1/* SPDX-License-Identifier: GPL-2.0-only */ 2/************************************************************************** 3 * Copyright (c) 2007-2008, Intel Corporation. 4 * All Rights Reserved. 5 * 6 **************************************************************************/ 7 8#ifndef _PSB_GTT_H_ 9#define _PSB_GTT_H_ 10 11#include <drm/drm_gem.h> 12 13/* This wants cleaning up with respect to the psb_dev and un-needed stuff */ 14struct psb_gtt { 15 uint32_t gatt_start; 16 uint32_t mmu_gatt_start; 17 uint32_t gtt_start; 18 uint32_t gtt_phys_start; 19 unsigned gtt_pages; 20 unsigned gatt_pages; 21 unsigned long stolen_size; 22 unsigned long vram_stolen_size; 23 struct rw_semaphore sem; 24}; 25 26/* Exported functions */ 27extern int psb_gtt_init(struct drm_device *dev, int resume); 28extern void psb_gtt_takedown(struct drm_device *dev); 29 30/* Each gtt_range describes an allocation in the GTT area */ 31struct gtt_range { 32 struct resource resource; /* Resource for our allocation */ 33 u32 offset; /* GTT offset of our object */ 34 struct drm_gem_object gem; /* GEM high level stuff */ 35 int in_gart; /* Currently in the GART (ref ct) */ 36 bool stolen; /* Backed from stolen RAM */ 37 bool mmapping; /* Is mmappable */ 38 struct page **pages; /* Backing pages if present */ 39 int npage; /* Number of backing pages */ 40}; 41 42#define to_gtt_range(x) container_of(x, struct gtt_range, gem) 43 44extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len, 45 const char *name, int backed, 46 u32 align); 47extern void psb_gtt_kref_put(struct gtt_range *gt); 48extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt); 49extern int psb_gtt_pin(struct gtt_range *gt); 50extern void psb_gtt_unpin(struct gtt_range *gt); 51extern int psb_gtt_restore(struct drm_device *dev); 52#endif 53