Line data    Source code

       1             : /* $OpenBSD: drm_agpsupport.c,v 1.26 2014/03/13 13:35:21 kettenis Exp $ */
       2             : /*-
       3             :  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
       4             :  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
       5             :  * All Rights Reserved.
       6             :  *
       7             :  * Permission is hereby granted, free of charge, to any person obtaining a
       8             :  * copy of this software and associated documentation files (the "Software"),
       9             :  * to deal in the Software without restriction, including without limitation
      10             :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      11             :  * and/or sell copies of the Software, and to permit persons to whom the
      12             :  * Software is furnished to do so, subject to the following conditions:
      13             :  *
      14             :  * The above copyright notice and this permission notice (including the next
      15             :  * paragraph) shall be included in all copies or substantial portions of the
      16             :  * Software.
      17             :  *
      18             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      19             :  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      20             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
      21             :  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
      22             :  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
      23             :  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
      24             :  * OTHER DEALINGS IN THE SOFTWARE.
      25             :  *
      26             :  * Author:
      27             :  *    Rickard E. (Rik) Faith <faith@valinux.com>
      28             :  *    Gareth Hughes <gareth@valinux.com>
      29             :  *
      30             :  */
      31             : 
      32             : /*
      33             :  * Support code for tying the kernel AGP support to DRM drivers.
      34             :  */
      35             : 
      36             : #include "drmP.h"
      37             : 
      38             : #if __OS_HAS_AGP
      39             : 
      40             : int
      41           0 : drm_agp_info(struct drm_device * dev, struct drm_agp_info *info)
      42             : {
      43             :         struct agp_info *kern;
      44             : 
      45           0 :         if (dev->agp == NULL || !dev->agp->acquired)
      46           0 :                 return (EINVAL);
      47             : 
      48           0 :         kern = &dev->agp->info;
      49           0 :         agp_get_info(dev->agp->agpdev, kern);
      50           0 :         info->agp_version_major = 1;
      51           0 :         info->agp_version_minor = 0;
      52           0 :         info->mode = kern->ai_mode;
      53           0 :         info->aperture_base = kern->ai_aperture_base;
      54           0 :         info->aperture_size = kern->ai_aperture_size;
      55           0 :         info->memory_allowed = kern->ai_memory_allowed;
      56           0 :         info->memory_used = kern->ai_memory_used;
      57           0 :         info->id_vendor = kern->ai_devid & 0xffff;
      58           0 :         info->id_device = kern->ai_devid >> 16;
      59             : 
      60           0 :         return (0);
      61           0 : }
      62             : 
      63             : int
      64           0 : drm_agp_acquire(struct drm_device *dev)
      65             : {
      66             :         int     retcode;
      67             : 
      68           0 :         if (dev->agp == NULL || dev->agp->acquired)
      69           0 :                 return (EINVAL);
      70             : 
      71           0 :         retcode = agp_acquire(dev->agp->agpdev);
      72           0 :         if (retcode)
      73           0 :                 return (retcode);
      74             : 
      75           0 :         dev->agp->acquired = 1;
      76             : 
      77           0 :         return (0);
      78           0 : }
      79             : 
      80             : int
      81           0 : drm_agp_release(struct drm_device * dev)
      82             : {
      83           0 :         if (dev->agp == NULL || !dev->agp->acquired)
      84           0 :                 return (EINVAL);
      85           0 :         agp_release(dev->agp->agpdev);
      86           0 :         dev->agp->acquired = 0;
      87             : 
      88           0 :         return (0);
      89           0 : }
      90             : 
      91             : int
      92           0 : drm_agp_enable(struct drm_device *dev, drm_agp_mode_t mode)
      93             : {
      94             :         int     retcode = 0;
      95             : 
      96           0 :         if (dev->agp == NULL || !dev->agp->acquired)
      97           0 :                 return (EINVAL);
      98             : 
      99           0 :         dev->agp->mode = mode.mode;
     100           0 :         if ((retcode = agp_enable(dev->agp->agpdev, mode.mode)) == 0)
     101           0 :                 dev->agp->enabled = 1;
     102           0 :         return (retcode);
     103           0 : }
     104             : 
     105             : void
     106           0 : drm_agp_takedown(struct drm_device *dev)
     107             : {
     108           0 :         if (dev->agp == NULL)
     109             :                 return;
     110             : 
     111           0 :         drm_agp_release(dev);
     112           0 :         dev->agp->enabled  = 0;
     113           0 : }
     114             : 
     115             : struct drm_agp_head *
     116           0 : drm_agp_init(void)
     117             : {
     118             :         struct agp_softc        *agpdev;
     119             :         struct drm_agp_head     *head = NULL;
     120             :         int                      agp_available = 1;
     121             : 
     122           0 :         agpdev = agp_find_device(0);
     123           0 :         if (agpdev == NULL)
     124           0 :                 agp_available = 0;
     125             : 
     126             :         DRM_DEBUG("agp_available = %d\n", agp_available);
     127             : 
     128           0 :         if (agp_available) {
     129           0 :                 head = drm_calloc(1, sizeof(*head));
     130           0 :                 if (head == NULL)
     131           0 :                         return (NULL);
     132           0 :                 head->agpdev = agpdev;
     133           0 :                 agp_get_info(agpdev, &head->info);
     134           0 :                 head->base = head->info.ai_aperture_base;
     135           0 :                 head->cant_use_aperture = (head->base == 0);
     136           0 :                 TAILQ_INIT(&head->memory);
     137           0 :         }
     138           0 :         return (head);
     139           0 : }
     140             : 
     141             : #endif /* __OS_HAS_AGP */