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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +02002#ifndef ASMARM_DMA_IOMMU_H
3#define ASMARM_DMA_IOMMU_H
4
5#ifdef __KERNEL__
6
7#include <linux/mm_types.h>
8#include <linux/scatterlist.h>
9#include <linux/dma-debug.h>
10#include <linux/kmemcheck.h>
Laurent Pinchart3e3a1822012-12-16 13:32:03 +010011#include <linux/kref.h>
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +020012
Christoph Hellwig9eef8b82017-05-22 10:53:03 +020013#define ARM_MAPPING_ERROR (~(dma_addr_t)0x0)
14
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +020015struct dma_iommu_mapping {
16 /* iommu specific data */
17 struct iommu_domain *domain;
18
Andreas Herrmann4d852ef2014-02-25 13:09:53 +010019 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 */
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +020024 dma_addr_t base;
25
26 spinlock_t lock;
27 struct kref kref;
28};
29
30struct dma_iommu_mapping *
Marek Szyprowski14245322015-04-29 11:29:19 +010031arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size);
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +020032
33void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);
34
35int arm_iommu_attach_device(struct device *dev,
36 struct dma_iommu_mapping *mapping);
Hiroshi Doyu6fe36752013-01-24 15:16:57 +020037void arm_iommu_detach_device(struct device *dev);
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +020038
Christoph Hellwig418a7a72017-05-22 11:20:18 +020039int arm_dma_supported(struct device *dev, u64 mask);
40
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +020041#endif /* __KERNEL__ */
42#endif