| Hiroshi DOYU | 69d3a84 | 2009-01-28 21:32:08 +0200 | [diff] [blame] | 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 __IOMMU_MMAP_H |
| 14 | #define __IOMMU_MMAP_H |
| 15 | |
| 16 | struct iovm_struct { |
| 17 | struct 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 | /* |
| 27 | * IOVMF_FLAGS: attribute for iommu virtual memory area(iovma) |
| 28 | * |
| 29 | * lower 16 bit is used for h/w and upper 16 bit is for s/w. |
| 30 | */ |
| 31 | #define IOVMF_SW_SHIFT 16 |
| 32 | #define IOVMF_HW_SIZE (1 << IOVMF_SW_SHIFT) |
| 33 | #define IOVMF_HW_MASK (IOVMF_HW_SIZE - 1) |
| 34 | #define IOVMF_SW_MASK (~IOVMF_HW_MASK)UL |
| 35 | |
| 36 | /* |
| 37 | * iovma: h/w flags derived from cam and ram attribute |
| 38 | */ |
| 39 | #define IOVMF_CAM_MASK (~((1 << 10) - 1)) |
| 40 | #define IOVMF_RAM_MASK (~IOVMF_CAM_MASK) |
| 41 | |
| 42 | #define IOVMF_PGSZ_MASK (3 << 0) |
| 43 | #define IOVMF_PGSZ_1M MMU_CAM_PGSZ_1M |
| 44 | #define IOVMF_PGSZ_64K MMU_CAM_PGSZ_64K |
| 45 | #define IOVMF_PGSZ_4K MMU_CAM_PGSZ_4K |
| 46 | #define IOVMF_PGSZ_16M MMU_CAM_PGSZ_16M |
| 47 | |
| 48 | #define IOVMF_ENDIAN_MASK (1 << 9) |
| 49 | #define IOVMF_ENDIAN_BIG MMU_RAM_ENDIAN_BIG |
| 50 | #define IOVMF_ENDIAN_LITTLE MMU_RAM_ENDIAN_LITTLE |
| 51 | |
| 52 | #define IOVMF_ELSZ_MASK (3 << 7) |
| 53 | #define IOVMF_ELSZ_8 MMU_RAM_ELSZ_8 |
| 54 | #define IOVMF_ELSZ_16 MMU_RAM_ELSZ_16 |
| 55 | #define IOVMF_ELSZ_32 MMU_RAM_ELSZ_32 |
| 56 | #define IOVMF_ELSZ_NONE MMU_RAM_ELSZ_NONE |
| 57 | |
| 58 | #define IOVMF_MIXED_MASK (1 << 6) |
| 59 | #define IOVMF_MIXED MMU_RAM_MIXED |
| 60 | |
| 61 | /* |
| 62 | * iovma: s/w flags, used for mapping and umapping internally. |
| 63 | */ |
| 64 | #define IOVMF_MMIO (1 << IOVMF_SW_SHIFT) |
| 65 | #define IOVMF_ALLOC (2 << IOVMF_SW_SHIFT) |
| 66 | #define IOVMF_ALLOC_MASK (3 << IOVMF_SW_SHIFT) |
| 67 | |
| 68 | /* "superpages" is supported just with physically linear pages */ |
| 69 | #define IOVMF_DISCONT (1 << (2 + IOVMF_SW_SHIFT)) |
| 70 | #define IOVMF_LINEAR (2 << (2 + IOVMF_SW_SHIFT)) |
| 71 | #define IOVMF_LINEAR_MASK (3 << (2 + IOVMF_SW_SHIFT)) |
| 72 | |
| 73 | #define IOVMF_DA_FIXED (1 << (4 + IOVMF_SW_SHIFT)) |
| 74 | #define IOVMF_DA_ANON (2 << (4 + IOVMF_SW_SHIFT)) |
| 75 | #define IOVMF_DA_MASK (3 << (4 + IOVMF_SW_SHIFT)) |
| 76 | |
| 77 | |
| 78 | extern struct iovm_struct *find_iovm_area(struct iommu *obj, u32 da); |
| 79 | extern u32 iommu_vmap(struct iommu *obj, u32 da, |
| 80 | const struct sg_table *sgt, u32 flags); |
| 81 | extern struct sg_table *iommu_vunmap(struct iommu *obj, u32 da); |
| 82 | extern u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes, |
| 83 | u32 flags); |
| 84 | extern void iommu_vfree(struct iommu *obj, const u32 da); |
| 85 | extern u32 iommu_kmap(struct iommu *obj, u32 da, u32 pa, size_t bytes, |
| 86 | u32 flags); |
| 87 | extern void iommu_kunmap(struct iommu *obj, u32 da); |
| 88 | extern u32 iommu_kmalloc(struct iommu *obj, u32 da, size_t bytes, |
| 89 | u32 flags); |
| 90 | extern void iommu_kfree(struct iommu *obj, u32 da); |
| 91 | |
| 92 | extern void *da_to_va(struct iommu *obj, u32 da); |
| 93 | |
| 94 | #endif /* __IOMMU_MMAP_H */ |