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 * $FreeBSD: head/sys/dev/acpica/acpi_quirk.c 193530 2009-06-05 18:44:36Z jkim $ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/bus.h> 31 32 #include <contrib/dev/acpica/source/include/acpi.h> 33 34 #include <dev/acpica/acpivar.h> 35 36 enum ops_t { 37 OP_NONE, 38 OP_LEQ, 39 OP_GEQ, 40 OP_EQL, 41 }; 42 43 enum val_t { 44 OEM, 45 OEM_REV, 46 CREATOR, 47 CREATOR_REV, 48 }; 49 50 struct acpi_q_rule { 51 char sig[ACPI_NAMESEG_SIZE]; /* Table signature to match */ 52 enum val_t val; 53 union { 54 char *id; 55 enum ops_t op; 56 } x; 57 union { 58 char *tid; 59 int rev; 60 } y; 61 }; 62 63 struct acpi_q_entry { 64 const struct acpi_q_rule *match; 65 int quirks; 66 }; 67 68 #include "acpi_quirks.h" 69 70 static int aq_revcmp(int revision, enum ops_t op, int value); 71 static int aq_strcmp(char *actual, char *possible); 72 static int aq_match_header(ACPI_TABLE_HEADER *hdr, 73 const struct acpi_q_rule *match); 74 75 static int 76 aq_revcmp(int revision, enum ops_t op, int value) 77 { 78 switch (op) { 79 case OP_LEQ: 80 if (revision <= value) 81 return (TRUE); 82 break; 83 case OP_GEQ: 84 if (revision >= value) 85 return (TRUE); 86 break; 87 case OP_EQL: 88 if (revision == value) 89 return (TRUE); 90 break; 91 case OP_NONE: 92 return (TRUE); 93 default: 94 panic("aq_revcmp: invalid op %d", op); 95 } 96 97 return (FALSE); 98 } 99 100 static int 101 aq_strcmp(char *actual, char *possible) 102 { 103 if (actual == NULL || possible == NULL) 104 return (TRUE); 105 return (strncmp(actual, possible, strlen(possible)) == 0); 106 } 107 108 static int 109 aq_match_header(ACPI_TABLE_HEADER *hdr, const struct acpi_q_rule *match) 110 { 111 int result; 112 113 result = FALSE; 114 switch (match->val) { 115 case OEM: 116 if (aq_strcmp(hdr->OemId, match->x.id) && 117 aq_strcmp(hdr->OemTableId, match->y.tid)) 118 result = TRUE; 119 break; 120 case CREATOR: 121 if (aq_strcmp(hdr->AslCompilerId, match->x.id)) 122 result = TRUE; 123 break; 124 case OEM_REV: 125 if (aq_revcmp(hdr->OemRevision, match->x.op, match->y.rev)) 126 result = TRUE; 127 break; 128 case CREATOR_REV: 129 if (aq_revcmp(hdr->AslCompilerRevision, match->x.op, match->y.rev)) 130 result = TRUE; 131 break; 132 } 133 134 return (result); 135 } 136 137 int 138 acpi_table_quirks(int *quirks) 139 { 140 const struct acpi_q_entry *entry; 141 const struct acpi_q_rule *match; 142 ACPI_TABLE_HEADER fadt, dsdt, xsdt, *hdr; 143 int done; 144 145 /* First, allow the machdep system to set its idea of quirks. */ 146 KASSERT(quirks != NULL, ("acpi quirks ptr is NULL")); 147 acpi_machdep_quirks(quirks); 148 149 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_FADT, 0, &fadt))) 150 bzero(&fadt, sizeof(fadt)); 151 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_DSDT, 0, &dsdt))) 152 bzero(&dsdt, sizeof(dsdt)); 153 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_XSDT, 0, &xsdt))) 154 bzero(&xsdt, sizeof(xsdt)); 155 156 /* Then, override the quirks with any matched from table signatures. */ 157 for (entry = acpi_quirks_table; entry->match; entry++) { 158 done = TRUE; 159 for (match = entry->match; match->sig[0] != '\0'; match++) { 160 if (ACPI_COMPARE_NAMESEG(match->sig, "FADT")) 161 hdr = &fadt; 162 else if (ACPI_COMPARE_NAMESEG(match->sig, ACPI_SIG_DSDT)) 163 hdr = &dsdt; 164 else if (ACPI_COMPARE_NAMESEG(match->sig, ACPI_SIG_XSDT)) 165 hdr = &xsdt; 166 else 167 panic("invalid quirk header\n"); 168 169 /* If we don't match any, skip to the next entry. */ 170 if (aq_match_header(hdr, match) == FALSE) { 171 done = FALSE; 172 break; 173 } 174 } 175 176 /* If all entries matched, update the quirks and return. */ 177 if (done) { 178 *quirks = entry->quirks; 179 break; 180 } 181 } 182 183 return (0); 184 } 185