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/**************************************************************************
* 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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