drivers/char/drm/drm_sarea.h

   1 /**
   2  * \file drm_sarea.h
   3  * \brief SAREA definitions
   4  *
   5  * \author Michel Dänzer <michel@daenzer.net>
   6  */
   7
   8 /*
   9  * Copyright 2002 Tungsten Graphics, Inc., Cedar Park, Texas.
  10  * All Rights Reserved.
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a
  13  * copy of this software and associated documentation files (the "Software"),
  14  * to deal in the Software without restriction, including without limitation
  15  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  16  * and/or sell copies of the Software, and to permit persons to whom the
  17  * Software is furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice (including the next
  20  * paragraph) shall be included in all copies or substantial portions of the
  21  * Software.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  24  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  25  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  26  * TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  27  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  28  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  29  * OTHER DEALINGS IN THE SOFTWARE.
  30  */
  31
  32 #ifndef _DRM_SAREA_H_
  33 #define _DRM_SAREA_H_
  34
  35 #include "drm.h"
  36
  37 /* SAREA area needs to be at least a page */
  38 #if defined(__alpha__)
  39 #define SAREA_MAX                       0x2000
  40 #elif defined(__ia64__)
  41 #define SAREA_MAX                       0x10000 /* 64kB */
  42 #else
  43 /* Intel 830M driver needs at least 8k SAREA */
  44 #define SAREA_MAX                       0x2000
  45 #endif
  46
  47 /** Maximum number of drawables in the SAREA */
  48 #define SAREA_MAX_DRAWABLES             256
  49
  50 #define SAREA_DRAWABLE_CLAIMED_ENTRY    0x80000000
  51
  52 /** SAREA drawable */
  53 typedef struct drm_sarea_drawable {
  54         unsigned int stamp;
  55         unsigned int flags;
  56 } drm_sarea_drawable_t;
  57
  58 /** SAREA frame */
  59 typedef struct drm_sarea_frame {
  60         unsigned int x;
  61         unsigned int y;
  62         unsigned int width;
  63         unsigned int height;
  64         unsigned int fullscreen;
  65 } drm_sarea_frame_t;
  66
  67 /** SAREA */
  68 typedef struct drm_sarea {
  69     /** first thing is always the DRM locking structure */
  70         drm_hw_lock_t lock;
  71     /** \todo Use readers/writer lock for drm_sarea::drawable_lock */
  72         drm_hw_lock_t drawable_lock;
  73         drm_sarea_drawable_t drawableTable[SAREA_MAX_DRAWABLES];        /**< drawables */
  74         drm_sarea_frame_t frame;        /**< frame */
  75         drm_context_t dummy_context;
  76 } drm_sarea_t;
  77
  78 #endif                          /* _DRM_SAREA_H_ */