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/acpi.h> 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 #define ACPI_TABLE_END (ACPI_TABLE_MAX + 1) 51 52 struct acpi_q_rule { 53 int sig; /* Table signature to match */ 54 enum val_t val; 55 union { 56 char *id; 57 enum ops_t op; 58 } x; 59 union { 60 char *tid; 61 int rev; 62 } y; 63 }; 64 65 struct acpi_q_entry { 66 const struct acpi_q_rule *match; 67 int quirks; 68 }; 69 70 #include "acpi_quirks.h" 71 72 static int aq_revcmp(int revision, enum ops_t op, int value); 73 static int aq_strcmp(char *actual, char *possible); 74 static int aq_match_header(ACPI_TABLE_HEADER *hdr, 75 const struct acpi_q_rule *match); 76 77 static int 78 aq_revcmp(int revision, enum ops_t op, int value) 79 { 80 switch (op) { 81 case OP_LEQ: 82 if (revision <= value) 83 return (TRUE); 84 break; 85 case OP_GEQ: 86 if (revision >= value) 87 return (TRUE); 88 break; 89 case OP_EQL: 90 if (revision == value) 91 return (TRUE); 92 break; 93 case OP_NONE: 94 return (TRUE); 95 default: 96 panic("aq_revcmp: invalid op %d", op); 97 } 98 99 return (FALSE); 100 } 101 102 static int 103 aq_strcmp(char *actual, char *possible) 104 { 105 if (actual == NULL || possible == NULL) 106 return (TRUE); 107 return (strncmp(actual, possible, strlen(possible)) == 0); 108 } 109 110 static int 111 aq_match_header(ACPI_TABLE_HEADER *hdr, const struct acpi_q_rule *match) 112 { 113 int result; 114 115 result = FALSE; 116 switch (match->val) { 117 case OEM: 118 if (aq_strcmp(hdr->OemId, match->x.id) && 119 aq_strcmp(hdr->OemTableId, match->y.tid)) 120 result = TRUE; 121 break; 122 case CREATOR: 123 if (aq_strcmp(hdr->AslCompilerId, match->x.id)) 124 result = TRUE; 125 break; 126 case OEM_REV: 127 if (aq_revcmp(hdr->OemRevision, match->x.op, match->y.rev)) 128 result = TRUE; 129 break; 130 case CREATOR_REV: 131 if (aq_revcmp(hdr->AslCompilerRevision, match->x.op, match->y.rev)) 132 result = TRUE; 133 break; 134 } 135 136 return (result); 137 } 138 139 int 140 acpi_table_quirks(int *quirks) 141 { 142 const struct acpi_q_entry *entry; 143 const struct acpi_q_rule *match; 144 ACPI_TABLE_HEADER *hdr; 145 int done; 146 147 /* First, allow the machdep system to set its idea of quirks. */ 148 KASSERT(quirks != NULL, ("acpi quirks ptr is NULL")); 149 acpi_machdep_quirks(quirks); 150 151 /* Then, override the quirks with any matched from table signatures. */ 152 for (entry = acpi_quirks_table; entry->match; entry++) { 153 done = TRUE; 154 for (match = entry->match; match->sig != ACPI_TABLE_END; match++) { 155 switch (match->sig) { 156 case ACPI_TABLE_FADT: 157 hdr = (ACPI_TABLE_HEADER *)AcpiGbl_FADT; 158 break; 159 case ACPI_TABLE_DSDT: 160 hdr = (ACPI_TABLE_HEADER *)AcpiGbl_DSDT; 161 break; 162 case ACPI_TABLE_XSDT: 163 hdr = (ACPI_TABLE_HEADER *)AcpiGbl_XSDT; 164 break; 165 default: 166 panic("invalid quirk header\n"); 167 } 168 169 /* If we don't match any, skip to the next entry. */ 170 if (!aq_match_header(hdr, match)) { 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