release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/gpu/drm/via/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(struct drm_device *dev, drm_via_init_t *init)
  29 {
  30         drm_via_private_t *dev_priv = dev->dev_private;
  31
  32         DRM_DEBUG("\n");
  33
  34         dev_priv->sarea = drm_getsarea(dev);
  35         if (!dev_priv->sarea) {
  36                 DRM_ERROR("could not find sarea!\n");
  37                 dev->dev_private = (void *)dev_priv;
  38                 via_do_cleanup_map(dev);
  39                 return -EINVAL;
  40         }
  41
  42         dev_priv->fb = drm_core_findmap(dev, init->fb_offset);
  43         if (!dev_priv->fb) {
  44                 DRM_ERROR("could not find framebuffer!\n");
  45                 dev->dev_private = (void *)dev_priv;
  46                 via_do_cleanup_map(dev);
  47                 return -EINVAL;
  48         }
  49         dev_priv->mmio = drm_core_findmap(dev, init->mmio_offset);
  50         if (!dev_priv->mmio) {
  51                 DRM_ERROR("could not find mmio region!\n");
  52                 dev->dev_private = (void *)dev_priv;
  53                 via_do_cleanup_map(dev);
  54                 return -EINVAL;
  55         }
  56
  57         dev_priv->sarea_priv =
  58             (drm_via_sarea_t *) ((u8 *) dev_priv->sarea->handle +
  59                                  init->sarea_priv_offset);
  60
  61         dev_priv->agpAddr = init->agpAddr;
  62
  63         via_init_futex(dev_priv);
  64
  65         via_init_dmablit(dev);
  66
  67         dev->dev_private = (void *)dev_priv;
  68         return 0;
  69 }
  70
  71 int via_do_cleanup_map(struct drm_device *dev)
  72 {
  73         via_dma_cleanup(dev);
  74
  75         return 0;
  76 }
  77
  78 int via_map_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
  79 {
  80         drm_via_init_t *init = data;
  81
  82         DRM_DEBUG("\n");
  83
  84         switch (init->func) {
  85         case VIA_INIT_MAP:
  86                 return via_do_init_map(dev, init);
  87         case VIA_CLEANUP_MAP:
  88                 return via_do_cleanup_map(dev);
  89         }
  90
  91         return -EINVAL;
  92 }
  93
  94 int via_driver_load(struct drm_device *dev, unsigned long chipset)
  95 {
  96         drm_via_private_t *dev_priv;
  97         int ret = 0;
  98
  99         dev_priv = kzalloc(sizeof(drm_via_private_t), GFP_KERNEL);
 100         if (dev_priv == NULL)
 101                 return -ENOMEM;
 102
 103         dev->dev_private = (void *)dev_priv;
 104
 105         dev_priv->chipset = chipset;
 106
 107         ret = drm_sman_init(&dev_priv->sman, 2, 12, 8);
 108         if (ret) {
 109                 kfree(dev_priv);
 110                 return ret;
 111         }
 112
 113         ret = drm_vblank_init(dev, 1);
 114         if (ret) {
 115                 drm_sman_takedown(&dev_priv->sman);
 116                 kfree(dev_priv);
 117                 return ret;
 118         }
 119
 120         return 0;
 121 }
 122
 123 int via_driver_unload(struct drm_device *dev)
 124 {
 125         drm_via_private_t *dev_priv = dev->dev_private;
 126
 127         drm_sman_takedown(&dev_priv->sman);
 128
 129         kfree(dev_priv);
 130
 131         return 0;
 132 }