1 /*-
2 * Copyright (c) 2017 Mellanox Technologies, Ltd.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #ifndef _LINUXKPI_LINUX_PFN_T_H_
28 #define _LINUXKPI_LINUX_PFN_T_H_
29
30 #include <linux/mm.h>
31
32 CTASSERT(PAGE_SHIFT > 4);
33
34 #define PFN_FLAGS_MASK (((u64)(PAGE_SIZE - 1)) << (64 - PAGE_SHIFT))
35 #define PFN_SG_CHAIN (1ULL << (64 - 1))
36 #define PFN_SG_LAST (1ULL << (64 - 2))
37 #define PFN_DEV (1ULL << (64 - 3))
38 #define PFN_MAP (1ULL << (64 - 4))
39
40 static inline pfn_t
__pfn_to_pfn_t(unsigned long pfn,u64 flags)41 __pfn_to_pfn_t(unsigned long pfn, u64 flags)
42 {
43 pfn_t pfn_t = { pfn | (flags & PFN_FLAGS_MASK) };
44
45 return (pfn_t);
46 }
47
48 static inline pfn_t
pfn_to_pfn_t(unsigned long pfn)49 pfn_to_pfn_t(unsigned long pfn)
50 {
51 return (__pfn_to_pfn_t (pfn, 0));
52 }
53
54 #endif /* _LINUXKPI_LINUX_PFN_T_H_ */
55