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/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013-2015 Mellanox Technologies, Ltd.
* Copyright (c) 2015 François Tigeot
* Copyright (c) 2015 Matthew Dillon <dillon@backplane.com>
* 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_MM_H_
#define _LINUX_MM_H_
#include <linux/spinlock.h>
#include <linux/gfp.h>
#include <linux/kernel.h>
#define PAGE_ALIGN(x) ALIGN(x, PAGE_SIZE)
struct vm_area_struct {
vm_offset_t vm_start;
vm_offset_t vm_end;
vm_offset_t vm_pgoff;
vm_paddr_t vm_pfn; /* PFN For mmap. */
vm_size_t vm_len; /* length for mmap. */
vm_memattr_t vm_page_prot;
};
/*
* Compute log2 of the power of two rounded up count of pages
* needed for size bytes.
*/
static inline int
get_order(unsigned long size)
{
int order;
size = (size - 1) >> PAGE_SHIFT;
order = 0;
while (size) {
order++;
size >>= 1;
}
return (order);
}
static inline void *
lowmem_page_address(struct page *page)
{
return page_address(page);
}
/*
* This only works via mmap ops.
*/
static inline int
io_remap_pfn_range(struct vm_area_struct *vma,
unsigned long addr, unsigned long pfn, unsigned long size,
vm_memattr_t prot)
{
vma->vm_page_prot = prot;
vma->vm_pfn = pfn;
vma->vm_len = size;
return (0);
}
static inline unsigned long
vma_pages(struct vm_area_struct *vma)
{
return ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT);
}
#define offset_in_page(off) ((off) & (PAGE_SIZE - 1))
static inline void
set_page_dirty(struct vm_page *page)
{
vm_page_dirty(page);
}
static inline void
get_page(struct vm_page *page)
{
vm_page_hold(page);
}
#endif /* _LINUX_MM_H_ */
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