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 ť    /* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_ONCE_LITE_H
#define _LINUX_ONCE_LITE_H

#include <linux/types.h>

/* Call a function once. Similar to DO_ONCE(), but does not use jump label
 * patching via static keys.
 */
#define DO_ONCE_LITE(func, ...)						\
	DO_ONCE_LITE_IF(true, func, ##__VA_ARGS__)

#define __ONCE_LITE_IF(condition)					\
	({								\
		static bool __section(".data.once") __already_done;	\
		bool __ret_cond = !!(condition);			\
		bool __ret_once = false;				\
									\
		if (unlikely(__ret_cond && !__already_done)) {		\
			__already_done = true;				\
			__ret_once = true;				\
		}							\
		unlikely(__ret_once);					\
	})

#define DO_ONCE_LITE_IF(condition, func, ...)				\
	({								\
		bool __ret_do_once = !!(condition);			\
									\
		if (__ONCE_LITE_IF(__ret_do_once))			\
			func(__VA_ARGS__);				\
									\
		unlikely(__ret_do_once);				\
	})

#endif /* _LINUX_ONCE_LITE_H */
     /* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Enclosure Services
 *
 * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
 *
**-----------------------------------------------------------------------------
**
**
**-----------------------------------------------------------------------------
*/
#ifndef _LINUX_ENCLOSURE_H_
#define _LINUX_ENCLOSURE_H_

#include <linux/device.h>
#include <linux/list.h>

/* A few generic types ... taken from ses-2 */
enum enclosure_component_type {
	ENCLOSURE_COMPONENT_DEVICE = 0x01,
	ENCLOSURE_COMPONENT_CONTROLLER_ELECTRONICS = 0x07,
	ENCLOSURE_COMPONENT_SCSI_TARGET_PORT = 0x14,
	ENCLOSURE_COMPONENT_SCSI_INITIATOR_PORT = 0x15,
	ENCLOSURE_COMPONENT_ARRAY_DEVICE = 0x17,
	ENCLOSURE_COMPONENT_SAS_EXPANDER = 0x18,
};

/* ses-2 common element status */
enum enclosure_status {
	ENCLOSURE_STATUS_UNSUPPORTED = 0,
	ENCLOSURE_STATUS_OK,
	ENCLOSURE_STATUS_CRITICAL,
	ENCLOSURE_STATUS_NON_CRITICAL,
	ENCLOSURE_STATUS_UNRECOVERABLE,
	ENCLOSURE_STATUS_NOT_INSTALLED,
	ENCLOSURE_STATUS_UNKNOWN,
	ENCLOSURE_STATUS_UNAVAILABLE,
	/* last element for counting purposes */
	ENCLOSURE_STATUS_MAX
};

/* SFF-8485 activity light settings */
enum enclosure_component_setting {
	ENCLOSURE_SETTING_DISABLED = 0,
	ENCLOSURE_SETTING_ENABLED = 1,
	ENCLOSURE_SETTING_BLINK_A_ON_OFF = 2,
	ENCLOSURE_SETTING_BLINK_A_OFF_ON = 3,
	ENCLOSURE_SETTING_BLINK_B_ON_OFF = 6,
	ENCLOSURE_SETTING_BLINK_B_OFF_ON = 7,
};

struct enclosure_device;
struct enclosure_component;
struct enclosure_component_callbacks {
	void (*get_status)(struct enclosure_device *,
			     struct enclosure_component *);
	int (*set_status)(struct enclosure_device *,
			  struct enclosure_component *,
			  enum enclosure_status);
	void (*get_fault)(struct enclosure_device *,
			  struct enclosure_component *);
	int (*set_fault)(struct enclosure_device *,
			 struct enclosure_component *,
			 enum enclosure_component_setting);
	void (*get_active)(struct enclosure_device *,
			   struct enclosure_component *);
	int (*set_active)(struct enclosure_device *,
			  struct enclosure_component *,
			  enum enclosure_component_setting);
	void (*get_locate)(struct enclosure_device *,
			   struct enclosure_component *);
	int (*set_locate)(struct enclosure_device *,
			  struct enclosure_component *,
			  enum enclosure_component_setting);
	void (*get_power_status)(struct enclosure_device *,
				 struct enclosure_component *);
	int (*set_power_status)(struct enclosure_device *,
				struct enclosure_component *,
				int);
	int (*show_id)(struct enclosure_device *, char *buf);
};


struct enclosure_component {
	void *scratch;
	struct device cdev;
	struct device *dev;
	enum enclosure_component_type type;
	int number;
	int fault;
	int active;
	int locate;
	int slot;
	enum enclosure_status status;
	int power_status;
};

struct enclosure_device {
	void *scratch;
	struct list_head node;
	struct device edev;
	struct enclosure_component_callbacks *cb;
	int components;
	struct enclosure_component component[];
};

static inline struct enclosure_device *
to_enclosure_device(struct device *dev)
{
	return container_of(dev, struct enclosure