tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 _INTEL_IOMMU_H_
14#define _INTEL_IOMMU_H_
15
16struct iovm_struct {
17 struct omap_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#define MMU_RAM_ENDIAN_SHIFT 9
27#define MMU_RAM_ENDIAN_LITTLE (0 << MMU_RAM_ENDIAN_SHIFT)
28#define MMU_RAM_ELSZ_8 (0 << MMU_RAM_ELSZ_SHIFT)
29#define IOVMF_ENDIAN_LITTLE MMU_RAM_ENDIAN_LITTLE
30#define MMU_RAM_ELSZ_SHIFT 7
31#define IOVMF_ELSZ_8 MMU_RAM_ELSZ_8
32
33struct iommu_domain;
34
35extern struct iovm_struct *omap_find_iovm_area(struct device *dev, u32 da);
36extern u32
37omap_iommu_vmap(struct iommu_domain *domain, struct device *dev, u32 da,
38 const struct sg_table *sgt, u32 flags);
39extern struct sg_table *omap_iommu_vunmap(struct iommu_domain *domain,
40 struct device *dev, u32 da);
41extern u32
42omap_iommu_vmalloc(struct iommu_domain *domain, struct device *dev,
43 u32 da, size_t bytes, u32 flags);
44extern void
45omap_iommu_vfree(struct iommu_domain *domain, struct device *dev,
46 const u32 da);
47extern void *omap_da_to_va(struct device *dev, u32 da);
48
49extern void omap_iommu_save_ctx(struct device *dev);
50extern void omap_iommu_restore_ctx(struct device *dev);
51
52#endif