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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f661197e0a
I would like to potentially move the sparc64 IOMMU code over to using the nice new drivers/pci/iova.[ch] code for free area management.. In order to do that we have to detach the IOMMU page size assumptions which only really need to exist in the intel-iommu.[ch] code. This patch attempts to implement that. [akpm@linux-foundation.org: build fix] Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/*
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* Copyright (c) 2006, Intel Corporation.
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*
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* This file is released under the GPLv2.
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*
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* Copyright (C) 2006 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
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*
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*/
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#ifndef _IOVA_H_
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#define _IOVA_H_
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/rbtree.h>
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#include <linux/dma-mapping.h>
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/* IO virtual address start page frame number */
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#define IOVA_START_PFN (1)
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/* iova structure */
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struct iova {
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struct rb_node node;
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unsigned long pfn_hi; /* IOMMU dish out addr hi */
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unsigned long pfn_lo; /* IOMMU dish out addr lo */
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};
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/* holds all the iova translations for a domain */
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struct iova_domain {
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spinlock_t iova_alloc_lock;/* Lock to protect iova allocation */
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spinlock_t iova_rbtree_lock; /* Lock to protect update of rbtree */
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struct rb_root rbroot; /* iova domain rbtree root */
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struct rb_node *cached32_node; /* Save last alloced node */
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unsigned long dma_32bit_pfn;
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};
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struct iova *alloc_iova_mem(void);
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void free_iova_mem(struct iova *iova);
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void free_iova(struct iova_domain *iovad, unsigned long pfn);
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void __free_iova(struct iova_domain *iovad, struct iova *iova);
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struct iova *alloc_iova(struct iova_domain *iovad, unsigned long size,
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unsigned long limit_pfn,
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bool size_aligned);
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struct iova *reserve_iova(struct iova_domain *iovad, unsigned long pfn_lo,
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unsigned long pfn_hi);
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void copy_reserved_iova(struct iova_domain *from, struct iova_domain *to);
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void init_iova_domain(struct iova_domain *iovad, unsigned long pfn_32bit);
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struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
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void put_iova_domain(struct iova_domain *iovad);
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#endif
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