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/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* 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.
*/
#ifndef _LINUX_GFP_H_
#define _LINUX_GFP_H_
#include <sys/systm.h>
#include <sys/malloc.h>
#include <linux/page.h>
#include <vm/vm_param.h>
#include <vm/vm_object.h>
#include <vm/vm_extern.h>
#include <vm/vm_kern.h>
#define __GFP_NOWARN 0
#define __GFP_HIGHMEM 0
#define __GFP_ZERO M_ZERO
#define GFP_NOWAIT M_NOWAIT
#define GFP_ATOMIC (M_NOWAIT | M_USE_RESERVE)
#define GFP_KERNEL M_WAITOK
#define GFP_USER M_WAITOK
#define GFP_HIGHUSER M_WAITOK
#define GFP_HIGHUSER_MOVABLE M_WAITOK
#define GFP_IOFS M_NOWAIT
static inline void *
page_address(struct page *page)
{
if (page->object != kmem_object && page->object != kernel_object)
return (NULL);
return ((void *)(uintptr_t)(VM_MIN_KERNEL_ADDRESS +
IDX_TO_OFF(page->pindex)));
}
static inline unsigned long
_get_page(gfp_t mask)
{
return kmem_malloc(kmem_map, PAGE_SIZE, mask);
}
#define get_zeroed_page(mask) _get_page((mask) | M_ZERO)
#define alloc_page(mask) virt_to_page(_get_page((mask)))
#define __get_free_page(mask) _get_page((mask))
static inline void
free_page(unsigned long page)
{
if (page == 0)
return;
kmem_free(kmem_map, page, PAGE_SIZE);
}
static inline void
__free_page(struct page *m)
{
if (m->object != kmem_object)
panic("__free_page: Freed page %p not allocated via wrappers.",
m);
kmem_free(kmem_map, (vm_offset_t)page_address(m), PAGE_SIZE);
}
static inline void
__free_pages(void *p, unsigned int order)
{
size_t size;
if (p == 0)
return;
size = PAGE_SIZE << order;
kmem_free(kmem_map, (vm_offset_t)p, size);
}
/*
* Alloc pages allocates directly from the buddy allocator on linux so
* order specifies a power of two bucket of pages and the results
* are expected to be aligned on the size as well.
*/
static inline struct page *
alloc_pages(gfp_t gfp_mask, unsigned int order)
{
unsigned long page;
size_t size;
size = PAGE_SIZE << order;
page = kmem_alloc_contig(kmem_map, size, gfp_mask, 0, -1,
size, 0, VM_MEMATTR_DEFAULT);
if (page == 0)
return (NULL);
return (virt_to_page(page));
}
#endif /* _LINUX_GFP_H_ */
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