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- /*
- * Copyright (c) 2006, Intel Corporation.
- *
- * This file is released under the GPLv2.
- *
- * Copyright (C) 2006-2008 Intel Corporation
- * Author: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
- *
- */
- #ifndef _IOVA_H_
- #define _IOVA_H_
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/rbtree.h>
- #include <linux/dma-mapping.h>
- /* IO virtual address start page frame number */
- #define IOVA_START_PFN (1)
- /* iova structure */
- struct iova {
- struct rb_node node;
- unsigned long pfn_hi; /* IOMMU dish out addr hi */
- unsigned long pfn_lo; /* IOMMU dish out addr lo */
- };
- /* holds all the iova translations for a domain */
- struct iova_domain {
- spinlock_t iova_alloc_lock;/* Lock to protect iova allocation */
- spinlock_t iova_rbtree_lock; /* Lock to protect update of rbtree */
- struct rb_root rbroot; /* iova domain rbtree root */
- struct rb_node *cached32_node; /* Save last alloced node */
- unsigned long dma_32bit_pfn;
- };
- struct iova *alloc_iova_mem(void);
- void free_iova_mem(struct iova *iova);
- void free_iova(struct iova_domain *iovad, unsigned long pfn);
- void __free_iova(struct iova_domain *iovad, struct iova *iova);
- struct iova *alloc_iova(struct iova_domain *iovad, unsigned long size,
- unsigned long limit_pfn,
- bool size_aligned);
- struct iova *reserve_iova(struct iova_domain *iovad, unsigned long pfn_lo,
- unsigned long pfn_hi);
- void copy_reserved_iova(struct iova_domain *from, struct iova_domain *to);
- void init_iova_domain(struct iova_domain *iovad, unsigned long pfn_32bit);
- struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
- void put_iova_domain(struct iova_domain *iovad);
- #endif
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