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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 | |
24 | struct fc_ns_rft { |
25 | struct fc_ns_fid fid; /* port ID object */ |
26 | struct fc_ns_fts fts; /* FC4-types object */ |
27 | }; |
28 | |
29 | struct 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 | */ |
45 | static 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 | */ |
68 | static 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 | */ |
84 | static 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 | */ |
109 | static 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 | */ |
183 | static 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 | */ |
216 | static 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 | */ |
241 | static 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 | */ |
264 | static 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 | */ |
278 | static 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 | */ |
290 | static 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 | */ |
306 | static 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 | */ |
326 | static 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 | */ |
339 | static 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_ */ |
390 |
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