/*
* omap iommu: simple virtual address space management
*
* Copyright (C) 2008-2009 Nokia Corporation
*
* Written by Hiroshi DOYU <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/

#ifndef _INTEL_IOMMU_H_
#define _INTEL_IOMMU_H_

struct iovm_struct {
struct omap_iommu *iommu; /* iommu object which this belongs to */
u32 da_start; /* area definition */
u32 da_end;
u32 flags; /* IOVMF_: see below */
struct list_head list; /* linked in ascending order */
const struct sg_table *sgt; /* keep 'page' <-> 'da' mapping */
void *va; /* mpu side mapped address */
};

#define MMU_RAM_ENDIAN_SHIFT 9
#define MMU_RAM_ENDIAN_LITTLE (0 << MMU_RAM_ENDIAN_SHIFT)
#define MMU_RAM_ELSZ_8 (0 << MMU_RAM_ELSZ_SHIFT)
#define IOVMF_ENDIAN_LITTLE MMU_RAM_ENDIAN_LITTLE
#define MMU_RAM_ELSZ_SHIFT 7
#define IOVMF_ELSZ_8 MMU_RAM_ELSZ_8

struct iommu_domain;

extern struct iovm_struct *omap_find_iovm_area(struct device *dev, u32 da);
extern u32
omap_iommu_vmap(struct iommu_domain *domain, struct device *dev, u32 da,
const struct sg_table *sgt, u32 flags);
extern struct sg_table *omap_iommu_vunmap(struct iommu_domain *domain,
struct device *dev, u32 da);
extern u32
omap_iommu_vmalloc(struct iommu_domain *domain, struct device *dev,
u32 da, size_t bytes, u32 flags);
extern void
omap_iommu_vfree(struct iommu_domain *domain, struct device *dev,
const u32 da);
extern void *omap_da_to_va(struct device *dev, u32 da);

extern void omap_iommu_save_ctx(struct device *dev);
extern void omap_iommu_restore_ctx(struct device *dev);

#endif