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      1 /*	$NetBSD: drm_sarea.h,v 1.2 2021/12/18 23:45:46 riastradh Exp $	*/
      2 
      3 /**
      4  * \file drm_sarea.h
      5  * \brief SAREA definitions
      6  *
      7  * \author Michel Dnzer <michel (at) daenzer.net>
      8  */
      9 
     10 /*
     11  * Copyright 2002 Tungsten Graphics, Inc., Cedar Park, Texas.
     12  * All Rights Reserved.
     13  *
     14  * Permission is hereby granted, free of charge, to any person obtaining a
     15  * copy of this software and associated documentation files (the "Software"),
     16  * to deal in the Software without restriction, including without limitation
     17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     18  * and/or sell copies of the Software, and to permit persons to whom the
     19  * Software is furnished to do so, subject to the following conditions:
     20  *
     21  * The above copyright notice and this permission notice (including the next
     22  * paragraph) shall be included in all copies or substantial portions of the
     23  * Software.
     24  *
     25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     26  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     27  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     28  * TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
     29  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     30  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     31  * OTHER DEALINGS IN THE SOFTWARE.
     32  */
     33 
     34 #ifndef _DRM_SAREA_H_
     35 #define _DRM_SAREA_H_
     36 
     37 #include "drm.h"
     38 
     39 #if defined(__cplusplus)
     40 extern "C" {
     41 #endif
     42 
     43 /* SAREA area needs to be at least a page */
     44 #if defined(__alpha__)
     45 #define SAREA_MAX                       0x2000U
     46 #elif defined(__mips__)
     47 #define SAREA_MAX                       0x4000U
     48 #elif defined(__ia64__)
     49 #define SAREA_MAX                       0x10000U	/* 64kB */
     50 #else
     51 /* Intel 830M driver needs at least 8k SAREA */
     52 #define SAREA_MAX                       0x2000U
     53 #endif
     54 
     55 /** Maximum number of drawables in the SAREA */
     56 #define SAREA_MAX_DRAWABLES		256
     57 
     58 #define SAREA_DRAWABLE_CLAIMED_ENTRY    0x80000000
     59 
     60 /** SAREA drawable */
     61 struct drm_sarea_drawable {
     62 	unsigned int stamp;
     63 	unsigned int flags;
     64 };
     65 
     66 /** SAREA frame */
     67 struct drm_sarea_frame {
     68 	unsigned int x;
     69 	unsigned int y;
     70 	unsigned int width;
     71 	unsigned int height;
     72 	unsigned int fullscreen;
     73 };
     74 
     75 /** SAREA */
     76 struct drm_sarea {
     77     /** first thing is always the DRM locking structure */
     78 	struct drm_hw_lock lock;
     79     /** \todo Use readers/writer lock for drm_sarea::drawable_lock */
     80 	struct drm_hw_lock drawable_lock;
     81 	struct drm_sarea_drawable drawableTable[SAREA_MAX_DRAWABLES];	/**< drawables */
     82 	struct drm_sarea_frame frame;	/**< frame */
     83 	drm_context_t dummy_context;
     84 };
     85 
     86 #ifndef __KERNEL__
     87 typedef struct drm_sarea_drawable drm_sarea_drawable_t;
     88 typedef struct drm_sarea_frame drm_sarea_frame_t;
     89 typedef struct drm_sarea drm_sarea_t;
     90 #endif
     91 
     92 #if defined(__cplusplus)
     93 }
     94 #endif
     95 
     96 #endif				/* _DRM_SAREA_H_ */
     97