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 16struct 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 78extern struct iovm_struct *find_iovm_area(struct iommu *obj, u32 da); 79extern u32 iommu_vmap(struct iommu *obj, u32 da, 80 const struct sg_table *sgt, u32 flags); 81extern struct sg_table *iommu_vunmap(struct iommu *obj, u32 da); 82extern u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes, 83 u32 flags); 84extern void iommu_vfree(struct iommu *obj, const u32 da); 85extern u32 iommu_kmap(struct iommu *obj, u32 da, u32 pa, size_t bytes, 86 u32 flags); 87extern void iommu_kunmap(struct iommu *obj, u32 da); 88extern u32 iommu_kmalloc(struct iommu *obj, u32 da, size_t bytes, 89 u32 flags); 90extern void iommu_kfree(struct iommu *obj, u32 da); 91 92extern void *da_to_va(struct iommu *obj, u32 da); 93 94#endif /* __IOMMU_MMAP_H */ 95