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1 | /* |
2 | * omap iommu: simple virtual address space management | |
3 | * | |
4 | * Copyright (C) 2008-2009 Nokia Corporation | |
5 | * | |
6 | * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #ifndef _INTEL_IOMMU_H_ | |
14 | #define _INTEL_IOMMU_H_ | |
15 | ||
16 | struct iovm_struct { | |
17 | struct omap_iommu *iommu; /* iommu object which this belongs to */ | |
18 | u32 da_start; /* area definition */ | |
19 | u32 da_end; | |
20 | u32 flags; /* IOVMF_: see below */ | |
21 | struct list_head list; /* linked in ascending order */ | |
22 | const struct sg_table *sgt; /* keep 'page' <-> 'da' mapping */ | |
23 | void *va; /* mpu side mapped address */ | |
24 | }; | |
25 | ||
26 | #define MMU_RAM_ENDIAN_SHIFT 9 | |
27 | #define MMU_RAM_ENDIAN_LITTLE (0 << MMU_RAM_ENDIAN_SHIFT) | |
28 | #define MMU_RAM_ELSZ_8 (0 << MMU_RAM_ELSZ_SHIFT) | |
29 | #define IOVMF_ENDIAN_LITTLE MMU_RAM_ENDIAN_LITTLE | |
30 | #define MMU_RAM_ELSZ_SHIFT 7 | |
31 | #define IOVMF_ELSZ_8 MMU_RAM_ELSZ_8 | |
32 | ||
33 | struct iommu_domain; | |
34 | ||
35 | extern struct iovm_struct *omap_find_iovm_area(struct device *dev, u32 da); | |
36 | extern u32 | |
37 | omap_iommu_vmap(struct iommu_domain *domain, struct device *dev, u32 da, | |
38 | const struct sg_table *sgt, u32 flags); | |
39 | extern struct sg_table *omap_iommu_vunmap(struct iommu_domain *domain, | |
40 | struct device *dev, u32 da); | |
41 | extern u32 | |
42 | omap_iommu_vmalloc(struct iommu_domain *domain, struct device *dev, | |
43 | u32 da, size_t bytes, u32 flags); | |
44 | extern void | |
45 | omap_iommu_vfree(struct iommu_domain *domain, struct device *dev, | |
46 | const u32 da); | |
47 | extern void *omap_da_to_va(struct device *dev, u32 da); | |
48 | ||
49 | extern void omap_iommu_save_ctx(struct device *dev); | |
50 | extern void omap_iommu_restore_ctx(struct device *dev); | |
51 | ||
52 | #endif |