1 /*- 2 * Copyright (c) 2020 The FreeBSD Foundation 3 * 4 * This software was developed by Emmanuel Vadot under sponsorship 5 * from the FreeBSD Foundation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 35 #include <linux/dmi.h> 36 37 static char *dmi_data[DMI_STRING_MAX]; 38 39 static void 40 linux_dmi_preload(void *arg) 41 { 42 43 dmi_data[DMI_BIOS_VENDOR] = kern_getenv("smbios.bios.vendor"); 44 dmi_data[DMI_BIOS_VERSION] = kern_getenv("smbios.bios.version"); 45 dmi_data[DMI_BIOS_DATE] = kern_getenv("smbios.bios.reldate"); 46 dmi_data[DMI_SYS_VENDOR] = kern_getenv("smbios.system.maker"); 47 dmi_data[DMI_PRODUCT_NAME] = kern_getenv("smbios.system.product"); 48 dmi_data[DMI_PRODUCT_VERSION] = kern_getenv("smbios.system.version"); 49 dmi_data[DMI_PRODUCT_SERIAL] = kern_getenv("smbios.system.serial"); 50 dmi_data[DMI_PRODUCT_UUID] = kern_getenv("smbios.system.uuid"); 51 dmi_data[DMI_BOARD_VENDOR] = kern_getenv("smbios.planar.maker"); 52 dmi_data[DMI_BOARD_NAME] = kern_getenv("smbios.planar.product"); 53 dmi_data[DMI_BOARD_VERSION] = kern_getenv("smbios.planar.version"); 54 dmi_data[DMI_BOARD_SERIAL] = kern_getenv("smbios.planar.serial"); 55 dmi_data[DMI_BOARD_ASSET_TAG] = kern_getenv("smbios.planar.tag"); 56 dmi_data[DMI_CHASSIS_VENDOR] = kern_getenv("smbios.chassis.maker"); 57 dmi_data[DMI_CHASSIS_TYPE] = kern_getenv("smbios.chassis.type"); 58 dmi_data[DMI_CHASSIS_VERSION] = kern_getenv("smbios.chassis.version"); 59 dmi_data[DMI_CHASSIS_SERIAL] = kern_getenv("smbios.chassis.serial"); 60 dmi_data[DMI_CHASSIS_ASSET_TAG] = kern_getenv("smbios.chassis.tag"); 61 } 62 SYSINIT(linux_dmi_preload, SI_SUB_DRIVERS, SI_ORDER_ANY, linux_dmi_preload, NULL); 63 64 /* Match a system against a field */ 65 bool 66 linux_dmi_match(enum dmi_field f, const char *str) 67 { 68 69 if (f < DMI_STRING_MAX && 70 dmi_data[f] != NULL && 71 strcmp(dmi_data[f], str) == 0) 72 return(true); 73 return (false); 74 } 75 76 /* Match a system against the struct, all matches must be ok */ 77 static bool 78 linux_dmi_matches(const struct dmi_system_id *dsi) 79 { 80 int i; 81 82 for (i = 0; i < nitems(dsi->matches); i++) { 83 if (dsi->matches[i].slot == DMI_NONE) 84 break; 85 if (dmi_match(dsi->matches[i].slot, 86 dsi->matches[i].substr) == false) 87 return (false); 88 } 89 90 return (true); 91 } 92 93 /* Return the string matching the field */ 94 const char * 95 linux_dmi_get_system_info(int field) 96 { 97 98 if (field < DMI_STRING_MAX) 99 return (dmi_data[field]); 100 return (NULL); 101 } 102 103 /* 104 * Match a system against the structs list 105 * If a match is found return the corresponding structure. 106 */ 107 const struct dmi_system_id * 108 linux_dmi_first_match(const struct dmi_system_id *list) 109 { 110 const struct dmi_system_id *dsi; 111 112 for (dsi = list; dsi->matches[0].slot != 0; dsi++) { 113 if (linux_dmi_matches(dsi)) 114 return (dsi); 115 } 116 117 return (NULL); 118 } 119 120 /* 121 * Match a system against the structs list 122 * For each match call the callback with the corresponding data 123 * Return the number of matches. 124 */ 125 int 126 linux_dmi_check_system(const struct dmi_system_id *sysid) 127 { 128 const struct dmi_system_id *dsi; 129 int matches = 0; 130 131 for (dsi = sysid; dsi->matches[0].slot != 0; dsi++) { 132 if (linux_dmi_matches(dsi)) { 133 matches++; 134 if (dsi->callback && dsi->callback(dsi)) 135 break; 136 } 137 } 138 139 return (matches); 140 } 141