include/linux/nvme-fc.h - third_party/kernel - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (c) 2016 Avago Technologies.  All rights reserved.
  */

 /*
  * This file contains definitions relative to FC-NVME-2 r1.08
  * (T11-2019-00210-v004).
  */

 #ifndef _NVME_FC_H
 #define _NVME_FC_H 1

 #include <uapi/scsi/fc/fc_fs.h>

 #define NVME_CMD_FORMAT_ID		0xFD
 #define NVME_CMD_FC_ID			FC_TYPE_NVME

 /* FC-NVME Cmd IU Flags */
 enum {
 	FCNVME_CMD_FLAGS_DIRMASK	= 0x03,
 	FCNVME_CMD_FLAGS_WRITE		= (1 << 0),
 	FCNVME_CMD_FLAGS_READ		= (1 << 1),

 	FCNVME_CMD_FLAGS_PICWP		= (1 << 2),
 };

 enum {
 	FCNVME_CMD_CAT_MASK		= 0x0F,
 	FCNVME_CMD_CAT_ADMINQ		= 0x01,
 	FCNVME_CMD_CAT_CSSMASK		= 0x07,
 	FCNVME_CMD_CAT_CSSFLAG		= 0x08,
 };

 static inline __u8 fccmnd_set_cat_admin(__u8 rsv_cat)
 {
 	return (rsv_cat & ~FCNVME_CMD_CAT_MASK) | FCNVME_CMD_CAT_ADMINQ;
 }

 static inline __u8 fccmnd_set_cat_css(__u8 rsv_cat, __u8 css)
 {
 	return (rsv_cat & ~FCNVME_CMD_CAT_MASK) | FCNVME_CMD_CAT_CSSFLAG |
 		(css & FCNVME_CMD_CAT_CSSMASK);
 }

 struct nvme_fc_cmd_iu {
 	__u8			format_id;
 	__u8			fc_id;
 	__be16			iu_len;
 	__u8			rsvd4[2];
 	__u8			rsv_cat;
 	__u8			flags;
 	__be64			connection_id;
 	__be32			csn;
 	__be32			data_len;
 	struct nvme_command	sqe;
 	__u8			dps;
 	__u8			lbads;
 	__be16			ms;
 	__be32			rsvd92;
 };

 #define NVME_FC_SIZEOF_ZEROS_RSP	12

 enum {
 	FCNVME_SC_SUCCESS		= 0,
 	FCNVME_SC_INVALID_FIELD		= 1,
 	/* reserved			  2 */
 	FCNVME_SC_ILL_CONN_PARAMS	= 3,
 };

 struct nvme_fc_ersp_iu {
 	__u8			ersp_result;
 	__u8			rsvd1;
 	__be16			iu_len;
 	__be32			rsn;
 	__be32			xfrd_len;
 	__be32			rsvd12;
 	struct nvme_completion	cqe;
 	/* for now - no additional payload */
 };


 #define FCNVME_NVME_SR_OPCODE		0x01
 #define FCNVME_NVME_SR_RSP_OPCODE	0x02

 struct nvme_fc_nvme_sr_iu {
 	__u8			fc_id;
 	__u8			opcode;
 	__u8			rsvd2;
 	__u8			retry_rctl;
 	__be32			rsvd4;
 };


 enum {
 	FCNVME_SRSTAT_ACC		= 0x0,
 	/* reserved			  0x1 */
 	/* reserved			  0x2 */
 	FCNVME_SRSTAT_LOGICAL_ERR	= 0x3,
 	FCNVME_SRSTAT_INV_QUALIF	= 0x4,
 	FCNVME_SRSTAT_UNABL2PERFORM	= 0x9,
 };

 struct nvme_fc_nvme_sr_rsp_iu {
 	__u8			fc_id;
 	__u8			opcode;
 	__u8			rsvd2;
 	__u8			status;
 	__be32			rsvd4;
 };


 /* FC-NVME Link Services - LS cmd values (w0 bits 31:24) */
 enum {
 	FCNVME_LS_RSVD			= 0,
 	FCNVME_LS_RJT			= 1,
 	FCNVME_LS_ACC			= 2,
 	FCNVME_LS_CREATE_ASSOCIATION	= 3,	/* Create Association */
 	FCNVME_LS_CREATE_CONNECTION	= 4,	/* Create I/O Connection */
 	FCNVME_LS_DISCONNECT_ASSOC	= 5,	/* Disconnect Association */
 	FCNVME_LS_DISCONNECT_CONN	= 6,	/* Disconnect Connection */
 };

 /* FC-NVME Link Service Descriptors */
 enum {
 	FCNVME_LSDESC_RSVD		= 0x0,
 	FCNVME_LSDESC_RQST		= 0x1,
 	FCNVME_LSDESC_RJT		= 0x2,
 	FCNVME_LSDESC_CREATE_ASSOC_CMD	= 0x3,
 	FCNVME_LSDESC_CREATE_CONN_CMD	= 0x4,
 	FCNVME_LSDESC_DISCONN_CMD	= 0x5,
 	FCNVME_LSDESC_CONN_ID		= 0x6,
 	FCNVME_LSDESC_ASSOC_ID		= 0x7,
 };


 /* ********** start of Link Service Descriptors ********** */


 /*
  * fills in length of a descriptor. Struture minus descriptor header
  */
 static inline __be32 fcnvme_lsdesc_len(size_t sz)
 {
 	return cpu_to_be32(sz - (2 * sizeof(u32)));
 }

 struct fcnvme_ls_rqst_w0 {
 	u8	ls_cmd;			/* FCNVME_LS_xxx */
 	u8	zeros[3];
 };

 /* FCNVME_LSDESC_RQST */
 struct fcnvme_lsdesc_rqst {
 	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
 	__be32	desc_len;
 	struct fcnvme_ls_rqst_w0	w0;
 	__be32	rsvd12;
 };

 /* FC-NVME LS RJT reason_code values */
 enum fcnvme_ls_rjt_reason {
 	FCNVME_RJT_RC_NONE		= 0,
 	/* no reason - not to be sent */

 	FCNVME_RJT_RC_INVAL		= 0x01,
 	/* invalid NVMe_LS command code */

 	FCNVME_RJT_RC_LOGIC		= 0x03,
 	/* logical error */

 	FCNVME_RJT_RC_UNAB		= 0x09,
 	/* unable to perform command request */

 	FCNVME_RJT_RC_UNSUP		= 0x0b,
 	/* command not supported */

 	FCNVME_RJT_RC_INV_ASSOC		= 0x40,
 	/* Invalid Association ID */

 	FCNVME_RJT_RC_INV_CONN		= 0x41,
 	/* Invalid Connection ID */

 	FCNVME_RJT_RC_INV_PARAM		= 0x42,
 	/* Invalid Parameters */

 	FCNVME_RJT_RC_INSUF_RES		= 0x43,
 	/* Insufficient Resources */

 	FCNVME_RJT_RC_VENDOR		= 0xff,
 	/* vendor specific error */
 };

 /* FC-NVME LS RJT reason_explanation values */
 enum fcnvme_ls_rjt_explan {
 	FCNVME_RJT_EXP_NONE		= 0x00,
 	/* No additional explanation */

 	FCNVME_RJT_EXP_OXID_RXID	= 0x17,
 	/* invalid OX_ID-RX_ID combination */

 	FCNVME_RJT_EXP_UNAB_DATA	= 0x2a,
 	/* unable to supply requested data */

 	FCNVME_RJT_EXP_INV_LEN		= 0x2d,
 	/* Invalid payload length */

 	FCNVME_RJT_EXP_INV_ERSP_RAT	= 0x40,
 	/* Invalid NVMe_ERSP Ratio */

 	FCNVME_RJT_EXP_INV_CTLR_ID	= 0x41,
 	/* Invalid Controller ID */

 	FCNVME_RJT_EXP_INV_QUEUE_ID	= 0x42,
 	/* Invalid Queue ID */

 	FCNVME_RJT_EXP_INV_SQSIZE	= 0x43,
 	/* Invalid Submission Queue Size */

 	FCNVME_RJT_EXP_INV_HOSTID	= 0x44,
 	/* Invalid HOST ID */

 	FCNVME_RJT_EXP_INV_HOSTNQN	= 0x45,
 	/* Invalid HOSTNQN */

 	FCNVME_RJT_EXP_INV_SUBNQN	= 0x46,
 	/* Invalid SUBNQN */
 };

 /* FCNVME_LSDESC_RJT */
 struct fcnvme_lsdesc_rjt {
 	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
 	__be32	desc_len;
 	u8	rsvd8;

 	/*
 	 * Reject reason and explanaction codes are generic
 	 * to ELs's from LS-3.
 	 */
 	u8	reason_code;		/* fcnvme_ls_rjt_reason */
 	u8	reason_explanation;	/* fcnvme_ls_rjt_explan */

 	u8	vendor;
 	__be32	rsvd12;
 };


 #define FCNVME_ASSOC_HOSTNQN_LEN	256
 #define FCNVME_ASSOC_SUBNQN_LEN		256

 /* FCNVME_LSDESC_CREATE_ASSOC_CMD */
 struct fcnvme_lsdesc_cr_assoc_cmd {
 	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
 	__be32	desc_len;
 	__be16	ersp_ratio;
 	__be16	rsvd10;
 	__be32	rsvd12[9];
 	__be16	cntlid;
 	__be16	sqsize;
 	__be32	rsvd52;
 	uuid_t	hostid;
 	u8	hostnqn[FCNVME_ASSOC_HOSTNQN_LEN];
 	u8	subnqn[FCNVME_ASSOC_SUBNQN_LEN];
 	__be32	rsvd584[108];		/* pad to 1016 bytes,
 					 * which makes overall LS rqst
 					 * payload 1024 bytes
 					 */
 };

 #define FCNVME_LSDESC_CRA_CMD_DESC_MINLEN	\
 		offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, rsvd584)

 #define FCNVME_LSDESC_CRA_CMD_DESC_MIN_DESCLEN	\
 		(FCNVME_LSDESC_CRA_CMD_DESC_MINLEN - \
 		 offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, ersp_ratio))


 /* FCNVME_LSDESC_CREATE_CONN_CMD */
 struct fcnvme_lsdesc_cr_conn_cmd {
 	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
 	__be32	desc_len;
 	__be16	ersp_ratio;
 	__be16	rsvd10;
 	__be32	rsvd12[9];
 	__be16	qid;
 	__be16	sqsize;
 	__be32  rsvd52;
 };

 /* FCNVME_LSDESC_DISCONN_CMD */
 struct fcnvme_lsdesc_disconn_cmd {
 	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
 	__be32	desc_len;
 	__be32	rsvd8[4];
 };

 /* FCNVME_LSDESC_CONN_ID */
 struct fcnvme_lsdesc_conn_id {
 	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
 	__be32	desc_len;
 	__be64	connection_id;
 };

 /* FCNVME_LSDESC_ASSOC_ID */
 struct fcnvme_lsdesc_assoc_id {
 	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
 	__be32	desc_len;
 	__be64	association_id;
 };

 /* r_ctl values */
 enum {
 	FCNVME_RS_RCTL_CMND		= 0x6,
 	FCNVME_RS_RCTL_DATA		= 0x1,
 	FCNVME_RS_RCTL_CONF		= 0x3,
 	FCNVME_RS_RCTL_SR		= 0x9,
 	FCNVME_RS_RCTL_XFER_RDY		= 0x5,
 	FCNVME_RS_RCTL_RSP		= 0x7,
 	FCNVME_RS_RCTL_ERSP		= 0x8,
 	FCNVME_RS_RCTL_SR_RSP		= 0xA,
 };


 /* ********** start of Link Services ********** */


 /* FCNVME_LS_RJT */
 struct fcnvme_ls_rjt {
 	struct fcnvme_ls_rqst_w0		w0;
 	__be32					desc_list_len;
 	struct fcnvme_lsdesc_rqst		rqst;
 	struct fcnvme_lsdesc_rjt		rjt;
 };

 /* FCNVME_LS_ACC */
 struct fcnvme_ls_acc_hdr {
 	struct fcnvme_ls_rqst_w0		w0;
 	__be32					desc_list_len;
 	struct fcnvme_lsdesc_rqst		rqst;
 	/*
 	 * Followed by cmd-specific ACCEPT descriptors, see xxx_acc
 	 * definitions below
 	 */
 };

 /* FCNVME_LS_CREATE_ASSOCIATION */
 struct fcnvme_ls_cr_assoc_rqst {
 	struct fcnvme_ls_rqst_w0		w0;
 	__be32					desc_list_len;
 	struct fcnvme_lsdesc_cr_assoc_cmd	assoc_cmd;
 };

 #define FCNVME_LSDESC_CRA_RQST_MINLEN	\
 		(offsetof(struct fcnvme_ls_cr_assoc_rqst, assoc_cmd) + \
 			FCNVME_LSDESC_CRA_CMD_DESC_MINLEN)

 #define FCNVME_LSDESC_CRA_RQST_MIN_LISTLEN	\
 		FCNVME_LSDESC_CRA_CMD_DESC_MINLEN


 struct fcnvme_ls_cr_assoc_acc {
 	struct fcnvme_ls_acc_hdr		hdr;
 	struct fcnvme_lsdesc_assoc_id		associd;
 	struct fcnvme_lsdesc_conn_id		connectid;
 };


 /* FCNVME_LS_CREATE_CONNECTION */
 struct fcnvme_ls_cr_conn_rqst {
 	struct fcnvme_ls_rqst_w0		w0;
 	__be32					desc_list_len;
 	struct fcnvme_lsdesc_assoc_id		associd;
 	struct fcnvme_lsdesc_cr_conn_cmd	connect_cmd;
 };

 struct fcnvme_ls_cr_conn_acc {
 	struct fcnvme_ls_acc_hdr		hdr;
 	struct fcnvme_lsdesc_conn_id		connectid;
 };

 /* FCNVME_LS_DISCONNECT_ASSOC */
 struct fcnvme_ls_disconnect_assoc_rqst {
 	struct fcnvme_ls_rqst_w0		w0;
 	__be32					desc_list_len;
 	struct fcnvme_lsdesc_assoc_id		associd;
 	struct fcnvme_lsdesc_disconn_cmd	discon_cmd;
 };

 struct fcnvme_ls_disconnect_assoc_acc {
 	struct fcnvme_ls_acc_hdr		hdr;
 };


 /* FCNVME_LS_DISCONNECT_CONN */
 struct fcnvme_ls_disconnect_conn_rqst {
 	struct fcnvme_ls_rqst_w0		w0;
 	__be32					desc_list_len;
 	struct fcnvme_lsdesc_assoc_id		associd;
 	struct fcnvme_lsdesc_conn_id		connectid;
 };

 struct fcnvme_ls_disconnect_conn_acc {
 	struct fcnvme_ls_acc_hdr		hdr;
 };


 /*
  * Default R_A_TOV is pulled in from fc_fs.h but needs conversion
  * from ms to seconds for our use.
  */
 #define FC_TWO_TIMES_R_A_TOV		(2 * (FC_DEF_R_A_TOV / 1000))
 #define NVME_FC_LS_TIMEOUT_SEC		FC_TWO_TIMES_R_A_TOV
 #define NVME_FC_TGTOP_TIMEOUT_SEC	FC_TWO_TIMES_R_A_TOV

 /*
  * TRADDR string must be of form "nn-<16hexdigits>:pn-<16hexdigits>"
  * the string is allowed to be specified with or without a "0x" prefix
  * infront of the <16hexdigits>.  Without is considered the "min" string
  * and with is considered the "max" string. The hexdigits may be upper
  * or lower case.
  * Note: FC-NVME-2 standard requires a "0x" prefix.
  */
 #define NVME_FC_TRADDR_NNLEN		3	/* "?n-" */
 #define NVME_FC_TRADDR_OXNNLEN		5	/* "?n-0x" */
 #define NVME_FC_TRADDR_HEXNAMELEN	16
 #define NVME_FC_TRADDR_MINLENGTH	\
 		(2 * (NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
 #define NVME_FC_TRADDR_MAXLENGTH	\
 		(2 * (NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
 #define NVME_FC_TRADDR_MIN_PN_OFFSET	\
 		(NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)
 #define NVME_FC_TRADDR_MAX_PN_OFFSET	\
 		(NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)


 #endif /* _NVME_FC_H */
	/* SPDX-License-Identifier: GPL-2.0 */
	/*
	* Copyright (c) 2016 Avago Technologies. All rights reserved.
	*/

	/*
	* This file contains definitions relative to FC-NVME-2 r1.08
	* (T11-2019-00210-v004).
	*/

	#ifndef _NVME_FC_H
	#define _NVME_FC_H 1

	#include <uapi/scsi/fc/fc_fs.h>

	#define NVME_CMD_FORMAT_ID 0xFD
	#define NVME_CMD_FC_ID FC_TYPE_NVME

	/* FC-NVME Cmd IU Flags */
	enum {
	FCNVME_CMD_FLAGS_DIRMASK = 0x03,
	FCNVME_CMD_FLAGS_WRITE = (1 << 0),
	FCNVME_CMD_FLAGS_READ = (1 << 1),

	FCNVME_CMD_FLAGS_PICWP = (1 << 2),
	};

	enum {
	FCNVME_CMD_CAT_MASK = 0x0F,
	FCNVME_CMD_CAT_ADMINQ = 0x01,
	FCNVME_CMD_CAT_CSSMASK = 0x07,
	FCNVME_CMD_CAT_CSSFLAG = 0x08,
	};

	static inline __u8 fccmnd_set_cat_admin(__u8 rsv_cat)
	{
	return (rsv_cat & ~FCNVME_CMD_CAT_MASK) \| FCNVME_CMD_CAT_ADMINQ;
	}

	static inline __u8 fccmnd_set_cat_css(__u8 rsv_cat, __u8 css)
	{
	return (rsv_cat & ~FCNVME_CMD_CAT_MASK) \| FCNVME_CMD_CAT_CSSFLAG \|
	(css & FCNVME_CMD_CAT_CSSMASK);
	}

	struct nvme_fc_cmd_iu {
	__u8 format_id;
	__u8 fc_id;
	__be16 iu_len;
	__u8 rsvd4[2];
	__u8 rsv_cat;
	__u8 flags;
	__be64 connection_id;
	__be32 csn;
	__be32 data_len;
	struct nvme_command sqe;
	__u8 dps;
	__u8 lbads;
	__be16 ms;
	__be32 rsvd92;
	};

	#define NVME_FC_SIZEOF_ZEROS_RSP 12

	enum {
	FCNVME_SC_SUCCESS = 0,
	FCNVME_SC_INVALID_FIELD = 1,
	/* reserved 2 */
	FCNVME_SC_ILL_CONN_PARAMS = 3,
	};

	struct nvme_fc_ersp_iu {
	__u8 ersp_result;
	__u8 rsvd1;
	__be16 iu_len;
	__be32 rsn;
	__be32 xfrd_len;
	__be32 rsvd12;
	struct nvme_completion cqe;
	/* for now - no additional payload */
	};


	#define FCNVME_NVME_SR_OPCODE 0x01
	#define FCNVME_NVME_SR_RSP_OPCODE 0x02

	struct nvme_fc_nvme_sr_iu {
	__u8 fc_id;
	__u8 opcode;
	__u8 rsvd2;
	__u8 retry_rctl;
	__be32 rsvd4;
	};


	enum {
	FCNVME_SRSTAT_ACC = 0x0,
	/* reserved 0x1 */
	/* reserved 0x2 */
	FCNVME_SRSTAT_LOGICAL_ERR = 0x3,
	FCNVME_SRSTAT_INV_QUALIF = 0x4,
	FCNVME_SRSTAT_UNABL2PERFORM = 0x9,
	};

	struct nvme_fc_nvme_sr_rsp_iu {
	__u8 fc_id;
	__u8 opcode;
	__u8 rsvd2;
	__u8 status;
	__be32 rsvd4;
	};


	/* FC-NVME Link Services - LS cmd values (w0 bits 31:24) */
	enum {
	FCNVME_LS_RSVD = 0,
	FCNVME_LS_RJT = 1,
	FCNVME_LS_ACC = 2,
	FCNVME_LS_CREATE_ASSOCIATION = 3, /* Create Association */
	FCNVME_LS_CREATE_CONNECTION = 4, /* Create I/O Connection */
	FCNVME_LS_DISCONNECT_ASSOC = 5, /* Disconnect Association */
	FCNVME_LS_DISCONNECT_CONN = 6, /* Disconnect Connection */
	};

	/* FC-NVME Link Service Descriptors */
	enum {
	FCNVME_LSDESC_RSVD = 0x0,
	FCNVME_LSDESC_RQST = 0x1,
	FCNVME_LSDESC_RJT = 0x2,
	FCNVME_LSDESC_CREATE_ASSOC_CMD = 0x3,
	FCNVME_LSDESC_CREATE_CONN_CMD = 0x4,
	FCNVME_LSDESC_DISCONN_CMD = 0x5,
	FCNVME_LSDESC_CONN_ID = 0x6,
	FCNVME_LSDESC_ASSOC_ID = 0x7,
	};


	/* ******** start of Link Service Descriptors ******** */


	/*
	* fills in length of a descriptor. Struture minus descriptor header
	*/
	static inline __be32 fcnvme_lsdesc_len(size_t sz)
	{
	return cpu_to_be32(sz - (2 * sizeof(u32)));
	}

	struct fcnvme_ls_rqst_w0 {
	u8 ls_cmd; /* FCNVME_LS_xxx */
	u8 zeros[3];
	};

	/* FCNVME_LSDESC_RQST */
	struct fcnvme_lsdesc_rqst {
	__be32 desc_tag; /* FCNVME_LSDESC_xxx */
	__be32 desc_len;
	struct fcnvme_ls_rqst_w0 w0;
	__be32 rsvd12;
	};

	/* FC-NVME LS RJT reason_code values */
	enum fcnvme_ls_rjt_reason {
	FCNVME_RJT_RC_NONE = 0,
	/* no reason - not to be sent */

	FCNVME_RJT_RC_INVAL = 0x01,
	/* invalid NVMe_LS command code */

	FCNVME_RJT_RC_LOGIC = 0x03,
	/* logical error */

	FCNVME_RJT_RC_UNAB = 0x09,
	/* unable to perform command request */

	FCNVME_RJT_RC_UNSUP = 0x0b,
	/* command not supported */

	FCNVME_RJT_RC_INV_ASSOC = 0x40,
	/* Invalid Association ID */

	FCNVME_RJT_RC_INV_CONN = 0x41,
	/* Invalid Connection ID */

	FCNVME_RJT_RC_INV_PARAM = 0x42,
	/* Invalid Parameters */

	FCNVME_RJT_RC_INSUF_RES = 0x43,
	/* Insufficient Resources */

	FCNVME_RJT_RC_VENDOR = 0xff,
	/* vendor specific error */
	};

	/* FC-NVME LS RJT reason_explanation values */
	enum fcnvme_ls_rjt_explan {
	FCNVME_RJT_EXP_NONE = 0x00,
	/* No additional explanation */

	FCNVME_RJT_EXP_OXID_RXID = 0x17,
	/* invalid OX_ID-RX_ID combination */

	FCNVME_RJT_EXP_UNAB_DATA = 0x2a,
	/* unable to supply requested data */

	FCNVME_RJT_EXP_INV_LEN = 0x2d,
	/* Invalid payload length */

	FCNVME_RJT_EXP_INV_ERSP_RAT = 0x40,
	/* Invalid NVMe_ERSP Ratio */

	FCNVME_RJT_EXP_INV_CTLR_ID = 0x41,
	/* Invalid Controller ID */

	FCNVME_RJT_EXP_INV_QUEUE_ID = 0x42,
	/* Invalid Queue ID */

	FCNVME_RJT_EXP_INV_SQSIZE = 0x43,
	/* Invalid Submission Queue Size */

	FCNVME_RJT_EXP_INV_HOSTID = 0x44,
	/* Invalid HOST ID */

	FCNVME_RJT_EXP_INV_HOSTNQN = 0x45,
	/* Invalid HOSTNQN */

	FCNVME_RJT_EXP_INV_SUBNQN = 0x46,
	/* Invalid SUBNQN */
	};

	/* FCNVME_LSDESC_RJT */
	struct fcnvme_lsdesc_rjt {
	__be32 desc_tag; /* FCNVME_LSDESC_xxx */
	__be32 desc_len;
	u8 rsvd8;

	/*
	* Reject reason and explanaction codes are generic
	* to ELs's from LS-3.
	*/
	u8 reason_code; /* fcnvme_ls_rjt_reason */
	u8 reason_explanation; /* fcnvme_ls_rjt_explan */

	u8 vendor;
	__be32 rsvd12;
	};


	#define FCNVME_ASSOC_HOSTNQN_LEN 256
	#define FCNVME_ASSOC_SUBNQN_LEN 256

	/* FCNVME_LSDESC_CREATE_ASSOC_CMD */
	struct fcnvme_lsdesc_cr_assoc_cmd {
	__be32 desc_tag; /* FCNVME_LSDESC_xxx */
	__be32 desc_len;
	__be16 ersp_ratio;
	__be16 rsvd10;
	__be32 rsvd12[9];
	__be16 cntlid;
	__be16 sqsize;
	__be32 rsvd52;
	uuid_t hostid;
	u8 hostnqn[FCNVME_ASSOC_HOSTNQN_LEN];
	u8 subnqn[FCNVME_ASSOC_SUBNQN_LEN];
	__be32 rsvd584[108]; /* pad to 1016 bytes,
	* which makes overall LS rqst
	* payload 1024 bytes
	*/
	};

	#define FCNVME_LSDESC_CRA_CMD_DESC_MINLEN \
	offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, rsvd584)

	#define FCNVME_LSDESC_CRA_CMD_DESC_MIN_DESCLEN \
	(FCNVME_LSDESC_CRA_CMD_DESC_MINLEN - \
	offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, ersp_ratio))



	/* FCNVME_LSDESC_CREATE_CONN_CMD */
	struct fcnvme_lsdesc_cr_conn_cmd {
	__be32 desc_tag; /* FCNVME_LSDESC_xxx */
	__be32 desc_len;
	__be16 ersp_ratio;
	__be16 rsvd10;
	__be32 rsvd12[9];
	__be16 qid;
	__be16 sqsize;
	__be32 rsvd52;
	};

	/* FCNVME_LSDESC_DISCONN_CMD */
	struct fcnvme_lsdesc_disconn_cmd {
	__be32 desc_tag; /* FCNVME_LSDESC_xxx */
	__be32 desc_len;
	__be32 rsvd8[4];
	};

	/* FCNVME_LSDESC_CONN_ID */
	struct fcnvme_lsdesc_conn_id {
	__be32 desc_tag; /* FCNVME_LSDESC_xxx */
	__be32 desc_len;
	__be64 connection_id;
	};

	/* FCNVME_LSDESC_ASSOC_ID */
	struct fcnvme_lsdesc_assoc_id {
	__be32 desc_tag; /* FCNVME_LSDESC_xxx */
	__be32 desc_len;
	__be64 association_id;
	};

	/* r_ctl values */
	enum {
	FCNVME_RS_RCTL_CMND = 0x6,
	FCNVME_RS_RCTL_DATA = 0x1,
	FCNVME_RS_RCTL_CONF = 0x3,
	FCNVME_RS_RCTL_SR = 0x9,
	FCNVME_RS_RCTL_XFER_RDY = 0x5,
	FCNVME_RS_RCTL_RSP = 0x7,
	FCNVME_RS_RCTL_ERSP = 0x8,
	FCNVME_RS_RCTL_SR_RSP = 0xA,
	};


	/* ******** start of Link Services ******** */


	/* FCNVME_LS_RJT */
	struct fcnvme_ls_rjt {
	struct fcnvme_ls_rqst_w0 w0;
	__be32 desc_list_len;
	struct fcnvme_lsdesc_rqst rqst;
	struct fcnvme_lsdesc_rjt rjt;
	};

	/* FCNVME_LS_ACC */
	struct fcnvme_ls_acc_hdr {
	struct fcnvme_ls_rqst_w0 w0;
	__be32 desc_list_len;
	struct fcnvme_lsdesc_rqst rqst;
	/*
	* Followed by cmd-specific ACCEPT descriptors, see xxx_acc
	* definitions below
	*/
	};

	/* FCNVME_LS_CREATE_ASSOCIATION */
	struct fcnvme_ls_cr_assoc_rqst {
	struct fcnvme_ls_rqst_w0 w0;
	__be32 desc_list_len;
	struct fcnvme_lsdesc_cr_assoc_cmd assoc_cmd;
	};

	#define FCNVME_LSDESC_CRA_RQST_MINLEN \
	(offsetof(struct fcnvme_ls_cr_assoc_rqst, assoc_cmd) + \
	FCNVME_LSDESC_CRA_CMD_DESC_MINLEN)

	#define FCNVME_LSDESC_CRA_RQST_MIN_LISTLEN \
	FCNVME_LSDESC_CRA_CMD_DESC_MINLEN


	struct fcnvme_ls_cr_assoc_acc {
	struct fcnvme_ls_acc_hdr hdr;
	struct fcnvme_lsdesc_assoc_id associd;
	struct fcnvme_lsdesc_conn_id connectid;
	};


	/* FCNVME_LS_CREATE_CONNECTION */
	struct fcnvme_ls_cr_conn_rqst {
	struct fcnvme_ls_rqst_w0 w0;
	__be32 desc_list_len;
	struct fcnvme_lsdesc_assoc_id associd;
	struct fcnvme_lsdesc_cr_conn_cmd connect_cmd;
	};

	struct fcnvme_ls_cr_conn_acc {
	struct fcnvme_ls_acc_hdr hdr;
	struct fcnvme_lsdesc_conn_id connectid;
	};

	/* FCNVME_LS_DISCONNECT_ASSOC */
	struct fcnvme_ls_disconnect_assoc_rqst {
	struct fcnvme_ls_rqst_w0 w0;
	__be32 desc_list_len;
	struct fcnvme_lsdesc_assoc_id associd;
	struct fcnvme_lsdesc_disconn_cmd discon_cmd;
	};

	struct fcnvme_ls_disconnect_assoc_acc {
	struct fcnvme_ls_acc_hdr hdr;
	};


	/* FCNVME_LS_DISCONNECT_CONN */
	struct fcnvme_ls_disconnect_conn_rqst {
	struct fcnvme_ls_rqst_w0 w0;
	__be32 desc_list_len;
	struct fcnvme_lsdesc_assoc_id associd;
	struct fcnvme_lsdesc_conn_id connectid;
	};

	struct fcnvme_ls_disconnect_conn_acc {
	struct fcnvme_ls_acc_hdr hdr;
	};


	/*
	* Default R_A_TOV is pulled in from fc_fs.h but needs conversion
	* from ms to seconds for our use.
	*/
	#define FC_TWO_TIMES_R_A_TOV (2 * (FC_DEF_R_A_TOV / 1000))
	#define NVME_FC_LS_TIMEOUT_SEC FC_TWO_TIMES_R_A_TOV
	#define NVME_FC_TGTOP_TIMEOUT_SEC FC_TWO_TIMES_R_A_TOV

	/*
	* TRADDR string must be of form "nn-<16hexdigits>:pn-<16hexdigits>"
	* the string is allowed to be specified with or without a "0x" prefix
	* infront of the <16hexdigits>. Without is considered the "min" string
	* and with is considered the "max" string. The hexdigits may be upper
	* or lower case.
	* Note: FC-NVME-2 standard requires a "0x" prefix.
	*/
	#define NVME_FC_TRADDR_NNLEN 3 /* "?n-" */
	#define NVME_FC_TRADDR_OXNNLEN 5 /* "?n-0x" */
	#define NVME_FC_TRADDR_HEXNAMELEN 16
	#define NVME_FC_TRADDR_MINLENGTH \
	(2 * (NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
	#define NVME_FC_TRADDR_MAXLENGTH \
	(2 * (NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
	#define NVME_FC_TRADDR_MIN_PN_OFFSET \
	(NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)
	#define NVME_FC_TRADDR_MAX_PN_OFFSET \
	(NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)


	#endif /* _NVME_FC_H */