[SCSI] libfc: fix handling of incoming Discover Address (ADISC) requests
[deliverable/linux.git] / include / scsi / fc_encode.h
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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 } payload;
36};
37
38/**
39 * fill FC header fields in specified fc_frame
40 */
41static inline void fc_fill_fc_hdr(struct fc_frame *fp, enum fc_rctl r_ctl,
42 u32 did, u32 sid, enum fc_fh_type type,
43 u32 f_ctl, u32 parm_offset)
44{
45 struct fc_frame_header *fh;
46
47 fh = fc_frame_header_get(fp);
48 WARN_ON(r_ctl == 0);
49 fh->fh_r_ctl = r_ctl;
50 hton24(fh->fh_d_id, did);
51 hton24(fh->fh_s_id, sid);
52 fh->fh_type = type;
53 hton24(fh->fh_f_ctl, f_ctl);
54 fh->fh_cs_ctl = 0;
55 fh->fh_df_ctl = 0;
56 fh->fh_parm_offset = htonl(parm_offset);
57}
58
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59/**
60 * fc_adisc_fill() - Fill in adisc request frame
61 * @lport: local port.
62 * @fp: fc frame where payload will be placed.
63 */
64static inline void fc_adisc_fill(struct fc_lport *lport, struct fc_frame *fp)
65{
66 struct fc_els_adisc *adisc;
67
68 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
69 memset(adisc, 0, sizeof(*adisc));
70 adisc->adisc_cmd = ELS_ADISC;
71 put_unaligned_be64(lport->wwpn, &adisc->adisc_wwpn);
72 put_unaligned_be64(lport->wwnn, &adisc->adisc_wwnn);
73 hton24(adisc->adisc_port_id, fc_host_port_id(lport->host));
74}
75
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76/**
77 * fc_ct_hdr_fill- fills ct header and reset ct payload
78 * returns pointer to ct request.
79 */
80static inline struct fc_ct_req *fc_ct_hdr_fill(const struct fc_frame *fp,
81 unsigned int op, size_t req_size)
82{
83 struct fc_ct_req *ct;
84 size_t ct_plen;
85
86 ct_plen = sizeof(struct fc_ct_hdr) + req_size;
87 ct = fc_frame_payload_get(fp, ct_plen);
88 memset(ct, 0, ct_plen);
89 ct->hdr.ct_rev = FC_CT_REV;
90 ct->hdr.ct_fs_type = FC_FST_DIR;
91 ct->hdr.ct_fs_subtype = FC_NS_SUBTYPE;
92 ct->hdr.ct_cmd = htons((u16) op);
93 return ct;
94}
95
96/**
97 * fc_ct_fill - Fill in a name service request frame
98 */
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99static inline int fc_ct_fill(struct fc_lport *lport,
100 struct fc_frame *fp,
101 unsigned int op, enum fc_rctl *r_ctl,
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102 enum fc_fh_type *fh_type)
103{
104 struct fc_ct_req *ct;
105
106 switch (op) {
107 case FC_NS_GPN_FT:
108 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_gid_ft));
109 ct->payload.gid.fn_fc4_type = FC_TYPE_FCP;
110 break;
111
112 case FC_NS_RFT_ID:
113 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rft));
114 hton24(ct->payload.rft.fid.fp_fid,
115 fc_host_port_id(lport->host));
116 ct->payload.rft.fts = lport->fcts;
117 break;
118
119 case FC_NS_RPN_ID:
120 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rn_id));
121 hton24(ct->payload.rn.fr_fid.fp_fid,
122 fc_host_port_id(lport->host));
123 ct->payload.rft.fts = lport->fcts;
124 put_unaligned_be64(lport->wwpn, &ct->payload.rn.fr_wwn);
125 break;
126
127 default:
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128 return -EINVAL;
129 }
130 *r_ctl = FC_RCTL_DD_UNSOL_CTL;
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131 *fh_type = FC_TYPE_CT;
132 return 0;
133}
134
135/**
136 * fc_plogi_fill - Fill in plogi request frame
137 */
138static inline void fc_plogi_fill(struct fc_lport *lport, struct fc_frame *fp,
139 unsigned int op)
140{
141 struct fc_els_flogi *plogi;
142 struct fc_els_csp *csp;
143 struct fc_els_cssp *cp;
144
145 plogi = fc_frame_payload_get(fp, sizeof(*plogi));
146 memset(plogi, 0, sizeof(*plogi));
147 plogi->fl_cmd = (u8) op;
148 put_unaligned_be64(lport->wwpn, &plogi->fl_wwpn);
149 put_unaligned_be64(lport->wwnn, &plogi->fl_wwnn);
150
151 csp = &plogi->fl_csp;
152 csp->sp_hi_ver = 0x20;
153 csp->sp_lo_ver = 0x20;
154 csp->sp_bb_cred = htons(10); /* this gets set by gateway */
155 csp->sp_bb_data = htons((u16) lport->mfs);
156 cp = &plogi->fl_cssp[3 - 1]; /* class 3 parameters */
157 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
158 csp->sp_features = htons(FC_SP_FT_CIRO);
159 csp->sp_tot_seq = htons(255); /* seq. we accept */
160 csp->sp_rel_off = htons(0x1f);
161 csp->sp_e_d_tov = htonl(lport->e_d_tov);
162
163 cp->cp_rdfs = htons((u16) lport->mfs);
164 cp->cp_con_seq = htons(255);
165 cp->cp_open_seq = 1;
166}
167
168/**
169 * fc_flogi_fill - Fill in a flogi request frame.
170 */
171static inline void fc_flogi_fill(struct fc_lport *lport, struct fc_frame *fp)
172{
173 struct fc_els_csp *sp;
174 struct fc_els_cssp *cp;
175 struct fc_els_flogi *flogi;
176
177 flogi = fc_frame_payload_get(fp, sizeof(*flogi));
178 memset(flogi, 0, sizeof(*flogi));
179 flogi->fl_cmd = (u8) ELS_FLOGI;
180 put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
181 put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
182 sp = &flogi->fl_csp;
183 sp->sp_hi_ver = 0x20;
184 sp->sp_lo_ver = 0x20;
185 sp->sp_bb_cred = htons(10); /* this gets set by gateway */
186 sp->sp_bb_data = htons((u16) lport->mfs);
187 cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
188 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
189}
190
191/**
192 * fc_logo_fill - Fill in a logo request frame.
193 */
194static inline void fc_logo_fill(struct fc_lport *lport, struct fc_frame *fp)
195{
196 struct fc_els_logo *logo;
197
198 logo = fc_frame_payload_get(fp, sizeof(*logo));
199 memset(logo, 0, sizeof(*logo));
200 logo->fl_cmd = ELS_LOGO;
201 hton24(logo->fl_n_port_id, fc_host_port_id(lport->host));
202 logo->fl_n_port_wwn = htonll(lport->wwpn);
203}
204
205/**
206 * fc_rtv_fill - Fill in RTV (read timeout value) request frame.
207 */
208static inline void fc_rtv_fill(struct fc_lport *lport, struct fc_frame *fp)
209{
210 struct fc_els_rtv *rtv;
211
212 rtv = fc_frame_payload_get(fp, sizeof(*rtv));
213 memset(rtv, 0, sizeof(*rtv));
214 rtv->rtv_cmd = ELS_RTV;
215}
216
217/**
218 * fc_rec_fill - Fill in rec request frame
219 */
220static inline void fc_rec_fill(struct fc_lport *lport, struct fc_frame *fp)
221{
222 struct fc_els_rec *rec;
223 struct fc_exch *ep = fc_seq_exch(fr_seq(fp));
224
225 rec = fc_frame_payload_get(fp, sizeof(*rec));
226 memset(rec, 0, sizeof(*rec));
227 rec->rec_cmd = ELS_REC;
228 hton24(rec->rec_s_id, fc_host_port_id(lport->host));
229 rec->rec_ox_id = htons(ep->oxid);
230 rec->rec_rx_id = htons(ep->rxid);
231}
232
233/**
234 * fc_prli_fill - Fill in prli request frame
235 */
236static inline void fc_prli_fill(struct fc_lport *lport, struct fc_frame *fp)
237{
238 struct {
239 struct fc_els_prli prli;
240 struct fc_els_spp spp;
241 } *pp;
242
243 pp = fc_frame_payload_get(fp, sizeof(*pp));
244 memset(pp, 0, sizeof(*pp));
245 pp->prli.prli_cmd = ELS_PRLI;
246 pp->prli.prli_spp_len = sizeof(struct fc_els_spp);
247 pp->prli.prli_len = htons(sizeof(*pp));
248 pp->spp.spp_type = FC_TYPE_FCP;
249 pp->spp.spp_flags = FC_SPP_EST_IMG_PAIR;
250 pp->spp.spp_params = htonl(lport->service_params);
251}
252
253/**
254 * fc_scr_fill - Fill in a scr request frame.
255 */
256static inline void fc_scr_fill(struct fc_lport *lport, struct fc_frame *fp)
257{
258 struct fc_els_scr *scr;
259
260 scr = fc_frame_payload_get(fp, sizeof(*scr));
261 memset(scr, 0, sizeof(*scr));
262 scr->scr_cmd = ELS_SCR;
263 scr->scr_reg_func = ELS_SCRF_FULL;
264}
265
266/**
267 * fc_els_fill - Fill in an ELS request frame
268 */
9fb9d328 269static inline int fc_els_fill(struct fc_lport *lport,
a46f327a 270 u32 did,
42e9a92f 271 struct fc_frame *fp, unsigned int op,
a46f327a 272 enum fc_rctl *r_ctl, enum fc_fh_type *fh_type)
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273{
274 switch (op) {
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275 case ELS_ADISC:
276 fc_adisc_fill(lport, fp);
277 break;
278
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279 case ELS_PLOGI:
280 fc_plogi_fill(lport, fp, ELS_PLOGI);
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281 break;
282
283 case ELS_FLOGI:
284 fc_flogi_fill(lport, fp);
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285 break;
286
287 case ELS_LOGO:
288 fc_logo_fill(lport, fp);
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289 break;
290
291 case ELS_RTV:
292 fc_rtv_fill(lport, fp);
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293 break;
294
295 case ELS_REC:
296 fc_rec_fill(lport, fp);
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297 break;
298
299 case ELS_PRLI:
300 fc_prli_fill(lport, fp);
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301 break;
302
303 case ELS_SCR:
304 fc_scr_fill(lport, fp);
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305 break;
306
307 default:
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308 return -EINVAL;
309 }
310
311 *r_ctl = FC_RCTL_ELS_REQ;
312 *fh_type = FC_TYPE_ELS;
313 return 0;
314}
315#endif /* _FC_ENCODE_H_ */
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