src/gallium/winsys/dri/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         *dev = &nvdev->base;
  54         return 0;
  55 }
  56
  57 int
  58 nouveau_device_open(struct nouveau_device **dev, const char *busid)
  59 {
  60         drm_context_t ctx;
  61         int fd, ret;
  62
  63         if (!dev || *dev)
  64                 return -EINVAL;
  65
  66         fd = drmOpen("nouveau", busid);
  67         if (fd < 0)
  68                 return -EINVAL;
  69
  70         ret = drmCreateContext(fd, &ctx);
  71         if (ret) {
  72                 drmClose(fd);
  73                 return ret;
  74         }
  75
  76         ret = nouveau_device_open_existing(dev, 1, fd, ctx);
  77         if (ret) {
  78             drmDestroyContext(fd, ctx);
  79             drmClose(fd);
  80             return ret;
  81         }
  82
  83         return 0;
  84 }
  85
  86 void
  87 nouveau_device_close(struct nouveau_device **dev)
  88 {
  89         struct nouveau_device_priv *nvdev;
  90
  91         if (dev || !*dev)
  92                 return;
  93         nvdev = nouveau_device(*dev);
  94         *dev = NULL;
  95
  96         nouveau_bo_takedown(&nvdev->base);
  97
  98         if (nvdev->needs_close) {
  99                 drmDestroyContext(nvdev->fd, nvdev->ctx);
 100                 drmClose(nvdev->fd);
 101         }
 102         free(nvdev);
 103 }
 104
 105 int
 106 nouveau_device_get_param(struct nouveau_device *dev,
 107                          uint64_t param, uint64_t *value)
 108 {
 109         struct nouveau_device_priv *nvdev = nouveau_device(dev);
 110         struct drm_nouveau_getparam g;
 111         int ret;
 112
 113         if (!nvdev || !value)
 114                 return -EINVAL;
 115
 116         g.param = param;
 117         ret = drmCommandWriteRead(nvdev->fd, DRM_NOUVEAU_GETPARAM,
 118                                   &g, sizeof(g));
 119         if (ret)
 120                 return ret;
 121
 122         *value = g.value;
 123         return 0;
 124 }
 125
 126 int
 127 nouveau_device_set_param(struct nouveau_device *dev,
 128                          uint64_t param, uint64_t value)
 129 {
 130         struct nouveau_device_priv *nvdev = nouveau_device(dev);
 131         struct drm_nouveau_setparam s;
 132         int ret;
 133
 134         if (!nvdev)
 135                 return -EINVAL;
 136
 137         s.param = param;
 138         s.value = value;
 139         ret = drmCommandWriteRead(nvdev->fd, DRM_NOUVEAU_SETPARAM,
 140                                   &s, sizeof(s));
 141         if (ret)
 142                 return ret;
 143
 144         return 0;
 145 }
 146