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42e9a92f RL |
1 | /* |
2 | * Copyright(c) 2007 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 | /* | |
21 | * PORT LOCKING NOTES | |
22 | * | |
23 | * These comments only apply to the 'port code' which consists of the lport, | |
24 | * disc and rport blocks. | |
25 | * | |
26 | * MOTIVATION | |
27 | * | |
28 | * The lport, disc and rport blocks all have mutexes that are used to protect | |
29 | * those objects. The main motivation for these locks is to prevent from | |
30 | * having an lport reset just before we send a frame. In that scenario the | |
31 | * lport's FID would get set to zero and then we'd send a frame with an | |
32 | * invalid SID. We also need to ensure that states don't change unexpectedly | |
33 | * while processing another state. | |
34 | * | |
35 | * HEIRARCHY | |
36 | * | |
37 | * The following heirarchy defines the locking rules. A greater lock | |
38 | * may be held before acquiring a lesser lock, but a lesser lock should never | |
39 | * be held while attempting to acquire a greater lock. Here is the heirarchy- | |
40 | * | |
41 | * lport > disc, lport > rport, disc > rport | |
42 | * | |
43 | * CALLBACKS | |
44 | * | |
45 | * The callbacks cause complications with this scheme. There is a callback | |
46 | * from the rport (to either lport or disc) and a callback from disc | |
47 | * (to the lport). | |
48 | * | |
49 | * As rports exit the rport state machine a callback is made to the owner of | |
50 | * the rport to notify success or failure. Since the callback is likely to | |
51 | * cause the lport or disc to grab its lock we cannot hold the rport lock | |
52 | * while making the callback. To ensure that the rport is not free'd while | |
53 | * processing the callback the rport callbacks are serialized through a | |
54 | * single-threaded workqueue. An rport would never be free'd while in a | |
55 | * callback handler becuase no other rport work in this queue can be executed | |
56 | * at the same time. | |
57 | * | |
58 | * When discovery succeeds or fails a callback is made to the lport as | |
59 | * notification. Currently, succesful discovery causes the lport to take no | |
60 | * action. A failure will cause the lport to reset. There is likely a circular | |
61 | * locking problem with this implementation. | |
62 | */ | |
63 | ||
64 | /* | |
65 | * LPORT LOCKING | |
66 | * | |
67 | * The critical sections protected by the lport's mutex are quite broad and | |
68 | * may be improved upon in the future. The lport code and its locking doesn't | |
69 | * influence the I/O path, so excessive locking doesn't penalize I/O | |
70 | * performance. | |
71 | * | |
72 | * The strategy is to lock whenever processing a request or response. Note | |
73 | * that every _enter_* function corresponds to a state change. They generally | |
74 | * change the lports state and then send a request out on the wire. We lock | |
75 | * before calling any of these functions to protect that state change. This | |
76 | * means that the entry points into the lport block manage the locks while | |
77 | * the state machine can transition between states (i.e. _enter_* functions) | |
78 | * while always staying protected. | |
79 | * | |
80 | * When handling responses we also hold the lport mutex broadly. When the | |
81 | * lport receives the response frame it locks the mutex and then calls the | |
82 | * appropriate handler for the particuar response. Generally a response will | |
83 | * trigger a state change and so the lock must already be held. | |
84 | * | |
85 | * Retries also have to consider the locking. The retries occur from a work | |
86 | * context and the work function will lock the lport and then retry the state | |
87 | * (i.e. _enter_* function). | |
88 | */ | |
89 | ||
90 | #include <linux/timer.h> | |
91 | #include <asm/unaligned.h> | |
92 | ||
93 | #include <scsi/fc/fc_gs.h> | |
94 | ||
95 | #include <scsi/libfc.h> | |
96 | #include <scsi/fc_encode.h> | |
97 | ||
98 | /* Fabric IDs to use for point-to-point mode, chosen on whims. */ | |
99 | #define FC_LOCAL_PTP_FID_LO 0x010101 | |
100 | #define FC_LOCAL_PTP_FID_HI 0x010102 | |
101 | ||
102 | #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ | |
103 | ||
42e9a92f RL |
104 | static void fc_lport_error(struct fc_lport *, struct fc_frame *); |
105 | ||
106 | static void fc_lport_enter_reset(struct fc_lport *); | |
107 | static void fc_lport_enter_flogi(struct fc_lport *); | |
108 | static void fc_lport_enter_dns(struct fc_lport *); | |
109 | static void fc_lport_enter_rpn_id(struct fc_lport *); | |
110 | static void fc_lport_enter_rft_id(struct fc_lport *); | |
111 | static void fc_lport_enter_scr(struct fc_lport *); | |
112 | static void fc_lport_enter_ready(struct fc_lport *); | |
113 | static void fc_lport_enter_logo(struct fc_lport *); | |
114 | ||
115 | static const char *fc_lport_state_names[] = { | |
b1d9fd55 | 116 | [LPORT_ST_DISABLED] = "disabled", |
42e9a92f RL |
117 | [LPORT_ST_FLOGI] = "FLOGI", |
118 | [LPORT_ST_DNS] = "dNS", | |
119 | [LPORT_ST_RPN_ID] = "RPN_ID", | |
120 | [LPORT_ST_RFT_ID] = "RFT_ID", | |
121 | [LPORT_ST_SCR] = "SCR", | |
122 | [LPORT_ST_READY] = "Ready", | |
123 | [LPORT_ST_LOGO] = "LOGO", | |
124 | [LPORT_ST_RESET] = "reset", | |
125 | }; | |
126 | ||
127 | static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) | |
128 | { | |
129 | fc_frame_free(fp); | |
130 | return 0; | |
131 | } | |
132 | ||
133 | /** | |
34f42a07 | 134 | * fc_lport_rport_callback() - Event handler for rport events |
42e9a92f | 135 | * @lport: The lport which is receiving the event |
9fb9d328 | 136 | * @rdata: private remote port data |
42e9a92f RL |
137 | * @event: The event that occured |
138 | * | |
139 | * Locking Note: The rport lock should not be held when calling | |
140 | * this function. | |
141 | */ | |
142 | static void fc_lport_rport_callback(struct fc_lport *lport, | |
9fb9d328 | 143 | struct fc_rport_priv *rdata, |
42e9a92f RL |
144 | enum fc_rport_event event) |
145 | { | |
7414705e | 146 | FC_LPORT_DBG(lport, "Received a %d event for port (%6x)\n", event, |
f211fa51 | 147 | rdata->ids.port_id); |
42e9a92f RL |
148 | |
149 | switch (event) { | |
150 | case RPORT_EV_CREATED: | |
f211fa51 | 151 | if (rdata->ids.port_id == FC_FID_DIR_SERV) { |
42e9a92f RL |
152 | mutex_lock(&lport->lp_mutex); |
153 | if (lport->state == LPORT_ST_DNS) { | |
9fb9d328 | 154 | lport->dns_rp = rdata; |
42e9a92f RL |
155 | fc_lport_enter_rpn_id(lport); |
156 | } else { | |
7414705e RL |
157 | FC_LPORT_DBG(lport, "Received an CREATED event " |
158 | "on port (%6x) for the directory " | |
159 | "server, but the lport is not " | |
160 | "in the DNS state, it's in the " | |
f211fa51 | 161 | "%d state", rdata->ids.port_id, |
7414705e | 162 | lport->state); |
9fb9d328 | 163 | lport->tt.rport_logoff(rdata); |
42e9a92f RL |
164 | } |
165 | mutex_unlock(&lport->lp_mutex); | |
166 | } else | |
7414705e RL |
167 | FC_LPORT_DBG(lport, "Received an event for port (%6x) " |
168 | "which is not the directory server\n", | |
f211fa51 | 169 | rdata->ids.port_id); |
42e9a92f RL |
170 | break; |
171 | case RPORT_EV_LOGO: | |
172 | case RPORT_EV_FAILED: | |
173 | case RPORT_EV_STOP: | |
f211fa51 | 174 | if (rdata->ids.port_id == FC_FID_DIR_SERV) { |
42e9a92f RL |
175 | mutex_lock(&lport->lp_mutex); |
176 | lport->dns_rp = NULL; | |
177 | mutex_unlock(&lport->lp_mutex); | |
178 | ||
179 | } else | |
7414705e RL |
180 | FC_LPORT_DBG(lport, "Received an event for port (%6x) " |
181 | "which is not the directory server\n", | |
f211fa51 | 182 | rdata->ids.port_id); |
42e9a92f RL |
183 | break; |
184 | case RPORT_EV_NONE: | |
185 | break; | |
186 | } | |
187 | } | |
188 | ||
189 | /** | |
34f42a07 | 190 | * fc_lport_state() - Return a string which represents the lport's state |
42e9a92f RL |
191 | * @lport: The lport whose state is to converted to a string |
192 | */ | |
193 | static const char *fc_lport_state(struct fc_lport *lport) | |
194 | { | |
195 | const char *cp; | |
196 | ||
197 | cp = fc_lport_state_names[lport->state]; | |
198 | if (!cp) | |
199 | cp = "unknown"; | |
200 | return cp; | |
201 | } | |
202 | ||
203 | /** | |
34f42a07 | 204 | * fc_lport_ptp_setup() - Create an rport for point-to-point mode |
42e9a92f RL |
205 | * @lport: The lport to attach the ptp rport to |
206 | * @fid: The FID of the ptp rport | |
207 | * @remote_wwpn: The WWPN of the ptp rport | |
208 | * @remote_wwnn: The WWNN of the ptp rport | |
209 | */ | |
210 | static void fc_lport_ptp_setup(struct fc_lport *lport, | |
211 | u32 remote_fid, u64 remote_wwpn, | |
212 | u64 remote_wwnn) | |
213 | { | |
795d86f5 | 214 | struct fc_rport_identifiers ids; |
42e9a92f | 215 | |
795d86f5 JE |
216 | ids.port_id = remote_fid; |
217 | ids.port_name = remote_wwpn; | |
218 | ids.node_name = remote_wwnn; | |
219 | ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
42e9a92f RL |
220 | |
221 | if (lport->ptp_rp) { | |
222 | lport->tt.rport_logoff(lport->ptp_rp); | |
223 | lport->ptp_rp = NULL; | |
224 | } | |
225 | ||
795d86f5 | 226 | lport->ptp_rp = lport->tt.rport_create(lport, &ids); |
42e9a92f RL |
227 | |
228 | lport->tt.rport_login(lport->ptp_rp); | |
229 | ||
230 | fc_lport_enter_ready(lport); | |
231 | } | |
232 | ||
233 | void fc_get_host_port_type(struct Scsi_Host *shost) | |
234 | { | |
235 | /* TODO - currently just NPORT */ | |
236 | fc_host_port_type(shost) = FC_PORTTYPE_NPORT; | |
237 | } | |
238 | EXPORT_SYMBOL(fc_get_host_port_type); | |
239 | ||
240 | void fc_get_host_port_state(struct Scsi_Host *shost) | |
241 | { | |
242 | struct fc_lport *lp = shost_priv(shost); | |
243 | ||
bc0e17f6 | 244 | if (lp->link_up) |
42e9a92f RL |
245 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; |
246 | else | |
247 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
248 | } | |
249 | EXPORT_SYMBOL(fc_get_host_port_state); | |
250 | ||
251 | void fc_get_host_speed(struct Scsi_Host *shost) | |
252 | { | |
253 | struct fc_lport *lport = shost_priv(shost); | |
254 | ||
255 | fc_host_speed(shost) = lport->link_speed; | |
256 | } | |
257 | EXPORT_SYMBOL(fc_get_host_speed); | |
258 | ||
259 | struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) | |
260 | { | |
42e9a92f RL |
261 | struct fc_host_statistics *fcoe_stats; |
262 | struct fc_lport *lp = shost_priv(shost); | |
263 | struct timespec v0, v1; | |
582b45bc | 264 | unsigned int cpu; |
42e9a92f RL |
265 | |
266 | fcoe_stats = &lp->host_stats; | |
267 | memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); | |
268 | ||
269 | jiffies_to_timespec(jiffies, &v0); | |
270 | jiffies_to_timespec(lp->boot_time, &v1); | |
271 | fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); | |
272 | ||
582b45bc RL |
273 | for_each_possible_cpu(cpu) { |
274 | struct fcoe_dev_stats *stats; | |
275 | ||
276 | stats = per_cpu_ptr(lp->dev_stats, cpu); | |
277 | ||
42e9a92f RL |
278 | fcoe_stats->tx_frames += stats->TxFrames; |
279 | fcoe_stats->tx_words += stats->TxWords; | |
280 | fcoe_stats->rx_frames += stats->RxFrames; | |
281 | fcoe_stats->rx_words += stats->RxWords; | |
282 | fcoe_stats->error_frames += stats->ErrorFrames; | |
283 | fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; | |
284 | fcoe_stats->fcp_input_requests += stats->InputRequests; | |
285 | fcoe_stats->fcp_output_requests += stats->OutputRequests; | |
286 | fcoe_stats->fcp_control_requests += stats->ControlRequests; | |
287 | fcoe_stats->fcp_input_megabytes += stats->InputMegabytes; | |
288 | fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes; | |
289 | fcoe_stats->link_failure_count += stats->LinkFailureCount; | |
290 | } | |
291 | fcoe_stats->lip_count = -1; | |
292 | fcoe_stats->nos_count = -1; | |
293 | fcoe_stats->loss_of_sync_count = -1; | |
294 | fcoe_stats->loss_of_signal_count = -1; | |
295 | fcoe_stats->prim_seq_protocol_err_count = -1; | |
296 | fcoe_stats->dumped_frames = -1; | |
297 | return fcoe_stats; | |
298 | } | |
299 | EXPORT_SYMBOL(fc_get_host_stats); | |
300 | ||
301 | /* | |
302 | * Fill in FLOGI command for request. | |
303 | */ | |
304 | static void | |
305 | fc_lport_flogi_fill(struct fc_lport *lport, struct fc_els_flogi *flogi, | |
306 | unsigned int op) | |
307 | { | |
308 | struct fc_els_csp *sp; | |
309 | struct fc_els_cssp *cp; | |
310 | ||
311 | memset(flogi, 0, sizeof(*flogi)); | |
312 | flogi->fl_cmd = (u8) op; | |
313 | put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); | |
314 | put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); | |
315 | sp = &flogi->fl_csp; | |
316 | sp->sp_hi_ver = 0x20; | |
317 | sp->sp_lo_ver = 0x20; | |
318 | sp->sp_bb_cred = htons(10); /* this gets set by gateway */ | |
319 | sp->sp_bb_data = htons((u16) lport->mfs); | |
320 | cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ | |
321 | cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); | |
322 | if (op != ELS_FLOGI) { | |
323 | sp->sp_features = htons(FC_SP_FT_CIRO); | |
324 | sp->sp_tot_seq = htons(255); /* seq. we accept */ | |
325 | sp->sp_rel_off = htons(0x1f); | |
326 | sp->sp_e_d_tov = htonl(lport->e_d_tov); | |
327 | ||
328 | cp->cp_rdfs = htons((u16) lport->mfs); | |
329 | cp->cp_con_seq = htons(255); | |
330 | cp->cp_open_seq = 1; | |
331 | } | |
332 | } | |
333 | ||
334 | /* | |
335 | * Add a supported FC-4 type. | |
336 | */ | |
337 | static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) | |
338 | { | |
339 | __be32 *mp; | |
340 | ||
341 | mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; | |
342 | *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); | |
343 | } | |
344 | ||
345 | /** | |
34f42a07 | 346 | * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. |
42e9a92f RL |
347 | * @lport: Fibre Channel local port recieving the RLIR |
348 | * @sp: current sequence in the RLIR exchange | |
349 | * @fp: RLIR request frame | |
350 | * | |
351 | * Locking Note: The lport lock is exected to be held before calling | |
352 | * this function. | |
353 | */ | |
354 | static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp, | |
355 | struct fc_lport *lport) | |
356 | { | |
7414705e RL |
357 | FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", |
358 | fc_lport_state(lport)); | |
42e9a92f RL |
359 | |
360 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); | |
361 | fc_frame_free(fp); | |
362 | } | |
363 | ||
364 | /** | |
34f42a07 | 365 | * fc_lport_recv_echo_req() - Handle received ECHO request |
42e9a92f RL |
366 | * @lport: Fibre Channel local port recieving the ECHO |
367 | * @sp: current sequence in the ECHO exchange | |
368 | * @fp: ECHO request frame | |
369 | * | |
370 | * Locking Note: The lport lock is exected to be held before calling | |
371 | * this function. | |
372 | */ | |
373 | static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp, | |
374 | struct fc_lport *lport) | |
375 | { | |
376 | struct fc_frame *fp; | |
377 | struct fc_exch *ep = fc_seq_exch(sp); | |
378 | unsigned int len; | |
379 | void *pp; | |
380 | void *dp; | |
381 | u32 f_ctl; | |
382 | ||
7414705e RL |
383 | FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", |
384 | fc_lport_state(lport)); | |
42e9a92f RL |
385 | |
386 | len = fr_len(in_fp) - sizeof(struct fc_frame_header); | |
387 | pp = fc_frame_payload_get(in_fp, len); | |
388 | ||
389 | if (len < sizeof(__be32)) | |
390 | len = sizeof(__be32); | |
391 | ||
392 | fp = fc_frame_alloc(lport, len); | |
393 | if (fp) { | |
394 | dp = fc_frame_payload_get(fp, len); | |
395 | memcpy(dp, pp, len); | |
396 | *((u32 *)dp) = htonl(ELS_LS_ACC << 24); | |
397 | sp = lport->tt.seq_start_next(sp); | |
398 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; | |
399 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
400 | FC_TYPE_ELS, f_ctl, 0); | |
401 | lport->tt.seq_send(lport, sp, fp); | |
402 | } | |
403 | fc_frame_free(in_fp); | |
404 | } | |
405 | ||
406 | /** | |
34f42a07 | 407 | * fc_lport_recv_echo_req() - Handle received Request Node ID data request |
42e9a92f RL |
408 | * @lport: Fibre Channel local port recieving the RNID |
409 | * @sp: current sequence in the RNID exchange | |
410 | * @fp: RNID request frame | |
411 | * | |
412 | * Locking Note: The lport lock is exected to be held before calling | |
413 | * this function. | |
414 | */ | |
415 | static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp, | |
416 | struct fc_lport *lport) | |
417 | { | |
418 | struct fc_frame *fp; | |
419 | struct fc_exch *ep = fc_seq_exch(sp); | |
420 | struct fc_els_rnid *req; | |
421 | struct { | |
422 | struct fc_els_rnid_resp rnid; | |
423 | struct fc_els_rnid_cid cid; | |
424 | struct fc_els_rnid_gen gen; | |
425 | } *rp; | |
426 | struct fc_seq_els_data rjt_data; | |
427 | u8 fmt; | |
428 | size_t len; | |
429 | u32 f_ctl; | |
430 | ||
7414705e RL |
431 | FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", |
432 | fc_lport_state(lport)); | |
42e9a92f RL |
433 | |
434 | req = fc_frame_payload_get(in_fp, sizeof(*req)); | |
435 | if (!req) { | |
436 | rjt_data.fp = NULL; | |
437 | rjt_data.reason = ELS_RJT_LOGIC; | |
438 | rjt_data.explan = ELS_EXPL_NONE; | |
439 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
440 | } else { | |
441 | fmt = req->rnid_fmt; | |
442 | len = sizeof(*rp); | |
443 | if (fmt != ELS_RNIDF_GEN || | |
444 | ntohl(lport->rnid_gen.rnid_atype) == 0) { | |
445 | fmt = ELS_RNIDF_NONE; /* nothing to provide */ | |
446 | len -= sizeof(rp->gen); | |
447 | } | |
448 | fp = fc_frame_alloc(lport, len); | |
449 | if (fp) { | |
450 | rp = fc_frame_payload_get(fp, len); | |
451 | memset(rp, 0, len); | |
452 | rp->rnid.rnid_cmd = ELS_LS_ACC; | |
453 | rp->rnid.rnid_fmt = fmt; | |
454 | rp->rnid.rnid_cid_len = sizeof(rp->cid); | |
455 | rp->cid.rnid_wwpn = htonll(lport->wwpn); | |
456 | rp->cid.rnid_wwnn = htonll(lport->wwnn); | |
457 | if (fmt == ELS_RNIDF_GEN) { | |
458 | rp->rnid.rnid_sid_len = sizeof(rp->gen); | |
459 | memcpy(&rp->gen, &lport->rnid_gen, | |
460 | sizeof(rp->gen)); | |
461 | } | |
462 | sp = lport->tt.seq_start_next(sp); | |
463 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; | |
464 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
465 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
466 | FC_TYPE_ELS, f_ctl, 0); | |
467 | lport->tt.seq_send(lport, sp, fp); | |
468 | } | |
469 | } | |
470 | fc_frame_free(in_fp); | |
471 | } | |
472 | ||
473 | /** | |
34f42a07 | 474 | * fc_lport_recv_adisc_req() - Handle received Address Discovery Request |
42e9a92f RL |
475 | * @lport: Fibre Channel local port recieving the ADISC |
476 | * @sp: current sequence in the ADISC exchange | |
477 | * @fp: ADISC request frame | |
478 | * | |
479 | * Locking Note: The lport lock is expected to be held before calling | |
480 | * this function. | |
481 | */ | |
482 | static void fc_lport_recv_adisc_req(struct fc_seq *sp, struct fc_frame *in_fp, | |
483 | struct fc_lport *lport) | |
484 | { | |
485 | struct fc_frame *fp; | |
486 | struct fc_exch *ep = fc_seq_exch(sp); | |
487 | struct fc_els_adisc *req, *rp; | |
488 | struct fc_seq_els_data rjt_data; | |
489 | size_t len; | |
490 | u32 f_ctl; | |
491 | ||
7414705e RL |
492 | FC_LPORT_DBG(lport, "Received ADISC request while in state %s\n", |
493 | fc_lport_state(lport)); | |
42e9a92f RL |
494 | |
495 | req = fc_frame_payload_get(in_fp, sizeof(*req)); | |
496 | if (!req) { | |
497 | rjt_data.fp = NULL; | |
498 | rjt_data.reason = ELS_RJT_LOGIC; | |
499 | rjt_data.explan = ELS_EXPL_NONE; | |
500 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); | |
501 | } else { | |
502 | len = sizeof(*rp); | |
503 | fp = fc_frame_alloc(lport, len); | |
504 | if (fp) { | |
505 | rp = fc_frame_payload_get(fp, len); | |
506 | memset(rp, 0, len); | |
507 | rp->adisc_cmd = ELS_LS_ACC; | |
508 | rp->adisc_wwpn = htonll(lport->wwpn); | |
509 | rp->adisc_wwnn = htonll(lport->wwnn); | |
510 | hton24(rp->adisc_port_id, | |
511 | fc_host_port_id(lport->host)); | |
512 | sp = lport->tt.seq_start_next(sp); | |
513 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; | |
514 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; | |
515 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
516 | FC_TYPE_ELS, f_ctl, 0); | |
517 | lport->tt.seq_send(lport, sp, fp); | |
518 | } | |
519 | } | |
520 | fc_frame_free(in_fp); | |
521 | } | |
522 | ||
523 | /** | |
34f42a07 | 524 | * fc_lport_recv_logo_req() - Handle received fabric LOGO request |
42e9a92f RL |
525 | * @lport: Fibre Channel local port recieving the LOGO |
526 | * @sp: current sequence in the LOGO exchange | |
527 | * @fp: LOGO request frame | |
528 | * | |
529 | * Locking Note: The lport lock is exected to be held before calling | |
530 | * this function. | |
531 | */ | |
532 | static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp, | |
533 | struct fc_lport *lport) | |
534 | { | |
535 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); | |
536 | fc_lport_enter_reset(lport); | |
537 | fc_frame_free(fp); | |
538 | } | |
539 | ||
540 | /** | |
34f42a07 | 541 | * fc_fabric_login() - Start the lport state machine |
42e9a92f RL |
542 | * @lport: The lport that should log into the fabric |
543 | * | |
544 | * Locking Note: This function should not be called | |
545 | * with the lport lock held. | |
546 | */ | |
547 | int fc_fabric_login(struct fc_lport *lport) | |
548 | { | |
549 | int rc = -1; | |
550 | ||
551 | mutex_lock(&lport->lp_mutex); | |
b1d9fd55 | 552 | if (lport->state == LPORT_ST_DISABLED) { |
42e9a92f RL |
553 | fc_lport_enter_reset(lport); |
554 | rc = 0; | |
555 | } | |
556 | mutex_unlock(&lport->lp_mutex); | |
557 | ||
558 | return rc; | |
559 | } | |
560 | EXPORT_SYMBOL(fc_fabric_login); | |
561 | ||
562 | /** | |
34f42a07 | 563 | * fc_linkup() - Handler for transport linkup events |
42e9a92f RL |
564 | * @lport: The lport whose link is up |
565 | */ | |
566 | void fc_linkup(struct fc_lport *lport) | |
567 | { | |
7414705e RL |
568 | printk(KERN_INFO "libfc: Link up on port (%6x)\n", |
569 | fc_host_port_id(lport->host)); | |
42e9a92f RL |
570 | |
571 | mutex_lock(&lport->lp_mutex); | |
bc0e17f6 VD |
572 | if (!lport->link_up) { |
573 | lport->link_up = 1; | |
42e9a92f RL |
574 | |
575 | if (lport->state == LPORT_ST_RESET) | |
576 | fc_lport_enter_flogi(lport); | |
577 | } | |
578 | mutex_unlock(&lport->lp_mutex); | |
579 | } | |
580 | EXPORT_SYMBOL(fc_linkup); | |
581 | ||
582 | /** | |
34f42a07 | 583 | * fc_linkdown() - Handler for transport linkdown events |
42e9a92f RL |
584 | * @lport: The lport whose link is down |
585 | */ | |
586 | void fc_linkdown(struct fc_lport *lport) | |
587 | { | |
588 | mutex_lock(&lport->lp_mutex); | |
7414705e RL |
589 | printk(KERN_INFO "libfc: Link down on port (%6x)\n", |
590 | fc_host_port_id(lport->host)); | |
42e9a92f | 591 | |
bc0e17f6 VD |
592 | if (lport->link_up) { |
593 | lport->link_up = 0; | |
42e9a92f RL |
594 | fc_lport_enter_reset(lport); |
595 | lport->tt.fcp_cleanup(lport); | |
596 | } | |
597 | mutex_unlock(&lport->lp_mutex); | |
598 | } | |
599 | EXPORT_SYMBOL(fc_linkdown); | |
600 | ||
42e9a92f | 601 | /** |
34f42a07 | 602 | * fc_fabric_logoff() - Logout of the fabric |
42e9a92f RL |
603 | * @lport: fc_lport pointer to logoff the fabric |
604 | * | |
605 | * Return value: | |
606 | * 0 for success, -1 for failure | |
34f42a07 | 607 | */ |
42e9a92f RL |
608 | int fc_fabric_logoff(struct fc_lport *lport) |
609 | { | |
610 | lport->tt.disc_stop_final(lport); | |
611 | mutex_lock(&lport->lp_mutex); | |
a0fd2e49 AJ |
612 | if (lport->dns_rp) |
613 | lport->tt.rport_logoff(lport->dns_rp); | |
614 | mutex_unlock(&lport->lp_mutex); | |
615 | lport->tt.rport_flush_queue(); | |
616 | mutex_lock(&lport->lp_mutex); | |
42e9a92f RL |
617 | fc_lport_enter_logo(lport); |
618 | mutex_unlock(&lport->lp_mutex); | |
f7db2c15 | 619 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
620 | return 0; |
621 | } | |
622 | EXPORT_SYMBOL(fc_fabric_logoff); | |
623 | ||
624 | /** | |
34f42a07 | 625 | * fc_lport_destroy() - unregister a fc_lport |
42e9a92f RL |
626 | * @lport: fc_lport pointer to unregister |
627 | * | |
628 | * Return value: | |
629 | * None | |
630 | * Note: | |
631 | * exit routine for fc_lport instance | |
632 | * clean-up all the allocated memory | |
633 | * and free up other system resources. | |
634 | * | |
34f42a07 | 635 | */ |
42e9a92f RL |
636 | int fc_lport_destroy(struct fc_lport *lport) |
637 | { | |
bbf15669 | 638 | mutex_lock(&lport->lp_mutex); |
b1d9fd55 | 639 | lport->state = LPORT_ST_DISABLED; |
bbf15669 | 640 | lport->link_up = 0; |
42e9a92f | 641 | lport->tt.frame_send = fc_frame_drop; |
bbf15669 AJ |
642 | mutex_unlock(&lport->lp_mutex); |
643 | ||
42e9a92f | 644 | lport->tt.fcp_abort_io(lport); |
e9ba8b42 | 645 | lport->tt.disc_stop_final(lport); |
1f6ff364 | 646 | lport->tt.exch_mgr_reset(lport, 0, 0); |
42e9a92f RL |
647 | return 0; |
648 | } | |
649 | EXPORT_SYMBOL(fc_lport_destroy); | |
650 | ||
651 | /** | |
34f42a07 | 652 | * fc_set_mfs() - sets up the mfs for the corresponding fc_lport |
42e9a92f RL |
653 | * @lport: fc_lport pointer to unregister |
654 | * @mfs: the new mfs for fc_lport | |
655 | * | |
656 | * Set mfs for the given fc_lport to the new mfs. | |
657 | * | |
658 | * Return: 0 for success | |
34f42a07 | 659 | */ |
42e9a92f RL |
660 | int fc_set_mfs(struct fc_lport *lport, u32 mfs) |
661 | { | |
662 | unsigned int old_mfs; | |
663 | int rc = -EINVAL; | |
664 | ||
665 | mutex_lock(&lport->lp_mutex); | |
666 | ||
667 | old_mfs = lport->mfs; | |
668 | ||
669 | if (mfs >= FC_MIN_MAX_FRAME) { | |
670 | mfs &= ~3; | |
671 | if (mfs > FC_MAX_FRAME) | |
672 | mfs = FC_MAX_FRAME; | |
673 | mfs -= sizeof(struct fc_frame_header); | |
674 | lport->mfs = mfs; | |
675 | rc = 0; | |
676 | } | |
677 | ||
678 | if (!rc && mfs < old_mfs) | |
679 | fc_lport_enter_reset(lport); | |
680 | ||
681 | mutex_unlock(&lport->lp_mutex); | |
682 | ||
683 | return rc; | |
684 | } | |
685 | EXPORT_SYMBOL(fc_set_mfs); | |
686 | ||
687 | /** | |
34f42a07 | 688 | * fc_lport_disc_callback() - Callback for discovery events |
42e9a92f RL |
689 | * @lport: FC local port |
690 | * @event: The discovery event | |
691 | */ | |
692 | void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) | |
693 | { | |
694 | switch (event) { | |
695 | case DISC_EV_SUCCESS: | |
7414705e | 696 | FC_LPORT_DBG(lport, "Discovery succeeded\n"); |
42e9a92f RL |
697 | break; |
698 | case DISC_EV_FAILED: | |
7414705e RL |
699 | printk(KERN_ERR "libfc: Discovery failed for port (%6x)\n", |
700 | fc_host_port_id(lport->host)); | |
42e9a92f RL |
701 | mutex_lock(&lport->lp_mutex); |
702 | fc_lport_enter_reset(lport); | |
703 | mutex_unlock(&lport->lp_mutex); | |
704 | break; | |
705 | case DISC_EV_NONE: | |
706 | WARN_ON(1); | |
707 | break; | |
708 | } | |
709 | } | |
710 | ||
711 | /** | |
34f42a07 | 712 | * fc_rport_enter_ready() - Enter the ready state and start discovery |
42e9a92f RL |
713 | * @lport: Fibre Channel local port that is ready |
714 | * | |
715 | * Locking Note: The lport lock is expected to be held before calling | |
716 | * this routine. | |
717 | */ | |
718 | static void fc_lport_enter_ready(struct fc_lport *lport) | |
719 | { | |
7414705e RL |
720 | FC_LPORT_DBG(lport, "Entered READY from state %s\n", |
721 | fc_lport_state(lport)); | |
42e9a92f RL |
722 | |
723 | fc_lport_state_enter(lport, LPORT_ST_READY); | |
724 | ||
725 | lport->tt.disc_start(fc_lport_disc_callback, lport); | |
726 | } | |
727 | ||
728 | /** | |
34f42a07 | 729 | * fc_lport_recv_flogi_req() - Receive a FLOGI request |
42e9a92f RL |
730 | * @sp_in: The sequence the FLOGI is on |
731 | * @rx_fp: The frame the FLOGI is in | |
732 | * @lport: The lport that recieved the request | |
733 | * | |
734 | * A received FLOGI request indicates a point-to-point connection. | |
735 | * Accept it with the common service parameters indicating our N port. | |
736 | * Set up to do a PLOGI if we have the higher-number WWPN. | |
737 | * | |
738 | * Locking Note: The lport lock is exected to be held before calling | |
739 | * this function. | |
740 | */ | |
741 | static void fc_lport_recv_flogi_req(struct fc_seq *sp_in, | |
742 | struct fc_frame *rx_fp, | |
743 | struct fc_lport *lport) | |
744 | { | |
745 | struct fc_frame *fp; | |
746 | struct fc_frame_header *fh; | |
747 | struct fc_seq *sp; | |
748 | struct fc_exch *ep; | |
749 | struct fc_els_flogi *flp; | |
750 | struct fc_els_flogi *new_flp; | |
751 | u64 remote_wwpn; | |
752 | u32 remote_fid; | |
753 | u32 local_fid; | |
754 | u32 f_ctl; | |
755 | ||
7414705e RL |
756 | FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", |
757 | fc_lport_state(lport)); | |
42e9a92f RL |
758 | |
759 | fh = fc_frame_header_get(rx_fp); | |
760 | remote_fid = ntoh24(fh->fh_s_id); | |
761 | flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); | |
762 | if (!flp) | |
763 | goto out; | |
764 | remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); | |
765 | if (remote_wwpn == lport->wwpn) { | |
7414705e RL |
766 | printk(KERN_WARNING "libfc: Received FLOGI from port " |
767 | "with same WWPN %llx\n", remote_wwpn); | |
42e9a92f RL |
768 | goto out; |
769 | } | |
7414705e | 770 | FC_LPORT_DBG(lport, "FLOGI from port WWPN %llx\n", remote_wwpn); |
42e9a92f RL |
771 | |
772 | /* | |
773 | * XXX what is the right thing to do for FIDs? | |
774 | * The originator might expect our S_ID to be 0xfffffe. | |
775 | * But if so, both of us could end up with the same FID. | |
776 | */ | |
777 | local_fid = FC_LOCAL_PTP_FID_LO; | |
778 | if (remote_wwpn < lport->wwpn) { | |
779 | local_fid = FC_LOCAL_PTP_FID_HI; | |
780 | if (!remote_fid || remote_fid == local_fid) | |
781 | remote_fid = FC_LOCAL_PTP_FID_LO; | |
782 | } else if (!remote_fid) { | |
783 | remote_fid = FC_LOCAL_PTP_FID_HI; | |
784 | } | |
785 | ||
786 | fc_host_port_id(lport->host) = local_fid; | |
787 | ||
788 | fp = fc_frame_alloc(lport, sizeof(*flp)); | |
789 | if (fp) { | |
790 | sp = lport->tt.seq_start_next(fr_seq(rx_fp)); | |
791 | new_flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
792 | fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); | |
793 | new_flp->fl_cmd = (u8) ELS_LS_ACC; | |
794 | ||
795 | /* | |
796 | * Send the response. If this fails, the originator should | |
797 | * repeat the sequence. | |
798 | */ | |
799 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; | |
800 | ep = fc_seq_exch(sp); | |
801 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, | |
802 | FC_TYPE_ELS, f_ctl, 0); | |
803 | lport->tt.seq_send(lport, sp, fp); | |
804 | ||
805 | } else { | |
806 | fc_lport_error(lport, fp); | |
807 | } | |
808 | fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, | |
809 | get_unaligned_be64(&flp->fl_wwnn)); | |
810 | ||
811 | lport->tt.disc_start(fc_lport_disc_callback, lport); | |
812 | ||
813 | out: | |
814 | sp = fr_seq(rx_fp); | |
815 | fc_frame_free(rx_fp); | |
816 | } | |
817 | ||
818 | /** | |
34f42a07 | 819 | * fc_lport_recv_req() - The generic lport request handler |
42e9a92f RL |
820 | * @lport: The lport that received the request |
821 | * @sp: The sequence the request is on | |
822 | * @fp: The frame the request is in | |
823 | * | |
824 | * This function will see if the lport handles the request or | |
825 | * if an rport should handle the request. | |
826 | * | |
827 | * Locking Note: This function should not be called with the lport | |
828 | * lock held becuase it will grab the lock. | |
829 | */ | |
830 | static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, | |
831 | struct fc_frame *fp) | |
832 | { | |
833 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
834 | void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *); | |
9fb9d328 | 835 | struct fc_rport_priv *rdata; |
42e9a92f RL |
836 | u32 s_id; |
837 | u32 d_id; | |
838 | struct fc_seq_els_data rjt_data; | |
839 | ||
840 | mutex_lock(&lport->lp_mutex); | |
841 | ||
842 | /* | |
843 | * Handle special ELS cases like FLOGI, LOGO, and | |
844 | * RSCN here. These don't require a session. | |
845 | * Even if we had a session, it might not be ready. | |
846 | */ | |
e9ba8b42 JE |
847 | if (!lport->link_up) |
848 | fc_frame_free(fp); | |
849 | else if (fh->fh_type == FC_TYPE_ELS && | |
850 | fh->fh_r_ctl == FC_RCTL_ELS_REQ) { | |
42e9a92f RL |
851 | /* |
852 | * Check opcode. | |
853 | */ | |
854 | recv = NULL; | |
855 | switch (fc_frame_payload_op(fp)) { | |
856 | case ELS_FLOGI: | |
857 | recv = fc_lport_recv_flogi_req; | |
858 | break; | |
859 | case ELS_LOGO: | |
860 | fh = fc_frame_header_get(fp); | |
861 | if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) | |
862 | recv = fc_lport_recv_logo_req; | |
863 | break; | |
864 | case ELS_RSCN: | |
865 | recv = lport->tt.disc_recv_req; | |
866 | break; | |
867 | case ELS_ECHO: | |
868 | recv = fc_lport_recv_echo_req; | |
869 | break; | |
870 | case ELS_RLIR: | |
871 | recv = fc_lport_recv_rlir_req; | |
872 | break; | |
873 | case ELS_RNID: | |
874 | recv = fc_lport_recv_rnid_req; | |
875 | break; | |
876 | case ELS_ADISC: | |
877 | recv = fc_lport_recv_adisc_req; | |
878 | break; | |
879 | } | |
880 | ||
881 | if (recv) | |
882 | recv(sp, fp, lport); | |
883 | else { | |
884 | /* | |
885 | * Find session. | |
886 | * If this is a new incoming PLOGI, we won't find it. | |
887 | */ | |
888 | s_id = ntoh24(fh->fh_s_id); | |
889 | d_id = ntoh24(fh->fh_d_id); | |
890 | ||
9fb9d328 JE |
891 | rdata = lport->tt.rport_lookup(lport, s_id); |
892 | if (rdata) | |
893 | lport->tt.rport_recv_req(sp, fp, rdata); | |
42e9a92f RL |
894 | else { |
895 | rjt_data.fp = NULL; | |
896 | rjt_data.reason = ELS_RJT_UNAB; | |
897 | rjt_data.explan = ELS_EXPL_NONE; | |
898 | lport->tt.seq_els_rsp_send(sp, | |
899 | ELS_LS_RJT, | |
900 | &rjt_data); | |
901 | fc_frame_free(fp); | |
902 | } | |
903 | } | |
904 | } else { | |
7414705e RL |
905 | FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n", |
906 | fr_eof(fp)); | |
42e9a92f RL |
907 | fc_frame_free(fp); |
908 | } | |
909 | mutex_unlock(&lport->lp_mutex); | |
910 | ||
911 | /* | |
912 | * The common exch_done for all request may not be good | |
913 | * if any request requires longer hold on exhange. XXX | |
914 | */ | |
915 | lport->tt.exch_done(sp); | |
916 | } | |
917 | ||
918 | /** | |
34f42a07 | 919 | * fc_lport_reset() - Reset an lport |
42e9a92f RL |
920 | * @lport: The lport which should be reset |
921 | * | |
922 | * Locking Note: This functions should not be called with the | |
923 | * lport lock held. | |
924 | */ | |
925 | int fc_lport_reset(struct fc_lport *lport) | |
926 | { | |
f7db2c15 | 927 | cancel_delayed_work_sync(&lport->retry_work); |
42e9a92f RL |
928 | mutex_lock(&lport->lp_mutex); |
929 | fc_lport_enter_reset(lport); | |
930 | mutex_unlock(&lport->lp_mutex); | |
931 | return 0; | |
932 | } | |
933 | EXPORT_SYMBOL(fc_lport_reset); | |
934 | ||
935 | /** | |
1190d925 | 936 | * fc_lport_reset_locked() - Reset the local port |
42e9a92f RL |
937 | * @lport: Fibre Channel local port to be reset |
938 | * | |
939 | * Locking Note: The lport lock is expected to be held before calling | |
940 | * this routine. | |
941 | */ | |
1190d925 | 942 | static void fc_lport_reset_locked(struct fc_lport *lport) |
42e9a92f | 943 | { |
42e9a92f RL |
944 | if (lport->dns_rp) |
945 | lport->tt.rport_logoff(lport->dns_rp); | |
946 | ||
947 | if (lport->ptp_rp) { | |
948 | lport->tt.rport_logoff(lport->ptp_rp); | |
949 | lport->ptp_rp = NULL; | |
950 | } | |
951 | ||
952 | lport->tt.disc_stop(lport); | |
953 | ||
1f6ff364 | 954 | lport->tt.exch_mgr_reset(lport, 0, 0); |
42e9a92f RL |
955 | fc_host_fabric_name(lport->host) = 0; |
956 | fc_host_port_id(lport->host) = 0; | |
1190d925 | 957 | } |
42e9a92f | 958 | |
1190d925 JE |
959 | /** |
960 | * fc_lport_enter_reset() - Reset the local port | |
961 | * @lport: Fibre Channel local port to be reset | |
962 | * | |
963 | * Locking Note: The lport lock is expected to be held before calling | |
964 | * this routine. | |
965 | */ | |
966 | static void fc_lport_enter_reset(struct fc_lport *lport) | |
967 | { | |
968 | FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", | |
969 | fc_lport_state(lport)); | |
970 | ||
971 | fc_lport_state_enter(lport, LPORT_ST_RESET); | |
972 | fc_lport_reset_locked(lport); | |
bc0e17f6 | 973 | if (lport->link_up) |
42e9a92f RL |
974 | fc_lport_enter_flogi(lport); |
975 | } | |
976 | ||
1190d925 JE |
977 | /** |
978 | * fc_lport_enter_disabled() - disable the local port | |
979 | * @lport: Fibre Channel local port to be reset | |
980 | * | |
981 | * Locking Note: The lport lock is expected to be held before calling | |
982 | * this routine. | |
983 | */ | |
984 | static void fc_lport_enter_disabled(struct fc_lport *lport) | |
985 | { | |
986 | FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", | |
987 | fc_lport_state(lport)); | |
988 | ||
989 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); | |
990 | fc_lport_reset_locked(lport); | |
991 | } | |
992 | ||
42e9a92f | 993 | /** |
34f42a07 | 994 | * fc_lport_error() - Handler for any errors |
42e9a92f RL |
995 | * @lport: The fc_lport object |
996 | * @fp: The frame pointer | |
997 | * | |
998 | * If the error was caused by a resource allocation failure | |
999 | * then wait for half a second and retry, otherwise retry | |
1000 | * after the e_d_tov time. | |
1001 | */ | |
1002 | static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) | |
1003 | { | |
1004 | unsigned long delay = 0; | |
7414705e RL |
1005 | FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", |
1006 | PTR_ERR(fp), fc_lport_state(lport), | |
1007 | lport->retry_count); | |
42e9a92f RL |
1008 | |
1009 | if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { | |
1010 | /* | |
1011 | * Memory allocation failure, or the exchange timed out. | |
1012 | * Retry after delay | |
1013 | */ | |
1014 | if (lport->retry_count < lport->max_retry_count) { | |
1015 | lport->retry_count++; | |
1016 | if (!fp) | |
1017 | delay = msecs_to_jiffies(500); | |
1018 | else | |
1019 | delay = msecs_to_jiffies(lport->e_d_tov); | |
1020 | ||
1021 | schedule_delayed_work(&lport->retry_work, delay); | |
1022 | } else { | |
1023 | switch (lport->state) { | |
b1d9fd55 | 1024 | case LPORT_ST_DISABLED: |
42e9a92f RL |
1025 | case LPORT_ST_READY: |
1026 | case LPORT_ST_RESET: | |
1027 | case LPORT_ST_RPN_ID: | |
1028 | case LPORT_ST_RFT_ID: | |
1029 | case LPORT_ST_SCR: | |
1030 | case LPORT_ST_DNS: | |
1031 | case LPORT_ST_FLOGI: | |
1032 | case LPORT_ST_LOGO: | |
1033 | fc_lport_enter_reset(lport); | |
1034 | break; | |
1035 | } | |
1036 | } | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | /** | |
34f42a07 RL |
1041 | * fc_lport_rft_id_resp() - Handle response to Register Fibre |
1042 | * Channel Types by ID (RPN_ID) request | |
42e9a92f RL |
1043 | * @sp: current sequence in RPN_ID exchange |
1044 | * @fp: response frame | |
1045 | * @lp_arg: Fibre Channel host port instance | |
1046 | * | |
1047 | * Locking Note: This function will be called without the lport lock | |
1048 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1049 | * and then unlock the lport. | |
1050 | */ | |
1051 | static void fc_lport_rft_id_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1052 | void *lp_arg) | |
1053 | { | |
1054 | struct fc_lport *lport = lp_arg; | |
1055 | struct fc_frame_header *fh; | |
1056 | struct fc_ct_hdr *ct; | |
1057 | ||
1058 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
1059 | return; | |
1060 | ||
1061 | mutex_lock(&lport->lp_mutex); | |
1062 | ||
7414705e | 1063 | FC_LPORT_DBG(lport, "Received a RFT_ID response\n"); |
42e9a92f RL |
1064 | |
1065 | if (lport->state != LPORT_ST_RFT_ID) { | |
7414705e RL |
1066 | FC_LPORT_DBG(lport, "Received a RFT_ID response, but in state " |
1067 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1068 | if (IS_ERR(fp)) |
1069 | goto err; | |
42e9a92f RL |
1070 | goto out; |
1071 | } | |
1072 | ||
76f6804e AJ |
1073 | if (IS_ERR(fp)) { |
1074 | fc_lport_error(lport, fp); | |
1075 | goto err; | |
1076 | } | |
1077 | ||
42e9a92f RL |
1078 | fh = fc_frame_header_get(fp); |
1079 | ct = fc_frame_payload_get(fp, sizeof(*ct)); | |
1080 | ||
1081 | if (fh && ct && fh->fh_type == FC_TYPE_CT && | |
1082 | ct->ct_fs_type == FC_FST_DIR && | |
1083 | ct->ct_fs_subtype == FC_NS_SUBTYPE && | |
1084 | ntohs(ct->ct_cmd) == FC_FS_ACC) | |
1085 | fc_lport_enter_scr(lport); | |
1086 | else | |
1087 | fc_lport_error(lport, fp); | |
1088 | out: | |
1089 | fc_frame_free(fp); | |
1090 | err: | |
1091 | mutex_unlock(&lport->lp_mutex); | |
1092 | } | |
1093 | ||
1094 | /** | |
34f42a07 RL |
1095 | * fc_lport_rpn_id_resp() - Handle response to Register Port |
1096 | * Name by ID (RPN_ID) request | |
42e9a92f RL |
1097 | * @sp: current sequence in RPN_ID exchange |
1098 | * @fp: response frame | |
1099 | * @lp_arg: Fibre Channel host port instance | |
1100 | * | |
1101 | * Locking Note: This function will be called without the lport lock | |
1102 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1103 | * and then unlock the lport. | |
1104 | */ | |
1105 | static void fc_lport_rpn_id_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1106 | void *lp_arg) | |
1107 | { | |
1108 | struct fc_lport *lport = lp_arg; | |
1109 | struct fc_frame_header *fh; | |
1110 | struct fc_ct_hdr *ct; | |
1111 | ||
1112 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
1113 | return; | |
1114 | ||
1115 | mutex_lock(&lport->lp_mutex); | |
1116 | ||
7414705e | 1117 | FC_LPORT_DBG(lport, "Received a RPN_ID response\n"); |
42e9a92f RL |
1118 | |
1119 | if (lport->state != LPORT_ST_RPN_ID) { | |
7414705e RL |
1120 | FC_LPORT_DBG(lport, "Received a RPN_ID response, but in state " |
1121 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1122 | if (IS_ERR(fp)) |
1123 | goto err; | |
42e9a92f RL |
1124 | goto out; |
1125 | } | |
1126 | ||
76f6804e AJ |
1127 | if (IS_ERR(fp)) { |
1128 | fc_lport_error(lport, fp); | |
1129 | goto err; | |
1130 | } | |
1131 | ||
42e9a92f RL |
1132 | fh = fc_frame_header_get(fp); |
1133 | ct = fc_frame_payload_get(fp, sizeof(*ct)); | |
1134 | if (fh && ct && fh->fh_type == FC_TYPE_CT && | |
1135 | ct->ct_fs_type == FC_FST_DIR && | |
1136 | ct->ct_fs_subtype == FC_NS_SUBTYPE && | |
1137 | ntohs(ct->ct_cmd) == FC_FS_ACC) | |
1138 | fc_lport_enter_rft_id(lport); | |
1139 | else | |
1140 | fc_lport_error(lport, fp); | |
1141 | ||
1142 | out: | |
1143 | fc_frame_free(fp); | |
1144 | err: | |
1145 | mutex_unlock(&lport->lp_mutex); | |
1146 | } | |
1147 | ||
1148 | /** | |
34f42a07 | 1149 | * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request |
42e9a92f RL |
1150 | * @sp: current sequence in SCR exchange |
1151 | * @fp: response frame | |
1152 | * @lp_arg: Fibre Channel lport port instance that sent the registration request | |
1153 | * | |
1154 | * Locking Note: This function will be called without the lport lock | |
1155 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1156 | * and then unlock the lport. | |
1157 | */ | |
1158 | static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1159 | void *lp_arg) | |
1160 | { | |
1161 | struct fc_lport *lport = lp_arg; | |
1162 | u8 op; | |
1163 | ||
1164 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
1165 | return; | |
1166 | ||
1167 | mutex_lock(&lport->lp_mutex); | |
1168 | ||
7414705e | 1169 | FC_LPORT_DBG(lport, "Received a SCR response\n"); |
42e9a92f RL |
1170 | |
1171 | if (lport->state != LPORT_ST_SCR) { | |
7414705e RL |
1172 | FC_LPORT_DBG(lport, "Received a SCR response, but in state " |
1173 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1174 | if (IS_ERR(fp)) |
1175 | goto err; | |
42e9a92f RL |
1176 | goto out; |
1177 | } | |
1178 | ||
76f6804e AJ |
1179 | if (IS_ERR(fp)) { |
1180 | fc_lport_error(lport, fp); | |
1181 | goto err; | |
1182 | } | |
1183 | ||
42e9a92f RL |
1184 | op = fc_frame_payload_op(fp); |
1185 | if (op == ELS_LS_ACC) | |
1186 | fc_lport_enter_ready(lport); | |
1187 | else | |
1188 | fc_lport_error(lport, fp); | |
1189 | ||
1190 | out: | |
1191 | fc_frame_free(fp); | |
1192 | err: | |
1193 | mutex_unlock(&lport->lp_mutex); | |
1194 | } | |
1195 | ||
1196 | /** | |
34f42a07 | 1197 | * fc_lport_enter_scr() - Send a State Change Register (SCR) request |
42e9a92f RL |
1198 | * @lport: Fibre Channel local port to register for state changes |
1199 | * | |
1200 | * Locking Note: The lport lock is expected to be held before calling | |
1201 | * this routine. | |
1202 | */ | |
1203 | static void fc_lport_enter_scr(struct fc_lport *lport) | |
1204 | { | |
1205 | struct fc_frame *fp; | |
1206 | ||
7414705e RL |
1207 | FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", |
1208 | fc_lport_state(lport)); | |
42e9a92f RL |
1209 | |
1210 | fc_lport_state_enter(lport, LPORT_ST_SCR); | |
1211 | ||
1212 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); | |
1213 | if (!fp) { | |
1214 | fc_lport_error(lport, fp); | |
1215 | return; | |
1216 | } | |
1217 | ||
a46f327a | 1218 | if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, |
42e9a92f RL |
1219 | fc_lport_scr_resp, lport, lport->e_d_tov)) |
1220 | fc_lport_error(lport, fp); | |
1221 | } | |
1222 | ||
1223 | /** | |
34f42a07 | 1224 | * fc_lport_enter_rft_id() - Register FC4-types with the name server |
42e9a92f RL |
1225 | * @lport: Fibre Channel local port to register |
1226 | * | |
1227 | * Locking Note: The lport lock is expected to be held before calling | |
1228 | * this routine. | |
1229 | */ | |
1230 | static void fc_lport_enter_rft_id(struct fc_lport *lport) | |
1231 | { | |
1232 | struct fc_frame *fp; | |
1233 | struct fc_ns_fts *lps; | |
1234 | int i; | |
1235 | ||
7414705e RL |
1236 | FC_LPORT_DBG(lport, "Entered RFT_ID state from %s state\n", |
1237 | fc_lport_state(lport)); | |
42e9a92f RL |
1238 | |
1239 | fc_lport_state_enter(lport, LPORT_ST_RFT_ID); | |
1240 | ||
1241 | lps = &lport->fcts; | |
1242 | i = sizeof(lps->ff_type_map) / sizeof(lps->ff_type_map[0]); | |
1243 | while (--i >= 0) | |
1244 | if (ntohl(lps->ff_type_map[i]) != 0) | |
1245 | break; | |
1246 | if (i < 0) { | |
1247 | /* nothing to register, move on to SCR */ | |
1248 | fc_lport_enter_scr(lport); | |
1249 | return; | |
1250 | } | |
1251 | ||
1252 | fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + | |
1253 | sizeof(struct fc_ns_rft)); | |
1254 | if (!fp) { | |
1255 | fc_lport_error(lport, fp); | |
1256 | return; | |
1257 | } | |
1258 | ||
a46f327a | 1259 | if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RFT_ID, |
42e9a92f RL |
1260 | fc_lport_rft_id_resp, |
1261 | lport, lport->e_d_tov)) | |
1262 | fc_lport_error(lport, fp); | |
1263 | } | |
1264 | ||
1265 | /** | |
34f42a07 | 1266 | * fc_rport_enter_rft_id() - Register port name with the name server |
42e9a92f RL |
1267 | * @lport: Fibre Channel local port to register |
1268 | * | |
1269 | * Locking Note: The lport lock is expected to be held before calling | |
1270 | * this routine. | |
1271 | */ | |
1272 | static void fc_lport_enter_rpn_id(struct fc_lport *lport) | |
1273 | { | |
1274 | struct fc_frame *fp; | |
1275 | ||
7414705e RL |
1276 | FC_LPORT_DBG(lport, "Entered RPN_ID state from %s state\n", |
1277 | fc_lport_state(lport)); | |
42e9a92f RL |
1278 | |
1279 | fc_lport_state_enter(lport, LPORT_ST_RPN_ID); | |
1280 | ||
1281 | fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + | |
1282 | sizeof(struct fc_ns_rn_id)); | |
1283 | if (!fp) { | |
1284 | fc_lport_error(lport, fp); | |
1285 | return; | |
1286 | } | |
1287 | ||
a46f327a | 1288 | if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RPN_ID, |
42e9a92f RL |
1289 | fc_lport_rpn_id_resp, |
1290 | lport, lport->e_d_tov)) | |
1291 | fc_lport_error(lport, fp); | |
1292 | } | |
1293 | ||
1294 | static struct fc_rport_operations fc_lport_rport_ops = { | |
1295 | .event_callback = fc_lport_rport_callback, | |
1296 | }; | |
1297 | ||
1298 | /** | |
34f42a07 | 1299 | * fc_rport_enter_dns() - Create a rport to the name server |
42e9a92f RL |
1300 | * @lport: Fibre Channel local port requesting a rport for the name server |
1301 | * | |
1302 | * Locking Note: The lport lock is expected to be held before calling | |
1303 | * this routine. | |
1304 | */ | |
1305 | static void fc_lport_enter_dns(struct fc_lport *lport) | |
1306 | { | |
ab28f1fd | 1307 | struct fc_rport_priv *rdata; |
795d86f5 | 1308 | struct fc_rport_identifiers ids; |
42e9a92f | 1309 | |
795d86f5 JE |
1310 | ids.port_id = FC_FID_DIR_SERV; |
1311 | ids.port_name = -1; | |
1312 | ids.node_name = -1; | |
1313 | ids.roles = FC_RPORT_ROLE_UNKNOWN; | |
42e9a92f | 1314 | |
7414705e RL |
1315 | FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", |
1316 | fc_lport_state(lport)); | |
42e9a92f RL |
1317 | |
1318 | fc_lport_state_enter(lport, LPORT_ST_DNS); | |
1319 | ||
9fb9d328 JE |
1320 | rdata = lport->tt.rport_create(lport, &ids); |
1321 | if (!rdata) | |
42e9a92f RL |
1322 | goto err; |
1323 | ||
42e9a92f | 1324 | rdata->ops = &fc_lport_rport_ops; |
9fb9d328 | 1325 | lport->tt.rport_login(rdata); |
42e9a92f RL |
1326 | return; |
1327 | ||
1328 | err: | |
1329 | fc_lport_error(lport, NULL); | |
1330 | } | |
1331 | ||
1332 | /** | |
34f42a07 | 1333 | * fc_lport_timeout() - Handler for the retry_work timer. |
42e9a92f RL |
1334 | * @work: The work struct of the fc_lport |
1335 | */ | |
1336 | static void fc_lport_timeout(struct work_struct *work) | |
1337 | { | |
1338 | struct fc_lport *lport = | |
1339 | container_of(work, struct fc_lport, | |
1340 | retry_work.work); | |
1341 | ||
1342 | mutex_lock(&lport->lp_mutex); | |
1343 | ||
1344 | switch (lport->state) { | |
b1d9fd55 | 1345 | case LPORT_ST_DISABLED: |
42e9a92f RL |
1346 | case LPORT_ST_READY: |
1347 | case LPORT_ST_RESET: | |
1348 | WARN_ON(1); | |
1349 | break; | |
1350 | case LPORT_ST_FLOGI: | |
1351 | fc_lport_enter_flogi(lport); | |
1352 | break; | |
1353 | case LPORT_ST_DNS: | |
1354 | fc_lport_enter_dns(lport); | |
1355 | break; | |
1356 | case LPORT_ST_RPN_ID: | |
1357 | fc_lport_enter_rpn_id(lport); | |
1358 | break; | |
1359 | case LPORT_ST_RFT_ID: | |
1360 | fc_lport_enter_rft_id(lport); | |
1361 | break; | |
1362 | case LPORT_ST_SCR: | |
1363 | fc_lport_enter_scr(lport); | |
1364 | break; | |
1365 | case LPORT_ST_LOGO: | |
1366 | fc_lport_enter_logo(lport); | |
1367 | break; | |
1368 | } | |
1369 | ||
1370 | mutex_unlock(&lport->lp_mutex); | |
1371 | } | |
1372 | ||
1373 | /** | |
34f42a07 | 1374 | * fc_lport_logo_resp() - Handle response to LOGO request |
42e9a92f RL |
1375 | * @sp: current sequence in LOGO exchange |
1376 | * @fp: response frame | |
1377 | * @lp_arg: Fibre Channel lport port instance that sent the LOGO request | |
1378 | * | |
1379 | * Locking Note: This function will be called without the lport lock | |
1380 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1381 | * and then unlock the lport. | |
1382 | */ | |
1383 | static void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1384 | void *lp_arg) | |
1385 | { | |
1386 | struct fc_lport *lport = lp_arg; | |
1387 | u8 op; | |
1388 | ||
1389 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
1390 | return; | |
1391 | ||
1392 | mutex_lock(&lport->lp_mutex); | |
1393 | ||
7414705e | 1394 | FC_LPORT_DBG(lport, "Received a LOGO response\n"); |
42e9a92f RL |
1395 | |
1396 | if (lport->state != LPORT_ST_LOGO) { | |
7414705e RL |
1397 | FC_LPORT_DBG(lport, "Received a LOGO response, but in state " |
1398 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1399 | if (IS_ERR(fp)) |
1400 | goto err; | |
42e9a92f RL |
1401 | goto out; |
1402 | } | |
1403 | ||
76f6804e AJ |
1404 | if (IS_ERR(fp)) { |
1405 | fc_lport_error(lport, fp); | |
1406 | goto err; | |
1407 | } | |
1408 | ||
42e9a92f RL |
1409 | op = fc_frame_payload_op(fp); |
1410 | if (op == ELS_LS_ACC) | |
1190d925 | 1411 | fc_lport_enter_disabled(lport); |
42e9a92f RL |
1412 | else |
1413 | fc_lport_error(lport, fp); | |
1414 | ||
1415 | out: | |
1416 | fc_frame_free(fp); | |
1417 | err: | |
1418 | mutex_unlock(&lport->lp_mutex); | |
1419 | } | |
1420 | ||
1421 | /** | |
34f42a07 | 1422 | * fc_rport_enter_logo() - Logout of the fabric |
42e9a92f RL |
1423 | * @lport: Fibre Channel local port to be logged out |
1424 | * | |
1425 | * Locking Note: The lport lock is expected to be held before calling | |
1426 | * this routine. | |
1427 | */ | |
1428 | static void fc_lport_enter_logo(struct fc_lport *lport) | |
1429 | { | |
1430 | struct fc_frame *fp; | |
1431 | struct fc_els_logo *logo; | |
1432 | ||
7414705e RL |
1433 | FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", |
1434 | fc_lport_state(lport)); | |
42e9a92f RL |
1435 | |
1436 | fc_lport_state_enter(lport, LPORT_ST_LOGO); | |
1437 | ||
42e9a92f RL |
1438 | fp = fc_frame_alloc(lport, sizeof(*logo)); |
1439 | if (!fp) { | |
1440 | fc_lport_error(lport, fp); | |
1441 | return; | |
1442 | } | |
1443 | ||
a46f327a JE |
1444 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, |
1445 | fc_lport_logo_resp, lport, lport->e_d_tov)) | |
42e9a92f RL |
1446 | fc_lport_error(lport, fp); |
1447 | } | |
1448 | ||
1449 | /** | |
34f42a07 | 1450 | * fc_lport_flogi_resp() - Handle response to FLOGI request |
42e9a92f RL |
1451 | * @sp: current sequence in FLOGI exchange |
1452 | * @fp: response frame | |
1453 | * @lp_arg: Fibre Channel lport port instance that sent the FLOGI request | |
1454 | * | |
1455 | * Locking Note: This function will be called without the lport lock | |
1456 | * held, but it will lock, call an _enter_* function or fc_lport_error | |
1457 | * and then unlock the lport. | |
1458 | */ | |
1459 | static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, | |
1460 | void *lp_arg) | |
1461 | { | |
1462 | struct fc_lport *lport = lp_arg; | |
1463 | struct fc_frame_header *fh; | |
1464 | struct fc_els_flogi *flp; | |
1465 | u32 did; | |
1466 | u16 csp_flags; | |
1467 | unsigned int r_a_tov; | |
1468 | unsigned int e_d_tov; | |
1469 | u16 mfs; | |
1470 | ||
1471 | if (fp == ERR_PTR(-FC_EX_CLOSED)) | |
1472 | return; | |
1473 | ||
1474 | mutex_lock(&lport->lp_mutex); | |
1475 | ||
7414705e | 1476 | FC_LPORT_DBG(lport, "Received a FLOGI response\n"); |
42e9a92f RL |
1477 | |
1478 | if (lport->state != LPORT_ST_FLOGI) { | |
7414705e RL |
1479 | FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " |
1480 | "%s\n", fc_lport_state(lport)); | |
76f6804e AJ |
1481 | if (IS_ERR(fp)) |
1482 | goto err; | |
42e9a92f RL |
1483 | goto out; |
1484 | } | |
1485 | ||
76f6804e AJ |
1486 | if (IS_ERR(fp)) { |
1487 | fc_lport_error(lport, fp); | |
1488 | goto err; | |
1489 | } | |
1490 | ||
42e9a92f RL |
1491 | fh = fc_frame_header_get(fp); |
1492 | did = ntoh24(fh->fh_d_id); | |
1493 | if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { | |
1494 | ||
7414705e RL |
1495 | printk(KERN_INFO "libfc: Assigned FID (%6x) in FLOGI response\n", |
1496 | did); | |
42e9a92f RL |
1497 | fc_host_port_id(lport->host) = did; |
1498 | ||
1499 | flp = fc_frame_payload_get(fp, sizeof(*flp)); | |
1500 | if (flp) { | |
1501 | mfs = ntohs(flp->fl_csp.sp_bb_data) & | |
1502 | FC_SP_BB_DATA_MASK; | |
1503 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && | |
1504 | mfs < lport->mfs) | |
1505 | lport->mfs = mfs; | |
1506 | csp_flags = ntohs(flp->fl_csp.sp_features); | |
1507 | r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); | |
1508 | e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); | |
1509 | if (csp_flags & FC_SP_FT_EDTR) | |
1510 | e_d_tov /= 1000000; | |
1511 | if ((csp_flags & FC_SP_FT_FPORT) == 0) { | |
1512 | if (e_d_tov > lport->e_d_tov) | |
1513 | lport->e_d_tov = e_d_tov; | |
1514 | lport->r_a_tov = 2 * e_d_tov; | |
7414705e RL |
1515 | printk(KERN_INFO "libfc: Port (%6x) entered " |
1516 | "point to point mode\n", did); | |
42e9a92f RL |
1517 | fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id), |
1518 | get_unaligned_be64( | |
1519 | &flp->fl_wwpn), | |
1520 | get_unaligned_be64( | |
1521 | &flp->fl_wwnn)); | |
1522 | } else { | |
1523 | lport->e_d_tov = e_d_tov; | |
1524 | lport->r_a_tov = r_a_tov; | |
1525 | fc_host_fabric_name(lport->host) = | |
1526 | get_unaligned_be64(&flp->fl_wwnn); | |
1527 | fc_lport_enter_dns(lport); | |
1528 | } | |
1529 | } | |
1530 | ||
1531 | if (flp) { | |
1532 | csp_flags = ntohs(flp->fl_csp.sp_features); | |
1533 | if ((csp_flags & FC_SP_FT_FPORT) == 0) { | |
1534 | lport->tt.disc_start(fc_lport_disc_callback, | |
1535 | lport); | |
1536 | } | |
1537 | } | |
1538 | } else { | |
7414705e | 1539 | FC_LPORT_DBG(lport, "Bad FLOGI response\n"); |
42e9a92f RL |
1540 | } |
1541 | ||
1542 | out: | |
1543 | fc_frame_free(fp); | |
1544 | err: | |
1545 | mutex_unlock(&lport->lp_mutex); | |
1546 | } | |
1547 | ||
1548 | /** | |
34f42a07 | 1549 | * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager |
42e9a92f RL |
1550 | * @lport: Fibre Channel local port to be logged in to the fabric |
1551 | * | |
1552 | * Locking Note: The lport lock is expected to be held before calling | |
1553 | * this routine. | |
1554 | */ | |
1555 | void fc_lport_enter_flogi(struct fc_lport *lport) | |
1556 | { | |
1557 | struct fc_frame *fp; | |
1558 | ||
7414705e RL |
1559 | FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", |
1560 | fc_lport_state(lport)); | |
42e9a92f RL |
1561 | |
1562 | fc_lport_state_enter(lport, LPORT_ST_FLOGI); | |
1563 | ||
1564 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); | |
1565 | if (!fp) | |
1566 | return fc_lport_error(lport, fp); | |
1567 | ||
a46f327a | 1568 | if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_FLOGI, |
42e9a92f RL |
1569 | fc_lport_flogi_resp, lport, lport->e_d_tov)) |
1570 | fc_lport_error(lport, fp); | |
1571 | } | |
1572 | ||
1573 | /* Configure a fc_lport */ | |
1574 | int fc_lport_config(struct fc_lport *lport) | |
1575 | { | |
1576 | INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); | |
1577 | mutex_init(&lport->lp_mutex); | |
1578 | ||
b1d9fd55 | 1579 | fc_lport_state_enter(lport, LPORT_ST_DISABLED); |
42e9a92f RL |
1580 | |
1581 | fc_lport_add_fc4_type(lport, FC_TYPE_FCP); | |
1582 | fc_lport_add_fc4_type(lport, FC_TYPE_CT); | |
1583 | ||
1584 | return 0; | |
1585 | } | |
1586 | EXPORT_SYMBOL(fc_lport_config); | |
1587 | ||
1588 | int fc_lport_init(struct fc_lport *lport) | |
1589 | { | |
1590 | if (!lport->tt.lport_recv) | |
1591 | lport->tt.lport_recv = fc_lport_recv_req; | |
1592 | ||
1593 | if (!lport->tt.lport_reset) | |
1594 | lport->tt.lport_reset = fc_lport_reset; | |
1595 | ||
1596 | fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; | |
1597 | fc_host_node_name(lport->host) = lport->wwnn; | |
1598 | fc_host_port_name(lport->host) = lport->wwpn; | |
1599 | fc_host_supported_classes(lport->host) = FC_COS_CLASS3; | |
1600 | memset(fc_host_supported_fc4s(lport->host), 0, | |
1601 | sizeof(fc_host_supported_fc4s(lport->host))); | |
1602 | fc_host_supported_fc4s(lport->host)[2] = 1; | |
1603 | fc_host_supported_fc4s(lport->host)[7] = 1; | |
1604 | ||
1605 | /* This value is also unchanging */ | |
1606 | memset(fc_host_active_fc4s(lport->host), 0, | |
1607 | sizeof(fc_host_active_fc4s(lport->host))); | |
1608 | fc_host_active_fc4s(lport->host)[2] = 1; | |
1609 | fc_host_active_fc4s(lport->host)[7] = 1; | |
1610 | fc_host_maxframe_size(lport->host) = lport->mfs; | |
1611 | fc_host_supported_speeds(lport->host) = 0; | |
1612 | if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) | |
1613 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; | |
1614 | if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) | |
1615 | fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; | |
1616 | ||
96316099 | 1617 | INIT_LIST_HEAD(&lport->ema_list); |
42e9a92f RL |
1618 | return 0; |
1619 | } | |
1620 | EXPORT_SYMBOL(fc_lport_init); |