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sys/compat/linuxkpi/3.15/include/linux/gfp.h
- This file was added.
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svn:eol-style | null | native \ No newline at end of property |
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svn:mime-type | null | text/plain \ No newline at end of property |
/*- | |||||
* Copyright (c) 2010 Isilon Systems, Inc. | |||||
* Copyright (c) 2010 iX Systems, Inc. | |||||
* Copyright (c) 2010 Panasas, Inc. | |||||
* Copyright (c) 2013 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. | |||||
*/ | |||||
#ifndef _LINUX_GFP_H_ | |||||
#define _LINUX_GFP_H_ | |||||
#include <sys/cdefs.h> | |||||
#include <sys/types.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_arena, 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_arena, 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_arena, (vm_offset_t)page_address(m), PAGE_SIZE); | |||||
} | |||||
static inline void | |||||
__free_pages(struct page *m, unsigned int order) | |||||
{ | |||||
size_t size; | |||||
if (m == NULL) | |||||
return; | |||||
size = PAGE_SIZE << order; | |||||
kmem_free(kmem_arena, (vm_offset_t)page_address(m), size); | |||||
} | |||||
static inline void free_pages(uintptr_t addr, unsigned int order) | |||||
{ | |||||
if (addr == 0) | |||||
return; | |||||
__free_pages(virt_to_page((void *)addr), order); | |||||
} | |||||
/* | |||||
* 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_arena, size, gfp_mask, 0, -1, | |||||
size, 0, VM_MEMATTR_DEFAULT); | |||||
if (page == 0) | |||||
return (NULL); | |||||
return (virt_to_page(page)); | |||||
} | |||||
static inline uintptr_t __get_free_pages(gfp_t gfp_mask, unsigned int order) | |||||
{ | |||||
struct page *page; | |||||
page = alloc_pages(gfp_mask, order); | |||||
if (page == NULL) | |||||
return (0); | |||||
return ((uintptr_t)page_address(page)); | |||||
} | |||||
#define alloc_pages_node(node, mask, order) alloc_pages(mask, order) | |||||
#define kmalloc_node(chunk, mask, node) kmalloc(chunk, mask) | |||||
#endif /* _LINUX_GFP_H_ */ |