2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013 Mellanox Technologies, Ltd.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #include <sys/cdefs.h>
35 #include <sys/types.h>
36 #include <sys/systm.h>
37 #include <sys/malloc.h>
39 #include <linux/page.h>
41 #include <vm/vm_param.h>
42 #include <vm/vm_object.h>
43 #include <vm/vm_extern.h>
44 #include <vm/vm_kern.h>
46 #define __GFP_NOWARN 0
47 #define __GFP_HIGHMEM 0
48 #define __GFP_ZERO M_ZERO
50 #define GFP_NOWAIT M_NOWAIT
51 #define GFP_ATOMIC (M_NOWAIT | M_USE_RESERVE)
52 #define GFP_KERNEL M_WAITOK
53 #define GFP_USER M_WAITOK
54 #define GFP_HIGHUSER M_WAITOK
55 #define GFP_HIGHUSER_MOVABLE M_WAITOK
56 #define GFP_IOFS M_NOWAIT
57 #define GFP_NOIO M_NOWAIT
60 page_address(struct page *page)
63 if (page->object != kmem_object && page->object != kernel_object)
65 return ((void *)(uintptr_t)(VM_MIN_KERNEL_ADDRESS +
66 IDX_TO_OFF(page->pindex)));
69 static inline unsigned long
70 linux_get_page(gfp_t mask)
73 return kmem_malloc(kmem_arena, PAGE_SIZE, mask);
76 #define get_zeroed_page(mask) linux_get_page((mask) | M_ZERO)
77 #define alloc_page(mask) virt_to_page(linux_get_page((mask)))
78 #define __get_free_page(mask) linux_get_page((mask))
81 free_page(unsigned long page)
86 kmem_free(kmem_arena, page, PAGE_SIZE);
90 __free_page(struct page *m)
93 if (m->object != kmem_object)
94 panic("__free_page: Freed page %p not allocated via wrappers.",
96 kmem_free(kmem_arena, (vm_offset_t)page_address(m), PAGE_SIZE);
100 __free_pages(struct page *m, unsigned int order)
106 size = PAGE_SIZE << order;
107 kmem_free(kmem_arena, (vm_offset_t)page_address(m), size);
110 static inline void free_pages(uintptr_t addr, unsigned int order)
114 __free_pages(virt_to_page((void *)addr), order);
118 * Alloc pages allocates directly from the buddy allocator on linux so
119 * order specifies a power of two bucket of pages and the results
120 * are expected to be aligned on the size as well.
122 static inline struct page *
123 alloc_pages(gfp_t gfp_mask, unsigned int order)
128 size = PAGE_SIZE << order;
129 page = kmem_alloc_contig(kmem_arena, size, gfp_mask, 0, -1,
130 size, 0, VM_MEMATTR_DEFAULT);
133 return (virt_to_page(page));
136 static inline uintptr_t __get_free_pages(gfp_t gfp_mask, unsigned int order)
140 page = alloc_pages(gfp_mask, order);
143 return ((uintptr_t)page_address(page));
146 #define alloc_pages_node(node, mask, order) alloc_pages(mask, order)
148 #define kmalloc_node(chunk, mask, node) kmalloc(chunk, mask)
150 #endif /* _LINUX_GFP_H_ */