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 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 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 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 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