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/param.h> 28 #include <sys/bus.h> 29 30 #include <contrib/dev/acpica/include/acpi.h> 31 32 #include <dev/acpica/acpivar.h> 33 34 enum ops_t { 35 OP_NONE, 36 OP_LEQ, 37 OP_GEQ, 38 OP_EQL, 39 }; 40 41 enum val_t { 42 OEM, 43 OEM_REV, 44 CREATOR, 45 CREATOR_REV, 46 }; 47 48 struct acpi_q_rule { 49 char sig[ACPI_NAMESEG_SIZE]; /* Table signature to match */ 50 enum val_t val; 51 union { 52 char *id; 53 enum ops_t op; 54 } x; 55 union { 56 char *tid; 57 int rev; 58 } y; 59 }; 60 61 struct acpi_q_entry { 62 const struct acpi_q_rule *match; 63 int quirks; 64 }; 65 66 #include "acpi_quirks.h" 67 68 static int aq_revcmp(int revision, enum ops_t op, int value); 69 static int aq_strcmp(char *actual, char *possible); 70 static int aq_match_header(ACPI_TABLE_HEADER *hdr, 71 const struct acpi_q_rule *match); 72 73 static int 74 aq_revcmp(int revision, enum ops_t op, int value) 75 { 76 switch (op) { 77 case OP_LEQ: 78 if (revision <= value) 79 return (TRUE); 80 break; 81 case OP_GEQ: 82 if (revision >= value) 83 return (TRUE); 84 break; 85 case OP_EQL: 86 if (revision == value) 87 return (TRUE); 88 break; 89 case OP_NONE: 90 return (TRUE); 91 default: 92 panic("aq_revcmp: invalid op %d", op); 93 } 94 95 return (FALSE); 96 } 97 98 static int 99 aq_strcmp(char *actual, char *possible) 100 { 101 if (actual == NULL || possible == NULL) 102 return (TRUE); 103 return (strncmp(actual, possible, strlen(possible)) == 0); 104 } 105 106 static int 107 aq_match_header(ACPI_TABLE_HEADER *hdr, const struct acpi_q_rule *match) 108 { 109 int result; 110 111 result = FALSE; 112 switch (match->val) { 113 case OEM: 114 if (aq_strcmp(hdr->OemId, match->x.id) && 115 aq_strcmp(hdr->OemTableId, match->y.tid)) 116 result = TRUE; 117 break; 118 case CREATOR: 119 if (aq_strcmp(hdr->AslCompilerId, match->x.id)) 120 result = TRUE; 121 break; 122 case OEM_REV: 123 if (aq_revcmp(hdr->OemRevision, match->x.op, match->y.rev)) 124 result = TRUE; 125 break; 126 case CREATOR_REV: 127 if (aq_revcmp(hdr->AslCompilerRevision, match->x.op, match->y.rev)) 128 result = TRUE; 129 break; 130 } 131 132 return (result); 133 } 134 135 int 136 acpi_table_quirks(int *quirks) 137 { 138 const struct acpi_q_entry *entry; 139 const struct acpi_q_rule *match; 140 ACPI_TABLE_HEADER fadt, dsdt, xsdt, *hdr; 141 int done; 142 143 /* First, allow the machdep system to set its idea of quirks. */ 144 KASSERT(quirks != NULL, ("acpi quirks ptr is NULL")); 145 acpi_machdep_quirks(quirks); 146 147 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_FADT, 0, &fadt))) 148 bzero(&fadt, sizeof(fadt)); 149 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_DSDT, 0, &dsdt))) 150 bzero(&dsdt, sizeof(dsdt)); 151 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_XSDT, 0, &xsdt))) 152 bzero(&xsdt, sizeof(xsdt)); 153 154 /* Then, override the quirks with any matched from table signatures. */ 155 for (entry = acpi_quirks_table; entry->match; entry++) { 156 done = TRUE; 157 for (match = entry->match; match->sig[0] != '\0'; match++) { 158 if (!strncmp(match->sig, "FADT", ACPI_NAMESEG_SIZE)) 159 hdr = &fadt; 160 else if (!strncmp(match->sig, ACPI_SIG_DSDT, ACPI_NAMESEG_SIZE)) 161 hdr = &dsdt; 162 else if (!strncmp(match->sig, ACPI_SIG_XSDT, ACPI_NAMESEG_SIZE)) 163 hdr = &xsdt; 164 else 165 panic("invalid quirk header\n"); 166 167 /* If we don't match any, skip to the next entry. */ 168 if (aq_match_header(hdr, match) == FALSE) { 169 done = FALSE; 170 break; 171 } 172 } 173 174 /* If all entries matched, update the quirks and return. */ 175 if (done) { 176 *quirks = entry->quirks; 177 break; 178 } 179 } 180 181 return (0); 182 } 183