sys/external/bsd/drm/dist/bsd-core/drm_ioctl.c

   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  */
  30
  31 /** @file drm_ioctl.c
  32  * Varios minor DRM ioctls not applicable to other files, such as versioning
  33  * information and reporting DRM information to userland.
  34  */
  35
  36 #include "drmP.h"
  37
  38 /*
  39  * Beginning in revision 1.1 of the DRM interface, getunique will return
  40  * a unique in the form pci:oooo:bb:dd.f (o=domain, b=bus, d=device, f=function)
  41  * before setunique has been called.  The format for the bus-specific part of
  42  * the unique is not defined for any other bus.
  43  */
  44 int drm_getunique(struct drm_device *dev, void *data,
  45                   struct drm_file *file_priv)
  46 {
  47         struct drm_unique *u = data;
  48
  49         if (u->unique_len >= dev->unique_len) {
  50                 if (DRM_COPY_TO_USER(u->unique, dev->unique, dev->unique_len))
  51                         return EFAULT;
  52         }
  53         u->unique_len = dev->unique_len;
  54
  55         return 0;
  56 }
  57
  58 /* Deprecated in DRM version 1.1, and will return EBUSY when setversion has
  59  * requested version 1.1 or greater.
  60  */
  61 int drm_setunique(struct drm_device *dev, void *data,
  62                   struct drm_file *file_priv)
  63 {
  64 #if defined(__NetBSD__)
  65         return EOPNOTSUPP;
  66 #else
  67         struct drm_unique *u = data;
  68         int domain, bus, slot, func, ret;
  69         char *busid;
  70
  71         /* Check and copy in the submitted Bus ID */
  72         if (!u->unique_len || u->unique_len > 1024)
  73                 return EINVAL;
  74
  75         busid = malloc(u->unique_len + 1, DRM_MEM_DRIVER, M_WAITOK);
  76         if (busid == NULL)
  77                 return ENOMEM;
  78
  79         if (DRM_COPY_FROM_USER(busid, u->unique, u->unique_len)) {
  80                 free(busid, DRM_MEM_DRIVER);
  81                 return EFAULT;
  82         }
  83         busid[u->unique_len] = '\0';
  84
  85         /* Return error if the busid submitted doesn't match the device's actual
  86          * busid.
  87          */
  88         ret = sscanf(busid, "PCI:%d:%d:%d", &bus, &slot, &func);
  89         if (ret != 3) {
  90                 free(busid, DRM_MEM_DRIVER);
  91                 return EINVAL;
  92         }
  93         domain = bus >> 8;
  94         bus &= 0xff;
  95
  96         if ((domain != dev->pci_domain) ||
  97             (bus != dev->pci_bus) ||
  98             (slot != dev->pci_slot) ||
  99             (func != dev->pci_func)) {
 100                 free(busid, DRM_MEM_DRIVER);
 101                 return EINVAL;
 102         }
 103
 104         /* Actually set the device's busid now. */
 105         DRM_LOCK();
 106         if (dev->unique_len || dev->unique) {
 107                 DRM_UNLOCK();
 108                 return EBUSY;
 109         }
 110
 111         dev->unique_len = u->unique_len;
 112         dev->unique = busid;
 113         DRM_UNLOCK();
 114
 115         return 0;
 116 #endif
 117 }
 118
 119
 120 static int
 121 drm_set_busid(struct drm_device *dev)
 122 {
 123
 124         DRM_LOCK();
 125
 126         if (dev->unique != NULL) {
 127                 DRM_UNLOCK();
 128                 return EBUSY;
 129         }
 130
 131         dev->unique_len = 20;
 132         dev->unique = malloc(dev->unique_len + 1, DRM_MEM_DRIVER, M_NOWAIT);
 133         if (dev->unique == NULL) {
 134                 DRM_UNLOCK();
 135                 return ENOMEM;
 136         }
 137
 138         snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%1x",
 139             dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func);
 140
 141         DRM_UNLOCK();
 142
 143         return 0;
 144 }
 145
 146 int drm_getmap(struct drm_device *dev, void *data, struct drm_file *file_priv)
 147 {
 148         struct drm_map     *map = data;
 149         drm_local_map_t    *mapinlist;
 150         int          idx;
 151         int          i = 0;
 152
 153         idx = map->offset;
 154
 155         DRM_LOCK();
 156         if (idx < 0) {
 157                 DRM_UNLOCK();
 158                 return EINVAL;
 159         }
 160
 161         TAILQ_FOREACH(mapinlist, &dev->maplist, link) {
 162                 if (i == idx) {
 163                         map->offset = mapinlist->offset;
 164                         map->size   = mapinlist->size;
 165                         map->type   = mapinlist->type;
 166                         map->flags  = mapinlist->flags;
 167                         map->handle = mapinlist->handle;
 168                         map->mtrr   = mapinlist->mtrr;
 169                         break;
 170                 }
 171                 i++;
 172         }
 173
 174         DRM_UNLOCK();
 175
 176         if (mapinlist == NULL)
 177                 return EINVAL;
 178
 179         return 0;
 180 }
 181
 182 int drm_getclient(struct drm_device *dev, void *data,
 183                   struct drm_file *file_priv)
 184 {
 185         struct drm_client *client = data;
 186         struct drm_file *pt;
 187         int idx;
 188         int i = 0;
 189
 190         idx = client->idx;
 191         DRM_LOCK();
 192         TAILQ_FOREACH(pt, &dev->files, link) {
 193                 if (i == idx) {
 194                         client->auth  = pt->authenticated;
 195                         client->pid   = pt->pid;
 196                         client->uid   = pt->uid;
 197                         client->magic = pt->magic;
 198                         client->iocs  = pt->ioctl_count;
 199                         DRM_UNLOCK();
 200                         return 0;
 201                 }
 202                 i++;
 203         }
 204         DRM_UNLOCK();
 205
 206         return EINVAL;
 207 }
 208
 209 int drm_getstats(struct drm_device *dev, void *data, struct drm_file *file_priv)
 210 {
 211         struct drm_stats *stats = data;
 212         int          i;
 213
 214         memset(stats, 0, sizeof(struct drm_stats));
 215
 216         DRM_LOCK();
 217
 218         for (i = 0; i < dev->counters; i++) {
 219                 if (dev->types[i] == _DRM_STAT_LOCK)
 220                         stats->data[i].value =
 221                             (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0);
 222                 else
 223                         stats->data[i].value = atomic_read(&dev->counts[i]);
 224                 stats->data[i].type = dev->types[i];
 225         }
 226
 227         stats->count = dev->counters;
 228
 229         DRM_UNLOCK();
 230
 231         return 0;
 232 }
 233
 234 #define DRM_IF_MAJOR    1
 235 #define DRM_IF_MINOR    2
 236
 237 int drm_setversion(struct drm_device *dev, void *data,
 238                    struct drm_file *file_priv)
 239 {
 240         struct drm_set_version *sv = data;
 241         struct drm_set_version ver;
 242         int if_version;
 243
 244         /* Save the incoming data, and set the response before continuing
 245          * any further.
 246          */
 247         ver = *sv;
 248         sv->drm_di_major = DRM_IF_MAJOR;
 249         sv->drm_di_minor = DRM_IF_MINOR;
 250         sv->drm_dd_major = dev->driver->major;
 251         sv->drm_dd_minor = dev->driver->minor;
 252
 253         if (ver.drm_di_major != -1) {
 254                 if (ver.drm_di_major != DRM_IF_MAJOR ||
 255                     ver.drm_di_minor < 0 || ver.drm_di_minor > DRM_IF_MINOR) {
 256                         return EINVAL;
 257                 }
 258                 if_version = DRM_IF_VERSION(ver.drm_di_major,
 259                     ver.drm_dd_minor);
 260                 dev->if_version = DRM_MAX(if_version, dev->if_version);
 261                 if (ver.drm_di_minor >= 1) {
 262                         /*
 263                          * Version 1.1 includes tying of DRM to specific device
 264                          */
 265                         drm_set_busid(dev);
 266                 }
 267         }
 268
 269         if (ver.drm_dd_major != -1) {
 270                 if (ver.drm_dd_major != dev->driver->major ||
 271                     ver.drm_dd_minor < 0 ||
 272                     ver.drm_dd_minor > dev->driver->minor)
 273                 {
 274                         return EINVAL;
 275                 }
 276         }
 277
 278         return 0;
 279 }
 280
 281
 282 int drm_noop(struct drm_device *dev, void *data, struct drm_file *file_priv)
 283 {
 284         DRM_DEBUG("\n");
 285         return 0;
 286 }