kernel_samsung_a34x-permissive/include/linux/dma-mapping-fast.h
2024-04-28 15:51:13 +02:00

53 lines
1.2 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* 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 io_pgtable_ops;
struct iova_domain;
struct dma_fast_smmu_mapping {
struct device *dev;
struct iommu_domain *domain;
struct iova_domain *iovad;
dma_addr_t base;
size_t size;
size_t num_4k_pages;
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;
struct io_pgtable_ops *pgtbl_ops;
spinlock_t lock;
struct notifier_block notifier;
};
#ifdef CONFIG_IOMMU_IO_PGTABLE_FAST
int fast_smmu_init_mapping(struct device *dev,
struct dma_iommu_mapping *mapping);
void fast_smmu_put_dma_cookie(struct iommu_domain *domain);
#else
static inline int fast_smmu_init_mapping(struct device *dev,
struct dma_iommu_mapping *mapping)
{
return -ENODEV;
}
static inline void fast_smmu_put_dma_cookie(struct iommu_domain *domain) {}
#endif
#endif /* __LINUX_DMA_MAPPING_FAST_H */