mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![John Garry](/assets/img/avatar_default.png)
Since commit c588072bba
("iommu/vt-d: Convert intel iommu driver to the
iommu ops"), function copy_reserved_iova() is not referenced, so delete
it.
Signed-off-by: John Garry <john.garry@huawei.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/1609940111-28563-3-git-send-email-john.garry@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
242 lines
6.3 KiB
C
242 lines
6.3 KiB
C
/* 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/atomic.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;
|
|
};
|
|
|
|
struct iova_domain;
|
|
|
|
/* Call-Back from IOVA code into IOMMU drivers */
|
|
typedef void (* iova_flush_cb)(struct iova_domain *domain);
|
|
|
|
/* Destructor for per-entry data */
|
|
typedef void (* iova_entry_dtor)(unsigned long data);
|
|
|
|
/* Number of entries per Flush Queue */
|
|
#define IOVA_FQ_SIZE 256
|
|
|
|
/* Timeout (in ms) after which entries are flushed from the Flush-Queue */
|
|
#define IOVA_FQ_TIMEOUT 10
|
|
|
|
/* Flush Queue entry for defered flushing */
|
|
struct iova_fq_entry {
|
|
unsigned long iova_pfn;
|
|
unsigned long pages;
|
|
unsigned long data;
|
|
u64 counter; /* Flush counter when this entrie was added */
|
|
};
|
|
|
|
/* Per-CPU Flush Queue structure */
|
|
struct iova_fq {
|
|
struct iova_fq_entry entries[IOVA_FQ_SIZE];
|
|
unsigned head, tail;
|
|
spinlock_t lock;
|
|
};
|
|
|
|
/* 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_fq __percpu *fq; /* Flush Queue */
|
|
|
|
atomic64_t fq_flush_start_cnt; /* Number of TLB flushes that
|
|
have been started */
|
|
|
|
atomic64_t fq_flush_finish_cnt; /* Number of TLB flushes that
|
|
have been finished */
|
|
|
|
struct iova anchor; /* rbtree lookup anchor */
|
|
struct iova_rcache rcaches[IOVA_RANGE_CACHE_MAX_SIZE]; /* IOVA range caches */
|
|
|
|
iova_flush_cb flush_cb; /* Call-Back function to flush IOMMU
|
|
TLBs */
|
|
|
|
iova_entry_dtor entry_dtor; /* IOMMU driver specific destructor for
|
|
iova entry */
|
|
|
|
struct timer_list fq_timer; /* Timer to regularily empty the
|
|
flush-queues */
|
|
atomic_t fq_timer_on; /* 1 when timer is active, 0
|
|
when not */
|
|
};
|
|
|
|
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 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_ENABLED(CONFIG_IOMMU_IOVA)
|
|
int iova_cache_get(void);
|
|
void iova_cache_put(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);
|
|
void queue_iova(struct iova_domain *iovad,
|
|
unsigned long pfn, unsigned long pages,
|
|
unsigned long data);
|
|
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 init_iova_flush_queue(struct iova_domain *iovad,
|
|
iova_flush_cb flush_cb, iova_entry_dtor entry_dtor);
|
|
struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
|
|
void put_iova_domain(struct iova_domain *iovad);
|
|
void free_cpu_cached_iovas(unsigned int cpu, 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 void queue_iova(struct iova_domain *iovad,
|
|
unsigned long pfn, unsigned long pages,
|
|
unsigned long data)
|
|
{
|
|
}
|
|
|
|
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 int init_iova_flush_queue(struct iova_domain *iovad,
|
|
iova_flush_cb flush_cb,
|
|
iova_entry_dtor entry_dtor)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
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)
|
|
{
|
|
}
|
|
|
|
static inline void free_cpu_cached_iovas(unsigned int cpu,
|
|
struct iova_domain *iovad)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif
|