310 строки
7.7 KiB
C
310 строки
7.7 KiB
C
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/*
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* Copyright(c) 2008 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Maintained at www.Open-FCoE.org
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*/
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#ifndef _FC_ENCODE_H_
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#define _FC_ENCODE_H_
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#include <asm/unaligned.h>
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struct fc_ns_rft {
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struct fc_ns_fid fid; /* port ID object */
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struct fc_ns_fts fts; /* FC4-types object */
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};
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struct fc_ct_req {
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struct fc_ct_hdr hdr;
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union {
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struct fc_ns_gid_ft gid;
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struct fc_ns_rn_id rn;
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struct fc_ns_rft rft;
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} payload;
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};
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/**
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* fill FC header fields in specified fc_frame
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*/
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static inline void fc_fill_fc_hdr(struct fc_frame *fp, enum fc_rctl r_ctl,
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u32 did, u32 sid, enum fc_fh_type type,
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u32 f_ctl, u32 parm_offset)
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{
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struct fc_frame_header *fh;
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fh = fc_frame_header_get(fp);
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WARN_ON(r_ctl == 0);
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fh->fh_r_ctl = r_ctl;
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hton24(fh->fh_d_id, did);
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hton24(fh->fh_s_id, sid);
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fh->fh_type = type;
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hton24(fh->fh_f_ctl, f_ctl);
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fh->fh_cs_ctl = 0;
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fh->fh_df_ctl = 0;
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fh->fh_parm_offset = htonl(parm_offset);
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}
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/**
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* fc_ct_hdr_fill- fills ct header and reset ct payload
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* returns pointer to ct request.
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*/
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static inline struct fc_ct_req *fc_ct_hdr_fill(const struct fc_frame *fp,
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unsigned int op, size_t req_size)
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{
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struct fc_ct_req *ct;
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size_t ct_plen;
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ct_plen = sizeof(struct fc_ct_hdr) + req_size;
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ct = fc_frame_payload_get(fp, ct_plen);
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memset(ct, 0, ct_plen);
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ct->hdr.ct_rev = FC_CT_REV;
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ct->hdr.ct_fs_type = FC_FST_DIR;
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ct->hdr.ct_fs_subtype = FC_NS_SUBTYPE;
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ct->hdr.ct_cmd = htons((u16) op);
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return ct;
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}
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/**
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* fc_ct_fill - Fill in a name service request frame
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*/
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static inline int fc_ct_fill(struct fc_lport *lport, struct fc_frame *fp,
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unsigned int op, enum fc_rctl *r_ctl, u32 *did,
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enum fc_fh_type *fh_type)
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{
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struct fc_ct_req *ct;
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switch (op) {
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case FC_NS_GPN_FT:
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ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_gid_ft));
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ct->payload.gid.fn_fc4_type = FC_TYPE_FCP;
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break;
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case FC_NS_RFT_ID:
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ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rft));
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hton24(ct->payload.rft.fid.fp_fid,
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fc_host_port_id(lport->host));
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ct->payload.rft.fts = lport->fcts;
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break;
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case FC_NS_RPN_ID:
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ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rn_id));
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hton24(ct->payload.rn.fr_fid.fp_fid,
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fc_host_port_id(lport->host));
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ct->payload.rft.fts = lport->fcts;
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put_unaligned_be64(lport->wwpn, &ct->payload.rn.fr_wwn);
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break;
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default:
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FC_DBG("Invalid op code %x \n", op);
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return -EINVAL;
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}
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*r_ctl = FC_RCTL_DD_UNSOL_CTL;
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*did = FC_FID_DIR_SERV;
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*fh_type = FC_TYPE_CT;
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return 0;
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}
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/**
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* fc_plogi_fill - Fill in plogi request frame
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*/
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static inline void fc_plogi_fill(struct fc_lport *lport, struct fc_frame *fp,
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unsigned int op)
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{
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struct fc_els_flogi *plogi;
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struct fc_els_csp *csp;
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struct fc_els_cssp *cp;
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plogi = fc_frame_payload_get(fp, sizeof(*plogi));
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memset(plogi, 0, sizeof(*plogi));
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plogi->fl_cmd = (u8) op;
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put_unaligned_be64(lport->wwpn, &plogi->fl_wwpn);
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put_unaligned_be64(lport->wwnn, &plogi->fl_wwnn);
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csp = &plogi->fl_csp;
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csp->sp_hi_ver = 0x20;
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csp->sp_lo_ver = 0x20;
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csp->sp_bb_cred = htons(10); /* this gets set by gateway */
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csp->sp_bb_data = htons((u16) lport->mfs);
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cp = &plogi->fl_cssp[3 - 1]; /* class 3 parameters */
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cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
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csp->sp_features = htons(FC_SP_FT_CIRO);
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csp->sp_tot_seq = htons(255); /* seq. we accept */
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csp->sp_rel_off = htons(0x1f);
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csp->sp_e_d_tov = htonl(lport->e_d_tov);
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cp->cp_rdfs = htons((u16) lport->mfs);
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cp->cp_con_seq = htons(255);
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cp->cp_open_seq = 1;
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}
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/**
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* fc_flogi_fill - Fill in a flogi request frame.
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*/
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static inline void fc_flogi_fill(struct fc_lport *lport, struct fc_frame *fp)
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{
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struct fc_els_csp *sp;
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struct fc_els_cssp *cp;
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struct fc_els_flogi *flogi;
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flogi = fc_frame_payload_get(fp, sizeof(*flogi));
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memset(flogi, 0, sizeof(*flogi));
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flogi->fl_cmd = (u8) ELS_FLOGI;
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put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
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put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
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sp = &flogi->fl_csp;
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sp->sp_hi_ver = 0x20;
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sp->sp_lo_ver = 0x20;
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sp->sp_bb_cred = htons(10); /* this gets set by gateway */
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sp->sp_bb_data = htons((u16) lport->mfs);
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cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
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cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
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}
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/**
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* fc_logo_fill - Fill in a logo request frame.
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*/
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static inline void fc_logo_fill(struct fc_lport *lport, struct fc_frame *fp)
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{
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struct fc_els_logo *logo;
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logo = fc_frame_payload_get(fp, sizeof(*logo));
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memset(logo, 0, sizeof(*logo));
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logo->fl_cmd = ELS_LOGO;
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hton24(logo->fl_n_port_id, fc_host_port_id(lport->host));
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logo->fl_n_port_wwn = htonll(lport->wwpn);
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}
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/**
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* fc_rtv_fill - Fill in RTV (read timeout value) request frame.
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*/
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static inline void fc_rtv_fill(struct fc_lport *lport, struct fc_frame *fp)
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{
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struct fc_els_rtv *rtv;
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rtv = fc_frame_payload_get(fp, sizeof(*rtv));
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memset(rtv, 0, sizeof(*rtv));
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rtv->rtv_cmd = ELS_RTV;
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}
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/**
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* fc_rec_fill - Fill in rec request frame
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*/
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static inline void fc_rec_fill(struct fc_lport *lport, struct fc_frame *fp)
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{
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struct fc_els_rec *rec;
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struct fc_exch *ep = fc_seq_exch(fr_seq(fp));
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rec = fc_frame_payload_get(fp, sizeof(*rec));
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memset(rec, 0, sizeof(*rec));
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rec->rec_cmd = ELS_REC;
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hton24(rec->rec_s_id, fc_host_port_id(lport->host));
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rec->rec_ox_id = htons(ep->oxid);
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rec->rec_rx_id = htons(ep->rxid);
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}
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/**
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* fc_prli_fill - Fill in prli request frame
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*/
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static inline void fc_prli_fill(struct fc_lport *lport, struct fc_frame *fp)
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{
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struct {
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struct fc_els_prli prli;
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struct fc_els_spp spp;
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} *pp;
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pp = fc_frame_payload_get(fp, sizeof(*pp));
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memset(pp, 0, sizeof(*pp));
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pp->prli.prli_cmd = ELS_PRLI;
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pp->prli.prli_spp_len = sizeof(struct fc_els_spp);
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pp->prli.prli_len = htons(sizeof(*pp));
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pp->spp.spp_type = FC_TYPE_FCP;
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pp->spp.spp_flags = FC_SPP_EST_IMG_PAIR;
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pp->spp.spp_params = htonl(lport->service_params);
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}
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/**
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* fc_scr_fill - Fill in a scr request frame.
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*/
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static inline void fc_scr_fill(struct fc_lport *lport, struct fc_frame *fp)
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{
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struct fc_els_scr *scr;
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scr = fc_frame_payload_get(fp, sizeof(*scr));
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memset(scr, 0, sizeof(*scr));
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scr->scr_cmd = ELS_SCR;
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scr->scr_reg_func = ELS_SCRF_FULL;
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}
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/**
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* fc_els_fill - Fill in an ELS request frame
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*/
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static inline int fc_els_fill(struct fc_lport *lport, struct fc_rport *rport,
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struct fc_frame *fp, unsigned int op,
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enum fc_rctl *r_ctl, u32 *did, enum fc_fh_type *fh_type)
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{
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switch (op) {
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case ELS_PLOGI:
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fc_plogi_fill(lport, fp, ELS_PLOGI);
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*did = rport->port_id;
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break;
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case ELS_FLOGI:
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fc_flogi_fill(lport, fp);
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*did = FC_FID_FLOGI;
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break;
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case ELS_LOGO:
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fc_logo_fill(lport, fp);
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*did = FC_FID_FLOGI;
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/*
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* if rport is valid then it
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* is port logo, therefore
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* set did to rport id.
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*/
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if (rport)
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*did = rport->port_id;
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break;
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case ELS_RTV:
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fc_rtv_fill(lport, fp);
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*did = rport->port_id;
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break;
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case ELS_REC:
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fc_rec_fill(lport, fp);
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*did = rport->port_id;
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break;
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case ELS_PRLI:
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fc_prli_fill(lport, fp);
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*did = rport->port_id;
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break;
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case ELS_SCR:
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fc_scr_fill(lport, fp);
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*did = FC_FID_FCTRL;
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break;
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default:
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FC_DBG("Invalid op code %x \n", op);
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return -EINVAL;
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}
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*r_ctl = FC_RCTL_ELS_REQ;
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*fh_type = FC_TYPE_ELS;
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return 0;
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}
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#endif /* _FC_ENCODE_H_ */
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