d038aee24d
Currently IOVMM driver sets IOVMF_DA_FIXED/IOVMF_DA_ANON flags according to input 'da' address when mapping memory: da == 0: IOVMF_DA_ANON da != 0: IOVMF_DA_FIXED It prevents IOMMU to map first page with fixed 'da'. To avoid such issue, IOVMM will not automatically set IOVMF_DA_FIXED. It should now come from the user throught 'flags' parameter when mapping memory. As IOVMF_DA_ANON and IOVMF_DA_FIXED are mutually exclusive, IOVMF_DA_ANON can be removed. The driver will now check internally if IOVMF_DA_FIXED is set or not. Signed-off-by: David Cohen <dacohen@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
92 lines
2.9 KiB
C
92 lines
2.9 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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struct iovm_struct {
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struct 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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#define IOVMF_HW_SIZE (1 << IOVMF_SW_SHIFT)
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#define IOVMF_HW_MASK (IOVMF_HW_SIZE - 1)
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#define IOVMF_SW_MASK (~IOVMF_HW_MASK)UL
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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 *find_iovm_area(struct iommu *obj, u32 da);
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extern u32 iommu_vmap(struct iommu *obj, u32 da,
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const struct sg_table *sgt, u32 flags);
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extern struct sg_table *iommu_vunmap(struct iommu *obj, u32 da);
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extern u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes,
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u32 flags);
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extern void iommu_vfree(struct iommu *obj, const u32 da);
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extern u32 iommu_kmap(struct iommu *obj, u32 da, u32 pa, size_t bytes,
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u32 flags);
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extern void iommu_kunmap(struct iommu *obj, u32 da);
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extern u32 iommu_kmalloc(struct iommu *obj, u32 da, size_t bytes,
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u32 flags);
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extern void iommu_kfree(struct iommu *obj, u32 da);
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extern void *da_to_va(struct iommu *obj, u32 da);
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#endif /* __IOMMU_MMAP_H */
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