Commit f728ed91 authored by Juxin Gao's avatar Juxin Gao Committed by Hongchen Zhang
Browse files

LoongArch: Add swiotlb backups buffer 

LoongArch inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I7AHL9



--------------------------------

Change-Id: I1b627be7ca7bd3690a175b3334c088e445278504
Signed-off-by: default avatarJuxin Gao <gaojuxin@loongson.cn>
Signed-off-by: default avatarHongchen Zhang <zhanghongchen@loongson.cn>
parent c9c2b924

arch/loongarch/include/asm/dma-mapping.h

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+20 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Copyright (C) 2020 Loongson Technology Corporation Limited

 */

#ifndef _ASM_DMA_MAPPING_H

#define _ASM_DMA_MAPPING_H



extern const struct dma_map_ops loongson_dma_ops;

extern bool swiotlb_need_fix;

extern phys_addr_t io_tlb_start;



static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)

{

	if (swiotlb_need_fix)

		return &loongson_dma_ops;

	else

		return NULL;

}



#endif /* _ASM_DMA_MAPPING_H */

arch/loongarch/kernel/dma.c

+864 −0

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