Release 4.12 include/linux/iova.h

Directory: include/linux
/*
 * 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>

/* iova structure */

struct iova {
	
struct rb_node	node;
	
unsigned long	pfn_hi; /* Highest allocated pfn */
	
unsigned long	pfn_lo; /* Lowest allocated pfn */
};

struct iova_magazine;
struct iova_cpu_rcache;


#define IOVA_RANGE_CACHE_MAX_SIZE 6	
/* log of max cached IOVA range size (in pages) */

#define MAX_GLOBAL_MAGS 32	
/* magazines per bin */


struct iova_rcache {
	
spinlock_t lock;
	
unsigned long depot_size;
	
struct iova_magazine *depot[MAX_GLOBAL_MAGS];
	
struct iova_cpu_rcache __percpu *cpu_rcaches;
};

/* 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	granule;	/* pfn granularity for this domain */
	
unsigned long	start_pfn;	/* Lower limit for this domain */
	
unsigned long	dma_32bit_pfn;
	
struct iova_rcache rcaches[IOVA_RANGE_CACHE_MAX_SIZE];	/* IOVA range caches */
};



static inline unsigned long iova_size(struct iova *iova)
{
	return iova->pfn_hi - iova->pfn_lo + 1;
}

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Jiang Liu 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static inline unsigned long iova_shift(struct iova_domain *iovad)
{
	return __ffs(iovad->granule);
}

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Robin Murphy 21 100.00% 1 100.00%
Total 21 100.00% 1 100.00%



static inline unsigned long iova_mask(struct iova_domain *iovad)
{
	return iovad->granule - 1;
}

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Robin Murphy 20 100.00% 1 100.00%
Total 20 100.00% 1 100.00%



static inline size_t iova_offset(struct iova_domain *iovad, dma_addr_t iova)
{
	return iova & iova_mask(iovad);
}

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Robin Murphy 23 100.00% 1 100.00%
Total 23 100.00% 1 100.00%



static inline size_t iova_align(struct iova_domain *iovad, size_t size)
{
	return ALIGN(size, iovad->granule);
}

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Robin Murphy 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%



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);
}

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Robin Murphy 30 100.00% 1 100.00%
Total 30 100.00% 1 100.00%



static inline unsigned long iova_pfn(struct iova_domain *iovad, dma_addr_t iova)
{
	return iova >> iova_shift(iovad);
}

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Robin Murphy 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%

#if IS_ENABLED(CONFIG_IOMMU_IOVA)
int iova_cache_get(void);
void iova_cache_put(void);

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);
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);
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 granule,
	unsigned long start_pfn, unsigned long pfn_32bit);
struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
void put_iova_domain(struct iova_domain *iovad);
struct iova *split_and_remove_iova(struct iova_domain *iovad,
	struct iova *iova, unsigned long pfn_lo, unsigned long pfn_hi);
void free_cpu_cached_iovas(unsigned int cpu, struct iova_domain *iovad);
#else


static inline int iova_cache_get(void)
{
	return -ENOTSUPP;
}

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Thierry Reding 13 100.00% 1 100.00%
Total 13 100.00% 1 100.00%



static inline void iova_cache_put(void)
{
}

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Thierry Reding 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%



static inline struct iova *alloc_iova_mem(void)
{
	return NULL;
}

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Thierry Reding 14 100.00% 1 100.00%
Total 14 100.00% 1 100.00%



static inline void free_iova_mem(struct iova *iova)
{
}

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Thierry Reding 11 100.00% 1 100.00%
Total 11 100.00% 1 100.00%



static inline void free_iova(struct iova_domain *iovad, unsigned long pfn)
{
}

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Thierry Reding 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%



static inline void __free_iova(struct iova_domain *iovad, struct iova *iova)
{
}

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Thierry Reding 16 100.00% 1 100.00%
Total 16 100.00% 1 100.00%



static inline struct iova *alloc_iova(struct iova_domain *iovad,
				      unsigned long size,
				      unsigned long limit_pfn,
				      bool size_aligned)
{
	return NULL;
}

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Thierry Reding 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%



static inline void free_iova_fast(struct iova_domain *iovad,
				  unsigned long pfn,
				  unsigned long size)
{
}

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Thierry Reding 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%



static inline unsigned long alloc_iova_fast(struct iova_domain *iovad,
					    unsigned long size,
					    unsigned long limit_pfn)
{
	return 0;
}

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Thierry Reding 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static inline struct iova *reserve_iova(struct iova_domain *iovad,
					unsigned long pfn_lo,
					unsigned long pfn_hi)
{
	return NULL;
}

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Thierry Reding 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%



static inline void copy_reserved_iova(struct iova_domain *from,
				      struct iova_domain *to)
{
}

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Thierry Reding 16 100.00% 1 100.00%
Total 16 100.00% 1 100.00%



static inline void init_iova_domain(struct iova_domain *iovad,
				    unsigned long granule,
				    unsigned long start_pfn,
				    unsigned long pfn_32bit)
{
}

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Thierry Reding 23 100.00% 1 100.00%
Total 23 100.00% 1 100.00%



static inline struct iova *find_iova(struct iova_domain *iovad,
				     unsigned long pfn)
{
	return NULL;
}

Contributors
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Thierry Reding 21 100.00% 1 100.00%
Total 21 100.00% 1 100.00%



static inline void put_iova_domain(struct iova_domain *iovad)
{
}

Contributors
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Thierry Reding 11 100.00% 1 100.00%
Total 11 100.00% 1 100.00%



static inline struct iova *split_and_remove_iova(struct iova_domain *iovad,
						 struct iova *iova,
						 unsigned long pfn_lo,
						 unsigned long pfn_hi)
{
	return NULL;
}

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Thierry Reding 30 100.00% 1 100.00%
Total 30 100.00% 1 100.00%



static inline void free_cpu_cached_iovas(unsigned int cpu,
					 struct iova_domain *iovad)
{
}
Contributors
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Thierry Reding 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%

#endif

#endif
Overall Contributors
Person Tokens Prop Commits CommitProp
Thierry Reding 294 35.85% 1 7.69%
Anil S Keshavamurthy 191 23.29% 2 15.38%
Robin Murphy 171 20.85% 3 23.08%
Omer Peleg 100 12.20% 1 7.69%
Jiang Liu 48 5.85% 2 15.38%
David S. Miller 8 0.98% 1 7.69%
Joerg Roedel 5 0.61% 1 7.69%
Sakari Ailus 2 0.24% 1 7.69%
Mark Gross 1 0.12% 1 7.69%
Total 820 100.00% 13 100.00%
Directory: include/linux

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Person	Tokens	Prop	Commits	CommitProp
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Total	24	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.12 include/linux/iova.h

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