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linux_dmi.c revision 1.1.36.1 
      1 /*	$NetBSD: linux_dmi.c,v 1.1.36.1 2019/06/10 22:08:32 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 2014 NONAKA Kimihiro <nonaka (at) netbsd.org>
      5  * All rights reserved.
      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 ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: linux_dmi.c,v 1.1.36.1 2019/06/10 22:08:32 christos Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/types.h>
     33 #include <sys/pmf.h>
     34 
     35 #include <linux/dmi.h>
     36 
     37 bool
     38 dmi_match(enum dmi_field slot, const char *text)
     39 {
     40 	const char *p = NULL;
     41 
     42 	switch (slot) {
     43 	case DMI_NONE:
     44 		aprint_error("%s: dmi_match on none makes no sense", __func__);
     45 		return false;
     46 	case DMI_BIOS_VENDOR:
     47 		p = pmf_get_platform("bios-vendor");
     48 		break;
     49 	case DMI_BIOS_VERSION:
     50 		p = pmf_get_platform("bios-version");
     51 		break;
     52 	case DMI_BIOS_DATE:
     53 		p = pmf_get_platform("bios-date");
     54 		break;
     55 	case DMI_SYS_VENDOR:
     56 		p = pmf_get_platform("system-vendor");
     57 		break;
     58 	case DMI_PRODUCT_NAME:
     59 		p = pmf_get_platform("system-product");
     60 		break;
     61 	case DMI_PRODUCT_VERSION:
     62 		p = pmf_get_platform("system-version");
     63 		break;
     64 	case DMI_PRODUCT_SERIAL:
     65 		p = pmf_get_platform("system-serial");
     66 		break;
     67 	case DMI_PRODUCT_UUID:
     68 		p = pmf_get_platform("system-uuid");
     69 		break;
     70 	case DMI_BOARD_VENDOR:
     71 		p = pmf_get_platform("board-vendor");
     72 		break;
     73 	case DMI_BOARD_NAME:
     74 		p = pmf_get_platform("board-product");
     75 		break;
     76 	case DMI_BOARD_VERSION:
     77 		p = pmf_get_platform("board-version");
     78 		break;
     79 	case DMI_BOARD_SERIAL:
     80 		p = pmf_get_platform("board-serial");
     81 		break;
     82 	case DMI_BOARD_ASSET_TAG:
     83 		p = pmf_get_platform("board-asset-tag");
     84 		break;
     85 	case DMI_CHASSIS_VENDOR:
     86 	case DMI_CHASSIS_TYPE:
     87 	case DMI_CHASSIS_VERSION:
     88 	case DMI_CHASSIS_SERIAL:
     89 	case DMI_CHASSIS_ASSET_TAG:
     90 		return false;
     91 	case DMI_STRING_MAX:
     92 	default:
     93 		aprint_error("%s: unknown DMI field(%d)\n", __func__, slot);
     94 		return false;
     95 	}
     96 	if (p == NULL || strcmp(p, text))
     97 		return false;
     98 
     99 	return true;
    100 }
    101 
    102 static bool
    103 dmi_found(const struct dmi_system_id *dsi)
    104 {
    105 	int i;
    106 
    107 	for (i = 0; i < __arraycount(dsi->matches); i++) {
    108 		if (dsi->matches[i].slot == DMI_NONE)
    109 			break;
    110 		if (!dmi_match(dsi->matches[i].slot, dsi->matches[i].substr))
    111 			return false;
    112 	}
    113 	return true;
    114 }
    115 
    116 int
    117 dmi_check_system(const struct dmi_system_id *sysid)
    118 {
    119 	const struct dmi_system_id *dsi;
    120 	int num = 0;
    121 
    122 	for (dsi = sysid; dsi->matches[0].slot != DMI_NONE; dsi++) {
    123 		if (dmi_found(dsi)) {
    124 			num++;
    125 			if (dsi->callback && dsi->callback(dsi))
    126 				break;
    127 		}
    128 	}
    129 	return num;
    130 }
    131