dma.h

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/*
 * Copyright (c) 2016, Xilinx Inc. and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

 
#ifndef __METAL_DMA__H__
#define __METAL_DMA__H__
 
#include <stdint.h>
#include <metal/sys.h>
 
#ifdef __cplusplus
extern "C" {
#endif

 
#define METAL_DMA_DEV_R  1 
#define METAL_DMA_DEV_W  2 
#define METAL_DMA_DEV_WR 3 

struct metal_sg {
        void *virt; 
        struct metal_io_region *io; 
        int len; 
};
 
struct metal_device;

int metal_dma_map(struct metal_device *dev,
                  uint32_t dir,
                  struct metal_sg *sg_in,
                  int nents_in,
                  struct metal_sg *sg_out);

void metal_dma_unmap(struct metal_device *dev,
                     uint32_t dir,
                     struct metal_sg *sg,
                     int nents);

 
#ifdef __cplusplus
}
#endif
 
#endif /* __METAL_DMA__H__ */