include/scsi/fc_encode.h - maze/linux - Git at Google

 /*
  * 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>

 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_fid fid;
 		struct fc_ns_rsnn snn;
 	} payload;
 };

 /**
  * 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);
 	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);
 }

 /**
  * 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, fc_host_port_id(lport->host));
 }

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

 /**
  * fc_ct_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_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;

 	switch (op) {
 	case FC_NS_GPN_FT:
 		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_gid_ft));
 		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));
 		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));
 		hton24(ct->payload.rft.fid.fp_fid,
 		       fc_host_port_id(lport->host));
 		ct->payload.rft.fts = lport->fcts;
 		break;

 	case FC_NS_RNN_ID:
 		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rn_id));
 		hton24(ct->payload.rn.fr_fid.fp_fid,
 		       fc_host_port_id(lport->host));
 		ct->payload.rft.fts = lport->fcts;
 		put_unaligned_be64(lport->wwnn, &ct->payload.rn.fr_wwn);
 		break;

 	case FC_NS_RSNN_NN:
 		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rsnn));
 		put_unaligned_be64(lport->wwnn, &ct->payload.snn.fr_wwn);
 		strncpy(ct->payload.snn.fr_name,
 			fc_host_symbolic_name(lport->host), 255);
 		ct->payload.snn.fr_name_len =
 			strnlen(ct->payload.snn.fr_name, 255);
 		break;

 	default:
 		return -EINVAL;
 	}
 	*r_ctl = FC_RCTL_DD_UNSOL_CTL;
 	*fh_type = FC_TYPE_CT;
 	return 0;
 }

 /**
  * 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, fc_host_port_id(lport->host));
 	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, fc_host_port_id(lport->host));
 	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_ */
	/*
	* 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>

	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_fid fid;
	struct fc_ns_rsnn snn;
	} payload;
	};

	/**
	* 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);
	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);
	}

	/**
	* 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, fc_host_port_id(lport->host));
	}

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

	/**
	* fc_ct_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_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;

	switch (op) {
	case FC_NS_GPN_FT:
	ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_gid_ft));
	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));
	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));
	hton24(ct->payload.rft.fid.fp_fid,
	fc_host_port_id(lport->host));
	ct->payload.rft.fts = lport->fcts;
	break;

	case FC_NS_RNN_ID:
	ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rn_id));
	hton24(ct->payload.rn.fr_fid.fp_fid,
	fc_host_port_id(lport->host));
	ct->payload.rft.fts = lport->fcts;
	put_unaligned_be64(lport->wwnn, &ct->payload.rn.fr_wwn);
	break;

	case FC_NS_RSNN_NN:
	ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rsnn));
	put_unaligned_be64(lport->wwnn, &ct->payload.snn.fr_wwn);
	strncpy(ct->payload.snn.fr_name,
	fc_host_symbolic_name(lport->host), 255);
	ct->payload.snn.fr_name_len =
	strnlen(ct->payload.snn.fr_name, 255);
	break;

	default:
	return -EINVAL;
	}
	*r_ctl = FC_RCTL_DD_UNSOL_CTL;
	*fh_type = FC_TYPE_CT;
	return 0;
	}

	/**
	* 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, fc_host_port_id(lport->host));
	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, fc_host_port_id(lport->host));
	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_ */