mirror of
https://github.com/torvalds/linux.git
synced 2024-12-28 05:41:55 +00:00
418a7a7e4f
And instead wire it up as method for all the dma_map_ops instances. Note that the code seems a little fishy for dmabounce and iommu, but for now I'd like to preserve the existing behavior 1:1. Signed-off-by: Christoph Hellwig <hch@lst.de>
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
#ifndef ASMARM_DMA_IOMMU_H
|
|
#define ASMARM_DMA_IOMMU_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/mm_types.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/dma-debug.h>
|
|
#include <linux/kmemcheck.h>
|
|
#include <linux/kref.h>
|
|
|
|
#define ARM_MAPPING_ERROR (~(dma_addr_t)0x0)
|
|
|
|
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(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);
|
|
|
|
int arm_dma_supported(struct device *dev, u64 mask);
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif
|