/* SPDX-License-Identifier: MIT */
/**
 * \file drm_sarea.h
 * \brief SAREA definitions
 *
 * \author Michel Dänzer <michel@daenzer.net>
 */

/*
 * Copyright 2002 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 */

#ifndef _DRM_SAREA_H_
#define _DRM_SAREA_H_

#include "drm.h"

#if defined(__cplusplus)
extern "C" {
#endif

/* SAREA area needs to be at least a page */
#if defined(__alpha__)
#define SAREA_MAX                       0x2000U
#elif defined(__mips__)
#define SAREA_MAX                       0x4000U
#elif defined(__ia64__)
#define SAREA_MAX                       0x10000U        /* 64kB */
#else
/* Intel 830M driver needs at least 8k SAREA */
#define SAREA_MAX                       0x2000U
#endif

/** Maximum number of drawables in the SAREA */
#define SAREA_MAX_DRAWABLES             256

#define SAREA_DRAWABLE_CLAIMED_ENTRY    0x80000000

/** SAREA drawable */
struct drm_sarea_drawable {
        unsigned int stamp;
        unsigned int flags;
};

/** SAREA frame */
struct drm_sarea_frame {
        unsigned int x;
        unsigned int y;
        unsigned int width;
        unsigned int height;
        unsigned int fullscreen;
};

/** SAREA */
struct drm_sarea {
    /** first thing is always the DRM locking structure */
        struct drm_hw_lock lock;
    /** \todo Use readers/writer lock for drm_sarea::drawable_lock */
        struct drm_hw_lock drawable_lock;
        struct drm_sarea_drawable drawableTable[SAREA_MAX_DRAWABLES];   /**< drawables */
        struct drm_sarea_frame frame;   /**< frame */
        drm_context_t dummy_context;
};

#ifndef __KERNEL__
typedef struct drm_sarea_drawable drm_sarea_drawable_t;
typedef struct drm_sarea_frame drm_sarea_frame_t;
typedef struct drm_sarea drm_sarea_t;
#endif

#if defined(__cplusplus)
}
#endif

#endif                          /* _DRM_SAREA_H_ */