/*
   * Copyright(c) 2008 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_ENCODE_H_
  #define _FC_ENCODE_H_
  #include <asm/unaligned.h>

  #include <linux/utsname.h>

  /*
   * F_CTL values for simple requests and responses.
   */
  #define FC_FCTL_REQ	(FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT)
  #define FC_FCTL_RESP	(FC_FC_EX_CTX | FC_FC_LAST_SEQ | \
  			FC_FC_END_SEQ | FC_FC_SEQ_INIT)

  struct fc_ns_rft {
  	struct fc_ns_fid fid;	/* port ID object */
  	struct fc_ns_fts fts;	/* FC4-types object */
  };
  
  struct fc_ct_req {
  	struct fc_ct_hdr hdr;
  	union {
  		struct fc_ns_gid_ft gid;
  		struct fc_ns_rn_id  rn;
  		struct fc_ns_rft rft;

  		struct fc_ns_rff_id rff;

  		struct fc_ns_fid fid;

  		struct fc_ns_rsnn snn;

  		struct fc_ns_rspn spn;

  		struct fc_fdmi_rhba rhba;
  		struct fc_fdmi_rpa  rpa;
  		struct fc_fdmi_dprt dprt;
  		struct fc_fdmi_dhba dhba;

  	} payload;
  };

  static inline void __fc_fill_fc_hdr(struct fc_frame_header *fh,
  				    enum fc_rctl r_ctl,
  				    u32 did, u32 sid, enum fc_fh_type type,
  				    u32 f_ctl, u32 parm_offset)

  {

  	WARN_ON(r_ctl == 0);
  	fh->fh_r_ctl = r_ctl;
  	hton24(fh->fh_d_id, did);
  	hton24(fh->fh_s_id, sid);
  	fh->fh_type = type;
  	hton24(fh->fh_f_ctl, f_ctl);
  	fh->fh_cs_ctl = 0;
  	fh->fh_df_ctl = 0;
  	fh->fh_parm_offset = htonl(parm_offset);
  }
  
  /**

   * fill FC header fields in specified fc_frame
   */
  static inline void fc_fill_fc_hdr(struct fc_frame *fp, enum fc_rctl r_ctl,
  				  u32 did, u32 sid, enum fc_fh_type type,
  				  u32 f_ctl, u32 parm_offset)
  {
  	struct fc_frame_header *fh;
  
  	fh = fc_frame_header_get(fp);
  	__fc_fill_fc_hdr(fh, r_ctl, did, sid, type, f_ctl, parm_offset);
  }
  
  /**

   * fc_adisc_fill() - Fill in adisc request frame
   * @lport: local port.
   * @fp: fc frame where payload will be placed.
   */
  static inline void fc_adisc_fill(struct fc_lport *lport, struct fc_frame *fp)
  {
  	struct fc_els_adisc *adisc;
  
  	adisc = fc_frame_payload_get(fp, sizeof(*adisc));
  	memset(adisc, 0, sizeof(*adisc));
  	adisc->adisc_cmd = ELS_ADISC;
  	put_unaligned_be64(lport->wwpn, &adisc->adisc_wwpn);
  	put_unaligned_be64(lport->wwnn, &adisc->adisc_wwnn);

  	hton24(adisc->adisc_port_id, lport->port_id);

  }
  
  /**

   * fc_ct_hdr_fill- fills ct header and reset ct payload
   * returns pointer to ct request.
   */
  static inline struct fc_ct_req *fc_ct_hdr_fill(const struct fc_frame *fp,

  					       unsigned int op, size_t req_size,
  					       enum fc_ct_fs_type fs_type,
  					       u8 subtype)

  {
  	struct fc_ct_req *ct;
  	size_t ct_plen;
  
  	ct_plen  = sizeof(struct fc_ct_hdr) + req_size;
  	ct = fc_frame_payload_get(fp, ct_plen);
  	memset(ct, 0, ct_plen);
  	ct->hdr.ct_rev = FC_CT_REV;

  	ct->hdr.ct_fs_type = fs_type;
  	ct->hdr.ct_fs_subtype = subtype;

  	ct->hdr.ct_cmd = htons((u16) op);
  	return ct;
  }
  
  /**

   * fc_ct_ns_fill() - Fill in a name service request frame

   * @lport: local port.
   * @fc_id: FC_ID of non-destination rport for GPN_ID and similar inquiries.
   * @fp: frame to contain payload.
   * @op: CT opcode.
   * @r_ctl: pointer to FC header R_CTL.
   * @fh_type: pointer to FC-4 type.

   */

  static inline int fc_ct_ns_fill(struct fc_lport *lport,

  		      u32 fc_id, struct fc_frame *fp,

  		      unsigned int op, enum fc_rctl *r_ctl,

  		      enum fc_fh_type *fh_type)
  {
  	struct fc_ct_req *ct;

  	size_t len;

  
  	switch (op) {
  	case FC_NS_GPN_FT:

  		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_gid_ft),
  				    FC_FST_DIR, FC_NS_SUBTYPE);

  		ct->payload.gid.fn_fc4_type = FC_TYPE_FCP;
  		break;

  	case FC_NS_GPN_ID:

  		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_fid),
  				    FC_FST_DIR, FC_NS_SUBTYPE);
  		ct->payload.gid.fn_fc4_type = FC_TYPE_FCP;

  		hton24(ct->payload.fid.fp_fid, fc_id);
  		break;

  	case FC_NS_RFT_ID:

  		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rft),
  				    FC_FST_DIR, FC_NS_SUBTYPE);

  		hton24(ct->payload.rft.fid.fp_fid, lport->port_id);

  		ct->payload.rft.fts = lport->fcts;
  		break;

  	case FC_NS_RFF_ID:

  		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rff_id),
  				    FC_FST_DIR, FC_NS_SUBTYPE);

  		hton24(ct->payload.rff.fr_fid.fp_fid, lport->port_id);

  		ct->payload.rff.fr_type = FC_TYPE_FCP;
  		if (lport->service_params & FCP_SPPF_INIT_FCN)
  			ct->payload.rff.fr_feat = FCP_FEAT_INIT;
  		if (lport->service_params & FCP_SPPF_TARG_FCN)
  			ct->payload.rff.fr_feat |= FCP_FEAT_TARG;
  		break;

  	case FC_NS_RNN_ID:

  		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rn_id),
  				    FC_FST_DIR, FC_NS_SUBTYPE);

  		hton24(ct->payload.rn.fr_fid.fp_fid, lport->port_id);

  		put_unaligned_be64(lport->wwnn, &ct->payload.rn.fr_wwn);

  		break;

  	case FC_NS_RSPN_ID:

  		len = strnlen(fc_host_symbolic_name(lport->host), 255);

  		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rspn) + len,
  				    FC_FST_DIR, FC_NS_SUBTYPE);

  		hton24(ct->payload.spn.fr_fid.fp_fid, lport->port_id);

  		strncpy(ct->payload.spn.fr_name,

  			fc_host_symbolic_name(lport->host), len);
  		ct->payload.spn.fr_name_len = len;

  		break;

  	case FC_NS_RSNN_NN:

  		len = strnlen(fc_host_symbolic_name(lport->host), 255);

  		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rsnn) + len,
  				    FC_FST_DIR, FC_NS_SUBTYPE);

  		put_unaligned_be64(lport->wwnn, &ct->payload.snn.fr_wwn);
  		strncpy(ct->payload.snn.fr_name,

  			fc_host_symbolic_name(lport->host), len);
  		ct->payload.snn.fr_name_len = len;

  		break;

  	default:

  		return -EINVAL;
  	}
  	*r_ctl = FC_RCTL_DD_UNSOL_CTL;

  	*fh_type = FC_TYPE_CT;
  	return 0;
  }
  
  /**

   * fc_ct_ms_fill() - Fill in a mgmt service request frame
   * @lport: local port.
   * @fc_id: FC_ID of non-destination rport for GPN_ID and similar inquiries.
   * @fp: frame to contain payload.
   * @op: CT opcode.
   * @r_ctl: pointer to FC header R_CTL.
   * @fh_type: pointer to FC-4 type.
   */
  static inline int fc_ct_ms_fill(struct fc_lport *lport,
  		      u32 fc_id, struct fc_frame *fp,
  		      unsigned int op, enum fc_rctl *r_ctl,
  		      enum fc_fh_type *fh_type)
  {
  	struct fc_ct_req *ct;
  	size_t len;
  	struct fc_fdmi_attr_entry *entry;
  	struct fs_fdmi_attrs *hba_attrs;
  	int numattrs = 0;
  
  	switch (op) {
  	case FC_FDMI_RHBA:
  		numattrs = 10;
  		len = sizeof(struct fc_fdmi_rhba);
  		len -= sizeof(struct fc_fdmi_attr_entry);
  		len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN);
  		len += FC_FDMI_HBA_ATTR_NODENAME_LEN;
  		len += FC_FDMI_HBA_ATTR_MANUFACTURER_LEN;
  		len += FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN;
  		len += FC_FDMI_HBA_ATTR_MODEL_LEN;
  		len += FC_FDMI_HBA_ATTR_MODELDESCR_LEN;
  		len += FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN;
  		len += FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN;
  		len += FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN;
  		len += FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN;
  		len += FC_FDMI_HBA_ATTR_OSNAMEVERSION_LEN;
  		ct = fc_ct_hdr_fill(fp, op, len, FC_FST_MGMT,
  				    FC_FDMI_SUBTYPE);
  
  		/* HBA Identifier */
  		put_unaligned_be64(lport->wwpn, &ct->payload.rhba.hbaid.id);
  		/* Number of Ports - always 1 */
  		put_unaligned_be32(1, &ct->payload.rhba.port.numport);
  		/* Port Name */
  		put_unaligned_be64(lport->wwpn,
  				   &ct->payload.rhba.port.port[0].portname);
  
  		/* HBA Attributes */
  		put_unaligned_be32(numattrs,
  				   &ct->payload.rhba.hba_attrs.numattrs);
  		hba_attrs = &ct->payload.rhba.hba_attrs;
  		entry = (struct fc_fdmi_attr_entry *)hba_attrs->attr;
  		/* NodeName*/
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_HBA_ATTR_NODENAME_LEN;
  		put_unaligned_be16(FC_FDMI_HBA_ATTR_NODENAME,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		put_unaligned_be64(lport->wwnn,
  				   (__be64 *)&entry->value[0]);
  
  		/* Manufacturer */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_HBA_ATTR_NODENAME_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_HBA_ATTR_MANUFACTURER_LEN;
  		put_unaligned_be16(FC_FDMI_HBA_ATTR_MANUFACTURER,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		strncpy((char *)&entry->value,
  			fc_host_manufacturer(lport->host),
  			FC_FDMI_HBA_ATTR_MANUFACTURER_LEN);
  
  		/* SerialNumber */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_HBA_ATTR_MANUFACTURER_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN;
  		put_unaligned_be16(FC_FDMI_HBA_ATTR_SERIALNUMBER,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		strncpy((char *)&entry->value,
  			fc_host_serial_number(lport->host),
  			FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN);
  
  		/* Model */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_HBA_ATTR_MODEL_LEN;
  		put_unaligned_be16(FC_FDMI_HBA_ATTR_MODEL,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		strncpy((char *)&entry->value,
  			fc_host_model(lport->host),
  			FC_FDMI_HBA_ATTR_MODEL_LEN);
  
  		/* Model Description */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_HBA_ATTR_MODEL_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_HBA_ATTR_MODELDESCR_LEN;
  		put_unaligned_be16(FC_FDMI_HBA_ATTR_MODELDESCRIPTION,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		strncpy((char *)&entry->value,
  			fc_host_model_description(lport->host),
  			FC_FDMI_HBA_ATTR_MODELDESCR_LEN);
  
  		/* Hardware Version */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_HBA_ATTR_MODELDESCR_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN;
  		put_unaligned_be16(FC_FDMI_HBA_ATTR_HARDWAREVERSION,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		strncpy((char *)&entry->value,
  			fc_host_hardware_version(lport->host),
  			FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN);
  
  		/* Driver Version */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN;
  		put_unaligned_be16(FC_FDMI_HBA_ATTR_DRIVERVERSION,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		strncpy((char *)&entry->value,
  			fc_host_driver_version(lport->host),
  			FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN);
  
  		/* OptionROM Version */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN;
  		put_unaligned_be16(FC_FDMI_HBA_ATTR_OPTIONROMVERSION,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		strncpy((char *)&entry->value,
  			fc_host_optionrom_version(lport->host),
  			FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN);
  
  		/* Firmware Version */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN;
  		put_unaligned_be16(FC_FDMI_HBA_ATTR_FIRMWAREVERSION,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		strncpy((char *)&entry->value,
  			fc_host_firmware_version(lport->host),
  			FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN);
  
  		/* OS Name and Version */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_HBA_ATTR_OSNAMEVERSION_LEN;
  		put_unaligned_be16(FC_FDMI_HBA_ATTR_OSNAMEVERSION,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		snprintf((char *)&entry->value,
  			FC_FDMI_HBA_ATTR_OSNAMEVERSION_LEN,
  			"%s v%s",
  			init_utsname()->sysname,
  			init_utsname()->release);
  		break;
  	case FC_FDMI_RPA:
  		numattrs = 6;
  		len = sizeof(struct fc_fdmi_rpa);
  		len -= sizeof(struct fc_fdmi_attr_entry);
  		len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN);
  		len += FC_FDMI_PORT_ATTR_FC4TYPES_LEN;
  		len += FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN;
  		len += FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN;
  		len += FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN;
  		len += FC_FDMI_PORT_ATTR_OSDEVICENAME_LEN;
  		len += FC_FDMI_PORT_ATTR_HOSTNAME_LEN;
  		ct = fc_ct_hdr_fill(fp, op, len, FC_FST_MGMT,
  				    FC_FDMI_SUBTYPE);
  
  		/* Port Name */
  		put_unaligned_be64(lport->wwpn,
  				   &ct->payload.rpa.port.portname);
  
  		/* Port Attributes */
  		put_unaligned_be32(numattrs,
  				   &ct->payload.rpa.hba_attrs.numattrs);
  
  		hba_attrs = &ct->payload.rpa.hba_attrs;
  		entry = (struct fc_fdmi_attr_entry *)hba_attrs->attr;
  
  		/* FC4 types */
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_PORT_ATTR_FC4TYPES_LEN;
  		put_unaligned_be16(FC_FDMI_PORT_ATTR_FC4TYPES,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		memcpy(&entry->value, fc_host_supported_fc4s(lport->host),
  		       FC_FDMI_PORT_ATTR_FC4TYPES_LEN);
  
  		/* Supported Speed */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_PORT_ATTR_FC4TYPES_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN;
  		put_unaligned_be16(FC_FDMI_PORT_ATTR_SUPPORTEDSPEED,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  
  		put_unaligned_be32(fc_host_supported_speeds(lport->host),
  				   &entry->value);
  
  		/* Current Port Speed */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN;
  		put_unaligned_be16(FC_FDMI_PORT_ATTR_CURRENTPORTSPEED,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		put_unaligned_be32(lport->link_speed,
  				   &entry->value);
  
  		/* Max Frame Size */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN;
  		put_unaligned_be16(FC_FDMI_PORT_ATTR_MAXFRAMESIZE,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		put_unaligned_be32(fc_host_maxframe_size(lport->host),
  				   &entry->value);
  
  		/* OS Device Name */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_PORT_ATTR_OSDEVICENAME_LEN;
  		put_unaligned_be16(FC_FDMI_PORT_ATTR_OSDEVICENAME,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		/* Use the sysfs device name */
  		strncpy((char *)&entry->value,
  			dev_name(&lport->host->shost_gendev),
  			strnlen(dev_name(&lport->host->shost_gendev),
  				FC_FDMI_PORT_ATTR_HOSTNAME_LEN));
  
  		/* Host Name */
  		entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
  					FC_FDMI_PORT_ATTR_OSDEVICENAME_LEN);
  		len = FC_FDMI_ATTR_ENTRY_HEADER_LEN;
  		len += FC_FDMI_PORT_ATTR_HOSTNAME_LEN;
  		put_unaligned_be16(FC_FDMI_PORT_ATTR_HOSTNAME,
  				   &entry->type);
  		put_unaligned_be16(len, &entry->len);
  		if (strlen(fc_host_system_hostname(lport->host)))
  			strncpy((char *)&entry->value,
  				fc_host_system_hostname(lport->host),
  				strnlen(fc_host_system_hostname(lport->host),
  					FC_FDMI_PORT_ATTR_HOSTNAME_LEN));
  		else
  			strncpy((char *)&entry->value,
  				init_utsname()->nodename,
  				FC_FDMI_PORT_ATTR_HOSTNAME_LEN);
  		break;
  	case FC_FDMI_DPRT:
  		len = sizeof(struct fc_fdmi_dprt);
  		ct = fc_ct_hdr_fill(fp, op, len, FC_FST_MGMT,
  				    FC_FDMI_SUBTYPE);
  		/* Port Name */
  		put_unaligned_be64(lport->wwpn,
  				   &ct->payload.dprt.port.portname);
  		break;
  	case FC_FDMI_DHBA:
  		len = sizeof(struct fc_fdmi_dhba);
  		ct = fc_ct_hdr_fill(fp, op, len, FC_FST_MGMT,
  				    FC_FDMI_SUBTYPE);
  		/* HBA Identifier */
  		put_unaligned_be64(lport->wwpn, &ct->payload.dhba.hbaid.id);
  		break;
  	default:
  		return -EINVAL;
  	}
  	*r_ctl = FC_RCTL_DD_UNSOL_CTL;
  	*fh_type = FC_TYPE_CT;
  	return 0;
  }
  
  /**

   * fc_ct_fill() - Fill in a common transport service request frame
   * @lport: local port.
   * @fc_id: FC_ID of non-destination rport for GPN_ID and similar inquiries.
   * @fp: frame to contain payload.
   * @op: CT opcode.
   * @r_ctl: pointer to FC header R_CTL.
   * @fh_type: pointer to FC-4 type.
   */
  static inline int fc_ct_fill(struct fc_lport *lport,
  		      u32 fc_id, struct fc_frame *fp,
  		      unsigned int op, enum fc_rctl *r_ctl,
  		      enum fc_fh_type *fh_type, u32 *did)
  {
  	int rc = -EINVAL;
  
  	switch (fc_id) {

  	case FC_FID_MGMT_SERV:
  		rc = fc_ct_ms_fill(lport, fc_id, fp, op, r_ctl, fh_type);
  		*did = FC_FID_MGMT_SERV;
  		break;

  	case FC_FID_DIR_SERV:
  	default:
  		rc = fc_ct_ns_fill(lport, fc_id, fp, op, r_ctl, fh_type);
  		*did = FC_FID_DIR_SERV;
  		break;
  	}
  
  	return rc;
  }
  /**

   * fc_plogi_fill - Fill in plogi request frame
   */
  static inline void fc_plogi_fill(struct fc_lport *lport, struct fc_frame *fp,
  				 unsigned int op)
  {
  	struct fc_els_flogi *plogi;
  	struct fc_els_csp *csp;
  	struct fc_els_cssp *cp;
  
  	plogi = fc_frame_payload_get(fp, sizeof(*plogi));
  	memset(plogi, 0, sizeof(*plogi));
  	plogi->fl_cmd = (u8) op;
  	put_unaligned_be64(lport->wwpn, &plogi->fl_wwpn);
  	put_unaligned_be64(lport->wwnn, &plogi->fl_wwnn);
  
  	csp = &plogi->fl_csp;
  	csp->sp_hi_ver = 0x20;
  	csp->sp_lo_ver = 0x20;
  	csp->sp_bb_cred = htons(10);	/* this gets set by gateway */
  	csp->sp_bb_data = htons((u16) lport->mfs);
  	cp = &plogi->fl_cssp[3 - 1];	/* class 3 parameters */
  	cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
  	csp->sp_features = htons(FC_SP_FT_CIRO);
  	csp->sp_tot_seq = htons(255);	/* seq. we accept */
  	csp->sp_rel_off = htons(0x1f);
  	csp->sp_e_d_tov = htonl(lport->e_d_tov);
  
  	cp->cp_rdfs = htons((u16) lport->mfs);
  	cp->cp_con_seq = htons(255);
  	cp->cp_open_seq = 1;
  }
  
  /**
   * fc_flogi_fill - Fill in a flogi request frame.
   */
  static inline void fc_flogi_fill(struct fc_lport *lport, struct fc_frame *fp)
  {
  	struct fc_els_csp *sp;
  	struct fc_els_cssp *cp;
  	struct fc_els_flogi *flogi;
  
  	flogi = fc_frame_payload_get(fp, sizeof(*flogi));
  	memset(flogi, 0, sizeof(*flogi));
  	flogi->fl_cmd = (u8) ELS_FLOGI;
  	put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
  	put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
  	sp = &flogi->fl_csp;
  	sp->sp_hi_ver = 0x20;
  	sp->sp_lo_ver = 0x20;
  	sp->sp_bb_cred = htons(10);	/* this gets set by gateway */
  	sp->sp_bb_data = htons((u16) lport->mfs);
  	cp = &flogi->fl_cssp[3 - 1];	/* class 3 parameters */
  	cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);

  	if (lport->does_npiv)
  		sp->sp_features = htons(FC_SP_FT_NPIV);
  }
  
  /**
   * fc_fdisc_fill - Fill in a fdisc request frame.
   */
  static inline void fc_fdisc_fill(struct fc_lport *lport, struct fc_frame *fp)
  {
  	struct fc_els_csp *sp;
  	struct fc_els_cssp *cp;
  	struct fc_els_flogi *fdisc;
  
  	fdisc = fc_frame_payload_get(fp, sizeof(*fdisc));
  	memset(fdisc, 0, sizeof(*fdisc));
  	fdisc->fl_cmd = (u8) ELS_FDISC;
  	put_unaligned_be64(lport->wwpn, &fdisc->fl_wwpn);
  	put_unaligned_be64(lport->wwnn, &fdisc->fl_wwnn);
  	sp = &fdisc->fl_csp;
  	sp->sp_hi_ver = 0x20;
  	sp->sp_lo_ver = 0x20;
  	sp->sp_bb_cred = htons(10);	/* this gets set by gateway */
  	sp->sp_bb_data = htons((u16) lport->mfs);
  	cp = &fdisc->fl_cssp[3 - 1];	/* class 3 parameters */
  	cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);

  }
  
  /**
   * fc_logo_fill - Fill in a logo request frame.
   */
  static inline void fc_logo_fill(struct fc_lport *lport, struct fc_frame *fp)
  {
  	struct fc_els_logo *logo;
  
  	logo = fc_frame_payload_get(fp, sizeof(*logo));
  	memset(logo, 0, sizeof(*logo));
  	logo->fl_cmd = ELS_LOGO;

  	hton24(logo->fl_n_port_id, lport->port_id);

  	logo->fl_n_port_wwn = htonll(lport->wwpn);
  }
  
  /**
   * fc_rtv_fill - Fill in RTV (read timeout value) request frame.
   */
  static inline void fc_rtv_fill(struct fc_lport *lport, struct fc_frame *fp)
  {
  	struct fc_els_rtv *rtv;
  
  	rtv = fc_frame_payload_get(fp, sizeof(*rtv));
  	memset(rtv, 0, sizeof(*rtv));
  	rtv->rtv_cmd = ELS_RTV;
  }
  
  /**
   * fc_rec_fill - Fill in rec request frame
   */
  static inline void fc_rec_fill(struct fc_lport *lport, struct fc_frame *fp)
  {
  	struct fc_els_rec *rec;
  	struct fc_exch *ep = fc_seq_exch(fr_seq(fp));
  
  	rec = fc_frame_payload_get(fp, sizeof(*rec));
  	memset(rec, 0, sizeof(*rec));
  	rec->rec_cmd = ELS_REC;

  	hton24(rec->rec_s_id, lport->port_id);

  	rec->rec_ox_id = htons(ep->oxid);
  	rec->rec_rx_id = htons(ep->rxid);
  }
  
  /**
   * fc_prli_fill - Fill in prli request frame
   */
  static inline void fc_prli_fill(struct fc_lport *lport, struct fc_frame *fp)
  {
  	struct {
  		struct fc_els_prli prli;
  		struct fc_els_spp spp;
  	} *pp;
  
  	pp = fc_frame_payload_get(fp, sizeof(*pp));
  	memset(pp, 0, sizeof(*pp));
  	pp->prli.prli_cmd = ELS_PRLI;
  	pp->prli.prli_spp_len = sizeof(struct fc_els_spp);
  	pp->prli.prli_len = htons(sizeof(*pp));
  	pp->spp.spp_type = FC_TYPE_FCP;
  	pp->spp.spp_flags = FC_SPP_EST_IMG_PAIR;
  	pp->spp.spp_params = htonl(lport->service_params);
  }
  
  /**
   * fc_scr_fill - Fill in a scr request frame.
   */
  static inline void fc_scr_fill(struct fc_lport *lport, struct fc_frame *fp)
  {
  	struct fc_els_scr *scr;
  
  	scr = fc_frame_payload_get(fp, sizeof(*scr));
  	memset(scr, 0, sizeof(*scr));
  	scr->scr_cmd = ELS_SCR;
  	scr->scr_reg_func = ELS_SCRF_FULL;
  }
  
  /**
   * fc_els_fill - Fill in an ELS  request frame
   */

  static inline int fc_els_fill(struct fc_lport *lport,

  		       u32 did,

  		       struct fc_frame *fp, unsigned int op,

  		       enum fc_rctl *r_ctl, enum fc_fh_type *fh_type)

  {
  	switch (op) {

  	case ELS_ADISC:
  		fc_adisc_fill(lport, fp);
  		break;

  	case ELS_PLOGI:
  		fc_plogi_fill(lport, fp, ELS_PLOGI);

  		break;
  
  	case ELS_FLOGI:
  		fc_flogi_fill(lport, fp);

  		break;

  	case ELS_FDISC:
  		fc_fdisc_fill(lport, fp);
  		break;

  	case ELS_LOGO:
  		fc_logo_fill(lport, fp);

  		break;
  
  	case ELS_RTV:
  		fc_rtv_fill(lport, fp);

  		break;
  
  	case ELS_REC:
  		fc_rec_fill(lport, fp);

  		break;
  
  	case ELS_PRLI:
  		fc_prli_fill(lport, fp);

  		break;
  
  	case ELS_SCR:
  		fc_scr_fill(lport, fp);

  		break;
  
  	default:

  		return -EINVAL;
  	}
  
  	*r_ctl = FC_RCTL_ELS_REQ;
  	*fh_type = FC_TYPE_ELS;
  	return 0;
  }
  #endif /* _FC_ENCODE_H_ */