2 * Copyright (c) 2006, Intel Corporation.
4 * This file is released under the GPLv2.
6 * Copyright (C) 2006-2008 Intel Corporation
7 * Author: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/rbtree.h>
17 #include <linux/dma-mapping.h>
19 /* IO virtual address start page frame number */
20 #define IOVA_START_PFN (1)
25 unsigned long pfn_hi; /* IOMMU dish out addr hi */
26 unsigned long pfn_lo; /* IOMMU dish out addr lo */
27 struct list_head list;
31 /* holds all the iova translations for a domain */
33 spinlock_t iova_alloc_lock;/* Lock to protect iova allocation */
34 spinlock_t iova_rbtree_lock; /* Lock to protect update of rbtree */
35 struct rb_root rbroot; /* iova domain rbtree root */
36 struct rb_node *cached32_node; /* Save last alloced node */
37 unsigned long dma_32bit_pfn;
40 struct iova *alloc_iova_mem(void);
41 void free_iova_mem(struct iova *iova);
42 void free_iova(struct iova_domain *iovad, unsigned long pfn);
43 void __free_iova(struct iova_domain *iovad, struct iova *iova);
44 struct iova *alloc_iova(struct iova_domain *iovad, unsigned long size,
45 unsigned long limit_pfn,
47 struct iova *reserve_iova(struct iova_domain *iovad, unsigned long pfn_lo,
48 unsigned long pfn_hi);
49 void copy_reserved_iova(struct iova_domain *from, struct iova_domain *to);
50 void init_iova_domain(struct iova_domain *iovad, unsigned long pfn_32bit);
51 struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
52 void put_iova_domain(struct iova_domain *iovad);