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#ifndef ASMARM_DMA_IOMMU_H
#define ASMARM_DMA_IOMMU_H
#ifdef __KERNEL__
#include <linux/err.h>
#include <linux/mm_types.h>
#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
#include <linux/kmemcheck.h>
#include <linux/kref.h>
#include <linux/dma-mapping-fast.h>
struct dma_iommu_mapping {
/* iommu specific data */
struct iommu_domain *domain;
void *bitmap;
size_t bits;
dma_addr_t base;
spinlock_t lock;
struct kref kref;
struct dma_fast_smmu_mapping *fast;
};
#ifdef CONFIG_ARM64_DMA_USE_IOMMU
struct dma_iommu_mapping *
arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t 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);
#else /* !CONFIG_ARM64_DMA_USE_IOMMU */
static inline struct dma_iommu_mapping *
arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size)
{
return ERR_PTR(-ENOMEM);
}
static inline void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping)
{
}
static inline int arm_iommu_attach_device(struct device *dev,
struct dma_iommu_mapping *mapping)
{
return -ENODEV;
}
static inline void arm_iommu_detach_device(struct device *dev)
{
}
#endif /* CONFIG_ARM64_DMA_USE_IOMMU */
#endif /* __KERNEL__ */
#endif
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