drivers/char/drm/via_map.c

   1 /*
   2  * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial portions
  14  * of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24 #include "drmP.h"
  25 #include "via_drm.h"
  26 #include "via_drv.h"
  27
  28 static int via_do_init_map(drm_device_t * dev, drm_via_init_t * init)
  29 {
  30         drm_via_private_t *dev_priv;
  31
  32         DRM_DEBUG("%s\n", __FUNCTION__);
  33
  34         dev_priv = drm_alloc(sizeof(drm_via_private_t), DRM_MEM_DRIVER);
  35         if (dev_priv == NULL)
  36                 return -ENOMEM;
  37
  38         memset(dev_priv, 0, sizeof(drm_via_private_t));
  39
  40         DRM_GETSAREA();
  41         if (!dev_priv->sarea) {
  42                 DRM_ERROR("could not find sarea!\n");
  43                 dev->dev_private = (void *)dev_priv;
  44                 via_do_cleanup_map(dev);
  45                 return -EINVAL;
  46         }
  47
  48         dev_priv->fb = drm_core_findmap(dev, init->fb_offset);
  49         if (!dev_priv->fb) {
  50                 DRM_ERROR("could not find framebuffer!\n");
  51                 dev->dev_private = (void *)dev_priv;
  52                 via_do_cleanup_map(dev);
  53                 return -EINVAL;
  54         }
  55         dev_priv->mmio = drm_core_findmap(dev, init->mmio_offset);
  56         if (!dev_priv->mmio) {
  57                 DRM_ERROR("could not find mmio region!\n");
  58                 dev->dev_private = (void *)dev_priv;
  59                 via_do_cleanup_map(dev);
  60                 return -EINVAL;
  61         }
  62
  63         dev_priv->sarea_priv =
  64             (drm_via_sarea_t *) ((u8 *) dev_priv->sarea->handle +
  65                                  init->sarea_priv_offset);
  66
  67         dev_priv->agpAddr = init->agpAddr;
  68
  69         via_init_futex(dev_priv);
  70         dev_priv->pro_group_a = (dev->pdev->device == 0x3118);
  71
  72         dev->dev_private = (void *)dev_priv;
  73         return 0;
  74 }
  75
  76 int via_do_cleanup_map(drm_device_t * dev)
  77 {
  78         if (dev->dev_private) {
  79
  80                 drm_via_private_t *dev_priv = dev->dev_private;
  81
  82                 via_dma_cleanup(dev);
  83
  84                 drm_free(dev_priv, sizeof(drm_via_private_t), DRM_MEM_DRIVER);
  85                 dev->dev_private = NULL;
  86         }
  87
  88         return 0;
  89 }
  90
  91 int via_map_init(DRM_IOCTL_ARGS)
  92 {
  93         DRM_DEVICE;
  94         drm_via_init_t init;
  95
  96         DRM_DEBUG("%s\n", __FUNCTION__);
  97
  98         DRM_COPY_FROM_USER_IOCTL(init, (drm_via_init_t __user *) data,
  99                                  sizeof(init));
 100
 101         switch (init.func) {
 102         case VIA_INIT_MAP:
 103                 return via_do_init_map(dev, &init);
 104         case VIA_CLEANUP_MAP:
 105                 return via_do_cleanup_map(dev);
 106         }
 107
 108         return -EINVAL;
 109 }