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fc_fs.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Copyright(c) 2007 Intel Corporation. All rights reserved.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Maintained at www.Open-FCoE.org
 */

#ifndef _FC_FS_H_
#define _FC_FS_H_

#include <linux/types.h>

/*
 * Fibre Channel Framing and Signalling definitions.
 * From T11 FC-FS-2 Rev 0.90 - 9 August 2005.
 */

/*
 * Frame header
 */
struct fc_frame_header {
	__u8          fh_r_ctl;	/* routing control */
	__u8          fh_d_id[3];	/* Destination ID */

__u8          fh_cs_ctl;	/* class of service control / pri */
	__u8          fh_s_id[3];	/* Source ID */

__u8          fh_type;		/* see enum fc_fh_type below */
	__u8          fh_f_ctl[3];	/* frame control */

__u8          fh_seq_id;	/* sequence ID */
	__u8          fh_df_ctl;	/* data field control */
	__be16        fh_seq_cnt;	/* sequence count */

__be16        fh_ox_id;		/* originator exchange ID */
	__be16        fh_rx_id;		/* responder exchange ID */
	__be32        fh_parm_offset;	/* parameter or relative offset */
};

#define FC_FRAME_HEADER_LEN 24	/* expected length of structure */

#define FC_MAX_PAYLOAD  2112U		/* max payload length in bytes */
#define FC_MIN_MAX_PAYLOAD  256U 	/* lower limit on max payload */

#define FC_MAX_FRAME	(FC_MAX_PAYLOAD + FC_FRAME_HEADER_LEN)
#define FC_MIN_MAX_FRAME (FC_MIN_MAX_PAYLOAD + FC_FRAME_HEADER_LEN)

/*
 * fh_r_ctl - Routing control definitions.
 */
    /*
     * FC-4 device_data.
     */
enum fc_rctl {
	FC_RCTL_DD_UNCAT = 0x00,	/* uncategorized information */
	FC_RCTL_DD_SOL_DATA = 0x01,	/* solicited data */
	FC_RCTL_DD_UNSOL_CTL = 0x02,	/* unsolicited control */
	FC_RCTL_DD_SOL_CTL = 0x03,	/* solicited control or reply */
	FC_RCTL_DD_UNSOL_DATA = 0x04,	/* unsolicited data */
	FC_RCTL_DD_DATA_DESC = 0x05,	/* data descriptor */
	FC_RCTL_DD_UNSOL_CMD = 0x06,	/* unsolicited command */
	FC_RCTL_DD_CMD_STATUS = 0x07,	/* command status */

#define FC_RCTL_ILS_REQ FC_RCTL_DD_UNSOL_CTL	/* ILS request */
#define FC_RCTL_ILS_REP FC_RCTL_DD_SOL_CTL	/* ILS reply */

/*
	 * Extended Link_Data
	 */
	FC_RCTL_ELS_REQ = 0x22,	/* extended link services request */
	FC_RCTL_ELS_REP = 0x23,	/* extended link services reply */
	FC_RCTL_ELS4_REQ = 0x32, /* FC-4 ELS request */
	FC_RCTL_ELS4_REP = 0x33, /* FC-4 ELS reply */
	/*
	 * Optional Extended Headers
	 */
	FC_RCTL_VFTH = 0x50,	/* virtual fabric tagging header */
	FC_RCTL_IFRH = 0x51,	/* inter-fabric routing header */
	FC_RCTL_ENCH = 0x52,	/* encapsulation header */
	/*
	 * Basic Link Services fh_r_ctl values.
	 */
	FC_RCTL_BA_NOP = 0x80,	/* basic link service NOP */
	FC_RCTL_BA_ABTS = 0x81,	/* basic link service abort */
	FC_RCTL_BA_RMC = 0x82,	/* remove connection */
	FC_RCTL_BA_ACC = 0x84,	/* basic accept */
	FC_RCTL_BA_RJT = 0x85,	/* basic reject */
	FC_RCTL_BA_PRMT = 0x86,	/* dedicated connection preempted */
	/*
	 * Link Control Information.
	 */
	FC_RCTL_ACK_1 = 0xc0,	/* acknowledge_1 */
	FC_RCTL_ACK_0 = 0xc1,	/* acknowledge_0 */
	FC_RCTL_P_RJT = 0xc2,	/* port reject */
	FC_RCTL_F_RJT = 0xc3,	/* fabric reject */
	FC_RCTL_P_BSY = 0xc4,	/* port busy */
	FC_RCTL_F_BSY = 0xc5,	/* fabric busy to data frame */
	FC_RCTL_F_BSYL = 0xc6,	/* fabric busy to link control frame */
	FC_RCTL_LCR = 0xc7,	/* link credit reset */
	FC_RCTL_END = 0xc9,	/* end */
};
				    /* incomplete list of definitions */

/*
 * R_CTL names initializer.
 * Please keep this matching the above definitions.
 */
#define FC_RCTL_NAMES_INIT { \
	[FC_RCTL_DD_UNCAT] =		"uncat",			\
	[FC_RCTL_DD_SOL_DATA] =		"sol data",			\
	[FC_RCTL_DD_UNSOL_CTL] =	"unsol ctl",			\
	[FC_RCTL_DD_SOL_CTL] =		"sol ctl/reply",		\
	[FC_RCTL_DD_UNSOL_DATA] =	"unsol data",			\
	[FC_RCTL_DD_DATA_DESC] =	"data desc",			\
	[FC_RCTL_DD_UNSOL_CMD] =	"unsol cmd",			\
	[FC_RCTL_DD_CMD_STATUS] =	"cmd status",			\
	[FC_RCTL_ELS_REQ] =		"ELS req",			\
	[FC_RCTL_ELS_REP] =		"ELS rep",			\
	[FC_RCTL_ELS4_REQ] =		"FC-4 ELS req",			\
	[FC_RCTL_ELS4_REP] =		"FC-4 ELS rep",			\
	[FC_RCTL_BA_NOP] =		"BLS NOP",			\
	[FC_RCTL_BA_ABTS] =		"BLS abort",			\
	[FC_RCTL_BA_RMC] =		"BLS remove connection",	\
	[FC_RCTL_BA_ACC] =		"BLS accept",			\
	[FC_RCTL_BA_RJT] =		"BLS reject",			\
	[FC_RCTL_BA_PRMT] =		"BLS dedicated connection preempted", \
	[FC_RCTL_ACK_1] =		"LC ACK_1",			\
	[FC_RCTL_ACK_0] =		"LC ACK_0",			\
	[FC_RCTL_P_RJT] =		"LC port reject",		\
	[FC_RCTL_F_RJT] =		"LC fabric reject",		\
	[FC_RCTL_P_BSY] =		"LC port busy",			\
	[FC_RCTL_F_BSY] =		"LC fabric busy to data frame",	\
	[FC_RCTL_F_BSYL] =		"LC fabric busy to link control frame",\
	[FC_RCTL_LCR] =			"LC link credit reset",		\
	[FC_RCTL_END] =			"LC end",			\
}

/*
 * Well-known fabric addresses.
 */
enum fc_well_known_fid {
	FC_FID_NONE =           0x000000,       /* No destination */
	FC_FID_BCAST =		0xffffff,	/* broadcast */
	FC_FID_FLOGI =		0xfffffe,	/* fabric login */
	FC_FID_FCTRL =		0xfffffd,	/* fabric controller */
	FC_FID_DIR_SERV =	0xfffffc,	/* directory server */
	FC_FID_TIME_SERV =	0xfffffb,	/* time server */
	FC_FID_MGMT_SERV =	0xfffffa,	/* management server */
	FC_FID_QOS =		0xfffff9,	/* QoS Facilitator */
	FC_FID_ALIASES =	0xfffff8,	/* alias server (FC-PH2) */
	FC_FID_SEC_KEY =	0xfffff7,	/* Security key dist. server */
	FC_FID_CLOCK =		0xfffff6,	/* clock synch server */
	FC_FID_MCAST_SERV =	0xfffff5,	/* multicast server */
};

#define	FC_FID_WELL_KNOWN_MAX	0xffffff /* highest well-known fabric ID */
#define	FC_FID_WELL_KNOWN_BASE	0xfffff5 /* start of well-known fabric ID */

/*
 * Other well-known addresses, outside the above contiguous range.
 */
#define	FC_FID_DOM_MGR		0xfffc00	/* domain manager base */

/*
 * Fabric ID bytes.
 */
#define	FC_FID_DOMAIN		0
#define	FC_FID_PORT		1
#define	FC_FID_LINK		2

/*
 * fh_type codes
 */
enum fc_fh_type {
	FC_TYPE_BLS =	0x00,	/* basic link service */
	FC_TYPE_ELS =	0x01,	/* extended link service */
	FC_TYPE_IP =	0x05,	/* IP over FC, RFC 4338 */
	FC_TYPE_FCP =	0x08,	/* SCSI FCP */
	FC_TYPE_CT =	0x20,	/* Fibre Channel Services (FC-CT) */
	FC_TYPE_ILS =	0x22,	/* internal link service */
	FC_TYPE_NVME =	0x28,	/* FC-NVME */
};

/*
 * FC_TYPE names initializer.
 * Please keep this matching the above definitions.
 */
#define FC_TYPE_NAMES_INIT {				\
	[FC_TYPE_BLS] =		"BLS",			\
	[FC_TYPE_ELS] =		"ELS",			\
	[FC_TYPE_IP] =		"IP",			\
	[FC_TYPE_FCP] =		"FCP",			\
	[FC_TYPE_CT] =		"CT",			\
	[FC_TYPE_ILS] =		"ILS",			\
	[FC_TYPE_NVME] =	"NVME",			\
}

/*
 * Exchange IDs.
 */
#define FC_XID_UNKNOWN  0xffff	/* unknown exchange ID */
#define FC_XID_MIN	0x0	/* supported min exchange ID */
#define FC_XID_MAX	0xfffe	/* supported max exchange ID */

/*
 * fh_f_ctl - Frame control flags.
 */
#define	FC_FC_EX_CTX	(1 << 23)	/* sent by responder to exchange */
#define	FC_FC_SEQ_CTX	(1 << 22)	/* sent by responder to sequence */
#define	FC_FC_FIRST_SEQ (1 << 21)	/* first sequence of this exchange */
#define	FC_FC_LAST_SEQ	(1 << 20)	/* last sequence of this exchange */
#define	FC_FC_END_SEQ	(1 << 19)	/* last frame of sequence */
#define	FC_FC_END_CONN	(1 << 18)	/* end of class 1 connection pending */
#define	FC_FC_RES_B17	(1 << 17)	/* reserved */
#define	FC_FC_SEQ_INIT	(1 << 16)	/* transfer of sequence initiative */
#define	FC_FC_X_ID_REASS (1 << 15)	/* exchange ID has been changed */
#define	FC_FC_X_ID_INVAL (1 << 14)	/* exchange ID invalidated */

#define	FC_FC_ACK_1	(1 << 12)	/* 13:12 = 1: ACK_1 expected */
#define	FC_FC_ACK_N	(2 << 12)	/* 13:12 = 2: ACK_N expected */
#define	FC_FC_ACK_0	(3 << 12)	/* 13:12 = 3: ACK_0 expected */

#define	FC_FC_RES_B11	(1 << 11)	/* reserved */
#define	FC_FC_RES_B10	(1 << 10)	/* reserved */
#define	FC_FC_RETX_SEQ	(1 << 9)	/* retransmitted sequence */
#define	FC_FC_UNI_TX	(1 << 8)	/* unidirectional transmit (class 1) */
#define	FC_FC_CONT_SEQ(i) ((i) << 6)
#define	FC_FC_ABT_SEQ(i) ((i) << 4)
#define	FC_FC_REL_OFF	(1 << 3)	/* parameter is relative offset */
#define	FC_FC_RES2	(1 << 2)	/* reserved */
#define	FC_FC_FILL(i)	((i) & 3)	/* 1:0: bytes of trailing fill */

/*
 * BA_ACC payload.
 */
struct fc_ba_acc {
	__u8		ba_seq_id_val;	/* SEQ_ID validity */
#define FC_BA_SEQ_ID_VAL 0x80
	__u8		ba_seq_id;	/* SEQ_ID of seq last deliverable */
	__u8		ba_resvd[2];	/* reserved */
	__be16		ba_ox_id;	/* OX_ID for aborted seq or exch */
	__be16		ba_rx_id;	/* RX_ID for aborted seq or exch */
	__be16		ba_low_seq_cnt;	/* low SEQ_CNT of aborted seq */
	__be16		ba_high_seq_cnt; /* high SEQ_CNT of aborted seq */
};

/*
 * BA_RJT: Basic Reject payload.
 */
struct fc_ba_rjt {
	__u8		br_resvd;	/* reserved */
	__u8		br_reason;	/* reason code */
	__u8		br_explan;	/* reason explanation */
	__u8		br_vendor;	/* vendor unique code */
};

/*
 * BA_RJT reason codes.
 * From FS-2.
 */
enum fc_ba_rjt_reason {
	FC_BA_RJT_NONE =	0,	/* in software this means no reject */
	FC_BA_RJT_INVL_CMD =	0x01,	/* invalid command code */
	FC_BA_RJT_LOG_ERR =	0x03,	/* logical error */
	FC_BA_RJT_LOG_BUSY =	0x05,	/* logical busy */
	FC_BA_RJT_PROTO_ERR =	0x07,	/* protocol error */
	FC_BA_RJT_UNABLE =	0x09,	/* unable to perform request */
	FC_BA_RJT_VENDOR =	0xff,	/* vendor-specific (see br_vendor) */
};

/*
 * BA_RJT reason code explanations.
 */
enum fc_ba_rjt_explan {
	FC_BA_RJT_EXP_NONE =	0x00,	/* no additional expanation */
	FC_BA_RJT_INV_XID =	0x03,	/* invalid OX_ID-RX_ID combination */
	FC_BA_RJT_ABT =		0x05,	/* sequence aborted, no seq info */
};

/*
 * P_RJT or F_RJT: Port Reject or Fabric Reject parameter field.
 */
struct fc_pf_rjt {
	__u8		rj_action;	/* reserved */
	__u8		rj_reason;	/* reason code */
	__u8		rj_resvd;	/* reserved */
	__u8		rj_vendor;	/* vendor unique code */
};

/*
 * P_RJT and F_RJT reject reason codes.
 */
enum fc_pf_rjt_reason {
	FC_RJT_NONE =		0,	/* non-reject (reserved by standard) */
	FC_RJT_INVL_DID =	0x01,	/* invalid destination ID */
	FC_RJT_INVL_SID =	0x02,	/* invalid source ID */
	FC_RJT_P_UNAV_T =	0x03,	/* port unavailable, temporary */
	FC_RJT_P_UNAV =		0x04,	/* port unavailable, permanent */
	FC_RJT_CLS_UNSUP =	0x05,	/* class not supported */
	FC_RJT_DEL_USAGE =	0x06,	/* delimiter usage error */
	FC_RJT_TYPE_UNSUP =	0x07,	/* type not supported */
	FC_RJT_LINK_CTL =	0x08,	/* invalid link control */
	FC_RJT_R_CTL =		0x09,	/* invalid R_CTL field */
	FC_RJT_F_CTL =		0x0a,	/* invalid F_CTL field */
	FC_RJT_OX_ID =		0x0b,	/* invalid originator exchange ID */
	FC_RJT_RX_ID =		0x0c,	/* invalid responder exchange ID */
	FC_RJT_SEQ_ID =		0x0d,	/* invalid sequence ID */
	FC_RJT_DF_CTL =		0x0e,	/* invalid DF_CTL field */
	FC_RJT_SEQ_CNT =	0x0f,	/* invalid SEQ_CNT field */
	FC_RJT_PARAM =		0x10,	/* invalid parameter field */
	FC_RJT_EXCH_ERR =	0x11,	/* exchange error */
	FC_RJT_PROTO =		0x12,	/* protocol error */
	FC_RJT_LEN =		0x13,	/* incorrect length */
	FC_RJT_UNEXP_ACK =	0x14,	/* unexpected ACK */
	FC_RJT_FAB_CLASS =	0x15,	/* class unsupported by fabric entity */
	FC_RJT_LOGI_REQ =	0x16,	/* login required */
	FC_RJT_SEQ_XS =		0x17,	/* excessive sequences attempted */
	FC_RJT_EXCH_EST =	0x18,	/* unable to establish exchange */
	FC_RJT_FAB_UNAV =	0x1a,	/* fabric unavailable */
	FC_RJT_VC_ID =		0x1b,	/* invalid VC_ID (class 4) */
	FC_RJT_CS_CTL =		0x1c,	/* invalid CS_CTL field */
	FC_RJT_INSUF_RES =	0x1d,	/* insuff. resources for VC (Class 4) */
	FC_RJT_INVL_CLS =	0x1f,	/* invalid class of service */
	FC_RJT_PREEMT_RJT =	0x20,	/* preemption request rejected */
	FC_RJT_PREEMT_DIS =	0x21,	/* preemption not enabled */
	FC_RJT_MCAST_ERR =	0x22,	/* multicast error */
	FC_RJT_MCAST_ET =	0x23,	/* multicast error terminate */
	FC_RJT_PRLI_REQ =	0x24,	/* process login required */
	FC_RJT_INVL_ATT =	0x25,	/* invalid attachment */
	FC_RJT_VENDOR =		0xff,	/* vendor specific reject */
};

/* default timeout values */

#define FC_DEF_E_D_TOV	2000UL
#define FC_DEF_R_A_TOV	10000UL

#endif /* _FC_FS_H_ */

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2025-11-08 08:03:22
..	dir	-	root/root	0755	2025-11-08 08:03:22
fc_els.h	text/x-c	38.67 KB	root/root	0644	2025-10-22 08:14:35
fc_fs.h	text/x-c	12.08 KB	root/root	0644	2025-10-22 08:14:35
fc_gs.h	text/x-c	2.83 KB	root/root	0644	2025-10-22 08:14:35
fc_ns.h	text/x-c	4.86 KB	root/root	0644	2025-10-22 08:14:35

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