1 /*- 2 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 * OTHER DEALINGS IN THE SOFTWARE. 24 * 25 * Authors: 26 * Rickard E. (Rik) Faith <faith@valinux.com> 27 * Gareth Hughes <gareth@valinux.com> 28 * 29 * $FreeBSD: src/sys/dev/drm2/drm_ioctl.c,v 1.1 2012/05/22 11:07:44 kib Exp $ 30 */ 31 32 /** @file drm_ioctl.c 33 * Varios minor DRM ioctls not applicable to other files, such as versioning 34 * information and reporting DRM information to userland. 35 */ 36 37 #include <drm/drmP.h> 38 #include <drm/drm_core.h> 39 40 /* 41 * Beginning in revision 1.1 of the DRM interface, getunique will return 42 * a unique in the form pci:oooo:bb:dd.f (o=domain, b=bus, d=device, f=function) 43 * before setunique has been called. The format for the bus-specific part of 44 * the unique is not defined for any other bus. 45 */ 46 int drm_getunique(struct drm_device *dev, void *data, 47 struct drm_file *file_priv) 48 { 49 struct drm_unique *u = data; 50 51 if (u->unique_len >= dev->unique_len) { 52 if (DRM_COPY_TO_USER(u->unique, dev->unique, dev->unique_len)) 53 return EFAULT; 54 } 55 u->unique_len = dev->unique_len; 56 57 return 0; 58 } 59 60 /* Deprecated in DRM version 1.1, and will return EBUSY when setversion has 61 * requested version 1.1 or greater. 62 */ 63 int drm_setunique(struct drm_device *dev, void *data, 64 struct drm_file *file_priv) 65 { 66 struct drm_unique *u = data; 67 int domain, bus, slot, func, ret; 68 char *busid; 69 70 /* Check and copy in the submitted Bus ID */ 71 if (!u->unique_len || u->unique_len > 1024) 72 return EINVAL; 73 74 busid = kmalloc(u->unique_len + 1, DRM_MEM_DRIVER, M_WAITOK); 75 if (busid == NULL) 76 return ENOMEM; 77 78 if (DRM_COPY_FROM_USER(busid, u->unique, u->unique_len)) { 79 drm_free(busid, DRM_MEM_DRIVER); 80 return EFAULT; 81 } 82 busid[u->unique_len] = '\0'; 83 84 /* Return error if the busid submitted doesn't match the device's actual 85 * busid. 86 */ 87 ret = ksscanf(busid, "PCI:%d:%d:%d", &bus, &slot, &func); 88 if (ret != 3) { 89 drm_free(busid, DRM_MEM_DRIVER); 90 return EINVAL; 91 } 92 domain = bus >> 8; 93 bus &= 0xff; 94 95 if ((domain != dev->pci_domain) || 96 (bus != dev->pci_bus) || 97 (slot != dev->pci_slot) || 98 (func != dev->pci_func)) { 99 drm_free(busid, DRM_MEM_DRIVER); 100 return EINVAL; 101 } 102 103 /* Actually set the device's busid now. */ 104 DRM_LOCK(dev); 105 if (dev->unique_len || dev->unique) { 106 DRM_UNLOCK(dev); 107 return EBUSY; 108 } 109 110 dev->unique_len = u->unique_len; 111 dev->unique = busid; 112 DRM_UNLOCK(dev); 113 114 return 0; 115 } 116 117 118 static int 119 drm_set_busid(struct drm_device *dev) 120 { 121 122 DRM_LOCK(dev); 123 124 if (dev->unique != NULL) { 125 DRM_UNLOCK(dev); 126 return EBUSY; 127 } 128 129 dev->unique_len = 20; 130 dev->unique = kmalloc(dev->unique_len + 1, DRM_MEM_DRIVER, M_NOWAIT); 131 if (dev->unique == NULL) { 132 DRM_UNLOCK(dev); 133 return ENOMEM; 134 } 135 136 ksnprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%1x", 137 dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func); 138 139 DRM_UNLOCK(dev); 140 141 return 0; 142 } 143 144 /** 145 * Get a mapping information. 146 * 147 * \param inode device inode. 148 * \param file_priv DRM file private. 149 * \param cmd command. 150 * \param arg user argument, pointing to a drm_map structure. 151 * 152 * \return zero on success or a negative number on failure. 153 * 154 * Searches for the mapping with the specified offset and copies its information 155 * into userspace 156 */ 157 int drm_getmap(struct drm_device *dev, void *data, 158 struct drm_file *file_priv) 159 { 160 struct drm_map *map = data; 161 struct drm_map_list *r_list = NULL; 162 struct list_head *list; 163 int idx; 164 int i; 165 166 idx = map->offset; 167 if (idx < 0) { 168 return EINVAL; 169 } 170 171 i = 0; 172 DRM_LOCK(dev); 173 list_for_each(list, &dev->maplist) { 174 if (i == idx) { 175 r_list = list_entry(list, struct drm_map_list, head); 176 break; 177 } 178 i++; 179 } 180 if (!r_list || !r_list->map) { 181 DRM_UNLOCK(dev); 182 return -EINVAL; 183 } 184 185 map->offset = r_list->map->offset; 186 map->size = r_list->map->size; 187 map->type = r_list->map->type; 188 map->flags = r_list->map->flags; 189 map->handle = r_list->map->handle; 190 map->mtrr = r_list->map->mtrr; 191 DRM_UNLOCK(dev); 192 193 return 0; 194 } 195 196 int drm_getclient(struct drm_device *dev, void *data, 197 struct drm_file *file_priv) 198 { 199 struct drm_client *client = data; 200 struct drm_file *pt; 201 int idx; 202 int i = 0; 203 204 idx = client->idx; 205 DRM_LOCK(dev); 206 TAILQ_FOREACH(pt, &dev->files, link) { 207 if (i == idx) { 208 client->auth = pt->authenticated; 209 client->pid = pt->pid; 210 client->uid = pt->uid; 211 client->magic = pt->magic; 212 client->iocs = pt->ioctl_count; 213 DRM_UNLOCK(dev); 214 return 0; 215 } 216 i++; 217 } 218 DRM_UNLOCK(dev); 219 220 return EINVAL; 221 } 222 223 int drm_getstats(struct drm_device *dev, void *data, struct drm_file *file_priv) 224 { 225 struct drm_stats *stats = data; 226 int i; 227 228 memset(stats, 0, sizeof(struct drm_stats)); 229 230 DRM_LOCK(dev); 231 232 for (i = 0; i < dev->counters; i++) { 233 if (dev->types[i] == _DRM_STAT_LOCK) 234 stats->data[i].value = 235 (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0); 236 else 237 stats->data[i].value = atomic_read(&dev->counts[i]); 238 stats->data[i].type = dev->types[i]; 239 } 240 241 stats->count = dev->counters; 242 243 DRM_UNLOCK(dev); 244 245 return 0; 246 } 247 248 int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) 249 { 250 struct drm_get_cap *req = data; 251 252 req->value = 0; 253 switch (req->capability) { 254 case DRM_CAP_DUMB_BUFFER: 255 if (dev->driver->dumb_create) 256 req->value = 1; 257 break; 258 case DRM_CAP_VBLANK_HIGH_CRTC: 259 req->value = 1; 260 break; 261 case DRM_CAP_DUMB_PREFERRED_DEPTH: 262 req->value = dev->mode_config.preferred_depth; 263 break; 264 case DRM_CAP_DUMB_PREFER_SHADOW: 265 req->value = dev->mode_config.prefer_shadow; 266 break; 267 default: 268 return EINVAL; 269 } 270 return 0; 271 } 272 273 int drm_setversion(struct drm_device *dev, void *data, 274 struct drm_file *file_priv) 275 { 276 struct drm_set_version *sv = data; 277 struct drm_set_version ver; 278 int if_version; 279 280 /* Save the incoming data, and set the response before continuing 281 * any further. 282 */ 283 ver = *sv; 284 sv->drm_di_major = DRM_IF_MAJOR; 285 sv->drm_di_minor = DRM_IF_MINOR; 286 sv->drm_dd_major = dev->driver->major; 287 sv->drm_dd_minor = dev->driver->minor; 288 289 DRM_DEBUG("ver.drm_di_major %d ver.drm_di_minor %d " 290 "ver.drm_dd_major %d ver.drm_dd_minor %d\n", 291 ver.drm_di_major, ver.drm_di_minor, ver.drm_dd_major, 292 ver.drm_dd_minor); 293 DRM_DEBUG("sv->drm_di_major %d sv->drm_di_minor %d " 294 "sv->drm_dd_major %d sv->drm_dd_minor %d\n", 295 sv->drm_di_major, sv->drm_di_minor, sv->drm_dd_major, 296 sv->drm_dd_minor); 297 298 if (ver.drm_di_major != -1) { 299 if (ver.drm_di_major != DRM_IF_MAJOR || 300 ver.drm_di_minor < 0 || ver.drm_di_minor > DRM_IF_MINOR) { 301 return EINVAL; 302 } 303 if_version = DRM_IF_VERSION(ver.drm_di_major, 304 ver.drm_dd_minor); 305 dev->if_version = DRM_MAX(if_version, dev->if_version); 306 if (ver.drm_di_minor >= 1) { 307 /* 308 * Version 1.1 includes tying of DRM to specific device 309 */ 310 drm_set_busid(dev); 311 } 312 } 313 314 if (ver.drm_dd_major != -1) { 315 if (ver.drm_dd_major != dev->driver->major || 316 ver.drm_dd_minor < 0 || 317 ver.drm_dd_minor > dev->driver->minor) 318 { 319 return EINVAL; 320 } 321 } 322 323 return 0; 324 } 325 326 327 int drm_noop(struct drm_device *dev, void *data, struct drm_file *file_priv) 328 { 329 DRM_DEBUG("\n"); 330 return 0; 331 } 332