forked from mirrors/linux
db2d6038c5
If the dev is known (e.g. a devm-based sys_off_handler is used), it can be passed to the handler's callback to have it available there. Otherwise, cb_data might be set to the dev in most of the cases. Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> Signed-off-by: Benjamin Bara <benjamin.bara@skidata.com> Link: https://lore.kernel.org/r/20230327-tegra-pmic-reboot-v7-3-18699d5dcd76@skidata.com Signed-off-by: Lee Jones <lee@kernel.org>
189 lines
4.6 KiB
C
189 lines
4.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_REBOOT_H
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#define _LINUX_REBOOT_H
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#include <linux/notifier.h>
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#include <uapi/linux/reboot.h>
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struct device;
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struct sys_off_handler;
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#define SYS_DOWN 0x0001 /* Notify of system down */
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#define SYS_RESTART SYS_DOWN
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#define SYS_HALT 0x0002 /* Notify of system halt */
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#define SYS_POWER_OFF 0x0003 /* Notify of system power off */
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enum reboot_mode {
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REBOOT_UNDEFINED = -1,
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REBOOT_COLD = 0,
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REBOOT_WARM,
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REBOOT_HARD,
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REBOOT_SOFT,
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REBOOT_GPIO,
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};
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extern enum reboot_mode reboot_mode;
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extern enum reboot_mode panic_reboot_mode;
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enum reboot_type {
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BOOT_TRIPLE = 't',
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BOOT_KBD = 'k',
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BOOT_BIOS = 'b',
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BOOT_ACPI = 'a',
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BOOT_EFI = 'e',
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BOOT_CF9_FORCE = 'p',
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BOOT_CF9_SAFE = 'q',
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};
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extern enum reboot_type reboot_type;
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extern int reboot_default;
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extern int reboot_cpu;
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extern int reboot_force;
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extern int register_reboot_notifier(struct notifier_block *);
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extern int unregister_reboot_notifier(struct notifier_block *);
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extern int devm_register_reboot_notifier(struct device *, struct notifier_block *);
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extern int register_restart_handler(struct notifier_block *);
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extern int unregister_restart_handler(struct notifier_block *);
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extern void do_kernel_restart(char *cmd);
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/*
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* Architecture-specific implementations of sys_reboot commands.
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*/
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extern void migrate_to_reboot_cpu(void);
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extern void machine_restart(char *cmd);
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extern void machine_halt(void);
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extern void machine_power_off(void);
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extern void machine_shutdown(void);
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struct pt_regs;
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extern void machine_crash_shutdown(struct pt_regs *);
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void do_kernel_power_off(void);
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/*
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* sys-off handler API.
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*/
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/*
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* Standard sys-off priority levels. Users are expected to set priorities
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* relative to the standard levels.
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*
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* SYS_OFF_PRIO_PLATFORM: Use this for platform-level handlers.
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*
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* SYS_OFF_PRIO_LOW: Use this for handler of last resort.
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*
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* SYS_OFF_PRIO_DEFAULT: Use this for normal handlers.
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*
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* SYS_OFF_PRIO_HIGH: Use this for higher priority handlers.
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*
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* SYS_OFF_PRIO_FIRMWARE: Use this if handler uses firmware call.
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*/
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#define SYS_OFF_PRIO_PLATFORM -256
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#define SYS_OFF_PRIO_LOW -128
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#define SYS_OFF_PRIO_DEFAULT 0
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#define SYS_OFF_PRIO_HIGH 192
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#define SYS_OFF_PRIO_FIRMWARE 224
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enum sys_off_mode {
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/**
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* @SYS_OFF_MODE_POWER_OFF_PREPARE:
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*
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* Handlers prepare system to be powered off. Handlers are
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* allowed to sleep.
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*/
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SYS_OFF_MODE_POWER_OFF_PREPARE,
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/**
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* @SYS_OFF_MODE_POWER_OFF:
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*
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* Handlers power-off system. Handlers are disallowed to sleep.
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*/
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SYS_OFF_MODE_POWER_OFF,
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/**
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* @SYS_OFF_MODE_RESTART_PREPARE:
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*
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* Handlers prepare system to be restarted. Handlers are
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* allowed to sleep.
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*/
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SYS_OFF_MODE_RESTART_PREPARE,
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/**
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* @SYS_OFF_MODE_RESTART:
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*
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* Handlers restart system. Handlers are disallowed to sleep.
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*/
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SYS_OFF_MODE_RESTART,
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};
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/**
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* struct sys_off_data - sys-off callback argument
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*
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* @mode: Mode ID. Currently used only by the sys-off restart mode,
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* see enum reboot_mode for the available modes.
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* @cb_data: User's callback data.
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* @cmd: Command string. Currently used only by the sys-off restart mode,
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* NULL otherwise.
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* @dev: Device of the sys-off handler. Only if known (devm_register_*),
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* NULL otherwise.
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*/
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struct sys_off_data {
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int mode;
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void *cb_data;
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const char *cmd;
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struct device *dev;
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};
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struct sys_off_handler *
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register_sys_off_handler(enum sys_off_mode mode,
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int priority,
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int (*callback)(struct sys_off_data *data),
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void *cb_data);
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void unregister_sys_off_handler(struct sys_off_handler *handler);
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int devm_register_sys_off_handler(struct device *dev,
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enum sys_off_mode mode,
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int priority,
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int (*callback)(struct sys_off_data *data),
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void *cb_data);
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int devm_register_power_off_handler(struct device *dev,
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int (*callback)(struct sys_off_data *data),
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void *cb_data);
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int devm_register_restart_handler(struct device *dev,
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int (*callback)(struct sys_off_data *data),
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void *cb_data);
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int register_platform_power_off(void (*power_off)(void));
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void unregister_platform_power_off(void (*power_off)(void));
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/*
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* Architecture independent implemenations of sys_reboot commands.
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*/
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extern void kernel_restart_prepare(char *cmd);
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extern void kernel_restart(char *cmd);
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extern void kernel_halt(void);
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extern void kernel_power_off(void);
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extern bool kernel_can_power_off(void);
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void ctrl_alt_del(void);
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extern void orderly_poweroff(bool force);
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extern void orderly_reboot(void);
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void hw_protection_shutdown(const char *reason, int ms_until_forced);
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/*
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* Emergency restart, callable from an interrupt handler.
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*/
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extern void emergency_restart(void);
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#include <asm/emergency-restart.h>
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#endif /* _LINUX_REBOOT_H */
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