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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Support for using dma-bufs.
*
* Copyright (C) 2022 Google LLC
*/
#ifndef __GXP_DMABUF_H__
#define __GXP_DMABUF_H__
#include <linux/dma-direction.h>
#include <linux/types.h>
#include "gxp-internal.h"
#include "gxp-mapping.h"
/**
* gxp_dmabuf_map() - Map a dma-buf for access by the specified physical cores
* @gxp: The GXP device to map the dma-buf for
* @core_list: A bitfield enumerating the physical cores the mapping is for
* @fd: A file descriptor for the dma-buf to be mapped
* @flags: The type of mapping to create; Currently unused
* @direction: DMA direction
*
* Return: The structure that was created and is being tracked to describe the
* mapping of the dma-buf. Returns ERR_PTR on failure.
*/
struct gxp_mapping *gxp_dmabuf_map(struct gxp_dev *gxp, uint core_list, int fd,
u32 flags, enum dma_data_direction dir);
/**
* gxp_dmabuf_unmap - Unmap a dma-buf previously mapped with `gxp_dmabuf_map()`
* @gxp: The GXP device the dma-buf was mapped for.
* @device_address: The IOVA the dma-buf was mapped to. Should be obtained from
* the `device_address` field of the `struct gxp_mapping`
* returned by `gxp_dmabuf_map()`
*/
void gxp_dmabuf_unmap(struct gxp_dev *gxp, dma_addr_t device_address);
#endif /* __GXP_DMABUF_H__ */
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