1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2016 Matt Macy (mmacy@nextbsd.org)
4 * Copyright (c) 2017 Mellanox Technologies, Ltd.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice unmodified, this list of conditions, and the following
12 *    disclaimer.
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.
16 *
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.
27 */
28
29#ifndef _LINUXKPI_ASM_SET_MEMORY_H_
30#define	_LINUXKPI_ASM_SET_MEMORY_H_
31
32#include <linux/page.h>
33
34static inline int
35set_memory_uc(unsigned long addr, int numpages)
36{
37	vm_size_t len;
38
39	len = (vm_size_t)numpages << PAGE_SHIFT;
40	return (-pmap_change_attr(addr, len, VM_MEMATTR_UNCACHEABLE));
41}
42
43static inline int
44set_memory_wc(unsigned long addr, int numpages)
45{
46#ifdef VM_MEMATTR_WRITE_COMBINING
47	vm_size_t len;
48
49	len = (vm_size_t)numpages << PAGE_SHIFT;
50	return (-pmap_change_attr(addr, len, VM_MEMATTR_WRITE_COMBINING));
51#else
52	return (set_memory_uc(addr, numpages));
53#endif
54}
55
56static inline int
57set_memory_wb(unsigned long addr, int numpages)
58{
59	vm_size_t len;
60
61	len = (vm_size_t)numpages << PAGE_SHIFT;
62	return (-pmap_change_attr(addr, len, VM_MEMATTR_WRITE_BACK));
63}
64
65static inline int
66set_pages_uc(struct page *page, int numpages)
67{
68	KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
69
70	pmap_page_set_memattr(page, VM_MEMATTR_UNCACHEABLE);
71	return (0);
72}
73
74static inline int
75set_pages_wc(struct page *page, int numpages)
76{
77	KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
78
79#ifdef VM_MEMATTR_WRITE_COMBINING
80	pmap_page_set_memattr(page, VM_MEMATTR_WRITE_COMBINING);
81#else
82	return (set_pages_uc(page, numpages));
83#endif
84	return (0);
85}
86
87static inline int
88set_pages_wb(struct page *page, int numpages)
89{
90	KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
91
92	pmap_page_set_memattr(page, VM_MEMATTR_WRITE_BACK);
93	return (0);
94}
95
96static inline int
97set_pages_array_wb(struct page **pages, int addrinarray)
98{
99	int i;
100
101	for (i = 0; i < addrinarray; i++)
102		set_pages_wb(pages[i], 1);
103	return (0);
104}
105
106static inline int
107set_pages_array_wc(struct page **pages, int addrinarray)
108{
109	int i;
110
111	for (i = 0; i < addrinarray; i++)
112		set_pages_wc(pages[i], 1);
113	return (0);
114}
115
116static inline int
117set_pages_array_uc(struct page **pages, int addrinarray)
118{
119	int i;
120
121	for (i = 0; i < addrinarray; i++)
122		set_pages_uc(pages[i], 1);
123	return (0);
124}
125
126#endif	/* _LINUXKPI_ASM_SET_MEMORY_H_ */
127