53 строки
1.7 KiB
C
53 строки
1.7 KiB
C
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/*
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* omap iommu: simple virtual address space management
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*
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* Copyright (C) 2008-2009 Nokia Corporation
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*
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* Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _INTEL_IOMMU_H_
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#define _INTEL_IOMMU_H_
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struct iovm_struct {
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struct omap_iommu *iommu; /* iommu object which this belongs to */
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u32 da_start; /* area definition */
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u32 da_end;
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u32 flags; /* IOVMF_: see below */
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struct list_head list; /* linked in ascending order */
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const struct sg_table *sgt; /* keep 'page' <-> 'da' mapping */
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void *va; /* mpu side mapped address */
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};
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#define MMU_RAM_ENDIAN_SHIFT 9
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#define MMU_RAM_ENDIAN_LITTLE (0 << MMU_RAM_ENDIAN_SHIFT)
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#define MMU_RAM_ELSZ_8 (0 << MMU_RAM_ELSZ_SHIFT)
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#define IOVMF_ENDIAN_LITTLE MMU_RAM_ENDIAN_LITTLE
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#define MMU_RAM_ELSZ_SHIFT 7
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#define IOVMF_ELSZ_8 MMU_RAM_ELSZ_8
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struct iommu_domain;
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extern struct iovm_struct *omap_find_iovm_area(struct device *dev, u32 da);
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extern u32
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omap_iommu_vmap(struct iommu_domain *domain, struct device *dev, u32 da,
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const struct sg_table *sgt, u32 flags);
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extern struct sg_table *omap_iommu_vunmap(struct iommu_domain *domain,
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struct device *dev, u32 da);
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extern u32
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omap_iommu_vmalloc(struct iommu_domain *domain, struct device *dev,
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u32 da, size_t bytes, u32 flags);
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extern void
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omap_iommu_vfree(struct iommu_domain *domain, struct device *dev,
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const u32 da);
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extern void *omap_da_to_va(struct device *dev, u32 da);
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extern void omap_iommu_save_ctx(struct device *dev);
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extern void omap_iommu_restore_ctx(struct device *dev);
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#endif
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