priv DRM file private. 172 * \param cmd command. 173 * \param arg user argument, pointing to a drm_map structure. 174 * 175 * \return zero on success or a negative number on failure. 176 * 177 * Searches for the mapping with the specified offset and copies its information 178 * into userspace 179 */ 180 int drm_getmap(struct drm_device *dev, void *data, 181 struct drm_file *file_priv) 182 { 183 struct drm_map *map = data; 184 struct drm_map_list *r_list = NULL; 185 struct list_head *list; 186 int idx; 187 int i; 188 189 idx = map->offset; 190 191 mutex_lock(&dev->struct_mutex); 192 if (idx < 0) { 193 mutex_unlock(&dev->struct_mutex); 194 return -EINVAL; 195 } 196 197 i = 0; 198 list_for_each(list, &dev->maplist) { 199 if (i == idx) { 200 r_list = list_entry(list, struct drm_map_list, head); 201 break; 202 } 203 i++; 204 } 205 if (!r_list || !r_list->map) { 206 mutex_unlock(&dev->struct_mutex); 207 return -EINVAL; 208 } 209 210 map->offset = r_list->map->offset; 211 map->size = r_list->map->size; 212 map->type = r_list->map->type; 213 map->flags = r_list->map->flags; 214 map->handle = (void *)(unsigned long) r_list->user_token; 215 map->mtrr = r_list->map->mtrr; 216 mutex_unlock(&dev->struct_mutex); 217 218 return 0; 219 } 220 221 /** 222 * Get client information. 223 * 224 * \param inode device inode. 225 * \param file_priv DRM file private. 226 * \param cmd command. 227 * \param arg user argument, pointing to a drm_client structure. 228 * 229 * \return zero on success or a negative number on failure. 230 * 231 * Searches for the client with the specified index and copies its information 232 * into userspace 233 */ 234 int drm_getclient(struct drm_device *dev, void *data, 235 struct drm_file *file_priv) 236 { 237 struct drm_client *client = data; 238 struct drm_file *pt; 239 int idx; 240 int i; 241 242 idx = client->idx; 243 mutex_lock(&dev->struct_mutex); 244 245 i = 0; 246 list_for_each_entry(pt, &dev->filelist, lhead) { 247 if (i++ >= idx) { 248 client->auth = pt->authenticated; 249 client->pid = pt->pid; 250 client->uid = pt->uid; 251 client->magic = pt->magic; 252 client->iocs = pt->ioctl_count; 253 mutex_unlock(&dev->struct_mutex); 254 255 return 0; 256 } 257 } 258 mutex_unlock(&dev->struct_mutex); 259 260 return -EINVAL; 261 } 262 263 /** 264 * Get statistics information. 265 * 266 * \param inode device inode. 267 * \param file_priv DRM file private. 268 * \param cmd command. 269 * \param arg user argument, pointing to a drm_stats structure. 270 * 271 * \return zero on success or a negative number on failure. 272 */ 273 int drm_getstats(struct drm_device *dev, void *data, 274 struct drm_file *file_priv) 275 { 276 struct drm_stats *stats = data; 277 int i; 278 279 memset(stats, 0, sizeof(*stats)); 280 281 mutex_lock(&dev->struct_mutex); 282 283 for (i = 0; i < dev->counters; i++) { 284 if (dev->types[i] == _DRM_STAT_LOCK) 285 stats->data[i].value = 286 (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0); 287 else 288 stats->data[i].value = atomic_read(&dev->counts[i]); 289 stats->data[i].type = dev->types[i]; 290 } 291 292 stats->count = dev->counters; 293 294 mutex_unlock(&dev->struct_mutex); 295 296 return 0; 297 } 298 299 /** 300 * Setversion ioctl. 301 * 302 * \param inode device inode. 303 * \param file_priv DRM file private. 304 * \param cmd command. 305 * \param arg user argument, pointing to a drm_lock structure. 306 * \return zero on success or negative number on failure. 307 * 308 * Sets the requested interface version 309 */ 310 int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) 311 { 312 struct drm_set_version *sv = data; 313 int if_version, retcode = 0; 314 315 if (sv->drm_di_major != -1) { 316 if (sv->drm_di_major != DRM_IF_MAJOR || 317 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { 318 retcode = -EINVAL; 319 goto done; 320 } 321 if_version = DRM_IF_VERSION(sv->drm_di_major, 322 sv->drm_di_minor); 323 dev->if_version = max(if_version, dev->if_version); 324 if (sv->drm_di_minor >= 1) { 325 /* 326 * Version 1.1 includes tying of DRM to specific device 327 */ 328 drm_set_busid(dev, file_priv); 329 } 330 } 331 332 if (sv->drm_dd_major != -1) { 333 if (sv->drm_dd_major != dev->driver->major || 334 sv->drm_dd_minor < 0 || sv->drm_dd_minor > 335 dev->driver->minor) { 336 retcode = -EINVAL; 337 goto done; 338 } 339 340 if (dev->driver->set_version) 341 dev->driver->set_version(dev, sv); 342 } 343 344 done: 345 sv->drm_di_major = DRM_IF_MAJOR; 346 sv->drm_di_minor = DRM_IF_MINOR; 347 sv->drm_dd_major = dev->driver->major; 348 sv->drm_dd_minor = dev->driver->minor; 349 350 return retcode; 351 } 352 353 /** No-op ioctl. */ 354 int drm_noop(struct drm_device *dev, void *data, 355 struct drm_file *file_priv) 356 { 357 DRM_DEBUG("\n"); 358 return 0; 359 } 360