src/gallium/winsys/drm/nouveau/nouveau_device.c

   1 /*
   2  * Copyright 2007 Nouveau Project
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  18  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  19  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <errno.h>
  26
  27 #include "nouveau_drmif.h"
  28
  29 int
  30 nouveau_device_open_existing(struct nouveau_device **dev, int close,
  31                              int fd, drm_context_t ctx)
  32 {
  33         struct nouveau_device_priv *nvdev;
  34         int ret;
  35
  36         if (!dev || *dev)
  37             return -EINVAL;
  38
  39         nvdev = calloc(1, sizeof(*nvdev));
  40         if (!nvdev)
  41             return -ENOMEM;
  42         nvdev->fd = fd;
  43         nvdev->ctx = ctx;
  44         nvdev->needs_close = close;
  45
  46         drmCommandNone(nvdev->fd, DRM_NOUVEAU_CARD_INIT);
  47
  48         if ((ret = nouveau_bo_init(&nvdev->base))) {
  49                 nouveau_device_close((void *)&nvdev);
  50                 return ret;
  51         }
  52
  53         {
  54                 uint64_t value;
  55
  56                 ret = nouveau_device_get_param(&nvdev->base,
  57                                                NOUVEAU_GETPARAM_CHIPSET_ID,
  58                                                &value);
  59                 if (ret) {
  60                         nouveau_device_close((void *)&nvdev);
  61                         return ret;
  62                 }
  63                 nvdev->base.chipset = value;
  64         }
  65
  66         *dev = &nvdev->base;
  67         return 0;
  68 }
  69
  70 int
  71 nouveau_device_open(struct nouveau_device **dev, const char *busid)
  72 {
  73         drm_context_t ctx;
  74         int fd, ret;
  75
  76         if (!dev || *dev)
  77                 return -EINVAL;
  78
  79         fd = drmOpen("nouveau", busid);
  80         if (fd < 0)
  81                 return -EINVAL;
  82
  83         ret = drmCreateContext(fd, &ctx);
  84         if (ret) {
  85                 drmClose(fd);
  86                 return ret;
  87         }
  88
  89         ret = nouveau_device_open_existing(dev, 1, fd, ctx);
  90         if (ret) {
  91             drmDestroyContext(fd, ctx);
  92             drmClose(fd);
  93             return ret;
  94         }
  95
  96         return 0;
  97 }
  98
  99 void
 100 nouveau_device_close(struct nouveau_device **dev)
 101 {
 102         struct nouveau_device_priv *nvdev;
 103
 104         if (dev || !*dev)
 105                 return;
 106         nvdev = nouveau_device(*dev);
 107         *dev = NULL;
 108
 109         nouveau_bo_takedown(&nvdev->base);
 110
 111         if (nvdev->needs_close) {
 112                 drmDestroyContext(nvdev->fd, nvdev->ctx);
 113                 drmClose(nvdev->fd);
 114         }
 115         free(nvdev);
 116 }
 117
 118 int
 119 nouveau_device_get_param(struct nouveau_device *dev,
 120                          uint64_t param, uint64_t *value)
 121 {
 122         struct nouveau_device_priv *nvdev = nouveau_device(dev);
 123         struct drm_nouveau_getparam g;
 124         int ret;
 125
 126         if (!nvdev || !value)
 127                 return -EINVAL;
 128
 129         g.param = param;
 130         ret = drmCommandWriteRead(nvdev->fd, DRM_NOUVEAU_GETPARAM,
 131                                   &g, sizeof(g));
 132         if (ret)
 133                 return ret;
 134
 135         *value = g.value;
 136         return 0;
 137 }
 138
 139 int
 140 nouveau_device_set_param(struct nouveau_device *dev,
 141                          uint64_t param, uint64_t value)
 142 {
 143         struct nouveau_device_priv *nvdev = nouveau_device(dev);
 144         struct drm_nouveau_setparam s;
 145         int ret;
 146
 147         if (!nvdev)
 148                 return -EINVAL;
 149
 150         s.param = param;
 151         s.value = value;
 152         ret = drmCommandWriteRead(nvdev->fd, DRM_NOUVEAU_SETPARAM,
 153                                   &s, sizeof(s));
 154         if (ret)
 155                 return ret;
 156
 157         return 0;
 158 }
 159