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: releng/8.1/sys/dev/acpica/acpi_quirk.c 193530 2009-06-05 18:44:36Z jkim $");
29
30 #include <sys/param.h>
31 #include <sys/bus.h>
32
33 #include <contrib/dev/acpica/include/acpi.h>
34
35 #include <dev/acpica/acpivar.h>
36
37 enum ops_t {
38 OP_NONE,
39 OP_LEQ,
40 OP_GEQ,
41 OP_EQL,
42 };
43
44 enum val_t {
45 OEM,
46 OEM_REV,
47 CREATOR,
48 CREATOR_REV,
49 };
50
51 struct acpi_q_rule {
52 char sig[ACPI_NAME_SIZE]; /* Table signature to match */
53 enum val_t val;
54 union {
55 char *id;
56 enum ops_t op;
57 } x;
58 union {
59 char *tid;
60 int rev;
61 } y;
62 };
63
64 struct acpi_q_entry {
65 const struct acpi_q_rule *match;
66 int quirks;
67 };
68
69 #include "acpi_quirks.h"
70
71 static int aq_revcmp(int revision, enum ops_t op, int value);
72 static int aq_strcmp(char *actual, char *possible);
73 static int aq_match_header(ACPI_TABLE_HEADER *hdr,
74 const struct acpi_q_rule *match);
75
76 static int
77 aq_revcmp(int revision, enum ops_t op, int value)
78 {
79 switch (op) {
80 case OP_LEQ:
81 if (revision <= value)
82 return (TRUE);
83 break;
84 case OP_GEQ:
85 if (revision >= value)
86 return (TRUE);
87 break;
88 case OP_EQL:
89 if (revision == value)
90 return (TRUE);
91 break;
92 case OP_NONE:
93 return (TRUE);
94 default:
95 panic("aq_revcmp: invalid op %d", op);
96 }
97
98 return (FALSE);
99 }
100
101 static int
102 aq_strcmp(char *actual, char *possible)
103 {
104 if (actual == NULL || possible == NULL)
105 return (TRUE);
106 return (strncmp(actual, possible, strlen(possible)) == 0);
107 }
108
109 static int
110 aq_match_header(ACPI_TABLE_HEADER *hdr, const struct acpi_q_rule *match)
111 {
112 int result;
113
114 result = FALSE;
115 switch (match->val) {
116 case OEM:
117 if (aq_strcmp(hdr->OemId, match->x.id) &&
118 aq_strcmp(hdr->OemTableId, match->y.tid))
119 result = TRUE;
120 break;
121 case CREATOR:
122 if (aq_strcmp(hdr->AslCompilerId, match->x.id))
123 result = TRUE;
124 break;
125 case OEM_REV:
126 if (aq_revcmp(hdr->OemRevision, match->x.op, match->y.rev))
127 result = TRUE;
128 break;
129 case CREATOR_REV:
130 if (aq_revcmp(hdr->AslCompilerRevision, match->x.op, match->y.rev))
131 result = TRUE;
132 break;
133 }
134
135 return (result);
136 }
137
138 int
139 acpi_table_quirks(int *quirks)
140 {
141 const struct acpi_q_entry *entry;
142 const struct acpi_q_rule *match;
143 ACPI_TABLE_HEADER fadt, dsdt, xsdt, *hdr;
144 int done;
145
146 /* First, allow the machdep system to set its idea of quirks. */
147 KASSERT(quirks != NULL, ("acpi quirks ptr is NULL"));
148 acpi_machdep_quirks(quirks);
149
150 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_FADT, 0, &fadt)))
151 bzero(&fadt, sizeof(fadt));
152 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_DSDT, 0, &dsdt)))
153 bzero(&dsdt, sizeof(dsdt));
154 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_XSDT, 0, &xsdt)))
155 bzero(&xsdt, sizeof(xsdt));
156
157 /* Then, override the quirks with any matched from table signatures. */
158 for (entry = acpi_quirks_table; entry->match; entry++) {
159 done = TRUE;
160 for (match = entry->match; match->sig[0] != '\0'; match++) {
161 if (!strncmp(match->sig, "FADT", ACPI_NAME_SIZE))
162 hdr = &fadt;
163 else if (!strncmp(match->sig, ACPI_SIG_DSDT, ACPI_NAME_SIZE))
164 hdr = &dsdt;
165 else if (!strncmp(match->sig, ACPI_SIG_XSDT, ACPI_NAME_SIZE))
166 hdr = &xsdt;
167 else
168 panic("invalid quirk header\n");
169
170 /* If we don't match any, skip to the next entry. */
171 if (aq_match_header(hdr, match) == FALSE) {
172 done = FALSE;
173 break;
174 }
175 }
176
177 /* If all entries matched, update the quirks and return. */
178 if (done) {
179 *quirks = entry->quirks;
180 break;
181 }
182 }
183
184 return (0);
185 }
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