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authorKay, Allen M <allen.m.kay@intel.com>2008-09-09 11:37:29 -0400
committerAvi Kivity <avi@redhat.com>2008-10-15 08:24:08 -0400
commit387179464257921eb9aa3d15cc3ff194f6945a7c (patch)
treea7f06903688df8a1d3231faf1ab68bf80e032ea6 /include/linux/iova.h
parentaa3a816b6d0bd59e1a9c548cc7d2dd829f26534f (diff)
VT-d: Changes to support KVM
This patch extends the VT-d driver to support KVM [Ben: fixed memory pinning] [avi: move dma_remapping.h as well] Signed-off-by: Kay, Allen M <allen.m.kay@intel.com> Signed-off-by: Weidong Han <weidong.han@intel.com> Signed-off-by: Ben-Ami Yassour <benami@il.ibm.com> Signed-off-by: Amit Shah <amit.shah@qumranet.com> Acked-by: Mark Gross <mgross@linux.intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include/linux/iova.h')
-rw-r--r--include/linux/iova.h52
1 files changed, 52 insertions, 0 deletions
diff --git a/include/linux/iova.h b/include/linux/iova.h
new file mode 100644
index 000000000000..228f6c94b69c
--- /dev/null
+++ b/include/linux/iova.h
@@ -0,0 +1,52 @@
1/*
2 * Copyright (c) 2006, Intel Corporation.
3 *
4 * This file is released under the GPLv2.
5 *
6 * Copyright (C) 2006-2008 Intel Corporation
7 * Author: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
8 *
9 */
10
11#ifndef _IOVA_H_
12#define _IOVA_H_
13
14#include <linux/types.h>
15#include <linux/kernel.h>
16#include <linux/rbtree.h>
17#include <linux/dma-mapping.h>
18
19/* IO virtual address start page frame number */
20#define IOVA_START_PFN (1)
21
22/* iova structure */
23struct iova {
24 struct rb_node node;
25 unsigned long pfn_hi; /* IOMMU dish out addr hi */
26 unsigned long pfn_lo; /* IOMMU dish out addr lo */
27};
28
29/* holds all the iova translations for a domain */
30struct iova_domain {
31 spinlock_t iova_alloc_lock;/* Lock to protect iova allocation */
32 spinlock_t iova_rbtree_lock; /* Lock to protect update of rbtree */
33 struct rb_root rbroot; /* iova domain rbtree root */
34 struct rb_node *cached32_node; /* Save last alloced node */
35 unsigned long dma_32bit_pfn;
36};
37
38struct iova *alloc_iova_mem(void);
39void free_iova_mem(struct iova *iova);
40void free_iova(struct iova_domain *iovad, unsigned long pfn);
41void __free_iova(struct iova_domain *iovad, struct iova *iova);
42struct iova *alloc_iova(struct iova_domain *iovad, unsigned long size,
43 unsigned long limit_pfn,
44 bool size_aligned);
45struct iova *reserve_iova(struct iova_domain *iovad, unsigned long pfn_lo,
46 unsigned long pfn_hi);
47void copy_reserved_iova(struct iova_domain *from, struct iova_domain *to);
48void init_iova_domain(struct iova_domain *iovad, unsigned long pfn_32bit);
49struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
50void put_iova_domain(struct iova_domain *iovad);
51
52#endif