block/opal_proto.h - arm/linux - Git at Google

 /*
  * Copyright © 2016 Intel Corporation
  *
  * Authors:
  *    Rafael Antognolli <rafael.antognolli@intel.com>
  *    Scott  Bauer      <scott.bauer@intel.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
  * version 2, as published by the Free Software Foundation.
  *
  * This program is distributed in the hope it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.
  */
 #include <linux/types.h>

 #ifndef _OPAL_PROTO_H
 #define _OPAL_PROTO_H

 /*
  * These constant values come from:
  * SPC-4 section
  * 6.30 SECURITY PROTOCOL IN command / table 265.
  */
 enum {
 	TCG_SECP_00 = 0,
 	TCG_SECP_01,
 };

 /*
  * Token defs derived from:
  * TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
  * 3.2.2 Data Stream Encoding
  */
 enum opal_response_token {
 	OPAL_DTA_TOKENID_BYTESTRING = 0xe0,
 	OPAL_DTA_TOKENID_SINT = 0xe1,
 	OPAL_DTA_TOKENID_UINT = 0xe2,
 	OPAL_DTA_TOKENID_TOKEN = 0xe3, /* actual token is returned */
 	OPAL_DTA_TOKENID_INVALID = 0X0
 };

 #define DTAERROR_NO_METHOD_STATUS 0x89
 #define GENERIC_HOST_SESSION_NUM 0x41

 #define TPER_SYNC_SUPPORTED 0x01
 #define MBR_ENABLED_MASK 0x10

 #define TINY_ATOM_DATA_MASK 0x3F
 #define TINY_ATOM_SIGNED 0x40

 #define SHORT_ATOM_ID 0x80
 #define SHORT_ATOM_BYTESTRING 0x20
 #define SHORT_ATOM_SIGNED 0x10
 #define SHORT_ATOM_LEN_MASK 0xF

 #define MEDIUM_ATOM_ID 0xC0
 #define MEDIUM_ATOM_BYTESTRING 0x10
 #define MEDIUM_ATOM_SIGNED 0x8
 #define MEDIUM_ATOM_LEN_MASK 0x7

 #define LONG_ATOM_ID 0xe0
 #define LONG_ATOM_BYTESTRING 0x2
 #define LONG_ATOM_SIGNED 0x1

 /* Derived from TCG Core spec 2.01 Section:
  * 3.2.2.1
  * Data Type
  */
 #define TINY_ATOM_BYTE   0x7F
 #define SHORT_ATOM_BYTE  0xBF
 #define MEDIUM_ATOM_BYTE 0xDF
 #define LONG_ATOM_BYTE   0xE3

 #define OPAL_INVAL_PARAM 12
 #define OPAL_MANUFACTURED_INACTIVE 0x08
 #define OPAL_DISCOVERY_COMID 0x0001

 #define LOCKING_RANGE_NON_GLOBAL 0x03
 /*
  * User IDs used in the TCG storage SSCs
  * Derived from: TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
  * Section: 6.3 Assigned UIDs
  */
 #define OPAL_UID_LENGTH 8
 #define OPAL_METHOD_LENGTH 8
 #define OPAL_MSID_KEYLEN 15
 #define OPAL_UID_LENGTH_HALF 4

 /* Enum to index OPALUID array */
 enum opal_uid {
 	/* users */
 	OPAL_SMUID_UID,
 	OPAL_THISSP_UID,
 	OPAL_ADMINSP_UID,
 	OPAL_LOCKINGSP_UID,
 	OPAL_ENTERPRISE_LOCKINGSP_UID,
 	OPAL_ANYBODY_UID,
 	OPAL_SID_UID,
 	OPAL_ADMIN1_UID,
 	OPAL_USER1_UID,
 	OPAL_USER2_UID,
 	OPAL_PSID_UID,
 	OPAL_ENTERPRISE_BANDMASTER0_UID,
 	OPAL_ENTERPRISE_ERASEMASTER_UID,
 	/* tables */
 	OPAL_LOCKINGRANGE_GLOBAL,
 	OPAL_LOCKINGRANGE_ACE_RDLOCKED,
 	OPAL_LOCKINGRANGE_ACE_WRLOCKED,
 	OPAL_MBRCONTROL,
 	OPAL_MBR,
 	OPAL_AUTHORITY_TABLE,
 	OPAL_C_PIN_TABLE,
 	OPAL_LOCKING_INFO_TABLE,
 	OPAL_ENTERPRISE_LOCKING_INFO_TABLE,
 	/* C_PIN_TABLE object ID's */
 	OPAL_C_PIN_MSID,
 	OPAL_C_PIN_SID,
 	OPAL_C_PIN_ADMIN1,
 	/* half UID's (only first 4 bytes used) */
 	OPAL_HALF_UID_AUTHORITY_OBJ_REF,
 	OPAL_HALF_UID_BOOLEAN_ACE,
 	/* omitted optional parameter */
 	OPAL_UID_HEXFF,
 };

 #define OPAL_METHOD_LENGTH 8

 /* Enum for indexing the OPALMETHOD array */
 enum opal_method {
 	OPAL_PROPERTIES,
 	OPAL_STARTSESSION,
 	OPAL_REVERT,
 	OPAL_ACTIVATE,
 	OPAL_EGET,
 	OPAL_ESET,
 	OPAL_NEXT,
 	OPAL_EAUTHENTICATE,
 	OPAL_GETACL,
 	OPAL_GENKEY,
 	OPAL_REVERTSP,
 	OPAL_GET,
 	OPAL_SET,
 	OPAL_AUTHENTICATE,
 	OPAL_RANDOM,
 	OPAL_ERASE,
 };

 enum opal_token {
 	/* Boolean */
 	OPAL_TRUE = 0x01,
 	OPAL_FALSE = 0x00,
 	OPAL_BOOLEAN_EXPR = 0x03,
 	/* cellblocks */
 	OPAL_TABLE = 0x00,
 	OPAL_STARTROW = 0x01,
 	OPAL_ENDROW = 0x02,
 	OPAL_STARTCOLUMN = 0x03,
 	OPAL_ENDCOLUMN = 0x04,
 	OPAL_VALUES = 0x01,
 	/* authority table */
 	OPAL_PIN = 0x03,
 	/* locking tokens */
 	OPAL_RANGESTART = 0x03,
 	OPAL_RANGELENGTH = 0x04,
 	OPAL_READLOCKENABLED = 0x05,
 	OPAL_WRITELOCKENABLED = 0x06,
 	OPAL_READLOCKED = 0x07,
 	OPAL_WRITELOCKED = 0x08,
 	OPAL_ACTIVEKEY = 0x0A,
 	/* locking info table */
 	OPAL_MAXRANGES = 0x04,
 	 /* mbr control */
 	OPAL_MBRENABLE = 0x01,
 	OPAL_MBRDONE = 0x02,
 	/* properties */
 	OPAL_HOSTPROPERTIES = 0x00,
 	/* atoms */
 	OPAL_STARTLIST = 0xf0,
 	OPAL_ENDLIST = 0xf1,
 	OPAL_STARTNAME = 0xf2,
 	OPAL_ENDNAME = 0xf3,
 	OPAL_CALL = 0xf8,
 	OPAL_ENDOFDATA = 0xf9,
 	OPAL_ENDOFSESSION = 0xfa,
 	OPAL_STARTTRANSACTON = 0xfb,
 	OPAL_ENDTRANSACTON = 0xfC,
 	OPAL_EMPTYATOM = 0xff,
 	OPAL_WHERE = 0x00,
 };

 /* Locking state for a locking range */
 enum opal_lockingstate {
 	OPAL_LOCKING_READWRITE = 0x01,
 	OPAL_LOCKING_READONLY = 0x02,
 	OPAL_LOCKING_LOCKED = 0x03,
 };

 /* Packets derived from:
  * TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
  * Secion: 3.2.3 ComPackets, Packets & Subpackets
  */

 /* Comm Packet (header) for transmissions. */
 struct opal_compacket {
 	__be32 reserved0;
 	u8 extendedComID[4];
 	__be32 outstandingData;
 	__be32 minTransfer;
 	__be32 length;
 };

 /* Packet structure. */
 struct opal_packet {
 	__be32 tsn;
 	__be32 hsn;
 	__be32 seq_number;
 	__be16 reserved0;
 	__be16 ack_type;
 	__be32 acknowledgment;
 	__be32 length;
 };

 /* Data sub packet header */
 struct opal_data_subpacket {
 	u8 reserved0[6];
 	__be16 kind;
 	__be32 length;
 };

 /* header of a response */
 struct opal_header {
 	struct opal_compacket cp;
 	struct opal_packet pkt;
 	struct opal_data_subpacket subpkt;
 };

 #define FC_TPER       0x0001
 #define FC_LOCKING    0x0002
 #define FC_GEOMETRY   0x0003
 #define FC_ENTERPRISE 0x0100
 #define FC_DATASTORE  0x0202
 #define FC_SINGLEUSER 0x0201
 #define FC_OPALV100   0x0200
 #define FC_OPALV200   0x0203

 /*
  * The Discovery 0 Header. As defined in
  * Opal SSC Documentation
  * Section: 3.3.5 Capability Discovery
  */
 struct d0_header {
 	__be32 length; /* the length of the header 48 in 2.00.100 */
 	__be32 revision; /**< revision of the header 1 in 2.00.100 */
 	__be32 reserved01;
 	__be32 reserved02;
 	/*
 	 * the remainder of the structure is vendor specific and will not be
 	 * addressed now
 	 */
 	u8 ignored[32];
 };

 /*
  * TPer Feature Descriptor. Contains flags indicating support for the
  * TPer features described in the OPAL specification. The names match the
  * OPAL terminology
  *
  * code == 0x001 in 2.00.100
  */
 struct d0_tper_features {
 	/*
 	 * supported_features bits:
 	 * bit 7: reserved
 	 * bit 6: com ID management
 	 * bit 5: reserved
 	 * bit 4: streaming support
 	 * bit 3: buffer management
 	 * bit 2: ACK/NACK
 	 * bit 1: async
 	 * bit 0: sync
 	 */
 	u8 supported_features;
 	/*
 	 * bytes 5 through 15 are reserved, but we represent the first 3 as
 	 * u8 to keep the other two 32bits integers aligned.
 	 */
 	u8 reserved01[3];
 	__be32 reserved02;
 	__be32 reserved03;
 };

 /*
  * Locking Feature Descriptor. Contains flags indicating support for the
  * locking features described in the OPAL specification. The names match the
  * OPAL terminology
  *
  * code == 0x0002 in 2.00.100
  */
 struct d0_locking_features {
 	/*
 	 * supported_features bits:
 	 * bits 6-7: reserved
 	 * bit 5: MBR done
 	 * bit 4: MBR enabled
 	 * bit 3: media encryption
 	 * bit 2: locked
 	 * bit 1: locking enabled
 	 * bit 0: locking supported
 	 */
 	u8 supported_features;
 	/*
 	 * bytes 5 through 15 are reserved, but we represent the first 3 as
 	 * u8 to keep the other two 32bits integers aligned.
 	 */
 	u8 reserved01[3];
 	__be32 reserved02;
 	__be32 reserved03;
 };

 /*
  * Geometry Feature Descriptor. Contains flags indicating support for the
  * geometry features described in the OPAL specification. The names match the
  * OPAL terminology
  *
  * code == 0x0003 in 2.00.100
  */
 struct d0_geometry_features {
 	/*
 	 * skip 32 bits from header, needed to align the struct to 64 bits.
 	 */
 	u8 header[4];
 	/*
 	 * reserved01:
 	 * bits 1-6: reserved
 	 * bit 0: align
 	 */
 	u8 reserved01;
 	u8 reserved02[7];
 	__be32 logical_block_size;
 	__be64 alignment_granularity;
 	__be64 lowest_aligned_lba;
 };

 /*
  * Enterprise SSC Feature
  *
  * code == 0x0100
  */
 struct d0_enterprise_ssc {
 	__be16 baseComID;
 	__be16 numComIDs;
 	/* range_crossing:
 	 * bits 1-6: reserved
 	 * bit 0: range crossing
 	 */
 	u8 range_crossing;
 	u8 reserved01;
 	__be16 reserved02;
 	__be32 reserved03;
 	__be32 reserved04;
 };

 /*
  * Opal V1 feature
  *
  * code == 0x0200
  */
 struct d0_opal_v100 {
 	__be16 baseComID;
 	__be16 numComIDs;
 };

 /*
  * Single User Mode feature
  *
  * code == 0x0201
  */
 struct d0_single_user_mode {
 	__be32 num_locking_objects;
 	/* reserved01:
 	 * bit 0: any
 	 * bit 1: all
 	 * bit 2: policy
 	 * bits 3-7: reserved
 	 */
 	u8 reserved01;
 	u8 reserved02;
 	__be16 reserved03;
 	__be32 reserved04;
 };

 /*
  * Additonal Datastores feature
  *
  * code == 0x0202
  */
 struct d0_datastore_table {
 	__be16 reserved01;
 	__be16 max_tables;
 	__be32 max_size_tables;
 	__be32 table_size_alignment;
 };

 /*
  * OPAL 2.0 feature
  *
  * code == 0x0203
  */
 struct d0_opal_v200 {
 	__be16 baseComID;
 	__be16 numComIDs;
 	/* range_crossing:
 	 * bits 1-6: reserved
 	 * bit 0: range crossing
 	 */
 	u8 range_crossing;
 	/* num_locking_admin_auth:
 	 * not aligned to 16 bits, so use two u8.
 	 * stored in big endian:
 	 * 0: MSB
 	 * 1: LSB
 	 */
 	u8 num_locking_admin_auth[2];
 	/* num_locking_user_auth:
 	 * not aligned to 16 bits, so use two u8.
 	 * stored in big endian:
 	 * 0: MSB
 	 * 1: LSB
 	 */
 	u8 num_locking_user_auth[2];
 	u8 initialPIN;
 	u8 revertedPIN;
 	u8 reserved01;
 	__be32 reserved02;
 };

 /* Union of features used to parse the discovery 0 response */
 struct d0_features {
 	__be16 code;
 	/*
 	 * r_version bits:
 	 * bits 4-7: version
 	 * bits 0-3: reserved
 	 */
 	u8 r_version;
 	u8 length;
 	u8 features[];
 };

 #endif /* _OPAL_PROTO_H */
	/*
	* Copyright © 2016 Intel Corporation
	*
	* Authors:
	* Rafael Antognolli <rafael.antognolli@intel.com>
	* Scott Bauer <scott.bauer@intel.com>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms and conditions of the GNU General Public License,
	* version 2, as published by the Free Software Foundation.
	*
	* This program is distributed in the hope it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	* more details.
	*/
	#include <linux/types.h>

	#ifndef _OPAL_PROTO_H
	#define _OPAL_PROTO_H

	/*
	* These constant values come from:
	* SPC-4 section
	* 6.30 SECURITY PROTOCOL IN command / table 265.
	*/
	enum {
	TCG_SECP_00 = 0,
	TCG_SECP_01,
	};

	/*
	* Token defs derived from:
	* TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
	* 3.2.2 Data Stream Encoding
	*/
	enum opal_response_token {
	OPAL_DTA_TOKENID_BYTESTRING = 0xe0,
	OPAL_DTA_TOKENID_SINT = 0xe1,
	OPAL_DTA_TOKENID_UINT = 0xe2,
	OPAL_DTA_TOKENID_TOKEN = 0xe3, /* actual token is returned */
	OPAL_DTA_TOKENID_INVALID = 0X0
	};

	#define DTAERROR_NO_METHOD_STATUS 0x89
	#define GENERIC_HOST_SESSION_NUM 0x41

	#define TPER_SYNC_SUPPORTED 0x01
	#define MBR_ENABLED_MASK 0x10

	#define TINY_ATOM_DATA_MASK 0x3F
	#define TINY_ATOM_SIGNED 0x40

	#define SHORT_ATOM_ID 0x80
	#define SHORT_ATOM_BYTESTRING 0x20
	#define SHORT_ATOM_SIGNED 0x10
	#define SHORT_ATOM_LEN_MASK 0xF

	#define MEDIUM_ATOM_ID 0xC0
	#define MEDIUM_ATOM_BYTESTRING 0x10
	#define MEDIUM_ATOM_SIGNED 0x8
	#define MEDIUM_ATOM_LEN_MASK 0x7

	#define LONG_ATOM_ID 0xe0
	#define LONG_ATOM_BYTESTRING 0x2
	#define LONG_ATOM_SIGNED 0x1

	/* Derived from TCG Core spec 2.01 Section:
	* 3.2.2.1
	* Data Type
	*/
	#define TINY_ATOM_BYTE 0x7F
	#define SHORT_ATOM_BYTE 0xBF
	#define MEDIUM_ATOM_BYTE 0xDF
	#define LONG_ATOM_BYTE 0xE3

	#define OPAL_INVAL_PARAM 12
	#define OPAL_MANUFACTURED_INACTIVE 0x08
	#define OPAL_DISCOVERY_COMID 0x0001

	#define LOCKING_RANGE_NON_GLOBAL 0x03
	/*
	* User IDs used in the TCG storage SSCs
	* Derived from: TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
	* Section: 6.3 Assigned UIDs
	*/
	#define OPAL_UID_LENGTH 8
	#define OPAL_METHOD_LENGTH 8
	#define OPAL_MSID_KEYLEN 15
	#define OPAL_UID_LENGTH_HALF 4

	/* Enum to index OPALUID array */
	enum opal_uid {
	/* users */
	OPAL_SMUID_UID,
	OPAL_THISSP_UID,
	OPAL_ADMINSP_UID,
	OPAL_LOCKINGSP_UID,
	OPAL_ENTERPRISE_LOCKINGSP_UID,
	OPAL_ANYBODY_UID,
	OPAL_SID_UID,
	OPAL_ADMIN1_UID,
	OPAL_USER1_UID,
	OPAL_USER2_UID,
	OPAL_PSID_UID,
	OPAL_ENTERPRISE_BANDMASTER0_UID,
	OPAL_ENTERPRISE_ERASEMASTER_UID,
	/* tables */
	OPAL_LOCKINGRANGE_GLOBAL,
	OPAL_LOCKINGRANGE_ACE_RDLOCKED,
	OPAL_LOCKINGRANGE_ACE_WRLOCKED,
	OPAL_MBRCONTROL,
	OPAL_MBR,
	OPAL_AUTHORITY_TABLE,
	OPAL_C_PIN_TABLE,
	OPAL_LOCKING_INFO_TABLE,
	OPAL_ENTERPRISE_LOCKING_INFO_TABLE,
	/* C_PIN_TABLE object ID's */
	OPAL_C_PIN_MSID,
	OPAL_C_PIN_SID,
	OPAL_C_PIN_ADMIN1,
	/* half UID's (only first 4 bytes used) */
	OPAL_HALF_UID_AUTHORITY_OBJ_REF,
	OPAL_HALF_UID_BOOLEAN_ACE,
	/* omitted optional parameter */
	OPAL_UID_HEXFF,
	};

	#define OPAL_METHOD_LENGTH 8

	/* Enum for indexing the OPALMETHOD array */
	enum opal_method {
	OPAL_PROPERTIES,
	OPAL_STARTSESSION,
	OPAL_REVERT,
	OPAL_ACTIVATE,
	OPAL_EGET,
	OPAL_ESET,
	OPAL_NEXT,
	OPAL_EAUTHENTICATE,
	OPAL_GETACL,
	OPAL_GENKEY,
	OPAL_REVERTSP,
	OPAL_GET,
	OPAL_SET,
	OPAL_AUTHENTICATE,
	OPAL_RANDOM,
	OPAL_ERASE,
	};

	enum opal_token {
	/* Boolean */
	OPAL_TRUE = 0x01,
	OPAL_FALSE = 0x00,
	OPAL_BOOLEAN_EXPR = 0x03,
	/* cellblocks */
	OPAL_TABLE = 0x00,
	OPAL_STARTROW = 0x01,
	OPAL_ENDROW = 0x02,
	OPAL_STARTCOLUMN = 0x03,
	OPAL_ENDCOLUMN = 0x04,
	OPAL_VALUES = 0x01,
	/* authority table */
	OPAL_PIN = 0x03,
	/* locking tokens */
	OPAL_RANGESTART = 0x03,
	OPAL_RANGELENGTH = 0x04,
	OPAL_READLOCKENABLED = 0x05,
	OPAL_WRITELOCKENABLED = 0x06,
	OPAL_READLOCKED = 0x07,
	OPAL_WRITELOCKED = 0x08,
	OPAL_ACTIVEKEY = 0x0A,
	/* locking info table */
	OPAL_MAXRANGES = 0x04,
	/* mbr control */
	OPAL_MBRENABLE = 0x01,
	OPAL_MBRDONE = 0x02,
	/* properties */
	OPAL_HOSTPROPERTIES = 0x00,
	/* atoms */
	OPAL_STARTLIST = 0xf0,
	OPAL_ENDLIST = 0xf1,
	OPAL_STARTNAME = 0xf2,
	OPAL_ENDNAME = 0xf3,
	OPAL_CALL = 0xf8,
	OPAL_ENDOFDATA = 0xf9,
	OPAL_ENDOFSESSION = 0xfa,
	OPAL_STARTTRANSACTON = 0xfb,
	OPAL_ENDTRANSACTON = 0xfC,
	OPAL_EMPTYATOM = 0xff,
	OPAL_WHERE = 0x00,
	};

	/* Locking state for a locking range */
	enum opal_lockingstate {
	OPAL_LOCKING_READWRITE = 0x01,
	OPAL_LOCKING_READONLY = 0x02,
	OPAL_LOCKING_LOCKED = 0x03,
	};

	/* Packets derived from:
	* TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
	* Secion: 3.2.3 ComPackets, Packets & Subpackets
	*/

	/* Comm Packet (header) for transmissions. */
	struct opal_compacket {
	__be32 reserved0;
	u8 extendedComID[4];
	__be32 outstandingData;
	__be32 minTransfer;
	__be32 length;
	};

	/* Packet structure. */
	struct opal_packet {
	__be32 tsn;
	__be32 hsn;
	__be32 seq_number;
	__be16 reserved0;
	__be16 ack_type;
	__be32 acknowledgment;
	__be32 length;
	};

	/* Data sub packet header */
	struct opal_data_subpacket {
	u8 reserved0[6];
	__be16 kind;
	__be32 length;
	};

	/* header of a response */
	struct opal_header {
	struct opal_compacket cp;
	struct opal_packet pkt;
	struct opal_data_subpacket subpkt;
	};

	#define FC_TPER 0x0001
	#define FC_LOCKING 0x0002
	#define FC_GEOMETRY 0x0003
	#define FC_ENTERPRISE 0x0100
	#define FC_DATASTORE 0x0202
	#define FC_SINGLEUSER 0x0201
	#define FC_OPALV100 0x0200
	#define FC_OPALV200 0x0203

	/*
	* The Discovery 0 Header. As defined in
	* Opal SSC Documentation
	* Section: 3.3.5 Capability Discovery
	*/
	struct d0_header {
	__be32 length; /* the length of the header 48 in 2.00.100 */
	__be32 revision; /*< revision of the header 1 in 2.00.100 /
	__be32 reserved01;
	__be32 reserved02;
	/*
	* the remainder of the structure is vendor specific and will not be
	* addressed now
	*/
	u8 ignored[32];
	};

	/*
	* TPer Feature Descriptor. Contains flags indicating support for the
	* TPer features described in the OPAL specification. The names match the
	* OPAL terminology
	*
	* code == 0x001 in 2.00.100
	*/
	struct d0_tper_features {
	/*
	* supported_features bits:
	* bit 7: reserved
	* bit 6: com ID management
	* bit 5: reserved
	* bit 4: streaming support
	* bit 3: buffer management
	* bit 2: ACK/NACK
	* bit 1: async
	* bit 0: sync
	*/
	u8 supported_features;
	/*
	* bytes 5 through 15 are reserved, but we represent the first 3 as
	* u8 to keep the other two 32bits integers aligned.
	*/
	u8 reserved01[3];
	__be32 reserved02;
	__be32 reserved03;
	};

	/*
	* Locking Feature Descriptor. Contains flags indicating support for the
	* locking features described in the OPAL specification. The names match the
	* OPAL terminology
	*
	* code == 0x0002 in 2.00.100
	*/
	struct d0_locking_features {
	/*
	* supported_features bits:
	* bits 6-7: reserved
	* bit 5: MBR done
	* bit 4: MBR enabled
	* bit 3: media encryption
	* bit 2: locked
	* bit 1: locking enabled
	* bit 0: locking supported
	*/
	u8 supported_features;
	/*
	* bytes 5 through 15 are reserved, but we represent the first 3 as
	* u8 to keep the other two 32bits integers aligned.
	*/
	u8 reserved01[3];
	__be32 reserved02;
	__be32 reserved03;
	};

	/*
	* Geometry Feature Descriptor. Contains flags indicating support for the
	* geometry features described in the OPAL specification. The names match the
	* OPAL terminology
	*
	* code == 0x0003 in 2.00.100
	*/
	struct d0_geometry_features {
	/*
	* skip 32 bits from header, needed to align the struct to 64 bits.
	*/
	u8 header[4];
	/*
	* reserved01:
	* bits 1-6: reserved
	* bit 0: align
	*/
	u8 reserved01;
	u8 reserved02[7];
	__be32 logical_block_size;
	__be64 alignment_granularity;
	__be64 lowest_aligned_lba;
	};

	/*
	* Enterprise SSC Feature
	*
	* code == 0x0100
	*/
	struct d0_enterprise_ssc {
	__be16 baseComID;
	__be16 numComIDs;
	/* range_crossing:
	* bits 1-6: reserved
	* bit 0: range crossing
	*/
	u8 range_crossing;
	u8 reserved01;
	__be16 reserved02;
	__be32 reserved03;
	__be32 reserved04;
	};

	/*
	* Opal V1 feature
	*
	* code == 0x0200
	*/
	struct d0_opal_v100 {
	__be16 baseComID;
	__be16 numComIDs;
	};

	/*
	* Single User Mode feature
	*
	* code == 0x0201
	*/
	struct d0_single_user_mode {
	__be32 num_locking_objects;
	/* reserved01:
	* bit 0: any
	* bit 1: all
	* bit 2: policy
	* bits 3-7: reserved
	*/
	u8 reserved01;
	u8 reserved02;
	__be16 reserved03;
	__be32 reserved04;
	};

	/*
	* Additonal Datastores feature
	*
	* code == 0x0202
	*/
	struct d0_datastore_table {
	__be16 reserved01;
	__be16 max_tables;
	__be32 max_size_tables;
	__be32 table_size_alignment;
	};

	/*
	* OPAL 2.0 feature
	*
	* code == 0x0203
	*/
	struct d0_opal_v200 {
	__be16 baseComID;
	__be16 numComIDs;
	/* range_crossing:
	* bits 1-6: reserved
	* bit 0: range crossing
	*/
	u8 range_crossing;
	/* num_locking_admin_auth:
	* not aligned to 16 bits, so use two u8.
	* stored in big endian:
	* 0: MSB
	* 1: LSB
	*/
	u8 num_locking_admin_auth[2];
	/* num_locking_user_auth:
	* not aligned to 16 bits, so use two u8.
	* stored in big endian:
	* 0: MSB
	* 1: LSB
	*/
	u8 num_locking_user_auth[2];
	u8 initialPIN;
	u8 revertedPIN;
	u8 reserved01;
	__be32 reserved02;
	};

	/* Union of features used to parse the discovery 0 response */
	struct d0_features {
	__be16 code;
	/*
	* r_version bits:
	* bits 4-7: version
	* bits 0-3: reserved
	*/
	u8 r_version;
	u8 length;
	u8 features[];
	};

	#endif /* _OPAL_PROTO_H */