mirror of https://gitee.com/openkylin/linux.git
56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/**************************************************************************
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* Copyright (c) 2007-2008, Intel Corporation.
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* All Rights Reserved.
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*
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**************************************************************************/
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#ifndef _PSB_GTT_H_
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#define _PSB_GTT_H_
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#include <drm/drm_gem.h>
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/* This wants cleaning up with respect to the psb_dev and un-needed stuff */
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struct psb_gtt {
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uint32_t gatt_start;
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uint32_t mmu_gatt_start;
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uint32_t gtt_start;
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uint32_t gtt_phys_start;
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unsigned gtt_pages;
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unsigned gatt_pages;
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unsigned long stolen_size;
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unsigned long vram_stolen_size;
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struct rw_semaphore sem;
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};
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/* Exported functions */
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extern int psb_gtt_init(struct drm_device *dev, int resume);
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extern void psb_gtt_takedown(struct drm_device *dev);
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/* Each gtt_range describes an allocation in the GTT area */
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struct gtt_range {
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struct resource resource; /* Resource for our allocation */
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u32 offset; /* GTT offset of our object */
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struct drm_gem_object gem; /* GEM high level stuff */
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int in_gart; /* Currently in the GART (ref ct) */
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bool stolen; /* Backed from stolen RAM */
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bool mmapping; /* Is mmappable */
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struct page **pages; /* Backing pages if present */
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int npage; /* Number of backing pages */
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int roll; /* Roll applied to the GTT entries */
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};
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#define to_gtt_range(x) container_of(x, struct gtt_range, gem)
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extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len,
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const char *name, int backed,
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u32 align);
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extern void psb_gtt_kref_put(struct gtt_range *gt);
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extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt);
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extern int psb_gtt_pin(struct gtt_range *gt);
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extern void psb_gtt_unpin(struct gtt_range *gt);
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extern void psb_gtt_roll(struct drm_device *dev,
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struct gtt_range *gt, int roll);
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extern int psb_gtt_restore(struct drm_device *dev);
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#endif
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