Contributors: 14
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Anil S Keshavamurthy |
317 |
45.94% |
2 |
8.33% |
| Robin Murphy |
148 |
21.45% |
6 |
25.00% |
| Thierry Reding |
90 |
13.04% |
1 |
4.17% |
| Jiang Liu |
36 |
5.22% |
2 |
8.33% |
| Omer Peleg |
31 |
4.49% |
1 |
4.17% |
| John Garry |
17 |
2.46% |
3 |
12.50% |
| David S. Miller |
12 |
1.74% |
1 |
4.17% |
| Michael Kelley |
8 |
1.16% |
1 |
4.17% |
| David Woodhouse |
8 |
1.16% |
1 |
4.17% |
| Joerg Roedel |
7 |
1.01% |
2 |
8.33% |
| Tomasz Nowicki |
6 |
0.87% |
1 |
4.17% |
| Ganapatrao Kulkarni |
5 |
0.72% |
1 |
4.17% |
| Sakari Ailus |
3 |
0.43% |
1 |
4.17% |
| Thomas Gleixner |
2 |
0.29% |
1 |
4.17% |
| Total |
690 |
|
24 |
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2006, Intel Corporation.
*
* 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>
/* iova structure */
struct iova {
struct rb_node node;
unsigned long pfn_hi; /* Highest allocated pfn */
unsigned long pfn_lo; /* Lowest allocated pfn */
};
struct iova_rcache;
/* 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 *cached_node; /* Save last alloced node */
struct rb_node *cached32_node; /* Save last 32-bit alloced node */
unsigned long granule; /* pfn granularity for this domain */
unsigned long start_pfn; /* Lower limit for this domain */
unsigned long dma_32bit_pfn;
unsigned long max32_alloc_size; /* Size of last failed allocation */
struct iova anchor; /* rbtree lookup anchor */
struct iova_rcache *rcaches;
struct hlist_node cpuhp_dead;
};
static inline unsigned long iova_size(struct iova *iova)
{
return iova->pfn_hi - iova->pfn_lo + 1;
}
static inline unsigned long iova_shift(struct iova_domain *iovad)
{
return __ffs(iovad->granule);
}
static inline unsigned long iova_mask(struct iova_domain *iovad)
{
return iovad->granule - 1;
}
static inline size_t iova_offset(struct iova_domain *iovad, dma_addr_t iova)
{
return iova & iova_mask(iovad);
}
static inline size_t iova_align(struct iova_domain *iovad, size_t size)
{
return ALIGN(size, iovad->granule);
}
static inline size_t iova_align_down(struct iova_domain *iovad, size_t size)
{
return ALIGN_DOWN(size, iovad->granule);
}
static inline dma_addr_t iova_dma_addr(struct iova_domain *iovad, struct iova *iova)
{
return (dma_addr_t)iova->pfn_lo << iova_shift(iovad);
}
static inline unsigned long iova_pfn(struct iova_domain *iovad, dma_addr_t iova)
{
return iova >> iova_shift(iovad);
}
#if IS_REACHABLE(CONFIG_IOMMU_IOVA)
int iova_cache_get(void);
void iova_cache_put(void);
unsigned long iova_rcache_range(void);
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);
void free_iova_fast(struct iova_domain *iovad, unsigned long pfn,
unsigned long size);
unsigned long alloc_iova_fast(struct iova_domain *iovad, unsigned long size,
unsigned long limit_pfn, bool flush_rcache);
struct iova *reserve_iova(struct iova_domain *iovad, unsigned long pfn_lo,
unsigned long pfn_hi);
void init_iova_domain(struct iova_domain *iovad, unsigned long granule,
unsigned long start_pfn);
int iova_domain_init_rcaches(struct iova_domain *iovad);
struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
void put_iova_domain(struct iova_domain *iovad);
#else
static inline int iova_cache_get(void)
{
return -ENOTSUPP;
}
static inline void iova_cache_put(void)
{
}
static inline void free_iova(struct iova_domain *iovad, unsigned long pfn)
{
}
static inline void __free_iova(struct iova_domain *iovad, struct iova *iova)
{
}
static inline struct iova *alloc_iova(struct iova_domain *iovad,
unsigned long size,
unsigned long limit_pfn,
bool size_aligned)
{
return NULL;
}
static inline void free_iova_fast(struct iova_domain *iovad,
unsigned long pfn,
unsigned long size)
{
}
static inline unsigned long alloc_iova_fast(struct iova_domain *iovad,
unsigned long size,
unsigned long limit_pfn,
bool flush_rcache)
{
return 0;
}
static inline struct iova *reserve_iova(struct iova_domain *iovad,
unsigned long pfn_lo,
unsigned long pfn_hi)
{
return NULL;
}
static inline void init_iova_domain(struct iova_domain *iovad,
unsigned long granule,
unsigned long start_pfn)
{
}
static inline struct iova *find_iova(struct iova_domain *iovad,
unsigned long pfn)
{
return NULL;
}
static inline void put_iova_domain(struct iova_domain *iovad)
{
}
#endif
#endif