forked from Minki/linux
fabdbca8c9
Eliminate the public omap_find_iommu_device() method, and don't expect clients to provide the omap_iommu handle anymore. Instead, OMAP's iommu driver now utilizes dev_archdata's private iommu extension to be able to access the required iommu information. This way OMAP IOMMU users are now able to use the generic IOMMU API without having to call any omap-specific binding method. Update omap3isp appropriately. Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Tony Lindgren <tony@atomide.com> Cc: Hiroshi Doyu <hdoyu@nvidia.com>
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/*
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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 __IOMMU_MMAP_H
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#define __IOMMU_MMAP_H
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#include <linux/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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/*
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* IOVMF_FLAGS: attribute for iommu virtual memory area(iovma)
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*
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* lower 16 bit is used for h/w and upper 16 bit is for s/w.
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*/
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#define IOVMF_SW_SHIFT 16
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/*
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* iovma: h/w flags derived from cam and ram attribute
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*/
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#define IOVMF_CAM_MASK (~((1 << 10) - 1))
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#define IOVMF_RAM_MASK (~IOVMF_CAM_MASK)
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#define IOVMF_PGSZ_MASK (3 << 0)
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#define IOVMF_PGSZ_1M MMU_CAM_PGSZ_1M
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#define IOVMF_PGSZ_64K MMU_CAM_PGSZ_64K
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#define IOVMF_PGSZ_4K MMU_CAM_PGSZ_4K
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#define IOVMF_PGSZ_16M MMU_CAM_PGSZ_16M
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#define IOVMF_ENDIAN_MASK (1 << 9)
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#define IOVMF_ENDIAN_BIG MMU_RAM_ENDIAN_BIG
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#define IOVMF_ENDIAN_LITTLE MMU_RAM_ENDIAN_LITTLE
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#define IOVMF_ELSZ_MASK (3 << 7)
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#define IOVMF_ELSZ_8 MMU_RAM_ELSZ_8
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#define IOVMF_ELSZ_16 MMU_RAM_ELSZ_16
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#define IOVMF_ELSZ_32 MMU_RAM_ELSZ_32
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#define IOVMF_ELSZ_NONE MMU_RAM_ELSZ_NONE
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#define IOVMF_MIXED_MASK (1 << 6)
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#define IOVMF_MIXED MMU_RAM_MIXED
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/*
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* iovma: s/w flags, used for mapping and umapping internally.
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*/
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#define IOVMF_MMIO (1 << IOVMF_SW_SHIFT)
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#define IOVMF_ALLOC (2 << IOVMF_SW_SHIFT)
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#define IOVMF_ALLOC_MASK (3 << IOVMF_SW_SHIFT)
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/* "superpages" is supported just with physically linear pages */
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#define IOVMF_DISCONT (1 << (2 + IOVMF_SW_SHIFT))
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#define IOVMF_LINEAR (2 << (2 + IOVMF_SW_SHIFT))
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#define IOVMF_LINEAR_MASK (3 << (2 + IOVMF_SW_SHIFT))
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#define IOVMF_DA_FIXED (1 << (4 + IOVMF_SW_SHIFT))
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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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#endif /* __IOMMU_MMAP_H */
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