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