Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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_rff_id rff;
36 struct fc_ns_fid fid;
37 struct fc_ns_rsnn snn;
38 struct fc_ns_rspn spn;
39 } payload;
40};
41
42/**
43 * fill FC header fields in specified fc_frame
44 */
45static inline void fc_fill_fc_hdr(struct fc_frame *fp, enum fc_rctl r_ctl,
46 u32 did, u32 sid, enum fc_fh_type type,
47 u32 f_ctl, u32 parm_offset)
48{
49 struct fc_frame_header *fh;
50
51 fh = fc_frame_header_get(fp);
52 WARN_ON(r_ctl == 0);
53 fh->fh_r_ctl = r_ctl;
54 hton24(fh->fh_d_id, did);
55 hton24(fh->fh_s_id, sid);
56 fh->fh_type = type;
57 hton24(fh->fh_f_ctl, f_ctl);
58 fh->fh_cs_ctl = 0;
59 fh->fh_df_ctl = 0;
60 fh->fh_parm_offset = htonl(parm_offset);
61}
62
63/**
64 * fc_adisc_fill() - Fill in adisc request frame
65 * @lport: local port.
66 * @fp: fc frame where payload will be placed.
67 */
68static inline void fc_adisc_fill(struct fc_lport *lport, struct fc_frame *fp)
69{
70 struct fc_els_adisc *adisc;
71
72 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
73 memset(adisc, 0, sizeof(*adisc));
74 adisc->adisc_cmd = ELS_ADISC;
75 put_unaligned_be64(lport->wwpn, &adisc->adisc_wwpn);
76 put_unaligned_be64(lport->wwnn, &adisc->adisc_wwnn);
77 hton24(adisc->adisc_port_id, fc_host_port_id(lport->host));
78}
79
80/**
81 * fc_ct_hdr_fill- fills ct header and reset ct payload
82 * returns pointer to ct request.
83 */
84static inline struct fc_ct_req *fc_ct_hdr_fill(const struct fc_frame *fp,
85 unsigned int op, size_t req_size)
86{
87 struct fc_ct_req *ct;
88 size_t ct_plen;
89
90 ct_plen = sizeof(struct fc_ct_hdr) + req_size;
91 ct = fc_frame_payload_get(fp, ct_plen);
92 memset(ct, 0, ct_plen);
93 ct->hdr.ct_rev = FC_CT_REV;
94 ct->hdr.ct_fs_type = FC_FST_DIR;
95 ct->hdr.ct_fs_subtype = FC_NS_SUBTYPE;
96 ct->hdr.ct_cmd = htons((u16) op);
97 return ct;
98}
99
100/**
101 * fc_ct_fill() - Fill in a name service request frame
102 * @lport: local port.
103 * @fc_id: FC_ID of non-destination rport for GPN_ID and similar inquiries.
104 * @fp: frame to contain payload.
105 * @op: CT opcode.
106 * @r_ctl: pointer to FC header R_CTL.
107 * @fh_type: pointer to FC-4 type.
108 */
109static inline int fc_ct_fill(struct fc_lport *lport,
110 u32 fc_id, struct fc_frame *fp,
111 unsigned int op, enum fc_rctl *r_ctl,
112 enum fc_fh_type *fh_type)
113{
114 struct fc_ct_req *ct;
115 size_t len;
116
117 switch (op) {
118 case FC_NS_GPN_FT:
119 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_gid_ft));
120 ct->payload.gid.fn_fc4_type = FC_TYPE_FCP;
121 break;
122
123 case FC_NS_GPN_ID:
124 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_fid));
125 hton24(ct->payload.fid.fp_fid, fc_id);
126 break;
127
128 case FC_NS_RFT_ID:
129 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rft));
130 hton24(ct->payload.rft.fid.fp_fid,
131 fc_host_port_id(lport->host));
132 ct->payload.rft.fts = lport->fcts;
133 break;
134
135 case FC_NS_RFF_ID:
136 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rff_id));
137 hton24(ct->payload.rff.fr_fid.fp_fid,
138 fc_host_port_id(lport->host));
139 ct->payload.rff.fr_type = FC_TYPE_FCP;
140 if (lport->service_params & FCP_SPPF_INIT_FCN)
141 ct->payload.rff.fr_feat = FCP_FEAT_INIT;
142 if (lport->service_params & FCP_SPPF_TARG_FCN)
143 ct->payload.rff.fr_feat |= FCP_FEAT_TARG;
144 break;
145
146 case FC_NS_RNN_ID:
147 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rn_id));
148 hton24(ct->payload.rn.fr_fid.fp_fid,
149 fc_host_port_id(lport->host));
150 put_unaligned_be64(lport->wwnn, &ct->payload.rn.fr_wwn);
151 break;
152
153 case FC_NS_RSPN_ID:
154 len = strnlen(fc_host_symbolic_name(lport->host), 255);
155 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rspn) + len);
156 hton24(ct->payload.spn.fr_fid.fp_fid,
157 fc_host_port_id(lport->host));
158 strncpy(ct->payload.spn.fr_name,
159 fc_host_symbolic_name(lport->host), len);
160 ct->payload.spn.fr_name_len = len;
161 break;
162
163 case FC_NS_RSNN_NN:
164 len = strnlen(fc_host_symbolic_name(lport->host), 255);
165 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rsnn) + len);
166 put_unaligned_be64(lport->wwnn, &ct->payload.snn.fr_wwn);
167 strncpy(ct->payload.snn.fr_name,
168 fc_host_symbolic_name(lport->host), len);
169 ct->payload.snn.fr_name_len = len;
170 break;
171
172 default:
173 return -EINVAL;
174 }
175 *r_ctl = FC_RCTL_DD_UNSOL_CTL;
176 *fh_type = FC_TYPE_CT;
177 return 0;
178}
179
180/**
181 * fc_plogi_fill - Fill in plogi request frame
182 */
183static inline void fc_plogi_fill(struct fc_lport *lport, struct fc_frame *fp,
184 unsigned int op)
185{
186 struct fc_els_flogi *plogi;
187 struct fc_els_csp *csp;
188 struct fc_els_cssp *cp;
189
190 plogi = fc_frame_payload_get(fp, sizeof(*plogi));
191 memset(plogi, 0, sizeof(*plogi));
192 plogi->fl_cmd = (u8) op;
193 put_unaligned_be64(lport->wwpn, &plogi->fl_wwpn);
194 put_unaligned_be64(lport->wwnn, &plogi->fl_wwnn);
195
196 csp = &plogi->fl_csp;
197 csp->sp_hi_ver = 0x20;
198 csp->sp_lo_ver = 0x20;
199 csp->sp_bb_cred = htons(10); /* this gets set by gateway */
200 csp->sp_bb_data = htons((u16) lport->mfs);
201 cp = &plogi->fl_cssp[3 - 1]; /* class 3 parameters */
202 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
203 csp->sp_features = htons(FC_SP_FT_CIRO);
204 csp->sp_tot_seq = htons(255); /* seq. we accept */
205 csp->sp_rel_off = htons(0x1f);
206 csp->sp_e_d_tov = htonl(lport->e_d_tov);
207
208 cp->cp_rdfs = htons((u16) lport->mfs);
209 cp->cp_con_seq = htons(255);
210 cp->cp_open_seq = 1;
211}
212
213/**
214 * fc_flogi_fill - Fill in a flogi request frame.
215 */
216static inline void fc_flogi_fill(struct fc_lport *lport, struct fc_frame *fp)
217{
218 struct fc_els_csp *sp;
219 struct fc_els_cssp *cp;
220 struct fc_els_flogi *flogi;
221
222 flogi = fc_frame_payload_get(fp, sizeof(*flogi));
223 memset(flogi, 0, sizeof(*flogi));
224 flogi->fl_cmd = (u8) ELS_FLOGI;
225 put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
226 put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
227 sp = &flogi->fl_csp;
228 sp->sp_hi_ver = 0x20;
229 sp->sp_lo_ver = 0x20;
230 sp->sp_bb_cred = htons(10); /* this gets set by gateway */
231 sp->sp_bb_data = htons((u16) lport->mfs);
232 cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
233 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
234 if (lport->does_npiv)
235 sp->sp_features = htons(FC_SP_FT_NPIV);
236}
237
238/**
239 * fc_fdisc_fill - Fill in a fdisc request frame.
240 */
241static inline void fc_fdisc_fill(struct fc_lport *lport, struct fc_frame *fp)
242{
243 struct fc_els_csp *sp;
244 struct fc_els_cssp *cp;
245 struct fc_els_flogi *fdisc;
246
247 fdisc = fc_frame_payload_get(fp, sizeof(*fdisc));
248 memset(fdisc, 0, sizeof(*fdisc));
249 fdisc->fl_cmd = (u8) ELS_FDISC;
250 put_unaligned_be64(lport->wwpn, &fdisc->fl_wwpn);
251 put_unaligned_be64(lport->wwnn, &fdisc->fl_wwnn);
252 sp = &fdisc->fl_csp;
253 sp->sp_hi_ver = 0x20;
254 sp->sp_lo_ver = 0x20;
255 sp->sp_bb_cred = htons(10); /* this gets set by gateway */
256 sp->sp_bb_data = htons((u16) lport->mfs);
257 cp = &fdisc->fl_cssp[3 - 1]; /* class 3 parameters */
258 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
259}
260
261/**
262 * fc_logo_fill - Fill in a logo request frame.
263 */
264static inline void fc_logo_fill(struct fc_lport *lport, struct fc_frame *fp)
265{
266 struct fc_els_logo *logo;
267
268 logo = fc_frame_payload_get(fp, sizeof(*logo));
269 memset(logo, 0, sizeof(*logo));
270 logo->fl_cmd = ELS_LOGO;
271 hton24(logo->fl_n_port_id, fc_host_port_id(lport->host));
272 logo->fl_n_port_wwn = htonll(lport->wwpn);
273}
274
275/**
276 * fc_rtv_fill - Fill in RTV (read timeout value) request frame.
277 */
278static inline void fc_rtv_fill(struct fc_lport *lport, struct fc_frame *fp)
279{
280 struct fc_els_rtv *rtv;
281
282 rtv = fc_frame_payload_get(fp, sizeof(*rtv));
283 memset(rtv, 0, sizeof(*rtv));
284 rtv->rtv_cmd = ELS_RTV;
285}
286
287/**
288 * fc_rec_fill - Fill in rec request frame
289 */
290static inline void fc_rec_fill(struct fc_lport *lport, struct fc_frame *fp)
291{
292 struct fc_els_rec *rec;
293 struct fc_exch *ep = fc_seq_exch(fr_seq(fp));
294
295 rec = fc_frame_payload_get(fp, sizeof(*rec));
296 memset(rec, 0, sizeof(*rec));
297 rec->rec_cmd = ELS_REC;
298 hton24(rec->rec_s_id, fc_host_port_id(lport->host));
299 rec->rec_ox_id = htons(ep->oxid);
300 rec->rec_rx_id = htons(ep->rxid);
301}
302
303/**
304 * fc_prli_fill - Fill in prli request frame
305 */
306static inline void fc_prli_fill(struct fc_lport *lport, struct fc_frame *fp)
307{
308 struct {
309 struct fc_els_prli prli;
310 struct fc_els_spp spp;
311 } *pp;
312
313 pp = fc_frame_payload_get(fp, sizeof(*pp));
314 memset(pp, 0, sizeof(*pp));
315 pp->prli.prli_cmd = ELS_PRLI;
316 pp->prli.prli_spp_len = sizeof(struct fc_els_spp);
317 pp->prli.prli_len = htons(sizeof(*pp));
318 pp->spp.spp_type = FC_TYPE_FCP;
319 pp->spp.spp_flags = FC_SPP_EST_IMG_PAIR;
320 pp->spp.spp_params = htonl(lport->service_params);
321}
322
323/**
324 * fc_scr_fill - Fill in a scr request frame.
325 */
326static inline void fc_scr_fill(struct fc_lport *lport, struct fc_frame *fp)
327{
328 struct fc_els_scr *scr;
329
330 scr = fc_frame_payload_get(fp, sizeof(*scr));
331 memset(scr, 0, sizeof(*scr));
332 scr->scr_cmd = ELS_SCR;
333 scr->scr_reg_func = ELS_SCRF_FULL;
334}
335
336/**
337 * fc_els_fill - Fill in an ELS request frame
338 */
339static inline int fc_els_fill(struct fc_lport *lport,
340 u32 did,
341 struct fc_frame *fp, unsigned int op,
342 enum fc_rctl *r_ctl, enum fc_fh_type *fh_type)
343{
344 switch (op) {
345 case ELS_ADISC:
346 fc_adisc_fill(lport, fp);
347 break;
348
349 case ELS_PLOGI:
350 fc_plogi_fill(lport, fp, ELS_PLOGI);
351 break;
352
353 case ELS_FLOGI:
354 fc_flogi_fill(lport, fp);
355 break;
356
357 case ELS_FDISC:
358 fc_fdisc_fill(lport, fp);
359 break;
360
361 case ELS_LOGO:
362 fc_logo_fill(lport, fp);
363 break;
364
365 case ELS_RTV:
366 fc_rtv_fill(lport, fp);
367 break;
368
369 case ELS_REC:
370 fc_rec_fill(lport, fp);
371 break;
372
373 case ELS_PRLI:
374 fc_prli_fill(lport, fp);
375 break;
376
377 case ELS_SCR:
378 fc_scr_fill(lport, fp);
379 break;
380
381 default:
382 return -EINVAL;
383 }
384
385 *r_ctl = FC_RCTL_ELS_REQ;
386 *fh_type = FC_TYPE_ELS;
387 return 0;
388}
389#endif /* _FC_ENCODE_H_ */