drm_ioctl.c revision 152909
1/* drm_ioctl.h -- IOCTL processing for DRM -*- linux-c -*- 2 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com 3 */ 4/*- 5 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 6 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 7 * All Rights Reserved. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice (including the next 17 * paragraph) shall be included in all copies or substantial portions of the 18 * Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 26 * OTHER DEALINGS IN THE SOFTWARE. 27 * 28 * Authors: 29 * Rickard E. (Rik) Faith <faith@valinux.com> 30 * Gareth Hughes <gareth@valinux.com> 31 * 32 */ 33 34#include <sys/cdefs.h> 35__FBSDID("$FreeBSD: head/sys/dev/drm/drm_ioctl.c 152909 2005-11-28 23:13:57Z anholt $"); 36 37#include "dev/drm/drmP.h" 38 39/* 40 * Beginning in revision 1.1 of the DRM interface, getunique will return 41 * a unique in the form pci:oooo:bb:dd.f (o=domain, b=bus, d=device, f=function) 42 * before setunique has been called. The format for the bus-specific part of 43 * the unique is not defined for any other bus. 44 */ 45int drm_getunique(DRM_IOCTL_ARGS) 46{ 47 DRM_DEVICE; 48 drm_unique_t u; 49 50 DRM_COPY_FROM_USER_IOCTL( u, (drm_unique_t *)data, sizeof(u) ); 51 52 if (u.unique_len >= dev->unique_len) { 53 if (DRM_COPY_TO_USER(u.unique, dev->unique, dev->unique_len)) 54 return DRM_ERR(EFAULT); 55 } 56 u.unique_len = dev->unique_len; 57 58 DRM_COPY_TO_USER_IOCTL( (drm_unique_t *)data, u, sizeof(u) ); 59 60 return 0; 61} 62 63/* Deprecated in DRM version 1.1, and will return EBUSY when setversion has 64 * requested version 1.1 or greater. 65 */ 66int drm_setunique(DRM_IOCTL_ARGS) 67{ 68 DRM_DEVICE; 69 drm_unique_t u; 70 int domain, bus, slot, func, ret; 71 char *busid; 72 73 DRM_COPY_FROM_USER_IOCTL( u, (drm_unique_t *)data, sizeof(u) ); 74 75 /* Check and copy in the submitted Bus ID */ 76 if (!u.unique_len || u.unique_len > 1024) 77 return DRM_ERR(EINVAL); 78 79 busid = malloc(u.unique_len + 1, M_DRM, M_WAITOK); 80 if (busid == NULL) 81 return DRM_ERR(ENOMEM); 82 83 if (DRM_COPY_FROM_USER(busid, u.unique, u.unique_len)) { 84 free(busid, M_DRM); 85 return DRM_ERR(EFAULT); 86 } 87 busid[u.unique_len] = '\0'; 88 89 /* Return error if the busid submitted doesn't match the device's actual 90 * busid. 91 */ 92 ret = sscanf(busid, "PCI:%d:%d:%d", &bus, &slot, &func); 93 if (ret != 3) { 94 free(busid, M_DRM); 95 return DRM_ERR(EINVAL); 96 } 97 domain = bus >> 8; 98 bus &= 0xff; 99 100 if ((domain != dev->pci_domain) || 101 (bus != dev->pci_bus) || 102 (slot != dev->pci_slot) || 103 (func != dev->pci_func)) { 104 free(busid, M_DRM); 105 return DRM_ERR(EINVAL); 106 } 107 108 /* Actually set the device's busid now. */ 109 DRM_LOCK(); 110 if (dev->unique_len || dev->unique) { 111 DRM_UNLOCK(); 112 return DRM_ERR(EBUSY); 113 } 114 115 dev->unique_len = u.unique_len; 116 dev->unique = busid; 117 DRM_UNLOCK(); 118 119 return 0; 120} 121 122 123static int 124drm_set_busid(drm_device_t *dev) 125{ 126 127 DRM_LOCK(); 128 129 if (dev->unique != NULL) { 130 DRM_UNLOCK(); 131 return EBUSY; 132 } 133 134 dev->unique_len = 20; 135 dev->unique = malloc(dev->unique_len + 1, M_DRM, M_NOWAIT); 136 if (dev->unique == NULL) { 137 DRM_UNLOCK(); 138 return ENOMEM; 139 } 140 141 snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%1x", 142 dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func); 143 144 DRM_UNLOCK(); 145 146 return 0; 147} 148 149int drm_getmap(DRM_IOCTL_ARGS) 150{ 151 DRM_DEVICE; 152 drm_map_t map; 153 drm_local_map_t *mapinlist; 154 int idx; 155 int i = 0; 156 157 DRM_COPY_FROM_USER_IOCTL( map, (drm_map_t *)data, sizeof(map) ); 158 159 idx = map.offset; 160 161 DRM_LOCK(); 162 if (idx < 0) { 163 DRM_UNLOCK(); 164 return DRM_ERR(EINVAL); 165 } 166 167 TAILQ_FOREACH(mapinlist, &dev->maplist, link) { 168 if (i==idx) { 169 map.offset = mapinlist->offset; 170 map.size = mapinlist->size; 171 map.type = mapinlist->type; 172 map.flags = mapinlist->flags; 173 map.handle = mapinlist->handle; 174 map.mtrr = mapinlist->mtrr; 175 break; 176 } 177 i++; 178 } 179 180 DRM_UNLOCK(); 181 182 if (mapinlist == NULL) 183 return EINVAL; 184 185 DRM_COPY_TO_USER_IOCTL( (drm_map_t *)data, map, sizeof(map) ); 186 187 return 0; 188} 189 190int drm_getclient(DRM_IOCTL_ARGS) 191{ 192 DRM_DEVICE; 193 drm_client_t client; 194 drm_file_t *pt; 195 int idx; 196 int i = 0; 197 198 DRM_COPY_FROM_USER_IOCTL( client, (drm_client_t *)data, sizeof(client) ); 199 200 idx = client.idx; 201 DRM_LOCK(); 202 TAILQ_FOREACH(pt, &dev->files, link) { 203 if (i==idx) 204 { 205 client.auth = pt->authenticated; 206 client.pid = pt->pid; 207 client.uid = pt->uid; 208 client.magic = pt->magic; 209 client.iocs = pt->ioctl_count; 210 DRM_UNLOCK(); 211 212 *(drm_client_t *)data = client; 213 return 0; 214 } 215 i++; 216 } 217 DRM_UNLOCK(); 218 219 DRM_COPY_TO_USER_IOCTL( (drm_client_t *)data, client, sizeof(client) ); 220 221 return 0; 222} 223 224int drm_getstats(DRM_IOCTL_ARGS) 225{ 226 DRM_DEVICE; 227 drm_stats_t stats; 228 int i; 229 230 memset(&stats, 0, sizeof(stats)); 231 232 DRM_LOCK(); 233 234 for (i = 0; i < dev->counters; i++) { 235 if (dev->types[i] == _DRM_STAT_LOCK) 236 stats.data[i].value 237 = (dev->lock.hw_lock 238 ? dev->lock.hw_lock->lock : 0); 239 else 240 stats.data[i].value = atomic_read(&dev->counts[i]); 241 stats.data[i].type = dev->types[i]; 242 } 243 244 stats.count = dev->counters; 245 246 DRM_UNLOCK(); 247 248 DRM_COPY_TO_USER_IOCTL( (drm_stats_t *)data, stats, sizeof(stats) ); 249 250 return 0; 251} 252 253#define DRM_IF_MAJOR 1 254#define DRM_IF_MINOR 2 255 256int drm_setversion(DRM_IOCTL_ARGS) 257{ 258 DRM_DEVICE; 259 drm_set_version_t sv; 260 drm_set_version_t retv; 261 int if_version; 262 263 DRM_COPY_FROM_USER_IOCTL(sv, (drm_set_version_t *)data, sizeof(sv)); 264 265 retv.drm_di_major = DRM_IF_MAJOR; 266 retv.drm_di_minor = DRM_IF_MINOR; 267 retv.drm_dd_major = dev->driver.major; 268 retv.drm_dd_minor = dev->driver.minor; 269 270 DRM_COPY_TO_USER_IOCTL((drm_set_version_t *)data, retv, sizeof(sv)); 271 272 if (sv.drm_di_major != -1) { 273 if (sv.drm_di_major != DRM_IF_MAJOR || 274 sv.drm_di_minor < 0 || sv.drm_di_minor > DRM_IF_MINOR) 275 return EINVAL; 276 if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_dd_minor); 277 dev->if_version = DRM_MAX(if_version, dev->if_version); 278 if (sv.drm_di_minor >= 1) { 279 /* 280 * Version 1.1 includes tying of DRM to specific device 281 */ 282 drm_set_busid(dev); 283 } 284 } 285 286 if (sv.drm_dd_major != -1) { 287 if (sv.drm_dd_major != dev->driver.major || 288 sv.drm_dd_minor < 0 || sv.drm_dd_minor > dev->driver.minor) 289 return EINVAL; 290 } 291 return 0; 292} 293 294 295int drm_noop(DRM_IOCTL_ARGS) 296{ 297 DRM_DEBUG("\n"); 298 return 0; 299} 300