1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2016 Matthew Macy (mmacy@mattmacy.io)
* Copyright (c) 2017 Mellanox Technologies, Ltd.
* Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _LINUXKPI_LINUX_HIGHMEM_H_
#define _LINUXKPI_LINUX_HIGHMEM_H_
#include <sys/types.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sched.h>
#include <sys/sf_buf.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
#include <vm/pmap.h>
#include <linux/mm.h>
#include <linux/page.h>
#define PageHighMem(p) (0)
static inline struct page *
kmap_to_page(void *addr)
{
return (virt_to_page(addr));
}
static inline void *
kmap(struct page *page)
{
struct sf_buf *sf;
if (PMAP_HAS_DMAP) {
return ((void *)PHYS_TO_DMAP(page_to_phys(page)));
} else {
sched_pin();
sf = sf_buf_alloc(page, SFB_NOWAIT | SFB_CPUPRIVATE);
if (sf == NULL) {
sched_unpin();
return (NULL);
}
return ((void *)sf_buf_kva(sf));
}
}
static inline void *
kmap_atomic_prot(struct page *page, pgprot_t prot)
{
vm_memattr_t attr = pgprot2cachemode(prot);
if (attr != VM_MEMATTR_DEFAULT) {
vm_page_lock(page);
page->flags |= PG_FICTITIOUS;
vm_page_unlock(page);
pmap_page_set_memattr(page, attr);
}
return (kmap(page));
}
static inline void *
kmap_atomic(struct page *page)
{
return (kmap_atomic_prot(page, VM_PROT_ALL));
}
static inline void *
kmap_local_page(struct page *page)
{
return (kmap(page));
}
static inline void *
kmap_local_page_prot(struct page *page, pgprot_t prot)
{
return (kmap_atomic_prot(page, prot));
}
static inline void
kunmap(struct page *page)
{
struct sf_buf *sf;
if (!PMAP_HAS_DMAP) {
/* lookup SF buffer in list */
sf = sf_buf_alloc(page, SFB_NOWAIT | SFB_CPUPRIVATE);
/* double-free */
sf_buf_free(sf);
sf_buf_free(sf);
sched_unpin();
}
}
static inline void
kunmap_atomic(void *vaddr)
{
if (!PMAP_HAS_DMAP)
kunmap(virt_to_page(vaddr));
}
static inline void
kunmap_local(void *addr)
{
kunmap_atomic(addr);
}
#endif /* _LINUXKPI_LINUX_HIGHMEM_H_ */
|
