Release 4.7 drivers/gpu/drm/gma500/gtt.h

/**************************************************************************
 * Copyright (c) 2007-2008, Intel Corporation.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 **************************************************************************/

#ifndef _PSB_GTT_H_

#define _PSB_GTT_H_

#include <drm/drmP.h>
#include <drm/drm_gem.h>

/* This wants cleaning up with respect to the psb_dev and un-needed stuff */

struct psb_gtt {
	
uint32_t gatt_start;
	
uint32_t mmu_gatt_start;
	
uint32_t gtt_start;
	
uint32_t gtt_phys_start;
	
unsigned gtt_pages;
	
unsigned gatt_pages;
	
unsigned long stolen_size;
	
unsigned long vram_stolen_size;
	
struct rw_semaphore sem;
};

/* Exported functions */
extern int psb_gtt_init(struct drm_device *dev, int resume);
extern void psb_gtt_takedown(struct drm_device *dev);

/* Each gtt_range describes an allocation in the GTT area */

struct gtt_range {
	
struct resource resource;	/* Resource for our allocation */
	
u32 offset;			/* GTT offset of our object */
	
struct drm_gem_object gem;	/* GEM high level stuff */
	
int in_gart;			/* Currently in the GART (ref ct) */
	
bool stolen;			/* Backed from stolen RAM */
	
bool mmapping;			/* Is mmappable */
	
struct page **pages;		/* Backing pages if present */
	
int npage;			/* Number of backing pages */
	
int roll;			/* Roll applied to the GTT entries */
};

extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len,
					     const char *name, int backed,
					     u32 align);
extern void psb_gtt_kref_put(struct gtt_range *gt);
extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt);
extern int psb_gtt_pin(struct gtt_range *gt);
extern void psb_gtt_unpin(struct gtt_range *gt);
extern void psb_gtt_roll(struct drm_device *dev,
					struct gtt_range *gt, int roll);
extern int psb_gtt_restore(struct drm_device *dev);
#endif
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Directory: drivers/gpu/drm/gma500

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