Cregit: dma-mapping.h

Contributors: 10
Author	Tokens	Token Proportion	Commits	Commit Proportion
Glauber de Oliveira Costa	32	34.78%	3	20.00%
FUJITA Tomonori	15	16.30%	2	13.33%
Jan Beulich	15	16.30%	1	6.67%
Christoph Hellwig	14	15.22%	1	6.67%
Joerg Roedel	6	6.52%	2	13.33%
Bart Van Assche	5	5.43%	2	13.33%
H. Peter Anvin	2	2.17%	1	6.67%
Paul Bolle	1	1.09%	1	6.67%
Marek Szyprowski	1	1.09%	1	6.67%
Greg Kroah-Hartman	1	1.09%	1	6.67%
Total	92		15

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_DMA_MAPPING_H
#define _ASM_X86_DMA_MAPPING_H

/*
 * IOMMU interface. See Documentation/DMA-API-HOWTO.txt and
 * Documentation/DMA-API.txt for documentation.
 */

#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
#include <asm/io.h>
#include <asm/swiotlb.h>
#include <linux/dma-contiguous.h>

#ifdef CONFIG_ISA
# define ISA_DMA_BIT_MASK DMA_BIT_MASK(24)
#else
# define ISA_DMA_BIT_MASK DMA_BIT_MASK(32)
#endif

extern int iommu_merge;
extern struct device x86_dma_fallback_dev;
extern int panic_on_overflow;

extern const struct dma_map_ops *dma_ops;

static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
	return dma_ops;
}

bool arch_dma_alloc_attrs(struct device **dev);
#define arch_dma_alloc_attrs arch_dma_alloc_attrs

#endif