Cregit: Linux 6.10: dma-iommu.h

Contributors: 6
Author	Tokens	Token Proportion	Commits	Commit Proportion
Marek Szyprowski	70	58.82%	2	20.00%
Andreas Herrmann	19	15.97%	1	10.00%
Russell King	16	13.45%	3	30.00%
Hiroshi Doyu	9	7.56%	1	10.00%
Laurent Pinchart	3	2.52%	1	10.00%
Greg Kroah-Hartman	2	1.68%	2	20.00%
Total	119		10

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

#ifdef __KERNEL__

#include <linux/mm_types.h>
#include <linux/scatterlist.h>
#include <linux/kref.h>

struct dma_iommu_mapping {
	/* iommu specific data */
	struct iommu_domain	*domain;

	unsigned long		**bitmaps;	/* array of bitmaps */
	unsigned int		nr_bitmaps;	/* nr of elements in array */
	unsigned int		extensions;
	size_t			bitmap_size;	/* size of a single bitmap */
	size_t			bits;		/* per bitmap */
	dma_addr_t		base;

	spinlock_t		lock;
	struct kref		kref;
};

struct dma_iommu_mapping *
arm_iommu_create_mapping(const struct bus_type *bus, dma_addr_t base, u64 size);

void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);

int arm_iommu_attach_device(struct device *dev,
					struct dma_iommu_mapping *mapping);
void arm_iommu_detach_device(struct device *dev);

#endif /* __KERNEL__ */
#endif