2 * omap iommu: simple virtual address space management
4 * Copyright (C) 2008-2009 Nokia Corporation
6 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
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.
13 #ifndef __IOMMU_MMAP_H
14 #define __IOMMU_MMAP_H
17 struct iommu *iommu; /* iommu object which this belongs to */
18 u32 da_start; /* area definition */
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 */
27 * IOVMF_FLAGS: attribute for iommu virtual memory area(iovma)
29 * lower 16 bit is used for h/w and upper 16 bit is for s/w.
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
37 * iovma: h/w flags derived from cam and ram attribute
39 #define IOVMF_CAM_MASK (~((1 << 10) - 1))
40 #define IOVMF_RAM_MASK (~IOVMF_CAM_MASK)
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
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
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
58 #define IOVMF_MIXED_MASK (1 << 6)
59 #define IOVMF_MIXED MMU_RAM_MIXED
62 * iovma: s/w flags, used for mapping and umapping internally.
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)
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))
73 #define IOVMF_DA_FIXED (1 << (4 + IOVMF_SW_SHIFT))
76 extern struct iovm_struct *find_iovm_area(struct iommu *obj, u32 da);
77 extern u32 iommu_vmap(struct iommu *obj, u32 da,
78 const struct sg_table *sgt, u32 flags);
79 extern struct sg_table *iommu_vunmap(struct iommu *obj, u32 da);
80 extern u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes,
82 extern void iommu_vfree(struct iommu *obj, const u32 da);
83 extern u32 iommu_kmap(struct iommu *obj, u32 da, u32 pa, size_t bytes,
85 extern void iommu_kunmap(struct iommu *obj, u32 da);
86 extern u32 iommu_kmalloc(struct iommu *obj, u32 da, size_t bytes,
88 extern void iommu_kfree(struct iommu *obj, u32 da);
90 extern void *da_to_va(struct iommu *obj, u32 da);
92 #endif /* __IOMMU_MMAP_H */