1/*-
2 * Copyright (c) 2006 Marcel Moolenaar
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 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following 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#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/11/stand/efi/libefi/handles.c 294068 2016-01-15 02:33:47Z smh $");
29
30#include <efi.h>
31#include <efilib.h>
32
33struct entry {
34	EFI_HANDLE handle;
35	EFI_HANDLE alias;
36	struct devsw *dev;
37	int unit;
38	uint64_t extra;
39};
40
41struct entry *entry;
42int nentries;
43
44int
45efi_register_handles(struct devsw *sw, EFI_HANDLE *handles,
46    EFI_HANDLE *aliases, int count)
47{
48	size_t sz;
49	int idx, unit;
50
51	idx = nentries;
52	nentries += count;
53	sz = nentries * sizeof(struct entry);
54	entry = (entry == NULL) ? malloc(sz) : realloc(entry, sz);
55	for (unit = 0; idx < nentries; idx++, unit++) {
56		entry[idx].handle = handles[unit];
57		if (aliases != NULL)
58			entry[idx].alias = aliases[unit];
59		else
60			entry[idx].alias = NULL;
61		entry[idx].dev = sw;
62		entry[idx].unit = unit;
63	}
64	return (0);
65}
66
67EFI_HANDLE
68efi_find_handle(struct devsw *dev, int unit)
69{
70	int idx;
71
72	for (idx = 0; idx < nentries; idx++) {
73		if (entry[idx].dev != dev)
74			continue;
75		if (entry[idx].unit != unit)
76			continue;
77		return (entry[idx].handle);
78	}
79	return (NULL);
80}
81
82int
83efi_handle_lookup(EFI_HANDLE h, struct devsw **dev, int *unit, uint64_t *extra)
84{
85	int idx;
86
87	for (idx = 0; idx < nentries; idx++) {
88		if (entry[idx].handle != h && entry[idx].alias != h)
89			continue;
90		if (dev != NULL)
91			*dev = entry[idx].dev;
92		if (unit != NULL)
93			*unit = entry[idx].unit;
94		if (extra != NULL)
95			*extra = entry[idx].extra;
96		return (0);
97	}
98	return (ENOENT);
99}
100
101int
102efi_handle_update_dev(EFI_HANDLE h, struct devsw *dev, int unit,
103    uint64_t guid)
104{
105	int idx;
106
107	for (idx = 0; idx < nentries; idx++) {
108		if (entry[idx].handle != h)
109			continue;
110		entry[idx].dev = dev;
111		entry[idx].unit = unit;
112		entry[idx].alias = NULL;
113		entry[idx].extra = guid;
114		return (0);
115	}
116
117	return (ENOENT);
118}
119