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