164 lines
4.4 KiB
C
164 lines
4.4 KiB
C
/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* Copyright (c) 2013 Mellanox Technologies, Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_GFP_H_
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#define _LINUX_GFP_H_
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <linux/page.h>
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#include <vm/vm_param.h>
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#include <vm/vm_object.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_kern.h>
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#define __GFP_NOWARN 0
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#define __GFP_HIGHMEM 0
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#define __GFP_ZERO M_ZERO
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#define __GFP_NORETRY 0
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#define __GFP_RECLAIM 0
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#define __GFP_RECLAIMABLE 0
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#define __GFP_IO 0
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#define __GFP_NO_KSWAPD 0
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#define __GFP_WAIT M_WAITOK
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#define __GFP_DMA32 0
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#define GFP_NOWAIT M_NOWAIT
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#define GFP_ATOMIC (M_NOWAIT | M_USE_RESERVE)
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#define GFP_KERNEL M_WAITOK
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#define GFP_USER M_WAITOK
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#define GFP_HIGHUSER M_WAITOK
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#define GFP_HIGHUSER_MOVABLE M_WAITOK
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#define GFP_IOFS M_NOWAIT
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#define GFP_NOIO M_NOWAIT
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#define GFP_DMA32 0
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#define GFP_TEMPORARY 0
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static inline void *
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page_address(struct page *page)
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{
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if (page->object != kmem_object && page->object != kernel_object)
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return (NULL);
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return ((void *)(uintptr_t)(VM_MIN_KERNEL_ADDRESS +
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IDX_TO_OFF(page->pindex)));
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}
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static inline unsigned long
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linux_get_page(gfp_t mask)
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{
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return kmem_malloc(kmem_arena, PAGE_SIZE, mask);
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}
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#define get_zeroed_page(mask) linux_get_page((mask) | M_ZERO)
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#define alloc_page(mask) virt_to_page(linux_get_page((mask)))
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#define __get_free_page(mask) linux_get_page((mask))
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static inline void
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free_page(unsigned long page)
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{
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if (page == 0)
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return;
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kmem_free(kmem_arena, page, PAGE_SIZE);
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}
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static inline void
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__free_page(struct page *m)
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{
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if (m->object != kmem_object)
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panic("__free_page: Freed page %p not allocated via wrappers.",
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m);
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kmem_free(kmem_arena, (vm_offset_t)page_address(m), PAGE_SIZE);
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}
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static inline void
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__free_pages(struct page *m, unsigned int order)
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{
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size_t size;
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if (m == NULL)
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return;
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size = PAGE_SIZE << order;
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kmem_free(kmem_arena, (vm_offset_t)page_address(m), size);
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}
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static inline void free_pages(uintptr_t addr, unsigned int order)
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{
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if (addr == 0)
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return;
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__free_pages(virt_to_page((void *)addr), order);
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}
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/*
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* Alloc pages allocates directly from the buddy allocator on linux so
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* order specifies a power of two bucket of pages and the results
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* are expected to be aligned on the size as well.
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*/
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static inline struct page *
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alloc_pages(gfp_t gfp_mask, unsigned int order)
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{
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unsigned long page;
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size_t size;
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size = PAGE_SIZE << order;
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page = kmem_alloc_contig(kmem_arena, size, gfp_mask, 0, -1,
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size, 0, VM_MEMATTR_DEFAULT);
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if (page == 0)
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return (NULL);
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return (virt_to_page(page));
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}
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static inline uintptr_t __get_free_pages(gfp_t gfp_mask, unsigned int order)
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{
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struct page *page;
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page = alloc_pages(gfp_mask, order);
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if (page == NULL)
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return (0);
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return ((uintptr_t)page_address(page));
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}
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#define alloc_pages_node(node, mask, order) alloc_pages(mask, order)
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#define kmalloc_node(chunk, mask, node) kmalloc(chunk, mask)
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#define SetPageReserved(page) do { } while (0) /* NOP */
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#define ClearPageReserved(page) do { } while (0) /* NOP */
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#endif /* _LINUX_GFP_H_ */
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