FreeBSD/Linux Kernel Cross Reference
sys/dev/drm/drm_sarea.h

     /**
      * \file drm_sarea.h 
      * \brief SAREA definitions
      *
      * \author Michel D�zer <michel@daenzer.net>
      */
     
     /*-
      * Copyright 2002 Tungsten Graphics, Inc., Cedar Park, Texas.
     * All Rights Reserved.
     *
     * Permission is hereby granted, free of charge, to any person obtaining a
     * copy of this software and associated documentation files (the "Software"),
     * to deal in the Software without restriction, including without limitation
     * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     * and/or sell copies of the Software, and to permit persons to whom the
     * Software is furnished to do so, subject to the following conditions:
     *
     * The above copyright notice and this permission notice (including the next
     * paragraph) shall be included in all copies or substantial portions of the
     * Software.
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     * TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
     * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     * OTHER DEALINGS IN THE SOFTWARE.
     *
     * $FreeBSD$
     */
    
    #ifndef _DRM_SAREA_H_
    #define _DRM_SAREA_H_
    
    #include "dev/drm/drm.h"
    
    /* SAREA area needs to be at least a page */
    #if defined(__alpha__)
    #define SAREA_MAX                       0x2000
    #elif defined(__ia64__)
    #define SAREA_MAX                       0x10000         /* 64kB */
    #else
    /* Intel 830M driver needs at least 8k SAREA */
    #define SAREA_MAX                       0x2000
    #endif
    
    /** Maximum number of drawables in the SAREA */
    #define SAREA_MAX_DRAWABLES             256
    
    #define SAREA_DRAWABLE_CLAIMED_ENTRY    0x80000000
    
    /** SAREA drawable */
    typedef struct drm_sarea_drawable {
        unsigned int        stamp;
        unsigned int        flags;
    } drm_sarea_drawable_t;
    
    /** SAREA frame */
    typedef struct drm_sarea_frame {
        unsigned int        x;
        unsigned int        y;
        unsigned int        width;
        unsigned int        height;
        unsigned int        fullscreen;
    } drm_sarea_frame_t;
    
    /** SAREA */
    typedef struct drm_sarea {
        /** first thing is always the DRM locking structure */
        drm_hw_lock_t               lock;
        /** \todo Use readers/writer lock for drm_sarea::drawable_lock */
        drm_hw_lock_t               drawable_lock;
        drm_sarea_drawable_t        drawableTable[SAREA_MAX_DRAWABLES];     /**< drawables */
        drm_sarea_frame_t           frame;  /**< frame */
        drm_context_t               dummy_context;
    } drm_sarea_t;
    
    #endif  /* _DRM_SAREA_H_ */

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