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("$FreeBSD$"); 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 } 186