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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - arch/arm/include/asm/dma-iommu.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef ASMARM_DMA_IOMMU_H
3 #define ASMARM_DMA_IOMMU_H
7 #include <linux/mm_types.h>
8 #include <linux/scatterlist.h>
9 #include <linux/dma-debug.h>
10 #include <linux/kmemcheck.h>
11 #include <linux/kref.h>
13 #define ARM_MAPPING_ERROR (~(dma_addr_t)0x0)
15 struct dma_iommu_mapping
{
16 /* iommu specific data */
17 struct iommu_domain
*domain
;
19 unsigned long **bitmaps
; /* array of bitmaps */
20 unsigned int nr_bitmaps
; /* nr of elements in array */
21 unsigned int extensions
;
22 size_t bitmap_size
; /* size of a single bitmap */
23 size_t bits
; /* per bitmap */
30 struct dma_iommu_mapping
*
31 arm_iommu_create_mapping(struct bus_type
*bus
, dma_addr_t base
, u64 size
);
33 void arm_iommu_release_mapping(struct dma_iommu_mapping
*mapping
);
35 int arm_iommu_attach_device(struct device
*dev
,
36 struct dma_iommu_mapping
*mapping
);
37 void arm_iommu_detach_device(struct device
*dev
);
39 int arm_dma_supported(struct device
*dev
, u64 mask
);
41 #endif /* __KERNEL__ */