/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013-2017 Mellanox Technologies, Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _LINUX_SLAB_H_
#define _LINUX_SLAB_H_
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <vm/uma.h>
#include <linux/types.h>
#include <linux/gfp.h>
MALLOC_DECLARE(M_KMALLOC);
#define kvmalloc(size) kmalloc(size, 0)
#define kzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO)
#define kzalloc_node(size, flags, node) kmalloc(size, (flags) | __GFP_ZERO)
#define kfree_const(ptr) kfree(ptr)
#define kcalloc(n, size, flags) kmalloc((n) * (size), (flags) | __GFP_ZERO)
#define vzalloc(size) __vmalloc(size, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO, 0)
#define vfree(arg) kfree(arg)
#define kvfree(arg) kfree(arg)
#define vmalloc_node(size, node) __vmalloc(size, GFP_KERNEL, 0)
#define vmalloc_user(size) __vmalloc(size, GFP_KERNEL | __GFP_ZERO, 0)
#define vmalloc(size) __vmalloc(size, GFP_KERNEL, 0)
#define __kmalloc(...) kmalloc(__VA_ARGS__)
#define kmalloc_node(chunk, flags, n) kmalloc(chunk, flags)
/*
* Prefix some functions with linux_ to avoid namespace conflict
* with the OpenSolaris code in the kernel.
*/
#define kmem_cache linux_kmem_cache
#define kmem_cache_create(...) linux_kmem_cache_create(__VA_ARGS__)
#define kmem_cache_alloc(...) linux_kmem_cache_alloc(__VA_ARGS__)
#define kmem_cache_free(...) linux_kmem_cache_free(__VA_ARGS__)
#define kmem_cache_destroy(...) linux_kmem_cache_destroy(__VA_ARGS__)
typedef void linux_kmem_ctor_t (void *);
struct linux_kmem_cache {
uma_zone_t cache_zone;
linux_kmem_ctor_t *cache_ctor;
unsigned cache_flags;
unsigned cache_size;
};
#define SLAB_HWCACHE_ALIGN (1 << 0)
#define SLAB_DESTROY_BY_RCU (1 << 1)
#define SLAB_RECLAIM_ACCOUNT (1 << 2)
static inline gfp_t
linux_check_m_flags(gfp_t flags)
{
const gfp_t m = M_NOWAIT | M_WAITOK;
/* make sure either M_NOWAIT or M_WAITOK is set */
if ((flags & m) == 0)
flags |= M_NOWAIT;
else if ((flags & m) == m)
flags &= ~M_WAITOK;
/* mask away LinuxKPI specific flags */
return (flags & GFP_NATIVE_MASK);
}
static inline void *
kmalloc(size_t size, gfp_t flags)
{
return (malloc(size, M_KMALLOC, linux_check_m_flags(flags)));
}
static inline void *
__vmalloc(size_t size, gfp_t flags, int other)
{
return (malloc(size, M_KMALLOC, linux_check_m_flags(flags)));
}
static inline void *
kmalloc_array(size_t n, size_t size, gfp_t flags)
{
if (size != 0 && n > (SIZE_MAX / size))
return (NULL);
return (malloc(n * size, M_KMALLOC, linux_check_m_flags(flags)));
}
static inline void *
krealloc(void *ptr, size_t size, gfp_t flags)
{
return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags)));
}
static inline void
kfree(const void *ptr)
{
free(__DECONST(void *, ptr), M_KMALLOC);
}
extern struct linux_kmem_cache *linux_kmem_cache_create(const char *name,
size_t size, size_t align, unsigned flags, linux_kmem_ctor_t *ctor);
static inline void *
linux_kmem_cache_alloc(struct linux_kmem_cache *c, gfp_t flags)
{
return (uma_zalloc_arg(c->cache_zone, c,
linux_check_m_flags(flags)));
}
static inline void *
kmem_cache_zalloc(struct linux_kmem_cache *c, gfp_t flags)
{
return (uma_zalloc_arg(c->cache_zone, c,
linux_check_m_flags(flags | M_ZERO)));
}
extern void linux_kmem_cache_free_rcu(struct linux_kmem_cache *, void *);
static inline void
linux_kmem_cache_free(struct linux_kmem_cache *c, void *m)
{
if (unlikely(c->cache_flags & SLAB_DESTROY_BY_RCU))
linux_kmem_cache_free_rcu(c, m);
else
uma_zfree(c->cache_zone, m);
}
extern void linux_kmem_cache_destroy(struct linux_kmem_cache *);
#endif /* _LINUX_SLAB_H_ */
