path: root/drivers/scsi/bfa/include/protocol/fc.h

/*
 * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
 * All rights reserved
 * www.brocade.com
 *
 * Linux driver for Brocade Fibre Channel Host Bus Adapter.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License (GPL) Version 2 as
 * published by the Free Software Foundation
 *
 * This program is distributed in the hope that 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.
 */

#ifndef __FC_H__
#define __FC_H__

#include <protocol/types.h>

#pragma pack(1)

/*
 * Fibre Channel Header Structure (FCHS) definition
 */
struct fchs_s {
#ifdef __BIGENDIAN
	u32        routing:4;	/* routing bits */
	u32        cat_info:4;	/* category info */
#else
	u32        cat_info:4;	/* category info */
	u32        routing:4;	/* routing bits */
#endif
	u32        d_id:24;	/* destination identifier */

	u32        cs_ctl:8;	/* class specific control */
	u32        s_id:24;	/* source identifier */

	u32        type:8;		/* data structure type */
	u32        f_ctl:24;	/* initial frame control */

	u8         seq_id;		/* sequence identifier */
	u8         df_ctl;		/* data field control */
	u16        seq_cnt;	/* sequence count */

	u16        ox_id;		/* originator exchange ID */
	u16        rx_id;		/* responder exchange ID */

	u32        ro;		/* relative offset */
};
/*
 * Fibre Channel BB_E Header Structure
 */
struct fcbbehs_s {
	u16	ver_rsvd;
	u32	rsvd[2];
	u32	rsvd__sof;
};

#define FC_SEQ_ID_MAX		256

/*
 * routing bit definitions
 */
enum {
	FC_RTG_FC4_DEV_DATA	= 0x0,	/* FC-4 Device Data */
	FC_RTG_EXT_LINK		= 0x2,	/* Extended Link Data */
	FC_RTG_FC4_LINK_DATA	= 0x3,	/* FC-4 Link Data */
	FC_RTG_VIDEO_DATA	= 0x4,	/* Video Data */
	FC_RTG_EXT_HDR		= 0x5,	/* VFT, IFR or Encapsuled */
	FC_RTG_BASIC_LINK	= 0x8,	/* Basic Link data */
	FC_RTG_LINK_CTRL	= 0xC,	/* Link Control */
};

/*
 * information category for extended link data and FC-4 Link Data
 */
enum {
	FC_CAT_LD_REQUEST	= 0x2,	/* Request */
	FC_CAT_LD_REPLY		= 0x3,	/* Reply */
	FC_CAT_LD_DIAG		= 0xF,	/* for DIAG use only */
};

/*
 * information category for extended headers (VFT, IFR or encapsulation)
 */
enum {
	FC_CAT_VFT_HDR = 0x0,	/* Virtual fabric tagging header */
	FC_CAT_IFR_HDR = 0x1,	/* Inter-Fabric routing header */
	FC_CAT_ENC_HDR = 0x2,	/* Encapsulation header */
};

/*
 * information category for FC-4 device data
 */
enum {
	FC_CAT_UNCATEG_INFO	= 0x0,	/* Uncategorized information */
	FC_CAT_SOLICIT_DATA	= 0x1,	/* Solicited Data */
	FC_CAT_UNSOLICIT_CTRL	= 0x2,	/* Unsolicited Control */
	FC_CAT_SOLICIT_CTRL	= 0x3,	/* Solicited Control */
	FC_CAT_UNSOLICIT_DATA	= 0x4,	/* Unsolicited Data */
	FC_CAT_DATA_DESC	= 0x5,	/* Data Descriptor */
	FC_CAT_UNSOLICIT_CMD	= 0x6,	/* Unsolicited Command */
	FC_CAT_CMD_STATUS	= 0x7,	/* Command Status */
};

/*
 * information category for Link Control
 */
enum {
	FC_CAT_ACK_1		= 0x00,
	FC_CAT_ACK_0_N		= 0x01,
	FC_CAT_P_RJT		= 0x02,
	FC_CAT_F_RJT		= 0x03,
	FC_CAT_P_BSY		= 0x04,
	FC_CAT_F_BSY_DATA	= 0x05,
	FC_CAT_F_BSY_LINK_CTL	= 0x06,
	FC_CAT_F_LCR		= 0x07,
	FC_CAT_NTY		= 0x08,
	FC_CAT_END		= 0x09,
};

/*
 * Type Field Definitions. FC-PH Section 18.5 pg. 165
 */
enum {
	FC_TYPE_BLS		= 0x0,	/* Basic Link Service */
	FC_TYPE_ELS		= 0x1,	/* Extended Link Service */
	FC_TYPE_IP		= 0x5,	/* IP */
	FC_TYPE_FCP		= 0x8,	/* SCSI-FCP */
	FC_TYPE_GPP		= 0x9,	/* SCSI_GPP */
	FC_TYPE_SERVICES	= 0x20,	/* Fibre Channel Services */
	FC_TYPE_FC_FSS		= 0x22,	/* Fabric Switch Services */
	FC_TYPE_FC_AL		= 0x23,	/* FC-AL */
	FC_TYPE_FC_SNMP		= 0x24,	/* FC-SNMP */
	FC_TYPE_MAX		= 256,	/* 256 FC-4 types */
};

struct fc_fc4types_s{
	u8         bits[FC_TYPE_MAX / 8];
};

/*
 * Frame Control Definitions. FC-PH Table-45. pg. 168
 */
enum {
	FCTL_EC_ORIG = 0x000000,	/* exchange originator */
	FCTL_EC_RESP = 0x800000,	/* exchange responder */
	FCTL_SEQ_INI = 0x000000,	/* sequence initiator */
	FCTL_SEQ_REC = 0x400000,	/* sequence recipient */