Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
Marek Szyprowski | 4ce63fc | 2012-05-16 15:48:21 +0200 | [diff] [blame] | 2 | #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 Pinchart | 3e3a182 | 2012-12-16 13:32:03 +0100 | [diff] [blame] | 11 | #include <linux/kref.h> |
Marek Szyprowski | 4ce63fc | 2012-05-16 15:48:21 +0200 | [diff] [blame] | 12 | |
Christoph Hellwig | 9eef8b8 | 2017-05-22 10:53:03 +0200 | [diff] [blame] | 13 | #define ARM_MAPPING_ERROR (~(dma_addr_t)0x0) |
| 14 | |
Marek Szyprowski | 4ce63fc | 2012-05-16 15:48:21 +0200 | [diff] [blame] | 15 | struct dma_iommu_mapping { |
| 16 | /* iommu specific data */ |
| 17 | struct iommu_domain *domain; |
| 18 | |
Andreas Herrmann | 4d852ef | 2014-02-25 13:09:53 +0100 | [diff] [blame] | 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 */ |
Marek Szyprowski | 4ce63fc | 2012-05-16 15:48:21 +0200 | [diff] [blame] | 24 | dma_addr_t base; |
| 25 | |
| 26 | spinlock_t lock; |
| 27 | struct kref kref; |
| 28 | }; |
| 29 | |
| 30 | struct dma_iommu_mapping * |
Marek Szyprowski | 1424532 | 2015-04-29 11:29:19 +0100 | [diff] [blame] | 31 | arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size); |
Marek Szyprowski | 4ce63fc | 2012-05-16 15:48:21 +0200 | [diff] [blame] | 32 | |
| 33 | void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping); |
| 34 | |
| 35 | int arm_iommu_attach_device(struct device *dev, |
| 36 | struct dma_iommu_mapping *mapping); |
Hiroshi Doyu | 6fe3675 | 2013-01-24 15:16:57 +0200 | [diff] [blame] | 37 | void arm_iommu_detach_device(struct device *dev); |
Marek Szyprowski | 4ce63fc | 2012-05-16 15:48:21 +0200 | [diff] [blame] | 38 | |
Christoph Hellwig | 418a7a7 | 2017-05-22 11:20:18 +0200 | [diff] [blame] | 39 | int arm_dma_supported(struct device *dev, u64 mask); |
| 40 | |
Marek Szyprowski | 4ce63fc | 2012-05-16 15:48:21 +0200 | [diff] [blame] | 41 | #endif /* __KERNEL__ */ |
| 42 | #endif |