1/*-
2 * Copyright (c) 2004 Nate Lawson (SDG)
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, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi_quirk.c 148318 2005-07-22 23:10:02Z njl $");
29
30#include <sys/param.h>
31#include <sys/bus.h>
32
33#include "acpi.h"
34#include <dev/acpica/acpivar.h>
35
36enum ops_t {
37 OP_NONE,
38 OP_LEQ,
39 OP_GEQ,
40 OP_EQL,
41};
42
43enum val_t {
44 OEM,
45 OEM_REV,
46 CREATOR,
47 CREATOR_REV,
48};
49
50#define ACPI_TABLE_END (ACPI_TABLE_MAX + 1)
51
52struct acpi_q_rule {
53 int sig; /* Table signature to match */
54 enum val_t val;
55 union {
56 char *id;
57 enum ops_t op;
58 } x;
59 union {
60 char *tid;
61 int rev;
62 } y;
63};
64
65struct acpi_q_entry {
66 const struct acpi_q_rule *match;
67 int quirks;
68};
69
70#include "acpi_quirks.h"
71
72static int aq_revcmp(int revision, enum ops_t op, int value);
73static int aq_strcmp(char *actual, char *possible);
74static int aq_match_header(ACPI_TABLE_HEADER *hdr,
75 const struct acpi_q_rule *match);
76
77static int
78aq_revcmp(int revision, enum ops_t op, int value)
79{
80 switch (op) {
81 case OP_LEQ:
82 if (revision <= value)
83 return (TRUE);
84 break;
85 case OP_GEQ:
86 if (revision >= value)
87 return (TRUE);
88 break;
89 case OP_EQL:
90 if (revision == value)
91 return (TRUE);
92 break;
93 case OP_NONE:
94 return (TRUE);
95 default:
96 panic("aq_revcmp: invalid op %d", op);
97 }
98
99 return (FALSE);
100}
101
102static int
103aq_strcmp(char *actual, char *possible)
104{
105 if (actual == NULL || possible == NULL)
106 return (TRUE);
107 return (strncmp(actual, possible, strlen(possible)) == 0);
108}
109
110static int
111aq_match_header(ACPI_TABLE_HEADER *hdr, const struct acpi_q_rule *match)
112{
113 int result;
114
115 result = FALSE;
116 switch (match->val) {
117 case OEM:
118 if (aq_strcmp(hdr->OemId, match->x.id) &&
119 aq_strcmp(hdr->OemTableId, match->y.tid))
120 result = TRUE;
121 break;
122 case CREATOR:
123 if (aq_strcmp(hdr->AslCompilerId, match->x.id))
124 result = TRUE;
125 break;
126 case OEM_REV:
127 if (aq_revcmp(hdr->OemRevision, match->x.op, match->y.rev))
128 result = TRUE;
129 break;
130 case CREATOR_REV:
131 if (aq_revcmp(hdr->AslCompilerRevision, match->x.op, match->y.rev))
132 result = TRUE;
133 break;
134 }
135
136 return (result);
137}
138
139int
140acpi_table_quirks(int *quirks)
141{
142 const struct acpi_q_entry *entry;
143 const struct acpi_q_rule *match;
144 ACPI_TABLE_HEADER *hdr;
145 int done;
146
147 /* First, allow the machdep system to set its idea of quirks. */
148 KASSERT(quirks != NULL, ("acpi quirks ptr is NULL"));
149 acpi_machdep_quirks(quirks);
150
151 /* Then, override the quirks with any matched from table signatures. */
152 for (entry = acpi_quirks_table; entry->match; entry++) {
153 done = TRUE;
154 for (match = entry->match; match->sig != ACPI_TABLE_END; match++) {
155 switch (match->sig) {
156 case ACPI_TABLE_FADT:
157 hdr = (ACPI_TABLE_HEADER *)AcpiGbl_FADT;
158 break;
159 case ACPI_TABLE_DSDT:
160 hdr = (ACPI_TABLE_HEADER *)AcpiGbl_DSDT;
161 break;
162 case ACPI_TABLE_XSDT:
163 hdr = (ACPI_TABLE_HEADER *)AcpiGbl_XSDT;
164 break;
165 default:
166 panic("invalid quirk header\n");
167 }
168
169 /* If we don't match any, skip to the next entry. */
170 if (!aq_match_header(hdr, match)) {
171 done = FALSE;
172 break;
173 }
174 }
175
176 /* If all entries matched, update the quirks and return. */
177 if (done) {
178 *quirks = entry->quirks;
179 break;
180 }
181 }
182
183 return (0);
184}