/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
/*
 *  User API methods for ACPI-WMI mapping driver
 *
 *  Copyright (C) 2017 Dell, Inc.
 */
#ifndef _UAPI_LINUX_WMI_H
#define _UAPI_LINUX_WMI_H

#include <linux/ioctl.h>
#include <linux/types.h>

/* WMI bus will filter all WMI vendor driver requests through this IOC */
#define WMI_IOC 'W'

/* All ioctl requests through WMI should declare their size followed by
 * relevant data objects
 */
struct wmi_ioctl_buffer {
        __u64   length;
        __u8    data[];
};

/* This structure may be modified by the firmware when we enter
 * system management mode through SMM, hence the volatiles
 */
struct calling_interface_buffer {
        __u16 cmd_class;
        __u16 cmd_select;
        volatile __u32 input[4];
        volatile __u32 output[4];
} __packed;

struct dell_wmi_extensions {
        __u32 argattrib;
        __u32 blength;
        __u8 data[];
} __packed;

struct dell_wmi_smbios_buffer {
        __u64 length;
        struct calling_interface_buffer std;
        struct dell_wmi_extensions      ext;
} __packed;

/* Whitelisted smbios class/select commands */
#define CLASS_TOKEN_READ        0
#define CLASS_TOKEN_WRITE       1
#define SELECT_TOKEN_STD        0
#define SELECT_TOKEN_BAT        1
#define SELECT_TOKEN_AC         2
#define CLASS_FLASH_INTERFACE   7
#define SELECT_FLASH_INTERFACE  3
#define CLASS_ADMIN_PROP        10
#define SELECT_ADMIN_PROP       3
#define CLASS_INFO              17
#define SELECT_RFKILL           11
#define SELECT_APP_REGISTRATION 3
#define SELECT_DOCK             22

/* whitelisted tokens */
#define CAPSULE_EN_TOKEN        0x0461
#define CAPSULE_DIS_TOKEN       0x0462
#define WSMT_EN_TOKEN           0x04EC
#define WSMT_DIS_TOKEN          0x04ED

/* Dell SMBIOS calling IOCTL command used by dell-smbios-wmi */
#define DELL_WMI_SMBIOS_CMD     _IOWR(WMI_IOC, 0, struct dell_wmi_smbios_buffer)

#endif