drivers/infiniband/sw/siw/iwarp.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */

 /* Authors: Bernard Metzler <bmt@zurich.ibm.com> */
 /* Copyright (c) 2008-2019, IBM Corporation */

 #ifndef _IWARP_H
 #define _IWARP_H

 #include <rdma/rdma_user_cm.h> /* RDMA_MAX_PRIVATE_DATA */
 #include <linux/types.h>
 #include <asm/byteorder.h>

 #define RDMAP_VERSION 1
 #define DDP_VERSION 1
 #define MPA_REVISION_1 1
 #define MPA_REVISION_2 2
 #define MPA_MAX_PRIVDATA RDMA_MAX_PRIVATE_DATA
 #define MPA_KEY_REQ "MPA ID Req Frame"
 #define MPA_KEY_REP "MPA ID Rep Frame"
 #define MPA_IRD_ORD_MASK 0x3fff

 struct mpa_rr_params {
 	__be16 bits;
 	__be16 pd_len;
 };

 /*
  * MPA request/response header bits & fields
  */
 enum {
 	MPA_RR_FLAG_MARKERS = cpu_to_be16(0x8000),
 	MPA_RR_FLAG_CRC = cpu_to_be16(0x4000),
 	MPA_RR_FLAG_REJECT = cpu_to_be16(0x2000),
 	MPA_RR_FLAG_ENHANCED = cpu_to_be16(0x1000),
 	MPA_RR_FLAG_GSO_EXP = cpu_to_be16(0x0800),
 	MPA_RR_MASK_REVISION = cpu_to_be16(0x00ff)
 };

 /*
  * MPA request/reply header
  */
 struct mpa_rr {
 	__u8 key[16];
 	struct mpa_rr_params params;
 };

 static inline void __mpa_rr_set_revision(__be16 *bits, u8 rev)
 {
 	*bits = (*bits & ~MPA_RR_MASK_REVISION) |
 		(cpu_to_be16(rev) & MPA_RR_MASK_REVISION);
 }

 static inline u8 __mpa_rr_revision(__be16 mpa_rr_bits)
 {
 	__be16 rev = mpa_rr_bits & MPA_RR_MASK_REVISION;

 	return be16_to_cpu(rev);
 }

 enum mpa_v2_ctrl {
 	MPA_V2_PEER_TO_PEER = cpu_to_be16(0x8000),
 	MPA_V2_ZERO_LENGTH_RTR = cpu_to_be16(0x4000),
 	MPA_V2_RDMA_WRITE_RTR = cpu_to_be16(0x8000),
 	MPA_V2_RDMA_READ_RTR = cpu_to_be16(0x4000),
 	MPA_V2_RDMA_NO_RTR = cpu_to_be16(0x0000),
 	MPA_V2_MASK_IRD_ORD = cpu_to_be16(0x3fff)
 };

 struct mpa_v2_data {
 	__be16 ird;
 	__be16 ord;
 };

 struct mpa_marker {
 	__be16 rsvd;
 	__be16 fpdu_hmd; /* FPDU header-marker distance (= MPA's FPDUPTR) */
 };

 /*
  * maximum MPA trailer
  */
 struct mpa_trailer {
 	__u8 pad[4];
 	__be32 crc;
 };

 #define MPA_HDR_SIZE 2
 #define MPA_CRC_SIZE 4

 /*
  * Common portion of iWARP headers (MPA, DDP, RDMAP)
  * for any FPDU
  */
 struct iwarp_ctrl {
 	__be16 mpa_len;
 	__be16 ddp_rdmap_ctrl;
 };

 /*
  * DDP/RDMAP Hdr bits & fields
  */
 enum {
 	DDP_FLAG_TAGGED = cpu_to_be16(0x8000),
 	DDP_FLAG_LAST = cpu_to_be16(0x4000),
 	DDP_MASK_RESERVED = cpu_to_be16(0x3C00),
 	DDP_MASK_VERSION = cpu_to_be16(0x0300),
 	RDMAP_MASK_VERSION = cpu_to_be16(0x00C0),
 	RDMAP_MASK_RESERVED = cpu_to_be16(0x0030),
 	RDMAP_MASK_OPCODE = cpu_to_be16(0x000f)
 };

 static inline u8 __ddp_get_version(struct iwarp_ctrl *ctrl)
 {
 	return be16_to_cpu(ctrl->ddp_rdmap_ctrl & DDP_MASK_VERSION) >> 8;
 }

 static inline void __ddp_set_version(struct iwarp_ctrl *ctrl, u8 version)
 {
 	ctrl->ddp_rdmap_ctrl =
 		(ctrl->ddp_rdmap_ctrl & ~DDP_MASK_VERSION) |
 		(cpu_to_be16((u16)version << 8) & DDP_MASK_VERSION);
 }

 static inline u8 __rdmap_get_version(struct iwarp_ctrl *ctrl)
 {
 	__be16 ver = ctrl->ddp_rdmap_ctrl & RDMAP_MASK_VERSION;

 	return be16_to_cpu(ver) >> 6;
 }

 static inline void __rdmap_set_version(struct iwarp_ctrl *ctrl, u8 version)
 {
 	ctrl->ddp_rdmap_ctrl = (ctrl->ddp_rdmap_ctrl & ~RDMAP_MASK_VERSION) |
 			       (cpu_to_be16(version << 6) & RDMAP_MASK_VERSION);
 }

 static inline u8 __rdmap_get_opcode(struct iwarp_ctrl *ctrl)
 {
 	return be16_to_cpu(ctrl->ddp_rdmap_ctrl & RDMAP_MASK_OPCODE);
 }

 static inline void __rdmap_set_opcode(struct iwarp_ctrl *ctrl, u8 opcode)
 {
 	ctrl->ddp_rdmap_ctrl = (ctrl->ddp_rdmap_ctrl & ~RDMAP_MASK_OPCODE) |
 			       (cpu_to_be16(opcode) & RDMAP_MASK_OPCODE);
 }

 struct iwarp_rdma_write {
 	struct iwarp_ctrl ctrl;
 	__be32 sink_stag;
 	__be64 sink_to;
 };

 struct iwarp_rdma_rreq {
 	struct iwarp_ctrl ctrl;
 	__be32 rsvd;
 	__be32 ddp_qn;
 	__be32 ddp_msn;
 	__be32 ddp_mo;
 	__be32 sink_stag;
 	__be64 sink_to;
 	__be32 read_size;
 	__be32 source_stag;
 	__be64 source_to;
 };

 struct iwarp_rdma_rresp {
 	struct iwarp_ctrl ctrl;
 	__be32 sink_stag;
 	__be64 sink_to;
 };

 struct iwarp_send {
 	struct iwarp_ctrl ctrl;
 	__be32 rsvd;
 	__be32 ddp_qn;
 	__be32 ddp_msn;
 	__be32 ddp_mo;
 };

 struct iwarp_send_inv {
 	struct iwarp_ctrl ctrl;
 	__be32 inval_stag;
 	__be32 ddp_qn;
 	__be32 ddp_msn;
 	__be32 ddp_mo;
 };

 struct iwarp_terminate {
 	struct iwarp_ctrl ctrl;
 	__be32 rsvd;
 	__be32 ddp_qn;
 	__be32 ddp_msn;
 	__be32 ddp_mo;
 #if defined(__LITTLE_ENDIAN_BITFIELD)
 	__be32 layer : 4;
 	__be32 etype : 4;
 	__be32 ecode : 8;
 	__be32 flag_m : 1;
 	__be32 flag_d : 1;
 	__be32 flag_r : 1;
 	__be32 reserved : 13;
 #elif defined(__BIG_ENDIAN_BITFIELD)
 	__be32 reserved : 13;
 	__be32 flag_r : 1;
 	__be32 flag_d : 1;
 	__be32 flag_m : 1;
 	__be32 ecode : 8;
 	__be32 etype : 4;
 	__be32 layer : 4;
 #else
 #error "undefined byte order"
 #endif
 };

 /*
  * Terminate Hdr bits & fields
  */
 enum {
 	TERM_MASK_LAYER = cpu_to_be32(0xf0000000),
 	TERM_MASK_ETYPE = cpu_to_be32(0x0f000000),
 	TERM_MASK_ECODE = cpu_to_be32(0x00ff0000),
 	TERM_FLAG_M = cpu_to_be32(0x00008000),
 	TERM_FLAG_D = cpu_to_be32(0x00004000),
 	TERM_FLAG_R = cpu_to_be32(0x00002000),
 	TERM_MASK_RESVD = cpu_to_be32(0x00001fff)
 };

 static inline u8 __rdmap_term_layer(struct iwarp_terminate *term)
 {
 	return term->layer;
 }

 static inline void __rdmap_term_set_layer(struct iwarp_terminate *term,
 					  u8 layer)
 {
 	term->layer = layer & 0xf;
 }

 static inline u8 __rdmap_term_etype(struct iwarp_terminate *term)
 {
 	return term->etype;
 }

 static inline void __rdmap_term_set_etype(struct iwarp_terminate *term,
 					  u8 etype)
 {
 	term->etype = etype & 0xf;
 }

 static inline u8 __rdmap_term_ecode(struct iwarp_terminate *term)
 {
 	return term->ecode;
 }

 static inline void __rdmap_term_set_ecode(struct iwarp_terminate *term,
 					  u8 ecode)
 {
 	term->ecode = ecode;
 }

 /*
  * Common portion of iWARP headers (MPA, DDP, RDMAP)
  * for an FPDU carrying an untagged DDP segment
  */
 struct iwarp_ctrl_untagged {
 	struct iwarp_ctrl ctrl;
 	__be32 rsvd;
 	__be32 ddp_qn;
 	__be32 ddp_msn;
 	__be32 ddp_mo;
 };

 /*
  * Common portion of iWARP headers (MPA, DDP, RDMAP)
  * for an FPDU carrying a tagged DDP segment
  */
 struct iwarp_ctrl_tagged {
 	struct iwarp_ctrl ctrl;
 	__be32 ddp_stag;
 	__be64 ddp_to;
 };

 union iwarp_hdr {
 	struct iwarp_ctrl ctrl;
 	struct iwarp_ctrl_untagged c_untagged;
 	struct iwarp_ctrl_tagged c_tagged;
 	struct iwarp_rdma_write rwrite;
 	struct iwarp_rdma_rreq rreq;
 	struct iwarp_rdma_rresp rresp;
 	struct iwarp_terminate terminate;
 	struct iwarp_send send;
 	struct iwarp_send_inv send_inv;
 };

 enum term_elayer {
 	TERM_ERROR_LAYER_RDMAP = 0x00,
 	TERM_ERROR_LAYER_DDP = 0x01,
 	TERM_ERROR_LAYER_LLP = 0x02 /* eg., MPA */
 };

 enum ddp_etype {
 	DDP_ETYPE_CATASTROPHIC = 0x0,
 	DDP_ETYPE_TAGGED_BUF = 0x1,
 	DDP_ETYPE_UNTAGGED_BUF = 0x2,
 	DDP_ETYPE_RSVD = 0x3
 };

 enum ddp_ecode {
 	/* unspecified, set to zero */
 	DDP_ECODE_CATASTROPHIC = 0x00,
 	/* Tagged Buffer Errors */
 	DDP_ECODE_T_INVALID_STAG = 0x00,
 	DDP_ECODE_T_BASE_BOUNDS = 0x01,
 	DDP_ECODE_T_STAG_NOT_ASSOC = 0x02,
 	DDP_ECODE_T_TO_WRAP = 0x03,
 	DDP_ECODE_T_VERSION = 0x04,
 	/* Untagged Buffer Errors */
 	DDP_ECODE_UT_INVALID_QN = 0x01,
 	DDP_ECODE_UT_INVALID_MSN_NOBUF = 0x02,
 	DDP_ECODE_UT_INVALID_MSN_RANGE = 0x03,
 	DDP_ECODE_UT_INVALID_MO = 0x04,
 	DDP_ECODE_UT_MSG_TOOLONG = 0x05,
 	DDP_ECODE_UT_VERSION = 0x06
 };

 enum rdmap_untagged_qn {
 	RDMAP_UNTAGGED_QN_SEND = 0,
 	RDMAP_UNTAGGED_QN_RDMA_READ = 1,
 	RDMAP_UNTAGGED_QN_TERMINATE = 2,
 	RDMAP_UNTAGGED_QN_COUNT = 3
 };

 enum rdmap_etype {
 	RDMAP_ETYPE_CATASTROPHIC = 0x0,
 	RDMAP_ETYPE_REMOTE_PROTECTION = 0x1,
 	RDMAP_ETYPE_REMOTE_OPERATION = 0x2
 };

 enum rdmap_ecode {
 	RDMAP_ECODE_INVALID_STAG = 0x00,
 	RDMAP_ECODE_BASE_BOUNDS = 0x01,
 	RDMAP_ECODE_ACCESS_RIGHTS = 0x02,
 	RDMAP_ECODE_STAG_NOT_ASSOC = 0x03,
 	RDMAP_ECODE_TO_WRAP = 0x04,
 	RDMAP_ECODE_VERSION = 0x05,
 	RDMAP_ECODE_OPCODE = 0x06,
 	RDMAP_ECODE_CATASTROPHIC_STREAM = 0x07,
 	RDMAP_ECODE_CATASTROPHIC_GLOBAL = 0x08,
 	RDMAP_ECODE_CANNOT_INVALIDATE = 0x09,
 	RDMAP_ECODE_UNSPECIFIED = 0xff
 };

 enum llp_ecode {
 	LLP_ECODE_TCP_STREAM_LOST = 0x01, /* How to transfer this ?? */
 	LLP_ECODE_RECEIVED_CRC = 0x02,
 	LLP_ECODE_FPDU_START = 0x03,
 	LLP_ECODE_INVALID_REQ_RESP = 0x04,

 	/* Errors for Enhanced Connection Establishment only */
 	LLP_ECODE_LOCAL_CATASTROPHIC = 0x05,
 	LLP_ECODE_INSUFFICIENT_IRD = 0x06,
 	LLP_ECODE_NO_MATCHING_RTR = 0x07
 };

 enum llp_etype { LLP_ETYPE_MPA = 0x00 };

 enum rdma_opcode {
 	RDMAP_RDMA_WRITE = 0x0,
 	RDMAP_RDMA_READ_REQ = 0x1,
 	RDMAP_RDMA_READ_RESP = 0x2,
 	RDMAP_SEND = 0x3,
 	RDMAP_SEND_INVAL = 0x4,
 	RDMAP_SEND_SE = 0x5,
 	RDMAP_SEND_SE_INVAL = 0x6,
 	RDMAP_TERMINATE = 0x7,
 	RDMAP_NOT_SUPPORTED = RDMAP_TERMINATE + 1
 };

 #endif
	/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */

	/* Authors: Bernard Metzler <bmt@zurich.ibm.com> */
	/* Copyright (c) 2008-2019, IBM Corporation */

	#ifndef _IWARP_H
	#define _IWARP_H

	#include <rdma/rdma_user_cm.h> /* RDMA_MAX_PRIVATE_DATA */
	#include <linux/types.h>
	#include <asm/byteorder.h>

	#define RDMAP_VERSION 1
	#define DDP_VERSION 1
	#define MPA_REVISION_1 1
	#define MPA_REVISION_2 2
	#define MPA_MAX_PRIVDATA RDMA_MAX_PRIVATE_DATA
	#define MPA_KEY_REQ "MPA ID Req Frame"
	#define MPA_KEY_REP "MPA ID Rep Frame"
	#define MPA_IRD_ORD_MASK 0x3fff

	struct mpa_rr_params {
	__be16 bits;
	__be16 pd_len;
	};

	/*
	* MPA request/response header bits & fields
	*/
	enum {
	MPA_RR_FLAG_MARKERS = cpu_to_be16(0x8000),
	MPA_RR_FLAG_CRC = cpu_to_be16(0x4000),
	MPA_RR_FLAG_REJECT = cpu_to_be16(0x2000),
	MPA_RR_FLAG_ENHANCED = cpu_to_be16(0x1000),
	MPA_RR_FLAG_GSO_EXP = cpu_to_be16(0x0800),
	MPA_RR_MASK_REVISION = cpu_to_be16(0x00ff)
	};

	/*
	* MPA request/reply header
	*/
	struct mpa_rr {
	__u8 key[16];
	struct mpa_rr_params params;
	};

	static inline void __mpa_rr_set_revision(__be16 *bits, u8 rev)
	{
	bits = (bits & ~MPA_RR_MASK_REVISION) \|
	(cpu_to_be16(rev) & MPA_RR_MASK_REVISION);
	}

	static inline u8 __mpa_rr_revision(__be16 mpa_rr_bits)
	{
	__be16 rev = mpa_rr_bits & MPA_RR_MASK_REVISION;

	return be16_to_cpu(rev);
	}

	enum mpa_v2_ctrl {
	MPA_V2_PEER_TO_PEER = cpu_to_be16(0x8000),
	MPA_V2_ZERO_LENGTH_RTR = cpu_to_be16(0x4000),
	MPA_V2_RDMA_WRITE_RTR = cpu_to_be16(0x8000),
	MPA_V2_RDMA_READ_RTR = cpu_to_be16(0x4000),
	MPA_V2_RDMA_NO_RTR = cpu_to_be16(0x0000),
	MPA_V2_MASK_IRD_ORD = cpu_to_be16(0x3fff)
	};

	struct mpa_v2_data {
	__be16 ird;
	__be16 ord;
	};

	struct mpa_marker {
	__be16 rsvd;
	__be16 fpdu_hmd; /* FPDU header-marker distance (= MPA's FPDUPTR) */
	};

	/*
	* maximum MPA trailer
	*/
	struct mpa_trailer {
	__u8 pad[4];
	__be32 crc;
	};

	#define MPA_HDR_SIZE 2
	#define MPA_CRC_SIZE 4

	/*
	* Common portion of iWARP headers (MPA, DDP, RDMAP)
	* for any FPDU
	*/
	struct iwarp_ctrl {
	__be16 mpa_len;
	__be16 ddp_rdmap_ctrl;
	};

	/*
	* DDP/RDMAP Hdr bits & fields
	*/
	enum {
	DDP_FLAG_TAGGED = cpu_to_be16(0x8000),
	DDP_FLAG_LAST = cpu_to_be16(0x4000),
	DDP_MASK_RESERVED = cpu_to_be16(0x3C00),
	DDP_MASK_VERSION = cpu_to_be16(0x0300),
	RDMAP_MASK_VERSION = cpu_to_be16(0x00C0),
	RDMAP_MASK_RESERVED = cpu_to_be16(0x0030),
	RDMAP_MASK_OPCODE = cpu_to_be16(0x000f)
	};

	static inline u8 __ddp_get_version(struct iwarp_ctrl *ctrl)
	{
	return be16_to_cpu(ctrl->ddp_rdmap_ctrl & DDP_MASK_VERSION) >> 8;
	}

	static inline void __ddp_set_version(struct iwarp_ctrl *ctrl, u8 version)
	{
	ctrl->ddp_rdmap_ctrl =
	(ctrl->ddp_rdmap_ctrl & ~DDP_MASK_VERSION) \|
	(cpu_to_be16((u16)version << 8) & DDP_MASK_VERSION);
	}

	static inline u8 __rdmap_get_version(struct iwarp_ctrl *ctrl)
	{
	__be16 ver = ctrl->ddp_rdmap_ctrl & RDMAP_MASK_VERSION;

	return be16_to_cpu(ver) >> 6;
	}

	static inline void __rdmap_set_version(struct iwarp_ctrl *ctrl, u8 version)
	{
	ctrl->ddp_rdmap_ctrl = (ctrl->ddp_rdmap_ctrl & ~RDMAP_MASK_VERSION) \|
	(cpu_to_be16(version << 6) & RDMAP_MASK_VERSION);
	}

	static inline u8 __rdmap_get_opcode(struct iwarp_ctrl *ctrl)
	{
	return be16_to_cpu(ctrl->ddp_rdmap_ctrl & RDMAP_MASK_OPCODE);
	}

	static inline void __rdmap_set_opcode(struct iwarp_ctrl *ctrl, u8 opcode)
	{
	ctrl->ddp_rdmap_ctrl = (ctrl->ddp_rdmap_ctrl & ~RDMAP_MASK_OPCODE) \|
	(cpu_to_be16(opcode) & RDMAP_MASK_OPCODE);
	}

	struct iwarp_rdma_write {
	struct iwarp_ctrl ctrl;
	__be32 sink_stag;
	__be64 sink_to;
	};

	struct iwarp_rdma_rreq {
	struct iwarp_ctrl ctrl;
	__be32 rsvd;
	__be32 ddp_qn;
	__be32 ddp_msn;
	__be32 ddp_mo;
	__be32 sink_stag;
	__be64 sink_to;
	__be32 read_size;
	__be32 source_stag;
	__be64 source_to;
	};

	struct iwarp_rdma_rresp {
	struct iwarp_ctrl ctrl;
	__be32 sink_stag;
	__be64 sink_to;
	};

	struct iwarp_send {
	struct iwarp_ctrl ctrl;
	__be32 rsvd;
	__be32 ddp_qn;
	__be32 ddp_msn;
	__be32 ddp_mo;
	};

	struct iwarp_send_inv {
	struct iwarp_ctrl ctrl;
	__be32 inval_stag;
	__be32 ddp_qn;
	__be32 ddp_msn;
	__be32 ddp_mo;
	};

	struct iwarp_terminate {
	struct iwarp_ctrl ctrl;
	__be32 rsvd;
	__be32 ddp_qn;
	__be32 ddp_msn;
	__be32 ddp_mo;
	#if defined(__LITTLE_ENDIAN_BITFIELD)
	__be32 layer : 4;
	__be32 etype : 4;
	__be32 ecode : 8;
	__be32 flag_m : 1;
	__be32 flag_d : 1;
	__be32 flag_r : 1;
	__be32 reserved : 13;
	#elif defined(__BIG_ENDIAN_BITFIELD)
	__be32 reserved : 13;
	__be32 flag_r : 1;
	__be32 flag_d : 1;
	__be32 flag_m : 1;
	__be32 ecode : 8;
	__be32 etype : 4;
	__be32 layer : 4;
	#else
	#error "undefined byte order"
	#endif
	};

	/*
	* Terminate Hdr bits & fields
	*/
	enum {
	TERM_MASK_LAYER = cpu_to_be32(0xf0000000),
	TERM_MASK_ETYPE = cpu_to_be32(0x0f000000),
	TERM_MASK_ECODE = cpu_to_be32(0x00ff0000),
	TERM_FLAG_M = cpu_to_be32(0x00008000),
	TERM_FLAG_D = cpu_to_be32(0x00004000),
	TERM_FLAG_R = cpu_to_be32(0x00002000),
	TERM_MASK_RESVD = cpu_to_be32(0x00001fff)
	};

	static inline u8 __rdmap_term_layer(struct iwarp_terminate *term)
	{
	return term->layer;
	}

	static inline void __rdmap_term_set_layer(struct iwarp_terminate *term,
	u8 layer)
	{
	term->layer = layer & 0xf;
	}

	static inline u8 __rdmap_term_etype(struct iwarp_terminate *term)
	{
	return term->etype;
	}

	static inline void __rdmap_term_set_etype(struct iwarp_terminate *term,
	u8 etype)
	{
	term->etype = etype & 0xf;
	}

	static inline u8 __rdmap_term_ecode(struct iwarp_terminate *term)
	{
	return term->ecode;
	}

	static inline void __rdmap_term_set_ecode(struct iwarp_terminate *term,
	u8 ecode)
	{
	term->ecode = ecode;
	}

	/*
	* Common portion of iWARP headers (MPA, DDP, RDMAP)
	* for an FPDU carrying an untagged DDP segment
	*/
	struct iwarp_ctrl_untagged {
	struct iwarp_ctrl ctrl;
	__be32 rsvd;
	__be32 ddp_qn;
	__be32 ddp_msn;
	__be32 ddp_mo;
	};

	/*
	* Common portion of iWARP headers (MPA, DDP, RDMAP)
	* for an FPDU carrying a tagged DDP segment
	*/
	struct iwarp_ctrl_tagged {
	struct iwarp_ctrl ctrl;
	__be32 ddp_stag;
	__be64 ddp_to;
	};

	union iwarp_hdr {
	struct iwarp_ctrl ctrl;
	struct iwarp_ctrl_untagged c_untagged;
	struct iwarp_ctrl_tagged c_tagged;
	struct iwarp_rdma_write rwrite;
	struct iwarp_rdma_rreq rreq;
	struct iwarp_rdma_rresp rresp;
	struct iwarp_terminate terminate;
	struct iwarp_send send;
	struct iwarp_send_inv send_inv;
	};

	enum term_elayer {
	TERM_ERROR_LAYER_RDMAP = 0x00,
	TERM_ERROR_LAYER_DDP = 0x01,
	TERM_ERROR_LAYER_LLP = 0x02 /* eg., MPA */
	};

	enum ddp_etype {
	DDP_ETYPE_CATASTROPHIC = 0x0,
	DDP_ETYPE_TAGGED_BUF = 0x1,
	DDP_ETYPE_UNTAGGED_BUF = 0x2,
	DDP_ETYPE_RSVD = 0x3
	};

	enum ddp_ecode {
	/* unspecified, set to zero */
	DDP_ECODE_CATASTROPHIC = 0x00,
	/* Tagged Buffer Errors */
	DDP_ECODE_T_INVALID_STAG = 0x00,
	DDP_ECODE_T_BASE_BOUNDS = 0x01,
	DDP_ECODE_T_STAG_NOT_ASSOC = 0x02,
	DDP_ECODE_T_TO_WRAP = 0x03,
	DDP_ECODE_T_VERSION = 0x04,
	/* Untagged Buffer Errors */
	DDP_ECODE_UT_INVALID_QN = 0x01,
	DDP_ECODE_UT_INVALID_MSN_NOBUF = 0x02,
	DDP_ECODE_UT_INVALID_MSN_RANGE = 0x03,
	DDP_ECODE_UT_INVALID_MO = 0x04,
	DDP_ECODE_UT_MSG_TOOLONG = 0x05,
	DDP_ECODE_UT_VERSION = 0x06
	};

	enum rdmap_untagged_qn {
	RDMAP_UNTAGGED_QN_SEND = 0,
	RDMAP_UNTAGGED_QN_RDMA_READ = 1,
	RDMAP_UNTAGGED_QN_TERMINATE = 2,
	RDMAP_UNTAGGED_QN_COUNT = 3
	};

	enum rdmap_etype {
	RDMAP_ETYPE_CATASTROPHIC = 0x0,
	RDMAP_ETYPE_REMOTE_PROTECTION = 0x1,
	RDMAP_ETYPE_REMOTE_OPERATION = 0x2
	};

	enum rdmap_ecode {
	RDMAP_ECODE_INVALID_STAG = 0x00,
	RDMAP_ECODE_BASE_BOUNDS = 0x01,
	RDMAP_ECODE_ACCESS_RIGHTS = 0x02,
	RDMAP_ECODE_STAG_NOT_ASSOC = 0x03,
	RDMAP_ECODE_TO_WRAP = 0x04,
	RDMAP_ECODE_VERSION = 0x05,
	RDMAP_ECODE_OPCODE = 0x06,
	RDMAP_ECODE_CATASTROPHIC_STREAM = 0x07,
	RDMAP_ECODE_CATASTROPHIC_GLOBAL = 0x08,
	RDMAP_ECODE_CANNOT_INVALIDATE = 0x09,
	RDMAP_ECODE_UNSPECIFIED = 0xff
	};

	enum llp_ecode {
	LLP_ECODE_TCP_STREAM_LOST = 0x01, /* How to transfer this ?? */
	LLP_ECODE_RECEIVED_CRC = 0x02,
	LLP_ECODE_FPDU_START = 0x03,
	LLP_ECODE_INVALID_REQ_RESP = 0x04,

	/* Errors for Enhanced Connection Establishment only */
	LLP_ECODE_LOCAL_CATASTROPHIC = 0x05,
	LLP_ECODE_INSUFFICIENT_IRD = 0x06,
	LLP_ECODE_NO_MATCHING_RTR = 0x07
	};

	enum llp_etype { LLP_ETYPE_MPA = 0x00 };

	enum rdma_opcode {
	RDMAP_RDMA_WRITE = 0x0,
	RDMAP_RDMA_READ_REQ = 0x1,
	RDMAP_RDMA_READ_RESP = 0x2,
	RDMAP_SEND = 0x3,
	RDMAP_SEND_INVAL = 0x4,
	RDMAP_SEND_SE = 0x5,
	RDMAP_SEND_SE_INVAL = 0x6,
	RDMAP_TERMINATE = 0x7,
	RDMAP_NOT_SUPPORTED = RDMAP_TERMINATE + 1
	};

	#endif