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mirror_edk2/MdeModulePkg/Universal/Network/IScsiDxe/IScsiProto.h

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/** @file
The header file of IScsi Protocol that defines many specific data structures.
Copyright (c) 2004 - 2008, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
IScsiProto.h
Abstract:
Protocol definitions for IScsi driver, mainly from RFC3720.
**/
#ifndef _ISCSI_PROTO_H_
#define _ISCSI_PROTO_H_
#include <Protocol/ScsiPassThruExt.h>
//
// RFC 1982 Serial Number Arithmetic, SERIAL_BITS = 32
//
#define ISCSI_SEQ_EQ(s1, s2) ((s1) == (s2))
#define ISCSI_SEQ_LT(s1, s2) \
( \
(((INT32) (s1) < (INT32) (s2)) && (s2 - s1) < ((UINT32) 1 << 31)) || \
(((INT32) (s1) > (INT32) (s2)) && (s1 - s2) > ((UINT32) 1 << 31)) \
)
#define ISCSI_SEQ_GT(s1, s2) \
( \
(((INT32) (s1) < (INT32) (s2)) && (s2 - s1) > ((UINT32) 1 << 31)) || \
(((INT32) (s1) > (INT32) (s2)) && (s1 - s2) < ((UINT32) 1 << 31)) \
)
#define ISCSI_WELL_KNOWN_PORT 3260
#define ISCSI_MAX_CONNS_PER_SESSION 1
#define DEFAULT_MAX_RECV_DATA_SEG_LEN 8192
#define MAX_RECV_DATA_SEG_LEN_IN_FFP 65536
#define DEFAULT_MAX_OUTSTANDING_R2T 1
#define ISCSI_VERSION_MAX 0x00
#define ISCSI_VERSION_MIN 0x00
#define ISID_BYTE_0 0 // OUI format
#define ISID_BYTE_1 0
#define ISID_BYTE_2 0xaa
#define ISID_BYTE_3 0x1
#define ISCSI_KEY_AUTH_METHOD "AuthMethod"
#define ISCSI_KEY_HEADER_DIGEST "HeaderDigest"
#define ISCSI_KEY_DATA_DIGEST "DataDigest"
#define ISCSI_KEY_MAX_CONNECTIONS "MaxConnections"
#define ISCSI_KEY_TARGET_NAME "TargetName"
#define ISCSI_KEY_INITIATOR_NAME "InitiatorName"
#define ISCSI_KEY_TARGET_ALIAS "TargetAlias"
#define ISCSI_KEY_INITIATOR_ALIAS "InitiatorAlias"
#define ISCSI_KEY_TARGET_ADDRESS "TargetAddress"
#define ISCSI_KEY_INITIAL_R2T "InitialR2T"
#define ISCSI_KEY_IMMEDIATE_DATA "ImmediateData"
#define ISCSI_KEY_TARGET_PORTAL_GROUP_TAG "TargetPortalGroupTag"
#define ISCSI_KEY_MAX_BURST_LENGTH "MaxBurstLength"
#define ISCSI_KEY_FIRST_BURST_LENGTH "FirstBurstLength"
#define ISCSI_KEY_DEFAULT_TIME2WAIT "DefaultTime2Wait"
#define ISCSI_KEY_DEFAULT_TIME2RETAIN "DefaultTime2Retain"
#define ISCSI_KEY_MAX_OUTSTANDING_R2T "MaxOutstandingR2T"
#define ISCSI_KEY_DATA_PDU_IN_ORDER "DataPDUInOrder"
#define ISCSI_KEY_DATA_SEQUENCE_IN_ORDER "DataSequenceInOrder"
#define ISCSI_KEY_ERROR_RECOVERY_LEVEL "ErrorRecoveryLevel"
#define ISCSI_KEY_SESSION_TYPE "SessionType"
#define ISCSI_KEY_MAX_RECV_DATA_SEGMENT_LENGTH "MaxRecvDataSegmentLength"
#define ISCSI_KEY_VALUE_NONE "None"
//
// connection state for initiator
//
typedef enum {
CONN_STATE_FREE,
CONN_STATE_XPT_WAIT,
CONN_STATE_IN_LOGIN,
CONN_STATE_LOGGED_IN,
CONN_STATE_IN_LOGOUT,
CONN_STATE_LOGOUT_REQUESTED,
CONN_STATE_CLEANUP_WAIT,
CONN_STATE_IN_CLEANUP
} CONNECTION_STATE;
//
// session state for initiator
//
typedef enum {
SESSION_STATE_FREE,
SESSION_STATE_LOGGED_IN,
SESSION_STATE_FAILED
} SESSION_STATE;
typedef enum {
DataIn = 0,
DataOut = 1,
DataBi = 2
} DATA_DIRECTION;
#define ISCSI_RESERVED_TAG 0xffffffff
#define ISCSI_REQ_IMMEDIATE 0x40
#define ISCSI_OPCODE_MASK 0x3F
#define ISCSI_SET_OPCODE(PduHdr, Op, Flgs) ((((ISCSI_BASIC_HEADER *) (PduHdr))->OpCode) = ((Op) | (Flgs)))
#define ISCSI_GET_OPCODE(PduHdr) ((((ISCSI_BASIC_HEADER *) (PduHdr))->OpCode) & ISCSI_OPCODE_MASK)
#define ISCSI_CHECK_OPCODE(PduHdr, Op) ((((PduHdr)->OpCode) & ISCSI_OPCODE_MASK) == (Op))
#define ISCSI_IMMEDIATE_ON(PduHdr) ((PduHdr)->OpCode & ISCSI_REQ_IMMEDIATE)
#define ISCSI_SET_FLAG(PduHdr, Flag) (((ISCSI_BASIC_HEADER *) (PduHdr))->Flags |= (BOOLEAN)(Flag))
#define ISCSI_CLEAR_FLAG(PduHdr, Flag) (((ISCSI_BASIC_HEADER *) (PduHdr))->Flags &= ~(Flag))
#define ISCSI_FLAG_ON(PduHdr, Flag) ((((ISCSI_BASIC_HEADER *) (PduHdr))->Flags & (Flag)) == (Flag))
#define ISCSI_SET_STAGES(PduHdr, Cur, Nxt) ((PduHdr)->Flags = (UINT8) ((PduHdr)->Flags | ((Cur) << 2 | (Nxt))))
#define ISCSI_GET_CURRENT_STAGE(PduHdr) (((PduHdr)->Flags >> 2) & 0x3)
#define ISCSI_GET_NEXT_STAGE(PduHdr) (((PduHdr)->Flags) & 0x3)
#define ISCSI_GET_PAD_LEN(DataLen) ((~(DataLen) + 1) & 0x3)
#define ISCSI_ROUNDUP(DataLen) (((DataLen) + 3) &~(0x3))
#define HTON24(Dst, Src) \
do { \
(Dst)[0] = (UINT8) (((Src) >> 16) & 0xFF); \
(Dst)[1] = (UINT8) (((Src) >> 8) & 0xFF); \
(Dst)[2] = (UINT8) ((Src) & 0xFF); \
} while (0);
#define NTOH24(src) (((src)[0] << 16) | ((src)[1] << 8) | ((src)[2]))
#define ISCSI_GET_DATASEG_LEN(PduHdr) NTOH24 (((ISCSI_BASIC_HEADER *) (PduHdr))->DataSegmentLength)
#define ISCSI_SET_DATASEG_LEN(PduHdr, Len) HTON24 (((ISCSI_BASIC_HEADER *) (PduHdr))->DataSegmentLength, (Len))
//
// initiator opcodes
//
#define ISCSI_OPCODE_NOP_OUT 0x00
#define ISCSI_OPCODE_SCSI_CMD 0x01
#define ISCSI_OPCODE_SCSI_TMF_REQ 0x02
#define ISCSI_OPCODE_LOGIN_REQ 0x03
#define ISCSI_OPCODE_TEXT_REQ 0x04
#define ISCSI_OPCODE_SCSI_DATA_OUT 0x05
#define ISCSI_OPCODE_LOGOUT_REQ 0x06
#define ISCSI_OPCODE_SNACK_REQ 0x10
#define ISCSI_OPCODE_VENDOR_I0 0x1c
#define ISCSI_OPCODE_VENDOR_I1 0x1d
#define ISCSI_OPCODE_VENDOR_I2 0x1e
//
// target opcodes
//
#define ISCSI_OPCODE_NOP_IN 0x20
#define ISCSI_OPCODE_SCSI_RSP 0x21
#define ISCSI_OPCODE_SCSI_TMF_RSP 0x22
#define ISCSI_OPCODE_LOGIN_RSP 0x23
#define ISCSI_OPCODE_TEXT_RSP 0x24
#define ISCSI_OPCODE_SCSI_DATA_IN 0x25
#define ISCSI_OPCODE_LOGOUT_RSP 0x26
#define ISCSI_OPCODE_R2T 0x31
#define ISCSI_OPCODE_ASYNC_MSG 0x32
#define ISCSI_OPCODE_VENDOR_T0 0x3c
#define ISCSI_OPCODE_VENDOR_T1 0x3d
#define ISCSI_OPCODE_VENDOR_T2 0x3e
#define ISCSI_OPCODE_REJECT 0x3f
#define ISCSI_BHS_FLAG_FINAL 0x80
//
// iSCSI Basic Header Segment
//
typedef struct _ISCSI_BASIC_HEADER {
UINT8 OpCode;
UINT8 Flags;
UINT16 OpCodeSpecific1;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 Lun[8];
UINT32 InitiatorTaskTag;
UINT32 OpCodeSpecific2[7];
} ISCSI_BASIC_HEADER;
//
// Defined AHS types, others are reserved.
//
#define ISCSI_AHS_TYPE_EXT_CDB 0x1
#define ISCSI_AHS_TYPE_BI_EXP_READ_DATA_LEN 0x2
typedef struct _ISCSI_ADDTIONAL_HEADER {
UINT16 Length;
UINT8 Type;
UINT8 TypeSpecific[1];
} ISCSI_ADDITIONAL_HEADER;
typedef struct _ISCSI_BI_EXP_READ_DATA_LEN_AHS {
UINT16 Length;
UINT8 Type;
UINT8 Reserved;
UINT32 ExpReadDataLength;
} ISCSI_BI_EXP_READ_DATA_LEN_AHS;
#define SCSI_CMD_PDU_FLAG_READ 0x40
#define SCSI_CMD_PDU_FLAG_WRITE 0x20
#define ISCSI_CMD_PDU_TASK_ATTR_MASK 0x07
//
// task attributes
//
#define ISCSI_TASK_ATTR_UNTAGGED 0x00
#define ISCSI_TASK_ATTR_SIMPLE 0x01
#define ISCSI_TASK_ATTR_ORDERD 0x02
#define ISCSI_TASK_ATTR_HOQ 0x03
#define ISCSI_TASK_ATTR_ACA 0x04
//
// SCSI Command
//
typedef struct _SCSI_COMMAND {
UINT8 OpCode;
UINT8 Flags;
UINT16 Reserved;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 Lun[8];
UINT32 InitiatorTaskTag;
UINT32 ExpDataXferLength;
UINT32 CmdSN;
UINT32 ExpStatSN;
UINT8 CDB[16];
} SCSI_COMMAND;
//
// flag bit definitions in SCSI response
//
#define SCSI_RSP_PDU_FLAG_BI_READ_OVERFLOW 0x10
#define SCSI_RSP_PDU_FLAG_BI_READ_UNDERFLOW 0x08
#define SCSI_RSP_PDU_FLAG_OVERFLOW 0x04
#define SCSI_RSP_PDU_FLAG_UNDERFLOW 0x02
//
// iSCSI service response codes
//
#define ISCSI_SERVICE_RSP_COMMAND_COMPLETE_AT_TARGET 0x00
#define ISCSI_SERVICE_RSP_TARGET_FAILURE 0x01
//
// SCSI Response
//
typedef struct _SCSI_RESPONSE {
UINT8 OpCode;
UINT8 Flags;
UINT8 Response;
UINT8 Status;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 Reserved[8];
UINT32 InitiatorTaskTag;
UINT32 SNACKTag;
UINT32 StatSN;
UINT32 ExpCmdSN;
UINT32 MaxCmdSN;
UINT32 ExpDataSN;
UINT32 BiReadResidualCount;
UINT32 ResidualCount;
} SCSI_RESPONSE;
typedef struct _ISCSI_SENSE_DATA {
UINT16 Length;
UINT8 Data[2];
} ISCSI_SENSE_DATA;
//
// iSCSI Task Managment Function Request
//
typedef struct _ISCSI_TMF_REQUEST {
UINT8 OpCode;
UINT8 Fuction;
UINT16 Reserved1;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 Lun[8];
UINT32 InitiatorTaskTag;
UINT32 ReferencedTaskTag;
UINT32 CmdSN;
UINT32 ExpStatSN;
UINT32 RefCmdSN;
UINT32 ExpDataSN;
UINT32 Reserved2[2];
} ISCSI_TMF_REQUEST;
#define ISCSI_TMF_RSP_PDU_RSP_FUNCTION_COMPLETE 0
#define ISCSI_TMF_RSP_PDU_RSP_TASK_NOT_EXIST 1
#define ISCSI_TMF_RSP_PDU_RSP_LUN_NOT_EXIST 2
#define ISCSI_TMF_RSP_PDU_RSP_TASK_STILL_ALLEGIANT 3
#define ISCSI_TMF_RSP_PDU_RSP_TASK_REASSGIN_NOT_SUPPORTED 4
#define ISCSI_TMF_RSP_PDU_RSP_NOT_SUPPORTED 5
#define ISCSI_TMF_RSP_PDU_RSP_FUNCTION_AHTH_FAILED 6
#define ISCSI_TMF_RSP_PDU_RSP_FUNCTION_REJECTED 255
//
// iSCSI Task Management Function Response
//
typedef struct _ISCSI_TMF_RESPONSE {
UINT8 OpCode;
UINT8 Reserved1;
UINT8 Response;
UINT8 Reserved2;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT32 Reserver3[2];
UINT32 InitiatorTaskTag;
UINT32 Reserved4;
UINT32 StatSN;
UINT32 ExpCmdSN;
UINT32 MaxCmdSN;
UINT32 Reserved[3];
} ISCSI_TMF_RESPONSE;
//
// SCSI Data-Out
//
typedef struct _ISCSI_SCSI_DATA_OUT {
UINT8 OpCode;
UINT8 Reserved1[3];
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 Lun[8];
UINT32 InitiatorTaskTag;
UINT32 TargetTransferTag;
UINT32 Reserved2;
UINT32 ExpStatSN;
UINT32 Reserved3;
UINT32 DataSN;
UINT32 BufferOffset;
UINT32 Reserved4;
} ISCSI_SCSI_DATA_OUT;
#define SCSI_DATA_IN_PDU_FLAG_ACKKNOWLEDGE 0x40
#define SCSI_DATA_IN_PDU_FLAG_OVERFLOW SCSI_RSP_PDU_FLAG_OVERFLOW
#define SCSI_DATA_IN_PDU_FLAG_UNDERFLOW SCSI_RSP_PDU_FLAG_UNDERFLOW
#define SCSI_DATA_IN_PDU_FLAG_STATUS_VALID 0x01
//
// SCSI Data-In
//
typedef struct _ISCSI_SCSI_DATA_IN {
UINT8 OpCode;
UINT8 Flags;
UINT8 Reserved1;
UINT8 Status;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 Lun[8];
UINT32 InitiatorTaskTag;
UINT32 TargetTransferTag;
UINT32 StatSN;
UINT32 ExpCmdSN;
UINT32 MaxCmdSN;
UINT32 DataSN;
UINT32 BufferOffset;
UINT32 ResidualCount;
} ISCSI_SCSI_DATA_IN;
#define ISCSI_GET_BUFFER_OFFSET(PduHdr) NTOHL (((ISCSI_SCSI_DATA_IN *) (PduHdr))->BufferOffset)
//
// Ready To Transfer
//
typedef struct _ISCSI_READY_TO_TRANSFER {
UINT8 OpCode;
UINT8 Reserved1[3];
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 Lun[8];
UINT32 InitiatorTaskTag;
UINT32 TargetTransferTag;
UINT32 StatSN;
UINT32 ExpCmdSN;
UINT32 MaxCmdSN;
UINT32 R2TSN;
UINT32 BufferOffset;
UINT32 DesiredDataTransferLength;
} ISCSI_READY_TO_TRANSFER;
typedef struct _ISCSI_ASYNC_MESSAGE {
UINT8 OpCode;
UINT8 Reserved1[8];
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 Lun[8];
UINT32 InitiatorTaskTag;
UINT32 Reserved2;
UINT32 StatSN;
UINT32 ExpCmdSN;
UINT32 MaxCmdSN;
UINT8 AsyncEvent;
UINT8 AsyncVCode;
UINT16 Parameter1;
UINT16 Parameter2;
UINT16 Parameter3;
UINT32 Reserved3;
} ISCSI_ASYNC_MESSAGE;
#define ISCSI_LOGIN_REQ_PDU_FLAG_TRANSIT 0x80
#define ISCSI_LOGIN_REQ_PDU_FLAG_CONTINUE 0x40
//
// Login Request
//
typedef struct _ISCSI_LOGIN_REQUEST {
UINT8 OpCode;
UINT8 Flags;
UINT8 VersionMax;
UINT8 VersionMin;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 ISID[6];
UINT16 TSIH;
UINT32 InitiatorTaskTag;
UINT16 CID;
UINT16 Reserved1;
UINT32 CmdSN;
UINT32 ExpStatSN;
UINT32 Reserved2[4];
} ISCSI_LOGIN_REQUEST;
#define ISCSI_LOGIN_RSP_PDU_FLAG_TRANSIT ISCSI_LOGIN_REQ_PDU_FLAG_TRANSIT
#define ISCSI_LOGIN_RSP_PDU_FLAG_CONTINUE ISCSI_LOGIN_REQ_PDU_FLAG_CONTINUE
#define ISCSI_LOGIN_STATUS_SUCCESS 0
#define ISCSI_LOGIN_STATUS_REDIRECTION 1
#define ISCSI_LOGIN_STATUS_INITIATOR_ERROR 2
#define ISCSI_LOGIN_STATUS_TARGET_ERROR 3
//
// Login Response
//
typedef struct _ISCSI_LOGIN_RESPONSE {
UINT8 OpCode;
UINT8 Flags;
UINT8 VersionMax;
UINT8 VersionActive;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 ISID[6];
UINT16 TSIH;
UINT32 InitiatorTaskTag;
UINT32 Reserved1;
UINT32 StatSN;
UINT32 ExpCmdSN;
UINT32 MaxCmdSN;
UINT8 StatusClass;
UINT8 StatusDetail;
UINT8 Reserved2[10];
} ISCSI_LOGIN_RESPONSE;
#define ISCSI_LOGOUT_REASON_CLOSE_SESSION 0
#define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION 1
#define ISCSI_LOGOUT_REASON_REMOVE_CONNECTION_FOR_RECOVERY 2
//
// Logout Request
//
typedef struct _ISCSI_LOGOUT_REQUEST {
UINT8 OpCode;
UINT8 ReasonCode;
UINT16 Reserved1;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT32 Reserved2[2];
UINT32 InitiatorTaskTag;
UINT16 CID;
UINT16 Reserved3;
UINT32 CmdSN;
UINT32 ExpStatSN;
UINT32 Reserved4[4];
} ISCSI_LOGOUT_REQUEST;
#define ISCSI_LOGOUT_RESPONSE_SESSION_CLOSED_SUCCESS 0
#define ISCSI_LOGOUT_RESPONSE_CID_NOT_FOUND 1
#define ISCSI_LOGOUT_RESPONSE_RECOVERY_NOT_SUPPORTED 2
#define ISCSI_LOGOUT_RESPONSE_CLEANUP_FAILED 3
//
// Logout Response
//
typedef struct _ISCSI_LOGOUT_RESPONSE {
UINT8 OpCode;
UINT8 Reserved1;
UINT8 Response;
UINT8 Reserved2;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT32 Reserved3[2];
UINT32 InitiatorTaskTag;
UINT32 Reserved4;
UINT32 StatSN;
UINT32 ExpCmdSN;
UINT32 MaxCmdSN;
UINT32 Reserved5;
UINT16 Time2Wait;
UINT16 Time2Retain;
UINT32 Reserved6;
} ISCSI_LOGOUT_RESPONSE;
#define ISCSI_SNACK_REQUEST_TYPE_DATA_OR_R2T 0
#define ISCSI_SNACK_REQUEST_TYPE_STATUS 1
#define ISCSI_SNACK_REQUEST_TYPE_DATA_ACK 2
#define ISCSI_SNACK_REQUEST_TYPE_RDATA 3
//
// SNACK Request
//
typedef struct _ISCSI_SNACK_REQUEST {
UINT8 OpCode;
UINT8 Type;
UINT16 Reserved1;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 Lun[8];
UINT32 InitiatorTaskTag;
UINT32 TargetTransferTag;
UINT32 Reserved2;
UINT32 ExpStatSN;
UINT32 Reserved[2];
UINT32 BegRun;
UINT32 RunLength;
} ISCSI_SNACK_REQUEST;
//
// Reject
//
typedef struct _ISCSI_REJECT {
UINT8 OpCode;
UINT8 Reserved1;
UINT8 Reason;
UINT8 Reserved2;
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT32 Reserved3[2];
UINT32 InitiatorTaskTag;
UINT32 Reserved4;
UINT32 StatSN;
UINT32 ExpCmdSN;
UINT32 MaxCmdSN;
UINT32 DataSN;
UINT32 Reserved5[2];
} ISCSI_REJECT;
//
// NOP-Out
//
typedef struct _ISCSI_NOP_OUT {
UINT8 OpCode;
UINT8 Reserved1[3];
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 Lun[8];
UINT32 InitiatorTaskTag;
UINT32 TargetTransferTag;
UINT32 CmdSN;
UINT32 ExpStatSN;
UINT32 Reserved2[4];
} ISCSI_NOP_OUT;
//
// NOP-In
//
typedef struct _ISCSI_NOP_IN {
UINT8 OpCode;
UINT8 Reserved1[3];
UINT8 TotalAHSLength;
UINT8 DataSegmentLength[3];
UINT8 Lun[8];
UINT32 InitiatorTaskTag;
UINT32 TargetTransferTag;
UINT32 StatSN;
UINT32 ExpCmdSN;
UINT32 MaxCmdSN;
UINT32 Reserved2[3];
} ISCSI_NOP_IN;
#define ISCSI_SECURITY_NEGOTIATION 0
#define ISCSI_LOGIN_OPERATIONAL_NEGOTIATION 1
#define ISCSI_FULL_FEATURE_PHASE 3
typedef enum {
ISCSI_DIGEST_NONE,
ISCSI_DIGEST_CRC32
} ISCSI_DIGEST_TYPE;
typedef struct _ISCSI_XFER_CONTEXT {
UINT32 TargetTransferTag;
UINT32 Offset;
UINT32 DesiredLength;
UINT32 ExpDataSN;
} ISCSI_XFER_CONTEXT;
typedef struct _ISCSI_IN_BUFFER_CONTEXT {
UINT8 *InData;
UINT32 InDataLen;
} ISCSI_IN_BUFFER_CONTEXT;
typedef struct _ISCSI_TCB {
LIST_ENTRY Link;
BOOLEAN SoFarInOrder;
UINT32 ExpDataSN;
BOOLEAN FbitReceived;
BOOLEAN StatusXferd;
UINT32 ActiveR2Ts;
UINT32 Response;
CHAR8 *Reason;
UINT32 InitiatorTaskTag;
UINT32 CmdSN;
UINT32 SNACKTag;
ISCSI_XFER_CONTEXT XferContext;
ISCSI_CONNECTION *Conn;
} ISCSI_TCB;
typedef struct _ISCSI_KEY_VALUE_PAIR {
LIST_ENTRY List;
CHAR8 *Key;
CHAR8 *Value;
} ISCSI_KEY_VALUE_PAIR;
//
// function prototypes.
//
/**
Attach the iSCSI connection to the iSCSI session.
@param Session[in] The iSCSI session.
@param Conn[in] The iSCSI connection.
@retval None.
**/
VOID
IScsiAttatchConnection (
IN ISCSI_SESSION *Session,
IN ISCSI_CONNECTION *Conn
);
/**
Detach the iSCSI connection from the session it belongs to.
@param Conn[in] The iSCSI connection.
@retval None.
**/
VOID
IScsiDetatchConnection (
IN ISCSI_CONNECTION *Conn
);
/**
This function does the iSCSI connection login.
@param Conn[in] The iSCSI connection to login.
@retval EFI_SUCCESS The iSCSI connection is logged into the iSCSI target.
@retval EFI_TIMEOUT Timeout happened during the login procedure.
@retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol error happened.
**/
EFI_STATUS
IScsiConnLogin (
IN ISCSI_CONNECTION *Conn
);
/**
Create a TCP connection for the iSCSI session.
@param Private[in] The iSCSI driver data.
@param Session[in] Maximum CmdSN from the target.
@retval The newly created iSCSI connection.
**/
ISCSI_CONNECTION *
IScsiCreateConnection (
IN ISCSI_DRIVER_DATA *Private,
IN ISCSI_SESSION *Session
);
/**
Destroy an iSCSI connection.
@param Conn[in] The connection to destroy.
@retval None.
**/
VOID
IScsiDestroyConnection (
IN ISCSI_CONNECTION *Conn
);
/**
Login the iSCSI session.
@param Private[in] The iSCSI driver data.
@retval EFI_SUCCESS The iSCSI session login procedure finished.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
@retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol error happened.
**/
EFI_STATUS
IScsiSessionLogin (
IN ISCSI_DRIVER_DATA *Private
);
/**
Build and send the iSCSI login request to the iSCSI target according to
the current login stage.
@param Conn[in] The connection in the iSCSI login phase.
@retval EFI_SUCCESS The iSCSI login request PDU is built and sent on this
connection.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
@retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol error happened.
**/
EFI_STATUS
IScsiSendLoginReq (
IN ISCSI_CONNECTION *Conn
);
/**
Receive and process the iSCSI login response.
@param Conn[in] The connection in the iSCSI login phase.
@retval EFI_SUCCESS The iSCSI login response PDU is received and processed.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
@retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol error happened.
**/
EFI_STATUS
IScsiReceiveLoginRsp (
IN ISCSI_CONNECTION *Conn
);
/**
Add an iSCSI key-value pair as a string into the data segment of the Login Request PDU.
The DataSegmentLength and the actual size of the net buffer containing this PDU will be
updated.
@param Pdu[in] The iSCSI PDU whose data segment the key-value pair will
be added to.
@param Key[in] The key name string.
@param Value[in] The value string.
@retval EFI_SUCCESS The key-valu pair is added to the PDU's datasegment and
the correspondence length fields are updated.
@retval EFI_OUT_OF_RESOURCES There is not enough space in the PDU to add the key-value
pair.
**/
EFI_STATUS
IScsiAddKeyValuePair (
IN NET_BUF *Pdu,
IN CHAR8 *Key,
IN CHAR8 *Value
);
/**
Prepare the iSCSI login request to be sent according to the current login status.
@param Conn[in] The connection in the iSCSI login phase.
@retval The pointer to the net buffer containing the iSCSI login request built.
**/
NET_BUF *
IScsiPrepareLoginReq (
IN ISCSI_CONNECTION *Conn
);
/**
Process the iSCSI Login Response.
@param Conn[in] The connection on which the iSCSI login response is received.
@param Pdu[in] The iSCSI login response PDU.
@retval EFI_SUCCESS The iSCSI login response PDU is processed and all check are passed.
@retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol error happened.
**/
EFI_STATUS
IScsiProcessLoginRsp (
IN ISCSI_CONNECTION *Conn,
IN NET_BUF *Pdu
);
/**
Updated the target information according the data received in the iSCSI
login response with an target redirection status.
@param Session[in] The iSCSI session.
@param Data[in] The data segment which should contain the
TargetAddress key-value list.
@param Len[in] Length of the data.
@retval EFI_SUCCESS The target address is updated.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
@retval EFI_NOT_FOUND The TargetAddress key is not found.
**/
EFI_STATUS
IScsiUpdateTargetAddress (
IN ISCSI_SESSION *Session,
IN CHAR8 *Data,
IN UINT32 Len
);
/**
The callback function to free the net buffer list.
@param Arg[in] The opaque parameter.
@retval None.
**/
VOID
IScsiFreeNbufList (
VOID *Arg
);
/**
Receive an iSCSI response PDU. An iSCSI response PDU contains an iSCSI PDU header and
an optional data segment. The two parts will be put into two blocks of buffers in the
net buffer. The digest check will be conducted in this function if needed and the digests
will be trimmed from the PDU buffer.
@param Conn[in] The iSCSI connection to receive data from.
@param Pdu[out] The received iSCSI pdu.
@param Context[in] The context used to describe information on the caller provided
buffer to receive data segment of the iSCSI pdu, it's optional.
@param HeaderDigest[in] Whether there will be header digest received.
@param DataDigest[in] Whether there will be data digest.
@param TimeoutEvent[in] The timeout event, it's optional.
@retval EFI_SUCCESS An iSCSI pdu is received.
@retval EFI_TIMEOUT Timeout happenend.
**/
EFI_STATUS
IScsiReceivePdu (
IN ISCSI_CONNECTION *Conn,
OUT NET_BUF **Pdu,
IN ISCSI_IN_BUFFER_CONTEXT *Context, OPTIONAL
IN BOOLEAN HeaderDigest,
IN BOOLEAN DataDigest,
IN EFI_EVENT TimeoutEvent OPTIONAL
);
/**
Check and get the result of the prameter negotiation.
@param Conn[in] The connection in iSCSI login.
@param Pdu[in] The iSCSI response PDU containing the parameter list.
@retval EFI_SUCCESS The parmeter check is passed and negotiation is finished.
@retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol error happened.
**/
EFI_STATUS
IScsiCheckOpParams (
IN ISCSI_CONNECTION *Conn,
IN BOOLEAN Transit
);
/**
Fill the oprational prameters.
@param Conn[in] The connection in iSCSI login.
@param Pdu[in] The iSCSI login request PDU to fill the parameters.
@retval EFI_SUCCESS The parmeters are filled into the iSCSI login request PDU.
@retval EFI_OUT_OF_RESOURCES There is not enough space in the PDU to hold the parameters.
**/
EFI_STATUS
IScsiFillOpParams (
IN ISCSI_CONNECTION *Conn,
IN NET_BUF *Pdu
);
/**
Pad the iSCSI AHS or data segment to an integer number of 4 byte words.
@param Pdu[in] The iSCSI pdu which contains segments to pad.
@param Len[in] The length of the last semgnet in the PDU.
@retval EFI_SUCCESS The segment is padded or no need to pad it.
@retval EFI_OUT_OF_RESOURCES There is not enough remaining free space to add the
padding bytes.
**/
EFI_STATUS
IScsiPadSegment (
IN NET_BUF *Pdu,
IN UINT32 Len
);
/**
Build a key-value list from the data segment.
@param Data[in] The data segment containing the key-value pairs.
@param Len[in] Length of the data segment.
@retval The key-value list.
**/
LIST_ENTRY *
IScsiBuildKeyValueList (
IN CHAR8 *Data,
IN UINT32 Len
);
/**
Get the value string by the key name from the key-value list. If found,
the key-value entry will be removed from the list.
@param KeyValueList[in] The key-value list.
@param Key[in] The key name to find.
@retval The value string.
**/
CHAR8 *
IScsiGetValueByKeyFromList (
IN LIST_ENTRY *KeyValueList,
IN CHAR8 *Key
);
/**
Free the key-value list.
@param KeyValueList[in] The key-value list.
@retval None.
**/
VOID
IScsiFreeKeyValueList (
IN LIST_ENTRY *KeyValueList
);
/**
Normalize the iSCSI name according to RFC.
@param Name[in] The iSCSI name.
@param Len[in] length of the iSCSI name.
@retval EFI_SUCCESS The iSCSI name is valid and normalized.
@retval EFI_PROTOCOL_ERROR The iSCSI name is mal-formatted or not in the IQN format.
**/
EFI_STATUS
IScsiNormalizeName (
IN CHAR8 *Name,
IN UINTN Len
);
/**
Execute the SCSI command issued through the EXT SCSI PASS THRU protocol.
@param PassThru[in] The EXT SCSI PASS THRU protocol.
@param Target[in] The target ID.
@param Lun[in] The LUN.
@param Packet[in][out] The request packet containing IO request, SCSI command
buffer and buffers to read/write.
@retval EFI_SUCCES The SCSI command is executed and the result is updated to
the Packet.
@retval EFI_DEVICE_ERROR Some unexpected error happened.
**/
EFI_STATUS
IScsiExecuteScsiCommand (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *PassThru,
IN UINT8 *Target,
IN UINT64 Lun,
IN OUT EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET *Packet
);
/**
Reinstate the session on some error.
@param Private[in] The iSCSI driver data.
@retval EFI_SUCCES The session is reinstated from some error.
@retval other Reinstatement failed.
**/
EFI_STATUS
IScsiSessionReinstatement (
IN ISCSI_DRIVER_DATA *Private
);
/**
Initialize some session parameters before login.
@param Session[in] The iSCSI session.
@param Recovery[in] Whether the request is from a fresh new start or recovery.
@retval None.
**/
VOID
IScsiSessionInit (
IN ISCSI_SESSION *Session,
IN BOOLEAN Recovery
);
/**
Abort the iSCSI session, that is, reset all the connection and free the
resources.
@param Session[in] The iSCSI session.
@retval EFI_SUCCES The session is aborted.
**/
EFI_STATUS
IScsiSessionAbort (
IN ISCSI_SESSION *Session
);
#endif
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