/*
* 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>
/*
* 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;
} 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)
{
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;
size_t len;
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, 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));
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));
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);
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);
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_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_ */