linux/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
 * Author: Rob Clark <[email protected]>
 */

#include <linux/dma-buf.h>
#include <linux/highmem.h>

#include <drm/drm_prime.h>

#include "omap_drv.h"

MODULE_IMPORT_NS(…);

/* -----------------------------------------------------------------------------
 * DMABUF Export
 */

static struct sg_table *omap_gem_map_dma_buf(
		struct dma_buf_attachment *attachment,
		enum dma_data_direction dir)
{ … }

static void omap_gem_unmap_dma_buf(struct dma_buf_attachment *attachment,
		struct sg_table *sg, enum dma_data_direction dir)
{ … }

static int omap_gem_dmabuf_begin_cpu_access(struct dma_buf *buffer,
		enum dma_data_direction dir)
{ … }

static int omap_gem_dmabuf_end_cpu_access(struct dma_buf *buffer,
					  enum dma_data_direction dir)
{ … }

static int omap_gem_dmabuf_mmap(struct dma_buf *buffer,
		struct vm_area_struct *vma)
{ … }

static const struct dma_buf_ops omap_dmabuf_ops = …;

struct dma_buf *omap_gem_prime_export(struct drm_gem_object *obj, int flags)
{ … }

/* -----------------------------------------------------------------------------
 * DMABUF Import
 */

struct drm_gem_object *omap_gem_prime_import(struct drm_device *dev,
					     struct dma_buf *dma_buf)
{ … }