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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/include/asm/dma-iommu.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/include/asm/dma-iommu.h')
-rw-r--r-- | arch/arm/include/asm/dma-iommu.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/include/asm/dma-iommu.h b/arch/arm/include/asm/dma-iommu.h new file mode 100644 index 000000000..fe9ef6f79 --- /dev/null +++ b/arch/arm/include/asm/dma-iommu.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef ASMARM_DMA_IOMMU_H +#define ASMARM_DMA_IOMMU_H + +#ifdef __KERNEL__ + +#include <linux/mm_types.h> +#include <linux/scatterlist.h> +#include <linux/kref.h> + +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); + +#endif /* __KERNEL__ */ +#endif |