mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 00:48:50 +00:00
3d39cecc48
We only ever obtain this lock immediately before the iova_rbtree_lock, and release it immediately after the iova_rbtree_lock. So ditch it and just use iova_rbtree_lock. [v2: Remove the lockdep bits this time too] Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/*
|
|
* 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_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
|