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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Copyright © 2016 Intel Corporation
 *
 * Authors:
 *    Rafael Antognolli <rafael.antognolli@intel.com>
 *    Scott  Bauer      <scott.bauer@intel.com>
 */

#ifndef _SED_OPAL_H
#define _SED_OPAL_H

#include <linux/types.h>

#define OPAL_KEY_MAX 256
#define OPAL_MAX_LRS 9

enum opal_mbr {
	OPAL_MBR_ENABLE = 0x0,
	OPAL_MBR_DISABLE = 0x01,
};

enum opal_mbr_done_flag {
	OPAL_MBR_NOT_DONE = 0x0,
	OPAL_MBR_DONE = 0x01
};

enum opal_user {
	OPAL_ADMIN1 = 0x0,
	OPAL_USER1 = 0x01,
	OPAL_USER2 = 0x02,
	OPAL_USER3 = 0x03,
	OPAL_USER4 = 0x04,
	OPAL_USER5 = 0x05,
	OPAL_USER6 = 0x06,
	OPAL_USER7 = 0x07,
	OPAL_USER8 = 0x08,
	OPAL_USER9 = 0x09,
};

enum opal_lock_state {
	OPAL_RO = 0x01, /* 0001 */
	OPAL_RW = 0x02, /* 0010 */
	OPAL_LK = 0x04, /* 0100 */
};

enum opal_lock_flags {
	/* IOC_OPAL_SAVE will also store the provided key for locking */
	OPAL_SAVE_FOR_LOCK = 0x01,
};

struct opal_key {
	__u8 lr;
	__u8 key_len;
	__u8 __align[6];
	__u8 key[OPAL_KEY_MAX];
};

struct opal_lr_act {
	struct opal_key key;
	__u32 sum;
	__u8 num_lrs;
	__u8 lr[OPAL_MAX_LRS];
	__u8 align[2]; /* Align to 8 byte boundary */
};

struct opal_session_info {
	__u32 sum;
	__u32 who;
	struct opal_key opal_key;
};

struct opal_user_lr_setup {
	__u64 range_start;
	__u64 range_length;
	__u32 RLE; /* Read Lock enabled */
	__u32 WLE; /* Write Lock Enabled */
	struct opal_session_info session;
};

struct opal_lr_status {
	struct opal_session_info session;
	__u64 range_start;
	__u64 range_length;
	__u32 RLE; /* Read Lock enabled */
	__u32 WLE; /* Write Lock Enabled */
	__u32 l_state;
	__u8  align[4];
};

struct opal_lock_unlock {
	struct opal_session_info session;
	__u32 l_state;
	__u16 flags;
	__u8 __align[2];
};

struct opal_new_pw {
	struct opal_session_info session;

	/* When we're not operating in sum, and we first set
	 * passwords we need to set them via ADMIN authority.
	 * After passwords are changed, we can set them via,
	 * User authorities.
	 * Because of this restriction we need to know about
	 * Two different users. One in 'session' which we will use
	 * to start the session and new_userr_pw as the user we're
	 * chaning the pw for.
	 */
	struct opal_session_info new_user_pw;
};

struct opal_mbr_data {
	struct opal_key key;
	__u8 enable_disable;
	__u8 __align[7];
};

struct opal_mbr_done {
	struct opal_key key;
	__u8 done_flag;
	__u8 __align[7];
};

struct opal_shadow_mbr {
	struct opal_key key;
	const __u64 data;
	__u64 offset;
	__u64 size;
};

/* Opal table operations */
enum opal_table_ops {
	OPAL_READ_TABLE,
	OPAL_WRITE_TABLE,
};

#define OPAL_UID_LENGTH 8
struct opal_read_write_table {
	struct opal_key key;
	const __u64 data;
	const __u8 table_uid[OPAL_UID_LENGTH];
	__u64 offset;
	__u64 size;
#define OPAL_TABLE_READ (1 << OPAL_READ_TABLE)
#define OPAL_TABLE_WRITE (1 << OPAL_WRITE_TABLE)
	__u64 flags;
	__u64 priv;
};

#define OPAL_FL_SUPPORTED		0x00000001
#define OPAL_FL_LOCKING_SUPPORTED	0x00000002
#define OPAL_FL_LOCKING_ENABLED		0x00000004
#define OPAL_FL_LOCKED			0x00000008
#define OPAL_FL_MBR_ENABLED		0x00000010
#define OPAL_FL_MBR_DONE		0x00000020
#define OPAL_FL_SUM_SUPPORTED		0x00000040

struct opal_status {
	__u32 flags;
	__u32 reserved;
};

/*
 * Geometry Reporting per TCG Storage OPAL SSC
 * section 3.1.1.4
 */
struct opal_geometry {
	__u8 align;
	__u32 logical_block_size;
	__u64 alignment_granularity;
	__u64 lowest_aligned_lba;
	__u8  __align[3];
};

#define IOC_OPAL_SAVE		    _IOW('p', 220, struct opal_lock_unlock)
#define IOC_OPAL_LOCK_UNLOCK	    _IOW('p', 221, struct opal_lock_unlock)
#define IOC_OPAL_TAKE_OWNERSHIP	    _IOW('p', 222, struct opal_key)
#define IOC_OPAL_ACTIVATE_LSP       _IOW('p', 223, struct opal_lr_act)
#define IOC_OPAL_SET_PW             _IOW('p', 224, struct opal_new_pw)
#define IOC_OPAL_ACTIVATE_USR       _IOW('p', 225, struct opal_session_info)
#define IOC_OPAL_REVERT_TPR         _IOW('p', 226, struct opal_key)
#define IOC_OPAL_LR_SETUP           _IOW('p', 227, struct opal_user_lr_setup)
#define IOC_OPAL_ADD_USR_TO_LR      _IOW('p', 228, struct opal_lock_unlock)
#define IOC_OPAL_ENABLE_DISABLE_MBR _IOW('p', 229, struct opal_mbr_data)
#define IOC_OPAL_ERASE_LR           _IOW('p', 230, struct opal_session_info)
#define IOC_OPAL_SECURE_ERASE_LR    _IOW('p', 231, struct opal_session_info)
#define IOC_OPAL_PSID_REVERT_TPR    _IOW('p', 232, struct opal_key)
#define IOC_OPAL_MBR_DONE           _IOW('p', 233, struct opal_mbr_done)
#define IOC_OPAL_WRITE_SHADOW_MBR   _IOW('p', 234, struct opal_shadow_mbr)
#define IOC_OPAL_GENERIC_TABLE_RW   _IOW('p', 235, struct opal_read_write_table)
#define IOC_OPAL_GET_STATUS         _IOR('p', 236, struct opal_status)
#define IOC_OPAL_GET_LR_STATUS      _IOW('p', 237, struct opal_lr_status)
#define IOC_OPAL_GET_GEOMETRY       _IOR('p', 238, struct opal_geometry)

#endif /* _SED_OPAL_H */