text: /**************************************************************************
   * 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
  