linux/drivers/gpu/drm/gma500/gtt.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2007, Intel Corporation.
 * All Rights Reserved.
 *
 * Authors: Thomas Hellstrom <thomas-at-tungstengraphics.com>
 *	    Alan Cox <[email protected]>
 */

#include "gem.h" /* TODO: for struct psb_gem_object, see psb_gtt_restore() */
#include "psb_drv.h"


/*
 *	GTT resource allocator - manage page mappings in GTT space
 */

int psb_gtt_allocate_resource(struct drm_psb_private *pdev, struct resource *res,
			      const char *name, resource_size_t size, resource_size_t align,
			      bool stolen, u32 *offset)
{ … }

/**
 *	psb_gtt_mask_pte	-	generate GTT pte entry
 *	@pfn: page number to encode
 *	@type: type of memory in the GTT
 *
 *	Set the GTT entry for the appropriate memory type.
 */
uint32_t psb_gtt_mask_pte(uint32_t pfn, int type)
{ … }

static u32 __iomem *psb_gtt_entry(struct drm_psb_private *pdev, const struct resource *res)
{ … }

/* Acquires GTT mutex internally. */
void psb_gtt_insert_pages(struct drm_psb_private *pdev, const struct resource *res,
			  struct page **pages)
{ … }

/* Acquires GTT mutex internally. */
void psb_gtt_remove_pages(struct drm_psb_private *pdev, const struct resource *res)
{ … }

static int psb_gtt_enable(struct drm_psb_private *dev_priv)
{ … }

static void psb_gtt_disable(struct drm_psb_private *dev_priv)
{ … }

void psb_gtt_fini(struct drm_device *dev)
{ … }

/* Clear GTT. Use a scratch page to avoid accidents or scribbles. */
static void psb_gtt_clear(struct drm_psb_private *pdev)
{ … }

static void psb_gtt_init_ranges(struct drm_psb_private *dev_priv)
{ … }

int psb_gtt_init(struct drm_device *dev)
{ … }

int psb_gtt_resume(struct drm_device *dev)
{ … }