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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2018 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#ifndef __ASM_RISCV_DMA_MAPPING_H
#define __ASM_RISCV_DMA_MAPPING_H
#include <linux/dma-direction.h>
#define dma_mapping_error(x, y) 0
static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
{
*handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len);
return (void *)*handle;
}
static inline void dma_free_coherent(void *addr)
{
free(addr);
}
static inline unsigned long dma_map_single(volatile void *vaddr, size_t len,
enum dma_data_direction dir)
{
return (unsigned long)vaddr;
}
static inline void dma_unmap_single(volatile void *vaddr, size_t len,
unsigned long paddr)
{
}
#endif /* __ASM_RISCV_DMA_MAPPING_H */
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