2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #include <sys/systm.h>
33 #include <sys/malloc.h>
35 #include <linux/page.h>
37 #include <vm/vm_param.h>
38 #include <vm/vm_object.h>
39 #include <vm/vm_extern.h>
40 #include <vm/vm_kern.h>
42 #define __GFP_NOWARN 0
43 #define __GFP_HIGHMEM 0
44 #define __GFP_ZERO M_ZERO
46 #define GFP_NOWAIT M_NOWAIT
47 #define GFP_ATOMIC (M_NOWAIT | M_USE_RESERVE)
48 #define GFP_KERNEL M_WAITOK
49 #define GFP_USER M_WAITOK
50 #define GFP_HIGHUSER M_WAITOK
51 #define GFP_HIGHUSER_MOVABLE M_WAITOK
52 #define GFP_IOFS M_NOWAIT
55 page_address(struct page *page)
58 if (page->object != kmem_object && page->object != kernel_object)
60 return ((void *)(uintptr_t)(VM_MIN_KERNEL_ADDRESS +
61 IDX_TO_OFF(page->pindex)));
64 static inline unsigned long
68 return kmem_malloc(kmem_arena, PAGE_SIZE, mask);
71 #define get_zeroed_page(mask) _get_page((mask) | M_ZERO)
72 #define alloc_page(mask) virt_to_page(_get_page((mask)))
73 #define __get_free_page(mask) _get_page((mask))
76 free_page(unsigned long page)
81 kmem_free(kmem_arena, page, PAGE_SIZE);
85 __free_page(struct page *m)
88 if (m->object != kmem_object)
89 panic("__free_page: Freed page %p not allocated via wrappers.",
91 kmem_free(kmem_arena, (vm_offset_t)page_address(m), PAGE_SIZE);
95 __free_pages(struct page *m, unsigned int order)
101 size = PAGE_SIZE << order;
102 kmem_free(kmem_arena, (vm_offset_t)page_address(m), size);
106 * Alloc pages allocates directly from the buddy allocator on linux so
107 * order specifies a power of two bucket of pages and the results
108 * are expected to be aligned on the size as well.
110 static inline struct page *
111 alloc_pages(gfp_t gfp_mask, unsigned int order)
116 size = PAGE_SIZE << order;
117 page = kmem_alloc_contig(kmem_arena, size, gfp_mask, 0, -1,
118 size, 0, VM_MEMATTR_DEFAULT);
121 return (virt_to_page(page));
124 #define alloc_pages_node(node, mask, order) alloc_pages(mask, order)
126 #define kmalloc_node(chunk, mask, node) kmalloc(chunk, mask)
128 #endif /* _LINUX_GFP_H_ */