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https://github.com/edk2-porting/linux-next.git
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7c1c2871a6
This is step one towards having multiple masters sharing a drm device in order to get fast-user-switching to work. It splits out the information associated with the drm master into a separate kref counted structure, and allocates this when a master opens the device node. It also allows the current master to abdicate (say while VT switched), and a new master to take over the hardware. It moves the Intel and radeon drivers to using the sarea from within the new master structures. Signed-off-by: Dave Airlie <airlied@redhat.com>
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/**
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* \file drm_sarea.h
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* \brief SAREA definitions
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*
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* \author Michel Dänzer <michel@daenzer.net>
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*/
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/*
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* Copyright 2002 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _DRM_SAREA_H_
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#define _DRM_SAREA_H_
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#include "drm.h"
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/* SAREA area needs to be at least a page */
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#if defined(__alpha__)
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#define SAREA_MAX 0x2000U
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#elif defined(__ia64__)
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#define SAREA_MAX 0x10000U /* 64kB */
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#else
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/* Intel 830M driver needs at least 8k SAREA */
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#define SAREA_MAX 0x2000U
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#endif
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/** Maximum number of drawables in the SAREA */
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#define SAREA_MAX_DRAWABLES 256
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#define SAREA_DRAWABLE_CLAIMED_ENTRY 0x80000000
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/** SAREA drawable */
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struct drm_sarea_drawable {
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unsigned int stamp;
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unsigned int flags;
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};
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/** SAREA frame */
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struct drm_sarea_frame {
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unsigned int x;
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unsigned int y;
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unsigned int width;
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unsigned int height;
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unsigned int fullscreen;
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};
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/** SAREA */
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struct drm_sarea {
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/** first thing is always the DRM locking structure */
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struct drm_hw_lock lock;
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/** \todo Use readers/writer lock for drm_sarea::drawable_lock */
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struct drm_hw_lock drawable_lock;
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struct drm_sarea_drawable drawableTable[SAREA_MAX_DRAWABLES]; /**< drawables */
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struct drm_sarea_frame frame; /**< frame */
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drm_context_t dummy_context;
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};
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#ifndef __KERNEL__
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typedef struct drm_sarea_drawable drm_sarea_drawable_t;
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typedef struct drm_sarea_frame drm_sarea_frame_t;
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typedef struct drm_sarea drm_sarea_t;
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#endif
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#endif /* _DRM_SAREA_H_ */
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