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da1f607ed6
WSMT is as an attestation to the OS that the platform won't modify memory outside of pre-defined areas. If a platform has WSMT enabled in BIOS setup, SMM calls through dcdbas will fail. The only way to access platform data in these instances is through the WMI SMBIOS calling interface. Signed-off-by: Mario Limonciello <mario.limonciello@dell.com> Reviewed-by: Edward O'Callaghan <quasisec@google.com> Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/*
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* Common functions for kernel modules using Dell SMBIOS
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*
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* Copyright (c) Red Hat <mjg@redhat.com>
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* Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
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* Copyright (c) 2014 Pali Rohár <pali.rohar@gmail.com>
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*
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* Based on documentation in the libsmbios package:
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* Copyright (C) 2005-2014 Dell Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _DELL_SMBIOS_H_
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#define _DELL_SMBIOS_H_
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#include <linux/device.h>
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/* Classes and selects used in kernel drivers */
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#define CLASS_TOKEN_READ 0
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#define CLASS_TOKEN_WRITE 1
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#define SELECT_TOKEN_STD 0
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#define SELECT_TOKEN_BAT 1
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#define SELECT_TOKEN_AC 2
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#define CLASS_KBD_BACKLIGHT 4
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#define SELECT_KBD_BACKLIGHT 11
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#define CLASS_INFO 17
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#define SELECT_RFKILL 11
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#define SELECT_APP_REGISTRATION 3
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/* Tokens used in kernel drivers, any of these
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* should be filtered from userspace access
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*/
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#define BRIGHTNESS_TOKEN 0x007d
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#define KBD_LED_AC_TOKEN 0x0451
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#define KBD_LED_OFF_TOKEN 0x01E1
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#define KBD_LED_ON_TOKEN 0x01E2
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#define KBD_LED_AUTO_TOKEN 0x01E3
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#define KBD_LED_AUTO_25_TOKEN 0x02EA
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#define KBD_LED_AUTO_50_TOKEN 0x02EB
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#define KBD_LED_AUTO_75_TOKEN 0x02EC
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#define KBD_LED_AUTO_100_TOKEN 0x02F6
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#define GLOBAL_MIC_MUTE_ENABLE 0x0364
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#define GLOBAL_MIC_MUTE_DISABLE 0x0365
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#define WSMT_EN_TOKEN 0x04EC
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#define WSMT_DIS_TOKEN 0x04ED
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struct notifier_block;
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/* This structure will be modified by the firmware when we enter
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* system management mode, hence the volatiles */
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struct calling_interface_buffer {
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u16 cmd_class;
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u16 cmd_select;
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volatile u32 input[4];
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volatile u32 output[4];
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} __packed;
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struct calling_interface_token {
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u16 tokenID;
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u16 location;
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union {
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u16 value;
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u16 stringlength;
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};
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};
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struct calling_interface_structure {
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struct dmi_header header;
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u16 cmdIOAddress;
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u8 cmdIOCode;
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u32 supportedCmds;
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struct calling_interface_token tokens[];
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} __packed;
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int dell_smbios_register_device(struct device *d, void *call_fn);
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void dell_smbios_unregister_device(struct device *d);
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int dell_smbios_error(int value);
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int dell_smbios_call(struct calling_interface_buffer *buffer);
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struct calling_interface_token *dell_smbios_find_token(int tokenid);
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enum dell_laptop_notifier_actions {
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DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED,
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};
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int dell_laptop_register_notifier(struct notifier_block *nb);
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int dell_laptop_unregister_notifier(struct notifier_block *nb);
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void dell_laptop_call_notifier(unsigned long action, void *data);
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#endif
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