Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright(c) 2008 Intel Corporation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
16 *
17 * Maintained at www.Open-FCoE.org
18 */
19
20#ifndef _FC_ENCODE_H_
21#define _FC_ENCODE_H_
22#include <asm/unaligned.h>
23
24struct fc_ns_rft {
25 struct fc_ns_fid fid; /* port ID object */
26 struct fc_ns_fts fts; /* FC4-types object */
27};
28
29struct fc_ct_req {
30 struct fc_ct_hdr hdr;
31 union {
32 struct fc_ns_gid_ft gid;
33 struct fc_ns_rn_id rn;
34 struct fc_ns_rft rft;
35 struct fc_ns_fid fid;
36 } payload;
37};
38
39/**
40 * fill FC header fields in specified fc_frame
41 */
42static inline void fc_fill_fc_hdr(struct fc_frame *fp, enum fc_rctl r_ctl,
43 u32 did, u32 sid, enum fc_fh_type type,
44 u32 f_ctl, u32 parm_offset)
45{
46 struct fc_frame_header *fh;
47
48 fh = fc_frame_header_get(fp);
49 WARN_ON(r_ctl == 0);
50 fh->fh_r_ctl = r_ctl;
51 hton24(fh->fh_d_id, did);
52 hton24(fh->fh_s_id, sid);
53 fh->fh_type = type;
54 hton24(fh->fh_f_ctl, f_ctl);
55 fh->fh_cs_ctl = 0;
56 fh->fh_df_ctl = 0;
57 fh->fh_parm_offset = htonl(parm_offset);
58}
59
60/**
61 * fc_adisc_fill() - Fill in adisc request frame
62 * @lport: local port.
63 * @fp: fc frame where payload will be placed.
64 */
65static inline void fc_adisc_fill(struct fc_lport *lport, struct fc_frame *fp)
66{
67 struct fc_els_adisc *adisc;
68
69 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
70 memset(adisc, 0, sizeof(*adisc));
71 adisc->adisc_cmd = ELS_ADISC;
72 put_unaligned_be64(lport->wwpn, &adisc->adisc_wwpn);
73 put_unaligned_be64(lport->wwnn, &adisc->adisc_wwnn);
74 hton24(adisc->adisc_port_id, fc_host_port_id(lport->host));
75}
76
77/**
78 * fc_ct_hdr_fill- fills ct header and reset ct payload
79 * returns pointer to ct request.
80 */
81static inline struct fc_ct_req *fc_ct_hdr_fill(const struct fc_frame *fp,
82 unsigned int op, size_t req_size)
83{
84 struct fc_ct_req *ct;
85 size_t ct_plen;
86
87 ct_plen = sizeof(struct fc_ct_hdr) + req_size;
88 ct = fc_frame_payload_get(fp, ct_plen);
89 memset(ct, 0, ct_plen);
90 ct->hdr.ct_rev = FC_CT_REV;
91 ct->hdr.ct_fs_type = FC_FST_DIR;
92 ct->hdr.ct_fs_subtype = FC_NS_SUBTYPE;
93 ct->hdr.ct_cmd = htons((u16) op);
94 return ct;
95}
96
97/**
98 * fc_ct_fill() - Fill in a name service request frame
99 * @lport: local port.
100 * @fc_id: FC_ID of non-destination rport for GPN_ID and similar inquiries.
101 * @fp: frame to contain payload.
102 * @op: CT opcode.
103 * @r_ctl: pointer to FC header R_CTL.
104 * @fh_type: pointer to FC-4 type.
105 */
106static inline int fc_ct_fill(struct fc_lport *lport,
107 u32 fc_id, struct fc_frame *fp,
108 unsigned int op, enum fc_rctl *r_ctl,
109 enum fc_fh_type *fh_type)
110{
111 struct fc_ct_req *ct;
112
113 switch (op) {
114 case FC_NS_GPN_FT:
115 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_gid_ft));
116 ct->payload.gid.fn_fc4_type = FC_TYPE_FCP;
117 break;
118
119 case FC_NS_GPN_ID:
120 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_fid));
121 hton24(ct->payload.fid.fp_fid, fc_id);
122 break;
123
124 case FC_NS_RFT_ID:
125 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rft));
126 hton24(ct->payload.rft.fid.fp_fid,
127 fc_host_port_id(lport->host));
128 ct->payload.rft.fts = lport->fcts;
129 break;
130
131 case FC_NS_RPN_ID:
132 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rn_id));
133 hton24(ct->payload.rn.fr_fid.fp_fid,
134 fc_host_port_id(lport->host));
135 ct->payload.rft.fts = lport->fcts;
136 put_unaligned_be64(lport->wwpn, &ct->payload.rn.fr_wwn);
137 break;
138
139 default:
140 return -EINVAL;
141 }
142 *r_ctl = FC_RCTL_DD_UNSOL_CTL;
143 *fh_type = FC_TYPE_CT;
144 return 0;
145}
146
147/**
148 * fc_plogi_fill - Fill in plogi request frame
149 */
150static inline void fc_plogi_fill(struct fc_lport *lport, struct fc_frame *fp,
151 unsigned int op)
152{
153 struct fc_els_flogi *plogi;
154 struct fc_els_csp *csp;
155 struct fc_els_cssp *cp;
156
157 plogi = fc_frame_payload_get(fp, sizeof(*plogi));
158 memset(plogi, 0, sizeof(*plogi));
159 plogi->fl_cmd = (u8) op;
160 put_unaligned_be64(lport->wwpn, &plogi->fl_wwpn);
161 put_unaligned_be64(lport->wwnn, &plogi->fl_wwnn);
162
163 csp = &plogi->fl_csp;
164 csp->sp_hi_ver = 0x20;
165 csp->sp_lo_ver = 0x20;
166 csp->sp_bb_cred = htons(10); /* this gets set by gateway */
167 csp->sp_bb_data = htons((u16) lport->mfs);
168 cp = &plogi->fl_cssp[3 - 1]; /* class 3 parameters */
169 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
170 csp->sp_features = htons(FC_SP_FT_CIRO);
171 csp->sp_tot_seq = htons(255); /* seq. we accept */
172 csp->sp_rel_off = htons(0x1f);
173 csp->sp_e_d_tov = htonl(lport->e_d_tov);
174
175 cp->cp_rdfs = htons((u16) lport->mfs);
176 cp->cp_con_seq = htons(255);
177 cp->cp_open_seq = 1;
178}
179
180/**
181 * fc_flogi_fill - Fill in a flogi request frame.
182 */
183static inline void fc_flogi_fill(struct fc_lport *lport, struct fc_frame *fp)
184{
185 struct fc_els_csp *sp;
186 struct fc_els_cssp *cp;
187 struct fc_els_flogi *flogi;
188
189 flogi = fc_frame_payload_get(fp, sizeof(*flogi));
190 memset(flogi, 0, sizeof(*flogi));
191 flogi->fl_cmd = (u8) ELS_FLOGI;
192 put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
193 put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
194 sp = &flogi->fl_csp;
195 sp->sp_hi_ver = 0x20;
196 sp->sp_lo_ver = 0x20;
197 sp->sp_bb_cred = htons(10); /* this gets set by gateway */
198 sp->sp_bb_data = htons((u16) lport->mfs);
199 cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
200 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
201}
202
203/**
204 * fc_logo_fill - Fill in a logo request frame.
205 */
206static inline void fc_logo_fill(struct fc_lport *lport, struct fc_frame *fp)
207{
208 struct fc_els_logo *logo;
209
210 logo = fc_frame_payload_get(fp, sizeof(*logo));
211 memset(logo, 0, sizeof(*logo));
212 logo->fl_cmd = ELS_LOGO;
213 hton24(logo->fl_n_port_id, fc_host_port_id(lport->host));
214 logo->fl_n_port_wwn = htonll(lport->wwpn);
215}
216
217/**
218 * fc_rtv_fill - Fill in RTV (read timeout value) request frame.
219 */
220static inline void fc_rtv_fill(struct fc_lport *lport, struct fc_frame *fp)
221{
222 struct fc_els_rtv *rtv;
223
224 rtv = fc_frame_payload_get(fp, sizeof(*rtv));
225 memset(rtv, 0, sizeof(*rtv));
226 rtv->rtv_cmd = ELS_RTV;
227}
228
229/**
230 * fc_rec_fill - Fill in rec request frame
231 */
232static inline void fc_rec_fill(struct fc_lport *lport, struct fc_frame *fp)
233{
234 struct fc_els_rec *rec;
235 struct fc_exch *ep = fc_seq_exch(fr_seq(fp));
236
237 rec = fc_frame_payload_get(fp, sizeof(*rec));
238 memset(rec, 0, sizeof(*rec));
239 rec->rec_cmd = ELS_REC;
240 hton24(rec->rec_s_id, fc_host_port_id(lport->host));
241 rec->rec_ox_id = htons(ep->oxid);
242 rec->rec_rx_id = htons(ep->rxid);
243}
244
245/**
246 * fc_prli_fill - Fill in prli request frame
247 */
248static inline void fc_prli_fill(struct fc_lport *lport, struct fc_frame *fp)
249{
250 struct {
251 struct fc_els_prli prli;
252 struct fc_els_spp spp;
253 } *pp;
254
255 pp = fc_frame_payload_get(fp, sizeof(*pp));
256 memset(pp, 0, sizeof(*pp));
257 pp->prli.prli_cmd = ELS_PRLI;
258 pp->prli.prli_spp_len = sizeof(struct fc_els_spp);
259 pp->prli.prli_len = htons(sizeof(*pp));
260 pp->spp.spp_type = FC_TYPE_FCP;
261 pp->spp.spp_flags = FC_SPP_EST_IMG_PAIR;
262 pp->spp.spp_params = htonl(lport->service_params);
263}
264
265/**
266 * fc_scr_fill - Fill in a scr request frame.
267 */
268static inline void fc_scr_fill(struct fc_lport *lport, struct fc_frame *fp)
269{
270 struct fc_els_scr *scr;
271
272 scr = fc_frame_payload_get(fp, sizeof(*scr));
273 memset(scr, 0, sizeof(*scr));
274 scr->scr_cmd = ELS_SCR;
275 scr->scr_reg_func = ELS_SCRF_FULL;
276}
277
278/**
279 * fc_els_fill - Fill in an ELS request frame
280 */
281static inline int fc_els_fill(struct fc_lport *lport,
282 u32 did,
283 struct fc_frame *fp, unsigned int op,
284 enum fc_rctl *r_ctl, enum fc_fh_type *fh_type)
285{
286 switch (op) {
287 case ELS_ADISC:
288 fc_adisc_fill(lport, fp);
289 break;
290
291 case ELS_PLOGI:
292 fc_plogi_fill(lport, fp, ELS_PLOGI);
293 break;
294
295 case ELS_FLOGI:
296 fc_flogi_fill(lport, fp);
297 break;
298
299 case ELS_LOGO:
300 fc_logo_fill(lport, fp);
301 break;
302
303 case ELS_RTV:
304 fc_rtv_fill(lport, fp);
305 break;
306
307 case ELS_REC:
308 fc_rec_fill(lport, fp);
309 break;
310
311 case ELS_PRLI:
312 fc_prli_fill(lport, fp);
313 break;
314
315 case ELS_SCR:
316 fc_scr_fill(lport, fp);
317 break;
318
319 default:
320 return -EINVAL;
321 }
322
323 *r_ctl = FC_RCTL_ELS_REQ;
324 *fh_type = FC_TYPE_ELS;
325 return 0;
326}
327#endif /* _FC_ENCODE_H_ */