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 #include <linux/iommu.h> 17 18 struct iovm_struct { 19 struct omap_iommu *iommu; /* iommu object which this belongs to */ 20 u32 da_start; /* area definition */ 21 u32 da_end; 22 u32 flags; /* IOVMF_: see below */ 23 struct list_head list; /* linked in ascending order */ 24 const struct sg_table *sgt; /* keep 'page' <-> 'da' mapping */ 25 void *va; /* mpu side mapped address */ 26 }; 27 28 /* 29 * IOVMF_FLAGS: attribute for iommu virtual memory area(iovma) 30 * 31 * lower 16 bit is used for h/w and upper 16 bit is for s/w. 32 */ 33 #define IOVMF_SW_SHIFT 16 34 35 /* 36 * iovma: h/w flags derived from cam and ram attribute 37 */ 38 #define IOVMF_CAM_MASK (~((1 << 10) - 1)) 39 #define IOVMF_RAM_MASK (~IOVMF_CAM_MASK) 40 41 #define IOVMF_PGSZ_MASK (3 << 0) 42 #define IOVMF_PGSZ_1M MMU_CAM_PGSZ_1M 43 #define IOVMF_PGSZ_64K MMU_CAM_PGSZ_64K 44 #define IOVMF_PGSZ_4K MMU_CAM_PGSZ_4K 45 #define IOVMF_PGSZ_16M MMU_CAM_PGSZ_16M 46 47 #define IOVMF_ENDIAN_MASK (1 << 9) 48 #define IOVMF_ENDIAN_BIG MMU_RAM_ENDIAN_BIG 49 #define IOVMF_ENDIAN_LITTLE MMU_RAM_ENDIAN_LITTLE 50 51 #define IOVMF_ELSZ_MASK (3 << 7) 52 #define IOVMF_ELSZ_8 MMU_RAM_ELSZ_8 53 #define IOVMF_ELSZ_16 MMU_RAM_ELSZ_16 54 #define IOVMF_ELSZ_32 MMU_RAM_ELSZ_32 55 #define IOVMF_ELSZ_NONE MMU_RAM_ELSZ_NONE 56 57 #define IOVMF_MIXED_MASK (1 << 6) 58 #define IOVMF_MIXED MMU_RAM_MIXED 59 60 /* 61 * iovma: s/w flags, used for mapping and umapping internally. 62 */ 63 #define IOVMF_MMIO (1 << IOVMF_SW_SHIFT) 64 #define IOVMF_ALLOC (2 << IOVMF_SW_SHIFT) 65 #define IOVMF_ALLOC_MASK (3 << IOVMF_SW_SHIFT) 66 67 /* "superpages" is supported just with physically linear pages */ 68 #define IOVMF_DISCONT (1 << (2 + IOVMF_SW_SHIFT)) 69 #define IOVMF_LINEAR (2 << (2 + IOVMF_SW_SHIFT)) 70 #define IOVMF_LINEAR_MASK (3 << (2 + IOVMF_SW_SHIFT)) 71 72 #define IOVMF_DA_FIXED (1 << (4 + IOVMF_SW_SHIFT)) 73 74 75 extern struct iovm_struct *omap_find_iovm_area(struct device *dev, u32 da); 76 extern u32 77 omap_iommu_vmap(struct iommu_domain *domain, struct device *dev, u32 da, 78 const struct sg_table *sgt, u32 flags); 79 extern struct sg_table *omap_iommu_vunmap(struct iommu_domain *domain, 80 struct device *dev, u32 da); 81 extern u32 82 omap_iommu_vmalloc(struct iommu_domain *domain, struct device *dev, 83 u32 da, size_t bytes, u32 flags); 84 extern void 85 omap_iommu_vfree(struct iommu_domain *domain, struct device *dev, 86 const u32 da); 87 extern void *omap_da_to_va(struct device *dev, u32 da); 88 89 #endif /* __IOMMU_MMAP_H */ 90