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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 | /* |
25 | * F_CTL values for simple requests and responses. |
26 | */ |
27 | #define FC_FCTL_REQ (FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT) |
28 | #define FC_FCTL_RESP (FC_FC_EX_CTX | FC_FC_LAST_SEQ | \ |
29 | FC_FC_END_SEQ | FC_FC_SEQ_INIT) |
30 | |
31 | struct fc_ns_rft { |
32 | struct fc_ns_fid fid; /* port ID object */ |
33 | struct fc_ns_fts fts; /* FC4-types object */ |
34 | }; |
35 | |
36 | struct fc_ct_req { |
37 | struct fc_ct_hdr hdr; |
38 | union { |
39 | struct fc_ns_gid_ft gid; |
40 | struct fc_ns_rn_id rn; |
41 | struct fc_ns_rft rft; |
42 | struct fc_ns_rff_id rff; |
43 | struct fc_ns_fid fid; |
44 | struct fc_ns_rsnn snn; |
45 | struct fc_ns_rspn spn; |
46 | } payload; |
47 | }; |
48 | |
49 | static inline void __fc_fill_fc_hdr(struct fc_frame_header *fh, |
50 | enum fc_rctl r_ctl, |
51 | u32 did, u32 sid, enum fc_fh_type type, |
52 | u32 f_ctl, u32 parm_offset) |
53 | { |
54 | WARN_ON(r_ctl == 0); |
55 | fh->fh_r_ctl = r_ctl; |
56 | hton24(fh->fh_d_id, did); |
57 | hton24(fh->fh_s_id, sid); |
58 | fh->fh_type = type; |
59 | hton24(fh->fh_f_ctl, f_ctl); |
60 | fh->fh_cs_ctl = 0; |
61 | fh->fh_df_ctl = 0; |
62 | fh->fh_parm_offset = htonl(parm_offset); |
63 | } |
64 | |
65 | /** |
66 | * fill FC header fields in specified fc_frame |
67 | */ |
68 | static inline void fc_fill_fc_hdr(struct fc_frame *fp, enum fc_rctl r_ctl, |
69 | u32 did, u32 sid, enum fc_fh_type type, |
70 | u32 f_ctl, u32 parm_offset) |
71 | { |
72 | struct fc_frame_header *fh; |
73 | |
74 | fh = fc_frame_header_get(fp); |
75 | __fc_fill_fc_hdr(fh, r_ctl, did, sid, type, f_ctl, parm_offset); |
76 | } |
77 | |
78 | /** |
79 | * fc_adisc_fill() - Fill in adisc request frame |
80 | * @lport: local port. |
81 | * @fp: fc frame where payload will be placed. |
82 | */ |
83 | static inline void fc_adisc_fill(struct fc_lport *lport, struct fc_frame *fp) |
84 | { |
85 | struct fc_els_adisc *adisc; |
86 | |
87 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); |
88 | memset(adisc, 0, sizeof(*adisc)); |
89 | adisc->adisc_cmd = ELS_ADISC; |
90 | put_unaligned_be64(lport->wwpn, &adisc->adisc_wwpn); |
91 | put_unaligned_be64(lport->wwnn, &adisc->adisc_wwnn); |
92 | hton24(adisc->adisc_port_id, lport->port_id); |
93 | } |
94 | |
95 | /** |
96 | * fc_ct_hdr_fill- fills ct header and reset ct payload |
97 | * returns pointer to ct request. |
98 | */ |
99 | static inline struct fc_ct_req *fc_ct_hdr_fill(const struct fc_frame *fp, |
100 | unsigned int op, size_t req_size) |
101 | { |
102 | struct fc_ct_req *ct; |
103 | size_t ct_plen; |
104 | |
105 | ct_plen = sizeof(struct fc_ct_hdr) + req_size; |
106 | ct = fc_frame_payload_get(fp, ct_plen); |
107 | memset(ct, 0, ct_plen); |
108 | ct->hdr.ct_rev = FC_CT_REV; |
109 | ct->hdr.ct_fs_type = FC_FST_DIR; |
110 | ct->hdr.ct_fs_subtype = FC_NS_SUBTYPE; |
111 | ct->hdr.ct_cmd = htons((u16) op); |
112 | return ct; |
113 | } |
114 | |
115 | /** |
116 | * fc_ct_fill() - Fill in a name service request frame |
117 | * @lport: local port. |
118 | * @fc_id: FC_ID of non-destination rport for GPN_ID and similar inquiries. |
119 | * @fp: frame to contain payload. |
120 | * @op: CT opcode. |
121 | * @r_ctl: pointer to FC header R_CTL. |
122 | * @fh_type: pointer to FC-4 type. |
123 | */ |
124 | static inline int fc_ct_fill(struct fc_lport *lport, |
125 | u32 fc_id, struct fc_frame *fp, |
126 | unsigned int op, enum fc_rctl *r_ctl, |
127 | enum fc_fh_type *fh_type) |
128 | { |
129 | struct fc_ct_req *ct; |
130 | size_t len; |
131 | |
132 | switch (op) { |
133 | case FC_NS_GPN_FT: |
134 | ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_gid_ft)); |
135 | ct->payload.gid.fn_fc4_type = FC_TYPE_FCP; |
136 | break; |
137 | |
138 | case FC_NS_GPN_ID: |
139 | ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_fid)); |
140 | hton24(ct->payload.fid.fp_fid, fc_id); |
141 | break; |
142 | |
143 | case FC_NS_RFT_ID: |
144 | ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rft)); |
145 | hton24(ct->payload.rft.fid.fp_fid, lport->port_id); |
146 | ct->payload.rft.fts = lport->fcts; |
147 | break; |
148 | |
149 | case FC_NS_RFF_ID: |
150 | ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rff_id)); |
151 | hton24(ct->payload.rff.fr_fid.fp_fid, lport->port_id); |
152 | ct->payload.rff.fr_type = FC_TYPE_FCP; |
153 | if (lport->service_params & FCP_SPPF_INIT_FCN) |
154 | ct->payload.rff.fr_feat = FCP_FEAT_INIT; |
155 | if (lport->service_params & FCP_SPPF_TARG_FCN) |
156 | ct->payload.rff.fr_feat |= FCP_FEAT_TARG; |
157 | break; |
158 | |
159 | case FC_NS_RNN_ID: |
160 | ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rn_id)); |
161 | hton24(ct->payload.rn.fr_fid.fp_fid, lport->port_id); |
162 | put_unaligned_be64(lport->wwnn, &ct->payload.rn.fr_wwn); |
163 | break; |
164 | |
165 | case FC_NS_RSPN_ID: |
166 | len = strnlen(fc_host_symbolic_name(lport->host), 255); |
167 | ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rspn) + len); |
168 | hton24(ct->payload.spn.fr_fid.fp_fid, lport->port_id); |
169 | strncpy(ct->payload.spn.fr_name, |
170 | fc_host_symbolic_name(lport->host), len); |
171 | ct->payload.spn.fr_name_len = len; |
172 | break; |
173 | |
174 | case FC_NS_RSNN_NN: |
175 | len = strnlen(fc_host_symbolic_name(lport->host), 255); |
176 | ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rsnn) + len); |
177 | put_unaligned_be64(lport->wwnn, &ct->payload.snn.fr_wwn); |
178 | strncpy(ct->payload.snn.fr_name, |
179 | fc_host_symbolic_name(lport->host), len); |
180 | ct->payload.snn.fr_name_len = len; |
181 | break; |
182 | |
183 | default: |
184 | return -EINVAL; |
185 | } |
186 | *r_ctl = FC_RCTL_DD_UNSOL_CTL; |
187 | *fh_type = FC_TYPE_CT; |
188 | return 0; |
189 | } |
190 | |
191 | /** |
192 | * fc_plogi_fill - Fill in plogi request frame |
193 | */ |
194 | static inline void fc_plogi_fill(struct fc_lport *lport, struct fc_frame *fp, |
195 | unsigned int op) |
196 | { |
197 | struct fc_els_flogi *plogi; |
198 | struct fc_els_csp *csp; |
199 | struct fc_els_cssp *cp; |
200 | |
201 | plogi = fc_frame_payload_get(fp, sizeof(*plogi)); |
202 | memset(plogi, 0, sizeof(*plogi)); |
203 | plogi->fl_cmd = (u8) op; |
204 | put_unaligned_be64(lport->wwpn, &plogi->fl_wwpn); |
205 | put_unaligned_be64(lport->wwnn, &plogi->fl_wwnn); |
206 | |
207 | csp = &plogi->fl_csp; |
208 | csp->sp_hi_ver = 0x20; |
209 | csp->sp_lo_ver = 0x20; |
210 | csp->sp_bb_cred = htons(10); /* this gets set by gateway */ |
211 | csp->sp_bb_data = htons((u16) lport->mfs); |
212 | cp = &plogi->fl_cssp[3 - 1]; /* class 3 parameters */ |
213 | cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); |
214 | csp->sp_features = htons(FC_SP_FT_CIRO); |
215 | csp->sp_tot_seq = htons(255); /* seq. we accept */ |
216 | csp->sp_rel_off = htons(0x1f); |
217 | csp->sp_e_d_tov = htonl(lport->e_d_tov); |
218 | |
219 | cp->cp_rdfs = htons((u16) lport->mfs); |
220 | cp->cp_con_seq = htons(255); |
221 | cp->cp_open_seq = 1; |
222 | } |
223 | |
224 | /** |
225 | * fc_flogi_fill - Fill in a flogi request frame. |
226 | */ |
227 | static inline void fc_flogi_fill(struct fc_lport *lport, struct fc_frame *fp) |
228 | { |
229 | struct fc_els_csp *sp; |
230 | struct fc_els_cssp *cp; |
231 | struct fc_els_flogi *flogi; |
232 | |
233 | flogi = fc_frame_payload_get(fp, sizeof(*flogi)); |
234 | memset(flogi, 0, sizeof(*flogi)); |
235 | flogi->fl_cmd = (u8) ELS_FLOGI; |
236 | put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); |
237 | put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); |
238 | sp = &flogi->fl_csp; |
239 | sp->sp_hi_ver = 0x20; |
240 | sp->sp_lo_ver = 0x20; |
241 | sp->sp_bb_cred = htons(10); /* this gets set by gateway */ |
242 | sp->sp_bb_data = htons((u16) lport->mfs); |
243 | cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ |
244 | cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); |
245 | if (lport->does_npiv) |
246 | sp->sp_features = htons(FC_SP_FT_NPIV); |
247 | } |
248 | |
249 | /** |
250 | * fc_fdisc_fill - Fill in a fdisc request frame. |
251 | */ |
252 | static inline void fc_fdisc_fill(struct fc_lport *lport, struct fc_frame *fp) |
253 | { |
254 | struct fc_els_csp *sp; |
255 | struct fc_els_cssp *cp; |
256 | struct fc_els_flogi *fdisc; |
257 | |
258 | fdisc = fc_frame_payload_get(fp, sizeof(*fdisc)); |
259 | memset(fdisc, 0, sizeof(*fdisc)); |
260 | fdisc->fl_cmd = (u8) ELS_FDISC; |
261 | put_unaligned_be64(lport->wwpn, &fdisc->fl_wwpn); |
262 | put_unaligned_be64(lport->wwnn, &fdisc->fl_wwnn); |
263 | sp = &fdisc->fl_csp; |
264 | sp->sp_hi_ver = 0x20; |
265 | sp->sp_lo_ver = 0x20; |
266 | sp->sp_bb_cred = htons(10); /* this gets set by gateway */ |
267 | sp->sp_bb_data = htons((u16) lport->mfs); |
268 | cp = &fdisc->fl_cssp[3 - 1]; /* class 3 parameters */ |
269 | cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); |
270 | } |
271 | |
272 | /** |
273 | * fc_logo_fill - Fill in a logo request frame. |
274 | */ |
275 | static inline void fc_logo_fill(struct fc_lport *lport, struct fc_frame *fp) |
276 | { |
277 | struct fc_els_logo *logo; |
278 | |
279 | logo = fc_frame_payload_get(fp, sizeof(*logo)); |
280 | memset(logo, 0, sizeof(*logo)); |
281 | logo->fl_cmd = ELS_LOGO; |
282 | hton24(logo->fl_n_port_id, lport->port_id); |
283 | logo->fl_n_port_wwn = htonll(lport->wwpn); |
284 | } |
285 | |
286 | /** |
287 | * fc_rtv_fill - Fill in RTV (read timeout value) request frame. |
288 | */ |
289 | static inline void fc_rtv_fill(struct fc_lport *lport, struct fc_frame *fp) |
290 | { |
291 | struct fc_els_rtv *rtv; |
292 | |
293 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); |
294 | memset(rtv, 0, sizeof(*rtv)); |
295 | rtv->rtv_cmd = ELS_RTV; |
296 | } |
297 | |
298 | /** |
299 | * fc_rec_fill - Fill in rec request frame |
300 | */ |
301 | static inline void fc_rec_fill(struct fc_lport *lport, struct fc_frame *fp) |
302 | { |
303 | struct fc_els_rec *rec; |
304 | struct fc_exch *ep = fc_seq_exch(fr_seq(fp)); |
305 | |
306 | rec = fc_frame_payload_get(fp, sizeof(*rec)); |
307 | memset(rec, 0, sizeof(*rec)); |
308 | rec->rec_cmd = ELS_REC; |
309 | hton24(rec->rec_s_id, lport->port_id); |
310 | rec->rec_ox_id = htons(ep->oxid); |
311 | rec->rec_rx_id = htons(ep->rxid); |
312 | } |
313 | |
314 | /** |
315 | * fc_prli_fill - Fill in prli request frame |
316 | */ |
317 | static inline void fc_prli_fill(struct fc_lport *lport, struct fc_frame *fp) |
318 | { |
319 | struct { |
320 | struct fc_els_prli prli; |
321 | struct fc_els_spp spp; |
322 | } *pp; |
323 | |
324 | pp = fc_frame_payload_get(fp, sizeof(*pp)); |
325 | memset(pp, 0, sizeof(*pp)); |
326 | pp->prli.prli_cmd = ELS_PRLI; |
327 | pp->prli.prli_spp_len = sizeof(struct fc_els_spp); |
328 | pp->prli.prli_len = htons(sizeof(*pp)); |
329 | pp->spp.spp_type = FC_TYPE_FCP; |
330 | pp->spp.spp_flags = FC_SPP_EST_IMG_PAIR; |
331 | pp->spp.spp_params = htonl(lport->service_params); |
332 | } |
333 | |
334 | /** |
335 | * fc_scr_fill - Fill in a scr request frame. |
336 | */ |
337 | static inline void fc_scr_fill(struct fc_lport *lport, struct fc_frame *fp) |
338 | { |
339 | struct fc_els_scr *scr; |
340 | |
341 | scr = fc_frame_payload_get(fp, sizeof(*scr)); |
342 | memset(scr, 0, sizeof(*scr)); |
343 | scr->scr_cmd = ELS_SCR; |
344 | scr->scr_reg_func = ELS_SCRF_FULL; |
345 | } |
346 | |
347 | /** |
348 | * fc_els_fill - Fill in an ELS request frame |
349 | */ |
350 | static inline int fc_els_fill(struct fc_lport *lport, |
351 | u32 did, |
352 | struct fc_frame *fp, unsigned int op, |
353 | enum fc_rctl *r_ctl, enum fc_fh_type *fh_type) |
354 | { |
355 | switch (op) { |
356 | case ELS_ADISC: |
357 | fc_adisc_fill(lport, fp); |
358 | break; |
359 | |
360 | case ELS_PLOGI: |
361 | fc_plogi_fill(lport, fp, ELS_PLOGI); |
362 | break; |
363 | |
364 | case ELS_FLOGI: |
365 | fc_flogi_fill(lport, fp); |
366 | break; |
367 | |
368 | case ELS_FDISC: |
369 | fc_fdisc_fill(lport, fp); |
370 | break; |
371 | |
372 | case ELS_LOGO: |
373 | fc_logo_fill(lport, fp); |
374 | break; |
375 | |
376 | case ELS_RTV: |
377 | fc_rtv_fill(lport, fp); |
378 | break; |
379 | |
380 | case ELS_REC: |
381 | fc_rec_fill(lport, fp); |
382 | break; |
383 | |
384 | case ELS_PRLI: |
385 | fc_prli_fill(lport, fp); |
386 | break; |
387 | |
388 | case ELS_SCR: |
389 | fc_scr_fill(lport, fp); |
390 | break; |
391 | |
392 | default: |
393 | return -EINVAL; |
394 | } |
395 | |
396 | *r_ctl = FC_RCTL_ELS_REQ; |
397 | *fh_type = FC_TYPE_ELS; |
398 | return 0; |
399 | } |
400 | #endif /* _FC_ENCODE_H_ */ |
401 |
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