include/linux/dma-mapping-fast.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
 */

#ifndef __LINUX_DMA_MAPPING_FAST_H
#define __LINUX_DMA_MAPPING_FAST_H

#include <linux/iommu.h>
#include <linux/io-pgtable-fast.h>

struct dma_iommu_mapping;

struct dma_fast_smmu_mapping {
	struct device		*dev;
	struct iommu_domain	*domain;
	dma_addr_t	 base;
	size_t		 size;
	size_t		 num_4k_pages;

	u32		min_iova_align;
	struct page	*guard_page;

	unsigned int	bitmap_size;
	unsigned long	*bitmap;
	unsigned long	next_start;
	unsigned long	upcoming_stale_bit;
	bool		have_stale_tlbs;

	dma_addr_t	pgtbl_dma_handle;
	av8l_fast_iopte	*pgtbl_pmds;

	spinlock_t	lock;
	struct notifier_block notifier;

	int		is_smmu_pt_coherent;
};

#ifdef CONFIG_IOMMU_IO_PGTABLE_FAST
int fast_smmu_init_mapping(struct device *dev,
			    struct dma_iommu_mapping *mapping);
void fast_smmu_release_mapping(struct kref *kref);
#else
static inline int fast_smmu_init_mapping(struct device *dev,
					  struct dma_iommu_mapping *mapping)
{
	return -ENODEV;
}

static inline void fast_smmu_release_mapping(struct kref *kref)
{
}
#endif

#endif /* __LINUX_DMA_MAPPING_FAST_H */