1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
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.
17 *
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.
28 *
29 * $FreeBSD: stable/11/sys/compat/linuxkpi/common/include/linux/io-mapping.h 328653 2018-02-01 13:01:44Z hselasky $
30 */
31
32#ifndef _LINUX_IO_MAPPING_H_
33#define	_LINUX_IO_MAPPING_H_
34
35#include <sys/types.h>
36#include <machine/vm.h>
37
38#include <linux/types.h>
39#include <linux/io.h>
40#include <linux/slab.h>
41
42struct io_mapping {
43	unsigned long base;
44	unsigned long size;
45	void *mem;
46	vm_memattr_t attr;
47};
48
49static inline struct io_mapping *
50io_mapping_init_wc(struct io_mapping *mapping, resource_size_t base,
51    unsigned long size)
52{
53
54	mapping->base = base;
55	mapping->size = size;
56#ifdef VM_MEMATTR_WRITE_COMBINING
57	mapping->mem = ioremap_wc(base, size);
58	mapping->attr = VM_MEMATTR_WRITE_COMBINING;
59#else
60	mapping->mem = ioremap_nocache(base, size);
61	mapping->attr = VM_MEMATTR_UNCACHEABLE;
62#endif
63	return (mapping);
64}
65
66static inline struct io_mapping *
67io_mapping_create_wc(resource_size_t base, unsigned long size)
68{
69	struct io_mapping *mapping;
70
71	mapping = kmalloc(sizeof(*mapping), GFP_KERNEL);
72	if (mapping == NULL)
73		return (NULL);
74	return (io_mapping_init_wc(mapping, base, size));
75}
76
77static inline void
78io_mapping_fini(struct io_mapping *mapping)
79{
80
81	iounmap(mapping->mem);
82}
83
84static inline void
85io_mapping_free(struct io_mapping *mapping)
86{
87
88	io_mapping_fini(mapping->mem);
89	kfree(mapping);
90}
91
92static inline void *
93io_mapping_map_atomic_wc(struct io_mapping *mapping, unsigned long offset)
94{
95
96	return ((char *)mapping->mem + offset);
97}
98
99static inline void
100io_mapping_unmap_atomic(void *vaddr)
101{
102}
103
104static inline void *
105io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset,
106    unsigned long size)
107{
108
109	return ((char *)mapping->mem + offset);
110}
111
112static inline void
113io_mapping_unmap(void *vaddr)
114{
115}
116
117#endif /* _LINUX_IO_MAPPING_H_ */
118